Search Results - "Vaněk, Petr"

Spinal fusion for single-level SPECT/CT positive lumbar degenerative disc disease: the SPINUS I study by Kaiser, Radek, Varga, Michal, Lang, Otto, Waldauf, Petr, Vaněk, Petr, Saur, Karel, Beneš, Vladimír, Netuka, David

“…Introduction and purpose With current imaging modalities and diagnostic tests, identifying pain generators in patients with non-specific chronic low back pain…”
Get full text

A Practical Multirobot Localization System by Krajník, Tomáš, Nitsche, Matías, Faigl, Jan, Vaněk, Petr, Saska, Martin, Přeučil, Libor, Duckett, Tom, Mejail, Marta

“…We present a fast and precise vision-based software intended for multiple robot localization. The core component of the software is a novel and efficient…”
Get full text

Sign-changing diagonal perturbations of Laplacian matrices of graphs by Stehlík, Petr, Vaněk, Petr

“…In this paper we provide sufficient conditions for positive (semi)definiteness of sign-changing diagonal perturbations of positive semidefinite difference…”
Get full text

Improved convergence estimate for a multiply polynomially smoothed two-level method with an aggressive coarsening by Tezaur, Radek, Vaněk, Petr

“…A variational two-level method in the class of methods with an aggressive coarsening and a massive polynomial smoothing is proposed. The method is a…”
Get full text

An improved convergence analysis of smoothed aggregation algebraic multigrid by Brezina, Marian, Vaněk, Petr, Vassilevski, Panayot S.

“…SUMMARY We present an improved analysis of the smoothed aggregation algebraic multigrid method extending the original proof in [Numer. Math. 2001; 88:559–579]…”
Get full text

Exact interpolation scheme with approximation vector used as a column of the prolongator by Kuzel, Roman, Vank, Petr

“…Summary Our method is a kind of exact interpolation scheme by Achi Brandt et al. In the exact interpolation scheme, for x being the fine‐level approximation of…”
Get full text

Improved convergence bounds for smoothed aggregation method: Linear dependence of the convergence rate on the number of levels by Brousek, Jan, Fraňková, Pavla, Vaněk, Petr

“…The smoothed aggregation method has became a widely used tool for solving the linear systems arising by the discretization of elliptic partial differential…”
Get full text

Nearly optimal convergence result for multigrid with aggressive coarsening and polynomial smoothing by Vaněk, Petr, Brezina, Marian

“…We analyze a general multigrid method with aggressive coarsening and polynomial smoothing. We use a special polynomial smoother that originates in the context…”
Get full text

Smoothed prolongation multigrid with rapid coarsening and massive smoothing by Vank, Petr

“…We prove that within the frame of smoothed prolongations, rapid coarsening between first two levels can be compensated by massive prolongation smoothing and…”
Get full text

S2643 Percutaneous Endoscopic Cecostomy as Definitive Treatment in an Elderly Patient With Recurrent Ogilvie’s Syndrome by Vanek, Petr, Urban, Ondrej, Falt, Premysl

Get full text

Model analysis of BPX preconditioner based on smoothed aggregation by Fraňková, Pavla, Mandel, Jan, Vaněk, Petr

“…We prove nearly uniform convergence bounds for the BPX preconditioner based on smoothed aggregation under the assumption that the mesh is regular. The analysis…”
Get full text

S2556 An Unusual Presentation of Necrotizing Pancreatitis by Herman, Tessa, Karna, Rahul, Vanek, Petr, Azeem, Nabeel, Trikudanathan, Guru

Get full text

Diagnosing Disconnected Pancreatic Duct Syndrome: Many Disconnects, Few Answers by Vanek, Petr, Trikudanathan, Guru, Freeman, Martin L.

Get full text

Single-Session Endoscopic Ultrasound-Directed Transgastric ERCP (“EDGE”) in a Bariatric Patient with Pancreatic Mass and Biliary Obstruction by Vanek, Petr, Mallery, Shawn, Freeman, Martin L., Trikudanathan, Guru

“…This video case report presents a patient with an invasive pancreatic mass and a history of Roux-en-Y gastric bypass surgery who underwent single-session…”
Get full text

Analysis of an algebraic Petrov–Galerkin smoothed aggregation multigrid method by Guillard, Hervé, Janka, Aleš, Vaněk, Petr

“…We give a convergence estimate for a Petrov–Galerkin Algebraic Multigrid method. In this method, the prolongations are defined using the concept of smoothed…”
Get full text

Comparison of stem volume of Eastern white pine (Pinus strobus L.) and Scotch pine (Pinus sylvestris L.) by Vaněk, Petr, Bednář, Pavel

“…This study deals with mensurational and volumetric characteristics of introduced Eastern white pine (Pinus strobus) in comparison with native Scotch pine…”
Get full text

Regeneration of Silver fir (Abies Alba Mill.) on Clear-cut Areas by Vaněk, Petr, Mauer, Oldřich

“…The paper evaluates the growth of Silver fir plantations on clear-cut areas in the regime of different sheltering and mixing with the European larch. The…”
Get full text

S112 Isolated Organ Failure Increases Morbidity But Not Mortality in Patients With Necrotizing Pancreatitis—A Single Tertiary Center Experience in 581 Patients by Vanek, Petr, Zapletalova, Jana, Jonason, David E., Freeman, Martin L., Trikudanathan, Guru

Get full text

Current Screening Strategies for Pancreatic Cancer by Vanek, Petr, Urban, Ondrej, Zoundjiekpon, Vincent, Falt, Premysl

“…Pancreatic ductal adenocarcinoma (PDAC) is a dreaded malignancy with a dismal 5-year survival rate despite maximal efforts on optimizing treatment strategies…”
Get full text

Disconnected pancreatic duct syndrome in patients with necrotizing pancreatitis by Vanek, Petr, Urban, Ondrej, Trikudanathan, Guru, Freeman, Martin L.

“…In a subset of patients with acute necrotizing pancreatitis, segmental necrosis affecting the main pancreatic duct may result in a discontinuity between the…”
Get full text