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Full-Text Articles in Physical Sciences and Mathematics
Quantification Of Surface Roughness Of Lava Flows On Mars, Carolina Rodriguez Sanchez-Vahamonde
Quantification Of Surface Roughness Of Lava Flows On Mars, Carolina Rodriguez Sanchez-Vahamonde
Electronic Thesis and Dissertation Repository
Volcanism has played a significant role throughout Mars’ geologic history. Extensive lava flows are widely spread across Mars’ equatorial region, shaping the surface in a very distinct way. In radar images (at the decimeter scale), these flows are bright, which is a typical characteristic of extremely rough, blocky lavas flows seen on Earth. Although the source of the extreme roughness of Martian lava flows is unknown, their surface roughness parameters can be constrained to 1) gain information about Mars’ interior processes, 2) find appropriate analogues on other planetary bodies, and 3) ideally infer the emplacement style of such lavas. Here, …
Indigenous Astronomy As Told By The Haudenosaunee, Sasha Doxtator
Indigenous Astronomy As Told By The Haudenosaunee, Sasha Doxtator
2019 Cohort
Colonization has greatly reduced the extent to which Indigenous astronomy is presently known and shared. Much sky lore has become lost or fragmented, and the connections between stories, night sky observations, and their relevance is not as obvious as it once was. A detrimental spiral has ensued with many Western-trained scientists being reluctant to share sky lore out of fear of being misunderstood, disrespected, and dismissed.
Indigenous Astronomy As Told By The Haudenosaunee, Sasha Doxtator
Indigenous Astronomy As Told By The Haudenosaunee, Sasha Doxtator
Head and Heart Posters 2019
Colonization has greatly reduced the extent to which Indigenous astronomy is presently known and shared. Much sky lore has become lost or fragmented, and the connections between stories, night sky observations, and their relevance is not as obvious as it once was. A detrimental spiral has ensued with many Western-trained scientists being reluctant to share sky lore out of fear of being misunderstood, disrespected, and dismissed.
Indigenous Astronomy As Told By The Haudenosaunee, Sasha Doxtator
Indigenous Astronomy As Told By The Haudenosaunee, Sasha Doxtator
Learning with your Head & Heart
Colonization has greatly reduced the extent to which Indigenous astronomy is presently known and shared. Much sky lore has become lost or fragmented, and the connections between stories, night sky observations, and their relevance is not as obvious as it once was. A detrimental spiral has ensued with many Western-trained scientists being reluctant to share sky lore out of fear of being misunderstood, disrespected, and dismissed.
Stability Of Binary Colloidal Crystals Immersed In A Cholesteric Liquid Crystal, Setarehalsadat Changizrezaei, Colin Denniston
Stability Of Binary Colloidal Crystals Immersed In A Cholesteric Liquid Crystal, Setarehalsadat Changizrezaei, Colin Denniston
Physics and Astronomy Publications
In this paper, we model a number of both closed-packed and non-closed-packed crystals inside a cholesteric liquid crystal (LC) with different pitch values and nematic LC through the Landau–de Gennes free-energy method. We used binary boundary conditions (normal and planar anchoring) applied on the surface of colloids as we are interested in investigating the stability of binary crystals. The results indicate that body-centered-cubic (BCC) crystals have a lower-energy lattice defect structure than the diamond crystal, and the most energetically favorable BCC lattice can be formed in a cholesteric liquid crystal with a pitch value commensurate with the lattice spacing. Furthermore, …
An Analytic Study Of The Wiedemann-Franz Law And The Thermoelectric Figure Of Merit, Aakash Yadav, Pc Deshmukh, Ken Roberts, Nm Jisrawi, Sree Ram Valluri
An Analytic Study Of The Wiedemann-Franz Law And The Thermoelectric Figure Of Merit, Aakash Yadav, Pc Deshmukh, Ken Roberts, Nm Jisrawi, Sree Ram Valluri
Physics and Astronomy Publications
Advances in optimizing thermoelectric material efficiency have seen a parallel activity in theoretical and computational advances. In the current work, it is shown that the calculation of exact Fermi-Dirac integrals enables the generalization of the Wiedemann-Franz law (WF) to optimize the dimensionless thermoelectric figure of merit ZT. This is done by optimizing the Seebeck coefficient, the electrical conductivity and the thermal conductivity. In the calculation of the thermal conductivity, both electronic and phononic contributions are included. The solutions provide insight into the relevant parameter space including the physical significance of complex solutions and their dependence on the scattering parameter r …
Simulations Of Microscopic Propulsion Of Soft Elastic Bodies, David Urbanik, Shikhar Man Dwivedi, Colin Denniston
Simulations Of Microscopic Propulsion Of Soft Elastic Bodies, David Urbanik, Shikhar Man Dwivedi, Colin Denniston
Physics and Astronomy Publications
Using simulations that realistically model both hydrodynamic and elastic behavior, we study the motion of a microscopic, driven elastic sphere immersed in water. We first confirm the “jittery” relaxation recently predicted theoretically for an externally driven elastic sphere. The sphere is then divided in two and each section is driven internally with the two sections 180° out of phase. With periodic and perfectly symmetric driving, the elastic sphere spontaneously breaks symmetry and can attain macroscopic average swimming velocities to the right or left, the direction depending only on the initial state. With asymmetric driving the elastic sphere swims in one …