• 한국산림과학회지
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• 제95권4호
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• pp.495-500
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• 2006

자주식 반송기를 이용한 가선집재작업의 안정성을 이론적인 계산과 현장 계측을 통해 검토하였다. 가선집재 시스템의 이론적 안정성 평가의 유용성을 입증하기 위하여 스카이라인의 장력과 근주의 저항력을 측정하여 이론 계산값과 비교평가하였다. 그 결과 측정된 스카이라인의 장력과 계산값이 유사하였으며, 이를 통해 전체적인 안정성 검토가 가능하였다. 또한 근주의 저항력은 근주의 직경과 밀접한 관계가 있으며 근주변의 각도가 $5-10^{\circ}$일 때 가장 큰 저항력을 나타내었으며, 그 이상의 각도에서는 지주목으로서의 기능을 잃어버리는 것으로 판단되었다.

• Journal of Advanced Marine Engineering and Technology
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• 제32권8호
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• pp.1149-1156
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• 2008

The principle of self clamping friction clutch is presented in this paper and the transmitted torque capacity is also calculated. In order to enlarge the friction force, a part of rotating force of driving side is converted to normal force of friction materials by clamping arm. The increased normal force of friction materials assures the large friction force and the transmitted torque capacity of clutch becomes large. The self clamping friction clutch is adopted in the tube type air pressure clutch and the condition of stability is investigated. It is proven that the inclined angle of clamping arm and the friction factor of friction materials are the essential elements in stability and torque capacity of self clamping friction clutch. The transmitted torque capacity of self clamping friction clutch is compared with air pressure clutch. The normal force of friction lining is magnified by 1/(1-k) and the transmitted torque capacity is also magnified with same proportion comparing with air pressure clutch. The larger the friction factor of friction lining, the larger the magnification factor. The longer the clamping arm, the smaller the magnification factor. It must be also noted that the value of k=${\mu}Y/X$ is the criterion of stability. If the value of k=${\mu}Y/X$ is greater than or equal to 1, the self clamping friction clutch is unstable and it can not be used as clutch.

• 가정과삶의질연구
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• 제19권4호
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• pp.211-223
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• 2001

This study analyzed the financial ratio change of self-employed households between 1997 and 1998. The data were drawn from Korean Households Panel Study and utilitze7 descriptive statistics such as frequency, percentile to investigate the differences between two period of time, 1997 and 1998. The sampe size in 1997 was 692 householdsand and 600 households in 1998. The mean of financial asset showed that in 1997, self-employed households had much less in liquidity assets, especially in bank-related income, stock, but had more in real-estate, Gye, and private loan than those in 1998. In cases of debt-owned, the self-employed tended to have more debt in non-bank related and it illustrates that the self-employed may experience the difficulties to access the financial assistance in economic depression. Using guideline of each ratios, for six financial ratios, self-employed could meet less proper level$ in 1998 compared to those in 1997. It proves that the economic crisis affect the stability of income and financial assets of self-employed households and types of financial assets changes because of the stability.

• 아동학회지
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• 제22권4호
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• pp.17-32
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• 2001

The purpose of this study was to explore the developmental patterns of self-concept of pre-adolescents and adolescents by using the longitudinal data originated by the Korean Institute for Research in the Behavioral Sciences (KIRBS). Specifically, using Structural Equation Modeling (SEM), the effects of parents and peer groups on the stability and change of self-concept were examined across a 9-year-period. The subjects were 62 children(29 boys and 33 girls) from the KIRBS longitudinal data. The results showed that, peer relationships revealed consistent effects on children's self-concept from pre-adolescence to mid-adolescence. In particular, this influence was most evident at 7 years of age and at 16 years of age. However, parental influence was almost non-existent for 7-year-olds, equivalent to peer relationships for 10-year-olds, and decreased for 16-year-olds. On the whole, parental and peer influence on self-concept gradually decrease in adolescence. Nevertheless, parental and peer influence continue to maintain a certain level of influence from childhood to adolescence. This study provides an understanding of developmental change and stability in the self-concept of Korean adolescents.

• 디지털융복합연구
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• 제16권2호
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• pp.385-402
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• 2018

본 연구는 인간중심미술치료 프로그램이 성폭력피해 청소년의 정서안정감, 자아탄력성, 자아존중감 향상에 어떤 영향을 미치는가를 사례 연구하였다. 연구대상은 15세 중학교 3학년 여학생으로 성폭력피해 직후 무기력하고 자신감이 결여되어 일상생활에 어려움을 호소하였다. 주1회, 매회기 60분, 총 20회기 인간중심미술치료를 실시하였다. 프로그램의 효과 검증을 위해 심리적 변화(정서안정감, 자아탄력성, 자아존중감)사전-사후 검사 차이를 밝히고자 하였고 연구대상자의 작품 및 행동의 변화를 질적 분석 하였다. 본 프로그램 실시 후 얻어진 결과는 다음과 같다. 첫째, 정서안정감의 사전 110에서 사후 96점으로 변화 되었고 점수는 낮을수록 긍정적 효과이다. 자아탄력성의 사전 63에서 사후 133으로 변화 되었고 점수는 높을수록 긍정적이다. 자아존중감은 사전 16에서 사후 35로 변화 되었고 점수는 높을수록 긍정적이다. 분석결과 본 연구대상자의 정서안정감과 자아탄력성, 자아존중감 향상에 긍정적이었음을 확인할 수 있었다. 둘째, 인간중심미술치료 프로그램은 성폭력피해 청소년의 행동에 긍정적 영향을 주었다. 초기단계에서 연구자와 라포 형성에 성공적이었으며 중기와 종결과정을 통해 내면의 감정을 표출하거나 관계를 탐색하는 일이 가능하였다. 창작활동을 통해 자신의 미래를 탐색할 수 있었다. 그럼에도 불구하고 본 프로그램은 성폭력피해 직후 청소년이 PTSD로 진행되지 않도록 하는데 초점을 두었지만 성폭력 후유증으로 인해 장기적으로 나타날 수 있는 우울, 분노, 무기력감 등을 회복하고 적극적인 삶을 살아낼 수 있도록 추수지도가 필요함을 알 수 있었다.

• 가정과삶의질연구
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• 제22권4호
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• pp.29-41
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• 2004

The patterns of mother-child personality match were investigated in the study. Further, the impact of goodness-of-fit between mother′s and child′s personality on maternal childrearing behaviors, child′s self-esteem, and child′s emotional intelligence was explored. The participants of this study were 1,060 fifth graders and their mothers from four different cities(Seoul. Suwon, Daejon, and Daegu). Six patterns of mother-child personality match were derived through cluster analysis and discriminant analysis. The most harmonious pattern in which maternal childrearing behavior was positive and child′s self-esteem and emotional intelligence were high appeared between mothers and children with high "stability" and "superiority" The least harmonious pattern was shown for the mothers with low "responsibility" and "reflectiveness" and high "dominance′and "sociability", and the children with low "stability" and "superiority".

• 반도체디스플레이기술학회지
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• 제22권1호
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• pp.43-48
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• 2023

This paper discusses the design of 32Mbyte asynchronous nonvolatile memory modules, which includes self-diagnosis and RTC (Real Time Clock) functions to enhance their data stability and reliability. Nonvolatile memory modules can maintain data even in a power-off state, thereby improving the stability and reliability of a system or device. However, due to the possibility of data error due to electrical or physical reasons, additional data loss prevention methods are required. To minimize data error in asynchronous nonvolatile memory modules, this paper proposes the use of voltage monitoring circuits, self-diagnosis, BBT (Bad Block Table), ECC (Error Correction Code), CRC (Cyclic Redundancy Check)32, and data check sum, data recording method using RTC. Prototypes have been produced to confirm correct operation and suggest the possibility of commercialization.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2011년도 제40회 동계학술대회 초록집
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• pp.188-188
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• 2011

Recently, scaling down of ULSI (Ultra Large Scale Integration) circuit of CMOS (Complementary Meta Oxide Semiconductor) based electronic devices, the electronic devices, become much faster and smaller size that are promising property of semiconductor market. However, very narrow interconnect line width has some disadvantages. Deposition of conformal and thin barrier is not easy. And metallization process needs deposition of diffusion barrier and glue layer for EP/ELP deposition. Thus, there is not enough space for copper filling process. In order to get over these negative effects, simple process of copper metallization is important. In this study, Cu-V alloy layer was deposited using of DC/RF magnetron sputter deposition system. Cu-V alloy film was deposited on the plane SiO2/Si bi-layer substrate with smooth surface. Cu-V film's thickness was about 50 nm. Cu-V alloy film deposited at $150^{\circ}C$. XRD, AFM, Hall measurement system, and AES were used to analyze this work. For the barrier formation, annealing temperature was 300, 400, $500^{\circ}C$ (1 hour). Barrier thermal stability was tested by I-V(leakage current) and XRD analysis after 300, 500, $700^{\circ}C$ (12 hour) annealing. With this research, over $500^{\circ}C$ annealed barrier has large leakage current. However vanadium-based diffusion barrier annealed at $400^{\circ}C$ has good thermal stability. Therefore thermal stability of vanadium-based diffusion barrier is desirable for copper interconnection.

• 한국의류학회지
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• 제2권2호
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• pp.217-225
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• 1978

This study investigated the relationship between ego identity within the framework of Erikson's psychosocial theory of ego development and self-perceptions of dressing competence and dressing conformity. The following problems have been investigated in this study. 1. The relationship between ego identity and self-perceptions of dressing competence. 2. The relationships between the subcategories of identity levels and self-perceptions of dressing competence. 3. The relationship between ego identity and self-perceptions of dressing conformity. Data were obtained from 242 freshman and 156 senior college students, who each received an ego identity scale and self-perceptions of dressing competence and dressing conformity scale. The statistical analyses of the obtained data included calculation of the Chi-Square ($X^2$) and Means (M). This study's finding were as follows; 1. A significant positive relationship was found between ego identity level and self-perceptions of dressing competence. 2. Significant relationships were found between most of the subcategories of ego identity level and self-perceptions of dressing competence, the exceptions being stability, uniqueness, sense of self. 3. Significant relationships were not found between ego identity and self-perceptions of dressing conformity but were found to be significantly related uniqueness and self assertiveness on one hand were found to be significantly related to self-perceptions of dressing individuality and stability on the other hand to self-perceptions of dressing conformity.

• Corrosion Science and Technology
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• 제6권1호
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• pp.7-11
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• 2007

In this study, new evaluation method for the stability and corrosion resistance properties of passive films has been suggested by means of observation of self-activation process in open-circuit state and galvanostatic nanoscale reduction test. The experiments were performed for air-formed oxide film in case of plain carbon steel, and for anodically passivated films formed in aqueous sulfuric acid solutions in case of titanium and 304 stainless steel. From these experimental results, we derived two parameters, $i_{0}$ and $q_{0}$, which characterize the self-activation process and the properties of passive film on a stainless steel surface. The parameter $i_{0}$ was defined as the rate of self-activation, and $q_{0}$, the reduced amount of charge during the self-activation process. In conclusion, it is considered that the stability and corrosion resistance of passive metals and alloys can be evaluated quantitatively by three parameters of $\tau_{0}$, $q_{0}$, and $i_{0}$, which easily obtain by means of observing the self-activation process and galvanostatic nanoscale reduction test.