confirmatory factor analysis a practical introduction
báo cáo hóa học:" A Rasch and confirmatory factor analysis of the General Health Questionnaire (GHQ) - 12" docx
Ngày tải lên :
20/06/2014, 16:20
... 10%, as well as uncertain, missing or not applicable 12.5%) Data regarding patient age was available for 2804 patients The average age of these patients was 57.42 years (females = 56.96, males ... [35] Rasch Analysis of the GHQ-8 A separate Rasch analysis was undertaken for each of the two GHQ-8 factors (Social Dysfunction, and Anxiety and Depression) using the same methodology as described ... either factor of the GHQ-8 for any of the subgroup analyses Confirmatory Factor Analysis The Likert scoring method with collapsed categories for item 11 was used in the Confirmatory Factor Analysis...
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báo cáo khoa học:" An examination of the psychometric structure of the Multidimensional Pain Inventory in temporomandibular disorder patients: a confirmatory factor analysis" docx
Ngày tải lên :
11/08/2014, 23:22
... loadings, standard errors, standard residuals, the statistical significance of each parameter and square multiple correlation [29] Finally, alpha de Cronbach was calculated to establish the internal consistency ... test statistics and standard errors in covariance structure analysis In Latent variables analisys: Applications for developmental research Edited by: Von Eye A, Clogg CC Thousand Oaks, CA: Sage; ... analysis, a latent variable is a factor that is hypothesised from the observed variables and can be affected by other variables or other factors Due to the small sample size, the primary estimation...
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A Practical Introduction to Structure, Mechanism, and Data Analysis - Part 2 pptx
Ngày tải lên :
13/08/2014, 07:20
... of acids and bases: a L ewis acid is any substance that can act as an electron pair acceptor, and a L ewis base is any substance that can act as an electron pair donor In many enzymatic reactions, ... Brønsted—Lowry classification, an acid is any substance that can donate a proton, and a base is any substance that can accept a proton by reacting with a Brønsted—Lowry acid After donating its proton, a Brønsted—Lowry ... example, that the product of an unfavorable reaction was also a reactant for a thermodynamically favorable reaction As long as the absolute value of G was greater for the second reaction, the overall...
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A Practical Introduction to Structure, Mechanism, and Data Analysis - Part 3 pot
Ngày tải lên :
13/08/2014, 07:20
... can be an oversimplified means of data GRAPHIC ANALYSIS OF EQUILIBRIUM LIGAND BINDING DATA 93 analysis that does not account adequately for the curvature in these plots Additionally, nonlinear ... binding and washing steps are greatly facilitated by use of vacuum manifolds of various types that are now commercially available (Figure 4.1 5A) With this apparatus, the membrane sits above a vacuum ... have equal concentrations of ligand at the initiation of the experiment) The chambers are then sealed, and the apparatus is place on an orbital rocker, or a mechanical rotator, in a thermostated...
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A Practical Introduction to Structure, Mechanism, and Data Analysis - Part 4 ppsx
Ngày tải lên :
13/08/2014, 07:20
... noncovalently associated as a multiprotein complex This supercomplex, referred to as CAD, comprises the enzymes carbamyl phosphate synthase, aspartate transcarbamylase, and dihydroorotase Because the active ... initial experiments with a limited number of data points that span as broad a range of substrate concentrations as possible (at least a 100-fold substrate concentration range) to obtain a rough ... diffusion barrier to rapid catalysis 5.6 EXPERIMENTAL MEASUREMENT OF kcat AND Km 5.6.1 Graphical Determinations from Untransformed Data The kinetic constants V and K are determined graphically with...
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A Practical Introduction to Structure, Mechanism, and Data Analysis - Part 5 docx
Ngày tải lên :
13/08/2014, 07:20
... TRANSITION STATE STABILIZATION 165 Table 6.2 Some examples of electrophilic catalysis in enzymatic reactions Enzyme Acetoacetate decarboxylase Aldolase Aspartate aminotransferase Carbonic anhydrase ... by acting as Brønsted—Lowry acids and bases in what is referred to as general acid and general base catalysis For catalysis by small molecules (nonenzymatic reactions), general acid/ base catalysis ... of reaction for (A) a general base-catalyzed reaction and (B) a general acid-catalyzed reaction itself Identification of the group(s) participating in general acid/base catalysis in enzymes has...
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A Practical Introduction to Structure, Mechanism, and Data Analysis - Part 6 pot
Ngày tải lên :
13/08/2014, 07:20
... noise and having a reasonable signal to Figure 7.10 Deviation from Beer’s law Over a small concentration range, the absorption at some analytical wavelength tracks linearly with analyte concentration, ... recommended names, alternative names, catalytic activities, information on cofactor utilization, and associated diseases for a very large collection of enzymes A complete description of the data bank and ... spectroscopy as an analytical tool is that the absorption of a molecule at a particular wavelength can be related to the concentration of that molecule in solution, as described by Beer’s law: A : cl...
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A Practical Introduction to Structure, Mechanism, and Data Analysis - Part 7 pdf
Ngày tải lên :
13/08/2014, 07:20
... formation by HPLC, one typically measures the integrated area under a peak in the chromatograph and compares it to a calibration curve of the area under the peak as a function of mass for a standard ... commonly used alternative methods are available to quantify peaks from strip-chart recordings The first is to measure the peak height rather than integrated area as a measure of analyte mass This is ... the antibody Secondary antibodies bearing a variety of labels can be purchased A popular strategy is to use a secondary antibody that has been covalently labeled with biotin, a ligand that binds...
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A Practical Introduction to Structure, Mechanism, and Data Analysis - Part 8 docx
Ngày tải lên :
13/08/2014, 07:20
... quantitative structure—activity relationships (QSAR) was first championed by Hansch and his coworkers (Hansch, 1969; Hansch and Leo, 1979) In a typical QSAR study, a series of analogues of a lead ... 2,4-diaminopyrimidines (B) as inhibitors of the dihydrofolate reductase from L casei [Data from Coats et al (1984).] vibrational frequencies for the reactant and transition state species that accompany heavy isotope ... double-reciprocal plot for an uncompetitive inhibitor at varying concentrations appears as a series of parallel lines that intersect the y axis at different values, as illustrated in Figure 8.8 For an uncompetitive...
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A Practical Introduction to Structure, Mechanism, and Data Analysis - Part 9 ppt
Ngày tải lên :
13/08/2014, 07:20
... 2695 Cha, S., Agarwal, R P., and Parks, R E., Jr (1975) Biochem Pharmacol 24, 2187 Copeland, R A (1994) Methods of Protein Analysis, A Practical Guide to L aboratory Protocols, Chapman & Hall, ... formation of a tetrahedral transition state involving a peptide carbonyl carbon of the substrate and an active site serine residue as the attacking nucleophile Several groups have taken advantage ... would invalidate the subsequent data analysis Thus it may be necessary to evaluate several combinations of enzyme, substrate, and inhibitor concentrations to find an appropriate range of each for...
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A Practical Introduction to Structure, Mechanism, and Data Analysis - Part 10 doc
Ngày tải lên :
13/08/2014, 07:20
... W Perrella, Anal Biochem 174, 437 (1988) Graphfit A commercial package for data management and graphic display of enzyme kinetic data and other scientific data graphing This program has extensive ... type and relevant kinetic constants, as well as statistical analyses of one’s data Reference: W W Cleland, Methods Enzymol 63, 103 (1979) Enzfitter A commercial package for data management and graphic ... repeated at increasing concentrations of A and AX, to keep the ratio [A] /[AX] constant (i.e., to avoid a shift in the position of the equilibrium) As the amounts of A and AX are changed, the rate...
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A Practical Introduction to OPtical Mirieralogy ppt
Ngày tải lên :
14/03/2014, 22:20
... this alteration appears as an area of cloudiness within the transparent feldspar grain The alteration may be so advanced that the mineral is completely replaced by a new mineral phase For example, ... grit and water on a glass or a metal surface Polishing the surface using diamond grit and an oily lubricant on a relatively hard 'paper' lap Buffing the surface using gamma alumina powder and water ... replacement of some of the alkali feldspar by quartz Associations of feldspar , usually plagioclase but occasionally alkali feldspar, and quartz in which the feldspar and quartz are intercalated...
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A practical introduction to programming and problem solving 3 edition
Ngày tải lên :
23/03/2014, 15:53
... variables, similar to what is in the Workspace Window) clear clears out all variables so they no longer exist clear variablename clears out a particular variable clear variablename1 variablename2 ... many operators and built-in functions that can be used in interactive expressions 1.1 GETTING INTO MATLAB MATLAB is a mathematical and graphical software package with numerical, graphical, and ... as a variable name Characters are put in an order using what is called a character encoding In the character encoding, all characters in the computer’s character set are placed in a sequence and...
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SQL A Practical Introduction pdf
Ngày tải lên :
29/03/2014, 12:20
... 1.1 "A Collection of Related Data": Databases and Database Management Systems Let's start from basics What is a database? In very general terms, a database is a collection of related data Notice ... be conceptualised as data in a database Using similar reasoning, we can also say that a tome such as a telephone directory is also a database It is a database first, because it is a collection ... CONTENTS INTRODUCTION 1.1 A Collection of Related Data : Databases and Database Management Systems 1.2 1.2.1 1.2.2 The Database as a Collection of Tables: Relational Databases and SQL Tables, Columns...
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social network analysis a methodological introduction
Ngày tải lên :
11/04/2014, 10:03
... component analysis, canonical correlation analysis, or other linear subspace analyses, just as in conventional multivariate analysis (Mardia, Kent, & Bibby, 1979) Of these solutions, linear regression ... Asian Association of Social Psychology and the Japanese Group Dynamics Association Social network analysis Snijders, T A B (2002) Markov Chain Monte Carlo estimation of exponential random graph ... which stands between purely aesthetic and data analytical layout methods are latent space models such as those of Hoff, Raftery, and Handcock (2002) and Handcock, Raftery, and Tantrum (2007) Although...
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confirmatory factor analysis nov 2008
Ngày tải lên :
10/06/2014, 21:20
... what one can establish with CFA (or any other) statistical analysis On the other hand, the validity of measures can be addressed, at least partially, through statistical analysis, and CFA can ... Precision, and Practicality Patrick Dattalo Preparing Research Articles Bruce A Thyer Systematic Reviews and Meta -Analysis Julia H Littell, Jacqueline Corcoran, and Vijayan Pillai Historical Research ... Factor Analysis and (2) unique variance, which is a combination of indicator-specific reliable variance and random error Exploratory factor analysis is often considered a data-driven approach to...
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MATLAB a practical introduction to programming and problem solving
Ngày tải lên :
06/02/2016, 08:23
... Workspace Window) clear clears out all variables so they no longer exist clear variablename clears out a particular variable clear variablename1 variablename2 clears out a list of variables ... operators, characters, variables, and assignment statements Scalars, vectors, and matrices are all introduced as are many built-in functions that manipulate them Chapter 2: Introduction to MATLAB ... in a program, a variable is used The Workspace Window shows variables that have been created One easy way to create a variable is to use an assignment statement The format of an assignment statement...
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a quick introduction to tensor analysis - r. sharipov
Ngày tải lên :
31/03/2014, 15:08
... truth is that formulas (22.6) and (22.8) are written for a general skew-angular coordinate system with a SAB as a basis The standard formulas (22.10) are valid only for orthonormal coordinates with ... we can associate each point A of our space − → with its radius-vector rA = OA Then, having expanded this vector in a basis, we get three numbers that are called the Cartesian coordinates of A Coordinates ... usually calculated ? Can you calculate det (A 1 ) if det A is already known ? Exercise 5.5 What is matrix multiplication ? Remember how it is defined Suppose you have a rectangular × matrix A and...
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introduction to p-adic numbers and p-adic analysis - a. baker
Ngày tải lên :
31/03/2014, 15:19
... a similar proof to the last one It is also the case that sums and products of continuous functions are continuous as in real analysis What makes p-adic analysis radically different from real analysis ... The approach taken is very down to earth and makes few assumptions beyond standard undergraduate analysis and algebra Because of this the course was as self contained as possible, covering basic ... Γ-function and integration and the ζ-function The world of p-adic analysis is in many ways very similar to that of classical real analysis, but it is also startlingly different at times I hope you have...
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