INTERNATIONAL CONFERENCE ON RESEARCH IN ELECTRICAL AND COMPUTER ENGINEERING | Year:2016 | دوره:1 |Papers Count:6

IN THE FUTURE, CLOUD COMPUTING WILL BECOME AN IMPORTANT TECHNOLOGY IN THE DEVELOPMENT OF INTERNET SERVICES. DUE TO THE GROWING DEMANDS OF CLOUD INFRASTRUCTURE, ENERGY CONSUMPTION IN DATA CENTERS HAS INCREASED THAT THIS IS A SIGNIFICANT PROBLEM. HIGH ENERGY CONSUMPTION NOT ONLY LEADS TO INCREASE OPERATING COSTS AND DECREASE PROFITS PROVIDERS BUT EMISSIONS OF CARBON LEAD TO NOT BE GOOD FOR THE ENVIRONMENT. MUCH RESEARCH HAS SUGGESTED DATA CENTERS WITH HIGH ENERGY EFFICIENCY AND TECHNIQUES USE SUCH AS VIRTUALIZATION AND TASK CONSOLIDATION. THIS APPROACH LEADS TO SIGNIFICANTLY REDUCED ENERGY CONSUMPTION OF DATA CENTERS.TASK CONSOLIDATION WAY TO INCREASE THE USE OF CLOUD COMPUTING RESOURCES. INCREASING USE PROVIDE BENEFITS SUCH AS CONSTRUCTION IT SERVICE PROVIDES AND QUALITY ASSURANCE SERVICES. THE MAIN PURPOSE REMAINS TO MAXIMIZE RESOURCE UTILIZATION AND ULTIMATELY TO MINIMIZE ENERGY CONSUMPTION. IN THIS STUDY, WE TRIED TO INTEGRATE TASK CONSOLIDATION ALGORITHMS OF ETC AND ECTC ENERGY CONSUMPTION AND TOTAL EXECUTION TASKS. SIMULATION RESULTS SHOW THAT ENERGY CONSUMPTION OF EPTC ALGORITHM RATHER THAN BI-OBJECTIVE ALGORITHM 30% AND TIME TO COMPLETE TASKS 28% IMPROVED.

ONE OF THE MAIN GRAPH ALGORITHMIC PROBLEMS IS TRAVELLING SALESMAN PROBLEM (TSP). THIS PROBLEM IS ONE OF THE NP-HARD OPTIMIZATION PROBLEMS THAT HAS NO CALCULATING SOLUTION AND MAYBE THERE’S NO EXACT SOLUTION IN POLYNOMINAL TIME. THE GOAL OF TSP IS ACHIEVING THE SHORTEST PATH AMONG A COLLECTION OF CITIES, SO THAT EACH CITY IS VISITED JUST ONCE IN THE PATH AND CONSTRUCTED PATH LEADS TO THE FIRST CITY. IN THIS ARTICLE, FOR SOLVING TSP, ARTIFICIAL BEE COLONY (ABC) AND GENETIC ALGORITHM (GA) WERE COMBINED, WE COMPARED IT WITH GA AND ABC ALGORITHMS.

MOBILE IP IS A PROTOCOL TO SUPPORT THE MOBILITY OF A HOST, CHANGING ITS POINT OF ATTACHMENT TO THE INTERNET. THIS PROTOCOL INTRODUCES DIFFERENT MECHANISMS, TO SUCCESSFULLY ROUTE PACKETS DESTINED TO THE MOBILE NODE [5]. BUT, SOME OF THESE INTRODUCED MECHANISMS SUFFER FROM THE LACK OF PROPER EFFICIENCY. ONE OF THESE MECHANISMS IS TRIANGLE ROUTING. IN THIS METHOD; PACKETS ARE ROUTED TO THE HOME NETWORK OF MN AND THEN TUNNELED TO MOBILE NODE (MN) BY HOME AGENT (HA) [1]. THIS INDIRECT ROUTING IS FAR FROM OPTIMAL, BECAUSE OF THE EXISTENCE OF GREAT DELAY IN DELIVERY OF THE PACKETS TO MN. ROUTE OPTIMIZATION IS A PROTOCOL TO OVERCOME DELAY IN TRIANGLE ROUTING. IN ROUTE OPTIMIZATION, MN INFORMS CORRESPONDENT NODE (CN) WITH ITS CURRENT LOCATION AND THEN, THE PACKETS ARE DIRECTLY SENT TO MN BY CORRESPONDENT NODE [1], [4]. IN THIS SIMULATION, WE HAVE COMPARED LINEAR AND STAR TOPOLOGIES WITH & WITHOUT ROUTE OPTIMIZATION. WE HAVE USED NETWORK SIMULATOR (NS) AND MOBIWAN, TO VERIFY SIMULATION RESULTS [2], [3]. IT IS NOTICEABLE THAT, DIFFERENT SIMULATIONS REGARDING DELAY PERFORMANCE OF ROUTE OPTIMIZATION, HAVE BEEN DONE BY DIFFERENT GROUPS, BUT MOST OF THEM HAVE USED UNREAL TOPOLOGY MODELS. TOPOLOGY MODEL HAS IMPORTANT EFFECTS ON RESULTS OF THE SIMULATION. GT-ITM MODEL HAS BEEN USED IN OUR TOPOLOGIES FOR HAVING A BETTER JUDGMENT ON PERFORMANCE OF ROUTE OPTIMIZATION. FEATURES OF THIS MODEL WILL BE DISCUSSED IN THIS PAPER [6]. BY EVALUATING THE RESULTS OF THE SIMULATION, WE FOUND THAT, JITTER IS NOT JUST THE FUNCTION OF ROUTE OPTIMIZATION. THE STRUCTURE OF TOPOLOGY ALSO, HAS SOME IMPORTANT EFFECTS ON IT. FINALLY WE CONCLUDED THAT, ROUTE OPTIMIZATION STRATEGIES IN STAR TOPOLOGY, REDUCES JITTER, BUT THE SAME STRATEGIES IN LINEAR MODEL INCREASE JITTER. NOTE THAT ROUTE OPTIMIZATION IMPROVES DELAY, REGARDLESS OF THE TOPOLOGY USED.

IN RECENT YEARS, WITH THE DEVELOPMENT OF PERVASIVE COMPUTING, SMART HOME IS WIDELY CONSIDERED TO FACILITATE HUMAN LIFE. ONE OF THE OBJECTIVES OF SMART HOME DESIGN HAS BEEN TO HELP THE USER TO REMOTELY CONTROL THE HOME DEVICES. AS THE USE OF SMART HOME NETWORKS BECOMES MORE COMMON, HOWEVER, THE SECURITY AND CONFIDENTIALITY OF THE INFORMATION, AS WELL AS SECURE COMMUNICATION BETWEEN HOME DEVICES ARE IMPORTANT ISSUES FOR SMART HOMES WHICH IN TURN, WILL AFFECT THEIR DEVELOPMENT AND STABILITY. CONSIDERING THE COMPUTATIONAL LIMITATIONS OF THESE DEVICES, USING SIMPLE COMMUNICATION PROTOCOLS IS ESSENTIAL. OBSERVING SMART GRID AND SMART HOME FROM AN INTEGRATED PERSPECTIVE PRESENTS BENEFITS FOR BOTH SYSTEMS. IN THIS PAPER, WE PROPOSE A SECURE SCHEME FOR INTEGRATING THE 6LOWPAN AND COAP-BASED SMART HOME NETWORKS WITH CLOUD OF THINGS (COT) THAT EMERGED IN ORDER TO INTEGRATE CLOUD COMPUTING AND THE INTERNET OF THINGS (IOT). SPECIFICALLY, IT SHOWS HOW THE SECURITY REQUIREMENTS ARE HANDLED FROM THE COT. WE ALSO PRESENT A SECURITY ANALYSIS OF OUR SCHEME FOR ENSURING SECURE COMMUNICATIONS IN SMART HOMES.

DETECTING THE PRESENCE, CONCENTRATION AND THE RATIO OF GASES, AS WELL AS THE STANDARDIZATION OF GAS TRANSFER ESPECIALLY METHANE IS IMPORTANT FOR VARIOUS REASONS SUCH AS LIFE THREATENING RISKS FOR PEOPLE WHO ARE EXPOSED TO THIS GAS AND MANY WAYS TO MEASURE THIS GAS ARE PROPOSED AND IMPLEMENTED. AMONG THE VARIETY OF PROPOSED CONTACT AND NON-CONTACT SENSORS (REMOTE), CONTACT SENSORS FOR REASONS SUCH AS DELAY OR SHORT LIFELONG WHICH IS MAINLY DUE TO THE ESTABLISHMENT OF CHEMICAL BONDS ARE RESTRICTED IN APPLICATION. HOWEVER, THESE PROBLEMS ARE SOLVED IN NON-CONTACT SENSORS, YET THE USE OF THIS TYPE OF SENSOR NEED COMPLEX ELECTRONIC CIRCUITS.THIS ARTICLE USES CARBON MONOXIDE GAS LASER, PROVIDED A NEW MODEL FOR MEASURING METHANE. RESULTS INDICATED THE SUCCESS OF THE MODEL WITH THE ACCURACY OF 5PPM AND TIME LESS THAN 1.4 SECONDS.

CONSIDERING THE NEED FOR COOLING SYSTEMS, THE GEOGRAPHICAL LOCATION OF IRAN WITH VERY HOT CITIES, AND EXHAUSTIBLE FOSSIL FUELS, IT IS NECESSARY TO DESIGN AND MANUFACTURE A COOLING SYSTEM THAT CAN OPERATE USING RENEWABLE ENERGIES SUCH AS SOLAR ENERGY. THE DESIGNED SYSTEM IS COMPOSED OF SEVERAL SECTORS INCLUDING ELECTRONICS AND CONTROL CIRCUITS, PHOTOVOLTAIC SYSTEM, ABSORPTION COOLING SYSTEM, AND PARABOLIC SOLAR FURNACE. WHAT MAKES THIS SYSTEM DISTINGUISHED FROM OTHER SYSTEMS EVER MADE IS ELECTRONIC AND CONTROL CIRCUITS AND UTILIZING 100% OF THE SOLAR ENERGY. ACCORDING TO THE RESULTS, THE FINAL PRICE OF A SPLIT AIR CONDITIONER OPERATING WITH SOLAR ENERGY WHICH CAN COOL DOWN A ROOM WITH DIMENSIONS OF 3×4×2.40 METERS IN 1 MIN AND 50 S FROM 35OC TO 21OC WILL BE 95, 880, 000 IRRS. IF SUCH A SYSTEM COOLS DOWN SUCH A ROOM IN 3 MIN, THE PRICE WILL BE 36, 720, 000 IRRS. THEREFORE, CONSIDERING THE FINAL PRICE, WE CAN NEGLECT THE TIME SPENT TO REACH THE OPTIMUM TEMPERATURE.