Kye-Dong Jung

Improvement on LEACH protocol of a wide-area wireless sensor network

This paper proposes to increase the efficiency energy of nodes which rapidly drops during the transmission of the LEACH (Low Energy Adaptive Clustering Hierarchy), using the method of the dual-hop layered in the sensor field. By introducing dual-hop method in the data transmission, the proposed single-hop method for short-range transmission and multi-hop transmission method between the cluster heads for remote transmission was introduce. By introducing a partial multi-hop method in the data transmission, a single-hop method for short range transmission method between the cluster heads for remote transmission was introduces. In the proposed DL-LEACH, the energy consumption of cluster head for remote transmission reduces and increases the energy efficiency of sensor node by reducing the transmission distance and simplifying the transmission routine for short-range transmission. As compared the general LEACH, it was adapted to a wider sensor field.

Improving the Energy Efficiency of a Cluster Head Election for Wireless Sensor Networks

Sensor Networks can perceive the extensive area by applying many sensor nodes because the size of sensor nodes is relatively small and cheap. Sensor nodes can transfer multi-hop data to sink nodes which are far away than sending and receiving distance. Generally sensor nodes are composed of a large size so it is difficult that much capacity is loaded on nodes. Many routing methods are proposed in order to raise energy efficiency in sensor networks field. There is a routing method based on structure as a composing method of network by cluster. Cluster technology consisting and maintaining network topology based on cluster is mostly studied in routing protocol. There are demerits that LEACH, EACHS shall be rest energy of all nodes and HEED does not guarantee the number of cluster head. Proposed energy efficiency of selected cluster head guarantees the number of cluster head which is a demerit of HEED and minimizes the node of DEAD.

Improving adaptive cluster head selection of teen protocol using fuzzy logic for WMSN

In this paper, we proposed the clustering algorithm using fuzzy inference system for improving adaptability the cluster head selection of TEEN for the wireless multimedia sensor network. The stochastic selection method cannot guarantee available of cluster head. Furthermore, as the formation of clusters is not optimized, the network lifetime is impeded. To improve this problem, we propose the algorithm that gathers attributes of sensor node to evaluate probability to be cluster head.

A study of row-direction reconstruction algorithm in depth map

In this paper, a row-direction reconstruction algorithm is proposed to recover the lost depth information from a monocular image. The depth of objects in an image is usually determined by the depth of the bottom area of objects. Therefore, using the relationship between the upper and lower areas, a depth map is reconstructed for processing in the row-direction. The relationship is expressed using the energy function and this function is used to estimate the depth. Because the energy function is defined from the various depth cues, the algorithm can be applied to various images. The objective effectiveness of the algorithm is shown using PSNR.

Method of Extended Input/Output Linearization for the Time-Varying Nonlinear System

In this thesis, the method of input-output linearization for the time-varying nonlinear system is discussed. To this end, the proposed linearization technique of existing research has been extended to nonlinear systems. The suggested technique for an extended input-output linearization method is conversed to time-invariant linear system and formulated as time-varying nonlinear system by having multiple integrators. This suggested method presented the necessary and sufficient condition and proved through examples.

The Study of Service Integration using Ontology-based Service Association

Abstract Recently, most of computing technology is based on web. Therefore, the users register web services or needed resources, and they can find and use the registered item. These services can be used alone or can be used in combination. When the item is used in combination, the ordering and association of service is important, and an ontology that defined association of services is required. In this paper, we define association of services based on ontology, and propose a method that can be used by services integration. The proposed method provides an efficient retrieval service by compositing the ontology with the service area and data association area. Key Words : Service Integration, Service Ontology, Data Ontology, Service Association * 본 논문은 2013년 광운대학교 연구비에 의하여 지원되었음.Received 30 December 2013 , Revised 7 February 2014Accepted 20 February 2014Corresponding Author: Kye-Dong Jung(Div. of General Education Information Engineering, Kwangwoon University) Email: gdchung@kw.ac.krⒸ The Society of Digital Policy & Management. All rights reserved. This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.otg/licenses/by-nc/3.0), which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is ISSN: 1738-1916 properly cited.

Data access control method for multimedia content data sharing and security based on XMDR-DAI in mobile cloud storage

Mobile cloud storage service is used for users’ multimedia content data sharing or synchronization in effective way with several mobile devices. To save various content data in the mobile cloud storage, the matters of security should be treated in the process of data sharing to provide flexibility and expandability for solving its heterogeneousness. Currently, the cloud storage service generally encrypts the content data for the security. However, this method is not perfectly safe for it manages ID, password, and encryption key simply with software; thus it may accept unauthorized users. This research suggests the data access control model and the method for multimedia content sharing and security based on XMDR-DAI in the mobile cloud storage. It supports key management based on hardware, identification for the integrity of client software, and security key sharing. Also, the suggested model saves/manages different types of multimedia content, thus it establishes XMDR-DAI-based metadata relationship for the problems that occurred in searching to increase the reliability. And this research suggests the prototype using TPM emulator that is operated in secure world of ARM TrustZone and TrustZone environment.

XMDR-DAI-based USN multimedia MetaData management agent for sensor networks

In a ubiquitous sensor network (USN) environment, it is necessary to define and manage a single metadata between the multimedia sensor and multimedia sensor node for interoperability purposes. One method to resolve this issue is the SensorML (Sensor Model Language), which is standard language that can be applied to sensor modeling. SensorML describes the model for data processing between multimedia sensors and provides a framework that can describe the information of each sensor. In this paper, an XMDR-DAI-based USN multimedia metadata is defined to describe the application of sensor devices, sensor nodes and sensor network information. And then an agent technology is used for effective storing and search of XMDR-DAI-based USN multimedia metadata. Sensor multimedia metadata can maintain interoperability in a USN multimedia environment based on SensorML, and the metadata management system can be directly used for metadata management in USN multimedia middleware or applications.

The Comparison of Performance Hierarchical Routing Protocols in Wide Area Sensor Field

Studies have been made for the wireless sensor network protocols by a number of researchers to date. In particular, the studies as to the hierarchical protocol LEACH algorithm was concentrated. Various studies have been derived for the performance of the protocol is based on the LEACH protocol have been made. Improved algorithms have been proposed continuously. On the other hand, The performance comparison and evaluation of the improved algorithm is insufficient. Therefore, we compared the performance for the ML-LEACH (Multi Hop-Layered) and DL-LEACH (Dual Hop-Layered) been derived mainly LEACH. scalability, energy consumption, CH elected, network lifetime were selected as a Performance evaluation items.

The Design of mBodyCloud System for Sensor Information Monitoring in the Mobile Cloud Environment

Recently, introduced a cloud computing technology to the IT industry, smart phones, it has become possible connection between mobility terminal such as a tablet PC. For dissemination and popularization of movable wireless terminal, the same operation have focused on a viable mobile cloud in various terminal. Also, it evolved Wireless Sensor Network(WSN) technology, utilizing a Body Sensor Network(BSN), which research is underway to build large Ubiquitous Sensor Network(USN). BSN is based on large-scale sensor networks, it integrates the state information of the patients body, it has been the need to build a managed system. Also, by transferring the acquired sensor information to HIS(Hospital Information System), there is a need to frequently monitor the condition of the patient. Therefore, In this paper, possible sensor information exchange between terminals in a mobile cloud environment, by integrating the data obtained by the body sensor HIS and interoperable data DBaaS (DataBase as a Service) it will provide a base of mBodyCloud System. Therefore, to provide an integrated protocol to include the sensor data to a standard HL7(Health Level7) medical information data.