Results 41 to 50 of about 19,752 (294)

Light‐Induced Entropy for Secure Vision

open access: yesAdvanced Materials, EarlyView.
This work realized a ternary true random number generator by exploiting stochastic traps emerging within multiple junction interfaces, and quantitatively validated the generation of high‐quality random numbers. Furthermore, it successfully demonstrated diverse applications, including AI‐resilient image security, thereby providing a valuable guide for ...
Juhyung Seo   +9 more
wiley   +1 more source

Estimating the joint roughness coefficient of discontinuities found in metamorphic rocks [PDF]

open access: yes, 2008
The paper presents the results of different methods of determining the roughness of joints in quartzites, metagreywackes and phyllites obtained from road cuts in central Portugal.
Andrade, Pedro, Saraiva, António
core   +1 more source

Ratio of Loss and Storage Moduli Determines Restitution Coefficient in Low-Velocity Viscoelastic Impacts [PDF]

open access: yes, 2020
Impact tests are an important tool to analyze dynamic material properties of viscoelastic media in technology and biology. In this context, rigorous contact mechanical models of the collision problem are necessary to adequately interpret data from impact
Willert, Emanuel
core   +1 more source

Collision‐Resilient Winged Drones Enabled by Tensegrity Structures

open access: yesAdvanced Robotics Research, EarlyView.
Based on structures of birds such as the woodpeck, this article presents the collision‐resilient aerial robot, SWIFT. SWIFT leverages tensegrity structures in the fuselage and wings which allow it to undergo large deformations in a crash, without sustaining damage. Experiments show that SWIFT can reduce impact forces by 70% over conventional structures.
Omar Aloui   +5 more
wiley   +1 more source

Determine the Compressive Strength of Calcium Silicate Bricks by Combined Nondestructive Method

open access: yesThe Scientific World Journal, 2014
The paper deals with the application of combined nondestructive method for assessment of compressive strength of calcium silicate bricks. In this case, it is a combination of the rebound hammer method and ultrasonic pulse method.
Jiri Brozovsky
doaj   +1 more source

Investigation of RC-DTH air hammer performance using CFD approach with dynamic mesh method

open access: yesJournal of Advanced Research, 2019
Reverse circulation down-the-hole (RC-DTH) air hammers have been widely used in construction and mining activities owing to their high drilling efficiency and good dust control performance.
Xinxin Zhang   +4 more
doaj   +1 more source

In situ assessment of the stone conservation state by its water absorbing behaviour : a hands-on methodology [PDF]

open access: yes, 2016
This paper describes the use of the water absorbing behaviour (WAB) for assessment of the conservation state of stone in situ. A test methodology, consisting of a combination of techniques for in situ measurement of the WAB, was applied in a case study ...
Cnudde, Veerle   +2 more
core   +1 more source

Durability of Soft Pneumatic Actuators: A Review and Benchmarking Protocol

open access: yesAdvanced Robotics Research, EarlyView.
Lack of durability is a key challenge hindering the broad scale adoption of soft pneumatic actuators (SPAs) in automation industries. This review provides a comprehensive overview of existing research on SPA durability, introduces a standardized durability benchmarking protocol to consolidate the testing of SPAs, and outlines promising directions for ...
Dickson Chiu Yu Wong   +2 more
wiley   +1 more source

Assessment of Concrete Strength Using the Combination of NDT—Review and Performance Analysis

open access: yesApplied Sciences, 2022
This paper presents a review on combining NDT techniques, such as rebound hammer and ultrasonic pulse velocity, for assessing concrete compressive strength.
Bouchra Kouddane   +6 more
doaj   +1 more source

A new technique for non-destructive field measurement of rock-surface strength: an application of the Equotip hardness tester to weathering studies [PDF]

open access: yes, 2007
Tafone-like depressions have developed on the Aoshima sandstone blocks used for a masonry bridge pier in the coastal spray zone. A thin layer of partial granular disintegration was found on the surface in depressions.
Aoki Hisashi   +2 more
core   +1 more source

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