cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
FlowTransformer: A Transformer Framework for Flow-based Network Intrusion Detection Systems
Creators: name: Manocchio, Liam Daly
name: Layeghy, Siamak
name: Lo, Wai Weng
name: Kulatilleke, Gayan K.
name: Sarhan, Mohanad
name: Portmann, Marius
Publisher: name: arXiv
Year: 2023
Subjects: subject: Cryptography and Security (cs.CR)
subject: Artificial Intelligence (cs.AI)
subject: Computation and Language (cs.CL)
subject: Neural and Evolutionary Computing (cs.NE)
subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: This paper presents the FlowTransformer framework, a novel approach for implementing transformer-based Network Intrusion Detection Systems (NIDSs). FlowTransformer leverages the strengths of transformer models in identifying the long-term behaviour and characteristics of networks, which are often overlooked by most existing NIDSs. By capturing these complex patterns in network traffic, FlowTransformer offers a flexible and efficient tool for researchers and practitioners in the cybersecurity community who are seeking to implement NIDSs using transformer-based models. FlowTransformer allows the direct substitution of various transformer components, including the input encoding, transformer, classification head, and the evaluation of these across any flow-based network dataset. To demonstrate the effectiveness and efficiency of the FlowTransformer framework, we utilise it to provide an extensive evaluation of various common transformer architectures, such as GPT 2.0 and BERT, on three commonly used public NIDS benchmark datasets. We provide results for accuracy, model size and speed. A key finding of our evaluation is that the choice of classification head has the most significant impact on the model performance. Surprisingly, Global Average Pooling, which is commonly used in text classification, performs very poorly in the context of NIDS. In addition, we show that model size can be reduced by over 50\%, and inference and training times improved, with no loss of accuracy, by making specific choices of input encoding and classification head instead of other commonly used alternatives.
Gauge Invariant Lagrangian Formulations for Mixed Symmetry Higher Spin Bosonic Fields in AdS Spaces
Creators: name: Reshetnyak, A.
name: Moshin, P.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Representation Theory (math.RT)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: G.0; I.1.1
subject: 81T11 17A45 17B10 22E47

description: We deduce a non-linear commutator higher-spin (HS) symmetry algebra which encodes unitary irreducible representations of the AdS group -- subject to a Young tableaux $Y(s_1,\ldots ,s_k)$ with $k\geq 2$ rows -- in a $d$-dimensional anti-de-Sitter space. Auxiliary representations for a deformed non-linear HS symmetry algebra in terms of a generalized Verma module, as applied to additively convert a subsystem of second-class constraints in the HS symmetry algebra into one with first-class constraints, are found explicitly in the case of a $k=2$ Young tableaux. An oscillator realization over the Heisenberg algebra for the Verma module is constructed. The results generalize the method of constructing auxiliary representations for the symplectic $sp(2k)$ algebra used for mixed-symmetry HS fields in flat spaces \cite{BRbos}. Polynomial deformations of the $su(1,1)$ algebra related to the Bethe ansatz are studied as a by-product. A nilpotent BRST operator for a non-linear HS symmetry algebra of the converted constraints for $Y(s_1, s_2)$ is found, with non-vanishing terms (resolving the Jacobi identities) of third order in powers of ghost coordinates. A gauge-invariant unconstrained reducible Lagrangian formulation for a free bosonic HS field of generalized spin $(s_1,s_2)$ is deduced. Following the results of \cite{BuchbinderReshetnyak, BRmasscub}, we develop a BRST approach to constructing general off-shell local cubic interaction vertices for irreducible massive higher-spin fields (being candidates for massive particles in the Dark Matter problem). A new reducible gauge-invariant Lagrangian formulation for an antisymmetric massive tensor field of spin $(1,1)$ is obtained.
description: 71 pages, 1 figure, presentation clarified and improved, relation to Cosmology and 11 references added; elaborated and developed conference paper [arXiv:1111.5516[hep-th]], published version in Universe
Impact of MBE-grown (In,Ga)As/GaAs metamorphic buffers on excitonic and optical properties of single quantum dots with single-photon emission tuned to the telecom range
Creators: name: Wyborski, Paweł
name: Gawełczyk, Michał
name: Podemski, Paweł
name: Wroński, Piotr Andrzej
name: Pawlyta, Mirosława
name: Gorantla, Sandeep
name: Jabeen, Fauzia
name: Höfling, Sven
name: Sęk, Grzegorz
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Tuning GaAs-based quantum emitters to telecom wavelengths makes it possible to use the existing mature technology for applications in, e.g., long-haul ultra-secure communication in the fiber networks. A promising method re-developed recently is to use a metamorphic InGaAs buffer that redshifts the emission by reducing strain. However, the impact of such a buffer causes also a simultaneous modification of other quantum dot properties. Knowledge of these effects is crucial for actual implementations of QD-based non-classical light sources for quantum communication schemes. Here, we thoroughly study single GaAs-based quantum dots grown by molecular-beam epitaxy on specially designed, digital-alloy InGaAs metamorphic buffers. With a set of structures varying in the buffer indium content and providing quantum dot emission through the telecom spectral range up to 1.6 $μ$m, we analyze the impact of the buffer and its composition on QD structural and optical properties. We identify the mechanisms of quantum dot emission shift with varying buffer composition. We also look into the charge trapping processes and compare excitonic properties for different growth conditions with single-dot emission successfully shifted to both, the second and the third telecom windows.
description: 20 pages, 9 figures
A tensor instability in the Eddington inspired Born-Infeld Theory of Gravity
Creators: name: Escamilla-Rivera, Celia
name: Banados, Maximo
name: Ferreira, Pedro G.
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: In this paper we consider an extension to Eddington's proposal for the gravitational action. We study tensor perturbations of a homogeneous and isotropic space-time in the Eddington regime, where modifications to Einstein gravity are strong. We find that the tensor mode is linearly unstable deep in the Eddington regime and discuss its cosmological implications.
description: 5 pages, approved by Phys. Rev. D, additional references and minor modifications
Coli-Conc Report 3: A Novel Approach To Terminology Mappings
Creators: name: Voß, Jakob
Publisher: name: Zenodo
Year: 2016
Subjects: subject: kos
subject: knowledge organization systems
subject: mappings
subject: concordances
subject: http://www.wikidata.org/entity/Q6423319
subject: http://www.wikidata.org/entity/Q1141303

description: This report introduces a novel approach to manage a very large number of mappings between any kind of knowledge organization systems.
description: {"references": ["Binding, Ceri, and Douglas Tudhope. 2015. \"Improving Interoperability Using Vocabulary Linked Data.\" International Journal on Digital Libraries 17 (1): 5\u201321. doi:10.1007/s00799-015-0166-y.", "ISO, ed. 2013. Information and Documentation: Thesauri and Interoperability with Other Vocabularies. Part 2: Interoperability with Other Vocabularies. ISO 25964-2.", "Mayr, Philipp, and Vivien Petras. 2008. \"Building a Terminology Network for Search: The KoMoHe Project.\" ArXiv:0808.0518 [Cs], August. http://arxiv.org/abs/0808.0518.", "Nakamoto, Satoshi. 2008. \"Bitcoin: A Peer-to-Peer Electronic Cash System.\" https://bitcoin.org/bitcoin.pdf.", "Shaw, Ryan. 2015. \"Big Data and Reality.\" Big Data & Society 2 (2). doi:10.1177/2053951715608877.", "Soergel, Dagobert. 2011. \"Conceptual Foundations for Semantic Mapping and Semantic Search.\" In Concepts in Context: Proceedings of the Cologne Conference on Interoperability and Semantics in Knowledge Organization, July 19th-20th, 2010, edited by Felix Boteram, Winfried G\u00f6dert, and Jessica Hubrich, 13\u201335. W\u00fcrzburg: Ergon."]}
Fourier Transform Scanning Tunneling Spectroscopy: the possibility to obtain constant energy maps and the band dispersion using a local measurement
Creators: name: Simon, L.
name: Bena, C.
name: Vonau, F.
name: Cranney, M.
name: Aubel, D.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We present here an overview of the Fourier Transform Scanning Tunneling spectroscopy technique (FT-STS). This technique allows one to probe the electronic properties of a two-dimensional system by analyzing the standing waves formed in the vicinity of defects. We review both the experimental and theoretical aspects of this approach, basing our analysis on some of our previous results, as well as on other results described in the literature. We explain how the topology of the constant energy maps can be deduced from the FT of dI/dV map images which exhibit standing waves patterns. We show that not only the position of the features observed in the FT maps, but also their shape can be explained using different theoretical models of different levels of approximation. Thus, starting with the classical and well known expression of the Lindhard susceptibility which describes the screening of electron in a free electron gas, we show that from the momentum dependence of the susceptibility we can deduce the topology of the constant energy maps in a joint density of states approximation (JDOS). We describe how some of the specific features predicted by the JDOS are (or are not) observed experimentally in the FT maps. The role of the phase factors which are neglected in the rough JDOS approximation is described using the stationary phase conditions. We present also the technique of the T-matrix approximation, which takes into account accurately these phase factors. This technique has been successfully applied to normal metals, as well as to systems with more complicated constant energy contours. We present results recently obtained on graphene systems which demonstrate the power of this technique, and the usefulness of local measurements for determining the band structure, the map of the Fermi energy and the constant-energy maps.
description: 33 pages, 15 figures; invited review article, to appear in Journal of Physics D: Applied Physics
Supplementary Material: Additional simulations and extended model equations from Assessing the impact of widespread respirator use in curtailing COVID-19 transmission in the USA
Creators: name: Ngonghala, Calistus N.
name: Knitter, James R.
name: Marinacci, Lucas
name: Bonds, Matthew H.
name: Gumel, Abba B.
Publisher: name: The Royal Society
Year: 2021
Subjects: subject: Health Care
subject: Diseases
subject: 111706 Epidemiology
subject: FOS: Health sciences
subject: 10202 Biological Mathematics
subject: FOS: Mathematics
subject: 19999 Mathematical Sciences not elsewhere classified

description: Dynamic models are used to assess the impact of three types of face masks—cloth masks, surgical/procedure masks and respirators—in controlling the COVID-19 pandemic in the USA. We showed that the pandemic would have failed to establish in the USA if a nationwide mask mandate, based on using respirators with moderately high compliance, had been implemented during the first two months of the pandemic. The other mask types would fail to prevent the pandemic from becoming established. When mask usage compliance is low to moderate, respirators are far more effective in reducing disease burden. Using data from the third wave, we showed that the epidemic could be eliminated in the USA if at least 40% of the population consistently wore respirators in public. Surgical masks can also lead to elimination, but requires compliance of at least 55%. Daily COVID-19 mortality could be eliminated in the USA by June or July 2021 if 95% of the population opted for either respirators or surgical masks from the beginning of the third wave. We showed that the prospect of effective control or elimination of the pandemic using mask-based strategy is greatly enhanced if combined with other non-pharmaceutical interventions (NPIs) that significantly reduce the baseline community transmission. By slightly modifying the model to include the effect of a vaccine against COVID-19 and waning vaccine-derived and natural immunity, this study shows that the waning of such immunity could trigger multiple new waves of the pandemic in the USA. The number, severity and duration of the projected waves depend on the quality of mask type used and the level of increase in the baseline levels of other NPIs used in the community during the onset of the third wave of the pandemic in the USA. Specifically, no severe fourth or subsequent wave of the pandemic will be recorded in the USA if surgical masks or respirators are used, particularly if the mask-use strategy is combined with an increase in the baseline levels of other NPIs. This study further emphasizes the role of human behaviour towards masking on COVID-19 burden, and highlights the urgent need to maintain a healthy stockpile of highly effective respiratory protection, particularly respirators, to be made available to the general public in times of future outbreaks or pandemics of respiratory diseases that inflict severe public health and socio-economic burden on the population.
Rda Wheat Data Interoperability Working Group Outputs
Creators: name: Dzalé Yeumo, Esther
Publisher: name: Zenodo
Year: 2016
Subjects: Wheat data interoperability

description: This is a presentation of the RDA Wheat data interoperability wg group delivered during the RDA plenary in Tokyo in March 2016. The guidelines are available on http://datastandards.wheatis.org
Reducing Idleness in Financial Cloud Services via Multi-objective Evolutionary Reinforcement Learning based Load Balancer
Creators: name: Yang, Peng
name: Zhang, Laoming
name: Liu, Haifeng
name: Li, Guiying
Publisher: name: arXiv
Year: 2023
Subjects: subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Computer and information sciences

description: In recent years, various companies have started to shift their data services from traditional data centers to the cloud. One of the major motivations is to save on operational costs with the aid of cloud elasticity. This paper discusses an emerging need from financial services to reduce the incidence of idle servers retaining very few user connections, without disconnecting them from the server side. This paper considers this need as a bi-objective online load balancing problem. A neural network based scalable policy is designed to route user requests to varied numbers of servers for the required elasticity. An evolutionary multi-objective training framework is proposed to optimize the weights of the policy. Not only is the new objective of idleness is reduced by over 130% more than traditional industrial solutions, but the original load balancing objective itself is also slightly improved. Extensive simulations with both synthetic and real-world data help reveal the detailed applicability of the proposed method to the emergent problem of reducing idleness in financial services.
description: 20 pages, 14 figures
Topological monoids of monotone injective partial selfmaps of $\mathbb{N}$ with cofinite domain and image
Creators: name: Gutik, Oleg
name: Repovš, Dušan
Publisher: name: arXiv
Year: 2011
Subjects: subject: General Topology (math.GN)
subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 22A15, 20M20, 20M18, 54H15

description: In this paper we study the semigroup $\mathscr{I}_{\infty}^{\nearrow}(\mathbb{N})$ of partial cofinal monotone bijective transformations of the set of positive integers $\mathbb{N}$. We show that the semigroup $\mathscr{I}_{\infty}^{\nearrow}(\mathbb{N})$ has algebraic properties similar to the bicyclic semigroup: it is bisimple and all of its non-trivial group homomorphisms are either isomorphisms or group homomorphisms. We also prove that every locally compact topology $τ$ on $\mathscr{I}_{\infty}^{\nearrow}(\mathbb{N})$ such that $(\mathscr{I}_{\infty}^{\nearrow}(\mathbb{N}),τ)$ is a topological inverse semigroup, is discrete. Finally, we describe the closure of $(\mathscr{I}_{\infty}^{\nearrow}(\mathbb{N}),τ)$ in a topological semigroup.
Blind identification of Ambisonic reduced room impulse response
Creators: name: Kitić, Srđan
name: Daniel, Jérôme
Publisher: name: arXiv
Year: 2023
Subjects: subject: Audio and Speech Processing (eess.AS)
subject: Sound (cs.SD)
subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Recently proposed Generalized Time-domain Velocity Vector (GTVV) is a generalization of relative room impulse response in spherical harmonic (aka Ambisonic) domain that allows for blind estimation of early-echo parameters: the directions and relative delays of individual reflections. However, the derived closed-form expression of GTVV mandates few assumptions to hold, most important being that the impulse response of the reference signal needs to be a minimum-phase filter. In practice, the reference is obtained by spatial filtering towards the Direction-of-Arrival of the source, and the aforementioned condition is bounded by the performance of the applied beamformer (and thus, by the Ambisonic array order). In the present work, we suggest to circumvent this problem by directly modeling the impulse responses constituting the GTVV time series, which permits not only to relax the initial assumptions, but also to extract the information therein in a more consistent and efficient manner, entering the realm of blind system identification. Experiments using measured room impulse responses confirm the effectiveness of the proposed approach.
description: Accepted for publication at the IEEE/ACM Transactions on Audio, Speech, and Language Processing
Netzwerkvisualisierung. Anmerkungen Zur Visuellen Kultur Der Historischen Netzwerkforschung
Creators: name: Mayer, Katja
Publisher: name: Zenodo
Year: 2016
Subjects: social network analysis
visualization
practices
visual literacy
visual history
scientific imaging

description: Besonders in den letzten Jahren häufen sich die Auftritte von mehr oder weniger ausgestalteten Netzwerkvisualisierungen in Zeitschriften und Konferenzen im Kontext der social network analysis; auch in den Massenmedien und sogar in der Werbung tummeln sich solche Diagramme. Man trifft inzwischen auf eine Heerschar von netzwerkanalytischen Computerprogrammen, die mit mächtigen Visualisierungswerkzeugen ausgestattet sind. Der vorliegende Artikel will einige Aspekte aus der Praxis der Netzwerkvisualisierung im Forschungsalltag herausgreifen, um zu demonstrieren, wie sehr die Herstellung und Darstellung von Wissen miteinander verknüpft sind. Die Visualisierung historischer sozialer Netzwerke erfordert neben spezifischem technischen Wissen visuelle Kompetenz, also die Bereitschaft, sich mit der epistemologischen Tragweite des Netzwerkzeichnens auseinanderzusetzen. Daraus resultiert die reflexive Hinwendung zu den Produktionsbedingungen von Netzwerkdiagrammen und der den Artikel beschließende Appell, die historische Netzwerkforschung auch als visual history zu betreiben, die ihre eigene Bildproduktion reflexiv thematisiert
The Effect of road traffic noise on housing prices in Calgary 1978 to 1982
Creators: name: Love, Brian C., 1958-
Publisher: name: University of Calgary
Year: 1984
Subjects: subject: HD 1387 L68 1986
subject: Real property - Valuation - Alberta - Calgary
subject: Traffic noise - Alberta - Calgary
subject: Noise pollution - Costs

description: Bibliography: p. 77-81.
Bursts of polarised single photons from atom-cavity sources
Creators: name: Ernst, Jan Ole
name: Alvarez, Juan-Rafael
name: Barrett, Thomas D.
name: Kuhn, Axel
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Photonic qubits play an instrumental role in the development of advanced quantum technologies, including quantum networking, boson sampling and measurement based quantum computing. A promising framework for the deterministic production of indistinguishable single photons is an atomic emitter coupled to a single mode of a high finesse optical cavity. Polarisation control is an important cornerstone, particularly when the polarisation defines the state of a quantum bit. Here, we propose a scheme for producing bursts of polarised single photons by coupling a generalised atomic emitter to an optical cavity, exploiting a particular choice of quantisation axis. In connection with two re-preparation methods, simulations predict 10-photon bursts coincidence count rates on the order of 1 kHz with single 87Rb atoms trapped in a state of the art optical cavity. This paves the way for novel n-photon experiments with atom-cavity sources.
Badziahin-Pollington-Velani's theorem and Schmidt's game
Creators: name: An, Jinpeng
Publisher: name: arXiv
Year: 2012
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics

description: We prove that for any $s,t\ge0$ with $s+t=1$ and any $θ\in\mathbb{R}$ with $\inf_{q\in\mathbb{N}}q^{\frac{1}{s}}\|qθ\|>0$, the set of $y\in\mathbb{R}$ for which $(θ,y)$ is $(s,t)$-badly approximable is 1/2-winning for Schmidt's game. As a consequence, we remove a technical assumption in a recent theorem of Badziahin-Pollington-Velani on simultaneous Diophantine approximation.
description: 12 pages
Multireference protonation energetics of a dimeric model of nitrogenase iron-sulfur clusters
Creators: name: Zhai, Huanchen
name: Lee, Seunghoon
name: Cui, Zhi-Hao
name: Cao, Lili
name: Ryde, Ulf
name: Chan, Garnet Kin-Lic
Publisher: name: arXiv
Year: 2023
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Characterizing the electronic structure of the iron--sulfur clusters in nitrogenase is necessary to understand their role in the nitrogen fixation process. One challenging task is to determine the protonation state of the intermediates in the nitrogen fixing cycle. Here, we use a dimeric iron--sulfur model to study relative energies of protonation at C, S or Fe. Using a composite method based on coupled cluster and density matrix renormalization group energetics, we converge the relative energies of four protonated configurations with respect to basis set and correlation level. We find that accurate relative energies require large basis sets, as well as a proper treatment of multireference and relativistic effects. We have also tested ten density functional approximations for these systems. Most of them give large errors in the relative energies. The best performing functional in this system is B3LYP, which gives mean absolute and maximum errors of only 10 and 13 kJ/mol with respect to our correlated wavefunction estimates, respectively. Our work provides benchmark results for the calibration of new approximate electronic structure methods and density functionals for these problems.
description: 13 pages, 8 figures
Open Science Is Impossible Without Software
Creators: name: Chue Hong, Neil
Publisher: name: Zenodo
Year: 2016
Subjects: Open science
Research software
Software sustainability
Open source

description: In a 2014 survey of UK research-intensive universities, 92% of

researchers said they used research software and 68% said their

research would be impossible without software. Yet the sharing and

sustainability of research software is often forgotten in the debate

about Open Science, Open Access and Open Data, despite the visibility

of the open source software movement. One of the largest challenges is

overcoming the barriers to sharing software: something which requires

the involvement of research communities, and a change to the cultural

norms.

Talk given at the Netherlands 2016 EU Presidency Open Science Conference, Amsterdam.
description: {"references": ["Hettrick et al. UK Research Software Survey 2014, doi: 10.5281/zenodo.14809", "Begley, Ellis. Raise Standards for Preclinical Cancer Research, Nature, 483, 2012, doi: 10.1038/483531a", "Ioannidis et al. Repeatability of published microarray gene expression analyses, Nature Genetics, 41, 2010, doi: 10.1038/ng.295", "Collberg, Proebsting, Warren, University of Arizona TR 14-04, 2015, http://reproducibility.cs.arizona.edu/v2/RepeatabilityTR.pdf", "Llorente et al. Ancient Ethiopian genome reveals extensive Eurasian admixture throughout the African continent, Science, 350, 6262 doi: 10.1126/science.aad2879", "Monroe. When Data Is Not Enough, Communications of the ACM, 58, 12, 2015, doi: 10.1145/2833138", "Goldacre. The BMJ should require all papers to share their analytic code. http://www.bmj.com/content/351/bmj.h4596/rr-55", "Of more than academic interest, The Economist, March 2016. Available from: http://www.economist.com/news/science-and-technology/21695377-professors-unprofessional-programs-have-created-new-profession-more", "Stodden, Presentation at AMP 2011. Available from: http://www.stodden.net/AMP2011/", "Piwowar, Day, Fridsma. Sharing Detailed Research Data Is Associated with Increased Citation Rate, PLoS ONE, 2007, doi: 10.1371/journal.pone.0000308", "Vanderwalle. Code Sharing Is Associated with Research Impact in Image Processing, Computing in Science and Engineering, 14, 4, 2012, doi: 10.1109/MCSE.2012.63", "Bilge. The Origin & Spread of HIV-1 Subtype B in the Americas, 2012, Available from: http://www.phylo.org/pdf_docs/Bilge_Poster.pdf"]}
A Lithogeochemical study of the Akie BA-PB-ZN mineral district, northeastern British Columbia
Creators: name: Lowey, Jennifer Fortune
Publisher: name: University of Calgary
Year: 1984
Subjects: subject: QE 515 L68 1986
subject: Geochemistry - British Columbia - Akie River District
subject: Isotope geology - British Columbia - Akie River District
subject: Sediments (Geology)

description: Bibliography: p. 149-159.
Deposition of general ellipsoidal particles
Creators: name: Baram, Reza M.
name: Lind, Pedro G.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We present a systematic overview of granular deposits composed of ellipsoidal particles with different particle shapes and size polydispersities. We study the density and anisotropy of such deposits as functions of size polydispersity and two shape parameters that fully describe the shape of a general ellipsoid. Our results show that, while shape influences significantly the macroscopic properties of the deposits, polydispersity plays apparently a secondary role. The density attains a maximum for a particular family of non-symmetrical ellipsoids, larger than the density observed for prolate or oblate ellipsoids. As for anisotropy measures, the contact forces show are increasingly preferred along the vertical direction as the shape of the particles deviates for a sphere. The deposits are constructed by means of an efficient molecular dynamics method, where the contact forces are efficiently and accurately computed. The main results are discussed in the light of applications for porous media models and sedimentation processes.
description: 7 pages, 8 figures
The Stratigraphy and sedimentology of siliciclastic rocks, west-central Yukon, and their tectonic implications
Creators: name: Lowey, G. W. (Grant William)
Publisher: name: University of Calgary
Year: 1984
Subjects: subject: QE 691 L68 1985
subject: Geology, Stratigraphic - Tertiary
subject: Geology - Yukon Territory
subject: Rocks, Sedimentary
subject: Geology, Stratigraphic - Mesozoic
subject: Rock, Siliceous

description: Bibliography: p. 311-329.
description: Siliciclastic strata between Carmacks and Dawson in west-central Yukon were previously interpreted as Eocene or younger in age and fluvial/continental in origin. Detailed stratigraphic and sedimentologic investigations in the Indian River and Sixtyrnile River areas indicate that some of the strata are much older and were deposited in a paralic environment. The Indian River Formation (new) is at least 500 m thick and consists of interbedded sandstone, shale, conglomerate dinoflagellates and minor indicate coal. that the Spores, formation pollen and is Middle Albian in age and was deposited in a hitherto unrecognized marginal marine basin by a southward prograding fan-delta complex. The Sixtyrnile Formation (new) is approximately 200 m thick and consists of interbedded conglomerate, sandstone, shale and minor limestone and tuff, and intercalated basalt flows. the close association of Palynomorphs, fossil leaves and volcanic rocks indicate the formation is Late Cretaceous-Paleocene in age, possibly Maastrichtian, and is assigned to the lower part of the Carmacks Group. The formation was deposited in a restricted, nonmarine basin by a northward flowing braided-meandering river system and a southward prograding alluvial fan complex. Previous paleogeographic reconstructions indicate that Whitehorse Trough, a Late Triassic to Middle Jurassic backarc or forearc basin {Lewes River and Laberge groups, basalt flows, carbonate reefs and flysch), evolved into a series of restricted, nonmarine basins by Late Jurassic to Early Cretaceous time {Tantalus Formation, alluvial plain). This study proposes that the Trough evolved from a Late Triassic to Middle Jurassic backarc or forearc basin into a successor basin by Late Jurassic to Early Cretaceous time {Tantalus and Indian River formations), which subsequently evolved into a series of restricted, nonmarine basins by Late Cretaceous to Paleogene time {Sixtymile Formation and unnamed strata). Late Mesozoic-Paleogene siliciclastic strata in west-central Yukon reflect the collision, suturing and emplacement of allochthonous with autochthonous terranes and are interpreted as part of the "successor basin" molasse facies of the Canadian Cordillera.
Plasma diagnostics of an EIT wave observed by Hinode/EIS and SDO/AIA
Creators: name: Veronig, A. M.
name: Gomory, P.
name: Kienreich, I. W.
name: Muhr, N.
name: Vrsnak, B.
name: Temmer, M.
name: Warren, H. P.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present plasma diagnostics of an EIT wave observed with high cadence in Hinode/EIS sit-and-stare spectroscopy and SDO/AIA imagery obtained during the HOP-180 observing campaign on 2011 February 16. At the propagating EIT wave front, we observe downward plasma flows in the EIS Fe XII, Fe XIII, and Fe XVI spectral lines (log T ~ 6.1-6.4) with line-of-sight (LOS) velocities up to 20 km/s. These red-shifts are followed by blue-shifts with upward velocities up to -5 km/s indicating relaxation of the plasma behind the wave front. During the wave evolution, the downward velocity pulse steepens from a few km/s up to 20 km/s and subsequently decays, correlated with the relative changes of the line intensities. The expected increase of the plasma densities at the EIT wave front estimated from the observed intensity increase lies within the noise level of our density diagnostics from EIS XIII 202/203 AA line ratios. No significant LOS plasma motions are observed in the He II line, suggesting that the wave pulse was not strong enough to perturb the underlying chromosphere. This is consistent with the finding that no Halpha Moreton wave was associated with the event. The EIT wave propagating along the EIS slit reveals a strong deceleration of a ~ -540 m/s2 and a start velocity of v0 ~ 590 km/s. These findings are consistent with the passage of a coronal fast-mode MHD wave, pushing the plasma downward and compressing it at the coronal base.
description: Accepted for ApJ Letters
title: Μέθοδοι σχεδιασμού συγκολλήσεων λιμενικών γερανών εμπορευματοκιβωτίων έναντι φορτίων κοπώσεως
titleType: AlternativeTitle
title: Welds design methods for container port cranes against fatigue loads
Creators: name: Papadopoulos, Ioannis Alkinoos
Publisher: name: National Technological University of Athens
Year: 2025
Subjects: Μεταλλικές κατασκευές
Λιμενικοί γερανοί
Συγκολλήσεις
Κόπωση
Steel structures
Port cranes
Welds
Fatigue

description: Εθνικό Μετσόβιο Πολυτεχνείο--Μεταπτυχιακή Εργασία. Διεπιστημονικό-Διατμηματικό Πρόγραμμα Μεταπτυχιακών Σπουδών (Δ.Π.Μ.Σ.) “Δομοστατικός Σχεδιασμός και Ανάλυση των Κατασκευών”
Non-perturbative gauge/gravity correspondence in N=2 theories
Creators: name: Billó, M.
name: Frau, M.
name: Fucito, F.
name: Giacone, L.
name: Lerda, A.
name: Morales, J. F.
name: Pacifici, D. Ricci
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We derive the exact supergravity profile for the twisted scalar field emitted by a system of fractional D3 branes at a Z2 orbifold singularity supporting N=2 quiver gauge theories with unitary groups and bifundamental matter. At the perturbative level this twisted field is "dual" to the gauge coupling but it is corrected non-perturbatively by an infinite tower of fractional D-instantons. The explicit microscopic description allows to derive the gravity profile from disk amplitudes computing the emission rate of the twisted scalar field in terms of chiral correlators in the dual gauge theory. We compute these quantum correlators using multi-instanton localization techniques and/or Seiberg-Witten analysis. Finally, we discuss a non-perturbative relation between the twisted scalar and the effective coupling of the gauge theory for some simple choices of the brane set ups.
description: 42 pages. 3 figures, PDFLaTeX
Transparent boundary conditions based on the Pole Condition for time-dependent, two-dimensional problems
Creators: name: Ruprecht, Daniel
name: Schädle, Achim
name: Schmidt, Frank
Publisher: name: arXiv
Year: 2012
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: The pole condition approach for deriving transparent boundary conditions is extended to the time-dependent, two-dimensional case. Non-physical modes of the solution are identified by the position of poles of the solution's spatial Laplace transform in the complex plane. By requiring the Laplace transform to be analytic on some problem dependent complex half-plane, these modes can be suppressed. The resulting algorithm computes a finite number of coefficients of a series expansion of the Laplace transform, thereby providing an approximation to the exact boundary condition. The resulting error decays super-algebraically with the number of coefficients, so relatively few additional degrees of freedom are sufficient to reduce the error to the level of the discretization error in the interior of the computational domain. The approach shows good results for the Schrödinger and the drift-diffusion equation but, in contrast to the one-dimensional case, exhibits instabilities for the wave and Klein-Gordon equation. Numerical examples are shown that demonstrate the good performance in the former and the instabilities in the latter case.
Formation and evolution of a multi-threaded prominence
Creators: name: Luna, M.
name: Karpen, J. T.
name: DeVore, C. R.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We investigate the process of formation and subsequent evolution of prominence plasma in a filament channel and its overlying arcade. We construct a three-dimensional time-dependent model of an intermediate quiescent prominence. We combine the magnetic field structure with one-dimensional independent simulations of many flux tubes, of a three-dimensional sheared double arcade, in which the thermal nonequilibrium process governs the plasma evolution. We have found that the condensations in the corona can be divided into two populations: threads and blobs. Threads are massive condensations that linger in the field line dips. Blobs are ubiquitous small condensations that are produced throughout the filament and overlying arcade magnetic structure, and rapidly fall to the chromosphere. The threads are the principal contributors to the total mass. The total prominence mass is in agreement with observations, assuming a reasonable filling factor. The motion of the threads is basically horizontal, while blobs move in all directions along the field. The peak velocities for both populations are comparable. We have generated synthetic images of the whole structure in an H$α$ proxy and in two EUV channels of the AIA instrument aboard SDO, thus showing the plasma at cool, warm, and hot temperatures. The predicted differential emission measure of our system agrees very well with observations. We conclude that the sheared-arcade magnetic structure and plasma behavior driven by thermal nonequilibrium fit well the abundant observational evidence for typical intermediate prominences.
description: ApJ in press
Особенности Правового Обеспечения Страхования Рисков Нанотехнологий
Creators: name: Zulfugarzade, Teymur
Publisher: name: Zenodo
Year: 2016
Subjects: law

description: The paper deals with the basics of legal maintenance of insurance risks in the field of nanotechnology; makes proposals to improve the legislation of the Russian Federation on Insurance, as applied to the field of nanotechnology.
description: В работе рассматриваются основы правового обеспечения страхования рисков в сфере нанотехнологий; вносятся предложения по совершенствованию законодательства Российской Федерации о страховании, применительно к нанотехнологической сфере.
On a family of (1+1)-dimensional scalar field theory models: kinks, stability, one-loop mass shifts
Creators: name: Alonso-Izquierdo, Alberto
name: Mateos-Guilarte, Juan
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: In this paper we construct a one-parametric family of (1+1)-dimensional one-component scalar field theory models supporting kinks. Inspired by the sine-Gordon and $ϕ^4$ models, we look at all possible extensions such that the kink second-order fluctuation operators are Schrödinger differential operators with Pöschl-Teller potential wells. In this situation, the associated spectral problem is solvable and therefore we shall succeed in analyzing the kink stability completely and in computing the one-loop quantum correction to the kink mass exactly. When the parameter is a natural number, the family becomes the hierarchy for which the potential wells are reflectionless, the two first levels of the hierarchy being the sine-Gordon and $ϕ^4$ models.
description: 23 pages, 4 figures, to be published in Annals of Physics
title: Το πρόβλημα παραλαβής και παράδοσης με κέντρο διαμετακόμισης για ηλεκτρικά οχήματα.
titleType: AlternativeTitle
title: The pickup and delivery problem with crossdocking for electric vehicles.
Creators: name: Dimopoulos, Athanasios
Publisher: name: National Technological University of Athens
Year: 2025
Subjects: Πρόβλημα παραλαβής και παράδοσης
Ηλεκτρικά οχήματα
Κέντρο διαμετακόμισης
Βιώσιμες μεταφορές
Πρόβλημα δρομολόγησης οχημάτων
Pickup and delivery problem
Electric vehicles
Crossdocking
Vehicle routing problem
Sustainable logistics

description: Εθνικό Μετσόβιο Πολυτεχνείο--Μεταπτυχιακή Εργασία. Διεπιστημονικό-Διατμηματικό Πρόγραμμα Μεταπτυχιακών Σπουδών (Δ.Π.Μ.Σ.) “Παραγωγή και Διαχείριση Ενέργειας”
Hadronic top-quark pair production in association with two jets at Next-to-Leading Order QCD
Creators: name: Bevilacqua, G.
name: Czakon, M.
name: Papadopoulos, C. G.
name: Worek, M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We report on the calculation of the next-to-leading order QCD corrections to the production of ttbar pairs in association with two hard jets at the Fermilab TeVatron and CERN Large Hadron Collider. Results for the integrated and differential cross sections are given. The corrections with respect to leading order are negative and moderate. A study of the scale dependence of our NLO predictions indicates that the residual theoretical uncertainty, due to higher order corrections, is 21% for the TeVatron and 15% for the LHC. In case of the TeVatron, the forward-backward asymmetry of the top quark is calculated for the first time at next-to-leading order. With the inclusive selection of cuts, this asymmetry amounts to A_FB = -10.3% at leading order and A_FB = -4.6% at next-to-leading order. All results presented in this paper have been obtained with the help of the HELAC-NLO package.
description: 18 pages, 18 figures and 13 tables
How to Prompt LLMs for Text-to-SQL: A Study in Zero-shot, Single-domain, and Cross-domain Settings
Creators: name: Chang, Shuaichen
name: Fosler-Lussier, Eric
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: Large language models (LLMs) with in-context learning have demonstrated remarkable capability in the text-to-SQL task. Previous research has prompted LLMs with various demonstration-retrieval strategies and intermediate reasoning steps to enhance the performance of LLMs. However, those works often employ varied strategies when constructing the prompt text for text-to-SQL inputs, such as databases and demonstration examples. This leads to a lack of comparability in both the prompt constructions and their primary contributions. Furthermore, selecting an effective prompt construction has emerged as a persistent problem for future research. To address this limitation, we comprehensively investigate the impact of prompt constructions across various settings and provide insights into prompt constructions for future text-to-SQL studies.
Optical and Dynamical Characterization of Comet-Like Main-Belt Asteroid (596) Scheila
Creators: name: Hsieh, Henry H.
name: Yang, Bin
name: Haghighipour, Nader
Publisher: name: arXiv
Year: 2011
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We present observations and a dynamical analysis of the comet-like main-belt object, (596) Scheila. V-band photometry obtained on UT 2010 December 12 indicates that Scheila's dust cloud has a scattering cross-section ~1.4 times larger than that of the nucleus, corresponding to a dust mass of M_d~3x10^7 kg. V-R color measurements indicate that both the nucleus and dust are redder than the Sun, with no significant color differences between the dust cloud's northern and southern plumes. We also undertake an ultimately unsuccessful search for CN emission, where we find CN and H2O production rates of Q(CN) < 9x10^23 s^-1 and Q(H2O) < 10^27 s^{-1}. Numerical simulations indicate that Scheila is dynamically stable for >100 Myr, suggesting that it is likely native to its current location. We also find that it does not belong to a dynamical asteroid family of any significance. We consider sublimation-driven scenarios that could produce the appearance of multiple plumes of dust emission, but reject them as being physically implausible. Instead, we concur with previous studies that the unusual morphology of Scheila's dust cloud is most simply explained by a single oblique impact, meaning this object is likely not a main-belt comet, but is instead the second disrupted asteroid after P/2010 A2 (LINEAR) to be discovered.
description: 13 pages, 4 figures, accepted for publication in ApJ
Families of superhard crystalline carbon allotropes induced via cold-compressed graphite and nanotubes
Creators: name: Niu, Haiyang
name: Chen, Xing-Qiu
name: Wang, Shibing
name: Li, Dianzhong
name: Mao, Wendy L.
name: Li, Yiyi
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report a general scheme to systematically construct two classes of structural families of superhard sp3 carbon allotropes of cold compressed graphite through the topological analysis of odd 5+7 or even 4+8 membered carbon rings stemmed from the stacking of zigzag and armchair chains. Our results show that the previously proposed M, bct-C4, W and Z allotropes belong to our currently proposed families and that depending on the topological arrangement of the native carbon rings numerous other members are found that can help us understand the structural phase transformation of cold-compressed graphite and carbon nanotubes (CNTs). In particular, we predict the existence of two simple allotropes, R- and P-carbon, which match well the experimental X-ray diffraction patterns of cold-compressed graphite and CNTs, respectively, display a transparent wide-gap insulator ground state and possess a large Vickers hardness comparable to diamond.
description: 5 pages, 4 figures, accepted by Phys. Rev. Lett
Lithofacies and diagenesis of the Cardium Formation, northeast Pembina area, Alberta
Creators: name: Machemer, S. D. (Steven Dean), 1957-
Publisher: name: University of Calgary
Year: 1984
Subjects: subject: QE 471 M32 1986
subject: Lithofacies - Alberta - Cardium Formation
subject: Diagenesis - Alberta - Cardium Formation

description: Bibliography: p. 154-162
Lorentz Group and Oriented MICZ-Kepler Orbits
Creators: name: Meng, Guowu
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mathematical Physics (math-ph)
subject: Differential Geometry (math.DG)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: The MICZ-Kepler orbits are the non-colliding orbits of the MICZ Kepler problems (the magnetized versions of the Kepler problem). The oriented MICZ-Kepler orbits can be parametrized by the canonical angular momentum $\mathbf L$ and the Lenz vector $\mathbf A$, with the parameter space consisting of the pairs of 3D vectors $(\mathbf A, \mathbf L)$ with ${\mathbf L}\cdot {\mathbf L} > (\mathbf L\cdot \mathbf A)^2$. The recent 4D perspective of the Kepler problem yields a new parametrization, with the parameter space consisting of the pairs of Minkowski vectors $(a,l)$ with $l\cdot l =-1$, $a\cdot l =0$, $a_0>0$. This new parametrization of orbits implies that the MICZ-Kepler orbits of different magnetic charges are related to each other by symmetries: \emph{${\mathrm {SO}}^+(1,3)\times {\mathbb R}_+$ acts transitively on both the set of oriented elliptic MICZ-Kepler orbits and the set of oriented parabolic MICZ-Kepler orbits}. This action extends to ${\mathrm {O}}^+(1,3)\times {\mathbb R}_+$, the \emph{structure group} for the rank-two Euclidean Jordan algebra whose underlying Lorentz space is the Minkowski space.
description: 7 pages