Design and implementation of cooperative labyrinth discovery algorithms in multi-agent environment

2013 International Conference on Technological Advances in Electrical, Electronics and Computer Engineering, TAEECE 2013 -- 9 May 2013 through 11 May 2013 -- Konya -- 98483This research focuses on design and implementation of cooperative labyrinth discovery algorithms, specifically, discovering an unexplored maze with multiple robots working collaboratively. Solving a known maze using a single robot is straightforward. The robot looks around and memorizes the structure of the maze and it generates the solution track as a stack of consequent positions from the starting cell to the destination cell. The labyrinth discovery is known as a method of solving the maze when the wall structure is not known. There are various labyrinth discovery algorithms already implemented for a single agent but their extension to cooperating multiple agents is not straight forward and may not produce optimal solutions either. We designed and implemented single agent algorithms, namely Flood Fill (FF) and Modified Flood Fill (MFF), for multi-agent environment. In addition, a cooperative labyrinth discovery algorithm has been implemented based on the ALCKEF semantic logic. Then we compared their efficiency in theory and practice against the ideal case where agents are aware of the full maze structure. The theoretical comparison is done based on examining the time and space complexity. On the other hand, the experimental comparison examines the total cost for each of those algorithms to solve and discover the maze. © 2013 IEEE

Fine Tuning the Advanced Encryption Standard (AES)

5th International Conference on Security of Information and Networks (SIN) -- OCT 25-27, 2012 -- Malaviya Natl Inst Technol, Dept Comp Engn, Jaipur, INDIAWOS: 000312505600044The Advanced Encryption Standard has been playing a prominent role in embedded systems security for a decade after being announced by the National Institute of Standards and Technology (NIST). However, vulnerabilities have emerged, especially timing attacks, that challenges its security. This paper demonstrates the introduction of a unique diffusion and confusion scheme in Rijndael by incorporating ASCII codes manipulations using playfair ciphering into the algorithm; it is not depended on the key and input thereby making it a constant time module in AES algorithm. The concept counters possible leakages from the S-box lookups; intermediary operations (SubstituteByte, ShiftRows, MixColumns, AddRoundKey) of the AES are still applicable but it becomes impossible for cryptanalysis discovery of enciphering method and ciphertext bits. Success of cracking efforts will be beyond human patience as it avoids statistical precision, thereby curbing timing attacks.Malaviya Natl Inst Technol, Macquarie Univ, Aksaray Univ, So Fed Univ, Indian Inst Technol, Govt India, Minist Informat & Commun Technol, Project Informat Secur Educ Awareness (ISEA

Tracking Reported Vehicles in Traffic Management and Information System using Intelligent Junctions

This study highlights a security scenario involving vehicles in a Traffic Management and Information System (TMIS) network. TMIS and its nodal architecture, nicknamed Intelligent Junction (IJ), are summarized from our recent work. System design sets an example to a software architecture implementing autonomous semantic agents through semantic web services, junction-based sensor networks, local- and wide-area networking through wire/wireless integrated communication infrastructure. It is so construed as to provide (near-) real-time services throughout the network. This introduction is with reference to the SOA of Cooperative Labyrinth Discovery Robotics and Traffic Management and Information System Projects. This also takes up several issues including real-time goal-oriented coordination of semantic web services. Especially described are its essential functions crucial to aid security applications. A security scenario concerning tracking and routing reported, say missing, vehicles is considered and shown how to graft it onto TMIS network. Simulation results show promising outcomes. Performance of the system in terms of mean response time is analytically derived. Simulation and analytical results agree. Research involving similar development base is suggested

Tracking Reported Vehicles in Traffic Management and Information System using Intelligent Junctions

This study highlights a security scenario involving vehicles in a Traffic Management and Information System (TMIS) network. TMIS and its nodal architecture, nicknamed Intelligent Junction (IJ), are summarized from our recent work. System design sets an example to a software architecture implementing autonomous semantic agents through semantic web services, junction-based sensor networks, local- and wide-area networking through wire/wireless integrated communication infrastructure. It is so construed as to provide (near-) real-time services throughout the network. This introduction is with reference to the SOA of Cooperative Labyrinth Discovery Robotics and Traffic Management and Information System Projects. This also takes up several issues including realtime goal-oriented coordination of semantic web services. Especially described are its essential functions crucial to aid security applications. A security scenario concerning tracking and routing reported, say missing, vehicles is considered and shown how to graft it onto TMIS network. Simulation results show promising outcomes. Performance of the system in terms of mean response time is analytically derived. Simulation and analytical results agree. Research involving similar development base is suggested

Reliability of new software in measuring cervical multifidus diameters and shoulder muscle strength in a synchronized way; an ultrasonographic study

OBJECTIVES: This study was conducted with the purpose of evaluating the inter-session reliability of new software to measure the diameters of the cervical multifidus muscle (CMM), both at rest and during isometric contractions of the shoulder abductors in subjects with neck pain and in healthy individuals.METHOD: In the present study, the reliability of measuring the diameters of the CMM with the Sonosynch software was evaluated by using 24 participants, including 12 subjects with chronic neck pain and 12 healthy individuals. The anterior-posterior diameter (APD) and the lateral diameter (LD) of the CMM were measured in a resting state and then repeated during isometric contraction of the shoulder abductors. Measurements were taken on separate occasions 3 to 7 days apart in order to determine inter-session reliability. Intraclass correlation coefficient (ICC), standard error of measurement (SEM), and smallest detectable difference (SDD) were used to evaluate the relative and absolute reliability, respectively.RESULTS: The Sonosynch software has shown to be highly reliable in measuring the diameters of the CMM both in healthy subjects and in those with neck pain. The ICCs 95% CI for APD ranged from 0.84 to 0.94 in subjects with neck pain and from 0.86 to 0.94 in healthy subjects. For LD, the ICC 95% CI ranged from 0.64 to 0.95 in subjects with neck pain and from 0.82 to 0.92 in healthy subjects.CONCLUSIONS: Ultrasonographic measurement of the diameters of the CMM using Sonosynch has proved to be reliable especially for APD in healthy subjects as well as subjects with neck pain