Searching for the Annual Modulation of Dark Matter signal with the GENIUS-TF experiment

The annual modulation of the recoil spectrum observed in an underground detector is well known as the main signature of a possible WIMP signal. The GENIUS-TF experiment, under construction in the Gran Sasso National Laboratory, can search for the annual modulation of the Dark Matter signal using 40 kg of naked-Ge detectors in liquid nitrogen. Starting from a set of data simulated under the hypothesis of modulation and using different methods, we show the potential of GENIUS-TF for extracting the modulated signal and the expected WIMP mass and WIMP cross section.Comment: In press, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment (2003) and in Proc. of IDM2002, York Minster, England, 2-6 September, 2002, World Scientific 200

Education and inequality in Finland, Spain and Brazil

Production of INCASI Project H2020-MSCA-RISE-2015 GA 691004Finland, Spain and Brazil are three very internally complex and heterogeneous realities, with contradictions and permanent reforms to their education systems. In a first quantitative approach each country can be placed in a continuum of the education system that goes from most successful in terms of reaching a high level of education all across the population, in conditions of equity and facilitating youths' incorporation into the labour market, to least successful, with Finland and Brazil occupying either end of the spectrum respectively and Spain occupying an intermediate situation. Although there are differences, they share certain tensions in their respective education systems. On the one hand, about the conception of education, ranging from more utilitarian, human capital theories, to the more humanist and civic-minded perspective. On the other hand, the challenge of comprehensiveness between an academic and a vocational path. In addition, there is also the challenge of improving the education level of the population while also improving equality. The tensions differ from country to country, since their education traditions and cooperation and conflict strategies between the education agents, with varying levels of resources and different alliances with political actors vary, as does the social consensus

Experimental Search for Solar Axions via Coherent Primakoff Conversion in a Germanium Spectrometer

Results are reported of an experimental search for the unique, rapidly varying temporal pattern of solar axions coherently converting into photons via the Primakoff effect in a single crystal germanium detector. This conversion is predicted when axions are incident at a Bragg angle with a crystalline plane. The analysis of approximately 1.94 kg.yr of data from the 1 kg DEMOS detector in Sierra Grande, Argentina, yields a new laboratory bound on axion-photon coupling of $g_{a\gamma \gamma} < 2.7\cdot 10^{-9}$ GeV$^{-1}$, independent of axion mass up to ~ 1 keV.Comment: RevTeX, 11 pages, figures can be obtained by fax from [email protected]. Submitted to Phys. Lett.

Vulnerabilidades ao HIV/aids no Contexto Brasileiro: iniquidades de gênero, raça e geração

OBJETIVO: Analisar o conhecimento da população sobre DST/aids, bem como os discursos sobre o uso do preservativo e das práticas sexuais. MÉTODOS: Pesquisa qualitativa com 64 indivíduos jovens e adultos, brancos e negros, sexualmente ativos, de ambos os sexos. A vulnerabilidade ao HIV/aids foi discutida a partir da perspectiva racial (negros ou brancos), geracional (entre 16 e 24 anos ou 45 e mais) e de gênero (masculino ou feminino). Foram realizadas entrevistas em profundidade com roteiro semiestruturado nas cidades de São Paulo (SP) e Recife (PE), sobre os temas: conhecimento e percepção sobre DST/aids, percepção de risco individual, negociação e uso de preservativos, iniciação sexual e práticas sexuais. RESULTADOS: Os indivíduos menos escolarizados, os homens, os mais velhos e os moradores de Recife foram os menos informados sobre DST/aids. Pessoas acima de 45 anos e os menos escolarizados possuíam conhecimento incipiente sobre as formas de transmissão e prevenção das DST/aids. O uso do preservativo entre os entrevistados de ambas as cidades foi relativamente baixo; a não utilização do preservativo entre as mulheres em relação estável foi atribuída à negativa do parceiro. Entre os entrevistados que declararam usar o preservativo, o tipo de relação estabelecida e a fase do relacionamento resultaram em padrões de uso diversificados; o uso consistente do preservativo foi mais frequente nas parcerias eventuais. CONCLUSÕES: O conhecimento incipiente aliado à prática sexual insegura coloca mulheres unidas, de baixa escolaridade, menor renda, sobretudo acima dos 45 anos, e os residentes de Recife em situação de maior vulnerabilidade às DST/aids.OBJECTIVE: The objective of this paper is to assess the level of knowledge and information held by the population about HIV/AIDS, and to analyze discourses about condom use and sexual practices. METHODS: Qualitative research with 64 young people and adults, black and white, sexually active men and women. Vulnerability to HIV/AIDS was discussed from the perspective of racial (black or white), generational (between 16 and 45 or 24 years or older) and gender (male or female). In-depth interviews were conducted with a semi-structured script in the cities of São Paulo (SP) and Recife (PE) on the following themes: knowledge and perception about STD/AIDS, perception of individual risk, negotiation and condom use, sexual initiation and practices. RESULTS: The least-educated, men, elders and residents of Recife were the least informed persons as regards to HIV/AIDS. People over 45 years and the less educated had incipient knowledge about transmission and prevention of STD/AIDS. Condom use among respondents in both cities was relatively low, non-use of condoms among women in stable relationship was attributed to partner's refusal to using it. Among respondents who reported using condoms, the type of relationship established and the phase of the relationship resulted in varied patterns of use; the consistent use of condoms was more common in occasional partnerships. CONCLUSIONS: The incipient knowledge in association with unsafe sexual practice puts women in stable relationship, poorly educated, lower income, particularly above 45 years, and residents of Recife in a situation of greater vulnerability to STD/AIDS