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Publisher: Redfame Publishing   (Total: 7 journals)   [Sort by number of followers]

Showing 1 - 7 of 7 Journals sorted alphabetically
Applied Economics and Finance     Open Access   (Followers: 8)
Applied Finance and Accounting     Open Access   (Followers: 5)
Business and Management Studies     Open Access   (Followers: 9)
Intl. J. of Social Science Studies     Open Access   (Followers: 13)
J. of Education and Training Studies     Open Access   (Followers: 1)
Studies in Engineering and Technology     Open Access  
Studies in Media and Communication     Open Access   (Followers: 12)
Journal Cover Studies in Engineering and Technology
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  This is an Open Access Journal Open Access journal
   ISSN (Print) 2330-2038 - ISSN (Online) 2330-2046
   Published by Redfame Publishing Homepage  [7 journals]
  • A Genetic Algorithm-based Framework for Soft Handoff Optimization in
           Wireless Networks

    • Authors: Daniel E. Asuquo, Samuel A. Robinson
      Pages: 1 - 14
      Abstract: In this paper, a genetic algorithm (GA)-based approach is used to evaluate the probability of successful handoff in heterogeneous wireless networks (HWNs) so as to increase capacity and network performance. The traditional handoff schemes are prone to ping pong and corner effects and developing an optimized handoff scheme for seamless, faster, and less power consuming handoff decision is challenging. The GA scheme can effectively optimize soft handoff decision by selecting the best fit network for the mobile terminal (MT) considering quality of service (QoS) requirements, network parameters and user’s preference in terms of cost of different attachment points for the MT. The robustness and ability to determine global optima for any function using crossover and mutation operations makes GA a promising solution. The developed optimization framework was simulated in Matrix Laboratory (MATLAB) software using MATLAB’s optima tool and results show that an optimal MT attachment point is the one with the highest handoff success probability value which determines direction for successful handoff in HWN environment. The system maintained a 90%  with 4 channels and more while a 75% was obtained even at high traffic intensity.
      PubDate: 2017-08-11
      DOI: 10.11114/set.v5i1.2590
      Issue No: Vol. 5, No. 1 (2017)
       
  • Simulation on Occupant Evacuation at a Public Site Based on SMARTFIRE and
           Building EXODUS

    • Authors: D. L. Zhao, Q. Zhang, P. C. Liu, M. J. Sun, X. Q. Wang, X. L. Zhang, X. Wang
      Pages: 15 - 24
      Abstract: In this paper, the software of SMARTFIRE is applied to simulation a fire process at a long-distance passenger transport station. The results of SMARTFIRE can be used as environment condition of occupant evacuation. The software of Building EXODUS is applied to simulation the evacuation process with and without fire. Evacuation times with different number of occupants are calculated. If the density of occupants is relatively small, pedestrian flow during evacuation can take on a dilute state because of the large quantity of exits on public site. And evacuation time changes a little with the increase of the number of occupants in low range of density. If the density of occupants is comparatively big, the phenomena of queuing up at the exits and assembling at the bottlenecks will take place, resulting in an obviously long evacuation time; The influences of the use ratios of exit are analyzed, and balancing the use ratio of each exit can obviously improve the efficiency of evacuation; The influences of the fire simulated by SMARTFIRE are also analyzed. In addition to the factors of low visibility and low walking speed, the change of evacuation routes and the imbalance of the use ratio of each exit are also very important factors of fire.
      PubDate: 2017-08-29
      DOI: 10.11114/set.v5i1.2627
      Issue No: Vol. 5, No. 1 (2017)
       
 
 
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