cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Wie liest man Löcher?
Creators: name: Neumann, Carolin
Publisher: name: Gesellschaft für Informatik
Year: 2023

description: Früher war die Lochkarte ein beliebter Datenträger. Durch Stanzungen ließen sich darauf Nachrichten codieren und - zumindest von Eingeweihten - auch wieder decodieren. Gelingt es euch, unser Exemplar zu entschlüsseln?
Superconductivity in the Cu(Ir1-xPtx)2Se4 Spinel
Creators: name: Luo, Huixia
name: Klimczuk, Tomasz
name: Muechler, Lukas
name: Schoop, Leslie
name: Hirai, Daigorou
name: Fuccillo, M. K.
name: Felser, C.
name: Cava, R. J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We report the observation of superconductivity in the CuIr2Se4 spinel induced by partial substitution of Pt for Ir. The optimal doping level for superconductivity in Cu(Ir1-xPtx)2Se4 is x = 0.2, where Tc is 1.76 K. A superconducting Tc vs. composition dome is established between the metallic, normal conductor CuIr2Se4 and semiconducting CuIrPtSe4. Electronic structure calculations show that the optimal Tc occurs near the electron count of a large peak in the calculated electronic density of states and that CuIrPtSe4 is a band-filled insulator. Characterization of the superconducting state in this heavy metal spinel through determination of ΔC/γTc, indicates that it is BCS-like. The relatively high upper critical field at the optimal superconducting composition (Hc2(0) = 3.2 T) is much larger than that reported for analogous rhodium spinels and is comparable to or exceeds the Pauli field (mu0Hp), suggesting that strong spin orbit coupling may influence the superconducting state. Further, comparison to doped CuIr2S4 suggests that superconductivity in iridium spinels is not necessarily associated with the destabilization of a charge-ordered spin-paired state through doping.
SUPER-Screening
Creators: name: Brax, Philippe
name: Davis, Anne-Christine
name: Sakstein, Jeremy
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present a framework for embedding scalar-tensor models of screened modifed gravity such as chameleons, symmetrons and environmental dilatons into global supersymmetry. This achieved by secluding the dark sector from both the observable and supersymmetry breaking sectors. We examine the resulting supersymmetric features in a model-independent manner and find that, when the theory follows from an underlying supergravity, the mediation of supersymmetry breaking to the dark sector induces a soft mass for the scalar of order the gravitino mass. This is enough to forbid the construction of supersymmetric symmetrons and ensures that when other screening mechanisms operate, no object in the universe is unscreened thereby precluding any observable signatures. In view of a possible origin of modifed gravity within fundamental physics, we find that no-scale models are the only ones that can circumvent these features. We also present a novel mechanism where the coupling of the scalar to two other scalars charged under U(1) can dynamically generate a small cosmological constant at late times in the form of a Fayet-Iliopoulos term.
description: 10 pages, 1 figure
Theory and synthesis of bilayer graphene intercalated with ICl and IBr for low power device applications
Creators: name: Jadaun, Priyamvada
name: Movva, Hema C. P.
name: Register, Leonard F.
name: Banerjee, Sanjay K.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Graphene intercalation materials are potentially promising for the implementation of the ultra-low power, excitonic-condensate-based Bilayer pseudoSpin Field-Effect Transistor (BiSFET) concept, as well as other novel device concepts requiring a graphene interlayer dielectric. Using density functional theory (DFT) we study the structural and electronic properties of bilayer graphene intercalated with iodine monochloride (ICl) and iodine monobromide (IBr). We determine the structural configuration of ICl and IBr graphene intercalation compounds (GICs). We also conduct an in-depth exploration of inter-layer electronic coupling, using \textit{ab initio} calculations. The presence of intercalants dopes the graphene layer. It also reduces, but does not eliminate, the electronic coupling between graphene layers, which may enable BiSFET operation. In addition, we present experimental results for ICl-GIC synthesis and characterization.
title: Es dreht sich um uns
Creators: name: Weitz, Katharina
Publisher: name: Gesellschaft für Informatik
Year: 2023

description: KI ist das Buzzword dieser Tage. Wie wir als Menschen damit umgehen wollen, ist daher eine der wichtigsten Fragen unserer Zeit. Doch die ist nicht so einfach zu beantworten. Viele Expert*innen fordern, dass die Entscheidungen von neuronalen Netzen nachvollziehbar sein müssen.
title: Gewissensbits: Schutz oder Überwachung?
Creators: name: Schmidt, Marcus
name: Ullrich, Stefan
name: Claß, Christina B.
Publisher: name: Gesellschaft für Informatik
Year: 2023

description: Wenn Kinder sich ein Smartphone wünschen, stehen Eltern vor vielen schwierigen Entscheidungen. Unser Fallbeispiel stellt einige davon vor - und zeigt auch, wie diese bei Jugendlichen ankommen können.
title: Ausflüge in die Informatik
Creators: name: Resch, Alexandra
Publisher: name: Gesellschaft für Informatik
Year: 2023

description: Katharina Hölscher hat Wirtschaftsinformatik studiert, in Unternehmen gearbeitet und unterrichtet nun Informatik an einer Schule in Niedersachsen. Im Interview spricht sie darüber, wie sie als Quereinsteigerin den Informatikunterricht erlebt.
ESCALATOR Status Report March 2023
Creators: name: Van Der Walt, Anelda
name: Van Zaanen, Menno
name: Steyn, Juan
Publisher: name: Zenodo
Year: 2023
Subjects: digital humanities
computational social sciences
South Africa

description: In December 2020 the South African Centre for Digital Language Resources (SADiLaR) launched the ESCALATOR programme to support the development of an active and inclusive community of practice in Digital Humanities and Computational Social Sciences in South Africa. This report summarises activities and highlights of the ESCALATOR programme between December 2020 and March 2023. ----- ESCALATOR is developed and implemented in partnership with Talarify. SADiLaR is a research infrastructure established by the South African government's Department of Science and Innovation as part of the South African Research Infrastructure Roadmap (SARIR).
Measurement of the nonlinear refractive index in optical thin films
Creators: name: Steinecke, M.
name: Jupé, M.
name: Kiedrowski, K.
name: Ristau, D.
Publisher: name: Bellingham, WA : S P I E - International Society for Optical Engineering
Year: 2017
Subjects: subject: Kerr-effect
subject: nonlinear optics
subject: self-focusing
subject: thin films
subject: Deformation
subject: Laser damage
subject: Nonlinear optics
subject: Optical materials
subject: Refractive index
subject: Thin films
subject: Wavefronts
subject: Dielectric layer
subject: Nonlinear refractive index
subject: Optical thin films
subject: Propagation modeling
subject: Self-focusing
subject: Substrate material
subject: Theoretical approach
subject: Z-scan method
subject: Optical Kerr effect
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: Based on the z-scan method, an interferometric set-up for measuring the optical Kerr-effect was engineered and optimized. Utilizing a Mach-Zehnder configuration, the wave front deformation caused by the Kerr induced selffocusing is monitored. Fitting this deformation to a theoretical approach basing on a beam propagation model, the nonlinear refractive index is obtained. The procedure can be applied to measure the nonlinear refractive index of both, the substrate material as well as the deposited dielectric layer on top of the substrate. The nonlinear refractive index of a layer specially deposited for this purpose as well as for several substrate materials was measured and the results presented. © 2017 SPIE.
Investigating Signatures of Phase Transitions in Neutron-Star Cores
Creators: name: Somasundaram, Rahul
name: Tews, Ingo
name: Margueron, Jérôme
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Neutron stars explore matter at the highest densities in the universe such that their inner cores might undergo a phase transition from hadronic to exotic phases, e.g., quark matter. Such a transition could be associated with non-trivial structures in the density behavior of the speed of sound such as jumps and sharp peaks. Here, we employ a physics-agnostic approach to model the density dependence of the speed of sound in neutron stars and study to what extent the existence of non-trivial structures can be inferred from existing astrophysical observations of neutron stars. For this, we exhaustively study different equations of state, including as well those with explicit first-order phase transitions. We obtain a large number of different EoSs which reproduce the same astrophysical observations and obey the same physical constraints such as mechanical stability and causality. Among them, some have non-trivial structures in the sound speed while others do not. We conclude that astrophysical information to date do not require the existence of a phase transition to quark matter in the density range explored in the core of neutron stars.
description: 8 pages, 5 figures. Comments welcome
Geranium rivulare Vill.
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: G. rivulare Vill. (G. aconitifolium L'Heritier) Cat. 59 und 423. Die Standorte sind lichte Nadelwälder in der subalpinen Stufe. Bis 2700 m; abwärts bis 1150 m. 2: Jeur-Brûlée (J.) und Six Carro (F.) ob Fully; Vertsan ob Ardon (Wilczek, Romieux); nordöstlich Jeizenen (Dübi); Faldumalp (Rytz); Tälwald und Leiggernalp ob Ausserberg (Zwicky). - 3: Les Plangades am Gr. St. Bernhard (Melly); Val de Bagnes: gegen Louvie (Miller, Zwicky), Bonatchesse (Beauverd), Vasevay (Miller); Mayens-de-Riddes (Besse); Eingang des Val des Dix (J.); zwischen Eison und der Montagne d'Eison (Farquet und Maillefer); nördlich Volovron (Terretaz); Alpe de Praz Gras bei Arolla (Mariétan); Val de Zinal: zahlreiche Stellen (Mariétan, Sulger, Becherer); Turtmanngletscher (J.); Zeneggen, zwischen Unter- und Ober-Hellelen (Frl. Dr. M. Bergmann); Törbel, mehrfach (Stebler, Thommen); St. Niklaus, herabsteigend an der linken Talflanke unterhalb des Dorfes bis 1150 m (Becherer und Kilcher); Zermatt, hohe Stellen: ob Findelen, 2400 und 2600 m (Braun-Blanquet), Fluhalp, 2700 m (Wilczek); Saastal: Mattwaldalp (A. Keller), Siwinenalp (Becherer und Thommen), Brände-Gruben (iidem), Grundberg (Becherer), Almagelleralp (A. Keller, Becherer), Zermeiggern (J.), Furggalp (A. Keller); Visperterminen (J.); Nanztal-Gebüdemalp (Exk. Bern. Bot. Ges. 1954). - 3a: Ob der Wängenalp am Fussweg nach Hohsaas, etwa 1750 m (Becherer und Arnold). - 4: Riederhorn ob Mörel (Bernoulli, Lüdi); Binn-Stafelstatt (Schmidely) und Meili (Bernoulli) im Binntal. Kleinblütig:Täschalp (Mattertal), 2300m (Oberson 1955). Es handelt sich hier, wie bei der «var.» brachystemon Godet von G. silvaticum, um weibliche Exemplare der normal zwittrigen Art.
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
Enhancing the stability of a continuous-wave terahertz system by photocurrent normalization
Creators: name: Roggenbuck, A.
name: Langenbach, M.
name: Thirunavukkuarasu, K.
name: Schmitz, H.
name: Deninger, A.
name: Mayorga, I. Camara
name: Güsten, R.
name: Hemberger, J.
name: Grüninger, M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: In a continuous-wave terahertz system based on photomixing, the measured amplitude of the terahertz signal shows an uncertainty due to drifts of the responsivities of the photomixers and of the optical power illuminating the photomixers. We report on a simple method to substantially reduce this uncertainty. By normalizing the amplitude to the DC photocurrents in both the transmitter and receiver photomixers, we achieve a significant increase of the stability. If, e.g., the optical power of one laser is reduced by 10%, the normalized signal is expected to change by only 0.3%, i.e., less than the typical uncertainty due to short-term fluctuations. This stabilization can be particularly valuable for terahertz applications in non-ideal environmental conditions outside of a temperature-stabilized laboratory.
description: 6 figures
Functionalization of UV-curing adhesives for surface-integrated micro-polymer optical fibers
Creators: name: Hachicha, B.
name: Overmeyer, Ludger
Publisher: name: Bellingham, Wash. : SPIE
Year: 2016
Subjects: subject: communication
subject: optic
subject: optical
subject: optronic
subject: surface integrated
subject: waveguide
subject: Adhesives
subject: Automation
subject: Characterization
subject: Chip scale packages
subject: Cladding (coating)
subject: Communication
subject: Curing
subject: Electronics packaging
subject: Integrated optics
subject: Integration
subject: Optical fiber fabrication
subject: Optical fibers
subject: Optical waveguides
subject: Optics
subject: Plastic optical fibers
subject: Polymers
subject: Substrates
subject: Waveguides
subject: Mechanical characterizations
subject: Optical characterization
subject: Polymer optical waveguide
subject: Sensing applications
subject: Short distance communications
subject: Single mode waveguides
subject: Optical communication
subject: Konferenzschrift
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Polymer optical waveguides, especially single-mode waveguides are increasingly used for short distance communication, as well as for sensing applications. The realization of a working communication route requires different and sequentially realized steps. Generally, these steps are the packaging of semiconductor beam senders and receivers, the fabrication of an optical waveguide, the preparation of its end-facets, the alignment of different elements along their optical axis and the integration into a desired communication route. The development of a process, which integrates all these steps for planar surfaces, offers a reduction in time and an increase in flexibility. A sub-step toward such a highly automated system is the integration of optical waveguides into the planar surface. In this context, we are investigating the use of the micro-dispensing process to realize this integration step. We functionalize UV-curing adhesives as cladding for micro-optical cores as well as for inherent bonding to the substrate surface. For this purpose an optical characterization of the adhesives is necessary for an adequate core and cladding material combination. A ow behavior characterization is also relevant in order to analyze the used dispensing process with the selected adhesive. Finally, a mechanical characterization is done to test the adhesion of the core to the adhesive, as well as the adhesive to the substrate surface. In this paper we present a summary of the realized characterization of the selected polymer. Based on experiment results we infer limits and opportunities of this method. © 2016 SPIE.
NSLS-II X-ray diagnostics development
Creators: name: Ilinski, Petr
Publisher: name: arXiv
Year: 2013
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: NSLS-II x-ray diagnostics will provide continuous online data of electron beam dimensions, which will be used to derive electron beam emittance and energy spread. It will also provide information of electron beam tilt for coupling evaluation. X-ray diagnostics will be based on imaging of bending magnet and three-pole wiggler synchrotron radiation sources. Diagnostics from three-pole wiggler source will be used to derive particles energy spread. Beta and dispersion functions will have to be evaluated for emittance and particles energy spread calculations. Due to small vertical source sizes imaging need to be performed in x-ray energy range. X-ray optics with high numerical aperture, such as compound refractive lens, will be used to achieve required spatial resolution. Optical setups with different magnifications in horizontal and vertical directions fill be employed to deal with large aspect ratio of the source. X-ray diagnostics setup will include x-ray imaging optics, monochromatization, x-ray imaging and recording components.
description: Presented at the 2011 Particle Accelerator Conference (PAC11), New York, NY, March 28-April 1, 2011
Bendocapillary Instability of Liquid in a Flexible-Walled Channel
Creators: name: Bradley, Alexander T.
name: Hewitt, Ian J.
name: Vella, Dominic
Publisher: name: arXiv
Year: 2022
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We study the bendocapillary instability of a liquid droplet that part fills a flexible walled channel. Inspired by experiments in which a `weaving' pattern emerges as droplets of liquid are condensed slowly into deformable microchannels, we develop a mathematical model of this instability. We describe equilibria of the system, and use a combination of numerical methods, and asymptotic analysis in the limit of small channel wall deflections, to elucidate the key features of this instability. We find that configurations are always unstable to perturbations of sufficiently small wavenumber, that the growth rate of the instability is highly sensitive to the volume of liquid in the channel, and that both wetting and non-wetting configurations are susceptible to the instability in the same channel. Insight into novel interfacial instabilities opens the possibility for their control and thus exploitation in processes such as microfabrication.
description: 23 pages, 8 figures
X-ray view of four high-luminosity Swift/BAT AGN: Unveiling obscuration and reflection with Suzaku
Creators: name: Fioretti, V.
name: Angelini, L.
name: Mushotzky, R. F.
name: Koss, M.
name: Malaguti, G.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The Swift/BAT nine-month survey observed 153 AGN, all with ultra-hard X-ray BAT fluxes in excess of 10^-11 erg cm^-2 s^-1 and an average redshift of 0.03. Among them, four of the most luminous BAT AGN (44.73 < Log L(BAT) < 45.31) were selected as targets of Suzaku follow-up observations: J2246.0+3941 (3C 452), J0407.4+0339 (3C 105), J0318.7+6828, and J0918.5+0425. The column density, scattered/reflected emission, the properties of the Fe K line, and a possible variability are fully analyzed. For the latter, the spectral properties from Chandra, XMM-Newton and Swift/XRT public observations were compared with the present Suzaku analysis. Of our sample, 3C 452 is the only certain Compton-thick AGN candidate because of i) the high absorption and strong Compton reflection; ii) the lack of variability; iii) the "buried" nature, i.e. the low scattering fraction (<0.5%) and the extremely low relative [OIII] luminosity. In contrast 3C 105 is not reflection-dominated, despite the comparable column density, X-ray luminosity and radio morphology, but shows a strong long-term variability in flux and scattering fraction, consistent with the soft emission being scattered from a distant region (e.g., the narrow emission line region). The sample presents high (>100) X-to-[OIII] luminosity ratios, confirming the [OIII] luminosity to be affected by residual extinction in presence of mild absorption, especially for "buried" AGN such as 3C 452. Three of our targets are powerful FRII radio galaxies, making them the most luminous and absorbed AGN of the BAT Seyfert survey despite the inversely proportional N_H - L_X relation.
description: A&A paper in press, 17 pages
Evaluation of Thermal Imaging on Embedded GPU Platforms for Application in Vehicular Assistance Systems
Creators: name: Farooq, Muhammad Ali
name: Shariff, Waseem
name: Corcoran, Peter
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: This study is focused on evaluating the real-time performance of thermal object detection for smart and safe vehicular systems by deploying the trained networks on GPU & single-board EDGE-GPU computing platforms for onboard automotive sensor suite testing. A novel large-scale thermal dataset comprising of > 35,000 distinct frames is acquired, processed, and open-sourced in challenging weather and environmental scenarios. The dataset is a recorded from lost-cost yet effective uncooled LWIR thermal camera, mounted stand-alone and on an electric vehicle to minimize mechanical vibrations. State-of-the-art YOLO-V5 networks variants are trained using four different public datasets as well newly acquired local dataset for optimal generalization of DNN by employing SGD optimizer. The effectiveness of trained networks is validated on extensive test data using various quantitative metrics which include precision, recall curve, mean average precision, and frames per second. The smaller network variant of YOLO is further optimized using TensorRT inference accelerator to explicitly boost the frames per second rate. Optimized network engine increases the frames per second rate by 3.5 times when testing on low power edge devices thus achieving 11 fps on Nvidia Jetson Nano and 60 fps on Nvidia Xavier NX development boards.
description: 14 pages, 9 tables, and 27 figures
title: Geschichte der Balneologie, Hydroposie und Pegologie oder des Gebrauchs des Wassers zu religiösen, diäthetischen und medizinischen Zwecken, von B. M. Lersch, Würzburg 1863
Creators: name: Freudenberg, Johannes
Publisher: name: University Library Heidelberg
Year: 2016

description: Rezension zu: Geschichte der Balneologie, Hydoprosie und Pegologie oder des Gebrauchs des Wassers zu religiösen, diäthetischen und medizinischen Zwecken. Ein Beitrag zur Geschichte des Kultus und der Medizin von Dr. B. M. Lersch, Arzt in Aachen. Würzburg 1863. 242 S. mit 3 Tafeln.
The Role of Lattice Coupling in Establishing Electronic and Magnetic Properties in Quasi-One-Dimensional Cuprates
Creators: name: Lee, W. S.
name: Johnston, S.
name: Moritz, B.
name: Lee, J.
name: Yi, M.
name: Zhou, K. J.
name: Schmitt, T.
name: Patthey, L.
name: Strocov, V.
name: Kudo, K.
name: Koike, Y.
name: Brink, J. van den
name: Devereaux, T. P.
name: Shen, Z. X.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: High resolution resonant inelastic x-ray scattering has been performed to reveal the role of lattice-coupling in a family of quasi-1D insulating cuprates, Ca$_{2+5x}$Y$_{2-5x}$Cu$_5$O$_{10}$. Site-dependent low energy excitations arising from progressive emissions of a 70 meV lattice vibrational mode are resolved for the first time, providing a direct measurement of electron-lattice coupling strength. We show that such electron-lattice coupling causes doping-dependent distortions of the Cu-O-Cu bond angle, which sets the intra-chain spin exchange interactions. Our results indicate that the lattice degrees of freedom are fully integrated into the electronic behavior in low dimensional systems.
description: 5 pages, 4 figure
Deformation incompatibility enables hetero-deformation induced strengthening in Ti/Nb laminates
Creators: name: Jiang, S.
name: Peng, R. Lin
name: Zhao, X.
name: Zuo, L.
name: Jia, N.
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biophysics
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Cell Biology
subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: Marine Biology
subject: Science Policy
subject: Plasma Physics
subject: Hematology

description: Deformation incompatibility in Ti/Nb laminates under uniaxial tension was revealed by in-situ neutron diffraction. During uniform deformation of the bulk laminates, the hard Nb constrained by the soft Ti showed moderate work hardening and only slightly decreased flow stress. The mechanical incompatibility accumulated in both elastic and elasto-plastic regimes between the metals lead to pronounced hetero-deformation induced (HDI) strengthening, and the HDI stress was comparable to the maximum phase-to-phase interaction. The HDI hardening and interphase stress showed consistent evolution trends, implying that the interaction between dissimilar metals can be used as an important indicator for evaluating HDI strengthening and hardening. The phase-to-phase interaction is found to be an important indicator for evaluating the HDI strengthening and hardening in heterogeneous laminates, and the microstress analysis can guide the design of heterostructures.
Three-Algebra BFSS Matrix Theory
Creators: name: Sato, Matsuo
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We extend the BFSS matrix theory by means of Lie 3-algebra. The extended model possesses the same supersymmetry as the original BFSS matrix theory, and thus as the infinite momentum frame limit of M-theory. We study dynamics of the model by choosing the minimal Lie 3-algebra that includes u(N) algebra. We can solve a constraint in the minimal model and obtain two phases. In one phase, the model reduces to the original matrix model. In another phase, it reduces to a simple supersymmetric model.
description: 17 pages
Charged Higgs boson benchmarks in the CP-violating type-II 2HDM
Creators: name: Basso, Lorenzo
name: Lipniacka, Anna
name: Mahmoudi, Farvah
name: Moretti, Stefano
name: Osland, Per
name: Pruna, Giovanni Marco
name: Purmohammadi, Mahdi
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We discuss prospects for discovering a charged Higgs boson in the CP-violating type-II two-Higgs-doublet Model. In the light of recent LHC data, we focus on the parameter space that survives experimental as well as the theoretical constraints on the model. Once the phenomenological scenario is set, we analyse the scope for the LHC to discover a charged Higgs in association with the lightest neutral Higgs and a charged vector boson.
description: 6 pages, 2 figures, Prospects for Charged Higgs Discovery at Colliders 2012
Super-high formability of Al-5.0Zn-1.5Mg-1.5Cu (wt.%) alloy via gradient heterogeneous structure
Creators: name: Yuan, Liangliang
name: Guo, Mingxing
name: Qiao, Dexian
name: Liu, Zanyang
name: Zhuang, Linzhong
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Space Science
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Medicine
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences

description: A novel idea of precisely constructing gradient heterogeneous microstructure was proposed to greatly improve the formability of Al-Zn-Mg-Cu alloy by coupling multi-process firstly. After coupling control of the heterogeneous distribution of precipitates, strain energy storage and dislocation number density, a gradient distribution of coarse/fine grains can be constructed in the pre-aged alloy, resulting in a greatly enhanced average plastic strain ratio of 0.716. This work opens up a new frontier for achieving super-high room temperature formability without sacrificing the high strengths for Al-Zn-Mg-Cu alloys. This paper reports a gradient heterogeneous structure in Al-Zn-Mg-Cu alloys by coupling control of precipitates, strain energy storage and dislocation number density, resulting in a greatly enhanced average plastic strain ratio of 0.716.
Physico-chemical and computational studies of bacterial carbohydrates
Creators: name: Valliani, Moez
Publisher: name: Zenodo
Year: 2015

description: This MSc thesis is composed of two investigations: the structure of the capsular polysaccharide expressed on the surface of Clostridium perfringens strain 1395 and the Clostridium bolteae capsular polysaccharide conformation by molecular modelling. The majority of gas gangrene development is due to Clostridium perfringens. Clostridium bolteae was found present in the intestinal tract of children diagnosed with autism and not present in the control group. Developing a vaccine by targeting the capsular polysaccharide of virulent strains will help prevent the development of these detrimental infections. However, in order to produce a vaccine, the structure of the capsular polysaccharide must first be determined. The Clostridium perfringens capsular polysaccharide has yet to be fully characterized but has been found thus far to be an oligosaccharide repeat unit containing →4)-β-D-Glc-(1→3)-D-Gal(1→, →2)-[β-D-Glc-(1→3)]-α-D-Gal-(1→, →4)-α-D-GalNAc-(1→ and →3)-[β-D-Glc-(1→2)]-β-D-Man-(1→. The conformation of the Clostridium bolteae polysaccharide was found to be a right-handed seven-unit repeating helix.
description: URL: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/8862
Restricted Sum Formula of Multiple Zeta Values
Creators: name: Yuan, Haiping
name: Zhao, Jianqiang
Publisher: name: arXiv
Year: 2013
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics

description: Let Q(4n,d) be the sum of all multiple zeta values of depth d and weight 4n whose arguments are all multiples of 4. In this paper we derive a formula of Q(4n,d) for all d>2 as a finite sum involving binomial coefficients, Bernoulli numbers and the quantities Q(4m,2). The number of terms is about 3d^2/8 which is independent of n.
description: 8 pages
On Unfolded Approach To Off-Shell Supersymmetric Models
Creators: name: Misuna, N. G.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We construct and analyze unfolded off-shell systems for chiral and vector supermultiplets using multispinor formalism and external currents. We find that auxiliary variables of multispinor formalism allow for the interesting reorganization of the unfolded off-shell modules: one can unify dynamical and auxiliary scalars in the Wess-Zumino model, as well as an auxiliary pseudoscalar and a zero-helicity subsector in the vector supermultiplet, so that the resulting unfolded equations get simplified, while various constraints like chirality, electric current conservation and P-oddness of the pseudoscalar can be formulated entirely in terms of these auxiliary variables.
description: 16 pages. V3: form of eq.(4.19) corrected; explanatory comments after eqq (2.53) and (3.19) added; Introduction and Conclusion expanded; references added; minor typos corrected; this version is accepted for publication in PLB
Atomistic insights into the inhomogeneous nature of solute segregation to grain boundaries in magnesium
Creators: name: Pei, Risheng
name: Xie, Zhuocheng
name: Yi, Sangbong
name: Korte-Kerzel, Sandra
name: Guénolé, Julien
name: Al-Samman, Talal
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In magnesium alloys with multiple substitutional elements, solute segregation at grain boundaries (GBs) has a strong impact on many important material characteristics, such as GB energy and mobility, and therefore, texture. Although it is well established that GB segregation is inhomogeneous, the variation of GB solute composition for random boundaries is still not understood. In the current study, atomic-scale experimental and simulation techniques were used to investigate the compositional inhomogeneity of six different GBs. Three-dimensional atom probe tomography results revealed that GB solute concentration of Nd in Mg varies between 2 to 5 at.%. This variation was not only seen for different GB orientations but also within the GB plane. Correlated atomistic simulations suggest that the inhomogeneous segregation behavior observed experimentally stems from local atomic rearrangements within the GBs and introduce the notion of potential excess free volume in the context of improving the prediction of per-site segregation energies.
Repair Locality with Multiple Erasure Tolerance
Creators: name: Wang, Anyu
name: Zhang, Zhifang
Publisher: name: arXiv
Year: 2013
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: In distributed storage systems, erasure codes with locality $r$ is preferred because a coordinate can be recovered by accessing at most $r$ other coordinates which in turn greatly reduces the disk I/O complexity for small $r$. However, the local repair may be ineffective when some of the $r$ coordinates accessed for recovery are also erased. To overcome this problem, we propose the $(r,δ)_c$-locality providing $δ-1$ local repair options for a coordinate. Consequently, the repair locality $r$ can tolerate $δ-1$ erasures in total. We derive an upper bound on the minimum distance $d$ for any linear $[n,k]$ code with information $(r,δ)_c$-locality. For general parameters, we prove existence of the codes that attain this bound when $n\geq k(r(δ-1)+1)$, implying tightness of this bound. Although the locality $(r,δ)$ defined by Prakash et al provides the same level of locality and local repair tolerance as our definition, codes with $(r,δ)_c$-locality are proved to have more advantage in the minimum distance. In particular, we construct a class of codes with all symbol $(r,δ)_c$-locality where the gain in minimum distance is $Ω(\sqrt{r})$ and the information rate is close to 1.
description: 14 pages
Integrated 9Be+ multi-qubit gate device for the ion-trap quantum computer
Creators: name: Hahn, H.
name: Zarantonello, G.
name: Schulte, M.
name: Bautista-Salvador, A.
name: Hammerer, K.
name: Ospelkaus, C.
Publisher: name: London : Nature Publishing Group
Year: 2019
Subjects: subject: ion-trap quantum computer
subject: 9Be+ ions
subject: Quantum Charge-Coupled Device
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We demonstrate the experimental realization of a two-qubit Mølmer–Sørensen gate on a magnetic field-insensitive hyperfine transition in 9Be+ ions using microwave near-fields emitted by a single microwave conductor embedded in a surface-electrode ion trap. The design of the conductor was optimized to produce a high oscillating magnetic field gradient at the ion position. The measured gate fidelity is determined to be 98.2 ± 1.2% and is limited by technical imperfections, as is confirmed by a comprehensive numerical error analysis. The conductor design can potentially simplify the implementation of multi-qubit gates and represents a self-contained, scalable module for entangling gates within the quantum CCD architecture for an ion-trap quantum computer.
From Layers to Nanotubes: Transition Metal Disulfides TMS2
Creators: name: Zibouche, Nourdine
name: Kuc, Agnieszka
name: Heine, Thomas
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: MoS2 and WS2 layered transition-metal dichalcogenides are indirect band gap semiconductors in their bulk forms. Thinned to a monolayer, they undergo a transition and become direct band gap materials. Layered structures of that kind can be folded to form nanotubes. We present here the electronic structure comparison between bulk, monolayered and tubular forms of transition metal disulfides using first-principle calculations. Our results show that armchair nanotubes remain indirect gap semiconductors, similar to the bulk system, while the zigzag nanotubes, like a monolayer, are direct gap materials, what suggests interesting potential applications in optoelectronics.
description: published in EPJ B, 9 pages, 8 figures
Cocoon-shaped hollow mesoporous silica ellipsoids controlled by interfacial destabilization growth kinetics
Creators: name: Li, Yage
name: Ma, Congyang
name: Yu, Tianjia
name: Cai, Qiang
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biophysics
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: FOS: Biological sciences
subject: Developmental Biology
subject: Inorganic Chemistry

description: Rational design of hollow mesoporous silicas with distinctive morphology has attracted considerable interest for their promising applications of different functions. Herein, we reported hollow mesoporous silica ellipsoids with quasiperiodic cocoon-shape, and fully investigated the evolution of external morphology and interior structure with solution concentrations. However, synthetic theories used so far hardly provide reasonable explanation. Therefore, a morphogenetic mechanism upon interfacial destabilization dynamics is proposed based on the experimental results, in which unstable interfaces of emulsions influenced by harmonic perturbations are employed as secondary templates for the nonequilibrium deposition/diffusion of rod-like micelles, explaining well the controllability of the morphology. Taro-like hollow mesoporous silicas were produced via a secondary-templating strategy. A nonequilibrium growth based on interfacial destabilization dynamics is proposed for further design of mesoporous silicas with other distinctive patterns.
Erfassungen der Fledermausaktivität über dem Wald als Grundlage für methodische Empfehlungen zu Untersuchungen und Maßnahmen an Windkraftstandorten im Wald
Creators: name: Hurst, Johanna
Publisher: name: Hannover : Institutionelles Repositorium der Leibniz Universität Hannover
Year: 2020
Subjects: subject: bats
subject: wind energy
subject: forest sites
subject: acoustic activity
subject: mitigation measures
subject: Fledermäuse
subject: Windkraft
subject: Waldstandorte
subject: akustische Aktivitätsmessungen
subject: Minderungsmaßnahmen
subject: Dewey Decimal Classification::300 | Sozialwissenschaften, Soziologie, Anthropologie::330 | Wirtschaft::333 | Boden- und Energiewirtschaft::333,7 | Natürliche Ressourcen, Energie und Umwelt

description: Windkraftanlagen werden in Deutschland zunehmend auch an Waldstandorten errichtet. Da Wälder wichtige Habitate für Fledermäuse darstellen, muss bei der Planung und dem Betrieb von WEA im Wald der Fledermausschutz besonders intensiv berücksichtigt werden. In dieser Dissertation wurde zum einen analysiert, inwieweit die verschiedenen Bundesländer aktuell den besonderen Anforderungen an Waldstandorten gerecht werden. Zum anderen wurde mittels akustischer Methoden die Fledermausaktivität in der Höhe an Waldstandorten untersucht. Aus den Ergebnissen werden Empfehlungen für Voruntersuchungen und Maßnahmen zum Fledermausschutz an Waldstandorten abgeleitet.
View-based propagation of decomposable constraints
Creators: name: Correia, Marco
name: Barahona, Pedro
Publisher: name: arXiv
Year: 2013
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Constraints that may be obtained by composition from simpler constraints are present, in some way or another, in almost every constraint program. The decomposition of such constraints is a standard technique for obtaining an adequate propagation algorithm from a combination of propagators designed for simpler constraints. The decomposition approach is appealing in several ways. Firstly because creating a specific propagator for every constraint is clearly infeasible since the number of constraints is infinite. Secondly, because designing a propagation algorithm for complex constraints can be very challenging. Finally, reusing existing propagators allows to reduce the size of code to be developed and maintained. Traditionally, constraint solvers automatically decompose constraints into simpler ones using additional auxiliary variables and propagators, or expect the users to perform such decomposition themselves, eventually leading to the same propagation model. In this paper we explore views, an alternative way to create efficient propagators for such constraints in a modular, simple and correct way, which avoids the introduction of auxiliary variables and propagators.
description: The final publication is available at link.springer.com
Ghost propagator and ghost-gluon vertex from Schwinger-Dyson equations
Creators: name: Aguilar, A. C.
name: Ibáñez, D.
name: Papavassiliou, J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study an approximate version of the Schwinger-Dyson equation that controls the nonperturbative behavior of the ghost-gluon vertex, in the Landau gauge. In particular, we focus on the form factor that enters in the dynamical equation for the ghost dressing function, in the same gauge, and derive its integral equation, in the "one-loop dressed" approximation. We consider two special kinematic configurations, which simplify the momentum dependence of the unknown quantity; in particular, we study the soft gluon case, and the well-known Taylor limit. When coupled with the Schwinger-Dyson equation of the ghost dressing function, the contribution of this form factor provides considerable support to the relevant integral kernel. As a consequence, the solution of this coupled system of integral equations furnishes a ghost dressing function that reproduces the standard lattice results rather accurately, without the need to artificially increase the value of the gauge coupling.
description: 23 pages, 7 figures
Improving Privacy and Security in Unmanned Aerial Vehicles Network using Blockchain
Creators: name: Sachdeva, Hardik
name: Gupta, Shivam
name: Misra, Anushka
name: Chauhan, Khushbu
name: Dave, Mayank
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cryptography and Security (cs.CR)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: Unmanned Aerial Vehicles (UAVs), also known as drones, have exploded in every segment present in todays business industry. They have scope in reinventing old businesses, and they are even developing new opportunities for various brands and franchisors. UAVs are used in the supply chain, maintaining surveillance and serving as mobile hotspots. Although UAVs have potential applications, they bring several societal concerns and challenges that need addressing in public safety, privacy, and cyber security. UAVs are prone to various cyber-attacks and vulnerabilities; they can also be hacked and misused by malicious entities resulting in cyber-crime. The adversaries can exploit these vulnerabilities, leading to data loss, property, and destruction of life. One can partially detect the attacks like false information dissemination, jamming, gray hole, blackhole, and GPS spoofing by monitoring the UAV behavior, but it may not resolve privacy issues. This paper presents secure communication between UAVs using blockchain technology. Our approach involves building smart contracts and making a secure and reliable UAV adhoc network. This network will be resilient to various network attacks and is secure against malicious intrusions.
description: 18 Pages; 14 Figures; 2 Tables
Polarization And Switching Dynamics Study Of Ferroelectric Hafnium Zirconium Oxide For FeRAM And FeFET Applications
Creators: name: Lyu, Xiao
Publisher: name: Purdue University Graduate School
Year: 2023
Subjects: Electrical engineering not elsewhere classified

description: As a scalable and CMOS compatible novel ferroelectric material, the ferroelectric HZO thin film has been the promising material for various applications and continues to attract the attention of researchers. Achieving strong ferroelectricity and fast switching speed in ultrathin FE HZO film are crucial challenges for its applications towards scaled devices. The ferroelectric and anti-ferroelectric properties of HZO are investigated systematically down to 3 nm. The ferroelectric polarization, switching speed and the impact of ALD tungsten nitride electrodes are studied. Record high Pr on FE HZO and record high PS on AFE HZO are achieved with WN electrodes, especially in ultrathin sub-10 nm regime. The polarization switching speed of FE and AFE HZO, associated with C-V frequency dispersion, are also qualitatively studied. On the other side of the scaling limit, ferroelectric/dielectric stack superlattice structure is found to enhance the ferroelectricity in thick films which would have severely degraded. Ultrafast direct measurement on the transient ferroelectric polarization switching is used to study the switching speed in FE HZO with a crossbar MFM structure. Sub-nanosecond characteristic switching time of 925 ps was achieved, supported by the nucleation limited switching model. The impact of electric field, film thickness and device area on the polarization switching speed is systematically studied. The ferroelectric switching speed is significantly improved compared to previous reports and more importantly is approaching GHz regime, suggesting FE HZO to be competitive in high-speed non-volatile memory technology. Record fast polarization switch speed of 360 ps is obtained in sub-μm crossbar array FE HZO MFM devices. It also unveils that domain wall propagation speed in HZO is the limiting factor for switch speed and more aggressively scaled devices will offer much faster switch speed. The first experimental determination of nucleation time and domain wall (DW) velocity by studying switching dynamics of ferroelectric (FE) hafnium zirconium oxide (HZO) was performed. Experimental data and simulation results were used to quantitatively study the switching dynamics. The switching speed is degraded in high aspect ratio devices due to the longer DW propagation time or with dielectric interfacial layer due to the required additional tunneling and trapping time by the leakage current assist switch mechanism.
Quasi-phase-matching of high-order-harmonic generation using polarization beating in optical waveguides
Creators: name: Liu, Lewis Z.
name: O'Keeffe, Kevin
name: Hooker, Simon M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: A scheme for quasi-phase-matching high-harmonic generation is proposed in which polarization beating within a hollow core birefringent waveguide modulates the generation of harmonics. The evolution of the polarization of a laser pulse propagating in a birefringent waveguide is calculated and is shown to periodically modulate the harmonic generation process. The optimum conditions for achieving quasi-phase-matching using this scheme are explored and the growth of the harmonic intensity as a function of experimental parameters is investigated.