Results 21 to 30 of about 5,492,472 (182)

Units – Student’s Friend or Fiend?

open access: yesCHIMIA, 2022
The idea beyond this column is to point out the difficulties that students or pupils often have when solving problems that require handling units. These include the use of the proper unit for the corresponding physical quantity during the calculation ...
Jan Cvengros
doaj   +1 more source

Natural selection. III. Selection versus transmission and the levels of selection [PDF]

open access: yes, 2011
George Williams defined an evolutionary unit as hereditary information for which the selection bias between competing units dominates the informational decay caused by imperfect transmission.
Frank, Steven A.
core   +2 more sources

Spasticity Measurement Based on Tonic Stretch Reflex Threshold in Children with Cerebral Palsy Using the PediAnklebot

open access: yesFrontiers in Human Neuroscience, 2017
Nowadays, objective measures are becoming prominent in spasticity assessment, to overcome limitations of clinical scales. Among others, Tonic Stretch Reflex Threshold (TSRT) showed promising results.
Marco Germanotta   +7 more
doaj   +1 more source

Dynamic analysis of positive pneumatic units [PDF]

open access: yes, 2019
Розглянуто аналіз динаміки позиційного пневмоагрегата, реалізованого на дискретній апаратурі. Для цього розроблено математичну модель роботи системи позиційних пневмоагрегатів з програмованими електронними блоками управління, що дозволяє враховувати ...
Фатєєв, Олександр Миколайович   +2 more
core   +1 more source

A novel bidding method for combined heat and power units in district heating systems

open access: yes, 2018
We propose a bidding method for the participation of combined heat and power (CHP) units in the day-ahead electricity market. More specifically, we consider a district heating system where heat can be produced by CHP units or heat-only units, e.g., gas ...
Andersen, Anders N.   +3 more
core   +1 more source

Past and future climate change in the context of memorable seasonal extremes

open access: yesClimate Risk Management, 2016
It is thought that direct personal experience of extreme weather events could result in greater public engagement and policy response to climate change.
T. Matthews   +4 more
doaj   +1 more source

Evaluating the effects of climate change on precipitation and temperature for Iran using RCP scenarios

open access: yesJournal of Water and Climate Change, 2021
Climate change has caused many changes in hydrologic processes and climatic conditions globally, while extreme events are likely to occur more frequently at a global scale with continued warming.
Shahab Doulabian   +3 more
doaj   +1 more source

Economic analysis of computed tomography units [PDF]

open access: yesAmerican Journal of Roentgenology, 1976
All operating CT installations in the United States were surveyed in January 1976; data were obtained from 98 of 140 installations. Although the respondents represented 80 head units and 18 head and body units, the overwhelming experience was with head CT studies.
R G, Evens, R G, Jost
openaire   +2 more sources

Strategies, contributions and inhibitors of information systems to organizational competitiveness: An empirical analysis within the Caribbean [PDF]

open access: yes, 2008
The study examines the impact of Information Systems (IS) through a consideration of improved competitiveness within a multi-business Caribbean firm.
Braganza, A, Hackney, R, Louis, S
core   +1 more source

In Vivo Assessment of Shear Wave Propagation in Pennate Muscles Using an Automatic Ultrasound Probe Alignment System

open access: yesIEEE Open Journal of Engineering in Medicine and Biology, 2023
Goal: Skeletal muscle mechanics can be assessed in vivo using shear wave elastography. However, the impact of pennation angle on shear wave velocity (SWV) remains unclear.
Manuela Zimmer   +6 more
doaj   +1 more source

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