Results 61 to 70 of about 289,578 (239)

Status, abundance and habitat preference of butterflies (Insecta: Lepidoptera) in Chittagong University Campus, Chittagong, Bangladesh

open access: yesJournal of Threatened Taxa, 2017
A study was conducted on the butterflies of the Chittagong University Campus (CUC), Bangladesh between March 2014 and May 2015.  A total of 142 species of butterflies belonging to 87 genera and six families (Hesperiidae, Papilionidae, Pieridae ...
Ibrahim Khalil Al Haidar   +3 more
doaj   +1 more source

Evaluating the Migration Mortality Hypothesis Using Monarch Tagging Data

open access: yesFrontiers in Ecology and Evolution, 2020
The decline in the eastern North American population of the monarch butterfly population since the late 1990s has been attributed to the loss of milkweed during the summer breeding season and the consequent reduction in the size of the summer population ...
Orley R. Taylor   +5 more
doaj   +1 more source

A RARE BUTTERFLY [PDF]

open access: yesThe Canadian Entomologist, 1903
n ...
openaire   +2 more sources

A Multiscale Butterfly Algorithm for Multidimensional Fourier Integral Operators

open access: yes, 2015
This paper presents an efficient multiscale butterfly algorithm for computing Fourier integral operators (FIOs) of the form $(\mathcal{L} f)(x) = \int_{R^d}a(x,\xi) e^{2\pi \i \Phi(x,\xi)}\hat{f}(\xi) d\xi$, where $\Phi(x,\xi)$ is a phase function, $a(x,\
Li, Yingzhou   +2 more
core   +1 more source

Flexible seal for valves Patent [PDF]

open access: yes, 1960
Flexible inflatable seal for butterfly ...
Bibbo, C., Browning, R. E.
core   +1 more source

Temperature dependence of butterfly effect in a classical many-body system

open access: yes, 2018
We study the chaotic dynamics in a classical many-body system of interacting spins on the kagome lattice. We characterise many-body chaos via the butterfly effect as captured by an appropriate out-of-time-ordered correlator.
Bhattacharjee, Subhro   +2 more
core   +1 more source

Mating between Anartia jatrophae jatrophae (Linnaeus, 1763) and Ortilia liriope (Cramer, 1775) (Lepidoptera: Nymphalidae) in the Brazilian Central Amazon

open access: yesRevista Chilena de Entomología
Reproductive isolation is crucial for the survival of species in nature; nevertheless, interspecific mating and hybrid formation can still occur. In this work, we report a mating event between Anartia jatrophae jatrophae (Linnaeus) and Ortilia liriope ...
Raymê dos Santos Carvalho   +3 more
doaj   +1 more source

On Phenomenological Failure Loci of Metals under Constant Stress States of Combined Tension and Shear: Issues of Coaxiality and Non-Uniqueness

open access: yesMetals, 2019
The present study investigates how the choice of characterization test and the composition of the stress state in terms of tension and shear can produce a non-unique failure locus in terms of stress triaxiality under plane stress conditions.
Cliff Butcher, Armin Abedini
doaj   +1 more source

Past, current, and potential future distributions of unique genetic diversity in a cold‐adapted mountain butterfly

open access: yesEcology and Evolution, 2020
Aim Climatic changes throughout the Pleistocene have strongly modified species distributions. We examine how these range shifts have affected the genetic diversity of a montane butterfly species and whether the genetic diversity in the extant populations
Melissa Minter   +7 more
doaj   +1 more source

A parallel butterfly algorithm

open access: yes, 2013
The butterfly algorithm is a fast algorithm which approximately evaluates a discrete analogue of the integral transform \int K(x,y) g(y) dy at large numbers of target points when the kernel, K(x,y), is approximately low-rank when restricted to subdomains
Demanet, Laurent   +3 more
core   +1 more source

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