• Journal of Aquaculture
• /
• v.21 no.4
• /
• pp.309-316
• /
• 2008

Effects of the various dietary additives on growth and tolerance of abalone Haliotis discus hannai to the stresses were determined in the 16-week feeding trial. Seventy juvenile (an initial body weight of 4.2 g) abalone per container were randomly distributed into 21, 50 L plastic rectangular containers each. The six kinds of experimental diets were prepared: control (CON) with no additive, by-product of green tea (BPG), extract of figs (EF), extract of green tea (EG), commercially available product of Hearok (PH), and Haematococcus (HC). In addition, dry sea tangle (ST) was prepared to compare the efficiency of the experimental diets. Fishmeal, soybean meal and shrimp head meal were used as the protein source, and dextrin, sea tangle powder and wheat flour, and soybean oil and fish oil were used as the carbohydrate and lipid sources, respectively in the experimental diets. The experimental diets were fed to abalone once a day at a satiation level with a little leftover. The feeding trial lasted for 16 weeks. At the end of the 16-week feeding trial, abalone was exposed to the different types of stresses (air exposure, and sudden changes of rearing temperature and salinity). Survival of abalone fed the sea tangle was highest. However, weight gain of abalone fed the EF, EG and PH diets was significantly (P<0.05) higher than that of abalone fed the BPG diet or dry sea tangle. Shell length of abalone fed the all experimental diets was significantly (P<0.05) higher than that of abalone fed the dry sea tangle. Accumulated mortality of abalone fed the sea tangle was low when exposed to the different types of stresses. Also, relatively low mortality was achieved in abalone fed the HC and EF diets. In considering these results, it can be concluded that the various sources of additives is effective to improve production of abalone, and Haematococcus and extract of figs can be considered as dietary additives to improve resistance of abalone against the different types of stresses.

• Child Health Nursing Research
• /
• v.19 no.2
• /
• pp.85-93
• /
• 2013

Purpose: The study purposes were to describe the process of developing the Korean versions of the Six Dimension Scale of Nursing Performance (Six-D) and Student Nurse Stress Index (SNSI) and psychometric evaluation of the two measurements. Methods: This was a methodology study using a descriptive cross-sectional design with 51 nursing students in 4th year of university. Internal consistency reliability was assessed using Cronbach alphas. Construct validity was determined by exploring correlations among Six-D, SNSI, objective structured clinical examination (OSCE), self-efficacy and grade point average (GPA). Results: Internal consistency reliability of Six-D and SNSI was acceptable with Cronbach's ${\alpha}$ of .95 and .82. Correlation analysis to determine construct validity revealed that Six-D presented positive correlations with OSCE (r=.109~.272) and self-efficacy (r=.005~.161) and negative correlation with GPA (r=-.246~-.394), although all were not statistically significant. SNSI presented all negative correlations with OSCE (r= -.007~-.238), self-efficacy (r=-.246~-.394), and GPA (r=-.092~-.426) and were mostly statistically significant except OSCE. Conclusion: Six-D needs more evidence to confirm validity to predict observed clinical competency and theoretical relationships with self-efficacy and GPA. However, SNSI presented trends of expected relationships with relevant variables. Therefore, further research is recommended in testing validity of Six-D with other student populations.

• Proceedings of the Korean Information Science Society Conference
• /
• 2012.06a
• /
• pp.197-199
• /
• 2012

최근에 우리 사회는 불규칙적인 식습관, 부족한 운동, 과도한 스트레스 등으로 만성질환 및 성인병 환자가 늘어나는 심각성이 날로 커지고 있다. 성인병의 심각성은 40대 이상에서 크게 대두 되었던 과거와 달리, 최근에는 20대를 넘어서서 10대 청소년에게까지 성인병을 앓고 있는 환자들이 날로 많아지고 있다. 세계적으로 IT가 크게 발달함에 따라 병원과 환자가 서로 만나지 않아도 24시간 소통이 되는 u-Healthcare 시스템이 크게 대두되고 있다. 이에 따라서 환자 개개인과 주치의가 시 공간에 제약받지 않고 상호 긴밀하게 진료, 검사 및 피드백이 가능하게 된다. 본 연구진은 u-Healthcare 시스템에 부합하고 스마트 폰을 이용하여 만성질환자를 관리할 수 있는 u-DailyCare 시스템을 설계하고 구현하였다. 스마트 폰 사용자로부터 얻어진 생체 정보 데이터 및 행위 데이터들을 수집하여 서버에 보내면, 주치의는 종합된 전체적인 데이터를 실시간으로 확인하여 환자의 상태를 검토 및 진단하여 피드백을 준다. 본 논문에서는 u-DailyCare 시스템의 설계 및 구현과정을 설명할 것이다.

• The Journal of Korean Academic Society of Nursing Education
• /
• v.21 no.2
• /
• pp.237-245
• /
• 2015

Purpose: The purpose of the study was to explore the levels of self-awareness, assertiveness, life stress, and empathy in nursing students and identify influential factors on empathy. Methods: A predictive correlational design was used. The data was collected by questionnaires from a convenience sample of 319 nursing students in 2014 in Korea. The data was analyzed using descriptive statistics, t-test, ANOVA, Pearson correlation coefficients, and stepwise multiple regression. Results: The mean items scores of self-awareness, assertiveness, life stress, and empathy were 3.49, 3.02, 2.20 and 3.58, respectively, of a possible score ranging from 1 to 5. Empathy significantly differed by gender, grade, satisfaction with nursing as a major, and clinical practice experience. Empathy was correlated with self-awareness and interpersonal relationship stress. As a result of multiple regression analysis, empathy accounted for 20.1% of the variance by self-awareness, gender, clinical practice experience and interpersonal relationship stress. The most important factor was self-awareness, which explained 11.6% of the variation. Conclusion: The results of the study reveal that strengthening self-awareness and relieving interpersonal relationship stress ought to be integrated in developing effective educational intervention for enhancing empathy in nursing students.

• The Korean Journal of Health Service Management
• /
• v.9 no.1
• /
• pp.123-131
• /
• 2015

The purpose of this study was to investigate the relationships among self-leadership, stress coping skills, and college life adjustment in nursing students. The data were collected using a self-reported questionnaire from November 4 to November 22. The subjects of the study were 335 nursing students in 1 nursing college located in K city. The data were analyzed by descriptive statistics, t-test, ANOVA, Scheffe's test, and multiple regression test using the SPSS Win. 18.0 program. The results were as follows: the mean score of self-leadership was 3.38, the mean score of stress coping skills was 3.45, and the mean score of college life adjustment was 3.35. There was a significant difference in college life adjustment according to motivation of entrance. Goal-setting, self-reward, and constructive ideas about the self-leadership and active stress coping skills were influencing factors of college life adjustment. In conclusion, it is necessary to increase the level of self leadership and active stress coping skills in nursing students. The results of this study suggest that it is necessary to develop diverse educational programs that can increase self-leadership and active coping skills.

• YAKHAK HOEJI
• /
• v.46 no.6
• /
• pp.466-471
• /
• 2002

Oxidative stress is considered to be associated with many diseases, such as inflammatory and cardiovascular diseases, aging and cancer. An important etiological mechanism of these diseases may be a causal relationship between the presence of oxidants and the generation of lipid hydroperoxides derived from enzymatic reactions or xenobiotic metabolism. The hydroperoxides can be decomposed to alkoxy- (ROㆍ) and peroxy- (ROOㆍ) free radicals that can oxidize other cell components, resulting in changes in enzyme activity or the generation of mediators, which can cause further cell damage. The aim of this study was to evaluate the ability of aqueous extract from the roots of Platycodon grandiflorum A. DC (Campanulaceae), Changkil (CK), to affect cellular response in primary cultures of rat hepatocytes to t-butyl hydroperoxide (t-BHP) induced oxidative stress and hepatotoxicity. CK-treated cells showed an increased resistance to oxidative challenge, as revealed by a higher percent of survival capacity in respect to control cells. CK reduced t-BHP-enhanced lipid peroxidation measured as production of malondialdehyde and enhanced intracellular reduced glutathione depletion by t-BHP. Furthermore, CK protected from the t-BHP-induced intracellular generation of reactive oxygen species assessed by monitoring dichlorodihydrofluorescein fluorescence. It can be concluded that CK exerts an antioxidant action inside the cell, responsible for the observed modulation of the cellular response to oxidative challenge, and CK have a marked antioxidative and hepatoprotective potency.

• The Journal of the Korea institute of electronic communication sciences
• /
• v.13 no.3
• /
• pp.677-684
• /
• 2018

Recently, negative emotional responses by drivers are a growing problem, which leads to not only a traffic accident but a crime so called 'road rage' in countries with heavy traffics including South Korea. Under such a circumstance, measuring stress- and fatigue-induced emotional responses by means of wireless communication and a wearable system would be useful. The purpose of this study is to implement a system that measures various signals from a driver, derives and monitors his emotional responses from the measurements and verify its derivations with reliability. This paper, as a first part of the research, describes how the system has been implemented with experimental methods.

• Journal of Plant Biotechnology
• /
• v.39 no.1
• /
• pp.81-92
• /
• 2012

Two-dimensional gel electrophoresis (2-DGE) is one of the most important technologies for high-resolution separation of proteins for proteomics. In this study, we present a detail 2-DGE protocol which allows detection and quantification of total plant proteins separated on gels to improve matching in image analysis. This protocol highlighted here may be useful for researchers, who like to first study for the development of protein biomarkers involved in development, biotic and abiotic stresses in plant.

• Journal of Preventive Medicine and Public Health
• /
• v.31 no.4 s.63
• /
• pp.719-727
• /
• 1998

This study was carried out to assess the relationship between jobstrain, psychosocial distress and homocysteine. The study design was cross-sectional, and included 152 industrial workers in middle sized city. A self-adminstered questionnaire measured general characteristic, job strain and psychosocial distress. Blood was drawn into EDTA tube, and total plasma homocysteine was measured by HPLC. Homocysteine in the high job demand group was sagnificantly higher than that in the low job demand. Cholesterol in the high job control group was significantly higher than that in the low job control. Homocysteine was significantly higher in the high job strain group than that in the other group. Folate and vitamin B12 showed a significantly negative correlation with homocysteine. Multiple regression analysis was used to determine whether the psychosocial distress and other variable contributed to explaining the homocysteine. Stress correlates with the homocysteine.

• Journal of the Korean Home Economics Association
• /
• v.41 no.8
• /
• pp.139-158
• /
• 2003

This study investigated the effects of Korean parents' family-of-origin experiences, marital conflict, open or dysfunctional communication with their children, children's coping behaviors on their behavior problems as a function of a child's sex. Theoretical models for both sexes were constructed based on the results. Two hundred and nine boys and one hundred and ninety six girls of 4th and 5th grades from two elementary schools filled out the questionnaires to assess their communication with the parents, their problem-focused coping behaviors, and their internalizing and externalizing behavior problems. Four hundred five parents of these children answered the questionnaires to assess differentiation for the family-of-origin and the marital conflict. The results were as follows. Boys' path pattern showed that the fathers' differentiation from the family-of-origin effected their sons' internalizing and externalizing behavior problems through parent-child dysfunctional communication. Girls' path exhibited two different patterns. One is that the mothers' differentiation from the family-of-origin effected their daughters' internalizing and externalizing behavior problems through parent-child dysfunctional communication. Another one is that the mothers' differentiation from the family-of-origin influenced children's internalizing behavior problems through daughters' problem-focused coping behaviors as well as parent-child dysfunctional communication.