Purpose: This study examines parental perceptions of Adverse Childhood Experiences (ACEs) and identifies key educational components for effective prevention programs. Given the long-term impact of ACEs on child development and well-being, understanding parental perspectives is essential for designing targeted interventions. By identifying gaps in parental awareness, this study provides a foundation for structured, evidence-based interventions aimed at reducing ACEs and promoting child well-being. Methods: A qualitative content analysis was conducted using the data obtained from semi-structured, in-depth interviews with 12 mothers of preschool-aged children between January 3, 2022, and January 11, 2022. Participants were recruited through purposive sampling to ensure diversity in parenting backgrounds and exposure to ACE-related risk factors. The interviews were transcribed verbatim and thematically analyzed until data saturation was reached, ensuring the identification of consistent patterns in parental perspectives and educational needs. Results: Five key themes emerged from the analysis. First, “Memories and emotions of ACEs” highlighted how past experiences of coercive parenting, neglect, and emotional detachment influenced current parenting practices, with many parents expressing a desire to break negative cycles. Second, “Long-term impacts of ACEs” revealed persistent psychological and emotional effects, including anxiety, low self-esteem, difficulties in emotional regulation, and struggles in forming secure attachments. Third, “Parent education needs for preventing ACEs” emphasized the need for structured training programs focusing on emotional regulation, stress management, positive discipline strategies, and effective communication skills to support healthy parent-child relationships. Fourth, “Social factors and family environment improvement” identified financial instability, limited access to community support, and social stigma as significant barriers to creating a safe and nurturing home environment. Finally, “Proposals for promoting healthy child development” included recommendations for increasing public awareness of ACEs, expanding accessible parenting education, and developing community-based initiatives to enhance family resilience and reduce ACE risk factors. Conclusion: The findings underscore the importance of comprehensive parent education programs that emphasize non-violent discipline, empathetic communication, and parental stress management. Additionally, integrating social support systems, advocating for public policies that strengthen family well-being, and raising awareness of ACEs can enhance preventive efforts. Future research should assess the effectiveness of such programs across diverse socio-economic and cultural backgrounds to develop sustainable ACE prevention strategies. Expanding access to evidence-based parenting programs and incorporating them into public health initiatives will be the key to ensuring long-term success, reducing ACE prevalence, and promoting healthier childhood environments.

Purpose: This mixed methods study aimed to investigate the anxiety and nursing satisfaction levels and experiences among users of a general health checkup center. Methods: A total of 152 participants completed a questionnaire to assess their pre-checkup anxiety and post-checkup nursing satisfaction levels. Additionally, 11 participants were individually interviewed to determine their pre-checkup anxiety and post-checkup nursing satisfaction experiences. Survey data were analyzed using SPSS software, while qualitative data were analyzed using content analysis. Results: The mean anxiety scores were 2.80±2.24 on the Visual Analog Scale for Anxiety and 44.06±9.55 on the State-Trait Anxiety Inventory (STAI) scale. Education level was a significant factor influencing the STAI scores. Participants with a college education or higher had significantly lower STAI scores(p<.005), indicating the association between higher education levels and lower STAI scores. The mean nursing satisfaction score was 36.49±8.84, with male participants reporting higher nursing satisfaction levels. The pre-health checkup anxiety experience included three themes: “contrasting expectations about checkup results,” “various emotions felt during the checkup process,” and “physical and mental reactions.” The health checkup nursing satisfaction experience included four themes: “satisfaction with nurses’ support and care,” “comfort during the checkup process,” “dissatisfaction due to nurses’ habitual responses,” and “expectations for nurses’ emotional support and communication.” Conclusion: Providing comprehensive nursing information is essential to reduce user anxiety and improve nursing satisfaction. Moreover, integrating advanced technologies, such as virtual reality, augmented reality, and metaversing, into information delivery can enhance educational effectiveness and better address the experiences and needs of checkup users.

Purpose: This study aimed to explore the experiences of instructors who participated in and operated a parent education program utilizing the Juingong-gwan practice at the H Science Institute, and to understand the meaning and essence of this program. Methods: This study employed a qualitative content analysis. In-depth individual interviews were conducted with six instructors who participated in the parental education program at H Science Institute. Data were collected over three months from July to September 2023. Results: Seven main themes were identified from the instructors’ experiences in the parent education program at the H Science Institute. The main themes include “Participation with various motivations,” “The essense of parent education: team discussions,” “Feeling compassion and responsibility,” “Challenges in creating lectures,” “Realizing the possibility of mutual change,” “Growth and Transformation through instructor and helper roles,” and “Hope to spread awareness.” Conclusion: This study confirmed that the parent education program utilizing the Juingong-gwan practice at H Science Institute promotes positive changes for both parents and instructors. It also suggests the need for program development, including the use of online platforms, the introduction of step-by-step advanced courses, the provision of follow-up programs, and the expansion of programs that support both teachers and parents.

Purpose: This study aims to explore the in-depth experiences of participating in a parent education program at the H Science Institute and understand the meaning and essence of their experiences. Methods: This study employed qualitative content analysis. Data were collected from June 20 to 30, 2023. Participants were a total of 28 people who could provide detailed experiences of participation in the parent education program at the H Science Institute. Focus-group interviews were conducted with 28 participants. Results: The qualitative content analysis revealed six themes: “Exploring the genuine path to become a parent”, “Precious experiences acquired through education that is not easily accessible”, “Discovering the transformed self through education”, “I believe that there had been a change in family relationships”, “Improvements are required in a few contents”, and “I look forward to the program with more extended outreach”. Conclusion: Efforts are required to understand the current status of parent education, verify its empirical effectiveness, and provide parents with awareness of the necessity to observe and control their minds.

Purpose: This study aims to not only understand the meaning and essence of patients’experiences visiting the Raphael Nanum Homeless Clinic but also explore what kind of healthcare programs they would like to have in the future by appraising patients’experiences in depth. Methods: This study employed a qualitative content analysis method. The data were collected from June 11, 2023, to June 25, 2023. A total of 17 patients who could provide detailed experiences of their visit to the Raphael Nanum homeless clinic participated in this study. We conducted a focus group interview with 6 patients and in-depth one-on-one interviews with the remaining 11 patients. Results: The qualitative content analysis result revealed five themes: “visiting a free clinic for various paths,” “positive experiences at the free clinic,” “negative experiences at the free clinic,” “dissatisfaction with the clinic site,” and “anticipation for the future of the free clinic.” Conclusion: To ensure the right to health and survival of marginalized populations in the future, it is necessary to establish comprehensive healthcare support measures, which include enhancing the facilities of the free clinic and expanding the range of available medical specialties.

Purpose: To determine whether artificial -intelligence quarantine robots can positively contribute to environmental management in medical institutions. We conducted in-depth interviews to understand the experiences of hospitalized patients receiving environmental management from such robots. Methods: Data were collected during March 20~May 20, 2023. individual in-depth interviews were conducted with 15 hospitalized patients, who could provide specific details of their experience of receiving environmental management from a quarantine robot. Results: Qualitative content analysis identified four themes, including “First encounter with an amazing and new quarantine robot,” “Efficiently performs non-face-to-face quarantine work in hospitals,” “Problems with quarantine robots,” and “Recommendations for improving the functionality of quarantine robots in medical institutions so quarantine robots and humans can coexist.” Conclusion: Currently, quarantine robots have limited functionality, and additional research is needed to identify various other functions in consideration of future infectious disease situations and the level of quarantine appropriate in a hospital.

This study demonstrates the effect of the compaction pressure on the microstructure and properties of pressureless-sintered W bodies. W powders are synthesized by ultrasonic spray pyrolysis and hydrogen reduction using ammonium metatungstate hydrate as a precursor. Microstructural investigation reveals that a spherical powder in the form of agglomerated nanosized W particles is successfully synthesized. The W powder synthesized by ultrasonic spray pyrolysis exhibits a relative density of approximately 94% regardless of the compaction pressure, whereas the commercial powder exhibits a relative density of 64% under the same sintering conditions. This change in the relative density of the sintered compact can be explained by the difference in the sizes of the raw powder and the densities of the compacted green body. The grain size increases as the compaction pressure increases, and the sintered compact uniaxially pressed to 50 MPa and then isostatically pressed to 300 MPa exhibits a size of 0.71 m. The Vickers hardness of the sintered W exhibits a high value of 4.7 GPa, mainly due to grain refinement.

Purpose: This study aimed to understand the impact of nurses’ psychosocial experiences in COVID-19 on their mental health and the psychosocial adjustment and growth of patients with COVID-19. Methods: This study used qualitative content analysis. Data were collected through individual in-depth interviews with 10 nurses with COVID-19 from February 24, 2022, to March 17, 2022. Results: Six themes were identified in the qualitative content analysis, including ‘Psychological burden after diagnosis’, ‘Acceptance of confirmed results’, ‘Difficulties caused by change in an unfamiliar environment’, ‘Confusion after returning to daily life’, ‘Mental state after a complete recovery’, ‘Incomplete prevention of infectious disease and control guidelines’. Conclusion: In the context of the COVID-19 pandemic, the physical and mental health of nurses can have a significant impact on the quality of medical care; therefore, an understanding of their psychosocial adjustment will help support nurses adjust better in future pandemic situations.

Purpose: The purpose of this study was to explore the nurses’ experience of the side effects of COVID-19 vaccination and understand its meaning. Methods: This study was a qualitative study using the content analysis method. The data collection period using a focus group was from October 26, 2021 to January 23, 2022. Results: The themes included: “Pressure from mandatory COVID-19 vaccination”, “Feeling relieved because the side effects are mild”, “Severe vaccine side effects cause negative emotions”, “Tolerating side effects and coping personally”, “Confusion and alienation about insufficient coping of side effects”, “Feeling skeptical about the COVID-19 vaccination policy”, “Thinking about how to build trust in the COVID-19 vaccine”. Conclusion: In the future, it is considered important to establish scientific evidence through continuous monitoring and data collection of the side effects of COVID-19 vaccination and to build trust in vaccines through transparent information disclosure.

Purpose: This study aimed to understand the COVID-19 vaccination experience of nursing students and explore its importance. Methods: A descriptive qualitative study and content analysis was conducted. The participants were 14 nursing students who expressed their rejection of COVID-19 vaccination. Data were collected through in-depth interviews from November 24, 2021, to January 30, 2022. Results: The COVID-19 vaccination experience of nursing students included four themes: “nostalgia for everyday life before COVID-19”, “hesitancy to get vaccinated against COVID-19”, “different thoughts about COVID-19 vaccination”, and “future direction of COVID-19 vaccination”. Conclusion: The COVID-19 vaccination experience of nursing students may be due to a lack of trust in COVID-19 vaccination. Therefore, accurate information about COVID-19 vaccination should be provided to lower the vaccination hesitancy of nursing students.

The synthesis of porous W by freeze-casting and vacuum drying is investigated. Ball-milled WO3 powders and tert-butyl alcohol were used as the starting materials. The tert-butyl alcohol slurry is frozen at –25oC and dried under vacuum at –25 and –10oC. The dried bodies are hydrogen-reduced at 800oC and sintered at 1000oC. The XRD analysis shows that WO3 is completely reduced to W without any reaction phases. SEM observations reveal that the struts and pores aligned in the tert-butyl alcohol growth direction, and the change in the powder content and drying temperature affects the pore structure. Furthermore, the struts of the porous body fabricated under vacuum are thinner than those fabricated under atmospheric pressure. This behavior is explained by the growth mechanism of tert-butyl alcohol and rearrangement of the powders during solidification. These results suggest that the pore structure of a porous body can be controlled by the powder content, drying temperature, and pressure.

The effects of drying temperature on the microstructure of porous W fabricated by the freeze-casting process of tert-butyl alcohol slurry with WO3 powder was investigated. Green bodies were hydrogen-reduced at 800oC for 1 h and sintered at 1000oC for 6 h. X-ray diffraction analysis revealed that WO3 powders were completely converted to W without any reaction phases by hydrogen reduction. The sintered body showed pores aligned in the direction of tertbutyl alcohol growth, and the porosity and pore size decreased as the amount of WO3 increased from 5 to 10v ol%. As the drying temperature of the frozen body increased from -25oC to -10oC, the pore size and thickness of the struts increased. The change in microstructural characteristics based on the amount of powder added and the drying temperature was explained by the growth behavior of the freezing agent and the degree of rearrangement of the solid powder during the solidification of the slurry.

The effect of tert-butyl alcohol (TBA) as a freezing solvent on the pore structure of a porous tungsten body prepared by freeze-drying is analyzed. TBA slurries with a WO3 content of 10 vol% are prepared by mixing with a small amount of dispersant and binder at 30oC. The slurries are frozen at -25oC, and pores are formed in the frozen specimens by the sublimation of TBA during drying in air. After hydrogen reduction at 800oC and sintering at 1000oC, the green body of WO3 is completely converted to porous W with various pore structures. Directional pores from the center of the specimen to the outside are observed in the sintered bodies because of the columnar growth of TBA. A decrease in pore directionality and porosity is observed in the specimens prepared by long-duration drying and sintering. The change in pore structure is explained by the growth of the freezing solvent and densification.

Purpose: This study was aimed to analyze the research trends by investigating the nursing theories used in research articles in Journal of Korean Academy of Nursing for the last 10 years. Methods: Among the research articles published in the Journal of Korean Academy of Nursing for the past 10 years from 2010 to 2019, the research trends was analyzed by investigating the nursing theories used in the studies. Results: As the results of a survey of 847 papers published in the Journal of Korean Academy of Nursing from 2010 to 2019, 139 studies applied to the theory were extracted. As for the theory, one Grand Theory, Roy’s adaptation model, and 6 Middle Range Theories including Kolcaba’s comfort theory, Pender's health promotion model, King's goal attainment theory, Watson's human caring theory, Reed's self-transcendence theory, Mishel's uncertainty in illness theory. Conclusion: In nursing, more use of nursing theories in research is necessary in the future, not only in quantitative research methods but also in qualitative research.

Purpose: The purpose of this study was to understand in-depth experiences of role conflict among infection control nurses’ (ICNs) in terms of the gaps between the role expectations and actual roles. Methods: This study was a qualitative study to explore and describe the implications of role conflict experiences of ICNs through a phenomenological approach. One-on-one in-depth interviews were conducted with ICNs who worked as full-time for more than three years in the infection control department, and the results were analyzed using Colaizzi’s (1978) phenomenological method. Results: Topics brought up by the participants were categorized into five themes. The themes included "lack of awareness of infection control", "psychological burden of professional competence", "infectious control not being accepted due to different management and operational goals", "unrelentingly overworked", "shadow labor without adequate compensation", and "The process of earning mutual trust". Conclusion: In order to resolve the role conflict of ICNs, it is necessary to establish a career management system for ICNs and to have an appropriate compensation system.

Purpose: We conducted phenomenological qualitative research to provide in depth understanding on infectious disease management. Methods: Participants were 10 nurses working in an isolation ward, where only patients with infectious diseases were institutionalized in one general hospital in Seoul. Data were collected through individual interviews and analyzed according to Colaizzi data analysis method. Results: The main theme of the experience of the nurses who worked in the isolated ward was ‘Nurse's sense of duty to overcome the fear of infection’. Through 83 meaningful re-statements and 13 themes, three sub-themes including ‘Unstable isolation ward’, ‘Taking care of infected patients’ and ‘Insufficient isolation patient care system’. Conclusion: Nurses, working in the new isolation ward, work in a lonely and dangerous environment having fear of infection, being lack of supplies and overcoming various psychological difficulties. In-depth understanding of these needs require efficient infection management policies, measures, and societal recognition.

PURPOSES : The impact performance of flexible barrier system such as structural response, vehicular motion and occupant safety vary depending on the impact point. Thus, to properly evaluate the performance of a flexible barrier system, impact should be made to a point which will lead to the worst possible results. This point is called the Critical Impact Point (CIP). This paper presents the way to determine the CIP for a SB2 class flexible barrier system which is consisted of Thrie-Beam rail and circular hollow tube post of 2m span. METHODS: Barrier VII simulations were made for impact points; Case 1 at a post, Case 2 at 1/3 span downstream from a post, Case 3 at middle of the span, Case 4 at 2/3 span downstream from a post. For the structural performance (deflections), impact simulation of 8000kg-65km/h-15degree was used, and for vehicle motion and occupant safety, simulation of 1300kg-80km/h-20degree impact was made and analysed. RESULTS: Case 1 gave the largest dynamic deflection of 75.72cm and also gave the largest snag value of 44.3cm. Occupant safety and exit angle of the vehicle after the impact were not sensitive to the impact point and were all below the allowable limit. CONCLUSIONS : For the SB2 class flexible barrier system's CIP can be regarded as a post which is sufficiently away from the end of Length of Need in order to avoid the end-effect of the barrier system. It can be more economic in the long run because the normal concrete pavement material is likely to cost more due to higher probability of maintenance and repair and higher social cost due to traffic accident, etc.