Results 21 to 30 of about 43,878 (194)

Weakly bound states in heterogeneous waveguides [PDF]

open access: yes, 2015
We study the spectrum of the Helmholtz equation in a two-dimensional infinite waveguide, containing a weak heterogeneity localized at an internal point, and obeying Dirichlet boundary conditions at its border.
Amore, Paolo   +2 more
core   +3 more sources

Comments on "Gravity field of the southern Colima graben" by W. L. Bandy, C. A. Mortera-Gutierrez and J. Urrutia

open access: yesGeofísica Internacional, 1996
En un artículo reciente, Bandy et al. (1993) reportan los resultados de modelado de datos de gravedad marina para el margen continental del Bloque Jalisco. En la Figura 5 de su artículo, uno espere que la línea A-A' sea normal a la dimensión más larga de
Juan García Abdeslem
doaj   +1 more source

Important records of waterbirds along the Central Pacific Coast of Mexico

open access: yesHuitzil, 2019
Documenting the presence of bird species outside of its current distribution, allows us to understand their patterns of spatial and temporal distribution. In addition it allows us to assess their ecological value compared to other sites.
Salvador Hernandez   +5 more
doaj   +1 more source

Bound states for the quantum dipole moment in two dimensions [PDF]

open access: yes, 2012
We calculate accurate eigenvalues and eigenfunctions of the Schr\"odinger equation for a two-dimensional quantum dipole. This model proved useful for the study of elastic effects of a single edge dislocation.
Amore, Paolo, Fernández, Francisco M
core   +2 more sources

Of hummingbirds and helicopters: Hovering costs, competitive ability, and foraging strategies [PDF]

open access: yes, 2004
Wing morphology and flight kinematics profoundly influence foraging costs and the overall behavioral ecology of hummingbirds. By analogy with helicopters, previous energetic studies have applied the momentum theory of aircraft propellers to estimate ...
Altshuler, Douglas L.   +2 more
core   +1 more source

Reply to comments by J. García Abdeslem on: "Gravity field of the southern Colima graben"

open access: yesGeofísica Internacional, 1996
Agradecemos a Juan García-Abdeslem (1995) por su interés en nuestro estudio de gravedad en el área del graben del sur de Colima (Bandy et al., 1993). La estructura y la tectónica de esta región están actualmente sujetas a mucho debate.
William L. Bandy   +2 more
doaj   +1 more source

First report of begomoviruses infecting Cucumis sativus L. in North America and identification of a proposed new begomovirus species [PDF]

open access: yesPeerJ, 2020
Background Members of the Begomovirus genus are phytopathogens that infect dicotyledonous plants, producing economic losses in tropical and subtropical regions.
Sarahi Sanchez-Chavez   +8 more
doaj   +2 more sources

Petrology and geochemistry of stage-I andesites and dacites from the caldera wall of Vol can Colima, Mexico

open access: yesGeofísica Internacional, 1993
Se reportan las concentraciones y modos para 10 lavas andesíticas y dacíticas de la Etapa I del Volcán de Colima. Nueve de estas muestras fueron colectadas en la pared de la caldera que se formó por uno o varios eventos tipo colapso Sta.
James F. Luhr
doaj   +1 more source

Leptin in the Commissural Nucleus of the Tractus Solitarius (cNTS) and Anoxic Stimulus in the Carotid Body Chemoreceptors Increases cNTS Leptin Signaling Receptor and Brain Glucose Retention in Rats

open access: yesMedicina, 2022
Background and Objectives: The commissural nucleus of the tractus solitarius (cNTS) not only responds to glucose levels directly, but also receives afferent signals from the liver, and from the carotid chemoreceptors (CChR).
Mónica Lemus   +6 more
doaj   +1 more source

On the Dynamics of Dengue Virus type 2 with Residence Times and Vertical Transmission

open access: yes, 2016
A two-patch mathematical model of Dengue virus type 2 (DENV-2) that accounts for vectors' vertical transmission and between patches human dispersal is introduced. Dispersal is modeled via a Lagrangian approach.
Bichara, Derdei   +4 more
core   +2 more sources

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