cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Green functions and propagation in the Bopp-Podolsky electrodynamics
Creators: name: Lazar, Markus
Publisher: name: arXiv
Year: 2020
Subjects: subject: Classical Physics (physics.class-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: In this paper, we investigate the so-called Bopp-Podolsky electrodynamics. The Bopp-Podolsky electrodynamics is a prototypical gradient field theory with weak nonlocality in space and time. The Bopp-Podolsky electrodynamics is a Lorentz and gauge invariant generalization of the Maxwell electrodynamics. We derive the retarded Green functions, first derivatives of the retarded Green functions, retarded potentials, retarded electromagnetic field strengths, generalized Lienard-Wiechert potentials and the corresponding electromagnetic field strengths in the framework of the Bopp-Podolsky electrodynamics for three, two and one spatial dimensions. We investigate the behaviour of these electromagnetic fields in the neighbourhood of the light cone. In the Bopp-Podolsky electrodynamics, the retarded Green functions and their first derivatives show fast decreasing oscillations inside the forward light cone.
description: 23 pages
Additional file 3 of The natural alkaloid Jerantinine B has activity in acute myeloid leukemia cells through a mechanism involving c-Jun
Creators: name: Hayaa Moeed Alhuthali
name: Bradshaw, Tracey D.
name: Kuan-Hon Lim
name: Toh-Seok Kam
name: Seedhouse, Claire H.
Publisher: name: figshare
Year: 2020
Subjects: subject: Biochemistry
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Pharmacology
subject: 69999 Biological Sciences not elsewhere classified
subject: Cancer
subject: Hematology

description: Additional file 3. Representative image of whole film of western blot. 3: Full image of western blot. A. Full western blot film image for data in Fig. 3a showing upregulation of total and active (S63 phosphorylation) c-Jun following JB treatment. The red boxes indicate where the blot was cropped for Fig. 3a. B. Full length western blot film images for data in Fig. 3c showing elimination of JB-dependent c-Jun activation by either ROS scavenger or JNKI. The red boxes indicate where the blot was cropped for Fig. 3c.
Archäologische Miscellen aus Ägypten I.
Creators: name: Kaufmann, Carl Maria
Publisher: name: Oriens christianus : Hefte für die Kunde des christlichen Orients
Year: 2024

description: Oriens christianus : Hefte für die Kunde des christlichen Orients, Bd. 11 Nr. 1 (1913): Oriens christianus, Band 11, Heft 1
Quantum black holes from null expansion operators
Creators: name: Husain, Viqar
name: Winkler, Oliver
Publisher: name: arXiv
Year: 2004
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Using a recently developed quantization of spherically symmetric gravity coupled to a scalar field, we give a construction of null expansion operators that allow a definition of general, fully dynamical quantum black holes. These operators capture the intuitive idea that classical black holes are defined by the presence of trapped surfaces, that is surfaces from which light cannot escape outward. They thus provide a mechanism for classifying quantum states of the system into those that describe quantum black holes and those that do not. We find that quantum horizons fluctuate, confirming long-held heuristic expectations. We also give explicit examples of quantum black hole states. The work sets a framework for addressing the puzzles of black hole physics in a fully quantized dynamical setting.
description: 5 pages, version to appear in CQG
title: South Sudan: The Fractured State
Creators: name: Young, John
Publisher: name: Max-Planck-Gesellschaft zur Förderung der Wissenschaften
Year: 2021

description: 6.1 Introduction
6.2 Constructing a State in Southern Sudan
6.3 The US and South Sudan Independence
6.4 International Peacemaking and the Creation of South Sudan
6.5 South Sudanese State: Divided Against Itself
6.6 Count-Down to War
6.7 Conclusion
6.8 Addendum, December 30, 2020
Footnotes
Astrometric precision of observations at VLT/FORS2
Creators: name: Lazorenko, Petro F.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In this paper we test the astrometric precision of VLT/FORS2 observations using a serie of CCD frames taken in Galactic bulge area. A special reduction method based on symmetrization of reference fields was used to reduce the atmospheric image motion. Positional precision of unsaturated R=16 mag star images at 17 sec exposure and 0.55 arcsec seeing was found to be equal to 300 microarcsec. The total error of observations was decomposed into components. It was shown that astrometric error depends largely on the photon centroiding error of the target (250 microarcsec for 16 mag stars) while the image motion is much less (110 microarcsec). At galactic latitudes to about 20 degrees, precision for a serie of frames with a 10 min total exposure is estimated to be 30-50 microarcsec for 14-16 mag stars providing the images are not overexposed and the filter R "special" is used. Error estimates for fields with smaller sky star density are given. We conclude that astrometric observations with large telescopes, under optimal reduction, are never atmospheric limited. The bias caused by differential chromatic refraction and residual chromatism of LADC is considered and expressions valid for correcting color effects in the measured positions are given.
description: 10 pages, 6 figures, accepted for publication in A&A
Additional file 1 of Predicting developmental dysplasia of the hip in at-risk newborns
Creators: name: Roposch, Andreas
name: Protopapa, Evangelia
name: Malaga-Shaw, Olivia
name: Gelfer, Yael
name: Humphries, Paul
name: Ridout, Deborah
name: Wedge, John H.
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Developmental Biology
subject: Cancer

description: Additional file 1. Flowchart showing the development of the risk prediction model. We considered to include “breech presentation” in the model – despite it was not significant in univariate analysis – and tested the effect of breech in a model adjusted for mode of delivery. This effect was not significant (OR=1.10, p = 0.76) and we omitted breech from further analysis.
THE EFFECTS OF OVER-DISTRACTION ON ADJACENT SEGMENT DISEASE AND CAGE SUBSIDENCE IN ANTERIOR CERVICAL DISCECTOMY AND FUSION
Creators: name: Azimov, Ulugbek
Publisher: name: Zenodo
Year: 2024

description: Over-distraction has been identified as a risk factor for cage subsidence and postoperative neck pain following anterior cervical discectomy and fusion (ACDF). Biomechanical studies have also shown increased intradiscal pressure at adjacent segments after ACDF. This study aims to investigate whether over-distraction of the index disc affects adjacent segment pathology. A retrospective review was conducted on 145 patients who underwent primary ACDF for cervical degenerative conditions between January 2016 and December 2023. Patients were categorized into two groups: (1) Over-distraction group (postoperative–preoperative index disc height difference ≥ 2 mm), and (2) No-distraction group (postoperative–preoperative index disc height difference < 2 mm). Outcome measures included radiographic parameters, Japanese Orthopaedic Association (JOA) score, and the incidences of cage subsidence, as well as radiological and clinical adjacent segment pathologies (RASP and CASP), which were assessed preoperatively, postoperatively, and at final follow-up.
Additional file 1 of The natural alkaloid Jerantinine B has activity in acute myeloid leukemia cells through a mechanism involving c-Jun
Creators: name: Hayaa Moeed Alhuthali
name: Bradshaw, Tracey D.
name: Kuan-Hon Lim
name: Toh-Seok Kam
name: Seedhouse, Claire H.
Publisher: name: figshare
Year: 2020
Subjects: subject: Biochemistry
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Pharmacology
subject: 69999 Biological Sciences not elsewhere classified
subject: Cancer
subject: Hematology

description: Additional file 1. Cell cycle analysis following JB treatment. A. Summary histogram illustrating the proportion of cells in each phase of the cell cycle after 4 and 6 h treatment with IC50 dose of JB. B. example of flow cytometric DNA (7-AAD) content histograms (6 h-JB-treated cells). C. Cell cycle analysis after 24 h exposure to JB.D. example of flow cytometric analysis at 24 h showing reduction in BrdU-positive (dividing) cells following JB treatment. Columns, mean of three independent experiments; bars, SD. * P
Lattice calculation of the lowest-order hadronic contribution to the muon anomalous magnetic momen
Creators: name: Blum, T.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: I present quenched domain wall fermion and 2+1 flavor improved Kogut-Susskind fermion calculations of the hadronic vacuum polarization which are used to calculate the ${\cal O}(α^2)$ hadronic contribution to the anomalous magnetic moment of the muon. Together with previous quenched calcuations, the new results confirm that in the quenched theory the hadronic contribution is signifcantly smaller ($\sim 30%$) than the value obtained from the total cross section of $e^+e^-$ annhilation to hadrons. The 2+1 flavor results show an increasing contribution to $g-2$ as the quark mass is reduced.
description: 3 pages. Contribution to the proceedings of Lattice 2004 (Fermilab)
Measuring Returns to Research Expenditures for Corn, Wheat and Soybeans
Creators: name: Sundquist, W. Burt
name: Cheng, Cheng-Ge
name: Norton, George W.
name: Sundquist, W. Burt
name: Cheng, Cheng-Ge
name: Norton, George W.
Publisher: name: Unknown
Year: 1981
Subjects: Crop Production/Industries
Research and Development/Tech Change/Emerging Technologies

description: A wealth of information exists on ex post returns to research investments for agriculture in the aggregate and for several agricultural commodity groups of commercial importance in the United States. Many of the investments made in agricultural research and, consequently, many of the allocative decisions on research funding, are, however, commodity-specific. Probably the main reason for the limited empirical literature on returns to commodity-specific research is that of the limited production input data available for individual commodities. Data from the U.S. Census of Agriculture, for example, do not permit commodity disaggregation beyond that employed by Bredahl and Peterson. Their analysis which utilizes commodity groups including cash crops, dairy, livestock, and poultry, has been updated by Norton using 1974 Census data. The research reported in this paper represents "early stage" progress in an effort to extend the cross-sectional production function-type analyses of Bredahl, Peterson, and Norton to three specific crops--corn, wheat, and soybeans. The production functions estimated are for the 1977 crop year.
Lyman continuum leakage in faint star-forming galaxies at redshift z=3-3.5 probed by gamma-ray bursts
Creators: name: Vielfaure, J. -B.
name: Vergani, S. D.
name: Japelj, J.
name: Fynbo, J. P. U.
name: Gronke, M.
name: Heintz, K. E.
name: Malesani, D. B.
name: Petitjean, P.
name: Tanvir, N. R.
name: D'Elia, V.
name: Kann, D. A.
name: Palmerio, J. T.
name: Salvaterra, R.
name: Wiersema, K.
name: Arabsalmani, M.
name: Campana, S.
name: Covino, S.
name: De Pasquale, M.
name: Postigo, A. de Ugarte
name: Hammer, F.
name: Hartmann, D. H.
name: Jakobsson, P.
name: Kouveliotou, C.
name: Laskar, T.
name: Levan, A. J.
name: Rossi, A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present the observations of Lyman continuum (LyC) emission in the afterglow spectra of GRB 191004B at $z=3.5055$, together with those of the other two previously known LyC-emitting long gamma-ray bursts (LGRB) (GRB 050908 at $z=3.3467$, and GRB 060607A at $z=3.0749$), to determine their LyC escape fraction and compare their properties. From the afterglow spectrum of GRB 191004B we determine a neutral hydrogen column density at the LGRB redshift of $\log(N_{\rm HI}/cm^{-2})= 17.2 \pm 0.15$, and negligible extinction ($A_{\rm V}=0.03 \pm 0.02$ mag). The only metal absorption lines detected are CIV and SiIV. In contrast to GRB 050908 and GRB 060607A, the host galaxy of GRB 191004B displays significant Ly$α$ emission. From its Ly$α$ emission and the non-detection of Balmer emission lines we constrain its star-formation rate (SFR) to $1 \leq$ SFR $\leq 4.7$ M$_{\odot}\ yr^{-1}$. We fit the Ly$α$ emission with a shell model and find parameters values consistent with the observed ones. The absolute LyC escape fractions we find for GRB 191004B, GRB 050908 and GRB 060607A are of $0.35^{+0.10}_{-0.11}$, $0.08^{+0.05}_{-0.04}$ and $0.20^{+0.05}_{-0.05}$, respectively. We compare the LyC escape fraction of LGRBs to the values of other LyC emitters found from the literature, showing that LGRB afterglows can be powerful tools to study LyC escape for faint high-redshift star-forming galaxies. Indeed we could push LyC leakage studies to much higher absolute magnitudes. The host galaxies of the three LGRB presented here have all $M_{\rm 1600} > -19.5$ mag, with the GRB 060607A host at $M_{\rm 1600} > -16$ mag. LGRB hosts may therefore be particularly suitable for exploring the ionizing escape fraction in galaxies that are too faint or distant for conventional techniques. Furthermore the time investment is very small compared to galaxy studies. [Abridged]
description: 12 pages, 9 figures. Abridged abstract. Final version published in A&A
Additional file 2 of The natural alkaloid Jerantinine B has activity in acute myeloid leukemia cells through a mechanism involving c-Jun
Creators: name: Hayaa Moeed Alhuthali
name: Bradshaw, Tracey D.
name: Kuan-Hon Lim
name: Toh-Seok Kam
name: Seedhouse, Claire H.
Publisher: name: figshare
Year: 2020
Subjects: subject: Biochemistry
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Pharmacology
subject: 69999 Biological Sciences not elsewhere classified
subject: Cancer
subject: Hematology

description: Additional file 2. Phospho-kinase measurements following 4 h JB treatment. Pixel densities in A. MV4–11 and B. HL-60 JB-treated cells. Black and grey bars are untreated and treated samples respectively. C. shows the whole film image.
Impurity Quantum Phase Transitions
Creators: name: Vojta, Matthias
Publisher: name: arXiv
Year: 2004
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We review recent work on continuous quantum phase transitions in impurity models, both with fermionic and bosonic baths - these transitions are interesting realizations of boundary critical phenomena at zero temperature. The models with fermion bath are generalizations of the standard Kondo model, with the common feature that Kondo screening of the localized spin can be suppressed due to competing processes. The models with boson bath are related to the spin-boson model of dissipative two-level systems, where the interplay between tunneling and friction results in multiple phases. The competition inherent to all models can generate unstable fixed points associated with quantum phase transitions, where the impurity properties undergo qualitative changes. Interestingly, certain impurity transitions feature both lower-critical and upper-critical "dimensions" and allow for epsilon-type expansions. We present results for a number of observables, obtained by both analytical and numerical renormalization group techniques, and make connections to experiments.
description: 22 pages, 11 figs, review article to be published in Phil. Mag
B meson mixing at CDF II
Creators: name: Rescigno, Marco
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We present the first limit on Bs mixing frequency obtained using 360 pb^-1 of Tevatron Run II data with the CDF II detector. We derive Delta ms 7.9 ps^-1 @ 95 % C.L. with a sensitivity of 8.4 ps^-1. -
description: 5 pages conference proceeding of Beauty 05, Assisi (Perugia), Italy June 20-24, 2005
Some Economic Considerations in Storing Seed Cotton at Gins
Creators: name: Ross, John E.
name: Ross, John E.
Publisher: name: Unknown
Year: 1955
Subjects: Crop Production/Industries
Production Economics
Research and Development/Tech Change/Emerging Technologies

description: Excerpts from the report: The principal objectives of this study were to: (1) appraise the different cost factors involved in storing seed cotton and ascertain the storage costs under different methods; (2) indicate the practicability of seed cotton storage by different methods; and (3) determine under commercial conditions the effects of seed cotton storage on the quality and value of ginned lint. Three gins in the San Joaquin Valley of California and two gins in the Yazoo-Mississippi Delta, entailing different types of storage facilities, were included in this study.
Observables sensitive to absolute neutrino masses: Constraints and correlations from world neutrino data
Creators: name: Fogli, G. L.
name: Lisi, E.
name: Marrone, A.
name: Melchiorri, A.
name: Palazzo, A.
name: Serra, P.
name: Silk, J.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In the context of three-flavor neutrino mixing, we present a thorough study of the phenomenological constraints applicable to three observables sensitive to absolute neutrino masses: The effective neutrino mass in Tritium beta decay (m_beta); the effective Majorana neutrino mass in neutrinoless double beta decay (m_2beta); and the sum of neutrino masses in cosmology (Sigma). We discuss the correlations among these variables which arise from the combination of all the available neutrino oscillation data, in both normal and inverse neutrino mass hierarchy. We set upper limits on m_beta by combining updated results from the Mainz and Troitsk experiments. We also consider the latest results on m_2beta from the Heidelberg-Moscow experiment, both with and without the lower bound claimed by such experiment. We derive upper limits on Sigma from an updated combination of data from the Wilkinson Microwave Anisotropy Probe (WMAP) satellite and the 2 degrees Fields (2dF) Galaxy Redshifts Survey, with and without Lyman-alpha forest data from the Sloan Digital Sky Survey (SDSS), in models with a non-zero running of the spectral index of primordial inflationary perturbations. The results are discussed in terms of two-dimensional projections of the globally allowed region in the (m_beta,m_2beta,Sigma) parameter space, which neatly show the relative impact of each data set. In particular, the (in)compatibility between Sigma and m_2beta constraints is highlighted for various combinations of data. We also briefly discuss how future neutrino data (both oscillatory and non-oscillatory) can further probe the currently allowed regions.
description: 17 pages (RevTeX) + 7 figures (PostScript). Minor changes in text; references added; results unchanged. To appear in PRD
Top quark pair production in the exclusive processes at LHC
Creators: name: Goncalves, Victor P.
name: Martins, Daniel E.
name: Rangel, Murilo S.
name: Tasevsky, Marek
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We analyze the LHC prospects for measurements of the $t\bar{t}$ pair produced exclusively in photon-photon or semi-exclusively in photon-Pomeron and Pomeron-Pomeron processes using protons tagged in forward proton detectors on both sides of the interaction point. These processes are interesting from the point of view of a possible measurement of the top quark mass and constraining models used in Beyond Standard Model physics. Focusing on the semi-leptonic channel, $t\bar{t}\rightarrow jjblν_l\bar{b}$, making use of the exclusive nature of the final state, together with the use of timing information provided by forward proton detectors, relevant exclusive and inclusive backgrounds are studied in detail for different luminosity (or pile-up) scenarios and found to be important for further considerations. While good prospects are found for observing the signal, the top quark mass measurement turns out not to be competitive with measurements in inclusive channels.
description: 17 pages, 5 figures, modifications reflecting the journal review output
L'Octoëchos Syrien
Creators: name: Jeannin, Jules
name: Puyade, J.
Publisher: name: Oriens christianus : Hefte für die Kunde des christlichen Orients
Year: 2024

description: Oriens christianus : Hefte für die Kunde des christlichen Orients, Bd. 11 Nr. 1 (1913): Oriens christianus, Band 11, Heft 1
Technology Selection and Appropriate Technology
Creators: name: Englander, A. Steven
name: Englander, A. Steven
Publisher: name: Unknown
Year: 1981
Subjects: Research and Development/Tech Change/Emerging Technologies

description: This paper provides a formal model of technology choice by a single region. Case studies have indicated that the technology acquired by LDCs often seem unsuitable, although the criteria for suitability are often unclear. The reasons which are presented for inappropriateness of the selection often rely more on political arguments then economic ones, or treat the recipient country as a passive actor in the whole process. Can a technology actively selected by a recipient country ever by inappropriate, assuming factor cost ratios represent true relative values? A model presented by Evenson and Bingswanger (1978) indicates that a technology developed in one economic or physical environment may be 'appropriate' to a second, very different environment if the second environment can generate a very limited range of technological possibilities on its own. Ranis (1978) has emphasized the importance of information on technological alternatives flowing smoothly and accurately within the system and the need to acquire capacity for adaptive research. Both these approaches recognize the importance of indigenous research capacity, although Ranis accords more emphasis to friction and proper incentives within the system. Barring policy and management problems, their conclusions appear to be that technology choice will be efficient--the appearance of inappropriateness stems from the lack of explicit recognition of the constraints on technology generation in the system. The model presented below builds on the early models of rational technology selection of Evenson- Binswanger and Ranis. It shares common elements with the Evenson-Binswanger model and may be regarded as a generalization of their model. It goes further, however, in several crucial aspects. It allows the extent of both adaptive and independent research to be choice variables in the technology acquisition decision. It allows for selection out of a continuum of technologies which differ in the environments for which they were designed. It allows for limits to the extent to which technologies can be adapted across environments and allows for losses because of incomplete adaption. The public goodnature of research plays a critical role in determining the efficiency of resource allocation as well. The model presented immediately below is couched in terms relating to agricultural technology. A reason for first presenting a model of agricultural technology selection is that many of the conceptual issues possess more intuitive natural interpretations. A second section will consider the impact of market structure on the development of technology, and a third section will broaden the basic model of agricultural technology development to one which encompasses certain types of fixed capital investment. A fourth section discusses testing of the model.
title: Borderlands and Transborder Processes in the Blue Nile Region
Creators: name: Schlee, Günther
Publisher: name: Max-Planck-Gesellschaft zur Förderung der Wissenschaften
Year: 2021

description: 5.1 The “Nation”-State: Questions of Identity and Cohesion
5.2 The Borderlands along the Blue Nile and the Sobat and the “Third Sudan”
5.3 War, Politics, and the Disruption of Nomadic Movements
5.4 The Militarization of Agriculture and Migration to Europe
5.5 Identity Issues: Who Is the State and for Whom Does It Exist?
5.6 Conclusion
Footnotes
Type I error rates for multi-group confirmatory maximum likelihood factor analysis with ordinal and mixed item format data : a methodology for construct comparability
Creators: name: Koh, Kim Hong
Publisher: name: University of British Columbia
Year: 2009

description: Construct comparability studies are of importance in the context of test validation for psychological and educational measures. The most commonly used scale-level methodology for evaluating construct comparability is the Multi-Group Confirmatory Factor Analysis (MGCFA). More specifically, the use of normal-theory Maximum Likelihood (ML) estimation method and Pearson covariance matrix in MGCFA has become increasingly common in day-to-day research given that the estimation methods for ordinal variables require large sample sizes and are limited to 20-25 items. The thesis investigated the statistical properties of the ML estimation method and Pearson covariance matrix in two commonly found contexts, measures with ordinal response formats (binary and Likert-type items) and measures with mixed item formats (wherein some of the items are binary and the remainder are of ordered polytomous items). Two simulation studies were conducted to reflect data typically found in psychological measures and educational achievement tests, respectively. The results of Study 1 show that the number of scale points does not inflate the empirical Type I error rates of the ML chi-square difference test when the ordinal variables approximate a normal distribution. Rather, increasing skewness lead to the inflation of the empirical Type I error rates. In Study 2, the results indicate that mixed item formats and sample size combinations have no effect on the inflation of the empirical Type I error rates when the item response distributions are, again, approximately normal. Implications of the findings and future studies were discussed and recommendations provided for applied researchers.
NS5-branes on an ellipsis and novel marginal deformations with parafermions
Creators: name: Petropoulos, P. Marios
name: Sfetsos, Konstadinos
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider NS5-branes distributed along the circumference of an ellipsis and explicitly construct the corresponding gravitational background. This provides a continuous line of deformations between the limiting cases, considered before, in which the ellipsis degenerates into a circle or into a bar. We show that a slight deformation of the background corresponding to a circle distribution into an ellipsoidal one is described by a novel non-factorizable marginal perturbation of bilinears of dressed parafermions. The latter are naturally defined for the circle case since, as it was shown in the past, the background corresponds to an orbifold of the exact conformal field theory coset model SU(2)/U(1) times SL(2,R)/U(1). We explore the possibility to define parafermionic objects at generic points of the ellipsoidal families of backgrounds away from the circle point. We also discuss a new limiting case in which the ellipsis degenerates into two infinitely stretched parallel bars and show that the background is related to the Eguchi-Hanson metric, via T-duality.
description: 24 pages
Additional file 2 of Medical termination for pregnancy in early first trimester (≤ 63 days) using combination of mifepristone and misoprostol or misoprostol alone: a systematic review
Creators: name: Abubeker, Ferid A.
name: Lavelanet, Antonella
name: Rodriguez, Maria I.
name: Kim, Caron
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Pharmacology
subject: Biotechnology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Cancer
subject: Science Policy

description: Additional file 2. Risk of bias.
title: Bolshevism and National Federalism in Ethiopia
Creators: name: Young, John
Publisher: name: Max-Planck-Gesellschaft zur Förderung der Wissenschaften
Year: 2021

description: 3.1 Introduction
3.2 Bolshevism and the Nation-State
3.3 Ethiopia: Ideologies Under Assault
3.4 Establishing a Nation-Based Federalism
3.5 Comparisons and Analyses
3.6 Conclusion
Footnotes
HYPERTENSIVE HEART DISEASE: RISK FACTORS, COMPLICATIONS, AND UNDERLYING MECHANISMS
Creators: name: Norboyeva, Sevara
Publisher: name: Zenodo
Year: 2024

description: Hypertensive heart disease encompasses both functional and structural dysfunctions in the left ventricle, left atrium, and coronary arteries, resulting from chronic uncontrolled hypertension. Despite its prevalence, hypertensive heart disease is often underreported, and the mechanisms contributing to its development and associated complications remain inadequately defined. In this review, we provide a comprehensive overview of the current understanding of hypertensive heart disease, focusing on the mechanisms involved in its progression and complications, particularly left ventricular hypertrophy, atrial fibrillation, heart failure, and coronary artery disease. Additionally, we highlight the roles of dietary salt, immune responses, and genetic predisposition in the pathogenesis of hypertensive heart disease.
Multipolar Origin of the Unexpected Transverse Force Resulting from Two-Wave Interference
Creators: name: Achouri, Karim
name: Kiselev, Andrei
name: Martin, Olivier J. F.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We propose a theoretical study on the electromagnetic forces resulting from the superposition of a TE and TM plane waves interacting with a sphere. Specifically, we first show that, under such an illumination condition, the sphere is subjected to a force transverse to the propagation direction of the waves. We then analyze the physical origin of this counter-intuitive behavior using a multipolar decomposition of the electromagnetic modes involved in that scattering process. This analysis reveals that interference effects, due to the two-wave illumination, lead to a Kerker-like asymmetric scattering behavior resulting in this peculiar transverse force.
Evaluating Marketing Channel Options for Small-Scale Fruit and Vegetable Producers: Case Study Evidence from Central New York
Creators: name: LeRoux, Matthew N.
name: Schmit, Todd M.
name: Roth, Monika
name: Streeter, Deborah H.
name: LeRoux, Matthew N.
name: Schmit, Todd M.
name: Roth, Monika
name: Streeter, Deborah H.
Publisher: name: Unknown
Year: 2009
Subjects: subject: Agribusiness
subject: Crop Production/Industries
subject: Financial Economics
subject: Marketing channel
subject: small-scale
subject: fruit and vegetable producers
subject: case study

description: An investigation of the relative costs and benefits of marketing channels used by typical small-scale diversified vegetable crop producers is conducted. Using case study evidence from four small farms in Central New York, this study compares the performance of wholesale and direct marketing channels, including how the factors of risk, owner and paid labor, price, lifestyle preferences, and sales volume interact to impact optimal market channel selection. Given the highly perishable nature of the crops grown, along with the risks and potential sales volume of particular channels, a combination of different marketing channels is needed to maximize overall firm performance. Accordingly, a ranking system is developed to summarize the major firm-specific factors across channels and to prioritize those channels with the greatest opportunity for success based on individual firm preferences.
Neutron Electric Dipole Moment with Domain Wall Quarks
Creators: name: Berruto, F.
name: Blum, T.
name: Orginos, K.
name: Soni, A.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We present preliminary results for nucleon dipole moments computed with domain wall fermions. Our main target is the electric dipole moment of the neutron arising from the theta term in the gauge part of the QCD lagrangian. The calculated magnetic dipole moments of the proton and neutron are in rough accord with experimental values.
description: 3 pages. Contribution to the proceedings of Lattice 2004 (Fermilab)
The Productivity and Allocation of Research: U.S. Agricultural Experiment Stations, Revisited
Creators: name: Norton, George W.
name: Norton, George W.
Publisher: name: Unknown
Year: 1981
Subjects: Research and Development/Tech Change/Emerging Technologies

description: Estimates of marginal products and rates of return to cash grains, dairy, poultry, and other livestock research in the United States were made by Bredahl and Peterson using 1969 Census of Agriculture data. Their results showed national returns to crop and livestock research to be in the 36 to 46% range. These estimates of returns, several times higher than market rates, have proven useful to agricultural researchers and administrators in supporting budget requests. Bredahl and Peterson provided marginal products by commodity groups by states which have been used by economists in particular states to calculate rates of return to research on commodity groups in those states (Mitchell, Coffey, Babb, and Pratt). More recently, Davis has provided evidence that the production coefficient on the research variable in aggregate agricultural production functions has declined since the 1950s but remained stable for the past 10-15 years. Stability in the aggregate, however, does not necessarily imply stability over time across commodity groups or states. Stability of the research coefficient is an important issue since estimates from studies such as Bredahl and Peterson's are used in making projections of returns to future research spending. Instability over time would indicate that one should not make projections which make use of research coefficients from only one cross-section. The main focus of this paper, therefore, is to provide additional evidence on the efficiency of allocation of research resources among commodity groups and regions within the United States. Data from the 1969 and 1974 Censuses of Agriculture are employed in aggregate agricultural commodity group production functions to test if the research coefficient for any or all of these groups has remained stable from 1969 to 1974. A second purpose of the study is to examine the effects on the research coefficients of certain variables not tested in the Bredahl and Peterson study. Variables are included to account for research spillover, weather differences, and land quality differences across states. Alternative research lags are tested and the importance of the assumed research lag on the rates of return is also illustrated. The question of research spillover is an important one and has recently received increased attention in the literature (Evenson, White and Havlicek, Davis, Garren and White). It is really the lag in spillover or the incomplete spillover of research results from one state to another that allows one to pick up any variance with a state level research variable in a cross-sectional production function. The spillover that occurs, if unaccounted for, will likely bias the state marginal products derived from commodity group production functions.
The Economic Impact of Investment in Integrated Pest Management
Creators: name: Araji, A.A.
name: Araji, A.A.
Publisher: name: Unknown
Year: 1981
Subjects: Crop Production/Industries
Research and Development/Tech Change/Emerging Technologies

description: Following World War II, pest control largely shifted from a biological discipline to a chemical one. Unilateral dependence on pesticides has also resulted in concentrating effort on developing high-yield crop varieties with disregard for loss of characters for tolerance or resistance to pests. The broad ecological dictum of considering the whole interacting system was generally ignored and, thus, the importance of natural enemies and the plant's own factor for resisting pests. Excessive reliance on pesticides for the last three decades has destroyed natural enemies and caused some pests to develop resistance to pesticides. Consequently, the use of frequent treatments with increasing dosages was adopted in an effort to control pests. This development, however, increased production costs of many crops without alleviating the problem (Huffaker and Smith). The rise of energy and pesticide costs combined with growing ecological and social concern about excessive pesticide use have encouraged scientific and public attention to initiate coordinated research on agricultural pests that consider the biological, cultural, and ecological aspects of controlling pests. The United States International Biological Program (IBP) initiated in 1971 with the cooperation of the National Science Foundation, the Environmental Protection Agency, and the U.S. Department of Agriculture, and 18 land-grant universities has set the foundation for the development and implementation of coordinated pest control programs which are more efficient and less harmful to public health and the environment. Direct techniques and methods of control utilized in integrated pest management (IPM) include : crop plant resistance, biological control, cultural control, pesticide use, attractants and repellants, and growth regulation. In addition to the direct pest control methods, collecting the necessary information by monitoring or sampling the pest population and its principal natural enemies at appropriate times of the year is required for effective management decisions. Through monitoring and short-term weather prediction it was possible in 1976 to reduce insecticide treatments of cotton from 10 to two applications per year (Huffaker and Smith). In general, IPM uses the best combination of all known control techniques and concentrates on the plants themselves rather than the pests.
Time-Focusing Time-of-Flight, a new method to turn a MAC-E-filter into a quasi-differential spectrometer
Creators: name: Fulst, Alexander
name: Lokhov, Alexey
name: Fedkevych, Mariia
name: Steinbrink, Nicholas
name: Weinheimer, Christian
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Spectrometers based on the magnetic adiabatic collimation followed by an electrostatic filter (MAC-E-filter) principle combine high angular acceptance with an excellent energy resolution. These features make MAC-E-filters very valuable for experiments where the kinetic energy of ions or electrons from rare processes has to be measured with utmost sensitivity and precision. Examples are direct neutrino mass experiments like KATRIN which investigate the energy of electrons in the endpoint region of the tritium $β$-spectrum. However, the MAC-E-filter is a very sharp energy high-pass filter but not a differential spectrometer. To determine a spectral shape of a charged particle source, different electric retarding potentials have to be used sequentially, reducing the statistics. In a previous work we have shown that the advantages of the standard MAC-E-filter can be combined with a measurement of the time-of-flight (TOF), allowing to determine spectral information over a certain energy range with one retarding potential only, with the corresponding gain in statistics. This TOF method requires to know the start time of the charged particles, which is not always possible. Therefore, we propose a new method which does not require the determination of the start time and which we call "time-focusing Time-of-Flight" (tfTOF): By applying a time dependent acceleration and deceleration potential at a subsequent MAC-E-filter, an energy dependent post-bunching of the charged particles is achieved.
description: 11 pages, 9 figures, final version published in EPJC
Excitation of large-scale inertial waves in a rotating inhomogeneous turbulence
Creators: name: Elperin, T.
name: Golubev, I.
name: Kleeorin, N.
name: Rogachevskii, I.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: A mechanism of excitation of the large-scale inertial waves in a rotating inhomogeneous turbulence due to an excitation of a large-scale instability is found. This instability is caused by a combined effect of the inhomogeneity of the turbulence and the uniform mean rotation. The source of the large-scale instability is the energy of the small-scale turbulence. We determined the range of parameters at which the large-scale instability occurs, the growth rate of the instability and the frequency of the generated large-scale inertial waves. Geophysical and astrophysical applications of the obtained results are discussed.
description: 11 pages, 6 figures, REVTEX4, revised version, submitted to Phys. Rev. E
Google calendar: instructivo
Creators: name: Vazano, Irene Noé
name: Black, Melissa
name: Nanton, María Cristina
name: Buede, Julián
name: López, Sabrina
name: Loto, Patricia
Publisher: name: Zenodo
Year: 2024
Subjects: Ciencia Abierta
Comunidad
Teaching
Latin America
Enseñanza
Clases virtuales
Pedagogía
Programación
Docencia
Cursos

description: Instructivo basado en la experiencia de MetaDocencia para las organizaciones que necesiten utilizar la plataforma Google Calendar para cumplir sus objetivos.
Risks Perceptions and Willingness-to-Pay for Organic Fresh Chicken in Argentina
Creators: name: Lacaze, Maria Victoria
name: Rodriguez, Elsa M.
name: Lupin, Beatriz
name: Lacaze, Maria Victoria
name: Rodriguez, Elsa M.
name: Lupin, Beatriz
Publisher: name: Unknown
Year: 2009
Subjects: subject: Consumer/Household Economics
subject: Food Consumption/Nutrition/Food Safety
subject: Risks perceptions
subject: Hormone-free chicken
subject: Willingness-to-pay

description: In developed countries, a series of food scares and the overuse of antibiotics in animals have increased consumers´ concerns about chicken meat quality since the last decades. In Argentina, consumers are clearly becoming oriented to alternative chicken varieties they conceive as “healthier”, “tastier” and “free of harmful chemical substances”. This paper aims to calculate Argentinean consumers’ willingness-to-pay (WTP) for organic fresh chicken in the domestic market by applying the Contingent Valuation approach and with a view to providing some useful insights to promote organic chicken production and consumption. A binomial logit model was estimated with data from a consumer survey conducted in Buenos Aires City, Argentina. Willingness-to-pay is explained by the consumption of organic products, health risks perceptions, production processes and regulation concerns and labels reading. WTP calculation reveals a mean value of 21.4%/kg and a median of 19%/kg. Even though both measures are below than the average price premium prevailing at the sampled stores (24.6%/kg), they are indicating that organic chicken is positively valued. In fact, it is provided with the nutritional and product origin information that consumers require and considered for them as a safer option than conventional chicken.
description: Contributed Paper prepared for presentation at the International Association of Agricultural Economists Conference, Beijing, China, August 16-22, 2009
Additional file 1 of Medical termination for pregnancy in early first trimester (≤ 63 days) using combination of mifepristone and misoprostol or misoprostol alone: a systematic review
Creators: name: Abubeker, Ferid A.
name: Lavelanet, Antonella
name: Rodriguez, Maria I.
name: Kim, Caron
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Pharmacology
subject: Biotechnology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Cancer
subject: Science Policy

description: Additional file 1. Search strategies from electronic databases.
Kaon decays shedding light on massless dark photons
Creators: name: Su, Jhih-Ying
name: Tandean, Jusak
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We explore kaon decays with missing energy carried away by a massless dark photon, $\barγ$, assumed to have flavor-changing dipole-type couplings to the $d$ and $s$ quarks. We consider in particular the neutral-kaon modes $K_L\toγ\barγ$ and $K_L\toπ^0γ\barγ$ and their $K_S$ counterparts, as well as the charged-kaon channel $K^+\toπ^+γ\barγ$, each of which also has an ordinary photon, $γ$, in the final state. In addition, we look at $K_{L,S}\toπ^+π^-\barγ$ and $K^+\toπ^+π^0\barγ$. Interestingly, the same $ds\barγ$ interactions give rise to the flavor-changing two-body decays of hyperons with missing energy and are subject to model-independent constraints that can be inferred from the existing hyperon data. Taking this into account, we obtain branching fractions ${\cal B}(K_L\toγ\barγ)$ and ${\cal B}(K_L\toπ^0γ\barγ)$ which can be as high as $10^{-3}$ and $10^{-6}$, respectively, one or both of which may be within the sensitivity reach of the KOTO experiment. Furthermore, we find that ${\cal B}(K^+\toπ^+γ\barγ)$ and ${\cal B}(K^+\toπ^+π^0\barγ)$ are allowed to be maximally of order $10^{-6}$ as well, which may be probed by NA62. Complementarily, the hyperon modes can have rates which are potentially accessible by BESIII. Thus, these ongoing experiments could soon be able to offer significant tests on the existence of the massless dark photon.
description: 11 pages, no figure, slightly revised, references added, matches publication
Casimir energy-momentum tensor for the Robin Surfaces in de Sitter Spacetime
Creators: name: Setare, M R
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The energy-momentum tensor for a massless conformally coupled scalar field in de Sitter spacetime in the presence of a couple curved branes is investigated. We assume that the scalar field satisfies the Robin boundary condition on the surfaces. Static de Sitter space is conformally related to the Rindler space, as a result we can obtain vacuum expectation values of energy-momentum tensor for conformally invariant field in static de Sitter space from the corresponding Rindler counterpart by the conformal transformation.
description: 8 pages, no figure
Ein Brief des Elias bar Šinaja über die Wahl des Katholikos Išo'jahb IV
Creators: name: Vandenhoff, Bernhard
Publisher: name: Oriens christianus : Hefte für die Kunde des christlichen Orients
Year: 2024

description: Oriens christianus : Hefte für die Kunde des christlichen Orients, Bd. 11 Nr. 1 (1913): Oriens christianus, Band 11, Heft 1
title: Introduction
Creators: name: Markakis, John
name: Schlee, Günther
name: Young, John
Publisher: name: Max-Planck-Gesellschaft zur Förderung der Wissenschaften
Year: 2021

description: 1.1 Contextual Overview
1.2 Nation and State in Africa
1.3 Where to Go from Here
Footnotes