W. Arnold
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View article: Complete CASSE acceleration data measured upon landing of Philae on comet 67P at Agilkia
Complete CASSE acceleration data measured upon landing of Philae on comet 67P at Agilkia Open
On November 12th, 2014, the Rosetta lander Philae touched down at the site Agilkia on comet 67P. Here, we report unpublished data of the Comet Acoustic Surface Sounding Experiment (CASSE) which belonged to the Surface Electric Sounding and…
View article: We've broken the climate: now what?
We've broken the climate: now what? Open
Despite the world missing its global heating targets, and ever more extreme weather events occurring, Will Arnold sees reasons to be optimistic and urges structural engineers to be bold in their climate action.
View article: Nanoscale ultrasonic subsurface imaging with atomic force microscopy
Nanoscale ultrasonic subsurface imaging with atomic force microscopy Open
Imaging of subsurface features down to the nanometer scale is of great importance in various fields such as microelectronics, materials science, nanobiology, and nanomedicine. Since their invention 25 years ago, ultrasonic-based atomic for…
View article: The fractal nature as new frontier in microstructural characterization and relativization of scale sizes within space
The fractal nature as new frontier in microstructural characterization and relativization of scale sizes within space Open
Today in the age of advanced ceramic civilization, there are a variety of applications for modern ceramics materials with specific properties. Our up-to date research recognizes that ceramics have a fractal configuration nature on the basi…
View article: Elastic Moduli of Nanoglasses and Melt-Spun Metallic Glasses by Ultrasonic Time-of-Flight Measurements
Elastic Moduli of Nanoglasses and Melt-Spun Metallic Glasses by Ultrasonic Time-of-Flight Measurements Open
The elastic moduli of the metallic nanoglasses Fe 86 Sc 14, Fe 90 Sc 10 , Cu 58 Zr 42 , and Cu 60 Zr 40 were determined by measuring their longitudinal and shear wave velocities together with their densities. The data were compared to the …
View article: Nonlinear Behavior of Contact Resonance Atomic Force Microscopy Due to Stick-Slip Phenomena
Nonlinear Behavior of Contact Resonance Atomic Force Microscopy Due to Stick-Slip Phenomena Open
Contact-resonance atomic force microscopy (CR-AFM) has emerged as an advanced scanning probe microscopy technique for characterizing materials with lateral resolutions down to 5 nm. In CR-AFM the AFM cantilever may be excited either by an …
View article: Compressive strength and elastic modulus at Agilkia on comet 67P/Churyumov-Gerasimenko derived from the SESAME/CASSE touchdown signals
Compressive strength and elastic modulus at Agilkia on comet 67P/Churyumov-Gerasimenko derived from the SESAME/CASSE touchdown signals Open
We report an analysis of the Comet Acoustic Surface Sounding Experiment (CASSE) acceleration signals at Philae's first touchdown site Agilkia on comet 67P/Churyumov-Gerasimenko. The signals yield the forces in the contact zone foot-sole an…
View article: Linking macroscopic rejuvenation to nano-elastic fluctuations in a metallic glass
Linking macroscopic rejuvenation to nano-elastic fluctuations in a metallic glass Open
Metallic glasses are structurally heterogeneous below a certain length scale. Here we demonstrate how elastic heterogeneities change in response to a macroscopic cyclic, but elastic, loading protocol. Fluctuations in local elastic properti…
View article: Measurement of the Indentation Modulus and the Local Internal Friction in Amorphous SiO2 Using Atomic Force Acoustic Microscopy
Measurement of the Indentation Modulus and the Local Internal Friction in Amorphous SiO2 Using Atomic Force Acoustic Microscopy Open
For the past two decades, atomic force acoustic microscopy (AFAM), an advanced scanning probe microscopy technique, has played a promising role in materials characterization with a good lateral resolution at micro/nano dimensions. AFAM is …