Results 141 to 150 of about 1,095,950 (312)

Dynamics of Micro-Air-Vehicle with Flapping Wings

open access: yesActa Polytechnica, 2004
Small (approximately 6 inch long, or hand-held) reconnaissance micro air vehicles (MAVs) will fly inside buildings, and require hover for observation, and agility at low speeds to move in confined spaces.
K. Sibilski
doaj  

Pesticide exposure affects flight dynamics and reduces flight endurance in bumblebees

open access: yesEcology and Evolution, 2019
The emergence of agricultural land use change creates a number of challenges that insect pollinators, such as eusocial bees, must overcome. Resultant fragmentation and loss of suitable foraging habitats, combined with pesticide exposure, may increase ...
Daniel Kenna   +5 more
doaj   +1 more source

Field observations about the behaviour of codling-moth in Trentino (North-Eastern Italy) [PDF]

open access: yes, 2008
Codling-moth and applescab are the most important pathogens in both conventional and organic apple productions. In order to control any phytopathological problem, it is important to improve the knowledge of the behaviour of each specific pest.
Forno, F.   +3 more
core  

Micro/nanorobots for detecting and eliminating biological and chemical warfare agents

open access: yesBMEMat, EarlyView.
Fuel‐powered and field‐driven micro/nanorobots provide a cutting‐edge platform to safeguard national security and defense. This review reports the latest research progress in micro/nanorobots in sensing and detoxifying biological and chemical warfare agents.
Song Li   +4 more
wiley   +1 more source

Why we age

open access: yesBiological Reviews, EarlyView.
ABSTRACT Three categories of explanations exist for why we age: mechanistic theories, which omit reference to evolutionary forces; weakening force of selection theories, which posit that barriers exist that prevent evolutionary forces from optimising fitness in ageing; and optimisation theories, which posit that evolutionary forces actually select for ...
Michael S. Ringel
wiley   +1 more source

Development of computer software to analyze entire LANDSAT scenes and to summarize classification results of variable-size polygons [PDF]

open access: yes
The Forest Pest Management Division (FPMD) of the Pennsylvania Bureau of Forestry has the responsibility for conducting annual surveys of the State's forest lands to accurately detect, map, and appraise forest insect infestations. A standardized, timely,
Baumer, G. M.   +3 more
core   +1 more source

The impact of urbanisation on social behaviour: a comprehensive review

open access: yesBiological Reviews, EarlyView.
ABSTRACT Urbanisation is a key driver of global environmental change and presents animals with novel stressors and challenges. It can fundamentally influence social behaviour and has the potential to reshape within‐ and between‐species social interactions. Given the role of social behaviour in reproductive fitness and survival, understanding how social
Avery L. Maune   +2 more
wiley   +1 more source

Flight activity of the ambrosia beetles Trypodendron laaeve and Trypodendron lineatum in relation to temperature in southern Sweden [PDF]

open access: yes, 2011
The aim of this study was to investigate the flight activity and abundance of the ambrosia beetle, Trypodendron lineatum Olivier 1795 (Col., Scolytinae) in southern Sweden after storm-fellings in Jan 2005 (Gudrun) and Jan 2007 (Per), that blew down 75 ...
Lindelöw, Åke   +2 more
core  

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