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Search Results: 1 - 10 of 45598 matches for " Jin-Woo Song "
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Conducting Polyaniline Nanowire and Its Applications in Chemiresistive Sensing
Edward Song,Jin-Woo Choi
Nanomaterials , 2013, DOI: 10.3390/nano3030498
Abstract: One dimensional polyaniline nanowire is an electrically conducting polymer that can be used as an active layer for sensors whose conductivity change can be used to detect chemical or biological species. In this review, the basic properties of polyaniline nanowires including chemical structures, redox chemistry, and method of synthesis are discussed. A comprehensive literature survey on chemiresistive/conductometric sensors based on polyaniline nanowires is presented and recent developments in polyaniline nanowire-based sensors are summarized. Finally, the current limitations and the future prospect of polyaniline nanowires are discussed.
Applying the Service-Profit Chain to Internet Service Businesses  [PDF]
Jin-Woo Kim, Michael Richarme
Journal of Service Science and Management (JSSM) , 2009, DOI: 10.4236/jssm.2009.22013
Abstract: Service-profit chain (SPC) is a powerful tool for evaluating the relationship between the degree of service effort and profit. This framework has been empirically tested in the banking, hospital, retail, and other brick and mortar service verticals. This paper extends the applicability of SPC to Internet-based businesses. The paper also investigates the moderating roles of customer satisfaction and advertising spending on the service operation efficiency (SOE) and profit relationship. Analysis of U.S. Internet service providers during a seven year period from 2000 to 2006 indicates that service operations efficiency is positively associated with a firm’s profit. However, the customer satisfaction and adver-tising spending constructs are negative moderators of the relationship between service operations efficiency and profit.
EFFECTIVE REPLICATED SERVER ALLOCATION ALGORITHMS IN MOBILE COMPUTING SYSTEMS
Jin-Woo Song,Kwang-Jo Lee,Taek-Hun Kim,Sung-Bong Yang
International Journal of Wireless & Mobile Networks , 2009,
Abstract: In mobile environments, mobile device users access and transfer a great deal of data through the online servers. In order to enhance users’ access speed in a wireless network, decentralizing replicated servers appropriately in the network is required. Previous work regarding this issue had focused on the placement of replicated servers along with the moving paths of the users to maximize the hit ratio. When a miss occurs, they simply ignored the file request. Therefore, we suggest a solution to take care of such a miss by sending a file request to a replicated server nearby in the network.This paper is to propose new cost-effective wireless access algorithms incorporating a present replicated server allocation algorithm with more keen analysis of the moving patterns of mobile device users. We propose four different algorithms that allocate available replicated servers in the network so as tominimize the communication costs. The experimental results show that, among the proposed algorithms, the replicated server clustering algorithm allocated replicated servers with near optimal communicationcosts.
The Community Structure of Macrozoobenthos and Its Temporal Change on the Gapo Artificial Tidal Flat in Masan Bay, Korea  [PDF]
Jin-Woo Choi, Jin-Young Seo, Soonmo An
Open Journal of Marine Science (OJMS) , 2013, DOI: 10.4236/ojms.2013.34022
Abstract:

This study was conducted to get some basic information on the community structure of macrozoobenthos and its temporal change at 3 sites on the Gapo artificial tidal flat within Masan Bay from March 2002 to April 2004 when 8 years passed after the construction. The Gapo artificial tidal flat was constructed by filling the dredged contaminated sediments of MasanBayfrom 1990 to 1993. The surface sediment consisted of fine particles, but the grain size at the tidal flat has changed from mud to muddy sand by adding coarse particles for manila clam aquaculture by local fishermen from 2002. A total of 35 faunal species including 23 species at the upper tidal flat, 28 species at the lower tidal flat and 30 species in the tidal channel were collected during the study period. Polychaete worms were the most dominant fauna in species number and total faunal density, but mollusks were the most dominant in biomass. There was a specific species composition along tidal level. At the upper tidal flat, Prionospio japonicus, Sigambra tentaculata, and Neanthes succinea were dominant and at the lower tidal flat, N. succinea, P. japonicus, Corophium sinensis, and Ruditapes philipinarum were dominant while

Improvement of resolution in 2-D gel analysis by simple pre-treatment of human urine with EDTA  [PDF]
Jin-Woo Lee, Ju-Young Lee, Jinkyu Lim
Open Journal of Clinical Diagnostics (OJCD) , 2012, DOI: 10.4236/ojcd.2012.22008
Abstract: Regardless of thermodynamic stability, less complex proteome than plasma, convenient and noninvasive sampling of urine, reproducibility and comparability of the data among laboratories are challenges for the urine proteome analysis. Pretreatment of urine with 10 mM EDTA in conjunction with desalting methods to remove interfering molecules significantly improved the presentation of urine proteome on 2-D gels. Statistical analysis of the average ratio of the spot numbers on 2-D gels between EDTA-treated and non-treated samples were 1.35 ± 0.167, 1.26 ± 0.091, and 1.24 ± 0.095 for dialysis, ultrafiltration, and desalting column, respectively, with the p-value of 5.85 × 10–6 for the overall comparison. This result came from the fact that EDTA-treated samples showed better resolutions with less streaks and clearer spots on 2-D gels than the control samples. The results suggest that a simple and non-fractionating EDTA-treatment can be employed to the procedures for the high resolution 2-D gel analysis and other urinary proteomic analysis.
Copper oxide resistive switching memory for e-textile
Jin-Woo Han,M. Meyyappan
AIP Advances , 2011, DOI: 10.1063/1.3645967
Abstract: A resistive switching memory suitable for integration into textiles is demonstrated on a copper wire network. Starting from copper wires, a Cu/CuxO/Pt sandwich structure is fabricated. The active oxide film is produced by simple thermal oxidation of Cu in atmospheric ambient. The devices display a resistance switching ratio of 102 between the high and low resistance states. The memory states are reversible and retained over 107 seconds, with the states remaining nondestructive after multiple read operations. The presented device on the wire network can potentially offer a memory for integration into smart textile.
Inkjet Printing of Carbon Nanotubes
Ryan P. Tortorich,Jin-Woo Choi
Nanomaterials , 2013, DOI: 10.3390/nano3030453
Abstract: In an attempt to give a brief introduction to carbon nanotube inkjet printing, this review paper discusses the issues that come along with preparing and printing carbon nanotube ink. Carbon nanotube inkjet printing is relatively new, but it has great potential for broad applications in flexible and printable electronics, transparent electrodes, electronic sensors, and so on due to its low cost and the extraordinary properties of carbon nanotubes. In addition to the formulation of carbon nanotube ink and its printing technologies, recent progress and achievements of carbon nanotube inkjet printing are reviewed in detail with brief discussion on the future outlook of the technology.
EAFoC: Enterprise Architecture Framework Based on Commonality
Jin-Woo Kim,Ju-Hum Kwon,Young-Gab Kim,Chee-Yang Song,Hyun-Seok Kim,Doo-Kwon Baik,
Jin-Woo Kim
,Ju-Hum Kwon,Young-Gab Kim,Chee-Yang Song,Hyun-Seok Kim,and Doo-Kwon Baik

计算机科学技术学报 , 2006,
Abstract: The recent rapid development in information systems (ISs) has resulted in a critical need for integration and interoperability between heterogeneous ISs in various domains, using specific commonalities. However, stovepipe systems have been caused due to inconsistencies in planning IS architecture among stakeholders. So far, there has been no research on an enterprise architecture framework (EAF) that can satisfy with the coefficient factors of system architecture (SA) and enterprise architecture (EA). This paper proposes a new EAF that can resolve the problems inherent in existing legacy EAFs and their features. EAFoC (Enterprise Architecture Framework based on Commonality) is based on commonality that can be satisfied as the coefficient factors in both SA and EA within a common information technology (IT) domain. Thus, it should be possible to integrate an established heterogeneous framework for each stakeholder's view. Consequently, the most important contribution of this paper is to establish the appropriate EAFoC for the development of consistent IS architecture, smooth communication among stakeholders, systematic integration management of diversified and complicated new IT technologies, interoperability among heterogeneous ISs, and reusability based on commonality with other platforms.
Development Strategy of Infrastructure Risk Assessment Based Disaster Response and Management System  [PDF]
Eun-Ho Oh, Kyoon-Tai Kim, Kyong-Hoon Kim, Jin-Man Kim, Jin-Woo Cho
World Journal of Engineering and Technology (WJET) , 2014, DOI: 10.4236/wjet.2014.23B005
Abstract:

Major infrastructures such as levee, dam, bridge, road, etc. have a significant meaning in that they are the means to support ordinary social and industrial activities and also protect human and physical assets at the occurrence of disaster. Especially, integrated risk management of SOC facilities provides the policy maker in charge of SOC facility safety and related disaster prevention with a reasonable means of decision making and ultimately contributes to improving the safety of the applicable SOC facility. Furthermore, a variety of issues raised in the Sewol ferry disaster that occurred recently in Korea, such as, a proper response method and the relevant Golden time decision making at the occurrence of disaster, rapid grasping and reporting the situation on disaster sites, management and mobilization of resources for rescue and recover, loss of integrated control tower function, etc., might occur as well in facility disaster management. As the method of solving such issues adequately, this study suggests a strategy of new disaster response and management system. The analyses of Hazus-MH (FEMA) and DIMSuS (Purdue University) were comprehensively conducted, and based on the results required functions of new disaster response system of major infrastructure and its development directions were suggested.

On Multiple Twisted -adic -Euler -Functions and -Functions
Min-Soo Kim,Taekyun Kim,Jin-Woo Son
Abstract and Applied Analysis , 2008, DOI: 10.1155/2008/793297
Abstract: We give the existence of multiple twisted -adic -Euler -functionsand -functions, which are generalization of the twisted -adic (?,)-zeta functionsand twisted -adic (?,)-Euler -functions in the work of Ozden and Simsek (2008).
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