• 제목/요약/키워드: city center

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u-City 통합운영센터의 제도적 정착방안에 관한 연구 ; 기능 및 입지를 중심으로 (Study on the Legal Establishment of u-City Management Center ; Focusing on its Function and Location)

  • 조춘만;김정훈
    • Spatial Information Research
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    • 제17권3호
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    • pp.269-276
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    • 2009
  • U-City의 계획, 건설 및 운영 관리를 지원하기 위한 "유비쿼터스도시의건설등에관한법률(이하 'u-City법')" 이 제정, 공포되었다(2008.3.28). 이러한 법제도적 기반을 바탕으로 u-City 통합운영센터(이하 '운영센터')는 u-City는 일반도시가 u-City로 변모하기 위한 필수 구현요소로서의 의미를 갖게 되었다. 본 연구의 목적은 운영센터의 성공적 구현을 위한 법적 기반 조성의 일환으로 이제까지 거론된 운영센터의 제반 현안을 기능 및 그 구현을 위한 적정한 입지를 중심으로 재정리하고, 운영센터의 성공 구현을 위한 제도정착의 기본방향과 추진전략을 제시하는데 있다. 본 연구의 결론으로서 운영센터의 성공적 제도화 정착을 위해서는 기능유형의 분류 및 표준화, 사업위계별 센터의 기능부여, u-City서비스 및 기반시설 등 운영센터 제도화에 요구되는 기초 관련용어 및 상호관계 규정 등의 필요성이 제시되었다. 또한 센터의 기능 및 입지의 구체화에 따른 재원확보방안 및 SPC 등 민간참여에 의한 운영센터 실행력 확보방안과 법제도적 측면에서 운영센터 설치관련 의무규정 명확화 등이 제시되었다.

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대규모 택지개발에 의한 도시확장이 도시 공간구조변화에 미치는 영향분석 - 대전광역시를 대상으로 - (A Study on the Influences of Urban Area Expansion by Developing a Large Scale Residential District on Changes of Urban Spatial Structure - In the Daejeon Metropolitan City -)

  • 정영환;강인호
    • 한국주거학회논문집
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    • 제17권5호
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    • pp.137-146
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    • 2006
  • This study was aimed to analyze the influences of urban expansion by developing a new large scale residential district on changes of whole urban spatial structure. For the analysis, time serial analysis was conducted on the Daejeon Metropolitan City by using the space syntax method. The results of the study are as follows ; First, an expansion of urban area led to lower both of the local and global integration levels, second, the spatial occupation ratio of upper 10% in the whole integration showed that old city center was separated, and moved to the Dunsan District, third, the results also showed that an integration of the old city center region maintained a high level in spite of a movement of city center and its local integration still had highest level so that the old city center will take one of the two city center roles together with Dunsan District.

Assessment of In vitro Antioxidant, Antidiabetic and Cytotoxic Activities of Sphaeranthus africanus Extracts

  • Tran Thi Huyen;Julien Dujardin;Nguyen Thi Thu Huong;Chung Thi My Duyen;Nguyen Hoang Minh;Ha Quang Thanh;Dao Tran Mong;Ly Hai Trieu;Nguyen Mai Truc Tien;Mai Thanh Chung;Nguyen Nhat Minh;Nguyen Thi Ngoc Dan;Huynh Loi
    • Natural Product Sciences
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    • 제29권2호
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    • pp.98-103
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    • 2023
  • Sphaeranthus africanus is commonly used as a traditional remedy for sore throats and pain treatment in Vietnam. The aerial parts have been studied for its anti-inflammatory and anti-proliferative properties. However, the antioxidant and antidiabetic potential of the plant has not been explored. In this work, hydrophilic extracts of the plant's aerial parts were prepared in order to investigate its antioxidant and anti-diabetic properties. Also, the cytotoxicity of the root was evaluated and compared to that of the aerial parts. All of the extracts inhibited lipid peroxidation with IC50 values ranging from 2.05 to 3.56 ㎍/mL, indicating substantial antioxidant activity. At an IC50 value of 4.80 ㎍/mL, the 50% ethanol extract exhibited the most potent inhibition of α-glucosidase. The cytotoxic activity of root extracts is 2 to 5-fold less than that of the aerial parts. Nevertheless, dichloromethane and ethyl acetate extracts of the root demonstrated a selective effect on leukemia cells, with no harm towards the normal HEK-293 cell line. This work provides a scientific support for the antioxidant and antidiabetic activity of the plant. Hence, it may find a promising material for the development of novel antioxidant and antidiabetic agents. More research can be conducted on the phytochemistry and anticancer activities of the plant's root.

Diffuse-Type Histology Is Prognostic for All Siewert Types of Gastroesophageal Adenocarcinoma

  • Kelly M Mahuron;Kevin M Sullivan;Matthew C Hernandez;Yi-Jen Chen;Joseph Chao;Laleh G Melstrom;I. Benjamin Paz;Jae Yul Kim;Rifat Mannan;James L. Lin;Yuman Fong;Yanghee Woo
    • Journal of Gastric Cancer
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    • 제24권3호
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    • pp.267-279
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    • 2024
  • Purpose: The optimal treatment for gastroesophageal junction adenocarcinoma (GEJA) remains controversial. We evaluated the treatment patterns and outcomes of patients with locally advanced GEJA according to the histological type. Materials and Methods: We conducted a single-institution retrospective cohort study of patients with locally advanced GEJA who underwent curative-intent surgical resection between 2010 and 2020. Perioperative therapies as well as clinicopathologic, surgical, and survival data were collected. The results of endoscopy and histopathological examinations were assessed for Siewert and Lauren classifications. Results: Among the 58 patients included in this study, 44 (76%) were clinical stage III, and all received neoadjuvant therapy (72% chemoradiation, 41% chemotherapy, 14% both chemoradiation and chemotherapy). Tumor locations were evenly distributed by Siewert Classification (33% Siewert-I, 40% Siewert-II, and 28% Siewert-III). Esophagogastrectomy (EG) was performed for 47 (81%) patients and total gastrectomy (TG) for 11 (19%) patients. All TG patients received D2 lymphadenectomy compared to 10 (21%) EG patients. Histopathological examination showed the presence of 64% intestinal-type and 36% diffuse-type histology. The frequencies of diffuse-type histology were similar among Siewert groups (37% Siewert-I, 36% Siewert-II, and 33% Siewert-III). Regardless of Siewert type and compared to intestinal-type, diffuse histology was associated with increased intraabdominal recurrence rates (P=0.03) and decreased overall survival (hazard ratio, 2.33; P=0.02). With a median follow-up of 31.2 months, 29 (50%) patients had a recurrence, and the median overall survival was 50.5 months. Conclusions: Present in equal proportions among Siewert types of esophageal and gastric cancer, a diffuse-type histology was associated with high intraabdominal recurrence rates and poor survival. Histopathological evaluation should be considered in addition to anatomic location in the determination of multimodal GEJA treatment strategies.

기반시설 관점에서의 u-City 기술 분류에 대한 연구 (A Technology Classification Scheme of u-City Technology from Infrastructural point of view)

  • 임시영;조춘만;박주희
    • 한국IT서비스학회:학술대회논문집
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    • 한국IT서비스학회 2008년도 추계학술대회
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    • pp.482-485
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    • 2008
  • 본 연구에서는 u-Eco City 건설을 위한 u-City 기술 연구의 첫걸음으로서 기반시설 관점에서 u-City기술을 분류하고자 한다. 이는 u-City를 구현할 때 기반시설에 u-City기술을 접목함으로써 u-City서비스를 실현할 수 있기 때문에 의미가 있다. 즉, "유비쿼터스 도시건설 등에 관한 법률"에서 언급하고 있는 u-기반시설의 개념을 도입하여 기술을 분류함으로써 서비스-기술-기반시설의 연계성을 명확하게 파악할 수 있다. 본 연구에서 제시하고자하는 u-City 기술의 분류는 u-City기술의 범위를 정하고, 추후 기술개발의 전략적 목표 설정 및 기술전략 수립의 기초자료로써 활용될 수 있으리라 기대된다.

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부산시 도심기능의 유형별 도심재생에 관한 연구 (City Center Regeneration on City Center Function Type in Busan)

  • 김흥관;여성준
    • 한국지리정보학회지
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    • 제11권3호
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    • pp.174-182
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    • 2008
  • 도심공동화를 조사 분석하여 그에 적합한 도심재생방안을 부산시의 특성을 고려하여 제시할 것이다. 도심의 기능별 지역을 알기위해서 부산시의 도심(축)에 속하는 15개 동과 부도심에 속하는 12개동을 대상으로 도심의 공간적 특성과 도심공동화현상을 파악하고자 하였다. 이들 지역에 22개의 변수를 선택하여 요인분석을 사용하였다. 그 분석의 결과는 다음과 같다. 주요요인은 4개 나타났으며, 누적 설명력은 80.4%로 높게 나타났다. 이들 요인은 주거적 요인, 상업적 요인, 관리적 요인, 도심의 발전(쇠퇴) 요인을 설명하는 성분으로 나타났다. 도심(축)에 속하는 지역에서 주거적 기능의 공동화가 보이며, 부도심에서는 상업적 기능과 관리적 기능의 공동화가 나타나고 있다. 그리고 전체적인 기능별 도심공동화현상이 나타나고 있으므로 종합적인 도심재생방안의 모색이 시급하다고 할 수 있겠다. 그리고 도심의 지역별 특성이 다르게 나타나고 있으므로 지역별 특성에 부합되는 도심재생방안이 수립되어야 하겠다.

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Development of an Integrity Evaluation Program for Corroded City Gas Pipelines

  • Shim, D.J.;Yun, K.O.;Choi, J.B.;Kim, Y.J.;Kim, W.S.;Choi, S.C.
    • Corrosion Science and Technology
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    • 제4권4호
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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.