Design, construction and operation of the ProtoDUNE-SP Liquid Argon TPC

The ProtoDUNE-SP detector is a single-phase liquid argon time projection chamber (LArTPC) that was constructed and operated in the CERN North Area at the end of the H4 beamline. This detector is a prototype for the first far detector module of the Deep Underground Neutrino Experiment (DUNE), which will be constructed at the Sandford Underground Research Facility (SURF) in Lead, South Dakota, U.S.A. The ProtoDUNE-SP detector incorporates full-size components as designed for DUNE and has an active volume of 7 × 6 × 7.2 m3. The H4 beam delivers incident particles with well-measured momenta and high-purity particle identification. ProtoDUNE-SP's successful operation between 2018 and 2020 demonstrates the effectiveness of the single-phase far detector design. This paper describes the design, construction, assembly and operation of the detector components

Changes in sexual behavior following a sex education program in Brazilian public schools Mudanças no comportamento sexual de adolescentes de escolas públicas no Brasil após um programa de educação sexual

This paper describes an evaluation of possible changes in sexual behavior in adolescents who participated in a school-based sex education program in selected public schools in four municipalities in the state of Minas Gerais, Brazil. The program is inserted within the context of reproductive rights, deals with risks involved in unsafe sexual practices and focuses on the positive aspects of sexuality. A quasi-experimental design with pre and post-tests and a non-equivalent control group was used to evaluate the intervention. A total of 4,795 questionnaires were included in this analysis. The program succeeded in more than doubling consistent condom use with casual partners and in increasing the use of modern contraceptives during last intercourse by 68%. The intervention had no effect on age at first intercourse or on adolescents' engagement in sexual activities. The sex education program was effective in generating positive changes in the sexual behavior of adolescents, while not stimulating participation in sexual activities.<br>Este artigo descreve a avaliação de possíveis mudanças no comportamento sexual de adolescentes que participaram de um programa de educação sexual implementado em escolas públicas selecionadas em quatro municípios de Minas Gerais, Brasil. O programa está inserido no contexto dos direitos reprodutivos, discute os riscos de práticas sexuais inseguras e enfoca os aspectos positivos da sexualidade. Utilizou-se um desenho quase-experimental com pré e pós-teste e grupo controle não-equivalente. Foram incluídos 4.795 questionários na análise dos resultados. O programa conseguiu dobrar o uso consistente do preservativo com parceiro casual e aumentar em 68% o uso de métodos anticoncepcionais modernos na última relação sexual. A intervenção não teve efeito sobre a idade da primeira relação sexual ou na prática de atividades sexuais. Concluindo, o programa foi eficaz em gerar mudanças positivas no comportamento sexual de adolescentes sem antecipar ou estimular a prática sexual