Results 121 to 130 of about 73,165 (262)

Resolution Enhancement by Prediction of the High-Frequency Image Based on the Laplacian Pyramid

EURASIP Journal on Advances in Signal Processing, 2006
According to recent advances in digital image processing techniques, interest in high-quality images has been increased. This paper presents a resolution enhancement (RE) algorithm based on the pyramid structure, in which Laplacian histogram matching is
Yang Seungjoon, Jeon Bo-Won, Park Rae-Hong   +2 more
doaj   +1 more source

Toward Brain Biosignature at 7 T—Repeatability of a Multiparametric CEST, QSM, QTI, and Sodium Imaging Protocol

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To evaluate the repeatability of an extended multiparametric 7 T MRI protocol for voxel‐wise tissue characterization combining morphological, CEST, QSM, QTI, and Sodium contrasts. Methods A repeatability study was performed in 12 volunteers without diagnosed neurological disease on a 7 T MRI system, using a comprehensive acquisition ...
Annika Hofmann, Martin Freudensprung, Lion Mücke, Tobias Wilferth, Zijin Yang, Dominik Perrin, Julius Glaser, Katharina Tkotz, Magda Duarte, Simon Weinmüller, Oliver Chaudry, Annemarie Wirth, Angelika Mennecke, Oliver Gödicke, Patrick Liebig, Lena V. Gast, Philipp Ehses, Clemens Stilianu, Rudolf Stollberger, Jannis Hanspach, Alexander German, Jürgen Winkler, Michael Uder, Arnd Doerfler, Sebastian Bickelhaupt, Andreas Maier, Katharina Breininger, Moritz Zaiss, Armin M. Nagel, Frederik B. Laun, Florian Knoll   +30 more
wiley   +1 more source

The Neumann eigenvalue problem for the ∞-Laplacian

, 2015
. — The first nontrivial eigenfunction of the Neumann eigenvalue problem for the p-Laplacian, suitably normalized, converges to a viscosity solution of an eigenvalue problem for the l-Laplacian as p ! l.
ESPOSITO, Luca, Kawohl, B., C. Trombetti, TROMBETTI, CRISTINA, Esposito, L., Nitsch, C., B. Kawohl, C. Nitsch, Trombetti, C., Kawohl, Bernd, NITSCH, CARLO, L. Esposito   +11 more
core   +1 more source

Improved Upper‐Airway Collapse Imaging in Obstructive Sleep Apnea Using Self‐Supervised Spiral Variational Manifold Learning

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To propose a self‐supervised variational manifold learning framework for dynamic upper‐airway MRI reconstruction in obstructive sleep apnea from prospectively under‐sampled spiral data during natural sleep, without requiring fully sampled training data.
Md Shahin Ali, Wahidul Alam, Mathews Jacob, Sarv Priya, Douglas Van Daele, Junjie Liu, Sajan Goud Lingala   +6 more
wiley   +1 more source

On the Spectral Characterization of Prime Coprime Graphs Associated with Dihedral Groups

Science and Technology Indonesia
Spectral graph theory and group theory help reveal how the structure of graphs shapes their mathematical properties. This research aims to analyze the spectral descriptors of the prime coprime graph of a dihedral group associated with the Laplacian ...
Mamika Ujianita Romdhini, Abdurahim, Adem Kilicman, Dragan Pamucar, Faisal Al-Sharqi, Ifan Hasnan Dani, Marliadi Susanto   +6 more
doaj   +1 more source

Hypergraph p-Laplacian: A Differential Geometry View

, 2018
The graph Laplacian plays key roles in information processing of relational data, and has analogies with the Laplacian in differential geometry. In this paper, we generalize the analogy between graph Laplacian and differential geometry to the hypergraph ...
Mandic, Danilo, Saito, Shota, Suzuki, Hideyuki, Danilo Mandic, Shota Saito, Hideyuki Suzuki   +5 more
core   +1 more source

Identification of Novel CD52+ Fibroblasts in Nodular Prostatic Hyperplasia

The Prostate, EarlyView.
ABSTRACT Background Benign prostatic hyperplasia (BPH) and lower urinary tract symptoms are strongly associated with chronic prostate inflammation and stromal remodeling, yet the stromal cell programs that emerge during inflammatory, nodular remodeling remain incompletely defined. A Toxoplasma gondii infection model produces persistent inflammation and
Oliver R. Strobel, Hanyu Xia, James P. Ropa, Douglas W. Strand, Travis J. Jerde, Gustavo Arrizabalaga   +5 more
wiley   +1 more source

Laplacian of Gaussian Filter.

, 2016
Laplacian of Gaussian Filter.
Nor Ashidi Mat Isa (824825), Weng Chun Tan (3121980)   +1 more
core   +1 more source

Supervised Protein Structure Classification Using Topological Persistence With DeltaFold

Proteins: Structure, Function, and Bioinformatics, EarlyView.
ABSTRACT Recent advances in protein structure prediction have considerably increased the number of available structures, underscoring the need for scalable and accurate methods to compare and classify this huge amount of data. Current approaches based on sequence alignment or structural superposition often lack sensitivity and/or are computationally ...
Joseph Nardin‐Gennequin, Gabriela Ciuperca, Céline Brochier‐Armanet, Philippe Malbos   +3 more
wiley   +1 more source

Propagation of internal gravity waves: Optimal vertical discretisation and grid design based on numerical error analysis

Quarterly Journal of the Royal Meteorological Society, EarlyView.
An energy‐conserving discrete framework for the vertical discretisation of stratified ocean models is developed using internal gravity‐wave theory. A β$$ \beta $$‐indexed family of schemes is analysed through perturbation theory, revealing optimal parameter choices and grid designs that reduce truncation errors significantly.
Gabriel Derrida, Laurent Debreu, Florian Lemarié, Jérome Chanut   +3 more
wiley   +1 more source