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Smart Charging Technologies for Portable Electronic Devices  [PDF]
Stefan Hild,Sean Leavey,Christian Gr?f,Borja Sorazu
Computer Science , 2012,
Abstract: In this article we describe our efforts of extending demand-side control concepts to the application in portable electronic devices, such as laptop computers, mobile phones and tablet computers. As these devices feature built-in energy storage (in the form of batteries) and the ability to run complex control routines, they are ideal for the implementation of smart charging concepts. We developed a prototype of a smart laptop charger that controls the charging process depending on the locally measured frequency of the electricity grid. If this technique is incorporated into millions of devices in UK households, this will contribute significantly to the stability of the electricity grid, help to mitigate the power production fluctuations from renewable energy sources and avoid the high cost of building and maintaining conventional power plants as standby reserve.
A Smart Displaying Scheme for Real-time Football Video on Portable Devices
一种面向移动设备的实时足球视频智能播放方案

YAN Hong-bo,LIU Zhi,ZHANG Zhao-yang,
颜红波
,刘志,张兆杨

中国图象图形学报 , 2008,
Abstract: In order to facilitate video production of the front end,a smart displaying scheme for real-time soccer video on portable devices was proposed. Using the proposed scheme,which can solve the problem of wonderful specifics loss under the reduced resolution users can appreciate real-time soccer games comfortably under low resolution circumstance of portable devices. Different from typical football processing techniques,the proposed scheme exploits a wholly region-based approach to analyze real-time soccer video,and can reduce the computational complexity substantially and satisfy the real-time processing requirements while loosen the dependency on hardware equipments. The proposed scheme is composed of two stages:shot classification and dynamic extraction and playing of region of interest (ROI). The experimental results manifest that the scheme is indeed efficient,practical as well as reliable,and can play real-time soccer video smartly on portable devices.
Design of Polygonal Patch Antennas for Portable Devices
Filiberto Bilotti;Claudio Vegni
PIER B , 2010, DOI: 10.2528/PIERB10020208
Abstract: In this paper, extending the design technique presented by the authors in a previous work, we propose the study of a new family of polygonal patch antennas for portable devices of communication systems. Such antennas are suitable to be mounted in modern terminals, enabling wideband/multi-frequency operation and new multimedia features. The desired electromagnetic behaviour of the proposed radiators is obtained by adding either shorting posts, properly located between the polygonal patch and the ground plane, or circular slots, drilled at the appropriate position on the patch surface. Circular slots are also useful to easily accommodate a photo-camera in the terminal, in order to enable multimedia services and video calls. Some practical layouts of polygonal patch antennas to be used in: a) modern PDAs and Smart Phones integrating cellular phone operation and wireless functionalities; b) UMTS terminals integrating also GSM functionalities, are, finally, presented. The effectiveness of the proposed designs is confirmed through proper full-wave numerical simulations.
From online experiments to smart devices  [cached]
Christophe Salzmann,Denis Gillet
International Journal of Online Engineering (iJOE) , 2008,
Abstract: Online experiments have been available for more than a decade. The integration of online experiments into collaborative environments is more recent. The wealth of client applications/environments, the versatility of possible interaction protocols/technologies and the needs for more autonomous actions impel the evolution of online experiments to the smart device concept. This paper reviews the evolution of an electrical drive experiment and presents the requirements for turning online experiments into smart devices.
Robustness Comparison of Emerging Devices for Portable Applications
S. D. Pable,Mohd. Ajmal Kafeel,A. K. Kureshi,Mohd. Hasan
Journal of Nanomaterials , 2012, DOI: 10.1155/2012/242459
Abstract: Extensive development in portable devices imposes pressing need for designing VLSI circuits with ultralow power (ULP) consumption. Subthreshold operating region is found to be an attractive solution for achieving ultralow power. However, it limits the circuit speed due to use of parasitic leakage current as drive current. Maintaining power dissipation at ultralow level with enhanced speed will further broaden the application area of subthreshold circuits even towards the field programmable gate arrays and real-time portable domain. Operating the Si-MOSFET in subthreshold regions degrades the circuit performance in terms of speed and also increases the well-designed circuit parameter spreading due to process, voltage, and temperature variations. This may cause the subthreshold circuit failure at very low supply voltage. It is essential to examine the robustness of most emerging devices against PVT variations. Therefore, this paper investigates and compares the performance of most promising upcoming devices like CNFET and DG FinFET in subthreshold regions. Effect of PVT variation on performance of CNFET and DG FinFET has been explored and it is found that CNFET is more robust than DG-FinFET under subthreshold conditions against PVT variations.
Fingerprinting Smart Devices Through Embedded Acoustic Components  [PDF]
Anupam Das,Nikita Borisov,Matthew Caesar
Computer Science , 2014,
Abstract: The widespread use of smart devices gives rise to both security and privacy concerns. Fingerprinting smart devices can assist in authenticating physical devices, but it can also jeopardize privacy by allowing remote identification without user awareness. We propose a novel fingerprinting approach that uses the microphones and speakers of smart phones to uniquely identify an individual device. During fabrication, subtle imperfections arise in device microphones and speakers which induce anomalies in produced and received sounds. We exploit this observation to fingerprint smart devices through playback and recording of audio samples. We use audio-metric tools to analyze and explore different acoustic features and analyze their ability to successfully fingerprint smart devices. Our experiments show that it is even possible to fingerprint devices that have the same vendor and model; we were able to accurately distinguish over 93% of all recorded audio clips from 15 different units of the same model. Our study identifies the prominent acoustic features capable of fingerprinting devices with high success rate and examines the effect of background noise and other variables on fingerprinting accuracy.
Guest Editorial: Smart rehabilitation for the 21st century: The Tampa Smart Home for veterans with traumatic brain injury
Jan Jasiewicz, PhD,William Kearns, PhD,Jeffrey Craighead, PhD,James L. Fozard, PhD
Journal of Rehabilitation Research and Development , 2011,
Abstract: In this editorial, we report on the development of a smart-home-based cognitive prosthetic that will deliver 24/7 rehabilitation at the James A. Haley Veterans' Hospital Polytrauma Transitional Rehabilitation Program (PTRP) facility in Tampa, Florida. The Tampa Smart Home was designed to address two weaknesses identified by PTRP clinicians in the rehabilitation process for patients with traumatic brain injury (TBI): (1) patient safety and (2) inadequate timing and repetition of prompts used to overcome TBI-related cognitive and memory deficits.
A portable powered ankle-foot orthosis for rehabilitation
K. Alex Shorter, PhD,Géza F. Kogler, PhD, CO,Eric Loth, PhD,William K. Durfee, PhD
Journal of Rehabilitation Research and Development , 2011,
Abstract: Innovative technological advancements in the field of orthotics, such as portable powered orthotic systems, could create new treatment modalities to improve the functional outcome of rehabilitation. In this article, we present a novel portablepowered ankle-foot orthosis (PPAFO) to provide untethered assistance during gait. The PPAFO provides both plantar flexor and dorsiflexor torque assistance by way of a bidirectional pneumatic rotary actuator. The system uses a portable pneumatic power source (compressed carbon dioxide bottle) and embedded electronics to control the actuation of the foot. We collected pilot experimental data from one impaired and three nondisabled subjects to demonstrate design functionality. The impaired subject had bilateral impairment of the lower legs due to cauda equina syndrome. We found that data from nondisabledwalkers demonstrated the PPAFO’s capability to provide correctlytimed plantar flexor and dorsiflexor assistance during gait. Reduced activation of the tibialis anterior during stance and swing was also seen during assisted nondisabled walking trials. An increase in the vertical ground reaction force during the second half of stance was present during assisted trials for the impaired subject. Data from nondisabled walkers demonstrated functionality, and data from an impaired walker demonstrated the ability to provide functional plantar flexor assistance.
Design and Fabrication of Acoustic Wave Actuated Microgenerator for Portable Electronic Devices  [PDF]
Tenghsien Lai,Changhan Huang,Chingfu Tsou
Computer Science , 2008,
Abstract: The past few years have seen an increasing focus on energy harvesting issue, including power supply for portable electric devices. Utilize scavenging ambient energy from the environment could eliminate the need for batteries and increase portable device lifetimes indefinitely. In addition, through MEMS technology fabricated micro-generator could easy integrate with these small or portable devices. Several different ambient sources, including solar, vibration and temperature effect, have already exploited [1-3]. Each energy source should be used in suitable environment, therefore to produce maximum efficiency. In this paper, we present an acoustic wave actuated micro-generator for power system by using the energy of acoustic waves, such as the sound from human voices or speakerphone, to actuate a MEMS-type electromagnetic transducer. This provides a longer device lifetime and greater power system convenience. Moreover, it is convenient to integrate MEMS-based microgenerators with small or porta le devices
Cross-platform Transplant of Embedded Smart Devices  [cached]
Jing Zhang,XinGuang Li
Journal of Software , 2010, DOI: 10.4304/jsw.5.10.1084-1090
Abstract: In the field of embedded software development, the total involvement of application software transplanted in a variety of different platforms occupies more parts than expected in a whole project. In the face of smart devices based on different operating systems and hardware platforms, it’s of great significance to enhance the repeatability of application source code and the Cross-platform portability. Procedures for intelligent devices were designed according to the features of Windows Embedded CE6.0 as well as the characteristics of Visual Studio.net 2005, that the build environment. FmodMp3 player program was designed with managed language and transplanted to different intelligent devices, then the goal of cross-platform transplantation, that “code once written then ran in different platform” achieved. Paper also gave some advice about how to improve decompile capacity of managed programs.
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