cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The connection between stellar activity cycles and magnetic field topology
Creators: name: See, V.
name: Jardine, M.
name: Vidotto, A. A.
name: Donati, J. -F.
name: Saikia, S. Boro
name: Bouvier, J.
name: Fares, R.
name: Folsom, C. P.
name: Gregory, S. G.
name: Hussain, G.
name: Jeffers, S. V.
name: Marsden, S. C.
name: Morin, J.
name: Moutou, C.
name: Nascimento, J. D. do
name: Petit, P.
name: Waite, I. A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Zeeman Doppler imaging has successfully mapped the large-scale magnetic fields of stars over a large range of spectral types, rotation periods and ages. When observed over multiple epochs, some stars show polarity reversals in their global magnetic fields. On the Sun, polarity reversals are a feature of its activity cycle. In this paper, we examine the magnetic properties of stars with existing chromospherically determined cycle periods. Previous authors have suggested that cycle periods lie on multiple branches, either in the cycle period-Rossby number plane or the cycle period-rotation period plane. We find some evidence that stars along the active branch show significant average toroidal fields that exhibit large temporal variations while stars exclusively on the inactive branch remain dominantly poloidal throughout their entire cycle. This lends credence to the idea that different shear layers are in operation along each branch. There is also evidence that the short magnetic polarity switches observed on some stars are characteristic of the inactive branch while the longer chromospherically determined periods are characteristic of the active branch. This may explain the discrepancy between the magnetic and chromospheric cycle periods found on some stars. These results represent a first attempt at linking global magnetic field properties obtained form ZDI and activity cycles.
description: 9 pages, 2 figures, 2 tables, accepted to MNRAS
Asymptotically Safe Hilbert-Palatini Gravity in an On-Shell Reduction Scheme
Creators: name: Gies, Holger
name: Salek, Abdol Sabor
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the renormalization flow of Hilbert-Palatini gravity to lowest non-trivial order. We find evidence for an asymptotically safe high-energy completion based on the existence of an ultraviolet fixed point similar to the Reuter fixed point of quantum Einstein gravity. In order to manage the quantization of the large number of independent degrees of freedom in terms of the metric as well as the connection, we use an on-shell reduction scheme: for this, we quantize all degrees of freedom beyond Einstein gravity at a given order that remain after using the equations of motion at the preceding order. In this way, we can straightforwardly keep track of the differences emerging from quantizing Hilbert-Palatini gravity in comparison with Einstein gravity. To lowest non-trivial order, the difference is parametrized by fluctuations of an additional abelian gauge field. The critical properties of the ultraviolet fixed point of Hilbert-Palatini gravity are similar to those of the Reuter fixed point, occurring at a smaller Newton coupling and exhibiting more stable higher order exponents.
description: 11 pages, 2 figures, 1 table
Optical properties and carrier localization in the layered phosphide EuCd$_\mathbf{2}$P$_\mathbf{2}$
Creators: name: Homes, C. C.
name: Wang, Z. -C.
name: Fruhling, K.
name: Tafti, F.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The temperature dependence of the complex optical properties of the layered phosphide material EuCd$_2$P$_2$ have been measured over a wide frequency range above and below $T_{\rm N} \simeq 11.5$ K for light polarized in the $a-b$ planes. At room temperature, the optical conductivity is well described by a weak free-carrier component with a Drude plasma frequency of $\simeq 1100$ cm$^{-1}$ and a scattering rate of $1/τ_D\simeq 700$ cm$^{-1}$, with the onset of interband absorptions above $\simeq 2000$ cm$^{-1}$. Two infrared-active $E_u$ modes are observed at $\simeq\,$89 and 239 cm$^{-1}$. As the temperature is reduced the scattering rate decreases and the low-frequency conductivity increases slightly; however, below $\simeq 50$ K the conductivity decreases until at the resistivity maximum at $\simeq 18$ K (just below $2T_{\rm N}$) the spectral weight associated with free carriers is transferred to a localized excitation at $\simeq 500$ cm$^{-1}$. Below $T_{\rm N}$, metallic behavior is recovered. Interestingly, the $E_u$ modes are largely unaffected by these changes, with only the position of the high-frequency mode showing any signs of anomalous behavior. While several scenarios are considered, the prevailing view is that the resistivity maximum and subsequent carrier localization is due to the formation of ferromagnetic domains below $\simeq 2T_{\rm N}$ that result in spin-polarized clusters due to spin-carrier coupling [1].
description: 8 pages with 6 figures; five pages of supplemental material
Causal influence in linear response models
Creators: name: Auconi, Andrea
name: Giansanti, Andrea
name: Klipp, Edda
Publisher: name: arXiv
Year: 2016
Subjects: subject: Other Statistics (stat.OT)
subject: FOS: Computer and information sciences

description: The intuition of causation is so fundamental that almost every research study in life sciences refers to this concept. However a widely accepted formal definition of causal influence between observables is still missing. In the framework of linear Langevin networks without feedbacks (linear response models) we developed a measure of causal influence based on a decomposition of information flows over time. We discuss its main properties and compare it with other information measures like the Transfer Entropy. Finally we outline some difficulties of the extension to a general definition of causal influence for complex systems.
description: 9 pages, 9 figures
SsODNet: The Solar system Open Database Network
Creators: name: Berthier, J.
name: Carry, B.
name: Mahlke, M.
name: Normand, J.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The sample of Solar system objects has dramatically increased over the last decade. The amount of measured properties (e.g., diameter, taxonomy, rotation period, thermal inertia) has grown even faster. However, this wealth of information is spread over a myriad of articles, under many different designations per object. We provide a solution to the identification of Solar system objects from any of their multiple names or designations. We also compile and rationalize their properties to provide an easy access to them. We aim to continuously update the database as new measurements become available. We built a Web Service, SsODNet, that offers four access points, each corresponding to an identified necessity in the community: name resolution (quaero), compilation of a large corpus of properties (datacloud), determination of the best estimate among compiled values (ssoCard), and statistical description of the population (ssoBFT). The SsODNet interfaces are fully operational and freely accessible to everyone. The name resolver quaero translates any of the ~5.3 million designations of objects into their current official designation. The datacloud compiles about 105 million parameters (osculating and proper elements, pair and family membership, diameter, albedo, mass, density, rotation period, spin coordinates, phase function parameters, colors, taxonomy, thermal inertia, and Yarkovsky drift) from over 3,000 articles (and growing). For each of the known asteroids and dwarf planets (~1.2 million), a ssoCard providing a single best-estimate for each parameter is available. The SsODNet service provides these resources in a fraction of second upon query. Finally, the large ssoBFT table compiles all the best-estimates in a single table for population-wide studies.
Compensated ferrimagnetic tetragonal Heusler thin films for antiferromagnetic spintronics
Creators: name: Sahoo, Roshnee
name: Wollmann, Lukas
name: Selle, Susanne
name: Höche, Thomas
name: Ernst, Benedikt
name: Kalache, Adel
name: Shekhar, Chandra
name: Kumar, Nitesh
name: Chadov, Stanislav
name: Felser, Claudia
name: Parkin, Stuart S. P.
name: Nayak, Ajaya K.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In recent years, antiferromagnetic spintronics has received much attention since ideal antiferromagnets do not produce stray fields and are much more stable to external magnetic fields compared to materials with net magnetization. Akin to antiferromagnets, compensated ferrimagnets have zero net magnetization but have the potential for large spin-polarization and strong out of plane magnetic anisotropy, and, hence, are ideal candidates for high density memory applications. Here, we demonstrate that a fully compensated magnetic state with a tunable magnetic anisotropy is realized in Mn-Pt-Ga based tetragonal Heusler thin films. Furthermore, we show that a bilayer formed from a fully compensated and a partially compensated Mn-Pt-Ga layer, exhibits a large interfacial exchange bias up to room temperature. The present work establishes a novel design principle for spintronic devices that are formed from materials with similar elemental compositions and nearly identical crystal and electronic structures. Such devices are of significant practical value due to their improved properties such as thermal stability. The flexible nature of Heusler materials to achieve tunable magnetizations, and anisotropies within closely matched materials provides a new direction to the growing field of antiferromagnetic spintronics.
description: 25 pages in Advanced Materials, 2016
Financing public higher education in the Philippines : an examination of the applicability of income contingent student loan scheme
Creators: name: Compra, Rio.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Excited quantum Hall effect: enantiomorphic flat bands in a Yin-Yang Kagome lattice
Creators: name: Zhou, Yinong
name: Sethi, Gurjyot
name: Liu, Hang
name: Wang, Zhengfei
name: Liu, Feng
Publisher: name: arXiv
Year: 2019
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum Hall effect (QHE) is one of the most fruitful research topics in condensed-matter physics. Ordinarily, the QHE manifests in a ground state with time-reversal symmetry broken by magnetization to carry a quantized chiral edge conductivity around a two-dimensional insulating bulk. We propose a theoretical concept and model of non-equilibrium excited-state QHE (EQHE) without intrinsic magnetization. It arises from circularly polarized photoexcitation between two enantiomorphic flat bands of opposite chirality, each supporting originally a helical topological insulating state hosted in a Yin-Yang Kagome lattice. The chirality of its edge state can be reversed by the handedness of light, instead of the direction of magnetization as in the conventional quantum (anomalous) Hall effect, offering a simple switching mechanism for quantum devices. Implications and realization of EQHE in real materials are discussed.
The cost of an ALP solution to the neutral $B$-anomalies
Creators: name: Bonilla, J.
name: de Giorgi, A.
name: Gavela, B.
name: Merlo, L.
name: Ramos, M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The neutral anomalies in $B$ decays are analysed in terms of the tree-level exchange of an axion-like-particle (ALP), within the effective field theory framework. The complete two-dimensional parameter space for ALP couplings to electrons and muons is explored. The solutions to $R_K$ and to the two energy bins of $R_{K^\ast}$ are confronted with the impact of ALP exchange on other observables (meson oscillations, leptonic and semileptonic decays of $B$ mesons including searches for new resonances, astrophysical constraints), as well as with the theoretical domain of validity of the effective theory. Solutions based on ALPs heavier than $B$ mesons, or lighter than twice the muon mass, are shown to be excluded. In contrast, the exchange of on-shell ALPs provides solutions to $R_K$ and/or $R_{K^\ast}$ within $2σ$ sensitivity which are technically compatible with those constraints. Furthermore, a ''golden ALP mass'' is identified at the frontier between the two energy bin windows of $R_{K^\ast}$, which could simultaneously explain these two $R_{K^\ast}$ anomalies together with $R_K$; this calls for the convenience of different energy binning which would easily clear up this (unlikely) possibility. The impact of smearing on data analysis is also discussed. When loop effects are taken into account, the solutions found can be in addition compatible with the data on the $g-2$ of the electron but not simultaneously with those on the $g-2$ of the muon. Furthermore, loop effects may require fine-tunings of some coupling values.
description: 50 pages, 15 figures
On the uniqueness of Schwarzschild-de Sitter spacetime
Creators: name: Borghini, Stefano
name: Chruściel, Piotr T.
name: Mazzieri, Lorenzo
Publisher: name: arXiv
Year: 2019
Subjects: subject: Differential Geometry (math.DG)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 26D10, 35B38, 58K05

description: We establish a new uniqueness theorem for the three dimensional Schwarzschild-de Sitter metrics. For this some new or improved tools are developed. These include a reverse Lojasiewicz inequality, which holds in a neighborhood of the extremal points of any smooth function. We further prove smoothness of the set of maxima of the lapse, whenever this set contains a topological hypersurface. This leads to a new strategy for the classification of well behaved static solutions of Einstein equations with a positive cosmological constant, based on the geometry of the maximum-set of the lapse.
description: 22 pages, 1 figure
The new SOXS instrument for the ESO NTT
Creators: name: Schipani, P.
name: Claudi, R.
name: Campana, S.
name: Baruffolo, A.
name: Basa, S.
name: Basso, S.
name: Cappellaro, E.
name: Cascone, E.
name: Cosentino, R.
name: DAlessio, F.
name: De Caprio, V.
name: Della Valle, M.
name: Postigo, A. de Ugarte
name: DOrsi, S.
name: Franzen, R.
name: Fynbo, J.
name: Gal-Yam, A.
name: Gardiol, D.
name: Giro, E.
name: Hamuy, M.
name: Iuzzolino, M.
name: Loreggia, D.
name: Mattila, S.
name: Munari, M.
name: Pignata, G.
name: Riva, M.
name: Savarese, S.
name: Schmidt, B.
name: Scuderi, S.
name: Smartt, S.
name: Vitali, F.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: SOXS (Son Of X-Shooter) will be a unique spectroscopic facility for the ESO-NTT 3.5-m telescope in La Silla (Chile), able to cover the optical/NIR band (350-1750 nm). The design foresees a high-efficiency spectrograph with a resolution-slit product of ~4,500, capable of simultaneously observing the complete spectral range 350 - 1750 nm with a good sensitivity, with light imaging capabilities in the visible band. This paper outlines the status of the project.
description: 10 pages, submitted to SPIE Astronomical Telescopes & Instrumentation 2016, paper 9908-152
Transition Waste Optimization for Coded Elastic Computing
Creators: name: Dau, Hoang
name: Gabrys, Ryan
name: Huang, Yu-Chih
name: Feng, Chen
name: Luu, Quang-Hung
name: Alzahrani, Eidah
name: Tari, Zahir
Publisher: name: arXiv
Year: 2019
Subjects: subject: Information Theory (cs.IT)
subject: Combinatorics (math.CO)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: Distributed computing, in which a resource-intensive task is divided into subtasks and distributed among different machines, plays a key role in solving large-scale problems. Coded computing is a recently emerging paradigm where redundancy for distributed computing is introduced to alleviate the impact of slow machines (stragglers) on the completion time. We investigate coded computing solutions over elastic resources, where the set of available machines may change in the middle of the computation. This is motivated by recently available services in the cloud computing industry (e.g., EC2 Spot, Azure Batch) where low-priority virtual machines are offered at a fraction of the price of the on-demand instances but can be preempted on short notice. Our contributions are three-fold. We first introduce a new concept called transition waste that quantifies the number of tasks existing machines must abandon or take over when a machine joins/leaves. We then develop an efficient method to minimize the transition waste for the cyclic task allocation scheme recently proposed in the literature (Yang et al. ISIT'19). Finally, we establish a novel solution based on finite geometry achieving zero transition wastes given that the number of active machines varies within a fixed range.
description: 24 pages, accepted by IEEE Transactions on Information Theory
Effective Data Mining Technique for Classification Cancers via Mutations in Gene using Neural Network
Creators: name: Ismaeel, Ayad Ghany
name: Mikhail, Dina Yousif
Publisher: name: arXiv
Year: 2016
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: The prediction plays the important role in detecting efficient protection and therapy of cancer. The prediction of mutations in gene needs a diagnostic and classification, which is based on the whole database (big dataset), to reach sufficient accuracy results. Since the tumor suppressor P53 is approximately about fifty percentage of all human tumors because mutations that occur in the TP53 gene into the cells. So, this paper is applied on tumor p53, where the problem is there are several primitive databases (excel database) contain datasets of TP53 gene with its tumor protein p53, these databases are rich datasets that cover all mutations and cause diseases (cancers). But these Data Bases cannot reach to predict and diagnosis cancers, i.e. the big datasets have not efficient Data Mining method, which can predict, diagnosis the mutation, and classify the cancer of patient. The goal of this paper to reach a Data Mining technique, that employs neural network, which bases on the big datasets. Also, offers friendly predictions, flexible, and effective classified cancers, in order to overcome the previous techniques drawbacks. This proposed technique is done by using two approaches, first, bioinformatics techniques by using BLAST, CLUSTALW, etc, in order to know if there are malignant mutations or not. The second, data mining by using neural network; it is selected (12) out of (53) TP53 gene database fields. To clarify, one of these 12 fields (gene location field) did not exists in TP53 gene database; therefore, it is added to the database of TP53 gene in training and testing back propagation algorithm, in order to classify specifically the types of cancers. Feed Forward Back Propagation supports this Data Mining method with data training rate (1) and Mean Square Error (MSE) (0.00000000000001). This effective technique allows in a quick, accurate and easy way to classify the type of cancer.
description: 8 pages, 8 figures, 1 Table
Supplementary figures of temperature and gene expression from Chronic social stress blunts core body temperature and molecular rhythms of Rbm3 and Cirbp in mouse lateral habenula
Creators: name: Haniffa, Salma
name: Narain, Priyam
name: Hughes, Michelle Ann
name: Petković, Aleksa
name: Šušić, Marko
name: Mlambo, Vongai
name: Chaudhury, Dipesh
Publisher: name: The Royal Society
Year: 2023
Subjects: subject: Neuroscience
classificationCode: 60114
subject: Systems Biology

description: Chronic social stress in mice causes behavioural and physiological changes that result in perturbed rhythms of body temperature, activity and sleep-wake cycle. To further understand the link between mood disorders and temperature rhythmicity in mice that are resilient or susceptible to stress, we measured core body temperature (Tcore) before and after exposure to chronic social defeat stress (CSDS). We found that Tcore amplitudes of stress-resilient and susceptible mice are dampened during exposure to CSDS. However, following CSDS, resilient mice recovered temperature amplitude faster than susceptible mice. Furthermore, the interdaily stability (IS) of temperature rhythms was fragmented in stress-exposed mice during CSDS, which recovered to control levels following stress. There were minimal changes in locomotor activity after stress exposure which correlates with regular rhythmic expression of Prok2 - an output signal of the suprachiasmatic nucleus. We also determined that expression of thermosensitive genes Rbm3 and Cirbp in the lateral habenula (LHb) were blunted 1-day after CSDS. Rhythmic expression of these genes recovered 10 days later. Overall, we show that CSDS blunts Tcore and thermosensitive gene rhythms. Tcore rhythm recovery is faster in stress-resilient mice, but Rbm3 and Cirbp recovery is uniform across the phenotypes.
MPEC 2023-S29 : DAILY ORBIT UPDATE (2023 September 17)
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
How Broad is a Neutrino?
Creators: name: Banks, Hannah
name: Kelly, Kevin J.
name: McCullough, Matthew
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Canonical neutrino oscillations arise due to the propagation of three mass eigenstates from production to detection. We aspire to capture, in one simple framework, a broad range of new physics effects on neutrino propagation beyond this canonical picture - this can be done by promoting the neutrino propagators to the general Källén-Lehmann form. In this work we demonstrate how models predicting additional light propagating species of neutrino are naturally accommodated in this language and propose a simple model spectrum composed of just three `broadened' states as a flexible ansatz by which to explore the phenomenology of new physics in neutrino propagation. Reinterpreting existing neutrino oscillation measurements, we illustrate how this framework provides the capacity to probe deviations from the standard three-neutrino scenario systematically and generally. Whilst current data allows for relatively strong constraints on broadened neutrinos, we find the upcoming JUNO experiment will yield significant improvements, particularly for the heaviest neutrino, paving the way to a clearer understanding of how neutrinos propagate in vacuum.
description: 27 pages, 10 figures
Gate voltage control of the $AlO_x$/$SrTiO_3$ interface electrical properties
Creators: name: Delahaye, Julien
name: Grenet, Thierry
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Electron-beam deposition of an insulating granular aluminium or of an off-stoichiometric amorphous alumina layer on a $SrTiO_3$ surface is a simple way to get a metallic interface from insulating materials. No heating nor specific preparation of the $SrTiO_3$ surface are needed. In this paper, we investigate how the electrical properties of this interface can be tuned by the use of a back gate voltage (electrical field through the $SrTiO_3$ substrate). We demonstrate that the slow field-effect observed at room temperature can be used to tune reversibly and in a controlled way the low temperature electrical properties of the interface. In particular, important parameters of a transistor such as the amplitude of the resistance response to gate voltage changes or the existence of an "on" or an "off" state at zero gate voltage and at low temperature can be adjusted in a single sample. This method should be applicable to any $SrTiO_3$-based interface in which oxygen vacancies are involved and might provide a powerful way to study the metal or superconductor insulator transition observed in such systems.
description: 16 pages
Economics of tobacco control and an assessment of the regulated market model : normative frameworks for and a qualitative assessment of the tobacco market
Creators: name: Otim, Michael E.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
On the discrepancy of random subsequences of $\{nα\}$
Creators: name: Berkes, Istvan
name: Borda, Bence
Publisher: name: arXiv
Year: 2019
Subjects: subject: Number Theory (math.NT)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 11K38, 11L07, 11J70, 60G50

description: For irrational $α$, $\{nα\}$ is uniformly distributed mod 1 in the Weyl sense, and the asymptotic behavior of its discrepancy is completely known. In contrast, very few precise results exist for the discrepancy of subsequences $\{n_k α\}$, with the exception of metric results for exponentially growing $(n_k)$. It is therefore natural to consider random $(n_k)$, and in this paper we give nearly optimal bounds for the discrepancy of $\{n_k α\}$ in the case when the gaps $n_{k+1}-n_k$ are independent, identically distributed, integer-valued random variables. As we will see, the discrepancy behavior is determined by a delicate interplay between the distribution of the gaps $n_{k+1}-n_k$ and the rational approximation properties of $α$. We also point out an interesting critical phenomenon, a sudden change of the order of magnitude of the discrepancy of $\{n_k α\}$ as the Diophantine type of $α$ passes through a certain critical value.
description: 30 pages
RIS-Aided MIMO Systems with Hardware Impairments: Robust Beamforming Design and Analysis
Creators: name: Wang, Jintao
name: Gong, Shiqi
name: Wu, Qingqing
name: Ma, Shaodan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Information Theory (cs.IT)
subject: Signal Processing (eess.SP)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Reconfigurable intelligent surface (RIS) has been anticipated to be a novel cost-effective technology to improve the performance of future wireless systems. In this paper, we investigate a practical RIS-aided multiple-input-multiple-output (MIMO) system in the presence of transceiver hardware impairments, RIS phase noise and imperfect channel state information (CSI). Joint design of the MIMO transceiver and RIS reflection matrix to minimize the total average mean-square-error (MSE) of all data streams is particularly considered. This joint design problem is non-convex and challenging to solve due to the newly considered practical imperfections. To tackle the issue, we first analyze the total average MSE by incorporating the impacts of the above system imperfections. Then, in order to handle the tightly coupled optimization variables and non-convex NP-hard constraints, an efficient iterative algorithm based on alternating optimization (AO) framework is proposed with guaranteed convergence, where each subproblem admits a closed-form optimal solution by leveraging the majorization-minimization (MM) technique. Moreover, via exploiting the special structure of the unit-modulus constraints, we propose a modified Riemannian gradient ascent (RGA) algorithm for the discrete RIS phase shift optimization. Furthermore, the optimality of the proposed algorithm is validated under line-of-sight (LoS) channel conditions, and the irreducible MSE floor effect induced by imperfections of both hardware and CSI is also revealed in the high signal-to-noise ratio (SNR) regime. Numerical results show the superior MSE performance of our proposed algorithm over the adopted benchmark schemes, and demonstrate that increasing the number of RIS elements is not always beneficial under the above system imperfections.
description: 16 pages, 6 figures. Accepted by IEEE Transactions on Wireless Communications
O primeiro hemistíquio do versículo quarto do prólogo de S. João na doutrina de Santo Agostinho
Creators: name: Oliveira, Américo Do Couto
Publisher: name: Theologica
Year: 1958

description: Theologica, v. 2 n. 1-2 (1958): Volume 2 (I série) n. 1-2 (1958-1965)
Desvendando o Direito de Marcas: Uma Perspectiva Econômica - Resumo Comentado do Artigo de Landes e Posner
Creators: name: , Baptista
Publisher: name: Zenodo
Year: 2021

description: O artigo aborda a economia das marcas, explorando sua relação com outras formas de propriedade intelectual e examinando conceitos da economia da linguagem e comunicação. A discussão enfoca a doutrina do direito das marcas, considerando a eficiência e ineficiência do sistema de proteção. Marcas, como signos distintivos, comunicam informações sobre origem e qualidade de produtos, reduzindo custos de pesquisa para consumidores. O registro de marcas gera incentivos para manter qualidade consistente, enquanto neologismos enriquecem a comunicação. O texto discute tipos de marcas, desafios de nomes genéricos, diluição e confusão. Explora a relação entre marcas e custos de pesquisa, competição, proteção territorial e mercadológica, assim como a necessidade de proteção anti-diluição. Enfatiza que o estudo das relações econômicas e a análise de dispositivos de proteção são cruciais para avaliar a eficiência do mercado e desenvolver estratégias corretivas.
MeV electron acceleration at 1 kHz with <10mJ laser pulses
Creators: name: Salehi, F.
name: Goers, A. J.
name: Hine, G. A.
name: Feder, L.
name: Kuk, D.
name: Miao, B.
name: Woodbury, D.
name: Kim, K. Y.
name: Milchberg, H. M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We demonstrate laser driven acceleration of electrons to MeV-scale energies at 1kHz repetition rate using <10mJ pulses focused on near-critical density He and H2 gas jets. Using the H2 gas jet, electron acceleration to ~0.5MeV in ~10fC bunches was observed with laser pulse energy as low as 1.3mJ. Increasing the pulse energy to 10mJ, we measure ~1pC charge bunches with >1MeV energy for both He and H2 gas jets.
On the contribution of work or heat in exchanged energy via interaction in open bipartite quantum systems
Creators: name: Ahmadi, B.
name: Salimi, S.
name: Khorashad, A. S.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this paper, unambiguous redefinitions of heat and work are presented for quantum thermodynamic systems. We will use genuine reasoning based on which Clausius originally defined work and heat in establishing thermodynamics. The change in the energy which is accompanied by a change in the entropy is identified as heat, while any change in the energy which does not lead to a change in the entropy is known as work. It will be seen that quantum coherence does not allow all the energy exchanged between two quantum systems to be only of the heat form. Several examples will also be discussed. Finally, it will be shown that these refined definitions will strongly affect the entropy production of quantum thermodynamic processes giving new insight into the irreversibility of quantum processes.
description: 7 pages, 5 figures
A Proposal for Semantic Map Representation and Evaluation
Creators: name: Capobianco, Roberto
name: Serafin, Jacopo
name: Dichtl, Johann
name: Grisetti, Giorgio
name: Iocchi, Luca
name: Nardi, Daniele
Publisher: name: arXiv
Year: 2016
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Semantic mapping is the incremental process of "mapping" relevant information of the world (i.e., spatial information, temporal events, agents and actions) to a formal description supported by a reasoning engine. Current research focuses on learning the semantic of environments based on their spatial location, geometry and appearance. Many methods to tackle this problem have been proposed, but the lack of a uniform representation, as well as standard benchmarking suites, prevents their direct comparison. In this paper, we propose a standardization in the representation of semantic maps, by defining an easily extensible formalism to be used on top of metric maps of the environments. Based on this, we describe the procedure to build a dataset (based on real sensor data) for benchmarking semantic mapping techniques, also hypothesizing some possible evaluation metrics. Nevertheless, by providing a tool for the construction of a semantic map ground truth, we aim at the contribution of the scientific community in acquiring data for populating the dataset.
Headline news : a semi-strong form efficiency test of Australian interest rate futures and options market
Creators: name: Bowes, Christian.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Detecting cosmological gravitational waves background after removal of compact binary coalescences in future gravitational wave detectors
Creators: name: Zhong, Haowen
name: Ormiston, Rich
name: Mandic, Vuk
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The improved sensitivity of third generation gravitational wave detectors opens the possibility of detecting the primordial cosmological stochastic gravitational wave background (SGWB). Detection of the cosmological SGWB is facing a novel challenge: it will likely be masked by the foreground generated by a large number of coalescences of compact binary systems consisting of black holes and/or neutron stars. In this paper, we investigate the possibility of reducing this foreground by removing (notching) the individually resolved compact binary signals in time-frequency space. We establish that such an approach could be used to reach the SGWB sensitivity floor defined by the unresolved part of the compact binaries foreground, which we find to be between $Ω_{\rm GW} \sim (9.1 \times10^{-12} - 8.6\times10^{-11})$ for a frequency independent energy density spectrum and depending on the rate of coalescing binary neutron star systems. Since third-generation gravitational wave detectors will not be able to resolve all compact binaries, the unresolvable component of the compact binaries foreground may limit the SGWB searches with these detectors.
description: 8 pages, 2 figures, 1 table
Manejos soviéticos na Ásia - Nicolau Belina-Podgaetsky, in Brotéria, 5 (1594), págs. 552-559
Creators: name: Redação, A
Publisher: name: Theologica
Year: 1958

description: Theologica, v. 2 n. 1-2 (1958): Volume 2 (I série) n. 1-2 (1958-1965)
A propaganda ateísta e as peregrinações religiosas da U.R.S.S. - Nicolau Belina- Podgaehk, in Brotéria. LVIII (1954), págs 464-472
Creators: name: Redação, A
Publisher: name: Theologica
Year: 1958

description: Theologica, v. 2 n. 1-2 (1958): Volume 2 (I série) n. 1-2 (1958-1965)
Pulse length effects in long wavelength driven non-sequential double ionization
Creators: name: Jiang, H.
name: Mandrysz, M.
name: Sanchez, A.
name: Dura, J.
name: Steinle, T.
name: Prauzner-Bechcicki, J. S.
name: Zakrzewski, J.
name: Lewenstein, M.
name: He, F.
name: Biegert, J.
name: Ciappina, M. F.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present a joint experimental and theoretical study of non-sequential double ionization (NSDI) in argon driven by a 3100-nm laser source. The correlated photoelectron momentum distribution (PMD) shows a strong dependence on the pulse duration, and the evolution of the PMD can be explained by an envelope-induced intensity effect. Determined by the time difference between tunneling and rescattering, the laser vector potential at the ionization time of the bound electron will be influenced by the pulse duration, leading to different drift momenta. Such a mechanism is extracted through a classical trajectory Monte Carlo-based model and it can be further confirmed by quantum mechanical simulations. This work sheds light on the importance of the pulse duration in NSDI and improves our understanding of the strong field tunnel-recollision dynamics under mid-IR laser fields.
description: 19 pages, 9 figures, submitted to NJP, comments are welcomed
A Classification of Semeai with Approach Moves
Creators: name: Wolf, Thomas
Publisher: name: arXiv
Year: 2016
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: I.2.1

description: The paper analyzes liberty races (semeai) in the game of Go. A rigorous treatment of positions with approach moves but no ko revealed a class of positions not described in the literature before. The complete presented classification is simpler and more compact than the one used so far. This was achieved through a classification by the types of liberties and the order they are to be filled instead of a classification by group status. A principal difference to semeai without approach moves is that in the presence of approach moves and shared liberties and the absence of eyes, two different strategies are possible because the un-orthodox filling of shared liberties instead of outer liberties may be a better strategy.
description: 19 pages
BNS Invariants and Algebraic Fibrations of Group Extensions
Creators: name: Friedl, Stefan
name: Vidussi, Stefano
Publisher: name: arXiv
Year: 2019
Subjects: subject: Geometric Topology (math.GT)
subject: Group Theory (math.GR)
subject: FOS: Mathematics

description: Let $G$ be a finitely generated group that can be written as an extension \[ 1 \longrightarrow K \stackrel{i}{\longrightarrow} G \stackrel{f}{\longrightarrow} Γ\longrightarrow 1 \] where $K$ is a finitely generated group. By a study of the BNS invariants we prove that if $b_1(G) > b_1(Γ) > 0$, then $G$ algebraically fibers, i.e. admits an epimorphism to $\Bbb{Z}$ with finitely generated kernel. An interesting case of this occurrence is when $G$ is the fundamental group of a surface bundle over a surface $F \hookrightarrow X \rightarrow B$ with Albanese dimension $a(X) = 2$. As an application, we show that if $X$ has virtual Albanese dimension $va(X) = 2$ and base and fiber have genus greater that $1$, $G$ is noncoherent. This answers for a broad class of bundles a question of J. Hillman.
description: Final version, with some typo corrected. To appear in J. Inst. Math. Jussieu
Li-Yorke sensitive and weak mixing dynamical systems
Creators: name: Mlíchová, Michaela
Publisher: name: arXiv
Year: 2016
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: Akin and Kolyada in 2003 [E. Akin, S. Kolyada, Li-Yorke sensitivity, Nonlinearity 16 (2003) 1421 - 1433] introduced the notion of Li-Yorke sensitivity. They proved that every weak mixing system $(X, T)$, where $X$ is a compact metric space and $T$ a continuous map of $X$ is Li-Yorke sensitive. An example of Li-Yorke sensitive system without weak mixing factors was given in [M. Čiklová, Li-Yorke sensitive minimal maps, Nonlinearity 19 (2006) 517 - 529] (see also [M. Čiklová-Ml\'ıchová, Li-Yorke sensitive minimal maps II, Nonlinearity 22 (2009) 1569 -1573]). In their paper, Akin and Kolyada conjectured that every minimal system with a weak mixing factor, is Li-Yorke sensitive. We provide arguments supporting this conjecture though the proof seems to be difficult.
MPEC 2023-S30 : 2023 RZ15
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2023 RZ15

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
A fully-discrete virtual element method for the nonstationary Boussinesq equations
Creators: name: da Veiga, L. Beirão
name: Mora, D.
name: Silgado, A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 65M12, 65M15, 65M60, 76D05

description: In the present work we propose and analyze a fully coupled virtual element method of high order for solving the two dimensional nonstationary Boussinesq system in terms of the stream-function and temperature fields. The discretization for the spatial variables is based on the coupling $C^1$- and $C^0$-conforming virtual element approaches, while a backward Euler scheme is employed for the temporal variable. Well-posedness and unconditional stability of the fully-discrete problem is provided. Moreover, error estimates in $H^2$- and $H^1$-norms are derived for the stream-function and temperature, respectively. Finally, a set of benchmark tests are reported to confirm the theoretical error bounds and illustrate the behavior of the fully-discrete scheme.
La Philosophie Augustinienne - F. J. Thonnard, A. A. in 'L'année Théologique Augustinienne., III (1955), 280
Creators: name: Redação, A
Publisher: name: Theologica
Year: 1958

description: Theologica, v. 2 n. 1-2 (1958): Volume 2 (I série) n. 1-2 (1958-1965)
Magnetic phases and unusual topological electronic structures of Weyl semimetals in strong interaction limit
Creators: name: Zhai, Liang-Jun
name: Chou, Po-Hao
name: Mou, Chung-Yu
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The interplay of electronic band structures and electron-electron interactions is known to brew new phases in condensed matter. In this paper, we investigate thermodynamic phases and corresponding electronic structures of the Weyl semimetal in the strong onsite Coulomb interaction limit. Based on a minimum model of the Weyl semimetal with two linear Weyl nodes, it is shown that generically the Weyl semimetal becomes magnetic in the presence of interactions. In particular, it is shown that the Dzyaloshinskii-Moriya exchange interaction is generally induced so that the A-type antiferromagnetic (A-AFM) phase and the spiral spin density wave (SSDW) states are two generic phases. Furthermore, we find that Weyl nodes proliferate and it is possible to doubly enhance the unusual properties of non-interacting Weyl semimetals through the realization of double-Weyl nodes in strong correlation limit. Specifically, it is shown that in the SSDW phase, linear Weyl nodes are tuned into double-Weyl nodes with the corresponding charges being $\pm 2$. As the spin-orbit coupling increases, a quantum phase transition occurs with the SSDW phase being turned into an A-AFM phase and at the same time, double-Weyl nodes are disintegrated into two pairs of linear Weyl nodes. Our results reveal the unusual interplay between the topology of electronic structures and magnetism in strongly correlated phases of Weyl semimetals.
description: 19 pages, 7 figure, to appear in Phys. Rev. B
Naive-commutative structure on rational equivariant $K$-theory for abelian groups
Creators: name: Bohmann, Anna Marie
name: Hazel, Christy
name: Ishak, Jocelyne
name: Kędziorek, Magdalena
name: May, Clover
Publisher: name: arXiv
Year: 2020
Subjects: subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics
subject: 55P91 (Primary) 55P62, 19L47, 55P43 (Secondary)

description: In this paper, we calculate the image of the connective and periodic rational equivariant complex $K$-theory spectrum in the algebraic model for naive-commutative ring $G$-spectra given by Barnes, Greenlees and Kędziorek for finite abelian $G$. Our calculations show that these spectra are unique as naive-commutative ring spectra in the sense that they are determined up to weak equivalence by their homotopy groups. We further deduce a structure theorem for module spectra over rational equivariant complex $K$-theory.
description: 19 pages
Statistical Equilibrium of Circulating Fluids
Creators: name: Migdal, Alexander
Publisher: name: arXiv
Year: 2022
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Chaotic Dynamics (nlin.CD)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We are investigating the inviscid limit of the Navier-Stokes equation, and we find previously unknown anomalous terms in Hamiltonian, Dissipation, and Helicity, which survive this limit and define the turbulent statistics. We find various topologically nontrivial configurations of the confined Clebsch field responsible for vortex sheets and lines. In particular, a stable vortex sheet family is discovered, but its anomalous dissipation vanishes as $\sqrtν$. Topologically stable stationary singular flows, which we call Kelvinons, are introduced. They have a conserved velocity circulation $Γ_α$ around the loop $C$ and another one $Γ_β$ for an infinitesimal closed loop $\tilde C$ encircling $C$, leading to a finite helicity. The anomalous dissipation has a finite limit, which we computed analytically. The Kelvinon is responsible for asymptotic PDF tails of velocity circulation, \textbf{perfectly matching numerical simulations}. The loop equation for circulation PDF as functional of the loop shape is derived and studied. This equation is \textbf{exactly} equivalent to the Schrödinger equation in loop space, with viscosity $ν$ playing the role of Planck's constant. Kelvinons are fixed points of the loop equation at WKB limit $ν\rightarrow 0$. The anomalous Hamiltonian for the Kelvinons contains a large parameter $\log \frac{|Γ_β|}ν$. The leading powers of this parameter can be summed up, leading to familiar asymptotic freedom, like in QCD. In particular, the so-called multifractal scaling laws are, as in QCD, modified by the powers of the logarithm.
description: 246 pages, 96 figures, and six appendixes. Submitted to Physics Reports. This version matches the final printed version of Phys. Rep. paper