Coupling between whistler waves and slow-mode solitary waves

The interplay between electron-scale and ion-scale phenomena is of general interest for both laboratory and space plasma physics. In this paper we investigate the linear coupling between whistler waves and slow magnetosonic solitons through two-fluid numerical simulations. Whistler waves can be trapped in the presence of inhomogeneous external fields such as a density hump or hole where they can propagate for times much longer than their characteristic time scale, as shown by laboratory experiments and space measurements. Space measurements have detected whistler waves also in correspondence to magnetic holes, i.e., to density humps with magnetic field minima extending on ion-scales. This raises the interesting question of how ion-scale structures can couple to whistler waves. Slow magnetosonic solitons share some of the main features of a magnetic hole. Using the ducting properties of an inhomogeneous plasma as a guide, we present a numerical study of whistler waves that are trapped and transported inside propagating slow magnetosonic solitons.Comment: Submitted to Phys. of Plasma

Psicoterapia de grupo en hospital-día psiquiátrico

Este estudo objetivou estudar a psicoterapia de grupo em um hospital-dia psiquiátrico, caracterizando os pacientes dos grupos, os temas discutidos, a frequência das verbalizações e o manejo terapêutico das sessões. O método foi quanti-qualitativo, categorial temático. Os pacientes eram heterogêneos e os grupos abertos, com duração de uma hora. Emergiram dos grupos seis categorias temáticas. Os pacientes verbalizaram 56% do total das 2.459 falas. No manejo técnico das sessões predominou o apoio, a ênfase no aqui-e-agora e a estrutura na condução dos grupos. Concluiu-se que, nas sessões analisadas, houve espaço para a fala dos pacientes, sendo estas manejadas terapeuticamente.This study evaluated psychotherapy group at a psychiatric day-hospital, characterizing the groups' structure, content, frequency of verbalization and therapeutic management of meetings. Quantitative and qualitative methods with a categorical thematic approach were used. The patients were heterogeneous and groups were open with one-hour meetings. Six categories emerged from the thematic groups. The participants verbalized 56% of the 2,459 verbal accounts. During technical management of meetings predominated: support, emphasis on the here-and-now, and structure in guiding group behavior. The conclusion is that there were opportunities for patients to express themselves and these manifestations were therapeutically managed.El objetivo de este trabajo fue estudiar la psicoterapia de grupo en un hospital-día psiquiátrico, investigando las características de los pacientes en los grupos, los temas discutidos, la frecuencia de las verbalizaciones y el manejo de las sesiones terapéuticas. La metodología utilizada ha sido cuantitativa y cualitativa. Los pacientes eran heterogéneos y los grupos abiertos, con sesiones de una hora de duración. Seis categorías temáticas emergieron de los grupos. Los pacientes verbalizaron 56% del total de los 2.459 registros orales. En el manejo técnico de las sesiones predominó el apoyo, el énfasis en lo aquí-y-ahora y la estructura en la conducción de los grupos. Se concluye que, en las sesiones analizadas, hubo espacio para las manifestaciones orales de los pacientes, que han sido conducidas terapéuticamente

La Charte canadienne des droits et libertés comme instrument de dialogue entre le tribunal et le législateur

Of eleven proteins analyzed in four Amazonian populations, the esterases showed the greatest variation, with five activity zones. EST1, EST2 and EST5 showed variation in each of the populations studied. EST1 and EST2 are each controlled by two, and EST5 by four, codomi-nant alleles. LAP presented six activity zones, with codominant variation in LAP5and LAP6.oc-GPDH was monomorphic with one activity band on starch gel and two on polyacrylamide gel. 1DH presented two activity zones, with variation in the IDHl region. PGM had a single activity zone, with variation in all populations. The Ariquemes populations showed five alleles and the other populations three, all of then codominant. Three activity zones with two codominant alleles were observed for ODH. Aldehyde Oxidase showed two activity zones, with variation in AOl only in the Ariquemes and Porto Velho/Samuel populations. 6-PGDH showed only one activity zone and variation only in the Ariquemes population. The remaing systems - XDH, G-6-PDH and GDH. was monomorphic.Dos 11 sistemas protéicos analisados, em quatro populações da Amazônia, as esterases foram as que apresentaram maior variação, com cinco zonas de atividade. EST1, EST2, e EST5 mostraram variação genética determinada em todas populações estudadas, sendo que as duas primeiras são resultantes do controle de dois alelos e a EST5 de quatro, todos codominantes. A LAP consiste de seis zonas de atividade e com variação apenas nos loci LAP5e LAP6,ambos codominantes. A GPDH mostrou-se monomórfica com uma zona de atividade em gel de amido e duas em poliacrilamida. A IDH apresentou duas zonas de atividade, com variação na região da IDH1. A PGM consiste de uma única zona de atividade e com variação em todas as populações estudadas. A população de Ariquemes revelou cinco alelos e as demais três, todos codominantes. Para a ODH, foram observadas três zonas de atividade com dois alelos codominantes. A enzima AO apresentou duas zonas de atividade, sendo que a AOl mostrou-se variável apenas em Ariquemes e Porto Velho/Samuel. 6-PGDH possui apenas uma zona de atividade e variação apenas em Ariquemes. Os demais sistemas - XDH, G-6-PDH e GDH - mostraram-se monomórficos

Observations of whistler mode waves with nonlinear parallel electric fields near the dayside magnetic reconnection separatrix by the Magnetospheric Multiscale mission

We show observations from the Magnetospheric Multiscale (MMS) mission of whistler mode waves in the Earth's low-latitude boundary layer (LLBL) during a magnetic reconnection event. The waves propagated obliquely to the magnetic field toward the X line and were confined to the edge of a southward jet in the LLBL. Bipolar parallel electric fields interpreted as electrostatic solitary waves (ESW) are observed intermittently and appear to be in phase with the parallel component of the whistler oscillations. The polarity of the ESWs suggests that if they propagate with the waves, they are electron enhancements as opposed to electron holes. The reduced electron distribution shows a shoulder in the distribution for parallel velocities between 17,000 and 22,000 km/s, which persisted during the interval when ESWs were observed, and is near the phase velocity of the whistlers. This shoulder can drive Langmuir waves, which were observed in the high-frequency parallel electric field data

Sous la direction de Patrice PAVIS et Rodrigue VILLENEUVE, Protée, spécial « Gestualités », vol. 21, no 3, Université du Québec à Chicoutimi, en collaboration avec la revue Assaph, Université de Tel-Aviv, automne 1993, 124 ., ill.

Six esterase isozymes were studied during the development of Anopheles darlingi by using polyacrylamide gel electrophoresis and two different substrates, a-naphthylcelate and a-naphthylpropionate. Esterases 5 and 6'were detected in all developmental stages esterases 1 and 2 were more intensively stained if larvae, while esterases 3 and 4 were better visualized in pupae and adults. Strong differences in intensity of some of the isozymes were observed during the pupal stage.Four out of the six isozymes showed variation in the electrophoretic mobility. Esterase-2 was choosed for genetic studies, because was the best stained isozyme in the gels. Two codominant alleles {Est2*S and Est2*F) code for this polymorphic system, with the Est*S frequency equal to 0.521. Phenotypic distribution is in agreement with hardy-Weinberg expectations.Seis isoenzimas de esterase foram estudadas durante o desenvolvimento de Anopheles darlingi usando eletroforese em gel de poliacrilamida e dois substratos diferentes, a-naftilacetato e a-naftliproprlonato. Esterases 5 e 6 foram detectados em todos os estágios do desenvolvimento, esterases 1 e 2 foram coradas com maior intensidade em larva, enquanto esterases 3 e 4 foram melhor visualizadas em pupa e adulto. Foram observadas grandes diferenças na intensidade de algumas isoenzimas durante o estágio de pupa,Quatro das seis isoenzimas revelaram variações na mobilidade eletroforética. A esterase 1 foi a escolhida para estudos genéticos, em virtude de ter sido a isoenzima que apresentou melhor coloração no gel. Dois alelos codominantes (Est 2*S e Est 2*F) codificam para este sistema polimórfico, com a freqüência de Est*S igual a 0,521. A distribuição fenotipica está de acordo com o esperado em Hardy - Weinberg

Diversidade genética da soja entre períodos e entre programas de melhoramento no Brasil.

O objetivo deste trabalho foi detectar os efeitos do melhoramento sobre a diversidade do germoplasma da soja cultivada nas três ultimas décadas, por meio da comparação de seis programas de melhoramento e períodos de lançamento de cultivares, utilizando locos microssatélites. Em relação aos programas de melhoramento, todos os locos apresentaram diferenças significativas em suas distribuições alélicas. Alguns locos eram compostos de alelos exclusivos em alguns programas de melhoramento, enquanto outros foram compostos sempre dos mesmos alelos em maior freqüência para todos os programas. A AMOVA indicou maior porção da variância devido a cultivares dentro de programas e somente 5,3% (p0,05). Os resultados sugerem que o germoplasma de soja utilizado em programas de melhoramento no Brasil manteve nível constante de diversidade genética nos últimos 30 anos, além de relativa heterogeneidade de determinados programas.Nome correto do quarto autor ARANTES, N. E

HD 51106 and HD 50747: an ellipsoidal binary and a triple system observed with CoRoT

We present an analysis of the observations of HD 51106 and HD 50747 by the satellite CoRoT, obtained during its initial run, and of the spectroscopic preparatory observations. AIMS: We complete an analysis of the light curve, extract the main frequencies observed, and discuss some preliminary interpretations about the stars. Methods: We used standard Fourier transform and pre-whitening methods to extract information about the periodicities of the stars. Results: HD 51106 is an ellipsoidal binary, the light curve of which can be completely explained by the tidal deformation of the star and smaller secondary effects. HD 50747 is a triple system containing a variable star, which exhibits many modes of oscillation with periods in the range of a few hours. On the basis of this period range and the analysis of the physical parameters of the star, we conclude that HD 50747 is a Gamma-Doradus star.Comment: 7 pages, 8 figures, use (Astronomy-Astrophysics format/macro LAtex

The Search Coil Magnetometer for THEMIS

International audienceTHEMIS instruments incorporate a tri-axial Search Coil Magnetometer (SCM) designed to measure the magnetic components of waves associated with substorm breakup and expansion. The three search coil antennas cover the same frequency bandwidth, from 0.1 Hz to 4 kHz, in the ULF/ELF frequency range. They extend, with appropriate Noise Equivalent Magnetic Induction (NEMI) and sufficient overlap, the measurements of the fluxgate magnetometers. The NEMI of the searchcoil antennas and associated pre-amplifiers is smaller than 0.76 pT/ p Hz at 10 Hz.The analog signals produced by the searchcoils and associated preamplifiers are digitized and processed inside the IDPU, together with data from the EFI instrument. Searchcoil telemetry includes waveform transmission, FFT processed data, and data from a filter bank. The frequency range covered in waveform depends on the available telemetry. The searchcoils and their three axis structures have been precisely calibrated in a quiet site, and the calibration of the transfer function is checked on board usually once per orbit. The tri-axial searchcoils implemented on the five THEMIS spacecraft are working nominally

Reflexiones sobre las actividades del Departamento de Expresión Gráfica Arquitectónica

Junta de Andalucía-Consejería de Política TerritorialEscuela Técnica Superior de Arquitectura de la Universidad de SevillaExcmo. Ayuntamiento de SevillaColegio Oficial de Arquitectos de Andalucía Occidenta