• Proceedings of the Korea Air Pollution Research Association Conference
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• 2000.11a
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• pp.405-406
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• 2000

최근의 유가 상승으로 석유파동이 우려되며, 비산유국인 우리나라의 경우 석유를 대체할 에너지 개발의 필요성이 절실히 요구되고 있다. 한편 국내에서는 석탄의 지역적 편재성이 적고 풍부한 매장량을 가지고 있으면서도 이산화황 등의 대기오염문제를 해결하지 못해 사용량이 해마다 줄어들고 있다. 따라서 잉여탄의 관리 및 처분 문제가 대두되고 있으며, 잉여탄의 소모처 개발이 요구되고 있다. (중략)

• Proceedings of the KSEEG Conference
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• 2003.04a
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• pp.209-212
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• 2003

한국의 금속광산은 일제시대에 금광산을 중심으로 본격적으로 개발되어 1943년 산금령시에 1,522개 광산이 가행되었다. 최근까지 1990개 광산이 개발된 것으로 알려지고 있으며 2002년 말 현재 7개 광산만이 가행되었다. 1960년대까지 국내 광산은 금, 은 동, 연아연, 철, 중석 등을 중심으로 활발히 가행되어 주요 외화 획득원으로 중요한 위치를 차지하였다. 그 이후 산업발전에 따라 수요는 증가세를 보인 반면 가행광산과 생산량은 매년 감소하여 최근 금속광물자원 자급도는 0.21%로 미미한 수준이며 수요의 대부분을 해외에 의존하고 있다. (중략)

• Proceedings of the KSEEG Conference
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• 2003.04a
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• pp.234-235
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• 2003

근대에 들어 우리나라는 산업 발전과 인구 증가로 인해 과거보다 많은 수자원을 필요로 하고 있고, 오염도 많이 진행되어 있다. 특히 가장 많이 사용되는 지하수는 농경을 위한 농약의 사용과 산업 폐기물 및 광산 폐수의 유입 등으로 인해서 오염이 되고 있다. 특히 해안지역에서 일어나는 지하수의 염수화는 많은 문제점을 야기한다. 해수침투는 해안 지역에서 지하수의 매장량을 감소시키고, 염도 증가로 인한 수질의 저하를 발생시켜 계속적인 지하수의 개발을 어렵게 만들고 인근 지역의 발전을 저해하게 된다. (중략)

• Proceedings of the Korean Society for Bio-Environment Control Conference
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• 1994.11a
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• pp.88-91
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• 1994

실험목적 :제주지방에 화산락인 송이(Scoria)가 수억톤 매장된 것으로 추정된다. 이 제주송이를 배지로 이용한 양액 재배에서 품질과 수량이 perlite, rock wool 등 일반 고형 배지경과 떨어지지 않는 연구 결과는 있으나 작물의 생육 과정에서 제주 송이가 양액 성분변화에 어떤 영향을 미치는지는 아직 발표된 바가 없다. 양액재배용 고형배지로 제주 송이가 안전한 사용을 위한 기초자료를 얻고자 수행했다. (중략)

• Korean Journal of Heritage: History & Science
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• v.52 no.2
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• pp.240-253
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• 2019

Archaeological heritages are precious cultural relics and public assets that must be preserved, conserved, and shared with people all over the world. Investigating archaeological heritage is valuable and plays an important role for the public good; our ancestors' cultures can be restored, and it helps with developing a clear understanding of the cultural and social aspects of a historical period as well as teaches about historical factors unreported in the literature. One of the most basic and important conditions necessary for recognizing the value and importance of archaeological heritage investigation, expertise, and quality improvement is to establish detailed criteria for investigation services and the qualification examination of archaeological heritage. Observation of detailed criteria and the qualification examination of archaeological heritage can partially demonstrate society's recognition of strengthening transparency, public property, and the objectivity of the investigation of archaeological heritage. However, the detailed criteria for investigation services and the qualification examination of archaeological heritage currently implemented as administrative rules are neither followed by all institutes in the public and private sectors nor the government. Thus, there are serious problems in terms of the effectiveness and stability of institutions. The detailed criteria for the qualification examination breach the principle of statutory reservation, the principle of statutory regulation, and regulations on the announcement and management of orders and rules. Non-compliance with compensation criteria for investigation services or with detailed criteria for the qualification examination of archaeological heritage will be one of the reasons for the failure of the investigation foundation for archaeological heritage in the future. That is, it will result in the expansion, reproduction, and repetition of a vicious cycle of conflict between developers, who are the decision-makers responsible for selecting an investigating organization for archaeological heritage and determining the cost, and investigating organizations. This includes the impractical shortening of investigation periods and reducing costs by developers, distrust of the values and the importance of investigations of archaeological heritage, a decrease in quality, accidents caused by a lack of safety, a lack of occupational ethics, and non-recruitment of new experts, etc. Therefore, it is necessary to change the structure from a vicious cycle to a virtuous cycle, and promote the enactment of regulations that will ensure effectiveness and stability in the process of attaining the goals of the institution and application of the institution, as well as the continuous advancement of work to fill the gaps with reality.

• Journal of the Korean Society of Clothing and Textiles
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• v.33 no.6
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• pp.968-979
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• 2009

The purpose of this study was to examine the relationship between the willingness to adopt mass customization and four proposed characteristics: organizational, individual, technological, and environmental. Retail managers' and consumers' point of view was separately examined to distinguish their characteristics and willingness to adopt mass customization. The sample of this study consisted of 66 managers and 274 consumers in their twenties. The researcher obtained seven findings from the hypotheses testing. The determinants of mass customization adoption were managers' technology and environmental characteristics, and consumers' individual, technology, and environmental characteristics. The most influential variables for the willingness to adopt mass customization were technology characteristics and retailer's customer relationship management process, where customer satisfaction and customer relationships are the top priority in an organization.

• Korean Journal of Heritage: History & Science
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• v.53 no.1
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• pp.24-33
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• 2020

In excavated bronze artifacts, corrosion products of various shapes and colors are observed due to multiple corrosion factors coexisting in the burial environment, and these corrosion products can constitute important data not only in terms of long-term corrosion-related information, but also in connection with preservation of artifacts. As such, scientific analysis is being carried out on the corrosion layer and corrosion products of bronze artifacts, and the corrosion mechanism and the characteristics of corrosion products elucidated, which is essential for interpreting the exposed burial environment and its association with corrosion factors inside the burial environment. In this study, after classifying excavated bronze artifacts according to alloy ratio and fabrication technique, comprehensive analysis of the surface of corrosion artifacts, corrosion layer, and corrosion products was carried out to investigate the corrosion mechanism, formation process of the corrosion layer, and characteristics of corrosion products. The study designated two groups according to alloy ratio and fabrication technique. In Group 1, which involved a Cu-Sn-Pb alloy and had no heat treatment, the surface was rough and external corrosion layers were formed on a part, or both sides, of the inside and the outside, and the surface was observed as being green or blue. α+δ phase selection corrosion was found in the metal and some were found to be concentrated in an empty space with a purity of 95 percent or more after α+δ phase corrosion. The Cu-Sn alloy and heat-treated Group 2 formed a smooth surface with no external corrosion layer, and a dark yellow surface was observed. In addition, no external corrosion layer was observed, unlike Group 1, and α corrosion was found inside the metal. In conclusion, it can be seen that the bronze artifacts excavated from the same site differ in various aspects, including the formation of the corrosion layer, the shape and color of the corrosion products, and the metal ion migration path, depending on the alloy ratio and fabrication technique. They also exhibited different corrosion characteristics in the same material, which means that different forms of corrosion can occur depending on the exposure environment in the burial setting. Therefore, even bronze artifacts excavated from the same site will have different corrosion characteristics depending on alloy ratio, fabrication technique, and exposure environment. The study shows one aspect of corrosion characteristics in specific areas and objects; further study of corrosion mechanisms in accordance with burial conditions will be required through analysis of the corrosive layer and corrosive product characteristics of bronze artifacts from various regions.

• Journal of Digital Convergence
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• v.14 no.10
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• pp.167-172
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• 2016

Commercial analysis has been used for a lot of reasons such as improving the distribution structure, operational cost savings. However, existing commercial assay system is mostly flow through the analysis of the population and the environment around the store. Therefore, in this paper, we design a path weighted data analysis system for efficient product arrangement. It is not applying the analysis method of the existing commercial sales center but the data analysis system applying the weight to the form of customers' paths in a store. In conjunction with the existing POS system, it provides effective product placement in department stores, such as supermarkets, convenience stores. To this end, a system that maximizes efficiency of product placement in stores, receiving path data, converting them into statistics data that apply the weight, and printing out them into a visualized monitering system for the manager to see was designed.

• Journal of the Korea Society for Simulation
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• v.17 no.3
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• pp.35-44
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• 2008

Facility location problem is an important subject in many areas of modern business environment. In this paper, we deal with uncapacitated and multi-period facility location problem where the object is a maximization of total profit within predetermined cost. We assume that all demand have to be met. Particularly, we represent various types of customer based on four well-known urban spatial structures to represent a spread of customers. Those are concentric zone model, sector model, multiple nuclei model and star model respectively. We apply to the genetic algorithm to simulate a large scaled problem and develop simulator. We analyze both optimal numbers and locations of facilities for each urban structure. Furthermore, we examine the appropriate time to further expansion of the facilities in the planning horizon. The experimental results show that the developed algorithm can be applied effectively to the facility location problem in the various types of urban area.

• Economic and Environmental Geology
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• v.46 no.4
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• pp.291-300
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• 2013

The potential mineral resources in North Korea are magnesite, limestone, coal, graphite, iron, gold, silver, lead, and zinc. North Korea is mainly exporting coal and iron to China(70%) and EU countries. Gold ore reserves(or resources) in North Korea are about 2,000 tons and annual production is 2 tons based on metal. Major gold mines are Sooan, Holdong, and Daeyoodong mines and six smelters are operating. Fe ore reserves (or resources) are 4.3 billion tons and annual production is about 5 million tons based on 63.5% Fe. Major iron mines are Moosan, Leewon, Eunryul, Shinwon, and Jaeryong and 7 smelters are operating. Pb and Zn ore reserves(or resources) are Pb 470,000 tons and Zn 15 million tons, and annual productions are about Pb 26,000 tons and Zn 50,000 tons based on metal respectively. Major Pb-Zn mines are Gumdock and Seongcheon mines. Magnesite ore reserves(or resources) are 2.8 billion tons (95% MgO) and annual production is about 150,000 tons. Major magnesite mines are Ryongyang, Daeheung Youth and Ssangryong mines, and 5 magnesium refractory factories are operating. Apatite ore reserves(or resources) are 340 million tons(30% $P_2O_5$) and annual production is about 300,000 tons(crude ore). Major apatite mines are Daedaeri, Dongam and Poongnyen mines. Coal is established as an important strategic fuel mineral resources and is a major energy source in North Korea. Coal ore reserves(or resources) are 18.6 billion tons and annual production is about 20 million tons. The main coal fields is located in southern Pyongan and the Jigdong mine is the biggest in North Korea.