Results 51 to 60 of about 45,141 (310)

On the Equation of Diffusion [PDF]

open access: yesProceedings of the National Academy of Sciences, 1937
Under the title "The Analytical Theory of Probability," A. Kolmogoroff [1] published a few years ago a mathematically elegant account of what might be called the general theory of diffusion. As the main result of his analysis, he sets up two differential equations for transition probabilities (see below).
openaire   +3 more sources

Structural instability impairs function of the UDP‐xylose synthase 1 Ile181Asn variant associated with short‐stature genetic syndrome in humans

open access: yesFEBS Letters, EarlyView.
The Ile181Asn variant of human UDP‐xylose synthase (hUXS1), associated with a short‐stature genetic syndrome, has previously been reported as inactive. Our findings demonstrate that Ile181Asn‐hUXS1 retains catalytic activity similar to the wild‐type but exhibits reduced stability, a looser oligomeric state, and an increased tendency to precipitate ...
Tuo Li   +2 more
wiley   +1 more source

Applying Test Equating Methods

open access: yes, 2017
This book describes how to use test equating methods in practice. The non-commercial software R is used throughout the book to illustrate how to perform different equating methods when scores data are collected under different data collection designs ...
Wiberg, Marie,   +5 more
core   +1 more source

Measuring psychological distress using the 12‐item general health questionnaire and the six‐item Kessler psychological distress scale. Psychometric comparison and equipercentile equating of the two scales

open access: yesInternational Journal of Methods in Psychiatric Research
Objectives This study aimed to examine if the General Health Questionnaire (GHQ)‐12 and Kessler 6 (K6) assess the same underlying construct and to develop a score conversion table for the two scales.
Andreas Lundin   +3 more
doaj   +1 more source

The development of equating application for computer based in physics HOTS category

open access: yesJournal of Technology and Science Education, 2021
This study aims to develop a score equating application for computer-based school exams using parallel test kits that have 25% anchor items, the items are arranged according to the HOTS (High Order Thinking Skill) category and use a scientific approach ...
Yetti Supriyati   +2 more
doaj   +1 more source

The (Glg)ABCs of cyanobacteria: modelling of glycogen synthesis and functional divergence of glycogen synthases in Synechocystis sp. PCC 6803

open access: yesFEBS Letters, EarlyView.
We reconstituted Synechocystis glycogen synthesis in vitro from purified enzymes and showed that two GlgA isoenzymes produce glycogen with different architectures: GlgA1 yields denser, highly branched glycogen, whereas GlgA2 synthesizes longer, less‐branched chains.
Kenric Lee   +3 more
wiley   +1 more source

New Equating Methods and Their Relationships with Levine Observed Score Linear Equating Under the Kernel Equating Framework

open access: yes, 2010
NEAT design, curvilinear Levine observed score equating (CLOSE), Levine observed score linear equating (LOSLE), Tucker linear equating (TLE), kernel equating (KE), Mean preserving linear transformation (MPLT), Post-stratification equating (PSE),
Paul Holland, Haiwen Chen
core   +1 more source

Evaluating accuracy and bias of different comparative judgment equating methods against traditional statistical equating

open access: yesFrontiers in Education
Traditional common-item or common-person statistical equating cannot always be used for standard maintaining or linking between test forms. In some contexts, comparative judgment (CJ) methods which capture expert judgment of quality of student work on ...
Milja Curcin, Ming Wei Lee
doaj   +1 more source

Penyetaraan Tes UAN: MAengapa dan Bagaimana?

open access: yesCakrawala Pendidikan: Jurnal Ilmiah Pendidikan, 2010
Debates concerning what is right and what is wrong with national final examination (UAN) in Indonesia are not new. National final examination (UAN), a significant process using a test form to measure learning output, has been developed to provide ...
Sukirno Sukirno
doaj   +1 more source

Evolutionary equations and constraints: Maxwell equations [PDF]

open access: yesJournal of Mathematical Physics, 2019
By fixing a reference frame in spacetime, it is possible to split the Euler-Lagrange equations associated with a degenerate Lagrangian into purely evolutionary equations and constraints on the allowed Cauchy data with respect to the notion of space and time associated with the given reference frame.
F. M. Ciaglia   +3 more
openaire   +3 more sources

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