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484 articles for “Sensor”
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Research ArticleOpen accessEvery word in the titleContour Following Task with Dual Sensor Logic Algorithm for Adept Selective Compliant Assembly Robot Arm RobotAnton Satria Prabuwono, Samsi Md. Said, Riza Sulaiman, Elankovan SundararajanProblem statement: The capability of performing autonomously a contour following task of a shape object is required for an industrial robot manipulator. These tasks include welding, sealing, grinding, painting and many more. These applications are very tedious and time consuming if done by manual contour following system. Approach: This study proposed the development of dual sensor logic algorithm for contour … …Journal of Computer Science, Vol. 5, Issue 8 · 31 Dec 2009 · 6,751 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleProgressive Content-Sensitive Data Retrieval in Sensor NetworksBo Yang, Manohar MareboyanaProblem statement: For a sensor network comprising autonomous and self-organizing data sources, efficient similarity-based search for semantic-rich resources (such as video data) has been considered as a challenging task due to the lack of infrastructures and the multiple limitations (such as band-width, storage and energy). While the past research discussed much on routing protocols for sensor networks, few works have … …Journal of Computer Science, Vol. 5, Issue 7 · 31 Jul 2009 · 6,849 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleDesign of Modified Adaptive Huffman Data Compression Algorithm for Wireless Sensor NetworkC. Tharini, P. Vanaja RanjanProblem statement: Efficient utilization of energy has been a core area of research in wireless sensor networks. Sensor nodes deployed in a network are battery operated. As batteries cannot be recharged frequently in the field setting, energy optimization becomes paramount in prolonging the battery-life and, consequently, the network lifetime. The communication module utilizes a major part of the energy expenditure … …Journal of Computer Science, Vol. 5, Issue 6 · 30 Jun 2009 · 8,353 accessesView PDFCite
Research ArticleOpen accessEvery word in the titlePriority and Random Selection for Dynamic Window Secured Implicit Geographic Routing in Wireless Sensor NetworkZurina Mohd Hanapi, Mahmod Ismail, Kasmiran JumariProblem statement: Sensor nodes are easily exposed to many attacks since it were deployed in unattended adversarial environment with no global addressing and used for critical applications such as battlefield surveillance and emergency response. While the sensor also needs to act as a router to relay a message to a required recipient, then this increased the vulnerabilities to a network … …American Journal of Engineering and Applied Sciences, Vol. 2, Issue 2 · 30 Jun 2009 · 7,656 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleOptimal Power Control with Overhearing Avoidance for Wireless Sensor NetworksM. Ramakrishnan, P. Vanaja RanjanProblem statement: Extending lifetime of the battery operated wireless sensor nodes through the design of low power medium access control protocols dealt in this study. Approach: In this study energy efficient Optimal Power Control MAC with Overhearing Avoidance (OPC-OA) was proposed. The transmission power of every node was dynamically changed for the optimal connectivity between nodes. The optimal transmission power … …Journal of Computer Science, Vol. 5, Issue 4 · 30 Apr 2009 · 7,132 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleComparative Studies on the Performance of Low Power Transmitters for Wireless Sensor NodesT. Sasilatha, J. RajaProblem statement: Power consumption was one of the most challenging aspects to design low power wireless sensor nodes. The objectives of the study were to (i) Design low voltage, low power transmitters for wireless sensor nodes and (ii) Compare and analyze the performance of the transmitters. Approach: The transmitters employed direct digital modulation scheme to reduce the power consumption of … …Journal of Computer Science, Vol. 5, Issue 2 · 28 Feb 2009 · 7,453 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleA Tactile Sensor for Detection of Skin Surface Morphology and its Application in Telemedicine SystemsRoozbeh Khodambashi, Siamak Najarian, Ali Tavakoli Golpaygani et al.We proposed a new type of tactile sensor that is capable of determining the surface morphology of skin lesions. The sensor consists of a brass cylinder with an axial bore. Three peripheral bobbins were machined in the cylinder around which three coils have been wound. An iron core can easily move inside the bore. One of the coils acts as … …American Journal of Applied Sciences, Vol. 5, Issue 6 · 30 Jun 2008 · 7,263 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleOperating System Support for Wireless Sensor NetworksAnt A. Fröhlich, Lucas F. WannerIn a wireless sensor network, several sensor nodes obtain local data and communicate among themselves in order to create a global vision of an object of study. The idea of a self-managed network of low-power, autonomous devices, that collects data from an environment and propagates information through a wireless link brought about several new challenges and requirements in application run-time … …Journal of Computer Science, Vol. 4, Issue 4 · 30 Apr 2008 · 7,385 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleFabrication of a Capacitance-Based Tactile Sensor with Biomedical ApplicationsAli Tavakoli Golpaygani, Siamak Najarian, M. Mehdi Movahedi, Goldis Darb EmamiehThe design, modeling, and testing of a flexible tactile sensor and its applications are presented. This sensor is made of polymer materials and can detect the 2D surface texture image and contact-force estimation. The sensing mechanism is based on the novel contact deflection effect of a membrane. We measure the amount of membrane deflection with measuring the change of capacitance … …American Journal of Applied Sciences, Vol. 5, Issue 2 · 28 Feb 2008 · 7,394 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleExperimental and Theoretical Analysis of a Novel Flexible Membrane Tactile SensorGoldis Darb Emamieh, Ahmad Ameri, Siamak Najarian, Ali Tavakoli GolpayganiIn this study, we report the development of a new multi tactile sensor, capable of detecting 2D surface texture image, measuring contact-force, and identifying the difference between stiffness of sensed objects. The designed tactile sensor consists of a chamber and a membrane with a mesa structure. The detecting principle is a combination of membrane deflection and piezoresistance effects. A major … …American Journal of Applied Sciences, Vol. 5, Issue 2 · 28 Feb 2008 · 7,190 accessesView PDFCite