• 산업공학
• /
• 제25권2호
• /
• pp.216-228
• /
• 2012

BIM-based 4D simulation makes people easily understand complex construction process using 3D graphics model and helps them review and identify the construction schedule in each phase of the construction process. Moreover, 4D simulation can be used as reference data to determine the validity of the process in the design phase and will be utilized as a measure for checking the construction process. Therefore 4D simulation of construction improves efficiency of project management. However, current commercial applications available for 4D simulation do not provide sufficient functions for connection of 3D models and process information. In this paper, we propose an automated generation method through the definition of the process based on a work method template and developed the template based schedule generation system (TSGS).

• Structural Engineering and Mechanics
• /
• 제73권1호
• /
• pp.97-108
• /
• 2020

This study presents a 4 node, 11 DOF/node plate element based on higher order shear deformation theory for lamina composite plates. The theory accounts for parabolic distribution of the transverse shear strain through the thickness of the plate. Differential field equations of composite plates are obtained from energy methods using virtual work principle. Differential field equations of composite plates are obtained from energy methods using virtual work principle. These equations were transformed into the operator form and then transformed into functions with geometric and dynamic boundary conditions with the help of the Gâteaux differential method, after determining that they provide the potential condition. Boundary conditions were determined by performing variational operations. By using the mixed finite element method, plate element named HOPLT44 was developed. After coding in FORTRAN computer program, finite element matrices were transformed into system matrices and various analyzes were performed. The current results are verified with those results obtained in the previous work and the new results are presented in tables and graphs.

• 지식경영연구
• /
• 제20권2호
• /
• pp.183-195
• /
• 2019

The objective of this paper is to present how to use Grounded Theory Methodology for conducting a literature review that produces new insights and conceptualizations. In this paper, we have employed Wolfswinkel et al.(2013)'s method, which is called by Grounded Theory Literature-Review Method, for a rigorous literature review. We have utilized this method to capture the concept and insights of individuals' shadow wok in digital environments. By analyzing the relevant literature based on Wolfswinkel et al.'s guide, we have extracted 73 codes in the coding steps and finally showed 12 categories by incorporating similar concepts from those codes. Based on the categories, we end this paper by developing the academic definitions of shadow work in digital environments.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• 제13권9호
• /
• pp.4349-4371
• /
• 2019

Moldable parallel tasks are widely used in different areas, such as weather forecast, biocomputing, mechanical calculation, and so on. Considering the deadline and the speedup, scheduling moldable parallel tasks becomes a difficulty. Past work majorly focuses on the LA (List Algorithms) or OMA (Optimizing the Middle Algorithms). Different from prior work, our work normalizes execution time and makes all tasks have the same scope in normalized execution time: [0,1], and then according to the normalized execution time, a method is used to search for the reference execution time without considering the deadline of tasks. According to the reference execution time, we get an initial scheduling result based on AFCFS (Adaptive First Comes First Served) policy. Finally, a heuristic approach is used to improve the performance of the initial scheduling result. We call our method HSRET (a Heuristic Scheduling method based on Reference Execution Time). Comparisons to other methods show that HSRET has good performance in AWT (Average Waiting Time), AET (Average Execution Time), and PUT (Percentages of Unfinished Tasks).

• 한국건축시공학회:학술대회논문집
• /
• 한국건축시공학회 2021년도 봄 학술논문 발표대회
• /
• pp.309-310
• /
• 2021

In order to respond to environmental problems and to efficiently recycle resources, it is important to evaluate the amount of construction waste generated. In particular, the estimation of the amount of waste generated in the demolition work was performed based on the basic unit of waste generated per floor area. This study proposes a method using drones as a method for evaluating the amount of demolition waste in a wide area. In the simulated application, the field measurement results and the proposed method were compared, and the effectiveness of the building volume calculation using drones was confirmed. It was confirmed that the building volume can be calculated quickly in the additional pilot application.

• 한국건축시공학회:학술대회논문집
• /
• 한국건축시공학회 2022년도 가을 학술논문 발표대회
• /
• pp.41-42
• /
• 2022

This study analyzed the process related to the linkage between on-site work targeting the middle size Precast Concrete(PC) public apartment building with beam-column system and prepared on-site works flow relationship diagram in which the wet process consists of core Critical Path(CP) to prepare a network diagram of the Precedence Diagram Method(PDM). Through this study, it is expected that it will be possible to maximize the project management capability by suggesting a method to minimize risk factors and the optimized process management of the beam-column system PC public apartment building.

• 한국해양공학회지
• /
• 제23권2호
• /
• pp.87-91
• /
• 2009

The welding distortion of a hull structure in the shipbuilding industry is inevitable at each assembly stage. The geometric inaccuracy caused by welding distortion tends to preclude the introduction of automation and mechanization and requires additional man-hours for adjustment work during the following assembly stage. To overcome this problem, a distortion control method should be applied. For this purpose, it is necessary to develop an accurate prediction method that can explicitly account for the influence of various factors on the welding distortion. The validity of this prediction method must also be clarified through experiments. For the purpose of reducing the weld-induced bending deflection, this paper proposes the plastic counter-deforming method (PCDM), which uses line heating as the optimum distortion control method. The validity of this method was substantiated by a number of numerical simulations and actual measurements.

• Journal of Welding and Joining
• /
• 제21권4호
• /
• pp.75-79
• /
• 2003

The welding distortion of a hull structure in the shipbuilding industry is inevitable at each assembly stage. This geometric inaccuracy caused by the welding distortion tends to preclude the introduction of automation and mechanization and needs the additional man-hours for the adjusting work at the following assembly stage. To overcome this problem, a distortion control method should be applied. For this purpose, it is necessary to develop an accurate prediction method which can explicitly account for the influence of various factors on the welding distortion. The validity of the prediction method must be also clarified through experiments. For the purpose of reducing the weld-induced bending deflection, this paper proposes the plastic counter-deforming method (PCDM) using the line heating as the optimum distortion control method. The validity of this method has been substantiated by a number of numerical simulations and actual measurements.

• 간호행정학회지
• /
• 제9권4호
• /
• pp.515-527
• /
• 2003

Purpose: The purpose of this study was to examine the work stress and nursing performance of clinical nurses' and to identify relationship between work stress and nursing performance. Method: This descriptive study queried 316 clinical nurses, selected by convenient sampling from four hospitals. Demographic characteristics, work stress and Nursing performance were measured. Descriptive statistics, t-test, ANOVA were performed to identify relationship between work stress and nursing performance on SPSS WIN 10.0. Result: The study subjects reported that the younger they were, the higher work stress they experienced and the lower nursing performance they behaviored. Also, the longer they worked as a nurse, the lower work stress they experienced and the higher nursing performance they hehaviored. The nurses working at ICU experienced more work stress. The nurses working at pediatric ward reported higher nursing performance. The married nurses' nursing performance was higher than unmarried nurses'. There was significant negative correlation between work stress and nursing performance among nurses. Conclusion: These results suggest that the nurse who experience higher work stress couldn't perform optimistic leveled nursing performance. Strategic planning for nursing administer and avoidance of work stress were discussed.

• 한국농촌간호학회지
• /
• 제8권1호
• /
• pp.25-32
• /
• 2013

Purpose: The purpose of this study was to investigate the changing process of work activities of community health practitioners in medically vulnerable areas. Methods: For the study an historical research method was used, based on literature data and collected literature data related to the work of community health practitioners from 1940 to 2013. Results: There were 45 records according to the literature data about the work activities of the practitioners. Analysis of the process of work activities by time period was based on the historical records: first, the introduction period (1940~1980) saw the "community health practitioners begin their work activities"; second, the development period (1981~1997) involved "provision of comprehensive health and medical service"; third, the stagnation period (1998~2005) characterized by "attempts at new role changes in a crisis"; fourth, the expansion period (2006~2011) "focused on the work of health promotion"; and finally, the stable period (2012~the present) observed "work activities of community health practitioners recognized." Conclusion: Results showed five topics in the process of work activities of community health practitioners by time period. The results offer basic data to investigate work activities of these practitioners and enable discussions about the future of community healthcare.