• Journal of the Korean Data and Information Science Society
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• 제20권1호
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• pp.49-55
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• 2009

게임이론 중 특히 협력게임은 종종 그래프에서의 지배문제로에 기인하며, 협력게임에서의 코어는 바로 이에 대한 선형프로그램의 최적해가 될 수 있다. 이 논문에서는, 분수 지배게임의 특수한 형태인 분수 지배게임을 새롭게 정의하며, 분수 지배게임의 코어를 찾는다. 더욱이 선형 프로그래밍과 그 쌍대성 개념을 이용하여 {k}-분수 지배게임의 균형성을 조사한다. 또한 코어의 원소를 찾기 위한 중요한 문제가 되는 오목성에 있어서 분수 지배게임도 오목성을 가질 것이라고 추축해본다.

• 한국환경과학회지
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• 제15권5호
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• pp.447-459
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• 2006

Long-term trends and distribution patterns of water quality were investigated in the Cheonsu Bay of Korea from 1983 to 2004. Water samples were collected at 4 stations and physicochemical parameters were analyzed including water temperature, salinity, suspended solids (SS), chemical oxygen demand (COD), dissolved oxygen (DO) and nutrients. Spatial distribution patterns were not clear between stations but the seasonal variations were distinctive except COD, SS and nitrate. Twenty two year long-term trend analysis by PCA revealed the significant changes in water quality in the study area. Water quality during 1980's and early 1990's showed high SS, low nutrients and low COD which increased during the mid and late 1990's and early 2000's. Overall water duality in the Cheonsu Bay indicated the increase in nutrients and COD concentration.

• 한국조사연구학회:학술대회논문집
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• 한국조사연구학회 2001년도 춘계학술대회
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• pp.109.1-127
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• 2001

이 글에서는 사회 조직이나 집단에 참여하는 개인들의 사회인구학적 특성을 통해 이들 조직의 생태지위를 측정하는 방법을 인터넷사이트와 자원조직이라는 두 가지 사례를 통해 제시하였다. 구체적으로 인터넷사이트의 생태지위는 사이트 방문자들의 연령과 교육연수로, 자원조직은 참여자들의 연령, 교육연수, 직업위신을 바탕으로 측정하였다. 결과적으로 이 글에서는 참여자들의 사회인구학적 특성을 바탕으로 각 조직들의 생태지위의 범위 뿐 아니라, 생태지위간의 중복 정도를 통하여 조직들간의 잠재적 경쟁 및 공생의 가능성을 분석할 수 있다는 것을 제시하였다. 이는 조직의 성과에 대한 조직 환경의 영향을 생태학적으로 분석하는 것을 가능하게 한다. 결론적으로, 이 글에서는 생태지위의 분포를 참여하는 개인들의 사회인구학적 특성의 분포를 측정함으로써 조직이 사회적인 진공 상태에서 무작위로 만들어지는 것이 아니라, 조직을 구성하는 개인들의 연령, 교육, 직업위신과 같은 사회인구학적 변수들의 분포의 영향을 받는다는 것을 보여주고자 하였다.

• 한국게임학회 논문지
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• 제20권4호
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• pp.33-46
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• 2020

본고는 게임 중독의 환경적 원인과 미디어의 영향력을 분석하고 내담자의 치료를 위한 게임 공간을 조성하기 위한 연구의 일환으로 작성되었다. 초기에 외상을 입은 유아는 공격성과 망상, 분열과 우울, 통합된 자아감 결여, 감정 인식 능력 저하, 대상에 대한 강박적 집착, 사회 규범에 대한 반항, 현실 인식 능력 저하 등의 증상을 가상공간에 투사한다. 게임공간은 한편으로는 개인의 병리적 욕구를 드러내고 다른 한편으로는 자발적인 행동과 정서 경험을 촉구하는 양가적 공간이다. 게임공간의 현전성, 전능감과 무망감, 자아상의 분열, 감정의 이중성, 몰입감, 운동성 등의 특징들은 역기능적으로 또는 순기능적으로 활용될 수 있다.

• 한국경영과학회:학술대회논문집
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• 한국경영과학회/대한산업공학회 2003년도 춘계공동학술대회
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• pp.92-98
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• 2003

ISO 9000 is an efficient quality system for the customer's confidence and satisfaction. Of late years, the revised edition of ISO 9000 duality management system may give lots of positive business values to companies running ISO 9000 system Despite its tremendous popularity, there is some critisism against the effect and performance or ISO 9000 certification. This research explores the performances and effects of ISO 9000 quality system in small & medium size industrial companies. For this research, 202 companies certified by ISO 9000 standard and 67 companies not certified as contrast group were selected. The related data were collected by web-Poll survey. The major analyses are focused on the effect and performance or the ISO 9000 certification. and we established various hypotheses to verify the effect and performance or quality system. Results or statistical analyses show that total performance or qualify system is significantly different between certified companies and not certified.

• 한국의류산업학회지
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• 제10권5호
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• pp.721-730
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• 2008

The purpose of this study is to analyze the tech fatale fashion image in female models of mobile advertisements and to find the fashion characteristics. The tech fatale emerging as new culture code is a compound word of the femme fatale and technology. It is characteristics of the femme fatale, the post digital culture and the female leadership. The findings of the study were as follows : The tech fatale types were the independence, the transformation and the tradition. The independence was a self expression, appealed to visual image, was showed the coating fabric, denim, space look and street fashion and reflected the creativeness and digital generation. The transformation appealed to sexuality and was showed luster fabric, exposure, body-conscious, glam look. The voluptuous beauty represented the pride of the post digital generation. The tradition appealed to emotion and was showed pale color, simple line, soft texture fabric and a feminine Image. The meanings of tech fatale were the imagination, the public, the duality, the game, the purity and the recurrence. The formative characteristics reflect the mind of post digital generation who is against authority and pursues the human being worth such as the identity establishment and the pure emotion.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2002년도 학술대회지
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• pp.299-302
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• 2002

Characteristics of the twin fluid spray with ultrasonic forcing are examined in order to obtain the high efficiency of cold fog spray of the automatic pest control machine which has been widely used for the equipment cultivation recently. An electrostrictive vibrator of PZT BLT and a magnetostrictive vibrator of ${\pi}type$ with 28 kHz are applied as the ultrasonic transducer. All experiments are made and observed in 4 methods of spray ; a conventional spray method without ultrasonic forcing, an indirect vibration method with ultrasonic forcing, an improving duality method by ultrasonic forced within liquid, and a combined use method with both of the indirect vibration method and the improving quality method. In results, It was clarified that the ultrasonic effects the atomization of spray droplets and its efficiency is about $10{\%}$ and especially much more in the case of the combined use method.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2005년도 추계 학술대회논문집(수송기계편)
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• pp.186-189
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• 2005

Since human listening is very sensitive to sound, a subjective index of a sound quality is required. Therefore, in the analysis for each situation, the sound evaluation is composed with sound quality factor. Many researchers spends their effort to make a more reliable and more accurate of sound in term of sound quality index for various system noise. In this study a reliable index is constructed and analyzed using correlation analysis, regression analysis and weighting factor for each sound quality factor. We have made the sound quality index that agrees with more than human subjective sensitivity which apply to various sound quality metrics. Also we applied a 'grade' metric to jury for sound evaluation, analyzed relation between sound duality index and sound quality grade. Then we will judge the sound quality level according to the sound quality grade scheme.

• 대한방사선기술학회지:방사선기술과학
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• 제25권1호
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• pp.77-81
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• 2002

The purpose of this study is to examine quantitatively the relationship between visual image quality and degradation In spatial resolution for a gamma camera by the increase in distance from collimator. The relationship between the portion(p) of images identified the difference of image quality and the difference(${\Delta}FWHM$) in FWHM between paired images was showed in a sigmoid curve. Using Dendy's method, minimum level to be correctly identified the difference of Image duality on three out of four occasion(p=0.75) was corresponded to 0.4 mm in ${\Delta}FWHM$. Using fuzzy theory, the level to be identified the difference of image quality was examined under various conditions. The truth-value of fuzzy sets-degraded or slightly degraded and not-degraded in image quality between palled Images-was gained the peak at 0.5 mm of ${\Delta}FWHM$. It was founded that changes of $0.4{\sim}0.5\;mm$ in FWHM-corresponding about 2 cm distance from collimator could be sufficiently identified in the difference of image quality.

• 한국환경과학회지
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• 제9권3호
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• pp.267-273
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• 2000

In order to understand the impact for decomposition of blue-green algae Microcystis on water quality, the algae were cultivated with collection of natural population during approximately one month, when water-bloom of Microcystis dominated at August 31, 1999 in the lower part of the Okchon Stream. The enrichment of inorganic NㆍP nutrients didn't in algal assay and the effect of Microcystis on water duality was assessed from the variation of nutrients by algal senescence. Microcystis population seemed to play a temporary role of sink for nutrients in the water body. Initial algal density of Microcystis was 2.3×10/sup 6/ cells/㎖. When Microcystis population died out under light condition, algal NㆍP nutrients between 9∼12 days affected to increase of biomass after reuse by other algal growth as soon as release to the ambient water. However, cellular nutrients under dark condition were almost moved into the water during algal cultivation. NH₄, NO₃ and SRP concentration were highly increased with 160, 17 and 79 folds, respectively relative to the early. As a result, the senescence of Microcystis population seemed to be an important biological factor in which cause more eutrophy and increase of explosive algal development by a lot of nutrients transfer to water body. There are significantly observed an effort of reduce for production of inner organic matters such a phytoplankton as well as load pollutants from watershed in side of the water quality management of reservoir.