• 대한수학교육학회지:수학교육학연구
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• 제17권4호
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• pp.453-475
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• 2007

오늘날 문자의 도입과 함께 시작되는 학교대수는 초등수학에서 중등수학으로의 이행에서 가장 큰 장애요인이 되고 있다. 이는 산술과 차별화된 대수의 본질에 기인하는 것으로, 문자와 식, 방정식에서의 구문론적 측면을 강조하는 것만으로 해결 될 수 없다. 이에 최근 학교대수와 관련된 연구에서는 대수적 사고에 대한 논의가 집중적으로 다루어지고 있다. 본 연구는 대수적 사고 요소를 분석하여 산술에서 대수로의 이행과 초기 대수지도과정을 개선하기 위한 방안을 탐색해본 것이다. 먼저 역사-발생적, 인식론적, 기호-언어학적 관점으로부터 학교대수에서 요구되는 대수적 사고를 분석하고, 이로부터 형식 불역의 원리를 비롯하여 변수 개념과 양적인 추론, 대수적인 해석-식 세우기, 변환추론-식의 변형, 연산감각-식의 조작 등을 핵심적인 대수적 사고 요소로 확인한다. 그리고 초등학교와 중학교 수학 교과서를 분석하고 학생들을 대상으로 한 대수적 사고 능력 검사와 면담을 실시하고, 이를 토대로 학교수학에 포함된 대수적 사고 요소를 살펴본다. 또한 초등학교 수학에서부터 대수적 사고 요소를 강조함으로써 대수 입문기에 해당하는 중학교 이후의 대수 학습에 대한 준비와 더불어 대수적 사고 요소에 초점을 맞춘 산술에서 대수로의 이행을 이끌어내기 위한 지도 방안을 탐색해본다.

• 한국ITS학회 논문지
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• 제15권3호
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• pp.1-11
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• 2016

본 연구는 철도역의 환적저항요인을 평가하고 시사점을 도출하고자 수행하였다. 모형추정을 위한 자료는 RP자료와 SP자료이다. 모형 형태는 본송단계와 환적단계, 셔틀단계를 합친 통합모형과 이를 개별적으로 적용한 분리모형으로 추정하였다. 모형추정 결과 벌크화물 화주는 본송단계에 주안점을 두지만 환적단계 역시 중요하게 인식하는 것으로 나타났다. 특히 환적단계가 셔틀단계보다 더 중요하게 인식되는 점은 주목할 사항이다. 따라서 향후 벌크화물의 철도운송 정책에서 본송단계의 경쟁력을 확보하는 것도 중요하지만 철도역을 중심으로 하는 환적단계에 대한 개선 노력도 요구된다.

• 한국수정란이식학회지
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• 제13권1호
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• pp.53-60
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• 1998

This study was carried out to establish an effective system for embryo transfer techniques by analyzing several factors affecting in-vivo embryo transfer in Korean cattle. Embryos produced in-vivo were transferred into a total of 301 recipients. The results obtained in studies on the factors affecting pregnancy rate after embryo transfer by condition of embryos were as follow ; 1. The pregnancy rate of 301 recipients was 45.2% and higher with fresh embryos than with frozen embryos(63.5% : 21.4%, P<0.01). Embryos superovurated by FSH-P had slightly greater than by SUPER-OV in pragnancy rate, athough these were no difference between two treatments. 2. The pregnancy rates of transferred morulae and blastocysts showed no difference between fresh and frozen embryos(63.5% : 63~6% ; 20.0% : 25.8%). However, the pregnancy rates by quality of flesh and frozen embryos were significantly different(P<0~05). The pregnancy rates were outstandingly high in the grade A, B of fresh embryos(59.0~66.4%), and in the grade A of frozen embryos(43.6%). 3. The number of transferred embryos showed no difference in pregnancy rate, but when frozen embryos transferred, the pregnancy rate was slightly higher with two embryos than that with one embryo.

• 한국수정란이식학회지
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• 제14권3호
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• pp.155-162
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• 1999

This study was carried out to establish an effective system for embryo transfer of techniques by analyzing several factors affecting the gestation length and the weight changes of calves produced from embryo transfer in Korean cattle. The results obtained in study on factors affecting the gestation length and the weight changes of calves produced from embryo transfer were as fallow; 1) The gestation length and the birth weight did not differ between male and female, but the weight changes after birth were remarkablely different between sex(P<0.05). 2) The gestation length between heifers and cows was not different, and body weights at birth and 6 months were remarkabley heavy in cows(P<0.05). Weight changes after 6 months were not different. 3) The gestation length and the birth weight were significantly different between the single and twin calving (P<0.05). Weight of twin at 6 and 12 months were remarkabely light. 4) Calving seasons did not affect the gestation length the and the birth weight. Weaning weight was significantly heavy(P<0.05), but weight changes after weaning were no different among the calving seasons. Conclusivley, this results suggest that cows will be better when considering growth of calves and twin produced from embryo trnsfer in Korean cattle.

• The Journal of Asian Finance, Economics and Business
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• 제9권2호
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• pp.133-140
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• 2022

The impact of State management factors on transfer pricing activities of foreign direct investment enterprises in Vietnam is examined in this study. This adds to the empirical evidence on factors affecting transfer pricing activities of foreign-invested enterprises in Vietnam. A questionnaire survey of officials directly involved in the inspection of transfer pricing activities is used as the research method. The study yielded 226 questionnaires. The author chose 210 questionnaires after deleting those that were ineligible due to a large number of blank cells. The following procedures are used to process the data from the satisfied votes: Cronbach's Alpha test to measure the reliability of the scale; Exploratory factor analysis to break down data into smaller sets of variables to discover the underlying structure; Descriptive analysis to describe the underlying quantitative features of the data; Correlation and regression analysis to evaluate the relationship between variables with the support of SPSS 25 software. Inspection pressure, professional inspector qualifications, and inspector role, State control organization, inspector professionalism, legal corridor on transfer pricing control, macroeconomic situation, and investment environment have a positive impact on state management on transfer price operations, according to research findings. The author has provided solutions to increase the efficiency of State management on transfer pricing operations of foreign-invested businesses in Vietnam based on the research findings.

• 국제학술발표논문집
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• The 1th International Conference on Construction Engineering and Project Management
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• pp.845-848
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• 2005

Technology transfer (TT) has been defined as the shared responsibility between the source and the destination for ensuring that technology is accepted and at least understood by someone with the knowledge and resources to apply and/or use the technology. The adoption of TT in construction industries is necessary for economic growth to occur in developing countries such as Thailand. This process should provide numerous benefits for the host sector in areas such as increased productivity, enhancement of product quality, cost savings, improvements in market share and entry to new markets. However, there are many factors, which may impact on the TT process and its subsequent outcomes for Thai construction firms and individuals, including, the transfer environment, learning environment, transferor characteristics and transferee characteristics. The performance and interaction of these enablers will influence the degree of value added to the local construction sectors in areas such as economic advancement, knowledge advancement and project performance. This paper presents a conceptual framework for international TT that accommodates the numerous factors believed to impact on the processes effectiveness. Through a Pilot Study, where 27 industry professionals from Thailand were interviewed, the significant factors which impact on the TT process have been identified along with the strength of interrelationship between individual and groups of factors. Future research seeks to target a greater sample of respondents with the view to validate the conceptual model and apply it on a number of large Thai projects where international TT was incorporated into the project agreement.

• 한국화재소방학회논문지
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• 제30권3호
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• pp.117-123
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• 2016

본 연구는 재난관리 교육훈련의 전이효과에 대한 충분한 연구가 이루어지지 못하고 있다는 문제 제기 하에 교육훈련의 전이에 영향을 미치는 요인들을 경기도 소방공무원들의 인식을 토대로 실증적으로 규명하고자 한다. 연구목적 달성을 위해 본 연구는 국내 외의 선행연구 검토를 통해 교육훈련의 전이에 영향을 미치는 요인들을 도출하여 이러한 요인들이 실제로 소방공무원들의 교육훈련 전이에 영향을 미치고 있는지를 실증적으로 규명하는데 그 목적이 있다. 연구의 결과, 교육훈련 전이효과에 대한 영향을 미치는 정도에 유의미한 변수는 업무관련성, 학습문화, 동료지원, 자기 효능감, 학습동기, 학습능력, 교육방법 순으로 교육훈련 전이효과에 영향력이 있는 변수로 나타났다.

• 한국포장학회지
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• 제12권1호
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• pp.45-53
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• 2006

Thermal insulation is used in a variety of applications to protect temperature sensitive products from thermal damage. Several factors affect the performance of insulation packages. Among these factors, the thermal resistance of the insulating wall is the most important factor to determine the performance of the insulating package. In many cases, insulating wall consists of multi-layered structure and the heat transfer through this structure is a very complex process. In this study, an one-dimensional mathematical model, which includes all of the heat transfer principles covering conduction, convection and radiation in multi-layered structure, were developed. Based on this model, several heat transfer phenomena occurred in the air space between the layer of the insulating wall were investigated. From the simulation results, it was observed that the heat transfer through the air space between the layer were dominated by conduction and radiation and the low emissivity of the surface of each solid layer of the wall can dramatically increase the thermal resistance of the wall. For practical use, an equation was derived for the calculation of the thermal resistance of a multi-layered wall.

• 동력기계공학회지
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• 제12권3호
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• pp.26-31
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• 2008

This experimental study investigates the local heat transfer enhancement characteristics and the associated frictional head loss in the rectangular channel with a single inclined baffle. Four different types of the baffle are used. The inclined baffles have the width of 19.8 cm, the square diamond of $2.55cm{\times}2.55cm$, and the inclination angle of 5o, and number of holes of up to 9. Reynolds number is varied between 23,000 and 57,000. Results show that the heat transfer and friction factor depend significantly on the number of baffle holes and Reynolds number. The friction factor decreases with increasing Reynolds number and the number of holes on the baffle. It is found that the heat transfer performance of baffle type II(3 hole baffle) has the best values.

• Asian Journal of Innovation and Policy
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• 제6권3호
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• pp.295-312
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• 2017

The purpose of this case study is to understand the sustainability practices of knowledge transfer process at the Malaysian government-industry-academia consortium. At this stage in the research, the R&D consortium is defined as an established entity by two or more organizations that pool resources and shared decision making for cooperative research and development activities. In attempts to understand the formation, outcomes and sustainability of the sustainable knowledge transfer process, this paper conducted a systematic literature review based on Gough, Oliver and Thomas systematic reviews protocol. From the review, the data were enriched and enhanced with a better understanding of sustainable knowledge transfer process. The systematic review resulted in identifying six factors including internal and external perspectives. However, key sustainability factors are not only directly influencing KTP, and the consortium, but are also mediated by other organisational variables.