• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.5
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• pp.275-284
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• 2018

This study was a descriptive study to investigate the effects of nursing students' consciousness of biomedical ethics, good death recognition, and self-esteem on attitudes toward withdrawal of life-sustaining treatment. The subjects of this study were 204 nursing students attending university. The data were collected from October 24 to October 31, 2017 and analyzed using the SPSS Win. 22.0 program. Attitudes toward withdrawal of life-sustaining treatment scored $2.97{\pm}0.29$ out of 4, $3.01{\pm}0.31$ for biomedical ethics, $3.24{\pm}0.38$ for good death recognition and $3.23{\pm}0.41$ for self-esteem. There was a significant positive correlation between attitudes toward withdrawal of life-sustaining treatment and good death recognition, and there was a significant positive correlation between attitudes toward withdrawal of life-sustaining treatment and self-esteem. As a result of multiple regression analysis, it was found that good death perception affected nursing students' attitudes toward the withdrawal of life-sustaining treatment. In other words, elevated perception of good death was associated with more positives attitudes toward withdrawal of life-sustaining treatment. Based on the above results, it is necessary to develop a systematic education program for nursing college students. In addition, this researcher proposes an in-depth study to explore the variables that influence nursing students' attitudes toward withdrawal of life-sustaining treatment.

• Korean Journal of Childcare and Education
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• v.9 no.2
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• pp.215-238
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• 2013

This study examined the effects of mothers' rejective parenting, emotional expressivity, children's emotional regulation strategy on their social withdrawal. Participants were 223 children(121 boys, 102 girls; recruited from classes with 4-5 year olds), their mothers and 20 child care teachers. The teachers completed rating scales to measure the children's social withdrawal and emotional regulation strategies. Mothers reported their rejective parenting along with emotional expressivity. The collected data were analyzed using descriptive statistics, Pearson's productive correlation coefficient, and hierarchical multiple regressions. Results showed that mothers' rejective parenting, children's venting/support seeking strategy and avoidance/non-responsive strategy had positive relation to, whereas mother's positive expressivity were negatively related to their social withdrawal. Hierarchical regression analysis indicated that the interaction of mother's rejective parenting and positive expressivity predicted children's social withdrawal. Mother's rejective parenting was associated with children's social withdrawal, especially for children with the lowest level of mother's positive expressivity. In addition, the association between mother's rejective parenting and children's social withdrawal were partially mediated by their venting/support seeking strategy.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.31 no.4B
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• pp.343-352
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• 2011

The water quantity by intake station as well as the tributary flow discharge acting as sink or source were added to the main flow rate in the present study and RMA-2 and RMA-4 models were applied to the reach from Pal-dang dam to Jam-sil submerged weir to investigate the influence of water supply withdrawal on the river flow and water quality. The numerical results revealed that the water supply withdrawal from 5 intake stations located upstream of Jam-sil submerged weir changed the total flow rate and therby induced different hydraulic characteristics in terms of water surface elevation and velocity. The changed flow field by the inclusion of water intake quantity led to the variation of water quality. By the consideration of the water supply withdrawal, the velocity structure was significantly disturbed by the outflowing flow condition nearby Gu-ui, Ja-yang, and Pung-nap intake stations. Furthermore, the mean velocity was lowered by 25% and the stage upstream of Gu-ui station rose upto 1.5 cm compared with the result by exclusion of water intake. In case of no water withdrawal, the distribution of BOD concentration was parallel throughout the domain. However, when the water withdrawal is considered, the distribution of BOD concentration nearby the Gu-ui, Am-sa, and Ja-yang station was signifiantly changed. In addition, the BOD concentration including the intake stations showed higher value at the downstream of the reach due to the loss of the discharge by water withdrawal effect. It is concluded that both the inflow and outflow discharges from tributaries and water intake stations should be included in the numerical simulation to analyze the hydrodynamic behaviors and mixing characteristics more accurately.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.22 no.1
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• pp.681-690
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• 2021

The aim of this study is to suggest the direction of psychosocial intervention by investigation. To this end, this study examined the moderating effect of peer attachment and patients' positive attitude on the relationship between social withdrawal and life satisfaction of adolescents. Data was obtained from the Korean Children and Youth Panel Survey, and study subjects included 2,409 first grade middle school students. Data was analyzed using the SPSS 25 program, and frequency analysis, descriptive statistical analysis, correlation analysis and hierarchical regression analysis were conducted. The results of the study are as follows: First, psychological withdrawal in the social relationship had a significant negative effect on the life satisfaction of adolescents. Second, peer attachment did not have a moderating effect on the relationship between social withdrawal and life satisfaction of adolescents. Third, positive parenting attitude had a moderating effect on the relationship between social withdrawal and life satisfaction of adolescents. The high-positive parenting attitude group showed less decline in life satisfaction even if social withdrawal was high compared to the low-positive parenting attitude group. Based on these results, we provide effective direction of intervention to elevate the life satisfaction of adolescents experiencing social withdrawal.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.22 no.2
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• pp.539-547
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• 2021

This study was conducted to identify the effects of knowledge of Advance Directives (AD) and the patient's perception of a peaceful death on their attitude toward the withdrawal of life-sustaining treatment and to provide basic data for the development of a nursing intervention program for activating self-determination in the withdrawal of life-sustaining support of patients. The subjects were 167 adult cancer patients who received outpatient or inpatient treatment, from September 15, 2019, to March 30, 2020. The data was analyzed by mean, standard deviation, t-test, ANOVA, Pearson's correlation coefficient, and multiple regression by using SPSS 21.0. From the results, it was observed that the knowledge of AD was 8.87±2.46 out of 12, perception of a peaceful death was 2.87±0.42 out of 4, and attitude toward withdrawal of life-sustaining treatment was 3.46±0.49 out of 5. There was a positive correlation between knowledge of AD, perception of a peaceful death, and their attitude toward withdrawal of life-sustaining treatment. The influencing variables were the knowledge of AD, perception of a peaceful death, discussion with family on withdrawal of life-sustaining treatment, and explanation power was 16.0% (F=10.355, p<.001). Therefore, it is necessary to develop a program that would improve the perception of a peaceful death, increase the knowledge of AD to improve the patients' attitude toward the withdrawal of life-sustaining treatment. An intervention to assist a discussion between the patients and their families in advance would also be useful.

• Asian-Australasian Journal of Animal Sciences
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• v.20 no.1
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• pp.106-111
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• 2007

The current study was conducted to determine the optimum length of feed withdrawal for pre-harvest broilers. A total of three hundred broilers were sampled from an industrial population, and 30 chicks for each weight group (e.g., 1.5 and 2.5 kg) were randomly assigned to feed withdrawal treatments for 0, 3, 6, 9 and 12 h. Weight loss, yield, muscle pH, objective meat color and weights of gastro intestinal contents, crop, gizzard, provenriculus, small intestine, caecum, and rectum were determined. Live weight loss was significantly (p<0.05) increased as length of feed withdrawal extended. A significant (p<0.05) carcass yield for both 1.5 and 2.5 kg groups coincided after 9 and 6 h feed withdrawal, respectively. Net weights of intestinal contents for crop and gizzard were significantly (p<0.05) reduced by 6 h, and the reduction for proventriculus and small intestine occurred from 3 h. A noticeable effect of feed withdrawal on pH for breast muscle at 3 h postmortem occurred only when chicks were fasted for 3 h of which pH (6.05) was significantly (p<0.05) higher than that for other groups including the control (5.74). There was a linear tendency of higher lightness (Hunter L* value) numerically for chicks fasted for longer periods. The highest coefficient of determinations of regression models to estimate weight loss as a function of fasting period and body weights were achieved, when the models included both linear and quadratic terms for fasting period, and linear term for both 1.5 ($R^2=0.76$) and 2.5 kg ($R^2=0.78$) body weight groups. Given the practical aspect, approximately 1.5 kg of body weight is dominant, weight loss could be predicted by the following function; live weight $loss=26.6-0.28{\times}(fasting period)^2+12.34{\times}pasting\;period-0.012{\times}body\;weight$, $R^2=0.76$. Current data implied that the optimum fasting time for pre-slaughter chicks varied depending on slaughter weight; 6 and 9-h fasting were recommendable for 2.5 and 1.5 kg chicks, with little effect on objective meat color.

• Korean Journal of Biological Psychiatry
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• v.6 no.2
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• pp.219-226
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• 1999

Objectives : The aims of this study were to evaluate changes in plasma superoxide dismutase(SOD) activities in alcohol depedence, to find out variables to influence on the SOD activities, and finally to identify the correlation of SOD activities with the alcohol-associated cognitive disorders. Methods : For 24 male alcoholics and 21 healthy male controls, plasma SOD activities were measured by spectrophotometry on 1-2 wks after alcohol withdrawal. Structured interviews and laboratory tests were also performed. Results : 1) Upon comparing SOD activities between controls and alcoholics, the SOD activities were significantly(p<0.01) lower in alcoholics($0.308{\pm}0.140$ units/mL) than in healthy controls($0.313{\pm}0.086$ units/mL). 2) Upon comparing SOD activities according to the presence of alcohol-related cognitive disorders, the SOD activities were significantly(p<0.05) lower in alcoholics with cognitive disorders($0.247{\pm}0.049$ units/mL) than in alcoholics without cognitive disorders($0.317{\pm}0.148$ units/mL). 3) Upon comparing SOD activities according to the presence of alcoholic polyneuropathy or alcohol withdrawal seizure, the SOD activities showed no significant differences between alcoholics with polyneuropathy or epilepsy and those without. 4) Upon analyzing variables influencing on the SOD activities in alcoholics, the SOD activities had the negative correlation with hemoglobin(${\gamma}=-0.433$) and severity of alcohol withdrawal symptoms(${\gamma}=-0.375$). 5) Upon comparing variables according to the presence of alcohol-related cognitive disorders, the occurrence of alcoholic polyneuropathy(p<0.05) and blood phosphorus concentrations(p<0.01) were significantly higher in alcoholics with cognitive disorders than those without. 6) Upon analyzing an association between SOD activities and variables in alcoholics with cognitive disorders, the SOD activities were positively correlated with the onset age(${\gamma}=0.995$), and negatively correlated with the severity of alcohol withdrawal symptoms(${\gamma}=-0.996$). Conclusions : Lower SOD activities in alcohol dependence suggested alcohol-associated cognitive disorders and alcohol withdrawal symptoms might be caused by oxidative stress.

• Journal of Hospice and Palliative Care
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• v.20 no.2
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• pp.131-135
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• 2017

Purpose: Oral naloxone is combined with oxycodone to alleviate or prevent opioid-induced constipation in cancer pain patients. However, there is still concern that oral naloxone may precipitate opioid withdrawal symptoms in patients on opioids. We retrospectively investigated clinical characteristics of cancer patients who experienced opioid withdrawal symptoms. Methods: We reviewed medical records of all patients who were prescribed with oral oxycodone/naloxone at a tertiary cancer center from January 1, 2012 through December 31, 2016. Eligible patients were screened based on demographics, opioid and naloxone dosages, clinical manifestation and pain intensity. Results: Among a total of 1,641 patients, 10 patients were selected. Seven patients were male, and the average age was 68.1 years. The median dose of naloxone that induced withdrawal symptoms was 20 mg. Most common withdrawal symptom was shivering (seven patients) followed by cold sweating (five), and muscle twitching (five). Other symptoms included restlessness, fever, dizziness, and yawning. Pain was exacerbated from the median intensity of numeric rating scale (NRS) 3 to NRS 6. Conclusion: Opioid withdrawal symptoms may occur when switching to oral oxycodone/naloxone for cancer patients who have been treated with other strong opioids. A prospective, multicenter study on this issue should be conducted in future.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.32 no.2B
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• pp.113-121
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• 2012

When a heavy rain brings flooding, a high turbid water is flowing into a reservoir. In this study, the effectiveness of the intake structures for the selective withdrawal from the various levels of a stratified reservoir was evaluated by the field experiments and the numerical modeling of the three-dimensional approaching flows. The temperature, the turbidity, and the velocity fields for the selective withdrawal were measured using both YSI6600EDS and YSI6600ADV, respectively. A threedimensional model, FLOW-3D, was used to predict the performance of the intake tower in Imha reservoir. The comparisons of the vertical velocity field showed a good agreement with the field measurements. The efficiency of the turbid-water elimination of the selective withdrawal method from low levels was higher up to 46% than that of the surface withdrawal. From the analysis of the numerical simulation, the efficiency of turbidity elimination increased by 10% for the selective withdrawal from middle levels, and by 30% from low levels. These results showed that the selective withdrawals from middle and low levels are more effective than the surface-water intake. The similar results were obtained by the one-dimensional model, SELECT, which is much more computationally time-efficient.

• Korean Journal of Social Welfare
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• v.69 no.2
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• pp.63-88
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• 2017

This study was to find out the effect of emotional maltreatment by parents on revictimization of emotional maltreatment by peers targeting second-year students of middle school with depression and social withdrawal as mediating variables. To this end, those who experienced physical violence by parents or friends were excepted from panel data collected by National Youth Policy Institute (KCYPS) and data of 752 people who experienced emotional maltreatment by parents or peers were analyzed. Research hypotheses were verified by a utilizing structural equation model. The results can be summarized as follows: First, experiencing emotional maltreatment by parents has a direct impact on depression and social withdrawal. Second, it was found that depression has a direct impact on experiencing emotional maltreatment by peers while social withdrawal is significant in an indirect path affecting with depression as a mediating variable. Third, the multiple mediated effects of depression and social withdrawal were significant in the revictimization relationship between emotional maltreatment by parents and emotional maltreatment by peers. This means that emotional maltreatment by parents becomes a predictor in re-experiencing emotional maltreatment by peers. It also means that emotional maltreatment by parents has an indirect effect through psychological and emotional factors such as depression and social withdrawal rather than having a direct effect. Based on the results of this study, limitations of the study and suggestions for future research were discussed.