Spectral asymptotics of the Dirichlet Laplacian in a conical layer

The spectrum of the Dirichlet Laplacian on conical layers is analysed through two aspects: the infiniteness of the discrete eigenvalues and their expansions in the small aperture limit. On the one hand, we prove that, for any aperture, the eigenvalues accumulate below the thresh-old of the essential spectrum: For a small distance from the essential spectrum, the number of eigenvalues farther from the threshold than this distance behaves like the logarithm of the distance. On the other hand, in the small aperture regime, we provide a two-term asymptotics of the first eigenvalues thanks to a priori localization estimates for the associated eigenfunctions. We prove that these eigenfunctions are localized in the conical cap at a scale of order the cubic root of the aperture angle and that they get into the other part of the layer at a scale involving the logarithm of the aperture angle

VALORACI 3N DE LAS CARRERAS DE FCE UNPSJB EN LA CORDILLERA PATAG 3NICA ARGENTINA. DIFERENCIALES SEM\uc1NTICOS

Enmarcado en el PI "Actores y Factores del Microentorno de la Delegaci\uf3n Esquel de la Facultad de Ciencias Econ\uf3micas de la Universidad Nacional de la Patagonia San Juan Bosco" surge este trabajo en el que se aplica una herramienta propia de la investigaci\uf3n de mercado, el Diferencial Sem\ue1ntico (DS). La finalidad del DS es medir la significaci\uf3n que tiene cierto objeto o situaci\uf3n para las personas, buscando captar el significado afectivo. En el presente trabajo se consulta a los estudiantes respecto de las Carreras de Grado que ofrece nuestra instituci\uf3n buscando precisar las cualidades relativas a la misma disciplina en relaci\uf3n con aspectos acad\ue9micos y laborales. Preguntas que intentamos responder son: \ubfCu\ue1l es la valoraci\uf3n del alumno de grado de Ciencias Econ\uf3micas de la profesi\uf3n para la que se est\ue1 formando y de la carrera que est\ue1 cursando? \ubfHay diferencias en estas valoraciones seg\ufan la altura de la carrera en la que se encuentra? \ubfCu\ue1l es su percepci\uf3n de las caracter\uedsticas de la disciplina elegida y sus incumbencias profesionales?. Los calificativos que los estudiantes aportan espont\ue1neamente respecto a las carreras que cursan son \ufatil, pr\ue1ctica, importante e interesante. Que la carrera elegida se dicte en la Facultad fue uno de los factores motivacionales que determinaron su permanencia en Esquel, para realizar sus estudios universitarios. La opini\uf3n hacia la Facultad como instituci\uf3n, tanto para los estudiantes que est\ue1n ingresando a las distintas carreras como para quienes est\ue1n finalizando sus cursados, es de aceptaci\uf3n. Palabras clave: marketing, educaci\uf3n universitaria, representaciones sociales, informaci\uf3n. ABSTRACT Placed in the IP "Actors and Factors of The Microentorno of the Esquel Delegation of the Faculty of Economic Sciences of the Patagonia San Juan Bosco National University", this work arises in which a specific tool of market research is applied. Semantic Differential (DS). The purpose of DS is to measure the meaning that has a certain object or situation for people, seeking to grasp the affective meaning. In the present work, the students are consulted regarding the degree courses offered by our institution, seeking to specify the qualities related to the same discipline in relation to academic and labor aspects. Questions that we try to answer are: What is the valuation of the student of degree of Economic Sciences of the profession for which it is being formed and of the race that is taking? Are there differences in these ratings according to the height of the race in which you are? What is your perception of the characteristics of the chosen discipline and its professional responsibilities?. The qualifications that the students contribute spontaneously regarding the races that they are useful, practical, important and interesting. That the chosen race was dictated in the Faculty was one of the motivational factors that determined its permanence in Esquel, to carry out its university studies. The opinion of the Faculty as an institution, both for the students who are entering the different careers and for those who are finishing their courses, is of acceptance. Keywords: marketing, university education, social representations, information. <br

Interaction of chromaffin granules with plasma membranes mediated by Ca2+ and Mg2+-ATP using self-generating gradients of percoll(R)

Grafenstein H von, Neumann E. Interaction of chromaffin granules with plasma membranes mediated by Ca2+ and Mg2+-ATP using self-generating gradients of percoll(R). FEBS Letters. 1981;123(2):238-240

Benthic Foraminiferal Assemblages from Mexican Continental Shelves

The recent benthic foraminifera 1 fauna of the continental margins of Mexico (Gulf of Campeche and Gulf of Tehuantepec) was studied. Surficial sediment samples (lOcc) were collected using a Shipeck dredge and were stained with Sudan Black B in order to differentiate the living fauna from the death assemblage. In the 41 samples from the Gulf of Campeche, 279 species were found in the total assemblage in water depths ranging from 9 to 586 m. In the 22 samples in the Gulf of Tehuantepec, 132 species were identified from the total assemblage in water depths of 20 to 180 m. A total of 175 species were found alive in the Gulf of Campeche compared to the 70 found in the Gulf of Tehuantepec. Shannon-Wiener values indicated that the Gulf of Campeche species diversity was higher than that of the Gulf of Tehuantepec. However, living and total faunas in both areas follow the same diversity trends in relation to water depth. Even though the samples from Tehuantepec show lower diversity, the fauna shows a more uniform distribution in terms of evenness (E). The observed diversity trends could be explained by the Time Stability Theory. Based on water depth, the following three assemblages were found in both the Gulf of Campeche and the Gulf of Tehuantepec: Inner neritic (less than 50 m), central and outer neritic (50-150 m), and upper bathyal. Even though assemblages of the two areas are different at the species level, there are similarities at the generic level. The cluster analysis provided a better correlation in both areas between total faunas and water depths. For the living fauna in Campeche, sediment distribution was correlated with faunal distribution. In Tehuantepec, the distribution of the dominant species Hanzawaia nitidula is strongly reflected in the structure of the dendrogram

Summa summularum

Colofón.Sign.: []4, B-Z8, 2A-2G8, 2H4.Port. con grab. xil