• Journal of the Korean Society of Manufacturing Process Engineers
• /
• v.15 no.4
• /
• pp.134-140
• /
• 2016

Main Spindle System has effect on performance of machine tools and working quality as well as is required of high reliability. Especially, it takes great importance in producing automobiles which includes a large number of working processes. However, main spindle unit in Machine tools are often cases where damage occurs do not meet the design life due to driving in harsh environments. This is when excessive maintenance and repair of machine tools or for damage stability has resulted in huge economic losses. Therefore, this studying propose a method of accelerated life test for diagnosing and prognosis the state of life assessment main spindle system. Time status monitoring of diagnostic data - through the analysis of the frequency band signals were carried out inside the main spindle bearing condition monitoring and fault diagnosis.

• The Journal of Pediatrics of Korean Medicine
• /
• v.31 no.2
• /
• pp.14-24
• /
• 2017

Objectives The study was conducted to evaluate the recent treatment and study trends of tic disorder by reviewing domestic and international randomized controlled studies. Methods The acupuncture treatment on tic disorder randomized control study articles (published by June 10th, 2016) were selected from seven academic literature archives; NDSL, OASIS, KTKP, Pubmed, J-STAGE, CNKI, and CINAHL. Results Ten articles were identified after searching. These studies were analyzed by year, diagnostic criteria, intervention, evaluation criteria, treatment points, treatment effect, treatment duration, and 'Risk of Bias' assessment. Conclusions According to the articles, acupuncture was effective in treating tic disorder. However, additional well-designed randomized controlled studies will be required to justify the effectiveness of acupuncture treatment on tic disorder.

• Journal of Veterinary Clinics
• /
• v.18 no.4
• /
• pp.459-464
• /
• 2001

Excretory urography is a procedure where opacification of the kidneys, renal pelvic diverticula, ureters, and urinary bladder is a result of renal excretion of an intravenously administered iodinated contrast agent providing both anatomical and functional assessment. And ultrasonography is a non-invasive modality to evaluate the important anatomic information concerning the size, shape, and internal architecture of kidney even in the presence of impaired renal function or abdominal fluid. We describe four dogs with urological signs diagnosed with excretory urography and ultrasonography. Parients showed a variety of clinical signs including vomiting, hematuria, anorexia, abdominal pain, and abdominal distension. The hydronephrosis was diagnosed in case 1, 2, and 3 that had pelvic dilation, dilation of pelvic recesses, ureteral dilation. In case 3, proximal ureteral rupture was diagnosed with evidence of contrast media leakage was seen in proximal ureter. In case 4, the rupture of urinary bladder was diagnosed with leakage of contrast media through its ventral portion.

• The Korean Journal of Nuclear Medicine
• /
• v.39 no.2
• /
• pp.107-113
• /
• 2005

Pharmacologic stress testing for myocardial perfusion imaging is a widely used noninvasive method for the evaluation of known or suspected coronary artery disease. The use of exercise for cardiac stress has been practiced for over 60 years and clinicians are familial with its using. However, there are inevitabe situations in which exorcise stress is inappropriate. A large number of patients with cardiac problems are unable to exercise to their full potential due to comorbidity such as osteoarthritis, vascular disease and pulmonary disease and a standard exercise stress test for myocardial perfusion imaging is suboptimal means for assessment of coronary artery disease. This problem has led to the development of the pharmacologic stress test and to a great increase in its popularity. All of the currently used pharmacologic agents have well-documented diagnostic value. This review deals the physiological actions, clinical protocols, safety, nuclear imaging applications of currently available stress agents and future development of new vasodilating agents.

• Proceedings of the KIEE Conference
• /
• 2001.11b
• /
• pp.149-152
• /
• 2001

In this work, we have conducted insulation aging assessment and maintenance for submarine medium voltage power cable systems to discriminate and maintain bad cables economically. We have found that aging status of submarine cable systems are very poor and in progress. We have found that insulation status were improved with the replacement of cable terminations. We have confirmed with the electrical and structural analysis of terminations, that the poor aging status of cables are mainly caused not by the cable insulations but by the aging of cable terminations. From the above results, we have also confirmed that the domestic diagnostic system is successful and convenient for the discrimination and maintenance of the damaged cables economically.

• Journal of the Korea Safety Management & Science
• /
• v.17 no.4
• /
• pp.207-212
• /
• 2015

When performing Chest x-ray examination to pregnant woman, normally we shield back side of abdomen. In this situation, scattered rays made by equipment and surrounding structure can enter front side of abdomen. Therefore, in this study, we evaluate suitability of abdomen shield especially to pregnant woman. In case of One shielding material placed back of abdomen, the measured value is $0.676{\pm}0.19uSv/hr$. Two shielding material is $0.764{\pm}0.04uSv/hr$. Three is $0.685{\pm}0.16uSv/hr$. The exposure dose inferred in this study does not excess annual effective dose limit. But It is not mean absolute safety. So we have to minimize occurrence of stochastic effect of radiosensitivity by shielding front side of abdomen of pregnant woman in clinic.

• Korean Journal of Bronchoesophagology
• /
• v.17 no.1
• /
• pp.19-22
• /
• 2011

Endoscopic ultrasound in the diagnosis of esophageal carcinoma is an indispensable procedure, not only to discuss the preoperative staging of the lesion, but also to evaluate the therapeutic effect of chemo-radiation therapy. The recent increase in the incidence of superficial esophageal cancer and promising developments in potentially curative endoscopic therapies have placed EUS to a central position in decision making. Recent data have called into question the staging accuracy of EUS to distinguish mucosal from submucosal lesions, particularly in patients with early disease. In those cases, diagnostic endoscopic resection may be useful for staging and curative in superficial lesions. Nonetheless, EUS has been regarded as the most accurate staging tool and should be performed to identify potential candidates for endoscopic resection.

• Sleep Medicine and Psychophysiology
• /
• v.11 no.1
• /
• pp.5-9
• /
• 2004

Obstructive sleep apnea (OSA) is a common disorder characterized by recurrent cessation of breathing due to complete or partial upper airway occlusion during sleep. The incompetent tone of palatal, pharngeal, and glossal muscles which fail to maintain airway patency during sleep causes narrowing of the airway dimension and increased resistance of breathing. The identification of the sites of upper airway obstruction in patients with OSA is important in understanding the pathogenesis and deciding the treatment modality of snoring and/or OSA. Various upper airway imaging modalities have been used to assess upper airway size and precise localization of the sites of upper airway obstruction during sleep. Dynamic imaging modalities enabled assessment of dimensional changes in the upper airway during respiration and sleep. This article focused on reviews of various upper airway imaging modalities, especially dynamic upper airway imaging studies providing important information on the pathogenesis of OSA.

• Transactions on Electrical and Electronic Materials
• /
• v.7 no.6
• /
• pp.324-329
• /
• 2006

As the average usage period of transformers increases, it is becoming increasingly necessary to know the internal condition of transformers. It is therefore critically important to establish monitoring and diagnostic techniques that can perform transformer condition assessment. Frequency response analysis, generally known as FRA, is one of the technologies to diagnose transformers. Using case studies, this paper presents the effectiveness of FRA as measurements for detecting transformer failures. This paper introduces the fact that FRA waveforms have useful information about diagnosis of failure on core earths and winding shield, and that the condition outside transformers can affect frequency response characteristics.

• Proceedings of the Korean Institute of Building Construction Conference
• /
• 2015.05a
• /
• pp.236-237
• /
• 2015

Concrete is the one of the most widely used in every country as a structural materials. On the other hand, a lot of fire incident has been occurred all over the world. But maintenance methods such as inspection and diagnostic methods, design methods, quality control methods for the purpose of improving the performance of concrete structures damaged by fire has made in its own way. Therefore, the purpose of this proposal of new working item is is to ensure the safety of the concrete structures damaged by fire in the field of assessment of damage, design, repair methods and so on through the International Organization for Standardization.