cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
RR Lyrae stars in the inner Large Magellanic Cloud: Halo-like location with a disk-like distribution
Creators: name: Subramaniam, Annapurni
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The distribution of RR Lyrae stars (RRLS) in the inner Large Magellanic Cloud (LMC), and the structure of the halo of the LMC delineated by these stars are studied here. RRLS identified by the OGLE II survey are used to estimate their number density distribution in the bar region of the LMC. To find their location, I estimated the scale-height of their distribution in the LMC using extinction corrected average magnitudes of ab type stars. The density is found to vary differently along and across the bar of the LMC, and the difference is found to be statistically significant. The density distribution is found to be elongated like the LMC bar and the position angle (PA) of the elongation is estimated to be 112.$^o$5 $\pm$ 15.$^o$3. This value of PA is found to be same as the PA$_{maj}$ of the bar, within the errors, estimated using red clump stars and giants. The ellipticity of their density distribution is estimated to be $\sim$ 0.5, very similar to the ellipticity of the bar, estimated from giants. The above results show that majority of the population of RRLS in the central region of the LMC are found to have the signature of the bar. This result could mean that most of these stars are located in the disk, considering the bar as a disk feature. On the other hand, their scale-height was found to be 3.0$\pm 0.9$ kpc. This indicates that RRLS are located in the halo and not in the disk. Thus these stars in the inner LMC have halo-like location and a disk-like density distribution. I discuss some possible formation scenarios for this puzzling combination.
description: 8 pages to appear in A & A
GRBs-SN and SGR-X-Pulsar as blazing Jets
Creators: name: Fargion, D.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Old and recent puzzles of GRBs and SGRs find a solution with a model based on the fast blazing of very collimated thin gamma Jets. Damped oscillating afterglows in GRB030329 find a natural explanation assuming a very thin Jet whose persistent activity and different angle of view maybe combined at once with the Supernovae power and the apparent huge GRBs output. The same thin beaming offer an understanding of the apparent SGR-Pulsar power connection. A thin collimated precessing Gamma Jet model for both GRBs and SGRs, at their different scaled luminosity (10^{44} - 10^{38}erg s^-1), explains the existence of few identical energy spectra and time evolution of these sources leading to a unified model. Their similarity with the huge precessing Jets in AGN, QSRs and Radio-Galaxies inspires this smaller scale SGR-GRB model. The spinning-precessing Jet explains the rare mysterious X-Ray precursors in GRBs and SGRs events. Any large Gamma Jet off-axis beaming to the observer might lead to the X-Flash events without any GRB signals, as the most recent XRF030723. Its possible re-brightening would confirm the evidence of the variable pointing of the jet in or off line towards the observer. Indeed a multi-precessing Jet at peak activity in all bands may explain the puzzling X or optical re-brightening bumps found in the GRB 021004, GRB030329 and the SGR 1900+ 14 on 27 August 1998 and once again on the 18 April 2001. Rarest micro-quasars neutron star in our galaxy as SS433, and Herbig Haro objects and Cir-X-1 describe these thin precessing Jet imprints in the spectacular shapes of their relic nebulae.
description: 10 pages, 10 figures, Vulcano Conference May 2003
Akdeniz Orman Ağaçlarında Taç Durumu Değerlendirmeleri için Fotograf Kılavuzu
Creators: name: Karakurt, Hidayet
Publisher: name: figshare
Year: 2020
Subjects: subject: 70504 Forestry Management and Environment
subject: FOS: Agriculture, forestry and fisheries
subject: 70599 Forestry Sciences not elsewhere classified

description: Avrupa Komisyonu Birleşmiş Milletler Avrupa Ekonomik Komisyonu Akdeniz Uzmanları Çalışma Grubu Brüksel, 1994.Bu fotograf kılavuzunda 5 farklı taç şeffaflığı safhasındaki 23 tür (12 geniş yapraklı ve 11 kozalaklı) gösterilerek açıklanmıştır. Her bir tür için açıklayıcı çizimleri içeren kısa bir tanımlama da eklenmiştir. Bu el kitabı Akdeniz Orman Türlerindeki Zararın Gözlenmesi (Observation of Damages to Mediterranean 3 Forest Species) adlı yayının bir devamıdır. Ancak bu el kitabının içeriği, yapısı ve uygulamaya dönük amaçları farklıdır. İlk yayından farklı olarak, bu fotograf kılavuzu farklı sebep amilleri arasındaki değişikliği dikkate almaksızın, taç durumu değerlendirmeleriyle ilgili sadece pratik sorunlardan bahsetmektedir. Ağaçlardaki taç şeffaflığının farklı sınıflarını fotograflarla göstermenin yanında, bu kılavuz sorun olan türlerdeki taç (:tepe) sıklığındaki azalmanın önemli desenleri hakkında da kısa açıklamalar da sağlamaktadır.Bu kılavuz Akdeniz kuşağında bulunan Türkiye'deki orman sağlığını izleme (ICP Forests) programında çalışanlara yardımcı olmak üzere Dr. Hidayet Karakurt tarafından Türkçeye çevrilmiştir.
New Results On Censored Regression with Applications to Transactions Costs, Household Decisions and Food Purchases
Creators: name: Holloway, Garth J.
name: Mazzocchi, Mario
name: Perali, Carlo Federico
name: Holloway, Garth J.
name: Mazzocchi, Mario
name: Perali, Carlo Federico
Publisher: name: Unknown
Year: 2006
Subjects: subject: Food Consumption/Nutrition/Food Safety
subject: conditionally censored Tobit regression
subject: Bayes inference

description: We generalize the Tobit censored regression to permit unique unobserved censoring thresholds conditioned by covariates and a set of common response coefficients. This situation , we argue, is one arising frequently in applications of censored regression and we provide three diverse examples to motivate the theory. We derive a robust estimation algorithm with three noteworthy features. First, by augmenting the observed-data likelihood with the censored observations, the estimation strategy is the same as Chib (1992) who derives Bayes estimates of the conventional censored regression. Second, by virtue of its generality, the model is applicable to a much broader set of circumstances than the conventional Tobit regression, which is nested as a special case of the more general framework. Third, despite its generality and wide applicability, the estimation algorithm is very simple, evidencing routine application of Markov chain Monte Carlo methods (MCMC)-Gibbs sampling in particular- and requiring only modest extensions of the basic algorithm in Chib (1992). The model and procedures are illustrated empirically in three applications that we use to motivate the theory, namely problems in transactions-costs economics, household decision-making and food-consumption.
Land Distributional and Income Effects of the Chinese Land Rental Market
Creators: name: Wu, Ziping
name: Wu, Ziping
Publisher: name: Unknown
Year: 2006
Subjects: subject: Land Economics/Use
subject: Land rental market
subject: distribution
subject: efficiency
subject: land abandonment

description: Using panel data of 450 farm households for the period of 1996-2001 in Zhejiang, China, we measured land distributional effect and income effect of the land rental market. It is found that the rental market had contributed for a less equal land distribution among the households, and for the concentration of land to households with higher efficiency. With a land rental market in a dynamic economic development process, improvements in overall production efficiency of the households, however, mainly come from the reduction of land abandonment and the contribution from land changing hands is very limited.
Electronic Properties of α'-NaV_2O_5
Creators: name: Gozar, A.
name: Blumberg, G.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We studied electronic excitations in NaV2O5 by Raman. Three main topics are discussed. The first is related to a broad continuum of excitations found in the 200-1500 cm-1 range and peaked around 680 cm-1. The resonant Raman profile of this excitation, the polarization selection rules and the presence of its overtone in resonance conditions allowed us to conclude that the origin of this feature is magnetic. We proposed that it arises as a result of light coupling to multi-spinon Raman excitations. Within this scenario we also argued for a scenario explaining the puzzling temperature dependence of the magnetic continuum in terms of an increasing role of next nearest neighbor frustration and in the context of a strongly fluctuating low temperature phase. The second topic is related to the observation of a folded S = 1 magnetic mode which displayed very clear selection rules as a function of the magnetic field orientation. We proposed that the coupling of the photon field to this excitation takes place via the antisymmetric, Dzyaloshinskii-Moriya (DM), interaction which, in a simple dimer model, can also explain the observed selection rules: no splitting or shifts for magnetic fields parallel to the DM vector and the observation of two (upward and downward) dispersing branches for fields perpendicular to the DM vector. Thirdly, we discuss the nature of several new resonances seen below T_c and focus on the possibilities that they are either folded phonons or singlet bound states of two triplet excitations. In particular we emphasized the existence of two modes at 66 and 105 cm-1, the first one being degenerate with one of the spin gap modes.
description: 29 pages, 19 figures
An Interactive Decision Model Integrating Broiler Production and Processing Responsiveness to Consumer and Producer Prices
Creators: name: Costa, Ecio De Farias
name: Houston, Jack E.
name: Costa, Ecio De Farias
name: Houston, Jack E.
Publisher: name: Unknown
Year: 2006
Subjects: Livestock Production/Industries

description: In the vertically integrated poultry industry, profit maximization for broiler integrators must incorporate feed formulation, broiler production, and broiler processing operations to determine optimally sized birds for the most profitable market segments. Here, substituting cottonseed meal (CSM) for soybean meal (SBM) in broiler feed is evaluated under changing input and product market conditions, where there are two processing options - whole carcass vs. cut-up parts. For the prices analyzed, CSM-fed broilers earn higher profits for whole carcass processing, while SBM-fed broilers earn higher returns for cut-up parts processing. Optimal protein levels used in the feed processes exceed currently recommended levels.
Microplastics and anthropogenic fibre concentrations in lakes reflect surrounding land use.
Creators: name: Tanentzap, Andrew
name: Cottingham, Samuel
name: Fonvielle, Jérémy
name: Riley, Isobel
name: Walker, Lucy M
name: Woodman, Samuel
name: Kontou, Danai
name: Pichler, Christian
name: Reisner, Erwin
name: Lebreton, Laurent
Publisher: name: Apollo - University of Cambridge Repository
Year: 2021

description: Pollution from microplastics and anthropogenic fibres threatens lakes, but we know little about what factors predict its accumulation. Lakes may be especially contaminated because of long water retention times and proximity to pollution sources. Here we surveyed anthropogenic microparticles, that is microplastics and anthropogenic fibres, in surface waters of 67 European lakes spanning 30° of latitude and large environmental gradients. By collating data from >2100 published net tows, we found that microparticle concentrations in our field survey were higher than previously reported in lakes and comparable to rivers and oceans. We then related microparticle concentrations in our field survey to surrounding land use, water chemistry, and plastic emissions to sites estimated from local hydrology, population density, and waste production. Microparticle concentrations in European lakes quadrupled as both estimated mismanaged waste inputs and wastewater treatment loads increased in catchments. Concentrations decreased by two- and five-times over the range of surrounding forest cover and potential in-lake biodegradation, respectively. As anthropogenic debris continues to pollute the environment, our data will help contextualise future work and our models can inform control and remediation efforts.
description: This work was funded by the H2020 ERC Starting Grant 804673 sEEIngDOM and an Isaac Newton Trust Research Grant 19.23(s) to AJT. CMP and ER were supported by the UKRI Cambridge Creative Circular Plastics Centre (grant EP/S025308/1).
Optimal verification of stabilizer states
Creators: name: Dangniam, Ninnat
name: Han, Yun-Guang
name: Zhu, Huangjun
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Statistical verification of a quantum state aims to certify whether a given unknown state is close to the target state with confidence. So far, sample-optimal verification protocols based on local measurements have been found only for disparate groups of states: bipartite pure states, GHZ states, and antisymmetric basis states. In this work, we investigate systematically optimal verification of entangled stabilizer states using Pauli measurements. First, we provide a lower bound on the sample complexity of any verification protocol based on separable measurements, which is independent of the number of qubits and the specific stabilizer state. Then we propose a simple algorithm for constructing optimal protocols based on Pauli measurements. Our calculations suggest that optimal protocols based on Pauli measurements can saturate the above bound for all entangled stabilizer states, and this claim is verified explicitly for states up to seven qubits. Similar results are derived when each party can choose only two measurement settings, say X and Z. Furthermore, by virtue of the chromatic number, we provide an upper bound for the minimum number of settings required to verify any graph state, which is expected to be tight. For experimentalists, optimal protocols and protocols with the minimum number of settings are explicitly provided for all equivalent classes of stabilizer states up to seven qubits. For theorists, general results on stabilizer states (including graph states in particular) and related structures derived here may be of independent interest beyond quantum state verification.
description: 38 pages, 2 long tables. Code available at https://github.com/Ninnat/graph-state-verification
Inclusive electroproduction of light hadrons with large p_T at next-to-leading order
Creators: name: Kniehl, Bernd A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We review recent results on the inclusive electroproduction of light hadrons at next-to-leading order in the parton model of quantum chromodynamics implemented with fragmentation functions and present updated predictions for HERA experiments based on the new AKK set.
description: 4 pages, 5 figures, to appear in the proceedings of the XIII International Workshop on Deep Inelastic Scattering (DIS 2005)
Groundwater Conservation Policy in Agriculture
Creators: name: Wilson, Paul N.
name: Needham, Robert A.
name: Wilson, Paul N.
name: Needham, Robert A.
Publisher: name: Unknown
Year: 2006
Subjects: subject: Resource /Energy Economics and Policy
subject: Impact assessment
subject: public policy
subject: irrigation
subject: water conservation

description: Transboundary water conflicts between urban and rural populations often center on water use in the agricultural sector. Public officials may select a water conservation policy as the primary tool for reducing agricultural water use with the goal to improve water availability to urban areas and future generations. The Groundwater Management Act of 1980 (GMA) in Arizona was designed, in part, to induce water conservation in irrigated agriculture to sustain economic growth in an arid climate. Our mixed-method evaluation design merges qualitative, interview-based information with an estimated water demand function using panel data. We find that the GMA began with a flawed design and evolved through political circumstances into a ineffective water conservation tool. We explain nearly all water use in Arizona's agricultural sector from 1984-2002 using prices and weather data. We found no statistical evidence that the management plans of the GMA directly contributed to reduced water demand in Arizona's agricultural sector over the study period.
Probing Noncommutative Gravity with Gravitational Wave and Binary Pulsar Observations
Creators: name: Jenks, Leah
name: Yagi, Kent
name: Alexander, Stephon
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Noncommutative gravity is a natural method of quantizing spacetime by promoting the spacetime coordinates themselves to operators which do not commute. This approach is motivated, for example, from a quantum gravity perspective, among others. Noncommutative gravity has been tested against the binary black hole merger event GW150914. Here, we extend and improve upon such a previous analysis by (i) relaxing an assumption made on the preferred direction due to noncommutativity, (ii) using posterior samples produced by the LIGO/Virgo Collaborations, (iii) consider other gravitational wave events, namely GW151226, GW170608, GW170814 and GW170817, and (iv) consider binary pulsar observations. Using Kepler's law that contains the noncommutative effect at second post-Newtonian order, we derive corrections to the gravitational waveform phase and the pericenter precession. Using the gravitational wave and double pulsar binary observations, we find bounds on a space-time noncommutative tensor $θ^{0i}$ in terms of the preferred frame direction with respect to the orientation of each binary. We find that the gravitational wave bounds are stronger than the binary pulsar one by an order of magnitude and the noncommutative tensor normalized by the Planck length and time is constrained to be of order unity.
description: 9 pages, 5 figures
The Effects of Trade Liberalization of the Environment: An Empirical Study
Creators: name: McCarney, Geoffrey R.
name: Adamowicz, Wiktor L.
name: McCarney, Geoffrey R.
name: Adamowicz, Wiktor L.
Publisher: name: Unknown
Year: 2006
Subjects: subject: Environmental Economics and Policy
subject: International Relations/Trade
subject: Trade
subject: Environment
subject: Growth
subject: Pollution
subject: Governance
subject: Policy

description: We seek to contribute to the emerging economic theory on trade, the environment and development. Using panel data across countries, econometric models are estimated to predict the effects of openness on organic water pollutant (BOD) and carbon dioxide (CO2) emissions. Results indicate that freer trade significantly increases emissions of both pollutants, thus reducing environmental quality. Moreover, the panel nature of the data allows heterogeneity across countries to be controlled, so that comparisons can be made of how different national characteristics influence the environmental impact of freer trade. By testing the effects of democratic versus autocratic governance, it is found that while greater democracy can induce significant reductions in BOD emissions as openness increases, it may also lead to increased CO2 levels. Meanwhile, by testing for and failing to reject the pollution haven hypothesis, it is suggested that environmental gains from openness in relatively rich countries may be coming at the expense of environmental degradation in poorer countries.
Tomographic approach to resolving the distribution of LISA Galactic binaries
Creators: name: Mohanty, Soumya D.
name: Nayak, Rajesh K.
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The space based gravitational wave detector LISA is expected to observe a large population of Galactic white dwarf binaries whose collective signal is likely to dominate instrumental noise at observational frequencies in the range 10^{-4} to 10^{-3} Hz. The motion of LISA modulates the signal of each binary in both frequency and amplitude, the exact modulation depending on the source direction and frequency. Starting with the observed response of one LISA interferometer and assuming only doppler modulation due to the orbital motion of LISA, we show how the distribution of the entire binary population in frequency and sky position can be reconstructed using a tomographic approach. The method is linear and the reconstruction of a delta function distribution, corresponding to an isolated binary, yields a point spread function (psf). An arbitrary distribution and its reconstruction are related via smoothing with this psf. Exploratory results are reported demonstrating the recovery of binary sources, in the presence of white Gaussian noise.
description: 13 Pages and 9 figures high resolution figures can be obtains from http://www.phys.utb.edu/~rajesh/lisa_tomography.pdf
Ab Initio Modeling of Phonon-Assisted Relaxation of Electrons and Excitons in Semiconductor Nanocrystals for Multiexciton Generation
Creators: name: Zeng, Taofang
name: He, Yi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Electron-phonon and exciton-phonon interactions in nanoclusters are formulated and computed under the framework of GW-BSE (Bethe-Salpeter equation) approach. The phonon effect is modeled with the two-particle representation for the first time. The nonradiative relaxation rates of electrons and excitons are calculated. It is uncovered that both single-phonon relaxation and multiple-phonon relaxation are significant in nanocrystals, and correspond to two types of physical processes that have totally different spectral lineshapes. Furthermore, the multiple-phonon relaxation always occurs and its rates are comparable to the corresponding single-phonon relaxation rates for both electrons and excitons in the system studied (Si46). The inelastic scattering rates of electrons and excitons are also calculated based on many-body Green function theory. For the electronic states in Si46, the inelastic scattering decay is predicted to be a primary decay mechanism for multiexciton relaxation, and nonradiative relaxation rates are larger than inelastic scattering rates for most excitonic states in Si46.
description: 43 pages, 14 figures
Determinants of Land Use in the Densely Populated Kigezi Highlands of Southwestern Uganda
Creators: name: Bamwerinde, W.
name: Bashaasha, Bernard
name: Ssembajjwe, W.
name: Place, Frank
name: Bamwerinde, W.
name: Bashaasha, Bernard
name: Ssembajjwe, W.
name: Place, Frank
Publisher: name: Unknown
Year: 2006
Subjects: subject: Land Economics/Use
subject: abandoned terraces
subject: Land use
subject: Kigezi Highlands
subject: multinominal logit

description: We use a multinominal logit model to examine the determinants of plot abandonment (unintentional fallows) and long fallows (intentional fallows) in order to propose policy interventions that lead to optimal and sustainable management of land use systems in Kigezi highlands. Household factors such as age, and post primary education positively influenced farmers' decision to abandon plots. Therefore, more fallows and abandoned terraces were common with older farmers compared to younger ones. However, farm size and household type had no significant influence on abandonment of plots. Plot variables such as slope and plot distance had the expected positive signs while soil fertility had a significant negative sign as predicted. Two types of interventions are recommended. Those aimed at highly cultivable, moderate slopes and those aimed at uncultivable and fragile areas. For the former, the probability of adoption and intensity of use of appropriate agrobased interventions is likely to be very high. The latter require specific interventions that are profitable and yet allowing farmers to keep the land under cover for a very long time. Furthermore, we recommend incentives aimed at minimizing distances to plot fields.
Collective Spin and Charge Excitations in (Sr,La)_{14-x}Ca_xCu_{24}O_{41} Quantum Spin Ladders
Creators: name: Gozar, A.
name: Blumberg, G.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study magnetic and electronic properties of two-leg ladder materials. We observed a two-magnon (2M) resonance which we analyze in terms of symmetry, relaxation and resonance properties. Our findings were contrasted to 2M Raman measurements in other magnetic crystals. This comparison made us suggest that the spin-spin correlations in a self-doped two leg ladder may have a modulated component besides the exponential decay characteristic of a spin liquid ground state. We found that the 2M intensity resonates at the Mott gap energy. Interplane Sr substitution for Ca introduces strong disorder leading to inhomogeneous broadening of the 2M resonance. The doped holes in the spin liquid ground state further dilute the magnetic correlations, suppressing the spectral weight of this excitation. At high Ca concentrations are superconducting under pressure and hole pairing was proposed to be a robust feature of doped ladders. The measured dielectric response in the microwave region, the low energy Raman data, the non-linear transport properties along with soft x-ray scattering allowed us to conclude that the ground state for a wide range of Ca concentrations (x < 12) is characterized by charge density wave correlations. This state seems to be driven not by phonons but by Coulomb forces and many-body effects. We highlighted the similarity in the finite frequency Raman response as opposed to the very different behavior of the DC resistivity between undoped and doped ladders. We found that at high Ca concentrations the carrier relaxation is characterized by the same large activation energy (~2000 K) as in the self-doped compound. This observation prompted us to suggest an unconventional metallic transport driven by collective electronic response.
description: 33 pages, 25 figures
The Origin of Matter at the Base of Relativistic Jets in Active Galactic Nuclei
Creators: name: Romero, Gustavo E.
name: Gutiérrez, Eduardo M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The generation of relativistic jets in active sources such as blazars is a complex problem with many aspects, most of them still not fully understood. Relativistic jets are likely produced by the accretion of matter and magnetic fields onto spinning black holes. Ergospheric dragging effects launch a Poynting-dominated outflow in the polar directions of these systems. Observations with very high resolution of the jet in the nearby radio galaxy M87 and evidence of extremely fast variability in the non-thermal radiation of several other objects indicate that charged particles produce synchrotron emission and gamma rays very close to the base of the jet. How these particles are injected into the magnetically shielded outflow is a mystery. Here we explore the effects of various processes in the hot accretion inflow close to the black hole that might result in the copious production of neutral particles which, through annihilation and decay in the jet's funnel, might load the outflow with mass and charged particles on scales of a few Schwarzschild radii.
description: 23 pages, 12 figures, accepted for publication in Universe. This article belongs to the Special Issue Black Holes and Relativistic Jets
Juan del Encina y su translación de las Bucólicas de Virgilio: aproximación a las ediciones salmantinas de 1507 y 1509
Creators: name: Oliva, Javier Pérez
Publisher: name: Zenodo
Year: 2021

description: El principal objetivo del presente Trabajo Fin de Máster es el análisis de la forma textual de la traducción de las Bucólicas de Virgilio, a la luz del estudio pormenorizado de las ediciones salmantinas de 1507 y 1509 del Cancionero de todas las obras del poeta de la misma ciudad, Juan del Encina, en las que el gran humanista español recogió esta parte de la obra virgiliana. La finalidad de este estudio es comprender, de esta manera, la tradición impresa del poeta latino que, como sabemos, fue uno de los autores clásicos más impresos en el contexto de las ediciones incunables y postincunables, en el Renacimiento, en general, en España y en los talleres de impresión de la ciudad de Salamanca.
description: Master Thesis
Essays on international business strategy of non-traditional goods
Creators: name: Ruckman, Karen Elizabeth
Publisher: name: University of British Columbia
Year: 2009

description: This thesis comprises three essays on international business strategy with regards to services and technology. The first essay investigates why the average expense ratio paid by Canadian mutual fund investors is 50% higher than that paid in U.S. This discrepancy is commonly thought to exist because Canadian funds do not take advantage of economies of scale and have less competition. A monopolistic competition framework is used to develop a model for the mutual fund industry. By allowing each fund to have different attributes, the model permits funds to charge different expense ratios in equilibrium and is found to strongly fit the North American mutual fund market. Empirical analysis indicates that these two common explanations and measurable fund attributes account for 15% of the discrepancy. The second essay analyses the U.S. mutual fund decision to enter the Canadian market through either foreign direct investment (FDI) or trade in advisement services. The total value of U.S.-controlled funds amounts to 18% of the Canadian equity fund market. This paper investigates how the fund-level and firm-level characteristics affect the channel used to enter the Canadian market. Empirical results indicate that the funds offered through FDI are not especially successful in the U.S. market but are associated with companies with large market shares, whereas the funds offered through trade in advisement services are highly successful in the U.S. market and are from companies with relatively few successful funds. The third essay compares the motivation for acquisition between foreign and domestic acquirers of U.S. drug companies, especially with regard to technology transfer. An estimation of the acquisition decision reveals that foreign acquirers choose targets with high research intensity more as their own intensity decreases while domestic acquirers choose targets with high research intensity more as their own intensity increases. Domestic acquirers' post-acquisition innovative productivity increases mostly due to efficiency of knowledge synthesis because the targets are usually have familiar product lines. Foreign acquirers' innovative productivity does not increase after acquisition because they tend to take over firms in unfamiliar research areas that are usually highly technical and require a long-term commitment of R&D.
Exchange Rate Misalignment and Its Effects on Agricultural Producer Support Estimates (PSEs) in India
Creators: name: Cheng, Fuzhi
name: Orden, David
name: Cheng, Fuzhi
name: Orden, David
Publisher: name: Unknown
Year: 2006
Subjects: Agricultural and Food Policy
International Relations/Trade

description: This paper examines the effects of the exchange rate misalignment on the agricultural Producer Support Estimates (PSEs) in India. Based on various time series techniques, the equilibrium exchange rate of the Indian rupee and the corresponding misalignment are estimated and applied to the calculations of the PSEs. Our results show that the indirect effect from exchange rate misalignment on India's agriculture has either amplified or counteracted the direct effect from sectoral-specific policies. The indirect effect of exchange rate overvaluation has potentially taxed the agricultural sector in India during the periods leading up to the financial crisis. However, the magnitude of these indirect effects becomes smaller in the later periods when the actual exchange rate moves closer to its equilibrium value.
Workflow Extensions Milestone 4.2 - MS9
Creators: name: Lawrence, Bryan
name: Kunkel, Julian
Publisher: name: Zenodo
Year: 2021
Subjects: ESiWACE
ESiWACE2
climate
weather
hpc

description: The milestone target was to report on the delivery of software to deliver tight integration between the scheduler (CYLC) and the I/O middleware (ESDM) so as to support maximally efficient use of storage resources during pre-exascale workflows. However, as the work was being done, analysis showed that the benefits available at this time of carrying out the planned tight integration would not warrant completing all the software development; we believe the existing level of integration with the scheduler running code which includes storage configuration delivers on the underlying requirements. Accordingly, we mark the milestone complete (the underlying requirement has been met), and have redeployed resource yielded by not completing the tight integration software on other aspects of WP4.
Baryon helicity in B decay
Creators: name: Suzuki, Mahiko
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The unexpectedly large transverse polarization measured in the B-to-phi K* decay poses the question whether it is accounted for as a strong interaction effect or possibly points to a hidden nonstandard weak interaction. We extend here the perturbative argument to the helicity structure of the two-body baryonic decay and discuss qualitatively on how the baryonic B decay modes might help us in understanding the issue raised by the B-to-VV decays. We find among others that the helicity +1/2 amplitude dominates in the leading order in the B (b-bar q) decay and that the dominant amplitude is sensitive to the right-handed penguin interaction.
description: References added and typos corrected
Kinematics of an isolated galaxy, CIG 993
Creators: name: Cárdenas-Martínez, Nelli
name: Fuentes-Carrera, Isaura
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present scanning Fabry-Perot interferometric observations of CIG 993, an apparently isolated luminous infrared galaxy also exhibiting luminous blue compact and Wolf-Rayet galaxy features, as well as high star formation rate. Our high resolution observations of the H$α$ emission line allowed us to derive the radial velocity field, as well as the velocity dispersion $σ$, and the residual velocity fields of the galaxy. This galaxy exhibits several kinematical components. On one hand, the velocity gradients detected on the velocity field can be associated with a rotating disk -contrary to previous results with less spectral resolution-. However, the velocity field, the $σ$ and residual velocity field show significant deviations from circular motions in the central part of the galaxy that matches a region with high number of Wolf-Rayet and O stars, coincident with the blue luminous component of the galaxy. We find narrow and broad velocity components for the ionized gas in the central part of the galaxy. The broad component is evidence of a central outflow related with the on-going burst of stellar formation. The morpho-kinematical analysis of the galaxy indicates we are only seeing the brightest parts of the galaxy which correspond to the bulge, a central bar and the beginning of the disk. We believe CIG 993 is a disk galaxy harboring important star-forming processes most likely caused by a relatively recent interaction. This could imply that small encounters could change the global characteristics of a galaxy without disturbing the main rotation disk motion, nor the morphology of the galaxy.
Analytic calculation of field-strength correlators
Creators: name: Simonov, Yu. A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Field correlators are expressed using background field formalism through the gluelump Green's functions. The latter are obtained in the path integral and Hamiltonian formalism. As a result behaviour of field correlators is obtained at small and large distances both for perturbative and nonperturbative parts. The latter decay exponentially at large distances and are finite at x=0, in agreement with OPE and lattice data.
description: 28 pages, no figures; new material added, misprints corrected
Modelling Organic Farming at Sector Level - An Application to the Reformed CAP in Austria
Creators: name: Schmid, Erwin
name: Sinabell, Franz
name: Schmid, Erwin
name: Sinabell, Franz
Publisher: name: Unknown
Year: 2006
Subjects: subject: Agricultural and Food Policy
subject: Farm Management
subject: Organic farming
subject: Common Agricultural Policy
subject: Program for Rural Development
subject: Agricultural sector modelling

description: We analyse whether the 2003 CAP reform and the anticipated new program of rural development will lead to an expansion or a reduction of organic farming. An extended version of the Positive Mathematical Programming (PMP) method is developed in order to differentiate organic farming from conventional and other agri-environmental management practices in a sector model. Austria is chosen for the case study because 8 % of its farmland are managed organically, and detailed data on alternative management practices are available. The results suggest that the recent agricultural policy reforms will make organic farming more attractive for farmers, given the price premiums relative to conventional products will remain at observed levels.
Retracts of vertex sets of trees and the almost stability theorem
Creators: name: Dicks, Warren
name: Dunwoody, M. J.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20E08 (Primary) 05C25, 20J05 (Secondary)

description: Let G be a group, let T be an (oriented) G-tree with finite edge stabilizers, and let VT denote the vertex set of T. We show that, for each G-retract V' of the G-set VT, there exists a G-tree whose edge stabilizers are finite and whose vertex set is V'. This fact leads to various new consequences of the almost stability theorem. We also give an example of a group G, a G-tree T and a G-retract V' of VT such that no G-tree has vertex set V'.
description: 15 pages, 0 figures. Formerly titled "Some refinements of the almost stability theorem". Version 3
Molecular dynamic investigations of liquid nickels structural properties
Creators: name: Kimmel, A.
name: Ladyanov, V.
name: Gusenkov, I.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The effective pair potentials of liquid nickel have been derived by means of the inverse self-consistent method from the experimental diffraction data. The potentials provide highly accurate coincidence of experimental and simulated structural properties. The statistical analysis of Voronoi polyhedral and Delaunau simplices has shown that in the vicinity of the melting point in the structure of liquid nickel there are relatively stable spatial polytetrahedral formations with local 5-folder symmetry. With temperature rise such formations evolve to isolate and compact ones with preserving of the local five-folder symmetry.
description: 8 pages, 4 figures
CDM Potential for Rural Transition in China Case Study: Options in Yinzhou District, Zhejiang Province
Creators: name: Zhao, Xingshu
name: Michaelowa, Axel
name: Zhao, Xingshu
name: Michaelowa, Axel
Publisher: name: Unknown
Year: 2004
Subjects: subject: Environmental Economics and Policy
subject: Clean Development Mechanism
subject: China
subject: urbanization
subject: energy efficiency

description: This paper aims to examine the potential of the Clean Development Mechanism (CDM) to address energy- related issues during the rural transition process in China, using a case study of quickly urbanizing and industrializing Yinzhou district in coastal Zhejiang province. Yinzhou's per capita GDP reached US$ 3100 in 2002, three times China's average, and is targeted to achieve $10,000 in 2020. We assess the current energy status of Yinzhou, and provide projections of energy consumption and CO2 emissions up to the year 2020. Energy resource shortages and limited possibilities to obtain coal-fired electricity from national grid illustrate the opening gap between energy supply and demand. We find that Yinzhou's CDM potential is concentrated in efficiency improvement on the demand side. In that context, we suggest to systematically explore the CDM potential in the industrial sector. Projects will have to involve many stakeholders and the necessary local capacity has to be built. These CDM projects can be considered as killing three birds with one stone, namely maintaining continuous economic growth, alleviating local environmental pollution as well as mitigating global climate change.
Supervised clustering of high dimensional data using regularized mixture modeling
Creators: name: Chang, Wennan
name: Wan, Changlin
name: Zang, Yong
name: Zhang, Chi
name: Cao, Sha
Publisher: name: arXiv
Year: 2020
Subjects: subject: Methodology (stat.ME)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Identifying relationships between molecular variations and their clinical presentations has been challenged by the heterogeneous causes of a disease. It is imperative to unveil the relationship between the high dimensional molecular manifestations and the clinical presentations, while taking into account the possible heterogeneity of the study subjects. We proposed a novel supervised clustering algorithm using penalized mixture regression model, called CSMR, to deal with the challenges in studying the heterogeneous relationships between high dimensional molecular features to a phenotype. The algorithm was adapted from the classification expectation maximization algorithm, which offers a novel supervised solution to the clustering problem, with substantial improvement on both the computational efficiency and biological interpretability. Experimental evaluation on simulated benchmark datasets demonstrated that the CSMR can accurately identify the subspaces on which subset of features are explanatory to the response variables, and it outperformed the baseline methods. Application of CSMR on a drug sensitivity dataset again demonstrated the superior performance of CSMR over the others, where CSMR is powerful in recapitulating the distinct subgroups hidden in the pool of cell lines with regards to their coping mechanisms to different drugs. CSMR represents a big data analysis tool with the potential to resolve the complexity of translating the clinical manifestations of the disease to the real causes underpinning it. We believe that it will bring new understanding to the molecular basis of a disease, and could be of special relevance in the growing field of personalized medicine.
Leptogenesis and tensor polarisation from a gravitational Chern-Simons term
Creators: name: Lyth, David H.
name: Quimbay, Carlos
name: Rodriguez, Yeinzon
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Within an effective field theory derived from string theory, the universal axion has to be coupled to the the gravitational Chern-Simons (gCS) term. During any era when the axion field is varying, the vacuum fluctuation of the gravitational wave amplitude will then be circularly polarised, generating an expectation value for the gCS term. The polarisation may be observable through the Cosmic Microwave Background, and the vacuum expectation value of the gCS term may generate the baryon asymmetry of the Universe. We argue here that such effects cannot be computed without further input from string theory, since the `vacuum' in question is unlikely to be the field-theoretic one.
description: Latex file. 10 pages. v2: Minor changes in the abstract and the conclusion. References added. Version accepted for publication in Journal of High Energy Physics. v3: Typos corrected. Erratum sent for publication
Stability theorems for chiral bag boundary conditions
Creators: name: Gilkey, Peter
name: Kirsten, Klaus
Publisher: name: arXiv
Year: 2005
Subjects: subject: Analysis of PDEs (math.AP)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 58J50

description: We study asymptotic expansions of the smeared L2-traces Fexp(-t P^2) and FPexp(-tP^2), where P is an operator of Dirac type and F is an auxiliary smooth endomorphism. We impose chiral bag boundary conditions depending on an angle theta. Studying the theta-dependence of the above trace invariants, theta-independent pieces are identified. The associated stability theorems allow one to show the regularity of the eta function for the problem and to determine the most important heat kernel coefficient on a four dimensional manifold.
Billiards, Invariant Measures, and Equilibrium Thermodynamics
Creators: name: Kozlov, V. V.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: The questions of justification of the Gibbs canonical distribution for systems with elastic impacts are discussed. A special attention is paid to the description of probability measures with densities depending on the system energy.
description: 14 pages, 1 figure
Explicit Actions for Electromagnetism with Two Gauge Fields with Only one Electric and one Magnetic Physical Fields
Creators: name: Ferreira, P. Castelo
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We extend the work of Mello et al. based in Cabbibo and Ferrari concerning the description of electromagnetism with two gauge fields from a variational principle, i.e. an action. We provide a systematic independent derivation of the allowed actions which have only one magnetic and one electric physical fields and are invariant under the discrete symmetries $P$ and $T$. We conclude that neither the Lagrangian, nor the Hamiltonian, are invariant under the electromagnetic duality rotations. This agrees with the weak-strong coupling mixing characteristic of the duality due to the Dirac quantization condition providing a natural way to differentiate dual theories related by the duality rotations (the energy is not invariant). Also the standard electromagnetic duality rotations considered in this work violate both $P$ and $T$ by inducing Hopf terms (theta terms) for each sector and a mixed Maxwell term. The canonical structure of the theory is briefly addressed and the 'magnetic' gauge sector is interpreted as a ghost sector.
description: v2: 12 pages; References added, discussion concerning degrees of freedom corrected; v3: is now used the standard normalization of 1/4 in the actions; the possibility of theta being a pseudo-scalar implied a title changing; eq (23) added; signs corrected in equations (39,45-47); references added