cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Design of Output EMI Filter to Mitigate the EMI Issues in a SiC Inverter Fed AC Motor Drive-Slides
Creators: Manish Kumar
Publisher: name: IEEE
Year: 2023

TEC Webinar Slides
Abstract: The SiC inverter switching at high frequencies introduces increased common-mode (CM) and differential-mode (DM) electromagnetic interference (EMI) issues in applications like aerospace,  electric vehicles, etc. These EMI issues are commonly addressed by employing EMI filters. The attenuation performance of the magnetic components in an EMI filter degrades at high frequencies and results in increased volume and poor attenuation. Thus, the EMI filter's design must be improved for enhanced performance and minimized volume. This webinar will present the different EMI filter configurations with modified design topologies/procedures for SiC inverter-fed motor drives. The impact of the high switching frequency operation on the motor drive and EMI will also be discussed
An investigation into south campus stormwater catchment and filtration technologies
Creators: name: Qiu, Jing Ming
name: Lu, Jing Wen
name: Yan, Lichen
Publisher: name: The University of British Columbia
Year: 2014

description: UBC Farm currently uses Metro Vancouver as a source of water for irrigation. Statistics shows that water consumption during the peak season from June to September is almost four times of that during off-peak season, and such a big difference creates a heavy cost to the Farm. Due to the coastal climate of Vancouver, the peak season for irrigation is in drought condition whereas precipitation during off-peak season is more than enough for irrigation purpose in off-peak and even peak season. Thus, in order to save water consumption and be environmentally friendly, three sustainable stormwater catchment systems were proposed and triple bottom line assessment was conducted to evaluate these systems with economic, social, and ecological factors. These three systems include pond, rain garden and Rooftop Water Harvesting System, which are all designed to catch precipitation and stormwater runoff at UBC South Campus and thus to provide filtration and conserve the water for irrigation during peak season. The economic assessment determines which system costs less and needs less years for investment payback, and the pond solution achieves the best score for its relatively lost cost and hence less years of payback. The social evaluation indicates how each system would affect the neighbourhood and the society. Rain garden has the most social benefits, but it also brings significant disturbance to the neighbourhood community. Lastly, the ecological assessment shows how each system will alter the environment and what are the benefits to the environment. In this aspect, both rain garden and water pond bring similar ecological benefits, while the third one has no noticeable benefits since it is mostly industrialized and artificial. Hence, from the overall judgement of the three aspects, the water pond solution obtains the highest overall ranking. Therefore, it is suggested to implement a water pond with a mini ecosystem in UBC Farm for stormwater catchment and filtration, and a habitat test and additional funding are required. 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.”
Entangling two mode thermal fields through quantum erasing
Creators: name: Li, Shang-Bin
name: Xu, Jing-Bo
Publisher: name: arXiv
Year: 2004
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate a possible scheme for entangling two mode thermal fields through the quantum erasing process, in which an atom is coupled with two mode fields via the interaction governed by the two-mode two-photon Jaynes-Cummings model. The influence of phase decoherence on the entanglement of two mode fields is discussed. It is found that quantum erasing process can transfer part of entanglement between the atom and fields to two mode fields initially in the thermal states. The entanglement achieved by fields heavily depends on their initial temperature and the detuning. The entanglement of stationary state is also investigated.
description: 11 pages, 6 figures, a minor mistake is corrected
The Performance of Alternative Forecasting Methods for SETAR Models
Creators: name: Clements, Michael P.
name: Smith, Jeremy
name: Clements, Michael P.
name: Smith, Jeremy
Publisher: name: Unknown
Year: 1996
Subjects: subject: Agricultural and Food Policy
subject: Production Economics
subject: Research Methods/ Statistical Methods
subject: Threshold model
subject: forecasting
subject: simulations

description: We compare a number of methods that have been proposed in the literature for obtaining h-step ahead minimum mean square error forecasts for SETAR models. These forecasts are compared to those from an AR model. The comparison of forecasting methods is made using Monte Carlo simulation. The Monte Carlo method of calculating SETAR forecasts is generally at least as good as that of the other methods we consider. An exception is when the disturbances in the SETAR model come from a highly asymmetric distribution, when a Bootstrap method is to be preferred. An empirical application calculates multi-period forecasts from a SETAR model of US GNP using a number of the forecasting methods. We find that whether there are improvements in forecast performance relative to a linear AR model depends on the historical epoch we select, and whether forecasts are evaluated conditional on the regime the process was in at the time the forecast was made.
Real-time dynamics of proton decay
Creators: name: Grigoriev, Dmitri
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: Substituting Skyrmion for nucleon, one can potentially see -- in real time -- how the monopole is catalysing the proton (or neutron) decay, and even obtain a plausible estimate for catalysis cross-section. Here we discuss the key aspects of a practical implementation of such approach and demonstrate how one can overcome the main technical problems: Gauss constraint violation and reflections at the boundaries.
description: LaTeX [PoS.cls included], 6 pages, 1 figure, talk presented at Lattice 2005 (Topology and Confinement), Trinity College, Dublin, July 25-30, 2005
Additional file 1 of Self-rated health and objective health status as predictors of all-cause mortality among older people: a prospective study with a 5-, 10-, and 27-year follow-up
Creators: name: Wuorela, Maarit
name: Lavonius, Sirkku
name: Salminen, Marika
name: Vahlberg, Tero
name: Viitanen, Matti
name: Viikari, Laura
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Cancer
subject: Science Policy

description: Additional file 1. Variables used in the assessment of objective health status
Vermeer and the Camera Obscura
Creators: name: Hothe, Delight Hall
name: Keck, Andrew S
Publisher: name: American University (Washington, D.C.)
Year: 2023
Subjects: classificationCode: 3601
subject: Art history, theory and criticism

description: Research paper submitted to American University in partial fulfillment of the Degree of Master of Arts; approved as non-thesis option
The Real Exchange Rate Misalignment in the Five Central European Countries
Creators: name: Frait, Jan
name: Komarek, Lubos
name: Melecky, Martin
name: Frait, Jan
name: Komarek, Lubos
name: Melecky, Martin
Publisher: name: Unknown
Year: 2006
Subjects: subject: Agricultural and Food Policy
subject: International Relations/Trade
subject: Exchange rate misalignments
subject: equilibrium exchange rates
subject: ERM II
subject: Central European Countries

description: The paper focuses on the developments of real exchange rates and their fundamental determinants in the five new EU Member States (Czech Republic, Hungary, Poland, Slovakia, and Slovenia). First, the approaches that can be used for estimation of equilibrium real exchange rates are briefly discussed. Then, we use well-established determinants of real exchange rates associated with the behavioral equilibrium exchange rate (BEER) approach to assess misalignments of the real exchange rates for the five new EU Member States. The estimates of the equilibrium exchange rates are obtained by means of both purely statistical approaches (HP filter, band-pass filter) and applying several multivariate estimation methods to our reduced-form BEER model. The results obtained indicate that the tendency towards appreciation of real exchange rates in the economies under consideration have been driven primarily by fundamental determinants
Light ellipticity and polarization angle dependence of magnetic resonances in rubidium vapor using amplitude-modulated light: Theoretical and experimental investigations
Creators: name: Grewal, Raghwinder Singh
name: Pati, Gour
name: Tripathi, Renu
Publisher: name: arXiv
Year: 2020
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We report on experimental and theoretical investigations of the polarization dependence of magnetic resonance generated by synchronous optical pumping. Magnetic resonances with narrow linewidth are generated experimentally using a rubidium vapor cell with octade-cyltrichlorosilane (OTS) antirelaxation coating on inner walls. We studied the effect of light ellipticity on the amplitudes and widths of magnetic resonances by matching the light modulation frequency with 2 Ω_L (alignment) and Ω_L(orientation) in a Bell-Bloom interaction geometry, where Ω_L corresponds to the Larmor frequency. Both 2 Ω_L and \OmegaL resonance amplitudes showed a strong dependence on the light ellipticity. In addition, we showed that the duty cycle of light modulation changes the slope of amplitude variations in 2Ω_L and Ω_L resonances with light ellipticity. As a potential application, we showed that the difference between 2Ω_Land Ω_Lresonance amplitudes can be used for in situ measurement of light ellipticity. We also studied the dependence of 2Ω_L and Ω_L resonance amplitudes on the polarization angle of linearly polarized light. These amplitudes oscillate periodically with the polarization angle. We found this oscillatory behavior to be sensitive to the tilt in magnetic field direction from the polarization plane. Such a property could be used to realize a vector magnetometer. A density matrix based theoretical model is developed to simulate the magnetic resonance spectrum for different light polarizations. Our theoretical model accurately reproduces the above mentioned experimental observations.
A model for electromagnetic extraction of rotational energy and formation of accretion-powered jets in radio galaxies
Creators: name: Hujeirat, A.
name: Blandford, R.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: A self-similar solution for the 3D axi-symmetric radiative MHD equations, which revisits the formation and acceleration of accretion-powered jets in AGNs and microquasars, is presented. The model relies primarily on electromagnetic extraction of rotational energy from the disk plasma and forming a geometrically thin super-Keplerian layer between the disk and the overlying corona. The outflowing plasma in this layer is dissipative, two-temperature, virial-hot, advective and electron-proton dominated. The innermost part of the disk in this model is turbulent-free, sub-Keplerian rotating and advective-dominated. This part ceases to radiate as a standard disk, and most of the accretion energy is converted into magnetic and kinetic energies that go into powering the jet. The corresponding luminosities of these turbulent-truncated disks are discussed.
description: 17 pages, 9 figures
Funding Higher Education and Wage Uncertainty: Income Contingent Loan versus Mortgage Loan
Creators: name: Migali, Giuseppe
name: Migali, Giuseppe
Publisher: name: Unknown
Year: 2006
Subjects: subject: Financial Economics
subject: Labor and Human Capital
subject: Risk and Uncertainty
subject: Education Choice
subject: Risk Aversion
subject: Uncertainty

description: In a world where graduate incomes are uncertain (observation of the UK graduate wages from 1993 to 2003) and the higher education is financed through governmental loan (UK Higher Education Reform 2004), we build a theoretical model to show which scheme between an income contingent loan and a mortgage loan is preferred for higher level of uncertainty. Assuming a single lifetime shock on graduate incomes, we compare the individual expected utilities under the two loan schemes, for both risk neutral and risk averse individuals. We extend the analysis for graduate people working in the public sector and private sector, to stress on the extreme difference on the level of uncertainty. To make the model more realistic, we allow for the effects of the uncertainty each year for all the individual working life, assuming that the graduate income grows following a geometric Brownian motion. In general, we find that an income contingent loan is preferred for low level of the starting wage and high uncertainty
title: Supporting high-quality science journalism and communication
title: Short policy brief
titleType: Subtitle
Creators: name: Tola, Elisabetta
name: Salandin, Tanja
Publisher: name: Zenodo
Year: 2023
Subjects: ENJOI
policy brief
co-creation
journalism
science communication
policy

description: How can policy shape great science communication, empowering citizens and various stakeholders to be informed on the latest scientific findings contributing to our daily life and economic, social, cultural and even political development? Reliable, transparent, continuous, and compelling information is the basis for creating a society engaged in scientific issues and contrasting mistrust of science. While it is reasonable to assume that the responsibility for this task belongs to journalists and communicators, who must find the most effective way of interacting with the scientific community of researchers to disseminate complex scientific issues, it is essential to create conditions that facilitate this work. This Policy Brief, thus, includes suggestions, observations and ideas shared, discussed, validated and summarised during a series of meetings.
The Inter-related Dynamics of Unemployment and Low-wage Employment
Creators: name: Stewart, Mark B.
name: Stewart, Mark B.
Publisher: name: Unknown
Year: 2005
Subjects: subject: Labor and Human Capital
subject: Research Methods/ Statistical Methods
subject: unemployment dynamics
subject: low-wage employment
subject: state dependence
subject: unobserved heterogeneity
subject: dynamic random effects models
subject: repeat unemployment

description: This paper examines the extent of state dependence in unemployment and the role played in this by intervening low-wage employment. A range of dynamic random and fixed effects estimators are compared. Low-wage employment is found to have almost as large an adverse effect as unemployment on future prospects and the difference in their effects is found to be insignificant. Evidence is presented that low-wage jobs act as the main conduit for repeat unemployment and considerably increases its probability. Obtaining a higherwage job reduces the increased risk of repeat unemployment to insignificance.
Cool carbon stars in the halo: a new survey based on 2MASS
Creators: name: Mauron, N.
name: Azzopardi, M.
name: Gigoyan, K.
name: Kendall, T. R.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the first results of a new survey for finding cool N-type carbon (C) stars in the halo of the Galaxy. Candidates were first selected in the 2MASS Second Incremental Release database with JHKs colours typical of red AGB C stars and Ks < 13, and susequently checked through slit spectroscopy. 27 new halo C stars were discovered, and a detailed study of their properties are given (distance, radial velocity, variablility, proper motion, colors etc). It is found that most probably all these stars are true luminous AGB stars, rather than C dwarfs. It is finally found that about half of these stars belong to the Sgr Stream. (this abstract was shortened)
description: 21 pages, 12 figs, accepted by Astron. & Astrophysics
COVID-19 und die Psyche: Auswirkungen der Pandemie auf die mentale Gesundheit der jungen Generationen
Creators: name: Odendahl, Ariane
name: Gänge, Madeleine
name: Raschke, Nicolas
name: Wrona, Kamil J.
Publisher: name: Netzwerk Junge Generation Deutschland-Korea
Year: 2021
Subjects: subject: 610
subject: COVID-19
subject: Mental Health

description: When discussing the impact of the COVID-19 pandemic on public health, it is important to consider not only the direct consequences, but also the indirect effects. In addition to aspects such as the Post-Covid-Syndrome (Long-Covid) or the PIMS-Syndrome (especially affecting children), there are serious effects on mental health as well. Children and adolescents tend to be the most affected. Necessary restrictions in social life have far-reaching effects on the developmental processes of young people. In addition, the COVID-19 pandemic exposes existing economic or social inequalities in our society. For example, the multi-layered demands and overburdens of the crisis on parents and guardians increase the risk of physical and emotional abuse among children and adolescents. As a result, mental and psychosomatic disorders are increasing among the younger generation. Furthermore, social inequalities are widening. Thus, young women and children from poverty-stricken families are most likely to suffer the negative consequences of the pandemic. Moreover, the social relationships of those who need them the most for their own personal development suffer. And alternative communication via social media is no substitute for „real“ interpersonal relationships. A society-wide approach is needed to reduce mental burdens and, if possible, to counteract them preventively. To achieve this, more importance has to be assigned to the mental health of young people, especially at the political level. However, in order to finally develop adequate solutions and take appropriate measures, the participation of all stakeholders in the health care system is required.
Political Budget Cycles and Fiscal Decentralization
Creators: name: Gonzalez, Paula
name: Hindriks, Jean
name: Lockwood, Ben
name: Porteiro, Nicholas
name: Gonzalez, Paula
name: Hindriks, Jean
name: Lockwood, Ben
name: Porteiro, Nicholas
Publisher: name: Unknown
Year: 2006
Subjects: Financial Economics
Political Economy

description: In this paper, we study a model à la Rogoff (1990) where politicians distort fiscal policy to signal their competency, but where fiscal policy can be centralized or decentralized. Our main focus is on how the equilibrium probability that fiscal policy is distorted in any region (the political budget cycle, PBC) differs across fiscal regimes. With centralization, there are generally two effects that change the incentive for pooling behavior and thus the probability of a PBC. One is the possibility of selective distortion: the incumbent can be re-elected with the support of just a majority of regions. The other is a cost distribution effect, which is present unless the random cost of producing the public goods is perfectly correlated across regions. Both these effects work in the same direction, with the general result that overall, the PBC probability is larger under centralization (decentralization) when the rents to office are low (high). Voter welfare under the two regimes is also compared: voters tend to be better off when the PBC probability is lower, so voters may either gain or lose from centralization. Our results are robust to a number of changes in the specification of the model.
Three-Body Recombination in Ultracold Systems: Prediction of Weakly-Bound Atomic Trimer Energies
Creators: name: Tomio, Lauro
name: Filho, Victo S.
name: Yamashita, M. T.
name: Gammal, A.
name: Frederico, T.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The three-body recombination coefficient of a trapped ultracold atomic system, together with the corresponding two-body scattering length $a$, allow us to predict the energy $E_3$ of the shallow trimer bound state, using a universal scaling function. The production of dimers in Bose-Einstein condensates, from three-body recombination processes, in the regime of short magnetic pulses near a Feshbach resonance, is also studied in line with the experimental observation.
description: To appear in Few-Body Systems
Neutrino Bilarge Mixing and Flavor Physics in the Flipped SU(5) Model
Creators: name: Huang, Chao-Shang
name: Li, Tianjun
name: Liao, Wei
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We have constructed a specific supersymmetric flipped SU(5) GUT model in which bilarge neutrino mixing is incorporated. Because the up-type and down-type quarks in the model are flipped in the representations ten and five with respect to the usual SU(5), the radiatively generated flavor mixing in squark mass matrices due to the large neutrino mixing has a pattern different from those in the conventional SU(5) and SO(10) supersymmetric GUTs. This leads to phenomenological consequences quite different from SU(5) or SO(10) supersymmetric GUT models. That is, it has almost no impact on B physics. On the contrary, the model has effects in top and charm physics as well as lepton physics. In particular, it gives promising prediction on the mass difference, $ΔM_D$, of the $D-{\bar D}$ mixing which for some ranges of the parameter space with large $\tanβ$ can be at the order of $10^9 ~\hbar ~s^{-1}$, one order of magnitude smaller than the experimental upper bound. In some regions of the parameter space $ΔM_D$ can saturate the present bound. For these ranges of parameter space, $t \to u,c+h^0$ can reach $10^{-5}-10^{-6}$ which would be observed at the LHC and future $γ-γ$ colliders.
description: 25 pages, 1 figure, version for publication
Historicizing Sustainable Development Goal 9 from the Global Industrial Revolution to African Strategies of Industrialization
Creators: name: Gutmann, Martin
name: Adesina, Olutayo
Publisher: name: Zenodo
Year: 2021

description: This is a draft of a chapter that has been accepted for publication by Oxford University Press in the forthcoming book "Before the SDGs" edited by Martin Gutmann and Daniel Gorman due for publication in 2021
description: + ID der Publikation: hslu_82579 + Art des Beitrages: Working Paper + Sprache: Englisch + Letzte Aktualisierung: 2021-03-23 11:29:37
An investigation into the use of cob and/or straw bale construction in non-residential buildings
Creators: name: Kutarna, Matthew
name: Li, Kevin
name: Radebe, Ntokozo
Publisher: name: The University of British Columbia
Year: 2014

description: The University of British Columbia (UBC) Farm is planning on building a new Farm Centre to welcome guests and educate visitors. As part of this objective, the UBC Farm wishes to investigate straw-bale and cob as potential construction materials. With a major focus on the economic and regulatory impacts, this paper examines the effects of these nontraditional materials. This analysis take the form of a triple-bottom line assessment; linking the economic, social and environmental impacts of the proposed materials. Two case studies were used to provide a basis for the analysis; both non-residential buildings of a similar size to the proposed UBC Farm Centre. Additionally, primary and secondary research was conducted to quantify the findings. Interviews with industry experts were used, as well as a thorough examination of academic research. This analysis shows that while straw-bale and cob offer significant economic, social and environmental advantages, these are conditional on specific criteria. Regulatory and economic concerns suggest that neither straw-bale nor cob should be used as a load-bearing component. A timber-frame structure with traditional protective wall-siding is recommended (certain plasters could be used); using the straw-bale as the main wall material and cob as a coating on either side. This will allow the UBC Farm to take advantage of the benefits of these proposed materials while minimizing any potential for regulatory issues. 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.”
A Sovereign Debt Model with Trade Credit and Reserves
Creators: name: Kohlscheen, E.
name: O'Connell, S. A.
name: Kohlscheen, E.
name: O'Connell, S. A.
Publisher: name: Unknown
Year: 2006
Subjects: Agricultural and Food Policy
Financial Economics

description: This paper analyzes sovereign debt in an economy in which the availability of short-term trade credit reduces international trade transaction costs. The model highlights the distinction between gross and net international reserve positions. Borrowed reserves provide net wealth and liquidity services during a negotiation, as long as they are not fully attachable by creditors. Moreover, reserves strengthen the bargaining position of a country by shielding it from a cut-off from short-term trade credits thereby diminishing its degree of impatience to conclude a negotiation. We show that competitive banks do lend for the accumulation of borrowed reserves, which provide partial insurance.
Additional file 4 of Effect of arsenic stress on 5-methylcytosine, photosynthetic parameters and nutrient content in arsenic hyperaccumulator Pteris cretica (L.) var. Albo-lineata
Creators: name: Zemanová, Veronika
name: Popov, Marek
name: Pavlíková, Daniela
name: Kotrba, Pavel
name: František Hnilička
name: Česká, Jana
name: Pavlík, Milan
Publisher: name: figshare
Year: 2020
Subjects: subject: Plant Biology
subject: FOS: Biological sciences

description: Additional file 4. Table S3. Linear correlation of As and 5mC with selected parameters of P. cretica var. Albo-lineata growing on low As dose – As100.
Quantum Monte Carlo Studies of Superfluid Fermi Gases
Creators: name: Chang, S. Y.
name: Carlson, J.
name: Pandharipande, V. R.
name: Schmidt, K. E.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We report results of quantum Monte Carlo calculations of the ground state of dilute Fermi gases with attractive short range two-body interactions. The strength of the interaction is varied to study different pairing regimes which are characterized by the product of the s-wave scattering length and the Fermi wave vector, $ak_F$. We report results for the ground state energy, the pairing gap $Δ$ and the quasiparticle spectrum. In the weak coupling regime, $1/ak_F < -1$, we obtain BCS superfluid and the energy gap $Δ$ is much smaller than the Fermi gas energy $E_{FG}$. When $ a > 0$, the interaction is strong enough to form bound molecules with energy $E_{mol}$. For $1/ak_F \gtrsim 0.5$ we find that weakly interacting composite bosons are formed in the superfluid gas with $Δ$ and gas energy per particle approaching $|E_{mol}|/2$. In this region we seem to have Bose-Einstein condensation (BEC) of molecules. The behavior of the energy and the gap in the BCS to BEC transition region, $-0.5 < 1/ak_F < 0.5$ is discussed.
description: 11 figures, 3 tables
Phase diagram of the interacting persistent spin-helix state
Creators: name: Liu, Hong
name: Liu, Weizhe Edward
name: Chesi, Stefano
name: Joynt, Robert
name: Culcer, Dimitrie
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study the phase diagram of the interacting two-dimensional electron gas (2DEG) with equal Rashba and Dresselhaus spin-orbit coupling, which for weak coupling gives rise to the well-known persistent spin-helix phase. We construct the full Hartree-Fock phase diagram using a classical Monte-Carlo method analogous to that used in Phys.Rev.B 96, 235425 (2017). For the 2DEG with only Rashba spin-orbit coupling, it was found that at intermediate values of the Wigner-Seitz radius rs the system is characterized by a single Fermi surface with an out-of-plane spin polarization, while at slightly larger values of rs it undergoes a transition to a state with a shifted Fermi surface and an in-plane spin polarization. The various phase transitions are first-order, and this shows up in discontinuities in the conductivity and the appearance of anisotropic resistance in the in-plane polarized phase. In this work, we show that the out-of-plane spin-polarized region shrinks as the strength of the Dresselhaus spin-orbit interaction increases, and entirely vanishes when the Rashba and Dresselhaus spin-orbit coupling strengths are equal. At this point, the system can be mapped onto a 2DEG without spin-orbit coupling, and this transformation reveals the existence of an in-plane spin-polarized phase with a single, displaced Fermi surface beyond rs > 2.01. This is confirmed by classical Monte-Carlo simulations. We discuss experimental observation and useful applications of the novel phase, as well as caveats of using the classical Monte-Carlo method.
description: 9 pages, 7 figures, 2 tables
Fractional viscoelastic models for power-law materials
Creators: name: Bonfanti, Alessandra
name: Kaplan, Jonathan Louis
name: Charras, Guillaume
name: Kabla, Alexandre J
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Biological Physics (physics.bio-ph)
subject: Quantitative Methods (q-bio.QM)
subject: Tissues and Organs (q-bio.TO)
subject: FOS: Physical sciences
subject: FOS: Biological sciences
subject: 26A33

description: Soft materials often exhibit a distinctive power-law viscoelastic response arising from broad distribution of time-scales present in their complex internal structure. A promising tool to accurately describe the rheological behaviour of soft materials is fractional calculus. However, its use in the scientific community remains limited due to the unusual notation and non-trivial properties of fractional operators. This review aims to provide a clear and accessible description of fractional viscoelastic models for a broad audience, and to demonstrate the ability of these models to deliver a unified approach for the characterisation of power-law materials. The use of a consistent framework for the analysis of rheological data would help classify the empirical behaviours of soft and biological materials, and better understand their response.
description: 28 pages, 12 figures. Soft Matter (2020)
An Examination of the Reliability of Prestigious Scholarly Journals: Evidence and Implications for Decision-makers
Creators: name: Oswald, Andrew J.
name: Oswald, Andrew J.
Publisher: name: Unknown
Year: 2006
Subjects: subject: Agricultural and Food Policy
subject: Teaching/Communication/Extension/Profession
subject: Citations
subject: research productivity
subject: economics journals
subject: Research Assessment Exercise

description: In universities all over the world, hiring and promotion committees regularly hear the argument: “this is important work because it is about to appear in prestigious journal X”. Moreover, those who allocate levels of research funding, such as in the multi-billion pound Research Assessment Exercise in UK universities, often come under pressure to assess research quality in a mechanical way by using journal prestige ratings. This paper’s results suggest that such tendencies are dangerous. It uses total citations over a quarter of a century as the criterion. The paper finds that it is far better to publish the best article in an issue of a medium-quality journal like the Oxford Bulletin of Economics and Statistics than to publish the worst article (or often the worst 4 articles) in an issue of a top journal like the American Economic Review. Implications are discussed.
Scaling law of the plasma turbulence with non conservative fluxes
Creators: name: Gogoberidze, Grigol
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: It is shown that in the presence of anisotropic kinetic dissipation existence of scale invariant power law spectrum of plasma turbulence is possible. Obtained scale invariant spectrum is not associated with the constant flux of any physical quantity. Application of the model to the high frequency part of the solar wind turbulence is discussed.
description: Phys Rev E, accepted
Bayesian bandwidth estimation and semi-metric selection for a functional partial linear model with unknown error density
Creators: name: Shang, Han Lin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Methodology (stat.ME)
subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: This study examines the optimal selections of bandwidth and semi-metric for a functional partial linear model. Our proposed method begins by estimating the unknown error density using a kernel density estimator of residuals, where the regression function, consisting of parametric and nonparametric components, can be estimated by functional principal component and functional Nadayara-Watson estimators. The estimation accuracy of the regression function and error density crucially depends on the optimal estimations of bandwidth and semi-metric. A Bayesian method is utilized to simultaneously estimate the bandwidths in the regression function and kernel error density by minimizing the Kullback-Leibler divergence. For estimating the regression function and error density, a series of simulation studies demonstrate that the functional partial linear model gives improved estimation and forecast accuracies compared with the functional principal component regression and functional nonparametric regression. Using a spectroscopy dataset, the functional partial linear model yields better forecast accuracy than some commonly used functional regression models. As a by-product of the Bayesian method, a pointwise prediction interval can be obtained, and marginal likelihood can be used to select the optimal semi-metric.
description: 27 pages, 10 figures, to appear in Journal of Applied Statistics
Additional file 1 of Optimization of parasite DNA enrichment approaches to generate whole genome sequencing data for Plasmodium falciparum from low parasitaemia samples
Creators: name: Zalak Shah
name: Adams, Matthew
name: Moser, Kara A.
name: Biraj Shrestha
name: Stucke, Emily M.
name: Laufer, Miriam K.
name: Serre, David
name: Silva, Joana C.
name: Takala-Harrison, Shannon
Publisher: name: figshare
Year: 2020
Subjects: subject: Space Science
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Genetics
subject: Molecular Biology
subject: Evolutionary Biology
subject: Ecology
subject: 69999 Biological Sciences not elsewhere classified
subject: Cancer
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: Additional file 1. Supplementary material.
Terawatt-scale sub-10-fs laser technology - key to generation of GW-level attosecond pulses in X-ray free electron laser
Creators: name: Saldin, E. L.
name: Schneidmiller, E. A.
name: Yurkov, M. V.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: We propose a technique for the production of attosecond X-ray pulses which is based on the use of X-ray SASE FEL combined with a femtosecond laser system. A few-cycle optical pulse from a Ti:sapphire laser interacts with the electron beam in a two-period undulator resonant to 800 nm wavelength and produces energy modulation within a slice of the electron bunch. Following the energy modulator the electron beam enters the X-ray undulator and produces SASE radiation. Due to energy modulation the frequency is correlated to the longitudinal position within the few-cycle-driven slice of SASE radiation pulse. The largest frequency offset corresponds to a single-spike pulse in the time domain which is confined to one half-oscillation period near the central peak electron energy. The selection of single-spike pulses is achieved by using a crystal monochromator after the X-ray undulator. Our studies show that the proposed technique is capable to produce 300 attoseconds long single pulses with GW-level output power in the 0.1 nm wavelength range, and is applicable to the European X-Ray Laser Project XFEL and the Linac Coherent Light Source at SLAC.
description: 19 pages, 13 figures
Hedonic Capital
Creators: name: Graham, Liam
name: Oswald, Andrew J.
name: Graham, Liam
name: Oswald, Andrew J.
Publisher: name: Unknown
Year: 2006
Subjects: subject: Health Economics and Policy
subject: Labor and Human Capital
subject: Adaptation
subject: wellbeing
subject: evolution
subject: happiness
subject: habituation

description: This paper proposes a new way to think about happiness. It distinguishes between stocks and flows. Central to the analysis is a concept we call ‘hedonic capital’. The paper sets out a model of the dynamics of wellbeing in which bad life-shocks are smoothed by the drawing down of hedonic capital. The model fits the patterns found in the empirical literature: the existence of a stable level of wellbeing and a tendency to return gradually towards that level. It offers a theory of hedonic adaptation.
The other margin: do minimum wages cause working hours adjustments for low-wage workers?
Creators: name: Stewart, Mark B.
name: Swaffield, Joanna K.
name: Stewart, Mark B.
name: Swaffield, Joanna K.
Publisher: name: Unknown
Year: 2006
Subjects: subject: Financial Economics
subject: Labor and Human Capital
subject: Minimum wages
subject: working hours
subject: labour demand
subject: difference-indifferences estimator

description: This paper estimates the impact of the introduction of the UK minimum wage on the working hours of low-wage employees using difference-in-differences estimators. The estimates using the employer-based New Earnings Surveys indicate that the introduction of the minimum wage reduced the basic hours of low-wage workers by between 1 and 2 hours per week. The effects on total paid hours are similar (indicating negligible effects on paid overtime) and lagged effects dominate the smaller and less significant initial effects within this. Estimates using the employee-based Labour Force Surveys are typically less significant.
Global Worldsheet Anomalies from M-Theory
Creators: name: Sparks, James
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present an M-theory proof of the anomaly of Freed and Witten which in general shifts the quantisation law for the U(1) gauge field on a D6-brane. The derivation requires an understanding of how fields on the D6-brane lift to M-theory, together with a localisation formula which we prove using a U(1)-index theorem. We also show how the anomaly is related to the K-theory classification of Ramond-Ramond fields. In addition we discuss the M-theory origin of the D6-brane effective action, and illustrate the general arguments with a concrete example.
description: 25 pages; v2: minor alterations, references added; v3: various arguments clarified, mathematical background added. Published version
Who really wants to be a millionaire? Estimates of risk aversion from gameshow data
Creators: name: Hartley, Roger
name: Lanot, Gauthier
name: Walker, Ian
name: Hartley, Roger
name: Lanot, Gauthier
name: Walker, Ian
Publisher: name: Unknown
Year: 2006
Subjects: subject: Public Economics
subject: Risk and Uncertainty
subject: Risk aversion
subject: gameshow

description: This paper analyses the behaviour of contestants in one of the most popular TV gameshows ever to estimate risk aversion. This gameshow has a number of features that makes it well suited for our analysis: the format is extremely straightforward, it involves no strategic decision-making, we have a large number of observations, and the prizes are cash and paid immediately, and cover a large range – from £100 up to £1 million. Our data sources have the virtue that we are able to check the representativeness of the gameshow participants. Even though the CRRA model is extremely restrictive we find that a coefficient or relative risk aversion which is close to unity fits the data across a wide range of wealth remarkably well.
Photothermally Induced Transparency
Creators: name: Ma, Jinyong
name: Qin, Jiayi
name: Campbell, Geoff T.
name: Lecamwasam, Ruvi
name: Sripathy, Kabilan
name: Hope, Joe
name: Buchler, Ben C.
name: Lam, Ping Koy
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Induced transparency is a common but remarkable effect in optics. It occurs when a strong driving field is used to render an otherwise opaque material transparent. The effect is known as electromagnetically induced transparency in atomic media and optomechanically induced transparency in systems that consist of coupled optical and mechanical resonators. In this work, we introduce the concept of photothermally induced transparency (PTIT). It happens when an optical resonator exhibits non-linear behavior due to optical heating of the resonator or its mirrors. Similar to the established mechanisms for induced transparency, PTIT can suppress the coupling between an optical resonator and a traveling optical field. We further show that the dispersion of the resonator can be modified to exhibit slow or fast light. Because of the relatively slow thermal response, we observe the bandwidth of the PTIT to be $2π\times15.9$ Hz which theoretically suggests a group velocity of as low as $5$ m/s.
description: 14 pages, 6 figures
Synchronised Similar Triangles for Three-Body Orbit with Zero Angular Momentum
Creators: name: Fujiwara, Toshiaki
name: Fukuda, Hiroshi
name: Kameyama, Atsushi
name: Ozaki, Hiroshi
name: Yamada, Michio
Publisher: name: arXiv
Year: 2004
Subjects: subject: Mathematical Physics (math-ph)
subject: Dynamical Systems (math.DS)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Geometrical properties of three-body orbits with zero angular momentum are investigated. If the moment of inertia is also constant along the orbit, the triangle whose vertexes are the positions of the bodies, and the triangle whose perimeters are the momenta of the bodies, are always similar (``synchronised similar triangles''). This similarity yields kinematic equalities between mutual distances and magnitude of momenta. Moreover, if the orbit is a solution to the equation of motion under homogeneous potential, the orbit has a new constant involving momenta. For orbits with zero angular momentum and non-constant moment of inertia, we introduce scaled variables, positions divided by square root of the moment of inertia and momenta derived from the velocity of the scaled positions. Then the similarity and the kinematic equalities hold for the scaled variables. Using this similarity, we prove that any bounded three-body orbit with zero angular momentum under homogeneous potential whose degree is smaller than 2 has infinitely many collinear configurations (syzygies or eclipses) or collisions.
description: 14 pages, 3 figures, submitted to The Journal of Physics A
Shapes of the Proton
Creators: name: Miller, Gerald A.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: A model proton wave function, constructed using Poincare invariance, and constrained by recent electromagnetic form factor data, is used to study the shape of the proton. Spin-dependent quark densities are defined as matrix elements of density operators in proton states of definite spin-polarization, and shown to have an infinite variety of non-spherical shapes. For high momentum quarks with spin parallel to that of the proton, the shape resembles that of a peanut, but for quarks with anti-parallel spin the shape is that of a bagel.
description: 8 pages, 5 figures, to be submitted to Phys. Rev. C This corrects a few typos and explains some further connections with experiments
Nuclear multipole responses from chiral effective field theory interaction
Creators: name: Hu, B. S.
name: Wu, Q.
name: Yuan, Q.
name: Ma, Y. Z.
name: Yan, X. Q.
name: Xu, F. R.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We probe nuclear multipole resonances in the framework of the random-phase approximation by using the interaction obtained from the chiral effective field theory. The three-nucleon force is included in a form of the in-medium two-nucleon interaction which was derived from the chiral three-nucleon force. The isoscalar monopole, isoscalar dipole, isovector dipole and isoscalar quadrupole resonances of the closed-shell $^{56,68,78}$Ni have been investigated. The calculations reasonably reproduce the experimental multipole resonances of $^{56,68}$Ni, and well describe the pygmy dipole resonance and dipole polarizability measured in $^{68}$Ni. The multipole resonances of $^{78}$Ni, including pygmy dipole resonance and dipole polarizability, are predicted. The detailed effects of the tensor force and three-body force are analyzed by dissecting the chiral interaction. We find that in general the tensor force effect on electric giant resonances is not as significant as the effect from the three-body force, although the tensor force provides more than half of the binding energy. The effect from three-body force is strong in light nuclei. Particularly, three-body force is crucial for the formation of the pygmy resonance in calculations.
description: Accepted by PHYSICAL REVIEW C
Efficient Upgrading in Durable Network Goods: Is Commitment Always Good?
Creators: name: Athanasopoulos, Thanos
name: Athanasopoulos, Thanos
Publisher: name: Unknown
Year: 2015
Subjects: Financial Economics

description: In this article I explore an incumbent monopolistís incentives to upgrade in the future his durable network product in the presence of overlapping generations of customers and a potential entrant who may also sell a version of the same quality. When the incumbent has commitment power and entry cannot be deterred, he decides to withhold the upgrade when network e§ects are weak, as strategic complementarity between the competitorsíintertemporal pricing decisions allows him to charge su¢ ciently patient forward-looking consumers more in the present market. On the other hand, he commits to upgrade when network e§ects are strong, as there is strategic substitutability between Örmsíprices. Regarding welfare, the frequency of new products is not socially optimal when the quality improvement is negligible and smaller than their adoption cost. I Önd that both potential or actual competition and the incumbentís commitment power are sources of ine¢ ciency.