Results 11 to 20 of about 1,215,036 (268)

Textbook Broke: Textbook Affordability as a Social Justice Issue

open access: yesJournal of Interactive Media in Education, 2020
In light of rising textbook prices, open education resources (OER) have been shown to decrease non-tuition costs, while simultaneously increasing academic access, student performance, and time-to-graduation rates.
J. Jacob Jenkins   +5 more
doaj   +1 more source

Purification and Substrate Specificity of Key Enzymes Involved in Plant Wax Synthesis [PDF]

open access: yesBIO Web of Conferences
Plant waxes, as a class of hydrophobic lipid complexes covering the outer surface of plant epidermal cells, play a central role in reducing water transpiration, resisting biotic and abiotic stresses, and maintaining epidermal integrity.
Huang Pinhe   +5 more
doaj   +1 more source

The channel capacity of the postal channel

open access: yesInformation and Control, 1970
A mathematical model is proposed for a postal service which occasionally loses letters. A positive coding theorem and a converse is proved for this channel. The coding theorem is proved by utilizing a deterministic code (Reed-Solomon code) and bounded discrepancy decoding.
Jack K. Wolf, Aaron D. Wyner, Jacob Ziv
openaire   +2 more sources

Validation of Anti-Tumor Activity of Plant Wax Extract and Study on Pharmaceutical Preparation Process [PDF]

open access: yesBIO Web of Conferences
Plant waxes, as a class of hydrophobic lipid complexes covering the outer surface of plant epidermal cells, play a central role in reducing water transpiration, resisting biotic and abiotic stresses, and maintaining epidermal integrity.
Deng Kehan   +4 more
doaj   +1 more source

Using side flow jets as a scour countermeasure downstream of a sluice gate

open access: yesBeni-Suef University Journal of Basic and Applied Sciences, 2021
Background Local scour is one of the main problems affecting the stability and operation of control hydraulic structures. Many techniques were used to control the resulting scour.
Mohamed S. Abdelmoaty, Mahmoud Zayed
doaj   +1 more source

Channel metrization

open access: yesEuropean Journal of Combinatorics, 2019
We present an algorithm that, given a channel, determines if there is a distance for it such that the maximum likelihood decoder coincides with the minimum distance decoder. We also show that any metric, up to a decoding equivalence, can be isometrically embedded into the hypercube with the Hamming metric, and thus, in terms of decoding, the Hamming ...
Rafael Gregorio Lucas D'Oliveira   +1 more
openaire   +2 more sources

The desensitization pathway of GABAA receptors, one subunit at a time

open access: yesNature Communications, 2020
GABAA receptors mediate most inhibitory synaptic transmission in the brain. Here authors used concatemeric α1β2γ2 GABAA receptors to introduce gain-of-desensitization mutations one subunit at a time, revealing non-concerted rearrangements with a key ...
Marc Gielen   +2 more
doaj   +1 more source

Clicking for friendship: social network sites and the medium of personhood

open access: yesMedieKultur: Journal of Media and Communication Research, 2010
Social networking sites such as MySpace and Facebook depend on familiar social resources, including language, reading/writing and established semantic constructs such as personhood, privacy and friends. However, the use of computers, the Web 2.0 platform,
Daniel B. Lee   +2 more
doaj   +1 more source

Definition of two agonist types at the mammalian cold-activated channel TRPM8

open access: yeseLife, 2016
Various TRP channels act as polymodal sensors of thermal and chemical stimuli, but the mechanisms whereby chemical ligands impact on TRP channel gating are poorly understood.
Annelies Janssens   +8 more
doaj   +1 more source

Illumination of a progressive allosteric mechanism mediating the glycine receptor activation

open access: yesNature Communications, 2023
Glycine receptors are channel receptors mediating signal transduction between neurons that transit between resting and open states upon neurotransmitter binding.
Sophie Shi   +8 more
doaj   +1 more source

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