cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Understanding the Topology and the Geometry of the Space of Persistence Diagrams via Optimal Partial Transport
Creators: name: Divol, Vincent
name: Lacombe, Théo
Publisher: name: arXiv
Year: 2019
Subjects: subject: Computational Geometry (cs.CG)
subject: Geometric Topology (math.GT)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: Despite the obvious similarities between the metrics used in topological data analysis and those of optimal transport, an optimal-transport based formalism to study persistence diagrams and similar topological descriptors has yet to come. In this article, by considering the space of persistence diagrams as a space of discrete measures, and by observing that its metrics can be expressed as optimal partial transport problems, we introduce a generalization of persistence diagrams, namely Radon measures supported on the upper half plane. Such measures naturally appear in topological data analysis when considering continuous representations of persistence diagrams (e.g.\ persistence surfaces) but also as limits for laws of large numbers on persistence diagrams or as expectations of probability distributions on the persistence diagrams space. We explore topological properties of this new space, which will also hold for the closed subspace of persistence diagrams. New results include a characterization of convergence with respect to Wasserstein metrics, a geometric description of barycenters (Fréchet means) for any distribution of diagrams, and an exhaustive description of continuous linear representations of persistence diagrams. We also showcase the strength of this framework to study random persistence diagrams by providing several statistical results made meaningful thanks to this new formalism.
Stylized facts of the Indian Stock Market
Creators: name: Sen, Rituparna
name: S, Manavthi
Publisher: name: arXiv
Year: 2019
Subjects: subject: Statistical Finance (q-fin.ST)
subject: FOS: Economics and business
subject: 62P05, 91B80, 91B84, 62M10

description: Historical daily data for eleven years of the fifty constituent stocks of the NIFTY index traded on the National Stock Exchange have been analyzed to check for the stylized facts in the Indian market. It is observed that while some stylized facts of other markets are also observed in Indian market, there are significant deviations in three main aspects, namely leverage, asymmetry and autocorrelation. Leverage and asymmetry are both reversed making this a more promising market to invest in. While significant autocorrelation observed in the returns points towards market inefficiency, the increased predictive power is better for investors.
Independence Testing for Temporal Data
Creators: name: Shen, Cencheng
name: Chung, Jaewon
name: Mehta, Ronak
name: Xu, Ting
name: Vogelstein, Joshua T.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Machine Learning (stat.ML)
subject: Machine Learning (cs.LG)
subject: Methodology (stat.ME)
subject: FOS: Computer and information sciences

description: Temporal data are increasingly prevalent in modern data science. A fundamental question is whether two time series are related or not. Existing approaches often have limitations, such as relying on parametric assumptions, detecting only linear associations, and requiring multiple tests and corrections. While many non-parametric and universally consistent dependence measures have recently been proposed, directly applying them to temporal data can inflate the p-value and result in an invalid test. To address these challenges, this paper introduces the temporal dependence statistic with block permutation to test independence between temporal data. Under proper assumptions, the proposed procedure is asymptotically valid and universally consistent for testing independence between stationary time series, and capable of estimating the optimal dependence lag that maximizes the dependence. Moreover, it is compatible with a rich family of distance and kernel based dependence measures, eliminates the need for multiple testing, and exhibits excellent testing power in various simulation settings.
description: 19 pages main + 6 pages appendix
title: Action !
title: Formuler des prises de position de façon créative en ligne
titleType: Subtitle
Creators: name: Gaiser, Natascha
Publisher: name: Universität Trier
Year: 2020
Subjects: subject: Digitalisierung
subject: Demokratie
subject: Schule
subject: Unterrichtsforschung
subject: Neue Medien
subject: Informationsquelle
subject: Internet
subject: digitization
subject: democracy
subject: school
subject: digital media
subject: information source
subject: teaching research
subject: digitalissation
subject: démocratie
subject: école
subject: médias digitaux
subject: source d'information

description: Aider les jeunes à s’exprimer constitue un volet important de l’éducation à la démocratie. Dans ce contexte, une des méthodes consiste à laisser les jeunes concevoir les médias qu’ils/elles connaissent le mieux. Cet article examine essentiellement comment mettre en relation le travail de projet créatif avec les médias numériques, et plus précisément, le smartphone.
Découvrir et présenter sa commune avec des activités Actionbound
Creators: name: Frisch, Julia
Publisher: name: Universität Trier
Year: 2020
Subjects: subject: Digitalisierung
subject: Demokratie
subject: Schule
subject: Unterrichtsforschung
subject: Neue Medien
subject: Informationsquelle
subject: Internet
subject: digitization
subject: democracy
subject: school
subject: digital media
subject: information source
subject: teaching research
subject: digitalissation
subject: démocratie
subject: école
subject: médias digitaux
subject: source d'information

description: Combiner l’apprentissage mobile, régional et extrascolaire avec les avantages du recours aux médias numériques : la plateforme Actionbound permet de créer des parcours d’apprentissage numérique par les apprenant(e)s, pour les apprenant(e)s.
Edward R. Hoehl, Jay Hahn and William Pringle, August 1955
Creators: name: Hoehl, Edward R.
name: Hahn, Jay
name: Pringle, William
Publisher: name: Unknown
Year: 1955
Subjects: Stony Brook
Concert halls
Amphitheaters
Correspondence

description: This correspondence is between Edward R. Hoehl, Jay Hahn and William Pringle in August 1955, regarding the cartage bill in connection to Dogwood Hollow.
Automatic continuity, unique Polish topologies, and Zariski topologies on monoids and clones
Creators: name: Elliott, L.
name: Jonušas, J.
name: Mesyan, Z.
name: Mitchell, J. D.
name: Morayne, M.
name: Péresse, Y.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Rings and Algebras (math.RA)
subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20M20, 20M30, 22A15, 54H11

description: In this paper we explore the extent to which the algebraic structure of a monoid $M$ determines the topologies on $M$ that are compatible with its multiplication. Specifically we study the notions of automatic continuity; minimal Hausdorff or Polish semigroup topologies; and we formulate a notion of the Zariski topology for monoids.
 If $M$ is a topological monoid such that every homomorphism from $M$ to a second countable topological monoid $N$ is continuous, then we say that $M$ has \emph{automatic continuity}. We show that many well-known monoids have automatic continuity with respect to a natural semigroup topology, namely: the full transformation monoid $\mathbb{N}^\mathbb{N}$; the full binary relation monoid $B_{\mathbb{N}}$; the partial transformation monoid $P_{\mathbb{N}}$; the symmetric inverse monoid $I_{\mathbb{N}}$; the monoid Inj$(\mathbb{N})$ consisting of the injective functions on $\mathbb{N}$; and the monoid $C(2^{\mathbb{N}})$ of continuous functions on the Cantor set.
 We show that the pointwise topology on $\mathbb{N}^\mathbb{N}$, and its analogue on $P_{\mathbb{N}}$, are the unique Polish semigroup topologies on these monoids. The compact-open topology is the unique Polish semigroup topology on $C(2^\mathbb{N})$ and $C([0, 1]^\mathbb{N})$. There are at least 3 Polish semigroup topologies on $I_{\mathbb{N}}$, but a unique Polish inverse semigroup topology. There are no Polish semigroup topologies $B_{\mathbb{N}}$ nor on the partitions monoids. At the other extreme, Inj$(\mathbb{N})$ and the monoid Surj$(\mathbb{N})$ of all surjective functions on $\mathbb{N}$ each have infinitely many distinct Polish semigroup topologies. We prove that the Zariski topologies on $\mathbb{N}^\mathbb{N}$, $P_{\mathbb{N}}$, and Inj$(\mathbb{N})$ coincide with the pointwise topology; and we characterise the Zariski topology on $B_{\mathbb{N}}$. In Section 7: clones.
description: 52 pages (Some further minor issues resolved, to appear in Trans. Amer. Math. Soc.)
Predicting Classification Accuracy When Adding New Unobserved Classes
Creators: name: Slavutsky, Yuli
name: Benjamini, Yuval
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: Multiclass classifiers are often designed and evaluated only on a sample from the classes on which they will eventually be applied. Hence, their final accuracy remains unknown. In this work we study how a classifier's performance over the initial class sample can be used to extrapolate its expected accuracy on a larger, unobserved set of classes. For this, we define a measure of separation between correct and incorrect classes that is independent of the number of classes: the "reversed ROC" (rROC), which is obtained by replacing the roles of classes and data-points in the common ROC. We show that the classification accuracy is a function of the rROC in multiclass classifiers, for which the learned representation of data from the initial class sample remains unchanged when new classes are added. Using these results we formulate a robust neural-network-based algorithm, "CleaneX", which learns to estimate the accuracy of such classifiers on arbitrarily large sets of classes. Unlike previous methods, our method uses both the observed accuracies of the classifier and densities of classification scores, and therefore achieves remarkably better predictions than current state-of-the-art methods on both simulations and real datasets of object detection, face recognition, and brain decoding.
Seismic performance of high-strength concrete columns in FRP stay-in-place formwork
Creators: name: Ozbakkaloglu, Togay
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2005
Subjects: subject: Engineering, Civil.

description: The use of high-strength concrete (HSC), with strengths reaching 130 MPa, has increased in recent years due to its superior performance and strength. Structures are designed and built utilizing HSC, especially in columns of multi-story buildings. However, the use of high-strength concrete (HSC) in seismically active regions poses a major concern because of the brittle nature of the material. The confinement requirements for HSC columns may be prohibitively stringent since they require proportionately greater confinement than columns of normal-strength concrete. An alternative to conventional confinement reinforcement is the use of fibre reinforced polymer (FRP) casings, in the form of a stay-in-place formwork. The use of stay-in-place FRP formwork as concrete confinement reinforcement for HSC columns was investigated. Large scale HSC building columns, encased in FRP casings, were tested under simulated seismic loading. The columns had 270 mm square and circular cross-sections and concrete strengths up to 90 MPa. The casings were manufactured from carbon FRP and epoxy resin. The unique aspects of the test program were the introduction of the corner radius as a test parameter, and the presence of internally placed FRP crossties in square columns, integrally built with column casings to improve the effectiveness of concrete confinement. Results indicate that the deformation capacity of HSC columns can be improved significantly by using FRP casings. The results further indicate that the confinement effectiveness of square columns is significantly affected by the corner radius of casings. Additionally, the confinement efficiency can be improved with the use of FRP crossties. The columns developed inelastic drift capacities of up to 12%, demonstrating the usefulness of FRP stay-in-place formwork in improving deformability of HSC columns. Fibre-reinforced polymer (FRP) composite casings offer an attractive alternative to conventional reinforcement to enhance strength and deformability of concrete columns. FRP casings can be designed to increase lateral deformability of earthquake resistant columns significantly, while also providing some enhancement of load-carrying capacity. There is a clear need for a design procedure to compute lateral drift capacities of FRP encased square and circular columns. A design approach was developed that incorporates experimentally observed confinement parameters, while also incorporating axial load and lateral drift as design variables. The approach had evolved from a displacement based design procedure developed for concrete columns confined with conventional steel reinforcement. The expression derived as part of the proposed design procedure had been verified against available experimental data. (Abstract shortened by UMI.)
Revitalizing the Existent but Forgotten Bataan Literary Legacy
Creators: name: Loida Lalas Garcia
name: Roldan, Lorna Roberts
name: Aymie Faye Galicia Jaring
name: Ceejay Ong Porgatorio
name: Jayvee David Perez
Publisher: name: Silpakorn University Research and Development Institute
Year: 2020
Subjects: Revitalizing
existent
forgotten
Bataan
literary legacy

description: Humanities, Arts and Social Sciences Studies, 20, 1, 1-26
Soft-input soft-output multiuser detection for coded wireless multiuser systems
Creators: name: Zhang, Wei
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2005
Subjects: subject: Engineering, Electronics and Electrical.
subject: Computer Science.

description: Multiuser detection permits the joint detection of signals from multiple sources. An optimal multiuser detector for coded multiuser systems is usually practically infeasible due to the associated complexity. An iterative receiver consisting of a soft-input soft-output (SISO) multiuser detector and a bank of SISO single user decoders can provide a system performance which approaches to that of the single user system after many iterations. On the other hand, it has a feasible computational complexity. We first propose and analyze three types of SISO multiuser detectors, which are mainly based on the underlying ideas of the traditional (non-SISO) multiuser detectors. These are: decorrelators, linear minimum mean square error (MMSE) detectors and parallel decision feedback detectors. In contrast to these traditional detectors, our SISO multiuser detectors make good use of soft inputs provided by SISO single user decoders and in turn, provide soft outputs to them. The resulting system performance converges quickly, while keeping the computational complexity of the SISO detectors proportional to the number of users cubed. This is a significant complexity reduction in comparison to the optimal detector which has a complexity exponentially proportional to the number of users. Secondly, we consider adaptive SISO multiuser detection. As it is well known, the optimum and many suboptimum SISO multiuser detectors require a lot of a priori information of the multiuser system, such as all users' transmitted waveforms, relative delays as well as the channel impulse response. In this thesis, we apply adaptive algorithms in the SISO multiuser detector in order to avoid the need for this a priori information. We propose two adaptive SISO parallel decision feedback detectors based on the normalized least mean square (NLMS) and recursive least squares (RLS) algorithms for both synchronous and asynchronous direct-sequence code-division multiple-access (DS-CDMA) systems. Compared with traditional non-SISO adaptive detectors, our SISO adaptive detectors effectively exploit the a priori information of coded symbols to further improve their convergence performance. This a priori information is obtained from a bank of single user decoders. Monte-Carlo simulation results are presented and compared. Moreover, we extend adaptive SISO parallel decision feedback detection to asynchronous DS-CDMA systems over slow frequency non-selective Rayleigh fading channels.
Accurate 3D fireball trajectory and orbit calculation using the 3D-FireTOC automatic Python code
Creators: name: Peña-Asensio, Eloy
name: Trigo-Rodríguez, Josep Maria
name: Gritsevich, Maria
name: Rimola, Albert
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The disruption of asteroids and comets produces cm-sized meteoroids that end up impacting the Earth's atmosphere and producing bright fireballs that might have associated shock waves or, in geometrically-favorable occasions excavate craters that put them into unexpected hazardous scenarios. The astrometric reduction of meteors and fireballs to infer their atmospheric trajectories and heliocentric orbits involves a complex and tedious process that generally requires many manual tasks. To streamline the process, we present a software package called SPMN 3D Fireball Trajectory and Orbit Calculator (3D-FireTOC), an automatic Python code for detection, trajectory reconstruction of meteors, and heliocentric orbit computation from video recordings. The automatic 3D-FireTOC package comprises of a user interface and a graphic engine that generates a realistic 3D representation model, which allows users to easily check the geometric consistency of the results and facilitates scientific content production for dissemination. The software automatically detects meteors from digital systems, completes the astrometric measurements, performs photometry, computes the meteor atmospheric trajectory, calculates the velocity curve, and obtains the radiant and the heliocentric orbit, all in all quantifying the error measurements in each step. The software applies corrections such as light aberration, refraction, zenith attraction, diurnal aberration and atmospheric extinction. It also characterizes the atmospheric flight and consequently determines fireball fates by using the $α- β$ criterion that analyses the ability of a fireball to penetrate deep into the atmosphere and produce meteorites. We demonstrate the performance of the software by analyzing two bright fireballs recorded by the Spanish Fireball and Meteorite Network (SPMN).
description: Published on 10 April 2021
Disenchanting the End: Secular Apocalyptic Visions in 20th Century Boys
Creators: name: Bancha Rattanamathuwong
Publisher: name: Silpakorn University Research and Development Institute
Year: 2020
Subjects: 20thCentury Boys
Naoki Urasawa
post-apocalypticism

description: Humanities, Arts and Social Sciences Studies, 20, 1, 27-41
Le sujet de la numérisation dans l’enseignement - Introduction
Creators: name: Hoegener, Steve
name: Weyler, Daniel
Publisher: name: Universität Trier
Year: 2020
Subjects: subject: Digitalisierung
subject: Demokratie
subject: Schule
subject: Unterrichtsforschung
subject: Neue Medien
subject: Informationsquelle
subject: Internet
subject: digitization
subject: democracy
subject: school
subject: digital media
subject: information source
subject: teaching research
subject: digitalissation
subject: démocratie
subject: école
subject: médias digitaux
subject: source d'information

description: Cet article présente une méthode qui permet aux enseignant(e)s de se faire une idée de l’expérience que les élèves ont des médias numériques et de leur maîtrise du numérique. Elle demande peu de préparation et n’exige pas de connaissances préalables de la part des enseignant(e)s. Cet exercice permet de détendre l’atmosphère en classe et de déterminer dans quelle mesure les élèves réfléchissent déjà à l’usage qu’ils/elles font des médias numériques.
title: KonterBUNT
title: apprendre à réagir aux propos méprisants
titleType: Subtitle
Creators: name: Rieb, Mikis
name: Kallinich, Daniela
Publisher: name: Universität Trier
Year: 2020
Subjects: subject: Digitalisierung
subject: Demokratie
subject: Schule
subject: Unterrichtsforschung
subject: Neue Medien
subject: Informationsquelle
subject: Internet
subject: digitization
subject: democracy
subject: school
subject: digital media
subject: information source
subject: teaching research
subject: digitalissation
subject: démocratie
subject: école
subject: médias digitaux
subject: source d'information

description: Les médias numériques peuvent contribuer à aborder les contenus de l’enseignement de façon motivante et compréhensible et à développer les capacités d’action démocratique des élèves. L’application « KonterBUNT. Einschreiten für Demokratie » (Intervenir pour la démocratie) aide les jeunes à appendre à réagir aux propos méprisants.
Using fireball networks to track more frequent reentries: Falcon 9 upper stage orbit determination from video recordings
Creators: name: Peña-Asensio, Eloy
name: Trigo-Rodríguez, Josep M.
name: Langbroek, Marco
name: Rimola, Albert
name: Robles, Antonio J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: On February 16, 2021, an artificial object was recorded by the Spanish Meteor Network (SPMN) moving slowly over the Mediterranean. From the astrometric measurements, we identify this event as the reentry engine burn of a SpaceX Falcon 9 launch vehicle's upper stage. To study this event in detail, we adapted the plane intersection method for near-straight meteoroid trajectories to analyze slow and curved orbits associated with artificial objects. To corroborate our results, we approximated the orbital elements for the upper stage using four pieces of "debris" cataloged by the U.S. Government Combined Space Operations Center (CSpOC). Based on these calculations, we also estimated the possible deorbit hazard zone using the MSISE90 model atmosphere. We warn of the interference that these artificial bolides might have in fireball studies. In addition, given that artificial bolides will be probably more frequent in the future, we point out the new role that ground-based detection networks can play in the monitoring of potentially hazardous artificial objects in near-Earth space and determining the strewn field of artificial space debris.
description: Astrodynamics Journal (in press)
A hybrid application-layer multicasting protocol for distributed simulations on the Internet
Creators: name: Diabi, Abdelfettah
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2006
Subjects: subject: Computer Science.

description: IP multicast is typically used to support message transmission among entities in collaborative virtual simulations running on Intranets, especially military training simulations. But, IP Multicast is mostly not available on the Internet because it is not deployable by ISP's due to undefined billing at the source and unlimited amount of overlay topologies for data transmission. Alternatively, researches have in recent years proposed the use of Application Layer Multicasting techniques (ALM) to alleviate this problem and to allow a somewhat scalable message passing among peers in a group of users on the Internet. As the number of users grows in the session, efficient handling of resources and scalable communication between users becomes critical due to network traffic and computation required to track all objects in the session. In this thesis, peer-to-peer communication architecture for distributed simulation is proposed. The architecture uses both proxies and end-systems to provide a number of communication services: (1) Best effort LAN multicast; (2) Timely-reliable LAN multicast; (3) Best effort peer to peer delivery on the Internet; (4) Timely-reliable peer to peer delivery on the Internet, and (5) Any combination of the above, including LAN to Internet translation and vice versa. The main achievement of this research could be summarized as the design, justification, and implementation of an architecture that, in comparison to others, has higher efficiency and guaranteed reliability for performing tightly synchronous collaborative tasks in Collaborative Virtual Environments (CVEs).
Participation rate in CS: one international issue or multiplicity of national ones?
Creators: name: Carter, Janet
name: Fraser, Karen
name: Jenkins, Tony
name: Lang, Catherine
name: Kurkovsky, Stanislav
name: Tymann, Paul
Publisher: name: Swinburne
Year: 2024

description: The proportion of female students studying Computing related subjects at undergraduate-degree level is decreasing. This decline in the number of female applicants for Computer Science (CS) degree programs is undoubtedly worrying. In the early 1980s some 35% of applicants for CS degrees at UK Universities were women, but now the figure is closer to 10%; this statistic is not confined to one country. Some countries such as Ireland and India do buck the trend, but is there a commonality between the decreases seen in many countries? As individuals, we undertake work based upon our own students, or students from our own country but rarely if ever seek international comparisons. If we are to work effectively together across nationalities we need to determine whether we are all suffering the same problem or different problems with the same symptom. This paper presents the results of an international comparison of student interviews.
Towards building a fault tolerant and conflict-free distributed file system for mobile clients
Creators: name: AlShaikh, Raed A
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2006
Subjects: subject: Computer Science.

description: The rising demand for mobile computing has created a need for improved file systems that support mobile clients. Current file systems with support for mobility provide availability through file replicas that are cached at the client side. However, mobile clients may experience different obstacles in regard to the local cache, such as the intermittent connection, and serious conflicts when synchronizing back to the server. In this thesis, we present a comprehensive classification of distributed and mobile file systems, and propose a novel distributed file system model for mobile clients with cacheless wireless devices. We discuss the implementation of our model, investigate its high availability functions and report on its performance evaluation using a cluster of workstations as a test-bed. Our test run results indicate clearly that our technique exhibits a significant degree of automation and conflict-free mobile file system. Last but not least, we have proposed a novel scheme based on the FBR scheme and file pre-fetching to enhance the server-side caching strategy of our distributed file system. We present our scheme and discuss its evaluation performance using an extensive set of experiments.
The persistence of steroidal estrogens in the aquatic environment
Creators: name: Atkinson, Susanna Kate
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2009
Subjects: subject: Health Sciences, Toxicology.
subject: Environmental Health.
subject: Water Resource Management.

description: The presence and fate of the steroidal estrogens, estrone (E1), 17beta-estradiol (E2) and 17alpha-ethinylestradiol (EE2), in Ottawa and Cornwall wastewater treatment plants (WWTP's), drinking water, and the river water used as the drinking water source, were identified. Estrogens were extracted using accelerated solvent extraction, gel permeation chromatography and solid phase extraction, and identified using gas chromatography-mass spectrometry and internal C-13 standards. E1, E2 and EE2 concentrations ranged from 1.8 to 370, 24.3 to 66.9 and 0.4 to 9.8 ng L-1, respectively, and were affected by weather variables such as temperature and precipitation, and WWTP parameters such as daily flow and carbonaceous biochemical oxygen demand. Photodegradation rate constants under ultraviolet B radiation for E1 were directly proportional to radiation intensity and sample thickness, and inversely proportional to dissolved organic carbon concentration, but EE2 was remarkably persistent. A luciferase reporter gene assay found estrogenicity in both sewage effluent and UVB-exposed samples of estrogens, contributed by the degradation products of steroidal estrogens. Finally, EE2 persistence was also seen in a time-course experiment in which goldfish were exposed to 25 ng L-1 EE2. A mass-balance model calculated a bioconcentration factor (BCF) for EE2 in fish blood of 1400, whereas measured data revealed a maximum BCF of only 500.
Building visualization skills through investigating the Journal of the Medical Library Association coauthorship network from 2006–2017
Creators: name: Reznik-Zellen, Rebecca
name: Carroll, Alexander J.
name: Harrington, Eileen G.
name: Joubert, Douglas James
name: Nix, Tyler
name: Alpi, Kristine M.
Publisher: name: Journal of the Medical Library Association
Year: 2020
Subjects: Data visualization
Network analysis
Medical librarianship
Health librarianship

description: Objective: The primary objective of this study was to explore different dimensions of Journal of the Medical Library Association (JMLA) authorship from 2006-2017. Dimensions that were evaluated using coauthorship networks and affiliation data included collaboration, geographical reach, and relationship between Medical Library Association (MLA) member and nonmember authors. A secondary objective was to analyze the practice and practical application of data science skills. Methods: A team of librarians who attended the 2017 Data Science and Visualization Institute used JMLA bibliographic metadata extracted from Scopus, together with select MLA membership data from 2006-2017. Data cleaning, anonymization, analysis, and visualization were done collaboratively by the team members to meet their learning objectives and to produce insights about the nature of collaborative authorship at JMLA. Results: Sixty-nine percent of the 1,351 JMLA authors from 2006-2017 were not MLA members. MLA members were more productive and collaborative, and tended to author articles together. The majority of the authoring institutions in JMLA are based in the United States. Global reach outside of the United States and Canada shows higher authorship in English-speaking countries (e.g., Australia, United Kingdom), as well as in Western Europe and Japan. Conclusions: MLA support of JMLA may benefit a wider network of health information specialists and medical professionals than is reflected in MLA membership. Conducting coauthorship network analyses can create opportunities for health sciences librarians to practice applying emerging data science and data visualization skills.
Discrete connections on principal bundles: the Discrete Atiyah Sequence
Creators: name: Fernandez, Javier
name: Juchani, Mariana
name: Zuccalli, Marcela
Publisher: name: arXiv
Year: 2021
Subjects: subject: Differential Geometry (math.DG)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 53C05 (Primary) 53C15, 70G45 (Secondary)

description: In this work we study discrete analogues of an exact sequence of vector bundles introduced by M. Atiyah in 1957, associated to any smooth principal $G$-bundle $π:Q\rightarrow Q/G$. In the original setting, the splittings of the exact sequence correspond to connections on the principal bundle $π$. The discrete analogues that we consider here can be studied in two different categories: the category of fiber bundles with a (chosen) section, FBS, and the category of local Lie groupoids, lLgpdC. In FBS we find a correspondence between a) (semi-local) splittings of the discrete Atiyah sequence (DAS) of $π$, b) discrete connections on the same bundle $π$, and c) isomorphisms of the DAS with certain fiber product extensions in FBS. We see that the right splittings of the DAS (in FBS) are not necessarily right splittings in lLgpdC: we use this obstruction to define the discrete curvature of a discrete connection. Then, there is a correspondence between the splittings of the DAS in lLgpdC and discrete connections with trivial discrete curvature. We also introduce a semidirect product between (some) local Lie groupoids and prove that there is a correspondence between semidirect product extensions and splittings of the DAS in lLgpdC.
description: Streamlined version, same main results
From impact refugees to deterritorialized states: foresighting extreme legal-policy cases in asteroid impact scenarios
Creators: name: Simó-Soler, Elisa
name: Peña-Asensio, Eloy
Publisher: name: arXiv
Year: 2021
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Throughout recorded history, humans have crossed national borders to seek safety in nearby countries. The reasons for displacement have been generated by phenomena of terrestrial origin, but exposure to unexpected extra-terrestrial threats poses a different scenario. An asteroid impact warning implies a change of paradigm which would represent a historic precedent. In this regard, the analogies with natural disasters must be considered, along with multiple possible scenarios, and legal aspects related to a) the legal framework to regulate this situation; b) the action and responsibility of the states; and c) the definition of impact refugee and the reconfiguration of traditional concepts such as deterritorialized states. In addition, the decision-making process and the actors involved must be led by a cooperative effort to improve international law. These new circumstances should be established with a consideration of inequalities between the states, and an aim of protecting humanity through democratic solutions using the safest, most effective techniques.
Effect of Inlet Temperature Non-Uniformity on High-Pressure Turbine Performance
Creators: name: Smith, Craig I
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2010
Subjects: subject: Engineering, Biomedical.

description: The temperature of the flow entering a high-pressure turbine stage is inherently non-uniform, as it is produced by several discrete, azimuthally-distributed combustors. In general, however, industrial simulations assume inlet temperature uniformity to simplify the preparation process and reduce computation time. The effects of a non-uniform inlet field on the performance of a commercial, transonic, single-stage, high-pressure, axial turbine with a curved inlet duct have been investigated numerically by performing URANS (Unsteady Reynolds-Averaged Navier-Stokes equations) simulations with the SST (Shear Stress Transport) turbulence model. By adjusting the alignment of the experimentally-based inlet temperature field with respect to the stator vanes, two clocking configurations were generated: a vane-impinging (VI) case, in which each hot streak impinged on a vane; and a mid-pitch (MP) case, in which each hot streak passed between two vanes. In the VI configuration, the hot streaks produced higher time-averaged heat load on the vanes and lower heat load on the blades. As the hot streaks in the VI case passed over the stator vanes, they also spread spanwise due to the actions of the casing passage vortices and the radial pressure gradient; this resulted in a stream entering the rotor with relatively low temperature variations. The hot streaks in the MP case were convected undisturbed past the relatively cool vane section. Relatively high time-averaged enthalpy values were found to occur on the pressure side of the blades in the MP configuration. The non-uniformity of the time-averaged enthalpy on the blade surfaces was lower in the VI configuration. The flow exiting the rotor section was much less non-uniform in the VI case, but differences in calculated efficiency were not significant.
Developing English for Tour Guides Material: Khmer Sanctuary Guides
Creators: name: Prapaporn Sompakdee
name: Uthaivan Danvivath
Publisher: name: Silpakorn University Research and Development Institute
Year: 2020
Subjects: Needs analysis
material development
Khmer sanctuaries

description: Humanities, Arts and Social Sciences Studies, 20, 1, 42-64
Job Needs and Task Analysis of Japanese-Speaking Thai Translators and Interpreters: Implications for Japanese Language Education
Creators: name: Kazuharu Yamamoto
Publisher: name: Silpakorn University Research and Development Institute
Year: 2020
Subjects: Translationand interpretingeducation
Japanese language education
needs analysis
competency
Japanese-speaking Thai translatorsand interpreters

description: Humanities, Arts and Social Sciences Studies, 20, 1, 65-89
Concrete columns and beams reinforced with FRP bars and grids under monotonic and reversed cyclic loading
Creators: name: Sharbatdar, Mohammad-Kazem
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2003
Subjects: subject: Engineering, Civil.

description: The use of fiber reinforced polymer (FRP) reinforcement is currently being explored by the construction industry as a new and innovative material. A significant force behind this consideration is the superior performance of FRP material in corrosive environments. FRP possesses high strength-to-weight ratio, favorable fatigue strength, and low relaxation characteristics when compared with steel reinforcement, offering economically and structurally sound alternative for most applications. The majority of current FRP applications have been in the area of rehabilitation and strengthening of existing structures, although some attempts have been made for application to new construction. The research program consisted of four phases; (i) columns under eccentric monotonic loading; (ii) reinforced cylinders under concentric compression; (iii) columns under constant axial compression and lateral load reversals, and (iv) cantilever beams subjected lateral monotonic or cyclic loading. The results of tests conducted at the Structures Laboratory of the University of Ottawa indicate that CFRP reinforcement can be used effectively in new concrete members. CFRP reinforced columns subjected to eccentric loading were able to develop their expected moment capacities as governed by the crushing of concrete. All columns under cyclic loading sustained a lateral drift level exceeding 2% and 2.5% limits specified for earthquake resistant columns in the National Building Code of Canada (1995, 2005). Failure in these columns was initiated by the spalling of concrete cover, followed by the buckling of FRP bars in compression at approximately 0.45% to 0.60% compressive strain, and subsequent crushing of the core concrete. The failure of FRP bars in compression was due to instability. The stability failure of FRP bars in compression was different than that observed in steel reinforcing bars. The hysteretic relationship of flexure dominant FRP reinforced beams indicated stiffness degradation under cyclic loading due to the progressive cracking of concrete and associated softening in the member, developing approximately 3% lateral drift ratio prior to failure. This level of lateral drift may be considered to be sufficient for earthquake resistant construction. All the flexure dominant members developed their flexural capacities computed on the basis of plane-strain analysis. (Abstract shortened by UMI.)
Limit pretrees for free group automorphisms: existence
Creators: name: Mutanguha, Jean Pierre
Publisher: name: arXiv
Year: 2021
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20F65, 20E05, 20E36

description: To any free group automorphism, we associate a real pretree with several nice properties. First, it has a rigid/non-nesting action of the free group with trivial arc stabilizers. Secondly, there is an expanding pretree-automorphism of the real pretree that represents the free group automorphism. Finally and crucially, the loxodromic elements are exactly those whose (conjugacy class) length grows exponentially under iteration of the automorphism; thus, the action on the real pretree is able to detect the growth type of an element.
 This construction extends the theory of metric trees that has been used to study free group automorphisms. The new idea is that one can equivariantly blow up an isometric action on a real tree with respect to other real trees and get a rigid action on a treelike structure known as a real pretree. Topology plays no role in this construction as all the work is done in the language of pretrees (intervals).
description: 41 pages, 1 figure. v2: 40 pages, referenced the sequel. v3: 41 pages, incorporated referee comments
Bayesian Testing Of Granger Causality In Functional Time Series
Creators: name: Sen, Rituparna
name: Majumdar, Anandamayee
name: Sikaria, Shubhangi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Methodology (stat.ME)
subject: Statistical Finance (q-fin.ST)
subject: Applications (stat.AP)
subject: FOS: Computer and information sciences
subject: FOS: Economics and business

description: We develop a multivariate functional autoregressive model (MFAR), which captures the cross-correlation among multiple functional time series and thus improves forecast accuracy. We estimate the parameters under the Bayesian dynamic linear models (DLM) framework. In order to capture Granger causality from one FAR series to another we employ Bayes Factor. Motivated by the broad application of functional data in finance, we investigate the causality between the yield curves of two countries. Furthermore, we illustrate a climatology example, examining whether the weather conditions Granger cause pollutant daily levels in a city.
Profil Pondok Pesantren Al Hikmah Karangmojo Gunungkidul 2019-2020
Creators: name: Taqiyuddin, Muhammad
name: Rahmawati, Fitra Awalia
Publisher: name: Zenodo
Year: 2020
Subjects: profil
Al Hikmah Karangmojo
Pusdiklat al Hikmah Karangmojo

description: Profil Pondok Pesantren al Hikmah Karangmojo yang dibuat tahun ajaran 2019-2020. Kerjasama lembaga Pusat Pendidikan dan Pelatihan Pengabdian dengan lembaga formal seperti SMP Al Hikmah, SMK dan MA al Hikmah.
Stereocontrolled diversity oriented synthesis of 2H-benzopyran-based natural product-like polycyclics
Creators: name: Cumaranatunga-Ilangasinghe, P. Kamani
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2005
Subjects: subject: Chemistry, Organic.

description: Over the years, it has been shown that natural products that act as highly specific modulators of protein function are complex in nature, highly functionalized and contain few stereogenic centers. There are several examples in literature, where benzopyran-based natural products have been utilized as small molecule chemical probes in understanding protein function. Inspired by the "privileged benzopyrans", the studies reported in this thesis are centred on the development of a novel method leading to the synthesis of functionalized benzopyran-derived scaffolds. Further, several attempts have been made to obtain natural product-like polycyclic compounds as derivatives of these scaffolds. Our approach has been to develop the synthetic methods initially by solution synthesis. In one case, a partial solid phase synthesis has been achieved that could further be extended to library generation. The synthetic efforts to obtain several benzopyran-based analogs are reported. These include the development of a novel, stereoselective synthetic route to obtain functionalized benzopyran templates (71a,b) and further extensions leading to diverse tricyclic derivatives having medium sized rings with few asymmetric diversity sites. An intramolecular Mitsunobu-based approach was explored to obtain benzopyran-derived tricyclic derivatives having a cis- and trans-fused lactone moiety ( 72, 73). Although we were successful in making the amino acid conjugates (387, 392, 395), we were not successful in making their tricyclic derivatives. Several ring closing metathesis (RCM)-based approaches were also developed to obtain benzopyran-based tricyclic derivatives having functionalized 6- and 8-membered rings, and were successful in making the polyethers ( 74, 75). Also reported in this chapter is the preliminary work on solid phase synthesis in which benzopyran-based tricyclic compounds with 6- and 8-membered rings were obtained by a RCM approach (541a,b).
Class act: Googie Withers and John McCallum
Creators: name: McFarlane, Brian
Publisher: name: Swinburne
Year: 2024

description: As I talked to the McCallums in May this year, I had to keep reminding myself that they are both in their nineties and that they've been in the business of entertaining us for over seventy years. Anyone who saw them in any of the films or plays in which they co-starred will know how well they played together professionally. As you watch them together now, complementing (and complimenting) each other, you can't help wondering how much of their professional success was a spin-off from a stimulating partnership off-screen or off-stage. It seems timely to pay tribute to them for what they achieved in the performing arts in Australia and elsewhere.
A Recommender System using Tag-based Collaborative User Model
Creators: name: Alkhaldi, Abdulmajeed
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2011
Subjects: subject: Engineering, System Science.

description: Internet users are overwhelmed by a huge media amount available online. Therefore there is a need of an automated way to make compelling recommendations to users according to their needs. There have been many research efforts to reduce that huge amount of content to what the user really needs or prefers. Recommender systems assisting users in easily finding the useful information, are a main research topic that serves this area. According to techniques recommender systems employ, they are mainly classified into three categories: a collaborative-based filtering, content-based filtering, and hybrid filtering. Collaborative filtering relies on the collaboration of users by capturing their judgments on items, and then recommends these items to users with similar taste. Content-based filtering takes advantage of content of a user's preferred items and recommends new items that have similar content. Hybrid filtering takes advantage of both collaborative and content- based filtering and might be in a different ways. No matter what the technique is used, recommender systems require an accurate user model that can reflect a user's characteristics, preferences, and topics of interest. In addition, the systems should take into account users who newly join the systems and thus has presented few opinions, commonly referred to as the cold start users problem. In our research, by leveraging user-generated tags, we propose the topic-driven enriched user model (EM), which is a new way of modeling a user's topics of interest in collaboration with other similar users, in order to improve the recommendation quality and alleviate the cold start user problem. We also present how the proposed model is applied to item recommendations by using locally weighted naive Bayes approach. For evaluating the performance of our model, we compare experimental results with a user model based on user-based collaborative filtering, a user model based on an item-based collaborative filtering, and a vector space model. The experimental results shows that EM outperforms the three algorithms in both recommendation quality and the cold start situation.