cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Linearized Stability of Bardeen de-Sitter Thin-Shell Wormholes
Creators: name: Alshal, Hassan
Publisher: name: arXiv
Year: 2019
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: A thin-shell wormhole is crafted by the cut-and-paste method of two Bardeen de-Sitter black holes using Darmois-Israel formalism. Energy conditions are considered for different values of magnetic charge while both mass and cosmological constant are fixed. The attractive and repulsive characteristics of the throat of the thin-shell wormhole are also examined through the radial acceleration. Dynamics and stability of the wormhole are studied around the static solutions of the linearized radial perturbations at the throat of the wormhole. The regions of stability are determined by checking out the condition of concavity of the potential as a function in the throat radius for different values of magnetic charges.
description: Minor typos fixed, made in 2 columns style to appear in Europhysics Letters (EPL)
Reorganisation of Brain Hubs across Altered States of Consciousness
Creators: name: Vatansever, D.
name: Schröter, M.
name: Adapa, R. M.
name: Bullmore, E. T.
name: Menon, D. K.
name: Stamatakis, E. A.
Publisher: name: Apollo - University of Cambridge Repository
Year: 2020
Subjects: Article
/631/378/2649/1398
/631/378/116/1925
/59/36
/59/57
article

description: Abstract: Patterns of functional interactions across distributed brain regions are suggested to provide a scaffold for the conscious processing of information, with marked topological alterations observed in loss of consciousness. However, establishing a firm link between macro-scale brain network organisation and conscious cognition requires direct investigations into neuropsychologically-relevant architectural modifications across systematic reductions in consciousness. Here we assessed both global and regional disturbances to brain graphs in a group of healthy participants across baseline resting state fMRI as well as two distinct levels of propofol-induced sedation. We found a persistent modular architecture, yet significant reorganisation of brain hubs that formed parts of a wider rich-club collective. Furthermore, the reduction in the strength of rich-club connectivity was significantly associated with the participants’ performance in a semantic judgment task, indicating the importance of this higher-order topological feature for conscious cognition. These results highlight a remarkable interplay between global and regional properties of brain functional interactions in supporting conscious cognition that is relevant to our understanding of clinical disorders of consciousness.
Chemical composition, antioxidant activities and antibacterial activities of essential oil from Erythrina caffra Thunb. growing in South Africa
Creators: name: Wintola, Olubunmi A.
name: Olajuyigbe, Aderonke A.
name: Afolayan, Anthony J.
name: Coopoosamy, Roger M.
name: Olajuyigbe, Olufunmiso O.
Publisher: name: Mangosuthu University of Technology (MUT)
Year: 2022
Subjects: subject: Microbiology
subject: FOS: Biological sciences

description: Introduction: Essential oils from plants are recognized as one of the most promising secondary metabolites for the development of cheap and safer drugs. While Erythrina caffra has been prominently used in folk medicine for the treatment of microbial infections, there is dearth of information on the pharmacological effectiveness and chemical composition of its essential oil. The study, therefore, aimed at identifying the chemical composition and biological activities of the essential oil of Erythrina caffra. Methods: In this study, the essential oil was extracted with all-glass Clevenger. The antioxidant activities of the essential oil and antibacterial susceptibility assay by agar well diffusion techniques were assessed while GC-MS analysis was performed to identify the chemical constituents of the essential oil. Results: The study showed that the radical scavenging activity of the essential oil increases as the concentration of the essential oil increases. All bacterial isolates were susceptible to essential oil with the exception of Salmonella typhimurium and Pseudomonas aeruginosa producing inhibition zones ranging between 22 ? 1.3 and 35 ? 2.1 mm in the susceptible isolates. The GC-MS chromatogram indicated there are 35 bioactive compounds in the essential oil and Caryophyllene oxide (53.54%), [1S-(1α,7α,8aβ)]-1,2,3,5,6,7,8,8a-octa-1 - hydro-1,8a-dimethyl-7-(1- methylethenyl)-Naphthalene (7.81%), Kauran-18-al (6.49%), 10,10-Dimethyl-2,6-dimethylenebicy clo[7.2.0] undecan-5.beta.-ol (5.83%), 10s,11s-Himachala-3(12),4-diene (4.51%), Caryophyllene (3.65%) and 1- Hexanol (3.31%) were the most prominent compounds. Conclusion: Excessive production of free radicals or reactive oxygen species (ROS) causes oxidative stress and disease. Oxidative stress resulting from imbalance between excessive generation of free radicals and inadequate antioxidant defense system has been linked to pathogenesis of many diseases. The essential oil of E. caffra stem bark extract possess antimicrobial and good antioxidant activities and its rich level of phytochemicals can be used as either dietary or complementary agents.
Structural properties of molten silicates from ab initio molecular-dynamics simulations: comparison between CaO-Al$_2$O$_3$-SiO$_2$ and SiO$_2$
Creators: name: Benoit, Magali
name: Ispas, Simona
name: Tuckerman, Mark E.
Publisher: name: arXiv
Year: 2001
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We present the results of first-principles molecular-dynamics simulations of molten silicates, based on the density functional formalism. In particular, the structural properties of a calcium aluminosilicate $ [$ CaO-Al$_2$O$_3$-SiO$_2$ $ ]$ melt are compared to those of a silica melt. The local structures of the two melts are in good agreement with the experimental understanding of these systems. In the calcium aluminosilicate melt, the number of non-bridging oxygens found is in excess of the number obtained from a simple stoichiometric prediction. In addition, the aluminum avoidance principle, which states that links between AlO$_4$ tetrahedra are absent or rare, is found to be violated. Defects such as 2-fold rings and 5-fold coordinated silicon atoms are found in comparable proportions in both liquids. However, in the calcium aluminosilicate melt, a larger proportion of oxygen atoms are 3-fold coordinated. In addition, 5-fold coordinated aluminum atoms are observed. Finally evidence of creation and anihilation of non-bridging oxygens is observed, with these oxygens being mostly connected to Si tetrahedra.
description: 20 pages, 9 figures, 1 table. Physical Review B, in press
Cross-Platform Verification of Intermediate Scale Quantum Devices
Creators: name: Elben, Andreas
name: Vermersch, Benoît
name: van Bijnen, Rick
name: Kokail, Christian
name: Brydges, Tiff
name: Maier, Christine
name: Joshi, Manoj
name: Blatt, Rainer
name: Roos, Christian F.
name: Zoller, Peter
Publisher: name: arXiv
Year: 2019
Subjects: subject: Quantum Physics (quant-ph)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We describe a protocol for cross-platform verification of quantum simulators and quantum computers. We show how to measure directly the overlap $\textrm{Tr}\left[ρ_1 ρ_2\right]$ and the purities $\textrm{Tr}\left[ρ^2_{1,2}\right]$, and thus a fidelity of two possibly mixed quantum states $ρ_1$ and $ρ_2$ prepared in separate experimental platforms. We require only local measurements in randomized product bases, which are communicated classically. As a proof-of-principle, we present the measurement of experiment-theory fidelities for entangled $10$-qubit quantum states in a trapped ion quantum simulator.
description: Published Version
Sterilization of Money Inflows: Difficult (Calvo) or Easy (Reisen)?
Creators: name: Frankel, Jeffrey A.
name: Frankel, Jeffrey A.
Publisher: name: Unknown
Year: 1993
Subjects: subject: Financial Economics
subject: sterilization
subject: capital flows
subject: reserve flows
subject: monetary approach to the balance of payments
subject: Colombia

description: Some countries undergoing exchange-rate-based stabilization and financial liberalization in Latin America and elsewhere have faced large capital inflows since 1991. Many have tried to sterilize the reserve inflows. Calvo and co-authors argue essentially that sterilization is more difficult than generally realized, due to the interest costs on sterilization bonds. Reisen argues essentially that sterilization is easier than generally believed. This paper reviews the issues in the simplest textbook model. The conclusions are that local interest rates are not likely to rise if the source of the disturbance is an exogenous capital inflow, but will rise if the disturbance is an increase in money demand or an increase in exports. In every case, sterilized intervention will leave interest rates higher than they would be if the inflow took place unsterilized. The case where the domestic money supply and the rest of the economy are insulated from foreign disturbances despite perfect capital mobility and a fixed exchange rate, which Reisen attributes to Southeast Asia, is seen to be the case where domestic agents are unresponsive to interest rates.
Decentralized Spectrum Learning for IoT Wireless Networks Collision Mitigation
Creators: name: Moy, Christophe
name: Besson, Lilian
Publisher: name: arXiv
Year: 2019
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: Signal Processing (eess.SP)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper describes the principles and implementation results of reinforcement learning algorithms on IoT devices for radio collision mitigation in ISM unlicensed bands. Learning is here used to improve both the IoT network capability to support a larger number of objects as well as the autonomy of IoT devices. We first illustrate the efficiency of the proposed approach in a proof-of-concept based on USRP software radio platforms operating on real radio signals. It shows how collisions with other RF signals present in the ISM band are diminished for a given IoT device. Then we describe the first implementation of learning algorithms on LoRa devices operating in a real LoRaWAN network, that we named IoTligent. The proposed solution adds neither processing overhead so that it can be ran in the IoT devices, nor network overhead so that no change is required to LoRaWAN. Real life experiments have been done in a realistic LoRa network and they show that IoTligent device battery life can be extended by a factor 2 in the scenarios we faced during our experiment.
Usia (Micrusia) Evenhuis 1990
Creators: name: Gibbs, David
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Bombyliidae
Usia

description: Subgenus Micrusia Evenhuis, 1990
 Micrusia Evenhuis, 1990: 38 (as subgenus of Usia Latreille). Type species: Usia forcipata Brullé, 1833, by original designation.
Included species:
description: Published as part of Gibbs, David, 2011, 2960, pp. 1-77 in Zootaxa 2960 on page 22
Calculating the Prepotential by Localization on the Moduli Space of Instantons
Creators: name: Hollowood, Timothy J.
Publisher: name: arXiv
Year: 2002
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We describe a new technique for calculating instanton effects in supersymmetric gauge theories applicable on the Higgs or Coulomb branches. In these situations the instantons are constrained and a potential is generated on the instanton moduli space. Due to existence of a nilpotent fermionic symmetry the resulting integral over the instanton moduli space localizes on the critical points of the potential. Using this technology we calculate the one- and two-instanton contributions to the prepotential of SU(N) gauge theory with N=2 supersymmetry and show how the localization approach yields the prediction extracted from the Seiberg-Witten curve. The technique appears to extend to arbitrary instanton number in a tractable way.
description: 24 pages, JHEP.cls, more references and extra discussion on N_F=2N case
Non-intersection of transient branching random walks
Creators: name: Hutchcroft, Tom
Publisher: name: Apollo - University of Cambridge Repository
Year: 2020
Subjects: Article
60D04
60K35

description: Funder: University of Cambridge
description: Abstract: Let G be a Cayley graph of a nonamenable group with spectral radius ρ<1. It is known that branching random walk on G with offspring distribution μ is transient, i.e., visits the origin at most finitely often almost surely, if and only if the expected number of offspring μ¯ satisfies μ¯≤ρ-1. Benjamini and Müller (Groups Geom Dyn, 6:231–247, 2012) conjectured that throughout the transient supercritical phase 1
Identity Artefacts and Memory as Pedagogy
Creators: name: Puttick, M-R.
Publisher: name: Living Refugee Archive, University of East London
Year: 2020

description: Mary-Rose is currently writing up her doctoral research: ‘Reimagining family literacy: exploring the pedagogies of migrating mothers in third sector spaces’. This two-year pedagogical ethnographic study took place in two third-sector organisations in the West Midlands, with an experimental pedagogical space established in each. Three perspectives were explored: the researcher/teacher; third sector practitioners; and refugee and asylumseeking mothers from Somalia, Afghanistan and Kurdistan. The research is underpinned by a postcolonial feminist framework, and approaches literacy from a social practice perspective, that is the being and doing of literacies. The mothers’ presented visual, sensory, and oral methods to represent their socially and historically situated experiences of motherhood, migrancy and literacies. This included using symbolic objects as 'identity artefacts'. The research aims to understand the experiences of migrating mothers in third sector spaces and to expand ways of knowing about teaching and learning beyond government-funded contexts.
Smoothing Splines Approximation Using Hilbert Curve Basis Selection
Creators: name: Meng, Cheng
name: Yu, Jun
name: Chen, Yongkai
name: Zhong, Wenxuan
name: Ma, Ping
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biochemistry
subject: Cell Biology
subject: Molecular Biology
subject: Biotechnology
subject: Chemical Sciences not elsewhere classified
subject: Immunology
subject: FOS: Clinical medicine
subject: Information Systems not elsewhere classified
subject: Mathematical Sciences not elsewhere classified
subject: Marine Biology
subject: Cancer
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Computational Biology

description: Smoothing splines have been used pervasively in nonparametric regressions. However, the computational burden of smoothing splines is significant when the sample size n is large. When the number of predictors d≥2, the computational cost for smoothing splines is at the order of O(n3) using the standard approach. Many methods have been developed to approximate smoothing spline estimators by using q basis functions instead of n ones, resulting in a computational cost of the order O(nq2). These methods are called the basis selection methods. Despite algorithmic benefits, most of the basis selection methods require the assumption that the sample is uniformly distributed on a hypercube. These methods may have deteriorating performance when such an assumption is not met. To overcome the obstacle, we develop an efficient algorithm that is adaptive to the unknown probability density function of the predictors. Theoretically, we show the proposed estimator has the same convergence rate as the full-basis estimator when q is roughly at the order of O[n2d/{(pr+1)(d+2)}], where p∈[1,2] and r≈4 are some constants depend on the type of the spline. Numerical studies on various synthetic datasets demonstrate the superior performance of the proposed estimator in comparison with mainstream competitors. Supplementary files for this article are available online.
Long-term expansion, genomic stability and in vivo safety of adult human pancreas organoids
Creators: name: Georgakopoulos, Nikitas
name: Prior, Nicole
name: Angres, Brigitte
name: Mastrogiovanni, Gianmarco
name: Cagan, Alex
name: Harrison, Daisy
name: Hindley, Christopher J.
name: Arnes-Benito, Robert
name: Liau, Siong-Seng
name: Curd, Abbie
name: Ivory, Natasha
name: Simons, Benjamin D.
name: Martincorena, Inigo
name: Wurst, Helmut
name: Saeb-Parsy, Kourosh
name: Huch, Meritxell
Publisher: name: Apollo - University of Cambridge Repository
Year: 2020
Subjects: Methodology Article
Organogenesis and Organoids
Pancreas
Organoid
In vivo safety
Chemically defined hydrogel
Genetic stability
Primary cultures

description: Abstract: Background: Pancreatic organoid systems have recently been described for the in vitro culture of pancreatic ductal cells from mouse and human. Mouse pancreatic organoids exhibit unlimited expansion potential, while previously reported human pancreas organoid (hPO) cultures do not expand efficiently long-term in a chemically defined, serum-free medium. We sought to generate a 3D culture system for long-term expansion of human pancreas ductal cells as hPOs to serve as the basis for studies of human pancreas ductal epithelium, exocrine pancreatic diseases and the development of a genomically stable replacement cell therapy for diabetes mellitus. Results: Our chemically defined, serum-free, human pancreas organoid culture medium supports the generation and expansion of hPOs with high efficiency from both fresh and cryopreserved primary tissue. hPOs can be expanded from a single cell, enabling their genetic manipulation and generation of clonal cultures. hPOs expanded for months in vitro maintain their ductal morphology, biomarker expression and chromosomal integrity. Xenografts of hPOs survive long-term in vivo when transplanted into the pancreas of immunodeficient mice. Notably, mouse orthotopic transplants show no signs of tumorigenicity. Crucially, our medium also supports the establishment and expansion of hPOs in a chemically defined, modifiable and scalable, biomimetic hydrogel. Conclusions: hPOs can be expanded long-term, from both fresh and cryopreserved human pancreas tissue in a chemically defined, serum-free medium with no detectable tumorigenicity. hPOs can be clonally expanded, genetically manipulated and are amenable to culture in a chemically defined hydrogel. hPOs therefore represent an abundant source of pancreas ductal cells that retain the characteristics of the tissue-of-origin, which opens up avenues for modelling diseases of the ductal epithelium and increasing understanding of human pancreas exocrine biology as well as for potentially producing insulin-secreting cells for the treatment of diabetes.
An Archaeological Curation Needs Assessment of Military Installations in Select Western States - Report (Legacy 97-0076)
Creators: name: Felix, Susan S.
name: Halpin, Amy E.
name: Marino, Eugene A.
name: McSween, Steve
name: D. Lynn Murdoch
name: Samerdyke, Julia A.
name: Shingleton, Kenneth L.
name: Yu, Sylvia
Publisher: name: DoD Legacy Resource Management Program
Year: 2000
Subjects: subject: Colorado
valueUri: https://core.tdar.org/browse/geographic-keyword/113/colorado
subject: Louisiana
valueUri: https://core.tdar.org/browse/geographic-keyword/193/louisiana
subject: Arizona
valueUri: https://core.tdar.org/browse/geographic-keyword/2/arizona
subject: New Mexico
valueUri: https://core.tdar.org/browse/geographic-keyword/21/new-mexico
subject: Utah
valueUri: https://core.tdar.org/browse/geographic-keyword/3831/utah
subject: Oklahoma
valueUri: https://core.tdar.org/browse/geographic-keyword/120/oklahoma
subject: Nevada
valueUri: https://core.tdar.org/browse/geographic-keyword/89/nevada
subject: Alaska
valueUri: https://core.tdar.org/browse/geographic-keyword/19929/alaska
subject: Hawaii
valueUri: https://core.tdar.org/browse/geographic-keyword/91/hawaii
subject: Texas
valueUri: https://core.tdar.org/browse/geographic-keyword/6923/texas
subject: Washington D.C.
valueUri: https://core.tdar.org/browse/geographic-keyword/76908/washington-dc
subject: United States
valueUri: https://core.tdar.org/browse/geographic-keyword/10460/united-states
subject: Curation
valueUri: https://core.tdar.org/browse/other-keyword/9869/curation
subject: Department of Defense
valueUri: https://core.tdar.org/browse/other-keyword/123614/department-of-defense
subject: 36 CFR 79
valueUri: https://core.tdar.org/browse/other-keyword/123565/36-cfr-79
subject: Curation-Needs Assessment
valueUri: https://core.tdar.org/browse/other-keyword/134208/curation-needs-assessment
subject: Military Installation
valueUri: https://core.tdar.org/browse/other-keyword/159731/military-installation
subject: Archaeology
valueUri: https://core.tdar.org/browse/other-keyword/7074/archaeology
subject: Archaeological Overview
valueUri: https://core.tdar.org/browse/investigation-type/1/archaeological-overview
subject: Heritage Management
valueUri: https://core.tdar.org/browse/investigation-type/24/heritage-management

description: This assessment reviewed all active military installations in Alaska, Colorado, Hawaii, Kansas, Louisiana, Oklahoma, Nevada, New Mexico, Texas, Utah, and the District of Columbia (86 facilities, including research firms, public and private museums, military installations, university lab/curation facilities, and government agencies). The document presents recommendations for compliance with 36 CFR Part 79.
“Resistance is our Culture”: An Archival Exploration of Oromo Diaspora Organizing
Creators: name: Jaye Bass, M.
Publisher: name: Living Refugee Archive, University of East London
Year: 2020

description: The Oromo people of the Horn of Africa have been engaged in a struggle for liberation and justice since their colonization by the Abyssinian Empire in the 1880s. Despite, beyond, and against this discursive violence, Oromo people have been creating liberatory spaces and alternative stories of Oromo life. In this article I explore resistance writing and organizational materials created by members of the Oromo diaspora in the 1970s and 1980s. This archival collection, housed in Berlin, Germany, shares a story of transnational solidarity. It also demonstrates the power of the archive itself as an active participant in documenting, remembering, and supporting the Oromo struggle.
Coupled VO 2 Oscillators Circuit as Analog First Layer Filter in Convolutional Neural Networks
Creators: name: Corti, Elisabetta
name: Cornejo Jimenez, Joaquin Antonio
name: Niang, Kham M.
name: Robertson, John
name: Moselund, Kirsten E.
name: Gotsmann, Bernd
name: Ionescu, Adrian M.
name: Karg, Siegfried
Publisher: name: Apollo - University of Cambridge Repository
Year: 2021
Subjects: Neuroscience
oscillatory neural network
vanadium dioxide
phase-encoding
convolutional neural networks
pattern recognition
relaxation oscillators
coupled oscillators

description: In this work we present an in-memory computing platform based on coupled VO2 oscillators fabricated in a crossbar configuration on silicon. Compared to existing platforms, the crossbar configuration promises significant improvements in terms of area density and oscillation frequency. Further, the crossbar devices exhibit low variability and extended reliability, hence, enabling experiments on 4-coupled oscillator. We demonstrate the neuromorphic computing capabilities using the phase relation of the oscillators. As an application, we propose to replace digital filtering operation in a convolutional neural network with oscillating circuits. The concept is tested with a VGG13 architecture on the MNIST dataset, achieving performances of 95% in the recognition task.
Observation of protein thermodynamics in ice by passive millimeter-wave microscopy
Creators: name: Ishino, Manabu
name: Kishigami, Akio
name: Kudo, Hiroyuki
name: Bae, Jongsuck
name: Nozokido, Tatsuo
Publisher: name: arXiv
Year: 2019
Subjects: subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: The study of protein functions attributed to the conformation and fluctuation that are ruled by both the amino acid sequence and thermodynamics, requires thermodynamic quantities given by calorimetry using thermometric techniques. The increased need for protein function in different applications requires improvements of measurement systems assessing protein thermodynamics to handle many kinds of samples quickly. We have developed a passive millimeter-wave microscope that allows near-field imaging of thermal radiation, even in the low temperature range under room temperature where passive infrared imaging systems are ineffective. This advantage of our microscope system in combination with low thermal emission property of water ice in the millimeter-wave region enables the characterization of the thermal radiation from the proteins themselves in aqueous solution at a temperature range low enough to freeze water and to trap conformation intermediates in the proteins. Experiments performed at a millimeter-wave frequency of 50 GHz in a temperature range from 130 K to 270 K for a 20 % bovine serum albumin (BSA) aqueous solution showed a displacement between two conformational states of BSA at a temperature of approximately 190 K as a boundary. Our microscope system using this freeze-trapping method is expected to provide noninvasive thermal images to enable novel high-throughput calorimetry useful for the analysis of protein functions.
description: 21 pages, 5 figures, A pre-print for the manuscript accepted for publication in "Journal of Infrared, Millimeter, and Terahertz Waves"
Resisting the Trauma Story: Ethical Concerns in the Oral History Archive
Creators: name: Randall, K.
name: Powell, K. M.
name: Shadle, B. L.
Publisher: name: Living Refugee Archive, University of East London
Year: 2020

description: This short article presents an oral history project undertaken with refugees resettled in Southwest Virginia. From this project has emerged an understanding of refugees as curators of a personal archive of stories. A birth-to-present oral history approach can resist the reductive trauma narratives refugees are often expected to tell, yet oral historians and archivists must also be aware of the story told by the archive framework itself. The authors explore the ethical challenges of amplifying oral histories from refugees in a way that inspires action without centering the trauma story, and leave readers with questions for reflection.
The Infrared Behaviour of the Running Coupling in Landau Gauge QCD
Creators: name: Alkofer, R.
name: Fischer, C. S.
name: von Smekal, L.
Publisher: name: arXiv
Year: 2002
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Approximate solutions for the gluon and ghost propagators as well as the running coupling in Landau gauge Yang-Mills theories are presented. These propagators obtained from the corresponding Dyson-Schwinger equations are in remarkable agreement with those of recent lattice calculations. The resulting running coupling possesses an infrared fixed point, $α_S(0) = 8.92/N_c$ for all gauge groups SU($N_c$). Above one GeV the running coupling rapidly approaches its perturbative form.
description: 8 pages, 3 figures, uses ActaStyle.cls, Invited talk given by R.A. at the conference RENORMALIZATION GROUP 2002, March 10 - 16, 2002, Strba, Slovakia
Emerging Currency Blocs
Creators: name: Frankel, Jeffrey A.
name: Wei, Shang-Jin
name: Frankel, Jeffrey A.
name: Wei, Shang-Jin
Publisher: name: Unknown
Year: 1993
Subjects: subject: Financial Economics
subject: trade blocs
subject: gravity model
subject: EC
subject: EFTA
subject: exchange rate uncertainty

description: Using the gravity model to examine bilateral trade patterns throughout the world, we find clear evidence of trading blocs in Europe, the Western Hemisphere, East Asia, and the Pacific. In Europe, it is the EC that operates as a bloc, not including EFTA. Two EC members trade an extra 55 percent more with each other, beyond what can be explained by proximity, size, and GNP/capita. Turning to the possibility of currency blocs, we find a degree of intra-regional stabilization of exchange rates, especially in Europe. Not surprisingly, the European currencies link to the DM, while Pacific currencies link to the dollar. We also find some cross-section evidence that bilateral exchange rate stability may have had a (small) role in promoting intra-bloc trade during the period 1965-1980. In 1980, lower exchange rate variability within Europe, compared to the worldwide norm, increased trade by 4.4 percent, by one estimate (less, in an estimate that corrects for simultaneity). Even the small negative effects we estimate appear to have disappeared during the course of the 1980s, perhaps due to the proliferation of instruments to hedge exchange risk.
Photoinduced Anomalous Coulomb Blockade and the Role of Triplet States in Electron Transport through an Irradiated Molecular Transistor II: Effects of Electron-Phonon Coupling and Vibrational Relaxation
Creators: name: Fu, Bo
name: Hsu, Liang-Yan
Publisher: name: arXiv
Year: 2019
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We generalize our previous theory [Nano Lett. \textbf{18}, 5015-5023 (2018)] to investigate the influence of electron-phonon (e-p) coupling and vibrational relaxation on photoinduced \textit{anomalous Coulomb blockade}, which originates from the triplet states and the energy level alignment. We derive the master equation for an irradiated molecular transistor and obtain the relevant rates via the Redfield theory instead of the phenomenological Fermi golden rule approach. To explore the interplay between e-p coupling and vibrational relaxation, we analyze the charge stability diagrams and the current-voltage characteristics (both gate voltage and source-drain bias voltage) under different e-p coupling strengths in two extreme limits of vibrational relaxation (equilibrated and unequilibrated phonon regimes). From the perspective of energy level alignment, we choose four representative situations and derive the analytical formulas of the photoinduced current in the equilibrated regime. The analytical solution reveals a new type of photocurrent due to e-p coupling that does not require the perfect energy level alignment between charged states and triplet states. In general, our study indicates that photoinduced current and anomalous Coulomb blockade caused by the triplet states are supposed to be experimentally observed.
description: 25 pages, 8 figures, 1 table
Crowdfunding in Wine
Creators: name: Bargain, Olivier
name: Cardebat, Jean-Marie
name: Vignolles, Alexandra
name: Bargain, Olivier
name: Cardebat, Jean-Marie
name: Vignolles, Alexandra
Publisher: name: Unknown
Year: 2016
Subjects: subject: Agribusiness
subject: Agricultural Finance
subject: crowdfunding
subject: wine sector
subject: alternative assets

description: Crowdfunding has recently emerged as a novel way of financing new ventures. This coincides with a growing interest in wine as an investment good and with a search for new funding opportunities by wine makers. In this study, we first suggest a brief review of the literature on wine and finance as well as on how crowdfunding is entering the wine sector. In particular, we question who are the potential investors willing to engage in wine crowdfunded projects, and what kind of revenue could attract them. To go further, we also exploit an original survey where interviewees are asked about their wine consumption and purchase, their knowledge about crowdfunding, their relation to the Internet, their investment and project related to wine crowdfunding and their expectations concerning the returns from this type of contribution. We suggest that, among all forms of crowdfunding, the donation/voluntary contribution side, driven by intrinsic motivation, is likely to remain marginal compared to crowdfunding as an investment or a form of early purchase - a retail form of the “en primeur” sales. More generally, we ask how the public can help finance this sector and diversify the way wine is sold.
Diversity of KIR genes and their HLA-C ligands in Ugandan populations with historically varied malaria transmission intensity
Creators: name: Tukwasibwe, Stephen
name: Traherne, James A.
name: Chazara, Olympe
name: Jayaraman, Jyothi
name: Trowsdale, John
name: Moffett, Ashley
name: Jiang, Wei
name: Nankabirwa, Joaniter I.
name: Rek, John
name: Arinaitwe, Emmanuel
name: Nsobya, Samuel L.
name: Atuheirwe, Maxine
name: Frank, Mubiru
name: Godwin, Anguzu
name: Jagannathan, Prasanna
name: Cose, Stephen
name: Kamya, Moses R.
name: Dorsey, Grant
name: Rosenthal, Philip J.
name: Colucci, Francesco
name: Nakimuli, Annettee
Publisher: name: Apollo - University of Cambridge Repository
Year: 2021
Subjects: Research
Genetic diversity
Human leukocyte antigen
Killer-cell immunoglobulin-like receptor
Malaria
Uganda

description: Abstract: Background: Malaria is one of the most serious infectious diseases in the world. The malaria burden is greatly affected by human immunity, and immune responses vary between populations. Genetic diversity in KIR and HLA-C genes, which are important in immunity to infectious diseases, is likely to play a role in this heterogeneity. Several studies have shown that KIR and HLA-C genes influence the immune response to viral infections, but few studies have examined the role of KIR and HLA-C in malaria infection, and these have used low-resolution genotyping. The aim of this study was to determine whether genetic variation in KIR and their HLA-C ligands differ in Ugandan populations with historically varied malaria transmission intensity using more comprehensive genotyping approaches. Methods: High throughput multiplex quantitative real-time PCR method was used to genotype KIR genetic variants and copy number variation and a high-throughput real-time PCR method was developed to genotype HLA-C1 and C2 allotypes for 1344 participants, aged 6 months to 10 years, enrolled from Ugandan populations with historically high (Tororo District), medium (Jinja District) and low (Kanungu District) malaria transmission intensity. Results: The prevalence of KIR3DS1, KIR2DL5, KIR2DS5, and KIR2DS1 genes was significantly lower in populations from Kanungu compared to Tororo (7.6 vs 13.2%: p = 0.006, 57.2 vs 66.4%: p = 0.005, 33.2 vs 46.6%: p < 0.001, and 19.7 vs 26.7%: p = 0.014, respectively) or Jinja (7.6 vs 18.1%: p < 0.001, 57.2 vs 63.8%: p = 0.048, 33.2 vs 43.5%: p = 0.002, and 19.7 vs 30.4%: p < 0.001, respectively). The prevalence of homozygous HLA-C2 was significantly higher in populations from Kanungu (31.6%) compared to Jinja (21.4%), p = 0.043, with no significant difference between Kanungu and Tororo (26.7%), p = 0.296. Conclusions: The KIR3DS1, KIR2DL5, KIR2DS5 and KIR2DS1 genes may partly explain differences in transmission intensity of malaria since these genes have been positively selected for in places with historically high malaria transmission intensity. The high-throughput, multiplex, real-time HLA-C genotyping PCR method developed will be useful in disease-association studies involving large cohorts.
Positive energy unitary irreducible representations of D=6 conformal supersymmetry
Creators: name: Dobrev, V. K.
Publisher: name: arXiv
Year: 2002
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We give a constructive classification of the positive energy (lowest weight) unitary irreducible representations of the D=6 superconformal algebras osp(8*/2N). Our results confirm all but one of the conjectures of Minwalla (for N=1,2) on this classification. Our main tool is the explicit construction of the norms of the states that has to be checked for positivity. We give also the reduction of the exceptional UIRs.
description: 27 pages, TeX with harvmac, amssym.def, amssym.tex; v.2: minor corrections and references added; v.3: minor corrections; v.4: to appear in J. Phys. A
Coefficients of Wronskian Hermite polynomials
Creators: name: Bonneux, Niels
name: Dunning, Clare
name: Stevens, Marco
Publisher: name: arXiv
Year: 2019
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: We study Wronskians of Hermite polynomials labelled by partitions and use the combinatorial concepts of cores and quotients to derive explicit expressions for their coefficients. These coefficients can be expressed in terms of the characters of irreducible representations of the symmetric group, and also in terms of hook lengths. Further, we derive the asymptotic behaviour of the Wronskian Hermite polynomials when the length of the core tends to infinity, while fixing the quotient. Via this combinatorial setting, we obtain in a natural way the generalization of the correspondence between Hermite and Laguerre polynomials to Wronskian Hermite polynomials and Wronskians involving Laguerre polynomials. Lastly, we generalize most of our results to polynomials that have zeros on the $p$-star.
description: 41 pages
A robotic pipeline for fast GRB followup with the Las Cumbres observatory network
Creators: name: Martone, R.
name: Guidorzi, C.
name: Mundell, C. G.
name: Kobayashi, S.
name: Cucchiara, A.
name: Gomboc, A.
name: Jordana, N.
name: Laskar, T.
name: Marongiu, M.
name: Morris, D. C.
name: Smith, R. J.
name: Steele, I. A.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: In the era of multi-messenger astronomy the exploration of the early emission from transients is key for understanding the encoded physics. At the same time, current generation networks of fully-robotic telescopes provide new opportunities in terms of fast followup and sky coverage. This work describes our pipeline designed for robotic optical followup of gamma-ray bursts with the Las Cumbres Observatory network. We designed a Python code to promptly submit observation requests to the Las Cumbres Observatory network within 3 minutes of the receipt of the socket notice. Via Telegram the pipeline keeps the users informed, allowing them to take control upon request. Our group was able to track the early phases of the evolution of the optical output from gamma-ray bursts with a fully-robotic procedure and here we report the case of GRB180720B as an example. The developed pipeline represent a key ingredient for any reliable and rapid (minutes timescale) robotic telescope system. While successfully utilized and adapted for LCO, it can also be adapted to any other robotic facilities.
Dependence of the Inner DM Profile on the Halo Mass
Creators: name: Ricotti, Massimo
Publisher: name: arXiv
Year: 2002
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: I compare the density profile of dark matter (DM) halos in cold dark matter (CDM) N-body simulations with 1 Mpc, 32 Mpc, 256 Mpc and 1024 Mpc box sizes. In dimensionless units the simulations differ only for the initial power spectrum of density perturbations. I compare the profiles when the most massive halos are composed of about 10^5 DM particles. The DM density profiles of the halos in the 1 Mpc box show systematically shallower cores with respect to the corresponding halos in the 32 Mpc simulation that have masses, M_{dm}, typical of the Milky Way and are fitted by a NFW profile. The DM density profiles of the halos in the 256 Mpc box are consistent with having steeper cores than the corresponding halos in the 32 Mpc simulation, but higher mass resolution simulations are needed to strengthen this result. Combined, these results indicate that the density profile of DM halos is not universal, presenting shallower cores in dwarf galaxies and steeper cores in clusters. Physically the result sustains the hypothesis that the mass function of the accreting satellites determines the inner slope of the DM profile. In comoving coordinates, r, the profile ρ_{dm} \propto 1/(X^α(1+X)^{3-α}), with X=c_Δr/r_Δ, r_Δis the virial radius and α=α(M_{dm}), provides a good fit to all the DM halos from dwarf galaxies to clusters at any redshift with the same concentration parameter c_Δ~ 7. The slope, γ, of the outer parts of the halo appears to depend on the acceleration of the universe: when the scale parameter is a=(1+z)^{-1} < 1, the slope is γ~ 3 as in the NFW profile, but γ~ 4 at a > 1 when Ω_Λ~ 1 and the universe is inflating.[abridged]
description: Accepted for publication in MNRAS. 13 pages, including 11 figures and 2 tables. The revised version has an additional discussion section and work on the velocity dispersion anisotropy
GRAVITY MEETS PRICING TO MARKET: WHAT A COMBINEDMETHOD APPROACH TELLS US ON GERMAN BEER EXPORTS
Creators: name: Dreyer, Heiko
name: Fedoseeva, Svetlana
name: Herrmann, Roland
name: Dreyer, Heiko
name: Fedoseeva, Svetlana
name: Herrmann, Roland
Publisher: name: Unknown
Year: 2016
Subjects: subject: Demand and Price Analysis
subject: International Relations/Trade
subject: Incomplete pass-through
subject: gravity equation
subject: pricing to market
subject: export behaviour
subject: German beer

description: Gravity and pricing to market (PTM) models have been used to elaborate determinants of bilateral trade and export pricing for different countries and branches. Typically, only one of the two methods was chosen. We show in a stepwise approach that a combination of both methods yields novel results on the determinants of exports and export pricing behaviour. For the case of German beer exports, we show that structural differences exist between markets on which exporters apply either PTM or non-PTM strategies. German beer exporters apply PTM strategies, in particular local-currency stabilization, on those markets where imports are very sensitive to exchange-rate changes. Non-PTM strategies, i.e. full exchange-rate transmission, occur on export markets with insensitive reactions. Apart from PTM strategies, German beer exports are strongly dependent on policy variables such as the introduction of the Euro and the partner country’s membership in the EU.
Supplementary material from Altered trophic interactions in warming climates: consequences of predator diet breadth and fitness
Creators: name: Bestion, Elvire
name: Soriano-Redondo, Andrea
name: Cucherousset, Julien
name: Jacob, Staffan
name: White, Joël
name: Zinger, Lucie
name: Fourtune, Lisa
name: Gesu, Lucie Di
name: Teyssier, Aimeric
name: Cote, Julien
Publisher: name: The Royal Society
Year: 2019
Subjects: subject: Ecology
subject: FOS: Biological sciences

description: Contains 5 sections, S1: impacts of climate change on invertebrate stable isotope values, S2: path analysis, S3: sensitivity analysis, S4: effect on gut microbiota, S5: effect of lizard diet on prey communities
Bergman Kernels of Elementary Reinhardt Domains
Creators: name: Chakrabarti, Debraj
name: Konkel, Austin
name: Mainkar, Meera
name: Miller, Evan
Publisher: name: arXiv
Year: 2019
Subjects: subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 32A25, 32A07

description: We study the Bergman kernel of certain domains in $\mathbb{C}^n$, called elementary Reinhardt domains, generalizing the classical Hartogs triangle. For some elementary Reinhardt domains, we explicitly compute the kernel, which is a rational function of the coordinates. For some other such domains, we show that the kernel is not a rational function. For a general elementary Reinhardt domain, we obtain a representation of the kernel as an infinite series.
description: Typos corrected. To appear in Pacific Journal of Mathematics
Sodium Ion Conductivity in Superionic IL-Impregnated Metal-Organic Frameworks: Enhancing Stability Through Structural Disorder
Creators: name: Nozari, Vahid
name: Calahoo, Courtney
name: Tuffnell, Joshua M.
name: Adelhelm, Philipp
name: Wondraczek, Katrin
name: Dutton, Siân E.
name: Bennett, Thomas D.
name: Wondraczek, Lothar
Publisher: name: Apollo - University of Cambridge Repository
Year: 2020
Subjects: Article
/639/638/298
/639/301
/639/301/299
/128
article

description: Abstract: Metal-organic frameworks (MOFs) are intriguing host materials in composite electrolytes due to their ability for tailoring host-guest interactions by chemical tuning of the MOF backbone. Here, we introduce particularly high sodium ion conductivity into the zeolitic imidazolate framework ZIF-8 by impregnation with the sodium-salt-containing ionic liquid (IL) (Na0.1EMIM0.9)TFSI. We demonstrate an ionic conductivity exceeding 2 × 10−4 S · cm−1 at room temperature, with an activation energy as low as 0.26 eV, i.e., the highest reported performance for room temperature Na+-related ion conduction in MOF-based composite electrolytes to date. Partial amorphization of the ZIF-backbone by ball-milling results in significant enhancement of the composite stability towards exposure to ambient conditions, up to 20 days. While the introduction of network disorder decelerates IL exudation and interactions with ambient contaminants, the ion conductivity is only marginally affected, decreasing with decreasing crystallinity but still maintaining superionic behavior. This highlights the general importance of 3D networks of interconnected pores for efficient ion conduction in MOF/IL blends, whereas pore symmetry is a less stringent condition.
Relationship Between Partial and Total Responses to Advertising with Application to U.S. Meats
Creators: name: Kinnucan, Henry W.
name: Myrland, Oystein
name: Kinnucan, Henry W.
name: Myrland, Oystein
Publisher: name: Unknown
Year: 2002
Subjects: subject: Livestock Production/Industries
subject: Marketing
subject: FOS: Economics and business
subject: advertising bans
subject: Dorfman-Steiner theorem
subject: generic advertising
subject: total elasticities

description: Buse’s concept of total response is extended to advertising effects. Results suggest that partial advertising elasticities overstate advertising’s ability to increase market demand. One implication is that advertising bans (e.g., for alcohol and tobacco) are apt to be less effective than indicated by partial advertising elasticities estimated from econometric models. Extending the concept of total response to price effects, the total advertising “flexibility” sets the lower bound on the optimal advertising-sales ratio and subsumes the Dorfman-Steiner and Nerlove-Waugh theorems as special cases. Applying the total flexibility concept to U.S. meats, results suggest the beef, pork and poultry industries are under-investing in advertising. However, in the case of beef this conclusion hinges on the assumption that retaliation by pork brand advertisers is minimal, which needs to be tested.
Can Short-Range Interactions Mediate a Bose Metal Phase in 2D?
Creators: name: Phillips, Philip
name: Dalidovich, Denis
Publisher: name: arXiv
Year: 2001
Subjects: subject: Condensed Matter (cond-mat)
subject: FOS: Physical sciences

description: We show here based on a 1-loop scaling analysis that short-range interactions are strongly irrelevant perturbations near the insulator-superconductor (IST) quantum critical point. The lack of any proof that short-range interactions mediate physics which is present only in strong coupling leads us to conclude that short-range interactions are strictly irrelevant near the IST quantum critical point. Hence, we argue that no new physics, such as the formation of a uniform Bose metal phase can arise from an interplay between on-site and nearest-neighbour interactions.
description: 3 pages, 1 .eps file. SUbmitted to Phys. Rev. B