Results 21 to 30 of about 4,734,824 (293)

Investigating the Relative Impact of Different Sources of Measurement Non-Equivalence in Comparative Surveys

open access: yesSurvey Research Methods, 2020
Different factors are known to affect the comparability of multinational, multicultural and multiregional (‘3MC’) survey data. These include factors relevant to the design of the questionnaire in different contexts (such as cultural differences in how a
Caroline Roberts   +2 more
doaj   +1 more source

The relationship between self-efficacy and problem-solving ability in biology learning at the senior high school

open access: yesBiosfer
This study aims to examine the relationship between self-efficacy and problem-solving ability in the topic of the human reproductive system at the senior high school level (SMA). The research employed a quantitative correlational design.
Dina Maulina   +6 more
doaj   +1 more source

Investigating interfacial cracks in bi-materials through a 4-point bending model analysis [PDF]

open access: yesTheoretical and Applied Mechanics
This study focuses on examining the failure behavior of interfacial cracks in bimaterial structures. Bimaterials present a unique challenge due to their composition, consisting of two materials that can be homogeneous and isotropic, with a specific ...
Mankour Abdeljelil, Belabbes Bachir B.
doaj   +1 more source

A thermodynamically consistent derivation of a frictional-damage cohesive-zone model with different mode i and mode II fracture energies [PDF]

open access: yes, 2015
The present paper deals with the derivation of an interface model characterized by macroscopic fracture energies which are different in modes I and II, the macroscopic fracture energy being the total energy dissipated per unit of fracture area.
Serpieri, R   +9 more
core   +1 more source

Curve fitting of mixed-mode isopachics

open access: yes, 2009
Recent work has focused on exploiting the observation that the stress-sum contours (isopachics), obtained from TSA, in the vicinity of the tip take the form of a simple curve – the cardioid.
Barton, Janice .M.   +4 more
core   +1 more source

A Comprehensive Mixed-Mode Time-Domain Load- and Source-Pull Measurement System [PDF]

open access: yes, 2010
We present a novel test set devised for nonlinear balanced device characterization using load-pull techniques. The system is capable of measuring the voltage and current waveforms at the calibration reference planes while independently tuning the device ...
Ferrero, Andrea Pierenrico   +3 more
core   +1 more source

Non-Observation Bias in an Address-Register-Based CATI/CAPI Mixed Mode Survey

open access: yesMethoden, Daten, Analysen, 2016
Landline surveys suffer from an increasing risk of excluding a relevant share of the population. To analyze and correct telephone coverage issues, face-to-face surveys are often used, which contain questions about landline ownership and registration ...
Oliver Lipps
doaj   +1 more source

Crack’s bifurcation in an anisotropic material

open access: yesMATEC Web of Conferences, 2012
The orthotropic of a solid is characterized by the material directions 1→,2→,3→$mathop 1limits^ o ,mathop 2limits^ o ,mathop 3limits^ o $ and corresponds to six main directions of the crack’ distribution 21, 31, 32, 12, 13 and 23 (the first number ...
El Kaaba A., Lahna F., Belrhazi N.
doaj   +1 more source

Analysis of Mixed-Mode I/II/III Fracture Toughness Based on a Three-Point Bending Sandstone Specimen with an Inclined Crack

open access: yesApplied Sciences, 2021
The crack-propagation form may appear as an arbitrary mixed-mode fracture in an engineering structure due to an irregular internal crack. It is of great significance to research the mixed-mode fracture of materials with cracks.
Xin Pan   +4 more
doaj   +1 more source

Robust sliding mode control for discrete stochastic systems with mixed time delays, randomly occurring uncertainties, and randomly occurring nonlinearities [PDF]

open access: yes, 2012
This is the post-print version of the paper. The official published version can be accessed from the link below - Copyright @ 2012 IEEEThis paper investigates the robust sliding mode control (SMC) problem for a class of uncertain nonlinear stochastic ...
Zidong Wang   +7 more
core   +1 more source

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