scholarly journals Synchronous Stream Encryption Using an Additional Channel to Set the Key

2021 ◽  
Vol 190 ◽  
pp. 797-802
Author(s):  
Aleksander B. Vavrenyuk ◽  
Victor V. Makarov ◽  
Victor A. Shurygin
Keyword(s):  
Additional Channel

scholarly journals Object-level Segmentation of RGBD Data

2014 ◽  
Vol II-3 ◽  
pp. 73-78 ◽  
Author(s):  
H. Huang ◽  
H. Jiang ◽  
C. Brenner ◽  
H. Mayer
Keyword(s):  
Global Optimization ◽  
Solid Body ◽  
Point Cloud ◽  
3D Model ◽  
3D Point Cloud ◽  
Indoor Scenes ◽  
Novel Method ◽  
3D Information ◽  
Object Level ◽  
Additional Channel

We propose a novel method to segment Microsoft™Kinect data of indoor scenes with the emphasis on freeform objects. We use the full 3D information for the scene parsing and the segmentation of potential objects instead of treating the depth values as an additional channel of the 2D image. The raw RGBD image is first converted to a 3D point cloud with color. We then group the points into patches, which are derived from a 2D superpixel segmentation. With the assumption that every patch in the point cloud represents (a part of) the surface of an underlying solid body, a hypothetical quasi-3D model – the "synthetic volume primitive" (SVP) is constructed by extending the patch with a synthetic extrusion in 3D. The SVPs vote for a common object via intersection. By this means, a freeform object can be "assembled" from an unknown number of SVPs from arbitrary angles. Besides the intersection, two other criteria, i.e., coplanarity and color coherence, are integrated in the global optimization to improve the segmentation. Experiments demonstrate the potential of the proposed method.

scholarly journals Tuning friction to a superlubric state via in-plane straining

2019 ◽  
Vol 116 (49) ◽  
pp. 24452-24456 ◽  
Author(s):  
Shuai Zhang ◽  
Yuan Hou ◽  
Suzhi Li ◽  
Luqi Liu ◽  
Zhong Zhang ◽  
...  
Keyword(s):  
Atomic Scale ◽  
Atomistic Simulations ◽  
Contact Interface ◽  
Frictional Behavior ◽  
Flexible Materials ◽  
On Demand ◽  
Scale Structures ◽  
Unusual Strain ◽  
Strain Dependent ◽  
Additional Channel

Controlling, and in many cases minimizing, friction is a goal that has long been pursued in history. From the classic Amontons–Coulomb law to the recent nanoscale experiments, the steady-state friction is found to be an inherent property of a sliding interface, which typically cannot be altered on demand. In this work, we show that the friction on a graphene sheet can be tuned reversibly by simple mechanical straining. In particular, by applying a tensile strain (up to 0.60%), we are able to achieve a superlubric state (coefficient of friction nearly 0.001) on a suspended graphene. Our atomistic simulations together with atomically resolved friction images reveal that the in-plane strain effectively modulates the flexibility of graphene. Consequently, the local pinning capability of the contact interface is changed, resulting in the unusual strain-dependent frictional behavior. This work demonstrates that the deformability of atomic-scale structures can provide an additional channel of regulating the friction of contact interfaces involving configurationally flexible materials.

Pulsed Low-energy Ion-beam Induced Nucleation and Growth of Ge Nanocrystals on SiO2

2007 ◽  
Vol 1020 ◽  
Author(s):  
Anatoly Dvurechenskii ◽  
Nataly Stepina ◽  
Pavel Novikov ◽  
Vladislav Armbrister ◽  
Valery Kesler ◽  
...  
Keyword(s):  
Kinetic Monte Carlo ◽  
Ion Beam ◽  
Memory Device ◽  
Low Energy ◽  
Nanocrystal Size ◽  
Flux Variation ◽  
Layer Deposition ◽  
Array Density ◽  
Ge Nanocrystals ◽  
Additional Channel

AbstractPulsed low-energy (200 eV) ion-beam-induced nucleation during Ge deposition on thin SiO2 film was used to form dense homogeneous arrays of Ge nanocrystals. The ion-beam action is shown to stimulate the nucleation of Ge nanocrystals when being applied after thin Ge layer deposition. Temperature and flux variation was used to optimize the nanocrystal size and array density required for memory device. Kinetic Monte Carlo simulation shows that ion impacts open an additional channel of atom displacement from a nanocrystal onto SiO2 surface. This results both in decrease of the average nanocrystal size and in increase of nanocrystal density.

An additional channel for FM signal transmission in standard fiber-optic AM communication lines

2015 ◽  
Vol 41 (11) ◽  
pp. 1083-1086
Author(s):  
V. V. Lebedev ◽  
K. M. Anufriev ◽  
N. V. Toguzov ◽  
I. V. Il’ichev ◽  
A. V. Shamray
Keyword(s):  
Fiber Optic ◽  
Signal Transmission ◽  
Communication Lines ◽  
Additional Channel

scholarly journals Regulation of Kir Channels by Intracellular pH and Extracellular K+

2004 ◽  
Vol 123 (4) ◽  
pp. 441-454 ◽  
Author(s):  
Anke Dahlmann ◽  
Min Li ◽  
ZhongHua Gao ◽  
Deirdre McGarrigle ◽  
Henry Sackin ◽  
...  
Keyword(s):  
Ion Selectivity ◽  
Transmembrane Helix ◽  
Ph Sensor ◽  
Outer Part ◽  
Selectivity Filter ◽  
Inward Rectification ◽  
Ion Binding ◽  
Enhanced Sensitivity ◽  
Internal Ph ◽  
Additional Channel

ROMK channels are regulated by internal pH (pHi) and extracellular K+ (K+o). The mechanisms underlying this regulation were studied in these channels after expression in Xenopus oocytes. Replacement of the COOH-terminal portion of ROMK2 (Kir1.1b) with the corresponding region of the pH-insensitive channel IRK1 (Kir 2.1) produced a chimeric channel (termed C13) with enhanced sensitivity to inhibition by intracellular H+, increasing the apparent pKa for inhibition by ∼0.9 pH units. Three amino acid substitutions at the COOH-terminal end of the second transmembrane helix (I159V, L160M, and I163M) accounted for these effects. These substitutions also made the channels more sensitive to reduction in K+o, consistent with coupling between the responses to pHi and K+o. The ion selectivity sequence of the activation of the channel by cations was K+ ≅ Rb+ > NH4+ >> Na+, similar to that for ion permeability, suggesting an interaction with the selectivity filter. We tested a model of coupling in which a pH-sensitive gate can close the pore from the inside, preventing access of K+ from the cytoplasm and increasing sensitivity of the selectivity filter to removal of K+o. We mimicked closure of this gate using positive membrane potentials to elicit block by intracellular cations. With K+o between 10 and 110 mM, this resulted in a slow, reversible decrease in conductance. However, additional channel constructs, in which inward rectification was maintained but the pH sensor was abolished, failed to respond to voltage under the same conditions. This indicates that blocking access of intracellular K+ to the selectivity filter cannot account for coupling. The C13 chimera was 10 times more sensitive to extracellular Ba2+ block than was ROMK2, indicating that changes in the COOH terminus affect ion binding to the outer part of the pore. This effect correlated with the sensitivity to inactivation by H+. We conclude that decreasing pHI increases the sensitivity of ROMK2 channels to K+o by altering the properties of the selectivity filter.

scholarly journals Electrical characteristics of silicon differential photoreceivers

2021 ◽  
Vol 2052 (1) ◽  
pp. 012014
Author(s):  
V V Gavrushko ◽  
A S Ionov ◽  
O R Kadriev ◽  
V A Lastkin
Keyword(s):  
Differential Resistance ◽  
Implantation Dose ◽  
Electrical Characteristics ◽  
Similar Shape ◽  
Voltage Curve ◽  
Current Voltage ◽  
Reverse Branch ◽  
Current Voltage Curve ◽  
Surface Leakage ◽  
Additional Channel

Abstract The volt-ampere curve of silicon differential photodiodes were measured. It was found that the current-voltage curve of the photodiodes of the main and additional channels had a similar shape, without revealing a significant dependence on the implantation dose of the additional channel. The main parameters of the equivalent circuits of photodiodes are determined. In the reverse branch, the dominant impact was exerted by the surface leakage conductivity with a differential resistance of about 10 GΩ. Measurements from minus 60 °C to 60 °C showed that when using amplifiers with an input impedance of about 103 Ω, differential photoreceivers can be successfully used as selective short-wavelength and two-color ones.

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