• 한국소음진동공학회:학술대회논문집
• /
• 한국소음진동공학회 2001년도 춘계학술대회논문집
• /
• pp.1022-1027
• /
• 2001

In this study, the train-induced vibration was measured at many locations at/around the actual service lines and the data base was constructed using the measurement results. The characteristics of train induced ground vibration was categorized and the empirical ground vibration estimating equations were developed. On the ground area (level grounds, embankments, cut sections), the vibration estimating equations were developed in terms of ground vibration level which was related with the distance from the source. Especially for the cut section areas, the vibration levels were expressed with the vibration receiving point expressed by the ratio of vertical distance to horizontal distance(V/H) from the source. As a result, when V/H is 0.96, the vibration estimating equation gives a minimum vibration level.

• 한국공간정보시스템학회 논문지
• /
• 제2권1호
• /
• pp.83-90
• /
• 2000

최근 인터넷의 발달로 GIS 관련 연구분야도 지금까지의 GIS 정보구축분야에서 구축된 정보에 대한 활용을 위한 정보유통분야로 관심이 집중되고 있다. 이에 본 논문에서는 GIS 유통구조에 대한 표준화동향을 살펴보고, 국내 GIS 분야에서 현재 사용되고 있는 데이터들을 분류하여 GIS 전문가 설문조사를 통하여 데이터별 보안요구를 조사하였다. 이를 바탕으로 현재 국내에서 진행중인 암호 및 인증을 위한 공개키기반 구축사업과 연계하여 GIS 정보의 안전한 전송과 접근제어를 위한 보안방안을 제시한다.

• 원예과학기술지
• /
• 제31권1호
• /
• pp.103-109
• /
• 2013

Estimating the high tuber solids needs a simulation system on potato growth, and its development should be obtained by using agricultural elements which analyze the relationship between crop growth and agricultural factors. An accurate simulation to predict solids level against climatic change employs a calculation of in vivo energy consumption and bias for growth and induction shape in a slight environmental adaptation. So, to calculate in vivo energy consumption, this study took a concept of estimate of the amount of basal metabolism in each tuber. In the validation experiments, the results of measuring solid accumulation of potatoes harvested at dates suggested by simulation agreed with the actual measured values in each regional field during the growth period of years from 2006 till 2010. The mean values of tuber solids level and inter-annual level variation in validation experiments were predicted well by the simulation model. And also, the results of validation experiments represent that concentration of tuber solids were due mainly to the duration of sunshine, above 190 hours per a month, and the cumulative amount of radiation, above 2,200 $MJ{\cdot}m^{-2}$, of the effective growth period.

• 공학교육연구
• /
• 제26권6호
• /
• pp.40-50
• /
• 2023

This study is to examine the validity of assessing basic-level proficiency in physics among incoming engineering freshmen through item analysis and standard setting. For empirical analysis, we examined the physics subject taken by the freshman class of 2021 at K University, considering its significance for engineering students. In this study, we initially performed item analysis utilizing both classical test theory and item response theory. Subsequently, leveraging the item and test information, we employed a modified Angoff method and the Bookmark method for standard setting. Consequently, the difficulty level initially set during item development was found to be higher than the actual performance level exhibited by the students. This study highlights a discernible disparity between the expected university standard and the real proficiency level of incoming freshmen in terms of basic academic ability in physics. Based on these research findings, a comprehensive discussion on the fundamental academic competence of engineering students was conducted, underscoring the necessity for formulating a tailored learning approach leveraging the outcomes from the basic ability test.

• 패션비즈니스
• /
• 제18권2호
• /
• pp.166-182
• /
• 2014

The purpose of this study is to develop a wedding dress design using digital clothing program to produce an actual dress. The level of actualization of the wedding dress design through digital clothing was evaluated by comparing the shape, ornament details, material, and tone. Also, the direction of improvement was sought by apprehending the limitations for the future of wedding dress design created by digital clothing. In order to evaluate the level of actualization on major design techniques of wedding dress, design planning of 4 dresses was performed based on the major images of wedding dresses. Virtual dress was created using DC Suite program and an actual wedding dress was produced using the pattern created in the process of virtual dress designing. The wedding dress designed by digital clothing was superior in silhouette or expression of pleats, but they rather lacked in expressing corsage, 3-dimensional objects, sheen material or double material. However, by supplementing a few functions, digital clothing can be effectively utilized in wedding dress design with the convenience and speed of digital operation. The digital clothing performs rapid production in the design development stage, modifies simply and confirms in real time and is highly effective, Therefore, if a program designed for wedding dress is developed, its effectiveness will be improved to maximize the customer satisfaction, and it will significantly reduce the time and cost which will make a great contribution to the wedding industry.

• 대한수학교육학회지:수학교육학연구
• /
• 제15권1호
• /
• pp.57-74
• /
• 2005

본 연구는 최근 여러 분야에서 관심이 되고 있는 Vygotsky의 근접발달영역 이론에 기초한 비계설정을 통한 수학 교수-학습 지도의 효과를 살펴보는 데 그 목적이 있다. 이러한 목적을 달성하기 위하여 Vygotsky의 근접발달영역 이론과 이를 근거로 학생들의 발달을 촉진하기 위한 비계설정 이론을 고찰하여 비계설정을 통한 수학 교수-학습과정을 개발한 후에, 이러한 과정에 따라 초등학교 5학년 학생들을 대상으로 분수 내용을 지도한 후에 수업 과정을 분석하고, 학생들의 수학 학습 능력과 수학적 태도에 미치는 영향을 분석하였다. 그 결과 교사에 의한 비계설정은 학습 효과를 높일 뿐만 아니라 학생과 학생 사이의 비계설정으로 전이되며, 학생들의 수학 학습 능력을 향상시키는 데 효과적이며, 수학적 태도를 긍정적으로 변화 시킴을 알 수 있었다.

• 동력기계공학회지
• /
• 제19권5호
• /
• pp.67-72
• /
• 2015

The reliable operation of onsite emergency diesel generator(EDG) should be ensured by a conditioning monitoring system designed to maintain, monitor and forecast the reliability level of diesel generator. The purpose of this paper is to develop condition diagnosis algorithm(logic) and analysis program of engine for the accurate diagnosis in actual condition of emergency diesel generator engine. As a result of this study, we confirmed that developed engine condition diagnosis algorithm and analysis program could be efficiently applied for actual EDG engine in nuclear power plant.

• Journal of Power Electronics
• /
• 제11권4호
• /
• pp.424-429
• /
• 2011

In this paper, the simulator of an on-line monitoring system for the range extender electric vehicle has been developed. The messages from the four control modules, the air pressure and fuel level sensors data, and the on/off switching states of 31 indicator lamps can be received through the control area network (CAN), and displayed on the graphic panel. The simulator was designed using the four DSP boards, variable resistors, and toggle switches instead of the four control modules, sensors, and switching state of indicator lamps on an actual series hybrid electric vehicle (SHEV) bus, respectively. The performance of the monitoring technologies was verified with the simulator at the laboratory, and then it was tested on an actual SHEV bus. The simulator is very useful at the initial development of the monitoring system at the hybrid-type or electrical vehicles.

• 한국주거학회논문집
• /
• 제15권1호
• /
• pp.103-112
• /
• 2004

The object of this study is to offer a basic reference for improving students' housing into a desirable living environments at small-sized local city. To do so, this study is to analyze residential choice elements and interior environment satisfaction of students around Samcheok national university at user's point. Trough the field survey and questionnaire about students' housing, the student's residential environment is almost composed of one room type of multifamily housing. But students' housing of this type is insufficient to the housing level which they demand. To obtain the real features as theirs housing, the development of the plan type to reflect the their actual demand is necessary. The results of this study can be applied to the actual design of hiring students' housing.

• 한국수학교육학회지시리즈A:수학교육
• /
• 제41권2호
• /
• pp.139-155
• /
• 2002

In this paper we represented the results of surveying on the present condition of mathematics education and the contents of the mathematics text books that are usually taught in Art High Schools interest in mathematics subjects and to achieve the higher level of mathematical abilities. We would like to raise their interest in mathematics and to improve the efficiency of teaching level on the basis of the 7th Mathematics Curriculum Revision. Some suggestions are of offered by considering the level of their mathematical abilities in Art High Schools and the present contents of the mathematical subjects from following views ⑴ the aspect of studying method ⑵ the aspect of revising contents of mathematics textbooks for them ⑶ the aspect of educational policies for Art High Schools