cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Analysis of retinotectal regeneration in goldfish using polar dimensions: temporal sequence and spatial order
Creators: name: Mansfield, David Colin
Publisher: name: The Open University
Year: 1985

description: Quantitative analysis of electrophysiological visuotectal maps using polar dimensions demonstrated uniform representation of visual field on goldfish optic tectum, with topography equally precise in normal and "mature" regenerated projections. The precision of circumferential topography exceeds and is not correlated with that of radial. Radial orderliness may he poor without diminution of circumferential order: these two dimensions of pattern could he generated separately from each other. The method of analysis also allows quantitation of the orientation of the retinotectal projection. During development radial retinotopy in the sequence of axon growth could contribute to radial topography by confining optic terminals to specific annuli within the projection. The possibility of pattern formation by this means during regeneration was studied by examining the sequence of fibre growth by retrograde labelling of ganglion cells with horseradish peroxidase (HRP), applied to a cut through the optic tract at successive intervals after optic nerve transection in mid-orbit. Most results indicated a central-to-peripheral sequence of regeneration; others showed absence of retinotopic sequence. Regeneration of axons from central retina was delayed by repetition of axotomy. Subsequent visuotectal maps were either normal or included electrophysiologically weak representation of central visual field on peripheral tectum, outside or superimposed upon the map of peripheral field. Some of the abnormal maps also contained normal representation of central field on central tectum. Because of the contradictions in these results, the influence of temporal sequence on spatial order of connections remains uncertain. Formation of circumferential topography was investigated by anterograde tracing with HRP of axons from narrow sectors of retina in normal and regenerated pathways. Juxtaposition of labelled axons appears to be completely lost in the optic chiasm or at the site of optic nerve transection. Contact guidance of axons therefore cannot explain circumferential order in the map. Labelling was inadequate to show whether regenerating fibres resegregate retinotopically in the optic tract.
Teaching Practices and University Student Well-being : an Outcome Evaluation
Creators: name: Hurvitz, Serena
name: Mortazavi, Negah
name: Lee, Michael
name: Jarus, Tal
Publisher: name: The University of British Columbia
Year: 2017

description: Student mental health is an increasing concern on university campuses, which can greatly impact learning. Different teaching practices can result in various learning outcomes. However, there is a gap in literature regarding the impact of teaching practices on student well-being. Our previous studies identified teaching strategies that promote student well-being by surveying students in a university in West Coast Canada in 2015-2016. We designed knowledge translation events on specific teaching practices that enhance student wellness. Accordingly, six knowledge translation events were presented to instructors from various faculties of the above identified university through symposiums and poster presentations. This project evaluated the effectiveness of these events by instructors’ reports before and after on their perceptions of their knowledge, skills, and sense of responsibility around supporting student well-being. Although not significant, the findings of this study suggest that instructors’ awareness is improved after participation in one knowledge translation event.
Outlook and Perspective of Croatian Pork Meat Market - Partial Equilibrium Model Simulation
Pregled i perspektiva tržišta svinjskog mesa u Republici Hrvatskoj - simulacija modelom parcijalne ravnoteže
Creators: name: Kranjac, David
name: Zmaić, Krunoslav
name: Erjavec, Emil
name: Kranjac, David
name: Zmaić, Krunoslav
name: Erjavec, Emil
Publisher: name: Unknown
Year: 2018
Subjects: subject: Agribusiness
subject: AGMEMOD
subject: partial equilibrium model
subject: simulation
subject: pigs
subject: pork

description: Outlook on Croatian pork meat market up to the year 2030 was simulated by AGMEMOD partial equilibrium model. The results simulate future changes in the number of pigs, production, consumption, imports, exports and price of pork meat under ceteris paribus market conditions, along with the existing structure of agrarian policy until the end of the simulated period. Despite the decrease in the number of pigs and pork meat production before and after EU accession, a slight recovery of the pork meat market is expected in the forthcoming period. However, domestic production will not meet domestic demand, and Croatia will continue to import pork meat by the end of the simulated period.
Scenarios for Improving Business of a Beekeeping Farm – Case Study
Scenariji unapređenja poslovanja pčelarskog gospodarstva – studij slučaja
Creators: name: Šakić-Bobić, Branka
name: Merkaš, Danijel
name: Maja-Mihaela Salopek
name: Sremić, Marta
name: Vagan, Jasmina
name: Tajana Čop
name: Šakić-Bobić, Branka
name: Merkaš, Danijel
name: Maja-Mihaela Salopek
name: Sremić, Marta
name: Vagan, Jasmina
name: Tajana Čop
Publisher: name: Unknown
Year: 2018
Subjects: subject: Agribusiness
subject: beekeeping
subject: case study
subject: competitiveness
subject: efficiency
subject: family farm
subject: scenarios

description: The aim of this paper is to detect possibilities for improving business of the selected beekeeping farm which has four scenarios available: 1. migratory beekeeping; 2. increasing the range of products; 3. selling at market places and open-air shops; and 4. export of honey. Increased range of products and export to a foreign market proved to be the most profitable scenarios, but scenarios can be combined as well.
Persistent currents in carbon nanotubes based rings
Creators: name: Latil, S.
name: Roche, S.
name: Rubio, A.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Persistent currents in rings constructed from carbon nanotubes are investigated theoretically. After studying the contribution of finite temperature or quenched disorder on covalent rings, the complexity due to the bundle packing is addressed. The case of interacting nanotori and self-interacting coiled nanotubes are analyzed in details in relation with experiments.
description: 7 sections, 9 figures
Ecological Modernisation and Rural Development: Between Theory and Practice
Ekološka modernizacija i ruralni razvoj: između teorije i prakse
Creators: name: Arapović, Josipa
name: Nataša Bokan
name: Arapović, Josipa
name: Nataša Bokan
Publisher: name: Unknown
Year: 2018
Subjects: subject: Agribusiness
subject: ecological modernisation
subject: rural development
subject: development theory

description: In this paper we shortly present the theory of ecological modernisation and its relation to the concept of rural development. We try to establish whether those two concepts are compatible and whether they benefit from each other. Our findings show that rural development benefits from ecological modernisation, and we point out some areas of rural experience which could bring more work and life quality to rural communities through ecological modernising. Instead of offering a definite conclusion, we raise several questions in order to inspire some future research and reflections on the interplay between rural development and ecological modernisation.
Pedestrian orientation dynamics from high-fidelity measurements
Creators: name: Willems, Joris
name: Corbetta, Alessandro
name: Menkovski, Vlado
name: Toschi, Federico
Publisher: name: arXiv
Year: 2020
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Machine Learning (cs.LG)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: We investigate in real-life conditions and with very high accuracy the dynamics of body rotation, or yawing, of walking pedestrians - an highly complex task due to the wide variety in shapes, postures and walking gestures. We propose a novel measurement method based on a deep neural architecture that we train on the basis of generic physical properties of the motion of pedestrians. Specifically, we leverage on the strong statistical correlation between individual velocity and body orientation: the velocity direction is typically orthogonal with respect to the shoulder line. We make the reasonable assumption that this approximation, although instantaneously slightly imperfect, is correct on average. This enables us to use velocity data as training labels for a highly-accurate point-estimator of individual orientation, that we can train with no dedicated annotation labor. We discuss the measurement accuracy and show the error scaling, both on synthetic and real-life data: we show that our method is capable of estimating orientation with an error as low as 7.5 degrees. This tool opens up new possibilities in the studies of human crowd dynamics where orientation is key. By analyzing the dynamics of body rotation in real-life conditions, we show that the instantaneous velocity direction can be described by the combination of orientation and a random delay, where randomness is provided by an Ornstein-Uhlenbeck process centered on an average delay of 100ms. Quantifying these dynamics could have only been possible thanks to a tool as precise as that proposed.
Lessons from eclectic flavor symmetries
Creators: name: Nilles, Hans Peter
name: Ramos-Sanchez, Saul
name: Vaudrevange, Patrick K. S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: A top-down approach to the flavor problem motivated from string theory leads to the concept of eclectic flavor groups that combine traditional and modular flavor symmetries. To make contact with models constructed in the bottom-up approach, we analyze a specific example based on the eclectic flavor group Omega(1) (a nontrivial combination of the traditional flavor group Delta(54) and the finite modular group T') in order to extract general lessons from the eclectic scheme. We observe that this scheme is highly predictive since it severely restricts the possible group representations and modular weights of matter fields. Thereby, it controls the structure of the Kaehler potential and the superpotential, which we discuss explicitly. In particular, both Kaehler potential and superpotential are shown to transform nontrivially, but combine to an invariant action. Finally, we find that discrete R-symmetries are intrinsic to eclectic flavor groups.
description: 30 pages, 2 tables, 1 figure; v2: assumptions clarified, references added and updated, matches version published in NPB
Packages of Practices; A Step at a Time with Clusters?
Creators: name: Mann, Charles K.
name: Mann, Charles K.
Publisher: name: Unknown
Year: 1977
Subjects: Livestock Production/Industries

description: Despite increased use of modem technology, few Turkish wheat farmers have adopted the complete recommended package of practices. Reconsidering the package as clusters of practices adopted in an agronomically and economically logical sequence provides a better explanation of farmer behavior and a guide for useful agronomic experimentation and economic analysis.
title: Elite Migration from the Liberal to the Labour Party, 1917-1924, and the interaction with Popular Politics through the Union of Democratic Control.
Creators: name: Woodward, Brian Charles
Publisher: name: The Open University
Year: 1984

description: Following a preface indicating aims, Chapter 1 outlines the general situation of European elites in 1914 and the particular problem of an elite attempting to re-direct British public opinion in war-time through the agency of a pressure group. In Chapter 2 the aims and organisation of the U.D.C. are outlined. Chapter 3 indicates the nature of the U.D.C.'s involvement in popular politics: the membership ;connections with organised labour; branch proliferation; structure of communication flow; commitment to special effort in popular education; reactionary response to the U.D.C.; the stimulus of 1917; the Union’s change of policy after the Versailles settlement and retreat from immediate popular involvement. Chapter 4 is concerned with the factors involved in the Liberal U.D.C. elite’s migration to Labour: the nature of the migration from 1917 to 1924; ’rejective’ pressures and reformulatory forces; the dilemma of Radical allegiance illustrated in the correspondence of E.D.Morel; the common background and diverse pathways of nine prominent Liberal U.D.C. migrants to Labour. In Chapter 5 the factors connected with the U.D.C’s interaction with popular politics and the Liberal elite’s migration to Labour are reviewed and reinforced. The place of the U.D.C. within the background of pressure groups is outlined and the Union’s connections with the women’s movement and pacifist groups are indicated. Some wider ideological implications of Liberal-Labour definitions are discussed and the U.D.C.’s intervention in Labour Party politics is considered, with special reference to its influence upon the construction of a more sophisticated foreign policy. Chapter 5 concludes that the U.D.C, provided a pathway for Liberal elite migration to Labour after 1917 and that the Union’s intervention in popular politics was significant. The appendices include a review of the ideological background and a brief consideration of the U.D.C. elite’s ’pro-German involvement’.
The ACS Virgo Cluster Survey II. Data Reduction Procedures
Creators: name: Jordan, Andres
name: Blakeslee, John P.
name: Peng, Eric W.
name: Mei, Simona
name: Cote, Patrick
name: Ferrarese, Laura
name: Tonry, John L.
name: Merritt, David
name: Milosavljevic, Milos
name: West, Michael J.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The ACS Virgo Cluster Survey is a large program to carry out multi-color imaging of 100 early-type members of the Virgo Cluster using the Advanced Camera for Surveys (ACS) on the Hubble Space Telescope. Deep F475W and F850LP images (~ SDSS g and z) are being used to study the central regions of the program galaxies, their globular cluster systems, and the three-dimensional structure of Virgo itself. In this paper, we describe in detail the data reduction procedures used for the survey, including image registration, drizzling strategies, the computation of weight images, object detection, the identification of globular cluster candidates, and the measurement of their photometric and structural parameters.
description: 33 pages, 8 figures. Accepted for publication in ApJS. Also available at http://www.physics.rutgers.edu/~pcote/acs/publications.html
PROJECTED IMPACT OF LOWER GRANITE DAM AND SUGGESTED WATERWAY USER FEES ON PACIFIC NORTHWEST WHEAT MOVEMENT · '
PROJECTED JhP/\C:T OF 1.0\~ER GRANITE D/\M J\;-lD SUGG ST ·o WATfR\-1/\Y USER FE[S Oi~ PACIFIC NORTIU-!EST HHE.ii.T 1•:0 1 · '
Creators: name: Thayer, Robert
name: Casavant, Ken
name: Thayer, Robert
name: Casavant, Ken
Publisher: name: Unknown
Year: 1977
Subjects: Public Economics

description: This paper reports on a regional study of the impact of (1) improvements in water navigation and {2) waterway user charges on wheat movements. A transportation model minimizing transportation costs served as the analytical r,)ode 1. It was found that. as expected, shippers and geographical areas in close proximity to the river gained from improved navigation. Not so expectedly, the strong competitive reaction of the railroads allowed distant areas and producers to gain from improved waterways.
Custom Feed Milling in the Midwest: Model Plant Operations, Costs, and Charges
Creators: name: Vosloh, Carl J.
name: Askew, William R.
name: Brensike, V. John
name: Vosloh, Carl J.
name: Askew, William R.
name: Brensike, V. John
Publisher: name: Unknown
Year: 1958
Subjects: Crop Production/Industries
Labor and Human Capital
Livestock Production/Industries
Production Economics
Research and Development/Tech Change/Emerging Technologies
Research Methods/ Statistical Methods

description: Excerpts from the report Preface: This report on costs and charges in custom feed mills is the final report on a study of custom feed milling in the Midwest. A preliminary report, "Cost Standards for a Model Stationary Custom Feed Mill for the Midwest/' AMS-215, covered the cost standards for a model custom feed mill and much of that report is included. This model mill also is used as the basis for comparisons between current industry costs and incomes. The Department of Agriculture conducted this study of custom milling because farmers have a double stake in the costs of operating these mills. They may benefit either as producers of many of the ingredients used or as purchasers of the services and products of the industry. The model mill designed in this report can become a tool of management, and the cost and income comparisons will help many operators understand better the cost and income situation of their custom operation. This project is part of a broad program of research to improve the efficiency and cut the costs in marketing farm products.
Matter collineations of Spacetime Homogeneous Gödel-type Metrics
Creators: name: Camci, U.
name: Sharif, M.
Publisher: name: arXiv
Year: 2003
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The spacetime homogeneous Gödel-type spacetimes which have four classes of metrics are studied according to their matter collineations. The obtained results are compared with Killing vectors and Ricci collineations. It is found that these spacetimes have infinite number of matter collineations in degenerate case, i.e. det$(T_{ab}) = 0$, and do not admit proper matter collineations in non-degenerate case, i.e. det$(T_{ab}) \ne 0$. The degenerate case has the new constraints on the parameters $m$ and $w$ which characterize the causality features of the Gödel-type spacetimes.
description: 12 pages, LaTex, no figures, Class. Quantum.Grav.20 (2003) 2169
Tensor Recovery from Noisy and Multi-Level Quantized Measurements
Creators: name: Wang, Ren
name: Wang, Meng
name: Xiong, Jinjun
Publisher: name: arXiv
Year: 2019
Subjects: subject: Machine Learning (cs.LG)
subject: Signal Processing (eess.SP)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Higher-order tensors can represent scores in a rating system, frames in a video, and images of the same subject. In practice, the measurements are often highly quantized due to the sampling strategies or the quality of devices. Existing works on tensor recovery have focused on data losses and random noises. Only a few works consider tensor recovery from quantized measurements but are restricted to binary measurements. This paper, for the first time, addresses the problem of tensor recovery from multi-level quantized measurements. Leveraging the low-rank property of the tensor, this paper proposes a nonconvex optimization problem for tensor recovery. We provide a theoretical upper bound of the recovery error, which diminishes to zero when the sizes of dimensions increase to infinity. Our error bound significantly improves over the existing results in one-bit tensor recovery and quantized matrix recovery. A tensor-based alternating proximal gradient descent algorithm with a convergence guarantee is proposed to solve the nonconvex problem. Our recovery method can handle data losses and do not need the information of the quantization rule. The method is validated on synthetic data, image datasets, and music recommender datasets.
A tomographic map of the large-scale matter distribution using the eBOSS Stripe 82 Ly-$α$ forest
Creators: name: Ravoux, C.
name: Armengaud, E.
name: Walther, M.
name: Etourneau, T.
name: Pomarède, D.
name: Palanque-Delabrouille, N.
name: Yèche, C.
name: Bautista, J.
name: Bourboux, H. du Mas des
name: Chabanier, S.
name: Dawson, K.
name: Goff, J. -M. Le
name: Lyke, B.
name: Myers, A. D.
name: Petitjean, P.
name: Pieri, M. M.
name: Rich, J.
name: Rossi, G.
name: Schneider, D. P.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The Lyman-$α$ (hereafter Ly-$α$) forest is a probe of large-scale matter density fluctuations at high redshift, $z > 2.1$. It consists of HI absorption spectra along individual lines-of-sight. If the line-of-sight density is large enough, 3D maps of HI absorption can be inferred by tomographic reconstruction. In this article, we investigate the Ly-$α$ forest available in the Stripe 82 field ($220\,\mathrm{deg^{2}}$), based on the quasar spectra from SDSS Data Release DR16. The density of observed quasar spectra is $37\,\mathrm{deg^{-2}}$ with a mean pixel signal-to-noise ratio of two per angstrom. This study provides an intermediate case between the average SDSS density and that of the much denser but smaller CLAMATO survey. We derive a 3D map of large-scale matter fluctuations from these data, using a Wiener filter technique. The total volume of the map is $0.94\,\mathrm{h^{-3} Gpc^{3}}$. Its resolution is $13\,\mathrm{h^{-1} Mpc}$, which is related to the mean transverse distance between nearest lines-of-sight. From this map, we provide a catalog of voids and protocluster candidates in the cosmic web. The map-making and void catalog are compared to simulated eBOSS Stripe 82 observations. A stack over quasar positions provides a visualization of the Ly-$α$ quasar cross-correlation. This tomographic reconstruction constitutes the largest-volume high-redshift 3D map of matter fluctuations.
Distinguishing mixed quantum states: Minimum-error discrimination versus optimum unambiguous discrimination
Creators: name: Herzog, Ulrike
name: Bergou, Janos A.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider two different optimized measurement strategies for the discrimination of nonorthogonal quantum states. The first is conclusive discrimination with a minimum probability of inferring an erroneous result, and the second is unambiguous, i. e. error-free, discrimination with a minimum probability of getting an inconclusive outcome, where the measurement fails to give a definite answer. For distinguishing between two mixed quantum states, we investigate the relation between the minimum error probability achievable in conclusive discrimination, and the minimum failure probability that can be reached in unambiguous discrimination of the same two states. The latter turns out to be at least twice as large as the former for any two given states. As an example, we treat the case that the state of the quantum system is known to be, with arbitrary prior probability, either a given pure state, or a uniform statistical mixture of any number of mutually orthogonal states. For this case we derive an analytical result for the minimum probability of error and perform a quantitative comparison to the minimum failure probability.
description: Replaced by final version, accepted for publication in Phys. Rev. A. Revtex4, 6 pages, 3 figures
title: Cognitive complexity revisited
Creators: name: Watts, Jenny
Publisher: name: The Open University
Year: 1987

description: Cognitive Complexity is an important and obtrusive phenomenon over a wide range of situations, and is worthy of study in its own right. Although the term "Cognitive Complexity" occurs in an informal way in the psychological literature, there is no general agreement about what it means or connotes. A new approach was needed in order to re-conceptualise cognitive complexity. This re-conceptualisation originated in the unobtrusive observation of cognitive complexity in a relatively free, uncontrolled and naturalistic environment. From this came the formulation of an appropriate and explicit methodology, which encouraged subjects to display cognitive complexity in an unhurried way in a private interview situation by talking about topics in the news and personal issues. Initial experimental techniques (including an impressionistic analysis, pen pictures and a content analysis), led on to the development of the main analysis which identified types of cognitive complexity and their constituents in the interview transcripts. The types of cognitive complexity identified were true (divided into outstanding and pedestrian), disjunctive, borderline, no cognitive complexity and secondhand cognitive complexity. The main constituents of true cognitive complexity (outstanding) were systemic and penetrating thinking, independence of thought and truth-seeking. Pedestrian cognitive complexity was characterised by analogical and investigative reasoning, clarity and incisiveness. The importance of this re-conceptualisation of cognitive complexity is that it has resulted in the development of a new methodology which facilitates the display by subjects of more than one type of cognitive complexity. This methodology which identifies the types of cognitive complexity can be applied in real-life situations in which people are facing complex decisions.
Investigation of the Molecular Mechanisms Underpinning the Broad Antiviral Activity of Viperin
Creators: name: Crosse, Keaton
Publisher: name: La Trobe
Year: 2021
Subjects: subject: Molecular Biology
subject: 60506 Virology
subject: FOS: Biological sciences

description: A thesis submitted in total fulfilment of the requirements for the degree of Doctor of Philosophy to the Department of Physiology, Anatomy and Microbiology, School of Life Sciences, College of Science, Health and Engineering, La Trobe University, Victoria, Australia.
Sum rules and energy scales in the high-temperature superconductor YBa2Cu3O6+x
Creators: name: Homes, C. C.
name: Dordevic, S. V.
name: Bonn, D. A.
name: Liang, Ruixing
name: Hardy, W. N.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The Ferrell-Glover-Tinkham (FGT) sum rule has been applied to the temperature dependence of the in-plane optical conductivity of optimally-doped YBa_2Cu_3O_{6.95} and underdoped YBa_2Cu_3O_{6.60}. Within the accuracy of the experiment, the sum rule is obeyed in both materials. However, the energy scale ω_c required to recover the full strength of the superfluid ρ_s in the two materials is dramatically different; ω_c \simeq 800 cm^{-1} in the optimally doped system (close to twice the maximum of the superconducting gap, 2Δ_0), but ω_c \gtrsim 5000 cm^{-1} in the underdoped system. In both materials, the normal-state scattering rate close to the critical temperature is small, Γ< 2Δ_0, so that the materials are not in the dirty limit and the relevant energy scale for ρ_s in a BCS material should be twice the energy gap. The FGT sum rule in the optimally-doped material suggests that the majority of the spectral weight of the condensate comes from energies below 2Δ_0, which is consistent with a BCS material in which the condensate originates from a Fermi liquid normal state. In the underdoped material the larger energy scale may be a result of the non-Fermi liquid nature of the normal state. The dramatically different energy scales suggest that the nature of the normal state creates specific conditions for observing the different aspects of what is presumably a central mechanism for superconductivity in these materials.
description: RevTeX 4 file, 9 pages with 7 embedded eps figures
A MODIFIED LOCKSET APPROACH TO ROUTING BACKHAUL EFFECTIVENESS
Creators: name: Robbins, Lynn W.
name: Robbins, Lynn W.
Publisher: name: Unknown
Year: 1977
Subjects: Public Economics

description: An attempt to simulate and improve upon a distribution system led to the formulation of a lockset algorithm that included a backhaul routing capacity. The problem that motivated the modification is presented. The related methodological characteristics of capacity control, load-size/ loading time trade-off and visit-frequency are discussed.
An Econometric Model of World Wheat Trade With Emphasis on U.S. Exports
Creators: name: Mitchell, Donald O.
name: Mitchell, Donald O.
Publisher: name: Unknown
Year: 1977
Subjects: Crop Production/Industries

description: An econometric model of the international wheat market is developed and evaluated for forecasting U.S. wheat exports over a one year period. The model attempts to capture the essential elements of the demand for U.S. wheat exports by explaining the linkages between wheat importing and exporting regions. A total of 112 countries are aggregated into fourteen importing regions and five exporting regions. Net import demand equations are estimated for each of the fourteen importing regions using data from 1960-74. Export supply equations are also estimated for the five major exporting regions. These equations are combined with equations which project wheat production to develop a forecasting model of net wheat imports by each region. A market share approach is then used to obtain U.S. wheat exports.
CONSIDERATIONS IN DESIGNING STABILIZATION SCHEMES
Creators: name: Anderson, J.R.
name: Hazell, P.B.R.
name: Scandizzo, P.L.
name: Anderson, J.R.
name: Hazell, P.B.R.
name: Scandizzo, P.L.
Publisher: name: Unknown
Year: 1977
Subjects: Agricultural and Food Policy

description: Stabilization schemes have, in the current national and international debates, come to mean almost exclusively price stabilization schemes. We shall largely share this preoccupation in our paper, but it is worth taking a few paragraphs to consider the rationale of this focus.
Overseas Ventilated Shipping Tests with Florida Oranges and Grapefruit
Creators: name: Hatton, T. T.
name: Winston, J. R.
name: Hatton, T. T.
name: Winston, J. R.
Publisher: name: Unknown
Year: 1958
Subjects: subject: Crop Production/Industries
subject: International Relations/Trade
subject: Marketing
subject: FOS: Economics and business
subject: Research Methods/ Statistical Methods

description: Excerpts from the report: The Florida citrus industry is much interested in the possibility of shipping oranges and grapefruit to Europe in ventilated holds, rather than the more expensive refrigerated holds. Although ventilated shipments of Florida citrus fruits from South Atlantic and Gulf ports are frequently unsuccessful during the winter, an even greater risk exists during the warmer months late in the season. This study was conducted to determine: (1) How late in the season ventilated shipments of citrus fruit, which had been chemically treated to inhibit decay, could successfully be made, taking into consideration the sources of the oranges and grapefruit, and (2) the relative effectiveness of various chemical treatments.
Enumeration of concave integer partitions
Creators: name: Snellman, Jan
name: Paulsen, Michael
Publisher: name: arXiv
Year: 2003
Subjects: subject: Combinatorics (math.CO)
subject: Commutative Algebra (math.AC)
subject: FOS: Mathematics
subject: 05A17; 13B22

description: An integer partition λof n corresponds, via its Ferrers diagram, to an artinian monomial ideal I of colength n in the polynomial ring on two variables. If the partition λcorresponds to an integrally closed ideal we call λconcave. We study generating functions for the number of concave partitions, unrestricted or with at most r parts.
description: 8 pages. ver 2: Added reference to asymptotic estimate by Gert Almkvist. ver 3: Minor editing. ver 4: Added reference to Canfield et al, rewrote section 3 ver 5: Added reference to Andrews
Inflation versus projection sets in aperiodic systems: The role of the window in averaging and diffraction
Creators: name: Baake, Michael
name: Grimm, Uwe
Publisher: name: arXiv
Year: 2020
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Metric Geometry (math.MG)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 52C23, 78A45, 28A80, 37F25, 42B10

description: Tilings based on the cut and project method are key model systems for the description of aperiodic solids. Typically, quantities of interest in crystallography involve averaging over large patches, and are well defined only in the infinite-volume limit. In particular, this is the case for autocorrelation and diffraction measures. For cut and project systems, the averaging can conveniently be transferred to internal space, which means dealing with the corresponding windows. We illustrate this by the example of averaged shelling numbers for the Fibonacci tiling and review the standard approach to the diffraction for this example. Further, we discuss recent developments for inflation-symmetric cut and project structures, which are based on an internal counterpart of the renormalisation cocycle. Finally, we briefly review the notion of hyperuniformity, which has recently gained popularity, and its application to aperiodic structures.
description: Minor adjustments, including slight change of title. 13 pages, many figures. Topical review linked to invited keynote lecture at the 2020 IUCr congress (which has been postponed to 2021)
Asymptotic Quasinormal Frequencies of d-dimensional Schwarzschild Black Holes
Creators: name: Birmingham, Danny
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We determine the quasinormal frequencies for all gravitational perturbations of the d-dimensional Schwarzschild black hole, in the infinite damping limit. Using the potentials for gravitational perturbations derived recently by Ishibashi and Kodama, we show that in all cases the asymptotic real part of the frequency is proportional to the Hawking temperature with a coefficient of log 3. Via the correspondence principle, this leads directly to an equally spaced entropy spectrum. We comment on the possible implications for the spacing of eigenvalues of the Virasoro generator in the associated near-horizon conformal algebra.
description: 8 pages, Latex, v2: Additional references, minor changes
Mixed-beam approach in locally advanced nasopharyngeal carcinoma: IMRT followed by proton therapy boost versus IMRT-only. Evaluation of toxicity and efficacy
Creators: name: Alterio, Daniela
name: D’Ippolito, Emma
name: Vischioni, Barbara
name: Fossati, Piero
name: Gandini, Sara
name: Bonora, Maria
name: Ronchi, Sara
name: Vitolo, Viviana
name: Mastella, Edoardo
name: Magro, Giuseppe
name: Franco, Pierfrancesco
name: Ricardi, Umberto
name: Krengli, Marco
name: Ivaldi, Giovanni
name: Ferrari, Annamaria
name: Giuseppi Fanetti
name: Comi, Stefania
name: Tagliabue, Marta
name: Verri, Elena
name: Ricotti, Rosalinda
name: Ciardo, Delia
name: Jereczek-Fossa, Barbara Alicja
name: Valvo, Francesca
name: Orecchia, Roberto
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Ecology
subject: Cancer
subject: Computational Biology

description: Objective: To compare radiation-induced toxicity and dosimetry parameters in patients with locally advanced nasopharyngeal cancer (LANPC) treated with a mixed-beam (MB) approach (IMRT followed by proton therapy boost) with an historic cohort of patients treated with a full course of IMRT-only. Material and methods: Twenty-seven patients with LANPC treated with the MB approach were compared to a similar cohort of 17 patients treated with IMRT-only. The MB approach consisted in a first phase of IMRT up to 54–60 Gy followed by a second phase delivered with a proton therapy boost up to 70–74 Gy (RBE). The total dose for patients treated with IMRT-only was 69.96 Gy. Induction chemotherapy was administrated to 59 and 88% and concurrent chemoradiotherapy to 88 and 100% of the MB and IMRT-only patients, respectively. The worst toxicity occurring during the entire course of treatment (acute toxicity) and early-late toxicity were registered according to the Common Terminology Criteria Adverse Events V4.03. Results: The two cohorts were comparable. Patients treated with MB received a significantly higher median total dose to target volumes (p = .02). Acute grade 3 mucositis was found in 11 and 76% (p = .0002) of patients treated with MB and IMRT-only approach, respectively, while grade 2 xerostomia was found in 7 and 35% (p = .02) of patients treated with MB and IMRT-only, respectively. There was no statistical difference in late toxicity. Local progression-free survival (PFS) and progression-free survival curves were similar between the two cohorts of patients (p = .17 and p = .40, respectively). Local control rate was 96% and 81% for patients treated with MB approach and IMRT-only, respectively. Conclusions: Sequential MB approach for LANPC patients provides a significantly lower acute toxicity profile compared to full course of IMRT. There were no differences in early-late morbidities and disease-related outcomes (censored at two-years) but a longer follow-up is required to achieve conclusive results.
Geometric features of the mixing of passive scalars at high Schmidt numbers
Creators: name: Schumacher, Joerg
name: Sreenivasan, Katepalli R.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Astrophysics (astro-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The mixing of passive scalars of decreasing diffusivity, advected in each case by the same three-dimensional Navier-Stokes turbulence, is studied. The mixing becomes more isotropic with decreasing diffusivity. The local flow in the vicinity of steepest negative and positive scalar gradients are in general different, and its behavior is studied for various values of the scalar diffusivity. Mixing approaches monofractal properties with diminishing diffusivity. We consider these results in the context of possible singularities of scalar dissipation.
description: 4 pages, 5 Postscript figures
A shape theorem for the orthant model
Creators: name: Holmes, Mark
name: Salisbury, Thomas S.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60K35

description: We study a particular model of a random medium, called the orthant model, in general dimensions $d\ge 2$. Each site $x\in \Z^d$ independently has arrows pointing to its positive neighbours $x+e_i$, $i=1,\dots, d$ with probability $p$ and otherwise to its negative neighbours $x-e_i$, $i=1,\dots, d$ (with probability $1-p$). We prove a shape theorem for the set of sites reachable by following arrows, starting from the origin, when $p$ is large. The argument uses subadditivity, as would be expected from the shape theorems arising in the study of first passage percolation. The main difficulty to overcome is that the primary objects of study are not stationary, which is a key requirement of the subadditive ergodic theorem.
Suppression of 2D superconductivity by the magnetic field: quantum corrections vs superconductor-insulator transition
Creators: name: Gantmakher, V. F.
name: Ermolov, S. N.
name: Tsydynzhapov, G. E.
name: Zhukov, A. A.
name: Baturina, T. I.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Magnetotransport of superconducting Nd_{2-x}Ce_xCuO_{4+y} (NdCeCuO) films is studied in the temperature interval 0.3-30 K. The microscopic theory of the quantum corrections to conductivity, both in the Cooper and in the diffusion channels, qualitatively describes the main features of the experiment including the negative magnetoresistance in the high field limit. Comparison with the model of the field-induced superconductor-insulator transition (SIT) is included and a crossover between these two theoretical approaches is discussed.
description: 5 pages, 4 figures. Submitted to JETP Letters
Machine Learning on sWeighted Data
Creators: name: Borisyak, Maxim
name: Kazeev, Nikita
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: Machine Learning (cs.LG)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Machine Learning (stat.ML)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Data analysis in high energy physics has to deal with data samples produced from different sources. One of the most widely used ways to unfold their contributions is the sPlot technique. It uses the results of a maximum likelihood fit to assign weights to events. Some weights produced by sPlot are by design negative. Negative weights make it difficult to apply machine learning methods. The loss function becomes unbounded. This leads to divergent neural network training. In this paper we propose a mathematically rigorous way to transform the weights obtained by sPlot into class probabilities conditioned on observables, thus enabling to apply any machine learning algorithm out-of-the-box.
description: Submitted to Journal of Physics: Conference Series (ACAT-2019 proceedings)
Adult education and training as corporate social responsibility (CSR) : an exploratory study
Creators: name: Sarkodie, George Adu
Publisher: name: The University of British Columbia
Year: 2018

description: This paper is an inquiry into a relatively untouched perspective in adult education research – Adult Learning and Education as Corporate Social Responsibility (CSR). Two key developments generated the interest for this exploratory study. First, news that made headlines in my home country, Ghana, after the country discovered Oil and Gas in commercial quantities was that several millions of dollars has been spent on what was described as capacity building. In other words, training had been provided to a section of the populace to equip them to work in this new field of extraction business. The second development came when I realized through my ’Foundations of Adult Learning and Education’ (EDST 503) course, that, many adult education activities go unnoticed in society. For me, these two developments had a meeting point - adult education and training programs provided by corporate organizations as part of their corporate social responsibility can sometimes go unnoticed. And this had to be explored. This paper mainly focused on how adult education forms part of the CSR activities of Canadian Mining Corporations. Themes explored in this paper include community development, health and safety, environmental sustainability, corporate-community engagement, and issues of power relations. Considerations for future research was also discussed.
Role of the ferroelastic strain in the optical absorption of BiVO4
Creators: name: Hill, Christina
name: Weber, Mads C.
name: Lehmann, Jannis
name: Leinen, Tariq
name: Fiebig, Manfred
name: Kreisel, Jens
name: Guennou, Mael
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Bismuth vanadate (BiVO4) has recently been under focus for its potential use in photocatalysis thanks to its well-suited absorption edge in the visible light range. Here, we characterize the optical absorption of a BiVO4 single crystal as a function of temperature and polarization direction by reflectance and transmittance spectroscopy. The optical band gap is found to be very sensitive to temperature, and to the monoclinic-to-tetragonal ferroelastic transition at 523K. The anisotropy, as measured by the difference in absorption edge for light polarized parallel and perpendicular to the principal axis, is reduced from 0.2 eV in the high-temperature tetragonal phase to 0.1 eV at ambient temperature. We show that this evolution is dominantly controlled by the ferroelastic shear strain. These findings provide a route for further optimization of bismuth-vanadate-based light absorbers in photocatalytic devices.
description: 6 pages, 5 figures
Adiabatic and entropy perturbations propagation in a bouncing Universe
Creators: name: Peter, Patrick
name: Pinto-Neto, Nelson
name: Gonzalez, Diego A.
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: By studying some bouncing universe models dominated by a specific class of hydrodynamical fluids, we show that the primordial cosmological perturbations may propagate smoothly through a general relativistic bounce. We also find that the purely adiabatic modes, although almost always fruitfully investigated in all other contexts in cosmology, are meaningless in the bounce or null energy condition (NEC) violation cases since the entropy modes can never be neglected in these situations: the adiabatic modes exhibit a fake divergence that is compensated in the total Bardeen gravitational potential by inclusion of the entropy perturbations.
description: 25 pages, no figure, LaTeX
Anomalous Fluctuations in Observations of Q0957+561 A,B: Smoking Gun of a Cosmic String?
Creators: name: Schild, R.
name: Masnyak, I
name: Hnatyk, B.
name: Zhdanov, V.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report the detection of anomalous brightness fluctuations in the multiple image Q0957+561 A,B gravitational lens system, and consider whether such anomalies have a plausible interpretation within the framework of cosmic string theory. We study a simple model of gravitational lensing by an asymmetrical rotating string. An explicit form of the lens equation is obtained and approximate relations for magnification are derived. We show that such a model with typical parameters of the GUT string can quantitatively reproduce the observed pattern of brightness fluctuations. On the other hand, explanation involving a binary star system as an alternative cause requires an unacceptably large massive object at a small distance. We also discuss possible observational manifestations of cosmic strings within our lens model.
description: Published in Astronomy and Astrophysics. 7 pages, 6 figures