Computer modeling of plasma flow switches

SummaryAn accurate catheter-free technique for clinical determination simultaneouslyof glomerular filtration rate and effective renal plasma flow by means of radioisotopes has been developed. The renal function is estimated by the amount of radioisotopes necessary to maintain a constant concentration in the patient’s blood. The infusion pumps are steered by a feedback system, the pumps being automatically turned on when the radiation measured over the patient’s head falls below a certain preset level and turned off when this level is again readied. 131I-iodopyracet was used for the estimation of effective renal plasma flow and125I-iothalamate estimation of the glomerular filtration rate. These clearances were compared to the conventional bladder clearances and good correlation was found between these two clearance methods (correlation coefficients 0.97 and.90 respectively). The advantages and disadvantages of this new clearance technique are discussed.

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The Role of Computer Modeling in Electrocardiography

Methods of Information in Medicine ◽

10.1055/s-0038-1634809 ◽

1990 ◽

Vol 29 (04) ◽

pp. 282-288 ◽

Cited By ~ 2

Author(s):

A. van Oosterom

Keyword(s):

Electrical Activity ◽

Computer Modeling ◽

Body Surface ◽

Electrical Current ◽

The Body ◽

Volume Conductor ◽

Current Generator ◽

Cardiac Electrical Activity ◽

Source Models

AbstractThis paper introduces some levels at which the computer has been incorporated in the research into the basis of electrocardiography. The emphasis lies on the modeling of the heart as an electrical current generator and of the properties of the body as a volume conductor, both playing a major role in the shaping of the electrocardiographic waveforms recorded at the body surface. It is claimed that the Forward-Problem of electrocardiography is no longer a problem. Several source models of cardiac electrical activity are considered, one of which can be directly interpreted in terms of the underlying electrophysiology (the depolarization sequence of the ventricles). The importance of using tailored rather than textbook geometry in inverse procedures is stressed.

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Percutaneous Tibial Fracture Reduction using CT Imaging, Computer Modeling and 3D Printed Constructs

Veterinary and Comparative Orthopaedics and Traumatology ◽

10.1055/s-0038-1668177 ◽

2018 ◽

Vol 31 (S 02) ◽

pp. A1-A25

Author(s):

John Davies ◽

Albert Lynch

Keyword(s):

Computer Modeling ◽

Tibial Fracture ◽

Ct Imaging ◽

Fracture Reduction ◽

3D Printed

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Computer modeling of the 3D structure of human cytochrome P450c21 in a young woman with late-onset AGS and a new mutation within the steroid-21-hydroxylase gene

Experimental and Clinical Endocrinology & Diabetes ◽

10.1055/s-2005-862870 ◽

2005 ◽

Vol 113 (S 1) ◽

Author(s):

J Bojunga ◽

C Welsch ◽

M Albrecht ◽

I Antes ◽

T Lengauer ◽

...

Keyword(s):

Computer Modeling ◽

Young Woman ◽

Late Onset ◽

3D Structure ◽

New Mutation ◽

Hydroxylase Gene ◽

Human Cytochrome

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COMPUTER MODELING OF FINANCIAL CALCULATIONS

Informatics and Education ◽

10.32517/0234-0453-2019-34-4-33-37 ◽

2019 ◽

pp. 33-37

Author(s):

O. S. Korneva

Keyword(s):

Computer Modeling ◽

Professional Education ◽

Information Technologies ◽

Financial Education ◽

Economic Education ◽

Economic Activities ◽

School Teachers ◽

University Teachers ◽

Educational Literature ◽

Higher Professional Education

Within the implementation of the national strategy for improving financial competency and financial education in Russia, aimed at the broad masses of the population, any experience in promoting financial competency among young people, accumulated in the system of training bachelors of Economics, will be useful. The purpose of the article is to present the methodological and practical aspects of teaching the basics of financial calculations of future economists and the formation of computer modeling skills in the field of financial and economic activity. The reason for writing the article was the problem of interdisciplinary integration in the system of financial and economic education. The analysis of educational literature and curricula of the system of secondary and higher professional education, as well as the study and generalization of pedagogical experience showed weak integration of mathematical and economic disciplines with information technologies. The article also presents the problems associated with the calculations in the financial and economic activities with the use of computer modeling. The elements of the presented methods of teaching the basics of financial computing in conjunction with the modeling of financial problems on the computer can be useful for both school teachers and university teachers of mathematics and computer science.

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RENAL FUNCTION AND KIDNEY SIZE FOLLOWING HYPOPHYSECTOMY IN MAN

Acta Endocrinologica ◽

10.1530/acta.0.0480348 ◽

1965 ◽

Vol 48 (3) ◽

pp. 348-354 ◽

Cited By ~ 33

Author(s):

Thomas Falkheden ◽

Ingmar Wickbom

Keyword(s):

Renal Function ◽

Diabetic Retinopathy ◽

Glomerular Filtration Rate ◽

Plasma Flow ◽

Mammary Carcinoma ◽

Filtration Rate ◽

Renal Plasma Flow ◽

Kidney Weight ◽

Kidney Size ◽

Before And After

ABSTRACT Measurements of glomerular filtration rate (GFR) and renal plasma flow (RPF) were performed in close connection with roentgenographic estimation of kidney size, before and after hypophysectomy, in 10 patients (four cases of metastatic mammary carcinoma, five cases of diabetic retinopathy and one case of acromegaly). Hypophysectomy was regularly followed by a decrease in GFR and RPF. In most cases, a reduction in the roentgenographic kidney size was also observed. However, the changes in the roentgenographic kidney size and calculated kidney weight after hypophysectomy were smaller and occurred at a slower rate than the alterations in GFR and RPF. The results favour the view that, primarily, the decrease in GFR and RPF following hypophysectomy is essentially functional rather than due to a reduced kidney mass.

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