cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A REGIONAL ANALYSIS OF AGRICULTURAL PRICE RISK IN SOUTH AFRICA
'n Streeksanalise van landbou prysrisiko in Suid-Afrika
Creators: name: Van Schalkwyk, H. D.
name: Groenewald, J. A.
name: Van Schalkwyk, H. D.
name: Groenewald, J. A.
Publisher: name: Unknown
Year: 1994
Subjects: Agricultural and Food Policy
Demand and Price Analysis
Risk and Uncertainty

description: Regional output/input price differentials and variations were calculated to evaluate price risk in South Africa. It was found that price unstable regions are not necessarily also risky regions as regions with higher output/input price ratios can handle higher price variations better. The average value of the price index for the top ten regions is over 3 times larger than the average for the ten lowest regions. The higher the prices of inputs relative to output prices (the lower the price ratio), the smaller their application to each hectare of land, and the lower the land productivity. The regional prices appears to be a function of the interaction between differential natural and economic factors in different regions.
QED and QCD helicity amplitudes in parton-shower gauge
Creators: name: Hagiwara, Kaoru
name: Kanzaki, Junichi
name: Mawatari, Kentarou
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We introduce photon and gluon propagators in which the scalar polarization component is subtracted systematically by making use of the BRST invariance of the off-shell vector boson created from physical on-shell states. The propagator has the light-cone gauge form, where the spacial component of the gauge vector points along the negative of the off-shell vector boson momentum. We call the gauge as parton-shower gauge, since in collinear configurations the absolute value squared of each Feynman amplitude reproduces all the singular behaviors of the corresponding parton shower in this gauge. We introduce new HELAS codes that can be used to calculate the tree-level helicity amplitudes of arbitrary QED and QCD processes by using MadGraph. The absence of subtle gauge cancellation among Feynman amplitudes allows numerical codes to evaluate singular behaviors accurately, and helps us gaining physical insights on interference patterns.
description: 10 pages, 6 figures; v2: references added; v3: some issues clarified, a reference added, version to appear in EPJC
Cecilia Beaux's Male Portraits : Under Her Female Gaze
Creators: name: Winkler, Micha L.
name: Broude, Norma
Publisher: name: American University (Washington, D.C.)
Year: 2023
Subjects: classificationCode: 3601
subject: Art history, theory and criticism

description: Research paper submitted to American University in partial fulfillment of the Degree of Master of Arts; approved as non-thesis option
Supplementary Material from Geometric constraint of mechanosensing by modification of hydrogel thickness prevents stiffness-induced differentiation in bone marrow stromal cells
Creators: name: Hernandez-Miranda, Maria L
name: Xu, Dichu
name: Ben Issa, Aya A
name: Johnston, David A
name: Browne, Martin
name: Cook, Richard B
name: Sengers, Bram  G
name: Evans, Nicholas
Publisher: name: The Royal Society
Year: 2024
Subjects: classificationCode: 320203
subject: Clinical microbiology

description: Hernandez-Miranda et al_Supplemental Figures 150724.pdf
Fixed points of composite entire and quasiregular maps
Creators: name: Bergweiler, Walter
Publisher: name: arXiv
Year: 2005
Subjects: subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 30D05; 30C65; 30D35

description: We give a new proof of the result that if f and g are transcendental entire functions, then the composite function f(g) has infinitely many fixed points. The method yields a number of generalization of this result. In particular, it extends to quasiregular maps in space.
description: 15 pages
A REVIEW OF THE ENVIRONMENTAL IMPACTS OF AGRICULTURE IN THE DEVELOPING WORLD: LESSONS FOR SOUTH AFRICA
Creators: name: Aihoon, J. K.
name: Kirsten, J. F.
name: Aihoon, J. K.
name: Kirsten, J. F.
Publisher: name: Unknown
Year: 1994
Subjects: Agricultural and Food Policy
International Development

description: This article reviews the existing work on environmental degradation resulting from agricultural practices in the developing world, and presents the empiricalfacts andfigures thereon. This is followed by the identification and analysis of the underlying factors, causes and effects of the agricultural environmental degradation in these regions. The "subsistence effects" which arise from poverty and the changing face of subsistence farming; the 'green revolution effects" which arise from the adoption of green revolution technology, and the "externality effects" which arise from the consumption of common proprty are identified as some of the main underlying factors that determine the environmental impacts of agriculture in developing areas. The above factors, the macrosocial and microsocial factors that determine the adoption of conservation practices, and the short- and long-term implications of government policies in the developing countries are deemed some of the most important considerations for environmental policy analysis and decision-making at national and international levels. Environmental policies directed at the developing regions of South Africa are then suggested, based on the said considerations.
GeV $γ$-ray emission from M33 and Arp~299
Creators: name: Xi, Shao-Qiang
name: Zhang, Hai-Ming
name: Liu, Ruo-Yu
name: Wang, Xiang-Yu
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Star-forming galaxies are huge reservoirs of cosmic rays (CRs) and these CRs convert a significant fraction of their energy into $γ$-rays by colliding with the interstellar medium (ISM). Several nearby star-forming galaxies have been detected in GeV-TeV $γ$-rays. It is also found that the $γ$-ray luminosities in 0.1-100 GeV correlate well with indicators of star formation rates of the galaxies, such as the total infrared (IR) luminosity. In this paper, we report a systematic search for possible $γ$-ray emission from galaxies in the IRAS Revised Bright Galaxies Sample, using 11.4 years of $γ$-ray data taken by the Fermi Large Area Telescope (LAT). Two new galaxies, M33 and Arp 299, are detected significantly. The two galaxies are consistent with the empirical correlation between the $γ$-ray luminosity and total infrared luminosity, suggesting that their $γ$-ray emissions should mainly originate from CRs interacting with ISM. Nevertheless, there is a tentative evidence that the flux of the $γ$-ray emission from Arp~299 is variable. If the variability is true, part of the emission from Arp 299 should originate from the obscured AGN in this interacting galaxy system. In addition, we find that the $γ$-ray excess from M33 is located at the northeast region of the galaxy, where a supergiant H II region, NGC604, resides. This indicates that some bright star-forming regions in spiral galaxies could play a dominant role in the galaxy in producing $γ$-ray emission.
description: 9 pages, 9 figures, 2 tables; ApJ accepted
RESEARCH NOTE: AN INVESTIGATION OF AVOCADO TRADING IN EUROPE
Creators: name: Grote, Ulrike
name: Sartorius Von Bach, Helmke
name: Grote, Ulrike
name: Sartorius Von Bach, Helmke
Publisher: name: Unknown
Year: 1994
Subjects: Crop Production/Industries
International Relations/Trade

description: Increasing world trade opportunities led to a rapid growth of exotic fruit exports to Europe. Their population has shown increased consciousness of health and nutritional values associated with fruits and vegetables. The European market for avocados is mainly supplied by five producing countries, namely Israel, South Africa, Spain, Mexico and Kenya. It has been found that these countries export their avocados to a small number of countries. This regional concentration even increased over time. Most of the avocados designated for Europe go to France. The intra- and inter-industrial trade and trade intensities have been investigated by means of different coefficients. The investigation showes that the consumer education and promotion will play an important role in the future to meet the growing expected supply.
Spectroscopic Determination of Stellar Parameters and Oxygen Abundances for Hyades/Field G-K Dwarfs
Creators: name: Takeda, Yoichi
name: Honda, Satoshi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: It has been occasionally suggested that Fe abundances of K dwarfs derived from Fe I and Fe II lines show considerable discrepancies and oxygen abundances determined from high-excitation O I 7771-5 triplet lines are appreciably overestimated (the problem becoming more serious towards lower Teff), which however has not yet been widely confirmed. With an aim to clarify this issue, we spectroscopically determined the atmospheric parameters of 148 G-K dwarfs (Hyades cluster stars and field stars) by assuming the classical Fe I/Fe II ionization equilibrium as usual, and determined their oxygen abundances by applying the non-LTE spectrum fitting analysis to O I 7771-5 lines. It turned out that the resulting parameters did not show any significant inconsistency with those determined by other methods (for example, the mean differences in Teff and log g from the well-determined solutions of Hyades dwarfs are mostly ~4500K are concerned. We suspect that previously reported strongly Teff-dependent discrepancies may have stemmed mainly from overestimation of weak-line strengths and/or improper Teff scale.
description: Accepted for publication in Astronomical Journal, 38 pages (including 14 figures and 2 tables), with supplementary online material
Extracting the jet azimuthal anisotropy from higher order cumulants
Creators: name: Lokhtin, I. P.
name: Sarycheva, L. I.
name: Snigirev, A. M.
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We analyze the method for calculation of a coefficient of jet azimuthal anisotropy without reconstruction of the nuclear reaction plane considering the higher order correlators between the azimuthal position of jet axis and the angles of particles not incorporated in the jet. The reliability of this technique in the real physical situation under LHC conditions is illustrated.
description: LaTeX, 14 pages including 1 eps-figure
DEMAND ANALYSIS OF ORANGES IN SOUTH AFRICA
Vraaganalise van lemoene in Suid-Afrika
Creators: name: Hayward-Butt, P. R. N.
name: Ortmann, G. F.
name: Hayward-Butt, P. R. N.
name: Ortmann, G. F.
Publisher: name: Unknown
Year: 1994
Subjects: Crop Production/Industries
Demand and Price Analysis

description: This study examines factors influencing the demand for oranges sold on the domestic market. Estimates of own-price, cross-price and income elasticity and flexibility coefficients for oranges are made. The price elasticity of demand for oranges was estimated as -1.55 and the price flexibility of demand as -0.695. The income elasticity (flexibility) was estimated as 0.407 (0.361). Significant cross-effects were present in the models.
RESEARCH NOTE: HUMAN CARBOHYDRATE DEMAND IN SOUTH AFRICA
Die menslike vraag na koolhidrate in Suid-Afrika
Creators: name: Sartorius Von Bach, Helmke
name: Van Zyl, Johan
name: Sartorius Von Bach, Helmke
name: Van Zyl, Johan
Publisher: name: Unknown
Year: 1994
Subjects: Agricultural and Food Policy
Demand and Price Analysis

description: This note discusses aspects of carbohydrate consumption, prices of carbohydrates and interdependence in the carbohydrate market. Knowledge gained is used to analyse the effects of relative prices and income on the consumption of different carbohydrates in South Africa. Price and income elasticities of demand estimated by the traditional single equation approach and a systems method do not differ markedly. However, because of the interdependence between carbohydrate consumption, the systems method seems to be more appropriate than the traditional single equation approach. Relative prices of carbohydrates and income per capita play a major role in influencing the consumption of different carbohydrates.
Smarandache Rings
Creators: name: Kandasamy, WB Vasantha
Publisher: name: arXiv
Year: 2003
Subjects: subject: General Mathematics (math.GM)
subject: FOS: Mathematics
subject: 13-xx, 13Dxx, 16-xx, 17-xx

description: Generally, in any human field, a Smarandache Structure on a set A means a weak structure W on A such that there exists a proper subset B which is embedded with a stronger structure S. By proper subset one understands a set included in A, different from the empty set, from the unit element if any, and from A. These types of structures occur in our everyday's life thats why we study them in this book. Thus, as two particular cases: A Smarandache Ring of level I (S-ring I) is a ring R that contains a proper subset that is a field with respect to the operations induced. A Smarandache Ring of level II (S-ring II) is a ring R that contains a proper subset A that verifies: A is an additive abelian group; A is a semigroup under multiplication, for a, b belonging to A, a . b = 0 if and only if a = 0 or b = 0.
description: 220 pages, 14 figures
Issues of Nationalism and Exile in the Works of Frida Kahlo and Remedios Varo
Creators: name: Winkler, Micha L.
name: Langa, Helen
Publisher: name: American University (Washington, D.C.)
Year: 2023
Subjects: classificationCode: 3601
subject: Art history, theory and criticism

description: Research paper submitted to American University in partial fulfillment of the Degree of Master of Arts; approved as non-thesis option
VIEWPOINT: PROMOTING ENTREPRENEURSHIP IN AGRICULTURE IN THE EASTERN CAPE
Creators: name: Fraser, G. C. G.
name: Antrobus, G. G.
name: Fraser, G. C. G.
name: Antrobus, G. G.
Publisher: name: Unknown
Year: 1994
Subjects: Agricultural and Food Policy
Public Economics

description: Selected cases in developing entrepreneurship in small-scale subsistence and commercial agriculture in the Eastern Cape are examined, including the provision of marketing facilities, the training programme of the Africa Cooperative Action Trust (ACAT) in Ciskei, government sponsored irrigation projects and the farmer support programme. An attempt is made to draw general conclusions about the necessary ingredients for successful entrepreneurship and the formulation of proposals for further promoting entrepreneurship in agriculture in South Africa.
The double torus as a 2D cosmos: groups, geometry and closed geodesics
Creators: name: Kramer, P.
name: Lorente, M.
Publisher: name: arXiv
Year: 2004
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The double torus provides a relativistic model for a closed 2D cosmos with topology of genus 2 and constant negative curvature. Its unfolding into an octagon extends to an octagonal tessellation of its universal covering, the hyperbolic space H^2. The tessellation is analysed with tools from hyperbolic crystallography. Actions on H^2 of groups/subgroups are identified for SU(1, 1), for a hyperbolic Coxeter group acting also on SU(1, 1), and for the homotopy group Φ_2 whose extension is normal in the Coxeter group. Closed geodesics arise from links on H^2 between octagon centres. The direction and length of the shortest closed geodesics is computed.
description: Latex, 27 pages, 5 figures (late submission to arxiv.org)
Moduli Stabilization with the String Higgs Effect
Creators: name: Watson, Scott
Publisher: name: arXiv
Year: 2004
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: We review the notion of the Higgs effect in the context of string theory. We find that by including this effect in time dependent backgrounds, one is led to a natural mechanism for stabilizing moduli at points of enhanced gauge symmetry. We consider this mechanism for the case of the radion (size of the extra dimensions) and find that as decompactification of the large spatial dimensions takes place the radion will remain stabilized at the self dual radius. We discuss how this mechanism can be incorporated into models of string cosmology and brane inflation to resolve some outstanding problems. We also address some issues regarding which string states should be included when constructing low energy actions in string cosmology.
description: 20 pages, references added, typos corrected
Thickness dependence of electronic structure and optical properties of a correlated van der Waals antiferromagnet NiPS$_3$ thin film
Creators: name: Lane, Christopher
name: Zhu, Jian-Xin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We study the thickness dependence of the electronic, magnetic, and optical properties of a NiPS$_3$ thin film, an antiferromagnetic charge-transfer insulator. Utilizing state-of-the-art advanced density functionals, we find the antiferromagnetic Zig-Zag order, the band gap, and the main peaks in the dielectric tensor are all in good agreement with the corresponding experimental values. Upon thinning, the Zig-Zag antiferromagnetic order becomes virtually degenerate with a competing Néel order, consistent with the suppression of long-range order observed by Raman spectroscopy due to strong magnetic fluctuations. Additionally, due to the robustness of the electronic band gap observed by spectroscopic ellipsometry measurements above $T_N$, we suggest that the persistence of the band gap is driven by strong electronic correlations. Other systematic changes in electronic dispersion, effective mass, and Kerr angle with thickness are also discussed. Finally, an applied external electric field is found to suppress the band gap by up to 13%, until precipitating an insulator-metal transition at a critical field value of $0.7$ eV/Å.
description: 9 pages, 7 figures
Systematic Synthesis and Design of Ultra-Low Threshold Parametric Frequency Dividers
Creators: name: Hussein, Hussein M. E.
name: Ibrahim, Mahmoud A. A.
name: Michetti, Giuseppe
name: Rinaldi, Matteo
name: Onabajo, Marvin
name: Cassella, Cristian
Publisher: name: arXiv
Year: 2020
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: A new method is discussed for the systematic synthesis, design and performance optimization of varactor-based parametric frequency dividers (PFDs) exhibiting an ultra-low power threshold ($P_{th}$). For the first time, it is analytically shown that the $P_{th}$-value exhibited by any PFD can always be expressed as an explicit closed-form function of the different impedances forming its network. Such a unique and unexplored property permits to rely on linear models, during the PFD design and performance optimization. The validity of our analytical model has been verified, in a commercial circuit simulator, through time-domain and frequency-domain algorithms. To demonstrate the effectiveness of our new synthesis approach, we also report on a lumped prototype of a 200:100MHz PFD, realized on a printed circuit board (PCB). Although inductors with quality factors lower than 50 were used, the PFD prototype exhibits a $P_{th}$-value lower than $-$15dBm. Such a low $P_{th}$-value is the lowest one ever reported for passive varactor-based PFDs, operating in the same frequency range.
Parent care and the stress process : Findings from panel data
Creators: name: Amirkhanyan, Anna
name: Wolf, Douglas A.
Publisher: name: American University
Year: 2023

description: Objectives. The purpose of this study was to test with panel data an extended model of the stress process recognizing the separate effects of a parent's need for care and an adult child's caring activities. Methods. Using data from the 1996, 1998, and 2000 waves of the Health and Retirement Study, we estimated nonlinear mixed models of mental health outcomes. We assessed mental health for separate samples of 3,350 men and 3,659 women by using an 8-item scale of depressive symptoms. We also explored the sensitivity of results to alternative measures and model specifications. Results. We found that female, but not male, caregivers whose parents needed care exhibited adverse mental health consequences. However, we found that, generally, both male and female noncaregivers whose parents needed care were more likely to report symptoms of depression than were noncaregivers without disabled parents. Additional findings suggest that the stress process is still more complex among married couples. Discussion. This study distinguishes the outcomes of parental care needs from those attributable to caregiving activities. Adverse psychological outcomes appear to be dispersed throughout the family. To focus narrowly on active caregivers is to underestimate the social burdens of disability at older ages.
Covert Surveillance and the Convention
Creators: name: Tierney, Jessica
Publisher: name: figshare
Year: 2020
Subjects: subject: 180114 Human Rights Law
subject: FOS: Law
subject: 220104 Human Rights and Justice Issues
subject: FOS: Philosophy, ethics and religion
subject: Law

description: This paper evaluates the admissibility of evidence obtained through covert surveillance and deceptive policing techniques, under the relevant statutory provisions and recognised rules of evidence, and considers the extent to which such practices are compatible with the European Convention of Human Rights.
Producing delocalized frequency-time Schrödinger cat-like states with HOM interferometry
Creators: name: Fabre, N.
name: Belhassen, J.
name: Minneci, A.
name: Felicetti, S.
name: Keller, A.
name: Amanti, M. I.
name: Baboux, F.
name: Coudreau, T.
name: Ducci, S.
name: Milman, P.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In the late 80's, Ou and Mandel experimentally observed signal beatings by performing a non-time resolved coincidence detection of two photons having interfered in a balanced beam splitter [Phys. Rev. Lett 61, 54 (1988)]. In this work, we provide a new interpretation of the fringe pattern observed in this experiment as the direct measurement of the chronocyclic Wigner distribution of a frequency Schrödinger cat-like state produced by local spectral filtering. Based on this analysis, we also study time-resolved HOM experiment to measure such frequency state.
FARM SIZE EFFICIENCY, FOOD SECURITY AND MARKET ASSISTED RURAL LAND REFORM IN SOUTH AFRICA
Creators: name: Van Zyl, Johan
name: Van Zyl, Johan
Publisher: name: Unknown
Year: 1994
Subjects: subject: Community/Rural/Urban Development
subject: Food Security and Poverty
subject: Marketing
subject: FOS: Economics and business
subject: Production Economics

description: This paper explores the South African experience with respect to farms size efficiency, food security and the South African market for rural land. The evidence suggests that the South African experience is no different from that which is generally observed internationally. The present situation in South African agriculture subsequently provides both an unique and necessary opportunity for advancing a market assisted land reform program. Managing the imminent debt crisis, increasing efficiency, improving food security and addressing some of the racial imbalances in South Africa's farm sector following market liberalization and the withdrawal of other privileges can be facilitated through a market assisted land reform process, rather than through a much more costly, inefficient and inequitable blanket debt relief program. It will also have the added advantages of increasing employment at a low cost and adding to the rural safety-net. In addition, the market assisted process provides a mechanism for efficient and quick land reform without most of the problems and excessive procedures associated with a state or parastatal-led expropriation and redistribution mechanism.
Chandra X-ray observations of Young Clusters I. NGC2264 Data
Creators: name: Ramirez, Solange V.
name: Rebull, Luisa
name: Stauffer, John
name: Hearty, Thomas
name: Hillenbrand, Lynne
name: Jones, Burton
name: Makidon, Russell
name: Pravdo, Steven
name: Strom, Steven
name: Werner, Michael
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present results of a Chandra observation of a field in NGC 2264. The observations were taken with the ACIS-I camera with an exposure time of 48.1 ks. We present a catalog of 263 sources, which includes X-ray luminosity, optical and infrared photometry and X-ray variability information. We found 41 variable sources, 14 of which have a flare-like light curve, and 2 of which have a pattern of a steady increase or decrease over a 10 hour period. The optical and infrared photometry for the stars identified as X-ray sources are consistent with most of these objects being pre-main sequence stars with ages younger than 3 Myr.
description: 36 pages, 13 figures, AJ in press (May 2004)
Parent care and the stress process : Findings from panel data
Creators: name: Amirkhanyan, Anna
name: Wolf, Douglas A.
Publisher: name: Journal of Gerontology
Year: 2023
Subjects: classificationCode: 42
subject: Health sciences
subject: FOS: Health sciences

description: Objectives. The purpose of this study was to test with panel data an extended model of the stress process recognizing the separate effects of a parent's need for care and an adult child's caring activities. Methods. Using data from the 1996, 1998, and 2000 waves of the Health and Retirement Study, we estimated nonlinear mixed models of mental health outcomes. We assessed mental health for separate samples of 3,350 men and 3,659 women by using an 8-item scale of depressive symptoms. We also explored the sensitivity of results to alternative measures and model specifications. Results. We found that female, but not male, caregivers whose parents needed care exhibited adverse mental health consequences. However, we found that, generally, both male and female noncaregivers whose parents needed care were more likely to report symptoms of depression than were noncaregivers without disabled parents. Additional findings suggest that the stress process is still more complex among married couples. Discussion. This study distinguishes the outcomes of parental care needs from those attributable to caregiving activities. Adverse psychological outcomes appear to be dispersed throughout the family. To focus narrowly on active caregivers is to underestimate the social burdens of disability at older ages.
How Powerful is the Evidence in Criminology? On Whether We Should Fear a Coming Crisis of Confidence
Creators: name: J. C. Barnes
name: TenEyck, Michael F.
name: Pratt, Travis C.
name: Cullen, Francis T.
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: A crisis of confidence has struck the behavioral and social sciences. A key factor driving the crisis is the low levels of statistical power in many studies. Low power is problematic because it leads to increased rates of false-negative results, inflated false-discovery rates, and over-estimates of effect sizes. To determine whether these issues impact criminology, we computed estimates of statistical power by drawing 322 mean effect sizes and 271 average sample sizes from 81 meta-analyses. The results indicated criminological studies, on average, have a moderate level of power (mean = 0.605), but there is variability. This variability is observed across general studies as well as those designed to test interventions. Studies using macro-level data tend to have lower power than studies using individual-level data. To avoid a crisis of confidence, criminologists must not ignore statistical power and should be skeptical of large effects found in studies with small samples.
Supplementary materials. from Mosquito sound communication: are male swarms loud enough to attract females?
Creators: name: Feugère, Lionel
name: Gibson, Gabriella
name: Manoukis, Nicholas C.
name: Roux, Olivier
Publisher: name: The Royal Society
Year: 2021
Subjects: subject: Biophysics
subject: Biological Engineering
subject: 110601 Biomechanics
subject: FOS: Health sciences

description: Supplementary methods, supplementary information, supplementary figures, supplementary tables.
Sustainable transportation solutions for UBC Athletics & Recreation
Creators: name: Dreihaar, Adam
name: Hirsche, Kailee
name: Kim, Kyuwon
name: Yuen, Suzanne
Publisher: name: The University of British Columbia
Year: 2014

description: Disclaimer: “UBC SEEDS provides students with the opportunity to share the findings of their studies, as well as their opinions, conclusions and recommendations with the UBC community. The reader should bear in mind that this is a student project/report and is not an official document of UBC. Furthermore readers should bear in mind that these reports may not reflect the current status of activities at UBC. We urge you to contact the research persons mentioned in a report or the SEEDS Coordinator about the current status of the subject matter of a project/report.”
LISA double black holes: Dynamics in gaseous nuclear discs
Creators: name: Dotti, M.
name: Colpi, M.
name: Haardt, F.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study the inspiral of double black holes, with masses in the LISA window of detectability, orbiting inside a massive circum-nuclear disc. Using high-resolution SPH simulations, we follow the black hole dynamics in the early phase when gas-dynamical friction acts on the black holes individually, and continue our simulation until they form a close binary. We find that in the early sinking the black holes lose memory of their initial orbital eccentricity if they co-rotate with the gaseous disc, forming a binary with a low eccentricity, consistent with zero within our numerical resolution limit. The cause of circularization resides in the rotation present in the gaseous background where dynamical friction operates. Circularization may hinder gravitational waves from taking over and leading the binary to coalescence. In the case of counter-rotating orbits the initial eccentricity does not decrease, and the black holes may bind forming an eccentric binary. When dynamical friction has subsided, for equal mass black holes and regardless their initial eccentricity, angular momentum loss, driven by the gravitational torque exerted on the binary by surrounding gas, is nevertheless observable down to the smallest scale probed. In the case of unequal masses, dynamical friction remains efficient down to our resolution limit, and there is no sign of formation of any ellipsoidal gas distribution that may further harden the binary. During inspiral, gravitational capture of gas by the black holes occurs mainly along circular orbits: eccentric orbits imply high relative velocities and weak gravitational focusing. Thus, AGN activity may be excited during the black hole pairing process and double active nuclei may form when circularization is completed, on distance-scales of tens of pcs.
description: Minor changes, accepted to MNRAS (11 pags, 14 figs). Movies (.avi) are available at http://pitto.mib.infn.it/~haardt/MOVIES/
Extent with modification : Leg patterning in the Beetle Tribolium castaneum and the evolution of serial homologs
Creators: name: Angelini, David
name: Smith, Frank W.
name: Jockusch, Elizabeth L.
Publisher: name: American University
Year: 2023

description: Serial homologs are similar structures that develop at different positions within a body plan. These structures share some, but not all, aspects of developmental patterning, and their evolution is thought to be constrained by shared, pleiotropic gene functions. Here we describe the functions of 17 developmental genes during metamorphic development of the legs in the red flour beetle, Tribolium castaneum. This study provides informative comparisons between appendage development in Drosophila melanogaster and T. castaneum, between embryonic and adult development in T. castaneum, and between the development of serially homologous appendages. The leg gap genes Distal-less and dachshund are conserved in function. Notch signaling, the zinc-finger transcription factors related to odd-skipped, and bric-à-brac have conserved functions in promoting joint development. homothorax knockdown alters the identity of proximal leg segments but does not reduce growth. Lim1 is required for intermediate leg development but not distal tarsus and pretarsus development as in D. melanogaster. Development of the tarsus requires decapentaplegic, rotund, spineless, abrupt, and bric-à-brac and the EGF ligand encoded by Keren. Metathoracic legs of T. castaneum have four tarsomeres, whereas other legs have five. Patterns of gene activity in the tarsus suggest that patterning in the middle of the tarsal region, not the proximal- or distal-most areas, is responsible for this difference in segment number. Through comparisons with other recent studies of T. castaneum appendage development, we test hypotheses for the modularity or interdependence of development during evolution of serial homologs.
Intrinsic hole localization mechanism in magnetic semiconductors
Creators: name: Raebiger, H.
name: Ayuela, A.
name: Nieminen, R. M.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The interplay between clustering and exchange coupling in magnetic semiconductors for the prototype (Ga_{1-x},Mn_x)As with manganese concentrations x of 1/16 and 1/32 in the interesting experimental range is investigated. For x ~ 6 %, when all possible arrangements of two atoms within a large supercell are considered, the clustering of Mn atoms at nearest-neighbour Ga sites is energetically preferred. As shown by spin density analysis, this minimum energy configuration localizes further one hole and reduces the effective charge carrier concentration. Also the exchange coupling constant increases to a value corresponding to lower Mn concentrations with decreasing inter Mn distance.
description: Accepted for publication in Journal of Physics: Condensed Matter
ANALYZA SKOLSKEHO MLICENEHO PROGRAMU
THE ANALYSIS OF SCHOOL MILK PROGRAMME
Creators: name: KAPSDORFEROVA, Zuzana
name: UBREZIOVA, Iveta
name: POGRANOVA, Zuzana
name: KAPSDORFEROVA, Zuzana
name: UBREZIOVA, Iveta
name: POGRANOVA, Zuzana
Publisher: name: Unknown
Year: 2011
Subjects: subject: Agricultural and Food Policy
subject: Food Consumption/Nutrition/Food Safety
subject: Livestock Production/Industries
subject: school milk programme
subject: consumption of milk and dairy products
subject: European support
subject: eating habits of children and youth

description: The main objective of the paper is to evaluate the contribution of School Milk Programme (SMP) in the Slovak Republic and find out the reasons of low participation of preschool and school facilities in the Nitra Self-governing Region. Lately, the number of preschool and school facilities involved in the SMP has been increasing. However, reported consumption quantities reached only 30% of the total amount which could have been consumed by children and youth under the program. In the research, four sub-objectives were defined. The first sub-objective identifies changes in SMP legislation and their impact on preschool and school educational facilities. The role of the other sub-objectives is to determine the reasons for the low consumption of milk and dairy products under SMP, to assess the assortment of offered milk and dairy products, issues of communication and organization and to propose measures leading to the elimination of problems and improvement of the current situation.
Data Stewardship Curricula and Career Paths: Bringing EOSC-A Task Force Outcomes to the Austrian RDM Community
Creators: name: Kalová, Tereza
Publisher: name: Zenodo
Year: 2024

description: Slides from presenation given at EOSC Support Austria event, "Bringing EOSC-A Task Force Outcomes to the Austrian RDM Community," held on 7 October 2024.
A phase-field model of frictional shear fracture in geologic materials
Creators: name: Fei, Fan
name: Choo, Jinhyun
Publisher: name: arXiv
Year: 2020
Subjects: subject: Geophysics (physics.geo-ph)
subject: Numerical Analysis (math.NA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Geologic shear fractures such as faults and slip surfaces involve marked friction along the discontinuities as they are subjected to significant confining pressures. This friction plays a critical role in the growth of these shear fractures, as revealed by the fracture mechanics theory of Palmer and Rice decades ago. In this paper, we develop a novel phase-field model of shear fracture in pressure-sensitive geomaterials, honoring the role of friction in the fracture propagation mechanism. Building on a recently proposed phase-field method for frictional interfaces, we formulate a set of governing equations for different contact conditions (or lack thereof) in which frictional energy dissipation emerges in the crack driving force during slip. We then derive the degradation function and the threshold fracture energy of the phase-field model such that the stress-strain behavior is insensitive to the length parameter for phase-field regularization. This derivation procedure extends a methodology used in recent phase-field models of cohesive tensile fracture to shear fracture in frictional materials in which peak and residual strengths coexist and evolve by confining pressure. The resulting phase-field formulation is demonstrably consistent with the theory of Palmer and Rice. Numerical examples showcase that the proposed phase-field model is a physically sound and numerically efficient method for simulating shear fracture processes in geologic materials, such as faulting and slip surface growth.
Extent with modification : Leg patterning in the Beetle Tribolium castaneum and the evolution of serial homologs
Creators: name: Angelini, David
name: Smith, Frank W.
name: Jockusch, Elizabeth L.
Publisher: name: G3: Genes, Genomes, Genetics
Year: 2023
Subjects: classificationCode: 31
subject: Biological sciences
subject: FOS: Biological sciences
classificationCode: 3105
subject: Genetics

description: Serial homologs are similar structures that develop at different positions within a body plan. These structures share some, but not all, aspects of developmental patterning, and their evolution is thought to be constrained by shared, pleiotropic gene functions. Here we describe the functions of 17 developmental genes during metamorphic development of the legs in the red flour beetle, Tribolium castaneum. This study provides informative comparisons between appendage development in Drosophila melanogaster and T. castaneum, between embryonic and adult development in T. castaneum, and between the development of serially homologous appendages. The leg gap genes Distal-less and dachshund are conserved in function. Notch signaling, the zinc-finger transcription factors related to odd-skipped, and bric-à-brac have conserved functions in promoting joint development. homothorax knockdown alters the identity of proximal leg segments but does not reduce growth. Lim1 is required for intermediate leg development but not distal tarsus and pretarsus development as in D. melanogaster. Development of the tarsus requires decapentaplegic, rotund, spineless, abrupt, and bric-à-brac and the EGF ligand encoded by Keren. Metathoracic legs of T. castaneum have four tarsomeres, whereas other legs have five. Patterns of gene activity in the tarsus suggest that patterning in the middle of the tarsal region, not the proximal- or distal-most areas, is responsible for this difference in segment number. Through comparisons with other recent studies of T. castaneum appendage development, we test hypotheses for the modularity or interdependence of development during evolution of serial homologs.
(Super)gravity and Yang-Mills Theories as Generalized Topological Fields with Constraints
Creators: name: Ling, Yi
name: Tung, Roh-Suan
name: Guo, Han-Ying
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 present a general approach to construct a class of generalized topological field theories with constraints by means of generalized differential calculus and its application to connection theory. It turns out that not only the ordinary BF formulations of general relativity and Yang-Mills theories, but also the N=1,2 chiral supergravities can be reformulated as these constrained generalized topological field theories once the free parameters in the Lagrangian are specially chosen. We also show that the Chern-Simons action on the boundary may naturally be induced from the generalized topological action in the bulk, rather than introduced by hand.
description: 24 pages
Sex-specific gene interactions in the patterning of insect genitalia
Creators: name: Aspiras, Ariel C.
name: Smith, Frank W.
name: Angelini, David
Publisher: name: American University
Year: 2023

description: Genitalia play an important role in the life histories of insects, as in other animals. These sexually dimorphic structures evolve rapidly and derive from multiple body segments. Despite the importance of insect genitalia, descriptions of their genetic patterning have been limited to fruit flies. In this study, we report the functions, interactions and regulation of appendage patterning genes (e.g. homothorax, dachshund, and Distal-less) in two insects: the milkweed bug Oncopeltus fasciatus, and the red flour beetle Tribolium castaneum. These species differ in the anatomical complexity of their genitalia. Females of T. castaneum have a terminal ovipositor ending in short styli, while O. fasciatus have a multi-jointed subterminal ovipositor. Male O. fasciatus have a genital capsule consisting of large gonocoxopodites and claspers; T. castaneum males have relatively simple genitalia. The requirement of appendage-patterning genes in males differed between the two species: No defects were observed in T. castaneum male genitalia, and while the male claspers of O. fasciatus were affected by depletion of appendage-patterning genes, the proximal gonocoxopodite was not, suggesting a non-appendicular origin for this structure. Only the styli of the T. castaneum ovipositor were affected by RNAi depletion of appendage-patterning genes (14 genes in all). The posterior Hox genes (abdominal-A and Abdominal-B) were required for proper genital development in O. fasciatus and regulated Distal-less and homothorax similarly in both sexes. Distal-less and dachshund were regulated differently in male and female O. fasciatus. Knockdown of the sex determination gene intersex produced a partial female-to-male transformation of abdominal and genital anatomy and also resulted in abrogation of female-specific regulation of these genes. These results provide developmental genetic support for specific anatomical hypotheses of serial homology. Importantly, these gene functions and interactions describe the developmental patterning of sexually dimorphic structures that have been critical to the diversification of these species-rich insect groups.
Quantum Critical Point in the Spin Glass-Kondo Transition in Heavy Fermion Systems
Creators: name: Theumann, Alba
name: Coqblin, B.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The Kondo-Spin Glass competition is studied in a theoretical model of a Kondo lattice with an intra-site Kondo type exchange interaction treated within the mean field approximation, an inter-site quantum Ising exchange interaction with random couplings among localized spins and an additional transverse field in the x direction, which represents a simple quantum mechanism of spin flipping. We obtain two second order transition lines from the spin-glass state to the paramagnetic one and then to the Kondo state. For a reasonable set of the different parameters, the two second order transition lines do not intersect and end in two distinct QCP.
description: 20 pages; 1 figure; to appear in Physical Review B
Mythos_Anakatalypsis.pdf
Creators: name: Hatzopoulos, Marios
Publisher: name: figshare
Year: 2020
Subjects: History

description: Επιχειρώντας μία κριτική επανεκτίμηση των όρων της διαμόρφωσης της Μεγάλης Ιδέας και της ανάπτυξης της ελληνικής εθνικής ταυτότητας, το άρθρο διερευνά την αλληλεπίδρασή του μύθου της χριστιανικής ανακατάληψης της Κωνσταντινούπολης με τους ιδεολογικούς προσανατολισμούς και τα πολιτικά προτάγματα της νεωτερικότητας στο αρτιγέννητο ελληνικό βασίλειο
Self-similar motions and related relative equilibria in the $N$-point vortex system
Creators: name: Gotoda, Takeshi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We study self-similar solutions of the point-vortex system. The explicit formula for self-similar solutions has been obtained for the three point-vortex problem and for a specific example of the four and five point-vortex problems. We see that the families consisting of these self-similar collapsing solutions are described by one-parameter families, and their collapse time and Hamiltonian are also expressed by functions of the same parameter. Then, the configurations at limit points of the parameter are in relative equilibria. For the many-vortex problem, we investigate the point-vortex system with the help of numerical computations. In particular, considering the case that $N - 1$ point vortices have a uniform vortex strength, we show that families of self-similar collapsing solutions continuously depend on the Hamiltonian and the self-similar solutions asymptotically approach relative equilibria as the Hamiltonian gets close to certain values. In addition, we prove the existence of relative equilibria for the four point-vortex system. We also investigate an example of seven point vortices with non-uniform vortex strengths and give numerical results for it.
description: 22 pages, 10 figures
FOOD QUALITY AND FOOD QUALITY MARKS FROM THE CONSUMERS POINT OF VIEW IN THE CONDITION OF SLOVAKIA AND THE CZECH REPUBLIC
VNIMANIE KVALITY POTRAVIN A ZNACIEK KVALITY SPOTREBITEL'OM V PODMIENKACH SLOVENSKEHO A CESKEHO TRHU
Creators: name: VILHANOVA, Lucia
name: NAGYOVA, L'udmila
name: STAVKOVA, Jana
name: VILHANOVA, Lucia
name: NAGYOVA, L'udmila
name: STAVKOVA, Jana
Publisher: name: Unknown
Year: 2011
Subjects: subject: Agricultural and Food Policy
subject: Food Consumption/Nutrition/Food Safety
subject: food
subject: agricultural commodities
subject: national programme
subject: Food Quality Policy
subject: Quality mark

description: Food quality is the subject of interest in many countries. Slovakia and Czech Republic implemented the national programs promoting domestic agricultural commodities and food in order to increase the quality and safety of domestic products and support their competitiveness on the domestic and foreign markets. Food products in Slovakia and Czech Republic are labeled by the quality marks that represent the quarantee of their high quality, safety and domestic origin. Promotion of these quality products is ensured through various media campaigns and exhibitions that take place in different countries across Europe. The paper focuses on food quality and Food Quality Policy in Slovakia and Czech Republic and consumer's attitudes towards the food quality and products bearing food quality marks in their home country.