• Journal of the korean academy of Pediatric Dentistry
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• v.29 no.1
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• pp.84-91
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• 2002

The purpose of study was to assess the influence of acidic drinks on the erosion of tooth enamel and the effect of fluoridated saliva on the remineralization. Twenty five drinks were sampled. The erosive potential and remineralizing effect were measured by the tooth surface microhardness test. The pH of most drinks were below pH 5.5. Reduction rates of enamel surface hardness by the flavored carbonated drink were 16.90%, 25.11%, 35.10%, and 41.62% after 5, 10, 30, and 60 minutes of demineralization, and recovery rates by remineralizaing solution were 61.52%, 67.96%, 72.13% and 75.93% after 1, 24, 48, and 72 hours of remineralization, respectively. The results suggest that the most drinks in the markets have the potential to erode the teeth and that erosion occurs fast but remineralization proceeds slowly.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.2
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• pp.1109-1117
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• 2015

The purpose of this study was to examine the job-seeking stress of nursing students according to their critical thinking disposition and self-esteem and the relationship of these variables. The subjects in this study were 332 nursing students. The students got $89.57{\pm}9.77$ in critical thinking; $25.11{\pm}2.58$ in self-esteem; and $46.38{\pm}17.67$ in job-seeking stress. There was a positive correlation between critical thinking and self-esteem(r=.294, p<.001), and critical thinking(r=-.240, p<.001) had a significant positive correlation with self-esteem(r=-.209, p<.001). Critical thinking disposition and self-esteem were identified as the variables to affect job-seeking stress, and the two variables had a 35.2% explainability.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• v.45 no.2
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• pp.83-90
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• 2019

Objectives: This study evaluated the predictive factors for survival of patients with oral squamous cell carcinoma (OSCC) and investigated the overall and disease-specific survival (DSS) outcomes. Materials and Methods: A total of 67 consecutive patients who underwent surgery for OSCC from January 2006 to November 2014 were included in this study. Patients were classified according to age, sex, pTNM stages, primary sites, smoking and alcohol drinking habits, depth of invasion, perineural and lymphovascular invasion, cell differentiation and postoperative radiotherapy. Kaplan-Meier methods were used to estimate the survival categorized by patient groups. Cox regression methods were used to investigate the main independent predictors of survival. Results: Nineteen patients died of OSCC during follow-up periods. Another five patients died of other diseases including lung adenocarcinoma (n=1), cerebral infarction (n=1), general weakness (n=2), and pneumonia (n=1). The tongue (n=16) was the most common site for primary origin, followed by buccal mucosa (n=15), mandibular gingiva (n=15), maxillary gingiva (n=9), floor of mouth (n=9), retromolar trigone (n=2), and palate (n=1). Eleven patients had pTNM stage I disease, followed by stage II (n=22) and stage IV (n=34). No patients had pTNM stage III disease in this study. The overall survival of all patients was 64.2% and the DSS was 71.6%. DSS of patients with stage I and II disease was 100%. Stepwise Cox regression showed the two predictors for DSS were pTNM stage (P<0.0001, odds ratio=19.633) and presence of metastatic lymph nodes (P=0.0004, odds ratio=0.1039). Conclusion: OSCC has been associated with poor prognosis; however, there were improved survival outcomes compared with past studies. Advanced-stage disease and presence of metastatic lymph nodes were associated with poorer survival compared with early-stage OSCC and absence of neck node metastasis. Stage I and II OSCC were associated with excellent survival results in this study.

• Restorative Dentistry and Endodontics
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• v.43 no.4
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• pp.40.1-40.10
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• 2018

Objectives: This study evaluated the microtensile bond strength (${\mu}TBS$) of polymer-ceramic and indirect composite resin with 3 classes of resin cements. Materials and Methods: Two computer-aided design/computer-aided manufacturing (CAD/CAM)-fabricated polymer-ceramics (Enamic [ENA; Vita] and Lava Ultimate [LAV; 3M ESPE]) and a laboratory indirect composite resin (Gradia [GRA; GC Corp.]) were equally divided into 6 groups (n = 18) with 3 classes of resin cements: Variolink N (VAR; Vivadent), RelyX U200 (RXU; 3M ESPE), and Panavia F2 (PAN; Kuraray). The ${\mu}TBS$ values were compared between groups by 2-way analysis of variance and the post hoc Tamhane test (${\alpha}=0.05$). Results: Restorative materials and resin cements significantly influenced ${\mu}TBS$ (p < 0.05). In the GRA group, the highest ${\mu}TBS$ was found with RXU ($27.40{\pm}5.39N$) and the lowest with VAR ($13.54{\pm}6.04N$) (p < 0.05). Similar trends were observed in the ENA group. In the LAV group, the highest ${\mu}TBS$ was observed with VAR ($27.45{\pm}5.84N$) and the lowest with PAN ($10.67{\pm}4.37N$) (p < 0.05). PAN had comparable results to those of ENA and GRA, whereas the ${\mu}TBS$ values were significantly lower with LAV (p = 0.001). The highest bond strength of RXU was found with GRA ($27.40{\pm}5.39N$, p = 0.001). PAN showed the lowest ${\mu}TBS$ with LAV ($10.67{\pm}4.37N$; p < 0.001). Conclusions: When applied according to the manufacturers' recommendations, the ${\mu}TBS$ of polymer-ceramic CAD/CAM materials and indirect composites is influenced by the luting cements.

• The Journal of the Convergence on Culture Technology
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• v.8 no.4
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• pp.67-74
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• 2022

The purpose of this study was to develop and apply a mental simulation practice program using standardized patients for nursing students and to verify the effectiveness. This study is a single-group pre- and post-design study, and a structured questionnaire was provided to 186 nursing students at a university in J for data collection. The collected data were analyzed using SPSS/WIN 27.0 program. As a result of the study, the mental simulation practice education program using standardized patients showed the subjects' communication ability (t=-2.575, p=001), learner self-efficacy (t=-2.228, p=.026) and problem-solving ability (t=-2.298, p=.017) was found to be effective. As a result of this study, it is necessary to develop and apply a simulation practice education program that creates an environment similar to the actual situation and applies various cases using the necessary resources to improve the field adaptation ability of nursing students.

• Journal of Korean Biological Nursing Science
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• v.24 no.1
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• pp.67-76
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• 2022

Purpose: The purpose of this study was to find stress mediation strategies for pandemic task forces in the future by identifying role stress experienced by local officials in public health centers working as COVID-19 response task force. Whether they suffered from trauma and post-traumatic stress disorder (PTSD) due to COVID-19 was also determined. Methods: Subjects for this research were 185 public health center workers in 7 northern Gyeonggi cities with at least three months of COVID-19 response task force experience. The investigation lasted for two months, from February to March of 2021. Data were collected using a self-administered questionnaire. Results: The average role stress of research subjects was 2.79±0.60. There were 64 subjects (34.6%) who answered 'yes' for trauma experience due to COVID-19. Subjects' role stress by sociodemographic and role characteristics displayed statistically significant differences in gender (t = -2.74, p= .007), age (F = 6.41, p= .002), profession (F = 0.01, p= .014), and COVID-19 response task (F= 3.01, p= .019). Specifically, role stress was higher for females than for males, those who were in their 20's (than 40's), a nursing profession (rather than others). Role stress was also higher in COVID-19 confirmed response work or in a self-quarantine work. There was a significant difference in trauma according to COVID-19 response roles (χ² = 26.59, p= < .001) and other tasks given or not (χ²= 9.48, p= .002). Conclusion: It is necessary to take measures to reduce COVID-19 response task force's role stress and trauma.

• Journal of People, Plants, and Environment
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• v.23 no.1
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• pp.67-75
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• 2020

The purpose of this study was to develop an effective horticultural activity program for the vocational rehabilitation of people with mental disabilities. The subjects of this study were seven persons with mental disabilities in the vocational rehabilitation team of a public health center located in G city, Gyeongsangbuk-do. A total of 10 horticultural programs were held from October 10 to December 11, 2018. Five programs were selected among those that were easy for the persons with mental illness to handle and their preference was high. In each session, the same task was repeated 10 times and finally changes in hand functions and working speed were measured. As a result, the assembly task of the Purdue Pegboard test was 23.6 (SD = 10.5) before the program, 26.6 (SD = 11.5) after planting, 27.7 (SD = 12.2) after wrapping pots, and 28.0 (SD = 13.9) after making mini flower baskets, 26.9 (SD = 12.0) after wrapping a single flower, and 29.1 (SD = 11.9) after making corsages. There was a significant difference between the five programs (p = .016). As a result of measuring the time taken to produce the same 10 products, the average planting time was 9.9 (SD = 4.0) minutes in the first class and 6.0 (SD = 2.3) minutes in the second class (p = .018), and making mini flower baskets was reduced from 35.2 (SD = 10.1) minutes to 21.0 (SD = 7.7) minutes (p = .018), wrapping a single flower from 23.3 (SD = 7.9) minutes to 16.2 (SD = 7.3) minutes (p = .043), and making corsages from 53.6 (SD = 15.9) to 40.8 (SD = 16.8) minutes (p = .043). The working time was significantly shortened in the second class compared to the first class. The class for wrapping pots was shortened from 52.7 (SD = 11.7) to 49.6 (SD = 17.8) minutes, but there was no significant difference (p = .398).

• Korean Journal of Applied Biomechanics
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• v.33 no.4
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• pp.175-184
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• 2023

Objective: The purpose of this study is to investigate the effects of human motion and javelin kinematics during the energy transfer in javelin throwing on records, and to provide evidence-based training insights for athletes and coaches to enhance records. Method: Three javelin throw athletes (age: 22.67 ± 0.58 years, height: 178.33 ± 7.37 cm, weight: 83.67 ± 1.15 kg) were recruited for this study. Each athlete attempted ten maximum record trials, and the kinematic data from each performance were analyzed to determine their influence on the records. The Theia3d Markerless system was used for motion analysis. Results: Key factors were modeled and identified at each moment. In E1, main variables were COM Y (𝛽 8.162, p<.05) and COM velocity Z (𝛽 -72.489, p<.05); in E2, COM X (𝛽 -17.604, p<.05); in E3, COM X (𝛽 -18.606, p<.05), COM velocity Y (𝛽 38.694, p<.05), and COM velocity X (𝛽 66.323, p<.05). For the javelin throw dynamics in E3, key determinants were Attitude angle and Javelin velocity in the Y-axis. Conclusion: The study reveals that controlled vertical movement, center of mass management during braking, and enhanced pelvic rotation significantly improve javelin throw performance. These kinematic strategies are critical for record enhancement in javelin throwing.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.11
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• pp.544-555
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• 2017

This study was conducted to identify the factors influencing consciousness of biomedical ethics, moral sensitivity and critical thinking disposition with respect to the Code of Ethics of nurses among nursing students. A descriptive correlation research design was used for this study. The subjects were 299 nursing students in two large cities from 1 June to 31 July 2015. Collected data were analyzed using a t-test, ANOVA, Scheffe's test and stepwise multiple regression by the SPSS 22.0 program. The results revealed that female subjects comprised 86.65% of the subjects and the mean age was 21.67 years. Awareness of the Code of Ethics for nurses was positively correlated with the consciousness of biomedical ethics(p<0.001), moral sensitivity(p<0.001), and critical thinking disposition(p<0.001). However, there were negative correlations between grade(p=0.017), marital state(p=0.012), and the possibility of increasing ethical problems according to the development of bioscience(p=0.012). Significant influencing factors of the awareness of the Code of Ethics for nurses included grade(p=0.013), marital state(p=0.030), consciousness of biomedical ethics(p=0.017), moral sensitivity(p<0.001), and critical thinking disposition(p=0.001), with apower of explanation of 26.3%. The results of this study show that the consciousness of biomedical ethics, moral sensitivity and critical thinking disposition are factors influencing the code of ethics for nurses among nursing students.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.9
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• pp.362-373
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• 2018

This study was pre-experimental research designed to compare the differences between pre-and post the effect of core fundamental education program of senior nursing student′s core fundamental nursing skills, clinical competency and problem solving process for one semester. Core fundamental education program which consists of three steps, 12 session. The subjects of this study were 192 graduates of one nursing college and surveyed from March 20 to June 23, 2017. The data were analyzed using descriptive statistics, the paired t-test, t-test, ANOVA by SAS for Windows(ver. 9.8) and AMOS(ver. 20.0) As a result, pre-post recognition level of core fundamental education program was nursing skills competency pre $(3.42{\pm}.42)$ and post $3.88({\pm}.61)$, clinical competency was pre $3.74({\pm}.47)$ and post $3.98({\pm}.67)$. The core fundamental nursing skills(p=.017), clinical competency(p=.041) increased significantly after education program. Core fundamental nursing skills, clinical competency and problem solving process was significantly different according to male group(p=.003/p=.013/p=.005), high satisfaction group in nursing major(p=<.000/p=.009/p=<.000), confidence improvement group(p=.044/p=.047/p=.004) at the core skill contest. In conclusion, this study showed that the core fundamental nursing education program of senior nursing students had a positive effect on core fundamental nursing skills and clinical competency.