Results 61 to 70 of about 8,641,712 (236)

Contemporary Haqiqī Calculation: Analysis of Rinto Anugraha's Lunar Eclipse Calculation Methods

open access: yesJournal of Islamic Law, 2022
Classical Islamic astronomy literature that discusses eclipse calculations still uses the ḥaqiqī bi al-taqrīb method with low accuracy. In its development, Islamic astronomical literature studies the calculation of lunar eclipses with high accuracy ...
'Alamul Yaqin
doaj   +1 more source

SMAP Detects Soil Moisture Under Temperate Forest Canopies

open access: yesGeophysical Research Letters, 2020
Soil moisture dynamics in the presence of dense vegetation canopies are determinants of ecosystem function and biogeochemical cycles, but the capability of existing spaceborne sensors to support reliable and useful estimates is not known.
A. Colliander   +12 more
semanticscholar   +1 more source

Accidents and injuries related to paragliding on mount Babadağ, Turkey: A cross-sectional study

open access: yesTurkish Journal of Emergency Medicine, 2023
OBJECTIVES: In light of the growing popularity of paragliding, this cross-sectional study aimed to investigate the epidemiology of paragliding accidents, providing insights into the types and severity of injuries sustained as well as the body regions ...
Ömer Faruk Karakoyun, Yalcin Golcuk
doaj   +1 more source

Psychometric Properties of NASA-TLX and Index of Cognitive Activity as Measures of Cognitive Workload in Older Adults

open access: yesBrain Science, 2020
Cognitive workload is increasingly recognized as an important determinant of performance in cognitive tests and daily life activities. Cognitive workload is a measure of physical and mental effort allocation to a task, which can be determined through ...
H. Devos   +6 more
semanticscholar   +1 more source

Large scale optimization of transonic axial compressor rotor blades [PDF]

open access: yes, 2008
[First Paragraphs] In the present work the Multipoint Approximation Method (MAM) by Toropov et al. (1993) has been applied to the shape optimization of an existing transonic compressor rotor (NASA rotor 37) as a benchmark case.
Polynkin, A., Shahpar, S., Toropov, V.
core   +1 more source

Nonlinear Least-Squares Based Method for Identifying and Quantifying Single and Mixed Contaminants in Air with an Electronic Nose

open access: yesSensors, 2005
The Jet Propulsion Laboratory has recently developed and built an electronic nose(ENose) using a polymer-carbon composite sensing array. This ENose is designed to be usedfor air quality monitoring in an enclosed space, and is designed to detect, identify
Margaret A. Ryan   +3 more
doaj   +1 more source

Modelling the Effects of Meteorological Factors on Maximum Rainfall Intensities Using Exponentiated Standardized Half Logistic Distribution

open access: yesJournal of Applied Mathematics, 2022
Rainfall intensity prediction or forecast is vital in designing hydraulic structures and flood and erosion control structures. In this work, meteorological data were obtained from the National Aeronautics and Space Administration’s (NASA) website. Models
B. F. Sasanya   +3 more
doaj   +1 more source

Adaptive and Online Health Monitoring System for Autonomous Aircraft [PDF]

open access: yes, 2012
Good situation awareness is one of the key attributes required to maintain safe flight, especially for an Unmanned Aerial System (UAS). Good situation awareness can be achieved by incorporating an Adaptive Health Monitoring System (AHMS) to the aircraft.
Howe, Joe M.   +3 more
core   +1 more source

Indoor Radar Cross Section Measurements of Simple Targets

open access: yesJournal of Aerospace Technology and Management, 2012
This paper has described the radar absorbing materials characterization and radar cross section measurements, in the frequency range of 8 to 12 GHz, using a very simple setup.
Marcelo Alexandre Souza Miacci   +4 more
doaj   +1 more source

Evaluation of Four Reanalysis Datasets against Radiosonde over Southwest Asia

open access: yesAtmosphere, 2020
Upper-air observational networks in Southwest Asia (SWA) are geographically sparse and reanalysis datasets (RDs) are a typical alternative. However, RDs can perform with varying degrees of quality and accuracy due to differences in assimilation schemes ...
Ali S. Alghamdi
doaj   +1 more source

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