cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Atomic and Electronic Structures of Unreconstructed Polar MgO(111) Thin Film on Ag(111)
Creators: name: Kiguchi, Manabu
name: Entani, Shiro
name: Saiki, Koichiro
name: Goto, Takayuki
name: Koma, Atsushi
Publisher: name: arXiv
Year: 2003
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Atomic and electronic structures of a polar surface of MgO formed on Ag(111) was investigated by using reflection high energy electron diffraction (RHEED), Auger electron spectroscopy, electron energy loss spectroscopy (EELS), and ultraviolet photoemission spectroscopy (UPS). A rather flat unreconstructed polar MgO(111) 1$\times$1 surface could be grown by alternate adsorption of Mg and O$_{2}$ on Ag(111). The stability of the MgO(111) surface was discussed in terms of interaction between Ag and Mg atoms at the interface, and charge state of the surface atoms. EELS of this surface did not show a band gap region, and finite density of states appeared at the Fermi level in UPS. These results suggest that a polar MgO(111) surface was not an insulating surface but a semiconducting or metallic surface.
description: 6 figures, to be published in Phys. Rev. B
title: Exploring the Schooling Experience of Disengaged Girls Aged 15-16 Years
Creators: name: Laurent, Uthel
Publisher: name: The Open University
Year: 2008

description: The purpose of this study was to explore the perspectives and schooling experiences of 15-16 year-old girls judged by their teachers to be disengaged. This research, which was based on an interactionist ethnographic approach, also served as a pilot for future research on disengagement. A sample of three teachers and five students participated in individual interviews, which were recorded and transcribed. The narrative-based thematic analysis yielded five main themes which reflected various aspects of the lived experiences of the girls. The findings revealed that as students sought to create their sense of self they seemed preoccupied with certain interests which appeared to be more of a priority in their lives. The corollary was that school, though recognised for its instrumental value, appeared to be less relevant to them. As such, students showed signs of coping with their circumstances by engaging in behaviours consistent with various forms of disengagement from school and learning. From an interactionist ethnographic approach, documenting the experiences of young people is crucial as their voices have great potential in shaping the future direction of educational research into school disengagement (Hammersley, 1999; Ball, 2003). In this regard, this project has great potential in paving the way for future research to illuminate the process of disengagement. Hence, the use of complementary sources of data might shed light on the structural influences and social resources that pupils may draw upon to shape their student and self identity.
Numerical solutions to Einstein's equations in a shearing-dust Universe: a code comparison
Creators: name: Adamek, Julian
name: Barrera-Hinojosa, Cristian
name: Bruni, Marco
name: Li, Baojiu
name: Macpherson, Hayley J.
name: Mertens, James B.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: A number of codes for general-relativistic simulations of cosmological structure formation have been developed in recent years. Here we demonstrate that a sample of these codes produce consistent results beyond the Newtonian regime. We simulate solutions to Einstein's equations dominated by gravitomagnetism -- a vector-type gravitational field that doesn't exist in Newtonian gravity and produces frame-dragging, the leading-order post-Newtonian effect. We calculate the coordinate-invariant effect on intersecting null geodesics by performing ray tracing in each independent code. With this observable quantity, we assess and compare each code's ability to compute relativistic effects.
description: 14 pages, 5 figures, accepted to CQG
Agrilus opimus Kerremans 1897
Creators: name: Curletti, Gianfranco
name: Migliore, Letizia
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Buprestidae
Agrilus
Agrilus opimus

description: Agrilus opimus Kerremans, 1897
 Agrilus opimus Kerremans, 1897: 98.
 Material examinado: BRASIL, Paraná, Curitiba, 1 ex., XII.1938 Claretianos leg., Cobos det. 1953.
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
Diffuse interface approach to brittle fracture
Creators: name: Marconi, V. I.
name: Jagla, E. A.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present a continuum model for the propagation of cracks and fractures in brittle materials. The components of the strain tensor $ε$ are the fundamental variables. The evolution equations are based on a free energy that reduces to that of linear elasticity for small $ε$, and accounts for cracks through energy saturation at large values of $ε$. We regularize the model by including terms dependent on gradients of $ε$ in the free energy. No additional fields others than the strain tensor $ε$ are introduced, and then the whole dynamics is perfectly defined. We validate the model in controlled cases, and present a couple of non trivial applications.
description: Version to appear in PRE, Vol. 71, February, 14 pages, 11 figures
Agrilus otiosus Say 1833
Creators: name: Curletti, Gianfranco
name: Migliore, Letizia
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Buprestidae
Agrilus
Agrilus otiosus

description: Agrilus otiosus Say, 1833
 Agrilus otiosus Say, 1833: 68.
 Material examinado: BRASIL, Sertão da Diamantina (Fazenda das Melancias), 1 ex.
 Notas: Se trata quase certamente de um error de determinação já que a espécie é Neartica.
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
Public Credit Guarantees and Access to Finance
Creators: name: Gozzi, Juan Carlos
name: Schmukler, Sergio
name: Gozzi, Juan Carlos
name: Schmukler, Sergio
Publisher: name: Unknown
Year: 2016
Subjects: subject: Financial Economics
subject: credit guarantees
subject: public guarantees
subject: SME financing
subject: access to finance
subject: public risk
subject: absorption

description: Public credit guarantee schemes have gained popularity as a tool to try to increase access to credit for firms perceived to be financially constrained, typically small and medium-sized enterprises. This paper discusses the potential relevance of these schemes by providing a brief overview of their use around the world and reviewing some important design features. The paper also presents a brief conceptual discussion of the role of public credit guarantees in increasing access to credit and the rationale for government intervention. Public credit guarantee schemes can constitute useful mechanisms for increasing access to finance for certain groups of borrowers, but their success and financial sustainability hinge on proper design. Moreover, rigorous evidence on the impact of these schemes is still scarce. More in-depth evaluations that jointly take into account financial sustainability and (financial and economic) additionality are needed, as well as an assessment of credit guarantees against alternative policy instruments.
National Happiness and Genetic Distance: A Cautious Exploration
Creators: name: Proto, Eugenio
name: Oswald, Andrew J.
name: Proto, Eugenio
name: Oswald, Andrew J.
Publisher: name: Unknown
Year: 2016
Subjects: subject: Financial Economics
subject: International Development
subject: Well-being
subject: international
subject: happiness
subject: genes
subject: 5-HTT
subject: countries

description: This paper studies a famous unsolved puzzle in quantitative social science. Why do some nations report such high levels of mental well-being? Denmark, for instance, regularly tops the league table of rich countries’ happiness; Britain and the US enter further down; some nations do unexpectedly poorly. The explanation for the longobserved ranking -- one that holds after adjustment for GDP and other socioeconomic variables -- is currently unknown. Using data on 131 countries, the paper cautiously explores a new approach. It documents three forms of evidence consistent with the hypothesis that some nations may have a genetic advantage in well-being.
Ionization Mechanisms in Jet-Dominated Seyferts: A Detailed Case Study
Creators: name: Rosario, D. J.
name: Whittle, M.
name: Silverman, J. D.
name: Wilson, A. S.
name: Nelson, C. H.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: For the past 10 years there has been an active debate over whether fast shocks play an important role in ionizing emission line regions in Seyfert galaxies. To investigate this claim, we have studied the Seyfert 2 galaxy Mkn 78, using HST UV/optical images and spectroscopy. Since Mkn 78 provides the archetypal jet-driven bipolar velocity field, if shocks are important anywhere they should be important in this object. Having mapped the emission line fluxes and velocity field, we first compare the ionization conditions to standard photoionization and shock models. We find coherent variations of ionization consistent with photoionization model sequences which combine optically thick and thin gas, but are inconsistent with either autoionizing shock models or photoionization models of just optically thick gas. Furthermore, we find absolutely no link between the ionization of the gas and its kinematic state, while we do find a simple decline of ionization degree with radius. We feel this object provides the strongest case to date against the importance of shock related ionization in Seyferts.
description: 4 pages, 1 figure, to appear in the proceedings of IAU Symposium 222 "The Interplay among Black Holes, Stars and ISM in Galactic Nuclei", T. Storchi Bergmann, L.C. Ho & H.R. Schmitt, eds
Model of a gap formed by a planet with fast inward migration
Creators: name: Kanagawa, Kazuhiro D.
name: Nomura, Hideko
name: Tsukagoshi, Takashi
name: Muto, Takayuki
name: Kawabe, Ryohei
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: A planet is formed within a protoplanetary disk. Recent observations have revealed substructures such as gaps and rings, which may indicate forming planets within the disk. Due to disk--planet interaction, the planet migrates within the disk, which can affect a shape of the planet-induced gap. In this paper, we investigate effects of fast inward migration of the planet on the gap shape, by carrying out hydrodynamic simulations. We found that when the migration timescale is shorter than the timescale of the gap-opening, the orbital radius is shifted inward as compared to the radial location of the gap. We also found a scaling relation between the radial shift of the locations of the planet and the gap as a function of the ratio of the timescale of the migration and gap-opening. Our scaling relation also enables us to constrain the gas surface density and the viscosity when the gap and the planet are observed. Moreover, we also found the scaling relation between the location of the secondary gap and the aspect ratio. By combining the radial shift and the secondary gap, we may constrain the physical condition of the planet formation and how the planet evolves in the protoplanetary disk, from the observational morphology.
description: 15 pages, 15 figures, accepted for publication in The Astrophysical Journal
Biology and Behavior of the Black Soldier Fly - Phase 1
Creators: name: Fussell, Lisa Mei-Hwa
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.”
Relaxation time for the alignment between the spin of a finite-mass quark/antiquark and the thermal vorticity in relativistic heavy-ion collisions
Creators: name: Ayala, Alejandro
name: de la Cruz, David
name: Hernández, L. A.
name: Salinas, Jordi
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We study the relaxation time required for the alignment between the spin of a finite-mass quark/antiquark and the thermal vorticity, at finite temperature and baryon chemical potential, in the context of relativistic heavy-ion collisions. The relaxation time is computed as the inverse of the total reaction rate that in turn is obtained from the imaginary part of the quark/antiquark self-energy. We model the interaction between spin and thermal vorticity within the medium by means of a vertex coupling quarks and thermal gluons that, for a uniform temperature, is proportional to the global angular velocity and inversely proportional to the temperature. We use realistic estimates for the angular velocities for different collision energies and show that the effect of the quark mass is to reduce the relaxation times as compared to the massless quark case. Using these relaxation times we estimate the intrinsic quark and antiquark polarizations produced by the thermal vorticity. We conclude by pointing out that, in spite of the former being larger than the latter, it is still possible to understand recent results from the STAR Beam Energy Scan when accounting for the fact that only a portion of quarks/antiquarks come from the denser and thus thermalized region in the collision.
description: 6 pages, 7 figures. Expanded discussion, conclusions unchanged. arXiv admin note: text overlap with arXiv:1909.00274
Beam-energy and collision-system dependence of the linear and mode-coupled flow harmonics from STAR
Creators: name: Magdy, Niseem
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Recent measurements and hydrodynamic model calculations suggest that the higher-order flow coefficients $v_{4}$ and $v_{5}$ have two contributions: a linear contribution driven by the initial-state eccentricities, $\varepsilon_{n}$, and a mode-coupled contribution derived from the lower-order eccentricity coefficients $\varepsilon_{2}$ and $\varepsilon_{3}$. Measurements of these two contributions to $v_{4}$ and $v_{5}$ provide crucial insights to discern initial-state models and to constrain the temperature-dependent specific shear viscosity, $η/s$, of the plasma produced in heavy-ion collisions. In this work, we have employed the two-subevents cumulant technique to provide the first beam-energy and collision-system dependence of the linear and mode-coupled contributions to the higher-order flow harmonics. Our results are shown and discussed for several centrality intervals for U+U collisions at $\mathrm{\sqrt{s_{NN}}}$= 193 GeV, Au+Au collisions at $\mathrm{\sqrt{s_{NN}}}$=200, and 54.4 GeV and Cu+Au collisions at $\mathrm{\sqrt{s_{NN}}}$=200 GeV. The results are compared with similar studies performed by the ALICE experiment at LHC.
Agrilus pabulator Obenberger 1932
Creators: name: Curletti, Gianfranco
name: Migliore, Letizia
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Buprestidae
Agrilus
Agrilus pabulator

description: Agrilus pabulator Obenberger, 1932
 Agrilus pabulator Obenberger, 1932: 239.
 Material examinado: BRASIL, Santa Catarina, Nova Teutônia, 2 exs., XI.1942, Plaumann leg. Dirings det.; 1 ex., São Paulo, Ribeirão Pires, I.1943, Dirings leg. et det.; 1 ex., São Paulo (Cantareira) III.1940, Dirings leg. et det .
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
title: Science, Evaluation, and Morality
Creators: name: Vallance, Grant Douglas
Publisher: name: The Open University
Year: 2009

description: There is considerable dispute over the nature of the relationship between ethics and the natural sciences. This thesis argues that ethics is substantially independent of the natural sciences because the appeals to the natural sciences fail to adequately justify moral judgements about human beings. Specifically, I argue that if appeals to the natural sciences are not adequate to justify the normative assessment of living organisms, then they are not adequate to justify moral judgements about human beings. I consider the following appeals to justify the normative assessment of living organisms. These include the appeals to: (1) typicality; (2) history; (3) what is natural; (4) natural selection; (5) functions; (6) development; (7) species; and (8) the experience of pleasure and pain. I claim that these appeals are inadequate for one or more of the following reasons. One, some versions of the appeals are incompatible with the natural sciences. Two, the appeals justify implausible and counterintuitive moral judgements. Three, the appeals fail to adequately determine what should occur in contrast to what occurs. Four, there are many different appeals which justify contrary moral judgements and no objective means within the natural sciences to privilege one appeal over another. Finally, five, for some appeals there are various parameters which determine what is justified, but there are no objective means within the natural sciences to justify any particular set of parameters over and against alternatives.
How Transparency Kills Information Aggregation: Theory and Experiment
Creators: name: Hughes, Niall
name: Fehrler, Sebastian
name: Hughes, Niall
name: Fehrler, Sebastian
Publisher: name: Unknown
Year: 2014
Subjects: subject: Financial Economics
subject: Committee Decision-Making
subject: Deliberation
subject: Transparency
subject: Career Concerns
subject: Information Aggregation
subject: Experiments
subject: Voting
subject: Strategic Communication

description: We investigate the potential of transparency to influence committee decisionmaking. We present a model in which career concerned committee members receive private information of different type-dependent accuracy, deliberate and vote. We study three levels of transparency under which career concerns are predicted to affect behavior differently, and test the model’s key predictions in a laboratory experiment. The model’s predictions are largely borne out - transparency negatively affects information aggregation at the deliberation and voting stages, leading to sharply different committee error rates than under secrecy. This occurs despite subjects revealing more information under transparency than theory predicts.
title: The Effect of Self-Regulated Learning Prompts on Learners' Performance in a Simulation Learning Environment
Creators: name: Olakanmi, Eunice Eyitayo
Publisher: name: The Open University
Year: 2008

description: In this study, the effect of self-regulated learning (SRL) prompts on the academic performance of 30 key stage 3 science students learning with a computer-based simulation environment has been explored. Students were randomly assigned to either self-regulate learning (SRL) prompted or non-self-regulated learning (non-SRL) prompted condition. Mixed methods including pre and post self-regulatory skills questionnaires (SRSQ), pre and post reaction rates knowledge tests (RRKT), students’ activity sheets (SAS) and class-room observation were employed for data collection and analysis. Students in the SRL prompted group were given activity sheets which contained self-regulated learning prompts whereas students in the non-SRL prompted group received no SRL-prompts in their activity sheets. It was discovered that the incorporation of SRL prompted instructions into a computer-based simulation environment that teaches the rates of chemical reactions facilitated shift in learners’ academic performance more significantly than did the non-SRL-prompted condition. Data analysis indicated that this was associated with the presence of the SRL behavioural prompts in the activity sheets. The introduction of SRL-prompted instructions into a computer-based simulation learning environment assisted students to know what to do at the appropriate time during the given task. For science educational designers, this study establishes the platform to understand the application of SRL-prompted instructions to the teaching of different topics in a computer-based learning environment with a view to improving students’ academic performance.
Agrilus pilosovittatus Saunders 1873
Creators: name: Curletti, Gianfranco
name: Migliore, Letizia
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Buprestidae
Agrilus
Agrilus pilosovittatus

description: Agrilus pilosovittatus Saunders, 1873
 Agrilus pilosovittatus Saunders, 1873: 515.
 Material examinado: JAPÃO, Tokyo, Niffara?, 1 ex., 17.VII.1982 N. Inahara leg. N. Inahara det.
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 pages 103-104, DOI: 10.1590/0031-1049.2014.54.08, http://zenodo.org/record/4656297
title: The Changing Representation of Gay Politicians in the UK Press
Creators: name: Smith, Donna Louise
Publisher: name: The Open University
Year: 2009

description: The changing representation of gay politicians in UK newspapers is an area which is underrepresented in political and media studies. It is an important subject because press representation of gay politicians has personal and public consequences; not only can the ‘politicians concerned have their political and personal lives negatively affected, democracy can be compromised. Indeed, gay politicians may be less inclined to speak out on gay issues and free expression may be constrained.

The thesis demonstrates:

1. How gay MPs in the UK are represented in newspapers

2. How representation has changed

3. An overarching frame of representation.

Newspaper articles are analysed and politicians and campaigners interviewed. A literature/historical review contextualises analysis, taking into account socio-political factors.

The thesis demonstrates that the press representation of gay politicians is governed by three interconnected frames:

1. The move towards recognition

According to the premise of ‘recognition,’ marginalised groups are entitled to equal rights and respect, rather than a grudging tolerance, alongside recognition of their particularity. This thesis suggests society has moved from intolerance, to tolerance, to partial recognition of homosexuality; this process has been a halting one, although it is generally unidirectional.

2. Acceptability over time (in relation to heterosexual public space)

Sexuality/sexual acts can be rated in terms of public acceptability (as in the acceptance of society) and heterosexual public space. Generally, public homosexuality has become more acceptable over the last fifty years (again, this has been a halting process), although still has some way to go to reach full acceptability.

3. Mediated personas as ‘constructed reality’

Gay politicians are represented in the media through the use of binary themes; using these themes, their personas (gradients of negative and positive) are created by and mediated through newspapers.

The third frame helps to maintain negative and stereotypical representations of gay politicians.
Spin Fluctuations and Non-Fermi-Liquid Behavior of CeNi_2Ge_2
Creators: name: Kadowaki, H.
name: Fåk, B.
name: Fukuhara, T.
name: Maezawa, K.
name: Nakajima, K.
name: Adams, M. A.
name: Raymond, S.
name: Flouquet, J.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Neutron scattering shows that non-Fermi-liquid behavior of the heavy-fermion compound CeNi_2Ge_2 is brought about by the development of low-energy spin fluctuations with an energy scale of 0.6 meV. They appear around the antiferromagnetic wave vectors $({1/2} {1/2} 0)$ and $(0 0 {3/4})$ at low temperatures, and coexist with high-energy spin fluctuations with an energy scale of 4 meV and a modulation vector $(0.23, 0.23, {1/2})$. This unusual energy dependent structure of $\text{Im} χ(\bm{Q}, E)$ in $\bm{Q}$ space suggests that quasiparticle bands are important.
description: 4 pages, 4 figures
Price Comparison website
Creators: name: Ronayne, David
name: Ronayne, David
Publisher: name: Unknown
Year: 2018
Subjects: subject: Financial Economics
subject: online markets
subject: price comparison websites
subject: price competition
subject: price dispersion

description: The large and growing industry of price comparison websites (PCWs) or ‘web aggregators’ is poised to benefit consumers by increasing competitive pricing pressure on firms by acquainting shoppers with more prices. However, these sites also charge firms for sales, which feeds back to raise prices. I investigate the impact of introducing PCWs to a market for a homogeneous good. I find that introducing a single PCW increases prices for all consumers, both those who use the sites, and those who do not. Under competing PCWs, prices tend to rise with the number of PCWs. I also conduct various extensions and use the analysis to discuss relevant industry practices and policies.
Can we detect the stellar differential rotation of WASP-7 through theRossiter-McLaughlin observations?
Creators: name: Serrano, Luisa Maria
name: Oshagh, M.
name: Cegla, H. M.
name: Barros, S. C. C.
name: Santos, N. C.
name: Faria, J. P.
name: Akinsansanmi, Babatunde
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 Rossiter-McLaughlin (RM) effect is the radial velocity signal generated when an object transits a rotating star. Stars rotate differentially and this affects the shape and amplitude of this signal, on a level that can no longer be ignored with precise spectrographs. Highly misaligned planets provide a unique opportunity to probe stellar differential rotation via the RM effect, as they cross several stellar latitudes. In this sense, WASP-7, and its hot Jupiter with a projected misalignment of \sim 90°, is one of the most promising targets. The aim of this work is to understand if the stellar differential rotation is measurable through the RM signal for systems with a geometry similar to WASP-7. In this sense, we use a modified version of SOAP3.0 to explore the main hurdles that prevented the precise determination of the differential rotation of WASP-7. We also investigate whether the adoption of the next generation spectrographs, like ESPRESSO, would solve these issues. Additionally, we assess how instrumental and stellar noise influence this effect and the derived geometry of the system. We found that, for WASP-7, the white noise represents an important hurdle in the detection of the stellar differential rotation, and that a precision of at least 2m/s or better is essential.
description: 12 pages plus appendix, 9 figures
title: Exploring the Link Between Player Involvement and Learning Within Seventh Generation Video Games
Creators: name: Iacovides, Ioanna
Publisher: name: The Open University
Year: 2009

description: Digital games are becoming increasingly popular with the latest generation of consoles introducing games to an even wider audience. Academic interest in the educational potential of video games is also growing and seems to stem from the fact that they are considered motivating. However, while there is some research on what makes games engaging, there is still a need to further our understanding of the link between player involvement and learning. This project aims to explore the informal learning that occurs within games, to identify the experience of player involvement, and to investigate the relationship between the two. The Digital Game Experience Model (DGEM), with its metaphor of incorporation (Calleja, 2007), is introduced as a framework that can help address these issues and to provide researchers in the area with a common terminology. A case study methodology was adopted, while the method itself consisted of an observation of game-play and a post-play cued interview in which a recording of the game-play was reviewed. A summarised version of each case-study, with an example of a critical instance or theme, is presented in order to illustrate how the DGEM was used to address the research questions. The findings indicate a very close relationship between the learning that occurs within the game and the involvement experienced by the player, suggesting that a certain amount of learning is required before the player can experience deeper levels of involvement. However, further research is needed before any conclusive claims can be made and to establish whether the metaphor of incorporation applies to all types of games.
Hadronic weak decays of the charmed baryon $Ω_c$
Creators: name: Hu, Shiyong
name: Meng, Guanbao
name: Xu, Fanrong
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Two-body hadronic weak decays of the charmed baryon $Ω_c$, including Cabibbo-favored (CF), singly Cabibbo-suppressed (SCS) and doubly Cabibbo-suppressed (DCS) modes, are studied systematically in this work. To estimate nonfactorizable contributions, we work in the pole model for the $P$-wave amplitudes and current algebra for the $S$-wave amplitudes. Among all the channels decaying into a baryon octet and a pseudoscalar meson, $Ω_c\to Ξ^0\overline{K}^0$ is the only allowed CF mode. The predicted branching fraction of order $3.8\%$ and large and positive decay asymmetry of order $0.50$ indicate that a measurement of this mode in the near future is promising. Proceeding through purely nonfactorizable contributions, the SCS mode $Ω_c\toΛ^0\overline{K}^0$ and DCS mode $Ω_c\toΛ^0 η$ are predicted to have branching fractions as large as $0.8\%$ and $0.4\%$, respectively. The two DCS modes $Ω_c\toΣ^0η$ and $Ω_c\toΛ^0π^0$ are suggested to serve as new physics searching channels for their vanishing SM background.
description: V1: 20 pages, 1 figure, 5 tables. arXiv admin note: text overlap with arXiv:2001.04553, arXiv:1910.13626; V2: version accepted by PRD, 24 pages, references added, footnotes added
VOTING IN LEGISLATIVE ELECTIONS UNDER PLURALITY RULE
Creators: name: Hughes, Niall
name: Hughes, Niall
Publisher: name: Unknown
Year: 2014
Subjects: subject: Financial Economics
subject: Strategic Voting
subject: Legislative Elections
subject: Duverger's Law
subject: Plurality Rule
subject: Polarization
subject: Poisson Games

description: Conventional models of single district plurality elections show that with three parties anything can happen - extreme policies can win regardless of voter preferences. I show that when when single district elections are used to fill a legislature we get back to a world where the median voter matters. An extreme policy will generally only come about if it is preferred by the median voter in a majority of districts, while the mere existence of a centrist party can lead to moderate outcomes even if the party itself wins few seats. Furthermore, I show that while standard single district elections always have misaligned voting i.e. some voters do not vote for their preferred choice, equilibria of the legislative election exist with no misaligned voting in any district. Finally, I show that when parties are impatient, a fixed rule on how legislative bargaining occurs will lead to more coalition governments, while uncertainty will favour single party governments.
A transportable interrogation laser system with an instability of $\mathrm{mod}\,σ_{\rm y} = 3\times10^{-16}$
Creators: name: Häfner, Sebastian
name: Herbers, Sofia
name: Vogt, Stefan
name: Lisdat, Christian
name: Sterr, Uwe
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We present an interrogation laser system for a transportable strontium lattice clock operating at 698 nm, which is based on an ultra-low-expansion glass reference cavity. Transportability is achieved by implementing a rigid, compact, and vibration insensitive mounting of the 12 cm-long reference cavity, sustaining shocks of up to 50 g. The cavity is mounted at optimized support points that independently constrain all degrees of freedom. This mounting concept is especially beneficial for cavities with a ratio of length $L$ over diameter $D$ $L/D>1$. Generally large $L$ helps to reduce thermal noise-induced laser frequency instability while small $D$ leads to small cavity volume. The frequency instability was evaluated, reaching its thermal noise floor of $\mathrm{mod}\,σ_{\rm y} \approx 3 \times 10^{-16}$ for averaging times between 0.5 s and 10 s. The laser system was successfully operated during several field studies.
title: Title Registration: From Record to Resource
Creators: name: Moss, Victoria
Publisher: name: University of Kent
Year: 2015

description: Since public access to the register of land titles was introduced under the Land Registration Act 1988, title registration has undertaken a transformation. The opening of the register provided for a transformation to arise, changing title registration from a record of land holding into a data resource of significant economic value. As a consequence of processes of commodification, that utilise the new wealth and property found in and on title data, it is argued that a practical and conceptual transformation has arisen. This study will examine the commodification of data and of risk that has arisen in response to the exploitation and manipulation of title data initiated by the Land Registry. The case studies in this thesis will explore the use of data derived from the register, and its integration within associated business models outside of the Registry to create revenue streams and to exploit the new property found in and on data. The thesis will explore and evidence multiple processes of the commodification of data and of risk that change conveyancing and marketing practices. Examples of the commodification of title data will be explored through an analysis of: the publication of 'Price Paid' data, the use of the title register and title data by the real estate sector and the emergence of property title fraud. This research will also explore the sale of insurance that focus on related 'risk' for chancel repair liability and property title fraud; illustrating further the transformation of title registration from record into data.
Incentives to Innovate, Compatibility and Welfare in Durable Goods Markets with Network Effects
Creators: name: Athanasopoulos, Thanos
name: Athanasopoulos, Thanos
Publisher: name: Unknown
Year: 2015
Subjects: Financial Economics

description: This article investigates Örmsíincentives to invest in R&D and how these choices relate to their current compatibility decisions regarding their future, durable network goods in the presence of forward-looking consumers. Product innovation is sequential with both an initially dominant Örm and a smaller competitor as potential innovators. FirmsíR&D e§orts become strategic complements for the current market leader when compatibility is present and network e§ects are strong, while they are strategic substitutes for both Örms for weak network externalities. A novelty of the article is that it gives an explanation to compatibility agreements that Örms with dominant market shares sign with smaller market players: sufÖciently innovative future products lead the dominant Örm to support future compatibility because the probability that it is the only innovator increases when compatibility is present, allowing this Örm to enjoy a higher expected future proÖt that outweighs its current lost revenue. An interesting theoretical result is that the smaller rival may reject to support compatibility in industries with a relatively smaller number of existing consumers. For less innovative future products, the dominant Örm rejects compatibility and there is a cuto§ in network externalities below which it invests more when incompatibility is present. Regarding welfare, I Önd that future incompatible networks increase expected consumer surplus and lead to more balanced market R&D incentives relative to the economy that mandates compatibility when network effects are weak.
Effects of Marginal Specifcations on Copula Estimation
Creators: name: Azam, Kazim
name: Azam, Kazim
Publisher: name: Unknown
Year: 2014
Subjects: subject: Financial Economics
subject: Bayesian copula
subject: discrete data
subject: order statistics
subject: semi-parametric

description: This paper studies the effect of marginal distributions on a copula, in the case of mixed discretecontinuous random variables. The existing literature has proposed various methods to deal with mixed marginals: this paper is the first to quantify their effect in a unified Bayesian setting. Using order statistics based information for the marginals, as proposed by Hoff (2007), we find that in small samples the bias and mean square error are at least half in size as compared to those of empirical or misspecified marginal distributions. The difference in the bias and mean square error enlarges with increasing sample size, especially for low count discrete variables. We employ the order statistics method on firm-level patents data, containing both discrete and continuous random variables, and consistently estimate their correlation.
Auto-reverse nuclear migration in bipolar mammalian cells on micropatterned surfaces
Creators: name: Szabo, B.
name: Kornyei, Zs.
name: Zach, J.
name: Selmeczi, D.
name: Csucs, G.
name: Czirok, A.
name: Vicsek, T.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Cell Behavior (q-bio.CB)
subject: FOS: Biological sciences

description: A novel assay based on micropatterning and time-lapse microscopy has been developed for the study of nuclear migration dynamics in cultured mammalian cells. When cultured on 10-20 um wide adhesive stripes, the motility of C6 glioma and primary mouse fibroblast cells is diminished. Nevertheless, nuclei perform an unexpected auto-reverse motion: when a migrating nucleus approaches the leading edge, it decelerates, changes the direction of motion and accelerates to move toward the other end of the elongated cell. During this process cells show signs of polarization closely following the direction of nuclear movement. The observed nuclear movement requires a functioning microtubular system, as revealed by experiments disrupting the main cytoskeletal components with specific drugs. On the basis of our results we argue that auto-reverse nuclear migration is due to forces determined by the interplay of microtubule dynamics and the changing position of the microtubule organizing center as the nucleus reaches the leading edge. Our assay recapitulates specific features of nuclear migration (cell polarization, oscillatory nuclear movement), while allows the systematic study of a large number of individual cells. In particular, our experiments yielded the first direct evidence of reversive nuclear motion in mammalian cells, induced by attachment constraints.
description: Figures and supplemental videos: http://esr.elte.hu/nuclearmotility
BatchLayout: A Batch-Parallel Force-Directed Graph Layout Algorithm in Shared Memory
Creators: name: Rahman, Md. Khaledur
name: Sujon, Majedul Haque
name: Azad, Ariful
Publisher: name: arXiv
Year: 2020
Subjects: subject: Social and Information Networks (cs.SI)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: Force-directed algorithms are widely used to generate aesthetically pleasing layouts of graphs or networks arisen in many scientific disciplines. To visualize large-scale graphs, several parallel algorithms have been discussed in the literature. However, existing parallel algorithms do not utilize memory hierarchy efficiently and often offer limited parallelism. This paper addresses these limitations with BatchLayout, an algorithm that groups vertices into minibatches and processes them in parallel. BatchLayout also employs cache blocking techniques to utilize memory hierarchy efficiently. More parallelism and improved memory accesses coupled with force approximating techniques, better initialization, and optimized learning rate make BatchLayout significantly faster than other state-of-the-art algorithms such as ForceAtlas2 and OpenOrd. The visualization quality of layouts from BatchLayout is comparable or better than similar visualization tools. All of our source code, links to datasets, results and log files are available at https://github.com/khaled-rahman/BatchLayout.
description: Accepted for publication in PacificVis 2020
Dependence Analysis between Foreign Exchange Rates: A Semi-Parametric Copula Approach
Creators: name: Azam, Kazim
name: Azam, Kazim
Publisher: name: Unknown
Year: 2014
Subjects: subject: Financial Economics
subject: Copula
subject: exchange rates
subject: semi-parametric
subject: time series

description: Not only currencies are assets in investor’s portfolio, central banks use them for implementing economic policies. This implies existence of some type of dependence pattern among the currencies. We investigate such patterns among daily Deutsche Mark (DM) (Euro later), UK Sterling (GBP) and the Japanese Yen (JPY) exchange rate, all considered against the US Dollar during various economic conditions. To overcome the short-comings of misspecification, normality and linear dependence for such time series, a flexible semi-parametric copula methodology is adopted where the marginals are non-parametric but the copula is parametrically specified. Dependence is estimated both as a constant and time-varying measure. During the Pre-Euro period, we find slightly more dependence when both DM (Euro)/USD and GBP/USD jointly appreciate as compared to joint depreciation, especially in the late 90s. Such results are reversed for GBP/USD and JPY/USD in the early 90s. Post-Euro, DM (Euro)/USD and GBP/USD exhibit stronger dependence when they jointly appreciate, which could indicate preference for price-stability in EU zone. Whereas the dependence of JPY/USD with both DM (Euro)/USD and GBP/USD is stronger when they jointly depreciate, this could imply preference for export competitiveness among the countries. In the beginning of Recent-Crisis period, DM (EURO)/USD and GBP/USD show more dependence when they jointly depreciate, but later we see the similar tendency for these currencies to be related more when they jointly appreciate. Such measures of asymmetric dependence among the currencies provide vital insight into Central banks preferences and investors portfolio balancing.
Supersymmetric quantum mechanics requires $g=2$ for vector bosons
Creators: name: Junker, Georg
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 03.65.Pm - Relativistic wave equations, 11.30.Pb - Supersymmetry, 13.40.Em - $g$ factor

description: Relativistic arbitrary spin Hamiltonians are shown to obey the algebraic structure of supersymmetric quantum system if their odd and even parts commute. This condition is identical to that required for the exactness of the Foldy-Wouthuysen transformation. Applied to a massive charged spin-$1$ particle in a constant magnetic field, supersymmetric quantum mechanics necessarily requires a gyromagnetic factor $g=2$.
description: 3 pages
Unusual spectral categories
Creators: name: Paniagua, María José Arroyo
name: Facchini, Alberto
name: Gran, Marino
name: Janelidze, George
Publisher: name: arXiv
Year: 2020
Subjects: subject: Category Theory (math.CT)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 18A20, 18A40, 18B30, 18G05

description: The paper is devoted to a kind of `very non-abelian' spectral categories. Under strong conditions on a category $\mathcal{X}$, we prove, among other things, that, for a given faithful localization $\mathcal{C}\to\mathcal{X}$, we have canonical equivalences $\mathrm{Spec}(\mathcal{C})\sim\mathcal{X}\sim(\mathrm{Category\,\,of\,\,injective\,\,objects\,\,in}\,\, \mathcal{C})$, and that $\mathcal{C}$ has natural injective envelopes.
description: 10 pages
Contact Order Dependent Protein Folding Rates: Kinetic Consequences of a Cooperative Interplay Between Favorable Nonlocal Interactions and Local Conformational Preferences
Creators: name: Kaya, Huseyin
name: Chan, Hue Sun
Publisher: name: arXiv
Year: 2003
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Quantitative Biology (q-bio)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: Physical mechanisms underlying the empirical correlation between relative contact order (CO) and folding rate among naturally-occurring small single-domain proteins are investigated by evaluating postulated interaction schemes for a set of three-dimensional 27mer lattice protein models with 97 different CO values. Many-body interactions are constructed such that contact energies become more favorable when short chain segments sequentially adjacent to the contacting residues adopt native-like conformations. At a given interaction strength, this scheme leads to folding rates that are logarithmically well correlated with CO (correlation coefficient $r=0.914$) and span more than 2.5 orders of magnitude, whereas folding rates of the corresponding Gō models with additive contact energies have much less logarithmic correlation with CO and span only approximately one order of magnitude. The present protein chain models also exhibit calorimetric cooperativity and linear chevron plots similar to that observed experimentally for proteins with apparent simple two-state folding/unfolding kinetics. Thus, our findings suggest that CO-dependent folding rates of real proteins may arise partly from a significant positive coupling between nonlocal contact favorabilities and local conformational preferences.
description: 23 pages, 4 postscript figures (will appear on Proteins)