cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A New Dual Band E-shaped Slot Antenna Design for Wireless Applications
Creators: name: Ali, Jawad K.
Publisher: name: figshare
Year: 2020
Subjects: subject: 90699 Electrical and Electronic Engineering not elsewhere classified
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: An E-shaped printed slot antenna is presented as a candidate to cover dual-band operation over the entire wireless local area network (WLAN) frequency bands of 2.4 - 2.5 GHz and 4.9 - 5.8 GHz. The E-shaped slot structure has been etched in the ground plane, and the 50 microstrip line feed is etched on the reverse side of the substrate. An additional trapezoidal slot has been etched attached to the slot structure on the feeding side to facilitate tuning and the dual-band operation. The antenna structure has been modeled and its performance has been evaluated using a method of moment based electromagnetic simulator, IE3D from Zeland Software Inc. Simulation results show that, the proposed antenna offers good return loss response (for S11 less than -10 dB) at the two bands. The ratio of the two resonating frequencies f02=f01 could be varied in a considerable range, without changing the antenna external dimensions, making the antenna suitable for other dual band wireless applications.
The Soybean Sector in the 1970's: An Analysis of Price Variability
Creators: name: Langley, Suchada V.
name: Meyers. William, H.
name: Langley, Suchada V.
name: Meyers. William, H.
Publisher: name: Unknown
Year: 1980
Subjects: Crop Production/Industries

description: Price variability in the 1970's is analyzed for the soybean sector using structural and time series models. The impact of changes in predetermined variables on the price level is analyzed with the structural model. Supply factors, trade factors and domestic demand factors are evaluated over the period 1971 to 1977.
Storing quantum information using dark state polaritons
Creators: name: Johnsson, Mattias
name: Moelmer, Klaus
Publisher: name: arXiv
Year: 2003
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The possibility of using a solid medium to store few-photon laser pulses as coupled excitations between light and matter is investigated. The role of inhomogeneous broadening and nonadiabaticity are considered, and conditions governing the feasibility of the scheme are derived. The merits of a number of classes of solid are examined.
description: 8 pages, 1 figure
Relation between the High Density Phase and the Very-High Density Phase of Amorphous Solid Water
Creators: name: Giovambattista, Nicolas
name: Stanley, H. Eugene
name: Sciortino, Francesco
Publisher: name: arXiv
Year: 2004
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: It has been suggested that high-density amorphous (HDA) ice is a structurally arrested form of high-density liquid (HDL) water, while low-density amorphous (LDA) ice is a structurally arrested form of low-density liquid (LDL) water. Recent experiments and simulations have been interpreted to support the possibility of a second "distinct" high-density structural state, named very high-density amorphous (VHDA) ice, questioning the LDL-HDL hypothesis. We test this interpretation using extensive computer simulations, and find that VHDA is a more stable form of HDA and that in fact VHDA should be considered as the amorphous ice of the quenched HDL.
description: 5 pages, 4 figs
Spectral characteristics of the black hole binary 4U 1957+115: A multi-mission perspective
Creators: name: Mudambi, Sneha Prakash
name: Gudennavar, S. B.
name: Misra, R.
name: Bubbly, S. G.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We report spectral analysis of the persistent black hole X-ray binary, 4U 1957+115, using AstroSat, Swift and NuSTAR observations carried out between 2016-2019. Modelling with a disk emission, thermal comptonization and blurred reflection components revealed that the source was in the high soft state with the disk flux $\sim 87$ % of the total and high energy photon index $\sim2.6$. There is an evidence that either the inner disk radius varied by $\sim25$ % or the colour hardening factor changed by $\sim12$ %. The values of the inner disk radius imply that for a non-spinning black hole, the black hole mass is $<7$ M$_\odot$ and the source is located $>30 $ kpc away. On the other hand, a rapidly spinning black hole would be consistent with the more plausible black hole mass of $< 10$ M$_\odot$ and a source distance of $\sim10$ kpc. Fixing the distance to $10$ kpc and using a relativistic accretion disk model, constrained the black hole mass to 6 M$_\odot$ and inclination angle to 72$^{\circ}$. A positive correlation is detected between the accretion rate and inner radii or equivalently between the accretion rate and colour factor.
description: 8 Pages, 4 figures and 3 Tables. Accepted for publication in Monthly Notices of Royal Astronomical Society (MNRAS)
Josephson vortex interaction mediated by cavity modes: Tunable coupling for superconducting qubits
Creators: name: Fistul, M. V.
name: Ustinov, A. V.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A quantum-mechanical model for the interaction of Josephson vortices (fluxons) embedded in superconducting transmission line is presented. The vortices interact through emission and absorption of linear waves (electromagnetic cavity modes). We show that in a classical regime this peculiar type of interaction is determined by the product of instantaneous velocities of fluxons. In a quantum regime, this property provides tunable coupling between vortices which can be used for entanglement of vortex qubits. The physical mechanism of the vortex interaction is similar to that proposed for qubits based on trapped ions. Different types of transmission lines mediating the vortex interaction are proposed.
description: 4 pages, 2 figures
Methods for detection and analysis of weak radio sources with single-dish radio telescopes
Creators: name: Marongiu, M.
name: Pellizzoni, A.
name: Egron, E.
name: Laskar, T.
name: Giroletti, M.
name: Loru, S.
name: Melis, A.
name: Carboni, G.
name: Guidorzi, C.
name: Kobayashi, S.
name: Jordana-Mitjans, N.
name: Rossi, A.
name: Mundell, C. G.
name: Concu, R.
name: Martone, R.
name: Nicastro, L.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The detection of mJy/sub-mJy point sources is a significant challenge for single-dish radio telescopes. Detection or upper limits on the faint afterglow from GRBs or other sources at cosmological distances are important means of constraining the source modeling. Using the Sardinia Radio Telescope (SRT), we compare the sensitivity and robustness of three methods applied to the detection of faint radio sources from raster maps around a known source position: the smart quick-look method, the source extraction method (typical of high-energy astronomy), and the fit with a 2-D Gaussian. We developed a Python code specific for the analysis of point-like radio sources applied to the SRT C-band (6.9 GHz) observations of both undetected sources (GRB afterglows of 181201A and 190114C) and the detected Galactic X-ray binary GRS 1915+105. Our comparative analysis of the different detection methods made extensive use of simulations as a useful complement to actual radio observations. The best method for the SRT data analysis is the fit with a 2-D Gaussian, as it pushes down the sensitivity limits of single-dish observations -- with respect to more traditional techniques -- to ~ 1.8 mJy, improving by ~ 40 % compared with the initial value. This analysis shows that -- especially for faint sources -- good maps of the scanned region pre- or post-outburst are essential.
description: 22 pages, 11 figures, 3 tables, pre-print of an article published in Experimental Astronomy; v2: updated abstract and references
Amblysaphes striatus Bates 1885
Creators: name: Monné, Miguel A.
Publisher: name: Zenodo
Year: 2005
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Cerambycidae
Amblysaphes
Amblysaphes striatus

description: 1. Amblysaphes striatus Bates, 1885
Type locality — Guatemala, Alta Verapaz: Telemán. (BMNH). Distribution — Guatemala, Costa Rica.
 Amblysaphes striatus Bates, 1885: 382, pl. 23, fig. 13; Chemsak et al., 1992: 131 (cat.).
  Anasillus Marinoni & Martins, 1978
 Anasillus Marinoni & Martins, 1978: 183.
 Type­species — Anasillus crinitus Marinoni & Martins, 1978 (original designation).
description: Published as part of Monné, Miguel A., 2005, Catalogue of the Cerambycidae (Coleoptera) of the Neotropical Region. Part II. Subfamily Lamiinae, pp. 1-760 in Zootaxa 1023 (1) on pages 1-760, DOI: 10.11646/zootaxa.946.1.1, http://zenodo.org/record/5049553
A best practices review of simulated education approaches to enhance collaborative healthcare
Creators: name: Murdoch, Natalie L.
Publisher: name: The University of British Columbia
Year: 2012

description: Interprofessional simulation can provide health professional program educators with an effective means to prepare future practitioners to engage in meaningful collaboration. This systematic literature review was conducted to identify best practices recommendations to enhance collaborative healthcare using interprofessional simulated education innovations for learners in pre-licensure nursing programs and other health profession programs. Using a systematic review methodology, 375 articles were reviewed and 17 studies met the inclusion criteria. Based on the methodological strength of the research and the impact of the simulation innovations, the following simulation techniques were recommended: high-fidelity human patient simulators, role play, and didactic lecture and audience response didactic lecture, both followed by role play with a standardized patient. One approach used in interprofessional education simulations, instructor modeling, was related to particularly positive outcomes for learners. Instructor modeling demonstrated significant results for achieving interprofessional competencies when compared to no modeling. Future research is needed to identify the optimal timing for implementing interprofessional education innovations, for the development of interprofessional collaborative evaluation tools, and to determine the effects of collaborative practice on patient care. Research on the effectiveness of interprofessional simulation would be strengthened with innovations and evaluations based on educational models and learning theories.
New Optimization Methods for Converging Perturbative Series with a Field Cutoff
Creators: name: Kessler, B.
name: Li, L.
name: Meurice, Y.
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We take advantage of the fact that in lambda phi ^4 problems a large field cutoff phi_max makes perturbative series converge toward values exponentially close to the exact values, to make optimal choices of phi_max. For perturbative series terminated at even order, it is in principle possible to adjust phi_max in order to obtain the exact result. For perturbative series terminated at odd order, the error can only be minimized. It is however possible to introduce a mass shift in order to obtain the exact result. We discuss weak and strong coupling methods to determine the unknown parameters. The numerical calculations in this article have been performed with a simple integral with one variable. We give arguments indicating that the qualitative features observed should extend to quantum mechanics and quantum field theory. We found that optimization at even order is more efficient that at odd order. We compare our methods with the linear delta-expansion (LDE) (combined with the principle of minimal sensitivity) which provides an upper envelope of for the accuracy curves of various Pade and Pade-Borel approximants. Our optimization method performs better than the LDE at strong and intermediate coupling, but not at weak coupling where it appears less robust and subject to further improvements. We also show that it is possible to fix the arbitrary parameter appearing in the LDE using the strong coupling expansion, in order to get accuracies comparable to ours.
description: 10 pages, 16 figures, uses revtex; minor typos corrected, refs. added
Guidelines for Making Commercial Wheat Storage Decisions
Creators: name: Trapp, James N.
name: Trapp, James N.
Publisher: name: Unknown
Year: 1980
Subjects: Crop Production/Industries

description: Wheat storage profit potential was estimated to be highest when the supply/demand ratio for wheat is low and stocks are declining. Specifically, supply/demand ratios less then 1.5 imply positive returns and each one million bushel decline in stocks, certeris paribus, increases the rate of return by .05 percent.
The variational principle and effective action for a spherical dust shell
Creators: name: Gladush, Valentin
Publisher: name: arXiv
Year: 2003
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The variational principle for a spherical configuration consisting of a thin spherical dust shell in gravitational field is constructed. The principle is consistent with the boundary-value problem of the corresponding Euler-Lagrange equations, and leads to ``natural boundary conditions''. These conditions and the field equations following from the variational principle are used for performing of the reduction of this system. The equations of motion for the shell follow from the obtained reduced action. The transformation of the variational formula for the reduced action leads to two natural variants of the effective action. One of them describes the shell from a stationary interior observer's point of view, another from the exterior one. The conditions of isometry of the exterior and interior faces of the shell lead to the momentum and Hamiltonian constraints.
description: 16 pages, LaTex
Science with the TianQin observatory: Preliminary results on stellar-mass binary black holes
Creators: name: Liu, Shuai
name: Hu, Yi-Ming
name: Zhang, Jian-dong
name: Mei, Jianwei
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study the prospect of using TianQin to detect stellar-mass binary black holes (SBBHs). We estimate the expected detection number as well as the precision of parameter estimation on SBBH inspirals, using five different population models. We note TianQin can possibly detect a few SBBH inspirals with signal to noise ratios greater than 12; lowering the threshold and combining multiple detectors can both boost the detection number. The source parameters can be recovered with good precision for most events above the detection threshold. For example, the precision of the merger time most likely occurs near 1s, making it possible to guide the detection of the ground-based detectors, the precision of the eccentricity $e_0$ most likely occurs near $10^{-4}$, making it possible to distinguish the formation channels, and the precision of the mass parameter is better than $10^{-6}$ in general and most likely occurs near $10^{-7}$. We note, in particular, that for a typical merger event, the error volume is likely to be small enough to contain only the host galaxy, which could greatly help in the study of gravitational wave cosmology and relevant studies through the multimessenger observation.
description: 20 pages, 8 figures, published in Phys. Rev. D
The conformal frame freedom in theories of gravitation
Creators: name: Flanagan, Eanna E.
Publisher: name: arXiv
Year: 2004
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: It has frequently been claimed in the literature that the classical physical predictions of scalar tensor theories of gravity depend on the conformal frame in which the theory is formulated. We argue that this claim is false, and that all classical physical predictions are conformal-frame invariants. We also respond to criticisms by Vollick [gr-qc/0312041], in which this issue arises, of our recent analysis of the Palatini form of 1/R gravity.
description: 9 pages, no figures, revtex; final published version
Protostellar spin-up and fast rotator formation through binary star formation
Creators: name: Kuruwita, Rajika L.
name: Federrath, Christoph
name: Kounkel, Marina
Publisher: name: arXiv
Year: 2024
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: (Edited) Many fast rotator stars (rotation periods of < 2 days) are found in unresolved binaries with separations of tens of au. This correlation leads to the question of whether the formation of binary stars inherently produces fast rotators. We aim to understand whether the formation of companions plays a role in spinning up stars. We use magneto-hydrodynamical simulations to study the formation of multiple star systems from turbulent and non-turbulent protostellar cores. We track the angular momentum accreted by individual star and inner disc systems by using a sink particle technique. We run a resolution study to extrapolate protostellar properties. We find in all simulations that the primary star can experience spin-up events that are correlated with the formation of companions. The primary star can spin up by up to 84% of its pre-fragmentation angular momentum and by up to 18% of its pre-fragmentation mass-specific angular momentum. The mechanism for the spin-up is gravitational disc instabilities in the circumstellar disc around the primary star, leading to the accretion of material with high specific angular momentum. The simulations that experience the strongest disc instabilities fragment to form companions. Simulations with weaker spin-up events experience disc instabilities triggered by a companion flyby, and the disc instability in these cases does not produce further fragments. We conclude that the primary star in multiple star systems may end up with a higher spin than single stars. This is because gravitational instabilities in the circumstellar disc around the primary star can trigger a spin-up event. In the strongest spin-up events, the instability is likely to cause disc fragmentation and the formation of companions. This companion formation coupled with shorter disc lifetimes, because the companion truncates the circumstellar disc, can help produce fast rotators.
description: 14 pages, 11 Figures. Accepted to A&A
Anasillus crinitus Marinoni & Martins 1978
Creators: name: Monné, Miguel A.
Publisher: name: Zenodo
Year: 2005
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Cerambycidae
Anasillus
Anasillus crinitus

description: 1. Anasillus crinitus Marinoni & Martins, 1978
Type locality — Peru, Cajamarca: Jaen. (UPRG). Distribution — Peru.
 Anasillus crinitus Marinoni & Martins, 1978: 183, figs. 6, 7.
  Anoreina Bates, 1861
 Oreodera (Anoreina) Bates, 1861: 149.
 Anoreina; Monné & Giesbert, 1995: 239 (cat.).
 Type­species — Oreodera (Anoreina) nana Bates, 1861 (monotypy).
description: Published as part of Monné, Miguel A., 2005, Catalogue of the Cerambycidae (Coleoptera) of the Neotropical Region. Part II. Subfamily Lamiinae, pp. 1-760 in Zootaxa 1023 (1) on pages 1-760, DOI: 10.11646/zootaxa.946.1.1, http://zenodo.org/record/5049553
FACTORS ASSOCIATED WITH GRAIN RAIL RATES IN THREE U.S. RATE TERRITORIES
Creators: name: Pesch, Michael J.
name: Larson, Donald W.
name: Pesch, Michael J.
name: Larson, Donald W.
Publisher: name: Unknown
Year: 1981
Subjects: Public Economics

description: Through regression analysis the variability of grain rail rates in three rail rate territories was found to be significantly explained by shipment size, traveling distance, and rail rate territory. Study results are discussed as they relate to the Staggers Rail Act of 1980 and alternative pricing policies.
HPC Infrastructures Workshop 2021
Creators: name: Svensson, Gert
name: Shoukourian, Hayk
name: Weinberg, Volker
name: Stoffers, Huub
name: Radosław Januszewski
name: Cestari, Mirko
name: Ezhilmathi Krishnasamy
name: Johansson, Andreas
name: Robin, François
name: Bartolome, Javier
name: Meideros, Rafael
name: Eyraud, Nicolas
Publisher: name: Zenodo
Year: 2021
Subjects: HPC Infrastructures Workshop
High-Performance Computing
Proceedings
EWHPC
EuroHPC Joint Undertaking

description: The annual series of European Workshops on HPC Infrastructures (EWHPC) aims to bring together specialists in High-Performance Computing (HPC) centre design and operation from around the world to discuss the latest trends in HPC infrastructure and supporting technologies for supercomputing centres. Due to the COVID-19 pandemic, the 11th EWHPC was held as an online event. It attracted more than 110 registrations from 53 different HPC sites and provided a general overview on the EuroHPC Joint Undertaking (JU) as well as updates on the following three EuroHPC JU petascale sites and their systems: MeluXina, LuxProvide, Luxembourg, VEGA, IZUM, Slovenia, and Karolina, IT4Innovations National Supercomputing Center, Czech Republic. The 11th EWHPC event was held on the 18th and 19th of May 2021 and was followed, as usual, by a PRACE session on HPC infrastructures. The session featured technical presentations from PRACE sites and was held on the 20th of May 2021. This document summarises the presentations and discussions held during the online EWHPC event and the PRACE session on HPC infrastructures.
Distribution of Benefits from Participation in the Farmer-Owned Grain Reserve by Farm Size under Risk
Creators: name: Morton, Andrew
name: Langley, James
name: Heady, Earl O.
name: Morton, Andrew
name: Langley, James
name: Heady, Earl O.
Publisher: name: Unknown
Year: 1981
Subjects: Risk and Uncertainty

description: A present value certainty equivalence approach is used to assess the potential distributional aspects of participating in the farmer-owned reserve across farm size under risk. Even if the risk discount increases with farm size, other aspects favor participation of large producers enough to outweigh the risk factor.
Anoreina biannulata
Creators: name: Monné, Miguel A.
Publisher: name: Zenodo
Year: 2005
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Cerambycidae
Anoreina
Anoreina biannulata

description: 1. Anoreina biannulata (Bates, 1866)
Type locality — Brazil, Amazonas: São Paulo de Olivença. (MNHN). Distribution — Brazil (Amazonas).
 Oreodera (Anoreina) biannulata Bates, 1866: 433.
 Anoreina biannulata; Monné & Giesbert, 1995: 239 (cat.).
description: Published as part of Monné, Miguel A., 2005, Catalogue of the Cerambycidae (Coleoptera) of the Neotropical Region. Part II. Subfamily Lamiinae, pp. 1-760 in Zootaxa 1023 (1) on pages 1-760, DOI: 10.11646/zootaxa.946.1.1, http://zenodo.org/record/5049553
Cepheid Metallicity in the Leavitt Law (C- MetaLL) survey: VI: Radial abundance gradients of 29 chemical species in the Milky Way Disk
Creators: name: Trentin, E.
name: Catanzaro, G.
name: Ripepi, V.
name: Alonso-Santiago, J.
name: Molinaro, R.
name: Storm, J.
name: De Somma, G.
name: Marconi, M.
name: Bhardwaj, A.
name: Gatto, M.
name: Musella, I.
name: Testa, V.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Classical Cepheids (DCEPs) are crucial for calibrating the extragalactic distance ladder, ultimately enabling the determination of the Hubble constant through the PL and PW relations they exhibit. Hence it's vital to understand how the PL and PW relations depend on metallicity. This is the purpose of the C-MetaLL survey within which this work is situated. DCEPs are also very important tracers of the young populations placed along the Galactic disc. We aim to enlarge the sample of DCEPs with accurate abundances from high-resolution spectroscopy. Our goal is to extend the range of measured metallicities towards the metal-poor regime to better cover the parameter space. We observed objects in a wide range of Galactocentric radii, allowing us to study in detail the abundance gradients present in the Galactic disc. We present the results of the analysis of 331 spectra obtained for 180 individual DCEPs with a variety of high-resolution spectrographs. We derived accurate atmospheric parameters, radial velocities, and abundances for up to 29 different species. The iron abundances range between 0.5 and -1 dex with a rather homogeneous distribution in metallicity. The sample presented in this paper was complemented with that already published in the context of the C-MetaLL survey, resulting in a total of 292 pulsators whose spectra have been analysed in a homogeneous way. These data were used to study the abundance gradients of the Galactic disc in a range of Galactocentric radii spanning the range 5-20 kpc. For most of the elements we found a clear negative gradient, with a slope of -0.071\pm0.003 dex kpc^-1 for [Fe/H] case. Through a qualitative fit with the Galactic spiral arms we shown how our farthest targets (R_GC>10 kpc) trace both the Outer and OSC arms. The homogeneity of the sample will be of pivotal importance for the study of the metallicity dependance of the DCEP PL relations.
description: 16 pages, 16 figures, 4 tables, accepted to be published in A&A, version post layout and language editor corrections
Design of Internal Dual Band Printed Monopole Antenna Based on Peano-type Fractal Geometry for WLAN USB Dongle
Creators: name: Ali, Jawad K.
Publisher: name: figshare
Year: 2020
Subjects: subject: 90699 Electrical and Electronic Engineering not elsewhere classified
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper introduces the design of a new dual-band internal printed monopole antenna structure as a candidate for WLAN (wireless local area network) USB (universal serial bus) dongle applications. The proposed antenna structure is based on the second iteration of Peano- type space-filling geometry. The antenna has been printed on a substrate with relative permittivity of 2.33 and thickness of 0.8 mm, and fed with 50­ microstrip line. The resulting antenna has been found to possess a compact size of 15mm £ 5:6 mm, which is suitable for this application. Furthermore, the proposed antenna offers a dual resonant behavior with frequency ratio of about 2.41; resulting in bandwidths, for return loss · ¡10 dB, covering the two WLAN band standards. Modeling and performance evaluation of the proposed antenna have been carried out using the CST Microwave Studio. Simulation results of return loss, radiation patterns, and gain verify that the presented antenna represents a good solution for dual-band WLAN USB dongle applications.
Ruin probability for the bi-seasonal discrete time risk model with dependent claims
Creators: name: Navickienė, Olga
name: Sprindys, Jonas
name: Šiaulys, Jonas
Publisher: name: arXiv
Year: 2020
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: The discrete time risk model with two seasons and dependent claims is considered. An algorithm is created for computing the values of the ultimate ruin probability. Theoretical results are illustrated with numerical examples.
description: Published at https://doi.org/10.15559/18-VMSTA118 in the Modern Stochastics: Theory and Applications (https://vmsta.org/) by VTeX (http://www.vtex.lt/)
An Ultra-wideband Printed Monopole Antenna with a Fractal Based Reduced Ground Plane
Creators: name: Ali, Jawad K.
Publisher: name: figshare
Year: 2020
Subjects: subject: 90699 Electrical and Electronic Engineering not elsewhere classified
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Recently, the ultra-wideband (UWB) systems have attracted much attention because of its advantages including high speed data, small size, low cost, and low complexity. Consequently, the UWB antenna has received an increased attention due to its impedance band- width, simple structure and omni-directional radiation pattern. In this paper, the effects of the ground plane of a printed monopole UWB antenna, fed with a 50­ microstrip line, have been investigated. A Koch fractal based ground plane structure has been proposed as a means to enhance the UWB antenna performance. Different ground plane structures and feeding methods have been applied to a notched band monopole antenna structure that is a nearly square with embedded E-shaped slot. The proposed antenna has been supposed to be etched using a substrate with relative permittivity of 4.6 and thickness of 1.6 mm. Modeling and performance evaluation of the presented antenna designs have been carried out using a method of moments based EM simulator, IE3D. Simulation results have shown that the antenna with Koch based ground plane and asymmetrical feed offers larger fractional bandwidth of about 124%. By this increment in the antenna bandwidth, it is expected that by suitable dimension scaling of the enhanced bandwidth UWB antenna, many communication services below 3.1 GHz could be integrated with the UWB systems.
Gas accretion and Ram Pressure Stripping of Haloes in Void Walls
Creators: name: Thompson, B. B.
name: Smith, R.
name: Kraljic, K.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We conduct hydrodynamical cosmological zoom simulations of fourteen voids to study the ability of haloes to accrete gas at different locations throughout the voids at z = 0. Measuring the relative velocity of haloes with respect to their ambient gas, we find that a tenth of the haloes are expected to be unable to accrete external gas due to its fast flow passed them (so called 'fast flow haloes'). These are typically located near void walls. We determine that these haloes have recently crossed the void wall and are still moving away from it. their motion counter to that of ambient gas falling towards the void wall results in fast flows that make external gas accretion very challenging, and often cause partial gas loss via the resultant ram pressures. Using an analytical approach, we model the impact of such ram pressures on the gas inside haloes of different masses. A halo's external gas accretion is typically cut off, with partial stripping of halo gas. For masses below a few times 10$^{9}$ M$_{\odot}$, their halo gas is heavily truncated but not completely stripped. We identify numerous examples of haloes with a clear jelly-fish like gas morphology, indicating their surrounding gas is being swept away, cutting them off from further external accretion. These results highlight how, even in the relatively low densities of void walls, a fraction of galaxies can interact with large-scale flows in a manner that has consequences for their gas content and ability to accrete gas.
description: 13 pages, 8 figures
Regulariztion dependence of S=0 and S=-1 meson-baryon system in the chiral unitary model
Creators: name: Nam, S. I.
name: KIm, H. -Ch.
name: Hyodo, T.
name: Jido, D.
name: Hosaka, A.
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We investigate the dependence of s-wave meson-baryon scattering amplitudes on different regularizations within the framework of the chiral unitary model. We employ two different regularization schemes, i.e. dimensional and form-factor regulariaztions to tame the divergences in the model. We also study the analytic structures of T-matrices, using those regularization schemes. We find that while the form-factor regularizaion produces almost the same results as the dimensional regularization did, the on-shell approximation is to some extent limited in the case of the form-factor regularization. Having chosen parameters properly, we show that the regularization dependences can be minimized.
description: 18 pages, 15 figures
The boring history of Gaia BH3 from isolated binary evolution
Creators: name: Iorio, Giuliano
name: Torniamenti, Stefano
name: Mapelli, Michela
name: Dall'Amico, Marco
name: Trani, Alessandro A.
name: Rastello, Sara
name: Sgalletta, Cecilia
name: Rinaldi, Stefano
name: Costa, Guglielmo
name: Dhal-Lahtinen, Bera A.
name: Escobar, Gaston J.
name: Korb, Erika
name: Vaccaro, M. Paola
name: Lacchin, Elena
name: Mestichelli, Benedetta
name: di Carlo, Ugo Niccolò
name: Spera, Mario
name: Sedda, Manuel Arca
Publisher: name: arXiv
Year: 2024
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Gaia BH3 is the first observed dormant black hole (BH) with a mass of $\approx{30}$ M$_\odot$ and represents the first confirmation that such massive BHs are associated with metal-poor stars. Here, we explore the isolated binary formation channel for Gaia BH3 focusing on the old and metal-poor stellar population of the Milky Way halo. We use the MIST stellar models and our open-source population synthesis code SEVN to evolve $5.6 \times 10^8$ binaries exploring 20 sets of parameters. We find that systems like Gaia BH3 form preferentially from binaries initially composed of a massive star ($40-60$ M$_\odot$) and a low mass companion ($<1$ M$_\odot$) in a wide ($P>10^3$ days) and eccentric orbit ($e>0.6$). Such progenitor binary stars do not undergo any Roche-lobe overflow episode during their entire evolution, so that the final orbital properties of the BH-star system are determined at the core collapse of the primary star. Low natal kicks ($\lesssim$ 10~km/s) significantly favour the formation of Gaia BH3-like systems, but high velocity kicks up to $\approx 220$ km/s are also allowed. We estimate the formation efficiency for Gaia BH3-like systems in old ($t>10$ Gyr) and metal-poor ($Z<0.01$) populations to be $\sim 4 \times 10^{-8}$ M$_\odot^{-1}$ (for our fiducial model), representing $\sim 3\%$ of the whole simulated BH-star population. We expect up to $\approx 4000$ BH-star systems in the Galactic halo formed through isolated evolution, of which $\approx 100$ are compatible with Gaia BH3-like. Given the density profile of the Galactic halo we do not expect more than one at the observed distance of Gaia BH3. Our models show that, even if it was born inside a stellar cluster, Gaia BH3 is compatible with a primordial binary star that escaped from its parent cluster without experiencing significant dynamical interactions.
description: Accepted for publication in A&A. The produced datasets are publicly available in Zenodo. I Initiail conditions and run scripts: https://zenodo.org/records/11617742; IIA simulation outcomes: https://zenodo.org/records/11992265; IIB simulation outcomes, different metallicities: https://zenodo.org/records/12188369; IIC simulation outcomes, fiducial 1E8, https://zenodo.org/records/12189734
Measurement of enhanced spin-orbit coupling strength for donor-bound electron spins in silicon
Creators: name: Krishnan, Radha
name: Gan, Beng Yee
name: Hsueh, Yu-Ling
name: Huq, A. M. Saffat-Ee
name: Kenny, Jonathan
name: Rahman, Rajib
name: Koh, Teck Seng
name: Simmons, Michelle Y.
name: Weber, Bent
Publisher: name: arXiv
Year: 2024
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: While traditionally considered a deleterious effect in quantum dot spin qubits, the spin-orbit interaction is recently being revisited as it allows for rapid coherent control by on-chip AC electric fields. For electrons in bulk silicon, SOC is intrinsically weak, however, it can be enhanced at surfaces and interfaces, or through atomic placement. Here we show that the strength of the spin-orbit coupling can be locally enhanced by more than two orders of magnitude in the manybody wave functions of multi-donor quantum dots compared to a single donor, reaching strengths so far only reported for holes or two-donor system with certain symmetry. Our findings may provide a pathway towards all-electrical control of donor-bound spins in silicon using electric dipole spin resonance (EDSR).
title: 01_1220
Creators: name: Wesley Baldwin, John
name: Baldwin, John W.
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2018
Subjects: subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris

description: L'ensemble de ces notes ont été crée par John Baldwin lors d'une de ses premières périodes de résidence à Paris. Ces documents comprennent tous les magistri qu’il avait pu rencontrer dans ses sources. Aux XIIème et XIIIème siècles, les universités n'existant pas encore, le titre de magister s'il évoque certainement une compétence n'est pas rattaché de façon systématique au passage par les écoles. De surcroît, les magistris sont le plus souvent désignés par leur seul prénom. La lecture de ces données est donc difficile et suppose un long travail pour tenter d'identifier un individu auquel on pourrait rattacher plusieurs mentions. John Baldwin avait donc renoncé à utiliser ces données pour donner un prolongement à sa magnifique étude sur les gradués d'université et leur emploi par les Capétiens et les Plantagenêts. Néanmoins, il a conservé ces données et elles sont potentiellement très utile dans le cadre de Studium, comme le sont toutes les mentions dans les volumes des Fasti Ecclesiae Gallicanae de chanoines portant ce titre de magister sans autres précisions. L'ampleur des dépouillements rend ces données très utiles et nous devons une grande reconnaissance à John Baldwin pour avoir pris la peine de faire photocopier ses fiches et de nous les avoir transmises amicalement.
Les données ainsi que les images des fiches sont accessibles sur le site Internet à l'adresse suivante : http://studium-baldwin.lamop.fr/.
Les transcriptions des fiches ont été effectuées par des étudiants de Paris 1 Panthéon - Sorbonne mais elles n'ont pas été corrigées par la suite.
description: Relation: https://lamop.hypotheses.org/
Origin of chaos in the spherical nuclear shell model: role of symmetries
Creators: name: Papenbrock, T.
name: Weidenmueller, H. A.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: To elucidate the mechanism by which chaos is generated in the shell model, we compare three random-matrix ensembles: the Gaussian orthogonal ensemble, French's two-body embedded ensemble, and the two-body random ensemble (TBRE) of the shell model. Of these, the last two take account of the two-body nature of the residual interaction, and only the last, of the existence of conserved quantum numbers like spin, isospin, and parity. While the number of independent random variables decreases drastically as we follow this sequence, the complexity of the (fixed) matrices which support the random variables, increases even more. In that sense we can say that in the TBRE, chaos is largely due to the existence of (an incomplete set of) symmetries.
description: 21 pages, 3 ps-figures. Revised version to appear in Nucl. Phys. A. New text and figures added
Magnetic field evolution in cosmic filaments with LOFAR data
Creators: name: Carretti, E.
name: O'Sullivan, S.
name: Vacca, V.
name: Vazza, F.
name: Gheller, C.
name: Vernstrom, T.
name: Bonafede, A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Measuring the magnetic field in cosmic filaments reveals how the Universe is magnetised and the process that magnetised it. Using the Rotation Measures (RM) at 144-MHz from the LoTSS DR2 data, we analyse the rms of the RM extragalactic component as a function of redshift to investigate the evolution with redshift of the magnetic field in filaments. From previous results, we find that the extragalactic term of the RM rms at 144-MHz is dominated by the contribution from filaments (more than 90 percent). Including an error term to account for the minor contribution local to the sources, we fit the data with a model of the physical filament magnetic field, evolving as $B_f = B_{f,0}\,(1+z)^α$ and with a density drawn from cosmological simulations of five magnetogenesis scenarios. We find that the best-fit slope is in the range $α= [-0.2, 0.1]$ with uncertainty of $σ_α= 0.4$--0.5, which is consistent with no evolution. The comoving field decreases with redshift with a slope of $γ= α- 2 = [-2.2, -1.9]$. The mean field strength at $z=0$ is in the range $B_{f,0}=39$--84~nG. For a typical filament gas overdensity of $δ_g=10$ the filament field strength at $z=0$ is in the range $B_{f,0}^{10}=8$--26~nG. A primordial stochastic magnetic field model with initial comoving field of $B_{\rm Mpc} = 0.04$--0.11~nG is favoured. The primordial uniform field model is rejected.
description: accepted for publication in MNRAS
PIR Codes with Short Block Length
Creators: name: Kurz, Sascha
name: Yaakobi, Eitan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Information Theory (cs.IT)
subject: Combinatorics (math.CO)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics
subject: E.4
subject: 68P30

description: In this work private information retrieval (PIR) codes are studied. In a $k$-PIR code, $s$ information bits are encoded in such a way that every information bit has $k$ mutually disjoint recovery sets. The main problem under this paradigm is to minimize the number of encoded bits given the values of $s$ and $k$, where this value is denoted by $P(s,k)$. The main focus of this work is to analyze $P(s,k)$ for a large range of parameters of $s$ and $k$. In particular, we improve upon several of the existing results on this value.
description: 10 pages, 1 table
TATONNEMENT MODELLING: A VARIATION TO LINEAR PROGRAMMING
Creators: name: English, Burton C.
name: Short, Cameron
name: Heady, Earl O.
name: English, Burton C.
name: Short, Cameron
name: Heady, Earl O.
Publisher: name: Unknown
Year: 1981
Subjects: Research Methods/ Statistical Methods

description: An iterative solution incorporating Demand equations and on national interregional Linear Programming model is explored. Conditions for stability are found and comparison of an iterative solution process and a fixed demand solution is made. The iterative process used in the analysis allows the model to adjust demand levels when the supply curve shifts as a result of increased production costs.
Anoreina nana
Creators: name: Monné, Miguel A.
Publisher: name: Zenodo
Year: 2005
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Cerambycidae
Anoreina
Anoreina nana

description: 2. Anoreina nana (Bates, 1861)
Type locality — Brazil, Pará: Santarém. (MNHN). Distribution — Brazil (Pará).
 Oreodera (Anoreina) nana Bates, 1861: 149.
 Anoreina nana; Monné & Giesbert, 1995: 240 (cat.).
  Ateralphus Restello, Iannuzzi & Marinoni, 2001
 Ateralphus Restello, Iannuzzi & Marinoni, 2001: 300.
 Type­species — Alphus subsellatus White, 1855 (original designation).
description: Published as part of Monné, Miguel A., 2005, Catalogue of the Cerambycidae (Coleoptera) of the Neotropical Region. Part II. Subfamily Lamiinae, pp. 1-760 in Zootaxa 1023 (1) on pages 1-760, DOI: 10.11646/zootaxa.946.1.1, http://zenodo.org/record/5049553
DEMAND, SUPPLY, AND PRICE OF HARDWOOD LUMBER
Creators: name: Luppold, William
name: Havlicek, Joseph
name: Luppold, William
name: Havlicek, Joseph
Publisher: name: Unknown
Year: 1981
Subjects: Demand and Price Analysis

description: A cobweb model with causal flow originating from the demand relationship is used to analyze the effects of exogenous variables on quantity and price of hardwood lumber. Wage rate, interest rates, stumpage price, lumber exports, and price of lumber demanders' output were the major factors influencing quantity and price.
A "Starless" Core that Isn't: Detection of a Source in the L1014 Dense Core with the Spitzer Space Telescope
Creators: name: Young, C. H.
name: Joergensen, J. K.
name: Shirley, Y. L.
name: Kauffmann, J.
name: Huard, T.
name: Lai, S. -P.
name: Lee, C. W.
name: Crapsi, A.
name: Bourke, T. L.
name: Dullemond, C. P.
name: Brooke, T. Y.
name: Porras, A.
name: Spiesman, W.
name: Allen, L. E.
name: Blake, G. A.
name: Evans, N. J.
name: Harvey, P. M.
name: Koerner, D. W.
name: Mundy, L. G.
name: Myers, P. C.
name: Padgett, D. L.
name: Sargent, A. I.
name: Stapelfeldt, K. R.
name: van Dishoeck, E. F.
name: Bertoldi, F.
name: Chapman, N.
name: Cieza, L.
name: DeVries, C. H.
name: Ridge, N. A.
name: Wahhaj, Z.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present observations of L1014, a dense core in the Cygnus region previously thought to be starless, but data from the Spitzer Space Telescope shows the presence of an embedded source. We propose a model for this source that includes a cold core, heated by the interstellar radiation field, and a low-luminosity internal source. The low luminosity of the internal source suggests a substellar object. If L1014 is representative, other "starless" cores may turn out to harbor central sources.
description: 7 pages, To appear in the ApJS Spitzer Special Edition
Novae in M51: a New, Much Higher Rate from Multi-epoch HST Data
Creators: name: Mandel, Shifra
name: Shara, Michael M.
name: Zurek, David
name: Conroy, Charlie
name: van Dokkum, Pieter
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Accurate determination of the rates of nova eruptions in different kinds of galaxies give us strong constraints on those galaxies' underlying white dwarf and binary populations, and those stars' spatial distributions. Until 2016, limitations inherent in ground-based surveys of external galaxies - and dust extinction in the Milky Way - significantly hampered the determination of those rates and how much they differ between different types of galaxies. Infrared Galactic surveys and dense cadence Hubble Space Telescope (HST)-based surveys are overcoming these limitations, leading to sharply increased nova-in-galaxy rates relative to those previously claimed. Here we present 14 nova candidates that were serendipitously observed during a year-long HST survey of the massive spiral galaxy M51 (the "Whirlpool Galaxy"). We use simulations based on observed nova light curves to model the incompleteness of the HST survey in unprecedented detail, determining a nova detection efficiency $ε= 20.3$ percent. The survey's M51 area coverage, combined with $ε$, indicates a conservative M51 nova rate of $172^{+46}_{-37}$ novae yr$^{-1}$, corresponding to a luminosity-specific nova rate (LSNR) of $\sim10.4^{+2.8}_{-2.2}$ novae yr$^{-1}$/$10^{10} L_{\odot,K}$. Both these rates are approximately an order of magnitude higher than those estimated by ground-based studies, contradicting claims of universal low nova rates in all types of galaxies determined by low cadence, ground-based surveys. They demonstrate that, contrary to theoretical models, the HST-determined LSNR in a giant elliptical galaxy (M87) and a giant spiral galaxy (M51) likely do not differ by an order of magnitude or more, and may in fact be quite similar.