EMF

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force

 [fors]
energy or power; that which originates or arrests motion or other activity.
Forces resulting from a fall are transmitted up to the spine through the long leg bones and pelvis. From McQuillan et al., 2002.
electromotive force the force that, by reason of differences in potential, causes a flow of electricity from one place to another, giving rise to an electric current.
reserve force energy above that required for normal functioning. In the heart it is the power that will take care of the additional circulatory burden imposed by bodily exertion.
shearing f's see shear.
van der Waals f's the relatively weak, short-range forces of attraction existing between atoms and molecules, which results in the attraction of nonpolar organic compounds to each other (hydrophobic bonding).

EMF

Abbreviation for electromotive force.

EMF

electromotive force.

EMF

abbreviation for electromotive force.

EMF

Abbreviation for electromotive force.

field

(feld)
1. An open expanse of land.
2. A discipline or an area of study.
3. A region of space in which a given force operates or a given condition exists.
4. A place of natural conditions, as opposed to a controlled environment, such as a laboratory or a hospital.

auditory field

The spatial region in which a given person can hear sounds.

cortical field

A segment of the cerebral cortex that carries out a given function. For example, the front of the parietal lobe -- the postcentral gyrus -- can be called a primary somatosensory field, and the parietal cortex farther back can be called an association field.

dry field

A colloquial term for a bloodless surgical field in which the surgeon's vision is not obscured.

electric field

The region in space in which the attractive or repulsive effects of a given electric charge have an effect.

electromagnetic field

Abbreviation: EMF
The region in space in which the photons produced by moving electric charges have an effect. EMFs can be produced by power lines, radio waves, and microwaves. The energy produced in an EMF increases as the frequency of the photons increases, and EMFs produced by very high frequency photons (e.g., xrays and gamma rays) are sufficiently energetic to induce cancer.

eye field

Any region of the cortex concerned with sensation from or movement of an eye.

field of fixation

The widest limits of vision in all directions within which the eyes can fixate.

field of Forel

One the layers of axons -- many originating in the globus pallidus -- that form the lower (inferior) border of the thalamus in the brain. Together, the axons and neighboring neuronss are called the subthalamic reticular nucleus.
Synonym: Forel's field, prerubral field

free field

A space in which there are no surfaces that reflect specific frequencies of sound.

gradient-induced electric field

An electric field that may surround an object placed in a rapidly changing magnetic environment, such as one generated by a magnetic resonance imaging device.

gravitational field

The region in space in which the attractive effects of a given mass have an effect.

hand field

Any region of the cortex concerned with sensation from or movement of a hand.

heart field

The region of the embryo destined to produce the heart.

high-power field

The portion of an object seen when the high-magnification lenses of a microscope are used.

hippocampal field

Any of the three contiguous, but histologically distinguishable, sheets of cells that form the cortex of the hippocampus; the fields are usually called CA1, CA2, and CA3.

low-power field

The portion of an object seen when the low-magnification lenses of a microscope are used.

lung field

The region in the body containing a lung. Often, 'lung field' refers to the section of a medical image (e.g., chest xray) that shows a lung.

magnetic field

The space permeated by the magnetic lines of force surrounding a permanent magnet or coil of wire carrying electric current.

prerubral field

Field of Forel.

pulsing electromagnetic field

Abbreviation: PEMF
An alternating electrical current used to produce an electromagnetic field. This may induce healing when applied to a fractured bone. The field is applied noninvasively to the affected limb. It may be moderately helpful in treating bony nonunion. See: diathermy

receptive field

A description of the effective stimuli of a given neuron. For sensory receptor neurons, the receptive field is the type of effective stimulation (e.g., light, sound, mechanical pressure) and the range of sensitive locations (e.g., center of visual field, left auditory field, tip of right thumb).

sterile field

A body surface, along with surrounding drapes or towels, within which an operation may safely take place without introducing potentially hazardous microorganisms into a patient.

Patient care

The field is prepared by meticulously washing and scrubbing the patient on whom an operation will be performed with disinfectant solution. Sterile drapes and towels are placed over the patient to cover any unprepared skin or clothing with sterilized fabric. All surgical instruments that enter the operative theatre are cleansed according to decontamination and sterilization practices. Finally, all surgical personnel scrub for prescribed time periods with disinfectants before entering the operating room. They must wear sterile gloves, gowns, masks and shoe covers and replace these if any of them contact nonprepared items during surgery.

surgical field

The area in which an operation is performed. This field is prepared and covered to maintain sterility during operations.

useful field of view

Abbreviation: UFOV
A test of visual attention that measures the space in which an individual can receive information rapidly from two separate sources. It is a strong predictor of accidents in older drivers. Training can expand the useful field of view and increase the visual processing speed of an elderly person.

field of vision

Visual field.
Enlarge picture
VISUAL FIELD

visual field

The area within which objects may be seen when the eye is fixed.
Synonym: field of vision See: illustration; perimetry

electromagnetic field

Abbreviation: EMF
The region in space in which the photons produced by moving electric charges have an effect. EMFs can be produced by power lines, radio waves, and microwaves. The energy produced in an EMF increases as the frequency of the photons increases, and EMFs produced by very high frequency photons (e.g., xrays and gamma rays) are sufficiently energetic to induce cancer.
See also: field

force

(fors) [Fr. force, fr L. fortia]
A push or pull exerted on an object, changing its speed or direction. The metric unit for force is the newton, which equals 0.225 lb of force.

catabolic force

Energy produced by metabolism of food.

centrifugal force

The force that impels a thing, or parts of it, outward from the center of rotation.
See: centrifuge

electromotive force

Abbreviation: EMF
Energy that causes flow of electricity in a conductor. The energy is measured in volts.

G force

The gravitational constant. In aerospace medicine, the term indicates the forces acting on the human body during acceleration in certain flight maneuvers. Thus a force of 2 positive G means that the aviator is being subjected to a force twice that of gravity with a doubling of weight in that condition, i.e., the force against the seat is 2 G. G force may be in any axis and may be negative or positive.

maximum inspiratory force

Abbreviation: MIF
The output of the inspiratory muscles measured in negative centimeters of water pressure. It is measured by having the subject inhale from a tube connected to a manometer under conditions of no flow. Synonym: maximum inspiratory pressure; negative inspiratory force

negative inspiratory force

Maximum inspiratory force.

psychic force

Force generated apart from physical energy.

reserve force

The energy available above that required for normal functioning of the heart.

electromotive force

Abbreviation: EMF
Energy that causes flow of electricity in a conductor. The energy is measured in volts.
See also: force

EMF,

EMF

Abbreviation for electromotive force.

EMF,

n the abbreviation for erythrocyte-maturing factor.

EMF

electromotive force.
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The allocation of fresh money by regional equity funds has helped to propel the benchmark MSCI Emerging Markets Free Index to a year to date gain of 10.
dollar terms, outperforming the MSCI Emerging Markets Free Index, which increased 6%.
Its Active Emerging Markets strategy seeks to outperform its benchmark - primarily the MSCI Emerging Markets Free Index - in a highly risk-controlled process.

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