Results 41 to 50 of about 171,148 (274)

On imputation for planned missing data in context questionnaires using plausible values: a comparison of three designs

open access: yesLarge-scale Assessments in Education, 2018
Background This paper extends a recent study by Kaplan and Su (J Educ Behav Stat 41: 51–80, 2016) examining the problem of matrix sampling of context questionnaire scales with respect to the generation of plausible values of cognitive outcomes in large ...
David Kaplan, Dan Su
doaj   +1 more source

Genetic attenuation of ALDH1A1 increases metastatic potential and aggressiveness in colorectal cancer

open access: yesMolecular Oncology, EarlyView.
Aldehyde dehydrogenase 1A1 (ALDH1A1) is a cancer stem cell marker in several malignancies. We established a novel epithelial cell line from rectal adenocarcinoma with unique overexpression of this enzyme. Genetic attenuation of ALDH1A1 led to increased invasive capacity and metastatic potential, the inhibition of proliferation activity, and ultimately ...
Martina Poturnajova   +25 more
wiley   +1 more source

Pairwise Balanced Designs From Cyclic PBIB Designs [PDF]

open access: yes, 2021
A pairwise balanced designs was constructed using cyclic partially balanced incomplete block designs with either (λ1 – λ2) = 1 or (λ2 – λ1) = 1. This method of construction of Pairwise balanced designs is further generalized to construct it using cyclic ...
Desai, N. R.   +2 more
core   +1 more source

RIPK4 function interferes with melanoma cell adhesion and metastasis

open access: yesMolecular Oncology, EarlyView.
RIPK4 promotes melanoma growth and spread. RIPK4 levels increase as skin lesions progress to melanoma. CRISPR/Cas9‐mediated deletion of RIPK4 causes melanoma cells to form less compact spheroids, reduces their migratory and invasive abilities and limits tumour growth and dissemination in mouse models.
Norbert Wronski   +9 more
wiley   +1 more source

Experimentos em parcelas subdivididas com tratamentos primários em blocos incompletos parcialmente balanceados I: uma solução das equações normais Split-plot experiments with main treatments in partially balanced incomplete blocks I: a solution of the normal equations

open access: yesScientia Agricola, 1995
O objetivo deste trabalho foi realizar um estudo para obtenção de uma solução adequada das equações normais de experimentos em parcelas subdivididas com tratamentos primários dispostos segundo uma estrutura de blocos incompletos parcialmente balanceados ...
A.R. de Morais, M.C Stolf Nogueira
doaj   +1 more source

Enzymatic degradation of biopolymers in amorphous and molten states: mechanisms and applications

open access: yesFEBS Open Bio, EarlyView.
This review explains how polymer morphology and thermal state shape enzymatic degradation pathways, comparing amorphous and molten biopolymer structures. By integrating structure–reactivity principles with insights from thermodynamics and enzyme engineering, it highlights mechanisms that enable efficient polymer breakdown.
Anđela Pustak, Aleksandra Maršavelski
wiley   +1 more source

A best–worst scaling experiment to prioritize concern about ethical issues in citizen science reveals heterogeneity on people-level v. data-level issues

open access: yesScientific Reports, 2021
“Citizen science” refers to the participation of lay individuals in scientific studies and other activities having scientific objectives. Citizen science gives rise to unique ethical issues that stem from the potentially multifaceted contributions of ...
Christi J. Guerrini   +3 more
doaj   +1 more source

Construction of a reading literacy test item bank for fourth graders based on item response theory

open access: yesFrontiers in Psychology, 2023
IntroductionReading literacy is not only central to students’ academic success during their school years but also crucial to their personal development in their later life.
Qishan Chen   +6 more
doaj   +1 more source

Recursive Methods for Construction of Balanced N-ary Block Designs [PDF]

open access: yes, 2005
2000 Mathematics Subject Classification: Primary 05B05; secondary 62K10.This paper presents a recursive method for the construction of balanced n-ary block designs.
Bousseboua, M., Gheribi-Aoulmi, Z.
core  

BLOCK DESIGNS UNDER AUTOCORRELATED ERRORS [PDF]

open access: yes, 2011
This research work is focused on the balanced and partially balanced incomplete block designs when observations within blocks are correlated. The topic for this dissertation was motivated by a problem in pharmaceutical research, when several treatments ...
Shu, Xiaohua
core   +1 more source

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