Results 61 to 70 of about 175,549 (222)

Graph partitioning by Eigenvectors

Linear Algebra and its Applications, 1988
AbstractLet A be the adjacency matrix of a connected graph G. If z is a column vector, we say that a vertex of G is positive, nonnegative, null, etc. if the corresponding entry of z has that property. For z such that Az⩾az, we bound the number of components in the subgraph included by positive vertices.
openaire   +2 more sources

Novel CT radiomics models for the postoperative prediction of early recurrence of resectable pancreatic adenocarcinoma: A single‐center retrospective study in China

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract Purpose To assess the predictive capability of CT radiomics features for early recurrence (ER) of pancreatic ductal adenocarcinoma (PDAC). Methods Postoperative PDAC patients were retrospectively selected, all of whom had undergone preoperative CT imaging and surgery. Both patients with resectable or borderline‐resectable pancreatic cancer met
Xinze Du, Yongsu Ma, Kexin Wang, Xiejian Zhong, Jianxin Wang, Xiaodong Tian, Xiaoying Wang, Yinmo Yang   +7 more
wiley   +1 more source

Spinal Cord Abnormalities in Early Pediatric Multiple Sclerosis

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Spinal cord lesions and atrophy in the cervical region are common in adult multiple sclerosis (MS) and correlate with disability. Whether similar abnormalities occur in pediatric MS patients is largely unknown. Clinical and MRI evaluations were performed in 38 pediatric MS patients and 13 healthy controls (HC).
Monica Margoni, Paola Valsasina, Paolo Preziosa, Martina Rubin, Mor Gueye, Lucia Moiola, Maria Assunta Rocca, Massimo Filippi   +7 more
wiley   +1 more source

Beyond pairwise clustering [PDF]

, 2005
We consider the problem of clustering in domains where the affinity relations are not dyadic (pairwise), but rather triadic, tetradic or higher. The problem is an instance of the hypergraph partitioning problem.
Agarwal, Sameer, Belongie, Serge, Kriegman, David, Lim, Jongwoo, Perona, Pietro, Zelnik-Manor, Lihi   +5 more
core   +2 more sources

Graph colourings and partitions

Theoretical Computer Science, 2001
AbstractIn this paper we have investigated mainly the three colouring parameters of a graph G, viz., the chromatic number, the achromatic number and the pseudoachromatic number. The importance of their study in connection with the computational complexity, partitions, algebra, projective plane geometry and analysis were briefly surveyed.
openaire   +2 more sources

Histone Deacetylase 6 Brain PET in Amyotrophic Lateral Sclerosis‐Frontotemporal Spectrum Disorder

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective [18F]EKZ‐001 is a positron emission tomography (PET) tracer targeting histone deacetylase 6 (HDAC6), an enzyme responsible for intracellular transport and clearance of misfolded proteins. HDAC6 modulation is a promising treatment strategy in neurodegenerative disorders, including amyotrophic lateral sclerosis (ALS).
Greet Vanderlinden, Charles Carron, Donatienne Van Weehaeghe, Joke De Vocht, Fouke Ombelet, Pegah Masrori, Caro De Weerdt, Rebecca E. James, Lauren T. Evans, Frederick A. Schroeder, Jacob M. Hooker, Michel Koole, Janice E. Kranz, Tonya M. Gilbert, Philip Van Damme, Koen Van Laere   +15 more
wiley   +1 more source

Nonuniform Graph Partitioning with Unrelated Weights

, 2014
We give a bi-criteria approximation algorithm for the Minimum Nonuniform Partitioning problem, recently introduced by Krauthgamer, Naor, Schwartz and Talwar (2014).
Makarychev, Konstantin, Makarychev, Yury
core   +1 more source

Partitioning a graph into a cycle and a sparse graph

Discrete Mathematics, 2023
In this paper we investigate results of the form "every graph $G$ has a cycle $C$ such that the induced subgraph of $G$ on $V(G)\setminus V(C)$ has small maximum degree." Such results haven't been studied before, but are motivated by the Bessy and Thomass Theorem which states that the vertices of any graph $G$ can be covered by a cycle $C_1$ in $G ...
openaire   +3 more sources

Longitudinal Relationship Between Pain and Depression in People With Inflammatory Arthritis: A Narrative Review

Arthritis Care &Research, EarlyView.
As many patients with inflammatory arthritis (IA) have chronic pain, understanding how to best assess and manage pain in IA is a priority. Comorbid depression is prevalent in adults with IA, affecting 15% to 39% of people. Although pain and depression are thought to be associated in IA, this concept is largely based on cross‐sectional data.
Natasha Cox, Saeed Farooq, Helen Twohig, Ian C. Scott   +3 more
wiley   +1 more source

Analysis of the Longitudinal Behavior of Serum Levels of Soluble Flt1 and Placental Growth Factor in Pregnant Patients With Systemic Lupus Erythematosus

Arthritis Care &Research, EarlyView.
Objective This study analyzed longitudinal trajectories of soluble Flt1 (sFlt1) levels, placenta growth factor (PlGF) levels, and sFlt1:PlGF ratios in a cohort of pregnant patients with systemic lupus erythematosus (SLE). Methods Blood samples were collected (14–18, 24–26, 30–32, 34–36, and 38–40 weeks), stored at −80°C, and evaluated for serum levels ...
Nilson R. de Jesús, Guilherme R. de Jesús, Marcela I. Lacerda, Flávia C. dos Santos, Jeane de S Nogueira, Luiz Cristóvão Porto, Evandro S. F. Coutinho, Evandro M. Klumb   +7 more
wiley   +1 more source