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Pollution And Polluter Pays, Aaron Lercher Jan 2020

Pollution And Polluter Pays, Aaron Lercher

Faculty Publications

No abstract provided.

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Operational Planning Of Supply Chains In A Production And Distribution Center With Just-In-Time Delivery, Pablo Biswas, Bhaba Sarker Jan 2020

Operational Planning Of Supply Chains In A Production And Distribution Center With Just-In-Time Delivery, Pablo Biswas, Bhaba Sarker

Faculty Publications

Purpose: A supply chain consists of raw material suppliers, manufacturers and retailers where inventory of raw materials and finished goods are involved, respectively. Therefore, it is important to find optimal solutions, which are beneficial for both supplier, manufacturer and retailer.

Design/methodology/approach: This research focuses on a semi-continuous manufacturing facility by assuming that the production of succeeding cycle starts immediately after the production of preceding cycle. In reality, the inventory of a supply chain system may not be completely empty. A number of products may be left over after the deliveries are made. These leftover inventories are added to the next …

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Deductible Choice In Flood Insurance: Who Chooses The Maximum?, Timothy Dombrowski, R. Kelley Pace, Dimuthu Ratnadiwakara, V. Carlos Slawson, Jan 2020

Deductible Choice In Flood Insurance: Who Chooses The Maximum?, Timothy Dombrowski, R. Kelley Pace, Dimuthu Ratnadiwakara, V. Carlos Slawson,

Faculty Publications

Although some have proposed eliminating the National Flood Insurance Program (NFIP) to reduce government expenditures, other alternatives exist that could reduce the cost of the program and increase its viability, such as increasing deductibles, which may increase participation and revenue. The recently released FIMA NFIP Redacted Policies Data Set provides unprecedented opportunities to examine homeowner deductible choices for flood insurance policies using policy-level data. The menu of deductibles currently ranges from $1,000 to $10,000 in Special Flood Hazard Areas (SFHAs), but until April 1, 2015, the maximum deductible was $5,000. Using a matched sample of 252,280 SFHA policies that were …

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A Short History Of Pandemic Coverage On The Internet: Sars, H1n1 And Mers, Will Mari Jan 2020

A Short History Of Pandemic Coverage On The Internet: Sars, H1n1 And Mers, Will Mari

Faculty Publications

This short history of previous online pandemic news coverage (of SARS, H1N1, MERS, c. 2003–2012) draws on Pew Research Center data and then-contemporary primary sources, including meta-journalistic analysis, to explore continuities and divergences to the present and our ongoing coranavirus pandemic. Numerous trends, including a cycle of neglect and panic, emerged on the Internet in the 2000s, and have become exacerbated over time. Other, more positive trends, such as more interactive and helpfully mediated/curated access to health experts, have also emerged. This study provides important context for our current moment.

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Effects Of Partisan Personalization In A News Portal Experiment, Kirill Bryanov, Brian K. Watson, Raymond J. Pingree, Martina Santia Jan 2020

Effects Of Partisan Personalization In A News Portal Experiment, Kirill Bryanov, Brian K. Watson, Raymond J. Pingree, Martina Santia

Faculty Publications

What happens when news aggregators tailor their newsfeeds to include partisan news aimed at users with a known party preference? Relying on a custom-made news portal featuring real, timely articles, this study examines the influence of partisan news sources on participant headline exposure, clicks on news stories to read, and perceptions about the portal’s ability to reliably and comprehensively provide the most important news of the day. Over a period of 12 days, participants preferring either the Republican or Democratic party were randomly assigned to newsfeeds containing increased dosages of real news articles from sources supportive of the participant’s preferred …

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Functionalization Of Cellulose And Chitosan In Ionic Liquids, Cristina Stefanescu, William H. Daly, Ioan I. Negulescu Jan 2020

Functionalization Of Cellulose And Chitosan In Ionic Liquids, Cristina Stefanescu, William H. Daly, Ioan I. Negulescu

Faculty Publications

Chemistry of cellulose in ionic liquids has been briefly reviewed and, accordingly, the phthalation of chitosan in these ionic solvents has been investigated. Chitosan (K) has been reacted at 100 °C for 4 hours with phthalic anhydride (PA) in ionic liquids 1-butyl-3-methylimidazolium acetate (BMIMAc) and 1-butyl-3-methylimidazolium chloride (BMIMCl) in the presence of bases, pyridine and 1,4-diazobicyclo[2.2.2] octane (DABCO), or the phthalation has been catalyzed by N-bromosuccinimide (NBS). Depending on the nature of the reaction components, the samples were prepared with molar ratios of PA to anhydroglucose unit (PA:K) from 3:1 to 10:1, including molar ratios of bases or catalyst to …

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Asian Summer Monsoon Influence On Chemical Weathering And Sediment Provenance Determined By Clay Mineral Analysis From The Indus Submarine Canyon, Yuting Li, Peter D. Clift, Richard W. Murray, Elise Exnicios, Thomas Ireland, Philipp Böning Jan 2020

Asian Summer Monsoon Influence On Chemical Weathering And Sediment Provenance Determined By Clay Mineral Analysis From The Indus Submarine Canyon, Yuting Li, Peter D. Clift, Richard W. Murray, Elise Exnicios, Thomas Ireland, Philipp Böning

Faculty Publications

© Copyright University of Washington. Published by Cambridge University Press, 2019. Clay minerals from the Indus Canyon and eastern clinoform since ∼12 ka are uniformly rich in smectite and illite, similar to those from the Holocene Indus flood plains. A systematic enrichment of smectite in the proximal delta compared to the canyon and eastern clinoform argues for preferential capture of smectite close to the river mouth since ∼12 ka. There is a rapid shift to a more smectite-rich assemblage in the canyon and eastern clinoform after ∼5 ka. This change is probably caused by a change in sediment source, with …

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Slowing Rates Of Regional Exhumation In The Western Himalaya: Fission Track Evidence From The Indus Fan, Peng Zhou, Andrew Carter, Yuting Li, Peter D. Clift Jan 2020

Slowing Rates Of Regional Exhumation In The Western Himalaya: Fission Track Evidence From The Indus Fan, Peng Zhou, Andrew Carter, Yuting Li, Peter D. Clift

Faculty Publications

© Cambridge University Press 2019. We use apatite fission track ages from sediments recovered by the International Ocean Discovery Program in the Laxmi Basin, Arabian Sea, to constrain exhumation rates in the western Himalaya and Karakoram since 15.5 Ma. With the exception of a Triassic population in the youngest 0.93 Ma samples supplied from western Peninsular India, apatite fission track ages are overwhelmingly Cenozoic, largely <25 >Ma, consistent with both a Himalaya-Karakoram source and rapid erosion. Comparison of the minimum cooling age of each sample with depositional age (lag time) indicates an acceleration in exhumation between 7.8 and 7.0 Ma, with …

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Scales Of Stress Heterogeneity Near Active Faults In The Santa Barbara Channel, Southern California, Patricia Persaud, Edward H. Pritchard, Joann M. Stock Jan 2020

Scales Of Stress Heterogeneity Near Active Faults In The Santa Barbara Channel, Southern California, Patricia Persaud, Edward H. Pritchard, Joann M. Stock

Faculty Publications

The Santa Barbara Channel represents the offshore portion of the Ventura Basin in Southern California. Ongoing transpression related to a regional left step in the San Andreas Fault has led to the formation of E-W trending en-echelon fault systems that accommodate localized shortening across the basin. Recent studies have suggested that faults within the channel could be capable of a multisegment rupture and producing a M 7.7–8.1 tsunamigenic earthquake. However, dynamic rupture models producing these results do not account for stress heterogeneity. With only sparse information available on the stress field in this region, further borehole-derived stress constraints are essential …

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Sympathetic Innervation Of Inguinal White Adipose Tissue In The Mouse, Clara Huesing, Emily Qualls-Creekmore, Nathan Lee, Marie François, Hayden Torres, Rui Zhang, David H. Burk, Sangho Yu, Christopher D. Morrison, Hans Rudolf Berthoud, Winfried Neuhuber, Heike Münzberg Jan 2020

Sympathetic Innervation Of Inguinal White Adipose Tissue In The Mouse, Clara Huesing, Emily Qualls-Creekmore, Nathan Lee, Marie François, Hayden Torres, Rui Zhang, David H. Burk, Sangho Yu, Christopher D. Morrison, Hans Rudolf Berthoud, Winfried Neuhuber, Heike Münzberg

Faculty Publications

© 2020 The Authors. The Journal of Comparative Neurology published by Wiley Periodicals LLC. Adipose tissue plays an important role in metabolic homeostasis and its prominent role as endocrine organ is now well recognized. Adipose tissue is controlled via the sympathetic nervous system (SNS). New viral, molecular-genetic tools will soon allow a more detailed study of adipose tissue innervation in metabolic function, yet, the precise anatomical extent of preganglionic and postganglionic inputs to the inguinal white adipose tissue (iWAT) is limited. Furthermore, several viral, molecular-genetic tools will require the use of cre/loxP mouse models, while the available studies on sympathetic …

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Interaction Of Transmission-Distribution System In The Presence Of Der Units-Co-Simulation Approach, Mohammad Mehdi Rezvani, Shahab Mehraeen, Jayanth R. Ramamurthy, Thomas Field Jan 2020

Interaction Of Transmission-Distribution System In The Presence Of Der Units-Co-Simulation Approach, Mohammad Mehdi Rezvani, Shahab Mehraeen, Jayanth R. Ramamurthy, Thomas Field

Faculty Publications

The effects of distribution-connected solar farms on the transmission and distribution systems are studied in this paper using a practical power system network. Both the transmission and distribution networks are modeled and co-simulated for intermittent effects of solar power and changing load profiles. These effects include flicker in both the transmission and the distribution systems, operation of the substation Load Tap Changer (LTC) and feeder regulators, and distribution feeder voltage profiles. The results of the study show a potential hunting effect causing excessive LTC operation especially during periods of high reverse power flow condition and a significant visible flicker in …

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Role Of Geometric Shape In Chiral Optics, Philipp Gutsche, Xavier Garcia-Santiago, Philipp Immanuel Schneider, Kevin M. Mcpeak, Manuel Nieto-Vesperinas, Sven Burger Jan 2020

Role Of Geometric Shape In Chiral Optics, Philipp Gutsche, Xavier Garcia-Santiago, Philipp Immanuel Schneider, Kevin M. Mcpeak, Manuel Nieto-Vesperinas, Sven Burger

Faculty Publications

The distinction of chiral and mirror symmetric objects is straightforward from a geometrical point of view. Since the biological as well as the optical activity of molecules strongly depend on their handedness, chirality has recently attracted high interest in the field of nano-optics. Various aspects of associated phenomena including the influences of internal and external degrees of freedom on the optical response have been discussed. Here, we propose a constructive method to evaluate the possibility of observing any chiral response from an optical scatterer. Based on solely the T-matrix of one enantiomer, planes of minimal chiral response are located and …

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Reachable Sets For Safe, Real-Time Manipulator Trajectory Design, Patrick Holmes, Shreyas Kousik, Bohao Zhang, Daphna Raz, Corina Barbalata, Matthew Johnson-Roberson, Ram Vasudevan Jan 2020

Reachable Sets For Safe, Real-Time Manipulator Trajectory Design, Patrick Holmes, Shreyas Kousik, Bohao Zhang, Daphna Raz, Corina Barbalata, Matthew Johnson-Roberson, Ram Vasudevan

Faculty Publications

For robotic arms to operate in arbitrary environments, especially near people, it is critical to certify the safety of their motion planning algorithms. However, there is often a trade-o↵ between safety and real-time performance; one can either carefully design safe plans, or rapidly generate potentially-unsafe plans. This work presents a receding-horizon, real-time trajectory planner with safety guarantees, called ARMTD (Au-tonomous Reachability-based Manipulator Trajectory Design). The method first computes (o✏ine) a reachable set of parameterized trajectories for each joint of an arm. Each trajectory includes a fail-safe maneuver (braking to a stop). At runtime, in each receding-horizon planning iteration, ARMTD constructs …

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Severe Air Pollution Events Not Avoided By Reduced Anthropogenic Activities During Covid-19 Outbreak, P F. Wang, K Y. Chen, S Q. Zhu, P Wang, P F. Wang Jan 2020

Severe Air Pollution Events Not Avoided By Reduced Anthropogenic Activities During Covid-19 Outbreak, P F. Wang, K Y. Chen, S Q. Zhu, P Wang, P F. Wang

Faculty Publications

Due to the pandemic of coronavirus disease 2019 in China, almost all avoidable activities in China are prohibited since Wuhan announced lockdown on January 23, 2020. With reduced activities, severe air pollution events still occurred in the North China Plain, causing discussions regarding why severe air pollution was not avoided. The Community Multi-scale Air Quality model was applied during January 01 to February 12, 2020 to study PM2.5 changes under emission reduction scenarios. The estimated emission reduction case (Case 3) better reproduced PM2.5. Compared with the case without emission change (Case 1), Case 3 predicted that PM2.5 concentrations decreased by …

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Peak Pressures On Low Rise Buildings: Cfd With Les Versus Full Scale And Wind Tunnel Measurements, Aly Mousaad Aly, Hamzeh Gol-Zaroudi Jan 2020

Peak Pressures On Low Rise Buildings: Cfd With Les Versus Full Scale And Wind Tunnel Measurements, Aly Mousaad Aly, Hamzeh Gol-Zaroudi

Faculty Publications

This paper focuses on the processes of wind flow in the atmospheric boundary layer, to produce realistic full-scale pressures for the design of low-rise buildings. CFD with LES turbulence closure is implemented on a scale 1:1 prototype building. A proximity study was executed computationally in CFD with LES that suggests new recommendations on the computational domain size, in front of a building model, apart from common RANS-based guidelines (e.g. COST and AIJ). Our findings suggest a location of the test building, different from existing guidelines, and the inflow boundary proximity influences pressure correlation and reproduction of peak loads. The CFD …

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Three Dimensional Finite Element Model Of A Partially Continuous Joint, Marco Canales, Ayman Okeil Jan 2020

Three Dimensional Finite Element Model Of A Partially Continuous Joint, Marco Canales, Ayman Okeil

Faculty Publications

A detailed three-dimensional finite element model of a bridge joint with link slab continuity was developed and subjected to the same loading conditions as a three-dimensional finite element model of a bridge joint with a continuity diaphragm. Support conditions and material properties were homogenized between both models, and in order to determine the equivalent loading resulting from temperature gradient, a validated simplified line model was used. Displacements and rotations were then determined for the conditions in the detailed 3D model using the simplified line model and were applied to the corresponding elements in the 3D model. Results showed a different …

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Wettability Effects On Primary Drainage Mechanisms And Napl Distribution: A Pore-Scale Study, Ian L. Molnar, Jason I. Gerhard, Clinton S. Willson, Denis M. O'Carroll Jan 2020

Wettability Effects On Primary Drainage Mechanisms And Napl Distribution: A Pore-Scale Study, Ian L. Molnar, Jason I. Gerhard, Clinton S. Willson, Denis M. O'Carroll

Faculty Publications

The pore-scale processes governing water drainage behavior in porous media have implications for geoscience multiphase scenarios including carbon capture and storage, contaminant site remediation, oil recovery, and vadose zone processes. However, few studies report directly observed pore-scale water drainage phenomena in 3-D soils. This knowledge gap limits our ability to verify assumptions underlying existing models and develop optimal solutions. This paper utilizes synchrotron X-ray microtomography to present an experimental pore-scale examination of nonaqueous phase liquid (NAPL)/water distribution along a primary drainage front as dense NAPL was injected upward into water wetting (WW) and intermediate wetting (IW) sand-packed columns. Pore-network structures …

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Investigation Of Deformation Induced Micro To Macro Scale Surface Roughness, Ayotunde Olayinka, William J. Emblom, Scott W. Wagner, Michael Khonsari, Ali Haghshenas Jan 2020

Investigation Of Deformation Induced Micro To Macro Scale Surface Roughness, Ayotunde Olayinka, William J. Emblom, Scott W. Wagner, Michael Khonsari, Ali Haghshenas

Faculty Publications

In the present work the relationship between deformation and deformation induced surface roughness of 100 micron thick annealed AISI 304 stainless steel was investigated at the meso scale. This work is a continuation of the previous work by the authors where roughness values were determined at the apex of the bulge test samples at micro scale. The apex is believed to be the region of highest stress and strain in a typical bulge process in a circular die. The material was deformed using a biaxial bulge test through hydraulic fluid pressure. The strains on the workpieces were measured with respect …

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On The Wear Of Dynamically-Loaded Engine Bearings With Provision For Misalignment And Surface Roughness, J. Y. Jang, M. M. Khonsari Jan 2020

On The Wear Of Dynamically-Loaded Engine Bearings With Provision For Misalignment And Surface Roughness, J. Y. Jang, M. M. Khonsari

Faculty Publications

A computational model is developed to assess the effect of wear on the performance of an engine bearing. The model takes into account the variation of the film thickness under dynamic loading due to the wear of the bearing surface and shaft misalignment. The model adopts the mass-conservative cavitation algorithm to account for cavitation. To consider the surface roughness, the average flow model for the hydrodynamic pressure and the Kogut and Etsion model for the elastic-plastic contact pressure are implemented. A method for assessment of wear over long-term operation of an engine bearing to avoid failure is provided. To gain …

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Management Of Frequent Ed Users By Community Paramedics Improves Patient Experiences And Reduces Ems Utilization, Oluwakemi Aiyedun Adio, Laura H. Ikuma, Sonja D. Wiley Jan 2020

Management Of Frequent Ed Users By Community Paramedics Improves Patient Experiences And Reduces Ems Utilization, Oluwakemi Aiyedun Adio, Laura H. Ikuma, Sonja D. Wiley

Faculty Publications

This study examined a suburban emergency medical system (EMS)-led community paramedicine (CP) program in terms of adherence to protocol, patient-paramedic interactions, patient experience, and cost. Participants (n=57) are frequent emergency department (ED) users (≥ 4 ED visits/year), with a mean age of 59.8±17.6 years and have multiple chronic conditions. Of these, 36 completed a modified Clinician and Group Consumer Assessment of Healthcare Providers and Systems (CG-CAHPS) survey at 3- and 6-months following program enrollment. The main outcome measures were adherence to intake goals; types, modes, and frequencies of CP interventions; CG-CAHPS patient experience scores; and cost savings. Cost savings compared …

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First Person: The Pandemic's Silver Lining: Real Talk For Future Teachers, J Hipp Jan 2020

First Person: The Pandemic's Silver Lining: Real Talk For Future Teachers, J Hipp

Faculty Publications

When the COVID-19 pandemic closed her university campus, Jamie Hipp had to move her popular arts integration class for preservice teachers to a virtual format. She was surprised to learn that her students wanted more than regular sessions during their scheduled class times; they wanted additional opportunities for real teacher talk about going on interviews, setting up a classroom, and other practical matters that weren't being covered in their preservice program. Hipp set up a series of virtual sessions on topics of interest to students, in addition to regular class sessions. The sessions went so well that Hipp intends to …

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Effects Of The Laidback Fan-Shaped Hole Geometry On Film Cooling Performance Using Large Eddy Simulation, Hakun Jang, Mayank Tyagi Jan 2020

Effects Of The Laidback Fan-Shaped Hole Geometry On Film Cooling Performance Using Large Eddy Simulation, Hakun Jang, Mayank Tyagi

Faculty Publications

The higher temperature of the combustion chamber of a gas turbine yield higher efficiencies for the turbines but can affect the blade’s life. As a preventative method, Film-cooling is a useful technique to enhance the performance of it by injecting coolant jets that the metal surfaces can be protected against the hot main flow. To improve cooling efficiency and increase the life of these components, several cooling strategies have been introduced. In the present study, the effects of the laidback fan-shaped hole geometry, in particular, are examined against the conventional cylindrical hole geometry using Computational Fluid Dynamic simulations. Computations are …

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Synthesis Of Lamno3 & Ceo2-Mnox Nanocrystals For Selective Catalytic Reduction, Joseph Lane Jan 2020

Synthesis Of Lamno3 & Ceo2-Mnox Nanocrystals For Selective Catalytic Reduction, Joseph Lane

Honors Capstones

No abstract provided.

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Chronicle Of A Tragedy: A Comparison Of Early Modern Iberian Literature To La Manada, Graceanne Lacombe Jan 2020

Chronicle Of A Tragedy: A Comparison Of Early Modern Iberian Literature To La Manada, Graceanne Lacombe

Honors Capstones

No abstract provided.

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The Lonely Only: An Analysis Of The Theorizing Of United States Quota Culture Competiveness On The Modern-Day Black Woman, Russell Chamblee Wilder Jan 2020

The Lonely Only: An Analysis Of The Theorizing Of United States Quota Culture Competiveness On The Modern-Day Black Woman, Russell Chamblee Wilder

Honors Capstones

No abstract provided.

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Methods Of Making Polypeptides, Donghui Zhang, Jinbao Cao, Brandon Chan, David Siefker Dec 2019

Methods Of Making Polypeptides, Donghui Zhang, Jinbao Cao, Brandon Chan, David Siefker

College of Science Patents

Various embodiments disclosed relate to a method of forming a polypeptide. The method includes contacting a first amino acid-derived N-thiocarboxyanhydrosulfide monomer as a crystalline solid with a polymerization initiator (e.g., in an alkane suspension) to give a polypeptide product. The method further includes contacting the polypeptide product with a second amino acid-derived N-thiocarboxyanhydrosulfide monomer in an alkane suspension.

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Measurement Of Neutrino And Antineutrino Neutral-Current Quasielasticlike Interactions On Oxygen By Detecting Nuclear Deexcitation Γ Rays, K. Abe, R. Akutsu, A. Ali, C. Alt, C. Andreopoulos, L. Anthony, M. Antonova, S. Aoki, A. Ariga, Y. Ashida, E. T. Atkin, Y. Awataguchi, S. Ban, M. Barbi, G. J. Barker, G. Barr, C. Barry, M. Batkiewicz-Kwasniak, A. Beloshapkin, F. Bench, V. Berardi, S. Berkman, L. Berns, S. Bhadra, S. Bienstock, A. Blondel, S. Bolognesi, B. Bourguille Dec 2019

Measurement Of Neutrino And Antineutrino Neutral-Current Quasielasticlike Interactions On Oxygen By Detecting Nuclear Deexcitation Γ Rays, K. Abe, R. Akutsu, A. Ali, C. Alt, C. Andreopoulos, L. Anthony, M. Antonova, S. Aoki, A. Ariga, Y. Ashida, E. T. Atkin, Y. Awataguchi, S. Ban, M. Barbi, G. J. Barker, G. Barr, C. Barry, M. Batkiewicz-Kwasniak, A. Beloshapkin, F. Bench, V. Berardi, S. Berkman, L. Berns, S. Bhadra, S. Bienstock, A. Blondel, S. Bolognesi, B. Bourguille

Faculty Publications

Neutrino- A nd antineutrino-oxygen neutral-current quasielasticlike interactions are measured at Super-Kamiokande using nuclear deexcitation γ rays to identify signal-like interactions in data from a 14.94(16.35)×1020 protons-on-target exposure of the T2K neutrino (antineutrino) beam. The measured flux-averaged cross sections on oxygen nuclei are âσν-NCQEâ

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Characterization Of An Extensive Interface On Vitronectin For Binding To Plasminogen Activator Inhibitor-1: Adoption Of Structure In An Intrinsically Disordered Region, Letitia O. Puster, Christopher B. Stanley, Vladimir N. Uversky, Joseph E. Curtis, Susan Krueger, Yuzhuo Chu, Cynthia B. Peterson Dec 2019

Characterization Of An Extensive Interface On Vitronectin For Binding To Plasminogen Activator Inhibitor-1: Adoption Of Structure In An Intrinsically Disordered Region, Letitia O. Puster, Christopher B. Stanley, Vladimir N. Uversky, Joseph E. Curtis, Susan Krueger, Yuzhuo Chu, Cynthia B. Peterson

Faculty Publications

Copyright © 2019 American Chemical Society. Small-angle neutron scattering (SANS) measurements were pursued to study human vitronectin, a protein found in tissues and the circulation that regulates cell adhesion/migration and proteolytic cascades that govern hemostasis and pericellular proteolysis. Many of these functions occur via interactions with its binding partner, plasminogen activator inhibitor-1 (PAI-1), the chief inhibitor of proteases that lyse and activate plasminogen. We focused on a region of vitronectin that remains uncharacterized from previous X-ray scattering, nuclear magnetic resonance, and computational modeling approaches and which we propose is involved in binding to PAI-1. This region, which bridges the N-terminal …

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Evidence For Late-Stage Eruptive Mass Loss In The Progenitor To Sn2018gep, A Broad-Lined Ic Supernova: Pre-Explosion Emission And A Rapidly Rising Luminous Transient, Anna Y.Q. Ho, Daniel A. Goldstein, Steve Schulze, David K. Khatami, Daniel A. Perley, Mattias Ergon, Avishay Gal-Yam, Alessandra Corsi, Igor Andreoni, Cristina Barbarino, Eric C. Bellm, Nadia Blagorodnova, Joe S. Bright, E. Burns, S. Bradley Cenko, Virginia Cunningham, Kishalay De, Richard Dekany, Alison Dugas, Rob P. Fender, Claes Fransson, Christoffer Fremling, Adam Goldstein, Matthew J. Graham, David Hale, Assaf Horesh, Tiara Hung, Mansi M. Kasliwal, N. Paul M. Kuin, S. R. Kulkarni, Thomas Kupfer, Ragnhild Lunnan, Frank J. Masci Dec 2019

Evidence For Late-Stage Eruptive Mass Loss In The Progenitor To Sn2018gep, A Broad-Lined Ic Supernova: Pre-Explosion Emission And A Rapidly Rising Luminous Transient, Anna Y.Q. Ho, Daniel A. Goldstein, Steve Schulze, David K. Khatami, Daniel A. Perley, Mattias Ergon, Avishay Gal-Yam, Alessandra Corsi, Igor Andreoni, Cristina Barbarino, Eric C. Bellm, Nadia Blagorodnova, Joe S. Bright, E. Burns, S. Bradley Cenko, Virginia Cunningham, Kishalay De, Richard Dekany, Alison Dugas, Rob P. Fender, Claes Fransson, Christoffer Fremling, Adam Goldstein, Matthew J. Graham, David Hale, Assaf Horesh, Tiara Hung, Mansi M. Kasliwal, N. Paul M. Kuin, S. R. Kulkarni, Thomas Kupfer, Ragnhild Lunnan, Frank J. Masci

Faculty Publications

We present detailed observations of ZTF18abukavn (SN2018gep), discovered in high-cadence data from the Zwicky Transient Facility as a rapidly rising (1.4 ± 0.1 mag hr-1) and luminous (Mg,peak = -20 mag) transient. It is spectroscopically classified as a broad-lined stripped-envelope supernova (Ic-BL SN). The high peak luminosity (Lbol ≳ 3 × 1044 erg s-1), the short rise time (trise = 3 days in g band), and the blue colors at peak (g-r ∼ -0.4) all resemble the high-redshift Ic-BL iPTF16asu, as well as several other unclassified fast transients. The early discovery of SN2018gep (within an hour of shock breakout) enabled …

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New Loop Quantum Cosmology Modifications From Gauge-Covariant Fluxes, Klaus Liegener, Parampreet Singh Dec 2019

New Loop Quantum Cosmology Modifications From Gauge-Covariant Fluxes, Klaus Liegener, Parampreet Singh

Faculty Publications

Loop quantum cosmology is a symmetry reduced quantization of cosmological spacetimes based on loop quantum gravity. While it has been successful in resolution of various cosmological singularities and connecting Planck scale physics to phenomenology, its connection with loop quantum gravity has remained elusive. It is therefore important to integrate more and more features of the full theory into this framework and understand the reliability of physical predictions. In particular, if one wishes to connect the effective Hamiltonian in loop quantum cosmology to an expectation value of the scalar constraint operator in suitable coherent states for the full theory, one has …

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