To achieve automatic needle puncturing for automatic blood sampling, we studied peak waveforms of the puncture forces developed during penetration of a blood vessel. Computer simulations of controlled needle puncture were performed using data from experiments on puncturing a rabbit's ear vein. Reproducible results of successive puncturing suggested that this simulation could be applied to the c...

In this paper we address a supply vessel planning problem arising in servicing oil and gas offshore installations. Supply vessels provide offshore installations with necessary supplies on periodic basis from offshore supply bases according to weekly sailing schedules. The execution of weekly schedules during the year is affected by weather conditions influencing on sailing time and service dura...

We have developed a thermal model, for use in hyperthermia treatment planning, in which blood vessels are described as geometrical objects; 3D curves with associated diameters. For the calculation of the heat exchange with the tissue an analytic result is used. To arrive at this result some assumptions were made. One of these assumptions is a cylindrically symmetric temperature distribution. In...

In this paper, a multi-agent based simulation platform is introduced that focuses on legitimate and illegitimate aspects of maritime traffic, mainly on intercontinental transport through piracy afflicted areas. The extensible architecture presented here comprises several modules controlling the simulation and the life-cycle of the agents, analyzing the simulation output and visualizing the enti...

The spatial and temporal distributions of wall shear stress (WSS) in prototype vessel geometries of coronary segments are investigated via numerical simulation, and the potential association with vascular disease and specifically atherosclerosis and plaque rupture is discussed. In particular, simulation results of WSS spatio-temporal distributions are presented for pulsatile, non-Newtonian bloo...

Aerodynamic loads and moments on a naval patrol vessel are investigated using computational fluid dynamic simulations based the OpenFOAM solver. After initial turbulence, time, grid dependency study, model scale were performed for wide range of inflow angles to predict aerodynamic forces acting at different heading conditions. For validation, results compared with wind tunnel data similar hull ...

1 Corresponding Author, Phone: 404-894-8412, FAX: 404-894-9342, e-mail: [email protected] ABSTRACT Since no simulation model is perfect, any simulation model for modeling a system’s physical behavior can be refined further. Hence, the question faced by a designer is – “How much refinement of a simulation model is adequate for a particular design problem?” To answer this question, we...

Doppler ultrasound scanning is a special ultrasound technique that evaluates blood as it flows through a blood vessel. It is an important technique for non-invasively measuring the velocities of moving particles within the body. A Doppler ultrasound test uses reflected sound waves to evaluate blood as it flows through a blood vessel. Due to the pulsatile blood flow in arteries and the random po...

background and objective: the circle of willis (cow) supports adequate blood supply to the brain. the cardiovascular system, in the current study, is modeled using an equivalent electronic system focusing on the cow. method: in our previous study we used 42 compartments to model whole car- diovascular system. in the current study, nevertheless, we extended our model by using 63 compartments to ...

Within the last 15 years, image-guided minimally invasive endovascular treatment for ruptured or un-ruptured cerebral aneurysms has surpassed surgical treatment for a subset of aneurysms, as shown in recent large randomised trials (ISAT, ISUIA). Endovascular patient care occurs at equal or lower cost than surgery. Cerebral aneurysms are of variable pathogenesis and by far the largest group cons...