Results 31 to 40 of about 269,566 (295)

Experimental Evaluation of 100Cr6 Steel Microindented Surfaces Under Lubricated Nonconformal Point Contacts

open access: yesAdvanced Engineering Materials, EarlyView.
The tribological behavior of 100Cr6 steel spheres textured via Vickers microindentation is evaluated under lubricated sliding by varying both dimple size and density. Fine and dense textures significantly reduce friction across all lubrication regimes, while large dimples increase it.
Farideh Davoodi   +3 more
wiley   +1 more source

Enhancing Critical Thinking and Mathematical Achievement Through Problem-Based-Learning: A Classroom Action Research at SMKN 6 Surabaya

open access: yesJurnal Pendidikan Matematika (JPM)
This study aimed to enhance students’ critical thinking skills and mathematics learning outcomes on the topic of relations and functions through the implementation of the Problem-Based Learning (PBL) model.
Sollia Mahani   +3 more
doaj   +1 more source

On the Lightweight Potential of Laser Additive Manufactured NiTi Triply Periodic Minimal Sheet Lattices

open access: yesAdvanced Engineering Materials, EarlyView.
This study explores the lightweight potential of laser additive‐manufactured NiTi triply periodic minimal surface sheet lattices. It systematically investigates the effects of relative density and unit cell size on surface quality, deformation recovery, compression behavior, and energy absorption.
Haoming Mo   +3 more
wiley   +1 more source

Environmental Factors Driving Diversification of Ponderosa Pine in the Western United States

open access: yesLand
We used cluster analysis on 200-year-old tree-ring chronologies to examine the patterns that emerge from self-organization, driven by environmental heterogeneity, that might drive diversification in ponderosa pine (Pinus ponderosa).
James H. Speer, Megan Heyman
doaj   +1 more source

Evolução do desempenho cognitivo dos jovens brasileiros no Pisa Evolution of the cognitive achievement of Brazilian youth on Pisa

open access: yesCadernos de Pesquisa, 2012
O artigo analisa a evolução das habilidades cognitivas dos jovens brasileiros medidas pelo Programa Internacional de Avaliação de Alunos - Pisa. Reporta-se a resultados bem positivos.
Sergei Suarez Dillon Soares   +1 more
doaj   +1 more source

Mathematical models and hepatology; oil and vinegar? [PDF]

open access: yes, 2016
Mathematical models are increasingly being used in medicine to study physiological, pathophysiological and therapeutic pathways [1–3]. In hepatology, mathematical abstractions have been beneficial to predict the viral load of hepatitis C following ...
Noiret, Lorette, Rose, Christopher
core   +1 more source

Air‐Pressure–Actuated Vibroacoustic Metamaterial With Tunable Bandgap: Design, Modeling, and Characterization

open access: yesAdvanced Engineering Materials, EarlyView.
This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal   +2 more
wiley   +1 more source

The Plant Science Blogging Project: A curriculum to develop student science communication skills

open access: yesPlants, People, Planet, 2022
Societal Impact Statement The practice of writing science blogs benefits both the scientist and society alike by providing professional development opportunities and delivering information in a format that is accessible to large and diverse audiences. By
Veronica Iriart   +3 more
doaj   +1 more source

The Transition to College Process in PR-CETP Scholars [PDF]

open access: yes, 2001
This article describes a study about the experiences of a group of students during the transition from high school to college. The students are future teachers who evidenced a high level of academic achievement in high school and received merit ...
Bravo, M.   +4 more
core   +1 more source

Intensity enhancement of O VI ultraviolet emission lines in solar spectra due to opacity

open access: yes, 2014
Opacity is a property of many plasmas, and it is normally expected that if an emission line in a plasma becomes optically thick, its intensity ratio to that of another transition that remains optically thin should decrease.
Bowler, L. A.   +7 more
core   +1 more source

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