cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Adaptations To Major Curriculum Change: The Case Of Further Education Lecturers
Creators: name: Sieminski, Sandra Maria
Publisher: name: The Open University
Year: 2010

description: In the late 1980s and 1990s, like other sections of the UK education system, Further Education (FE) was subjected to major institutional change. Furthermore, there were significant government interventions in the curriculum of FE colleges: the introduction of General National Vocational Qualifications (GNVQs) and subsequently of the Advanced Vocational Certificate in Education (AVCE). The introduction of GNVQs in the early 1990s involved a substantial change in the working practices of FE lecturers. Not only was there modification to the content to be taught but the roles of lecturer and student were transformed. In 2000, GNVQ was replaced by AVCE. This too involved considerable modification in the work of FE lecturers, in some respects a shift back towards the situation prior to the introduction of GNVQ, but also introducing new elements. These changes are the focus of this thesis. The fundamental character of the switch to GNVQ, and the subsequent move away from it, provide a distinctive context for exploring lecturers’ responses and adaptations to dramatic and rapid change. Understanding these is important if we are to grasp the factors shaping the implementation of curricular policies, and their effects. This case study attempts to deepen understanding of the significant factors which influence policy implementation by investigating how recent curricular reforms in FE came about, and how lecturers responded to them, on the basis of data from documents and interviews. The conclusion reached is that how a policy gets implemented will reflect previously prevailing working practices, along with practitioners’ views about the sort of education they are engaged in, about their central professional task, and about how it ought to be carried out; views which will be shaped by different career trajectories. These factors determine attitudes both towards the goals of any new policy and towards the operational procedures it imposes.
Data-independent Low-complexity KLT Approximations for Image and Video Coding
Creators: name: Radünz, A. P.
name: da Silveira, T. L. T.
name: Bayer, F. M.
name: Cintra, R. J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Image and Video Processing (eess.IV)
subject: Multimedia (cs.MM)
subject: Numerical Analysis (math.NA)
subject: Signal Processing (eess.SP)
subject: Computation (stat.CO)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: The Karhunen-Loève transform (KLT) is often used for data decorrelation and dimensionality reduction. The KLT is able to optimally retain the signal energy in only few transform components, being mathematically suitable for image and video compression. However, in practice, because of its high computational cost and dependence on the input signal, its application in real-time scenarios is precluded. This work proposes low-computational cost approximations for the KLT. We focus on the blocklengths $N \in \{4, 8, 16, 32 \}$ because they are widely employed in image and video coding standards such as JPEG and high efficiency video coding (HEVC). Extensive computational experiments demonstrate the suitability of the proposed low-complexity transforms for image and video compression.
description: 18 pages, 15 figures, 4 tables
Formation of clusters in the ground state of the $t-J$ model on a two leg ladder
Creators: name: Fledderjohann, A.
name: Langari, A.
name: Muetter, K. -H.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We investigate the ground state properties of the $t-J$ model on a two leg ladder with anisotropic couplings ($t,α=J/t$) along rungs and ($t',α'=J'/t'$) along legs. We have implemented a cluster approach based on 4-site plaqettes. In the strong asymmetric cases $α/α'\ll 1$ and $α'/α\ll 1$ the ground state energy is well described by plaquette clusters with charges $Q=2,4$. The interaction between the clusters favours the condensation of plaquettes with maximal charge -- a signal for phase separation. The dominance of Q=2 plaquettes explains the emergence of tightly bound hole pairs. We have presented the numerical results of exact diagonalization to support our cluster approach.
description: 11 pages, 9 figures, RevTex4
How Swiss Small- and Medium-sized Firms Assess the Performance Impact of Mergers and Acquisitions
Creators: name: Arvanitis, Spyros
name: Stucki, Tobias
Publisher: name: ETH Zurich
Year: 2012
Subjects: Mergers and acquisitions
WIRTSCHAFTLICHKEIT
ECONOMIC EFFICIENCY
SMALL AND MEDIUM SIZED ENTERPRISES
Micro data
SCHWEIZ (MITTELEUROPA). SCHWEIZERISCHE EIDGENOSSENSCHAFT
KLEINE UND MITTLERE UNTERNEHMEN
SWITZERLAND (CENTRAL EUROPE). SWISS CONFEDERATION
Innovation performance
Economic performance
BETRIEBSSFUSIONEN
BUSINESS AMALGAMATIONS
info:eu-repo/classification/ddc/330
Economics

description: KOF Working Papers, 312
Re-evaluation of the comparative effectiveness of bootstrap-based optimism correction methods in the development of multivariable clinical prediction models
Creators: name: Iba, Katsuhiro
name: Shinozaki, Tomohiro
name: Maruo, Kazushi
name: Noma, Hisashi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applications (stat.AP)
subject: Methodology (stat.ME)
subject: FOS: Computer and information sciences

description: Multivariable predictive models are important statistical tools for providing synthetic diagnosis and prognostic algorithms based on multiple patients' characteristics. Their apparent discriminant and calibration measures usually have overestimation biases (known as 'optimism') relative to the actual performances for external populations. Existing statistical evidence and guidelines suggest that three bootstrap-based bias correction methods are preferable in practice, namely Harrell's bias correction and the .632 and .632+ estimators. Although Harrell's method has been widely adopted in clinical studies, simulation-based evidence indicates that the .632+ estimator may perform better than the other two methods. However, there is limited evidence and these methods' actual comparative effectiveness is still unclear. In this article, we conducted extensive simulations to compare the effectiveness of these methods, particularly using the following modern regression models: conventional logistic regression, stepwise variable selections, Firth's penalized likelihood method, ridge, lasso, and elastic-net. Under relatively large sample settings, the three bootstrap-based methods were comparable and performed well. However, all three methods had biases under small sample settings, and the directions and sizes of the biases were inconsistent. In general, the .632+ estimator is recommended, but we provide several notes concerning the operating characteristics of each method.
Анализ продовольственной ситуации в Кыргызской Республике
Creators: name: Батырканов, Мырзабек
name: Батырканов, Мырзабек
Publisher: name: Unknown
Year: 2014
Subjects: subject: Agribusiness
subject: Agricultural and Food Policy
subject: Food Security and Poverty
subject: Land Economics/Use
subject: Продовольственная безопасность
subject: ВВП - внутренняя валовая продукция
subject: Частная собственности на землю
subject: Прочности и стабильности кормовой базы
subject: Коэффициент самообеспеченности
subject: Food security
subject: GDP - gross domestic product
subject: private ownership of land
subject: the strength and stability of food supply
subject: self-sufficiency ratio

description: Исследуется производства сельскохозяйственной продукции, продуктов питания и их потребление на душу население в рамках продовольственной безопасности в Республике.
Dynamical instability of polytropic spheres in spacetimes with a cosmological constant
Creators: name: Posada, Camilo
name: Hladík, Jan
name: Stuchlík, Zdenek
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The dynamical instability of relativistic polytropic spheres, embedded in a spacetime with a repulsive cosmological constant, is studied in the framework of general relativity. We apply the methods used in our preceding paper to study the trapping polytropic spheres with $Λ= 0$, namely, the critical point method and the infinitesimal and adiabatic radial perturbations method developed by Chandrasekhar. We compute numerically the critical adiabatic index, as a function of the parameter $σ= p_{\mathrm{c}}/(ρ_{\mathrm{c}} c^2)$, for several values of the cosmological parameter $λ$ giving the ratio of the vacuum energy density to the central energy density of the polytrope. We also determine the critical values for the parameter $σ_{\mathrm{cr}}$, for the onset of instability, by using both approaches. We found that for large values of the parameter $λ$, the differences between the values of $σ_{\mathrm{cr}}$ calculated by the critical point method differ from those obtained via the radial perturbations method. Our results, given by both applied methods, indicate that large values of the cosmological parameter $λ$ have relevant effects on the dynamical stability of the polytropic configurations.
description: 15 pages, 8 figures. Minor typos corrected, accepted for publication in PRD
title: Applying latent semantic analysis to computer assisted assessment in the Computer Science domain: a framework, a tool, and an evaluation
Creators: name: Haley, Debra Trusso
Publisher: name: The Open University
Year: 2009

description: This dissertation argues that automated assessment systems can be useful for both students and educators provided that the results correspond well with human markers. Thus, evaluating such a system is crucial. I present an evaluation framework and show how and why it can be useful for both producers and consumers of automated assessment systems. The framework is a refinement of a research taxonomy that came out of the effort to analyse the literature review of systems based on Latent Semantic Analysis (LSA), a statistical natural language processing technique that has been used for automated assessment of essays. The evaluation framework can help developers publish their results in a format that is comprehensive, relatively compact, and useful to other researchers. The thesis claims that, in order to see a complete picture of an automated assessment system, certain pieces must be emphasised. It presents the framework as a jigsaw puzzle whose pieces join together to form the whole picture. The dissertation uses the framework to compare the accuracy of human markers and EMMA, the LSA-based assessment system I wrote as part of this dissertation. EMMA marks short, free text answers in the domain of computer science. I conducted a study of five human markers and then used the results as a benchmark against which to evaluate EMMA. An integral part of the evaluation was the success metric. The standard inter-rater reliability statistic was not useful; I located a new statistic and applied it to the domain of computer assisted assessment for the first time, as far as I know. Although EMMA exceeds human markers on a few questions, overall it does not achieve the same level of agreement with humans as humans do with each other. The last chapter maps out a plan for further research to improve EMMA.
Nuclear Parton Densities and Structure Functions
Creators: name: Tehrani, S. Atashbar
name: Khorramian, Ali N.
name: Mirjalili, A.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We calculate nuclear parton distribution functions (PDFs), using the constituent quark model. We find the bounded valon distributions in a nuclear to be related to free valon distributions in a nucleon. By using improved bounded valon distributions for a nuclear with atomic number $A$ and the partonic structure functions inside the valon, we can calculate the nuclear structure function in $x$ space. The results for nuclear structure-function ratio $F_2^A/F_2^D$ at some values of $A$ are in good agreement with the experimental data.
description: To be published in Int. Journal of Modern Phys. A
A Riemannian geometric approach for timelike and null spacetime geodesics
Creators: name: Argañaraz, Marcos A.
name: Andino, Oscar Lasso
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The geodesic motion in a Lorentzian spacetime can be described by trajectories in a $3-$dimensional Riemannian metric. In this article we present a generalized Jacobi metric obtained from projecting a Lorentzian metric over the directions of its Killing vectors. The resulting Riemannian metric inherits the geodesics for asymptotically flat spacetimes including the stationary and axisymmetric ones. The method allows us to find Riemannian metrics in three and two dimensions plus the radial geodesic equation when we project over three different directions. The $3-$dimensional Riemannian metric reduces to the Jacobi metric when static, spherically symmetric and asymptotically flat spacetimes are considered. However, it can be calculated for a larger variety of metrics in any number of dimensions. We show that the geodesics of the original spacetime metrics are inherited by the projected Riemannian metric. We calculate the Gaussian and geodesic curvatures of the resulting $2-$dimensional metric, we study its near horizon and asymptotic limit. We also show that this technique can be used for studying the violation of the strong cosmic censorship conjecture in the context of general relativity.
description: 22 pages
3613: Will Church and Jim Smith
Creators: name: Project Team, Lest We Forget
Publisher: name: University of Oxford
Year: 2024
Subjects: classificationCode: 430304
subject: British history
classificationCode: 430308
subject: European history (excl. British, classical Greek and Roman)
classificationCode: 430316
subject: International history

description: Will was the brother of the contributor's grandmother (4 girls and him) sadly killed in the war, believed to have been in July 1916.
Squarefrees are Gaussian in short intervals
Creators: name: Gorodetsky, Ofir
name: Mangerel, Alexander P.
name: Rodgers, Brad
Publisher: name: arXiv
Year: 2021
Subjects: subject: Number Theory (math.NT)
subject: Probability (math.PR)
subject: FOS: Mathematics

description: We show that counts of squarefree integers up to $X$ in short intervals of size $H$ tend to a Gaussian distribution as long as $H\rightarrow\infty$ and $H = X^{o(1)}$. This answers a question posed by R.R. Hall in 1989. More generally we prove a variant of Donsker's theorem, showing that these counts scale to a fractional Brownian motion with Hurst parameter $1/4$. In fact we are able to prove these results hold in general for collections of $B$-free integers as long as the sieving set $B$ satisfies a very mild regularity property, for Hurst parameter varying with the set $B$.
description: 34 pages, 6 figures. Accepted version. Minor changes (mostly typos and style)
Results in Optimal Discrimination
Creators: name: Hunter, Kieran
Publisher: name: arXiv
Year: 2004
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the problem of discriminating between non-orthogonal quantum states with least probability of error. We demonstrate that this problem can be simplified if we solve for the error itself rather than solving directly for the optimal measurement. This method enables us to derive solutions directly and thus make definite statements about the uniqueness of an optimal strategy. This approach immediately leads us to a state-discrimination analogue of Davies Theorem. In the course of this, a complete solution for distinguishing equally likely pure qubit states is presented.
description: 4 pages, 1 figure. To appear in the Proceedings of QCMC04
The Kinematics and Dark Matter Fractions of TNG50 Galaxies at z=2 from an Observational Perspective
Creators: name: Übler, Hannah
name: Genel, Shy
name: Sternberg, Amiel
name: Genzel, Reinhard
name: Price, Sedona H.
name: Schreiber, Natascha M. Förster
name: Shimizu, Taro T.
name: Pillepich, Annalisa
name: Nelson, Dylan
name: Burkert, Andreas
name: Davies, Ric
name: Hernquist, Lars
name: Lang, Philipp
name: Lutz, Dieter
name: Pakmor, Rüdiger
name: Tacconi, Linda J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We contrast the gas kinematics and dark matter contents of $z=2$ star-forming galaxies (SFGs) from state-of-the-art cosmological simulations within the $Λ$CDM framework to observations. To this end, we create realistic mock observations of massive SFGs ($M_*>4\times10^{10} M_{\odot}$, SFR $>50~M_{\odot}$ yr$^{-1}$) from the TNG50 simulation of the IllustrisTNG suite, resembling near-infrared, adaptive-optics assisted integral-field observations from the ground. Using observational line fitting and modeling techniques, we analyse in detail the kinematics of seven TNG50 galaxies from five different projections per galaxy, and compare them to observations of twelve massive SFGs by Genzel et al. (2020). The simulated galaxies show clear signs of disc rotation but mostly exhibit more asymmetric rotation curves, partly due to large intrinsic radial and vertical velocity components. At identical inclination angle, their one-dimensional velocity profiles can vary along different lines of sight by up to $Δv=200$ km s$^{-1}$. From dynamical modelling we infer rotation speeds and velocity dispersions that are broadly consistent with observational results. We find low central dark matter fractions compatible with observations ($f_{\rm DM}^v(
description: 25 pages, 16 figures, accepted for publication in MNRAS
3595: Brigadier Francis Walter (Tommy) Rice
Creators: name: Project Team, Lest We Forget
Publisher: name: University of Oxford
Year: 2024
Subjects: classificationCode: 430304
subject: British history
classificationCode: 430308
subject: European history (excl. British, classical Greek and Roman)
classificationCode: 430316
subject: International history

description: Brigadier Francis Walter (Tommy) Rice was part of the B/82nd Brigade in France from 1918 onwards. On 5th September 1918, he was gassed and invalided home.
3603: Story of the sons of the Darvell Family, Chesham Bakers (I)
Creators: name: Project Team, Lest We Forget
Publisher: name: University of Oxford
Year: 2024
Subjects: classificationCode: 430304
subject: British history
classificationCode: 430308
subject: European history (excl. British, classical Greek and Roman)
classificationCode: 430316
subject: International history

description: Born Chesham, Buckinghamshire April 1894. Son of George and Marion Harriett Darvell, brother of Nellie Darvell (see Robert). Baker in family business. Killed in action 25th September 1915 at Loos.Enlisted at Chesham, date unknown, and joined the Oxfordshire and Buckinghamshire Light Infantry. Transferred to 10th Battalion, Gloucestershire Regiment.Edward Darvell and the "Fighting Tenth" left Salisbury Plain for France on 8th August 1915, joining 1st Brigade of 1st Division, IV Corps, 1st Army around the town of Bethune.On 25th September 1915 during the battle of Loos, 10th Gloucesters advanced across no-man's land under a hail of machine-gun fire to take a small wood called Bois Carr. To add to their discomfort gas and smoke were blowing back in their faces. Nevertheless, the battalion pressed on and overran the German front line trench before reorganizing and pressing on towards the second line. 10th Battalion suffered very heavy casualties during this attack, nearly being wiped out with only sixty men still alive and unwounded at the end of the day. Edward Darvell was among those killed; he was 21 years old and has no known grave. Commemorated on the Loos Memorial.His brother George served Royal Army Service Corps on the Italian Front, but died of influenza 13th February 1919. He is buried in a war grave in Chesham.
Интеграционные процессы на Агропродовольственном рынке Казахстана
Creators: name: Бекенова, Г.Ы.
name: Бекенова, Г.Ы.
Publisher: name: Unknown
Year: 2014
Subjects: subject: Agricultural and Food Policy
subject: International Relations/Trade
subject: интеграция
subject: агропродовольственный рынок
subject: продовольственная безопасность
subject: конкурентоспособность
subject: integration
subject: the agri-food market
subject: food security
subject: competitiveness

description: Заключение договора между Казахстаном, Россией и Беларусью о создании Евразийского экономического союза (ЕАЭС) на базе Таможенного союза (ТС) и расширение границ ТС за счет вхождения в него новых членов ставит новые задачи по развитию агропродовольственного рынка и обеспечения продовольственной безопасности Казахстана. На основе системного анализа агропродовольственного рынка и происходящих интеграционных процессов установлено, что вовлечение агропродовольственного рынка РК в процессы международной экономической интеграции происходит по двум основным направлениям: - региональная экономическая интеграция, торговля со странами ближнего зарубежья; - интеграция в систему мирохозяйственных связей. Данные баланса импорта-экспорта продовольствия РК за последние годы свидетельствуют о преобладании объема импорта над экспортом почти в 2 раза. В Казахстане объем импорта молочной, мясной и плодоовощной продукции за последние 5 лет с каждым годом лишь увеличивается, варьируясь от 30 до 60% в зависимости от вида продовольствия, а также по большой части завозят основные продукты потребления, а не дорогие деликатесы. Это опасно для экономики страны: зависимость от внешнего рынка лишь увеличивается, конкуренция, как на внутреннем, так и внешнем рынках усиливается. Казахстан обеспечивает себя и близлежащие страны по немногим позициям, в основном хлебом и хлебопродуктами. Размеры предложения отечественной аграрной продукции на рынке напрямую зависят от объемов аграрного производства и развития сбыта. В РК остаются низкими продуктивность животных и птицы, имеет место сокращение поголовья КРС, овец и коз, производство молока сократилось. Слабо развиты сельхозмашиностроение, производство химикатов и удобрений, переработка продукции, целостное транспортное и материально-техническое обслуживание, большая часть инфраструктуры изношена, что приводит к высокой себестоимости и ценовой неконкурентоспособности отечественной продукции, хотя она более органическая. Для повышения эффективности агропродовольственного рынка РК рекомендуется повышение конкурентоспособности отечественной продукции, модернизация АПК, разработка единой внешнеторговой политики стран – членов Таможенного союза как внутри таможенной территории, так и за ее пределами, повышение экспортного потенциала и снижение зависимости внутреннего рынка от импорта основных продуктов питания.
3605: Connecting Chesham with New Zealand
Creators: name: Project Team, Lest We Forget
Publisher: name: University of Oxford
Year: 2024
Subjects: classificationCode: 430304
subject: British history
classificationCode: 430308
subject: European history (excl. British, classical Greek and Roman)
classificationCode: 430316
subject: International history

description: 2nd Battalion of the Wellington Infantry Regiment (17th Rauhine Company) in New Zealand Forces (ANZACS; New Zealand Division; 2nd Brigade) from 1st May 1916 until 28th April 1920. He served all his active fighting time on the Western Front in France and Belgium. He joined the Battalion in France on 7th December 1916. He was a skilled carpenter and he thus served as a battalion pioneer from much of his service.

He was seriously wounded (gunshot wound - thigh) in the final action of the NZ Division liberating Le Quesnoy on 4th November 1918. Invalided back in the UK by 10th November after which he had a long convalescence before returning to New Zealand in 1919.
Time Evolution in String Field Theory and T-duality
Creators: name: Ilderton, Anton
name: Mansfield, Paul
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The time evolution operator (Schrödinger functional) of quantum field theory can be expressed in terms of first quantised particles moving on the orbifold $S^1/Z_2$. We give a graphical derivation of this that generalises to second quantised string theory. T-duality then relates evolution through time t with evolution through 1/t and an interchange of string fields and backgrounds.
description: 11 Pages, 10 .eps figures; revised version includes discussion of BRST symmetry
Comprehensive analysis of the tidal effect in gravitational waves and implication for cosmology
Creators: name: Wang, Bo
name: Zhu, Zhenyu
name: Li, Ang
name: Zhao, Wen
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Detection of gravitational waves (GWs) produced by coalescence of compact binaries provides a novel way to measure the luminosity distance of GW events. Combining their redshift, they can act as standard sirens to constrain cosmological parameters. For various GW detector networks in 2nd-generation (2G), 2.5G and 3G, we comprehensively analyze the method to constrain the equation-of-state (EOS) of binary neutron-stars (BNSs) and extract their redshifts through the imprints of tidal effects in GW waveforms. We find for these events, the observations of electromagnetic counterparts in low-redshift range $z < 0.1$ are important for constraining the tidal effects. Considering 17 different EOSs of NSs or quark-stars, we find GW observations have strong capability to determine the EOS. Applying the events as standard sirens, and considering the constraints of NS's EOS derived from low-redshift observations as prior, we can constrain the dark-energy EOS parameters $w_0$ and $w_a$. In 3G era, the potential constraints are $Δw_0\in (0.0006,0.004)$ and $Δw_a\in(0.004,0.02)$, which are 1-3 orders smaller than those from traditional methods, including Type Ia supernovas and baryon acoustic oscillations. The constraints are also 1 order smaller than the method of GW standard siren by fixing the redshifts through short-hard $γ$-ray bursts, due to more available GW events in this method. Therefore, GW standard sirens, based on the tidal effect measurement, provide a realizable and much more powerful tool in cosmology.
description: 28 pages, 23 figures. Accepted for publication in ApJS
R&D and Non-linear Productivity Growth of Heterogeneous Firms
Creators: name: Kancs, D'Artis
name: Siliverstovs, Boriss
Publisher: name: ETH Zurich
Year: 2012
Subjects: BETRIEBLICHE INVESTITIONEN
Generalised propensity score
MEMBER COUNTRIES OF THE OECD (ORGANIZATION FOR ECONOMIC COOPERATION AND DEVELOPMENT)
R&D investment
ECONOMIC PRODUCTIVITY
FORSCHUNG UND ENTWICKLUNG
BUSINESS INVESTMENTS
OECD-MITGLIEDSLÄNDER (ORGANISATION FÜR WIRTSCHAFTLICHE ZUSAMMENARBEIT)
WIRTSCHAFTLICHE PRODUKTIVITÄT
RESEARCH AND DEVELOPMENT
Firm productivity
info:eu-repo/classification/ddc/330
Economics

description: KOF Working Papers, 315
Gravitation and Electromagnetic Wave Propagation with Negative Phase Velocity
Creators: name: Mackay, Tom G.
name: Lakhtakia, Akhlesh
name: Setiawan, Sandi
Publisher: name: arXiv
Year: 2004
Subjects: subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: Gravitation has interesting consequences for plane wave propagation in a vacuum. The propagation of plane waves with phase velocity directed opposite to the the time-averaged Poynting vector is investigated for a generally curved spacetime. Conditions for such negative-phase-velocity (NPV) propagation are established in terms of the metric components for general and special cases. The negative energy density implications of NPV propagation are discussed.
Energies for elastic plates and shells from quadratic-stretch elasticity
Creators: name: Vitral, E.
name: Hanna, J. A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We derive stretching and bending energies for isotropic elastic plates and shells. Through the dimensional reduction of a bulk elastic energy quadratic in Biot strains, we obtain two-dimensional bending energies quadratic in bending measures featuring a bilinear coupling of stretches and geometric curvatures. For plates, the bending measure is invariant under spatial dilations and naturally extends primitive bending strains for straight rods. For shells or naturally-curved rods, the measure is not dilation invariant, and contrasts with previous \emph{ad hoc} postulated forms. The corresponding field equations and boundary conditions feature moments linear in the bending measures, and a decoupling of stretching and bending such that application of a pure moment results in isometric deformation of a unique neutral surface, primitive behaviors in agreement with classical linear response but not displayed by commonly used analytical models. We briefly comment on relations between our energies, those derived from a neo-Hookean bulk energy, and a commonly used discrete model for flat membranes. Although the derivation requires consideration of stretch and rotation fields, the resulting energy and field equations can be expressed entirely in terms of metric and curvature components of deformed and reference surfaces.
description: correction appended to end of document
A provably entropy stable subcell shock capturing approach for high order split form DG for the compressible Euler Equations
Creators: name: Hennemann, Sebastian
name: Rueda-Ramírez, Andrés M.
name: Hindenlang, Florian J.
name: Gassner, Gregor J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: The main result in this paper is a provably entropy stable shock capturing approach for the high order entropy stable DGSEM based on a hybrid blending with a subcell low order variant. Since it is possible to rewrite a high order SBP operator into an equivalent conservative finite volume form, we were able to design a low order scheme directly with the LGL nodes that is compatible to the discrete entropy analysis used for the proof of the entropy stable DGSEM. Furthermore, we present a hybrid low order/high order discretisation where it is possible to seamlessly blend between the two approaches, while still being provably entropy stable. We are able to extend the approach to three spatial dimensions on unstructured curvilinear hexahedral meshes. We validate our theoretical findings and demonstrate convergence order for smooth problems, conservation of the primary quantities and discrete entropy stability for an arbitrary blending on curvilinear grids. In practical simulations, we connect the blending factor to a local troubled element indicator that provides the control of the amount of low order dissipation injected into the high order scheme. We modified an existing shock indicator, which is based on the modal polynomial representation, to our provably stable hybrid scheme. The aim is to reduce the impact of the parameters as good as possible. We describe our indicator in detail and demonstrate its robustness in combination with the hybrid scheme, as it is possible to compute all the different test cases without changing the indicator. The test cases include e.g. the double Mach reflection setup, forward and backward facing steps with shock Mach numbers up to 100. The proposed approach is relatively straight forward to implement in an existing entropy stable DGSEM code as only modifications local to an element are necessary.
description: 35 pages, 10 figures
Supplementary Information from Evolution of contribution timing in public goods games
Creators: name: Morsky, Bryce
name: Smolla, Marco
name: Akçay, Erol
Publisher: name: The Royal Society
Year: 2020
Subjects: subject: Ecology
subject: FOS: Biological sciences
subject: 60102 Bioinformatics
subject: FOS: Computer and information sciences
subject: 10202 Biological Mathematics
subject: FOS: Mathematics

description: Life-history strategies are a crucial aspect of life, which are complicated in group-living species, where pay-offs additionally depend on others’ behaviours. Previous theoretical models of public good games have generally focused on the amounts individuals contribute to the public good. Yet a much less-studied strategic aspect of public good games, the timing of contributions, can also have dramatic consequences for individual and collective performance. Here, we develop two stage game theoretical models to explore how the timing of contributions evolves. In the first stage, individuals contribute to a threshold public good based on a performance schedule. The second stage begins once the threshold is met, and the individuals then compete as function of their performance. We show how contributing rapidly is not necessarily optimal, since delayers can act as ‘cheats,’ avoiding contributing while reaping the benefits of the public good. However, delaying too long can put the delayers at a disadvantage as they may be ill-equipped to compete. These effects lead to bistability in a single group, and spatial diversity among multiple interacting groups.
Protecting quantum Fisher information in correlated quantum channels
Creators: name: Hu, Ming-Liang
name: Wang, Hui-Fang
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum Fisher information (QFI) has potential applications in quantum metrology tasks. We investigate QFI when the consecutive actions of a quantum channel on the sequence of qubits have partial classical correlations. Our results showed that while the decoherence effect is detrimental to QFI, effects of such classical correlations on QFI are channel-dependent. For the Bell-type probe states, the classical correlations on consecutive actions of the depolarizing and phase flip channels can be harnessed to improve QFI, while the classical correlations in the bit flip and bit-phase flip channels induce a slight decrease of QFI. For a more general parameterization form of the probe states, the advantage of using initial correlated system on improving QFI can also be remained in a wide regime of the correlated quantum channels.
description: 7 pages, 4 figures
A far infrared view of the Lockman Hole from ISO 95 micron observations - II. Optical identifications and insights into the nature of the far-infrared sources
Creators: name: Rodighiero, G.
name: Fadda, D.
name: Franceschini, A.
name: Lari, C.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the optical identifications of a 95 micron ISOPHOT sample in the Lockman Hole over an area of about half square degree. The catalogue (Rodighiero et al. 2003) includes 36 sources, making up a complete flux-limited sample for fluxes > 100 mJy. Reliable sources were detected, with decreasing but well-controlled completeness, down to 20 mJy. We have combined mid-IR and radio catalogues in this area to identify the potential optical counterparts of the far-IR sources. We found 14 radio and 13 15 micron associations, 10 of which have both associations. For the 11 sources with spectroscopic redshift, we have performed a spectrophotometric analysis of the observed Spectral Energy Distributions. Four of these 95 micron sources have been classified as faint IR galaxies (L_FIR<1.e11 solar luminosity), six as LIRGs and only one ULIRG. We have discussed the redshift distribution of these objects, comparing our results with evolutionary model predictions 95 and 175 micron. Given their moderate distances (the bulk of the closest spectroscopically identified objects lying at z<0.2), their luminosities and star formation rates (median value 10 solar masses/yr), the sources unveiled by ISOPHOT at 95 micron seem to correspond to the low redshift (z<0.3) FIRBACK 175 micron population, composed of dusty, star-forming galaxies with moderate star formation rates. We computed and compared different SFR estimators, and found that the SF derived from the bolometric IR luminosity is well correlated with that computed from the radio and mid-IR fluxes.
description: Accepted for publication in MNRAS, a full resolution version can be downloaded from http://dipastro.pd.astro.it/giulia/PHOT/ME681rv.ps.gz
8081: Henry Francis Woodward, Royal Engineers
Creators: name: Project Team, Lest We Forget
Publisher: name: University of Oxford
Year: 2024
Subjects: classificationCode: 430304
subject: British history
classificationCode: 430308
subject: European history (excl. British, classical Greek and Roman)
classificationCode: 430316
subject: International history

description: Henry Francis Woodward was born in 1880. He attended school in the Ewelme Benson area. On leaving school he followed his father into the building industry and trained as a bricklayer, working for Boshers in Cholsey and living with his family at 53 Honey Lane.

Henry enlisted into the Army when the war broke out. He was posted to the Royal Engineers and given regimental number 97037. After basic training, he landed in France on 16 October 1915 and began his period of active service. He served with 250th Tunnelling Company of the Royal Engineers.

In December 1915, Henry suffered the effects of a gas attack on his position. The war diaries were very general and no specific details are given (the diary states '85 men in hospital including 5 wounded').

Henry spent approximately four months in hospital until he finally succumbed to the effects of the gas. He died on 28 March 1916. He is buried in a cemetery near Étaples.

After the war, Henry's family was presented with his medals (1914-15 Star, British War with Victory) and also a memorial plaque.
Combined explanations of $(g-2)_μ$, $R_{D^{(\ast)}}$, $R_{K^{(\ast)}}$ anomalies in a two-loop radiative neutrino mass model
Creators: name: Saad, Shaikh
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Motivated by the long-standing tension in the muon anomalous magnetic moment (AMM) and persistent observations of B-physics anomalies in $R_{D^{(\ast)}}$ and $R_{K^{(\ast)}}$ ratios, we construct a simple two-loop radiative neutrino mass model, and propose a combined explanations of all these apparently disjoint phenomena within this framework. Our proposed model consists of two scalar leptoquarks (LQs), a $SU(2)_L$ singlet $S_1\sim (\overline{3},1,1/3)$ and a $SU(2)_L$ triplet $S_3\sim (\overline{3},3,1/3)$ to accommodate $R_{D^{(\ast)}}$ and $R_{K^{(\ast)}}$ anomalies, respectively. The muon receives chirality-enhanced contribution towards its $g-2$ due to the presence of $S_1$ LQ that accounts for the observed deviation from the Standard Model prediction. Furthermore, we introduce a $SU(2)_L$ singlet scalar diquark $ω\sim (\overline{6},1,2/3)$, which is necessary to break lepton number and generate neutrino mass radiatively with the aid of $S_1$ and $S_3$ LQs. We perform a detailed phenomenological analysis of this set-up and demonstrate its viability by providing benchmark points where a fit to the neutrino oscillation data together with proper explanations of the muon AMM puzzle and flavor anomalies are accomplished while simultaneously meeting all other flavor violation and collider bounds.
description: 41 pages, 7 figures. Accepted in Physical Review D
Firm characteristics and the cyclicality of R&D investments
Creators: name: Arvanitis, Spyridon
name: Wörter, Martin
Publisher: name: ETH Zurich
Year: 2011
Subjects: UNTERNEHMENSFORMEN
Anti-cyclical behaviour
REIHENFOLGEPLANUNG (OPERATIONS RESEARCH)
FORMS OF BUSINESS ORGANIZATIONS
INVESTMENTS
JOB SEQUENCING (OPERATIONS RESEARCH)
FORSCHUNG UND ENTWICKLUNG
Pro-cyclical behaviour
R&D
RESEARCH AND DEVELOPMENT
INVESTITIONEN
info:eu-repo/classification/ddc/330
info:eu-repo/classification/ddc/620
Economics
Engineering & allied operations

description: KOF Working Papers, 277
Troubadourian reconstructions : the poetics of discovery in the Renaissance
Creators: name: Della Santina, Siddhartha
Publisher: name: University of British Columbia
Year: 2010

description: "Discovery is not only finding new things," Leonardo Olschki wrote of the Renaissance voyage of exploration. This essay attempts to examine the intersection between the "old" and the "new," the "already known" and the "other," within the act of "discovery." Taking as a starting point Giovanni Battista Ramusio’s seminal Delle Navigazoni et Viaggi of 1550-1559, the bricolage of "discovery" will be considered, as the elements of memory, architecture, cartography, art theory and practice constitute the materials with which the Renaissance "discovery" poetically reconstructed what had hitherto been unknown.
The dynamics of labor productivity in Swiss universities
Creators: name: Bolli, Thomas
name: Farsi, Mehdi
Publisher: name: ETH Zurich
Year: 2011
Subjects: UNIVERSITIES (HIGHER EDUCATION)
UNIVERSITÄTEN + HOCHSCHULEN (HOCHSCHULWESEN)
Swiss Universities
Malmquist Index
Decomposition
ARBEITSPRODUKTIVITÄT
LABOUR PRODUCTIVITY
Autocorrelation
SWITZERLAND (CENTRAL EUROPE). SWISS CONFEDERATION
Parametric Distance Function
SCHWEIZ (MITTELEUROPA). SCHWEIZERISCHE EIDGENOSSENSCHAFT
PARAMETRIC METHODS (MATHEMATICAL STATISTICS)
PARAMETRISCHE METHODEN (MATHEMATISCHE STATISTIK)
Heterogeneity
info:eu-repo/classification/ddc/370
info:eu-repo/classification/ddc/330
Education
Economics

description: KOF Working Papers, 278
A de Finetti representation for finite symmetric quantum states
Creators: name: Koenig, Robert
name: Renner, Renato
Publisher: name: arXiv
Year: 2004
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Consider a symmetric quantum state on an n-fold product space, that is, the state is invariant under permutations of the n subsystems. We show that, conditioned on the outcomes of an informationally complete measurement applied to a number of subsystems, the state in the remaining subsystems is close to having product form. This immediately generalizes the so-called de Finetti representation to the case of finite symmetric quantum states.
description: 22 pages, LaTeX
The Steklov problem on triangle-tiling graphs in the hyperbolic plane
Creators: name: Tschanz, Léonard
Publisher: name: arXiv
Year: 2022
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: We introduce a graph $Γ$ which is roughly isometric to the hyperbolic plane and we study the Steklov eigenvalues of a subgraph with boundary $Ω$ of $Γ$. For $(Ω_l)_{l\geq 1}$ a sequence of subraphs of $Γ$ such that $|Ω_l| \longrightarrow \infty$, we prove that for each $k \in \mathbb{N}$, the $k^{\mbox{th}}$ eigenvalue tends to $0$ proportionally to $1/|B_l|$. The idea of the proof consists in finding a bounded domain $N$ of the hyperbolic plane which is roughly isometric to $Ω$, giving an upper bound for the Steklov eigenvalues of $N$ and transferring this bound to $Ω$ via a process called discretization.
description: 27 pages
Image Series Showing Anatomical Changes in Diabetic Foot
Creators: name: Sarla, Gurmeet Singh
Publisher: name: figshare
Year: 2020
Subjects: subject: 111002 Clinical Nursing: Primary (Preventative)
subject: FOS: Health sciences

description: Introduction: Diabetic patients are 15 times more likely to develop gangrene, requiring amputation. Most of the non-traumatic limb amputations are due to complications of diabetes. Aim: The aim of this image series was to appreciate the various anatomical changes occurring in patients with diabetic foot ulcers. Materials and Methods: A prospective study was carried out in 70 patients presenting to the Diabetic Clinic at a tertiary care hospital in Delhi, India regarding the site, size, nature of foot lesions. Results and Conclusion: Seventy patients with various presentations of diabetic foot were studied in the patients reporting to a tertiary hospital at Delhi. 21 patients (34.2%) had foot lesions which responded well to conservative management by regular chiropody.19 patients (27.1%) underwent wound debridement, abscess drainage and regular dressings following which, the wounds healed well with secondary intention.27 patients underwent amputations at various levels in the foot, 11 patients required skin grafting.3 patients developed diabetic ketoacidosis and septicemia, and were managed aggressively in ICU with insulin IV fluids and antibiotics. It was found that with proper diabetic control, surgical intervention and antibiotics, the wounds healed well.
Topological Modes Protected by Chiral and Two-Fold Rotational Symmetry in a Spring-Mass Model with a Lieb Lattice Structure
Creators: name: Wakao, Hiromasa
name: Yoshida, Tsuneya
name: Mizoguchi, Tomonari
name: Hatsugai, Yasuhiro
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We propose how to realize the topological modes, which correspond to topological zero modes for a quantum system, protected by chiral and rotation symmetry for a mechanical system. Specifically, we show the emergence of topological modes protected by chiral and two-fold rotational symmetry by a spring-mass system with a Lieb lattice structure and dents on the floor. Moreover, comparing the results of a tight-binding model, we have found the additional topological modes for our spring-mass model due to the extra degrees of freedoms. Our approach to realize the topological modes can be applied to other cases with rotation symmetry, e.g., a system of a honeycomb lattice with three-fold rotational symmetry.
description: 4 pages, 2 figures
ROZWÓJ WYBRANYCH PRZEDSIĘBIORSTW MLECZARSKICH I PRZETWÓRSTWA OWOCOWO-WARZYWNEGO W LATACH 2010-2012
Creators: name: Lisek, Sławomir
name: Lisek, Sławomir
Publisher: name: Unknown
Year: 2015
Subjects: subject: Agribusiness
subject: financial condition of the enterprise
subject: diary enterprises
subject: fruit-vegetables firms
subject: development of the enterprise

description: The aim of the study was to examine the prospects for agriculture in the production of milk and fruit and vegetables on the possibilities of product sales, resulting from changes in the development of processing companies. Agriculture is an important segment of the polish economy. Development of the agriculture depends on the possibility of the selling their products. This depends on the situation of the processing enterprises. After study one should say that general situation of the diary companies is better then fruit – vegetables companies. But situation of the both groups of enterprises in 2012 is worse then in 2010. This is bad forecast for the agriculture.
Unitals with many involutory translations
Creators: name: Grundhöfer, Theo
name: Stroppel, Markus J.
name: Van Maldeghem, Hendrik
Publisher: name: arXiv
Year: 2022
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 51A10 51E10

description: If every point of a unital is fixed by a non-trivial translation and at least one translation has order two then the unital is classical (i.e., hermitian).