• Proceedings of the Korean Institute of Intelligent Systems Conference
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• 2001.12a
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• pp.113-116
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• 2001

This paper describes an analysis of the music as a time series and the fuzzy logic-based modeling of it. All music is made up of a finite number of musical notations known as the musical symbols, such as clefs, staff, tine signature, notes, rests, etc. . The musical score uses musical symbols to present various characteristics, such as rhythm, melody, chord, etc,. for interpreting the music. In this paper, it is possible to transform the beat and pitch in the musical into time series from the viewpoint of recognizing beat and pitch of sounding tone at each time. On the basis of the identified features of the musical score, a musical score is represented as a time series and then is constructed to fuzzy logic-based model for predicting them. Examples are presented to illustrate the validity of the proposed method.

• Journal of the Korea Safety Management & Science
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• v.10 no.3
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• pp.155-166
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• 2008

Advanced countries worldwide lead government leading management innovation by suggesting unique managing system which can be survived in global economy war including JQA of Japan and EFQM of Europe based basically on MBNQA of U.S.A. and by rewarding to suitable companies. Mckinsey, global management and consulting company points out that Korea has no management because Korean productivity level which dependence to small and medium sized companies is high by the limitation of elemental invests leading type growth strategy including labor and capital is only 1/2 of U.S.A. and 2/3 of Japan. In particular, the competitive power of Korean small and medium sized companies goes into a recession by productivity lowering according to the chinese follow-up, laboring time shortening, variety and aging, and fundamental management innovation activities for reinforcing survival and competitive power are needed. Therefore, in this study, we try to construct the model of productivity managing system of innovation type small and medium sized companies which make excellent results.

• Journal of the Korea Safety Management & Science
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• v.11 no.2
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• pp.145-152
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• 2009

As the industry develops, the amount of wastes is increasing in the economic system with various needs. As a result, the environmental problems are emerging as serious social issues and all the parties are required to make their best efforts. Among the issues proposed as the environmental issues, the logistics-related issues are exhaustion of the resources, global warming, environmental pollution, and acidification and so on. In order to respond to the environmental issues of the earth, the advanced countries are setting retrenched goals, reduction of the new greenhouse gases and accomplishment of retrenched goals by cooperation between the nations. Economic activities inevitably bring environmental problems and logistics is implementing those activities. The companies should perform the roles to resolve the environmental problems as the main cause of environmental pollution. Therefore, along with spreading recognition of social demand, the companies are required to establish policies regarding the environment and they should approach the issues from the perspective of resource circulation. These environment-friendly activities are emerging as the new source of competitiveness in the logistics field. Therefore, this study analyzes the effects of environment-friendly logistics activities on the reduction of logistics cost to reduce and resolve the environmental issues such as environment preservation, recycling and so on.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2008.10a
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• pp.410-414
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• 2008

음악 연구에 따른 컴퓨터의 역할이 점차 중요한 비중을 차지함에 따라 보다 효과적인 악보 인식 방법이 요구된다. 기존의 악보 인식 방법에서는 특정 수정 프로그램에서 만든 악보만 그 프로그램에서 재수정과 재생이 가능하다는 단점이 있다. 본 논문에서는 이러한 단점을 보완하기 위하여 이미 작성 되어있는 악보들을 자동으로 인식하고 재생을 할 수 있는 방법을 제안한다. 제안된 악보 인식 방법은 수평 히스토그램을 이용하여 악보 이미지의 오선을 제거한 후, Grassfire 알고리즘을 적용하여 잡음을 제거하고 악보 구성 기호들을 추출한다. 추출된 악보 구성 기호들은 악보 구성 기호의 특징을 이용하여 음표와 쉼표, 그 외의 기호들로 분리한다. 분리된 음표 기호들은 박자마다 다른 음표 형태의 특징을 이용하여 다시 세밀하게 분리하고 쉼표와 그 외의 기호들은 퍼지 ART 알고리즘을 적용하여 인식한다. 인식된 악보 구성 기호들을 이용하여 각각 정보를 저장하고 향후에 악보 구성 기호에 해당하는 음의 재생을 용이하게 한다. 제안된 악보 인식 방법의 성능을 평가하기 위해 50장의 악보 영상을 대상으로 실험한 결과, 본 논문에서 제시한 악보 영상의 인식 방법이 실험을 통해서 효율적인 것을 확인하였다.

• Environmental and Resource Economics Review
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• v.15 no.1
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• pp.51-69
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• 2006

This paper analyze the degree of competitiveness of the refining industry after price liberalization. We use two well-known methods: the first is Bresnahan (1982) and Lau (1982) method that estimates a structural model consisting of a demand relation and supply relation and the second is Panzar and Rosse (1987) method that estimates non structural model of the sum of elasticities of gross revenue with respect to input prices. Results from two models show mixed sign, however, our results indicate that price liberalization improved the degree of competitiveness.

• Journal of the Korea Safety Management & Science
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• v.14 no.2
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• pp.159-166
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• 2012

As enterprises, based on the forecast of the customer's demand and collaboration with the suppliers, establish the integrated system directing supply, production, and distribution for the increase of productivity, Thus, this study intends to find the most urgent and critical factors for the improvement of the information system by externalizing factors affecting the operation of information system, suggest the process to improve the relevant functions of information system, and design the process. As a result of the analysis of the previous studies on the improvement of the information system, many studies were conducted on the improvement of ERP and SCM, yet there was no study conducted targeting about APS (Advanced Planning & Scheduling). Thus, this study chose APS as the subject for the design of the process for the improvement for the information system.

• Proceedings of the Safety Management and Science Conference
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• 2006.11a
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• pp.531-536
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• 2006

최근의 물류환경은 유통시장의 개방과 세계시장의 단일화로 국제적인 경쟁환경에 노출되어 글로벌화와 정보화 경쟁이 가속화되고 있으며 국내적으로는 대형 유통업체의 공격적인 마케팅 전개로 중소유통업체의 생존권을 위협하고 있다. 또한 물류부문의 아웃소싱화 추세가 증가하고 있으며 대형소매점 위주의 유통구조재편과 편의점들간의 규모의 경쟁 추구에 따른 지역상권 장악이 가속화되어 중소물류업체들의 경쟁력이 급속히 하락하고 있는 추세이다. 특히 대형할인점 위주의 대형 유통업체가 상당부분의 지역상권을 장악해가고 있지만 중소유통업체들은 여전히 구매력과 판매력이 미흡한 상황이며 유통 물류체계 또한 대기업 위주의 편향적인 구조로 되어 있어 상대적으로 영세하고 정보화가 취약한 중소물류업체들의 공도물류사업을 통한 가격경쟁력 강화 등의 필요성이 제기되고 있으며, 합리적인 유통 물류시스템구축이 필요한 실정이다. 그리고 전국 유통 물류시설의 기능들이 상호 연계되지 못하여 상호 중복되고 본래의 기능을 발휘하지 못하는 등 유통 물류시스템의 정보화, 체계화가 미흡한 상황에서 중소유통 물류공동화의 대안으로서 공동도매물류센터가 필요하며 이를 통해 유통 물류시설간의 전국 네트워크화를 실시하고 공동구매, 공동판매 및 조직화 등을 통해 시너지효과가 발휘될 수 있는 중소물류산업에 대한 활성화 방안의 모색이 절실히 요구되고 있다.

• Journal of the Korea Safety Management & Science
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• v.10 no.1
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• pp.91-105
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• 2008

Nowadays, circulation industry is taking charge of important role in improvement of competitive power on the manufacturing industry and public welfare increase of consumer, price stabilization, employment creation and so on. A lot of research have been progressing for formation of total circulation complex, but decision making for selection of location on some facility is only calculated the optimum value when correct data values are inserted. However, a lot of decision making is accomplished in situation that have little knowledge of objective and constraints and as real world is also evaluated inclusive of analyst's subjectivity about variable, indefinite and fuzzy part, so it is decreasing a reliability on evaluation result and complicating objective evaluation on various effect and negative impact. Accordingly, from under like this situation, this study is to develop location decision model of circulation complex using fuzzy theory from the intention for the most reasonable decision making in fuzzy situation based on decision making problem on conventional location and size decision that did to be satisfactory constraints necessarily.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.9 no.3
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• pp.37-43
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• 2009

In this paper, we proposed that a novel method base on a binary image that technique is proposed for data hiding into binary images and halftone image. A binary image is bitmap image and halftone is composed by two-tone value in a limited region in an image. For this reason, it is not easy to hide messages in binary images. PWLC is a new method to hide a message in binary images. However, it yields images of unacceptable quality, unless you should change very few of it. Therefore, in order to solve this problem, we used run-length method into binary images. That is, we find a proper region to hide messages. In this paper, we proposed new method to hide messages in binary images. In addition, we proved that our algorithm is better than PWLC through the experiment.

• Journal of the Korea Safety Management & Science
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• v.13 no.2
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• pp.77-82
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• 2011

In the industrial site of 21st century, there are many and various powders of material, product and fuel of coal, chemical, detergent, paint, feed and more. Therefore, there always is a possible danger of dust explosion in each and every procedure and actually, there are increasing frequency of dust explosion as the use of dust and its amount increases in processes. Therefore, if we leave the current status like now, the unexpected massive dust explosion and its risk cannot be effectively prevented so there has to be effective application of understanding and development of explosion-prevention technology about dust explosion. Therefore, this research set the limit of research to systematically arrange the research results about dust explosion phenomenon and its prevention up to date and has its purpose to theoretically establish the prevention technology about dust explosion based on these theories.