Limiter lock systems at TEXTOR: flexible tools for plasma-wall investigation

Limiter lock systems on the top and the bottom of the TEXTOR vessel are essential elements for experimental investigations of plasma-wall interaction in a tokamak. The lock systems are designed as user facilities that allow the insertion of wall elements (limiter) and tools for diagnostic (electrical probes, gas injection) without breaking the TEXTOR vacuum. The specially designed holder on top of the central carrier and a powerful vacuum pump system permit the exchange of components within similar to1 h. Up to ten electrical signals, four thermocouples, and a gas supply can be connected at the holder interface. Between discharges, the inserted component can be positioned radially and turned with respect to the toroidal magnetic field. Additionally, the central carrier is electrically isolated to apply bias voltages and currents up to 1 kV and 1 kA, respectively.An important feature of the lock system is the good access for optical spectroscopic observation of the inserted components in the vicinity of the edge plasma. The whole spectrum from ultraviolet to infrared is covered by spectrometers and filters combined with cameras. Toroidally and poloidally resolved measurements are obtained front the view on top of the probes while the tangential poloidal view delivers radially and toroidally resolved information.A programmable logic controller (Simatic S5) that is operated inside the TEXTOR bunker and from remote locations outside the concrete wall drives all possible features of the lock system

O ensino de PHP em páginas web dinâmicas através do desenvolvimento de um "fórum online sobre património cultural"

Relatório da Prática de Ensino Supervisionada, Mestrado em Ensino da Informática, Universidade de Lisboa, Instituto de Educação, 2020O presente relatório foi concretizado no âmbito da unidade curricular de Iniciação à Prática Profissional IV do Mestrado em Ensino da Informática do Instituto de Educação da Universidade de Lisboa. Retrata a intervenção pedagógica na Escola Secundária Gago Coutinho, numa turma do segundo ano do Curso Profissional de Técnico de Gestão e Programação de Sistemas Informáticos na disciplina de Redes de Comunicação e concretamente no final do módulo cinco: “Desenvolvimento de Páginas Web Dinâmicas” com a duração de catorze tempos letivos de quarenta e cinco minutos de prática de ensino supervisionada. Em virtude da suspensão das aulas presenciais por ordem do Governo a dezasseis de março de 2020 devido à pandemia COVID-19, quatro tempos decorreram presencialmente e dez tempos letivos decorreram à distância de forma síncrona via Zoom. Os conteúdos programáticos abordados foram os seguintes: sessões, cookies, tratamento de erros na linguagem PHP (PHP: Hypertext Preprocessor) e a consolidação de conhecimentos em linguagens PHP, HTML (Hyper Text Markup Language), CSS (Cascading Style Sheets) e SQL (Structured Query Language), que permitiram criar um fórum online sobre o património do concelho de Vila Franca de Xira que se enquadrou no tema do DAC (Domínio de Autonomia Curricular) da turma. Foi realizado um trabalho interdisciplinar e de articulação curricular privilegiando o trabalho prático e o desenvolvimento das capacidades de pesquisa, relação e análise, com vista ao desenvolvimento das áreas de competências inscritas no Perfil dos Alunos à Saída da Escolaridade Obrigatória. No decorrer da prática de ensino supervisionada foram usadas várias metodologias, nomeadamente a ativa, interrogativa e também a expositiva, de modo a minimizar as dificuldades identificadas por alguns autores no ensino dos princípios da programação aos alunos. Por fim, com o objetivo de avaliar de forma contínua as atitudes, o trabalho desenvolvido pelos alunos e a aquisição de conhecimentos, foram utilizadas ferramentas de avaliação diagnóstica, formativa e sumativa.The following report was accomplished in the curricular unit ambit of Initiation to Professional Practice IV Master’s Degree in Computer Science Teaching at Lisbon University, Educational Institute. The pedagogical intervention retracts the Secondary School Gago Coutinho, of an A-levels class from a Professional and Technical course in Management and Computer Systems Developer, considering the subject of communication networks, more precisely at the end of the 5th unit: “Dynamic Web Pages Development” the supervised teaching practice had the duration of 14 academic days which lasted 45 minutes each. Due to the COVID-19 pandemic, school suspension of presential classes was ordered by the government, March 16th of 2020, so only 4 academic days were attended. The remaining 10 occurred in long-distance learning synchronously using Zoom. The addressed programmatic contents were the following: sessions, cookies, language error treatment PHP (PHP: Hypertext Preprocessor) and knowledge in languages consolidation in PHP, HTML (HyperText Markup Language), CSS (Cascading Style Sheets) e SQL (Structured Query Language), which allowed to create an online forum about Vila Franca de Xira municipality Patrimony, and framed the theme CAD (Curricular Autonomy Dominance) of the class. An interdisciplinary work was carried out in the curricular articulation, privileging the practical work. Development of searching capabilities, relationship association, and analyse. Considering this, the intent is to develop the several knowledge areas enrolled in the student’s profile when they exit the obligatory schooling. During the practicing supervised taught, several methodologies were used. Such as active, interrogative, and expositive, to minimize the difficulties presented by some authors concerning teaching programming principal to students. To summarize, the objective is: To evaluate the attitudes continuously, the acquisition of knowledge, and work developed by the students. This became possible using tools of diagnostic, formative, and summative evaluation

Experimental characterization of anomalous strong scattering of mm-waves in TEXTOR plasmas with rotating islands

Anomalous scattering of high power millimetre waves from gyrotrons at 140 and 110 GHz is investigated for plasma with rotating islands at TEXTOR. The magnetic field and plasma density influence the spectral content of the scattered waves and their power levels significantly. Anomalous strong scattering occurs in two density regimes, one at low densities and one at high densities, that also depend on the magnetic field. The two regimes are separated by a quiescent regime without anomalous scattering. Investigations suggest that scattering in the high-density regime is generated at the low-field side intersection of the gyrotron beam and the island position. The transition from the quiescent regime to the high-density regime occurs when the gyrotron frequency is twice the upper hybrid frequency at this position. There is some evidence that the scattering in the low-density regime is generated near the plasma centre. Under this assumption all the observed scattering is generated when the gyrotron frequency is near or below twice the upper hybrid frequency

Suicidal thoughts and depressive feelings amongst Estonian schoolchildren: effect of family relationship and family structure

Depressive feelings and suicidal ideation in a non-clinical sample of adolescents in Estonia were analysed in the context of family structure, mutual relationships amongst family members and schoolchildren's preferences regarding intimate personal contacts with particular family members. Data from the WHO collaborative study 'Health Behaviour in School-aged Children 2005/2006' (HBSC) were used. A representative sample of schoolchildren aged 11, 13 and 15 years completed the semi-structured questionnaire. The analyses included only adolescents living in households with at least one birth parent. The subjects were 4,389 schoolchildren (2,178 boys and 2,211 girls), who were divided into three groups based on: (1) suicidal thoughts, with or without depressive feelings; (2) depressive feelings; and (3) neither suicidal thoughts nor depressive feelings. Multinomial logistic regression was used. The proportion of depressive feelings increased with age for both boys and girls. Girls expressed depressive feelings more frequently than boys from ages 13 and 15 years, and suicidal thoughts from age 15 years. Self-reported satisfaction with relationships in the family reduced the likelihood of depressive feelings and suicidal thoughts. Good communication with the parents reduced the likelihood of suicidal thoughts in all age groups. Adolescents who were satisfied with their family relationships suffered less frequently from depressive feelings and suicidal thoughts. The best environment for an adolescent was a family with both birth parents. Of the adolescents in 'non-intact' families, those with a step-parent in the family showed suicidal thoughts more frequently than those in single-parent families. Associations between family-related variables and suicidal thoughts were significant even after adjusting for family economic deprivation score