• Earthquakes and Structures
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• v.4 no.6
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• pp.607-627
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• 2013

The application of shape memory alloys (SMAs) to the seismic response reduction of civil engineering structures has attracted growing interest due to their self-centering feature and excellent fatigue performance. The loading rate dependence of SMAs raises a concern in the seismic analysis of SMA-based devices. However, the implementation of micromechanics-based strain-rate-dependent constitutive models in structural analysis software is rather complicated and computationally demanding. This paper investigates the feasibility of replacing complex rate-dependent models with rate-independent constitutive models for superelastic SMA elements in seismic time-history analysis. Three uniaxial constitutive models for superelastic SMAs, including one rate-dependent thermomechanical model and two rate-independent phenomenological models, are considered in this comparative study. The pros and cons of the three nonlinear constitutive models are also discussed. A parametric study of single-degree-of-freedom systems with different initial periods and strength reduction factors is conducted to examine the effect of the three constitutive models on seismic simulations. Additionally, nonlinear time-history analyses of a three-story prototype steel frame building with special SMA-based damping braces are performed. Two suites of seismic records that correspond to frequent and design basis earthquakes are used as base excitations in the seismic analyses of steel-braced frames. The results of this study show that the rate-independent constitutive models, with their parameters properly tuned to dynamic test data, are able to predict the seismic responses of structures with SMA-based seismic response modification devices.

• Journal of the Korean Institute of Rural Architecture
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• v.24 no.2
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• pp.1-11
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• 2022

Purpose: The purpose of this study is to analyze image factors of places located in natural and humanistically superior geographical locations. It aims to analyze image recognition and spatiality of scenically historical Sahmyook University, located northeast of Gangneung, through standardization. Method: The analysis method of landscape is composed of data investigation and research, and elements of how students, faculty, and visitors recognize a place's beautiful image will be examined. Result: A phenomenological approach was applied to how the images of beautiful place were set by FGI group meeting, and how such factors affect beautiful place's perception from the user's point of view. When looking at comprehensive ranking of image factors in recognition of beautiful landscapes, factors corresponding to forest landscapes appear at the top rank. In determining factors for its recognition, shared space with natural elements such as water, trees, flowers, etc. has been analyzed to have the biggest influence. Among factors corresponding to urban landscape, 'streets and pedestrian paths' is of medium importance and are recognized for it is artificial structure coexisting with natural elements shared with humans. The image corresponding to 'city area' and 'architecture' was analyzed to have insignificant influence on beautiful places' image recognition for artificial element was prioritized.

• Korean Journal of Child Studies
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• v.26 no.5
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• pp.73-87
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• 2005

To achieve in-depth understanding of the essence of the process of becoming a father, the Colazzi method for analysis of phenomenological and qualitative research was applied to examination of in-depth interviews of 7 fathers in their early twenties and thirties residing in Gwangju City. Interviews were held individually three times during $Oct{\sim}Dec$. 2004. Subjects were first time parents of babies less than 12 months of age. Results were that these first time parents' experience of fatherhood was understood in 37 themes, 13 theme clusters, and 5 categories: "beginning life treated as a father," "witnessing continuous substance of pain," "escape from family-centered life," "the baby seems to recognize me as a father," and "acquiring insight of a father."

• Korean Journal of Adult Nursing
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• v.21 no.6
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• pp.718-732
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• 2009

Purpose: This study was conducted to discover the essence and the structure of the experiences of weight control by nursing students. Methods: Participants were 12 nursing students who had tried losing weight at C university in Busan, Korea. The data were collected from June 17 to August 6, 2006. For the purpose of this study, focus group discussions and in depth interviews were employed. Results: The collected data were analyzed by using Giorgi's method. As the results of the analysis, the following four components of experience were derived: My appearance looked abnorml; Measures for self-realization; Pursuit of my own way only; Feelings of accomplishment and self confidence. Conclusion: It is necessary to develop an effective weight control program with minimized side effects that are harmful to health, based on the components of the nursing students' experiences in weight control that were identified in this study.

• Korean Journal of Adult Nursing
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• v.28 no.3
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• pp.323-333
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• 2016

Purpose: The purpose of this study was to explore the meaning of the experience of adapting to the dietary treatment for hemodialysis patients. Methods: The data were collected through in-depth interviews of ten hemodialysis patients who have been dialyzed for longer than five months. Giorgi's phenomenological method was used for data analysis. Results: The findings included five constituents and 16 sub-constituents. The five constituents concerning diet therapy were: 'suffering', 'undergoing trial and error', 'understanding the need', 'finding alternatives', and 'realizing the meaning of dietary therapy.' Conclusion: The findings contribute to understanding the process of adapting to diet therapy. The results of this study may be utilized in assisting patients to understand the diet therapy process.

• Proceedings of the KSME Conference
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• 2001.06d
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• pp.189-194
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• 2001

A simultaneous visualization of the behavior of bubbles and dry spots has been carried out for pool boiling of R-1l3 on a horizontal heater. From video imaging and image processing analysis, the formation of bubbles and dry spots occurs simultaneously, and therefore they should be considered as a synchronized concept rather than independent identities. The dry spot density is equivalent to the active site density in the region before CHF. At CHF point, large dry areas due to the coalescence of neighboring dry areas cover the heater surface.

• Journal of Korean Academy of Nursing
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• v.32 no.3
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• pp.305-316
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• 2002

This study examined the crisis experiencing by middle - aged women and tried to understand their lived experiences also explored the nature of their crisis. Method: The data was collected from 7 participants living in Incheon and Seoul from Sep. 2000 to Feb. 2001. The analysis of the data was made the phenomenological analytic method suggested by Giorgi. Result: The meanings of the lived experiences of the middle - aged women's crisis ; Impatience about decreased physical function : an attack of a disease, decreased strength, decreased quickness, decreased desire, increased concern of health, poor memory, easy fatigue, change of appearance, change of conjugal relations, sense of loss. Psychological, emotional disturbances : sense of emptiness, regret, sharpness, feeling gloomy, fear of dying, loneliness, feeling the want, loss of confidence. Attitude of active life : reinforcement of self experience, enrichment of understanding, search of self satisfaction, search of self development, development of support system, management of independent life. Envy feeling from relative comparison : feeling of comfort, unsatisfaction to the husband, yearning for youth. Conclusion: Therefore, the program should be developed for the program of physical, psychological, and emotional health and expansion of social role of the middle - aged women.

• The Journal of Korean Academic Society of Nursing Education
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• v.20 no.3
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• pp.362-371
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• 2014

Purpose: The aim of this study was to describe the experiences of student nurses during their clinical practice periods in an alcoholic ward. Methods: A descriptive phenomenological study design was employed. Individual interviews were conducted and audio-taped. Colaizzi's method of data analysis was applied to inductively determine themes and formulated meanings. Data saturation was achieved and methodological rigor was established. Results: Four themes were identified and these themes included anxiety of nursing practice in unfamiliar setting, sympathy with patients, learning about the inpatient alcoholics care, and self-reflection. Conclusion: Nursing students had positive and negative experiences in their clinical practice. The results of this study had important implications regarding clinical practice and research for nursing clinical education.

• Journal of The Korean Society of Integrative Medicine
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• v.2 no.4
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• pp.83-90
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• 2014

Purpose : PBL is a teaching method to learn problem-solving process. Present study was to investigate the predictors of academic achievement when PBL is applied to students of physical therapy. Method : We Performed in-depth interviews and analyzed using the qualitative analysis by randomly assigning 5 of twenty four students who attended the class. Result : The results are classified into two categories and six sub-subjects. Based on two system of classification, PBL showed the learning effect through problem-solving methods because students directly participated in these processes. Also, students need to clearly comprehend communication method and decision-making process in order to progress the class smoothly. Conclusion : Therefore, futher studies will be continuously needed on how we apply PBL to various curriculums of physical therapy.

• Journal of Korean Biological Nursing Science
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• v.14 no.2
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• pp.94-102
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• 2012

Purpose: This study attempted to describe the essential structure of nursing students' experiences as observers of human body dissection. Methods: The research was undertaken as qualitative research. The data was collected through written sources of 169 students majoring in nursing. The analysis of data was made using the phenomenological analytic method suggested by Colaizzi (1978). Results: In this study, five categories of themes emerged. They were: 'unfamiliar wait','standing at the edge of chaos','growth through reflection', 'be immersed in practice', 'winging to be a nurse'. Conclusion: This study will prove helpful not only in understanding nursing students' observation experiences of human body dissection but also in describing their needs for systematic and emotional support.