Results 21 to 30 of about 585,774 (283)

Observation of Long-Lived Muonic Hydrogen in the 2S State [PDF]

, 2006
The kinetic energy distribution of ground state muonic hydrogen atoms mu-p(1S) is determined from time-of-flight spectra measured at 4, 16, and 64 hPa H2 room-temperature gas. A 0.9 keV-component is discovered and attributed to radiationless deexcitation
Claude Petitjean, D. Taqqu, David Taqqu, F. Joachim Hartmann, Franz Kottmann, G. Carboni, Herbert Daniel, L. Bracci, Markus Mühlbauer, Peter Hauser, Peter Wojciechowski-Grosshauser, Randolf Pohl, Valery E. Markushin, Wolfgang Schott   +13 more
core   +2 more sources

Flight activity promotes reproductive processes in the fall armyworm, Spodoptera frugiperda

Journal of Integrative Agriculture, 2021
The fall armyworm (FAW), Spodoptera frugiperda (Lepidoptera: Noctuidae), has invaded many countries in Africa and Asia since 2016, posing a major threat to world food security.
Shi-shuai GE, Wei HE, Li-mei HE, Ran YAN, Hao-wen ZHANG, Kong-ming WU   +5 more
doaj   +1 more source

Slingshot Dynamics for Self Replicating Probes and the Effect on Exploration Timescales [PDF]

, 2013
Interstellar probes can carry out slingshot manoeuvres around the stars they visit, gaining a boost in velocity by extracting energy from the star's motion around the Galactic Centre. These maneouvres carry little to no extra energy cost, and in previous
Forgan, Duncan, Nicholson, Arwen
core   +1 more source

The importance of including habitat-specific behaviour in models of butterfly movement [PDF]

, 2020
Dispersal is a key process affecting population persistence and major factors affecting dispersal rates are the amounts, connectedness and properties of habitats in landscapes.
Evans, Luke C.,, Lund University., Oliver, Tom H.,, Sibly, Richard M.,, Sims, Ian,, Thorbek, Pernille,, Walters, Richard J.,   +6 more
core   +1 more source

Flight from the land? Migration flows of the rural population of the Netherlands, 1850-1940

Espace populations sociétés, 2014
In this article, we aim to analyze the residential options of the rural population of the Netherlands in the late nineteenth and early twentieth century from the perspective of push factors operating at different levels: the household, the municipality and the region. We contrast the decision to stay with moving in several ways: within the municipality
Kok, Jan, Mandemakers, Kees, Mönkediek, Bastian   +2 more
openaire   +9 more sources

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

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 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

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

Neighbourhood mobility in context : household moves and changing neighbourhoods in the Netherlands [PDF]

, 2009
Although high levels of population mobility are often viewed as a problem at the neighbourhood level we know relatively little about what makes some neighbourhoods more mobile than others.
Clark, William A. V., Van Ham, Maarten
core   +1 more source