• 한국공작기계학회:학술대회논문집
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• 한국공작기계학회 2003년도 추계학술대회
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• pp.374-378
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• 2003

From linear motor feed system model, two axis control rules have been applied. As an application process, a flexible disk grinding system process has been also introduced that utilized varying disk orientation with respect to workpiece along with the applied feed speed. A known process model methodologies has been used to fomulate processed surface profiles. Various process conditions including cutting speed, maximum feed speed and orientation angles could applied to observe process results sensitivities. Even though continuous and constant feed speed has been applied to the process, the results from the trapezoidal input velocity profiles would be observed and compared.

• 방송과미디어
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• 제7권3호
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• pp.12-18
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• 2002

JVT는 ITU의 VCEG과 ISO의 MPEG이 공동으로 개발하고 있는 매우 높은 압축율을 주요 목표로 하고 있으며, 다양한 응용 환경에서 사용될 수 있는 범용 동영상 부호 표준이다. JVT는 2002년 1월 제네바회의에서부터 응용 코덱간의 호환성을 보장하기 위해 프로파일과 레벨에 대한 표준 규격을 제정해 왔다. 프로파일은 JVT를 구성하는 도구들의 부분 집합이며, 레벨은 디코더의 메모리 크기와 프로세싱 성능을 제한하는 것이다. 현재 JVT 최종위원회안 (FCD)의 프로파일은 베이스라인, 메인, 엑스(이름미정)의 3 종류의 프로파일이 있으며, 레벨은 계층적으로 구성되어 모든 프로파일에 공통으로 적용된다. JVT에 있어서 프로파일은 매우 중요한 의미를 갖는데, 그 것은 JVT의 표준 목표중의 하나가 베이스라인 프로파일을 특허 무료로 만드는 것이 때문이다. 베이스라인 프로파일의 특허료 문제는 현실적으로 상당한 난항이 예상되며, 표준의 성공에도 커다란 요인으로 작용할 것이다.

• 로봇학회논문지
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• 제18권4호
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• pp.444-455
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• 2023

In this report, a specialization plan for wearable robots by mission profile was investigated and analyzed to derive an application plan. The final goal of this study was to derive the operating requirements of wearable robots according to specialized plans, and to conduct a specialized study on wearable robots by mission profile through investigation/analysis of specialized plans for each mission profile. In the study, 1) Research on technology trends related to military wearable robots such as patents and papers, 2) Research/analysis of mission profiles to characterize wearable robots, 3) Analysis of wearable robot specialization plans according to mission profiles, and 4) Requirements for wearable robot operation were derived. In the first time of the study, a survey on technology trends related to wearable robots for soldiers such as patents and papers was completed, and a military consultative body was conducted to derive measures to characterize wearable robots. In addition, a survey was conducted on mission profiles, and the second time study derived Key Performance Parameters (KPP) for operational performance, core performance, and system performance based on scenarios by mission profile. However, it is revealed that the KPP derived from the research results was not covered in this paper because it was judged that more in-depth research was needed prior to disclosure. In order to prepare for future battlefield situations and increase the usability of wearable robots, this study was conducted to characterize wearable robots by considering the characteristics of soldiers' equipment according to mission profiles and to characterize wearable robots by mission profile.

• Journal of Ginseng Research
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• 제44권4호
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• pp.544-551
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• 2020

Background: Previous studies have shown the insecticidal efficacy of ginsenosides. In the present study, we aimed to investigate the metabolic mechanism related to the inhibitory effect of panaxadiol saponins (PDSs) against the Asian corn borer Ostrinia furnacalis (Guenee). Methods: Third instar larvae of O. furnacalis were fed normal diets with different concentrations of PDSs for 4 days. The consumption index, relative growth rate, approximate digestibility, and conversion of ingested and digested food were recorded. A targeted gas chromatographye-mass spectrometry assay was performed to detect the profiles of amino acids, fatty acids, and carbohydrates in larvae of O. furnacalis. In addition, the activity of detoxification-related enzymes was determined. Results and Conclusions: PDSs decreased the consumption index, relative growth rate, approximate digestibility, and conversion of ingested and digested food in the 3rd instar larvae of O. furnacalis in a dose-dependent manner. PDSs decreased 15 free amino acids, 16 free fatty acids, and 5 carbohydrates and increased the levels of palmitoleic acid, palmitic acid, and 9-octadecenoic acid in the 3rd instar larvae. The activity of detoxification-related enzymes, such as acetylcholinesterase, glutathione S-transferase, cytochrome P450, carboxylesterase, trehalase, acid phosphatase, and alkaline phosphatase, was reduced in a dose-dependent manner in the 3rd instar larvae exposed to PDSs. These data confirmed the inhibitory effect of PDSs against growth, food utilization, and detoxification in the 3rd instar larvae of O. furnacalis and the potential for using PDSs as an efficient tool for insect pest management for O. furnacalis larvae.

• 한국도서관정보학회지
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• 제39권4호
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• pp.353-376
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• 2008

본 연구의 주된 목적은 메타데이터 응용프로파일 설계에 필요한 분석 과정 방법론을 개발하고, 개발된 방법론에 따라 한국문화예술교육진흥원을 위한 총괄적인 메타데이터 응용프로파일을 설계하는 것이다. 분석과정은 기존 표준 메타데이터의 분석, 이용자 요구 분석, 콘텐트 분석으로 나뉘어 진행되었다. 각 과정을 수행하기 위한 방법론을 상세하게 기술하였으며 이와 함께 응용프로파일을 설계할 때 메타데이터 설계의 기본지침을 활용하였다. 이런 방법론을 문화예술교육진흥원 사례에 적용하고, 각 방법론이 메타데이터 요소 추출에 있어 어떤 역할을 하는지 논의하였다. 본 연구에서 개발된 체계적인 메타데이터 응용프로파일 설계 방법론이 향후 다른 도메인 응용프로파일 설계의 지침서로 활용될 수 있기를 기대한다.

• 한국정보과학회논문지:시스템및이론
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• 제37권3호
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• pp.127-137
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• 2010

다양한 과학 분야에서 대규모의 계산집중적인 어플리케이션들이 많은 그리드 자원을 활용해감에 따라 그 실행 관리와 제어의 어려움도 증가하였다. 어플리케이션의 반복되는 실행으로 축적된 작업 이력을 참조하여 어플리케이션의 특성을 파악하고 그리드 자원 선택 정책을 결정하였다. 본 논문은 그리드 컴퓨팅 환경과 이를 활용한 어플리케이션의 이력을 분석하기 위해 통계적 기법인 PBDF(Plackett-Burman with Fold-Over)계획법을 적용하였다. PBDF는 그리드 환경과 어플리케이션에서 주요한 요인들을 파악하고, 그것들이 얼마만큼 영향을 미치는 가를 수치화한다. 영향력 큰 요인은 작업 이력에서 참조 프로파일을 찾고 적절한 자원을 선택하는데 사용하였다. 응용의 수행 결과를 다시 작업 이력에 포함시키고 인자의 신뢰도를 조정하였다. 본 연구는 항공우주 연구 그리드의 작업 이력을 분석하여 적응형 자원 선택 알고리즘을 제안하였다. 주요한 요인들의 영향력을 계산하고 자원 선택 정책에 반영하는 실험을 하였다. 또한, 수행이 끝난 후 인자의 신뢰도를 평가해 그리드 환경 변화에 적응하는 알고리즘의 유효성을 검증하였다. 오류가 빈번한 그리드 환경에서 자원 선택 기법을 평가하기 위해 다양한 시나리오에서 그 적응력을 실험하였다.

• International Journal of Computer Science & Network Security
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• 제21권2호
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• pp.171-180
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• 2021

Currently, hospitals and medical practices have a large amount of unstructured information, gathered in time at each ward or practice by physicians in a wide range of medical branches. The data requires processing in order to be able to extract relevant information, which can be used to improve the medical system. It is useful for a physician to have access to a patient's entire medical history when he or she is in an emergency situation, as relevant information can be found about the patient's problems such as: allergies to various medications, personal history, or hereditary collateral conditions etc. If the information exists in a structured form, the detection of diseases based on specific symptoms is much easier, faster and with a higher degree of accuracy. Thus, physicians may investigate certain pathological profiles and conduct cohort clinical trials, including comparing the profile of a particular patient with other similar profiles that already have a confirmed diagnosis. Involving information technology in this field will change so the time which the physicians should spend in front of the computer into a much more beneficial one, providing them with the possibility for more interaction with the patient while listening to the patient's needs. The expert system, described in the paper, is an application for medical diagnostic of the most frequently met conditions, based on logical programming and on the theory of probabilities. The system rationale is a search item in the field basic knowledge on the condition. The web application described in the paper is implemented for the ward of pathological anatomy of a hospital in Romania. It aims to ease the healthcare staff's work, to create a connection of communication at one click between the necessary wards and to reduce the time lost with bureaucratic proceedings. The software (made in PHP programming language, by writing directly in the source code) is developed in order to ease the healthcare staff's activity, being created in a simpler and as elegant way as possible.

• 한국전산유체공학회지
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• 제8권2호
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• pp.42-48
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• 2003

The issues associated with the application of CFD for ship design are addressed. Doubtlessly at the moment, CFD tools are very useful in evaluating hull forms prior to traditional towing tank tests. However, time-consuming pre-processing is an obstacle in the daily application of CFD tools to improve hull forms. The accuracy of computational modeling without sacrificing the usability of CFD system is also to be assessed. The wave generation is still predicted by using potential panel methods, while velocity profiles entering into propeller plane is solved using turbulent flow solvers. The choice of turbulence model is a key to predict nominal wake distribution within acceptable accuracy. The experimental data for CFD validation are invaluable to improve physical and numerical modeling. Other applications of CFD for ship design than hull form improvement are also given. It is certain that CFD can be a cost-effective tool for the design of new and better ships.

• Journal of information and communication convergence engineering
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• 제18권3호
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• pp.194-200
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• 2020

Cities in Indonesia include diverse scattered industrial centers comprising industries that can sustain the existing economic pace. For industrial data collection, the city government still relies on census that consumes extensive time and money. The public are unfamiliar with industries owing to their lack of industry information; therefore, the market share is not optimal. In addition, the opportunity to procure investors for business development is limited. A Geographic Information System (GIS) is a computer system that can record, store, write, analyze, and display geographical data. Using the Rapid Application Development (RAD) method, GIS was developed on a website platform to provide information on industry profiles, types of production, investment values, industry maps, and industrial locations in each village and sub-district to a wider community. The RAD method was chosen compared to the waterfall method because it could accelerate website development process.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2002년도 학술대회지
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• pp.5-8
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• 2002

The issues associated with the application of CFD for ship design are addressed. It is quite certain that the CFD tools are very useful in evaluating hull forms a prior to traditional towing tank tests. However, the time-consuming pre-processing is an obstacle in the daily application of CFD tools to improve hull forms. The accuracy of computational modeling without sacrificing the usability of CFD system is also to be assessed. The wave generation is still predicted by using potential panel methods, while velocity profiles entering into propeller plane is solved using turbulent flow solvers. The choice of turbulence model is a key to predict nominal wake distribution within acceptable accuracy. The experimental data for CFD validation are invaluable to improve physical and numerical modeling. Other applications of CFD for ship design than hull form improvement are also given. It is certain that CFD can be a cost-effective tool for the design of new and better ships.