| 单词 | point source |
| 例句 | The images showed numerous distinct point sources, essentially 8% of the focus area was eroding. Dust is a growing problem. What role does farmland play? 2022-01-25T05:00:00Z "Previously discovered galaxies at these distances are point sources -- they appear as a dot in our images," Wang said. Second-most distant galaxy discovered using James Webb Space Telescope 2023-11-13T05:00:00Z “If we identify the point sources for AMR and its distribution in the environment, it’s much easier to identify mitigation strategies,” Bonnedahl says. Changing bird migrations threaten to bring new infectious diseases to humans 2023-09-26T04:00:00Z They were also possibly from a single point source, such as a star, rather than a fuzzy galaxy, says Paulin, who will start graduate school at the University of Pennsylvania in the fall. JWST Might Have Spotted the First Dark Matter Stars 2023-07-20T04:00:00Z “But inside that haze, we should really see individual point sources, individual emitters, and that would be groundbreaking again.” In a First, Scientists See Neutrinos Emitted by the Milky Way 2023-06-29T04:00:00Z Steel Mon Valley Works spews health- and climate-harming pollution, propelling Allegheny County to the top 1 percent of all counties in the United States for urban and nonurban point source air toxics emissions. Opinion | Green steel is within our reach 2023-02-03T05:00:00Z In addition, the EPA should set environmental limits for nitrogen and phosphorus so states will have to set standards for them under the CWA, which will help reduce loads of these pollutants from point sources. We Need 50 More Years of the Clean Water Act 2022-10-18T04:00:00Z "There is some contention as to what constitutes a point source or not," said Dietrich Hoefner, an environmental and regulatory lawyer at Lewis Roca in Denver, Colorado. Are Hawaii’s beach showers in violation of the Clean Water Act? 2022-09-14T04:00:00Z What is the angle between two just-resolvable point sources for this microscope? College Physics for AP Courses 2015-08-12T00:00:00Z The X-ray-emitting point sources are white dwarfs, neutron stars, and stellar black holes. Astronomy 2016-10-13T00:00:00Z Food waste became a preoccupation of environmentalists, lawmakers and state regulators after studies showed that landfills are the biggest “point source” of methane. Some see L.A. as a composting 'laggard.' Are Angelenos ready to change that? 2022-08-18T04:00:00Z A stationary source of air pollution refers to an emission source that does not move, also known as a point source. Environmental Biology 2018-09-06T00:00:00Z "If you look at the Clean Water Act, it says that a point source is 'a discernible, confined and discrete conveyance, including, but not limited to any pipe, ditch, channel, tunnel, conduit, well.'" Are Hawaii’s beach showers in violation of the Clean Water Act? 2022-09-14T04:00:00Z The pattern is similar to that for a single point source, and it is just barely possible to tell that there are two light sources rather than one. College Physics for AP Courses 2015-08-12T00:00:00Z Blue point sources show stars or star clusters without dust. Here’s how the first images from the James Webb Space Telescope stack up to Hubble’s epic shots 2022-07-12T04:00:00Z That’s probably because of the specific mathematical nature of the field of a point source, whose strength famously varies inversely with the square of the distance to the point. Gravitational wave radar could probe deep space for tiny stellar objects 2022-06-23T04:00:00Z Pollutants enter water supplies from point sources, which are readily identifiable and relatively small locations, or nonpoint sources, which are large and more diffuse areas. Environmental Biology 2018-09-06T00:00:00Z "That would be a discrete conveyance and a point source." Are Hawaii’s beach showers in violation of the Clean Water Act? 2022-09-14T04:00:00Z What is the angle between two just-resolvable point sources for this telescope? College Physics for AP Courses 2015-08-12T00:00:00Z There’s point source carbon capture, which is retrofitting an existing facility and avoiding emissions from entering the atmosphere. Can Carbon Capture Be Part of the Climate Solution? 2022-06-13T04:00:00Z In his defense, Hailey notes that he never claimed all of the dozen point sources were black hole binaries. Swarms of Black Holes at the Milky Way’s Heart? Maybe Not 2022-04-05T04:00:00Z Combined sewer systems that have a single set of underground pipes to collect both sewage and storm water runoff from streets for wastewater treatment can be major point sources of pollutants. Environmental Biology 2018-09-06T00:00:00Z He and his colleagues allege that the showers are "point sources," defined by the Clean Water Act as "single identifiable sources of pollution from which pollutants are discharged." Are Hawaii’s beach showers in violation of the Clean Water Act? 2022-09-14T04:00:00Z How close together could these point sources be at the 2 million light year distance of the Andromeda galaxy? College Physics for AP Courses 2015-08-12T00:00:00Z Do you see point source systems being in place by then? Can Carbon Capture Be Part of the Climate Solution? 2022-06-13T04:00:00Z They found that a small number of wells and pipelines accounted for “the vast majority” of methane leaks, Ms. Chen said, adding, “Comprehensive point source surveys find more high-consequence emission events, which drive total emissions.” Methane Leaks in New Mexico Far Exceed Current Estimates, Study Suggests 2022-03-24T04:00:00Z These farms are considered potential point sources of pollution because untreated animal waste may enter nearby waterbodies as untreated sewage. Environmental Biology 2018-09-06T00:00:00Z The resulting research paper is punctuated with references to pollution discharge permits and precise statutory definitions of "pollutants" and "point sources." Are Hawaii’s beach showers in violation of the Clean Water Act? 2022-09-14T04:00:00Z Another method is carbon capture and storage, which captures emissions at "point sources" where they are produced, such as at coal-fired power plants. Seven ways to curb climate change 2021-11-11T05:00:00Z I see C.C.S. in a decade being deployed on industrial point sources that are hard to decarbonize today — cement, primarily, and in some cases, steel. Can Carbon Capture Be Part of the Climate Solution? 2022-06-13T04:00:00Z “These factors prevented the possible identification of a point source. Still, the NRC report allows for high confidence that this was oil.” Records show slow response to report of California oil spill 2021-10-04T04:00:00Z Combined Sewer System A combined sewer system is a possible major point source of water pollution during heavy rain due to overflow of untreated sewage. Environmental Biology 2018-09-06T00:00:00Z Any lawsuit would have to convince courts that a shower could really be a point source. Are Hawaii’s beach showers in violation of the Clean Water Act? 2022-09-14T04:00:00Z Previous satellites have lacked the resolution and focus to monitor point sources rigorously. California to hunt greenhouse gas leaks and super-emitters with monitoring satellites 2021-04-15T04:00:00Z “The next time the observatory looks like this,” said NASA’s Eric Smith, a program scientist for the telescope, “it will be beyond the moon and appear to us as a roughly 17th-magnitude point source.” The Webb Telescope, NASA’s Golden Surfer, Is Almost Ready, Again 2021-02-02T05:00:00Z In 2002, satellites from Japan and the European Space Agency began taking stock of global emissions, but the resolution was too low to identify point sources. New Technology Claims to Pinpoint Even Small Methane Leaks From Space 2020-11-11T05:00:00Z “The reality is that we’re still seeing transmission across the city,” she said, “Given the large volume of new cases, we can’t track those back to a single point source.” 10 Weeks Into New York Area’s Lockdown, Who Is Still Getting Sick? 2020-05-28T04:00:00Z But historically, he said, "Regulators think of point sources as things that come out of pipes." Are Hawaii’s beach showers in violation of the Clean Water Act? 2022-09-14T04:00:00Z The Clean Water Act requires “point sources” of pollution to obtain permits for “any addition of any pollutant to navigable waters.” Clean Water Act Covers Groundwater Discharges, Supreme Court Rules 2020-04-23T04:00:00Z “There was a big point source outbreak in that village,” he says. Antibody tests reveal that coronavirus infections vastly exceed official counts 2020-04-16T04:00:00Z In particular, if the templates for the different types of point sources aren’t right, then the analysis tends to drastically underestimate the smoother dark matter signal, tests on simulated data show. Physicists revive hunt for dark matter in the heart of the Milky Way 2019-11-12T05:00:00Z The network data indicates more than 70,000 point sources or discharges fired off in the one hour between 8 and 9 p.m. local time. Analysis | ‘Never seen anything like it’: How a ‘near constant’ lightning show lit up parts of central Maryland on Sunday night 2019-08-19T04:00:00Z When Downs explains why he and his co-authors believe the showers are point sources, he doesn't mention pipes. Are Hawaii’s beach showers in violation of the Clean Water Act? 2022-09-14T04:00:00Z It was undisputed that the injection wells in Maui were “point sources.” Clean Water Act Covers Groundwater Discharges, Supreme Court Rules 2020-04-23T04:00:00Z The hazard is particularly great in cities and near mining or other industrial point sources of lead. Perspective | How the dust in your home may affect your health 2019-07-19T04:00:00Z First, a fast-estimating code called EPIC—consisting primarily of Allen's ElarmS—generates an initial magnitude, treating the quake as a point source. California’s new earthquake warnings deliver critical seconds of notice 2018-11-01T04:00:00Z In 2011 that patience began to pay off as the point source became lopsided at radio wavelengths, perhaps due to the emission of a jet. Giant Black Hole Swallows Star and Belches Out Superfast Particle Jet 2018-06-14T04:00:00Z "We found it originally as a bright point source in the survey," explained Yale University's Tim Miller, an author on the study published in Nature. Telescope spots galactic 'mega-merger' 2018-04-25T04:00:00Z The question courts should ask, he wrote, was whether “the addition of the pollutants through groundwater is the functional equivalent of a direct discharge from the point source into navigable waters.” Clean Water Act Covers Groundwater Discharges, Supreme Court Rules 2020-04-23T04:00:00Z The point sources proved to be 10 globular clusters—compact and spherical groupings of stars, orbiting the galaxy’s core. Astronomers Boggle at Distant Galaxy Devoid of Dark Matter 2018-03-28T04:00:00Z He targeted three upstream drainage districts, representing more than two thousand farmers, and claimed that perforated pipes underlying their fields, which drain excess rain and snowmelt into ditches and creeks, constitute “point sources” of pollution. The Simple River-Cleaning Tactics That Big Farms Ignore 2017-12-07T05:00:00Z “It looked exactly like a point source in this image that wasn’t in the reference image,” Kilpatrick says. Colliding stars spark rush to solve cosmic mysteries 2017-10-15T04:00:00Z As well as capturing CO2 at point sources, many researchers think that combatting climate change will require the removal of some of the CO2 that is already in the atmosphere. Emissions: We have the technology : Nature : Nature Research 2017-10-10T04:00:00Z In dissent, Justice Clarence Thomas, joined by Justice Neil M. Gorsuch, said the law applied “only when a point source discharges pollutants directly into navigable waters.” Clean Water Act Covers Groundwater Discharges, Supreme Court Rules 2020-04-23T04:00:00Z “LivaNova is concerned that the article expresses a level of certainty about a point source tie to the manufacturing process that is not warranted by the data.” We may now know how a rare, lethal microbe infected dozens of people across the globe 2017-07-12T04:00:00Z “I’m concerned about spillover and introduction to other countries if the United States might be the point source,” he said. Mysterious Disease Attacks Rattlesnakes While the maximum load set for the river accounts for “non-point” applications - things like crop-irrigation runoff - discharge permits and their limits apply only to point sources, like fish farms. 6 big changes in Idaho aquaculture 2017-04-01T04:00:00Z So OCO-2 scientists were never expecting to record the emissions of individual point sources, like volcanoes or coal-fired power plants. Scientists detect volcanic carbon dioxide from space 2016-12-15T05:00:00Z Our impact assessment indicates that this LNG project would be one of the largest point source of emissions in Canada and would increase BC’s emissions by 8.5%. Scientists rate Canadian climate policies | James Byrne and Catherine Potvin 2016-11-28T05:00:00Z But researchers are still working to measure SO2 and CO2 at the same time, and measuring point sources of CO2 is challenging because of high background levels in the atmosphere. Volcanic fumes warn of imminent eruptions 2016-11-21T05:00:00Z “Having a model based on point sources rather than smooth emission changes your statistics,” says Tracy Slatyer, a physicist at MIT. Mysterious Glow at Milky Way's Center Could Be Dark Matter or Hidden Pulsars 2015-11-18T05:00:00Z Only one type of pollution—point sources such as factories—was not significantly linked to lower grade point averages. Dirty Air Correlates with Lower Grades in Texas Schoolchildren 2015-07-24T04:00:00Z "It's going to be a source of daylight comparable to the moon - but a point source," he told the BBC. Explosive stellar tussle revealed 2015-01-07T05:00:00Z In 1972, Congress passed the Clean Water Act, banning the discharge of pollutants from a point source into navigable waters, or “waters of the U.S.,” without a federal permit. Excerpts from recent North Dakota editorials 2014-10-16T04:00:00Z Civil and military collaborations should also be sought for monitoring methane point sources. Climate science: Understand Arctic methane variability 2014-05-13T04:00:00Z “That being said, I am not convinced that point sources are responsible for the excess.” Mysterious Glow at Milky Way's Center Could Be Dark Matter or Hidden Pulsars 2015-11-18T05:00:00Z Because outbreaks are no longer “point source,” like a summer picnic in origin, they are harder to detect. Hidden Dangers Lurking in Your Food 2013-09-04T18:15:00.667Z But in some cases, they may begin from a similar point source. As Temperatures Rise, Empires Fall 2013-08-03T21:05:22Z A surge deposition will tend to move radially away from a point source. Curiosity to return to some classic rocks 2013-05-08T22:42:41Z Evil begins from a point source—a cartridge of gunpowder, a nugget of uranium, a knot of hate in a single dark mind—and then it blows outward. Bombs, Instincts and Morals: Why Heroes Risk Everything for Strangers 2013-04-16T19:05:22Z When the CWA was passed, the primary concerns were 'point sources' of pollution: sewage and other easily recognizable sources such as industrial facilities. Clean Water Act at 40: Rivers No Longer Burn but Climate Threats and Runoff Now Rush In 2012-11-14T23:15:00.207Z Methane is the largest point source of greenhouse gases in Delta and Gunnison counties in Colorado, where there are lots of coal mines. Dot Earth Blog: Turning a Coal Mine's Gas Problem Into a Ski Resort's CO2 and Energy Solution 2012-07-13T19:26:24Z In this case, the point source led to an estimate of a magnitude-7.2 quake. Japan Faces Up to Failure of Its Earthquake Preparations 2011-03-29T23:45:00.403Z Think of a satellite as a point source that radiates an electromagnetic beep outward simultaneously in all directions, forming a sphere. How GPS devices pinpoint the location of moving objects 2009-11-03T05:00:00Z The Clean Water Act has been effective at regulating “point source” pollution from specific factories and waste plants. Gulf of Mexico Has Long Been a Sink of Pollution 2010-07-30T01:40:00Z Kovscek says, "some of the largest point sources of carbon dioxide in California are from these types of oil field operations." Chevron's solar panels won't clean up its filthy oilfield 2010-04-08T11:16:00Z To that end, the combustion-free building will not be a point source of pollution in the community—the new facility relies on a ground-source heat pump rather than a furnace. 2008-08-13T18:23:00Z "It's a point source, though, not an object at this range." Masters of Space You simply imagine that there is a point source of light at your point of projection: it isn't really there. Spacehounds of IPC Optical devices generally are considered in connection with "point sources," but inasmuch as no light can be obtained from a point, a source of small dimensions and of high brightness is the most effective compromise. Artificial Light Its Influence upon Civilization |
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