The Experts below are selected from a list of 1710 Experts worldwide ranked by ideXlab platform
Rocha, Igor Pessoa - One of the best experts on this subject based on the ideXlab platform.
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Indexação e referências textuais : um estudo de caso com implementação de ferramenta para o Programa Nacional de Atividades Espaciais
2014Co-Authors: Rocha, Igor PessoaAbstract:O Programa Nacional de Atividades Espaciais (PNAE) é um programa brasileiro de incentivo ao desenvolvimento das atividades espaciais. Ele representa as prioridades de integração da política espacial às demais políticas públicas em execução no Brasil e foi resultado de um seminário realizado por representantes do Governo, de segmentos científicos, acadêmicos e empresariais. Por se tratar de um documento de importância nacional, o relatório do PNAE é um documento disponível a toda sociedade, porém com um vocabulário muito técnico, podendo limitar a compreensão dos leitores leigos da área espacial tais como gestores públicos e a própria sociedade. Tendo em vista esse cenário, este trabalho propõe uma aplicação, batizada de Indexer, que identifica todos os termos técnicos simples e compostos, no domínio da área espacial, do documento do PNAE. Além de identificar os termos técnicos, o Indexer também apresenta os respectivos significados ao leitor no momento em que ele posiciona o ponteiro do Mouse sobre as palavras escolhidas, agregando valor descritivo aos termos e fornecendo informações contextualizadas. Os termos técnicos da área espacial são identificados de acordo com o Dicionário Enciclopédico de Astronomia e Astronáutica, que foi estruturado e preparado para a consulta. O Indexer foi desenvolvido na linguagem Python e possui também a possibilidade de indexar outros documentos da área espacial que estejam disponíveis em formato .html ou .txt. Concluiu-se do trabalho realizado que o objetivo do desenvolvimento do Indexer foi alcançado, isto é, os resultados obtidos proveram ao leitor o enriquecimento do documento do PNAE e de outros documentos da área com informações complementares dos termos técnicos espaciais, diferenciando termos simples de termos compostos o que aumenta a contextualização dos significados. _____________________________________________________________________________ ABSTRACTThe National Program of Spacial Activities (PNAE) is a Brazilian program to encourage the development of spacial activities. The PNAE represents the integration priorities of the spacial policy to other public policies in execution at Brazil. The PNAE was launched by a Government Seminar where scientists, academic and business segments participated. Regarding the national importance of this document, the PNAE report, it is a document available to the whole society. Nevertheless, the PNAE report uses technical vocabulary that limits the understanding of citizens and public managers. Given this scenario, this work proposes an application, named Indexer, which identifies all the technical terms simple and compound, in the field of space research. In addition to identify the technical terms, the Indexer also presents their meanings to the reader by positioning the Mouse Pointer over the words identified, adding descriptive value to the terms and providing contextual information. Technical terms of spatial area are identified according to the Encyclopedic Dictionary of Astronomy and Astronautics, which was structured and prepared for database querying. The Indexer has been developed in Python, and has the possibility of indexing other spatial-related documents that are available in .html or .txt. As a conclusion, the Indexer proposed and developed in this project has provided the reader the enrichment of the Program document and other documents in the spatial area with complementary information of the technical terms, differentiating simple and compound terms which enhances the meanings contextualization
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Indexação e referências textuais : um estudo de caso com implementação de ferramenta para o Programa Nacional de Atividades Espaciais
2014Co-Authors: Rocha, Igor PessoaAbstract:Monografia (graduação)—Universidade de Brasília, Instituto de Ciências Exatas, Departamento de Ciência da Computação, 2014.O Programa Nacional de Atividades Espaciais (PNAE) é um programa brasileiro de incentivo ao desenvolvimento das atividades espaciais. Ele representa as prioridades de integração da política espacial às demais políticas públicas em execução no Brasil e foi resultado de um seminário realizado por representantes do Governo, de segmentos científicos, acadêmicos e empresariais. Por se tratar de um documento de importância nacional, o relatório do PNAE é um documento disponível a toda sociedade, porém com um vocabulário muito técnico, podendo limitar a compreensão dos leitores leigos da área espacial tais como gestores públicos e a própria sociedade. Tendo em vista esse cenário, este trabalho propõe uma aplicação, batizada de Indexer, que identifica todos os termos técnicos simples e compostos, no domínio da área espacial, do documento do PNAE. Além de identificar os termos técnicos, o Indexer também apresenta os respectivos significados ao leitor no momento em que ele posiciona o ponteiro do Mouse sobre as palavras escolhidas, agregando valor descritivo aos termos e fornecendo informações contextualizadas. Os termos técnicos da área espacial são identificados de acordo com o Dicionário Enciclopédico de Astronomia e Astronáutica, que foi estruturado e preparado para a consulta. O Indexer foi desenvolvido na linguagem Python e possui também a possibilidade de indexar outros documentos da área espacial que estejam disponíveis em formato .html ou .txt. Concluiu-se do trabalho realizado que o objetivo do desenvolvimento do Indexer foi alcançado, isto é, os resultados obtidos proveram ao leitor o enriquecimento do documento do PNAE e de outros documentos da área com informações complementares dos termos técnicos espaciais, diferenciando termos simples de termos compostos o que aumenta a contextualização dos significados.The National Program of Spacial Activities (PNAE) is a Brazilian program to encourage the development of spacial activities. The PNAE represents the integration priorities of the spacial policy to other public policies in execution at Brazil. The PNAE was launched by a Government Seminar where scientists, academic and business segments participated. Regarding the national importance of this document, the PNAE report, it is a document available to the whole society. Nevertheless, the PNAE report uses technical vocabulary that limits the understanding of citizens and public managers. Given this scenario, this work proposes an application, named Indexer, which identifies all the technical terms simple and compound, in the field of space research. In addition to identify the technical terms, the Indexer also presents their meanings to the reader by positioning the Mouse Pointer over the words identified, adding descriptive value to the terms and providing contextual information. Technical terms of spatial area are identified according to the Encyclopedic Dictionary of Astronomy and Astronautics, which was structured and prepared for database querying. The Indexer has been developed in Python, and has the possibility of indexing other spatial-related documents that are available in .html or .txt. As a conclusion, the Indexer proposed and developed in this project has provided the reader the enrichment of the Program document and other documents in the spatial area with complementary information of the technical terms, differentiating simple and compound terms which enhances the meanings contextualization
Ambard Maxime - One of the best experts on this subject based on the ideXlab platform.
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Sunny Pointer: Designing a Mouse Pointer for people with peripheral vision loss
'Informa UK Limited', 2021Co-Authors: Ambard MaximeAbstract:International audienceWe introduce here a new Mouse cursor designed to facilitate the use of the Mouse by people with peripheral vision loss. The Pointer consists of a collection of converging straight lines covering the whole screen and following the position of the Mouse cursor. We measured its positive effects in a group of participants with peripheral vision loss of different kinds and found that it can reduce by a factor of seven the time required to complete a targeting task using the Mouse. Using eye tracking, we show that this system makes it possible to initiate the movement toward the target without having to precisely locate the Mouse Pointer. Using Fitts’ Law, we compare these performances with those of full visual field users in order to understand the relation between the accuracy of the estimated Mouse cursor position and the index of performance obtained with our tool
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Sunny Pointer: Designing a Mouse Pointer for people with peripheral vision loss
2020Co-Authors: Ambard MaximeAbstract:We present a new Mouse cursor designed to facilitate the use of the Mouse by people with peripheral vision loss. The Pointer consists of a collection of converging straight lines covering the whole screen and following the position of the Mouse cursor. We measured its positive effects with a group of participants with peripheral vision loss of different kinds and we found that it can reduce by a factor of 7 the time required to complete a targeting task using the Mouse. Using eye tracking, we show that this system makes it possible to initiate the movement towards the target without having to precisely locate the Mouse Pointer. Using Fitts' Law, we compare these performances with those of full visual field users in order to understand the relation between the accuracy of the estimated Mouse cursor position and the index of performance obtained with our tool.Comment: 15 pages, 10 figures, 3 experiment
Frederic Kaplan - One of the best experts on this subject based on the ideXlab platform.
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are gesture based interfaces the future of human computer interaction
International Conference on Multimodal Interfaces, 2009Co-Authors: Frederic KaplanAbstract:The historical evolution of human machine interfaces shows a continuous tendency towards more physical interactions with computers. Nevertheless, the Mouse and keyboard paradigm is still the dominant one and it is not yet clear whether there is among recent innovative interaction techniques any real challenger to this supremacy. To discuss the future of gesture-based interfaces, I shall build on my own experience in conceiving and launching QB1, probably the first computer delivered with no Mouse or keyboard but equipped with a depth-perceiving camera enabling interaction with gestures. The ambition of this talk is to define more precisely how gestures change the way we can interact with computers, discuss how to design robust interfaces adapted to this new medium and review what kind of applications benefit the most from this type of interaction. Through a series of examples, we will see that it is important to consider gestures not as a way of emulating a Mouse Pointer at a distance or as elements of a "vocabulary" of commands, but as a new interaction paradigm where the interface components are organized in the user's physical space. This is a shift of reference frame, from a metaphorical virtual space (e.g. the desktop) where the user controls a representation of himself (e.g. the Mouse Pointer) to a truly user-centered augmented reality interface where the user directly touches and manipulates interface components positioned around his body. To achieve this kind of interactivity, depth-perceiving cameras can be relevantly associated with robotic techniques and machine vision algorithms to create a "halo" of interactivity that can literally follow the user while he moves in a room. In return, this new kind of intimacy with a computer interface paves the ways for innovative machine learning approaches to context understanding. A computer like QB1 knows more about its user than any other personal computer so far. Gesture-based interaction is not a mean for replacing the Mouse with cooler or more intuitive ways of interacting but leads to a fundamentally different approach to the design human-computer interfaces.
Ovalle-carranza, Demetrio A. - One of the best experts on this subject based on the ideXlab platform.
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IMU-Mouse: diseño e implementación de un dispositivo apuntador dirigido al desarrollo de interfaces adaptativas para personas con discapacidad física
'Instituto Tecnologico Metropolitano (ITM)', 2018Co-Authors: Castillo-benavides, Camilo A., García-arias, Luís F., Duque-méndez, Néstor . D, Ovalle-carranza, Demetrio A.Abstract:The correct application of ICTs (information and communications technologies) to the education of people with physical disabilities requires studies aimed to adapt interfaces. Controlling the design and implementation of input devices would contribute to develop interfaces tailored to the requirements of such context. The purpose of this work is to present the development and validation of the IMU-Mouse Pointer device whose design and implementation is controlled—for researching interfaces that make the most of the interaction capabilities of the devices in adaptation processes. The purpose of the device is to address the needs created by physical disability in upper limps; hence it operates with head movements. Both actions of the IMU-Mouse, click and move, are performed by processing the data generated by an accelerometer and a gyroscope. The main interaction features of the IMU-Mouse were assessed by group of 13 people by means of a survey based on Annex C of ISO 9241-9 standard. The results lead to conclude that the device enables an effective interaction with the computer, as well as the identification of spaces for the application of hardware and software add-ons to support interaction.La aplicación adecuada de las TIC (Tecnologías de la Información y Comunicación) para el aprendizaje de personas con discapacidad física exige estudios dirigidos a la adaptación de interfaces. El control sobre el diseño e implementación de dispositivos de entrada contribuiría al desarrollo de interfaces capaces de atender las necesidades en el contexto descrito anteriormente. El objetivo de este trabajo es presentar el desarrollo y la validación del dispositivo apuntador IMU-Mouse, para el cual se tiene el control sobre su diseño e implementación dirigido a la investigación de interfaces, que hagan uso de las capacidades de interacción del aparato en los procesos de adaptación. El dispositivo está dirigido a atender las necesidades inducidas por la discapacidad física en extremidades superiores y por esto opera con los movimientos de la cabeza. Las acciones de clic y desplazamiento del IMU-Mouse se ejecutan a partir del procesamiento de los datos generados por un acelerómetro y un giroscopio. Los principales aspectos de la interacción fueron evaluados por un grupo de 13 personas mediante una encuesta basada en el anexo C del estándar ISO 9241-9. De acuerdo con los resultados obtenidos, se concluye que el dispositivo habilita una interacción efectiva con el computador, y además permiten la identificación de espacios para la aplicación de complementos de hardware y software para asistir las acciones de interacción
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IMU-Mouse: design and implementation of a pointing device for people with disabilities
'Instituto Tecnologico Metropolitano (ITM)', 2018Co-Authors: Castillo-benavides, Camilo A., García-arias, Luís F., Duque-méndez, Néstor . D, Ovalle-carranza, Demetrio A.Abstract:La aplicación adecuada de las TIC (Tecnologías de la Información y Comunicación) para el aprendizaje de personas con discapacidad física exige estudios dirigidos a la adaptación de interfaces. El control sobre el diseño e implementación de dispositivos de entrada contribuiría al desarrollo de interfaces capaces de atender las necesidades en el contexto descrito anteriormente. El objetivo de este trabajo es presentar el desarrollo y la validación del dispositivo apuntador IMU-Mouse, para el cual se tiene el control sobre su diseño e implementación dirigido a la investigación de interfaces, que hagan uso de las capacidades de interacción del aparato en los procesos de adaptación. El dispositivo está dirigido a atender las necesidades inducidas por la discapacidad física en extremidades superiores y por esto opera con los movimientos de la cabeza. Las acciones de clic y desplazamiento del IMU-Mouse se ejecutan a partir del procesamiento de los datos generados por un acelerómetro y un giroscopio. Los principales aspectos de la interacción fueron evaluados por un grupo de 13 personas mediante una encuesta basada en el anexo C del estándar ISO 9241-9. De acuerdo con los resultados obtenidos, se concluye que el dispositivo habilita una interacción efectiva con el computador, y además permiten la identificación de espacios para la aplicación de complementos de hardware y software para asistir las acciones de interacción.The correct application of ICTs (information and communications technologies) to the education of people with physical disabilities requires studies aimed to adapt interfaces. Controlling the design and implementation of input devices would contribute to develop interfaces tailored to the requirements of such context. The purpose of this work is to present the development and validation of the IMU-Mouse Pointer device whose design and implementation is controlled—for researching interfaces that make the most of the interaction capabilities of the devices in adaptation processes. The purpose of the device is to address the needs created by physical disability in upper limps; hence it operates with head movements. Both actions of the IMU-Mouse, click and move, are performed by processing the data generated by an accelerometer and a gyroscope. The main interaction features of the IMU-Mouse were assessed by group of 13 people by means of a survey based on Annex C of ISO 9241-9 standard. The results lead to conclude that the device enables an effective interaction with the computer, as well as the identification of spaces for the application of hardware and software add-ons to support interaction
Margrit Betke - One of the best experts on this subject based on the ideXlab platform.
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HMAGIC: Head Movement And Gaze Input Cascaded Pointing
2016Co-Authors: Andrew Kurauchi, Wenxin Feng, Carlos Morimoto, Margrit BetkeAbstract:Augmentative and alternative communication tools allow people with severe motor disabilities to interact with com-puters. Two commonly used tools are video-based interfaces and eye trackers. Video-based interfaces map head move-ments captured by a camera to Mouse Pointer movements. Alternatively, eye trackers place the Mouse Pointer at the estimated position of the user’s gaze. Eye tracking based interfaces have been shown to even outperform traditional mice in terms of speed, however the accuracy of current eye trackers is not enough for fine Mouse Pointer placement. In this paper we propose the Head Movement And Gaze In-put Cascaded (HMAGIC) pointing technique that combines head movement and gaze-based inputs in a fast and accurate Mouse-replacement interface. The interface initially places the Pointer at the estimated gaze position and then the user makes fine adjustments with their head movements. We conducted a user experiment to compare HMAGIC with a Mouse-replacement interface that uses only head movements to control the Pointer. Experimental results indicate that HMAGIC is significantly faster than the head-only interface while still providing accurate Mouse Pointer positioning
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Towards a multi-camera Mouse-replacement interface
2013Co-Authors: John Magee, Harshith Chennamaneni, Samuel Epstein, Diane H. Theriault, Margrit BetkeAbstract:Abstract. We present our efforts towards a multi-camera Mouse-replacement system for computer users with severe motion impairments. We have worked with individuals with cerebral palsy or multiple sclerosis who use a publiclyavailable interface that tracks the user’s head movements with a single video camera and translates them into Mouse Pointer coordinates on the screen. To address the problem that the interface can lose track of the user’s facial feature due to occlusion or spastic movements, we started to develop a multi-camera interface. Our multi-camera capture system can record synchronized images from multiple cameras and automatically analyze the camera arrangement. We recorded 15 subjects while they were conducting a hands-free interaction experiment. We reconstructed via stereoscopy the three-dimensional movement trajectories of various facial features. Our analysis shows that single-camera interfaces based on twodimensional feature tracking neglect to take into account the substantial feature movement in the third dimension.
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the camera Mouse visual tracking of body features to provide computer access for people with severe disabilities
IEEE Transactions on Neural Systems and Rehabilitation Engineering, 2002Co-Authors: Margrit Betke, James Gips, Peter FlemingAbstract:The "Camera Mouse" system has been developed to provide computer access for people with severe disabilities. The system tracks the computer user's movements with a video camera and translates them into the movements of the Mouse Pointer on the screen. Body features such as the tip of the user's nose or finger can be tracked. The visual tracking algorithm is based on cropping an online template of the tracked feature from the current image frame and testing where this template correlates in the subsequent frame. The location of the highest correlation is interpreted as the new location of the feature in the subsequent frame. Various body features are examined for tracking robustness and user convenience. A group of 20 people without disabilities tested the Camera Mouse and quickly learned how to use it to spell out messages or play games. Twelve people with severe cerebral palsy or traumatic brain injury have tried the system, nine of whom have shown success. They interacted with their environment by spelling out messages and exploring the Internet.