cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Balanced Reduced-Order Models for Iterative Nonlinear Control of Large-Scale Systems
Creators: name: Huang, Yizhe
name: Kramer, Boris
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optimization and Control (math.OC)
subject: Systems and Control (eess.SY)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: We propose a new framework to design controllers for high-dimensional nonlinear systems. The control is designed through the iterative linear quadratic regulator (ILQR), an algorithm that computes control by iteratively applying the linear quadratic regulator on the local linearization of the system at each time step. Since ILQR is computationally expensive, we propose to first construct reduced-order models (ROMs) of the high-dimensional nonlinear system. We derive nonlinear ROMs via projection, where the basis is computed via balanced truncation (BT) and LQG balanced truncation (LQG-BT). Numerical experiments are performed on a semi-discretized nonlinear Burgers equation. We find that the ILQR algorithm produces good control on ROMs constructed either by BT or LQG-BT, with BT-ROM based controllers outperforming LQG-BT slightly for very low-dimensional systems.
Ordering Algorithms and Confidence Intervals in the Presence of Nuisance Parameters
Creators: name: Punzi, Giovanni
Publisher: name: arXiv
Year: 2005
Subjects: subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We discuss some issues arising in the evaluation of confidence intervals in the presence of nuisance parameters (systematic uncertainties) by means of direct Neyman construction in multi-dimensional space. While this kind of procedure provides rigorous coverage, it may be affected by large overcoverage, and/or produce results with counterintuitive behavior with respect to the uncertainty on the nuisance parameters, or other undesirable properties. We describe a choice of ordering algorithm that provides results with good general properties, the correct behavior for small uncertainties, and limited overcoverage.
description: 5 pages, 3 figures, to appear in proceedings of PhyStat2005, Oxford, UK, Sept 2005, Imperial College Press
Probing the absolute density of the Earth's core using a vertical neutrino beam
Creators: name: Winter, Walter
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: We demonstrate that one could measure the absolute matter density of the Earth's core with a vertical neutrino factory baseline at the per cent level for $\sin^2 2 θ_{13} \gtrsim 0.01$, where we include all correlations with the oscillation parameters in the analysis. We discuss the geographical feasibility of such an approach, and illustrate how the results change as a function of the detector location. We point out the complementarity to geophysics.
description: Second column in Table I corrected; 4 pages, 4 figures (color online)
WHY CAN'T U.S. BEEF COMPETE IN THE EUROPEAN UNION?
Creators: name: Clemens, Roxanne
name: Babcock, Bruce A.
name: Clemens, Roxanne
name: Babcock, Bruce A.
Publisher: name: Unknown
Year: 2002
Subjects: subject: International Relations/Trade
subject: beef hormone ban
subject: E.U. enlargement
subject: natural beef
subject: NHTC program
subject: non-hormone treated beef
subject: retaliatory tariffs
subject: traceability

description: The stringent guidelines for producing, harvesting, and shipping certified non-hormone treated beef for the European Union create additional costs that greatly reduce the competitiveness of U.S. beef. What had once been a large market for beef variety meats and then a niche market for non-treated beef has all but vanished because the E.U. hormone ban and regulations for producing and certifying non-treated beef have made U.S. product too expensive to export. Some producers continue to obtain U.S. Department of Agriculture certification for their non-hormone treated beef, but most are selling their fully traceable, certified cattle into the domestic natural beef market at no additional premium compared with cattle verified as non-treated via a producer-signed affidavit. As an international trade issue, the beef hormone ban (and U.S. retaliation) continues to play a role in policy decisions and trade negotiations. As more countries negotiate accession to the European Union, for example, the United States stands to lose additional trade potential. In addition, although retaliation appears to be blocking trade at about the appropriate level, some E.U. countries may actually be benefiting from the retaliatory duties applied to some agricultural products based on country of origin.
Nissiotis, Nikos A.: Die Theologie der Ostkirche im ökumenischen Dialog
Creators: name: Lilienfeld, Fairy Von
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 19 Nr. 1 (1970): Ökumenische Rundschau, Band 19, Heft 1
The Changing Structure of Pork Trade, Production, and Processing in Mexico
Creators: name: Batres-Marquez, S. Patricia
name: Clemens, Roxanne
name: Jensen, Helen H.
name: Batres-Marquez, S. Patricia
name: Clemens, Roxanne
name: Jensen, Helen H.
Publisher: name: Unknown
Year: 2006
Subjects: subject: Industrial Organization
subject: Marketing
subject: FOS: Economics and business
subject: Agribusiness
subject: International Relations/Trade
subject: live hogs and pork trade
subject: Mexico
subject: NAFTA
subject: pork industry
subject: pork slaughter
subject: TIF plants

description: The structure of the pork production, slaughter, and processing sectors in Mexico has changed significantly since implementation of the North American Free Trade Agreement (NAFTA) and with rising income and increased urbanization. Today, Mexico's pork industry has become more integrated and achieved greater production efficiencies in response to increasing demand for better product quality and stricter sanitary practices in production and processing pork for both the domestic market and for export. However, despite these improvements Mexico's pork industry has not kept up with the rising domestic demand, and Mexico has become an increasingly important market for the United States. A key to the development of increased trade in both live animals and pork is growth of federally inspected or "Tipo Inspección Federal" (TIF) plant production, as well as development of marketing channels and product promotion that support high-quality consumer meat products.
Comparison of restraint practices for persons with dementia residing in and outside special care units in British Columbia
Creators: name: McConnell-Barker, Michelle
Publisher: name: University of British Columbia
Year: 2009

description: The excessive use of chemical and physical restraints in intermediate care facilities has been a subject of study since the early eighties, and has produced several explanations for why restraint use continues to be practiced. One of the primary reasons often cited is that restraints are used to control "problematic behavior" commonly exhibited by a person suffering from dementia. The focus of the proposed project is to analyze whether restraint practices for residents with moderate to severe dementia differ between Special Care Units and integrated units within long term care facilities. The main objective of the study is to demonstrate whether seniors with dementia residing in Special Care Units will be less likely to encounter physical and chemical restraints than demented residents living within an integrated facility. This objective explores the assumption that Special Care Units were designed to meet the needs of residents with dementia, and therefore, care providers should be more accepting of deviant behaviours. The findings revealed that the more severe the level of memory impairment the more likely a resident would be placed in a Special Care Unit. Once located in these Special Care Units, residents were more likely to experience physical and chemical restraints than their counterparts in integrated care units.
The very low-mass population of the Corona Australis and Chamaeleon II star forming regions
Creators: name: Martí, Belén López
name: Eislöffel, Jochen
name: Mundt, Reinhard
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the results of a deep optical survey in the Corona Australis and Chamaeleon II star forming regions. Our optical photometry is combined with available near- and mid-infrared photometry to identify very low-mass candidate members in these dark clouds. In our Chamaeleon II field, only one object exhibits clear H-alpha emission, but the discrepancy between its optical and near-infrared colours suggests that it might be a foreground star. We also identify two objects without H-alpha emission that could be planetary mass members of Chamaeleon II. In Corona Australis, we find ten stars and three brown dwarf candidates in the Coronet cluster. Five of our new members are identified with ISOCAM sources. Only two of them have a mid-infrared excess, indicating the presence of an accretion disk. On the other hand, one brown dwarf candidate has a faint close companion, seen only in our deepest I-band image. For many of the candidates in both clouds, membership could not be inferred from their H-alpha emission or near-infrared colours; these objects need spectroscopic confirmation of their status.
Multi-wavelength continuum sizes of protoplanetary discs: scaling relations and implications for grain growth and radial drift
Creators: name: Tazzari, Marco
name: Clarke, Cathie J.
name: Testi, Leonardo
name: Williams, Jonathan P.
name: Facchini, Stefano
name: Manara, Carlo F.
name: Natta, Antonella
name: Rosotti, Giovanni
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We analyse spatially resolved ALMA observations at 0.9, 1.3, and 3.1 mm for the 26 brightest protoplanetary discs in the Lupus star-forming region. We characterise the discs multi-wavelength brightness profiles by fitting the interferometric visibilities in a homogeneous way, obtaining effective disc sizes at the three wavelengths, spectral index profiles and optical depth estimates. We report three fundamental discoveries: first, the millimeter continuum size - luminosity relation already observed at 0.9 mm is also present at 1.3 mm with an identical slope, and at 3.1 mm with a steeper slope, confirming that emission at longer wavelengths becomes increasingly optically thin. Second, when observed at 3.1 mm the discs appear to be only 9% smaller than when observed at 0.9 mm, in tension with models of dust evolution which predict a starker difference. Third, by forward modelling the sample of measurements with a simple parametric disc model, we find that the presence of large grains ($a_\mathrm{max}>1 $mm) throughout the discs is the most favoured explanation for all discs as it reproduces simultaneously their spectral indices, optical depth, luminosity, and radial extent in the 0.9-1.3 mm wavelength range. We also find that the observations can be alternatively interpreted with the discs being dominated by optically thick, unresolved, substructures made of mm-sized grains with a high scattering albedo.
description: MNRAS Accepted. 20 pages, 12 figures, 5 tables. Detailed fit results in Appendix E (27 pages, 78 figures), available as supplementary material. Machine-readable version of Table 1, Table 2, and Table 3 available at https://zenodo.org/record/4756381
Beef Mission 2001: Chengdu, Guangzhou, Panyu, and Hong Kong, China
Creators: name: Lonergan, Steven
name: Lonergan, Steven
Publisher: name: Unknown
Year: 2002
Subjects: subject: Marketing
subject: FOS: Economics and business
subject: International Relations/Trade
subject: beef variety meats
subject: China
subject: consumption
subject: distribution
subject: packaging
subject: production
subject: retail sector
subject: U.S. beef exports

description: The U.S. beef industry has many reasons for optimism about the potential for increasing beef and beef variety meat exports to China. China's recent accession to the World Trade Organization lowers tariff rates on imported beef muscle meats and variety meats, low per capita consumption among Chinese consumers means there is good potential for increased consumption, and increasing incomes will allow consumers to purchase more beef. In addition, the Chinese market is highly complementary to the U.S. domestic market and offers potential for additional exports of beef cuts and variety meats that are underutilized in the United States. Observations from a recent trip to China offer insight into the current and potential market for U.S. beef.
OPTIMAL TRANSBOUNDARY WATER DIVERSION: THE CASE OF THE SENEGAL RIVER
Creators: name: Hathie, Ibrahima
name: Lopez, Rigoberto A.
name: Hathie, Ibrahima
name: Lopez, Rigoberto A.
Publisher: name: Unknown
Year: 2002
Subjects: Resource /Energy Economics and Policy

description: This paper ascertains the costs and benefits of diverting water from the Senegal River. Two scenarios are compared to the status quo of inaction: the social planner and the competitive scenarios. Although these two scenarios yield positive present values of net benefits, the social planner scenario would use smaller quantities of water while providing the highest net benefits to society. Given that the benefits are one-sided while the costs are spread over several constituencies that share the river, it is possible for the gainers to compensate the losers, especially the farmers of flood recession agriculture identified as the main deprived group.
Mathematical Identity: An Investigation into the Learning Journeys of Adult Learners
Creators: name: Farhat B. Syyeda
Publisher: name: University of Leicester
Year: 2021
Subjects: Uncategorized

description: This thesis explores the learning journeys of 21 adult learners as they return to formal education and re-engage with Mathematics in an adult education college in England. The participants of this research, most of them women, were studying on adult Mathematics courses and two third of them belonged to the BAME (Black, Asian or Minority Ethnic) group. The aim of this research was to understand how learners construct and narrate their mathematical identities (MI), and how these identities evolve and develop over time. It further investigated the different factors that influenced the formation of learners’ MIs at different stages of their lives.This study was undertaken from an interpretive and sociocultural perspective and employed identity as a conceptual and analytical lens to examine learners’ relationship with Mathematics. To develop the conceptual framework for this research, I drew from the theory of social learning (Wenger, 1998), the concept of identity as recognition (Gee, 2000-2001), symbolic interactionism and the notion of I and me (Mead, 1974) and identity and agency (Cote and Levine, 2002). This study employed an ethnographic-narrative approach, and data was primarily collected through life story interviews. I worked with five different cohorts of learners studying on adult Mathematics courses over a period of 15 months and conducted 21 interviews. The life stories were analysed inductively using the holistic and categorical content and form approach (Lieblich et al., 1998).The findings of this study indicate that a combination of personal and social factors influenced identity construction. However, learners’ negative educational experiences in the past had a profound impact on their relationship with Mathematics and most of them returned to education with bruised MIs. However, as adult learners, they displayed enhanced agency and resilience and re-authored their MIs to achieve their goals. The collaborative learning environment, supportive tutors and a learner-centred approach of teaching contributed to re-forming their MIs.
Measurement of the Mass and the Width of the W Boson at LEP
Creators: name: L3 Collaboration
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The mass and the total decay width of the W boson are measured with the L3 detector at the LEP e+e- collider using W-boson pairs produced in 0.7/fb of data collected at centre-of-mass energies between 161 and 209GeV. Combining semi-leptonic and fully-hadronic final states, the mass and the width of the W boson are determined to be mW = 80.270 +/- 0.046 +/- 0.031 GeV and GW = 2.18 +/- 0.11 +/- 0.09 GeV, where the first uncertainty is statistical and the second systematic.
DO HEALTHIER DIETS COST MORE?
Creators: name: Ranney, Christine K.
name: McNamara, Paul E.
name: Ranney, Christine K.
name: McNamara, Paul E.
Publisher: name: Unknown
Year: 2002
Subjects: Food Consumption/Nutrition/Food Safety

description: Do healthier diets cost more? We estimate a hedonic regression model of the U.S. diet. Given food expenditures and information on dietary intake we infer the marginal cost of improved quality. Meeting the Pyramid recommendations implies decreased expenditures from two of the seven food groups.
Electron transport in ZnO thin films
Creators: name: Makino, T.
name: Segawa, Y.
name: Tsukazaki, A.
name: Ohtomo, A.
name: Kawasaki, M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Epitaxial, n-type ZnO films grown by a laser molecular-beam epitaxy method were investigated by the temperature-dependent Hall-effect technique. The 300-K carrier concentration and mobility were about $n_s \sim 10^{16}$ cm$^{-3}$ and 440 cm$^{2}$/Vs, respectively. Transport characteristics are calculated by solving the Boltzmann transport equation using a variational method. Mobility limit of 430 cm$^{2}$/Vs was calculated at 300 K. The temperature dependence of the mobility for an undoped film is calculated and agrees favorably well with experimental data if physical parameters are chosen so as to approach to those. In the experimental `mobility vs concentration' curve, unusual phenomenon was observed, i.e., mobilities at $n_s \sim 5\times$ 10$^{18}$ cm$^{-3}$ are significantly smaller than those at higher densities above $\sim 10^{20}$ cm$^{-3}$. It is qualitatively explained in terms of electron-plasmon interaction.
description: about 9 pages, 2 figures, 1 table, RevTex, to appear in the July 18th issue of Appl. Phys. Lett
CLIMATE CHANGE AND CROP YIELD DISTRIBUTION: SOME NEW EVIDENCE FROM PANEL DATA MODELS AND IMPLICATIONS FOR CROP INSURANCE
Creators: name: Chang, Ching-Cheng
name: Chen, Chi-Chung
name: Chang, Ching-Cheng
name: Chen, Chi-Chung
Publisher: name: Unknown
Year: 2002
Subjects: Crop Production/Industries
Environmental Economics and Policy
Risk and Uncertainty

description: This study examines the impact of climate on yield for seven major crops in Taiwan based on a pooled panel data of 15 counties over the period 1977-1996. Unit-root tests and maximum likelihood methods are explored to obtain reliable estimates. Results suggest that climate has diversified impacts on crop yields and their variability. A simple crop insurance model by Ahsan, Ali, and Kurian (1982) is shown how crop yield distribution can be the base to calculate the premium and indemnity.
A consistent and conservative volume distribution algorithm and its applications to multiphase flows using Phase-Field models
Creators: name: Huang, Ziyang
name: Lin, Guang
name: Ardekani, Arezoo M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: In the present study, the multiphase volume distribution problem, where there can be an arbitrary number of phases, is addressed using a consistent and conservative volume distribution algorithm. The proposed algorithm satisfies the summation constraint, the conservation constraint, and the \textit{consistency of reduction}. The first application of the volume distribution algorithm is to determine the Lagrange multipliers in multiphase Phase-Field models that enforce the mass conservation, and a multiphase conservative Allen-Cahn model that satisfies the \textit{consistency of reduction} is developed. A corresponding consistent and conservative numerical scheme is developed for the model. The multiphase conservative Allen-Cahn model has a better ability than the multiphase Cahn-Hilliard model to preserve under-resolved structures. The second application is to develop a numerical procedure, called the boundedness mapping, to map the order parameters, obtained numerically from a multiphase model, into their physical interval, and at the same time to preserve the physical properties of the order parameters. Along with the consistent and conservative schemes for the multiphase Phase-Field models, the numerical solutions of the order parameters are reduction consistent, conservative, and bounded, which are theoretically analyzed and numerically validated. Then, the multiphase Phase-Field models are coupled with the momentum equation by satisfying the \textit{consistency of mass conservation} and the \textit{consistency of mass and momentum transport}, thanks to the consistent formulation. It is demonstrated that the proposed model and scheme converge to the sharp-interface solution and are capable of capturing the complicated multiphase dynamics even when there is a large density and/or viscosity ratio.
description: The is an accepted manuscript
Destruction of adiabatic invariance at resonances in slow-fast Hamiltonian systems
Creators: name: Neishtadt, A. I.
name: Vasiliev, A. A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: There are many problems that lead to analysis of dynamical systems in which one can distinguish motions of two types: slow one and fast one. An averaging over fast motion is used for approximate description of the slow motion. First integrals of the averaged system are approximate first integrals of the exact system, i.e. adiabatic invariants. Resonant phenomena in fast motion (capture into resonance, scattering on resonance) lead to inapplicability of averaging, destruction of adiabatic invariance, dynamical chaos and transport in large domains in the phase space. In the paper perturbation theory methods for description of these phenomena are outlined. We also consider as an example the problem of surfatron acceleration of a relativistic charged particle.
description: The paper is based on a talk given at the COULOMB'05 Workshop on High Intensity Beam Dynamics, 7 pages
Oscillation modes of relativistic slender tori
Creators: name: Blaes, O. M.
name: Arras, P.
name: Fragile, P. C.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Accretion flows with pressure gradients permit the existence of standing waves which may be responsible for observed quasi-periodic oscillations (QPO's) in X-ray binaries. We present a comprehensive treatment of the linear modes of a hydrodynamic, non-self-gravitating, polytropic slender torus, with arbitrary specific angular momentum distribution, orbiting in an arbitrary axisymmetric spacetime with reflection symmetry. We discuss the physical nature of the modes, present general analytic expressions and illustrations for those which are low order, and show that they can be excited in numerical simulations of relativistic tori. The mode oscillation spectrum simplifies dramatically for near Keplerian angular momentum distributions, which appear to be generic in global simulations of the magnetorotational instability. We discuss our results in light of observations of high frequency QPO's, and point out the existence of a new pair of modes which can be in an approximate 3:2 ratio for arbitrary black hole spins and angular momentum distributions, provided the torus is radiation pressure dominated. This mode pair consists of the axisymmetric vertical epicyclic mode and the lowest order axisymmetric breathing mode.
description: submitted to MNRAS
Discophrya ochthebii Matthes 1954
Creators: name: Mariño-Pérez, Ricardo
name: Dovgal, Igor
name: Mayén-Estrada, Rosaura
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Chromista
Ciliophora
Kinetofragminophora
Suctorida
Dendrosomatidae
Discophrya
Discophrya ochthebii

description: Discophrya ochthebii Matthes, 1954
Fig. 3 a.
Suctorian ciliate with flattened disk-like body, and cone-shaped short stalk with transversal ridges. Numerous long, clavate, contractile tentacles distributed over edge of body. Macronucleus spherical or ovoid, centrally located. A group (12–29) of contractile vacuoles placed near edges of body, or (when their number is greatest) thorough the body is characteristic. Reproduction by inversogemmic budding.
Dimensions: body length 26–50; body width 43–69; macronucleus 4–9 x 21–32; contractile vacuole diameter 3–4; length of tentacles 23–26; width of apical part of stalk 26–31. Previous measurements: body length 40–91; body width 43–124; length of stalk 9–45.
Material examined. Found as epibiont of: Plea leachi. Ukraine. Small lake in high-water bed of Psel river near mouth of Ol’shanka river. 16.07.1988. Former river-bed of Goryn’ river near village Stavok, Rovno region. 0 4.07.1985. Small lake in high-water bed of Dnieper river (left bank) near Kiev. 0 7.08.1985. River Oster near city Nezhyn, Chernigov region. 17.09.1985. Small lake in high-water bed of Dnieper river (left bank) near Kiev. 24.11.1985. Lake Lyubyaz’ near village Lyubyaz’ (high-water bed of Pripyat’ river), Volyn’ region. 0 8.06.1986. Small lake in high-water bed of Pripyat’ river near village Kopachi, (zone of Chernobyl’ accident). 11.06.1987. Former river-bed of Psel river near village Vorozhba, Sumy region. 13.07.1988. Former river-bed of Psel river near village Sary, Poltava region. 21.07.1988. Small lake in high-water bed of Psel river near villages Perevoz and Savintcy Poltava region. 22.07.1988. Small lake in high-water bed of Severskij Donets river near village Cherkasskij Bishkin’, Kharkov region. 10.08.1989. Small lake in high-water bed of Severskij Donets river near village Morozovka, Kharkov region. 11.08.1992. Small lake in high-water bed of Vorskla river near village Luchki, Poltava region. 0 7.07.1997. Small lake in high-water bed of Psel river near village Borovoe, Sumy region. 11.07.1988.
Additional records. On aquatic coleopteran Ochthebius sp. Thomson (Matthes et al. 1988).
description: Published as part of Mariño-Pérez, Ricardo, Dovgal, Igor & Mayén-Estrada, Rosaura, 2011, New records of suctorians (Ciliophora: Suctoria) as epibionts of aquatic true bugs (Hemiptera: Prosorrhyncha: Nepomorpha) from two regions: Mexico and Eastern Europe, pp. 48-60 in Zootaxa 2798 on page 57, DOI: 10.5281/zenodo.277026
Continuous quantum feedback of coherent oscillations in a solid-state qubit
Creators: name: Zhang, Qin
name: Ruskov, Rusko
name: Korotkov, Alexander N.
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: We have analyzed theoretically the operation of the Bayesian quantum feedback of a solid-state qubit, designed to maintain perfect coherent oscillations in the qubit for arbitrarily long time. In particular, we have studied the feedback efficiency in presence of dephasing environment and detector nonideality. Also, we have analyzed the effect of qubit parameter deviations and studied the quantum feedback control of an energy-asymmetric qubit.
description: 11 pages
QUALITY INDICATORS AND INTERMEDIATE PRODUCTS: A NON-PARAMETRIC APPROACH
Creators: name: Zago, Angelo M.
name: Zago, Angelo M.
Publisher: name: Unknown
Year: 2002
Subjects: subject: Marketing
subject: FOS: Economics and business

description: In this paper we propose a methodology to measure the characteristics and composition of intermediate products using productivity indicators based on directional distance functions. We evaluate how quality attributes interact with the quantity level in grapes production, and find evidence of a trade-off between quantity and aggregate quality for Chardonnay.
AoI Minimization in Status Update Control with Energy Harvesting Sensors
Creators: name: Hatami, Mohammad
name: Leinonen, Markus
name: Codreanu, Marian
Publisher: name: arXiv
Year: 2020
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Information freshness is crucial for time-critical IoT applications, e.g., monitoring and control systems. We consider an IoT status update system with multiple users, multiple energy harvesting sensors, and a wireless edge node. The users receive time-sensitive information about physical quantities, each measured by a sensor. Users send requests to the edge node where a cache contains the most recently received measurements from each sensor. To serve a request, the edge node either commands the sensor to send a status update or retrieves the aged measurement from the cache. We aim at finding the best actions of the edge node to minimize the age of information of the served measurements. We model this problem as a Markov decision process and develop reinforcement learning (RL) algorithms: model-based value iteration and model-free Q-learning methods. We also propose a Q-learning method for the realistic case where the edge node is informed about the sensors' battery levels only via the status updates. The case under transmission limitations is also addressed. Furthermore, properties of an optimal policy are analytically characterized. Simulation results show that an optimal policy is a threshold-based policy and that the proposed RL methods significantly reduce the average cost compared to several baselines.
description: 33 pages, 6 figures
Complete electroweak O(alpha) corrections to charged-current e+e- --> 4fermion processes
Creators: name: Denner, A.
name: Dittmaier, S.
name: Roth, M.
name: Wieders, L. H.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The complete electroweak O(alpha) corrections are calculated for the charged-current four-fermion production processes e+e- --> nu_tau tau+ mu- anti-nu_mu, u anti-d mu- anti-nu_mu, and u anti-d s anti-c. The calculation is performed using complex gauge-boson masses, supplemented by complex couplings to restore gauge invariance. The evaluation of the occurring one-loop tensor integrals, which include 5- and 6-point functions, requires new techniques. Explicit numerical results are presented for total cross sections in the energy range from the W-pair-production threshold region up to a scattering energy of 2TeV. A comparison with the predictions based on the "double-pole approximation" (DPA) provided by the generator RacoonWW reveals corrections beyond DPA of < 0.5% in the energy range 170-300GeV, in agreement with previous estimates for the intrinsic DPA uncertainty. The difference to the DPA increases to 1-2% for sqrt{s} = 1-2TeV. At threshold, where the DPA becomes unreliable, the full O(alpha) calculation corrects an improved Born approximation (IBA) by about 1.6%, also consistent with an error estimate of the IBA.
description: 14 pages, latex, 4 postscript figures; error in implementation of complex-mass scheme corrected, relative corrections shifted by 0.4-0.5%
SU(2) Gluodynamics and HP1 sigma-model embedding: Scaling, Topology and Confinement
Creators: name: Boyko, P. Yu.
name: Gubarev, F. V.
name: Morozov, S. M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate recently proposed HP1 sigma-model embedding method aimed to study the topology of SU(2) gauge fields. The HP1 based topological charge is shown to be fairly compatible with various known definitions. We study the corresponding topological susceptibility and estimate its value in the continuum limit. The geometrical clarity of HP1 approach allows to investigate non-perturbative aspects of SU(2) gauge theory on qualitatively new level. In particular, we obtain numerically precise estimation of gluon condensate and its leading quadratic correction. Furthermore, we present clear evidences that the string tension is to be associated with global (percolating) regions of sign-coherent topological charge. As a byproduct of our analysis we estimate the continuum value of quenched chiral condensate and the dimensionality of regions, which localize the lowest eigenmodes of overlap Dirac operator.
description: 22 pages, 18 ps figures, revtex4. Replaced to match published version (PRD, to appear)
Homotopic Action: A Pathway to Convergent Diagrammatic Theories
Creators: name: Kim, Aaram J.
name: Prokof'ev, Nikolay V.
name: Svistunov, Boris V.
name: Kozik, Evgeny
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The major obstacle preventing Feynman diagrammatic expansions from accurately solving many-fermion systems in strongly correlated regimes is the series slow convergence or divergence problem. Several techniques have been proposed to address this issue: series resummation by conformal mapping, changing the nature of the starting point of the expansion by shifted action tools, and applying the homotopy analysis method to the Dyson-Schwinger equation. They emerge as dissimilar mathematical procedures aimed at different aspects of the problem. The proposed homotopic action offers a universal and systematic framework for unifying the existing -- and generating new -- methods and ideas to formulate a physical system in terms of a convergent diagrammatic series. It eliminates the need for resummation, allows one to introduce effective interactions, enables a controlled ultraviolet regularization of continuous-space theories, and reduces the intrinsic polynomial complexity of the diagrammatic Monte Carlo method. We illustrate this approach by an application to the Hubbard model.
description: 6 pages, 3 figures
TeV neutrinos from microquasars in compact massive binaries
Creators: name: Bednarek, W.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We consider a compact binary system in which a Wolf-Rayet star supplies matter onto a stellar mass black hole or a neutron star. This matter forms an accretion disk which ejects a jet as observed in Galactic microquasars. A part of the jet kinetic energy, typically 10%, can be transfered to relativistic nuclei. These nuclei lose nucleons as a result of photo-disintegration process in collisions with thermal photons from the accretion disk and the massive star. Due to the head on photon-nucleus collisions most of neutrons released from nuclei move towards the surface of the accretion disk and/or the massive star producing neutrinos in collisions with the matter. We calculate the spectra of muon neutrinos and expected neutrino event rates in a 1 km^2 neutrino detector of the IceCube type from a microquasar inside our Galaxy applying, as an example, the parameters of the Cyg X-3 binary system, provided that nuclei are accelerated to the Lorentz factors above 10^6 with the power law spectrum with an index close to 2.
description: 13 pages, 2 figures, ApJ, accepted
ESTIMATION OF A DEMAND SYSTEM WITH LIMITED DEPENDENT VARIABLES
Creators: name: Huang, Chung L.
name: Yen, Steven T.
name: Huang, Chung L.
name: Yen, Steven T.
Publisher: name: Unknown
Year: 2002
Subjects: Demand and Price Analysis

description: The study employs the full-information maximum-likelihood method to estimate a censored translog demand system. U.S. household consumption of steak, roast, and ground beef are used to demonstrate the application of the estimation procedure. The proposed methodology produces more efficient estimates than the popular two-step procedures found in demand literature.
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title: ÑÐ¿ÐµÑÐ¸Ð°Ð»ÑÐ½Ð¾ÑÑÑ 1.5.2. ÐÐ¸Ð¾ÑÐ¸Ð·Ð¸ÐºÐ°
titleType: Subtitle
Creators: name: ÐÐ¼Ð¸ÑÑÐ¸ÐµÐ²Ð°, ÐÐ»Ð¸Ð½Ð°
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2023
Subjects: ÐÐ¸Ð¾ÑÐ¸Ð·Ð¸ÐºÐ°
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description: Ð ÑÐ°Ð±Ð¾ÑÐµ Ð¿ÑÐµÐ´Ð»Ð°Ð³Ð°ÐµÑÑÑ Ð½Ð¾Ð²ÑÐ¹ Ð¼ÐµÑÐ¾Ð´ Ð¾Ð±ÑÐµÐºÑÐ¸Ð²Ð½Ð¾Ð¹ Ð¾ÑÐµÐ½ÐºÐ¸ Ð±Ð¾Ð»ÐµÐ²Ð¾Ð³Ð¾ ÑÐ¸Ð½Ð´ÑÐ¾Ð¼Ð° Ð¼ÐµÑÑÐ½Ð¾Ð³Ð¾ Ð¿Ð°ÑÐ¾Ð³ÐµÐ½ÐµÐ·Ð° Ð¾Ð¿Ð¾ÑÐ½Ð¾-Ð´Ð²Ð¸Ð³Ð°ÑÐµÐ»ÑÐ½Ð¾Ð³Ð¾ Ð°Ð¿Ð¿Ð°ÑÐ°ÑÐ°. ÐÐ½Ð°Ð»Ð¸Ð· Ð¿ÑÐ¾Ð²Ð¾Ð´Ð¸ÑÑÑ Ð¿ÑÑÑÐ¼ Ð¿Ð¾Ð´Ð°ÑÐ¸ ÐºÐ¾Ð½ÑÑÐ¾Ð»ÑÐ½ÑÑ Ð¸Ð¼Ð¿ÑÐ»ÑÑÐ¾Ð² Ñ Ð·Ð°Ð´Ð°Ð½Ð½ÑÐ¼Ð¸ Ð¿Ð°ÑÐ°Ð¼ÐµÑÑÐ°Ð¼Ð¸ Ð² Ð¿ÑÑÐ¼Ð¾Ð¹ Ð¿ÑÐ¾ÐµÐºÑÐ¸Ð¸ ÑÑÐ±ÑÐµÐºÑÐ¸Ð²Ð½Ð¾ Ð±Ð¾Ð»ÐµÐ²Ð¾Ð¹ Ð·Ð¾Ð½Ñ Ð½Ð° ÐºÐ¾Ð¶Ñ Ð¸ ÑÐ¾ÑÐµÐ´Ð½Ð¸Ðµ Ð¾Ð±Ð»Ð°ÑÑÐ¸, Ð¿Ð¾ÑÐ»Ðµ ÑÐµÐ³Ð¾ ÑÐµÐ³Ð¸ÑÑÑÐ¸ÑÑÐµÑÑÑ ÑÐ°Ð·Ð±ÑÐ¾Ñ Ð¿Ð¾Ð»ÑÑÐµÐ½Ð½ÑÑ Ð´Ð°Ð½Ð½ÑÑ.
Bounds for the refractive indices of metamaterials
Creators: name: Skaar, Johannes
name: Seip, Kristian
Publisher: name: arXiv
Year: 2005
Subjects: subject: Optics (physics.optics)
subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: The set of realizable refractive indices as a function of frequency is considered. For passive media we give bounds for the refractive index variation in a finite bandwidth. Special attention is given to the loss and index variation in the case of left-handed materials.
description: 7 pages, 1 figure
SEDIMENTATION OF RESERVOIRS: PREVENTION VS CLEANUP
Creators: name: Kapadia, Mustafa
name: Shah, Farhed A.
name: Warner, Glenn
name: Kapadia, Mustafa
name: Shah, Farhed A.
name: Warner, Glenn
Publisher: name: Unknown
Year: 2002
Subjects: Resource /Energy Economics and Policy

description: Soil erosion from cropland contributes significantly to reducing storage capacity in reservoirs. A model is developed for comparing economic desirability of various catchment level soil conservation practices. Results from an illustrative case study show that prevention of sediment accumulation can be much more economical than sediment removal at the reservoir level.
5-Dimensional Space-Periodic Solutions of the Static Vacuum Einstein Equations
Creators: name: Khuri, Marcus
name: Weinstein, Gilbert
name: Yamada, Sumio
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Differential Geometry (math.DG)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: An affirmative answer is given to a conjecture of Myers concerning the existence of 5-dimensional regular static vacuum solutions that balance an infinite number of black holes, which have Kasner asymptotics. A variety of examples are constructed, having different combinations of ring $S^1\times S^2$ and sphere $S^3$ cross-sectional horizon topologies. Furthermore, we show the existence of 5-dimensional vacuum solitons with Kasner asymptotics. These are regular static space-periodic vacuum spacetimes devoid of black holes. Consequently, we also obtain new examples of complete Riemannian manifolds of nonnegative Ricci curvature in dimension 4, and zero Ricci curvature in dimension 5, having arbitrarily large as well as infinite second Betti number.
description: 16 pages
Far-infrared spectra of lateral quantum dot molecules
Creators: name: Helle, M.
name: Harju, A.
name: Nieminen, R. M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study effects of electron-electron interactions and confinement potential on the magneto-optical absorption spectrum in the far-infrared range of lateral quantum dot molecules. We calculate far-infrared (FIR) spectra for three different quantum dot molecule confinement potentials. We use accurate exact diagonalization technique for two interacting electrons and calculate dipole-transitions between two-body levels with perturbation theory. We conclude that the two-electron FIR spectra directly reflect the symmetry of the confinement potential and interactions cause only small shifts in the spectra. These predictions could be tested in experiments with nonparabolic quantum dots by changing the number of confined electrons. We also calculate FIR spectra for up to six noninteracting electrons and observe some additional features in the spectrum.
description: For better quality Figs download manuscript from http://www.fyslab.hut.fi/~mma/FIR/Helle_qdmfir.ps.gz
RESOURCE OR NUISANCE? MANAGING AFRICAN ELEPHANTS AS A MULTI-USE SPECIES
Creators: name: Horan, Richard D.
name: Bulte, Erwin H.
name: Horan, Richard D.
name: Bulte, Erwin H.
Publisher: name: Unknown
Year: 2001
Subjects: Resource /Energy Economics and Policy

description: Increasing human interference with natural systems causes us to re-think our perception of wildlife species and the economic choices society makes with regards to their management. Accordingly, we generalize existing 'bioeconomic' models by proposing an economically-based classification of species. The theoretical model is applied to the case of African elephant management. We demonstrate that the classification of the steady state population of a species depends on both species' density and economic factors. Our main results are threefold. First, we demonstrate the classification-dependent possibility of multiple equilibria and perverse comparative statics for multi-use species. Second, upon comparing the optimal stock of a multi-use species to the stock under an open access regime, we find that the ranking in terms of abundance is ambiguous. Finally, and consistent with existing literature on resource management in a second-best world, our case study supports the idea that trade measures have ambiguous effects on wildlife abundance under open access.
Optical response of many-polaron systems
Creators: name: Wellein, G.
name: Bishop, A. R.
name: Hohenadler, M.
name: Schubert, G.
name: Fehske, H.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Exact results for the density of states and the ac conductivity of the spinless Holstein model at finite carrier density are obtained combining Lanczos and kernel polynomial methods.
description: 2 pages, 1 figure, submitted to SCES05
Stabilized antisense-lipid particles with enhanced intracellular delivery properties
Creators: name: Louie, Lenore Jennifer
Publisher: name: University of British Columbia
Year: 2009

description: Effective systemic delivery systems for DNA and RNA are essential to the successful clinical application of genetic drugs. Liposomal formulations of genetic drugs, such as antisense oligonucleotides (AS-ODN) and plasmid DNA, are difficult to achieve as the large size and highly charged nature of these molecules mitigates against the formation of small, neutral, serum stable carriers, which are required to achieve the long circulation times necessary for efficient delivery to disease sites such as tumors. Stabilized antisense-lipid particles (SALPs) are liposomal carriers of antisense oligonucleotides that exhibit high antisense-to-lipid ratios, long circulation lifetimes and accumulate preferentially at disease sites. As a result of high encapsulation efficiencies, SALPs are able to deliver large quantities of AS-ODN to target tissues. However, SALPs are relatively ineffective at delivering antisense molecules inside target cells. For AS-ODN to be effective in inhibiting gene expression, they must be internalized by the target cell, effectively released from endosomal compartments and translocated to the nucleus, their primary site of action. The studies conducted in this thesis examined methods to enhance the intracellular delivery of antisense oligonucleotides contained within SALP systems. In particular, we examined the effect of a surface associated cationic PEG-lipid (CPL4) on increasing cellular uptake of SALPs. Subsequent studies investigated the ability of dioleoylphosphatidylethanolamine (DOPE) in SALP systems to enhance nuclear delivery of AS-ODN sequences by promoting endosome destabilization. It is shown that the incorporation of CPL4 into distearylphosphatidylcholine/ cholesterol/ l,2-dioleoyl-3-[N,N-dimethylamino]propane/ PEG-CeramideC₁₄ (20/45/25/10 mol%) SALP was successful in increasing the cellular internalization of these vesicles but did not result in increased nuclear delivery of AS-ODN. Nuclear accumulation of oligonucleotides was achieved through the use of a novel formulation, DODAP/DOPE/PEGCer- Ci4, in which the fusogenic lipid DOPE was substituted for DSPC. However, these liposomes are unstable. Reasons for SALP instability are discussed as are ways to improve the stability and intracellular delivery properties of SALP.
STRUCTURAL CHANGE, RENTS TRANSFERRING AND MARKET POWER IN THE INTERNATIONAL COFFEE MARKET: A TIME SERIES ANALYSIS
Creators: name: Gomez, Miguel I.
name: Castillo, Mauricio
name: Gomez, Miguel I.
name: Castillo, Mauricio
Publisher: name: Unknown
Year: 2001
Subjects: Industrial Organization

description: The breakdown of the International Coffee Agreement (an oligopoly of exporting countries) in 1990 led to increasing competition for market share. We use an econometric model to examine the effects of the agreement's dissolution. Results suggest a transfer of rents from producers to wholesalers and little impact on consumers.
Band gaps of crystalline solids from Wannier-localization based optimal tuning of a screened range-separated hybrid functional
Creators: name: Wing, Dahvyd
name: Ohad, Guy
name: Haber, Jonah B.
name: Filip, Marina R.
name: Gant, Stephen E.
name: Neaton, Jeffrey B.
name: Kronik, Leeor
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Accurate prediction of fundamental band gaps of crystalline solid state systems entirely within density functional theory is a long standing challenge. Here, we present a simple and inexpensive method that achieves this by means of non-empirical optimal tuning of the parameters of a screened range-separated hybrid functional. The tuning involves the enforcement of an ansatz that generalizes the ionization potential theorem to the removal of an electron in an occupied state described by a localized Wannier function in a modestly sized supercell calculation. The method is benchmarked against experiment for a set of systems ranging from narrow band gap semiconductors to large band gap insulators, spanning a range of fundamental band gaps from 0.2 to 14.2 eV and is found to yield quantitative accuracy across the board, with a mean absolute error of $\sim$0.1 eV and a maximal error of $\sim$0.2 eV.
description: 10 pages, 2 figures