Results 41 to 50 of about 730,787 (266)
3-manifolds efficiently bound 4-manifolds
, 2007 It is known since 1954 that every 3-manifold bounds a 4-manifold. Thus, for instance, every 3-manifold has a surgery diagram. There are several proofs of this fact, including constructive proofs, but there has been little attention to the complexity of ...
Brock +27 more
core +1 more source
Exotic $$G_2$$-manifolds [PDF]
Mathematische Annalen, 2020 AbstractWe exhibit the first examples of closed 7-dimensional Riemannian manifolds with holonomy$$G_2$$G2that are homeomorphic but not diffeomorphic. These are also the first examples of closed Ricci-flat manifolds that are homeomorphic but not diffeomorphic.
Diarmuid Crowley, Johannes Nordström
openaire +4 more sources
Protein pyrophosphorylation by inositol pyrophosphates — detection, function, and regulation
FEBS Letters, EarlyView.Protein pyrophosphorylation is an unusual signaling mechanism that was discovered two decades ago. It can be driven by inositol pyrophosphate messengers and influences various cellular processes. Herein, we summarize the research progress and challenges of this field, covering pathways found to be regulated by this posttranslational modification as ...
Sarah Lampe +3 more
wiley +1 more source
Known Results and Open Problems in Hypercomplex Convexity
Analele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2014 A subject, which is treated in this review, combines in one bundle some questions of convex, hypercomplex analysis, probability theory and geometry.
Zelinskii Yuri
doaj +1 more source
3D Clumped Cell Segmentation Using Curvature Based Seeded Watershed
Journal of Imaging, 2016 Image segmentation is an important process that separates objects from the background and also from each other. Applied to cells, the results can be used for cell counting which is very important in medical diagnosis and treatment, and biological ...
Thomas Atta-Fosu +5 more
doaj +1 more source
Symplectic Lefschetz fibrations on S^1 x M^3
, 2000 In this paper we classify symplectic Lefschetz fibrations (with empty base locus) on a four-manifold which is the product of a three-manifold with a circle. This result provides further evidence in support of the following conjecture regarding symplectic
Chen, Weimin, Matveyev, Rostislav
core +1 more source
Function‐driven design of a surrogate interleukin‐2 receptor ligand
FEBS Letters, EarlyView.Interleukin (IL)‐2 signaling can be achieved and precisely fine‐tuned through the affinity, distance, and orientation of the heterodimeric receptors with their ligands. We designed a biased IL‐2 surrogate ligand that selectively promotes effector T and natural killer cell activation and differentiation. Interleukin (IL) receptors play a pivotal role in
Ziwei Tang +9 more
wiley +1 more source
Markov-Embedded Affinity Learning with Connectivity Constraints for Subspace Clustering
Applied SciencesSubspace clustering algorithms have demonstrated remarkable success across diverse fields, including object segmentation, gene clustering, and recommendation systems.
Wenjiang Shao, Xiaowei Zhang
doaj +1 more source
Molecules, 2017 Detecting genomes with similar expression patterns using clustering techniques plays an important role in gene expression data analysis. Non-negative matrix factorization (NMF) is an effective method for clustering the analysis of gene expression data ...
Rong Zhu +3 more
doaj +1 more source
Low-pressure nozzle with aerodynamic fuel atomization
Весці Нацыянальнай акадэміі навук Беларусі: Серыя фізіка-тэхнічных навук, 2020 A research was carried out with the construction of a model of a low-pressure nozzle with aerodynamic fuel atomization, which shows the advantages of nozzles of this type.
S. S. Tihonchik, N. I. Puchko
doaj +1 more source