cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Governance of the bioeconomy: A global comparative study of national bioeconomy strategies
Creators: name: Dietz, Thomas
name: Börner, Jan
name: Förster, Jan Janosch
name: Von Braun, Joachim
name: Dietz, Thomas
name: Börner, Jan
name: Förster, Jan Janosch
name: Von Braun, Joachim
Publisher: name: Unknown
Year: 2018
Subjects: subject: Environmental Economics and Policy
subject: Public Economics
subject: Research and Development/Tech Change/Emerging Technologies
subject: Resource /Energy Economics and Policy
subject: Bioeconomy
subject: Governance
subject: Development Policy
subject: Innovation
subject: Technology
subject: Bio-based

description: More than forty states worldwide currently pursue explicit political strategies to expand and promote their bioeconomies. This paper assesses these strategies in the context of the global Sustainable Development Goals (SDGs). Our theoretical framework differentiates between four pathways of bioeconomic developments. The extent, to which bioeconomic developments along these pathways lead to increased sustainability, depends on the creation of effective governance mechanisms. We distinguish between enabling governance and constraining governance as the two fundamental political challenges in setting up an effective governance framework for a sustainable bioeconomy. Further, we lay out a taxonomy of political support measures (enabling governance) and regulatory tools (constraining governance) that states can use to confront these two political challenges. Guided by this theoretical framework, we conduct a qualitative content analysis of 41 national bioeconomy strategies to provide systematic answers to the question of how well designed the individual national bioeconomy strategies are to ensure the rise of a sustainable bioeconomy.
Molecular scale height in spiral galaxies
Creators: name: Patra, Narendra Nath
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Having to have low thermal energy, the molecular gas in galaxies is expected to settle in a thin disc near the midplane. However, contradicting this understanding, recent studies have revealed considerably thick molecular discs in nearby spiral galaxies. To understand this apparent discrepancy, we theoretically model the molecular discs in a sample of eight nearby spiral galaxies and estimate their molecular scale heights (Half Width at Half Maxima (HWHM)). We assume that the baryonic discs are in vertical hydrostatic equilibrium under their mutual gravity in the external force field of the dark matter halo. We set up the joint Poisson's-Boltzman equation of hydrostatic equilibrium and numerically solve it to obtain the three-dimensional molecular gas distribution and determine the scale heights in our sample galaxies. We find that the scale heights follow a universal exponential law with a scale length of $0.46 \pm 0.01 \ r_{25}$. The molecular scale heights in our sample galaxies are found to vary between 50-200 pc depending on the galaxy and radius. Using the density solutions, we build dynamical models of the molecular discs and produce molecular column density maps. These model maps found to match to the observed ones reasonably well. We further incline the dynamical models to an inclination of 90$^o$ to estimate the expected observed thickness of the molecular discs. Interestingly it is found that at edge-on orientation, our sample galaxies under hydrostatic assumption can easily produce a few kpc thick observable molecular disc.
description: Published in MNRAS
Burning down the house: the cost of wildfires in heavily urbanized areas
Creators: name: Tanner, S.
name: Tanner, S.
Publisher: name: Unknown
Year: 2018
Subjects: Agricultural and Food Policy
Community/Rural/Urban Development

description: The frequency and severity of wildfires in the United States has increased dramatically over the past few decades, with both climatic conditions and development into wildland areas fueling this trend. We explore how high-intensity wildfires impact communities living in areas of significant wildland fire risk near national forests in Southern California. The study area contains several megacities that are directly adjacent to four of the most heavily trafficked national forests. Home prices in communities near the forests are valued for their scenery, abundant recreational opportunities, and respite from the cities. Directly after a wildfire, disamenities such as a less attractive view, loss of recreation sites, and increased perception of risk should be capitalized into home prices. We contribute to the literature on wildfire impacts by estimating the impact of a recent fire on property sales prices along two dimensions: properties close to the wildfire compared with properties farther away, and properties in designated areas of high fire risk. Our findings suggest significant heterogeneous impacts of wildfire depending on whether the property is located on highrisk land, as well as evidence that proximity to a national forest can alter the risk perceptions of potential home buyers.
Olivier Canteaut (dir.), Le discret langage du pouvoir. Les mentions de chancellerie du Moyen Âge au XVIIe siècle, Paris (École nationale des chartes) 2019
Creators: name: Tock, Benoît-Michel
Publisher: name: Francia-Recensio
Year: 2021

description: Olivier Canteaut (dir.), Le discret langage du pouvoir. Les mentions de chancellerie du Moyen Âge au XVIIe siècle, Paris (École nationale des chartes) 2019, 709 p. (Études et rencontres de l’École des chartes, 55), ISBN 978-2-35723-150-4, EUR 56,00.
description: Francia-Recensio, 2021/1
Speaking Stata: Species of origin
Creators: name: Cox, Nicholas J.
name: Cox, Nicholas J.
Publisher: name: Unknown
Year: 2015
Subjects: subject: Research Methods/ Statistical Methods
subject: calendar
subject: noncalendar year
subject: graphics
subject: origin
subject: translation
subject: rotation
subject: logit regression
subject: Poisson regression

description: Counting and measurement scales often have natural origins that deserve respect in analysis. In other problems, we should feel free to shift or translate the origin or to rotate a periodic scale. Examples with environmental data focus on trends in time and seasonal cycles. Several small tips are bundled together on working with noncalendar years in Stata.
A magnetocaloric study on the series of 3d-metal chromites ACr$_{2}$O$_{4}$ where A = Mn, Fe, Co, Ni, Cu and Zn
Creators: name: Ali, Anzar
name: Singh, Yogesh
Publisher: name: arXiv
Year: 2019
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The 3d-metal chromites ACr$_2$O$_4$ where A is a magnetic ion, show the paramagnetic to ferrimagnetic phase transition at T$_C$ while for non-magnetic A-site ion, ACr$_2$O$_4$ show paramagnetic to antiferromagnetic phase transition at T$_N$. In this report, we present the detailed study of magnetic and the magnetocaloric effect (MCE) of the 3d-metal chromites ACr$_{2}$O$_{4}$ (where A = Mn, Fe, Co, Ni, Cu, and Zn) near T$_C$ and T$_N$. We find the magnitude of MCE (-$Δ$S$_M$) decreases on decreasing the magnetic moment of A-site ion with an exception for CuCr$_{2}$O$_{4} $. Additionally, to know more about the order and nature of phase transition, we have made a scaling analysis of (-$Δ$S$_{M}$) for all the chromites across the phase transition temperatures T$_C$ and T$_N$.
description: 12 pages, 6 figures, 3 tables
Gaëlle Calvet-Marcadé, Assassin des pauvres. L’Église et l’inaliénabilité des terres à l’époque carolingienne, Turnhout (Brepols) 2018
Creators: name: Waagmeester, Bastiaan
Publisher: name: Francia-Recensio
Year: 2021

description: Gaëlle Calvet-Marcadé, Assassin des pauvres. L’Église et l’inaliénabilité des terres à l’époque carolingienne, Turnhout (Brepols) 2018, 358 p., 2 ill. en n/b (Haut Moyen Âge, 30), ISBN 978-2-503--57793-7, EUR 80,00.
description: Francia-Recensio, 2021/1
Enno Bünz, Markus Cottin (Hg.), Bischof Thilo von Trotha (1466–1514). Merseburg und seine Nachbarbistümer im Kontext des ausgehenden Mittelalters, Leipzig (Leipziger Universitätsverlag) 2020
Creators: name: Flemmig, Stephan
Publisher: name: Francia-Recensio
Year: 2021

description: Enno Bünz, Markus Cottin (Hg.), Bischof Thilo von Trotha (1466–1514). Merseburg und seine Nachbarbistümer im Kontext des ausgehenden Mittelalters, Leipzig (Leipziger Universitätsverlag) 2020, 570 S., 85 Abb. (Schriften zur sächsischen Geschichte und Volkskunde, 64), ISBN 978-3-96023-349-7, EUR 80,00.
description: Francia-Recensio, 2021/1
Laurey Braguier, Servantes de Dieu. Les »beatas« de la couronne de Castille (1450–1600). Préface d’Isabelle Poutrin, Rennes (Presses universitaires de Rennes) 2019
Creators: name: Böhringer, Letha
Publisher: name: Francia-Recensio
Year: 2021

description: Laurey Braguier, Servantes de Dieu. Les »beatas« de la couronne de Castille (1450–1600). Préface d’Isabelle Poutrin, Rennes (Presses universitaires de Rennes) 2019, 512 p., nombr. ill., graph., cartes, fac-sim. (Histoire), ISBN 978-2-7535-7685-8, EUR 30,00.
description: Francia-Recensio, 2021/1
title: Vector Signal Processors in Data Compression and Image Processing
Creators: name: King, G
Publisher: name: The Open University
Year: 1990

description: The objective is to evaluate the applicability of the Vector Signal Processor to real time signal processing for data compression or manipulation. Particular emphasis has been placed on its role as a co-processor and the contribution that it might be expected to make during joint activities with the host. These activities would have the combination used as the embedded computing subsystem of a FAX machine or as an image processing unit in desk top publishing. In these cases the hypothesis is that the Vector Signal Processor would act as an accelerator for many computationally intensive applicable processes. After a review of current data compression techniques and of specialised architectures which may also be appropriate it is concluded that the Vector Signal Processor is the best option available. The operational details are then discussed. In order to be able to approximately compare experimental results with other workers a benchmarking exercise is undertaken. Following this is the core of the study which details schemes for data compression of data sources involving character symbols, line drawings, and grey scale pictures. This involves pattern matching and substitution,Transform coding and quadtrees. New encoding procedures are suggested based on Morse code for the secondary encoding of symbols and on Delta modulation for quadtrees. Image entity manipulation is discussed followed by some speculative work on neural networks and error control coding. It is concluded that some processes are well served by the Vector Signal Processor but that the lack of conditional decision making and the difficulty of performing certain arithmetic functions make the processor unwieldy in its necessary host interactions.
Gabriele Bartz, Markus Gneiß (Hg.), Illuminierte Urkunden/Illuminated Charters. Beiträge aus Diplomatik, Kunstgeschichte und Digital Humanities/Essays from Diplomatic, Art History and Digital Humanities. Wiener Tagung »Illuminierte Urkunden. Von den Rände
Creators: name: Tock, Benoît-Michel
Publisher: name: Francia-Recensio
Year: 2021

description: Gabriele Bartz, Markus Gneiß (Hg.), Illuminierte Urkunden/Illuminated Charters. Beiträge aus Diplomatik, Kunstgeschichte und Digital Humanities/Essays from Diplomatic, Art History and Digital Humanities. Wiener Tagung »Illuminierte Urkunden. Von den Rändern zweier Disziplinen ins Herz der Digital Humanities«, Köln, Weimar, Wien (Böhlau) 2019, 544 S., zahlr. farb. Abb. (Archiv für Diplomatik, Schriftgeschichte, Siegel- und Wappenkunde. Beiheft, 16), ISBN 978-3-412-51108-1, EUR 70,00.
description: Francia-Recensio, 2021/1
Newborn Be star systems observed shortly after mass transfer
Creators: name: Rivinius, Th.
name: Klement, R.
name: Chojnowski, S. D.
name: Baade, D.
name: Abdul-Masih, M.
name: Przybilla, N.
name: Flo, J. Guarro
name: Heathcote, B.
name: Hadrava, P.
name: Gies, D.
name: Shepard, K.
name: Buil, C.
name: Garde, O.
name: Thizy, O.
name: Monnier, J. D.
name: Anugu, N.
name: Lanthermann, C.
name: Schaefer, G.
name: Davies, C.
name: Kraus, S.
name: Ennis, J.
name: Setterholm, B. R.
name: Gardner, T.
name: Ibrahim, N.
name: Chhabra, S.
name: Gutierrez, M.
name: Codron, I.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Many classical Be stars acquire their very rapid rotation by mass and angular-momentum transfer in massive binaries. Short-lived intermediate-phase objects have only been discovered recently. Data archives and the literature have been searched for additional candidates exhibiting this patterns. Thirteen candidates were identified at various confidence levels. Adding to the two known systems identified as classical Be star+pre-subdwarf binaries (LB-1 and HR6819), two more (V742Cas, HD44637) could be confirmed with interferometry, with V742Cas setting a new record for the smallest visually observed angular semi-major axis, at a=0.663mas. Two further ones (V447Sct, V1362Cyg) are not resolved interferometrically, but other evidence puts them at the same confidence level as LB-1. V2174Cyg is a candidate with very high confidence, but was not observed interferometrically. The remaining ones are either candidates with varying levels of confidence. Of a mostly magnitude complete sample of 328 Be stars, 0.5-1% are found to have recently completed the mass overflow that led to their formation. Another 5% are systems with compact subdwarf companions, i.e., further evolved after a previous overflow, and possibly two more percent harbor white dwarfs. All these systems are of early B-subtypes, however, and if the original sample is restricted to early subtypes (136 objects), these percentages increase by a factor of about 2.5, while dropping to zero for the mid and late subtypes (together 204 objects). This strongly suggests that early- vs. mid- and late-type Be stars have differently weighted channels to acquire their rapid rotation, namely binary interaction vs. evolutionary spin-up.
description: Accepted for publication by A&A
Christelle Balouzat-Loubet (ed./dir.), Digitizing Medieval Sources/L’édition en ligne de documents d’archives médiévaux. Challenges and Methodologies/Enjeux, méthodologie et défis, Turnhout (Brepols) 2019
Creators: name: Tock, Benoît-Michel
Publisher: name: Francia-Recensio
Year: 2021

description: Christelle Balouzat-Loubet (ed./dir.), Digitizing Medieval Sources/L’édition en ligne de documents d’archives médiévaux. Challenges and Methodologies/Enjeux, méthodologie et défis, Turnhout (Brepols) 2019, 182 p., 21 fig. (ARTEM. Atelier de recherche sur les textes médiévaux, 27), ISBN 978-2-503-58413-3, EUR 69,00.
description: Francia-Recensio, 2021/1
Solitary wave and other solutions for nonlinear heat equations
Creators: name: Nikitin, Anatoly G.
name: Barannyk, Tetyana A.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Mathematical Physics (math-ph)
subject: Analysis of PDEs (math.AP)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 35K57; 35Q51; 58J70

description: New exact solutions for the heat equation with a polynomial non-linearity and for the Fisher equation are found. An extended class of non-linear heat equations admitting solitary wave solutions is found. The generalization of the Fisher equation is proposed whose solutions propagate with arbitrary ad hoc fixed velocity.
description: 18 pages, LaTeX2e
Current distribution in a two dimensional electron gas exposed to a perpendicular nonhomogeneous magnetic field of a chess configuration
Creators: name: Badalyan, S. M.
name: Peeters, F. M.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We have studied a finite two-dimensional electron system exposed to a normal nonhomogeneous magnetic field of a chess configuration. Using the conformal mapping method we obtain an exact analytical solution for the electric field distribution in terms of the Jacobi functions. The obtained formula is exploited to calculate the physical quantities of interest: the current density distribution, the linear density of charges accumulated along the magnetic interfaces, the magneto-resistance, and the Hall resistance.
description: poster
Christelle Balouzat-Loubet, Louis X, Philippe V, Charles IV. Les derniers Capétiens, Paris (Passés composés/Humensis) 2019
Creators: name: Fiene, Willem
Publisher: name: Francia-Recensio
Year: 2021

description: Christelle Balouzat-Loubet, Louis X, Philippe V, Charles IV. Les derniers Capétiens, Paris (Passés composés/Humensis) 2019, 208 p., 4 p. de pl., cartes, tabl. généal., ISBN 978-2-3793-3161-9, EUR 19,00.
description: Francia-Recensio, 2021/1
Ethical Considerations of Information Professionals
Creators: name: Froehlich, Thomas J.
Publisher: name: Cadernos BAD
Year: 1996

description: Comunicação a presentada pelo professor Thomas Froehlich, d a Kent Sta te Universit y, ao I Encontro Internacional de É tica na Tnformação realizado em Lisboa a 27 d e Junho d e 1995.
description: Cadernos BAD, N.º 1 (1996)
X-raying winds in distant quasars: the first high-redshift wind duty cycle
Creators: name: Bertola, E.
name: Dadina, M.
name: Cappi, M.
name: Vignali, C.
name: Chartas, G.
name: De Marco, B.
name: Lanzuisi, G.
name: Giustini, M.
name: Torresi, E.
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: Theoretical models of wind-driven feedback from Active Galactic Nuclei (AGN) often identify Ultra-fast outflows (UFOs) as being the main cause for generating galaxy-size outflows, possibly the main actors in establishing the so-called AGN-galaxy co-evolution. UFOs are well characterized in local AGN but much less is known in quasars at the cosmic time when SF and AGN activity peaked ($z\simeq1-3$). It is therefore mandatory to search for evidences of UFOs in high-$z$ sources to test the wind-driven AGN feedback models. Here we present a study of Q2237+030, the Einstein Cross, a quadruply-imaged radio-quiet lensed quasar located at $z=1.695$. We performed a systematic and comprehensive temporally and spatially resolved X-ray spectral analysis of all the available Chandra and XMM-Newton data (as of September 2019). We find clear evidence for spectral variability, possibly due to absorption column density (or covering fraction) variability intrinsic to the source. We detect, for the first time in this quasar, a fast X-ray wind outflowing at $v_{\rm out}\simeq0.1c$ that would be powerful enough ($\dot{E}_{\rm kin}\simeq0.1 L_{\rm bol}$) to significantly affect the host galaxy evolution. We report also on the possible presence of an even faster component of the wind ($v_{\rm out}\sim0.5c$). Given the large sample and long time interval spanned by the analyzed X-ray data, we are able to roughly estimate, for the first time in a high-$z$ quasar, the wind duty cycle as $\approx0.46\,(0.31)$ at $90\%\,(95\%)$ confidence level. Finally, we also confirm the presence of a Fe K$α$ emission line with variable energy, which we discuss in the light of microlensing effects as well as considering our findings on the source.
description: 18 pages, 11 figures, 7 tables, Accepted for publication in A&A
Angle Dependent Magnetoresistance of the Layered Organic Superconductor κ-(ET)2Cu(NCS)2: Simulation and Experiment
Creators: name: Goddard, P. A.
name: Blundell, S. J.
name: Singleton, J.
name: McDonald, R. D.
name: Ardavan, A.
name: Narduzzo, A.
name: Schlueter, J. A.
name: Kini, A. M.
name: Sasaki, T.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The angle-dependences of the magnetoresistance of two different isotopic substitutions (deuterated and undeuterated) of the layered organic superconductor κ-(ET)2Cu(NCS)2 are presented. The angle dependent magnetoresistance oscillations (AMRO) arising from the quasi-one-dimensional (Q1D) and quasi-two-dimensional (Q2D) Fermi surfaces in this material are often confused. By using the Boltzman transport equation extensive simulations of the AMRO are made that reveal the subtle differences between the different species of oscillation. No significant differences are observed in the electronic parameters derived from quantum oscillations and AMRO for the two isotopic substitutions. The interlayer transfer integrals are determined for both isotopic substitutions and a slight difference is observed which may account for the negative isotope effect previously reported [1]. The success of the semi-classical simulations suggests that non-Fermi liquid effects are not required to explain the interlayer-transport in this system.
description: 15 pages, 16 figures
Michel Aaij, Shannon Godlove (ed.), A Companion to Boniface, Leiden, Boston (Brill Academic Publishers) 2020
Creators: name: Breternitz, Patrick
Publisher: name: Francia-Recensio
Year: 2021

description: Michel Aaij, Shannon Godlove (ed.), A Companion to Boniface, Leiden, Boston (Brill Academic Publishers) 2020, XVIII–562 p. (Brill’s Companions to the Christian Tradition, 92), ISBN 978-90-04-33851-7, EUR 239,00.
description: Francia-Recensio, 2021/1
Coherent states associated to the wavefunctions and the spectrum of the isotonic oscillator
Creators: name: Thirulogasanthar, K.
name: Saad, Nasser
Publisher: name: arXiv
Year: 2004
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 81R30

description: Classes of coherent states are presented by replacing the labeling parameter $z$ of Klauder-Perelomov type coherent states by confluent hypergeometric functions with specific parameters. Temporally stable coherent states for the isotonic oscillator Hamiltonian are presented and these states are identified as a particular case of the so-called Mittag-Leffler coherent states.
description: 12 pages
Strict quantizations of almost Poisson manifolds
Creators: name: Li, Hanfeng
Publisher: name: arXiv
Year: 2003
Subjects: subject: Quantum Algebra (math.QA)
subject: Operator Algebras (math.OA)
subject: FOS: Mathematics

description: We show the existence of (non-Hermitian) strict quantization for every almost Poisson manifold.
description: 15 pages
MOCKA -- A PLATO mock asteroseismic catalogue: Simulations for gravity-mode oscillators
Creators: name: Jannsen, N.
name: Tkachenko, A.
name: Royer, P.
name: De Ridder, J.
name: Seynaeve, D.
name: Aerts, C.
name: Aigrain, S.
name: Plachy, E.
name: Bodi, A.
name: Uzundag, M.
name: Bowman, D. M.
name: Fritzewski, D. J.
name: IJspeert, L. W.
name: Li, G.
name: Pedersen, M. G.
name: Vanrespaille, M.
name: Van Reeth, T.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: With ESA's PLATO space mission set for launch in December 2026, a new photometric legacy and a future of new scientific discoveries await. In this work we investigate PLATO's potential for observing pulsating stars across the Hertzsprung-Russell diagram as part of the PLATO Complimentary Science program (PLATO-CS). Specifically, a PLATO mock asteroseismic catalogue (MOCKA) of intermediate to massive stars is presented as a benchmark to highlight the asteroseismic yield of PLATO-CS in a quantitative way. MOCKA includes simulations of $β$~Cephei, slowly pulsating B (SPB), $δ$~Scuti, $γ$~Doradus, RR Lyrae, Cepheid, hot subdwarf, and white dwarf stars. In particular, main-sequence gravity (g) mode pulsators are of interest as some of these stars form an important foundation for the scientific calibration of PLATO. MOCKA is based on a magnitude limited ($G\lesssim17$) \textit{Gaia} catalogue and is a product of realistic end-to-end \texttt{PlatoSim} simulations of stars for the first PLATO pointing field in the Southern hemisphere, which will be observed for a minimally 2-yr duration. We show that an abundant spectrum of frequencies is achievable across a wide range of magnitudes and co-pointing PLATO cameras. Within the magnitude limited regimes simulated ($G \lesssim 14$ for $γ$~Doradus stars and $G \lesssim 16$ for SPB stars) the dominant g-mode frequency is recovered in more than $95\%$ of the cases. MOCKA help us to understand the limits of the PLATO mission as well as highlight the opportunities to push astrophysics beyond current stellar models. All data products of this paper are made available to the community for further exploration. The key data products of MOCKA are the magnitude limited \textit{Gaia} catalogue of the first PLATO pointing field, together with fully reduced light curves from multi-camera observations for each pulsation class.
Modified gravity with negative and positive powers of the curvature: unification of the inflation and of the cosmic acceleration
Creators: name: Nojiri, Shin'ichi
name: Odintsov, Sergei D.
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The modified gravity, which eliminates the need for dark energy and which seems to be stable, is considered. The terms with positive powers of the curvature support the inflationary epoch while the terms with negative powers of the curvature serve as effective dark energy, supporting current cosmic acceleration. The equivalent scalar-tensor gravity may be compatible with the simplest solar system experiments.
description: 23 pages, 3 figures, discussion is extended, references added, version to appear in PRD
Consumer preferences and willingness to pay for Aflatoxin- Free Milk in Pakistan
Creators: name: Abedullah, A.
name: Kouser, S.
name: Ibrahim, M.
name: Abedullah, A.
name: Kouser, S.
name: Ibrahim, M.
Publisher: name: Unknown
Year: 2018
Subjects: subject: Agricultural and Food Policy
subject: International Development
subject: Livestock Production/Industries
subject: Aflatoxin
subject: Choice Experiment
subject: Pakistan

description: Aflatoxins are highly toxic compounds in milk and pose serious risks to human health. Past studies have observed high concentration of aflatoxin in raw milk of Pakistan. Nonetheless, this study contributes by investigating consumers’ demand for aflatoxin-free raw milk. For this purpose, we conducted a discrete choice experiment with a random sample of 360 households drawn from three mega cities of Punjab province. Random parameter logit and latent class models are used to incorporate preference heterogeneity in the stated choice analysis. Empirical findings suggest that consumers want to pay a highest premium for milk having low concentration of aflatoxin. Based on these findings, we suggest that there is considerable scope for the rapid development of aflatoxin-free raw milk, even though it is marketed at prices that are significantly higher than current milk prices.
Is prohibiting child labour enough? Coffee certification and child schooling in Ethiopia and Uganda
Creators: name: Akoyi, K.T.
name: Mitiku, F.
name: Maertens, M.
name: Akoyi, K.T.
name: Mitiku, F.
name: Maertens, M.
Publisher: name: Unknown
Year: 2018
Subjects: subject: Agricultural and Food Policy
subject: International Development
subject: International Relations/Trade
subject: private sustainability standards
subject: global value chains
subject: child schooling
subject: smallholder farmers
subject: East Africa

description: Private sustainability standards are spreading rapidly in global agri-food value chains as a means of communicating important aspects of safety, ethics and environmental attributes of food production, to consumers. A cross-cutting requirement for most standards is the prohibition of child labour intended to improve child welfare. In this paper, we investigate the child schooling implications in the coffee sector in Ethiopia and Uganda. We use cross-sectional household survey data and probit, tobit, propensity score matching and difference-in-difference techniques to estimate the impact of certification on schooling. We find that FT certification increases the likelihood of children to be enrolled in secondary school by 25% and, primary and secondary schooling efficiency by 10% and 16%, respectively. We find that RA certification has no impact on both school enrolment and schooling efficiency. The results imply that prohibition of child labour alone is not sufficient to improve schooling outcomes and that FT keeps its child welfare promises in South Western Ethiopia and Eastern Uganda.
Enlargement of depressions on comet 81P/Wild 2: Constraint based on 30-year cometary activity in the inner Solar System
Creators: name: Lim, Bumhoo
name: Ishiguro, Masateru
Publisher: name: arXiv
Year: 2024
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Context. The Stardust flyby mission to Jupiter-family comet (JFC) 81P/Wild 2 (hereafter, 81P) captured its dense quasicircular depressions. Nevertheless, the formation mechanism remains a subject of ongoing debate. Aims. We aimed to study how cometary activity contributed to the formation and enlargement of these depressions by analyzing Stardust flyby images and ground-based observation data. Methods. We calculated the time-dependent water production rate of 81P inside the snow line (<3 au) and compared it with the observational data. In addition, we estimated the fallback debris mass using an observation-based model, where a dust ejection from 81P was considered to reproduce ground-based observations of the dust tail. We compared the total excavated volume of water and dust with the total depression volume derived using the 81P shape model. Results. We find that the total excavated volume after 81P was injected into the inner Solar System accounts for up to only 30 % of the depression volume. This insufficiency suggests that a large portion (>70 %) of the depressions had already existed before the comet was injected into the current orbit. In addition, we estimate the dust-to-ice mass ratio for 81P to be 2-14. Conclusions. We suggest that most depressions were formed in the source region of the Kuiper-belt objects.
description: 17 pages, 11 figures
Eliminating excess phase accumulation in a continuous perturbed heterogeneous planar PhC
Creators: name: Moradi, Shahram
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: In this paper, we propose an asymmetric distribution of a hexagonal lattice for achieving near-zero group velocity with negative group delay. This study reports the effect of the continuous geometric perturbation on the photonic band diagram and consequently its impact on phase velocity, group velocity, and effective refractive index. We provide a promising method for modifying the photonic band diagram for obtaining an exotic dispersion diagram. With this obtaining a broadband spanning from E to L band that envelop of light pulse traverse with almost zero velocity is promising enough to apply it in a wide variety of light-based devices.
description: 14 pages, 6 figures
SitPose: Real-Time Detection of Sitting Posture and Sedentary Behavior Using Ensemble Learning With Depth Sensor
Creators: name: Jin, Hang
name: He, Xin
name: Wang, Lingyun
name: Zhu, Yujun
name: Jiang, Weiwei
name: Zhou, Xiaobo
Publisher: name: arXiv
Year: 2024
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Poor sitting posture can lead to various work-related musculoskeletal disorders (WMSDs). Office employees spend approximately 81.8% of their working time seated, and sedentary behavior can result in chronic diseases such as cervical spondylosis and cardiovascular diseases. To address these health concerns, we present SitPose, a sitting posture and sedentary detection system utilizing the latest Kinect depth camera. The system tracks 3D coordinates of bone joint points in real-time and calculates the angle values of related joints. We established a dataset containing six different sitting postures and one standing posture, totaling 33,409 data points, by recruiting 36 participants. We applied several state-of-the-art machine learning algorithms to the dataset and compared their performance in recognizing the sitting poses. Our results show that the ensemble learning model based on the soft voting mechanism achieves the highest F1 score of 98.1%. Finally, we deployed the SitPose system based on this ensemble model to encourage better sitting posture and to reduce sedentary habits.
The ALMA-ATOMS survey: Vibrationally excited HC$_3$N lines in hot cores
Creators: name: Chen, Li
name: Qin, Sheng-Li
name: Liu, Tie
name: Goldsmith, Paul F.
name: Liu, Xunchuan
name: Peng, Yaping
name: Tang, Xindi
name: Garay, Guido
name: Kou, Zhiping
name: Tang, Mengyao
name: Sanhueza, Patricio
name: Li, Ziyang
name: Gorai, Prasanta
name: Das, Swagat R.
name: Bronfman, Leonardo
name: Dewangan, Lokesh
name: García, Pablo
name: Li, Shanghuo
name: Lee, Chang Won
name: Liu, Hong-Li
name: Tóth, L. Viktor
name: Chibueze, James O.
name: Hwang, Jihye
name: Li, Xiaohu
name: Xu, Fengwei
name: Zou, Jiahang
name: Jiao, Wenyu
name: Zhang, Zhenying
name: Zhang, Yong
Publisher: name: arXiv
Year: 2024
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Interstellar molecules are excellent tools for studying the physical and chemical environments of massive star-forming regions. In particular, vibrationally excited HC$_3$N (HC$_3$N*) lines are the key tracers for probing hot cores environments. We present the Atacama Large Millimeter/submillimeter Array (ALMA) 3 mm observations of HC$_3$N* lines in 60 hot cores, aiming to investigate how physical conditions affect the excitation of HC$_3$N* transitions. We have used the XCLASS for line identification. Under the assumption of local thermodynamic equilibrium (LTE), we derived the rotation temperature and column density of HC$_3$N* transitions in hot cores. Additionally, we calculated the H$_2$ column density and number density, along with the abundance of HC$_3$N* relative to H$_2$, to enable a comparison of the physical properties of hot cores with different numbers of HC$_3$N* states. We have detected HC$_3$N* lines in 52 hot cores, in which 29 cores showing more than one vibrationally excited state. Hot cores with higher gas temperatures have more detections of these vibrationally excited lines. The excitation of HC$_3$N* requires dense environments, with its spatial distribution influenced by the presence of UC Hii regions. The observed column density of HC$_3$N* contributes to the number of HC$_3$N* states in hot core environments. After analyzing the various factors influencing HC$_3$N* excitation in hot cores, we conclude that the excitation of HC$_3$N* is mainly driven by mid-IR pumping, while collisional excitation is ineffective.
description: 14 pages, 9 figures
Percolative conductivity in alkaline earth silicate melts and glasses
Creators: name: Malki, M.
name: Micoulaut, M.
name: Chaimbault, F.
name: Vaills, Y.
name: Simon, P.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Ion conducting $(CaO)_x(SiO_2)_{1-x}$ glasses and melts show a threshold behaviour in dc conductivity near $x=x_t=0.50$, with conductivities increasing linearly at $x>x_t$. We show that the behaviour can be traced to a rigid ($x<0.50$) to floppy ($x>0.50$) elastic phase transition near $x=x_t$. In the floppy phase, conductivity enhancement is traced to increased mobility or diffusion of $Ca^{2+}$ carriers as the modified network elastically softens.
description: 15 pages, 5 figures. Europhysics Letters (2003), in press
Matrix Element and Strong Electron Correlation Effects in ARPES from Cuprates
Creators: name: Bansil, A.
name: Markiewicz, R. S.
name: Kusko, C.
name: Lindroos, M.
name: Sahrakorpi, S.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We discuss selected results from our recent work concerning the ARPES (angle-resolved photoemission) spectra from the cuprates. Our focus is on developing an understanding of the effects of the ARPES matrix element and those of strong electron correlations in analyzing photointensities. With simulations on Bi$_2$Sr$_2$CaCu$_2$O$_{8+δ}$ (Bi2212), we show that the ARPES matrix element possesses remarkable selectivity properties, such that by tuning the photon energy and polarization, emission from the bonding or the antibonding states can be enhanced. Moreover, at low photon energies (below 25 eV), the Fermi surface (FS) emission is dominated by transitions from just the O-atoms in the CuO$_2$ planes. In connection with strong correlation effects, we consider the evolution with doping of the FS of Nd$_{2-x}$Ce$_x$CuO$_{4\pmδ}$ (NCCO) in terms of the $t$-$t'$-$U$ Hubbard model Hamiltonian. We thus delineate how the FS evolves on electron doping from the insulating state in NCCO. The Mott pseudogap is found to collapse around optimal doping suggesting the existence of an associated quantum critical point.
description: 5 pages, 4 figures, accepted to be published in Journal of Physics and Chemistry of Solids
Orange Fanta vs orange fruit: A novel measure of nutrition knowledge and women’s diet quality in Malawi
Creators: name: Schneider, K.
name: Masters, W.A.
name: Schneider, K.
name: Masters, W.A.
Publisher: name: Unknown
Year: 2018
Subjects: subject: Agricultural and Food Policy
subject: Food Consumption/Nutrition/Food Safety
subject: International Relations/Trade
subject: nutrition knowledge
subject: women's dietary diversity
subject: Malawi

description: This paper uses a novel survey instrument to identify distinct components of nutrition knowledge, and test for links between knowledge and dietary choices in Southern Malawi. Our first aim is to distinguish respondents’ familiarity with recommended behaviors, such as when to start breastfeeding or introduce solid foods, from respondents’ factual knowledge about mechanisms, such as whether biscuits or papaya and orange fruit or orange Fanta contribute more to future health. We find knowledge of nutrition behaviors to be strongly associated with more schooling, older age and being female, while knowledge of mechanisms is associated only with training and employment as a health professional. We then test whether this expanded definition of nutrition knowledge is associated with dietary intake when controlling for other factors, and find only suggestive evidence for significant links interacting with age of respondents. These findings point to the need for knowledge surveys and public health behavior-change campaigns to address the kinds of information that might have the most influence on actual behavior, potentially including the mechanisms involved in food composition, food safety and disease transmission.
Theoretical modelling of two-component molecular discs in spiral galaxies
Creators: name: Patra, Narendra Nath
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: As recent observations of the molecular discs in spiral galaxies point to the existence of a diffuse, low-density thick molecular disc along with the prominent thin one, we investigate the observational signatures of this thick disc by theoretically modelling two-component molecular discs in a sample of eight nearby spiral galaxies. Assuming a prevailing hydrostatic equilibrium, we set up and solved the joint Poisson's-Boltzmann equation to estimate the three-dimensional distribution of the molecular gas and the molecular scale height in our sample galaxies. The molecular scale height in a two-component molecular disc is found to vary between $50-300$ pc, which is higher than what is found in a single-component disc. We find that this scale height can vary significantly depending on the assumed thick disc molecular gas fraction. We also find that the molecular gas flares as a function of the radius and follows a tight exponential law with a scale length of $\left(0.48 \pm 0.01 \right) r_{25}$. We used the density solutions to produce the column density maps and spectral cubes to examine the ideal observing conditions to identify a thick molecular disc in galaxies. We find that unless the molecular disc is an edge-on system and imaged with a high spatial resolution ($\lesssim 100$ pc), it is extremely hard to identify a thick molecular disc in a column density map. The spectral analysis further reveals that at moderate to high inclination ($i \gtrsim 40^o$), spectral broadening can fictitiously introduce the signatures of a two-component disc into the spectral cube of a single-component disc. Hence, we conclude that a low inclination molecular disc imaged with high spatial resolution would serve as the ideal site for identifying the thick molecular disc in galaxies.
description: Accepted for publication in A&A
title: Acoustic scattering by near-surface inhomogeneities in porous media.
Creators: name: Berry, David Leonard
Publisher: name: The Open University
Year: 1990

description: A theoretical and experimental investigation into the influence of nearsurface ihhomogeneities on the reflection of air-borne acoustic fields at a porous ground surface is conducted. Two theoretical approaches to the three-dimensional physical problem are presented, both being initially formulated as boundary value problems but with subsequent reformulation as boundary integral equations via Green’s Second Theorem. In the first near-surface inhomogeneity approach, a rigid inhomogeneity is embedded within the porous medium and the boundary value problem is formulated by assuming continuity of pressure and normal velocity at the ground surface, Sommerfeld’s radiation conditions, and the Neumann boundary condition on the surface of the inhomogeneity. In the second surface inhomogeneity approach, the boundary value problem is formulated by assuming an impedance boundary condition on the plane boundary. Any near-surface inhomogeneities are assumed to induce a local variation of surface impedance within the boundary, and analytical expressions for such induced variations in surface impedance are presented. The resultant integral equations require knowledge of the Green’s function for acoustic propagation in the presence of a plane boundary but in the absence of the inhomogeneity, and methods for calculating these Green’s functions are discussed.

The numerical solution of the boundary integral equations by a simple , boundary element method is described. The solution, which reduces to a system of linear equations with a block circulant coefficient matrix, is applicable to any inhomogeneity which is axisymmetric about a vertical axis; and for the near-surface inhomogeneity approach, the inhomogeneity must also be smooth. The numerical solutions have shown good agreement with classical results. The experimental measurements, presented in the form of spectra of the difference in sound pressure levels received at vertically separated points above surfaces of different media containing various scatterers, are in good agreement with the theoretical predictions.
Andreas Ludwig (Hg.), unter Mitarbeit von Katja Böhme und Anna Katharina Laschke, Zeitgeschichte der Dinge. Spurensuchen in der materiellen Kultur der DDR, Göttingen (Vandenhoeck & Ruprecht) 2019
Creators: name: Offenstadt, Nicolas
Publisher: name: Francia-Recensio
Year: 2021

description: Andreas Ludwig (Hg.), unter Mitarbeit von Katja Böhme und Anna Katharina Laschke, Zeitgeschichte der Dinge. Spurensuchen in der materiellen Kultur der DDR, Göttingen (Vandenhoeck & Ruprecht) 2019, 378 S., 158 s/w u. farb. Abb., ISBN 978-3-412-51106-7, EUR 35,00.
description: Francia-Recensio, 2021/1
Analysis of Infrastructural Profile and its Impact on Poverty of Rural Communities in Kwara State, Nigeria
Creators: name: Akinsola, G.
name: Adewumi, M.
name: Akinsola, G.
name: Adewumi, M.
Publisher: name: Unknown
Year: 2018
Subjects: subject: Community/Rural/Urban Development
subject: International Development
subject: Infrastructural index
subject: Rural communities
subject: Kwara State

description: One of the goals of any government policies is to maintain an adequate rural infrastructure. This is necessary because of the significance of rural environment, especially in Nigeria since bulk of the food produced come from the rural farmers. This study therefore analyses the infrastructural profile and poverty status of farming households in Edu local government of Kwara state. 120 questionnaires were administered to farm family heads. Descriptive statistics, infrastructural index and simultaneous equation models were used to analyze the data collected. The One Sample T-Test revealed that there is significant difference between the levels of infrastructural development among the farming communities. It is therefore recommended that adequate infrastructural facilities should be readily available for the rural dwellers to improve their agricultural productivity with the resultant effect on poverty reduction
title: MEETING INFORMATION NEEDS IN HIGHER EDUCATION CAREERS ADVISORY SERVICES.
Creators: name: Greer, Paul
Publisher: name: The Open University
Year: 1990

description: The thesis explores meeting information needs in Higher Education Careers Advisory Services. Chapter 1 defines careers information and its place within the guidance process as described in the literature. The facilitative role of Advisory Services, their information needs and sources are discussed, together with graduate employment trends and employers’ perceived recruitment needs. Chapter 2 identifies the importance of targeting user-groups according to need, including minorities. The differences between help and self-help, declared and undeclared needs, are also investigated, together with the nature of careers materials and issues relating to provision. From the first two chapters possible research questions emerge, and ten questions considered appropriate for field research are identified. Chapter 3 outlines the research methods adopted, and sounds cautionary notes. Chapter 4 analyses the responses of twenty-four Careers Advisory Services to a questionnaire designed to obtain information preparatory to interviews with staff in four selected Services. Chapter 5 discusses the findings of interviews with Careers Staff. Significant among them are the facility discrepancies between Universities and Polytechnics; the difficulty of determining whether those available are used to advantage; the limitations of information technology; the disregard of potentially influential external factors on career decision­ making; blandness as a price of objectivity in careers information; the unsuitability of much careers literature; budgetary restrictions facing information officers; the varying receptivity of academic departments to Service initiatives; possible under-utilisation of information staff and their questionable status; differences in record systems and the some­times unhelpful influence of the media. Chapter 6 proposes that: information be more integrated to Service provision; careers literature appeal to a wider range of personal values; students seek information more assiduously; employers use Services to gain knowledge relevant to recruitment, and Services continue and extend their self-scrutiny on information issues.