• KIEAE Journal
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• 제14권6호
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• pp.87-92
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• 2014

The objectives of this study are to investigate input variables of photovoltaic generation programs and to compare their prediction to actual generation of photovoltaic system in the C city hall and the C city sewage treatment plant. We investigated the actual amount of generation, the forecast amount of generation, the amount of solar radiation data, and calculated the relative errors. We simulated the photovoltaic system of C city hall and the C city sewage treatment plant located in Chungju using existing programs, such as SAM, RETSCREEN, HOMER, PV SYST, Solar Pro. The result of this study are as follows : Through examining the relative errors of monthly predicted and actual generation data, monthly generation data showed big errors in winter season?. Except winter season, actual amount of generation and the predicted amount of generation showed no large errors.

• 한국농촌건축학회논문집
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• 제8권1호
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• pp.52-61
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• 2006

From the mid-nineteenth century, Korean have emigrated to Tumen riverside. Their communities have different characters in accordance with the time, intention, and birthplace of emigrants who inclined to keep their fradifin and culture. There are many causes about the formation of communities influenced by Dynasty's Policy in 1885, one of the reasons is to approve Han Min Zhuan Ken Di Qu(legal land development right for Korean immigrants), and provide land development district for Korean immigrants in the north region of Tumen river from 1885. In Tumen riverside, 69 Ferry and wade viuaces have existed for more than 90 years By and large, 21 communities and distributed in He-Long city, 28 communities in Long-Jing city, and 10 communities in tu-men city, and 10 communities in Hun-Chun city.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2008년도 춘계학술대회 논문집
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• pp.1-9
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• 2008

A few of new and large cities have been developed and developing at some areas surrounding Seoul, a capital city of Korea. Thus, commuters from new city to downtown are considerably increasing and the present network of road and railway will be short of transportation capacities. A special problem is that new cities are far from downtown than pre-existing new cities and the entering to downtown is required to a considerable time and cost. Therefore, a new conceptional transportation system has to be substitute with old-fashioned road and railway. This paper presents the feasibility of the deep & high-speed nonstop railway which is able to access to the downtown with ease and fast from new city. If the railway is located under deep position, indemnity cost of land will be notably down. If the railway runs with high speed and has a nonstop concept, the access time to downtown will be remarkably short.

• ETRI Journal
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• 제45권6호
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• pp.939-951
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• 2023

It is critical to estimate the location using only Long-Term Evolution (LTE) and Wi-Fi information gathered by the user's smartphone and deployable for emergency rescue, regardless of whether the Global Positioning System is received. In this research, we used a vehicle to gather LTE and Wi-Fi wireless signals over a large area for an extended period of time. After that, we used the learning technique to create a positioning database that included both collection and noncollection points. We presented a two-step positioning algorithm that utilizes coarse localization to discover a rough location in a wide area rapidly and fine localization to estimate a particular location based on the coarse position. We confirmed our technology utilizing different sorts of devices in four regional types that are generally encountered: dense urban, urban, suburban, and rural. Results presented that our algorithm can satisfactorily achieve the target accuracy necessary in emergency rescue circumstances.

• 한국건설관리학회논문집
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• 제12권4호
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• pp.139-148
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• 2011

u-City사업은 기존의 도시개발 사업과 달리 IT기술과의 융합을 통하여 진행된다. 따라서 기존의 개발사업의 비하여 더 많은 복잡성, 다양성을 내포하여 더 많은 위험요인들을 내제하고 있다. 이러한 리스크 요인들을 체계적으로 확인하고 정량화하여 관리, 통제할 수 있는 리스크 관리체계에 대한 필요하다. 특히 계획단계는 그 위험 요인이 다양한 형태로 나타나게 되어 사업의 성패에 많은 영향을 주는 단계이지만, 위험요인에 대한 관리는 소극적인 형식에 머물러 있다. 이러한 상황에서 리스크 요인들의 식별과 분석을 통한 리스크관리는 가장 필요한 요소이다. 따라서 본 연구에서는 u-City 사업의 지속적인 성장과 성공적인 수행을 위하여 계획단계에서의 문제점과 기존의 개발사업의 리스크 요인을 분석하여, u-City 계획단계에서 관리되어야 할 리스크 인자를 식별하고 이를 통계적 기법을 활용하여 리스크의 중요도, 발생확률, 발생영향에 따라 리스크 요인을 분석하여 정량화 하였다. 이를 통하여 우선적으로 관리되어야 할 핵심리스크 요인을 도출하였으며, u-City사업의 효과적인 리스크 관리를 위한 기초자료를 마련하였다.

• 한국환경과학회지
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• 제16권1호
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• pp.129-142
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• 2007

The main purpose of this study was to comprehensively evaluate the local agenda 21 of Daegu City based on the evaluation model and propose important measures to solve its problems and improve the limitations. As a whole, the evaluation result of the local agenda 21 of Daegu City showed very low score, only 151 points out of 500 points and revealed it was below the level in all three domains of making process, designed content, and evaluation of implementation. The making process got only score below the half in all large indicators of under-standing, driving, and rationality. This unsystematic and irrational process inevitably resulted in ambiguous and proclamatory content mainly expressing willingness to do. This fact means that the local agenda 21 of Daegu City has not served as the comprehensive local environmental plan containing visions, policies, ends and means. It did not suggest evaluation system and institutionalization of evaluation. These results of evaluation suggested that the existing local agenda 21 of Daegu City was neither useful nor effective and thus the totally new local agenda 21 should be prepared. Finally, important measures in making process, designed content and evaluation of implementation were proposed for the remaking.

• 건축역사연구
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• 제28권6호
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• pp.55-65
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• 2019

Ganggyeong, a city which is located at riverside of Geum River, played a role to connect the inland cities and the coastal cities through the Geum river waterway. In Chosun dynasty, Ganggyeong was one of the three major markets in Korea, and at the same time, it was one of the two river docks in Korea. However, after the railway was installed in Korea, railroad was more important than waterway in transporting logistics and in 1911 Honam railroad and Ganggyeong railway station was installed. Thus it was necessary to reorganize urban structure of Ganggyeong city from the traditional river-dock city to modern railroad city. In addition, urban infrastructure to prevent flood damage was needed because Ganggyeong suffered from floods and water shortages every year. Therefore, between 1910s and 1930s large-scale social infrastructures including road, water and sewage system, river bank, floodgate was constructed not only to revitalize the declining city but also to prevent flood damage and water shortages that hinder urban development. The installation of urban infrastructure has enabled the urban expansion and development of Ganggyeong city, and it is still served as a basic urban structure.

• 대한지리학회지
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• 제34권3호
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• pp.247-264
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• 1999

In this study, I investigate how city parks have been created, and what are some characteristics of the location and function of 69 city parks in Tokyo. The city parks in Tokyo have been made in three patterns. The first is planned parks which have been created as a urban facilities considering the scales and types. The second is memorial parks which have been made to memorialize the national monumental event or to preserve natural and cultural resources. The third is public property parks which have been made by occurrence of public vacant land which is resulted from the grant of Royal Garden, restoration of public rented ground, producton of reclaimed land, utilization of dry river bed. The city parks can be classified in five patterns according to distance from CBD and park area. The first is central parks which have historical characteristics strongly. The second is planned parks that are specialized functionally. The third is large scale urban edge parks which are located in the edge of 23-Gu(district) in Tokyo. The fourth is hill parks which have natural characteristics strongly. The fifth is waterside parks that are located along a lake, a pond, a river, or artificial waterside facilities. From this study I have found out that a great effort has been made to activate the utilization of parks for residents in Tokyo, through mnagement goals and ways of parks, composition and chatacteristics of park facility resources, various Events, residents participation in undertaking of parks.

• 토지주택연구
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• 제11권4호
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• pp.35-50
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• 2020

The purpose of this study is to examine which factors are important in determining the amount of the apartment supply in Changwon City. Additionally, this study is to examine the changes in the determination of the amount of apartment supply in Changwon by dividing it into before and after 2016 as the city showed a large difference in apartment supply that caused structural changes during this time period. This study shows that the increase in the number of housing construction permits in Changwon before 2016 had a negative impact on the housing market as well as causing a decrease in the supply of apartments in Changwon after 2016. As a result of the shortsighted predictions on the housing market of Changwon from before 2016, it still affects the current housing market as of June 2020. The implication of this study is that through the housing market system of Changwon City, they can take the role as a control tower in Changwon City and propose principles and standards for supply control in order to better predict the demand of the housing market.

• Fisheries and Aquatic Sciences
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• 제26권4호
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• pp.241-255
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• 2023

The robust development of frog farming offered high economic benefits but created a large waste residue of frog bones and skin that received little attention. Over the years, inedible by-products have often been processed into biomolecules of potential value and environmental benefits, such as collagen, gelatin, and bioactive peptides. An overview of bioactive compounds on frog skins from various countries indicated that brevinin was the most abundant biological peptide found in frog skin. Other remaining compounds also possessed their highlighted activities, including antibacterial, stimulating insulin release and gastric hormone release, anti-cancer, and neuroregulatory. Notably, various components have been analyzed in the structure and sequence to give meaningful insight into clustering components related to their biological activity. This review may create a source of raw materials for the developmental research of by-products from frog skin and concomitantly reduce environmental pollution.