Results 101 to 110 of about 167,450,079 (281)

A Single‐Solvent Acetone Strategy for Surface Enhancement and Robust Bonding in PMMA Microfluidic Devices

open access: yesAdvanced Materials Interfaces, EarlyView.
A single‐solvent acetone strategy simultaneously restores laser‐ablated PMMA surfaces and enables high‐strength bonding for microfluidic device fabrication. The process produces smooth, optically clear channels, achieves bonding strengths up to 27.3 MPa, and forms leak‐free devices within 25 min, providing a rapid and accessible route to robust PMMA ...
Sadık Koç, H. Cumhur Tekin
wiley   +1 more source

Comparison of decentralized proof of work and proof of stake algorithms

open access: yes, 2022
Postoje razni modeli organizacije blokchaina-a. U radu se analiziraju decentralizirani modeli organizacije blokchain-a Proof of Work i Proof of Stake. Analiza se temeljila na tri parametra, a to su: sigurnost, nagrada i energetska učinkovitost.
Rafajac, Ozren   +2 more
core  

MEC-Chain: Towards a New Framework for a MEC-Enabled Mobile Blockchain Network Under the PoS Consensus

open access: yesFuture Internet
The Proof of Stake (PoS) consensus mechanism is increasingly used in blockchain systems; however, resource allocation for PoS-based mobile blockchain networks remains underexplored, particularly given the constraints of mobile devices.
Rima Grati   +2 more
doaj   +1 more source

Advanced MXene‐Based Multifunctional Nanoarchitecture Materials Engineered for Adsorptive Cleanup of Hazardous Radioactive Pollutants: A Comprehensive Critical Review

open access: yesAdvanced Materials Interfaces, EarlyView.
This work critically reviews MXenes as highly effective multifunctional nanomaterials for the adsorption of radio‐contaminants, demonstrating a remarkable adsorption capacity of up to 1376.75 mg/g and cyclic stability of 2–8 cycles, with complexation, electrostatic interactions, and the numerical strength of MXene active sites playing a key operational
Stephen Sunday Emmanuel   +1 more
wiley   +1 more source

Ouroboros Crypsinous: Privacy-Preserving Proof-of-Stake [PDF]

open access: yes, 2019
We present Ouroboros Crypsinous, the first formally analyzed privacy-preserving proof-of-stake blockchain protocol. To model its security we give a thorough treatment of private ledgers in the (G)UC setting that might be of independent interest. To prove
Markulf Kohlweiss   +7 more
core   +1 more source

From the Discovery of the Giant Magnetocaloric Effect to the Development of High‐Power‐Density Systems

open access: yesAdvanced Materials Technologies, EarlyView.
The article overviews past and current efforts on caloric materials and systems, highlighting the contributions of Ames National Laboratory to the field. Solid‐state caloric heat pumping is an innovative method that can be implemented in a wide range of cooling and heating applications.
Agata Czernuszewicz   +5 more
wiley   +1 more source

51% attack vulnerability of nascent blockchains: a comprehensive review

open access: yesComplex & Intelligent Systems
Nascent blockchains—networks in their formative stages (0–3 years post-launch) with limited network participation and market capitalisation below $100 million—face disproportionate vulnerability to consensus-level attacks.
Buti Sello, Jianming Yong, Xiaohui Tao
doaj   +1 more source

Proof of Stake Blockchain

open access: yesProceedings of the 9th International Conference on Management of Digital EcoSystems, 2017
A blockchain is a distributed transaction ledger, a disruptive technology that creates new possibilities for digital ecosystems. The blockchain ecosystem maintains an immutable transaction record to support many types of digital services. This paper compares the performance and scalability of a web-based groupware communication application using both ...
Jason Spasovski, Peter W. Eklund
openaire   +2 more sources

Hydro‐ and Lipophilicity of Molecular‐Size‐Controlled Hydrogel Drug Carriers

open access: yesAdvanced Materials Technologies, EarlyView.
We investigate nano‐sized hydrogel drug carriers with tailored hydro‐ and lipophilicity. We design their encapsulation and structure‐forming capabilities and follow them in real time during fabrication using time‐resolved and in situ grazing incidence x‐ray scattering.
Elisabeth Erbes   +21 more
wiley   +1 more source

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