• Resources Recycling
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• v.31 no.1
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• pp.3-11
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• 2022

Silicon is the most abundant metal element in the Earth's crust. Metallurgical-grade silicon (MG-Si) is an important metal that has wide industrial applications, such as a deoxidizer in the steelmaking industry, alloying elements in the aluminum industry, the preparation of organosilanes, and the production of electronic-grade silicon, which is used in the electronics industry as well as solar cells. MG-Si is produced industrially by the reduction smelting of silicon dioxide with carbon in the form of coal, coke, or wood chips in electric arc furnaces. MG-Si is purified by chemical treatments, such as the Siemens process. Most single-crystal silicon is produced using the Czochralski method. These smelting and refining methods will be helpful for the development of new recycling processes using secondary silicon resources.

• Fashion & Textile Research Journal
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• v.18 no.4
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• pp.424-437
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• 2016

The study will analyze the costumes of the Scythians tribes who lived in the region of Altai in the 3-5 century BC. The purpose of this study is to prepare new material to re-examine the theory, which claims that the origin of the circular motives of korean costumes are to be found in the typology of the Scythian costumes. In this study, we analyzed the most recent reports of archaeological excavation about the unearthed clothes in the Pazyryk region and compared its information with european literature. The conclusion of this study is as follows: The jackets of the Pazyryk region are classified in two types, (1) opened jacket with narrow sleeve and (2) enclosed jacket with narrow sleeve. Trousers were separated by (1) narrow and (2) extreme wide trousers. The enclosed jacket of tunic form and extreme wide trousers are newly excavated. It proves, there was a vivid exchange between the Scythians and their neighboring cultures. It can be noted, that there existed a diverse Scythian culture of costumes, besides the commonly known clothing culture of the "Pazyryk-rider". Based upon the results of the previous research, it can be said that the opened jacket with narrow sleeve and narrow trousers are costume typologies which are common for all Scythian tribes of the whole Eurasian region. The hem of the edge of jacket is proven to be a connective element, which is common to all Scythian tribes.

• Fashion & Textile Research Journal
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• v.17 no.2
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• pp.191-202
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• 2015

The purpose of this study is to examine the form of the clothing of the Scythians who lived in the northern region of the Black Sea. This study refers to data, which has been extracted from reviews of literature, articles and catalogs of Scythian exhibitions held in Germany, a country where famous Scythian research was collected and analyzed. Results of this study are as follows: Regarding the basic form, there was no change in the appearance of the Scythian clothes which can be linked to social classes and regional background. But the detailing of the clothes changed. Russian archaeologist Klocko has stated that decorative bands of ancient costume appear to depend on the construction of ancient clothing. I have analyzed the upperjacket of Scythians with the decorative bands based on the research of Klocko. From this analysis could be observed that decorative bands of upperjacket had also been varied depending on their region and their social status. The decoration of the revers of upperjacket differs according to social status. According to their width, trousers were classified in types; in narrow and wide. The basic set up of the narrow-type is as follows: the trouser is divided into voluminous straight forms and leggings in close contact with the legs. The width of a trouser differs according to the social status of Scythians and from the region where they lived. Regional differences could be observed more significantly, than differences resulting from social status.

• Fashion & Textile Research Journal
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• v.18 no.1
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• pp.63-70
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• 2016

This study examines wearing conditions of skinny jeans for women in their 20's. The study is based on a questionnaire survey. The survey was conducted on 313 Korean 20's women living in Gwangju to analyze wearing dissatisfaction with skinny jeans. The final analysis included 298 responses and the content of the questionnaire consisted of 28 questions. The study used descriptive statistics for analysis using SPSS Statistics 20.0. According to the questionnaire survey, 20's women are the largest group that wear skinny jeans and they have a positive image of them. However, they do not know the exact size for skinny jeans, whereas they are knowledgeable about their general pants size. The results of the survey on the state of wearing dissatisfaction indicate that they think that the difference in size by each brand is the most difficult part when choosing skinny jeans and they felt lower body uncomfortableness in the waist and abdominal positions. It means that size subdivision and pattern development of skinny jeans should be suitable to all lower body types to resolve wearing dissatisfaction. This study represents base data for size subdivision and pattern development of skinny jeans.

• Journal of Korean Institute of Industrial Engineers
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• v.25 no.3
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• pp.290-297
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• 1999

In interior point methods for linear programming, we must solve a linear system with a symmetric positive definite matrix at every iteration, and Cholesky factorization is generally used to solve it. Therefore, if Cholesky factorization is not done successfully, many iterations are needed to find the optimal solution or we can not find it. We studied methods for improving the numerical stability of Cholesky factorization and the accuracy of the solution of the linear system.

• Aerospace Industry
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• s.106
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• pp.68-69
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• 2010

지난 4월10일, 오전 10시 56분쯤 러시아 모스크바 서쪽 350km에 위치한 스몰렌스크 군용공항 활주로 부근에 Tu-154 폴란드 정부 전용기가 추락하는 사고가 발생했다. 이 사고로 레흐 카친스키(Kaczynski) 폴란드 대통령 부부를 비롯한 폴란드 정부대표단 88명과 승무원 8명 등 96명의 탑승객 전원이 사망했다. 일단 러시아 정부는 관제탑의 지시를 따르지 않고 무리하게 착륙을 시도한 조종사의 과실로 보고 있으나 정치적으로 민감한 사안이라 정확한 사고원인 규명에는 다소 시간이 소요될 것으로 전망된다. 이번 사고를 통해 항공사고 원인규명을 위한 항공사고 조사에 대해 알아본다.

• Journal of Korea Entertainment Industry Association
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• v.13 no.3
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• pp.101-110
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• 2019

The actor's art work is to build and create a role on stage based on the writer's drama. The actor's role creation is possible by analyzing the role of the writer in the drama logically and acting it actively. This is how an actor who practices practical acts goes beyond a stereotypical role-building and performs live acting skills. A case study in the field work for the application of Etude is absolutely necessary at present, where Etude of Stanislavsky is operated in Korean university education and field. This study will be a case in which Etude, which is a scientific and systematic acting methodology of Stanislavsky, is recognized and applied in the field as a methodology for more extended actor training methodology rather than making a judgment about the value of Etude as applied to theater education and the field as an acting training method. The researcher will introduce the methodology of using Etude as an acting method of Stanislavsky through the use of Etude in the creative play , and would like to give an example of an acting creation process model about 'how to apply Etude'. Through these studies and applications, actors can avoid falling into stereotypes and mannerism, and prepare the foundations for a living actor's art, the acting guide for creating a practical role.

• Journal of Digital Convergence
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• v.15 no.5
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• pp.461-469
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• 2017

This study is to investigate the relationship among anticipation, organizational trust and cooperative intention of members of ski club for 2018 Pyeongchang Winter Olympics. Moreover, to provide the basic data for Gangwon-do Province, Pyeongchang-gun and 2018 Pyeongchang Winter Olympics committee and to propose a plan to become a successful tournament by leading to take active participation and cooperation of the ski club members. In order to achieve these objectives, this study was given to a sampling of 341 people from members of ski club in Gangwon W, F resort. First, there was correlation static (+) between expectations and organizational trust among all factors and partially impact on an organizational trust by economic/industrial and social/cultural factors as a sub factors of expectation. Second, correlation static (+) between expectations and cooperative intention among all factors and significant impact on cooperative intention by social/cultural factors as a sub factors of expectation. Third, correlation static (+) between organizational trust and cooperative intention among all factors and significant impact on cooperative intention by trust factor as a sub factors of expectation.

• The Optical Journal
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• s.101
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• pp.96-97
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• 2006

우리나라 사람들에게 겨울철 여행지를 꼽으라면 온천이 빠지지 않을 정도로 오랜 사랑을 받아왔다. 요즘에는 매서운 바람을 맞으며 스키를 탄 후에 뜨거운 온천물에 몸을 녹이며 여독을 풀 수 있는 패키지여행상품이 최고의 인기를 구가하고 있다. 특히 최근에는 어린이를 위한 물놀이 시설과 노천탕, 건강을 위한 각종 기능성 탕까지 갖춘 대형 온천들이 생겨나면서 남녀노소할 것 없이 가족이 함께 즐길 수 있는 여행지로 인기를 끌고 있다. 그중 온천하는 재미는 뭐니뭐니 해도 노천탕이다. 하늘을 바라보며, 흩날리는 눈발을 맞으며 온천욕을 하는 맛은 다른 무엇에 비길 데 없다.

• Journal of the Korean Geographical Society
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• v.43 no.5
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• pp.715-727
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• 2008

This study analyzed changes on the best condition of temperature and relative humidity for making artificial snows in the Yongpyong Ski Resort using data from Daegwallyeong. Depth of snowfall and snowfall days have decrease since 1990s. If the Yongpyong Ski Resort has only to depend on natural snows, it would be difficult to make and maintain ski slope. There are two times of snowmaking during ski seasons: one is the first snowmaking (October-November) for opening ski slopes and the other is the reinforcement of snowmaking (December-March) for maintaining snow quality during the seasons. Days having the best condition for the first snowmaking (daily minimum temperature below $-1^{\circ}C$ and daily average relative humidity 60 to 80 percent) decreased after 1970s. Days having the best condition for the reinforcement of snowmaking also decreased. While temperature changes are more evident than humidity changes for the first snowmaking, humidity changes are more obvious than change of temperature for the reinforcement of snowmaking. In the future climate projection by A1B scenarios, the length of ski seasons projected to decrease a 10 to 40 percent against the period of 1973-2008. The climate condition for the snowmaking projected to be poor, especially the due to increase of temperature.