Graphene Nanoribbons (GNRs), now-a-days, are used in detecting Deoxyribonucleic Acid (DNA) which is one of the breakthroughs in modern nanobiomaterial and biomedical applications. The conductance is calculated by tran...
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Graphene Nanoribbons (GNRs), now-a-days, are used in detecting Deoxyribonucleic Acid (DNA) which is one of the breakthroughs in modern nanobiomaterial and biomedical applications. The conductance is calculated by transferring the electron from DNA to Graphene Nanoribbon sample. The conductance is the basic parameter of calculating carrier properties from DNA to GNR pathway. One of the carrier properties is mobility upon which hereditary information can be observed for different patch of helix. In this paper, firstly we will observe conductance for DNA-GNR structure by controlling the gate voltage. Then we will measure the variation of mean free path for different conductance of this structure. From this observation, we will investigate the resistivity and calculate the carrier mobility through DNA to GNR sample.
A new type of optical voltage sensor(OVS) based on conoscopic interference is proposed, and its performance is simulated with the aid of polarized optical theory. Due to the polarized light convergent interference, th...
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A new type of optical voltage sensor(OVS) based on conoscopic interference is proposed, and its performance is simulated with the aid of polarized optical theory. Due to the polarized light convergent interference, the electro-optical phase change is converted to the real time rotation of image. This new OVS has a wide phase measurement range extended to 180 degree. Different from normal intensity measurement mode, OVS based on conoscopic interference measure the electro-optical phase linearly, and measured signal is unrelated to the absolute light intensity.
This work presents a single-chip sub-mm 3 wireless pressure sensor suitable for tire pressure monitoring. The dynamic behavior and safety of an automobile tire is closely dependent on its inflation pressure: maintain...
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This work presents a single-chip sub-mm 3 wireless pressure sensor suitable for tire pressure monitoring. The dynamic behavior and safety of an automobile tire is closely dependent on its inflation pressure: maintaining the manufacturer-recommended pressure is essential to prevent tire failure, provide stability, improve fuel efficiency and tire-life, and to reduce C0 2 emissions [1]. Thus, Tire-Pressure Monitoring Systems (TPMS) have become an essential component in modern vehicles, as stipulated by the National Highway Traffic Safety Administration (NHTSA) in 2006. State-of-the-art TPMS systems currently require a pressure sensor, multiple ICs, several external components, and a crystal on a PCB allowing wireless transmission of tire pressure [2] [3]. In this work, we describe a sub-mm 3 fully integrated wireless pressure sensor including a pressure transducer, interface circuitry, integrated timing reference, and a wireless transmitter integrated into a single die.
Recently Internet of Things(IoT) technology, especially the technologies used for Wireless sensor Network (WSN) have attracted great amount of attention. Since ZigBee, which is a low-power and low cost technology, is ...
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Recently Internet of Things(IoT) technology, especially the technologies used for Wireless sensor Network (WSN) have attracted great amount of attention. Since ZigBee, which is a low-power and low cost technology, is appeared, related applications are proliferation. The studies of how energy efficiency can be further achieved are steadily on progress. In this paper, we propose a method which increases the energy efficiency by reducing unnecessary Clear Channel Assessment(CCA) and by increasing the sleep duration of End-Device through changing the structure of a ZigBee Superframe using the IEEE 802.15.4 Medium Access Control(MAC). Simulation results show that our method increases energy efficiency.
The rapid development of wireless communication technologies and portable mobile devices such as laptops, PDAs, smart phones and wireless sensors brings the best out of mobile computing particularly mobile ad-hoc and ...
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The rapid development of wireless communication technologies and portable mobile devices such as laptops, PDAs, smart phones and wireless sensors brings the best out of mobile computing particularly mobile ad-hoc and sensor networks. Nowadays, most of researchers working on Wireless sensor Networks (WSNs) focus on Mobile Ad-hoc and sensor Networks (MASNETs) due to their wide range of potential applications ranging from underwater monitoring to search and rescue mobile robotics applications. In this research work, through extensive simulation, we have evaluated the capability of Ad-hoc On Demand Distance Vector (AODV) routing protocol on how far it can react to different mobility duration of mobile nodes in MASNETs. The performance of AODV is investigated in terms of the average percentage of packet loss and energy consumption. The initial performance study demonstrates that the performance of AODV is signicantly decreased in mobile environment due to the frequent topology change in MASNETs. Therefore, in order to enhance the performance of AODV in MASNETs, the new routing algorithm based on the estimated distance is proposed to replace the hop count for the selection of next node during the packet transmission. The estimated distance is computed based on the Received Signal Strength Indicator (RSSI) values that are collected during the communication between the sensor nodes. The performance of the proposed solution is also further evaluated and compared with the existing AODV routing protocol in term of their energy consumption and percentage of packet loss. Our study demonstrates that the proposed solution outperform the existing AODV in MASNETs.
Wireless technologies have been successfully applied in the process industry since the creation of the first international standard IEC62591 WirelessHART. applications started in areas where wireless sensors provide r...
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ISBN:
(纸本)9781479989386
Wireless technologies have been successfully applied in the process industry since the creation of the first international standard IEC62591 WirelessHART. applications started in areas where wireless sensors provide rich process information to the automation systems. Although real and demonstrated control applications are advertised, wireless-for-control is still in the initial stage and faces a lot of challenges. In particular, feedback latency and battery longevity, which are also problems for wireless-for-sensing, are even more critical when wireless actuators are applied. There are additional challenges in using wireless actuators because they actively affect the process. This paper lays the foundation for control using a wireless actuator. It demonstrates how traditional control methodologies can be modified to effectively work with general wireless communication. The innovations are tested with simulations and experimentations, both on commercial distributed control systems.
Most of the currently deployed integrated home management products require an experienced technician to install and configure the system. In this paper, we build upon the Internet of Things (IoT) paradigm, with the ai...
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Most of the currently deployed integrated home management products require an experienced technician to install and configure the system. In this paper, we build upon the Internet of Things (IoT) paradigm, with the aim of delivering networked solutions that enable multi-node wireless sensor networks (WSNs) to connect to the Internet in a secure, simple and efficient way. We also describe the design and implementation of a smart-home management system. The system is composed of a lightweight tool with an intuitive user interface for commissioning of IP-enabled WSNs. The solution includes a visual programming interface with a common framework for discovering smart home services on the WSN, and a code analysis and translation engine to generate Python code. This engine analyses the application rules defined with the graphical user interface and translates them into distributed application scripts. The system also includes modules to plan the optimization of the deployment, and deploy and start the generated code. In this paper we present a prototype of the system, with the visual programming solution and code generation module.
Single-sensor color cameras, which classically use a color filter array (CFA) to sample RGB channels, have recently been extended to the multispectral domain. To sample more than three wavelength bands, such systems u...
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ISBN:
(纸本)9781479986385
Single-sensor color cameras, which classically use a color filter array (CFA) to sample RGB channels, have recently been extended to the multispectral domain. To sample more than three wavelength bands, such systems use a multispectral filter array (MSFA) that provides a raw image in which a single channel level is available at each pixel. A demosaicing procedure is then needed to estimate a multispectral image with full spectral resolution. In this paper, we propose a new demosaicing method that takes spectral and spatial correlations into account by estimating the level for each channel. Experimental results show that it provides estimated images of better quality than classical methods.
This paper proposes a novel approach to obstacle detection and collision avoidance using ultrasonic sensors in indoor environment. The aim was to develop an autonomous flying quad-copter for indoor applications. The a...
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This paper proposes a novel approach to obstacle detection and collision avoidance using ultrasonic sensors in indoor environment. The aim was to develop an autonomous flying quad-copter for indoor applications. The approach has been implemented and tested in variety of environments consisting of obstacles of varying heights and dimly-lit conditions. Indoor applications present a major problem of space limitation. Without carefree maneuvering, one might end up hurting oneself or damaging the quad-copter. Using ultrasonic sensors, this problem can be eliminated to an appreciable extent. A hardware design has been proposed after testing and experimentation, followed by an algorithm for computer assisted maneuvering in static indoor environment. The outcomes have been graphically depicted and accompanied by an extensive discussion.
This paper presents design, implementation details and field trial results for a multimodal human machine interface for a robotic walking and sit-to-stand transfer assisting device with force-torque-sensor, user inten...
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This paper presents design, implementation details and field trial results for a multimodal human machine interface for a robotic walking and sit-to-stand transfer assisting device with force-torque-sensor, user intention detection and active fall prevention. Two different human machine interfaces are described, a purely haptic version with buttons only and an alternative approach using a tablet computer. It is described, how the different modalities, optimized for the target user group of elderly persons, make the interaction with the system intuitive and reduce fear of contact with such a technical system. For the tablet PC based touch sensitive interface we describe our approach to automatically track user interactions with the system for detailed analysis and user interface optimization.
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