• 한국의류학회지
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• 제39권5호
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• pp.745-754
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• 2015

This study analyzed Korean middle-aged men's fashionable styles according to ageless trends as their representative characteristic and deriving their special features from men's magazines. Literature and case studies were conducted together. The research findings are as follows. First, it showed uniformity, conformity, passive clothing selection and consumption in 1990s as characteristics of middle-aged men's wear by period. However, clothing became an expressive way to pursue individuality and an ageless trend gradually, and middle-aged men positioned themselves as subjects of a consumer market for men's wear after 2010 through active clothing selection and consumption. Second, along with a trend change preferring a comfortable and active to formal atmosphere, it showed that casual style became diversified and segmented gradually in Korean middle-aged men's ageless trend and fashionable style. Third, as for formative characteristic changes in middle-aged men's fashionable style by period, it contained a slim silhouette, bright and splendid colors and patterns, increase of light, active and functional materials, generalization of casual items and pursuit of individuality by various mix & match styles. Fourth, in Korean men's ageless trend and changing fashionable style, four kinds of special characteristics were derived that included a change of the traditional clothing symbolism, weakened conformity & pursuit of personality, obscured boundaries between age and wearing style, and active embracing of a trend.

• 교육시설 논문지
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• 제22권1호
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• pp.47-57
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• 2015

This study aimed to identify secondary school students' perceptions of school spaces by researching their place preferences and the reasons for them. For the purpose, we analyzed students' written statements regarding places they like and dislike at school, which were collected from 836 middle and 1,100 high school students enrolled at 4 middle and 4 high schools, respectively. Data were transcribed, encoded, and analyzed so as to be clustered to themes revealing the students' senses of places at school. The results are as follows: (1) for middle school students, the most preferred places had to do with physical activities, including playground, auditorium, gymnasium etc., whereas high school students preferred indoor places such as classrooms; (2) the reasons for like-places were categorized into three themes: functions (physical, social, learning, and everyday activities), emotions (belonging, healing, and aesthetics), and physical characteristics; (3) both middle and high school students regarded restroom as the place that they disliked most; (4) the reasons for dislike-places included physical conditions, atmosphere, person-related, subject-related, and circumstances such as the happening of violence or punishment. These may provide educators, parents, school architects and administrators with practical considerations needed for making school a better place for students at secondary schools.

• 교육시설 논문지
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• 제20권6호
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• pp.49-56
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• 2013

This study investigated middle school students' perceptions of an optimum class size as well as the relationships between a class size and various aspects of students' lives at school. Data were gathered from 858 students from 8 classes (grade 1 and 2) at 4 middle schools located in Busan by administering survey questionnaires. The average class sizes to which each participating students belonged were 17.88, 30.0, 31.88, 28.0 respectively. A series of comparative analyses were carried out, revealing that the majority of the participating students perceived 25-30 as an optimum size for one class. Also, students in a relatively smaller class tended to show higher levels of satisfaction with school lives and with school and classroom facilities, more positive attitudes towards classroom atmosphere, and greater needs for peer interaction than did their counterparts. Furthermore, it was found out that the actual class size had to do with the students' perceptions of the relationships between school facilities and their levels of stress and pleasure at school. These findings were discussed in order to provide educators, architects, and policy makers with practical implications for bringing about a better school environment that is conducive to learning and living for middle school students.

• Bulletin of the Korean Chemical Society
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• 제25권5호
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• pp.620-624
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• 2004

Optical emission studies were performed to investigate thermal and dynamical properties of a plume produced by laser ablation of a graphite target in a nitrogen atmosphere. Experimental spectra of $C_2(d^3{\Pi}_g{\to}a^3{\Pi}_u$, ${\Delta}_V$=1) and CN ($B^2{\Sigma}^+{\to}X^2{\Sigma}^+,{\Delta}_V=0)$ were simulated to obtain the vibrational and rotational temperatures of the electronically excited species at various laser fluences and distances from the target. The spectroscopic temperatures of both molecules were found to be nearly independent of the laser fluence. The temperature of CN molecules was peaked in the middle of the plume while that of $C_2$decreased with increase in the distance. At a given distance, the temperature of CN molecules was clearly higher than that of $C_2$.

• 한국환경교육학회지:환경교육
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• 제19권2호
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• pp.122-132
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• 2006

This research compared the mechanism of the greenhouse effect in the atmosphere with retaining warmth in the actual greenhouse, analyzed the styles of explaining the greenhouse effect in current textbooks, and investigated teachers' and students' degrees of understanding the effect. The mechanisms of the actual greenhouse and the greenhouse effect are not the same. Nevertheless, in all the current textbooks, the radiation phenomenon by the atmosphere is described as the 'greenhouse effect'. Using the words of the 'greenhouse effect' to refer to the effect of air being kept warm by the heat absorbing gases, causes confusion of concepts. To make learners understand the greenhouse effect exactly, concrete principles such as radiating electromagnetic phenomenon should be explained. However, teachers and current textbooks explained the radiating electromagnetic phenomenon as actual greenhouse. Therefore, it is difficult for learners to understand the greenhouse effect, scientifically. Because of this, learners maybe confused about greenhouse effect concepts.

• 한국대기환경학회지
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• 제21권4호
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• pp.413-422
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• 2005

The ozone concentration measured by HALOE (Ver 19) from Oct. 1991 to Dec. 2003 is used for analyzing the variation of ozone concentration. The HALOE loaded in UARS is observing several gases in the atmosphere, from 10km to 80km. Fourier analysis of these data in the middle latitude northern hemisphere is reported in this paper. To detect any possible long term trends, the fourier transformed time series was back transformed after removing signals with time periods of less than 6 months. Although the results clearly show the strong annual cycle, it is difficult to show any long term trends from the fourier series. We also compared the ozone volume mixing ratio's from HALOE with that from the ground-based radiometry to evaluate the accuracy of microwave observation at Sookmyung Women's University.

• International Journal of Advanced Culture Technology
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• 제6권4호
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• pp.131-142
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• 2018

This research examines the impact of teachers' self-evaluation on their classroom interactions with students. Changes in class behavior were analyzed by following two experienced middle school teachers for one semester of self-evaluation, comparing their classes at the beginning and end of the semester. A qualitative research method was adopted to take, a deeper look at the effect of changes in the teachers' in class actions. Both of the teachers reported positive effects of implementing self-evaluation on their teaching pedagogy, focusing specifically on their interactions with students when asking question and giving feedback. By the end of semester, they were asking broader questions that encouraged their students to engage in deeper thought and, when giving feedback, the class atmosphere was much brighter with better communication due to the positive reinforcement provided. This research supports research into ways to enhance teachers' expertise and improve their teaching via self-evaluation, centering on teachers' actions in the classroom.

• 한국지구과학회지
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• 제30권5호
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• pp.630-645
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• 2009

The tropopause fold event that took place on January 1, 1997 over mid-region on the Korean Peninsula is examined by means of a numerical simulation based on a Mesoscale Model (MM5). The purpose of this paper is to investigate the effects of moisture in reinforcing a tropopause fold linked to an explosive cyclone. Two types of simulations were carried out; 1) simulations for moist conditions in which full physical and dynamic processes are considered and 2) simulations for dry conditions in which cumulus parameterization and cloud microphysics process are excluded. The results of the moist condition simulations demonstrate that the intensity of the central pressure of the cyclone was overestimated compared with the observed values and that the location of the center and the pressure deepening rates (-17 hPa/12 hr) complied with the observed values. The potential vorticity (PV) anomaly on the isentropic surface at 305 K continued to move in a southeast direction on January 1, 1997 and thus created a single tube of tropopause fold covering the northern and the middle area of the Korean Peninsula and reaching the ground surface at 0300 UTC and 0600 UTC. The results of the dry condition simulations show that the tropopause descended to 500 and 670 hPa in 0300 and 0600 UTC, respectively at the same location for the moist condition simulation; however, there was no deep tropopause fold observed. A comparison of the simulated data between the moist and the dry conditions suggests that a deep tropopause fold should happen when there is sufficient moist in the atmosphere and significantly large PV in the lower atmosphere pulls down the upper atmosphere rather than when the tropopause descends itself due to dynamic causes. Thus, it is estimated that moisture in the atmosphere should have played a crucial role in a deep tropopause fold process.

• 한국안전학회지
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• 제30권6호
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• pp.48-55
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• 2015

A variety of safety issues were investigated for chemical reactors using a toluene solvent in case of a fire at small to middle scale chemical plants. The issues covered the operation of pressure-relieving valves and the subsequent discharges of the toluene to the atmosphere either directly or through an absorber, which represent the current practice at most small chemical plants. It was shown that the safety valve on the reactor may not operate within about twenty minutes after an external fire breaks out, but, once relieved, the toluene vapor released directly to the atmosphere may form a large explosion range on the ground. It was also shown that if the discharge is routed to an existing absorber used for the scrubbing of volatile organic compounds or dusts, the column may not operate normally due to excessive pressure drops or flooding, resulting in the hazardous release of toluene vapors. This study proposed two ways of alleviating these risks. The first is to ruduce the discharge itself from the safety valve by using adequate insulation and protection covers on the reactor and then introduce it into the circulation water at the bottom of the absorber through a dip linet pipe equipped with a ring-shaped sparger. This will enhance the condensation of toluene vapors with the reduced effluent vapors treated in the packing layers above. The second is to install a separate quench drum to condense the routed toluene vapors more effectively than the existing absorber.

• 한국수학교육학회지시리즈E:수학교육논문집
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• 제26권3호
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• pp.317-338
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• 2012

본 연구는 교사들이 생각하는 좋은 수학 수업을 알아보기 위해 4개의 대영역(교육과정과 교육내용, 교수 학습, 교실환경 및 수업 분위기, 평가)과 48개 하위 요소로 구성된 설문지를 이용하여 초등학교 교사 223명과 중학교 수학 교사 151명의 반응을 비교 분석하였다. 분석 결과 초등 교사는 대영역 중 교육과정과 교육내용 영역을, 중등 교사는 교수 학습 영역을 가장 중요하게 생각하였다. 세부 요소 별로 살펴보면, 초 중등 교사는 공통적으로 자기주도적 학습 능력을 신장시키는 수업, 학생 수준에 맞게 교육과정을 재구성하여 실시한 수업, 학생과 교사간의 상호작용이 잘 이루어지는 수업 등을 좋은 수학 수업이라고 생각하였다. 그러나 초등 교사는 좋은 수학 수업과 관련된 23개 요소에 대해서 중등 교사보다 더 중요하다고 인식하였으며, 중등 교사는 수학적 표현 능력을 신장시키는 수업, 동기 유발이 잘 이루어지는 수업의 2개 요소에 대해서만 초등 교사보다 유의미하게 더 중요하다고 인식하였다. 이러한 연구 결과를 토대로 우리나라 본연의 좋은 수학 수업에 대한 교사의 인식 및 이에 따른 시사점을 논의하였다.