• 수산경영론집
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• 제32권1호
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• pp.1-14
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• 2001

The research on the price-volume relation in the market is very important because it examines into regular phenomenon revealed by market participants including producers and middlemen. The purpose of this study is to investigate the relationship between price and trading volume in the oyster producing market. In order to accomplish the purpose of this study, the contents of empirical analysis include the time series properties of price and trading volume, the short-term and long-term relationships between price and trading volume, and the determinants of trading volume. The data used in this study correspond to daily price and trading volume covering the time period from January 1998 to April 2001. The empirical results can be summarized as follows : First, price and trading volume follow random walks and they are integrated of order 1. The first difference is necessary for satisfying the stationary conditions. Second, price and trading volume are cointegrated. This long-run relationship is stronger from trading volume to price. Third, error correction model suggests that feedback effect exists in the long-run and that price tends to lead trading volume by about five days in the short run, that is, to be required period by digging, conveying, and peeling oystershell for selling oyster. Fourth, price and price volatility is a determinant of trading volume. In particular, trading volume is a negative function of price. It is believed that the conclusion drawn from this study would provide a useful standard for the policy makers in charge of reducing the oyster price volatility risk caused by trading volume(selling quantities).

• 한국경영과학회:학술대회논문집
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• 한국경영과학회 2000년도 추계학술대회 및 정기총회
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• pp.95-98
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• 2000

The rapid expansion of the WWW is well known and has huge potential for enabling companies, large and small, to gain new marketplaces globally at low cost, or to be disintermediated by others doing so. A totally new competitive environment opening up new opportunities is upon us. As a result, the electronic commerce is growing quickly and the importance of electronic marketplace is emphasized. From the view of SCM, applying the business-to-business electronic commerce to the relationship between firms is expected to make major changes. This study focuses on the effects of the introduction of web-based purchasing systems on the buyer-supplier relationship. We conduct a case study on the Korean firms The major findings of this study are summarized as follows. First, in introductory phase, some buying firms fail to design the appropriate mechanism for business relationships. It can weaken the cooperation between buyers and suppliers. Second, for critical or customized parts, it is possible to gather the information about potential suppliers and to make business relations using it. Third, using web-based purchasing systems, capable suppliers can take more opportunities to leverage its competence for business relations. So we can expect the positive feedback.

• 한국콘텐츠학회논문지
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• 제12권1호
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• pp.59-67
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• 2012

소프트웨어 변경관리는 시스템의 변경된 내용을 프로그램이나 설명문서와 같은 특정 개체의 특성 변경에 초점을 둔 것이다. 변경관리 시 요구사항간의 상호종속적인 관계를 가지고 최적의 상태를 위하여 복잡한 의사결정을 필요로 한다. 본 논문은 소프트웨어 변경관리를 분산환경에서 컴포넌트들간에 시간과 상황에 따른 변화를 관리하는 모델을 설계 한다. 그리고 각 컴포넌트들간의 관계성들에 대한 정의를 하고 ANP 기법을 이용하여 분산환경에서의 각 컴포넌트가 변화되어 참조되는 상호 의존성을 고려하여 종속관계와 피드백을 이용하여 최적의 대안을 선택할 수 있다. 즉, 서로간의 관계된 의존도를 분석하여 3가지 형태의 변경관계를 나타내도록 하였다. 또한 의존도 분석을 통해 이러한 접근 방법의 유효성을 검증하였다.

• 대한기관식도과학회지
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• 제4권1호
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• pp.73-78
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• 1998

The mutation of p53 is the most common genetic alteration found in human cancers and has oncogenic properties. mdm-2 is a recently discoverd that controls the p53 activity by binding of its protein, so negative feedback loop has been suggested in which p53 induces mdm-2 expression. The purpose of this study was to analyze the expression of p53 in leukoplakias, mdm-2 in squamous cell carcinomas, and relationship between p53 and mdm-2 expression in leukoplakias and squamous cell carcinomas. The results were as follows : 1) The p53 was expressed 33.4% in leukoplakias 2) The mdm-2 was expressed 8.3% in leukoplakias and 22.7% in squamous cell carcinomas. 3) The expression rate of p53 was higher in specimens negative for mdm-2 than in specimens positive for mdm-2, but there was not significant relationship between p53 and mdm-2 expression. In conclusion p53 was thought to participate in early phase of oncogenesis, and mdm-2 was thought to have a role as a oncogene in squamous cell carcinoma of head and neck. Though there was not significant relationship between p53 and mdm-2 expression, mdm-2 was thought to inhibit p53 activity.

• 한국컴퓨터정보학회논문지
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• 제24권5호
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• pp.139-147
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• 2019

This study is conducted to analyze how Social Media characteristics of restaurant franchise affect customer decision making and redelivery intention and find out how to do Social Media marketing which is getting important. Through this study, we will understand the direction of Social Media management. In this study, we had 220 users to respond questionnaires who looked up about restaurant franchise through Social Media. In the previous research, we classified the Social Media characteristics about the restaurant franchise into the fields of liveliness, agreement, reliability, communication, accuracy, and entertainment. In order to verify the hypothesis, we conducted single regression analysis and multiple regression analysis and verified the relationship between variables. First, we found that Social Media characteristics of restaurant franchise has a positive relationship with favorability. Second, Social Media characteristics of restaurant franchise has a positive relationship with satisfaction. Third, favorability has a positive effect on satisfaction. Fourth, favorability has a positive effect on the intention of re-inquiry and redeliver. Fifth, satisfaction has a positive effect on the revisit and intention to redirect. As a result of the study, we found that restaurant franchise will gain trust of customers if they take into account the characteristics of Social Media of restaurant franchise and conduct customized marketing according to the head office of restaurant franchise and perform continuous feedback and management in order to improve customer's favorability and loyalty.

• 정보처리학회논문지B
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• 제11B권6호
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• pp.625-632
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• 2004

H.264 부호화 기법은 단방향 및 양방향 예측 모드를 채택하고 있으며, 가변 길이 부호화를 사용하기 때문에 비디오 부호기에서 발생되는 데 이터량은 시간에 따라 변한다. 전송채널 용량이 제한된 고정 비트율 부호기에서는 출력 비트량을 제어하기 위해 버퍼가 사용되는데, 버퍼가 넘치거나(overflow) 고갈되는 것(underflow)을 막기 위해 발생 비트량을 적절한 영역 내에서 제한해야 한다. 기존의 비트량 제어방법 에서는 영상데이터의 왜곡 값과 양자화 계수간의 $\lambda_{MODE}$가 정규 값을 벗어나기 때문에 화질이 열화 된다. 본 논문에서는 H.264 동영상의 왜곡 값에 대한 새로운 양자화 계수론 도출하여 피드백 함으로써 버퍼의 넘침이나 고갈을 방지할 수 있는 알고리즘을 제안하였다. 제안한 기법을 6개의 실험데이터에 적용한 견과 PSNR 값은 기존 방법에서와 비슷하면서도 비트율은 최대 8%까지 감소하였다.

• 전기학회논문지
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• 제58권1호
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• pp.203-209
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• 2009

The purpose of this study is to develop a minimally constraint joint angle measurement system for the feedback control of FES (functional electrical stimulation) locomotion. Feedback control is desirable for the efficient FES locomotion, however, the simple on-off control schemes are mainly used in clinic because the currently available angle measurement systems are heavily constraint or cosmetically poor. We designed a new angle measurement system consisting of a magnet and magnetic sensors located below and above the ankle joint, respectively, in the rear side of ipsilateral leg. Two magnetic sensors are arranged so that the sensing axes are perpendicular each other. Multiple positions of sensors attachment on the shank part of the ankle joint model and also human ankle joint were selected and the accuracy of the measured angle at each position was investigated. The reference ankle joint angle was measured by potentiometer and motion capture system. The ankle joint angle was determined from the fitting curve of the reference angle and magnetic flux density relationship. The errors of the measured angle were calculated at each sensor position for the ankle range of motion (ROM) $-20{\sim}15$ degrees (dorsiflexion as positive) which covers the ankle ROM of both stroke patients and normal subjects during locomotion. The error was the smallest with the sensor at the position 1 which was the nearest position to the ankle joint. In case of human experiment, the RMS (root mean square) errors were $0.51{\pm}1.78(0.31{\sim}0.64)$ degrees and the maximum errors were $1.19{\pm}0.46(0.68{\sim}1.58)$ degrees. The proposed system is less constraint and cosmetically better than the existing angle measurement system because the wires are not needed.

• 한국콘텐츠학회논문지
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• 제15권12호
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• pp.185-192
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• 2015

이 연구는 생활임금제가 정책수단으로 어떠한 가치를 가지며, 왜 필요한지를 이해하기 위해 시스템사고 이론을 바탕으로 생활임금제와 경제변수들이 어떠한 상호연계성을 가지고 작동하는가를 분석하였다. 연구를 통해 얻어진 결과는 다음과 같다. 첫째, 생활임금제와 경제변수들의 관계는 상당한 수준에서 밀접한 상호작용을 보이고 있다는 점을 알 수 있었다. 특히, 노동자의 생활수준, 소비, 경기, 경제로 이어지는 상호피드백 작용이 긴밀하게 작동하고 있었다. 둘째, 생활임금제와 경제변수들의 피드백 구조는 크게 세 개의 양(+)의 피드백 루프가 작동하고 있었다. 이것은 생활임금제와 관련된 긍정적 경제변수가 성장할 수 있는 가능성을 가진 것으로 해석될 수 있다. 또한 최저임금제가 제 역할을 하지 못했다는 것으로도 이해할 수 있다. 이러한 연구결과를 통해 생활임금제는 정책수단으로 충분한 가치를 가지며, 생활임금제가 단순히 공공부문의 적용수준을 넘어 민간부문으로 확대되는 것이 바람직하며, 경제시스템에도 긍정적 변화를 이끌어 낼 수 있다는 교훈을 얻을 수 있었다.

• 한국문헌정보학회지
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• 제35권3호
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• pp.173-189
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• 2001

This paper presents a framework for observable behavior that can be used as a basis for user modeling, and it reports the results of a pair of user studies that examine the joint utility of two specific behaviors. User models can be constructed by hand, or they can be teamed automatically based on feedback provided by the user about the relevance of documents that they have examined. By observing user behavior, it is possible to obtain implicit feedback without requiring explicit relevance judgments. Four broad categories of potentially observable behavior are identified : examine, retain, reference, and annotate, and examples of specific behaviors within a category are further subdivided based on the natural scope of information objects being manipulated . segment object, or class. Previous studies using Internet discussion groups (USENET news) have shown reading time to be a useful source of implicit feedback for predicting a user's preferences. The experiments reported in this paper extend that work to academic and professional journal articles and abstracts, and explore the relationship between printing behavior and reading time. Two user studies were conducted in which undergraduate students examined articles or abstracts from the telecommunications or pharmaceutical literature. The results showed that reading time can be used to predict the user's assessment of relevance, that the mean reading time for journal articles and technical abstracts is longer than has been reported for USENET news documents, and that printing events provide additional useful evidence about relevance beyond that which can be inferred from reading time. The paper concludes with a brief discussion of the implications of the reported results.

• 예술인문사회 융합 멀티미디어 논문지
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• 제8권7호
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• pp.137-147
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• 2018

우리나라는 OECD 회원국 가운데에서도 정부규제의 수준이 가장 높은 나라들 중의 하나로 인식되고 있다. 정부규제가 강할수록 민간부문의 경제 및 각종 사회활동들이 위축되고 이러한 현상은 국가 경쟁력을 약화시키는 요인으로 인식되고 있다. 정부규제는 여러 가지 형태로 수행될 수 있는 바, 이러한 정부규제는 정부경쟁력에 영향을 미치고 정부경쟁력은 국가경쟁력에 영향을 미칠 수 있다. 본 연구에서는 정부규제와 국가경쟁력 간에 작용하는 많은 요소들을 인과관계론적으로 검토하고, 이를 시스템사고 관점에서 인과지도를 작성한다. 이를 통하여 정부규제와 국가경쟁력 간에 작용하는 피이드 백 루프를 탐색하고 향후 정부규제와 국가경쟁력이 균형을 이루면서 선 순환적으로 강화될 수 있는 정책적 제안을 하는데 연구의 목적이 있다. 연구결과 강화루프 (Reinforcing Loop) 2개와 균형루프(Balancing Loop) 4개가 각각 발견되었다. 이러한 루프들은 규제와 국가경쟁력간의 관계에서 실질적으로 중요한 역할을 하는 관계라는 점이며, 정책결정자 입장에서는 이러한 루프들을 잘 활용하여 양자간의 관계를 균형있게 발전시킬 수 있도록 노력할 필요가 있다는 점을 시사해 준다.