http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
박지용,유영태,나기대,정정무 朝鮮大學校 機械技術硏究所 1999 機械技術硏究 Vol.2 No.2
In this paper, the pressure response characteristics to linear change of a flow rate in pipeline is treated theoretical expression representing the shape of the pressure and velocity distribution response to it have been derived and the influence of the parameters in the pipeline-systems on the pressure response have been elucidated. The amplitude of the oscillatory pressures, in the course to be transmitted to the pressure transducer through a long pipe, will be diminished of the same time be accompanied with a phase log owing to the inertia of the fluid(oil, water, air) existing in the pipe and frictional resistance of the pipe wall. This paper will be help to understood pressure wave propajation and design of hydraulic experiments and error behaviors.
정정무,유영태,김형준 朝鮮大學校 機械技術硏究所 1999 機械技術硏究 Vol.2 No.1
In order to evaluate the transient behavior of a pipe, a differential equation relating flow through and the pressure drop across a pipe was derived. The solution of this equation for transient flow through a pipe subjected to a step change in pressure drop across the pipe is significantly different than that obtained using the very low frequency flow. Functional operators are derived for the propagation factor and characteristic impedance for small amplitude wave in rigid uniform fluid transmission line when the effects of verging velocity profile is included. The dynamic description of pipe flow may be combined with a larger system analysis to more assurately predict the overall transient performance of flow system. The results are used particularly to determine the impulse and step response of a line, which clearly demonstrate the observed dispersion of fast transients.
Amikacin sulfate(Amiktam^(�))의 비뇨기과 영역에서의 임상효과
문무성,정정만,최승강,이진무,왕종순 최신의학사 1978 最新醫學 Vol.21 No.12
Amikacin, a new semisynthetic aminoglycoside antibiotic was administered to 37 patients wih urinary tract infections intramuscularly at a dose of 400mg. once a day for 5 or 7 days. The 37 cases of urinary infections had no Amikacin treatment interfering factors such as urinary obstruction, diabetes mellitus and chronic debilitating diseases. The global clinical results were seen to be excellent in 33 cases, its effectiveness rate being 89.2%. The failure to treatment occurred in Staphylococcal urethritis (25%) and Gonococcal urethritis (12.5%). Staphylococcal infection showed also disparity between the clinical effect and in vitro sensitivity. We'd better give Amikacin in more dose and for longer duration in the complicated urinary infections or previously treated cases. Anyway, Amikacin proved to be one of the most useful antibiotics for simple urinary infections without any significant side-effects.
문무성,정정만,이진무 中央醫學社 1976 中央醫學 Vol.31 No.5
Calculous anuria is one of the complications of upper urinary tract calculi and may be caused by mechanical obstruction at some point of the tract, renal insufficiency, and a combination of obstructive and renal factors. The clinical features may vary from a complete absence of symptom to the time when the patient observes he could not pass urine. An immediate roentgenogram and catheterization of the ureters in an attempt to restore the excretion of urine are always recommended and in from 50 to 55 per cent of the patients the calculus is expelled. Even if anuria recurs after withdrawal of the catheter, the patient is in better condition for surgical intervention as a result of the removal of accumulated nitrogenous waste products. Uric acid calculi comprise from 3.5 to 4 percent of urinary calculi. A low purine diet, allopurinol and alkalinization of urine are proved very effective in management of it. Recently we have experienced a case of calculous anuria due to bilateral ureteral stones in 41 years old man and present it with the review of the literatures.