screening

[′skrēn·iŋ] (atomic physics) The reduction of the electric field about a nucleus by the space charge of the surrounding electrons. (electromagnetism) electric shielding (engineering) The separation of a mixture of grains of various sizes into two or more size-range portions by means of a porous or woven-mesh screening media. The removal of solid particles from a liquid-solid mixture by means of a screen. The material that has passed through a screen. (industrial engineering) The elimination of defective pieces from a lot by inspection for specified defects. Also known as detailing.

screening

the use of academic qualifications as a means of selecting among candidates for employment, where it is the general level of academic qualification which is decisive rather than the particular content of the education. In this process, an employer may use educational qualifications, or sometimes also the type of institution attended, as a proxy for ‘general intelligence’, ‘perseverance and motivation’, or other 'social background’, instead of being interested in the specific content of the education received. see also CULTURAL CAPITAL.

According to the screening hypothesis, it is the screening process rather than any direct economic return on education which explains part of the correlation between level of education and level of income. This hypothesis provides an account of the effects of education which is at odds with other hypotheses (compare HUMAN CAPITAL). See also CREDENTIALISM, CULTURAL CAPITAL.

Screening

the sorting on screens of bulk materials according to particle size. Screening is used to separate coal, ore. building materials, and other bulk materials into fractions or to sort out particles of a given size. For example, in the production of crushed gravel (about 200 million cu m in the USSR in 1970). a mass of raw sand and gravel is sorted out into five fractions (70–40 mm. 40–20 mm, 20–10 mm, 10–5 mm, and less than 5 mm). During screening, the material is separated into layers as it moves along the sieve of the screen: the larger the particles, the higher the layer along which they move. Particles that are smaller than the screen openings (so-called lower grade) fall through the openings upon reaching the screen’s surface (screen underflow); larger particles (so-called upper grade) slide along the sieve and form the screen overflow. Because of limitations on the length of the screen, not all particles that are smaller than the sieve openings fall through; some remain in the screen overflow, contaminating it and reducing the quantity of the underflow.

The efficiency of screening depends on many factors: the size and shape of the particles in the initial material and the load it exerts on the screen, the type of screen, and the size and shape of the openings in the sieve, its length, and its angle of inclination. The maximum efficiency of trommels is 60–70 percent: of shaking screens. 70–80 percent; and of vibrating screens, 90–98 percent. Screening on sieves with openings of 3 mm and more is widespread in industry; openings of 1 mm are rarely encountered. Hydraulic classification or air separation is usually used to sort materials containing particles smaller than 1–3 mm. Since screening ensures high-quality sorting, its use is spreading, particularly the use of sieves with small openings.

Screening

A mechanical method of separating a mixture of solid particles into fractions by size. The mixture to be separated, called the feed, is passed over a screen surface containing openings of definite size. Particles smaller than the openings fall through the screen and are collected as undersize. Particles larger than the openings slide off the screen and are caught as oversize. A single screen separates the feed into only two fractions. Two or more screens may be operated in series to give additional fractions. Screening occasionally is done wet, but most commonly it is done dry.

Industrial screens may be constructed of metal bars, perforated or slotted metal plates, woven wire cloth, or bolting cloth. The openings are usually square but may be circular or rectangular. See Mechanical classification, Mechanical separation techniques, Sedimentation (industry)

screening

The application of technical or other means which are intended to detect weapons, explosives or other dangerous devices that may be used to commit an act of unlawful inference (ICAO).

screening

[skrēn´ing] examination or testing of a group of individuals to separate those who are well from those who have an undiagnosed disease or defect or who are at high risk.health screening in the nursing interventions classification, a intervention" >nursing intervention defined as detecting health risks or problems by means of history, examination, and other procedures.multiphasic screening (multiple screening) that in which various diagnostic procedures are employed during the same screening program.prescriptive screening that performed for the early detection of disease or disease precursors in apparently well individuals so that health care can be provided early in the course of the disease or before the disease becomes manifest.screening (omaha) in the omaha system, a target definition in the intervention scheme, denoting individual or group testing procedures, including measurements of vision, hearing, height, weight, development, scoliosis, blood pressure, and other qualities.

screen·ing

(skrēn'ing), 1. To screen (5). 2. Examination of a group of usually asymptomatic people to detect those with a high probability of having a given disease, typically by means of an inexpensive diagnostic test. 3. In the mental health professions, initial patient evaluation that includes medical and psychiatric history, mental status evaluation, and diagnostic formulation to determine the patient's suitability for a particular treatment modality.

screening

(skrē′nĭng)n.1. The examination of a group of usually asymptomatic individuals to detect those with a high probability of having or developing a given disease, typically by means of an inexpensive diagnostic test.2. The initial evaluation of a person, intended to determine suitability for a particular treatment modality.

screening

Drug development
The process by which candidate substances for drug development are evaluated in a battery of assays (screens) designed to detect a specific biological property or activity. Screening can be conducted randomly, and substances tested without preselection criteria (which is highly inefficient) or targeted, where information on a substance with known activity and structure is used as a basis for selecting other similar substances on which to run the battery of tests.

Medspeak
A health service in which all members of a defined and currently asymptomatic population (e.g., sexually active women over age 18 or men over age 50) are evaluated by a screening test to detect a disease process (e.g., cancer (CA) or pre-CA of the uterine cervix in young women, or prostate CA in older men not known to have CA at the time of evaluation). Screening tests measure specific clinical (e.g., blood pressure for hypertension) or lab parameters (e.g., cholesterol for atherosclerosis or blood in stool for colorectal CA). Screening tests have high sensitivities and low specificities, allowing detection of most patients with a morbid condition, while having the acceptable disadvantage of a high rate of false positivity (screening tests by definition have a high sensitivity but low specificity).
Health screening recommendations (US)
Blood-pressure
Measured in normotensive persons every 2 years, all age groups.
Breast Cancer
Breast examination, in women by doctor-every year > age 40; mammography-every 1-2 years, age 35+, every year > age 50.

Cervical cytology
Pap smear every 1-3 years, starting from age of first intercourse.

Cholesterol
Measured-every 5 years, but not in younger subjects.
Colorectal cancer
Faecal-occult blood testing, from age 60 (UK) and age 50 (US).
Prostate
Rectal exam, ideally every year.
Molecular biology
The use of a low-stringency radiolabelled or biotinylated hybridisation probe to detect gene segments of potential interest from genomic or complementary DNA library.

Psychiatry
(1) Assessment to determine the appropriate services for a client.
(2) An assessment used to identify an increased risk of suicide in a group. In primary care settings, suicide screening is nearly worthless.

Trials
(1) The evaluation of individuals for potential enrollment in a trial screening (of sites).
(2) Determining the suitability of an investigative site and personnel to participate in a clinical trial.

screening (of sites)

A clinical trial term for assessing the suitability of an investigative site and personnel to participate in a study.

screening (of subjects)

The process of assessing a large group of potential subjects/patients for enrolment in a trial using a shotgun approach, in which a series of tests—e.g., measurement of cholesterol levels, blood pressure and so on—are used to stratify candidates into yes/no groups before focusing on specific individuals.

screening

Medtalk The evaluation of an asymptomatic person in a population, to detect an unsuspected disease process not known to exist at the time of evaluation; screening tests measure specific parameters–eg, bp–for HTN, sigmoidoscopy–colorectal CA, imaging–eg, mammography–breast CA or lab parameters–eg, cholesterol–CAD, guaiac-positive stools–colorectal CA or Pap smears of the uterine cervix–cervical CA; screening tests in general have high sensitivities and low specificities, which allows detection of most Pts with a morbid condition, while having the acceptable disadvantage of a high rate of false positivity. See Cancer screening, Colorectal screening, Developmental screening, Drug screening, Forensic drug screening, Genetic screening, Industry screening Microalbuminuria screening, Multiphasic screening, Newborn screening Psychiatry An assessment or evaluation to determine the appropriate services for a client. Screening Blood-pressure Measured in normotensive persons-every 2 years, all age groups Breast examination, ♀ By physician-every year > age 40; mammography-every 1-2 years, age 35+, every year > age 50 Cervical cytology Pap smear every 1-3 years, starting at age of first intercourse Cholesterol Measured-every 5 years, but not in younger subjects Prostate Rectal exam, ideally every year

screen·ing

(skrēn'ing) 1. Examination of a group of usually asymptomatic people to detect those with a high probability of having a given disease, typically by means of an inexpensive diagnostic test. 2. mental health Initial patient evaluation that includes medical and psychiatric history, mental status evaluation, and diagnostic formulation to determine the patient's suitability for a particular treatment modality.

screening

The routine examination of numbers of apparently healthy people to identify those with a particular disease at an early stage.

Screening

Process through which carriers of a trait may be identified within a population.Mentioned in: Sickle Cell Disease, Thalassemia

screen·ing

(skrēn'ing) 1. To screen (4)
Synonym(s): Screen (3).2. Examination of a group of usually asymptomatic people to detect those with a high probability of having a given disease, typically by means of an inexpensive diagnostic test.

Patient discussion about screening

Q. What are the screening methods for autism? I have a friend who has an autistic child. My daughter is 5 months old and I was wondering if there are any screening methods that help determine autism.A. The general screening methods for autism are used by parents and pediatricians to evaluate a child’s irregular behavior for his/her age. As a parent, if you see any regression of the child- for instance, he was able to say mom and now he doesn’t say it anymore, or if a child hasn’t started speaking when they should. Those are reasons to go see someone about the possibility of autistic disorder.

Q. How can I lower the damage the cumputer screen is causing my eyes? I work with a computer for long hours every day and so far my sight is still good. Usually after many hours my eyes itch though. All my friends have already ruined their eyes this way and would really like to prevent that... Do you know how?A. When people hardly concentrate on monitors, used to blink a little. Try to use neutral eyedops. Use only TFT monitors. Another good ways has written above :)

Q. What is cage questionnaire in screening of alcoholism and how effective is it? A. CAGE questionnaire is a set of 4 questions to screen alcohol dependent person. A set of 4 question where if 2 are answered the alcoholism is diagnosed with various other tests. There are other type questionnaires like S-MAST, AUDIT, HSS, TWEAK, T-ACE, and CHARM. Questions asked are: (1) Have you ever felt you needed to Cut down on your drinking (2) Have people Annoyed you by criticizing your drinking? (3)Have you ever felt Guilty about drinking (4) have you Ever felt you needed a drink first thing in the morning to steady your nerves or to get rid of a hangover.

More discussions about screening

screening

screen·ing

screening

screen•ing

screening

screening

screen off

screen out

screen out of (something or some place)

screen off

screen out

screening

screening

screening

Screening

Screening

screening

screening

screening

screen·ing

screening

screening

screening (of sites)

screening (of subjects)

screening

screen·ing

screening

Screening

screen·ing

Patient discussion about screening

screening

Screen Stocks

screening

screening

screening

Synonyms for screening

noun the display of a motion picture

Synonyms

Related Words

noun fabric of metal or plastic mesh

Related Words

noun the act of concealing the existence of something by obstructing the view of it

Synonyms

Related Words

noun testing objects or persons in order to identify those with particular characteristics

Related Words