• 반도체디스플레이기술학회지
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• 제18권2호
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• pp.29-31
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• 2019

The ZTO/p-Si thin film was produced and investigated for tunneling phenomena caused by the interface characteristics of the depletion layer. ZTO thin film was deposited and heat treated to produce barrier potentials by the depletion layer. The negative resistance characteristics were shown in the thin film of ZTO heat treated at $100^{\circ}C$, and the insulation properties were the best. Current decreased in the negative voltage direction by nonlinear show key characteristics, and current decreased in tunneling phenomenon by negative resistance in the positive voltage direction. Heat treated at $100^{\circ}C$, the ZTO thin film has increased barrier potential in the areas of the depletion layer and therefore the current has increased rapidly. The current has decreased again as we go beyond the depletion layer. Therefore, tunneling can be seen to make insulation better. In the ZTO thin film heat treated at $70^{\circ}C$ without tunneling, leakage current occurred as current increased at positive voltage. Therefore, tunneling effects by negative resistance were found to enhance insulation properties electrically.

• 대한간호학회지
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• 제28권2호
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• pp.233-243
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• 1998

This study was performed to compare the transcultural differences on perimenstrual discomforts, menstrual attitudes and sex role acceptance between Korean and American college students. The subjects, 2557 nursing students were selected from 13 universities all around Korea, and 4 universities in the eastern, western, and middle areas of the United States. The data were collected using the MDQ (Menstrual Distress Questionnaire by Moos), the MAQ(Menstrual Attitude Questionnaire), and the Sex Role Acceptance Scale, the subjects answered the MDQ for three points (premenstrual, menstrual, intermenstrual based on their recollections) between July, 1996 and April, 1997. The findings are as follows : 1. There were significant differences in the age of menarche, duration of menstruation, and menstrual cycle between the Koreans and the Americans. 2. As for sex role acceptance, Americans more frequently denied the traditional female role than did Koreans. 3. There were significant differences between the two groups on five categories of menstrual attitude (menstruation is a phenomena that weakens women physically and psychologically, menstruation is a bothersome phenomena, menstruation is a natural phenomena, menstruation onset is a predictable phenomena, and menstruation is a phenomena that does not influence womens' behaviors non is expected to). 4. For the menstrual discomfort scores, there were significant differences between the two groups on all six categories of the MDQ(pain, attention deficit, behavioral changes, AMS response, water retention, and negative emotion) for the three points (premenstrual, menstrual, intermenstrual period). 5. The most common complaints for the Korean women were pain during the perimenstrual period and fatigue during the intermenstrual period. In contrast, for the Americans the most common complaint was negative emotions during the perimenstrual period, but less pain than the Koreans, and a similarity to Koreans during the intermenstrual period. 6. Regularity of the menstrual cycle was positively correlated with age of menarche, menstrual cycle, and duration of menstruation. 7 For the interrelationship between of Perimenstrual discomforts, menstrual attitudes, and sex role acceptance, there were significant correlations for both group as follows : First, the MA category "menstruation is a bothering phenomena" was negatively correlated with sex role acceptance, second, the MA category "menstruation is a phenomena that weakens the women physically and psychologically" was positively correlated with the MA category "menstruation onset is a predictable phenomena." For the further research, it is recommended that efficient nursing intervention programs for perimenstrual discomforts, be developed and qualitative research to demonstrate the cultural differences as the feminism view point be done.

• 대한간호학회지
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• 제27권3호
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• pp.588-600
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• 1997

Postpartum depression is one of the most serious problems in maternal health because it affects not only the mother but also her family. Postpartum depression disturbs the maternal-infant interaction and attachment. However, most postpartum depression patients ignore this problem and do not seek treatment. Many clinicians and researchers realiza there is a need to develop a postpartum depression scale. Thus, this study has been designed to development of a postpartum depression scale. Data were collected through a survey over a period of three months. Subjects who participated in the study were 167 Korean mothers in their postpartum period. The author used a convenience sampling method. The analysis of the data was done with SPSS PC/sup ＋/ for descriptive statistics, item analysis and factor analysis. Initially 62 items were generated from the interview data of eight postpartum depression patients and from a literature review. This preliminary scale was analyzed for reliability and validity. The results of this analysis are as follows. 1. Initially 62 items were analyzed through the Index of Content Validity(CVI) and 48 items were selected. 2. Seven factors were extracted through the principal component analysis, and these contributed 61% of the variance in the total score. Finally 46 items in the scale loaded .41∼ .84 on one of seven factors. 3. Each factor was labeled. Factor 1 was labeled 'emotional phenomena-emotional upset' and included 13 items, factor 2 was labeled' cognitive phenomena-self concept disturbance' and included seven items, factor 3 was labeled 'relationship to baby-negative feeling' and included six items, factor 4 was labeled 'relationship to baby- overload' and included eight items, factor 5 was labeled 'negative maternal identity' and included five items, factor 6 was labeled 'biophysiological phenomena-disturbance of physical functioning' and included four items, and factor 7 was labeled' interpersonal relationship phenomena-blamed others' and included three items. 4. Cronbach Coefficient Alpha for internal consistency was .95 for the total 46 items. Finally, the author suggests that this scale could be adequately applied in assessing the postpartum depression of mothers during the postpartum period. The results of this study can contribute to designing an appropriate postpartum depression prevention strategy.

• 대한전자공학회논문지
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• 제10권2호
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• pp.7-15
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• 1973

전압제어형 부성저항소자를 사용하여 말티바이브레이터를 설계할 경우의 안정점 설정과 회로동작 안정성에 관하여 논한다. 즉 직류적으로 한개 혹은 두개의 안정점을 가지도록 설계된 회로가 일시적 흑은 영구적 발진을 일으키는 현상에 대하여 아나로그 계산기의 모의에 의하여 해석하고, 실험적으로 확인함으로써, 부성저항스윗칭회로 설계상의 유의점을 제시한다.

• 산업기술연구
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• 제14권
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• pp.63-75
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• 1994

The objective of this research is to analyze the phenomena of negative ion behavior in silane plasma chemical vapor deposition. Based on the plasma chemistry, the model equations for the formation and transport of negative ions were proposed and solved. The evolutions of gaseous species along the reactor were presented for several conditions of process variables such as reactor pressure, total gas flow rate, and electric field. Based on the model results, it is found that : (1) The concentration profiles of positive ions show the sharp peaks at the center of plasma reactor. (2) Most of negative ions are located in bulk plasma region, because the negative ions are excluded from the sheath region by electrostatic repulsion.

• 한국태양에너지학회 논문집
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• 제28권1호
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• pp.25-32
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• 2008

Aeroelastic phenomena of a wind turbine include stall-induced vibrations and classical flutters. The classical flutter occurs due to coalescence between bending mode and torsion mode. It is typically the aeroelastic instability of an aircraft wing. Different from the classical flutter, the stall-induced vibration is the instability in lead-lag mode due to negative aerodynamic dampings. In the present study, the three degree of freedom aeroelastic model of a wind turbine blade is introduced to characterize and analyze its aeroelastic phenomena. The numerical results show that the aeroelastic stability of flap-lag motion is more unstable than that of flap-pitch motion and the aeroelastic characteristics of lead-lag motion can become unstable as wind speed increases.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2001년도 하계종합학술대회 논문집(2)
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• pp.243-246
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• 2001

At atmosphere photoluminescence(PL) of porous silicon(PSi) decreases and peak wave number of PL is shifted to blue region. When PS is used light detector, the ageing effects are negative phenomena. For controling ageing effects, this paper uses Polymers.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1998년도 하계학술대회 논문집 E
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• pp.1598-1600
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• 1998

When dielectric surface electric field exceed any electric field strength on air, corona discharge is occurred from the dielectric surface. This paper presents corona discharge phenomena on the dielectric in high field were studied under application of ${\pm}DC$ voltage, constitute of the point to plane 20mm gap. The results obtained in experimental are summarized as follow :(1) Corona pulse is appeared periodically after first corona pulse is occurred and the number of corona pulse increases with the instantaneous applied voltage but peak value is not changed greatly.(2)Applied voltage to beccrite and characteristics and peak value of current are almost a straight line. That kind of tendency accorded with characteristics of beccrite resistance.(3)In case of Positive corona, Positive streamers, were progressed greatly to plane electrodes but In case of negative corona, negative streamers smaller than that of Positive corona.

• Advances in materials Research
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• 제4권2호
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• pp.113-132
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• 2015

The phenomena of high-voltage polarization and conductivity in oriented vinylidenefluoride and tetrafluoroethylene copolymer films have been investigated. It was shown that under certain electric fields, injection of carriers from the material of electrodes appears The barrier for holes injection in the copolymer was found to be lower than that for electrons. It results in more effective screening of the external field near the anode than near cathode. Electrones, ejected from cathode, creating negative charge by trapping on the surface. It is shown that the electrons injected from cathodes create a negative homocharge on the copolymer surface and then become captured on the surface shallow traps. Their nature has been studied by the x-ray photoelectron spectroscopy. It was shown that these traps may consist of chemical defects in the form of new functional groups formed by reactions of surface macromolecules with sputtered atoms of aluminum. The asymmetric shape of hysteresis curves was explained by the difference in mobility of injected holes and electrons. These factors caused appearance of "non-closed" hysteresis curves for fluorine-containing polymer ferroelectrics. Hysteresis phenomena observed at low electric fields (below coercive ones) are to associate with the behavior of the domains localized in the ordered regions formed during secondary crystallization of copolymers.

• 비교문화연구
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• 제27권
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• pp.471-496
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• 2012

Since Takeo Toi's discussion in The Anatomy of Dependence (1973), the concept of amae has generated considerable interest in the fields of psychology, anthropology, communication and other fields. However, there have been few agreements on the definition and functions of amae (Behrens, 2004). Furthermore, it has rarely drawn interest from linguists in general and has rarely been discussed in the context of social interaction. This study aims to examine the concept of amae in Japanese and the corresponding phenomena in Korean, and attempts to explore the similarities and differences between them. The prototype of the amae relationship is the mother-infant relationship (Doi,1973). Even an adult can assume the role of a baby, showing his or her need for dependence on others and expecting to be accepted. It turns out that amae-like phenomena frequently occur in everyday life in Korea as well (Lee, 1982). There is no single term for the concept, but it can be translated in many different ways in Korean, for example, aykyo, ayang, ungsek, erikwang, etc. It can have either positive or negative connotations depending on the situation. It seems that the psychological system that causes dependent behaviors such as ungsek in Korea is cheong, one of the key terms characterizing the Korean culture. Cheong, like amae, starts in the mother-infant relationship extending to familial and to other relationships. A corpus-based analysis shows that cheong is conceptualized as gluing people together, growing over time, and also potentially fatal because it assumes illogical, uncalculated, and personal relationships. In conclusion, unlike some Japanese scholars' claim that amae is the Japanese concept that exists only in Japan, it seems that similar phenomena do exist in Korea as well, but that Korean has no single term corresponding to amae in Japanese. It seems that cheong can be posited in Korean as the inner emotional system that makes amae-like behaviors possible, and that there is not single term, but many, designating the behaviors, possibly because the behaviors have a negative connotation and are not encouraged in Korean society.