Results 21 to 30 of about 2,190,086 (304)

Understanding the three and four-leg inverter Space Vector [PDF]

open access: yes, 2016
This paper shows a new point of view of the classical voltage space vectors and its implications on three and four-leg converters. It is easy to find in the literature, authors using bi-dimensional and threedimensional representations of the converter ...
Heredero Peris, Daniel   +3 more
core   +1 more source

Take-off mechanics in hummingbirds (Trochilidae) [PDF]

open access: yes, 2004
Initiating flight is challenging, and considerable effort has focused on understanding the energetics and aerodynamics of take-off for both machines and animals.
Altshuler, Douglas L.   +2 more
core   +2 more sources

The sitting-height index of build, (body mass)/(sitting height)³, as an improvement on the body mass index for children, adolescents and young adults [PDF]

open access: yes, 2018
The body mass index (BMI) is unsatisfactory in being affected by both relative leg length and height, and, for use with children and adolescents, therefore needs to be interpreted in relation to age. The sitting-height index of build (body mass)/(sitting
Burton, Richard
core   +2 more sources

Questions about Using the Induced Membrane Technique to Manage Cases of Congenital Tibial Pseudarthrosis

open access: yesCells, 2023
The induced membrane technique is an innovative approach for repairing critical bone defects and has been applied recently in patients with congenital pseudarthrosis of the tibia (CPT).
Céline Klein   +4 more
doaj   +1 more source

Do the Green Bonds Markets React to Political Uncertainty and Financial Stress Alike?

open access: yesScientific Annals of Economics and Business
This study investigates the dynamic relationship between political uncertainty (EPU), financial stress, and green bond returns, utilizing the Range-DCC GARCH model and wavelet coherence analysis.
Yousra Trichilli   +2 more
doaj   +1 more source

Evaluating Dynamic Connectedness Between Economic Sanctions Sentiment, Uncertainty Factors, and Financial Assets: A Quantile VAR Approach

open access: yesScientific Annals of Economics and Business
This paper investigates the dynamic connection between investor sentiment and a range of asset classes during the Russia-Ukraine conflict. Using daily data from January 1, 2022, to April 20, 2023, we employ the Quantile Vector Autoregressive (QVAR ...
Hayet Soltani   +2 more
doaj   +1 more source

Significance of the determination of doppler sonography haemodynamic indices for the assessment of distal perfusion in patients with critical ischemia of lower limbs [PDF]

open access: yesVojnosanitetski Pregled, 2006
Background/Aim: The perfusion of tissue, especially the muscles of the lower limbs (LL), implies the blood flow that carries enough nutrition, energy materials and oxygen.
Čizmić Milica   +3 more
doaj   +1 more source

Charge density plateaux and insulating phases in the $t-J$ model with ladder geometry

open access: yes, 2003
We discuss the occurrence and the stability of charge density plateaux in ladder-like $t-J$ systems (at zero magnetization M=0) for the cases of 2- and 3-leg ladders.
Fledderjohann, A.   +2 more
core   +2 more sources

Peroneal Flap: Clinical Application and Cadaveric Study

open access: yesArchives of Plastic Surgery, 2017
Background The goal of this study was to investigate the anatomy of the peroneal artery and its perforators, and to report the clinical results of reconstruction with peroneal artery perforator flaps.
Yooseok Ha   +3 more
doaj   +1 more source

Mechanical work performed by individual limbs of transfemoral amputees during step-to-step transitions: Effect of walking velocity [PDF]

open access: yes, 2014
The greater metabolic demand during the gait of people with a transfemoral amputation limits their autonomy and walking velocity. Major modifications of the kinematic and kinetic patterns of transfemoral amputee gait quantified using gait analysis may ...
BONNET, Xavier   +4 more
core   +5 more sources

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