Current Issue : January - March Volume : 2015 Issue Number : 1 Articles : 6 Articles
To tackle the growing complexity and huge demand for tailored domestic video surveillance systems along with a\nhigh demanding time-to-market expectation, engineers at IVV AutomacÃ?¸ Ã?Å?ao, LDAa are exploiting video surveillance\ndomain as families of systems that can be developed following a pay-as-you-go fashion rather than developing an exnihilo\nnew product. Several and different new functionalities are required for each new productââ?¬â?¢s hardware platforms\n(e.g., ranging from mobile phone, PDA to desktop PC) and operating systems (e.g., flavors of Linux, Windows and MAC\nOS X). Some of these functionalities have special economical constraints of development time and memory footprint.\nTo better accommodate all the above listing requirements, a model-driven generative software development\nparadigm supported by mainstream tools is proposed to offer a significant leverage in hiding commonalities and\nconfiguring variabilities across families of video surveillance products while maintaining the new product quality....
This paper discusses the space-time coding (STC) problem for RFID MIMO systems. First, a mathematical model for this\nkind of system is developed from the viewpoint of signal processing, which makes it easy to design the STC schemes.\nThen two STC schemes, namely Scheme I and Scheme II, are proposed. Simulation results illustrate that the proposed\napproaches can greatly improve the symbol-error rate (SER) or bit-error rate (BER) performance of RFID systems,\ncompared to the non space-time encoded RFID system. The SER/BER performance for Scheme I and Scheme II is\nthoroughly compared. It is found that Scheme II with the innate real-symbol constellation yields better SER/BER\nperformance than Scheme I. Some design guidelines for RFID-MIMO systems are pointed out....
The electricity department has to send employees to take electric meter reading every month, which is time consuming and expensive job. This system provides a favorable and efficacious method to solve this problem. The electricity department can take the readings of electricity meter using GSM. The principal objective of this paper is to build a GSM based electricity meter reading system and also the loads can be controlled over GSM using this paper. The PIC microcontroller takes reading from electricity meter and then displays the reading on the LCD. Reading of the electricity meter is also sent to control room by SMS through GSM modem. The desired number can be auto saved on the microcontroller by a missed call. This GSM modem also receives the instruction from any cellular phone to control electrical load. It uses a conventional electricity meter which sends output pulses to microcontroller to do counting. On receiving command microcontroller can even switch ON/OFF the load....
As the digitization is integrated into daily life, media including video and audio are heavily transferred over the Internet nowadays.\nVoice-over-Internet Protocol (VoIP), the most popular and mature technology, becomes the focus attracting many researches and\ninvestments. However, most of the existing studies focused on a one-to-one communication model in a homogeneous network,\ninstead of one-to-many broadcastingmodel among diverse embedded devices in a heterogeneous network. In this paper,we present\nthe implementation of a VoIP broadcasting service on the open sourceââ?¬â?Linphoneââ?¬â?in a heterogeneous network environment,\nincluding WiFi, 3G, and LAN networks. The proposed system featuring VoIP broadcasting over heterogeneous networks can be\nintegrated with heterogeneous agile devices, such as embedded devices or mobile phones. VoIP broadcasting over heterogeneous\nnetworks can be integrated into modern smartphones or other embedded devices; thus when users run in a traditional AM/FM\nsignal unreachable area, they still can receive the broadcast voice through the IP network. Also, comprehensive evaluations are\nconducted to verify the effectiveness of the proposed implementation...
Way-prediction (WP) caches have advantages of reducing power consumption and latency for highly associative\ndata caches and thus are favorable for embedded systems. In this paper, we propose an enhanced way-prediction\ncache, dual-access way-prediction (DAWP) cache, to cope with the weakness of the WP cache. The prediction logic\ndesigned for the DAWP cache contains a scaled index table, a global history register, and a fully associative cache\nto achieve higher prediction accuracy, which eventually yields less energy consumption and latency. In our practice,\nperformance measurement is done with a simulation model, which is implemented with SimpleScalar and CACTI,\nand nine SPEC2000 benchmark programs. Our experimental results show that the proposed DAWP cache is highly\nefficient in power and latency for highly associative cache structures. The efficiency is increased with the increasing\nassociativity, and the testing results with 64 KB cache show that the DAWP cache achieves 16.45% ~ 75.85% power\ngain and 4.91% ~ 26.96% latency gain for 2-way ~ 32-way structures, respectively. It is also observed that the random\nreplacement policy yields better efficiency in power and latency than the LRU (least recently used) policy with the\nDAWP cache....
In this modern era security of the vehicle plays important role in everyone’s day to day life. Our motto is to use the wireless technology effectively in the automotive environments by using the GSM Modem used in sending SMS in case of theft intimation. The main aim of this paper is to stop the engine of an automobile automatically, this can be done whenever a person try’s to steal automobile, at that time GSM modem sends an interrupt to a programmable microcontroller of 8051 families that stores owner’s number upon a miss call for the first time. The owner receives an SMS that his car is being stolen and then the owner sends back the SMS to the GSM modem to ‘stop’, the vehicle will be stopped. The microcontroller receives the control instructions through the interface, the output from which activates a relay driver which trips the relay that disconnects automobile ignition that results in stopping the vehicle....
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