cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Rényi Entropy, Signed Probabilities, and the Qubit
Creators: name: Brandenburger, Adam
name: La Mura, Pierfrancesco
name: Zoble, Stuart
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The states of the qubit, the basic unit of quantum information, are $2 \times 2$ positive semi-definite Hermitian matrices with trace 1. We contribute to the program to axiomatize quantum mechanics by characterizing these states in terms of an entropic uncertainty principle formulated on an eight-point phase space. We do this by employing Rényi entropy (a generalization of Shannon entropy) suitably defined for the signed phase-space probability distributions that arise in representing quantum states.
description: 13 pages, 1 figure
The role of household saving in the modern economy
Creators: name: STEINDL, J.
Publisher: name: PSL Quarterly Review
Year: 2013
Subjects: subject: Household savings, business profits, government deficits, employment
subject: E21, H31, O16

description: The work considers the role of household saving in the modern industrial economy. It is argued that an increased saving of households depresses business profits and leads to government deficits. From the point of view of full employment policy household savings are more troublesome than business savings because, unlike the latter, they do not stimulate investment decisions. In light of this the question of functional distribution ceases to be the only matter of concern, and the question of the inequality of personal incomes moves to the foreground. Thus the consideration of the trend of household saving may involve a certain shift in attitudes of economists interested in full employment. JEL: E21, H31, O16
description: PSL Quarterly Review, V. 35, N. 140 (1982)
Phenomenology of Noncommutative Field Theories
Creators: name: Carone, Christopher D.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Experimental limits on the violation of four-dimensional Lorentz invariance imply that noncommutativity among ordinary spacetime dimensions must be small. In this talk, I review the most stringent bounds on noncommutative field theories and suggest a possible means of evading them: noncommutativity may be restricted to extra, compactified spatial dimensions. Such theories have a number of interesting features, including Abelian gauge fields whose Kaluza-Klein excitations have self couplings. We consider six-dimensional QED in a noncommutative bulk, and discuss the collider signatures of the model.
description: 7 pages RevTeX, 4 eps figures, Invited plenary talk, IX Mexican Workshop on Particles and Fields, November 17-22, 2003, Universidad de Colima, Mexico
Abundances in a Large Sample of Stars in M3 and M13
Creators: name: Cohen, Judith G.
name: Melendez, Jorge
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have carried out a detailed abundance analysis for 21 elements in a sample of 25 stars with a wide range in luminosity from luminous giants to stars near the main sequence turnoff in the globular cluster M13 and in a sample of 13 stars distributed from the tip to the base of the RGB in the GC M3. Most elements, including Fe, show no trend with Teff, and low scatter around the mean between the top of the RGB and near the main sequence turnoff. We have detected an anti-correlation between O and Na abundances, observed previously among the most luminous RGB stars in both of these clusters, in both M3 and in M13 over the full range of luminosity of our samples, i.e. in the case of M13 to near the main sequence turnoff. M13 shows a larger range in both O and Na abundance than does M3 at all luminosities, in particular having a few stars at its RGB tip with unusually strongly depleted O. Although CN burning must be occurring in both M3 and in M13, and ON burning is required for M13, we combine our new O abundances with published C and N abundances to confirm with quite high precision that the sum of C+N+O is constant near the tip of the giant branch, and we extend this down to the bump in the luminosity function. Star I-5 in M13 has large excesses of Y and of Ba, with no strong enhancement of Eu, suggesting an s-process event contributed. The mean abundance ratios for M3 and for M13 are identical to within the errors. The abundance ratios for 13 Galactic GCs with recent detailed abundance analyses are compared to those of published large surveys of metal-poor halo field stars. For most elements, the agreement is very good, suggesting a common chemical history for the halo field and cluster stars.
description: Accepted to the AJ (Jan 2005 issue). Tables 5a,b,c are given in full in separate Latex files and will only be published electronically
The vapor compression cycle in aircraft air conditioning systems
Creators: name: Müller, Christian
name: Scholz, Dieter
Publisher: name: HAW Hamburg
Year: 2017
Subjects: subject: aircraft
subject: system
subject: air conditioning
subject: ECS
subject: cabin
subject: simulation
subject: Air Cycle Machine
subject: ACM
subject: Vapor Cycle Machine
subject: VCM
subject: MATLAB
subject: Simulink
subject: FLECS
subject: 620: Ingenieurwissenschaften

description: The vapor compression cycle (VCC) is the principle of the Vapor Compression Refrigeration System (VCRS) known in aviation as the Vapor Cycle Machine (VCM). This is an alternative air conditioning cooling principle in contrast to the usually applied Air Cycle Machine (ACM). This Technical Note looks at dynamic simulation of VCMs in comparison to ACMs. Different alternative VCMs are proposed.
An assessment of variable radius plot sampling techniques for measuring change over time : a simulation study
Creators: name: Carter, David Hugh Harrison
Publisher: name: University of British Columbia
Year: 2011

description: The most commonly used approach for measuring change over time involves using Fixed Radius Plots (FRPs). A major disadvantage of using FRPs for detecting change is the cost of implementation, both statistically and monetarily. Variable Radius Plots (VRP) can also used for measuring change over time; however, VRPs have not been widely used due to perceived problems including: 1. sudden additions to the value of interest which produce high variability; 2. complex mathematical formulae used for computation; 3. use of an angle for measuring trees; and 4. lack of studies on the use of VRPs for measuring change over time. In this thesis four VRP change estimators were evaluated: (1) the traditional subtraction estimator; (2) the Grosenbaugh estimator; (3) the Distance Variable (DV) estimator; and (4) the Flewelling estimator. Tree and stand data were generated using a stand simulator (StandSim), and stands were sampled using a series of SAS programs. Volume change, basal area change, and stems per hectare change were calculated for a series of 54 stand conditions in which density, dbh distribution, mortality, and spatial distribution were varied. Relative efficiencies were calculated comparing each VRP estimator to both the FRP estimator, and the subtraction estimator. The DV estimator had a relative efficiency greater than 1.0 (i.e., it was more precise) in 59% of the scenarios for volume change, 15% of the scenarios for basal area change, and 0% of scenarios for stems per hectare change when compared to FRP. Mortality is a high source of variability for all estimators and in another comparison where high mortality scenarios were excluded, the DV estimator had a relative efficiency greater than 1.0 in 74% of scenarios for volume change, 30% of scenarios for basal area change, and 0% of scenarios for stems per hectare change. The DV estimator had a relative efficiency greater than 1.0 in at least 70% of the scenarios for each attribute when compared to the traditional subtraction method, excluding the high mortality scenarios. This thesis demonstrates that VRP estimators for measuring change over time (in particular the DV estimator) can reduce the variability introduced by sudden additions of value. VRP estimators are not so complex that they should be excluded as an option for use, and require no new field techniques. Further studies should be completed to support the use of VRPs for change detection.
title: Modeling nutrient emissions in river catchments in Upper Austria : a sensitivity analysis
Creators: name: Bantelman, Ashley Marie
Publisher: name: TU Wien
Year: 2014
Subjects: subject: nutrient emissions
subject: rivers
subject: water quality
subject: sensitivity analysis
subject: environmental modeling

description: The Leibniz-Institute of Freshwater Ecology and Inland Fisheries in Berlin developed the model MONERIS (MOdeling Nutrients Emissions in RIver Systems) to assess nutrient emissions in river systems, and it has been applied throughout Europe and the rest of the world. The model covers seven pathways for nutrient emissions into surface waters which include point source emissions, atmospheric deposition, groundwater runoff, tile drainage, urban areas, erosion, and overland flow. This thesis utilizes an application of the model MONERIS to river systems in the Upper Austria Region. While the model has been applied to all seven pathways, this thesis focuses on emissions via erosion (agricultural and natural erosion), groundwater runoff, and tile drainage systems. This thesis serves as a sensitivity analysis for the MONERIS model in order to guide researchers who intend to use the model in the future. Specifically, the intention is to evaluate the sensitivity of model results on variations of the input data. In order to apply this model to river systems in the future, it is useful and important to reduce inaccuracies of input data when using the model as much as possible, especially for those input data impacting model results most. Once possible sources of inaccuracies are properly understood, we can better understand how to manage pollution and control water quality in river catchments in Upper Austria and other river systems throughout the planet.
Italy’s international reserves and their determinants in the Seventies: an assessment of the country risk
Creators: name: SAVONA, P.
name: TULLIO, G.
Publisher: name: PSL Quarterly Review
Year: 2013
Subjects: subject: International reserves, exchange rate policy, international capital markets
subject: F31, F32, G15

description: The present paper analyses policies for and developments in Italian international reserves in the seventies and compares them with similar developments in industrial countries. Particular emphasis is placed on the study of the possibilities of influencing the terms of trade in the short to medium run by an appropriate exchange rate policy coupled with the use of international reserves. Further attention is given to the adequacy of Italian international reserves, particularly in the light of the position of the country as a borrower in international capital markets. JEL: F31, F32, G15
description: PSL Quarterly Review, V. 35, N. 140 (1982)
Tullich Field (9/23a-29U) core displays
Creators: name: J. M. RODRIGUEZ
name: H. SCHOLEY
name: K. P. FLANAGAN
Publisher: name: Geological Society of London
Year: 2020
Subjects: subject: Geology
subject: FOS: Earth and related environmental sciences

description: Tullich Field, operated 100% by Kerr-McGee North Sea (UK) Limited, lies in block 9/23a. Well 9/23a-29U was drilled 40 feet north east of the original 9/23a-29A vertical well. Two 60 feet cores, cut with 100% recovery from 5576 to 5691.3 feet md in the Lower Eocene, Balder B2 unit, contain the complete sequence of hydrocarbon bearing sands penetrated in the vertical hole. Although no wire line or LWD data were acquired over the cored section, geophysical and image log data obtained from 9/23a-29A correlate closely with the sequence cored. The cores comprise high quality thick bedded structureless reservoir sandstones within an interbedded sequence of argillaceous sandstones, clay clast conglomerates, sandy and muddy debris flows, laminated siltstones and thin tuffaceous claystone beds. The non-reservoir rock represents the high impedance unit observed in the inverted shear wave seismic data. The reservoir sandstones are dusky yellowish-brown, medium-fine grained and well sorted. Six reservoir units were cored giving a total net thickness of 46.5 feet. The main unit is 34.5 feet thick and is represented by several stacked units - at the base lies a thin teredo bored wood mass and towards the top common pyrite is observed. The remaining sandstones are significantly thinner and represent single beds. Porosities vary from 29-36% with permeabilities up to 5 Darcies. Although predominantly massive, some minor dewatering structures and bedding planes are observed as well as a general fining up from base to top. These reservoir sandstones are interpreted as the stacked 'a' division of the Bouma cycle, deposited from a series of concentrated density flows in a deep water marine setting. The non-reservoir sequences by constrast show overturned bedding, rip up clasts and injection structures as well as laminated sediments. These are interpreted as being derived from various sources ranging from background suspension and air born fall out to gravity driven flows in a basinal marine environment. Open and cemented fractures and faults occur throughout the core.
International indebtedness, interest rates and inflation
Creators: name: MANES, P.
Publisher: name: PSL Quarterly Review
Year: 2013
Subjects: subject: International indebtedness, interest rates, inflation
subject: F34, E31, E43

description: The work establishes that international indebtedness, as well as domestic government and corporate indebtedness, tend to degenerate, and then become self-feeding, when interests cannot be paid out of the return on the capital employed but are paid out of new borrowings. Furthermore, such a degeneration can be the farther extended, the greater the bank intermediation in medium and long term lending and the more fully the banking system is integrated. The author concludes that the outcome of this process must be inflation, which cannot be overcome through high interest rates since they feed higher indebtedness. JEL: F34, E31, E43
description: PSL Quarterly Review, V. 35, N. 140 (1982)
Large-N expansion based on the Hubbard operator path integral representation and its application to the t-J model II. The case for finite $J$
Creators: name: Foussats, Adriana
name: Greco, Andrés
Publisher: name: arXiv
Year: 2004
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We have introduced a new perturbative approach for $t-J-V$ model where Hubbard operators are treated as fundamental objects. Using our vertices and propagators we have developed a controllable large-N expansion to calculate different correlation functions. We have investigated charge density-density response and the phase diagram of the model. The charge correlations functions are not very sensitive to the value of $J$ and they show collective peaks (or zero sound) which are more pronounced when they are well separated (in energy) from the particle-hole continuum. For a given $J$ a Fermi liquid state is found to be stable for doping $δ$ larger than a critical doping $δ_c$. $δ_c$ decreases with decreasing $J$. For the physical region of the parameters and, for $δ< δ_c$, the system enters in an incommensurate flux or DDW phase. The inclusion of the nearest-neighbors Coulomb repulsion $V$ leads to a CDW phase when $V$ is larger than a critical value $V_c$. The dependence of $V_c$ with $δ$ and $J$ is shown. We have compared the results with other ones in the literature.
description: 10 pages, 8 figures, to appear in Phys. Rev. B
Machine Learning Force Fields
Creators: name: Unke, Oliver T.
name: Chmiela, Stefan
name: Sauceda, Huziel E.
name: Gastegger, Michael
name: Poltavsky, Igor
name: Schütt, Kristof T.
name: Tkatchenko, Alexandre
name: Müller, Klaus-Robert
Publisher: name: arXiv
Year: 2020
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Machine Learning (stat.ML)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: In recent years, the use of Machine Learning (ML) in computational chemistry has enabled numerous advances previously out of reach due to the computational complexity of traditional electronic-structure methods. One of the most promising applications is the construction of ML-based force fields (FFs), with the aim to narrow the gap between the accuracy of ab initio methods and the efficiency of classical FFs. The key idea is to learn the statistical relation between chemical structure and potential energy without relying on a preconceived notion of fixed chemical bonds or knowledge about the relevant interactions. Such universal ML approximations are in principle only limited by the quality and quantity of the reference data used to train them. This review gives an overview of applications of ML-FFs and the chemical insights that can be obtained from them. The core concepts underlying ML-FFs are described in detail and a step-by-step guide for constructing and testing them from scratch is given. The text concludes with a discussion of the challenges that remain to be overcome by the next generation of ML-FFs.
Heimdal Sandstones within the PL203 Area, Norwegian North Sea core displays
Creators: name: R. FITZSIMMONS
name: D. VEIBERG
name: T. KRÅKENES
Publisher: name: Geological Society of London
Year: 2020
Subjects: subject: Geology
subject: FOS: Earth and related environmental sciences

description: well, seismic and fluid response. The cored interval traversed the gas and oil legs, in what appeared from the electronic logs to be a dominantly massive sandstone succession. Unfortunately, from the e-logs, the oil leg appeared to be developed within a fine-grained interval. From core description and interpretation, facies within the T57 sequence comprised a linked suite of high-density sandy turbidites/debrites (Facies T1) interbedded with low density turbidites (Facies T2). These units were deposited within a linear fairway, the edges of which were controlled by the depositional topography associated with the previous T55 sequence. Although linear and focused, no true channel facies were developed, with the fairway being more depositional than bypass dominated. This interpretation is key in understanding the lateral persistence of the finer grained interval within the oil leg. It is thought that these units are not persistent sheets but spatially restricted lenses, and as such will not prove to have a major affect on volumetrics or reservoir performance.
Homothetic packings of centrally symmetric convex bodies
Creators: name: Dewar, Sean
Publisher: name: arXiv
Year: 2020
Subjects: subject: Metric Geometry (math.MG)
subject: FOS: Mathematics
subject: 52C25 (Primary) 52C15, 52A10 (Secondary)

description: A centrally symmetric convex body is a convex compact set with non-empty interior that is symmetric about the origin. Of particular interest are those that are both smooth and strictly convex -- known here as regular symmetric bodies -- since they retain many of the useful properties of the $d$-dimensional Euclidean ball. We prove that for any given regular symmetric body $C$, a homothetic packing of copies of $C$ with randomly chosen radii will have a $(2,2)$-sparse planar contact graph. We further prove that there exists a comeagre set of centrally symmetric convex bodies $C$ where any $(2,2)$-sparse planar graph can be realised as the contact graph of a stress-free homothetic packing of $C$.
description: 28 pages, 2 figures
El efecto multiplicador de Ballestero en la Valoración Agraria
Creators: name: Serrano, A.
name: Alarcon, S.
name: Serrano, A.
name: Alarcon, S.
Publisher: name: Unknown
Year: 2015
Subjects: subject: Teaching/Communication/Extension/Profession
subject: Valoración Agraria

description: Varias publicaciones de Ballestero al principio de la década de los setenta del pasado siglo son el punto de partida de una importante transformación en la Valoración Agraria. Las aportaciones de Ballestero se pueden resumir en tres grandes líneas: (i) Revisión crítica y aportaciones al conocimiento del mercado de fincas, (ii) incorporación de la valoración subjetiva-objetiva, propias de la valoración de empresas desarrolladas por la escuela alemana, a la valoración de fincas, y (iii) reformulación de los métodos clásicos de valoración (analíticos y sintéticos) buscando conexiones con los métodos estadísticos y elaborando nuevas técnicas como la comparación de las funciones de distribución.
description: Forum
Fast Construction of Nets in Low Dimensional Metrics, and Their Applications
Creators: name: Har-Peled, Sariel
name: Mendel, Manor
Publisher: name: arXiv
Year: 2004
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: Computational Geometry (cs.CG)
subject: FOS: Computer and information sciences

description: We present a near linear time algorithm for constructing hierarchical nets in finite metric spaces with constant doubling dimension. This data-structure is then applied to obtain improved algorithms for the following problems: Approximate nearest neighbor search, well-separated pair decomposition, compact representation scheme, doubling measure, and computation of the (approximate) Lipschitz constant of a function. In all cases, the running (preprocessing) time is near-linear and the space being used is linear.
description: 41 pages. Extensive clean-up of minor English errors
An equation of Monge-Ampere type in conformal geometry, and four-manifolds of positive Ricci curvature
Creators: name: Chang, Sun-Yung A.
name: Gursky, Matthew J.
name: Yang, Paul C.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Differential Geometry (math.DG)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We formulate natural conformally invariant conditions on a 4-manifold for the existence of a metric whose Schouten tensor satisfies a quadratic inequality. This inequality implies that the eigenvalues of the Ricci tensor are positively pinched.
description: 79 pages, published version
Kontinuitäten und Diskontinuitäten im Zusammenspiel von Praxis, Forschung, Praxisforschung, Bildung und Lehrer*innenbildung angesichts eines Praxistrends der Forschungsförderung
Creators: name: Heinrich, Martin
name: Klewin, Gabriele
name: Streblow, Lilian
Publisher: name: PraxisForschungLehrer*innenBildung. Zeitschrift für Schul- und Professionsentwicklung.
Year: 2021

description: Im hiermit vorliegenden Editorial zur dritten Ausgabe der Zeitschrift erläutern die Herausgeber*innen, wie in diesem Jahrgang die Intentionen und Grundgedanken mit Blick auf das Verhältnis von Praxis und Forschung realisiert werden konnten. Im Anschluss an den Ausblick finden sich am Ende des Editorials auch die Abstracts aller Beiträge der diesjährigen regulären Ausgabe sowie kurze Überblicke zu den Inhalten der diesjährigen Themenhefte.
description: PraxisForschungLehrer*innenBildung. Zeitschrift für Schul- und Professionsentwicklung., Bd. 3 Nr. 1 (2021): PraxisForschungLehrer*innenBildung – Ausgabe 3
Higher Spins and Stringy AdS5xS5
Creators: name: Bianchi, Massimo
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this lecture I review recent work on higher spin holography. After a notational flash on the AdS/CFT correspondence, I will discuss HS symmetry enhancement and derive the spectrum of perturbative type IIB superstring excitations on AdS5 in this limit. I will then successfully compare it with the free N=4 SYM spectrum obtained by means of Polya theory. Decomposing the spectrum in HS multiplets, I will eventually sketch how ``La Grande Bouffe'' can be formulated a` la Stueckelberg.
description: 40 pages, Latex, uses youngtab.sty. Lecture delivered at the RTN Workshop "The quantum structure of spacetime and the geometric nature of fundamental interactions", EXT Workshop "Fundamental Interactions and the Structure of Spacetime" in Kolymbari, Crete, 5-10 September 2004
Soft graviton exchange and the information paradox
Creators: name: Gaddam, Nava
name: Groenenboom, Nico
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We show that there is a remarkable phase in quantum gravity where gravitational scattering amplitudes mediated by virtual gravitons can be calculated explicitly in effective field theory, when the impact parameter $b$ satisfies $L_{Pl}\ll b \lesssim R_S$, with $R_S$ being the Schwarzschild radius. This phase captures collisions with energies satisfying $\sqrt{s}\gg γM_{Pl}$ (with $γ\sim M_{Pl}/M_{BH}$) near the horizon. We call this the black hole eikonal phase, in contrast to its flat space analogue where collisions are trans-Planckian. Hawking's geometric optics approximation neglects gravitational interactions near the horizon, and results in thermal occupation numbers in the Bogoliubov coefficients. We show that these interactions are mediated by graviton exchange in $2 \rightarrow 2$ scattering near the horizon, and explicitly calculate the S-matrix non-perturbatively in $M_{Pl}/M_{BH}$. This involves a re-summation of infinitely many ladder diagrams near the horizon, all mediated by virtual soft gravitons. The S-matrix turns out to be a pure phase upon this re-summation and is agnostic of Planckian physics and any specific ultraviolet completion. In contrast to the flat space eikonal limit, the black hole eikonal phase captures collisions of extremely low energy near the horizon.
description: 54 pages + Appendices; v3: typos corrected, references added; v4: corrected eqns 4.81 and 4.83 v5: Published version
Some uses of economics
Creators: name: WALLICH, H.C.
Publisher: name: PSL Quarterly Review
Year: 2013
Subjects: subject: Henry C. Wallich, biography, recollections
subject: B31

description: The paper is a contribution to a series of recollections and reflections on the professional experiences of distinguished economists which the Banca Nazionale del Lavoro Quarterly Review started in 1979. In it Henry C. Wallich recounts his life and career in economics. JEL: B31
description: PSL Quarterly Review, V. 35, N. 141 (1982)
Modeling of Closure Phase Measurements with AMBER/VLTI - Towards Characterization of Exoplanetary Atmospheres
Creators: name: Joergens, Viki
name: Quirrenbach, Andreas
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Differential phase observations with a near-IR interferometer offer a way to obtain spectra of extrasolar planets. The method makes use of the wavelength dependence of the interferometer phase of the planet/star system, which depends both on the interferometer geometry and on the brightness ratio between the planet and the star. The differential phase is strongly affected by instrumental and atmospheric dispersion effects. Difficulties in calibrating these effects might prevent the application of the differential phase method to systems with a very high contrast, such as extrasolar planets. A promising alternative is the use of spectrally resolved closure phases, which are immune to many of the systematic and random errors affecting the single-baseline phases. We have modeled the response of the AMBER instrument at the VLTI to realistic models of known extrasolar planetary systems, taking into account their theoretical spectra as well as the geometry of the VLTI. We present a strategy to determine the geometry of the planetary system and the spectrum of the extrasolar planet from closure phase observations in two steps. We show that there is a close relation between the nulls in the closure phase and the nulls in the corresponding single-baseline phases: every second null of a single-baseline phase is also a null in the closure phase. In particular, the nulls in the closure phase do not depend on the spectrum but only on the geometry. Therefore the geometry of the system can be determined by measuring the nulls in the closure phase, and braking the remaining ambiguity due to the unknown system orientation by means of observations at different hour angles. Based on the known geometry, the planet spectrum can then be directly synthesized from the closure phases.
description: replaced version with corrected Fig.5; 9 pages, 6 figures, Proceeding of the SPIE conference, Glasgow, 2004, Proc. SPIE 5491, in press
Observers of quantum systems cannot agree to disagree
Creators: name: Contreras-Tejada, Patricia
name: Scarpa, Giannicola
name: Kubicki, Aleksander M.
name: Brandenburger, Adam
name: La Mura, Pierfranceso
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Is the world quantum? An active research line in quantum foundations is devoted to exploring what constraints can rule out the postquantum theories that are consistent with experimentally observed results. We explore this question in the context of epistemics, and ask whether agreement between observers can serve as a physical principle that must hold for any theory of the world. Aumann's seminal Agreement Theorem states that two observers (of classical systems) cannot agree to disagree. We propose an extension of this theorem to no-signaling settings. In particular, we establish an Agreement Theorem for observers of quantum systems, while we construct examples of (postquantum) no-signaling boxes where observers can agree to disagree. The PR box is an extremal instance of this phenomenon. These results make it plausible that agreement between observers might be a physical principle, while they also establish links between the fields of epistemics and quantum information that seem worthy of further exploration.
description: Close to published version
Nota sobre valor, coste y renta del agua de riego
Creators: name: Berbel, J.
name: Berbel, J.
Publisher: name: Unknown
Year: 2015
Subjects: subject: Resource /Energy Economics and Policy
subject: Teaching/Communication/Extension/Profession
subject: Economía del agua
subject: regadío
subject: renta del recurso
subject: valoración de recursos naturales

description: El propósito de esta nota es rendir homenaje al profesor Ballestero mediante un breve repaso a conceptos económicos estrechamente relacionados con su contribución a la ciencia económica en general y a la economía agraria en particular. En esta nota se repasan conceptos clave en la economía del agua que están en el centro del debate público y político y a los que el profesor Ballestero ha contribuido de manera fundamental.
description: Forum
Current account deficit, foreign borrowing, and monetary policy: the Italian experience
Creators: name: SARCINELLI, M.
Publisher: name: PSL Quarterly Review
Year: 2013
Subjects: subject: Italy, balance of payments, readjustment, foreign exchange risk, monetary policy
subject: F32, E52

description: The work reviews the stormy evolution of current accounts in the Italian balance of payments and the ways and timing by which equilibrium has been, or is in the course of being, restored. An international comparison finds that Italy is not alone in its effort to finance a process of readjustment, however, it is more seriously exposed because of the relative size of the debt and concentration of the foreign exchange risk. Thus far, adjustment has been pursued thanks to the combined operation of the depreciation of the currency on the exchange market and the restriction of demand. JEL: F32, E52
description: PSL Quarterly Review, V. 35, N. 141 (1982)
Deformation of p-adic String Amplitudes in a Magnetic Field
Creators: name: Grange, Pascal
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: A new term in the p-adic world-sheet action is proposed, which couples a constant B-field to the boundary of the world-sheet at disk level. The induced deformation of tachyon scattering amplitudes by star-products is derived. This is in agreement with the deformation of effective action postulated in recent investigations of noncommutative solitons in p-adic string theory.
description: 6 pages, LaTeX; note and references added
Section: Advanced Composites and Applications (11th February, 2025, Riga, Latvia) : Book of Abstracts
Creators: name: Tatjana, Glaskova-Kuzmina
Publisher: name: Zenodo
Year: 2025

description: The Institute for Mechanics of Materials of the University of Latvia (LU MMI) organised the session' Advanced Composites and Applications' on February 11, 2025 as a part of the annual 83rd scientific conference of the University of Latvia. The official language of the section was English. The duration of the presentation was 10 minutes.

The section was devoted to the discussion of the recent results within the following topics: 

-structure and properties of polymers and polymer-based composites; 

-long-term properties, creep, and environmental ageing; 

-composites for advanced applications; 

-mechanical aspects of technology;

-multifunctional properties.
Functional Model Library of the Environmental Control Systems (FLECS) : physical description
Creators: name: Müller, Christian
name: Scholz, Dieter
Publisher: name: HAW Hamburg
Year: 2008
Subjects: subject: aircraft
subject: system
subject: air conditioning
subject: ECS
subject: cabin
subject: simulation
subject: model library
subject: MATLAB
subject: Simulink
subject: Flugzeug
subject: Klimaanlage
subject: Kabine
subject: Modellbibliothek
subject: FLECS
subject: 620: Ingenieurwissenschaften

description: The task of the FLECS project is the development of a database for the Environmental Control System (ECS). Each component of the ECS is related to one model block. In general the description of the ECS is correlated to the description of an air/gas distribution network. The model blocks correspond to a physical model. The inner structure of the models is built up as universal as possible considering thermodynamic and fluid mechanic basics. Generalized volume elements consider water vapor, CO2 content and free water, condensation and evaporation processes, incompressible and compressible flow conditions. Further elements: Nodes, heat transfer elements, steady state and dynamical heat exchangers, specialized flow resistances like compressors and turbines, vapor compression cycle systems.
Super-resolution Method for Coherent DOA Estimation of Multiple Wideband Sources
Creators: name: Jirhandeh, Milad Javadzadeh
name: Kahaei, Mohammad Hossein
Publisher: name: arXiv
Year: 2021
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: We focus on coherent direction of arrival estimation of wideband sources based on spatial sparsity. This area of research is encountered in many applications such as passive radar, sonar, mining, and communication problems, in which an increasing attention has been devoted to improving the estimation accuracy and robustness to noise. By the development of super-resolution algorithms, narrowband direction of arrival estimation based on gridless sparse algorithms and atomic norm minimization has already been addressed. In this paper, a superresolution based method is proposed for coherent direction of arrival estimation of multiple wideband sources. First, unlike the conventional coherent methods, we develop a new focusing method to map the subband with the largest center frequency to the other ones, which leads to an accurate method with no requirement for initial estimates for DOAs. Then, we introduce an atomic norm problem by defining a new set of atoms and exploiting the signal joint sparsity of different frequency subbands in a continuous spatial domain. This problem is then cast as a semidefinite program, which leads to implementing a new coherent direction of arrival estimation method with higher resolution and more robustness to noise. Our method needs only one single snapshot for each frequency subband, leading to a small number of snapshots for the received wideband signal compared to the other coherent DOA techniques. Numerical simulations show the outperformance of the proposed method compared to the conventional ones.
Functional Model Library of the Environmental Control System (FLECS) : application
Creators: name: Müller, Christian
name: Scholz, Dieter
Publisher: name: HAW Hamburg
Year: 2008
Subjects: subject: aircraft
subject: system
subject: air conditioning
subject: ECS
subject: cabin
subject: simulation
subject: model library
subject: MATLAB
subject: Simulink
subject: Flugzeug
subject: Klimaanlage
subject: Kabine
subject: Modellbibliothek
subject: 620: Ingenieurwissenschaften

description: The basis for this Technical Note (TN) are the physical descriptions of the MATLAB/Simulink Functional Model Library of the Environmental Control System – FLECS (see FLECS_WT3.1_3.3_3.4_TN, https://doi.org/10.48441/4427.2052). In this TN, larger units (pack, cabin, controller, vapor compression cycle system) of the Environmental Control System (ECS) are constructed from the elementary components. Finally, the complete ECS of a passenger aircraft is modeled. The various basic air conditioning systems that were built with FLECS are tested for stability and real-time capability. In addition, various system configurations are validated using measurement data from aircraft or examples from the literature.
Covariance matrix filtering with bootstrapped hierarchies
Creators: name: Bongiorno, Christian
name: Challet, Damien
Publisher: name: arXiv
Year: 2020
Subjects: subject: Risk Management (q-fin.RM)
subject: Statistical Finance (q-fin.ST)
subject: Methodology (stat.ME)
subject: FOS: Economics and business
subject: FOS: Computer and information sciences

description: Statistical inference of the dependence between objects often relies on covariance matrices. Unless the number of features (e.g. data points) is much larger than the number of objects, covariance matrix cleaning is necessary to reduce estimation noise. We propose a method that is robust yet flexible enough to account for fine details of the structure covariance matrix. Robustness comes from using a hierarchical ansatz and dependence averaging between clusters; flexibility comes from a bootstrap procedure. This method finds several possible hierarchical structures in DNA microarray gene expression data, and leads to lower realized risk in global minimum variance portfolios than current filtering methods when the number of data points is relatively small.
description: 10 pages, 9 figures
Inconsistency in theories of violent-relaxation
Creators: name: Arad, I.
name: Lynden-Bell, D.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We examine an inconsistency in theories of violent-relaxation by Lynden-Bell and Nakamura. The inconsistency arises from the non-transitive nature of these theories: a system that under goes a violent-relaxation, relaxes and then upon an addition of energy, undergoes violent-relaxation once again would settle in an equilibrium state that is different from the one that is predicted had the system would go directly from the initial to the final states. We conclude that a proper description of the violent-relaxation process cannot be achieved by equilibrium statistical mechanics approach, but instead a dynamical theory for the coarse-grained phase-space density is needed.
description: 11 pages, 8 figures, submitted to MNRAS
The labour market and inflation in transitional growth: lessons from the Italian experience
Creators: name: PETTENATI, P.
Publisher: name: PSL Quarterly Review
Year: 2013
Subjects: subject: Italy, later developed countries, growth, labour, inflation
subject: J01, E31, O33

description: The paper argues that in later-developing countries that have chosen an export-led growth strategy, such as Italy, growth is likely to be sped up in the initial stage when technology provides an increase in labor productivity to counterbalance the rise in money wages. As the stage of ‘unlimited supply of labour’ comes to an end, however, the imitation of international wage levels spreads and increasing inflationary tendencies appear. At the same time, the implementation of welfare systems inflates government expenditures and deficits, thus lowering the national propensity to save and the ‘warranted’ rate of growth. A model of inflation for late-developing countries in employed to develop this argument. JEL: J01, E31, O33
description: PSL Quarterly Review, V. 35, N. 141 (1982)
Transition (LINER/HII) nuclei as evolved Composite (Seyfert 2/Starburst) nuclei
Creators: name: Storchi-Bergmann, Thaisa
name: Brandt, C. H.
name: Fernandes, R. Cid
name: Schmitt, H. R.
name: Delgado, R. Gonzalez
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We compare the circumnuclear stellar population and environmental properies of Seyfert and Composite (Seyfert + Starburst) nuclei with those of LINERs and LINER/HII transition galaxies (TOs), and discuss evidences for evolution from Seyfert/Composite to LINER/TO nuclei.
description: 2 pages, 1 figure; to appear in the Proceedings of IAU Symp. No. 222: The Interplay among Black Holes, Stars and ISM in Galactic Nuclei, CUP, eds. T. Storchi-Bergmann, L. Ho and H. R. Schmitt
Monetarism and fixed rules in H.C. Simons
Creators: name: TONVERONACHI, M.
Publisher: name: PSL Quarterly Review
Year: 2013
Subjects: subject: H.C. Simons, Friedman, Keynes, Monetarism, fixed rules, discretionary policy
subject: B22, B31

description: The comparison of H.C. Simons’ theories to those of Friedman and Keynes has resulted in confining the former to some of the issues debated in the recent controversies between the monetarist and the Keynesian schools. The present article demonstrates that a more balanced analysis of Simons’ theories can modify some of the outcomes obtained. In particular, the author gives less importance to differences in monetary theory while placing more weight on those of a pre-analytic and general theoretical nature. This distinction is of use when it comes to a question which drives a deep gulf between modern monetarists and Keynesians - that of the choice between fixed rules and discretionary policies. JEL: B22, B31
description: PSL Quarterly Review, V. 35, N. 141 (1982)
The distribution of national income by factor shares in the E.E.C. countries
Creators: name: GIANNONE, A.
Publisher: name: PSL Quarterly Review
Year: 2013
Subjects: subject: Distribution of income, capital, labor, growth, production
subject: E25

description: The literature on the functional distribution of income in postwar years is vast, with economists and statisticians attributing great importance to the topic. The author argues that this is because the division of income between capital and labor has a decisive influence on the growth rate of production. In the first section, the distribution of gross product and national income are analysed. Later, the labor income is dealt with. Finally, the average compensation for employees is considered, in and for itself and in relation to other variables in the economic system. JEL: E25
description: PSL Quarterly Review, V. 35, N. 141 (1982)
IHC@BCNPilotStudy
Creators: name: García, Laura Martínez
Publisher: name: figshare
Year: 2020
Subjects: subject: 111799 Public Health and Health Services not elsewhere classified
subject: FOS: Health sciences

description: StudyLearning to make informed health choices: Protocol for a pilot study in schools in Barcelona
 Extended dataExtended data 1 - Information for families and teachersExtended data 2 - Informed consent form for familiesExtended data 3 - Informed consent form for teachersExtended data 4 - Description of the Intervention in the schools using TIDieR checklistExtended data 5 - Workshop with the teachersExtended data 6 - Questionnaire for the assessment of the IHC resources by the teachers before the lessonsExtended data 7 - Questionnaire for the non-participatory observations during the lessonsExtended data 8 - Guide for the semi-structured interviews with the students after a lessonExtended data 9 - Questionnaire for the assessment of the lessons by the teachers after a lessonExtended data 10 - Questionnaire for the assessment of the IHC resources by the teachers at the end of the lessons
Deterministic event-based simulation of quantum interference
Creators: name: De Raedt, K.
name: De Raedt, H.
name: Michielsen, K.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose and analyse simple deterministic algorithms that can be used to construct machines that have primitive learning capabilities. We demonstrate that locally connected networks of these machines can be used to perform blind classification on an event-by-event basis, without storing the information of the individual events. We also demonstrate that properly designed networks of these machines exhibit behavior that is usually only attributed to quantum systems. We present networks that simulate quantum interference on an event-by-event basis. In particular we show that by using simple geometry and the learning capabilities of the machines it becomes possible to simulate single-photon interference in a Mach-Zehnder interferometer. The interference pattern generated by the network of deterministic learning machines is in perfect agreement with the quantum theoretical result for the single-photon Mach-Zehnder interferometer. To illustrate that networks of these machines are indeed capable of simulating quantum interference we simulate, event-by-event, a setup involving two chained Mach-Zehnder interferometers. We show that also in this case the simulation results agree with quantum theory.
description: Additional material: http://www.compphys.net/dlm
Evolutionary automata for visual resource management planning and harvest design
Creators: name: Chamberlain, Brent Charles
Publisher: name: University of British Columbia
Year: 2011

description: Increasing pressure to harvest in scenic vistas as a result of increased timber demand has caused significant changes to many beautiful natural scenes. Visual Resource Management aims to reduce the impact of harvests and improve their scenic design while trying to minimize the effect on timber availability. This thesis focuses on two main outcomes. First, a program was created that is capable of automating aspects of the design process in Visual Resource Management. The program, or Model, uses a modified genetic algorithm in combination with a geographical information system to create a final harvest plan that minimizes negative visual impacts for any given timber extraction level. The Model was tested across an array of different landscape terrain, including mountains, hills and valleys, to show its ability to deal with complex situations. Second, the thesis was created to better understand the relationship between timber availability and visible alteration. Results suggest a capacity for increased levels of aesthetic design while also increasing timber availability when compared with previous studies. Thus, the end product is a program that is capable of being adapted to real world situations by aiding in the harvest design process and producing a plan that tries to maximize both timber availability and the aesthetic properties of a landscape. This decision support tools allows planners to manipulate "what if” scenarios to ascertain the effects of varying timber extraction levels and visible alteration percentages.