cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Superconductivity at 38 K in the iron arsenide (Ba1-xKx)Fe2As2
Creators: name: Rotter, Marianne
name: Tegel, Marcus
name: Johrendt, Dirk
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The ternary iron arsenide BaFe2As2 becomes superconducting by hole doping, which was achieved by partial substitution of the barium site with potassium. We have discovered bulk superconductivity up to Tc = 38 K in (Ba1-xKx)Fe2As2 with x = 0.4. The parent compound BaFe2As2 as well as KFe2As2 both crystallize in the tetragonal ThCr2Si2-type structure, which consists of (FeAs)- iron arsenide layers separated by barium or potassium ions. BaFe2As2 is a poor metal and exhibits a SDW anomaly at 140 K. By substituting Ba2+ for K+ ions we have introduced holes in the (FeAs)- layers, which suppress the SDW anomaly and induce superconductivity. This scenario is very similar to the recently discovered arsenide-oxide superconductors. The Tc of 38 K in (Ba1-xKx)Fe2As2 is the highest observed critical temperature in hole doped iron arsenide superconductors so far. Therefore, we were able to expand this class of superconductors by oxygen-free compounds with the ThCr2Si2-type structure. Our results suggest, that superconductivity in these systems essentially evolves from the (FeAs)- layers and may occur in other related compounds.
description: 4 pages, 5 figures, submitted to Phys. Rev. Lett
A Spectroscopic Study of Mass Outflows in the Interacting Binary RY Scuti
Creators: name: Grundstrom, E. D.
name: Gies, D. R.
name: Hillwig, T. C.
name: McSwain, M. V.
name: Smith, N.
name: Gehrz, R. D.
name: Stahl, O.
name: Kaufer, A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The massive interacting binary RY Scuti is an important representative of an active mass-transferring system that is changing before our eyes and which may be an example of the formation of a Wolf-Rayet star through tidal stripping. Utilizing new and previously published spectra, we present examples of how a number of illustrative absorption and emission features vary during the binary orbit. We identify spectral features associated with each component, calculate a new, double-lined spectroscopic binary orbit, and find masses of 7.1 +/- 1.2 M_sun for the bright supergiant and 30.0 +/- 2.1 M_sun for the hidden massive companion. Through tomographic reconstruction of the component spectra from the composite spectra, we confirm the O9.7 Ibpe spectral class of the bright supergiant and discover a B0.5 I spectrum associated with the hidden massive companion; however, we suggest that the latter is actually the spectrum of the photosphere of the accretion torus immediately surrounding the massive companion. We describe the complex nature of the mass loss flows from the system in the context of recent hydrodynamical models for beta Lyr, leading us to conclude RY Scuti has matter leaving the system in two ways: 1) a bipolar outflow from winds generated by the hidden massive companion, and 2) mass from the bright O9.7 Ibpe supergiant flowing from the region near the L2 point to fill out a large, dense circumbinary disk. This circumbinary disk (radius ~ 1 AU) may feed the surrounding double-toroidal nebula (radius ~ 2000 AU).
description: 41 pages with 7 tables and 11 figures, accepted to ApJ
Analyzing scientific data sharing patterns for in-network data caching
Creators: name: Copps, Elizabeth
name: Zhang, Huiyi
name: Sim, Alex
name: Wu, Kesheng
name: Monga, Inder
name: Guok, Chin
name: Würthwein, Frank
name: Davila, Diego
name: Fajardo, Edgar
Publisher: name: arXiv
Year: 2021
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: The volume of data moving through a network increases with new scientific experiments and simulations. Network bandwidth requirements also increase proportionally to deliver data within a certain time frame. We observe that a significant portion of the popular dataset is transferred multiple times to different users as well as to the same user for various reasons. In-network data caching for the shared data has shown to reduce the redundant data transfers and consequently save network traffic volume. In addition, overall application performance is expected to improve with in-network caching because access to the locally cached data results in lower latency. This paper shows how much data was shared over the study period, how much network traffic volume was consequently saved, and how much the temporary in-network caching increased the scientific application performance. It also analyzes data access patterns in applications and the impacts of caching nodes on the regional data repository. From the results, we observed that the network bandwidth demand was reduced by nearly a factor of 3 over the study period.
High Resolution $λ$=1mm CARMA Observations of Large Molecules in Orion-KL
Creators: name: Friedel, D. N.
name: Snyder, L. E.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present high resolution, Combined Array for Research in Millimeter-Wave Astronomy (CARMA), $λ$=1mm observations of several molecular species toward Orion-KL. These are the highest spatial and spectral resolution 1mm observations of these molecules to date. Our observations show that ethyl cyanide [C$_2$H$_5$CN] and vinyl cyanide [C$_2$H$_3$CN] originate from multiple cores near the Orion hot core and IRc7. Additionally we show that dimethyl ether [(CH$_3$)$_2$O] and methyl formate [HCOOCH$_3$] originate from IRc5 and IRc6 and that acetone [(CH$_3$)$_2$CO] originates only from areas where both N-bearing and O-bearing species are present.
description: 29 pages, 11 figures, accepted for publication in ApJ
Timescales of the chaos onset in the general relativistic Poynting-Robertson effect
Creators: name: De Falco, Vittorio
name: Borrelli, William
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: It has been proved that the general relativistic Poynting-Robertson effect in the equatorial plane of Kerr metric shows a chaotic behavior for a suitable range of parameters. As a further step, we calculate the timescale for the onset of chaos through the Lyapunov exponents, estimating how this trend impacts on the observational dynamics. We conclude our analyses with a discussion on the possibility to observe this phenomenon in neutron star and black hole astrophysical sources.
description: 11 pages; 4 figures; 3 tables; accepted for publication on PRD
David Rousset: Das KZ-Universum. Mit einem Nachwort von Jeremy Adler. Übers. von Olga Radetzkaja und Volker Weichsel.
Creators: name: Orth, Karin
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2020

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 69 Nr. 4 (2020)
Some preliminary remarks on a "weak" theory of linearization
Creators: name: Cecchetto, Carlo
Publisher: name: Annali Online  Lettere - Ferrara
Year: 2012

description: In questo lavoro mi soffermo su due aspetti del processo di  linearizzazione delle strutture sintattiche, ovvero la linearizzazione  degli specificatori e le lingue disarmoniche (quelle in cui l'ordine fra  testa e complemento non è uniforme nelle diverse proiezioni massimali).  Propongo di estendere al caso delle lingue disarmoniche una soluzione  originariamente proposta per spiegare la località del movimento a  destra. Ne emerge una bozza di teoria 'debole' della linearizzazione,  cioè una teoria che prevede che delle opzioni per default possano essere  sospese in determinate condizioni.
description: Annali Online  Lettere - Ferrara, II 1 (2007)
Self-organized PT-symmetry of exciton-polariton condensate in a double-well potential
Creators: name: Kalozoumis, Panayotis A.
name: Petrosyan, David
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate the dynamics and stationary states of a semiconductor exciton-polariton condensate in a double well potential. We find that upon the population build up of the polaritons by above-threshold laser pumping, coherence relaxation due to the phase fluctuations of the polaritons drives the system into a stable fixed point corresponding to a self-organized PT-symmetric phase.
description: 6 pages, 4 figures
Observation of photon-assisted tunneling in optical lattices
Creators: name: Sias, C.
name: Lignier, H.
name: Singh, Y. P.
name: Zenesini, A.
name: Ciampini, D.
name: Morsch, O.
name: Arimondo, E.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We have observed tunneling suppression and photon-assisted tunneling of Bose-Einstein condensates in an optical lattice subjected to a constant force plus a sinusoidal shaking. For a sufficiently large constant force, the ground energy levels of the lattice are shifted out of resonance and tunneling is suppressed; when the shaking is switched on, the levels are coupled by low-frequency photons and tunneling resumes. Our results agree well with theoretical predictions and demonstrate the usefulness of optical lattices for studying solid-state phenomena.
description: 5 pages, 3 figures
QORAQALPOG'ISTON RESPUBLIKASI AHOLISINING O'RTACHA YOSHI
Creators: name: Esengeldiev, Dauranbay
Publisher: name: Zenodo
Year: 2023

description: Ushbu maqolada Qoraqalpog‘iston Respublikasi hamda tumanlaridagi doimiy aholi yosh tarkibi, mehnatga layoqatli yoshdan kichiklar, mehnatga layoqatli yoshdagilar va mehnatga layoqatli yoshdan kattalar ko‘rib chiqildi. Respublika statistika boshqarmasining 2010-2022 yillardagi statistik ma’lumotlar asosida tahlil qilingan.
Quasi-periodic solutions of nonlinear random Schrödinger equations
Creators: name: Bourgain, J.
name: Wang, W. -M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Dynamical Systems (math.DS)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 37xx

description: We construct quasi-periodic solutions to the lattice nonlinear random Schroedinger equation on a set of potentials of positive measure via using a Lyapunov-Schmidt decomposition and a multiscale Newton scheme.
Axis-dependent carrier polarity in polycrystalline NaSn$_2$As$_2$
Creators: name: Nakamura, Naoto
name: Goto, Yosuke
name: Mizuguchi, Yoshikazu
Publisher: name: arXiv
Year: 2021
Subjects: subject: Applied Physics (physics.app-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Transverse thermoelectric devices consist of only one thermoelectric material, unlike conventional longitudinal thermoelectric devices that require two types of thermoelectric materials with p- and n-type polarities. However, scalable synthesis of materials that demonstrate axis-dependent carrier polarity, which is a prospective component to demonstrate the transverse thermoelectric device, is challenging. This paper reports that polycrystalline NaSn$_2$As$_2$, which was prepared by using uniaxial hot pressing, displayed axis-dependent carrier polarity. The preferred orientation of the sample was confirmed through X-ray diffraction measurements. Seebeck coefficient measurements indicate that carrier polarity depends on the measurement direction, which is consistent with recently reported results on single crystals of NaSn$_2$As$_2$. Given that our sample preparation procedure is readily scalable, the present work shows the possibility for preparing transverse thermoelectric devices using polycrystalline NaSn$_2$As$_2$ with a preferred orientation.
description: to be published in Appl. Phys. Lett. 17 pages, 5 figures
Jutta Reisinger-Weber: Silberschmiedearbeiten im unteren Weichselland. Bestandskata-log der Gold- und Silberschmiedearbeiten im Westpreußischen Landesmuseum.
Creators: name: Henkelmann, Vera
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2020

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 69 Nr. 4 (2020)
Katharina Schuchardt: Zwischen Berufsfeld und Identitätsangebot. Zum Selbstverständnis der deutschen Minderheit im heutigen Opole/Oppeln.
Creators: name: Linek, Bernard
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2020

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 69 Nr. 4 (2020)
The chiral condensate in a constant electromagnetic field
Creators: name: Cohen, Thomas D.
name: McGady, David A.
name: Werbos, Elizabeth S.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the shift of the chiral condensate in a constant electromagnetic field in the context of chiral perturbation theory. Using the Schwinger proper-time formalism, we derive a one-loop expression correct to all orders in $m_π^2 / eH$. Our result correctly reproduces a previously derived ``low-energy theorem'' for $m_π= 0$. We show that it is essential to include corrections due to non-vanishing $m_π$ in order for a low energy theorem to have any approximate regime of validity in the physical universe. We generalize these results to systems containing electric fields, and discuss the regime of validity for the results. In particular, we discuss the circumstances in which the method formally breaks down due to pair creation in an electric field.
description: 9 pages, 6 figures, LaTeX; removed extraneous section + minor revisions
A lightweight deep learning based cloud detection method for Sentinel-2A imagery fusing multi-scale spectral and spatial features
Creators: name: Li, Jun
name: Wu, Zhaocong
name: Hu, Zhongwen
name: Jian, Canliang
name: Luo, Shaojie
name: Mou, Lichao
name: Zhu, Xiao Xiang
name: Molinier, Matthieu
Publisher: name: arXiv
Year: 2021
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Clouds are a very important factor in the availability of optical remote sensing images. Recently, deep learning-based cloud detection methods have surpassed classical methods based on rules and physical models of clouds. However, most of these deep models are very large which limits their applicability and explainability, while other models do not make use of the full spectral information in multi-spectral images such as Sentinel-2. In this paper, we propose a lightweight network for cloud detection, fusing multi-scale spectral and spatial features (CDFM3SF) and tailored for processing all spectral bands in Sentinel- 2A images. The proposed method consists of an encoder and a decoder. In the encoder, three input branches are designed to handle spectral bands at their native resolution and extract multiscale spectral features. Three novel components are designed: a mixed depth-wise separable convolution (MDSC) and a shared and dilated residual block (SDRB) to extract multi-scale spatial features, and a concatenation and sum (CS) operation to fuse multi-scale spectral and spatial features with little calculation and no additional parameters. The decoder of CD-FM3SF outputs three cloud masks at the same resolution as input bands to enhance the supervision information of small, middle and large clouds. To validate the performance of the proposed method, we manually labeled 36 Sentinel-2A scenes evenly distributed over mainland China. The experiment results demonstrate that CD-FM3SF outperforms traditional cloud detection methods and state-of-theart deep learning-based methods in both accuracy and speed.
ESR study of transition metal ions diffused into sodium -alumina
Creators: name: Abello, Lawrence
Publisher: name: University of British Columbia
Year: 2010

description: ESR measurements are reported on the transition metal ions Mn²⁺ and Cu²⁺ diffused into sites in, and adjacent to, the conduction planes of sodium β"-alumina single crystals. The spin- Hamiltonian parameters obtained for Mn²⁺ are g[sub] = 2.0000(2), G[sub ┴] = 2.0019(2), A [sub] = -8.39(3) mT, A[sub ┴] = -8.33 mT and D = - 7.20(5) mT. The Mn²⁺ ions occupy the Al(3) sites adjacent to the conduction planes. The symmetry of the Cu²⁺ spectra place the Cu²⁺ ions at the mid-oxygen sites of the conduction planes. The complex spectra are a superposition of several different configurations of ions around this site which change as a function of the amount of Cu²⁺ diffused. The angular variations of the spectra can be divided into two main types: an anisotropic site symmetry with spin-Hamiltonian parameters g[sub] =11- 2.355, g[sub a ┴] , 2.087, A [sub] = 12.0 mT, A[sub a┴] 2.0 - 4.0 mT, and a more isotropic site symmetry with g [sub i] = 2.003, g[sub i┴] = 2.240, A[sub i] = 9.9 mT, A[sub i ┴] = 8.8 mT. These spectra are visible at liquid- helium temperatures. In addition an anisotropic, random-type spectrum is observed to replace the Cu²⁺ spectra as the temperature of annealed crystals is increased. This is attributed to the thermal motion of the Cu²⁺ ions due to their weak binding to the site. Suitable doping and annealing procedures to diffuse Mn²⁺ and Cu²⁺ into sodium β"-alumina are discussed and contrasted with the markedly different procedures in the case of the β structure.
mobilenet-v1-ssd300.pytorch model
Creators: name: Hubara, Itay
Publisher: name: Zenodo
Year: 2019

description: Application:  Single-stage Object Detection

Base model: MobileNet-v1

Framework: pytorch1.1

Training Information: weights were imported from the equivalent TF model

Quality: The COCO mAP(IoU=0.50:0.95) on 5000 validation images is 23.0%

Precision: single-precision float

Is Quantized: No

Dataset: COCO val-2017
La Cazzaria di Vignali e Il libro dei perchè di Manfredi
Creators: name: Cherchi, Paolo
Publisher: name: Annali Online  Lettere - Ferrara
Year: 2012

description: Vignali's La Cazzaria (ca. 1520) is one of the earliest experiments of  obscene or sotadic literature in Italian, a genre which finds its models  in the Latin priapaea. Vignali's lengthy treatise is an academic  exercise which fakes a scientific mode of describing and extolling the  nature and the functions of the genitalia, mostly of the penis. The  article maintains that the "scientific" model behind the work is the Libro del perché by Gerolamo Manfredi, a work based on the tradition of the problemata of Aristotelian type. This model is supposed to dignify the obscenity of La Cazzaria and at the same time to enhance its comic quality.
description: Annali Online  Lettere - Ferrara, II 1 (2007)
АKАDEMIK PRОKRАSTINАTSIYА: TАLАBА VА PEDАGОGLАR О'RTАSIDА SОLISHTIRMА TАHLIL
Creators: name: О'rоzbоevа, Gulshаnоy
Publisher: name: Zenodo
Year: 2025

description: Ushbu mаqоlа аkаdemik prоkrаstinаtsiyаning tаlаbа vа pedаgоglаr оrаsidаgi fаrqlаrini о‘rgаnishgа qаrаtilgаn. Mаqsаd prоkrаstinаtsiyаning tаlаbаlаrdа vа pedаgоglаrdа qаndаy nаmоyоn bо‘lishi, ulаrning о‘quv jаrаyоnigа tа'siri vа bu hоlаtgа bо‘lgаn yоndаshuvlаrni tаhlil qilishdir. Mаqоlаdа prоkrаstinаtsiyаning аsоsiy sаbаblаri sifаtidа vаqtni bоshqаrishdаgi qiyinchiliklаr, mоtivаtsiyа pаsаyishi vа stress оmillаri kо‘rib chiqilаdi. Tаlаbа vа pedаgоglаrning bu muаmmоni qаndаy qаbul qilishi vа ungа qаndаy munоsаbаtdа bо‘lishi sоlishtirilаdi. Shuningdek, mаqоlаdа prоkrаstinаtsiyаni yengish uchun pedаgоgik yоndаshuvlаr vа sаmаrаli strаtegiyаlаrni ishlаb chiqish, shuningdek, bu muаmmоni о‘qitish jаrаyоnidа qаndаy hаl qilish mumkinligi hаqidа tаvsiyаlаr berilаdi.
Intertextualidad y parodia en La vida es sueño: la oración de Basilio (vv. 589-843)
Creators: name: Tanganelli, Paolo
Publisher: name: Annali Online  Lettere - Ferrara
Year: 2012

description: La lunga orazione di Basilio (indipendentemente da quanto siano solidi i vincoli intertestuali che forse la collegano alla Declamatio Maior IV dello Pseudo-Quintiliano) sembra ispirarsi a quegli esercizi retorici noti come controversiae o declamationes, pertinenti al genus iudiciale. Il fondamento auto-parodico di questo discorso si palesa soprattutto nella narratio, in cui parrebbe venir recuperato il modello epidittico di descriptio personarum dei Progymnasmata dello Pseudo-Ermogene: Segismundo, non potendo aver commesso alcun  delitto visto che è stato recluso in fasce, può essere solo vituperato, e  non realmente accusato, da Basilio. Il climax si raggiunge nel momento  in cui il re di Polonia, improvvidamente, rievoca la serie di spaventosi  signa precedente la nascita del figlio, giacché in questo punto  Calderón de la Barca innesta un frammento della leggenda di Nectanebo (Historia de preliis - recensione J2)  che di fatto identifica Segismundo con un nuovo Alessandro Magno. Il  vituperio manifesto si trasforma così in elogio velato e occulta  profezia: Segismundo è infatti destinato a conquistare con le armi la  corona.
description: Annali Online  Lettere - Ferrara, II 1 (2007)
Renormalization group analysis of near-field induced dephasing of optical spin waves in an atomic medium
Creators: name: Grava, Stefano
name: He, Yizun
name: Wu, Saijun
name: Chang, Darrick E.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: While typical theories of atom-light interactions treat the atomic medium as being smooth, it is well-known that microscopic optical effects driven by atomic granularity, dipole-dipole interactions, and multiple scattering can lead to important effects. Recently, for example, it was experimentally observed that these ingredients can lead to a fundamental, density-dependent dephasing of optical spin waves in a disordered atomic medium. Here, we go beyond the short-time and dilute limits considered previously, to develop a comprehensive theory of dephasing dynamics for arbitrary times and atomic densities. In particular, we develop a novel, non-perturbative theory based on strong disorder renormalization group, in order to quantitatively predict the dominant role that near-field optical interactions between nearby neighbors has in driving the dephasing process. This theory also enables one to capture the key features of the many-atom dephasing dynamics in terms of an effective single-atom model. These results should shed light on the limits imposed by near-field interactions on quantum optical phenomena in dense atomic media, and illustrate the promise of strong disorder renormalization group as a method of dealing with complex microscopic optical phenomena in such systems.
description: 15 pages, 5 figures
La "parola azione": poesia e teatro in Yeats
Creators: name: Gasparini, Francesca
Publisher: name: Annali Online  Lettere - Ferrara
Year: 2012

description: Starting from preceding revelations on W.B. Yeats, the essay is an  attempt to loosen up some mysterious and intricate knots of his  experience on theatre and poetry. Trying to open the way to a plural  perspective on the practices of the Irish poet and to display the  subterranean communication between theatre theory, dramatic writing,  poetic writing, folkloric/anthropologic research, theatre practice and  experimentation, is it possible to find out new traces that ask to be  followed. The trace here is what we can call "word in action" as a key  to detect three examples: Yeats' translations of Sophocles for the  theatre, the passage from poetry to drama in some Yeats's composistions  and Yeats' work on radio broadcasts from 1931 to 1938.
description: Annali Online  Lettere - Ferrara, II 1 (2007)
Symmetry and magnetically driven ferroelectricity in rare-earth manganites RMnO3 (R=Gd, Tb, Dy)
Creators: name: Ribeiro, J. L.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: This work investigates the magnetically driven ferroelectricity in orthorhombic manganites RMnO3 (R=Gd, Dy or Tb) from the point of view of the symmetry. The method adopted generalizes the one used to characterize the polar properties of displacive modulated structures to the case of an irreducible magnetic order parameter. The symmetry conditions for magnetically induced ferroelectricity are established and the Landau-Devonshire free energy functionals derived from general symmetry considerations. The ferroelectric polarisation observed in DyMnO3 and TbMnO3 at zero magnetic field is explained in terms of the symmetry of a reducible magnetic order parameter. The polarisation rotation induced in these compounds by external magnetic fields and the stabilization of a ferroelectric phase in GdMnO3 are accounted for by a mechanism in which magnetization and polarization are secondary order parameters that are not directly coupled but compete with each other through their coupling to competing primary modulated order parameters.
description: Article submitted to Physical Review B, 39 pages
Stubborn Structures. Reconceptualizing Post-Communist Regimes. Hrsg. von Bálint Magyar.
Creators: name: Behrends, Jan Claas
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2020

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 69 Nr. 4 (2020)
On the bipolarity of Wolf-Rayet nebulae
Creators: name: Meyer, D. M. -A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Wolf-Rayet stars are amongst the rarest but also most intriguing massive stars. Their extreme stellar winds induce famous multi-wavelength circumstellar gas nebulae of various morphologies, spanning from circles and rings to bipolar shapes. This study is devoted to the investigation of the formation of young, asymmetric Wolf-Rayet gas nebulae and we present a 2.5-dimensional magneto-hydrodynamical toy model for the simulation of Wolf-Rayet gas nebulae generated by wind-wind interaction. Our method accounts for stellar wind asymmetries, rotation, magnetisation, evolution and mixing of materials. It is found that the morphology of the Wolf-Rayet nebulae of blue supergiant ancestors is tightly related to the wind geometry and to the stellar phase transition time interval, generating either a broadened peanut-like or a collimated jet-like gas nebula. Radiative transfer calculations of our Wolf-Rayet nebulae for dust infrared emission at 24 $μ$m show that the projected diffuse emission can appear as oblate, bipolar, ellipsoidal or ring structures. Important projection effects are at work in shaping observed Wolf-Rayet nebulae. This might call a revision of the various classifications of Wolf-Rayet shells, which are mostly based on their observed shape. Particularly, our models question the possibility of producing pre-Wolf-Rayet wind asymmetries, responsible for bipolar nebulae like NGC 6888, within the single red supergiant evolution channel scenario. We propose that bipolar Wolf-Rayet nebulae can only be formed within the red supergiant scenario by multiple/merged massive stellar systems, or by single high-mass stars undergoing additional, e.g. blue supergiant, evolutionary stages prior to the Wolf-Rayet phase.
description: 18 pages, 10 figures
Embedding products of graphs into Euclidean spaces
Creators: name: Skopenkov, Mikhail
Publisher: name: arXiv
Year: 2008
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57Q35, 57Q45

description: For any collection of graphs we find the minimal dimension d such that the product of these graphs is embeddable into the d-dimensional Euclidean space. In particular, we prove that the n-th powers of the Kuratowsky graphs are not embeddable into the 2n-dimensional Euclidean space. This is a solution of a problem of Menger from 1929. The idea of the proof is the reduction to a problem from so-called Ramsey link theory: we show that any embedding of L into the (2n-1)-dimensional sphere, where L is the join of n copies of a 4-point set, has a pair of linked (n-1)-dimensional spheres.
description: in English and in Russian, 5 pages, 2 figures. Minor improvement of exposition, a reference to a popular-science introduction added
Large Bi-2212 single crystal growth by the floating-zone technique
Creators: name: Wen, J. S.
name: Xu, Z. J.
name: Xu, G. Y.
name: Hücker, M.
name: Tranquada, J. M.
name: Gu, G. D.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Effects of the growth velocity on the crystal growth behavior of Bi_2Sr_2Ca_1Cu_2O_x (Bi-2212) have been studied by floating zone technique. The results show that a necessary condition for obtaining large single crystals along the c-axis is that the solid-liquid interface of a growing rod maintains a stable planar growth front. The planar liquid-solid growth interface tends to break down into a cellular interface, while the growth velocity is higher than 0.25 mm/h. Single crystals of up to 50x7.2x7 mm3 along the a-, b- and caxes have been cut in a 7.2 mm diameter rod with optimum growth conditions. Tconset is 91 K measured by magnetic properties measurement system (MPMS) for as-grown crystals. Optical polarization microscope and neutron diffraction show that the quality of the single crystals is good.
description: 5 pages, 4 figures
GRB060218 and GRBs associated with Supernovae Ib/c
Creators: name: Dainotti, Maria Giovanna
name: Bernardini, Maria Grazia
name: Bianco, Carlo Luciano
name: Caito, Letizia
name: Guida, Roberto
name: Ruffini, Remo
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We plan to fit the complete gamma- and X-ray light curves of the long duration GRB060218, including the prompt emission, in order to clarify the nature of the progenitors and the astrophysical scenario of the class of GRBs associated to SNe Ib/c. The initial total energy of the electron-positron plasma E_{e^\pm}^{tot}=2.32\times 10^{50} erg has a particularly low value similarly to the other GRBs associated with SNe. For the first time we observe a baryon loading B=10^{-2} which coincides with the upper limit for the dynamical stability of the fireshell. The effective CircumBurst Medium (CBM) density shows a radial dependence n_{cbm} \propto r^{-α} with 1.0
description: 4 pages, 3 figures, to appear in A&A Letters
Phase-sensitive nonclassical properties in quantum metrology with a displaced squeezed vacuum state
Creators: name: Tao, Zhiwei
name: Ren, Yichong
name: Abdukirim, Azezigul
name: Liu, Shiwei
name: Rao, Ruizhong
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We predict that the phase-dependent error distribution of locally unentangled quantum states directly affects quantum parameter estimation accuracy. Therefore, we employ the displaced squeezed vacuum (DSV) state as a probe state and investigate an interesting question of the phase-sensitive nonclassical properties in DSV's metrology. We found that the accuracy limit of parameter estimation is a function of the phase-sensitive parameter $ϕ-θ/2$ with a period $π$. We show that when $ϕ-θ/2$ $\in \left[ kπ/2,3kπ/4\right) \left( k\in \mathbb{Z}\right)$, we can obtain the accuracy of parameter estimation approaching the ultimate quantum limit through using the DSV state with the larger displacement and squeezing strength, whereas $ϕ-θ/2$ $\in \left(3kπ/4,kπ\right] \left( k\in \mathbb{Z}\right) $, the optimal estimation accuracy can be acquired only when the DSV state degenerates to a squeezed-vacuum state.
description: 7 pages, 5 figures
David Kowalski: Polens letzte Juden. Herkunft und Dissidenz um 1968.
Creators: name: Kosmala, Beate
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2020

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 69 Nr. 4 (2020)
Kulturtransfer und Verlagsarbeit. Suhrkamp und Osteuropa. Hrsg. von Dirk Kemper, Paweł Zajas und Natalia Bakshi.
Creators: name: Birger, Maria
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2020

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 69 Nr. 4 (2020)
A one-parameter family of dendriform identities
Creators: name: Novelli, Jean-Christophe
name: Thibon, Jean-Yves
Publisher: name: arXiv
Year: 2007
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05E05, 17A30

description: We prove a q-identity in the dendriform dialgebra of colored free quasi-symmetric functions. For q=1, we recover identities due to Ebrahimi-Fard, Manchon, and Patras, in particular the noncommutative Bohnenblust-Spitzer identity.
description: 12 pages, LaTEX
The atlas of ferroicity in two dimensional MGeX3 family: room-temperature ferromagnetic half metals and unexpected ferroelectricity and ferroelasticity
Creators: name: Hao, Kuan-Rong
name: Ma, Xing-Yu
name: Lyu, Hou-Yi
name: Zhu, Zhen-Gang
name: Yan, Qing-Bo
name: Su, Gang
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Two-dimensional (2D) ferromagnetic and ferroelectric materials attract unprecedented attention due to the spontaneous-symmetry-breaking induced novel properties and multifarious potential applications. Here we systematically investigate a large family (148) of 2D MGeX3 (M = metal elements, X = O/S/Se/Te) by means of the high-throughput first-principles calculations, and focus on their possible ferroic properties including ferromagnetism, ferroelectricity, and ferroelasticity. We discover eight stable 2D ferromagnets including five semiconductors and three half-metals, 21 2D antiferromagnets, and 11 stable 2D ferroelectric semiconductors including two multiferroic materials. Particularly, MnGeSe3 and MnGeTe3 are predicted to be room-temperature 2D ferromagnetic half metals with Tc of 490 and 308 K, respectively. It is probably for the first time that ferroelectricity is uncovered in 2D MGeX3 family, which derives from the spontaneous symmetry breaking induced by unexpected displacements of Ge-Ge atomic pairs, and we also reveal that the electric polarizations are in proportion to the ratio of electronegativity of X and M atoms, and IVB group metal elements are highly favored for 2D ferroelectricity. Magnetic tunnel junction and water-splitting photocatalyst based on 2D ferroic MGeX3 are proposed as examples of wide potential applications. The atlas of ferroicity in 2D MGeX3 materials will spur great interest in experimental studies and would lead to diverse applications.
description: 25 pages, 6 figures
ICHKI TURIZIMDA ONLAYN-GID XIZMATLARINI RIVOJLANTIRISH
Creators: name: Nabiyev, Raxim
Publisher: name: Zenodo
Year: 2023

description: Ichki turizm sohasida onlayn-gid xizmatlarini rivojlantirish, sayohatchilar uchun yangi imkoniyatlarni o’z ichiga olgan innovatsion yondashuvdir. Bu mahsulotlar, turistlarga sayohatlarini boshqarish, buyurtmalarini qabul qilish, mehmonxonalarni va transport xizmatlarini tanlash va boshqa turistik ko’rsatishlarini samarali va qulay qilishda yordam beradi. Ichki turizm sohasidagi onlayn-gid xizmatlarining rivojlantirishini o’z ichiga oladi.
The Impact of Electric Cars on Oil Demand and Greenhouse Gas Emissions in Key Markets
Creators: name: Gómez Vilchez, Jonatan J.
Publisher: name: KIT Scientific Publishing
Year: 2019
Subjects: Elektroauto
Systemdynamik
Öl-Nachfrage
Treibhausgasemissionen
Simulierung
electric car
system dynamics
oil demand
greenhouse gas emissions
simulation

description: This book explores the extent to which electric cars might reduce oil demand and greenhouse gas emissions in key markets: China, France, Germany, India, Japan and the United States. The developed model consists of an econometric sub-model, soft-linked with a system dynamics sub-model. The model captures feedback loops that may stimulate the market development of electric cars. The six countries are interlinked to simulate technological progress concerning the electric vehicle battery.
Neutron radii from low energy pion scattering
Creators: name: Gyles, William
Publisher: name: University of British Columbia
Year: 2010

description: Recent electron scattering measurements and muonic atom studies have allowed precise determinations of the charge distributions of nuclei. Measurements of the neutron distributions, however, have not progressed to this degree of sophistication, largely because of the uncertainties in the hadron-nucleus interaction. Charge distribution measurements provide good tests of nuclear structure calculations, but measurements of neutron distributions will provide independent constraints on these calculations and the potentials used. In this experiment, π⁻ differential cross section ratios were measured on pairs of isotopes (³⁶S, ³²S), (³⁴S,³²S) with 50 MeV pions and (²⁶Mg, ²⁴Mg) with 45 MeV pions. Absolute differential cross sections were also measured for ³²S and ²⁴Mg. Magnetic spectrometers were used to collect the data. The cross section ratios were compared to optical model calculations in which the parameters of a Fermi function representing the neutron distribution of the larger isotope of each pair were varied. The rms radius difference between the two isotopes producing the best fit was found to be independent of the details of the optical potential used, as long as the potential produced a fit to the absolute cross sections. The neutron distribution of the larger isotope was also represented as a Fermi function modified by a sum of spherical Bessel functions, the coefficients of which were allowed to vary. The results for the rms radius differences were consistent with the Fermi function fits, except for ³⁴S -³²S, where the results differed by a full standard deviation. The rms radius differences found for the sulfur isotopes agreed with the results of shell-model calculations by Hodgson (Str82,Hod83). The extracted rms radius difference of the magnesium isotopes was one standard deviation less than the shell-model prediction. The results for the Fermi function fits, Fourier Bessel fits and the single particle potential (SPP) calculations by Hodgson (Hod83) are: [See Thesis for Diagram].
Transport through constricted quantum Hall edge systems: beyond the quantum point contact
Creators: name: Lal, Siddhartha
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Motivated by surprises in recent experimental findings, we study transport in a model of a quantum Hall edge system with a gate-voltage controlled constriction. A finite backscattered current at finite edge-bias is explained from a Landauer-Buttiker analysis as arising from the splitting of edge current caused by the difference in the filling fractions of the bulk ($ν_{1}$) and constriction ($ν_{2}$) quantum Hall fluid regions. We develop a hydrodynamic theory for bosonic edge modes inspired by this model. The constriction region splits the incident long-wavelength chiral edge density-wave excitations among the transmitting and reflecting edge states encircling it. The competition between two interedge tunneling processes taking place inside the constriction, related by a quasiparticle-quasihole (qp-qh) symmetry, is accounted for by computing the boundary theories of the system. This competition is found to determine the strong coupling configuration of the system. A separatrix of qp-qh symmetric gapless critical states is found to lie between the relevant RG flows to a metallic and an insulating configuration of the constriction system. This constitutes an interesting generalisation of the Kane-Fisher quantum impurity model. The features of the RG phase diagram are also confirmed by computing various correlators and chiral linear conductances of the system. In this way, our results find excellent agreement with many recent puzzling experimental results for the cases of $ν_{1}=1/3,~1$. We also discuss and make predictions for the case of a constriction system with $ν_{2}=5/2$.
description: 18 pages, 9 figures
An Invariant Characterization of the Levi-Civita Spacetimes
Creators: name: Watson, C. K.
name: Julius, W.
name: Gorban, M.
name: McNutt, D. D.
name: Davis, E. W.
name: Cleaver, G. B.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In the years 1917-1919 Tullio Levi-Civita published a number of papers presenting new solutions to Einstein's equations. This work, while partially translated, remains largely inaccessible to English speaking authors. In this paper we review these solutions, and present them in a modern, readable manner. We will also compute both Cartan-Karlhede and Carminati-Mclenaghan invariants such that these solutions are invariantly characterized by two distinct methods. These methods will allow for these solutions to be totally, and invariantly characterized. Because of the variety of solutions considered here, this paper will also be a useful reference for those seeking to learn to apply the Cartan-Karlhede algorithm in practice.
Die Akademien der Wissenschaften in Zentraleuropa im Kalten Krieg. Transformationsprozesse im Spannungsfeld von Abgrenzung und Annäherung. Hrsg. von Johannes Feichtinger und Heidemarie Uhl.
Creators: name: Volf, Darina
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2020

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 69 Nr. 4 (2020)
Der Sudetendeutsche Tag. Zur demonstrativen Festkultur von Heimatvertriebenen. Hrsg. von Elisabeth Fendl.
Creators: name: Zimmermann, Niklas
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2020

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 69 Nr. 4 (2020)
MHealth: An Artificial Intelligence Oriented Mobile Application for Personal Healthcare Support
Creators: name: Afrah, Ismail Ali
name: Kose, Utku
Publisher: name: arXiv
Year: 2021
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Main objective of this study is to introduce an expert system-based mHealth application that takes Artificial Intelligence support by considering previously introduced solutions from the literature and employing possible requirements for a better solution. Thanks to that research study, a mobile software system having Artificial Intelligence support and providing dynamic support against the common health problems in daily life was designed-developed and it was evaluated via survey and diagnosis-based evaluation tasks. Evaluation tasks indicated positive outcomes for the mHealth system.
description: 17 pages, 5 figures
Cleotyche (Cleotyche) mariae Emeljanov 1997
Creators: name: Constant, Jérôme
name: Semeraro, Linda
name: Moir, Melinda L.
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Dictyopharidae
Cleotyche
Cleotyche mariae

description: Cleotyche (Cleotyche) mariae Emeljanov, 1997
Figs 6, 11–12, Table 1
Diagnosis
The species can be separated from the other Cleotyche (Cleotyche) species by the combination of the following characters:
1. Profemora rather broad, only 2.91 × as long as broad, and slightly narrower than protibiae (Fig. 1C). 2. Vertex rather elongate, 2.04 × as long as broad (Figs 11B, 12B).
3. Vertex and anterior portion of pronotum pale brown (Figs 11B, 12B).
Differential diagnosis
This species differs from C. (Cleotyche) christinae sp. nov. and C. (Cleotyche) montana sp. nov., by the proportions of the profemora (profemora 2.91 × as long as broad vs min. 3.16 × in the two other species).
The most similar species is C. (Cleotyche) francescoi sp. nov. which additionally differs by having broader profemora (2.55 × as long as broad vs 2.91 × in C. (Cleotyche) mariae) and less elongate vertex (1.71 × as long as broad vs 2.04 × in C. (Cleotyche) mariae).
Material examined
Holotype (examined from photographs – Fig. 11) AUSTRALIA • ♂; [New South Wales, Pearl Beach]; [33°32′59″ S, 151°17′57″ E]; [13 Mar. 1997]; Emeljanov leg.; “Australia, NSW, Pearl Beach, 13.III.1997, Emeljanov”; “Holotypus Cleotyche mariae Emeljanov 1997 ”; “ANIC Database No. 20 011325”; ANIC.
Paratype (examined from photographs – Fig. 12) AUSTRALIA • ♀; [New South Wales, Pearl Beach]; [33°32′59″ S, 151°17′57″ E]; [9 Mar. 1997]; Emeljanov leg.; “Australia, NSW, Pearl Beach, 9.III.1997, Emeljanov”; “Paratypus Cleotyche mariae Emeljanov 1997 ”; “ANIC Database No. 20 011326”; ANIC.
Supplementary description
MEASUREMENTS AND RATIOS. LTg/BTg = 1.17; LV/BV = 2.04; LF/BF = 3.94; LPf/BPf = 2.91; LPt/ BPt = 2.93.
Distribution
Australia, New South Wales, Pearl Beach (Fig. 6).
description: Published as part of Constant, Jérôme, Semeraro, Linda & Moir, Melinda L., 2022, Australian Cleotychini planthoppers: review of the genus Cleotyche Emeljanov, 1997 with three new species (Hemiptera: Fulgoromorpha: Dictyopharidae), pp. 66-95 in European Journal of Taxonomy 836 on pages 83-86, DOI: 10.5852/ejt.2022.836.1917, http://zenodo.org/record/7061621
Maren Hachmeister: Selbstorganisation im Sozialismus. Das Rote Kreuz in Polen und der Tschechoslowakei 1945–1989.
Creators: name: Zok, Michael
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2020

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 69 Nr. 4 (2020)
Eden für jeden? Touristische Sehnsuchtsorte in Mittel- und Osteuropa von 1945 bis zur Gegenwart. Hrsg. von Bianca Hoenig und Hannah Wadle.
Creators: name: Hartwich, Mateusz J.
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2020

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 69 Nr. 4 (2020)
Scattering of twist fields from D-branes and orientifolds
Creators: name: Lawrence, Albion
name: Sever, Amit
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We compute the two-point function for Z_N orbifold twist fields on the disk and RP2. We apply this to a computation of the O(g_s) correction to the Kahler potential for (the symmetric combination of) blow-up modes in type I string theory on T^6/Z_3. This is related by supersymmetry to the one-loop field dependent correction to the Fayet-Iliopoulos D-term for the anomalous U(1) factor. We find this correction to be non-vanishing away from the orbifold point.
description: 34 pages, 8 figures. v2 -- references added
Annika Elisabet Frieberg: Peace at All Costs. Catholic Intellectuals, Journalists, and Media in Postwar Polish-German Reconciliation.
Creators: name: Okoński, Krzysztof
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2020

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 69 Nr. 4 (2020)