Sentences with phrase «at low frequency by»

This idea is intuitive: in theory, large - effect variants would be kept at low frequency by natural selection, a pattern that's well established for mutations that cause rare single - gene disorders.

It is not enough to look at global or hemispheric means of surface temperature and note that the models are not that far from producing internal variability of the right magnitude — perhaps most existing models only do this once in a blue moon, but I can imagine increasing the variance at low frequencies by a factor of two, say, so that the required magnitude is achieved more frequently.

Not exact matches

The report found, among other things, that 43 of the lower 48 U.S. states have set at least one monthly heat record since 2010, sea levels are expected to rise between one and four feet by the end of this century, winter storms have increased in intensity and frequency, and the past decade was warmer than every previous decade in every part of the country.

They hint at the same thing: Lower - frequency sex songs are being drowned out by the human din.

The research group discovered migrating (moving) shallow low - frequency tremors which are thought to be triggered by slow episodic slipping (slow slip event) at the shallow plate boundary.

The shallow tremors had similar migration properties to deep low - frequency tremors that occur at the deep subducting plate interface, and that they also occurred synchronized in time and space with shallow very - low - frequency tremors that also thought to be triggered by slow slip events.

«Given the projected very low frequency, 3.2 per 10,000, of radiation - associated thyroid cancer among young people, it is unlikely that any excess would be detectable by the usual epidemiologic approaches,» says Roy Shore, head of research at the Radiation Effects Research Foundation in Hiroshima, and a co-author of the WHO report.

By progressively increasing amplitude at a low frequency, the researchers felt they could give the impression that users» fingers were sticking to the screen.

By powering the membrane with a high frequency laser beam, researchers induced the BIC system to emit its own lower frequency laser beam (at telecommunication frequency).

The objects causing these low - frequency ripples — such as orbiting supermassive black holes at the centers of distant galaxies — would be different from the higher frequency ripples, emitted by collisions of much smaller black holes, that have so far been detected on Earth.

Furthermore, the fundamental frequency of male wing beats have been measured at 500 to 900 Hz, far lower than the high - pitched tone emitted by Fugue FM.

The CALLISTO (Compound Astronomical Low - cost Low - frequency Instrument for Spectroscopy in Transportable Observatory) spectrometers, designed and built by electronics engineer Christian Monstein of the Institute for Astronomy of the Swiss Federal Institute of Technology Zurich (ETH Zurich), record the intensity of electromagnetic radiation at radio frequencies, between 45 and 870 megahertz.

The researchers predicted that an atom could be cooled if it is irradiated from two sides by laser light at a frequency slightly lower than the frequency needed for maximum absorption.

The ARM method, on the other hand, uses a gentle acoustic wave generated by a similar power as ultrasound imaging and at a lower frequency.

• In a bungled attempt at clarification of a letter by Valerie Yule about using concert technology to help older people discriminate dialogue (19 March, p 33), we added a sentence saying that compensating for the difficulty of picking out voices from low - frequency background noise «often requires that the radio or television be turned up to a level unpleasant for younger ears».

Researchers at the University of Southampton are investigating the scope for neutralising low - frequency bass notes by generating «antiphase» sound with an ordinary hi - fi system.

Found by UW - Madison undergraduate student Kayla Sylvester, a member of Hittinger's group, the yeast occurs only at a very low frequency and was likely accidentally introduced, just as an ancestor found its way to Europe and kick - started the production of cold - brewed lager beer hundreds of years ago.

At day 34 post infection, human CD4 + T cells were purified by positive selection prior to analysis to reduce any bias from low frequency contaminating human cells.

The similar phenomenon has been reported by observational researches of the surrounding environment of supermassive black holes at lower frequencies (millimeter wavelengths).

In the 1950s, Reber sought a field that seemed neglected by most other researchers and turned his attention to cosmic radio waves at very low frequencies (1 - 2 MHz, or wavelength 150 - 300 meters).

The accuracy of next - generation sequencing (NGS) for detecting tumor - specific mutations in plasma DNA is hindered by errors introduced during PCR / sequencing, base substitutions caused by DNA damage, and pre-existing mutations in normal cells that are present at a low frequency.

For instance, astronomers believe that gravitational waves also exist at much lower frequencies than what is detectable by the LIGO and Virgo instruments, but in order to sense these waves, the length of the interferometer arms will need to be much, much longer.

With higher frequencies swamped by dust emission and lower frequencies by another «foreground» called synchrotron radiation, 150 gigahertz sat at a sweet spot with minimal contamination.

Researchers from the French National Center for Scientific Research (CNRS), the Côte d'Azur Observatory and elsewhere used observations made by the Solar and Heliospheric Observatory's (SOHO) Global Oscillations at Low Frequency (GOLF) instrument to measure solar oscillations, then used a new technique to determine the speed at which the solar core was spinning.

Both of these cell line - associated XMRV genomes were found to exhibit a lower degree of intra-strain variation than previously reported for XMRV from 22Rv1 cells [20], with only 19 SNPs detected in the 22Rv1 - associated XMRV genome at the 3 % frequency cutoff by deep sequencing, and only 25 SNPs in the LNCaP - associated genome (Fig. 7A; Table S1).

Two IFN - alpha - unresponsive mutants were isolated previously at a low frequency (ca. 10 -LRB--8)-RRB- by selecting mutagenized 2fTGH cells in selective medium containing 6 - thioguanine and IFN - alpha.

Men with this disease often have chills; fever; pain in the lower back and genital area; urinary frequency and urgency, often at night; burning or painful urination; body aches; and a demonstrable infection of the urinary tract as evidenced by white blood cells and bacteria in the urine.

Optimal filtering involves removing noise elements that have different frequencies from the signal, and this can be done by setting limits at both high and low frequencies (De Luca et al. 2010).

The Active Noise Cancellation (ANC) system identifies and reduces unwanted low - frequency sounds by using strategically placed microphones within the cabin and using a sound wave at the same amplitude through noise cancellation speakers to mask unwanted sounds.

0.1.2 parallel evolution routine affecting the random numbers generation upon adjusting the cooling power along the stream contour line by one unit toward the power maximums of 999 units — if touched then set the power at the middle of the coverage band and rescale units by transposition of the position inside the coverage band, automatic routine virtual frequency parameter inline with twice of the interruption frequency for random number request, on idle sustaining the previous frequency divided by the power of lowest amplitude (that of the tangent point (touching point of the actual scan) of the streamline nearest to the component location inside the matrix)

0.1.4 parallel evolution routine affecting the random numbers generation upon adjusting the current - balance protection along the stream contour line by one unit toward the power minimums of 666 units — if touched then set the power at the middle of the coverage band and rescale units by transposition of the position inside the coverage band, automatic routine virtual frequency parameter inline with four times of the interruption frequency for random number request, on idle sustaining the previous frequency divided by the power of lowest amplitude (that of the tangent point (touching point of the actual scan) of the streamline nearest to the component location inside the matrix)

This has been achieved by making it operable at low frequencies, which is down to sub-hertz levels.

It almost certainly survived at low frequency in Europe for millennia and then was dispersed outside of Europe by colonialism, though not as successfully as some other lineages.

Voyager emits specific low level radio frequency energy that blocks cancer cells from dividing by blocking the dis - assembly of microtubule, leading to aberration, multi-nucleation and interruption of mitotic spindle activity during cell division, at metaphase

The «Painless Stainless» program allows retailers to order bowls in small or large quantities at any frequency and at the lowest possible price, allowing retailers to make the highest gross margin returns by placing small orders and minimizing the cash tied up in inventory.

However, molecules with 3 or more atoms can vibrate by changing the angles between the three atoms, and they can vibrate at additional (lower) frequencies.

Finally, the amplitude of internal variability isn't independent of climate sensitivity, so it seems that by positing a mysterious source of high - amplitude, low - frequency variability and a low climate sensitivity, Judith wants to have her cake and eat it at the same time.

It is used for dust in the interstellar medium which has continuous opacity as a function of frequency but it is not really gray but rather has lower opacity at lower frequency, Thus a layer which is opaque in up welling emission may be transparent in down welling absorption so that the next layer out sees its own down welling emission canceled by emission from the opposite side in the approximation of complete transparency at the appropriate frequencies for the inner shells.

This is fine for estimates at annual and decadal time scales, but as you approach the timespan covered by each core, you run a serious risk of starting to remove part of the climatic variation, thereby under - estimating the total amount that occurred, with the loss being greatest at the longest time scales (i.e. lowest frequency variation).

We can not rule out the possibility that some of the low - frequency Pacific variability was a forced response to variable solar intensity and changing teleconnections to higher latitudes that are not simulated by the models, or that non-climatic processes have influenced the proxies... the paleodata - model mismatch supports the possibility that unforced, low - frequency internal climate variability (that is difficult for models to simulate) was responsible for at least some of the global temperature change of the past millennium.»

This industry has been well aware of the problems directly caused by wind turbine noise since 1987, when Dr Neil Kelley's research [12] establishing direct causation of annoyance symptoms from infrasound and low frequency noise was presented at the American Wind Energy Association conference.

• There is strong evidence that the multidecadal SAT variability in the Atlantic (and globally) is driven (at least partly) by variations in the MOC • A stochastic scenario is most plausible, in which the ocean is driven by the low - frequency portion of the atmospheric variability (NAO).

1 / f noise is very common in nature, and can be used to model phenomenon as disparate as the curvature of a beach to the volume produced by a symphony orchestra to the spectrum of noise from almost all semiconductor devices at low enough frequencies.

Drought is expected to occur 20 - 40 percent more often in most of Australia over the coming decades.6, 18 If our heat - trapping emissions continue to rise at high rates, 19 more severe droughts are projected for eastern Australia in the first half of this century.6, 17 And droughts may occur up to 40 percent more often in southeast Australia by 2070.2 Unless we act now to curb global warming emissions, most regions of the country are expected to suffer exceptionally low soil moisture at almost double the frequency that they do now.3 Studies suggest that climate change is helping to weaken the trade winds over the Pacific Ocean, with the potential to change rainfall patterns in the region, including Australia.20, 21,16,22

The consequences of exposure to impulsive infrasound and low frequency noise generated by wind turbines were also clearly well known to the global wind industry, because of the dramatic change in design which resulted, and because the results were presented at the AWEA sponsored conference.

He went on to say «It found many people living near wind turbines at a wind farm near Cape Bridgewater in Victoria are suffering health complaints caused by low - frequency noise generated by wind turbines».

At present, the northernmost woodlands and krummholz are less susceptible to burning and being destroyed by fire owing to the still cool and humid climatic conditions prevailing in the northern part of the forest tundra, where fire frequency is very low, and the lack of extensive forest fuels.

Not one of the people who they trot out as «eminent scientists» or «experts» have ever bothered to go out in the field; gather any real data; or even speak, in person (ie in the same room at the same time) to the people suffering the known and obvious adverse health effects caused by incessant low - frequency noise and infrasound.

Curious that Danes should complain about precisely the same effects from the incessant low - frequency noise and infra - sound generated by giant fans that Vestas» victims at Macarthur in Victoria do?

As such, recent studies looking back at the past 30 years of data show a decadal modulation of El Niño Southern Oscillation (ENSO) stability, with the past decade characterized by higher - frequency and lower - amplitude El Niños than the previous ones [22].