Results 91 to 100 of about 59,816 (292)

Beyond bathymetry: Mapping acoustic backscattering from the deep seafloor with Sea Beam [PDF]

, 1986
In its standard mode of operation, the multibeam echosounder Sea Beam produces high resolution bathymetric contour charts of the seafloor surveyed. However, additional information about the nature of the seafloor can be extracted from the structure of ...
de Moustier, Christian
core   +2 more sources

Estimating the three-dimensional joint roughness coefficient value of rock fractures

Bulletin of Engineering Geology and the Environment, 2017
Measurement and estimation of the joint roughness coefficient (JRC) is a critical but also difficult challenge in the field of rock mechanics. Parameters for estimating JRC based on a profile derived from a fracture surface are generally two-dimensional (2D), where a single or multiple straight profiles derived from a surface cannot reflect the ...
Ping Mo, Yanrong Li
openaire   +1 more source

All‐Optical Reconfigurable Physical Unclonable Function for Sustainable Security

Advanced Materials, EarlyView.
An all‐optical reconfigurable physical unclonable function (PUF) is demonstrated using plasmonic coupling–induced sintering of optically trapped gold nanoparticles, where Brownian motion serves as a robust entropy source. The resulting optical PUF exhibits high encoding density, strong resistance to modeling attacks, and practical authentication ...
Jang‐Kyun Kwak, Changgyun Moon, Hyun‐Bin Yu, Sunkook Kim, Dong‐Hwan Kim   +4 more
wiley   +1 more source

Revisiting scale effect on joint roughness coefficient and shear strength considering sampling methods and geometric characteristics

Journal of Rock Mechanics and Geotechnical Engineering
The scale effect on shear strength of rock joints is well-documented. However, whether scale effects are negative, positive, or even exist or not is still controversial. Joint roughness significantly influences the shear strength of rock joints. Compared
Qing Lü, Xueheng Cai, Luxiang Wu, Jun Zheng, Bo Li   +4 more
doaj   +1 more source

Contact Model of Revolute Joint with Clearance Based on Fractal Theory

Chinese Journal of Mechanical Engineering, 2018
The contact stiffness of a mechanical bonding surface is an important parameter in determining the normal and radial contact force. To improve the calculation accuracy of the contact force model, the surface roughness of the bonding surface and the ...
Shi-Hua Li, Xue-Yan Han, Jun-Qi Wang, Jing Sun, Fu-Juan Li   +4 more
doaj   +1 more source

Study of interfacial stiffness ratio of a rough surface in contact using a spring model [PDF]

, 2010
This study proposes the use of a simple spring model that relates the interfacial stiffness with the complex reflection coefficient of ultrasound in a rough contact.
A. Baltazar, Arakawa, Baltazar, Berthoud, Bush, Drinkwater, Dwyer-Joyce, Dwyer-Joyce, Gonzalez-Valadez, Greenwood, Hisakado, Johnson, Kendall, Kim, Krautkramer, Krolikowski, Krolikowski, M. Gonzalez-Valadez, Marshall, McCool, Mindlin, Nagy, Nayak, Onions, O’Connor, R.S. Dwyer-Joyce, Raoof, Schoenberg, Sevostianov, Sevostianov, Sherif, Tabor, Tattersall, Whitehouse, Yalda-Mooshabad, Yamada, Yoshioka   +36 more
core   +1 more source

AI–Guided 4D Printing of Carnivorous Plants–Inspired Microneedles for Accelerated Wound Healing

Advanced Materials, EarlyView.
This work presents an artificial intelligence (AI)‐guided 4D‐printed microneedle platform inspired by carnivorous plants for wound healing. A thermo‐responsive shape memory polymer enables body temperature–triggered self‐coiling for autonomous wound closure.
Hyun Lee, Moon‐Jo Kim, DongEung Kim, Chan Ho Moon, Seojoon Bang, Hyeong Seok Kang, Ju Yeong Gwon, Jong Hwa Seo, Junhyub Jeon, Junhyuk Son, Munwon Lim, Minho Kang, Dong Yun Lee, Donghyun Lim, Jung‐Hoon Park, Gi Doo Cha, Soo‐Hong Lee, Tae‐Sik Jang, Kisuk Yang, Yunho Jeong, Youngho Eom, Hyun‐Do Jung   +21 more
wiley   +1 more source

Using rodogram function to characterize hurst coefficient in rock profiles

REM: International Engineering Journal
Roughness is a fundamental feature to define rock deformability and resistance. A detailed characterization of discontinuity surface geometry is essential for understanding some of the rock’s mechanical behaviors.
David Alvarenga Drumond, Cláudio Lúcio Lopes Pinto   +1 more
doaj   +1 more source

Two-Scale Kirchhoff Theory: Comparison of Experimental Observations With Theoretical Prediction

, 2005
We introduce a non-perturbative two scale Kirchhoff theory, in the context of light scattering by a rough surface. This is a two scale theory which considers the roughness both in the wavelength scale (small scale) and in the scales much larger than the ...
A Iraji zad, Bass F G, Bruce N C, Calvo-Perez O, Dimenna R A, Elfouhaily T, Fuks I M, G R Jafari, Gu Z H, Ishimaru A, M Reza Rahimi Tabar, N Taghavinia, Nieto-Vesperinas M, Ogilvy J A, P Kaghazchi, R S Dariani, S M Mahdavi, Soubret A Berginc G, Soubret A Berginc G, Tang K, Vornovich A G, Voronovich A G   +21 more
core   +1 more source

Force Distributions in Frictional Granular Media [PDF]

, 2018
We report a joint experimental and theoretical investigation of the probability distribution functions (pdf's) of the normal and tangential (frictional) forces in amorphous frictional media.
Akella, V. S., Bandi, M. M., Hentschel, H. George E., Procaccia, Itamar, Roy, Saikat   +4 more
core   +3 more sources