Results 41 to 50 of about 1,910,808 (298)

A Parameter Division Based Method for the Geometrical Calibration of X-Ray Industrial Cone-Beam CT

open access: yesIEEE Access, 2018
For X-ray cone-beam computed tomography (CBCT), non-calibrated system geometry causes indistinct and blurring artifacts in reconstructed images, which impacts on the image quality badly.
Kai Xiao   +5 more
doaj   +1 more source

Comparative study of macroscopic quantum tunneling in Bi_2Sr_2CaCu_2O_y intrinsic Josephson junctions with different device structures [PDF]

open access: yes, 2009
We investigated macroscopic quantum tunneling (MQT) of Bi$_2$Sr$_2$CaCu$_2$O$_y$ intrinsic Josephson junctions (IJJs) with two device structures. One is a nanometer-thick small mesa structure with only two or three IJJs and the other is a stack of a few ...
Hamada, K.   +8 more
core   +2 more sources

Artificial Noise Aided Hybrid Analog-Digital Beamforming for Secure Transmission in MIMO Millimeter Wave Relay Systems

open access: yesIEEE Access, 2019
Millimeter wave (mm-wave) communications, especially mm-wave relay systems, have been considered as a key technology for next-generation wireless networks due to the rich spectrum resources.
Shaoyu Wang   +5 more
doaj   +1 more source

Switching Investments

open access: yesTheoretical Computer Science, 2010
We present a simple online two-way trading algorithm that exploits fluctuations in the unit price of an asset. Rather than analysing worst-case performance under some assumptions, we prove a novel, unconditional performance bound that is parameterised either by the actual dynamics of the price of the asset, or by a simplifying model thereof.
Koolen, W.M., de Rooij, S.
openaire   +3 more sources

Why and When Are Evidence‐Based Interventions Adopted in Paediatric Supportive Care? A Qualitative Exploration of the Determinants of Photobiomodulation Implementation

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Background Oral mucositis is a common and debilitating side effect of childhood cancer and stem cell transplant treatments. It affects the quality of life of children and young people (CYP) and places a strain on services. Photobiomodulation is recommended for oral mucositis prevention in international guidance but is poorly implemented in UK ...
Claudia Heggie   +4 more
wiley   +1 more source

A Two-Layer Secure Quantization Algorithm for Secret Key Generation With Correlated Eavesdropping Channel

open access: yesIEEE Access, 2019
When the eavesdropping channel has a certain correlation with the legitimate channel, the physical layer key is susceptible to eavesdroppers. To ensure the security of the secret key, we propose a two-layer secure (TLS) quantization algorithm in this ...
Henglei Jin   +5 more
doaj   +1 more source

Effect of Antiferromagnetic Interlayer Coupling on Current-Assisted Magnetization Switching

open access: yes, 2003
We compare magnetization switching in Co/Cu/Co nanopillars with uncoupled and dipole-field coupled Co layers. In uncoupled nanopillars, current-driven switching is hysteretic at low magnetic field H and changes to reversible, characterized by telegraph ...
H. Kurt   +4 more
core   +1 more source

Heterogeneous expectations in the foreign exchange market : evidence from the daily Dollar/DM exchange rate [PDF]

open access: yes, 2003
In this study a regime switching approach is applied to estimate the chartist and fundamentalist (c&f) exchange rate model originally proposed by Frankel and Froot (1986).
Ahrens, Ralf, Reitz, Stefan
core   +1 more source

Adherence to Protocol Recommendations for Children With Wilms Tumour in Two Consecutive Studies in the United Kingdom and Ireland—Does Variation Matter?

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Background and Aims Wilms tumour (WT) has excellent event‐free and overall survival (OS). However, small differences exist between countries participating in the same international study. This led us to examine variation in adherence to protocol recommendations as a potential contributing factor.
Suzanne Tugnait   +23 more
wiley   +1 more source

On a connection between the switching separability of a graph and that of its subgraphs

open access: yes, 2011
A graph of order $n>3$ is called {switching separable} if its modulo-2 sum with some complete bipartite graph on the same set of vertices is divided into two mutually independent subgraphs, each having at least two vertices.
D. S. Krotov   +6 more
core   +1 more source

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