cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Monolithic low noise amplifier for X-band applications
Creators: name: Feldle, Heinz-Peter
name: Reber, R. H.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1998
Subjects: ING-INF/01 Elettronica

description: This paper presents the design aspects and performance of a monolithic low noise amplifier (LNA) for X-band applications. The LNA, based on GaAs PM-HEMT technology, shows a noise figure of only 1.1 dB at room temperature and a gain of 19 dB with high gain flatness over a bandwidth of 30%, The design was induced by the requirements of real active phased array antenna modes, e. g. switched applications, high IP3 and damage level. A statistical analysis over a large number of LNAs is added showing the high yield and good uniformity of this device.
Panotrogus Reitter 1902
Creators: name: Allsopp, Peter G.
name: Schoolmeesters, Paul
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Panotrogus

description: Panotrogus Reitter, 1902
[21 species and 1 additional subspecies].
Type species Rhizotrogus myschenkowi Ballion, 1871, 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 131, DOI: 10.11646/megataxa.12.1.2, http://zenodo.org/record/14984437
Peter David Krukenberg (1787 - 1865) - Leben und Werk
Creators: name: Schröter, Rebekka Cynthia
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2010
Subjects: subject: Online-Publikation
subject: Hochschulschrift
subject: 617

description: Peter Krukenberg wurde 1814 zum außerordentlichen Professor an der Universität Halle ernannt. Hier übernahm er eine Professur für Pathologie und Therapie sowie interimistisch die Direktion der Medizinischen Klinik. Etwa ein Jahr nach Übernahme seines Amtes wurde die vakante ordentliche Professur mit C. F. Nasse neu besetzt, so dass Krukenberg die Leitung der Medizinischen Klinik abgeben musste. Daraufhin entwickelte er die Idee, eine ambulatorische Klinik zu errichten, in der die armen Kranken der Stadt kostenlos behandelt und die Medizinstudenten praktisch ausgebildet werden konnten. Die ambulatorische Klinik wurde im Frühjahr 1816 in Krukenbergs Privathaus in der Brüderstraße eröffnet. Nach dem Weggang Nasses 1819 übernahm Krukenberg erneut kommissarisch die universitäre Medizinische Klinik, wurde aber 1822 zum ordentlichen Professor ernannt. Fast das gesamte Wirken bezog sich auf die Versorgung seiner Patienten und die Ausbildung junger Ärzte und Studenten. Auf Drängen des Ministeriums veröffentliche Krukenberg 1820 und 1824 zwei Bände der „Jahrbücher der ambulatorischen Klinik zu Halle“.
Quantum-circuit design for efficient simulations of many-body quantum dynamics
Creators: name: Raeisi, Sadegh
name: Wiebe, Nathan
name: Sanders, Barry C.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We construct an efficient autonomous quantum-circuit design algorithm for creating efficient quantum circuits to simulate Hamiltonian many-body quantum dynamics for arbitrary input states. The resultant quantum circuits have optimal space complexity and employ a sequence of gates that is close to optimal with respect to time complexity. We also devise an algorithm that exploits commutativity to optimize the circuits for parallel execution. As examples, we show how our autonomous algorithm constructs circuits for simulating the dynamics of Kitaev's honeycomb model and the Bardeen-Cooper-Schrieffer model of superconductivity. Furthermore we provide numerical evidence that the rigorously proven upper bounds for the simulation error here and in previous work may sometimes overestimate the error by orders of magnitude compared to the best achievable performance for some physics-inspired simulations.
description: 20 Pages, 6 figures
A balanced uniplanar active MMIC combiner/divider with improved power capability
Creators: name: Prieto, D.
name: Rogeaux, E.
name: Villemazet, J.F.
name: Cazaux, Jean-Louis
name: Parra, T.
name: Graffeuil, J
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1998
Subjects: ING-INF/01 Elettronica

description: Present paper deals with a new active uniplanar power combiner/divider which presents major interest for MMICs future applications. Its design takes advantages on uniplanar interconnection technology based on coplanar strips and waveguides (CPS and CPW). Moreover, this circuit allows to realise either a 180° out of phase power combiner or a 180° out of phase power divider. Finally, it offers new potentialities compared to the early published basic circuits, featuring superior electrical performances such as an improved gain value (about 9 dB) and a suitability for an integration in more complete functions as balanced mixers.
Sequential measurement of conjugate variables as an alternative quantum state tomography
Creators: name: Di Lorenzo, Antonio
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: It is shown how it is possible to reconstruct the initial state of a one-dimensional system by measuring sequentially two conjugate variables. The procedure relies on the quasi-characteristic function, the Fourier-transform of the Wigner quasi-probability. The proper characteristic function obtained by Fourier-transforming the experimentally accessible joint probability of observing "position" then "momentum" (or vice versa) can be expressed as a product of the quasi-characteristic function of the two detectors and that, unknown, of the quantum system. This allows state reconstruction through the sequence: data collection, Fourier-transform, algebraic operation, inverse Fourier-transform. The strength of the measurement should be intermediate for the procedure to work.
description: v2, 5 pages, no figures, substantial improvements in the presentation, thanks to an anonymous referee. v3, close to published version
Trace elements concentration in soil and plant within the vicinity of abandoned tanning sites in Bangladesh: an integrated chemometric approach for health risk assessment
Creators: name: Islam, Md. Saiful
name: Kormoker, Tapos
name: Mazumder, Mohini
name: Anika, Suraia Easnur
name: Islam, Md. Towhidul
name: Hemy, Debolina Halder
name: Mimi, Ummah Salma
name: Proshad, Ram
name: Kabir, Md. Humayun
name: Idris, Abubakr M.
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biochemistry
subject: Medicine
subject: Biotechnology
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: FOS: Biological sciences
subject: Plant Biology
subject: Virology

description: An effective toxicological assessment of soil-metal bioavailability and plant translocation processes is needed in view of the growing negative impact of trace element pollution on the terrestrial environment and human health. This study was conducted to assess the toxicological processes that regulate the plants’ trace element absorption into their tissues, the suitability for human use, the potential sources of trace elements, and the risk to human health, using an integrated research methodology. Soils and sweet potato plants were collected from agricultural fields near the tannery waste disposal sites of Dhaka City, Bangladesh and inductively coupled plasma mass spectrometers (ICP-MS) were used to analyze the essential and toxic elements. The mean concentrations of total elements in soil followed the descending order of Fe > Zn > Mn > Cr > Ni > Pb > Cu > As > Cd and in plant Fe > Zn > Cu > Cr > Ni > Mn > Pb > As > Cd. In the edible tissues of sweet potato, the concentrations of essential and toxic elements exceeded the maximum permissible levels, indicating not safe for human consumption. The translocation factor (TF) revealed that studied elements are more accumulated in the leaves than tubers. The enrichment factor revealed minimal to very high enrichment of essential and toxic elements in the plant parts while the contamination factor showed low to very high contamination. Considering the health risk of toxic elements from plant samples, As and Pb caused non-cancer and cancer risk on human health. However, the present results suggested that regular monitoring of these essential and toxic elements in soil and plants as well as other food materials around the abandoned tannery waste disposal sites are necessary to prevent excessive build-up of these elements in the food chain.
Tidal torque induced by orbital decay in compact object binaries
Creators: name: Dall'Osso, Simone
name: Rossi, Elena M.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: As we observe in the moon-earth system, tidal interactions in binary systems can lead to angular momentum exchange. The presence of viscosity is generally regarded as the condition for such transfer to happen. In this paper, we show how the orbital evolution can cause a persistent torque between the binary components, even for inviscid bodies. This preferentially occurs at the final stage of coalescence of compact binaries, when the orbit shrinks successively by gravitational waves and plunging on a timescale shorter than the viscous timescale. The total orbital energy transferred to the secondary by this torque is ~0.01 of its binding energy. We further show that this persistent torque induces a differentially rotating quadrupole perturbation. Specializing to the case of a secondary neutron star, we find that this non equilibrium state has an associated free energy of 10^47-10^48 erg, just prior to coalescence. This energy is likely stored in internal fluid motions, with a sizable amount of differential rotation. By tapping this free energy reservoir, a preexisting weak magnetic field could be amplified up to a strength of ~10^15 Gauss. Such a dynamically driven tidal torque can thus recycle an old neutron star into a highly magnetized neutron star, with possible observational consequences at merger.
description: 14 pages, 8 figures, new sections added, accepted on Sept.19, published on MNRAS
A GaAs multi-function X-band MMIC for space-based SAR application with 7 BIT phase and amplitude control
Creators: name: De Boer, A.
name: Van Der Graaf, M.W.
name: De Hek, A.P.
name: Tieman, T.C.B.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1998
Subjects: ING-INF/01 Elettronica

description: The design and performance of a low power GaAs multi-function X-band MMIC for space-based synthetic aperture radar (SAR) application with 7 bit phase and amplitude control, is described. The multi-function chip (MFC) consists of switches for selection of the transmit or receive mode, a 7-bit phase shifter, a 7-bit attenuator and several amplifiers. The MFC frequency range is 9 to 11 GHz for both transmit and receive. The phase setting of the MFC is from 0° to 360° with an accuracy better than ± 3°. The gain setting range is more than 20dB with an accuracy smaller than ± 0.21 dB. The input and output return losses are better than 14 dB for all ports. The gain for transmit and receive is 3 dB. The noise figure for the receive chain is better than 4.5 dB with a third order intercept point of 13.5 dBm. The P-ldB compression point of the transmit chain is better than 14 dBm. The bias supply voltages are +5 and -5 Volts. The total power consumption of the chip is about 0.3 Watt regardless of the transmit or receive mode. The size of the MFC is 4.2 x 4.2 mm2. The integration of functions combined with the low power consumption and the excellent specifications, are making this multi-function chip extremely suitable for future high performance space-based synthetic aperture and phased-array radars.
Finite-Size Scaling Analysis of the Eigenstate Thermalization Hypothesis in a One-Dimensional Interacting Bose gas
Creators: name: Ikeda, Tatsuhiko N.
name: Watanabe, Yu
name: Ueda, Masahito
Publisher: name: arXiv
Year: 2012
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: By calculating correlation functions for the Lieb-Liniger model based on the algebraic Bethe ansatz method, we conduct a finite-size scaling analysis of the eigenstate thermalization hypothesis (ETH) which is considered to be a possible mechanism of thermalization in isolated quantum systems. We find that the ETH in the weak sense holds in the thermodynamic limit even for an integrable system although it does not hold in the strong sense. Based on the result of the finite-size scaling analysis, we compare the contribution of the weak ETH to thermalization with that of yet another thermalization mechanism, the typicality, and show that the former gives only a logarithmic correction to the latter.
description: 5 pages, 3 figures
Pre-commercial thinning and repeated fertilization of young lodgepole pine stands : long-term impacts on tree growth, plant diversity, and range
Creators: name: Lindgren, Pontus Maurits Fredrik
Publisher: name: University of British Columbia
Year: 2013

description: The 16-year research program studied the impacts of pre-commercial thinning (PCT) and fertilization on tree growth, plant diversity, forage production, and ungulate habitat use. Ecological effects of cattle grazing were also studied. Three study areas were located in south-central British Columbia, Canada. Each study area was comprised of densely stocked stands of young lodgepole pine (Pinus contorta Dougl. ex Loud. var. latifolia Engelm.) thinned to 250, 500, 1000, and 2000 stems/ha. Half of each thinned unit was fertilized five times over 10 years. An unthinned stand completed the experimental design. Fifteen-year increments of crop-tree diameter at breast height (DBH) as well as tree and stand volume were enhanced by fertilization, but not by density level. Non crop trees became abundant, particularly within the heavily thinned stands. Fertilization enhanced herb abundance but decreased herb and shrub diversity, at least temporarily. Plant species richness was unaffected by density levels or fertilization. Structural diversity of the tree layer was greater in the heavily than lightly thinned stands, and overall structural diversity was enhanced by fertilization. Forage yield was enhanced by fertilization, but only within heavily thinned stands. Fertilization also resulted in increased crude protein levels of pinegrass (Calamagrostis rubescens Buckley), an important forage for cattle (Bos taurus L.) for up to six years after the final fertilization. Habitat use by cattle was enhanced by both fertilization and PCT, and this increased use did not appear to have any negative impacts on the native ungulates using these stands. Relative to ungrazed plots, cattle grazing increased both richness and diversity of herbs and shrubs within fertilized stands, whereas grazing decreased shrub richness within unfertilized stands. Results indicated that increased forest and range productivity is possible with treatments of repeated fertilization and, to a lesser extent, PCT. Ecological effects and management implications of these treatments are discussed.
J-band 16 watt HFET amplifier module for very high power applications
Creators: name: Calori, M.
name: Graffitti, R.
name: Marescialli, L .
name: Proietti, C.
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1998
Subjects: ING-INF/01 Elettronica

description: In this work we report on the design and construction of a three stage J-band (10-10.5 GHz) high power amplifier based on 0.4 um gate-length HFET devices. In particular we will demonstrate that by means of a Micro Hybrid Integrated Circuits (MHIC) approach, power amplifier with Pout=16 W, Gass=19 dB @ ldBc and n|=27% can be routinely achieved.
Random ballistic growth and diffusion in symmetric spaces
Creators: name: Gorsky, A.
name: Nechaev, S.
name: Santachiara, R.
name: Schehr, G.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mathematical Physics (math-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Probability (math.PR)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Sequential ballistic deposition (BD) with next-nearest-neighbor (NNN) interactions in a N-column box is viewed a time-ordered product of N\times N-matrices consisting of a single sl_2-block which has a random position along the diagonal. We relate the uniform BD growth with the diffusion in the symmetric space H_N=SL(N,R)/SO(N). In particular, the distribution of the maximal height of a growing heap is connected with the distribution of the maximal distance for the diffusion process in H_N. The coordinates of H_N are interpreted as the coordinates of particles of the one--dimensional Toda chain. The group-theoretic structure of the system and links to some random matrix models are also discussed.
description: 29 pages, 7 figures. Revised and published version. To appear in Nuclear Physics B
On Berry's conjectures about the stable order in PCF
Creators: name: Müller, Fritz
Publisher: name: arXiv
Year: 2011
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences
subject: F.3.2; F.4.1

description: PCF is a sequential simply typed lambda calculus language. There is a unique order-extensional fully abstract cpo model of PCF, built up from equivalence classes of terms. In 1979, Gérard Berry defined the stable order in this model and proved that the extensional and the stable order together form a bicpo. He made the following two conjectures: 1) "Extensional and stable order form not only a bicpo, but a bidomain." We refute this conjecture by showing that the stable order is not bounded complete, already for finitary PCF of second-order types. 2) "The stable order of the model has the syntactic order as its image: If a is less than b in the stable order of the model, for finite a and b, then there are normal form terms A and B with the semantics a, resp. b, such that A is less than B in the syntactic order." We give counter-examples to this conjecture, again in finitary PCF of second-order types, and also refute an improved conjecture: There seems to be no simple syntactic characterization of the stable order. But we show that Berry's conjecture is true for unary PCF. For the preliminaries, we explain the basic fully abstract semantics of PCF in the general setting of (not-necessarily complete) partial order models (f-models.) And we restrict the syntax to "game terms", with a graphical representation.
description: submitted to LMCS, 39 pages, 23 pstricks/pst-tree figures, main changes for this version: 4.1: proof of game term theorem corrected, 7.: the improved chain conjecture is made precise, more references added
Turbulence and Radio Mini-halos in the Sloshing Cores of Galaxy Clusters
Creators: name: ZuHone, John
name: Markevitch, Maxim
name: Brunetti, Gianfranco
name: Giacintucci, Simona
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: A number of relaxed, cool-core galaxy clusters exhibit diffuse, steep-spectrum radio sources in their central regions, known as radio mini-halos. It has been proposed that the relativistic electrons responsible for the emission have been reaccelerated by turbulence generated by the sloshing of the cool core gas. We present a high-resolution MHD simulation of gas sloshing in a galaxy cluster coupled with subgrid simulations of relativistic electron acceleration to test this hypothesis. Our simulation shows that the sloshing motions generate turbulence on the order of $δ{v} \sim$ 50-200 km s$^{-1}$ on spatial scales of $\sim$50-100 kpc and below in the cool core region within the envelope of the sloshing cold fronts, whereas outside the cold fronts, there is negligible turbulence. This turbulence is potentially strong enough to reaccelerate relativistic electron seeds (with initial $γ\sim 100-500$) to $γ\sim 10^4$ via damping of magnetosonic waves and non-resonant compression. The seed electrons could remain in the cluster from, e.g., past AGN activity. In combination with the magnetic field amplification in the core, these electrons then produce diffuse radio synchrotron emission that is coincident with the region bounded by the sloshing cold fronts, as indeed observed in X-rays and the radio. The result holds for different initial spatial distributions of preexisting relativistic electrons. The power and the steep spectral index ($α\approx 1-2$) of the resulting radio emission are consistent with observations of minihalos, though the theoretical uncertainties of the acceleration mechanisms are high. We also produce simulated maps of inverse-Compton hard X-ray emission from the same population of relativistic electrons.
description: 28 pages, 29 figures, in emulateapj format. Revised version accepted by the referee, conclusions unchanged
The Daimler-Benz research centre in India: an overview
Creators: name: Bhagavathula, Seshu
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1998
Subjects: ING-INF/01 Elettronica

description: Internationalization of industries brings new dimension to the way the companies do business in future and some companies, although most of them have been using this only on cost or political grounds, have really analyzed the parameters that would benefit such an endeavor. Taking the Daimler-Benz Research Centre India as an example, the present paper analyzes various factors that have been considered by Daimler-Benz AG, Germany, in setting up the third research center outside of Germany. The paper generalizes some of the considerations, as far as possible, so as to make the contents of the paper more applicable to larger context
Supplement to LLF580, an FGF21 Analog, Reduces Triglycerides and Hepatic Fat in obese adults with modest hypertriglyceridemia
Creators: name: Goldfine, Allison
Publisher: name: Zenodo
Year: 2021
Subjects: Fibroblast growth factor 21 (FGF21), Hypertriglyceridemia, Obesity, Nonalcoholic Fatty Liver Diseases (NAFLD), Metabolism

description: Supplemental information to the manuscript entitled "LLF580, an FGF21 Analog, Reduces Triglycerides and Hepatic Fat in Obese Adults with Modest Hypertriglyceridemia"
description: {"references": ["Rader DJ, Maratos-Flier E, Nguyen A, Hom D, Ferriere M, Li Y, Kompa J, Martic M, Hinder M, Basson CT, Yowe D, Diener J, Goldfine AB; CLLF580X2102 study team. LLF580, an FGF21 Analog, Reduces Triglycerides and Hepatic Fat in obese adults with modest hypertriglyceridemia. J Clin Endocrinol Metab. 2021 Aug 25:dgab624. doi: 10.1210/clinem/dgab624. Epub ahead of print. PMID: 34431493."]}
Formally self-adjoint quasi-differential operators and boundary value problems
Creators: name: Goriunov, Andrii
name: Mikhailets, Vladimir
name: Pankrashkin, Konstantin
Publisher: name: arXiv
Year: 2012
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 34B05, 34L40, 34B38, 47N20

description: We develop the machinery of boundary triplets for one-dimensional operators generated by formally self-adjoint quasi-differential expression of arbitrary order on a finite interval. The technique are then used to describe all maximal dissipative, accumulative and self-adjoint extensions of the associated minimal operator and its generalized resolvents in terms of the boundary conditions. Some specific classes are considered in greater detail.
description: Extended and revised version. Results concerning regularization by quasi-derivatives of formal differential operators with distributional coefficients were added. 13 pages
Mineralogy and geochemistry of pegmatites on Mount Begbie, British Columbia
Creators: name: Dixon, Andrea
Publisher: name: University of British Columbia
Year: 2013

description: The pegmatite field on Mount Begbie, near Revelstoke, B.C., is a Li-rich pegmatite field in the southern Canadian Cordillera that is relatively well-known among prospectors, but until now, under-studied by academics. Mapping the pegmatite field on the northeastern slope of the mountain revealed a dense population of S-type granitic pegmatites belonging to the LCT family with diverse ranges of mineralogy corresponding to barren, beryl-columbite, beryl-columbite-phosphate, and lepidolite-subtype compositions. Typically, the pegmatites are not strongly metamorphosed and show only rare foliation, meaning they primarily postdate the exhumation of the Thor-Odin Culmination that occurred during the Late Paleocene to Early Eocene. They are likely related to other granitic bodies (i.e., the Ladybird granite suite) resulting from the exhumation event rather than any other known intrusions in the Monashee complex. The dikes in the study area are elongate, with most at least 10 m long and are usually not more than one meter wide; the largest is approximately 520 m long and 10 m wide. Orientations of the pegmatites are dictated in part by conjugate shear planes developed in the host rock prior to the emplacement of the dikes; nearly all strike between 295° and 330° and have a subvertical dip. Fractionation is variable within the most primitive of the pegmatites and it may be controlled by localized fluid accumulation or the composition of the original source rock. Despite variability, fractionation within the pegmatite field increases from the southeast to the northwest, suggesting the source pluton may be located to the southeast of the study area at depth. Detailed examination of the minerals tourmaline, sekaninaite, beryl, rare-element oxides, and zircon as well as the mostly qualitative study of phosphates and other minerals provides insight into the geochemistry and mineralogy of the individual dikes. The results suggest that some of the primitive dikes are more fractionated than they appear and highlight other pegmatites as having unusual compositions for typical beryl-columbite and beryl-columbite-phosphate-subtype pegmatites. Elevated contents of Be and Li in sekaninaite and the presence of qitianlingite in the Mount Begbie pegmatite field are somewhat unique compared to other cordierite and rare-element oxide localities worldwide.
Getting students into central Europe  - a postgraduate degree programme at the GhK with special emphasis on a Kenya co-operation
Creators: name: Kompa, Günter
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 1998
Subjects: ING-INF/01 Elettronica

description: Increasing globalization of the market is a challenge for international cooperation and partnership in higher education and research, especially in electrical engineering. New study programmes which take care of these new developments are attractive for young engineers both from the highly industrialized countries and the less industrialized and developing countries. The rapid growth in communications offers new opportunities for international teamworking.
Sharp estimates for metastable lifetimes in parabolic SPDEs: Kramers' law and beyond
Creators: name: Berglund, Nils
name: Gentz, Barbara
Publisher: name: arXiv
Year: 2012
Subjects: subject: Probability (math.PR)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 60H15, 35K57 (Primary) 60J45, 37H20 (Secondary)

description: We prove a Kramers-type law for metastable transition times for a class of one-dimensional parabolic stochastic partial differential equations (SPDEs) with bistable potential. The expected transition time between local minima of the potential energy depends exponentially on the energy barrier to overcome, with an explicit prefactor related to functional determinants. Our results cover situations where the functional determinants vanish owing to a bifurcation, thereby rigorously proving the results of formal computations announced in [Berglund and Gentz, J. Phys. A 42:052001 (2009)]. The proofs rely on a spectral Galerkin approximation of the SPDE by a finite-dimensional system, and on a potential-theoretic approach to the computation of transition times in finite dimension.
description: 64 pages, 4 figures
Immigration-unemployment relationship: evidence from five Australian states
Creators: name: Xu, Hao
Publisher: name: Macquarie University
Year: 2022
Subjects: classificationCode: 399999
subject: Other education not elsewhere classified

description: Immigration to Australia has contributed around 50 per cent of population growth over the last twenty years. The economic consequences of immigration are of great concern not only for policy-makers but also for local workers. Using a system of equations for real gross state product, real wage, immigration rate and unemployment rate for five Australian states (New South Wales, Queensland, Victoria, South Australia and Western Australia), this study suggests that the economic impacts of immigration varies by states and by estimation methods. This study finds that immigrants are not displacing locals’ jobs. In the long-run, this study reveals significant negative relationships between immigration and unemployment in New South Wales, Victoria and Western Australia. The short-run error correction models reveal when the unemployment rate of NSW and VIC exceeds the long-run equilibrium level, they would readjust to equilibrium with approximately 12.84 per cent and 27 per cent respectively in the current period. For WA, the long-run decreasing trend of unemployment attracts immigrants. In general, immigration contributes to the permanent expansion of the Australian economy and reduces the unemployment rate.
Kastor-Traschen Black Holes, Null Geodesics and Conformal Circles
Creators: name: Casey, Stephen
Publisher: name: arXiv
Year: 2011
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Differential Geometry (math.DG)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: The Kastor-Traschen metric is a time-dependent solution of the Einstein-Maxwell equations with positive cosmological constant $Λ$ which can be used to describe an arbitrary number of charged dynamical black holes. In this paper, we consider the null geodesic structure of this solution, in particular, focusing on the projection to the space of orbits of the timelike conformal retraction. It is found that these projected light rays arise as integral curves of a system of third order ordinary differential equations. This system is not uniquely defined, however, and we use the inherent freedom to construct a new system whose integral curves coincide with the projection of distinguished null curves of Kastor-Traschen arising from a magnetic flow. We discuss our results in the one-centre case and demonstrate a link to conformal circles in the limit $Λ\rightarrow 0$. We also show how to construct analytic expressions for the projected null geodesics of this metric by exploiting a well-known diffeomorphism between the K-T metric and extremal Reissner-Nordstrom deSitter. We make some remarks about the two-centre solution and demonstrate a link with the one-centre case.
description: 24 pages, 11 figures
Macroscopic Quantum Self-Trapping in Dynamical Tunnelling
Creators: name: Wüster, Sebastian
name: Dabrowska-Wüster, Beata J.
name: Davis, Matthew J.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: It is well-known that increasing the nonlinearity due to repulsive atomic interactions in a double-well Bose-Einstein condensate suppresses quantum tunnelling between the two sites. Here we find analogous behaviour in the dynamical tunnelling of a Bose-Einstein condensate between period-one resonances in a single driven potential well. For small nonlinearities we find unhindered tunnelling between the resonances, but with an increasing period as compared to the non-interacting system. For nonlinearities above a critical value we generally observe that the tunnelling shuts down. However, for certain regimes of modulation parameters we find that dynamical tunnelling re-emerges for large enough nonlinearities, an effect not present in spatial double-well tunnelling. We develop a two-mode model in good agreement with full numerical simulations over a wide range of parameters, which allows the suppression of tunnelling to be attributed to macroscopic quantum self-trapping.
description: 5 pages, 3 figures
Paraholotrichia Lacroix & Coache 2017
Creators: name: Allsopp, Peter G.
name: Schoolmeesters, Paul
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Paraholotrichia

description: Paraholotrichia Lacroix & Coache, 2017b
[1 species].
Type species Paraholotrichia rainoni Lacroix & Coache, 2017, 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 131, DOI: 10.11646/megataxa.12.1.2, http://zenodo.org/record/14984437
Metacognitive genre awareness as cognitive tool for improving expository essay in EFL: using SFL genre based instruction
Creators: name: Kim, Min Jung
Publisher: name: Macquarie University
Year: 2022
Subjects: classificationCode: 399999
subject: Other education not elsewhere classified

description: The development of writing ability in EFL tertiary level college students depends on multicomponent elements. The body of genre research can shed light on the development of L2 writing in both an ESL and EFL context because teaching genre knowledge can also provide L2 writers with some sense of what they write, to whom they write, and for what purpose. As a result, genre-based writing instructions can benefit L2 student writers, especially in an EFL context, and help to build sufficient genre knowledge so they can then apply it to their own written contexts. The current study draws upon the notion of Systemic Functional Linguistics (SFL), which views language as a meaning making potential within a specific cultural context rather than a set of fixed rules or structures, and investigates how the genre-based approach framed by SFL can increase the expository writing skill of EFL students. This study was conducted in a Korean university with 62 second -year college students. In particular, the development of the writing ability in EFL college students was interpreted through the framework of metacognitive genre awareness. The progress of metacognitive genre awareness is a means to understand the development of the writing ability of EFL tertiary level college students. For mixed methods research, data collection relies on written text data, questionnaire and reflection on the blog and email. A two-way ANOVA and mixed ANOVA were computed in SPSS for findings of the current study, revealing that SFL genre based writing instruction was more effective than a conventional bottom-up writing method in terms of improving expository writing quality of the EFL tertiary level college students regardless of their previous writing competency.
Fast method for quantum mechanical molecular dynamics
Creators: name: Niklasson, Anders M. N.
name: Cawkwell, Marc J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Chemical Physics (physics.chem-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: With the continuous growth of processing power for scientific computing, first principles Born-Oppenheimer molecular dynamics (MD) simulations are becoming increasingly popular for the study of a wide range of problems in materials science, chemistry and biology. Nevertheless, the computational cost still remains prohibitively large in many cases, particularly in comparison to classical MD simulations using empirical force fields. Here we show how to circumvent the major computational bottleneck in Born-Oppenheimer MD simulations arising from the self-consistent-charge optimization. The optimization-free quantum mechanical MD method is demonstrated for density functional tight-binding theory. The molecular trajectories are almost indistinguishable from an "exact" microcanonical Born-Oppenheimer MD simulation even when linear scaling sparse matrix algebra is used. Our findings drastically reduce the computational gap between classical and quantum mechanical MD simulations.
description: 12 pages, 7 figures
The brain drain a survey of the literature
Creators: name: Giannoccolo, Pierpaolo
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2004
Subjects: SECS-P/04 Storia del pensiero economico

description: This paper reviews the theoretical and empirical literature on Brain Drain (BD). We propose an
ideal path that links the first studies with the most recent ones. In this development, the
literature on BD focuses on a variety of economic and social issues and recalls to national and
international debates.
This paper uses more than 350 articles from a variety of sources. The sources are specialized
professionals journals, internet research engines, governmental publications and newspapers.
In the first part we analyse briefly the BD, its different definitions and the historical roots of the
BD. This part shows that the BD is a wide and complex phenomenon.
In the second part, we propose an ideal path to interpret the literature. This part analyses how
BD is linked to political and social events, according to the Economy.
A Fermionic Top Partner: Naturalness and the LHC
Creators: name: Berger, Joshua
name: Hubisz, Jay
name: Perelstein, Maxim
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Naturalness demands that the quadratic divergence of the one-loop top contribution to the Higgs mass be cancelled at a scale below 1 TeV. This can be achieved by introducing a fermionic (spin-1/2) top partner, as in, for example, Little Higgs models. In this paper, we study the phenomenology of a simple model realizing this mechanism. We present the current bounds on the model from precision electroweak fits, flavor physics, and direct searches at the LHC. The lower bound on the top partner mass from precision electroweak data is approximately 500 GeV, while the LHC bound with 5/fb of data at sqrt(s)=7 TeV is about 450 GeV. Given these bounds, the model can incorporate a 125 GeV Higgs with minimal fine-tuning of about 20%. We conclude that natural electroweak symmetry breaking with a fermionic top partner remains a viable possibility. We also compute the Higgs decay rates into gauge bosons, and find that significant, potentially observable deviations from the Standard Model predictions may occur.
description: 30 pages, 8 figures, 1 table; v2: Minor changes. Final version to appear in JHEP; v3: References added
Veränderte Landschaften - Formen und Funktionen des Landschaftsbildes in Lyrik aus der DDR
Creators: name: Straube, Karl Robert
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2012
Subjects: subject: Online-Publikation
subject: Hochschulschrift
subject: 830

description: In der Studie wird anhand einer literaturgeschichtlichen Einordnung gezeigt, wie eine 'bürgerliche' literarische Tradition des landschaftsbezogenen Gedichts einerseits gezielt für politische Inhalte umfunktioniert, andererseits als Teil eines Formengedächtnisses weitergeschrieben wurde. Dabei wird durch einen detaillierten Blick auf die textuelle Seite des Raumbezugs eine Alternative zu gängigen Lesarten (bis 1990 entlang des deutschdeutschen Systemgegensatzes, danach vornehmlich autobiographisch) erprobt. Welche Formen des lyrischen Sprechens über Landschaft entwickelt wurden, zeigt die Arbeit anhand von Beispielen aus den 1940er bis 1980er Jahren, v.a. von Johannes R. Becher, Peter Huchel, Georg Maurer, Johannes Bobrowski, Heinz Czechowski, Wulf Kirsten und Kito Lorenc. Neben die bekannten Legitimationsmuster Arbeit und Antifaschismus tritt dabei der Bezug auf Vorstellungen von Heimat als wichtiges Element der Affirmation wie der Distanznahme zu politischen Rahmensetzungen hervor.
description: Regarding the long history of German landscape poetry the study shows how this rather bourgeois genre changed after 1945 in terms of the needs of political propaganda, but at the same time it remained relatively stable considering poetic forms. A close examination of the linguistic surface of respective conceptions of space and landscape provides an alternative view on texts, which have predominantly been read with a focus on cold war antagonism and/or autobiographic issues. Poems by Johannes R. Becher, Peter Huchel, Georg Maurer, Johannes Bobrowski, Heinz Czechowski, Wulf Kirsten, and Kito Lorenc are discussed in order to demonstrate the wide range of subjects and shapes in which landscape poetry was interpreted in GDR literature. Besides the well-known patterns of legitimation like anti-fascism and labour notions of 'Heimat' appear on the scene as a likewise relevant factor in both compliance with and in opposition to the socialist state.
Maximally and minimally correlated states attainable within a closed evolving system
Creators: name: Jevtic, Sania
name: Jennings, David
name: Rudolph, Terry
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The amount of correlation attainable between the components of a quantum system is constrained if the system is closed. We provide some examples, largely from the field of quantum thermodynamics, where knowing the maximal possible variation in correlations is useful. The optimization problem it raises requires us to search for the maximally and minimally correlated states on a unitary orbit, with and without energy conservation. This is fully solvable for the smallest system of two qubits. For larger systems the problem is reduced to a manageable, classical optimization.
description: 5 pages, 1 figure
2D microtubules stained with Alexa647 part 1
Creators: name: Leterrier, Christophe
Publisher: name: Zenodo
Year: 2021
Subjects: shareloc.xyz
shareloc.xyz:dataset
storm
microtubules
alexa-647
2d
smlm

description: Open in Shareloc.XYZ

description: STORM images of microtubules with widefield images, immuno-labeled with Alexa 647. (Uploaded via https://shareloc.xyz)
Law of large numbers for certain cylinder flows
Creators: name: Cirilo, Patricia
name: Lima, Yuri
name: Pujals, Enrique
Publisher: name: arXiv
Year: 2011
Subjects: subject: Dynamical Systems (math.DS)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 37A05, 37A40

description: We construct new examples of cylinder flows, given by skew product extensions of irrational rotations on the circle, that are ergodic and rationally ergodic along a subsequence of iterates. In particular, they exhibit law of large numbers. This is accomplished by explicitly calculating, for a subsequence of iterates, the number of visits to zero, and it is shown that such number has a gaussian distribution.
description: 25 pages, referee suggestions incorporated, to appear in Ergodic Theory and Dynamical Systems
A Measurement of the Correlation of Galaxy Surveys with CMB Lensing Convergence Maps from the South Pole Telescope
Creators: name: Bleem, L. E.
name: van Engelen, A.
name: Holder, G. P.
name: Aird, K. A.
name: Armstrong, R.
name: Ashby, M. L. N.
name: Becker, M. R.
name: Benson, B. A.
name: Biesiadzinski, T.
name: Brodwin, M.
name: Busha, M. T.
name: Carlstrom, J. E.
name: Chang, C. L.
name: Cho, H. M.
name: Crawford, T. M.
name: Crites, A. T.
name: de Haan, T.
name: Desai, S.
name: Dobbs, M. A.
name: Doré, O.
name: Dudley, J.
name: Geach, J. E.
name: George, E. M.
name: Gladders, M. D.
name: Gonzalez, A. H.
name: Halverson, N. W.
name: Harrington, N.
name: High, F. W.
name: Holden, B. P.
name: Holzapfel, W. L.
name: Hoover, S.
name: Hrubes, J. D.
name: Joy, M.
name: Keisler, R.
name: Knox, L.
name: Lee, A. T.
name: Leitch, E. M.
name: Lueker, M.
name: Luong-Van, D.
name: Marrone, D. P.
name: Martinez-Manso, J.
name: McMahon, J. J.
name: Mehl, J.
name: Meyer, S. S.
name: Mohr, J. J.
name: Montroy, T. E.
name: Natoli, T.
name: Padin, S.
name: Plagge, T.
name: Pryke, C.
name: Reichardt, C. L.
name: Rest, A.
name: Ruhl, J. E.
name: Saliwanchik, B. R.
name: Sayre, J. T.
name: Schaffer, K. K.
name: Shaw, L.
name: Shirokoff, E.
name: Spieler, H. G.
name: Stalder, B.
name: Stanford, S. A.
name: Staniszewski, Z.
name: Stark, A. A.
name: Stern, D.
name: Story, K.
name: Vallinotto, A.
name: Vanderlinde, K.
name: Vieira, J. D.
name: Wechsler, R. H.
name: Williamson, R.
name: Zahn, O.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We compare cosmic microwave background lensing convergence maps derived from South Pole Telescope (SPT) data with galaxy survey data from the Blanco Cosmology Survey, the Wide-field Infrared Survey Explorer, and a new large Spitzer/IRAC field designed to overlap with the SPT survey. Using optical and infrared catalogs covering between 17 and 68 square degrees of sky, we detect correlation between the SPT convergence maps and each of the galaxy density maps at >4 sigma, with zero cross-correlation robustly ruled out in all cases. The amplitude and shape of the cross-power spectra are in good agreement with theoretical expectations and the measured galaxy bias is consistent with previous work. The detections reported here utilize a small fraction of the full 2500 square degree SPT survey data and serve as both a proof of principle of the technique and an illustration of the potential of this emerging cosmological probe.
Country size and the price of tradeables: is there any relationship beyond wishful thinking?
Creators: name: Mantovani, Andrea
name: Rossini, Gianpaolo
name: Zanghieri, Paolo
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2002
Subjects: SECS-P/08 Economia e gestione delle imprese

description: The existence of transport costs among countries makes prices of tradables diverge. When the market structure is a differentiated oligopoly the prices of tradables increase as a country get larger and/or richer. In a framework of economies of scale-di¤erentiation-monopolistic competition a less definite result can be found, since it all depends on the level of transport costs and the degree of openess. First we go through some theoretical aspects of these different approaches. Then, we provide empirical tests that may be able to discriminate among the two competing approaches. The results show that a relationship exists between size, percapita incomes and prices of tradables in countries separated by some transport cost. As a country is larger prices are lower, yet they become higher if percapita income is higher.