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검색결과 1,252건 처리시간 0.034초

실시간신호제어를 위한 차량검지기 정보의 신뢰성 비교평가 (A Comparative Evaluation of Confidence of Vehicle-Dectetor Informations for Real-Time Traffic Signal Control.)

  • 오영태;이철기
    • 대한교통학회지
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    • 제14권3호
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    • pp.91-125
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    • 1996
  • The purpose of this paper is comparatively to evaluate the confidence of Vehicle-Detector informations for various detectors in order to test to be possible the application of these to real time traffic signal control. The detectors which are tested for this study are Circle-Shaped Loop, Ultrasonic, Microwave and Image detector. The tested items for each detectors are traffic volume, degree of saturation for through and left turn movement, speed and queue length, etc. These items for each are tested at the field according to several situations, such as dry day, raining day, night and daytime. The result of these tests are performed comparative analysis and statistical examination in order to increase the confidence of the experiments.

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농촌주부의 생활개선 교육 요구분석 I -생활개선 교육의 방법에 대한 요구를 중심으로- (A Heed Assessment of Home Improvement Education for Rural Women -The aspect of educational methods and charactristics of rural women-)

  • 나순애;이한기
    • 한국농촌생활과학회지
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    • 제4권2호
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    • pp.115-125
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    • 1993
  • The purpose of this study was to provide useful data for developing adult education program by assessing educational needs of rural women in home improvement educational contents. Data of this study were collected by interview from 500 home makers who are under 65 years old in 20 areas in Korea. The results are as follows : 1) Winter was favorite season, and good time band during a day was afternoon. Favorite teaching hours were 2∼3 hours a day and 1∼3 days per term. And they wanted village convention center or rural gidance office as educational place, and prefered lecturer is home improvement extension worker. 2) Among relationship between needs for education method and individual variables, is only corelated with rural women's living and educational degree significantly. To improve educational effect, teaching method is more prefered for the participatory education than lecture. It should be provided with exclusive educational place, and be increased professional field workes with obligation and power.

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노티의 재료에 따른 이화학적, 관능적 및 기계적 특성 연구 -제 3 보: 찰기장 노티의 이화학적, 관능적 및 기계적 특성 연구- (Effect of Cereals on the Physicochemical and Sensory Characteristics of Noti - III. Study on the Physicochemical and Sensory Characteristics of Glutinous Chinese millet Noti -)

  • 임희정;염초애
    • 한국식품조리과학회지
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    • 제12권3호
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    • pp.320-330
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    • 1996
  • This study was undertaken to investigate the effect of cereals on the physicochemical and ,sensory characteristics of Noti. Noti is one of Korean traditional pan-fried glutinous cereal cakes. In this case, Noti was made from the steamed glutinous Chinese millet flour. Acid value was not increased abruptly. TBA value was maintained, reducing sugar content was increased, and the average value of gelatinization degree was increased as compared with the first day that glutinous Chinese millet Noti was made during 90 day storage. Through sensory evalution, flavor, consistency(the inner part), and moistness were unfavorable according to the storage. The texture tended to increase depending upon the storage period. The hardness of glutinous Chinese millet Noti by Instron measurement was slowly increased. Cohesiveness and elasticity were increased during storage.

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Reproducible Chemical Mechanical Polishing Characteristics of Shallow Trench Isolation Structure using High Selectivity Slurry

  • Jeong, So-Young;Seo, Yong-Jin;Kim, Sang-Yong
    • Transactions on Electrical and Electronic Materials
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    • 제3권4호
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    • pp.5-9
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    • 2002
  • Chemical mechanical polishing (CMP) has become the preferred planarization method for multilevel interconnect technology due to its ability to achieve a high degree of feature level planarity. Especially, to achieve the higher density and greater performance, shallow trench isolation (STI)-CMP process has been attracted attention for multilevel interconnection as an essential isolation technology. Also, it was possible to apply the direct STI-CMP process without reverse moat etch step using high selectivity slurry (HSS). In this work, we determined the process margin with optimized process conditions to apply HSS STI-CMP process. Then, we evaluated the reliability and reproducibility of STI-CMP process through the optimal process conditions. The wafer-to-wafer thickness variation and day-by-day reproducibility of STI-CMP process after repeatable tests were investigated. Our experimental results show, quite acceptable and reproducible CMP results with a wafer-to-wafer thickness variation within 400$\AA$.

고학년 초등학생의 컴퓨터 게임 중독 실태 및 영향요인 (Computer Game Addiction and it's Predictors of Korean Elementary School Children)

  • 오원옥
    • Child Health Nursing Research
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    • 제10권3호
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    • pp.282-290
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    • 2004
  • Purpose: The measure the degree of computer game addiction; to examine the relationship between computer game addiction and contributing factors; and to discover the predictors of computer game addiction of elementary school children of Korea. Method: Data were assembled from questionnaires distributed among 455 children from four elementary schools in Gyung-buk Province. Result: The level of computer game addiction of subjects was rather low, and correlated significantly with gender, academic performance, family economic status, playmates for leisure time, place of playing computer game, length of the habit of playing game, average playing time of game per day, frequency of PC-room(Internet Cafe for game) visits per week, game partners and reasons for playing game. Multiple regression analysis showed that 45% of the computer game addiction was significantly related to gender(21%), impulsiveness(10%), average playing time of game per day(9%), depression(2%) and other variables(3%) such as playmates for leisure time, academic performance and frequency of PC-room visits per week. Conclusion: We suggest these results be used to develop a computer game addiction prevention program.

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Network Security Practices through Anonymity

  • Smitha, G R;Suprith C Shekar;Ujwal Mirji
    • International Journal of Computer Science & Network Security
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    • 제24권4호
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    • pp.155-162
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    • 2024
  • Anonymity online has been an ever so fundamental topic among journalists, experts, cybersecurity professionals, corporate whistleblowers. Highest degree of anonymity online can be obtained by mimicking a normal everyday user of the internet. Without raising any flags of suspicion and perfectly merging with the masses of public users. Online Security is a very diverse topic, with new exploits, malwares, ransomwares, zero-day attacks, breaches occurring every day, staying updated with the latest security measures against them is quite expensive and resource intensive. Network security through anonymity focuses on being unidentifiable by disguising or blending into the public to become invisible to the targeted attacks. By following strict digital discipline, we can avoid all the malicious attacks as a whole. In this paper we have demonstrated a proof of concept and feasibility of securing yourself on a network by being anonymous.

Field-Curvature Correction According to the Curvature of a CMOS Image-Sensor Using Air-Gap Optimization

  • Kwon, Jong-Hoon;Rhee, Hyug-Gyo;Ghim, Young-Sik;Lee, Yun-Woo
    • Journal of the Optical Society of Korea
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    • 제19권6호
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    • pp.658-664
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    • 2015
  • Lens designers generally refer to flat image fields and attempt to minimize the field curvature. Present-day CMOS image sensors for mobile phone cameras, however, are not flat, but curved. Sometimes it is necessary to generate an intentional field curvature according to the degree and direction of the CMOS image-sensor’s curvature. This paper presents the degree of curvature of a CMOS image sensor measured using an interferometer, and proposes an effective compensation method that minimizes the net field curvature through optimizing the air gap between lens elements, which is demonstrated using simulations and experiments.

중학생(中學生)의 도시락의 열량(熱量)과 체위(體位)의 발달도(發達度)에 관(關)한 연구(硏究) (A study of the development of physical standard and calorie of the lunches of the middle school boys & girls)

  • 이금영
    • 한국식품영양과학회지
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    • 제6권1호
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    • pp.9-15
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    • 1977
  • 1. Boys and girls in our country are recommended to take 2,400 calorie a day, but the pupils in this school take no more than $500{\sim}600$ calorie from their lunches. They must take 800 calorie a meal. According to the weight ($40{\sim}43kg$, on the average) the necessary calorie a meal is 700. To raise the calorie, the side dish must be reformed from Gimchi or Ggagdugi to protein and fat food. 2. The average distance to the school is not far, but their bags are too heavy (about 5kg). It prevents them from approving their physical constitution. 3. Except the chest of the girls, the degree of the physical development is inferior to that of Kyongkydo, the Development of Education, or that of Japan. In short, the low degree of the physical development is caused by the low calorie and the heavy bags, as shown in Lee & Yonsei.

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부부의 공유여가시간과 결혼만족도 (Shared Leisure Time with Spouses and Marital Satisfaction)

  • 이기영
    • 대한가정학회지
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    • 제33권3호
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    • pp.113-126
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    • 1995
  • The purposes of this study were to investigated ; 1) The amount of shared leisure time with spouses. 20 The differences of the mount of shared leisure time according to socio-demographic variables. 3) The relationship between marital satisfaction and the amount of shared leisure time. Data for 291 couples were gather from using structured questionnaire and time diary. The major findings were ; 1) Spouses spent together 2 hours and 8 minutes on the average per day in leisure. Time for active leisure was 1 hour and 36 minutes, while that for passive leisure was 32 minutes. 2) The total shared leisure time were significantly related to husband's age, degree of husband's education, and employment status of wife. The active shared leisure time were related number of children and husband's age. and the passive shared leisure time were related to degree of husband's education, and employment status of wife. 3) The more couples spent together in leisure, the higher their marital satisfaction became.

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간역열부하계산용(簡易熱負荷計算用) Bin기상(氣象)데이터 (Development of Bin Weather Data for Simplified Energy Calculations)

  • 김두천;최진희
    • 대한설비공학회지:설비저널
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    • 제17권1호
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    • pp.28-43
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    • 1988
  • The purpose of this research is to produce bin weather data for Seoul from Standard Weather Data. The intended use of these data is for input to recently developed models for simplified energy calculations and for generating variable-base degree-day information. The data produced under this study include $3^{\circ}C$ bin data covering the full range of dry-bulb temperatures with mean coincident wet-bulb and daytime coincident solar radiation, wet-bulb bins down to freezing temperature, wind speed bins with prevailing directions, and heating and cooling degree hours to nine different temperature bases. All of these data are tabulated in six separate time periods and total daily categories for monthly and annual periods.

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