• 대한지구과학교육학회지
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• 제5권3호
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• pp.267-275
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• 2012

The purpose of this study is to find out the effect of the role-playing analogy activity-based class on the academic achievement in science and the science process skills of elementary school students. One experimental group and one control group of 4th grade students were selected to perform a prior investigation on the academic achievement in science and the science process skill. Then the experimental group attended science lessons that were based on the role-playing analogy activity and the control group attended the traditional science lessons based on the text book and teacher's guide. After conducting lessons, a post investigation was performed for each group and the results were analyzed to produce the following conclusions. First, the role-playing analogy activity class was more effective to improve students' academic achievements than the traditional science class. And the role-playing analogy activity class was more effective to learners in the high-level group, which made a scores above the average in prior investigation on the academic achievement, whereas it was little effective to those in the low-level group. Second, the role-playing analogy activity class was effective to enhance students' science process skills than the traditional science class. And the role-playing analogy activity class was more effective to the learners' in the high-level group than those in the low-level group.

• 연구논문집
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• 통권31호
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• pp.23-43
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• 2001

An experimental investigation on the reduction of nitrogen oxide emission from swirling, turbulent diffusion flames was conducted using multi air staged combustor, The combustor utilizes swirler to dampen fuel/air mixing, allowing an extended residence time for fuel pyrolysis and fuel-N conversion chemistry in an locally fuel-rich environment prior to burnout. This process also allow to reduce thermal NOx formation to lessen the temperature of reaction zone. The aerodynamic process therefore emulates the conventional staged combustion process, but without the need for the physically separate fuel-rich and -lean stages. Parametric studies on the ratios of each staged air and droplet size were carried out the feasibility of fuel/air mixing for low NOx combustion with diesel and pyridine mixed diesel fuel oil.

• 한국안전학회지
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• 제36권2호
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• pp.58-67
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• 2021

Incident investigation is regarded as a means to improve safety performance. For the prevention of industrial accidents, measures such as providing safety education, enhancing management interest and participation, establishing a safety management system, and conducting inspection of the work site are necessary. In particular, accident investigation activities, which are an important element of safety management, help to prevent similar accidents, thereby minimizing damage and enhancing work safety. They are critical for understanding business-related incidents and the vulnerabilities and opportunities associated with them. Therefore, it is clear that accident investigation activities are important for accident prevention. The primary focus of many incident investigation processes is on identifying the cause of an event. While considerable research has been conducted on potential accident investigation tools there has been little research on including the views and experiences of practitioners in the accident investigation process. In this study, a questionnaire survey was conducted among safety managers in the domestic manufacturing/construction industry to understand the practice of accident investigation. The investigation pertained to companies' accident investigation systems, the competence of investigators, and the identification and recommendations of the cause of accidents. From the analysis results of accident investigations, investigators' competence, the difficulty level of investigations, and the root causes of accidents were identified from the viewpoint of the participants of the accident investigations. In particular, the development of standardized and simple accident investigation methods and their dissemination to companies were found to be necessary for activating the root cause of accidents. Based on this, it can be used as basic data for the development of root cause analysis investigation techniques that are easily applicable to organizations.

• 대한지구과학교육학회지
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• 제4권2호
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• pp.116-125
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• 2011

The purpose of this study is to make a Result analysis on the Free Inquiry Method of Elementary school student. Also, this study investigates how free inquiry activities effect the science creative problem solving ability and science process skills of Elementary school student. For this study 150, third year, elementary School students from Busan City were selected. The Inquiry examined the effectiveness of each of the following free inquiry methods: the Program Based Learning method, the Project method, the Independent Investigation Method, the Small Group Inquiry Method, and the Science Notebooks Method. The students were divided into groups in which they incorporated the respective methods into their practice. Test showed the following results: First, the Science Notebooks Method activities proved to be much more effective than the Program Based Learning method, the Project method, the Independent Investigation Method, the Small Group Inquiry Method, and the Science Notebooks Method in terms of developing on science creative problem solving ability. Second, the Project method activities proved to be much more effective than the Program Based Learning method, the Independent Investigation Method, the Small Group Inquiry Method, the Science Notebooks Method in terms of developing on science process skills.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2011년도 춘계학술대회 논문집
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• pp.200-207
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• 2011

The research which sees accomplishes the capital region high-speed railway and examines investigates about process of railroad construction project and an advance service contents from to understand a progress process, change process and technical investigation of basic design and the execution plan at the time of route led and accomplishes the plan which is detailed the process which in the center researched. Also plan start method and application plan, clear the security of the plan air which is proper is necessary and dividing which design phase is, plan process construction etc. improvements sacrifice froze.

• 한국실내디자인학회논문집
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• 제27권1호
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• pp.140-155
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• 2018

In response to the development of IT technology in the 21st century and the advancement of the public human rights consciousness, it has become necessary to continuously evolve the office environments to support the changes of organizational structure and work methods of the police investigation departments. As a facility standard, continuous researches on standardized design space models and guidelines of the police investigation departments are needed. In respond to the organizational changes for the convenience of the working police investigators and the protection of the human rights of the visiting public, the environmental improvement projects for the office of the investigation department of the police stations are going on since 2014. In this study, analyzation and verification of the 3 cases of pilot projects for the improvement of police investigation departments would be done, based on the policy research project in 2014: 'the standard design direction of police officers for the protection of human rights and benefit of police investigation process.' The purpose of this study is, first of all, the actual situation survey for presenting the standard design space model and guidelines of investigation department of the police department. Secondly, the validation of the spatial model adequacy for for the past 3 years' case study of the police investigation department's environmental improvements by the application of standardized design space models and guidelines. The result of this study would be to enable the more effective police department investigation environment improvement policy by presenting the standard design space models and guidelines of the investigation departments of the police facilities.

• 한국연소학회:학술대회논문집
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• 한국연소학회 2000년도 제20회 KOSCO SYMPOSIUM 논문집
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• pp.76-84
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• 2000

A numerical study was conducted for the investigation of thermal choking process in a model scramjet engine based on the experimental results at the Australian National University. The results of numerical simulation showed that thermal choking process could be related to the interaction between hypersonic flow and fuel-air mixing process. Especially, we could make sure that turbulent mixing was most important parameter to the thermal choking process.

• 대한안전경영과학회:학술대회논문집
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• 대한안전경영과학회 2012년 춘계학술대회
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• pp.547-559
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• 2012

This thesis introduced a model of diagnosing a company's quality management, and a process of achieving quality innovation based on the model. As for study methods, books and theses related to quality and process innovation were collected for investigation, a survey on internal employees to investigate major issues of quality and standard consciousness was conducted, and 5DP was discussed for balanced process analysis.

• 복식문화학회:학술대회논문집
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• 복식문화학회 2006년도 Seoul The Costume Culture Association & Ars Textrina Joint International Conference
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• pp.60-62
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• 2006

• 천문학회보
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• 제28권2호
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• pp.95-95
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• 2003