Results 91 to 100 of about 4,654 (253)

Diffusion MRI of the Body: Beyond PGSE‐EPI

Journal of Magnetic Resonance Imaging, EarlyView.
ABSTRACT Diffusion magnetic resonance imaging (dMRI) is a widely used clinical imaging technique which is sensitive to changes in tissue microstructure including cellularity, perfusion, and tissue damage. DMRI has been used in whole‐body imaging as well as in targeted imaging of every major anatomical region.
Matthew T. Cherukara, Wenbo Sun, David Leitão, Shaihan Malik, Radhouene Neji, Joseph V. Hajnal, Andrada Ianus   +6 more
wiley   +1 more source

Discussing the Cutting Method of Skew Bevel Bear based on the Tooth Surface Generating Line

Jixie chuandong, 2020
The principle of tooth surface generating of skew bevel gear is analyzed about spherical involute， based on the theory that the line which in the plane that is tangent with the base cone of the skew bevel gear roll on the cone surface absolutely， a new ...
Baichao Wang, Xianting Lu, Litong Zhang, Zhenquan Xu, Xue Zhang   +4 more
doaj  

Tangent cones at infinity

Let $X\subset\mathbb{C}^m$ be an unbounded pure $k$-dimensional algebraic set. We define the tangent cones $C_{4, \infty}(X)$ and $C_{5,\infty}(X)$ of $X$ at infinity. We establish some of their properties and relations. We prove that $X$ must be an affine linear subspace of $\mathbb{C}^m$ provided that $C_{5, \infty}(X)$ has pure dimension $k$.
Dias, Luis Renato Gonçalves, Ribeiro, Nilva Rodrigues   +1 more
openaire   +2 more sources

Weight‐bearing computed tomography reveals greater anterior tibial translation and femorotibial rotation than magnetic resonance imaging in chronic anterior cruciate ligament deficiency: A prospective observational study

Knee Surgery, Sports Traumatology, Arthroscopy, EarlyView.
Abstract Purpose To compare anterior tibial translation and femorotibial rotation measurements obtained from conventional supine, non‐weight‐bearing magnetic resonance imaging (MRI) and weight‐bearing computed tomography (WBCT) in patients with chronic anterior cruciate ligament (ACL) tears. Methods WBCT of the knee acquired in full extension and at 30°
Renata Vidal Leão, Andre Giardino Moreira da Silva, Sandro Ricardo Benites Zelada, Catherina Zadeh, Carlos Felipe Teixeira Lobo, Riccardo Gomes Gobbi, Alexandre Leme Godoy‐Santos, Paulo Victor Partezani Helito, Camilo Partezani Helito   +8 more
wiley   +1 more source

The Two Extremal Rays of Some Hyper–Kähler Fourfolds

Mathematische Nachrichten, EarlyView.
ABSTRACT We consider projective Hyper–Kähler manifolds of dimension 4 that are deformation equivalent to Hilbert squares of K3 surfaces. In case such a manifold admits a divisorial contraction, the exceptional divisor is a conic bundle over a K3 surface. A classification of lattice embeddings implies that there are five types of such conic bundles.
Federica Galluzzi, Bert van Geemen
wiley   +1 more source

On the tangent cones to plurisubharmonic currents

Bulletin des Sciences Mathématiques, 2016
Let \(T\) be a positive plurisubharmonic (\(i\partial\overline\partial T\geq 0\)) or plurisuperharmonic (\(i\partial\overline\partial T\leq 0\)) current on a neighborhood of \(0\) in \({\mathbb C}^n\). One says that \(T\) has a tangent cone at \(0\) if the weak limit of the family of its homothetic currents exists.
Dabbek, Khalifa, Ghiloufi, Noureddine, Hbil, Jawhar   +2 more
openaire   +1 more source

Modeling Biocemented Sands: Hypoplastic Model for MICP‐Based Ground Improvement

International Journal for Numerical and Analytical Methods in Geomechanics, EarlyView.
ABSTRACT Bio‐cementation offers a sustainable and low‐carbon alternative to conventional ground improvement methods, aligning with the growing demand for green geotechnical solutions. To enable reliable numerical simulation of bio‐cemented soil behavior in engineering applications, advanced constitutive models are required to account for the effects of
Merita Tafili, Hossam Abdellatif, Nazanin Irani, Torsten Wichtmann   +3 more
wiley   +1 more source

On the structure of the geometric tangent cone to the Wasserstein space [PDF]

This article focuses on the metric orthogonal of the geometric tangent cone to the Wasserstein space. Some algebraic and topological properties are given, as well as a complete characterization and weak closedness property in dimension 1.
Aussedat, Averil
core  

Overshooting of Hypoplastic Models With Intergranular Strain: Manifestation, Implications and Remedy

International Journal for Numerical and Analytical Methods in Geomechanics, EarlyView.
ABSTRACT Intergranular strain extensions of hypoplasticity (IGS, ISA, GIS) are widely used to model small‐strain and cyclic soil behaviour. However, recent studies and our own simulations reveal that these models can exhibit stress overshooting not only under repeated small loading cycles but also during monotonic loading.
Jan Machaček, Merita Tafili, Carlos Grandas Tavera   +2 more
wiley   +1 more source

On the Cohen-Macaulay Property for Quadratic Tangent Cones [PDF]

The Electronic Journal of Combinatorics, 2016
Let $H$ be an $n$-generated numerical semigroup such that its tangent cone $\operatorname{gr}_\mathfrak{m} K[H]$ is defined by quadratic relations. We show that if $n<5$ then $\operatorname{gr}_\mathfrak{m} K[H]$ is Cohen-Macaulay, and for $n=5$ we explicitly describe the semigroups $H$ such that $\operatorname{gr}_\mathfrak{m} K[H]$ is not Cohen ...
openaire   +3 more sources