Results 1 to 10 of about 1,019,090 (317)

Robust continuous third-order finite time sliding mode controllers for exoskeleton robot [PDF]

open access: yesArchive of Mechanical Engineering, 2021
In this work, continuous third-order sliding mode controllers are presented to control a five degrees-of-freedom (5-DOF) exoskeleton robot. This latter is used in physiotherapy rehabilitation of upper extremities.
Ratiba Fellag   +3 more
doaj   +1 more source

Synthesis of novel phthalimido oxime pseudoesters and evaluation of their cytotoxicity [PDF]

open access: yesJournal of the Serbian Chemical Society, 2020
A series of novel optically pure oxime pseudoesters derivatives were synthesized by the reaction of substitute keto oximes with various N-substituted α-amino acids chlorides in the presence of triethylamine and dichloromethane at 0°C, and their ...
Mehrez Asma   +4 more
doaj   +1 more source

Cu-Catalyzed Arylation of Bromo-Difluoro-Acetamides by Aryl Boronic Acids, Aryl Trialkoxysilanes and Dimethyl-Aryl-Sulfonium Salts: New Entries to Aromatic Amides

open access: yesMolecules, 2021
We describe a mechanism-guided discovery of a synthetic methodology that enables the preparation of aromatic amides from 2-bromo-2,2-difluoroacetamides utilizing a copper-catalyzed direct arylation.
Satenik Mkrtchyan   +4 more
doaj   +1 more source

The Effect of Group type and Mediation type in Group Dynamic Assessment on the Improvement of Iranian Homogeneous and Heterogeneous EFL Learners' Listening Comprehension [PDF]

open access: yesJournal of Language Horizons, 2023
Based on Vygotsky's concept of Zone of Proximal Development, dynamic assessment (DA) has at its core the integration of assessment and instruction through mediation. DA is practiced either individually or collectively. In group-dynamic assessment (G-DA),
Nader Safaei Asl   +2 more
doaj   +1 more source

Liutex-Represented Vortex Spectrum in Turbulence

open access: yesEntropy, 2022
The Liutex vector is new quantity introduced to represent the rigid-body rotation part of fluid motion and thus to define and identify vortices in various flows. In this work, the intermittency and power-law similarity of the Liutex vector in homogeneous,
Bowen Yan, Yiqian Wang, Chaoqun Liu
doaj   +1 more source

Homogenous rivers, homogenous faunas [PDF]

open access: yesProceedings of the National Academy of Sciences, 2007
Habitat change and invasions of alien species are usually listed as the two biggest causes of biodiversity loss. When the two coincide, the results can be devastating, because altered habitat often favors alien species adapted to the changed conditions.
Peter B, Moyle, Jeffrey F, Mount
openaire   +2 more sources

Asymptotic Tail Probability of the Discounted Aggregate Claims under Homogeneous, Non-Homogeneous and Mixed Poisson Risk Model

open access: yesRisks, 2021
In this paper, we derive a closed-form expression of the tail probability of the aggregate discounted claims under homogeneous, non-homogeneous and mixed Poisson risk models with constant force of interest by using a general dependence structure between ...
Franck Adékambi, Kokou Essiomle
doaj   +1 more source

Development of heterogeneous catalyst from assorted periwinkle snail shells for sustainable biodiesel synthesis [PDF]

open access: yesE3S Web of Conferences, 2023
Owing to the environmental friendliness of biodiesel compared to fossil fuels, its application in internal combustion engines has gained wide recognition.
Ogunkunle Oyetola   +1 more
doaj   +1 more source

Are cryptocurrencies homogeneous? [PDF]

open access: yesEuropean Financial Management, 2019
AbstractThis article investigates if cryptocurrencies returns' are similarly affected by a selection of demand‐ and supply‐side determinants. Homogeneity among cryptocurrencies is tested via a least absolute shrinkage and selection operator (LASSO) model where determinants of Bitcoin returns are applied to a sample of 12 cryptocurrencies.
Bengtsson, Elias, Gustafsson, Frida
openaire   +1 more source

Plastic flow of isotropic rigid body at uniform deformation

open access: yesВесці Нацыянальнай акадэміі навук Беларусі: Серыя фізіка-тэхнічных навук, 2021
The mathematical analysis of plastic flow processes under uniform plane, axisymmetric and volumetric deformation is carried out. The analysis is based on the external shape change of the body, which determines the movement of material points. It is shown
O. M. Dyakonov
doaj   +1 more source

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