• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2001.05a
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• pp.66-70
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• 2001

The partial discharge testing is widely used in diagnostic measuring technology because it gives low stress to power equipment which is undertaken tests. Therefore it is very useful method compare to previous destructive methods and effective diagnosis method in power system that requires on-line/on-site diagnosis. But partial discharges have very complex characteristics of discharge pattern, so it is required continuous research to development of precise analysis method. In recent, the study of partial discharge is carrying out discover of initial defect of power equipment through condition diagnosis and system development of degradation diagnosis using HFPD(High Frequency Partial Discharge) detection. In this study, simulated system is manufactured and HFPD occurred from those simulator is measured with broad-band antenna in real time, the degradation grade of system is analyzed through produced patterns in simulated target according to the AI/statistics processing.

• Anxiety and mood
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• v.11 no.2
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• pp.143-148
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• 2015

Objective : This study examined benzodiazepine prescription patterns of outpatients visiting the psychiatry department in a single general hospital in Korea. Methods : A retrospective descriptive analysis of benzodiazepine prescriptions was performed on a database from 2014 in a general hospital in Korea. We analyzed the following factors of adult outpatients: demographic factors such as sex and age, amount of benzodiazepine prescribed, treatment duration, and diagnosis based on the ICD-10. Results : In 2014, benzodiazepines were prescribed to 46.4% of the outpatients. Percentage of benzodiazepine prescription increased with age and was highest in the age group 40-59 years. Prescription was more prevalent in women and the prescription percentage increased by treatment duration. Patients with the F4 diagnosis (neurotic, stress-related and somatoform disorders) were the most highly prescribed group. For all diagnosis groups, prescription was more prevalent in females or similar for both sexes except for patients with F5 diagnosis (behavioral syndromes associated with physiological disturbances and physical factors), with males being more predominant. Conclusion : Despite the concern regarding the rate of benzodiazepine prescription and administration to geriatric patients, long-term prescription and usage among older patients is still prevalent.

• Journal of the Korean Institute of Electrical and Electronic Material Engineers
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• v.24 no.3
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• pp.208-214
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• 2011

In this thesis, the partial discharge according to applied voltage and variations of cross-sectional area and length of the conductor related to general condition for using cable was measured in order to study degradation diagnosis for 2-Core cable of the PVC insulator used in industrial fields for other safety installations. Also the thermal degradation conditions under various installation circumstances of cables were studied by assuming degradation conditions with each different degradation rate (50%, 67%, 100%) such as variation in degradated temperature, thermal exposure time, normal state, partially degradated state and overall degradated state for thermal degradation diagnosis. The quantity of electric discharge (V-Q) according to applied voltage was measured for measurement of inception voltage and extinction voltage. The quantity of electric discharge and the number of electric discharge (Q-N) were measured with applied voltage kept constantly. In addition, pictures were taken using SEM (scanning electron microscope) to compare the surface of external insulator to degradated state of internal insulator according to thermal degradation temperature and also compare the surface of external insulator to degradated surface state of internal insulator according exposure time of cables to thermal stress.

• Journal of Acupuncture Research
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• v.23 no.3
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• pp.231-239
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• 2006

Functional medicine is a system which utilizes certain investigative and treatment methods that are primarily oriented toward the recognition of functional disorder. Functional disorders take place on an energetic plane. This plane is not capturable using our regular investigatory techniques, such as X -ray. ultrasound, computer tomography and laboratory analyses. The 7-zone-diagnostic system(VEGA-DFM 722 and ABR-2000, etc) is a diagnostic device Which applies pulse signals to predetermined bodily locations. Applying alternating positive and negative stress to tissues with positive and negative pulses first manifests itself as negative and positive wave forms. The skin has many functions as an organ. It is the organism's interlace with the outsider world. Hence, the manner in which the skin reacts to external stimuli reflects the current state of the organism(as meridian systems). This system make a diagnosis of functional disorder or some typical organic diseases include stress of the mind or the body, and the energetic situation, reserves. We are known a disorder or disease throw the result chart. This result chart contain disorder flow wave forms and some valuable diagnostic hints (letters ; S, OM, RA, etc). In spite of this 7-zone-diagnostic system that is applied plentifully in the clinical application, there is not a statistics which is suitable. Therefor we must carry out many various research in the future.

• Proceedings of the KIEE Conference
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• 2001.11c
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• pp.180-183
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• 2001

In modem city life, the citizen get insufficient exercise and has high levels of stress. Increased Stress causes such minor things as tiredness, disease and mental fatigue, and increase brain blood pressure too. In this paper trying to design the multi-functional blood pressure monitor with airo-dynamic brain hemokinesis improvement function. So this system have developed for the improvement of flows in the capillary blood vessel of head and limbs. Also This system is able to measure brain blood pressure(BBP) which need diagnosis circulation state of brain blood. So, we extracted correlativity of blood pressure(BP) and BBP through clinical experiment. We confirmed that compare factor of BP with BBP is more useful factors for diagnosis state of brain hemokinesis.

• Clinics in Shoulder and Elbow
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• v.23 no.2
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• pp.105-108
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• 2020

Stress fractures of the acromion and scapular spine are well-known complications following reverse total shoulder arthroplasty. However, these fractures in patients with massive rotator cuff tear or cuff tear arthropathy are extremely rare, and the pathogenesis, clinical features, diagnosis, and treatment of these fractures are poorly understood. We report a case of bilateral stress fracture of the posterior angle of the acromion in a patient with massive rotator cuff tear and discuss the pathogenesis, clinical manifestation, and treatment with a review of the literature.

• Journal of the Korean Institute of Electrical and Electronic Material Engineers
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• v.12 no.1
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• pp.11-17
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• 1999

Aging characteristics of the crosslinked polyethylene have been measured after applying electrical, thermal and combined stresses. ICP and FT-IR measurements confirmed diffusion of low molecular weight components such as antioxidant and presence of carbonyl group. Carbonyl group of aged crosslinked polyethylene under combined stress was detected by FT-IR. As deterioration of the crosslinked polyethylene progresses, crystallinity degree and density decrease. Also, dielectric properties have been measured by tan $\delta$ and $\varepsilon$$_{r}$ measurements. The three-parameter Weibull distribution was found to be the best suited among other probabilistic distribution representing the dielectric breakdown strength of aged crosslinked polyethylene. The scale parameter and location parameter decreases as the applied stress increases. The shape parameter increases as the stress increases.s.

• Journal of the Korean Society for Precision Engineering
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• v.10 no.3
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• pp.69-80
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• 1993

It is important to prevent roll failure in hot rolling process for reducing maintenance coat and production loss. Roll material and rolling conditions such as the roll force and torque have been intensively investigated to overcome the roll failures. In this study, a computer roll life prediction system under working condition is developed and evaluated on IBM-PC level. The system is composed and fatigue estimation models which are stress analysis, crack propagation, wear and fatigue estimation. Roll damage can be predicted by calculating the stress anplification, crack depth propagation and fatigue level in the roll using this computer model. The developed system is applied to a work roll in actual hot rolling process for reliability evaluation. Roll failures can be diagnosed and the propriety of current working condition can be determined through roll life prediction simulation.

• Korean Journal of Health Education and Promotion
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• v.21 no.1
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• pp.319-328
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• 2004

The purpose of this study was to examine the relation between thoracic scoliosis and gastroenteric disorder. In this article, We surveyed sixty two patients and investigated through a questionnaire the health and meal habits, digestive trouble levels, stress levels(BEPSI-K), and the stress response index(SRI). Participants were classified according to each group in over $10^{\circ}$(vertebral scoliosis), under $10^{\circ}$(functional scoliosis) and made a diagnosis of X-ray of scoliosis grade. The data was took statistics on two group by independent t-test, chi-square test with SPSS/PC+ 10.0 program. The statistically significance was a p＜.05 and the following results were obtained； 1. In general characteristics, The thoracic scoliosis was as many as women, weight 50∼60kg, height 160∼170cm, married person. 2. Relations between health and meal habit with thoracic scoliosis was not statistically significant(p＞.05). 3. Relations between thoracic scoliosis and digestive trouble level was statistically significance (p＜.05). 4. Relations between thoracic scoliosis and incidence rate of internal disease was statistically significant(p＜.05). 5. Relations between thoracic scoliosis and stress(BEPSI-K) was statistically significant(p＜.05). 6. Relations between thoracic scoliosis and stress(SRI) was statistically significant(p＜.05). These results lead us to the conclusion that thoracic scoliosis influences digestive trouble, incidence rate of internal disease and stress. However, there results are not easy to explain because of the limitations of a few subjects and a single comparison. Therefore, further research on this study thoroughgoing inspection would clarify the association of thoracic scoliosis and gastroenteric disorders.

• Proceedings of the KWS Conference
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• 2002.10a
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• pp.668-674
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• 2002

Structural integrity assessment is indispensable for preventing catastrophic failure of industrial structures/components/facilities. This diagnosis of operating components should be done periodically for safe maintenance and economical repair. However, conventional standard methods for mechanical properties have the problems of bulky specimen, destructive and complex procedure of specimen sampling. Especially, the mechanical properties at welded zone including weldment and heat affected zone could not be evaluated individually due to their size requirement problem. So, an advanced indentation technique has been developed as a potential method for non-destructive testing of in-field structures. This technique measures indentation load-depth curve during indentation and analyzes the mechanical properties related to deformation such as yield strength, tensile strength and work-hardening index. Also indentation technique can evaluate a residual stress based on the concept that indentation load-depth curves were shifted with the direction and the magnitude of residual stress applied to materials. In this study, we characterized the tensile properties and welding residual stress of various industrial facilities through the new techniques, and the results are introduced and discussed.