• Perspectives in Nursing Science
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• 제9권2호
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• pp.83-93
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• 2012

Purpose: The purpose of this study was to describe the post-traumatic stress experiences of firefighters and paramedics. Methods: The participants were 20 fire fighters and paramedics who belong to the Busan Fire Department. Data were collected through in-depth, unstructured audio-taped interviews by the investigator over a six-month period. The participants were asked to describe their post-traumatic stress. The data were analyzed according to Giorgi's method for phenomenological analysis. Results: The interview data were organized by theme into 7 categories that emerged from the analysis. Participants faced various post-traumatic stresses working as fire fighters or paramedics. The categories were suffering from disastrous situations, feeling of fear and helplessness in the face of death, re-experiencing vividly the past traumatic situation, avoiding painful reminders of the trauma, emotional numbing as time passes, suffering from emotional arousal and increased anxiety, and struggling to cope with the post-traumatic stress. Conclusion: This study provides a better understanding of post-traumatic stress experiences from fire fighters and paramedics and the knowledge gained from this study will help in developing appropriate post-traumatic stress management programs.

• Child Health Nursing Research
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• 제12권3호
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• pp.377-385
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• 2006

Purpose: This study was to understand the life experiences of adolescents who were the object of group bullying. Method: Data collection and analysis was done by the Colaizzi method. Data were collected by interviewing the participants and by further follow-up observations. Ten adolescents participated in the study. At that time five of them had already overcome the situation, three were still in a difficult situation and the other two participants were in a temporary absence from school. Results: In the analysis 109 significant statements, 31 themes, 12 clusters of themes and 5 categories emerged. The 5 categories are as follows ; feeling inferiority, not being cared for, loneliness, suffering pain and building a relationship and resignation. The 12 clusters of themes are as follows ; dejection, not being sturdy, mal-function of the family, indifference of the society, loneliness, vexation, suffering, grievance, positive intervention of a support system, exertion, harmonizing and abandonment. Conclusions: The results of this study will help professionals to understand these adolescents. Approaching them from the point of view of the whole man, can also be a practical methode for teaching.

• 한국실내디자인학회논문집
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• 제18권6호
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• pp.12-19
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• 2009

The characteristics of light in the paintings of Rembrandt van Rijn, Johaness Vermeer and Edward Hopper are very different. While Rembrandt and Vermeer lived in the 17th century, Hopper lived in the 20th century. Although this time gap, comparative study on their light-space relationship is important because there are spatial similarities as well as light differences. Most three painters' works depict interior spaces with one person inside. The interior space is filled with different light and shadow. In the Rembrandt's paintings, only part of the figure is lit in the ambiguous darkness. In the Vermeer's paintings, the soft indirect light is filled in the domestic space and the boundary between the figure and space is blurred. In the Hopper's paintings, the direct sunlight invades the interior and the figure confronts with strong daylight. These light differences were caused by the artists' intentions as well as the environmental situations. 4 case paintings of each artist were analyzed by phenomenological aspects and computerized light brightness test. Scale models were built to re-construct the three different light characteristics. The model experimentation will have potential to develop 2 dimensional art analysis into 3 dimensional space design by means of light. However it was very difficult to construct the three lights, the experimentation shows they have unique characteristics that can be applied to spatial design studies.

• Journal of Theoretical and Applied Mechanics
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• 제1권1호
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• pp.97-109
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• 1995

In this paper, a finite viscoelastic continuum model for rubber and its finite element analysis are presented. This finite viscoelatic model based on continuum mechanics is an extended model of Johnson and Wuigley's 1-D model. In this extended model, continuum based kinematic measures are rigorously defied and by using this kinematic measures, elastic stage law and flow rule are introduced. In kinematics, three configuration are introduced. In kinematics, three configuration are introduced. They are reference, current and virtual visco configurations. In elastic state law, it is assumed that at a certain time, there exists an elastic potential which describes the recoverable elastic energy. From this elastic potential, elastic state law is derived. The proposed flow rule is based on phenomenological observation. The flow rule gives precise relaxation response. In finite element approximation, mixed Lagrangian description is used, where total and similar method of updated Lagrangian descriptions are used together. This approach reduces the numerical job and gives simple nonlinear syatem of equations. To satisfy the incompressible condition, penalty-type modified Mooney-Rivlin energy function is adopted. By this method nearly incompressible condition is obtain the virtual visco configuration. For verification, uniaxial stretch tests are simulated for various stretch rates. The simulated results show good agreement with experiments. As a practical experiments. As a preactical example, pressurized rubber plate is simulated. The result shows finite viscoelastic effects clearly.

• 대한간호
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• 제33권2호
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• pp.59-72
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• 1994

This study was conducted to identify an initial clinical experience of nursing students, so to better understanding to students' experience in clinical setting. The study subjects were 39 nursing students working in C department of nursing in C city. This study was approached by phenomenological method, collected data were analyzed by Colaizzi's method. The results were followed. From the protocol, 236 significant statements were organized into 56 formulated meanings. From formulated meanig, 27 themes were identified, organized into 13 theme clusters, and then into 6 categories. Theose nursing students experienced $\mathbb{\ulcorner}$tension$\mathbb{\lrcorner}$ in adjusting themselves to new clinical settings, $\mathbb{\ulcorner}$fear and anxiety$\mathbb{\lrcorner}$ in using unskillful nursing skills. They also went through $\mathbb{\ulcorner}$stress> by difficulties in applying their knowledge and skill to nursing practice, in lack of nursing knowledge and skill, in dealing with making interpersonal relationship with clinical staffs, in insufficiency of clinical instructions and in role ambiguity among nursing students. Physical $\mathbb{\ulcorner}$fatigue$\mathbb{\lrcorner}$ and $\mathbb{\ulcorner}$disappointment and doubt$\mathbb{\lrcorner}$ by the difference between reality and expectation caused by clinical experience. However, clinical experience enabled nursing students to enhance their understanding of human beings, learning, their satisfaction. to nursing practice, to identify the confirmation of nursing identity, so to gain $\mathbb{\ulcorner}$sense of accomplishment$\mathbb{\lrcorner}$. The results of this study are to use as basic data for students attending clinical experience for the first time.

• 기본간호학회지
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• 제18권1호
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• pp.6-18
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• 2011

Purpose: This study was done to explore the meaning and nature of life world for adolescents with epilepsy. The hermeneutic phenomenological method which was developed by van Manen was used. Methods: Participants were four boys and five girls, ages 13 to 18 being seen in a neurology outpatient department. Data were collected from iterative work with in-depth interviews from during the period from February to September, 2010. Contents of the interviews were tape-recorded with participant consent. Results: Essential themes that fit into the context of the 4 existential grounds of body, time, space and other people were: an illness that makes a hurt in one's heart rather than one's body, a change in the body that is not controllable, a future like thick fog, everyday life trapped in illness, a change of relationships, learning how to live with an illness. Conclusion: Findings reveal the life world of the adolescents is affected to varying degrees by the epilepsy. It is important for nurses to identify and address developmental issues and effects of the illness and to support reorientation in a disintegrated life situation. The result of this study will provide nurses with insights into these experiences and should help promote empathetic care.

• Journal of Acupuncture Research
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• 제38권4호
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• pp.300-311
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• 2021

Background: So far there is no confidence in the basics of acupoint/meridian phenomena, specifically in spatial and temporal electrical manifestations in the skin. Methods: Using the skin electrodynamic introscopy, the skin areas of 32 × 64 mm² were monitored for spectral electrical impedance landscape with spatial resolution of 1 mm, at 2 kHz and 1 MHz frequencies. The detailed baseline and 2D test-induced 2 kHz-impedance phase dynamics and the 4-parameter time plots of dozens of individual points in the St32-34 regions were examined in a healthy participant and a patient with mild gastritis. Non-thermal stimuli were used: (1) (for the sick subject), microwaves and ultraviolet radiation applied alternately from opposite directions of the meridian; and (2) (for the healthy one) microwaves to St17, and cathodic/anodic stimulation of the outermost St45, alternately. Results: In both cases, the following phenomena have been observed: emergence of in-phase and/or antiphase coherent structures, exceeding the acupoint conditional size of 1 cm; collective movement along the meridian; reversible with a reversed stimulus; counter-directional dynamics of both whole structures and adjacent points; local abnormalities in sensitivity and dynamics of the 1 MHz and 2 kHz parameters indicating existence of different waveguide paths. Conclusion: It is assumed that these findings necessitate reconsideration of some basic methodological issues regarding neurogenic/acupuncture points as spatial and temporal phenomena; this requires development of an appropriate approach for identifying the acuzones patterns. These findings may be used for developing new approaches to personalized/controlled therapy/treatment.

• 대한간호학회지
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• 제52권2호
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• pp.134-143
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• 2022

Purpose: The study aimed to understand the delirium experience of intensive care unit (ICU) patients. Methods: We performed a qualitative study using Colaizzi's phenomenological method. Eleven patients, who experienced delirium according to the Confusion Assessment Method for ICU, participated after transferring to general wards from the ICU. Individual in-depth semi-structured interviews ranging from 30 minutes to 2 hours in length were conducted between November 2018 and August 2019. Results: Nine themes and four theme clusters emerged. The four theme clusters were: 1) "Overwhelmed by fear," which describes the experience of a patient close to death and the feeling of difficulty in understanding disorganized thinking; 2) "Anxious about not understanding the situation," which means that patients' sense of time and space were disordered in the ICU; 3) "Being deserted," which indicates the feeling of being separated from others and yourself; and 4) "Resistance to protect my dignity," which indicates that the dignity and autonomy of an individual in the patient's position at the ICU, are ignored. Conclusion: Nursing interventions are needed that would enable patients to maintain orientation and self-esteem in the ICU. In addition, healthcare providers need to provide information about the unfamiliar environment in the ICU in advance.

• Wind and Structures
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• 제37권3호
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• pp.191-209
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• 2023

This work investigates the subcritical free-shear prism wake at Re=22,000 by the Koopman analysis using the Dynamic Mode Decomposition (DMD) algorithm. The Koopman model linearized nonlinearities in the stochastic, homogeneous anisotropic turbulent wake, generating temporally orthogonal eigen tuples that carry meaningful, coherent structures. Phenomenological analysis of dominant modes revealed their physical interpretations: Mode 1 renders the mean-field dynamics, Modes 2 describes the roll-up of the Strouhal vortex, Mode 3 describes the Bloor-Gerrard vortex resulting from the Kelvin-Helmholtz instability inside shear layers, its superposition onto the Strouhal vortex, and the concurrent flow entrainment, Modes 6 and 10 describe the low-frequency shedding of turbulent separation bubbles (TSBs) and turbulence production, respectively, which contribute to the beating phenomenon in the lift time history and the flapping motion of shear layers, Modes 4, 5, 7, 8, and 9 are the relatively trivial harmonic excitations. This work demonstrates the Koopman analysis' ability to provide insights into free-shear flows. Its success in subcritical turbulence also serves as an excellent reference for applications in other nonlinear, stochastic systems.

• 한국분말재료학회지
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• 제31권3호
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• pp.213-219
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• 2024

Additive Manufacturing (AM) is a process that fabricates products by manufacturing materials according to a three-dimensional model. It has recently gained attention due to its environmental advantages, including reduced energy consumption and high material utilization rates. However, controlling defects such as melting issues and residual stress, which can occur during metal additive manufacturing, poses a challenge. The trial-and-error verification of these defects is both time-consuming and costly. Consequently, efforts have been made to develop phenomenological models that understand the influence of process variables on defects, and mechanical/ electrical/thermal properties of geometrically complex products. This paper introduces modeling techniques that can simulate the powder additive manufacturing process. The focus is on representative metal additive manufacturing processes such as Powder Bed Fusion (PBF), Direct Energy Deposition (DED), and Binder Jetting (BJ) method. To calculate thermal-stress history and the resulting deformations, modeling techniques based on Finite Element Method (FEM) are generally utilized. For simulating the movements and packing behavior of powders during powder classification, modeling techniques based on Discrete Element Method (DEM) are employed. Additionally, to simulate sintering and microstructural changes, techniques such as Monte Carlo (MC), Molecular Dynamics (MD), and Phase Field Modeling (PFM) are predominantly used.