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Journal receives papers in continuous flow and we will consider articles from a wide range of Information Technology disciplines encompassing the most basic research to the most innovative technologies. Please submit your papers electronically to our submission system at http://jatit.org/submit_paper.php in an MSWord, Pdf or compatible format so that they may be evaluated for publication in the upcoming issue. This journal uses a blinded review process; please remember to include all your personal identifiable information in the manuscript before submitting it for review, we will edit the necessary information at our side. Submissions to JATIT should be full research / review papers (properly indicated below main title).

Journal of Theoretical and Applied Information Technology
May 2013 | Vol. 51 No.3

Title:	A 10-BIT 50-MS/S LOW-POWER PIPELINE ADC FOR WIMAX/LTE
Author:	ZHZO-XIN XIONG, MIN CAI
Abstract:	A low-power 10-bit 50-MS/s pipeline analog-to-digital converter (ADC) is described in this paper. The downscaling along the pipeline chain decreases the power and area consumption without sacrificing the performance of this converter, and a low power on-chip reference circuit is also helping to reduce power consumption. To improve sampling accuracy of the sub-ADC and minimize the offset of comparator, Digital Error Logic (DEL) is used. The ADC is implemented in a standard 0.13-μm CMOS technology and occupies an active die area of 0.6 mm2. The differential and integral nonlinearity of the ADC are less than 0.27 LSB and 0.63 LSB, respectively. The ADC achieves 8.84 effective number of bits at full sampling rate with a 1-MHz input and consumes 50-mW from a 2.5-V supply.
Keywords:	Pipeline ADC, Transceiver, switched capacitor, WiMAX/LTE
Source:	Journal of Theoretical and Applied Information Technology May 2013 -- Vol. 51. No. 3 -- 2013
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Title:	HETEROGENEOUS INFORMATION INTEGRITY FOR CHINESE MINORITIES WITHIN CLOUD COMPUTING PLATFORM
Author:	LIRONG QIU
Abstract:	The minority information resources’ construction is an important part of national information construction in China. The heterogeneous distributed data semantic integration technology within cloud computing platform, mainly focus on how to use the machine automatically analyzing, understanding and handling of user needs and heterogeneous information. In this paper, the methodology of the semantic integration and dynamic management of heterogeneous distributed data is introduced firstly. And then how to build the semantic ontology for heterogeneous information are illustrated. The technology can find the data related with “cloud application”, and then it can convert the chaotic data source to an orderly, easy-to-use source of information.
Keywords:	National Minority Information; Cloud Computing; Semantic Integration
Source:	Journal of Theoretical and Applied Information Technology May 2013 -- Vol. 51. No. 3 -- 2013
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Title:	A NEW TOPOLOGY OF THREE PHASE BUCK-BOOST INVERTER WITH BUFFER INDUCTOR
Author:	PURWADI AGUS DARWITO, SOEBAGIO, MAURIDHI HERY PURNOMO
Abstract:	The electric vehicle inverter requires an induction motor drive with a high output of voltage and current to reduce the number of batteries used and in turn to reduce the vehicle’s weight. In this paper, a new topology of a three-phase buck-boost inverter (TPBBI) with a buffer inductor (BI) is proposed. The performance of the proposed inverter topology was tested using a power simulator program. The inverter was designed with a proper component of inductors and capacitors. For a given load resistor, it was shown that the inverter can produce a sinusoidal output voltage and current with an amplification of more than three times. A simulation was also carried out in a case of an inverter loaded to three-phase induction motor with a specific torque and moment of inertia. It was demonstrated that the inverter still can produce the sinusoidal output voltage and current and can reduce the applied torque and thus a stable condition of the inverter can be maintained. The proposed inverter is suitable to be implemented for the electric vehicle.
Keywords:	Three Phase Buck-Boost Inverter (Tpbbi), Buffer Inductor (Bi), Topology, Spwm, Electric Vehicle.
Source:	Journal of Theoretical and Applied Information Technology May 2013 -- Vol. 51. No. 3 -- 2013
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Title:	ROBUST METHOD FOR CAMERA CALIBRATION WITH VARYING PARAMETERS USING HYBRID MODIFIED GENETIC SIMPLEX ALGORITHM
Author:	MERRAS MOSTAFA, NABIL ELAKKAD, ABDERRAHIM SAAIDI, ABDERRAZAK GADHI NAZIH, KHALID SATORI
Abstract:	In this paper, we present a new method of camera calibration with varying parameters by a hybrid optimization algorithm that combines simplex algorithm and the modified genetic algorithm. Comparing to traditional optimization methods, the cameras calibration with varying parameters by this approach can avoid being trapped in a local minimum and converge quickly to the optimal solution without initial estimation of the cameras parameters. Several experiments are implemented using a 3D grid characterized by these coordinates which are known, to demonstrate the validity and performance of the proposed technique. The results show that this approach is accurate and robust to single optimization methods.
Keywords:	Camera Calibration; Computer Vision; Genetic Algorithm; Simplex Method; Non-Linear Optimization
Source:	Journal of Theoretical and Applied Information Technology May 2013 -- Vol. 51. No. 3 -- 2013
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Title:	OVERVIEW ON THE STRUCTURE AND INFORMATION DIFFUSION OF THE ONLINE SOCIAL NETWORKS
Author:	GANG XU, HAI-HE JIN
Abstract:	With the rapid and widespread popularity of the WEB2.0, there are various forms of online social network with interactive features based on WEB2.0 are generating, such as Facebook, renren.com, microblog, Wikipedia, etc.. Online social network can provide people a platform unrestricted in geographical, time, resources, and position, this make it easier for people to comunicate with each other in various fields, and online social networks also have important influence on realistic society. The research on network structure and information diffusion of the online social networks is hotspot. Network structure contain the key person or ID mining ,the recommendation based on the relations. Through analysing the network structure of the nodes and key node in online social network researchers can grasp the relationship of the nodes, and that is an important mean to know the public opinions, decide network advertising strategy, find critical or important person. The study of the online social network information diffusion focus on dynamics modeling of diffusion, searching information source and portraying information diffusion path, maximizing and minimizing the information dissemination, and so on; through studying information dissemination on the online social network, people can forecast and intervention the effect of the information diffusion, which can guide information dissemination in the favorable direction. This paper reviews the network structure and information dissemination of online social network, and the two aspects of the major research methods are compared and analyzed.
Keywords:	Online Social Networks, Network Structure, Information Difussion
Source:	Journal of Theoretical and Applied Information Technology May 2013 -- Vol. 51. No. 3 -- 2013
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Title:	A SPHERICAL ELECTROSTATIC MODEL EDGE DETECTOR FOR OMNIDIRECTIONAL IMAGES
Author:	OMAR EL KADMIRI, ZAKARIA EL KADMIRI, LHOUSSAINE MASMOUDI
Abstract:	Recently, omnidirectional vision has become necessary and useful for many computer science applications, such as autonomous navigation, SLAM, video surveillance and conferencing. However the use of classical image processing tools for omnidirectional images without taking into account their special particularities leads to a lack of performance. This article presents a new gray level edge detector based on a spherical virtual electrostatic model more appropriate for omnidirectional images. Several experimental results are given to illustrate the potential of this non-gradient based approach on various images especially against noise. Confrontation to other classical methods is provided.
Keywords:	Edge detection, Omnidirectional images, Electrostatic charges model, Stereographic projection, Fram & Deutsch
Source:	Journal of Theoretical and Applied Information Technology May 2013 -- Vol. 51. No. 3 -- 2013
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Title:	UNDERWATER IMAGE ENHANCEMENT USING ADAPTIVE FILTERING FOR ENHANCED SIFT-BASED IMAGE MATCHING
Author:	PULUNG NURTANTIO ANDONO, I KETUT EDDY PURNAMA, MOCHAMAD HARIADI
Abstract:	Success of scale-invariant feature transform (SIFT) image registration is limited when attempted on camera footage taken under water. This is, largely due to the poor image quality inherent to imaging in aquatic environments. In this research we aim to overcome this shortcoming using a new method of pre-processing of true-color imagery taken under water based on the Contrast Limited Adaptive Histogram image Equalization (CLAHE) algorithm. CLAHE assumes that the distribution function of the pixel intensity values of an underwater-recorded image is dominated by Rayleigh scattering, and that the noise can be removed as a function hereof. Results showed that after applying the CLAHE image enhancement method registration success of SIFT increased by 41% compared to reference method (a straightforward contrast stretching enhancement). From the ANOVA results follows that the null hypothesis can be rejected and concluded that there is a significant difference among SIFT without enhancement, SIFT with contrast stretching and SIFT with CLAHE-Rayleigh at 5% level of significance (ANOVA, F=23.41, df=2, p-value=7.34e-09). The finding concludes that CLAHE-Rayleigh is better compared to contrast stretching. As a follow-up study, CLAHE-Rayleigh should be compared with other image enhancement techniques (or a combination of techniques ‘hybrids’) to assess their relative impact on the success of SIFT-based image matching of underwater photography.
Keywords:	CLAHE, Image Enhancement, Image Registration, Underwater Image Processing, SIFT
Source:	Journal of Theoretical and Applied Information Technology May 2013 -- Vol. 51. No. 3 -- 2013
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Title:	STEADY-STATE OF NUMERICAL MODEL AND THE DESIGN OF A WIDEBAND SEMICONDUCTOR OPTICAL AMPLIFIER USING THE FINITE DIFFERENCE METHOD
Author:	A. ELYAMANI, A. ZATNI, A. ELKAAOUACHI, A. MOUMEN, H. BOUSSETA.
Abstract:	The design of a semiconductor component such as semiconductor optical amplifiers (SOAs) necessarily needs to go through a phase of modeling which allows studying a theoretical characterization of the SOA and anticipating its reactions on the basis of the operating conditions. This will ensure a qualitative prediction of most accurate performance of the SOA. The development of a theoretical model is a multidisciplinary activity that needs engineering skills, optimization and physics. In this paper, we propose a numerical algorithm which enables the efficient implementation of the model, by the means of the finite difference method (FDM) and the rate equations. The model can be used to investigate the effects of different material and geometrical parameters on SOA characteristics. It is found that at low input optical power, the carrier density has a symmetrical spatial distribution, while at high input optical power, the carrier density spatial distribution becomes more asymmetrical. For input optical powers less than -25 dBm, the gain of the amplifier remains constant for different values of the molar fraction of arsenide and it reaches the maximum when y = 0.892. In our study, among the aspects of the importance of SOA is the use of an electrical controlled optical gate when the cavity lengths are great and the values of the molar fraction of arsenide are low. Using this model, our simulation results go in accordance with some published results for SOAs.
Keywords:	Semiconductor optical amplifier (SOA), Modeling, Finite difference method (FDM)
Source:	Journal of Theoretical and Applied Information Technology May 2013 -- Vol. 51. No. 3 -- 2013
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Title:	DYNAMIC ANALYSIS AND ATTITUDE CONTROL OF COAXIAL DUAL-ROTOR DUCTED AIRCRAFT
Author:	JIA QINGXUAN, LI TONG, CHEN GANG
Abstract:	A method of dynamic modeling and attitude control method for coaxial dual-rotor ducted aircraft is proposed. Based on aerodynamic analysis of the aircraft, the force status of the aircraft is obtained. By using the Newton-Euler equations, the dynamic model of the aircraft is built up, which is simplified to achieve a linear model at the hover state of the aircraft. Finally, the incremental PID controllers are designed to control the aircraft attitude at the hover state, which are proved efficiently to keep the aircraft attitude steady by the simulation and experiment results.
Keywords:	Coaxial Dual-rotor Ducted Aircraft; Dynamic Model; Incremental PID Controller
Source:	Journal of Theoretical and Applied Information Technology May 2013 -- Vol. 51. No. 3 -- 2013
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Title:	IT SERVICE QUALITY MANAGEMENT MODEL BASED ON SERVICE SCIENCE, MANAGEMENT AND ENGINEERING
Author:	QINGHUA ZHU, KEWEN WU, XIAOLING SUN, YUXIANG ZHAO, XIAOJIE TAN
Abstract:	The goal of Service Science, Management and Engineering (SSME) is to improve service systems through service innovation. However, current SSME infrastructure lacks a comprehensive quality management framework and the SSME research on people is limited. Users’ service expectation has increased a lot along with the development of ICT. Single organization usually cannot fulfill user’s needs comprehensively. This study first analyzes the shortcomings of current system development and quality evaluation methodologies, and points out that these methods cannot meet the requirement of cross-organizational services; then, by considering the idea of Mashup and quality management model in service ecosystem, this study proposes a theoretical architecture of service system, and a preliminary quality management model under SSME context
Keywords:	Service System, SSME, Quality Management, Mashup
Source:	Journal of Theoretical and Applied Information Technology May 2013 -- Vol. 51. No. 3 -- 2013
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Title:	COLLABORATIVE SENSING BASED WIDEBAND DETECTION IN COGNITIVE RADIO NETWORKS
Author:	XIAOFENG JIANG, XINGHUA LIU, HONGSHENG XI
Abstract:	Spectrum sensing techniques are useful to increase spectrum utilization in a cognitive radio network by sensing spectrum holes without harmful interference. The collaboration of sensing information among cognitive radio nodes can significantly increase the reliability of spectrum sensing. Due to hardware limitation, each cognitive radio node has to sense one narrowband channel at a time. Consequently, the sensing procedure consumes a lot of time to get the sufficient information. A wideband sensing method is used to reduce the time overhead. Each node only senses a small amount of linear combinations of the information of all channels, and then transmit this low dimensional detection vector to the fusion center where the information is reconstructed. As a result, the time overhead and the communication overhead are significantly reduced. Six performance measures have been observed in the system which considers the call hold and residence of both licensed users and cognitive radio nodes. The observations show that the algorithm has a good performance.
Keywords:	Collaboration, Wideband Sensing, Sparse Vector, Subspace Pursuit, Detection, False Alarm
Source:	Journal of Theoretical and Applied Information Technology May 2013 -- Vol. 51. No. 3 -- 2013
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Title:	DEVELOPMENT OF AN ACCESS MECHANISM FOR FEMTOCELL NETWORKS
Author:	MANSOUR ZUAIR
Abstract:	Femtocell is a small cellular base station installed in offices and homes that can combine internet technologies and mobile within the home [1]. The two major limitations of wireless communication are range and capacity. Cellular service is far superior in areas of high population density compared to scarcely populated areas [2]. Also it provides many benefits in terms of cost, power, capacity and scalability. However, there are many challenges in the deployment of femtocells such as network architecture, allocation of spectrum resources and the avoidance of electromagnetic interference. In this paper we simulate and develop models of one of access method to create sharing between subscribers and service operator to improve the coverage of operator and reduce the cost for subscribers.
Keywords:	Femtocell, Femtocell Access Point (FAP), Macrocell, Base Station, Open System, Closed System.
Source:	Journal of Theoretical and Applied Information Technology May 2013 -- Vol. 51. No. 3 -- 2013
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Title:	THE ADAPTIVE OUTPUT SYNCHRONIZATION OF DIFFERENT-ORDER CHAOTIC SYSTEMS
Author:	NING LI
Abstract:	In this paper, the synchronization of the outputs for the uncertain chaotic systems with different-orders is investigated. The adaptive control strategy is applied to make output of the slave system track those of the master, despite the chaotic systems with different-orders and uncertainties. The proposed controller can ensure synchronous error converges to zero. Simulation results confirm the effectiveness of the proposed method.
Keywords:	Synchronization, output-Synchronization, adaptive control, chaotic system
Source:	Journal of Theoretical and Applied Information Technology May 2013 -- Vol. 51. No. 3 -- 2013
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Title:	AN ONTOLOGY BASED APPROACH FOR DISASTER PREDICTION
Author:	YINGLONG MA, XIAO YU
Abstract:	Natural disasters are those anomalies created by the nature in the process of the Earth. The harms they have caused to human society tend to be horrifying. Almost every country will be more or less affected by natural disasters annually. In consequence, giving a fairly accurate forecast of the disaster that may happen turns into a vital part of disaster prevention. Traditional research on disasters is mainly based on classical statistical methods or expertise judgment, which is lack of semantic-driven and intelligent reasoning. In this paper, an ontology based approach for disaster prediction was put forward. As the explicit specification of a conceptualization, ontologies can achieve a certain degree of knowledge sharing and reuse, and improve the system ability of communications, interoperability and reliability. On the basis of analyzing the influencing factors and historical evolution of disasters, a domain ontology model of natural disaster in OWL ontology language was created. The hidden influencing factors or disaster chain information can be excavated by the reasoner with domain-specific rules. As a result, we built an ontology-driven disaster prediction and information system. By performing the task of typhoon prediction based on our ontology-based system, our approach can improve the intelligence level of the disaster in its management and forecast.
Keywords:	Ontology Modeling, Semantic Web, Reasoner Mechanism, Disaster Prediction, Information System
Source:	Journal of Theoretical and Applied Information Technology May 2013 -- Vol. 51. No. 3 -- 2013
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Title:	ENERGY MANAGEMENT SCHEME WITH LOAD BALANCING FOR PREEMPTIVE DYNAMIC SOURCE ROUTING PROTOCOL FOR MANET
Author:	V. RAMESH, Dr. P. SUBBAIAH
Abstract:	Energy management issues are very important in the context of ad hoc networks. Energy needs to be optimally utilized so that the nodes can perform their functionality satisfactorily. MANETs are energy constrained as most ad hoc nodes to day operate with limited battery power. So, it is important to minimize energy consumption of the entire network in order to maximize the life time of the network. In this paper we proposed load balancing method for the new on-demand routing protocol (Preemptive DSR). As per the method, the PDSR selects a route at any time based on the minimum energy availability of the routes and the energy consumption per packet of the route at that time. The Simulation results shows that PDSR has increased packet delivery ratio and decreased delay compared with existing DSR.
Keywords:	Load Balancing, MANET, DSR, PDSR, Energy Management, Overhead Reduction.
Source:	Journal of Theoretical and Applied Information Technology May 2013 -- Vol. 51. No. 3 -- 2013
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Title:	AN EFFICIENT EARTH SYSTEM SIMULATION FRAMEWORK BASED ON CCA
Author:	SHANSHAN LI, XIAOLING SUN, FUMING CHEN
Abstract:	Muti-physics coupling technologies could achieve a more real simulation for Earth system. The complexity of such simulation is a difficult problem. This paper presents an efficient Earth system simulation framework based on CCA (Common Component Architecture) which is applied in large scale scientific computing put forward recently by America. Based on such component schema, this framework could better solve the complexity and provide a “plug-and-play” simulation environment. It could integrate the distributed high performance computing resources, distributed and heterogeneous physical model resources, and finally offer a transparent science research platform for the earth science researchers, which could provide construction, management, analysis service of the muti-physics coupling simulation. A preliminary prototype framework platform was developed. A CME simulation results presented here validate the framework.
Keywords:	Muti-physics, Simulation, Framework, Earth System
Source:	Journal of Theoretical and Applied Information Technology May 2013 -- Vol. 51. No. 3 -- 2013
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Title:	THE METHOD OF NATURAL LANGUAGE UNDERSTANDING BASED ON MARCHINE LEARNING IN MOBILE GIS
Author:	JIANGFAN FENG, NAN XU
Abstract:	Human-machine interaction between natural language and GIS is an intellectualized expression of mobile GIS, which process is that extracting the syntax structure of natural language, and then translating it into the corresponding GIS instruction. However, it is not perfect that the summarized sentence patterns and its corresponding instruction in current research results and achievements. Consequently, according to existing sentence pattern library and instruction library, this paper uses Artificial Neural Network Algorithm (ANNA) based on Genetic Algorithm (GA) to rearrange existing knowledge structure which combined with machine learning methods, for the purpose of improvement the sentence pattern library and instruction library constantly, and eliminating the semantic barriers existing between unstructured spatial information in natural language and structured spatial information in GIS, then realize the human-machine interaction between users and GIS more naturally. The experiment shows that this paper can identify effectively the correct GIS instruction which corresponding the no-summarized sentence.
Keywords:	Mobile GIS, Natural Language, Machine Learning, Artificial Neural Network Algorithm (ANNA), Genetic Algorithm (GA)
Source:	Journal of Theoretical and Applied Information Technology May 2013 -- Vol. 51. No. 3 -- 2013
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Title:	INVESTIGATION OF MULTIPACTION RISK IN COAXIAL RESONATORS
Author:	XUMIN YU, XIAOHONG TANG, JUAN WANG, DAN TANG
Abstract:	Multipaction risk in a resonator differs from transmission line risk, in that the former can store energy, both frequency-dependent electric and magnetic. Multipaction threshold powers likewise differ in coaxial resonators. In this paper, an investigation on multipactor risk in different coaxial resonators is presented for the first time. Peak voltage analysis and multipaction threshold measurements of four kinds of coaxial resonators indicate that multipaction threshold in the coaxial resonator is not simply proportional to minimize gap distant and that different inner cylinders structures in the same outside cavities resonating at L band have at least 1-dB difference. Experimental results agree with the predicted characteristics.
Keywords:	Multipaction Risk,Coaxial Resonator,Resonator Filters,Threshold Powers,High Power Handing
Source:	Journal of Theoretical and Applied Information Technology May 2013 -- Vol. 51. No. 3 -- 2013
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Title:	MULTI-OBJECTIVE FUNCTION GA FOR MODAL OPTIMAL CONTROL DESIGN IN PSS AND UPFC POWER OSCILLATION DAMPING COORDINATION
Author:	SASONGKO PRAMONO HADI, RIAN FATAH MOCHAMAD, HATTA IMADUDDIEN WIENNETOU
Abstract:	This paper presents the design and simulation of controllers in power system equipped with UPFC. Each controller produce different supplementary signals, the power system stabilizer PSS signal for machine and the power oscillation damping POD signal for UPFC. A two stage lead lag compensator scheme was considered in the PSS structure. A new controller design, linear optimal control LOC associated with modal control scheme MO, is proposed in both PSS and POD design. The multi-objective GA method was used to determine the parameter controllers for both PSS and POD. The controller performances were investigated by using small disturbance to power system. The simulation results show that the presence of UPFC non POD leads to get less stability system. Appropriate PSS parameters have been determined and could enhance dynamic responses performance. Using Bryson method for weighting matrix Q, proposed LOC POD could improve system stability. The simulation results also show that system with PSS and MO POD has the best oscillation damping. The dominant eigenvalues shift and approach their real part threshold. POD controllers could give a better rotor angle response, up to 81.33% and 93.9% reduction in overshoot and settling time respectively. Both PSS and UPFC POD controller simultaneously present a positive interaction.
Keywords:	Genetics Algorithm (GA) , Modal Optimal (MO) control, power system stability, Unified Power Flow Controller (UPFC)
Source:	Journal of Theoretical and Applied Information Technology May 2013 -- Vol. 51. No. 3 -- 2013
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Title:	CONSTRUCTING AND THE RELATED KEY TECHNIQUES FOR THE SMART LOGISTICS INFORMATION PLATFORM OF YIWU PORT
Author:	XU JIAWANG, JIAO YUPING, YUAN YE
Abstract:	Based on the introductions of the concept and the future development trends of Smart Logistics, the background of constructing Smart Logistics Information Platform at Yiwu Port were analyzed, and the details of the Smart Logistics Information Platform construction were put forwarded. Finally, some key technology problems associated with the information platform construction were pointed out.
Keywords:	Smart Logistics, Internet of Things, Information Platform, Key Technology, Yiwu Port
Source:	Journal of Theoretical and Applied Information Technology May 2013 -- Vol. 51. No. 3 -- 2013
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Title:	OPTIMIZED RELIABLE AND LOAD BALANCED ROUTING PROTOCOL FOR MOBILE AD HOC NETWORKS
Author:	K.SANTHI, M. PUNITHAVALLI
Abstract:	In Dynamic Source Routing (DSR) protocol for mobile ad hoc networks (MANETs), high transmission overhead is involved since DSR header size comprises the IP addresses of all the nodes involved in the transmission of the data packet. By reducing the amount of the packets involved in routing, the DSR control overhead is reduced by most of the optimization techniques. In this paper, we develop an optimization technique for DSR to reduce the overhead during data transmission. The optimization is performed in two phases. In the first phase, the route for the data packet transmission is determined and the bloom filter is used for the estimation of the compressed source route at every node. In the second phase, before the transmission of the data packet, the related information of the transmitting intermediate node is deleted. This prevents the data packet from including all its intermediate node information on transmission, in turn maintaining the data packet size to the original size without overloading it. Thus this technique reduces the overall overhead in the network. By simulation results, we show that the proposed technique reduces the overhead and hence the energy consumption and delay.
Keywords:	Mobile Ad Hoc Networks (MANETs), Dynamic Source Routing (DSR), Overhead Reduction, Load balanced routing protocol, Caching
Source:	Journal of Theoretical and Applied Information Technology May 2013 -- Vol. 51. No. 3 -- 2013
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Title:	FUZZY LOGIC TECHNIQUE FOR GOSSIP BASED RELIABLE BROADCASTING IN MOBILE AD HOC NETWORKS
Author:	G.KALPANA, DR.M.PUNITHAVALLI
Abstract:	Gossiping is the well-organized approach for information dissemination in Mobile Adhoc Network (MANET). In Gossiping approach, the node forwards packets with the probability known as retransmission probability. This probability must be chosen appropriately and effectively which is a challenging task. In this paper, we propose a fuzzy logic technique for gossip based reliable broadcasting in Mobile Ad hoc Networks. In this technique, each node computes the node velocity, residual energy and node degree. These inputs are passed through the fuzzy system and the fuzzified inputs are fed to the rule base system. Rules are constructed based on the intuitive that the rebroadcast probability at the nodes in sparser areas should be set high and that of at the nodes in denser areas as low. The outcome of fuzzy system defines the value for retransmission probability. Through simulations, we prove the proficiency of our technique which reduces the packet loss ratio and improves the network performance.
Keywords:	Mobile Adhoc Network (MANET), fuzzy system, Gossip Based Routing
Source:	Journal of Theoretical and Applied Information Technology May 2013 -- Vol. 51. No. 3 -- 2013
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Title:	POINT CLOUD REGISTRATION FOR A NON-DEFORMABLE OBJECT USING SURFACE CURVATURE FEATURES
Author:	EKO MULYANTO YUNIARNO, MOCHAMAD HARIADI, MAURIDHI HERY PURNOMO.
Abstract:	Recently, many applications require 3D information of an object (i.e. point cloud) such as 3D image scanning, 3D surface reconstruction and etc. However many researches on point cloud registration face many challenges especially for increasing the accuracy of point cloud matching. This research employs surface curvature features in discrete surfaces. A surface curvature feature is a pointer of ridges that are invariant to rigid body transformations. In this paper, a new algorithm of point cloud registration for non deformable object is proposed. This algorithm employs surface curvature features estimated by fitting k-nearest neighbor of local point to hyperbolic paraboloid equation. The proposed algorithm is implemented with Iterative Closest Point (ICP) technique and quantitatively evaluated and compared with common techniques for point cloud registration. Experimental results demonstrate that the proposed technique approximately 63% faster and 23% more accurate than iterative closest point with angular invariant feature (ICP-AIF) registration techniques. These results are obtained by testing the proposed frame work with noise, different pose of point cloud and overlapped area.
Keywords:	Registration, Point Cloud, Surface Curvature Feature.
Source:	Journal of Theoretical and Applied Information Technology May 2013 -- Vol. 51. No. 3 -- 2013
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