• Proceedings of the Korean Institute of Building Construction Conference
• /
• 2015.11a
• /
• pp.68-69
• /
• 2015

Traditional External Insulation Finishing System(EIFS) is applied to apartment construction by performing structural framework and insulation finishing work sequentially. Separate execution of the three works increases construction cost and duration. Concurrent construction method of EIFS, which performs framework and insulation finishing work simultaneously, is introduced in order to solve these problems. However, the introduced method is exposed to the risk of construction delay caused by bottlenecks due to interacting processes and resources. Therefore, this paper presents a simulation model suitable for estimating work productivity of the concurrent construction by considering predecessor and successor processes to optimize resource allocation and minimize construction delay.

• Laser Solutions
• /
• v.4 no.1
• /
• pp.29-38
• /
• 2001

This work was carried out to investigate the welding behavior of thin A3003 Al alloy sheets by Nd : YAG laser beam. Considering bead shape and mechanical properties, the laser pulse shapes selected were two kinds of 2-division and 3-division by varying power level and pulse duration. In order to obtain optimum conditions, the factorial design method and central composite design method were applied. Tensile test, optical microscopy, micro hardness test and TEM analysis were performed. Due to the annealing caused by thermal effect during laser welding, precipitates were coarsended. The HAZ was softened and failed during tensile test. The hardness of HAZ was lower than that of base metal, since the heat input relieved the work hardening effect and caused grain growth.

• Proceedings of the Korean Institute of Building Construction Conference
• /
• 2016.05a
• /
• pp.60-61
• /
• 2016

The specialty of Construction Manager's work is largely depends on the project progress stage and the type of management work. However, at present, career management system manages only the type and duration of the construction project, disregarding specialty and competence. However, in order to select a right construction manager for the client's needs or project characteristics, career management should be subdivided and managed according to the project progress stages or the types of management. In addition, this career management plan is essential for construction managers to receive appropriate wages for their careers and competences. Therefore, this study proposes a classification system for the integration of career, work, and competency to promote effective career management.

• Journal of Family Resource Management and Policy Review
• /
• v.13 no.2
• /
• pp.65-83
• /
• 2009

The purposes of this study were to analyze the needs for the balance of work-family and to provide the related policies for dual worker family. We focused on the life area of educare and school. Data were collected from 197 working mothers who have 1 or more children under age 10. The findings were: 1) after-school programs, holidays on every alternate Saturday, arbitrary no school days were not appropriate to the working parents' everyday life patterns, so the paradigm and practical conditions should be adapted to the needs of working parents. 2) the most working parents depended on the kindergarden, but the parents' satisfaction with the quality of service, time duration, the human resource of educare teacher was not sufficient, so these issues should be discussed more profoundly.

• Korea Journal of Hospital Management
• /
• v.19 no.1
• /
• pp.43-53
• /
• 2014

The objective of this research is to survey of knowledge management in hospitals and to search the factors to impact the knowledge sharing and innovation behavior among employees. The data is collected with hospital employees by questionnaire method. Total number of analysis is 779 cases, and the collected data is analyzed by SEM(structural equation model). The work performance(WP) make influence the innovation behavior(IB) through knowledge sharing(KS) intention. The KS intention and IB are different in sex, age, education, work duration and work level. But, WP is different only in sex. The only personnel and organizational factors to affect KS intention, WP and IB are reciprocity(in personnel factor) and trust(in organization factor). Those factors mean the mental or psychological relationship among employees. So, to make more developed knowledge management in hospitals is to need more personal relationship than any other system management or incentives.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• v.15 no.4
• /
• pp.1389-1408
• /
• 2021

Proof-of-Work (PoW) is the first and still most common consensus protocol in blockchain. But it is costly and energy intensive, aiming at addressing these problems, we propose a consensus algorithm named Proof-of-Work-and-Block-Compression (PoW-BC). PoW-BC is an improvement of PoW to compress blocks and adjust consensus parameters. The algorithm is designed to encourage the reduction of block size, which improves transmission efficiency and reduces disk space for storing blocks. The transaction optimization model and block compression model are proposed to compress block data with a smaller compression ratio and less compression/ decompression duration. Block compression ratio is used to adjust mining difficulty and transaction count of PoW-BC consensus protocol according to the consensus parameters adjustment model. Through experiment and analysis, it shows that PoW-BC improves transaction throughput, and reduces block interval and energy consumption.

• Journal of Agricultural Extension & Community Development
• /
• v.28 no.4
• /
• pp.215-229
• /
• 2021

This study aims to identify the factors influencing the registration of managers or co-managers in agricultural management in the field of work and life of female farmers and to derive implications for expanding the registration of female farmers as managers and securing the status of women. In this study, binomial logit analysis was conducted with 1,043 questionnaire responses collected on&offline to achieve the research purpose. As a result of the analysis, it was found that the duration of farming, decision-making initiative, the experience of the supporting policies for farming activity, the activities of the crop group/research or female farmer's group, and the experience of supporting policies for self-development and leisure activities had a statisticallty significant effect on the registration of female farmers.

• International conference on construction engineering and project management
• /
• 2009.05a
• /
• pp.440-448
• /
• 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.

• Journal of the Ergonomics Society of Korea
• /
• v.35 no.5
• /
• pp.383-389
• /
• 2016

Objective: In this paper, work time for the representative fruit crops are collected and analyzed using time-diary method, and the collected data were compared with the directly observed work time using GPS device. Background: There is no consistent conclusion which measurement method for work time is accurate. Most of the research results were collected from the environment other than rural area. Therefore, there is need to review reliability of the measurement methods for the agricultural work which are carried out for a long duration. Method: Top five crops (apple, pear, grape, sweet persimmon, and peach) were selected according to the number of farms and cultivation areas. We let fruit growers fill a work diary during one cropping period. A difference between the work-time that was recorded by the farmers and the direct observed worktime using GPS device were analyzed. Results: Average direct work time for the five fruit crops found to be 7.1% of the total work time. Conclusions and Applications: Reliability was secured by recording the daily work diary at each work stage while aware that direct observation is carried on. Data which are being collected by government institutions are obtained by the memories of the respondents. Therefore, it is needed to try the method adopted by this study in order to collect more accurate data.

• Korean Journal of Social Welfare
• /
• v.64 no.2
• /
• pp.5-29
• /
• 2012

This study examines the present conditions and antecedent factors affecting helping professions' cultural competence, focusing on such groups as social workers, teachers, nurses, and social work civil servants. The analysis of data shows that teachers' cultural competence is the highest, social workers, social work civil servants, and nurses are descending order. The study also found significant antecedent factors: (1)individual antecedent factors are age, education, and foreign language skill; (2)work-related antecedent factors are multicultural working hours and working duration; (3)organizational antecedent factors are education/training and organizational support. Finally, the study suggests policy directions and practical implications for enhancing cultural competence.