• 한국동물학회:학술대회논문집
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• 한국동물학회 1999년도 한국생물과학협회 학술발표대회
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• pp.308.2-308
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• 1999

No Abstract, See Full Text

• 대한인간공학회지
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• 제21권2호
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• pp.35-46
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• 2002

This study was performed to determine the voluntary range of joint mobility for middle-aged Korean adults. One hundred and eighty-eight subjects(99 males and 89 females) at the age range of 40 to 60 participated for this study. Thirty body movements at various joints were conducted to measure the range of joint mobility. Subjects were grouped by Rohrer's into four based on 25th percentile. The data were analyzed to see the differences of range of joint mobility between sexes and Rohrer's index groups. The results of this study and previous studies were compared to see the differences of range of joint mobility due to the aging. Results of this study indicate that females are generally more flexible than males. Significant differences were found to exist in fourteen movement between sexes and in ten movements, females have larger range of joint mobility than males. There were no significant differences in range of joint mobility may have a tendency to decrease with ages. The results of this study provide important information in dynamic dimensions for middle-aged Korean and can be used to design the various and work places for the middle-aged.

• 정보보호학회논문지
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• 제32권2호
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• pp.155-162
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• 2022

CHES 2020에서 제안된 SITM (See-In-The-Middle) 공격은 차분 분석과 부채널 분석이 조합된 분석 기법의 일종으로 SNR (Signal-to-Noise Ratio)이 낮은 열악한 환경에서도 적용할 수 있다. 이 공격은 부분 1차 또는 고차 마스킹으로 구현된 블록암호를 공격대상으로 하여, 마스킹 되지 않은 중간 라운드의 취약점을 이용한다. 블록암호 PRESENT는 CHES 2007에 제안된 경량 블록암호로, 저전력 환경에서 효율적으로 구현 가능하도록 설계되었다. 본 논문에서는 차분 패턴들을 이용하여 14-라운드 부분 마스킹으로 구현된 PRESENT에 대한 SITM 공격을 제안한다. 기존 공격은 4-라운드 부분 마스킹 구현된 PRESENT에 적용 가능했지만 본 공격은 더 많이 마스킹된 구현에도 유효하며, 이는 PRESENT가 본 공격에 내성을 가지기 위해서는 16-라운드 이상의 부분 마스킹이 필요함을 보인다.

• 대한지구과학교육학회지
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• 제8권3호
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• pp.267-280
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• 2015

The purpose of this study is to identify the conceptions of middle school students and teachers about Visible-Light, Ultra-Violet(UV) and Infrared-Ray(IR). We administered questionnaire 3 teacher and 102 students(48 people of middle school 2nd students and 54 people of middle school 3rd students) who learned by 3 teachers in seoul. From the analysis, it was found that many students and teachers didn't understand the basic principle of UV and IR. Significant number of students belive that it is possible to see objects the absence of visible light. Most students belive that they can see objects in the presence of UV light alone. They think that "Light" is single concept. Teachers were generally more aware of the origin and explanation of UV. But teachers expressed some uncertainties. They tend to think negative effect for UV.

• 대한공간정보학회지
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• 제18권3호
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• pp.29-35
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• 2010

토양유기탄소는 산림의 형성에 도움을 주며, 대기 중의 이산화탄소양을 조절함으로써 지구 온난화에 영향을 미치는 중요한 인자 중 하나이다. 토양에 존재하는 인자의 분포를 정확히 파악하려면 모든 지역에 대해 샘플링을 수행 해야하나 이는 매우 비현실적인 방법이다. 따라서 알맞은 모델을 제작하여 토양유기탄소의 분포를 추정할 수 있다면 그 활용도가 높을 것으로 판단된다. 본 연구에서는 의사결정나무 알고리즘을 이용해 경사 데이터, 경사향 데이터, Digital Elevation Model (DEM), 식생의 형태 데이터로부터 토양유기탄소를 상대적으로 다량 함유하고 있는 환경 인자를 파악할 수 있는 모델을 제작했으며, 정확도 검증은 10 집단 교차 검정을 통해 수행하였다. 이를 위하여 See 5와 Weka 소프트웨어를 이용하였다. See5 소프트웨어의 경우, 토양유기탄소 표층에 대해 식생의 형태에 의해 토양유기탄소량이 결정되는 것으로 나타났으며, 중간층에 대해서는 DEM에 의해 토양유기탄소량이 달라진다는 결론이 도출됐다. 생성된 모델의 정확도는 표층에 대해 70.8%, 중간층에 대해 64.7%인 것으로 나타났다. Weka 소프트웨어의 경우, 토양유기탄소 샘플의 표층에 대해 See5와 동일한 결과가 도출되었지만, 중간층에 대해서는 DEM이나 식생의 형태뿐만 아니라 경사향도 영향을 미친다는 결론이 도출되었다. 생성된 모델의 정확도는 표층에 대해 68.98%, 중간층에 대해 60.65%인 것으로 나타났다. 본 연구는 토양유기탄소량의 파악 및 토양유기탄소 지도 제작에 활용될 수 있을 것으로 사료된다.

• 영어어문교육
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• 제15권4호
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• pp.291-311
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• 2009

The purpose of this study is to investigate the English reading strategies of Korean secondary EFL learners by their personality types. The study was conducted with 112 middle school students and 100 high school students in Korea. The instrument used for personality measurement was the MBTI test. A reading strategy questionnaire was used to see how frequently each reading strategy was used while students read passages in English. The collected data was analyzed using t-test and two-way ANOVA to see the differences between high school and middle school students in terms of personality types. The results of the study demonstrated that there were significant differences in strategies used by the two groups of students and high school students used more reading strategies than middle school students. It was also found that the students exhibited some differences in reading strategy use depending on their personality types, especially between the N(Intuition) and S(Sensing) types. For example, students with N(Intuition) types used more vocabulary-comprehension, guessing, and metacogntive strategies than S(Sensing) types. Pedagogical implications and suggestions for classroom English teachers are discussed based on the results of the current study.

• 한국생명과학회:학술대회논문집
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• 한국생명과학회 2007년도 제48회 학술심포지움 및 추계국제학술대회
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• pp.64.1-64.1
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• 2007

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• 지역사회간호학회지
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• 제32권1호
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• pp.12-23
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• 2021

Purpose: This study explored how and why young and middle-aged adults disclose depressive feelings to others. In particular, we investigated the role of social norms to see whether using mobile instant messaging (MIM) could lower the perceived barriers of emotional disclosure. Furthermore, the motivations of emotional disclosure via MIM were compared between young and middle-aged adults. Methods: A total of 255 Koreans (128 middle-aged people, 127 young adults) participated in an online survey. Pearson's correlation coefficients, paired t-tests, SPSS PROCESS macro, and exploratory factor analysis were used to examine the relationships among the key variables. Results: The perceived social norms were found to be a significant deterrent in disclosing depressive feelings to others. However, there was a significant interaction effect between generations and perceived social norms. Although young adults with low social norm awareness were more likely to disclose depressive feelings via MIM, emotional disclosure among middle-aged adults increased with higher levels of perceived social norms. Also, different motivations were observed. Conclusion: The results confirmed the significant effect of social norms as well as generational differences when using MIM as a channel of emotional disclosure.

• 운동영양학회지
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• 제24권1호
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• pp.9-13
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• 2020

[Purpose] This preliminary study aimed to develop a regression model to estimate the resting metabolic rate (RMR) of young and middle-aged Koreans using various easy-to-measure dependent variables. [Methods] The RMR and the dependent variables for its estimation (e.g. age, height, body mass index, fat-free mass; FFM, fat mass, % body fat, systolic blood pressure, diastolic blood pressure, mean arterial pressure, pulse pressure, and resting heart rate) were measured in 53 young (male n = 18, female n = 16) and middle-aged (male n = 5, female n = 14) healthy adults. Statistical analysis was performed to develop an RMR estimation regression model using the stepwise regression method. [Results] We confirmed that FFM and age were important variables in both the regression models based on the regression coefficients. Mean explanatory power of RMR₁ regression models estimated only by FFM was 66.7% (R²) and 66.0% (adjusted R²), while mean standard errors of estimates (SEE) was 219.85 kcal/day. Additionally, mean explanatory power of RMR₂ regression models developed by FFM and age were 70.0% (R²) and 68.8% (adjusted R²), while the mean SEE was 210.64 kcal/day. There was no significant difference between the measured RMR by the canopy method using a metabolic gas analyzer and the predicted RMR by RMR₁ and RMR₂ equations. [Conclusion] This preliminary study developed a regression model to estimate the RMR of young and middle-age healthy Koreans. The regression model was as follows: RMR₁ = 24.383 × FFM + 634.310, RMR₂ = 23.691 × FFM - 5.745 × age + 852.341.

• 수산해양기술연구
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• 제33권4호
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• pp.360-369
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• 1997

We calculated the residual current forced by buoyancy, wind stress, and tidal stress in the Chinhae Bay using a three-dimensional diagnostic model. The calculated current was also compared with the observation. The flow directs outward from the central area of the Bay in the upper layer, and also forms eddy-shape stucture in the upper and middle layers. The flow of bottom layer shows an opposite pattern compared to those of top and middle layers. The maximum speed was 6.05 em/see (September) and 3.49 cm/sec (November) in the upper layer, and 4.39 cm/sec on both month in the middle layer. The Kinetic energy of November (8.39xlO' W) was larger than that of September (1.24xlO 'W), mainly resulting from larger buoyancy effect in September. In spite of the roughness of the grid size(1 km) and wind date, the calculated flow shows eorrelation(r=0.71) with the observation. We expect that the correlation be increased by increased by adopting the fine grid and the variable coefficients of diffusion and viscosity.