cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Path Planning in a Riemannian Manifold using Optimal Control
Creators: name: Mazumdar, Souma
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: 49J15, 49K15, 53Z05, 34H05

description: We consider the motion planning of an object in a Riemannian manifold where the object is steered from an initial point to a final point utilizing optimal control. Considering Pontryagin Minimization Principle we compute the Optimal Controls needed for steering the object from initial to final point. The Optimal Controls were solved with respect to time t and shown to have norm 1 which should be the case when the extremal trajectories, which are the solutions of Pontryagin Principle, are arc length parametrized. The extremal trajectories are supposed to be the geodesics on the Riemannian manifold. So we compute the geodesic curvature and the Gaussian curvature of the Riemannian structure.
description: 18 pages no figures
Technology-Climate Interactions in the Green Revolution in India
Creators: name: McKinsey, James W.
name: Evenson, Robert E.
name: McKinsey, James W.
name: Evenson, Robert E.
Publisher: name: Unknown
Year: 1999
Subjects: subject: International Development
subject: Green Revolution
subject: India
subject: HYV
subject: rice
subject: wheat
subject: climate
subject: agricultural research

description: This paper presents a model of the Green Revolution in India, in which the development and diffusion of HYVs, the expansion of irrigation and the expansion of multiple-cropping are treated as endogenous responses to more basic investments in agricultural technology and infrastructure, as well as to climate and edaphic endowments. We incorporate explicit climate-technology interactions in the model, in order to identify climate effects on the diffusion of HYVs, irrigation and multiple-cropping, and on Net Revenue to agriculture. We find that climate affects technology development and diffusion, and that technology development and diffusion affect the impacts of climate on agricultural productivity in India.
Nedungatt, George und J. S.: Laity and Church Temporalities
Creators: name: Kaufhold, Hubert
Publisher: name: Oriens christianus : Hefte für die Kunde des christlichen Orients
Year: 2024

description: Oriens christianus : Hefte für die Kunde des christlichen Orients, Bd. 86 (2002): Oriens christianus, Band 86
Multiple Job Holding in Russia During Economic Transition
Creators: name: Foley, Mark C.
name: Foley, Mark C.
Publisher: name: Unknown
Year: 1997
Subjects: subject: Labor and Human Capital
subject: multiple job holding
subject: economic transition
subject: Russia

description: This article analyzes multiple job holding in the context of economic transition. Evidence from a nationally representative longitudinal survey of Russian citizens is used to characterize secondary jobs and second job holders, with emphasis on the determinants of multiple job holding. There has been a marked increase in multiple job holding, rising from 5.6 percent overall in 1992 to 10.1 percent in 1996. Economic conditions prevalent in Russia's labor market are found to strongly affect secondary job activity. Workers who have experienced wage arrears, been placed on involuntary leave, or are working less than full-time are all significantly more likely to take on second jobs. Higher education nearly doubles this probability. As transition has progressed, women have become not only much less likely to engage in additional work, but those that do so receive significantly lower second-job wages, with a gender wage gap of 68 percent, over 3 times that for primary jobs. Marriage and young children are associated with lower multiple job holding rates for women.
G0.57-0.018: A young supernova remnant? INTEGRAL and VLA observations
Creators: name: Renaud, M.
name: Paron, S.
name: Terrier, R.
name: Lebrun, F.
name: Dubner, G.
name: Giacani, E.
name: Bykov, A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report INTEGRAL/IBIS gamma-ray and VLA radio observations of G0.570-0.018, a diffuse X-ray source recently discovered by ASCA and Chandra in the Galactic center region. Based on its spectrum and morphology, G0.570-0.018 has been proposed to be a very young supernova remnant. In this scenario, the presence of gamma-ray lines coming from the short-lived radioactive nucleus 44Ti as well as synchrotron radio continuum emission are expected. The first could provide informations on nucleosynthesis environments in the interior of exploding stars, the latter could probe the interaction between the supernova blast wave and the circumstellar/interstellar matter. We have not detected 44Ti lines nor any conspicuous radio feature associated with this source down to the achieved sensitivities. From the derived upper limits we set constraints on the nature of G0.570-0.018.
description: 17 pages, 4 figures, accepted for publication in ApJ
Baum, Wilhelm und Senoner, Raimund: Indien und Europa im Mittelalter
Creators: name: Kaufhold, Hubert
Publisher: name: Oriens christianus : Hefte für die Kunde des christlichen Orients
Year: 2024

description: Oriens christianus : Hefte für die Kunde des christlichen Orients, Bd. 86 (2002): Oriens christianus, Band 86
An Exchange Identity for Non-Linear Fields
Creators: name: Jaffe, Arthur
name: Jaekel, Christian
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Operator Algebras (math.OA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We establish a useful identity for intertwining a creation or annihilation operator with the heat kernel of a self-interacting bosonic field theory.
description: 7 pages, Latex
Modelling of voltage-dependent gating and sodium currents in the Kv1.5 potassium channel
Creators: name: Hesketh, John Christian
Publisher: name: University of British Columbia
Year: 2009

description: Activation gating in voltage-gated potassium channels involves multiple closed-closed transitions prior to channel opening. We have examined various voltage-dependent properties of activation gating in the human Kvl.5 potassium channel heterologously expressed in HEK-293 cells. Two gating charge systems have been described in another voltage-gated potassium channel, Shaker, and the analogous charge systems in Kvl.5 share similar features with Shaker. These two charge systems, Ql and Q2, had characteristic voltage-dependence and sensitivity with Wi values of-29.6 ± 1.6 mV, and -2.19 ± 2.09 mV, and effective valences of 1.87 ±0.15 and 5.53 ± 0.27 (e⁻) respectively. The contribution to total gating charge was 0.20 ± 0.04 for Q l , and 0.80 ±0.04 (n=5) for Q2. Using the drug 4-AP to isolate early gating transitons, Ql and Q2 were found to move in a sequential manner during activation. Gating currents resulting from the movement of these two charge systems were modelled with a simple linear sequential scheme and activation gating was considered with respect to gating in other voltage-gated potassium channels and compared with other kinetic models of channel activation. A concerted opening transition was added to this gating current model and the model was used to simulate sodium ionic currents through Kvl.5 channels. C-type inactivated Kvl.5 channels were found to conduct small Na+ ionic currents, while remaining K ⁺ impermeant. Experimental observations and modelling of this ionic current revealed a high Na+ conducting state during recovery from inactivation and a role for external NA ⁺ in the modulation of fast recovery from inactivation was uncovered.
Risk, Network Quality, and Family Structure: Child Fostering Decisions in Burkina Faso
Creators: name: Akresh, Richard
name: Akresh, Richard
Publisher: name: Unknown
Year: 2005
Subjects: subject: Consumer/Household Economics
subject: child fostering
subject: risk-coping
subject: social networks
subject: household structure

description: Researchers often assume household structure is exogenous, but child fostering, the institution in which parents send their biological children to live with another family, is widespread in sub- Saharan Africa and provides evidence against this assumption. Using data I collected in Burkina Faso, I analyze a household's decision to adjust its size and composition through fostering. A household fosters children as a risk-coping mechanism in response to exogenous income shocks, if it has a good social network, and to satisfy labor demands within the household. Increases of one standard deviation in a household's agricultural shock, percentage of good network members, or number of older girls increase the probability of sending a child above the current fostering level by 29.1, 30.0, and 34.5 percent, respectively. Testing whether factors influencing the sending decision have an opposite impact on the receiving decision leads to a rejection of the symmetric, theoretical model for child fostering.
Alpha clustering and alpha-capture reaction rate from ab initio symmetry-adapted description of $^{20}$Ne
Creators: name: Dreyfuss, A. C.
name: Launey, K. D.
name: Escher, J. E.
name: Sargsyan, G. H.
name: Baker, R. B.
name: Dytrych, T.
name: Draayer, J. P.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Theory (nucl-th)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We introduce a new framework for studying clustering and for calculating alpha partial widths using ab initio wave functions. We demonstrate the formalism for $^{20}$Ne, by calculating the overlap between the $^{16}$O$+α$ cluster configuration and states in $^{20}$Ne computed in the ab initio symmetry-adapted no-core shell model. We present spectroscopic amplitudes and spectroscopic factors, and compare those to no-core symplectic shell-model results in larger model spaces, to gain insight into the underlying physics that drives alpha-clustering. Specifically, we report on the alpha partial width of the lowest $1^-$ resonance in $^{20}$Ne, which is found to be in good agreement with experiment. We also present first no-core shell-model estimates for asymptotic normalization coefficients for the ground state, as well as for the first excited $4^{+}$ state in $^{20}$Ne that lies in a close proximity to the $^{16}$O$+α$ threshold. This outcome highlights the importance of correlations for developing cluster structures and for describing alpha widths. The widths can then be used to calculate alpha-capture reaction rates for narrow resonances of interest to astrophysics. We explore the reaction rate for the alpha-capture reaction $^{16}$O$(α,γ)^{20}$Ne at astrophysically relevant temperatures and determine its impact on simulated X-ray burst abundances.
description: 16 pages, 7 figures
Additional file 1 of Damage control strategy in perforated diverticulitis with generalized peritonitis
Creators: name: Sohn, Maximilian
name: Agha, Ayman
name: Iesalnieks, Igors
name: Gundling, Felix
name: Presl, Jaroslav
name: Hochrein, Alfred
name: Tartaglia, Dario
name: Brillantino, Antonio
name: Perathoner, Alexander
name: Pratschke, Johann
name: Aigner, Felix
name: Ritschl, Paul
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Cell Biology
subject: Physiology
subject: FOS: Biological sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Cancer

description: Additional file 1: Prisma checklist.
Spectropolarimetric investigation of the propagation of magnetoacoustic waves and shock formation in sunspot atmospheres
Creators: name: Centeno, Rebecca
name: Collados, Manuel
name: Bueno, Javier Trujillo
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Velocity oscillations in sunspot umbrae have been measured simultaneously in two spectral lines: the photospheric Silicon I 10827 A line and the chromospheric Helium I 10830 A multiplet. From the full Stokes inversion of temporal series of spectropolarimetric observations we retrieved, among other parameters, the line of sight velocity temporal variations at photospheric and chromospheric heights. Chromospheric velocity oscillations show a three minute period with a clear sawtooth shape typical of propagating shock wave fronts. Photospheric velocity oscillations have basically a five minute period, although the power spectrum also shows a secondary peak in the three minute band which has proven to be predecessor for its chromospheric counterpart. The derived phase spectra yield a value of the atmospheric cut-off frequency around 4 mHz and give evidence for the upward propagation of higher frequency oscillation modes. The phase spectrum has been reproduced with a simple model of linear vertical propagation of slow magneto-acoustic waves in a stratified magnetized atmosphere that accounts for radiative losses through Newton's cooling law. The model explains the main features in the phase spectrum, and allows us to compute the theoretical time delay between the photospheric and chromospheric signals, which happens to have a strong dependence on frequency. We find a very good agreement between this and the time delay obtained directly from the cross-correlation of photospheric and chromospheric velocity maps filtered around the 6 mHz band. This allows us to infer that the 3-minute power observed at chromospheric heights comes directly from the photosphere by means of linear wave propagation, rather than from non-linear interaction of 5-minute (and/or higher frequency) modes.
description: aastex preprint, 32 pages, 12 figures
Measurement of the gluon polarization ΔG/G at COMPASS
Creators: name: Schill, C.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: One of the key objectives of the COMPASS experiment at CERN is the determination of the gluon contribution to the nucleon spin. The gluon polarization is measured via photon-gluon fusion in deep-inelastic scattering of 160 GeV/c polarized muons on a polarized 6LiD solid-state target. Photon-gluon fusion is tagged by the observation of charmed mesons or the production of hadron pairs with large transverse momenta p_t. The status of the analysis of the D0 and D0* events and of the high-p_t hadron pairs is shown. The gluon polarization ΔG/G has been determined from the asymmetry of high-p_t hadron pairs with Q^2>1 GeV/c^2 in an analysis of the 2002/03 data as ΔG/G=0.06 \pm 0.31 (stat.) \pm 0.06 (syst.).
description: Proceeding of SPIN2004, Trieste
Baum, Wilhelm und Winkler, Dietmar W.: Die Apostolische Kirche des Ostens
Creators: name: Kaufhold, Hubert
Publisher: name: Oriens christianus : Hefte für die Kunde des christlichen Orients
Year: 2024

description: Oriens christianus : Hefte für die Kunde des christlichen Orients, Bd. 86 (2002): Oriens christianus, Band 86
ﺑﺮرﺳﯽ ﻋﻮاﻣﻞ ﻣﺆﺛﺮ ﺑﺮ ﮔﺮاﯾﺶ زﻧﺎن ﺑﻪ اﺷﺘﻐﺎل در ﺧﺎرج از ﻣﻨﺰل (ﮐﺎرﻣﻨﺪان زن ﺳﺎزﻣﺎن ﺑﯿﻤﻪ ﺧﺪﻣﺎت درﻣﺎﻧﯽ)
Creators: name: Tavassoli, Afsaneh
name: Khani, Fatemeh Rafiei
Publisher: name: figshare
Year: 2020
Subjects: subject: Sociology
subject: FOS: Sociology

description: زنان در ایجاد و پیشرفت تمدن بشري سهم ارزنده اي داشته و دارند، اما جایگاه شان در زندگی اجتماعی،متناسب با این سهم نبوده و نیست.از جمله وظایفی که نظام آفرینش در پرورش فرزندان، برعهده زنان قرار داده است، با وجود چنین ارزش بسیار والاي معنوي و مادي، گاه به عنوان مانعی در راه کار و شغل جلوه گر می شود و در دیگر موارد هم تکالیفی چندجانبه را بر دوش آنان می نهد.
Additional file 1 of Molecularly targeted nanoparticles: an emerging tool for evaluation of expression of the receptor for advanced glycation end products in a murine model of peripheral artery disease
Creators: name: Woźniak, Marcin
name: Konopka, Christian J.
name: Płoska, Agata
name: Hedhli, Jamila
name: Siekierzycka, Anna
name: Banach, Maciej
name: Bartoszewski, Rafal
name: Dobrucki, Lawrence W.
name: Kalinowski, Leszek
name: Dobrucki, Iwona T.
Publisher: name: figshare
Year: 2021
Subjects: subject: Biochemistry
subject: Space Science
subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Physiology
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: Marine Biology

description: Additional file 1. Additional figures.
An analytic theory of shallow networks dynamics for hinge loss classification
Creators: name: Pellegrini, Franco
name: Biroli, Giulio
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (stat.ML)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Neural networks have been shown to perform incredibly well in classification tasks over structured high-dimensional datasets. However, the learning dynamics of such networks is still poorly understood. In this paper we study in detail the training dynamics of a simple type of neural network: a single hidden layer trained to perform a classification task. We show that in a suitable mean-field limit this case maps to a single-node learning problem with a time-dependent dataset determined self-consistently from the average nodes population. We specialize our theory to the prototypical case of a linearly separable dataset and a linear hinge loss, for which the dynamics can be explicitly solved. This allow us to address in a simple setting several phenomena appearing in modern networks such as slowing down of training dynamics, crossover between rich and lazy learning, and overfitting. Finally, we asses the limitations of mean-field theory by studying the case of large but finite number of nodes and of training samples.
description: 16 pages, 6 figures
Decentralization in Argentina
Creators: name: Habibi, Nadir
name: Huang, Cindy
name: Miranda, Diego
name: Murillo, Victoria
name: Ranis, Gustav
name: Sarkar, Mainak
name: Stewart, Frances
name: Habibi, Nadir
name: Huang, Cindy
name: Miranda, Diego
name: Murillo, Victoria
name: Ranis, Gustav
name: Sarkar, Mainak
name: Stewart, Frances
Publisher: name: Unknown
Year: 2001
Subjects: subject: Political Economy
subject: fiscal decentralization
subject: human development
subject: Argentina

description: Human development, reflected in the status of people's levels of health and education, affects future growth and, in turn, is affected by decentralization. Unlike earlier exclusive emphasis on budgetary issues, this study focuses on the impact of fiscal decentralization on the level of human development. It traces the origin and recent development of revenue-sharing arrangements across Argentina's provinces over time (1970-94). The study regresses two indicators of health and educational status on two decentralization measures. It highlights the link between decentralization and human development outcomes and suggests that devolutionary decentralization has a positive influence on the effectiveness of public policy directed towards an improvement in the level of human development. Decentralization is shown to reduce intraregional disparities and increase levels of human development. While the paper also recognizes problems associated with decentralization, including addressing inter-regional disparities, the positive impact of decentralization schemes on human development is seen to be of relevance in evaluating the Argentine co-participation regime which is currently under negotiation.
Structural and Dynamical Mechanisms of a Naturally Occurring Variant of the Human Prion Protein in Preventing Prion Conversion
Creators: name: Tang, Yiming
name: Yao, Yifei
name: Wei, Guanghong
Publisher: name: arXiv
Year: 2020
Subjects: subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: Prion diseases are associated with the misfolding of the normal helical cellular form of prion protein (PrPC) into the beta-sheet-rich scrapie form (PrPSc) and the subsequent aggregation of PrPSc into amyloid fibrils. Recent studies demonstrated that a naturally occurring variant V127 of human PrPC is intrinsically resistant to prion conversion and aggregation, and can completely prevent prion diseases. However, the underlying molecular mechanism remains elusive. Herein we perform multiple microsecond molecular dynamics simulations on both wildtype (WT) and V127 variant of human PrPC to understand at atomic level the protective effect of V127 variant. Our simulations show that G127V mutation not only increases the rigidity of the S2-H2 loop between strand-2 (S2) and helix-2 (H2), but also allosterically enhances the stability of the H2 C-terminal region. Interestingly, previous studies reported that animals with rigid S2-H2 loop usually do not develop prion diseases, and the increase in H2 C-terminal stability can prevent misfolding and oligomerization of prion protein. The allosteric paths from G/V127 to H2 C-terminal region are identified using dynamical network analyses. Moreover, community network analyses illustrate that G127V mutation enhances the global correlations and intra-molecular interactions of PrP, thus stabilizing the overall PrPC structure and inhibiting its conversion into PrPSc. This study provides mechanistic understanding of human V127 variant in preventing prion conversion which may be helpful for the rational design of potent anti-prion compounds.
بررسي عوامل اجتماعي موثر در تسريع اقدام به عمل جراحي تغيير جنسيت در افراد مبتلا به اختلال هويت جنسي
Creators: name: Tavassoli, Afsaneh
name: Hasanian, Akram
name: Saberi, Seyed Mahdi
Publisher: name: figshare
Year: 2020
Subjects: subject: Sociology
subject: FOS: Sociology

description: توجه به اينكه، در اغلب فرهنگ ها فرآيند تغيير جنسيت به عنوان موضوعي در حوزه مطالعات جنسيت كمتر مورد توجه قرار گرفته است، پژوهش حاضر با هدف بررسي عوامل اجتماعي موثر در تسريع اقدام به عمل جراحي تغيير جنسيت در بين جوانان داراي اختلال هويت جنسي در استان تهران انجام گرديد.
The pure non-collisional Blue Straggler population in the giant stellar system omega Centauri
Creators: name: Ferraro, F. R.
name: Sollima, A.
name: Rood, R. T.
name: Origlia, L.
name: Pancino, E.
name: Bellazzini, M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have used high spatial resolution data from the Hubble Space Telescope and wide-field ground-based observations to search for blue straggler stars (BSS) over the entire radial extent of the large stellar system omega Centauri. We have detected the largest population of BSS ever observed in any stellar system. Even though the sample is restricted to the brightest portion of the BSS sequence, more than 300 candidates have been identified. BSS are thought to be produced by the evolution of binary systems (either formed by stellar collisions or mass exchange in binary stars). Since systems like Galactic globular clusters (GGC) and omega Cen evolve dynamically on time-scales significantly shorter than their ages, binaries should have settled toward the center, showing a more concentrated radial distribution than the ordinary, less massive single stars. Indeed, in all GGCs which have been surveyed for BSS, the BSS distribution is peaked at the center. Conversely, in omega Cen we find that the BSS share the same radial distribution as the adopted reference populations. This is the cleanest evidence ever found that such a stellar system is not fully relaxed even in the central region. We further argue that the absence of central concentration in the BSS distribution rules out a collisional origin. Thus, the omega Cen BSS are the purest and largest population of non-collisional BSS ever observed. Our results allow the first empirical quantitative estimate of the production rate of BSS via this channel. BSS in omega Cen may represent the best local template for modeling the BSS populations in distant galaxies where they cannot be individually observed.
description: 21 pages, 6 figures, accepted for publication by ApJ
Privatizing Highways in Latin America: Is It Possible to Fix What Went Wrong?
Creators: name: Engel, Eduardo M.R.A.
name: Fischer, Ronald
name: Galetovic, Alexander
name: Engel, Eduardo M.R.A.
name: Fischer, Ronald
name: Galetovic, Alexander
Publisher: name: Unknown
Year: 2003
Subjects: subject: Public Economics
subject: build-operate-and-transfer (BOT)
subject: concessions
subject: cost-of-funds
subject: flexibility
subject: franchising
subject: government subsidies
subject: present-value-of-revenue (PVR)
subject: regulation
subject: renegotiation

description: This paper reviews the Latin American experience with highway privatization during the last decade. Based on evidence from Argentina, Colombia and Chile, we find that private financing of new highways freed up fewer public resources than expected because public funds were often diverted to bail out franchise holders. Furthermore, many of the standard benefits of privatization did not materialize because of pervasive contract renegotiations. We argue that the disappointing performance of highway privatization in Latin America was due to two fundamental design flaws. First, countries followed a "privatize now, regulate later" approach. Second, most concessions were awarded as a fixed-term franchise, thereby creating a demand for guarantees and contract renegotiations. This paper also extends our previous work on formal models of highway privatization. We relax the self-financing constraint which ruled out the public provision of highways by assumption, and show that whenever the privatization of a highway is optimal, government transfers are undesirable. Alternatively, if government transfers are optimal, it is always the case that the full public provision of the highway should be preferred over privatization. We also model the role of flexibility and opportunistic behavior in highway concession contracts, and show that, by contrast with its fixed term counterpart, a flexible term franchise provides flexibility without inducing opportunistic behavior.
SIMPLE AND MULTIPLE CROSS-HEDGING OF RICE BRAN
Creators: name: Elam, Emmett W.
name: Miller, Stephen E.
name: Holder, Shelby H.
name: Elam, Emmett W.
name: Miller, Stephen E.
name: Holder, Shelby H.
Publisher: name: Unknown
Year: 1986
Subjects: Demand and Price Analysis

description: Feasibility of forward pricing sales of rice bran via cross-hedging was investigated. Corn, oats, wheat, and soybean meal futures were considered as simple and multiple cross-hedging media. Simulation results indicated that simple cross-hedging using corn futures would be most effective in reducing price risks.
Shallow-circuit variational quantum eigensolver based on symmetry-inspired Hilbert space partitioning for quantum chemical calculations
Creators: name: Zhang, Feng
name: Gomes, Niladri
name: Berthusen, Noah F.
name: Orth, Peter P.
name: Wang, Cai-Zhuang
name: Ho, Kai-Ming
name: Yao, Yong-Xin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Development of resource-friendly quantum algorithms remains highly desirable for noisy intermediate-scale quantum computing. Based on the variational quantum eigensolver (VQE) with unitary coupled cluster ansatz, we demonstrate that partitioning of the Hilbert space made possible by the point group symmetry of the molecular systems greatly reduces the number of variational operators by confining the variational search within a subspace. In addition, we found that instead of including all subterms for each excitation operator, a single-term representation suffices to reach required accuracy for various molecules tested, resulting in an additional shortening of the quantum circuit. With these strategies, VQE calculations on a noiseless quantum simulator achieve energies within a few meVs of those obtained with the full UCCSD ansatz for $\mathrm{H}_4$ square, $\mathrm{H}_4$ chain and $\mathrm{H}_6$ hexagon molecules; while the number of controlled-NOT (CNOT) gates, a measure of the quantum-circuit depth, is reduced by a factor of as large as 35. Furthermore, we introduced an efficient "score" parameter to rank the excitation operators, so that the operators causing larger energy reduction can be applied first. Using $\mathrm{H}_4$ square and $\mathrm{H}_4$ chain as examples, We demonstrated on noisy quantum simulators that the first few variational operators can bring the energy within the chemical accuracy, while additional operators do not improve the energy since the accumulative noise outweighs the gain from the expansion of the variational ansatz.
The physical properties and impact of AGN outflows from high to low redshift
Creators: name: Venturi, Giacomo
name: Marconi, Alessandro
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Feedback from active galactic nuclei (AGN) on their host galaxies, in the form of gas outflows capable of quenching star formation, is considered a major player in galaxy evolution. However, clear observational evidence of such major impact is still missing; uncertainties in measuring outflow properties might be partly responsible because of their critical role in comparisons with models and in constraining the impact of outflows on galaxies. Here we briefly review the challenges in measuring outflow physical properties and present an overview of outflow studies from high to low redshift. Finally, we present highlights from our MAGNUM survey of nearby AGN with VLT/MUSE, where the high intrinsic spatial resolution (down to $\sim$10 pc) allows us to accurately measure the physical and kinematic properties of ionised gas outflows.
description: 8 pages, 2 figures, to be published in Proceeding IAU Symposium No. 359, 2020, "Galaxy evolution and feedback across different environments", Eds. T. Storchi-Bergmann, R. Overzier, W. Forman and R. Riffel
EVALUATING PRIVATELY FUNDED PUBLIC RESEARCH: AN EXAMPLE WITH POULTRY AND EGGS
Creators: name: Martinez, Stephen W.
name: Norton, George W.
name: Martinez, Stephen W.
name: Norton, George W.
Publisher: name: Unknown
Year: 1986
Subjects: Public Economics

description: A procedure is described for evaluating poultry and egg research projects. A peer review questionnaire and benefit-cost analysis are utilized incorporating elasticities from an econometric model for poultry and eggs. Production, cost, and price changes are used to calculate changes in producer surplus and net economic surplus for a set of privately funded publicly conducted research projects.
Angular and polarization observables for Majorana-mediated B decays with effective interactions
Creators: name: Duarte, Lucía
name: Zapata, Gabriel
name: Sampayo, O. A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We probe the effective field theory extending the Standard Model with a sterile neutrino in B meson decays at B factories and lepton colliders, using angular and polarization observables. We put bounds on different effective operators characterized by their distinct Dirac-Lorentz structure, and probe the $N$-mediated B decays sensitivity to these interactions. We define a Forward-Backward asymmetry $A_{FB}^{\ell γ}$ between the muon and photon directions for the $B \to μνγ$ decay, which allows us to separate the SM contribution from the effective lepton number conserving and violating processes, mediated by a near on-shell $N$. Using the most stringent constraints on the effective parameter space from Belle and BaBar we find that a measurement of the final polarization $P_τ$ in the rare $B^-\rightarrow \ell^-_{1}\ell^-_{2} π^+$ decays can help us infer the scalar or vector interaction content in the $N$ production or decay vertices. We find that the B meson decays are more sensitive to scalar operators.
description: 7 figures, 3 tables
Charge and CP symmetry breaking in two Higgs doublet models
Creators: name: Barroso, A.
name: Ferreira, P. M.
name: Santos, R.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We show that, for the most generic model with two Higgs doublets possessing a minimum that preserves the $U(1)_{em}$ symmetry, charge breaking (CB) cannot occur. If CB does not occur, the potential could have two different minima, and there is in principle no general argument to show which one is the deepest. The depth of the potential at a stationary point that breaks CB or CP, relative to the $U(1)_{em}$ preserving minimum, is proportional to the squared mass of the charged or pseudoscalar Higgs, respectively.
FORMULATION OF BROILER FINISHING RATIONS BY QUADRATIC PROGRAMMING
Creators: name: Miller, Bill R.
name: Arraes, Ronaldo De Albuquerque E
name: Pesti, Gene M.
name: Miller, Bill R.
name: Arraes, Ronaldo De Albuquerque E
name: Pesti, Gene M.
Publisher: name: Unknown
Year: 1989
Subjects: Livestock Production/Industries

description: Least cost feed mix by linear programming (LP) is a standard economic analysis in the poultry industry. A significant body of nutrition knowledge is now contained in the constraint set of industry LP models. This knowledge might be merged into an improved economic model that contains production response information. Analysis using a quadratic programming model indicated that a leading broiler firm could have improved economic efficiency by increasing protein density and reducing energy density of broiler finisher feed. If applicable industry wide, similar savings could be as high as $120 million per year.
Baryon masses at O(a^2) in chiral perturbation theory
Creators: name: Tiburzi, Brian C.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The chiral Lagrangian for the Symanzik action through O(a^2) for baryons is obtained. We consider two flavor unquenched and partially quenched lattice theories, allowing for mixed actions in the latter. As an application, we calculate masses to O(a^2) for the nucleons and deltas, and investigate the corrections due to the violation of O(4) rotational invariance. These results are contrasted with those in the meson sector for lattice simulations using mixed and unmixed actions of Wilson and Ginsparg-Wilson quarks.
description: 27 pages, 2 figures, revised
بررسی عوامل اجتماعی مؤثر بر اختلاف ها و تعارضات اقتصادی زندگی زناشویی زنان شاغل و خانه
Creators: name: Tavassoli, Afsaneh
name: Taheri, Narges
Publisher: name: figshare
Year: 2020
Subjects: subject: Sociology
subject: FOS: Sociology

description: روش تحقیق در این پژوهش پیمایشی است. جامعۀ آماری، زنان شاغل و خانه دارِ شهر تهران و حجم نمونه 211 نفر است. نمونه گیری به صورت خوشه ای و تصادفی ساده در سه منطقۀ شمال و جنوب و مرکز شهر تهران انجام شده است. ابزار مورد استفاده پرسشنامۀ محققساخته است که با نرمافزار spss تجزیه و تحلیل شده است. یافته های تبیینی حاکی از آن است که بین تقسیم کار در خانواده و اختلافات اقتصادی زندگی زناشویی در دو گروه زنان شاغل و خانه دار رابطۀ معناداری وجود دارد. بین نگرش نسبت به اشتغال زن و عرف مذهبی و هزینه ها با اختلافات اقتصادی زندگی زناشویی زنان شاغل رابطه وجود دارد. با افزایش میزان حمایت خانوادگی و افزایش درآمد هر دو گروه از زنان شاغل و خانه دار، میزان اختلافات اقتصادی زندگی زناشویی کاهش می یابد. در میان زنان غیر شاغل، بین مدت زمان ازدواج و تعداد فرزندان و اختلافات اقتصادی زندگی زناشویی رابطۀ معناداری وجود دارد. در مجموع، یافته ها نشان میدهد که اختلافات اقتصادی زندگی زناشویی زنان شاغل بیش از زنان خانه دار است.
Nonlinear transport in $β-$Na$_{0.33}$V$_2$O$_5$
Creators: name: Sirbu, S.
name: van Loosdrecht, P. H. M.
name: Yamauchi, T.
name: Ueda, Y.
name: .
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Transport properties of the charge ordering compound $β-$Na$_{0.33}$V$_2$O$_5$ are studied in the temperature range from 30 K to 300 K using current driven DC conductivity experiments. It is found that below the metal-insulator transition temperature (T$_{mi}$ = 136 K) this material shows a typical nonlinear charge density wave behavior. The observed conductivity is discussed in terms of a classical domain model for charge density wave transport.
description: 8 pages, 9 figures, final version
First-principles study of the atomic and electronic structure of the Si(111)-(5x2-Au surface reconstruction
Creators: name: Riikonen, Sampsa
name: Sanchez-Portal, Daniel
Publisher: name: arXiv
Year: 2005
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present a systematic study of the atomic and electronic structure of the Si(111)-(5x2)-Au reconstruction using first-principles electronic structure calculations based on the density functional theory. We analyze the structural models proposed by Marks and Plass [Phys. Rev. Lett.75, 2172 (1995)], those proposed recently by Erwin [Phys. Rev. Lett.91, 206101 (2003)], and a completely new structure that was found during our structural optimizations. We study in detail the energetics and the structural and electronic properties of the different models. For the two most stable models, we also calculate the change in the surface energy as a function of the content of silicon adatoms for a realistic range of concentrations. Our new model is the energetically most favorable in the range of low adatom concentrations, while Erwin's "5x2" model becomes favorable for larger adatom concentrations. The crossing between the surface energies of both structures is found close to 1/2 adatoms per 5x2 unit cell, i.e. near the maximum adatom coverage observed in the experiments. Both models, the new structure and Erwin's "5x2" model, seem to provide a good description of many of the available experimental data, particularly of the angle-resolved photoemission measurements.
Design rules of thumb for naturally ventilated office buildings in Canada
Creators: name: Edwards, Craig
Publisher: name: University of British Columbia
Year: 2009

description: Using natural ventilation to provide ventilation and/or cooling in commercial buildings has a number of direct benefits to the environment, building occupants, building owners, and architects. Despite advances now occurring in design methods, major obstacles still need to be overcome before a wide spread adoption of natural ventilation technologies will be seen. Most importantly, simple tools that can be used by architects in the initial stages of design of naturally ventilated buildings are required. Existing natural ventilation design rules of thumb were identified from published literature and building codes and standards. A computer model, capable of simulating both naturally induced airflow rates and building thermal performance, was used to evaluate natural ventilation performance in terms of ability to avoid overheating and provide ventilation for indoor air quality. First the effect of changes to building design parameters on the natural ventilation performance of a base case office building were investigated. Secondly, the validity and limitations of existing rules of thumb were evaluated. The base case building was a three story cross ventilated office building surrounded by large local wind and solar obstructions, simulated with climate data for the cities of Vancouver and Toronto. It was found that the development of most of the existing rules of thumb has been based on incomplete research, and the conditions under which they can be applied are poorly defined. When the limitations of these rules of thumb were investigated, it was found that the original rules of thumb are generally not accurate for either the climates of Vancouver or Toronto. More accurate ranges of applicability were developed for each rule of thumb for each of the two climates. The relative influence of design parameters on reducing overheating and increasing ventilation rates for indoor air quality were also established, and can be used to provide guidance into how changes made to the building form and fabric can effect overheating and indoor air quality.
Additional file 2 of Damage control strategy in perforated diverticulitis with generalized peritonitis
Creators: name: Sohn, Maximilian
name: Agha, Ayman
name: Iesalnieks, Igors
name: Gundling, Felix
name: Presl, Jaroslav
name: Hochrein, Alfred
name: Tartaglia, Dario
name: Brillantino, Antonio
name: Perathoner, Alexander
name: Pratschke, Johann
name: Aigner, Felix
name: Ritschl, Paul
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Cell Biology
subject: Physiology
subject: FOS: Biological sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Cancer

description: Additional file 2: AMSTAR2 checklist.
Analysis of new charmless strange B decay data leaves high $B\to Kη'$ and $B\to Kη' X$ still unexplained
Creators: name: Lipkin, Harry J.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The question of whether the anomalously large $B \to Kη' $ and $B \to Kη' X $ (inclusive) branching ratios are consistent with the standard model or a sign of new physics is still open and in the experimental court. The nature of the extra hadron $X$ in $B \to Kη' X $ is completely unknown. Directions for investigation and analysis of inclusive data are suggested as well as for comparable inclusive data on $B \to KηX $. New data confirming the prediction $BR(K^\pm ρ^o) = BR(K^\pm ω)$ support flavor-topology $B \to VP$ sum rules based on the OZI rule and emphasize the sharp contrast with the failure of the analogous $B \to PP $ sum rule due to the anomalously large $BR(B \to Kη')$. Confirmation of OZI validity in B-decay analyses for VP final states suggests improving data on the analogous neutral decay difference $BR(B^o \to K^o ρ^o) - BR(B^o \to K^o ω)$ which measures tree-penguin interference and possible direct CP violation. A successful approximate isospin sum rule is rearranged and reinterpreted to pinpoint tree-penguin interference in $B \to K π$ and $B \to K ρ$ transitions. The magnitude of the interference is shown to still be at the statistical noise level with present data.
description: 11 pages, 6 figures
A Computational Multi-Criteria Optimization Approach to Controller Design for Physical Human-Robot Interaction
Creators: name: Aydin, Yusuf
name: Tokatli, Ozan
name: Patoglu, Volkan
name: Basdogan, Cagatay
Publisher: name: arXiv
Year: 2020
Subjects: subject: Robotics (cs.RO)
subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: Physical human-robot interaction (pHRI) integrates the benefits of human operator and a collaborative robot in tasks involving physical interaction, with the aim of increasing the task performance. However, the design of interaction controllers that achieve safe and transparent operations is challenging, mainly due to the contradicting nature of these objectives. Knowing that attaining perfect transparency is practically unachievable, controllers that allow better compromise between these objectives are desirable. In this paper, we propose a multi-criteria optimization framework, which jointly optimizes the stability robustness and transparency of a closed-loop pHRI system for a given interaction controller. In particular, we propose a Pareto optimization framework that allows the designer to make informed decisions by thoroughly studying the trade-off between stability robustness and transparency. The proposed framework involves a search over the discretized controller parameter space to compute the Pareto front curve and a selection of controller parameters that yield maximum attainable transparency and stability robustness by studying this trade-off curve. The proposed framework not only leads to the design of an optimal controller, but also enables a fair comparison among different interaction controllers. In order to demonstrate the practical use of the proposed approach, integer and fractional order admittance controllers are studied as a case study and compared both analytically and experimentally. The experimental results validate the proposed design framework and show that the achievable transparency under fractional order admittance controller is higher than that of integer order one, when both controllers are designed to ensure the same level of stability robustness.
description: 13 pages, 13 figures. Accepted to IEEE Transaction on Robotics
1695: William Henry and Edward John Spiller
Creators: name: Project Team, Lest We Forget
Publisher: name: University of Oxford
Year: 2024
Subjects: classificationCode: 430304
subject: British history
classificationCode: 430308
subject: European history (excl. British, classical Greek and Roman)
classificationCode: 430316
subject: International history

description: The items include records of the contributor's great uncle, W. H. Spiller, who died in 1916.
Managing Culture and Generation Differences in Projects with Aggressive Schedules: a Gulf Region Perspective
Creators: name: Abutahoun, Tamer
Publisher: name: figshare
Year: 2020
Subjects: subject: 130203 Economics, Business and Management Curriculum and Pedagogy
subject: FOS: Educational sciences

description: This is the research project of a master's degree in project management from the University of Roehampton, UK. The research is about how to manage culture and generation differences in projects with aggressive schedules: a Gulf Region perspectives.
Calculation of isotope shifts for cesium and francium
Creators: name: Dzuba, V. A.
name: Johnson, W. R.
name: Safronova, M. S.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We perform ab initio calculations of isotope shifts for isotopes of cesium (from A=123 to A=137) and francium (from A=207 to A=228). These calculations start from the relativistic Hartree-Fock method and make use of several techniques to include correlations. The field (volume) isotope shift is calculated by means of an all-order correlation potential method and within the singles-doubles partial triples linearized coupled-cluster approach. Many-body perturbation theory in two different formulations is used to calculate the specific mass shift. We discuss the strong points and shortcomings of the different approaches and implications for parity nonconservation in atoms. Changes in nuclear charge radii are found by comparing the present calculations with experiment.
description: 8 pages, 10 tables, no figures, submitted to Phys. Rev. A