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Leiomyosarcoma of Urinary Bladder in a Yorkshire Terrier Dog
목진수,박정현,안소연,김아름,한창희,황태성,이희천 한국임상수의학회 2020 한국임상수의학회지 Vol.37 No.2
A 13-year-old, intact male, Yorkshire terrier dog with oliguria and hematuria was presented to the Small Animal Clinic at the Gyeongsang National University animal medical center. There were no remarkable findings on serum chemistry values and complete blood counts. Abdominal radiographs revealed mild elevation of the descending colon at the pelvic level. On the excretory urographic images, a large filling defect was identified in urinary bladder with narrow urinary bladder wall contact and there were no remarkable findings in kidneys and ureters. The abdominal ultrasonography revealed that an irregularly marginated, heterogeneous mass in urinary bladder, central cavitary lesion and mild vascular flow were also observed. Computed tomography showed a heterogeneously attenuated mass within urinary bladder. The mass was surgically excised, and leiomyosarcoma was confirmed by histopathological examination. The patient was followed up for two months and there were no complications. This case is of interest because of the unusual findings of leiomyosarcoma of urinary bladder in a small breed dog.
Imaging Diagnosis of Dilated Cardiomyopathy in a Maltese Dog
안소연,박정현,목진수,김아름,한창희,송중현,유도현,황태성,이희천 한국임상수의학회 2021 한국임상수의학회지 Vol.38 No.3
A 6-year-old, spayed female, Maltese dog with tachypnea and dry cough was presented to Gyeongsang National University Veterinary Medical Teaching hospital. On physical examination, its respiration rate was 132 per minute. Decreased partial pressure of oxygen, partial pressure of carbon dioxide, and hyperlactatemia were found on arterial blood gas analysis. Its diastolic blood pressure was 80 mmHg. Auscultation revealed arrhythmia. Electrocardiogram revealed P pulmonale, P mitrale, and ventricular premature complexes. Thoracic radiographs revealed mild enlargement of both atrium and moderate enlargement of the left ventricular. There was also a moderate alveolar pattern in the right and caudal part of the left cranial lung lobe. Two-dimensional echocardiography showed enlargement of generalized four chambers without remarkable findings of valvular degeneration. M-mode echocardiography showed decreased left ventricular fractional shortening and enlarged left ventricular internal diameter at both end-systolic and end-diastolic. Color-flow Doppler imaging revealed eccentric turbulent flow starting below the left ventricular outflow tract and extending into the left atrium during systole. Spectral Doppler recordings revealed a high velocity flow through the mitral, tricuspid, aorta, and pulmonic regurgitation. Restrictive transmitral flow revealed high E-wave velocity, short E-wave deceleration time, and reduced A-wave velocity. There was also low ejection velocity thorough left ventricular out tract flow. Based on echocardiographic examination, dilated cardiomyopathy was the tentative diagnosis. The dog was medicated with inotropes, angiotensin converting enzyme inhibitor, and diuretics. At the 10-day following-up, the dog died suddenly. This report describes echocardiographic diagnosis and prognosis of dilated cardiomyopathy rarely reported in small breed dogs.
가변 유압모터를 이용한 전동지게차 리프트회생 효율에 관한 연구
박용수,어영소,윤진수,도 찌 끄엉,한성민,신정우,유충목,안경관 사단법인 유공압건설기계학회 2020 드라이브·컨트롤 Vol.17 No.3
In modern society, the energy-saving problem of industrial vehicles is economically and environmentally critical. Energy savings using the potential energy of forklifts are one of the viable solutions to resolving this problem. The basic concept of this study is to operate the hydraulic motor and recharge the battery using the flow rate from the cylinder when loading heavy objects and lowering the fork. To save energy, the torque and rotational speed of the generator should be optimized according to the load and descent speed to increase efficiency. To this end, we propose a system that optimizes energy saving efficiency by controlling the swashplate angle of the variable hydraulic motor through the GA(Genetic-Algorithm). The results were verified by building and comparing fixed motor models and variable motor models using the AMEsim. The results of the study show that the proposed optimized swashplate angle increases the energy saving efficiency by approximately 6%-8%, depending on the working conditions.
가변 유압모터를 이용한 전동지게차의 에너지회생 알고리즘 개발
박용수(Y. S. Park),어영소(Y. X. Yu),정은진(E. J. Jeong),윤진수(J. S. Youn),도찌끄엉(D. T. Cuong),한성민(S. M. Han),신정우(J. W. Shin),유충목(C. M. Yu),안경관(K. K. Ahn) 유공압건설기계학회 2019 유공압건설기계학회 학술대회논문집 Vol.2019 No.11
In modern society, energy saving issues of industrial vehicles are very important for both economically and environmentally. Energy savings using the potential energy of forklifts must be one of the very good solutions. The basic concept is to run the generator using the flow rate discharged from the cylinder when the fork down while carrying a heavy object, and recharge the battery. This study aims to control the flow rate through the use of variable motor to achieve higher energy savings. Using AMEsim, compare the model with the fixed motor and the model with the variable motor and analyze it through the efficiency map to suggest a strategy with better energy efficiency.