Results 11 to 20 of about 60,131 (235)

Microstructure of a cement matrix composite reinforced with polypropylene fibers

open access: yesMateriales de Construccion, 2004
The present investigation deals with the microstructural characterization of a composite material, which is comprised of polypropylene fibers in an cement matrix, by means of environmental scanning electron microscopy (ESEM) and field emission scanning ...
J. M. Rincón   +4 more
doaj   +1 more source

NMR and Electron Microscopy Studies of Soybean Seeds, Soybean Proteins, and Oil for Improved Utilization in Foods and Feeds [PDF]

open access: yes, 2011
NMR, NIR and EM techniques are suitable methods of measuring protein and oil content in soybeans. After completion of a measurement with NMR or NIR, a soybean sample could be either replanted or consummated.
Doina M. Costescu, I. C. Baianu
core   +2 more sources

Genetic analysis and fine mapping of the RK4 gene for round kernel in rice (Oryza sativa L.)

open access: yesCzech Journal of Genetics and Plant Breeding, 2017
Grain shape of rice is an important trait for both yield and quality. A rice rk4 (round kernel) mutant was obtained from the japonica variety Zhonghua 11 by radiation of 60Co-γ.
Shengqiang LI   +5 more
doaj   +1 more source

Validation of L2 grit among Chinese EFL high school students and its enduring effect on achievements: A bifactor model approach

open access: yesFrontiers in Psychology, 2022
The current study seeks to validate L2 grit measure among 637 Chinese senior middle school students using a bifactor modeling approach. To do so, we first assessed and compared four alternative measurement models including CFA, bifactor CFA, ESEM, and ...
Eerdemutu Liu, Junju Wang, Sachurina Bai
doaj   +1 more source

Transverse fracture properties of green wood and the anatomy of six temperate tree species [PDF]

open access: yes, 2016
© Institute of Chartered Foresters, 2016. All rights reserved. The aim of this study was to investigate the effect of wood anatomy and density on the mechanics of fracture when wood is split in the radial-longitudinal (RL) and tangential-longitudinal (TL)
Cattaneo, Marco E. G. V.   +3 more
core   +1 more source

A guide to exploratory structural equation modeling (ESEM) and bifactor-ESEM in body image research

open access: yesBody Image, 2023
Traditionally, assessments of factor validity of body image instruments have relied on exploratory or confirmatory factor analysis. However, the emergence of exploratory structural equation modeling (ESEM), a resurgence of interest in bifactor models, and the ability to combine both models (bifactor-ESEM) is beginning to shape the future of body image ...
Viren Swami   +2 more
openaire   +2 more sources

Exploratory structural equation modeling: a streamlined step by step approach using the R Project software

open access: yesBMC Psychiatry, 2023
Confirmatory Factor Analysis (CFA) has been a popular yet limited approach to assessing latent factor structures. Despite items rarely loading exclusively on one latent factor in multifactorial scales, CFA assumes all indicators/items should load ...
Maria Prokofieva   +4 more
doaj   +1 more source

Bifactor exploratory structural equation modeling: A meta-analytic review of model fit

open access: yesFrontiers in Psychology, 2022
Multivariate behavioral research often focuses on latent constructs—such as motivation, self-concept, or wellbeing—that cannot be directly observed. Typically, these latent constructs are measured with items in standardized instruments.
Andreas Gegenfurtner
doaj   +1 more source

Measuring time perspective in adolescents : can you get the right answer by asking the wrong questions? [PDF]

open access: yes, 2015
Time perspective continues to evolve as a psychological construct. The extant literature suggests that higher future orientation and lower present orientation are associated with better developmental outcomes. However, the extant literature also suggests
McKay, Michael T.   +5 more
core   +1 more source

Measuring the classroom level of the Dynamic Model of Educational Effectiveness through teacher self-report: development and validation of a new instrument

open access: yesFrontiers in Education, 2023
In the Dynamic Model of Educational Effectiveness, classroom-level effectiveness factors are assessed through observations or aggregated students’ ratings.
Christophe Dierendonck
doaj   +1 more source

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