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Activation Analysis definition: A method of chemical analysis based on the detection of characteristic radionuclides following a nuclear bombardment. It is also known as radioactivity analysis. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
activation analysis definition: chemical analytic method based on the detection of characteristic radionuclides following a nuclear bombardment.
Actuarial Analysis definition: The application of probability and statistical methods to calculate the risk of occurrence of any event, such as onset of illness, recurrent disease, hospitalization, disability, or death. It may include calculation of the anticipated money costs of such events and of the premiums necessary to provide for payment of such costs.
Analysis of Variance definition: A statistical technique that isolates and assesses the contributions of categorical independent variables to variation in the mean of a continuous dependent variable.
Analysis of Variance definition: A statistical technique which helps in making inference whether three or more samples might come from populations having the same mean; specifically, whether the differences among the samples might be caused by chance variation.
Bibliometrics definition: The use of statistical methods in the analysis of a body of literature to reveal the historical development of subject fields and patterns of authorship, publication, and use. Formerly called statistical bibliography. (from The ALA Glossary of Library and Information Science, 1983)
Breath Tests definition: Any tests done on exhaled air.
breath test definition: any test done on exhaled air.
Cluster Analysis definition: A set of statistical methods used to group variables or observations into strongly inter-related subgroups. In epidemiology, it may be used to analyze a closely grouped series of events or cases of disease or other health-related phenomenon with well-defined distribution patterns in relation to time or place or both.
Cluster Analysis definition: Methods for grouping objects into subsets such that those within each cluster are more closely related to one another than objects assigned to different clusters.
Discriminant Analysis definition: A statistical analytic technique used with discrete dependent variables, concerned with separating sets of observed values and allocating new values. It is sometimes used instead of regression analysis.
Discriminant Function Analysis definition: A statistical technique used to determine which variables discriminate between two or more naturally groups and to determine whether groups differ with regard to the mean of a variable.
Ethical Analysis definition: The use of systematic methods of ethical examination, such as CASUISTRY or ETHICAL THEORY, in reasoning about moral problems.
Fluorometry definition: An analytical method for detecting and measuring FLUORESCENCE in compounds or targets such as cells, proteins, or nucleotides, or targets previously labeled with FLUORESCENCE AGENTS.
fluorimetry definition: the measurement of fluorescence.
Fluorimetry definition: An analytical method that utilizes ultraviolet light to excite the sample and detects the fluorescence emitted during the return of the sample to its ground state.
Fourier Analysis definition: Analysis based on the mathematical function first formulated by Jean-Baptiste-Joseph Fourier in 1807. The function, known as the Fourier transform, describes the sinusoidal pattern of any fluctuating pattern in the physical world in terms of its amplitude and its phase. It has broad applications in biomedicine, e.g., analysis of the x-ray crystallography data pivotal in identifying the double helical nature of DNA and in analysis of other molecules, including viruses, and the modified back-projection algorithm universally used in computerized tomography imaging, etc. (From Segen, The Dictionary of Modern Medicine, 1992)
Insurance Claim Review definition: Review of claims by insurance companies to determine liability and amount of payment for various services. The review may also include determination of eligibility of the claimant or beneficiary or of the provider of the benefit; determination that the benefit is covered or not payable under another policy; or determination that the service was necessary and of reasonable cost and quality.
Multivariate Analysis definition: A set of techniques used when variation in several variables has to be studied simultaneously. In statistics, multivariate analysis is interpreted as any analytic method that allows simultaneous study of two or more dependent variables.
Radioimmunoprecipitation Assay definition: Sensitive assay using radiolabeled ANTIGENS to detect specific ANTIBODIES in SERUM. The antigens are allowed to react with the serum and then precipitated using a special reagent such as PROTEIN A sepharose beads. The bound radiolabeled immunoprecipitate is then commonly analyzed by gel electrophoresis. Radioimmunoprecipitation assay (RIPA) is often used as a confirmatory test for diagnosing the presence of HIV ANTIBODIES.
Regression Analysis definition: Procedures for finding the mathematical function which best describes the relationship between a dependent variable and one or more independent variables. In linear regression (see LINEAR MODELS) the relationship is constrained to be a straight line and LEAST-SQUARES ANALYSIS is used to determine the best fit. In logistic regression (see LOGISTIC MODELS) the dependent variable is qualitative rather than continuously variable and LIKELIHOOD FUNCTIONS are used to find the best relationship. In multiple regression, the dependent variable is considered to depend on more than a single independent variable.
Regression Method definition: Regression analysis provides a "best-fit" mathematical equation for the relationship between the dependent variable (response) and independent variable(s) (covariates). There are two major classes of regression - parametric and non-parametric. Parametric regression requires choice of the regression equation with one or a greater number of unknown parameters. Linear regression, in which a linear relationship between the dependent variable and independent variables is posited, is an example. The aim of parametric regression is to find the values of these parameters which provide the best fit to the data. The number of parameters is usually much smaller than the number of data points. In contrast, the non-parametric regression requires no such a choice of the regression equation.
ROC Curve definition: A graphic means for assessing the ability of a screening test to discriminate between healthy and diseased persons; may also be used in other studies, e.g., distinguishing stimuli responses as to a faint stimuli or nonstimuli.
Spectrum Analysis definition: The measurement of the amplitude of the components of a complex waveform throughout the frequency range of the waveform. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
Spectroscopy definition: Image where signals are identified and separated according to their frequencies, e.g., to identify individual chemicals, or individual nuclei in a chemical compound.
Spectroscopy definition: The technique of measuring the emission and absorption of different wavelengths (spectra) of visible and non-visible light. This can be done via a spectroscope, which consists of a slit, prism, collimator lens, object lens, and a grating.
Survival Analysis definition: A class of statistical procedures for estimating the survival function (function of time, starting with a population 100% well at a given time and providing the percentage of the population still well at later times). The survival analysis is then used for making inferences about the effects of treatments, prognostic factors, exposures, and other covariates on the function.
Systems Analysis definition: The analysis of an activity, procedure, method, technique, or business to determine what must be accomplished and how the necessary operations may best be accomplished.
Transactional Analysis definition: A psychoanalytic therapy wherein each social transaction is analyzed to determine the involved ego state (whether parent-like, child-like, or adult-like) as a basis for understanding behavior.
Sequence Analysis definition: A multistage process that includes the determination of a sequence (protein, carbohydrate, etc.), its fragmentation and analysis, and the interpretation of the resulting sequence information.
Sequence Analysis definition: The determination of the sequence of component residues in a macromolecule, e.g. amino acids in a protein or nucleotide bases in DNA/RNA or the computational analysis performed to determine the similarities between nonidentical proteins or molecules of DNA or RNA.
Heteroduplex Analysis definition: A method of detecting gene mutation by mixing PCR-amplified mutant and wild-type DNA followed by denaturation and reannealing. The resultant products are resolved by gel electrophoresis, with single base substitutions detectable under optimal electrophoretic conditions and gel formulations. Large base pair mismatches may also be analyzed by using electron microscopy to visualize heteroduplex regions.
Cytogenetic Analysis definition: Examination of chromosomes to diagnose, classify, screen for, or manage genetic diseases and abnormalities. Following preparation of the sample, KARYOTYPING is performed and/or the specific chromosomes are analyzed.
Cytogenetic Analysis definition: Techniques for analysis of chromosomal and subchromosomal properties and structures, such as those to diagnose, classify, screen for, or manage genetic diseases and abnormalities.
Multilevel Analysis definition: The statistical manipulation of hierarchically and non-hierarchically nested data. It includes clustered data, such as a sample of subjects within a group of schools. Prevalent in the social, behavioral sciences, and biomedical sciences, both linear and nonlinear regression models are applied.
Analysis definition: Examination and interpretation; the process of identifying an issue to be understood and addressed, modelling the issue, investigating the model results, interpreting the results, and possibly making a recommendation. The concept also refers to the examination and study of a whole in terms of the parts composing it.
Microchip Analytical Procedures definition: The preparation and analysis of samples on miniaturized devices.
microarray technology definition: hybridization based tool used to analyze how large numbers of genes interact with each other and how a cell's regulatory network controls a vast battery of genes simultaneously; used for genotyping, mapping, sequencing, sequence detection; usually constructed by applying biomolecules onto a slide or chip, labeled with fluorescent probe and scanned with microscope or imaging equipment.
Microarray Analysis definition: The simultaneous analysis, on a microchip, of multiple samples or targets arranged in an array format.
Microarray Analysis definition: Analysis using microarray technology (e.g., cDNA arrays to see gene expression or protein microarrays to profile the pattern of proteins).
Microfluidic Analytical Techniques definition: Methods utilizing the principles of MICROFLUIDICS for sample handling, reagent mixing, and separation and detection of specific components in fluids.
Allelotype Analysis definition: The examination of the extent and variation of allelic loss in polymorphic DNA markers within a sample.
Brightfield Microscopy definition: Brightfield microscopy is a type of light microscopy in which objects are seen against a bright background.
Computer Analysis definition: Data processing largely performed by automatic means.
analysis definition: Used for the identification or quantitative determination of a substance or its constituents and metabolites; includes the analysis of air, water, or other environmental carrier. It excludes the chemical analysis of tissues, tumors, body fluids, organisms, and plants for which "chemistry" is used. The concept applies to both methodology and results. For analysis of substances in blood, cerebrospinal fluid, and urine the specific subheading designating the fluid is used.
AD definition: Datasets used for statistical analysis and reporting by the sponsor. These are submitted in addition to the data tabulation datasets.
Analysis Dataset Domain definition: A subject domain utilized for the submission of information encompassing and representing data, vocabulary or records related to the analysis of a dataset.
Bioelectric Impedance Analysis definition: A method to assess body composition, i.e., the relative percentages of body weight comprised of fat tissue and lean body mass. It is based on the principle that the resistance to an applied electric current is inversely related to the amount of lean body mass within the body. Impedance is greatest in fat tissue, which contains only 10-20% water, while lean body mass, which contains 70-75% water, allows the signal to pass much more easily.
Amplified Fragment Length Polymorphism Analysis definition: The detection of RESTRICTION FRAGMENT LENGTH POLYMORPHISMS by selective PCR amplification of restriction fragments derived from genomic DNA followed by electrophoretic analysis of the amplified restriction fragments.
analysis of variance definition: [1] Mathematik/Statistik: Varianzanalyse
analysis definition: [1] Analyse [2] Mathematik: Analysis
analysis definition: Analyse.
Analysis definition: [1] grundlegendes Teilgebiet der Mathematik, welches sich unter anderem mit Differentiation und Integration sowie den Eigenschaften von Funktionen beschäftigt
Untersuchung definition: [1] die genauere Betrachtung, Beobachtung oder das Betasten zur Bestimmung eines Sachverhalts oder Objektes
Analyse definition: [1] ganzheitliche, systematische Untersuchung, bei der das untersuchte Objekt zergliedert und in seine Bestandteile zerlegt wird und diese anschließend geordnet, untersucht und ausgewertet werden. Auch die Beziehungen der einzelnen Elemente und deren Integration werden berücksichtigt.
Kombinatorik definition: [1] Mathematik: mathematische Disziplin, die sich mit der Frage befasst, welche Möglichkeiten (Kombinationen) es gibt, eine bestimmte Anzahl von Dingen miteinander zu kombinieren
Kapitalismusanalyse definition: [1] wissenschaftliche Analyse des Kapitalismus [2] Karl Marx' Analyse der bürgerlichen Produktionsweise [3] Reflexion über das Phänomen oder den Begriff Kapitalismus
Analysis definition: Analyse.
analyse definition: solution d’un tout en ses parties.
analyse definition: Procédé de raisonnement qui va de la connaissance des parties à celle du tout, des idées particulières aux idées générales, et qui est l’opposé de la synthèse.
analyse definition: Recherche, détermination, voire quantification, des éléments d’un corps composé.
analyse definition: Décomposition d’une phrase en ses éléments grammaticaux, tels que le nom, l’article, le pronom, le verbe, etc.
analyse definition: Décomposition d’une proposition en ses parties, telles que le sujet, le verbe, l’attribut, etc.
analyse definition: Emploi pour la démonstration d’un théorème, ou la solution d’un problème, du calcul algébrique, du calcul différentiel ou du calcul intégral.
analyse definition: Résumé, précis raisonné d’un ouvrage d’esprit.