Orientadores: Varese Salvador Timóteo, Francisco José Arnold / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Tecnologia / Made available in DSpace on 2018-08-24T09:10:01Z (GMT). No. of bitstreams: 1 CesarioJunior_JoseMaria_M.pdf: 2596300 bytes, checksum: 6b11eb547957a0632bbc647946da04ce (MD5) Previous issue date: 2014 / Resumo: A crescente evolução mundial dos sistemas de medição inteligentes, a liberação de regulamentações Brasileiras, incentivando a adoção de sistemas de medição de energia elétrica inteligentes, direcionaram a presente dissertação a propor um sistema composto de um equipamento eletrônico para medição, em tempo real, das grandezas de corrente, tensão e calcular a energia consumida e terá canais de comunicação com as tecnologias Wi-Fi, GSM/GPRS e GPS. As informações sobre consumo serão disponibilizadas para os usuários finais com o objetivo de mudar o padrão de consumo de energia elétrica, ou até reduzi-lo, através da conscientização e disponibilização das informações de consumo em tempo real / Abstract: The growing worldwide trend of smart metering systems, the release of Brazilian regulations, encouraging the adoption of smart electricity metering systems, guided this dissertation to propose a system composed of an electronic device for measuring, in real time, the magnitudes of current, voltage and calculate the consumed power and will have communication channels based on Wi-Fi, GSM /GPRS and GPS technologies. The consumption information will be made available to end users with the goal of changing the electricity consumption pattern, or even reduce it, through awareness and provision of consumer information in real time / Mestrado / Tecnologia e Inovação / Mestre em Tecnologia

M. Tech. (Department of Process Control and Computer Systems, Faculty of Engineering and Technology), Vaal University of Technology. / The telecommunication and utility cable monitoring system was implemented to protect the cable tampering. Cable tampering occurs despite the fact that methods have been developed, to solve and decrease cable tampering cases such as cable tampering prevention campaigns at the national and international level, organizing security patrols, replacing existing cable with fiber cables and I-Watch system installation. The objective of the research was to design and implement a cable tampering monitoring system which is able to monitor, detect, pinpoint the location and give the distance from the sensor at which the cable tampering took place. The system is an improvement on the traditional cable anti-theft monitoring system, the method of tracking resonance signal frequency was implemented. The system incorporates a sensing circuit which detects a change on the capacitance value of the cable and converts it into an equivalent frequency value, Field-Programable Gate Array (FPGA) board is utilized to convert the frequency into the cable length (the distance from sensor of cable which was taken away), after detecting an anomaly on the cable (tampered with) the output of the system is divided into two parts which are display mode and messaging mode. For display mode, the system uses a Liquid Crystal Display (LCD) which displays the GPS Coordinates of the location where the cable tampering took place and the distance from sensor of the cable which has been tampered with. In the messaging mode, the FPGA activates the GSM module and the module sends alert flag message to the user when the cable is tampered with.

The rapidly growing demand for UWB as high data rates wireless communications technology, since the Federal Communications Commission (FCC) allocated the bandwidth of UWB from 3.1GHz to 10.6 GHz. Antenna also plays an essential role in UWB system. However, there are some difficulties in designing UWB antenna as compared to narrowband antenna. The primary requirement of UWB antennas is be able to operate over frequencies released by the FCC. Moreover, the satisfaction of radiation properties and good time domain performance over the entire frequency range are also necessary. In this thesis, designing and analysing printed crescent shape monopole antenna, Planar Inverted F-L Antenna (PIFLA) and Planar Inverted FF Antenna (PIFFA) are focused. A Planar Inverted FF Antenna (PIFFA) can be created to reduce the potential for interference between a UWB system and other communications protocols by using spiral slot. The antennas exhibits broadside directional pattern. The performances such as return loss, radiation pattern and current distribution of the UWB antennas are extensively investigated and carried out. All the results have been demonstrated using simulation and experimentally whereby all results satisfy the performance under - 10dB point in the bandwidth of UWB. In addition the miniaturization of MIMO/diversity Planar Inverted-F antenna (PIFA) which is suitable for pattern diversity in UWB applications is presented. This antenna assembly is formed by two identical PIFAs, a T-shaped decoupling structure which connects the two PIFAs and a finite ground plane with a total compact envelope dimension of 50 ¿ 90 ¿ 7.5mm3. The radiation performance of the proposed MIMO antenna was quite encouraging and provided an acceptable agreement between the computed and measured envelope correlation coefficient and channel capacity loss. / General Secretariat of Education and Scientific Research Libya

More than one billion people, almost one in six of the world's population, are now using GSM mobile phones. The situation in South Africa is no different from that in the rest of the world. The rise of mobile telephone usage in South Africa has been driven by a combination of factors such as demand, sector reform, the licensing of new competition, and the emergence of major strategic investors, such as Vodacom and MTN. It was estimated that by March 2005 there should be approximately 20 million cellular customers in South Africa. The growth in the South African cellular market is proportionate to the potential risks in an environment where organisations are continuously seeking ways of improving efficiency, cutting costs, and staying abreast of technological advances. Elements of risk control such as Safety, Health, and Environmental Management can no longer be left out of the equation while organisations in the GSM industry are considering increasing their networks to meet the demands of growth. Although risk assessments are not specifically defined in the Occupational Health and Safety Act (85 of 1993); Section 8 does, however, stipulate under the general duties of the employer that the employer must establish, as far as is reasonably practicable, which hazards to the health or safety of persons are attached to any work which is performed. This situation has changed with the promulgation of the Construction Regulations, GNR.1010 on 18 July 2003; which state that every contractor performing construction work shall, before the commencement of any construction work and during construction work, cause a risk assessment to be performed by a competent person appointed in writing, and that the risk assessment shall form part of the health and safety plan to be applied on the site. This requirement under the Construction Regulations will have a major impact on organisations in the GSM industry. Integrated Health, Safety and Environmental risk assessments have now become a prerequisite before considering any further expansion of the GSM network in South Africa. The relationship between the operational risk sub-disciplines of health, safety, and environmental management, as part of the risk-management function, has been established, and an operational risk-assessment model for the Global Systems Mobile Telecommunications industry in South Africa that measures occupational health, safety, and environmental management risks on an integrated basis has been developed. The risk assessment model for the South African GSM industry is based on assessing the frequency of an activity in relation to the impact on the organisation's business processes, incident/accident potential, financial impact, legal status, and the nature of ecological impact. / Business Management / D. Com. (Business Management)

More than one billion people, almost one in six of the world's population, are now using GSM mobile phones. The situation in South Africa is no different from that in the rest of the world. The rise of mobile telephone usage in South Africa has been driven by a combination of factors such as demand, sector reform, the licensing of new competition, and the emergence of major strategic investors, such as Vodacom and MTN. It was estimated that by March 2005 there should be approximately 20 million cellular customers in South Africa. The growth in the South African cellular market is proportionate to the potential risks in an environment where organisations are continuously seeking ways of improving efficiency, cutting costs, and staying abreast of technological advances. Elements of risk control such as Safety, Health, and Environmental Management can no longer be left out of the equation while organisations in the GSM industry are considering increasing their networks to meet the demands of growth. Although risk assessments are not specifically defined in the Occupational Health and Safety Act (85 of 1993); Section 8 does, however, stipulate under the general duties of the employer that the employer must establish, as far as is reasonably practicable, which hazards to the health or safety of persons are attached to any work which is performed. This situation has changed with the promulgation of the Construction Regulations, GNR.1010 on 18 July 2003; which state that every contractor performing construction work shall, before the commencement of any construction work and during construction work, cause a risk assessment to be performed by a competent person appointed in writing, and that the risk assessment shall form part of the health and safety plan to be applied on the site. This requirement under the Construction Regulations will have a major impact on organisations in the GSM industry. Integrated Health, Safety and Environmental risk assessments have now become a prerequisite before considering any further expansion of the GSM network in South Africa. The relationship between the operational risk sub-disciplines of health, safety, and environmental management, as part of the risk-management function, has been established, and an operational risk-assessment model for the Global Systems Mobile Telecommunications industry in South Africa that measures occupational health, safety, and environmental management risks on an integrated basis has been developed. The risk assessment model for the South African GSM industry is based on assessing the frequency of an activity in relation to the impact on the organisation's business processes, incident/accident potential, financial impact, legal status, and the nature of ecological impact. / Business Management / D. Com. (Business Management)

This study aimed to evaluate the effectiveness of a modern fleet management system in improving the logistics of transporting staff, goods and materials in Kenya Power & Lighting Company, a utility firm in power distribution. In today’s competitive marketplace which is characterised by rapidly changing business requirements, leveraging leading edge technologies and adopting best practices are essential in order to ensure sound logistical support that guarantees both effectiveness and efficiency in the transportation processes. The sampling procedure of one-stage, cluster sampling and the use of the simple random sampling technique were used in this study to select a sample size which was sufficiently representative of the whole population. Both the descriptive study approach and the survey research strategy were adopted to enable the collection of data in a manner that allowed in-depth examination while gathering information that explained the relationships between constructs, in particular, cause and effect relationships. The main purpose of this dissertation was therefore to establish that the use of information technology is feasible in transport industries, explain possible obstacles and also any major advantages of its implementation. Secondly, as regards the theoretical aspect, a broadened view on the use of online tracking for vehicles using a global positioning system is presented, together with practical examples, to illustrate its successful implementation in a fleet management system. The study concludes by offering suggestions and recommendations from the research results and the researcher’s experiences for future studies. / Transport Economics, Logistics & Tourism / M. Com. (Transport Economics)

This study aimed to evaluate the effectiveness of a modern fleet management system in improving the logistics of transporting staff, goods and materials in Kenya Power & Lighting Company, a utility firm in power distribution. In today’s competitive marketplace which is characterised by rapidly changing business requirements, leveraging leading edge technologies and adopting best practices are essential in order to ensure sound logistical support that guarantees both effectiveness and efficiency in the transportation processes. The sampling procedure of one-stage, cluster sampling and the use of the simple random sampling technique were used in this study to select a sample size which was sufficiently representative of the whole population. Both the descriptive study approach and the survey research strategy were adopted to enable the collection of data in a manner that allowed in-depth examination while gathering information that explained the relationships between constructs, in particular, cause and effect relationships. The main purpose of this dissertation was therefore to establish that the use of information technology is feasible in transport industries, explain possible obstacles and also any major advantages of its implementation. Secondly, as regards the theoretical aspect, a broadened view on the use of online tracking for vehicles using a global positioning system is presented, together with practical examples, to illustrate its successful implementation in a fleet management system. The study concludes by offering suggestions and recommendations from the research results and the researcher’s experiences for future studies. / Transport Economics, Logistics and Tourism / M. Com. (Transport Economics)