• Journal of Construction Engineering and Project Management
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• 제9권2호
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• pp.1-24
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• 2019

Poor project performance has been noted as the bane in the construction industry globally. This paper sought to investigate, by way of literature, the performance patterns of construction projects in Kenya since independence (1963-2018). This was informed by reports of undesirable project performance in the industry. This descriptive study used available studies previously done in this subject area. In sum, literature is replete with evidence on a myriad of challenges facing the execution of projects. The study established that generally, the project performance is poor and has assumed a chronic trajectory spanning over five decades. On average, the findings reveal that 35-60% of projects initiated in Kenya face cost overruns while time overrun is most severe with 35-73% projects overrunning their schedule. In addition, the findings problematize the issue of plurality of performance measurement regimes in the construction industry. Here, it was observed that no singular construct exists to objectively measure the various facets that constitute the 'health' of a project. This paper has contributed to the body of knowledge by examining the performance patterns in Kenya for over fifty years while at the same time identifying the bottlenecks inherent in projects execution. Importantly, the conceptual performance efficiency framework derived in the current study presents a paradigm shift in the monitoring and evaluation of projects. To this end, an in-depth analysis is recommended on the interaction of efficiency enablers in the buildup of performance efficiency index (PEI). Similarly, a further inquiry is recommended on the integration and impact of the proposed framework in the management of projects.

• 재활치료과학
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• 제10권1호
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• pp.115-127
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• 2021

목적 : 본 연구는 원격재활에 기반 한 작업치료가 뇌졸중 환자의 실행기능, 일상생활수행, 작업수행에 영향을 미치는지 알아보고자 한다. 연구방법 : 지역사회에 거주하며, 재활병원에 외래로 통원하는 환자 30명을 실험군과 대조군에 각각 15명씩 무작위 할당하여 연구를 진행하였다. 실험군 집단과 실험군의 중재는 모두 주 3회 18회기로 실시하였다. 실험군 15명에게는 전통적 작업치료와 함께 더불어 가정에서의 원격재활 기반 프로토콜을 적용하였다. 대조군 15명은 전통적 작업치료만 실시하였다. 실험 참가자의 실행기능과 수단적 일상생활수행은 실행기능 수행평가 한국판(Executive Function Performance Test Korean version; EFPT-K)으로 측정하였고, 기본적 일상생활활동은 수정된 바델 지수(Modified Barthel Index; MBI), 작업수행은 클라이언트 중심의 과제수행을 측정하기 위해서 캐나다 작업수행 측정(Canadian Occupational Performance Measure; COPM)을 이용하였다. 결과 : 중재 후 실험군과 대조군은 모두 실행기능, 수단적 일상생활활동, 작업수행에서 유의한 변화가 있었으나(p<.05), 기본적 일상생활수행에서는 유의한 변화가 없었다. 집단 간 비교에서는 작업수행에서만 실험군이 대조군보다 유의하게 더 많은 증진이 나타났다. 결론 : 원격재활과 작업치료는 뇌졸중 환자의 실행기능, 수단적 일상생활수행, 작업수행의 향상에 긍정적인 영향을 미친다. 작업치료에 병행된 원격재활은 뇌졸중 환자의 작업수행에 추가적인 효과가 있음을 근거로써 제시한다.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2006년도 춘계 학술발표회 논문집(II)
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• pp.409-412
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• 2006

In process of reinforced concrete(RC) box structure, the heat of hydration may cause serious thermal cracking problems. In order to eliminate hydration heat of mass concrete, this paper reports results of hydration heat control in mass concrete using the OCHP(Oscillating Capillary tube Heat Pipe). Recently OCHP is drawn special attention from these points of low cost as well as short construction schedule for the manufacturing of heat exchanger, flexibility, simplification and high performance. There were three RC box molds$(1.2{\times}1.2{\times}1.2m)$ which shows a difference as compared with each other. One was not equipped with OCHP. While others were equipped with OCHP and these were cooled with air natural convection and spraying water respectively. The OCHP was composed of copper pipe with 12 turns(O.D : 4mm, I.D : 2.8mm). The working fluid was R-22 and its charging ratio was 30(Vol. %). In order to analyze the distribution of temperature and index figure of thermal crack in sequential placement of mass concrete, we used HYCON of computer program. As a result of the experiment, the peak temperature decreased about $15.6\sim23.4^{\circ}C$ than the general specimen and the probability of thermal crack generated in mass concrete decreased up to 0%.

• 대한조선학회논문집
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• 제42권5호
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• pp.542-549
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• 2005

Naval ships are complex weapon systems which play the integrated performance by system integration of many kinds of weapon systems and their leading ships are usually not disposed after test and evaluation but militarised. Then, strict project management is required for naval ship building projects by identifying problems early and by taking prefer measures in time against unexpected situations encountered in the process of the projects. EVMS is a project management system which can manage the schedule and the budget of a project concurrently and estimate the project's time duration and the cost at project completion. In this paper, the applicability and usefulness of WMS is studied for a assumed navai ship building project, in the environment of monetary fluctuations such as price index, wage increase rate and exchange rate.

• 한국건축친환경설비학회 논문집
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• 제12권6호
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• pp.627-640
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• 2018

Submetering electricity consumption data enables more detail input of end use components, such as lighting, plug, HVAC, and occupancy in building energy modeling. However, such an modeling efforts and results are rarely tried and published in terms of the estimation accuracy of electricity demand. In this research, actual submetering data obtained from a university building is analyzed and provided for building energy modeling practice. As alternative modeling cases, conventional modeling method (Case-1), using reference schedule per building usage, and main metering data based modeling method (Case-2) are established. Detail efforts are added to derive prototypical schedules from the metered data by introducing variability index. The simulation results revealed that Case-1 showed the largest error as we can expect. And Case-2 showed comparative error relative to Case-3 in terms of total electricity estimation. But Case-2 showed about two times larger error in CV (RMSE) in lighting energy demand due to lack of End Use consumption information.

• 한국전문물리치료학회지
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• 제8권1호
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• pp.9-19
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• 2001

During therapy sessions, feedback is often provided concurrently by the physical therapist as the patient attempts to perform a movement and after the movement attempt. This feedback is provided to enhance the patient's balance abilities. However, recent studies in nondisabled populations have suggested that frequent feedback may be detrimental to retention or learning of motor skills. This study compared the effects of 100% relative frequency of knowledge of performance (KP) with 66% relative frequency of KP for motor learning on balance retraining in patients with hemiplegia. Twenty patients with hemiplegic were randomly assigned to one of two experimental groups. The acquisition phase consisted of 16 blocks of 5 trials for 2 days (80 total practice trials). The retention phase consisted of 2 blocks of a short-term retention test, one day after the end of the acquisition phase and a long-term retention test, one week after the end of the short-term retention test. In the 100% feedback condition, participants received feedback after every practice trial. A faded KP schedule was used in the 66% condition. No significant differences were found between the two groups during all experimental phases (acquisition and retention phases), (p>.05). However, there were significant decreases in balance index for both groups of acquisition phase (p<.05). These results suggest that 66% relative frequency of KP is not more effective than 100% relative frequency of KP with respect to retention over time when hemiparetic patients attempt to learn balance.

• 전자공학회논문지 IE
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• 제48권4호
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• pp.69-77
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• 2011

최근 들어 공공분야 정보화 프로젝트 분야의 규모와 형태가 대형화, 복잡화, 다양화되고 있으며 이런 정보화 프로젝트 성과 관리 모델에 관해 지속적으로 연구가 진행되고 있다. 이에 관한 연구조사 및 파악에 의하면 예전에 비해 정보체계 프로젝트의 규모와 수가 증가되었지만 요구사항 관리 미흡, 일정지연, 예산초과, 기대목표 미달성 등 사용자 요구사항 미충족에 따라 사전에 중대한 위험요소를 관리하는 체계적인 방안이 필요한 것으로 나타났다. 따라서 본 연구에서는 이러한 위험요소에 사전대응 및 조치하여 성공률을 높이기 위하여 공공분야 정보화 프로젝트의 다양한 경험을 지닌 전문가 및 관리자들이 인식하고 있는 위험요소를 파악, 프로젝트 영역별 각 위험요소들에 대해 공공부문 프로젝트 지원팀인 2개업체를 대상으로 설문조사를 실시하여, 이들 위험요소가 공공분야 정보화 프로젝트에 미치는 영향을 통계적기법으로 확인하고 프로젝트 해당 영역의 위험요소가 다른 프로젝트의 영역에 미치는 상관관계 지수를 파악하고자 한다.