cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Massive MIMO Transmission for LEO Satellite Communications
Creators: name: You, Li
name: Li, Ke-Xin
name: Wang, Jiaheng
name: Gao, Xiqi
name: Xia, Xiang-Gen
name: Ottersten, Björn
Publisher: name: arXiv
Year: 2020
Subjects: subject: Information Theory (cs.IT)
subject: Signal Processing (eess.SP)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Low earth orbit (LEO) satellite communications are expected to be incorporated in future wireless networks, in particular 5G and beyond networks, to provide global wireless access with enhanced data rates. Massive MIMO techniques, though widely used in terrestrial communication systems, have not been applied to LEO satellite communication systems. In this paper, we propose a massive MIMO transmission scheme with full frequency reuse (FFR) for LEO satellite communication systems and exploit statistical channel state information (sCSI) to address the difficulty of obtaining instantaneous CSI (iCSI) at the transmitter. We first establish the massive MIMO channel model for LEO satellite communications and simplify the transmission designs via performing Doppler and delay compensations at user terminals (UTs). Then, we develop the low-complexity sCSI based downlink (DL) precoder and uplink (UL) receiver in closed-form, aiming to maximize the average signal-to-leakage-plus-noise ratio (ASLNR) and the average signal-to-interference-plus-noise ratio (ASINR), respectively. It is shown that the DL ASLNRs and UL ASINRs of all UTs reach their upper bounds under some channel condition. Motivated by this, we propose a space angle based user grouping (SAUG) algorithm to schedule the served UTs into different groups, where each group of UTs use the same time and frequency resource. The proposed algorithm is asymptotically optimal in the sense that the lower and upper bounds of the achievable rate coincide when the number of satellite antennas or UT groups is sufficiently large. Numerical results demonstrate that the proposed massive MIMO transmission scheme with FFR significantly enhances the data rate of LEO satellite communication systems. Notably, the proposed sCSI based precoder and receiver achieve the similar performance with the iCSI based ones that are often infeasible in practice.
description: 31 pages, 4 figures
Type IIB tensionless superstrings in a pp-wave background
Creators: name: Bredthauer, Andreas
name: Lindstrom, Ulf
name: Persson, Jonas
name: Wulff, Linus
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We solve the tensionless string in a constant plane wave background and obtain a hugely degenerate spectrum. This is the case for a large class of plane wave backgrounds. We show that the solution can also be derived as a consistent limit of the quantized tensile theory of IIB strings in a pp-wave. This is in contrast to the situation for several other backgrounds.
description: 1+17 pages, LaTeX, minor corrections, added new references
Agrilus aculeatus Gory 1841
Creators: name: Curletti, Gianfranco
name: Migliore, Letizia
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Buprestidae
Agrilus
Agrilus aculeatus

description: Agrilus aculeatus Gory, 1841
 Agrilus aculeatus Gory, 1841: 210.
 Material examinado: Estac. R.d.S. – E.S. P. 1 ex., Kerremans det.
description: Published as part of Curletti, Gianfranco & Migliore, Letizia, 2014, O gênero Agrilus Curtis, 1829 nas coleções do Museu de Zoologia da Universidade de São Paulo (Coleoptera: Buprestidae), pp. 81-106 in Papéis Avulsos de Zoologia (São Paulo) (São Paulo) 54 (8) on page 100, DOI: 10.1590/0031-1049.2014.54.08, http://zenodo.org/record/4656297
Pressure-induced inverse order-disorder transition in double perovskites
Creators: name: Deng, Zheng
name: Kang, Chang-Jong
name: Croft, Mark
name: Li, Wenmin
name: Shen, Xi
name: Zhao, Jianfa
name: Yu, Richeng
name: Jin, Changqing
name: Kotliar, Gabi
name: Liu, Sizhan
name: Tyson, T. A.
name: Tappero, Ryan
name: Greenblatt, Martha
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Given the consensus that pressure improves cation order in most of known materials, a discovery of pressure-induced disorder could require reconsideration of order-disorder transition in solid state physics/chemistry and geophysics. Double perovskites Y2CoIrO6 and Y2CoRuO6 synthesized at ambient pressure show B-site order, while the polymorphs synthesized at 6 and 15 GPa are partially-ordered and disordered respectively. With the decrease of ordering degrees, the lattices are shrunken and the crystal structures alter from monoclinic to orthorhombic symmetry. Correspondingly, long-range ferrimagnetic order in the B-site ordered phases are gradually overwhelmed by B-site disorder. Theoretical calculations suggest that unusual unit cell compressions under external pressures unexpectedly stabilize the disordered phases of Y2CoIrO6 and Y2CoRuO6.
description: 12 pages, 4 figures, 1 table
The Transmission of Monetary Policy Shocks
Creators: name: Miranda-Agrippino, Silvia
name: Ricco, Giovanni
name: Miranda-Agrippino, Silvia
name: Ricco, Giovanni
Publisher: name: Unknown
Year: 2017
Subjects: subject: Financial Economics
subject: Monetary Policy
subject: Local Projections
subject: VARs
subject: Expectations
subject: Information Rigidity
subject: Survey Forecasts
subject: External Instruments

description: Despite years of research, there is still uncertainty around the effects of monetary policy shocks. We reassess the empirical evidence by combining a new identification that accounts for informational rigidities, with a flexible econometric method robust to misspecifications that bridges between VARs and Local Projections. We show that most of the lack of robustness of the results in the extant literature is due to compounding unrealistic assumptions of full information with the use of severely misspecified models. Using our novel methodology, we find that a monetary tightening is unequivocally contractionary, with no evidence of either price or output puzzles.
Gender-based violence: Experiences from two tertiary care settings in Sri Lanka
Creators: name: Dasuni Pathiraja
name: Ramya Pathiraja
name: Lakshmen Senanayake
name: Mapitigama, Nethanjalie
name: Edirisinghe, Rukshani
Publisher: name: figshare
Year: 2020
Subjects: subject: 111708 Health and Community Services
subject: FOS: Health sciences

description: Retrospective cross-sectional study The individual records maintained on all care seekers who had attended these two centers during the study period were perused.Data were extracted by trained research assistants, entered into data collection sheets, subsequently entered into anongoing password-protected database and stored confidentially.The following variables were analyzedSociodemographic details of care seekers, referral methods, types of violence experienced and their consequences, factors associated with GBV, the characteristics of the perpetrator, health seeking behavior of those seeking care, and the services provided, were obtained from the hospital records. 
Verification of He-3 proportional counters fast neutron sensitivity through a comparison with He-4 detectors
Creators: name: Piscitelli, Francesco
name: Mauri, Giacomo
name: Laloni, Alessio
name: Hall-Wilton, Richard
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: In the field of neutron scattering science, a large variety of instruments require detectors for thermal and cold neutrons. Helium-3 has been one of the main actors in thermal and cold neutron detection for many years. Nowadays neutron facilities around the world are pushing their technologies to increase the available flux delivered at the instruments, this enables a completely new science landscape. Complementary with the increasing available flux, a better signal-to-background ratio (S/B) enables to perform new types of measurements. To this aim, this manuscript re-examines the background sensitivity of today's "gold standard" neutron detection. Fast neutrons and gamma-rays are the main background species in neutron scattering experiments. The efficiency (sensitivity) of detecting fast neutrons, cosmic rays and gamma-rays, for a Helium-3-based detector is studied here through the comparison with Helium-4 counters. The comparison to Helium-4 allows to separate the thermal (and cold) neutron to the fast neutron contributions in Helium-3-based counters, which are otherwise entangled; verifying previous results from an indirect method. A relatively high sensitivity is found. Moreover, an estimate for the cosmic neutron fluence, also a source of background, at ground level at ESS is presented in this manuscript.
description: 16 pages, 8 figures
Endoreversible Otto engines at maximal power
Creators: name: Smith, Zackary
name: Pal, P. S.
name: Deffner, Sebastian
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Despite its idealizations, thermodynamics has proven its power as a predictive theory for practical applications. In particular, the Curzon-Ahlborn efficiency provides a benchmark for any real engine operating at maximal power. Here we further develop the analysis of endoreversible Otto engines. For a generic class of working mediums, whose internal energy is proportional to some power of the temperature, we find that no engine can achieve the Carnot efficiency at finite power. However, we also find that for the specific example of photonic engines the efficiency at maximal power is larger than the Curzon-Ahlborn efficiency.
description: 6 pages, 1 figure;
Additional file 1 of Upper limb dimensions in adults presenting for elective surgery – implications for blood pressure measurement
Creators: name: Chow, Christopher
name: Ceglowski, Peter
name: Lehane, Katie
name: Pelecanos, Anita
name: Wren, Kellie
name: Eley, Victoria A.
Publisher: name: figshare
Year: 2020
Subjects: subject: Space Science
subject: Medicine
subject: Pharmacology
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy

description: Additional file 1 : Figure S1. Survey questions answered by participants, relating to their experience of having their blood pressure measured.
Hund's rule and metallic ferromagnetism
Creators: name: Froehlich, Juerg
name: Ueltschi, Daniel
Publisher: name: arXiv
Year: 2004
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We study tight-binding models of itinerant electrons in two different bands, with effective on-site interactions expressing Coulomb repulsion and Hund's rule. We prove that, for sufficiently large on-site exchange anisotropy, all ground states show metallic ferromagnetism: They exhibit a macroscopic magnetization, a macroscopic fraction of the electrons is spatially delocalized, and there is no energy gap for kinetic excitations.
description: 17 pages
Entailments in quantitative separation logic with recursive definitions: constructing cyclyc proofs
Creators: name: Nossol, Patrick
Publisher: name: RWTH Aachen University
Year: 2024

description: Masterarbeit, RWTH Aachen University, 2024; Aachen : RWTH Aachen University 1 Online-Ressource: Illustrationen (2024). = Masterarbeit, RWTH Aachen University, 2024
description: Automatically proving the correctness of programs utilizing dynamic memory is an ongoing research topic. Since generally, programs include many different programming paradigms affecting memory such as recursion and mutually shared memory, there exist multiple logics modeling the affects of these paradigms. With Quantitative Separation Logic (QSL), we are able to argue about quantitative properties of memory configurations by evaluating formulae to non negative real numbers. Among other things, formulae can thus formalize properties over probabilities of a desired program’s output or sizes of data structures. For the entailment problem in QSL, that is checking whether the evaluations of two formulae satisfy an inequality constraint, we construct formal proofs on bounds of the described properties. We use recursive definitions as elements of QSL to model unbounded data structures like lists and their sizes, which appear in many programs. Additional complications in proofs arise with regard to the unbounded nature of these recursive definitions. Cyclic proofs provide a tool with which to construct sound proofs for entailments containing recursive definitions with infinite, cyclic paths via the principle of infinite descent. In this thesis, we derive inference rules for reasoning in a fragment of QSL that contains supremal quantifiers and sums over formulae more expressive than quantitative, symbolic heaps. We then define and prove the soundness of a cyclic proof system in QSL as an instantiation of the abstract proof system Cyclist. Moreover, we have implemented this proof system for our QSL fragment and discuss experimental results. Our implementation is able to prove entailments in the given fragment of QSL which, to our knowledge, no other automatic proof system can prove thus far.
description: Published by RWTH Aachen University, Aachen
Taxes and the Location of Targets
Creators: name: Arulampalam, Wiji
name: Devereux, Michael P.
name: Liberini, Federica
name: Arulampalam, Wiji
name: Devereux, Michael P.
name: Liberini, Federica
Publisher: name: Unknown
Year: 2017
Subjects: subject: Financial Economics
subject: Multinational enterprises
subject: cross-border expansion
subject: target choice
subject: corporation income tax
subject: mixed logit

description: We use firm-level data to investigate the impact of taxes on the international location of targets in M&A allowing for heterogeneous responses by companies. The statutory tax rate in the target country is found to have a negative impact on the probability of an acquisition in that country. In addition, the estimated size of the effect is found to depend on whether (i) acquirer is a domestic or a multinational enterprise; (ii) the acquisition is domestic or cross-border; and (iii) the acquirer’s country has a worldwide or territorial tax system.
Gravitational waves from r-mode instability of massive young sub- and super-Chandrasekhar white dwarfs
Creators: name: Mukhopadhyay, Somnath
name: Banik, Sarmistha
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: In the present work we investigate the r-mode instability windows, spindown and spindown rates of sub- and super-Chandrasekhar magnetized white dwarfs in presence of Landau quantization of the electron gas and magnetic braking. The gravitational wave strain amplitudes due to r-mode instability is also calculated. The dominant damping mechanism is taken to be the shear viscosity arising due to scattering of the degenerate electrons from the ion liquid. We find that the critical frequencies of Landau quantized magnetized white dwarfs are the lowest, those of non-Landau quantized ones are higher and those of non-magnetized ones are the highest at the same temperature. This implies that magnetic braking and Landau quantization both enhance r-mode instability. We have also seen that there is rapid spindown of magnetized white dwarfs due to additional magnetic braking term but there is no considerable effect of Landau quantization on the spindown and spindown rates for magnetic field strengths relevant for white dwarf interiors. We find that the r-mode gravitational wave strain amplitude for a rapidly rotating super-Chandrasekhar white dwarf at 1 kpc is $\sim 10^{-27}$, making isolated massive rapidly rotating hot magnetized white dwarfs prime candidates for search of gravitational waves in the future.
Secrecy and State Capacity: A Look Behind the Iron Curtain
Creators: name: Harrison, Mark
name: Harrison, Mark
Publisher: name: Unknown
Year: 2017
Subjects: subject: Financial Economics
subject: abuse of authority
subject: adverse selection
subject: censorship
subject: military outlays
subject: secrecy
subject: state capacity
subject: transaction costs
subject: trust

description: This paper reviews two decades of research on the political economy of secrecy, based on the records of former Soviet state and party archives. Secrecy was an element of Soviet state capacity, particularly its capacity for decisiveness, free of the pressures and demands for accountability that might have arisen from a better informed citizenry. But secrecy was double-edged. Its uses also incurred substantial costs that weakened the capacity of the Soviet state to direct and decide. The paper details the costs of secrecy associated with “conspirative” government business processes, adverse selection of management personnel, everyday abuses of authority, and an uninformed leadership.
The Role of Money in Federal Reserve Policy
Creators: name: Qureshi, Irfan
name: Qureshi, Irfan
Publisher: name: Unknown
Year: 2016
Subjects: subject: Financial Economics
subject: Taylor rule
subject: policy objectives
subject: money aggregates
subject: macroeconomic stability

description: Is the classic Taylor rule misspecified? I show that the inability of the Taylor rule to explain the federal funds rate using real-time data stems from the omission of a money growth objective. I highlight the significant role played by money in the policy discourse during the Volcker-Greenspan era using new FOMC data, benchmarking a novel characterization of “good” policy. An application of this framework offers a unified policy-based explanation of the Great Moderation and Recession. Welfare analysis based on the New-Keynesian model endorses the rule with money. The evidence raises significant concerns about relying on the simple Taylor rule as a policy benchmark and suggests why money may serve as a useful indicator in guiding future monetary policy decisions.
Agrilus caroli Kerremans 1903
Creators: name: Curletti, Gianfranco
name: Migliore, Letizia
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Buprestidae
Agrilus
Agrilus caroli

description: Agrilus caroli Kerremans, 1903
 Agrilus caroli Kerremans, 1903: 273.
 Material examinado: 1 ex., Cótipo.
description: Published as part of Curletti, Gianfranco & Migliore, Letizia, 2014, O gênero Agrilus Curtis, 1829 nas coleções do Museu de Zoologia da Universidade de São Paulo (Coleoptera: Buprestidae), pp. 81-106 in Papéis Avulsos de Zoologia (São Paulo) (São Paulo) 54 (8) on page 102, DOI: 10.1590/0031-1049.2014.54.08, http://zenodo.org/record/4656297
Tax Revenues, Development, and the Fiscal Cost of Trade Liberalization, 1792-2006
Creators: name: Cage, Julia
name: Gadenne, Lucie
name: Cage, Julia
name: Gadenne, Lucie
Publisher: name: Unknown
Year: 2016
Subjects: Financial Economics

description: This paper documents the fiscal cost of trade liberalization: the extent to which countries are able to recover the trade tax revenues lost from liberalizing trade by increasing tax revenues from other sources. Using a novel dataset on government revenues over the period 1792-2006 we compare the fiscal impact of trade liberalization in developing countries and in today’s rich countries at earlier stages of development. We find that trade liberalization episodes led to larger and longer-lived decreases in total tax revenues in developing countries since the 1970s than in rich countries in the 19th and early 20th centuries. Half the developing countries in our sample experience a fall in total tax revenues that lasts more than ten years after an episode. Results are similar when we consider government expenditures, suggesting decreases in trade tax revenues negatively affect governments’ capacity to provide public services in many developing countries.
Neutrino and $Z'$ phenomenology in an anomaly-free $\mathbf{U}(1)$ extension: role of higher-dimensional operators
Creators: name: Choudhury, Debajyoti
name: Deka, Kuldeep
name: Mandal, Tanumoy
name: Sadhukhan, Soumya
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider an anomaly-free $\mathrm{U}(1)$ extension of the Standard Model with three right-handed neutrinos (RHNs) and two complex scalars, wherein the charge assignments preclude all tree-level mass terms for the neutrinos. Considering this setup, in turn, to be only a low-energy effective theory, we introduce higher-dimensional terms {\em a la} Froggatt-Nielsen to naturally generate tiny neutrino masses. One of the RHNs turns out to be very light, thereby constituting the main decay mode for the $Z'$ and hence relaxing the LHC dilepton resonance search constraints. This very RHN has a lifetime comparable to or bigger than the age of the Universe, and, hence, could account for a non-negligible fraction of the dark matter.
Submillimeter Array 440$μ$m/690GHz line and continuum observations of Orion-KL
Creators: name: Beuther, H.
name: Zhang, Q.
name: Reid, M. J.
name: Hunter, T. R.
name: Gurwell, M.
name: Wilner, D.
name: Zhao, J. -H.
name: Shinnaga, H.
name: Keto, E.
name: Ho, P. T. P.
name: Moran, J. M.
name: Liu, S. -Y.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Submillimeter Array observations of Orion-KL at 1'' resolution in the 440mu/690GHz band reveal new insights about the continuum and line emission of the region. The 440mu continuum flux density measurement from source I allows us to differentiate among the various proposed physical models: Source I can be well modeled by a ``normal'' protostellar SED consisting of a proton-electron free-free emission component at low frequencies and a strong dust component in the submillimeter bands. Furthermore, we find that the protostellar object SMA1 is clearly distinct from the hot core. The non-detection of SMA1 at cm and infrared wavelengths suggests that it may be one of the youngest sources in the entire Orion-KL region. The molecular line maps show emission mainly from the sources I, SMA1 and the hot core peak position. An analysis of the CH$3CN(37_K-36_K) K-ladder (K=0...3) indicates a warm gas component of the order 600+-200K. In addition, we detect a large fraction (~58%) of unidentified lines and discuss the difficulties of line identifications at these frequencies.
description: 13 pages, 8 figures, accepted for ApJ, sched. v.636 January 2006, higher resolution version available at http://www.mpia-hd.mpg.de/homes/beuther
Single Graviton Loop Contribution to the Self-Mass of a Massless, Conformally Coupled Scalar on de Sitter Background
Creators: name: Glavan, D.
name: Miao, S. P.
name: Prokopec, T.
name: Woodard, R. P.
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We use a simplified formalism to re-compute the single graviton loop contribution to the self-mass of a massless, conformally coupled scalar on de Sitter background which was originally made by Boran, Kahya and Park [1-3]. Our result resolves the problem with the flat space correspondence limit that was pointed out by Fröb [4]. We discuss how this computation will be used in a long-term project to purge the linearized effective field equation of gauge dependence.
description: 26 pages, 1 figure, uses LaTeX 2e. Version 2 revised slightly for publication
Creating A “Meet your Farmer Event” at UBC Food Service’s Place Vanier Residence Cafeteria
Creators: name: Chu, Nikita
name: Chui, Nigel
name: Hsu, Laura
name: Nakagawa, Yuki
name: Tse, Jennifer
Publisher: name: The University of British Columbia
Year: 2010

description: Disclaimer: “UBC SEEDS provides students with the opportunity to share the findings of their studies, as well as their opinions, conclusions and recommendations with the UBC community. The reader should bear in mind that this is a student project/report and is not an official document of UBC. Furthermore readers should bear in mind that these reports may not reflect the current status of activities at UBC. We urge you to contact the research persons mentioned in a report or the SEEDS Coordinator about the current status of the subject matter of a project/report.”
title: High Resolution Gene Expression Analysis in the Human Retina
Creators: name: Trifunović, Dragana
Publisher: name: The Open University
Year: 2008

description: Inherited retinal disorders are characterized by a remarkable genetic heterogeneity; so far, over 160 genes have been identified as responsible for this kind of diseases. Nevertheless, it is believed that the total number of retinal disease genes is much higher then what is currently known. Central to the first part of this PhD thesis was to identify new candidate genes for retinal disorders. The approach used to achieve this goal was based on in silico prediction of genes with exclusive or predominant retinal expression in human retina, followed by experimental verification of their predicted expression by both RT-PCR and RNA in situ hybridization. The work carried out for this part of the thesis provided a list of new candidate disease genes for inherited retinal disorders.

The second part of this PhD project aimed at the generation of a high resolution gene expression atlas of retinitis pigmentosa (RP) genes in human and murine retina. RP is one of the leading causes of visual handicap in the world population. The study of the disease mechanisms and the development of efficient therapeutic approaches have mostly relied on the availability of animal models for this condition, so far. Nevertheless, little information is available about the RNA expression profiles of RP genes in the human retina. To overcome this lack of information, I generated the first gene expression atlas of 34 known RP genes in human and murine retinas. Differences observed in the expression patterns of some genes in human and mouse will open new perspectives on the function of these genes and on their putative roles in disease pathogenesis.
Tax Me, But Spend Wisely? Sources of Public Finance and Government Accountability
Creators: name: Gadenne, Lucie
name: Gadenne, Lucie
Publisher: name: Unknown
Year: 2016
Subjects: Financial Economics

description: Existing evidence suggests that extra grant revenues lead to little improvements in public services in developing countries - but would governments spend tax revenues differently? This paper considers a program that invests in the tax capacity of Brazilian municipalities. Using variations in the timing of program uptake I find that it raises local tax revenues and that the increase in taxes is used to improve both the quantity and quality of municipal education infrastructure. In contrast increases in grants over which municipalities have the same discretion as over taxes have no impact on any measure of local public infrastructure. These results suggest that the way governments are financed matters: governments spend increases in tax revenues more towards expenditures that benefit citizens than increases in grant revenues.
Honing and proofing Astrophysical codes on the road to Exascale. Experiences from code modernization on many-core systems
Creators: name: Cielo, Salvatore
name: Iapichino, Luigi
name: Baruffa, Fabio
name: Bugli, Matteo
name: Federrath, Christoph
Publisher: name: arXiv
Year: 2020
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Performance (cs.PF)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences
subject: C.0; D.4.8; J.0; J.2

description: The complexity of modern and upcoming computing architectures poses severe challenges for code developers and application specialists, and forces them to expose the highest possible degree of parallelism, in order to make the best use of the available hardware. The Intel$^{(R)}$ Xeon Phi$^{(TM)}$ of second generation (code-named Knights Landing, henceforth KNL) is the latest many-core system, which implements several interesting hardware features like for example a large number of cores per node (up to 72), the 512 bits-wide vector registers and the high-bandwidth memory. The unique features of KNL make this platform a powerful testbed for modern HPC applications. The performance of codes on KNL is therefore a useful proxy of their readiness for future architectures. In this work we describe the lessons learnt during the optimisation of the widely used codes for computational astrophysics P-Gadget-3, Flash and Echo. Moreover, we present results for the visualisation and analysis tools VisIt and yt. These examples show that modern architectures benefit from code optimisation at different levels, even more than traditional multi-core systems. However, the level of modernisation of typical community codes still needs improvements, for them to fully utilise resources of novel architectures.
description: 16 pages, 10 figures, 4 tables. To be published in Future Generation of Computer Systems (FGCS), Special Issue on "On The Road to Exascale II: Advances in High Performance Computing and Simulations"
Cereals, Appropriability and Hierarchy
Creators: name: Mayshar, Joram
name: Moavz, Omer
name: Neeman, Zvika
name: Pascali, Luigi
name: Mayshar, Joram
name: Moavz, Omer
name: Neeman, Zvika
name: Pascali, Luigi
Publisher: name: Unknown
Year: 2016
Subjects: subject: Financial Economics
subject: Geography
subject: Hierarchy
subject: Institutions
subject: State Capacity

description: We propose that the development of social hierarchy following the Neolithic Revolution was due to the ability of the emergent elite to appropriate crops from farmers, rather than a result of increased productivity, as usually maintained. Since cereals are easier to appropriate than roots and tubers, we argue that regional variations in the suitability of land for the cultivation of these di§erent crop types can account for di§erences in the formation of hierarchies and states. Our empirical investigation supports a causal e§ect of the cultivation of cereals on hierarchy, and the lack of a similar e§ect of land productivity.
Traps for pinning and scattering of antiferromagnetic skyrmions via magnetic properties engineering
Creators: name: Toscano, D.
name: Santece, I. A.
name: Guedes, R. C. O.
name: Assis, H. S.
name: Miranda, A. L. S.
name: de Araujo, C. I. L.
name: Sato, F.
name: Coura, P. Z.
name: Leonel, S. A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Micromagnetic simulations have been performed to investigate the controllability of the skyrmion position in antiferromagnetic nanotracks with their magnetic properties modified spatially. In this study we have modeled magnetic defects as local variations on the material parameters, such as the exchange stiffness, saturation magnetization, perpendicular magnetocrystalline anisotropy and Dzyaloshinskii-Moriya constant. Thus, we have observed not only pinning (potential well) but also scattering (potential barrier) of antiferromagnetic skyrmions, when adjusting either a local increase or a local reduction for each material parameter. In order to control of the skyrmion motion it is very important to impose certain positions along the nanotrack where the skyrmion can stop. Magnetic defects incorporated intentionally in antiferromagnetic racetracks can be useful for such purpose. In order to provide guidelines for experimental studies, we vary both material parameters and size of the modified region. The found results show that the efficiency of skyrmion trap depends on a suitable combination of magnetic defect parameters. Furthermore, we discuss the reason why skyrmions are either attracted or repelled by a region magnetically modified.
description: arXiv admin note: substantial text overlap with arXiv:1810.03754
Agrilus decoloratus subsp. alazon Lewis 1893
Creators: name: Curletti, Gianfranco
name: Migliore, Letizia
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Buprestidae
Agrilus
Agrilus decoloratus
Agrilus decoloratus ssp. alazon lewis, 1893

description: Agrilus decoloratus ssp. alazon Lewis, 1893
 Agrilus decoloratus ssp. alazon Lewis, 1893: 213.
 Material examinado: JAPÃO, Kiushu, 1 ex.
description: Published as part of Curletti, Gianfranco & Migliore, Letizia, 2014, O gênero Agrilus Curtis, 1829 nas coleções do Museu de Zoologia da Universidade de São Paulo (Coleoptera: Buprestidae), pp. 81-106 in Papéis Avulsos de Zoologia (São Paulo) (São Paulo) 54 (8) on page 102, DOI: 10.1590/0031-1049.2014.54.08, http://zenodo.org/record/4656297
Wiedemann-Franz violation in the vortex state of a d-wave superconductor
Creators: name: Kim, Wonkee
name: Marsiglio, F.
name: Carbotte, J. P.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We show that the Wiedemann-Franz law is violated in the vortex state of a d-wave superconductor at zero temperature. We use a semiclassical approach, which includes the Doppler shift on the quasiparticles as well as the Andreev scattering from a random distribution of vortices. We also show that the vertex corrections to the electrical conductivity due to the anisotropy of impurity scattering become unimportant in the presence of a sufficiently large magnetic field.
description: To be published in Physica C as a proceeding of M2S-HTSC Rio 2003
Additional file 1 of Low-dose human menopausal gonadotrophin versus natural cycles in intrauterine insemination for subfertile couples with regular menstruation
Creators: name: Sichen Li
name: Yuxia He
name: Mingzhu Cao
name: Hanyan Liu
name: Jianqiao Liu
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Cell Biology
subject: Physiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Cancer

description: Additional file 1: Table S1. Clinical pregnancy (including intrauterine pregnancy and ectopic pregnancy) follow-up of twin and singleton pregnancy. Table S2. Intrauterine twin and singleton pregnancy (excluding ectopic pregnancy). Table S3.Follow-up of live birth in twin and singleton pregnancy.
Influence of Bubbles on the Energy Conversion Efficiency of Electrochemical Reactors
Creators: name: Angulo, Andrea
name: van der Linde, Peter
name: Gardeniers, Han
name: Modestino, Miguel
name: Rivas, David Fernández
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Bubbles are known to influence energy and mass transfer in gas evolving electrodes. However, we lack a detailed understanding on the intricate dependencies between bubble evolution processes and electrochemical phenomena. This review discusses our current knowledge on the effects of bubbles on electrochemical systems with the aim to identify opportunities and motivate future research in this area. We first provide a base background on the physics of bubble evolution as it relates to electrochemical processes. Then we outline how bubbles affect energy efficiency of electrode processes, detailing the bubble-induced impacts on activation, ohmic and concentration overpotentials. Lastly, we describe different strategies to mitigate losses and how to exploit bubbles to enhance electrochemical reactions.
description: Joule(2020)
Supplement to Fuzzy Differences-in-Differences
Creators: name: De Chaisemartin, Clement
name: D'Haultfoeuille, Xavier
name: De Chaisemartin, Clement
name: D'Haultfoeuille, Xavier
Publisher: name: Unknown
Year: 2015
Subjects: Financial Economics

description: This paper gathers the supplementary material to de Chaisemartin & D'Haultf÷uille (2015). First, we show that two commonly used IV and OLS regressions with time and group xed eects estimate weighted averages of Wald-DIDs. It then follows from Theorem 3.1 in de Chaisemartin & D'Haultf÷uille (2015) that these regressions estimate weighted sums of LATEs, with potentially many negative weights as we illustrate through two applications. We review all papers published in the American Economic Review between 2010 and 2012 and nd that 10.1% of these papers estimate one or the other regression. Second, we consider estimators of the bounds on average and quantile treatment eects derived in Theorems 3.2 and 3.3 in de Chaisemartin & D'Haultf÷uille (2015) and we study their asymptotic behavior. Third, we revisit Gentzkow et al. (2011) and Field (2007) using our estimators. Finally, we present all the remaining proofs not included in the main paper.
The Zeeman effect in the G band
Creators: name: Uitenbroek, H.
name: Miller-Ricci, E.
name: Ramos, A. Asensio
name: Bueno, J. Trujillo
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We investigate the possibility of measuring magnetic field strength in G-band bright points through the analysis of Zeeman polarization in molecular CH lines. To this end we solve the equations of polarized radiative transfer in the G band through a standard plane-parallel model of the solar atmosphere with an imposed magnetic field, and through a more realistic snapshot from a simulation of solar magneto-convection. This region of the spectrum is crowded with many atomic and molecular lines. Nevertheless, we find several instances of isolated groups of CH lines that are predicted to produce a measurable Stokes V signal in the presence of magnetic fields. In part this is possible because the effective Landé factors of lines in the stronger main branch of the CH A$^{2}Δ$--X$^{2}Π$ transition tend to zero rather quickly for increasing total angular momentum $J$, resulting in a Stokes $V$ spectrum of the G band that is less crowded than the corresponding Stokes $I$ spectrum. We indicate that, by contrast, the effective Landé factors of the $R$ and $P$ satellite sub-branches of this transition tend to $\pm 1$ for increasing $J$. However, these lines are in general considerably weaker, and do not contribute significantly to the polarization signal. In one wavelength location near 430.4 nm the overlap of several magnetically sensitive and non-sensitive CH lines is predicted to result in a single-lobed Stokes $V$ profile, raising the possibility of high spatial-resolution narrow-band polarimetric imaging. In the magneto-convection snapshot we find circular polarization signals of the order of 1% prompting us to conclude that measuring magnetic field strength in small-scale elements through the Zeeman effect in CH lines is a realistic prospect.
description: 22 pages, 6 figures. To be published in the Astrophysical Journal
Agrilus anguinus Dejean 1833
Creators: name: Curletti, Gianfranco
name: Migliore, Letizia
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Buprestidae
Agrilus
Agrilus anguinus

description: Agrilus anguinus Dejean, 1833 (nomen nudum)
 Agrilus anguinus Dejean, 1833: 82.
 Material examinado: BRASIL, Minas Gerais, Catas Altas (Serra do Caraça), 1 ex., 27.XI a 05.XII.1972, Expedição do Museu de Zoologia leg.
 O nome Agrilus anguinus, para esta espécie, aparece nos catálogos de Dejean de 1833 e 1837 (p. 93), mas aparentemente sem descrição; por esta razão, a espécie não pode ser considerada válida (art. 12.1 do CINZ).
description: Published as part of Curletti, Gianfranco & Migliore, Letizia, 2014, O gênero Agrilus Curtis, 1829 nas coleções do Museu de Zoologia da Universidade de São Paulo (Coleoptera: Buprestidae), pp. 81-106 in Papéis Avulsos de Zoologia (São Paulo) (São Paulo) 54 (8) on page 83, DOI: 10.1590/0031-1049.2014.54.08, http://zenodo.org/record/4656297
The Star Formation Rate and Dense Molecular Gas in Galaxies
Creators: name: Gao, Yu
name: Solomon, Philip M.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: (abridged) HCN luminosity Lhcn is a tracer of DENSE molecular gas, n(H_2) >~ 3x10^4 cm^{-3}, associated with star-forming giant molecular cloud (GMC) cores. We present the results and analysis of our survey of HCN emission from 65 infrared galaxies including 9 ultraluminous infrared galaxies (ULIGs, Lir>10^{12}Lsun), 22 luminous infrared galaxies (LIGs, 10^{11}
description: ApJ, May 1 issue (final version, 20 pages + 9 figures + 3 tables + appendix/refs.). Please see Gao & Solomon (Paper I, astro-ph/0310341) for the presentation and discussion of the HCN survey
Differentiating Population Spatial Behavior using Representative Features of Geospatial Mobility (ReFGeM)
Creators: name: Zhang, Rui
name: Stanley, Kevin G.
name: Fuller, Daniel
name: Bell, Scott
Publisher: name: arXiv
Year: 2020
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Social and Information Networks (cs.SI)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences
subject: J.4

description: Understanding how humans use and consume space by comparing stratified groups, either through observation or controlled study, is key to designing better spaces, cities, and policies. GPS data traces provide detailed movement patterns of individuals but can be difficult to interpret due to the scale and scope of the data collected. For actionable insights, GPS traces are usually reduced to one or more features which express the spatial phenomenon of interest. However, it is not always clear which spatial features should be employed, and substantial effort can be invested into designing features which may or may not provide insight. In this paper we present an alternative approach: a standardized feature set with actionable interpretations that can be efficiently run against many datasets. We show that these features can distinguish between disparate human mobility patterns, although no single feature can distinguish them alone.
Fuzzy Differences-in-Differences
Creators: name: De Chaisemartin, Clement
name: D'Haultfoeuille, Xavier
name: De Chaisemartin, Clement
name: D'Haultfoeuille, Xavier
Publisher: name: Unknown
Year: 2015
Subjects: subject: Financial Economics
subject: differences-in-differences
subject: changes-in-changes
subject: quantile treatment effects
subject: partial identification
subject: returns to education

description: In many applications of the dierences-in-dierences (DID) method, the treatment increases more in the treatment group, but some units are also treated in the control group. In such fuzzy designs, a popular estimator of treatment eects is the DID of the outcome divided by the DID of the treatment, or OLS and 2SLS regressions with time and group xed eects estimating weighted averages of this ratio across groups. We start by showing that when the treatment also increases in the control group, this ratio estimates a causal eect only if treatment eects are homogenous in the two groups. Even when the distribution of treatment is stable, it requires that the eect of time be the same on all counterfactual outcomes. As this assumption is not always applicable, we propose two alternative estimators. The rst estimator relies on a generalization of common trends assumptions to fuzzy designs, while the second extends the changes-in-changes estimator of Athey & Imbens (2006). When the distribution of treatment changes in the control group, treatment eects are partially identied. Finally, we prove that our estimators are asymptotically normal and use them to revisit applied papers using fuzzy designs.
E-Cigarettes: The Extent and Impact of Complementary Dual-Use
Creators: name: Doyle, Chris
name: Ronayne, David
name: Sgroi, Daniel
name: Doyle, Chris
name: Ronayne, David
name: Sgroi, Daniel
Publisher: name: Unknown
Year: 2015
Subjects: subject: Financial Economics
subject: e-cigarettes
subject: smoking
subject: dual-use
subject: dynamic complements
subject: cost-benefit analysis

description: The highly controversial e-cigarette industry has generated considerable policy debate and mixed regulatory responses worldwide. Surprisingly, an issue that has been largely ignored is the categorisation of e-cigarettes as substitutes or (dynamic) complements for conventional smoking. We conduct an online survey of US participants finding that 37% of e-cigarette users view them primarily as complementary. We use this result along-side publicly available data to calibrate a cost-benefit analysis, estimating that complementarity reduces the potential costsavings of e-cigarettes by as much as 57% (or $3.3-4.9bn p.a.) relative to case with zero complementarity.
Negative Voters: Electoral Competition with Loss-Aversion
Creators: name: Lockwood, Ben
name: Rockey, James
name: Lockwood, Ben
name: Rockey, James
Publisher: name: Unknown
Year: 2015
Subjects: subject: Financial Economics
subject: electoral competition
subject: loss-aversion
subject: incumbency advantage
subject: platform rigidity

description: This paper studies how voter loss-aversion affects electoral competition in a Downsian setting. Assuming that the voters’ reference point is the status quo, we show that loss-aversion has a number of effects. First, for some values of the status quo, there is policy rigidity: both parties choose platforms equal to the status quo, regardless of other parameters. Second, there is a moderation effect when there is policy rigidity, the equilibrium policy outcome is closer to the moderate voters’ ideal point than in the absence of loss-aversion. In a dynamic extension of the model, we consider how parties strategically manipulate the status quo to their advantage, and we find that this decreases policy rigidity and increases moderation. Finally, we show that with loss-aversion, incumbents adjust less than challengers to changes in voter preferences, and as a result, favorable (unfavorable) preference shocks, from the point of view of the incumbent, intensify (reduce) electoral competition. These two predictions are new, and we test them using elections to US state legislatures, where we find empirical support for them.
Off-site-repulsion induced Triplet Superconductivity: a possibility of chiral p$_{x+y}$ pairing in Sr$_2$RuO$_4$
Creators: name: Arita, Ryotaro
name: Onari, Seiichiro
name: Kuroki, Kazuhiko
name: Aoki, Hideo
Publisher: name: arXiv
Year: 2004
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: In order to probe the effect of charge fluctuations on triplet pairing, we study the pairing symmetry in the one-band Hubbard model having the off-site Coulomb repulsion ($V$) on top of the on-site repulsion as a model for the $γ$ band of Sr$_2$RuO$_4$, a strong candidate for triplet pairing superconductor. The result, obtained with the dynamical cluster approximation combined with the quantum Monte-Carlo method, and confirmed from the fluctuation exchange approximation, shows that while $d_{x^2-y^2}$-pairing dominates over $p$ in the absence of $V$, introduction of $V$ makes $p_{x+y}$ and $d_{xy}$ dominant. The gap function for the chiral $p_{x+y}$+i$p_{x-y}$ has nodes that are consistent with the recent measurement of specific heat in rotated magnetic fields in the ruthenate. This suggests that the off-site repulsion may play an essential role in triplet superconductivity in this material.
description: 4 pages, 4 figures, to be published in Phys. Rev. Lett