• 한국항공운항학회:학술대회논문집
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• 2015.11a
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• pp.257-260
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• 2015

국적기의 사고 및 국내에서 발생한 사고를 분석해보면 많은 인명 피해가 발생된 사고의 유형들을 접할 수 있다. 운항중인 항공기에 특별한 결함이 없었음에도 불구하고 조종사의 잘못된 판단에 의한 사고는 선행연구들의 결과와 같이 많은 부분들을 차지하고 있다. 특히 비 정밀접근(Non Precision Approach)의 선회접근(Circling Approach) 및 시계접근(Visual Approach)절차에서 자주 발생되는 지상충돌 사례들을 과학적이고 객관적인 방법을 바탕으로 분석하여 유사사고 재발 방지를 위한 대안을 찾고자 한다. 이를 위해 조종사의 입장에서의 교육 및 절차에 관해 분석하여 비 정밀 접근 절차 수행의 기준을 제언하고자 한다.

• 정보보호뉴스
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• s.124
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• pp.12-18
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• 2008

지난 2008년 1월초 KISA 인터넷침해사고대응지원센터가 '2007년 침해사고 동향 및 2008년 전망'에 대한 분석보고서를 내놓았다. 침해사고에 대한 축적된 사고사례들을 토대로 분석된 침해사고 동향과 전망이라는 점에서 이번 보고서는 다가올 위협에 대비해야 하는 정보보호 관계자에게는 유용한 참고자료가 될 것이다. 2007년 한해 우리 IT 환경을 괴롭혔던 침해사고 유형은 무엇이었고, 향후 우리가 대비해야 할 문제들은 무엇인지 주요 요소들을 중심으로 살펴보고자 한다.

• Journal of the Korean Chemical Society
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• v.62 no.4
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• pp.288-298
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• 2018

In this study, we surveyed pre- and post-perceptions of fourteen science teachers related to the atmosphere composition of molecules with different masses by the developed test. As a result of the test, the teachers were classified into two types of thoughts; One of them is considered the atmosphere to be a homogeneous solution, and the other is a thought that the composition ratio of the atmosphere was not homogeneous considering the different weights of particles. The two types were reclassified into three categories; one of them is considering large gravity effect, another is considering small gravity effect, and the other is considering medium scale gravity effect. Total six types of thoughts were found from the pre-test. After introducing crosscutting concepts which are related to the composition of atmosphere. The teachers discussed the phenomena with the molecular motion by weights of atoms and temperature, the homogeneity of the solution of air in chemistry domain. They also discussed with the relationship between mass and gravity and distance in physics domain. And the discussion included distribution of the atmosphere, convection phenomena, etc. After the discussion, the teachers changed their pre-conceptions to post-concoctions considering combined perspectives of gravity, mass, temperature, altitude etc. Through these changes, we are able to confirm the importance of crosscutting concepts covered in various disciplines. In the integrated science, we should help teachers to provide students with these types of thinking in order to form a coherent world-view and to carry out inquiry thinking as an intellectual tool.

• Korean Journal of Construction Engineering and Management
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• v.22 no.5
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• pp.73-85
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• 2021

This study proposes an efficient management direction for Korean construction accident cases through a deep learning-based text data classification model. A deep learning model was developed, which categorizes five categories of construction accidents: fall, electric shock, flying object, collapse, and narrowness, which are representative accident types of KOSHA. After initial model tests, the classification accuracy of fall disasters was relatively high, while other types were classified as fall disasters. Through these results, it was analyzed that 1) specific accident-causing behavior, 2) similar sentence structure, and 3) complex accidents corresponding to multiple types affect the results. Two accuracy improvement experiments were then conducted: 1) reclassification, 2) elimination. As a result, the classification performance improved with 185.7% when eliminating complex accidents. Through this, the multicollinearity of complex accidents, including the contents of multiple accident types, was resolved. In conclusion, this study suggests the necessity to independently manage complex accidents while preparing a system to describe the situation of future accidents in detail.

• Fire Science and Engineering
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• v.33 no.6
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• pp.72-79
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• 2019

Through this study, we developed a model for predicting chemical accidents lead to casualties. The model was derived from the logistic regression analysis model and applied to the variables affecting the accident. The accident data used in the model was analyzed by studying the statistics of past chemical accidents, and applying independent variables that were statistically significant through data analysis, such as the type of accident, cause, place of occurrence, status of casualties, and type of chemical accident that caused the casualties. A significance of p < 0.05 was applied. The model developed in this study is meaningful for the prevention of casualties caused by chemical accidents and the establishment of safety systems in the workplace. The analysis using the model found that the most influential factor in the occurrence of casualty in accidents was chemical explosions. Therefore, there is an urgent need to prepare countermeasures to prevent chemical accidents, specifically explosions, from occurring in the workplace.

• Journal of Korean Society of Transportation
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• v.23 no.1
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• pp.9-20
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• 2005

Accident type and/or factor identification is important in accident reduction planning. The aim of this paper is to apply the hierarchical approach with binomial distribution and logistic regression analysis to find out types and factors, respectively. Based on 2001 Suwon city black spot data, a binomial distribution modeling approach has been applied to diagnose the black spots, with the help of safety performance modeling approach has been applied to diagnose the black spots, with the help of safety performance function. Then, the logistic regression analysis has been employed to identify the critical factors. Some accident remedies are also reviewed in the light of the model outcomes. The proposed research framework sheds light on a different accident related research and can also be successfully applied to similar studies and sites.

• Journal of Elementary Mathematics Education in Korea
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• v.2 no.1
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• pp.15-22
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• 1998

Various methods have recently tried to improve elementary mathematics education. One of the common themes is how to activate learners' creative thinking and thus facilitate their learning activities in mathematics. This research attempts to find out what basic elements constitute students' creative thinking, based on psychological studies with regard to learners' thinking activities. Also, the research presents specific mathematics problems and questions which can be used as patterns for the activation and the formation of students' creative thinking in elementary mathematics education.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2001.05a
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• pp.77-78
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• 2001

선박으로부터 발생하는 해양사고는 귀중한 인명과 재산은 물론 사고 선박으로 부터 배출된 유류와 폐기물 등의 유해물질은 주변어장을 황폐화시킬 뿐만 아니라 해양생물을 멸종시키는 해양오염원이 되고 있다. 해상에서 발생하는 해양사고는 항행중 태풍이나 폭풍 등을 만나 선박이 침몰하거나 전복되는 불가항력적인 자연 재해와 선박의 구조와 설비 등의 선체 결함에 의한 요인도 있으나, 최근의 해양사고는 그 선박을 조종하고 관리하는 승무원의 항해 부주의나 직무태만, 항해정보의 부정확과 운항기술의 미숙등 인적과실에 의해 발생하는 선박해양사고가 대부분을 차지하고 있다. (중략)

• Journal of the Korean School Mathematics Society
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• v.6 no.1
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• pp.163-175
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• 2003

The research was aimed to find a special quality to the mathematical concept development using a graphing calculator in the collaborative learning. I could observe the process in which the students had formed the generalized and abstract mathematical concepts after they were given different concepts. I \ulcorner-Iso observed the characteristics of how they started with a vague syncretic conglomeration and approached to the complicated thoughts and genuine concepts. The advance of the collection type was achieved in the process of teacher's confirming of what the students had observed with a calculator. The language and the instrument were used in order for students to control the partial process. Also, they were given similar types of problems to make them clear when the students confronted 'the crisis of thoughts' at the level of pseudo-concept.

• Convergence Security Journal
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• v.16 no.4
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• pp.69-78
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• 2016

As the development as the IT society accelerates, the frequency of terrorism from malignant codes and other cyber crimes is increasing. Malignant codes show various forms of attack according to the intentions of the attacker, and leaves behind digital evidences, not analog evidences when damages occur. Digital forensic, the procedure of collecting and analyzing digital evidence is one of the main factors that must be carried out when damages from malignant codes arise. However, there are the difficulties of not being able to preserve the integrity and authenticity in the procedure of coping witht infringements, which must be maintained in the digital forensic procedure. To complement such problems, this paper suggests the method of applying forensic by identifying the malignant code infringement incidents according to the type of damages.