• Journal of the Korean Institute of Telematics and Electronics A
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• v.29A no.8
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• pp.78-88
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• 1992

To improve the characteristics of sub$\mu$m short channel MOSFET device, a new device having the convex structure is proposed. This device has 3-dimensionally expandable channel length according to the vertical etched silicon height. For the purpose of comparing the DC and AC characteristics, planar device is also fabricated. Comparing the channel length, the convex device with 0.4$\mu$m silicon height is larger about 0.56$\mu$m in NMOS and 0.78$\mu$m in PMOS than planar devices. DC characteristics, such as threshold voltage, operational current, substrate current and breakdown voltage are compared together with AC characteristics using the ring oscillator inverter delay. Also process and device simulation are performed and the differences between convex and pranaldevice are also compared.

• ETRI Journal
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• v.18 no.4
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• pp.245-264
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• 1997

This paper presents a formalism-based methodology and its implemented environment which constitutes a sound framework for real-time systems development. The software and/or hardware systems developed in such a formal manner are well structured and maintainable. We first propose a set-theoretic VSSS (Variable Structure System Specification) formalism. This formalism is the core of the presented methodology which supports a means of formal specification for real-time systems. We then develop the environment, including VSSS language definition, a translator for the language, and supporting libraries for real-time execution. Finally, a demonstration of the methodology in development of a real-time event manager, a subsystem of an ATM-based communication system, shows the correctness and efficiency of the methodology.

• ETRI Journal
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• v.28 no.6
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• pp.807-810
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• 2006

This letter presents a prediction model for sentence-final intonations for Korean conversational-style text-to-speech systems in which we introduce the linguistic feature of 'modality' as a new parameter. Based on their function and meaning, we classify tonal forms in speech data into tone types meaningful for speech synthesis and use the result of this classification to build our prediction model using a tree structured classification algorithm. In order to show that modality is more effective for the prediction model than features such as sentence type or speech act, an experiment is performed on a test set of 970 utterances with a training set of 3,883 utterances. The results show that modality makes a higher contribution to the determination of sentence-final intonation than sentence type or speech act, and that prediction accuracy improves up to 25% when the feature of modality is introduced.

• Journal of East-West Nursing Research
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• v.17 no.2
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• pp.132-138
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• 2011

Purpose: The purpose of this study was to explore the relationship among suicidal ideation, parental attachment, and self-identity of college students. Methods: This study was designed as a descriptive correlational research. The participants were 314 college students in Gyeongbuk province. Data were collected from September 23 to Oct 5 in 2009 using a structured questionnaire. Data were analyzed by t-test, ANOVA, and Pearson correlation coefficient using SPSS WIN (Version 12.0). Results: Suicidal ideation showed negative correlations with maternal and paternal attachment (r=-.20, p<.001; r=-.24, p<.001, respectively) as well as self-identity (r=-.37, p<.001). Self-identity had positive correlations with maternal and attachment (r=.16, p=.006; r=.23, p<.001, respectively). Conclusion: The findings suggest that suicidal ideation may be decreased when college students have higher parental attachment and self-identity. Strategies to improve parental attachment and self-identity are needed in near future.

• Proceedings of the Korean Association of Geographic Inforamtion Studies Conference
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• 2009.04a
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• pp.269-270
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• 2009

This study builds a sediment rating curve using the measured sediment yield and the simulated soil erosion by a GIS-embedded empirical model. Then the structured sediment rating curve is used to determine the SDR on a basin scale in southern Korea. The whole data(year of 2002-2008) are divided into two groups and the first group(year of 2002-2005) is used for calibration, while the other is used for validation. Two cases(rainfall amount and rainfall intensity) are analyzed to consider the rainfall runoff erosivity factor in simulating soil erosion. The results show the derived SDR provides reasonable accuracy and rainfall intensity gives better performance in calculating soil erosion than rainfall amount.

• Journal of Family Resource Management and Policy Review
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• v.18 no.3
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• pp.21-40
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• 2014

This qualitative study focused on the motives and patterns of child care leave by analyzing its facilitating and constraining factors. Fourteen participants were interviewed in-depth using non-structured interview questions. Motives for child care leave include mothers' active choice, mothers' inevitable secondary choice, and mothers' instrumental choice. The patterns of child care leave in terms of total period, time, and distribution vary according to individual circumstances and occupational culture surrounding child care leave for female workers. Female workers will occasionally use this child care leave as a rare opportunity to take a rest during their labor lifecycle and to achieve work-family balance.

• Journal of the Korean Home Economics Association
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• v.32 no.5
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• pp.83-96
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• 1994

The purpose of this study was to investigate parental strain satisfaction and division of child-care tasks after the transition to parenthood. For this purpose, the empirical sample testing was conducted using structured questionnaires with 62 couples who had a 3-month-old baby. The major findings 1) In general wive's child-care task was higher than husbands' 2) Wives experienced more parental strain and less satisfaction than husbands. 3) Parental strain satisfaction and division of child-care tasks were found independent of the wife's employment status. 4) For wives marital adjustment after the transition to parenthood was associated with satisfaction and division of child-care tasks.

• Journal of the Korean Home Economics Association
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• v.32 no.1
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• pp.75-92
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• 1994

This study attemped to identify the desirable early childhood education and investigate the current situation of the child care centers. The survey was conducted by means of interviews or mailing method using the structured questionnaire. The sample size was 176 teachers in child care centers in Pusan. The questionnaire was built on previous studies and bibliographies. The results were as follows; (1) Most of the teachers were unqualified and under 30 years of age. (2) The facilities and the equipments in the child care centers were insufficient for children's development. (3)The nutritional knowledge of the teachers were far short and the emergency discipline was seldom carried out. (4) No additional efforts were made for the parent -education. It is required to increase the facilities & the equipments for children's development. It appears that re-education of teachers must be carried out in a near future prior to child educaion.

• Journal of the Korean Home Economics Association
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• v.38 no.8
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• pp.1-11
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• 2000

The purpose of the study was to investigate the relationship among management strategic type, QR system adoption and the usage level of technologies. Also the current situation about the management strategies for the Korean apparel manufacturers was examined in this study. A random sample of 102 apparel manufacturers was selected for the data collection. A survey method was used with the structured questionnaire, and for the data analysis, chi-square test, ANOVA and Duncan's multiple range tests were used. The resets were as following: 1. The most identified strategic type among Korean apparel manufacturers was analyzer and the defender. 2. The most frequently used technologies were small lot orders and the reduction in the inventory level, and the least used technologies were the electronic order system and UPS. 3. The management strategic type was significantly related to the adoption and the usage level of technologies.

• International Journal of Human Ecology
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• v.8 no.2
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• pp.75-83
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• 2007

Korean secondary school students (n=263) responded to surveys measuring their family contexts and school adjustment during the time period August-September 2004. Structure Equation Modeling tests were conducted to identify the nested model on school adjustment, a latent variable constructed with peer relations, teacher-adolescent relations, and academic attitude. In the nested model, parental involvement was a powerful predictor for school adjustment. Family conflict had a negative impact on school adjustment and was statistically significantly when correlated with the other predictors in the model. These finding suggested that family contexts play an important role in Korean adolescents' school adjustment. Hence, adolescents' perceived GPA level and satisfaction for school were important predictors for school adjustment.