cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
HDDL 2.1: Towards Defining a Formalism and a Semantics for Temporal HTN Planning
Creators: name: Pellier, Damien
name: Albore, Alexandre
name: Fiorino, Humbert
name: Bailon-Ruiz, Rafael
Publisher: name: arXiv
Year: 2023
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Real world applications as in industry and robotics need modelling rich and diverse automated planning problems. Their resolution usually requires coordinated and concurrent action execution. In several cases, these problems are naturally decomposed in a hierarchical way and expressed by a Hierarchical Task Network (HTN) formalism. HDDL, a hierarchical extension of the Planning Domain Definition Language (PDDL), unlike PDDL 2.1 does not allow to represent planning problems with numerical and temporal constraints, which are essential for real world applications. We propose to fill the gap between HDDL and these operational needs and to extend HDDL by taking inspiration from PDDL 2.1 in order to express numerical and temporal expressions. This paper opens discussions on the semantics and the syntax needed for a future HDDL 2.1 extension.
description: 5 pages, International Workshop of Hierarchical Planning (ICAPS), 2023
Rossby Wave Instability in Accretion Discs with Large-Scale Poloidal Magnetic Fields
Creators: name: Yu, Cong
name: Lai, Dong
Publisher: name: arXiv
Year: 2012
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We study the effect of large-scale magnetic fields on the non-axisymmetric Rossby wave instability (RWI) in accretion discs. The instability develops around a density bump, which is likely present in the transition region between the active zone and dead zone of protoplanetary discs. Previous works suggest that the vortices resulting from the RWI may facilitate planetesimal formation and angular momentum transport. We consider discs threaded by a large-scale poloidal magnetic field, with a radial field component at the disc surface. Such field configurations may lead to the production of magnetic winds or jets. In general, the magnetic field can affect the RWI even when it is sub-thermal (plasma $β\sim 10$). For infinitely thin discs, the instability can be enhanced by about 10 percent. For discs with finite thickness, with a radial gradient of the magnetic field strength, the RWI growth rate can increase significantly (by a factor of $\sim 2$) as the field approaches equipartition ($β\sim 1$). Our result suggests that the RWI can continue to operate in discs that produce magnetic winds.
description: Accepted for publication in MNRAS, 7 pages, 8 figures
Adaptation of the Kaufman Assessment Battery for Children—2nd edition (KABC-II) to assess school-age neurodevelopment in rural Zimbabwe
Creators: name: Piper, Joe
name: Ntozini, Robert
name: Prendergast, Andrew
name: Mazhanga, Clever
name: Mapurisa, Idah
name: Mashedze, Tsitsi
name: Mapako, Gloria
name: Munyama, Eunice
name: Mwapaura, Marian
name: Chidhanguro, Dzivaidzo
name: Tavengwa, Naume
name: Langhaug, Lisa
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Education
subject: Pediatrics
subject: Life Sciences
subject: Neuroscience and Neurobiology
subject: Developmental Neuroscience
subject: Medicine and Health Sciences
subject: Medical Specialties
subject: KABC-II
subject: neurodevelopment
subject: SHINE Follow-up
subject: Zimbabwe

description: There remains an urgent need for neurodevelopment assessment tools that can be applied in low-resource settings, where over 250 million children remain at risk of poor cognitive development. This project describes the adaptation of two subtests (pattern reasoning and story completion) within the Kaufman Assessment Battery for Children--2nd edition (KABC-II) for use in rural Zimbabwean children aged 7 years, both within the planning domain.
Are Software Updates Useless Against Advanced Persistent Threats?
Creators: name: Massacci, Fabio
name: Di Tizio, Giorgio
Publisher: name: arXiv
Year: 2023
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: A dilemma worth Shakespeare's Hamlet is increasingly haunting companies and security researchers: ``to update or not to update, this is the question``. From the perspective of recommended common practices by software vendors the answer is unambiguous: you should keep your software up-to-date. But is common sense always good sense? We argue it is not.
Venus' Atmospheric Chemistry and Cloud Characteristics Are Compatible with Venusian Life
Creators: name: Bains, William
name: Petkowski, Janusz J.
name: Seager, Sara
Publisher: name: arXiv
Year: 2023
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Venus is Earth's sister planet, with similar mass and density but an uninhabitably hot surface, an atmosphere with a water activity 50-100 times lower than anywhere on Earths' surface, and clouds believed to be made of concentrated sulfuric acid. These features have been taken to imply that the chances of finding life on Venus are vanishingly small, with several authors describing Venus' clouds as "uninhabitable", and that apparent signs of life there must therefore be abiotic, or artefactual. In this article, we argue that although many features of Venus can rule out the possibility that Earth life could live there, none rule out the possibility of all life based on what we know of the physical principle of life on Earth. Specifically, there is abundant energy, the energy requirements for retaining water and capturing hydrogen atoms to build biomass are not excessive, defenses against sulfuric acid are conceivable and have terrestrial precedent, and the speculative possibility that life uses concentrated sulfuric acid as a solvent instead of water remains. Metals are likely to be available in limited supply, and the radiation environment is benign. The clouds can support a biomass that could readily be detectable by future astrobiology-focused space missions from its impact on the atmosphere. Although we consider the prospects for finding life on Venus to be speculative, they are not absent. The scientific reward from finding life in such an un-Earthlike environment justifies considering how observations and missions should be designed to be capable of detecting life if it is there.
description: Published in Astrobiology, June 12, 2023: https://www.liebertpub.com/doi/full/10.1089/ast.2022.0113
Dual-Mode Teaching in the Language Classroom: Reconciling the Pandemic, Equity, and the Future of Quality Language Teaching Pedagogy
Creators: name: Olsen-Reeder, Vincent
Publisher: name: Open Access Te Herenga Waka-Victoria University of Wellington
Year: 2022
Subjects: Education

description: The COVID-19 pandemic sent New Zealand universities into crisis, and as a key crisis response measure, classes were mostly moved online. While navigating national public health settings, educators simultaneously had to innovate quickly: to keep our courses in operation, students learning, and quality pedagogy present. The author has been navigating a faculty-wide ‘dual-mode’ teaching policy at their home institution, to teach the Māori language. Dual-mode refers to teaching both in-person and online. Although dual-mode teaching has brought a significant amount of learning flexibility and innovation to the classroom, it also has disadvantages. This article attempts to document some of the positive and negative characteristics noted over two years of dual-mode teaching, from the position of intermediate Māori language classes. It concludes that although this kind of teaching is flexible and equitable, it is not of high quality, and contributes to poor proficiency outcomes for students. Teaching in this way could, however, be of a much higher quality, with support, resourcing and time. As we look to keep these more accessible teaching methods in the future, those additional aspects will be critical in designing classes that are not only equitable, dynamic, and in line with contemporary technological learning styles, but also of a standard that maintains quality language proficiency-building within our learners.
Towards single-cycle squeezing in chirped quasi-phase-matched optical parametric down-conversion
Creators: name: Horoshko, D. B.
name: Kolobov, M. I.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose a method for generation of a single-cycle squeezed light by parametric down-conversion in a chirped quasi-phase-matched nonlinear crystal. We find an exact quantum solution for this process valid for an arbitrary parametric gain, and discover an ultrabroadband squeezing in the down-converted light with flat squeezing spectrum comprising the full optical octave. We describe a scheme for observation of this kind of squeezing using second-harmonic generation as an ultrafast correlator.
description: 5 pages, 4 figures
Tapu and noa as negotiators of mĀori gender roles in precolonial aotearoa and today
Creators: name: Mitchell, K
name: Olsen-Reeder, Vincent
Publisher: name: Open Access Te Herenga Waka-Victoria University of Wellington
Year: 2022
Subjects: subject: 169999 Studies in Human Society not elsewhere classified
subject: FOS: Sociology
subject: Sociology

description: Tapu and noa are often cited as fundamentals by which we enact tikanga, promote well-being and divide labour. However, exactly how tapu informed precolonial gender divisions of labour is difficult to examine, mostly because of the pervasive influence Christianity has had on cosmological narratives, from which tapu derives (Mikaere, 2017; Rewi, 2010; Te Awekotuku, 1994). This article outlines some commentary on the relationship between tapu, gender roles and colonisation, and tries to extend that scholarship. We posit that the tikanga around tapu and noa in contemporary times may be more rigid than it was before, potentially a negative effect of cosmological colonisation. Furthermore, we suggest that precolonial labour may have been divided by the fundamentals of tapu, whereas in contemporary times it seems gender is the primary consideration. The centring (or recentring) of tapu in such conversations may be a worthy decolonisation avenue as we seek to empower Māori of all genders.
On the Radii of Brown Dwarfs Measured with AKARI Near-Infrared Spectroscopy
Creators: name: Sorahana, Satoko
name: Yamamura, Issei
name: Murakami, Hiroshi
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We derive the radii of 16 brown dwarfs observed by AKARI using their parallaxes and the ratios of observed to model fluxes. We find that the brown dwarf radius ranges between 0.64-1.13 RJ with an average radius of 0.83 RJ. We find a trend in the relation between radii and Teff; the radius is at a minimum at Teff~1600 K, which corresponds to the spectral types of mid-to late-L. The result is interpreted by a combination of radius-mass and radius-age relations that are theoretically expected for brown dwarfs older than 10^8 yr.
description: 22 pages, 3 figures; submitted 2012 October 14 and accepted 2013 February 12 for publication to The Astrophysical Journal
Production of charged $ρ$ meson in bottom hadron charmed decays and the effect of the finite width correction of the $ρ$ meson
Creators: name: Zhang, Zhen-Hua
name: Yang, Ya-Dong
name: Guo, Xin-Heng
name: Lü, Gang
name: Wiranata, Anton
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We calculate the branching ratio of a bottom hadron decaying into a charmed hadron and a charged $ρ$ meson within the QCD factorization approach. We consider the effect of the finite width correction of the $ρ$ meson. Our numerical calculation shows an obvious correction because of this effect. We find that the finite width effect of the $ρ$ meson reduces the branching ratios by about 9% to 11% for bottom meson decay channels: $B^+\to\bar{D^0}ρ^+$, $B^0\to D^-ρ^+$, and $B^0_s\to D^-_sρ^+$, and increases the branching ratio by about 10% for $Λ_b^0\toΛ_c^+ρ^-$.
description: 12 pages
Surface plasmons mediated energy transfer from a semiconductor quantum well to an organic overlayer
Creators: name: Kawka, Sebastien
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Other Condensed Matter (cond-mat.other)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We consider the resonant energy transfer from a two-dimensional Wannier exciton (donor) to a Frenkel exciton of a molecular crystal overlayer (acceptor) when the active medias are separated by a metallic layer, possibly an electrode. We characterize the effect of the surface plasmon on this process. Using realistic values of material parameters, we show that it is possible to change the transfer rate within typically a factor of 5 (up to 44 according to geometrical configuration). We then take into account the quenching of the organic luminescence due to the proximity with the metal. This latter is significant and affect negatively the total internal efficiency that we discuss for different geometries.
description: 8 pages, 9 figures. arXiv admin note: text overlap with arXiv:1111.5154
Nonsingular solutions to the Einstein equations on piecewise-Lorentzian manifolds
Creators: name: Holdom, Bob
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We consider 4-dimensional spacetime manifolds that are piecewise Lorentzian, where the Lorentzian components of the manifold are separated by codimension-one planes (spacelike or timelike) on which the metric is degenerate. Such manifolds are of interest because they enlarge the smooth and nonsingular solution space of the Einstein equations. Planes of degeneracy that are perpendicular to each other can exist simultaneously. We describe various solutions of this type to the vacuum equations $G_{μν}=0$ and $G_{μν}+Λg_{μν}=0$, and to $G_{μν}= 8πG T_{μν}$ for a perfect fluid. Novel examples include static gravitational lumps of finite curvature and a spacetime that responds to a cosmological constant via oscillations in time and/or space. A spacelike degeneracy plane can be used to avoid the big bang singularity, as we have further described elsewhere.
description: 16 pages, no figures
Molecular and atomic gas in the young TeV γ-ray SNRs RX J1713.7-3946 and RX J0852.0-4622; evidence for the hadronic production of γ-rays
Creators: name: Fukui, Yasuo
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The interstellar molecular clouds are the site of star formation and also the target for the cosmic ray protons to produce γ-rays via the hadronic process. The interstellar atomic gas is enveloping the molecular clouds and may also be dense enough to affect the γ-ray production. In this Chapter, some of the basic properties of the interstellar gas both in molecular and atomic forms will be reviewed. Then, it is presented that two young TeV γ-ray SNRs, RX J1713.7-3946 and RX J0852.0-4622, show good spatial correspondence between the γ-rays and the interstellar protons. The good spatial correspondence provides a support for the hadronic origin of the γ-rays in these SNRs. It is emphasized that both molecular and atomic hydrogen plays a role as targets for cosmic ray (CR) protons. The clumpy distribution of the target interstellar medium (ISM) protons is crucial in the interaction of the supernova shocks with the ISM, whereas models with uniform ISM distribution are not viable. Finally, it is suggested that the dense atomic gas without molecules may occupy the dominant part of the dark gas in the local ISM.
description: 23 pages, 15 figures, To appear in "Cosmic Rays in Star-Forming Environments: Proceedings of the Second Session of the Sant Cugat Forum on Astrophysics" (April 16-19, 2012), Torres, Diego F. and Reimer, Olaf (Eds.)
Range Limited Coverage Control using Air-Ground Multi-Robot Teams
Creators: name: Rudolph, Max
name: Wilson, Sean
name: Egerstedt, Magnus
Publisher: name: arXiv
Year: 2023
Subjects: subject: Robotics (cs.RO)
subject: Multiagent Systems (cs.MA)
subject: FOS: Computer and information sciences

description: In this paper, we investigate how heterogeneous multi-robot systems with different sensing capabilities can observe a domain with an apriori unknown density function. Common coverage control techniques are targeted towards homogeneous teams of robots and do not consider what happens when the sensing capabilities of the robots are vastly different. This work proposes an extension to Lloyd's algorithm that fuses coverage information from heterogeneous robots with differing sensing capabilities to effectively observe a domain. Namely, we study a bimodal team of robots consisting of aerial and ground agents. In our problem formulation we use aerial robots with coarse domain sensors to approximate the number of ground robots needed within their sensing region to effectively cover it. This information is relayed to ground robots, who perform an extension to the Lloyd's algorithm that balances a locally focused coverage controller with a globally focused distribution controller. The stability of the Lloyd's algorithm extension is proven and its performance is evaluated through simulation and experiments using the Robotarium, a remotely-accessible, multi-robot testbed.
description: Published at 2021 IEEE International Conference on Robotics and Automation (ICRA)
Transverse momentum-weighted Sivers asymmetry in semi-inclusive deep inelastic scattering at next-to-leading order
Creators: name: Kang, Zhong-Bo
name: Vitev, Ivan
name: Xing, Hongxi
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We study the next-to-leading order perturbative QCD corrections to the transverse momentum-weighted Sivers asymmetry in semi-inclusive hadron production in lepton-proton deep inelastic scattering. The corresponding differential cross section is evaluated as a convolution of a twist-three quark-gluon correlation function, often referred to as Qiu-Sterman function, the usual unpolarized fragmentation function, and a hard coefficient function. By studying the collinear divergence structure, we identify the evolution kernel for the Qiu-Sterman function. The hard coefficient function, which is finite and free of any divergence, is evaluated at one-loop order.
description: 11 pages, 6 figures
The 4 K outer cryostat for the CUORE experiment: construction and quality control
Creators: name: Alessandria, F.
name: Biassoni, M.
name: Ceruti, G.
name: Chiarini, A.
name: Clemenza, M.
name: Cremonesi, O.
name: Datskov, V.
name: Dossena, S.
name: Faverzani, M.
name: Ferri, E.
name: Nucciotti, A.
name: Perego, M.
name: Previtali, E.
name: Sisti, M.
name: Taffarello, L.
name: Terranova, F.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The external shell of the CUORE cryostat is a large cryogen-free system designed to host the dilution refrigerator and the bolometers of the CUORE experiment in a low radioactivity environment. The three vessels that form the outer shell were produced and delivered to the Gran Sasso underground Laboratories in July 2012. In this paper, we describe the production techniques and the validation tests done at the production site in 2012.
description: 11 pages, 13 figures; to appear in NIMA
title: Earthquake Retrofit for Older Masonry Buildings
Creators: name: M., Wehner
name: M., Edwards
name: J., Vaculik
name: M., Wehner
Publisher: name: Commonwealth of Australia (Geoscience Australia)
Year: 2022
Subjects: subject: EARTH SCIENCES
subject: Earthquake
subject: Retrofit
subject: Unreinforced masonry
subject: Published_External

description: Damaging earthquakes are less frequent in Australia when compared to weather related events, but when they occur close to communities they can cause significant damage and injury. This community risk to life, property, social fabric, valued community heritage and the local economy is significant and is gaining recognition. Some state and local governments are seeking to raise awareness of earthquake risk with property owners and are targeting grants schemes to promote cost shared investment in retrofit activity. Where property owners do take the initiative to address structural deficiencies they need the assistance of design professionals and a skilled construction industry to undertake retrofit with due address of heritage considerations. If you work in either domain, this document will assist you. This document is aimed to be a resource for you when discussing retrofit needs and options with clients and translating their retrofit objectives to detailed design, documentation and implementation. The primary focus is the most vulnerable building construction type in Australia, older unreinforced masonry, but the principles are informative to address other high risk building types. The objective is cost-effective retrofit measures with minimised disruption to occupants that can address a significant portion of the earthquake risk to the building owner and the community more broadly. It presents information that explains the nature of earthquake hazard in Australia, the risk it presents and the vulnerability factors that contribute to it. It further describes the common failure modes that can be highlighted to clients and a range of measures that can be employed to preclude these. It also links to other resources that can be drawn upon in developing tailored design solutions that the construction industry can readily implement.
An Artificially Lattice Mismatched Graphene/Metal Interface: Graphene/Ni/Ir(111)
Creators: name: Pacilé, D.
name: Leicht, P.
name: Papagno, M.
name: Sheverdyaeva, P. M.
name: Moras, P.
name: Carbone, C.
name: Krausert, K.
name: Zielke, L.
name: Fonin, M.
name: Dedkov, Y. S.
name: Mittendorfer, F.
name: Doppler, J.
name: Garhofer, A.
name: Redinger, J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report the structural and electronic properties of an artificial graphene/Ni(111) system obtained by the intercalation of a monoatomic layer of Ni in graphene/Ir(111). Upon intercalation, Ni grows epitaxially on Ir(111), resulting in a lattice mismatched graphene/Ni system. By performing Scanning Tunneling Microscopy (STM) measurements and Density Functional Theory (DFT) calculations, we show that the intercalated Ni layer leads to a pronounced buckling of the graphene film. At the same time an enhanced interaction is measured by Angle-Resolved Photo-Emission Spectroscopy (ARPES), showing a clear transition from a nearly-undisturbed to a strongly-hybridized graphene $π$-band. A comparison of the intercalation-like graphene system with flat graphene on bulk Ni(111), and mildly corrugated graphene on Ir(111), allows to disentangle the two key properties which lead to the observed increased interaction, namely lattice matching and electronic interaction. Although the latter determines the strength of the hybridization, we find an important influence of the local carbon configuration resulting from the lattice mismatch.
description: 9 pages, 3 figures, Accepted for publication in Phys. Rev. B
title: Earthquake Resilient Communities: Lessons for Government and Emergency Management
Creators: name: M., Wehner
name: M., Edwards
name: J., Vaculik
name: M., Wehner
Publisher: name: Commonwealth of Australia (Geoscience Australia)
Year: 2022
Subjects: subject: EARTH SCIENCES
subject: Earthquake
subject: Retrofit
subject: Unreinforced masonry
subject: Published_External

description: While damaging earthquakes are less frequent in Australia when compared to other weather related events, when they do occur close to communities they can cause major damage and injury. This community risk to life, property, social fabric and the local economy is significant. The risk also presents associated challenges for government agencies with a role in emergency response, health care and community recovery both in the short and longer term. For some communities recovery to pre-event conditions may never be fully realised due to the destruction of heritage value that may be central to local business activity. Resources for building resilience to earthquakes need to be prioritised against those needed for other hazards. What are the benefits of earthquake retrofit of high risk buildings to communities and what exemplars of risk management driven from government exist? What resources exist for a business case to be articulated for limited resources and for motivating investment by property owners to reduce their individual risk? This document seeks provide useful answer these questions. It presents information that explains the nature of earthquake hazard in Australia, the risk it presents and vulnerability factors behind it. It also provides information on the effectiveness of retrofit in reducing the impact of earthquakes, emergency management logistics and recovery needs. It further provides links to resources that can be used to advance local programs for building community resilience. The primary focus is the most vulnerable building construction type, unreinforced masonry, but the principles are informative to the address of other high risk building types in communities.
Outflows of stars due to quasar feedback
Creators: name: Zubovas, Kastytis
name: Nayakshin, Sergei
name: Sazonov, Sergey
name: Sunyaev, Rashid
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Quasar feedback outflows are commonly invoked to drive gas out of galaxies in the early gas-rich epoch to terminate growth of galaxies. Here we present simulations that show that AGN feedback may drive not only gas but also stars out of their host galaxies under certain conditions. The mechanics of this process is as following: (1) AGN-driven outflows accelerate and compress gas filling the host galaxy; (2) the accelerated dense shells become gravitationally unstable and form stars on radial trajectories. For the spherically symmetric initial conditions explored here, the black hole needs to exceed the host's M_sigma mass by a factor of a few to accelerate the shells and the new stars to escape velocities. We discuss potential implications of these effects for the host galaxies: (i) radial mixing of bulge stars with the rest of the host; (ii) contribution of quasar outflows to galactic fountains as sources of high-velocity clouds; (iii) wholesale ejection of hyper velocity stars out of their hosts, giving rise to type II supernovae on galactic outskirts, and contributing to reionization and metal enrichment of the Universe; (iv) bulge erosion and even complete destruction in extreme cases resulting in overweight or bulgeless SMBHs.
description: 6 pages, 3 figures; accepted for publication in MNRAS
Classification of Human Epithelial Type 2 Cell Indirect Immunofluoresence Images via Codebook Based Descriptors
Creators: name: Wiliem, Arnold
name: Wong, Yongkang
name: Sanderson, Conrad
name: Hobson, Peter
name: Chen, Shaokang
name: Lovell, Brian C.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cell Behavior (q-bio.CB)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Quantitative Methods (q-bio.QM)
subject: FOS: Biological sciences
subject: FOS: Computer and information sciences
subject: I.2.10; I.4.6; I.4.7; I.4.10; I.5.4; G.3

description: The Anti-Nuclear Antibody (ANA) clinical pathology test is commonly used to identify the existence of various diseases. A hallmark method for identifying the presence of ANAs is the Indirect Immunofluorescence method on Human Epithelial (HEp-2) cells, due to its high sensitivity and the large range of antigens that can be detected. However, the method suffers from numerous shortcomings, such as being subjective as well as time and labour intensive. Computer Aided Diagnostic (CAD) systems have been developed to address these problems, which automatically classify a HEp-2 cell image into one of its known patterns (eg., speckled, homogeneous). Most of the existing CAD systems use handpicked features to represent a HEp-2 cell image, which may only work in limited scenarios. In this paper, we propose a cell classification system comprised of a dual-region codebook-based descriptor, combined with the Nearest Convex Hull Classifier. We evaluate the performance of several variants of the descriptor on two publicly available datasets: ICPR HEp-2 cell classification contest dataset and the new SNPHEp-2 dataset. To our knowledge, this is the first time codebook-based descriptors are applied and studied in this domain. Experiments show that the proposed system has consistent high performance and is more robust than two recent CAD systems.
The three-dimensional velocity distribution of wide gap Taylor-Couette flow modelled by CFD
Creators: name: Rona, Aldo
name: Adebayo, David S.
Publisher: name: figshare
Year: 2022
Subjects: subject: 90101 Aerodynamics (excl. Hypersonic Aerodynamics)
subject: FOS: Mechanical engineering
subject: 91504 Fluidisation and Fluid Mechanics
subject: FOS: Other engineering and technologies
subject: 91501 Computational Fluid Dynamics
subject: Mechanical Engineering

description: A numerical investigation is conducted for the flow between two concentric cylinders with a wide gap, relevant to bearing chamber applications. This wide gap configuration has received comparatively less attention than narrow gap journal bearing type geometries. The flow in the gap between an inner rotating cylinder and an outer stationary cylinder has been modelled as an incompressible flow using an implicit finite volume RANS scheme with the realisable 𝑘-𝜀 model. The model flow is above the critical Taylor number at which axisymmetric counterrotating Taylor vortices are formed. The tangential velocity profiles at all axial locations are different from typical journal bearing applications, where the velocity profiles are quasilinear. The predicted results led to two significant findings of impact in rotating machinery operations. Firstly, the axial variation of the tangential velocity gradient induces an axially varying shear stress, resulting in local bands of enhanced work input to the working fluid. This is likely to cause unwanted heat transfer on the surface in high torque turbomachinery applications. Secondly, the radial inflow at the axial end-wall boundaries is likely to promote the transport of debris to the junction between the end-collar and the rotating cylinder, causing the build-up of fouling in the seal.
title: Resisting the Shake: Resources for Owners of Older Masonry Buildings
Creators: name: M., Wehner
name: M., Edwards
name: J., Vaculik
name: M., Wehner
Publisher: name: Commonwealth of Australia (Geoscience Australia)
Year: 2022
Subjects: subject: EARTH SCIENCES
subject: Earthquake
subject: Retrofit
subject: Heritage
subject: Unreinforced masonry
subject: Published_External

description: Damaging earthquakes are less frequent in Australia when compared to other weather-related events, but when they do occur close to a community they can cause major damage and injury. This risk to property and life exists for building owners, particularly if the building is of vulnerable construction. The good news is that your building can be retrofitted to improve its earthquake resilience within a sensible budget without compromising its heritage value. This document seeks to show you how. It explains the nature of earthquake risk and provides resources for building owners on how the risk can be reduced for the most vulnerable building construction type: unreinforced masonry.
title: Wind retrofit for older masonry buildings
Creators: name: M., Wehner
name: M., Edwards
Publisher: name: Commonwealth of Australia (Geoscience Australia)
Year: 2022
Subjects: subject: EARTH SCIENCES
subject: Unreinforced masonry
subject: Severe wind
subject: Retrofit
subject: Published_External

description: This document is aimed to be a resource for you when discussing retrofit needs and options with clients and translating their retrofit objectives to detailed design, documentation and implementation. The primary focus is the most vulnerable building construction type in Australia, older unreinforced masonry, but the principles are also informative to address other high risk building types. The objective is cost-effective retrofit measures with minimised disruption to occupants that can address a significant portion of the earthquake risk to the building owner and the community more broadly. It presents information that explains the nature of wind hazard in Western Australia, the risk it presents and the vulnerability factors that contribute to it. It further describes the common failure modes that can be highlighted to clients and a range of measures that can be employed to preclude these. It also links to other resources that can be drawn upon in developing tailored design solutions that the construction industry can readily implement.
SDSS DR7 White Dwarf Catalog
Creators: name: Kleinman, S. J.
name: Kepler, S. O.
name: Koester, D.
name: Pelisoli, Ingrid
name: Peçanha, Viviane
name: Nitta, A.
name: Costa, J. E. S.
name: Krzesinski, J.
name: Dufour, P.
name: Lachapelle, F. -R.
name: Bergeron, P.
name: Yip, Ching-Wa
name: Harris, Hugh C.
name: Eisenstein, Daniel J.
name: Althaus, L.
name: Córsico, A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a new catalog of spectroscopically-confirmed white dwarf stars from the Sloan Digital Sky Survey Data Release 7 spectroscopic catalog. We find 20,407 white dwarf spectra, representing 19,712 stars, and provide atmospheric model fits to 14,120 DA and 1011 DB white dwarf spectra from 12,843 and 923 stars, respectively. These numbers represent a more than factor of two increase in the total number of white dwarf stars from the previous SDSS white dwarf catalog based on DR4 data. Our distribution of subtypes varies from previous catalogs due to our more conservative, manual classifications of each star in our catalog, supplementing our automatic fits. In particular, we find a large number of magnetic white dwarf stars whose small Zeeman splittings mimic increased Stark broadening that would otherwise result in an overestimated log(g) if fit as a non-magnetic white dwarf. We calculate mean DA and DB masses for our clean, non-magnetic sample and find the DB mean mass is statistically larger than that for the DAs.
description: To appear ApJS, January, 2013. The catalog is available as a .csv file via: http://www.astromanager.net/dr7cat/catalog.csv
Computational Particle Physics for Event Generators and Data Analysis
Creators: name: Perret-Gallix, Denis
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: High-energy physics data analysis relies heavily on the comparison between experimental and simulated data as stressed lately by the Higgs search at LHC and the recent identification of a Higgs-like new boson. The first link in the full simulation chain is the event generation both for background and for expected signals. Nowadays event generators are based on the automatic computation of matrix element or amplitude for each process of interest. Moreover, recent analysis techniques based on the matrix element likelihood method assign probabilities for every event to belong to any of a given set of possible processes. This method originally used for the top mass measurement, although computing intensive, has shown its power at LHC to extract the new boson signal from the background. Serving both needs, the automatic calculation of matrix element is therefore more than ever of prime importance for particle physics. Initiated in the eighties, the techniques have matured for the lowest order calculations (tree-level), but become complex and CPU time consuming when higher order calculations involving loop diagrams are necessary like for QCD processes at LHC. New calculation techniques for next-to-leading order (NLO) have surfaced making possible the generation of processes with many final state particles (up to 6). If NLO calculations are in many cases under control, although not yet fully automatic, even higher precision calculations involving processes at 2-loops or more remain a big challenge. After a short introduction to particle physics and to the related theoretical framework, we will review some of the computing techniques that have been developed to make these calculations automatic. The main available packages and some of the most important applications for simulation and data analysis, in particular at LHC will also be summarized.
description: 19 pages, 11 figures, Proceedings of CCP (Conference on Computational Physics) Oct. 2012, Osaka (Japan) in IOP Journal of Physics: Conference Series
Psychological Aspects of Pair Programming
Creators: name: Valový, Marcel
Publisher: name: arXiv
Year: 2023
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences
subject: D.2.7

description: With the recent advent of artificially intelligent pairing partners in software engineering, it is interesting to renew the study of the psychology of pairing. Pair programming provides an attractive way of teaching software engineering to university students. Its study can also lead to a better understanding of the needs of professional software engineers in various programming roles and for the improvement of the concurrent pairing software. Objective: This preliminary study aimed to gain quantitative and qualitative insights into pair programming, especially students' attitudes towards its specific roles and what they require from the pairing partners. The research's goal is to use the findings to design further studies on pairing with artificial intelligence. Method: Using a mixed-methods and experimental approach, we distinguished the effects of the pilot, navigator, and solo roles on (N = 35) students' intrinsic motivation. Four experimental sessions produced a rich data corpus in two software engineering university classrooms. It was quantitatively investigated using the Shapiro-Wilk normality test and one-way analysis of variance (ANOVA) to confirm the relations and significance of variations in mean intrinsic motivation in different roles. Consequently, seven semi-structured interviews were conducted with the experiment's participants. The qualitative data excerpts were subjected to the thematic analysis method in an essentialist way. Results: The systematic coding interview transcripts elucidated the research topic by producing seven themes for understanding the psychological aspects of pair programming and for its improvement in university classrooms. Statistical analysis of 612 self-reported intrinsic motivation inventories confirmed that students find programming in pilot-navigator roles more interesting and enjoyable than programming simultaneously.
description: 6 pages, 2 tables, EASE 2023 conference
Cyclotrons for high-intensity beams
Creators: name: Seidel, Mike
Publisher: name: arXiv
Year: 2013
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: This paper reviews the important physical and technological aspects of cyclotrons for the acceleration of high-intensity beams. Special emphasis is given to the discussion of beam loss mechanisms and extraction schemes.
description: presented at the CERN Accelerator School CAS 2011: High Power Hadron Machines, Bilbao, 24 May - 2 June 2011
Identifying a would-be terrorist: An ineradicable error in the data processing?
Creators: name: Galam, Serge
Publisher: name: arXiv
Year: 2023
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: Processing fragments of data collected on a monitored person to find out whether this person is a would-be terrorist (WT) is very challenging. Moreover, the process has proven to be deceptive, with repeated dramatic failures. To address the issue I suggest a mirror simple model to mimic the process at stake. The model considers a collection of ground items which are labelled either Terrorist Connected (TC) or Terrorist Free (TF). To extract the signal from the ground data items I implement an iterated coarse-grained scheme, which yields a giant unique item with a label TC or TF. The results obtained validate the processing scheme with correct outcomes for the full range of proportions of TC items, beside in a specific sub-range. There, a systematic wrong labelling of the giant item is obtained at the benefit of WT, who are wrongly labeled not would-be terrorist (NWT). This flaw proves to be irremovable because it is anchored within the processing itself in connexion with the treatment of uncertain aggregates, which inevitable appear. The ``natural" allocation of uncertain aggregates to the TF label, in tune with the ethical application of the presumption of innocence in force in democracies, confines the wrong diagnosis systematically to the benefit of some WT, who are labelled NWT. It happens that applying the presumption of guilt, instead of that of innocence, to label the indeterminate aggregates, shifts the systematic errors to another sub-range of proportions of TC items with then zero errors in identifying a WT. But instead, some NWT are wrongly labeled WT. Despite of being quite far from reality, my results suggest that intelligence agencies should investigate the overall effect of seemingly inconsequential "natural" labelling, which are applied locally when data are uncertain with no immediate detectable impact on the data processing.
description: 31 pages, 15 figures
Throughput Analysis of Primary and Secondary Networks in a Shared IEEE 802.11 System
Creators: name: Kumar, Santhosh
name: Shende, Nirmal
name: Murthy, Chandra R.
name: Ayyagari, Arun
Publisher: name: arXiv
Year: 2012
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: In this paper, we analyze the coexistence of a primary and a secondary (cognitive) network when both networks use the IEEE 802.11 based distributed coordination function for medium access control. Specifically, we consider the problem of channel capture by a secondary network that uses spectrum sensing to determine the availability of the channel, and its impact on the primary throughput. We integrate the notion of transmission slots in Bianchi's Markov model with the physical time slots, to derive the transmission probability of the secondary network as a function of its scan duration. This is used to obtain analytical expressions for the throughput achievable by the primary and secondary networks. Our analysis considers both saturated and unsaturated networks. By performing a numerical search, the secondary network parameters are selected to maximize its throughput for a given level of protection of the primary network throughput. The theoretical expressions are validated using extensive simulations carried out in the Network Simulator 2. Our results provide critical insights into the performance and robustness of different schemes for medium access by the secondary network. In particular, we find that the channel captures by the secondary network does not significantly impact the primary throughput, and that simply increasing the secondary contention window size is only marginally inferior to silent-period based methods in terms of its throughput performance.
description: To appear in IEEE Transactions on Wireless Communications
FIRE: An Optimization Approach for Fast Interpretable Rule Extraction
Creators: name: Liu, Brian
name: Mazumder, Rahul
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: We present FIRE, Fast Interpretable Rule Extraction, an optimization-based framework to extract a small but useful collection of decision rules from tree ensembles. FIRE selects sparse representative subsets of rules from tree ensembles, that are easy for a practitioner to examine. To further enhance the interpretability of the extracted model, FIRE encourages fusing rules during selection, so that many of the selected decision rules share common antecedents. The optimization framework utilizes a fusion regularization penalty to accomplish this, along with a non-convex sparsity-inducing penalty to aggressively select rules. Optimization problems in FIRE pose a challenge to off-the-shelf solvers due to problem scale and the non-convexity of the penalties. To address this, making use of problem-structure, we develop a specialized solver based on block coordinate descent principles; our solver performs up to 40x faster than existing solvers. We show in our experiments that FIRE outperforms state-of-the-art rule ensemble algorithms at building sparse rule sets, and can deliver more interpretable models compared to existing methods.
Improved magnetization in sputtered dysprosium thin films
Creators: name: Scheunert, G.
name: Hendren, W. R.
name: Lapicki, A. A.
name: Hardeman, R.
name: Gubbins, M.
name: Bowman, R. M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: 50nm thick nanogranular polycrystalline dysprosium thin films have been prepared via ultra-high vacuum DC sputtering on SiO2 and Si wafers. The maximum in-plane spontaneous magnetization at T = 4K was found to be MS4K = 3.28T for samples deposited on wafers heated to 350C with a Neel point of TN = 173K and a ferromagnetic transition at TC = 80K, measured via zero field cooled field cooled magnetization measurements, close to single crystal values. The slightly reduced magnetization is explained in the light of a metastable face centered cubic crystal phase which occurred at the seed interface and granularity related effects, that are still noticeably influential despite an in-plane magnetic easy axis. As deposited samples showed reduced magnetization of MS4K = 2.26T, however their ferromagnetic transition shifted to a much higher temperature of TC = 172K and the antiferromagnetic phase was completely suppressed probably as a result of strain.
description: 16 pages, 3 figures
Driving--induced bistability in coupled chaotic attractors
Creators: name: Agrawal, Manish
name: Prasad, Awadhesh
name: Ramaswamy, Ram
Publisher: name: arXiv
Year: 2013
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We examine the effects of symmetry--preserving and breaking interactions in a drive--response system where the response has an invariant symmetry in the absence of the drive. Subsequent to the onset of generalized synchronization, we find that there can be more than one stable attractor. Numerical, as well as analytical results establish the presence of phase synchrony in such coexisting attractors. These results are robust to external noise.
description: To be published in Phys. Rev. E. 2013