Results 31 to 40 of about 7,526,383 (337)

Cosmic Strings Collision in Cosmological Backgrounds [PDF]

open access: yes, 2010
The collisions of cosmic strings loops and the dynamics of junctions formations in expanding backgrounds are studied. The key parameter controlling the dynamics of junctions formation, the cosmic strings zipping and unzipping is the relative size of the ...
Firouzjahi, Hassan   +2 more
core   +1 more source

Estimating the size of key populations at higher risk of HIV infection: a summary of experiences and lessons presented during a technical meeting on size estimation among key populations in Asian countries

open access: yesWestern Pacific Surveillance and Response, 2014
Problem: Size estimates of key populations at higher risk of HIV exposure are recognized as critical for understanding the trajectory of the HIV epidemic and planning and monitoring an effective response, especially for countries with concentrated and ...
Dongbao Yu   +4 more
doaj   +1 more source

Key distillation from Gaussian states by Gaussian operations [PDF]

open access: yes, 2004
We study the secrecy properties of Gaussian states under Gaussian operations. Although such operations are useless for quantum distillation, we prove that it is possible to distill a secret key secure against any attack from sufficiently entangled ...
Acín, Antonio   +6 more
core   +3 more sources

A Review of Block Ciphers and Its Post-Quantum Considerations

open access: yesIEEE Access
Recent advances in cryptography aim to address threats posed by quantum computers. However, these advances have focused disproportionately on asymmetric schemes, while symmetric primitives like block ciphers have received less attention.
R. V. Chethana   +3 more
doaj   +1 more source

Influence of size and shape on key performance metrics in spin-torque oscillators

open access: yesAIP Advances, 2021
Spin Torque Oscillators (STOs) are promising solutions in a wide variety of next generation technologies from read-head sensors in high-density magnetic recording technology to neural oscillator units for neuromorphic computing. There are several metrics
Brandon R. Zink, Yang Lv, Jian-Ping Wang
doaj   +1 more source

Finite-size analysis of continuous-variable measurement-device-independent quantum key distribution

open access: yes, 2017
We study the impact of the finite-size effect on the continuous-variable measurement-device-independent quantum key distribution (CV-MDI QKD) protocol, mainly considering the finite-size effect on the parameter estimation procedure.
Guo, Hong   +5 more
core   +2 more sources

Estimating the size of key populations [PDF]

open access: yesCurrent Opinion in HIV and AIDS, 2014
Estimation of key population sizes is essential for advocacy, program planning, and monitoring of HIV epidemics in these populations. A review of recent publications on population size estimation among key populations including MSM, people who inject drugs, and male and female sex workers was conducted to identify and assess current practices at the ...
Wolfgang Hladik   +2 more
openaire   +3 more sources

Defects in the grain interiors of 3 mol% yttria-stabilized tetragonal zirconia polycrystal ceramics with 0.25 wt% alumina

open access: yesJournal of Advanced Ceramics
The presence of high-density defects is rarely observed in bulk 3 mol% yttria-stabilized tetragonal zirconia polycrystal (3Y-TZP) ceramics obtained through conventional pressureless sintering.
Yan Xiong   +6 more
doaj   +1 more source

Root hemiparasitism in Malania oleifera (Olacaceae), a neglected aspect in research of the highly valued tree species

open access: yesPlant Diversity, 2019
Malania oleifera (Olacaceae) is a valued tree species, mostly because its seeds have high precious fatty acid content (particularly nervonic acid). However, seedling mortality rates are often high and regeneration of this tree has been problematic, which
Ai-Rong Li, Ping Mao, Yun-Ju Li
doaj   +1 more source

Finite-size security of continuous-variable quantum key distribution with digital signal processing

open access: yesNature Communications, 2021
While continuous-variable QKD presents many experimental advantages, a full security proof that addresses the most general attacks and digitized signals in the finite-size regime has so far been lacking.
Takaya Matsuura   +3 more
doaj   +1 more source

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