cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Time Resolved Multivariate Pattern Analysis for Infant EEG Data
Creators: name: Ashton, Kira
Publisher: name: ProQuest
Year: 2023
Subjects: classificationCode: 3209
subject: Neurosciences
subject: FOS: Clinical medicine
classificationCode: 52
subject: Psychology
subject: FOS: Psychology
classificationCode: 5201
subject: Applied and developmental psychology

description: Time-resolved multivariate pattern analysis (MVPA), a technique for analyzing magneto- and electro-encephalography (M/EEG) data, quantifies the extent and timecourse of neural representations that support the discrimination of stimuli. Because MVPA is yet to be widely applied in infant research, there is a need to develop best practices that account for the limitations of infant neuroimaging (i.e., limited data, noise). We assessed MVPA analysis approaches with infant EEG data, including manipulating trials per stimulus, and preprocessing procedures. MVPA was performed to examine the timecourse of infants’ neural representations supporting image discrimination, resulting in significantly distinct neural representations for the images against a chance level of 50%, as well as an empirical chance generated by repeated permutation of the data. Geometric and accuracy-based Representational Dissimilarity Matrices (RDMs) were additionally generated to characterize the space of neural representations. In this work we investigate best practices for MVPA with infant EEG such as preprocessing, determining valid trial thresholds, and classification algorithms, and outline issues when there are deviations from these recommendations.
Structure-preserving Reduced Order Modeling of non-traditional Shallow Water Equation
Creators: name: Yıldız, Süleyman
name: Uzunca, Murat
name: Karasözen, Bülent
Publisher: name: arXiv
Year: 2020
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 65M06, 65P10

description: An energy preserving reduced order model is developed for the nontraditional shallow water equation (NTSWE) with full Coriolis force. The NTSWE in the noncanonical Hamiltonian/Poisson form is discretized in space by finite differences. The resulting system of ordinary differential equations is integrated in time by the energy preserving average vector field (AVF) method. The Poisson structure of the NTSWE in discretized exhibits a skew-symmetric matrix depending on the state variables. An energy preserving, computationally efficient reduced-order model (ROM) is constructed by proper orthogonal decomposition with Galerkin projection. The nonlinearities are computed for the ROM efficiently by discrete empirical interpolation method. Preservation of the semi-discrete energy and the enstrophy are shown for the full order model, and for the ROM which ensures the long term stability of the solutions. The accuracy and computational efficiency of the ROMs are shown by two numerical test problems
description: 17 pages, 7 figures. arXiv admin note: text overlap with arXiv:1907.09406
Tryphopsichara australiana Pace 2015, spec. nov.
Creators: name: Pace, Roberto
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Tryphopsichara
Tryphopsichara australiana

description: Tryphopsichara australiana spec. nov.
(Figs 7, 33–37)
 Type material: Holotype , Australia, NSW Bowraville, Agent Hill, 10.II.1997, leg. Wachtel (CSCÜ).
 Description: Length 3.0 mm. Body shiny, reddish, posterior half of the elytra with a brown macula that does not reach the posterior margin, free abdominal tergites 3 to 5, with base brown, antennae brown with the four basal antennomeres and base of fifth yellowish-red. Eyes as long as the postocular region in dorsal view. Second antennomere shorter than the first one, third shorter than the second one, fourth longer than wide, fifth to tenth transverse. Reticulation of the head evident, that of pronotum and elytra superficial, wanting on the four basal free tergites, on the fifth free tergite of the female strong. The whole body with evident and close dotting. Spermatheca as in Fig. 33.
 Etymology: The new species coming its name from Australia.
description: Published as part of Pace, Roberto, 2015, New genera and new species of Aleocharinae from Australia (Coleoptera, Staphylinidae), pp. 327-339 in Beiträge Zur Entomologie = Contributions to Entomology 65 (2) on page 331, DOI: 10.21248/contrib.entomol.65.2.327-339, http://zenodo.org/record/4754013
Experimental and Numerical Analysis of Bulletproof Armor made from Polymer Composite Materials
Creators: name: Oleiwi, Jawad K.
Publisher: name: figshare
Year: 2020
Subjects: subject: 91202 Composite and Hybrid Materials
subject: FOS: Materials engineering
subject: 91299 Materials Engineering not elsewhere classified

description: This work focuses on the preparation of polymer matrix composite specimens by (Hand Lay-Up) method to make bulletproof armor from the unsaturated polyester resin (UP) as a matrix reinforced by Kevlar fibers at different volume fractions with and without (3%) of Al2O3 powder. The tensile test was performed for these composite specimens which include: (modulus of elasticity, tensile strength and elongation percentage), in addition of ballistic test were studied.The results of this work show that the values of tensile test increase with increasing the volume fraction of fibers. And the values of tensile test of a composite reinforced by kevlar fibers and addition (3%) of Al2O3 powder was less than those composite without addition of Al2O3 powder.The numerical method based on FEM was used to analysis of the bullet proof armor ballistic test of the composite specimens by finding the values of stresses, strains and deformations. The numerical results that obtained from the program (ANSYS 14.5) represent the maximum value of stress happened to the composite specimens when reinforced by eight layers of the kevlar, and vice versa to the deformations and strain also the numerical results shown a good agreement with results that were obtained experimentally. Results of ballistic test of composite specimens show the volume fraction of fibers has an effect on the deformations of the front face and back face of these composite specimens. And the values of the ballistic test for the composite reinforced by kevlar at eight layers give the best values from other each of composite specimens.
Study the Effect of Iron Powder Additives on Mechanical properties of Recycling of Aluminum Cans Scrap
Creators: name: Oleiwi, Jawad K.
Publisher: name: figshare
Year: 2020
Subjects: subject: 91207 Metals and Alloy Materials
subject: FOS: Materials engineering
subject: 210203 Materials Conservation
subject: FOS: Media and communications
subject: 91299 Materials Engineering not elsewhere classified

description: This paper involves the effect of iron powder in recycling of aluminum cans scrap on some mechanical properties. This process includes burning aluminum cans to remove paint and shredding into small pieces then melting aluminum pieces using an electrical furnace at (750 ºC). Iron powder (0.6, 1.2 and 1.8 wt %) was added to the melt sequentially. The composition is then casted into cylinder steel molds. The mechanical and metallurgical characteristics of thefabricated alloys were studied through an optical microscope including hardness, tensile testing, scanning electronic microscope and X-ray fluorescence. The results indicated that the maximum value of tensile strength and elongation percentage are recorded for the addition of (1.2%) ofIron powder. While maximum modulus of elasticity reported was at (0.6%) Iron powder cast. Hardness also increased with the increase of Iron additives.
Is charity a homogeneous good?
Creators: name: Backus, Peter
name: Backus, Peter
Publisher: name: Unknown
Year: 2010
Subjects: Financial Economics

description: In this paper I estimate income and price elasticities of donations to six different charitable causes to test the assumption that charity is a homogeneous good. In the US, charitable donations can be deducted from taxable income. This has long been recognized as producing a price, or taxprice, of giving equal to one minus the marginal tax rate faced by the donor. A substantial portion of the economic literature on giving has focused on estimating price and income elasticities of giving as the received wisdom suggests that a price elasticity greater than unity is indicative of the ‘treasury efficiency’ of the tax deductibility of charitable contributions, as the loss to tax revenue is less than the increase in giving. However, a major limitation of nearly all the previous attempts to identify such effects has been the implicit assumption that charity is a homogeneous good, meaning giving to one type of charity is a perfect substitute for any other and that the causespecific responsiveness of giving to changes in price and income is equal across those causes. If this assumption is violated, then estimates may be biased and policies designed to increase charitable contributions may be sub-optimal. Results suggest that the tax-price of giving only affects giving to religious organisations and that the income effect is invariant over charitable causes.
Mimacrotona bowravillensis Pace 2015, spec. nov.
Creators: name: Pace, Roberto
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Mimacrotona
Mimacrotona bowravillensis

description: Mimacrotona bowravillensis spec. nov.
(Figs 14, 52)
 Type material: Holotype , Australia, NSW Bowraville, Argent Hill, 10.11.1997, leg. Wachtel (CSCÜ).
 Description: Length 1.39 mm. Body shiny, yellowish-red, elytra lost, antennae brown with the two basal antennomeres, base of third and eleventh yellow, legs yellow. Eyes as long as the postocular region in dorsal view. Second antennomere longer than the first one, third shorter than the second one, fourth to tenth transverse. Reticulation of the body superficial; Head dotting delicate and superficial. Granulation of the pronotum delicate, close and evident, that of the abdomen salient and sparse. Aedeagus as in Fig. 52.
 Comparative notes: The new species is the first known from Australia with two ventral laminae of the aedeagus, not even present in species of the oriental region.
 Etymology: The new species coming its name from the toponym Bowraville.
description: Published as part of Pace, Roberto, 2015, New genera and new species of Aleocharinae from Australia (Coleoptera, Staphylinidae), pp. 327-339 in Beiträge Zur Entomologie = Contributions to Entomology 65 (2) on page 333, DOI: 10.21248/contrib.entomol.65.2.327-339, http://zenodo.org/record/4754013
Examining social and emotional skills adolescent Black girls need to remain motivated to pursue science, technology, engineering and mathematics careers
Creators: name: Jones, Dia L.
Publisher: name: American University
Year: 2023

description: Living through the COVID-19 pandemic, the world learned our survival depended on having a diverse science, technology, engineering, and math (STEM) workforce to support innovation for all people. The ingenuity and the voices of all demographics of people to create immediate STEM solutions to this crisis were invaluable. Only 7% of STEM undergraduate degrees are awarded to Black women in the United States (Burke et al., 2022). This number must be increased to have more diverse voices in STEM fields to help develop critical solutions (Burke et al., 2022). This study aimed to add to the research to increase the participation of Black women in STEM ecosystems across the country by reducing the attrition of adolescent Black girls who want to have STEM careers. This qualitative study examined the social and emotional supports adolescent Black girls needed to remain motivated to pursue STEM careers. For this qualitative study, I used a Black Feminist Thought Framework to create a safe and affirming space for the adolescent Black girl participants to define their social and emotional needs for themselves (Collins, 1990). The methodological approach I used was participatory action research to support data collection. I reviewed previous literature about the social and emotional barriers Black women and girls state increased their pushout in STEM environments to determine common themes. Those common themes were: identity, self-awareness, belongingness, and self-efficacy. Using a participatory research approach, the intervention involved delivering culturally relevant STEM social and emotional learning (SEL) lessons using the themes to collaborate with the participants to develop solutions for STEM ecosystems to increase the participation of Black girls in STEM.
title: Edge-colourings of graphs
Creators: name: Chetwynd, Amanda Gillian
Publisher: name: The Open University
Year: 1984

description: All the results in this thesis are concerned with the classification of graphs by their chromatic class. We first extend earlier results of Fiorini and others to give a complete list of critical graphs of order at most ten. We give conditions for extending the edge-colouring of a nearly complete subgraph to the whole graph and use this result to prove a special case of Vizing's conjecture. We also use other methods to solve further cases of this conjecture. A major part of the thesis classifies those graphs with at most 4 vertices of maximum degree and this work is generalised to graphs with r vertices of maximum degree. We also completely classify all regular graphs G with degree at least 6/7|V(G)|. Finally we give some examples of even order critical graphs and introduce the concept of a supersnark.
A proof of validity for multiphase Whitham modulation theory
Creators: name: Bridges, Tom
name: Kostianko, Anna
name: Schneider, Guido
Publisher: name: arXiv
Year: 2020
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: It is proved that approximations which are obtained as solutions of the multiphase Whitham modulation equations stay close to solutions of the original equation on a natural time scale. The class of nonlinear wave equations chosen for the starting point is coupled nonlinear Schrödinger equations. These equations are not in general integrable, but they have an explicit family of multiphase wavetrains that generate multiphase Whitham equations which may be elliptic,hyperbolic, or of mixed type. Due to the change of type, the function space setup is based on Gevrey spaces with initial data analytic in a strip in the complex plane. In these spaces a Cauchy- Kowalevskaya-like existence and uniqueness theorem is proved. Building on this theorem and higher-order approximations to Whitham theory, a rigorous comparison of solutions, of the coupled nonlinear Schrödinger equations and the multiphase Whitham modulation equations, is obtained.
description: 21 pages, no figures
Appendix to Frederik Dhondt and Steffen Ducheyne, 'Theological and Religious Statements in Isaac Newton's Queries/Quaestiones to the Opticks/Optice, 1704-1730', European Journal of Science and Theology, vol. 17(3), 2021: Relevant fragments in Cambridge University Library, Add. MS. 3970
Creators: name: Ducheyne, Steffen
name: Dhondt, Frederik
Publisher: name: Zenodo
Year: 2021
Subjects: Isaac Newton
Isaac Newton's religious views
Queries/Quaestiones to the Opticks/Optice

description: This document contains the appendix to a paper of ours that was published in 2021 in the European Journal of Science and Theology, vol. 17(3). It presents the manuscript material we have analysed in this paper and it also provides evidence for the relative datings we have offered there.
description: Funding: Special Research Fund of the Vrije Universiteit Brussel (BOF), Grants WT125 and SRP61. Acknowledgements: We acknowledge that we have extensively relied on material available at http://www.newtonproject.ox.ac.uk/view/texts/normalized/NATP00055.
Examining social and emotional skills adolescent Black girls need to remain motivated to pursue science, technology, engineering and mathematics careers
Creators: name: Jones, Dia L.
Publisher: name: ProQuest
Year: 2023
Subjects: classificationCode: 39
subject: Education
classificationCode: 3904
subject: Specialist studies in education

description: Living through the COVID-19 pandemic, the world learned our survival depended on having a diverse science, technology, engineering, and math (STEM) workforce to support innovation for all people. The ingenuity and the voices of all demographics of people to create immediate STEM solutions to this crisis were invaluable. Only 7% of STEM undergraduate degrees are awarded to Black women in the United States (Burke et al., 2022). This number must be increased to have more diverse voices in STEM fields to help develop critical solutions (Burke et al., 2022). This study aimed to add to the research to increase the participation of Black women in STEM ecosystems across the country by reducing the attrition of adolescent Black girls who want to have STEM careers. This qualitative study examined the social and emotional supports adolescent Black girls needed to remain motivated to pursue STEM careers. For this qualitative study, I used a Black Feminist Thought Framework to create a safe and affirming space for the adolescent Black girl participants to define their social and emotional needs for themselves (Collins, 1990). The methodological approach I used was participatory action research to support data collection. I reviewed previous literature about the social and emotional barriers Black women and girls state increased their pushout in STEM environments to determine common themes. Those common themes were: identity, self-awareness, belongingness, and self-efficacy. Using a participatory research approach, the intervention involved delivering culturally relevant STEM social and emotional learning (SEL) lessons using the themes to collaborate with the participants to develop solutions for STEM ecosystems to increase the participation of Black girls in STEM.
Large deviations of connected components in the stochastic block model
Creators: name: Schawe, Hendrik
name: Hartmann, Alexander K.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We study the stochastic block model which is often used to model community structures and study community-detection algorithms. We consider the case of two blocks in regard to its largest connected component and largest biconnected component, respectively. We are especially interested in the distributions of their sizes including the tails down to probabilities smaller than $10^{-800}$. For this purpose we use sophisticated Markov chain Monte Carlo simulations to sample graphs from the stochastic block model ensemble. We use this data to study the large-deviation rate function and conjecture that the large-deviation principle holds. Further we compare the distribution to the well known Erdős-Rényi ensemble, where we notice subtle differences at and above the percolation threshold.
description: 12 pages, 8 figures
Emotional Prosperity and the Stiglitz Commission
Creators: name: Oswald, Andrew J.
name: Oswald, Andrew J.
Publisher: name: Unknown
Year: 2010
Subjects: subject: Financial Economics
subject: Well-being
subject: biomarkers
subject: GHQ
subject: happiness
subject: Easterlin paradox

description: This paper argues -- in line with the proposals of the recent Stiglitz Commission on the Measurement of Economic Performance and Social Progress -- that we should now be measuring a nation‟s emotional prosperity rather than its economic prosperity (that is, we ought to focus on the level of mental well-being not the number of pounds in people‟s bank accounts). The paper reviews recent ideas in this field. It also describes seven recent studies that, worryingly, suggest that emotional prosperity may be declining through time. For labourmarket specialists, a key question for future research is how much this downward trend can be traced back to increased pressures in working life. That question currently remains open.
Three-loop $β$-function for N=1 supersymmetric electrodynamics, regularized by higher derivatives
Creators: name: Soloshenko, A. A.
name: Stepanyantz, K. V.
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Three-loop quantum corrections to the effective action are calculated for N=1 supersymmetric electrodynamics, regularized by higher derivatives. Using the obtained results we investigate the anomaly puzzle in the considered model.
description: LaTeX, 37 pages, 10 eps figures
Austracoenonica Pace 2015, gen. nov.
Creators: name: Pace, Roberto
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Austracoenonica

description: Austracoenonica gen. nov.
(Figs 6, 28–32)
 Diagnosis: The new genus is similar to the genus Coenonica KRAATZ, 1857 which is distributed mainly in the oriental region. It is recognizable by the pronotum without impressions or strong basal punctures as in Coenonica and, above all, by the ligula which is longer than in Coenonica.
 Description: Habitus as in Fig. 6. Antennae 11-segmented. Eyes longer than the postocular region in dorsal view, temporal sulcus present; labial palpi 2-segmented (Fig. 30); ligula long, shortly split in two lobes at apex (Fig. 30), paraglossae with protruding setae in front; maxillary palpi 4-segmented, rather narrow, with the apical segment awl-shaped and very long (Fig. 32), inner lobe very narrow towards apex, the outer lobe longer than the inner (Fig. 32). Anterior edge of the mentum emarginate (Fig. 31). Mesosternal process acute, mesocoxae contiguous. Tarsal formula 4-4-5. First posterior tarsomere a little longer than the second one. Aedeagus as in Figs 28-29.
 Type species: Austracoenonica laminaris spec. nov.
 Etymology: The name of the new genus is composed by “ Australia ” and “ Coenonica ”.
description: Published as part of Pace, Roberto, 2015, New genera and new species of Aleocharinae from Australia (Coleoptera, Staphylinidae), pp. 327-339 in Beiträge Zur Entomologie = Contributions to Entomology 65 (2) on page 330, DOI: 10.21248/contrib.entomol.65.2.327-339, http://zenodo.org/record/4754013
Studying the Tensile and Buckling for PMMA Reinforced by Jute Fibers for Prosthetic Pylon
Creators: name: Oleiwi, Jawad K.
Publisher: name: figshare
Year: 2020
Subjects: subject: 90301 Biomaterials
subject: FOS: Medical engineering
subject: 91202 Composite and Hybrid Materials
subject: FOS: Materials engineering
subject: 91299 Materials Engineering not elsewhere classified

description: The main objective of this research is studying the tensile and buckling of Jute fibers reinforced composite by varying the number of Jute fibers layers and fibers angle (±45° &0°/90°). Vacuum bagging technique was adopted for the preparation of laminated composite specimens that made from PMMA as matrix and Perlon layers with different number of Jute fibers layers as reinforcement materials. Also the finite element method (ANSYS-15) was usedby creating a model of prosthetic pylon and applied compressive load at heel strike step from gait cycle to know the critical buckling stress. The results showed that the best laminated composite specimens have three Jute fibers layers at (0 º /90 º) fibers orientation relative to applied load. Where, the critical buckling stress, tensile strength, and modulus of elasticity were (442MPa, 61MPa, and 3.75GPa) respectively, while, the percentage elongation was (2.1).
The Leoncino Dwarf Galaxy: Exploring the Low-Metallicity End of the Luminosity-Metallicity and Mass-Metallcity Relations
Creators: name: McQuinn, Kristen. B. W.
name: Berg, Danielle A.
name: Skillman, Evan D.
name: Adams, Elizabeth
name: Cannon, John M.
name: Dolphin, Andrew E.
name: Salzer, John J.
name: Giovanelli, Riccardo
name: Haynes, Martha P.
name: Hirschauer, Alec S.
name: Janoweicki, Steven
name: Klapkowski, Myles
name: Rhode, Katherine L.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Extremely metal-poor (XMP) galaxies are low-mass, star-forming galaxies with gas-phase oxygen abundances below 12+log(O/H) = 7.35 (~1/20 Zsun). Galaxy evolution scenarios suggest three pathways to form an XMP: (1) secular evolution at low galaxy masses, (2) slow evolution in voids, or (3) dilution of measured abundances from infall of pristine gas. The recently discovered XMP galaxy Leoncino, with an oxygen abundance below 3% Zsun, provides an opportunity to explore these different scenarios. Using Hubble Space Telescope imaging of the resolved stellar populations of Leoncino, we measure the distance to the galaxy to be D=12.1 (+1.7/-3.4) Mpc and find that Leoncino is located in an under-dense environment. Leoncino has a compact morphology, hosts a population of young, massive stars, has a high gas-to-star mass ratio, and shows signs of interaction with a galaxy nearby on the sky, UGC 5186. Similar to nearly all XMP galaxies known in the nearby universe, Leoncino is offset from the Luminosity-Metallicity (LZ) relation. Yet, Leoncino is consistent with the stellar Mass-Metallicity (MZ) relation defined by Local Volume galaxies. Thus, our results suggest that the offset from the LZ relation is due to higher recent star formation, likely triggered by a minor interaction, while the low oxygen abundance is consistent with the expectation that low-mass galaxies will undergo secular evolution marked by inefficient star formation and metal-loss via galactic winds. This is in contrast to XMP galaxies that are outliers in both the LZ and MZ relations; in such cases, the low oxygen abundances are best explained by dilution due to the infall of pristine gas. We also discuss why quiescent XMP galaxies are underrepresented in current surveys.
description: 20 pages, 8 figures, 1 table
Azimthally sensitive femtoscopy and v2
Creators: name: Tomasik, Boris
Publisher: name: arXiv
Year: 2005
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: I investigate the correlation between spatial and flow anisotropy in determining the elliptic flow and azimuthal dependence of the HBT correlation radii in non-central nuclear collisions. It is shown that the correlation radii are in most cases dominantly sensitive to the anisotropy in space. In case of v2, the correlation depends strongly on particle species. A procedure for disentangling the spatial and the flow anisotropy is proposed.
description: proceedings of Workshop on particle correlations and femtoscopy, Aug.15-17, 2005, Kromeriz, Czech Republic, 6 pages
Comparing Effect of Adding LDPE, PP, PMMA on The Mechanical Properties of Polystyrene (PS)
Creators: name: Oleiwi, Jawad K.
Publisher: name: figshare
Year: 2020
Subjects: subject: 91202 Composite and Hybrid Materials
subject: FOS: Materials engineering
subject: 91299 Materials Engineering not elsewhere classified

description: In this research three groups of polymer blends have been prepared First group included (Polystyrene (PS): Low density polyethylene (LDPE))While the Secondgroup(included Polystyrene (PS): Polypropylene (PP)) and Third groups include (Polystyrene (PS): Poly methel methacrylate (PMMA)) are prepared in different ratiosby melt blending technique which was carried out using a double screw extruder. The tensile, flexural, impact and hardness test are used to study mechanical properties ofpolymer blends. The results from this work show that the impact properties for blends system increases with increases each of (LDPE, PP and PMMA) content in polymer blends of (PS: LDPE), (PS: PP) and (PS: PMMA). The elongation property increases with increases LDPE and PP but decreases when adding PMMA in polymer blend.
Your call: eBay and demand for the iPhone 4
Creators: name: Waterson, Michael
name: Doyle, Chris
name: Waterson, Michael
name: Doyle, Chris
Publisher: name: Unknown
Year: 2010
Subjects: subject: Financial Economics
subject: eBay auctions
subject: demand revelation
subject: auctions
subject: bidding
subject: short supply
subject: versioning

description: The iPhone 4 was introduced into the UK market on 24th June 2010 to significant consumer interest. This clearly exceeded supply through conventional channels, since there was very extensive activity in terms of bidding on eBay auctions for the product. We monitored all eBay transactions on the iPhone 4 for six weeks from introduction, with total transactions amounting to around £1.5m. We analyse determinants of the winning bid in terms of characteristics of the phone, the seller and the buyer. Our most notable and novel finding relative to previous studies is a very significant premium over list price being paid in almost all cases, with positive uplift factors including whether the phone was unlocked and whether it could be sold overseas. Demand fell over time, as evidenced by lower achieved prices, but the fall in price was relatively modest. A significant premium of 32GB over 16GB versions is revealed.
An experimental and computational investigation of structure and magnetism in pyrite Co$_{1-x}$Fe$_x$S$_2$: Chemical bonding and half-metallicity
Creators: name: Ramesha, K.
name: Seshadri, Ram
name: Ederer, Claude
name: He, Tao
name: Subramanian, M. A.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Bulk samples of the pyrite chalcogenide solid solutions Co$_{1-x}$Fe$_x$S$_2$ 0 <= x <= 0.5, have been prepared and their crystal structures and magnetic properties studied by X-ray diffraction and SQUID magnetization measurements. Across the solution series, the distance between sulfur atoms in the persulfide (S$_2^{2-}$) unit remains nearly constant. First principles electronic structure calculations using experimental crystal structures as inputs point to the importance of this constant S-S distance, in helping antibonding S-S levels pin the Fermi energy. In contrast hypothetical rock-salt CoS is not a good half metal, despite being nearly isostructural and isoelectronic. We use our understanding of the Co$_{1-x}$Fe$_x$S$_2$ system to make some prescriptions for new ferromagnetic half-metals.
description: 8 pages including 9 figures
Tensile and Buckling of Prosthetic Pylon Made from Hybrid Composite Materials
Creators: name: Oleiwi, Jawad K.
Publisher: name: figshare
Year: 2020
Subjects: subject: 90301 Biomaterials
subject: FOS: Medical engineering
subject: 91202 Composite and Hybrid Materials
subject: FOS: Materials engineering
subject: 91299 Materials Engineering not elsewhere classified

description: Compared to traditional prosthetic pylon materials (Aluminum, Titanium, or Stainless steel.), composite prosthetic pylon materials are used instead of metals. Vacuum bagging technique was adopted for the preparation of specimens made of Poly methyl methacrylate (PMMA) as matrix with constant Perlon layers and different number of Hybrid (Carbon + Glass) fibers layers as reinforcement materials at (±45º&0º/90º) orientation relative to applied load. Also the finite element method (ANSYS-15) were used by create a model of prosthetic pylon and applied compressive load at heel strike step from gait cycle to known the critical buckling stress. The experimental and numerical results shown that the tensile strength, modulus of elasticity, and critical buckling stress increases with increasing number of Hybrid fibers layers, that equal to (145 MPa, 6.25 GPa, and 670 MPa) respectively, and the percentage of increase in tensile strength, modulus of elasticity, and critical buckling stress for specimen with three Hybrid (Carbon + Glass) layers and Perlon layers in PMMA resin compared with pure PMMA specimen was (302.7% , 300% & 257.22%) respectively, at (0º/90º) fibers orientation relative to tensile force.
Event-Triggered Consensus of Homogeneous and Heterogeneous Multi-Agent Systems with Jointly Connected Switching Topologies
Creators: name: Cheng, Bin
name: Wang, Xiangke
name: Li, Zhongkui
Publisher: name: arXiv
Year: 2020
Subjects: subject: Systems and Control (eess.SY)
subject: Optimization and Control (math.OC)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Mathematics

description: This paper investigates the distributed event-based consensus problem of switching networks satisfying the jointly connected condition. Both the state consensus of homogeneous linear networks and output consensus of heterogeneous networks are studied. Two kinds of event-based protocols based on local sampled information are designed, without the need to solve any matrix equation or inequality. Theoretical analysis indicates that the proposed event-based protocols guarantee the achievement of consensus and the exclusion of Zeno behaviors for jointly connected undirected switching graphs. These protocols, relying on no global knowledge of the network topology and independent of switching rules, can be devised and utilized in a completely distributed manner. They are able to avoid continuous information exchanges for either controllers' updating or triggering functions' monitoring, which ensures the feasibility of the presented protocols.
description: This paper is an updated version of our paper published by IEEE Trans. Cybernetics, with corrections in the proof of Theorem 1. 11 pages and 4 figures
Three Dimensional Annihilation Imaging of Antiprotons in a Penning Trap
Creators: name: Fujiwara, M. C.
name: Amoretti, M.
name: Bonomi, G.
name: Bouchta, A.
name: Bowe, P. D.
name: Carraro, C.
name: Cesar, C. L.
name: Charlton, M.
name: Doser, M.
name: Filippini, V.
name: Fontana, A.
name: Funakoshi, R.
name: Genova, P.
name: Hangst, J. S.
name: Hayano, R. S.
name: Jorgensen, L. V.
name: Lagomarsino, V.
name: Landuad, R.
name: Lindelof, D.
name: Rizzini, E. Lodi
name: Macri, M.
name: Madsen, N.
name: Marchesotti, M.
name: Montagna, P.
name: Pruys, H.
name: Regenfus, C.
name: Rielder, P.
name: Rotondi, A.
name: Testera, G.
name: Variola, A.
name: van der Werf, D. P.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Experiment (nucl-ex)
subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: We demonstrate three-dimensional annihilation imaging of antiprotons trapped in a Penning trap. Exploiting unusual feature of antiparticles, we investigate a previously unexplored regime in particle transport; the proximity of the trap wall. Particle loss on the wall, the final step of radial transport, is observed to be highly non-uniform, both radially and azimuthally. These observations have considerable implications for the production and detection of antihydrogen atoms.
description: Invited Talk at NNP03, Workshop on Non-Neutral Plasmas, 2003
How Should Financial Intermediation Services be Taxed?
Creators: name: Lockwood, Ben
name: Lockwood, Ben
Publisher: name: Unknown
Year: 2010
Subjects: subject: Financial Economics
subject: financial intermediation services
subject: tax design
subject: banks
subject: monitoring
subject: payment services

description: This paper considers the optimal taxation of savings intermediation and payment services in a dynamic general equilibrium setting, when the government can also use consumption and income taxes. When payment services are used in strict proportion to …nal consumption, and the cost of intermediation services is …xed and the same across …rms, the optimal taxes are generally indeterminate. But, when …rms di¤er exogenously in the cost of intermediation services, the tax on savings intermediation should be zero. Also, when household time and payment services are substitutes in transactions, the optimal tax rate on payment services is determined by the returns to scale in the conditional demand for payment services, and is generally di¤erent to the optimal rate on consumption goods. In particular, with constant returns to scale, payment services should be untaxed. These results can be understood as applications of the Diamond-Mirrlees production e¢ciency theorem. Finally, as an extension, we endogenize intermediation, in the form of monitoring, and show that it may be oversupplied in equilibrium when banks have monopoly power, justifying a Pigouvian tax in this case.
Austraepiskia barrinensis Pace 2015, spec. nov.
Creators: name: Pace, Roberto
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Austraepiskia
Austraepiskia barrinensis

description: Austraepiskia barrinensis spec. nov.
(Figs 5, 24–27)
 Type material: Holotype , Australia, Queensland, Atherton TL, Lake Barrine NP, 30.X.1989, leg. H. Heiss (CSCÜ).
 Description: Length 2.2 mm Fore-body opaque, abdomen shiny. Body reddish, external posterior angles of the elytrae and posterior half of the paratergites brown, antennae brown with the two basal antennomeres yellowish-red and eleventh yellow, legs yellowish-red with distal third of the posterior femurs brown. Eyes shorter than the postocular region in dorsal view. Second antennomere as long as the first one, third longer than the second one, fourth to sixth longer than wide, seventh as long as wide, eighth to tenth transverse. Fore-body covered with close and salient granules, with wrinkled aspect, abdomen with granularity delicate and few salient. Spermatheca as in Fig. 24.
 Etymology: The new species name come from Lake Barrine.
description: Published as part of Pace, Roberto, 2015, New genera and new species of Aleocharinae from Australia (Coleoptera, Staphylinidae), pp. 327-339 in Beiträge Zur Entomologie = Contributions to Entomology 65 (2) on page 330, DOI: 10.21248/contrib.entomol.65.2.327-339, http://zenodo.org/record/4754013
A probabilistic analysis of the Fermi paradox in terms of the Drake formula: the role of the L factor
Creators: name: Prantzos, Nikos
Publisher: name: arXiv
Year: 2020
Subjects: subject: Popular Physics (physics.pop-ph)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: In evaluating the number of technological civilizations N in the Galaxy through the Drake formula, emphasis is mostly put on the astrophysical and biotechnological factors describing the emergence of a civilization and much less on its the lifetime, which is intimately related to its demise. It is argued here that this factor is in fact the most important regarding the practical implications of the Drake formula, because it determines the maximal extent of the "sphere of influence" of any technological civilization. The Fermi paradox is studied in the terms of a simplified version of the Drake formula, through Monte Carlo simulations of N civilizations expanding in the Galaxy during their space faring lifetime L. In the framework of that scheme, the probability of "direct contact" is determined as the fraction of the Galactic volume occupied collectively by the "spheres of influence" of N civilizations. The results of the analysis are used to determine regions in the parameter space where the Fermi paradox holds. It is argued that in a large region of the diagram the corresponding parameters suggest rather a "weak" Fermi paradox. Future research may reveal whether a "strong" paradox holds in some part of the parameter space. Finally, it is argued that the value of N is not bound by N=1 from below, contrary to what is usually assumed, but it may have a statistical interpretation.
description: A few typos corrected, matches published version
Shear transport far from equilibrium via holography
Creators: name: Wondrak, Michael F.
name: Kaminski, Matthias
name: Bleicher, Marcus
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: In heavy-ion collisions, the quark-gluon plasma is produced far from equilibrium. This regime is currently inaccessible by quantum chromodynamics (QCD) computations. We calculate shear transport and entropy far from equilibrium in a holographic model, defining a time-dependent ratio of shear viscosity to entropy density, $η/s$. Large deviations of up to 60% from its near-equilibrium value, $1/4π$, are found for realistic situations at the Large Hadron Collider. We predict the far-from-equilibrium time-dependence of $η/s$ to substantially affect the evolution of the QCD plasma and to impact the extraction of QCD properties from flow coefficients in heavy-ion collision data.
description: 10 pages, 4 figures
State-of-the-Art Augmented NLP Transformer models for direct and single-step retrosynthesis
Creators: name: Tetko, Igor V.
name: Karpov, Pavel
name: Van Deursen, Ruud
name: Godin, Guillaume
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: We investigated the effect of different training scenarios on predicting the (retro)synthesis of chemical compounds using a text-like representation of chemical reactions (SMILES) and Natural Language Processing neural network Transformer architecture. We showed that data augmentation, which is a powerful method used in image processing, eliminated the effect of data memorization by neural networks, and improved their performance for the prediction of new sequences. This effect was observed when augmentation was used simultaneously for input and the target data simultaneously. The top-5 accuracy was 84.8% for the prediction of the largest fragment (thus identifying principal transformation for classical retro-synthesis) for the USPTO-50k test dataset and was achieved by a combination of SMILES augmentation and a beam search algorithm. The same approach provided significantly better results for the prediction of direct reactions from the single-step USPTO-MIT test set. Our model achieved 90.6% top-1 and 96.1% top-5 accuracy for its challenging mixed set and 97% top-5 accuracy for the USPTO-MIT separated set. It also significantly improved results for USPTO-full set single-step retrosynthesis for both top-1 and top-10 accuracies. The appearance frequency of the most abundantly generated SMILES was well correlated with the prediction outcome and can be used as a measure of the quality of reaction prediction.
Phase behaviour of charged colloidal sphere dispersions with added polymer chains
Creators: name: Fortini, Andrea
name: Dijkstra, Marjolein
name: Tuinier, Remco
Publisher: name: arXiv
Year: 2005
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We study the stability of mixtures of highly screened repulsive charged spheres and non-adsorbing ideal polymer chains in a common solvent using free volume theory. The effective interaction between charged colloids in an aqueous salt solution is described by a screened-Coulomb pair potential, which supplements the pure hard-sphere interaction. The ideal polymer chains are treated as spheres that are excluded from the colloids by a hard-core interaction, whereas the interaction between two ideal chains is set to zero. In addition, we investigate the phase behaviour of charged colloid-polymer mixtures in computer simulations, using the two-body (Asakura-Oosawa pair potential) approximation to the effective one-component Hamiltonian of the charged colloids. Both our results obtained from simulations and from free volume theory show similar trends. We find that the screened-Coulomb repulsion counteracts the effect of the effective polymer-mediated attraction. For mixtures of small polymers and relatively large charged colloidal spheres, the fluid-crystal transition shifts to significantly larger polymer concentrations with increasing range of the screened-Coulomb repulsion. For relatively large polymers, the effect of the screened-Coulomb repulsion is weaker. The resulting fluid-fluid binodal is only slightly shifted towards larger polymer concentrations upon increasing the range of the screened-Coulomb repulsion. In conclusion, our results show that the miscibility of dispersions containing charged colloids and neutral non-adsorbing polymers increases, upon increasing the range of the screened-Coulomb repulsion, or upon lowering the salt concentration, especially when the polymers are small compared to the colloids.
description: 25 pages,13 figures, accepted for publication on J.Phys.:Condens. Matter
Evaluation of addition ABS and EPDM effect on the mechanical properties of ternary polymer blends
Creators: name: Oleiwi, Jawad K.
Publisher: name: figshare
Year: 2020
Subjects: subject: 90301 Biomaterials
subject: FOS: Medical engineering
subject: 91202 Composite and Hybrid Materials
subject: FOS: Materials engineering
subject: 91299 Materials Engineering not elsewhere classified

description: Polymer blends are capable of providing materials with extended useful properties beyond the range that can beobtained from single polymer. Blends of polystyrene (PS) and polypropylene (PP) with adding acrylonitrile-butadiene-styrene (ABS) or ethylene propylene diene monomer (EPDM) are prepared in different ratios by melt blending technique which was carried out using a double screw extruder. The tensile, flexural, impact and hardness tests of all the prepared samples were study. The results from this work show that the elongation property and impact properties for blend system increase with increase PP content in polymer blend of (PS:PP), also increase value of these properties with increase the ratio of adding (ABSor EPDM) for polymer blend (PS:5%PP).The highest values of impact strength was (10.68Kj/m2) for ternary polymers blend (90%PS:5%PP:5%EPDM) and the high values of fracture toughness (6.125MPa√m ) for ternaty polymer blend(90%PS:5%PP:5«S).
Frequency of Planets in Binaries
Creators: name: Bonavita, Mariangela
name: Desidera, Silvano
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The frequency of planets in binaries is an important issue in the field of extrasolar planet studies because of its relevance in the estimation of the global planet population of our galaxy and the clues it can give to our understanding of planet formation and evolution. Multiple stars have often been excluded from exoplanet searches, especially those performed using the radial velocity technique, due to the technical challenges posed by such targets. As a consequence and despite recent efforts, our knowledge of the frequency of planets in multiple stellar systems is still rather incomplete. On the other hand, the lack of knowledge about the binarity at the time of the compilation of the target samples means that our estimate of the planet frequency around single stars could be tainted by the presence of unknown binaries, especially if these objects have a different behavior in terms of planet occurrence. In a previous work we investigated the binarity of the objects included in the Uniform Detectability sample defined by Fisher and Valenti (2005), showing how more than 20% of their targets were, in fact, not single stars. Here, we present an update of this census, made possible mainly by the information now available thanks to the second Gaia Data Release. The new binary sample includes a total of 313 systems, of which 114 were added through this work. We were also able to significantly improve the estimates of masses and orbital parameters for most of the pairs in the original list, especially those at close separations. A few new systems with white dwarf companions were also identified. The results of the new analysis are in good agreement with the findings of our previous work, confirming the lack of difference in the overall planet frequency between binaries and single stars but suggesting a decrease in the planet frequency for very close pairs.}
description: 25 pages, 5 figures