• Title/Summary/Keyword: Actual data

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Database of virtual spectrum of artificial radionuclides for education and training in in-situ gamma spectrometry

  • Yoomi Choi;Young-Yong Ji;Sungyeop Joung
    • Nuclear Engineering and Technology
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    • 제55권1호
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    • pp.190-200
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    • 2023
  • As the field of application of in-situ gamma spectroscopy is diversified, proficiency is required for consistent and accurate analysis. In this study, a program was developed to virtually create gamma energy spectra of artificial nuclides, which are difficult to obtain through actual measurements, for training. The virtual spectrum was created by synthesizing the spectra of the background radiation obtained through actual measurement and the theoretical spectra of the artificial radionuclides obtained by a Monte Carlo simulation. Since the theoretical spectrum can only be obtained for a given geometrical structure, representative major geometries for in-situ measurement (ground surface, concrete wall, radioactive waste drum) and the detectors (HPGe, NaI(Tl), LaBr3(Ce)) were predetermined. Generated virtual spectra were verified in terms of validity and harmonization by gamma spectrometry and energy calibration. As a result, it was confirmed that the energy calibration results including the peaks of the measured spectrum and the peaks of the theoretical spectrum showed differences of less than 1 keV from the actual energies, and that the calculated radioactivity showed a difference within 20% from the actual inputted radioactivity. The verified data were assembled into a database and a program that can generate a virtual spectrum of desired condition was developed.

구직자의 취업스펙이 실제취업에 미치는 영향에 대한 탐색적 연구: 선별이론 및 이중노동시장이론을 중심으로 (The Differentiating Effects of Job Seekers' Spec on Actual Employment: Focusing on Screening Hypothesis and Dual Labor Market Theory)

  • 박지성;옥지호
    • 아태비즈니스연구
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    • 제13권4호
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    • pp.11-24
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    • 2022
  • Purpose - The purpose of this study was to examine how job seekers' spec influence their actual employment especially focusing on the differentiating effects of applicants' specs depending on whether general or decent job employment. Design/methodology/approach - This study conducted analyses on 54,443 samples that incorporated data from the Graduates Occupational Mobility Survey for three years (2017-2019) collected by the Korea Employment Information Service. The linear probability model and logit model were used to examine the research questions. Findings - The results analyzed with the hierarchical regression model showed that most job seekers' specs were statistically significant in predicting employment status. Interestingly, there is a difference between the factors predicting employment for a general job and a decent job. This study suggests academic and practical implications for future research in the selection/ recruitment field by clarifying the critical factors to influence applicants' employment. Research implications or Originality The results of this study follow the screening hypothesis which explains that the applicants' specs have significant impacts on actual employment. Also, the dual labor market theory, which explains that applicants' specs differently affect actual employment between general and decent jobs, was reaffirmed.

Smart Factory Big Data를 활용한 공정 이상 탐지 프로세스 적용 사례 연구 (A case study on the application of process abnormal detection process using big data in smart factory)

  • 남현우
    • 응용통계연구
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    • 제34권1호
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    • pp.99-114
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    • 2021
  • 반도체 제조 산업에서는 Big Data에 기초한 Smart Factory 도입과 적용이 가시화되면서 생산 공정의 각 단계에서 수집 가능한 다양한 센서(sensor) 데이터를 활용하여 공정 이상 탐지 및 최종 수율 예측 등에 다양한 분석 방법을 시도하고 있다. 현재 반도체 공정은 원료인 잉곳(ingot)에서 패키징(packaging) 작업 이전의 웨이퍼(wafer) 생산까지 500 600개 이상의 세부 공정과 이와 연계된 수천 개의 계측 공정으로 구성된다. 개별 계측 공정 내의 실제 계측 비율은 대상 제품 대비 0.1%에서 최대 5%를 넘지 못하고 계측 시점별로 일정하게 유지할 수 없다. 이러한 이유로 공정 각 단계의 정상 상태를 간접적으로 판단할 수 있는 장비 센서(sensor) 데이터를 활용하여 관리 여부를 판단하고자 하는 노력이 계속되고 있다. 본 연구에서는 장비 센서 데이터 기반의 공정 이상 탐지 프로세스를 정의하고 현재 적용 되고 있는 기술 통계량 기반 진단 방법의 단점을 보완하기 위해 FDA(Functional Data Analysis)방법을 활용하였다. 실제 현장 사례 데이터에 머신러닝을 이용하여 이상 탐지 정확도 비교를 통해 효과성을 검증하였다.

Fusion of Sonar and Laser Sensor for Mobile Robot Environment Recognition

  • Kim, Kyung-Hoon;Cho, Hyung-Suck
    • 제어로봇시스템학회:학술대회논문집
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    • 제어로봇시스템학회 2001년도 ICCAS
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    • pp.91.3-91
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    • 2001
  • A sensor fusion scheme for mobile robot environment recognition that incorporates range data and contour data is proposed. Ultrasonic sensor provides coarse spatial description but guarantees open space with no obstacle within sonic cone with relatively high belief. Laser structured light system provides detailed contour description of environment but prone to light noise and is easily affected by surface reflectivity. Overall fusion process is composed of two stages: Noise elimination and belief updates. Dempster Shafer´s evidential reasoning is applied at each stage. Open space estimation from sonar range measurements brings elimination of noisy lines from laser sensor. Comparing actual sonar data to the simulated sonar data enables ...

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The Analysis of User Perception and Attitude Using SNS Data about Emergency Contraceptive Pills

  • 이성현
    • 인터넷정보학회논문지
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    • 제18권1호
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    • pp.143-152
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    • 2017
  • In order to ensure the right of self-determination of women, most of countries allow women to buy post-coital contraceptive pills or general medical supplies with ease. This study aims to analyze how ordinary people recognize and respond to post-coital contraceptive pills through collecting atypical data by using the keyword 'Contraception', rather than using the existing actual condition survey, such as questionnaire and interview, so that the results have been presented, which may be referred to for establishment of policies.

스트레인게이지 센서용 데이터획득시스템의 개발 (Development of Data Acquisition System for Strain Gauge Sensor)

  • 조시형;박찬원
    • 산업기술연구
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    • 제30권A호
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    • pp.89-93
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    • 2010
  • This research suggested a development of a Data Acquisition System for strain gauge sensor which enables the usage of portable device in the various engineering field that includes, a strain indicator which is frequently used in civil and mechanical engineering, and a GUI function of data acquisition device. The developed system can record 16 channels of strain gauges at a time and its resolution is over 16 bits which can be used effectively in the actual field.

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국군간호사관학교 교육과정 개선을 위한 기초 연구 (A Study on Curriculum Improvement of the Korea Army Nursing Academy)

  • 고자경
    • 대한간호학회지
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    • 제13권2호
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    • pp.22-43
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    • 1983
  • 1. Need for and Purpose of the Study. There is an increasing demand for curriculum improvement of the Korean Army Nursing Academy (KANA), since it was upgraded into 4-year institution of higher learning from 3-year one. In particular, it is strongly advocated that the KANA needs the outside expertise for its curriculum improvement-namely not only from the internal military view of points but also from the viewpoints of professional educational society, In line with such a necessity for the study, this study was aimed at 1) analyzing the current actual practices of KANA'S curriculum, 2) investigating the desired practices of KANA'S curriculum, and 3) identifying the discrepancy between the actual and desired practices of curriculum. 2. Problems for the Study This study had 4 problems to be answeared as follows: 1) What are the actual curriculum practices of KANA? 2) What are the desired curriculum practices of KANA? 3) How are the extents of perception of actual and desired curriculum different in four groups (student, faculty & administrator, nurse, and medical doctor in militay hospital) ? 4) What are the restraining forces that impede the change from actual to desired curriculum practices? 5) What are the relationships of curriculum component,』 in actual and desired curriculum practices? 3. Methods and Procedures This study was conducted by means of document analysis in addition to literature review and by means of needs assessment questionnaire which was developed by the researcher. The questionnaire included 62 statments with 7 questions for demographic data collection. The needs assessment questionnaire was managed to a total of 243 subjects (100 students, 46 faculty & administrators, 55 nurses, and 42 medical doctors), The collected data were treated using SPSS computer system so as to calculate mean scores, standard deviations, and correlation coefficients. The significance test was made through t-test and one-way ANOVA. The statistical significance level was set at both .05 and .01 level. 4. Major findings The major findings in this study are as follows: 1) The score of desired practices was significantly greater than that of actual practices, representing a strong need for curriculum betterment. 2) There were significant differences in the perceptions of actual practices as well as desired practices among four groups (student, faculty & administrater, nurse, and medical doctor). 3) The most frequently selected restraining forces were army's inherent character, economical limitation, and educational expertise limitations. 4) Such variables as sex, position attachment to the KANA and grade made a statistically significant effect on the perception of desired curriculum practice, while the variables like marrige, position, and military class made it on the perception of actual curriculum practice. 5) The coefficients among the curriculum components were lower in perception of the actual curriculum practices than those in the desired practices. 5. Conclusions The conclusions based on the major findings of this study are as follows: 1) The current curriculum development procedure of the KANA is not consistent with the theoretical frame of systematic development sarategy of curriculum. 2) There are wide conflicts among the groups who are supposed to participate in curriculnm development, concerning the actual and desired practices of KANN'S curriculum. 3) A great deal of need for curriculum improvement for the KANA is clearly felt, and in particular, in the process of teaching and learning. 4) Each component of curriculum is not intergrated into a whole development procedure, being segregated each other. 5) For better curriculum improvement, such restraining forces as financial and professional limitations should be eliminated. 6. Recommendations 1) For Further Research a. There is a need to replicate this study after in-depth statistical analysis of each item of need assessment questionnaire, and with more representative subjects. b. A study should be conducted which. has its focus on the analysis of restraining forces for the change from actual to desired curriculum practices of the KANA. 2) For KANA'S Curriculum Improvement a. There is a need to promote the professional expertise of the participants in curriculum development and the communication among them. b. It is desirable to establish an institution or section of administration, which is soley in charge of curriculum development. c. To better develop KANA's curriculum not only faculty and administrators but also students should be encouraged to participate in development process, while the military medical doctors' participation should be carefully considered.

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신축 공공도서관의 지위적 역할에 따른 규모와 지역 특성에 따른 건립공사비 기준에 관한 연구 (A Study on the Guideline of construction cost according to Size of position and Regional characteristics of New Public Libraries)

  • 이철재;윤지원;이민
    • 한국실내디자인학회논문집
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    • 제26권3호
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    • pp.113-120
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    • 2017
  • As the functions and roles of public libraries expand, it is time for qualitative growth. In order to improve the quality of public libraries, it is important to plan actual construction costs through systematic feasibility study. Therefore, the purpose of this study is to present the guideline of construction costs considering the size and regional characteristics according to the status role of the new public libraries. The construction costs are based on actual data. The results of the study are as follows. First, we derived the analysis framework according to the size and regional characteristics. The status role of the public libraries was considered theoretically. The size was classified according to status role of the public libraries. Regional characteristics were classified through literature review. Through this, an analysis framework was derived according to size and region. Second, the actual data on construction costs of the new public libraries were examined and analyzed. Basic factors, size, area, and construction costs were analyzed for 285 libraries nationwide that opened from 2010 to 2016. The data of 129 newly opened public libraries were classified. To present construction costs depending on price fluctuation, construction cost index was analyzed as of September 2016. Third, a guideline of construction costs for new public libraries was suggested. The construction cost per $1m^2$ of building area was analyzed. By multiplying 116.70(p), the construction cost index, the construction cost per $1m^2$ of total building area was calculated to be 2,472,350 won. When applying the research result, construction costs can be gained by adding construction cost index of the month.

효율성과 목표원가를 반영한 병원예산 원가차이 분석 모형 설계 (A Study on the design of hospital budget variance analysis model reflecting efficiency and an attainable target cost)

  • 오동일
    • 한국산학기술학회논문지
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    • 제14권2호
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    • pp.696-706
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    • 2013
  • 본 연구는 DEA모형에 바탕을 둔 표준원가에 기초한 원가차이 분석의 개념을 구현할 수 있는 모형을 설계하고 69개 종합병원의 투입 산출물을 이용해 효율성 분석과 원가관리 방안을 살펴보았다. 이를 위해 DEA모형을 통해 달성가능한 목표원가를 구하고 이를 실제원가와 비교하여 차이분석모형의 틀을 구축하였다. 또한 이 모형을 바탕으로 의사 간호사 인건비 정보를 구해 2008년도 결산기준 69개 종합병원의 표준원가차이를 구하고 이를 기술적 비효율성으로 인한 원가차이, 가격 비효율성에 기인한 원가차이, 표준예산원가 원가차이로 분리하여 원가관리의 새로운 방식을 제시할 수 있었다. 또한 실증분석을 통해 69개 종합병원은 병상수와 같은 규모를 늘리는 것이 효율성 개선에 기여하지 않으며 오히려 예산목표원가 관리 측면에서는 비효율적인 것으로 나타나 규모 확장 일변도의 전략을 수정할 필요가 있는 것으로 나타났다.

통계적 분석기법을 통한 함정 건조기간 예측모델에 관한 연구 (A Study on the Prediction Model of the Warship Construction Period through Statistical Analysis)

  • 최대욱;마정목
    • 한국산학기술학회논문지
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    • 제21권3호
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    • pp.497-502
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    • 2020
  • 소요군에서 원하는 성능의 함정을 적기에 획득하기 위해서는 정확하게 일정을 예측하고 계획하여 함정을 건조해야 한다. 하지만 지금까지 함정의 건조기간을 산정한 연구를 살펴보면, 전문가 집단의 설문을 통한 주관적인 연구방법으로 수행되어 건조기간 산출의 정확성과 일관성이 부족하고, 실 데이터를 바탕으로 이루어진 학술적 연구는 없었다. 따라서 본 연구에서는 함정 건조기간 산출의 정확성을 높이고 일관성을 유지하기 위해 실 데이터를 바탕으로 선형회귀분석을 통해 예측 모델을 제시하고자 한다. 이를 위해 먼저 함정사업의 절차 및 특성을 이해하고 함정사업 유경험자를 대상으로 함정 건조기간에 영향을 미칠 것으로 추측되는 요인을 찾아보았다. 그 다음 과거 연구개발된 함정들의 실적을 바탕으로 함정 건조기간에 영향을 미칠 것으로 추측되는 요인들의 실 데이터를 최대치로 수집하고 단계적 회귀분석을 실시하였다. 그 결과 함정 건조기간에 영향을 미치는 요인으로 소요군 주관 시험평가 항목수, 장비수, 연구개발 장비수가 선정되었다. 수집한 데이터를 회귀방정식에 대입하여 내적 타당성을 확인해본 결과 평균 96.5%의 정확도를 보였다.