cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
User Subgrouping and Power Control for Multicast Massive MIMO over Spatially Correlated Channels
Creators: name: de la Fuente, Alejandro
name: Interdonato, Giovanni
name: Araniti, Giuseppe
Publisher: name: arXiv
Year: 2024
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Massive multiple-input-multiple-output (MIMO) is unquestionably a key enabler of the fifth-generation (5G) technology for mobile systems, enabling to meet the high requirements of upcoming mobile broadband services. Physical-layer multicasting refers to a technique for simultaneously serving multiple users, demanding for the same service and sharing the same radio resources, with a single transmission. Massive MIMO systems with multicast communications have been so far studied under the ideal assumption of uncorrelated Rayleigh fading channels. In this work, we consider a practical multicast massive MIMO system over spatially correlated Rayleigh fading channels, investigating the impact of the spatial channel correlation on the favorable propagation, hence on the performance. We propose a subgrouping strategy for the multicast users based on their channel correlation matrices' similarities. The proposed subgrouping approach capitalizes on the spatial correlation to enhance the quality of the channel estimation, and thereby the effectiveness of the precoding. Moreover, we devise a max-min fairness (MMF) power allocation strategy that makes the spectral efficiency (SE) among different multicast subgroups uniform. Lastly, we propose a novel power allocation for uplink (UL) pilot transmission to maximize the SE among the users within the same multicast subgroup. Simulation results show a significant SE gain provided by our user subgrouping and power allocation strategies. Importantly, we show how spatial channel correlation can be exploited to enhance multicast massive MIMO communications.
description: 14 pages, 25 figures
Very boosted Higgs in gluon fusion
Creators: name: Grojean, Christophe
name: Salvioni, Ennio
name: Schlaffer, Matthias
name: Weiler, Andreas
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The Higgs production and decay rates offer a new way to probe new physics beyond the Standard Model. While dynamics aiming at alleviating the hierarchy problem generically predict deviations in the Higgs rates, the current experimental analyses cannot resolve the long- and short-distance contributions to the gluon fusion process and thus cannot access directly the coupling between the Higgs and the top quark. We investigate the production of a boosted Higgs in association with a high-transverse momentum jet as an alternative to the $t\bar{t}h$ channel to pin down this crucial coupling. Presented first in the context of an effective field theory, our analysis is then applied to models of partial compositeness at the TeV scale and of natural supersymmetry.
description: 27 pages, 7 figures, 3 tables. v2: included analytic computation of CP-violating Higgs+jet, added references. Version accepted by JHEP
The Comparative Exploration of the Ice Giant Planets with Twin Spacecraft: Unveiling the History of our Solar System
Creators: name: Turrini, Diego
name: Politi, Romolo
name: Peron, Roberto
name: Grassi, Davide
name: Plainaki, Christina
name: Barbieri, Mauro
name: Lucchesi, David M.
name: Magni, Gianfranco
name: Altieri, Francesca
name: Cottini, Valeria
name: Gorius, Nicolas
name: Gaulme, Patrick
name: Schmider, François-Xavier
name: Adriani, Alberto
name: Piccioni, Giuseppe
Publisher: name: arXiv
Year: 2014
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In the course of the selection of the scientific themes for the second and third L-class missions of the Cosmic Vision 2015-2025 program of the European Space Agency, the exploration of the ice giant planets Uranus and Neptune was defined "a timely milestone, fully appropriate for an L class mission". Among the proposed scientific themes, we presented the scientific case of exploring both planets and their satellites in the framework of a single L-class mission and proposed a mission scenario that could allow to achieve this result. In this work we present an updated and more complete discussion of the scientific rationale and of the mission concept for a comparative exploration of the ice giant planets Uranus and Neptune and of their satellite systems with twin spacecraft. The first goal of comparatively studying these two similar yet extremely different systems is to shed new light on the ancient past of the Solar System and on the processes that shaped its formation and evolution. This, in turn, would reveal whether the Solar System and the very diverse extrasolar systems discovered so far all share a common origin or if different environments and mechanisms were responsible for their formation. A space mission to the ice giants would also open up the possibility to use Uranus and Neptune as templates in the study of one of the most abundant type of extrasolar planets in the galaxy. Finally, such a mission would allow a detailed study of the interplanetary and gravitational environments at a range of distances from the Sun poorly covered by direct exploration, improving the constraints on the fundamental theories of gravitation and on the behaviour of the solar wind and the interplanetary magnetic field.
description: 29 pages, 4 figures; accepted for publication on the special issue "The outer Solar System X" of the journal Planetary and Space Science. This article presents an updated and expanded discussion of the white paper "The ODINUS Mission Concept" (arXiv:1402.2472) submitted in response to the ESA call for ideas for the scientific themes of the future L2 and L3 space missions
Extending Higgs Inflation with TeV Scale New Physics
Creators: name: He, Hong-Jian
name: Xianyu, Zhong-Zhi
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Higgs inflation is among the most economical and predictive inflation models, although the original Higgs inflation requires tuning the Higgs or top mass away from its current experimental value by more than $2σ$ deviations, and generally gives a negligible tensor-to-scalar ratio $r \sim 10^{-3}$ (if away from the vicinity of critical point). In this work, we construct a minimal extension of Higgs inflation, by adding only two new weak-singlet particles at TeV scale, a vector-quark $T$ and a real scalar $S$. The presence of singlets $(T, S)$ significantly impact the renormalization group running of the Higgs boson self-coupling. With this, our model provides a wider range of the tensor-to-scalar ratio $r = O(0.1 - 10^{-3})$, consistent with the favored $r$ values by either BICEP2 or Planck data, while keeping the successful prediction of the spectral index $ n_s \simeq 0.96 $. It further allows the Higgs and top masses to fully fit the collider measurements. We also discuss implications for searching the predicted TeV-scale vector-quark $T$ and scalar $S$ at the LHC and future high energy pp colliders.
description: 20pp, to match JCAP Final Version
Overdiagnosis in COPD - scoping.pdf
Creators: name: Vestergaard, Thomas
name: Brodersen, John Brandt
name: Bjørch, Mille Falk
Publisher: name: figshare
Year: 2023
Subjects: Health management

description: The aim of this project is to conduct a scoping review to systematically identify, and map published empirical evidence about overdiagnosis of COPD.
Planck scale boundary conditions in the standard model with singlet scalar dark matter
Creators: name: Haba, Naoyuki
name: Kaneta, Kunio
name: Takahashi, Ryo
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate Planck scale boundary conditions on the Higgs sector of the standard model with a gauge singlet scalar dark matter. We will find that vanishing self-coupling and Veltman condition at the Planck scale are realized with the 126 GeV Higgs mass and top pole mass, 172 GeV $\lesssim M_t\lesssim$ 173.5 GeV, where a correct abundance of scalar dark matter is obtained with mass of 300 GeV $\lesssim m_S \lesssim$ 1 TeV. It means that the Higgs potential is flat at the Planck scale, and this situation can not be realized in the standard model with the top pole mass.
description: 12 pages, 4 figures, version accepted for publication in JHEP
On the complexity of the upgrading version of the maximal covering location problem
Creators: name: Baldomero-Naranjo, Marta
name: Kalcsics, Jörg
name: Rodríguez-Chía, Antonio M.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: Optimization and Control (math.OC)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: In this article, we study the complexity of the upgrading version of the maximal covering location problem with edge length modifications on networks. This problem is NP-hard on general networks. However, in some particular cases, we prove that this problem is solvable in polynomial time. The cases of star and path networks combined with different assumptions for the model parameters are analysed. In particular, we obtain that the problem on star networks is solvable in O(nlogn) time for uniform weights and NP-hard for non-uniform weights. On paths, the single facility problem is solvable in O(n^3) time, while the p-facility problem is NP-hard even with uniform costs and upper bounds (maximal upgrading per edge), as well as, integer parameter values. Furthermore, a pseudo-polynomial algorithm is developed for the single facility problem on trees with integer parameters.
On higher genus Welschinger invariants of Del Pezzo surfaces
Creators: name: Shustin, Eugenii
Publisher: name: arXiv
Year: 2014
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14N10, 14P05, 14N35

description: The Welschinger invariants of real rational algebraic surfaces count real rational curves which represent a given divisor class and pass through a generic conjugation-invariant configuration of points. No invariants counting real curves of positive genera are known in general. We indicate particular situations, when Welschinger-type invariants counting real curves of positive genera can be defined. We also prove the positivity and give asymptotic estimates for such Weischinger-type invariants for several del Pezzo surfaces of degree $\ge2$ and suitable real nef and big divisor classes. In particular, this yields the existence of real curves of given genus and of given divisor class passing through any appropriate configuration of real points on the given surface.
description: 29 pages, updated to published version, International Mathematics Research Notices 2014
Study of island formation in epitaxially strained films on unbounded domains
Creators: name: Bella, Peter
name: Goldman, Michael
name: Zwicknagl, Barbara
Publisher: name: arXiv
Year: 2014
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We consider a variational model for the formation of islands in heteroepitaxial growth on unbounded domains. We first derive the scaling regimes of the minimal energy in terms of the volume of the film and the amplitude of the crystallographic misfit. For small volumes, non-existence of minimizers is then proven. This corresponds to the experimentally observed wetting effect. On the other hand, we show the existence of minimizers for large volumes. We finally study the asymptotic behavior of the optimal shapes.
Intelligente Integration und Dissemination von Diensten in Smart Environments Crowdsourcing von Diensten für die pervasive Hochschule
Creators: name: Lehsten, Philipp
Publisher: name: Universität Rostock
Year: 2018
Subjects: subject: 004 Data processing Computer sciences

description: Diese Dissertation analysiert die Herausforderungen, die sich bei der Erfassung und Nutzung von Diensten in großflächigen, intelligenten Umgebungen im Allgemeinen und an pervasiven Hochschulen im Speziellen ergeben. Darauf aufbauend wurden konzeptionelle, technische und soziale Anforderungen definiert. Des Weiteren wurde Crowdsourcing als anwendbares Konzept identifiziert. Die präsentierten Ansätze werden in dem CASA-System gebündelt. Dabei handelt es sich um ein neuartiges, verteiltes System, das eine domänenübergreifende Dissemination und Integration von Diensten unterstützt.
Dynamics of localized waves in 1D random potentials: statistical theory of the coherent forward scattering peak
Creators: name: Lee, Kean Loon
name: Grémaud, Benoît
name: Miniatura, Christian
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: As recently discovered [PRL ${\bf 109}$ 190601(2012)], Anderson localization in a bulk disordered system triggers the emergence of a coherent forward scattering (CFS) peak in momentum space, which twins the well-known coherent backscattering (CBS) peak observed in weak localization experiments. Going beyond the perturbative regime, we address here the long-time dynamics of the CFS peak in a 1D random system and we relate this novel interference effect to the statistical properties of the eigenfunctions and eigenspectrum of the corresponding random Hamiltonian. Our numerical results show that the dynamics of the CFS peak is governed by the logarithmic level repulsion between localized states, with a time scale that is, with good accuracy, twice the Heisenberg time. This is in perfect agreement with recent findings based on the nonlinear $σ$-model. In the stationary regime, the width of the CFS peak in momentum space is inversely proportional to the localization length, reflecting the exponential decay of the eigenfunctions in real space, while its height is exactly twice the background, reflecting the Poisson statistical properties of the eigenfunctions. Our results should be easily extended to higher dimensional systems and other symmetry classes.
description: See the published article for the updated version
Closing in on the Tip of the CMSSM Stau Coannihilation Strip
Creators: name: Desai, Nishita
name: Ellis, John
name: Luo, Feng
name: Marrouche, Jad
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Near the tip of the stau coannihilation strip in the CMSSM with a neutralino LSP, the astrophysical cold dark matter density constraint forces the stau-neutralino mass difference to be small. If this mass difference is smaller than the tau mass, the stau may decay either in the outer part of an LHC detector - the `disappearing track' signature - or be sufficiently long-lived to leave the detector before decaying - the long-lived massive charged-particle signature. We combine searches for these signatures with conventional missing transverse energy searches during LHC Run 1, identifying the small remaining parts of the CMSSM stau coannihilation strip region that have not yet been excluded, and discussing how they may be explored during Run 2 of the LHC.
description: 19 pages, 6 figures. Fig. 1 and the corresponding text are changed due to the updated ATLAS result (ref.[16]). More details of our simulation are provided in Section 3.1. The caption of Fig. 6 and the corresponding text are changed. Matches the published version
Three essays on material weakness disclosures, restatement announcements, and auditor's litigation risk
Creators: name: Wans, Nader Refat Reiad
Publisher: name: No Publisher Supplied
Year: 2012

description: The first essay examines the information content of material weakness (MW) disclosures conditional on previously announced financial restatements. I distinguish between MW disclosures that primarily serve as an advance warning of potential misstatements and MWs that are disclosed concurrent with, or after, a restatement announcement. I find that the market reaction to MW disclosures following restatements is significantly lower than the reaction to early MW disclosures, consistent with the idea that the informational value of the late MW disclosures was communicated via the restatement news. To emphasize the importance of distinguishing between MW-related restatements and other MWs, I also examine managerial turnover following MW disclosures, showing that after controlling for concurrent and preceding restatements, the impact of MW disclosures on turnover– shown in prior literature - is greatly reduced. The second paper examines the market reaction to restatement announcements by studying the combined effects of restatements and prior MW disclosures. I hypothesize that restatement announcements following a MW should elicit less negative market reaction compared to unwarned restatements. I develop a sample of firms whose restatements were preceded by a MW related to the restatement and/or disclosed in one of the prior four quarters preceding the restatement. I show that firms which announce a restatement following a MW disclosure experience significantly more negative returns than do firms whose restatements were not preceded by a MW. Further analyses show that firms which make the bad news warnings are in high-litigious industries and have more adverse future operating performance than firms which do not issue warnings. The third essay examines the impact of auditors’ litigation risk on auditors’ reporting decisions and audit fees using a novel approach developed in prior literature. I find that auditors facing high litigation risk are more likely to issue a going concern report and an adverse internal control opinion and to charge higher audit fees. Overall, the results suggest that auditors’ incentives to report conservatively to their clients are positively associated with auditors’ litigation exposure.
ПРИМЕНЕНИЕ ИНТЕРАКТИВНЫХ СТРАТЕГИЙ ПРИ ПРОВЕДЕНИИ ЛЕКЦИОННЫХ ЗАНЯТИЙ ПО  ТЕОРЕТИЧЕСКОЙ МЕХАНИКЕ
Creators: name: доцент Махмудов Зокиржон Сотиволдиевич, доцент Даминов Жакбарали Абдивалиевич
Publisher: name: Zenodo
Year: 2023

description: В статье приведены результаты использования диаграммы Венна на лекционных занятиях по теоретической механике для повышения наглядности проводимых занятий.
          Ключевые слова. Диаграмма Венна, поступательное движение, вращательное движение, закон движения, скорость, ускорение, свободные кобебания, затухающие колебания, вынужденные колебания, характеристическое уравнение, дифференциальное уравнение, закон движения, амплитуда колебаний, синусоида.
Lumbar vertebral adaptation and bone stress injury in adolescent cricket fast bowlers
Creators: name: Keylock, Laura
Publisher: name: Loughborough University
Year: 2021
Subjects: Other health sciences not elsewhere classified

description: Cricket fast bowling generates substantial tri-planar trunk movement and ground reaction forces (GRF), and senior fast bowlers (FB) show marked lumbar spine bone mineral adaptation, specifically on the contralateral (CL) side of the vertebrae to their bowling arm, along with a high prevelance of lumbar bone stress injuries. It is unknown how adaptation develops in FB nor how it associates with loading characteristics. This thesis aimed to evaluate the adaptation of lumbar vertebrae in adolescent FB and how it differs according to skeletal and chronological age, bowling technique, or cricket and bone loading history, as well as potential risk factors for lumbar bone stress injury. 41 adolescent male FB aged 14-17 years were compared to 11 field sport controls, 41 age matched typical controls (TC), and 66 senior FB. All participants received an AP lumbar spine DXA scan and lumbar MRI scan, and 27 FB were followed up for a median of 2.22 years. FB underwent 3D motion analysis of their bowling technique, musculoskeletal measurement, and skeletal maturation assessment annually, as well as longitudinal recording of bowling workload, physical activity and injury monitoring. FB had substantially higher lumbar bone mineral, vertebral area, and width than TC. Bone mineral density Z-score of TC seemed more typical compared to the reference population than that of FB who were nearly 1 SD higher (mean ± SD L1-L4 Z-score of +0.19 ± 0.82 and +0.84 ± 1.19 respectively). Notably, FB had unique asymmetry within the lumbar spine with up to 8.66% higher bone mineral density on the CL side of L3, whereas in controls, bone mineral content was up to 7.08% greater on the ipsilateral side of L2. In FB, lumbar vertebral bone mineral and dimensions increased with age with significantly greater annual changes in younger FB compared to older. Peak GRF in Newtons and thoraco-lumbar maximum CL rotation predicted up to 44.6% variance in lumbar bone mineral. The incidence of prospective lumbar bone stress injury was 27.3 ± 18.6 injuries per 100 players per year, and chronological age was significantly greater in injured bowlers compared to uninjured. Adaptation to fast bowling substantially increases with age, particularly on the CL side. Increased bone strain during the bowling action, resulting from multidirectional forces, could increase adaptation at specific lumbar sites. Adolescent fast bowlers are at increased risk of lumbar bone stress injuries which may coincide with increases in bowling workload and intensity as fast bowlers step up playing levels whilst the lumbar spine is immature and less robust.
Reversible Transient Nucleation in Ionic Solutions as the Precursor of Ion Crystallization
Creators: name: Ren, Gan
name: Wang, Yanting
Publisher: name: arXiv
Year: 2013
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Molecular dynamics simulations for aqueous sodium chloride solutions were carried out at various concentrations. Supplementary to the Debye-Hückel theory, reversible transient nucleation of ions was observed even in dilute solutions. The average size of formed ion clusters and the lifetime of ion pairs increase with concentration until the saturation point, when ion clusters become stable and individual ions adjust their positions to form ordered lattice structures, leading to irreversible ion crystallization, which is beyond the description of the classical nucleation theory.
description: 4 pages, 5 figures, and 46 references
Documentation of a feasibility study for the development and evaluation of a model-based requirements engineering process in the domain of digital agriculture
Creators: name: Mannari, Chiara
Publisher: name: Zenodo
Year: 2023
Subjects: process modelling
MoDRE
agriculture
socio-technical system
diagrams

description: This archive contains the documentation produced in the feasibility study for the development and evaluation of a model-based requirements engineering process in the domain of agriculture. This research is part of the T 3.3 Farm Socio-technical Process Modelling of Use Cases of the EU CODECS research project (Call: [101060179 ]). Different versions of the diagrams developed in the study (UML class diagrams, i* goal diagrams and BPMN diagrams at different levels of development) are available, along with all the previous versions. Iterations on the document and feedbacks up to 11/22/2022 are recorded in the xls file, which is updated with all the iterations performed to refine the methodology. Additional feedback documents and a general document with the methodology proposal are also available.
Mining Circumgalactic Baryons in the Low-Redshift Universe
Creators: name: Liang, Cameron Jia
name: Chen, Hsiao-Wen
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: (Abridged) This paper presents an absorption-line study of the multiphase circumgalactic medium (CGM) based on observations of Lya, CII, CIV, SiII, SiIII, and SiIV absorption transitions in the vicinities of 195 galaxies at redshift z<0.176. The galaxy sample is established based on a cross-comparison between public galaxy and QSO survey data and is characterized by a median redshift of =0.041, a median projected distance of =362 kpc to the sightline of the background QSO, and a median stellar mass of log(M_star/M_sun) = 9.7 \pm 1.1. Comparing the absorber features identified in the QSO apectra with known galaxy properties has led to strong constraints for the CGM absorption properties at z~0.7 Rh from either low-mass dwarfs or high-mass galaxies. The lack of detected heavy elements in low- and high-ionization states suggests that either there exists a chemical enrichment edge at d~0.7 Rh or gaseous clumps giving rise to the observed absorption lines cannot survive at these large distances. Considering all galaxies at d>Rh leads to a strict upper limit for the covering fraction of heavy elements of ~3% (at a 95% confidence level) over d=(1-9) Rh. At d
description: 25 pages, 13 figures; accepted for publication in MNRAS
Exclusion in a priority queue
Creators: name: de Gier, Jan
name: Finn, Caley
Publisher: name: arXiv
Year: 2014
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We introduce the prioritising exclusion process, a stochastic scheduling mechanism for a priority queueing system in which high priority customers gain advantage by overtaking low priority customers. The model is analogous to a totally asymmetric exclusion process with a dynamically varying lattice length. We calculate exact local density profiles for an unbounded queue by deriving domain wall dynamics from the microscopic transition rules. The structure of the unbounded queue carries over to bounded queues where, although no longer exact, we find the domain wall theory is in very good agreement with simulation results. Within this approximation we calculate average waiting times for queueing customers.
description: 27 pages, 18 figures
Multigap Superconductivity in the Ferromagnetic Superconductor UCoGe Revealed by Thermal Conductivity Measurements
Creators: name: Howald, Ludovic
name: Taupin, Mathieu
name: Aoki, Dai
Publisher: name: arXiv
Year: 2014
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We performed thermal conductivity measurements on a single crystal of the ferromagnetic superconductorUCoGe under magnetic field. Two different temperature dependencies of the thermal conductivity are observed, for H//b linear at low magnetic field and quadratic for magnetic field larger than 1 Tesla. At the same field value, a plateau appears in the field dependency of the residual term of thermal conductivity. Such observations suggest a multigap superconductivity with a line of nodes in the superconducting gap.
description: 9 pages 4 figures
Composite materials for direct restorations on decayed molars: A scoping study protocol
Creators: name: Gueders, Audrey
name: Geerts, Sabine
name: Belleflamme, Marcia
name: Vandenput, Sandrina
Publisher: name: Open Science Framework
Year: 2023
Subjects: subject: Dentistry
subject: FOS: Clinical medicine
subject: Medicine and Health Sciences
subject: Molars
subject: Composite materials
subject: Extended cavities
subject: Dentistry
subject: Scoping review

description: The objective of this scoping review is to synthetize the existing literature regarding different resin composites used, in adults, to filling decayed molar teeth and to map outcome criteria to evaluate such as the technique used, the number of restorations, the evaluation criteria and other interesting information.
Traversable wormholes without exotic matter in multimetric repulsive gravity
Creators: name: Hohmann, Manuel
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We present a static, spherically symmetric, traversable wormhole solution to multimetric gravity which is sustained by only non-exotic matter, i.e., matter which satisfies all energy conditions. The possibility of this solution arises from the fact that under certain conditions the multimetric gravitational field equations reduce to the Einstein equations, but with a negative effective gravitational constant. We show that the Arnowitt-Deser-Misner mass of this wormhole vanishes, so that it appears massless to observers in the asymptotically flat spacetime. We finally speculate on the feasibility of creating and maintaining this type of wormhole by an advanced civilization.
description: 8 pages, 1 figure; journal version
Supplementary figures and tables from Quaternary megafasuna extinctions altered body size distribution in tortoises
Creators: name: Joos, Julia
name: Pimiento, Catalina
name: Miles, Donald B.
name: Müller, Johannes
Publisher: name: The Royal Society
Year: 2022
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: 40308 Palaeontology (incl. Palynology)
subject: FOS: Earth and related environmental sciences

description: Additional figures and tables supporting the results section of 'Quaternary megafauna extinctions altered body size distribution in tortoises'.
Signatures of Lévy flights with annealed disorder
Creators: name: Baudouin, Q.
name: Pierrat, R.
name: Eloy, A.
name: Nunes-Pereira, E. J.
name: Cuniasse, P. -A.
name: Mercadier, N.
name: Kaiser, R.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We present theoretical and experimental results of Lévy flights of light originating from a random walk of photons in a hot atomic vapor. In contrast to systems with quenched disorder, this system does not present any correlations between the position and the step length of the random walk. In an analytical model based on microscopic first principles including Doppler broadening we find anomalous Lévy-type superdiffusion corresponding to a single-step size distribution P(x) proportional to x^(-1-alpha), with alpha=1. We show that this step size distribution leads to a violation of Ohm's law [T_(diff) proportional to L^(-alpha/2) different from 1/L], as expected for a Lévy walk of independent steps. Furthermore the spatial profile of the transmitted light develops power law tails [I(r) proportional to r^(-3-alpha)]. In an experiment using a slab geometry with hot rubidium vapor, we measured the total diffuse transmission T_(diff) and the spatial profile of the transmitted light T_{diff}(r). We obtained the microscopic Lévy parameter alpha under macroscopic multiple scattering conditions paving the way to investigation of Lévy flights in different atomic physics and astrophysics systems.
Epitaxial Growth of Room-Temperature Ferromagnetic MnAs Segments on GaAs Nanowires via Sequential Crystallization
Creators: name: Hubmann, Joachim
name: Bauer, Benedikt
name: Körner, H. S.
name: Furthmeier, Stephan
name: Buchner, Martin
name: Bayreuther, Günther
name: Dirnberger, D.
name: Schuh, Dieter
name: Back, Christian
name: Zweck, Josef
name: Reiger, Elisabeth
name: Bougeard, Dominique
Publisher: name: Universität Regensburg
Year: 2016
Subjects: subject: ELECTRICAL SPIN INJECTION; MOLECULAR-BEAM EPITAXY; MAGNETIC-PROPERTIES; CORE-SHELL; SEMICONDUCTORS; SILICON; ORIENTATION; FLOW; MnAs segment; GaAs nanowire; deterministic epitaxial growth; room-temperature ferromagnet; sequential crystallization; single-domain
subject: 530 Physik

description: We investigate the incorporation of manganese into self-catalyzed GaAs nanowires grown in molecular beam epitaxy. Our study reveals that Mn accumulates in the liquid Ga droplet and that no significant incorporation into the nanowire is observed. Using a sequential crystallization of the droplet, we then demonstrate a deterministic and epitaxial growth of MnAs segments at the nanowire tip. This technique may allow the seamless integration of multiple room temperature ferromagnetic segments into GaAs nanowires with high-crystalline quality:
Supplementary figures and tables;Table S1: Body size data set of fossil testudinids;Table S2: Body size data set of extant testudinids;Table S3: Summarized body size data of extant testudinids included in paleoTS analysis from Quaternary megafasuna extinctions altered body size distribution in tortoises
Creators: name: Joos, Julia
name: Pimiento, Catalina
name: Miles, Donald B.
name: Müller, Johannes
Publisher: name: The Royal Society
Year: 2022
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: 40308 Palaeontology (incl. Palynology)
subject: FOS: Earth and related environmental sciences

description: Additional figures and tables supporting the results section of 'Quaternary megafauna extinctions altered body size distribution in tortoises'.;Table S1: Body size data set of fossil testudinids. Contains information on locality, taxonomy (Genus and Species name), straight carapace length [mm], age and geographic distribution. Additionally, it is stated whether carapace length was directly measured (m: exact measurements provided in reference, mf: measured from scaled figure, mo: estimated by original authors) or estimated (e: estimated from fragmentary carapace/plastron, ev: estimated from verbal description, ep: estimated from plastron length, ef: estimated from femur length, eh: estimated from humerus length, ec: estimated from claw phalanges). Further, it is stated on which continent the fossil record was recovered and whether it was continental (n: no) or insular (y: yes). Lastly, the reference from which the data were obtained is listed.;Table S2: Body size data set of extant testudinids. Contains information on Genus and Species names, collection numbers (Coll.-Nr.) and shell measurements (SCL: straight carapace length, CCL: curved carapace length, SCW: straight carapace width, CCW: curved carapace%"width, CH: carapace height, PL: plastron length (greatest), PW: plastron width (greatest). Further, geographic distribution is stated and whether species is continental (n: no) or insular (y: yes). Lastly, it is indicated whether the data was directly measured from collection material (Museum für Naturkunde) or the reference from which the measurement data were obtained.;Table S3: Table S3: Additional body size data of extant testudinids from sources reporting the data as summary statistics, these were only used in the paleoTS analysis that was conducted by summarising mean SCL per genus. Contains information on Genus and Species names, age, sample size, mean SCL and standard variation, and reference. Further, geographic distribution is indicated and whether the species is continental (n: no) or insular (y: yes).
O(d,d)-Duality in String Theory
Creators: name: Rennecke, Felix
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: A new method for obtaining dual string theory backgrounds is presented. Preservation of the Hamiltonian density and the energy momentum tensor induced by O(d,d)-transformations leads to a relation between dual sets of coordinate one-forms accompanied by a redefinition of the background fields and a shift of the dilaton. The necessity of isometric directions arises as integrability condition for this map. The isometry algebra is studied in detail using generalised geometry. In particular, non-abelian dualities and beta-transformations are contained in this approach. The latter are exemplified by the construction of a new approximate non-geometric background.
description: 19+5 pages; v2: minor corrections and references added; v3: comments and references added
On some inequalities of Chebyshev type
Creators: name: Shidlich, Andriy L.
name: Chaichenko, Stanislav O.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: G.1.2
subject: 26D15

description: We obtain some new inequalities of Chebyshev Type.
O'ZBEKISTON-TURKIYA SAVDO-IQTISODIY HAMKORLIK ISTIQBOLLAR
Creators: name: Abdulazizova, Oydinoy
Publisher: name: Zenodo
Year: 2023

description: Mazkur maqola O'zbekiston Respublikasi va Turkiya Respublikasi o'rtasidagi iqtisodiy  hamda qo'shma investitsiya loyihalari bo'yicha hamkorlik masalalarini o'z ichiga oladi.Shu bilan birga Tovar ayirboshlashni ko'paytirish hamda yetakchi kompaniyalar kooperatsiyasini  kengaytirish yo'lida muhim qadamlar ko'rib chiqilgan.
Towards quantification of the crucial Impact of auger recombination for the Efficiency droop in (AlInGa)N Quantum well structures
Creators: name: Nirschl, Anna
name: Binder, Michael
name: Schmid, Marina
name: Pietzonka, Ines
name: Lugauer, Hans-Jürgen
name: Zeisel, Roland
name: Sabathil, Matthias
name: Bougeard, Dominique
name: Galler, Bastian
Publisher: name: Universität Regensburg
Year: 2016
Subjects: subject: LIGHT-EMITTING-DIODES; GAN;
subject: 530 Physik

description: Recent experimental investigations on the reduction of internal quantum efficiency with increasing current density in (AlInGa)N quantum well structures show that Auger recombination is a significant contributor to the so-called "droop" phenomenon. Using photoluminescence (PL) test structures, we find Auger processes are responsible for at least 15 % of the measured efficiency droop. Furthermore, we confirm that electron-electron-hole (nnp) is stronger than electron-hole-hole (npp) Auger recombination in standard LEDs. The ratio of respective Auger coefficients is determined to be in the range 1 < C-nnp = C-npp <= 12. This asymmetry is shown to limit the detection efficiency of Auger processes in our PL-based approach. (C) 2016 Optical Society of America
An overview of nanoparticles commonly used in fluorescent bioimaging
Creators: name: Wolfbeis, Otto S.
Publisher: name: Universität Regensburg
Year: 2015
Subjects: subject: 540 Chemie

description: This article gives an overview of the various kinds of nanoparticles (NPs) that are widely used for purposes of fluorescent imaging, mainly of cells and tissues. Following an introduction and a discussion of merits of fluorescent NPs compared to molecular fluorophores, labels and probes, the article assesses the kinds and specific features of nanomaterials often used in bioimaging. These include fluorescently doped silicas and sol–gels, hydrophilic polymers (hydrogels), hydrophobic organic polymers, semiconducting polymer dots, quantum dots, carbon dots, other carbonaceous nanomaterials, upconversion NPs, noble metal NPs (mainly gold and silver), various other nanomaterials, and dendrimers. Another section covers coatings and methods for surface modification of NPs. Specific examples on the use of nanoparticles in (a) plain fluorescence imaging of cells, (b) targeted imaging, (c) imaging of chemical species, and (d) imaging of temperature are given next. A final section covers aspects of multimodal imaging (such as fluorescence/nmr), imaging combined with drug and gene delivery, or imaging combined with therapy or diagnosis. The electronic supplementary information (ESI) gives specific examples for materials and methods used in imaging, sensing, multimodal imaging and theranostics such as imaging combined with drug delivery or photodynamic therapy. The article contains 273 references in the main part, and 157 references in the ESI.
description: Open Access Komponente aus der Allianzlizenz
Superconducting phase transition of Sr2RuO4 in magnetic field
Creators: name: Mineev, V. P.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The superconducting state formed due to direct intra-orbital pairing in tetragonal multi-band superconductor Sr$_2$RuO$_4$ has different properties than the state formed due to intra-band pairing. In particular, the theory operating with direct intra-orbital pairing successfully explains the Kerr rotation of reflected light polarization observed several years ago. Here we apply intra-orbital approach to the problem of Ginzburg-Landau description of basal plane upper critical field in this material. It is shown that typical for two component superconducting state additional phase transition in the vortex state at $H
description: 7 pages
Appendices from Developmental feedbacks and the emergence of individuality
Creators: name: Ehlman, Sean M.
name: Scherer, Ulrike
name: Wolf, Max
Publisher: name: The Royal Society
Year: 2022
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: 60801 Animal Behaviour

description: Behavioural individuality is a hallmark of animal life, with major consequences for fitness, ecology, and evolution. One of the most widely invoked explanations for the source of this variation is that feedback loops between an animal's behaviour and its state (e.g. physiology, informational state, social rank, etc.) trigger and shape the development of individuality. Despite their often-cited importance, however, little is known about the ultimate causes of such feedbacks. Expanding on a previously employed model of adaptive behavioural development under uncertainty, we find that (i) behaviour-state feedbacks emerge as a direct consequence of adaptive behavioural development in particular selective environments and (ii) that the sign of these feedbacks, and thus the consequences for the development of behavioural individuality, can be directly predicted by the shape of the fitness function, with increasing fitness benefits giving rise to positive feedbacks and trait divergence and decreasing fitness benefits leading to negative feedbacks and trait convergence. Our findings provide a testable explanatory framework for the emergence of developmental feedbacks driving individuality and suggest that such feedbacks and their associated patterns of behavioural diversity are a direct consequence of adaptive behavioural development in particular selective environments.
Probabilistic modelling of astrophysical time series : gravitational microlensing and occultation mapping of planets and moons
Creators: name: Bartolić, Fran
Publisher: name: The University of St Andrews
Year: 2023

description: Progress in astronomy in the 21st century is contingent on the ability to extract useful information from complex and noisy datasets. This requires modeling the data-generating process – a complex combination of the physical phenomenon of interest and the “noise”. The goal is to create an approximate model that captures the essence of this process and then fit it to the data. This thesis covers the development of new methods and tools for almost all aspects of the data analysis process in two fields of astronomy: gravitational microlensing and occultation/eclipse mapping. In both fields, the objective is to infer the physical properties of exoplanets, stars, or dark compact objects by measuring the brightness variations of a light source as a function of time. Building on recent advancements in statistics, machine learning, and computer science, I developed a new open-source package called caustics for computing the microlensing magnification in single, binary, and triple-lens microlensing events. I also tackled foundational questions on the statistical analysis of single-lens and multiple-lens microlensing events, developing a new paradigm for modeling degenerate single-lens microlensing events and demonstrating the flaws of commonly used methods for analyzing multiple-lens microlensing events. Moreover, I built models for reconstructing two-dimensional emission maps of spherical bodies, exoplanets, and Solar System objects from one-dimensional photometric occultation light curves. Together with collaborators, I developed a novel method for reconstructing spatial maps of volcanic emission on Jupiter’s moon Io from occultation light curves and used the same method for exoplanet eclipse mapping to explore the possibility of detecting weather and climate change on Hot Jupiters using simulated photometric JWST secondary eclipse light curves.
Valentín de Foronda. La difesa delle libertà individuali nelle Cartas sobre los asuntos más exquisitos de la economía política y sobre las leyes criminales (1789-1794)
Creators: name: Scandellari, Simonetta
Publisher: name: Dipartimento di Scienze Umane, Università di Ferrara
Year: 2019

description: I castelli di Yale online, Numeri a stampa 1996-2012
A method for studying the rapidity fluctuation and decorrelation of harmonic flow in heavy-ion collisions
Creators: name: Jia, Jiangyong
name: Huo, Peng
Publisher: name: arXiv
Year: 2014
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: An "event-shape twist" technique is proposed to study the longitudinal dynamics of harmonic flow, in particular the effects of rapidity fluctuation and event-plane decorrelation. This technique can distinguish between two types of rapidity decorrelation effects: a systematic rotation versus a random fluctuation of flow angles along the rapidity direction. The technique is demonstrated and the magnitude of the two decorrelation effects is predicted using the AMPT model via a single particle analysis and two-particle correlation analysis. An observed decorrelation can be attributed to a systematic rotation of event-plane angle along the pseudorapidity, consistent with a collective response to an initial state twist of the fireball proposed by Bozek {\it et.al.}. This rotation is also observed for several higher-order harmonics with the same sign and similar magnitudes.
description: 7 pages, 9 figures
Between People and Paper: Inhabiting Experiment in a Journal Club
Creators: name: Klein, Sarah
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Molecular Biology
subject: Neuroscience
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: In 2015, the Open Science Collaboration reported in the journal Science that a disturbingly large proportion of psychological studies cannot be replicated (Open Science Collaboration, 2015). The ensuing ‘reproducibility crisis’ became a lightning rod for contesting what counts as legitimate research, and for negotiating the relationship between communication infrastructures and research practice. In the psychological and cognitive sciences, the Open Science community has advocated widespread reforms to incentivize transparency, encourage replication, and detect and discourage questionable research practices. The model of ‘openness’ underlying mainstream Open Science centers on sharing information to increase science’s self-correcting capacity. Against the backdrop of broad-scale transformations in Open Science, this case study depicts how scientists read. By examining the activity of a group of researchers ‘virtually witnessing’ an experiment together, this study reveals reading as a non-trivial process that matters for how research is apprehended and for how science is moved through time and space. The case complicates a disembodied, information-centric ‘openness’ pursued by mainstream Open Science reforms and advocates integrating situated and embodied resources into methods reforms, beginning with practices of reading.