cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
THE EFFECTS OF FUTURES TRADING BY LARGE HEDGE FUNDS AND CTAS ON MARKET VOLATILITY
Creators: name: Holt, Bryce R.
name: Irwin, Scott H.
name: Holt, Bryce R.
name: Irwin, Scott H.
Publisher: name: Unknown
Year: 2000
Subjects: subject: Marketing
subject: FOS: Economics and business
subject: hedge fund
subject: commodity trading advisor
subject: volatility
subject: market efficiency
subject: futures markets

description: This study uses the newly available data from the CFTC to investigate the market impact of futures trading by large hedge funds and CTAs. Regression results show that there is a positive relationship between the trading volume of large hedge funds and CTAs and market volatility. However, a positive relationship between hedge fund and CTA trading volume and market volatility is consistent with either a private information or noise trader hypothesis. Three additional tests are conducted to distinguish between the private information hypothesis and the noise trader hypothesis. The first test consisted of identifying the noise component exhibited in return variances over different holding periods. The variance ratio tests provide little support for the noise trader hypothesis. The second test examined whether positive feedback trading characterized large hedge fund and CTA trading behavior. These results suggest that trading decisions by large hedge funds and CTAs, although influenced in small part by past price changes, are not driven by past price changes. The third test consists of estimating the profits and losses associated with the open interest positions of large hedge funds and CTAs. This test is based on the argument that speculative trading can only be destabilizing if speculators buy when prices are high and sell when prices are low, which in turn, implies that destabilizing speculators lose money. Across all thirteen markets, the profit for large hedge funds and CTAs is estimated to be just under $400 million. This implies that the trading decisions are likely based on valuable private information. Overall, the evidence presented in this study suggests trading by large hedge funds and CTAs is based on private fundamental information. These findings imply large hedge funds and CTAs benefit market efficiency by bringing valuable, fundamental information to the market through their trading.
Project management for PhD students
Creators: name: Ahmadi, Arash
name: Kvellestad, Anders
Publisher: name: Zenodo
Year: 2024

description: Slides from the full-day workshop Project management for PhD students during Digital Scholarship Days 2024 at the University of Oslo.From the workshop description: The workshop is designed to give PhD students a broad and comprehensive perspective into strategies, tools, techniques and a set of collective experiences related to management of a PhD project. The content covers areas such as knowledge management, progress management, analysis and software management, reporting and dissemination as well as human interaction aspects of the project management. We will discuss "dos and don’ts" and a set of best practices around the mentioned areas, and also include time for discussion and exchange of personal experiences.
Non-Hermitian route to higher-order topology in an acoustic crystal
Creators: name: Gao, He
name: Xue, Haoran
name: Gu, Zhongming
name: Liu, Tuo
name: Zhu, Jie
name: Zhang, Baile
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Topological phases of matter are classified based on their Hermitian Hamiltonians, whose real-valued dispersions together with orthogonal eigenstates form nontrivial topology. In the recently discovered higher-order topological insulators (TIs), the bulk topology can even exhibit hierarchical features, leading to topological corner states, as demonstrated in many photonic and acoustic artificial materials. Naturally, the intrinsic loss in these artificial materials has been omitted in the topology definition, due to its non-Hermitian nature; in practice, the presence of loss is generally considered harmful to the topological corner states. Here, we report the experimental realization of a higher-order TI in an acoustic crystal, whose nontrivial topology is induced by deliberately introduced losses. With local acoustic measurements, we identify a topological bulk bandgap that is populated with gapped edge states and in-gap corner states, as the hallmark signatures of hierarchical higher-order topology. Our work establishes the non-Hermitian route to higher-order topology, and paves the way to exploring various exotic non-Hermiticity-induced topological phases.
The effects of pH and dilution pretreatments and removal of water-soluble components on the functional properties of spray-dried egg yolk powder
Creators: name: Tang, Karen Sze-Hang
Publisher: name: University of British Columbia
Year: 2009

description: Spray-drying increases shelf-life and convenience of egg yolk, but may induce damage to its functional properties. The objectives of this study were to investigate the functional properties of spray-dried yolk powders as a function of different pH (3 to 9) and dilution (2- to 10-fold) pre treatments, and to study the impact of spray-drying on functional properties of yolk pellet, the fraction remaining after removal of water-soluble components. Protein solubility and emulsifying properties (Emulsifying Activity Index and Emulsion Stability Index) were considered. Pre-drying pH and dilution had significant effects on protein solubility of the spray-dried powders (p < 0.0001). Protein solubilities of liquid and spray-dried yolk were ~ 70 % and 50 %, respectively. Highest solubility (> 60 %) was obtained when predrying pH was between 5.5 to 9 and dilution between 4- to 9-fold, while emulsions of the yolk powders were most stable when pre-drying pH was between 8.0 to 10.0 and dilution between 2- to 4-fold. Based on the protein functionality test results, the best pretreatment condition would be pH 8.5 with 6 times dilution and the worst condition would be pH 3.0 with 6 times dilution. Pellet powder was relatively insoluble (25 % protein solubility) and its emulsion was less stable. Interestingly, liquid pellet gave better emulsion stabilization than commercial liquid yolk. Freeze-drying produced dried yolk with better emulsion stability than spray-drying. However, duration of storage and batch-to-batch variation of commercial yolk might have influenced the results. Differential Scanning Calorimetry showed similar thermograms for yolk powder with best pretreatment conditions, liquid yolk and spray-dried yolk control (T[sub d] ~ 80°C). Almost no denaturation peak was detected for pellet samples or yolk powder with the worst pretreatment conditions. Results showed that water-soluble fraction of yolk was the main contributor to the thermal behavior of yolk, and freeze-dried yolk samples were more labile to heat denaturation when reconstituted at pH 3 than at higher pHs. The Raman spectra of yolk samples were dominated by vibrational bands of the lipid components, and therefore possible differences in lipoprotein structure as a function of spray drying could not be detected.
DELIVERY OPTIONS IN FUTURES CONTRACTS AND BASIS BEHAVIOR AT CONTRACT MATURITY
Creators: name: Hranaiova, Jana
name: Hranaiova, Jana
Publisher: name: Unknown
Year: 2000
Subjects: subject: Marketing
subject: FOS: Economics and business
subject: delivery options
subject: joint timing-location option
subject: basis convergence

description: This paper estimates values of the delivery options implicit in the CBOT corn futures contract. Joint values of the timing and location options are estimated for the years 1989-97. By interacting the effects of the two delivery options, a potentially more accurate estimates are obtained. Two models are presented that rely on different assumptions about the institutional setup of the delivery process. The first model approximates the discreteness of the three day delivery process, while the second model relies on an assumption of immediate delivery that is consistent with the existing literature on pricing options. Individual hedgers can use these models to help them make delivery decisions. When all the costs of delivery are incorporated, true value of the delivery options can be obtained analytically. This can then be used to determine possible mispricing in the market as well as optimality of delivering early or delaying delivery. The estimated option values are used to explain the variability of bases in the deliverable locations. This application is useful for the exchange in evaluating hedging performance of futures contracts with respect to the delivery options embedded in them.
X(1835): A Possible Baryonium?
Creators: name: Zhu, Shi-Lin
name: Gao, Chong-Shou
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We point out that (1) the large $p\bar p$ coupling and suppressed mesonic coupling of X(1835) and (2) the suppression of the three-body strange final states strongly indicate that X(1835) may be a $p\bar p$ baryonium. We also point out that the branching ratio of $X(1835)\toηππ$ should be bigger than that of $X(1835)\toη^\prime ππ$. If BES further confirms the non-observation of X(1835) in the $ηππ$ channel, that will be very puzzling. Finally, X(1835) may be used a tetraquark generator if X(1835) is really established as a baryonium state.
description: Comments and suggestions welcome
U.S. FARM POLICY AND THE VARIABILITY OF COMMODITY PRICES AND FARM REVENUES
Creators: name: Lence, Sergio H.
name: Hayes, Dermot J.
name: Lence, Sergio H.
name: Hayes, Dermot J.
Publisher: name: Unknown
Year: 2000
Subjects: subject: Agricultural and Food Policy
subject: FAIR Act
subject: price volatility
subject: storage

description: A dynamic three-commodity rational-expectations storage model is used to compare the impact of the Federal Agricultural Improvement and Reform (FAIR) Act of 1996 with a free-market policy, and with the agricultural policies that preceded the FAIR Act. Results support the hypothesis that the changes enacted by FAIR did not lead to permanent significant increases in the volatility of farm prices or revenues. An important finding is that the main economic impacts of the pre-FAIR scenario, relative to the free-market regime, were to transfer income to farmers and to substitute government storage for private storage in a way that did little to support prices or to stabilize farm incomes.
ROLLOVER HEDGING
Creators: name: Yoon, Byung-Sam
name: Brorsen, B. Wade
name: Yoon, Byung-Sam
name: Brorsen, B. Wade
Publisher: name: Unknown
Year: 2000
Subjects: subject: Marketing
subject: FOS: Economics and business
subject: Rollover hedging
subject: mean reversion
subject: market efficiency

description: Both market advisors and researchers have often suggested rollover hedging as a way of increasing producer returns. This study tests whether rollover hedging can increase expected returns for producers. For rollover hedging to increase expected returns, futures prices must follow a mean-reverting process. Using both the return predictability test based on long-horizon regression and the variance ratio test, we find that mean reversion does not exist in futures prices for corn, wheat, soybeans, soybean oil and soybean meal. The findings are consistent with the weak form of market efficiency. The results of the study imply that rollover hedging should not be seriously considered as a marketing alternative. As long as the commodity markets are efficient, the efforts of producers to improve returns through market timing strategies will meet limited success over time.
Twin-photon techniques for photo-detector calibration
Creators: name: Brida, G.
name: Genovese, M.
name: Gramegna, M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The aim of this review paper is to enlighten some recent progresses in quantum optical metrology in the part of quantum efficiency measurements of photo-detectors performed with bi-photon states. The intrinsic correlated nature of entangled photons from Spontaneous Parametric Down Conversion phenomenon has opened wide horizons to a new approach for the absolute measurement of photo-detector quantum efficiency, outgoing the requirement for conventional standards of optical radiation; in particular the simultaneous feature of the creation of conjugated photons led to a well known technique of coincidence measurement, deeply understood and implemented for standard uses. On the other hand, based on manipulation of entanglement developed for Quantum Information protocols implementations, a new method has been proposed for quantum efficiency measurement, exploiting polarisation entanglement in addition to energy-momentum and time ones, that is based on conditioned polarisation state manipulation. In this review, after a general discussion on absolute photo-detector calibration, we compare these different methods, in order to give an accurate operational sketch of the absolute quantum efficiency measurement state of the art.
Description of Fischer Clusters Formation in Supercooled Liquids Within Framework of Continual Theory of Defects
Creators: name: Vasin, M. G.
name: Lad'yanov, V. I.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Liquid is represented as complicated system of disclinations according to defect description of liquids and glasses. The expressions for the linear disclination field of an arbitrary form and energy of inter-disclination interaction are derived in the framework of gauge theory of defects. It allows us to describe liquid as a disordered system of topological moments and reduce this model to the Edwards--Anderson model with large-range interaction. Within the framework of this approach vitrifying is represented as a "hierarchical" phase transition. The suggested model allows us to explain the process of the Fischer clusters formation and the slow dynamics in supercooled liquids close to the liquid--glass transition point.
The Dwarf Spheroidal Companions to M31: Variable Stars in Andromeda I and Andromeda III
Creators: name: Pritzl, Barton J.
name: Armandroff, Taft E.
name: Jacoby, George H.
name: Da Costa, G. S.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: (Abridged) We present the results of variable star searches of the M31 dwarf spheroidal companions Andromeda I and Andromeda III using the Hubble Space Telescope. A total of 100 variable stars were found in Andromeda I, while 56 were found in Andromeda III. One variable found in Andromeda I and another in Andromeda III may be Population II Cepheids. In addition to this variable in Andromeda III, another four variables are anomalous Cepheids. We found 72 fundamental mode RR Lyrae stars and 26 first-overtone mode RR Lyrae stars in Andromdea I giving mean periods of 0.575 day and 0.388 day, respectively. One likely RR Lyrae was not classified. For Andromeda III, 39 RR Lyrae stars are pulsating in the fundamental mode with a mean period of 0.657 day and 12 are in the first-overtone mode with a mean period of 0.402 day. While Andromeda I has a mean period that is consistent with its metallicity, the mean period of the fundamental mode RR Lyrae in Andromeda III is larger than expected. In Andromeda I, we found two RR Lyrae stars which are noticeably fainter than the horizontal branch. We discuss the possibility that these stars are associated with the recently discovered stellar stream in the halo of M31. We find =25.14+/-0.04 mag for Andromeda I resulting in a distance of 765+/-25 kpc. For Andromeda III, =25.01+/-0.04 mag giving a distance of 740+/-20 kpc. The relation between specific frequency of anomalous Cepheids and mean metallicity of the galaxy in the M31 dwarf spheroidal galaxies follows the same relation as the Galactic dwarf spheroidal galaxies.
description: 25 pages, including 14 figures and 9 tables, emulateapj v. 6/22/04 style. Accepted by the Astronomical Journal for approximate publication date of April 2005. A full-resolution preprint can be found at http://www.macalester.edu/~pritzl/
Intra-night Optical Variability of Luminous Radio Quiet QSOs
Creators: name: Gupta, A. C.
name: Joshi, U. C.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In the present paper we report the detection of intra-night variability in some of the RQQSOs and one LDQ. To study intra-night variability, we carried out photometric monitoring of seven RQQSOs and one LDQ in Johnson V-passband using 1.2 meter optical/IR telescope at Gurushikhar, Mount Abu, India. Observations were made in nine nights during the first half of the year 2000; seven RQQSOs: 0748+291, 0945+438, 1017+280, 1029+329, 1101+319, 1225+317, 1252+020 and one LDQ: 1103-006 were observed. RQQSOs 0748+291, 1225+317 and LDQ 1103-006 have shown existence of intra-night variations. In the case of 1017+280 (RQQSO) there is indication of intra-night variation in one night where as the observations in another night do not show convincingly the existence of intra-night variability. RQQSOs 0945+438, 1029+329, 1101+319 and 1252+020 have not shown any intra-night variations. We compiled intra-night variability data for radio-loud and radio-quiet AGNs from the literature for statistical analysis. It is found that a good fraction of radio-quiet AGNs show intra-night variations with the maximum amplitude of variation being about 10%. On the other hand blazars show at times intra-night flux variability up to 100%. In case of radio-loud AGNs (excluding blazars), maximum amplitude of intra-night variation lies between the variability amplitude of radio-quiet AGNs and blazars i.e. the flux variation is close to 50%. The results indicate that the energy generation mechanism and the environment around the central engine in different classes of AGNs may be similar, if not identical. The standard model for radio-loud AGNs, where shocks are propagating down relativistic jet or models based on disturbances in accretion disks can also explain the micro-variability in RQQSOs.
description: 12 pages, 12 figures, Accepted for publication in A & A, uses aa.cls
AN EMPIRICAL INVESTIGATION OF LIVE HOG DEMAND
Creators: name: Parcell, Joseph L.
name: Mintert, James R.
name: Plain, Ronald L.
name: Parcell, Joseph L.
name: Mintert, James R.
name: Plain, Ronald L.
Publisher: name: Unknown
Year: 2000
Subjects: subject: Demand and Price Analysis
subject: Livestock Production/Industries
subject: Live Hog Demand
subject: Structural Change
subject: Capacity Utilization

description: An inverse live hog demand model was estimated to analyze claims that the live hog own quantity demand flexibility's magnitude has increased in recent years. A second objective of this research was to estimate the impact changes in processing capacity utilization rates have on live hog prices. Iowa - Southern Minnesota barrow and gilt price was modeled as a function of average daily hog slaughter, a processing capacity utilization ratio, an index of processing and marketing costs, a retail demand shift index, pork cold storage stocks, and monthly binary variables. Results indicate that in recent years live hog prices have become more responsive to changes in hog slaughter. Additionally, changes in processing capacity utilization rates, at times, also have a relatively large impact on live hog prices. Finally, when the large live hog price decline that occurred during the fall of 1998 is examined, model results indicate that the accumulation of large pork cold storage stocks, the sharp increase in processor's capacity utilization rates, an increase in average dressed weight, and the increase in average daily hog slaughter all had a large negative effect on live hog prices.
Reparameterization Invariant Model of a Supersymmetric System: BRST and Supervariable Approaches
Creators: name: Tripathi, A.
name: Chauhan, B.
name: Rao, A. K.
name: Malik, R. P.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We carry out the Becchi-Rouet-Stora-Tyutin (BRST) quantization of the one (0 + 1)-dimensional (1D) model of a free massive spinning relativistic particle (i.e. a supersymmetric system) by exploiting its classical infinitesimal and continuous reparameterization symmetry transformations. We use the modified Bonora-Tonin (BT) supervariable approach (MBTSA) to BRST formalism to obtain the nilpotent (anti-)BRST symmetry transformations of the target space variables and the (anti-)BRST invariant Curci-Ferrari (CF)-type restriction for the 1D model of our supersymmetric (SUSY) system. The nilpotent (anti-)BRST symmetry transformations for other variables of our model are derived by using the (anti-)chiral supervariable approach (ACSA) to BRST formalism. Within the framework of the latter, we have shown the existence of the CF-type restriction by proving the (i) symmetry invariance of the coupled Lagrangians, and (ii) the absolute anticommutativity property of the conserved (anti-)BRST charges. The application of the MBTSA to a physical SUSY system (i.e. a 1D model of a massive spinning particle) is a novel result in our present endeavor. In the application of ACSA, we have considered only the (anti-)chiral super expansions of the supervariables. Hence, the observation of the absolute anticommutativity of the (anti-)BRST charges is a novel result. The CF-type restriction is universal in nature as it turns out to be the same for the SUSY and non-SUSY reparameterization (i.e. 1D diffeomorphism) invariant models of the (non-)relativistic particles.
description: LaTeX file, 38 pages, version to appear in AHEP. arXiv admin note: text overlap with arXiv:2006.07874
Cosmological nonlinear hydrodynamics with post-Newtonian corrections
Creators: name: Hwang, Jai-chan
name: Noh, Hyerim
name: Puetzfeld, Dirk
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The post-Newtonian (PN) approximation, based on the assumptions of weak gravitational fields and slow motions, provides a way to estimate general relativistic effects in the fully nonlinear evolution stage of the large-scale cosmic structures. We extend Chandrasekhar's first order PN (1PN) hydrodynamics based on the Minkowski background to the Robertson-Walker background. We assume the presence of Friedmann's cosmological spacetime as a background. In the background we include the three-space curvature, the cosmological constant and general pressure. In the Newtonian order and 1PN order we include general pressure, stress, and flux. The Newtonian hydrodynamic equations appear naturally in the 0PN order. The spatial gauge degree of freedom is fixed in a unique manner and the basic equations are arranged without taking the temporal gauge condition. In this way we can conveniently try alternative temporal gauge conditions. We investigate a number of temporal gauge conditions under which all the remaining variables are equivalently gauge-invariant. Our aim is to present the fully nonlinear 1PN equations in a form suitable for implementation in conventional Newtonian hydrodynamic simulations with minimal extensions. The 1PN terms can be considered as relativistic corrections added to the well known Newtonian equations. The proper arrangement of the variables and equations in combination with suitable gauge conditions would allow the possible future 1PN cosmological simulations to become more tractable. Our equations and gauges are arranged for that purpose. We suggest ways of controlling the numerical accuracy. The typical 1PN order terms are about $10^{-6} \sim 10^{-4}$ times smaller than the Newtonian terms.
description: 26 pages, no figure
Associated tW production at LHC: a complete calculation of electroweak supersymmetric effects at one loop
Creators: name: Beccaria, M.
name: Macorini, G.
name: Renard, F. M.
name: Verzegnassi, C.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We compute, in the MSSM framework, the total electroweak contributions at one loop for the process pp -> tW+X, initiated by the parton process bg -> tW. The supersymmetric effect is analyzed for various choices of the SUSY benchmark points. Choosing realistic unpolarized and polarized experimental quantities, we show the size of the various effects and discuss their dependence on the MSSM parameters.
description: 32 pages, 9 eps figures
Phase Diagram and Superconductivity of Calcium Borohyrides at Extreme Pressures
Creators: name: Di Cataldo, Simone
name: von der Linden, Wolfgang
name: Boeri, Lilia
Publisher: name: arXiv
Year: 2020
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Motivated by the recent discovery of near-room temperature superconductivity in high-pressure superhydrides, we investigate from first-principles the high-pressure superconducting phase diagram of the ternary Ca-B-H system, using ab-initio evolutionary crystal structure prediction, and Density Functional Perturbation Theory. We find that below 100 GPa all stable and weakly metastable phases are insulating. This pressure marks the appearance of several new chemically-forbidden phases on the hull of stability, and the first onset of metalization in CaBH$_5$. Metallization is then gradually achieved at higher pressure at different compositions. Among the metallic phases stable in the Megabar regime, we predict two high-$T_c$ superconducting phases with CaBH$_6$ and Ca$_2$B$_2$H$_{13}$ compositions, with critical temperatures of 119 and 89 K at 300 GPa, respectively, surviving to lower pressures. Ternary hydrides will most likely play a major role in superconductivity research in the coming years; our study suggests that, in order to reduce the pressure for the onset of metallicity and superconductivity, further explorations of ternary hydrides should focus on elements less electronegative than boron.
PRICE DISCOVERY FOR STOCKER CATTLE FUTURES AND OPTIONS
Creators: name: Diersen, Matthew A.
name: Klein, Nicole L.
name: Diersen, Matthew A.
name: Klein, Nicole L.
Publisher: name: Unknown
Year: 2000
Subjects: subject: Marketing
subject: FOS: Economics and business
subject: stocker cattle
subject: cross-hedging
subject: volatility
subject: limit order
subject: thin markets

description: Low trading volume in the CME stocker cattle contracts has made hedgers and speculators reluctant to use the contracts. Traders need decision tools to discover prices or to evaluate quoted prices that may not contain all the information in the market. The number of head of stocker weight cattle sold on the spot market has increased in recent years while the practice of cross-hedging stocker weight cattle against the feeder cattle contract remains risky. A model explains the spread between feeder cattle and stocker cattle futures prices as a function of feed prices, live cattle prices, and seasonal factors. The volatility of spot stocker cattle prices is comparable to spot feeder cattle prices, supporting the idea of using feeder cattle implied volatility measures as estimates of stocker cattle futures implied volatility in option pricing models. The model and relations proposed should be useful for traders evaluating observed prices or placing limit orders for stocker futures and options.
Return of the Volcano: PHENIX Azimuthal Correlations 62.4 GeV Au+Au
Creators: name: McCumber, Michael
name: Frantz, Justin
Publisher: name: arXiv
Year: 2005
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: As in previous analyses at sqrt(s_NN) 200 GeV, correlations in azimuthal angles between inclusive charge particles at intermediate transverse momentum (p_T = 1.0-4.0) GeV/c are studied at sqrt(s_NN) 62.4 GeV. The jet correlations reveal similar modification as in 200 GeV. Specifically large modification, including the "volcano" or "cone" structure, persists in the awayside correlation.
description: POSTER Proceedings for Quark Matter 2005 Conference in Hungarian Journal Acta Phys Hung
HEDGING WITH FUTURES AND OPTIONS: A DEMAND SYSTEMS APPROACH
Creators: name: Frechette, Darren L.
name: Frechette, Darren L.
Publisher: name: Unknown
Year: 2000
Subjects: subject: Marketing
subject: FOS: Economics and business
subject: Hedging
subject: Options
subject: Futures

description: The optimal hedging portfolio is shown to include both futures and options under a variety of circumstances when the marginal cost of hedging is non-zero. Futures and options are treated as substitute goods, and properties of the resulting hedging demand system are explained. The overall optimal hedge ratio is shown to increase when the marginal cost of trading options is reduced. The overall optimal hedge ratio is shown to decrease when the marginal cost of trading futures is decreased. The implication is that hedging demand can be stimulated by reducing the perceived cost of trading options, by educating hedgers about options and by initiating programs like the Dairy Options Pilot Program. The demand systems approach is applied to estimate optimal hedge ratios for dairy producers hedging corn inputs in five regions of Pennsylvania.
Assessment of Software Reliability by Object Oriented Metrics using Machine Learning Techniques
Creators: name: Dr Binod Kumar
Publisher: name: figshare
Year: 2021
Subjects: Applied Computer Science

description: Reliability of software is a distinct feature of reliability engineering. Software reliability models are used to assess reliability by fault prediction. Reliability is a real-world phenomenon with many related real-time problems. For easy, reliable and effective solution, many computational techniques have been developed. Though non-functional but significant feature of any Software is its “Quality”, which is not contented by many software products. Software defect prediction models with object-orientated metrics are used to measure the quality by identifying its defective classes. This research empirically analyses the defective classes by modelling with software failure data using the machine learning techniques and object-oriented metrics. Various models using Machine Learning algorithms like Logistic regression (LR), Decision Tree (DT), Support Vector Machine (SVM), Naïve Bayes Classifier (NB), k-Nearest Neighbour (KNN), Random Forest (RF) and Stochastic Gradient Boosting (GBM) have been developed. The fault proneness is detected for the classes of Marian Jureczko (MJ) Data sets. After analysis of Marian Jureczko Data set, it is found that RF provides optimum values for accuracy and ROC-AUC. The built RF model lies in outstanding category
SHORT-RUN DEMAND RELATIONSHIPS IN THE U.S. FATS AND OILS COMPLEX
Creators: name: Goodwin, Barry K.
name: Harper, Daniel C.
name: Schnepf, Randall D.
name: Goodwin, Barry K.
name: Harper, Daniel C.
name: Schnepf, Randall D.
Publisher: name: Unknown
Year: 2000
Subjects: Demand and Price Analysis

description: Fats and oils play a prominent role in U.S. dietary patterns. Recent concerns over the negative health consequences associated with fats and oils have led many to suspect structural change in demand conditions. We consider short run (monthly) demand relationships for edible fats and oils. In that monthly quantities of fats and oils are likely to be relatively fixed, we utilize an inverse AIDS specification. Our analysis consists of two components. In the first, we utilize a smooth transition function to model a switching inverse almost ideal demand system (IAIDS) that assesses short-run demand conditions for edible fats and oils in the U.S. Our results suggest that short-run demand conditions for fats and oils experienced a rather rapid structural shift in the early 1990s. Although this shift generally made price flexibilities more elastic, differences in flexibilities across regimes are modest in most cases. Our results suggest that decreases in marginal valuations for most fats and oils in response to consumption increases are rather small. Scale flexibilities are relatively close to -1, suggesting near homothetic preferences for fats and oils. An important distinction occurs for lard and tallow, which exhibit a very elastic scale response. This suggests that scale increases in the consumption of edible fats and oils will significantly decrease consumers' marginal valuation of these animal fats. A second segment of our analysis considers dynamic extensions to the IAIDS model that recognize habit effects. Although nested hypothesis testing supports the dynamic specification over the static IAIDS model, price and scale flexibilities are quite similar to the static case.
A hierarchical distributed predictive control approach for microgrids energy management
Creators: name: Dao, Le Anh
name: Dehghani-Pilehvarani, Alireza
name: Markou, Achilleas
name: Ferrarini, Luca
Publisher: name: arXiv
Year: 2020
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper addresses the problem of management and coordination of energy resources in a typical microgrid, including smart buildings as flexible loads, energy storages, and renewables. The overall goal is to provide a comprehensive and innovative framework to maximize the overall benefit, still accounting for possible requests to change the load profile coming from the grid and leaving every single building or user to balance between servicing those requests and satisfying his own comfort levels. The user involvement in the decision-making process is granted by a management and control solution exploiting an innovative distributed model predictive control approach with coordination. In addition, also a hierarchical structure is proposed, to integrate the distributed MPC user-side with the microgrid control, also implemented with an MPC technique. The proposed overall approach has been implemented and tested in several experiments in the laboratory facility for distributed energy systems (Smart RUE) at NTUA, Athens, Greece. Simulation analysis and results complement the testing, showing the accuracy and the potential of the method, also from the perspective of implementation.
AGRICULTURE PRODUCTIVITY IN SUB-SAHARAN AFRICA
Creators: name: Yu, Bingxin
name: Fulginiti, Lilyan E.
name: Perrin, Richard K.
name: Yu, Bingxin
name: Fulginiti, Lilyan E.
name: Perrin, Richard K.
Publisher: name: Unknown
Year: 2002
Subjects: Productivity Analysis

description: This study has estimates a Fourier flexible production frontier to examine agricultural productivity in forty-one sub-Saharan Africa (SSA) countries during 1961-1999. The primary empirical result is that only nine of these countries experienced productivity improvements, while average productivity across all counties declined at the rate of 0.57% per year.
Quasiparticles and order parameter near quantum phase transition in heavy fermion metals
Creators: name: Shaginyan, V. R.
name: Msezane, A. Z.
name: Amusia, M. Ya.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: It is shown that the Landau paradigm based upon both the quasiparticle concept and the notion of the order parameter is valid and can be used to explain the anomalous behavior of the heavy fermion metals near quantum critical points. The understanding of this phenomenon has been problematic largely because of the absence of theoretical guidance. Exploiting this paradigm and the fermion condensation quantum phase transition, we investigate the anomalous behavior of the heavy electron liquid near its critical point at different temperatures and applied magnetic fields. We show that this anomalous behavior is universal and can be used to capture the essential aspects of recent experiments on heavy-fermion metals at low temperatures.
description: 14 pages, revised and accepted by Physics Letters A
MAEC : A Movement-Assisted Energy Conserving Method in Event Driven Wireless Sensor Networks
Creators: name: Zhao, Ming
name: Chen, Zhigang
name: Deng, Xiaoheng
name: Zhang, Lianming
name: Liu, Anfeng
name: Huang, Guosheng
Publisher: name: arXiv
Year: 2005
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Energy is one of the most important resources in wireless sensor networks. Recently, the mobility of base station has been exploited to preserve the energy. But in event driven networks, the mobility issue is quite different from the continuous monitoring one because only a small portion of sensor node has data to send at one time. The number of sensor node that forward traffic should be minimized to prolong the network lifetime. In this paper, we propose a movement-assisted energy conserving method which tries to reduce the amount of forwarding sensor node by directing the base station to move close to the hotspots. This method achieves good performance especially when applied to a network with a set of cooperative mobile base station. Extensive simulation has been done to verify the effectiveness of the propose schema.
description: IEEE International Conference on Wireless Communications, Networking and Mobile Computing, 2005, to appear
PRICE DETERMINATION IN THE STRAWBERRY MARKET: A REGIONAL ANALYSIS
Creators: name: Carter, Colin A.
name: Chalfant, James A.
name: Goodhue, Rachael E.
name: Xia, Tian
name: Carter, Colin A.
name: Chalfant, James A.
name: Goodhue, Rachael E.
name: Xia, Tian
Publisher: name: Unknown
Year: 2002
Subjects: subject: Marketing
subject: FOS: Economics and business

description: We estimate five regional price determination models, four for regions in California, and one for Florida. We compare our regional California estimation results to those of an aggregate, state-level model. We use our estimation results to address three questions of interest to the strawberry industry which require a disaggregated analysis.
CONSUMER ATTITUDES TOWARDS GENETICALLY MODIFIED FOODS IN NORWAY
Creators: name: Grimsrud, Kristine M.
name: McCluskey, Jill J.
name: Loureiro, Maria L.
name: Wahl, Thomas I.
name: Grimsrud, Kristine M.
name: McCluskey, Jill J.
name: Loureiro, Maria L.
name: Wahl, Thomas I.
Publisher: name: Unknown
Year: 2002
Subjects: Consumer/Household Economics
Research and Development/Tech Change/Emerging Technologies

description: There is a lack of public acceptance of genetically modified (GM) food products in Europe. Using a dichotomous choice contingent valuation methodology, we find that willingness to accept (WTA) for GM food in Norway is positively affected (i.e. a greater discount is required) by higher levels of self-reported risk perceptions toward GM-food and preferences for domestically produced food. The estimation results show that self-reported knowledge about biotechnology increases WTA while higher levels of formal education decrease the WTA for GM-foods. Also, respondents who have a high level of concern about food safety have a higher WTA for GM food. Further, we estimate mean willingness to accept for GM food products. Our results indicate that our sample on average wants a 47.7% discount on GM bread compared to conventional bread. For GM-salmon a 56.0% discount compared to non-GM salmon is necessary.
Quasinormal modes of Rarita-Schwinger field in Reissner-Nordström black hole spacetimes
Creators: name: Shu, Fu-Wen
name: Shen, You-Gen
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The Newman-Penrose formalism is used to deal with the quasinormal modes(QNM's) of Rarita-Schwinger perturbations outside a Reissner-Nordström black hole. We obtain four kinds of possible expressions of effective potentials, which are proved to be of the same spectra of quasinormal mode frequencies. The quasinormal mode frequencies evaluated by the WKB potential approximation show that, similar to those for Dirac perturbations, the real parts of the frequencies increase with the charge $Q$ and decrease with the mode number $n$, while the dampings almost keep unchanged as the charge increases.
description: 9 pages, 2 figures
The composite X-ray spectra of radio-loud and radio-quiet SDSS quasars
Creators: name: Zhou, Minhua
name: Gu, Minfeng
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present the study on the X-ray emission for a sample of radio-detected quasars constructed from the cross-matches between SDSS, FIRST catalogs and XMM-Newton archives. A sample of radio-quiet SDSS quasars without FIRST radio detection is also assembled for comparison. We construct the optical and X-ray composite spectra normalized at rest frame $4215\,\rm Å$ (or $2200\,\rm Å$) for both radio-loud quasars (RLQs) and radio-quiet quasars (RQQs) at $z\le3.2$, with matched X-ray completeness of 19\%, redshift and optical luminosity. While the optical composite spectrum of RLQs is similar to that of RQQs, we find that RLQs have higher X-ray composite spectrum than RQQs, consistent with previous studies in the literature. By dividing the radio-detected quasars into radio loudness bins, we find the X-ray composite spectra are generally higher with increasing radio loudness. Moreover, a significant correlation is found between the optical-to-X-ray spectral index and radio loudness, and there is a unified multi-correlation between the radio, X-ray luminosities and radio loudness in radio-detected quasars. These results could be possibly explained with the corona-jet model, in which the corona and jet are directly related.
description: 14 pages, 12 figures, 6 Tables, Accepted for publication in Research in Astronomy and Astrophysics
On exotic hybrid meson production in gamma* gamma collisions
Creators: name: Anikin, I. V.
name: Pire, B.
name: Szymanowski, L.
name: Teryaev, O. V.
name: Wallon, S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present a theoretical study of exotic hybrid meson (JPC=1-+) production in photon-photon collisions where one of the photons is deeply virtual, including twist 2 and twist 3 contributions. We calculate the cross section of this process which turns out to be large enough to imply sizeable counting rates in the present high luminosity electron-positron colliders. We emphasize theimportance of the pi eta decay channel for the detection of the hybrid meson candidate pi_1(1400) and calculate the cross section and the angular distribution for pi eta pair production in the unpolarized case. This angular distribution is a useful tool for disentangling the hybrid meson signal from the background. Finally, we calculate the single spin asymmetry associated with one initial longitudinally polarized lepton.
description: 13 pages, 14 figures
Berezinskii-Kosterlitz-Thouless Phase in Two-dimensional Ferroelectrics
Creators: name: Xu, Changsong
name: Nahas, Yousra
name: Prokhorenko, Sergei
name: Xiang, Hongjun
name: Bellaiche, L.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The celebrated Berezinskii-Kosterlitz-Thouless (BKT) phase transition refers to a topological transition characterized, e.g., by the dissociation of vortex-antivortex pairs in two-dimensional (2D) systems. Such unusual phase has been reported in various types of materials, but never in the new class of systems made by one-unit-cell-thick (1UC) ferroelectrics (also coined as 2D ferroelectrics). Here, the use of a first-principles-based effective Hamiltonian method leads to the discovery of many fingerprints of a BKT phase existing in-between the ferroelectric and paraelectric states of 1UC tin tellurium being fully relaxed. Moreover, epitaxial strain is found to have dramatic consequences on the temperature range of such BKT phase for the 1UC SnTe. Consequently, our predictions extend the playground of BKT theory to a novel class of functional materials, and demonstrate that strain is an effective tool to alter BKT characteristics there.
Configuring crisis : writing, madness, and the middle voice
Creators: name: Katz, Yael
Publisher: name: University of British Columbia
Year: 2009

description: By investigating the discursive rules of hermeneutics and diagnosis, this study seeks to problematize particular presuppositions—most notably the presupposition of sense—of the modern disciplinary hermeneutic context. Following Barthes's consideration of the Greek modus of the middle voice as a useful notion in conceptualizing the modern scene of writing, the study advances itself toward conceptualizing a configuration of the modern reading scene in its middle-voiced permutation. In such a scene, the moment a reading attempts to read itself from without its parameters, it arrives at a spatial and temporal crisis (from the Greek krin-ein; to decide) between its action and the place (of not sense and not not sense) which exceeds the parameters delimiting the action of reading itself, but which nevertheless conditions its possibility. The grammar of this crisis is the middle voice; its condition, in the context of this study, is configured as madness. Madness is thus configured as a function of interrogation, reading and diagnosis. At the nucleus of the modem reading scene itself, this thesis opens with an introduction of the terms middle voice, crisis and madness, and then offers a consideration of three permutations of reading: Chapter Two, Chapter Three and the space between. Chapter Two considers a fictional representation of writing in the middle voice through a reading of Nabokov's Lolita, a text of fiction in the form of a "mad writer's" diary, whose historical reception has been marked by acts of appropriative censorship and clinical diagnosis. Chapter Three considers a permutation of the middlevoiced reading through a reading of Gertrude Stein's lectures on writing. This consideration is framed by fragments from the writing of Maurice Blanchot, connecting reading (as conceived by Stein) to madness, figuring the convergence of reading and madness in writing. The Interchapter, between chapters Two and Three, is an aporetic space entitled "Madness Itself." By allowing a brief and partial view of the modem clinical psychiatric setting, and by calling into question the parameters of the surrounding "chapters" themselves, this section seeks to perform, structurally and thematically, a moment of crisis recalling the middle voice.
WILL SAVINGS ACCOUNTS (EVER) BECOME PART OF U.S. FARM POLICY?
Creators: name: Monke, James D.
name: Durst, Ron L.
name: Monke, James D.
name: Durst, Ron L.
Publisher: name: Unknown
Year: 2002
Subjects: Agricultural and Food Policy
Agricultural Finance

description: Various forms of farmer savings accounts have been proposed to help U.S. farmers manage their income variability. Financial incentives include tax-deferral and government matching deposits. This paper estimates farmer eligibility, program size, and benefit distributions for two congressional proposals: FARRM accounts and a farm counter-cyclical savings account program.