cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Space-time coding techniques with bit-interleaved coded modulations for MIMO block-fading channels
Creators: name: Gresset, Nicolas
name: Brunel, Loic
name: Boutros, Joseph
Publisher: name: arXiv
Year: 2007
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: The space-time bit-interleaved coded modulation (ST-BICM) is an efficient technique to obtain high diversity and coding gain on a block-fading MIMO channel. Its maximum-likelihood (ML) performance is computed under ideal interleaving conditions, which enables a global optimization taking into account channel coding. Thanks to a diversity upperbound derived from the Singleton bound, an appropriate choice of the time dimension of the space-time coding is possible, which maximizes diversity while minimizing complexity. Based on the analysis, an optimized interleaver and a set of linear precoders, called dispersive nucleo algebraic (DNA) precoders are proposed. The proposed precoders have good performance with respect to the state of the art and exist for any number of transmit antennas and any time dimension. With turbo codes, they exhibit a frame error rate which does not increase with frame length.
description: Submitted to IEEE Trans. on Information Theory, Submission: January 2006 - First review: June 2007
Memorie dal sottosuolo moscovita Il più grande bunker del mondo
Creators: name: Toson, Christian
Publisher: name: La Rivista di Engramma
Year: 2021
Subjects: Moscow subway
Bunker
Underground fortification
Memories from the underground

description: The Moscow subway, among its many functions, is also an immense defensive system. This article aims to reconstruct the relationship between architecture and military purposes of this infrastructure, using recent historical documentation from declassified documents. Since its design stage, the Moscow metro was heavily influenced by military requirements, that may have been drawn from Italian air defensive theory. Through the memories of Chruščëv, who is intimately connected with the Metro, the article describes its history, during the heroic period of construction, across the Battle for Moscow, the post-War reconstruction and the atomic era. An important focus is given to the continuously changing of meanings and imageries that connect the infrastructure, the city, and architecture; using also iconographic and filmographic material as a reference.
Assessing Speech Acts of Curses and Prayers in Persian
Creators: name: Sharifi, Shahla
name: Ebrahimi, Shima
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 440105
subject: Linguistic anthropology

description: Speech acts are of great importance primarily within the bounds of semantics and should be on the basis of mutually shared back ground information between hearer and speaker. Curses and prayers are commonly used in every day language. Whenever some one does a favor to us, we may say a prayer to God for him/her. We may curse at some one for making us angry or sad. By and large, we express our inner feelings and attitudes towards the hearer through saying prayers or curses: therefore, they are involved in expressive speech acts. The present article delivers a special classification of prayers and curses which are as follows: a) prayers and curses which are closely associated with our culture, tradition and religion; b) prayers and curses which have been progresses and produced gradually and no specific cultural root can be traced for them. This type of speech acts is itself classified into two categories: the first one is composed of prayers and curses which are frequently used by children in different contexts and the second category comprises those prayers and curses which English speakers have in common with Persian speakers.
The abelian cosets of the Heisenberg group
Creators: name: D'Appollonio, Giuseppe
name: Quella, Thomas
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper we study the abelian cosets of the H(4) WZW model. They coincide or are related to several interesting three-dimensional backgrounds such as the Melvin model, the conical point-particle space-times and the null orbifold. We perform a detailed CFT analysis of all the models and compute the coset characters as well as some typical three-point couplings of coset primaries.
description: 26 pages; v2: minor typos corrected, also added section 3.3 and 4.3 with a few comments on a third class of geometries that have not been discussed in v1
Supplementary File S1_STARD-BLCM checklist-.pdf
Creators: name: Elsohaby, Ibrahim
Publisher: name: figshare
Year: 2021
Subjects: subject: 70203 Animal Management
subject: FOS: Animal and dairy science
subject: 70704 Veterinary Epidemiology
subject: FOS: Veterinary sciences
subject: 70703 Veterinary Diagnosis and Diagnostics

description: Standards for Reporting of Diagnostic accuracy studies that use Bayesian latent class models
On extension of Calderón-Zygmund type singular integrals and their commutators
Creators: name: Bagchi, Sayan
name: Garg, Rahul
name: Singh, Joydwip
Publisher: name: arXiv
Year: 2022
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: Analysis of PDEs (math.AP)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: Primary 42B20, Secondary 42B35, 42B37

description: Motivated by the recent works [Huan Yu, Quansen Jiu, and Dongsheng Li, 2021] and [Yanping Chen and Zihua Guo, 2021], we study the following extension of Calderón-Zygmund type singular integrals $$ T_βf (x) = p.v. \int_{\mathbb{R}^n} \frac{Ω(y)}{|y|^{n-β}} f(x-y) \, dy, $$ for $0 < β< n$, and their commutators. We establish estimates of these singular integrals on Lipschitz spaces, Hardy spaces and Muckenhoupt $A_p$-weighted $L^p$-spaces. We also establish Lebesgue and Hardy space estimates of their commutators. Our estimates are uniform in small $β$, and therefore one can pass onto the limits as $β\to 0$ to deduce analogous estimates for the classical Calderón-Zygmund type singular integrals and their commutators.
description: 27 pages, submitted
Trilepton production at the CERN LHC: Standard model sources and beyond
Creators: name: Sullivan, Zack
name: Berger, Edmond L.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Events with three or more isolated leptons in the final state are known to be signatures of new physics phenomena at high energy collider physics facilities. Standard model sources of isolated trilepton final states include gauge boson pair production such as $WZ$ and $Wγ^*$, and $t\bar{t}$ production. We demonstrate that leptons from heavy flavor decays, such as $b \to lX$ and $c \to lX$, provide sources of trileptons that can be orders-of-magnitude larger after cuts than other standard model backgrounds to new physics processes. We explain the physical reason heavy flavor backgrounds survive isolation cuts. We propose new cuts to control the backgrounds in the specific case of chargino plus neutralino pair production in supersymmetric models. After these cuts are imposed, we show that it should be possible to find at least a 4 sigma excess for supersymmetry parameter space point LM9 with 30 fb$^{-1}$ of integrated luminosity.
description: 33 pgs, 17 figs, revtex; repaired damaged latex source
The dynamics of the TRAPPIST-1 system in the context of its formation
Creators: name: Huang, Shuo
name: Ormel, Chris W.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: TRAPPIST-1 is an 0.09 $M_{\odot}$ star, which harbours a system of seven Earth-sized planets. Two main features stand out: (i) all planets have similar radii, masses, and compositions; and (ii) all planets are in resonance. Previous works have outlined a pebble-driven formation scenario where planets of similar composition form sequentially at the H$_2$O snowline (${\sim}0.1$ au for this low-mass star). It was hypothesized that the subsequent formation and migration led to the current resonant configuration. Here, we investigate whether the sequential planet formation model is indeed capable to produce the present-day resonant configuration, characterized by its two-body and three-body mean motion resonances structure. We carry out N-body simulations, accounting for type-I migration, stellar tidal damping, disc eccentricity-damping, and featuring a migration barrier located at the disc's inner edge. Due to the sequential migration, planets naturally form a chain of first-order resonances. But to explain the period ratios of the b/c/d-system, which are presently in higher-order resonances, we find that planets b and c must have marched across the migration barrier, into the gas-free cavity, before the disc has dispersed. We investigate both an early and late cavity infall scenario and find that the early infall model best matches the constraints, as well as being more probable. After the dispersal of the gaseous disc, stellar tidal torque also contributes towards a modest separation of the inner system. We outline how the insights obtained in this work can be applied to aid the understanding of other compact resonant planet systems.
description: 18 pages, 14 figures; accepted for publication in MNRAS
Relations among $\mathbb{P}$-Twists
Creators: name: Hochenegger, Andreas
name: Krug, Andreas
Publisher: name: arXiv
Year: 2022
Subjects: subject: Algebraic Geometry (math.AG)
subject: Category Theory (math.CT)
subject: FOS: Mathematics

description: Given two $\mathbb{P}$-objects in some algebraic triangulated category, we investigate the possible relations among the associated $\mathbb{P}$-twists. The main result is that, under certain technical assumptions, the $\mathbb{P}$-twists commute if and only if the $\mathbb{P}$-objects are orthogonal. Otherwise, there are no relations at all. In particular, this applies to most of the known pairs of $\mathbb{P}$-objects on hyperkähler varieties. In order to show this, we relate $\mathbb{P}$-twists to spherical twists and apply known results about the absence of relations between pairs of spherical twists.
description: 21 pages. Closed gap in proof of Proposition 3.23 (see also Remark 3.24). Same content as published version
Particle simulations of a one dimensional plasma
Creators: name: Alfheim, Arne
Publisher: name: University of British Columbia
Year: 2010

description: A Particle In Cell (PIC) code has been developed that simulates a one dimensional plasma. The plasma model was electrostatic with fixed ions. The code was used to simulate Landau damping and the two stream instability. Results obtained showed good agreement with the theoretical behaviour for both phenomenon. Conservation of energy was also checked. The total energy was found to deviate only slightly so that energy conservation was achieved.
Semantic Web und LOD in der digitalen Archäologie Ein Blick in die Praxis
Creators: name: Thiery, Florian
Publisher: name: Zenodo
Year: 2021
Subjects: Semantic Web
Linked Open Data
Ogham
Samian Ware
Linked Open Data Cloud

description: Anwendungen und Technologien des Semantic Web wie Ontologien aber auch Linked Open Data (LOD) sind in den Digital Humanities oft sehr theoretischer bzw. akademischer Natur. Dieser Vortrag gibt einen Eindruck zur praktischen Anwendung von Werkzeugen des Semantic Web / LOD in der digitalen Archäologie. Anhand verschiedenster Projekte (Linked Open Samian Ware[1], Linked Ogham[2], SPARQLing Unicorn QGIS Plugin[3], re3dragon[4]) wird auf Datenmodellierung, -erfassung und -präsentation, verwendete Tools und Software, Challenges und „lessons learned“ eingegangen. [1] https://rgzm.github.io/samian-lod/
 [2] http://ogham.link/
 [3] https://plugins.qgis.org/plugins/sparqlunicorn/
 [4] https://github.com/RGZM/re3dragon
Stable crystalline lattices in two-dimensional binary mixtures of dipolar particles
Creators: name: Assoud, Lahcen
name: Messina, René
name: Löwen, Hartmut
Publisher: name: arXiv
Year: 2007
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The phase diagram of binary mixtures of particles interacting via a pair potential of parallel dipoles is computed at zero temperature as a function of composition and the ratio of their magnetic susceptibilities. Using lattice sums, a rich variety of different stable crystalline structures is identified including $A_mB_n$ structures. [$A$ $(B)$ particles correspond to large (small) dipolar moments.] Their elementary cells consist of triangular, square, rectangular or rhombic lattices of the $A$ particles with a basis comprising various structures of $A$ and $B$ particles. For small (dipolar) asymmetry there are intermediate $AB_2$ and $A_2B$ crystals besides the pure $A$ and $B$ triangular crystals. These structures are detectable in experiments on granular and colloidal matter.
description: 6 pages - 2 figs - phase diagram updated
Liroceras karaouii Korn & Klug 2023, sp. nov.
Creators: name: Korn, Dieter
name: Klug, Christian
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Mollusca
Cephalopoda
Nautilida
Liroceratidae
Liroceras
Liroceras karaouii

description: Liroceras karaouii sp. nov.
urn:lsid:zoobank.org:act: 2EDCD119-FDE9-426A-9547-A89E8AA520F4
Fig. 17; Table 7
Diagnosis
Species of Liroceras with thickly pachyconic, subinvolute conch (ww/dm ~0.75; uw/dm ~0.25), whorl profile moderately depressed (ww/wh ~ 1.65) with broadly rounded venter and subangular umbilical margin. Coiling rate very high (WER ~ 2.65), whorls very weakly embracing (IZR ~0.17). Suture line nearly straight.
Etymology
Named after Driss Karaoui (Hassilabied), the collector of the specimen.
Material examined
Holotype MOROCCO • Anti-Atlas, region south-west of Rissani; basal Mougoui Ayoun Formation; Karaoui Coll.; illustrated in Fig. 17; PIMUZ 39515.
Description
Holotype PIMUZ 39515 is a corroded, desert-polished specimen with a phragmocone diameter of about 46 mm (Fig. 17). It is fully septate and has about 22 chambers in the last volution. It is, at 46 mm in conch diameter, thickly pachyconic and subinvolute (ww/dm=0.77; uw/dm=0.25) with a strongly depressed, reniform whorl profile (ww/wh=1.65), a very small whorl overlap zone (IZR= 0.17) and a very high coiling rate (WER ~ 2.65). The whorl profile is crescent-shaped and widest at the subangular umbilical margin. The umbilical wall is flattened and slightly oblique. The suture line extends nearly linearly across the flanks and venter.
Remarks
Liroceras karaouii sp. nov. differs from L. vermis sp. nov. in the subangular umbilical margin and in the slightly wider umbilicus (uw/dm ~ 0.25 in L. karaouii but only uw/dm ~ 0.20 in L. vermis). This shape of the umbilicus is also the most important distinguishing character from the other species of the genus. The pronounced umbilical margin in L. karaouii can be seen as a plesiomorphic character, which transforms from the possible evolutionary lineage from Bistrialites to Liroceras.
description: Published as part of Korn, Dieter & Klug, Christian, 2023, Early Carboniferous coiled nautiloids from the Anti-Atlas (Morocco), pp. 156-194 in European Journal of Taxonomy 885 on pages 180-181, DOI: 10.5852/ejt.2023.885.2199, http://zenodo.org/record/8222417
The environmental changes and the genome intelligence.docx
Creators: name: Elsayed Hafez
Publisher: name: figshare
Year: 2021
Subjects: subject: 60303 Biological Adaptation
subject: FOS: Biological sciences

description: genome has all the information which enable the organisms to adapt with the environmental changes.Bacteria and fungi can resist the antibioticshuman become sensitive to a new developed substancesearth became narrowsky expanded
Note on the asymptotic structure of Kerr-Schild form
Creators: name: Mao, Pujian
name: Zhao, Weicheng
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The Kerr-Schild form provides a natural way of realizing the classical double copy that relates exact solutions in general relativity to exact solutions in gauge theory. In this paper, we examine the asymptotic structure of Kerr-Schild form. In Newman-Unti gauge, we find a generic solution space satisfying the Kerr-Schild form in series expansion around null infinity. The news function in the solution space is chiral and can not lead to a mass loss formula. A class of asymptotically flat complex pp-wave solutions in closed form is obtained from the solution space.
description: v2: refs added, interpretations about several issues improved v3: refs added, major revision, published in JHEP
Function theory on quotient domains related to the polydisc
Creators: name: Bhowmik, Mainak
name: Kumar, Poornendu
Publisher: name: arXiv
Year: 2022
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 32A17, 46J20, 32E30, 47A56, 58D19

description: Inner functions are the backbone of holomorphic function theory. This paper studies the inner functions on quotient domains of the open unit polydisc, $\bD^d$, arising from the group action of finite pseudo-reflection groups. Such quotient domains are known to be biholomorphic to the proper image $θ(\bD^d)$ of $\bD^d$ under certain polynomial maps $θ: \bD^d \to θ(\bD^d)$. The main contributions of this paper are as follows:
 1) We show that the closed algebra generated by inner functions on $θ(\bD^d)$ forms a proper subalgebra of $H^\infty(θ(\bD^d))$, the algebra of bounded holomorphic functions on $θ(\bD^d)$.
 2) The set of all rational inner functions on $θ(\bD^d)$ is shown to be dense in the norm-unit ball of $H^\infty(θ(\bD^d))$ with respect to the uniform compact-open topology, thereby proving the Carathéodory approximation result.
 3) As an application of the Carathéodory approximation theorem, we approximate holomorphic functions on $θ(\bD^d)$ that are continuous in the closure of ${θ(\bD^d)}$ by convex combinations of rational inner functions in the $L^2 $-norm, thereby obtaining a version of the Fisher's theorem.
 4) Given the two approximation results above, establishing a structure for rational inner functions is essential. We have identified the structure of rational inner functions on $θ(\mathbb{D}^d)$.
 5) The Carathéodory approximation for operator-valued functions is also discussed.
description: Thoroughly revised, this version includes a new section and a modified title. It has been accepted for publication in the Journal of Functional Analysis
Supplementary File S2-WinBUGS Code
Creators: name: Elsohaby, Ibrahim
Publisher: name: figshare
Year: 2021
Subjects: subject: 70203 Animal Management
subject: FOS: Animal and dairy science
subject: 70704 Veterinary Epidemiology
subject: FOS: Veterinary sciences
subject: 70703 Veterinary Diagnosis and Diagnostics

description: WinBUGS code
Molecular Cloning of Arsenate reductase and Phytochelatin synthase gene related to arsenic response in Oryza sativa L. var. indica cv. Khao Dawk Mali 105
Creators: name: Pawonrat Patipipat
name: Pattana Srifah Huehne
name: Kisana Bhinija
name: Bhawat Wongkhamprai
Publisher: name: Genetics Society of Thailand
Year: 2014
Subjects: Oryza sativa, Khao Dawk Mali 105, arsenic, arsenate reductase, phytochelatin synthase

description: 1, 7, Thai Journal of Genetics
Effective low energy Hamiltonians and unconventional Landau level spectrum of monolayer C$_3$N
Creators: name: Shahbazi, Mohsen
name: Davoodi, Jamal
name: Boochani, Arash
name: Khanjani, Hadi
name: Kormányos, Andor
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We derive a low-energy effective $\mathbf{k}\cdot\mathbf{p}$ Hamiltonians for monolayer C$_{3}$N at the $ Γ$ and $ M $ points of the Brillouin zone where the band edge in the conduction and valence band can be found. Our analysis of the electronic band symmetries helps to better understand several results of recent ab-initio calculations[1,2] for the optical properties of this material. We also calculate the Landau level spectrum. We find that the Landau level spectrum in the degenerate conduction bands at the $ Γ$ point acquires properties that are reminiscent of the corresponding results in bilayer graphene, but there are important differences as well. Moreover, because of the heavy effective mass, $n$-doped samples may host interesting electron-electron interaction effects.
description: 10 pages, 5 figures
Turkey's Agricultural Economy in Brief
Creators: name: Holm, Henrietta M.
name: Holm, Henrietta M.
Publisher: name: Unknown
Year: 1964
Subjects: Agricultural and Food Policy
Crop Production/Industries
Food Consumption/Nutrition/Food Safety
International Relations/Trade
Land Economics/Use
Livestock Production/Industries

description: Report Summary: The economy of the Republic of Turkey is predominantly agricultural. Although there is an increasing trend toward urbanization, less than a third of the population lives in towns and cities. While most of the country is ill-suited for agricultural pursuits, agriculture directly supports most of the people. About four-fifths of all Turkish exports, by value, are of farm commodities. But these are limited in variety. In a little more than 20 years, agricultural acreage has doubled--largely as a result of mechanization. Total production, however, has yet not gained in ratio comparable to the expansion of the agricultural area. Moreover, further expansion is difficult. Increased production in the future must come largely from more efficient, more intensive use of presently harvested and grazed land. Turkey's potential for agricultural improvement is hampered by enormous obstacles, not the least of which is cultural resistance in some areas to progressive change. Political conditions have been unsettled. Investment in agricultural development projects has continued, but in some instances has failed to produce the returns anticipated by economic planners. This is partly a result of adverse weather over a period of several years. Actual accomplishment of development goals is now heavily dependent on foreign aid.
A Soft X-ray Polarimeter Designed for Broad-band X-ray Telescopes
Creators: name: Marshall, Herman L.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: A novel approach for measuring linear X-ray polarization over a broad-band using conventional imaging optics and cameras is described. A new type of high efficiency grating, called the critical angle transmission grating is used to disperse soft X-rays radially from the telescope axis. A set of multilayer-coated paraboloids re-image the dispersed X-rays to rings in the focal plane. The intensity variation around these rings is measured to determine three Stokes parameters: I, Q, and U. By laterally grading the multilayer optics and matching the dispersion of the gratings, one may take advantage of high multilayer reflectivities and achieve modulation factors over 50% over the entire 0.2 to 0.8 keV band. A sample design is shown that could be used with the Constellation-X optics.
description: 11 pages, 7 figures, presented at conference 6688 of the SPIE
Modeling uncertainties of $t\bar{t}W^\pm$ multilepton signatures
Creators: name: Bevilacqua, G.
name: Bi, H. Y.
name: Cordero, F. Febres
name: Hartanto, H. B.
name: Kraus, M.
name: Nasufi, J.
name: Reina, L.
name: Worek, M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: In light of recent discrepancies between the modeling of $t\bar{t} W^\pm$ signatures and measurements reported by the Large Hadron Collider (LHC) experimental collaborations, we investigate in detail theoretical uncertainties for multi-lepton signatures. We compare results from the state-of-the-art full off-shell calculation and its Narrow Width Approximation to results obtained from the on-shell $t\bar{t} W^\pm$ calculation, with approximate spin-correlations in top-quark and $W$ decays, matched to parton showers. In the former case double-, single-, and non-resonant contributions together with interference effects are taken into account, while the latter two cases are only based on the double resonant top-quark contributions. The comparison is performed for the LHC at $\sqrt{s} = 13$ TeV for which we study separately the multi-lepton signatures as predicted from the dominant NLO contributions at the perturbative orders $\mathcal{O}(α_s^3α^6)$ and $\mathcal{O}(α_sα^8)$. Furthermore, we combine both contributions and propose a simple way to approximately incorporate the full off-shell effects in the NLO computation of on-shell $pp\to t\bar{t} W^\pm$ matched to parton showers.
description: 37 pages, 10 figures, 1 table, published version
R-process nucleosynthesis of low-mass neutron star explosions
Creators: name: Yip, Chun-Ming
name: Chu, Ming-Chung
name: Leung, Shing-Chi
name: Lin, Lap-Ming
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We show that a low-mass neutron star undergoes delayed explosion after mass removal from its surface. We couple the Newtonian hydrodynamics to a nuclear reaction network of $\sim 4500$ isotopes to study the nucleosynthesis and neutrino emission during the explosion. An electron anti-neutrino burst with a peak luminosity of $\sim 3\times10^{50}$ erg s$^{-1}$ is emitted while the ejecta is heated to $\sim 10^{9}$ K. A robust r-process nucleosynthesis is realized in the ejecta. Lanthanides and heavy elements near the second and third r-process peaks are synthesized as end products of nucleosynthesis, suggesting that low-mass neutron star explosions could be an important source of solar chemical elements.
description: 14 pages, 17 figures
Periodic orbits of linear endomorphisms on the 2-torus and its lattices
Creators: name: Baake, Michael
name: Roberts, John A. G.
name: Weiss, Alfred
Publisher: name: arXiv
Year: 2008
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 37E30, 05A15

description: Counting periodic orbits of endomorphisms on the 2-torus is considered, with special focus on the relation between global and local aspects and between the dynamical zeta function on the torus and its analogue on finite lattices. The situation on the lattices, up to local conjugacy, is completely determined by the determinant, the trace and a third invariant of the matrix defining the toral endomorphism.
description: 22 pages
Assessing Lexical Collocations in the Masnavi Manavi by Maulana
Creators: name: Pahlavannejad, Mohammadreza
name: Ebrahimi, Shima
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 470406
subject: Historical, comparative and typological linguistics
classificationCode: 470408
subject: Lexicography and semantics

description: In different languages, there is a sense relation between lexicons which makes syntagmatic and paradigmatic relations among linguistic structures. One of the sense relations is collocational relation which is based on a relevance and sequence of two or more vocabularies whose co-occurrence can be predicted. Lexical collocations are of considerable importance in any language and in close association with a community’s literature, attitudes and customs. Any poet’s innovative and unique use of lexical collocations in syntagmatic axis makes his work semantically relevant, graceful, and different from other poets’ works. Due to the fact that one of the most significant characteristics of Maulana Jalalu-D-Din Muhammad I Balkhi’s poems, the present study seeks to investigate and categorize the existing collocations in his Masnavi Manavi according to semantic and corresponding collocations, synonymous collocations, antonymous collocations, situational collocations, historical and Quranic collocations
Measurement of spin asymmetry parameters in the [reaction proton + proton --> proton + neutron + positive pion using a polarized hydrogen target and a polarized proton beam]
Creators: name: Shypit, Rickey Lee
Publisher: name: University of British Columbia
Year: 2010

description: Measurements have been made of the spin asymmetry parameters A[sub NN], A[sub LL], A[sub SS], A[sub SL], A[sub NO] and A[sub ON] in the inelastic reaction pp → pn π⁺ at incident beam energies of 510, 465 and 420 MeV. The measurement of A[sub NN] is described specifically. This experiment has reported the first results of a spin asymmetry measurement with a polarized beam and polarized target in a reaction having a three particle final state. Neutrons were detected in an array of position sensitive scintillation counters while the two charged particles were detected in an array of multi-wire proportional chambers. Time of flight was recorded for the neutron. Events were kinematically reconstructed in the analysis program in which free and quasi-free scattering events were separated by a X² test to the kinematical fit. The unpolarized background from non-hydrogenous material in the target was estimated from unpolarized data obtained with the target material replaced by teflon. Results are presented as asymmetries binned against single kinematic variables. The statistical precision is 10% on the best data. The data are sufficiently complete to identify the dominant partial wave amplitudes. A comparison is made with calculations based on a one-pion-exchange Δ dominance model. Discrepancies from the model are attributed the neglect of the TTN S₃₁ interaction in the calculations.
Revisiting timelike geodesics in the Fisher-Janis-Newman-Winicour-Wyman spacetime
Creators: name: Ota, Keisuke
name: Kobayashi, Shinpei
name: Nakashi, Keisuke
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: FOS: Physical sciences

description: We investigate the timelike geodesics and the periapsis precession of orbits in the Fisher-Janis-Newman-Winicour-Wyman spacetime. This spacetime represents the naked singularity spacetime in the Einstein-massless scalar system. We revisit the results in the previous studies and relax the assumptions about the eccentricity of a bound orbit and the size of a semilatus. We find that the negative periapsis precession occurs when the spacetime sufficiently deviates from the Schwarzschild spacetime. In particular, for the small eccentric orbits, we show the negative periapsis precession occurs for $γ< 1/2$, where $γ$ is the deviation parameter from the Schwarzschild spacetime. We also obtain the analytical solutions for the special cases of $γ=0,1/2,1/4$. Then, we show that the negative precession never occurs for $γ=1/2$.
description: 26 pages, 7 figures
$\texttt{matryoshka}$: Halo Model Emulator for the Galaxy Power Spectrum
Creators: name: Donald-McCann, Jamie
name: Beutler, Florian
name: Koyama, Kazuya
name: Karamanis, Minas
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present $\texttt{matryoshka}$, a suite of neural network based emulators and accompanying Python package that have been developed with the goal of producing fast and accurate predictions of the nonlinear galaxy power spectrum. The suite of emulators consists of four linear component emulators, from which fast linear predictions of the power spectrum can be made, allowing all nonlinearities to be included in predictions from a nonlinear boost component emulator. The linear component emulators includes an emulator for the matter transfer function that produces predictions in $\sim 0.0004 \ \mathrm{s}$, with an error of $<0.08\%$ (at $1σ$ level) on scales $10^{-4} \ h \ \mathrm{Mpc}^{-1}
description: 18 pages, 15 figures, 3 tables, MNRAS accepted 23/01/22. Code available at https://github.com/JDonaldM/Matryoshka
New Low-Mass Stars and Brown Dwarfs with Disks in the Chamaeleon I Star-Forming Region
Creators: name: Luhman, K. L.
name: Muench, A. A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have used images obtained with the Infrared Array Camera and the Multiband Imaging Photometer onboard the Spitzer Space Telescope to search for low-mass stars and brown dwarfs with circumstellar disks in the Chamaeleon I star-forming region. Through optical spectroscopy of sources with red colors in these data, we have identified seven new disk-bearing members of the cluster. Three of these objects are probably brown dwarfs according to their spectral types (M8, M8.5, M8-L0). Three of the other new members may have edge-on disks based on the shapes of their infrared spectral energy distributions. One of the possible edge-on systems has a steeply rising slope from 4.5 to 24um, indicating that it could be a class I source (star+disk+envelope) rather than a class II source (star+disk). If so, then it would be one of the least massive known class I protostars (M5.75, M~0.1 Msun).
description: Astrophysical Journal, in press
A finite element method for simulating soft active non-shearable rods immersed in generalized Newtonian fluids
Creators: name: Ausas, Roberto F.
name: Gebhardt, Cristian G.
name: Buscaglia, Gustavo C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: We propose a finite element method for simulating one-dimensional solid models moving and experiencing large deformations while immersed in generalized Newtonian fluids. The method is oriented towards applications involving microscopic devices or organisms in the soft-bio-matter realm. By considering that the strain energy of the solid may explicitly depend on time, we incorporate a mechanism for active response. The solids are modeled as Cosserat rods, a detailed formulation being provided for the special case of a planar non-shearable rod. The discretization adopts one-dimensional Hermite elements for the rod and low-order Lagrange two-dimensional elements for the fluid's velocity and pressure. The fluid mesh is boundary-fitted, with remeshing at each time step. Several time marching schemes are studied, of which a semi-implicit scheme emerges as most effective. The method is demonstrated in very challenging examples: the roll-up of a rod to circular shape and later sudden release, the interaction of a soft rod with a fluid jet and the active self-locomotion of a sperm-like rod. The article includes a detailed description of a code that implements the method in the Firedrake library.
Carrier-carrier entanglement and transport resonances in semiconductor quantum dots
Creators: name: Buscemi, Fabrizio
name: Bordone, Paolo
name: Bertoni, Andrea
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study theoretically the entanglement created in a scattering between an electron, incoming from a source lead, and another electron bound in the ground state of a quantum dot, connected to two leads. We analyze the role played by the different kinds of resonances in the transmission spectra and by the number of scattering channels, into the amount of quantum correlations between the two identical carriers. It is shown that the entanglement between their energy states is not sensitive to the presence of Breit-Wigner resonances, while it presents a peculiar behavior in correspondence of Fano peaks: two close maxima separated by a minimum, for a two-channel scattering, a single maximum for a multi-channel scattering. Such a behavior is ascribed to the different mechanisms characterizing the two types of resonances. Our results suggest that the production and detection of entanglement in quantum dot structures may be controlled by the manipulation of Fano resonances through external fields.
description: 8 pages, 6 figures, RevTex4 two-column format, submitted
Ephippioceras pygops Korn & Klug 2023, sp. nov.
Creators: name: Korn, Dieter
name: Klug, Christian
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Mollusca
Cephalopoda
Nautilida
Ephippioceratidae
Ephippioceras
Ephippioceras pygops

description: Ephippioceras pygops sp. nov.
urn:lsid:zoobank.org:act: 498203A9-1F48-441C-B413-35C683103AE1
Fig. 18; Table 8
Diagnosis
Species of Ephippioceras with thickly pachyconic, subinvolute conch, whorl profile moderately depressed (ww/wh ~1.60) with broadly rounded venter and rounded umbilical margin. Impressed zone deep (IZR ~ 0.37). Suture line with high, subangular ventral saddle.
Etymology
Named after the brachiopod genus Pygope, because of the shape of the septal surface.
Material examined
Holotype MOROCCO • Anti-Atlas, east of Gara el Itima, 36 km east-northeast of Taouz; uppermost Zrigat Formation; Ebbighausen & Korn 2004 Coll.; illustrated in Fig. 18; MB.C.31292.
Description
Specimen MB.C.31292 (Fig. 18A) is a fragment of a specimen with a phragmocone diameter of about 80 mm. The whorl profile is crescent-shaped with a broadly rounded venter that continues onto the flanks, a rounded umbilical margin and a convex umbilical wall. The whorl section is moderately depressed (ww/wh=1.60) and the whorl embraces the preceding one to a rather high degree (IZR =0.37). The septal surface shows the striking bilobate shape with a median ridge that separates the septum in two concave bulges. The suture line forms a narrow, subangular saddle on the venter, a wide, broadly rounded lobe on the flank and another smaller lobe on the umbilical wall (Fig. 18C).
Remarks
Ephippioceras pygops sp. nov. has a far less depressed whorl profile when compared with the other species of the genus. While the ww/wh ratio is only 1.60 in E. pygops, it is close to a value of 2.00 or even higher in E. clitellarium and E. sphaericum (Shimansky 1967). In E. bilobatum, E. ferratum and E. verneuili, the whorl overlap is much lower (IZR ~ 0.20) than in E. pygops (IZR ~0.37). Ephippioceras spirale is difficult to compare because of the small size (19 mm dm) of the only one specimen.
description: Published as part of Korn, Dieter & Klug, Christian, 2023, Early Carboniferous coiled nautiloids from the Anti-Atlas (Morocco), pp. 156-194 in European Journal of Taxonomy 885 on pages 182-183, DOI: 10.5852/ejt.2023.885.2199, http://zenodo.org/record/8222417
Pseudoscalar bosonic excitations in the color-flavor locked phase at moderate densities
Creators: name: Kleinhaus, Verena
name: Buballa, Michael
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The properties of pseudoscalar bosonic excitations in the color-flavor locked phase at moderate densities are studied within a model of the Nambu--Jona-Lasinio type. Our previous analysis is extended to Goldstone bosons with hidden flavor and to higher-lying modes which stay massive in the chiral limit. The bosons are constructed explicitly by solving the Bethe-Salpeter equation for quark-quark scattering in random phase approximation. The masses and weak decay constants of the Goldstone bosons are found in good agreement with predictions from the low-energy effective theory. In the non-Goldstone sector we find an SU(3) octet which is weakly bound, while the singlet appears to be unbound.
description: 8 pages, 8 figures
Reconstruction of photon number conditioned states using phase randomized homodyne measurements
Creators: name: Chrzanowski, H. M.
name: Assad, S. M.
name: Bernu, Julien
name: Hage, Boris
name: Lund, A. P.
name: Ralph, T. C.
name: Lam, P. K.
name: Symul, T.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We experimentally demonstrate the reconstruction of a photon number conditioned state without using a photon number discriminating detector. By using only phase randomized homodyne measurements, we reconstruct up to the three photon subtracted squeezed vacuum state. The reconstructed Wigner functions of these states show regions of pronounced negativity, signifying the non-classical nature of the reconstructed states. The techniques presented allow for complete characterization of the role of a conditional measurement on an ensemble of states, and might prove useful in systems where photon counting still proves technically challenging.
Il bunker urbano Tipologia, simbologia, riuso dei bunker in Germania
Creators: name: Calandra Di Roccolino, Giacomo
Publisher: name: La Rivista di Engramma
Year: 2021
Subjects: Urban bunker
Reuse
Friedrich Tamms

description: The bunker is one of the most important typological inventions of the 20th century. The difference in Germany between Hochbunker and Tiefbunker has to do not only with the type (external or underground bunkers) but also with the location in space. It is no coincidence that most Tiefbunker are located outside cities, often camouflaged in the landscape, while Hochbunker are characteristic elements of urban structure. The urban Luftschutzbunker are certainly among the most interesting buildings from an architectural point of view, and among them the Flacktürme, built between 1940 and 1943 in the three main "Führer's cities" (Berlin, Hamburg and Vienna), offer the most food for thought: they were designed and built thanks to the work of the German architect Friedrich Tamms at the direct wish of Hitler. In addition to their form, which on one hand is based on Renaissance fortresses and on the other is derived from Gilly and Schinkel, their urban function is important, as observation points but also as dominant elements within the urban landscape. Their symbolic value in cities as impregnable fortresses and places of protection and defense during the war changed in the post-war period and bunkers became bulky presences and symbols to be erased, entering fully into the debate on the reconstruction of cities. Today, these reinforced concrete architectures have once again become sought-after ‘containers’ and cultural incubators in German and European cities. The theme of reusing urban bunkers has seen many projects and realizations in the last 30 years. We have gone from the temporary use and appropriation of these spaces by the artistic avant-garde, to the transformation of these places into actual museums and places of culture.
Buckling and force propagation along intracellular microtubules
Creators: name: Das, Moumita
name: Levine, Alex J.
name: MacKintosh, F. C.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Motivated by recent experiments showing the buckling of microtubules in cells, we study theoretically the mechanical response of, and force propagation along elastic filaments embedded in a non-linear elastic medium. We find that, although embedded microtubules still buckle when their compressive load exceeds the critical value $f_c$ found earlier, the resulting deformation is restricted to a penetration depth that depends on both the non-linear material properties of the surrounding cytoskeleton, as well as the direct coupling of the microtubule to the cytoskeleton. The deformation amplitude depends on the applied load $f$ as $(f- f_c)^{1/2}$. This work shows how the range of compressive force transmission by microtubules can be as large as tens of microns and is governed by the mechanical coupling to the surrounding cytoskeleton.
description: 5 pages, 5 figures
Majorana Braiding Racetracks from Charge Chern Insulator - Superconductor Hybrids
Creators: name: Wang, Jun-Ang
name: Zhou, Sen
name: Kotetes, Panagiotis
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Recent experiments have provided evidence for chiral charge order in Kagome superconductors (SCs). This intriguing possibility motivates us to unveil the first pathway to engineer topological superconductivity by harnessing the interplay of charge Chern insulators (CIs) and conventional SCs. We here identify under which conditions a pyramidal SC/CI/SC heterostructure induces an effective 1D spinless p-wave SC that allows pinning Majorana zero modes (MZMs) at termination edges and domain walls. As we reveal, such a MZM track is controlled by the phase difference of the two SCs involved and additional magnetic fields which are required for generating Rashba-like spin-orbit coupling. Further, we show that a SC/CI/SC/CI/SC double-pyramidal hybrid defines a double MZM track, in which braiding occurs by varying the two superconducting phase differences in space and adiabatically in time. Given the geometry of the MZM racetrack, we propose to employ the time-averaged quadrupolar differential conductance to confirm the here-termed MZM track exchange process which is pivotal for braiding. In addition, we identify experimental knobs which enable the fusion of MZM pairs, and the detection of the underlying non-Abelian topological order and twofold many-body ground state degeneracy by encoding it in a topological invariant.
description: 19 pages, 8 Figures, 2 Tables, 4 Appendices; Expanded, improved and reorganized text; Version close to the one that will appear in PRB
Dispersive optomechanics: a membrane inside a cavity
Creators: name: Jayich, A. M.
name: Sankey, J. C.
name: Zwickl, B. M.
name: Yang, C.
name: Thompson, J. D.
name: Girvin, S. M.
name: Clerk, A. A.
name: Marquardt, F.
name: Harris, J. G. E.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present the results of theoretical and experimental studies of dispersively coupled (or "membrane in the middle") optomechanical systems. We calculate the linear optical properties of a high finesse cavity containing a thin dielectric membrane. We focus on the cavity's transmission, reflection, and finesse as a function of the membrane's position along the cavity axis and as a function of its optical loss. We compare these calculations with measurements and find excellent agreement in cavities with empty-cavity finesses in the range 10^4 to 10^5. The imaginary part of the membrane's index of refraction is found to be approximately 10^(-4). We calculate the laser cooling performance of this system, with a particular focus on the less-intuitive regime in which photons "tunnel" through the membrane on a time scale comparable to the membrane's period of oscillation. Lastly, we present calculations of quantum non-demolition measurements of the membrane's phonon number in the low signal-to-noise regime where the phonon lifetime is comparable to the QND readout time.