Results 61 to 70 of about 724,853 (235)

Topological signatures in CMB temperature anisotropy maps

, 2005
We propose an alternative formalism to simulate CMB temperature maps in $\Lambda$CDM universes with nontrivial spatial topologies. This formalism avoids the need to explicitly compute the eigenmodes of the Laplacian operator in the spatial sections ...
Gomero, G. I., Hipolito-Ricaldi, W. S.
core   +1 more source

New Developments in the Field of Production and Application of Multi‐Material Wire Arc Additive Manufacturing Components: A Review

Advanced Engineering Materials, EarlyView.
The utilization of direct energy deposition (DED)‐arc additive manufacturing processes in industrial applications is increasing, and these processes have the potential for multi‐material applications. This work provides a overview of the state of research in DED‐arc made functional graded structures, to establish a link to potential industrial ...
Kai Treutler, Volker Wesling
wiley   +1 more source

Optimal Lewenstein-Sanpera Decomposition for some Biparatite Systems

, 2003
It is shown that for a given bipartite density matrix and by choosing a suitable separable set (instead of product set) on the separable-entangled boundary, optimal Lewenstein-Sanpera (L-S) decomposition can be obtained via optimization for a generic ...
Akhtarshenas S J, Akhtarshenas S J Jafarizadeh M A, Badziag P Deuar P Horodecki M Horodecki P Horodecki R, Bennett C H, Eckert K, Horodecki M, Horodecki R, Karnas S Lewenstein M, Lozinski A Buchleitner A Zyczkowski K Wellens T, M A Jafarizadeh, Pittenger A O Rubin M H, Rungta P, Rungta P Caves C M, S J Akhtarshenas, Uhlmann A, Vedral V, Wellens T, Werner R F   +17 more
core   +1 more source

Electrospark‐Deposited AlCrFeCoNi High‐Entropy Alloy Coatings on Steel: Microstructure Evolution, Mechanical Properties, and Corrosion Response

Advanced Engineering Materials, EarlyView.
AlCrFeCoNi high entropy alloy coating is applied on steel using electrospark deposition. The microstructure evolution and phase transformation of the as‐deposited and heat‐treated coatings is characterized and discussed. Reduced microhardness and yield strength are measured after heat treatment.
Jihui Yan, Roozbeh Abbasi, Xiaoye Zhao, Peng Peng, Norman Yunhong Zhou   +4 more
wiley   +1 more source

WSN key recovery attack based on symmetric matrix decomposition

Tongxin xuebao, 2018
The key protocol is one of the crucial technologies to ensure the security for wireless sensor network（WSN）.Parakh,et al.proposed a key agreement for WSN based on matrix decomposition.However,the study revealed that the protocol had security risks.A key ...
Xiangmin JI, Bo ZHAO, Jinhui LIU, Jianwei JIA, Huanguo ZHANG, Shuang XIANG   +5 more
doaj  

A New Matrix Model for Noncommutative Field Theory

, 2003
We describe a new regularization of quantum field theory on the noncommutative torus by means of one-dimensional matrix models. The construction is based on the Elliott-Evans inductive limit decomposition of the noncommutative torus algebra.
Alexandrov, Ambjørn, Ambjørn, Ambjørn, Bars, Becchi, Bietenholz, Boca, Douglas, Elliott, Fedele Lizzi, Giovanni Landi, Gopakumar, Gopakumar, Grosse, Gubser, Kajiura, Klebanov, Konechny, Krajewski, Landi, Langmann, Lizzi, Mandal, Martinec, Martinec, McGreevy, McGreevy, Minwalla, Richard J. Szabo, Rieffel, Sahraoui, Szabo   +32 more
core   +1 more source

Additive Manufacturing of Gradient Stiffness Honeycombs Using Thermoplastic Polyurethane Composite Material Variations

Advanced Engineering Materials, EarlyView.
By combining porous, solid, and carbon fiber‐reinforced thermoplastic polyurethane within a single 3D printed honeycomb structure, this current work achieved precise control over spatial stiffness while ensuring strong interlayer adhesion. The findings demonstrate enhanced energy absorption and densification strain, outperforming traditional uniform ...
Savvas Koltsakidis, Konstantinos Tsongas, Dimitrios Tzetzis   +2 more
wiley   +1 more source

Numerical Model and Experimental Validation of Composite Metal Foam in Protecting Carbon Steel Against Puncture

Advanced Engineering Materials, EarlyView.
The puncture prevention and energy absorption performance of composite metal foam (CMF) are studied experimentally and numerically for hazardous materials transportation protection. The numerical model implementing air within the CMF (nonhomogeneous model using fluid cavity technique) predicts puncture more accurately compared to the homogeneous CMF ...
Aman Kaushik, Afsaneh Rabiei
wiley   +1 more source

On relationships between two linear subspaces and two orthogonal projectors

Special Matrices, 2019
Sum and intersection of linear subspaces in a vector space over a field are fundamental operations in linear algebra. The purpose of this survey paper is to give a comprehensive approach to the sums and intersections of two linear subspaces and their ...
Tian Yongge
doaj   +1 more source

An Integer Linear Programming Formulation for the Minimum Cardinality Segmentation Problem

Algorithms, 2015
In this article, we investigate the Minimum Cardinality Segmentation Problem (MCSP), an NP-hard combinatorial optimization problem arising in intensity-modulated radiation therapy.
Daniele Catanzaro, Céline Engelbeen
doaj   +1 more source