• Proceedings of the Korean Society of Precision Engineering Conference
• /
• 2005.06a
• /
• pp.1332-1336
• /
• 2005

It could make the LIghtweight Piezoelectric Composite Actuator (LIPCA) damageable by the cyclic large deformation. If the progressive microvoid coalescence of LIPCA interlaminar took place, the decrease of the stiffness and the weakness of stress transmission and fiber bridging effect would make the fatigue characteristics worse suddenly. Therefore, it is required to study the variation of fatigue behavior and interlaminar condition in LIPCA under resonant frequencies. These studies such as the changeable fatigue phase and interlaminar behavior of LIPCA affected by the resonant frequencies should be carried out due to the strong anisotropy of CFRP layer. Hence, these studies are as follows. 1) The residual stresses distribution of interlaminar in LIPCA using the Classical Lamination Theory (CLT). 2) Comparative analysis of interlaminar behavior for the intact LIPCA versus LIPCA containing an artificial delamination during resonant frequency.

• Computers and Concrete
• /
• v.30 no.4
• /
• pp.277-287
• /
• 2022

Due to the scarcity of extortionate experimental data, fatigue failure of the reinforced concrete (RC) element might be achieved economically adopting nonlinear finite element (FE) analysis as an alternative approach. However, conventional implicit dynamic analysis is expensive, quasi-static method overlooks interaction effects and inertia, direct cyclic analysis computes stabilized responses. Apart from this, explicit dynamic analysis may provide a numerical operating system for factual long-term responses. The study explores the fatigue behavior based on a simplified explicit dynamic solution employing nonlinear time domain analysis. Among fourteen RC beams, one beam is selected to validate under static loading, one under fatigue with the experimental study and other twelve to check the detail fatigue behavior. The SWOT (Strength, Weakness, Opportunities, Threats) analysis has been carried out to pinpoint the detail scenario in the adoption of numerical approach as an alternative to the experimental study. Excellent agreement of FE and experimental results is seen. The 3D nonlinear RC beam model at service fatigue limits is truthful to be used as an expedient contrivance to envisage the precise fatigue behavior. The simplified analysis approach for RC beam under fatigue offers savings in computation to predict responses providing acceptable accuracy rather than the complicated laboratory investigation. At higher frequency, the flexural failure occurs a bit earlier gradually compared to the repeated loading case of lower frequency. The deflection increases by 6%-10% at the end of first cycle for beams with increasing frequency of cyclic loading. However, at the end of fatigue loading, greater deflection occur earlier for higher load range because of more rapid stiffness degradation. For higher frequency, a slight boost in concrete compressive strains at an initial stage of loading has been seen indicating somewhat stepper increment. Stiffness degradation in larger loading cycle at same duration escalates the upsurge of the rate of strain in case of higher frequency.

• Korean Journal of Occupational Health Nursing
• /
• v.9 no.2
• /
• pp.86-93
• /
• 2000

This study was conducted to find out the degree of tiredness, accumulated tendencies of fatigues in accordance with 3 types of circadian rhythms and 3 types of perceived fatigue signs such as physical, psychological and neurosensory aspects in before and after work at night. Samples were chosen from the 217 intensive care units nurses working in 13 general hospitals which had 3 shift rotating systems, Data were collected from November to December in 1999. Two hundreds seventeen respondents were classified by 3 circadian types such as 59 morning, 110 middle and 48 evening. Circadian type was measured by the circadian type scale which was designed by ${\ddot{O}}stberg$ and Home (1976). in order to estimate the level of tiredness, the investigator used the fatigue checklist designed by the Labor and Health Institute of Japan(1970). Analysis was done by frequency a percentages, ${\chi}^2$ test and repeated measures ANOVA test. The result of this study were as follow: 1. In the general characteristics of the subjects circadian types, moderate type had the large proportion at 50.7% and morning type had 27.2% and evening type had 22.1%. 2. According to the 3 types of fatigue signs, the highest general tendency was 'General weakness' and 'Feeling of headsore' for physically perceived sign, 'Drowsiness' for psychological sign, and 'Uncomfortableness in sight seeing' for neurosensory sign. 3. The most frequently complained fatigue were observed in physical symptoms among physical, mental, and neurosensual symptoms. The percentage of complained was higher after night work than before the work started. 4. There was not any statistical significant difference between the circadian type and the degree of physical, mental, neurosensory fatigue. 5. There was not any statistical significant difference in regarding to each date of night shift except difference between 1st and 2nd days of fatigue perceived physically. Therefore, the study concluded that the fatigue perceived by night shift nurses might be related with shift working condition rather than circadian types.

• Journal of Korean Academy of Nursing
• /
• v.33 no.1
• /
• pp.71-78
• /
• 2003

Purpose: The study was done to identify the relationship of treatment side effects, family support, and quality of life in patients with cancer, and factors influencing quality of life. Method: A convenience sample of 106 patients who were receiving cancer treatment at W hospital were interviewed using the Side Effects scale by Hur, Family Support scale by Kang, and QOL scale by Ro. Result: Results indicate that women experienced more severe side effects than men. There was a negative relationship between side effects and quality of life, and a positive relationship between family support and quality of life. The most bothersome side effects were changes in taste and appetite, followed by general weakness and fatigue. Side effects such as loss of hair, nausea, dizziness, numbness, pins and needles in fingers and toes, and dry mouth were also experienced. General weakness and family support were analysed as to whether they were factors influencing quality of life. Conclusion: The results revealed that relieving general weakness should be given high priority in nursing interventions for patients undergoing cancer treatment. In addition, nursing programs should be developed that can reinforce family support.

• The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology
• /
• v.19 no.2
• /
• pp.249-255
• /
• 2006

Object : The tinnitus is a very common otorhinolaryngologic disease. But, we don't know the exact cause and the healing method of that. Treatment : We have three cases report of the patients who have tinnitus. Their tinnitus is diagnosed weakness of the kidney because of chronic symptoms, the Cheek pulse weakening, the whole body weakness, fatigue. So we treat them with herbal medicine and Cervi Pantotricuhum Cornu herbal-acupunture. Result : In the result, their symptoms is reduced. So we report these cases for the improvement of tinnitus treatment efficacy and making the best use of Cervi Pantotricuhum Cornu herbal-acupunture.

• The Journal of Internal Korean Medicine
• /
• v.38 no.2
• /
• pp.235-239
• /
• 2017

This case study describes the effect of Bojungikki-tang on chemotherapy-induced alopecia. Alopecia is a well-documented cause of distress to patients undergoing cancer treatment, but no approved pharmacological treatment exists for chemotherapy-induced hair loss. A 70-year-old female diagnosed with a cholangiocarcinoma and liver metastasis received chemotherapy, including gemcitabine and cisplatin, every three weeks. As a result of the continuous chemotherapy, she suffered various toxicity-related side effects, including bone marrow suppression, general weakness, nausea, peripheral numbness, and hair loss. Bojungikki-tang was initially administered to improve the patient's general weakness and fatigue. After three months of treatment, the patient's hair loss and general condition improved, and the color of the new hair was dark, despite the chemotherapy. The treatment did not improve other symptoms, such as bone marrow suppression and peripheral numbness. This case suggests that Bojungikki-tang could have a beneficial effect on chemotherapy-induced alopecia.

• The Journal of Internal Korean Medicine
• /
• v.22 no.3
• /
• pp.299-307
• /
• 2001

Objectives: Fatigue is a common symptom experienced by many people who visit Oriental medical clinics or hospital. However, there has been little study about the fatigue in the Oriental medical academic world. For this reason, we attempted to investigate the present status of fatigue of outpatients, and its relation with Health Practice Index(HPI). Methods: The subjects were 63 outpatients who visited the Tonification Clinic in Kyunghee Oriental Medical Center between January 1, 2001 and July 31, 2001. Their chief complaint was fatigue and they did not have any physical or mental problem. They were given a questionnaire which included questions reflecting general characteristics, fatigue degree and health habits. We measured degree of fatigue by Chalder scale et al. Health habits were investigated about 5 articles out of 'Breslow 7 Health habits'. Results: Among the subjects, 48 people(76.2%) were considered as 'fatigue patients' by the Chalder scale. Of this 48 fatigue patients, 27 people(56.3%) had manifested fatigue for more than 6 months. The average of scale II for all the patients was 14.05, which indicates moderate degree of fatigue. They complained fatigue, drowsiness and general weakness, dryness and discomfort of the eyes, headache, shoulder pain and neck stiffness, dizziness, heat in the upper part of the body, and poor concentration. There were no differences in degree of fatigue according to Health habits including exercise or not, smoking or not, the frequency of drinking, hours of sleeping, and body mass index. Conclusions: Many people complain fatigue symptom. Therefore doctors should have more interest in fatigue and care. This study can provide standards of prognosis of fatigue patients. Also prospective studies are needed to find relationship between health habits and fatigue degree.

• Journal of Physiology & Pathology in Korean Medicine
• /
• v.18 no.5
• /
• pp.1242-1253
• /
• 2004

Leukemia is a blood disease that occurs in the abnormal process of leukocyte maturation. Its main medical treatment is chemical therapy and bone medical transplant. But its treatments give rise to ill effects and sequela. At present, the cause of leukemia is not fully understood. But oriental concept of curing leukemia is the holistic thinking that emphasizes the unity, wholeness, and the relationship between the human organs, including western medical concept of blood cause. So it is estimated that holistic medical treatment in oriental medicine could present new medical way of curing leukemia. I read over the diary on struggles against leukemia, survey on the leukemia patients, and, medical charts in the oriental clinics that treated in the holistic way, and I interviewed the leukemia patients. With these materials, I classified the early main attacking symptoms according to the chief complaints of one hundred leukemia patients. With these results collected, I present new alternative treatment by oriental medical diagnosis. The chief early complaints that leukemia patients give are fatigue, enervation, cold, contusion, fever, high fever, sweating at sleep, myalgia, arthralgia, and dizziness, in order of main symptoms. Fatigue occurs mainly by spleen and stomach weakness and marrow shortage. So it is estimated that It is important to treat the spleen that is responsible for supplementing the marrow. Because the leukemia patients have anemia and hemorrhage, to treat the spleen is important for hematopoiesis and controlling blood. In case of cold, it penetrates into the body when the body is weak. So its treatment is to increase body's health. But the cause of fever is difficult to classify into outer cause and inner cause. But in case of children under 14 years old, fever is the main sypmptom. I think this is because children have the body with pure vital energy. Hemorrhage is thought to be the result of yin-lack and heat-miasma of spleen and stomach channels. Contusion occurs from the qi-weakness and the not-controlling-blood. Sweating at sleep is from the yin-weakness. It is found with all weak symptoms. Dizziness is from the yin-blood impairment. Weight-loss is from the marrow shortage. Myalgia and arthralgia is mainly from inner weakness, not outer maisma. Most leukemia patients have the idea that holistic treatment of leukemia could be of assistance and give help to the low immunity. So it is expected that holistic medical treatment could contribute to knowing the cause and treatment of leukemia, and give people reliability on oriental medical treatment, through the profound diagnosis of leukemia.

• Proceedings of the Korea Concrete Institute Conference
• /
• 2003.05a
• /
• pp.469-474
• /
• 2003

Recently, to overcome the disadvantages of RC decks, advanced countries such as Japan and USA, and Europe are using prestressing connection precast decks and loop connection precast decks. The prestressing connection precast deck, however, has a weakness against steel corrosion, because of unreliable enforced grouting. The relatively low loading and fatigue capacities of the loop connection precast deck make it difficult to be used for the bridge that requires high fatigue resistance due to the frequent over loaded vehicles. This research proposes the improved connecting method for the precast decks to minimize its shortcomings based on both numerical analyses and full scale model tests. The proposed method maximizes the advantages of precast decks and extends it's service life.

• Annals of Clinical Neurophysiology
• /
• v.23 no.1
• /
• pp.53-55
• /
• 2021

Congenital myasthenic syndromes (CMSs) are rare genetic disorders characterized by weakness and fatigue resulting from impaired neuromuscular transmission. Genetic testing can confirm the diagnosis for some types of CMS; however, variations in genotype, clinical phenotypes, age at disease onset, and responses to treatment make diagnosis very difficult. Here we present two adult patients who had significant decremental responses in repetitive nerve stimulation testing and multi-minicore pathology, and who responded to treatment with a cholinesterase inhibitor.