Sentences with phrase «drift over time»

An Argo is deployed with a drifting life expectancy of five years... sensors drift over time when not calibrated regularly

Unless there is drift over time (common in survival analysis situations, for example), this does not bias the mean at all.

One other item an accuracy, all instruments drift over time and must be calibrated on a regular basis.

As with any active fund, the strategy can drift over time.

Standard advice is that you should periodically reset (rebalance) your portfolio to its original allocations to correct for this drift over time.

The question of rebalancing arises because the asset allocation in any diversified portfolio will drift over time.

As a result of the market fluctuations of one asset class versus another over a given period, all portfolios drift over time from their original asset allocation.

While chip - sized atomic clocks (CSACs) are commercially available, the researchers say these low - power devices — about the size of a matchbox — drift over time, and are less accurate than fountain clocks, the much larger atomic clocks that set the world's standard.

But clock precision tends to drift over time spans beyond a few hours because the atoms are dispersed in high - pressure gases, which alter the atoms» resonant frequency — the clock tick rate — depending on temperature.

Genetic drift is the term used in population genetics to refer to the statistical drift over time of gene frequencies in a population due to random sampling effects in the formation of successive generations.

In my current incarnation as a radiation engineer, I often find issues with electronics and rush to the satellite design engineer and say, «Did you know...» More often than not, they say, «Yeah, and this is what we did to mitigate that...» Orbiting observatories like Hubble are a devils playground for radiation effects, which can corrupt data and cause systematic drifts over time as radiation dose mounts.

Intrigued, other scientists set about investigating and found errors in the original methods to do with differences between sensors on the satellites, and the satellites themselves drifting over time.

Not exact matches

The practice means that each new year's grants tend to end up being potentially more valuable than the previous year's, just because stock prices tend to drift higher over time.

But since stock prices tend to drift upward over time, this can lead to what looks in retrospect like a boneheaded move.

In the meantime, bond yields have drifted higher and jumped shortly after 2 p.m. ET, finally pushing the 10 - year over 2.6 percent for the first time since mid-December.

Over time that share will drift down, but to no less than 90 percent of those costs in future years.

«As alluded to earlier when discussing the long - term upward drift in CAPE, another related but distinct headwind for contrarian stock market timing in the second half of our sample has been the decades - long valuation drift in post-World War II equity markets, over which the CAPE gradually doubled.

But over time, asset allocations tend to drift away from the target.

Ball points to the Ford Foundation as one example of a major charity that, in her view, drifted leftward over time and away from the ideals of man who started it, industrialist Edsel Ford.

Many of them will drift back over time.

It's feels like we're finally over the edge and drifting into Spring, but man has it taken a long time.

It's very hard to focus at this time of year; I find my thoughts drifting all over the place, and sometimes I want to do nothing more than make a Margarita and sit by the pool.

At The Grove in Watford he had mulled over those ankle injuries which have so often tripped up his progress, his mind drifting from months spent anchored in the treatment room to the times he had been outed, often on social media, with a cigarette in hand.

Two minutes into stoppage time, Millwall grabbed a winner when Robe's free kick from 40 yards out on the right drifted over Aguirre and into the net.

With half time approaching, Ozil drifted into space about 30 yards out from goal and clipped a beautiful pass over the top of the defence for Alexis.

• No contact at one stage does not necessarily predict no - contact at a later stage: Maclean & Eekelaar (1997) found non-resident fathers changing the nature and extent of their contact with their children over time, with many drifting back into contact after initial separation.

It has been loved by generations over time and features sweet little poems about goodnight wishes from a young bunny while drifting off to sleep.

In fact, too much compromise would betray the very beliefs that motivate activists to show up and vote, meaning that many would drift way over time, disillusioned yet again.

«Our study shows that epigenetic drift, which is characterized by gains and losses in DNA methylation in the genome over time, occurs more rapidly in mice than in monkeys and more rapidly in monkeys than in humans,» explains Jean - Pierre Issa, MD, Director of the Fels Institute for Cancer Research at LKSOM, and senior investigator on the new study.

He realized that if these birds lived on such similar islands but were slightly different from one another, there could be just one explanation: They had started out as a single species, but over time and with separation they had drifted apart and changed.

Scientists believe that these ions, which the SELENE spacecraft (better known as Kaguya) detected, drifted over geologic time from the outer layers of Earth's atmosphere and became embedded in the moon's regolith, a loose top layer of soil and rock.

«This ensures that customers aren't taken advantage of by low introductory prices that drift upward over time, expecting customer inertia to prevent them from switching again as needed,» says Lumator's founder and CEO Prashant Reddy.

This creates radiation that can act as a sort of mini-thruster, causing asteroids to drift widely over time.

This force can cause asteroids to drift widely over time, making it difficult to identify families of fragments leftover after asteroid collisions eons ago.

But some evolutionary changes we see may simply be the result of genetic drift (random genetic changes that accrue over time).

«It seems that, once «do» was introduced in interrogative phrases, it randomly drifted to higher and higher frequency over time,» said Plotkin.

Over time, the rings spread out, and the icy bits that drifted farthest from Saturn eventually reached distances where their gravitational attraction for each other could overcome the planet's tidal forces that tended to rip them apart — a process that is still happening today, according to observations by the Cassini spacecraft now touring the Saturn system.

Most stars are born as members of star cluster, but over time they drift apart and migrate across the galaxy.

Comparing the spurs in the ant populations, they found significant variations in the lengths of the less important hind spurs, which corresponds to the random genetic drift that occurs over time.

And polar - orbiting satellites are designed to cross the same spot at the same time each day, which is important for tracking changes in cloud cover — but over time, the satellites may drift in their orbits as they run low on fuel, arriving a bit later each day.

As a result, most changes in the DNA of complex organisms over time are due to drift rather than selection, which is why biologists focus on sequences that are similar, or conserved, when they compare genomes.

«Over time, these disks will want to drift out of orbit.

But skeptics suggested that the 1500 tools and other artifacts could have drifted downward over time in the sandy sediments or that animals or termites had disrupted the layers.

The temporal variation hypothesis predicts that songs are selectively neutral and may drift and change over time.

The virus itself will continue to mutate from year to year — a process referred to as antigenic drift — and over time it becomes less well matched to the vaccine strain, meaning that the antibodies you generate from getting the vaccine may be less effective in neutralizing the circulating virus.

Not all of these differences affect traits — some mutations are silent or are not coded into proteins — these build up over time by a process called genetic drift, and are not acted on by evolutionary selection.

While twins may start out epigenetically matched, their epigenomes appear to «drift» over time.

Over time, the natural drifting motions of each star will break this order, and the snowflake design will be no more.

Well, many with a good (low) insulin response at the start will inevitably drift into hyperinsulinemia over time, given our ridiculous food supply since the 1970's.

I almost drifted off but before I knew it my first hour was up and it was time to turn over and repeat the whole process on my front.