• Proceedings of the SAREK Conference
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• 2006.06a
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• pp.795-800
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• 2006

A common approach to achieve better thermal comfort with hydronic radiant floor heating system is supply water temperature control. This is the control method through which supply water temperature is varied with outdoor temperature. In this study, a comprehensive, yet simple calculation method to find optimum supply water temperature is evaluated by combining heat loss from the building and heat emission from the hydronic radiant floor heating system. And then the control performance of suggested calculation method is confirmed through experiment. It is shown that indoor air temperature is stably maintained around the set point.

• Transactions of the KSME C: Technology and Education
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• v.1 no.1
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• pp.129-138
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• 2013

Constant airflow should be kept in order to operate a constant-fired boiler of thermal power plants. Main Bearing Assembly Unit which rotates the ventilation fan does very important role to maintain constant airflow. However, the demand to the output of power is getting increased while the quality level of coal is getting worse than the initial level of design criteria. Especially cost wise operation considering increasing output and the difficulty to supply good quality coal drive increasing supply of low quality coal. As a result, the service life of Main Bearing Assembly is getting shorter till 2~3 years which is just a half of the life of original design. In this study, what causes to shorten the service life of Main Bearing Assembly Unit is analyzed through the reverse engineering and analysis and how to improve the service life more than two times to current situation is explained.

• Journal of Acupuncture Research
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• v.23 no.4
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• pp.101-113
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• 2006

Objectives : This study was designed to evaluate the effect of electroacupuncture at ciliao(BL32) on voiding pattern and uroflowmetry of patients with functional voiding disease. Methods Subjects were voluntarily recruited by newspaper·s and internet. All the subjects were confirmed as International Prostatism Symptom Score(IPSS), uroflowmetry, voiding diary, symptom. The acupuncture therapy was performed 3 times a week for 3 weeks by oriental medical doctor at hospital. Acupuncture points were BL32. The patient's symptoms were assessed before and after 3 weeks treatments by IPSS. Uroflowmetry for 5minutes and voiding diary for 48 hours was measured before and after 3 weeks treatments. Results : The results were as follows; 1. After 3 weeks compared to the pre-treatment, IPSS(QOL) scores were significantly unproved. 2. After 3 weeks compared to the pre-treatment, mean voiding volume, min voiding volume and mean voiding time on voiding daiary was significantly improved. 3. After 3 weeks compared to the pre-treatment, max flow velocity and mean flow velocity on uroflowmetry in spite of increase of voiding volume show a statistically significant difference. 4. Acupunctue had hardly some side effect compared to operation and medicines and was economical. Conclusion : This study suggests that acupuncture treatments can be applicable to improve symptoms in the patients with functional voiding disease. Further study on the acupuncture and other acupoints in the patients with functional voiding disease is recommended.

• Journal of Acupuncture Research
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• v.23 no.3
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• pp.155-163
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• 2006

Objectives : This study was designed to evaluated the effect of electro acupuncture on Heart Rate Variability of Patients with functional voiding disease. Methods: Subjects were voluntarily recruited by newspapers and internet. Electro acupuncture was performed three times a week for 3 weeks. Acupuncture point for EA group was B32, Electrical stimulation frequency was 2Hz, duration 20min, and intensity was up to pain threshold according to patients. The patients' Heart Rate Variability was measured before, after 3 weeks of treatment for 5 minutes. Results : In time domain analysis, There were significant increase of SDNN and RMSSD(p<0.05) after 3 weeks treatment. In frequency domain analysis, There were significant increase of LF and LF /HF ratio(p<0.05) after 3 weeks treatment. There were no significant changes in other components of heart rate variability. Conclusion : This study suggests that electroacupuncture treatments can be applicable to improve autonomic nervous system in patients with functional voiding disease.

• Journal of Acupuncture Research
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• v.23 no.3
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• pp.77-90
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• 2006

Objectives : To evaluate the analgesic effect of electroacupuncture on Choksamni (ST36) in the collagen-induced arthritis rats and investigate the role played by serotonergic receptor subtypes $(5-HT_{1A},\;5-HT_{1B},\;5-HT_4)$ in the antinociceptive effect of electroacupuncture in the thermal hyperalgesia test. Methods : Immunization of male Sprague-Dawley rats with bovine type II collagen emulsified in incomplete Freund's adjuvant, followed by booster injection 14 days later induced collagen-induced arthritis (CIA). The thermal hyperalgesia was evaluated weekly with tail flick latency (TFL). In the fourth week after first immunization. EA stimulation (2Hz, 0.07mA, 0.3ms) was delivered into Choksamni for 20 minutes. We measured the analgesic effect of EA with TFL afer intraperitoneal injection of normal saline, WAYl00635, SB216641 and GR125487. Results : TFLs were gradually decreased in CIA as time elapsed after the immunization of arthrogenic collagen and the maximum value was reached from third to fifth week. EA stimulation on ST36 inhibited chronic inflammatory pain induced by CIA. The analgesic effect of EA was inhibited by pretreatment of $5-HT_{1A}$. antagonist (WAYl00635), $5-HT_{1B}$ antagonist (SB216641) and $5-HT_4$ antagonist (GR125487). Conclusion : Electroacupuncture has the analgesic effect on chronic inflammatory pain and its mechanism was mediated by $5-HT_{1A}$, $5-HT_{1B}$ and $5-HT_4$.

• The Journal of Korean Medicine
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• v.26 no.2 s.62
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• pp.231-240
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• 2005

Objectives: In order to investigate the efficacy and safety of the newly developed herbal medicine Jetongdan, a placebo­controlled, randomized clinical trial of patients with osteoarthritis of the knee was undertaken. Methods: Data were obtained from 80 patients with OA of the knee. After enrollment, they were asked to answer a disease-specific questionnaire (Western Ontario and McMaster Universities (WOMAC) OA index) and analyzed with the erythrocyte sedimentation rate (ESR) in order to evaluate the efficacy of Jetongdan, and analyzed for aspartate transaminase (AST) level, alanine transaminase (ALT) level, blood mea nitrogen (BUN) level, and creatinine (Cr) level in order to evaluate the safety of Jetongdan. Results: The liver function and renal function did not deteriorate after treatment with Jetongdan. Composite WOMAC score and physical function subscale was improved, but pain subscale, stiffness subscale, and ESR were not improved by. This was possibly because the baseline characteristics of the two groups were not homogenized after randomization. Conclusions: Jetongdan could be a promising treatment option for osteoarthritis of the knee. Further study in a larger population with appropriate severity grades is recommended.

• Journal of Korean Society of Coastal and Ocean Engineers
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• v.17 no.1
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• pp.41-46
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• 2005

The seismic response characteristics of a port structure were investigated by the earthquake analyses of the structure subjected to high-, low-frequency component, and Uljin earthquakes. In the Fluid-Structure-Soil Interaction(FSSI) analysis, the fluid is modeled by the 4-node quadrilateral element which is a modification of a structural plane element, and the port structure and foundation is modelled by the plane strain element. Since the present method directly models the fluid-structure-soil interaction system using finite element method, it can be easily applied to the dynamic analysis of a 2-D fluid-port-soil system with complex geometry. The results of the seismic coefficient. added mass, and FSSI methods are compared. The results showed that the earthquake with high frequency components more affects the seismic response of the structure than that of low frequency components.

• Journal of Acupuncture Research
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• v.22 no.6
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• pp.219-228
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• 2005

Objectives : to evaluate the effects of Jetongdan, the newly developed herbal medicine, on the quality of life in patients with osteoarthritis of knee Methods : Placebo-controlled, randomized clinical trial on the 80 patients with osteoarthritis of the knee was fulfilled. After enrollment, they took medication as they enrolled. And they were asked to answer the questionnaires (Korean Health Assessment Questionnaire (KHAQ), Lequesne's functional index (LFI), visual analogue scale (VAS)) and analysed with the erythrocyte sedimentation rate (ESR) at baseline, after 4 weeks and 8 weeks of medication. Results : Total KHAQ score, some categories of KHAQ like hygiene, activities were significantly improved after 8 weeks of medication. And the change of the KHAQ score was significantly correlated with the change of VAS. But LFI, VAS, ESR level was not significantly improved, and it was considered because of the short medication period and small size of study population. Conclusion : In conclusion, Jetongdan could improve the health-related quality of life in patients with osteoarthritis of knee. Further study in the large population, in long period were recommended.

• Journal of Acupuncture Research
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• v.24 no.1
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• pp.29-38
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• 2007

Objectives : The objective of this study was to research delayed growth with acupuncture and moxibustion treatment. Methods : We search the oriental medical literature related to delayed growth, especially loose skull, pigeon chest(龜胸), turtle back(龜背), five kinds of flaccidity(五軟), five kinds of retardations(五遲) and infantile malnutrition(疳證). Results : 1. Loose skull is treated with moxibustion therapy of CV8(神厥) and two points(1.5cm upper and under of CV8) 2. Pigeon chest(龜胸) is treated with moxibustion therapy of GB38(外丘), ST18(乳根) and 6 points around of STl7(乳中). 3. Turtle back(龜背) is treated with moxibustion therapy of BLl3(肺兪), BL15(心兪) and BLl7(膈兪) 4. Acupuncture therapy of five kinds of flaccidity(五軟) was rare. but there are one case to stimulate Hwatahyeopcheok point using plum-blossom needle. 5. Five kinds of retardations(五遲) is treated with moxibustion therapy of BLl5(心兪) and two point of medial malleolus 6. Infantile malnutrition(疳證) is treated with acupuncture therapy of the spleen channel and stomach. channel, therapy using three-edged needle, cutting therapy(LUlO(魚際) and Sabong), moxibustion therapy(LRl3(章門) and BL2l(胃兪), and Ch'una therapy. Conclusion: We expect that acupuncture and moxibustion treatment of delayed growth will be applied practically in clinical medicine due to further study on delayed growth.

• Maxillofacial Plastic and Reconstructive Surgery
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• v.17 no.4
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• pp.456-461
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• 1995

Tuberculosis, a chronic infectious granulomatous disease, is presumed to be quite a rare entity. Because of the development of chemotherapy and the improvement of nutritional conditions, incidence of tuberculosis have reduced. For these reasons, tuberculosis may be overlooked in the differential diagnosis whenever dealing with a submandibular swelling. Diagnosis of tuberculous lymphadenitis consists of historical data, physical findings, laboratory tests and histologic examination. The treatment of choice seems to be surgical excision and long term antituberculosis chemotherapy. Surgery provides a rapid tissue diagnosis, because the histological examination of the excisional biopsy is the most reliable diagnostic test. This is the report of a case of tuberculous cervical lymphadenitis on left submandibular area with no evidence of the involvement of lung.