• 제목/요약/키워드: area measurement

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초등학생이 일상생활 중 경험하는 스트레스 측정 도구 개발 (The Development of a Stress Measurement Tool for School Children in Chon-buk Area)

  • 정승희;정영숙
    • 한국학교보건학회지
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    • 제11권2호
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    • pp.279-284
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    • 1998
  • The purpose of this study was to propose the baseline data for the development of a stress measurement tool for primary school students. The data were collected from 650 students from four primary schools in the Chon-buk area from April 1 to May 30, 1995. Through a pretest and literature review a questionaire was designed with 57 stressors experienced by school children in daily life. Reliability of the tool was tested by a Cronbach's alpha and the result was ${\alpha}=.9137$. Factor analysis was applied to organize the 57 items together. As the result, 8 factors were obtained and these factors explained 40% of the variance. The 8 factors were: 1) Life events related to family, 2) Conflict related to friend & senior or junior, 3) Educational attitude of parents, 4) Own personality, 5) School life events, 6) Scolding by teacher and parent, 7) Conflict with interpersonal relationship, and 8) Change of situation.

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과학기술연구자(科學技術硏究者)의 업무수행도(業務遂行度) 및 생산성(生産性)에 관한 종합적(綜合的) 고찰(考察) (Performance and Productivity of Researchers in the Area of Science and Technology : A Review)

  • 장경;이진주
    • 대한산업공학회지
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    • 제5권2호
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    • pp.57-69
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    • 1979
  • This review focuses on the individual performance and productivity of researchers in the area of science and technology. The researchers in the paper are classified into individual inventors without organizational affiliation and researchers in the organization, which are distinguished by cosmopolitanic professionals and local institutionalists. The productivity of researchers is in general measured by different indicators or measurement scales such as: i) subjective evaluation of overall research performance, (ii) the number of published papers, reports and books, iii) the quality of research output (e.g. citation frequency), iv) originality of research ouput (e,g, patents), v) multiple measurement scales, etc. According to the literature based on empirical study, the productivity of individual reseachers is positively related to the degree of freedom, communication, diversity, dedication, and motivation and negatively related to the degree of similarity, and satisfaction. However, other factors such as creativity, age, supervisory behavior and group characteristics have shown irregular direction of correlation.

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지형변화의 양적측정에 의한 수치지형모델의 적용 (The Application of Digital Terrain Model with respect to the Quantitative Measurement of the Terrain Roughness)

  • 유복모;권현
    • 한국측량학회지
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    • 제5권1호
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    • pp.43-48
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    • 1987
  • 지형의 변화를 양적으로 표시하는 매개변수-경사도, 곡율, 돌출빈도 및 표면적과 이에 대응하는 평면적의 비-로부터 지형을 분류하고, 이 지형에 따른 적합곡면식을 찾는다. 평탄지형, 완곡지형, 불규척지형을 지형변화양의 변수들에 의해 분류하였고, 평탄지형에는 선형평면식, 완곡지형은 3차 및 5차 곡면식, 그리고 불규칙지형은 5차 곡면식이 적합됨을 알 수 있었다.

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스크린 망사의 견장과 오프닝의 변화 (The Opening Size Change for Screen Tension)

  • 정기영;강영립
    • 한국인쇄학회지
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    • 제28권1호
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    • pp.43-50
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    • 2010
  • The 200mesh screen was tensioned and fixed on a frame. When applied tension to 5N and 10N per unit area, a side length of opening of the screen was 163.223${\mu}m$ and 168.224${\mu}m$, respective. But side length not tensioned was 158.879${\mu}m$. We knew that a side length of opening of the screen rarely changes with tension applied to the screen. The appearances that a side length of opening of the screen expand little are due to a decreasing diameter of thread by means of tension. In a thickness measurement of screen, While the high density mesh screen that had a lot of knots that crossed a line of latitude and longitude per unit area appeared a higher numerical value, the low density mesh screen that had a few knots appeared a low numerical value.

고로슬래그 미분말을 사용한 콘크리트 내의 철근부식에 관한 실험적 연구 (An Experimental Study on the Reinforcement Corrosion in Concrete Using Granulated Blast Furnace Slag)

  • 이동혁;김은겸;김영웅;김영철
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 2002년도 봄 학술발표회 논문집
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    • pp.761-766
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    • 2002
  • This paper was peformed to verify the effect that granulated blast furnace slag gets in reinforcement corrosion resistance about chloride ion that invade from outside. An experiment accelerated for the reinforcement corrosion through repeat of brine digestion and dry. Reinforcement corrosion investigated half cell potential method of measurement by ASTM C876 and corrosion area ratio. If granulated blast furnace slag metathesis ratio is high generally that looked the corrosion of reinforcement decreasing as a result that evaluate reinforcement corrosion by ASTM C876 canon in this research. It showed high resistance about reinforcement corrosion that use normal portland cement and increase the metathesis rate of granulated blast furnace slag, as a result that evaluate metathesis rate effect of granulated blast furnace slag according to cement kind. when the test piece split destroying, area rate of reinforcement corrosion showed about result of half cell potential measurement.

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BGA 소자의 볼 정점 높이 측정을 위한 스테레오 비젼 알고리즘 개발 (The Development of a Stereo vision algorithm for Height Measurement of Ball Peak Point of BGA Device)

  • 이상신;박영순;김준식;주효남
    • 한국조명전기설비학회:학술대회논문집
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    • 한국조명전기설비학회 2005년도 춘계학술대회논문집
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    • pp.431-436
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    • 2005
  • In this paper, We proposed the stereo image modeling using 2-dimensional images captured by the high resolution cameras to inspect the ball defects of BGA(Ball Grid Array) device. The proposed algorithm consists of the package/ball area extraction part, the FOV(Field of View) calibration part, the top point matching part, and ball height measurement part, In the package/ ball area extraction part, the package and ball areas are separately extracted in a left and right image by the extraction algerian. Through the experiment, we draw out the result.

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시험업무에 대한 CMMI 공학 프로세스 분야 모델링 연구 (A Study on the CMMI Engineering Process Area Modelling of Test Process)

  • 최주호;류충호;장용식;김흥범
    • 한국군사과학기술학회지
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    • 제13권2호
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    • pp.235-242
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    • 2010
  • DSTC(Defense Systems Test Center) in ADD(Agency for Defense Development) performs a test for various kinds of weapon system. In order to provide accurate test measurement data relating to the weapon system's performance with customer, A reliable test process and an objective analysis of the measurement data are required. DSTC is trying to apply CMMI(Capability Maturity Model Integration) Ver 1.2 in a test process. In this paper, we present the result of CMMI Engineering Process Area Modelling of Test Process.

녹지대 분포가 도시 지역의 소기후에 미치는 영향 (On the Impacts to the Loca l Climate Change of Urban Area due to the Vegetation Canopy)

  • 진병화;변희룡
    • 한국환경과학회지
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    • 제9권2호
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    • pp.101-108
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    • 2000
  • Through numerical experiment using simplified OSU-1D PBL(Oregon State University One-Dimensional Planetary Boundary Layer) model and field measurement, we studied the impacts of vegetation canopy on heat island that was one of the characteristics of local climaate in urban area. it was found that if the fraction of vegetation was extended by 10 percent, the maximum air temperature and the maximum ground temperature can come down about 0.9${\circ}C$, 2.3${\circ}C$, respectively. Even though the field measurement was done under a little unstable atmospheric condition, the canopy air temperature was lower in the daytime, and higher at night than the air and ground temperature. This result suggests that the extention of vegetation canopy can bring about more pleasant local climate by causing the oasis, the shade and the blanket effect.

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저항용접에서의 용접성 평가에 관한 연구 (A Study on the Evaluation of Weldability in Spot Welding)

  • 홍민성;김종민
    • 한국공작기계학회:학술대회논문집
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    • 한국공작기계학회 2003년도 추계학술대회
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    • pp.301-306
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    • 2003
  • Spot welding is frequently used for industrial purpose, such as automobile and aerospace industries and household appliances due to its high performance. In these day, robotization and systemization of welding process made it possible to produce more precise or smaller electric parts. And when it comes to welding of steel sheet, the size of nugget must be getting smaller. Therefore, welding conditions are limited to avoid defects, such as deformation, damage, weakening of joining area. In this research, the measurement of the nugget size by the nondestructive inspection has been conducted. As a result, the right estimation of the nugget size and void defects, the detection of corona bond near joining area, the selection of the optimum ultrasonic mode, and set up for ultrasonic inspection are studied. From the trustworthy solutions of nugget size estimated by results of measurement, the optimum inspection conditions depending upon the width of welding parts are determined as well.

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FPSO Topside의 소음특성 파악 및 저감대책 (A Noise Characteristics and Countermeasures of FPSO Topside)

  • 김동해;김성훈;정건화
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2005년도 추계 학술대회논문집(수송기계편)
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    • pp.73-76
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    • 2005
  • Recently, the demand for the Floating, Production, Storage, and Offloading facility (FPSO) which has some economic and technical advantages, has increased in offshore oil production areas. FPSO vessel dose not have self-propulsion system, but has additional facilities for oil production and positioning system. Main noise sources such as gas turbines, compressors, and pumps, are located on top of the hull (Topside area). In general, the noise regulation for the offshore structure is severer than that of the cargo ship and acceptable noise limit of cabin is specified as 45 dB(A). This paper describes the noise characteristics and the countermeasures for FPSO Topside area through investigation of noise analysis and site measurement results. Proper countermeasures, considering the characteristics of sources and receiver spaces, were applied from the noise prediction and various measurement results. Finally, this ship was successfully delivered with excellent noise properties.

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