cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Les protestations bulgares en 2013 : la guerre des récits.
Creators: name: Znepolski, Boyan
Publisher: name: Politika.io
Year: 2019

description: Prenant la Bulgarie pour cas d’étude, ce chapitre se propose d’analyser l’impact social et politique des nouveaux mouvements de la place publique, en s’intéressant non seulement à leur contestation du pouvoir et de la classe politique, considérés comme aliénés et non-représentatifs, mais aussi à la tentative, régulièrement affirmée, de reconstruire une communauté de citoyens par delà les clivages politiques, sociaux et culturels préétablis. Le chapitre a d’abord pour objectif de démontrer l’originalité des protestations civiques de l’été 2013, lesquelles ne se déployaient plus sur un mode idéologique ou identitaire mais sur un mode moralo-esthétique, en faisant largement usage de formes artistiques d’expression. Il essaie ensuite d’expliciter les enjeux principaux des débats publics auxquels ces protestations ont donné lieu en Bulgarie, en montrant qu’ils ont pris la forme d’une « guerre des métaphores » opposant différentes visions de la signification des protestations. Finalement, il dévoile, dans les récents mouvements de la place publique et les débats qui les ont accompagnés, le resurgissement d’anciens conflits politiques et idéologiques qui remontent à la période du régime communiste et aux premières années de l’époque postcommuniste.
Arbitrary Bending Plasmonic Light Waves
Creators: name: Epstein, Itai
name: Arie, Ady
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We demonstrate the generation of self-accelerating surface plasmon beams along arbitrary caustic curvatures. These plasmonic beams are excited by free-space beams through a two-dimensional binary plasmonic phase mask, which provides the missing momentum between the two beams in the direction of propagation, and sets the required phase for the plasmonic beam in the transverse direction. We examine the cases of paraxial and non-paraxial curvatures and show that this highly versatile scheme can be designed to produce arbitrary plasmonic self-accelerating beams. Several different plasmonic beams, which accelerate along polynomial and exponential trajectories, are demonstrated both numerically and experimentally, with a direct measurement of the plasmonic light intensity using a near-field-scanning-optical-microscope.
description: 5 pages, 6 figures
The Universal Stellar Mass-Stellar Metallicity Relation for Dwarf Galaxies
Creators: name: Kirby, Evan N.
name: Cohen, Judith G.
name: Guhathakurta, Puragra
name: Cheng, Lucy
name: Bullock, James S.
name: Gallazzi, Anna
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present spectroscopic metallicities of individual stars in seven gas-rich dwarf irregular galaxies (dIrrs), and we show that dIrrs obey the same mass-metallicity relation as the dwarf spheroidal (dSph) satellites of both the Milky Way and M31: Z_* ~ M_*^(0.30 +/- 0.02). The uniformity of the relation is in contradiction to previous estimates of metallicity based on photometry. This relationship is roughly continuous with the stellar mass-stellar metallicity relation for galaxies as massive as M_* = 10^12 M_sun. Although the average metallicities of dwarf galaxies depend only on stellar mass, the shapes of their metallicity distributions depend on galaxy type. The metallicity distributions of dIrrs resemble simple, leaky box chemical evolution models, whereas dSphs require an additional parameter, such as gas accretion, to explain the shapes of their metallicity distributions. Furthermore, the metallicity distributions of the more luminous dSphs have sharp, metal-rich cut-offs that are consistent with the sudden truncation of star formation due to ram pressure stripping.
description: 24 pages, 13 figures, 1 machine-readable table included in "Other formats," accepted to ApJ. Minor typographical corrections in v.2
Parameter Estimates for a Polymer Electrolyte Membrane Fuel Cell Cathode
Creators: name: Guo, Qingzhi
name: Sethuraman, Vijay A.
name: White, Ralph E.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Five parameters of a model of a polymer electrolyte membrane fuel cell cathode (the porosity of the gas diffusion layer, the porosity of the catalyst layer, the exchange current density of the oxygen reduction reaction, the effective ionic conductivity of the electrolyte, and the ratio of the effective diffusion coefficient of oxygen in a flooded spherical agglomerate particle to the squared particle radius) were determined by the least square fitting of experimental polarization curves. The values of parameters obtained in this work indicate that ionic conduction and gas-phase transport are two processes significantly influencing the performance of PEMFC air cathodes. While ionic conduction influences cathode performance over a wide range of current densities, gas-phase transport influences cathode performance only at high current densities.
description: 47 pages, 8 figures
Search for inelastic WIMP nucleus scattering on $^{129}$Xe in data from the XMASS-I experiment
Creators: name: Uchida, H.
name: Abe, K.
name: Hieda, K.
name: Hiraide, K.
name: Hirano, S.
name: Ichimura, K.
name: Kishimoto, Y.
name: Kobayashi, K.
name: Moriyama, S.
name: Nakagawa, K.
name: Nakahata, M.
name: Ogawa, H.
name: Oka, N.
name: Sekiya, H.
name: Shinozaki, A.
name: Suzuki, Y.
name: Takeda, A.
name: Takachio, O.
name: Umemoto, D.
name: Yamashita, M.
name: Yang, B. S.
name: Tasaka, S.
name: Liu, J.
name: Martens, K.
name: Hosokawa, K.
name: Miuchi, K.
name: Murata, A.
name: Onishi, Y.
name: Otsuka, Y.
name: Takeuchi, Y.
name: Kim, Y. H.
name: Lee, K. B.
name: Lee, M. K.
name: Lee, J. S.
name: Fukuda, Y.
name: Itow, Y.
name: Masuda, K.
name: Nishitani, Y.
name: Takiya, H.
name: Kim, N. Y.
name: Kim, Y. D.
name: Kusaba, F.
name: Nishijima, K.
name: Fujii, K.
name: Murayama, I.
name: Nakamura, S.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Experiment (nucl-ex)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: A search for inelastic scattering of Weakly Interacting Massive Particles (WIMPs) on the isotope $^{129}$Xe was done in data taken with the single phase liquid xenon detector XMASS at the Kamioka Observatory. Using a restricted volume containing 41 kg of LXe at the very center of our detector we observed no significant excess of events in 165.9 days of data. Our background reduction allowed us to derive our limits without explicitly subtracting the remaining events which are compatible with background expectations and derive for e.g. a 50 GeV WIMP an upper limit for its inelastic cross section on $^{129}$Xe nuclei of 3.2 pb at the 90% confidence level.
description: 13 pages, 7 figures, to be published in PTEP
Eretmocerus pallidus Dozier
Creators: name: Delvare, Gérard
name: Genson, Gwenaelle
name: Borowiec, Nicolas
name: Étienne, Jean
name: Karimé, Anli- Liochouroutu Abdoul
name: Beaudoin-Ollivier, Laurence
Publisher: name: Zenodo
Year: 2008
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Aphelinidae
Eretmocerus
Eretmocerus pallidus

description: Eretmocerus pallidus Dozier
(Figs 24–26)
 Eretmocerus pallidus Dozier, 1932: 115 –117. Type locality: HAITI: Damien. Host: Aleurothrixus floccosus.
 Material examined (in USNM). Type material. – Lectotype Ψ (here designated, see Fig. 23 for placement on slide). Labelled: Eretmocerus pallidus Dozier /reared from Tetraleurodes minutissima Dozier on Annona squamosa /Port-au-Prince, Haiti / April 11, 1931 /H.L. Dozier. Paralectotypes. 3 ΨΨ (on the same slide) and 4 ΨΨ on another slide.
 Diagnosis. Mostly the antennae and appendices are visible as the specimens were slide-mounted without clearing. Radicula 0.37–0.42 times as long as the scape. Scape 3.20–4.60 times as long as wide. Pedicel (1.8) 2.0–2.1 (2.5) times as long as wide and 0.40–0.54 times as long as scape. F1 subtriangular with ventral length much longer than dorsal one. Clava 5.0–6.5 (7.25) times as long as wide, 1.75–1.85 times as long as scape and 3.25–3.90 (4.70) times as long as pedicel. Mid lobe of mesoscutum with 3 pairs of setae. Scutellum with 2 pairs of setae and a pair of placoid sensilla. Forewing 2.8–3.2 times as long as wide. Posterior fringe maximal length 0.40–0.50 times as width of wing. Marginal vein 0.45–0.55 times as long as costal cell. Stigmal vein 0.31–0.41 (0.55) times as long as marginal vein when measured as Graham (1969) or 0.48–0.62 times so when measured as Rose and Zolnerowich (1997). Costal cell with 1–2 apical dorsal hairs. Submarginal and marginal veins bearing each 3 dorsal setae. Fore wing disc bearing 4–6 hairs basad of linea calva, mostly on 1 row. 8–10 microtrichiae visible below linea calva. Length of apical spur of mid tibia 0.48–0.62 times as long as relevant basitarsus. Ovipositor 1.04–1.16 times as long as mid tibia.
This species can be recognized by its unusual small size (0.6 mm), relative proportion of antennal segments, presence of 3 pairs of setae on mid lobe of mesoscutum, relatively narrow fore wing, long marginal fringe, presence of 3 dorsal setae on submarginal vein and ovipositor, slightly longer than mid tibia.
description: Published as part of Delvare, Gérard, Genson, Gwenaelle, Borowiec, Nicolas, Étienne, Jean, Karimé, Anli- Liochouroutu Abdoul & Beaudoin-Ollivier, Laurence, 2008, Description of Eretmocerus cocois sp. n. (Hymenoptera: Chalcidoidea), a parasitoid of Aleurotrachelus atratus (Hemiptera: Aleyrodidae) on the coconut palm, pp. 47-62 in Zootaxa 1723 on page 56, DOI: 10.5281/zenodo.181137
Generation of effective massive Spin-2 fields through spontaneous symmetry breaking of scalar field
Creators: name: Mandal, Susobhan
name: Shankaranarayanan, S.
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: General relativity and quantum field theory are the cornerstones of our understanding of physical processes, from subatomic to cosmic scales. While both theories work remarkably well in their tested domains, they show minimal overlap. However, our research challenges this separation by revealing that non-perturbative effects bridge these distinct domains. We introduce a novel mechanism wherein, at linear order, spin-2 fields around an arbitrary background acquire \emph{effective mass} due to the spontaneous symmetry breaking (SSB) of either global or local symmetry of complex scalar field minimally coupled to gravity. The action of the spin-2 field is identical to the extended Fierz-Pauli (FP) action, corresponding to the mass deformation parameter $α= 1/2$. We show that this occurs due to the effect of SSB on the variation of the energy-momentum tensor of the matter field, which has a dominant effect during SSB. The extended FP action has a salient feature, compared to the standard FP action: the action has 6 degrees of freedom with no ghosts. For local $U(1)$ SSB, we establish that the effective mass of spin-2 fields is related to the mass of the gauge boson and the electric charge of the complex scalar field. Interestingly, our results indicate that the millicharged dark matter scalar fields, generating dark photons, can produce a mass of spin-2 fields of the same order as the Hubble constant $(H_0)$. Hence, we argue that the dark sector offers a natural explanation for the acceleration of the current Universe.
description: 47 pages, 1 appendix added, added references, version accepted in General Relativity and Gravitation, results are unchanged
A revised uncertainty budget for measuring the Boltzmann constant using the Doppler Broadening Technique on ammonia
Creators: name: Lemarchand, Cyril
name: Mejri, Sinda
name: Sow, Papa Lat Tabara
name: Triki, Meriam
name: Tokunaga, Sean K.
name: Briaudeau, Stephan
name: Chardonnet, Christian
name: Darquié, Benoît
name: Daussy, Christophe
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We report on our on-going effort to measure the Boltzmann constant, kB, using the Doppler Broadening Technique. The main systematic effects affecting the measurement are discussed. A revised error budget is presented in which the global uncertainty on systematic effects is reduced to 2.3 ppm. This corresponds to a reduction of more than one order of magnitude compared to our previous Boltzmann constant measurement. Means to reach a determination of kB at the part per million accuracy level are outlined.
Structure of longitudinal chromomagnetic fields in high energy collisions
Creators: name: Dumitru, A.
name: Lappi, T.
name: Nara, Y.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We compute expectation values of spatial Wilson loops in the forward light cone of high-energy collisions. We consider ensembles of gauge field configurations generated from a classical Gaussian effective action as well as solutions of high-energy renormalization group evolution with fixed and running coupling. The initial fields correspond to a color field condensate exhibiting domain-like structure over distance scales of order the saturation scale. At later times universal scaling emerges at large distances for all ensembles, with a nontrivial critical exponent. Finally, we compare the results for the Wilson loop to the two-point correlator of magnetic fields.
description: RevTeX, 7 pages, 8 figures. V2: minor clarifications in text, Fig 6 revised
Electron-Phonon Coupling in Two-Dimensional Silicene and Germanene
Creators: name: Yan, Jia-An
name: Stein, Ryan
name: Schaefer, David M.
name: Wang, Xiao-Qian
name: Chou, M. Y.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Following the work in graphene, we report a first-principles study of electron-phonon coupling (EPC) in low-buckled (LB) monolayer silicene and germanene. Despite of the similar honeycomb atomic arrangement and linear band dispersion, the EPC matrix-element squares of the $Γ$-$E_g$ and K-$A_1$ modes in silicene are only about 50% of those in graphene. However, the smaller Fermi velocity in silicene compensates this reduction by providing a larger joint electronic density of states near the Dirac point. We predict that Kohn anomalies associated with these two optical modes are significant in silicene. In addition, the EPC-induced frequency shift and linewidth of the Raman-active $Γ$-$E_g$ mode in silicene are calculated as a function of doping. The results are comparable to those in graphene, indicating a similar non-adiabatic dynamical origin. In contrast, the EPC in germanene is found to be much reduced.
description: 5 pages, 4 figures
Managing O-RAN Networks: xApp Development from Zero to Hero
Creators: name: Santos, Joao F.
name: Huff, Alexandre
name: Campos, Daniel
name: Cardoso, Kleber V.
name: Both, Cristiano B.
name: DaSilva, Luiz A.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: Systems and Control (eess.SY)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: The Open Radio Access Network (O-RAN) Alliance proposes an open architecture that disaggregates the RAN and supports executing custom control logic in near-real time from third-party applications, the xApps. Despite O-RAN's efforts, the creation of xApps remains a complex and time-consuming endeavor, aggravated by the sometimes fragmented, outdated, or deprecated documentation from the O-RAN Software Community (OSC). These challenges hinder academia and industry from developing and validating solutions and algorithms on O-RAN networks. This tutorial addresses this gap by providing the first comprehensive guide for developing xApps to manage the O-RAN ecosystem from theory to practice. We provide a thorough theoretical foundation of the O-RAN architecture and detail the functionality offered by Near Real-Time RAN Intelligent Controller (Near-RT RIC) components. We examine the xApp design and configuration. We explore the xApp lifecycle and demonstrate how to deploy and manage xApps on a Near-RT RIC. We address the xApps' interfaces and capabilities, accompanied by practical examples. We provide comprehensive details on how xApps can control the RAN. We discuss debugging strategies and good practices to aid the xApp developers in testing their xApps. Finally, we review the current landscape and open challenges for creating xApps.
Analysis of Farthest Point Sampling for Approximating Geodesics in a Graph
Creators: name: Kamousi, Pegah
name: Lazard, Sylvain
name: Maheshwari, Anil
name: Wuhrer, Stefanie
Publisher: name: arXiv
Year: 2013
Subjects: subject: Computational Geometry (cs.CG)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Graphics (cs.GR)
subject: FOS: Computer and information sciences

description: A standard way to approximate the distance between any two vertices $p$ and $q$ on a mesh is to compute, in the associated graph, a shortest path from $p$ to $q$ that goes through one of $k$ sources, which are well-chosen vertices. Precomputing the distance between each of the $k$ sources to all vertices of the graph yields an efficient computation of approximate distances between any two vertices. One standard method for choosing $k$ sources, which has been used extensively and successfully for isometry-invariant surface processing, is the so-called Farthest Point Sampling (FPS), which starts with a random vertex as the first source, and iteratively selects the farthest vertex from the already selected sources. In this paper, we analyze the stretch factor $\mathcal{F}_{FPS}$ of approximate geodesics computed using FPS, which is the maximum, over all pairs of distinct vertices, of their approximated distance over their geodesic distance in the graph. We show that $\mathcal{F}_{FPS}$ can be bounded in terms of the minimal value $\mathcal{F}^*$ of the stretch factor obtained using an optimal placement of $k$ sources as $\mathcal{F}_{FPS}\leq 2 r_e^2 \mathcal{F}^*+ 2 r_e^2 + 8 r_e + 1$, where $r_e$ is the ratio of the lengths of the longest and the shortest edges of the graph. This provides some evidence explaining why farthest point sampling has been used successfully for isometry-invariant shape processing. Furthermore, we show that it is NP-complete to find $k$ sources that minimize the stretch factor.
description: 13 pages, 4 figures
Little Red Dots: Rapidly Growing Black Holes Reddened by Extended Dusty Flows
Creators: name: Li, Zhengrong
name: Inayoshi, Kohei
name: Chen, Kejian
name: Ichikawa, Kohei
name: Ho, Luis C.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The James Webb Space Telescope (JWST) observations have revolutionized extragalactic research, particularly with the discovery of little red dots (LRD), which we propose are dust-reddened broad-line active galactic nuclei (AGNs). Their unique v-shape spectral feature observed through JWST/NIRCam challenges us to discern the relative contributions of the galaxy and AGN. We study a spectral energy distribution (SED) model for LRDs from rest-frame UV to infrared bands. We hypothesize that the incident radiation from an AGN, characterized by a typical SED, is embedded in an extended dusty medium with an extinction law similar to those seen in dense regions such as Orion Nebula or certain AGN environments. The UV-optical spectrum is described by dust-attenuated AGN emission, featuring a red optical continuum at $λ>4000$ A and a flat UV spectral shape established through a gray extinction curve at $λ<3000$ A, due to the absence of small-size grains. There is no need for additional stellar emission or AGN scattered light. In the infrared, the SED is shaped by an extended dust and gas distribution ($γ<1$; $ρ\propto r^{-γ}$) with a characteristic gas density of $\simeq 10-10^3~{\rm cm}^{-3}$, which allows relatively cool dust temperatures to dominate the radiation, thereby shifting the energy peak from near- to mid-infrared bands. This model, unlike the typical AGN hot torus models, can produce an infrared SED flattening that is consistent with LRD observations through JWST MIRI. Such a density structure can arise from the coexistence of inflows and outflows during the early assembly of galactic nuclei. This might be the reason why LRDs emerge preferentially in the high-redshift universe younger than one billion years.
description: 16 pages, 7 figures; accepted to ApJ
Eretmocerus desantisi Rose
Creators: name: Delvare, Gérard
name: Genson, Gwenaelle
name: Borowiec, Nicolas
name: Étienne, Jean
name: Karimé, Anli- Liochouroutu Abdoul
name: Beaudoin-Ollivier, Laurence
Publisher: name: Zenodo
Year: 2008
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Aphelinidae
Eretmocerus
Eretmocerus desantisi

description: Eretmocerus desantisi Rose
 Eretmocerus desantisi Rose, 2000: 10, 18–20, figs 15–16. Type locality. PARAGUAY: Asunción. Host: Aleurothrixus floccosus.
 Material examined (in CIRAD). 4 ΨΨ (slide-mounted) GUADELOUPE: Petit-Canal, Parc Paysager, 03.vi.2006 and 20.x.2006, ex Aleurotrachelus atratus on Cocos nucifera (J. Etienne) [Ref. Etienne GP 2411 and GP 2449, CIRAD 19216 and 19307]. MARTINIQUE: Corps-de-Garde, 5 ΨΨ (3 ΨΨ slide-mounted), 14.i.2006, same host and associate plant (A. Triboire) [Ref. CIRAD 19033] (in CIRAD). LA RÉUNION: Grande Anse, 1 Ψ (slide-mounted), same host and associate plant, 14.i.2004 (G. Delvare) [Ref. CIRAD 18136].
 Diagnosis. Body entirely pale yellow, without transverse stripe on metanotum. Head with similar habitus and proportions as for E. cocois. Frons with oblique grooves. Scape 3.9–4.6 times as long as wide. Clava 4.5– 5.1 times as long as wide, its dorsal margin fairly convex. Mid lobe of mesoscutum with 2 pairs of setae. Submarginal vein bearing 2 dorsal setae basad parastigma. Costal cell with 3–4 apical dorsal hairs. Fore wing disc with 7–11 hairs basad linea calva. Apical spur of mid tibia about two thirds as long as relevant basitarsus. Gastral tergites 1–5 with paired setae as follows: 1,1,1(2),2,2. Only 4–6 sternal setae behind apex of phragma.
The species was identified with the key provided by Rose (2000). The identity of the specimens examined is somewhat doubtful as their relative measurements slightly differ from that calculated from figures supplied by the author. Nevertheless the same measurements fit perfectly those of the description.
description: Published as part of Delvare, Gérard, Genson, Gwenaelle, Borowiec, Nicolas, Étienne, Jean, Karimé, Anli- Liochouroutu Abdoul & Beaudoin-Ollivier, Laurence, 2008, Description of Eretmocerus cocois sp. n. (Hymenoptera: Chalcidoidea), a parasitoid of Aleurotrachelus atratus (Hemiptera: Aleyrodidae) on the coconut palm, pp. 47-62 in Zootaxa 1723 on pages 56-57, DOI: 10.5281/zenodo.181137
Modeling the coupled return-spread high frequency dynamics of large tick assets
Creators: name: Curato, Gianbiagio
name: Lillo, Fabrizio
Publisher: name: arXiv
Year: 2013
Subjects: subject: Trading and Market Microstructure (q-fin.TR)
subject: FOS: Economics and business
subject: 60J20

description: Large tick assets, i.e. assets where one tick movement is a significant fraction of the price and bid-ask spread is almost always equal to one tick, display a dynamics in which price changes and spread are strongly coupled. We introduce a Markov-switching modeling approach for price change, where the latent Markov process is the transition between spreads. We then use a finite Markov mixture of logit regressions on past squared returns to describe the dependence of the probability of price changes. The model can thus be seen as a Double Chain Markov Model. We show that the model describes the shape of return distribution at different time aggregations, volatility clustering, and the anomalous decrease of kurtosis of returns. We calibrate our models on Nasdaq stocks and we show that this model reproduces remarkably well the statistical properties of real data.
description: 28 pages, 13 figures
Dilations, inclusions of matrix convex sets, and completely positive maps
Creators: name: Davidson, Kenneth R.
name: Dor-On, Adam
name: Shalit, Orr
name: Solel, Baruch
Publisher: name: arXiv
Year: 2016
Subjects: subject: Operator Algebras (math.OA)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 47A13, 47B32, 12Y05, 13P10

description: A matrix convex set is a set of the form $\mathcal{S} = \cup_{n\geq 1}\mathcal{S}_n$ (where each $\mathcal{S}_n$ is a set of $d$-tuples of $n \times n$ matrices) that is invariant under UCP maps from $M_n$ to $M_k$ and under formation of direct sums. We study the geometry of matrix convex sets and their relationship to completely positive maps and dilation theory. Key ingredients in our approach are polar duality in the sense of Effros and Winkler, matrix ranges in the sense of Arveson, and concrete constructions of scaled commuting normal dilation for tuples of self-adjoint operators, in the sense of Helton, Klep, McCullough and Schweighofer.
 Given two matrix convex sets $\mathcal{S} = \cup_{n \geq 1} \mathcal{S}_n,$ and $\mathcal{T} = \cup_{n \geq 1} \mathcal{T}_n$, we find geometric conditions on $\mathcal{S}$ or on $\mathcal{T}$, such that $\mathcal{S}_1 \subseteq \mathcal{T}_1$ implies that $\mathcal{S} \subseteq C\mathcal{S}$ for some constant $C$.
 For instance, under various symmetry conditions on $\mathcal{S}$, we can show that $C$ above can be chosen to equal $d$, the number of variables, and in some cases this is sharp. We also find an essentially unique self-dual matrix convex set $\mathcal{D}$, the self-dual matrix ball, for which corresponding inclusion and dilation results hold with constant $C=\sqrt{d}$.
 Our results have immediate implications to spectrahedral inclusion problems studied recently by Helton, Klep, McCullough and Schweighofer. Our constants do not depend on the ranks of the pencils determining the free spectrahedra in question, but rather on the "number of variables" $d$. There are also implications to the problem of existence of (unital) completely positive maps with prescribed values on a set of operators.
description: Proposition 6.3, Corollary 6.4 and Theorem 6.5 in the previous version do not hold in the generality claimed. In this version we added "non-singularity" assumption (Definition 6.3) under which these results hold; in the new version they appear as Proposition 6.7, Corollary 6.8 and Theorem 6.9. 52 pages
Population synthesis of Thorne-Żytkow objects: Rejuvenated donors and unexplored progenitors in the common envelope formation channel
Creators: name: Nathaniel, K.
name: Vigna-Gómez, A.
name: Grichener, A.
name: Farmer, R.
name: Renzo, M.
name: Everson, R. W.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Context. Common envelope evolution of a massive star and a neutron star companion has two possible outcomes: formation of a short-period binary (a potential gravitational wave source progenitor) or a merger of the massive star with the neutron star. If the binary merges, a structure with a neutron star core surrounded by a large diffuse envelope, a so-called Thorne-Żytkow object (TŻO), may form. The predicted appearance of this hypothetical class of star is very similar to red supergiants, making observational identification difficult.
 Aims. Our objective is to understand the properties of systems that are potential TŻO progenitors, e.g., binary systems that enter a common envelope phase with a neutron star companion. We also aim to distinguish those that have been through a previous stable mass transfer phase, which can rejuvenate the accretor. We estimate the number of TŻOs in the Milky Way and assess the impact of uncertainties in their formation.
 Methods. We use the rapid population synthesis code COMPAS at Solar metallicity and with common envelope efficiency parameter set to unity to determine the population demographics of TŻOs. We use one-dimensional evolutionary TŻO models from the literature to determine a fit for TŻO lifetime in order to estimate the current number of TŻOs in the Galaxy as well as to assess core disruption during the merger.
 Results. We explore the progenitors in the Hertzsprung-Russell diagram, calculate formation rates, and investigate kinematics of the progenitor stars. We find that the vast majority ($\approx 92\%$) of TŻO progenitors in our population have experienced mass transfer and become rejuvenated before their formation event. Using a constant star formation rate we estimate $\approx 2\times 10 ^{-4}$ TŻOs per $M_\odot$ in our Galaxy, corresponding to $\approx 5\pm 1$ TŻOs in the Milky Way at present.
description: 12 pages, 6 figures. Accepted in A&A
Tverberg plus constraints
Creators: name: Blagojević, Pavle V. M.
name: Frick, Florian
name: Ziegler, Günter M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Combinatorics (math.CO)
subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics
subject: 52A35, 55S35

description: Many of the strengthenings and extensions of the topological Tverberg theorem can be derived with surprising ease directly from the original theorem: For this we introduce a proof technique that combines a concept of "Tverberg unavoidable subcomplexes" with the observation that Tverberg points that equalize the distance from such a subcomplex can be obtained from maps to an extended target space. Thus we obtain simple proofs for many variants of the topological Tverberg theorem, such as the colored Tverberg theorem of Zivaljevic and Vrecica (1992). We also get a new strengthened version of the generalized van Kampen-Flores theorem by Sarkaria (1991) and Volovikov (1996), an affine version of their "j-wise disjoint" Tverberg theorem, and a topological version of Soberon's (2013) result on Tverberg points with equal barycentric coordinates.
description: 15 pages; revised version, accepted for publication in Bulletin London Math. Society
Flore d'Afrique centrale - Spermatophyta - Podostemaceae
Creators: name: Hauman, L.
Publisher: name: Zenodo
Year: 1948
Subjects: Flora
Plants
Identification
Botany
Systematics
Taxonomy
Central Africa
Democratic Republic of the Congo
Rwanda
Burundi

description: PDF version of treatment of Podostemaceae in Flore d'Afrique centrale series
The (non-)variability of magnetic chemically peculiar candidates in the Large Magellanic Cloud
Creators: name: Paunzen, E.
name: Mikulasek, Z.
name: Poleski, R.
name: Krticka, J.
name: Netopil, M.
name: Zejda, M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The galactic magnetic chemically peculiar (mCP) stars of the upper main sequence are well known as periodic spectral and light variables. The observed variability is obviously caused by the uneven distribution of overabundant chemical elements on the surfaces of rigidly rotating stars. The mechanism causing the clustering of some chemical elements into disparate structures on mCP stars has not been fully understood up to now. The observations of light changes of mCP candidates recently revealed in the nearby Large Magellanic Cloud (LMC) should provide us with information about their rotational periods and about the distribution of optically active elements on mCP stars born in other galaxies. We queried for photometry at the Optical Gravitational Lensing Experiment (OGLE)-III survey of published mCP candidates selected because of the presence of the characteristic 5200A flux depression. In total, the intersection of both sources resulted in twelve stars. We performed our own and standard periodogram time series analyses of all available data. The final results are, amongst others, the frequency of the maximum peak and the bootstrap probability of its reality. We detected that only two mCP candidates, 190.1 1581 and 190.1 15527, may show some weak rotationally modulated light variations with periods of 1.23 and 0.49 days; however, the 49% and 32% probabilities of their reality are not very satisfying. The variability of the other 10 mCP candidates is too low to be detectable by their V and I OGLE photometry. The relatively low amplitude variability of the studied LMC mCP candidates sample can be explained by the absence of photometric spots of overabundant optically active chemical elements. The unexpected LMC mCPs behaviour is probably caused by different conditions during the star formation in the LMC and the Galaxy.
description: 11 pages, 22 figures
Eretmocerus gracilis Rose
Creators: name: Delvare, Gérard
name: Genson, Gwenaelle
name: Borowiec, Nicolas
name: Étienne, Jean
name: Karimé, Anli- Liochouroutu Abdoul
name: Beaudoin-Ollivier, Laurence
Publisher: name: Zenodo
Year: 2008
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Aphelinidae
Eretmocerus
Eretmocerus gracilis

description: Eretmocerus gracilis Rose
(Figs 21–22)
 Eretmocerus gracilis Rose, 2000: 11, 24–26, figs 21–22. Type locality. PERU: Sojo. Host: Aleurothrixus floccosus.
 Material examined (in CIRAD). GUADELOUPE: 3 ΨΨ (slide-mounted): Lamentin, Ravine Chaude, 01.v.1995, ex Aleurotrachelus trachoides Back (J. Etienne) [Ref. Étienne GP 1100, CIRAD 13690]; 1 Ψ (slidemounted) Pointe-des-Châteaux, 18.xii.1991, ex Aleyrodidae on Erithalis fruticosa (Rubiaceae) [Ref. Étienne GP 597, CIRAD 11492]. SAINT KITTS: 1 Ψ (slide-mounted) Fairview, 04.i.1994, on Cocos nucifera [Ref. Étienne KP4, CIRAD 13050(1)].
 Diagnosis. The Caribbean specimens perfectly fit Rose's (2000) description and figures. Head not rounded in frontal view; dorsal outline of vertex only slightly convex. Frons without oblique lines. Scrobal lines apparently not joining together above. Pedicel 2.20–2.50 times as long as wide and 0.48 times as long as scape. Clava 6.10–6.75 times as long as wide and 1.75–1.85 times as long as scape. Dorsal outline of clava almost straight except at apex, ventral outline slightly concave near apex. Mid lobe of mesoscutum with 3 pairs of setae. Marginal fringe of fore wing 0.26–0.33 times as long as the width of the wing. Submarginal vein with 3 dorsal setae basad parastigma. Costal cell with only 2–3 apical dorsal hairs. Fore wing disc with 8–10 hairs basad of linea calva. Apical spur of mid tibia about half as long as relevant basitarsus.
description: Published as part of Delvare, Gérard, Genson, Gwenaelle, Borowiec, Nicolas, Étienne, Jean, Karimé, Anli- Liochouroutu Abdoul & Beaudoin-Ollivier, Laurence, 2008, Description of Eretmocerus cocois sp. n. (Hymenoptera: Chalcidoidea), a parasitoid of Aleurotrachelus atratus (Hemiptera: Aleyrodidae) on the coconut palm, pp. 47-62 in Zootaxa 1723 on pages 57-58, DOI: 10.5281/zenodo.181137
A statistical mechanics investigation of Unfolded Protein Response across organisms
Creators: name: Luchetti, Nicole
name: Smith, Keith M.
name: Matarrese, Margherita A. G.
name: Loppini, Alessandro
name: Filippi, Simonetta
name: Chiodo, Letizia
Publisher: name: arXiv
Year: 2024
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Living systems rely on coordinated molecular interactions, especially those related to gene expression and protein activity. The Unfolded Protein Response is a crucial mechanism in eukaryotic cells, activated when unfolded proteins exceed a critical threshold. It maintains cell homeostasis by enhancing protein folding, initiating quality control, and activating degradation pathways when damage is irreversible. This response functions as a dynamic signaling network, with proteins as nodes and their interactions as edges. We analyze these protein-protein networks across different organisms to understand their intricate intra-cellular interactions and behaviors. In this work, analyzing twelve organisms, we assess how fundamental measures in network theory can individuate seed-proteins and specific pathways across organisms. We employ network robustness to evaluate and compare the strength of the investigated PPI networks, and the structural controllability of complex networks to find and compare the sets of driver nodes necessary to control the overall networks. We find that network measures are related to phylogenetics, and advanced network methods can identify main pathways of significance in the complete Unfolded Protein Response mechanism.
Bericht: 3D-Dokumentation eines Lochaxtfragmentes aus der Umgebung des Klosters Heiligkreuz in Cham
Creators: name: Künzli, Marco
Publisher: name: Zenodo
Year: 2022

description: Das Lochaxtfragment, welches beim Kloster Heiligkreuz in Cham gefunden wurde, ist im Kurs "Aus 2D mach' 3D - Einführung in die bildbasierte 3D-Dokumentation" der Universität Zürich als 3D-Modell erstellt worden.
3D Beam Reconstruction by Fluorescence Imaging
Creators: name: Radwell, Neal
name: Boukhet, Mordjane Alissa
name: Franke-Arnold, Sonja
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We present a technique for mapping the complete 3D spatial intensity profile of a laser beam from its fluorescence in an atomic vapour. We propagate shaped light through a rubidium vapour cell and record the resonant scattering from the side. From a single measurement we obtain a camera limited resolution of 200 x 200 transverse points and 659 longitudinal points. In constrast to invasive methods in which the camera is placed in the beam path, our method is capable of measuring patterns formed by counterpropagating laser beams. It has high resolution in all 3 dimensions, is fast and can be completely automated. The technique has applications in areas which require complex beam shapes, such as optical tweezers, atom trapping and pattern formation.
description: 7 pages, 6 figures
Inflating without a flat potential: Viscous inflation
Creators: name: Visinelli, Luca
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Bulk viscosity leads to negative pressure, which is a key ingredient for successful inflation. We build an inflationary model where the slow-roll of the inflaton field is driven by a viscous component instead of the flat potential commonly used. Since viscosity does not contribute to the energy density of the Universe, the Hubble rate depends only on the kinetic energy of the inflaton. The power spectrum is almost scale-invariant, with a tilt depending on the slow-roll parameters defined within the model.
description: 4 pages, references added, results unchanged with respect to version 1
Modified Patankar Linear Multistep methods for production-destruction systems
Creators: name: Izzo, Giuseppe
name: Messina, Eleonora
name: Pezzella, Mario
name: Vecchio, Antonia
Publisher: name: arXiv
Year: 2024
Subjects: subject: Numerical Analysis (math.NA)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 65L05 (Primary) 65L06, 34B18 (Secondary)

description: Modified Patankar schemes are linearly implicit time integration methods designed to be unconditionally positive and conservative. In the present work we extend the Patankar-type approach to linear multistep methods and prove that the resulting discretizations retain, with no restrictions on the step size, the positivity of the solution and the linear invariant of the continuous-time system. Moreover, we provide results on arbitrarily high order of convergence and we introduce an embedding technique for the Patankar weight denominators to achieve it.
Algebras of bounded noncommutative analytic functions on subvarieties of the noncommutative unit ball
Creators: name: Salomon, Guy
name: Shalit, Orr
name: Shamovich, Eli
Publisher: name: arXiv
Year: 2017
Subjects: subject: Operator Algebras (math.OA)
subject: FOS: Mathematics

description: We study algebras of bounded, noncommutative (nc) analytic functions on nc subvarieties of the nc unit ball. Given a nc variety $\mathfrak{V}$ in the nc unit ball $\mathfrak{B}_d$, we identify the algebra of bounded analytic functions on $\mathfrak{V}$ --- denoted $H^\infty(\mathfrak{V})$ --- as the multiplier algebra $\operatorname{Mult} \mathcal{H}_{\mathfrak{V}}$ of a certain reproducing kernel Hilbert space $\mathcal{H}_{\mathfrak{V}}$ consisting of nc functions on $\mathfrak{V}$. We find that every such algebra $H^\infty(\mathfrak{V})$ is completely isometrically isomorphic to the quotient $H^\infty(\mathfrak{B}_d)/ \mathcal{J}_{\mathfrak{V}}$ of the algebra of bounded nc holomorphic functions on the ball by the ideal $\mathcal{J}_{\mathfrak{V}}$ of bounded nc holomorphic functions which vanish on $\mathfrak{V}$.
 We investigate the problem of when two algebras $H^\infty(\mathfrak{V})$ and $H^\infty(\mathfrak{W})$ are isometrically isomorphic. If the variety $\mathfrak{W}$ is the image of $\mathfrak{V}$ under a nc analytic automorphism of $\mathfrak{B}_d$, then $H^\infty(\mathfrak{V})$ and $H^\infty(\mathfrak{W})$ are (completely) isometrically isometric. We prove that the converse holds in the case where the varieties are homogeneous; in general we can only show that if the algebras are isometrically isomorphic, then there must be nc holomorphic maps between the varieties.
 Along the way we are led to consider some interesting problems on function theory in the nc unit ball. For example, we study various versions of the Nullstellensatz (that is, the problem of to what extent an ideal is determined by its zero set), and we obtain perfect Nullstellensatz in both the homogeneous as well as the commutative cases. We also consider similar problems regarding the bounded analytic functions that extend continuously to the boundary of $\mathfrak{B}_d$.
description: 52 pages. Final version. To appear in Trans. Amer. Math. Soc
A Study of the Selection of Flight Paths in Air Transport Operations
Creators: name: Rockefeller, William Curtis
Publisher: name: California Institute of Technology
Year: 1934
Subjects: Aeronautics

description: 1. GENERAL:

With the introduction of the modern high perfor­mance airplane
into the air transportation systems of the country it has become
increasingly necessary to make some study of the variables which
influence the proper selection of flight paths for the efficient
operation of the aircraft.

In the past it has been the practice in the air transport
industry to make a very rough estimate of the ef­fect of the winds
and thus determine the best altitude at which to fly on the course.
There has been a complete neg­lect of the possibilities which
are presented by a considera­tion of the airplane performance.

It is the purpose of this thesis to analize the effects of all
of these variables with a view to obtaining some practical
knowledge which may be valuable to the air transportation industry.

2. STATEMENT OF THE PROBLEM:

The problem in general is the following: To provide a means of
quickly determining before the start of a flight the path which the
pilot should follow in order to fly between any two points in the
minimum possible time. Thus for a given set of cruising specifications
for the air­plane, this path becomes the optimum, not only for time
elapsed, but also for economy of operation. The method must take into
account both aerodynamic and meteorological varia­tions.

To be of practical use in air transport operation the method
provided must have three definite qualifications.

1. It must be such as to be readily calculated for a given
flight by a person completely unfamiliar with aerodynamics and
airplane performance.

2. It must not require more than a few minutes to calculate for
a given flight.

3. It must be such that the data can be presented to the pilot
in a brief and useful form.

In addition to the above it is highly desirable to provide information
which will be of use to the pilot in properly navigating the airplane
along the course.

All of the above requirements have been carefully considered throughout
the analysis and the attempt has been made to incorporate them into
the resulting method to as great an extent as possible.
Supersymmetric Dirac Operator on the Noncommutative Geometry
Creators: name: Ishihara, Satoshi
name: Kataoka, Hironobu
name: Matsukawa, Atsuko
name: Sato, Hikaru
name: Shimojo, Masafumi
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We extend naturally the spectral triple which define noncommutative geometry (NCG) in order to incorporate supersymmetry and obtain supersymmetric Dirac operator D_M which acts on Minkowskian manifold. Inversely, we can consider the projection which reducts D_M to $\not{D}$, the Dirac operator of the original spectral triple. We investigate properties of the Dirac operator, some of which are inherited from the original Dirac operator. Z/2 grading and real structure are also supersymmetrically extended. Using supersymmetric invariant product, the kinematic terms of chiral and antichiral supermultiplets which represent the wave functions of matter particles and their superpartners are provided by D_M. Considering the fluctuation given by elements of the algebra to the extended Dirac operator, we can expect to obtain vector supermultiplet which includes gauge field and to obtain super Yang-Mills theory according to the supersymmetric version of spectral action principle.
description: arXiv admin note: text overlap with arXiv:1201.3448
Monoclonal antibodies against the newly identified allergen β-enolase from common carp (Cyprinus carpio)
Creators: name: Sližienė, Aistė
name: Plečkaitytė, Milda
name: Zaveckas, Mindaugas
name: Juškaitė, Karolina
name: Rudokas, Vytautas
name: Žvirblis, Gintautas
name: Žvirblienė, Aurelija
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biochemistry
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: Molecular Biology
subject: Physiology
subject: Biotechnology
subject: Evolutionary Biology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: Inorganic Chemistry
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: Plant Biology

description: β-enolase is a heat-labile fish allergen identified in different fish species. In this study, β-enolase gene was cloned from common carp muscle tissue and the target protein was expressed as a fusion with maltose binding protein (MBP-Eno) in E. coli. Recombinant MBP-Eno was reactive with blood serum specimens of fish-allergic patients, confirming that β-enolase is a newly identified allergen of common carp. Two monoclonal antibodies (MAbs) against recombinant β-enolase were generated that showed cross-reactivity with β-enolases of other organisms. Both antibodies recognized β-enolases from other fish species extracts, while MAb 6E4 showed a broad reactivity with pork, chicken, yeast, and E. coli samples. Epitope mapping using MBP-Eno variants revealed that β-enolase region comprising amino acids 623–698 presumably includes MAb 6E4 epitope. The generated broadly reactive MAb 6E4 directed against a conserved epitope of β-enolases may represent a valuable tool for the characterization of allergen extracts and fish allergy diagnostics.