cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Lichen preservation in amber: morphology, ultrastructure, chemofossils, and taphonomic alteration
Creators: name: Hartl, C.
name: Schmidt, A. R.
name: Heinrichs, J.
name: Seyfullah, L. J.
name: Schäfer, N.
name: Gröhn, C.
name: Rikkinen, J.
name: Kaasalainen, U.
Publisher: name: FID GEO
Year: 2015

description: he fossil record of lichens is scarce and many putative fossil lichens do not show an actual physiological relationship between mycobionts and photobionts or a typical habit, and are therefore disputed. Amber has preserved a huge variety of organisms in microscopic fidelity, and so the study of amber fossils is promising for elucidating the fossil history of lichens. However, so far it has not been tested as to how amber inclusions of lichens are preserved regarding their internal characters, ultrastructure, and chemofossils. Here, we apply light microscopy, scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), and Raman spectroscopy to an amber-preserved Eocene lichen in order to gain information about the preservation of the fossil. The lichen thallus displays lifelike tissue preservation including the upper and lower cortex, medulla, photobiont layer, apothecia, and soredia. SEM analysis revealed globular photobiont cells in contact with the fungal hyphae, as well as impressions of possible former crystals of lichen compounds. EDX analysis permitted the differentiation between halite and pyrite crystals inside the lichen which were likely formed during the later diagenesis of the amber piece. Raman spectroscopy revealed the preservation of organic compounds and a difference between the composition of the cortex and the medulla of the fossil.
description: Open Access Publikationsfonds 2015
title: The Swedenborgian influence on William Blake
Creators: name: Chambers, Leslie
Publisher: name: The Open University
Year: 1995

description: The aim of the thesis is to examine the Blake-Swedenborg connection, and the influence this Swede's writings may have had on Blake's published work. In particular The Songs of Innocence and of Experience and The Marriage of Heaven and Hell are considered in detail to assess a Swedenborgian influence. Also discussed are the annotations Blake made to his copies of Swedenborg's works, namely Heaven and Hell, Divine Love and Wisdom, and Divine Providence. A survey is made of the important literature expressing the Blakean perspective and the Swedenborgian perspective on the relationship. Blake's ambivalence towards Swedenborg is noted in the various periods of his life. The principal Swedenborgian symbols used by Blake are analysed. To set this examination in a Swedenborgian historical context, the development of the early New Church is briefly recorded, showing the links Blake had with Swedenborgian friends and Patrons. A detailed study is made of the Propositions placed before the first General Conference of the New Church and what might have been Blake's reactions to them as he attended the Conference. The thesis concludes with a discussion of the use of the word 'influence', both directly and indirectly as it applies to the Blake-Swedenborg connection. It is accepted that Blake was influenced directly for at least a part of his life by his Swedenborgian reading, and that the ideas gathered were never completely dismissed by him. As a contribution to the continuing study of the Blake- Swedenborg connection, archival material, and sketches and portraits of personalities known to Blake, who had strong Swedenborgian links, are gathered from many world wide locations.
Ciencia Abierta: Plan de Gestión de Datos de investigación
Creators: name: Cortés, Rodrigo
Publisher: name: Zenodo
Year: 2024
Subjects: Ciencia Abierta
Plan de Gestión de Datos

description: El Plan de Gestión de Datos de investigación

La gestión de datos de investigación se refiere al almacenamiento, acceso y preservación de los datos creados o recopilados en el curso de la investigación (Cepal 2022). Las prácticas de gestión de datos de investigación cubren todo el ciclo de vida de los datos, desde la planificación de la investigación hasta su realización, y desde la copia de seguridad de los datos a medida que se crean y utilizan hasta la conservación a largo plazo de los resultados de los datos una vez que ha concluido la investigación (CoData 2022).

Un Plan de Gestión de Datos (PGD) es un documento formal elaborado por el investigador o grupo de investigación, que se desarrolla al inicio de un proyecto de investigación. Describe todos los aspectos de la gestión de los datos, es decir, qué se hará con los datos durante y después del proyecto de investigación (CEPAL 2020).

Un PGD es un instrumento dinámico que debe actualizarse a medida que va avanzando y evolucionando el proyecto de investigación. Es parte integral de una solicitud de financiamiento. Además, son documentos iterativos y sujetos a cambioson mejorados o fortalecidos a través de la colaboración. Por lo tanto, deben mantenerse y actualizarse a lo largo del curso de una investigación. En Chile Si su investigación es financiada con recursos públicos deberá cumplir con la política de Acceso Abierto a la información científica y datos de investigación de la agencia nacional de investigación y desarrollo (ANID).
GFBio Collection Data Centers: Harmonized Data Pipelines for Occurrence Data
Creators: name: Weibulat, Tanja
name: Ebeling, Christian
name: Gleisberg, Maren
name: Glöckler, Falko
name: Klasen, Birgit
name: Monje, Juan Carlos
name: Penzlin, Anke
name: Triebel, Dagmar
Publisher: name: Zenodo
Year: 2021
Subjects: abcd
research data management
GFBio

description: Poster GFBio-03 from the GFBio General Assembly 2021 of the "Work Package 2 - Data Submission, Ingest, Archiving & Publication" of the GFBio Project summarizing the projects and subtasks work and outcome between 2013 and 2021. ABCD is a well recognized TDWG community standard and XML schema for collection and occurrence data. It is appropriate to exchange primary biodiversity data records that document digital specimens and species' occurrences in time and space. The GFBio Submission System is supporting data producers to submit such data for FAIR access guided by the data centers at natural science collections.
Cross country maize market linkages in Africa: integration and price transmission across local and global markets
Creators: name: Pierre, Guillaume
name: Kaminski, Jonathan
name: Pierre, Guillaume
name: Kaminski, Jonathan
Publisher: name: Unknown
Year: 2017
Subjects: subject: Agricultural and Food Policy
subject: Marketing
subject: FOS: Economics and business
subject: Market integration
subject: Agricultural trade
subject: Global VAR
subject: Price transmission
subject: Maize market

description: We model twenty seven sub-Saharan African domestic maize markets within a Global Vector AutorRegression framework. The main purpose is to fully embed multilateral trade flows as a way to better structure local price transmission dynamics and interdependencies and get a more comprehensive picture of food price shocks propagation. We found a generally weak integration of domestic maize markets with regional and global markets. However, even in the absence of long run integration, between-country market contagion remains significant and short run price shocks propagate rapidly. Most local markets appear to be significantly more responsive to local than to global shocks.
Vortex lattices in the lowest Landau level for confined Bose-Einstein condensates
Creators: name: Cooper, N. R.
name: Komineas, S.
name: Read, N.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We present the results of numerical calculations of the groundstates of weakly-interacting Bose-Einstein condensates containing large numbers of vortices. Our calculations show that these groundstates appear to be close to uniform triangular vortex lattices. However, slight deviations from a uniform triangular lattice have dramatic consequences on the overall particle distribution. In particular, we demonstrate that the overall particle distribution averaged on a lengthscale large compared to the vortex lattice constant is well approximated by a Thomas-Fermi profile.
description: 5 pages, 4 figures
Variations of the physical parameters of the blazar Mrk 421 based on the analysis of the spectral energy distributions
Creators: name: Yamada, Yurika
name: Uemura, Makoto
name: Itoh, Ryosuke
name: Fukazawa, Yasushi
name: Ohno, Masanori
name: Imazato, Fumiya
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We report on the variations of the physical parameters of the jet observed in the blazar Mrk 421, and discuss the origin of X-ray flares in the jet, based on the analysis of the several spectral energy distributions (SEDs). The SEDs are modeled using the one-zone synchrotron self-Compton (SSC) model and its parameters determined using a Markov chain Monte Carlo method. The lack of data at TeV energies means many of the parameters cannot be uniquely determined and are correlated. These are studied in detail. We found that the optimal solution can be uniquely determined only when we apply a constraint to one of four parameters: the magnetic field (B), Doppler factor, size of the emitting region, and normalization factor of the electron energy distribution. We used 31 sets of SED from 2009 to 2014 with optical-UV data observed with UVOT/Swift and the Kanata telescope, X-ray data with XRT/Swift, and gamma-ray data with the Fermi Large Area Telescope (LAT). The result of our SED analysis suggests that, in the X-ray faint state, the emission occurs in a relatively small area (~ 10^16 cm) with relatively strong magnetic field (B~10^-1 G). The X-ray bright state shows a tendency opposite to that of the faint state, that is, a large emitting area (~10^18 cm), probably in the downstream of the jet and weak magnetic field (B~10^-3 G). The high X-ray flux was due to an increase in the maximum energy of electrons. On the other hand, the presence of two kinds of emitting areas implies that the one-zone model is unsuitable to reproduce, at least a part of the observed SEDs.
description: 20 pages, 16 figures, accepted for publication in PASJ
title: Poincaré and the Three Body Problem
Creators: name: Barrow-Green, June Elizabeth
Publisher: name: The Open University
Year: 1993

description: The purpose of the thesis is to present an account of Henri Poincare's famous memoir on the three body problem, the final version of which was published in Acta Mathematica in 1890 as the prize-winning entry in King Oscar II's 60th birthday competition. The memoir is reknowned both for its role in providing the foundations for Poincare's celebrated three volume Méthodes Nouvelles de la Mécanique Céleste, and for containing the first mathematical description of chaotic behaviour in a dynamical system.

A historical context is provided both through consideration of the problem itself and through a discussion of Poincaré's earlier work which relates to the mathematics developed in the memoir. The organisation of the Oscar competition, which was undertaken by Gösta Mittag-Leffler, is also described. This not only provides an insight into the late 19th century European mathematical community but also reveals that after the prize had been awarded Poincare found an important error in his work and substantially revised the memoir prior to its publication in Acta. The discovery of a printed version of the original memoir personally annotated by Poincaré has allowed for a detailed comparative study of the mathematics contained in both versions of the memoir. The error is explained and it is shown that it was only as a result of its correction that Poincaré discovered the chaotic behaviour now associated with the memoir.

The contemporary reception of the memoir is discussed and Poincaré's subsequent work in celestial mechanics and related topics is examined. Through the consideration of sources up to 1920 the influence and impact of the memoir on the progress of the three body problem and on dynamics in general is assessed.
title: Controversies and contradictions: approaches to the study of Harriet Martineau 1802-76
Creators: name: Weiner, Gaby
Publisher: name: The Open University
Year: 1992

description: This thesis is a reassessment of Harriet Martineau's place in feminist and mainstream scholarship. It focuses on Harriet Martineau, first, as a subject of research and, second, as an object of text. The importance of Harriet Martineau as a subject of research is explored through consideration of her social position as a nineteenth-century, female, unmarried, middle-class, writer, reformer and intellectual. Further, it is claimed that she provides one of the links between Enlightenment feminism and the nineteenthcentury women's xtcvement in Britain, and that her prioritisation of economic and legal advances for women marks her out as an important feminist theorist. In particular her leaders on the condition of women in the Daily News merit wider attention. As an object of text, Harriet Martineau is investigated through the work of her biographers, ranging from her contemporaries to coimientaries written in the 1970s and 1980s. In examining Harriet Nartineau's writing and that of her biographers, opportunities are provided for the exploration of a range of issues within feminist theory and scholarship. These include questioning conventional notions of significance, the relationship between theory and methodology in feminist research, and the subjective reading of texts.
title: Analysis of human cytomegalovirus in the healthy human carrier
Creators: name: Taylor-Wiedeman, Jean
Publisher: name: The Open University
Year: 1992

description: Much circumstantial evidence has pointed to peripheral blood leukocytes as one site of persistence of Human Cytomegalovirus (HCMV) in healthy carriers. However, the exact population of peripheral blood cells that carry HCMV and to what extent they express HCMV gene products in not known. I have examined the sites of HCMV persistence in the peripheral blood of healthy carriers. Analysis of pure cell populations by the use of the polymerase chain reaction (PCR), sensitive to between 1 and 10 copies of the HCMV genome, showed that the predominant site of persistence was the monocyte. In addition, analysis of healthy seronegative subjects revealed that a significant number (30%) also harbored HCMV. Finally, study of granulocytes demonstrated no evidence of persistent HCMV. Expression of HCMV during persistence was also analyzed, by using reverse transcription PCR (RT-PCR) with a sensitivity of between 1 and 100 infected fibroblasts. RNA from monocytes showed no evidence of polyadenylated immediate early (IE) or late transcripts. In contrast, in vitro differentiated monocyte-derived macrophages (MDM) did show evidence of HCMV gene expression with the class of HCMV genes expressed dependent on the method of differentiation. MDM treated with hydrocortisone (HC) and phorbol 12-myristate 13-acetate, expressed only lEI, but not IE2, glycoprotein B (gB) or phosphoprotein 28 (pp28) transcripts. Whereas, MDM treated with granulocyte-macrophage colony stimulating factor and HC expressed lEI, IE2 and gB, but not pp28 transcripts. In both cases, cocultivation experiments did not show plaques. Therefore, in the healthy carrier, persistence of HCMV in monocytes is independent of HCMV lytic gene expression, but in vitro differentiation of monocytes to MDM induced endogenous HCMV transcription consistent with the known permissivity of in vivo differentiated macrophages to HCMV infection.
Hopf bifurcation in a Mean-Field model of spiking neurons
Creators: name: Cormier, Quentin
name: Tanré, Etienne
name: Veltz, Romain
Publisher: name: arXiv
Year: 2020
Subjects: subject: Probability (math.PR)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 60K35 (Primary) 35B10, 35B32, 60H10 (Secondary)

description: We study a family of non-linear McKean-Vlasov SDEs driven by a Poisson measure, modelling the mean-field asymptotic of a network of generalized Integrate-and-Fire neurons. We give sufficient conditions to have periodic solutions through a Hopf bifurcation. Our spectral conditions involve the location of the roots of an explicit holomorphic function. The proof relies on two main ingredients. First, we introduce a discrete time Markov Chain modeling the phases of the successive spikes of a neuron. The invariant measure of this Markov Chain is related to the shape of the periodic solutions. Secondly, we use the Lyapunov-Schmidt method to obtain self-consistent oscillations. We illustrate the result with a toy model for which all the spectral conditions can be analytically checked.
Lorentz-violating brane worlds and cosmological perturbations
Creators: name: Libanov, M. V.
name: Rubakov, V. A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider an inflating brane-world setup in which 4-dimensional Lorentz-invariance is violated at high 3-momentum scale $P_{LV} \gg H$, where $H$ is the inflationary Hubble parameter. We study massless scalar field in this background as a model for cosmological perturbations. Towards the end of inflation, the spectrum has both the standard, 4-dimensional part due to a brane-localized mode, and exotic, bulk induced contribution. The suppression of the latter is power-law only, $(H/P_{LV})^α$, provided that there exist bulk modes with energies $ω\ll H$. Contrary to general expectations, the exponent $α$ may be smaller than 2, and even smaller than 1, depending on details of the bulk geometry. Furthermore, the overall amplitude of the bulk-induced perturbations is enhanced as compared to the standard part, so the effects due to Lorentz-violation may dominate over the standard mechanism even for $P_{LV} \gg H$.
description: 15 pages, revtex
A theoretical approach to Fano resonances in plasmonic dolmens: Determination of Fano resonance energies for single and multiple modes
Creators: name: M. A. Kuntman
name: E. Kuntman
Publisher: name: Zenodo
Year: 2022
Subjects: Fano resonances, plasmonic dolmens, single and multiple modes

description: We show that Fano resonance spectrum in plasmonic dolmens can be found from the oriented coupled dipoles model. It is also shown that multiple Fano resonance spectrum can also be derived if the two excitation modes of the nanorods are taken into account
Problems related to the taxonomic placement of incompletely preserved amber fossils: transfer of the Paleogene liverwort Cylindrocolea dimorpha (Cephaloziellaceae) to the extant Odontoschisma sect. Iwatsukia (Cephaloziaceae)
Creators: name: Feldberg, Kathrin
name: Váňa, Jiří
name: Schäfer-Verwimp, Alfons
name: Krings, Michael
name: Gröhn, Carsten
name: Schmidt, Alexander R.
name: Heinrichs, Jochen
Publisher: name: FID GEO
Year: 2017

description: A revision of the Baltic and Bitterfeld amber fossils assigned to Cylindrocolea dimorpha (Cephaloziellaceae) has yielded evidence of the presence of multicellular, bifid underleaves, which have not previously been reported for this species and conflict with the current circumscription of the family. We transfer the fossil species to Odontoschisma (sect. Iwatsukia) and propose the new combination O. dimorpha of the Cephaloziaceae. Characteristics of the fossil include an overall small size of the plant, entire-margined, bifid leaves and underleaves, more or less equally thickened leaf cell walls, ventral branching that includes stoloniform branches with reduced leaves, and the lack of a stem hyalodermis and gemmae. Placement of the fossil in Cephaloziaceae profoundly affects divergence time estimates for liverworts based on DNA sequence variation with integrated information from the fossil record. Our reclassification concurs with hypotheses on the divergence times of Cephaloziaceae derived from DNA sequence data that provide evidence of a late Early Cretaceous to early Eocene age of the Odontoschisma crown group and an origin of O. sect. Iwatsukia in the Late Cretaceous to Oligocene.
Limits on deviations from the inverse-square law on megaparsec scales
Creators: name: Sealfon, Carolyn
name: Verde, Licia
name: Jimenez, Raul
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present an attempt to constrain deviations from the gravitational inverse-square law on large-scale structure scales. A perturbed law modifies the Poisson equation, which implies a scale-dependent growth of overdensities in the linear regime and thus modifies the power spectrum shape. We use two large-scale structure surveys (the Sloan Digital Sky survey and the Anglo-Australian Two-degree field galaxy redshift survey) to constrain the parameters of two simple modifications of the inverse-square law. We find no evidence for deviations from normal gravity on the scales probed by these surveys (~ 10^(23) m.)
description: 7 pages, 3 figures. Replaced with published version
Quantum rings for beginners: Energy spectra and persistent currents
Creators: name: Viefers, S.
name: Koskinen, P.
name: Deo, P. Singha
name: Manninen, M.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Theoretical approaches to one-dimensional and quasi-one-dimensional quantum rings with a few electrons are reviewed. Discrete Hubbard-type models and continuum models are shown to give similar results governed by the special features of the one-dimensionality. The energy spectrum of the many-body states can be described by a rotation-vibration spectrum of a 'Wigner molecule' of 'localized' electrons, combined with the spin-state determined from an effective antiferromagnetic Heisenberg Hamiltonian. The persistent current as a function of the magnetic flux through the ring shows periodic oscillations arising from the 'rigid rotation' of the electron ring. For polarized electrons the periodicity of the oscillations is always the flux quantum Phi_0. For nonpolarized electrons the periodicity depends on the strength of the effective Heisenberg coupling and changes from Phi_0 first to Phi_0/2 and eventually to Phi_0/N when the ring gets narrower.
description: 27 pages, 22 figures
A finer singular limit of a single-well Modica--Mortola functional and its applications to the Kobayashi--Warren--Carter energy
Creators: name: Giga, Yoshikazu
name: Okamoto, Jun
name: Uesaka, Masaaki
Publisher: name: arXiv
Year: 2020
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: An explicit representation of the Gamma limit of a single-well Modica--Mortola functional is given for one-dimensional space under the graph convergence which is finer than conventional $L^1$-convergence or convergence in measure. As an application, an explicit representation of a singular limit of the Kobayashi-Warren-Carter energy, which is popular in materials science, is given. Some compactness under the graph convergence is also established. Such formulas, as well as compactness, is useful to characterize the limit of minimizers the Kobayashi-Warren-Carter energy. To characterize the Gamma limit under the graph convergence, a new idea which is especially useful for one-dimensional problem is introduced. It is a change of parameter of the variable by arc-length parameter of its graph, which is called unfolding by the arc-length parameter in this paper.
description: 26 pages, 4 figures
Impacts of Inventory Management on Price Volatility in Agricultural Commodity Markets: Insights from a System Dynamics Model
Creators: name: Berg, Ernst
name: Berg, Ernst
Publisher: name: Unknown
Year: 2017
Subjects: subject: Agricultural and Food Policy
subject: Marketing
subject: FOS: Economics and business
subject: Commodity cycles
subject: Nonlinear dynamics
subject: Price volatility
subject: System dynamics

description: Recent fluctuations of agricultural commodity prices have stimulated the debate on the potential causes of price volatility. One explanation is that weather shocks or other external factors perturb supply, thus leading to price fluctuations. An alternative explanation proposes that the persistent fluctuations are the result of nonlinear dynamics and would even occur in the absence of external shocks. This paper focuses on the latter explanation. We investigate under which conditions price volatility is primarily caused by nonlinear dynamics. Using a system dynamics modelling approach we show that plausible behaviour of actors can lead to persistent price fluctuations, even in the absence of external shocks.
Molecular and Morphological Evidence Challenges the Records of the Extant Liverwort Ptilidium pulcherrimum in Eocene Baltic Amber.
Creators: name: Heinrichs, Jochen
name: Scheben, Armin
name: Lee, Gaik Ee
name: Váňa, Jiří
name: Schäfer-Verwimp, Alfons
name: Krings, Michael
name: Schmidt, Alexander R.
Publisher: name: FID GEO
Year: 2015

description: Preservation of liverworts in amber, a fossilized tree resin, is often exquisite. Twenty-three fossil species of liverworts have been described to date from Eocene (35-50 Ma) Baltic amber. In addition, two inclusions have been assigned to the extant species Ptilidium pulcherrimum (Ptilidiales or Porellales). However, the presence of the boreal P. pulcherrimum in the subtropical or warm-temperate Baltic amber forest challenges the phytogeographical interpretation of the Eocene flora. A re-investigation of one of the fossils believed to be P. pulcherrimum reveals that this specimen in fact represents the first fossil evidence of the genus Tetralophozia, and thus is re-described here as Tetralophozia groehnii sp. nov. A second fossil initially assigned to P. pulcherrimum is apparently lost, and can be reassessed only based on the original description and illustrations. This fossil is morphologically similar to the extant North Pacific endemic Ptilidium californicum, rather than P. pulcherrimum. Divergence time estimates based on chloroplast DNA sequences provide evidence of a Miocene origin of P. pulcherrimum, and thus also argue against the presence of this taxon in the Eocene. Ptilidium californicum originated 25-43 Ma ago. As a result, we cannot rule out that the Eocene fossil belongs to P. californicum. Alternatively, the fossil might represent a stem lineage element of Ptilidium or an early crown group species with morphological similarities to P. californicum.
description: Open-Access Publikationsfonds 2015
Diversity Workbench as a Service at GWDG
Creators: name: Bingert, Sven
name: Link, Anton
name: Weibulat, Tanja
name: Triebel, Dagmar
Publisher: name: Zenodo
Year: 2021
Subjects: research data support
research data management
GFBio
software as a service
dwb

description: Poster GFBio-02 from the GFBio General Assembly 2021 of the Work Package 1 - PR & Outreach of the GFBio Project summarizing the projects and subtasks work and outcome between 2013 and 2021. The GWDG is an infrastructure and services provider for science. With its mission, it is offering services to the GFBio Community and supports the development of NFDI. Together with the SNSB developing and delivering Diversity Workbench (DWB) software, a cloud-based service featuring browser- based individual access to a DWB virtual working environment was developed. The approach is comfortable because the users avoid local software installations and administration with admin rights, and are prevented from data loss due to cloud based storage and automated backups.
Neue Ergebnisse zur Stratigraphie und Landschaftsentwicklung im Jungpleistozän Westholsteins
Creators: name: Menke, Burchard
Publisher: name: Geozon Science Media
Year: 1976

description: An limnischen Sedimenten und an Humusdecken fossiler Böden werden palynologische Untersuchungen durchgeführt. Sie führen zu einer teilweisen Revision der stratigraphischen Einstufung fossiler Böden. Skelettarme Sande wurden bereits vor den eemzeitlichen Bodenbildungen verbreitet abgelagert. Die Eem/Weichsel-Grenze liegt meist an der Basis typisch geschichteter (i. w. wohl niveofluviatiler), skelettarmer Fein- bis Mittelsande, die sich durch maximal zwei, dem Brørup- und Odderade-Interstadial zugeordneten Podsol-Böden untergliedern lassen. Das Roedebaek-Interstadial deutet sich in organogenen Abfolgen allenfalls nur schwach an und führte nicht zu einer Unterbrechung der minerogenen Umlagerungen, ebenso zu keiner nachweisbaren Bodenbildung. Ein jüngeres „Keller-Interstadial" deutet sich in Bodenbildungen schwach an.
description: research
Domain walls in noncommutative gauge theories, folded D-branes, and communication with mirror world
Creators: name: Dubovsky, S. L.
name: Sibiryakov, S. M.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Noncommutative U(N) gauge theories at different N may be often thought of as different sectors of a single theory. For instance, U(1) theory possesses a sequence of vacua labeled by an integer parameter N, and the theory in the vicinity of the N-th vacuum coincides with the U(N) noncommutative gauge theory. We construct domain walls on noncommutative plane, which separate vacua with different gauge groups in gauge theory with adjoint scalar field. The scalar field has nonminimal coupling to the gauge field, such that the scale of noncommutativity is determined by the vacuum value of the scalar field. The domain walls are solutions of the BPS equations in the theory. It is natural to interprete the domain wall as a stack of D-branes plus a stack of folded D-branes. We support this interpretation by the analysis of small fluctuations around domain walls, and suggest that such configurations of branes emerge as solutions of the Matrix model in large class of pp-wave backgrounds with inhomogeneous field strength. We point out that the folded D-brane per se provides an explicit realization of the "mirror world" idea, and speculate on some phenomenological consequences of this scenario.
description: 24 pages, 5 figures; references added
Inter-Comparison and Evaluation of the Global LAI Product (LAI3g) and the Regional LAI Product (GGRS-LAI) over the Area of Kazakhstan
Creators: name: Kappas, Martin
name: Propastin, Pavel
name: Degener, Jan
name: Renchin, Tsolmon
Publisher: name: FID GEO
Year: 2015

description: Open-Access Publikationsfonds 2015
Cosmography using strong lensing systems and cosmic chronometers
Creators: name: Lizardo, Andrés
name: Amante, Mario H.
name: García-Aspeitia, Miguel A.
name: Magaña, Juan
name: Motta, V.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Using a new sub-sample of observed strong gravitational lens systems, for the first time, we present the equation for the angular diameter distance in the $y$-redshift scenario for cosmography and use it to test the cosmographic parameters. In addition, we also use the observational Hubble data from cosmic chronometers and a Joint analysis of both data is performed. Among the most important conclusions are that this new analysis for cosmography using Strong Lensing Systems is equally competitive to constrain the cosmographic parameters as others presented in literature. Additionally, we present the reconstruction of the effective equation of state inferred from our samples, showing that at $z=0$ those reconstructions from Strong Lensing Systems and Joint analysis are in concordance with the standard model of cosmology.
description: Accepted for publication in MNRAS, 13 pages, 8 figures, 9 tables
Are Natural Resource Management Programs Beneficial? Evidence from the POSAF-II case in Nicaragua
Creators: name: De Los Santos, Luis Alberto
name: Bravo-Ureta, Boris Eduardo
name: Cramon-Taubadel, Stephan
name: De Los Santos, Luis Alberto
name: Bravo-Ureta, Boris Eduardo
name: Cramon-Taubadel, Stephan
Publisher: name: Unknown
Year: 2017
Subjects: subject: Agricultural and Food Policy
subject: Natural resource management
subject: Impact evaluation
subject: Intention-to-treat
subject: Spillover
subject: Nicaragua

description: Understanding the impact of programs designed to improve the management of natural resources in agricultural households is a key task to ensure the adoption of sustainable and profitable practices. In this paper, we analyze the economic impact of natural resource technologies delivered during the implementation of POSAF-II in Nicaragua. Results obtained from propensity score matching (PSM), ordinary least squares (OLS), weighted least squares regression (WLS) based on PSM, and instrumental variables (IV) regression indicate that POSAF-II has had a positive impact on the total value of agricultural production of beneficiary farmers.
Spin Related Effects in Transport Properties of "Open" Quantum Dots
Creators: name: Ahmadian, Y.
name: Catelani, G.
name: Aleiner, I. L.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study the interaction corrections to the transport coefficients in open quantum dots (i.e. dots connected to leads of large conductance $G \gg e^2/π\hbar$), via a quantum kinetic equation approach. The effects of all the channels of the universal (in the Random Matrix Theory sense) interaction Hamiltonian are accounted for at one loop approximation. For the electrical conductance we find that even though the magnitude of the triplet channel interaction is smaller than the charging energy, the differential conductance at small bias is greatly affected by this interaction. Furthermore, the application of a magnetic field can significantly change the conductance due to the Zeeman splitting, producing finite bias anomalies. For the thermal conductance we find that the Wiedemann-Franz law is violated by the interaction corrections, and we investigated the effect of magnetic field on the Lorentz ratio for contacts of finite reflection. The charge and triplet channel corrections to the electrical and thermal conductance vanish for reflectionless contacts. In the latter case the temperature and magnetic field dependence of the conductance is determined by the Maki-Thompson correction in the Cooper channel.
description: 27 pages, 8 figures
Spectral signatures of the surface anomalous Hall effect in magnetic axion insulators
Creators: name: Gu, Mingqiang
name: Li, Jiayu
name: Sun, Hongyi
name: Zhao, Yufei
name: Liu, Chang
name: Liu, Jianpeng
name: Lu, Haizhou
name: Liu, Qihang
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The topological surface states of magnetic topological systems, such as Weyl semimetals and axion insulators, are associated with unconventional transport properties such as nonzero or half-quantized surface anomalous Hall effect. Here we study the surface anomalous Hall effect and its spectral signatures in different magnetic topological phases using both model Hamiltonian and first-principles calculations. We demonstrate that by tailoring the magnetization and interlayer electron hopping, a rich three-dimensional topological phase diagram can be established, including three types of topologically distinct insulating phases bridged by Weyl semimetals, and can be directly mapped to realistic materials such as MnBi2Te4/(Bi2Te3)n systems. Among them, we find that the surface anomalous Hall conductivity in the axion-insulator phase is a well-localized quantity either saturated at or oscillating around e2/2h, depending on the magnetic homogeneity. We also discuss the resultant chiral hinge modes embedded inside the side surface bands as the potential experimental signatures for transport measurements. Our study is a significant step forward towards the direct realization of long-sought axion insulators in realistic material systems.
description: 22 pages, 4 figures
Supplementary File 1-NHDE: from Fuzzy optimization for identifying anti-cancer targets with few side effects in constraint-based models of head and neck cancer
Creators: name: Wang, Feng-Sheng
name: Chen, Pei-Rong
name: Chen, Ting-Yu
name: Zhang, Hao-Xiang
Publisher: name: The Royal Society
Year: 2022
Subjects: subject: Biotechnology
subject: 60114 Systems Biology
subject: FOS: Biological sciences
subject: Computational Biology

description: The computational procedures of NHDE for solving the MDM problem.
Sur la présence d'Euphorbia segetalis en Belgique
Creators: name: Tanghe, Martin
name: Valentini, Simon
Publisher: name: Zenodo
Year: 2024

description: On the presence of Euphorbia segetalis in Belgium. The presence since 2018 of Euphorbia segetalis, a strictly Mediterranean species, in a vegetable garden in Rixensart (Walloon Brabant) raises a number of questions, first and foremost regarding its origin and ecology. The discovery in 2022 of a second population of this species in the Pays de Herve (province of Liège) sheds new light on a possible local naturalization in our country. The infraspecific variation of this species is also discussed.
Two new species of megasporangiate Sigillariostrobus Schimper (Sigillariostrobaceae) fructifications from the British Coal Measures
Creators: name: Thomas, B. A.
name: Seyfullah, L. J.
Publisher: name: FID GEO
Year: 2015

description: The arborescent lycophyte group known as the sigillarians bore pedunculate fructifications, including Sigillariostrobus Schimper, which has a known propensity to disaggregate, making comparisons of cones and in situ spores often difficult if not impossible. Sigillariostrobus is monosporangiate, containing either megaspores or microspores. Two new species of Sigillariostrobus with megaspores are described from the British Coal Measures. Two cones of Sigillariostrobus saltwellensis sp. nov. are described from Langsettian–Duckmantian strata of Great Britain, containing in situ Laevigatisporites glabratus (Zerndt) Potonié and Kremp spores, making this the first British Sigillariostrobus species described containing such spores. Sigillariostrobus barkeri sp. nov. is given here to the previously described cone with in situ Tuberculatisporites brevispiculus (Schopf) Potonié and Kremp spores. This is the first Sigillariostrobus cone with this megaspore species in situ, and thus shows that T. brevispiculus and T. mamillarius (Bartlett) Potonié and Kremp are not conspecific as others have previously suggested.
description: Open-Access Publikationsfonds 2015
Measuring the Impact of Agricultural Production Shocks on International Trade Flows
Creators: name: Ferguson, Shon Martin
name: Gars, Johan
name: Ferguson, Shon Martin
name: Gars, Johan
Publisher: name: Unknown
Year: 2017
Subjects: subject: Agribusiness
subject: Food price volatility
subject: Pass-through
subject: Agricultural trade

description: The purpose of this study is to measure the sensitivity of trade volumes and trade unit values to agricultural production shocks. We derive a gravity model of trade with two new features. First, the model assumes perfectly in- elastic supply, which captures the short-run nature of year-to-year production shocks and has important implications for levels of regression coecients and how they can be used to measure the elasticity of substitution. Second, the presence of per-unit trade costs implies that, in percentage terms, unit values based on importing country data (including trade costs) should react less to production shocks than unit values based on exporting country data (exclud- ing trade costs). Using bilateral trade ow data for a large sample of countries and agricultural commodities we nd empirical support for the predictions of the model, with relatively high substitutability between varieties of crops dif- ferentiated by country of origin and quantitatively large per-unit trade costs. Our framework provides a new method for measuring substitution elasticities and per-unit trade costs using international trade data. Furthermore, our results suggest that trade frictions or substitution with other goods diminish the role of international trade as way of coping with production volatility.
QCD perturbation theory at large orders with large renormalization scales in the large $β_0$ limit
Creators: name: Van Acoleyen, K.
name: Verschelde, H.
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We examine the QCD perturbation series at large orders, for different values of the 'large $β_0$ renormalization scale'. It is found that if we let this scale grow exponentially with the order, the divergent series can be turned into an expansion that converges to the Borel integral, with a certain cut off. In the case of the first IR renormalon at $2/β_0$, corresponding to a dimension four operator in the operator product expansion, this qualitatively improves the perturbative predictions. Furthermore, our results allow us to establish formulations of the principle of minimal sensitivity and the fastest apparent convergence criterion that result in a convergent expansion.
description: 14 pages, 5 figures, elaborated conclusions
Efficient synthesis of readily water-soluble sulfonic Acid carbamates.
Creators: name: Idzik, Krzysztof R.
name: Nödler, Karsten
name: Licha, Tobias
Publisher: name: FID GEO
Year: 2015

description: A series of various readily water-soluble carbamates were synthesized with good yields. These compounds are useful chemical tracers for assessing the cooling progress in a georeservoir during geothermal power plant operation. Acylation of primary amines was carried out as well as using a solution of sodium bicarbonate and without the presence of salt. Products were characterized by 1H-NMR and 13C-NMR. Purity was confirmed through elemental analysis.
description: Open Access Publikationsfonds 2015
GFBio WP1: User Engagement and Outreach - Towards Data Literacy and Awareness
Creators: name: Astor, Tina
name: Diepenbroek, Michael
name: Felden, Janine
name: Fichtmüller, David
name: Gerber, Nina
name: Gleisberg, Maren
name: Henkelmann, Antje
name: König-Ries, Birgitta
name: Kostadinov, Ivaylo
name: Kurzawe, Daniel
name: Linares, Jimena
name: Löffler, Felicitas
name: Mau, Franziska
name: Nieschulze, Jens
name: Schöne, David
name: Steckel, Alexander
name: Thiel, Sven
name: Timmermann, Britta
name: Triebel, Dagmar
name: Weber, Judith
name: Weibulat, Tanja
Publisher: name: Zenodo
Year: 2021
Subjects: GFBio
data literacy
research data management
research data support

description: Poster GFBio-01from the GFBio General Assembly 2021 of the Work Package 1 - PR & Outreach of the GFBio Project summarizing the projects work and outcome between 2013 and 2021. The overarching aim of Outreach and User Engagement (WP1) was to raise awareness for research data management among reasearchers and increase data literacy by providing support, training and teaching.
Superconductivity in hexagonal Nb-Mo-Ru-Rh-Pd high-entropy alloys
Creators: name: Liu, Bin
name: Wu, Jifeng
name: Cui, Yanwei
name: Zhu, Qinqing
name: Xiao, Guorui
name: Wu, Siqi
name: Cao, Guanghan
name: Ren, Zhi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We report the superconducting properties of new hexagonal Nb$_{10+2x}$Mo$_{35-x}$Ru$_{35-x}$Rh$_{10}$Pd$_{10}$ high-entropy alloys (HEAs) (0 $\leq$ $x$ $\leq$ 5). With increasing $x$, the superconducting transition temperature $T_{\rm c}$ shows a maximum of 6.19 K at $x$ = 2.5, while the zero-temperature upper critical field $B_{\rm c2}$(0) increases monotonically, reaching 8.3 T at $x$ = 5. For all $x$ values, the specific heat jump deviates from the Bardeen-Cooper-Schreiffer behavior. In addition, we show that $T_{\rm c}$ of these HEAs is not determined mainly by the density of states at the Fermi level and would be enhanced by lowering the valence electron concentration.
title: 'One of the boys?' : an ethnographic study of gender relations, co-education, and initial teacher education in physical education
Creators: name: Flintoff, Anne
Publisher: name: The Open University
Year: 1994

description: This research aimed to investigate the ways in which teacher education institutions constructed, confirmed or contested gender identities in secondary Physical Education (PE). The study centred on an indepth ethnographic study of two case study institutions, chosen to reflect the male and female history of PE initial teacher education (ITE) in Britain. Data was collected from a term's observation in each of the two case study institutions, together with semi-structured interviews with those members of staff who had major control over decision making and policy implementation, as well as through document analysis. Analysis of the ITE courses in both institutions showed that gender issues formed only a small part of the formal curriculum, particularly in the PGCE courses. The attitudes of PB staff revealed either apathy or hostility to the raising of gender issues in their work, although there was evidence of some staff working hard to raise such issues with students. Despite gender forming such a small part in the formal curriculum, it was a major influence on timetabling of physical activities within the PE Subject studies. The rationales for the timetabling revealed strong gender ideologies about the nature of physical ability and performance for men and women. Gender relations were also reproduced through classroom interaction, which was dominated by masculine identity work, by both male students as well as some of the male staff. This involved sexual innuendo and gender joking which was used to put one another down, and to undermine the confidence and skills of women students and staff. As a result, for many of the women, negotiating a gender identity in PE was a difficult and contradictory experience.
Bose-Einstein Condensation of Excitons in Bilayer Electron Systems
Creators: name: Eisenstein, J. P.
name: MacDonald, A. H.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: An ordered state of electrons in solids in which excitons condense was proposed many years ago as a theoretical possibility but has, until recently, never been observed. We review recent studies of semiconductor bilayer systems that provide clear evidence for this phenomenon and explain why exciton condensation in the quantum Hall regime, where these experiments were performed, is as likely to occur in electron-electron bilayers as in electron-hole bilayers. In current quantum Hall exciton condensates, disorder induces mobile vortices that flow in response to a supercurrent and limit the extremely large bilayer counterflow conductivity.
description: 19 pages including 4 figures
Advanced tariff aggregation in global trade models: dismantling tariffs on the Swiss beef market
Creators: name: Himics, Mihaly
name: Listorti, Giulia
name: Tonini, Axel
name: Himics, Mihaly
name: Listorti, Giulia
name: Tonini, Axel
Publisher: name: Unknown
Year: 2017
Subjects: subject: Agricultural and Food Policy
subject: Tariff aggregation
subject: Tariff rate quotas
subject: CAPRI
subject: Switzerland
subject: Beef market

description: Two tariff aggregation extensions to global trade models are proposed, taking advantage of international trade data at the tariff line level. The proposed methods correct for typical biases in tariff aggregation. Firstly, they take into account the substitution effects in an optimal consumption bundle at the tariff line level. Secondly, they also deal with the “water” in tariffs, i.e. the imperfect transmission of tariff cuts to domestic prices. Finally, they model Tariff Rate Quotas explicitly. The aggregators are tested for Swiss tariff dismantling scenarios towards imported EU beef products, after implementing them in a partial equilibrium model of the agricultural sector.