• Corrosion Science and Technology
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• v.4 no.4
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• pp.164-170
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• 2005

Pipelines have the highest capacity and are the safest and the least environmentally disruptive means for transmitting gas or oil. Recently, failures due to corrosion defects have become a major concern in maintaining pipeline integrity. A number of solutions have been developed for the assessment of remaining strength of corroded pipelines. In this paper, a Fitness-For-Purpose(FFP) type limit load solution for corroded city gas pipelines is proposed. For this purpose, a series of burst tests with various types of machined defects were performed. Finite element simulations were carried out to derive an appropriate failure criterion. Based on such solution along with existing solutions, an integrity evaluation program for corroded city gas pipeline, COPAP-CITY, has been developed.

• Journal of Gastric Cancer
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• v.18 no.3
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• pp.230-241
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• 2018

Purpose: Enhanced recovery after surgery (ERAS) protocols for gastric cancer patients have shown improved outcomes in Asia. However, data on gastric cancer ERAS (GCERAS) programs in the United States are sparse. The purpose of this study was to compare perioperative outcomes before and after implementation of an GC-ERAS protocol at a National Comprehensive Cancer Center in the United States. Materials and Methods: We reviewed medical records of patients surgically treated for gastric cancer with curative intent from January 2012 to October 2016 and compared the GC-ERAS group (November 1, 2015-October 1, 2016) with the historical control (HC) group (January 1, 2012-October 31, 2015). Propensity score matching was used to adjust for age, sex, number of comorbidities, body mass index, stage of disease, and distal versus total gastrectomy. Results: Of a total of 95 identified patients, matching analysis resulted in 20 and 40 patients in the GC-ERAS and HC groups, respectively. Lower rates of nasogastric tube (35% vs. 100%, P<0.001) and intraabdominal drain placement (25% vs. 85%, P<0.001), faster advancement of diet (P<0.001), and shorter length of hospital stay (5.5 vs. 7.8 days, P=0.01) were observed in the GC-ERAS group than in the HC group. The GC-ERAS group showed a trend toward increased use of minimally invasive surgery (P=0.06). There were similar complication and 30-day readmission rates between the two groups (P=0.57 and P=0.66, respectively). Conclusions: The implementation of a GC-ERAS protocol significantly improved perioperative outcomes in a western cancer center. This finding warrants further prospective investigation.

• Journal of Convergence for Information Technology
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• v.9 no.11
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• pp.1-7
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• 2019

Jeju City is one of the cities where decline of old city-center is appearing due to the reduction of residential and floating population. The decline of old city-center of Jeju City has been on the rise since the 1990s, and has been intensifying in the 2000s. Jeju City is currently activating specific policies to ensure activation and diversification of the local commercial area. In this paper, we propose a new method to increase the number of visitors to Jeju-Mokkwana by using Augmented Reality technology for activating commerce of old city-center. Various Augmented Reality contents based on smart-phone are implemented and operated in Jeju-Mokkwana. Also the survey is conducted to 574 visitors who have experienced online/offline promotion for analyzing effects. Survey results show that the proposed method can be effectively used to activate the old city-center by increasing the floating population.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.11 no.2
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• pp.576-583
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• 2010

U-City includes various information devices and network techniques, which connect among several information devices. Integrated Management Center, which is the core element of u-City, is designed to manage all services of u-City and carry out the control function for a city. Accordingly, u-City needs the methods of user authentication and security, so these methods must be implemented to integrated management center. This paper is devoted to describe some conventional authentication techniques, and authentication methods and procedures that may be available to u-City network context. Proposed u-City integrated authentication model assigns IP to only right user after authenticating information terminals and users in u-City and authorizes users according to the policy, so this model plays an important role for the security of integrated management center.

• Journal of the Korean Association of Geographic Information Studies
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• v.10 no.1
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• pp.205-217
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• 2007

Donut phenomenon of city centers has resulted from the decreasing residential population and the fluid population with curved commercial function, but the analysis can bring other problems owing to the simplified method. And As the survey and the analysis the research can offer the characteristic methods for regeneration in the city of Busan. To figure out the functional regions of city center the research has analyzed 15 Dongs in city center of the three years of 1996, 2000 and 2004 to find out the donut phenomenon and the regeneration of city center. The survey has chosen 20 variation factors using factor analysis and cluster analysis. Major factors in each year are shown 3 factors, presenting 84.2%, 87.1% and 85.5% of the accumulated explanation rate. These factors explain residential centered, commercial centered, and management centered factor. The results are as following. First, it is necessary to plan the regeneration of the total city center owing to the total donut phenomenon regarding the functions. Second, the methods to regenerate city centers should be established according to the various regional characterizations.

• Korean Journal of Health Education and Promotion
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• v.24 no.3
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• pp.119-128
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• 2007

The purpose of this study is to develop Web database for healthy city that contains healthy city indicators for making city health plans, setting project priorities, monitoring projects, and evaluating healthy city projects, effectively. Using Delphi survey method for identifying indicator domains and indicators, we extracted nine domains with thirty-four healthy city indicators. Based on the appraisals of DB users about the contents of DB, a web database for healthy city Wonju was constructed. We developed a web database system for the purposes of sharing high quality health related data for managing and evaluating healthy city projects. The web database currently provides variety data in the web address, http://healthycity.wonju.go.kr/index.html. The web DB comprised with major healthy city indicators that are the most important indicators, healthy city indicator data that have a variety data set for encompassing all domain areas such as city infrastructure, health medicine, economies, and all other related areas and qualitative data that contains policy reports, research results, healthy city information and all other tips. A database of healthy city is very essential and important because it makes healthy city projects alive by managing and sharing healthy city related data effectively. But we need to fill out some blank cells in DB because there are currently unavailable data for some indicators. In conclusion, we expect the web DB contributes information sharing of healthy city project teams and improving healthy city project quality at Wonju city in Korea.

• Journal of Korean Library and Information Science Society
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• v.51 no.4
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• pp.157-183
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• 2020

This study was a basic study for the establishment of basic policies for the operation of Sejong City Library. It was intended to establish and operate the functions and roles of Sejong City Library by conducting a general survey on the current status, user demand, expert opinion, and librarian opinion survey. As a result, the Sejong City Library is the representative library of Sejong Special Self-Governing City, which oversees all public and small libraries in Sejong Special Self-Governing City and carries out support and cooperation projects, and should improve the development of the local community and the quality of life of local residents by providing more convenient and equal access to provide information services and cultural programs. Second, apart from providing library services to local residents in Sejong Special Self-Governing City, the functions of the Sejong Special Self-Governing City's representative library and hub library, knowledge and information center, lifelong education center, social and cultural center, leisure culture center, leisure and convenience center, and furthermore, it should function as a policy information support center. Finally, in order to enhance the brand value of Sejong City Library, the Sejong City Library as a landmark in Sejong area, the Sejong City Library as an art and cultural hub in Sejong area, the Sejong City Library as a complex cultural space in Sejong area, and the Sejong City Library as a center for Sejong Studies were proposed.

• Convergence Security Journal
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• v.12 no.1
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• pp.43-48
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• 2012

In this paper, the requirements for information security are presented in the ubiquitous ecological(u-Eco) city. The various definition of ubiquitous city is analyzed first, the concept of the u-Eco City, services and major projects are then presented. The framework of the integrated operating center for u-Eco city is proposed, the privacy, data security and network facility protection in the center are analyzed. Unlike to previously proposed security algorithms, the light-weight encoding algorithms(such as block/stream encoding, pseudo-random generator, hash function, and public key encoding) in the u-Eco city center are required to communicate the information in the ubiquitous sensor network. Furthermore, the principal policies guaranteeing the secrecy and authentication for the private information are also presented.

• Spatial Information Research
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• v.17 no.1
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• pp.15-23
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• 2009

For the development and management of u-City(ubiquitous city), Ubiquitous City Construction Law was enacted(March 3, 2008) to form the legal basis of u-City plan, construction and managements afterwards. Among u-City elements, the u-City Management Center has its own meaning and importance in roles which are crucial to the u-City developments, and its legal establishment is one of the core u-City realization factors. In spite of its crucial position for u-City, the legal arrangement of its basis concept, physical/systematic structures, and managerial finance sources and their standardizations are very immature. Therefore, the purpose of this study is to analyse its overall problem issues and then to suggest the basic directions and enforcement strategies to form its legal basis.

• The Journal of Society for e-Business Studies
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• v.15 no.2
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• pp.167-189
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• 2010

As adopting ubiquitous technology into civil engineering, new city model is suggested called U-City. This paper proposes the framework of U-City management center to support effective services operation. The aims of the framework are to provide the development and operation environment for U-City services. Basically, these objectives are achieved by adopting the semantic web service technology to the framework. In this paper, OWL-S is mainly conducted to represent the description of U-City services. In addition, this paper insists that fine grained unit services are required to guarantee reusability, compatibility, and scalability of the services on U-City management center. The documentations conducted by OWL-S are provided as an example of service descriptions. At the last section, this paper also presents the architecture of U-City management center which enables automatic service discovery, selection, composition and interoperation.