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Your search keyword '"Závodszky, P."' showing total 34 results
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34 results on '"Závodszky, P."'

4. Multiple Aneurysms AnaTomy CHallenge 2018 (MATCH)—phase II: rupture risk assessment

Author

Berg, Philipp, Voß, Samuel, Janiga, Gábor, Saalfeld, Sylvia, Bergersen, Aslak W., Valen-Sendstad, Kristian, Bruening, Jan, Goubergrits, Leonid, Spuler, Andreas, Chiu, Tin Lok, Tsang, Anderson Chun On, Copelli, Gabriele, Csippa, Benjamin, Paál, György, Závodszky, Gábor, Detmer, Felicitas J., Chung, Bong J., Cebral, Juan R., Fujimura, Soichiro, Takao, Hiroyuki, Karmonik, Christof, Elias, Saba, Cancelliere, Nicole M., Najafi, Mehdi, Steinman, David A., Pereira, Vitor M., Piskin, Senol, Finol, Ender A., Pravdivtseva, Mariya, Velvaluri, Prasanth, Rajabzadeh-Oghaz, Hamidreza, Paliwal, Nikhil, Meng, Hui, Seshadhri, Santhosh, Venguru, Sreenivas, Shojima, Masaaki, Sindeev, Sergey, Frolov, Sergey, Qian, Yi, Wu, Yu-An, Carlson, Kent D., Kallmes, David F., Dragomir-Daescu, Dan, and Beuing, Oliver

Published
2019
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17. Load balancing of parallel cell-based blood flow simulations.

Author

Alowayyed, S., Závodszky, G., Azizi, V., and Hoekstra, A.G.

Subjects
FLOW simulations, BLOOD flow, GRANULAR flow, DISTRIBUTION costs
Abstract

The non-homogeneous distribution of computational costs is often challenging to handle in highly parallel applications. Using a methodology based on fractional overheads, we studied the fractional load imbalance overhead in a high-performance biofluid simulation aiming to accurately resolve blood flow on a cellular level. In general, the concentration of particles in such a suspension flow is not homogeneous. Usually, there is a depletion of cells close to walls, and a higher concentration towards the centre of the flow domain. We perform parallel simulations of such suspension flows. The emerging non-homogeneous cell distributions might lead to strong load imbalance, resulting in deterioration of the parallel performance. We formulate a model for the fractional load imbalance overhead, validate it by measuring this overhead in parallel lattice Boltzmann based cell-based blood flow simulations, and compare the arising load imbalance with other sources of overhead, in particular the communication overhead. We find a good agreement between the measurements and our load imbalance model. We also find that in our test cases, the communication overhead was higher than the load imbalance overhead. However, for larger systems, we expect load imbalance overhead to be dominant. Thus, efficient load balancing strategies should be developed. [ABSTRACT FROM AUTHOR]

Published
2018
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22. Design, construction, and first commissioning results of superconducting source for ions at NSCL/MSU.

Author

Závodszky, P. A., Arend, B., Cole, D., DeKamp, J., Doleans, M., Machicoane, G., Marti, F., Miller, P., Moskalik, J., Nurnberger, W., Ottarson, J., Vincent, J., Wu, X., and Zeller, A.

Subjects
*ION sources, *CYCLOTRON resonance, *MICROWAVES, *SUPERCONDUCTING magnets, *SOLENOIDS
Abstract

A new electron cyclotron resonance ion source (ECRIS) was constructed at the NSCL/MSU to replace the existing SC-ECRIS. This ECRIS operates at 18+14.5 GHz microwave frequencies with a planned upgrade to 24–28 GHz in the second phase of commissioning. A superconducting hexapole coil system produce the radial magnetic field; the axial trapping is produced with six superconducting solenoid coils enclosed in an iron yoke to allow the optimization of the distance between the plasma electrode and the resonant zone in the plasma. We report the details of the design, construction, and initial commissioning results of this new ECRIS. [ABSTRACT FROM AUTHOR]

Published
2008
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23. Experimental evidences for emittance degradation by space charge effect when using a focusing solenoid below an electron cyclotron resonance ion source.

Author

Machicoane, G., Doleans, M., Stetson, J., Wu, X., and Závodszky, P. A.

Subjects
ION sources, NUCLEAR physics instruments, IONS, SCIENTIFIC apparatus & instruments, RESEARCH equipment
Abstract

Solenoids are widely used to provide initial focusing of beams extracted from an ion source. However, in the case of an electron cyclotron resonance (ECR) ion source, the extracted beam will usually include different ion species and for each of them a wide distribution of charge states. When such a multicomponent beam is focused by a solenoid, the ions with a Q/A larger than the beam of interest are overfocused and usually go through a waist before reaching the analyzing magnet. If the beam currents obtained for these ions are sufficient, the resulting space charge forces can significantly degrade the emittance of the beam components with a lower Q/A and result for those in a hollow beam. Using a beam viewer and an emittance-measuring device, this paper reports on experimental findings that confirm the existence of such an effect for low charge states of argon. Moreover, by changing the experimental conditions of the ECR plasma in order to modify the charge state distribution of the extracted ion beam, it is shown that the threshold where this space charge effect starts to be significant can be changed. [ABSTRACT FROM AUTHOR]

Published
2008
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26. Dissecting insect development: baculovirus-mediated gene silencing in insects.

Author

Hajós, J. P., Vermunt, A. M. W., Zuidema, D., Kulcsár, P., Varjas, L., de Kort, C. A. D., Závodszky, P., and Vlak, J. M.

Subjects
INSECT development, GENE silencing, BACULOVIRUSES, INSECTICIDES
Abstract

AbstractA novel concept applying baculovirus-mediated gene silencing to study insect gene function and regulation is described in this paper. A recombinant baculovirus, Autographa californica multicapsid nucleopolyhedrovirus (AcMNPV), was constructed with the juvenile hormone esterase (JHE) gene from the tobacco budworm Heliothis virescens in the antisense orientation, driven by the viral p10 promoter. Infection with this recombinant greatly reduced the haemolymph JHE level and resulted in aberrant morphogenesis of final-instar H. virescens larvae. The body organization remained larval, although the cuticle became hard and brown, similar to pupal cuticle. These results demonstrated that baculovirus-mediated gene silencing can be accomplished and utilized to dissect insect development and to design a new class of baculovirus insecticides. [ABSTRACT FROM AUTHOR]

Published
1999
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