cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Noise Correlations in one-dimensional systems of ultra-cold fermions
Creators: name: Mathey, L.
name: Altman, E.
name: Vishwanath, A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Time of flight images reflect the momentum distribution of the atoms in the trap, but the spatial noise in the image holds information on more subtle correlations. Using Bosonization, we study such noise correlations in generic one dimensional systems of ultra cold fermions. Specifically, we show how pairing as well as spin and charge density wave correlations may be identified and extracted from the time of flight images. These incipient orders manifest themselves as power law singularities in the noise correlations, that depend on the Luttinger parameters, which suggests a general experimental technique to obtain them.
description: 5 pages, 3 figures. Added discussion on the visibility of noise correlation features for realistic conditions
PRICE DISCOVERY MECHANISMS AND ALTERNATIVES FOR CANADIAN AGRICULTURE; Part III: Applying Pricing Mechanisms
Creators: name: Mussell, Al
name: Mussell, Al
Publisher: name: Unknown
Year: 2003
Subjects: Demand and Price Analysis

description: The general objective of this paper is to demonstrate the use of an innovative pricing mechanism observed from the literature in a context relevant to Canadian agriculture. The specific objectives are: · To select relevant pricing mechanisms from Parts I and II, and to select candidate applications · To describe the operation of the pricing mechanism in application · To describe the application in taxonomy developed in Part I.
CMB Anisotropy Due to Tangled magnetic fields in re-ionized models
Creators: name: Seshadri, T. R.
name: Subramanian, Kandaswamy
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Primordial tangled cosmological Magnetic Fields source rotational velocity perturbations of the baryon fluid, even in the post-recombination universe. These vortical modes inturn leave a characteristic imprint on the temperature anisotropy of the Cosmic Microwave Background (CMB), if the CMB photons can be re-scatterred after recombination. Observations from WMAP indicate that the Universe underwent a relatively early re-ionization ($z_{ri} \sim 15$), which does indeed lead to a significant optical depth for re-scattering of CMB photons after the re-ionization epoch. We compute the resulting additional temperature anisotropies, induced by primordial magnetic fields in the post-recombination universe. We show that in models with early re-ionization, a nearly scale-invariant spectrum of tangled magnetic fields which redshift to a present value of $B_0 \sim 3 \times 10^{-9}$ Gauss, produce vector mode perturbations which in turn induce additional temperature anisotropy of about 0.3 to 0.4 $ μ$K over very small angular scales, with $ l$ upto $\sim 10000 $ or so.
description: 12 pages. Contains one figure. Submitted to Phys. Rev. D
THE FEASIBILITY OF A BOXED BEEF FUTURES CONTRACT: HEDGING WHOLESALE BEEF CUTS
Creators: name: Mattos, Fabio
name: Garcia, Philip
name: Leuthold, Raymond M.
name: Hahn, Tony
name: Mattos, Fabio
name: Garcia, Philip
name: Leuthold, Raymond M.
name: Hahn, Tony
Publisher: name: Unknown
Year: 2003
Subjects: subject: Marketing
subject: FOS: Economics and business
subject: hedge ratio
subject: hedging effectiveness
subject: boxed-beef cutout
subject: wholesale beef prices

description: The purpose of this paper is to investigate the feasibility of a new futures contract for hedging wholesale transactions in the beef industry based on the USDA boxed beef cutout index (BBCO). The results suggest the live cattle futures contract is not an adequate tool to manage the price risk of wholesale meat transactions in the beef industry. However, a futures contract based on the BBCO index might provide considerably more opportunities for the hedging of wholesale meat cut prices. A pattern of improved hedging effectiveness at more distant horizons also appears to emerge for the individual cuts of meat using the conditional hedge procedures. These results may be of particular interest to members of the meat industry with longer planning horizons, and more diversified transactions.
14-B18-Mihaljevic-Novemrezneigre.pdf
Creators: name: Mihaljević, Josip
Publisher: name: figshare
Year: 2020
Subjects: subject: Computer Software
subject: FOS: Computer and information sciences
subject: 80602 Computer-Human Interaction
subject: FOS: Psychology

description: Electronic web games for learning Glagolitic letters
USDA INTERVAL FORECASTS OF CORN AND SOYBEAN PRICES: OVERCONFIDENCE OR RATIONAL INACCURACY?
Creators: name: Isengildina, Olga
name: Irwin, Scott H.
name: Good, Darrel L.
name: Isengildina, Olga
name: Irwin, Scott H.
name: Good, Darrel L.
Publisher: name: Unknown
Year: 2003
Subjects: subject: Demand and Price Analysis
subject: interval forecasts
subject: overconfidence
subject: rational inaccuracy
subject: accuracy-informativeness tradeoff
subject: WASDE

description: The USDA WASDE (World Agricultural Supply and Demand Estimates) price forecasts are published in the form of an interval, but typically analyzed as point estimates. Thus, all information about uncertainty imbedded in the forecast is ignored. The purpose of this paper is to evaluate the accuracy of WASDE price forecasts using methodology suitable for testing judgmental interval forecasts. Empirical analysis includes traditional statistical tests as well as an alternative behavioral evaluation (accuracy-informativeness tradeoff model). The results of the traditional analysis indicate overconfidence of WASDE price interval forecasts, while the results of the behavioral approach suggest rational inaccuracy.
Elektroničke mrežne igre za učenje glagoljice (Electronic web games for learning Glagolitic letters)
Creators: name: Mihaljević, Josip
Publisher: name: figshare
Year: 2020
Subjects: subject: Computer Software
subject: FOS: Computer and information sciences
subject: 80602 Computer-Human Interaction
subject: FOS: Psychology

description: Electronic web games for learning Glagolitic letters
VODAN in a Box: Proof of Concept
Creators: name: Suchánek, Marek
name: Basajja, Mariam
Publisher: name: Zenodo
Year: 2020
Subjects: Virus Outbreak Data Network
FAIR Data
FAIR Data Point
Machine-Actionability
Case Report Forms
Proof of Concept

description: VODAN-in-a-Box (ViB) is a composition of multiple FAIR-enabling and open-source services with a single goal: to support gathering electronic Case Report Forms as FAIR Data in a machine-actionable way but without a need to expose or transfer data outside the facility (so-called on-premise solution). As the name suggests, it is related to the activities of GO FAIR’s implementation network called Virus Outbreak Data Network. It aims to promote FAIR Data during the current and also future virus outbreaks. The most significant partner VODAN-Africa, a network of universities and hospitals in Uganda, Ethiopia, Nigeria, Kenya, Tunisia, and Zimbabwe, participated actively in M4M workshops and on proving the concept of ViB solution. Valuable feedback and beneficial experience emerged during the deployment across African countries for both local experts and developers of the solution. Due to the Proof of Concept that we present in this poster, future development and use of VODAN-in-a-Box can be outlined.
Determinants of Beef and Pork Brand Equity
Creators: name: Parcell, Joseph L.
name: Schroeder, Ted C.
name: Parcell, Joseph L.
name: Schroeder, Ted C.
Publisher: name: Unknown
Year: 2003
Subjects: Demand and Price Analysis

description: A set of consumer-level characteristic demand models were estimated to determine the level of brand equity for pork and beef meat cuts. Results indicate that brand premiums and discounts vary by private, national, and store brands; and brand equity varies across meat cuts carrying the same brand name. Other results are that product size discounts are linear, meat items on sale are significantly discounted to non-sale items, specialty stores typically do not garner higher prices than supermarket/grocery store, and warehouse/super center stores typically premium price to supermarket/ grocery store.
Probing the 2-3 leptonic mixing at high-energy neutrino telescopes
Creators: name: Serpico, Pasquale D.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We discuss the possibility to probe leptonic mixing parameters at high-energy neutrino telescopes in a model-independent way, using astrophysical neutron and pion sources. In particular we show how the octant of the 2-3 mixing angle might be determined independently of prior knowledge of the source, even when current uncertainties on the other mixing parameters are included. We also argue that non-trivial neutrino oscillation effects should be taken into account when using high-energy flavor ratios for astrophysical diagnostics.
description: 5 pages, 2 eps figures. Typos corrected, one reference added
FUTURES MARKET DEPTH: REVEALED VS. PERCEIVED PRICE ORDER IMBALANCES
Creators: name: Pennings, Joost M.E.
name: Garcia, Philip
name: Marsh, Julia W.
name: Pennings, Joost M.E.
name: Garcia, Philip
name: Marsh, Julia W.
Publisher: name: Unknown
Year: 2003
Subjects: subject: Marketing
subject: FOS: Economics and business

description: In this paper we study futures market depth by examining the price path due to order imbalances thereby allowing us to directly gain insight in the execution costs due to a lack of market depth We propose a two dimensional market depth measure in which the price path due to order imbalances is described by an S-shape function. The proposed market depth measure is applied to transaction specific futures data from Euronext. Subsequently, we examine CBOT traders' perceptions about the price path due to order imbalances and examine the characteristics that are associated with a particular perception. The proposed market depth measure gives guidelines for improving market depth, and can be used to compare competitive futures contracts. It appears that the actual price path due to order imbalances does not match the perceived price path. Traders have various perceptions about the price path due to order imbalances. Dominant perceptions were, S-shape, linear, exponential or zigzag price paths. The differences in traders' perceptions can be traced back to different traders' characteristics among others type of primary futures contract traded, importance of information sources and trading strategy (herd vs. non-herd behavior). The observed disconnect between perceptions and revealed price path due to order imbalances have great implications for market participants who try to minimize execution costs and for the futures exchange management that tries to increase the market depth.
KEEP UP THE GOOD WORK? AN EVALUATION OF THE USDA'S LIVESTOCK PRICE FORECASTS
Creators: name: Sanders, Dwight R.
name: Manfredo, Mark R.
name: Sanders, Dwight R.
name: Manfredo, Mark R.
Publisher: name: Unknown
Year: 2003
Subjects: subject: Demand and Price Analysis
subject: forecast evaluation
subject: forecast efficiency
subject: USDA forecasts

description: One step-ahead forecasts of quarterly live cattle, live hog, and broiler prices are evaluated under two general approaches: accuracy-based measures and the ability to categorize price movements directionally or within a forecasted range. Results suggest USDA price forecasts are not optimal. Broiler price forecasts are biased, and all the forecast series tend to repeat errors. While the USDA forecasts are more accurate that those of a univariate AR(4) time series model, the evidence suggests that live cattle forecasts could be improved with a composite forecast. However, the USDA correctly identifies the direction of price change in at least 70% of its forecasts. Prices fall within the USDA's forecasted range 48% of the time for broilers but only 35% for hogs. Finally, there is some evidence that the USDA's price forecasting accuracy has improved over time for broilers, but it has gotten marginally worse for hogs.
Extended hydrodynamics from Enskog's equation: The bidimensional case
Creators: name: Ugawa, Hideaki
Publisher: name: arXiv
Year: 2005
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: A heat conduction problem is studied using extended hydrodynamic equations obtained from Enskog's equation for a simple case of two planar systems in contact through a porous wall. One of the systems is in equilibrium and the other one in a steady conductive state. The example is used to put to test the predictions which has been made with a new thermodynamic formalism.
description: 9 pages, 1 figure, Minor corrections, Accepted in Physica A
The relationship between carbon isotope fractionation and carbon concentrating mechanism activity in marine phytoplankton
Creators: name: Fielding, Anthony Stephen
Publisher: name: University of British Columbia
Year: 2009

description: The ocean is the largest reservoir of carbon on the Earth's surface and hence ocean processes involving carbon are of great importance in light of the growing concern over global warming due to an increased greenhouse effect. Modem phytoplankton assemblages appear to record the CO₂ concentration in seawater through their carbon stable isotope content. Phytoplankton preserved in marine sediments could contain a record of atmospheric CO₂ concentrations dating back as much as 200 million years. However, before using a relationship between CO₂ concentration and the stable isotopic content of phytoplankton, the mechanism(s) behind this apparent relationship must be examined further. Research on carbon isotope fractionation in marine phytoplankton has typically assumed that cells rely on CO₂ diffusion to supply photosynthetic carbon demand. The results of this thesis show that active carbon uptake has a strong influence on carbon isotope fractionation in six species of marine phytoplankton. A more detailed study of the marine diatom Thalassiosira pseudonana demonstrated that carbon concentrating mechanism (CCM) induction occurred over an ecologically relevant range of CO₂ concentrations (ca. 3 to 16.5 μM), and that fractionation decreased simultaneously with increased CCM induction. CCM induction in T. pseudonana appeared to be regulated by CO₂ concentration rather than DIC concentration. Based on the results of experiments and modeling, the CCM appears to involve extracellular carbonic anhydrase catalyzed CO₂ formation from bicarbonate and subsequent uptake of CO₂. A better understanding of factors that influence fractionation, including the involvement of CCM activity and species variability, must be gained before the isotopic composition of sedimentary organic matter can be used as a proxy for past atmospheric CO₂ concentrations.
Model reconstructions for the Si(337) orientation
Creators: name: Chuang, F. C.
name: Ciobanu, C. V.
name: Wang, C. Z.
name: Ho, K. M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Although unstable, the Si(337) orientation has been known to appear in diverse experimental situations such as the nanoscale faceting of Si(112), or in the case of miscutting a Si(113) surface. Various models for Si(337) have been proposed over time, which motivates a comprehensive study of the structure of this orientation. Such a study is undertaken in this article, where we report the results of a genetic algorithm optimization of the Si(337)-$(2\times 1)$ surface. The algorithm is coupled with a highly optimized empirical potential for silicon, which is used as an efficient way to build a set of possible Si(337) models; these structures are subsequently relaxed at the level of ab initio density functional methods. Using this procedure, we retrieve most of the (337) reconstructions proposed in previous works, as well as a number of novel ones.
description: 5 figures (low res.); to appear in J. Appl. Phys
Absorbing transition in a coevolution model with node and link states in an adaptive network: Network fragmentation transition at criticality
Creators: name: Saeedian, Meghdad
name: Miguel, Maxi San
name: Toral, Raul
Publisher: name: arXiv
Year: 2020
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Physical sciences

description: We consider a general model in which there is a coupled dynamics of node states and links states in a network. This coupled dynamics coevolves with dynamical changes of the topology of the network caused by a link rewiring mechanism. Such coevolution model features the interaction of the local dynamics of node and link states with the nonlocal dynamics of link-rewiring in a random network. The coupled dynamics of the states of the nodes and the links produces by itself an absorbing phase transition which is shown to be robust against the link rewiring mechanism. However, the dynamics of the network gives rise to significant physical changes, specially in the limit in which some links do not change state but are always rewired: First a network fragmentation occurs at the critical line of the absorbing transition, and only at this line, so that fragmentation is a manifestation of criticality. Secondly, in the active phase of the absorbing transition, finite-size fluctuations take the system to a single network component consensus phase, while other configurations are possible in the absence of rewiring. In addition, this phase is reached after a survival time that scales linearly with system size, while the survival time scales exponentially with system size when there is no rewiring. A social interpretation of our results contribute to the description of processes of emergence of social fragmentation and polarization.
Operator amenability of the Fourier algebra in the cb-multiplier norm
Creators: name: Forrest, Brian E.
name: Runde, Volker
name: Spronk, Nico
Publisher: name: arXiv
Year: 2005
Subjects: subject: Functional Analysis (math.FA)
subject: Operator Algebras (math.OA)
subject: FOS: Mathematics
subject: Primary 43A22; Secondary 43A30, 46H25, 46J10, 46J40, 46L07, 47L25

description: Let $G$ be a locally compact group, and let $A_\cb(G)$ denote the closure of $A(G)$, the Fourier algebra of $G$, in the space of completely bounded multipliers of $A(G)$. If $G$ is a weakly amenable, discrete group such that $\cstar(G)$ is residually finite-dimensional, we show that $A_\cb(G)$ is operator amenable. In particular, $A_\cb(F_2)$ is operator amenable even though $F_2$, the free group in two generators, is not an amenable group. Moreover, we show that, if $G$ is a discrete group such that $A_\cb(G)$ is operator amenable, a closed ideal of $A(G)$ is weakly completely complemented in $A(G)$ if and only if it has an approximate identity bounded in the cb-multiplier norm.
description: LaTeX2e; 18 pages; cleaned up a bit
Farmers' Subjective Perceptions of Yield and Yield Risk
Creators: name: Egelkraut, Thorsten M.
name: Sherrick, Bruce J.
name: Garcia, Philip
name: Pennings, Joost M.E.
name: Egelkraut, Thorsten M.
name: Sherrick, Bruce J.
name: Garcia, Philip
name: Pennings, Joost M.E.
Publisher: name: Unknown
Year: 2006
Subjects: Crop Production/Industries

description: Using survey responses of Illinois corn farmers to differently framed yield questions, we examine their subjective information by relating stated yields and risk to the corresponding objective county measures. The results show that farm-level yields can be best characterized by soliciting probabilistic information, which provides more accurate yield assessments than an open-ended frame and consistent estimates of producers- subjective risk. Moreover, we find that overconfidence can be confused with differences in relevant information and that using recent data may be more appropriate in examining subjective risk statements. Our results are important for agricultural policy-makers and researchers, particularly those who work with surveys that include questions about producers' yields.
Short-term spatio-temporal demand pattern predictions of trip demand
Creators: name: Schwemmle, Nicola
Publisher: name: Zenodo
Year: 2021

description: Being able to accurately predict future taxi demand can beneficial not only for taxi companies but also for passengers and the environment as as an intelligent taxi planning system can reduce waiting and idle driving times. This thesis proposes a simple LSTM based neural network structure for predicting future taxi demand for many locations at the same time. Experiments are performed on taxi data from New York City from June, 2016 to June, 2019 and also weather measurements from Central Park, NY for the same time. The model’s hyperparameters are tuned using a very simple selection method based on predictions for only one location at a time which results in a model that has very accurate results for most of the zones but fails to accurately predict the demand for zones with a very low average number of pickups. More complex, state-of-the-art algorithms, hyperopt and BOHB, implemented to tune the model’s hyperparameters in a more structured and comprehensive way can further reduce the error but only slightly (2.2% MSE reduction). The results suggest that there are factors that limit the performance gains of popular hyperparameter optimization techniques but also that a relatively simple model is able to yield useful predictions and outperform several
 naive benchmark methods.
Probability Distortion and Loss Aversion in Futures Hedging
Creators: name: Mattos, Fabio
name: Garcia, Philip
name: Pennings, Joost M.E.
name: Mattos, Fabio
name: Garcia, Philip
name: Pennings, Joost M.E.
Publisher: name: Unknown
Year: 2006
Subjects: subject: Marketing
subject: FOS: Economics and business

description: We analyze how the introduction of probability distortion and loss aversion in the standard hedging problem changes the optimal hedge ratio. Based on simulated cash and futures prices for soybeans, our results indicate that the optimal hedge changes considerably when probability distortion is considered. However, the impact of loss aversion on hedging decisions appears to be small, and it diminishes as loss aversion increases. Our findings suggest that probability distortion is a major driving force in hedging decisions, while loss aversion plays just a marginal role.
A Term Structure Model for Commodity Prices: Does Storability Matter?
Creators: name: Lin, Chuanyi
name: Roberts, Matthew C.
name: Lin, Chuanyi
name: Roberts, Matthew C.
Publisher: name: Unknown
Year: 2006
Subjects: Demand and Price Analysis

description: Econometric models of commodity prices have been estimated for more than 80 years, but both structural and time series models require ad hoc assumptions to capture all the features of commodity price series. Commodities can be broadly divided into two categories: storable and non-storable. The purpose of this study is to investigate the effects of storability on commodity futures pricing, especially whether meats can be reasonably approximated by storable commodity term structure models. From the empirical analysis of seven commodity futures prices, the two-factor Schwartz model is found to perform well for less storable commodities.
The Effects of Hurricane Katrina on Corn, Wheat and Soybean Futures Prices and Basis
Creators: name: Lara-Chavez, Angel
name: Alexander, Corinne E.
name: Lara-Chavez, Angel
name: Alexander, Corinne E.
Publisher: name: Unknown
Year: 2006
Subjects: subject: Marketing
subject: FOS: Economics and business

description: Hurricane Katrina caused considerable damage to transportation infrastructure, grain export facilities, and to some crop areas in 2005. Assuming that financial market participants considered the disruption of the grain transportation system by Katrina as having an important impact on fundamental supply and demand factors, futures and/or national basis would subsequently adjust. The objective of this research was to determine the reaction in corn, wheat, and soybean futures and basis due to Katrina using an event study methodology. One parametric (Constant mean return) and one nonparametric procedure (Corrado's rank test) were used to define whether there were statistically significant abnormal returns. During Katrina abnormal returns were larger on the wheat futures market than on the corn and soybean futures markets, which could be partially explained by the timing of the Katrina's landfall with the grain export activities. However, there were only a few statistically significant daily abnormal returns in the futures prices due to the hurricane. There was some evidence of significant cumulative abnormal returns in the corn and wheat futures markets prior to and surrounding the Katrina's landfall. In conclusion, the majority of the corn market reaction to Katrina's damage occurred in the basis and not in the futures market. For the soybean market there was weak evidence of significant reaction in both basis and futures prices. In the case of wheat, the basis was not evaluated and wheat futures prices reacted to the disruption caused by Katrina. The reaction in the corn, wheat and soybean futures prices due to Katrina could have being moderated by the presence of large stocks and large expected production levels of these grains in 2005 or simply by the fact that the damage caused by the hurricane did not affect fundamental supply and demand factors; rather, they only affected transportation logistics.
Neutron structure effects in the deuteron and one neutron halos
Creators: name: Nowakowski, M.
name: Kelkar, N. G.
name: Mart, T.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Although the neutron (n) does not carry a total electric charge, its charge and magnetization distributions represented in momentum space by the electromagnetic form factors, $F_1^{(n)} (q^2)$ and $F_2^{(n)} (q^2)$, lead to an electromagnetic potential of the neutron. Using this fact, we calculate the electromagnetic corrections to the binding energy, $B_d$, of the deuteron and a one neutron halo nucleus (11Be), by evaluating the neutron-proton and the neutron-charged core (10Be) potential, respectively. The correction to $B_d$ (~9 keV) is comparable to that arising due to the inclusion of the $Δ$-isobar component in the deuteron wave function. In the case of the more loosely bound halo nucleus, 11Be, the correction is close to about 2 keV.
description: LaTex, 22 pages, 3 figures
OWNERSHIP STRUCTURE AND ENDOGENOUS QUALITY CHOICE
Creators: name: Hoffmann, Ruben
name: Hoffmann, Ruben
Publisher: name: Unknown
Year: 2002
Subjects: Research Methods/ Statistical Methods

description: This paper examines how ownership structure affects quality choice and the subsequent equilibrium outcomes within a duopoly framework. Specifically, investor owned firms and cooperatives are analyzed in a closed market setting where these firms may coexist in the economy. The conditions under which ownership structure matters are identified. We conclude that ownership structure matters if the cost of quality at farm level is fixed or if there is a variable cost exhibiting non-constant returns to scale. Two farm level cost functions, a fixed cost function that is increasing and convex in quality, and a variable cost function that is increasing and convex in quantity are analyzed. The two processing firms play a two-stage game where each of the firms produces either high or low quality goods. In the first stage they decide the level of quality to produce, and in the second stage they compete in prices. In the case of a fixed cost function only cooperatives consider the costs incurred at farm level in the first stage of the game. Hence, investor owned firms produce higher levels of qualities at lower prices and generates a larger consumer surplus than cooperatives. The high quality market share is constant in all scenarios. In the case of a variable cost function at farm level, the cooperative has a cost advantage, as the investor owned processor has to pay farm level marginal cost for all farm inputs. It is found that cooperatives generate higher levels and larger quantities of the high quality good at lower prices. This results in higher profits and a larger market share of the high quality good. The cooperative structure also generates a larger consumer surplus and a higher total welfare than the investor owned structure.
Injective tensor products in strict deformation quantization
Creators: name: Murro, Simone
name: van de Ven, Christiaan J. F.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mathematical Physics (math-ph)
subject: Functional Analysis (math.FA)
subject: Operator Algebras (math.OA)
subject: Quantum Algebra (math.QA)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: Primary: 46L65, 81R15, Secondary: 46L06, 82B20

description: The aim of this paper is two-fold. Firstly we provide necessary and sufficient criteria for the existence of a strict deformation quantization of algebraic tensor products of Poisson algebras, and secondly, we discuss the existence of products of KMS states. As an application, we discuss the correspondence between quantum and classical Hamiltonians in spin systems and we provide a relation between the resolvent of Schödinger operators for non-interacting many-particle systems and quantization maps.
description: 16 pages -- accepted in Mathematical Physics, Analysis and Geometry
A Bayesian analysis of regularised source inversions in gravitational lensing
Creators: name: Suyu, S. H.
name: Marshall, P. J.
name: Hobson, M. P.
name: Blandford, R. D.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Strong gravitational lens systems with extended sources are of special interest because they provide additional constraints on the models of the lens systems. To use a gravitational lens system for measuring the Hubble constant, one would need to determine the lens potential and the source intensity distribution simultaneously. A linear inversion method to reconstruct a pixellated source brightness distribution of a given lens potential model was introduced by Warren & Dye. In the inversion process, a regularisation on the source intensity is often needed to ensure a successful inversion with a faithful resulting source. In this paper, we use Bayesian analysis to determine the optimal regularisation constant (strength of regularisation) of a given form of regularisation and to objectively choose the optimal form of regularisation given a selection of regularisations. We consider and compare quantitatively three different forms of regularisation previously described in the literature for source inversions in gravitational lensing: zeroth-order, gradient and curvature. We use simulated data with the exact lens potential to demonstrate the method. We find that the preferred form of regularisation depends on the nature of the source distribution.
description: 18 pages, 10 figures; Revisions based on referee's comments after initial submission to MNRAS
String-Inspired Triplet See-Saw from Diagonal Embedding of SU(2)_L in SU(2)_A x SU(2)_B
Creators: name: Langacker, Paul
name: Nelson, Brent D.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Motivated by string constructions, we consider a variant on the Type II see-saw mechanism involving the exchange of triplet representations of SU(2)_L in which this group arises from a diagonal embedding into SU(2)_A x SU(2)_B. A natural assignment of Standard Model lepton doublets to the two underlying gauge groups results in a bimaximal pattern of neutrino mixings and an inverted hierarchy in masses. Simple perturbations around this leading-order structure can accommodate the observed pattern of neutrino masses and mixings.
description: 8 pages; uses RevTeX
Ground states of 2D tilted dipolar bosons with density-induced hopping
Creators: name: Zhang, Chao
name: Zhang, Jin
name: Yang, Jin
name: Capogrosso-Sansone, Barbara
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Motivated by recent experiments with ultracold magnetic atoms trapped in optical lattices where the orientation of atomic dipoles can be fully controlled by external fields, we study the ground state properties of dipolar bosons trapped in a two-dimensional lattice with density-induced hopping and where the dipoles are tilted along the $xz$ plane. We present ground state phase diagrams of the above system at different tilt angles. We find that, as the dipolar interaction increases, the superfluid phase at half filling factor is destroyed in favor of either a checkerboard or stripe solid phase for tilt angle $θ\lesssim 35.3^{\circ}$ or $θ\gtrsim 35.3^{\circ}$ respectively. More interesting physics happens at tilt angles $θ\gtrsim 58^{\circ}$, where we find that, as the dipolar interaction strength increases, solid phases first appear at filling factor lower than $0.5$. Moreover, unlike what observed at lower tilt angles, we find that, at half filling, a stripe supersolid intervenes between the superfluid and stripe solid phase.
description: 9 pages
Coherent Population Trapping of Electron Spins in a Semiconductor
Creators: name: Fu, Kai-Mei C.
name: Santori, Charles
name: Stanley, Colin
name: Holland, M. C.
name: Yamamoto, Yoshihisa
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In high-purity n-type GaAs under strong magnetic field, we are able to isolate a lambda system composed of two Zeeman states of neutral-donor bound electrons and the lowest Zeeman state of bound excitons. When the two-photon detuning of this system is zero, we observe a pronounced dip in the excited-state photoluminescence indicating the creation of the coherent population-trapped state. Our data are consistent with a steady-state three-level density-matrix model. The observation of coherent population trapping in GaAs indicates that this and similar semiconductor systems could be used for various EIT-type experiments.
description: 5 pages, 4 figures replaced 6/25/2007 with PRL version
Standard-like Models as Type IIB Flux Vacua
Creators: name: Cvetic, Mirjam
name: Li, Tianjun
name: Liu, Tao
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: We construct new semi-realistic Type IIB flux vacua on $Z_2\times Z_2$ orientifolds with three- and four- Standard Model (SM) families and up to three units of quantized flux. The open-string sector is comprised of magnetized D-branes and is T-dual to supersymmetric intersecting D6-brane constructions. The SM sector contains magnetized D9-branes with negative D3-brane charge contribution. There are large classes of such models and we present explicit constructions for representative ones. In addition to models with one and two units of quantized flux, we also construct the first three- and four-family Standard-like models with supersymmetric fluxes, i.e. comprising three units of quantized flux. Supergravity fluxes are due to the self-dual NS-NS and R-R three-form field strength and they fix the toroidal complex structure moduli and the dilaton. The supersymmetry conditions for the D-brane sector fix in some models all three toroidal Kähler moduli. We also provide examples where toroidal K\" ahler moduli are fixed by strong gauge dynamics on the ``hidden sector'' D7-brane. Most of the models possess Higgs doublet pairs with Yukawa couplings that can generate masses for quarks and leptons. The models have (mainly right-) chiral exotics.
description: 31 pages
Scale-free avalanche dynamics in the stock market
Creators: name: Bartolozzi, M.
name: Leinweber, D. B.
name: Thomas, A. W.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Statistical Finance (q-fin.ST)
subject: FOS: Physical sciences
subject: FOS: Economics and business

description: Self-organized criticality has been claimed to play an important role in many natural and social systems. In the present work we empirically investigate the relevance of this theory to stock-market dynamics. Avalanches in stock-market indices are identified using a multi-scale wavelet-filtering analysis designed to remove Gaussian noise from the index. Here new methods are developed to identify the optimal filtering parameters which maximize the noise removal. The filtered time series is reconstructed and compared with the original time series. A statistical analysis of both high-frequency Nasdaq E-mini Futures and daily Dow Jones data is performed. The results of this new analysis confirm earlier results revealing a robust power law behaviour in the probability distribution function of the sizes, duration and laminar times between avalanches. This power law behavior holds the potential to be established as a stylized fact of stock market indices in general. While the memory process, implied by the power law distribution of the laminar times, is not consistent with classical models for self-organized criticality, we note that a power-law distribution of the laminar times cannot be used to rule out self-organized critical behaviour.
description: Proceeding to "Econophysics Colloquium", Canberra 14-18 November 2005, to appear on "Physica A"
A MULTIATTRIBUTE UTILITY ANALYSIS OF TECHNOLOGICAL CHOICE IN THE CALIFORNIA WILD RICE INDUSTRY
Creators: name: Noel, Jay E.
name: Ahern, James
name: Noel, Jay E.
name: Ahern, James
Publisher: name: Unknown
Year: 2002
Subjects: Research and Development/Tech Change/Emerging Technologies

description: Technological choice and competitive strategy issues are reviewed and then a framework for choosing between two competing technologies is proposed.The two competing technologies differ in their ability to store and process wild rice over a marketing year. The traditional technologies requires almost immediate processing of the harvested wild rice while the experimental technology allows harvested wild rice to be stored and processed over the course of the marketing year. Technological choice is explored using multiattribute utility analysis and two economic evaluations. The economic evaluations are payback period analysis and internal rate of return analysis given uncertain demand conditions. The experimental technology is shown to be the dominant technological choice under both multiattribute utility analysis and the economic analyses.
Arsenic and SARS-Cov-2 Maps
Creators: name: Besharati, Mohammad Reza
name: Izadi, Mohammad
name: Alireza Talebpour
Publisher: name: Zenodo
Year: 2021
Subjects: Sars-Cov-2, Arsenic, Protective Effect

description: Arsenic and SARS-Cov-2 Maps (Protective Effects were observed in areas with ppb concentrations of natural contamination of Arsenic) (France, Japan, Pakistan, Spain, Taiwan, USA, Argentine, Australia, World Maps)
Effect of Chemical Structure on the Isobaric and Isochoric Fragility in Polychlorinated Biphenyls
Creators: name: Roland, C. M.
name: Casalini, R.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Pressure-volume-temperature data, along with dielectric relaxation measurements, are reported for a series of polychlorinated biphenyls (PCB), differing in the number of chlorine atoms on their phenyl rings. Analysis of the results reveals that with increasing chlorine content, the relaxation times of the PCB become governed to a greater degree by density, rho, relative to the effect of temperature, T. This result is consistent with the respective magnitudes of the scaling exponent, gamma, yielding superpositioning of the relaxation times measured at various temperatures and pressures, when plotted versus rho^gamma/T. While at constant (atmospheric) pressure, fragilities for the various PCB are equivalent, the fragility at constant volume varies inversely with chlorine content. Evidently, the presence of bulkier chlorine atoms on the phenyl rings magnifies the effect density has on the relaxation dynamics.
description: 20 pages 5 figures
PROPERTY RIGHTS, PRODUCTION TECHNOLOGY AND DEFORESTATION: COCOA IN WEST AFRICA
Creators: name: Kazianga, Harounan
name: Masters, William A.
name: Kazianga, Harounan
name: Masters, William A.
Publisher: name: Unknown
Year: 2002
Subjects: Resource /Energy Economics and Policy

description: In this paper, we use a vintage-capital model with risk of eviction to assess cocoa farmers' response to changes in their tenure security and to the introduction of a new, faster-maturing cocoa variety. The model is calibrated with data from Cameroon in calendar year 2000, and then used to simulate the effects of institutional and technical change on farmer welfare and deforestation rates. Our findings can be summarized in three points. First, improved tenure security over cocoa fields increases farmers' consumption and welfare, but at the expense of more deforestation. Second, the introduction of new cocoa varieties with faster maturity and higher input response also unambiguously raises farmers' consumption and welfare. Doing so increases deforestation under insecure land tenure, but slows down deforestation under secure land tenure. Third, when introducing the two innovations together (more security and also new varieties), there is both an increase in welfare and a decline in deforestation. In sum, the availability of new cocoa cultivars calls for stronger tenure security, to accelerate investment and reduce deforestation.
Emergence of Charge Loop Current in Geometrically Frustrated Hubbard Model: Functional Renormalization Group Study
Creators: name: Tazai, Rina
name: Yamakawa, Youichi
name: Kontani, Hiroshi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Spontaneous current orders due to odd-parity order parameters attract increasing attention in various strongly correlated metals. Here, we discover a novel spin-fluctuation-driven charge loop current (cLC) mechanism based on the functional renormalization group (fRG) theory. The present mechanism leads to the ferro-cLC order in a simple frustrated chain Hubbard model. The cLC appears between the antiferromagnetic and $d$-wave superconducting ($d$SC) phases. While the microscopic origin of the cLC has a close similarity to that of the $d$SC, the cLC transition temperature $T_{\rm cLC}$ can be higher than the $d$SC one for wide parameter range. Furthermore, we reveal that the ferro cLC order is driven by the strong enhancement of the forward scatterings $g_2$ and $g_4$ owing to the two dimensionality based on the $g$-ology language. The present study indicates that the cLC can emerge in metals near the magnetic criticality with geometrical frustration
description: 11 pages, 15 figures, has been published in Phys. Rev. B
TWO-STAGE OLIGOPOLY PRICING WITH DIFFERENTIATED PRODUCT: THE BOSTON FLUID MILK MARKET
Creators: name: Dhar, Tirtha Pratim
name: Cotterill, Ronald W.
name: Dhar, Tirtha Pratim
name: Cotterill, Ronald W.
Publisher: name: Unknown
Year: 2002
Subjects: Demand and Price Analysis

description: By specifying a structural model, the present study estimates different indicators of competitiveness of the fluid milk market, namely average and marginal cost, average profits and price-cost margins, and utility levels for the full, and pre and post Compact time period.
Introduction to Mendeley
Creators: name: Primayana, Kadek Hengki
Publisher: name: Zenodo
Year: 2020

description: Mendeley is free software which is available across a number of different platforms. You can run Mendeley on your computer or laptop, your phone or tablet, and also access it from any modern browser. You can either download the appropriate app for your particular device, or use your web browser to log onto the web version. Mendeley’s Desktop application offers the most complete experience - allowing you to organize, collaborate and discover, as well as use the citation plugin to cite as you write in Microsoft Word or LibreOffice. We’ll cover this in more detail later on. The other versions - Web and Mobile - offer you the ability to access your references on the go, as well as making notes and annotations.
Harms, H. H. (Hrsg.), Die Kirche von England und die Anglikanische Kirchengemeinschaft
Creators: name: Küppers, Werner
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 16 Nr. 2 (1967): Ökumenische Rundschau, Band 16, Heft 2
Developement of a stabilized Fabry-Perot etalon based calibrator for Hanle Echelle Spectrograph (HESP)
Creators: name: Das, Tanya
name: Banyal, Ravinder K.
name: T., Sivarani
name: B, Ravindra
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Accurate wavelength calibration is an important factor for any measurement with high resolution spectrographs. Stellar spectrum comprises of discrete absorption or emission lines whose position is precisely determined by calibrating the spectrograph using known reference lines generated from laboratory sources. For the spectrograph to measure small variations in Doppler shift, the wavelength calibration must be sufficiently stable during observation time. Instrument instability, mainly due to environmental factors like temperature and pressure variations, limitations of traditional calibration methods, for example Th-Ar lamps, are the main challenges which high precision spectroscopy. Through proper environmental control, by maintaining pressure at few mbar and temperature fluctuations within $\pm$0.05$^{\circ}$C, Fabry Pérot etalon (FP) can yield a velocity precision of 1-10 m/s, when used for wavelength calibration. We have developed a passively stabilized FP based wavelength calibrator for Hanle Echelle Spectrograph (HESP) installed on Himalayan Chandra Telescope (HCT) at Indian Astronomical Observatory (IAO), Hanle, India. The etalon has been characterized using Fourier Transform Spectrograph (FTS) and initial test runs have been performed with HESP. In this paper we present the design and construction of the instrument along with preliminary test results obtained from HESP.
description: Accepted in Applied Optics. 9 pages, 19 figures
Why holes are not like electrons. II. The role of the electron-ion interaction
Creators: name: Hirsch, J. E.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: In recent work, we discussed the difference between electrons and holes in energy band in solids from a many-particle point of view, originating in the electron-electron interaction, and argued that it has fundamental consequences for superconductivity. Here we discuss the fact that there is also a fundamental difference between electrons and holes already at the single particle level, arising from the electron-ion interaction. The difference between electrons and holes due to this effect parallels the difference due to electron-electron interactions: {\it holes are more dressed than electrons}. We propose that superconductivity originates in 'undressing' of carriers from $both$ electron-electron and electron-ion interactions, and that both aspects of undressing have observable consequences.
description: Continuation of Phys.Rev.B65, 184502 (2002) = cond-mat/0109385 (2001)