• 국제학술발표논문집
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• The 6th International Conference on Construction Engineering and Project Management
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• pp.704-705
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• 2015

Recent research has been ongoing for modular buildings in the country, and interest increases. However, in accordance with legal restrictions in the country with regard to Project Delivery system of Modular Building, the activation of modular buildings industry is obstructed. In Korea, in accordance with national contract law, the construction contract is apply to the project delivery system of modular buildings, and in accordance with Framework Act on the Construction Industry, The project delivery system of modular buildings has to be a separate order. The definition of separate order in contract as defined in the law is that the electric work and Communication work and digestion facility work has to be separate each contract in order to be ensured professionalism. In accordance with law, the project delivery system of modular buildings is that the contract for construction is concluded with the Owner and the Construction Contractor and the contract for goods is concluded with the construction Contractor and modular manufacturer. Due to these project delivery system, the domestic factory production rate when making a modular unit is significantly reduced compared to the rate of factory production abroad and the domestic factory production rate is estimated to 10-20%. Due to the factory production rate is also low, despite what can be done at the factory the workload in construction field increases. According to the workload in field increases, the effect of the schedule reduction can be reduced. It resolved to form a consortium with a modular manufacturer and construction companies or the contract is concluded with Owner, modular manufacturer and construction companies in each. In this paper, we propose a specific project delivery system for modular building to solve the problem of the low factory production rate and the problem of schedule reduction. Through this paper, due to the variety of project delivery system on modular buildings is expected to contribute to the activation of modular buildings.

• 정보처리학회논문지D
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• 제9D권2호
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• pp.259-266
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• 2002

소프트웨어 개발시 중요하게 제기되는 문제점으로 소프트웨어 생명주기의 초기단계에서 개발에 투입될 노력과 비용을 추정하는 능력이다. 측정된 소프트웨어 규모인 기능점수 (FP, Function Point)로부터 프로젝트 개발에 소요되는 노력과 비용을 추정하는 회귀모델들이 제안되었다. 그러나 이들 제안된 모델들은 사용한 표본의 크기가 작고, 과거에 개발된 프로젝트를 대상으로 하고 있다. 1990년대에 개발된 789개 소프트웨어 개발 프로젝트들에 투입된 개발노력에 이들 모델을 적용한 결과 결정계수 $R^2$가 0.53 이하로 데이터의 변동을 설명하였다. 본 논문은 프로젝트 인도율(PDR)을 이용하여 동질성을 갖는 그룹으로 분류하여 개발노력을 추정하는 모델을 제안하였다. 제안된 모델은 랜덤한 잔차 분포를 갖고 있고, 대부분의 PDR 범위에서 0.99이상의 결정계수로 데이터의 변동을 설명하였다.

• Journal of Construction Engineering and Project Management
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• 제2권4호
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• pp.25-31
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• 2012

The growing rate of delays is adversely affecting the timely delivery of construction projects. This study therefore assesses construction stakeholders' perception of the causes of delays and its effects on project delivery in a bid to proffer solution in minimizing the occurrences of delays. Questionnaire was used to elicit responses from construction stakeholders; a total of thirty three causes of delays, seventeen resultant effects of delays and fifteen methods of minimizing construction delays were identified for the study based on literature reviews. The results suggest that client's cash flow related problems are the main causes of delays while time and cost overruns are the major identifiable effects of delays in construction projects. However, adequate project planning and budgeting were suggested as possible ways of minimizing the occurrences of delays.

• 정보처리학회논문지D
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• 제10D권1호
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• pp.77-84
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• 2003

팀의 규모에 관한 연구 결과 전문가들은 일반적으로 업무를 수행하는데 규모가 작은 팀이 큰 팀 보다 좋다는데 동의하고 있다. 또한, 항상 최소한의 실질적인 팀 규모를 구성하는데 목표로 하고 있다. 그러나 "작은"이 얼마를 의미하는지가 문제가 된다. 본 논문에서는 프로젝트 인도율과 인도속도와 같은 생산성 측도를 도입하여 이상적인 팀 규모를 결정하였다 300개 프로젝트를 대상으로 데이터 집합을 2개의 서브 그룹인 개발 프로젝트와 유지보수 프로젝트로 분류하였다. 실험결과 가장 성공적인 프로젝트는 최대 5명으로 수행하는 경우였으나, 본 논문은 실제 개발 된 프로젝트들을 대상으로 생산성-기반 이론을 접목시켜 이상적인 팀 규모를 판단하는 지침을 제공한다. 지침을 제공한다.

• Journal of Construction Engineering and Project Management
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• 제4권4호
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• pp.41-46
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• 2014

Indian Construction industry is large, volatile, and requires tremendous capital outlays. Typically, the work offers low rates of return in relation to the amount of risk involved. A unique element of risk in the industry is the manner in which disputes and claims are woven through the fibre of the construction process. Delay is generally acknowledged as the most common, costly, complex and risky problem encountered in construction projects. Because of the overriding importance of time for both the Owner and the Contractor, it is the source of frequent disputes and claims leading to lawsuits. The growing rate of delays is adversely affecting the timely delivery of construction projects. Presently construction industries are facing a lot of problems, considering that a paper assess construction stakeholder's perception to the causes of delays and its effects on project delivery. And also one case study is considered in this paper to elicit responses from construction stakeholders. The primary aim of this paper is to identify the perceptions of the different parties regarding causes of delays, the allocation of responsibilities and the types of delays, and method of minimizing the construction delays.

• Journal of Pharmaceutical Investigation
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• 제38권4호
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• pp.223-228
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• 2008

The purpose of this study was to investigate the feasibility of developing transdermal drug delivery system (TDDS) for fentanyl used for the management of chronic cancer pain. The effect of type of pressure sensitive adhesive on the permeation of fentanyl from polyisobutylene (PIB), silicone and acrylic adhesive was evaluated. Due to the good adhesive force and relatively steady flux for 3 days, both acrylic and PIB adhesives were chosen for further study. The permeation rate of fentanyl was the highest from acrylic adhesive with hydroxyl functional group. Permeation rate increased linearly as the concentration of fentanyl in acrylic adhesive was increased from 2.5% to 10%. In case of PIB adhesive, crystals of fentanyl were developed above 5% drug load. $Crovol^{(R)}$ A40, $Crovol^{(R)}$ PK40 and Plurol $oleique^{(R)}$ provided higher flux of fentanyl.

• 산업공학
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• 제13권1호
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• pp.110-119
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• 2000

Resource-constrained project scheduling is to allocate limited resources to activities to optimize certain objective functions and to determine a start time for each activity in the project such that precedence constraints and resource requirements are satisfied. This study suggests a multi-project scheduling model which can level work loads, make the most of production capacity and restrain the delay of delivery by developing a heuristic algorithm which minimizes the project completion time and maximizes the load rate under resource constraints.

• Journal of Pharmaceutical Investigation
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• 제41권1호
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• pp.1-7
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• 2011

The effects of different formulation variables including pressure sensitive adhesive (PSA), permeation enhancer, thickness of the matrix and loading amount of drug on the transdermal absorption of galantamine were investigated across the hairless mouse skin. The permeation profile of galantamine was different depending on the types of PSA, loading amount of drug, thickness of the matrix and type of enhancer used. Highest flux of galantamine was obtained from acrylic PSA but crystals were formed in the patch within 72 h. Among the PSAs screened, crystal formation was not observed only in the patches formulated in Styrene Butadiene Styrene (SBS) matrix. Permeation rate increased linearly as the concentration of galantamine in SBS matrix increased from 2.5 to 15% w/w. Among the enhancers screened, Brij$^{(R)}$ 30 provided highest flux of galantamine. Matrix thickness of 80 ${\mu}m$ was optimum for maintaining adhesiveness as well as consistently delivering galantamine for longer period of time.

• 한국포장학회지
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• 제26권2호
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• pp.99-103
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• 2020

The volume of parcel delivery is steadily increasing with the rapid growth of the global online e-commerce market. However, a large amount of packaging materials used for these parcel delivery is finally causing environmental problems as waste. In this study, we have taken a pilot test on the returnable parcel delivery packaging & service, which is one of various ways to reduce the generation of the distribution packaging waste raised by e-commerce-based parcel delivery. For the purpose of this project, we made 300 boxes of returnable & foldable delivery packaging(415 mm × 280 mm × 160 mm) and have cooperated with e-commerce company(CJ ENM) & logistics company(LogisAll). Consequently, about 50% of the delivered packages was returned because of the lack of consumer's understanding on the returnable packaging system. We finally have suggested the policy strategy to get over problems derived from the experiment, like the retrieval rate and cost of the returnable packaging, economic efficiency and so on.

• 국제학술발표논문집
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• The 3th International Conference on Construction Engineering and Project Management
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• pp.440-448
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• 2009

Concurrent construction (or overlapping) is an alternative project delivery process to reduce time-tomarket such that the owner can get higher profits; the increased profits due to shortened project duration would exceed the loss of profits from the increased cost, if any. For more effective concurrent construction, a new conceptual framework for concurrent construction planning is suggested. With multiple work methods available in each activity, the performance of overlapping between two activities in terms of cost is affected by the compatibility between work methods selected and the benefit to the project owner is determined by internal rate of return (RoR). The impact of the compatibility between work methods and the conceptual framework are explained by a hypothetical case study.