Results 81 to 90 of about 940,882 (376)

The Constant Inapproximability of the Parameterized Dominating Set Problem [PDF]

, 2015
We prove that there is no fpt-algorithm that can approximate the dominating set problem with any constant ratio, unless FPT= W[1]. Our hardness reduction is built on the second author's recent W[1]-hardness proof of the biclique problem.
Chen, Yijia, Lin, Bingkai
core   +1 more source

Purkinje Cell Loss in Essential Tremor: Collective Data From 215 Brains Over a 21‐Year Period

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Essential tremor is a highly prevalent movement disorder. Pathological changes observed in essential tremor cerebella center around Purkinje cells and neighboring neuronal populations. Postmortem studies have variably, but not always, shown reduced Purkinje cell counts in essential tremor compared to controls.
Chloë A. Kerridge, Roberto S. Hernandez, Nora C. Hernandez, Phyllis L. Faust, Elan D. Louis   +4 more
wiley   +1 more source

Tight Hardness for Shortest Cycles and Paths in Sparse Graphs [PDF]

ACM-SIAM Symposium on Discrete Algorithms, 2017
Fine-grained reductions have established equivalences between many core problems with $\tilde{O}(n^3)$-time algorithms on $n$-node weighted graphs, such as Shortest Cycle, All-Pairs Shortest Paths (APSP), Radius, Replacement Paths, Second Shortest Paths,
Andrea Lincoln, V. V. Williams, Richard Ryan Williams   +2 more
semanticscholar   +1 more source

Sensitivity study of crack driving force predictions in heterogeneous welds using Vickers hardness maps [PDF]

, 2016
Weld flaws often require an engineering critical assessment (ECA) to judge on the necessity for weld repair. ECA is a fracture mechanics based prediction of the integrity of welds under operating conditions.
De Waele, Wim, Hertelé, Stijn, Naib, Sameera, Van Minnebruggen, Koen   +3 more
core  

Thermodynamic aspects of materials' hardness: prediction of novel superhard high-pressure phases

, 2011
In the present work we have proposed the method that allows one to easily estimate hardness and bulk modulus of known or hypothetical solid phases from the data on Gibbs energy of atomization of the elements and corresponding covalent radii.
Aleshin V. G., Babichev A. P., Baron N. M., Bulakh A. G., Domnich V., Emsley J., Glushko V. P., Goble R. J., Gurvich L. V., Haines J., Knunyants I. L., Kurdyumov A. V., Mukhanov V. A., Novikov N. V., O. O. Kurakevych, Poliakov V. P., Povarennykh A. S., Rabinovich V. A., Teter D. M., Trim D. L., V. A. Mukhanov, V. L. Solozhenko   +21 more
core   +1 more source

Bayesian Estimation of Hardness Ratios: Modeling and Computations [PDF]

, 2006
A commonly used measure to summarize the nature of a photon spectrum is the so-called Hardness Ratio, which compares the number of counts observed in different passbands.
Andreas Zezas, Aneta Siemiginowska, Bradford J. Wargelin, Craig Heinke, David A. van Dyk, Geman S., Hasinger G., Pallavicini R., Reale F., Reale F., Serio S., Taeyoung Park, van den Oord G. H. J., Vinay L. Kashyap   +13 more
core   +2 more sources

Effect of Nonsteroidal Anti‐Inflammatory Drugs on Sacroiliac Joint Inflammation, as Seen on Magnetic Resonance Imaging, in Axial Spondyloarthritis

Arthritis Care &Research, EarlyView.
Objective Imaging evidence of active sacroiliitis is important for diagnosis, classification, and monitoring of axial spondyloarthritis (axSpA). However, there is no consistent guidance on whether patients should temporarily stop nonsteroidal anti‐inflammatory drugs (NSAIDs) before magnetic resonance imaging (MRI).
Gareth T. Jones, Alexander N. Bennett, Raj Sengupta, Pedro M. Machado, Helena Marzo‐Ortega, Lorna Aucott, Margaret A. Hall‐Craggs, Timothy J. P. Bray, Alan Bainbridge, Ruaridh M. Gollifer, Gary J. Macfarlane   +10 more
wiley   +1 more source

The Effect of Heat Treatment on Mechanical Properties of Cu-0.93 mass％Ni-0.24 mass％P Alloy [PDF]

, 2019
Cu-Ni-P alloys are the typical precipitation-hardening material. Thus, Cu-Ni-P alloys are expected to apply alternative materials for heat-exchanger tubes.
安藤 哲也, 河野 浩三, 稲垣 達
core   +1 more source

Global Cardinality Constraints Make Approximating Some Max-2-CSPs Harder [PDF]

, 2019
Assuming the Unique Games Conjecture, we show that existing approximation algorithms for some Boolean Max-2-CSPs with cardinality constraints are optimal. In particular, we prove that Max-Cut with cardinality constraints is UG-hard to approximate within ~
Austrin, Per, Stankovic, Aleksa
core   +2 more sources

Lived and care experiences of chronic musculoskeletal shoulder pain in Australian adults: A qualitative study

Arthritis Care &Research, Accepted Article.
Objectives Australian evidence on lived and care experiences of chronic musculoskeletal shoulder pain (CMSP), irrespective of disorder classification or disease, is limited. However, such evidence is important for person‐centred care and informing local service pathways and care guidelines or standards.
Sonia Ranelli, Joanne E. Jordan, Ilana N. Ackerman, Alison Thorpe, Jennifer G. Persaud, Linda J. Woodhouse, Jason Chua, Ben Horgan, Andrew M. Briggs   +8 more
wiley   +1 more source