cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Inventory effects on the price dynamics of VSTOXX futures quantified via machine learning
Creators: name: Guterding, Daniel
Publisher: name: arXiv
Year: 2020
Subjects: subject: Trading and Market Microstructure (q-fin.TR)
subject: Pricing of Securities (q-fin.PR)
subject: FOS: Economics and business

description: The VSTOXX index tracks the expected 30-day volatility of the EURO STOXX 50 equity index. Futures on the VSTOXX index can, therefore, be used to hedge against economic uncertainty. We investigate the effect of trader inventory on the price of VSTOXX futures through a combination of stochastic processes and machine learning methods. We formulate a simple and efficient pricing methodology for VSTOXX futures, which assumes a Heston-type stochastic process for the underlying EURO STOXX 50 market. Under these dynamics, approximate analytical formulas for the implied volatility smile and the VSTOXX index have recently been derived. We use the EURO STOXX 50 option implied volatilities and the VSTOXX index value to estimate the parameters of this Heston model. Following the calibration, we calculate theoretical VSTOXX future prices and compare them to the actual market prices. While theoretical and market prices are usually in line, we also observe time periods, during which the market price does not agree with our Heston model. We collect a variety of market features that could potentially explain the price deviations and calibrate two machine learning models to the price difference: a regularized linear model and a random forest. We find that both models indicate a strong influence of accumulated trader positions on the VSTOXX futures price.
Food procurement guideline
Creators: name: Kang, Min Ji
name: Rudek, Amber
name: Tin, April
name: Wong, Claire
Publisher: name: The University of British Columbia
Year: 2014

description: The UBC food system project is a research project that aims to improve the sustainability of UBC food system. Our group’s scenario focuses on developing a food procurement guideline for AMSFBD and UBC food services. Our project focuses on developing a guideline on fresh produce for these two departments. We propose to consider alternative food distributors (rather than Central foods) that can reduce our ecological footprint. Past AGSC 450 projects guided our group to a new direction but along the lines of developing a food procurement guideline. Our group based our focus on one of Delisa Lewis’s Liaison report’s recommendation: “to pursue a direct relationship with Fraserland Organics”. Within our research, findings have shown that there are other food distributors within BC that have better sustainable practices by choosing more local suppliers. Our investigation has shown that ProOrganics and Discovery organics are two food distributors that are more sustainable and collaborates with many local farms. They currently deliver to UBC Sprouts 1-2 times a week. We hope that future LFS 450 students will follow up on our project and strengthen the relationship between UBC and local farms and suppliers by following our food procurement guidelines. Disclaimer: “UBC SEEDS provides students with the opportunity to share the findings of their studies, as well as their opinions, conclusions and recommendations with the UBC community. The reader should bear in mind that this is a student project/report and is not an official document of UBC. Furthermore readers should bear in mind that these reports may not reflect the current status of activities at UBC. We urge you to contact the research persons mentioned in a report or the SEEDS Coordinator about the current status of the subject matter of a project/report.”
Perturbative deflection angle for signal with finite distance and general velocities
Creators: name: Huang, Ke
name: Jia, Junji
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We propose a perturbative method to compute the deflection angle of both null and massive particles for source and detector at finite distance. This method applies universally to the motion of particles with general velocity in the equatorial plane of stationary axisymmetric spacetimes or static spherical symmetric spacetimes that are asymptotically flat. The resultant deflection angle automatically arranges into a quasi-inverse series form of the impact parameter, with coefficients depending on the metric functions, the signal velocity and the source and detector locations through the apparent angles. In the large impact parameter limit, the series coefficients are reduced to rational functions of sine/cosine functions of the zero order apparent angle.
description: 12 pages, 1 figure; structure adjusted
Agrilus neuquensis Kerremans 1903
Creators: name: Curletti, Gianfranco
name: Migliore, Letizia
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Buprestidae
Agrilus
Agrilus neuquensis

description: Agrilus neuquensis Kerremans, 1903
 Agrilus neuquensis Kerremans, 1903: 269.
Permuta com Museu de La Plata. 2 exs., Cótipos.
description: Published as part of Curletti, Gianfranco & Migliore, Letizia, 2014, O gênero Agrilus Curtis, 1829 nas coleções do Museu de Zoologia da Universidade de São Paulo (Coleoptera: Buprestidae), pp. 81-106 in Papéis Avulsos de Zoologia (São Paulo) (São Paulo) 54 (8) on page 103, DOI: 10.1590/0031-1049.2014.54.08, http://zenodo.org/record/4656297
Hydrodynamics of polymers in an active bath
Creators: name: Martin-Gomez, Aitor
name: Eisenstecken, Thomas
name: Gompper, Gerhard
name: Winkler, Roland G.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The conformational and dynamical properties of active polymers in solution are determined by the nature of the activity, and the behavior of polymers with self-propelled, active Brownian particle-type monomers differs qualitatively from that of polymers with monomers driven externally by colored noise forces. We present simulation and theoretical results for polymers in solution in the presence of external active noise. In simulations, a semiflexible bead-spring chain is considered, in analytical calculations, a continuous linear wormlike chain. Activity is taken into account by independent monomer/site velocities, with orientations changing in a diffusive manner. In simulations, hydrodynamic interactions (HI) are taken into account by the Rotne-Prager-Yamakawa tensor, or by an implementation of the active polymer in the multiparticle collision dynamics approach for fluids. To arrive at an analytical solution, the preaveraged Oseen tensor is employed. The active process implies a dependence of the stationary-state properties on HI via polymer relaxation times. With increasing activity, HI lead to an enhanced swelling of flexible polymers, and the conformational properties differ substantially from those of polymers with self-propelled monomers in presence of HI or free-draining polymers. The polymer mean square displacement is enhanced by HI. Over a wide range of time scales, hydrodynamics leads to a subdiffusive regime of the site mean square displacement for flexible active polymers, with an exponent of (5/7), larger than that of the Rouse (1/2) and Zimm (2/3) models of passive polymers.
description: 16 pages, 11 figures
Geography, Transparency and Institutions
Creators: name: Mayshar, Joram
name: Moav, Omer
name: Neeman, Zvika
name: Mayshar, Joram
name: Moav, Omer
name: Neeman, Zvika
Publisher: name: Unknown
Year: 2016
Subjects: subject: Financial Economics
subject: Geography
subject: Transparency
subject: Institutions
subject: Land Tenure
subject: State Capacity
subject: State Concentration

description: We propose a theory by which geographic attributes explain cross-regional institutional di§erences in: (1) the scale of the state, (2) the distribution of power within state hierarchy, and (3) property rights over land. The mechanism that underlies our theory concerns the stateís extractive capacity. In particular, we argue that the ability to appropriate revenue from the farming sector is a§ected by the transparency of farming which, in turn, is a§ected by geography and technology. We apply the theory to explain the di§erences between the institutions of Ancient Egypt, Southern Mesopotamia and Northern Mesopotamia.
Intervention - Being British
Creators: name: Aitchison, Kenneth
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 500321
subject: Social and political philosophy
classificationCode: 430205
subject: Heritage and cultural conservation

description: ICON News 12, 52.Gordon Brown likes to talk about “Britishness” and its importance in contemporary society. His interest in Britishness is very definitely not founded on chauvinistic beliefs that British people are in some way privileged and unique, or that we are better than others, but in that it can support the one identity that everyone living in or connected to this country shares.The important thing about Britishness is that it is not a national identity, it is a civic one. However we choose to define and identify ourselves individually, whether on the basis of where we feel we and our people are from – say, whether we think of ourselves as being Scottish, or as being Fifers – or on the basis of what we think and feel – as socialists, historians, or even as Raith Rovers supporters – the one thing we all have in common is Britain.
title: FACE MASKS AND SPEECH PERCEPTION
title: EMOTIONS AND INTELLIGIBILITY PERCEIVED BY MONOLINGUAL AND BILINGUAL SPEAKERS
titleType: Subtitle
Creators: name: Chulde, Monica
Publisher: name: University of Kentucky Libraries
Year: 2022
Subjects: subject: FOS: Languages and literature
valueUri: http://www.oecd.org/science/inno/38235147.pdf

description: Speech perception in unfavorable conditions reduces the intelligibility of the message. The use of face masks may be one factor that degrades the comprehension of target words in transcription tasks and the recognition of emotional prosodies. Different researchers have proposed the influence of visual stimuli in the comprehension of the linguistic message (e.g., Tuomainen et al., 2005; Schwartz et al., 2004; Llamas et al., 2008; McGowan, 2015). This study reports the results of an experiment that tests how intelligibility and emotional prosody are affected by surgical masks. The online experiment has been applied to two groups of speakers from the University of Kentucky. The first group consisted of 42 students from the Latin Students Association (LSA) with Spanish-English backgrounds who were subdivided in three groups according to their language’s history, monolinguals (L1), early bilinguals (L1-2), and late bilinguals (L2). The second group consisted of 10 monolingual English speakers from the Linguistics department. Both groups performed a transcription task plus an emotional prosody rating from 60 videos of a native English speaker in two conditions: MASK and NO MASK. Participants in both groups obtained more accurate results in the NO MASK perception tasks.
description: © 2022 Monica Chulde
Angular momentum distribution of hot gas and implications for disk galaxy formation
Creators: name: Chen, D. N.
name: Jing, Y. P.
name: Yoshikawa, Kohji
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study the angular momentum profiles both for dark matter and for gas within virialized halos, using a statistical sample of halos drawn from cosmological hydrodynamics simulations. Three simulations have been analyzed, one is the ``non-radiative'' simulation, and the other two have radiative cooling. We find that the gas component on average has a larger spin and contains a smaller fraction of mass with negative angular momentum than its dark matter counterpart in the non-radiative model. As to the cooling models, the gas component shares approximately the same spin parameter as its dark matter counterpart, but the hot gas has a higher spin and is more aligned in angular momentum than dark matter, while the opposite holds for the cold gas. After the mass of negative angular momentum is excluded, the angular momentum profile of the hot gas component approximately follows the universal function originally proposed by Bullock et al. for dark matter, though the shape parameter $μ$ is much larger for hot gas and is comfortably in the range required by observations of disk galaxies. Since disk formation is related to the distribution of hot gas that will cool, our study may explain the fact that the disk component of observed galaxies contains a smaller fraction of low angular momentum material than dark matter in halos.
description: 30 pages, 12 figures, 4 tables, accepted for publication in ApJ
The ALPINE-ALMA [CII] Survey: Size of Individual Star-Forming Galaxies at z=4-6 and their Extended Halo Structure
Creators: name: Fujimoto, S.
name: Silverman, J. D.
name: Bethermin, Matthieu
name: Ginolfi, M.
name: Jones, G. C.
name: Fèvre, O. Le
name: Dessauges-Zavadsky, M.
name: Rujopakarn, W.
name: Faisst, A. L.
name: Fudamoto, Y.
name: Cassata, P.
name: Morselli, L.
name: Maiolino, R.
name: Schaerer, D.
name: Capak, P.
name: Yan, L.
name: Vallini, L.
name: Toft, S.
name: Loiacono, F.
name: Zamorani, G.
name: Talia, M.
name: Narayanan, D.
name: Hathi, N. P.
name: Lemaux, B. C.
name: Boquien, Médéric
name: Amorin, R.
name: Ibar, E.
name: Koekemoer, A. M.
name: Méndez-Hernández, H.
name: Bardelli, Sandro
name: Vergani, D.
name: Zucca, E.
name: Romano, M.
name: Cimatti, A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present the physical extent of [CII] 158um line-emitting gas from 46 star-forming galaxies at z=4-6 from the ALMA Large Program to INvestigate CII at Early Times (ALPINE). Using exponential profile fits, we measure the effective radius of the [CII] line (r_e,[CII]) for individual galaxies and compare them with the rest-frame ultra-violet (UV) continuum (r_e,UV) from Hubble Space Telescope images. The effective radius r_e,[CII] exceeds r_e,UV by factors of ~2-3 and the ratio of r_e,[CII]/r_e,UV increases as a function of M_star. We do not find strong evidence that [CII] line, the rest-frame UV, and FIR continuum are always displaced over ~ 1-kpc scale from each other. We identify 30% of isolated ALPINE sources as having an extended [CII] component over 10-kpc scales detected at 4.1$σ$-10.9$σ$ beyond the size of rest-frame UV and far-infrared (FIR) continuum. One object has tentative rotating features up to ~10-kpc, where the 3D model fit shows the rotating [CII]-gas disk spread over 4 times larger than the rest-frame UV-emitting region. Galaxies with the extended [CII] line structure have high star-formation rate (SFR), stellar mass (M_star), low Lya equivalent-width, and more blue-shifted (red-shifted) rest-frame UV metal absorption (Lya line), as compared to galaxies without such extended [CII] structures. Although we cannot rule out the possibility that a selection bias towards luminous objects may be responsible for such trends, the star-formation driven outflow also explains all these trends. Deeper observations are essential to test whether the extended [CII] line structures are ubiquitous to high-z star-forming galaxies.
description: 21 pages, 11 figures, ApJ in press
Second quantization and the L^p-spectrum of nonsymmetric Ornstein-Uhlenbeck operators
Creators: name: van Neerven, Jan
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mathematical Physics (math-ph)
subject: Functional Analysis (math.FA)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 35R15, 81S10 (35P05, 47D03, 47D07, 60H15) 60H15}

description: The spectra of the second quantization and the symmetric second quantization of a strict Hilbert space contraction are computed explicitly and shown to coincide. As an application, we compute the spectrum of the nonsymmetric Ornstein-Uhlenbeck operator $L$ associated with the infinite-dimensional Langevin equation $$ dU(t) = AU(t)dt + dW(t), $$ where $A$ is the generator of a strongly continuous semigroup on a Banach space $E$ and $W$ is a cylindrical Wiener process in $E$. In the case of a finite-dimensional space $E$ we recover the recent Metafune-Pallara-Priola formula for the spectrum of $L$.
description: 20 pages
title: Becoming and Being 'People Like Us': A Study of Students Who Experience Difficulties With Literacy in National Curriculum History at Key Stage 3
Creators: name: Davies, Sandra Daredri
Publisher: name: The Open University
Year: 2008

description: My study considers a group of students who experience difficulties with literacy and investigates the factors, at the levels of the social order, the arena of school and the settings within it, which either fostered or hindered their participation and therefore their learning in the history classroom at Key Stage 3. My research is set within a sociocultural framework which emphasises the importance of collaborative learning and considers that factors, not only within settings in the classroom but also those outside, impact on participation and contribute to the construction of identity. A sociocultural framework invites certain research tools such as case studies and comparative methods. I undertook a study at two different levels, that of the Humanities Faculty but also of each student. This took the form of a longitudinal study over a two year period when the students were in mixed ability groupings in Year 8 and setted groupings in Year 9. I undertook the study in this way to investigate not only the moment by moment interpersonal action, but also the development of identity over time. Methods used on the research in both years included questionnaires, classroom observation and semi-structured interviews using a projective technique ‘Talking Stones’ to provide rich data on interpersonal interaction and intrapersonal reflections on this. The study indicated that factors which affect participation and learning are multilayered and difficult to separate. These factors include financial factors at government level outside the arena of school, the demands of the curriculum as imposed from outside and how it is interpreted within the arena of school, pedagogy and practice of teachers, the attitude of peers in the classroom and wider arena of school and the sources of a subject (in this case History) to which the students are exposed outside school.
Stability and electronic structure of the $(1\times 1)$ SrTiO$_3$(110) polar surfaces by first principles calculations
Creators: name: Bottin, Francois
name: Noguera, Claudine
name: Finocchi, Fabio
Publisher: name: arXiv
Year: 2003
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The electronic and atomic structure of several $(1\times 1)$ terminations of the (110) polar orientation of SrTiO$_3$ surface are systematically studied by first-principles calculations. The electronic structure of the two stoichiometric SrTiO- and O$_2$-terminations are characterized by marked differences with respect to the bulk, as a consequence of the polarity compensation. In the former, the Fermi level is located at the bottom of the conduction band, while in the latter the formation of a peroxo bond between the two surface oxygens results in a small-gap insulating surface with states in the gap of the bulk projected band structure. We also consider three non stoichiometric terminations with TiO, Sr and O compositions, respectively, in the outermost atomic layer, which automatically allows the surface to be free from any macroscopic polarization. They are all insulating. The cleavage and surface energies of the five terminations are computed and compared, taking into account the influence of the chemical environment as a function of the relative richness in O and Sr. From our calculations it appears that some (110) faces can even compete with the TiO$_2$ and SrO terminations of the (100) cleavage surface: in particular, the (110)-TiO termination is stable in Sr-poor conditions, the (110)-Sr one in simultaneously O- and Sr-rich environments. The available experimental data are compared to the outcomes of our calculations and discussed.
description: accepted for publication in Phys. Rev. B
Differential coverage: automating coverage analysis
Creators: name: Cox, Henry
Publisher: name: Zenodo
Year: 2021

description: While it is easy to automate coverage data collection, it is a time consuming/difficult/expensive manual process to analyze the data so that it can be acted upon. The goal of the approaches discussed in here is to reduce the cost and barrier to entry of using coverage data analysis in large-scale projects by categorizing and prioritizing coverage changes to avoid the need for manual review at every release or on every build. Differential coverage and date binning are methods of combining coverage data and project/file history to determine if goals have been met and to identify areas of unexercised code which should be reviewed. These methods can be applied to any coverage metric which can be associated with a location – statement, function, expression, toggle, etc. – and to any language, including both software (C++, Python, etc.) and hardware description languages (SystemVerilog, VHDL). The approach is realized in diffcov, a recently released open-source tool. Keywords—code coverage, automation, software development, continuous integration
Quiver CFT at strong coupling
Creators: name: Zarembo, K.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The circular Wilson loop in the two-node quiver CFT is computed at large-N and strong 't Hooft coupling by solving the localization matrix model.
description: 30 pages, 6 figures; v2: misprints corrected
Coherent dynamics and mapping of excitons in single-layer MoSe$_2$ and WSe$_2$ at the homogeneous limit
Creators: name: Boule, Caroline
name: Vaclavkova, Diana
name: Bartos, Miroslav
name: Nogajewski, Karol
name: Zdrazil, Lukas
name: Taniguchi, Takashi
name: Watanabe, Kenji
name: Potemski, Marek
name: Kasprzak, Jacek
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We perform coherent nonlinear spectroscopy of excitons in single-layers of MoSe$_2$ and WSe$_2$ encapsulated between thin films of hexagonal boron nitride. Employing four-wave mixing microscopy we identify virtually disorder free areas, generating exciton optical response at the homogeneous limit. Focussing on such areas, we measure exciton homogeneous broadening as a function of environmental factors, namely temperature and exciton density. Exploiting FWM imaging, we find that at such locations, nonlinear absorption of the exciton excited states and their coherent couplings can be observed. Using the WSe$_2$ heterostructure, we infer coherence and density dynamics of the exciton 2S state. Owing to its increased radiative lifetime, at low temperatures, the dephasing of the 2S state is longer than of the 1S transition. While scanning various heterostructures across tens of micrometers, we conclude that the disorder, principally induced by strain variations, remain to be present creating spatially varying inhomogeneous broadening.
GEOLOGICAL AND SOIL CHARACTERISTICS AS DETERMINANTS OF LANDSLIDE SUSCEPTIBILITY IN ANAMBRA STATE, NIGERIA
Creators: name: Adaeze, Nkemdilim Udeh
Publisher: name: NOLAND JOURNALS
Year: 2024
Subjects: Dystric Nitosols, Geological formations, Gleysols, Soil erodibility

description: This study investigates soil erodibility in three Local Government Areas (LGAs) within Anambra State, Nigeria—Ekwusigo, Ihiala, and Ogbaru—situated in the lower Niger River Basin prone to frequent and severe flooding. The aim is to assess geological and soil characteristics influencing landslide susceptibility. The methodology involves identifying and characterizing soil types, calculating the Soil Erodibility Factor (K) using empirical formulas, and mapping erosion susceptibility. Data from the Soil Map of the World (version 3.6) were used, corrected for accuracy, and integrated into geographic projections. Analysis included William’s equation to calculate K factors based on soil properties such as sand, silt, clay, and organic matter content. Results highlight diverse geological formations: Ameki Group (34.24%), Benin Formation (0.26%), Ogwashi-Asaba Formation (1.59%), River Niger (1.86%), Sands, Gravels, and Clay (42.36%), and Sombreiro Warri Deltaic Plain (19.69%). Soil types identified include Dystric Nitosols (K = 0.0178) covering 449.11 km² and Gleysols (K = 0.0189) covering 283.95 km², each exhibiting unique erosion susceptibilities. Gleysols are characterized by poor drainage and high-water retention, posing higher landslide risks during heavy rainfall compared to Dystric Nitosols. The correlation between K factors and hydrological data, showing Gleysols as more vulnerable to landslides in wet conditions. Recommendations include targeted erosion control measures like terracing, vegetative buffers, and improved drainage systems for high-risk zones. Maintaining vegetative cover and implementing sustainable land management practices are crucial for mitigating erosion and landslide risks. This study provides a detailed understanding of geological and soil factors affecting landslide susceptibility in Anambra State. It underscores the need for tailored soil conservation and landslide mitigation strategies aligned with specific geological formations and soil types, contributing to sustainable land management practices in flood-prone regions
Unloading and Receiving Produce in Retail Food Stores
Creators: name: Shaffer, Paul
name: Anderson, Dale
name: Shaffer, Paul
name: Anderson, Dale
Publisher: name: Unknown
Year: 1956
Subjects: Labor and Human Capital
Productivity Analysis
Research Methods/ Statistical Methods

description: Excerpts from the report Introduction: The produce department is the third largest department in most supermarkets, ranking in volume of sales after the grocery and meat departments. In most supermarkets produce accounts for 10 to 12 percent of the store's sales volume and because of its perishability, the margin to handle it is one of the highest in the store. The unloading and receiving of produce is the first handling operation performed at the retail level. The cost of this function is less than 5 percent of the total cost of handling produce in the retail store. Methods of unloading and receiving produce at retail food stores range from carrying the produce into the store by hand to a completely palletized operation where individual cases are not handled. Since no 2 stores are exactly alike and all firms and managers have their own views as to the methods to use, there is little standardization of procedures. Studies were made in 15 supermarkets of 3 retail food chains to determine methods and productivity of their present unloading and receiving operation. The unloading and receiving function included all operations involved in moving produce from the truck trailer to final storage in the store. A number of improvements were made as a result of the studies. These improved practices were adopted in several stores and employees trained in their use. Time studies were then made to evaluate improvements.
Reply to Comment on "Topological Oscillations of the Magnetoconductance in Disordered GaAs Layers"
Creators: name: Murzin, S. S.
name: Jansen, A. G. M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Reply to A. M. M. Pruisken and I. S. Burmistrov: cond-mat/0504763
description: 1 page
A Stable and Reliable Short-Path Routing Scheme for Efficient Acoustic Wireless Sensor Networks (AWSNs)
Creators: name: Qadir, Junaid
Publisher: name: figshare
Year: 2020
Subjects: subject: 100510 Wireless Communications
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Owning to the vital resources in a harsh and unforeseeable aqueous environment, the network stability and reliability in underwater acoustic wireless sensor networks (UAWSNs) have paramount significance. Stability guarantees the consistent performance of the network node’s energy consumption, avoids data loss, packets reception time and network lifetime. The reliability of packet ensures the selection of favorable channel and avoid adverse channel effects, and the vital information is easily obtained from
data packets. This paper introduces two new routing schemes for UAWSNs; stable and reliable short-path
routing (RSPR) scheme, and cooperative reliable short-path routing (CoRSPR). In RSPR routing, the destination node is selected by considering the weighting function parameters of the highest residual energy, highest SNR, lowest euclidean distance, and least number of neighbor nodes. The scheme reduces the energy consumption due to less number of nodes contribution in the packet advancement process. The RSPR protocol is a non-cooperative technique, where the packets are delivered using a single-path link, which may not be consistently reliable. To cope with this issue, the CoRSPR protocol is proposed, which takes cooperative routing into account, for stable and reliable data delivery. In cooperative routing, the reception of more than one copy of the data packet is involved by the destination node. This reduces the unfavorable channel effects during data delivery. The simulation results show that the proposed schemes achieve better performance in terms of dead nodes, energy left in the battery, packet acceptance ratio, successful receiving of packets at the sink and E-2-E delay.
Agrilus dilaticornis Kerremans 1897
Creators: name: Curletti, Gianfranco
name: Migliore, Letizia
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Buprestidae
Agrilus
Agrilus dilaticornis

description: Agrilus dilaticornis Kerremans, 1897
 Agrilus dilaticornis Kerremans, 1897: 86.
 Material examinado: BRASIL, Santa Catarina, Nova Teutônia, 1 ex., XII.1936, B. Pohl leg.
description: Published as part of Curletti, Gianfranco & Migliore, Letizia, 2014, O gênero Agrilus Curtis, 1829 nas coleções do Museu de Zoologia da Universidade de São Paulo (Coleoptera: Buprestidae), pp. 81-106 in Papéis Avulsos de Zoologia (São Paulo) (São Paulo) 54 (8) on page 102, DOI: 10.1590/0031-1049.2014.54.08, http://zenodo.org/record/4656297
$Δ(27)$ framework for cobimaximal neutrino mixing models
Creators: name: Hernández, A. E. Cárcamo
name: Varzielas, Ivo de Medeiros
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We propose a simple framework based on $Δ(27)$ that leads to the successful cobimaximal lepton mixing ansatz, thus providing a predictive explanation for leptonic mixing observables. We explore first the effective neutrino mass operators, then present a specific model realization based on type I seesaw, and also propose a model with radiative 1-loop seesaw which features viable dark matter candidates.
description: 8 pages. Version accepted for publication in Physics Letters B
Do Women Ask?
Creators: name: Artz, Benjamin
name: Goodall, Amanda H.
name: Oswald, Andrew J.
name: Artz, Benjamin
name: Goodall, Amanda H.
name: Oswald, Andrew J.
Publisher: name: Unknown
Year: 2016
Subjects: subject: Financial Economics
subject: matched employer-employee data
subject: female discrimination
subject: wages
subject: gender

description: Women typically earn less than men. The reasons are not fully understood. Previous studies argue that this may be because (i) women ‘don’t ask’ and (ii) the reason they fail to ask is out of concern for the quality of their relationships at work. This account is difficult to assess with standard labor-economics data sets. Hence we examine direct survey evidence. Using matched employer-employee data from 2013-14, the paper finds that the women-don’t-ask account is incorrect. Once an hours-of-work variable is included in ‘asking’ equations, hypotheses (i) and (ii) can be rejected. Women do ask. However, women do not get.
Optical Properties of Complex Dust Grains
Creators: name: Andersen, A. C.
name: Sotelo, J. A.
name: Niklasson, G. A.
name: Pustovit, V. N.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Dust particles in space may appear as clusters of individual grains. The morphology of these clusters could be of a fractal or more compact nature. To investigate how the cluster morphology influences the calculated extinction of different clusters in the wavelength range 0.1 - 100 micron, we have preformed extinction calculations of three-dimensional clusters consisting of identical touching spherical particles arranged in three different geometries: prefractal, simple cubic and face-centered cubic. In our calculations we find that the extinction of prefractal and compact clusters are of the same order of magnitude. For the calculations, we have performed an in-depth comparison of the theoretical predictions of extinction coefficients of multi-sphere clusters derived by rigorous solutions, on the one hand, and popular discrete-dipole approximations, on the other. This comparison is essential if one is to assess the degree of reliability of model calculations made with the discrete-dipole approximations, which appear in the literature quite frequently without an adequate accounting of their validity.
description: 19 pages, 10 figures, invited paper in Astrophysics of Dust, (eds.) A.N. Witt, B.T. Draine & G.C. Clayton, ASP Conference Series XX, 19 pages in press
Tough on young offenders : harmful or helpful?
Creators: name: Lotti, Giulia
name: Lotti, Giulia
Publisher: name: Unknown
Year: 2016
Subjects: Financial Economics

description: How harshly should society punish young lawbreakers? Through a fuzzy regression discontinuity design, I compare harsh and rehabilitative criminal incarceration practices. Young offenders sent to the more rehabilitative youth facilities become less likely to reoffend compared to offenders experiencing prison. On the contrary, offenders at the margin of being exposed to the harsher youth facilities are 27 percent more likely to recidivate in the nine years subsequent to their custody, and they are more likely to commit violent offences, thefts, burglaries and robberies. Keeping young offenders separate from their older peers in prison seems effective, but only in institutions not solely focused on punishment.
First-principles Equations of State and Structures of Liquid Metals in Multi-megabar Conditions
Creators: name: Zhang, Shuai
name: Morales, Miguel A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Liquid metals at extreme pressures and temperatures are widely interested in the high-pressure community. Based on density functional theory molecular dynamics, we conduct first-principles investigations on the equation of state (EOS) and structures of four metals (Cu, Fe, Pb, and Sn) at 1.5--5 megabar conditions and 5$\times10^3$--4$\times10^4$ K. Our first-principles EOS data enable evaluating the performance of four EOS models in predicting Hugoniot densities and temperatures of the four systems. We find the melting temperature of Cu is 1000--2000 K higher and shows a similar Clapeyron slope, in comparison to those of Fe. Our structure, coordination number, and diffusivity analysis indicates all the four liquid metals form similar simple close-packed structures. Our results set theoretical benchmarks for EOS development and structures of metals in their liquid states and under dynamic compression.
description: 16 pages, 6 figures, 3 tables; submitted to SCCM 2019 conference proceedings
Agrilus oceanicus Cobos 1959
Creators: name: Curletti, Gianfranco
name: Migliore, Letizia
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Buprestidae
Agrilus
Agrilus oceanicus

description: Agrilus oceanicus Cobos, 1959
 Agrilus oceanicus Cobos, 1959: 465.
 Material examinado: Parátipos, BRASIL, Pernanbuco, Ilha Fernando de Noronha, 9 exs., V.1954, M. Alvarenga leg.
description: Published as part of Curletti, Gianfranco & Migliore, Letizia, 2014, O gênero Agrilus Curtis, 1829 nas coleções do Museu de Zoologia da Universidade de São Paulo (Coleoptera: Buprestidae), pp. 81-106 in Papéis Avulsos de Zoologia (São Paulo) (São Paulo) 54 (8) on page 103, DOI: 10.1590/0031-1049.2014.54.08, http://zenodo.org/record/4656297
Stewardship in Irving Barber and Beyond
Creators: name: Lam, Tania
Publisher: name: The University of British Columbia
Year: 2010

description: Disclaimer: “UBC SEEDS provides students with the opportunity to share the findings of their studies, as well as their opinions, conclusions and recommendations with the UBC community. The reader should bear in mind that this is a student project/report and is not an official document of UBC. Furthermore readers should bear in mind that these reports may not reflect the current status of activities at UBC. We urge you to contact the research persons mentioned in a report or the SEEDS Coordinator about the current status of the subject matter of a project/report.”
Junaid-IEEE.pdf
Creators: name: Qadir, Junaid
Publisher: name: figshare
Year: 2020
Subjects: subject: 100510 Wireless Communications
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Owning to the vital resources in a harsh and unforeseeable aqueous environment, the network stability and reliability in underwater acoustic wireless sensor networks (UAWSNs) have paramount
significance. Stability guarantees the consistent performance of the network node’s energy consumption,
avoids data loss, packets reception time and network lifetime. The reliability of packet ensures the selection
of favorable channel and avoid adverse channel effects, and the vital information is easily obtained from
data packets. This paper introduces two new routing schemes for UAWSNs; stable and reliable short-path
routing (RSPR) scheme, and cooperative reliable short-path routing (CoRSPR). In RSPR routing, the destination node is selected by considering the weighting function parameters of the highest residual energy,
highest SNR, lowest euclidean distance, and least number of neighbor nodes. The scheme reduces the energy
consumption due to less number of nodes contribution in the packet advancement process. The RSPR
protocol is a non-cooperative technique, where the packets are delivered using a single-path link, which
may not be consistently reliable. To cope with this issue, the CoRSPR protocol is proposed, which takes
cooperative routing into account, for stable and reliable data delivery. In cooperative routing, the reception
of more than one copy of the data packet is involved by the destination node. This reduces the unfavorable
channel effects during data delivery. The simulation results show that the proposed schemes achieve better
performance in terms of dead nodes, energy left in the battery, packet acceptance ratio, successful receiving
of packets at the sink and E-2-E delay.
Quantile Graphical Models : Prediction and Conditional Independence with Applications to Financial Risk Management
Creators: name: Belloni, Alexandre
name: Chen, Mingli
name: Chernozhukov, Victor
name: Belloni, Alexandre
name: Chen, Mingli
name: Chernozhukov, Victor
Publisher: name: Unknown
Year: 2016
Subjects: subject: Financial Economics
subject: High-dimensional sparse model
subject: tail risk
subject: conditional independence
subject: nonlinear correlation
subject: penalized quantile regression
subject: systemic risk
subject: financial contagion
subject: downside movement

description: We propose Quantile Graphical Models (QGMs) to characterize predictive and conditional independence relationships within a set of random variables of interest. This framework is intended to quantify the dependence in non-Gaussian settings which are ubiquitous in many econometric applications. We consider two distinct QGMs. First, Condition Independence QGMs characterize conditional independence at each quantile index revealing the distributional dependence structure. Second, Predictive QGMs characterize the best linear predictor under asymmetric loss functions. Under Gaussianity these notions essentially coincide but non-Gaussian settings lead us to different models as prediction and conditional independence are fundamentally different properties. Combined the models complement the methods based on normal and nonparanormal distributions that study mean predictability and use covariance and precision matrices for conditional independence. We also propose estimators for each QGMs. The estimators are based on high-dimension techniques including (a continuum of) ℓ1-penalized quantile regressions and low biased equations, which allows us to handle the potentially large number of variables. We build upon recent results to obtain valid choice of the penalty parameters and rates of convergence. These results are derived without any assumptions on the separation from zero and are uniformly valid across a wide-range of models. With the additional assumptions that the coefficients are well-separated from zero, we can consistently estimate the graph associated with the dependence structure by hard thresholding the proposed estimators. Further we show how QGM can be used to represent the tail interdependence of the variables which plays an important role in application concern with extreme events in opposition to average behavior. We show that the associated tail risk network can be used for measuring systemic risk contributions. We also apply the framework to study financial contagion and the impact of downside movement in the market on the dependence structure of assets’ return. Finally, we illustrate the properties of the proposed framework through simulated examples.
title: Learning and Teaching in the Non-Formal Virtual World: A Multimodal Study of Learning-Teaching Interaction in the Virtual World of Schome Park
Creators: name: Sapkota, Santosh
Publisher: name: The Open University
Year: 2008

description: Recently, there has been growing interest in the possibility of utilizing three-dimensional (3D) virtual worlds, such as Second Life (SL), as a platform for education. This micro-ethnographic investigation based on video-recorded data, and conducted employing participation observation, explores the way in which the processes of guided participation, are negotiated multimodally, while accomplishing problem-solving tasks, in Schome Park (i.e., a teen grid located within SL). The study reveals that the experts structured novices' efforts and participation by employing strategies such as providing directing instruction, subdividing the task, and demonstration. However, it was found that there was a lack of affordances in order to be able to view demonstration. As a result, the significant aspect of learning that occurs through observation and active participation, or through guided or intent participation, has been demoted in the SL environment. Additionally, it was found that the constraints of technology restricted participants use of speech/voice effectively in the process of pedagogic task accomplishment. Therefore, typed-writing and Netspeak (i.e. hybrid language having features of speech, writing and electronic mediated properties), actions and visual images were the most frequently used modes used to enhance the processes of learning and teaching. Finally, the study highlights some issues and challenges encountered while conducting ethnographic study in a 3-D graphical environment, and also presents some advantages, and limitations, of conducting research using Avatars.
Poster: Testing Complex Event Patterns
Creators: name: Maslanka, Pawel
name: Zielinski, Bartosz
Publisher: name: Zenodo
Year: 2021
Subjects: complex event processing
testing
symbolic execution
narrowing

description: Recent years brought increased popularity and importance of complex event processing (CEP) and associated query languages. CEP systems can easily become overwhelming and hard to understand. Hence the desirability of executable semantics and symbolic execution for CEP systems allowing for testing, simulation and verification. We demonstrate how constraint logic programming can be leveraged for the purpose by providing a proof-of-concept, non-deterministic semantics written in Prolog for a simple event stream matching language based on regular expressions. The semantics lends itself naturally to effective symbolic execution using narrowing combined with solving constraints. The result, aside from direct practical applications, is also of a more general interest as it demonstrates the benefits of combining narrowing (which provides constraint solving for general algebraic datatypes) with efficient constraint solvers for specific domains such as integer or real numbers.
MULTI-ATTRIBUTE DECISION BY SAMPLING : AN ACCOUNT OF THE ATTRACTION, COMPROMISE AND SIMILARITY EFFECTS
Creators: name: Ronayne, David
name: Brown, Gordon D.A.
name: Ronayne, David
name: Brown, Gordon D.A.
Publisher: name: Unknown
Year: 2016
Subjects: subject: Financial Economics
subject: consumer choice
subject: context effects
subject: sampling

description: Consumers’ choices are typically influenced by the choice context in ways that standard models cannot explain. We provide a concise explanation of the attraction, compromise and similarity effects. The model, Multi-Attribute Decision by Sampling (MADS) posits that the evaluation of a choice option is based on its relative position in the market distribution as first inferred and then sampled by the decision-maker. The inferred market distribution is assumed to be systematically influenced by the choice options. The value of a choice option is assumed to be determined by the number of sampled comparators that the option dominates. We specify conditions on the sampling distribution that are sufficient for MADS to predict the three context effects. We tested the model using a novel experimental design with 1,200 online participants. In the first experiment, prior to making a choice participants were shown a selection of market options designed to change their beliefs about the market distribution. Participants’ subsequent choices were affected as predicted. The effect was strong enough to impact the size of two of the three classic context effects significantly. In the second experiment, we elicited individuals’ estimates of distributions of market options and found the estimates to be systematically influenced by the choice set as predicted by the model. It is concluded that MADS, a model based on simple binary ordinal comparisons, is sufficient to account for the three classic context effects.