1,904 research outputs found
Multiple solutions to a magnetic nonlinear Choquard equation
We consider the stationary nonlinear magnetic Choquard equation
[(-\mathrm{i}\nabla+A(x))^{2}u+V(x)u=(\frac{1}{|x|^{\alpha}}\ast |u|^{p})
|u|^{p-2}u,\quad x\in\mathbb{R}^{N}%] where is a real valued vector
potential, is a real valued scalar potential ,
and . \ We assume that both and are
compatible with the action of some group of linear isometries of
. We establish the existence of multiple complex valued
solutions to this equation which satisfy the symmetry condition where
is a given group homomorphism into the unit
complex numbers.Comment: To appear on ZAM
The logarithmic Choquard equation: sharp asymptotics and nondegeneracy of the groundstate
We derive the asymptotic decay of the unique positive, radially symmetric solution to the logarithmic Choquard equation
and we establish its nondegeneracy. For the corresponding three-dimensional problem, the nondegeneracy property of the positive ground state to the Choquard equation was proved by E. Lenzmann (2009)
A Silurian-Devonian muddy platform-delta system (Río Seco de los Castaños Fm) in the San Rafael Block, Mendoza Province, Argentina
Fil: Manassero, Marcelo Jorge. CIG- Centro de Investigaciones Geológicas, Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata, 1-644, 1900 La Plata, ArgentinaFil: Cingolani, Carlos Alberto. Centro de Investigaciones Geológicas (CONICET-UNLP) y División Geología del Museo de La Plata, La PlataFil: Uriz, Norberto J.. División Geología del Museo de La Plata, La Plat
Band gap renormalization in photoexcited semiconductor quantum wire structures in the GW approximation
We investigate the dynamical self-energy corrections of the electron-hole
plasma due to electron-electron and electron-phonon interactions at the band
edges of a quasi-one dimensional (1D) photoexcited electron-hole plasma. The
leading-order dynamical screening approximation is used in the calculation
by treating electron-electron Coulomb interaction and electron-optical phonon
Fr\"{o}hlich interaction on an equal footing. We calculate the
exchange-correlation induced band gap renormalization (BGR) as a function of
the electron-hole plasma density and the quantum wire width. The calculated BGR
shows good agreement with existing experimental results, and the BGR normalized
by the effective quasi-1D excitonic Rydberg exhibits an approximate
one-parameter universality.Comment: 11 pages, 3 figure
El aporte de la Universidad de La Plata al conocimiento geológico de las Islas Malvinas (desde 1950 hasta 2012)
Fil: Cingolani, Carlos Alberto. División Geología. Facultad de Ciencias Naturales y Museo. Universidad Nacional de La Plata; ArgentinaFil: Varela, Ricardo. Centro de Investigaciones Geológicas (CIG). Facultad de Ciencias Naturales y Museo. Universidad Nacional de La PlataFil: Benialgo, Alfredo. Centro de Investigaciones Geológicas (CIG). Facultad de Ciencias Naturales y Museo. Universidad Nacional de La Plata; ArgentinaFil: Uriz, Norberto J.. División Geología. Facultad de Ciencias Naturales y Museo. Universidad Nacional de La Plata; Argentin
U-pb detrital zircon data from the paleozoic Sierra Grande Formation, north patagonian massif, Argentina
Fil: Uriz, Norberto J.. División Científica de Geología-Facultad Ciencias Naturales y Museo, Universidad Nacional de La PlataFil: Cingolani, Carlos Alberto. División Científica de Geología-Facultad Ciencias Naturales y Museo, Universidad Nacional de La PlataFil: Chemale, Farid. Laboratorio de Geología Isotópica, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500, Porto Alegre, BrazilFil: Armstrong, Richard. The Australian National University, Canberra 0200, ACT, Australi
Las rocas monzoníticas del sector oriental del Plutón de Cacheuta, Precordillera mendocina : Características geoquímicas y edad U/Pb (LA-ICP-MS)
Fil: Cingolani, Carlos Alberto. Centro de Investigaciones Geológicas (CIG). Facultad de Ciencias Naturales y Museo. Universidad Nacional de La Plata; ArgentinaFil: Uriz, Norberto J.. División Geología. Facultad de Ciencias Naturales y Museo. Universidad Nacional de La Plata; ArgentinaFil: Chemale, Farid. Instituto de Geociências. Universidade de Brasília; BrasilFil: Varela, Ricardo. Centro de Investigaciones Geológicas (CIG). Facultad de Ciencias Naturales y Museo. Universidad Nacional de La Plata; Argentin
Age estimation in children by measurement of open apices in teeth: an Indian formula.
The aim of this paper is twofold: first, to evaluate
an Indian sample by Cameriere\u2019s European formula; and
second, if this formula turns out to be unsuitable, to study a
specific formula for Indian children. Orthopantomographs
taken from 480 Indian children (227 girls and 253 boys) aged
between 3 and 15 years were analyzed. Following the pilot
study, subjects\u2019 age was modeled as a function of gender (g),
region of country (C), and morphological variables (predictors:
x5, the distance between the inner sides of the open
apex of the second premolar divided by the tooth length;
s \ubc x1 \ufe x2 \ufe x3 \ufe x4 \ufe x5 \ufe x6 \ufe x7, sum of normalized
open apices; N0, the number of teeth with root development
complete. Results showed that all these variables except
gender and second premolar contributed significantly to the
fit so that all were included in the regression model, yielding
the following linear regression formula:
Age \ubc 9:402 0:879 C \ufe 0:663 N0 0:711 s 0:106s N0
where C is a dummy variable equal to 0 for the center or
north of India and 1 for the south. The above equation, with
the variables considered, explained 89.7% (R2=0.897) of
total deviance. The median of the residuals (observed age
minus predicted age) was \u20130.063 years, with an interquartile
range of 1.10 years
Facies sedimentarias de la formación río seco de los castaños (silúrico-devónico) del bloque de San Rafael, Mendoza
Fil: Manassero, Marcelo Jorge. CIG- Centro de Investigaciones Geológicas, Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata, 1-644, 1900 La Plata, ArgentinaFil: Cingolani, Carlos Alberto. División Científica de Geología-Facultad Ciencias Naturales y Museo, Universidad Nacional de La Plata, Paseo del Bosque s/n, 1900 La Plata, ArgentinaFil: Abre, Paulina. CIG- Centro de Investigaciones Geológicas, Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata, 1-644, 1900 La Plata, ArgentinaFil: Uriz, Norberto J.. División Científica de Geología-Facultad Ciencias Naturales y Museo, Universidad Nacional de La Plata, Paseo del Bosque s/n, 1900 La Plata, Argentin
Structural basis for the homotypic fusion of chlamydial inclusions by the SNARE-like protein IncA.
Many intracellular bacteria, including Chlamydia, establish a parasitic membrane-bound organelle inside the host cell that is essential for the bacteria\u27s survival. Chlamydia trachomatis forms inclusions that are decorated with poorly characterized membrane proteins known as Incs. The prototypical Inc, called IncA, enhances Chlamydia pathogenicity by promoting the homotypic fusion of inclusions and shares structural and functional similarity to eukaryotic SNAREs. Here, we present the atomic structure of the cytoplasmic domain of IncA, which reveals a non-canonical four-helix bundle. Structure-based mutagenesis, molecular dynamics simulation, and functional cellular assays identify an intramolecular clamp that is essential for IncA-mediated homotypic membrane fusion during infection
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