Results 141 to 150 of about 676,989 (383)

Wecken type problems for self-maps of the Klein bottle

Fixed Point Theory and Applications, 2006
We consider various problems regarding roots and coincidence points for maps into the Klein bottle K. The root problem where the target is K and the domain is a compact surface with non-positive Euler characteristic is studied.
M. R. Kelly, D. L. Gonçalves
doaj   +1 more source

Error Analysis of Radar Coincidence Imaging in the Presence of Noise

Leida xuebao, 2014
Radar coincidence imaging is a new method for high-resolution staring imaging. First, the mathematical model is constructed. Second, the theoretical error for radar coincidence imaging in the presence of noise is derived using the parametric imaging ...
Dai Qiang, Cheng Yong-qiang, Qin Yu-liang, Wang Hong-qiang, Li Xiang   +4 more
doaj   +1 more source

Note on the Observations for Coincidence of the Collimators through the Cube of the Transit Circle at the Royal Observatory, Greenwich [PDF]

, 1886
H. H. Turner
openalex   +1 more source

Combining Metal Additive Manufacturing and Casting Technology: High Performance Cooling Channels for Electric Powertrain Components

Advanced Engineering Materials, EarlyView.
When realized as inserts in high‐pressure die casting, aluminum cooling channels for electric powertrain components and similar applications typically require a stabilizing filler to survive the process. The present study investigates relinquishing this filler using additively manufactured inserts promising performance improvements.
Dirk Lehmhus, Gefei Li, Martin Czekalla, Leonardo Fernandes Gomes, Christoph Pille, Hermann Pleteit, Adrian Struss, Keno Toussaint, Andre Irretier, Münip Dalgic   +9 more
wiley   +1 more source

Guillain-Barré syndrome associated with SARS-CoV-2 infection: causality or coincidence?

Lancet Neurology, 2020
Huang-ning Zhao, Dingding Shen, Haiyan Zhou, Jun Liu, Sheng Chen   +4 more
semanticscholar   +1 more source

Observation of a neutrino burst in coincidence with supernova 1987A in the Large Magellanic Cloud.

Physical Review Letters, 1987
A burst of eight neutrino events preceding the optical detection of the supernova in the Large Magellanic cloud has been observed in a large underground water Cherenkov detector. The events span an interval of six seconds and have visible energies in the
R. Bionta, G. Blewitt, C. B. Bratton, D. Casper, A. Ciocio, R. Claus, B. Cortez, M. Crouch, S. Dye, S. Errede, G. Foster, W. Gajewski, K. Ganezer, M. Goldhaber, T. Haines, T. Jones, D. Kiełczewska, W. Kropp, J. Learned, J. LoSecco, J. Matthews, Richard S. Miller, M. Mudan, H.-S. Park, L. Price, F. Reines, J. Schultz, S. Seidel, E. Shumard, D. Sinclair, H. Sobel, J. Stone, L. Sulak, R. Svoboda, G. Thornton, J. Velde, C. Wuest   +36 more
semanticscholar   +1 more source

Evaluating Dielectric Properties for Semicrystalline Thermoplastics to Analyze the Thermal and Rheological Properties in Laser‐Based Powder Bed Fusion of Plastics

Advanced Engineering Materials, EarlyView.
This study aims to establish a link between the dielectric properties of polyamide 12 (PA12) and its thermal and rheological properties using dielectric analysis (DEA). A standardized methodology is introduced to determine melting and crystallization temperatures.
Benedikt Burchard, Joseph Hofmann, Katrin Wudy   +2 more
wiley   +1 more source

On the Coincidence of the Bright Lines of the Oxygen Spectrum with Bright Lines in the Solar Spectrum [PDF]

, 1879
H. Draper
openalex   +1 more source

Toughness of Confined Auxetic Foams

Advanced Engineering Materials, EarlyView.
Auxetic (negative Poisson's ratio) materials offer benefits such as impact mitigation, thermal insulation, vibration damping, and reduced shear strain, although their fracture mechanics are largely unexplored. This study investigates damage initiation and propagation in confined re‐entrant auxetic foams from polyurethane via experimental ...
Adrianos E. F. Athanasiadis, Oliver Duncan, Michal K. Budzik, Marcelo A. Dias   +3 more
wiley   +1 more source

Spatial Relations along the In-On Continuum in Thai Sign Language

Journal of the Southeast Asian Linguistics Society, 2019
Spatial relations along the IN-ON continuum are primarily expressed in Thai Sign Language (ThSL) through classifier constructions. In these constructions, the signer articulates the lexical sign for the ground and then its classifier using his non ...
Cassie Wallace
doaj