• Korean Journal of Cognitive Science
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• v.24 no.2
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• pp.173-201
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• 2013

This study aimed to investigate the differential effects of individual's cultural disposition (individualism-collectivism or horizontal-vertical thinking) and need for cognitive closure(NFC) on framing effects. For this purpose, the participants were divided into 4 different cultural disposition groups based on Singelis et al.'s[1] INDCOL scale, and 2 different NFC groups based on Lee's[2] NFC Scale, and then asked to respond on 5 decision making scenarios. The results can be summarized as followings. First, participants preferred risk-avoidant option in gain frame, whereas risk-seeking option in loss frame. Second, there are no difference of cultural disposition on framing effects, but high NFC group showed larger framing effects than low NFC group in loss frame. Third, collectivism and vertical thinking in high NFC condition showed larger framing effects than low NFC condition.

• Korean Journal of Construction Engineering and Management
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• v.2 no.2 s.6
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• pp.47-58
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• 2001

Of all the site logistics technologies in high-rise building construction, both vertical and horizontal move plan, are the most imperative factors. And the horizontal plan follows lift-up plan as of the vertical plan. However though it may be, temporary lifts on site are numbered by heuristic formulas. The quantity of finishing material cannot be converted into lift-up load per finishing material. The lift-up plan cannot be evaluated the feasibility for finishing material move plan by a reasonable evaluation methodology. The horizontal plan is far from the vertical one. And the information as an input data for the horizontal plan is devoid of package unit size, length, and volume per finishing material. These can hardly result in reasonable and detail decision on how much to use temporary lifts, how long to use these, and where to deposit each finishing material. Therefore, this study is to suggest a decision-making model that can integrate vertical and horizontal material move plan in high-rise building construction and make a decision the plans systematically. And the study is to explain the concept, methodology, and contents of the model applied to a virtual project, named as MT 130 (Millennium Tower 130). By the model, the planner can shift his/her thinking framework on site logistics management products-oriented Into process-oriented. He/she can manage a project by the framework as system thinking, evaluate the feasibility of a lift-up plan, and decide the horizontal plan integrated with the lift-up.

• Proceedings of the Korean Society of Computer Information Conference
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• 2018.07a
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• pp.283-284
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• 2018

최근 4차 산업 혁명의 시대가 시작되면서 IT, 사물 인터넷(IOT), 자율 주행 자동차, 드론 등 많은 분야에 있어서 일상생활의 편리함이 증가 하고 있는 추세이다. 하지만 긴박한 상황 시 사고 현장에 대한 빠른 출동 등과 같은 응급 상황에 필요한 분야의 개발은 제한적이다. 본 과제는 이러한 문제점들을 해결하기 위해 드론과 구급차를 결합하여 수직이착륙이 가능한 구급차를 제작할 것이다. 수직 이착륙이 가능한 구급차를 도입함으로써 도로 위 교통에 대한 문제점과 차로 이동이 어려운 환경에서 보다 빠르게 사고현장에 투입하여 인명 구조와 사고 현장을 수습하여 피해를 감소시키고자 한다.

• The Korean Society of Law and Medicine
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• v.5 no.2
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• pp.52-110
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• 2004

• Korean Journal of Cognitive Science
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• v.23 no.2
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• pp.269-293
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• 2012

This study aimed to investigate the interactive effects of individual's cultural disposition (individualism, collectivism, horizontal disposition and vertical disposition) and cognitive style (analytic vs. holistic thinking) combination on differences in global precedence. For this purpose, the participants were divided into 4 different cultural disposition groups based on Singelis et al.'s(1995) INDCOL scale, and 2 cognitive style groups based on Choi et al.'s(2007) AHS, and required to respond selectively to global or local property of two types of compound stimuli (compound figure and compound letter). Reaction time and error rates for both global or local property were analyzed and compared as the dependent measurement. The results can be summarized as followings. First, faster responses were observed in compound figure condition than in compound letter condition, and to global property than to local property. Second, contrasting to individualism-cognitive style or horizontal disposition-cognitive style combinations, significant interaction effects both between collectivism and cognitive style, and between vertical disposition and cognitive style on global/local processing were found. This result indicated that combinations of collectivism-holistic thinking and vertical disposition-holistic thinking can induced larger global precedence effect than other combinations of cultural disposition and cognitive style.

• Journal of Elementary Mathematics Education in Korea
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• v.20 no.3
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• pp.431-456
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• 2016

The purpose of this study is to investigate the appropriate time of introduction and the usage of the number line, in order to suggest the right point of learning the number concept to the elementary school students. For the efficient achievement of this purpose, we investigated the mathematical models for constructing the number concept such as number line, empty number line and double number line, counting and development of number concept. Then, we conducted case study on the time of introduction and the usage of the number line. Finally, we analyzed the result. First, there is need for adjustment to conduct the introduction of the number line from the second year of elementary school, so to help the students understand the continuing number concept through the understanding on the metaphorical concept of the number line. Second, there is the need of positive introduction and the use on the mathematical models; empty number line which helps to draw various thinking strategy visually through the process of operations such as addition and subtraction; the division into equal part and division by equal part in which multiplicative comparative situation or division takes place; the double number line which helps to understand the rate or proportional distribution. Finally, when adopting the number line, the empty number line, or the double number line, we suggested the necessity of learning about elaborate guidance and the usage in order to fully understand the metaphorical concept of the number line.

• Proceedings of the Korean Institute of Industrial Safety Conference
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• 2001.11a
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• pp.349.1-357
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• 2001

안전장치가 설치된 승강기는 1857년 Otis에 의해 개발되어 최근 건물의 고층화에 따른 사람들의 수직 및 수평 운송수단으로서 우리들의 일상적인 생활에 없어서는 안 될 시설임에도 불구하고 그 이용에 따른 안전사고가 발생하고 있다. 1993년부터 2000년까지 한국승강기안전관리원$^{1)}$ 에 따른 승강기 안전사고 발생현황은 총 승강기 설치대수에 대한 년 평균 재해발생율이 0.0414%로 총 안전사고 건수 143건에 대한 재해자가 180명이 발생하였으며, 그 중 승객용 승강기는 전체 재해의 약 42.6%를 차지하고, 180명의 재해자 중에서 중상 이상의 재해자가 약 80.1%를 차지하고 있다.(중략)

• Proceedings of the Korea Information Processing Society Conference
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• 2016.10a
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• pp.123-124
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• 2016

본 연구는 스마트폰 사용자가 응급상황에 처했을 때 사용자의 정확한 위치 정보를 응급 구조 센터에 전달할 수 있는 방법을 개발함에 목적을 둔다. 사고의 경우 실외 뿐만 아니라 실내에서 많은 사고가 발생하는데, 일반적으로 위치 정보를 획득에 사용되는 GPS 의 경우는 실내 위치를 정확하게 파악하기 어렵기 때문에 구조를 지연시키는 문제를 야기한다. 본 연구는 이러한 상황들을 방지하기 위해 GPS와 와이파이, 블루투스를 각각 이용한 삼각 측량법을 통해 실내의 위치정보를 측정하고 더 나아가 압력센서를 통해 사용자의 위치를 3차원적으로도 탐색한다. 실험 결과, GPS를 이용하는 것보다 블루투스를 이용하는 것이 더 정확한 실내 정보를 탐색하는 것을 알 수 있었다. 또한 압력계를 통해 고도를 측정함으로써 건물 내부에서 사용자의 수직적 위치를 측정할 수 있었다. 이러한 결과는 위도 경도의 정확한 정보와 함께 고도에 대한 예측을 가능하게 함으로써 보다 정확한 실내 위치 정보를 획득하여 골든 타임을 확보하는데 도움이 될 것으로 보인다.

• Tunnel and Underground Space
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• v.32 no.6
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• pp.451-463
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• 2022

Whenever a mineshaft accidentally collapses, speedy risk assessment is both required and crucial. But onsite safety diagnosis by humans is reportedly difficult considering the additional risk of collapse of the unstable mineshaft. Generally, drones equipped with high-speed lidar sensors can be used for such inspection. However, the drone technology is restrictively applicable at very shallow depth, failing in mineshafts with depths of hundreds of meters because of the limit of wireless communication and turbulence inside the mineshaft. In previous study, a three-dimensional (3D) scanning system with a single channel lidar was fabricated and operated using towed cable in a mineshaft to a depth of 200 m. The rotation and pendulum movement errors of the measuring unit were compensated for by applying the data of inertial measuring unit and comparing the similarity between the scan data of the adjacent depths (Kim et al., 2020). However, the errors grew with scan depth. In this paper, a multi-channel lidar sensor to obtain a continuous cross-sectional image of the mineshaft from a winch system pulled from bottom upward. In this new approach, within overlapped region viewed by the multi-channel lidar, rotation error was compensated for by comparing the similarity between the scan data at the same depth. The fabricated system was applied to scan 0-165 m depth of the mineshaft with 180 m depth. The reconstructed image was depicted in a 3D graph for interpretation.

• Education of Primary School Mathematics
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• v.21 no.2
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• pp.237-260
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• 2018

This study investigated the models of four countries' elementary mathematics textbooks in Ratio and Rate and identified how multiplicative perspectives on proportional relationships and the structure of proportion situations are reflected in the textbooks. For this, textbooks of 5th and 6th grade textbooks in Korea Japan, Singapore and U.S. are compared and analyzed. As a result, we can find multiplicative perspectives on proportional relationships and the structure of proportion situations on pictorial models, ratio tables, double number lines and double tape diagrams. Also, the development of Japanese textbooks from multiple batches perspectives to variable parts perspectives and the examples of the use with two models together implied the connection and union of two multiplicative perspectives. Based on these results, careful verification and discussion for the next textbook is needed to develop students' proportional reasoning and teach some effective reasoning strategies. And this study will provide the implication for what kinds of and how visual models are presented in the next textbook.