Results 11 to 20 of about 58,230 (252)
Multimodal Locomotion: Next Generation Aerial–Terrestrial Mobile Robotics
Advanced Intelligent Systems, EarlyView., 2023 Aerial–terrestrial robots can achieve efficient energy consumption and robust environmental interaction by adding morphological features, adapting forms for locomotion transitions, and integrating multiple platforms. This next generation of mobile robots advances real‐world robotic deployment for operations with complex tasks and tackle environments ...
Jane Pauline Ramirez, Salua Hamaza
wiley +1 more source
Schneefernerhaus as a mountain research station for clouds and turbulence [PDF]
Atmospheric Measurement Techniques, 2015 Cloud measurements are usually carried out with airborne campaigns, which are expensive and are limited by temporal duration and weather conditions. Ground-based measurements at high-altitude research stations therefore play a complementary role in cloud
S. Risius +6 more
doaj +1 more source
A Robust Photogrammetric Processing Method of Low-Altitude UAV Images
Remote Sensing, 2015 Low-altitude Unmanned Aerial Vehicles (UAV) images which include distortion, illumination variance, and large rotation angles are facing multiple challenges of image orientation and image processing. In this paper, a robust and convenient photogrammetric
Mingyao Ai +5 more
doaj +1 more source
The anthropogenic contribution to atmospheric black carbon concentrations in southern Africa: a WRF-Chem modeling study [PDF]
Atmospheric Chemistry and Physics, 2015 South Africa has one of the largest industrialized economies in Africa. Emissions of air pollutants are particularly high in the Johannesburg-Pretoria metropolitan area, the Mpumalanga Highveld and the Vaal Triangle, resulting in local air pollution ...
F. Kuik +7 more
doaj +1 more source
Atmosphere, 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
A Consideration of Breast Imagery in Art as Depicted through Western Painting
Archives 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
Environmental 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
Shortest closed billiard orbits on convex tables [PDF]
, 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
Altitude, Orthocenter of a Triangle and Triangulation [PDF]
Formalized Mathematics, 2016 Summary We introduce the altitudes of a triangle (the cevians perpendicular to the opposite sides). Using the generalized Ceva’s Theorem, we prove the existence and uniqueness of the orthocenter of a triangle [7]. Finally, we formalize in Mizar [1] some formulas [2] to calculate distance using triangulation.
openaire +3 more sources
Altitudes of a Tetrahedron and Traceless Quadratic Forms [PDF]
Amer. Math. Monthly 110 (2003), 679-693, 2013 It is well known that the three altitudes of a triangle are concurrent at the so-called orthocenter of the triangle. So one might expect that the altitudes of a tetrahedron also meet at a point. However, it was already pointed out in 1827 by the Swiss geometer Jakob Steiner (1796--1863) that the altitudes of a general tetrahedron are mutually skew, for
arxiv +1 more source