• International Journal of Automotive Technology
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• 제7권7호
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• pp.827-832
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• 2006

Occupant classification and position detection have been significant research areas in intelligent safety systems in the automotive field. The detection and classification of seat occupancy open up new ways to control the safety system. This paper deals with a novel algorithm development, hardware implementation and testing of a prototype intelligent safety system for occupant classification and position detection for in-vehicle environment. Borland C++ program is used to develop the novel algorithm interface between the sensor and data acquisition system. MEMS strain gauge hermatic pressure sensor containing micromachined integrated circuits is installed inside the passenger seat. The analog output of the sensor is connected with a connector to a PCI-9111 DG data acquisition card for occupancy detection, classification and position detection. The algorithm greatly improves the detection of whether an occupant is present or absent, and the classification of either adult, child or non-human object is determined from weights using the sensor. A simple computation algorithm provides the determination of the occupant's appropriate position using centroidal calculation. A real time operation is achieved with the system. The experimental results demonstrate that the performance of the implemented prototype is robust for occupant classification and position detection. This research may be applied in intelligent airbag design for efficient deployment.

• 대한토목학회논문집
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• 제5권2호
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• pp.67-73
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• 1985

수치지형모형(數値地形模型)(Digital Terrain Model)을 제작(製作)하는데 있어서 보다 더 정확(正確)한 지형정보(地形情報)의 획득방법(獲得方法)이 매우 큰 비중을 차지하고 있다. 본(本) 논문(論文)은 지형정보(地形情報)를 획득(獲得)하는 방법(方法)의 하나인 밀도증가식(密度增加式) 표본추출방법(標本抽出方法)의 정확성(正確性) 분석(分析)에 그 목적(目的)을 두었다. 특히, 정확성(正確性) 분석(分析)에 있어서는 아래와 같은 사항(事項)에 대(對)해 비교분석(比較分析)하였다. - 도화기(圖化機)에 의해 작도된 종래(從來)의 등고선(等高線)(Conventional Contourlines)과 밀도증가식(密度增加式) 표본추출방법(標本抽出方法)을 이용(利用)하여 작도(作圖)한 수치등고선(數値等高線)(Digital Contourlines)과의 위치오차(位置誤差)에 대(對)한 비교분석(比較分析) - 밀도증가식(密度增加式) 표본추출방법(標本抽出方法)의 적용(適用)에 따른 보간점(補間點)에 대(對)한 표고오차(標高誤差)의 분석(分析) 위의 수치시험(數値試驗)을 위하여 등고선(等高線)의 자동작도(自動作圖)에 관한 전산(電算)프로그램을 작성(作成)했다. 시험결과(試驗結果)와 시산치(試算値)와 추출조건(抽出條件)은 정확도(正確度)와 밀접(密接)한 관계를 가지며, 특히 시산치(試算値) 1.0 m이고, 표준형(標準形)인 추출조건(抽出條件)에서는 종래(從來)의 등고선(等高線)과 거의 일치(一致)함을 알 수 있었다.

• Journal of Power Electronics
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• 제14권3호
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• pp.444-457
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• 2014

This paper presents the design and realization of a digital PV simulator with a Push-Pull Forward (PPF) circuit based on the principle of modular hardware and configurable software. A PPF circuit is chosen as the main circuit to restrain the magnetic biasing of the core for a DC-DC converter and to reduce the spike of the turn-off voltage across every switch. Control and I/O interface based on a personal computer (PC) and multifunction data acquisition card, can conveniently achieve the data acquisition and configuration of the control algorithm and interface due to the abundant software resources of computers. In addition, the control program developed in Matlab/Simulink can conveniently construct and adjust both the models and parameters. It can also run in real-time under the external mode of Simulink by loading the modules of the Real-Time Windows Target. The mathematic models of the Push-Pull Forward circuit and the digital PV simulator are established in this paper by the state-space averaging method. The pole-zero cancellation technique is employed and then its controller parameters are systematically designed based on the performance analysis of the root loci of the closed current loop with $k_i$ and $R_L$ as variables. A fuzzy PI controller based on the Takagi-Sugeno fuzzy model is applied to regulate the controller parameters self-adaptively according to the change of $R_L$ and the operating point of the PV simulator to match the controller parameters with $R_L$. The stationary and dynamic performances of the PV simulator are tested by experiments, and the experimental results show that the PV simulator has the merits of a wide effective working range, high steady-state accuracy and good dynamic performances.

• 한국환경생태학회지
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• 제33권3호
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• pp.333-340
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• 2019

다문화 배경 학생들이 늘어남에 따라 이들의 교육에 대한 관심이 높아지고 있다. 본 연구에서는 숲이 가지고 있는 산림치유인자들과 요인들을 활용하여 다문화 배경 학생들의 언어습득향상과 자아탄력성에 미치는 영향을 알아보고자 하였다. 실험대상은 청주시 ${\bigcirc}{\bigcirc}$동에 위치한 다문화예비학교 중학생 남녀 각각 10명을 대상으로 방과 후에 산림치유프로그램을 운영하였다. 실험기간은 2018년 4월12일부터 2018년 6월26일까지 매주 1회씩 12회기로 1시간 (60분)씩 실시하였다. 산림치유프로그램은 숲에 존재하는 다양한 환경요소를 활용하여 인체의 면역력을 높이고 신체적 정신적 건강을 회복시키는 활동이다. 프로그램 실시 전과 후에 자아탄력성의 차이를 알아보기 위해 대응표본 t-test를 실시하고 그 자료는 SPSS 18.0 프로그램으로 분석하였다. 그 결과 자아탄력성은 긍정사고능력, 문제해결능력, 친밀행동능력, 감정조절능력, 자율행동능력 등 하위요인 모두에서 통계적으로 유의미하게 향상되었다(p<.001). 언어능력향상은 기술통계로 알아본 결과 쓰기의 오류, 발음의 오류, 문장의 오류, 시제의 오류, 조사 접속사의 오류 모두에서 향상되었다. 본 연구결과가 향후 중도입국자녀들이나 다문화 배경 학생들의 자아탄력성과 언어습득향상에 기초자료로 활용되기를 기대한다.

• 한국산학기술학회논문지
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• 제22권6호
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• pp.50-59
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• 2021

민간 중소기업의 국방진출 활성화를 목적으로 하는 국방벤처 지원사업은 기업이 보유한 기술과 아이디어를 바탕으로 국방에 적용할 수 있도록 연구개발을 지원하는 사업이다. 이 사업은 '15년부터 방위사업청 출연금으로 운영되어 84개 과제를 지원해왔으며, 사업초기에 선정된 과제의 성과가 '18년부터 발생하고 있는 성과발생 초기단계의 사업이다. 향후 예산의 효율적인 활용과 효과적인 지원방안 수립을 위해 초기성과에 대한 분석이 필요한 상황이다. 본 연구에서는 현재까지 누적된 3년간의 성과분석을 위해 자료포락분석을 활용하였으며, 사업의 특성을 고려하여 기술성과와 사업화성과를 복합적으로 고려할 수 있는 단계별 성과분석모형을 적용하였다. 또한, 과제별로 투입된 예산 대비 연구개발 및 사업화효율성을 비교하였으며, 우수과제의 성과요인 파악을 위해 과제별 특성에 따라 분류하여 분석하였다. 분석결과를 바탕으로, 전반적인 성과분포와 높은 효율성을 갖는 과제의 특성을 확인하였고 이를 통해 효율적인 사업수행 및 지속적인 성과창출을 위한 발전 방안에 대해 고찰하였다. 향후 본 연구를 기반으로 효과적인 지원방안 수립이 가능할 것이며, 결과적으로는 국방벤처 지원사업의 효율성 강화와 우수성과 확대가 기대된다.

• 천문학회보
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• 제40권1호
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• pp.46.4-47
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• 2015

Carnegie Hubble Program II (hereafter CHP II) is a large Hubble Space Telescope (HST) observing campaign in the cycle 22 composed of a total of 184 orbits (132 primes + 52 parallels), which aims to measure H0 directly with an unprecedented accuracy. Unlike our previous efforts in CHP I which used Cepheids as a yardstick, CHP II takes the Population II (Pop II) distance indicators such as RR Lyraes and tip of the red giant branch stars (TRGBs) to set up a new calibration to Type Ia supernovae (SN Ia) distance. The Pop II distance scales have two immediate advantages over the classical Cepheid method: 1) The period-luminosity relation of the RR Lyrae has a scatter that is a factor of 2 smaller; 2) The RR Lyrae/TRGB distance scale can be applied to both elliptical and spiral galaxies. This will provide a great systematic benefit by ultimately allowing us to double the number of SN Ia distances based on geometry. By taking advantage of this Pop II route, we expect to measure H0 value to 3 % of error which will be the highest accuracy H0 measurement to date using the "Distance Ladder" method. In this talk I will present a brief background/overview on the CHP II, observations/data acquisition status, and ongoing research progress/preliminary results.

• Nutrition Research and Practice
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• 제10권2호
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• pp.237-244
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• 2016

BACKGROUND/OBJECTIVES: The current South Korean government policy on food irradiation technology should be reformed based on an in-depth investigation of the communications aspect, because the issue is no longer of a technological nature, given the proven safety and efficacy of the processes. SUBJECTS/METHODS: The target population of the education program consisted of elementary, middle, and high school students attending 310 schools in South Korea (2013: 63 schools, 2014: 104 schools, 2015: 143 schools). Data subjected to analysis were 13,327 pre-education and 12,641 post-education questionnaires received from 7,582 elementary, 2,671 middle, and 3,249 high school students who participated in the education program from May 2012 to April 2015 (n = 12,831), after the exclusion of inadequately filled-in questionnaires. RESULTS: Analysis of the three-year educational effect trend was conducted by comparing levels of variables before and after food radiation education. The analysis yielded the finding that the post-education levels were significantly higher for all variables. That is, for interest in education, perception (necessity, safety, subjective knowledge, and information acquisition), objective knowledge, and attitude, with the sole exception of objective knowledge in 2013. CONCLUSIONS: Given that post-education levels of perception, knowledge, and attitude concerning irradiated foods increased considerably compared to pre-education levels, behavior change should be induced by providing continuous education to enhance, these primary variables.

• 한국간호교육학회지
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• 제15권1호
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• pp.5-14
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• 2009

Purpose: The purpose of this study was to develop clinical education of Oriental Nursing. Methods: The subjects were one hundred and ninety-three students who have completed clinical practice. The questionnaires were composed of experience type and Oriental Nursing practices(25 items), level of satisfaction(20 items), difficulty level of practices(6 items), and preparation level of practice instructor(5 items). The reliability were Chronbach's $\alpha$=.84, .86, .74, and .93 respectively. Frequencies, percentage, t-test, and Pearson's Correlation was used in data analysis using SPSS PC+ 11.0. Results: Nursing students recognized that they had difficulties caused by a lack of knowledge of Oriental medicine, of learning the uniqueness of the nurse's role and lack of nurse's enthusiasm in teaching students. However, they were confident in preparing acupuncture and implementing Moxibustion, large Moxibustion, Bu-Hang therapy, aroma therapy and on administration of medicines and control of temperature of the medicines, exercise and rehabilitation. Therefore, instructors should train nursing students by developing a unique Oriental Nursing practice and reinforcement of nurses' independent and cooperative roles through the acquisition of Oriental Medical knowledge and terminology. It is necessary that they develop an educational program based on Oriental Nursing practice, perform consistently within the program and train its teaching faculty and instructors.

• 천문학회지
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• 제38권4호
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• pp.445-462
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• 2005

In a companion paper, we have presented so-called Spatio-Spectral Maximum Entropy Method (SSMEM) particularly designed for Fourier-Transform imaging over a wide spectral range. The SSMEM allows simultaneous acquisition of both spectral and spatial information and we consider it most suitable for imaging spectroscopy of solar microwave emission. In this paper, we run the SSMEM for a realistic model of solar microwave radiation and a model array resembling the Owens Valley Solar Array in order to identify and resolve possible issues in the application of the SSMEM to solar microwave imaging spectroscopy. We mainly concern ourselves with issues as to how the frequency dependent noise in the data and frequency-dependent variations of source size and background flux will affect the result of imaging spectroscopy under the SSMEM. We also test the capability of the SSMEM against other conventional techniques, CLEAN and MEM.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2003년도 춘계학술대회 논문집
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• pp.1131-1134
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• 2003

Unknown parameters of a nonlinear system were estimated using a signal compression method. The estimated parameters were natural frequency and tile damping coefficient. This study applied a algorithm using tile comparison of the cross-correlation coefficient between the impulse response from a model and it from the signal compression method. The impulse through linear element included in a nonlinear system could be obtained by the signal compression method. The unknown parameters of the linear element could be estimated by comparing the Bode plots of system's impulse response with them of model's response. In this study, a LSCM(LabVIEW-Signal-Compression-Method) was developed to identify a nonlinear system. The LSCM consisted of National Instrument's (NI) Data Acquisition (DAQ) Board (Model PCI-1200), a monitoring program using LabVIEW software package, DAQ Signal Accessory Board, and 2nd-order electric circuits. The designed electric circuits consisted of resistors, inductors and capacitors. To evaluate the performance of the LSCM, the response from model with known parameters is compared with the response from the real system using the monitoring program. The results from simulation of experiment showed that the developed LSCM provided a reliable estimation performance.