cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Some properties of Wigner $3j$ coefficients: non-trivial zeros and connections to hypergeometric functions
Creators: name: Pain, Jean-Christophe
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The contribution of Jacques Raynal to angular-momentum theory is highly valuable. In the present article, I intend to recall the main aspects of his work related to Wigner $3j$ symbols. It is well known that the latter can be expressed with a hypergeometric series. The polynomial zeros of the $3j$ coefficients were initially characterized by the number of terms of the series minus one, which is the degree of the coefficient. A detailed study of the zeros of the $3j$ coefficient with respect to the degree $n$ for $J = a + b + c \leq 240$ ($a$, $b$ and $c$ being the angular momenta in the first line of the $3j$ symbol) by Raynal revealed that most zeros of high degree had small magnetic quantum numbers. This led him to define the order $m$ to improve the classification of the zeros of the $3j$ coefficient. Raynal did a search for the polynomial zeros of degree 1 to 7 and found that the number of zeros of degree 1 and 2 are infinite, though the number of zeros of degree larger than 3 decreases very quickly as the degree increases. Based on Whipple's transformations of hypergeometric $_3F_2$ functions with unit argument, Raynal generalized the Wigner $3j$ symbols to any arguments and pointed out that there are twelve sets of ten formulas (twelve sets of 120 generalized $3j$ symbols) which are equivalent in the usual case. In this paper, we also discuss other aspects of the zeros of $3j$ coefficients, such as the role of Diophantine equations and powerful numbers, or the alternative approach involving Labarthe patterns.
description: submitted to Eur. Phys. J. A
Classifying singularities up to analytic extensions of scalars
Creators: name: Schoutens, Hans
Publisher: name: arXiv
Year: 2005
Subjects: subject: Commutative Algebra (math.AC)
subject: Algebraic Geometry (math.AG)
subject: Logic (math.LO)
subject: FOS: Mathematics
subject: 13B40, 14B07, 03C20, 54H05

description: The singularity space consists of all germs $(X,x)$, with $X$ a Noetherian scheme and $x$ a point, where we identify two such germs if they become the same after an analytic extension of scalars. This is a Polish space for the metric given by the order to which infinitesimal neighborhoods, or jets, agree after base change. In other words, the classification of singularities up to analytic extensions of scalars is a smooth problem in the sense of descriptive set-theory. Over $\mathbb C$, the following two classification problems up to isomorphism are now smooth: (i) analytic germs; and (ii) polarized schemes.
description: additional classification problems added
Rationality of U.S. Department of Agriculture Livestock Price Forecasts: A Unified Approach
Creators: name: Sanders, Dwight R.
name: Manfredo, Mark R.
name: Sanders, Dwight R.
name: Manfredo, Mark R.
Publisher: name: Unknown
Year: 2007
Subjects: subject: Livestock Production/Industries
subject: forecast evaluation
subject: livestock prices
subject: rationality

description: This research presents a systematic and unified approach to evaluating forecast rationality that considers the potential of nonstationarity in forecasts and realized values. The approach is applied to one-quarter ahead U.S. Department of Agriculture livestock price forecasts from 1982 through 2004. Results show that forecasts and realized prices are integrated of the same order, and those that are nonstationary are cointegrated. However, the stationary price forecasts for hogs, turkeys, eggs, and milk are biased and improperly scaled, and forecast errors tend to be repeated. Similarly, nonstationary forecasts for cattle and broilers are also biased and irrational in the long run, but short-run dynamics are rational.
Transcription of the narration of Reel #2 (collection LA 256)
Creators: name: Parker, Verdena
name: Kelly, Christine
name: Spence, Justin
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2020
Subjects: subject: hup

description: Audio files VP-160417-05a/c/e/g: transcription of VP-180317-06 (narration of Reel #2 from the LA 256 collection at SCOIL, one of six reels of 8mm film created by Verdena in the 1960s, featuring scenes of everyday life around Hoopa Valley as well as Brush Dances), from 13:24 to end. Due to re-numbering, Reel #2 has been assigned the CLA item number LA 256.041.
Making the world market price endogenous within the AGMEMOD modelling framework: an econometric solution
Creators: name: Listorti, Giulia
name: Esposti, Roberto
name: Listorti, Giulia
name: Esposti, Roberto
Publisher: name: Unknown
Year: 2008
Subjects: subject: Demand and Price Analysis
subject: Research Methods/ Statistical Methods
subject: Price Formation and Transmission
subject: Commodity Market Models
subject: VECM

description: This paper aims at making the world price endogenous within the AGMEMOD modelling approach. This approach constructs country-level commodity market models where supply and demand sides are equalized on the basis of the observed domestic prices. These prices are endogenous as they depend (price transmission equation) on a EU key-price, which is, in turn, endogenously determined by the world price (price formation equation). The world prices, however, are assumed to be exogenous. To make the world price endogenous, we propose a system of equations where the EU key-price and the world price are simultaneously determined. This system of equations, written in a dynamic and error-correction form (VECM), substitutes the usual price-formation equation, while price transmission across EU countries remains unaffected. This approach is here applied to the case of soft wheat and results compared to those obtained by using the conventional AGMEMOD approach.
Conformal partial waves in momentum space
Creators: name: Gillioz, Marc
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The decomposition of 4-point correlation functions into conformal partial waves is a central tool in the study of conformal field theory. We compute these partial waves for scalar operators in Minkowski momentum space, and find a closed-form result valid in arbitrary space-time dimension $d \geq 3$ (including non-integer $d$). Each conformal partial wave is expressed as a sum over ordinary spin partial waves, and the coefficients of this sum factorize into a product of vertex functions that only depend on the conformal data of the incoming, respectively outgoing operators. As a simple example, we apply this conformal partial wave decomposition to the scalar box integral in $d = 4$ dimensions.
description: 39 pages, 3 figures. v2: typos corrected and references added; v3: discussion improved, technical appendix added, results unchanged. Submitted to SciPost Physics
EVALUATING THE POTENTIAL CONTRIBUTION OF CONTRACT AUCTIONS TO AEP'S EFFICIENCY
Creators: name: Gallerani, Vittorio
name: Raggi, Meri
name: Viaggi, Davide
name: Gallerani, Vittorio
name: Raggi, Meri
name: Viaggi, Davide
Publisher: name: Unknown
Year: 2008
Subjects: subject: Agricultural Finance
subject: Environmental Economics and Policy
subject: Auction
subject: Agri-Environmental Policy
subject: Information asymmetries.

description: Agri-Environmetal Policy (AEP) application raised a wide debate about the determination of payment levels and the efficiency of the economic instruments used. In particular, some aspects support the hypothesis of relevant rents due to an overcompensation of farmers� compliance costs. A policy tool suitable for improving the efficiency of AEP can be the adoption of auctions mechanisms in contract allocation. In theory, in an auction mechanism, the farmers have incentives to reveal their compliance costs, helping to reduce the information rents and increase cost-effectiveness. A crucial problem therefore arises from the uneven distribution of information between landowners and the public administration. Auctions mechanism can be useful in reducing opportunistic behavior that arises due to these information asymmetries. The aim of this work is to simulate the potential contribution of auctions mechanism to the efficiency of Agri-Environmental contracts in Emilia Romagna Region (Italy). The results give some indications about the efficiency of auction mechanism compared to other contract mechanism.
The a-axis optical conductivity of detwinned ortho-II YBa_2Cu_3O_6.50
Creators: name: Hwang, J.
name: Yang, J.
name: Timusk, T.
name: Sharapov, S. G.
name: Carbotte, J. P.
name: Bonn, D. A.
name: Liang, Ruixing
name: Hardy, W. N.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The a-axis optical properties of a detwinned single crystal of YBa_2Cu_3O_6.50 in the ortho II phase (Ortho II Y123, T_c= 59 K) were determined from reflectance data over a wide frequency range (70 - 42 000 cm^-1) for nine temperature values between 28 and 295 K. Above 200 K the spectra are dominated by a broad background of scattering that extends to 1 eV. Below 200 K a shoulder in the reflectance appears and signals the onset of scattering at 400 cm^-1. In this temperature range we also observe a peak in the optical conductivity at 177 cm^-1. Below 59 K, the superconducting transition temperature, the spectra change dramatically with the appearance of the superconducting condensate. Its spectral weight is consistent, to within experimental error, with the Ferrell-Glover-Tinkham (FGT) sum rule. We also compare our data with magnetic neutron scattering on samples from the same source that show a strong resonance at 31 meV. We find that the scattering rates can be modeled as the combined effect of the neutron resonance and a bosonic background in the presence of a density of states with a pseudogap. The model shows that the decreasing amplitude of the neutron resonance with temperature is compensated for by an increasing of the bosonic background yielding a net temperature independent scattering rate at high frequencies. This is in agreement with the experiments.
description: 13 pages 16 figures
Compressed Super-Resolution of Positive Sources
Creators: name: Da Costa, Maxime Ferreira
name: Chi, Yuejie
Publisher: name: arXiv
Year: 2020
Subjects: subject: Information Theory (cs.IT)
subject: Signal Processing (eess.SP)
subject: Optimization and Control (math.OC)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Mathematics

description: Atomic norm minimization is a convex optimization framework to recover point sources from a subset of their low-pass observations, or equivalently the underlying frequencies of a spectrally-sparse signal. When the amplitudes of the sources are positive, a positive atomic norm can be formulated, and exact recovery can be ensured without imposing a separation between the sources, as long as the number of observations is greater than the number of sources. However, the classic formulation of the atomic norm requires to solve a semidefinite program involving a linear matrix inequality of a size on the order of the signal dimension, which can be prohibitive. In this letter, we introduce a novel "compressed" semidefinite program, which involves a linear matrix inequality of a reduced dimension on the order of the number of sources. We guarantee the tightness of this program under certain conditions on the operator involved in the dimensionality reduction. Finally, we apply the proposed method to direction finding over sparse arrays based on second-order statistics and achieve significant computational savings.
Micro-simulation as a tool to assess policy concerning non-point source pollution: the case of ammonia in Dutch agriculture
Creators: name: Kruseman, Gideon
name: Blokland, Pieter-Willem
name: Bouma, Foppe
name: Luesink, Harry H.
name: Mokveld, Lennard J.
name: Vrolijk, Hans C.J.
name: Kruseman, Gideon
name: Blokland, Pieter-Willem
name: Bouma, Foppe
name: Luesink, Harry H.
name: Mokveld, Lennard J.
name: Vrolijk, Hans C.J.
Publisher: name: Unknown
Year: 2008
Subjects: subject: Environmental Economics and Policy
subject: Research Methods/ Statistical Methods
subject: micro-simulation
subject: spatial equilibrium model
subject: non-point source pollution

description: Non-point source pollution is notoriously difficult to assess. A relevant example is ammonia emissions in the Netherlands. Since the mid 1980s the Dutch government has sought to reduce emissions through a wide variety of measures, the effect of which in turn is monitored using modeling techniques. This paper presents the current generation of mineral emission models from agriculture based on micro-simulation of farms in combination with a spatial equilibrium model for the dispersion of manure from excess regions with high livestock intensities within the country to areas with low livestock intensities. The micro-simulation approach retains the richness in the heterogeneity of farm household decision making that are the core cause of the difficulty of assessing non-point source pollution, while using the best available data to track corresponding pollution. Examples are provided that illustrate the strengths of the modeling framework for both pollution monitoring and environmental policy scenario analyses.
Problems in resumming interjet energy flows with k_t clustering
Creators: name: Banfi, A.
name: Dasgupta, M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider the energy flow into gaps between hard jets. It was previously believed that the accuracy of resummed predictions for such observables can be improved by employing the $k_t$ clustering procedure to define the gap energy in terms of a sum of energies of soft jets (rather than individual hadrons) in the gap. This significantly reduces the sensitivity to correlated soft large-angle radiation (non-global leading logs), numerically calculable only in the large $N_c$ limit. While this is the case, as we demonstrate here, the use of $k_t$ clustering spoils the straightforward single-gluon Sudakov exponentiation that multiplies the non-global resummation. We carry out an ${\mathcal{O}}(α_s^2)$ calculation of the leading single-logarithmic terms and identify the piece that is omitted by straightforward exponentiation. We compare our results with the full ${\mathcal{O}} (α_s^2)$ result from the program EVENT2 to confirm our conclusions. For $e^{+}e^{-} \to 2$ jets and DIS (1+1) jets one can numerically resum these additional contributions as we show, but for dijet photoproduction and hadron-hadron processes further studies are needed.
description: 11 pages, 5 figures
Perturbative calculation of quasi-normal modes of AdS Schwarzschild black holes
Creators: name: Musiri, Suphot
name: Ness, Scott
name: Siopsis, George
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We calculate analytically quasi-normal modes of AdS Schwarzschild black holes including first-order corrections. We consider massive scalar, gravitational and electromagnetic perturbations. Our results are in good agreement with numerical calculations. In the case of electromagnetic perturbations, ours is the first calculation to provide an analytic expression for quasi-normal frequencies, because the effective potential vanishes at zeroth order. We show that the first-order correction is logarithmic.
description: 20 pages incl. 8 figures (using eepic and color)
Bargaining structures in French dairy sector and impact of policy reforms
Creators: name: Yu, Jianyu
name: Yu, Jianyu
Publisher: name: Unknown
Year: 2008
Subjects: subject: Agricultural and Food Policy
subject: Industrial Organization
subject: Livestock Production/Industries
subject: Bargaining structure
subject: CAP reform
subject: French dairy sector

description: The recent CAP reform to reduce gradually the intervention price of some industry products induces changes in both the raw milk price schemes and the bargaining structures in the French dairy sector. In this article, we develop a bargaining model to investigate the reason of current and potential changes. We find that the relative strongness of the downstream processors has great influence on the bargaining outcomes and the equilibrium bargaining structures. The policy reform changes the relative strongness of downstream processors and therefore, induces the change in the equilibrium price schemes and bargaining structures.
Trading Model with Pair Pattern Strategies
Creators: name: Ren, F.
name: Zhang, Y. -C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Portfolio Management (q-fin.PM)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Economics and business
subject: FOS: Physical sciences

description: A simple trading model based on pair pattern strategy space with holding periods is proposed. Power-law behaviors are observed for the return variance $σ^2$, the price impact $H$ and the predictability $K$ for both models with linear and square root impact functions. The sum of the traders' wealth displays a positive value for the model with square root price impact function, and a qualitative explanation is given based on the observation of the conditional excess demand $$. An evolutionary trading model is further proposed, and the elimination mechanism effectively changes the behavior of the traders highly performed in the model without evolution. The trading model with other types of traders, e.g., traders with the MG's strategies and producers, are also carefully studied.
description: 22 pages, 16 figures
Elicitation of verb paradigms
Creators: name: Parker, Verdena
name: Kelly, Christine
name: Spence, Justin
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2020
Subjects: subject: hup

description: Audio files VP-160417-03 and VP-160417-04: verb paradigm elicitation; progressive aspect (VP-160417-03) and follow-up questions related to verbs in VP-160417-03 (VP-160417-04).
Optimal Control in Pandemics
Creators: name: Samuel, Joseph
name: Sinha, Supurna
Publisher: name: arXiv
Year: 2020
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: FOS: Biological sciences

description: During a pandemic, there are conflicting demands arising from public health and economic cost. Lockdowns are a common way of containing infections, but they adversely affect the economy. We study the question of how to minimise the economic damage of a lockdown while still containing infections. Our analysis is based on the SIR model, which we analyse using a clock set by the virus. This use of the "virus time" permits a clean mathematical formulation of our problem. We optimise the economic cost for a fixed health cost and arrive at a strategy for navigating the pandemic. This involves adjusting the level of lockdowns in a controlled manner so as to minimise the economic cost.
description: 5 pages, 4 figures, revised in light of referee's comments, To appear as a Letter in PRE
Perturbative Search for Fixed Lines in Large N Gauge Theories
Creators: name: Dymarsky, A.
name: Klebanov, I. R.
name: Roiban, R.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The logarithmic running of marginal double-trace operators is a general feature of 4-d field theories containing scalar fields in the adjoint or bifundamental representation. Such operators provide leading contributions in the large N limit; therefore, the leading terms in their beta functions must vanish for a theory to be large N conformal. We calculate the one-loop beta functions in orbifolds of the N=4 SYM theory by a discrete subgroup Gamma of the SU(4) R-symmetry, which are dual to string theory on AdS_5 x S^5/Gamma. We present a general strategy for determining whether there is a fixed line passing through the origin of the coupling constant space. Then we study in detail some classes of non-supersymmetric orbifold theories, and emphasize the importance of decoupling the U(1) factors. Among our examples, which include orbifolds acting freely on the S^5, we do not find any large N non-supersymmetric theories with fixed lines passing through the origin. Connection of these results with closed string tachyon condensation in AdS_5 x S^5/Gamma is discussed.
description: 31 pages, 4 figures, latex v2: Clarifications and reference added
Black hole solutions with torsion
Creators: name: Culham, Shaun Andrew
Publisher: name: University of British Columbia
Year: 2009

description: Classical general relativity theory is torsion free. However, since general relativity and general relativity with torsion are experimentally indistinguishable at this time, it is important to explore the consequences of torsion through its physical effects. We do so by considering an important class of static spherically symmetric solutions, analogs of the Schwarzschild solutions which are at the foundation of most weak limit tests of General Relativity. We first show that in general spherically symmetric black holes with torsion exist; these are the torsion analogs of the Bowick et al. [30] black hole solutions with axionic charge. We next search for more general solutions with non-vanishing torsion field exterior to the black hole. We specialize to spherically symmetric static metrics and spherically symmetric static spatial torsion fields. We find that in certain cases such a solution exists; however falloff conditions on the torsion greatly restrict the form of these solutions.
WOMEN PHILOSOPHERS AS LEADERS, MENTORS, AUTHORS: THE CASE OF HUME SCHOLARSHIP
Creators: name: TAYLOR, JACQUELINE
Publisher: name: Dipartimento di Scienze Umane, Università di Ferrara
Year: 2015
Subjects: Women, Women Philosophers, Women Leaders, Women Authors

description: I discuss three issues:  first, a main problem:  the implicit biases that disadvantage women philosophers at nearly all stages of their careers as well as the phenomenon of stereotype that can lead women to underperform intellectually; second, the value of mentoring and sponsorship for strategically positioning women to eventually assume leadership roles in philosophy; and third, what women philosophers can do in leadership roles, in particular, including other women and helping to advance their careers.
description: I castelli di Yale online, volume III, numero 2, 2015
Static force potential of non-abelian gauge theory at a finite box in Coulomb gauge
Creators: name: Furukawa, Tomohiro
name: Ishibashi, Keiichi
name: Itoyama, H.
name: Kambayashi, Satoshi
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Force potential exerting between two classical static sources of pure non-abelian gauge theory in the Coulomb gauge is reconsidered at a periodic/twisted box of size $L^3$. Its perturbative behavior is examined by the short-distance expansion as well as by the derivative expansion. The latter expansion to one-loop order confirms the well-known change in the effective coupling constant at the Coulomb part as well as the Uehling potential while the former is given by the convolution of two Coulomb Green functions being non-singular at $\bm{x}=\bm{y}$. The effect of the twist comes in through its Green function of the sector.
description: 18 pages, minor changes made and section 5 added
THE FUTURE OF THE WORLD SUGAR MARKET--A SPATIAL PRICE EQUILIBRIUM ANALYSIS
Creators: name: Nolte, Stephan
name: Nolte, Stephan
Publisher: name: Unknown
Year: 2008
Subjects: subject: Crop Production/Industries
subject: International Relations/Trade
subject: Research Methods/ Statistical Methods
subject: Sugar
subject: Partial Equilibrium Model
subject: Spatial Price Equilibrium Model
subject: MCP

description: A spatial price equilibrium (SPE) model of the world sugar market is programmed. The model covers more than hundred regions and contains sugar in as a sole product. It has a detailed coverage of policies and bilateral trade agreements. It is programmed as a mixed complementarity problem (MCP) in GAMS and uses the PATH solver. The SPE framework offers considerable advantages over other model approaches applied to the sugar market before. Four scenarios are simulated: A baseline scenario until 2015/16, accounting for implementation of the EU reform and market access commitments already decided upon. The liberalization scenarios include an implementation of the Falconer proposal for the current round of WTO negotiations, a full liberalization by the EU and a liberalization of all sugar policies world-wide. In the latter the world market price increases by around 30%. Results are discussed and related to special properties of the SPE approach. Strengths and weaknesses are identified and an outlook on the further refinement of the analysis is given.
Otro dilema para las madres: alimentos o datos
Creators: name: Suing, Abel
Publisher: name: Zenodo
Year: 2021
Subjects: Mujer
Libertad
expresión
información
derecho
equidad
Internet
comunicación
educación
democracia

description: Publicación en la sección de opinión del diario digital hora 32 https://hora32.com.ec/ que se edita en Loja (Ecuador)
Statistical analysis of simple repeats in the human genome
Creators: name: Piazza, Francesco
name: Lio, Pietro
Publisher: name: arXiv
Year: 2005
Subjects: subject: Genomics (q-bio.GN)
subject: FOS: Biological sciences

description: The human genome contains repetitive DNA at different level of sequence length, number and dispersion. Highly repetitive DNA is particularly rich in homo-- and di--nucleotide repeats, while middle repetitive DNA is rich of families of interspersed, mobile elements hundreds of base pairs (bp) long, among which the Alu families. A link between homo- and di-polymeric tracts and mobile elements has been recently highlighted. In particular, the mobility of Alu repeats, which form 10% of the human genome, has been correlated with the length of poly(A) tracts located at one end of the Alu. These tracts have a rigid and non-bendable structure and have an inhibitory effect on nucleosomes, which normally compact the DNA. We performed a statistical analysis of the genome-wide distribution of lengths and inter--tract separations of poly(X) and poly(XY) tracts in the human genome. Our study shows that in humans the length distributions of these sequences reflect the dynamics of their expansion and DNA replication. By means of general tools from linguistics, we show that the latter play the role of highly-significant content-bearing terms in the DNA text. Furthermore, we find that such tracts are positioned in a non-random fashion, with an apparent periodicity of 150 bases. This allows us to extend the link between repetitive, highly mobile elements such as Alus and low-complexity words in human DNA. More precisely, we show that Alus are sources of poly(X) tracts, which in turn affect in a subtle way the combination and diversification of gene expression and the fixation of multigene families.
L'ARROSTO DI MAIALE. OVVERO: DEL SESSO E DEI FILOSOFI
Creators: name: BERNINI, LORENZO
Publisher: name: Dipartimento di Scienze Umane, Università di Ferrara
Year: 2015
Subjects: Filosofia politica, Teorie queer, Femminismo

description: Anne Dufourmantelle, and many other feminist scholars before her, claims that for about three thousands years philosophy and sex have been avoiding one another. According to her, in particular, philosophy blinded itself to the body, its passions, its drives in order to present itself as spiritual education, care of the soul and the intellect. On the contrary, the article aims to illustrate that at least two modern philosophers, Immanuel Kant and Thomas Hobbes, bumped into the uncanny light of the sexual, contemplated it with a certain revulsion, were dazzled by its disconcerting power, and did what they could in the useless effort to obscure it.
description: I castelli di Yale online, volume III, numero 2, 2015
Non-Gaussian low-frequency noise as a source of qubit decoherence
Creators: name: Galperin, Y. M.
name: Altshuler, B. L.
name: Bergli, J.
name: Shantsev, D. V.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We study decoherence in a qubit with the distance between the two levels affected by random flips of bistable fluctuators. For the case of a single fluctuator we evaluate explicitly an exact expression for the phase-memory decay in the echo experiment with a resonant ac excitation. The echo signal as a function of time shows a sequence of plateaus. The position and the height of the plateaus can be used to extract the fluctuator switching rate γand its coupling strength v. At small times the logarithm of the echo signal is proportional to t^3. The plateaus disappear when the decoherence is induced by many fluctuators. In this case the echo signal depends on the distribution of the fluctuators parameters. According to our analysis, the results significantly deviate from those obtained in the Gaussian model as soon as v greater than γ.
description: 4 pages, 2 figures
COME PRATICARE LA PARITÀ DI GENERE IN FILOSOFIA? ALCUNE PROPOSTE
Creators: name: TRIPODI, VERA
Publisher: name: Dipartimento di Scienze Umane, Università di Ferrara
Year: 2015
Subjects: Gender gap, Stereotype threat, Implicit bias, Women in philosophy, Gender Equality in Academia

description: Women are seriously under-represented in philosophy. Few women achieve high academic positions in philosophy faculties, and academic authorities often automatically consider men as the first candidates for posts of responsibility. How can we make gender equality a concrete reality? In this paper, I discuss how we can achieve equality between women and men in academia and I present simple things we could do to promote the full inclusion of women in careers in fields such as philosophy.
description: I castelli di Yale online, volume III, numero 2, 2015
KAPITALDECKUNG IN DER LANDWIRTSCHAFTLICHEN UNFALLVERSICHERUNG. FINANZIELLE FOLGEN EINER ABLOSUNG DES UMLAGEVERFAHRENS 2008 - 2036 (German)
Creators: name: Mehl, Peter
name: Mehl, Peter
Publisher: name: Unknown
Year: 2007
Subjects: subject: Unfallversicherung
subject: Kapitaldeckung
subject: Umlagefinanzierung

description: Untersucht werden die finanziellen Folgen einer Umstellung der Finanzierung der landwirtschaftlichen Unfallversicherung (LUV) von einer Umlagefinanzierung auf eine Kapitaldeckung (Rentenwertumlageverfahren). Der Vergleich der Finanzierungssysteme wird auf die Option einer jährlichen Ausfinanzierung künftiger neuer Dauerrenten bezogen und in verschiedenen Varianten (Rentenzugang, Rentendynamisierung, Realverzinsung sowie ein Rückgang des Rentenvolumens durch die geplante Reform der gesetzlichen Unfallversicherung) von 2008 bis 2036 berechnet. Alle Varianten zeigen, dass die Einführung eines Rentenwertumlageverfahrens kurz- und mittelfristig Mehraufwendungen verursacht und erst langfristig zu Einsparungen führt. Eine "Win-Win-Situation" für Beitragszahler und Bund durch Einführung einer Kapitaldeckung bei der Finanzierung der LUV ist daher nicht zu erwarten.
Interpretable Graph Capsule Networks for Object Recognition
Creators: name: Gu, Jindong
name: Tresp, Volker
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Capsule Networks, as alternatives to Convolutional Neural Networks, have been proposed to recognize objects from images. The current literature demonstrates many advantages of CapsNets over CNNs. However, how to create explanations for individual classifications of CapsNets has not been well explored. The widely used saliency methods are mainly proposed for explaining CNN-based classifications; they create saliency map explanations by combining activation values and the corresponding gradients, e.g., Grad-CAM. These saliency methods require a specific architecture of the underlying classifiers and cannot be trivially applied to CapsNets due to the iterative routing mechanism therein. To overcome the lack of interpretability, we can either propose new post-hoc interpretation methods for CapsNets or modifying the model to have build-in explanations. In this work, we explore the latter. Specifically, we propose interpretable Graph Capsule Networks (GraCapsNets), where we replace the routing part with a multi-head attention-based Graph Pooling approach. In the proposed model, individual classification explanations can be created effectively and efficiently. Our model also demonstrates some unexpected benefits, even though it replaces the fundamental part of CapsNets. Our GraCapsNets achieve better classification performance with fewer parameters and better adversarial robustness, when compared to CapsNets. Besides, GraCapsNets also keep other advantages of CapsNets, namely, disentangled representations and affine transformation robustness.
Giant Planet Migration through the Action of Disk Torques and Planet Scattering
Creators: name: Moorhead, Althea V.
name: Adams, Fred C.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: This paper presents a parametric study of giant planet migration through the combined action of disk torques and planet-planet scattering. The torques exerted on planets during Type II migration in circumstellar disks readily decrease the semi-major axes, whereas scattering between planets increases the orbital eccentricities. This paper presents a parametric exploration of the possible parameter space for this migration scenario using two (initial) planetary mass distributions and a range of values for the time scale of eccentricity damping (due to the disk). For each class of systems, many realizations of the simulations are performed in order to determine the distributions of the resulting orbital elements of the surviving planets; this paper presents the results of 8500 numerical experiments. Our goal is to study the physics of this particular migration mechanism and to test it against observations of extrasolar planets. The action of disk torques and planet-planet scattering results in a distribution of final orbital elements that fills the a-e plane, in rough agreement with the orbital elements of observed extrasolar planets. In addition to specifying the orbital elements, we characterize this migration mechanism by finding the percentages of ejected and accreted planets, the number of collisions, the dependence of outcomes on planetary masses, the time spent in 2:1 and 3:1 resonances, and the effects of the planetary IMF. We also determine the distribution of inclination angles of surviving planets and the distribution of ejection speeds for exiled planets.
description: 46 pages including 15 figures; accepted to ICARUS
Tire Force Estimation in Intelligent Tires Using Machine Learning
Creators: name: Xu, Nan
name: Askari, Hassan
name: Huang, Yanjun
name: Zhou, Jianfeng
name: Khajepour, Amir
Publisher: name: arXiv
Year: 2020
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: The concept of intelligent tires has drawn attention of researchers in the areas of autonomous driving, advanced vehicle control, and artificial intelligence. The focus of this paper is on intelligent tires and the application of machine learning techniques to tire force estimation. We present an intelligent tire system with a tri-axial acceleration sensor, which is installed onto the inner liner of the tire, and Neural Network techniques for real-time processing of the sensor data. The accelerometer is capable of measuring the acceleration in x,y, and z directions. When the accelerometer enters the tire contact patch, it starts generating signals until it fully leaves it. Simultaneously, by using MTS Flat-Trac test platform, tire actual forces are measured. Signals generated by the accelerometer and MTS Flat-Trac testing system are used for training three different machine learning techniques with the purpose of online prediction of tire forces. It is shown that the developed intelligent tire in conjunction with machine learning is effective in accurate prediction of tire forces under different driving conditions. The results presented in this work will open a new avenue of research in the area of intelligent tires, vehicle systems, and tire force estimation.
description: 10 pages,20 figures, Accepted for publication at IEEE Transactions on Intelligent Transportation Systems, the link of this work is https://ieeexplore.ieee.org/document/9284471
Frequency-dependent polarizabilities of alkali atoms from ultraviolet through infrared spectral regions
Creators: name: Safronova, M. S.
name: Arora, Bindiya
name: Clark, Charles W.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We present results of first-principles calculations of the frequency-dependent polarizabilities of all alkali atoms for light in the wavelength range 300-1600 nm, with particular attention to wavelengths of common infrared lasers. We parameterize our results so that they can be extended accurately to arbitrary wavelengths above 800 nm. This work is motivated by recent experiments involving simultaneous optical trapping of two different alkali species. Our data can be used to predict the oscillation frequencies of optically-trapped atoms, and particularly the ratios of frequencies of different species held in the same trap. We identify wavelengths at which two different alkali atoms have the same oscillation frequency.
description: 6 pages, 2 figures
สำนึกทางสังคมในกวีนิพนธ์ไทยในกระแสโลกสมัยใหม่
Creators: name: นิตยา แก้วคัลณา
Publisher: name: คณะศิลปศาสตร์ มหาวิทยาลัยธรรมศาสตร์
Year: 2016
Subjects: -

description: วรรณวิทัศน์, 16, พฤศจิกายน, 1-23
EINFLUSS STEIGENDER WELTAGRARPREISE AUF DIE WETTBEWERBSFAHIGKEIT DES ENERGIEMAISANBAUS IN DEUTSCHLAND (German)
Creators: name: Gomann, Horst
name: Kreins, Peter
name: Breuer, Thomas
name: Gomann, Horst
name: Kreins, Peter
name: Breuer, Thomas
Publisher: name: Unknown
Year: 2007
Subjects: subject: Resource /Energy Economics and Policy
subject: Erneuerbare-Energien-Gesetz - EEG
subject: Energiemais
subject: Agrarsektormodell
subject: Landnutzung.

description: Nicht zuletzt aufgrund der weltweit stark zunehmenden Nachfrage nach landwirtschaftlichen Rohstoffen zur Biokraftstoffherstellung wird mit einem starken Anstieg der Getreide- und Ölsaatenpreise gerechnet. In diesem Beitrag wurden die Auswirkungen steigender Getreidepreise auf die boomende Biogaserzeugung auf Basis Nachwachsender Rohstoffe in Deutschland mit Hilfe des regionalen Agrarsektormodells RAUMIS untersucht. Bei einem erwarteten Getreidepreisanstieg um 24 % geht die Gärsubstratproduktion gegenüber einer Referenzsituation, in der etwa 1,3 Mio. ha Energiemais angebaut werden, um rund 21 % zurück. Um eine gleich bleibende Gärsubstraterzeugung sicherzustellen, sind von Biogasanlagenbetreibern ca. 12 % höhere Auszahlungspreise für Energiemais zu zahlen. Die Kosten steigen in der Biogasbranche dadurch um rund 245 Mio. Euro, die wegen festgeschriebener EEG-Vergütungen nicht an Verbraucher weitergegeben werden können, sondern nur durch eine Prozessoptimierung kompensiert werden könnten.
ALCUNE BUONE RAGIONI PER INSEGNARE LA STORIA DELLA FILOSOFIA
Creators: name: ZANARDI, PAOLA
Publisher: name: Dipartimento di Scienze Umane, Università di Ferrara
Year: 2015
Subjects: Philosophy, History of philosophy, Teaching Philosophy, libraries

description: After long time spent in teaching the history of philosophy, I intend to show here some good reasons to support the classical (as opposed to the analytical) approach which, in my opinion, is still a fundamental moment in the intellectual education of the youth: both for the individual cognitive skills implemented by such intellectual exercise, and for the profitable connections that can be established with the places of collective knowledge, such as historical libraries.
description: I castelli di Yale online, volume III, numero 2, 2015
ABSCHATZUNG DES UNTERNEHMERISCHEN RISIKOS BEIM BETRIEB EINER BIOGASANLAGE MIT HILFE DER MONTECARLO-METHODE (German)
Creators: name: Rauh, Stefan
name: Berenz, Stefan
name: Heissenhuber, Alois
name: Rauh, Stefan
name: Berenz, Stefan
name: Heissenhuber, Alois
Publisher: name: Unknown
Year: 2007
Subjects: subject: Monte-Carlo-Simulation
subject: Risikoanalyse
subject: Wirtschaftlichkeit
subject: Biogas

description: Die Novellierung des Gesetzes für den Vorrang Erneuerbarer Energien (EEG) führte zu einem verstärkten Einstieg von Landwirten in die Biogasproduktion. Jedoch können die mit dem EEG verbundenen relativ hohen Vergütungssätze das vorhandene Investitionsrisiko in einer Biogasanlage nicht eliminieren. Es existiert eine gewisse Zahl an Einflussfaktoren, welche die Wirtschaftlichkeit nachhaltig beeinflussen. Eine Risikoanalyse mittels der Monte-Carlo- Methode zeigt den enormen Einfluss der Risikofaktoren auf die Varianz des Gewinns. Es wird dadurch deutlich, dass eine statische Planungsrechnung, welche Unsicherheit nicht berücksichtigt, oftmals zu einer Fehleinschätzung führen kann. Gleichzeitig gelingt es mit Hilfe einer Monte-Carlo-Simulation die größten Risikofaktoren bei der Biogasproduktion zu identifizieren.
Precision Measurement of PArity Violation in Polarized Cold Neutron Capture on the Proton: the NPDGamma Experiment
Creators: name: Bernhard, Lauss
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The NPDGamma experiment at the Los Alamos Neutron Science Center (LANSCE) is dedicated to measure with high precision the parity violating asymmetry in the $γ$ emission after capture of spin polarized cold neutrons in para-hydrogen. The measurement will determine unambiguously the weak pion-nucleon-nucleon ($πNN$) coupling constant {\it f$^1_π$}
description: Proceedings of the PANIC'05 Conference, Santa Fe, NM, USA, October 24-28, 2005, 3 pages, 2 figures
Compact body in a tidal environment: New types of relativistic Love numbers, and a post-Newtonian operational definition for tidally induced multipole moments
Creators: name: Poisson, Eric
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We examine the tidal deformation of a nonrotating compact body (material body or black hole) in general relativity. The body's exterior metric is calculated in a simultaneous expansion in powers of the ratio between the distance to the body and three distinct length scales: the radius of curvature of the external spacetime in which the body is inserted, the scale of spatial inhomogeneity of the curvature, and the scale of temporal variation. The metric is valid in the body's immediate neighborhood, which excludes the external matter responsible for the tidal environment. The body's tidal response is encapsulated in four types of relativistic Love numbers: $k_\ell$, the familiar Love number that measures the linear response to a static tidal field, $p_\ell$, which measures the quadratic response to the tidal field, $\dot{k}_\ell$ and $\ddot{k}_\ell$, associated with first and second time derivatives of the tidal field, respectively. The Love numbers acquire an operational meaning through the definition of tidally induced multipole moments. Previously proposed definitions for the moments suffer from ambiguities associated with the subtraction of a "pure tidal field" from the full metric. A robust operational definition is proposed here. It relies on inserting the body's local metric within a global metric constructed in post-Newtonian theory; the global metric includes the external matter responsible for the tidal environment. When viewed in the post-Newtonian spacetime, the compact body appears as a skeletonized object with a specific multipole structure. The tidally induced multipole moments provide a description of this structure. They manifest themselves, for example, in the body's tidal acceleration, which is nonlinear in the tidal field. At leading order in the tidal interaction, the acceleration is proportional to the $k_2$ Love number as calculated in full general relativity.
description: 62 pages, 1 figure. New appendix. This version matches the published article
KOSTEN-NUTZEN-ANALYSE FUR QUALITATSSICHERUNGS UND RUCKVERFOLGBARKEITSSYSTEME IN WERTSCHOPFUNGSKETTEN TIERISCHER PRODUKTE (German)
Creators: name: Roth, Michael
name: Doluschitz, Reiner
name: Roth, Michael
name: Doluschitz, Reiner
Publisher: name: Unknown
Year: 2007
Subjects: subject: Kosten-Nutzen-Analyse
subject: Rückverfolgbarkeit
subject: Qualitätssicherung

description: Gesetzgeber, Handel und insbesondere Verbraucher fordern vor dem Hintergrund aktueller Lebensmittelskandale unternehmensübergreifende Qualitätssicherungs- und Rückverfolgbarkeitssysteme. Den Unternehmen entstehen dadurch zusätzlicher Aufwand und Kosten, was eine zurückhaltende Akzeptanz entsprechender Systeme erwarten lässt. Bei den betroffenen Akteuren entlang der Wertschöpfungskette sind andererseits aber auch verteilte Nutzenaspekte gegeben, die schwer lokalisierbar und noch schwerer quantifizierbar sind. Der Quantifizierung dieser Nutzen und auch der Kosten von Rückverfolgbarkeitssystemen ist ein Teilprojekt des Forschungsverbunds IT FoodTrace gewidmet. Aussagen über die Wirtschaftlichkeit des IT FoodTrace Verbundes lassen sich aufgrund der erst kurzen Laufzeit (seit Juni 2006) vorab nur unter Vorbehalt treffen. Dies ist aber Voraussetzung für die Akzeptanz des Systems. Hier setzt das vorgestellte Forschungsvorhaben an. Erstes Teilziel ist die Ermittlung der Anspruchsgruppen und deren Nutzenaspekte. Diese Nutzenaspekte müssen - wo möglich - quantifiziert und monetarisiert werden. Hierzu wird im vorliegenden Beitrag ein kurzer Überblick über die Entscheidung für die gewählte Methode gegeben. Ebenfalls vorgestellt werden ausgewählte erste Ergebnisse.
Transcription of the narration of Reel #2 (collection LA 256)
Creators: name: Parker, Verdena
name: Kelly, Christine
name: Spence, Justin
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2020
Subjects: subject: hup

description: Audio files VP-160417-02a/c: transcription of VP-180317-06 (narration of Reel #2 from the LA 256 collection at SCOIL, one of six reels of 8mm film created by Verdena in the 1960s, featuring scenes of everyday life around Hoopa Valley as well as Brush Dances). From 11:00 to 13:24. Due to re-numbering, Reel #2 has been assigned the CLA item number LA 256.041.
DOODLES OF BEING: SURVEYING, DEFINING, AND IDENTIFYING THE IDEA OF ONTOGRAPHY
Creators: name: STADLER, MICHAEL
Publisher: name: Dipartimento di Scienze Umane, Università di Ferrara
Year: 2015
Subjects: Ontology, ontography, models, Heinrich Rombach, visuality

description: Some philosophers enrich their ontological theories with graphical elements. Others declare 'ontography' as coequal or superior to ontology to justify and disclose methodical ways with which being can be modelled or experienced. This article will provide a survey of the idea of ontography. Out of historical instances, a definition will be developed and its applicability be demonstrated by means of an identification of H. Rombach's Strukturontologie as being 'ontographical' according to parts of the definition. The conclusion of this article will suggest further developments for ontography.
description: I castelli di Yale online, volume III, numero 2, 2015