• 한국수학교육학회지시리즈C:초등수학교육
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• 제20권3호
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• pp.193-204
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• 2017

본 연구는 문제 만들기 활동과 수학 수업을 통합할 수 있는 실제적 방안을 모색하고자 수행되었다. 이를 위해 일상적으로 이루어지는 수학 수업의 정리 단계에서 문제 만들기 활동을 실행하고, 학생들이 만든 문제를 체계적인 절차와 준거를 사용해 분석하였다. 먼저 학생들이 만든 540문제 중 수학적으로 해결 가능한 문제는 81%, 오류가 있는 문제는 18%로 나타났다. 이어서 수학적으로 해결 가능한 문제를 복잡성 수준에 따라 분석하였는데, 상-수준 13%, 중-수준 30%, 하-수준 57%였다. 마지막으로 오류 유형으로 분류된 비-수학적 문제, 단순한 진술, 해결 불가능 문제는 학생들의 성취 수준과 학습 내용에 따라 다양하게 분포되어 있었다. 본 연구는 학생들이 생성한 문제를 분석하기 위한 체계적인 절차와 준거를 제시하고 수학 수업과 문제 만들기 활동을 통합할 수 있는 방향을 제시했다는 점에서 의의를 찾을 수 있다.

• 한국초등수학교육학회지
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• 제19권3호
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• pp.251-266
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• 2015

'수학 수업을 더 들을수록 더 나은 수학 교사가 될 것이다.'라는 주장은 정당하게 들린다. 하지만 대학 수준의 수학, 예를 들어, 추상 대수나 해석학 같은 수학을 듣는 것이 어느 정도 초등 수학을 잘 가르치는데 영향을 미칠까 하는 데에는 의문이 생긴다는 주장이 일고 있다. 수학자가 초등 수학을 가르치도록 교육 받은 사람보다 나은 초등교사일 수 있는가? 이 논문은 대학 수준의 수학을 배우는 것과 학교 수준의 수학을 배우는 것이 예비 초등 교사들의 수학 교수를 위한 내용지식에 미치는 영향에 대하여 연구하였다. 이 연구에는 Teacher Education and Development Study in Mathematics에서 제공하는 데이터베이스를 다중회귀 분석방법을 사용하여 분석하였다. 초등 전 과목을 다 가르치도록 교육받은 예비 초등 교사들이 연구의 대상이며 교사교육을 이미 다 받은 시점에서 데이터가 수집되었다. 데이터 분석 결과는 예비 초등 교사들이 그들이 앞으로 가르치게 될 초등 수학을 다시 한 번 접해 볼 기회를 갖는 것이 수학 교수를 위한 내용 지식에 도움이 될 것이라는 것을 보여준다.

• 대한치과보철학회지
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• 제38권3호
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• pp.336-347
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• 2000

Statement of problem. Luster loss in esthetic anterior ceromer restoration can occur and can be related with rough surface texture. Understanding durability of surface finishing methods like polishing and surface coating have critical importance. Purpose. This study evaluated the effect of tooth brushing and thermal cycling on surface luster of 3 ceromer systems (Artglass, Targis, Sculpture) treated with different surface finishing methods. Material and methods. Seventy-two samples were prepared: 12 for control group Z100, 12 for Artglass, 24 for Targis, and 24 for Sculpture. Half of the Targis and Sculpture were polished according to the manufacturer's recommendation. The rest of the samples were coated with staining and glazing solution for Targis and Sculpture, respectively. All specimens were subjected to 10,000 cycles between $5^{\circ}C\;and\;55^{\circ}C$ with 30 seconds dwell time. Tooth brushing abrasion tests were performed in a customized tooth brushing machine with 500g back and forth for 20,000 cycle. Luster comparisons were based on grading after direct observation, and light reflection area was measured with Image analysis software. Results. All materials showed an decrease in luster grade after thermal cycling and tooth brushing. The post-tooth brushing results revealed that the glazed Sculpture had greater mean luster grade than did any other groups. While, the stained Targis group showed greatest changes after tooth brushing (p < 0.05), polished Targis and Sculpture did not show significant changes. However, glazed Sculpture showed discretely fallen out glaze resin. Conclusion. From the results of this study, all of the ceromer specimens were much glossy than control composite group after tooth brushing. coatings used for Targis and Sculpture had not durability for long term use.

• 대한치과보철학회지
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• 제40권3호
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• pp.275-286
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• 2002

Statement of problem. Surface alteration of the implant screws after function may be associated with mechanical failure. Theses metal fatigue appears to be the most common cause of structural failure. Purpose. The purpose of this study was to evaluate surface alteration of the implant screws after function through the examination of used and unused implant screws in SEM(scanning electron microscope). Materials and methods. In this study, abutment screws(Steri-oss, 3i), gold retaining screw(3i) and titanium retaining screw(3i) were retrieved from patients. New, unused abutment and retaining screws were prepared for control group. Each of the old, used screws was retrieved with a screwdriver. And retrieved implant complex of Steri-oss system was prepared for this study. Then, SEM investigation and EDS analysis of abutment and retaining screws were performed. And SEM investigation of cross-sectioned sample of retrieved implant complex was performed. Results. In the case of new, unused implant screws, as maunfactured circumferential grooves are regularly examined and screw thread are sharply remained. Before ultrasonic cleansing of old, used implant screw, a lot of accumulation and corrosion products were existed. After ultrasonic cleansing of old, used implant screws, circumferential grooves as examined before function were randomly deepened and scratches increased. Also, dull screw thread was examined. More surface alterations after function were examined in titanium screw than gold screw. And more surface alteration was examined when retrieved with driver than retrieved without driver. Conclusions. These surface alteration after function may result in the screw instability. Regularly cleansing and exchange of screws was recommended. We recommend the use of gold screw rather than titanium screw, and careful manipulation of the driver.

• Asian review of World Histories
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• 제4권1호
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• pp.3-34
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• 2016

This introduction is both a statement of a research problem and an account of the first research results for its solution. As more historical databases come online and overlap in coverage, we need to discuss the two main issues that prevent 'big' results from emerging so far. Firstly, historical data are seen by computer science people as unstructured, that is, historical records cannot be easily decomposed into unambiguous fields, like in population (birth and death records) and taxation data. Secondly, machine-learning tools developed for structured data cannot be applied as they are for historical research. We propose a complex network, narrative-driven approach to mining historical databases. In such a time-integrated network obtained by overlaying records from historical databases, the nodes are actors, while thelinks are actions. In the case study that we present (the world as seen from Venice, 1205-1533), the actors are governments, while the actions are limited to war, trade, and treaty to keep the case study tractable. We then identify key periods, key events, and hence key actors, key locations through a time-resolved examination of the actions. This tool allows historians to deal with historical data issues (e.g., source provenance identification, event validation, trade-conflict-diplomacy relationships, etc.). On a higher level, this automatic extraction of key narratives from a historical database allows historians to formulate hypotheses on the courses of history, and also allow them to test these hypotheses in other actions or in additional data sets. Our vision is that this narrative-driven analysis of historical data can lead to the development of multiple scale agent-based models, which can be simulated on a computer to generate ensembles of counterfactual histories that would deepen our understanding of how our actual history developed the way it did. The generation of such narratives, automatically and in a scalable way, will revolutionize the practice of history as a discipline, because historical knowledge, that is the treasure of human experiences (i.e. the heritage of the world), will become what might be inherited by machine learning algorithms and used in smart cities to highlight and explain present ties and illustrate potential future scenarios and visionarios.

• KDI Journal of Economic Policy
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• 제35권3호
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• pp.65-89
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• 2013

본 연구는 파리선언(2005)의 개발효과를 평가하는 것을 목적으로 한다. 구체적으로 말하면, OECD/DAC가 78개의 개도국으로부터 수집한 2005~10년 기간의 자료를 이용하여, 파리선언의 여러 원칙이 독자적으로 또는 원조와의 상호작용을 통하여 1인당 국민소득의 성장에 기여한 정도를 평가한다. 본 연구의 결과에 의하면, 원조가 독자적으로 국민소득의 증가에 기여한 효과는 부정적이다. 그러나 건전한 정책과 제도가 있는 개도국 또는 파리선언의 몇 가지 원칙이 실시된 국가에서는 원조의 효과가 긍정적이었다. 파리선언의 다섯 가지 원칙 중에서 오직 원조가 개도국의 개발전략과 계획에 연계되어야 한다는 원칙이 적용된 경우와 원조공여국-수원국 상호 간에 상호책임의 원칙이 적용된 경우에는 원조가 경제성장에 긍정적이며 유효한 영향을 미쳤다는 것을 보여 준다. 따라서 파리선언의 원칙들이 원조의 효과성을 제고한다는 OECD의 주장은 오직 부분적으로만 실증된 셈이다. 원조와 파리선언의 개발효과에 관한 이러한 실증적 분석 결과는 건전한 제도나 정책이 경제성장에 중요하다는 경제학 문헌의 주장과 앞으로의 국제개발협력의 논의과제에 주는 의미가 크다.

• 지역사회간호학회지
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• 제7권2호
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• pp.361-383
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• 1996

This study analyze and find problems in the 4-year and 3-year college nursing curriculum through comparison and analysis of each college curriculum according to the Nursing Education Standards Criteria from the Korean Nurse Association, 1994. Analyzed areas and results are as follows : 1. Nursing education philosophy To analyze Nursing Education philosophy, we reviewed the categaries of Person, Health, Nursing, Environment. In of 4-year colleges, 50% of them were presenting definitions of Person that were the same as the Nursing Education Standards. But in the definitions of Environment and Health, they presented limited contents. In the 3-year college, we could not find any statement of Nursing Education Philosophy similar to Nursing Education Standards. 2. Nursing education purpose In 4-year colleges, they stated aboict only 3 aspects and others werelacking in correspondance with Nursing Education Standards. In 3-year colleges, some aspects were sincere, but when they were compared to the standards they were very limited. 3. Nursing education curriculum As we analyzed 4-year and 3-year college nursing curriculum, We found that 3-year colleges use curriculum from 4-year colleges in a modified and condensed form. Thus, it is considered that 3-year colleges have considerable burdens because they have to teach all the credits within 3-years that is normally taught in the 4-year college. Therefore, we can suppose that 3-year colleges have more problems in the quality. And, the majority of 4-year and 3-year college curriculums don't include recent concepts such as health promotion, prevention, and rehabilitation.

• 한국안전학회지
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• 제33권2호
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• pp.68-75
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• 2018

The safety management cost system under the Construction Technology Promotion Act has contributed greatly to the prevention of construction accidents according to the chronological changes and social demand, but various problems have been pointed out. The biggest problem is that the safety management cost is earmarked very low because other items of safety management costs except for the safety inspection are not appropriately included in the actual construction site. Furthermore, it has been pointed out that it is difficult to settle the orderer due to the lack of specific use criteria. Therefore, in order to secure the proper safety management cost, this study is to estimate the actual cost by using of specification, quantity, material cost, labor cost for each type of the safety management item The results of this study were compared with the 71 cases of safety management costs in the safety management plan. In addition, analysis of unclear or unnecessary items in the current safety management cost and criteria and suggestions for improvement are provided. It is hoped that the results of this study will contribute to the rational safety management rate calculation.

• 한국치위생학회지
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• 제12권5호
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• pp.1049-1058
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• 2012

Objectives : It will be necessary to make statement about the competence targeted in the dental hygienic education that adopts the competence-based curriculum from the standpoint of core competence which the students need to be equipped with in the society. Methods : To achieve the education objective of Dental Hygienics, the information available on the website of the Korean Dental Association, universities and graduate schools were used, and the education objectives of the concerned universities which were posted in the websites of 82 universities from July to August, 2011 were analyzed. Results : C7 and C1 accounted for 21.1%, the highest percentage, in the core capability, while HP1 comprised 79.6% in the health improvement and disease prevention. CM1 stood at 73.7%, the highest percentage, in the community involvement(CM) area, and PC4 accounted for 90.8%, the highest percentage, in the patient care(PC) area. In the professional growth and development(PGD) area, PGD1 was the highest, followed by PGD3. In relation to the comments on the occupational types after graduation, 63.1% of respondents mentioned the dental hygienists at the school, while 33.3% did not make any comment on the dental hygienists. Conclusions It was necessary to re-establish the essential objectives of the graduates based on the competence as the accomplishments of studying and learning in the department of dental hygiene. It may be a useful method to set the competency-based education objective on the basis of the implementation ability and the level of graduates.

• 환경영향평가
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• 제16권2호
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• pp.129-141
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• 2007

With its more than 35 years of experience with EIA of NEPA in United States, the extensive knowledge base of EIA could be the most suitable place for initial field of HIA to explore lessons available for. However, caution is needed as the technical differences in analysis, different policy context, and distinct professional culture between EIA and HIA might be. The successe of EIA of NEPA is the integration of environmental goals into decision making process, improved planning, and increased transparency and public involvement, whereas shortcomings of it were defined as the excessive volume and complexity of EIA documents, the limited and adversarial public involvement, the procedural process (not substantive), focus on projects (not on policies and programs), and the limited consideration of health impacts. Integrating HIA into existing EIA process is positive in two reasons that the human health is closely related with natural environment and EIA process is a fully established process that effectively cuts across bureaucratic and sectoral boundaries. Also, integrating of HIA into EIA might be a way with least resistance for the widespread use. A freestanding HIA separated from EIA is desirable in terms of excessive volume of EIA documents and the procedural and legal focus of EIA. It is needed to develop the formulated methodologies for advancing HIA whether it is a part of or separated from EIA, and to estimate the potential values of HIA in the substantial society context. When possible, HIA should be established on the ways that EIAs have been used successfully.