779 research outputs found

    High standard temporary buildings for housing emergency

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    The project proposal consists of modular living systems made with dry technology, temporary, re-usable and energy efficient. The concepts of standardization and modular coordination are applied in order to minimize the production and execution times of the modules. The latter, taken together with the criteria of temporariness, reversibility, flexibility and energy efficiency become basic requirements for the project and allow the achievement of standards, levels of comfort and above all performances comparable to those of sustainable buildings of the latest generation

    EEG correlates of social interaction at distance

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    This study investigated EEG correlates of social interaction at distance between twenty-five pairs of participants who were not connected by any traditional channels of communication. Each session involved the application of 128 stimulations separated by intervals of random duration ranging from 4 to 6 seconds. One of the pair received a one-second stimulation from a light signal produced by an arrangement of red LEDs, and a simultaneous 500 Hz sinusoidal audio signal of the same length. The other member of the pair sat in an isolated sound-proof room, such that any sensory interaction between the pair was impossible. An analysis of the Event-Related Potentials associated with sensory stimulation using traditional averaging methods showed a distinct peak at approximately 300 ms, but only in the EEG activity of subjects who were directly stimulated. However, when a new algorithm was applied to the EEG activity based on the correlation between signals from all active electrodes, a weak but robust response was also detected in the EEG activity of the passive member of the pair, particularly within 9 – 10 Hz in the Alpha range. Using the Bootstrap method and the Monte Carlo emulation, this signal was found to be statistically significant

    Multicolor Licklider Transmission Protocol: An LTP Version for Future Interplanetary Links

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    The Licklider Transport Protocol (LTP) is the "convergence layer" of choice in Interplanetary networks based on Delay-/Disruption-Tolerant architecture. It was designed for long-delay scheduled-intermittent links, offering either a reliable or an unreliable service, with "red" and "green" parts, respectively. The aim of this article is to present multicolor LTP, an LTP version consisting in a series of enhancements of which the most significant are the use of monochrome sessions, the introduction of an additional orange color offering a "notified" service, and the definition of default link colors. After a thorough examination of basic LTP mechanisms for all color variants, this article discusses two scenarios where orange seems particularly appealing: video streaming and optical interplanetary links. Numerical results offer further insight into the complex LTP mechanisms and also highlight the difference between LTP retransmissions and bundle protocol retransmissions, the latter benefitting from routing reprocessing. Multicolor LTP has already been implemented as an interplanetary overlay network (ION) plug-in and its enhancements have been proposed to Consultative Committee for Space Data Systems Space Internetworking Services Delay-/Disruption-Tolerant Networking working group for a possible inclusion in the next version of LTP specifications (LTPv2)

    Pengaruh Kualitas Layanan Perpustakaan Terhadap Pemanfaatan Koleksi di Perpustakaan pada Peserta Didik SMP Negeri 26 Makassar

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    Skripsi ini membahas tentang Pengaruh Kualitas Layanan Perpustakaan tarhadap Pemanfaatan Koleksi di Perpustakaan Oleh Peserta Didik SMP Negeri 26 Makassar. Adapun permasalahan dalam penelitian ini adalah bagaimana kualitas layanan, dan bagaimana pemanfaatan koleksi, dan adakah pengaruh antara kualitas layanan perpustakaan terhadap pemanfaatan koleksi di perpustakaan oleh peserta didik SMP Negeri 26 Makassar. Dalam penelitian ini, penulis menggunakan penelitian deskriptif (pengaruh) dengan pendekatan kuantitatif. Karena dengan penelitian ini, penulis bermaksud ingin mengetahui pengaruh kualitas layanan perpustakaan terhadap pemanfaatan koleksi di perpustakaan pada peserta didik SMP Negeri 26 Makassar. Penulis mengumpulkan data melalui penyebaran kuesioner, observasi dan dokumentasi. Adapun yang menjadi populasi dalam penelitian ini adalah pemustaka di perpustakaan SMP Negeri 26 Makassar rata-rata 3 bulan terakhir terhitung dari bulan April-Mei dan Agustus 2016 sebanyak 244 pengguna. Sedangkan sampel diambil 20% dari populasi yaitu 48 pengguna. Tujuan dari penelitian ini yaitu untuk mengetahui bagaimana kualitas layanan, bagaimana pemanfaatan koleksi dan bagaimana pengaruh antara kualitas layanan terhadap pemanfaatan koleksi di perpustakaan pada peserta didik SMP Negeri 26 Makassar. Dari hasil analisis deskriptif menunjukkan bahwa kualitas layanan perpustakaan SMP Negeri 26 Makassar tergolong dalam kategori baik dengan skor Total 2,094 berada pada rentang skor (1810 - 2100) atau 99,72% artinya Kualitas Layanan adalah baik. Untuk pemanfaatan koleksi SMP Negeri 26 Makassar tergolong dalam kategori kurang baik dengan skor Total 1750, berada pada rentang skor (940– 1780) atau 72,92% artinya pemanfaatan koleksi kurang baik. Pengaruh kualitas layanan perpustakaan terhadap pemanfaatan koleksi di perpustakaan pada peserta didik SMP Negeri 26 Makassar adalah sangat rendah. Dari hasil uji regresi SPSS diperoleh sebesar nilai koefisien korelasi R = 0,148, artinya kualitas layanan memberikan pengaruh yang negatif terhadap pemanfaatan koleksi

    Schedule‐Aware Bundle Routing: Analysis and enhancements

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    The Delay-/Disruption-Tolerant Networking (DTN) architecture was designed to cope with challenges such as long delays and intermittent connectivity. To exploit the a priori knowledge of contacts, typical of space networks, NASA-JPL designed and included in ION (its DTN protocol suite) the Contact Graph Routing (CGR) algorithm. This paper studies the latest version, recently standardized as Schedule-Aware Bundle Routing (SABR) within the Consultative Committee for Space Data Systems (CCSDS). The first part of the paper is devoted to the algorithm analysis, which distinguishes three logical phases to examine sequentially. Following this comprehensive study, three enhancements are proposed, which aim to improve SABR accuracy and resistance against possible loops. They are studied on a simple but challenging DTN topology, implemented on a virtual GNU/Linux testbed. Tests are performed by running the latest version of ION and an independent implementation of SABR developed by the authors, Unibo-CGR. The numerical results are then examined in detail to highlight both SABR mechanisms and the advantages offered by the proposed enhancements

    The impact of influenza and pneumococcal vaccination on antibiotic use:an updated systematic review and meta-analysis

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    BACKGROUND: Vaccination can prevent bacterial and viral infections that could otherwise increase the chances of receiving (unnecessary) antibiotic treatment(s). As a result, vaccination may provide an important public health intervention to control antimicrobial resistance (AMR).OBJECTIVES: Perform a systematic literature review to better understand the impact of influenza, pneumococcal and COVID-19 vaccination on antibiotic use, and to identify differences in effect between world regions and study designs.METHODS: We performed a systematic literature review and meta-analysis which updated previous literature reviews with new data from 1 October 2018 to 1 December 2021. The study focuses on randomised controlled trials (RCTs) and observational studies. Results from the meta-analysis of RCTs were stratified by WHO region and age group. Vote counting based on the direction of effect was applied to synthesize the results of the observational studies.RESULTS: Most studies are performed in the WHO European Region and the Region of the Americas in high-income countries. RCTs show that the effect of influenza vaccination on the number of antibiotic prescriptions or days of antibiotic use (Ratio of Means (RoM) 0.71, 95% CI 0.62-0.83) is stronger compared to the effect of pneumococcal vaccination (RoM 0.92, 95% CI 0.85-1.00). These studies also confirm a reduction in the proportion of people receiving antibiotics after influenza vaccination (Risk Ratio (RR) 0.63, 95% CI 0.51-0.79). The effect of influenza vaccination in the European and American regions ranged from RoM 0.63 and 0.87 to RR 0.70 and 0.66, respectively. The evidence from observational studies supports these findings but presents a less consistent picture. No COVID-19 studies were identified.CONCLUSION: We find that both RCTs and observational studies show that influenza vaccination significantly reduces antibiotic use, while the effect of pneumococcal vaccination is less pronounced. We were unable to study the effect of COVID-19 vaccination and no clear regional patterns were found due to the high heterogeneity between studies. Overall, our data supports the use of influenza vaccination as an important public health intervention to reduce antibiotic use and possibly control AMR.</p

    Research challenges in nanosatellite-DTN networks

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    Current approaches based on classical satellite communications, aimed at bringing Internet connectivity to remote and underdeveloped areas, are too expensive and impractical. Nanosatellites architectures with DTN protocol have been proposed as a cost-effective solution to extend the network access in rural and remote areas. In order to guarantee a good service and a large coverage in rural areas, it is necessary to deploy a good number of nanosatellites; consequentially, for reliability and load balancing purposes, is also needed a large number of ground stations (or hot spots) connected on the Internet. During a data connection, a server on the Internet that wants to reply to the user on rural area, has many hot spot alternatives to whom it can deliver data. Different hot spots can send data to final destination with different delivery delay depending on the number, position and buffer occupancy of satellites with which it comes into contact. The problem of choosing the optimal hot spot becomes important because a wrong choice could lead a high delivery delay
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