604 research outputs found

    Continual variations in the high energy X-ray flux from Sco X-1

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    Balloon X ray observations of intensity fluctuations in Sco X-

    Leveraging Program Analysis to Reduce User-Perceived Latency in Mobile Applications

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    Reducing network latency in mobile applications is an effective way of improving the mobile user experience and has tangible economic benefits. This paper presents PALOMA, a novel client-centric technique for reducing the network latency by prefetching HTTP requests in Android apps. Our work leverages string analysis and callback control-flow analysis to automatically instrument apps using PALOMA's rigorous formulation of scenarios that address "what" and "when" to prefetch. PALOMA has been shown to incur significant runtime savings (several hundred milliseconds per prefetchable HTTP request), both when applied on a reusable evaluation benchmark we have developed and on real applicationsComment: ICSE 201

    Photovoltaic Energy to Face an Earthquake

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    The application of photovoltaic technology is necessary to reduce the harmful effects of an intense earthquake in the city of Portoviejo. It is based on the information obtained about the occurrence of the earthquake on April 16 and considering data from other events of the same nature occurred in the territory, an assessment of the seismic risk for the city and by characterization of one of the zones is made subject to danger, the introduction of photovoltaic luminaires is proposed in order to provide certain strengths that can facilitate the work of the first urgency in the rescue and urgent repair of breakdowns, as well as the evacuation of the population to safer areas especially at night. An analysis is made of the technological structure of photovoltaic luminaires and the prices they have in the market, both internally and Internationally

    The Future of Micro-grids in Ecuador

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    An analysis is made on the development of power lines worldwide and that offer the approaches of the impacts that are generated in the economic and environmental, which justify the application of smart grids in Ecuador, as an effective way to raise the efficiency of the electric power service and to achieve a more efficient use of the energy that is generated by showing the different technologies used in electricity generation where renewable energy sources are incorporated. A comparative analysis of how the installed generation power has been increasing until 2016 is shown

    Understanding How Components of Organisations Contribute to Attacks

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    Attacks on organisations today explore many different layers, including buildings infrastructure, IT infrastructure, and human factor – the physical, virtual, and social layer. Identifying possible attacks, understanding their impact, and attributing their origin and contributing factors is difficult. Recently, system models have been used for automatically identifying possible attacks on the modelled organisation. The generated attacks consider all three layers, making the contribution of building infrastructure, computer infrastructure, and humans (insiders and outsiders) explicit. However, this contribution is only visible in the attack trees as part of the performed steps; it cannot be mapped back to the model directly since the actions usually involve several elements (attacker and targeted actor or asset). Especially for large attack trees, understanding the relations between several model components quickly results in a large quantity of interrelations, which are hard to grasp. In this work we present several approaches for visualising attributes of attacks such as likelihood of success, impact, and required time or skill level. The resulting visualisations provide a link between attacks on an organisations and the contribution of parts of an organisation to the attack and its impact

    Anarchism, individualism and communism: William Morris's critique of anarcho-communism

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    This collection of essays, showing how the boundaries between Marxism and anarchism have been more porous and fruitful than is conventionally recognised, charts a history of radical socialist collaborations from the late 19th ..

    State business: gender, sex and marriage in Tajikistan

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    This article examines the relation of the state to masculinity and sexuality by way of an exploration of the sexual problems of a young man and his wife in Tajikistan at the end of the Soviet era. It suggests that the regime’s inattention to this kind of issue was bound up with the importance to the state of projecting appropriate versions of masculinity. It further posits the idea that the continued refusal of the independent Tajik state to offer appropriate treatments for sexual dysfunction is consistent with the image of modernity President Rahmon wishes to present to the world. The article shows that as masculinity discursively occupies the superior gender position, with men expected to dominate, the state is itself impotent to respond when they are, in fact, unable to do so in sexual practice. However, the myth of male dominance persists to the point that it may prevent women from seeing beyond their subordination and finding mutually beneficial solutions in their familial and sexual relationships

    The Erotic and the Vulgar: Visual Culture and Organized Labor's Critique of U.S. Hegemony in Occupied Japan

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    This essay engages the colonial legacy of postwar Japan by arguing that the political cartoons produced as part of the postwar Japanese labor movement’s critique of U.S. cultural hegemony illustrate how gendered discourses underpinned, and sometimes undermined, the ideologies formally represented by visual artists and the organizations that funded them. A significant component of organized labor’s propaganda rested on a corpus of visual media that depicted women as icons of Japanese national culture. Japan’s most militant labor unions were propagating anti-imperialist discourses that invoked an engendered/endangered nation that accentuated the importance of union roles for men by subordinating, then eliminating, union roles for women

    Antimicrobial resistance and genotyping of Salmonella Typhimurium strains isolated from guinea pigs (Cavia porcellus) from intensive production farms of the city of Lima, Peru

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    El objetivo del estudio fue caracterizar 20 cepas de Salmonella enterica a nivel molecular y de resistencia antimicrobiana. De estas, 15 fueron obtenidas de cuyes infectados y cinco de cuyes clínicamente sanos, procedentes de dos centros de producción intensiva ubicados en Lima, Perú. Mediante una técnica de PCR múltiple se detectaron los genes invA, prot6E y fliC, correspondientes al género Salmonella y serovares Enteritidis y Typhimurium, respectivamente. Se detectó la variabilidad genética mediante la técnica BOX-PCR utilizando el primer BOXA1R. La resistencia fue evaluada utilizando la técnica de Kirby Bauer en base a eritromicina, nitrofurantoína, estreptomicina, penicilina, enrofloxacina, fosfomicina, amoxicilina con ácido clavulánico, sulfatrimetoprim y ciprofloxacina. Se determinó la serovariedad Typhimurium en el 100% de los aislados. La evaluación de los perfiles electroforéticos obtenidos por la técnica de BOX-PCR demostró alta homogeneidad, con patrones de bandas de ADN similares. Se detectaron cepas resistentes a eritromicina 60% (12/20), nitrofurantoína 40% (8/20), estreptomicina 30% (6/ 20), penicilina 25% (5/20), y enrofloxacina 10% (2/20). La detección de cepas resistentes puede ocasionar problemas en el tratamiento de salmonelosis en cuyes y la presencia de un solo grupo genético sugiere una dispersión clonal.The aim of this study was to characterize 20 strains of Salmonella enterica at molecular level and antimicrobial resistance. Of these, 15 strains were obtained from infected guinea pigs and five from clinically healthy guinea pigs from two intensive production centers located in Lima, Peru. The invA, prot6E and fliC genes corresponding to the genus Salmonella and serovars Enteritidis and Typhimurium, respectively, were detected by a multiple PCR technique. Genetic variability was detected using the BOX-PCR technique using the first BOXA1R. Resistance was evaluated using the Kirby Bauer technique based on erythromycin, nitrofurantoin, streptomycin, penicillin, enrofloxacin, fosfomycin, amoxicillin with clavulanic acid, sulfatrimetoprim and ciprofloxacin. Serotype Typhimurium was determined in 100% of the isolates. The evaluation of the electrophoretic profiles obtained by the BOX-PCR technique demonstrated high homogeneity, with similar DNA bands patterns. Strains resistant to erythromycin 60% (12/20), nitrofurantoin 40% (8/20), streptomycin 30% (6/20), penicillin 25% (5/20), and enrofloxacin 10% (2/20) were detected. The detection of resistant strains may cause problems in the treatment of salmonellosis in guinea pigs and the presence of only a genetic group suggests a clonal dispersion
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