cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Noise sensitivity of sub- and supercritically bifurcating patterns with group velocities close to the convective-absolute instability
Creators: name: Szprynger, A.
name: Luecke, M.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: The influence of small additive noise on structure formation near a forwards and near an inverted bifurcation as described by a cubic and quintic Ginzburg Landau amplitude equation, respectively, is studied numerically for group velocities in the vicinity of the convective-absolute instability where the deterministic front dynamics would empty the system.
description: 16 pages, 7 Postscript figures
Generalized Structure Preserving Preconditioners for Frame-Based Image Deblurring
Creators: name: Bianchi, Davide
name: Buccini, Alessandro
Publisher: name: arXiv
Year: 2020
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: We are interested in fast and stable iterative regularization methods for image deblurring problems with space invariant blur. The associated coefficient matrix has a Block Toeplitz Toeplitz Blocks (BTTB) like structure plus a small rank correction depending on the boundary conditions imposed on the imaging model. In the literature, several strategies have been proposed in the attempt to define proper preconditioner for iterative regularization methods that involve such linear systems. Usually, the preconditioner is chosen to be a Block Circulant with Circulant Blocks (BCCB) matrix because it can be efficiently exploit Fast Fourier Transform (FFT) for any computation, including the (pseudo-)inversion. Nevertheless, for ill-conditioned problems, it is well known that BCCB preconditioners cannot provide a strong clustering of the eigenvalues. Moreover, in order to get an effective preconditioner, it is crucial to preserve the structure of the coefficient matrix. On the other hand, thresholding iterative methods have been recently successfully applied to image deblurring problems, exploiting the sparsity of the image in a proper wavelet domain. Motivated by the results of recent papers, we combine a nonstationary preconditioned iteration with the modified linearized Bregman algorithm (MLBA) and proper regularization operators. Several numerical experiments shows the performances of our methods in terms of quality of the restorations.
Regular inflationary cosmology and gauge theories of gravitation
Creators: name: Minkevich, A. V.
Publisher: name: arXiv
Year: 2003
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Cosmological equations for homogeneous isotropic models filled by scalar fields and ultrarelativistic matter are investigated in the framework of gauge theories of gravity. Regular inflationary cosmological models of flat, closed and open type with dominating ultrarelativistic matter at a bounce are discussed. It is shown that essential part of inflationary cosmological models has bouncing character.
description: 12 pages, LaTeX2e; some corrections and additions are made without changing obtained results
Pseudo-healthy synthesis with pathology disentanglement and adversarial learning
Creators: name: Xia, Tian
name: Chartsias, Agisilaos
name: Tsaftaris, Sotirios A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Pseudo-healthy synthesis is the task of creating a subject-specific `healthy' image from a pathological one. Such images can be helpful in tasks such as anomaly detection and understanding changes induced by pathology and disease. In this paper, we present a model that is encouraged to disentangle the information of pathology from what seems to be healthy. We disentangle what appears to be healthy and where disease is as a segmentation map, which are then recombined by a network to reconstruct the input disease image. We train our models adversarially using either paired or unpaired settings, where we pair disease images and maps when available. We quantitatively and subjectively, with a human study, evaluate the quality of pseudo-healthy images using several criteria. We show in a series of experiments, performed on ISLES, BraTS and Cam-CAN datasets, that our method is better than several baselines and methods from the literature. We also show that due to better training processes we could recover deformations, on surrounding tissue, caused by disease. Our implementation is publicly available at https://github.com/xiat0616/pseudo-healthy-synthesis. This paper has been accepted by Medical Image Analysis: https://doi.org/10.1016/j.media.2020.101719.
description: This paper has been accepted by Medical Image Analysis
Ultrafast studies on the photophysics of matrix-isolated radical cations of polycyclic aromatic hydrocarbons: implications for the Diffuse Interstellar Bands (DIB) problem
Creators: name: Zhao, Liang
name: Lian, Rui
name: Shkrob, Ilya A.
name: Crowell, Robert A.
name: Pommeret, Stanislas
name: Chronister, Eric L.
name: Liu, An Dong
name: Trifunac, Alexander D.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Rapid, efficient deactivation of the photoexcited PAH cations accounts for their remarkable photostability and have important implications for astrochemistry, as these cations are the leading candidates for the species responsible for the diffuse interstellar bands (DIB) observed throughout the Galaxy.Ultrafast relaxation dynamics for photoexcited PAH cations isolated in boric acid glass have been studied using femtosecond and picosecond transient grating spectroscopy. With the exception of perylene+, the recovery kinetics for the ground doublet (D0) states of these radical cations are biexponential, containing a fast (< 200 fs) and a slow (3-20 ps) components. No temperature dependence or isotope effect was observed for the fast component, whereas the slow component exhibits both the H/D isotope effect (1.1-1.3) and strong temperature dependence (15 to 300 K). We suggest that the fast component is due to internal Dn to D0 conversion and the slow component is due to vibrational energy transfer (VET) from a hot D0 state to the glass matrix.
description: 26 pages, 3 figures; w supplement: 8 pages, 8 figures
COMUNIICA No. 15
Creators: name: Inter-American Institute For Cooperation On Agriculture (IICA)
name: Inter-American Institute For Cooperation On Agriculture (IICA)
Publisher: name: Unknown
Year: 2001
Subjects: Agricultural and Food Policy
Environmental Economics and Policy
International Relations/Trade
Research and Development/Tech Change/Emerging Technologies

description: Entire issue. Dual-language Spanish and English.
title: Tourismus und innere Konflikte in Nepal
title: Politische Ökologie als konzeptionelle Bewertungsgrundlage
titleType: AlternativeTitle
Creators: name: Winter, Johannes
name: Becker, Matthias
Publisher: name: Duehrkohp & Radicke, Göttingen
Year: 2004

description: Allein in den vergangenen zehn Jahren sind eine Vielzahl an deutsch- und englischsprachigen Publikationen in der Geographie und den Nachbarwissenschaften erschienen, die sich mit den natur- und kulturräumlichen Entwicklungen in Nepal auseinandergesetzt haben. Studien zu den sozioökonomischen bzw. kulturgeographischen Auswirkungen des Trekkingtourismus auf die Gesellschaft, zu den Land-Stadt-Beziehungen, zu Nationalismus und Ethnizität sowie zu Landeskunde und historisch-geographischer Entwicklung Nepals sind dabei entstanden. Jüngst kamen einige akteursbezogene Arbeiten hinzu, die vor dem konzeptionellen Hintergrund der Politischen Ökologie (u.a. GRANER 1997; SOLIVA 2002) verschiedene Teilbereiche der nepalischen Gesellschaft, wie Forstwirtschaft und Naturschutz, behandeln. Was bislang wenig thematisiert blieb, war die Einbeziehung der äußeren Rahmenbedingungen bei der Analyse der Gesellschafts- und Wirtschaftsbereiche des Landes. Unter Verwendung des Konzeptes der Politischen Ökologie soll nachfolgend gezeigt werden, dass für die Behandlung und Bewertung eines regionalen Untersuchungsaspektes wie der Tourismusentwicklung in Nepal die Berücksichtigung der politischen Situation als Einflussfaktor von grundlegender Bedeutung ist. Nur so können Erkenntnisse gewonnen werden, die Grundlage für ein normatives Handlungskonzept sein und damit Anwendung in der politischen Praxis finden können.
description: research
Neobenedenia longiprostata Bravo-Hollis 1971
Creators: name: Mendoza-Garfias, Berenit
name: García-Prieto, Luis
name: León, Gerardo Pérez-Ponce De
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Platyhelminthes
Monogenea
Capsalidea
Capsalidae
Neobenedenia
Neobenedenia longiprostata

description: Neobenedenia longiprostata Bravo-Hollis, 1971
 Neobenedenia longiprostata Bravo-Hollis, 1971: 158.
HOSTS. — Actinopterygii (gills).
 GEOGRAPHIC DISTRIBUTION. — Baja California. Isla Rasa: Epinephelus analogus (Bravo-Hollis 1971).
SPECIMENS IN COLLECTIONS. — CNHE (155-6) (H, P); USNM (75527)(P).
REMARK
 According to Whittington & Horton (1996), a further study of fresh material of N. longiprostata is needed to determine their independence of N. melleni. Bravo-Hollis (1971) had a query after the identification of host species indicating she was unsure of the host identity.
description: Published as part of Mendoza-Garfias, Berenit, García-Prieto, Luis & León, Gerardo Pérez-Ponce De, 2017, Checklist of the Monogenea (Platyhelminthes) parasitic in Mexican aquatic vertebrates, pp. 501-598 in Zoosystema 39 (4) on page 508, DOI: 10.5252/z2017n4a5, http://zenodo.org/record/4578694
Development and Trade Competitiveness of the Italian Tomato Sector
Creators: name: Lombardi, Alessia
name: Verneau, Fabio
name: Lombardi, Pasquale
name: Lombardi, Alessia
name: Verneau, Fabio
name: Lombardi, Pasquale
Publisher: name: Unknown
Year: 2016
Subjects: subject: Crop Production/Industries
subject: International Relations/Trade
subject: International markets
subject: food
subject: export performance

description: he tomato-processing sector and its products have historically played a strategic role in the context of Italy's fruit and vegetable industry. In recent years, the whole to- mato processing supply chain in Italy has experienced profound restructuring triggered by the reform of the Common Market Organisation, accompanied by increasingly fierce price competition resulting from several emerging countries competing with Italy on foreign markets. We analyse the main changes currently under way in the scenario of international trade in tomato and its deri vatives, and how they have inevitably changed European dynamics and hence the competitiveness of Italian tomato exports. Starting from these general considerations, we seek to ascertain whether Italy has managed to keep pace with the radical changes in the tomato sector and market and whether it has managed to maintain its traditional dominant position internationally. The results show Italy's partial failure to anticipate the new conditions of international trade on tomato and its derivatives, in some cases losing market share.
Neobenedenia pacifica Bravo-Hollis 1971
Creators: name: Mendoza-Garfias, Berenit
name: García-Prieto, Luis
name: León, Gerardo Pérez-Ponce De
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Platyhelminthes
Monogenea
Capsalidea
Capsalidae
Neobenedenia
Neobenedenia pacifica

description: Neobenedenia pacifica Bravo-Hollis, 1971
 Neobenedenia pacifica Bravo-Hollis, 1971: 155.
HOSTS. — Actinopterygii (gills).
 GEOGRAPHIC DISTRIBUTION. — Baja California Sur. Bahía de La Paz: Mugil cephalus (Bravo-Hollis 1971).
SPECIMENS IN COLLECTIONS. — CNHE (157)(H).
REMARK
 According to Whittington & Horton (1996) the collection of further material from the type-host and type-locality will enable a full reappraisal of the validity of N. pacifica.
description: Published as part of Mendoza-Garfias, Berenit, García-Prieto, Luis & León, Gerardo Pérez-Ponce De, 2017, Checklist of the Monogenea (Platyhelminthes) parasitic in Mexican aquatic vertebrates, pp. 501-598 in Zoosystema 39 (4) on page 509, DOI: 10.5252/z2017n4a5, http://zenodo.org/record/4578694
Albanian consumer preferences for the use of dry milk in cheese-making: A conjoint choice experiment
Creators: name: Imami, Drini
name: Zhllima, Edvin
name: Merkaj, Elvina
name: Chan-Halbrendt, Catherine
name: Canavar, Maurizio
name: Imami, Drini
name: Zhllima, Edvin
name: Merkaj, Elvina
name: Chan-Halbrendt, Catherine
name: Canavar, Maurizio
Publisher: name: Unknown
Year: 2016
Subjects: subject: Food Consumption/Nutrition/Food Safety
subject: Livestock Production/Industries
subject: Marketing
subject: FOS: Economics and business
subject: Consumer Preferences
subject: Conjoint Choice Experiment
subject: Latent Class Analysis
subject: Cheese
subject: Powder Milk
subject: Albania

description: his paper analyses consumer preferences for white cheese in Tirana, Albania, ap- plying conjoint choice experiment. Consumer segments were identified based on prefer- ences for selected product attributes, including price, origin, milk type and the use of powder (dry) milk to produce cheese. Result s indicate that the importance of cheese attributes and preferences vary across cons umer classes. The most important factor driving consumer preferences is the type of milk used for cheese-making, which is dominant in two of the four classes identifie d. All consumer classes prefer cheese made without powder milk but rather produced only with fresh raw milk. The use of milk powder is presumably perceived as a non-natural or non-traditional method of produc- ing cheese. On the basis of these findings, food policy makers and law enforcement in- stitutions could consider the introduction of specific cheese labelling rules that guaran- tee quality and transparency, ensuring complete information about production technol- ogy and raw materials, including also the use of dry milk.
Innovation and the role of Social capital in nursery industry: the case of Sicilian micropropagation companies
Creators: name: Timpanaro, Giuseppe
name: Foti, Vera Teresa
name: Timpanaro, Giuseppe
name: Foti, Vera Teresa
Publisher: name: Unknown
Year: 2016
Subjects: subject: Agribusiness
subject: Institutional and Behavioral Economics
subject: Horticultural nursery industry
subject: formal and informal relational networks
subject: market
subject: qualitative analysis

description: he advent of technological innovation does not constitute a process confined to a particular territory or to a specific economic system, but represents a shared opportu- nity, cutting across all regions, sectors, and activities, that is destined to grow to meet the expectations of the modern consumer in terms of food safety, wholesomeness, qual- ity, certification, etc. It is in this context that the work places itself, exploring the role played by social capital in the diffusion of micropropagation in agriculture, an innova- tion able to shift productive chains upstream, particularly in the activities of the nursery industry. The paper demonstrates the influence of numerous relational variables on the success of this activity.
Die Blekinge-Region – Gesteine im Anstehenden und als Geschiebe
Creators: name: Altenburg, Hans-Jörg
Publisher: name: Geozon Science Media
Year: 2012

description: Eine Exkursion führte Mitglieder des Geowissenschaftlichen Vereins Neubrandenburg e.V. in die Region Blekinge in Südschweden. Sie bildet durch ihre zahlreichen anstehenden Granite und Gneise ein wesentliches Liefergebiet für die Geschiebe im östlichen Mecklenburg und Vorpommern. Gesteine aus der Region Blekinge werden als Geschiebe in der Umgebung von Neubrandenburg angetroffen und beschrieben.
description: research
Dynamic Phase Transitions in Coupled Motor Proteins
Creators: name: Stukalin, Evgeny B.
name: Kolomeisky, Anatoly B.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Biomolecules (q-bio.BM)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: The effect of interactions on dynamics of coupled motor proteins is investigated theoretically. A simple stochastic discrete model, that allows to calculate explicitly the dynamic properties of the system, is developed. It is shown that there are two dynamic regimes, depending on the interaction between the particles. For strong interactions the motor proteins move as one tight cluster, while for weak interactions there is no correlation in the motion of the proteins, and the particle separation increases steadily with time. The boundary between two dynamic phases is specified by a critical interaction that has a non-zero value only for the coupling of the asymmetric motor proteins, and it depends on the temperature and the transitions rates. At the critical interaction there is a change in a slope for the mean velocities and a discontinuity in the dispersions of the motor proteins as a function of the interaction energy.
Additional file 1 of Household food insecurity associated with gestacional and neonatal outcomes: a systematic review
Creators: name: Augusto, Ana Lucia Pires
name: Aléxia Vieira De Abreu Rodrigues
name: Talita Barbosa Domingos
name: Salles-Costa, Rosana
Publisher: name: figshare
Year: 2020
Subjects: Medicine
Biotechnology
Science Policy

description: Additional file 1:Table S1. General characteristics from the publications about the relationship between food insecurity (FI), prenatal and neonatal outcomes, potential confoundings, proportion of FI and results identified in the present review. Table referent to all syudies included in this systematic review
Chemodynamics of Green Pea galaxies -- I. Outflows and turbulence driving the escape of ionising photons and chemical enrichment
Creators: name: Hogarth, L.
name: Amorín, R.
name: Vílchez, J. M.
name: Hägele, G. F.
name: Cardaci, M.
name: Pérez-Montero, E.
name: Firpo, V.
name: Jaskot, A.
name: Chávez, R.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We investigate the ionised gas kinematics, physical properties and chemical abundances of SDSS$J$142947, a Green Pea galaxy at redshift z$\sim$0.17 with strong, double-peak Ly$α$ emission and indirect evidence of Lyman continuum (LyC) leakage. Using high-dispersion spectroscopy, we perform a multi-component analysis of emission-line profiles. Our model consistently fits all lines as a narrow component with intrinsic velocity dispersion $σ\sim$40 km s$^{-1}$, and two broader blue-shifted components with $σ\sim$90 km s$^{-1}$ and $\sim$250 km s$^{-1}$. We find electron densities and temperatures, ionisation conditions, and direct O/H and N/O abundances for each component. A highly ionised, metal-poor, young and compact starburst dominates narrow emission, showing evidence of hard radiation fields and elevated N/O. The blue-shifted broader components are consistent with highly turbulent, possibly clumpy ionised gas at the base of a strong photoionised outflow, which accounts for $\gtrsim$50% of the integrated emission-line fluxes. The outflow is dense and metal-enriched compared to the HII regions, with expansion velocities larger than those obtained from UV interstellar absorption lines under standard assumptions. Some of these metals may be able to escape, with outflows loading factors comparable to those found in high-$z$ galaxies of similar SFR/Area. Our findings depict a two-stage starburst picture; hard radiation fields from young star clusters illuminate a turbulent and clumpy ISM that has been eroded by SNe feedback. While UV data suggest an extended Ly$α$ halo with high average HI column density, LyC photons could only escape from SDSS$J$142947 through low HI density channels or filaments in the ISM approaching density-bounded conditions, traced by outflowing gas.
description: 23 pages, 21 figures. Accepted for publication in MNRAS
Description of the processing stages of a Protected Designation of Origin fish product: The Greek caviar "avgotaracho Messolongiou"
Creators: name: Dimitriou, Evangelos
name: Katselis, George
name: Moutopoulos, Dimitrios
name: Milios, Konstantinos
name: Malamis, Antonis
name: Koutsikopoulos, Constantin
name: Dimitriou, Evangelos
name: Katselis, George
name: Moutopoulos, Dimitrios
name: Milios, Konstantinos
name: Malamis, Antonis
name: Koutsikopoulos, Constantin
Publisher: name: Unknown
Year: 2016
Subjects: subject: Agribusiness
subject: Food Consumption/Nutrition/Food Safety
subject: Marketing
subject: FOS: Economics and business
subject: PDO fish products
subject: avgotaracho Messolonghiou
subject: Messolonghi–Etoliko lagoons
subject: dried salted roes
subject: Mugil cephalus

description: he “avgotaracho Messologgiou” PDO is a traditional product with protected des- ignation of origin of which quality control based on the experience of the producers. This is salted, semi-dried whole ovaries of Mugil cephalus that caught during species spawning seaward migration in the barrier traps of the well-defined lagoon system of Mesolonghi-Etolikon. In the present study a description of the processing stages of the above product was conducted. Results showed t hat fresh ovaries drying on ambient air according to climatic conditions for approximately 8 days (mean 7.7 days), up to a weight reduction of about 33.63% (SD: 4.3%) of the initial weight. Thereafter, dried ovaries pass through the waxed-coating stage in which dried weight increased about 20.1% (SD: 4.3%). Although quality control is based on the experience of the produc- ers, processing stages were characterized by high accuracy. The effect of climatic con- ditions on the processing stages was also analysed and discussed. The certification of the product as PDO would safeguard the traditional character of the product against the imports of frozen roes of M. cephalus originating by other regions due to the global expansion of the species.
High-Yielding Genetically Modified Wheat in Germany: Economic Impact Assessment of its Potential
Creators: name: Wree, Philipp
name: Sauer, Johannes
name: Wree, Philipp
name: Sauer, Johannes
Publisher: name: Unknown
Year: 2016
Subjects: subject: Agricultural and Food Policy
subject: Crop Production/Industries
subject: Research and Development/Tech Change/Emerging Technologies
subject: Real options
subject: GM wheat
subject: yield increase
subject: uncertainty
subject: irreversibility

description: A novel genetically modified (GM) wheat variety (HOSUT) shows yield increasing potential of ca. 28%. We apply the real options concept of Maximum Incremental Social Tolerable Irreversible Costs (MISTICs) to conduct an ex-ante assessment of the poten- tial economic impact of HOSUT wheat for Germany. In different scenarios cost and benefits associated with the adoption of this yield-increasing innovation are analyzed. Our results indicate that not authorizing HOSUT wheat is correct if German society values the hazard of social irreversible costs from this GM technology to be between € 7.75 and € 12.78 per citizen or more, depending on the scenario.
Ethanol Production and Food Price: Simultaneous Estimation of Food Demand and Supply
Creators: name: Dority, Bree L.
name: Tenkorang, Frank
name: Dority, Bree L.
name: Tenkorang, Frank
Publisher: name: Unknown
Year: 2016
Subjects: Demand and Price Analysis
Food Security and Poverty
Resource /Energy Economics and Policy

description: We investigate the impact of U.S. and Brazilian ethanol production on global food prices. Our analysis is based on a food demand and food supply simultaneous equation model. We control for the increased demand for food by developing countries, the de- preciation of the U.S. dollar, energy prices, and technological advancement in agricul- tural production. Based on our three-stage least squares results, the rapid expansion of ethanol production is unlikely to have been related to the high food prices experienced in the late 2000s. However, we find that world food prices are significantly impacted by energy prices.
Price dependence and asymmetric responses between coffee varieties
Creators: name: Stavrakoudis, Athanassios
name: Panagiotou, Dimitrios
name: Stavrakoudis, Athanassios
name: Panagiotou, Dimitrios
Publisher: name: Unknown
Year: 2016
Subjects: subject: Agribusiness
subject: Crop Production/Industries
subject: Demand and Price Analysis
subject: coffee qualities
subject: price dependence
subject: price asymmetry
subject: copula

description: he objective of this paper is to assess the degree and the structure of price dependence between four different coffee varieties of the Arabicas and Robustas qualities. This is pursued using the statistical tool of copulas and monthly price data for the period 2006–2015. The empirical results indicate: (i) price booms and price crashes are transmitted with different probabilities in five out of six pairs of different coffee varieties, indicating asymmetric price dependence during extreme market upswings/downswings, and (ii) price in- creases are transmitted faster and more fully than price decreases, since in every pair examined in this study, the upper tail dependence coefficient is higher than the lower tail dependence coefficient. According to the results, coffee producers are more likely to see coffee prices of different varieties of the same and different quality to boom rather than crash together.
Transition to superfluid turbulence governed by an intrinsic parameter
Creators: name: Finne, A. P.
name: Araki, T.
name: Blaauwgeers, R.
name: Eltsov, V. B.
name: Kopnin, N. B.
name: Krusius, M.
name: Skrbek, L.
name: Tsubota, M.
name: Volovik, G. E.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Condensed Matter (cond-mat)
subject: Chaotic Dynamics (nlin.CD)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Hydrodynamic flow in both classical and quantum fluids can be either laminar or turbulent. To describe the latter, vortices in turbulent flow are modelled with stable vortex filaments. While this is an idealization in classical fluids, vortices are real topologically stable quantized objects in superfluids. Thus superfluid turbulence is thought to hold the key to new understanding on turbulence in general. The fermion superfluid 3He offers further possibilities owing to a large variation in its hydrodynamic characteristics over the experimentally accessible temperatures. While studying the hydrodynamics of the B phase of superfluid 3He, we discovered a sharp transition at 0.60Tc between two regimes, with regular behaviour at high-temperatures and turbulence at low-temperatures. Unlike in classical fluids, this transition is insensitive to velocity and occurs at a temperature where the dissipative vortex damping drops below a critical limit. This discovery resolves the conflict between existing high- and low-temperature measurements in 3He-B: At high temperatures in rotating flow a vortex loop injected into superflow has been observed to expand monotonically to a single rectilinear vortex line, while at very low temperatures a tangled network of quantized vortex lines can be generated in a quiescent bath with a vibrating wire. The solution of this conflict reveals a new intrinsic criterion for the existence of superfluid turbulence.
description: Revtex file; 5 pages, 2 figures
d-wave pairing in lightly doped Mott insulators
Creators: name: Plekhanov, Evgeny
name: Becca, Federico
name: Sorella, Sandro
Publisher: name: arXiv
Year: 2004
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We define a suitable quantity $Z_c$ that measures the pairing strength of two electrons added to the ground state wave function by means of the anomalous part of the one-particle Green's function. $Z_c$ discriminates between systems described by one-electron states, like ordinary metals and band insulators, for which $Z_c=0$, and systems where the single particle picture does not hold, like superconductors and resonating valence bond insulators, for which $Z_c \ne 0$. By using a numerically exact projection technique for the Hubbard model at $U/t=4$, a finite value of $Z_c$, with d-wave symmetrry, is found at half filling and in the lightly doped regime, thus emphasizing a qualitatively new feature coming from electronic correlation.
description: 4 pages, 4 figures
Generating spin polarization from vorticity through nonlocal collisions
Creators: name: Weickgenannt, Nora
name: Speranza, Enrico
name: Sheng, Xin-li
name: Wang, Qun
name: Rischke, Dirk H.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We derive the collision term in the Boltzmann equation using the equation of motion for the Wigner function of massive spin-1/2 particles. To next-to-lowest order in $\hbar$ it contains a nonlocal contribution, which is responsible for the conversion of orbital into spin angular momentum. In a proper choice of pseudo-gauge the antisymmetric part of the energy-momentum tensor arises solely from this nonlocal contribution. We show that the collision term vanishes only in global equilibrium and that the spin potential is then equal to the thermal vorticity. In the nonrelativistic limit, the equations of motion for the energy-momentum and spin tensors reduce to the well-known form for hydrodynamics for micropolar fluids.
description: 7 pages
Die Findlinge im Revier Waldsee, Mecklenburg
Creators: name: Stein, Karl-Jochen
Publisher: name: Geozon Science Media
Year: 2014

description: Im Revier Waldsee, zwischen Neustrelitz und Feldberg in der Mecklenburgischen Seenplatte, sind überwiegend Bildungen des Sanders vor der Pommerschen Haupteisrandlage verbreitet. In den Sanderflächen treten vereinzelt sehr große Findlinge auf. Die zwei größten aufgefundenen Findlinge werden petrographisch beschrieben und als schützenswerte Geotope empfohlen.
description: research
Migration of extrasolar planets to large orbital radii
Creators: name: Veras, Dimitri
name: Armitage, Philip J.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Observations of structure in circumstellar debris discs provide circumstantial evidence for the presence of massive planets at large (several tens of au) orbital radii, where the timescale for planet formation via core accretion is prohibitively long. Here, we investigate whether a population of distant planets can be produced via outward migration subsequent to formation in the inner disc. Two possibilities for significant outward migration are identified. First, cores that form early at radii of around 10 au can be carried to larger radii via gravitational interaction with the gaseous disc. This process is efficient if there is strong mass loss from the disc - either within a cluster or due to photoevaporation from a star more massive than the Sun - but does not require the extremely destructive environment found, for example, in the core of the Orion Nebula. We find that, depending upon the disc model, gas disc migration can yield massive planets (several Jupiter masses) at radii of around 20-50 au. Second, interactions within multiple planet systems can drive the outer planet into a large, normally highly eccentric orbit. A series of scattering experiments suggests that this process is most efficient for lower mass planets within systems of unequal mass ratio. This mechanism is a good candidate for explaining the origin of relatively low mass giant planets in eccentric orbits at large radii.
description: MNRAS, in press
Accelerating Auxiliary-Field Quantum Monte Carlo Simulations of Solids with Graphical Processing Unit
Creators: name: Malone, Fionn D.
name: Zhang, Shuai
name: Morales, Miguel A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We outline how auxiliary-field quantum Monte Carlo (AFQMC) can leverage graphical processing units (GPUs) to accelerate the simulation of solid state sytems. By exploiting conservation of crystal momentum in the one- and two-electron integrals we show how to efficiently formulate the algorithm to best utilize current GPU architectures. We provide a detailed description of different optimization strategies and profile our implementation relative to standard approaches, demonstrating a factor of 40 speed up over a CPU implementation. With this increase in computational power we demonstrate the ability of AFQMC to systematically converge solid state calculations with respect to basis set and system size by computing the cohesive energy of Carbon in the diamond structure to within 0.02 eV of the experimental result.
The Physics of X-ray Emission from Accreting Millisecond Pulsars
Creators: name: Poutanen, Juri
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: By analyzing the Rossi X-ray Timing Explorer data on SAX J1808.4-3658 we show that the X-ray emission in accretion powered millisecond pulsars can be produced by Comptonization in a hot slab (radiative shock) of Thomson optical depth tau~1 at the neutron star surface. The escaping radiation consists of two components: a black body and a hard Comptonized tail. These components have very different angular distribution: the black body peaks along the slab normal (a ``pencil''--like emission pattern), while the tail has a broader angular distribution (a ``fan''--like pattern). This results in very different variability properties. We construct a detailed model of the X-ray production accounting for the Doppler boosting, relativistic aberration and gravitational light bending. We are able to reproduce the pulse profiles at different energies, corresponding phase lags, as well as the time-averaged spectrum. We obtain constraints on the neutron star radius: R~11 km if its mass M=1.6 Msun, and R~8.5 km if M=1.4 M_sun. We present simple analytical formulae for computing the light curves and oscillation amplitudes expected from hot spots in X-ray bursters and accretion powered millisecond pulsars. We also propose an analytical expression that can be used to determine the size of the black body emission region from the observed properties.
description: 4 pages, 5 figures; to appear in proceedings of "X-Ray Timing 2003: Rossi and Beyond", ed. P. Kaaret, F. K. Lamb, & J. H. Swank (Melville, NY: American Institute of Physics)
Effect of temperature on red snow crab Chionoecetes japonicus (Crustacea, Decapoda, Majoidea) larval survival, development, and growth under laboratory conditions
Creators: name: Yamamoto, Takeo
name: Ueda, Yuji
name: Hamasaki, Katsuyuki
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Biophysics
subject: Physiology
subject: FOS: Biological sciences
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: 69999 Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Inorganic Chemistry
subject: FOS: Chemical sciences

description: In the Sea of Japan, the mature red snow crab Chionoecetes japonicus is distributed at a depth of 500–2,700 m. However, its planktonic larvae occur at depths shallower than 300 m. To better understand the factors influencing larval dispersal and settlement of the red snow crab in its natural habitat, we tested the effects of temperatures ranging from 1°C to 18°C on the survival, developmental period, and growth of red snow crab zoeal and megalopal larvae. The mean number of days from hatching to second zoeae and megalopae and from megalopae to the first crab instar was significantly shorter at warmer temperatures. Moreover, the relationships between mean temperatures and larval periods were well described by heat summation theory equations and a nonlinear thermodynamic Sharpe-Schoolfield-Ikemoto (SSI) model. The higher survival rate, intrinsic optimum temperatures in the SSI model, and larger carapace width suggested that the optimum temperatures for the development of zoeal and megalopal stages of the red snow crab are 9–10°C and 7–8°C, respectively. A lower optimum temperature in the megalopal stage than in the zoeal stages was considered an adaptation to facilitate deeper vertical distributions in the megalopal stage.
Decoherence scaling transition in the dynamics of quantum information scrambling
Creators: name: Dominguez, Federico D.
name: Rodriguez, Maria Cristina
name: Kaiser, Robin
name: Suter, Dieter
name: Alvarez, Gonzalo A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Reliable processing of quantum information for developing quantum technologies requires precise control of out-of-equilibrium many-bodysystems. This is a highly challenging task as the fragility of quantum states to external perturbations increases with the system-size. Here, we report on a series of experimental quantum simulations that quantify the sensitivity of a controlled Hamiltonian evolution to perturbations that drive the system away from the targeted evolution. Based on out-of-time ordered correlations, we demonstrate that the decay-rate of the process fidelity increases with the effective number $K$ of correlated qubits as $K^α$. As a function of the perturbation strength, we observe a decoherence scaling transition of the exponent $α$ between two distinct dynamical regimes. In the limiting case below the critical perturbation strength, the exponent $α$ drops sharply below 1, and there is no inherent limit to the number of qubits that can be controlled. This resilient quantum feature of the controlled dynamics of quantum information is promising for reliable control of large quantum systems.
description: 5 pages, 3 figures, material and methods
Unterkambrischer Sandstein mit kegelförmigen organischen Strukturen des Conichnus-Typs – ein Fundbericht
Creators: name: Altenburg, Hans-Jörg
Publisher: name: Geozon Science Media
Year: 2014

description: Es wird ein unterkambrisches Sandsteingeschiebe von Rügen mit 14 kegelförmigen Strukturen vom Conichnus-Typ in Vergesellschaftung mit dem Spurenfossil Monocraterion vorgestellt.
description: research
UNISECO Case study Austria: Mitigation of climate change by humus formation and regenerative arable farming in Eastern Austria
Creators: name: Weisshaidinger, Rainer
Publisher: name: Zenodo
Year: 2021
Subjects: UNISECO H2020 project
Austria
case study
climate change
humus formation
regenerative arable farming

description: Presentation at the UNISECO H2020 Final Conference, 18-19 March 2021
 https://uniseco-project.eu/final-conference UNISECO is a European research project aiming to develop innovative approaches to enhance the understanding of socio-economic and policy drivers and barriers for further development and implementation of agro-ecological practices in EU farming systems. Learn more about the project: https://uniseco-project.eu/ This project has received funding from the European Union's H2020 research and innovation programme under grant agreement No 773901.
Spectral classification of B stars: The empirical sequence using SDSS-IV/APOGEE near-IR data
Creators: name: Ramírez-Preciado, Valeria G.
name: Román-Lópes, Alexandre
name: Román-Zuñiga, Carlos G.
name: Hernandez, Jesús
name: García, Anibal
name: Stassun, Keivan
name: Stringfellow, Guy S.
name: Kim, Jinyoung Serena
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a semi-empirical spectral classification scheme for normal B-type stars using near-infrared spectra (1.5-1.7 $μ$m) from the SDSS APOGEE2-N DR14 database. The main motivation for working with B-type stars is their importance in the evolution of young stellar clusters, however we also take advantage of having a numerous sample (316 stars) of B-type star candidates in APOGEE2-N, for which we also have optical (3600-9100 \angstrom) counterparts from the LAMOST survey. By first obtaining an accurate spectral classification of the sources using the LAMOST DR3 spectra and the canonical spectral classification scheme Gray & Corbally 2009, we found a linear relation between optical spectral types and the equivalent widths of the hydrogen lines of the Brackett series in the APOGEE2-N NIR spectra. This relation extends smoothly from a similar relation for O and early-B stars found by Roman-Lopes et al. (2018). This way, we obtain a catalog of B-type sources with features in both the optical and NIR, and a classification scheme refined down to one spectral sub-class.
description: 11 pages, 7 figures and 1 table
Heterotic Flux Compactifications and Their Moduli
Creators: name: Becker, Katrin
name: Tseng, Li-Sheng
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study supersymmetric compactification to four dimensions with non-zero H-flux in heterotic string theory. The background metric is generically conformally balanced and can be conformally Kahler if the primitive part of the H-flux vanishes. Analyzing the linearized variational equations, we write down necessary conditions for the existence of moduli associated with the metric. In a heterotic model that is dual to a IIB compactification on an orientifold, we find the metric moduli in a fixed H-flux background via duality and check that they satisfy the required conditions. We also discuss expressing the conditions for moduli in a fixed flux background using twisted differential operators.
description: 25 pages, harvmac; v2: references added and minor changes; v3: published version, minor clarifications added
Neobenedenia Yamaguti 1963
Creators: name: Mendoza-Garfias, Berenit
name: García-Prieto, Luis
name: León, Gerardo Pérez-Ponce De
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Platyhelminthes
Monogenea
Capsalidea
Capsalidae
Neobenedenia

description: Neobenedenia sp.*
HOSTS. — Actinopterygii (skin).
 GEOGRAPHIC DISTRIBUTION. — Veracruz. Acuario de Veracruz: Oreochromis sp. (Rubio-Godoy et al. 2011).
SPECIMENS IN COLLECTIONS. — CNHE (7447).
description: Published as part of Mendoza-Garfias, Berenit, García-Prieto, Luis & León, Gerardo Pérez-Ponce De, 2017, Checklist of the Monogenea (Platyhelminthes) parasitic in Mexican aquatic vertebrates, pp. 501-598 in Zoosystema 39 (4) on page 509, DOI: 10.5252/z2017n4a5, http://zenodo.org/record/4578694
Tariff reforms in the presence of pollution
Creators: name: Vlassis, Nikolaos
name: Vlassis, Nikolaos
Publisher: name: Unknown
Year: 2016
Subjects: subject: Environmental Economics and Policy
subject: International Relations/Trade
subject: Public Economics
subject: Environmental taxation
subject: Tariff reforms
subject: BTAs
subject: International trade
subject: Pareto efficiency
subject: Pareto improving reforms
subject: Climate change

description: A number of countries are considering, mainly as part of their obligations under current treaties, domestic actions to internalize the social cost of pollution. One of the major ob- stacles, however, in those countries is the fear of jeopardizing their competitive position in world markets. A policy that has been repeatedly proposed to deal with this challenge is a tariff mitigating any distortions arising from cross-country differences in environmental pol- icy. Such unilateral actions are the focus of this paper. It is argued that if a country set its pollution taxes optimally, cooperatively or non-cooperatively, there exist unilateral tariff reforms that improve global welfare
A Dynamic Analysis of Egyptian Orange Exports to Russia: A Co-integration Analysis
Creators: name: Hatab, Assem Abu
name: Nsabimana, Aimable
name: Hatab, Assem Abu
name: Nsabimana, Aimable
Publisher: name: Unknown
Year: 2016
Subjects: subject: Crop Production/Industries
subject: International Relations/Trade
subject: Egypt Orange exports
subject: Russia
subject: FMOLS
subject: DOLS and ARDL

description: This paper analyzes the determinants of Egyptian orange exports to Russia by apply- ing an autoregressive distributed lag approach to quarterly data covering the period 1996-2014. Our major findings indicate that i) A one percent increase in the Russian GDP would lead to an increase of about 3.7% in Egypt’s orange exports to Russia in the long run, ii) Egypt’s export price relative to the export prices of other competitors has a negative statistically significant influence on orange exports to Russia, and iii) unlike our expectations, trade liberalization efforts between Egypt and Russia have had a negative influence on orange exports to Russia.
Exploring the nature and synchronicity of early cluster formation in the Large Magellanic Cloud V: Multiple Populations in ancient Globular Clusters
Creators: name: Gilligan, Christina K.
name: Chaboyer, Brian
name: Cummings, Jeffrey D.
name: Mackey, Dougal
name: Cohen, Roger E.
name: Geisler, Douglas
name: Grocholski, Aaron J.
name: Parisi, M. C.
name: Sarajedini, Ata
name: Ventura, Paolo
name: Villanova, Sandro
name: Yang, Soung-Chul
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We examine four ancient Large Magellanic Cloud (LMC) globular clusters (GCs) for evidence of multiple stellar populations using the Advanced Camera for Surveys and Wide Field Camera 3 on the Hubble Space Telescope Programme GO-14164. NGC 1466, NGC 1841, and NGC 2257 all show evidence for a redder, secondary population along the main-sequence. Reticulum does not show evidence for the presence of a redder population, but this GC has the least number of stars and Monte Carlo simulations indicate that the sample of main sequence stars is too small to robustly infer whether a redder population exists in this cluster. The second, redder, population of the other three clusters constitutes $\sim30-40\%$ of the total population along the main-sequence. This brings the total number of ancient LMC GCs with known split or broadened main-sequences to five. However, unlike for Hodge 11 and NGC 2210 (see arXiv:1904.01434), none of the clusters show evidence for multiple populations in the horizontal branch. We also do not find evidence of a second population along the Red Giant Branch (RGB).
description: Accepted in MNRAS
How to convince others ? Monte Carlo simulations of the Sznajd model
Creators: name: Stauffer, Dietrich
Publisher: name: arXiv
Year: 2003
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: In the Sznajd model of 2000, a pair of neighbouring agents on a square lattice convinces its six neighbours of the pair opinion if and only if the two agents of the pair share the same opinion. It differs from other consensus models of sociophysics (Deffuant et al., Hegselmann and Krause) by having integer opinions like $\pm 1$ instead of continuous opinions. The basic results and the progress since the last review are summarized here.
description: 11 pages including 2 figures and 2 programs. Conference 50th Anniversary of the Metropolis Algorithm