• Journal of Korean Academy of Nursing
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• v.29 no.4
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• pp.766-779
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• 1999

The purpose of this study was to investigate the relationship between the burden on families who live with an elderly person suffering from senile dementia, and the degree of their depression. There were 400 participants in this study, staying in the Seoul and Kyonggi areas from August 1, 1997 to February 28, 1998. Among the group, 100 participants took care of their patient at home, and another 300 participants left 100 patient at a day-care center, 100 sanatorium for senile dementia(asylum for helpless elderly people), 100 an infirmary for elderly people. Eventually 242 subjects out of the 400 were selected for the data analysis. The Zarit (1980) tool was employed to measure the degree of burden and Zung's(1965) “Self-Rating Depression Scale” was employed for the data analysis. The data was analyzed, and the percentage, t-test, ANOVA and Person's Correlation Coefficient were calculated. The results are as follows : 1. The average degree of burden that care-giving families felt was 49.13, which is somewhat high. 2. The average degree of depression that care -giving families felt was 51.95, which is relatively high. 3. The degree of burden was directly affected by the relation with the patient(F＝2.48, P＜.05), and the socio-economic status of the family(F＝5.17, P＜.05). Its also affected by the patient's educational status(F＝2.17, P＜.05). 4. The degree of depression of the family was significantly dependent on sex(t＝-2.05, P＜.05), age (F＝2.99, P＜.05), the relationship with the patient(F＝3.65, P＜.01), socio-economic status (F＝7.74, P＜.001), occupation(t＝2.82, P＜.01), health status(F＝4.42, P＜.01), and the place of residence(F＝4.30, P＜.01), The patient characteristics was significantly dependent on his/her educational status(F＝3.85, P＜.01), the period of suffering from senile dementia(F＝2.47, P＜.05), and smoking habit(F＝6.17, P＜.001). 5. The relationship between the degree of burden and that of depression reads r＝0.43, which is statistically positive correlation in the high significant level. Upon analyzing the entire summation, most care-givers for elderly patients suffering from senile dementia lack time in caring for themselves. They also experience chronic fatigue and mental discomfort caused by the isolation from society, curtailment of certain activities, a sense of responsibility for their patients, and limits of their endurance in taking care of their patients over time. In conclusion, this study emphasizes the necessity for the following propositions : 1. In order to measure the degree of burden that Korean care-giving families undergo, a new tool must be developed on the basis of Korean culture. 2. An educational program based on the demands that care-giving families undergo must be developed, and its clinical effect also has to be examined.

• Journal of Korean Society of Occupational and Environmental Hygiene
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• v.29 no.4
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• pp.550-561
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• 2019

Objectives: The purpose of this study is to provide basic data for the improvement of the working environment for health prevention and related countermeasures for shift workers. This study was conducted based on the Fifth Korean Working Conditions Survey (KWCS), which analyzed the health effects of shift work forces and compared them with preceding studies. Methods: By analyzing secondary rates using raw data from the 5th KWCS, 4,870 (9.7%) of the 50,184 total study subjects were divided into shift work and 45,314 (90.3%) non-shift work groups based on the response to shift status. Variables that could affect work health issues were identified and corrected. A cross-analysis was conducted to examine demographic characteristics (gender, age, and education level) of the workers and occupation characteristics (monthly net earnings, employment type, occupation, working period up to now, workplace scale, type of work system, and weekly working hours). In order to find the work health issue ratio between the shift and non-shift work groups, logistic regression was analyzed and the association with health problems according to shift type by gender was looked at through cross-analysis. Results: According to the surveys conducted from the 1st KWCS (2006) to the 5th KWCS (2017), the proportion of shift workers continued to increase. Also, muscular pains in the lower limbs (hips, legs, knees, feet, etc.) (OR=1.135, 95%CI 1.031-1.251), headaches, eyestrain (OR=1.580, 95% CI 1.428-1.748), anxiety (OR=1.715, 95% CI 1.402-2.099), difficulty falling asleep (OR=1.391), and other problems (OR=7.392) were reported. In addition, back pain, muscular pains in shoulders, neck and/or upper limbs, muscular pains in lower limbs (hips, legs, knees, feet, etc.), headaches, eyestrain, depression, anxiety, overall fatigue resulted in significant results for both male and female shift workers. Depression and anxiety were higher in female shift/circulation compared to males. Conclusions: The social nets for the health and safety of shift workers should be explored in a variety of ways, including management and supervision of shift sites, attempts to reorganize and improve the shift system, development of workers' health recovery programs, promotion, systematic treatment, and compensation systems.

• The Journal of Korean Medicine
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• v.33 no.3
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• pp.1-9
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• 2012

Objectives: This research was aimed 1) to find out various subjective symptoms cancer patients had, 2) to find out the quantitative difference of symptoms occurring according to the area of cancer, current treatment methods, and relapse of the cancer and 3) to analyze the relationship between the occurrence of symptoms. Methods: This study was a survey about the various subjective symptoms cancer patients had. The subjects were 48 cancer patients in a double-blinded randomized controlled trial about the effectiveness of Korean Red Ginseng (KRG) treatments. Surveys were examined before Korean Red Ginseng (KRG) treatments. The questionnaire consisted of demographic research, patient history and accompanying symptoms. The symptoms part consisted of 4 questions on general symptoms (vertigo, hot flush, rash, insomnia), 2 questions on digestion symptoms (anorexia, dyspepsia), 2 questions on excretions (diarrhea, constipation), and 5 questions on symptoms in different body parts (headache, dryness of lips, chest pain, aphthous ulcer, nose bleeding). The questionnaire was used to research presence of symptoms and relationships between the occurrence of symptoms. Results: A total of 48 patients took part in this survey. Dizziness was the most frequent subjective symptom patients had (64.58%), followed by dry mouth (43.75%), headache (43.75%), insomnia (41.67%), anorexia (37.5%) and chest discomfort (37.5%). The presence of these subjective symptoms was partially related to the patient's history details - type of cancer, method of cancer treatment (chemotherapy, radiotherapy), termination of treatment, presence of pain, fatigue and recurrence, etc. Factor analysis was conducted to analyze the relationship between the occurrence of symptoms. It suggested 5 factors as a result, but there was a limitation that only a low level of correlation was shown among them. Conclusions: We were able to analyze the occurrences and the relationships among them for accompanying subjective symptoms in cancer patients. However the results of the study are limited in that only 48 patients participated. The symptoms in cancer patients showed a tendency for clustering, occurring simultaneously or continuously rather than occurring alone. The study of these symptom clusters is worth further study, for it is similar to the Symptom Differentiation System in Traditional Korean Medicine. For effective approach to the treatment of cancer in Traditional Korean Medicine, further research on the Korean traditional view of cancer patients should be done based on this research, regarding various symptoms and those relationships on a larger scale.

• Journal of Convergence for Information Technology
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• v.10 no.7
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• pp.185-193
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• 2020

This purpose of this study was to investigate the effects of 16-week long-term walking exercise on the feeling, mood state, and life stress of college students. Participations in this study were 50 college students, and 24 Walking Group and 26 Control Group were random sampled to experiment the psychological effect of exercise walking. The experimental design was designed by factorial design by 2×3 repeated measurements. Data collection was conducted for 0week, 8week, 16week of feeling, mood state and life stress of college students. As a result, WG showed a positive increase in feeling status compared to CG. Negative mood state such as tension, anger, depression, fatigue, and confusion have been greatly reduced, vigor has increased, and stress on college student life such as friends, study, economy, future, and values has decreased statistically. The results of this study can be used as a way of coping with the stress of college students to improve their study motivation and quality of life.

• Composites Research
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• v.28 no.4
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• pp.219-225
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• 2015

Air spoiler, which can reduce the drag during operation, can be considered as a possible means to reduce carbon dioxide emission and to increase fuel efficiency. In this study, a composite air spoiler was designed and tested by static and repeated loads. The Green Water Pressure of 0.1 MPa a ship experiences during operation was perpendicularly applied to the air spoiler. Air spoiler was manufactured with sandwich panel which has glass fabric face and balsa core. Multiple sandwich panels were assembled to steel frame by bolt joint. The joint was designed to have bearing failure and examined by static and fatigue tests. Tests showed that the designed joint has enough margin of safety to endure joint failure. The developed sandwich panel to air spoiler is planned to be applied to a large scale commercial ship.

• Journal of Korean Society of Transportation
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• v.34 no.4
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• pp.341-353
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• 2016

Highway is mainly in charge of middle-long distance of vehicular travel. Trip length has shown a growing trend due to increased commute distances by the relocation of public agencies. For this reason, the proportion of driver-driven accidents, caused by their fatigue or sleepiness, are very high on highways. However, existing studies related to accident prediction have mainly considered external factors, such as road conditions, environmental factors and vehicle factors, without driving behavior. In this study, we suggested an accident index (FDR, Fatigued Driving Rate) based on traffic behavior using large-scale Car Navigation path data, and exlpored the relationship between FDR and traffic accidents. As a result, FDR and traffic accidents showed a high correlation. This confirmed the need for a paradigm shift (from facilities to travel behavior) in traffic accident prediction studies. FDR proposed in this study will be utilized in a variety of fields. For example, in providing information to prevent traffic accidents (sleepiness, reckless driving, etc) in advance, utilization of core technologies in highway safety diagnostics, selection of priority location of rest areas and shelter, and selection of attraction methods (rumble strips, grooving) for attention for fatigued sections.

• Korean Journal of Materials Research
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• v.3 no.3
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• pp.253-260
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• 1993

High strength and fracture toughness of Al-Li-Cu alloy(2090 Al alloy) have been achieved by the improvement of melting and casting, extrusion and heat treatment techniques. To establish the sucessful process for semi-industrial scale ingot(20Kg) the following areas have been investigated: (1) Improvement of melting and casting techniques for ingot by introducing atmospheric modifications, vacuum and rotary degassing, and deslagging. (2) The effect of heat treatment on mechanical properties (3) Mechanical characterization by tensile test, fracture toughness test and fatigue crack propagation test. High mechanical properties were found to be intimately related with ingot soundness. Tensile strength of final products varied from 534MPa to 566MPa in peak aged condition while elongation/ductility ranged from 9.0% to 11.9%. From the fracture toughness test with using compact tensile specimen, plane strain fracture toughness($K_{Ic}$) appeared to be 39MPa${\surd}$m in peak aged condition and 23MPa${\surd}$ m in underaged condition. When load ratios of 0.1, 0.3 and 0.5 were given ${\Delta}K_{th}$ was 6.0MPa${\surd}$ m, 5.3MPa${\surd}$ m and 4.3MPa${\surd}$ m respectively.

• The Journal of Internal Korean Medicine
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• v.40 no.4
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• pp.709-722
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• 2019

Objective: The purpose of this study was to report the effect of traditional Korean medicine (TKM) in alleviating the side effects of lung cancer patient undergoing immunotherapy. Method: A 43-year-old man, who was diagnosed with non-small cell lung cancer, received pembrolizumab treatments. The patient was treated with acupuncture and herbal medicine (Geoeoyangpye-tang) to control various uncomfortable symptoms. The degree of pain was measured by the numeric rating scale (NRS). The European Organization for Research and Treatment of Cancer Quality of Life Questionnaire, Core 30 (EORTC QLQ-C30) and the EORTC 13-item lung cancer-specific module (EORTC LC-13 questionnaire) were used to assess the change in the quality of life. Results: After the TKM treatment, the flank pain and arthralgia based on the NRS were significantly improved. Various uncomfortable symptoms such as fatigue, dyspnea, insomnia, and loss of appetite were also significantly improved, based on the EORTC QLQ-C30 and EORTC QLQ-LC13. The size of the primary tumor was decreased during treatment. The disease status was stable radiologically after two months from discharge.

• Journal of the Korea Convergence Society
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• v.12 no.5
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• pp.139-145
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• 2021

Through this study, we intend to study user satisfaction in order to verify whether there is a need for full-scale research, development and commercialization of document viewers in a VR environment. VR content consists of realistic 3D graphics and 360-degree video, and provides a synesthesia experience and immersion. We developed and tested a VR document viewer prototype that can utilize this concept as a document viewing system. It can act as a viewer that provides an interactive viewing environment according to the user's body interaction and the direction of the field of view, and it can be said that the feature of VR document viewer is that it can draw the user's high level of immersion and concentration when using the viewer. The developed prototype was tested in a test group consisting of 100 VR experiences and device owners for about 1 hour and 3 days a day, and then a questionnaire survey in the form of a fixed selection question was conducted. This study is a prototype study of a document viewer suitable for a virtual reality environment, and can lead to a sense of immersion when reading a document, and suggest a new document viewer direction that is effective for visual fatigue and visual perception of the document.

• The Journal of Internal Korean Medicine
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• v.43 no.4
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• pp.769-778
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• 2022

Objectives: The purpose of this study was to report the effectiveness of Korean medicine in the treatment of persistent postural-perceptual dizziness. Methods: A patient with dizziness was treated with Banhabackchulchunma-tang and Gongjin-dan herbal medicines. The severity of symptoms was assessed with a daily visual analog scale (VAS) for dizziness and the frequency of subjective trembling feelings (over 30 minutes). Results: After the treatment, the severity of dizziness was reduced from VAS 5 to VAS 2, and fatigue was improved from VAS 5 to VAS 1. The frequency of subjective trembling feelings was reduced from once every 3-4 days to once every 10 days. Other symptoms, such as dyspepsia, sleep disturbance, and hot flashes, also showed improvement. Conclusion: Treatment with Korean medicine may be an effective option for the treatment of persistent postural-perceptual dizziness.