Techniques for effective and efficient fire detection from social media images

Social media could provide valuable information to support decision making in crisis management, such as in accidents, explosions and fires. However, much of the data from social media are images, which are uploaded in a rate that makes it impossible for human beings to analyze them. Despite the many works on image analysis, there are no fire detection studies on social media. To fill this gap, we propose the use and evaluation of a broad set of content-based image retrieval and classification techniques for fire detection. Our main contributions are: (i) the development of the Fast-Fire Detection method (FFDnR), which combines feature extractor and evaluation functions to support instance-based learning, (ii) the construction of an annotated set of images with ground-truth depicting fire occurrences -- the FlickrFire dataset, and (iii) the evaluation of 36 efficient image descriptors for fire detection. Using real data from Flickr, our results showed that FFDnR was able to achieve a precision for fire detection comparable to that of human annotators. Therefore, our work shall provide a solid basis for further developments on monitoring images from social media.Comment: 12 pages, Proceedings of the International Conference on Enterprise Information Systems. Specifically: Marcos Bedo, Gustavo Blanco, Willian Oliveira, Mirela Cazzolato, Alceu Costa, Jose Rodrigues, Agma Traina, Caetano Traina, 2015, Techniques for effective and efficient fire detection from social media images, ICEIS, 34-4

Empresas Maquiladoras no México: Reflexos para a Mão de Obra Feminina

Presentes no México desde 1964, as maquilas apresentaram-se para o Estado latino-americano como uma alternativa para superar os altos índices de desemprego gerados após o fim do Programa de Braceros e promover o desenvolvimento da região fronteiriça norte do país. Entretanto, o setor maquilero apresentou, ao longo dos anos, uma crescente e alarmante precarização do trabalho, o que acarretou em prejuízos físico-sociais para todos os trabalhadores desta indústria e, em especial, para as mulheres, gerando um cenário de adversidade entre os objetivos econômicos do México e as condições trabalhistas oferecidas à sua população

Internal water-relations in soybean under water deficit in field conditions

Plantas de soja (Glycine max) cv. Doko foram submetidas a diferentes períodos de déficit hídrico e de reidratação. Utilizando-se a metodologia da curva pressão-volume obtiveram- se parâmetros comumente utilizados nos estudos das relações hídricas [potencial osmótico no máximo de turgescência (4nT 100) e potencial hídrico no zero de turgescência (kIJb) e potencial hídrico no zero de turgescência (uº)]. Foi também analisada a concentração de prolina foliar. Em um dos tratamentos (após 19 dias de suspensão da irrigação, correspondente a 102 dias após emergência) observou-se redução (valores mais negativos) do Un¹ºº e Uº, indicando a existência do mecanismo de ajustamento osmótico. O acúmulo de prolina parece não estar envolvido nesse mecanismo. Em dois dos tratamentos houve redução da concentração de prolina, em função do déficit hídrico. Observaram- se também variações nos parâmetros das relações hídricas e concentração de prolina entre os tratamentos que não sofreram indução de déficit hídrico, nas diferentes épocas de amostragem.Soybean plants (Glycine max) cv. Doko were subjected to different soil drying cycles and rewetting. Using the pressure-volume curve method, the osmotic potential at full turgor (4,7 l 00) and water potential at zero turgor (4,0) were measured. The leaf concentration of proline was also analysed. In one of the treatments (19 days without irrigation, wich corresponds to 102 days after emergence) there was a decrease in 4,ir10° and 4,0, indicating the occurrence of osmotic adjustment. The proline accumulation does not seem to participate in this mechanism. In two of the treatments a decrease of it's concentration in response to water deficit was found. On the other hand, variations among tjnr"°, 4,0 and proline concentration between the treatments that were not subjected to a soil drying cycle at different sampling dates were observe

Intervenção humana nos processos de composição algorítmica: estratégias de controlo sobre o indeterminismo

Esta tese aborda estratégias composicionais centradas na formalização de processos musicais que envolvam o indeterminismo em vários graus. Partindo da definição de algoritmo e composição algorítmica, é efectuado um resumo histórico da utilização de processos formais na música, com vista a poder formular um sistema composicional personalizado. Este sistema é definido pelo processo interactivo entre compositor, instrumentista e programador musical, que criam assim uma ligação flexível. A flexibilidade desta ligação, expressa musicalmente por obras que possuem características adaptativas a tempos e espaços distintos, é conseguida através da interferência humana, em pontos distintos e em diferentes graus, ao longo do processo de criação musical.This thesis addresses compositional strategies focused on formalizing musical processes involving indeterminism in varying degrees. Starting from the definition of algorithm and algorithmic composition, it is made a historical overview of the use of formal procedures in music in order to be able to formulate a compositional system customized. The system is defined by the interactive process between composer, performer and programmer, thus creating a flexible bond. The flexibility of this connection, expressed musically by the works that have adaptive features to different times and spaces, is achieved through human interference at different points and in different degrees, throughout the process of musical creation

Immobilization of alpha acetolactate decarboxylase in hybrid gelatin/alginate support for application to reduce diacetyl off-flavor in beer

Beer production is the largest among alcoholic beverages. Its production process is complex and demands several steps. Lager beers commonly present an off-flavor of butter that is due to the presence of diacetyl, and to avoid such a problem, a long period of maturation (3–5 weeks) is required. Another way is the application of (α-acetolactate decarboxylase) ALDC to accelerate the process. The objectives of the present work were to develop a low-cost support using gelatin, a residue from capsules from the nutraceutical industry, to immobilize the ALDC enzyme. For this, the yield, efficiency and activity recovered, and the stability of free and immobilized enzymes at different temperatures and pH were evaluated. To evaluate the capacity of immobilized enzymes when applied directly to beer and their operational stability, three concentrations of glutaraldehyde (1%, 2.5% and 5%) were tested in distilled water as a cross-linking agent. The best results obtained were 95.6%, 27.0% and 23.6%, respectively, for yield, efficiency and activity recovery. Immobilization provided a high activity over a wide pH range. The immobilized enzyme showed greater stability at temperatures of 50 and 60 ◦C. The immobilized derivative showed adequate reuse capacity, and its dehydrated form had excellent activity after long periods of storage