cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Nonlinear dynamic response of FG-GPLRC beams induced by two successive moving loads
Creators: name: Wattanasakulpong, Nuttawit
name: Karamanli, Armagan
name: Vo, Thuc
Publisher: name: La Trobe
Year: 2023
Subjects: classificationCode: 4901
subject: Applied mathematics
classificationCode: 4005
subject: Civil engineering
subject: FOS: Civil engineering
classificationCode: 4017
subject: Mechanical engineering
subject: FOS: Mechanical engineering

description: In this study, the nonlinear dynamic analysis of functionally graded graphene nanoplatelet reinforced composite (FG-GPLRC) beams is examined. The material properties can be estimated by using the modified Halpin-Tsai model and rule of mixture. Based on the third-order shear deformation theory and the von Kármán assumption, the equations of motion is derived and solved by using Jacobi-Ritz method incorporating with iteration procedure. Several effects such as number of layers, weight fraction of graphene nanoplatelets, material distributions, beam geometry, velocity of moving loads, distance between the loads are considered. For nonlinear forced vibration, the results indicate a considerable dissimilarity in the nonlinear dynamic deflection of the beams under moving loads when compared to linear analysis. The incorporation of additional GPLs into the beams yields a significant improvement in the strength of the beam, resulting in lower deflection. The new findings on nonlinear response of the beams excited by one and two moving loads are presented.
The Plasma Structure of the Southwestern Region of the Cygnus Loop with the XMM-Newton Observatory
Creators: name: Uchida, Hiroyuki
name: Tsunemi, Hiroshi
name: Katsuda, Satoru
name: Kimura, Masashi
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We observed the southwestern region of the Cygnus Loop in two pointings with \textit{XMM-Newton}. The region observed is called the "blow-out" region that is extended further in the south. The origin of the "blow-out" is not well understood while it is suggested that there is another supernova remnant here in radio observation. To investigate the detail structure of this region in X-ray, we divided our fields of view into 33 box regions. The spectra are well fitted by a two-component nonequilibrium ionization model. The emission measure distributions of heavy elements decrease from the inner region to the outer region of the Loop. Then, we also divided our fields of view into 26 annular sectors to examine the radial plasma structure. Judging from metal abundances obtained, it is consistent with that the X-ray emission is the Cygnus Loop origin and we concluded that high-$kT_{e}$ component ($\sim$0.4 keV) originates from the ejecta while low-$kT_{e}$ component ($\sim$0.2 keV) is derived from the swept-up interstellar medium. The flux of low-$kT_{e}$ component is much less than that of high-$kT_{e}$ component, suggesting the ISM component is very thin. Also, the relative abundances in the ejecta component shows similar values to those obtained from previous observations of the Cygnus Loop. We find no evidence in X-ray that the nature of the "blow-out" region originated from the extra supernova remnant. From the ejecta component, we calculated the masses for various metals and estimated the origin of the Cygnus Loop as the core-collapse explosion rather than the Type Ia supernova.
description: 10 pages, 28 figures, accepted for publication in the Astrophysical Journal
Zatypota albicoxa
Creators: name: Riedel
name: Pénigot
name: Schwarz
name: Diller
name: Johansson
name: Japoshvili, G.
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Zatypota
Zatypota albicoxa

description: Zatypota albicoxa (W ALKER, 1874)
M a t e r i a l e x a m i n e d: Trap7: 1♀ 20.v.-1.vi.
D i s t r i b u t i o n: Transpalaearctic and Oriental, new record for Georgia and the Caucasus region.
description: Published as part of Riedel, Pénigot, Schwarz, Diller, Johansson & Japoshvili, G., 2023, Darwin wasps (Hymenoptera, Ichneumonidae) of the Kintrishi National Park, Sakartvelo (Georgia), with descriptions of six new species, pp. 61-153 in Linzer biologische Beiträge 55 (1) on page 128, DOI: 10.5281/zenodo.10415120
Paramagnetic adsorbates on graphene: a charge transfer analysis
Creators: name: Leenaerts, O.
name: Partoens, B.
name: Peeters, F. M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We introduce a modified version of the Hirshfeld charge analysis method and demonstrate its accurateness by calculating the charge transfer between the paramagnetic molecule NO2 and graphene. The charge transfer between paramagnetic molecules and a graphene layer as calculated with ab initio methods can crucially depend on the size of the supercell used in the calculation. This has important consequences for adsorption studies involving paramagnetic molecules such as NO2 physisorbed on graphene or on carbon nanotubes.
description: 4 pages, 4 figures, submitted to Applied Physics Letters
Modification of the hybridization gap by twisted stacking of quintuple layers in a three dimensional topological insulator thin film
Creators: name: Zhou, Changyuan
name: Song, Dezhi
name: Jiang, Yeping
name: Zhang, Jun
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Twisting the stacking of layered materials leads to rich new physics. A three dimensional (3D) topological insulator film host two dimensional gapless Dirac electrons on top and bottom surfaces, which, when the film is below some critical thickness, will hybridize and open a gap in the surface state structure. The hybridization gap can be tuned by various parameters such as film thickness, inversion symmetry, etc. according to the literature. The 3D strong topological insulator Bi(Sb)Se(Te) family have layered structures composed of quintuple layers (QL) stacked together by van der Waals interaction. Here we successfully grow twistedly-stacked Sb2Te3 QLs and investigate the effect of twist angels on the hybridization gaps below the thickness limit. We find that the hybridization gap can be tuned for films of three QLs, which might lead to quantum spin Hall states. Signatures of gap-closing are found in 3-QL films. The successful in-situ application of this approach opening a new route to search for exotic physics in topological insulators.
description: 12 pages, 4 figures
Zatypota percontatoria
Creators: name: Riedel
name: Pénigot
name: Schwarz
name: Diller
name: Johansson
name: Japoshvili, G.
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Zatypota
Zatypota percontatoria

description: Zatypota percontatoria (MÜLLER, 1776)
M a t e r i a l e x a m i n e d: Trap 2: 1♀ 1-15.vi.; trap 8: 1♀ 15-29.vi.
D i s t r i b u t i o n: Holarctic, known from Georgia (KASPARYAN 1976, KASPARYAN & KHALAIM 2007, RIEDEL & JAPOSHVILI 2021).
description: Published as part of Riedel, Pénigot, Schwarz, Diller, Johansson & Japoshvili, G., 2023, Darwin wasps (Hymenoptera, Ichneumonidae) of the Kintrishi National Park, Sakartvelo (Georgia), with descriptions of six new species, pp. 61-153 in Linzer biologische Beiträge 55 (1) on page 128, DOI: 10.5281/zenodo.10415120
Effect of magnetic field on the spin resonance in FeTe(0.5)Se(0.5) as seen via inelastic neutron scattering
Creators: name: Wen, Jinsheng
name: Xu, Guangyong
name: Xu, Zhijun
name: Lin, Zhi Wei
name: Li, Qiang
name: Chen, Ying
name: Chi, Songxue
name: Gu, Genda
name: Tranquada, J. M.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Inelastic neutron scattering and susceptibility measurements have been performed on the optimally-doped Fe-based superconductor FeTe(0.5)Se(0.5), which has a critical temperature, Tc of 14 K. The magnetic scattering at the stripe antiferromagnetic wave-vector Q = (0.5,0.5) exhibits a "resonance" at ~ 6 meV, where the scattering intensity increases abruptly when cooled below Tc. In a 7-T magnetic field parallel to the a-b plane, Tc is slightly reduced to ~ 12 K, based on susceptibility measurements. The resonance in the neutron scattering measurements is also affected by the field. The resonance intensity under field cooling starts to rise at a lower temperature ~ 12 K, and the low temperature intensity is also reduced from the zero-field value. Our results provide clear evidence for the intimate relationship between superconductivity and the resonance measured in magnetic excitations of Fe-based superconductors.
description: 4 pages, 3 figures
Apechthis capulifera
Creators: name: Riedel
name: Pénigot
name: Schwarz
name: Diller
name: Johansson
name: Japoshvili, G.
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Apechthis
Apechthis capulifera

description: Apechthis capulifera (KRIECHBAUMER, 1887)
M a t e r i a l e x a m i n e d: Trap7: 1♀ 1-25.vi.
D i s t r i b u t i o n: Transpalaearctic and Oriental, known from Azerbaijan (MAHARRAMOVA 2010), new record for Georgia.
description: Published as part of Riedel, Pénigot, Schwarz, Diller, Johansson & Japoshvili, G., 2023, Darwin wasps (Hymenoptera, Ichneumonidae) of the Kintrishi National Park, Sakartvelo (Georgia), with descriptions of six new species, pp. 61-153 in Linzer biologische Beiträge 55 (1) on page 129, DOI: 10.5281/zenodo.10415120
Velocity-adaptive Access Scheme for MEC-assisted Platooning Networks: Access Fairness Via Data Freshness
Creators: name: Wu, Qiong
name: Wan, Ziyang
name: Fan, Qiang
name: Fan, Pingyi
name: Wang, Jiangzhou
Publisher: name: arXiv
Year: 2021
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Platooning strategy is an important part of autonomous driving technology. Due to the limited resource of autonomous vehicles in platoons, mobile edge computing (MEC) is usually used to assist vehicles in platoons to obtain useful information, increasing its safety. Specifically, vehicles usually adopt the IEEE 802.11 distributed coordination function (DCF) mechanism to transmit large amount of data to the base station (BS) through vehicle-to-infrastructure (V2I) communications, where the useful information can be extracted by the edge server connected to the BS and then sent back to the vehicles to make correct decisions in time. However, vehicles may be moving on different lanes with different velocities, which incurs the unfair access due to the characteristics of platoons, i.e., vehicles on different lanes transmit different amount of data to the BS when they pass through the coverage of the BS, which also results in the different amount of useful information received by various vehicles. Moreover, age of information (AoI) is an important performance metric to measure the freshness of the data. Large average age of data implies not receiving the useful information in time. It is necessary to design an access scheme to jointly optimize the fairness and data freshness. In this paper, we formulate a joint optimization problem in the MEC-assisted V2I networks and present a multi-objective optimization scheme to solve the problem through adjusting the minimum contention window under the IEEE 802.11 DCF mode according to the velocities of vehicles. The effectiveness of the scheme has been demonstrated by simulation.
description: This paper has been accepted by IEEE Internet of Things Journal
Apechthis compunctor
Creators: name: Riedel
name: Pénigot
name: Schwarz
name: Diller
name: Johansson
name: Japoshvili, G.
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Apechthis
Apechthis compunctor

description: Apechthis compunctor (LINNAEUS, 1758)
M a t e r i a l e x a m i n e d: Trap2: 1♀ 20.v.-1.vi.; trap 4: 1♁ 13-27.vii.; trap 7: 1♁ 23.iv.-5.v.
D i s t r i b u t i o n: Transpalaearctic, known from Georgia (DJANELIDZE 1966, KASPARYAN 1973a).
description: Published as part of Riedel, Pénigot, Schwarz, Diller, Johansson & Japoshvili, G., 2023, Darwin wasps (Hymenoptera, Ichneumonidae) of the Kintrishi National Park, Sakartvelo (Georgia), with descriptions of six new species, pp. 61-153 in Linzer biologische Beiträge 55 (1) on page 129, DOI: 10.5281/zenodo.10415120
The development and testing of a methodology for identifying reasons used to recommend curricula
Creators: name: Gleadow, Norman E.
Publisher: name: University of British Columbia
Year: 2010

description: This study describes the development of an instrument which would permit educators to carry out more meaningful education goal selection surveys, or "needs assessments", than is presently done. The instrument, called the Reasons Selection Questionnaire (RSQ), enables educators to identify the reasons which people used to judge the worth of educational goals, and provides information needed to select defensible goals. The-study was undertaken in the educational setting of a unique post-primary schooling program, offered in Honiara, the capital of the Solomon Islands. The Reasons Selection Questionnaire was field tested using a stratified random sample of people in the community of Honiara, and all the students at the Solomon Island Teachers' College. The data obtained were interpreted to show that the RSQ successfully met appropriate validity criteria, was generally easily understood and completed by the people in the samples, and provided results which had high test-retest stability. Different analysis strategies, appropriate for the RSQ data, are explored in this study. In addition, suggestions are made for potential applications of, and for further research on the RSQ technique.
Probability for chance coincidence of a gamma-ray burst with a galaxy on the sky
Creators: name: Campisi, Maria Angela
name: Li, Li-Xin
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The nearby long GRB 060614 was not accompanied by a supernova, challenging the collapsar model for long-duration GRBs and the traditional classification scheme for GRBs. However, Cobb et al. have argued that the association of GRB 060614 and its host galaxy could be chance coincidence. In this work we calculate the probability for a GRB to be randomly coincident with a galaxy on the sky, using a galaxy luminosity function obtained from current galaxy surveys. We find that, with a magnitude limit that current telescopes can reach and an evolving galaxy luminosity function obtained from VVDS, the probability for chance coincidence of a GRB with a galaxy of redshift <1.5 is about several percent. These results agree with previous estimates based on observed galaxies. For the case of GRB 060614, the probability for it to be coincident with a z<0.125 galaxy by angular separation <0.5" is ~0.02%, indicating that the association of GRB 060614 and its host galaxy is secure. If the telescope magnitude limit is significantly improved in future, the probability for GRB-galaxy association will be considerably large, making it very problematic to identify a GRB host based only on the superposition of a GRB and a galaxy on the sky.
description: 8 pages, 5 figures. Accepted by MNRAS
Apechthis quadridentata
Creators: name: Riedel
name: Pénigot
name: Schwarz
name: Diller
name: Johansson
name: Japoshvili, G.
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Apechthis
Apechthis quadridentata

description: Apechthis quadridentata (THOMSON, 1877)
M a t e r i a l e x a m i n e d: Trap 2: 1♀ 5-20.v.; trap 4: 1♁ 20.iv.-5.v., 1♁ 5-20.v., 1♀ 20.v.- 1.vi., 1♀ 1♁ 1-15.vi., 1♀ 5-19.x.; trap 7: 2♀♀ 5-20.v.; trap 8: 1♀ 15-29.vi.; trap 12: 1♁ 5-20.v., 1♁ 20.v.-1.vi.; trap 15: 1♁ 16-30.vi., 1♀ 1♁ 30.vi.-14.vii.
D i s t r i b u t i o n: Transpalaearctic and Oriental, known from Georgia (KASPARYAN 1973a, RIEDEL et al. 2018).
description: Published as part of Riedel, Pénigot, Schwarz, Diller, Johansson & Japoshvili, G., 2023, Darwin wasps (Hymenoptera, Ichneumonidae) of the Kintrishi National Park, Sakartvelo (Georgia), with descriptions of six new species, pp. 61-153 in Linzer biologische Beiträge 55 (1) on page 129, DOI: 10.5281/zenodo.10415120
title: A Study of Certain Convenience Foods With Reference to Purchaser, Cost, and Nutritive Value
Creators: name: Jensen, Naomi
Publisher: name: Utah State University
Year: 1964

description: The various activities associated with the provision of food for feeding of the family traditionally have been functions of the home . One of the major enterprises of the homemaker in past years was to plan , produce or purchase , preserve , and prepare food daily for the family. The role of the homemaker today has changed from one of producer to one of purchaser. Hence, at least weekly, the selection of food at the market place involves not only the best use of her time but wise expenditure of her food budget. The market is changing so rapidly that each year hundreds of new items are added to the grocery shelves. Lay-outs in stores, new packaging and prepackaging, added self-service, methods of check-out, increased size of stores, and the addition of non-food items have all had a tremendous effect upon the homemaker and her food budget. The increase in the availability of food with built-in conveniences presents the homemaker with decisions to be made that were unheard of one generation ago . Never before has the homemaker had such a great array of convenience, variety , nutrition, and glamour to choose from. Today's consumer has a three-way choice and she may use one or all of the three ways as she desires. She may serve home-prepared foods if her time permits , or supplement part of her home-prepared meals with a few mixes, or rely entirely on the convenience foods if her time is limited. The many new and wonderful forms of foods that are available have greatly lightened the physical labor of the homemaker, but they have increased the mental work. The homemaker is confronted with many decisions regarding food value, money value, and time management. Is it wiser to spend her money for these so-called convenient foods which are ready to serve or partially prepared so that more of her time is freed for other family duties? Each individual home-maker has to answer this question for herself and her family. Studies on differences in cost and nutritive value of certain convenience foods have not kept pace with the rapid increase in the number and kind of these convenience foods. A recent study giving average prices which was representative for the United States has been reported by Shays and Durham, 1963. Additional information on what is available in Utah grocery stores and on the effect of buiit-in convenience on cost is needed. The purpose of this study was to determine the purchaser, cost and nutritive value of specific convenience foods. The study includes a survey of two super markets and a neighborhood grocery store in the Logan, Utah, area to check on the convenience foods purchased.
Apechthis rufata
Creators: name: Riedel
name: Pénigot
name: Schwarz
name: Diller
name: Johansson
name: Japoshvili, G.
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Apechthis
Apechthis rufata

description: Apechthis rufata (GMELIN, 1790)
M a t e r i a l e x a m i n e d: Trap 2: 1♁ 20.iv.-5.v., 1♁ 5-20.v.; trap 4: 1♀ 1♁ 20.iv.-5.v.; trap 7: 4♁♁ 23.iv.-5.v., 1♁ 5-20.v., 1♀ 1-25.vi.; trap 12: 1♁ 20.v.-1.vi., 1♀ 15-29.vi.; trap 15: 1♀ 16- 30.vi., 1♁ 30.vi.-14.vii.
D i s t r i b u t i o n: Transpalaearctic and Oriental, known from Georgia (KASPARYAN 1973a, RIEDEL et al. 2018).
description: Published as part of Riedel, Pénigot, Schwarz, Diller, Johansson & Japoshvili, G., 2023, Darwin wasps (Hymenoptera, Ichneumonidae) of the Kintrishi National Park, Sakartvelo (Georgia), with descriptions of six new species, pp. 61-153 in Linzer biologische Beiträge 55 (1) on page 129, DOI: 10.5281/zenodo.10415120
Dualisation of the principal sigma model
Creators: name: Yilmaz, Nejat Tevfik
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The first-order formulation of the principal sigma model with a Lie group target space is performed. By using the dualisation of the algebra and the field content of the theory the field equations which are solely written in terms of the field strengths are realized through an extended symmetry algebra parametrization. The structure of this symmetry algebra is derived so that it generates the realization of the field equations in a Bianchi identity of the current derived from the extended parametrization.
description: 12 pages
Neutrino and Antineutrino Inclusive Charged-current Cross Section Measurements with the MINOS Near Detector
Creators: name: The MINOS Collaboration
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The energy dependence of the neutrino-iron and antineutrino-iron inclusive charged-current cross sections and their ratio have been measured using a high-statistics sample with the MINOS Near Detector exposed to the NuMI beam from the Main Injector at Fermilab. Neutrino and antineutrino fluxes were determined using a low hadronic energy subsample of charged-current events. We report measurements of neutrino-Fe (antineutrinoFe) cross section in the energy range 3-50 GeV (5-50 GeV) with precision of 2-8% (3-9%) and their ratio which is measured with precision 2-8%. The data set spans the region from low energy, where accurate measurements are sparse, up to the high-energy scaling region where the cross section is well understood.
description: accepted by PRD
Itoplectis alternans
Creators: name: Riedel
name: Pénigot
name: Schwarz
name: Diller
name: Johansson
name: Japoshvili, G.
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Itoplectis
Itoplectis alternans

description: Itoplectis alternans (GRAVENHORST, 1829)
M a t e r i a l e x a m i n e d: Trap 4: 1♀ 1-15.vi.; trap 15: 1♀ 30.vi.-14.vii., 1♀ 20.viii.-22.ix.
D i s t r i b u t i o n: Palaearctic and Oriental, known from Georgia (KASPARYAN 1973, RIEDEL et al. 2018, RIEDEL & JAPOSHVILI 2021).
description: Published as part of Riedel, Pénigot, Schwarz, Diller, Johansson & Japoshvili, G., 2023, Darwin wasps (Hymenoptera, Ichneumonidae) of the Kintrishi National Park, Sakartvelo (Georgia), with descriptions of six new species, pp. 61-153 in Linzer biologische Beiträge 55 (1) on page 129, DOI: 10.5281/zenodo.10415120
Canadian Gallup Poll # 508-1
Creators: name: Inc., The Canadian Gallup Poll
Publisher: name: Roper Center for Public Opinion Research
Year: 2022

description: Federal elections vote intent(1); past federal elections vote(1); current party preference(1); nuclear war(1); neutrality for Canada?(1); TV influence on family life(1); public opinion and national leadership(2); privatizing Petro-Canada(2); government as employer(3). Note: Demographics(17).
Numerical modeling of gravitational wave sources accelerated by OpenCL
Creators: name: Khanna, Gaurav
name: McKennon, Justin
Publisher: name: arXiv
Year: 2010
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: In this work, we make use of the OpenCL framework to accelerate an EMRI modeling application using the hardware accelerators -- Cell BE and Tesla CUDA GPU. We describe these compute technologies and our parallelization approach in detail, present our performance results, and then compare them with those from our previous implementations based on the native CUDA and Cell SDKs. The OpenCL framework allows us to execute identical source-code on both architectures and yet obtain strong performance gains that are comparable to what can be derived from the native SDKs.
description: 15 pages, 4 figures, published in (Elsevier) Computer Physics Communications
Itoplectis insignis PERKINS 1957
Creators: name: Riedel
name: Pénigot
name: Schwarz
name: Diller
name: Johansson
name: Japoshvili, G.
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Itoplectis
Itoplectis insignis

description: Itoplectis insignis PERKINS, 1957
M a t e r i a l e x a m i n e d: Trap7:1♁5-20.v.
D i s t r i b u t i o n: West Palaearctic, new record for Georgia and the Caucasus region.
description: Published as part of Riedel, Pénigot, Schwarz, Diller, Johansson & Japoshvili, G., 2023, Darwin wasps (Hymenoptera, Ichneumonidae) of the Kintrishi National Park, Sakartvelo (Georgia), with descriptions of six new species, pp. 61-153 in Linzer biologische Beiträge 55 (1) on page 129, DOI: 10.5281/zenodo.10415120
Nuclear isospin mixing and elastic parity-violating electron scattering
Creators: name: Moreno, O.
name: Sarriguren, P.
name: de Guerra, E. Moya
name: Udias, J. M.
name: Donnelly, T. W.
name: Sick, I.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The influence of nuclear isospin mixing on parity-violating elastic electron scattering is studied for the even-even, N=Z nuclei 12C, 24Mg, 28Si, and 32S. Their ground-state wave functions have been obtained using a self-consistent axially-symmetric mean-field approximation with density-dependent effective two-body Skyrme interactions. Some differences from previous shell-model calculations appear for the isovector Coulomb form factors which play a role in determining the parity-violating asymmetry. To gain an understanding of how these differences arise, the results have been expanded in a spherical harmonic oscillator basis. Results are obtained not only within the plane-wave Born approximation, but also using the distorted-wave Born approximation for comparison with potential future experimental studies of parity-violating electron scattering. To this end, for each nucleus the focus is placed on kinematic ranges where the signal (isospin-mixing effects on the parity-violating asymmetry) and the experimental figure-of-merit are maximized. Strangeness contributions to the asymmetry are also briefly discussed, since they and the isospin mixing contributions may play comparable roles for the nuclei being studied at the low momentum transfers of interest in the present work.
description: 25 pages, 9 figures
Detection of flare multi-periodic pulsations in mid-ultraviolet Balmer continuum, Ly-alpha, hard X-ray, and radio emissions simultaneously
Creators: name: Li, Dong
name: Ge, Mingyu
name: Dominique, Marie
name: Zhao, Haisheng
name: Li, Gang
name: Li, Xiaobo
name: Zhang, Shuangnan
name: Lu, Fangjun
name: Gan, Weiqun
name: Ning, Zongjun
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Quasi-periodic pulsations (QPPs), which usually appear as temporal pulsations of the total flux, are frequently detected in the light curves of solar/stellar flares. In this study, we present the investigation of non-stationary QPPs with multiple periods during the impulsive phase of a powerful flare on 2017 September 06, which were simultane- ously measured by the Large-Yield RAdiometer (LYRA) and the Hard X-ray Modula- tion Telescope (Insight-HXMT), as well as the ground-based BLENSW. The multiple periods, detected by applying a wavelet transform and Lomb-Scargle periodogram to the detrended light curves, are found to be about 20-55 s in the Ly-alpha and mid-ultraviolet Balmer continuum emissions during the flare impulsive phase. Similar QPPs with multi- ple periods are also found in the hard X-ray emission and low-frequency radio emission. Our observations suggest that the flare QPPs could be related to nonthermal electrons accelerated by the repeated energy release process, i.e., triggering of repetitive magnetic reconnection, while the multiple periods might be modulated by the sausage oscillation of hot plasma loops. For the multi-periodic pulsations, other generation mechanisms could not be completely ruled out.
description: Accepted for publication in The Astrophysical Journal
Nematic Fermi Fluids in Condensed Matter Physics
Creators: name: Fradkin, Eduardo
name: Kivelson, Steven A.
name: Lawler, Michael J.
name: Eisenstein, James P.
name: Mackenzie, Andrew P.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Correlated electron fluids can exhibit a startling array of complex phases, among which one of the more surprising is the electron nematic, a translationally invariant metallic phase with a spontaneously generated spatial anisotropy. Classical nematics generally occur in liquids of rod-like molecules; given that electrons are point-like, the initial theoretical motivation for contemplating electron nematics came from thinking of the electron fluid as a quantum melted electron crystal, rather than a strongly interacting descendent of a Fermi gas. That such phases exist in nature was established by dramatic transport experiments in ultra-clean quantum Hall systems in 1999 and in Sr3Ru2O7 in a strong magnetic field in 2007. In this paper, we briefly review the theoretical considerations governing nematic order, summarize the quantum Hall and Sr3Ru2O7 experiments that unambiguously establish the existence of this phase, and survey some of the current evidence for such a phase in the cuprate and Fe-based high temperature superconductors.
description: 30 pages, 7 figures (some in color); to appear in Annual Reviews of Condensed Matter Physics. Edited version.
title: [Bericht über die Beobachtung eines Kometen am 20. Dezember 1652 ]
Creators: name: Linemann, Albert
Publisher: name: Philipps-Universität Marburg
Year: 2023
Subjects: Astronomie
Manuscripts & rare books
Handschriften, seltene Bücher

description: Elektronische Reproduktion von: [Bericht über die Beobachtung eines Kometen am 20. Dezember 1652 ]. [Linemann, Albert (1603-1653)]. - Königsberg, 15.01.1653. - 7 Bl., Deutsch. - 
Standort: Universität Marburg, Universitätsbibliothek. - 
Signatur: Ms. 391, 2. Handschrift. - 
Bemerkungen: Nachlass Johann Magirus. In: Sammelband mit mathematischen und astronomischen Schriften des 17. Jh. (20 Drucke, 4 Hs.) . - Bibliographischer Nachweis: DE-611-HS-4107849, http://kalliope-verbund.info/DE-611-HS-4107849. - 

Digitalisiert 2023
Equation of state for hard sphere fluids with and without Kac tails
Creators: name: Trizac, E.
name: Pagonabarraga, I.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: In this note, we propose a simple derivation of the one dimensional hard rod equation of state, with and without a Kac tail (appended long range and weak potential). The case of hard spheres in higher dimension is also addressed and it is shown there that our arguments --which avoid any mathematical complication-- allow to recover the virial form of the equation of state in a direct way.
description: pedagogical paper
title: [Ein stetswehrender Calender, In welchem berichtet wirdt, in einem jeglichen Monat und tag, der auff, und niedergang der Sonnen, die ab- Und zunehmung, wie auch die Länge des Tages und der Nacht]
Creators: name: Sedlschanski, Johann Jakob
Publisher: name: Philipps-Universität Marburg
Year: 2023
Subjects: Astronomie
Manuscripts & rare books
Handschriften, seltene Bücher

description: Elektronische Reproduktion von: [Ein stetswehrender Calender, In welchem berichtet wirdt, in einem jeglichen Monat und tag, der auff, und niedergang der Sonnen, die ab- Und zunehmung, wie auch die Länge des Tages und der Nacht . Sedlschanski, Johann Jakob]. - Toruń, 1634. - 14 Bl., Deutsch. - 
Standort: Universität Marburg, Universitätsbibliothek. - 
Signatur: Ms. 391, 3. Handschrift. - 
Bemerkungen: Nachlass Johann Magirus. In: Sammelband mit mathematischen und astronomischen Schriften des 17. Jh. (20 Drucke, 4 Hs.). Widmung: "Dem Ehren Vesten und wolweisen Herren Antonio Hendrich, wolbestelten Gerichtsverwandten in der königlichen Stadt Thoren" aus Dank für dessen Unterstützung für Sedlschanski als "arme[n] Exulanten auß dem Behemischen Königreich". - Mit ausführlichen Anmerkungen von Johannis Magirus . - Bibliographischer Nachweis: DE-611-HS-4107850, http://kalliope-verbund.info/DE-611-HS-4107850. - 

Digitalisiert 2023
title: [Tractatus Astrologicus ]
Creators: name: Magirus, Johannes
Publisher: name: Philipps-Universität Marburg
Year: 2023
Subjects: Manuscripts & rare books
Handschriften, seltene Bücher
Astronomie

description: Elektronische Reproduktion von: [Tractatus Astrologicus. Magirus, Johann (1615-1697) [vermutlich]]. - Ohne Ort, 1640 [ca.]. - 17 Bl., Latein. - 
Standort: Universität Marburg, Universitätsbibliothek. - 
Signatur: Ms. 391, 4. Handschrift. - 
Bemerkungen: Nachlass Johann Magirus. In: Sammelband mit mathematischen und astronomischen Schriften des 17. Jh. (20 Drucke, 4 Hs.). - Bibliographischer Nachweis: DE-611-HS-4107851, http://kalliope-verbund.info/DE-611-HS-4107851. - 
Digitalisiert 2023
A search for transits among the δ Scuti variables in Kepler
Creators: name: Hey, Daniel R.
name: Montet, Benjamin T.
name: Pope, Benjamin J. S.
name: Murphy, Simon J.
name: Bedding, Timothy R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We search for transits around all known pulsating δ Sct variables (6500 K < Teff < 10 000 K) in the long-cadence Kepler data after subtracting the pulsation signal through an automated routine. To achieve this, we devise a simple and computationally inexpensive method for distinguishing between low-frequency pulsations and transits in light curves. We find 3 new candidate transit events that were previously hidden behind the pulsations, but caution that they are likely to be false positive events. We also examined the Kepler Objects of Interest catalog and identify 13 additional host stars which show δ Sct pulsations. For each star in our sample, we use the non-detection of pulsation timing variations for a planet that is known to be transiting a δ Sct variable to obtain both an upper limit on the mass of the planet and the expected radial velocity semi-amplitude of the host star. Simple injection tests of our pipeline imply 100% recovery for planets of 0.5 RJup or greater. Extrapolating our number of Kepler δ Sct stars, we expect 12 detectable planets above 0.5 RJup in TESS. Our sample contains some of the hottest known transiting planets around evolved stars, and is the first complete sample of transits around δ Sct variables. We make available our code and pulsation-subtracted light curves to facilitate further analysis.
description: 18 pages, accepted to AAS journals
Identification of influential spreaders in complex networks
Creators: name: Kitsak, Maksim
name: Gallos, Lazaros K.
name: Havlin, Shlomo
name: Liljeros, Fredrik
name: Muchnik, Lev
name: Stanley, H. Eugene
name: Makse, Hernan A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: Networks portray a multitude of interactions through which people meet, ideas are spread, and infectious diseases propagate within a society. Identifying the most efficient "spreaders" in a network is an important step to optimize the use of available resources and ensure the more efficient spread of information. Here we show that, in contrast to common belief, the most influential spreaders in a social network do not correspond to the best connected people or to the most central people (high betweenness centrality). Instead, we find: (i) The most efficient spreaders are those located within the core of the network as identified by the k-shell decomposition analysis. (ii) When multiple spreaders are considered simultaneously, the distance between them becomes the crucial parameter that determines the extend of the spreading. Furthermore, we find that-- in the case of infections that do not confer immunity on recovered individuals-- the infection persists in the high k-shell layers of the network under conditions where hubs may not be able to preserve the infection. Our analysis provides a plausible route for an optimal design of efficient dissemination strategies.
description: 36 pages, 20 figures
Thermodynamics of two lattice ice models in three dimensions
Creators: name: Muguruma, Chizuru
name: Okamoto, Yuko
name: Berg, Bernd A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: In a recent paper we introduced two Potts-like models in three dimensions, which share the following properties: (A) One of the ice rules is always fulfilled (in particular also at infinite temperature). (B) Both ice rules hold for groundstate configurations. This allowed for an efficient calculation of the residual entropy of ice I (ordinary ice) by means of multicanonical simulations. Here we present the thermodynamics of these models. Despite their similarities with Potts models, no sign of a disorder-order phase transition is found.
description: 5 pages, 7 figures
Aharonov-Casher Effect in Wigner Crystal Exchange Interactions
Creators: name: Tserkovnyak, Yaroslav
name: Kindermann, Markus
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We theoretically study the effects of spin-orbit coupling on spin exchange in a low-density Wigner crystal. In addition to the familiar antiferromagnetic Heisenberg exchange, we find general anisotropic interactions in spin space if the exchange paths allowed by the crystal structure form loops in real space. In particular, it is shown that the two-electron exchange interaction can acquire ferromagnetic character.
description: 4 pages, 1 figure
BotSpot: Deep Learning Classification of Bot Accounts within Twitter
Creators: name: Braker, Christopher
name: Shiaeles, Stavros
name: Bendiab, Gueltoum
name: Savage, Nick
name: Limniotis, Konstantinos
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cryptography and Security (cs.CR)
subject: Artificial Intelligence (cs.AI)
subject: Social and Information Networks (cs.SI)
subject: FOS: Computer and information sciences

description: The openness feature of Twitter allows programs to generate and control Twitter accounts automatically via the Twitter API. These accounts, which are known as bots, can automatically perform actions such as tweeting, re-tweeting, following, unfollowing, or direct messaging other accounts, just like real people. They can also conduct malicious tasks such as spreading of fake news, spams, malicious software and other cyber-crimes. In this paper, we introduce a novel bot detection approach using deep learning, with the Multi-layer Perceptron Neural Networks and nine features of a bot account. A web crawler is developed to automatically collect data from public Twitter accounts and build the testing and training datasets, with 860 samples of human and bot accounts. After the initial training is done, the Multilayer Perceptron Neural Networks achieved an overall accuracy rate of 92%, which proves the performance of the proposed approach.
description: 7 pages, 3 figures, 2 tables
Non-square-well potential profile and non-blinking effect in graded CdZnSe/ZnSe nanocrystals: An ionization-energy theoretic study
Creators: name: Arulsamy, Andrew Das
name: Cvelbar, Uros
name: Mozetic, Miran
name: Ostrikov, Kostya Ken
Publisher: name: arXiv
Year: 2009
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Randomly blinking nanocrystals have given rise to numerous and intense theoretical and experimental investigations recently. An experimental breakthrough was finally made by fabricating the non-blinking Cd$_{1-x}$Zn$_x$Se/ZnSe graded nanocrystal [Nature 459 (2009) 686]. Here, we report (1) an unequivocal and detailed theoretical investigation to understand the properties of the potential-well and the distribution of Zn content with respect to the nanocrystal radius and (2) develop a strategy to find the relationship between the photoluminescence (PL) energy peaks and the potential-well due to Zn distribution in nanocrystals. We found that the non-square-well potential can be varied in such a way that one can indeed control the PL intensity and the energy-level difference (PL energy peaks) in any non-free-electron nanocrystals accurately. This implies that we can either suppress the blinking altogether, or alternatively, manipulate the PL energy peaks and intensities systematically to give non-random blinking. Our theoretical strategy developed here is generic and can be applied to any non-free-electron nanocrystals.
description: Published online in Nanoscale (2010). Different from published version
Kaleidoscopical Configurations in G-spaces
Creators: name: Banakh, T. O.
name: Petrenko, O.
name: Protasov, I. V.
name: Slobodianiuk, S.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Combinatorics (math.CO)
subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 05C15, 20K01

description: Let $G$ be a group and $X$ be a $G$-space. A subset $F$ of $X$ is called a kaleidoscopical configuration if there exists a surjective coloring $χ:X\to Y$ such that the restriction of $χ$ on each subset $gF$, $g\in G$ is a bijection. We give some constructions of kaleidoscopical configurations in an arbitrary $G$-space, develop some kaleidoscopical technique for Abelian groups (considered as $G$-spaces with the action $(g,x)\mapsto g+x$), and describe kaleidoscopical configurations in the cyclic groups of order $N=p^m$ or $N=p_1... p_k$ where $p$ is prime and $p_1,...,p_k$ are distinct primes. Let $G$ be a group and $X$ be a $G$-space. A subset $F$ of $X$ is called a kaleidoscopical configuration if there exists a coloring $χ:X\rightarrow C$ such that the restriction of $χ$ on each subset $gF$, $g\in G$, is a bijection. We present a construction (called the splitting construction) of kaleidoscopical configurations in an arbitrary $G$-space, reduce the problem of characterization of kaleidoscopical configurations in a finite Abelian group $G$ to a factorization of $G$ into two subsets, and describe all kaleidoscopical configurations in isometrically homogeneous ultrametric spaces with finite distance scale. Also we construct $2^c$ (unsplittable) kaleidoscopical configurations of cardinality continuum in the Euclidean space $R^n$.
description: 11 pages
Chirped periodic and localized waves in a weakly nonlocal media with cubic-quintic nonlinearity
Creators: name: Triki, Houria
name: Kruglov, Vladimir I.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We study the propagation of one-dimentional optical beams in a weakly nonlocal medium exhibiting cubic-quintic nonlinearity. A nonlinear equation governing the evolution of the beam intensity in the nonlocal medium is derived thereby which allows us to examine whether the traveling-waves exist in such optical material. An efficient transformation is applied to obtain explicit solutions of the envelope model equation in the presence of all material parameters. We find that a variety of periodic waves accompanied with a nonlinear chirp do exist in the system in the presence of the weak nonlocality. Chirped localized intensity dips on a continuous-wave background as well as solitary waves of the bright and dark types are obtained in a long wave limit. A class of propagating chirped self-similar solitary beams is also identified in the material with the consideration of the inhomogeneities of media. The applications of the obtained self-similar structures are discussed by considering a periodic distributed amplification system.
Altitude-dependent polarization in radio pulsars
Creators: name: Dyks, J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Because of the corotation, the polarization angle (PA) curve of a pulsar lags the intensity profile by 4r/Rlc rad in pulse phase. I present a simple and short derivation of this delay-radius relation to show that it is not caused by the aberration (understood as the normal beaming effect) but purely by contribution of corotation to the electron acceleration in the observer's frame. Available altitude-dependent formulae for the PA curve are expressed through observables and emission altitude to make them immediately ready to use in radio data modelling. The analytical approximations for the altitude-dependent PA curve are compared with exact numerical results to show how they perform at large emission altitudes. I also discuss several possible explanations for the opposite-than-normal shift of PA curve, exhibited by the pedestal emission of B1929+10 and B0950+08.
description: 12 pages, 5 figures, accepted by MNRAS after minor changes
Superintegrability on the 3-dimensional spaces with curvature. Oscillator-related and Kepler-related systems on the Sphere $S^3$ and on the Hyperbolic space $H^3$
Creators: name: Cariñena, Jose F.
name: Rañada, Manuel F.
name: Santander, Mariano
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 37J06, 37J35, 70H06, 70H33

description: The superintegrability of several Hamiltonian systems defined on three-dimensional configuration spaces of constant curvature is studied. We first analyze the properties of the Killing vector fields, Noether symmetries and Noether momenta. Then we study the superintegrability of the Harmonic Oscillator, the Smorodinsky-Winternitz (S-W) system and the Harmonic Oscillator with ratio of frequencies 1:1:2 and additional nonlinear terms on the 3-dimensional sphere $S^3$ ($\kp>0)$ and on the hyperbolic space $H^3$ ($\kp<0$). In the second part we present a study first of the Kepler problem and then of the Kepler problem with additional nonlinear terms in these two curved spaces, $S^3$ ($\kp>0)$ and $H^3$ ($\kp<0$). We prove their superintegrability and we obtain, in all the cases, the maximal number of functionally independent integrals of motion. All the mathematical expressions are presented using the curvature $\kp$ as a parameter, in such a way that particularizing for $\kp>0$, $\kp=0$, or $\kp<0$, the corresponding properties are obtained for the system on the sphere $S^3$, the Euclidean space $\IE^3$, or the hyperbolic space $H^3$, respectively.
description: 29 pages, 2 figures
Itoplectis maculator
Creators: name: Riedel
name: Pénigot
name: Schwarz
name: Diller
name: Johansson
name: Japoshvili, G.
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Itoplectis
Itoplectis maculator

description: Itoplectis maculator (FABRICIUS, 1775)
M a t e r i a l e x a m i n e d: Trap 4: 1♀ 20.iv.-5.v., 2♀♀ 5-20.v., 1♀ 20.v.-1.vi., 1♀ 1-15.vi., 1♀ 15-29.vi.M; trap 7: 2♀♀ 23.iv.-5.v., 1♀ 20.v.-1.vi., 1♀ 27.vii.-10.viii.; trap 15: 1♀ 16-30.vi.
D i s t r i b u t i o n: Transpalaearctic, known from Georgia (MEYER 1934, KASPARYAN 1973a, RIEDEL et al. 2018, RIEDEL & JAPOSHVILI 2021).
description: Published as part of Riedel, Pénigot, Schwarz, Diller, Johansson & Japoshvili, G., 2023, Darwin wasps (Hymenoptera, Ichneumonidae) of the Kintrishi National Park, Sakartvelo (Georgia), with descriptions of six new species, pp. 61-153 in Linzer biologische Beiträge 55 (1) on page 129, DOI: 10.5281/zenodo.10415120