Results 21 to 30 of about 46,285 (150)

Impacts of Vegetation and Topography on Land Surface Temperature Variability over the Semi-Arid Mountain Cities of Saudi Arabia

open access: yesAtmosphere, 2020
Land surface temperature (LST) can fully reflect the water–heat exchange cycle of the earth surface that is important for the study of environmental change.
Ahmed Ali Bindajam   +4 more
doaj   +1 more source

Shortest closed billiard orbits on convex tables [PDF]

open access: yes, 2014
Given a planar compact convex billiard table $T$, we give an algorithm to find the shortest generalised closed billiard orbits on $T$. (Generalised billiard orbits are usual billiard orbits if $T$ has smooth boundary.) This algorithm is finite if $T$ is ...
Alkoumi, Naeem, Schlenk, Felix
core   +1 more source

A Consideration of Breast Imagery in Art as Depicted through Western Painting

open access: yesArchives of Plastic Surgery, 2015
The aim of this study is to consider breast imagery in art as depicted through western painting. Twenty western art paintings were collated. Most of the sample paintings were created from the mid-nineteenth century to the late twentieth century and some ...
Kun Hwang, Ju Yong Park, Se Won Hwang
doaj   +1 more source

A Fuzzy Logic Based Algorithm for Finding Astronomical Objects in Wide-Angle Frames [PDF]

open access: yes, 2005
Accurate automatic identification of astronomical objects in an imperfect world of non-linear wide-angle optics, imperfect optics, inaccurately pointed telescopes, and defect-ridden cameras is not always a trivial first step.
Bertin   +5 more
core   +2 more sources

Spatial distribution of invasive large fever berry trees (Croton megalobotrys) in Sengwa Wildlife Research Area: Gokwe, Zimbabwe

open access: yesEnvironmental Systems Research, 2023
Background The invasion of rangelands by invasive plant species is a major threat to biodiversity in most parts of Zimbabwe posing not only an ecological challenge but a growing management and eradication challenge as well.
Mark Matsa   +4 more
doaj   +1 more source

A Network of Portable, Low-Cost, X-Band Radars [PDF]

open access: yes, 2012
Radar is a unique tool to get an overview on the weather situation, given its high spatio- temporal resolution. Over 60 years, researchers have been investigating ways for obtaining the best use of radar.
Allegretti, Marco   +7 more
core   +2 more sources

Geometric features of second mesiobuccal canal in permanent maxillary first molars: a cone-beam computed tomography study

open access: yesJournal of Dental Sciences, 2017
Background/purpose: Inadequacy to locate the second mesiobuccal canal (MB2) canal leads to the highest probability of endodontic failure in permanent maxillary first molars (PMFMs) and still remains a constant challenge for many clinicians.
Chi-Chun Su   +9 more
doaj   +1 more source

On-Line Obstacle Detection, Avoidance, and Mapping of an Outdoor Quadrotor Using EKF-Based Fuzzy Tracking Incremental Control

open access: yesIEEE Access, 2019
The unknown two-dimensional obstacles, including different shapes, numbers, locations, and in the vicinity of the planning path for an outdoor quadrotor, are on-line detected by a 360-degree Li-Dar Sweep Scanse.
Chih-Lyang Hwang   +2 more
doaj   +1 more source

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