• Proceedings of the Korea Information Processing Society Conference
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• 2009.11a
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• pp.859-860
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• 2009

현재 Powerpoint는 팀 프로젝트에도 불구하고 PPT파일을 혼자서 만들고 수정해야 하면서 한 사람이 많은 시간을 소비해야한다. 또는 여러 명이서 각각의 페이지를 따로 만들고 한 사람이 각자가 만든 페이지를 받아 하나의 파일로 합쳐야하는데 이 방법은 비효율성과 불편함이 존재한다. 따라서 하나의 PPT파일을 여러 명이서 동시에 접속하여 각자의 페이지를 만들면서 시간도 절약하고 불편함과 비효율성을 제거하기 위하여 이 프로그램을 제안한다.

• Korean Journal of Construction Engineering and Management
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• v.6 no.6 s.28
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• pp.90-97
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• 2005

Poor usage of work-continuity for planning and management is one of the leading causes of decreased productivity in high-rise and complexity construction projects. For efficient finish work, tact scheduling method needs to be implemented according to tact time. But there are the studies about zoning of work area, daily construction information and tact planning and management, there are not the studies about tact time yet. The purpose of this study is to help implementation of tact scheduling by tact time and adjusted work-plan. The main contents of this study are as follow; (1)Tact time has been calculated as coordination of work-plan between a general contractor and specialties. (2)Project-plan can be without delay by tact time calculation method.

• Proceedings of the KIEE Conference
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• 2002.11b
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• pp.358-360
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• 2002

한국전력은 당진화력발전소로부터 신안성 변전소까지의 세계 최초로 수직배열 2회선의 765kV 송전선로를 건설하여 2002년 4월부터 1회선을 765kV로 가압하고 1회선은 345kV로 상업운전을 시작하였으며 2003년 이후 2회선을 모두 765kV 전압으로 가압 예정이다. 이러한 765kV 송전선로는 계통운영 측면에서 2회선 동시 휴전이 어려워 1회선 휴전 작업 및 향후 활선작업이 요구되는 중요선로이다. 765kV 1회선 휴전작업을 위해서는 765kV로 가압된 선로로부터 휴전선로의 작업자에게 발생될 수 있는 전기적 유도량에 대해 사전 검토하여 안전성을 확보하는 것이 필수적이다. 한국전력공사와 전력연구원은 1회선 휴전작업에 대한 안정성 검토를 위해 고창 실증시험선로를 이용하여 전기적 유도현상에 대한 시험을 실시하였다. 이 논문에서는 실증시험 선로를 모델로한 정전유도의 계산 결과와 실측치를 각각 비교, 검토하였다.

• Journal of the Korea Society for Simulation
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• v.27 no.2
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• pp.71-81
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• 2018

Forklifts in a shipyard lift and transport heavy objects. Tasks occur dynamically and the rate of the task occurrence changes over time. Especially, the rate of the task occurrence is high immediately after morning and afternoon business hours. The weight of objects varies according to task characteristic, and a forklift also has the workable or allowable weight limit. In this study, we propose an online forklift dispatching algorithm based on nearest-neighbor dispatching rule using minimal cost assignment approach in order to attain the efficient operations. The proposed algorithm considers various types of forklift and multiple jobs at the same time to determine the dispatch plan. We generate dummy forklifts and dummy tasks to handle unbalance in the numbers of forklifts and tasks by taking their capacity limits and weights. In addition, a method of systematic forklift selection is also devised considering the condition of the forklift. The performance indicator is the total travel distance and the average task waiting time. We validate our approach against the priority rule-based method of the previous study by discrete-event simulation.

• Korean Journal of Construction Engineering and Management
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• v.22 no.6
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• pp.131-137
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• 2021

Since many resources are put into the work of changing the railway operation within limited time, it is important to have a specific work plan and safety management. For this reason, the work schedule is shared in advance, and parallel work is being carried out simultaneously by rail system, such as tracks, trolly wires, and signals. However, due to the nature of the transfer work, the work is carried out at night when the railway operation is finished, and many resources are put into the limited area of the operating line, so the risk of safety accidents and failure to change the operating line is recognized as high. Nevertheless, there is still not enough research done in korea regarding the operation line change construction. Therefore, this study is conducted a survey on the track exchange work of railroad for working people, and analyzed the results of the survey. Finally, a standard work process was suggested to reduce the risk of track exchange work.

• Journal of Bio-Environment Control
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• v.30 no.4
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• pp.359-366
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• 2021

This study aimed to develop and verify the smart human resource management (HRM) program in a large scale greenhouse. HRM program delivers detailed work orders to workers and gathers work results by mobile phone application. Greenhouse managers can monitor the workload, work speed, quality of employee by HRM program and can analyse performance easily. Greenhouse Managers can set the work speed including 'twisting', 'trimming' and 'harvesting' in a greenhouse. It makes planning work schedule and assigns resources to each specific job easier. Therefore, the manager can arrange the number of employees to promote work performance and also easy to estimate the labor shortage. Greenhouse managers can evaluate the adequacy of the number of employees through job performance analysis by period and adjusts the supply/demand ratio of regular and non-regular employees. The HRM program can improve work efficiency by announcing the real-time work performance of all employees on a monitor screen to induce competition among workers and re-educate unripe employees who accomplish behind average to improving work skills.

• The Transactions of the Korea Information Processing Society
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• v.7 no.9
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• pp.2827-2835
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• 2000

In recent years, much attention has been focused on improving I/O devices' processing speed which is essential in such large data processing areas as multimedia data processing. And studies on high-performance parallel file systems are considered to be one of such efforts. In this paper, an efficient disk allocation scheme is proposed for high-performance parallel file systems. In other words, the concept of a parallel disk file's parallelism is defined using data declustering characteristic of a given parallel file. With the concept, an efficient disk allocation scheme is proposed which calculates the appropriate degree of data declustering on disks for each parallel file in order to obtain the maximum throughput when more than one parallel file is used at the same time. Since, calculation for obtaining the maximum throughput is too complex as the number of parallel files increases, an approximate disk allocation algorithm is also proposed in this paper. The approximate algorithm is very simple and especially provides very good results when I/O workload is high. In addition, it has shown that the approximate algorithm provides the optimal disk allocation for the maximum throughput when the arrival rate of I/O requests is infinite.

• Composites Research
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• v.12 no.6
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• pp.43-52
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• 1999

This paper explains the development of a concurrent engineering system for the rlesign of composite structures. The concurrent engineering system is developed to meet the demand for the better quality products with lower production cost and time. In this study, to compose the architecture of concurrent engineering system, the commercial and noncommercial programs related to design and analysis of composite structures are surveyed and classified. The concurrent engineering system is including various design modules such as design/analysis of composite structures using CLPT and FEM, buckling and post bucking analysis, thermo-elastic analysis of carbon-carbon composite, and optimum design using expert system and genetic algorithm. For the integration and management of softwares, the concurrent engineering system is realized by Microsoft visual $C++{^\circledR}$ that provide multi-tasking and graphic user interface environment.

• Journal of the Korea Institute of Building Construction
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• v.10 no.4
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• pp.31-39
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• 2010

As the linear scheduling method has been used since the Empire State Building linear schedule in 1929, it is being applied in various fields, such as construction and manufacturing. When addressing concurrent critical paths occurring in a linear construction schedule, empirical researches have stressed resource management, which should be applied for optimizing workflow, ensuring flexible work productivity and continuous resource allocation. However, work relationships have been usually overlooked in making the linear schedule from an existing network schedule. Therefore, this research analyzes the previous researches related to the linear scheduling model, and then proposes a method that can be applied for adopting the relationships of a network schedule to the linear schedule. To this end, this research considers the work relationships occurring in changing a network schedule into a linear schedule, and then confirms the activities movement phenomenon of linear schedule due to workspace change, such as physical floors change. As a result, this research can be used as a basic research in order to develop a system generating a linear schedule from a network schedule.

• Korean Journal of Construction Engineering and Management
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• v.15 no.4
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• pp.49-57
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• 2014

Since the structure systems of construction projects have been forced to be large, high-rised, and complex, many researchers have been put their efforts to develop high strength concrete incorporating diverse advanced materials. In order to improve the performance of the concrete, the fibers leading high ductility to concrete have been used, consequently concrete columns adopting High-Performance Fiber Cement(HPFC) have been developed. This paper analyzed not only the construction work process of HPFC column installed to the real construction project, but also construction productivity of the columns by using discrete event simulation technique. As a result, several considerations on installing such a column have identified, compared with the works for typical concrete columns. In particular, there was specific characteristic to install the columns in terms of labor resource productivity, which is not shown with the work for the typical concrete columns.