cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Multiband Gravitational-Wave Astronomy: Observing binary inspirals with a decihertz detector, B-DECIGO
Creators: name: Isoyama, Soichiro
name: Nakano, Hiroyuki
name: Nakamura, Takashi
Publisher: name: arXiv
Year: 2018
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: An evolving Japanese gravitational-wave (GW) mission in the deci-Hz band: B-DECIGO (DECihertz laser Interferometer Gravitational wave Observatory) will enable us to detect GW150914-like binary black holes, GW170817-like binary neutron stars, and intermediate-mass binary black holes out to cosmological distances. The B-DECIGO band slots in between the aLIGO-Virgo-KAGRA-IndIGO (hecto-Hz) and LISA (milli-Hz) bands for broader bandwidth; the sources described emit GWs for weeks to years across the multiband to accumulate high signal-to-noise ratios. This suggests the possibility that joint detection would greatly improve the parameter estimation of the binaries. We examine B-DECIGO's ability to measure binary parameters and assess to what extent multiband analysis could improve such measurement. Using non-precessing post-Newtonian waveforms with the Fisher matrix approach, we find for systems like GW150914 and GW170817 that B-DECIGO can measure the mass ratio to within $< 0.1\%$, the individual black-hole spins to within $< 10\%$, and the coalescence time to within $< 5\,$s about a week before alerting aLIGO and electromagnetic facilities. Prior information from B-DECIGO for aLIGO can further reduce the uncertainty in the measurement of, e.g., certain neutron star tidally-induced deformations by factor of $\sim 6$, and potentially determine the spin-induced neutron star quadrupole moment. Joint LISA and B-DECIGO measurement will also be able to recover the masses and spins of intermediate-mass binary black holes at percent-level precision. However, there will be a large systematic bias in these results due to post-Newtonian approximation of exact GW signals.
description: v3: 22 pages, 2 figures, matches the published version
Expressive Motion for Low Degree-of-Freedom Robots
Creators: name: Knight, Heather
Publisher: name: Carnegie Mellon University
Year: 2016
Subjects: subject: 80101 Adaptive Agents and Intelligent Robotics
subject: FOS: Computer and information sciences

description: As social and collaborative robots move into everyday life, the need for algorithms enabling their acceptance becomes critical. People parse non-verbal communications intuitively, even from machines that do not look like people, thus, expressive motion is a natural and efficient way to communicate with people. This work presents a computational Expressive Motion framework allowing simple robots to modify task motions to communicate varying internal states, such as task status, social relationships, mood (e.g., emotive) and/or attitude (e.g., rushed, confident). By training robot motion features with humans in the loop, future robot designers can use this approach to parametrize how a robot generates its task motions. The hypothesis of this Thesis is that robots can modify the motion features of their task behaviors such to legibly communicate a variety of states. Typically, researchers build instances of expressive motion into individual robot behaviors (which is not scalable), or use an independent channel such as lights or facial expressions that do not interfere with the robot's task. What is unique about this work is that we use the same modality to do both task and expression: the robot's joint and whole-body motions. While this is not the only way for a robot to communicate expression, Expressive Motion is a channel available to all moving machines, which can work in tandem with additional communication modalities. Our methodological approach is to operationalize the Laban Effort System, a well-known technique from acting training, describing a four-dimensional state space of Time, Weight, Space and Flow. Thus, our Computational Laban Effort (CLE) framework can use four values, the Laban Effort Setting, to represent a robot's current state. Each value is reflected in the motion characteristics of the robot's movements. For example, a Laban Time Effort of `sudden' might have more abrupt accelerations and fast velocity, while a Laban Time Effort value of `sustained' could have slower acceleration and low velocity. In our experiments, we find that varying these four Effort values results in complex communications of robot state to the people around it, even for robots with low degrees of freedom. The technical contributions of this work include: 1. A Computational Laban Effort framework for layering Expressive Motion features onto robot task behaviors, fully specified for low degree of freedom robots. 2. Specifications for selecting, exploring and making generalizations about how to map these motion features to particular robot state communications. 3. Experimental studies of human-robot interaction to evaluate the legibility, attributions and impact of these technical components. 4. Sample evaluations of approaches to establish mappings between CLE features and state communications.
The partition function of 2d string theory
Creators: name: Dijkgraaf, R.
name: Moore, G.
name: Plesser, R.
Publisher: name: arXiv
Year: 1992
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We derive a compact and explicit expression for the generating functional of all correlation functions of tachyon operators in 2D string theory. This expression makes manifest relations of the $c=1$ system to KP flow and $W_{1+\infty}$ constraints. Moreover we derive a Kontsevich-Penner integral representation of this generating functional.
description: 28 pages, 3 figures not included, harvmac. Preprint IASSNS-HEP-92/48, YCTP-P22-92
The causal boundary of wave-type spacetimes
Creators: name: Flores, José Luis
name: Sánchez, Miguel
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: A complete and systematic approach to compute the causal boundary of wave-type spacetimes is carried out. The case of a 1-dimensional boundary is specially analyzed and its critical appearance in pp-wave type spacetimes is emphasized. In particular, the corresponding results obtained in the framework of the AdS/CFT correspondence for holography on the boundary, are reinterpreted and very widely generalized. Technically, a recent new definition of causal boundary is used and stressed. Moreover, a set of mathematical tools is introduced (analytical functional approach, Sturm-Liouville theory, Fermat-type arrival time, Busemann-type functions).
description: 41 pages, 1 table. Included 4 new figures, and some small modifications. To appear in JHEP
Asian-Indigenous Relationalities: Literary Gestures of Respect and Gratitude
Creators: name: Phung, Malissa
Publisher: name: Canadian Literature
Year: 2016

description: Lee Maracle’s (Stó:lō) “Yin Chin” and SKY Lee’s Disappearing Moon Café have inaugurated a literary tradition of acknowledging and restoring Asian-Indigenous relations in the field of Asian Canadian studies. This study extends their intertextual conversation on the impact of racism and colonialism on Asian-Indigenous relations to consider the ways in which contemporary Asian Canadian settler citizens, migrants, and refugees may inherit not only the legacies of white supremacy, global capital, and settler colonialism but also the historical and ongoing relations of Sino-Indigenous indebtedness. Presenting an allegorical reading of Asian-Indigenous relations through scenes of settler/migrant/refugee indebtedness and gratitude represented in several Chinese Canadian literary texts, as well as Kim Thúy’s Ru, I argue that the literary tradition of Sino-Indigenous indebtedness has the capacity to generate a sense of mutuality and self-critique amongst all Asian Canadians to consider their role and responsibilities within the structures of settler colonialism, particularly within Asian migrant and refugee communities shaped by an enduring sense of gratitude towards the state for being granted a new life on colonized lands.
description: Canadian Literature, No 227 (2015): Asian Canadian Critique Beyond the Nation
Mechanisms for Primordial Black Hole Production in String Theory
Creators: name: Özsoy, Ogan
name: Parameswaran, Susha
name: Tasinato, Gianmassimo
name: Zavala, Ivonne
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We consider mechanisms for producing a significant population of primordial black holes (PBHs) within string inspired single field models of inflation. The production of PBHs requires a large amplification in the power spectrum of curvature perturbations between scales associated with CMB and PBH formation. In principle, this can be achieved by temporarily breaking the slow-roll conditions during inflation. In this work, we identify two string setups that can realise this process. In string axion models of inflation, subleading non-perturbative effects can superimpose steep cliffs and gentle plateaus onto the leading axion potential. The cliffs can momentarily violate the slow-roll conditions, and the plateaus can lead to phases of ultra slow-roll inflation. We thus achieve a string motivated model which both matches the Planck observations at CMB scales and produces a population of light PBHs, which can account for an order one fraction of dark matter. In DBI models of inflation, a sharp increase in the speed of sound sourced by a steep downward step in the warp factor can drive the amplification. In this scenario, discovery of PBHs could indicate non-trivial dynamics in the bulk, such as flux-antibrane annihilation at the tip of a warped throat.
description: 37 pages, 14 figures, published version, typos fixed, references added
Quantum Gravity, Dynamical Triangulation and Higer Derivative Regularization
Creators: name: Ambjorn, J.
name: Jurkiewicz, J.
name: Kristjansen, C. F.
Publisher: name: arXiv
Year: 1992
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We consider a discrete model of euclidean quantum gravity in four dimensions based on a summation over random simplicial manifolds. The action used is the Einstein-Hilbert action plus an $R^2$-term. The phase diagram as a function of the bare coupling constants is studied in the search for a sensible continuum limit. For small values of the coupling constant of the $R^2$ term the model seems to belong to the same universality class as the model with pure Einstein-Hilbert action and exhibits the same phase transition. The order of the transition may be second or higher. The average curvature is positive at the phase transition, which makes it difficult to understand the possible scaling relations of the model.
description: 27 pages (Latex), figures not included. Post script file containing 15 figures (1000 blocks) available from kristjansen@nbivax.nbi.dk.
Axion interferometry
Creators: name: DeRocco, William
name: Hook, Anson
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We propose using interferometry of circularly polarized light as a mechanism by which to test for axion dark matter. These interferometers differ from standard interferometers only by the addition of a few quarter waveplates to preserve the polarization of light upon reflection. We show that using current technology, interferometers can probe new regions of axion parameter space up to a couple orders of magnitude beyond current constraints.
description: 5 pages, 5 figures
Search for disappearing tracks as a signature of new long-lived particles in proton-proton collisions at $\sqrt{s} =$ 13 TeV
Creators: name: CMS Collaboration
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: A search is presented for long-lived charged particles that decay within the CMS detector and produce the signature of a disappearing track. A disappearing track is an isolated track with missing hits in the outer layers of the silicon tracker, little or no energy in associated calorimeter deposits, and no associated hits in the muon detectors. This search uses data collected with the CMS detector in 2015 and 2016 from proton-proton collisions at a center-of-mass energy of 13 TeV at the LHC, corresponding to an integrated luminosity of 38.4 fb$^{-1}$. The results of the search are interpreted in the context of the anomaly-mediated supersymmetry breaking model. The data are consistent with the background-only hypothesis. Limits are set on the product of the cross section for direct production of charginos and their branching fraction to a neutralino and a pion, as a function of the chargino mass and lifetime. At 95% confidence level, charginos with masses below 715 (695) GeV are excluded for a lifetime of 3 (7) ns, as are charginos with lifetimes from 0.5 to 60 ns for a mass of 505 GeV. These are the most stringent limits using a disappearing track signature on this signal model for chargino lifetimes above $\approx$ 0.7 ns.
description: Replaced with the published version. Added the journal reference and the DOI. All the figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/EXO-16-044 (CMS Public Pages)
Asia/Canada Reframed: Perspectives From A Transpacific Film Location
Creators: name: Leung, Helen Hok-Sze
Publisher: name: Canadian Literature
Year: 2016

description: This article examines the limits of approaching Asian Canadian filmmaking in primarily authorial and textual terms. Drawing insights from recent transnational analyses in film studies, the article explores filmmaking practices in the transpacific city of Vancouver and proposes the study of film location as an alternative methodology for Asian Canadian cultural critique.
description: Canadian Literature, No 227 (2015): Asian Canadian Critique Beyond the Nation
Source Code Optimization using Equivalent Mutants
Creators: name: López, Jorge
name: Kushik, Natalia
name: Yevtushenko, Nina
Publisher: name: arXiv
Year: 2018
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: A mutant is a program obtained by syntactically modifying a program's source code; an equivalent mutant is a mutant, which is functionally equivalent to the original program. Mutants are primarily used in \emph{mutation testing}, and when deriving a test suite, obtaining an equivalent mutant is considered to be highly negative, although these equivalent mutants could be used for other purposes. We present an approach that considers equivalent mutants valuable, and utilizes them for source code optimization. Source code optimization enhances a program's source code preserving its behavior. We showcase a procedure to achieve source code optimization based on equivalent mutants and discuss proper mutation operators. Experimental evaluation with Java and C programs demonstrates the applicability of the proposed approach. An algorithmic approach for source code optimization using equivalent mutants is proposed. It is showcased that whenever applicable, the approach can outperform traditional compiler optimizations.
description: Short communication in Elsevier's Information and Software Technology, DOI: 10.1016/j.infsof.2018.06.013
A New Interpretation of the Mass-Temperature Relation and Mass Calibration of Galaxy Clusters Based on the Fundamental Plane
Creators: name: Fujita, Yutaka
name: Umetsu, Keiichi
name: Ettori, Stefano
name: Rasia, Elena
name: Okabe, Nobuhiro
name: Meneghetti, Massimo
Publisher: name: arXiv
Year: 2018
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Observations and numerical simulations have shown that the relation between the mass scaled with the critical density of the universe and the X-ray temperature of galaxy clusters is approximately represented by $M_Δ\propto T_X^{3/2}$ (e.g. $Δ=500$). This relation is often interpreted as evidence that clusters are in virial equilibrium. However, the recently discovered fundamental plane (FP) of clusters indicates that the temperature of clusters primarily depends on a combination of the characteristic mass $M_s$ and radius $r_s$ of the Navarro-Frenk-White profile rather than $M_Δ$. Moreover, the angle of the FP revealed that clusters are not in virial equilibrium because of continuous mass accretion from the surrounding matter. By considering both the FP and the mass dependence of the cluster concentration parameter, we show that this paradox can be solved and the relation $M_Δ\propto T_X^{3/2}$ actually reflects the central structure of clusters. We also find that the intrinsic scatter in the halo concentration-mass relation can largely account for the spread of clusters on the FP. We also show that X-ray data alone form the FP and the angle and the position are consistent with those of the FP constructed from gravitational lensing data. We demonstrate that a possible shift between the two FPs can be used to calibrate cluster masses obtained via X-ray observations.
description: Published on ApJ. Matched to published version
ExploringWeakly Labeled Data Across the Noise-Bias Spectrum
Creators: name: Fisher, Robert W. H.
Publisher: name: Carnegie Mellon University
Year: 2016
Subjects: subject: 170203 Knowledge Representation and Machine Learning
subject: FOS: Psychology

description: As the availability of unstructured data on the web continues to increase, it is becoming increasingly necessary to develop machine learning methods that rely less on human annotated training data. In this thesis, we present methods for learning from weakly labeled data. We present a unifying framework to understand weakly labeled data in terms of bias and noise and identify methods that are well suited to learning from certain types of weak labels. To compensate for the tremendous sizes of weakly labeled datasets, we leverage computationally efficient and statistically consistent spectral methods. Using these methods, we present results from four diverse, real-world applications coupled with a unifying simulation environment. This allows us to make general observations that would not be apparent when examining any one application on its own. These contributions allow us to significantly improve prediction when labeled data is available, and they also make learning tractable when the cost of acquiring annotated data is prohibitively high.
Exploring Spectrum Aggregation Technology: A Study of the Technical, Techno-economic, Policy Implications and the Potential Impact on Spectrum Economics
Creators: name: Alotaibi, Mohammed Awaidh
Publisher: name: Carnegie Mellon University
Year: 2016
Subjects: subject: 160510 Public Policy
subject: FOS: Political science
subject: 99999 Engineering not elsewhere classified
subject: FOS: Other engineering and technologies

description: Spectrum Aggregation (SA) technology has been introduced in cellular standards. Long Term Evolution (LTE)-Advanced is expected to allow aggregation of multiple Component Carriers (CC) to fulfill the high data rate requirement. This thesis, presents an exploratory study of spectrum aggregation technology. First, it analyzes the technology’s technical impact on wireless networks. Second, it estimates the costs and benefits of the SA technology when building out a wireless network. Then, it presents a study case to compare the feasibility of SA technology versus spectrum refarming. Furthermore, the thesis studies SA’s impact on valuation of spectrum by operators. Finally, it discusses the implications of SA on spectrum policies. Results show that LTE systems that use spectrum aggregation over fragmented blocks of spectrum can have better performance compared to Independent Carrier (IC) systems. In addition, aggregating carriers from multiple bands could permit the system to have a better performance in certain circumstances. Moreover, SA technology could have a positive impact on the benefits and costs of nationwide LTE networks. In a case study for using SA over fragmented spectrum in the TV band, the advantages and disadvantages of the use of the technology versus repacking the spectrum physically to create contiguous band are observed and discussed. After empirically studying operators’ willingness to pay for contiguous and low-frequency spectrum, simulation is used to measure the impact of SA on the operators’ valuation for spectrum blocks. Results show that the technology could lead to more linear valuation of spectrum units. Finally, SA impact on spectrum policies is studied and specific recommendations are given to regulators to help exploit fragmentation of spectrum through the technology and encourage fairer access to spectrum by competitors.
ATCA observations of the very young Planetary Nebula SAO 244567
Creators: name: Umana, G.
name: Trigilio, C.
name: Cerrigone, L.
name: Buemi, C. S.
name: Leto, P.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The radio emission from the youngest known Planetary nebula, SAO244567, has been mapped at 1384, 2368, 4800, 8640, 16832 and 18752 MHz by using the Australian Telescope Compact Array (ATCA). These observations constitute the first detailed radio study of this very interesting object, as they allow us to obtain the overall radio morphology of the source and to compute, for the first time, the radio spectrum up to millimetre range. Radio emission is consistent with free-free from a wind-like shell, which is also the region where most of the [OIII] comes from as revealed by HST images. Physical parameters of the radio nebula and of the central star were derived, all consistent with SAO 244567 being a very young Planetary Nebula still embedded in the dusty remnant of the AGB phase. The optically thin radio flux density appear to decrease when compared to data from the literature. Even very appealing, the variability of the radio emission, probably related to the evolution of the central object, needs further investigations.
description: Submitted to MNRAS, 7 pages, 5 figures
Coupling of magnetic order and charge transport in the candidate Dirac semimetal EuCd$_2$As$_2$
Creators: name: Rahn, M. C.
name: Soh, J. -R.
name: Francoual, S.
name: Veiga, L. S. I.
name: Strempfer, J.
name: Mardegan, J.
name: Yan, D. Y.
name: Guo, Y. F.
name: Shi, Y. G.
name: Boothroyd, A. T.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We use resonant elastic x-ray scattering to determine the evolution of magnetic order in EuCd$_2$As$_2$ below $T_\textrm{N}=9.5$\,K, as a function of temperature and applied magnetic field. We find an A-type antiferromagneticstructure with in-plane magnetic moments, and observe dramatic magnetoresistive effects associated with field-induced changes in the magnetic structure and domain populations. Our \textit{ab initio} electronic structure calculations indicate that the Dirac dispersion found in the nonmagnetic Dirac semimetal Cd$_3$As$_2$ is also present in EuCd$_2$As$_2$, but is gapped for $T < T_\textrm{N}$ due to the breaking of $C_3$ symmetry by the magnetic structure.
description: Supplemental information attached to preprint
DSpace 7 - Creating High-Quality Software: Update to Development Practices
Creators: name: Bollini, Andrea
name: Digilio, Giuseppe
name: Donohue, Tim
name: Brady, Terry
Publisher: name: Zenodo
Year: 2019
Subjects: Test-Driven Development (TDD)
Community processes
Integration Test
Rest Contract
UI testing
DSpace

description: The community development processes are a key aspect of any open source software. DSpace has a history of more than 15-years of successful open development collaboration. Over the years technologies, processes, and practices have constantly been updated and improved to facilitate the collaboration and raise the quality of the developed code. DSpace 7 is a milestone in our software history, with the biggest technology changes since the project inception. It also provides the opportunity to enforce and improve development practices, including a Test-Driven Development process and community development sprints. The presentation will provide an overview of the current practices and processes used from DSpace 7 on with regard to the test, development and documentation of the software: concrete examples about how to report a bug and solve a bug, propose and develop a new feature will be presented.
title: Διαδίκτυο των ΣμηΕΑ και εφαρμογές – Προκλήσεις και προοπτικές
title: Internet of Drones and applications – Challenges and prospects
titleType: AlternativeTitle
Creators: name: Ψυχογιός, Ηλίας
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2023
Subjects: subject: Drones
subject: Διαδίκτυο των ΣμηΕΑ
subject: Internet of Drones (IoD)
subject: UAV

description: Το Διαδίκτυο των Drones (Internet of Drones – IoD) έχει κερδίσει τον τελευταίο καιρό την προσοχή της παγκόσμιας τεχνολογικής και επιχειρηματικής κοινότητας λόγω της προσαρμοστικότητας των drones σε ποικίλα σενάρια χρήσης και εφαρμογής τους. Όντως, τα ΣΜηΕΑ (Συστήματα Μη επανδρωμένων Αεροσκαφών – a.k.a. drones) χρησιμοποιούνται ήδη με επιτυχία σε πολλά και διαφορετικά πεδία εφαρμογής όπως η γεωργία ακριβείας, οι αποστολές έρευνας και διάσωσης, οι υπηρεσίες ασφαλείας και επόπτευσης χώρων καθώς και σε κρίσιμες, αναφορικά με το αποτέλεσμά τους, αποστολές. Η χρήση τους σε όλους τους παραπάνω, και αρκετούς ακόμα, τομείς, οφείλεται σε ορισμένα εξαιρετικής σημασίας πλεονεκτήματα, τόσο τεχνικά όσο και πρακτικά: υψηλή κινητικότητα, δυνατότητα πρόσβασης σε σημεία δυσπρόσιτα με άλλες μεθόδους, δυνατότητα παροχής ασύρματης πρόσβασης στο διαδίκτυο σε απομακρυσμένες περιοχές ή σε περιοχές όπου έχουν συμβεί φυσικές καταστροφές και, φυσικά, χαμηλό κόστος παραγωγής, χρήσης και συντήρησης συγκριτικά με όλες τις πιθανές εναλλακτικές, όπου αυτές υπάρχουν. Επιπλέον, η χρήση ΣΜηΕΑ (από εδώ και στο εξής θα αναφέρονται ως drones για μεγαλύτερη ευκολία) βελτιώνει τις παραμέτρους απόδοσης διαφορετικών αρχιτεκτονικών δικτύου όπως αξιοπιστία σύνδεσης, απόδοση, συνδεσιμότητα, επεκτασιμότητα. Ωστόσο, η χρήση δικτύων drones δημιουργεί επιπλέον ζητήματα σχετικά με την εγγενή αναξιοπιστία της ασύρματης επικοινωνίας, τη διάρκεια των μπαταριών και τον υψηλό βαθμό κινητικότητας των drones ο οποίος μπορεί να προκαλέσει συχνές αλλαγές της τοπολογίας του δικτύου. Στην παρούσα εργασία θα παρουσιαστεί η υπάρχουσα κατάσταση αναφορικά με τις μελέτες επάνω στο IoD, τις μελλοντικές προοπτικές του, τα ζητήματα ασφαλείας καθώς και πεδία στα οποία ήδη τα drones χρησιμοποιούνται με μεγάλη επιτυχία και αποτελεσματικότητα.
PROVINCE OF BRITISH COLUMBIA REPORT TO THE HONOURABLE T. D. PATTULLO, MINISTER OF LANDS ON THE QUESTION OF JOINT CONTROL OF WATER SUPPLY TO THE CITIES AND MUNICIPALITIES ON BURRARD INLET E. A. CLEVELAND COMPTROLLER OF WATER RIGHTS, OCTOBER, 1922
Creators: name: British Columbia. Legislative Assembly
Publisher: name: Victoria, BC : Government Printer
Year: 2016

Abstract
Symmetric Bilinear Regression for Signal Subgraph Estimation
Creators: name: Wang, Lu
name: Zhang, Zhengwu
name: Dunson, David
Publisher: name: arXiv
Year: 2018
Subjects: subject: Methodology (stat.ME)
subject: Signal Processing (eess.SP)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: There is increasing interest in learning a set of small outcome-relevant subgraphs in network-predictor regression. The extracted signal subgraphs can greatly improve the interpretation of the association between the network predictor and the response. In brain connectomics, the brain network for an individual corresponds to a set of interconnections among brain regions and there is a strong interest in linking the brain connectome to human cognitive traits. Modern neuroimaging technology allows a very fine segmentation of the brain, producing very large structural brain networks. Therefore, accurate and efficient methods for identifying a set of small predictive subgraphs become crucial, leading to discovery of key interconnected brain regions related to the trait and important insights on the mechanism of variation in human cognitive traits. We propose a symmetric bilinear model with $L_1$ penalty to search for small clique subgraphs that contain useful information about the response. A coordinate descent algorithm is developed to estimate the model where we derive analytical solutions for a sequence of conditional convex optimizations. Application of this method on human connectome and language comprehension data shows interesting discovery of relevant interconnections among several small sets of brain regions and better predictive performance than competitors.
description: 12 pages, double columns, 18 figures
Unified approach to discretization of flow in fractured porous media
Creators: name: Nordbotten, Jan M.
name: Boon, Wietse M.
name: Fumagalli, Alessio
name: Keilegavlen, Eirik
Publisher: name: arXiv
Year: 2018
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: In this paper, we introduce a mortar-based approach to discretizing flow in fractured porous media, which we term the mixed-dimensional flux coupling scheme. Our formulation is agnostic to the discretizations used to discretize the fluid flow equations in the porous medium and in the fractures, and as such it represents a unified approach to integrated fractured geometries into any existing discretization framework. In particular, several existing discretization approaches for fractured porous media can be seen as special instances of the approach proposed herein. We provide an abstract stability theory for our approach, which provides explicit guidance into the grids used to discretize the fractures and the porous medium, as dependent on discretization methods chosen for the respective domains. The theoretical results are sustained by numerical examples, wherein we utilize our framework to simulate flow in 2D and 3D fractured media using control volume methods (both two-point and multi-point flux), Lagrangian finite element methods, mixed finite element methods, and virtual element methods. As expected, regardless of the ambient methods chosen, our approach leads to stable and convergent discretizations for the fractured problems considered, within the limits of the discretization schemes.
Discovery of WASP-174b: Doppler tomography of a near-grazing transit
Creators: name: Temple, L. Y.
name: Hellier, C.
name: Almleaky, Y.
name: Anderson, D. R.
name: Bouchy, F.
name: Brown, D. J. A.
name: Burdanov, A.
name: Cameron, A. Collier
name: Delrez, L.
name: Gillon, M.
name: Hall, R.
name: Jehin, E.
name: Lendl, M.
name: Maxted, P. F. L.
name: Nielsen, L. D.
name: Pepe, F.
name: Pollacco, D.
name: Queloz, D.
name: Ségransan, D.
name: Smalley, B.
name: Sohy, S.
name: Thompson, S.
name: Triaud, A. H. M. J.
name: Turner, O. D.
name: Udry, S.
name: West, R. G.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We report the discovery and tomographic detection of WASP-174b, a planet with a near-grazing transit on a 4.23-d orbit around a $V$ = 11.9, F6V star with [Fe/H] = 0.09 $\pm$ 0.09. The planet is in a moderately misaligned orbit with a sky-projected spin-orbit angle of $λ$ = 31$^{\circ}$ $\pm$ 1$^{\circ}$. This is in agreement with the known tendency for orbits around hotter stars to be misaligned. Owing to the grazing transit the planet's radius is uncertain, with a possible range of 0.8-1.8 R$_{\rm Jup}$. The planet's mass has an upper limit of 1.3 M$_{\rm Jup}$. WASP-174 is the faintest hot-Jupiter system so far confirmed by tomographic means.
description: 8 pages, 6 figures, accepted by MNRAS
Building NED: National edeposit for Australia
Creators: name: Lemon, Barbara
Publisher: name: Zenodo
Year: 2019
Subjects: Legal deposit
Australia
publishers
federated repository
digital preservation

description: Australia is a big country. So big that our rail tracks were built to different measurements in different states. Similarly, our state and territory libraries have operated with separate legislation to collect materials published in their jurisdictions, with the National Library in Canberra responsible for collecting copies of all Australian publications. That made some sense when publications were in print form. In 2016, however, Australia's legal deposit provisions were finally extended to cover electronic materials. Nine state and territory libraries agreed to a world-first collaboration to build one system that could provide for deposit, management, storage, preservation, discovery and delivery of published electronic material nationwide. A system that could cater to commercial, non-profit, academic, and community-based publishers alike – allowing them to deposit once or in bulk, nominate access conditions, have copies automatically transferred to relevant libraries, and track usage statistics. A system capable of capturing and preserving the digital documentary heritage of Australia for the future, while providing an excellent user experience today for publishers (easy deposit mechanism), libraries (more efficient workflows), and the public (broader access to Australian publications). This presentation shares our approach to the significant challenges of satisfying nine sets of technical requirements and legislation, balancing open access principles and copyright law with content security and protection of commercial viability, in order to launch NED as an open repository for Australia in May 2019.
Fitting the radial acceleration relation to individual SPARC galaxies
Creators: name: Li, Pengfei
name: Lelli, Federico
name: McGaugh, Stacy S.
name: Schombert, James M.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Galaxies follow a tight radial acceleration relation (RAR): the acceleration observed at every radius correlates with that expected from the distribution of baryons. We use the Markov Chain Monte Carlo method to fit the mean RAR to 175 individual galaxies in the SPARC database, marginalizing over stellar mass-to-light ratio ($Υ_{\star}$), galaxy distance, and disk inclination. Acceptable fits with astrophysically reasonable parameters are found for the vast majority of galaxies. The residuals around these fits have an rms scatter of only 0.057 dex ($\sim$13$\%$). This is in agreement with the predictions of modified Newtonian dynamics (MOND). We further consider a generalized version of the RAR that, unlike MOND, permits galaxy-to-galaxy variation in the critical acceleration scale. The fits are not improved with this additional freedom: there is no credible indication of variation in the critical acceleration scale. The data are consistent with the action of a single effective force law. The apparent universality of the acceleration scale and the small residual scatter are key to understanding galaxies.
description: 12 pages, 7 figures, 2 tables. Accepted for publication in A&A. The same as the first version with typos corrected. A set of 175 figures is available at http://astroweb.cwru.edu/SPARC/
A Hierarchical Array of Integrable Models
Creators: name: Freund, Peter G. O.
name: Zabrodin, Anton V.
Publisher: name: arXiv
Year: 1992
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Motivated by Harish-Chandra theory, we construct, starting from a simple CDD\--pole $S$\--matrix, a hierarchy of new $S$\--matrices involving ever ``higher'' (in the sense of Barnes) gamma functions.These new $S$\--matrices correspond to scattering of excitations in ever more complex integrable models.From each of these models, new ones are obtained either by ``$q$\--deformation'', or by considering the Selberg-type Euler products of which they represent the ``infinite place''. A hierarchic array of integrable models is thus obtained. A remarkable diagonal link in this array is established.Though many entries in this array correspond to familiar integrable models, the array also leads to new models. In setting up this array we were led to new results on the $q$\--gamma function and on the $q$\--deformed Bloch\--Wigner function.
description: 18 pages, EFI-92-29
Generalized Swanson models and their solutions
Creators: name: Sinha, A.
name: Roy, P.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We analyze a class of non-Hermitian quadratic Hamiltonians, which are of the form $ H = {\cal{A}}^{\dagger} {\cal{A}} + α{\cal{A}} ^2 + β{\cal{A}}^{\dagger 2} $, where $ α, β$ are real constants, with $ α\neq β$, and ${\cal{A}}^{\dagger}$ and ${\cal{A}}$ are generalized creation and annihilation operators. Thus these Hamiltonians may be classified as generalized Swanson models. It is shown that the eigenenergies are real for a certain range of values of the parameters. A similarity transformation $ρ$, mapping the non-Hermitian Hamiltonian $H$ to a Hermitian one $h$, is also obtained. It is shown that $H$ and $h$ share identical energies. As explicit examples, the solutions of a couple of models based on the trigonometric Rosen-Morse I and the hyperbolic Rosen-Morse II type potentials are obtained. We also study the case when the non-Hermitian Hamiltonian is ${\cal{PT}}$ symmetric.
description: 17 pages
Statistical tracing of magnetic fields: comparing and improving the techniques
Creators: name: Yuen, Ka Ho
name: Chen, Junda
name: Hu, Yue
name: Ho, Ka Wai
name: Lazarian, A.
name: Lazarian, Victor
name: Yang, Bo
name: Burkhart, Blakesley
name: Correia, Caio
name: Cho, Jungyeon
name: Canto, Bruno
name: De Medeiros, J. R.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Magnetohydrodynamic(MHD) turbulence displays velocity anisotropies which reflect the direction of the magnetic field. This anisotropy has led to the development of a number of statistical techniques for studying magnetic fields in the interstellar medium. In this paper, we review and compare three techniques that use radio position-position-velocity data for determining magnetic field strength and morphology : the correlation function anisotropy (CFA), Principal Component Analysis of Anisotropies (PCAA), and the more recent Velocity Gradient Technique (VGT). We compare these three techniques and suggest improvements to the CFA and PCAA techniques to increase their accuracy and versatility. In particular, we suggest and successfully implement a much faster way of calculating non-periodic correlation functions for the CFA. We discuss possible improvements to the current implementation of the PCAA. We show the advantages of the VGT in terms of magnetic field tracing and stress the complementary nature with the other two techniques.
description: 18 pages, 18 figures, 3 appendices, accepted by ApJ for publication
Spin and charge pumping by steady or pulse current-driven magnetic domain wall: A self-consistent multiscale time-dependent-quantum/time-dependent-classical approach
Creators: name: Petrovic, Marko
name: Popescu, Bogdan S.
name: Bajpai, Utkarsh
name: Plechac, Petr
name: Nikolic, Branislav K.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We introduce a multiscale framework which combines time-dependent nonequilibrium Green function (TD-NEGF) algorithms, scaling linearly in the number of time steps and describing quantum-mechanically conduction electrons in the presence of time-dependent fields of arbitrary strength or frequency, with classical time evolution of localized magnetic moments described by the Landau-Lifshitz-Gilbert (LLG) equation. The TD-NEGF+LLG framework can be applied to a variety of problems where current-driven spin torque induces dynamics of magnetic moments as the key resource for next generation spintronics. Using magnetic domain wall (DW) as an example, we predict that its motion will pump time-dependent spin and charge currents (on the top of unpolarized DC charge current injected through normal metal leads to drive the DW motion). The conversion of AC components of spin current, whose amplitude increases (decreases) as the DW approaches (distances from) the normal metal lead, into AC voltage via the inverse spin Hall effect offers a tool to precisely track the DW position along magnetic nanowire. We also quantify the DW transient inertial displacement due to its acceleration and deceleration by pulse current and the entailed spin and charge pumping. Finally, TD-NEGF+LLG as a nonperturbative (i.e., numerically exact) framework allows us to establish the limits of validity of the so-called spin-motive force (SMF) theory for pumped charge current by time-dependent magnetic textures---the perturbative analytical formula of SMF theory becomes inapplicable for large frequencies (but unrealistic in magnetic system) and, more importantly, for increasing noncollinearity when the angles between neighboring magnetic moments exceed $\simeq 10^\circ$.
description: 11 pages, 8 figures, PDFLaTeX; three additional movies of domain wall motion driven by injecting DC or pulse charge current are available from https://wiki.physics.udel.edu/qttg/Publications
Qualitative behavior of cosmological models combining various matter fields
Creators: name: Shah, Parth
name: Samanta, Gauranga C.
name: Capozziello, Salvatore
Publisher: name: arXiv
Year: 2018
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The late time accelerated expansion of the universe can be realized using scalar fields with given self-interacting potentials. Here we consider a straightforward approach where a three cosmic fluid mixture is assumed. The fluids are standard matter perfect fluid, dark matter, and a scalar field with the role of dark energy. A dynamical system analysis is developed in this context. A central role is played by the equation of state $ω_{eff}$ which determines the acceleration phase of the models. Determining the domination of a particular fluid at certain stages of the universe history by stability analysis allows, in principle, to establish the succession of the various cosmological eras.
description: 18 pages, 7 figures, accepted in IJMPA
Exploring and Bridging Group Divides in Climate Communications
Creators: name: Babcock, Matthew
Publisher: name: Carnegie Mellon University
Year: 2017
Subjects: subject: 160510 Public Policy
subject: FOS: Political science
subject: 99999 Engineering not elsewhere classified
subject: FOS: Other engineering and technologies

description: At the same time that additional coordination and cooperation between involved stakeholder groups is required more than ever to respond to changing environmental and socio-economic conditions, there has been an increasing trend of polarization across several important social divides (scientists/local actors, urban/rural, and political partisanship). Boundary organizations and boundary chains have been promoted as ways to help mitigate the problematic effects these divisions have on the successful communication of climate adaptation information in the water management sector. In this dissertation, I present three studies that were conducted in two regions to further explore stakeholder groups and the boundary chains that connect them. Both areas (Guanacaste, Costa Rica and Montana, USA) are historically agricultural regions experiencing ongoing environmental and socio-economic shifts. A mental models approach involving the use of interviews and surveys was used in each study area. The first two studies were conducted in Guanacaste and focused on comparing stakeholder group perceptions of their water system and hydro-climate information and on the differences in trust in forecast sources and its impact on forecast use. The results of these studies suggest that there is a distinction between the perceptions of larger stakeholder groups (e.g. government agencies or large farmers) and smaller groups (e.g. local water committees), and that this division suggests a need for boundary-type translation work. The third study was conducted in Montana with a focus on what communication strategies are used by, and what prompts engagement with, a boundary chain connecting rural agriculturalists to urban scientists. The results show that members of the network generally agree that for successful communication it is important both to not engage in ways viewed as attacks on agriculture and to make attempts to understand and respect local agricultural contexts. While there is some tension in the network, overall “buy-in” to the goal of bridging divides appears to be a common reason for engagement. In addition, organizations engage with the boundary chain for both the opportunity to connect to others and because of the need for translation between the concerns and logistics of different groups.
Fundamental studies of ethanol oxidation reaction in direct ethanol fuel cells using density functional theory (DFT) calculations
Creators: name: Chen, Yafeng
Publisher: name: Loughborough University
Year: 2021
Subjects: subject: 90499 Chemical Engineering not elsewhere classified
subject: FOS: Chemical engineering

description: In this thesis, first-principles calculations within the density functional theory (DFT) framework were utilized to investigate heterogeneous catalytic reactions in direct ethanol fuel cell. The ethanol electrooxidation on Pd and binary Pd systems are studied, concerning mainly on the activity and selectivity, respectively. Meanwhile, due to the high cost of Pt and Pd and the CO poisoning effect, we aim to reduce the loading of Pd and Pt in catalysts. In this thesis, three ways of improving electrocatalytic performance of catalysts have been studied: (i) using some additives to promote the catalyst; (ii) tuning the catalytic surface thickness to get higher active surface area; (iii) controlling the structure or shape of particles to form some extremely active sites. From our theoretical studies, some basic principle has been obtained for rational design of high performance ethanol oxidation reaction catalysts: (i) active surface sites for C–C bond breaking; (ii) a suitable surface composition to increase selectivity for CO2 formation; (iii) the ability to facilitate the adsorption and activation of water (OH*) for the initiation of reaction. [Continues.]