998 resultados para Sistemas de comunicação óptica
Resumo:
Pós-graduação em Engenharia Elétrica - FEIS
Resumo:
Smart grids are the focus of major study today because of the necessity of modernization in electrical systems and reduction of greenhouse gas emissions that increases global warming. Reaching the best deployment method, you must first of all know the current electrical system and how to use them for the benefit of this new technology. Preparing the action plan we should be aware of the main points of smart grids in each step of the electricity system - generation, transmission and distribution. Analyzed these topics, this work will focus on the first step in the implementation of the smart grids: the smart meters, tool which is already being implemented in Brazil. The main characteristics and applications of these devices, as well as their communication structure with the core distributors will be showed during the paper. Finally, we present a case study which will be discussed and analyzed based in the results obtained with the implementation of smart meters in the city of Vancouver, Canada, where we have a considerable savings already in the first year, with fully paying the initial investment and still have a profit
Resumo:
Wireless communications is a feature that has become indispensable for many people in the whole world. Through this feature, communication process can become much more efficient, allowing people to access information much more quickly wherever they are. The constant evolution of communication technologies allows the development of new unthinkable applications and services. This new range of possibilities brings greater mobility and efficiency for final users and also helps service providers and carriers to improve the quality of services offered by them. This study presents the principles of wireless communication and the Wi-Fi technology as well as its most modern applications, covering from the basics of computer networks to the procedures of planning a wireless network, concepts of radio frequency, antennas, patterns, regulatory agencies, network equipment, protocols and network monitoring
Resumo:
In this paper expounds on the major phases or generations of the evolutionary process of wireless mobile communication, emphasizing their characteristics and changes over time. The main benefit of this process is the rate of data transfer remembering capacity spectral and methods of harnessing and improving its efficiency. The current network today is 4G and the technologies developed over the following requirements of the ITU are: Long Term Evolution Advanced (LTE-Advanced) and WirelessMAN-Advanced as part of the WiMAX IEEE 802.16m also described in this graduate work
Recebimento de dados GNSS via Internet em RTCM 3 e conversão para RINEX utilizando a plataforma J2ME
Resumo:
Changes are occurring worldwide, including the area of positioning using Global Navigation Satellite Systems in mobile devices such as mobile phones or laptops. This is due to the great improvement and availability of Internet services to these mobile devices. The accuracy and speed of data transmission for these devices makes the technology of sending / receiving data via an internet targeted for optimization. The optimization could allow obtaining, in real-time, coordinates (latitude, longitude and altitude) of suitable quality for users of GPS (Global Positioning System) devices that have wireless Internet access, such as those used to control the eet, locomotion, navigation, agriculture, etc. . The use of the protocol NTRIP (Networked Transport of RTCM via Internet Protocol) in GPS applications is growing every day. Applications are available in C, which creates an opportunity for development with a focus on multiplatform environments. In this context, we propose an application, implemented in a multiplatform environment and the use of NTRIP, able to run on a mobile device for receiving GNSS data
Resumo:
Pós-graduação em Engenharia Mecânica - FEG
Resumo:
This paper presents a design and construct the system of data acquisition with wireless transmission of some important parameters like motor temperature, motor rotation and velocity of Unesp Racing´s formula car prototype from Universidade Estadual Paulista, Campus Guaratinguetá. This system development presents a contribution for the electrical technical features adding important points in the competition due car´s electric, in addition, enables preventive maintenance and fine adjustment of the car with the data obtained during training and racing
Resumo:
Pós-graduação em Engenharia Elétrica - FEIS
Resumo:
Didactic texts compose communication and representation systems. By them societies communicate with their children, their youth, transmit them live representations, symbols, ways of understanding speeches and delimit their study fields. This article presents a discussion about the medias used by Portuguese language text books selected by the Ministry of Education Textbook National Program (PNDL – in Portuguese), in order to observe the foundation of actions, movements and media insertion at school. The analysis allows us to see the consolidation of an individualist profile among the strategies of using medias at school, among others aspects.
Resumo:
Pós-graduação em Ciência da Computação - IBILCE
Resumo:
Pós-graduação em Engenharia Elétrica - FEIS
Resumo:
Pós-graduação em Direito - FCHS
Resumo:
This paper presents a study based on bibliographic research on LTE technology, chosen for the fourth generation of mobile phones, and the current status of implementation of 4G network in Brazil. The change in user behavior, which now uses data over the voice services, requires transmission networks to be increasingly robust and fast to enable the viewing of videos and use of other platforms that require internet connection. The retrospective of the development of mobile technologies, from 1G up to 4G that is currently used, shows the long road until it came to appliances and how the phone is used nowadays. Finally, the popularity of smartphones and hence the growing number of people with access to 4G networks, demanded new researchs for the development of future generations technologies in order to achieve the demand for speed enabling significant changes in user experience
Resumo:
This paper presents a study based on bibliographic research on LTE technology, chosen for the fourth generation of mobile phones, and the current status of implementation of 4G network in Brazil. The change in user behavior, which now uses data over the voice services, requires transmission networks to be increasingly robust and fast to enable the viewing of videos and use of other platforms that require internet connection. The retrospective of the development of mobile technologies, from 1G up to 4G that is currently used, shows the long road until it came to appliances and how the phone is used nowadays. Finally, the popularity of smartphones and hence the growing number of people with access to 4G networks, demanded new researchs for the development of future generations technologies in order to achieve the demand for speed enabling significant changes in user experience
Resumo:
Este trabalho objetiva caracterizar o processo comunicativo entre os auxiliares de enfermagem das viaturas de Suporte Básico de Vida do Serviço de Atendimento Móvel de Urgência, a coordenação deste serviço e a Central Única de Regulação Médica de um município do Estado de São Paulo. Trata-se de uma pesquisa descritivo-qualitativa que utilizou a análise temática de conteúdo para a análise dos dados. Usou-se entrevista semi-estruturada para a coleta de dados que foi realizada em janeiro de 2010. Os resultados obtidos mostram dificuldades de comunicação tanto com a Central de Regulação Médica quanto com a coordenação. Os aspectos que mais se destacaram foram as falhas durante a transmissão via rádio, falta de capacitação dos operadores de rádio, acesso à coordenação dificultado e ausência da supervisão dos enfermeiros. No entanto, foi possível detectar soluções que visam à melhoria da comunicação e, consequentemente, do atendimento ofertado pelo Serviço de Atendimento Móvel de Urgência.