Inaug.-diss.--Berlin. / Lebenslauf. "Mit genehmigung der hohen fakultät kommt hier nur ein teil der ganzen arbeit zum abdruck." "Verzeiehnis der fertiggestellten werke Picos": p. [7].

Inaug.-diss.--Berlin. / Lebenslauf. "Mit genehmigung der hohen fakultät kommt hier nur ein teil der ganzen arbeit zum abdruck." "Verzeiehnis der fertiggestellten werke Picos": p. [7].

Diss.--München--Ludwig-Maximilians-Universität, [1995?]. / Bibliogr. p. 489-511.

Rural areas of Cameroon have limited to no availability of grid-supplied electricity, however many locations have significant hydro potential. Pico hydro (less than 5 kW generation capacity) has been identified as a promising means for rural electrification. Tests of previously implemented designs and field research in Cameroon were conducted to contextualize the design process. Field research involved end-user and artisan interviews, market research, site investigations, and artisan collaboration. Findings were used to select an axial flow propeller for the improved turbine. Detailed design used turbomachinery theory towards the development of a locally manufactured low head pico hydro turbine for rural electrification. A propeller turbine with complex blade geometries was designed but simplified to incorporate flat blade geometries to better suit the local manufacture capabilities. A prototype turbine was built and tested. The flat blade propeller turbine performed reasonably well, but was unable to achieve desired power generation targets with predefined head and flow rate conditions.

Background and Objectives Smart healthcare systems use technologies such as wearable devices, Internet of Medical Things and mobile internet technologies to dynamically access health information, connect patients to health professionals and health institutions, and to actively manage and respond intelligently to the medical ecosystem's needs. However, smart healthcare systems are affected by many challenges in their implementation and maintenance. Key among these are ensuring the security and privacy of patient health information. To address this challenge, several mitigation measures have been proposed and some have been implemented. Techniques that have been used include data encryption and biometric access. In addition, blockchain is an emerging security technology that is expected to address the security issues due to its distributed and decentralized architecture which is similar to that of smart healthcare systems. This study reviewed articles that identified security requirements and risks, proposed potential solutions, and explained the effectiveness of these solutions in addressing security problems in smart healthcare systems. Methods This review adhered to the Preferred Reporting Items for Systematic Reviews and Meta-analysis (PRISMA) guidelines and was framed using the Problem, Intervention, Comparator, and Outcome (PICO) approach to investigate and analyse the concepts of interest. However, the comparator is not applicable because this review focuses on the security measures available and in this case no comparable solutions were considered since the concept of smart healthcare systems is an emerging one and there are therefore, no existing security solutions that have been used before. The search strategy involved the identification of studies from several databases including the Cumulative Index of Nursing and Allied Health Literature (CINAL), Scopus, PubMed, Web of Science, Medline, Excerpta Medical database (EMBASE), Ebscohost and the Cochrane Library for articles that focused on the security for smart healthcare systems. The selection process involved removing duplicate studies, and excluding studies after reading the titles, abstracts, and full texts. Studies whose records could not be retrieved using a predefined selection criterion for inclusion and exclusion were excluded. The remaining articles were then screened for eligibility. A data extraction form was used to capture details of the screened studies after reading the full text. Of the searched databases, only three yielded results when the search strategy was applied, i.e., Scopus, Web of science and Medline, giving a total of 1742 articles. 436 duplicate studies were removed. Of the remaining articles, 801 were excluded after reading the title, after which 342 after were excluded after reading the abstract, leaving 163, of which 4 studies could not be retrieved. 159 articles were therefore screened for eligibility after reading the full text. Of these, 14 studies were included for detailed review using the formulated research questions and the PICO framework. Each of the 14 included articles presented a description of a smart healthcare system and identified the security requirements, risks and solutions to mitigate the risks. Each article also summarized the effectiveness of the proposed security solution. Results The key security requirements reported were data confidentiality, integrity and availability of data within the system, with authorisation and authentication used to support these key security requirements. The identified security risks include loss of data confidentiality due to eavesdropping in wireless communication mediums, authentication vulnerabilities in user devices and storage servers, data fabrication and message modification attacks during transmission as well as while the data is at rest in databases and other storage devices. The proposed mitigation measures included the use of biometric accessing devices; data encryption for protecting the confidentiality and integrity of data; blockchain technology to address confidentiality, integrity, and availability of data; network slicing techniques to provide isolation of patient health data in 5G mobile systems; and multi-factor authentication when accessing IoT devices, servers, and other components of the smart healthcare systems. The effectiveness of the proposed solutions was demonstrated through their ability to provide a high level of data security in smart healthcare systems. For example, proposed encryption algorithms demonstrated better energy efficiency, and improved operational speed; reduced computational overhead, better scalability, efficiency in data processing, and better ease of deployment. Conclusion This systematic review has shown that the use of blockchain technology, biometrics (fingerprints), data encryption techniques, multifactor authentication and network slicing in the case of 5G smart healthcare systems has the potential to alleviate possible security risks in smart healthcare systems. The benefits of these solutions include a high level of security and privacy for Electronic Health Records (EHRs) systems; improved speed of data transaction without the need for a decentralized third party, enabled by the use of blockchain. However, the proposed solutions do not address data protection in cases where an intruder has already accessed the system. This may be potential avenues for further research and inquiry.

International Telemetering Conference Proceedings / October 21, 2002 / Town & Country Hotel and Conference Center, San Diego, California / A telemetry system has been developed at the University of Arizona to serve as a baseline for future CubeSat designs. Two satellites are scheduled for launch in November of 2002. One features a beacon that operates autonomously of all but the power system and can independently deploy the antennas. The other will test the performance of new semiconductor devices in low earth orbit. Sensors will monitor voltages, currents (from which attitude and tumble rate can be derived), received signal strength and a distribution of temperatures. The CubeSat’s architecture, operating system, sensors, telemetry format and link budget are discussed.

Orientador: Vicente Afonso Ventrella / Resumo: A evolução do processo de furação nos trouxe ao desenvolvimento do método de furação por laser pulsado, mas não temos definido o que a variação de cada parâmetro produz nos microfuros em relação à qualidade dos mesmos medidos com base em seu formato em aço inoxidável austenítico AISI 316L. O presente estudo analisou como variações na potência de pico, largura temporal do pulso e existência ou não de atmosfera protetora podem mudar os tamanhos, formatos e profundidades em microfuros. Produziram-se combinações dos parâmetros que foram usadas para obter furos em chapas de aço AISI 316L com 1 mm de espessura com o uso de uma fonte de laser pulsado Nd:YAG e analisar as propriedades em cada combinação, tais como diâmetros de entrada e de saída, profundidades e formatos observados em estereoscópio. / Mestre

This ethnography traces my journey teaching kindergarten in the Pico Union neighborhood in Los Angeles. Its purpose is to understand the macro and micro levels of the community to inform my teaching practices and support my students and families. On a micro-level, I conducted case studies on three specific students. Data analysis of in-home interviews, personal interactions, and assessments allowed me to create action plans to best support these students’ academic, social, and emotional needs. On a macro level, I studied my students’ environments: community, school, and classroom. Attending community events, learning about my school’s mission, and reflecting on my classroom culture and expectations, I internalized how students’ environments plays a role in their education. By analyzing whole class and individual student data and reflecting on my own development, I grew as a professional educator and became an effective and socially just teacher.

Köln, Univ., Diss., 2009

SILVA, Edivam José da. Caracterização hidrogeológica de bacias hidrográficas do semiárido baiano através de técnicas de geoprocessamento. 2009. 154 f. Dissertação (Mestrado em engenharia agrícola)- Universidade Federal do Ceará, Fortaleza-CE, 2009. / Submitted by Elineudson Ribeiro (elineudsonr@gmail.com) on 2016-06-17T18:15:02Z No. of bitstreams: 1 2009_dis_ejsilva.pdf: 5998431 bytes, checksum: c32a63b48bb499629a3c3ad3b9d04e47 (MD5) / Approved for entry into archive by José Jairo Viana de Sousa (jairo@ufc.br) on 2016-07-21T20:09:43Z (GMT) No. of bitstreams: 1 2009_dis_ejsilva.pdf: 5998431 bytes, checksum: c32a63b48bb499629a3c3ad3b9d04e47 (MD5) / Made available in DSpace on 2016-07-21T20:09:43Z (GMT). No. of bitstreams: 1 2009_dis_ejsilva.pdf: 5998431 bytes, checksum: c32a63b48bb499629a3c3ad3b9d04e47 (MD5) Previous issue date: 2009 / For the adoption of water resources management in dry regions where water availability is limited, knowledge of the different processes of the hydrological cycle is needed, especially the precipitation and flow. Therefore, techniques of GIS are essential in studies of hydrological modeling. The study on maximum flow in a watershed is important because the same act on soil erosion, flooding in urban and rural areas, hydraulic works, among others. The Salitre basin is located in the State of Bahia, Brazil, and its Pacui sub-basin is fully inserted in the Campo Formoso municipio. With a drainage area of 987.74 km2, it is one of the main drainage sub-basin of Salitre river. Hence, the objective of this work was to characterize physiographically the Pacui sub-basin, estimate peak flow by USDA-SCS and Dooge methods, and estimate the hourly evapotranspiration in the sub-basin using the algorithm SEBAL (Surface Energy Balance Algorithms for Land) and images from Landsat 7 - ETM. The Global Mapper software was used for the analysis of land numerical model (SRTM). The ENVI 4.3 software was used for georeferencing of data from topographic maps of SUDENE, and the Arcmap 9.2 software was used for watershed delineation. The time of concentration was determined by USDA and Dooge methods. To determine the radiation balance images from the INPE (National Institute for Space Research) were used and processed by Arcmap ® software, within algorithm SEBAL was developed. The basin presented low slope and then tends to reduce the flood peak because of the low speed runoff. ArcHidro proved to be an effective tool in the delineation of river basins and the generation of drainage network and compared with those obtained by maps from SUDENE. The algorithm SEBAL proved to be an agile and efficient tool in evapotranspiration estimation. The use of SRTM provided information of parameters as surface albedo, incident long-wave and shortwave radiations, pixel to pixel. Lower rates of hourly evapotranspiration (<0.15 mm.h-1) were recorded in areas of exposed soils, and higher rates were found in irrigated areas and vegetation, expressing the sensitivity of algorithm SEBAL on evapotranspiration estimation in watershed scale. / Para a adoção de uma gestão adequada dos recursos hídricos tendo como unidade de planejamento a bacia hidrográfica, o conhecimento dos diferentes processos do ciclo hidrológico se faz necessário, notadamente da precipitação, do escoamento e da evapotranspiração. Portanto, técnicas de geoprocessamento são imprescindíveis nos estudos de modelagem hidrológica a nível de bacias hidrográficas. O estudo sobre o escoamento superficial, em uma bacia hidrográfica é importante pelo fato do mesmo atuar sobre a erosão do solo, inundações em áreas rurais e urbanas, obras hidráulicas, entre outros. A bacia do rio Salitre esta localizada no Estado da Bahia, e a sub-bacia do rio Pacui esta inserida totalmente no município de Campo Formoso, com área de drenagem de 987,74 km2, constituindo umas das principais subbacias de drenagem para o rio Salitre. Nesse contexto, objetivou-se caracterizar fisiograficamente a sub-bacia rio Pacui e bacia do rio Salitre, analisar a estimativa de vazão de pico pelos métodos de SCS-USDA e de Dooge, e estimar a evapotranspiração horária na bacia do rio Pacui utilizando-se o algoritmo SEBAL (Surface Energy Balance Algorithms for Land) e imagens do Landsat 7 – ETM. Utilizou-se os softwares Global Mapper, para análises do modelo numérico do terreno (SRTM), ENVI 4.3, para georeferenciamento dos dados tendo como base as cartas topográficas da SUDENE e do software ArcMap 9.2 para delimitação automática de bacias. O tempo de concentração foi determinado pelos métodos USDA e de Dooge. Para determinar o balanço de radiação utilizou-se de imagem da região obtida junto ao INPE (Instituto Nacional de Pesquisas Espaciais) e processadas na ferramenta álgebra de mapa no software ArcMap® onde foi desenvolvido o algoritmo SEBAL. A bacia apresenta baixa declividade, portanto tende a uma redução dos picos de descargas devido à baixa velocidade de escoamento superficial. A extensão ArcHidro mostrou-se uma ferramenta eficaz na delimitação de bacias e na geração de rede drenagem, comparando com as obtidas pelas cartas da DSG/SUDENE. O algoritmo SEBAL mostrou-se uma ferramenta ágil e eficiente na estimativa da evapotranspiração. A utilização do SRTM proporcionou ganhos de informações nos parâmetros albedo da superfície, radiação de ondas longas incidente, radiação de onda curtas incidente, pixel a pixel. Menores taxas de evapotranspiração horária (< 0,15 mm.h-1) foram registradas em áreas de solos expostos e as maiores nas áreas irrigadas e vegetação no geral, expressando a sensibilidade do algoritmo SEBAL na estimativa da evapotranspiração em escala de bacias hidrográficas.