• 한국간호교육학회지
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• 제13권2호
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• pp.257-265
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• 2007

Purpose: This study was done to investigate sexual problem behaviors of high school students in one province, North Cholla. Method: The participants in this research were 951 high school students, grades 1, 2 and 3, chosen at random in big cities, small towns and rural areas of North Cholla Province. Result: The routes for sexual knowledge acquisition were through a peer group or an older member(35.8%), internet(29.8%), classes and the teacher at school(18.8%), multimedia(8.4%) and parents (7.2%). The percentages for domains of sexual problem behaviors were masturbation 36.7%, sexual impulse 35.6%, voyeurism 12.6%, sexual violence 9.6%, transvestism 4.1%, prostitution 3.5%, exhibitionism 3.1%, and pregnancy of a female student 0.6%. Sexual problem behaviors experienced by 30% or more of the students were reported as the experience of the desire to embrace, the desire to kiss, the desire to touch a friend's body of the opposite sex, masturbation and the desire to sleep with a friend of the opposite sex. The biggest sexual problem behaviors for the students were sexual impulses toward friends of the opposite sex and masturbation. These experience rates were higher for boys than for girls(p<.05), higher vocationally than academicly(p<.05), and higher in the largest cities than smaller cities and rural area(p<.05). Conclusion: These findings suggest that systematic programs that focus on a problem solution method should be developed for sexual problem behavior prevention.

• 한국가정과교육학회지
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• 제9권1호
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• pp.145-159
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• 1997

The purpose of this study is to survey middle school students’s awareness of sexuality and relationships with the opposite sex. The students need to have at their disposal basic resources on sexuality education and an established and systematic curriculum. To achieve this result, questionaires were distributed to 640 students who were chosen randomly in three middle schools in Seung-ju Goon and Goo-rye Goon in Chonnam area, 573 questionaries were used for the final analysis. The results were as follows： In the area of awareness of sexuality, male students regarded sex more positively than female students. It also showed that 19.9% or male students and 17.6% of female students were not aware of their virginity. Male students said they felt sexual impulses most when they saw naked women, and secondly, by sex magazines. This indicates students are motivated mostly by outside influences. There is a considerable gap in the degree of sexual knowledge between male and female according to their school year and father’s family education level. However, little difference is seen according to student’s family circumstance, father’s education level. However, little difference is seen according to student’s family circumstance, father’s job, and student’s religion and vise versa. School restrictions were so severs that 48.2% of boys and 47.1% of girls said that schools paid little attention to their needs. The school restricted rather than permitted relationships with opposite sex. Most of the students revealed a dissatisfaction with the school sexuality education program. Because of confucianism, Korean society has a negative attitude towards sexual activity including sexual education in the schools. 56.8% of male students and 81.4% of females students wanted female teachers to be their sexuality education teachers or advisors rather than male teachers, and 44.8% of male students and 51.2% of females students wanted to receive sexuality education in their Home Economics classes. Materials for sexuality education were considered most effective through videos and audio-visuals. As a result, this survey showed that there appeared to be a great need for a sound, effective, and sensitive sexuality education curriculum in the middle schools for teenagers. It should be conducted in such a way that the teenagers will learn about their sexual needs, their gender differences, and understand and know how to conduct themselves in today’s society sexually.

• 한국전기전자재료학회논문지
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• 제22권8호
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• pp.659-664
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• 2009

This paper describes lightning impulse operating duty performance and temperature dependence of series gap type for transmission line arresters. The ageing parameters of lightning arresters are impulse current, moisture ingress, temperature ageing and so on. Especially it is important to estimate the change of electrical characteristics by lightning impulse current. In the discharge withstand test, total energy applied to the ZnO arrester each time is 4/10 ${\mu}s$, 30 kA. and in the operating duty test, the arrester has passed the test if thermal stability is achieved, if the residual voltage measured before and after the test is not changed by more than 5 %, and after the test reveals no evidence of puncture, flashover or cracking of the ZnO block. As a results, the residual voltage was in the range of 17.2${\sim}$20.3 kV and ZnO block bear up against at 2 shot of series impulse current of 30 kA. Also it was so excellent that the mechanical destruction does not occur at the 2 groups of 5 impulses current of 2/20 ${\mu}s$ 10 kA. According to the tests, it is thought that the ZnO arrester shows good stability with impulse current test. and it was found that the ambient temperature is increased resistive leakage current was increased in the range 47.3${\sim}$167.4 ${\mu}A$.

• 복식
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• 제36권
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• pp.25-41
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• 1998

The purpose of this research was to study four impulse buying dimensions and planned buying, marketing stimulus factors in store, buying im-pulse and impulse buying of female consumer. The female consumers were divided into three groups, i.e., college students, housewives and workingwomen. 408 women living in Kyung Nam were selected as respondents by convenience sampling methods. The results of this research can be summarized as follows. 1. The overall impulses were stronger for college students and workingwomen than house-wives. The impulse buying dimensions were different according to the status of women. 2. Buying impulse and impulse buying of clothing were more likely to be for college students and working women than housewives. 3. The display in the store gave the information to the three groups equally. These infor-mations helped to make the impulse buying. 4. The marketing stimulus factors were different according to the status of respondents. Sensitive and aesthetic factors were important for college students and workingwomen, and the utility of clothing were important for house-wives. The color of clothing, the discount of regular price and the low price had the same meanings to the three groups. 5. Impulse buying dimensions were effected by the marketing stimulus factors. 6. The fashionable products, the use of credit card, famous brand, gracious display of clothing and the kind services of salesman were the common factors that stimulate the consumer to buy the clothings. But the color and design of products had more effect on the college students, and the discount of regular price and the utility of clothing were more important for the workingwomen. The color and the utility of clothing were stimulus factors for the housewives.

• Journal of Mechanical Science and Technology
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• 제15권7호
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• pp.1072-1076
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• 2001

A biomechanical study was conducted in this study to investigate if in-line skating wrist guards can effectively reduce the impact forces so as to protect the wrist from fracture. The forearm specimens with and without wrist guards were dropped using a specially designed sled to simulate the impact on the wrist while falling. A force plate was used to measure the total impact force on the dropping weight whereas a load cell was attached to the proximal end of the specimen and used to quantify the impact transmitted through the wrist joint. From the non-destructive tests, mean peak force measured from a force plate showed no difference between the guarded and unguarded groups whereas mean impulse of the guarded group was significantly greater than that of the unguarded group (p<0.01). Comparing the peak force and impulse measured from the load cell, the peak force of the guarded group was significantly less than that of the unguarded group (p<0.001), while the impulse values were similar. When the specimens were dropped from a higher position (2.5ft ve. 1ft), all unguarded specimens had severe wrist fractures whereas fracture was found in three out of 5 guarded specimens. Comparison of mean peak forces and impulses showed as significant difference between the guarded and unguarded groups only in the mean impulse measured from the force plate. These results suggest that the wrist guard may protect the wrist by attenuating the peak force transmitted to radius and ulnar although it may not be effective when the wrist is subjected to an impact sufficiently large to cause fractures.

• Molecular & Cellular Toxicology
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• 제2권2호
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• pp.120-125
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• 2006

Phenytoin is an anti-epileptic. It works by slowing down impulses in the brain that cause seizures. The recent microarray technology enables us to understand possible mechanisms of genes related to compounds which have toxicity in biological system. We have studied that the effect of a compound related to hepatotoxin in vitro system using a rat whole genome microarray. In this study, we have used a rat liver epithelial cell line WB-F344 and phenytoin as a hepatotoxin. WB-F344 was treated with phenytoin for 1 to 24 hours. Total RNA was isolated at times 1, 6 and 24h following treatment of phenytoin, and hybridized to the microarray containing about 22,000 rat genes. After analysis with clustering methods, we have identified a total of 1,455 differentially expressed genes during the time course. Interestingly, about 1,049 genes exhibited differential expression pattern in response to phenytoin in early time. Therefore, the identification of genes associated with phenytoin in early response may give important insights into various toxicogenomic studies in vitro system.

• 한국응용곤충학회지
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• 제33권1호
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• pp.19-25
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• 1994

식물휘발성 물질에 대한 벼멸구 촉각의 반응을 전기 생리학적인 반응을 관찰하였다. 식물휘발성 물질은 일반적으로 곤충이 그들의 먹이나 산란 장소를 찾는데 아주 중요한 요소로 작용하고 있다. 이러한 기주 특이적인 성질을 파악하기 위하여 벼멸구 촉각에 분포하고 있는 화학감각기의 반응을 AC반응을 통하여 기록하였다. 벼멸구의 plaque organ에서 기된 spike 의 모양은 positive-going biphasic형으로 background spike는 초당 1~22개로 다양하였다. 벼멸구 촉각은 실험한 화학물질들에 광범위하게 반응하고 있는 것을 보여주었으며 농도가 높아짐에 따라 더욱 흥분되지만 일정 수준이상의 농도에서는 더 이상 흥분되지 않거나 억제되는 것을 보여주었다. 본 실험에서는 검정된 대부분의 식물 휘발성물질에서 가장 큰 반응을 보인 농도는 단위 용기 안에 100$\mug$의 물질이 있을 때였고, 가장 큰 반응을 보인 화합물은 hexanal 과 acetophenone이었다.

• 복식
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• 제60권5호
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• pp.19-34
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• 2010

This study aims to examine associationistic psychology and psychological operation associated with each color image, then to study the relation between particular colors used in paintings produced by Gogh and Klimt in different times and these painters' psychology in a bid to explore the meaning and role of psychological operation of colors. The findings of the study indicated that red and blue colors represent mainly negative images, while yellow and orange colors represent mainly positive images and psychologies. Specifically, in the case of Gogh, red expresses anxiety, a negative image, yellow symbolizes passion, a major positive image of emotional liberation, dark and thick green and the green involving blue symbolize negative images, emptiness and despair, and blue represents negative images of internal desire conflicts, and screaming. Also, purple used together with white represents anxiety and depression. In the case of Klimt, red represents negative images of anger toward mother and suppressed energy, yellow, an alternative to gold color, symbolizes the positive image of hope, passion, desire and eroticism, the arrangement of strong gold and orange colors represents a color of psychological healing more than a color of hope. As such, colors used in paintings produced by modern Western painters express the physiological conditions, psychological feeling and emotion in life, at the time when the artists produced such works. It was found that colors are yet another language of expressing emotions, and symbolize the psychologies of the artists, indicating that colors have something to do with the painters' experience and emotional impulses.

• 대한의생명과학회지
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• 제21권3호
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• pp.135-143
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• 2015

Electrocardiogram measures the electric impulses generated by the heart during its cycle. Recently genome-wide association studies on electrocardiogram traits revealed many relevant genetic loci. Therefore, these findings need to be validated and investigated to determine the underlying mechanisms using mouse models. Invasive radiotelemetry has been widely used to record the electrocardiogram in mice because it has several advantages over non-invasive measurements. However, radiotelemetry is expensive and requires complicated surgery. On the other hand, a non-invasive method using 3 electrodes (one for earth) for lead II is easy to establish and allows for rapid measurement. In this study, eleven mice were measured with this non-invasive method and no statistical difference among them was found in any ECG measurements. In addition, repeat measurement in the same mouse was performed in 9 sets of experiment and the results indicated that non-invasive method was reliable for reproducibility. Further it was shown that measurements for 1, 5, 10, and 15 minutes were not different so that a short recording such as 5 minutes was enough to estimate the ECG values including heart rate. Further this method was validated by measuring the ECG of Balb/c and FVB that were previously shown to differ in ECG values by radiotelemetry. Significant differences were found in heart rate, PR interval and corrected QT interval between these mouse strains. This study partially proved that non-invasive method also could provide the accuracy and reproducibility. Based on these results, the non-invasive ECG recordings of lead II is recommended as a useful method for quick test in mouse model.

• Earthquakes and Structures
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• 제9권6호
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• pp.1133-1152
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• 2015

A frequency-domain method is developed for evaluating the earthquake input energy to two building structures connected by viscous dampers. It is shown that the earthquake input energies to respective building structures and viscous connecting dampers can be defined as works done by the boundary forces between the subsystems on their corresponding displacements. It is demonstrated that the proposed energy transfer function is very useful for clear understanding of dependence of energy consumption ratios in respective buildings and connecting viscous dampers on their properties. It can be shown that the area of the energy transfer function for the total system is constant regardless of natural period and damping ratio because the constant Fourier amplitude of the input acceleration, relating directly the area of the energy transfer function to the input energy, indicates the Dirac delta function and only an initial velocity (kinetic energy) is given in this case. Owing to the constant area property of the energy transfer functions, the total input energy to the overall system including both buildings and connecting viscous dampers is approximately constant regardless of the quantity of connecting viscous dampers. This property leads to an advantageous feature that, if the energy consumption in the connecting viscous dampers increases, the input energies to the buildings can be reduced drastically. For the worst case analysis, critical excitation problems with respect to the impulse interval for double impulse (simplification of pulse-type impulsive ground motion) and multiple impulses (simplification of long-duration ground motion) are considered and their solutions are provided.