Results 21 to 30 of about 478,211 (201)

Take a MOOC and then drop: A systematic review of MOOC engagement pattern and dropout factor

open access: yesHeliyon, 2023
Massive Open Online Course (MOOC) plays an important role in education equity and lifelong learning without entrance barriers, time limitations, and geographical constraints. However, MOOC is criticized by researchers for its high dropout rate.
Hao Huang, Lihjen Jew, Dandan Qi
doaj   +1 more source

Electric and Magnetic Gating of Rashba-Active Weak Links [PDF]

open access: yes, 2018
In a one-dimensional weak-link wire the spin-orbit interaction (SOI) alone cannot generate a nonzero spin current. We show that a Zeeman field acting in the wire in conjunction with the Rashba SOI there does yield such a current, whose magnitude and ...
Aharony, A.   +3 more
core   +2 more sources

Heartbeat of the Southern Oscillation explains ENSO climatic resonances

open access: yesJournal of Geophysical Research: Oceans, Volume 122, Issue 8, Page 6746-6772, August 2017., 2017
Abstract The El Niño‐Southern Oscillation (ENSO) nonlinear oscillator phenomenon has a far reaching influence on the climate and human activities. The up to 10 year quasi‐period cycle of the El Niño and subsequent La Niña is known to be dominated in the tropics by nonlinear physical interaction of wind with the equatorial waveguide in the Pacific. Long‐
John T. Bruun   +2 more
wiley   +1 more source

Modelling of Ship Originated Exhaust Gas Emissions in the Strait of Istanbul (Bosphorus)

open access: yesInternational Journal of Environment and Geoinformatics, 2019
In addition to being one of the largest metropolises in the world, Istanbul is also one of the busiest routes of international maritime transport through the Strait of Istanbul (SoI).
İrşad Bayırhan   +3 more
doaj   +1 more source

Fabrication of Poly(pentaerythritol tetrakis (3-mercaptopropionate)/dipentaerythritol penta-/hexa-acrylate)HIPEs Macroporous Scaffold with Alpha Hydroxyapatite via Photopolymerization for Fibroblast Regeneration

open access: yesCrystals, 2020
Synthetic biomaterials that can be structured into porous scaffolds for support cell growth have played a role in developing the field of tissue engineering. This research focused on combination of biodegradable emulsion template along with the assisting
Muhammad Imran Azman   +4 more
doaj   +1 more source

Impact of climate change on Southeast Asian natural habitats, with focus on protected areas

open access: yesGlobal Ecology and Conservation, 2022
Natural habitats have been destroyed by anthropogenic factors for several decades, exacerbated by climate change. This study investigated the impact of climate change on natural habitats by using 55 Phasianidae species.
Maliwan Namkhan   +2 more
doaj   +1 more source

Collection probability with discrete random signal‐to‐interference power ratios in multiple interferences for electronic intelligence receivers

open access: yesThe Journal of Engineering, Volume 2013, Issue 9, Page 23-30, September 2013., 2013
In certain applications, signal transmit power is adjusted in discrete levels. Moreover, interference powers themselves can be discretely random. For electronic intelligence applications, the authors refer to the signal to be collected as signal of interest (SoI). Thus, for a passive receiver, the resulting instantaneous SoI‐to‐interference power ratio
Ric A. Romero   +2 more
wiley   +1 more source

A Monolithic High‐G SOI‐MEMS Accelerometer for Measuring Projectile Launch and Flight Accelerations

open access: yesShock and Vibration, Volume 13, Issue 2, Page 127-135, 2006., 2006
Analog Devices (ADI) has designed and fabricated a monolithic high‐g acceleration sensor (ADXSTC3‐HG) fabricated with the ADI silicon‐on‐insulator micro‐electro‐mechanical system (SOI‐MEMS) process. The SOI‐MEMS sensor structure has a thickness of 10 um, allowing for the design of inertial sensors with excellent cross‐axis rejection.
Bradford S. Davis   +2 more
wiley   +1 more source

Soy, Soy Phytoestrogens and Cardiovascular Disease [PDF]

open access: yesThe Journal of Nutrition, 2002
Dietary soy protein has been shown to have several beneficial effects on cardiovascular health. The best-documented effect is on plasma lipid and lipoprotein concentrations, with reductions of approximately 10% in LDL cholesterol concentrations (somewhat greater for individuals with high pretreatment LDL cholesterol concentrations) and small increases ...
openaire   +2 more sources

Au risque de soi: L’événement et la relation

open access: yesJournal of French and Francophone Philosophy, 2012
Ce texte s’efforce de définir la contribution possible de la phénoménologie française contemporaine au développement et à la radicalisation du projet d’une herméneutique du soi.
Marc-Antoine Vallée
doaj   +1 more source

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