International Telemetering Conference Proceedings / October 23-26, 2000 / Town & Country Hotel and Conference Center, San Diego, California / The telemetry industry must take advantage of the constantly increasing capability and decreasing per unit costs of network technology. The most effective way to do this is to adopt the layered reference model approach that is being used throughout the telecommunications industry. With a layered reference model, the interfaces between the layers are defined. As a layer is changed, the new layer must adhere to the same interfaces as the previous one. This approach easily allows new technology insertion in key areas without affecting the rest of the system. The Navy and the Air Force see this approach as a key component of acquisition reform and have established a comprehensive road map to achieve this goal.

International Telemetering Conference Proceedings / October 17-20, 1994 / Town & Country Hotel and Conference Center, San Diego, California / A comprehensive examination of the market demands for cost reduced satellite telemetry & control stations will be presented. These systems are implemented using flexible, open architecture-based high performance real-time systems. The trend for combining telemetry monitoring of satellite data with closed-loop satellite command and control functions will be presented. This combined functionality opens up the possibilities for completely integrated, reduced cost satellite control systems. The market forces driving the demand for this integrated functionality include the broadening of non-military satellite applications, the widening international deployment of commercial satellites and the accompanying drive toward decentralized satellite control. The major requirements for the telemetry processing and command & control functionality of the integrated, reduced cost satellite control system will be presented. These requirements include: full real-time performance for processing telemetry data; flexible architecture for the incorporation of a wide range of I/O devices; capability of performing real-time, closed-loop control based on conditions in the telemetry data; user friendly development environments for application-specific customization of the system; and low system costs with the capability of indigenous support. The divergent requirements of performance, flexibility and price of these integrated, reduced cost satellite control systems is made possible via the use of open architecture building blocks that include standard VME boards combined with specialized real-time software drivers and user oriented, flexible Graphical User Interface (GUI) software.

International Telemetering Conference Proceedings / October 21, 2002 / Town & Country Hotel and Conference Center, San Diego, California / There are many network standards in the commercial market today. The layered concept works so well, a developer can implement exactly the capability they desire through careful selection of standards and protocols. This brings up an interesting question of where we draw the line between standardizing on a single implementation and allowing the flexibility of all there is to offer? There are valid arguments for both sides. The telemetry community cannot afford to let this question fall through the cracks. We have the chance to identify what we need to do and how we should do it for both the specific application and the overall system.

Main purpose of this thesis work is to design a comprehensive and open security architecture whose desired parts could be realized on a general-purpose embedded computer without any special cryptography hardware. The architecture provides security mechanisms that implement known cryptography techniques, operations of some famous network security protocols and appropriate system security methods. Consequently, a server machine may offload a substantial part of its security processing tasks to an embedded computer realizing the architecture. The mechanisms provided can be accessed by a server machine using a client-side API and via a secure protocol which provides message integrity and peer authentication. To demonstrate the practicability of the security architecture, a set of its security mechanisms was realized on an embedded PC/104-plus computer. A server machine was connected to and requested mechanisms from the embedded computer over the Ethernet network interface. Four types of performance parameters were measured. They are / number of executions of a symmetric encryption method by the embedded computer per second, number of executions of a public-key signing method by the embedded computer per second, footprint of the implementation on the embedded computer memory, and the embedded computer CPU power utilized by the implementation. Apart from various security mechanisms and the secure protocol via which they can be accessed, the architecture defines a reliable software-based method for protection and storage of secret information belonging to clients.

This study titled School Model of Norrberga- a New Model of School. Some opinions that six pupils in the sixth grade have of their school is an explorative study. The purpose of this study is to some extent explain the ideas behind this quite spectacular model of school and the intentions of the City Council of Norrberga as they decided that all the schools that were to be renovated or built in the town of Norrberga had to follow a specific script.    As I first visited The Moonlight School I was puzzled. How do the teachers work it out? But, above all: Do the pupils work it out? What do they think about their school? When I was to write my final essay I wanted to try to sort this school out in more scientific terms.  There is a nice, warm atmosphere at the school and the pupils make good results. The school has an open architecture and there are seven classes with 60 pupils each and three teachers per class. Pupils and teachers work together in various work units in different areas of the school. In this newly built school with hardly any inside walls, or walls made of glass, the pupils in the sixth grade experience new ways of teaching. In order to find out how these pupils, having experienced both the old Moonlight School and the new model, looked upon their new school I wanted to perform individual interviews with some of them. I also visited the school a couple of days to observe the atmosphere and how they organised the day.  While analysing the collected material trying to describe the school I found support in the theories of Michel Foucault and John Dewey as well as scientific reports about school buildings and history of schooling. I selected those I found most significant for this study.  I found that the pupils mainly are satisfied with their school. Those having experienced all their schooling there do not have problem with the lack of not transparent walls nor with people and transports passing through the spacious educational area.  The community wanted to build smaller schools with more efficient use of the facilities. There is also an intention of developing new ways of teaching better adapted to current teaching methods and curriculum.

Este documento trata da especificação de uma arquitetura aberta para controle de robôs manipuladores. A arquitetura é implementada utilizando o framework do projeto OROCOS, ambiente que já foi utilizado com sucesso em alguns sistemas de controle de robôs. Esta arquitetura é especificada para um robô manipulador genérico de N juntas, definindo componentes que abstraem o hardware dos robôs. A arquitetura é implementada com três tipos de controladores diferentes: PID independente por junta, controlador de torque calculado e controlador com feedforward. A sua validação é feita através da sua implementação em um robô real. Para isso é utilizada uma placa de acionamento, utilizando o barramento CAN devido ao seu determinismo e a sua taxa de comunicação. Também é necessário a utilização do modelo dinâmico do robô para as estratégias de controle de torque calculado e com feedforward. A obtenção de tal modelo é feita neste trabalho de forma analítica, e a seguir os parâmetros são identificados usando o sistema proposto. / This work deals with the specification of an open architecture for control of manipulator robots. The architecture is implemented by using the OROCOS framework. The architecture is specified for a generic manipulator robot with N joints, through definition of components which abstract the hardware of the robot. Three different controllers are implemented: an independent PID for each joint, a computed torque controller and a controller with feedforward. The validation is made through the implementation on the Janus robot. For this purpose, an actuator card is defined. This card uses the CAN bus due its determinism and bus rate. The dynamic model of Janus, used in computed torque and feedforward controllers, is obtained in an analytical way. After that, the parameters of this model are identified using the least squares method.

Este documento trata da especificação de uma arquitetura aberta para controle de robôs manipuladores. A arquitetura é implementada utilizando o framework do projeto OROCOS, ambiente que já foi utilizado com sucesso em alguns sistemas de controle de robôs. Esta arquitetura é especificada para um robô manipulador genérico de N juntas, definindo componentes que abstraem o hardware dos robôs. A arquitetura é implementada com três tipos de controladores diferentes: PID independente por junta, controlador de torque calculado e controlador com feedforward. A sua validação é feita através da sua implementação em um robô real. Para isso é utilizada uma placa de acionamento, utilizando o barramento CAN devido ao seu determinismo e a sua taxa de comunicação. Também é necessário a utilização do modelo dinâmico do robô para as estratégias de controle de torque calculado e com feedforward. A obtenção de tal modelo é feita neste trabalho de forma analítica, e a seguir os parâmetros são identificados usando o sistema proposto. / This work deals with the specification of an open architecture for control of manipulator robots. The architecture is implemented by using the OROCOS framework. The architecture is specified for a generic manipulator robot with N joints, through definition of components which abstract the hardware of the robot. Three different controllers are implemented: an independent PID for each joint, a computed torque controller and a controller with feedforward. The validation is made through the implementation on the Janus robot. For this purpose, an actuator card is defined. This card uses the CAN bus due its determinism and bus rate. The dynamic model of Janus, used in computed torque and feedforward controllers, is obtained in an analytical way. After that, the parameters of this model are identified using the least squares method.

Este documento trata da especificação de uma arquitetura aberta para controle de robôs manipuladores. A arquitetura é implementada utilizando o framework do projeto OROCOS, ambiente que já foi utilizado com sucesso em alguns sistemas de controle de robôs. Esta arquitetura é especificada para um robô manipulador genérico de N juntas, definindo componentes que abstraem o hardware dos robôs. A arquitetura é implementada com três tipos de controladores diferentes: PID independente por junta, controlador de torque calculado e controlador com feedforward. A sua validação é feita através da sua implementação em um robô real. Para isso é utilizada uma placa de acionamento, utilizando o barramento CAN devido ao seu determinismo e a sua taxa de comunicação. Também é necessário a utilização do modelo dinâmico do robô para as estratégias de controle de torque calculado e com feedforward. A obtenção de tal modelo é feita neste trabalho de forma analítica, e a seguir os parâmetros são identificados usando o sistema proposto. / This work deals with the specification of an open architecture for control of manipulator robots. The architecture is implemented by using the OROCOS framework. The architecture is specified for a generic manipulator robot with N joints, through definition of components which abstract the hardware of the robot. Three different controllers are implemented: an independent PID for each joint, a computed torque controller and a controller with feedforward. The validation is made through the implementation on the Janus robot. For this purpose, an actuator card is defined. This card uses the CAN bus due its determinism and bus rate. The dynamic model of Janus, used in computed torque and feedforward controllers, is obtained in an analytical way. After that, the parameters of this model are identified using the least squares method.

Submitted by Renata Lopes (renatasil82@gmail.com) on 2017-11-07T12:44:52Z No. of bitstreams: 1 leandrosimoesdasilva.pdf: 2246306 bytes, checksum: 62b13cb16a4ded100e15966fba624bc5 (MD5) / Approved for entry into archive by Adriana Oliveira (adriana.oliveira@ufjf.edu.br) on 2017-11-09T14:37:32Z (GMT) No. of bitstreams: 1 leandrosimoesdasilva.pdf: 2246306 bytes, checksum: 62b13cb16a4ded100e15966fba624bc5 (MD5) / Made available in DSpace on 2017-11-09T14:37:32Z (GMT). No. of bitstreams: 1 leandrosimoesdasilva.pdf: 2246306 bytes, checksum: 62b13cb16a4ded100e15966fba624bc5 (MD5) Previous issue date: 2017-09-01 / CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / Sistemas de Recomendação podem ser definidos como sistemas capazes de recomendar recursos aderentes ao perfil e contexto do usuário ou grupo de usuários, podendo ser aplicados em diversos domínios, tais como educação, turismo e e-Science. Devido a esta característica adaptável é possível encontrar diversos modelos de recomendação na literatura, cada um com combinações de métodos e algoritmos distintos. Essa variedade de modelos de recomendação pode dificultar o processo de implementação de Sistemas de Recomendação. Neste cenário, a presente dissertação apresenta a arquitetura aberta MMRecommender, onde através da combinação de componentes presentes em cada etapa é possível instanciar modelos de recomendação que podem ser aplicados a diversos domínios. Para avaliar a arquitetura são apresentados três estudos de casos sob perspectivas diferentes: o primeiro estudo de caso foca na adaptação de um Sistema de Recomendação existente para a arquitetura MMRecommender, o segundo estudo de caso implementa um modelo de recomendação criado a partir da arquitetura proposta em um ecossistema de software científico, e, por último, um estudo de caso evidenciando como a arquitetura proposta viabilizou a implementação de um Sistema de Recomendação turístico utilizado nas olimpíadas RIO 2016. Após a avaliação de cada estudo de caso foram obtidos indícios de que a arquitetura proposta pode auxiliar na construção de modelos de recomendação. / Recommender Systems can be defined as systems capable of recommending resources adhering to user or group of user’s profile and context, and can be applied in several domains, such as education, tourism and e-science. Due to this adaptive feature, it is possible to find several recommender models in the literature, each with combinations of different methods and algorithms. This variety of recommendation models can make it difficult to implement Recommender Systems. In this scenario, the present dissertation presents an open architecture MMRecommender, where through the combination of components present in each step it is possible to instantiate recommender models that can be applied to several application domains. To evaluate the architecture, three case studies are presented under different perspectives: the first case study focuses on the adaptation of an existing Recommender System to the MMRecommender architecture, the second case study implements a recommender model created from the proposed architecture in a scientific software ecosystem, and finally a case study evidences how the proposed architecture made possible the implementation of a Tourist Recommender System used in the RIO 2016 Olympic Games. After evaluating each case study it was possible to identify indications that the proposed architecture can help in the construction of recommender models.

International Telemetering Conference Proceedings / October 17-20, 1994 / Town & Country Hotel and Conference Center, San Diego, California / Use of top-down design principles and standard interface techniques provides the basis for a global telemetry data collection, analysis, and satellite control network with a high degree of survivability via use of distributed architecture. Use of Commercial Off-The-Shelf (COTS) hardware and software minimizes costs and provides for easy expansion and adaption to new satellite constellations. Adaptive techniques and low cost multiplexers provide for graceful system wide degradation and flexible data distribution.