cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
G359.95-0.04: Pulsar Candidate Near Sgr A*
Creators: name: Wang, Q. D.
name: Lu, F. J.
name: Gotthelf, E. V.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report the discovery of a prominent nonthermal X-ray feature located near the Galactic center that we identify as an energetic pulsar wind nebula. This feature, G359.95-0.04, lies 1 lyr north of Sgr A* (in projection), is comet-like in shape, and has a power law spectrum that steepens with increasing distance from the putative pulsar. The distinct spectral and spatial X-ray characteristics of the feature are similar to those belonging the rare class of ram-pressure confined pulsar wind nebulae. The luminosity of the nebula at the distance of \sgra, consistent with the inferred X-ray absorptions, is 1 10^{34} ergs s^{-1} in the 2--10 keV energy band. The cometary tail extends back to a region centered at the massive stellar complex IRS 13 and surrounded by enhanced diffuse X-ray emission, which may represent an associated supernova remnant. Furthermore, the inverse Compton scattering of the strong ambient radiation by the nebula consistently explains the observed TeV emission from the Galactic center. We also briefly discuss plausible connections of G359.95-0.04 to other high-energy sources in the region, such as the young stellar complex IRS 13 and SNR Sgr A East.
description: 11 pages, accepted for publication in MNRAS, higher resolution version at http://www.astro.umass.edu/~wqd/papers/xcomet.pdf
UNTERSUCHUNG DER PRÄFERENZEN RUSSISCHER FACHBESUCHER FÜR AUSGEWÄHLTE MESSELEISTUNGEN
Creators: name: Moser, Nataliya
name: Moser, Nataliya
Publisher: name: Unknown
Year: 2009
Subjects: subject: Agribusiness
subject: International Development
subject: Marketing
subject: FOS: Economics and business
subject: Research and Development/Tech Change/Emerging Technologies
subject: Teaching/Communication/Extension/Profession
subject: Preference Analysis
subject: Choice Based Conjoint Analysis
subject: Benefit segmentation
subject: Russian exhibition
subject: Präferenzanalyse
subject: Choice-Based Conjoint Analyse
subject: Benefitsegmentierung
subject: russische Messe.

description: This paper presents an analysis of preferences of Russian trade visitors for selected exhibit attributes. We used Choice Based Conjoint Analysis to establish realistic measurement of choice tasks and hence to determine respondents behaviour. By conducting latent class analysis we extracted two segments of Russian trade visitors with different preferences for price, web presence, business program, presentations and visitor-service.
New Asymptotic Conservation laws for Electromagnetism
Creators: name: Bhatkar, Sayali Atul
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We obtain the subleading tail to the memory term in the late time electromagnetic radiative field generated due to a generic scattering of charged bodies. We show that there exists a new asymptotic conservation law which is related to the subleading tail term. The corresponding charge is made of a mode of the asymptotic electromagnetic field that appears at $\mathcal{O}(e^5)$ and we expect that it is uncorrected at higher orders. This hints that the subleading tail arises from classical limit of a 2-loop soft photon theorem. Building on the $m=1$ \cite{1903.09133, 1912.10229} and $m=2$ cases, we propose that there exists a conservation law for every $m$ such that the respective charge involves an $\mathcal{O}(e^{2m+1})$ mode and is conserved exactly. This would imply a hierarchy of an infinite number of $m$-loop soft theorems. We also predict the structure of $m^{th}$ order tails to the memory term that are tied to the classical limit of these soft theorems.
description: Eq (54) corrected. Other results unchanged
AI Feynman 2.0: Pareto-optimal symbolic regression exploiting graph modularity
Creators: name: Udrescu, Silviu-Marian
name: Tan, Andrew
name: Feng, Jiahai
name: Neto, Orisvaldo
name: Wu, Tailin
name: Tegmark, Max
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: Information Theory (cs.IT)
subject: Computational Physics (physics.comp-ph)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: We present an improved method for symbolic regression that seeks to fit data to formulas that are Pareto-optimal, in the sense of having the best accuracy for a given complexity. It improves on the previous state-of-the-art by typically being orders of magnitude more robust toward noise and bad data, and also by discovering many formulas that stumped previous methods. We develop a method for discovering generalized symmetries (arbitrary modularity in the computational graph of a formula) from gradient properties of a neural network fit. We use normalizing flows to generalize our symbolic regression method to probability distributions from which we only have samples, and employ statistical hypothesis testing to accelerate robust brute-force search.
description: 17 pages, 6 figs, replaced to match accepted NeurIPS version
Thomas-Fermi generalized approach for studying systems under pressure
Creators: name: Cappelluti, E.
name: Site, L. Delle
Publisher: name: arXiv
Year: 2004
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: In a previous work one of the authors proposed a simple model for studying systems under pressure based on the Thomas-Fermi (TF) model of single atom. In this work we intend to extend the previous work to more general Thomas-Fermi models where electronic exchange and correlation are introduced. To do so, we first study numerically the equation obtained by H.W.Lewis (TFDL) which introduces the effects of exchange and correlation into the original TF equation; next the procedure followed in the previous work is extended to the new approach and a specific example is illustrated. Although one could expect that no big differences were produced by the generalized TF model, we show the qualitative as well as quantitative equivalence with detailed numerical results. These results support the robustness of our conclusions with regards to the model proposed in the previous work and give the character of universality (i.e. to pass from one atom to another, the quantities calculated must be simply scaled by a numerical factor) to the properties of compressed systems shown in this work.
description: 16 pages and 5 figures
Additional file 1 of Quantification of formic acid and acetic acid emissions from heritage collections under indoor room conditions. Part I: laboratory and field measurements
Creators: name: Smedemark, Signe Hjerrild
name: Ryhl-Svendsen, Morten
name: Schieweck, Alexandra
Publisher: name: figshare
Year: 2020
Subjects: subject: Biophysics
subject: Biochemistry
subject: Pharmacology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: Science Policy

description: Additional file 1: Laboratory measurements.
A Novel CMAQ-CNN Hybrid Model to Forecast Hourly Surface-Ozone Concentrations Fourteen Days in Advance
Creators: name: Sayeed, Alqamah
name: Choi, Yunsoo
name: Eslami, Ebrahim
name: Jung, Jia
name: Lops, Yannic
name: Salman, Ahmed Khan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: Machine Learning (cs.LG)
subject: Applications (stat.AP)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Issues regarding air quality and related health concerns have prompted this study, which develops an accurate and computationally fast, efficient hybrid modeling system that combines numerical modeling and machine learning for forecasting concentrations of surface ozone. Currently available numerical modeling systems for air quality predictions (e.g., CMAQ, NCEP EMP) can forecast 24 to 48 hours in advance. In this study, we develop a modeling system based on a convolutional neural network (CNN) model that is not only fast but covers a temporal period of two weeks with a resolution as small as a single hour for 255 stations. The CNN model uses forecasted meteorology from the Weather Research and Forecasting model (processed by the Meteorology-Chemistry Interface Processor), forecasted air quality from the Community Multi-scale Air Quality Model (CMAQ), and previous 24-hour concentrations of various measurable air quality parameters as inputs and predicts the following 14-day hourly surface ozone concentrations. The model achieves an average accuracy of 0.91 in terms of the index of agreement for the first day and 0.78 for the fourteenth day while the average index of agreement for one day ahead prediction from the CMAQ is 0.77. Through this study, we intend to amalgamate the best features of numerical modeling (i.e., fine spatial resolution) and a deep neural network (i.e., computation speed and accuracy) to achieve more accurate spatio-temporal predictions of hourly ozone concentrations. Although the primary purpose of this study is the prediction of hourly ozone concentrations, the system can be extended to various other pollutants.
description: 15 pages, 4 main figures and supplemantary figures and tables
Magnetoelectric effects in heavy-fermion superconductors without inversion symmetry
Creators: name: Fujimoto, Satoshi
Publisher: name: arXiv
Year: 2005
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We investigate effects of strong electron correlation on magnetoelectric transport phenomena in noncentrosymmetric superconductors with particular emphasis on its application to the recently discovered heavy-fermion superconductor CePt$_3$Si. Taking into account electron correlation effects in a formally exact way, we obtain the expression of the magnetoelectric coefficient for the Zeeman-field-induced paramagnetic supercurrent, of which the existence was predicted more than a decade ago. It is found that in contrast to the usual Meissner current, which is much reduced by the mass renormalization factor in the heavy-fermion state, the paramagnetic supercurrent is not affected by the Fermi liquid effect. This result implies that the experimental observation of the magnetoelectric effect is more feasible in heavy-fermion systems than that in conventional metals with moderate effective mass.
description: 8 pages, 2 figures, minor corrections
Environmental Tariffs: Will They Be Captured by Protectionists?
Creators: name: Kerr, William A.
name: Kerr, William A.
Publisher: name: Unknown
Year: 2010
Subjects: subject: Environmental Economics and Policy
subject: Institutional and Behavioral Economics
subject: Political Economy
subject: Research and Development/Tech Change/Emerging Technologies
subject: Resource /Energy Economics and Policy
subject: capture
subject: environmental tariffs
subject: level playing field
subject: protectionism
subject: WTO

description: Environmental tariffs appear to be a politically necessary part of the climate change policies that are emerging in many countries. The appeal of level playing field arguments is seductive and difficult to dispute. Environmental policy makers, however, may be naïve, because they fail to account for the potential of trade policy mechanisms and institutions to be captured by traditional vested interests seeking economic protection. The exact structures and institutional frameworks for environmental tariffs are often left vague by environmental policy makers, making them easy targets for protectionists. Environmental tariffs appear to be particularly vulnerable to capture given the complexity of production and the embryonic stage of the science of measuring carbon intensity. The article outlines the threats to the international trading system posed by environmental tariffs and suggests cooperation between those responsible for developing environmental policy and those responsible for developing trade policy.
Revised empirical likelihood
Creators: name: Grendar, Marian
name: Judge, George G.
name: Grendar, Marian
name: Judge, George G.
Publisher: name: Unknown
Year: 2010
Subjects: subject: Research Methods/ Statistical Methods
subject: empirical estimating equations
subject: generalized minimum contrast
subject: empirical likelihood
subject: generalized empirical likelihood
subject: empty set problem
subject: convex hull restriction
subject: estimating equations
subject: maximum aposteriori probability

description: Empirical Likelihood (EL) and other methods that operate within the Empirical Estimating Equations (E3) approach to estimation and inference are challenged by the Empty Set Problem (ESP). ESP concerns the possibility that a model set, which is data-dependent, may be empty for some data sets. To avoid ESP we return from E3 back to the Estimating Equations, and explore the Bayesian infinite-dimensional Maximum A-posteriori Probability (MAP) method. The Bayesian MAP with Dirichlet prior motivates a Revised EL (ReEL) method. ReEL i) avoids ESP as well as the convex hull restriction, ii) attains the same basic asymptotic properties as EL, and iii) its computation complexity is comparable to that of EL.
Photon-Number-Splitting versus Cloning Attacks in Practical Implementations of the Bennett-Brassard 1984 protocol for Quantum Cryptography
Creators: name: Niederberger, Armand
name: Scarani, Valerio
name: Gisin, Nicolas
Publisher: name: arXiv
Year: 2004
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In practical quantum cryptography, the source sometimes produces multi-photon pulses, thus enabling the eavesdropper Eve to perform the powerful photon-number-splitting (PNS) attack. Recently, it was shown by Curty and Lutkenhaus [Phys. Rev. A 69, 042321 (2004)] that the PNS attack is not always the optimal attack when two photons are present: if errors are present in the correlations Alice-Bob and if Eve cannot modify Bob's detection efficiency, Eve gains a larger amount of information using another attack based on a 2->3 cloning machine. In this work, we extend this analysis to all distances Alice-Bob. We identify a new incoherent 2->3 cloning attack which performs better than those described before. Using it, we confirm that, in the presence of errors, Eve's better strategy uses 2->3 cloning attacks instead of the PNS. However, this improvement is very small for the implementations of the Bennett-Brassard 1984 (BB84) protocol. Thus, the existence of these new attacks is conceptually interesting but basically does not change the value of the security parameters of BB84. The main results are valid both for Poissonian and sub-Poissonian sources.
description: 11 pages, 5 figures; "intuitive" formula (31) added
LiSBOA: LiDAR Statistical Barnes Objective Analysis for optimal design of LiDAR scans and retrieval of wind statistics. Part I: Theoretical framework
Creators: name: Letizia, Stefano
name: Zhan, Lu
name: Iungo, Giacomo Valerio
Publisher: name: arXiv
Year: 2020
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: FOS: Physical sciences

description: A LiDAR Statistical Barnes Objective Analysis (LiSBOA) for optimal design of LiDAR scans and retrieval of the velocity statistical moments is proposed. The LiSBOA represents an adaptation of the classical Barnes scheme for the statistical analysis of unstructured experimental data in N-dimensional spaces and it is a suitable technique for the evaluation over a structured Cartesian grid of the statistics of scalar fields sampled through scanning LiDARs. The LiSBOA is validated and characterized via a Monte Carlo approach applied to a synthetic velocity field. This revisited theoretical framework for the Barnes objective analysis enables the formulation of guidelines for optimal design of LiDAR experiments and efficient application of the LiSBOA for the post-processing of LiDAR measurements. The optimal design of LiDAR scans is formulated as a two cost-function optimization problem including the minimization of the percentage of the measurement volume not sampled with adequate spatial resolution and the minimization of the error on the mean of the velocity field. The optimal design of the LiDAR scans also guides the selection of the smoothing parameter and the total number of iterations to use for the Barnes scheme.
UK parliamentary inquiry into global food crisis: call for evidence: How to better manage water so that 9 billion people can be fed equitably, healthily, safely and sustainably by 2050
Creators: name: Chartres, Colin J.
name: Chartres, Colin J.
Publisher: name: Unknown
Year: 2009
Subjects: subject: Agricultural and Food Policy
subject: Agricultural Finance
subject: Community/Rural/Urban Development
subject: Consumer/Household Economics
subject: Crop Production/Industries
subject: Demand and Price Analysis
subject: Food Consumption/Nutrition/Food Safety
subject: Food Security and Poverty
subject: Political Economy
subject: Production Economics
subject: Research and Development/Tech Change/Emerging Technologies
subject: Research Methods/ Statistical Methods
subject: Resource /Energy Economics and Policy
subject: Research institutes
subject: Agricultural research
subject: Policy
subject: Water resource management
subject: Irrigated farming
subject: Rainfed farming
subject: Farming systems
subject: Food security
subject: Water productivity
subject: Water scarcity
subject: Population growth
subject: Water reuse
subject: Food production
subject: Water use
subject: Biofuels
subject: Urbanization
subject: Climate change

description: Invited submission from the International Water Management Institute (IWMI) to the United Kingdom Parliament on 2 June 2009.
China as an International Travel Destination: A Corpus-based Analysis of Online Travel Blogs
Creators: name: Franceschi, Valeria
Publisher: name: Iperstoria
Year: 2021
Subjects: tourism discourse; collocation analysis; content analysis; tourist gaze; tourism in China

description: User-generated content in tourism has increasingly become an important source of data for multiple aspects of tourism research, including destination image, electronic Word-of-Mouth (eWoM), and destination marketing. Such online material as travel blogs, guides, video blogs and reviews may influence readers and prospective visitors, shaping their gaze on the destination and informing their travel choices. User-generated travel blogs and guides indeed provide a combination of knowledge and information as well as emotions, and are often deemed more reliable than professionally-produced tourist materials. This paper aims at investigating the tourist gaze on China and its population as emerging from travel blogs and travel guides produced by non-professional internet users. Specifically, it wants to determine how popular Chinese destinations and local people are perceived through the eyes of international tourists. To this purpose, a corpus of blogs on travel and life in China was compiled using the text mining software BootCat and then analyzed with the Sketch Engine corpus analysis tool. A quantitative and qualitative mixed method approach was adopted for this study, analyzing keywords and collocational profiles in addition to carrying out content analysis on concordance samples to shed light on how visitors gaze upon major Chinese destinations. Results indicate that visitors have an overall positive perception of China and its people but describe the country in contrasting terms, as seen in previous studies on this destination. Tourists appear to look for elements signifying authenticity, such as historical heritage sites and locals engaging in stereotypical activities.
description: Iperstoria, No 18 (2021): Tourism Discourse in the 21st Century: Challenges and New Directions
PON Virtualisation with EAST-WEST Communications for Low-Latency Converged Multi-Access Edge Computing (MEC)
Creators: name: Das, Sandip
name: Ruffini, Marco
Publisher: name: arXiv
Year: 2020
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: We propose a virtual-PON based Mobile Fronthaul (MFH) architecture that allows direct communications between edge points (enabling EAST-WEST communication). Dynamic slicing improves service multiplexing while supporting ultra-low latency under 100$μ$s between cells and MEC nodes.
description: OFC 2020, 3 pages, 5 Figures
Identifying Robust Milk Production Systems
Creators: name: Anderson, Duncan J.
name: Jack, Claire G.
name: Connolly, Niamh
name: Ferris, Conrad
name: Carson, Alistair
name: Anderson, Duncan J.
name: Jack, Claire G.
name: Connolly, Niamh
name: Ferris, Conrad
name: Carson, Alistair
Publisher: name: Unknown
Year: 2010
Subjects: Production Economics

description: The European dairy industry faces an increasingly uncertain world. There is uncertainty about subsidy payment levels and compliance conditions, global competition, price variability, consumer demand, carbon footprints, water quality, biodiversity, landscapes, animal welfare, food safety, etc. The future is uncertain because it cannot be reliably predicted; therefore the industry must adopt production systems that will be financially robust over a wide range of possible circumstances. Adding to the uncertainty is a lack of consensus regarding the specific characteristics of these sustainable production systems. In this interdisciplinary research project we developed a profit maximizing whole-farm model and employ it to identify robust milk production systems for Northern Ireland under varying market, policy and farm family conditions. The milk production systems incorporated into the model involve variations in date of calving, quantity of concentrate fed, and nature of forage utilized. The model also incorporates a disaggregated specification of time use within farm households and links intra-household resource allocation to the process of agricultural technology adoption. This work illustrates how profit maximizing whole-farm models can play a decision support role in helping farmers, agricultural researchers, agribusiness advisers and agricultural policy makers to identify economically sustainable agricultural production systems.
Simulations from a new neutrino event generator
Creators: name: Juszczak, Cezary
name: Nowak, Jaroslaw A.
name: Sobczyk, Jan T.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We construct a new Monte Carlo generator of events for neutrino interactions. The dynamical models for quasi-elastic reactions, $Δ$ excitation and more inelastic events described by the DIS formalism with the PDFs modified according to recent JLab data are used. We describe in detail single pion production channels, which combine the $Δ$ excitation and DIS contribution. Many comparisons of the outcome of simulations with experimental data are presented.
description: To appear in the proceedings of 4th International Workshop on Neutrino Nucleus Interactions in the Few GeV Region (NuInt05), Okayama, Japan, 26-29 September, 2005
Triplons, Magnons, and Spinons in a Single Quantum Spin System: SeCuO3
Creators: name: Testa, Luc
name: Surija, Vinko
name: Prsa, Krunoslav
name: Steffens, Paul
name: Boehm, Martin
name: Bourges, Philippe
name: Berger, Helmut
name: Normand, Bruce
name: Ronnow, Henrik
name: Zivkovic, Ivica
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Quantum spin systems exhibit an enormous range of collective excitations, but their spin waves, gapped triplons, fractional spinons, or yet other modes are generally held to be mutually exclusive. Here we show by neutron spectroscopy on SeCuO$_3$ that magnons, triplons, and spinons are present simultaneously. We demonstrate that this is a consequence of a structure consisting of two coupled subsystems and identify all the interactions of a minimal magnetic model. Our results serve qualitatively to open the field of multi-excitation spin systems and quantitatively to constrain the complete theoretical description of one member of this class of materials.
description: 8 pages, 5 figures
Hard exclusive production of a vector meson
Creators: name: Ivanov, D. Yu.
name: Krasnikov, G.
name: Szymanowski, L.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The processes of a light neutral vector meson, V=ρ^0, ω, ϕ, electroproduction and a heavy quarkonium, V=J/Ψ, Υ, photoproduction are studied in the framework of QCD factorization. We derive a complete set of hard-scattering amplitudes which describe these processes at next-to-leading order (NLO).
description: 3 pages, prepared for Diffraction 2004, International Workshop on Diffraction in High-Energy Physics, Cala Gonone, Sardinia, Italy, September 18 - 23, 2004
Impact of Risk within the Northern Ireland Dairy Sector
Creators: name: Zhang, Lichun
name: McErlean, Seamus
name: Patton, Myles
name: Zhang, Lichun
name: McErlean, Seamus
name: Patton, Myles
Publisher: name: Unknown
Year: 2010
Subjects: Agricultural and Food Policy

description: This paper examines farmers’ decision making under risk and uncertainty. In particular, the study identifies the type of risk preference (averse, neutral or seeking) and measures the magnitude of risk preference before and after the introduction of the Single Farm Payment (SFP). The analysis therefore provides an insight into the impact of this fundamental policy change on farmer risk behaviour. Furthermore, it examines agricultural production decision making under price uncertainty. Empirically, it evaluates the impact of risk and uncertainty using Farm Business Survey (FBS) data of NI dairy farms. Using an econometric approach (maximize expected utility), a comprehensive methodology is employed that enables price uncertainty and risk preference under the Common Agricultural Policy (CAP) to be analysed simultaneously. The methodology permits the testing of common risk aversion theoretical hypotheses, including Arrow’s hypothesis on the effect of wealth on the measures of risk aversion. Also, this methodology enables the identification of the impact of farmers’ attitude to risk, price uncertainty and other criteria (e.g. age, education, and family labour) on their production decisions. The results are relevant to both policy makers and farmers. With regards to the former, the results reveal the factors which influence famers’ decision making, therefore, enabling policy makers to evaluate the effectiveness and efficiency of agricultural policies and thus introduce improvements in future policies. With regards to farmers, the results demonstrate the consequences of risk and uncertainty on their operational environment.
NACHHALTIGER ANBAU VON BIOENERGIE – EINE ÖKONOMISCH-ÖKOLOGISCHE ANALYSE FÜR DAS UMWELTMINISTERIUM IN BADEN-WÜRTTEMBERG
Creators: name: Angenendt, Elisabeth
name: Konold, Angelika
name: Jooss, Ruediger
name: Bahrs, Enno
name: Zeddies, Jurgen
name: Angenendt, Elisabeth
name: Konold, Angelika
name: Jooss, Ruediger
name: Bahrs, Enno
name: Zeddies, Jurgen
Publisher: name: Unknown
Year: 2010
Subjects: subject: Environmental Economics and Policy
subject: Farm Management
subject: Land Economics/Use
subject: Resource /Energy Economics and Policy
subject: Agrarumweltpolitik
subject: Naturschutz
subject: Bioenergie
subject: ökonomisch-ökologische Analyse
subject: Regionalmodell

description: Im Rahmen des vorgestellten Forschungsvorhabens wurde eine Methode zur ökonomischökologischen Analyse des Anbaus von Energiepflanzen unter Berücksichtigung von Naturschutzforderungen entwickelt. Hierzu wurde in Ergänzungen zu den derzeit geltenden naturschutzrechtlichen Rahmenbedingungen ein Maßnahmenkatalog erstellt der minimal erforderlich wäre, wenn das vielfach geäußerte Ziel, den Verlust an biologischer Vielfalt aufzuhalten, ernsthaft angestrebt werden soll. Um diese Naturschutzvorgaben in das im Projekt verwendete ökonomisch-ökologische Regionalmodell EFEM zu integrieren, wurden landwirtschaftliche Produktionsverfahren bzw. -einschränkungen definiert und die erforderlichen Flächenumfänge quantifiziert. Anhand von Modellrechnungen für das Prognosejahr 2015 wurde das Bioenergiepotenzial exemplarisch für zwei Untersuchungsregionen, eine Ackerbau- und eine intensive Futterbauregion, sowie für Baden-Württemberg insgesamt, abgeschätzt. Es zeigt sich, dass insbesondere die mehrjährigen Kulturen wie Miscanthus und Kurzumtriebsplantagen einen großen Anteil an einer landwirtschaftlichen Energieproduktion ausmachen würden. Insgesamt führen die untersuchten Biomasseszenarien überwiegend zu einer Erhöhung der landwirtschaftlichen Deckungsbeiträge. Die Kosten des untersuchten Maßnahmenkataloges für einen „verbesserten Naturschutz“ würden auf betrieblicher Ebene unter den definierten Modellannahmen vergleichsweise gering ausfallen.
description: A2_1
Disseminating the Tangible and Intangible Heritage of Sacred Places in the 21st Century: The Websites of British and Italian Cathedrals
Creators: name: Bondi, Marina
name: Sezzi, Annalisa
Publisher: name: Iperstoria
Year: 2021
Subjects: tourism, cathedrals; heritage; website communication; knowledge dissemination

description: This paper considers how cultural and religious heritage is disseminated in websites presenting British and Italian cathedrals. Sacred places are typically at the intersection of different forms of tourism—cultural tourism and religious tourism—and contribute to the transmission of tangible and intangible assets (“buildings and monuments, artistic objects, and also texts, legends, rites and so on” [Aulet and Vidal 2018, 244]). The study is based on a corpus of webtexts in Italian and English, collected respectively from the official websites of Italian and British cathedrals. The analysis looks at this kind of tourism discourse as a form of expert-to-non-expert communication that makes the visitor take part in an imaginary journey (Bonsignori and Cappelli 2019; Cappelli and Masi 2019; Cappelli 2016) in which different types of explanation (Calsamiglia and van Dijk 2004) are adopted to make specialized vocabulary accessible to visitors. The focus is on definitions and denomination (in relation to both art/architecture and religion). The quantitative study shows that the Italian corpus presents a marked preference for denomination (and denominations in the field of art/architecture in particular), while the corpus of British cathedrals is characterized by a marked preference for definitions. The qualitative analysis suggests that this may also depend on a marked stylistic preference in Italian for introducing the nicknames of the artists or specifying names in the local dialect, as against a clearer intention of disseminating the cultural and religious heritage to non-experts in the corpus of websites of British cathedrals. The cultural and the religious components, however, seem to be equally important in both corpora and are often inseparable for the two often superimposed types of visitors.
description: Iperstoria, No 18 (2021): Tourism Discourse in the 21st Century: Challenges and New Directions
An empirical temperature calibration for the Delta a photometric system. I. The B-type stars
Creators: name: Paunzen, E.
name: Schnell, A.
name: Maitzen, H. M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We establish an empirical effective temperature calibration of main sequence, luminosity class V to III B-type stars for the Delta a photometric system which was originally developed to detect magnetic chemically peculiar objects of the upper main sequence (early B-type to early F-type) at 5200A. However, this system provides the index (g1-y) which shows an excellent correlation with (B-V) as well as (b-y) and can be used as an indicator of the effective temperature. This is supplemented by a very accurate color-magnitude diagram, y or V versus (g1-y), which can be used, for example, to determine the reddening, distance and age of an open cluster. This makes the Delta a photometric system an excellent tool to investigate the Hertzsprung-Russell-Diagram (HRD) in more detail. Using the reddening-free parameters and already established calibrations within the Stromgren uvbybeta, Geneva 7-color and Johnson UBV systems, a polynomial fit of third degree for the averaged effective temperatures to the individual (g1-y)0 values was derived. For this purpose, data from the literature as well as new observations were taken resulting in 225 suitable bright normal B-type objects. The statistical mean of the error for this sample is 238K which is sufficient to investigate the HRD of distant galactic open clusters as well as extragalactic aggregates in the future.
description: 7 pages, 5 figures, accepted by A&A
The food choice process as experienced by men who live alone
Creators: name: Sellaeg, Kari
Publisher: name: University of British Columbia
Year: 2009

description: Existing knowledge regarding food-related experiences of people who live alone is limited, as is knowledge about the food-related experiences of men. The purpose of this study was therefore to explore the food choice process of younger men who live alone. Twelve men of Euro-Canadian descent, age 27 -47, each completed a one week food diary and participated in a semi-structured interview, which was tape recorded and transcribed verbatim. Data were analyzed using qualitative methods and interpretations of findings were guided by an existing theoretical framework. Three inter-related types of food-related decisions emerged as salient for the participants' food habits: a) deciding whether to eat in or out, b) choosing what to eat when eating in, and c) choosing what/where to eat when eating out. Participants categorized choice outcomes for each decision as accommodating/compromising the values of taste, convenience, nutrition, monetary considerations and social values, however the meaning and emphasis placed on each value, and the process of prioritizing between values, differed across types of decisions. The participants' ideals for food habits encompassed: a) the food itself, with ideals of eating fruit and vegetables, consuming meat in moderation, avoiding fast/junk foods, reducing fat intake, avoiding toxins and emphasizing 'natural' foods; b) eating and the food context, with ideals of eating regularly, eating in and commensality; and c) food identity, with ideals of being organized and being conscious. Participants associated living alone with lack of influence on food choices and reduced motivation and time to prepare food at home. The value of convenience was therefore often emphasized, which caused many participants to eat out frequently. Participants tended to reject traditional hegemonic masculinity by actively embracing the traditionally feminized ideal of being concerned about food habits and viewed engaging in food-related activities as part of being a man. Nutrition researchers and practitioners should be aware that food choice might include several types of decisions. Assessing what these are and the value negotiation process for each might provide more comprehensive understandings of food choice. More effective nutrition education might be provided by assessing and considering how living alone and masculinity influences food habits.
Analysing the Semantic Prosody of Timeliness in Letters to the Editor of “The Times” on the Armenian Question from 1914 to 1926
Creators: name: Martini, Isabella
Publisher: name: Iperstoria
Year: 2021
Subjects: Corpus Linguistics; News values; Letters to the Editor; Evaluative Language; Historical English

description: The Armenian genocide of 1915-1923 (Dadrian 2003) had a massive international news coverage at the time of the events and in the decades that followed (Peltekian 2013; Elayyadi 2017), but few linguistic studies have examined its news discourse. None, so far, has analysed the letters to the editor commenting on the genocide and on the Armenian question at large. Letters to the editor, intended as specific news discourse, rarely have been targeted by linguistic studies (see Chovanec 2012; Romova and Hetet 2012; Pounds 2005; 2006). A corpus of 186 letters to the editor of The Times, published between 1914 and 1926, was collected to examine the linguistic strategies used to construct the newsworthiness of the Armenian genocide through the news value of timeliness. Timeliness is here intended as the recency in time of the events that are commented in the letters to the editor. The concepts of evaluation (Hunston and Thompson 2000), of evaluative parameters in media discourse (Bednarek and Caple 2019) and of semantic prosody (Partington 2004; Sinclair 2004) are applied to most recurrent lexical items related to timeliness (recent, new, last), analysing their concordances and collocates, thus combining discourse analysis with a corpus-driven approach (Tognini-Bonelli 2001; Sinclair 1996, 2004). The findings show the linguistic features of the semantic prosody of timeliness in the corpus.
description: Iperstoria, No 18 (2021): Tourism Discourse in the 21st Century: Challenges and New Directions
Missing Resonances in Kaon Photoproduction on the Nucleon
Creators: name: Mart, T.
name: Sulaksono, A.
name: Bennhold, C.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: New kaon photoproduction data on a proton, gamma + p --> K+ + Lambda, are analyzed using a multipole approach. The background terms are given in terms of gauge invariant, crossing symmetric, Born diagrams with hadronic form factors, while the resonances are parameterized using Breit-Wigner forms. Preliminary results suggest a number of new resonances, as predicted by many quark model studies. A comparison between the extracted multipoles and those obtained from KAON-MAID is presented.
description: 10 pages, 6 figures, invited talk at the International Symposium on Electrophotoproduction of Strangeness on Nucleons and Nuclei (SENDAI 03), Sendai, Japan, 16-18 Jun 2003
AUSWIRKUNGEN DER NOVELLIERUNG DES ERNEUERBARE ENERGIEN-GESETZES AUF DIE LANDWIRTSCHAFT IN DEUTSCHLAND
Creators: name: Goemann, Horst
name: Kreins, Peter
name: Muench, Julia
name: Delzeit, Ruth
name: Goemann, Horst
name: Kreins, Peter
name: Muench, Julia
name: Delzeit, Ruth
Publisher: name: Unknown
Year: 2010
Subjects: subject: Agricultural and Food Policy
subject: Land Economics/Use
subject: Resource /Energy Economics and Policy
subject: Erneuerbare-Energien-Gesetz
subject: EEG 2009
subject: Energiemais
subject: Agrarsektormodell
subject: Landnutzung. RAUMIS
subject: Gülle
subject: Biogas
subject: Gülle-Bonus

description: Die Novellierung des Erneuerbare-Energien-Gesetzes im Jahre 2008 beinhaltete die Einführung eines Bonus für kleinere Biogasanlagen, die einen Substratanteil von mind. 30 % Gülle einsetzen. In diesem Beitrag werden die Auswirkungen der EEG-Novellierung auf die Landwirtschaft mit Hilfe des regionalen Agrarsektormodells RAUMIS und des Standortmodells ReSI-M im Jahr 2020 untersucht. Nach den Modellanalysen führt die Gewährung des Gülle- Bonus’ gegenüber einer Referenzsituation mit dem EEG 2004 einerseits zu der gewollten Zunahme der Gülleverwendung in der Biogaserzeugung. Andererseits resultieren auch deutlich höhere Energiemaispreise, die eine nochmalige Ausweitung des Energiemaisanbaus auf rund 2 Mio. ha induzieren. Um negative Folgeeffekte einer drastischen Ausdehnung des NawaRo- Anbaus zu vermeiden, ist die Ausgestaltung des Güllebonus beispielsweise dahingehend anzupassen, dass nur der auf Gülle einfallende Strom eine Bonusvergütung erhält.
description: A2_2
Testing a new analytic model for gravitational lensing probabilities
Creators: name: Das, Sudeep
name: Ostriker, Jeremiah P.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study gravitational lensing with a multiple lens plane approach, proposing a simple analytical model for the probability distribution function (PDF) of the dark matter convergence, kappa, for the different lens planes in a given cosmology as a function of redshift and smoothing angle, theta. The model is fixed solely by the variance of kappa, which in turn is fixed by the amplitude of the power spectrum, sigma_8. We test the PDF against a high resolution Tree-Particle-Mesh simulation and find that it is far superior to the Gaussian or the lognormal, especially for small values of theta << 1 arcmin and at large values of kappa relevant to strong lensing. With this model, we predict the probabilities of strong lensing by a single plane or by multiple planes. We find that for theta ~ 10 arcsec, a single plane accounts for almost all (~ 98%) of the strong lensing cases for source redshift unity. However, for a more typical source redshift of 4, about 12% of the strong lensing cases will result from the contribution of a secondary clump of matter along the line of sight, introducing a systematic error in the determination of the surface density of clusters, typically overestimating it by about 2-5%. We also find that matter inhomogenieties introduce a dispersion in the value of the angular diameter distance about its cosmological mean. The probable error relative to the mean increases with redshift to a value of about 8% for z ~ 6 and theta ~ 10 arcsec.
description: Accepted for publication in ApJ, 13 pages, 12 figures, revised version, references added, section 6 expanded
Accessible Tourism Discourse and the Pandemic: Linguistic Resilience and Communicative Strategies in the Promotion of ‘Tourism for All’
Creators: name: Gandin, Stefania
Publisher: name: Iperstoria
Year: 2021
Subjects: Accessible tourism discourse; Covid-19 recovery; inclusion

description: Since its outbreak in Asia in 2019, the SARS-CoV-2 pandemic has represented an unprecedented challenge for the tourism sector. In addition to the income losses due to travel restrictions and constantly-changing public health protocols, the uncertainty related to the rapid and increasing evolution of the pandemic has inevitably forced tourism operators to rethink how their work is organised and develop new approaches and procedures for planning and promoting their activities. In this scenario, tourists with disabilities have been hit even harder by the SARS-CoV-2 pandemic, since they have generally been excluded from the main communication channels during the pandemic (UNWTO 2020c). However, more inclusive and accessible approaches by tourism operators could become a profitable opportunity to reboot their activities and overcome the critical effects of the Covid-19 pandemic in a contemporary and future perspective. This study will focus on how tourism discourse is tackling the challenges of the pandemic in the promotion of accessible holidays and Covid-19 related information. By means of discourse analysis and corpus-based methodologies, we will take into consideration the main linguistic and pragmatic features characterising a corpus of promotional web resources employed by public and private operators working in the field of accessible tourism. The research aims to identify and highlight the most effective communicative strategies employed in this sector during the pandemic, in order to understand how language may potentially contribute to a more resilient response to the current tourism crisis. Results will show that verbal and non-verbal resources are the main tools strategically co-employed by accessible tourism operators to instil new trust in the sector, to comply with constantly-changing national and international public health advice and government rules and, at the same time, to ensure safety and social inclusion to visitors and travellers with disabilities.
description: Iperstoria, No 18 (2021): Tourism Discourse in the 21st Century: Challenges and New Directions
D-brane correlators as solutions of Hirota-Miwa equation
Creators: name: Sato, Ryuichi
name: Saito, Satoru
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present a tachyon field, which simply connects to the calculus of the tachyon condensation. The tachyon field acts on any bare boundary state: the Neumann or the Dirichlet state, and generates the boundary state suggested by S.P. de Alwis, which leads to the correct ratio between D-brane tensions. On the other hand we generalize the Hirota-Miwa equation to the case where there are two boundaries. We show that correlation functions made from only the integrand of the tachyon field satisfy the generalized Hirota-Miwa equation. Using the formulation based on this evidence, we suggest that the coordinates in which there exist tachyons on an unstable D-brane be identified as the soliton coordinates in integrable systems. We also evaluate these correlation functions, which have not yet been integrated, to obtain the local information about the tachyons on unstable D-branes. We further see how these amplitudes are affected through the tachyon condensation by integrating the correlators over the tachyon momenta and taking the on-shell limit.
description: 20 pages, revtex, v2:note added
What is ‘English for Tourism’?: An Updated ‘Grounded Review’ of the Literature
Creators: name: Ennis, Michael Joseph
Publisher: name: Iperstoria
Year: 2021
Subjects: English for tourism; English of tourism; English for specific purposes; grounded theory; corpus-based research; literature review

description: This paper reports the results of a replication of an exploratory study conducted five years earlier that sought to answer the deceptively simple question: ‘What is English for Tourism?’. The original study created a corpus of 348 texts that served as a representative sample of all EfT literature available on Google Books and Google Scholar at the time, including both teaching material and academic literature. A qualitative analysis, which categorized and coded the corpus in accordance with grounded theory, revealed two categories of teaching material—those written for local markets and those written for international markets—as well as two parallel research traditions within this niche of applied linguistics: studies that aim to understand and inform the teaching and learning of English for tourism (EfT) and studies that seek to understand and explain the English of tourism (EoT). A quantitative analysis using Microsoft Excel and the free concordancer LancsBox confirmed and qualified these thematic categories via a comparative analysis of the EfT and EoT sub-corpora. The present study employed the same sampling frame to update the existing corpus with 543 texts published or made accessible online over the last five years. The same mixed-methods data analyses were performed on the expanded corpus. The results of the replication reconfirm the semantic, conceptual, theoretical, and methodological differences and interdependencies between EfT and EoT found during the first study. The results also reveal recent shifts in international and national discourses and expose further gaps in the existing body of literature.
description: Iperstoria, No 18 (2021): Tourism Discourse in the 21st Century: Challenges and New Directions