• Proceedings of the Korean Geotechical Society Conference
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• 2009.09a
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• pp.605-621
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• 2009

대심도 암반을 굴착함에 따라 암석강도 및 암반응력 등의 특성에 따라 Rockburst 등과 같은 취성파괴 및 Squeezing 등과 거동을 나타낼 수 있으며, 이러한 대심도 암반거동은 터널 및 지하 공동 시공중 위험요소로 작용하여 안정성에 심각한 영향을 줄 수 있다. 따라서 대심도 암반구간에 터널을 건설하는 경우에는 합리적인 설계 및 시공을 달성하기 위해서는 대심도 암반에 대한 지질 및 암반특성을 정확히 이해하는 것이 필요하며, 대심도 암반특성에 적합한 보강 및 시공대책을 수립하도록 하여야 한다. 본 고에서는 대심도 암반구간에서의 위험도 평가 및 터널 설계사례를 검토하여, 대심도 암반특성을 고려한 터널구조물 설계시 합리적인 방안을 도출하고자 하였다.

• Proceedings of the Korean Society of Machine Tool Engineers Conference
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• 2002.10a
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• pp.329-334
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• 2002

High-speed machining is one of the most effective technology to improve productivity. Because of the high speed and high feed rate, high-speed machining can give great advantages for the machining of dies and molds. This paper describes on the improvement of machining accuracy in high-speed machining. Depth of cut, feed rate, spindle revolution and cutting force are control factors. The effect of the control factors on machining accuracy is discussed for the results of surface roughness and machining error in Z-direction for the high speed machining of STD11.

• Journal of East-West Nursing Research
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• v.21 no.2
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• pp.94-102
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• 2015

Purpose: This study aimed to explore elderly women's experience and meaning of Dan Jeon Breathing. Methods: Ten elderly women who have practiced Dan Jeon Breathing over 3 months participated in this study. Data were collected through in-depth interviews from participants from May 2012 to January 2013. Data were analyzed with a phenomenological method outlined by Colaizzi (1978). Results: A total of 153 significant statements were extracted from the data resulting in nine themes and five theme clusters. Theme clusters were: "mind-body intervention for old age", "a happy life in old age", "getting better with great efforts", "did not meet their expectations", and "delay at aging process". Conclusion: This study provides us with an understanding on process of elderly women's experiences practicing Dan Jeon Breathing in maintaining and promoting health. Therefore, it is recommended for elderly women who want to maintain health and longevity perform Dan Jeon Breathing as a mind-body nursing intervention.

• Korean Parent-Child Health Journal
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• v.9 no.1
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• pp.17-32
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• 2006

The purpose of this study was to understand mother's experience of caring child with a severe atopic dermatitis. Twelve participants were selected and collected on their caring difficulties using in-depth interview. Data were analyzed according to the method of Colaizzi. Significant statements were extracted from the data. From the significant statement, 18 clusters of themes and 7 categories were emerged. Eighteen cluster of themes formed 7 categories : Thinking of atopic dermatitis during 24 hour, Mom would cure you, You are atopic, I'm depressive, I need 12 or more bodies to take care of him/her, Great conversion of daily life, From a bitterness to a frailness, In peace with an atopic dermatitis. In this study, it was implicated that mothers were suffered from caring children with an atopic dermatitis and nurses need to have more interests in the maternal stress and their quality of life as well as provision of information.

• Industrial Engineering and Management Systems
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• v.1 no.1
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• pp.46-57
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• 2002

The purpose of this paper is to show general steps of developing better measures for the survey questionnaire. The steps introduced can be adopted by researchers in disciplines such as management, psychology, behavioral science, etc. As an exemplary case, the customer-supplier relationship is used to show suggested steps in great detail. Several suggested steps and techniques are selected after carefully reviewing the works of previous researchers such as Churchill (1979), DeVellis (1993), Dunn et al. (1994), Hayes (1994),which are explained in depth in the following sections, are: (1) specify domain of construct, (2) generate sample of items, (3) pilot study, (4) data collection, (5) assess reliability and validity.

• International Journal of Industrial Entomology and Biomaterials
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• v.29 no.1
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• pp.93-119
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• 2014

Tropical tasar silkworm, Antheraea mylitta (Lepidoptera: Saturniidae) is a polyphagous silk producing forest silkworm of commercial importance in India. Forest dependent people rear its larvae on different forestry host plants twice or thrice in a year for small household income. Larvae of A. mylitta feeds on many forest tree species, but always show a great degree of selectivity as a function of its behavioural responses to physical structure and chemical features of the host plants. Cocoon crop of A. mylitta is influenced by heterogeneity of tasar food plants and climatic conditions of the habitat. The role of host plants, temperature, humidity, rainfall, photoperiod and climatic variables on the growth and development of insects have clearly been demonstrated. This article entails an in-depth analysis on ecological and nutritional aspects of A. mylitta, which may provide selective information to researcher and forest managers, who are particularly associated with livelihood improvement of the poor people in forested area through location specific forest insect industry.

• Transactions of Materials Processing
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• v.14 no.6 s.78
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• pp.541-546
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• 2005

Apparent mechanical properties in structural components can be different from the initially designed values due to the formation of the residual stress in metal forming and welding. Therefore, the evaluation of residual stress has great importance in the reliability diagnosis of structural components. A nondestructive continuous indentation technique has been proposed to evaluate various strength concerning mechanical properties from the analysis of load-depth curve. In this study, quantitative residual stress estimation on API X65 welded joints for natural gas pipeline was performed by analyzing the variation of indentation loading curve by residual stress through a new proposed theoretical model. The residual stress from the indentation method was compared with that from the saw-cutting method.

• Proceedings of the Korean Society for Technology of Plasticity Conference
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• 2005.05a
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• pp.126-129
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• 2005

Apparent mechanical properties in structural components can be different from the initially designed values due to the formation of the residual stress in metal forming and welding. Therefore, the evaluation of residual stress has great importance in the reliability diagnosis of structural components. A nondestructive continuous indentation technique has been proposed to evaluate various strength concerning mechanical properties from the analysis of load-depth curve. In this study, quantitative residual stress estimation on API X65 welded joints for natural gas pipeline was performed by analyzing the variation of indentation loading curve by residual stress through a new proposed theoretical model. The residual stress from the indentation method was compared with that from the saw-cutting method.

• Journal of the Korean Society for Precision Engineering
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• v.22 no.5 s.170
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• pp.167-174
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• 2005

High-speed machining is one of the most effective technologies to improve productivity Because of the high speed and high feed rate, high-speed machining can give great advantages for the machining of dies and molds. This paper describes on the analysis and evaluation of cutting force in high-speed machining. Cutter rotation directions, slope directions, spindle revolution and depth of cut are control factors for cutting force. The effect of the control factors on cutting force is investigated for the high speed machining of STD11.

• Proceedings of the Korea Water Resources Association Conference
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• 2016.05a
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• pp.191-191
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• 2016

Hai River Basin is one of China's major agricultural areas, with a huge rural population. Water conservancy is of great importance in this region. There are three integral elements in managing rural water resources: the consideration of current situation, the adoption of effective management measures, and the projection of future needs. In this study, we provide an in-depth investigation of current water resources situation of Hai River Basin. Five issues are analyzed: (1) the construction of conservancy projects; (2) the irrigation of farmland; (3)the safety of drinking water; (4)the protection of water environment; and (5)the model of management practice. Existing problems are diagnosed and possible solutions are discussed. Finally, a summary is made for managing water resources and meeting future needs.