| 单词 | insulator |
| 例句 | G02 released by the volcanoes into the atmosphere will in time serve as an insulator, holding in the long-wave heat-energy reflected from the earth, while permitting direct solar heat to enter undiminished. The Left Hand of Darkness 1969-03-01T00:00:00Z “My insulator has been murdered. I’m pretty sure of that. By the CCD. For the time being, I’ve got no way of contacting my clients.” The Book of Dust: La Belle Sauvage 2017-10-19T00:00:00Z “Naturally, I didn't know he was your insulator. I hadn’t heard about the strangling either. Any chance that this is just a child’s fantasy?” The Book of Dust: La Belle Sauvage 2017-10-19T00:00:00Z Our sleeping-bags, coats, and hoods were lined with that same fur, an unsurpassed insulator and very beautiful to see. The Left Hand of Darkness 1969-03-01T00:00:00Z Human skin can be a relatively good insulator, if it is dry. Escape from Camp 14: One Man's Remarkable Odyssey from North Korea to Freedom in the West 2013-03-26T00:00:00Z “Actually, I had. Anyway, if there’s an insulator in place, I can use these new boxes straightaway. Harry...you’ve got children at school, haven’t you?” The Book of Dust: La Belle Sauvage 2017-10-19T00:00:00Z “Do nothing more than look for the new boxes. When Oakley Street’s put a new insulator in place, I’ll let you know.” The Book of Dust: La Belle Sauvage 2017-10-19T00:00:00Z Cooksey’s new tank compiled everything the lab had learned about how to build a cyclotron into a rugged, gleaming, machined tank with glass insulators and arrangements for air and water cooling. Big Science 2015-07-07T00:00:00Z “Quite. Are you sure that Oakley Street doesn’t know about your insulator?” The Book of Dust: La Belle Sauvage 2017-10-19T00:00:00Z The rest of it was strange to her; she could see no principle behind the coils, the jars, the banks of insulators, the lattice of tubing. The Amber Spyglass 2000-10-10T00:00:00Z "Whatever you say about the euro, it's a great insulator." Irishman makes "billion-euro home" of shredded notes 2012-01-25T09:49:45Z Down, made from clusters of duck or goose feathers, is a superior insulator while remaining breathable and lightweight. How to pick a warm winter coat 2021-12-06T05:00:00Z But most of the building remains defiantly garage-like, down to old ceramic electrical insulators jutting from the basement walls. SculptureCenter in Queens Is Ready for Its Latest Act 2014-10-01T04:00:00Z His father works in Norfolk as an insulator craft supervisor at BAE Systems, a multinational defense, security and aerospace company. Jessica Mercer, Derek Bazemore Jr. 2019-09-29T04:00:00Z Invented in Cincinnati in 1913 by engineers Daniel O'Conor and Herbert Faber, Formica laminate was designed to be an electrical insulator, to serve as a replacement for the silicate mineral mica – hence "for mica". Formica turns 100 2013-01-17T10:18:40Z This snug-fitting garment allows you to adjust your warmth level using nature’s most basic insulator — air. From Goggles to Binding, Ski Gear Gets an Upgrade 2015-12-10T05:00:00Z SAT Sale of insulators, bottles and other collectibles, bring items to be trade, sell, or get info about, 9 a.m.-4 p.m. Community calendar: festivals, fairs and more 2013-03-20T21:57:25Z SAT Jefferson Insulator Club displays, swap meet, appraisals of insulators, electrical artifacts, signs, bottles, bring something for potluck lunch, 9 a.m. Community calendar: festivals, fairs and more 2014-03-19T16:30:03Z SAT Bring insulators, electrical artifacts, signs, bottles to trade, sell or giveaway and something to share for potluck lunch, 9 a.m. Community calendar 2012-03-14T22:30:06Z One in particular that caught his eye was a beer can insulator. Capturing the Joyful Spirit of a Montana General Store 2022-06-13T04:00:00Z MS, which affects about 100,000 people in the UK, occurs when the immune system attacks the protective myelin sheath that surrounds nerve fibres and acts as an insulator. Lack of vitamin D may cause multiple sclerosis, study finds 2015-08-25T04:00:00Z MIT is a phenomenon wherein an insulator becomes capable of conducting electricity when subjected to external factors like changes in the concentration or temperature of an ambient gas. Preventing hydrogen vehicle aging during sudden stops 2023-11-16T05:00:00Z Technologies at the research stage include glazing units containing aerogel - an extremely light, porous material that is an exceptionally good insulator. Could triple glazing become a UK standard? 2023-11-13T05:00:00Z “You get either an insulator or an extremely poor metal,” he says — not a superconductor. Nature Retracts Controversial Room-Temperature Superconductor Study 2023-11-08T05:00:00Z The government later ruled her death to be work-related because the heating in her dormitory — a flimsy dwelling made from sheets of synthetic insulator — had broken down, allowing the bitter cold to accelerate her death. Facing a labor crisis, South Korea turns to migrants. Why are they more likely to die on the job? 2023-10-30T04:00:00Z "In a QAH insulator, electrons on one side of the material travel in one direction, while those on the other side travel in the opposite direction, like a two-lane highway," Chang said. Electrical control of quantum phenomenon could improve future electronic devices 2023-10-19T04:00:00Z "Our motivation was to use these easily accessible objects to create a low-frequency insulating panel structure. Pingpong balls therefore present an economical alternative to acoustic insulators for both low cost and potential recycling." Pingpong balls score big as sound absorbers 2023-10-10T04:00:00Z The microstrip line resonator sensor is fabricated on a dielectric substrate, which is an insulator that can efficiently support electrostatic fields, such as ceramic or glass. Sweet Victory: Sensor detects adulteration in honey 2023-10-10T04:00:00Z To create the Hubbard excitons, the researchers applied light to a type of insulating material known as an antiferromagnetic Mott insulator. Physicists find evidence for magnetically bound excitons 2023-10-05T04:00:00Z YIG is an insulator but allows for a magnetic field effect when a thin layer of platinum is glued to it. Electrons take flight at the nanoscale 2023-09-19T04:00:00Z They found that applying a 5-millisecond current pulse to the QAH insulator impacts the internal magnetism of the material and causes the electrons to change directions. Electrical control of quantum phenomenon could improve future electronic devices 2023-10-19T04:00:00Z But, Ms Mitra says, this wide variation in temperature is significant because it shows that Moon's soil - called lunar regolith - is a very good insulator. Chandrayaan-3: How important are India's Moon mission findings? 2023-09-18T04:00:00Z As it turns out, Earth’s rotation deflects the flow of fluids in a way that’s analogous to how magnetic fields twist the paths of electrons moving through quantum materials called topological insulators. Quantum Physics Can Explain Earth’s Weather 2023-08-24T04:00:00Z "In most insulators, oppositely charged electrons and holes interact with one another just as an electron and a proton bind to form a hydrogen atom," Mehio explains. Physicists find evidence for magnetically bound excitons 2023-10-05T04:00:00Z However, glass is a lousy insulator, so in very hot climates, single-pane windows completely protected from the sun can still become uncomfortably warm. Why Homes Often Feel Warmer Than the Thermostat Suggests 2023-08-04T04:00:00Z The researchers previously optimized the QAH insulator so that they could take advantage of a physical mechanism in the system to control its internal magnetism. Electrical control of quantum phenomenon could improve future electronic devices 2023-10-19T04:00:00Z "This could mean it could be used to build space colonies to keep heat and cold and radiation out. This would make it a natural insulator for habitat," she says. Chandrayaan-3: How important are India's Moon mission findings? 2023-09-18T04:00:00Z If you imagine the planet as a giant topological insulator, they said, you can explain the origin of the equatorial Kelvin waves. Quantum Physics Can Explain Earth’s Weather 2023-08-24T04:00:00Z "However, in a special class of materials known as Mott insulators, the photo-excited electrons and holes instead bind through magnetic interactions." Physicists find evidence for magnetically bound excitons 2023-10-05T04:00:00Z The retracted paper does not involve superconductivity but rather describes how a relatively mundane material, manganese sulfide, shifts its behavior from an insulator to a metal and then back to an insulator under increasing pressure. A Looming Retraction Casts a Shadow Over a Field of Physics 2023-07-26T04:00:00Z "By narrowing the QAH insulator devices, the current pulse resulted in very high current density that switched the magnetization direction, as well as the direction of the electron transport route." Electrical control of quantum phenomenon could improve future electronic devices 2023-10-19T04:00:00Z They include semiconductors in which conductivity increases with temperature, as well as dielectrics, which are insulators that change their charge properties, or “polarize,” in electric fields. Shape-Shifting, Self-Healing Machines Are Among Us 2023-07-26T04:00:00Z And here’s where the story begins for the second time, with the relatively recent discovery of the quantum behavior of electrons in topological insulators. Quantum Physics Can Explain Earth’s Weather 2023-08-24T04:00:00Z A pipe insulator and weightlifter named John, who had worked at South Pole for more than 17 seasons, remembered when boxes of these bacon bars had filled whole shelves in the old station. Astrophysics and stale beer: What life is like working at the South Pole 2023-05-29T04:00:00Z Plaster is mold-resistant and a natural insulator compared to drywall due to its thickness. Using plaster v. drywall in your DIY repairs 2023-05-22T04:00:00Z The hair on your skin rises, trapping more air, which is a good insulator, near your skin. Fundamentals of Biology 2015-01-01T00:00:00Z Some axons are covered with a special structure called a myelin sheath, which acts as an insulator to keep the electrical signal from dissipating as it travels down the axon. Concepts of Biology 2013-04-25T00:00:00Z When Marston and his colleagues looked at Earth’s equatorial Kelvin waves, they saw a regularity that made them wonder if the waves were analogous to the edge current in a topological insulator. Quantum Physics Can Explain Earth’s Weather 2023-08-24T04:00:00Z The other material, however, always remains an insulator. How Much Does ‘Nothing’ Weigh? 2023-04-29T04:00:00Z Storing heat underground tends to work well because it is very hard for the heat to escape - the ground itself acts as one big insulator. The plan to make a giant hot water bottle underground 2023-04-13T04:00:00Z She was at her job as an insulator apprentice, monitoring her co-workers as they wrapped rolls of fiberglass around pipes, when she saw Grimm's name flash on her phone. Doctors warned her pregnancy could kill her. Then Tennessee outlawed abortion 2023-03-15T04:00:00Z But the intricate structure and large volume of air inside it mean that aerogel is an amazingly good insulator. Is there a better way to insulate our draughty homes? 2023-03-09T05:00:00Z In the planetary version of a topological insulator, equatorial Kelvin waves are like the current flowing at a quantum material’s edge. Quantum Physics Can Explain Earth’s Weather 2023-08-24T04:00:00Z Replacing them requires workers to remove bolts, fasteners, insulators and rail before each worn grout pad is demolished. Metro to reduce late-night service for three weeks for maintenance work 2023-02-24T05:00:00Z Metallic ores are good conductors of electricity, the glove is an insulator that prevents the current travelling through the person's body to the ground. Can these rocks really power light bulbs? No, say the experts 2023-01-25T05:00:00Z These engineered crystal lattices transport sound in highly unusual, nonreciprocal ways, reminiscent of how electrons travel with unique features in topological insulators. Engineered Metamaterials Can Trick Light and Sound into Mind-Bending Behavior 2022-11-18T05:00:00Z It works so well as an insulator because heat finds it difficult to move across all the air pockets in aerogel that block its path. Is there a better way to insulate our draughty homes? 2023-03-09T05:00:00Z These immense waves propagate around the equator because it is the boundary between two insulators, the hemispheres. Quantum Physics Can Explain Earth’s Weather 2023-08-24T04:00:00Z One such case concerned a dispute over insulator covers to protect rail power-cable connections, colloquially known as “orange boots.” Silver Line’s second phase was to be different. It fell into the same trap. 2022-11-12T05:00:00Z He started the business with just $10,000, armed with his own formula for a material to make ceramic insulators for televisions. Kazuo Inamori, Major Industrialist in Postwar Japan, Dies at 90 2022-09-02T04:00:00Z Because the glass rod is an insulator, it must actually touch the electroscope to transfer charge to or from it. College Physics for AP Courses 2015-08-12T00:00:00Z Dr Kaufmann notes that there are alternatives, such as vacuum insulation panels, which are extremely effective insulators, though they might be fragile, more rigid and not much cheaper. Is there a better way to insulate our draughty homes? 2023-03-09T05:00:00Z They stand up to perturbations, he explained, in the same way that the edge current of a topological insulator flows without dissipating and with no regard for impurities in the material. Quantum Physics Can Explain Earth’s Weather 2023-08-24T04:00:00Z Would the amount of heat measured for the reaction in Example 5.5 be greater, lesser, or remain the same if we used a calorimeter that was a poorer insulator than a coffee cup calorimeter? Chemistry 2019-02-14T00:00:00Z Some axons are covered with myelin, which acts as an insulator to minimize dissipation of the electrical signal as it travels down the axon, greatly increasing the speed on conduction. Biology for AP Courses 2022-06-09T00:00:00Z When a charged rod is brought near a neutral substance, an insulator in this case, the distribution of charge in atoms and molecules is shifted slightly. College Physics for AP Courses 2015-08-12T00:00:00Z His backstory involves hundreds of colored glass insulators lined up on rows of shelves outside his gallery. On Salt Spring Island in the Southern Gulf Islands, take a charming self-guided studio tour 2022-08-18T04:00:00Z To confirm that on the largest scale, Earth’s fluids behave like electrons in a topological insulator, the team needed to find topologically twisted waves somewhere farther from the equator. Quantum Physics Can Explain Earth’s Weather 2023-08-24T04:00:00Z Would the amount of heat absorbed by the dissolution in Example 5.6 appear greater, lesser, or remain the same if the experimenter used a calorimeter that was a poorer insulator than a coffee cup calorimeter? Chemistry 2019-02-14T00:00:00Z Myelin acts as an insulator that prevents current from leaving the axon; this increases the speed of action potential conduction. Biology for AP Courses 2022-06-09T00:00:00Z Van de Graaffs utilize both smooth and pointed surfaces, and conductors and insulators to generate large static charges and, hence, large voltages. College Physics for AP Courses 2015-08-12T00:00:00Z Because rock is a good insulator, the temperature of the descending oceanic slab increases slowly relative to the more rapidly increasing pressure, creating a metamorphic environment of high pressure and low temperature. An Introduction to Geology 2017-01-01T00:00:00Z Researchers are studying topology in fluids from magnetized plasmas to collections of self-propelled particles; Delplace and Venaille are wondering whether the dynamics of stellar plasma might also resemble a topological insulator. Quantum Physics Can Explain Earth’s Weather 2023-08-24T04:00:00Z MO theory also helps us understand why some substances are electrical conductors, others are semiconductors, and still others are insulators. Chemistry 2019-02-14T00:00:00Z Many axons are wrapped by a myelin sheath, a lipid derivative that acts as an insulator and speeds up the transmission of the action potential. Anatomy and Physiology 2013-06-19T00:00:00Z Not only does the smaller d make the capacitance greater, but many insulators can withstand greater electric fields than air before breaking down. College Physics for AP Courses 2015-08-12T00:00:00Z To lower the risks of wildfires caused by birds, utilities companies can cover wires on the poles with plastic insulators to keep birds from frying themselves. Like a Bird on a Wire That Starts a Wildfire 2022-06-29T04:00:00Z It’s still unclear whether, in the biggest picture, treating Earth as a topological insulator will unlock the mysteries of large-scale weather patterns, or maybe even lead to new geophysical discoveries. Quantum Physics Can Explain Earth’s Weather 2023-08-24T04:00:00Z Figure 8.39 shows the bands for three important classes of materials: insulators, semiconductors, and conductors. Chemistry 2019-02-14T00:00:00Z Silicon and silicon carbide are useful in electronics because they are semiconductors: They can switch between being electrical conductors, as metals are, and insulators, as most plastics are. What’s Down the Road for Silicon? 2022-05-16T04:00:00Z Usually the best way to help the victim is to give the fist a hard knock/blow/jar with an insulator or to throw an insulator at the fist. College Physics for AP Courses 2015-08-12T00:00:00Z Snow can act as an insulator, protecting overwintering crops. Boost the productivity of your vegetable garden year-round, wherever you live or plant 2022-05-13T04:00:00Z It was first used in construction in the 1930s and became ubiquitous as an insulator in schools, hospitals, homes and offices as well as consumer products. E.P.A. to Propose Restrictions on Asbestos 2022-04-05T04:00:00Z In an insulator, the band gap is large, so that very few electrons move, and they are poor conductors of electricity. Chemistry 2019-02-14T00:00:00Z Soil covers the top of the residence and surrounds it on three sides, serving as a natural insulator. An eco-friendly dome built into the Topanga hills seeks $1.6 million 2021-11-18T05:00:00Z There is no discernible effect on a bob made of an insulator. College Physics for AP Courses 2015-08-12T00:00:00Z They studied how the SARS-CoV-2 virus interacts with inner ear cells like hair cells, nerve fibers, supporting cells and neuron insulators known as Schwann cells. COVID-19 can infect the ears — causing a chronic condition some call "Covid ear" 2021-11-19T05:00:00Z It "is a good insulator to a tendency or desire to compare ourselves to others, or to compete with others," Pelc explained. Yom Kippur is a reminder to Americans that humility is good for your health 2021-09-15T04:00:00Z In an insulator, the band gap is so “large” that very few electrons move into the conduction band; as a result, insulators are poor conductors of electricity. Chemistry 2019-02-14T00:00:00Z This gas is a great insulator - handy in a fridge but not in the atmosphere. The 'ghostbusters' who are helping tackle climate change 2021-04-18T04:00:00Z The amount of available space for airflow determines whether air acts as an insulator or conductor. College Physics for AP Courses 2015-08-12T00:00:00Z Newspaper is a good insulator, so why not turn it into a useful item that will protect your table from scorching dishes? Hot Dish! The Newspaper Makes a Great Trivet 2021-02-20T05:00:00Z Applying an electric field transformed the stack from a conductor to an insulator and then, suddenly, into a superconductor: a material that frictionlessly conducts electricity. Twisted graphene could power a new generation of superconducting electronics 2020-11-19T05:00:00Z Semiconductors are in between: they conduct electricity better than insulators, but not as well as conductors. Chemistry 2019-02-14T00:00:00Z Help keep your pipes from freezing by placing foam insulators over any outdoor spigots. Prepping your home for rough weather | Produced by Seattle Times Marketing 2020-10-16T04:00:00Z An insulator holds charge within its atomic structure. College Physics for AP Courses 2015-08-12T00:00:00Z The atmosphere is a great insulator, but when the strength of the electric field overwhelms the insulating capacity of the atmosphere, intra-cloud lightning occurs. How a Pacific storm fueled lightning that sparked California's biggest-ever fire season 2020-09-09T04:00:00Z That collective behavior enables a modest number of electrons, shepherded to the right place by an electric field, to radically change the material’s behavior, from insulator to conductor to superconductor. Twisted graphene could power a new generation of superconducting electronics 2020-11-19T05:00:00Z “That was really surprising,” Lovley says, because proteins are generally thought to be insulators. ‘Electric mud’ teems with new, mysterious bacteria 2020-08-19T04:00:00Z Once the grey ceramic insulators were attached, Dodson’s bucket was lifted even higher, several feet above the pole. Restoring lights can be a complicated job for line workers 2020-08-08T04:00:00Z In an insulator, the organization of the atoms and the structure do not allow for such free electrons. College Physics for AP Courses 2015-08-12T00:00:00Z But heat transfers slowly between the layers of the cell, because the electrodes, electrolyte and separator are thermal insulators. Cool metric for lithium-ion batteries could spur progress 2020-06-22T04:00:00Z It’s actually a great fabric year-round; during the winter months, the hollow fiber acts as a natural insulator and helps retain body warmth as temperatures drop. Parachute founder Ariel Kaye on creating the ultimate bed | Produced by Seattle Times Marketing 2020-06-12T04:00:00Z Then they treated the metal with an electrochemical process that converted it into an insulator called aluminum oxide. New Artificial Eye Mimics a Retina’s Natural Curve 2020-05-20T04:00:00Z A thick but flexible aluminum rod wrapped around the conductors held them to the insulators. Restoring lights can be a complicated job for line workers 2020-08-08T04:00:00Z The materials listed in the table are separated into categories of conductors, semiconductors, and insulators, based on broad groupings of resistivities. College Physics for AP Courses 2015-08-12T00:00:00Z On Dec. 10, damaged or worn insulators that protect and separate the electrified third rail allowed electricity to escape, sparking a fire. Problems cited after Metro’s L’Enfant Plaza disaster continue in rail operations center, safety commission finds 2020-05-12T04:00:00Z In 1977, he won a share of the Nobel Prize in Physics for his discovery of electron localization, whereby disordered metals become insulators, and for his pioneering work on magnetism. Philip W. Anderson (1923–2020) 2020-04-30T04:00:00Z The Nobel laureate specialized in condensed matter, and his concept of ‘Anderson localization’ of electrons explains everything from how fog reflects light to why non-crystalline metals are electrical insulators. Daily briefing: How to defend a PhD remotely 2020-03-30T04:00:00Z PCBs are man-made chemicals used as coolants and lubricants in electrical equipment because they don’t burn easily and are good insulators. State places consumption limits on fish caught in Squam Lake 2020-03-30T04:00:00Z What current flows through the insulator if the voltage is 200 kV? College Physics for AP Courses 2015-08-12T00:00:00Z As the name suggests, these materials are insulators — that is, they do not conduct electricity in their interior. Quantum cascade laser lives on the edge 2020-02-11T05:00:00Z Work on semiconductors at Bell Labs led Anderson to propose in 1957 that disorder — such as that caused by defects and impurities in a material — localizes electron waves, producing an insulator. Philip W. Anderson (1923–2020) 2020-04-30T04:00:00Z Damaged or worn insulators that protect and separate Metrorail’s electrified third rail from the track allowed electricity to escape and ignite flammable substances around the track. Metro cited for multiple safety violations after Red Line fires 2019-12-20T05:00:00Z The property that sets them apart from ordinary insulators is that their surfaces cannot be made to have a simple insulating state as long as time-reversal symmetry is unbroken. Magnetic and topological order united in a crystal 2019-12-17T05:00:00Z When an insulating material is used, the eddy current is extremely small, and so magnetic damping on insulators is negligible. College Physics for AP Courses 2015-08-12T00:00:00Z Topological insulators are so insensitive to disorder that they were previously used to define the unit of resistance: the ohm. Quantum cascade laser lives on the edge 2020-02-11T05:00:00Z Good insulators, the materials are pleasant to the touch and exceptionally resistant to acids and oils. Books for our time: seven classics that speak to us now 2019-12-12T05:00:00Z Officials said Tuesday’s issues were caused by arcing insulators. Metro’s mobile fare payment system coming in 2020 2019-12-12T05:00:00Z This makes topological insulators ideal platforms for generating excitations known as Majorana zero modes, which are the basis for a topological approach to quantum computing5. Magnetic and topological order united in a crystal 2019-12-17T05:00:00Z Although air can transfer heat rapidly by convection, it is a poor conductor and thus a good insulator. College Physics for AP Courses 2015-08-12T00:00:00Z Topological insulators, for instance, conduct electricity on their surface while blocking it from flowing through their bulk. Tomorrow’s industries: from OLEDs to nanomaterials 2019-12-10T05:00:00Z PC Matthew Hart listed barbed wire and "fence insulators" from the concentration camp on the website. PC dismissed for Auschwitz eBay sales 2019-11-26T05:00:00Z Conant Metal & Light is a feast for the eyes — dazzling lighting, decorative metalwork and art made from repurposed objects, like canning jars, wrought-iron ice tongs and telephone pole insulators. You’re going where? Burlington 2019-11-13T05:00:00Z An ordered arrangement of magnetic moments in a material normally prevents the formation of another kind of electronic order associated with an exotic state of matter known as a topological insulator. Magnetic and topological order united in a crystal 2019-12-17T05:00:00Z The low conductivity of air makes fur a very good lightweight insulator. College Physics for AP Courses 2015-08-12T00:00:00Z Edison then patrolled the power lines in the area and replaced three insulator strings on the initial affected circuit and cleaned insulators at multiple towers while the line was de-energized. Edison offers new details about power circuit problems before the Saddleridge fire 2019-11-07T05:00:00Z The Herald Journal reported Monday that Hyrum Light & Power believes the insulators were damaged by someone shooting at them. Utah power company uses outage to replace damaged insulators 2019-10-22T04:00:00Z After the initial success of quantum theory in describing ordinary conductors, insulators and semiconductors, there had been countless attempts to explain superconductors and all had failed. J. Robert Schrieffer (1931–2019) 2019-10-07T04:00:00Z Topological insulators have an electrically insulating interior, but a conducting surface. Magnetic and topological order united in a crystal 2019-12-17T05:00:00Z This understanding of friction is helpful when considering properties of conductors and insulators and the transfer of charge by conduction. College Physics for AP Courses 2015-08-12T00:00:00Z Hydrogen is an electrical insulator at ambient conditions, but becomes a metal under extreme compression3 — a state that could, for example, help to generate Jupiter’s magnetic field. X-rays glimpse solid hydrogen’s structure 2019-09-24T04:00:00Z Authorities say the insulators cost about $250 each, not including labor fees. Utah power company uses outage to replace damaged insulators 2019-10-22T04:00:00Z “Most people are not outraged or upset at this issue any more than they were about SafeTrack or repeated issues with arcing insulators,” Reusch said. It’s been 4 years, and the chiller system for Farragut North and Dupont Circle Metro stations still isn’t fixed 2019-08-20T04:00:00Z This Dirac cone is the distinguishing feature of the surface of a topological insulator, and its disappearance is a sign that the surface has been converted from conducting to insulating. Magnetic and topological order united in a crystal 2019-12-17T05:00:00Z Electrons and ions in insulators are bound in the structure and cannot move easily—as much as 1023 times more slowly than in conductors. College Physics for AP Courses 2015-08-12T00:00:00Z In simple metals and insulators, electrons occupy well-defined energy levels. New Research Reveals how Electrons Interact in Twisted Graphene 2019-07-31T04:00:00Z Authorities say it takes workers about 3 hours to replace the insulators on the live 46,000-volt line. Utah power company uses outage to replace damaged insulators 2019-10-22T04:00:00Z In particular, the teams found that the density of states at low energies was suppressed for electron concentrations for which an insulator was previously identified2. Spectroscopy of graphene with a magic twist 2019-07-30T04:00:00Z Manganese bismuth telluride can be viewed as a stack of magnetic manganese telluride layers that are separated by layers of a benchmark topological insulator, bismuth telluride7. Magnetic and topological order united in a crystal 2019-12-17T05:00:00Z Pure water and dry table salt are insulators, for example, whereas molten salt and salty water are conductors. College Physics for AP Courses 2015-08-12T00:00:00Z This material, which is more than 97% air by volume, is used widely as an insulator here on Earth and beyond. Silica Blankets Could Make Mars Habitable 2019-07-15T04:00:00Z On the whole, the experience of the Trump Presidency does not inspire much confidence that wealth is a political insulator or purifier of motives. Tom Steyer, the Democrats’ Billionaire for the People? 2019-07-14T04:00:00Z Topological insulators are strange materials with insulated interiors but conductive surfaces. Quirky Quantum Tunneling Observed 2019-07-09T04:00:00Z The conducting surfaces of the topological insulator are susceptible to externally applied or intrinsic magnetic fields, because such fields break time-reversal symmetry. Magnetic and topological order united in a crystal 2019-12-17T05:00:00Z That is, selenium is an insulator when in the dark and a conductor when exposed to light. College Physics for AP Courses 2015-08-12T00:00:00Z A similar effect in 3D systems allows some materials called topological insulators to be — despite their names — perfect conductors on their outer edges while the bulk of the material is insulating. Strange topological materials are popping up everywhere physicists look 2019-07-02T04:00:00Z The list encompasses single-element materials as well as compounds, and spans the full range of electrical properties, from metallic conductors to semiconductors and insulators. How to make the thinnest possible free-standing sheets of perovskite materials 2019-06-04T04:00:00Z They were looking for signs that samarium hexaboride exhibits quantum behavior, an important aspect of proving that a material is, indeed, a topological insulator. Quirky Quantum Tunneling Observed 2019-07-09T04:00:00Z Steps on the surface of an antiferromagnetic topological insulator produce the same perfectly conducting edge channels as in the QAHE. Magnetic and topological order united in a crystal 2019-12-17T05:00:00Z The sphere can be a conductor or insulator but must be connected to ground. College Physics for AP Courses 2015-08-12T00:00:00Z As the field varied, they recorded electrons moving at the edge of the device, as expected in topological insulators. Strange topological materials are popping up everywhere physicists look 2019-07-02T04:00:00Z It says that copper should be an electrical conductor but rubber an insulator. A little-known quantum mechanics theorem explains the nature of all reality 2019-05-19T04:00:00Z This work established the conceptual framework that would eventually allow topological insulators to be discovered. David J. Thouless (1934-2019) 2019-05-01T04:00:00Z Consider adding such antiferromagnetism to a topological insulator. Magnetic and topological order united in a crystal 2019-12-17T05:00:00Z The sphere can be a conductor or insulator but must be already charged. College Physics for AP Courses 2015-08-12T00:00:00Z To avoid accidentally turning on cancer-causing genes as previous gene therapies did, the researchers built “insulators” into the virus so that neighboring genes wouldn’t be affected when the virus made its insertion into the DNA. Gene therapy cures infants with ‘bubble boy’ immune disease 2019-04-17T04:00:00Z Magnetism that converts a metal to an insulator. Beware of plausible predictions of fantasy materials 2019-02-26T05:00:00Z Like all insulators, these materials do not conduct electricity in bulk, but do so at their surfaces — because of quantum-mechanical phenomena best understood using tools from the mathematical field of topology. Shoucheng Zhang (1963–2018) 2019-01-22T05:00:00Z That twist radically changed the bilayer’s properties — turning it first into an insulator and then, with the application of a stronger electric field, into a superconductor. How ‘magic angle’ graphene is stirring up physics 2019-01-01T05:00:00Z A combination of material and thickness is often manipulated to develop good insulators—the smaller the conductivity k and the larger the thickness d , the better. College Physics for AP Courses 2015-08-12T00:00:00Z Zhang, who was at Stanford University in California, was among the first physicists to predict that some materials known to be insulators should be able to conduct electricity on their outer surface. Imprisoned academics, China’s Moon lander and AI moral code 2018-12-11T05:00:00Z The surface of a topological insulator, as seen under a scanning tunnelling microscope.Credit: Beware of plausible predictions of fantasy materials 2019-02-26T05:00:00Z The topological insulator had near-perfect conduction at its surface edges thanks to a phenomenon called the quantum spin Hall effect. Shoucheng Zhang (1963–2018) 2019-01-22T05:00:00Z In those systems, the zero-resistance state often borders a ‘Mott’ insulator — in which no current flows, despite the presence of free electrons, because mutual repulsion between the particles pins them in place. How ‘magic angle’ graphene is stirring up physics 2019-01-01T05:00:00Z The ratio of d / k will thus be large for a good insulator. College Physics for AP Courses 2015-08-12T00:00:00Z These features are described by the mathematics of topology, and the materials are dubbed topological insulators. Imprisoned academics, China’s Moon lander and AI moral code 2018-12-11T05:00:00Z Topological insulators, for example, do not conduct electricity in their bulk. Beware of plausible predictions of fantasy materials 2019-02-26T05:00:00Z He was widely expected to share a Nobel Prize in Physics for his role in the prediction and discovery of the first topological insulator, made of bilayers of the semiconductors cadmium telluride and mercury telluride. Shoucheng Zhang (1963–2018) 2019-01-22T05:00:00Z Zhang was among the first to describe ‘topological insulators’ — materials long known to be insulators yet which are able to conduct electricity on their outer surface. Daily briefing: Subterranean biosphere contains billions of tonnes of life 2018-12-10T05:00:00Z Because the cork is an effective insulator, most of the heat transfer will occur through the sides of the containers. College Physics for AP Courses 2015-08-12T00:00:00Z Its inventors intended to use Bakelite as an insulator for electrical wiring, but quickly realised its near-limitless potential, advertising it as the “material of a thousand uses”. The plastic backlash: what's behind our sudden rage – and will it make a difference? 2018-11-13T05:00:00Z In his 18th century research on the fundamental nature of electricity, Benjamin Franklin found that there are two kinds of materials: conductors, in which electric charges flow freely, and insulators, in which charges are immobile. Pushing the Boundaries in Quantum Electronics 2018-11-03T04:00:00Z Shoucheng Zhang’s pioneering work helped to launch a new branch of physics devoted to a class of materials called topological insulators. Shoucheng Zhang (1963–2018) 2019-01-22T05:00:00Z Charles Kane and Eugene Mele at the University of Pennsylvania in Philadelphia won the fundamental-physics prize for their work predicting the existence of a type of exotic material known as a topological insulator. Medical chimps’ retirement, Nobel laureates’ Brexit warning and science mega-prizes 2018-10-23T04:00:00Z Why is ceramic, with a conductivity less than that of a metal but greater than that of a good insulator, an ideal choice for the stove top? College Physics for AP Courses 2015-08-12T00:00:00Z The interiors of these materials are electrical insulators, yet their surfaces conduct electricity. Revolutionary microscopy technique nets most lucrative prize in science 2018-10-16T04:00:00Z In this process, the properties of the material will also smoothly change, but as long as the energy gap remains nonzero it will remain an insulator at each step along the way. Pushing the Boundaries in Quantum Electronics 2018-11-03T04:00:00Z Conceptually, he played a leading part in mapping a taxonomy of the various ‘species’ of topological insulator. Shoucheng Zhang (1963–2018) 2019-01-22T05:00:00Z The authors used a thin, flat sample of single-crystal haematite, α-Fe2O3 — an electrical insulator that is the most common antiferromagnetic iron oxide. Spins travel far in an antiferromagnet 2018-09-11T04:00:00Z Shares in Zhongshi Technology Ltd., a Beijing-based maker of insulators for telecoms, medical and automotive equipment, are up 400 percent this year. Tariff fight adds to China’s economic challenges 2018-09-03T04:00:00Z Here’s why you shouldn’t: Cork is exceptionally quiet underfoot, environmentally friendly, comfortable and serves as a natural thermal insulator. Unique options for eco-friendly building materials | Produced by Advertising Publications 2018-08-24T04:00:00Z When a topological insulator contacts a conventional insulator, the interface between them is inevitably conducting. Pushing the Boundaries in Quantum Electronics 2018-11-03T04:00:00Z He identified a key feature of electronic structure — band inversion — that is central to transforming normal insulators into topological ones under certain conditions. Shoucheng Zhang (1963–2018) 2019-01-22T05:00:00Z Figure 1 | Spin transport in an antiferromagnetic insulator. Spins travel far in an antiferromagnet 2018-09-11T04:00:00Z The molecules remain intact, and this state of liquid hydrogen is an insulator — a poor conductor of electricity. Settling Arguments About Hydrogen With 168 Giant Lasers 2018-08-16T04:00:00Z The difference between conductors and insulators is rooted in the states that are available to the electrons in these materials. Topological states engineered in narrow strips of graphene 2018-08-07T04:00:00Z What the interior of the topological insulator does is to effectively create a conductor that is split into spatially separate parts that move in opposite directions. Pushing the Boundaries in Quantum Electronics 2018-11-03T04:00:00Z ‘Emergent Majorana modes’ are predicted to occur at the edges of topological superconductors — cousins of topological insulators. Shoucheng Zhang (1963–2018) 2019-01-22T05:00:00Z First, the authors demonstrated spin transport in an antiferromagnetic insulator over a relatively long distance — tens of micrometres at a temperature of 200 kelvin. Spins travel far in an antiferromagnet 2018-09-11T04:00:00Z The interference patterns, modelled by a computer, formed by quantum waves in a material known as a topological insulator.Credit: Thousands of exotic ‘topological’ materials discovered through sweeping search 2018-08-07T04:00:00Z By contrast, the electrons in insulators are effectively localized, and do not conduct electricity unless they are provided with sufficient energy to overcome an energy gap. Topological states engineered in narrow strips of graphene 2018-08-07T04:00:00Z While applications remain in the future, there are medium and long-term goals for developing useful devices using topological insulators. Pushing the Boundaries in Quantum Electronics 2018-11-03T04:00:00Z A well-studied example is the topological insulator, which is an electrical insulator in its interior, but conducts electricity on its surface through electronic waves called topological surface states. Reflection forbidden and refraction reversed in an artificial crystal 2018-07-31T04:00:00Z Each wall consists of two layers of the insulator polyurethane, with a space in-between which is filled with cement. Is 3D printing the future of social housing? 2018-07-05T04:00:00Z Topological insulators are strange because they consist mostly of insulating material, yet their surfaces are great conductors. Thousands of exotic ‘topological’ materials discovered through sweeping search 2018-08-07T04:00:00Z This understanding of conductors and insulators was an early triumph for the application of quantum theory to materials. Topological states engineered in narrow strips of graphene 2018-08-07T04:00:00Z A second, more speculative, but also more ambitious, proposal is to use topological insulators and related materials to construct a kind of quantum computer. Pushing the Boundaries in Quantum Electronics 2018-11-03T04:00:00Z They even complained that Metro did not consult them on its fix for the exploding insulator. ‘Ongoing dumpster fire’: How close the federal government came to shutting down Metro 2018-06-23T04:00:00Z The shape of the beeswax mimics the shape of high-voltage ceramic insulators Silva observed on Japanese power lines. Eight ceramic octopus traps? Why Daniel Silva's show at Baert Gallery has us hooked 2018-06-23T04:00:00Z After all, the behavior of the electrons in a material determines its properties as a whole—whether the substance is a metal, an insulator, a magnet, or something else. What Are the Limits of Manipulating Nature? 2018-05-25T04:00:00Z Frequently, defects induce a large internal conductivity, even if the material is nominally a topological insulator. Topological states engineered in narrow strips of graphene 2018-08-07T04:00:00Z Hedgehog spin texture and Berry’s phase tuning in a magnetic topological insulator. Massive Dirac fermions in a ferromagnetic kagome metal 2018-03-18T04:00:00Z A new tunnel to permanently fix the leaky western segment of the Red Line, an area prone to arcing insulators, isn’t in the plans either. Here’s how Metro says it would spend $15.5 billion over a decade 2018-03-17T04:00:00Z Experimental observation of the quantum anomalous Hall effect in a magnetic topological insulator. A quantized microwave quadrupole insulator with topologically protected corner states 2018-03-13T04:00:00Z The original incorrectly stated David Hsieh of the California Institute of Technology creates photoinduced superconductivity in a material called a Mott insulator that becomes insulating at very cold temperatures. What Are the Limits of Manipulating Nature? 2018-05-25T04:00:00Z Polarization-driven topological insulator transition in a GaN/InN/GaN quantum well. GaN/NbN epitaxial semiconductor/superconductor heterostructures 2018-03-06T05:00:00Z Mott insulators are a strongly correlated, non-conducting form of matter. Novel electronic states seen in graphene 2018-03-04T05:00:00Z He said heavy cardboard was the best insulator between the chill of the bare ground and his body. Man says sobriety, serving others, illuminates a road ahead 2018-01-02T05:00:00Z Our results provide conclusive evidence of a unique form of robustness against disorder and deformation, which is characteristic of higher-order topological insulators. A quantized microwave quadrupole insulator with topologically protected corner states 2018-03-13T04:00:00Z And then, two days before SafeTrack’s official June 25 end date, two arcing insulators and a Red Line meltdown struck in the middle of the morning commute. Perspective | From a urine attack to an Oval Office meeting, Metro’s most notable moments of 2017 2017-12-30T05:00:00Z The work wasn’t limited to ties, however: Reports on the second and third surges reflected work on insulators, grout pads, fasteners, studs and power cables, among other components. SafeTrack surge areas require further track work, internal review finds 2017-12-29T05:00:00Z The authors interpret one of these states2 as a correlated Mott insulator, a non-conducting state produced by strong repulsive interactions between electrons. Novel electronic states seen in graphene 2018-03-04T05:00:00Z These singularities are mathematical holes and also arise in topological insulators. Waves that drive global weather patterns finally explained, thanks to inspiration from bagel-shaped quantum matter 2017-10-05T04:00:00Z W.A.B. guided the topological insulator design and performed the theoretical calculations. A quantized microwave quadrupole insulator with topologically protected corner states 2018-03-13T04:00:00Z When pressed into a chewy scoop, the rice serves as an excellent base and insulator for almost everything on the menu, particularly Esaan’s lengthy list of salads. Review | Esaan serves a delicious lesson in Northeastern Thai cuisine 2017-09-26T04:00:00Z “It’s going to spread to soft crafts like painters and insulators.” Harvey may pinch some Gulf Coast refining, chemical projects 2017-09-08T04:00:00Z In order for nanoscale electronics to progress, it requires both conductors and insulators. New Nanowire Is World's Worst Electrical Conductor 2017-08-07T04:00:00Z Wei Li, a physicist at Tsinghua University in Beijing, says that Bernevig’s method is “definitely a more efficient way” to search for new topological insulators. The strange topology that is reshaping physics 2017-07-18T04:00:00Z He was one of the first scientists to use lasers to do research on semiconductors and insulators. Elias Burstein, Pioneer in Semiconductors, Dies at 99 2017-06-25T04:00:00Z The traditional design incorporates principles of physics and thermodynamics to create an optimal shelter, and it turns out snow is actually an excellent insulator. Karen Handel, Uber, Sean Spicer: Your Wednesday Evening Briefing 2017-06-21T04:00:00Z “It’s going to spread to soft crafts like painters and insulators.” Harvey may pinch some Gulf Coast refining, chemical projects 2017-09-08T04:00:00Z Local news outlets report the testing in Minden until Friday is for polychlorinated biphenyls, which were commonly used as an electrical equipment insulator. EPA testing for “possible” carcinogen PCBs in West Virginia 2017-06-14T04:00:00Z Ask him about arcing insulators, and you’ll get a blank stare. This guy wrote a song for every Metro station. All 91 of them. 2017-06-12T04:00:00Z The Isakson Prize citation referred to “his pioneering work on the optical properties of semiconductors and insulators” as well as his studies of Raman scattering. Elias Burstein, Pioneer in Semiconductors, Dies at 99 2017-06-25T04:00:00Z He’s working now in an apprenticeship program with an insulators’ union. St. Mary’s pretrial program earns praise, cuts incarceration 2017-06-03T04:00:00Z SAT Signs, bottles, insulators, electrical artifacts swap/trade/appraisal, 8:30 a.m. Community calendar: festivals, fairs and more 2017-03-23T04:00:00Z The carbon-covered paper is then placed over floating white polystyrene foam and a thermal insulator that helps concentrate the solar heat onto the carbon layer. University’s solar-powered still improves ancient water cleaning technology 2017-02-21T05:00:00Z Carbon dioxide acts like an insulator in the atmosphere, reflecting heat back to Earth, resulting in changes in the climate system. First Wells Fargo, next Seattle’s pension fund? Activists target other investments over Dakota Access Pipeline 2017-02-14T05:00:00Z The stones are one of nature's best heat conductors and electrical insulators; when used in the production of semiconductors, they keep the silicon from overheating. Forget the ring: Lab-grown diamonds are a scientist’s best friend 2017-02-13T05:00:00Z Dry air is an electrical insulator, whereas moist air acts as a conductor. Tiny sparks are all around us: How to harness, benefit from static electricity 2017-01-13T05:00:00Z My mother offers the best example of the mall’s effectiveness as an insulator. 'It's not just shopping, right?': life in the shadow of North America's biggest mall 2016-12-14T05:00:00Z Zhenguo Huang at the University of Wollongong in Australia and his colleagues used optical microscopes and spectroscopy to study how well films of the insulator boron nitride protect copper from corrosion. Materials science: Atom-thick coats for copper : Nature : Nature Research 2016-11-29T05:00:00Z In one instance, inspectors attempted to investigate an insulator explosion at Capitol South station — an incident that was recorded on video and widely circulated. After a year of FTA oversight of Metro, questions about whether safety has improved 2016-11-12T05:00:00Z There were one-off citations: a missing bolt here, a loose insulator anchor there. Federal inspectors report a mixed bag on Metro SafeTrack improvements 2016-10-01T04:00:00Z A team of engineers has been testing electrical grid components including porcelain insulators and supporting structures for electrical switches in substations. Who Is Guarding the Grid? 2016-09-23T04:00:00Z That line of work belongs in the fast-emerging field of topological insulators. China-only science prize honours pathologist and experimental physicist 2016-09-18T04:00:00Z “Three grout pads and corresponding insulators were replaced on Track #1 along the platform,” the inspector wrote. Federal reports reveal concerns with quality of Metro’s SafeTrack repairs 2016-09-07T04:00:00Z That’s nearly the top end of the down quality scale, which rates the natural insulator’s loft — or ability to trap the body heat that keeps you warm. The best outdoor gear for camping, hiking, and exploring nature 2016-08-23T04:00:00Z She found that a top layer of bubble wrap acted as an excellent insulator. Solar still made of bubble wrap could purify water for the poor 2016-08-22T04:00:00Z Their mandate: Install hundreds of new wooden crossties, introduce new insulators and fasteners; revamp thousands of feet of rail; and inspect dozens of power cables and expansion cables. Back at it again: Metro returns to Orange and Silver for SafeTrack Surge No. 5 2016-07-19T04:00:00Z Faulty insulators are another common cause of track fires. Here’s some of the infrastructure Metro will be fixing during SafeTrack 2016-06-04T04:00:00Z The engineering feat was made possible because gutta-percha proved to be the ideal insulator for copper electric wire. The Forgotten Material That Changed the World 2016-05-30T04:00:00Z The letter was signed by leaders of the operating engineers, plumbers, elevator constructors, roofers, laborers, plasterers and heat and frost insulators. Rift Between Labor and Environmentalists Threatens Democratic Turnout Plan 2016-05-16T04:00:00Z Those incidents included last week’s arcing insulator explosion at Federal Center SW that sprayed “fiery metal and ceramic projectiles” onto the station platform. Federal safety officials demand immediate fixes on Red, Orange, Silver, Blue lines 2016-05-11T04:00:00Z Dramatic video showed a fireball erupting at Federal Center SW, where an arcing insulator appeared to be the culprit of a morning fire. Arcing fire prompted shutdown of Metro’s Federal Center SW station 2016-05-05T04:00:00Z Metro tweeted that the closure was necessary to replace the third-rail insulator at Federal Center. DC subway halts service on piece of 3 lines because of smoke 2016-05-05T04:00:00Z Wednesday’s arcing insulator caused about an hour of single-tracking in the Friendship Heights area until the problem was resolved, Stessel said. Electrical problems cause another horrible commute for Metro Red Line riders 2016-04-27T04:00:00Z Saturday, appeared to involve an insulator, and Metro said it was “possibly the result of electrical arcing.” Federal officials investigating Saturday’s Metro track fire 2016-04-24T04:00:00Z The Cozy works as an insulator, trapping the heat in a radiator, so it doesn’t escape into a hot room. Controlling Steam Radiators 2016-03-11T05:00:00Z Metro said older, porcelain insulators prone to fire would be replaced by a newer fiberglass model. Arcing fire prompted shutdown of Metro’s Federal Center SW station 2016-05-05T04:00:00Z District of Columbia fire department spokesman Doug Buchanan told The Washington Post that the insulator was arcing. DC subway halts service on piece of 3 lines because of smoke 2016-05-05T04:00:00Z Earlier Wednesday, before the arcing insulator problems, a “partial power outage” at the Red Line’s Medical Center station idled escalators and left some commuters stuck in an elevator, the transit agency said. Electrical problems cause another horrible commute for Metro Red Line riders 2016-04-27T04:00:00Z Fire and Emergency Medical Services Department, was centered on an insulator on fire at the platform. Federal officials investigating Saturday’s Metro track fire 2016-04-24T04:00:00Z “But there will be temperature effects as carbon dioxide is a major insulator of heat,” Marburger said. Indiana Dunes research looks at climate impact on syrup 2016-02-19T05:00:00Z Snow is an excellent insulator, and the temperature is rarely much below freezing under a blanket of just a few inches. The Christmas Fern, a Cold-Weather Frond 2015-12-25T05:00:00Z Normally, ice is a good insulator protecting lakes from atmospheric heating,” Leavitt says. Earth’s lakes are warming faster than its air 2015-12-16T05:00:00Z Dissipating heat is complex in birds because feathers are such effective insulators. How hummingbirds avoid overheating - BBC News 2015-12-15T05:00:00Z That is because such advances would allow engineers to eliminate the electronic controllers, armour plating, cell insulators and cooling systems that today's electric cars need to protect the batteries. Lithium batteries: To the limits of lithium : Nature : Nature Publishing Group 2015-10-27T04:00:00Z When no pressure is applied, the rubber, which is an insulator, prevents current from flowing between the two electrodes. Sensors may soon give prosthetics a lifelike sense of touch 2015-10-15T04:00:00Z The hollow interior of the hair holds air inside, making it a better insulator. Nebraska couple maintains 13-acre alpaca farm 2015-10-03T04:00:00Z Green roofs also act as insulators and reduce energy costs associated with cooling. How cities can beat the heat 2015-08-25T04:00:00Z But rather than getting rid of the pressure, Norman predicts that researchers will do the opposite and look for new superconductors by squeezing other insulators. Stinky hydrogen sulfide smashes superconductivity record 2015-08-17T04:00:00Z Among its unusual elements are old Staten Island Ferry searchlights and electrical insulators from the 1890s. Happy trays: A renovated Clifton's cafeteria is set to reopen after nearly four years 2015-08-15T04:00:00Z Good electrical conductors usually conduct heat, too, whereas electrical insulators are generally thermal insulators. Hot stuff 2015-07-30T04:00:00Z “After it stopped, we started gathering the old insulators. I think it’s kind of pretty.” Couple combines imagination, ingenuity for unique pieces 2015-07-23T04:00:00Z There is no better insulator on the planet in terms of warmth to weight – than down. TrackMyDown.com Adds Transparency To The Down Industry 2015-07-16T04:00:00Z While the cheerleaders may double as trainee pipe fitters, electricians and insulators, on weekends they’re no different from college students anywhere as they shout for the Apprentice School Builders on the sidelines. A New Look at Apprenticeships as a Path to the Middle Class 2015-07-13T04:00:00Z It can’t do anything to compensate for the delays that occur when trains break down, or switches malfunction, or insulators begin to spark. A question from riders to Metro’s bosses: What does success look like? 2015-07-09T04:00:00Z The insulators and other contractors will contribute something, because working with Green Mountain reduces the cost of acquiring new customers. Solar Power for Everyone 2015-06-22T04:00:00Z Their experiment indicated that neon would remain an insulator even in the extreme heat and pressure of Saturn’s core, so it would refuse to interact with the surrounding hydrogen. Saturn's Core Might Be Cloaked in a Neon Shield 2015-06-18T04:00:00Z Troup said that Monday’s incident involved eight insulators, which are designed to contain electricity that powers the third rail. Metro resumes old strategy to prevent more smoke incidents in tunnels 2015-05-14T04:00:00Z The short story is that it successfully simulated how atoms transition between acting as superfluids or insulators. Analog Simulators Could Be Shortcut to Universal Quantum Computers 2015-05-06T04:00:00Z The electric fields are strong, but are not sufficient in themselves to convert air from an electric insulator to a conductor. Cosmic rays reveal the secrets of thunderstorms 2015-04-22T04:00:00Z They resemble a bit the drawer pulls and pickle forks and electrical insulators he liked to collect: evocative, beautifully made artifacts from a bygone age. The People You Meet 2015-04-20T04:00:00Z Northern ballparks are used to dealing with snow – and, in fact, groundskeepers welcome it because it can serve as an insulator, keeping the roots of the grass warm enough that they don’t freeze. Opening Damp: Long, wet winter challenges MLB’s groundskeepers 2015-03-18T04:00:00Z Repelling one another, the electrons get stuck in a one-to-a-copper traffic jam called a Mott insulator state. A step closer to explaining high-temperature superconductivity? 2015-02-27T05:00:00Z Sparks emanating from an insulator because of damaged or deteriorated insulation are common in the subway system. Metrorail problems hamper morning commute 2015-02-23T05:00:00Z The incident comes just one month after an arcing insulator in a tunnel near the L'Enfant Plaza station filled with smoke, killing one woman and sending 84 people to area hospitals. Smoke forces evacuation of Washington subway train 2015-02-21T05:00:00Z The pits are also separated from the surrounding parts of the face by a layer of dense connective tissue that serves as a thermal insulator. How We Sense the Heat of Chili Peppers and the Cool of Menthol [Excerpt] 2015-02-04T05:00:00Z The raptors also have a habit of stuffing their burrow with dung, which acts as a good insulator and may attract insects, which they also eat, little living snacks. In Honor Of the Super Bowl, The 16 Most Superb Owls of All Time “The bees on the outside of the cluster act as insulators,” he said, “while the innermost bees generate the heat. They continually rotate their position, alternating roles as heat producer and recipient.” The Bee Solution to Winter 2015-01-26T05:00:00Z Electricity could escape from deteriorated cables or from the third rail if the insulators keeping the rail off the ground are faulty. Investigation begins into deadly Metro incident that killed 1, injured dozens 2015-01-13T05:00:00Z The smoke that filled the car was probably abetted by an electrical phenomenon known as arcing, caused when the insulators on the third rail are somehow compromised through deterioration or debris, investigators said. On Washington Metro, a Death Is Rare but Problems Are Almost Daily 2015-01-13T05:00:00Z But when the particles are compressed within a few nanometers of one another, the electrons burrow through the silicone through a process called quantum tunneling, turning the composite from an insulator into a conductor. An armored battery you can swallow 2014-11-03T05:00:00Z In November and December 1976, a British researcher spent 32 days in the hospital's plastic insulator. Deadly disease v untested treatment 2014-09-06T04:00:00Z Unlike other types of insulators, mechanical insulation workers require greater specialty given the challenges of applying insulation to pipes and ducts in all types of buildings. America’s Fastest Growing Jobs 2014-08-30T04:00:00Z Sanders, who is not involved in the investigation, said the third rail, which carries the electricity that powers trains, is mounted on “insulators” that keep the rail from making contact with the ground. Investigation begins into deadly Metro incident that killed 1, injured dozens 2015-01-13T05:00:00Z Crews on the Red Line will work on track insulators and the railroad ties and fasteners between Takoma and Forest Glen. Three lawyers recommended for D.C. Superior Court judgeships And another supposed insulator against the worst of the blues, plenty of work. Dick Cavett: Robin Williams Won't Be the Last Suicidal Star 2014-08-12T04:00:00Z Mr. Supley, whose mother collects glass insulators from railroad telephone lines and whose father is into racecar paraphernalia and vintage bikes, will also screen a home movie about his clocks made when he was 12. In Brooklyn, a Collection of Collections 2014-07-16T04:00:00Z Meanwhile, mechanical insulators are expected to benefit from an increased focus on environmental sustainability. America’s Fastest Growing Jobs 2014-08-30T04:00:00Z Such an electrical malfunction could be related to how well the cables, insulators and third rail have been maintained, Sanders said. Investigation begins into deadly Metro incident that killed 1, injured dozens 2015-01-13T05:00:00Z Between West Falls Church and Vienna, crews on the Orange Line will work on track insulators and the railroad ties and fasteners. Three lawyers recommended for D.C. Superior Court judgeships "Fat appears to function as an insulator, and interferes with heat dissipation," explained Shirazian, who was not involved in the study. Losing Weight May Ease Hot Flashes, Study Finds 2014-07-10T04:00:00Z Metro spokeswoman Caroline Laurin said rainwater apparently caused the arcing of an insulator, which in turn prompted delays for many Red Line riders. Thunderstorms disrupt the Washington area The air is a good insulator, keeping electrons from jumping back and equilibrating the electrostatic charges. Lightning linked to solar wind 2014-05-15T04:00:00Z On Monday, Mr. Kharkovsky, 75, a retired electrician from an old Soviet-era high-voltage insulator factory, tended his garden to the sounds of gunfire. In One Eastern City, Ukrainians Find Battle Hits Too Close to Home 2014-05-13T03:17:12Z We note that recent ab initio calculations for insulators in strong fields are interpreted in terms of the field-induced insulator to metal transition. Addendum: Optical-field-induced current in dielectrics 2014-03-19T18:22:43.387Z "At low temperatures, the oxide is an insulator. At high temperatures it's a metal. And in between it becomes this strange material," he said. New magnetic material discovered 2014-03-04T12:02:28Z The remaining phases are obtained as combinations of these two “topological paramagnets” and the topological band insulator. [Report] Classification of Interacting Electronic Topological Insulators in Three Dimensions 2014-02-06T19:26:22.476Z "These creatures are used to tropical weather. Water is an insulator," he said. Super Bowl crawfish boils may be put on ice by U.S. cold spell 2014-01-30T00:22:24Z So I agree with Orzel that the failure to find a theory of quantum gravity would not generally impact the search for a better topological insulator or DNA tweezer. Physics and fundamental laws: Necessary truth or misleading cacophony? 2014-01-22T22:48:08Z The material would be an example of a new class of materials called “topological insulators” that are highly conductive along a surface or edge, but insulating on their interior. Coordinates: Designing the Next Wave of Computer Chips 2014-01-09T22:41:11Z The process turns some metals, which readily conduct electricity, into insulators, which do not. The Big Squeeze 2013-12-16T22:28:17Z We prove that these eight phases form a complete list of all possible interacting topological insulators and discuss their experimental signatures. [Report] Classification of Interacting Electronic Topological Insulators in Three Dimensions 2014-02-06T19:26:22.476Z This crystalline layer would slow down the cooling, acting as an insulator for the deeper magma ocean. Early Earth Had Layered Lava Oceans 2013-11-06T20:15:00.373Z The specialised structure of their feathers acts as an insulator however to keep these dangerously low temperatures away from the penguins' skin. 10 heat secrets caught on camera 2013-10-02T14:40:25Z To destroy the metallic tubes the team first used an electric field to turn the semiconducting ones into insulators. A carbonic computer: Cylinder head 2013-09-26T15:05:58Z Stack two materials, even insulators, on top of one another and voilà: a dramatic drop in electrical resistance can emerge between them. Interface superconductivity found in single crystal 2013-09-25T17:20:25.733Z Combined with the previously known band insulators, these produce a total of eight topologically distinct phases. [Report] Classification of Interacting Electronic Topological Insulators in Three Dimensions 2014-02-06T19:26:22.476Z The backsheet gets the dirty but highly important job of protecting the working components of the module from the weather and serving as an electrical insulator for periods in excess of 25 years. Not All Solar Materials Are From China: Photovoltaic Backsheets by FLEXcon 2013-08-19T18:41:00Z You could think of mature oligodendrocytes as your brain’s electrical contractors: These glial cells sheath your neurons’ connective cables in the insulator protein myelin, which keeps synaptic signaling fast and efficient. A Secret Society of Cells Runs Your Brain 2013-06-24T22:45:05.087Z SF6 is a superb electrical insulator, and laboratories employed it not only to shield high-voltage lines and equipment, but also for uses like dampening sparks in certain experiments. Department of Energy’s Crusade Against Leaks of a Potent Greenhouse Gas Yields Results 2013-06-14T01:06:25Z The result is a bulk material that acts as topological insulator at room temperature. Exotic conductors from lab and nature 2013-03-13T18:20:28.630Z A fundamental open problem in condensed-matter physics is how the dichotomy between conventional and topological band insulators is modified in the presence of strong electron interactions. [Report] Classification of Interacting Electronic Topological Insulators in Three Dimensions 2014-02-06T19:26:22.476Z Samarium hexaboride might be the next star of materials science, following hints last year that it is a topological insulator — conducting electricity on its surface, but behaving as an insulator inside. New Year, New Science 2013-01-02T11:15:00.407Z When theorists proposed in 2005 that it should be possible to find materials that conduct electricity at the surface while the rest of the sample behaves as an insulator, physicists were intrigued. Exotic Quantum Effects Could Follow from Compound Now Confirmed to Conduct Only at Surface 2012-12-11T23:15:00.247Z In an insulator, things are slightly more complicated. Turning Pull Into Push? 2012-12-10T19:30:00Z But that is not true for topological insulators — exotic materials that conduct electricity only along their surfaces. Exotic conductors from lab and nature 2013-03-13T18:20:28.630Z It's mainly down to the pink phenolic foam insulation that is injected into the timber-house frame and combined with a thin membrane, while wood is also a good natural insulator in itself. Prefabs sprout as Britain embraces timber-frame housing 2012-11-12T16:29:41Z The north wall should have very few windows, since it never receives direct sunlight and windows are poor insulators. Green Blog: First Things First: An Efficient Abode 2012-11-08T13:07:22Z But topological insulators, as the materials were called, proved fiendishly difficult to make. Exotic Quantum Effects Could Follow from Compound Now Confirmed to Conduct Only at Surface 2012-12-11T23:15:00.247Z To see how this scenario works, consider the case in which just a point charge moves across the surface of an insulator. Turning Pull Into Push? 2012-12-10T19:30:00Z In theory, it is difficult to corrupt spin values in a topological insulator. Exotic conductors from lab and nature 2013-03-13T18:20:28.630Z Silicon is a type of material known as a "semiconductor" because, depending on conditions, it'll either act as a conductor that transmits electrons or as an insulator that blocks them. Moore's Law: The Rule That Really Matters in Tech 2012-10-16T15:15:04.937Z The metal blades are coated with a ceramic that acts as an insulator, helping keep the metal temperature down. Green Blog: Adapting Gas-Fired Power to a Greener Grid 2012-09-26T16:01:40Z Others have contented themselves with compounds that approximate topological insulators but still have a degree of internal conductivity. Exotic Quantum Effects Could Follow from Compound Now Confirmed to Conduct Only at Surface 2012-12-11T23:15:00.247Z DNaseI hypersensitivity is central to all defined classes of active cis-regulatory elements including enhancers, promoters, silencers, insulators and locus control regions. The accessible chromatin landscape of the human genome 2012-09-05T17:21:47.670Z The team cleaved off single crystalline sheets 0.7 millimetres wide and applied the standard test for a topological insulator: photoelectron spectroscopy. Exotic conductors from lab and nature 2013-03-13T18:20:28.630Z Snakes are already responsible for causing blackouts every few days by stretching from trees onto power poles and then completing an electrical circuit as they cross insulators between the poles and power wires. Why Brown Snakes Don't Mind the Gaps 2012-07-12T05:15:00Z Atoms hold one another at arm’s length and stay confined to specific spots on the grid—a phase of matter called a Mott insulator. Quantum Horse Races and Crystals of Light 2012-06-25T17:45:03.767Z Coleman and other theorists realized that the material’s behavior would make sense if it were a topological insulator. Exotic Quantum Effects Could Follow from Compound Now Confirmed to Conduct Only at Surface 2012-12-11T23:15:00.247Z One solution to the radiation issue might be a foil insulator sandwich with an inner layer of say aluminium, then 4 or 5 layers of depleted uranium foil. Thinking outside the box in space 2012-05-29T10:53:58Z Their results confirm that the electrons’ energy and momentum distribution matches predictions for a topological insulator. Exotic conductors from lab and nature 2013-03-13T18:20:28.630Z Second, the snow is an effective insulator that keeps the ground from freezing even more deeply during the winter than it does now. Alaskan North Slope Snow LiDAR Campaign: SnowSTAR-2012 2012-04-10T17:45:00.213Z A decade ago, Bloch and his colleagues gradually dialed up the intensity of their laser to watch the transition from superfluid to insulator. Quantum Horse Races and Crystals of Light 2012-06-25T17:45:03.767Z SmB6is an unusual topological insulator because the electrons in the outer shells of the samarium atoms interact with one another strongly, such that a coordinated motion emerges. Exotic Quantum Effects Could Follow from Compound Now Confirmed to Conduct Only at Surface 2012-12-11T23:15:00.247Z The result, was in Helmholtz’s words, to establish beyond doubt that 401 ordinary light consists of electrical vibrations in an all-pervading ether which possesses the properties of an insulator and of a magnetic medium. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 4 "Hero" to "Hindu Chronology" 2012-04-04T02:00:56.447Z Often the forest trees were pressed into service and insulators became the strange ornaments of the monarchs of the trackless wilderness. Blazing The Way True Stories, Songs and Sketches of Puget Sound 2012-04-03T02:00:30.677Z It is necessary to insulate the ends or terminals of the secondary heavily with hard rubber, because even dry wood is by far too poor an insulator for these currents of enormous potential differences. The inventions, researches and writings of Nikola Tesla With special reference to his work in polyphase currents and high potential lighting 2012-03-28T02:00:22.660Z They began with an insulator, dialed up the interaction energy, and watched the atoms start to self-organize. Quantum Horse Races and Crystals of Light 2012-06-25T17:45:03.767Z The myelin acts as an insulator and enhances communication at the cellular level. Your Teen s Brain: Driving without the Brakes 2012-03-15T17:45:03.763Z Top of their list is silicon dioxide, the ubiquitous insulator used in silicon chips. Production: Beyond sticky tape 2012-03-14T22:50:43.050Z It abutted the operating room, and it seemed to be a catch-all for half reels of wire, insulators and other material used in the telegraphic line. Ralph, the Train Dispatcher The Mystery of the Pay Car 2012-02-29T03:00:25.457Z Hence it was thought that a liquid insulator might be more suitable as a dielectric than air. The inventions, researches and writings of Nikola Tesla With special reference to his work in polyphase currents and high potential lighting 2012-03-28T02:00:22.660Z It has also been proposed to solidify it to make buttons, combs, brush-backs, electrical insulators and similar articles. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 9 "Dagupan" to "David" 2012-02-11T03:03:39.807Z An outage on Jan. 30 started when an electrical insulator failed and fell off the metal structure it was attached to. Exelon's Byron plant generating electricity after shutdown 2012-02-08T11:59:00Z The insulators degrade over time so upgrading them is one of the key factors in this.” Chicago News Cooperative: ComEd?s Smart Grid Begins With a Promise for the Future 2012-01-21T22:58:31Z The young railroader located the main service wire and began to pry it apart where there had been a splice on the insulator. Ralph, the Train Dispatcher The Mystery of the Pay Car 2012-02-29T03:00:25.457Z At this stage the streams seemingly pass with the greatest freedom through considerable thicknesses of insulators, and it is particularly interesting to study their behavior. The inventions, researches and writings of Nikola Tesla With special reference to his work in polyphase currents and high potential lighting 2012-03-28T02:00:22.660Z Because the wall is also an electrical insulator, the charge is not immediately discharged. Attraction with Static Electricity 2012-01-12T16:45:05.477Z Again, the coherence seems to take place in some cases when metallic particles are immersed in a liquid, or even in a solid, insulator. Hertzian Wave Wireless Telegraphy 2012-01-09T03:00:20.570Z As gate lengths shrink smaller than 14 nanometers, the silicon dioxide insulator used in conventional transistors fails to perform properly and is said to "leak" electrical charge. New 3D Transistors May Lead to Lighter Laptops 2011-12-28T15:37:00Z The presence of a layer of oil or of caked grease forming an insulator, injurious to induction, between the armature and the magnets; 4. Gas-Engines and Producer-Gas Plants A Practice Treatise Setting Forth the Principles of Gas-Engines and Producer Design, the Selection and Installation of an Engine, Conditions of Perfect Operation, Producer-Gas Engines and Their Possibilities, the Care of Gas-Engines and Producer-Gas Plants, with a Chapter on Volatile Hydrocarbon and Oil Engines 2011-12-28T03:00:31.087Z Since it is difficult to exclude the gas perfectly when solid insulators are used, it is necessary to resort to liquid dielectrics. The inventions, researches and writings of Nikola Tesla With special reference to his work in polyphase currents and high potential lighting 2012-03-28T02:00:22.660Z The zinc rod is inserted through a porcelain insulator. Hawkins Electrical Guide, Number One Questions, Answers, & Illustrations, A Progressive Course of Study for Engineers, Electricians, Students and Those Desiring to acquire a Working Knowledge of Electricity and its Applications 2011-12-24T03:07:54.823Z All such materials as sand, clay, chalk, etc., and most surface soils are fairly good insulators when very dry, but conduct in virtue of moisture present in them. Hertzian Wave Wireless Telegraphy 2012-01-09T03:00:20.570Z But past studies showed that these long organic chains act like a plastic insulator around a wire. Solar Cells Capture Lost Energy 2011-12-15T20:50:19Z The same end can be attained by slipping an ordinary rubber nipple over the porcelain insulator of any conventional plug and bringing up one end over the cable. Aviation Engines Design?Construction?Operation and Repair 2011-12-04T03:00:04.777Z For this reason principally it is necessary to employ liquid insulators, such as oils. The inventions, researches and writings of Nikola Tesla With special reference to his work in polyphase currents and high potential lighting 2012-03-28T02:00:22.660Z Some substances which are insulators in the solid state, become conductors when fused. Hawkins Electrical Guide, Number One Questions, Answers, & Illustrations, A Progressive Course of Study for Engineers, Electricians, Students and Those Desiring to acquire a Working Knowledge of Electricity and its Applications 2011-12-24T03:07:54.823Z “Water is a very good insulator and when a submarine is sitting on the seabed not moving for days it’s very difficult to identify,” he said. China’s Pacific Reach to Spur U.S. Spending on Anti-Sub Warfare 2011-11-24T06:58:45Z The condenser is thus formed by the earth as one plate, the elevated wires as the other, and the intervening air as the insulator. Marvels of Scientific Invention An Interesting Account in Non-technical Language of the Invention of Guns, Torpedoes, Submarine Mines, Up-to-date Smelting, Freezing, Colour Photography, and many other recent Discoveries of Science 2011-11-19T03:00:24.517Z Porcelain insulators are usually molded from high-grade clay and are approximately of the shapes desired by the designers of the plug. Aviation Engines Design?Construction?Operation and Repair 2011-12-04T03:00:04.777Z He shows that, at least with very rapidly alternating currents of high potential, the discharge may work through almost any practicable thickness of the best insulators, if air is present. The inventions, researches and writings of Nikola Tesla With special reference to his work in polyphase currents and high potential lighting 2012-03-28T02:00:22.660Z Insulators.—The term insulator is used in two ways: 1, as in insulating substance or medium, and 2, as a specially formed piece of some insulating material, such as glass, porcelain, etc. Hawkins Electrical Guide, Number One Questions, Answers, & Illustrations, A Progressive Course of Study for Engineers, Electricians, Students and Those Desiring to acquire a Working Knowledge of Electricity and its Applications 2011-12-24T03:07:54.823Z Even if you're never going to repair a lamp or make a chick brooder, you should know about conductors and insulators. Electricity for the 4-H Scientist Idaho Agricultural Extension Service Bulletin 396, June, 1962 2011-11-18T03:00:30.487Z In the Leyden jar the insulator is a glass jar, while the "plates" are coatings of tinfoil, one inside and the other outside. Marvels of Scientific Invention An Interesting Account in Non-technical Language of the Invention of Guns, Torpedoes, Submarine Mines, Up-to-date Smelting, Freezing, Colour Photography, and many other recent Discoveries of Science 2011-11-19T03:00:24.517Z The type shown at A employs a molded porcelain as an insulator, while that depicted at B uses a bushing of mica. Aviation Engines Design?Construction?Operation and Repair 2011-12-04T03:00:04.777Z This, it is thought, explains why the discharge through a bulb is established with much greater facility when an insulator, than when a conductor, is present. The inventions, researches and writings of Nikola Tesla With special reference to his work in polyphase currents and high potential lighting 2012-03-28T02:00:22.660Z Connect the ends of the secondary winding to fixed insulators and bend the ends so they are about 1⁄8 inch or less144 apart. Hawkins Electrical Guide, Number One Questions, Answers, & Illustrations, A Progressive Course of Study for Engineers, Electricians, Students and Those Desiring to acquire a Working Knowledge of Electricity and its Applications 2011-12-24T03:07:54.823Z Put hazard tags near the hazard but not directly on broken or frayed wires, insulators, fittings, or other wiring equipment. Electricity for the 4-H Scientist Idaho Agricultural Extension Service Bulletin 396, June, 1962 2011-11-18T03:00:30.487Z Now an air-gap—a gap that is filled with air, between two conductors—is a very strong insulator. Marvels of Scientific Invention An Interesting Account in Non-technical Language of the Invention of Guns, Torpedoes, Submarine Mines, Up-to-date Smelting, Freezing, Colour Photography, and many other recent Discoveries of Science 2011-11-19T03:00:24.517Z We find 220 candidate RNA structural families, and nearly a million elements overlapping potential promoter, enhancer and insulator regions. A high-resolution map of human evolutionary constraint using 29 mammals 2011-10-26T17:21:43.610Z A good insulator, and preferably one possessing a small specific inductive capacity, would afford a two-fold advantage. The inventions, researches and writings of Nikola Tesla With special reference to his work in polyphase currents and high potential lighting 2012-03-28T02:00:22.660Z From that time the classification of bodies into conductors and insulators has been observed. Hawkins Electrical Guide, Number One Questions, Answers, & Illustrations, A Progressive Course of Study for Engineers, Electricians, Students and Those Desiring to acquire a Working Knowledge of Electricity and its Applications 2011-12-24T03:07:54.823Z Rubber, most plastics, dry wood, oils and glass are some of the good insulators. Electricity for the 4-H Scientist Idaho Agricultural Extension Service Bulletin 396, June, 1962 2011-11-18T03:00:30.487Z This is two conductors, generally in the form of two plates with an insulator between them. Marvels of Scientific Invention An Interesting Account in Non-technical Language of the Invention of Guns, Torpedoes, Submarine Mines, Up-to-date Smelting, Freezing, Colour Photography, and many other recent Discoveries of Science 2011-11-19T03:00:24.517Z The stout wire halliard taking the for'ard end of the aerial had parted, and the two wires, spreaders, and insulators had fallen on the boat-deck. The Wireless Officer 2011-10-24T02:00:17.560Z Following out this idea, a number of different forms of dischargers in which a variety of such insulators, sometimes under great pressure, were employed, have been experimented upon. The inventions, researches and writings of Nikola Tesla With special reference to his work in polyphase currents and high potential lighting 2012-03-28T02:00:22.660Z The form may vary considerably, but in all cases it consists essentially of two insulated conductors, separated by an insulator and the working depends on the action of induction. Hawkins Electrical Guide, Number One Questions, Answers, & Illustrations, A Progressive Course of Study for Engineers, Electricians, Students and Those Desiring to acquire a Working Knowledge of Electricity and its Applications 2011-12-24T03:07:54.823Z Be sure the fiber insulator is in the shell. Electricity for the 4-H Scientist Idaho Agricultural Extension Service Bulletin 396, June, 1962 2011-11-18T03:00:30.487Z It is used extensively for fence posts, poles, tree nails, insulator pins and occasionally for lumber and fuel. Forest Trees of Illinois How to Know Them 2011-10-08T02:00:23.997Z The aerials had fortunately fallen clear of the funnel, and, although the for'ard insulators had been shattered, the drag of the wires had kept the after ones from being dashed against the main topmast. The Wireless Officer 2011-10-24T02:00:17.560Z Bare wires in the air with glass insulators at the poles are used for land telegraphy, but bare wires in the water could not be used, for ocean water will conduct electricity. The Story of Great Inventions 2011-10-05T02:00:16.353Z Bodies in which the electric current moves freely are called conductors, and those in which it does not move freely are called insulators. Hawkins Electrical Guide, Number One Questions, Answers, & Illustrations, A Progressive Course of Study for Engineers, Electricians, Students and Those Desiring to acquire a Working Knowledge of Electricity and its Applications 2011-12-24T03:07:54.823Z In a home studio in central Tehran, its walls and ceiling covered with insulators to avoid the music being heard outside the apartment, a four-piece rock band "Wednesday Call" is rehearsing. Tehran rocks, but only under ground 2011-09-14T14:05:51Z This second charge I affixed to the wires and insulators of the fallen post, so as to render repair more difficult. Caught by the Turks 2011-09-09T02:01:01.073Z The consortium’s technology builds its transistors inside a sliver of pure silicon, laid on top of an insulator, which in turn sits on top of a standard wafer, the substrate on which transistors are constructed. Transistors: Plugging the leaks 2011-08-17T19:17:49Z Smolyaninov and his colleagues create their analogues using plasmons, which are a two-dimensional form of light that moves along the interface between a metal and an insulator. Physicists Simulate the End of Time in a Maryland Lab 2011-07-29T00:15:00.487Z The best insulators become less efficient if their surface be moist, the electricity passing by the conducting power of the moisture. Hawkins Electrical Guide, Number One Questions, Answers, & Illustrations, A Progressive Course of Study for Engineers, Electricians, Students and Those Desiring to acquire a Working Knowledge of Electricity and its Applications 2011-12-24T03:07:54.823Z The insulator iodine becomes a metal, and sodium becomes insulating. Under Pressure, Sodium and Hydrogen May Be Used as a Superconductor 2011-06-15T13:44:00Z The insulators were dust, no doubt, and the damage would probably take some days to repair. Caught by the Turks 2011-09-09T02:01:01.073Z Prof. Thomson says: "The earth is generally found to be negatively electrified, and is insulated in its atmosphere, being in fact a conductor touched only by air—a strong insulator." The Universe a Vast Electric Organism 2011-06-09T02:00:22.450Z Demand for shellac began shooting up in the early twentieth century because it was an excellent electrical insulator. A Brief History of Plastic's Conquest of the World 2011-05-29T14:15:02.467Z Connect the ends or leads of the secondary winding to fixed insulators and bend the ends so they are from one-sixteenth to one-eighth inch apart. Hawkins Electrical Guide, Number One Questions, Answers, & Illustrations, A Progressive Course of Study for Engineers, Electricians, Students and Those Desiring to acquire a Working Knowledge of Electricity and its Applications 2011-12-24T03:07:54.823Z It is the insulator between the Physical Body and the Triune God, "a consuming fire." Manual of the Enumeration A Text Book on the Sciences of the Enumeration 2011-05-02T02:00:20.220Z From the top of the pole, the wires of the aerial were carried to the ground at some distance from the base, where they were attached to porcelain insulators. The Radio Boys' Search for the Inca's Treasure 2011-04-30T02:00:12.743Z On getting nearer, these lines resolved themselves into spots, and they proved to be the white insulators supporting the telegraph wires.” Are the Planets Inhabited? 2011-04-24T02:00:07.733Z If the electrified body is an insulator, the neutralization of the charges only takes place slowly, and consequently it may be some time before the particle is repelled. The New Gresham Encyclopedia Volume 4, Part 2: Ebert to Estremadura 2011-04-14T02:00:56.200Z “When we print the ink, the water leaves, and the nanoclusters in the inks turn into very high quality films and patterns which function as semi-conductors, insulators, or metals,” he continues. Green Electronic Technology 2011-02-22T19:54:00Z Under the action of the same or identical electric forces the intensity of this state in various insulators is determined by a quality of them called their dielectric constant, specific inductive capacity or inductivity. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" 2011-02-06T03:00:53.093Z The boys were forcing wedge-shaped wooden blocks or pegs, to which insulators were fastened, into cracks between stones of the turret floor. The Radio Boys' Search for the Inca's Treasure 2011-04-30T02:00:12.743Z If the current is a high-pressure External conductors. one, these insulators must be carefully tested, and are preferably of the pattern known as oil insulators. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 2 "Ehud" to "Electroscope" 2011-01-29T03:00:23.777Z Since the ebonite is an insulator, no general neutralization of the positive induced charge on the lower side of the metal disc can take place. The New Gresham Encyclopedia Volume 4, Part 2: Ebert to Estremadura 2011-04-14T02:00:56.200Z Among the difficulties to be encountered, was that of finding a perfect insulator. The Story of the Atlantic Telegraph 2010-12-29T03:00:29.577Z We must, however, assume that the charge Q is so small that it does not sensibly disturb the original electric field, and that the dielectric constant of the insulator is unity. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" 2011-02-06T03:00:53.093Z This oil can also serve as an electrical insulator. Engineers Show Photos of How a Specific Fluid Defies Normal Gravity 2010-12-15T16:31:00Z He found also that the dissipation of electricity along insulators was chiefly owing to adhering moisture, but in some measure also to a slight conducting power. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 2 "Ehud" to "Electroscope" 2011-01-29T03:00:23.777Z Recycled stuff also goes into engine fans and shrouds, splash shields and dash insulators. GM Gets Serious About Recycling 2010-09-01T20:10:00Z On land, where wires are carried on the tops of poles, the air itself is a sufficient insulator. The Story of the Atlantic Telegraph 2010-12-29T03:00:29.577Z This shows that some bodies are conductors and others non-conductors or insulators of electricity, and that bodies can be electrified by friction and impart their electric charge to other bodies. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" 2011-02-06T03:00:53.093Z This would generate a huge number of jobs for engineers, energy accountants, plumbers, loft insulators, builders, electricians and others. Green new deal can stop turbo-charged capitalism 2010-06-01T14:00:00Z At the time when Maxwell developed his theory the dielectric constants of only a few transparent insulators were known and these were for the most part measured with steady or unidirectional electromotive force. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 2 "Ehud" to "Electroscope" 2011-01-29T03:00:23.777Z A capacitor, super or otherwise, is made of two conductors separated by an insulator. 2010-02-11T10:38:00Z It has also come into use as an electric insulator. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 7 "Arundel, Thomas" to "Athens" The thinnest possible spherical shell of metal, such as a sphere of insulator coated with gold-leaf, behaves as a conductor for static charge just as if it were a sphere of solid metal. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" 2011-02-06T03:00:53.093Z Notable is the observation of needle deflections in circuits whose connecting wires are interrupted by pieces of graphite, manganese dioxide, various sulphur compounds, etc., materials which had previously been considered as insulators in galvanic circuits. The Earliest Electromagnetic Instruments The sole-plate serves to increase the electrical capacity of the upper plate when placed down upon the resin or excited insulator. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 2 "Ehud" to "Electroscope" 2011-01-29T03:00:23.777Z How big that charge is depends on the materials from which conductors and insulator are made, and also on their geometric configuration. 2010-02-11T10:38:00Z A small rectangular piece of porcelain, slate, mica, or other insulator, is wound with many turns of fine platinum wire. Wireless Transmission of Photographs Second Edition, Revised and Enlarged 1919 If the dielectric or separating insulator has a constant K, then the capacity becomes K times as great. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" 2011-02-06T03:00:53.093Z The subsoil must have acted as a monstrous insulator. A Republic Without a President and Other Stories Overhead conductors may consist of bare stranded copper cables carried on porcelain insulators mounted on stout iron or wooden poles. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 2 "Ehud" to "Electroscope" 2011-01-29T03:00:23.777Z On the 6th of February was commenced the planting, along the road to the corral, of posts, furnished with glass insulators, and intended to support the wire. Abandoned In excessively damp weather the index gives no definite arc, and it is necessary to resort to artificial heat in order to dry the insulators. The Eruption of Vesuvius in 1872 By placing metal plates on either side of a larger sheet of dielectric or insulator we can construct a condenser of relatively large capacity. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" 2011-02-06T03:00:53.093Z The walls are of concentric shells of copper and zinc with two of wood, between which is 'dead air,' an effective heat insulator. The Social Gangster In dielectric currents there is no continued movement of electricity, but merely a limited displacement through or in the mass of an insulator or dielectric. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 2 "Ehud" to "Electroscope" 2011-01-29T03:00:23.777Z He pointed to a string of porcelain insulators dangling at the end of twisted bits of wire in front of one of the paneless windows. Sea-Hounds They are, however, at times installed on insulators so designed as to prevent moisture from causing leakage between the cells. Cyclopedia of Telephony and Telegraphy, Vol. 2 A General Reference Work on Telephony, etc. etc. This means that it does not readily conduct electricity, or readily permit electric equilibrium to be established in it; or, in other words, that it is a good insulator. The Chemistry of Plant Life And on going outside to the telegraph pole against the wall, he clambered up it and attached wires to two of the insulators. Spies of the Kaiser Plotting the Downfall of England The path in which an electric current exists is called an electric circuit, and may consist wholly of a conducting body, or partly of a conductor and insulator or dielectric, or wholly of a dielectric. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 2 "Ehud" to "Electroscope" 2011-01-29T03:00:23.777Z DIELECTRIC, in electricity, a non-conductor of electricity; it is the same as insulator. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 4 "Diameter" to "Dinarchus" Those columns you see are filled with liquid insulators for the nerve cables to vibrate in; for they do vibrate, Dr. Lee, as they transmit their messages. The Brain It would get cold before long, unmercifully cold, but his sleeping bag was a good-enough insulator to keep him warm with the help of solar energy stored during the day by its Gergen cells. Duel on Syrtis Poles were erected; the wire was strung on glass insulators; it now worked to a charm. The Story of Our Country Every Child Can Read These substances differ greatly in insulating power, and according as the conductivity is more or less marked, they are spoken of as bad or good insulators. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 8 "Conduction, Electric" Like that incident in his basement—Philon had curiously pulled open a heavy steel door to a small cubicle filled with a most complex arrangement of large coils and heavy insulators and glassed-in filaments. The House from Nowhere Space is a vacuum, which means it's a good insulator. Let'Em Breathe Space An oven, for instance, may be surrounded by a "jacket" filled with ground smouldering mixture having a non-conducting insulator outside and a connection with a chimney. Twentieth Century Inventions A Forecast So I took my time teasing the tape through and finally got it to act as an insulator without breaking the wire. The Trouble with Telstar Many of the so-called insulators, such as mica, ebonite, indiarubber, and the insulating oils, paraffin, &c., decrease in resistivity with great rapidity as the temperature rises. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 8 "Conduction, Electric" Our English workmen screw the earthenware insulators on the posts, strain the wire, and order the Arabs about by the generic term of Johnny. The Works of Robert Louis Stevenson, Volume 9 Thereafter you could often see Indians with their heads against the telegraph poles, listening to the peculiar sound the wind makes as it runs along the wires and through the insulators. The Battle of Atlanta and Other Campaigns, Addresses, Etc. The air, however, is not a perfect insulator and the charge will gradually leak off. Astounding Stories, May, 1931 There was no activity in there now, except for one man who was operating what I imagined might be an aerial insulator, guarding the place from any prying search-vibrations. Astounding Stories of Super-Science, November, 1930 Diffuse Reflection of Cathode Rays.—When cathode rays fall upon a surface, whether of an insulator or a conductor, cathode rays start from the surface in all directions. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 8 "Conduction, Electric" Each one that will not make it ring is a poor conductor or an insulator. Common Science This is due to the formation of a tough coating of crystallized lead sulphate, which is practically an insulator. The Automobile Storage Battery Its Care And Repair An arm of wood had been secured to each of the trees, and to these the wires were fastened by means of porcelain insulators. The Destroyer A Tale of International Intrigue We had wired his cubby with the insulator; within its barrage we could at last talk with a degree of freedom. Astounding Stories of Super-Science, March 1930 To ensure against any moisture which may ascend from the marble or brick floor of the chamber in which the instrument is lodged, small glass cups are placed as insulators under the castors. The Pearl of the Antilles, or An Artist in Cuba Cloth, rubber, glass, and porcelain are very poor conductors, and they are therefore used as insulators,—to keep the electricity from going where you do not want it to go. Common Science An insulator between plates of opposite polarity; usually of wood, rubber or combination of both. The Automobile Storage Battery Its Care And Repair The aerial itself should be made of copper wire and should be hung between spreaders as long as convenient and insulated from them by two cleat insulators in series at each end. Boy Scouts Handbook The First Edition, 1911 On a much-drilled horizontal panel, propped up on insulators, were half a score of delicate meters of one kind and another, with thin black fingers that pulsed and trembled. Astounding Stories of Super-Science, March 1930 We pass, therefore, to electrical communication as effected by induction—the influence which one conductor exerts on another through an intervening insulator. Little Masterpieces of Science: Invention and Discovery Anything that allows practically no electricity to pass through it is called an insulator. Common Science The Willard Company has adopted an insulator made of a rubber fabric pierced by thousands of cotton threads, each thread being as long as the separator is thick. The Automobile Storage Battery Its Care And Repair At length he reached the spot he had fixed upon, fastened the wire to the insulator, and lifted the top of the post a few feet. Partners of the Out-Trail These are the insulators, and if it were not for them, no electricity would remain on the surface; as it is, electricity is hard enough to keep in charge, even with the best insulators. Memoranda Sacra With an ordinary land line, air serves as so good a non-conductor and insulator that as a rule cheap iron may be employed for the wire instead of expensive copper. Little Masterpieces of Science: Invention and Discovery Make a list of the things you have tried; in one column note the good conductors, and in another column note the insulators and poor conductors. Common Science Wiring on the inside of buildings should be done neatly, running the wires on porcelain insulators, and as directly to the appliance as possible. The Automobile Storage Battery Its Care And Repair Black beads slipped on the wire serve very well as insulators. Boys' Book of Model Boats Everything delighted her, now he was gone, the insulator, the obstruction removed, the world was all hers, in connection with her. The Rainbow It can not follow us," the girl explained, "Certain juices of the plants provide an insulator against the ray. The Copper-Clad World Anything like glass, that allows the heat to travel through it only with difficulty, is called a poor conductor of heat, or an insulator of heat. Common Science Free all the shorts in this way, unless you have some old rubber insulators. The Automobile Storage Battery Its Care And Repair The enormous and increasing use of electricity requires much use of rubber as an insulator. Makers of Many Things The shaded circle is the line wire, the two blank circles indicate the wire which ties the line wire to the insulator. How it Works Dealing in simple language with steam, electricity, light, heat, sound, hydraulics, optics, etc., and with their applications to apparatus in common use Then, too, they wanted to fasten the porcelain insulators just right and had to consult one of the books several times. The Campfire Girls of Roselawn Or, a Strange Message from the Air A nut on the end of the threaded rod holds the insulator in position. Respiration Calorimeters for Studying the Respiratory Exchange and Energy Transformations of Man No matter how perfectly it might be insulated, the atmosphere itself would not be an insulator, with power such as this. Empire The power lines merely come up to the pole on one side, pass through the insulators, and go away from the pole on the other side. David and the Phoenix This defect is, however, minimized by crossing the wires about among themselves, so that any one line does not pass round the corresponding insulator on every pole. How it Works Dealing in simple language with steam, electricity, light, heat, sound, hydraulics, optics, etc., and with their applications to apparatus in common use She also obtained the necessary porcelain insulators and tubes. The Campfire Girls of Roselawn Or, a Strange Message from the Air An attempt was next made to substitute hard-rubber tubing for the glass tube, but this did not prove to be an efficient insulator. Respiration Calorimeters for Studying the Respiratory Exchange and Energy Transformations of Man Ground mica is used in pipe and boiler coverings, as an insulator, in patent roofing, and for lubricating and decorative purposes. The Economic Aspect of Geology The Phoenix began to uncoil the wire, while David gazed up doubtfully at the shadowy maze of lines and insulators on the cross-arms. David and the Phoenix He lifted his razor once more and was trying to sever the electric wires when the steel blade cut the insulator and an alarming flash of light resulted. Fantômas Glass insulators are used to fasten the wires to the cross-arms of the poles, and the tie-wires used for this purpose must be the same size as the main wire and carry the same insulation. Electricity for the farm Light, heat and power by inexpensive methods from the water wheel or farm engine Slightly below his position and barely six feet away from him one of the main power cables of the cavern was suspended from heavy insulators. The Cavern of the Shining Ones Omega explained that likely its bony scales had acted as an insulator against the action of the invisible wall. Omega, the Man David could hear the creak of the lines under the Phoenix's weight and the rattling of the screw driver against the porcelain insulators. David and the Phoenix They are provided with a small store of wire and a few insulators to enable them to keep the telegraph in working order. The Caravan Route between Egypt and Syria It is considered one of the timbers likely to supply the place of black locust for insulator pins on telegraph poles. Seasoning of Wood He had brought with him four hundred feet of copper bell-wire and a dozen or so cleat insulators. Jim Spurling, Fisherman or Making Good Linesmen can loosen and dirty insulators to cause power leakage. Simple Sabotage Field Manual A woodpecker in my vicinity has drummed for two seasons on a telegraph-pole, and he makes the wires and glass insulators ring. Bird Stories from Burroughs Sketches of Bird Life Taken from the Works of John Burroughs Hurrying to the nearest telegraph pole, he swarmed up to the cross-tree, and quickly filed through the wire on one side of the glass insulator. The Young Railroaders Tales of Adventure and Ingenuity Used for spokes, insulator pins, posts, railway ties, wagon framing, turnery, and woodcarving. Seasoning of Wood These old trees have rough bark, which may serve as an effective insulator against extremes of temperature. Northern Nut Growers Association Report of the Proceedings at the Thirty-Seventh Annual Report Wooster, Ohio, September 3, 4, 5, 1946 Paraffine or petroleum wax has largely superseded beeswax; it is used mainly in the manufacture of candles and as an insulator for electric wires. Commercial Geography A Book for High Schools, Commercial Courses, and Business Colleges The practice may have gained vogue from an observance of the use of glass knobs as insulators of telegraph-wires. Lippincott's Magazine, Vol. 26, August, 1880 of Popular Literature and Science As the cut had been made close to the glass insulator on the cross-arm, only one of the two ends hung to the ground, and he saw that he could not splice them. The Young Railroaders Tales of Adventure and Ingenuity Give us six months and a place to set up a wire-drawing mill and an insulator synthesizer, and we could rebuild it. The Aliens Their eyes rose slowly from the window up and out along the ascending wires to where they mounted the poles and eastward and westward leaped away sinking and rising from insulator to insulator. Bonaventure A Prose Pastoral of Acadian Louisiana The New York electricians arrived and with them came aerials, generators, detectors, tuners, insulators, amplifiers, and all the hundred and one parts necessary for a perfectly equipped radio station. Walter and the Wireless He knows that a current can't pass through an insulator, so a condenser obviously can't be what you say it is. Anchorite Or was it that the force of the vibration filtered off at each insulator along the line until it became too feeble to be heard? Ted and the Telephone |
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