• Korean Journal of Construction Engineering and Management
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• v.1 no.4 s.4
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• pp.74-81
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• 2000

The duration of construction in the construction works contains non-working days as well as working days. The duration is so relevant to climate that it should be calculated after fully considered about the regional climate in which construction processes. In most construction fields, however, there has been a frequent adjustment of duration because the field supervisor's experiences have decided non-working days indiscriminately without any accurate information about weather. Not only has that done great economic damages, but also caused many problems in interests among construction subject. So, in this study, we will analyse the elements of climate which has influences on the duration and implement the hypothetical weather simulation. By connecting the results of simulation with the duration of construction, we will propose the decision-making support model for the efficient calculation of duration when the field supervisor makes the projects schedule.

• Korean Journal of Community Nutrition
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• v.1 no.2
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• pp.250-259
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• 1996

The school foodservice(FS) dietitians of conventional, co-management and central kitchen systems were compared for their levels of fatigue degrees in order to examine their work specification but no to diminish their educational roles. One hundred and thirtheen primary schools in Taejon and Chungcheongnam-Do participated in the survey, of which foodservice were consisted of 99 conventional types, 7 comanagement types and central kitchen types. Information was collected about the various working hours dietary behavior and fatigue symptoms of the dietitians. The results of this study were as follows : Among 3 school foodservice types, dietitians spent 8 hours and 16 minutes daily for their for their work on the average. However, the central kitchen type dietitans in cities spent 3 hours more compared to the others. The data from the dietitians' work schedule sheets showed that the 5 parts of dietitian's duties set in the school foodservice laws were not well performed. In the central kitchen type they spent more time for food production whereas in the conventional they spent more time for menu formation and hygiene control. It was found that fatigue levels of school foodservice dietitians were chronic with no difference among foodservice systems or among school locations. Our results indicated that nutrition education in primary schools was almost neglected. It is suggested that the school foodservice should meet all the objectives of school-lunch program even though they saved dietitians' work load more or less. The importance of students to improve their dietary habits could never be overlooked. (Korean J Community Nutrition 1(2) : 250-259, 1996)

• Journal of KIISE:Computer Systems and Theory
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• v.26 no.11
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• pp.1333-1343
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• 1999

경성 실시간 시스템의 태스크들은 논리적으로 올바른 결과를 산출해야 하지만 또한 각자의 시간 제한 조건을 만족하여야 한다. 간격제한 스케줄링은 시간 제한 조건이 시간 간격 제한으로 주어지는 실시간 태스크들을 스케줄하기 위하여 도입되었다. 간격제한 스케줄링에서의 각 태스크들은 시간 간격 제한 조건을 갖는데, 이것은 태스크의 두 연속적인 수행의 종료시간에 대해 제한을 가한다. 다시 말해, 간격제한 스케줄링에서의 각 태스크 수행은 그 태스크의 직전 수행 완료 시간으로부터 발생하는 데드라인을 갖는다. 간격제한 태스크 스케줄링에 관한 많은 연구는 단순화 방법에 기초하고 있다. 그러나, 우리는 이 논문에서 단순화 방법을 사용하지 않고, 정적 우선순위 및 정적 분리 제한 정책을 채용한 새로운 간격제한 태스크 스케줄링 방법을 제안한다. 제안된 정적 할당 방법은 스케줄링 분석 및 구현을 매우 간단히 할 수 있으며, 또한 스케줄러의 실행시간 오버헤드를 줄일 수 있다.Abstract Tasks in hard real-time systems must not only be logically correct but also meet their timing constraints. The distance-constrained scheduling has been introduced to schedule real-time tasks whose timing constraints are characterized by temporal distance constraints. Each task in the distance-constrained scheduling has a temporal distance constraint which imposes restriction on the finishing times of two consecutive executions of the task. Thus, each execution of a task in the distance-constrained scheduling has a deadline relative to the finishing time of the previous execution of the task.Much work on the distance-constrained task scheduling has been based on the reduction technique. In this paper, we propose a new scheme for the distance-constrained task scheduling which does not use the reduction technique but adopts static priority and static separation constraint assignment policy. We show that our static assignment approach can simplify the scheduling analysis and its implementation, and can also reduce the run-time overhead of the scheduler.

• Journal of Korean Society for Quality Management
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• v.45 no.2
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• pp.247-260
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• 2017

Purpose: The study is aimed to identify the national cultural dimensions that are affecting the quality management (QM) maturity level and the project quality performance, and analyze their relationships. Methods: This study collected the data of QM Maturity level based on Crosby's QM maturity model and the project quality performance using the Iron Triangle (Quality, Time/Schedule and Cost) from the employees who are participating in the ITER Project across the major 8 countries (China, France, Italy, Japan, Korea, Russia, U.K. and U.S.A.). Three research hypotheses are proposed concerning the national cultural dimensions in this study and Hofstede's five cultural dimensions framework are used for the statistical test. Results: The results are two folds in the study: First, there is a significant positive correlation between the QM maturity level and the project quality performance. Second, three cultural dimensions (Collectivism, Large Power Distance and Strong Uncertainty Avoidance) and five cultural dimensions (Collectivism, Large Power Distance, Strong Uncertainty Avoidance, Feminity and Long Term Orientation) have a positive impact on the QM maturity level and the project quality performance respectively. Conclusion: From the results, the understanding and consideration of the culture difference among the countries participating International Collaboration R&D project are recommended.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• autumn
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• pp.442-445
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• 2002

Construction delay claim occurs more often than any other claim. Delay claim impacts adversely the company's existence as well as the project's monetary problem. Because the calculation of the delay is not quantitative, owing not to have enough evidence, it is hard to solve evenly the delay claim. So, it is need to cumulate structurely the construction data or evidence during the construction. This study considers the established study about construction delay claim database and the problems and then presents the relation method between phase schedule and database. Finally, this study established the productivity claim database modeling for construction project through conceptual database modeling and logical database modeling based on information needed to make construction productivity database. So. the purpose of the study is to establish the datamodel for productivity management of construction project for calculating the delay days considering the lost productivity.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• autumn
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• pp.638-641
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• 2003

This paper suggests that construction management services should be performed considering the owner's and the project's characteristics through the examples of the successful projects. For this study, the critical CM services in each phase regarding schedule management, cost management and information management are presented and the problems of the CM delivery system in Korea are analyzed with respect to policies, users, suppliers/CMrs and construction environments. Besides, the situation of the delivery systems in Korea and the differences of each delivery system are presented. It is concluded that, for the settlement of CM delivery system in public construction market and, ultimately, the successful execution as an agent of the owner, CMr should diversify the services and give the optimum CM services appropriate for each project's characteristics.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• autumn
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• pp.40-47
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• 2003

The main purpose of Construction Management(CM) is the improvement of efficiency and effectiveness of the project with construction methodologies systematically and technically. This pilot project Dong Myeong Service Area and Gas Station project among 5 projects designated and supervised by Ministry of Construction and transportation(MOCT), is to reduce cost, to maintain and control schedule, to keep proper quality, Claim and Risk through Partnering, Design Review, Constructability, Value Engineering and Project Management Information System(PMIS) and so on. Major factors of CM Plan are introduction of the phased and classified Construction Management Services from initiation of project to completion and adaptation of CM technologies and guide the implementation methodologies of the CM Pilot Project in CM construction market.

• The KIPS Transactions:PartC
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• v.12C no.5 s.101
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• pp.695-700
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• 2005

To provide the fair rate and achieve the fair bandwidth allocation, many per-flow scheduling algorithms have been proposed such as fair queueing algorithm for congestion control. But these algorithms need to maintain the state, manage buffer and schedule packets on a per-flow basis; the complexity of these functions may prevent them from being cost-effectively implemented. In this paper, therefore, to acquire cost-effectively for implementation, we propose a CS-FNE(Core Stateless FNE) algorithm that is based on FM(Flow Number Estimation), and evaluated CS-FNE scheme together with CSFQ(Core Stateless Fair Queueing), FRED(Fair Random Early Detection), RED(Random Early Detection), and DRR(Dynamic Round Robin) in several different configurations and traffic sources. Through the simulation results, we showed that CS-FNE algorithm can allocate fair bandwidth approximately than other algorithms, and CS-FNE is simpler than many per-flow basis queueing mechanisms and it can be easily implemented.

• Journal of KIISE:Computer Systems and Theory
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• v.31 no.7
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• pp.387-396
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• 2004

In this paper, we propose an algorithm that distributes processor time to the tasks decoding encoded frames with a goal maximizing total QoS (quality of services) of video conference system. An encoded frame has such a characteristic that the QoS of recovered frame image also increases as the processor time given for decoding the frame gets to increase. Thus, the quality of decoded image for each frame can be represented as a QoS function of the amount of service time given to decode. In addition, every stream of video conference has close time-dependency between continuous frames belonging to the same stream. Based on the time-dependency and QoS functions, we propose an on-line frame scheduling algorithm which does not schedule all frames in the system but just a few frames while maximizing total QoS of video streams in the conference. The simulation results show that, as the system load gets to increase, the proposed algorithm compared to the existing EDF algorithm can reduce the quality of decoded frame images more smoothly and show the movements of conference attendees more naturally without short cutting.

• Journal of KIISE:Software and Applications
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• v.36 no.11
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• pp.920-927
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• 2009

In this paper, we developed a system that could assist appropriate activities for medication compliancy of the elderly. It employs a proactive knowledge which is represented as XML templates predefined for their medication activities. The knowledge-based assistance depends on the contexts considerably, which the system can recognize by continuously monitoring the current position and the time-schedule for their medications. The monitoring can be performed with ultrasonic sensors and infrared sensors mounted in a display and a pillbox respectively. According to the recognized contexts, the medication activities required by the elderly can be serviced through user-friendly multimedia display. In special, our experiment evaluates that the developed system is able to enhance the medication compliancy of chronic disease patients.