A collective term used to describe all types of glacier sedimentary deposits, regardless of the size or amount of sorting. The term includes all sediment that is transported by a glacier, whether it is deposited directly by a glacier or indirectly by running water that originates from a glacier. North-looking near-vertical aerial photograph of a 1-mile by 1.5-mile area recently-exposed by the retreat of Bering Glacier. The ground surface is covered by glacial sediment deposited in several ways, including as lodgement and ablation till, and as crevasse fill, Bering Glacier, Alaska. Bering Glacier flows through Wrangell-Saint Elias National Park. Photograph of the flank of a drumlin composed of glacial till. The length of this drumlin is ~ 1/8 mile. Note the two people for scale. Cranes Beach, MA.
Rock debris deposited by natural agents, specifically a deposit of clay, sand, gravel and boulders transported by a glacier or by running water from a glacier. "Older drift" is the term used to describe drift deposited by glaciers prior to the Wisconsonian glaciation.
A general term applied to all mineral material (clay, sand, silt, boulders) transported by a glacier and deposited directly by or from the ice, or by running water emanating from the glacier. Generally applies to Pleistocene glacial deposits.
In geology, drift is transported rock debris overlying the solid bedrock. The transport mechanisms can include, but are not limited to, glacial and fluvial (e.g. by glaciers or rivers), and mass movement including landslides.
The attitude of a borehole. The Drift Angle is the angle between the borehole axis and the vertical; the Drift Azimuth is the angle between north and the vertical projection of the borehole on a horizontal surface.
A horizontal or inclined passage in a tunnel. To float away with a current. Debris, such as trees, timbers, brush, etc., carried along by freshets. To match holes in steel work by drift-pins. To swing bridge members into place by means of a double set of ropes and blocks, one set releasing as the other set takes up. To enlarge a hole with a conical pin.
"Drift" mining simply means tunnelling a horizontal shaft that leads from a central deposit or ore. Drifts can run for hundreds, even thousands of feet, as miners traced tiny seams of gold fanning out from the original strike.
The speed (in knots) at which the current is moving. Drift may also be indicated in statute miles per hour in some areas such as the Great Lakes. This term is also commonly used to mean the speed at which a vessel deviates from the course steered due to the combined effects of external forces such as wind and current. With external inputs, such as heading devices and speed logs, many EPFS units and ECS can determine experienced set and drift.
1. The leeway of a boat; 2. The natural direction of movement of a boat caused by wind or current, when the boat is not under power; 3. The speed a boat is pushed sideways while under power; 4. The speed of current in knots; 5. To move along with the tide or current
When the wind blows loose snow over the surface. It generally happens when the wind is stronger than 15 knots. When the wind is stronger than 20 knots there will be snow up to head height and the visibility is seriously reduced.
In ballistics, movement of a bullet to the left or right of a straight line connecting the gun muzzle and the target. Windage designates drift caused by wind pressure. Ballistic drift is caused both by the bullets tendency to rotate on the air and by the precessional rotation of the bullets nose around the trajectory's curve, the latter being a gyroscopic phenomenon
be in motion due to some air or water current; "The leaves were blowing in the wind"; "the boat drifted on the lake"; "The sailboat was adrift on the open sea"; "the shipwrecked boat drifted away from the shore"
a movement of the specimen during the exposure time, which causes a blurring of the image. It leaves a characteristic signature in the diffraction pattern, from which the type, the direction, and the extent of the movement can be inferred (Frank, 1969).
The physical movement of prohibited substances from the intended target site onto an organic operation or portion thereof. Drip/trickle irrigation. Watering plants so that only soil in the plant's immediate vicinity is moistened. Water is supplied from a thin plastic tube at a low flow rate. It is the most efficient use of water for irrigation and also reduces the chance of pathogens because the entire plant is not wetted, thereby denying moisture to the microorganisms.
the leeway, or movement of the boat, when not under power, or when being pushed sideways while under power ase - to loosen or let out airlead - a fitting used to change the direction of a line without chafing
The lateral movement of a projectile due to rotation in flight through the atmosphere. If the gun has rifling with a left hand twist, the movement will be to left and vice versa, OR, The lateral movement of a projectile due to wind.
sideways movement of the ball through the air on its flight towards the batsman when bowled by a spin bowler, may be caused by differential airflow around the spinning ball and/or the wind. v.t. to achieve some drift with the ball. The bowler drifted the ball in to the batsman.
The movement of particles or droplets through the air from the area where it is being applied to locations outside the targeted area. Through drift or runoff, pesticides can affect more than just the crops it is intended for. Organic crops must use buffer zones to help guard against drift.
A term applied to either a natural developmental phenomenon (mesial drift) whereby the posterior teeth continually move slightly forward as the interproximal surfaces wear or where contiguous teeth are missing and there is movement into that space.
The expected value of a random function, it may be constant or it may depend on the coordinates of the location. In order for a random function to be stationary, second-order stationary or to satisfy the Intrinsic Hypothesis; the drift must be a constant. The drift is a characteristic of a random function and not of data.
A progressive (continuously upward or continuously downward) change in the number displayed on the digital readout. See "instability" to distinguish this characteristic from a non-progressive change in the displayed number.
Slow variation of a performance characteristic such as gain, frequency or power output. May be due to, for instance, temperature or ageing. Usually only significant when measuring low-level signals (a few millivolts) over long periods of time, or in difficult environmental conditions.
a process of change, and as in the case with all processes of change in structure determined systems, it follows a course without alternatives in the domain of determinism in which it is brought forth by the distinctions of the observer
A series of individual changes in a single language that move in the same direction in which each change is pre-conditioned by the changes that preceded it and sets up the conditions for the changes that will follow it. Sapir isolated some examples of this in English including leveling case distinctions and fixing word order.
Usually refers to instrument drift, the presumed secular change in gravity caused by changes in the instrument sensor and other internal components. It is usually modeled as an exponential, linear or quadratic function of time.
A gradual change of a measurement with no change in the input signal or operating conditions. Common contributors to drift are temperature and time, and are usually expressed in ppm or % of unit measure. (Also, see Temperature Coefficient.)
In a power supply,Drift is a failure of the feedback loop to control the voltage or current because the gain of the feedback loop is changing for some reason, for example the sense resistor is changing resistance due to heating.
One process in which influenza virus undergoes mutation. The amount of change can be subtle or dramatic, but eventually as drift occurs, a new variant strain will become dominant. This process allows influenza viruses to change and re-infect people repeatedly through their lifetime and is the reason influenza virus strains in vaccine must be updated each year. See shift.
The change in output voltage of a SMPS over a specified period of time, following a warm-up period, with all other operating parameters such as input voltage, load and ambient temperature held constant.
A gradual change of the hemagglutinin or neuraminidase proteins on the surface of a particular strain of influenza virus that occurs in response to host antibodies in humans who have been exposed to it. It occurs on an ongoing basis in both type A and type B influenza strains and necessitates ongoing changes in influenza vaccines.
a gradual, normally permanent change in a signal's or component's characteristics; this is due to aging plus changes in the environment and other factors external to the component (usually an oscillator).
In linguistics, drift is the variation of speech. Edward Sapir gives the example "Whom did you see?" which is grammatically correct but is generally replaced by "Who did you see?" Structural symmetry seems to have brought about the change: all other wh- words are monomorphic.
Partial loss of traction resulting in the car sliding slightly wide of where you point it. This can be the fastest way through a corner, provided that you maintain mostly forward momentum and only deviate from the direction your tires are pointed by about 6-12%. Slicks can maintain speed at a higher slip angle than street tires. Rule of thumb: if you are going more sideways than forward, or losing speed, you are drifting too much. If you aren't drifting at all, you are going too slow.
The number of boards that you vary from straight in your approach to the foul line. For example, if you place the inside edge of your slide foot on board 15 on the approach, but your inside edge slides on the 12 board at the foul line, you have a three board inward drift.
A stylized technique where the driver accelerates down a straight, then intentionally slides the car sideways down a corner. A popular sport in Japan, drifting relies on a controlled loss of traction and uses oversteering, where the rear of the car spins in a wider arc than the front.
When the odds of a horse increase. A drifter is a horse which, for example, is given an opening price of 2-1 but is unfavoured by investors, so its odds are increased to say 4-1 in an effort to attract investors. Drifting is also known as easing.
Odds that 'Lengthen', are said to have drifted, or be 'On the Drift'. Each Way - UK term for betting on a team or individual to win and/or 'Place'. The bet is automatically split into two, 50:50 and the odds for each bet are different. If your selection wins, the Place bet wins automatically. Therefore, you could win either both bets or Place only.
move about aimlessly or without any destination, often in search of food or employment; "The gypsies roamed the woods"; "roving vagabonds"; "the wandering Jew"; "The cattle roam across the prairie"; "the laborers drift from one town to the next"; "They rolled from town to town"
Also referred to as "windage" or "carryover" - Water lost from the tower as liquid droplets carried out by the exhaust air; usually expressed as a percentage of the circulation rate. "Drift eliminators" cut down "drift".
Water lost as liquid droplets entrained in the exhaust air. It is independent of water lost by evaporation. Units may be in lbs./hr. or percentage of circulating water flow. Drift eliminators control this loss.
The change in accuracy of a pressure reading over time. A transducer/transmitter can gradually go out of calibration after continued use which is called "drift". The amount of drift experienced by a transducer / transmitter may or may not have an effect on the customers' application. If little or no drift is a major requirement for your customer, be sure to note this, so the correct unit can be supplied.
A magnetically trapped ion or electron moves as if it were attached to a magnetic field line. Drift is one of the features of such motion, namely its slow shift from one magnetic field line to its neighbor. In the Earth's magnetic field, such drifts gradually move particles all the way around Earth. Viewed from far above the north magnetic pole, ions drift around the Earth clockwise, electrons counter-clockwise, resulting in an electric current circling the Earth, the ring current.
While driving, disturbing forces may modify the vehicle's trajectory whether it be on a straight line or on a bend. Drift angle is defined as the one between the trajectory that the wheel would describe without disturbing forces and the one really followed.
The angle which the line of a ship's motion makes with the nearest meridian, when she drives with her side to the wind and waves when laying to. It also implies the distance which the ship drives on that line.
DrIFT is a type sensitive preprocessor for Haskell. It extracts type declarations and directives from modules and applies rules to them which generate code. It is intended that the user can add new rules as required. DrIFT automates instance derivation for classes that aren't supported by the standard compilers.
The condition caused by failure of the airplane to follow the intended flightline due to crosswinds although the nose of the aircraft is pointed in the right direction. Indicated in vertical photography by the photographs creating a stairstep pattern along the flightline.
The movement in a bowler's approach from right to left or from left to right. Drifts can result in arriving on the same board at the foul line that the bowler starts from at his address, or it can result in a significant difference from where the bowler started.
Refers to the controlled momentum of a puck on the attacker's side of the table. Drifts are primarily used to disguise attacks, by releasing the puck at different points in the drift and by striking the puck at angles that differ from the drift. The "Circle (diamond) drift" and "L-drift" are two of the more commonly used drifts.
The difference in signal seen from one side of the plate to the other. This is often due to a delay in the addition of reagents. The left side of the plate (where reagents were added first) will have longer for the binding reaction to occur than the right side of the plate. This can generally be avoided by adding reagents in a timely manner without interruption.