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Full-Text Articles in Physics

How Does The Connectivity Of Open-Framework Conglomerates Within Multi-Scale Hierarchical Fluvial Architecture Affect Oil-Sweep Efficiency In Waterflooding?, Naum I. Gershenzon, Mohamad Reza Soltanian, Robert W. Ritzi, David F. Dominic, Don Keefer, Eric Shaffer, Brynne Storsved Dec 2015

How Does The Connectivity Of Open-Framework Conglomerates Within Multi-Scale Hierarchical Fluvial Architecture Affect Oil-Sweep Efficiency In Waterflooding?, Naum I. Gershenzon, Mohamad Reza Soltanian, Robert W. Ritzi, David F. Dominic, Don Keefer, Eric Shaffer, Brynne Storsved

Physics Faculty Publications

Understanding multi-phase fluid flow and transport processes within aquifers, candidate reservoirs for CO2 sequestration, and petroleum reservoirs requires understanding a diverse set of geologic properties of the aquifer or reservoir, over a wide range of spatial and temporal scales. We focus on multiphase flow dynamics with wetting (e.g., water) and non-wetting (e.g., gas or oil) fluids, with one invading another.


Enriching Gender In Per: A Binary Past And A Complex Future, Adrienne L. Traxler, Ximena C. Cid, Jennifer Blue, Ramón Barthelemy Jul 2015

Enriching Gender In Per: A Binary Past And A Complex Future, Adrienne L. Traxler, Ximena C. Cid, Jennifer Blue, Ramón Barthelemy

Physics Faculty Publications

In this article, we draw on previous reports from physics, science education, and women's studies to propose a more nuanced treatment of gender in physics education research (PER). A growing body of PER examines gender differences in participation, performance, and attitudes toward physics. We have three critiques of this work: (1) it does not question whether the achievements of men are the most appropriate standard, (2) individual experiences and student identities are undervalued, and (3) the binary model of gender is not questioned. Driven by these critiques, we propose a conception of gender that is more up-to-date with other ...


Community Structure In Introductory Physics Course Networks, Adrienne L. Traxler Jul 2015

Community Structure In Introductory Physics Course Networks, Adrienne L. Traxler

Physics Faculty Publications

Student-to-student interactions are foundational to many active learning environments, but are most often studied using qualitative methods. Quantitative network analysis tools complement this picture, allowing researchers to describe the social interactions of whole classrooms as systems. Past results in introductory physics have suggested a sharp division in the formation of social structure between large lecture sections and small studio classroom environments. Extending those results, this study focuses on calculus-based introductory physics courses at a large public university with a heavily commuter and nontraditional student population. Community detection network methods are used to characterize pre- and post-course collaborative structure in several ...


How Does Dissipation Affect The Transition From Static To Dynamic Macroscopic Friction?, Naum I. Gershenzon, Gust Bambakidis, Thomas E. Skinner Apr 2015

How Does Dissipation Affect The Transition From Static To Dynamic Macroscopic Friction?, Naum I. Gershenzon, Gust Bambakidis, Thomas E. Skinner

Physics Faculty Publications

Description of the transitional process from a static to a dynamic frictional regime is a fundamental problem of modern physics. Previously, we developed a model based on the well-known Frenkel-Kontorova model to describe dry macroscopic friction. Here, this model has been modified to include the effect of dissipation in derived relations between the kinematic and dynamic parameters of a transition process. The main (somewhat counterintuitive) result is a demonstration that the rupture (i.e., detachment front) velocity of the slip pulse which arises during the transition does not depend on friction. The only parameter (besides the elastic and plastic properties ...


Understanding The Impact Of Open-Framework Conglomerates On Water-Oil Displacements: Victor Interval Of The Ivishak Reservoir, Prudhoe Bay Field, Alaska, Naum I. Gershenzon, Mohamadreza Soltanian, Robert W. Ritzi, David F. Dominic Feb 2015

Understanding The Impact Of Open-Framework Conglomerates On Water-Oil Displacements: Victor Interval Of The Ivishak Reservoir, Prudhoe Bay Field, Alaska, Naum I. Gershenzon, Mohamadreza Soltanian, Robert W. Ritzi, David F. Dominic

Physics Faculty Publications

The Victor Unit of the Ivishak Formation in the Prudhoe Bay Oilfield is characterized by high net-to-gross fluvial sandstones and conglomerates. The highest permeability is found within sets of cross-strata of open-framework conglomerate (OFC). These cross-strata are preserved within unit-bar deposits and assemblages of unit-bar deposits within compound (braid)-bar deposits, and may form thief zones limiting enhanced oil recovery. We incorporate recent research that has quantified important attributes of preserved sedimentary architecture into high-resolution models. Waterflooding experiments using these models demonstrate the control that such architecture has on oil production rate, water breakthrough time, and spatial and temporal distribution ...


Scaling Of Geochemical Reaction Rates Via Advective Solute Transport, Allen Hunt, B. Ghanbarian-Alavijeh, Thomas E. Skinner, R. P. Ewing Jan 2015

Scaling Of Geochemical Reaction Rates Via Advective Solute Transport, Allen Hunt, B. Ghanbarian-Alavijeh, Thomas E. Skinner, R. P. Ewing

Physics Faculty Publications

Transport in porous media is quite complex, and still yields occasional surprises. In geological porous media, the rate at which chemical reactions (e.g., weathering and dissolution) occur is found to diminish by orders of magnitude with increasing time or distance. The temporal rates of laboratory experiments and field observations differ, and extrapolating from laboratory experiments (in months) to field rates (in millions of years) can lead to order-of-magnitude errors. The reactions are transport-limited, but characterizing them using standard solute transport expressions can yield results in agreement with experiment only if spurious assumptions and parameters are introduced. We previously developed ...


Highly Transparent Conductive Electrode With Ultra-Low Haze By Grain Boundary Modification Of Aqueous Solution Fabricated Alumina-Doped Zinc Oxide Nanocrystals, Qiong Nian, Michael J. Callahan, David C. Look, Harry Efstathiadis, John Bailey, Gary J. Cheng Jan 2015

Highly Transparent Conductive Electrode With Ultra-Low Haze By Grain Boundary Modification Of Aqueous Solution Fabricated Alumina-Doped Zinc Oxide Nanocrystals, Qiong Nian, Michael J. Callahan, David C. Look, Harry Efstathiadis, John Bailey, Gary J. Cheng

Physics Faculty Publications

Commercial production of transparent conducting oxide (TCO) polycrystalline films requires high electrical conductivity with minimal degradation in optical transparency. Aqueous solution deposited TCO films would reduce production costs of TCO films but suffer from low electrical mobility, which severely degrades both electrical conductivity and optical transparency in the visible spectrum. Here, we demonstrated that grain boundary modification by ultra-violet laser crystallization (UVLC) of solution deposited aluminium-doped zinc oxide (AZO) nanocrystals results in high Hall mobility, with a corresponding dramatic improvement in AZO electrical conductance. The AZO films after laser irradiation exhibit electrical mobility up to 18.1 cm2 V ...


Investigation Of Plasmon Resonance Tunneling Through Subwavelength Hole Arrays In Highly Doped Conductive Zno Films, Nima Nader, Shivashankar Vangala, Joseph R. Hendrickson, Kevin D. Leedy, David C. Look, Junpeng Guo, Justin W. Cleary Jan 2015

Investigation Of Plasmon Resonance Tunneling Through Subwavelength Hole Arrays In Highly Doped Conductive Zno Films, Nima Nader, Shivashankar Vangala, Joseph R. Hendrickson, Kevin D. Leedy, David C. Look, Junpeng Guo, Justin W. Cleary

Physics Faculty Publications

Experimental results pertaining to plasmon resonance tunneling through a highly conductive zinc oxide (ZnO) layer with subwavelength hole-arrays is investigated in the mid-infrared regime. Gallium-doped ZnO layers are pulsed-laser deposited on a silicon wafer. The ZnO has metallic optical properties with a bulk plasma frequency of 214 THz, which is equivalent to a free space wavelength of 1.4 μm. Hole arrays with different periods and hole shapes are fabricated via a standard photolithography process. Resonant mode tunneling characteristics are experimentally studied for different incident angles and compared with surface plasmontheoretical calculations and finite-difference time-domain simulations. Transmission peaks, higher than ...


Large Scale Laser Crystallization Of Solution-Based Alumina-Doped Zinc Oxide (Azo) Nanoinks For Highly Transparent Conductive Electrode, Qiong Nian, Michael J. Callahan, Mojib Saei, David C. Look, Harry Efstathiadis, John Bailey, Gary J. Cheng Jan 2015

Large Scale Laser Crystallization Of Solution-Based Alumina-Doped Zinc Oxide (Azo) Nanoinks For Highly Transparent Conductive Electrode, Qiong Nian, Michael J. Callahan, Mojib Saei, David C. Look, Harry Efstathiadis, John Bailey, Gary J. Cheng

Physics Faculty Publications

A new method combining aqueous solution printing with UV Laser crystallization (UVLC) and post annealing is developed to deposit highly transparent and conductive Aluminum doped Zinc Oxide (AZO) films. This technique is able to rapidly produce large area AZO films with better structural and optoelectronic properties than most high vacuum deposition, suggesting a potential large-scale manufacturing technique. The optoelectronic performance improvement attributes to UVLC and forming gas annealing (FMG) induced grain boundary density decrease and electron traps passivation at grain boundaries. The physical model and computational simulation developed in this work could be applied to thermal treatment of many other ...


Equity Investigation Of Attitudinal Shifts In Introductory Physics, Adrienne L. Traxler, Eric Brewe Jan 2015

Equity Investigation Of Attitudinal Shifts In Introductory Physics, Adrienne L. Traxler, Eric Brewe

Physics Faculty Publications

We report on seven years of attitudinal data using the Colorado Learning Attitudes about Science Survey from University Modeling Instruction (UMI) sections of introductory physics at Florida International University. University Modeling Instruction is a curricular and pedagogical transformation of introductory university physics that engages students in building and testing conceptual models in an integrated lab and lecture learning environment. This work expands upon previous studies that reported consistently positive attitude shifts in UMI courses; here, we disaggregate the data by gender and ethnicity to look for any disparities in the pattern of favorable shifts. We find that women and students ...