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155 results on '"Horváth, Robert"'

2. The Ecological Footprint of Embedded Rail Structures

Author

Major, Zoltán, Horváth, Róbert, Szennay, Áron, Witko, Tomasz, Szigeti, Cecília, Kacprzyk, Janusz, Series Editor, Gomide, Fernando, Advisory Editor, Kaynak, Okyay, Advisory Editor, Liu, Derong, Advisory Editor, Pedrycz, Witold, Advisory Editor, Polycarpou, Marios M., Advisory Editor, Rudas, Imre J., Advisory Editor, Wang, Jun, Advisory Editor, Macioszek, Elżbieta, editor, Jurdana, Irena, editor, and Sierpiński, Grzegorz, editor

Published
2024
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5. Profiling of Copy Number Alterations Using Low-Coverage Whole-Genome Sequencing Informs Differential Diagnosis and Prognosis in Primary Cutaneous Follicle Center Lymphoma

Author

Bátai, Bence, Kiss, Laura, Varga, Luca, Nagy, Ákos, Househam, Jacob, Baker, Ann-Marie, László, Tamás, Udvari, Anna, Horváth, Róbert, Nagy, Tibor, Csomor, Judit, Szakonyi, József, Schneider, Tamás, Graham, Trevor A., Alpár, Donát, Fitzgibbon, Jude, Szepesi, Ágota, and Bödör, Csaba

Published
2024
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7. On nonlinear Schr\'{o}dinger equations on the hyperbolic space

Author

Cencelj, Matija, Faragó, István, Horváth, Róbert, and Repovš, Dušan D.

Subjects
Mathematics - Analysis of PDEs, Primary: 35J60, 49K10, 58J32, Secondary: 35A01, 35R01
Abstract

We study existence of weak solutions for certain classes of nonlinear Schr\"{o}dinger equations on the Poincar\'{e} ball model $\mathbb{B}^N$, $N\geq 3$. By using the Palais principle of symmetric criticality and suitable group theoretical arguments, we establish the existence of a nontrivial (weak) solution.

Published
2020
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8. Slow propagation of 2 GHz acoustical waves in a suspended GaAs on insulator phononic waveguide

Author

Modica, Giuseppe, Zhu, Rui, Horvath, Robert, Beaudoin, Gregoire, Sagnes, Isabelle, and Braive, Rémy

Subjects
Physics - Applied Physics
Abstract

Optoelectronic oscillators have dominated the scene of microwave oscillators in the last few years thanks to their great performances regarding frequency stability and phase noise. However, miniaturization of such a device is an up to date challenge. Recently, devices based on phonon-photon interaction gather a lot of interest thanks to their extreme compactness and working frequency directly in the GHz. In this frame, a still missing element to obtain long-term frequency stability performances is an on-chip delay within the feedback loop. Here, we experimentally show filtering and slow propagation of 2 GHz acoustic waves on a Gallium Arsenide membrane heterogeneously integrated on silicon wafer. By engineering the dispersion of an acoustical waveguide, we evidence a group velocity below 1000 m/s for the mode able to propagate. Thus, an integrated delay implementation is at reach for potential improvement of opto-acoustic devices such as optomechanical oscillators or wireless applications.

Published
2020
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9. Characterization of the dissolution of water microdroplets in oil

Author

Gerecsei, Tamás, Ungai-Salanki, Rita, Saftics, Andras, Derényi, Imre, Horvath, Robert, and Szabo, Balint

Subjects
Condensed Matter - Soft Condensed Matter, Physics - Chemical Physics
Abstract

Water in oil emulsions have a wide range of applications from chemical technology to microfluidics, where the stability of water droplets is of paramount importance. Here using an accessible and easily reproducible experimental setup we describe and characterize the dissolution of water in oil, which renders nanoliter-sized droplets unstable, resulting in their shrinkage and disappearance in a time scale of hours. This process has applicability in creating miniature reactors for crystallization. We test multiple oils and their combinations with surfactants exhibiting widely different rates of dissolution. We derived simple analytical equations to determine the product of the diffusion coefficient and the relative saturation density of water in oil from the measured dissolution data. By measuring the moisture content of mineral and silicone oils with Karl Fischer titration before and after saturating them with water, we calculated the diffusion coefficient of water in these two oils, Comment: 8 pages 6 figures 3 supplementary videos

Published
2020

11. A practical review on the measurement tools for cellular adhesion force

Author

Ungai-Salanki, Rita, Peter, Beatrix, Gerecsei, Tamas, Orgovan, Norbert, Horvath, Robert, and Szabo, Balint

Subjects
Physics - Biological Physics
Abstract

Cell cell and cell matrix adhesions are fundamental in all multicellular organisms. They play a key role in cellular growth, differentiation, pattern formation and migration. Cell-cell adhesion is substantial in the immune response, pathogen host interactions, and tumor development. The success of tissue engineering and stem cell implantations strongly depends on the fine control of live cell adhesion on the surface of natural or biomimetic scaffolds. Therefore, the quantitative and precise measurement of the adhesion strength of living cells is critical, not only in basic research but in modern technologies, too. Several techniques have been developed or are under development to quantify cell adhesion. All of them have their pros and cons, which has to be carefully considered before the experiments and interpretation of the recorded data. Current review provides a guide to choose the appropriate technique to answer a specific biological question or to complete a biomedical test by measuring cell adhesion.

Published
2019

18. Dextran-based Hydrogel Layers for Biosensors

Author

Saftics, Andras, Türk, Barbara, Sulyok, Attila, Nagy, Norbert, Agócs, Emil, Kalas, Benjámin, Petrik, Péter, Fried, Miklós, Khánh, Nguyen Quoc, Prósz, Aurél, Kamarás, Katalin, Szekacs, Inna, Horvath, Robert, Kurunczi, Sándor, Chandra, Pranjal, editor, and Prakash, Rajiv, editor

Published
2020
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25. PDE approximation of large systems of differential equations

Author

Bátkai, András, Havasi, Ágnes, Horváth, Róbert, Kunszenti-Kovács, Dávid, and Simon, Péter L.

Subjects
Mathematics - Functional Analysis, Mathematics - Dynamical Systems, 47D06, 47N40, 65J10
Abstract

A large system of ordinary differential equations is approximated by a parabolic partial differential equation with dynamic boundary condition and a different one with Robin boundary condition. Using the theory of differential operators with Wentzell boundary conditions and similar theories, we give estimates on the order of approximation. The theory is demonstrated on a voter model where the Fourier method applied to the PDE is of great advantage., Comment: reviewer requests incorporated, to appear in "Operators and Matrices"

Published
2013

34. On a Spatial Epidemic Propagation Model

Author

Faragó, István, Horváth, Róbert, Bock, Hans Georg, Series editor, de Hoog, Frank, Series editor, Friedman, Avner, Series editor, Gupta, Arvind, Series editor, Nachbin, André, Series editor, Ozawa, Tohru, Series editor, Pulleyblank, William R., Series editor, Rusten, Torgeir, Series editor, Santosa, Fadil, Series editor, Seo, Jin Keun, Series editor, Tornberg, Anna-Karin, Series editor, Russo, Giovanni, editor, Capasso, Vincenzo, editor, Nicosia, Giuseppe, editor, and Romano, Vittorio, editor

Published
2016
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49. On the Sign-Stability of Finite Difference Solutions of Semilinear Parabolic Problems

Author

Horváth, Róbert, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Margenov, Svetozar, editor, Vulkov, Lubin G., editor, and Waśniewski, Jerzy, editor

Published
2009
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