Results 41 to 50 of about 645,712 (359)

Interpretation of saddle-splay and the Oseen-Frank free energy in liquid crystals [PDF]

Liquid Crystals Reviews, 2018
This article re-examines a classic question in liquid-crystal physics: What are the elastic modes of a nematic liquid crystal? The analysis uses a recent mathematical construction, which breaks the director gradient tensor into four distinct types of ...
Jonathan V Selinger
semanticscholar   +1 more source

Structurally unstable quadratic vector fields of codimension two: families possessing a finite saddle-node and an infinite saddle-node

Electronic Journal of Qualitative Theory of Differential Equations, 2021
In 1998, Artés, Kooij and Llibre proved that there exist 44 structurally stable topologically distinct phase portraits modulo limit cycles, and in 2018 Artés, Llibre and Rezende showed the existence of at least 204 (at most 211) structurally unstable ...
Joan Artés, Marcos Mota, Alex Rezende
doaj   +1 more source

Saddle Position-Based Method for Extraction of Depressions in Fengcong Areas by Using Digital Elevation Models

ISPRS International Journal of Geo-Information, 2018
A karst depression is an important sign of the development stage of karst landforms. The morphological characteristics of depressions can help reflect the development and evolution process of such landforms.
Xianwu Yang, Guoan Tang, Xin Meng, Liyang Xiong   +3 more
doaj   +1 more source

The Region of Validity of Homogeneous Nucleation Theory [PDF]

, 1999
We examine the region of validity of Langer's picture of homogeneous nucleation. Our approach is based on a coarse-grained free energy that incorporates the effect of fluctuations with momenta above a scale k.
A. Strumia, Adams, C. Wetterich, Csernai, N. Tetradis, Strumia, Wetterich   +6 more
core   +4 more sources

A Systematic Approach to Comparing Thermal Activity of the Thoracic Region and Saddle Pressure Distribution beneath the Saddle in a Group of Non-Lame Sports Horses

Animals, 2021
Thermography is a non-invasive method for measuring surface temperatures and may be a convenient way of identifying hypo/hyperthermic areas under a saddle that may be related to saddle pressures.
Russell MacKechnie-Guire, Mark Fisher, Helen Mathie, Kat Kuczynska, Vanessa Fairfax, Diana Fisher, Thilo Pfau   +6 more
doaj   +1 more source

Two-terminal conductance fluctuations in the integer quantum Hall regime [PDF]

, 1999
Motivated by recent experiments on the conductance fluctuations in mesoscopic integr quantum Hall systems, we consider a model in which the Coulomb interactions are incorporated into the picture of edge-state transport through a single saddle-point.
A. G. Galstyan, A. K. Geim, A. L. Efros, A. Morgan, B. Huckestein, B. I. Halperin, B. Jovanović, C. V. Brown, C. W. J. Beenakker, Chang-Ming Ho, D. H. Cobden, D. H. Cobden, D. H. Cobden, D. L. Maslov, D.E. Khmel’nitskii, D.E. Khmel’nitskii, H. A. Fertig, J. A. Simmons, J. K. Jain, J. M. Kinaret, M. Büttiker, M. Büttiker, P. A. Lee, P. A. Lee, P. C. Main, S. B. Kaplan, S. Cho, S. Das Sarma, S. Washburn, S. Xiong, T. Ando, T. Ando, W. J. Skocpol, Z. Wang   +33 more
core   +2 more sources

Complex saddle points in QCD at finite temperature and density

, 2014
The sign problem in QCD at finite temperature and density leads naturally to the consideration of complex saddle points of the action or effective action.
Nishimura, Hiromichi, Ogilvie, Michael C., Pangeni, Kamal   +2 more
core   +1 more source

Distributed Economic Dispatch Control via Saddle Point Dynamics and Consensus Algorithms

IEEE Transactions on Control Systems Technology, 2019
In this brief, a distributed control algorithm is proposed to solve the economic dispatch problem. Without a central control unit, the generators work collaboratively to minimize the generation cost while balancing the supply and demand.
Lu Bai, Maojiao Ye, Chao Sun, G. Hu
semanticscholar   +1 more source

Saddle Pulmonary Embolism in Patients with Cancer in the Era of Incidental Events: Clinical Findings and Outcomes in a Single Centre Cohort

TH Open, 2022
Background There is scarce information regarding the prevalence and clinical impact of saddle pulmonary embolism (PE) in patients with cancer. Objectives This study aimed to assess the prevalence, clinical findings, and short-term outcomes of ...
Mario Aramberri, Mariana Benegas, Marcelo Sanchez, Diego Muñoz-Guglielmetti, Carles Zamora, Adrián García-Villa, Carmen Diaz-Pedroche, Carme Font   +7 more
doaj   +1 more source

Saddle point states and energy barriers for vortex entrance and exit in superconducting disks and rings

, 2000
The transitions between the different vortex states of thin mesoscopic superconducting disks and rings are studied using the non-linear Ginzburg-Landau functional.
Baelus, B. J., Peeters, F. M., Schweigert, V. A.   +2 more
core   +1 more source