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Consideration of Mathematics Education's Problem in Vocational High School - The Case of Students in Commercial High School - (실업계(實業界) 고등학교(高等學校)에서 수학교육(數學敎育)의 문제점(問題點)에 대한 고찰(考察) - 상업계(商業界) 고등학교(高等學校) 학생(學生)을 대상(對象)으로 -)

  • Cho Bong-Sik;Lee Jung-Ha
    • Journal for History of Mathematics
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    • v.19 no.3
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    • pp.147-156
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    • 2006
  • The purposes of this study are that understand vocational high school student's scholastic ability, dream and conception about mathematics exactly and that we find a educational mathematics program suitable to vocational high school student. Through this improvement of the curriculum in vocational high school, we will find the way that increase efficiency.

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The Study for Rolling Stock System Design of Ho-Nam High Speed Railroad of Korea (호남고속철도 차량 시스템 설계에 관한 연구)

  • 박광복
    • Proceedings of the KSR Conference
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    • 2001.10a
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    • pp.358-369
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    • 2001
  • KTX will be operated on Kyun-Pu High Speed Railroad Line around end of 2,003 and KHST(G7 Korea High Speed Train) will be carried out the development running test at Kyun-Pu High Speed Railroad Line from middle of 2002. By the way, the conventional Ho-Nam railroad line was passed the limit capacity of transportation at some area from 1997. For solving of this matter, Ho-Nam railroad line need new high speed railroad line for high transportation capacity of passengers now. This report was studied about the rolling stock system design used new technology of KHST and KTX for Ho-Nam High Speed Railroad.

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The Methods and Its Application of Long Distance Trail Planning in a Mountainous Region (산악지역에서의 장거리 트레일 조성 계획방법 및 적용)

  • Hwang, Guk-Woong;Jang, Byoung-Kwan
    • Journal of Korean Society of Rural Planning
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    • v.17 no.3
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    • pp.55-65
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    • 2011
  • Long distance trail or trail system planning is the first important step in transforming your vision into reality. Planning presents a vision for a trail or trail system and brings a comprehensive, long-range perspective. The master plan provides solid, credible recommendations for developing a trail or trail system that is safe, convenient, well used, supported by local residents, practicality to implement, and customized to meet the needs of the community, you will need to follow a logical planning. The key elements of master planning includes site assessment, vision, goals and objectives, routing and design, implementation strategies. Trails or trail systems should provide linkages to popular destinations, safely accommodate a variety of users, and be sensitive to any negative impacts on the natural environment and wildlife. Trails planners also need to think about how the trail, or trail system will function in the future as areas are developed or trail population increases. All of these factors during the planning process will ensure the existence of high-quality facilities for years to come. Project for Nakdong-jungmaek trail planning combine long distance trail with circuit way. That project is a planning brought out the best in each of Tokai natural way and Cotswold way. That is planning which is combined a wooded trail in Tokai natural way with access and facilities improving economy in Cotswold way. Also That planning embraces a core cultural center which is concerned forest or wood to come more people.

Study on Transient Analysis of Hot Gas Valve with Pintle (핀틀이 적용된 고온 가스 밸브의 비정상상태 해석 기법에 관한 연구)

  • Lee, Kyungwook;Heo, Seonuk;Kwon, Sejin;Lee, Jongkwang
    • Journal of the Korean Society of Propulsion Engineers
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    • v.22 no.2
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    • pp.152-159
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    • 2018
  • A numerical simulation was conducted to establish the analysis methods of the unsteady conjugated heat transfer with a hot gas valve. Two methods are proposed to reduce the computational cost and analysis time of the unsteady conjugate heat transfer; namely, the multi-section analysis method and the one-way analysis method. The multi-section analysis method exhibits relatively high reliability. In the one-way analysis method, the unsteady conjugate heat transfer from the fluid domain to the solid domain was simulated from the analysis results of the steady-state flowfield. The incipient accuracy of the analysis results obtained by the one-way analysis method was slightly lower than that of the results obtained by the multi-section analysis method. However, the discrepancy became smaller with time, as the analysis progressed.

Ancient Chinese Food Culture Reflected in Chinese Characters -Focusing on Cooking Methods and Utensils (한자에 반영된 고대 중국의 음식문화-요리 방법과 도구를 중심으로)

  • 박흥수;제윤지
    • Journal of Sinology and China Studies
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    • v.74
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    • pp.53-77
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    • 2018
  • The purpose of this paper is to study the shape and meaning of the 15 Chinese characters reflected by the ancient Chinese cooking methods and utensils, and to understand their cultural implications. In Chapter 2, the characters 炮, 炙, 蒸, 煮 were analyzed. Both 炮 and 炙 symbolize the way meat is roasted on fire, but their difference is the specific way of cooking, 炮 was used to describe a way to bake hairy animals with daubed with mud. 蒸 was used to describe a way to cook food with water vapor that is generated when heat is applied to the water. This was not a frequently used recipe in the early days because it required a lot of effort. 煮 was used to portray a way to boil food by adding water, and is shaped like a figure of a pottery put in fire. In Chapter 3, the characters 鼎, 鬲, 鑊, 甑, 俎, which are related to cooking utensils, and 簋, 豆, 爵, 斝, 卣, 壺, which related to tableware, were analyzed, 鼎 was not only used as a cooking utensil, but was also a sign of status and political functioning. 鬲, 鑊 had meanings of "sot," or iron pot, but 鬲 had bent legs, while 鑊 had no legs. From the combination of the character 曾 and the radical 瓦, there is a high possibility that 甑 was a steamer, likely made by ceramics. 俎 was used to imply a cutting board and utensils used in ancestral rites to offer animals in ancient china. 簋 and 豆 meant circular dishes, and were utensils used in ancestral rites in ancient China. 爵 meant a liquor glass shaped like sparrow beak. Because 爵 looked like a sparrow, 爵 was used as 雀 in Song dynasty. 斝 meant a liquor glass that was cast in jade and had two poles. 卣 meant a liquor barrel with a round shape, 壺 had the meaning of a jar, but in ancient China, it meant a bowl for food.

A Dynamic Analysis of Wheel Forces distribution of KTX locomotive for Interaction of PSC box Girder Bridge (PSC 박스거더 교량의 상호작용에 의한 KTX 동력차의 윤하중 분포 해석)

  • Oh, Soon-Taek;Lee, Dong-Jun;Sim, Young-Woo;Yun, Jun-Kwan;Kim, Han-Su
    • Proceedings of the KSR Conference
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    • 2011.05a
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    • pp.680-689
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    • 2011
  • A dynamic analysis procedure is developed to provide a comprehensive estimation of the dynamic response spectrum for locomotive's wheels running over a Pre-Stressed Concrete (PSC) box girder bridge on the Korea high speed railway. The wheel force spectrum with the bridge behavior are analyzed as the dynamic procedure for various running speeds (50~450km/h). The high-speed railway locomotive (KTX) is used as 38-degree of freedom system. Three displacements(vertical, lateral, and longitudinal) and three rotational components (pitching, rolling, and yawing). For one car-body and two bogies as well as five movements except pitching rotation components for four wheel axes forces are considered in the 38-degree of freedom model. Three dimensional frame element is used to model of the PSC box girder bridges, simply supported span length of 40m. The irregulation of rail-way is derived using the exponential spectrum density function under assumption of twelve level tracks conditions based on the normal probability procedure. The dynamic responses of bridge passing through the railway locomotive with high-speed analyzed by Newmark-${\beta}$ method and Runge-Kutta method are compared and contrasted considering the developed models of bridge, track and locomotive comprehensively. The dynamic analyses of wheel forces by Runge-Kutta method which are able to analyze the forces with high frequency running on the bridge and ground rail-way are conducted. Additionally, wheel forces spectrum and three rotational components of vehicle body for three typical running speeds is also presented.

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A Study on the Relationship between Mathematics and Major Subjects of Technical High School. - Focused on the Electronic subjects - (공업계 고등학교 수학교과와 전문교과간의 연계성에 관하여 - 전자과를 중심으로 -)

  • 조선기
    • Journal of the Korean School Mathematics Society
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    • v.5 no.1
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    • pp.135-145
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    • 2002
  • Technical high school aims at educating students to acquire fundamental skill and technology required for being competent technicians, to be creative in adjusting themselves to the changing industrial society, and to do self-realization and find their ways toward the future on their own. To attain that goal and maximize learning effect, mathematics education is very important as prerequisite learning for technical subjects, as most technical courses in technical high school are basically based on mathematics. The purpose of this study was to discuss how mathematics education could be successfully linked to technical courses in an attempt to make it function properly as prerequisite learning for major subjects and facilitate students' technical learning. For that purpose, what problems the mathematics components of major subjects and the curriculum had was examined and the way to offer better education was presented. And there are some suggestions regarding mathematics education: First, technical mathematics should be newly inserted into technical high school curricula to help students learn major subjects in more efficient way. Second, most technical high schools are expected to just require tenth graders to complete a 10-stage mathematics course. In that case, they might find difficulties in learning major subjects when they are in their 11st and 12th grade. The curriculum should be designed to have 11st and 12th graders take mathematics education. Third, many students find a job after graduation, but the growing number of students go on to university to receive more education in the same field. Accordingly, there is a need to enlarge continuous progress plan, rather than completion-type one, to make students well-grounded technically. And mathematics should be taught in more classes as prerequisite subject for major courses. Fourth, mathematics elements necessary for each major subject should be outlined and announced to schools so that they could reorganize mathematics and major courses appropriately.

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Design and Implementation of CAl Title for Learning Basics of AC Electricity (공업계 고등학교 전기이론 교과의 교류의 기본성질 단원에 관한 CAI 교재 설계 및 구현)

  • Kim, Jong-Seong;Kwon, Myoung-Ha
    • The Journal of Korean Association of Computer Education
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    • v.4 no.1
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    • pp.127-134
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    • 2001
  • Many teachers at vocational high schools have had difficulties overcoming the gap between what students know and what students have to achieve in many topics. Mathematics is toughest of all, since most of textbooks in electronics are assuming student's basic knowledge in math. Considering that many students with very low achievements are entering vocational high schools, reality is far from such assumption. Inevitably, we have to face two difficult questions; do we have enough time to teach these kids all the math that they need in two years? If not, what alternatives we should adopt? We just do not have enough time and therefore find out a way to cope with harsh reality. According to our preliminary study, we suggest that multimedia-based CAI may be the best way to attack this problem. From hardware point of view, fortunately, many of vocational high schools are reasonably equipped for multimedia-based education. However there have been hardly any effort to develop courseware for vocational education in Korea. In this paper, a CAI title for learning basic characteristics of alternating current has been designed and implemented. The developed multimedia-based CAI title has been applied with respect to first grade students at local vocational high schools. A survey after classes shows that CAI could help student feel much comfortable with Basic Electricity course and grasp physical understanding much easily. Accordingly we conclude that classes adopting CAI would be of great help to put education in vocational high schools on the right track.

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Science Gifted/Talented Education System in KOREA (과학영재 교육체제 구축방안에 관한 연구)

  • 강호감;김명환;이상천;하종덕
    • Journal of Gifted/Talented Education
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    • v.12 no.1
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    • pp.61-76
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    • 2002
  • The purpose of this study is to investigate the education system for science 34gifted/talented students in Korea. There are fifteen science gifted/talented education centers established in major universities, sixteen science high schools and one research center for the gifted education in science located at KAIST. To examine the selection procedure and the curriculum of the education centers and science high schools, the annual reports of the fifteen education centers and the annual plans of sixteen science high schools are analyzed. About 200 gifted/talented students are employed in the field of science, mathematics and information science at each education center, Multidimentional education system is developed for efficient way of teaching for the gifted. The curriculum and teaching method for each education center is unique and different from the science high schools that follow nationally given form. This study shows new selection method and unique curriculum for the science gifted/talented students employed in the education centers. Also, current situation of science high schools are reported in this study. Finally we suggest the systematic way of developing the education system for the gifted in science in korea.

Designation for Change Detection of Building Objects in Urban Area in High-Resolution Satellite Image (고정밀 위성영상에서 도심지역 건물변화 탐지를 위한 중첩방법)

  • 이승희;박성모;이준환;김준철
    • Korean Journal of Remote Sensing
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    • v.19 no.4
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    • pp.319-328
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    • 2003
  • The automatic analysis of high-resolution satellite image is important in cartography, surveillance, exploiting resources etc. However, the automatic analysis of high resolution satellite image in the urban area has lots of difficulty including a shadow, the difference of illumination with time, the complexity of image so that the present techniques are seemed to be impossible to resolve. This paper proposes a new way of change detection of building objects in urban area, in which the objects in digital vector map are designated and superimposed on the the high-resolution satellite image. The proposed way makes the buildings on the vector map parameterize, and searches them in the preprocessed high-resolution satellite image by using generalized Hough transform. The designated building objects are overlaid on the satellite image and the result can help to search the changes in building objects rapidly.