• Journal of the Korea Institute of Building Construction
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• v.21 no.5
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• pp.469-481
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• 2021

Under Korean law, small-to-medium-sized construction projects with budgets of more than 100 million won and less than 12 billion won must receive technical guidance by a visiting technician belonging to a specialized institution. This study proposed a method for calculating the technical guidance fee to prevent the potential inadequacy of technical guidance when the responsibility providing the technical guidance fee is changed from a contractor to a client. The method simplified the construction works which should receive technical guidance into four sections according to the construction amount. For each section, the number of instances of technical guidance per day provided by the visiting technician and the minimum technical grade of the visiting technician were limited, and the guideline for estimating engineering services fees was applied to calculate the fee per instance of technical guidance. The results show that the proposed method can be applied to the establishment of a technical guidance fee guideline since it well reflects the current fee distribution and K2B analysis results.

• Journal of the Korea Safety Management & Science
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• v.18 no.2
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• pp.19-27
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• 2016

Safety accident rate of small-medium construction site is high. because of lack of safety management system, lack of safety management capacity, lack of investment for safety, Owner's insufficient awareness about safety. In order to improve this, Currently in Occupational Safety and Health Act, Construction site of amounts more than 300 million won less than 120 billion (architectural),150 billion won(civil) mandatory subject to the technical guidance on construction accident prevention. Context of construction accident causes with construction accident rate relationship analysis and case analysis of technical guidance, through a survey of stakeholders in the technical guidance drawn the problems of the construction accident prevention technical guidance system and ways to improve on this.

• Journal of the Korea Safety Management & Science
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• v.18 no.4
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• pp.47-55
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• 2016

Recently, industrial accidents rate has been gradually decreasing due to the development of safety management methods, but until now, the accident rate in the construction sector is higher than other industries. Large-scale construction sites are operating systematic safety systems to reduce industrial accidents. However, small and medium sized construction sites do not have systematic safety system and lack safety management ability, so that disaster is not reduced compared with large scale construction site. As a result, disaster prevention technology instruction system has been implemented to reduce the disasters of small and medium scale construction sites. However, in the case of a small construction site less than 2 billion won, there is little decrease in the accident rate, and in some cases, the accident rate increases. After the technical guidance system has been implemented, it is necessary to identify the performance and problems of implementation and to improve its effectiveness. In this study, we suggest the improvement plan to improve the efficiency of the technical guidance system by analyzing the problems and actual conditions of technical guidance operation in small and medium sized construction work sites.

• Korean Journal of Construction Engineering and Management
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• v.19 no.6
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• pp.79-85
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• 2018

The government and of the Safety and Health Corporation have continuously carried out safety activities such as supervision, inspection, technical guidance and financial support in order to reduce accidents on the construction site. However, the number of disasters on the construction site is increasing every year, Which accounts for more than 80% of the total number of casualties. It is necessary to investigate the implementation status of safety and health management in the field of small-size construction site, and to provide the appropriate technical guidance plan to the relevant work places. Also, it is necessary to reduce the disaster at the small-size construction site, The purpose of this study is Improvement Plan to Enhancing the Effectiveness of Technical Guidance Project for Safety Control of Small Construction Site.

• Journal of the Korea Institute of Military Science and Technology
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• v.5 no.1
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• pp.96-106
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• 2002

Many modern guided weapon systems employ sophisticated target sensors as well as powerful computing systems. Due to such advanced features, they are required to achieve better guidance accuracy, and at the same time other guidance objectives for better weapon effectiveness and survivability. In this paper, we overview some of the technical considerations in such advanced guidance algorithm development, and briefly look at some related research works. More specifically, we discuss impact angle control, time-varying nature of the guidance system, time-to-go estimation, guidance loop stability, effect of autopilot lag and physical limitations in control variables, parasitic paths in guidance loops, etc. We also briefly look at some advanced concepts such as integrated guidance and control loop design, target adaptive guidance, guidance law development based on dual control concept, and terminal evasive maneuver.

• 대한공업교육학회지
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• v.40 no.2
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• pp.22-43
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• 2015

The purpose of this study was to analyze students' expectation for specialized subjects teacher's role of technical high school. The study was carried out through questionnaire survey method. A survey questionnaire was developed by researcher to collect the information needed for the study. It consists of 15 items. 428 questionnaires were used for analysis. A chi squared test was used for data analysis. Major findings of this study were as follows: First, when specialized subjects teachers lecture major theory subject classes, students of technical high school wanted it to be according to their level. Their practical class preference differed depending on their department. For the security guidance method during practical class, students most wanted teachers constantly instructing in class. Second, students of technical high school wanted their teachers to pay attention to personality guidance during student life guidance & counseling time. They hoped that teachers would not discriminate towards wrong doings. Also students wanted career the most as a counseling topic and expected a guidance role from teachers. Third, students of technical high school wanted teachers to work hard to create a harmonious class atmosphere when managing a class. They wanted teachers to have affection for class and students. They wanted teachers making jokes easily with students to get friendly. Fourth, students of technical high school hoped 'employment and entrance higher grade school' the most as a career guidance topic. They wanted teachers to consider their aptitude when they were counseling about finding a job and wanted to learn more about job information during employment instructions.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2018.05a
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• pp.116-117
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• 2018

The government and the Korea Occupational safety & Health Agency have continuously carried out safety activities such as supervision, inspection, technical guidance and financial support in order to reduce safety accidents at the construction site. However, the number of disasters at construction sites is increasing every year. So analyze the results of the supervision and inspection of the Ministry of Employment and Labor, the projects related to the small-scale construction work of the Safety and Health Corporation, and the technical guidance project of the disaster prevention technology guidance organization. It is also necessary to establish an improvement plan for the disaster reduction of the small-scale construction work site for this project.

• Journal of the Korean Society of Safety
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• v.29 no.5
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• pp.104-109
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• 2014

More than 76% of occupational accidents occur in small and medium sized enterprises(SME) employing less than 50 workers, due to the lack of safety and health systems, and carelessness of workers and owners. Timely Technical Guidance(TTG) project of Korea Occupational Safety & Heath Agency(KOSHA) for SME was initiated to analyze and inform accident causes just after accidents occur. Improvement direction of TTG project is suggested through situation and performance analysis on TTG services conducted in 2012. KOSHA provided TTS services on 15,571 SMEs(suffering at least one accident in 2012), through which the working day losses from recurrence resulted in 19.0%p, 14.5%p and 31.3%p decreases in manufacturing, services and construction businesses, respectively.

• Journal of the Korea Safety Management & Science
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• v.16 no.3
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• pp.443-450
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• 2014

The industrial accident rate has been steadily decreased by making all efforts for the prevention of accidents after enacting Occupational Health and Safety Act in 1981. However, ordinary typed industrial accidents still occur in small and medium sized enterprises(SME). Timely Technical Guidance(TTG) project of Korea Occupational Safety & Heath Agency(KOSHA) for SME's was initiated to visit and provide the analysis and control of industrial accidents by the staffs of KOSHA as soon as possible after accidents occurred. This study is conducted to analyze the questionnaire survey for employers, workers and TTG personnel of KOSHA with being evaluated positively whether the demonstration project of TTG has been executed consistently. However, it is suggested that the understanding of TTG project and legal support are necessary for the establishments, and the development of a variety data and lots of available contents is necessary to increase satisfaction of the TTG project. The accident rate of SME's which are employed less than 50 workers is expected to be largely decreased with applying the control and improvement over this study with maintaining and developing TTG technology.

• Asian Pacific Journal of Cancer Prevention
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• v.16 no.17
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• pp.7897-7903
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• 2015

Background: To explored the value of 3D C-arm CT (CACT) guidance system in performing radiofrequency ablation (RFA) following transarterial chemoembolizationon (TACE) for hepatocellular carcinomas. Materials and Methods: RFA of hepatocellular carcinomas (HCC) were performed on 15 patients (21 lesions) with the assistance of CACT guidance system. Technical success, procedure time, complications and patient radiation exposure were investigated. The puncture performance level was evaluated on a five-point scale (5-1: excellent-poor). Complete ablation rate was evaluated after two months follow-up using enhanced CT scans. Results: The technical success rate of RFA procedure under CACT navigation system was 100 %. Mean total procedure time was $24.24{\pm}6.53min$, resulting in a mean effective exposure dose of $15.4{\pm}5.1mSv$. The mean puncture performance level rated for CACT guided RFA procedure was $4.87{\pm}0.35$. Complete ablation (CA) was achieved in 20 (95.2%) of the treated 21 tumors after the first RFA session. None of patients developed intra-procedural complications. Conclusions: 3D CACT guidance system enables reliable and efficient needle positioning by providing real-time intraoperative guidance for performing RFA on HCCs.