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정상화,신상문,김태호,서호진,박진완 朝鮮大學校 機械技術硏究所 2007 機械技術硏究 Vol.10 No.1
Methods of major transport system used in many industry fields are conveyor belt, magnetic levitation system and indexing system. It is an indispensable device in many fields and especially it is very important in the factory automation. However, the conventional transport system can damage precision optical components by the contact force and destroy the inner structure of semiconductor by the magnetic field. The new transport system for transporting without damage is required and the ultrasonic wave transport system has been proposed to replace the conventional transport system. In this paper. the object transport system using the ultrasonic wave is developed. Traveling waves are generated through the use of the ultrasonic wave generator to two ends of the beam. The modelling equation on steady state response of ultrasonic vibration is expressed through normal mode expansion. Natural frequency of flexural beam is estimated. Transport direction of the object is analyzed according to phase difference and frequency. In addition, it is verified by experiment.
최항문,이원진,허민석,이삼선,김정화,최순철,박태원 대한구강악안면방사선학회 2006 Imaging Science in Dentistry Vol.37 No.1
Purpose : To find the cause of root curvature by use of panoramic and lateral cephalometric radiograph. Materials and Methods : Twenty six 1st graders whose mandibular 1st molars just emerged into the mouth were selected. Panoramic and lateral cephalometric radiograph were taken at grade 1 and 6, longitudinally. In cephalometric radio graph, mandibular plane angle, ramus-occlusal plane angle, gonial angle, and gonion-gnathion distance (Go-Gn distance) were measured. In panoramic radio graph, elongated root length and root angle were measured by means of digital subtraction radiography. Occlusal plane-tooth axis angle was measured, too. Pearson correlations were used to evaluate the relationships between root curvature and elongated length and longitudinal variations of all variables. Multiple regression equation using related variables was computed. Results : The Pearson correlation coefficient between curved angle and longitudinal variations of occlusal plane-tooth axis angle and ramus-occlusal plane angle was 0.350 and 0.401, respectively (p<0.05). There was no significant correlation between elongated root length and longitudinal variations of all variables. The resulting regression equation was Y=10.209+0.208X_(1)+0.745X_(2) (Y: root angle, X_(1): variation of occlusal plane-tooth axis angle, X_(2): variation of ramus-occlusal plane angle). Conclusion: It was suspected that the reasons of root curvature were change of tooth axis caused by contact with 2nd deciduous tooth and amount of mesial and superior movement related to change of occlusal plane. (Korean J Oral Maxillofac Radiol 2006; 36 : 55-62)
김정규;김형준;전용화;최병문;서재현;김태공 인제대학교 2012 仁濟論叢 Vol.27 No.1
In organization and company managing a lot of computers, it is difficult to manage the computer system, because it is not easy to recognize exceptions of distributed workplace such as departments and laboratories. Existing computer management systems control many computers through manager using server computer for management in field. Therefore they have the characteristic of strong locality. In this paper, we develop computer remote control system which supports convenient features and non-locality to managers by broadening effective ranges of computer management. We use Web-Site and Android Platform to develop the environment of client management regardless of multiple clients and locality. Moreover, we use WMI (Windows Management Instrumentation) to recognize and control the status of client PC without a impact on computer users.
급성 심근경색 : Gd-DTPA 조영증강 자기공명영상 Gd-DTPA Enhanced Magnetic Resonance Imaging
정경일,김제현,이창호,이영주,김한수,소동문,이영돈,박경주,왕희정,탁승제,이철주,김선용,김옥화,임태환,문창현,최병일,서정호 아주대학교 의과학연구소 1996 아주의학 Vol.1 No.1
This study was undertaken to determine the value of gadolinium dimeglumine (Gd-DTPA) enhanced MRI in the diagnosis of acute myocardial infarction. Seven cats were subjected to 2 hours of left anterior descending coronary arteryocclusion (group 1) and 8 cats to 1 hour of occlusion (group 2). Reperfusion was followed by taking Tl-weighted MR images at 5, 15, 30, 45, 60 minutes after Gd-DTPA (0.2 mmol/kg) injection. Myocardial enhancement patterns were categorized into three zones (central ischemic, peripheral ischemic, and normal) or two zones (ischemic and normal) and the presence of injured myocardium in each zone was confirmed by 2,3,5-triphenyltetrazolium chloride (TTC) staining. Signal intensity (SI) of each zone was evaluated relative to back muscle in regard to its chronological changes and difference among the zones. Group 1 displayed three zones of enhancement in 6 cats whereas 1 cat in group 1 and all in group 2 showed two zones of enhancement. Intermediate SI central zone was compatible but smaller than TTC nonstained area, and determined to be a persistently occlusive injury. High SI peripheral zone in group 1 and high SI ischemic zone in group 2 were stained and determined as reperfused injury although reversibility was not definite. The peak SI, occurring 15 minutes after Gd-DTPA injection, of 2.47±0.48 at peripheral zone was greater than that of 1.66±0.36 at central zone in group 1 and of 1.81±0.41 at ischemic zone in group 2 (p < 0.05). SI of injured myocardium increased more rapidly and decreased more gradually than that of normal myocardium. That the features of SI change with time in injured myocardium was compatible with the results of other studies using different contrast agents. Gd-DTPA enhanced MRI differentiated persistently occlusive injury as central intermediate SI, and reperfused injury as homogenous high SI, with the maximal contrast between the two at 15 minutes after contrast injection, thus indicating the value of Gd-DTPA enhanced MRI in the diagnosis of acute myocardial infarction.
[PE-0016] Characterization of salt tolerance cultivar(MYIR-S986) in silage rice
Kyung Hwa Kim(Kyung Hwa Kim),Soo Kwon Park(Soo Kwon Park),Mi-Suk Seo(Mi-Suk Seo),Yu Na Kim(Yu Na Kim),Jung Kyung Moon(Jung Kyung Moon),Sang Beom Lee(Sang Beom Lee),Gyu Tae Park(Gyu Tae Park),Dool-Yi K 한국육종학회 2022 한국육종학회 공동학술발표집 Vol.2022 No.-
( Tae-rim Kim ),( Dae-lyong Ha ),( Jin-hwa Son ),( Jungsoo Lee ),( Kihyuck Shin ),( Hoon-soo Kim ),( Hyun-chang Ko ),( Byung-soo Kim ),( Moon-bum Kim ) 대한피부과학회 2020 대한피부과학회 학술발표대회집 Vol.72 No.1
Background: Onychopapilloma is a benign tumor of nail bed and distal matrix, commonly presenting as longitudinal erythronychia, leukonychia, or melanonychia. Because onychopapilloma is rare, its clinical characteristics and dermoscopic findings have not been systematically investigated in Korea. Objectives: This study aimed to investigate the clinical characteristics and dermoscopic findings of onychopapilloma in Korea. Methods: We retrospectively reviewed medical records, clinical and dermoscopic photos of 31 patients diagnosed with onychopapilloma in the Pusan National University Hospitals (Busan and Yangsan) for 11 years (2010-2020). Results: Among 31 patients, 18 (58.1%) were males and 13 (41.9%) were females. The mean age was 44.8 (16-77) years. All of lesions were single, and most of the lesions were located on hands (96.8%), especially thumb (71.0%). The most common clinical presentation was erythronychia (58.1%), followed by leukonychia (19.4%), melanonychia (12.9%), and splinter hemorrhage without any longitudinal band (9.7%). Distal subungual hyperkeratosis (100%) was the most common dermoscopic finding, followed by V-shaped onycholysis (61.3%), splinter hemorrhage (61.3%), notch in lunula (54.8%), punctiform hemorrhage (6.5%), and distal fissuring (6.5%). Conclusion: This study reveals erythronychia is the most common clinical findings. Distal subungual hyperkeratosis, where longitudinal band reaches, is the most common dermoscopic finding and can give a clue for the diagnosis.
( Tae-rim Kim ),( Kyung-nam Bae ),( Jin-hwa Son ),( Kihyuk Shin ),( Hoon-soo Kim ),( Hyun-chang Ko ),( Moon-bum Kim ),( Byung-soo Kim ) 대한피부과학회 2021 대한피부과학회 학술발표대회집 Vol.73 No.-
Background: The biologic agent have ushered to a new era in the treatment of psoriasis. However, large-scale studies of evaluating predictive clinical values of Psoriasis Area and Severity Index (PASI) 100 response in Korean psoriasis patients have not been investigated yet. Objectives: To characterize the clinical values in patient achieving PASI100 response after treating 48-52 weeks of biologic agent. Methods:: We retrospectively reviewed medical records and clinical photos of 149 psoriasis patients who were treated with biologic agent for over 1 year. We defined a super responder as a patient who achieved PASI 100 after treatment with the biologic agent at 48-52 weeks. In this study, each clinical value was compared between super responders and non-super responders. Results: Among 149 patients, 54 (36.2 %) were super responders. There was no statistical difference in demographics and face, scalp or nail involvement of psoriasis between super responders and non-super responders. The mean body mass index (BMI) and baseline PASI was lower in super responders (28.9 kg/m2, 14.2) than non-super responders (33.9 kg/m2, 16.0). There were more biologic naïve patients in super responders (13.0 %) than non-super responders (30.9 %). Conclusion: In moderate to severe Korean psoriasis patient, PASI100 response could be expected more frequently for patient who had lower baseline BMI and PASI and were biologic naïve.