Open Access. Powered by Scholars. Published by Universities.®
- Discipline
Articles 1 - 2 of 2
Full-Text Articles in Entire DC Network
Musical Acoustics Of Orchestral Water Crotales, Rand Worland
Musical Acoustics Of Orchestral Water Crotales, Rand Worland
All Faculty Scholarship
An experimental investigation of orchestral crotale vibrational modes in water is presented, along with a qualitative virtual mass model describing the observed effects. Changes in frequency, overtone ratio, and mode splitting as a function of water depth are reported for a C6 crotale using electronic speckle-pattern interferometry. These data are related to perceived changes in pitch and timbre, along with the creation of audible beats at particular water depths. It is also shown that the suspension method used by musicians when dipping crotales into water leads to the creation of additional acoustically significant modes that are not excited when …
Scanning Electron Microscopy And Molecular Dynamics Of Surfaces Of Growing And Ablating Hexagonal Ice Crystals, Steven Neshyba, Pavel Jungwirth, Martina Roeselova, Erin Nugent
Scanning Electron Microscopy And Molecular Dynamics Of Surfaces Of Growing And Ablating Hexagonal Ice Crystals, Steven Neshyba, Pavel Jungwirth, Martina Roeselova, Erin Nugent
All Faculty Scholarship
We present the first clearly resolved observations of surfaces of growing and ablating hexagonal ice crystals using variable-pressure scanning electron microscopy. The ice surface develops trans-prismatic strands, separated from one another by distances of 5–10 ?m. The strands are present at a wide range of supersaturations, but are most pronounced at temperatures near the frost point. Pyramidal facets consistent with Miller-Bravais indices of 1011, and possibly also 2021, are associated with ice growth under these conditions. A molecular-dynamics model of a free-standing ice Ih nanocolumn containing 8400 water molecules does not develop trans-prismatic strands, suggesting these features originate at …