Results 61 to 70 of about 2,518,014 (290)

Improved Active and Reactive Control of a Small Wind Turbine System Connected to the Grid

open access: yesResources, 2019
This paper deals with the interconnection of a small wind turbine with the low voltage distribution grid and the implementation of an improved control scheme, which also serves educational purposes. Initially the subsystems—wind turbine, rectifying
Theofilos Papadopoulos   +2 more
doaj   +1 more source

Protein pyrophosphorylation by inositol pyrophosphates — detection, function, and regulation

open access: yesFEBS Letters, EarlyView.
Protein pyrophosphorylation is an unusual signaling mechanism that was discovered two decades ago. It can be driven by inositol pyrophosphate messengers and influences various cellular processes. Herein, we summarize the research progress and challenges of this field, covering pathways found to be regulated by this posttranslational modification as ...
Sarah Lampe   +3 more
wiley   +1 more source

Education as a Human Right: A Comparison of Two Early College Approaches to University Access for Racial/Ethnic Minority Students in Costa Rica and the United States

open access: yesCurrent Issues in Education, 2015
In line with the United Nations perspective of Education being a human right for all world citizens, access to higher education by students representing traditionally marginalized racial and ethnic minority groups continues to be a challenge in many ...
Leah McAlister-Shields   +1 more
doaj  

Reviews [PDF]

open access: yes, 1995
Technology‐based Learning Environments: Psychological and Educational Foundations edited by S. Vosniadou, E. De Corte and H. Mandl, volume 137 in NATO ASI Series F (Computer and Systems Sciences), Berlin, Springer‐Verlag, ISBN: 0–387–58253–3 ...
Barker, Philip   +6 more
core   +1 more source

Substrate specificity of Burkholderia pseudomallei multidrug transporters is influenced by the hydrophilic patch in the substrate‐binding pocket

open access: yesFEBS Letters, EarlyView.
Multidrug transporters BpeB and BpeF from the Gram‐negative pathogen Burkholderia pseudomallei have a hydrophilic patch in their substrate‐binding pocket. Drug susceptibility tests and growth curve analyses using an Escherichia coli recombinant expression system revealed that the hydrophilic patches of BpeB and BpeF are involved in the substrate ...
Ui Okada, Satoshi Murakami
wiley   +1 more source

Collaborative Educational Systems [PDF]

open access: yes
This paper starts describing the key concepts of collaborative systems and the impact of this to educational systems. There are presented the main properties and quality characteristics for the collaborative educational systems.
Cristian CIUREA, Rodica BÃTÃGAN
core  

Evaluation of usage patterns for web-based educational systems using web mining [PDF]

open access: yes, 2001
Virtual courses often separate teacher and student physically from one another, resulting in less direct feedback. The evaluation of virtual courses and other computer-supported educational systems is therefore of major importance in order to monitor ...
Donnellan, David, Pahl, Claus
core  

Function‐driven design of a surrogate interleukin‐2 receptor ligand

open access: yesFEBS Letters, EarlyView.
Interleukin (IL)‐2 signaling can be achieved and precisely fine‐tuned through the affinity, distance, and orientation of the heterodimeric receptors with their ligands. We designed a biased IL‐2 surrogate ligand that selectively promotes effector T and natural killer cell activation and differentiation. Interleukin (IL) receptors play a pivotal role in
Ziwei Tang   +9 more
wiley   +1 more source

Immigrants, schooling and background. Cross-country evidence from PISA 2006 [PDF]

open access: yes
Using data from PISA 2006, we examine the performance of immigrant students in different international educational environments. Our results show smaller immigrant gaps – differences in scores with respect to natives - where educational systems are more ...
Davide Ferrari   +3 more
core   +3 more sources

Effects of walking long distances by ECD learners in Shamva district, Mashonaland Central Province, Zimbabwe

open access: yesInternational Journal of Studies in Inclusive Education
The education landscape studies have been carried out on the effects of distance from home to school on the performance of ECD learners. Various factors that affect learners’ academic performance, such as poor attendance, school dropouts, and poor ...
Lucky Mutonhodza
doaj   +1 more source

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