• Journal of applied mathematics & informatics
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• 제7권2호
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• pp.409-438
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• 2000

In this paper we develop a new procedure to control stepsize for Runge- Kutta methods applied to both ordinary differential equations and semi-explicit index 1 differential-algebraic equation In contrast to the standard approach, the error control mechanism presented here is based on monitoring and controlling both the local and global errors of Runge- Kutta formulas. As a result, Runge-Kutta methods with the local-global stepsize control solve differential of differential-algebraic equations with any prescribe accuracy (up to round-off errors)

• 생물정신의학
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• 제5권2호
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• pp.175-183
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• 1998

To consider current concepts of epilepsy further, the brief review begins with a discussion of what is epilepsy, discribes multifactorial nature of epileptic disorders, and ends with a presentation of current classifications. A combination of the standard antiepielptic drugs(AEDs) may be necessary to treat intractable seizures, but no studies have been done to indicate an optimal combination. The new AEDs provide alternative choices, but questions remain about the optimal timing and manner of administration. AEDs selection must individualized, no drug of choice can be named for all patients.

• Journal of Astronomy and Space Sciences
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• 제7권2호
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• pp.73-103
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• 1990

Morphological luminosity parameters$(\mu_e,\;r_e,\;\mu_0,\;\alpha^{-1})$ and D/B were estimated from the decomposition of surface brightness distributions of 28 extra galaxies. Decomposition was made using the standard non-linear least square fitting method and we used the seeing convolved model to get the central brightness of these galaxies. Masses and $M/L_B$ were calculated using rotational velocities of these galaxies from the fitting to the generalized Toomre's mass model.

• 한국산업보건학회지
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• 제30권3호
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• pp.280-291
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• 2020

Objectives: Hazard classification is a controversial issue in the new MSDS system in which chemical companies have to prepare and submit MSDS for chemicals that they manufacture or import to the competent authorities according to the amended Occupational Safety and Health Act. The aim of this study is to suggest how to apply and manage harmonized hazard classification criteria and results by investigating current hazard classification systems and trends. Methods: The domestic issues about different hazard classification criteria and results were investigated by reviewing the literature and business outcomes regarding KOSHA. We also checked official and unofficial reports from the UN to understand international discussion about the topic. Chemical hazard classification results from agencies providing chemical information were analyzed to compare a harmonized rate between classifications. Furthermore, a field survey of a few chemical companies was conducted. Results: Under the related competent authorities, an integrated standard proposal was developed to harmonize the domestic hazard classification criteria. Although harmonized chemical information is strongly needed, we recognized the uncertainty and difficulty of harmonized hazard classification from the UN global list project review. In practice the harmonization rate of the classification was generally low between the classification in KOSHA, MoE, and EU CLP. Among hazard classes, health hazards largely led the disharmony. The field survey revealed a change of perception that the main body of chemical information production is manufacturers. Approaches and solutions about hazard classification issues differed depending on business size, types of chemical handling, and other factors. Conclusions: We proposed reasonable ways by time and step to apply hazard classification in the new MSDS system. Chemical manufacturers should make and offer chemical information including responsible hazard classifications. The government should primarily accept these classifications, evaluate them by priority, and support or supervise workplaces in order to communicate reliable chemical information.

• 한국전산구조공학회논문집
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• 제33권2호
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• pp.73-79
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• 2020

BIM 도구는 설계프로세스에서 기술의 사용이 증가하면서 그에 따른 정보표준체계가 필요하게 되었다. 건설이 완료된 결과(Result) 분류는 25종 단위시설에 327종의 유형, 결과를 구성하는 객체는 174종의 Part와 207종의 Component로 분류하고 있다. 선행연구에서는 도로와 하천 분야 대상으로 속성분류체계를 대분류 4종, 중분류 13종, 소분류 58종, 속성정보 333종으로 분류하였고, 객체분류에 따른 대량의 속성정보를 입력하는 것의 소요 시간을 줄이는 것이 관건이었다. 따라서, Revit 플러그인과 같은 외부 응용 프로그램 개발을 통해 구체적이고 반복적인 작업에 자동화가 필요하다. BIM 속성분류체계를 따르면서 사용자의 생산성과 편의성을 강화할 수 있는 BIM 속성입력 프로그램을 구현하였다.

• 대한치과교정학회지
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• 제21권1호
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• pp.171-183
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• 1991

This investigation was designed to categorize Angle's class II malocclusion groups through analyzing horizontal and vertical components of craniofacial skeleton in Angle's class II malocclusion. The material selected for this study consisted in standard lateral cephalogram of two hundred and twenteen children, eighty eight boys and one hundred twenty four girls, aged 6 through 18 years, having Angle's class II malocclusion. On the basis of findings of this study, the following results were obtained. 1. In horizontal skeletal classifications, 16 groups were classified according to FMN-A-B, SE-FMN-A, Ba-SE-Me, Ba-Se/Ra P. The sequences that have relatively high frequency are as follows: a) Horizontal Group 16 b) Horizontal Group 12 c) Horizontal Group 13 d) Horizontal Group 9 & 15 2. In vertical skeletal classification, 8 groups were classified according to the PMV/PP, PMV/Occ. P. PMV/Mn. P. The sequences that relatively high frequency are as follows; a) Vertical Group A b) Vertical Group D c) Vertical Group C d) Vertical Group H 3. In vertical and horizontal skeletal classifications, the sequence that relatively high frequency are as follows; a) Group13-A b) Group16-A & 9-A c) Group12-A & 15-A d) Group16-C

• 혜화의학회지
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• 제8권1호
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• pp.97-114
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• 1999

By studying disease classifications of oriental medicine from Nei-Ching, Chao's-Bing-Yuan, Dong-Yi-Bao-Jian and Korea-standard classification of causes of disease & death. The results were obtained as follows : 1. In Nei-Ching 181 kinds, Chao's-Bing-Yuan 1729 kinds, Dong-Yi-Bao-Jian 966 kinds, and Korea-standard classification of causes of disease & death 2519 kinds of diseases, which suggested more diseases as time flew. 2. In classical books such as Nei-Ching, Chao's-Bing-Yuan, and Dong-Yi-Bao-Jian most of diseases and their names were originated from six kinds of pathogenic factors, Zang-Fu, Jung-Qi-Blood-Fluid, soul, and outer-body-signs, while Korea-standard classification of causes of disease & death classified diseases according to oriental medical departments. 3. Symptoms of Cold-Heat-Excess-Deficiency and pathogenic factors, body parts, Zang-Fu were applied to names of diseases in oriental medicine. 4. In oriental medicine, some symtoms, many intermal diseases were used as disease name, but it is necessary for us to select exact name of diseases in modem clinical treatment. 5. We should consider disease names in Korea-standard classification of causes of disease & death in relations with western medical terms of diseases.

• 한국실내디자인학회논문집
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• 제22권1호
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• pp.211-221
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• 2013

As the result of investigating domestic interior design (interior architecture) field-related laws, it was found that interior design (interior architecture) is not recognized as in independent area due to weak classification standards by Korean standard industrial classification and job classification. Korean standard industrial classification is applied as a standard setting limits to applicable targets and industrial fields for laws related to general administration and industrial policy other than various statistic purposes. Also, the standard industrial classifications regarding the industry field determines the laws or applicable tax rates, government support and such according to the classification, and thus is very important. Moreover, interior architecture field is largely different from general architecture due to specialization and distinct characteristics, but due to the comprehensive concept of architecture industry regulations, it is considered the proper assessment for the professionalism is not conducted. Also, interior architecture field has irrational contradictions that is not independent with a clear definition and industry field classification not only in legal system and trade customs. Therefore, The following is proposed as the plan to strengthen the domestic/international competitiveness and system improvements for interior architecture. (1)interior design (interior architecture) must be amended as an industrial classification that can coexist with architecture. (2)interior design (interior architecture) must be amended as a job classification that can coexist with architecture. (3)Among the design tasks of an architect, approval for the design task field of interior architecture field must be legislated. -In architect design standard contract (the existing architecture design task scope and quality standard table) of a structure, among the tasks by request of the owner, (1)interior design tasks shall be legislated. It should be legislated so that interior design (interior architecture) majors can be included as well. (4)The task field of interior design that coexists with design must be amended. (5)National contract law - among contract method by negotiation, specialty item must be vitalized.

• 디자인학연구
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• 제12권2호
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• pp.43-50
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• 1999

생활수준 향상으로 도시민의 옥외휴식과 여가를 즐기는 시간들이 늘어나고 있다 따라서 여가를 위한 대표적인 시설인 도심공원에는 여러 가지 형태의 휴식공간이 조성되며 이곳에는 휴식과 관련된 퍼골라, 벤치, 휴지통, 조명기기 등과 같은 휴게시설물이 다수 설치지기 마련이다. 그리고 이와 같은 휴게시설물은 공원에서의 휴식을 즐기는 이용자들의 기본적인 시설이라고 할 수 있다. 휴게시설물은 공원의 분위기와 이용자의 욕구를 충족시킬 수 있게 개발되어져야 하고 또한 한국적 문화에 맞는 이미지를 적용하여 적당한 장소에 배치되어야 한다. 그러나 공원을 계획할 때 이와 같은 점을 간과하고 이들 휴게시설물의 위치나 디자인을 타성적이고 편의적인 설계에 의하여 공원 이용자들의 시각적 만족감 결여와 불편함을 주는 경우가 많이 있으며 또한 법적 규제가 미흡한 실정이다. 본 연구는 여가를 즐기기 위한 대표적인 시설물인 도심공원 안에 벤치의 현황을 파악하여 표준치수론 제시함으로서 디자이너가 참고로 활용 할 수 있도록 하는데 있다. 이를 위해 우리나라의 대도시 6곳을 선정하여 도심에 있는 공원 벤치의 크기를 조사하였으며 미국, 일본 및 한국에서 표준이라고 적용하는 치수와 비교, 분석하였다. 또한 현재 한국 성인 남, 여 신체치수를 검토하여 새로운 표준치수를 제시함으로서 좀 더 인간을 위한 시설물로 자리를 잡아 나아갈 수 있도록 하였다. 또한 일원화 되어있는 현재의 벤치를 크게 이원화하여 성인용과 어린이용으로 분류하여 제시하였다. 본 연구에서는 벤치의 표준치수만을 제시하였지만 앞으로 배치, 재료 및 형태 등에 대하여 연구되어 이용자 중심으로 한 휴게시설물이 계획되어야 할 것이다. 더 나아가 휴게시설물 전반에 대한 검토도 이루어져야 할 것이다.

• 방사선산업학회지
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• 제9권1호
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• pp.29-35
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• 2015

Radiation technology is the one for developing new products or processes by applying radiation or for creating new functions in industry, research and medical fields, and its application is increasing consistently. For securing an advanced technology competitiveness, it is required to create a new added value by information consumer through providing an efficient system for supporting information, which is the infrastructure for research and development, contributed to its collection, analysis and use with a rapidity and structure in addition to some direct research and development. Provision of the management structure for information resources is especially crucial for efficient operating the system for supporting information in radiation technology, and then a standard classification structure of information must be first developed as the system for supporting information will be constructed. The standard classification structure has been analyzed by reviewing the definition of information resources in radiation technology, and those classification structures in similar systems operated by institute in radiation and other scientific fields. And, a draft version of the standard classification structure has been then provided as 7 large, 25 medium and 71 small classifications, respectively. The standard classification structure in radiation technology will be developed in 2015 through reviewing this draft version and experts' opinion. Finally, developed classification structure will be applied to the system for supporting information by considering the plan for constructing this system and database, and requirements for designing the system. Furthermore, this structure will be designed in the system for searching information by working to the individual need of information consumers.