Results 101 to 110 of about 815,050 (359)
Diversity and composition of cactus species along an altitudinal gradient in the Sierras del Norte Mountains (Córdoba, Argentina) [PDF]
, 2014 Cacti are important elements of the flora in many ecosystems of the Americas. However, the factors that determine their richness and composition are not well known, particularly at the regional scale.
Demaio, Pablo Horacio +2 more
core +1 more source
The circular altitude of a graph [PDF]
arXiv, 2016 In this paper we investigate a parameter of graphs, called the circular altitude, introduced by Peter Cameron. We show that the circular altitude provides a lower bound on the circular chromatic number, and hence on the chromatic number, of a graph and investigate this parameter for the iterated Mycielskian of certain graphs.
arxiv
An altitude and distance correction to the source fluence distribution of TGFs [PDF]
, 2016 The source fluence distribution of terrestrial gamma ray flashes (TGFs) has been extensively discussed in recent years, but few have considered how the TGF fluence distribution at the source, as estimated from satellite measurements, depends on the distance from satellite foot point and assumed production altitude.
arxiv +1 more source
Deep Q‐Network‐Based Hierarchical Path Planning of a Biped Wall‐Climbing Robot for Window Cleaning
Advanced Intelligent Systems, EarlyView.This article presents a biped wall‐cleaning climbing robotic system for the maintenance of multi‐isolated areas on exoskeleton‐structured windows (ESWs). A full coverage cleaning approach is proposed by integrating a deep Q‐network‐based method with the robotic system to address the complete coverage cleaning path planning problem.
Weijian Zhang +3 more
wiley +1 more source
Space Station Freedom altitude strategy [PDF]
The Space Station Freedom (SSF) altitude strategy provides guidelines and assumptions to determine an altitude profile for Freedom. The process for determining an altitude profile incorporates several factors such as where the Space Shuttle will ...
Mcdonald, Brian M., Teplitz, Scott B.
core +1 more source
Emission altitude in radio pulsars [PDF]
arXiv, 2002 This paper presents a method of estimation of emission altitudes using observational data - precise measurements of pulse profile widths at low intensity level. The analysis of emission altitudes obtained using this method for a large number of pulsars gives constraints that should be useful for theory of coherent pulsar emission.
arxiv
Multicluster Distributed Optimization Strategy for Turbine Wake Environment
Advanced Intelligent Systems, EarlyView.This article studies the wake analysis of wind farms in different aspects, including basic methods, clustering optimization, and wake optimization. Through multiclustering, the wake optimization in a specific wind farm environment is explored. And focusing on the time cost and other issues that need to be solved in practical applications, targeted ...
Zhenping Yu +5 more
wiley +1 more source
The lung at high altitude [PDF]
Multidisciplinary Respiratory Medicine, 2011 The lung is the interface between the environment and the metabolic mechanisms of the body, and plays a pivotal role in exposure to high altitude. In fact, high altitude is a challenge for [...]
openaire +5 more sources
Aerial Anchors Positioning for Reliable RSS-Based Outdoor Localization in Urban Environments
, 2017 In this letter, the localization of terrestrial nodes when unmanned aerial vehicles (UAVs) are used as base stations is investigated. Particularly, a novel localization scenario based on received signal strength (RSS) from terrestrial nodes is introduced.
Azari, Mohammad Mahdi +3 more
core +1 more source
In vitro study: HIF-1α-dependent glycolysis enhances NETosis in hypoxic conditions
Frontiers in ImmunologyBackgroundHypoxia plays a pivotal role in modulating immune responses, especially in neutrophils, which are essential components of the innate immune system.
Yi Ye +21 more
doaj +1 more source