8 Works

Liberation through Cooperation: How Library Publishing Can Save Scholarly Journals from Neoliberalism

Dave Ghamandi
This commentary examines political and economic aspects of open access (OA) and scholarly journal publishing. Through a discourse of critique, neoliberalism is analyzed as an ideology causing many problems in the scholarly journal publishing industry, including the serials crisis. Two major efforts in the open access movement that promote an increase in OA funded by article-processing charges (APC) —the Open Access 2020 (OA2020) and Pay It Forward (PIF) initiatives—are critiqued as neoliberal frameworks that would...

Design rules for interfacial thermal conductance: Building better bridges

Carlos A. Polanco, Rouzbeh Rastgarkafshgarkolaei, Jingjie Zhang, Nam Q. Le, Pamela Norris & Avik Ghosh
We study the thermal conductance across solid-solid interfaces as the composition of an intermediate matching layer is varied. In the absence of phonon-phonon interactions, an added layer can make the interfacial conductance increase or decrease depending on the interplay between (1) an increase in phonon transmission due to better bridging between the contacts and (2) a decrease in the number of available conduction channels that must conserve their momenta transverse to the interface. When phonon-phonon...

Phonon-mediated thermal transport at exponentially mass-graded interfaces: A computational study

Rouzbeh Rastgarkafshgarkolaei, Jinjie Zhang, Carlos A. Polanco, Nam Q. Le, Avik Ghosh & Pamela Norris
We numerically investigate thermal transport at solid-solid interfaces with graded intermediate layers whose masses vary exponentially from one side to the other. Using Non-Equilibrium Green's Function and Non-Equilibrium Molecular Dynamics simulations, we show that an exponentially mass-graded junction with a finite thickness can result in 68% of enhancement in thermal conductance larger compared to a single bridging layer (29%) and a linear mass-graded junction (64%) of similar thickness. We examine how the thermal conductance at...

Zeev Porath Chronicled Nazi Rapists And Other Atrocities - In His Drawings

Waitman Beorn
Describes how one concentration camp survivor witnessed sexual violence and documented it in his drawings during the Holocaust.

Effects of bulk and interfacial anharmonicity on thermal conductance at solid/solid interfaces

Nam Q. Le, Carlos A. Polanco, Rouzbeh Rastgarkafshgarkolaei, Jinjie Zhang, Avik Ghosh & Pamela M. Norris
We present the results of classical molecular dynamics simulations to assess the relative contributions to interfacial thermal conductance from inelastic phonon processes at the interface and in the adjacent bulk materials. The simulated system is the prototypical interface between argon and “heavy argon” crystals, which enables comparison with many past computational studies. We run simulations interchanging the Lennard-Jones potential with its harmonic approximation to test the effect of anharmonicity on conductance. The results confirm that...

Epic Theory

Herbert Tucker
Among major literary kinds, epic offers the most long-standing and globally distributed evidence of the human habit of thinking by means of narrative. What it cherishes is the common good; what it ponders are the behaviors and values that forward or threaten collective welfare. What it reckons are the stakes of heroic risk that any living culture must hazard in order to prosper, by negotiating core identities with margins and adjusting settled customs to emergent...

The User Experience: Focus Group Insights

Melinda Baumann
The author discusses the results of three focus groups she facilitated about Maker spaces in April 2017 for the University of Virginia Library. All focus group participants valued inclusivity, expressing strong opinions that a Maker space should be "open to all" and should have an accessible layout.

Role of crystal structure and junction morphology on interface thermal conductance

Carlos A. Polanco, Rouzbeh Rastgarkafshgarkolaei, Jingjie Zhang, Nam Q. Le, Pamela Norris, Patrick Hopkins & Avik Ghosh
We argue that the relative thermal conductance between interfaces with different morphologies is controlled by crystal structure through Mmin/Mc > 1, the ratio between the minimum mode count on either side Mmin, and the conserving modes Mc that preserve phonon momentum transverse to the interface. Junctions with an added homogenous layer, “uniform,” and “abrupt” junctions are limited to Mc, while junctions with interfacial disorder, “mixed,” exploit the expansion of mode spectrum to Mmin. In our...

Registration Year

  • 2018
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Resource Types

  • Journal Article
    8

Affiliations

  • University of Virginia
    8