Results 21 to 30 of about 95,061 (143)

Aeromedical retrieval of trauma patients: Impact of flight path model on estimates of population coverage

The American Journal of Surgery, 2020
The aim of this study was to compare the impact of different flight path models on the calculated population coverage of aeromedical retrieval systems, using the state of Alabama as a case study.Geospatial analysis of U.S. Census Bureau population data using helicopter bases and trauma centers as foci of either circular or elliptical coverage areas ...
K. Lorraine Stone, W. Andrew Smedley, John Killian, Shannon W. Stephens, Russell L. Griffin, Daniel B. Cox, Jeffrey D. Kerby, Jan O. Jansen   +7 more
openaire   +3 more sources

Flight Mill Experiments and Computer Simulations Indicate Islands Recruit More Capable Flyers of Moths

Frontiers in Ecology and Evolution, 2021
Understanding the traits related to species colonization and invasion, is a key question for both pest management and evolution. One of the key components is flight, which has been measured for a number of insect species through radar and tethered flight
Yu-xuan Zheng, Ying Wang, Bo-ya Dai, Zheng Li, Qi-run Huo, Jian-xin Cui, Hao Liu, Xin-hai Li, Alice C. Hughes, Ai-bing Zhang   +9 more
doaj   +1 more source

Demographic Processes in the Western Part of the Armenian Highland (Late XV-XIV Centuries BC)

Banber Arevelagitut'yan Instituti
The cuneiform Hittite texts of the XV-XIV centuries BC contain important information dealing with at least two different population movements happened along the Upper Euphrates region.
Aram Kosyan
doaj   +6 more sources

Flight Muscle and Wing Mechanical Properties are Involved in Flightlessness of the Domestic Silkmoth, Bombyx mori

Insects, 2020
Flight loss has occurred in many winged insect taxa. The flightless silkmoth Bombyx mori, is domesticated from the wild silkmoth, Bombyx mandarina, which can fly.
Kunpeng Lu, Shubo Liang, Minjin Han, Chunman Wu, Jiangbo Song, Chunlin Li, Songyuan Wu, Songzhen He, Jianyu Ren, Hai Hu, Jianghong Shen, Xiaoling Tong, Fangyin Dai   +12 more
doaj   +1 more source

Post-Spaceflight (STS-135) Mouse Splenocytes Demonstrate Altered Activation Properties and Surface Molecule Expression. [PDF]

PLoS ONE, 2015
Alterations in immune function have been documented during or post-spaceflight and in ground based models of microgravity. Identification of immune parameters that are dysregulated during spaceflight is an important step in mitigating crew health risks ...
Shen-An Hwang, Brian Crucian, Clarence Sams, Jeffrey K Actor   +3 more
doaj   +1 more source

Responses to Selection on Flight Behavior in a Migratory Population of Milkweed Bug (Oncopeltus fasciatus) [PDF]

Evolution, 1989
The nature of genetic variation and covariation influencing life-history traits has been the subject of an increasing number of theoretical and empirical studies (Steams, 1983; Arnold, 1987). Knowledge of the socalled "genetic structure" among traits is essential to understanding both the potential and constraints for phenotypic evolution in response ...
James O, Palmer, Hugh, Dingle
openaire   +2 more sources

Urban flight: understanding individual and population‐level responses of Nearctic–Neotropical migratory birds to urbanization [PDF]

Journal of Animal Ecology, 2007
1. Despite the fact that studies of urban ecology have become commonplace in the literature, ecologists still lack empirical evidence of the underlying mechanisms responsible for relationships between urbanization and animal community structure. In an effort to understand the processes that govern an apparent avoidance of urban landscapes by many ...
Amanda D, Rodewald, Daniel P, Shustack
openaire   +2 more sources

Reduced flight-to-light behaviour of moth populations exposed to long-term urban light pollution [PDF]

Biology Letters, 2016
The globally increasing light pollution is a well-recognized threat to ecosystems, with negative effects on human, animal and plant wellbeing. The most well-known and widely documented consequence of light pollution is the generally fatal attraction of nocturnal insects to artificial light sources.
Florian Altermatt, Dieter Ebert
openaire   +3 more sources

Numerical characterization of astronaut CaOx renal stone incidence rates to quantify in-flight and post-flight relative risk

npj Microgravity, 2022
Changes in urine chemistry potentially alter the risk of renal stone formation in astronauts. Quantifying spaceflight renal stone incidence risk compared to pre-flight levels remains a significant challenge for assessing the appropriate vehicle, mission,
Debra A. Goodenow-Messman, Suleyman A. Gokoglu, Mohammad Kassemi, Jerry G. Myers   +3 more
doaj   +1 more source

Effect of density-dependent individual movement on emerging spatial population distribution: Brownian motion vs Levy flights [PDF]

Journal of Theoretical Biology, 2019
Individual animal movement has been a focus of intense research and considerable controversy over the last two decades, however the understanding of wider ecological implications of various movement behaviours is lacking. In this paper, we consider this issue in the context of pattern formation. Using an individual-based modelling approach and computer
John Ellis, Natalia Petrovskaya, Sergei Petrovskii   +2 more
openaire   +4 more sources