Results 21 to 30 of about 336,502 (287)

Urban topo climatic factors effects on heating Islands based on high-resolution Digital Surface Models

open access: yesAfrican Journal on Land Policy and Geospatial Sciences, 2021
Urban surface morphology is an important key factor in determining the temporal variation of thermal anisotropy. This study uses drones based high-resolution Digital Surface Models (DSM) to explore the impact of morphological urban variability expressed
Jean DOUMIT, Samar SAKR
doaj   +1 more source

An environmental analysis of public UAP sightings and sky view potential

open access: yesScientific Reports, 2023
Sightings of unidentified flying objects (UFOs) or unidentified anomalous phenomena (UAP) have been reported throughout history. Given the potential security and safety risks they pose, as well as scientific curiosity, there is increasing interest in ...
R. M. Medina   +2 more
doaj   +1 more source

Analyzing the correlation of sky-view factor and shadow regions in hyperspectral data

open access: yes2016 24th Signal Processing and Communication Application Conference (SIU), 2016
In this paper, we investigate the radiance and reflectance values of the shadow regions in hyperspectral data, and their relation to the sky-view factors. For this purpose, first, we find the shadow regions using LiDAR data. Then, we compute the sky-view factors from LiDAR data.
Oduncu, Emrah, Yuksel, Seniha Esen
openaire   +2 more sources

Making the Third Dimension (3D) Explicit in Hedonic Price Modelling: A Case Study of Xi’an, China

open access: yesLand, 2020
Recent rapid population growth and increasing urbanisation have led to fast vertical developments in urban areas. Therefore, in the context of the dynamic property market, factors related to the third dimension (3D) need to be considered. Current hedonic
Yue Ying   +5 more
doaj   +1 more source

Asteroid detection at millimetric wavelengths with the Planck survey [PDF]

open access: yes, 2002
The Planck mission, originally devised for cosmological studies, offers the opportunity to observe Solar System objects at millimetric and submillimetric wavelengths. We concentrate in this paper on the asteroids of the Main Belt.
Burigana, C.   +3 more
core   +2 more sources

A simple operative method for determination of sky view factors in complex urban canyons from fisheye photographs

open access: yesMeteorologische Zeitschrift, 1992
The sky view factor (SVF) is of importance in the study of urban climates. There is a close connection between the SVF and the fluxes of longwave radiation.
Björn Holmer
doaj   +1 more source

Evaluation of on-site calibration procedures for SKYNET Prede POM sun–sky photometers [PDF]

open access: yesAtmospheric Measurement Techniques
To retrieve columnar intensive aerosol properties from sun–sky photometers, both irradiance and radiance calibration factors are needed. For the irradiance the solar calibration constant, V0, which denotes the instrument counts for a direct normal solar ...
M. Campanelli   +22 more
doaj   +1 more source

Building the Evryscope: Hardware Design and Performance [PDF]

open access: yes, 2019
The Evryscope is a telescope array designed to open a new parameter space in optical astronomy, detecting short timescale events across extremely large sky areas simultaneously. The system consists of a 780 MPix 22-camera array with an 8150 sq.
Corbett, Henry T.   +6 more
core   +3 more sources

LEADERSHIP IN MERGER AND ACQUISITION SITUATION: A CASE REVIEW OF LUFTHANSA SERVICE GmbH (LSG) and Sky Chefs Inc.

open access: yesJournal of Management and Business Review, 2017
This article proposes a relation and linkage between leadership aspects and their involvement in managing the soft factor issues post-Merger and Acquisition (M&A) to achieve the best outcome. The relation and linkage is drawn from the analysis of M&A and
Lufina Mahadewi
doaj   +1 more source

Influence of street setbacks on solar reflection and air cooling by reflective streets in urban canyons [PDF]

open access: yes, 2017
The ability of a climate model to accurately simulate the urban cooling effect of raising street albedo may be hampered by unrealistic representations of street geometry in the urban canyon.
Ban-Weiss, G   +3 more
core   +1 more source

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