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Resumo O artigo objetiva reconstruir a memória do acervo arqueológico da Usina Hidrelétrica de Balbina, situada no município de Presidente Figueiredo, estado do Amazonas. Para isso, abordamos aspectos ligados à Arqueologia amazônica e à construção de usinas geradoras de energia elétrica na década de 1980, bem como as políticas do licenciamento ambiental brasileiras. Partimos do debate sobre formação de acervos arqueológicos no Brasil tendo em vista o conceito de estratigrafia do abandono. A pesquisa foi realizada em instituições arquivísticas e através de entrevistas com profissionais ligados ao Projeto de Salvamento Arqueológico da UHE Balbina (SAUHEB). Com isso, apresentamos como ocorreu o processo de esquecimento de um conjunto de fontes arqueológicas, circunscritas no terreno das memórias exiladas, e ressignificadas a partir das ações patrimoniais contemporâneas.

The copper ore deposit situated in the south-west of Poland is mined by three underground mines owned by KGHM Polish Copper JSC. Exploitation has been accompanied by rock burst hazard since the beginning. Thus, numerous different preventing measures have been developed such as temporary, organizational and long-term ones. However, no one has been able to predict the time, place and energy of a seismic event. The group winning blasting, with maximum number of blasted faces, is the most effective operation to reduce seismic threat. The more faces are blasted the more seismic energy should be reduced. The study aims at assessing the blasting effectiveness in inducing rock bursts and tremors. For this purpose, the seismic activity induced by mining and blasting were investigated. The number of blasting works and blasted faces as well as length of time between subsequent blasting works were analysed and related to provocation effectiveness. The linear correlation and different regressions were calculated to determine these relations. Moreover, the seismic energy reduction in the rock mass was evaluated by means of SRMS Index, which is a factor measured directly before and after blasting. The analyses covered one mine panel in the Polkowice-Sieroszowice copper mine over four-year period.

In traditional university teaching and learning settings feedback to students' performance is often neglected even though it is known to be an important factor to improve learning outcomes. Therefore we placed strong emphasis on this topic while developing and implementing the blended learning concept pharma2 into the curriculum of pharmaceutical sciences. pharma2 combines traditional face-to-face teaching with computer-based learning and testing tools. Once implemented, computer-based testing tools allow frequent feedback to large groups of students. However, commercially available systems show limited possibilities for demanding question and assessment types. Thus we developed PharmAskYou and ViLab. PharmAskYou makes e-testing on higher cognitive levels possible and allows immediate and response contingent feedback. ViLab offers the opportunity to practice demanding lab methods online in the form of video sequences and interactive tools. While working through the method step by step the students receive response contingent feedback. Beside the possibilities of these computer-based testing and online feedback forms other assignments, e.g. reports and posters, followed by an individual feedback by the instructor are implemented into the blended learning concept. We consider the continuity of different assignments and constructive feedback important for students' motivation and hence learning progress. Even though developing and operating a didactically adequate feedback system is time-consuming it is worthwhile when students' performance can be improved as shown in our setting.