• 대한안전경영과학회지
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• 제15권1호
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• pp.293-301
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• 2013

The purpose of this study is to introduce the limit of previously used six sigma quality process evaluation metrics, $Z_{st}$ and $P_{pk}$, and a solution to overcome this drawback by using a metric based on performance evaluation of Z-factor quality innovation. Case analysis on projects from national six sigma contest from 2011 to 2012 is performed and literature review on new drug development HTS (High Throughput Screening) is used to propose innovative performance evaluation metrics. This research shows that experimental study on six sigma evaluation metric, $Z_{st}$ and $P_{pk}$, have no significance difference between industrial type (Manufacturing, Semi-Public Institute, Public Institute) and CTQ type (Product Technology Type CTQ, Process Technology Type CTQ). Following discovery characterize this quality improvement as fixed target type project. As newly developed moving target type of quality innovation performance metric Z-Factor is used for evaluating experimental study, hypothetical analysis suggests that $Z_{st}$ and $P_{pk}$ share different relationship or even show reciprocal relationship. Constraints of the study are relatively small sample size of only 37 projects from past 2 years and conflict on having interview and communication with six sigma quality practitioner for qualitative experimental study. Both moving target type six sigma innovation project and fixed target type improvement project or quality circle enables efficient ways for a better understanding and quality practitioner use by applying quality innovation performance metric. Downside of fixed target type quality performance evaluation metric, $Z_{st}$ and $P_{pk}$, is presented through experimental study. In contrast, advantage of this study is that high throughput requiring product technology, process technology and quantum leap typed innovation effect is evaluated based on precision and accuracy and Z-Factor that enables relative comparison between enterprises is proposed and implemented.

• 한국석유지질학회지
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• 제1권1호
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• pp.47-52
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• 1993

지진파의 전파속도와 감쇠정도가 불균질한 매질에서 2차원 지진파 단면자료에 대한 주파수-파수 영역에서의 구조보정 방법 및 그 결과를 제시한다. 파동전파의 감쇠효과를 포함시키기 위해 일반화된 주파수-파수 구조보정 방법을 개선하여 파동장의 상향 및 하향 외삽연산자에 복소수 전파속도를 사용한다. 이 복소수 전파속도의 허수 부분은 지진파 감쇠 척도인 Q 값을 포함하도록 한다. 불균질한 전파속도와 비탄성을 가진 매질 속에서의 전파방정식의 해를 얻기 위해, 불균질한 매질자체를 일정한 전파속도와 비탄성을 갖는 평균적 매질과 가상적 파동원의 불균질한 분포로 규합된 등가의 시스템으로 취급한다. 가상적 파동원은 전파속도와 매질비탄성의 불균질 정도에 따라 그 세기가 좌우된다. 이 방법에 의해 수 개의 구조 모델에 대해 수치적으로 계산된 결과는 기존의 일반화된 파수-주파수 구조 보정 방법에 의한 것보다 더욱 선명한 단면 영상을 보여주며 파의 비탄성에 의해 불명확하게된 영상신호가 복원된다. 이 방법은 석유나 천연가스가 부존된 구조 또는 파쇄대가 존재하는 지역에서 획득된 자료를 구조보정하는데 유용하게 쓰일 것이다.

• 근관절건강학회지
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• 제4권2호
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• pp.197-220
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• 1997

The lack of a comprehensive theory describing the mechanism of adaptation scientifically has been one of the limiting factors for the development of nursing intervention of patients with chronic illness. Since Roy's theory provides the general conceptual framework depicting adaptation process with structural stimuli and control mechanism, it is appropriate to understand the process of adaptation. But in Roy's theory, the propositions about cognator and regulator as control mechanisms are not clearly defined. For this reason, most of the previous researches applying the Roy's theory have disregarded the study of cognator and regulator. For the patients with chronic illness such as rheumatoid arthritis, it was reported that adaptation states were different for the same stimuli due to the difference of the control mechanism. Moreover in nursing it is important to identify the control mechanism which can be and must be intervened by nurses. It was the Lazarus and Folkman's theory that proposed the control mechanism. They suggested that individual differences in the reaction against the perceived stress are due to the difference in appraisal and coping. Therefore, the synthesis of Roy's and Lazarus and Folkman's propositions might help to clearly understand the mechanism of adaptation. From this point, a theoretical framework has been developed and tested. The subjects were the 297 patients who had been diagnosed rheumatoid arthritis and attended the outpatient clinic. A hypothetical prediction model of adaptation was tested by the covariance structure analysis with PC-LISREL 7.13. As a result, the overall fit was good($x^2$=78.83, p=0.00 ; GFI=0.96 : AGFI=0.90 ; RMR=0.04) for the hypothetical model. In the final model added GA(5, 1), the overall fit was increased ($x^2$=57.82, p=0.003 ; GFI=0.97 ; AGFI=0.93 : RMR=0.036). Except the fact that illness symptoms affected physical adaptation directly, it was supported that focal and contextual stimuli affected physical and psychosocial adaptation through appraisal and coping. Therefore, it was asserted that the synthesis of two theory's propositions was appropriate. So this model would be useful for the theoretical framework in the nursing practice. And this study synthesizing and testing the theory might contribute to establish nursing's scientific base.

• 한국과학교육학회지
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• 제23권3호
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• pp.215-228
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• 2003

이 연구는 과학철학에서 논의되어온 과학의 선언적 지식의 생성 과정을 보다 체계적으로 분석하고 정리하여 하나의 구조화된 과학적 지식의 생성 모형을 제시하고자 하였다. 이를 위해, 이 연구는 선언적 과학 지식의 생성 과정을 과학철학적 관점들을 중심으로 다양한 문헌들을 분석하고, 이러한 분석 결과를 바탕으로 과학적 지식의 생성 모형을 체계적으로 구조화하였다. 이를 통해 고안된 모형은 귀납적 과정, 귀추적 과정, 연역적 과정 등으로 구분되는 지식 생성 과정을 포함한다. 또, 각각의 과정은 다시 여러 단계의 하위 과정으로 구성되어 있음을 보여준다. 이 모형에 의하면, 먼저 귀납적 과정은 관찰과 규칙성 발견 과정으로 구분되며, 다시 관찰은 단순관찰과 조작관찰로 나뉘고, 규칙성발견은 공통점발견, 분류, 위계 발견 등으로 세분된다. 그리고 귀추적 과정은 의문 생성과 가설생성 과정으로 구분되며, 여기에서 가설생성과정은 다시 의문상황 표상, 경험상황 동정, 원인적설명자동정, 가설적설명자 동정 등의 과정으로 나뉘어 진다. 마지막으로 연역적 과정은 방법 기준의 고안 과정은 다시 가설의 검증방법 고안과 가설의 평가기준 고안으로, 가설평가 과정은 결과수집 과정과 가설평가 및 결론 진출 과정으로 세분된다.

• Journal of Oral Medicine and Pain
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• 제45권4호
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• pp.97-109
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• 2020

Purpose: Cervicogenic headache (CGH) is pain referred to the head/ face from the structures in vicinity of upper cervical spinal nerves via trigeminocervical pathway. Ponticulus Posticus (PP) and Elongated Styloid Process (ESP) are anatomical structures that cause compression of vasculature present around upper cervical nerve plexus. Recently, computational fluid dynamics (CFD) has shown to play an essential role in identification of these high-pressure zones in the brain. The aim of this research is to study the association of ESP and PP in patients with CGH and to develop a hypothesis by CFD to analyse vertebrobasilar insufficiency as a contributing factor in occurrence of CGH. Methods: Retrospective analysis of 4500 full skull CBCT scans was done for the presence of partial or complete PP and length of Styloid Process (SP). Research was divided into two phases; In first Preliminary Phase, 150 scans that showed the presence of PP and ESP were analysed, and only 134 patients gave consent to fill the questionnaire containing 96 question items pertaining to symptoms associated with CGH. In the second phase, simulation of Vertebral and Carotid Artery was done using Fluent 14.5 Software and by CFD, pressure distribution on arteries was obtained that helped to identify high pressure regions. Results: Both PP and ESP showed a statistically significant association with CGH (p<0.001). By CFD analysis, both steady and transient phases of simulation showed drop in pressure due to constriction of internal carotid and vertebral artery by ESP and PP respectively and were found to decrease the volume of blood reaching the brain, 0.12 /0.13 mL and 0.06 mL respectively. Conclusions: Our analysis proves ESP and PP as contributing factors towards CGH. Hence for proper diagnosis and management of headache disorders, clinicians should have adequate knowledge about these anatomical structures and their resulting clinical symptoms.

• 대한공간정보학회지
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• 제22권3호
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• pp.21-30
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• 2014

쓰레기 매립지는 기피시설로 입지를 선정하는 초기부터 심각한 갈등을 야기하고 설치과정에 있어서도 많은 어려움을 동반하는 사회적 문제로 인식되는 경우가 대부분이다. 본 연구에서는 매립지의 설치에 있어서 그러한 어려움을 최소화하고 그 과정을 보다 객관화하는 방법으로 매립지 입지선정과정의 체계화 및 표준화를 제시하였으며, 그 내용은 다음과 같다. 첫째, 매립지 입지선정과정을 구체적 사항들로 세분화하기 보다는 보다 보편적인 내용으로 구성하여 크게 4단계로 나누어 각 단계별로 대표적인 필요사항들을 제시함으로써 다양한 경우에도 융통성 있는 적용이 가능하도록 하였고 이를 통한 매립지 입지 선정과정의 표준화를 유도하였다. 둘째, 단계별로 제시된 과정을 진행함에 있어서 GIS(Geographic Information System)와 다 기준의사결정방법 중 하나인 PAPRIKA(Potentially All Pairwise RanKings of all possible Alternatives)를 적용하여 보다 객관적이고 과학적인 방법의 활용을 유도하였다. 셋째, 이러한 내용을 바탕으로 청주 시를 대상으로 가상적 사례 연구를 진행하였으며, 그 결과를 분석하여 최종 결론을 도출함으로써 매립지 입지선정과정의 단계별 적용 실용성과 과정의 객관성을 증명하였다.

• 한국지구과학회지
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• 제38권3호
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• pp.222-238
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• 2017

이 연구의 목적은 지구과학 탐구에서 통합 탐구 기능에 대한 학생들의 학습발달과정을 탐색하는 것이다. 이를 위해 과학 탐구 기능 발달과정 관련 문헌의 조사를 통해 '탐구 설계', '자료 수집', '자료 해석', 그리고 '결론 도출'을 발달 변인으로 설정하고, 각각에 대한 가설적 학습발달과정(HLP)을 4개 수준으로 개발하였다. 또한, 통합 탐구 기능에 대한 학생들의 학습발달과정을 조사하기 위한 도구로 3가지 지구과학 탐구 과제를 개발하였는데, 이들은 학생들이 주어진 문제 인식에서 출발하여 결론 도출에 이르기까지의 통합 탐구 기능을 포함하는 가설-연역적 탐구이다. 중학생, 고등학생, 대학생 총 126명을 대상으로 각각 개발된 지구과학 탐구 과제를 수행하게 한 후 HLP를 토대로 개별 학생들의 통합 탐구 기능을 요소별로 평가하였다. 또한, 학생들의 평가 자료를 Rasch 모델에 적용하여 HLP에 대한 타당화 과정을 거쳤다. 마지막으로, 분석 결과를 근거로 HLP를 수정 보완하여 경험적 학습발달과정을 개발하였다. 이 연구는 학생들의 통합 탐구 기능의 발달에 영향을 주는 요인들을 규명함으로써 지구과학 탐구 수업에서 학생들의 통합 탐구 기능을 효과적으로 향상시키기 위한 스캐폴딩 방안을 찾는데 도움을 줄 수 있을 뿐만 아니라, 지구과학 탐구 수업에 대한 교사들의 PCK를 향상시키는데 필요한 시사점을 제공한다.

• 한국실내디자인학회논문집
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• 제12호
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• pp.87-90
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• 1997

Interior design, evolved from interior decoration of the 20th century, is one of environmental designs which contribute to the overall well-being of human life-physically, psychologi-cally, and emotionally. Moreover, it is also a complex and multi-faceted profession that requires a strong understanding of not only human behaviors and the impact of the designed environment on them, but also of changing technologies and their potential effects. Furthermore, design is a participatory process which requires the application of research, and theoretical knowledge to resolve issues addressing the society. Indeed, there has been various kinds of researches in the interior design field that came about. Through scrutinization of master's theses and doctoral dissertations, this study intends us to grasp the current trend of interior design researches. Theses and dissertations related to interior design and architecture were and sources for this study. The subject of the analysis for this study was limited to the 560 titles of such like these, published from 1970 to 1996 by gradute schools related to interior design or architecture. The results were as follows : Since the '80s, there had been active researches on the interior design field. The subject space had extensively been expanded in its area, especially in the case of commercial environment. The content of those researches had focused on space design with the intention of applying the results to hypothetical one.

• 지역연구
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• 제6권2호
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• pp.107-121
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• 1990

The structural change of occupational composition with the coming of post-industrial society is most evidently observed in the developed country. Specially representative of social changes is the emergence of new occupational sectors, such as the so-called quaternary and quinary sectors, which are based on the use of information technology and managerial skills. The paper raises the question of how and in what this chage of occupational components in a mtro area affects the existing residential structure over the period. In order to extend the discussion of the question, the related hypothetical statements on urban spatial impact due to transformation of the society have xtnsively considered and identified a possible multicenter structure concentration and deconcentration of new jobs and population over the metro area. For further examination, the renowned high tech city of Minneaplis -St. Paul has been selected and the occupational labour forces data for 1960 and 1980 analyzed. As a whole, this area has experienced a dispersal and reconcentration of population in new patterns which have resulted from changes in the occupational structure. In particular, the residential area of white-coller workers(the quaternary / quinary or information workers) has expanded into the city from a suburban core area. In this process, a large proportion of the manual-worker's residential areas in the central city either disappeared or diminished. Consequently, other isolated centers created by the manualworker residents are emerging in both the central city and suburbs. Thus, the development of mulitple centers or cores based on the distribution of occupational characteristics can be considered as a typical ongoing pattern of metro areas in the Unite States.

• Journal of Electrochemical Science and Technology
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• 제11권2호
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• pp.155-164
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• 2020

Here we report our preliminary results about nickel phosphide (Ni-P) electroless coating on the surface of cellulose paper (CP) and its feasibility as the anode for lithium (Li) batteries. In particular, CP can act as a flexible skeleton to maintain the mechanical structure, and the Ni-P film can play the roles of both the anode substrate and the active material in Li batteries. Ni-P films with different P contents were plated uniformly and compactly on the microfiber strands of CP. When they were tested as the anode for Li battery, their theoretical capacity per physical area was comparable to or higher than hypothetical pure graphite and P film electrodes having the same thickness. After the large irreversible capacity loss in the first charge/discharge process, the samples showed relatively reversible charge/discharge characteristics. All samples showed no separation of the plating layer and no detectable micro-cracks after cycling. When the charge cut-off voltage was adjusted, their capacity retention could be improved significantly. The electrochemical result was just about the same before and after mechanical bending with respect to the overall shape of voltage curve and capacity.