• The Journal of Asian Finance, Economics and Business
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• 제7권11호
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• pp.549-556
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• 2020

Real estate markets play an essential role in the economic development of both developed and developing countries. Investment decisions in private real estate demand the consideration of several qualitative and quantitative criteria. Especially in Vietnam, demand for housing, apartments are rising which has resulted because of the migration from rural to urban areas. This study aims to determine the influencing factors of the real estate purchasing behavior and then recommend a grey Multi-Criteria Decision Making (MCDM) support model to evaluate real estate alternatives based on a numerical example in Vietnam. A set of essential criteria are identified based on experts' opinion, and the proposed determinants are initial investment, maintenance cost, prestige location, distance to interesting places, parking lot, public transportation, property condition, total area size, number of rooms, and neighbors. The subjective weights were obtained by using the Decision-Making Trial and Evaluation Laboratory (DEMATEL) model, and the Grey Relational Analysis (GRA) technique is employed to prioritize and rank real estate alternatives. The results reveal that this approach can be useful to make purchasing decisions for many kinds of real estate property under uncertain business environments. These findings indicate that the presented hybrid model has advantages in granting flexibility to the preferences of decision makers.

• 정보관리연구
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• 제43권2호
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• pp.1-22
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• 2012

본 연구의 목적은 과학기술 분야 정보자원의 선택적인 디지털 아카이빙을 위한 이론적 기초를 제공 하는데 있다. 연구의 목적을 달성하기 위해서 콘텐츠 유형별 아카이빙 우선순위 결정을 위한 평가기준과 중요도를 설문조사 등 정량적인 연구방법을 사용하여 조사 하였고 평가기준의 인지과정을 보다 심층적으로 조사하기 위해서 포커스그룹 연구 등 정성적인 연구방법을 동시에 사용 하였다. 또한, 평가기준 및 중요도 등 연구결과의 분석을 바탕으로 아카이빙 대상 콘텐츠 우선순위 결정을 위한 평가 모형을 제시하였다.

• Quantitative Bio-Science
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• 제37권2호
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• pp.133-141
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• 2018

Graphical lasso is one of the most popular methods to estimate a sparse precision matrix, which is an inverse of a covariance matrix. The objective function of graphical lasso imposes an ${\ell}_1$-penalty on the (vectorized) precision matrix, where a tuning parameter controls the strength of the penalization. The selection of the tuning parameter is practically and theoretically important since the performance of the estimation depends on an appropriate choice of tuning parameter. While information criteria (e.g. AIC, BIC, or extended BIC) have been widely used, they require an asymptotically unbiased estimator to select optimal tuning parameter. Thus, the biasedness of the ${\ell}_1$-regularized estimate in the graphical lasso may lead to a suboptimal tuning. In this paper, we propose a two-staged bias-correction procedure for the graphical lasso, where the first stage runs the usual graphical lasso and the second stage reruns the procedure with an additional constraint that zero estimates at the first stage remain zero. Our simulation and real data example show that the proposed bias correction improved on both edge recovery and estimation error compared to the single-staged graphical lasso.

• 대한한의학회지
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• 제40권3호
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• pp.21-34
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• 2019

Objectives: The purpose of this article is to develop steering of program accreditation system in Korean Medicine Education through meta-evaluation. For this study, the subjects of our research were categorized as the accreditation criteria and system, results and effects, tasks for improvement on Korean Medicine Education. Methods: We conducted Focus Group Interview on 102 full-time professors with experience of participating on accreditation of Korean Medicine Education from 12 college of Korean Medicine Education and we analyzed it by thematic analysis. Results: The accreditation criteria and program evaluation system of Korean Medicine were listed as 'Confusion about the goals of program evaluation', 'High hurdles on accreditation', 'obsession to success cases', 'Small college complaints about applying the same criteria', 'Dilemma of quantitative and qualitative evaluation'. The results and effects of program evaluation in Korean Medicine Education were listed as 'Establishment of base infrastructure for basic medical education', 'Benchmarking and exchanging opinions through evaluation certification', 'Resistance to documents and document-based evaluation', and 'Double-sided of evaluation certification'. As for the tasks for further improvement, the following list is suggested. 'Actively promote evaluation certification', 'Simplification and standardization of forms', 'Requesting for activating about Evaluation committee', 'Need for consulting before regular evaluation'. Conclusion: It is necessary to upgrade the accreditation system and make efforts to improve the issues discovered for better Korean Medicine Education.

• 한국습지학회지
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• 제13권2호
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• pp.291-306
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• 2011

본 연구의 목적은 수자원사업과 관련된 대표적 환경지표를 제시하고 더불어 사업전후 정량, 정성적 예측을 통합, 반영하는 일련의 방법을 제시하는 것이다. 구체적으로 수질, 경관, 생태계의 3가지 환경성 평가기준과 각각의 평가지표를 제시하였고, MAUT 기법을 이용하여 3가지 평가기준에 대한 효용함수를 전문가 설문을 통해 각각 도출하였다. 사업에 따른 영향정도는 정량적으로 예측된 결과를 사용하거나 이것이 어려울 경우 각 기준별 영향정도를 설문을 통하여 정성적으로 예측하는 방안을 제시하였다. 한편, 평가기준별 가중치는 해당 사업의 특수성을 고려하고자 사업별로 결정하는 것이 바람직하다고 제시하였으며, 이러한 일련의 과정은 사례연구로부터 적용성을 검토하였다. 본 연구의 결과물은 향후 사업에 따른 환경변화에 민감한 수자원사업에서 의사결정 지원수단으로 사용가능할 것으로 기대된다.

• 한국물환경학회지
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• 제31권5호
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• pp.543-555
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• 2015

The existing standard for soil erosion risk assessment has limitations in sustainable topsoil management since the fixed criteria are applied to determination of soil erosion risk areas regardless of land use types. It may not be necessary to apply soil erosion best management practices to agricultural areas with high potential of soil erosion because human or economic damage derived from soil erosion might be tiny in that region. Furthermore, the fixed criterion with absolute values can select too many hot spots of soil erosion to conduct efficient soil erosion management. Thus, objective of this study was to suggest the relative criteria using statistical analysis for efficient soil erosion management. In future, the relative indices for soil erosion prevention should be improved to provide a priority of soil erosion management considering economic damage from soil erosion or functional values of soil with quantitative soil erosion. Additional researches will be needed to reflect a regional characteristics and to consider various land use types and different criteria.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2011년도 춘계 학술논문 발표대회 2부
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• pp.137-138
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• 2011

This paper aims to analyze the performance of Construction Supervision System that contributed to domestic construction projects in public area with respect to reduction of shoddy constructions and improvement of the quality of construction results. Thus research suggested qualitative and quantitative criteria for assessing outcomes and analyzed the performance of Construction Supervision System based on the result of survey questionnaires.

• 전기의세계
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• 제20권5호
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• pp.9-14
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• 1971

This paper aims to study structural changes in electric conductors which are heated during electric fire by means of microscope. The results are applicable to the pursuit of the causes of electric fire and to the establishment of criteria for the indentification of electric fire. This work is an extension of the previous study by the author, particularly with emphasis on quantitative analysis.

• 한국신뢰성학회지:신뢰성응용연구
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• 제9권3호
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• pp.165-176
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• 2009

The risk management case is an organization's formal arrangement to ensure the safety of its work activity within risk management system. It allows an organization to demonstrate its capability in achieving its safety objectives and in meeting regulatory requirements. This paper presents how the safety assessments are described, prepared and maintained to meet the criteria specified by the upcoming safety regulations. We propose the elements of risk management system that include arrangements for the ongoing identification of hazards, assessment of risks and the implementation of necessary control measures.

• 비파괴검사학회지
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• 제34권2호
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• pp.176-183
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• 2014

음향방출법은 차량 내부에 장착된 실린더의 경우 분해없이 동작중에 실시간으로 측정이 가능하므로 다른 비파괴평가 방법보다 많은 장점을 가지고 있다. 이러한 장점을 가지고 음향방출법은 미국 교통부(DOT)로부터 수압시험의 대체로 압력용기의 안정성 평가 방법으로 승인되었다. 본 논문은 압력용기 제조사로부터 UT 결함용기 및 결함이 있는 이음매 없는 압력용기인 Type 1과 Type 2에 대한 정량적인 평가기준에 대한 연구를 수행하였다. Type 1의 경우, ASTM E 1419-02를 기준으로 113L 규격의 준비된 용기로 피로반복시험을 통해 크랙의 성장부터 누설까지 경향을 파악하였다. Type 2의 경우, ASTM E 2191-02를 기준으로 119L 건전한 용기와 수압가압으로 불량용기를 용기에 slow-fill 방법으로 검증하였다. 본 연구에서 음향방출법을 이용한 Type 1과 Type 2의 시험은 불량용기와 건전한 용기를 효과적으로 구분할 수 있었다.