cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Multi-moment advection scheme in three dimension for Vlasov simulations of magnetized plasma
Creators: name: Minoshima, Takashi
name: Matsumoto, Yosuke
name: Amano, Takanobu
Publisher: name: arXiv
Year: 2012
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: We present an extension of the multi-moment advection scheme (Minoshima et al., 2011, J. Comput. Phys.) to the three-dimensional case, for full electromagnetic Vlasov simulations of magnetized plasma. The scheme treats not only point values of a profile but also its zeroth to second order piecewise moments as dependent variables, and advances them on the basis of their governing equations. Similar to the two-dimensional scheme, the three-dimensional scheme can accurately solve the solid body rotation problem of a gaussian profile with little numerical dispersion or diffusion. This is a very important property for Vlasov simulations of magnetized plasma. We apply the scheme to electromagnetic Vlasov simulations. Propagation of linear waves and nonlinear evolution of the electron temperature anisotropy instability are successfully simulated with a good accuracy of the energy conservation.
description: 28 pages, 10 figures, accepted by the Journal of Computational Physics. arXiv admin note: text overlap with arXiv:1105.3061
HIGH FREQUENCY CLASS E DESIGN
METHODOLOGIES
Creators: name: Colantonio, P.
name: Giannini, F.
name: Giofrè, R.
name: Yarleque Medina, M.A.
name: Schreurs, D.
name: Nauwelaers, B.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2005
Subjects: ING-INF/01 Elettronica

description: We show that the effects of photoinduced screening of the bias field as a function of optical spot shape for ultrafast excitation of photoconductors to generate terahertz radiation using spatially resolve Monte Carlo simulations coupled with a self-consistent Poisson solver. The results of the simulations demonstrate that given the same photoexcited carrier density, a line focus parallel to the direction of the bias field suppresses saturation at high optical fluence due to space-charge screening and enhances the peak terahertz power in the time domain.
A quantum dot close to Stoner instability: the role of Berry's Phase
Creators: name: Saha, Arijit
name: Gefen, Yuval
name: Burmistrov, Igor
name: Shnirman, Alexander
name: Altland, Alexander
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The physics of a quantum dot with electron-electron interactions is well captured by the so called "Universal Hamiltonian" if the dimensionless conductance of the dot is much higher than unity. Within this scheme interactions are represented by three spatially independent terms which describe the charging energy, the spin-exchange and the interaction in the Cooper channel. In this paper we concentrate on the exchange interaction and generalize the functional bosonization formalism developed earlier for the charging energy. This turned out to be challenging as the effective bosonic action is formulated in terms of a vector field and is non-abelian due to the non-commutativity of the spin operators. Here we develop a geometric approach which is particularly useful in the mesoscopic Stoner regime, i.e., when the strong exchange interaction renders the system close the the Stoner instability. We show that it is sufficient to sum over the adiabatic paths of the bosonic vector field and, for these paths, the crucial role is played by the Berry phase. Using these results we were able to calculate the magnetic susceptibility of the dot. The latter, in close vicinity of the Stoner instability point, matches very well with the exact solution [I.S. Burmistrov, Y. Gefen, M.N. Kiselev, JETP Lett. 92 (2010) 179].
description: This is the published version
R&D incentives and market structure: a dynamic analysis
Creators: name: Cellini, Roberto
name: Lambertini, Luca
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2004
Subjects: SECS-P/06 Economia applicata

description: We investigate dynamic R&D for process innovation in an oligopoly where
firms invest in cost-reducing activities. We focus on the relationship between
R&D intensity and market structure, proving that the industry R&D investment
monotonically increases in the number of firms. This Arrowian result
contradicts the established wisdom acquired from static games on the same
topic.
Gnaphalostetha Reiche & Saulcy 1856
Creators: name: Allsopp, Peter G.
name: Schoolmeesters, Paul
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Gnaphalostetha

description: Gnaphalostetha Reiche & Saulcy, 1856
[4 species].
Type species Gnaphalostetha bonvoisini Reiche & Saulcy, 1856, by monotypy.
description: Published as part of Allsopp, Peter G. & Schoolmeesters, Paul, 2024, All genera of the world: Subfamilies Prototroginae, Cretoscarabaeinae, Dynamopodinae, Electrorubesopsinae, Phaenomeridinae, Orphninae, Allidiostomatinae, Aclopinae, Lichniinae, Melolonthinae, Oncerinae, Podolasiinae, Sericinae, Sericoidinae (Animalia: Arthropoda: Insecta: Coleoptera: Scarabaeidae), pp. 104-175 in Megataxa 12 (1) on page 129, DOI: 10.11646/megataxa.12.1.2, http://zenodo.org/record/14984437
Biasing Circuits for Voltage Controlled GSM Power Amplifiers
Creators: name: Van Bezooijen, André
name: Prikhodko, Dima
name: Van Roermund, A.H.M.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2003
Subjects: ING-INF/01 Elettronica

description: In GSM phones voltage controlled power amplifiers are used to vary the output power.Inaccuracies in output power levels are predominantly caused by drift in PA gain over temperature and input power.In this paper we present biasing circuits that implement an inherently accurate gain control curve.These circuits are based on temperature stabilised V/I-converters and current mirrors.Applying current driven biasing of the first RF-stage reduces the input power dependency of the gain.Measurements show an order of magnitude less drift in PA gain over temperature variations and about a factor five smaller drift over input power variations.The proposed circuits relax the dynamic range and stability requirements on the power control loop and they will help making phone output power calibrations redundant.
A Simple Technique for Improving the IM3/C and PAE Performance of MESFET Amplifiers
Creators: name: Wong, J. N. H.
name: Aitchison, C. S.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2003
Subjects: ING-INF/01 Elettronica

description: This paper shows by simulation that a shunt short -circuited O/4 line placed across the drain terminals of a microwave MESFET amplifier significantly improves both the IM3/C and 2-tone PAE performance by a maximum of 14dB and 3%(from 24.5%to 27.5%),respectively.Practical confirmation with both WCDMA and GSM-EDGE input signals is obtained with a microstrip amplifier at 2GHz demonstrating an average improvement in ACPR of 12.5dB and a reduction in EVM from 5.0%to 1.3%respectively. The technique is novel,simple and practical and will be of direct interest to designers of base station amplifiers.
An 1 GHz Class E LDMOS Power Amplifier
Creators: name: Adahl, Andreas
name: Zirath, Herbert
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2003
Subjects: ING-INF/01 Elettronica

description: A class E power amplifier working at 1 GHz and with an LDMOS transistor as switching element has been developed.The circuit is implemented with lumped and distributed elements.An output power of 6.2 W at 69 %drain efficiency with a gain of 11 dB was obtained at 1 GHz.Both simulations and measurements of the amplifier are presented within this paper.This is to our knowledge the highest efficiency and output power reported for a class E amplifier at 1 GHz.
A Chip-Scale Packaged Amplifier MMIC using Broadband Hot-Via Transitions
Creators: name: Bessemoulin, A.
name: Gaessler, C.
name: Marschall, P.
name: Quentin, P.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2003
Subjects: ING-INF/01 Elettronica

description: The performance of RF hot-via transitions for use in chip-scale package (CSP)MMICs are presented. This is illustrated with the realization of a low noise amplifier MMIC using optimized hot-via s.Based on our standard 0.25-µ m GaAs low-noise PHEMT process,with BCB coating and backside metallization,this 2-stage lownoise microstrip amplifier mounted with bumps on a carrier  substrate achieved a linear gain of 15 dB over the 15-to 32 GHz frequency range.To the author ’s knowledge,this is the first demonstration of chip-scale packaged active MMICs using hot-via transitions.
Wafer Level Integration of a 24 GHz Differential SiGe-MMIC Oscillator with a Patch Antenna using BCB as a Dielectric Layer
Creators: name: Abele, P.
name: Ojefors, E.
name: Schad, K.-B.
name: Sonmez, E.
name: Trasser, A.
name: Konle, J.
name: Schumacher, H.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2003
Subjects: ING-INF/01 Elettronica

description: This paper describes the wafer level inte-gration of a differential 24 GHz SiGe-MMIC oscillator including a buffer amplifier with a differentially driven patch antenna. The patch antenna is realized on 30 µm BCB (Benzo Cyclo Butene) used as a dielectric layer. The radiated power of the patch antenna driven by the oscillator is calculated based on measurements and the result is discussed.
GCG Parametrization for Growth Function and Current Constraints
Creators: name: Gupta, Gaveshna
name: Sen, Somasri
name: Sen, Anjan A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study the linear growth function $f$ for large scale structures in a cosmological scenario where Generalised Chaplygin Gas (GCG) serves as dark energy candidate. We parametrize the growth index parameter as a function of redshift and do a comparative study between the theoretical growth rate and the proposed parametrization. Moreover, we demonstrate that growth rates for a wide range of dark energy models can be modeled accurately by our proposed parametrization. Finally, we compile a data set consisting of 28 data points within redshift range (0.15,3.8) to constrain the growth rate. It includes direct growth data from various projects/surveys including the latest data from the Wiggle-Z measurements. It also includes data constraining growth indirectly through the rms mass fluctuation $σ_8(z)$ inferred from Ly-$α$ measurements at various redshifts. By fitting our proposed parametrization for $f$ to these data, we show that growth history of large scale structures of the universe although allows a transient acceleration, one cannot distinguish it at present with an eternally accelerating universe.
description: 19 pages, Latex Style, 5 EPS figures, 3 Tables, Revised and improved version
Additional file 1 of Detection of cryptogenic malignancies from metagenomic whole genome sequencing of body fluids
Creators: name: Gu, Wei
name: Talevich, Eric
name: Hsu, Elaine
name: Qi, Zhongxia
name: Urisman, Anatoly
name: Federman, Scot
name: Gopez, Allan
name: Arevalo, Shaun
name: Gottschall, Marc
name: Liao, Linda
name: Tung, Jack
name: Chen, Lei
name: Lim, Harumi
name: Ho, Chandler
name: Kasowski, Maya
name: Oak, Jean
name: Holmes, Brittany J.
name: Yeh, Iwei
name: Yu, Jingwei
name: Wang, Linlin
name: Miller, Steve
name: DeRisi, Joseph L.
name: Prakash, Sonam
name: Simko, Jeff
name: Chiu, Charles Y.
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Biotechnology
subject: Biological Sciences not elsewhere classified
subject: Mathematical Sciences not elsewhere classified
subject: Cancer
subject: Virology

description: Additional file 1: Supplementary Results.
Feedback Amplifier based on an Embedded HEMT in Thin-film Multilayer MCM-D Technology
Creators: name: Vandersmissen, Raf
name: Schreurs, Dominique
name: Carchon, G.
name: Borghs, G.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2003
Subjects: ING-INF/01 Elettronica

description: In this paper a feedback amplifier circuit integrated in MCM-D (MultiChip Module with Deposited thin films) on glass technology is presented. The active device of the amplifier is a thin-film Ge (germanium) -based HEMT. The HEMT is embedded in the bottom dielectric layer of the MCM-D. The combination of passive MCM-D technology and HEMTs on Ge allows for efficient semi-monolithic integration of active devices and realization of MCMs with embedded passive and active components for amplifier circuits.
Infinitesimal generators and the Loewner equation on complete hyperbolic manifolds
Creators: name: Arosio, Leandro
name: Bracci, Filippo
Publisher: name: arXiv
Year: 2011
Subjects: subject: Complex Variables (math.CV)
subject: FOS: Mathematics

description: We characterize infinitesimal generators on complete hyperbolic complex manifolds without any regularity assumption on the Kobayashi distance. This allows to prove a general Loewner type equation with regularity of any order $d\in [1,+\infty ]$. Finally, based on these results, we focus on some open problems naturally arising.
description: 13 pages; misprints corrected and some proofs clarified
Gronocarus Schaeffer 1927
Creators: name: Allsopp, Peter G.
name: Schoolmeesters, Paul
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Gronocarus

description: Gronocarus Schaeffer, 1927
[2 species].
Type species Gronocarus autumnalis Schaeffer, 1927, by original designation.
description: Published as part of Allsopp, Peter G. & Schoolmeesters, Paul, 2024, All genera of the world: Subfamilies Prototroginae, Cretoscarabaeinae, Dynamopodinae, Electrorubesopsinae, Phaenomeridinae, Orphninae, Allidiostomatinae, Aclopinae, Lichniinae, Melolonthinae, Oncerinae, Podolasiinae, Sericinae, Sericoidinae (Animalia: Arthropoda: Insecta: Coleoptera: Scarabaeidae), pp. 104-175 in Megataxa 12 (1) on page 129, DOI: 10.11646/megataxa.12.1.2, http://zenodo.org/record/14984437
Characterisation, Modelling and Design of Bond-Wire Interconnects for Chip-Package Co-Design Insertion Loss (dB)
Creators: name: Chandrasekhar, Arun
name: Stoukatch, Serguei
name: Brebels, S.
name: Balachandran, Jayaprakash
name: Beyne, Eric
name: De Raedt, W.
name: Nauwelaers, Bart
name: Poddar, Anindya
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2003
Subjects: ING-INF/01 Elettronica

description: This work is a comprehensive experimental investigation of chip to package wirebond interconnects for chip-package co-design. Wirebonds are interconnect bottlenecks in RF design, but are difficult to avoid due to their low cost and manufacturing ease. We have shown measurements on wirebonds in coplanar configuration with different return paths and also the cross coupling. We have also extracted lumped and distributed models and demonstrate the excellent agreement with measurements atleast upto 15GHz. We have proposed multi-wirebonds as a potential solution for better impedance matching. Different types of inductors with Q-factors of upto 100 have also been illustrated. We show influence of encapsulant on wirebonds and finally we also demonstrate a methodology to extract the time-domain response from S-parameters.
Multiaxial deformation of AZ80 magnesium alloy
Creators: name: Tomlinson, Philip S.
Publisher: name: University of British Columbia
Year: 2013

description: The multiaxial deformation of magnesium alloys is important for developing reliable, robust models for both the forming of components and also analysis of in service performance of structures, for example, in the case of crash worthiness. This work presents a combination of unique biaxial experimental tests and biaxial crystal plasticity simulations using a visco-plastic self-consistent (VPSC) formulation conducted on AZ80 magnesium alloy in two different conditions - extruded and a more weakly textured as cast condition. The experiments were conducted on tubular samples which are loaded in axial tension or compression along the tube and with internal pressure to generate hoop stresses orthogonal to the axial direction. The results were analyzed in stress and strain space and also in terms of the evolution of crystallographic texture. In general, it was found that the VPSC simulations matched well with the experiments, particularly for the more weakly textured cast material. However, some differences were observed for cases where basal < a > slip and {10¯12} extension twinning were in close competition such as in the biaxial tension quadrant of the plastic potential. The evolution of texture measured experimentally and predicted from the VPSC simulations was qualitatively in good agreement. Finally, experiments and VPSC simulations were conducted in which samples of the extruded AZ80 material were subjected to a small uniaxial strain prior to biaxial loading in order to further explore the competition between basal slip and extension twinning.
System-on-Package (SOP) Architectures for compact and low cost RF Front-end modules
Creators: name: Pinel, S.
name: Lim, K.
name: DeJean, R.G.
name: Li, L.
name: Lee, C-H.
name: Maeng, M.
name: Davis, M.F.
name: Tentzeris, M.
name: Laskar, J.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2003
Subjects: ING-INF/01 Elettronica

description: This paper presents the development of advanced System-on-Package (SOP)architectures for compact and low cost wireless RF wireless systems. We present the design of compact stacked patch antennas using SHS structures for LMDS and V- band applications.Multi-layer organic packaging development for SOP is reported.An Intelligent Network Communicator (INC)RF block is presented as example of the high performances of multi-layer organic package.A novel ultra-compact 3D integration technology for SOP-based solutions is proposed and utilized for the implementation of a Ku band VCO module.In addition,the fabrication of very high Q- factor inductors in Liquid Crystal Polymer multi-layer substrate demonstrate superior performances compared to any other multilayer organic packages.
Quantification of Corporate Governance: A Trial for Japanese Corporate Governance Quotient (JCGQ)
Creators: name: Dissabandara, Hareedra
Publisher: name: figshare
Year: 2021
Subjects: subject: 150303 Corporate Governance and Stakeholder Engagement
subject: FOS: Economics and business

description: On average, Japanese large companies exhibit a moderately satisfactory level of adherence (58.4%). A-type companies demonstrate a quite satisfactory level of adherence (71.3%) than the fairly satisfactory adherence (62.1%) by the JA-type companies and slightly satisfactory level of adherence (55.7%) by the J-type companies. Regrettably the level of compliance (36.4%) by the SMCs is still far away from the expected governance model of this study. This reveals that CG of larger companies is improving rapidly, however there is a broad variation in CG practices across the firms, both large & SMCs and the disparity is large even among larger companies.
Effective dynamics of an electron coupled to an external potential in non-relativistic QED
Creators: name: Bach, Volker
name: Chen, Thomas
name: Faupin, Jeremy
name: Froehlich, Juerg
name: Sigal, Israel Michael
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 81T08, 81V10

description: In the framework of non-relativistic QED, we show that the renormalized mass of the electron (after having taken into account radiative corrections) appears as the kinematic mass in its response to an external potential force. Specifically, we study the dynamics of an electron in a slowly varying external potential and with slowly varying initial conditions and prove that, for a long time, it is accurately described by an associated effective dynamics of a Schrödinger electron in the same external potential and for the same initial data, with a kinetic energy operator determined by the renormalized dispersion law of the translation-invariant QED model.
description: 22 pages, AMS Latex
RSK correspondence and classically irreducible Kirillov-Reshetikhin crystals
Creators: name: Kwon, Jae-Hoon
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Algebra (math.QA)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 17B37

description: We give a new combinatorial model of the Kirillov-Reshetikhin crystals of type $A_n^{(1)}$ in terms of non-negative integral matrices based on the classical RSK algorithm, which has a simple description of the affine crystal structure without using a promotion operator. We also have a similar description of the Kirillov-Reshetikhin crystals associated to exceptional nodes in the Dynkin diagrams of classical affine or non-exceptional type.
description: 25 pages
Single Supply,High Linearity,High Efficient PHEMT Power Devices and Amplifier for 2 GHz &5 GHz WLAN Applications
Creators: name: Park, Min
name: Ahn, Hokyun
name: Kang, Dong Min
name: Ji, Honggu
name: Mun, Jaekyoung
name: Kim, Haecheon
name: Cho, Kyoung Ik
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2003
Subjects: ING-INF/01 Elettronica

description: A single supply,high linearity,high efficient power devices and amplifier MMIC is implemented utilizing high performance of quasi-enhanced power PHEMT technology.The PHEMT power device features Vth=-0.65 V,Vbdg=26 V,Imax=144 mA/mm at Vgs=0.2 V, Gm=340 mS/mm.When matched on-wafer compromise between power and efficiency,the OIP3 at peak IP3 is 40.5 1Bm for 2 GHz and 37.0 dBm for 5.8 GHz,respectively. The power amplifier achieves at 5.8 GHz Pout=27 dBm with associated PAE=45 %at 5 V under Vgs=0 V,GL=14.5 dB,OIP3=37.5 dBm.
The classical-quantum boundary for correlations: discord and related measures
Creators: name: Modi, Kavan
name: Brodutch, Aharon
name: Cable, Hugo
name: Paterek, Tomasz
name: Vedral, Vlatko
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: One of the best signatures of nonclassicality in a quantum system is the existence of correlations that have no classical counterpart. Different methods for quantifying the quantum and classical parts of correlations are amongst the more actively-studied topics of quantum information theory over the past decade. Entanglement is the most prominent of these correlations, but in many cases unentangled states exhibit nonclassical behavior too. Thus distinguishing quantum correlations other than entanglement provides a better division between the quantum and classical worlds, especially when considering mixed states. Here we review different notions of classical and quantum correlations quantified by quantum discord and other related measures. In the first half, we review the mathematical properties of the measures of quantum correlations, relate them to each other, and discuss the classical-quantum division that is common among them. In the second half, we show that the measures identify and quantify the deviation from classicality in various quantum-information-processing tasks, quantum thermodynamics, open-system dynamics, and many-body physics. We show that in many cases quantum correlations indicate an advantage of quantum methods over classical ones.
description: Close to the published version
Generalized Second Law of Thermodynamics in $f(T)$ Gravity with Entropy Corrections
Creators: name: Bamba, Kazuharu
name: Jamil, Mubasher
name: Momeni, D.
name: Myrzakulov, Ratbay
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Physics (physics.gen-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We study the generalized second law (GSL) of thermodynamics in $f(T)$ cosmology. We consider the universe as a closed bounded system filled with $n$ component fluids in the thermal equilibrium with the cosmological boundary. We use two different cosmic horizons: the future event horizon and the apparent horizon. We show the conditions under which the GSL will be valid in specific scenarios of the quintessence and the phantom energy dominated eras. Further we associate two different entropies with the cosmological horizons: with a logarithmic correction term and a power-law correction term. We also find the conditions for the GSL to be satisfied or violated by imposing constraints on model parameters.
description: 17 pages, no figure, title changed, version accepted for publication in Astrophysics and Space Science
A look on the internal structure of Teleparallel Equivalent of General Relativity
Creators: name: Belo, L. R. A.
name: Spaniol, E. P.
name: de Deus, J. A.
name: de Andrade, V. C.
Publisher: name: arXiv
Year: 2011
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Using the Dirac procedure to treat constraints dynamical sistems applied to gravitation, as described in the context of Teleparallel Equivalent of General Relativity (TEGR), we investigate, from the first class constraints, the gauge transformations in the fundamental field: the components of tetrads. We have shown that there is no an isotropy in physical space with respect to gauge transformations, i.e., given an arbitrary gravitational field, coming from a gauge transformation in the internal space, physical space reacts differently in the spatial and temporal components. By making an appropriate choice, we have found a gauge transformation for the components of tetrad field that allows a direct analogy with the gauge transformations of the Yang-Mills theory. In addition, to the asymptotically flat case in which the algebra index is fixed, we recover the transformations of Electromagnetism. Moreover, still considering the asymptotically flat case, the dependence of the gauge transformation parameter in the space-time variables is periodic, just like in the Electromagnetism. Furthermore, the gravitoelectric and gravitomagnetic fields as have recently been defined, make sense since they allow a direct relation with the momenta, which is analogous to what occurs in other gauge theories.
description: 13 pages
The puzzle of bulk conformal field theories at central charge c=0
Creators: name: Vasseur, Romain
name: Gainutdinov, Azat M.
name: Jacobsen, Jesper Lykke
name: Saleur, Hubert
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mathematical Physics (math-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Non-trivial critical models in 2D with central charge c=0 are described by Logarithmic Conformal Field Theories (LCFTs), and exhibit in particular mixing of the stress-energy tensor with a "logarithmic" partner under a conformal transformation. This mixing is quantified by a parameter (usually denoted b), introduced in [V. Gurarie, Nucl. Phys. B 546, 765 (1999)], and which was first thought to play the role of an "effective" central charge. The value of b has been determined over the last few years for the boundary versions of these models: $b_{\rm perco}=-5/8$ for percolation and $b_{\rm poly} = 5/6$ for dilute polymers. Meanwhile, the existence and value of $b$ for the bulk theory has remained an open problem. Using lattice regularization techniques we provide here an "experimental study" of this question. We show that, while the chiral stress tensor has indeed a single logarithmic partner in the chiral sector of the theory, the value of b is not the expected one: instead, b=-5 for both theories. We suggest a theoretical explanation of this result using operator product expansions and Coulomb gas arguments, and discuss the physical consequences on correlation functions. Our results imply that the relation between bulk LCFTs of physical interest and their boundary counterparts is considerably more involved than in the non-logarithmic case.
description: 5 pages, published version
Allore et al. Supplemental Material from Seeing in the swamp: hydrogen sulfide inhibits eye metabolism and visual acuity in a sulfide-tolerant fish
Creators: name: Allore, Claire A.
name: Rossi, Giulia S.
name: Wright, Patricia A.
Publisher: name: The Royal Society
Year: 2021
Subjects: subject: Cell Biology
subject: Environmental Science
subject: Ecology
subject: FOS: Biological sciences

description: Supplemental Figures and Tables
Gravitational energy of a magnetized Schwarzschild black hole - a teleparallel approach
Creators: name: Castello-Branco, K. H. C.
name: da Rocha-Neto, J. F.
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate the distribution of gravitational energy on the spacetime of a Schwarzschild black hole immersed in a cosmic magnetic field. This is done in the context of the {\it Teleparallel Equivalent of General Relativity}, which is an alternative geometrical formulation of General Relativity, where gravity is describe by a spacetime endowed with torsion, rather than curvature, with the fundamental field variables being tetrads. We calculate the energy enclosed by a two-surface of constant radius - in particular, the energy enclosed by the event horizon of the black hole. In this case we find that the magnetic field has the effect of increasing the gravitational energy as compared to the vacuum Schwarzschild case. We also compute the energy (i) in the weak magnetic field limit, (ii) in the limit of vanishing magnetic field, and (iii) in the absence of the black hole. In all cases our results are consistent with what should be expected on physical grounds.
description: version to match the one to be published on General Relativity and Gravitation
Variable-Load Constant-Efficiency Power Amplifier for Mobile Communications Applications
Creators: name: Leuzzi, Giorgio
name: Micheli, Claudio
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2003
Subjects: ING-INF/01 Elettronica

description: A SiGe HBT Class-B power amplifier has been developed with a voltage-controlled variable loaf,for constant efficiency also a low power levels.The output matching network includes varactor diodes that can change the load impedance at the collector of the transistor.The load line can therefore be adjusted to provide a variable output power saturation level,shifting the peak of the efficiency to the desired power level.Constant efficiency over a wide input power range is obtained.This amplifier minimises power consumption for variable output power applications,as required in mobile communications systems.
Gymnogaster Blanchard 1851
Creators: name: Allsopp, Peter G.
name: Schoolmeesters, Paul
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Gymnogaster

description: Gymnogaster Blanchard, 1851 (not Gymnogaster Gronow, 1763, Gymnogaster Brünnich, 1788, Gymnogaster Lioy, 1864, nor Gymnogaster Townsend, 1926)
[1 species].
Type species Gymnogaster buphthalma Blanchard, 1851 (= Anoxia africana Laporte, 1832), by monotypy.
Gymnogaster: Dejean 1833. Unavailable name.
description: Published as part of Allsopp, Peter G. & Schoolmeesters, Paul, 2024, All genera of the world: Subfamilies Prototroginae, Cretoscarabaeinae, Dynamopodinae, Electrorubesopsinae, Phaenomeridinae, Orphninae, Allidiostomatinae, Aclopinae, Lichniinae, Melolonthinae, Oncerinae, Podolasiinae, Sericinae, Sericoidinae (Animalia: Arthropoda: Insecta: Coleoptera: Scarabaeidae), pp. 104-175 in Megataxa 12 (1) on page 130, DOI: 10.11646/megataxa.12.1.2, http://zenodo.org/record/14984437
A refined stable restriction theorem for vector bundles on quadric threefolds
Creators: name: Coanda, Iustin
name: Faenzi, Daniele
Publisher: name: arXiv
Year: 2011
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14J60 (Primary) 14J30, 14F05, 14D20 (Secondary)

description: Let E be a stable rank 2 vector bundle on a smooth quadric threefold Q in the projective 4-space P. We show that the hyperplanes H in P for which the restriction of E to the hyperplane section of Q by H is not stable form, in general, a closed subset of codimension at least 2 of the dual projective 4-space, and we explicitly describe the bundles E which do not enjoy this property. This refines a restriction theorem of Ein and Sols [Nagoya Math. J. 96, 11-22 (1984)] in the same way the main result of Coanda [J. reine angew. Math. 428, 97-110 (1992)] refines the restriction theorem of Barth [Math. Ann. 226, 125-150 (1977)].
description: Ann. Mat. Pura Appl. 2012
Die ur- und frühgeschichtliche Besiedlung des Kreises Riesa-Großenhain (Reg.-Bez. Dresden)
Creators: name: Balfanz, Ingmar
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2003
Subjects: subject: Landkreis Riesa-Großenhain
subject: Siedlung
subject: Vor- und Frühgeschichte
subject: Elektronische Publikation
subject: Hochschulschrift
subject: Online-Publikation
subject: 943.214301

description: In der vorliegenden Studie wird die chronologische und räumliche Verteilung von ur- und frühgeschichtlichen Fundstellen vom Paläolithikum bis einschließlich der frühen Völkerwanderungszeit eines eng begrenzten, in Geologie und Relief heterogenen Gebietes (Kreis Riesa- Großenhain) analysiert. Das rund 822 km2 große Arbeitsgebiet ist Bestandteil des nord-sächsischen Flachlandstreifens und umfasst das Elbtiefland bei Riesa und die Großenhainer Pflege. Basis der Auswertung bilden die auf 203 Gemarkungen verteilten 998 Fundstellen mit insgesamt 2018 belegbaren Fundeinheiten. Es wurden über 18000 Einzelinformationen zu siedlungsrelevanten Standortkriterien und Daten für die quellenkritische Analyse der Fundumstände ausgewertet. Die Besiedlungsabfolge hat gezeigt, dass die naturräumliche Ausstattung, insbesondere die vorhandenen Ressourcen, im Kreis Riesa-Großenhain während längerer Zeitabschnitte den prähistorischen und frühgeschichtlichen Ansprüchen genügten. Obwohl von einer echten Siedlungskontinuität nicht die Rede sein, wurde entlang der Elbe ab der Jungbronzezeit eine durch Hochwassergrenzen beeinflusste, doch fortwährende Ortskonstanz gewahrt, welche bis zum Ende der Eisenzeit, stellenweise auch darüber hinaus, beibehalten wurde.
description: In the existent study the chronological and spatial distribution prehistoric and ancient historic locations of finds from the Palaeolithic until including the early time of migration of peoples of a strongly limited area heterogeneous in geology and relief (district Riesa-Großenhain) is analysed. The working area of a size of approximately 822 km is a component of the North Saxon lowland section and comprises the lowland of the river Elbe near Riesa as well as the Großenhain cultivation. The 998 locations of finds with altogether 2018 verifiable units of finds spread on 203 districts build the basis of evaluation. More than 18.000 individual information about settlement relevant location criteria and data were evaluated for the source critical analysis of the find circumstances. The sequence of settlement has shown that the countryside features, particularly the existing resources, in the district Riesa-Großenhain fulfilled the prehistoric and ancient historic requirements during longer periods of time. Although there has never been real settlement continuity a persistent location constancy along the river Elbe was safeguarded from the Late Bronze Age influenced by high tide limits, which was maintained until the end of the Iron Age, in some places also going beyond it.
Untersuchungen zur Struktur und Reaktivität von Metallkomplexen mit phosphor-funktionalisierten Triorganozinnhalogeniden
Creators: name: Kruber, Dirk Siegfried
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 1998
Subjects: Elektronische Publikation

description: Das Prinzip der intramolekularen Koordination ist in der Komplexchemie von Übergangsmetall - aber auch von Hauptgruppenorganometallverbindungen für die Synthese, die Stabilität und die Reaktivität zahlreicher Substanzklassen von großer Bedeutung. So begünstigt dieses Prinzip die Darstellung von Metallaheterocyclen mit dem Strukturelement [M]D-C mittels C-D-Chelatliganden (D = Donorgruppe) durch Cyclometallierung, reduktive Cyclometallierung und oxidative Cycloaddition. Gegenstand der vorliegenden Arbeit ist die Synthese und Charakterisierung von Ligandsystemen mit dem Strukturelement -Sn(Cl)-[C]-PPh2 ([C] = Brückenglied) und deren Reaktionen mit Übergangsmetallhalogeniden bzw. -halogenidkomplexen. Je nach Art der untersuchten Brückenglieder können typische Reaktionsweisen beobachtet werden. 1. Pd(II)-katalysierte Protolyse der Sn-C-Bindungen, 2. Ausbildung von Übergangsmetall-Halogen-Zinn-Brücken, 3. Knüpfung von Übergangsmetall-Kohlenstoff-Bindungen unter Verlust der Organostannylgruppierung und Bildung von Metallacyclen. Im Laufe der Untersuchungen konnte für eine Vielzahl der Verbindungen eine Röntgenkristallstrukturanalyse durchgeführt werden.
description: The principle of intramolecular coordination in complex chemistry is of great importance with regards to synthesis, stability and reactivity not only for transition metals, but also for organometal compounds of the main groups. This mechanism favours the formation of metalla heterocycles including the basic structure [M]D-C by reductive cyclometallation and oxidative cycloaddition by means of chelating ligands C-D with D being donor group. The present studies deal with the synthesis and characterisation of ligand systems with -Sn(Cl)-[C]-PPh2 as the basic structure, [C] referring to a bridging group, as well as their reaction with transition metal halides and their -halide complexes. The results gave evidence that the type of bridging group strongly influences the reaction mechanism. Thus, three distinct reaction mechanisms could be elucidated, depending on which bridging group was employed: First, Pd(II) catalysed protolysis of Sn-C-bonds. Second, the formation of M-Cl... Sn interactions, M referring to the transition metals Pd, Pt, Rh. Third, the formation of transition metalcarbon bonds by loosing the organotin group and yielding metallacycles. In addition, a lot of these compounds have been characterized by means of crystal structure analysis.
Additional file 20 of Fungal and bacterial microbiome dysbiosis and imbalance of trans-kingdom network in asthma
Creators: name: Huang, Chunrong
name: Yu, Youchao
name: Du, Wei
name: Liu, Yahui
name: Dai, Ranran
name: Tang, Wei
name: Wang, Ping
name: Zhang, Chenhong
name: Shi, Guochao
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Physiology
subject: Ecology
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Infectious Diseases
subject: FOS: Health sciences

description: Additional file 20: Fig. S11. Rarefaction curves of Shannon (a) and Simpson (b) indices of 82 samples (bacteriome). X: number of sequences per sample, Y: rarefaction measure.
Autochthone Malaria im mitteldeutschen Raum
Creators: name: Dalitz, Margot Kathrin
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2005
Subjects: subject: Elektronische Publikation
subject: Zsfassung in engl. Sprache
subject: 616.9

description: Einheimische (autochthone) Malariaerregerübertragung ist an vier Grundvoraussetzungen gebunden: das Vorhandensein von Anophelesmücken, von bereits infizierten und infizierbaren Menschen sowie klimatische Bedingungen, die für die Sporozoitenausreifung in der Anophelesmücke günstig sind. Die vorliegende Arbeit zeigt, daß diese Voraussetzungen im mitteldeutschen Raum bis heute erfüllt sind. Insbesondere die Temperaturverhältnisse im gemäßigten Klima stehen einer Sporozoitenausreifung in der Überträgermücke nicht entgegen, was anhand einer Gleichung zur Berechnung der Sporozoitenreifungszeit in Abhängigkeit von der Umgebungstemperatur demonstriert wird. Der mitteldeutsche Raum ist somit unverändert als malariogen zu betrachten. Die Gefahr autochthoner Malaria wächst noch durch die globale Klimaerwärmung und die steigende Zahl eingeschleppter Malariaerkrankungen. Dem muß bei der medizinischen Versorgung der Bevölkerung künftig verstärkt Rechnung getragen werden.
description: The autochthonous transmission of malaria depends on the following conditions: presence of Anopheles, presence of infectious persons and persons susceptible for malaria and favourable climatic conditions. This paper shows, that in Germany all these conditions are satisfied. Especially the climatic conditions are convenient for the maturation of malaria parasites in indigenous mosquitoes, which is demonstrated by a formula to calculate the time of maturation of malaria parasites in dependence on the temperature. Thus, in Germany there is a potential for autochthonous malaria transmission. The risk of autochthonous malaria grows moreover in connection with the global warming and with the increasing number of malaria cases imported to Germany. To prevent the indigenous spread of malaria this danger has to be considered by the public health care system.
Additional file 2 of Fungal and bacterial microbiome dysbiosis and imbalance of trans-kingdom network in asthma
Creators: name: Huang, Chunrong
name: Yu, Youchao
name: Du, Wei
name: Liu, Yahui
name: Dai, Ranran
name: Tang, Wei
name: Wang, Ping
name: Zhang, Chenhong
name: Shi, Guochao
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Physiology
subject: Ecology
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Infectious Diseases
subject: FOS: Health sciences

description: Additional file 2: Table S1. Demographic and clinical characteristics of study subjects (mycobiome) (n=68).
Proposal for an Electron Antineutrino Disappearance Search Using High-Rate 8Li Production and Decay
Creators: name: Bungau, A.
name: Adelmann, A.
name: Alonso, J. R.
name: Barletta, W.
name: Barlow, R.
name: Bartoszek, L.
name: Calabretta, L.
name: Calanna, A.
name: Campo, D.
name: Conrad, J. M.
name: Djurcic, Z.
name: Kamyshkov, Y.
name: Shaevitz, M. H.
name: Shimizu, I.
name: Smidt, T.
name: Spitz, J.
name: Wascko, M.
name: Winslow, L. A.
name: Yang, J. J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: This paper introduces a novel, high-intensity source of electron antineutrinos from the production and subsequent decay of 8Li. When paired with an existing ~1 kton scintillator-based detector, this =6.4 MeV source opens a wide range of possible searches for beyond standard model physics via studies of the inverse beta decay interaction. In particular, the experimental design described here has unprecedented sensitivity to electron antineutrino disappearance at $Δm^2\sim$ 1 eV$^2$ and features the ability to distinguish between the existence of zero, one, and two sterile neutrinos.
description: 5 pages, 4 figures; (new version after PRL referee's comments)
Subsampling at Information Theoretically Optimal Rates
Creators: name: Javanmard, Adel
name: Montanari, Andrea
Publisher: name: arXiv
Year: 2012
Subjects: subject: Information Theory (cs.IT)
subject: Statistics Theory (math.ST)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: We study the problem of sampling a random signal with sparse support in frequency domain. Shannon famously considered a scheme that instantaneously samples the signal at equispaced times. He proved that the signal can be reconstructed as long as the sampling rate exceeds twice the bandwidth (Nyquist rate). Candès, Romberg, Tao introduced a scheme that acquires instantaneous samples of the signal at random times. They proved that the signal can be uniquely and efficiently reconstructed, provided the sampling rate exceeds the frequency support of the signal, times logarithmic factors. In this paper we consider a probabilistic model for the signal, and a sampling scheme inspired by the idea of spatial coupling in coding theory. Namely, we propose to acquire non-instantaneous samples at random times. Mathematically, this is implemented by acquiring a small random subset of Gabor coefficients. We show empirically that this scheme achieves correct reconstruction as soon as the sampling rate exceeds the frequency support of the signal, thus reaching the information theoretic limit.
description: 5 pages, 4 figures, minor corrections
Innovation and managerial incentives: a tale of two systems
Creators: name: Lambertini, Luca
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2004
Subjects: SECS-P/08 Economia e gestione delle imprese

description: This paper describes R&D competition between a managerial firm
and an entrepreneurial one, in a Cournot market. It is shown that
a manager interested in output expansion exerts higher R&D efforts,
yielding productive efficiency as compared to the performance of a
strictly profit-seeking firm. This may ultimately yield monopoly power
for the managerial firm, if technological spillovers in the industry are
low enough.
Prices vs. quantities in health insurance reimbursement
Creators: name: Barigozzi, Francesca
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2003
Subjects: SECS-P/01 Economia politica

description: I compare in-kind reimbursement (which fixes treatment quantities)
and reimbursement insurance (which fixes treatment prices) as demandside,
cost-containment measures. In the model, illness has a negative impact
on labor productivity and public insurance is financed through labor
income taxation. Consumers are heterogeneous with respect to intensity
of preferences for treatment which is their private information. The social
planner may be constrained to adopt uniform (pooling) allocations
or may be free to choose discriminating (self selecting) allocations in the
reimbursement plan.
Analyzing pooling allocations I show that reimbursement insurance
dominates in-kind reimbursement from a social welfare point of view.
While considering self-selecting allocations I show that the two reimbursement
methods are equivalent.
The signaling effect of tax policy
Creators: name: Barigozzi, Francesca
name: Villeneuve, Bertrand
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2004
Subjects: SECS-P/01 Economia politica

description: The paper focuses on the signaling value of a tax when agents are less
informed on the effect of their consumption than the policy-maker. When
he chooses the tax, the policy-maker optimizes both the incentive effect
and the effect on beliefs. We show that optimal taxes under symmetric
information are not implementable under asymmetric information. The tax
distortion required for credibility depends on the marginal cost of public
funds and brings to undertaxation.