Infección por el virus de la leucemia felina (FeLV) y linfomas mediastínicos : dos casos clínicos

Se describen los hallazgos clínicos, radiológicos y analíticos en dos casos de gatos menores de dos años, que se presentaron con un cuadro clínico de caquexia, vómitos y disnea. En ambos casos las radiografías evidenciaron la presencia de masas intratorácicas; la analítica basada en test ELISA para FeLV y FIV y las necropsias efectuadas, parecen demostrar la relación existente entre gato joven, FeLV y el desarrollo de masas tumorales mediastínicas.The clinical, radiologycal and analytic discovery, are described in two cases of cats under two years of age which were presented with dyspnea, vomiting and caquexia. In both cases the radiographs showed the presence of intrathoracic masses; ELISA test for FeLV and FIV and the necropsy demostrated the relation of young cat and FeLV with the development of mediastinic tumoral masses

Harmonically Trapped Quantum Gases

We solve the problem of a Bose or Fermi gas in $d$-dimensions trapped by $\delta \leq d$ mutually perpendicular harmonic oscillator potentials. From the grand potential we derive their thermodynamic functions (internal energy, specific heat, etc.) as well as a generalized density of states. The Bose gas exhibits Bose-Einstein condensation at a nonzero critical temperature $T_{c}$ if and only if $d+\delta >2$, and a jump in the specific heat at $T_{c}$ if and only if $d+\delta >4$. Specific heats for both gas types precisely coincide as functions of temperature when $d+\delta =2$. The trapped system behaves like an ideal free quantum gas in $d+\delta$ dimensions. For $\delta =0$ we recover all known thermodynamic properties of ideal quantum gases in $d$ dimensions, while in 3D for $\delta =$ 1, 2 and 3 one simulates behavior reminiscent of quantum {\it wells, wires}and{\it dots}, respectively.Comment: 14 pages including 3 figures and 3 table

Nonparametric analysis of the time structure of seismicity in a geographic region

As an alternative to traditional parametric approaches, we suggest nonparametric methods for analyzing temporal data on earthquake occurrences. In particular, the kernel method for estimating the hazard function and the intensity function are presented. One novelty of our approaches is that we take into account the possible dependence of the data to estimate the distribution of time intervals between earthquakes, which has not been considered in most statistics studies on seismicity. Kernel estimation of hazard function has been used to study the occurrence process of cluster centers (main shocks). Kernel intensity estimation, on the other hand, has helped to describe the occurrence process of cluster members (aftershocks). Similar studies in two geographic areas of Spain (Granada and Galicia) have been carried out to illustrate the estimation methods suggested

Application of the Wavelet Transform to the Digital Image Processing of Electron Micrographs and of Backreflection Electron Diffraction Patterns

In this work we explore the use of the so-called wavelet transform in the digital image processing of micrographs. The wavelet transform of an image f(x,y) is defined as: Wf(s,u,v) = f(x,y) s Ψ(s(x-u),s(y-v)) dxdy where Ψ is an analyzing function called wavelet and which is in our examples always taken to be the Mexican hat given by Ψ(x)=(2-(x2+y2))exp(-(x2+y2)/2) Some synthetic images are shown in which it can be clearly seen how the wavelet transform can be useful to reveal edges and to emphasize the boundaries of the clusters. The technique is applied in the case of the CoMoS catalysts, in which the wavelet transform can be used to emphasize the hexagonal domains while filtering the noise quite effectively. The technique is next applied to electron backreflection patterns where substantial noise reduction and emphasis of the lines are achieved. Several examples of the application of this processing tool to high resolution images of metallic particles and to quasicrystals are presented

Atmospheric pollution in the ten most populated US cities. Evidence of persistence

The degree of persistence in daily PM25 and O3 in the ten most populated US cities, namely New York, Los Angeles, Chicago, Houston, Phoenix, Philadelphia, San Antonio, San Diego, Dallas and San Jose is examined in this work. We employ a methodology based on fractional integration, using the order of integration as a measure of the degree of persistence. Using data for the time period from January 1, 2019 to December 31, 2020, our results indicate that fractional integration and long memory features are both present in all the examined cases, with the integration order of the series being constrained in the (0, 1) interval. Based on this, the estimation of the coefficients for the time trend produces results which are substantially different from those obtained under the I(0) assumption

Slow and fast micro-field components in warm and dense hydrogen plasmas

The aim of this work is the investigation of the statistical properties of local electric fields in an ion-electron two component plasmas for coupled conditions. The stochastic fields at a charged or at a neutral point in plasmas involve both slow and fast fluctuation characteristics. The statistical study of these local fields based on a direct time average is done for the first time. For warm and dense plasma conditions, typically $N_{e}\approx 10^{18}cm^{-3}$, $$, well controlled molecular dynamics (MD) simulations of neutral hydrogen, protons and electrons have been carried out. Relying on these \textit{ab initio} MD calculations this work focuses on an analysis of the concepts of statistically independent slow and fast local field components, based on the consideration of a time averaged electric field. Large differences are found between the results of these MD simulations and corresponding standard results based on static screened fields. The effects discussed are of importance for physical phenomena connected with stochastic electric field fluctuations, e.g., for spectral line broadening in dense plasmas.Comment: 4 pages, 4 figures, submitted to Phys. Rev. Let

Capillaria plica como agente etiológico de hematuria en un perro

Se describen los hallazgos clínicos y hematológicos, diagnóstico y tratamiento de un caso de hematuria y disuria provocado por Capíllaria plica en un perro macho de un año y medio.Clinical picture, haematologic features, diagnostic techniques and treatment protocols are discussed regarding a male dog one year and a half old with hematuria caused by Capillaria plica