• 한국수학사학회지
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• 제19권4호
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• pp.31-62
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• 2006

본 논문에서는 먼저 수학사를 수업에 활용하고자 하는 이론적 근거를 여러 가지 교육적 측면에서 고찰한다. 아울러 수학적 인식에 관한 개인적인 발달과 역사적 발달 사이의 관계를 토대로 수학사 활용의 교육적 유용성을 가장 강력하게 이론적으로 뒷받침하는 역사 발생 원리의 생성, 전개 과정 및 그 의의와 한계 등을 논한다. 또한 여러 가지 측면에서 이론적 근거가 마련되고 있는 수학사 활용에 대한 긍정적인 입장에서 구체적인 방안을 기준과 함께 제시하였다. 다음으로 지금까지 논의된 수학 영재 프로그램 개발의 방향과 실제를 개관하고 수학사를 접목하는 것에 대한 근거를 밝혔다. 마지막으로 수학사 활용의 예를 미분개념의 이해를 중심으로 제시하였다.

• 산업경영시스템학회지
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• 제42권1호
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• pp.137-142
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• 2019

There are two methods for evaluating two or more mutually exclusive projects. One is a total investment approach and the other is an incremental investment approach. The former can rank projects by the criterion of the net present value, but the latter can't do it. An incremental investment approach is only possible when all pairwise alternatives are compared. Thus an incremental investment approach is superior in ranking them over an incremental investment approach. To do so, a principle of comparison must be established. Comparisons of profitability are reasonable when operating the same amount of investment over the same period of time. One principle is that all projects are invested in the largest of the projects. Another principle is that all projects are invested during the longest project life of the projects. In this paper, even if the principle is followed, it will be shown that the external rate of return fails to rank them. However, the productive rate of return criterion would prove to be able to rank them like the net present value standard, provided that the principle of comparison is kept. In addition, rate of returns can be assessed so that all mutually exclusive projects can be compared at once, such as on the criterion of the net present value. That is, it can be also compared with many other returns, such as the profit rates on financial investments or real investments.

• 한국지능시스템학회:학술대회논문집
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• 한국퍼지및지능시스템학회 2002년도 추계학술대회 및 정기총회
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• pp.29-32
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• 2002

We consider the question whether, for given fuzzy numbers, there are different Pairs of f-norm such that the resulting membership function within the extension principle under addition are identical. Some examples are given.

• 한국사회복지학
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• 제59권3호
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• pp.59-73
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• 2007

본 연구는 산재보험의 재해보상이 산재 여부에 따라 급여 수급을 전액받거나 혹은 전액 받지 못하는 체계로 인해 산재여부에 대한 판정의 복잡성과 갈등의 요소가 내재되어 있는 문제점의 개선에 초점을 두고 있다. 재해보상형태는 초기 원인주의에 입각한 사용자의 배상책임에 따라 배상 정도가 결정되었으나, 이후 무과실책임주의로의 전환과 재해인정범위의 확대 과정을 거치게 되었다. 이러한 발전은 재해인정에 있어서 All or Nothing 원칙 강화로 이어지게 된다. All or Nothing 원칙이 상당한 논란의 소지가 있음에도 부분인정제도를 도입하기 어려운 이유는 행정적 복잡성을 더욱 심화시키는 점에 있다. 따라서 선진국에서는 사회보장의 종합적 차원에서 보편적 보장을 통해 전체인정제도의 한계를 극복하고 있다. 하지만 한국의 경우 재해로 인한 비용발생이나 소득손실에 대해 종합적 보장체제가 이뤄져 있지 않아 산재인정과 관련된 논란이 심해질 우려가 있다. 따라서 보상차등화의 취지와 논리 수용을 통한 제도개선과 더불어 장기적으로는 종합적인 재해보상 체제 구축이 요구된다.

• 정보보호학회논문지
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• 제32권2호
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• pp.329-339
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• 2022

최근 개인정보가 데이터로 활용되면서 다양한 신산업 등이 발굴되고 있지만 체계적인 관리체계 구축 미흡등 으로 개인정보 유출 및 오남용 사례가 연이어 발생되고 있다. 또한 지난 '20년 8월, 데이터 3법 시행 이후 개인정보를 가명·익명 처리하여 활용하는 서비스가 등장하고 있지만 불충분한 가명처리 및 가명정보 처리에 대한 안전성확보조치, 혐오표현 등의 민감정보의 처리 미흡으로 개인정보 이슈가 발생하고 있다. 이에 본 연구는 개인정보를 안전하게 활용하기 위하여 캐나다의 Ann Cavoukian[1]이 제시한 개인정보보호 중심 설계(Privacy by Design, 이하PbD) 원칙을 기반으로 가명정보 생명주기에 적용할 수 있는 새로운 PbD원칙을 제안하였다. 또한, 제안한 방법에 대하여 개인정보보호 관련 전문가 30명을 대상으로 설문조사를 통하여 제안 방법의 유의미함을 확인할 수 있었다.

• 마이크로전자및패키징학회지
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• 제24권4호
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• pp.1-7
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• 2017

Aluminum alloys have been widely used in many fields such as electronic, structure, aero-space and vehicle industries due to their outstanding thermal and electrical conductivity as well as low cost. However, they have some difficulties for using in brazing process because of the strong oxide layer of $Al_2O_3$ on the surface of Al alloy. In addition, their melting point is similar to that of brazing filler metal resulting in thermal damage of Al alloys. Therefore, it is very important to understand the brazing principles, filler metal and its properties such as wetting, capillary flow and dissolution of base metal in the Al brazing process. This paper reviews the brazing principles, aluminum alloys, and brazing fillers. In the case of brazing principle, some formula was used for calculation of capillary force and the dissolution to obtain the best condition of Al brazing. In addition, the advanced research trends in Al brazing were introduced including thermal treatment, additive for improving property and decreasing melting point in Al brazing process.

• 한국소음진동공학회논문집
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• 제26권2호
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• pp.217-224
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• 2016

In this study, a transfer matrix method (TMM) for a twisted uniform beam considering the effect of rotary inertia is developed, and the differential equation and the displacements and forces are derived from Hamilton's principle. The particular transfer matrix is derived by applying the distributed mass and transcendental function while using a local coordinate system. In addition, the results obtained from this method are independent for a number of subdivided elements, and this method can determine the exact solutions for the free vibration characteristics of a twisted uniform Rayleigh beam. To validate the accuracy of the proposed TMM, the computed results are compared with those reported in the existing literature, and the comparison results indicate notably good agreement. In addition, the method is used to investigate the effects of rotary inertia for a twisted beam.

• Korean Journal of Acupuncture
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• 제37권4호
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• pp.276-283
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• 2020

Objectives : In each section of Huangdineijing, we reviewed how the actual clinical application of Five-Transport-points was reflected and looked at the pattern of the application at the time. Methods : The contents related to Five-Transport-points in Huangdineijing were collected from each part, and analyzed. Results : There was a great difference in the number and contents of the clinical application of each Five-Transport-point for each 12 meridian, and only 28.3% of all Five-Transport-points had been related to clinical treatment. In addition, in specific applications, spring point, stream point, and sea point were used more often than well point, and Five-Transport-points between the same meridian or different meridians were used in combination as needed. Conclusions : Five-Transport-points described in Huangdineijing are intended to be operated within the overall framework structurally or functionally with a certain principle, but as a result of comprehensive analysis of specific examples of clinical application, there was a difference in the application between Five-Transport-points. This indicates that at the time of the establishment of Huangdineijing, which was the early stage of the development of Traditional East Asian Medicine, a variety of miscellaneous acupuncture methodologies were used in addition to those based on five elements principle.

• 한국식생활문화학회지
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• 제7권2호
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• pp.157-171
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• 1992

This study attempted to investigate the effect of housemaker's interest in dietary life on the knowledge of cooking principles and cooking methods, and on the daily meal management. Housemakers whose age ranged from 20 to 50 were surveyed in their residence. The results of this study were as follows. First, the level of interest in dietary life was positively related with ages, education and income levels. Moreover, housemaker who did not work or did not take care of relatives had higher level of interest in dietary life than those who did. Second, most housemakers bought foods and prepared a meal by themselves. The average time spent in preparing meals was 2 to 3 hours, and the number of side dishes cooked per day expect for the main dish was 5.46 percent of the total respondents ate out more than once a month for a 'family tie'. Third, there was no relation between the knowledge of cooking principle and the variables such as ages, education and income levels. Fourth, the level of the knowledge of cooking method about Korean traditional dishes was positively related with ages, education and income levels. In addition, housemakers who did not work or did not take care of relatives had less knowledge of Korean traditional dishes than those who did. Finally, the interest in dietary life was significantly correlated with the knowledge of cooking principle and cooking method of Korean traditional dishes.

• 한국실내디자인학회논문집
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• 제19권5호
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• pp.83-94
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• 2010

Conventionally, ornament has developed around linear thinking based on Euclidean geometry, and been explained as simple and lucid natural Euclidean geometrical phenomena. The modular arrangement with vertical, horizontal and diagonal grids has been an organizing principle of classical ornament, but in digital era ornament is found not to be explained only with the principle of traditional arrangement due to the seemingly irregular complex forms. In that sense, this study presents the concept of digital ornament and examined the backgrounds of ornament in digital age, that are complex system and non-Euclidean geometry. Accordingly, the present study takes an approach by dividing new formal types of ornament into algorithmic form, hybrid form and dynamic form to find out a principle of pattern organization. Lately, architects who actively use computer for their architectural designs take the algorithmic strategies in nature and create various and complex patterns by simple rules. The patterns are not the repetition of the same, but the production of singularities. In addition, hybrid form by morphing shows a topologically flexible evolutionary transformation, and is used to create in-between transitional shapes from the source to target. Finally, the patterns by the interaction between the system components which are corresponded to the embedded forces emerge from dynamic simulation of the natural environment. Rather than objects itself, focus is given to the process of generating forms, and the ornamental patterns as the revelation of such implicit order provide not just the formal beauty but also spatial pathways for lights and air, maximizing the effects of lights.