Data mining for software engineering and humans in the loop

The field of data mining for software engineering has been growing over the last decade. This field is concerned with the use of data mining to provide useful insights into how to improve software engineering processes and software itself, supporting decision-making. For that, data produced by software engineering processes and products during and after software development are used. Despite promising results, there is frequently a lack of discussion on the role of software engineering practitioners amidst the data mining approaches. This makes adoption of data mining by software engineering practitioners difficult. Moreover, the fact that experts’ knowledge is frequently ignored by data mining approaches, together with the lack of transparency of such approaches, can hinder the acceptability of data mining by software engineering practitioners. To overcome these problems, this position paper provides a discussion of the role of software engineering experts when adopting data mining approaches. It also argues that this role can be extended to increase experts’ involvement in the process of building data mining models. We believe that such extended involvement is not only likely to increase software engineers’ acceptability of the resulting models, but also improve the models themselves. We also provide some recommendations aimed at increasing the success of experts involvement and model acceptability

Conservação pós-colheita de melão Charentais tratado com 1-MCP e armazenado sob refrigeração e atmosfera modificada Postharvest conservation of charentais melons treated with 1-MCP and stored under refrigeration and modified atmosphere

Objetivando avaliar a vida útil pós-colheita de melão tipo Charentais (Cucumis melo L.) sob refrigeração, tratados com 1-MCP e associado ou não a atmosfera modificada (AM), foram conduzidos dois experimentos em laboratório da Embrapa Agroindústria Tropical, Fortaleza-CE. Os frutos foram provenientes da Agroindústria Nolem Comercial Importadora e Exportadora Ltda, localizada no Agropólo Mossoró Açu-RN. Os frutos foram tratados com 300 e 600 ppb de 1-MCP, em seguida, metade desses frutos foram embalados em filmes plásticos, mantendo-se frutos embalados sem aplicação de 1-MCP nas mesmas condições de armazenamento dos demais. Os melões foram armazenados por 21 dias sendo 14 dias (9±1ºC e 87±5% UR) + 7 dias (22±2ºC e 70±5% UR). Em função da aparência externa, a vida útil pós-colheita dos frutos armazenados sob atmosfera modificada, com ou sem tratamento inicial de 1-MCP foi de 21 dias, enquanto que dos frutos tratados inicialmente apenas com 1-MCP foi de 19 dias. A aplicação do 1-MCP proporcionou redução na atividade respiratória e na produção de etileno, e maior retenção da firmeza da polpa, menor perda de massa e melhor aparência externa quando associado a atmosfera modificada. A atmosfera modificada, isoladamente, foi eficiente em reduzir a perda de massa e manter melhor aparência externa.<br>Aiming to evaluate the postharvest shelf life of Charentais melon (Cucumis melo L.) stored under refrigeration, the fruits were treated with 1-MCP, associated or not with modified atmosphere (MAP). Two experiments were carried out at the laboratory of Embrapa Agroindústria Tropical in Fortaleza, Brazil, analyzing the chemical and physic quality characteristics. The fruits were obtained at the Agroindústria Nolem Comercial Importadora e Exportadora Ltda, located in Mossoró Açu, Brazil. The fruits were treated with 300 and 600 nL L-1 of 1-MCP, half of those were wrapped in plastic films, which were wrapped without the use of 1-MCP in the same conditions of storage. The melons were stored during 21 days, being 14 days (9±1ºC and 87±5% UR) + 7 days (22±2ºC and 70±5% UR). Based on external appearance, postharvest shelf life of the fruits stored under modified atmosphere, with or without initial treatment of 1-MCP was 21 days, while in fruits treated initially only with 1- MCP, it was 19 days. The application of the 1-MCP provided reduction in the respiratory activity and ethylene production, and higher flesh firmness retention, smaller weight loss and better external appearance, when associated the modified atmosphere. The modified atmosphere, separately, was efficient to reduce the weight loss and to maintain better external appearance