Submitted by Divisão de Documentação/BC Biblioteca Central (ddbc@ufam.edu.br) on 2016-02-04T15:29:28Z No. of bitstreams: 1 Dissertação -Roberlânio Melo.pdf: 2220610 bytes, checksum: 853fbfde1f919be543e94f5aedf34482 (MD5) / Approved for entry into archive by Divisão de Documentação/BC Biblioteca Central (ddbc@ufam.edu.br) on 2016-02-04T15:29:51Z (GMT) No. of bitstreams: 1 Dissertação -Roberlânio Melo.pdf: 2220610 bytes, checksum: 853fbfde1f919be543e94f5aedf34482 (MD5) / Approved for entry into archive by Divisão de Documentação/BC Biblioteca Central (ddbc@ufam.edu.br) on 2016-02-04T15:30:07Z (GMT) No. of bitstreams: 1 Dissertação -Roberlânio Melo.pdf: 2220610 bytes, checksum: 853fbfde1f919be543e94f5aedf34482 (MD5) / Made available in DSpace on 2016-02-04T15:30:07Z (GMT). No. of bitstreams: 1 Dissertação -Roberlânio Melo.pdf: 2220610 bytes, checksum: 853fbfde1f919be543e94f5aedf34482 (MD5) Previous issue date: 2012-12-14 / Não informada / This dissertation proposes a method of detecting natural gas leak in oil installations, specifically in onshore oil wells, applying pattern recognition techniques in digital images. Other methods of detecting natural gas leak found in the literature, has as its foundation the analysis of methane molecules, applying the catalytic principle or through the absorption of infrared spectrum. These methods have some disadvantages such as reduced service life and conditions of false negatives, respectively. The method of detecting natural gas leak proposed is based on the application of the concept of novelty filter in digital images originated from CCTV. For this, it was tested six different types of novelty filters. The difference between these filters is in the component type of color spaces (RGB or HIS) used in forming the training base of the respective filter. The best component that characterizes a natural gas leak was determined by performance measuring using ROC curves. The results obtained in the filter of novelty R are promising, with maximum sensitivity and specificity equal to 0,969 and 0,961 respectively, and average AUC of 98.527%. / O presente trabalho propõe um método de detecção de vazamento de gás natural em instalações petrolíferas, especificamente em poços onshore, aplicando técnicas de reconhecimento de padrões em imagens digitais. Outros métodos de detecção de vazamento de gás natural encontrados na literatura, têm como fundamento a análise de moléculas de metano, seja aplicando o princípio catalítico ou através da absorção do espectro infravermelho, estes apresentam algumas desvantagens como vida útil reduzida e condições de falsos negativos, respectivamente. O método de detecção de vazamento de gás natural proposto é baseado na aplicação do conceito de filtro de novidade em imagens digitais oriundas do sistema Closed-Circuit Television. Para tanto foram desenvolvidos seis tipos distintos de filtros de novidade, cuja diferença entre estes filtros está no tipo de componente dos espaços de cores RGB ou HSI utilizado na formação da base de treinamento dos respectivos filtros. A melhor componente que caracteriza um vazamento de gás natural foi determinado pelas medidas de desempenho obtidas nas curvas ROC destes filtros de novidade. Os resultados obtidos no filtro de novidade R são promissores, apresentando especificidade e sensibilidade máxima igual a 96,9% e 96,1%, respectivamente e AUC média de 98,527%.

The problem of this study was to determine if significant differences in scores attained by students on academic achievement, problem-solving, and attitudes were associated with closed-circuit television observations. More specifically, the problem was resolved into seeking solutions to the following! 1. Will college students' academic achievement be extended through television observations of children in classroom situations? 2. Will college students' ability to solve problems be improved through television observations? 3. Will college students' attitudes toward teacher-pupil relationships be affected through television observations?

No description available.

In 1972, an instructional television (lTV) course entitled Clothing and Man was formulated by the Clothing, Textiles and Related Art Department in cooperation with the Learning Resources Center at Virginia Polytechnic Institute and State University. Discussion groups and a course outline were developed to aid students in learning the required subject matter presented by the lTV lectures. Through these components, and others such as the course syllabus, stated objectives, slides, and textbooks, a systems approach to lTV has been developed. As a component part of a system in this form of educational technology, instructional television is more likely to be an efficient tool for learning. lTV has worked best when it was used as an integral part of the learning activities (Chu & Schramm, 1967; Diamond, 1964). An orientation to learning with television lecture (Hutchinson, 1973) was developed specifically for the course to aid students in studying the subject matter. In the present format of the course, the orientation lecture precedes the presentation of the television lectures. / Master of Science

Using Computational Fluid Dynamics Simulations, the flow in the new University of Sydney closed circuit wind tunnel has been analyzed prior to the construction of the tunnel. The objective was to obtain a uniform flow in the test section of the wind tunnel while keeping the pressure losses over the tunnel as low as possible. This was achieved by using several flow-improving components such as guide vanes, screens, a honeycomb and a settling chamber. The guide vanes were used in the corners and in the diverging part leading into the settling chamber, giving a significant improvement of the flow as they prevent it from taking undesired paths. The settling chamber is used to decelerate the flow before it is accelerated when leaving the settling chamber, a process which reduces the turbulence in the flow. Screens were used in the settling chamber to further improve the flow by imposing a pressure drop which evens out differences in the flow speed and reduces the turbulence. The honeycomb, which is situated in the end of the settling chamber, makes the flow more uniform by forcing it to go in only one direction. A uniform flow was obtained using three screens and one honeycomb together with the guide vanes and the settling chamber.

Ball mill grinding is an important operation in the processing of most minerals, in that it may be used to produce particles of the required size and shape, to liberate minerals from each other for concentration purposes, and to increase the powder surface area. Grinding of minerals is probably the most energy consuming task and optimization of this operation has vital importance in processing plant operations to achieve the lowest operating costs. Predicting the complete product size distribution, mill specifications and power draw are important parameters of this optimization. In this study, a computer simulation program is developed in MATLAB environment to simulate grinding operations using the kinetic model in which comminution is considered as a process continuous in time. This type of model is commonly and successfully used for tumbling grinding mills having strongly varying residence time as a function of feed rate. The program developed, GRINDSIM, is capable of simulating a ball mill for a specified set of model parameters, estimating grinding kinetic parameters from experimental batch grinding data and calculating continuous open and closed-circuit grinding behavior with mill power input. The user interacts with the program through graphical user interfaces (GUI&rsquo / s).

No description available.

The researcher attempts to establish how CCTV footage can be used as a surveillance technique, for evidence gained in that way to be admissible in court. To conduct effective investigation, it is important for investigators to be familiar with the application of CCTV footage, its purpose, its benefits and shortfalls. To achieve the goals and objectives of the practice of CCTV footage, investigators must know how to utilise the value of its evidence, and how to use it to identify suspects. The clarification and application to the crime situation, the identification of the perpetrator or suspect of a criminal act is mostly impossible, if CCTV footage is not available to assist in identification and tracing of suspects. / Police Practice / M. Tech. (Forensic Investigation)

This descriptive study utilized semi-structured interviews and observations to examine the experiences of hospitalized school-age children, and explore the potential of a live, closed-circuit television program as a psychosocial intervention. Among findings, Phase I data from 16 subjects indicates a) concern with painful medical procedures, particularly intraveneous (IV) injections, b) a desire for more information, especially concerning medical equipment, c) a variety of responses to social issues among subjects, d) the importance of activities, and e) the central role of the hospital playroom. Phase II data indicates that live, closed-circuit television can provide ambulatory and room-bound children opportunities for making choices, social interaction, participation, and information on their environment. Conclusions and implications are included.

中文摘要 近年來治安問題日益受到重視，錄影監視系統之設置也成為改善治安的重要策略之一，臺北市里長以裝設錄影監視系統作為預防犯罪的重要政見，致里鄰監視器大幅成長甚至達全國之冠。里長無公權力且缺乏維管監視系統之專業力，為解決里辦公處設置之錄影監視系統大幅成長衍生纜線附掛凌亂、維修經費不足及隱私權等問題，臺北市政府決定整合並移轉警察局專業管理。 本研究以網絡政策治理的觀點分析臺北市錄影監視系統建置政策決策，探討里鄰錄影監視系統產生治安與資訊隱私難以兼顧之政策弔詭。個案聚焦於臺北市錄影監視系統之整合過程相關利害關係人意見，期能回顧建置過程相關問題並針對現況缺失提出改進之策。 本研究以立意抽樣的方式選定臺北市錄影監視系統整合期間實務運作者進行深度訪談，並蒐集官方機構有關臺北市錄影監視系統建置相關資料，兼採文獻分析法及個案研究法以取得描述性資料。研究主要目的包含：(1)探討臺北市里長建置管理錄影監視系統產生的問題；(2)探討臺北市錄影監視系統整合政策決策過程；(3)依據研究結果提供建置錄影監視系統相關建議及公部門如何與民力合作改善治安之未來方向。 研究結果如下：(1)人民重視治安甚於隱私；(2)里長沒有公權力不適合管理監視器；(3)里長建置之錄影監視系統機器老舊廠牌規格各異，警察局無法以接收方式整合；(4)新系統設置點位經警察局以治安專業評估，移轉過程難以配合里長一支換一支的期待；(5)利害關係人意見往往沒有那麼客觀；(6)警力有限民力無窮，以中長期而言整合社區資源結合民力協助警力為重要的未來方向。 而針對上述的研究發現，本研究提出三點建議：第一、維護治安應凝聚社區認同；第二、應加強風險管理及危機處理能力；第三、落實民間設置錄影監視系統之管理。 / Abstract Recently, the public security is a significant issue concerned by government. Setting the closed-circuit television (CCTV) system is one of the strategies for improving the public security. Village chiefs in Taipei have an important political view: To set neighborhood CCTV for crime prevention. As the result of that, the number of neighborhood CCTV in Taipei is the top in Taiwan. However, the village chiefs have neither public right nor the specialty for maintain the CCTV system. In order to conquer the problems: messy cables, lack of funds and privacy issues caused from the neighborhood CCTV, the Taipei City Government make a decision to shift the management rights to the police department. From my studies, I analyze the policy of Taipei CCTV and search for the community safety and privacy issues caused by the neighborhood CCTV. My research cases focused on the related-stakeholders’ opinions to the processing of Taipei CCTV integration. As we focus on that, we can propose better policies to improve the problems we have now. I chose purposive sampling as the way to select the workers in Taipei CCTV integration processing to have in-depth interviews. Moreover, I collected some information of Taipei CCTV from government resources and used literature review methodology with case review to have a descriptive research. The main propose of my studies including (1) To investigate the problems from the setting of CCTV by village chiefs. (2) To verify the processing of making Taipei CCTV integration policy. (3) To give some suggestions about how government and citizens work together to improve the community security in the future. Result as below: (1) Citizens thought security is more important than privacy. (2) Village chiefs aren’t suitable to manage the CCTV because they have no public right to do that. (3) It is difficult for police department to integrate the CCTV system because the monitors were old and the brands of CCTV were different. (4) The new CCTV system from police department is difficult to meet the every requirement from village chiefs. (5) The Opinions from related-stakeholders are not quite objective. (6) The number of police is limited. Thus, it is important to combine the citizen and police together to improve the public security. As follows, I have three recommendations. First, we need to agglomerate social identity to maintain the public security. Second, we need to improve the abilities on risk management and crisis handling. Third, we need to manage the setting of CCTV system.