Photoionization cross sections for O-like S IX: a Breit-Pauli R-matrix calculation

In this paper we present photoionization cross sections for the lowest five states of O-like S IX (1s(2)2s(2)2p(4) P-3(0,1,2), D-1(2), S-1(0)). The relativistic Breit-Pauli R-matrix codes were utilized including all terms of the 2s(2)2p(3), 2s2p(4), 2p(5), 2s(2)2p(2)3s, 3p, 3d and 2s2p(3)3s, 3p, 3d configurations in the expansion of the collision wavefunction for S X. It was also found that to achieve convergence of the low-lying energy separations of the target levels, an additional 21 configuration functions needed to be included in the configuration interaction expansion, incorporating two-electron excitations from the 2s and 2p shells to the 3s, 3p and 3d shells. The present work thus constitutes the most sophisticated photoionization evaluation for ground and metastable levels of the S IX ion. Direct comparisons have been made with the only available data found on the OPEN-ADAS database between level resolved contributions of the spectrum. This comparison for the background cross section exhibits excellent agreement at all photon energies for each partial photoionization cross section contribution investigated. Finally, the autoionizing bound states arising from numerous open channels have also been investigated and identified using the QB approach, a procedure for analyzing resonances in atomic and molecular collision theory which exploits the analytic properties of R-matrix theory. Major Rydberg resonance series are also presented and tabulated for the dominant linewidths considered.

Evaluation of an improved atomic data basis for carbon in UEDGE emission modeling for L-mode plasmas in DIII-D

New scaled carbon atomic electron-impact excitation data is utilized to evaluate comparisons between experimental measurements and fluid emission modeling of detached plasmas at DIII-D. The C I and C II modeled emission lines for 909.8 and 514.7 nm were overestimated by a factor of 10-20 than observed experimentally for the inner leg, while the outer leg was within a factor of 2. Due to higher modeled emissions, a previous study using the UEDGE code predicted that a higher amount of carbon was required to achieve a detached outboard divertor plasma in L-mode at DIII-D. The line emission predicted by using the new scaled carbon data yields closer results when compared against experiment. We also compare modeling and measurements of Dα emission from neutral deuterium against predictions from newly calculated R-Matrix with pseudostates data available at the ADAS database. © 2013 Published by Elsevier B.V.

Electron-impact excitation of Xe 26+ and its resultant spectral signature

We have carried out a 129 close-coupling level Dirac-Coulomb R-matrix calculation for the electron-impact excitation of Ni-like Xe. We have utilized this data to generate the spectral signature of Xe26+ in terms of feature photon-emissivity coefficients (F-PεCs). We have compared these F-PεCs with those generated using semi-relativistic plane-wave Born excitation data, which forms the heavy species baseline for the Atomic Data and Analysis Structure (ADAS), We find that the Born-based F-PεCs give a reasonable qualitative description of the spectral signature but that, quantitatively, the R-matrix-based F-PεCs differ by up to a factor of 2. The spectral signature of heavy species is key to diagnosing hot plasmas such as will be found in the International Thermonuclear Experimental Reactor.

Collisional-radiative study of lithium plasmas

The sensitivity of lithium plasma models to the underlying atomic data is investigated. Collisional-radiative modeling is carried out with both the Los Alamos and ADAS suite of codes. The effects of plane-wave Born, distorted-wave, and nonperturbative R -matrix with pseudostates and time-dependent close-coupling electron impact atomic data on derived plasma quantities such as the ionization balance and radiated power are studied. Density and temperature regimes are identified where nonperturbative excitation and ionization rate coefficients must be used. The electron temperature and density ranges investigated were 0.2 eV<or = T(e) <or =90 eV and 10(10) cm(-3) <or = N(e) <or = 10(14) cm(-3).

Generalized collisional radiative model for light elements: C: Data for the B isonuclear sequence

A first stage collision database is assembled which contains electron-impact excitation, ionization,\r and recombination rate coefficients for B, B + , B 2+ , B 3+ , and B 4+ . The first stage database\r is constructed using the R-matrix with pseudostates, time-dependent close-coupling, and perturbative\r distorted-wave methods. A second stage collision database is then assembled which contains\r generalized collisional-radiative ionization, recombination, and power loss rate coefficients as a\r function of both temperature and density. The second stage database is constructed by solution of\r the collisional-radiative equations in the quasi-static equilibrium approximation using the first\r stage database. Both collision database stages reside in electronic form at the IAEA Labeled Atomic\r Data Interface (ALADDIN) database and the Atomic Data Analysis Structure (ADAS) open database.

Generalized collisional radiative model for light elements. Part B: Data for the Be isonuclear sequence

A first-stage collision database is assembled which contains electron-impact excitation, ionization, and recombination rate coefficients for Be, Be+, Be2+, and Be3+. The first-stage database is constructed using the R-matrix with pseudo-states, time-dependent close-coupling, and perturbative, distorted-wave methods. A second-stage collision database is then assembled which contains generalized collisional-radiative and radiated power loss coefficients. The second-stage database is constructed by solution of collisional-radiative equations in the quasi-static equilibrium approximation using the first-stage database. Both collision database stages reside in electronic form at the ORNL Controlled Fusion Atomic Data Center and in the ADAS database, and are easily accessed over the worldwide internet. © 2007 Elsevier Inc. All rights reserved.

Generalised collisional-radiative model for light elements. A: Data for the Li isonuclear sequence

A first stage collision database is assembled which contains electron-impact effective collision strengths, and ionization and recombination rate coefficients for Li, Li+, and Li2+. The first stage database is constructed using the R-matrix with pseudo-states, time-dependent close-coupling, converged close-coupling, and perturbative distorted-wave methods. A second stage collision database is then assembled which contains generalized collisional-radiative and radiated power loss coefficients. The second stage database is constructed by solution of collisional-radiative equations in the quasi-static equilibrium approximation using the first stage database. Both collision database stages reside in electronic form at the ORNL Controlled Fusion Atomic Data Center and in the ADAS database, and are easily accessed over the worldwide internet. ?? 2006 Elsevier Inc. All rights reserved.

Atomic data for modelling fusion and astrophysical plasmas

Trends and focii of interest in atomic modelling and data are identified in connection with recent observations and experiments in fusion and astrophysics. In the fusion domain, spectral observations are included of core, beam penetrated and divertor plasma. The helium beam experiments at JET and the studies with very heavy species at ASDEX and JET are noted. In the astrophysics domain, illustrations are given from the SOHO and CHANDRA spacecraft which span from the solar upper atmosphere, through soft x-rays from comets to supernovae remnants. It is shown that non-Maxwellian, dynamic and possibly optically thick regimes must be considered. The generalized collisional-radiative model properly describes the collisional regime of most astrophysical and laboratory fusion plasmas and yields self-consistent derived data for spectral emission, power balance and ionization state studies. The tuning of this method to routine analysis of the spectral observations is described. A forward look is taken as to how such atomic modelling, and the atomic data which underpin it, ought to evolve to deal with the extended conditions and novel environments of the illustrations. It is noted that atomic physics influences most aspects of fusion and astrophysical plasma behaviour but the effectiveness of analysis depends on the quality of the bi-directional pathway from fundamental data production through atomic/plasma model development to the confrontation with experiment. The principal atomic data capability at JET, and other fusion and astrophysical laboratories, is supplied via the Atomic Data and Analysis Structure (ADAS) Project. The close ties between the various experiments and ADAS have helped in this path of communication.

Automatic information and safety systems for driving assistance

O objeto principal desta tese é o estudo de algoritmos de processamento e representação automáticos de dados, em particular de informação obtida por sensores montados a bordo de veículos (2D e 3D), com aplicação em contexto de sistemas de apoio à condução. O trabalho foca alguns dos problemas que, quer os sistemas de condução automática (AD), quer os sistemas avançados de apoio à condução (ADAS), enfrentam hoje em dia. O documento é composto por duas partes. A primeira descreve o projeto, construção e desenvolvimento de três protótipos robóticos, incluindo pormenores associados aos sensores montados a bordo dos robôs, algoritmos e arquitecturas de software. Estes robôs foram utilizados como plataformas de ensaios para testar e validar as técnicas propostas. Para além disso, participaram em várias competições de condução autónoma tendo obtido muito bons resultados. A segunda parte deste documento apresenta vários algoritmos empregues na geração de representações intermédias de dados sensoriais. Estes podem ser utilizados para melhorar técnicas já existentes de reconhecimento de padrões, deteção ou navegação, e por este meio contribuir para futuras aplicações no âmbito dos AD ou ADAS. Dado que os veículos autónomos contêm uma grande quantidade de sensores de diferentes naturezas, representações intermédias são particularmente adequadas, pois podem lidar com problemas relacionados com as diversas naturezas dos dados (2D, 3D, fotométrica, etc.), com o carácter assíncrono dos dados (multiplos sensores a enviar dados a diferentes frequências), ou com o alinhamento dos dados (problemas de calibração, diferentes sensores a disponibilizar diferentes medições para um mesmo objeto). Neste âmbito, são propostas novas técnicas para a computação de uma representação multi-câmara multi-modal de transformação de perspectiva inversa, para a execução de correcção de côr entre imagens de forma a obter mosaicos de qualidade, ou para a geração de uma representação de cena baseada em primitivas poligonais, capaz de lidar com grandes quantidades de dados 3D e 2D, tendo inclusivamente a capacidade de refinar a representação à medida que novos dados sensoriais são recebidos.

Costumes e foros de Riba-Côa : normativa e sociedade

Tese de doutoramento, História (História Medieval), Universidade de Lisboa, Faculdade de Letras, 2014

Las barriadas tambi??n leen

Proyecto destinado a mejorar el dominio de la lectura en varios centros p??blicos y localidades del t??rmino municipal de San Roque -Estaci??n de San Roque, Puente Mayorga, San Enrique de Guadiaro, Guadiaro. Este proyecto pretende que la barr??adas tengan el mismo tipo de acceso a la cultura que los centros urbanos de los que dependen.

Dialog??ndo se resuelven los conflictos

resumen tomado del autor

Diez propuestas did??cticas para el conocimiento del noroeste murciano en la Ense??anza Secundaria Obligatoria

Documento que recoge un total de diez propuestas dise??adas con encuadres curriculares, materiales de apoyo, valoraciones did??cticas y un soporte justificativo y documental. Contempla aspectos significativos y relevantes de la realidad del noroeste murciano, incluyendo propuestas de visitas o desplazamientos a algun municipio de los que integran la comarca, recogiendo sesiones de trabajo previo en el aula. Los objetivos que se persiguen con este trabajo son promover la dinamizaci??n educativa del ??mbito mediante modelos de actuaci??n que supongan la concreci??n y el desarrollo de actividades adecuadas para el conocimiento del noroeste murciano y aportar al profesorado de la zona los recursos pedag??gicos y documentales que puedan contribuir a la mejora de sus pr??cticas docentes y de la dinamizaci??n educativa. Como objetivo complementario pretende contribuir a la tarea social y colectiva de profundizaci??n y arraigo en la pertenecia a una determinada comarca natural a trav??s del mayor conocimiento de la misma.

Salud y desarrollo sostenible

Bibliograf??a e hiperv??nculos al final de algunos cap??tulos

La evaluaci??n de la Formaci??n Ocupacional : dise??o y aplicaci??n de un modelo para la autoevaluaci??n de centros

Elaborar y aplicar un modelo de autoevaluaci??n para que pueda ser utilizado por los centros que desarrollan acciones formativas en el marco del Plan Nacional de Formaci??n para la Inserci??n Laboral (Plan FIP) con el fin de que puedan revisar su organizaci??n y funcionamiento y elaborar planes de mejora que permitan incrementar su eficacia. 4 Centros de Formaci??n Profesional Ocupacional de Asturias en: Oviedo, Langreo, Gij??n y Avil??s. El proceso evaluador se organiza entorno a 5 fases: 1) Fase preparatoria: an??lisis de la informaci??n existente sobre la tem??tica de estudio, elaboraci??n de una propuesta de autoevaluaci??n y negociaci??n del estudio con la administraci??n. 2) Fase de elaboraci??n interna/externa: elaboraci??n de una Gu??a de Autoevaluaci??n de Centros de Formaci??n Ocupacional. 3) Fase de aplicaci??n: selecci??n de centros, recogida y an??lisis de informaci??n. 4) Fase de s??ntesis, validaci??n y elaboraci??n de un Plan de Mejora: validaci??n del modelo de evaluaci??n seleccionado, elaboraci??n del informe de resultados y definici??n del Plan de Mejora com??n a los cuatro centros objeto de estudio. 5) Fase de resultados: conclusiones del estudio y elaboraci??n de un informe sobre el proceso de investigaci??n. Gu??a para la autoevaluaci??n de los Centros de Formaci??n Ocupacional organizada en ocho dimensiones compuestas, a su vez, por unidades de an??lisis en d??nde se especifican los indicadores de calidad. Cinco de estas dimensiones hacen referencia a los Agentes Facilitadores: planificaci??n de la formaci??n, recursos humanos, recursos materiales y convenios, direcci??n y gesti??n del centro y desarrollo de los programas de formaci??n. Las otras tres dimensiones se refieren a resultados: satisfacci??n de los alumnos, satisfacci??n del personal e inserci??n laboral. Se elaboran tambi??n unos protocolos de trabajo de las dimensiones, un protocolo para la elaboraci??n del autoinforme y otro para la validaci??n de la Gu??a. La metodolog??a empleada utiliza tanto estrategias cualitativas, para el proceso de elaboraci??n del modelo de autoevaluaci??n, como cuantitativas para el proceso de validaci??n del mismo. Presentaci??n de una herramienta que puede ser utilizada por los centros como gu??a metodol??gica para llevar a cabo procesos de autoevaluaci??n. Dicha herramienta ofrece, adem??s, instrumentos y orientaciones que facilitan el desarrollo de este tipo de procesos, as?? como de protocolos tanto de trabajo de campo como para la elaboraci??n de los autoinformes sobre resultados. En relaci??n a la Gu??a de Autoevaluaci??n elaborada se afirma: 1) La estructura y dise??o del modelo logra diagnosticar en un alto grado de especificidad y concreci??n la situaci??n de las instituciones que participan en el estudio. 2) Las herramientas dise??adas a lo largo del trabajo se constituyen como instrumentos ??tiles y contextualizados de cara a facilitar el desarrollo de procesos de autoevaluaci??n. 3) Dada la estructura de la Gu??a y el modelo utilizado como referente para su elaboraci??n esta se perfila como un documento flexible y adecuado que permite su adaptaci??n a diferentes tipos de instituciones que imparten Formaci??n Profesional. 4) La Gu??a y los elementos que la integran se constituyen como un instrumento operativo y eficaz para el desarrollo de los procesos de autoevaluaci??n en las instituciones participantes en el estudio.