• 한국해양공학회지
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• 제31권3호
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• pp.248-255
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• 2017

Many rivers and seas have been affected by environmental contamination. Therefore, city water supplies often require a high-degree purification treatment to provide safe drinking water. However, in order to achieve a high-degree purification treatment, a large amount of chlorine has to be added to sterilize city drinking water. The added chlorine reacts chemically with water and forms hypochlorous and chlorine ions. The hypochlorous ionizes with hypochlorous ions and hydrogen ions. As a result, the city water contains a large amount of chlorine ion. As such, when city water is used with domestic boilers, many kinds of heat exchangers, and the engines of vehicle and ships, there are often corrosion problems. In this study, alkali water was electrochemically made by electrolysis of city water, and corrosion properties between alkali and city water were investigated with an electrochemical method. Most of the chlorine ions are thought to not be contained in the alkali water because the alkali water is created in the cathodic chamber with an electrolysis process. In other words, the chlorine ion can be mostly removed by its migration from a cathodic chamber to an anodic chamber. Moreover, the alkali water also contains a large amount of hydroxide ion. The alkali water indicated relatively good corrosion resistance compared to the city water and the city water exhibited a local corrosion pattern due to the chlorine ion created by a high-degree purification treatment. In contrast, the alkali water showed a general corrosion pattern. Consequently, alkali water can be used with cooling water to inhibit local corrosion by chlorine ions in domestic boilers, various heat exchangers and the engine of ships and for structural steel in a marine structure.

• Asia Marketing Journal
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• 제13권1호
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• pp.1-26
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• 2011

도시 생활의 질에 대한 주민들의 인식은 긍정적인 도시 브랜드 이미지 형성에 기여할 뿐 아니라, 도시에 대한 만족, 신뢰, 충성도 등 도시와의 전반적 관계의 질에도 중요한 영향을 미친다. 도시 생활의 질이 도시 마케팅에 중요한 요소임에도 불구하고, 기존 측정도구들이 소도시 지역사회 중심의 커뮤니티 웰빙 측정도구들이어서, 대도시에서의 주관적 도시 생활의 질(Quality of City Life)을 측정하기 위한 측정도구가 요구되는 실정이다. 본 연구의 목적은 대도시 시민들이 인지하는 도시 생활의 질(Quality of City Life)에 관련된 측정 도구를 개발하여 도시 마케팅의 기초 자료로 활용하는데 있다. 시민들이 인지하는 도시 생활의 질이란 시민들이 도시에서의 생활을 통해 전반적으로 경험하는 욕구 만족과 행복감의 정도를 의미한다. 본 연구에서는 도시 생활의 질 측정도구를 개발하기 위해 문헌조사와 전문가 심층 인터뷰를 통해 기초문항을 도출하고, 사전 조사를 거쳐 서울시의 25구에 사는 시민 507명을 거주 구역별 할당방식에 의한 설문 조사를 실시하였다. 조사 결과 신뢰도와 개념 타당도가 있는 도시생활의 질 측정문항을 도출하였다. 도시 생활의 질 측정도구는 서울시의 서비스에 대한 만족, 서울시에 대한 신뢰, 시민 자부심 및 구전의향에 긍정적 영향을 미치는 예측 타당도를 가지는 것으로 나타났다.

• Nutrition Research and Practice
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• 제1권4호
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• pp.356-362
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• 2007

For the assessment of representative and longitudinal Zn nutriture in South Koreans, Zn, phytate and Ca intakes were determined using four consecutive years of food consumption data taken from Korean National Nutrition Survey Report (KNNSR) every 10 years during 1969-1998. The nutrient intake data are presented for large city and rural areas. Zn intake of South Koreans in both large city and rural areas was low during 1969-1988 having values between 4.5-5.6 mg/d, after then increased to 7.4 (91% Estimated Average Requirements for Koreans, EAR = 8.1 mg/d) and 6.7 mg/d (74% EAR) in 1998 in large city and rural areas, respectively. In 1968, Zn intake was unexpectedly higher in rural areas due to higher grain consumption, but since then until 1988 Zn intake was decreased and increased back in 1998. Food sources for Zn have shifted from plants to a variety of animal products. Phytate intake of South Koreans during 1969-1978 was high mainly due to the consumption of grains and soy products which are major phytate sources, but decreased in 1998. The molar ratios of phytate:Zn and millimmolar ratio of phytate${\times}$Ca:Zn were decreased due to the decreased phytate intake in South Koreans, which implies higher zinc bioavailability. The study results suggest that Zn nutriture has improved by increased dietary Zn intakes and the decreased molar ratio of phytate:Zn in South Koreans in both large city and rural areas.

• Journal of Information Technology Applications and Management
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• 제30권4호
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• pp.39-64
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• 2023

The recent expansion of large cities for economic benefits has worsened cultural inequalities within urban areas, eroding unique cultural identities and social values and deepening mistrust between regions. To tackle this, the idea of creating cultural cities is gaining traction, involving urban branding and cultural elements to foster balanced local cultural development. Current research primarily concentrates on case analysis in cultural cities, lacking sufficient studies examining the interplay of factors through empirical analysis, This study investigated whether Cultural City Formation Factors, which are resources of a cultural city, have a positive effect on City Brand Equity, City Innovativeness, Brand Personality, and Behavior Intention. For this study, questionnaires were collected from 310 people who continuously experience culture and arts in Seoul, and empirical analysis was conducted on 292 copies of them. Consequently, a significant impact was observed among the factors influencing cultural city formation, city brand equity, city innovativeness, brand personality, and behavioral intention. Moreover, it was verified that city brand equity, city innovativeness, and brand personality positively contributed to mediating effects as well as sequential mediating effects. It is expected that the results of this study will be used to establish the foundation for effective urban management and the development of strategies for creating cultural cities.

• 대한안전경영과학회지
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• 제6권2호
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• pp.23-33
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• 2004

Domestic city gas is supplying in an about 10 million household on present 34 city gas companies because is begun to supply regularly after two 1980 years middle. But, result that focus on city gas supply spread and stable supply for supply area and neglects about safety problem, hundreds casualties such as Ahyun explosion accident and Deagu city gas explosion accident were reached in situation that occurred large size calamity occurs it is dizzliness. In the case of advanced nation, can see that accomplish system and progress that in technology after experience major accident. Therefore, grasp problem investigating safety actual conditions for city gas institution and study about solvable plan is required this. Also, must guide reform and level elevation of a domestic company safety technology through induction and development of safety technology that is suitable in supply, domestic real condition etc. Must help in power positivity that is full text executing high-quality safety education about step High firing mechanism safety technology than present safety education.

• KIEAE Journal
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• 제2권4호
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• pp.49-56
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• 2002

The quality of urban environment where large population reside is becoming more vitally important than ever. Recently the city of Seoul has launched a 'green city' program converting number of city owned lots into urban parks. In this study, we first investigate four recently opened city parks with water ponds in Seoul. This study then classify these parks according to their respective designs, particularly addressing design and environmental impacts by water features. From these exercises, we derive the following interim findings: 1. Design patterns of waterscape is changing. 2. Water in the city park is a major design feature. 3. Design methodology for city parks must be studied further.

• 인터넷정보학회논문지
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• 제18권3호
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• pp.1-9
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• 2017

스마트-시티는 스마트-시티의 사물인터넷(Internet of Things: IoT) 디바이스를 비롯한 수많은 인프라를 지능적으로 관리하고, 다양한 스마트 어플리케이션을 도시민에게 제공한다. 스마트-시티에서는 스마트-시티 어플리케이션에서 필요한 다양한 정보를 제공하기 위하여 수많은 사물인터넷 기기들로부터 끊임없이 발생하는 대규모의 스트림 빅-데이터를 지능적으로 처리하는 기능이 필요하다. 하지만, 스마트-시티에서 대규모의 스트림 빅-데이터를 처리하는 것에는 실시간 처리와 관련된 제약들이 존재한다. 본 스마트-시티-사업단에서는 선행 연구에서 스마트-시티미들웨어와 이를 이용한 스트림-리즈닝 방법론 및 시스템을 개발하였다. 스마트-시티에서 스마트 서비스를 제공하기 위하여, 스마트-시티-사업단에서는 스트림-리즈닝을 사용하는 방법론을 사용한다. 이 스트림-리즈닝은 대용량 데이터의 실시간 처리를 필요로 한다. 따라서, 후속연구로서 스마트-시티미들웨어의 클라우드-컴퓨팅 플랫폼을 이용하여 스트림-리즈닝을 위한 실시간 분산병렬처리 클라우드-컴퓨팅 방법론과 시스템을 개발하였다. 본 논문에서는 스마트-시티에서 발생하는 사물인터넷 빅-데이터를 스트림-리즈닝에 사용하기 위하여 이 후속연구에서 개발된 클라우드 기반 실시간 분산병렬처리 연구결과를 소개한다. 스마트-시티의 각종 센서들로부터 전송되어지는 사물인터넷 빅-데이터를 사용하여 스트림-리즈닝하는 데 필요한 클라우드-컴퓨팅 기반의 실시간 분산처리 방법론과 시스템을 소개하고 있으며, 이 방법론을 선행연구에서 개발한 스마트-시티 미들웨어에 구현하여 실시간 분산처리 성능을 평가한 것을 소개한다.

• 대한공간정보학회지
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• 제18권1호
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• pp.119-127
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• 2010

본 연구에서는 U-City 정보를 효과적으로 관리하기 위한 기초연구로서 U-City 정보 특성을 분석하였다. 현재 논의되고 있는 U-City 서비스는 228개 정도이며, 이러한 서비스를 단기 적용 가능성, 서비스의 실용성 그리고 서비스의 공공성을 기준으로 39개의 분석대상 서비스를 선정하였다. 다음으로 선정된 서비스를 대상으로 U-City 정보흐름을 분석하고 분석결과를 토대로 U-City 정보의 특성을 도출하였다. 본 연구에서 도출한 U-City 정보의 특성은 실시간 정보, 서비스별 필수 및 선택정보, 융.복합 정보, 동적인 정보, 대용량 데이터, 사용자 맞춤형 정보, 정보보안의 취약성, 개인정보노출 및 사생활침해우려 등이다. 본 연구에서 제시한 U-City 정보의 특성은 앞에서도 언급하였듯이 U-City 정보관리 기준을 마련하기 위한 사전연구의 결과이다. 본 연구의 결과는 정부 및 지자체에서 추진하고 있는 U-City 건설에 효과적으로 활용될 수 있다. 이를 위해서는 U-City 정보의 특성을 고려한 정보관리 기준이 수립되어야 한다.

• 산업경영시스템학회지
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• 제35권3호
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• pp.1-6
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• 2012

This paper aims to suggest a validity analysis model that would be helpful for local governments considering u-City construction projects and a methodology for them to promote build-transfer-lease (BTL) u-City projects. This methodology mainly uses quantitative and qualitative analysis based on the Value For Money (VFM) designed by the Public and Private Infrastructure Investment Management Center (PIMAC) under the Korea Development Institute (KDI). BTL projects requires a large amount of capital and involves long-term investments. Therefore, multi-faceted validity analysis is required for the success of a project. This study will enumerate various factors to be considered in the pre-analysis of validity of BTL projects and suggest a methodology to verify them. A case study of a BTL project promoted by Ansan City assisted in designing this study in detail.

• 대한안전경영과학회:학술대회논문집
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• 대한안전경영과학회 2004년도 춘계학술대회
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• pp.5-8
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• 2004

Domestic city gas is supplying in an about 10 million household on present 34 city gas companies because is begun to supply regularly after two 1980 years middle. But, result that focus on city gas supply spread and stable supply for supply area and neglects about safety problem, hundreds casualties such as Ahyun explosion accident and Deagu city gas explosion accident were reached in situation that occurred large size calamity occurs it is dizzliness. In the case of advanced nation, can see that accomplish system and progress that in technology after experience major accident. Therefore, grasp problem investigating safety actual conditions for city gas institution and study about solvable plan is required this. Also, must guide reform and level elevation of a domestic company safety technology through induction and development of safety technology that is suitable in supply, domestic real condition etc. Must help in power positivity that is full text executing high-quality safety education about step High firing mechanism safety technology than present safety education.