No description available.

No description available.

La investigación Modelos de Proyectos de Innovación Pedagógica aplicado por los catedráticos en el proceso de enseñanza del Instituto Normal Superior Simón Bolívar (INSSSB) presenta las siguientes características: El problema se basa en una contradicción en el proceso de enseñanza y evaluación de los Proyectos de Innovación Pedagógica, que afecta la formación del estudiante, porque este tiene dificultades para poder seguir una línea de investigación educativa y la elaboración de PIP coherente. En este sentido surge el siguiente cuestionamiento: ¿Qué características tienen los modelos metodológicos para la elaboración de proyectos de innovación pedagógica aplicados por los catedráticos en los procesos de enseñanza y evaluación en el Instituto Normal Superior Simón Bolívar en el año 2006? A esta interrogante surge la siguiente hipótesis: los modelos metodológicos de elaboración del PIP tienden a combinar el paradigma positivista y el paradigma emergente en el proceso educativo, generando contradicciones en la enseñanza y evaluación de estos / The investigation Innovation Projects Models (PIP) apply by the professors on the teaching processor the Instituto Normal Superior Simon Bolivar (INSSB), presents the following characteristics: The problem at the INSSB determines because exists a contradiction on the process of formation and development teaching evaluation of the Pedagogic Innovation Projects, besides affects the student formation because this has difficulties to be able to follow an educative investigation line and a coherent elaboration of PIP In this sense rise the following questioning: Which characteristic has the methodological models for the elaboration of Pedagogic Innovation Projects applied by the professors on the teaching process and evaluation at the Instituto Normal Superior Simon Bolivar on 2006? To this interrogative rise the following supposed: the methodological models of the PIP elaboration try to combine positive paradigm and the emergent paradigm on the teaching process, generating contradictions on the teaching evaluation of this

Friction is a phenomenon which is present in most mechanical devices and frequently encountered in everyday life. In particular, understanding of this phenomenon is important in the modelling of contact between an elastic object and an obstacle. Noncoercive incremental contact problems with Coulomb friction constitute an important class of such friction problems due to their frequent occurrence in mechanical engineering. They occur for example when modelling an object which is not fixed to a support. The topic of this thesis is to study this class of friction problems. This thesis considers both discrete and continuous systems. For the continuous systems we consider both problems with a nonlocal friction law where the contact force is mollified and problems with a normal compliance friction law where the body may penetrate the obstacle. For all friction problems we derive a sufficient condition for the existence of a solution. This condition is a compatibility condition on the applied force field, and if it is violated there exists a nontrivial solution to a corresponding dynamical problem.

No description available.

The orbit of Phobos exhibits an along-track acceleration, which suggests energy dissipation in the Mars-Phobos system. We hypothesize that the inferred dissipation occurs within Mars. We explore the response of a layered, incompressible Maxwell viscoelastic Mars to tidal forcing by Phobos using normal mode relaxation theory. Our results elucidate the general behavior of a tidally forced viscoelastic body, and have implications for the viscoelastic structure of Mars. We find the real and imaginary part of the degree-two tidal Love number for Mars to be 0.168 and -9.32x10^−4 respectively. Models which satisfy these and other constraints have either: a fluid core with radius 2040 km and density 5410 kg/m^3; or an elastic inner core with radius 1200 km and density 6700 kg/m^3, along with a fluid outer core with thickness 850 km and density 4850 kg/m^3. These findings support previous hypotheses that Mars has at least a fluid outer core.

The orbit of Phobos exhibits an along-track acceleration, which suggests energy dissipation in the Mars-Phobos system. We hypothesize that the inferred dissipation occurs within Mars. We explore the response of a layered, incompressible Maxwell viscoelastic Mars to tidal forcing by Phobos using normal mode relaxation theory. Our results elucidate the general behavior of a tidally forced viscoelastic body, and have implications for the viscoelastic structure of Mars. We find the real and imaginary part of the degree-two tidal Love number for Mars to be 0.168 and -9.32x10^−4 respectively. Models which satisfy these and other constraints have either: a fluid core with radius 2040 km and density 5410 kg/m^3; or an elastic inner core with radius 1200 km and density 6700 kg/m^3, along with a fluid outer core with thickness 850 km and density 4850 kg/m^3. These findings support previous hypotheses that Mars has at least a fluid outer core.

<p>Queueing models have been used extensively in the design of call centres. In particular, a queueing model will be used to describe a help desk which is a form of a call centre. The design of the queueing model involves modelling the arrival an service processes of the system.</p><p>Conventionally, the arrival process is assumed to be Poisson and service times are assumed to be exponentially distributed. But it has been proposed that practically these are seldom the case. Past research reveals that the log-normal distribution can be used to model the service times in call centres. Also, services may involve stages/tasks before completion. This motivates the use of a phase-type distribution to model the underlying stages of service.</p><p>This research work focuses on developing statistical models for the overall service times and the service times by job types in a particular help desk. The assumption of exponential service times was investigated and a log-normal distribution was fitted to service times of this help desk. Each stage of the service in this help desk was modelled as a phase in the phase-type distribution.</p><p>Results from the analysis carried out in this work confirmed the irrelevance of the assumption of exponential service times to this help desk and it was apparent that log-normal distributions provided a reasonable fit to the service times. A phase-type distribution with three phases fitted the overall service times and the service times of administrative and miscellaneous jobs very well. For the service times of e-mail and network jobs, a phase-type distribution with two phases served as a good model.</p><p>Finally, log-normal models of service times in this help desk were approximated using an order three phase-type distribution.</p>

Several outcome tools have been developed to measure physical functioning in pediatric orthopedic patients. One such tool, the Activities Scale for Kids (ASK), allows assessment of physical functioning in the community in 5-to 15-year-olds. Previous validation of the ASK showed a significant difference in scores according to global ratings of disability. In this study, the ASK was administered to children without musculoskeletal disability to determine how normal respondents scored. ASK questionnaires were distributed to 137 children and 122 (89%) were returned. Normal children scored quite high, with a mean summary score of 93.12 (SD 6.45). This score differs significantly from the mean summary score for children with mild disabilities as determined in previous studies of disability (P = 0.005). / Study conducted at the Children’s Hospital of Eastern Ontario, Universityof Ottawa, Ottawa, Ontario, Canada. / Dr. Plint is supported in part by a Junior Clinical Investigator Award from the Children’s Hospital of Eastern Ontario Research Institute.

Let π1, ..., πk be k(&gt;_2) populations such that πi, i = 1, 2, ..., k, is characterized by the normal distribution with unknown mean and ui variance aio2 , where ai is known and o2 may be unknown. Suppose that on the basis of independent samples of size ni from π (i=1,2,...,k), we are interested in selecting a random-size subset of the given populations which hopefully contains the population with the largest mean.Based on likelihood ratios, several new procedures for this problem are derived in this report. Some of these procedures are compared with the classical procedure of Gupta (1956,1965) and are shown to be better in certain respects. / <p>Ny rev. utg.</p><p>This is a slightly revised version of Statistical Research Report No. 1978-6.</p> / digitalisering@umu