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A questionnaire is a research instrument that consists of a set of questions (or other types of prompts) for the purpose of gathering information from respondents through survey or statistical study. A research questionnaire is typically a mix of close-ended questions and open-ended questions.
Historically, the definition of a scientific instrument has varied, based on usage, laws, and historical time period. [1] [2] [3] Before the mid-nineteenth century such tools were referred to as "natural philosophical" or "philosophical" apparatus and instruments, and older tools from antiquity to the Middle Ages (such as the astrolabe and pendulum clock) defy a more modern definition of "a ...
used to separate particles dispersed in a liquid according to their molecular mass: Electrophoresis apparatus: used to detect and classify serum proteins or proteins from any other source; also used for DNA separation Chromatography: • Gas chromatography or Gas liquid chromatography (GLC) • Planar chromatography • Paper chromatography
Military instruments as a class draw on most of the categories of instrument described throughout this article, such as navigation, astronomy, optics, and imaging, and the kinetics of moving objects. Common abstract themes that unite military instruments are seeing into the distance, seeing in the dark, knowing an object's geographic location ...
The invention of climate research through the use of satellite remote telemetry began in the 1960s through development of space probes to study other planets. During the U.S. economic decline in 1977, with much of NASA 's money going toward the shuttle program, the Reagan Administration proposed to reduce spending on planetary exploration.
1 Instrument list. 2 Image gallery. 3 References. ... This list is incomplete; you can help by adding missing items. (August 2008) Instrument list. Instrument
Survey methodology is "the study of survey methods". [1] As a field of applied statistics concentrating on human-research surveys, survey methodology studies the sampling of individual units from a population and associated techniques of survey data collection, such as questionnaire construction and methods for improving the number and accuracy of responses to surveys.
The instruments/sensors produced by the bioinstrumentation field can convert signals found within the body into electrical signals that can be processed into some form of output. [3] There are many subfields within bioinstrumentation, they include: biomedical options, creation of sensor, genetic testing , and drug delivery. [ 4 ]