cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
1999 BUSINESS ANALYSIS SUMMARY FOR GENERAL LIVESTOCK FARMS
Creators: name: Nott, Sherrill B.
name: Nott, Sherrill B.
Publisher: name: Unknown
Year: 2000
Subjects: Livestock Production/Industries

description: Farm types were assigned using the 1992 Census of Agriculture's Standard Industrial Classification (SIC) definitions. Basically, any farm with 50 percent or more of value of farm sales from one item becomes a farm of that type. General livestock farms have 50 percent or more of value of combined sales from livestock and livestock products, such as milk, beef animals, hogs, and wool. This report is a summary of the financial and production records kept by dairy farmers enrolled in the Telfarm/MicroTel record program through Michigan State University Extension. Farm records were included if a Finan summary was completed on 1999 data including beginning and ending balance sheets, plus income and expenses. The summary was included if cash discrepancy was less than 10% of gross cash inflow, and if the debt discrepancy was less than $1,000. The averages are reported in the tables that follow; it should be recognized that considerable variability exists in the data. The unweighted mean of the net farm income for the 7 farms was $37,342, the standard deviation of the mean was $46,573 and the median was $37,342. The unweighted mean of the acres cropped was 738; the standard deviation of the mean was 214, and the median was 738. This report has three purposes: 1)to provide statistical information about the financial results on dairy farms during 1999; 2)to provide production costs for comparative analysis and forward planning; and 3)to provide information on the trends in resource use, income and costs during the last few years. Following long term trends may be a problem, as Telfarm/MicroTel and the Department of Agricultural Economics in 1995 adopted Finansum and a different software package for doing annual analysis. For general livestock farm averages of 1995, see Staff Paper No. 96-86, Michigan Farm Database, New Directions for 1995, which contains averages of 12 general livestock farms calculated with Finansum. During 1996 and 1997, there were not enough general livestock records in the system to publish averages. Staff Paper No. 99-33, 1998 Business Analysis Summary for General Livestock Farms, contains averages of 13 general livestock farms calculated with Finansum. These staff papers ave available from the author at http://www.msu.edu/user/nott
Relativistic Corrections in a Three-Boson System of Equal Masses
Creators: name: Droz-Vincent, Ph.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Three-body systems of scalar bosons are described in the framework of relativistic constraint dynamics. With help of a change of variables followed by a change of wave function, two redundant degrees of freedom get eliminated and the mass-shell constraints can be reduced to a three-dimensional eigenvalue problem. In general, this problem is complicated, but for three equal masses a drastic simplification arises at the first post-Galilean order: the reduced wave equation becomes tractable, and we can compute a first-order correction beyond the nonrelativistic limit. The harmonic interaction is displayed as a toy model.
description: 16 pages, no figure. Several points clarified, one typo corrected. References added. To appear in Physical Review A
Supermarkets and Michoacan Guava Farmers in Mexico
Creators: name: Berdegue, Julio A.
name: Reardon, Thomas
name: Balsevich, Fernando
name: Martinez, Anabel
name: Medina, Ruben
name: Aguirre, Marx
name: Echanove, Flavia
name: Berdegue, Julio A.
name: Reardon, Thomas
name: Balsevich, Fernando
name: Martinez, Anabel
name: Medina, Ruben
name: Aguirre, Marx
name: Echanove, Flavia
Publisher: name: Unknown
Year: 2006
Subjects: subject: Marketing
subject: FOS: Economics and business

description: This paper analyzes the participation of small farmers in the fresh fruit and vegetable supply systems of supermarkets in Mexico, using the case of small-scale guava farmers in the state of Michoacán. Three findings emerge. (1) The most important determinant of access of these farmers to more modern markets is their territorial (spatial) context and the way in which those territories interact with different markets, followed by fixed capital assets. Farm size, education and participation in organizations are not significant determinants. (2) Farmers working in the more modern markets compared to those in the traditional markets, are labor-constrained and overuse chemical inputs to a lesser extent. (3) Farmers that have accessed the more modern market channels, have substantially higher net income per hectare. Policies and projects aimed at promoting the inclusion in more modern markets of small-scale farmers such as those producing guava in Michoacán, must act on the territorial dimension of the problem of inclusion/exclusion, and not restrict themselves to actions aimed at improving the supply chains or the capacities of the households or their farms and organizations.
Tunneling-tip-induced collapse of the charge gap in the excitonic insulator Ta$_2$NiSe$_5$
Creators: name: He, Q.
name: Que, X.
name: Zhou, L.
name: Isobe, M.
name: Huang, D.
name: Takagi, H.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Tuning many-body electronic phases by an external handle is of both fundamental and practical importance in condensed matter science. The tunability mirrors the underlying interactions, and gigantic electric, optical and magnetic responses to minute external stimuli can be anticipated in the critical region of phase change. The excitonic insulator is one of the exotic phases of interacting electrons, produced by the Coulomb attraction between a small and equal number of electrons and holes, leading to the spontaneous formation of exciton pairs in narrow-gap semiconductors/semimetals. The layered chalcogenide Ta$_2$NiSe$_5$ has been recently discussed as such an excitonic insulator with an excitation gap of ~250 meV below $T_c$ = 328 K. Here, we demonstrate a drastic collapse of the excitation gap in Ta$_2$NiSe$_5$ and the realization of a zero-gap state by moving the tip of a cryogenic scanning tunneling microscope towards the sample surface by a few angstroms. The collapse strongly suggests the many-body nature of the gap in the insulating state of Ta$_2$NiSe$_5$, consistent with the formation of an excitonic state. We argue that the collapse of the gap is driven predominantly by the electrostatic charge accumulation at the surface induced by the proximity of the tip and the resultant carrier doping of the excitonic insulator. Our results establish a novel phase-change function based on excitonic insulators.
Type I planetary migration in a self-gravitating disk
Creators: name: Baruteau, C.
name: Masset, F.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We investigate the tidal interaction between a low-mass planet and a self-gravitating protoplanetary disk, by means of two-dimensional hydrodynamic simulations. We first show that considering a planet freely migrating in a disk without self-gravity leads to a significant overestimate of the migration rate. The overestimate can reach a factor of two for a disk having three times the surface density of the minimum mass solar nebula. Unbiased drift rates may be obtained only by considering a planet and a disk orbiting within the same gravitational potential. In a second part, the disk self-gravity is taken into account. We confirm that the disk gravity enhances the differential Lindblad torque with respect to the situation where neither the planet nor the disk feels the disk gravity. This enhancement only depends on the Toomre parameter at the planet location. It is typically one order of magnitude smaller than the spurious one induced by assuming a planet migrating in a disk without self-gravity. We confirm that the torque enhancement due to the disk gravity can be entirely accounted for by a shift of Lindblad resonances, and can be reproduced by the use of an anisotropic pressure tensor. We do not find any significant impact of the disk gravity on the corotation torque.
description: 42 pages, 17 figures, accepted for publication in ApJ
Grid computing method for atmospheric environmental capacity coupled with ventilation coefficient using CALPUFF simulation and GIS spatial analysis technology
Creators: name: Li, Tianxin
name: Chen, Xingyu
name: Wang, Xiugui
name: Zhao, Likai
name: Zhou, Xingchen
name: Zou, Anni
name: Ikhumhen, Harrison Odion
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Space Science
subject: Biotechnology
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: FOS: Biological sciences
subject: Biological Sciences not elsewhere classified
subject: Information Systems not elsewhere classified
subject: Plant Biology

description: Atmospheric environmental issues have evolved from point source pollution to regional pollution, leading to controlling specific air pollutant emissions. A-value method has been found suitable for estimating large-scale atmospheric environmental capacity rather than small-scale, resulting in the inaccuracy of developing air pollution control strategy. This study proposed a grid computing method based on the CALPUFF modeling system and GIS spatial analysis tool. The meteorological data from the MM5 model were used to simulate the spatial distribution of air pollutants. The meteorological flow field data was used to simulate the ventilation coefficient. The A value was revised with the simulated to achieve accurate results of atmospheric environment capacity. The credibility was verified by applying this method to Fengtai District, Beijing, China. The research area was divided into small partitions via the ArcGIS spatial analysis tool. The simulation results agreed well with the observation data from actual monitoring stations, even for the PM10 concentration with the most significant error (MRE: 7.05%-13.28%, RMSE: 11.62-17.89, R2: 0.84-0.90). The GIS spatial analysis tools were applied to match the underlying surface types and overcome the restrictions of administrative boundary management. The study proposed four schemes to achieve differentiated air pollutant emission reduction and develop suitable control strategies. Furthermore, this method can be applied on different scales of natural geographic boundaries and realize the precise spatial management of atmospheric environmental capacity.
Flexibility management with virtual batteries of thermostatically controlled loads: real-time control system and potential in Spain
Creators: name: Martín-Crespo, Alejandro
name: Saludes-Rodil, Sergio
name: Baeyens, Enrique
Publisher: name: arXiv
Year: 2020
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Load flexibility management is a promising approach to face the problem of balancing generation and demand in electrical grids. This problem is becoming increasingly difficult due to the variability of renewable energies. Thermostatically controlled loads can be aggregated and managed by a virtual battery, and they provide a cost-effective and efficient alternative to physical storage systems to mitigate the inherent variability of renewable energy sources. But virtual batteries require of an accurate control system being capable of tracking frequency regulation signals with minimal error. A real-time control system allowing virtual batteries to accurately track frequency or power signals is developed. The performance of this controller is validated for a virtual battery composed of 1,000 thermostatically controlled loads. Using virtual batteries equipped with the developed controller, a study focused on residential thermostatically controlled loads in Spain is performed. The results of the study quantify the potential of this technology in a country with different climate areas and provides insight about the feasibility of virtual batteries as enablers of electrical systems with high levels of penetration of renewable energy sources.
description: 26 pages, 13 figures
Nuttier Bubbles
Creators: name: Astefanesei, Dumitru
name: Mann, Robert B.
name: Stelea, Cristian
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We construct new explicit solutions of general relativity from double analytic continuations of Taub-NUT spacetimes. This generalizes previous studies of 4-dimensional nutty bubbles. One 5-dimensional locally asymptotically AdS solution in particular has a special conformal boundary structure of $AdS_3\times S^1$. We compute its boundary stress tensor and relate it to the properties of the dual field theory. Interestingly enough, we also find consistent 6-dimensional bubble solutions that have only one timelike direction. The existence of such spacetimes with non-trivial topology is closely related to the existence of the Taub-NUT(-AdS) solutions with more than one NUT charge. Finally, we begin an investigation of generating new solutions from Taub-NUT spacetimes and nuttier bubbles. Using the so-called Hopf duality, we provide new explicit time-dependent backgrounds in six dimensions.
description: 32 pages, 1 figure; v.3. typos corrected. Matches the published version
Diffusion and Home Range Parameters from Rodent Population Measurements in Panama
Creators: name: Giuggioli, L.
name: Abramson, G.
name: Kenkre, V. M.
name: Suzán, G.
name: Marcé, E.
name: Yates, T. L.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: Other Quantitative Biology (q-bio.OT)
subject: FOS: Biological sciences

description: Simple random walk considerations are used to interpret rodent population data collected in Hantavirus-related investigations in Panama regarding the short-tailed cane mouse, \emph{Zygodontomys brevicauda}. The diffusion constant of mice is evaluated to be of the order of (and larger than) 200 meters squared per day. The investigation also shows that the rodent mean square displacement saturates in time, indicating the existence of a spatial scale which could, in principle, be the home range of the rodents. This home range is concluded to be of the order of 70 meters. Theoretical analysis is provided for interpreting animal movement data in terms of an interplay of the home ranges, the diffusion constant, and the size of the grid used to monitor the movement. The study gives impetus to a substantial modification of existing theory of the spread of the Hantavirus epidemic which has been based on simple diffusive motion of the rodents, and additionally emphasizes the importance for developing more accurate techniques for the measurement of rodent movement.
description: 18 pages, 5 figures
Geometry of quantum complexity
Creators: name: Auzzi, Roberto
name: Baiguera, Stefano
name: De Luca, G. Bruno
name: Legramandi, Andrea
name: Nardelli, Giuseppe
name: Zenoni, Nicolò
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Computational complexity is a new quantum information concept that may play an important role in holography and in understanding the physics of the black hole interior. We consider quantum computational complexity for $n$ qubits using Nielsen's geometrical approach. We investigate a choice of penalties which, compared to previous definitions, increases in a more progressive way with the number of qubits simultaneously entangled by a given operation. This choice turns out to be free from singularities. We also analyze the relation between operator and state complexities, framing the discussion with the language of Riemannian submersions. This provides a direct relation between geodesics and curvatures in the unitaries and the states spaces, which we also exploit to give a closed-form expression for the metric on the states in terms of the one for the operators. Finally, we study conjugate points for a large number of qubits in the unitary space and we provide a strong indication that maximal complexity scales exponentially with the number of qubits in a certain regime of the penalties space.
description: 41 pages, several figures; v2: journal version; v3: journal title
Commodity Marketing Board Modernisation: The Queensland Experience
Creators: name: Jarratt, Ian S.
name: Brown, Hannah
name: Jarratt, Ian S.
name: Brown, Hannah
Publisher: name: Unknown
Year: 1995
Subjects: subject: Marketing
subject: FOS: Economics and business

description: This paper describes and explains the recent very rapid reduction in the number of commodity marketing boards (CMBs) in Queensland. The major causes included changed macro and micro economic policies, changes to national marketing arrangements, reduced producer support for compulsory delivery, producer interest in individual ownership of CMB assets, and producer demands for more flexible marketing systems. The key role of the Queensland Government in encouraging reviews of the CMBs, providing innovative and flexible legislative changes, and providing information and other assistance, is emphasised. Research on the effects of the changes in the commodity marketing arrangements is suggested.
Atmospheric Neutrino Fluxes
Creators: name: Gaisser, Thomas K.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Starting with an historical review, I summarize the status of calculations of the flux of atmospheric neutrinos and how they compare to measurements.
description: 14 pages, 8 figures, for Proceedings of Nobel Symposium 129 "Neutrino Physics"
Vibration Reduction by Stiffness Modulation -- a Theoretical Study
Creators: name: Nowak, Alexander
name: Campanile, L. Flavio
name: Hasse, Alexander
Publisher: name: arXiv
Year: 2020
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: Semi-active vibration reduction techniques are defined as techniques in which controlled actions do not operate directly on the system's degrees of freedom (as in the case of active vibration control) but on the system's parameters, i.e., mass, damping, or stiffness. Cyclic variations in the stiffness of a structural system have been addressed in several previous studies as an effective semi-active vibration reduction method. The proposed applications of this idea, denoted here as stiffness modulation, range from stepwise stiffness variations on a simple spring-mass system to continuous stiffness changes on rotor blades under aerodynamic loads. Semi-active systems are generally claimed to be energetically passive. However, changes in stiffness directly affect the elastic potential energy of the system and require external work under given conditions. In most cases, such injection or extraction of energy (performed by the device in charge of the stiffness variation and denoted as the pseudo-active effect) usually coexists with the semi-active effect, which operates by redistributing the potential energy within the system in such a way that it can be dissipated more efficiently. This work focuses on the discrimination between these two effects, which is absent in previous literature. A first study on their dependence on the process parameters of stiffness modulation is presented here, with emphasis on the spatial distribution of the stiffness changes. It is shown that localized changes tend to result in a larger semi-active share of vibration attenuation, whereas a spatially homogeneous stiffness modulation only generates a pseudo-active effect.
On Poincaré's Fourth and Fifth Examples of Limit Cycles at Infinity
Creators: name: Roeder, Roland K. W.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Dynamical Systems (math.DS)
subject: History and Overview (math.HO)
subject: FOS: Mathematics
subject: 37C10; 34C04; 34C07

description: Errors are found in example problems from Henri Poincaré's paper ``Mémoire sur les courbes définies par une équation différentielle.'' Examples four and five from chapter seven and examples one, two, and three from chapter nine do not have the limit cycles at infinity predicted by Poincaré. Instead they have fixed points at every point at infinity. In order to understand the errors made by Poincaré, examples four and five are studied at length. Replacement equations for the fourth and fifth examples are suggested based on the supposition that terms were omitted from Poincaré's equations.
description: 22 pages
Market Failure and Chemical Use
Creators: name: Brush, Greg J.
name: Clemes, Michael D.
name: Brush, Greg J.
name: Clemes, Michael D.
Publisher: name: Unknown
Year: 1995
Subjects: Farm Management
Health Economics and Policy

description: The objective of this paper is to develop a cost-benefit model that presents an analysis of the costs of implementing safe agrichemical practices, being the use of recommended protective equipment, and the benefits derived from these practices, being the reduced risk of consequent health problems. Initially, the cost-benefit analysis relies on surveys of the prevalence of short term acute cases of agrichemical poisoning among farmers and farm workers (inclusively termed farmers in the study), and epidemiological research on the elevated risks of cancer for farmers. The increased risks of health problems due to agrichemical exposure is then valued, using as a reference the literature on the willingness to pay for preventative action.
Spontaneous fluctuations of oxygen tension in tissue is similar to vasomotion of isolated pressurized arterioles
Creators: name: Karkan, Delara M.
Publisher: name: University of British Columbia
Year: 2009

description: The underlying mechanism of formation of spontaneous oscillations in tissue oxygen tension and their physiological significance remain unknown. The working hypothesis of this study were that the oxygen fluctuations are based on arteriolar vasomotion and that the frequency of oscillations in tissue oxygen tension is similar to spontaneous vasomotion of isolated pressurized arterioles. In addition we investigated whether oxygen fluctuations are altered under pathological conditions such as in malignant tissue. In this study, pO2 oscillations in the brain and skeletal muscles of rats were measured with an Eppendorf Oxygen electrode. Fluctuations in pO2 and changes in local temperature were coherent. These fluctuations did not correlate with heart rate, respiration rate or electroencephalogram (EEG). Surgical sectioning of the sciatic nerve and intravenus (i.v.) injection of the ganglion blocker, mecamylamine, did not alter pO2 oscillations in skeletal muscle. The histology of blood vessels in the measurement areas was assessed by light microscopy. Arterioles from muscle and brain surrounding the electrode track, were dissected, cannulated and pressurized in a myograph. Spontaneous oscillations were observed at normal physiological intravascular pressure. The frequency of spontaneous oscillations in vitro matched the frequency of pO2 fluctuations in vivo. Pharmacological studies of these oscillations show that local administration of phenylephrine (PE), an α-adrenoreceptor agonist to skeletal muscle, in vivo, increased the amplitude and frequency of pO2 oscillations but had only minor effects on oscillations in brain. Prostaglandin (PGFα1) increased the amplitude of these oscillations in the brain but had only a moderate effect in skeletal muscles. Similar results were observed when phenylephrine and U46619, a thromboxane analogue, were administered to isolated pressurized arterioles. L-type calcium channel antagonist, nifedipine was shown to decrease the frequency and amplitude of these oscillations both in vivo and in vitro. In mice implanted with squamous cell carcinoma (SCCVII) tumours, pO2 fluctuations (1-3 c/min) were observed in subcutaneous control and peripheral tumour tissue (2 c/min). These fluctuations were absent in most central zones close to necrosis areas. Injection of nicotinamide increased pO2 significantly (p<0.01) and also reinitiated pO2 fluctuations in 5 out of 10 hypoxic tumour areas. In conclusion, oscillations of oxygen tension recorded in tissue are similar to spontaneous vasomotion of isolated pressurized arterioles surrounding the electrode. These fluctuations are altered in hypoxic areas of malignant tissue.
The effect of post-Newtonian spin precessions on the evolution of exomoons' obliquity
Creators: name: Iorio, Lorenzo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Popular Physics (physics.pop-ph)
subject: FOS: Physical sciences

description: Putative natural massive satellites (exomoons) has gained increasing attention, where they orbit Jupiter-like planets within the habitable zone of their host main sequence star. An exomoon is expected to move within the equatorial plane of its host planet, with its spin ${\boldsymbol S}_\mathrm{s}$ aligned with its orbital angular momentum $\boldsymbol L$ which, in turn, is parallel to the planetary spin ${\boldsymbol S}_\mathrm{p}$. If, in particular, the common tilt of such angular momenta to the satellite-planet ecliptic plane, assumed fixed, has certain values, the latitudinal irradiation experienced on the exomoon from the star may allow it to sustain life as we know it, at least for certain orbital configurations. An Earth--analog (similar in mass, \textcolor{black}{radius, oblateness} and obliquity) is considered, which orbits within $5-10$ planetary radii $R_\mathrm{p}$ from its Jupiter-like host planet. The de Sitter and Lense--Thirring spin precessions due to the general relativistic post-Newtonian (pN) field of the host planet have an impact on an exomoon's habitability for a variety of different initial spin-orbit configurations. Here, I show it by identifying long--term variations in the satellite's obliquity $\varepsilon_\mathrm{s}$, where variations can be $\lesssim 10^\circ-100^\circ$, depending on the initial spin-orbit configuration, with a timescale of $\simeq 0.1-1$ million years. Also the satellite's quadrupole mass moment $J_2^\mathrm{s}$ induces obliquity variations which are faster than the pN ones, but do not cancel them.
description: LaTex2e, 36 pages, 12 figures, 6 tables. Effects of exomoon's own oblateness on its obliquity precession included
On the variation of the fine-structure constant: Very high resolution spectrum of QSO HE 0515-4414
Creators: name: Chand, Hum
name: Srianand, Raghunathan
name: Petitjean, Patrick
name: Aracil, Bastien
name: Quast, Ralf
name: Reimers, Dieter
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present a detailed analysis of a very high resolution (R\approx 112,000) spectrum of the quasar HE 0515-4414 obtained using the High Accuracy Radial velocity Planet Searcher (HARPS) mounted on the ESO 3.6 m telescope at the La Silla observatory. The HARPS spectrum, of very high wavelength calibration accuracy (better than 1 mÅ), is used to search for possible systematic inaccuracies in the wavelength calibration of the UV Echelle Spectrograph (UVES) mounted on the ESO Very Large Telescope (VLT). We have carried out cross-correlation analysis between the Th-Ar lamp spectra obtained with HARPS and UVES. The shift between the two spectra has a dispersion around zero of σ\simeq 1 mÅ. This is well within the wavelength calibration accuracy of UVES (i.e σ\simeq 4 mÅ). We show that the uncertainties in the wavelength calibration induce an error of about, Δα/α\le 10^{-6}, in the determination of the variation of the fine-structure constant. Thus, the results of non-evolving Δα/αreported in the literature based on UVES/VLT data should not be heavily influenced by problems related to wavelength calibration uncertainties. Our higher resolution spectrum of the z_{abs}=1.1508 damped Lyman-αsystem toward HE 0515-4414 reveals more components compared to the UVES spectrum. Using the Voigt profile decomposition that simultaneously fits the high resolution HARPS data and the higher signal-to-noise ratio UVES data, we obtain, Δα/α=(0.05\pm0.24)x10^{-5} at z_{abs}=1.1508. This result is consistent with the earlier measurement for this system using the UVES spectrum alone.
description: 14 pages, 13 figures, Accepted in A&A
Modelling Government Processes and Policies in Agriculture: A Review
Creators: name: Johnson, R.W.M.
name: Johnson, R.W.M.
Publisher: name: Unknown
Year: 1995
Subjects: Agricultural and Food Policy

description: In this paper, political preference functions and bargaining models based on game theory are examined for their relevance to government processes and policies in agriculture. While bargaining models show some refinements over preference models in explaining how interest group demands are met in a modern society, the results appear to still fall short of a well-documented understanding of the political economy and institutions involved in policy decisions. In practical terms, economic modelling is too time-consuming and elaborate to inform everyday decisions of government but an understanding of the principles involved and previous results of this kind of analysis can inform the work of both policy advisors and decision makers.
Surface and volume photoemission from metal nano-particles with electron mass discontinuity
Creators: name: Protsenko, I. E.
name: Uskov, A. V.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Quantum efficiencies of surface (SPE) and volume (VPE) photo-emissions from metal nanoparticles are calculated by quantum mechanical perturbation theory and compared with each other. Along with discontinuities in the potential barrier and dielectric function, the discontinuity in electron effective mass on the metal-environment interface is taken into account. General formulas for quantum efficiencies of SPE and VPE are derived. An example of spherical gold particles with rectangular potential barrier on the interface is considered, analytical formulas for quantum efficiencies of SPE and VPE on the red border of photoemission are derived. It is found that the efficiency of SPE is less decreased with the reduction of the electron effective mass than the efficiency of VPE, so SPE is more efficient that VPE for small particles and large discontinuity in effective mass. Nanoparticle size, when SPE is more efficient than VPE, is found to be tens of nm or less.
description: preprint
title: Han Solo and Kermit in the Classroom: Using Alter-Egos and Interactive Technology for Class Participation and Formative Assessment
title: Han Solo and Kermit the Frog in the Classroom: Using Alter-Egos and Interactive Technology for Class Participation and Formative Assessment
titleType: AlternativeTitle
Creators: name: Hartman, Lisa
Publisher: name: Maryland Shared Open Access Repository
Year: 2016

description: Lisa Hartman, an Ort reference librarian, delivered a presentation on instructional techniques at the 5th Annual Regional Conference on Teaching, Learning, & Scholarship (CTE) on January 14, 2016, at Frostburg State University.
description: This PowerPoint presentation explains how classroom participation can be improved by employing fictional characters as alter-egos for students. The presenter shares her experience and research regarding student engagement with alter-egos while interacting with  clickers, mobile devices, online surveys, Google docs, and other technologies.
Private Sector Initiatives in Nature Conservation
Creators: name: Bennett, Jeffrey W.
name: Bennett, Jeffrey W.
Publisher: name: Unknown
Year: 1995
Subjects: Resource /Energy Economics and Policy

description: The provision and management of protected natural areas has generally been regarded as the province of governments. Yet there are theoretical arguments to support the contention that the private sector can play a valuable role in nature conservation. There are also numerous examples of private sector initiatives in countries as economically, culturally and environmentally diverse as Australia, New Zealand, Germany and Vanuatu.
Accelerated Randomized Methods for Receiver Design in Extra-Large Scale MIMO Arrays
Creators: name: Rodrigues, Victor Croisfelt
name: Amiri, Abolfazl
name: Abrão, Taufik
name: de Carvalho, Elisabeth
name: Popovski, Petar
Publisher: name: arXiv
Year: 2020
Subjects: subject: Information Theory (cs.IT)
subject: Signal Processing (eess.SP)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Massive multiple-input-multiple-output (M-MIMO) features a capability for spatial multiplexing of large number of users. This number becomes even more extreme in extra-large (XL-MIMO), a variant of M-MIMO where the antenna array is of very large size. Yet, the problem of signal processing complexity in M-MIMO is further exacerbated by the XL size of the array. The basic processing problem boils down to a sparse system of linear equations that can be addressed by the randomized Kaczmarz (RK) algorithm. This algorithm has recently been applied to devise low-complexity M-MIMO receivers; however, it is limited by the fact that certain configurations of the linear equations may significantly deteriorate the performance of the RK algorithm. In this paper, we embrace the interest in accelerated RK algorithms and introduce three new RK-based low-complexity receiver designs. In our experiments, our methods are not only able to overcome the previous scheme, but they are more robust against inter-user interference (IUI) and sparse channel matrices arising in the XL-MIMO regime. In addition, we show that the RK-based schemes use a mechanism similar to that used by successive interference cancellation (SIC) receivers to approximate the regularized zero-forcing (RZF) scheme.
description: 12 pages, 6 figures, submitted to IEEE TVT
ТАЪЛИМ ТИЗИМИНИ МОЛИЯЛАШТИРИШ ВА МОЛИЯВИЙ РЕСУРСЛАРНИ ШАКЛЛАНТИРИШДА САМАРАДОРЛИК МАСАЛАСИ
Creators: name: Дусанов, Салим
Publisher: name: Zenodo
Year: 2024

description: Олий таълим ташкилотларни давлат миқёсида қўллаб-қувватлаш илк бора ХIХ асрда Франция ва Германияда кузатилди. Бироқ кейинги аср давомида турли хил мамлакатларда яратилган нодавлат олий таълим тизими худди шу тармоқнинг давлат секторига нисбатан анча самарали эканлигини кўрсатди
Agricultural Competitiveness After the Uruguay Round
Creators: name: Anderson, Kym
name: Anderson, Kym
Publisher: name: Unknown
Year: 1995
Subjects: International Relations/Trade

description: This paper examines the extent to which the Uruguay Round's implementation and other policy reforms are likely to alter the fortunes of Australasian and other farmers. It finds that, compared with other structural adjustment pressures, the Uruguay Round per se is likely to have a positive but relatively minor effect. Nonetheless, the net gains are likely to be very substantial relative to the efforts expended by the Cairns Group to ensure agricultural reform remained in the final agreement of the Round. Those gains will be larger the more the Cairns Group remains vigilant in ensuring (a) that the promised cuts in protection are actually implemented, (b) that the reforms are not accompanied by the imposition of compensating support policies and (c) that further cuts are delivered in the next round of negotiations to begin in 1999.
Persistent Identifiers for Instruments at HZB
Creators: name: Krahl, Rolf
Publisher: name: DataCite
Year: 2024
Subjects: Persistent Identifiers
Metadata
Instruments
Life Sciences
Astronomy
Metadata Game Changers

description: DataCite, in partnership with Metadata Game Changers, is excited to announce two community dialogue sessions designed to engage the broader Life Sciences and Astronomy communities in co-developing metadata enhancements supporting the development and use of persistent identifiers (PIDs) for instruments and projects. We would like to invite both metadata creators and users to join us and take an active role in advancing infrastructure solutions to identify, describe, discover, and track the impact of instruments and projects across domain communities.

The Persistent Identifiers for Instruments Community Dialogue will build on the work of the Persistent Identification of Instruments (PIDInst) group and the FAIR Facilities and Instruments Research Coordination Network.

Topics will include:

Ownership & provenance

Series & versioning

Replicability & reuse

Discoverability

Impact measurement

These dialogues represent the first phase of a larger project recently launched by DataCite. Generously funded by the Richard Lounsbery Foundation, this project aims to address present challenges in data accessibility, transparency, and reproducibility across the Life Science and Astronomy communities by fostering collaboration and developing transformative solutions. Insights, feedback, and proposed metadata enhancements gathered during these dialogues will directly inform subsequent prototype developments designed by DataCite.

Speaker: Rolf Krahl (Helmholtz-Zentrum Berlin für Materialien und Energie)

A recording of the presentation can be found here: https://www.youtube.com/watch?v=fjR5VaBMIqc&t=2045s
Forecasting in the Australian Lamb Industry: the Influence of Alternate Price Determination Processes
Creators: name: Vere, David T.
name: Griffith, Garry R.
name: Vere, David T.
name: Griffith, Garry R.
Publisher: name: Unknown
Year: 1995
Subjects: Demand and Price Analysis

description: The purpose of this paper is to evaluate the influence of alternate price determination specifications on the ability of a structural econometric model of the Australian prime lamb industry to accurately forecast saleyard lamb prices. Five variations of this model were specified according to the manner in which the farm prices of lamb were assumed to be determined. and these were used to produce 12 quarterly dynamic price forecasts over 1991:1 to 1993:4. The results confirmed the importance of the assumed nature of the price determination process in influencing the model's solution and its subsequent ability to forecast farm prices. Based on the forecasts' mean squared errors, the preferred specification was one which incorporated a traditional market balance and an exogenously-determined farm-retail price spread. This preference remained following an additional forecast comparison in which the structural models' forecasts were combined with those of an ARIMA model. As such, this price determination specification has been shown to be most applicable to a market such as that for Australian lamb which exhibits relatively small stocks and exports and a stable domestic demand.
Transition to a New World Economic Order Part II: Strategies
Creators: name: Calkins, Peter H.
name: Calkins, Peter H.
Publisher: name: Unknown
Year: 1995
Subjects: International Relations/Trade

description: Research on the transition to a new world economic order has already produced rich empirical results which help to validate sixteen specific research hypotheses for socialist and capitalist, underdeveloped and developed contexts, as well as the world economy as a whole. This multi-disciplinary literature on the NWO also maps out appropriate strategies that nations could follow to reach the goals of international efficiency, equity, equilibrium and positive evolution. Because of remaining lacunae and occasional disagreement, further research on the natural environment, economic motivation, social structures, political institutions, unifying values, and modeling techniques must be pursued. In addition to academic research, agricultural economists can play a fundamental social role in promoting a universal paradigm of transitions to a better NWO that integrates a whole series of innovative social and economic policies and institutions.
Quantizing Open Spin Chains with Variable Length: an example from Giant Gravitons
Creators: name: Berenstein, David
name: Correa, Diego H.
name: Vazquez, Samuel E.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study an XXX open spin chain with variable number of sites, where the variability is introduced only at the boundaries. This model arises naturally in the study of Giant Gravitons in the AdS/CFT correspondence. We show how to quantize the spin chain by mapping its states to a bosonic lattice of finite length with sources and sinks of particles at the boundaries. Using coherent states, we show how the Hamiltonian for the bosonic lattice gives the correct description of semiclassical open strings ending on Giant Gravitons.
description: 4 pages. v2: updated references
One-dimensional cluster growth and branching gels in colloidal systems with short-range depletion attraction and screened electrostatic repulsion
Creators: name: Sciortino, Francesco
name: Tartaglia, Piero
name: Zaccarelli, Emanuela
Publisher: name: arXiv
Year: 2005
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We report extensive numerical simulations of a simple model for charged colloidal particles in suspension with small non-adsorbing polymers. The chosen effective one-component interaction potential is composed of a short-range attractive part complemented by a Yukawa repulsive tail. We focus on the case where the screening length is comparable to the particle radius. Under these conditions, at low temperature, particles locally cluster into quasi one-dimensional aggregates which, via a branching mechanism, form a macroscopic percolating gel structure. We discuss gel formation and contrast it with the case of longer screening lengths, for which previous studies have shown that arrest is driven by the approach to a Yukawa glass of spherical clusters. We compare our results with recent experimental work on charged colloidal suspensions [A. I. Campbell {\it et al.} cond-mat/0412108, Phys. Rev. Lett. in press].
description: 14 pages, 25 figures
SO(5) non-Fermi liquid in a Coulomb box device
Creators: name: Mitchell, Andrew K.
name: Liberman, Alon
name: Sela, Eran
name: Affleck, Ian
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Non-Fermi liquid (NFL) physics can be realized in quantum dot devices where competing interactions frustrate the exact screening of dot spin or charge degrees of freedom. We show that a standard nanodevice architecture, involving a dot coupled to both a quantum box and metallic leads, can host an exotic SO(5) symmetry Kondo effect, with entangled dot and box charge and spin. This NFL state is surprisingly robust to breaking channel and spin symmetry, but destabilized by particle-hole asymmetry. By tuning gate voltages, the SO(5) state evolves continuously to a spin and then "flavor" two-channel Kondo state. The expected experimental conductance signatures are highlighted.
description: 4 pages, 3 figures + supplementary material
Charging For Agricultural Extension Services
Creators: name: Hone, Phillip
name: Hone, Phillip
Publisher: name: Unknown
Year: 1991
Subjects: Teaching/Communication/Extension/Profession

description: The implications of recent trends in the delivery and financing of agricultural extension services are assessed. The economic consequences of the introduction of charges and the increased reliance on private consultants to deliver extension services are considered in terms of their efficiency and distributional consequences. It is concluded that there is a strong efficiency case for charging for most extension activities. The presence of externalities or non-rival consumption properties in some extension activities does not establish that subsidised provision would be justified from an efficiency perspective. The impact of the price elasticities of demand for extension services and rural output on the distributional consequences of alternative funding options is considered.
Beyond the thin-wall approximation : precise numerical computation of prefactors in false vacuum decay
Creators: name: Dunne, Gerald V.
name: Min, Hyunsoo
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present a general numerical method for computing precisely the false vacuum decay rate, including the prefactor due to quantum fluctuations about the classical bounce solution, in a self-interacting scalar field theory modeling the process of nucleation in four dimensional spacetime. This technique does not rely on the thin-wall approximation. The method is based on the Gelfand-Yaglom approach to determinants of differential operators, suitably extended to higher dimensions using angular momentum cutoff regularization. A related approach has been discussed recently by Baacke and Lavrelashvili, but we implement the regularization and renormalization in a different manner, and compare directly with analytic computations made in the thin-wall approximation. We also derive a simple new formula for the zero mode contribution to the fluctuation prefactor, expressed entirely in terms of the asymptotic behavior of the classical bounce solution.
description: 28 pages, 8 figures
Berufen zur Einheit oder die epikletische Bedeutung der kirchlichen Gemeinschaft
Creators: name: Nēsiōtēs, Nikos A.
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 26 Nr. 3 (1977): Ökumenische Rundschau, Band 26, Heft 3
Quantum telecommunication based on atomic cascade transitions
Creators: name: Chaneliere, T.
name: Matsukevich, D. N.
name: Jenkins, S. D.
name: Kennedy, T. A. B.
name: Chapman, M. S.
name: Kuzmich, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A quantum repeater at telecommunications wavelengths with long-lived atomic memory is proposed, and its critical elements are experimentally demonstrated using a cold atomic ensemble. Via atomic cascade emission, an entangled pair of 1530 nm and 780 nm photons is generated. The former is ideal for long-distance quantum communication, and the latter is naturally suited for mapping to a long-lived atomic memory. Together with our previous demonstration of photonic-to-atomic qubit conversion, both of the essential elements for the proposed telecommunications quantum repeater have now been realized.
description: 5 pages, 4 figures
Hilbert modular forms with prescribed ramification
Creators: name: Weinstein, Jared
Publisher: name: arXiv
Year: 2008
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 32N10

description: Let $K$ be a totally real field. In this article we present an asymptotic formula for the number of Hilbert modular cusp forms $f$ with given ramification at every place $v$ of $K$. When $v$ is an infinite place, this means specifying the weight of $f$ at $k$, and when $v$ is finite, this means specifying the restriction to inertia of the local Weil-Deligne representation attached to $f$ at $v$. Our formula shows that with essentially finitely many exceptions, the cusp forms of $K$ exhibit every possible sort of ramification behavior, thus generalizing a theorem of Khare and Prasad. From this fact we compute the minimal field over which a modular Jacobian becomes semi-stable.
description: 30 pages, published version