Results 71 to 80 of about 338,480 (190)

Consistent Choice of Prey Source Habitat Across Diverse Landscapes by a Selective Insectivorous Bat

open access: yesIntegrative Zoology, EarlyView.
After analyzing the diet of the greater horseshoe bats in three distinct colonies, we identified significant spatial and temporal differences, particularly noting a stronger reliance on riparian habitats in Mediterranean areas. The species exhibits great ecological adaptability with strong plasticity in prey source habitats, shifting preferences among ...
Miren Aldasoro   +7 more
wiley   +1 more source

Managing Procurement Auction Failure: Bid Requirements or Reserve Prices?

open access: yesThe RAND Journal of Economics, EarlyView.
ABSTRACT This paper examines bid requirements, where the government may cancel a procurement contract unless two or more bids are received. Using a first‐price auction model with endogenous entry, we compare the bid requirement and reserve price mechanisms in terms of auction failure and procurement costs.
Jun Ma, Vadim Marmer, Pai Xu
wiley   +1 more source

Metric Based Upscaling for Partial Differential Equations with a Continuum of Scales [PDF]

open access: yes, 2007
Numerical upscaling of problems with multiple scale structures have attracted increasing attention in recent years. In particular, problems with non-separable scales pose a great challenge to mathematical analysis and simulation.
Zhang, Lei
core   +1 more source

Optimized and Aligned Anisotropic Monte Carlo Sampling Patterns

open access: yesComputer Graphics Forum, EarlyView.
Abstract Path tracing uses Monte Carlo integration to solve the rendering equation by evaluating the integrand at random sampling points. The convergence rate of the error can be significantly improved by using correlated instead of random sampling, especially on smooth integrands.
Mirco Werner   +2 more
wiley   +1 more source

Taxonomic and functional patterns of arthropod succession after glacier retreat in the Dolomite Alps

open access: yesInsect Conservation and Diversity, EarlyView.
Arthropod succession after glacier retreat varied among species and forelands in the Dolomites Alps, with community composition shaped by glacier identity, time since deglaciation and local environmental conditions. Functional composition shifted from small, highly dispersive pioneer species to larger, less dispersive taxa, reflecting increasing ...
Ivan Petri   +13 more
wiley   +1 more source

Homogenization of diffusion processes on scale-free metric networks

open access: yesElectronic Journal of Differential Equations, 2016
This work studies the homogenization of diffusion processes on scale-free metric graphs, using weak variational formulations. The oscillations of the diffusion coefficient along the edges of a metric graph induce internal singularities in the global ...
Fernando A. Morales, Daniel E. Restrepo
doaj  

Thermomechanical properties optimization of L-PBF support structures via asymptotic homogenization and response surfaces [PDF]

open access: yesMATEC Web of Conferences
In the Laser Powder Bed Fusion (L-PBF) addive manufacuring process, support structures are essential to ensure mechanical anchoring and heat dissipation, preventing the part from warping due to accumulation of thermal residual stresses.
Hauer Dias Filho Ariangelo   +3 more
doaj   +1 more source

Mapping wild bee diversity and flower use for an effective conservation of the Doñana biodiversity hotspot

open access: yesInsect Conservation and Diversity, EarlyView.
We compiled the first checklist of wild bees in Doñana Protected Area, documenting 385 species, including three vulnerable and one endangered species listed in the Red List. Bee species exhibit diverse floral preferences, highlighting the need to incorporate plant–pollinator interactions and the role of plants in conservation and management strategies ...
Francisco P. Molina   +3 more
wiley   +1 more source

Mathematical homogenization of inelastic dissipative materials: a survey and recent progress [PDF]

open access: yes, 2017
In this paper, a review of papers on mathematical homogenization of dissipative composites under small strains and on the interplay between homogenization procedure and dissipation due to mechanical work is presented.
CHEMISKY, Yves   +8 more
core   +1 more source

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