• Korean Journal of Construction Engineering and Management
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• v.10 no.5
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• pp.113-122
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• 2009

The domestic construction market started to expand steadily since 1970s. The building market which utilizes a sandwich panel with advantages of economical construction expenses and convenient construction has grown rapidly in recent years. However, the companies which specialize in constructing sandwich panels are relatively small or medium size, compared with other construction companies. As a result, studies on the improvement of productivity have not been conducted sufficiently. In this study, the construction sites of sandwich panel are investigated, and the work processes by each team are analyzed. Additionally, the productivity and the construction cost of each work group are analyzed by constructing a model using the Web-Cyclone. It analyzed sensitivities about change of productivity and work costs following in processing place of the panel which is one of the productivity effect factors, so it assayed the optimized productivity by each work group and work costs. Analysis showed that 30% of productivity has improved compared with the factory processing work group, and analysis of work costs showed that about 15% of work costs was increased. Also sensitivity analysis of opening ratio showed that the work costs optimization will be accomplished when about 20% of opening was processed from the factory.

• Proceedings of the Acoustical Society of Korea Conference
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• autumn
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• pp.523-526
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• 2004

미숙련 작업자들에 의하여 생산되는 라우드스피커의 특성들을 분석하여 제작된 제품들의 품질 신뢰도를 분석하였다. 동일한 부품을 사용한 경우임에도 조립 제작과정에서 누적된 미확인 제작오차에 의하여 발생하는 스피커의 전기 임피던스와 음향응답특성등의 산포도를 분석하였다. 또한, 전기 임피던스 곡선들로부터 T-S 매개변수 규명법으로 규명한 스피커 매개변수들의 산포도도 분석하였다. 부품들의 질량에 대한 실측치와 매개변수법으로 규명한 결과를 비교하여 조립제작과정에서 이 값들의 변화 되는 정도도 분석하였다.

• Proceedings of the Korea Contents Association Conference
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• 2010.05a
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• pp.10-12
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• 2010

최근 바이오 데이터 분석을 위한 여러 가지 도구들이 있지만 대부분 특정 작업을 위한 작업에 치중되어 있으며 통합된 환경 제시는 아직도 미비한 상태에 있다. 또한 바이오 데이터 분석에 있어 국외의 도구나 데이터베이스에 의존도가 높은 국내 생명과학 분야의 실정을 고려한다면 국산화된 통합 분석환경이 요구되고 있다. 본 논문에서는 바이오 데이터 분석에 필요한 기본 요소들을 모델링하여 효율적인 시스템 개발의 방향제시를 하고자 한다.

• Therapeutic Science for Rehabilitation
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• v.9 no.2
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• pp.39-53
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• 2020

Objective : This study aims to identify the job market for occupational therapists by analyzing recruitment advertisements for occupational therapists from 2011 to 2018. Methods : A total of 15,869 job placement notices posted on the portal site(http://otbrain.com/) were collected to analyze the job market for occupational therapists based on their regions, employment types, salary levels, employment times, and recruitment fields. Results : The total number of annual recruitment advertisements for occupational therapists was 544 which was higher than the number of people who passed the national exam. According to the region, recruitments were concentrated in the Seoul and Gyeonggi Province. According to employment type, the employment rate of permanent workers was on the decline but that of temporary workers showed an increasing trend. The salary level was the highest with the annual salary ranging from 20 million won to 25 million won or less, and the recruitment fields were found to have about 4.6 times more offerings in the adult and senior fields than in the pediatric fields. Conclusion : These study results can be used as a basic data for identifying the job market for occupational therapists.

• Korean Journal of Construction Engineering and Management
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• v.21 no.1
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• pp.78-86
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• 2020

Dozer is an expensive construction equipment and has a significant performance impact on earthwork performance. A machine guidance system has been applied to dozer equipment as a solution that can improve the performance. The system can provide earthwork-related information to equipment operators so that earthworks can be carried out with minimum support from surveyors. Construction Equipment Machine guidance has the function of supporting earthwork according to an earthwork plan by providing excavation-related information to machine operators. The objective of this study is to evaluate the performance improvement of a machine guidance system for an dozer earthwork operation, and to compare the machine guidance method with the traditional method. The performance has been evaluated in two folds: 1) productivity and 2) accuracy. The productivity shows the quantity of earthwork for a given unit time. The accuracy shows the deviation of grading level from the designed level on the construction drawing for earthwork. The machine guidance system has been applied to a testing bed in a construction site. Data comparison analysis showed that the earth earthwork had 46.59% improvement in productivity as well as 46.96% improvement in accuracy, and is expected to provide a tool for applying smart constrction to the earthwork operation.

• Journal of Korean Society of Forest Science
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• v.111 no.4
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• pp.583-593
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• 2022

The harvesting system in South Korea faces the problems of aging workers and high wages, so it is necessary to improve the operation system and train workers to use high-performance forestry machines. This study compared the effectiveness and costs of yarding and processing operations between a multi-operation system using a tower yarder (HAM300) and a processor (KESLA 20SH) with those of a single-system using a forestry combi-machine. A whole-tree (cable) yarding operation was conducted in the clear-cutting area located at Compartment 15, Gwangneung Experimental Forest, National Institute of Forest Science, and the productivity and cost of multi- and single-system were analyzed. The productivity of the single-system was 1.5 m³/PMH and 1.6 m³/PMH higher than that of the multi- system because the single-system produced 1 log/cycle more than the multi-system in the yarding operation. The cost was approximately 12.1% lower for the single-system (￦36,113/m³) than for the multi-system (￦41,065/m³). The costs of the single-system and multi-system were decreased by maximums of 22.6% and 15.9%, respectively, by decreasing the idle time.

• Journal of Korean Society of Forest Science
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• v.112 no.2
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• pp.217-229
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• 2023

Forest projects often apply construction industry labor rates, without considering the demanding work conditions and labor intensity unique to forest operations, resulting in workplace issues. This study aims to analyze forest operations' characteristics and wage survey methods in other fields to establish a framework for surveying the wages of forest workers. The developed framework was tested through direct surveys conducted with all forest operation companies. Survey items included actual wages by occupation, identification and removal of outliers using quartile deviation, and occupation-based wage calculation. Results revealed that the appropriate wages for 2022 were as follows: KRW 163,376 for general workers, KRW 221,407 for special workers, KRW 250,045 for work leaders, and KRW 239,863 for wood cutters. These figures were 16.27% higher than those derived from the standard construction wage survey. The developed framework was validated by comparing the appropriate wages with both the standard construction wage survey and the forestry workers' wage. The results indicated that the wages calculated using the developed framework were 4.5% more similar to the forestry workers' wage compared with those from the standard construction wage survey. Consequently, the standard construction wage survey was deemed unsuitable for forest projects. To ensure efficient forest operations, it is imperative to conduct wage surveys using the developed framework over multiple years to accumulate sufficient data.

• The Journal of Korean Academy of Sensory Integration
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• v.22 no.1
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• pp.54-68
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• 2024

Purpose : This study aimed to explore the clinical experiences of occupational therapists who have transitioned from adult to child occupational therapy to provide a basis for developing programs to facilitate rapid clinical adjustment for transitioning occupational therapists. Method : Telephone interviews and Colaizzi's phenomenological research method were employed. The interviewees were six occupational therapists with at least three years of clinical experience who had transitioned from hospital-based adult occupational therapy to sensory integration-focused children's occupational therapy. The interviews were recorded, transcribed, and analyzed with the participants' consent. Results : The analysis of the interview transcripts yielded 3 categories, 7 themes, and 17 meanings. The three categories were the challenges facing transitioning occupational therapists in clinical practice, the strengths gained from their post-transition clinical experiences, and the facilitators needed before the transition to ensure quick clinical adjustment. Conclusion : Training and institutional arrangements must be in place to ensure that adult occupational therapists transitioning to sensory integration-focused child occupational therapy can quickly adapt clinically and professionally to their new environments.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2018.11a
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• pp.261-262
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• 2018

The tasks of Vessel Traffic Services are classified according to the content of the information provided. Since the establishment of the first Vessel Traffic Service center in 1993 at Phohang harbour, it has been steadily developed and its work domain and scope have been expanded. In this paper, the importance and workload of Vessel Traffic Service operators were analyzed according to classification of the tasks. In order to measure the importance and workload, questionnaires were conducted for the operators nationwide, and conclusions were drawn using the multi-criteria decision making process. The relationship between the importance of tasks and the workload might be used as the weights for setting the service areas in the future. Furthermore, it is expected to be used as the data of changable sector operation based on the relationship between importance and workload.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.10 no.9
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• pp.2471-2477
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• 2009

The purpose of this study was to analyze dental technician's job environment and job stress level and to examine its correlation. 180 dental technicians in Seoul, Incheon, and Chungnam area were selected. Survey was carried out from April 6, 2009 to May 20, 2009 by using self-administered questionnaire. The following are the analytical results in the collected data. 1. As a result of analyzing the research subjects' working environment level, there was significant difference in the item of health(P<0.05). The average in the working environment was indicated to be high with 1.53. 2. As a result of analyzing the research subjects' job-stress causing level, there was no significant item in all the variables. The average of job stress was indicated to be high with 3.44. 3. As for correlation between working environment and job stress, most of variables were indicated to have reverse correlation, thereby having been shown that the worse working environment leads to the more job stress.