cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Relevance of the small frequency separation for asteroseismic stellar age, mass, and radius. A statistical investigation for main-sequence low-mass stars
Creators: name: Valle, G.
name: Dell'Omodarme, M.
name: Moroni, P. G. Prada
name: Degl'Innocenti, S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We performed a theoretical analysis on the relevance of the small frequency separation $δν$ in determining stellar ages, masses, and radii. We adopted the SCEPtER pipeline for low-mass stars, [0.7, 1.05] Msun. Synthetic stars were generated and reconstructed assuming different relative precision in $δν$ (5% and 2%). The quantification of the systematic errors arising from a mismatch between synthetic stars and the recovery grid was also performed. The biases were negligible. The statistical error in age estimates was strongly dependent on the stellar evolutionary phase. It is at its maximum at ZAMS and decreases to about 11% and 6% ($δν$ at 5% and 2% level) when stars reach the 30% of their evolutionary MS lifetime, then vanishes in the last 20% of the MS. For mass and radius estimates we detected nearly identical behavior for an observational uncertainty of 5%. No benefit was detected for mass and radius determinations from a reduction $δν$ precision to 2%. The impact on the age of the initial helium abundance resulted in negligible results. On the other hand greater bias (2% and 1%) in mass and radius estimates were detected whenever $δν$ is in the observational pool. This result, together with the presence of further unexplored uncertainty sources, suggest that precision in the derived stellar quantities below these thresholds may possibly be overoptimistic. [...] Finally, we compared the estimates by the SCEPtER pipeline for 13 Kepler asteroseismic LEGACY sample stars with those given by six different pipelines. Overall, on the LEGACY sample data, we obtained a multi-pipeline precision of about 4.4%, 1.7%, and 11% on the estimated masses, radii, and ages, respectively.
description: Accepted for publication in A&A. Abstract severely abridged to match arxiv requirements
Manifold Proximal Point Algorithms for Dual Principal Component Pursuit and Orthogonal Dictionary Learning
Creators: name: Chen, Shixiang
name: Deng, Zengde
name: Ma, Shiqian
name: So, Anthony Man-Cho
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optimization and Control (math.OC)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: Signal Processing (eess.SP)
subject: Machine Learning (stat.ML)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: We consider the problem of maximizing the $\ell_1$ norm of a linear map over the sphere, which arises in various machine learning applications such as orthogonal dictionary learning (ODL) and robust subspace recovery (RSR). The problem is numerically challenging due to its nonsmooth objective and nonconvex constraint, and its algorithmic aspects have not been well explored. In this paper, we show how the manifold structure of the sphere can be exploited to design fast algorithms for tackling this problem. Specifically, our contribution is threefold. First, we present a manifold proximal point algorithm (ManPPA) for the problem and show that it converges at a sublinear rate. Furthermore, we show that ManPPA can achieve a quadratic convergence rate when applied to the ODL and RSR problems. Second, we propose a stochastic variant of ManPPA called StManPPA, which is well suited for large-scale computation, and establish its sublinear convergence rate. Both ManPPA and StManPPA have provably faster convergence rates than existing subgradient-type methods. Third, using ManPPA as a building block, we propose a new approach to solving a matrix analog of the problem, in which the sphere is replaced by the Stiefel manifold. The results from our extensive numerical experiments on the ODL and RSR problems demonstrate the efficiency and efficacy of our proposed methods.
description: Accepted in IEEE Transactions on Signal Processing
Hubble Space Telescope Imaging of the WR 38/WR38a Cluster
Creators: name: Wallace, Debra J.
name: Gies, Douglas R.
name: Moffat, Anthony F. J.
name: Shara, Michael M.
name: Niemela, Virpi S.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We are conducting a high angular resolution imaging survey of Galactic Wolf-Rayet stars using the Wide Field and Planetary Camera 2 aboard the Hubble Space Telescope. We have found a small stellar cluster associated with the faint, close pair WR 38 and WR 38a. We present astrometric measurements and photometry in the wide-band F336W (U), F439W (B), and F555W (V) filter system for these cluster and nearby stars. We compare their colors and magnitudes with calibrated model results for reddened stars to identify seven probable main sequence members of the cluster. A least-squares fit of the colors and magnitudes of this set yields a cluster reddening of E(B-V) = 1.45 +/- 0.14 mag and a distance of 3.7^{+3.8}_{-1.2} kpc. We discuss the relationship of this cluster to other objects along the line of sight, and we argue that the distance probably lies in the range 5 - 8 kpc (but is not as great as 14.5 kpc distance recently advocated by Shorlin, Turner, & Pedreros). At a distance of 8 kpc, the cluster would reside in a dense region of the Carina spiral arm, close to a giant molecular cloud and the starburst cluster NGC 3603.
description: Submitted to AJ, 24 pages, 3 figures Content is significantly changed
Jaliscia caballeroi
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
Mazocraeidea
Microcotylidae
Jaliscia
Jaliscia caballeroi

description: Jaliscia caballeroi (Bravo-Hollis, 1960)
 Microcotyle caballeroi Bravo-Hollis, 1960: 87.
 Jaliscia caballeroi – Mamaev & Egorova 1977: 104.
HOSTS. — Actinopterygii (gills).
 GEOGRAPHIC DISTRIBUTION. — Baja California Sur. Isla del Carmen: Caulolatilus princeps (Payne 1991) **.
 Jalisco. Puerto Vallarta: Selar crumenophthalmus (Bravo-Hollis 1960).
 Sinaloa. Mazatlán: Caulolatilus affinis (Lamothe-Argumedo et al. 1997b).
 Sonora. Bahía de Guaymas: C. princeps (Bravo-Hollis 1981c).
 SPECIMENS IN COLLECTIONS. — CNHE (147-8, 179, 370) (H, P); MNHN-HEL697, MNHN-HEL698.
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 554, DOI: 10.5252/z2017n4a5, http://zenodo.org/record/4578694
Agrifood System Transformation in the Midstream and Downstream: Research Findings, Implied Risks, and Implications for Policy and Value Chain Program Design
Creators: name: Tschirley, D.
name: Reardon, T.
name: Minten, B.
name: Liverpool-Tasie, S.
name: Tschirley, D.
name: Reardon, T.
name: Minten, B.
name: Liverpool-Tasie, S.
Publisher: name: Unknown
Year: 2017
Subjects: subject: Agricultural and Food Policy
subject: Food Security and Poverty
subject: International Development
subject: agrifood system transformation
subject: value chain program
subject: Africa

description: Research by Michigan State University and the International Food Policy Research Institute under the Food Security Policy Innovation lab has documented profound changes taking place in African agrifood systems, driven by rapid urbanization, growth in per capita incomes, and the increasing reach of globalized markets over the past fifteen- to twenty years. Based on detailed analysis of household expenditure data sets across East and Southern Africa, processed food inventories in eight cities of three countries, and ongoing survey research on rapidly growing and transforming value chains (teff in Ethiopia, poultry in Nigeria, and grain milling in Tanzania), this Policy Research Brief does three things: (1) summarizes the key research findings; (2) identifies the risks that these patterns of change imply for sustained and inclusive growth; and (3) highlights implications of the patterns and the implied risks for the design of policies and value chain programs in this dynamic environment.
The Agnostic Meaning Substrate (AMS): A Theoretical Framework for Emergent Meaning in Large Language Models
Creators: name: Palmer, Russ
Publisher: name: Zenodo
Year: 2025
Subjects: Large Language Models, AI Semantics, Emergent Meaning, AMS Theory, Computational Linguistics, Subsymbolic Computation, Cognitive Science

description: Recent advances in large language models (LLMs) have revealed unprecedented fluency, reasoning, and cross-linguistic capabilities. These behaviors challenge traditional theories of how meaning arises in artificial systems. This paper introduces the concept of the Agnostic Meaning Substrate (AMS)—a hypothesized, non-symbolic, language-independent structure within LLMs that stabilizes meaning before it is surfaced as language. Drawing on recent empirical research from Anthropic and OpenAI, AMS is defined not as a conscious space, but as a computational structure capable of supporting semantic coherence, analogical reasoning, and multilingual resonance. We outline five testable hypotheses related to the emergence, topology, and scaling properties of AMS, and explore the theoretical, ethical, and philosophical implications of such a structure. If validated, AMS offers a novel framework for understanding how meaning may emerge in complex systems—without mind, yet with integrity.
A Hora de Ouro
Creators: name: Machado, Elizabeth Bárbara Teixeira
name: Coelho, Laryssa de Souza
name: Velasco, Mariana dos Santos
name: Silva, Nathany Braga de Carvalho
name: Silva, Nathalia Ferreira da
name: Mendonça, Suellen Gervásio L.
name: Medina, Edymara Tatagiba
name: Zveiter, Marcele
Publisher: name: Zenodo
Year: 2022

description: Trabalho apresentado à Subárea Saúde Mulher II - 7º período, do Departamento de Enfermagem Materno-Infantil da Faculdade de Enfermagem da Universidade do Estado do Rio de Janeiro, como requisito parcial para aprovação nesta Subárea do Curso de Graduação em Enfermagem.
description: {"references": ["MINIST\u00c9RIO DA SA\u00daDE (BRASIL). Sociedade Brasileira de Pediatria. Golden hour: o que \u00e9 a \"hora dourada\" do parto?. Dispon\u00edvel em: . Acesso em: 04 ago. 2022.", "INSTITUTO NASCER. O que \u00e9 a Golden Hour e por que ela \u00e9 importante?. Dispon\u00edvel em: . Acesso em: 04 ago. 2022.", "INSTITUTO VILLAMIL. Golden hour: a hora de ouro do beb\u00ea. Dispon\u00edvel em: . Acesso em: 04 ago. 2022."]}
title: Great Britain Ministry of Information - Daily Press Notices and Bulletins (1944-05-23)
Creators: name: Great Britain. Ministry Of Information.
Publisher: name: The University of Texas at Austin
Year: 1944
Subjects: subject: World War, 1939-1945 – Social aspects
subject: World War, 1939-1945 -- History
subject: World War II
subject: Second World War
subject: World War Two
subject: Great Britain

description: From the UK National Archives: http://www.nationalarchives.gov.uk/theartofwar/inf3.htm “Formed on September 4th 1939, the day after Britain’s declaration of war, the Ministry of Information (MOI) was the central government department responsible for publicity and propaganda in the Second World War. The initial functions of the MOI were threefold: news and press censorship; home publicity; and oversees publicity in Allied and neutral countries”. This collection contains Press Notices and Bulletins published by the MOI between 1939-1945. The Press Notices and Bulletins are among many publications and films issued by the agency during the war.
Direct control of magnetic chirality in NdMn2O5 by external electric field
Creators: name: Zobkalo, I. A.
name: Matveeva, A. N.
name: Sazonov, A.
name: Barilo, S. N.
name: Shiryaev, S. V.
name: Pedersen, B.
name: Hutanu, V.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Detailed investigation of the incommensurate magnetic ordering in a single crystal of multiferroic NdMn2O5 has been performed using both non-polarized and polarized neutron diffraction techniques. Below TN = 30.5 K magnetic Bragg reflections corresponding to the non-chiral type magnetic structure with propagation vector k1 = (0.5 0 kz1) occurs. Below about 27 K a new distorted magnetic modulation with a similar vector kz2 occurs, which is attributed to the magnetization of the Nd3+ ions by the Mn-sub-lattice. Strong temperature hysteresis in the occurrence of the incommensurate magnetic phases in NdMn2O5 was observed depending on the cooling or heating history of the sample. Below about 20 K the magnetic structure became of a chiral type. From spherical neutron polarimetry measurements, the resulting low-temperature magnetic structure kz3 was approximated by the general elliptic helix. The parameters of the magnetic helix-like ellipticity and helical plane orientation in regard to the crystal structure were determined. A reorientation of the helix occurs at an intermediate temperature between 4 K and 18 K. A difference between the population of right- and left-handed chiral domains of about 0.2 was observed in the as-grown crystal when cooling without an external electric field. The magnetic chiral ratio can be changed by the application of an external electric field of a few kV/cm, revealing strong magnetoelectric coupling. A linear dependence of the magnetic chirality on the applied electric field in NdMn2O5 was found. The results are discussed within the frame of the antisymmetric super-exchange model for Dzyaloshinsky-Moria interaction.
Supplemental Table S5 Grouped Short Chain Fatty Acid and Succinate Producing Bacteria and Short Chain Fatty Acid/Succinate Metabolites in SF versus Control Rats
Creators: name: Maki, Katherine
Publisher: name: figshare
Year: 2020
Subjects: subject: Physiology
subject: FOS: Biological sciences
subject: 60503 Microbial Genetics

description: Grouped Short Chain Fatty Acid and Succinate Producing Bacteria and Short Chain Fatty Acid/Succinate Metabolites in SF versus Control Rats. Response at Baseline, Intervention and Recovery conditions presented.
Field theory on evolving fuzzy two-sphere
Creators: name: Sasakura, Naoki
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: I construct field theory on an evolving fuzzy two-sphere, which is based on the idea of evolving non-commutative worlds of the previous paper. The equations of motion are similar to the one that can be obtained by dropping the time-derivative term of the equation derived some time ago by Banks, Peskin and Susskind for pure-into-mixed-state evolutions. The equations do not contain an explicit time, and therefore follow the spirit of the Wheeler-de Witt equation. The basic properties of field theory such as action, gauge invariance and charge and momentum conservation are studied. The continuum limit of the scalar field theory shows that the background geometry of the corresponding continuum theory is given by ds^2 = -dt^2+ t d Omega^2, which saturates locally the cosmic holographic principle.
description: Typos corrected, minor changes, 23 pages, no figures, LaTeX
Aquaculture in Myanmar: Fish Farm Technology, Production Economics and Management
Creators: name: Belton, Ben
name: Filipski, Mateusz
name: Hu, Chaoran
name: Belton, Ben
name: Filipski, Mateusz
name: Hu, Chaoran
Publisher: name: Unknown
Year: 2017
Subjects: subject: Agricultural and Food Policy
subject: Food Security and Poverty
subject: International Development
subject: Myanmar
subject: fish farm
subject: technology
subject: aquaculture

description: Fish farming (aquaculture) has grown rapidly in Myanmar over the last two decades and plays an increasingly important role in national fish supply, but its technical and economic characteristics have been little studied. Feed the Future Innovation Lab for Food Security Policy (FSP) has conducted the first statistically representative survey of fish farms conducted in Myanmar: the Myanmar AquacultureAgriculture Survey (MAAS). Features analyzed include: farm productivity and profitability; farm size; production cycle duration; use of feed, seed and other production inputs; demand for labor; harvesting and marketing behaviors; technological change; the economic and social characteristics of fish farming households; and land access and tenure.
title: Great Britain Ministry of Information - Daily Press Notices and Bulletins (1944-05-24)
Creators: name: Great Britain. Ministry Of Information.
Publisher: name: The University of Texas at Austin
Year: 1944
Subjects: subject: World War, 1939-1945 – Social aspects
subject: World War, 1939-1945 -- History
subject: World War II
subject: Second World War
subject: World War Two
subject: Great Britain

description: From the UK National Archives: http://www.nationalarchives.gov.uk/theartofwar/inf3.htm “Formed on September 4th 1939, the day after Britain’s declaration of war, the Ministry of Information (MOI) was the central government department responsible for publicity and propaganda in the Second World War. The initial functions of the MOI were threefold: news and press censorship; home publicity; and oversees publicity in Allied and neutral countries”. This collection contains Press Notices and Bulletins published by the MOI between 1939-1945. The Press Notices and Bulletins are among many publications and films issued by the agency during the war.
Reversors and Symmetries for Polynomial Automorphisms of the Plane
Creators: name: Gomez, A.
name: Meiss, J. D.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We obtain normal forms for symmetric and for reversible polynomial automorphisms (polynomial maps that have polynomial inverses) of the plane. Our normal forms are based on the generalized \Henon normal form of Friedland and Milnor. We restrict to the case that the symmetries and reversors are also polynomial automorphisms. We show that each such reversor has finite-order, and that for nontrivial, real maps, the reversor has order 2 or 4. The normal forms are shown to be unique up to finitely many choices. We investigate some of the dynamical consequences of reversibility, especially for the case that the reversor is not an involution.
description: laTeX with 5 figures. Added new sections dealing with symmetries and an extensive discussion of the reversing symmetry groups
Supplemental Table S3 Taxonomic Classification of Microbiome Samples
Creators: name: Maki, Katherine
Publisher: name: figshare
Year: 2020
Subjects: subject: Physiology
subject: FOS: Biological sciences
subject: 60503 Microbial Genetics

description: Taxonomic classification from phylum to species and abundance data (raw counts) of fecal microbiome samples.
Magnetische Charakteristik von Pyroklastika des Ság-hegy Vulkan Komplex, Kleine Ungarische Tiefebene
Creators: name: Dworazik, Nina
name: Auer, Andreas
name: Martin, Ulrike
name: Németh, Károly
name: Wall, Helga De
name: Rolf, Christian
Publisher: name: Universitätsverlag Göttingen
Year: 2006

description: Der Ság-hegy Vulkan Komplex befindet sich in dem Vulkanfeld der Kleinen Ungarischen Tiefebene. Eine 39Ar/40Ar Datierung ergab ein Alter von 5, 42 ± 0, 06Ma für den Ság-hegy (Wijbrans et al. 2004). Die Entwicklung des Vulkans weist zwei verschiedene Ereignisse auf. Als erstes trifft aufsteigendes Magma auf meteorisches Wasser in einer fluviolakustinen Umgebung (fuel-coolant interaction FCI). Die FCI von Wasser bzw. wassergesättigtem Sediment und Magma führte zur Bildung eines phreatomagmatischen Tuffrings. Nachdem das Wasserangebot aufgebraucht war, füllte sich das Innere des Tephrarings mit einem Lavasee. Lokal kollabierte der Tuffring, so dass Lava aus dem See herausfließen konnte. Durch die Anlage eines Steinbruches im zentralen Bereich des Vulkankomplexes ergibt sich ein 3-D Aufschluss mit hervorragenden Einblick auf die Intrusionsbeziehungen von Förderdykes, Sills und Überresten des Lavasees (Martin & Németh, 2004). In dieser Studie sollen die magnetischen Charakteristika einer Sektion von pyroklastischen Gesteinen, die von Dykes und Sills abgeschnitten wird, untersucht werden. Vorläufige Ergebnisse zeigen, dass die magnetische Suszeptibilität aller pyroklastischen Einheiten im Bereich der ferrimagnetischen Suszeptibilität liegt und von (2 − 20 × 10−3 SI variiert...
description: conference
Supplemental Table S4 Differential Abundance of Bacteria at Feature Level
Creators: name: Maki, Katherine
Publisher: name: figshare
Year: 2020
Subjects: subject: Physiology
subject: FOS: Biological sciences
subject: 60503 Microbial Genetics

description: Effect of sleep fragmentation on Gut Microbiota Differential Abundance at feature level.
Skyrme forces with extended density dependence
Creators: name: Cochet, B.
name: Bennaceur, K.
name: Meyer, J.
name: Bonche, P.
name: Duguet, T.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: A generalized parameterization of the Skyrme effective force is discussed. Preliminary results are presented for infinite symmetric and asymmetric nuclear matter. In particular, it is shown that an enlarged density dependence based on two terms allows to choose independently the incompressibility and the isoscalar effective mass.
description: 4 pages, 2 figures, To appear in the proceedings of the "10th Nuclear Physics Conference, Marie and Pierre Curie", Kazimierz Dolny, Poland, 24-28 Sept 2003
Über mathematische Objekte der Geologie
Creators: name: Offhaus, Hans Eckhard
name: Offhaus, Hans Eckhard
Publisher: name: FID GEO
Year: 2020

description: Das Natürlich Geschlossene System (NGS) ist die Abstraktion der Geologie auf ein mathematisches Objekt, das ein lineares Kontinuum der Geologie vollständig durch zwei geometrische Relationen und die arithmetische Relation beschreibt.
description: research
title: Joachim Blankenburg – Träger der C.A. WEBER-Medaille
title: Laudatio anlässlich der Verleihung der C.A. WEBER-Medaille an J. BLANKENBURG während der 21. Jahreshauptversammlung der DGMT am 25. September 2009 in Karlsruhe
titleType: AlternativeTitle
title: Joachim Blankenburg – Recipient of the C.A WEBER-Medal
Creators: name: Caspers, Gerfried
Publisher: name: FID GEO
Year: 2009

description: Die DGMT verleiht die C.A. WEBER-Medaille in diesem Jahr an ihren 2. Vorsitzenden, Dr. JOACHIM BLANKENBURG. Damit setzt die DGMT die Linie fort, auch jüngere, noch im Berufsleben stehende Wissenschaftler mit herausragenden Verdiensten um die Moor- und Torfkunde zu ehren.
description: DFG, SUB Göttingen, DGMT
description: editorial
QED \otimes QCD Threshold Corrections at the LHC
Creators: name: Glosser, C.
name: Jadach, S.
name: Ward, B. F. L.
name: Yost, S. A.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We use the theory of YFS resummation to compute the size of the expected resummed soft radiative threshold effects in precision studies of heavy particle production at the LHC, where accuracies of 1 percent are desired in some processes. We find that the soft QED threshold effects are at the level of 0.3 percent whereas the soft QCD threshold effects enter at the level of 20 percent and hence both must be controlled to be on the conservative side to achieve such goals.
description: 8 pages, no figures; improved text; improved refs. and text
Pedologische Untersuchungen an verschieden genutzten Mooren in Borgarfjördur – West-Island
Pedological field research on cultivated Peatsoils in the Borgarfjördurregion- Westiceland
Creators: name: Blix, Anneke
name: Zeitz, Jutta
Publisher: name: FID GEO
Year: 2009

description: Abstract: Little is known of the characteristics of Icelandic peat soil – one major aspect that is known, though, is that Icelandic peat soil tend to contain high amounts of volcanic ash. The agricultural use of organic soils in Iceland began quite recently relative to other European countries. Pedogenetic changes that have come about through drainage and cultivation have not been investigated as far as possible. Through the investigation of pedogenetic transformations in cultivated peat soils in Westiceland higher degrees of decomposition and textural changes were identified resulting from artificial drainage and aeration. Due to the high amouts of volcanic ash the interpretation and analysis of soil properties like the bulk density or ash contents of the dry matter was rather difficult.
description: Zusammenfassung: Der Wissensstand zu den Moorböden Islands ist gering. Eine bekannte Eigenschaft ist jedoch der außergewöhnlich hohe Gehalt vulkanischer Asche in den Torfen. Die Entwässerung und Nutzung der Moore begann in Island im Vergleich zu anderen Ländern Europas erst spät und die durch Entwässerung und Nutzung hervorgerufenen pedogenetischen Veränderungen sind weitgehend unerforscht. Die Untersuchung entwässerter und verschieden genutzer Moorböden in West Island ergab, dass Gefüge und Zersetzungsgrade der Torfe durch die Entwässerung und Durchlüftung bereits verändert wurden. Aufgrund der hohen Anteile vulkanischer Asche war die Analyse und Interpretation von Rohascheanteilen oder Trockenrohdichten allerdings nur eingeschränkt möglich.
description: DFG, SUB Göttingen, DGMT
description: research
Geometrically Mappable Image Features
Creators: name: Thoma, Janine
name: Paudel, Danda Pani
name: Chhatkuli, Ajad
name: Van Gool, Luc
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Vision-based localization of an agent in a map is an important problem in robotics and computer vision. In that context, localization by learning matchable image features is gaining popularity due to recent advances in machine learning. Features that uniquely describe the visual contents of images have a wide range of applications, including image retrieval and understanding. In this work, we propose a method that learns image features targeted for image-retrieval-based localization. Retrieval-based localization has several benefits, such as easy maintenance and quick computation. However, the state-of-the-art features only provide visual similarity scores which do not explicitly reveal the geometric distance between query and retrieved images. Knowing this distance is highly desirable for accurate localization, especially when the reference images are sparsely distributed in the scene. Therefore, we propose a novel loss function for learning image features which are both visually representative and geometrically relatable. This is achieved by guiding the learning process such that the feature and geometric distances between images are directly proportional. In our experiments we show that our features not only offer significantly better localization accuracy, but also allow to estimate the trajectory of a query sequence in absence of the reference images.
description: Implementation available at https://github.com/janinethoma/geometrically_mappable
3D-Landschaftsmodellierung und Umweltrekonstruktion
3D-Landscape Modeling and Environmental Reconstruction
Creators: name: Bauerochse, Andreas
name: Niemuth, Andreas
Publisher: name: FID GEO
Year: 2012

description: Abstract: In accordance with archaeological investigations conducted after the discovery of an Iron Age bog body, a 3D-landscape model of the Grosse Moor near Uchte (Lower Saxony, Germany) was developed. It shows the extension of the peatland during the middle of the first millenium BC. More than 2750 soil profiles taken during the last 60 years were stratigraphically synchronized and together with about 2500 geodetic points from the surrounding area used for the reconstruction of the Iron Age landscape.
description: Zusammenfassung: Im Kontext mit archäologischen Untersuchungen nach dem Fund einer eisenzeitlichen Moorleiche im Großen Moor bei Uchte (Niedersachsen, Deutschland) wurde ein dreidimensionales Landschaftsmodell des Moores entwickelt, das die Moorausdehnung in der Mitte des ersten vorchristlichen Jahrtausends zeigt. Über 2750 anhand der Moorstratigraphie synchronisierte Torfprofile aus den zurückliegenden 60 Jahren bilden zusammen mit etwa 2500 Höhenpunkten aus dem Moorrandbereich die Basis für die Rekonstruktion der eisenzeitlichen Landschaft.
description: DFG, SUB Göttingen, DGMT
description: research
Quantum coherent spin-electric control in a molecular nanomagnet at clock transitions
Creators: name: Liu, Junjie
name: Mrozek, Jakub
name: Ullah, Aman
name: Duan, Yan
name: Baldoví, José J.
name: Coronado, Eugenio
name: Gaita-Ariño, Alejandro
name: Ardavan, Arzhang
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Chemical Physics (physics.chem-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Electrical control of spins at the nanoscale offers significant architectural advantages in spintronics, because electric fields can be confined over shorter length scales than magnetic fields. Thus, recent demonstrations of electric-field (E-field) sensitivities in molecular spin materials are tantalising, raising the viability of the quantum analogues of macroscopic magneto-electric devices.However, the E-field sensitivities reported so far are rather weak, prompting the question of how to design molecules with stronger spin-electric couplings. Here we show that one path is to identify an energy scale in the spin spectrum that is associated with a structural degree of freedom with a significant electrical polarisability. We study an example of a molecular nanomagnet in which a small structural distortion establishes clock transitions (i.e. transitions whose energy is to first order independent of magnetic field) in the spin spectrum; the fact that this distortion is associated with an electric dipole allows us to control the clock transition energy to an unprecedented degree. We demonstrate coherent electrical control of the quantum spin state and exploit it to manipulate independently the two magnetically-identical but inversion-related molecules in the unit cell of the crystal. Our findings pave the way for the use of molecular spins in quantum technologies and spintronics.
Correlations in Ballistic Processes
Creators: name: Trizac, E.
name: Krapivsky, P. L.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We investigate a class of reaction processes in which particles move ballistically and react upon colliding. We show that correlations between velocities of colliding particles play a crucial role in the long time behavior. In the reaction-controlled limit when particles undergo mostly elastic collisions and therefore are always near equilibrium, the correlations are accounted analytically. For ballistic aggregation, for instance, the density decays as $n\sim t^{-ξ}$ with $ξ=2d/(d+3)$ in the reaction-controlled limit in $d$ dimensions, in contrast with well-known mean-field prediction $ξ=2d/(d+2)$.
description: 4 pages, 1 figure
Random phase vector for calculating the trace of a large matrix
Creators: name: Iitaka, Toshiaki
name: Ebisuzaki, Toshikazu
Publisher: name: arXiv
Year: 2004
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We derive an estimate of statistical error in calculating the trace of a large matrix by using random vector, and show that {\em random phase vector} gives the results with the smallest statistical error for a given basis set. This result supports use of random phase vectors in the calculation of density of states and linear response functions of large quantum systems.
description: 4 pages, RevTex, Further description of real random vectors and self-averaging are added
The impact of the 2015/16 drought on staple maize markets in Southern and Eastern Africa
Creators: name: Meyer, Ferdi
name: Davids, Tracy
name: Mpenda, Zena
name: Popat, Meizal
name: Vilanculos, Orcidia
name: Chisanga, Brian
name: Gitau, Raphael
name: Meyer, Ferdi
name: Davids, Tracy
name: Mpenda, Zena
name: Popat, Meizal
name: Vilanculos, Orcidia
name: Chisanga, Brian
name: Gitau, Raphael
Publisher: name: Unknown
Year: 2017
Subjects: subject: Agricultural and Food Policy
subject: Food Security and Poverty
subject: International Development
subject: southern and eastern Africa
subject: drought
subject: maize
subject: climate change

description: The Southern African region experienced the worst drought in more than a century in the 2015/16 production season, which had a severe impact on staple maize markets. Public and private sector response varied across the region and the level of accuracy on information with respect to crop estimates and the anticipated impact on stock levels, trade flow and prices became critical. To this end, the Regional Network of Agricultural Policy Research Institutes (ReNAPRI) has in recent years developed a multi-faceted approach to policy research that includes farm-level, sector-level and value chain analysis within a Strategic Foresighting frame-work. This initiative is supported by the capacity building and training in partial equilibrium modelling under the Feed the Future Innovation Lab for Food Security Policy (FSP).
Synopsis: Institutions and Public Agricultural Investments: A Qualitative Study of State and Local Government Spending in Nigeria
Synopsis: Institutions and Public Agricultural Investments: A Qualitative Study of State and Local Government Spending in Nigeria
Creators: name: Olofinbiyi, Tolulope
name: Mogues, Tewodaj
name: Olofinbiyi, Tolulope
name: Mogues, Tewodaj
Publisher: name: Unknown
Year: 2017
Subjects: subject: Agricultural and Food Policy
subject: Food Security and Poverty
subject: International Development
subject: Nigeria
subject: government

description: There is a renewed attention to the performance of the agricultural sector in Nigeria given its potential to serve as an engine of pro-poor growth, create jobs, and support economic diversification. Strategies to further transform agriculture need to be accompanied by efficient and effective public expenditures. In addition to analysis of the size and quality of agricultural spending, an understanding of the political-institutional setting within which public spending decisions are made is important. However, there is little known about the policy and political processes through which public agricultural expenditure allocations are decided upon. This policy note synthesizes the findings of an empirical analysis of how the political and budget institutions of the states and Local Government Areas (LGA) of Nigeria affect the incentives of actors involved in the public agricultural finance process, shape the interactions between them, and ultimately influence expenditure allocations.
Agricultural Outlook Forum 2017 Program
Creators: name: United States Department Of Agriculture
name: United States Department Of Agriculture
Publisher: name: Unknown
Year: 2017
Subjects: Agribusiness
Agricultural and Food Policy
Environmental Economics and Policy
Farm Management
Food Consumption/Nutrition/Food Safety
International Relations/Trade

description: USDA’s 93rd Annual Agricultural Outlook Forum A New Horizon: The Future of Agriculture February 23-24, 2017 Crystal Gateway Marriott Hotel Arlington, Virginia www.usda.gov/oce/forum
The Sensitivity of Infall Molecular Line Profiles to the Ambient Radiation Field
Creators: name: Redman, M. P.
name: Rawlings, J. M. C.
name: Yates, J. A.
name: Williams, D. A.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In cold molecular clouds submillimetre emission lines are excited by the ambient radiation field. The pumping is dominated by the cosmic microwave background (CMB). It is usual in molecular line radiative transfer modelling to simply assume that this is the only incident radiation field. In this paper, a molecular line transport code and a dust radiative transfer code are used to explore the effects of the inclusion of a full interstellar radiation field (ISRF) on a simple test molecular cloud. It is found that in many galactic situations, the shape and strength of the line profiles that result are robust to variations in the ISRF and thus that in most cases, it is safe to adopt the CMB radiation field for the molecular line transport calculations. However, we show that in two examples, the inclusion of a plausible radiation field can have a significant effect on the the line profiles. Firstly, in the vicinity of an embedded massive star, there will be an enhanced far infared component to the radiation field. Secondly, for molecular clouds at large redshift, the CMB temperature increases and this of course also alters the radiation field. In both of these cases, the line profiles are weakened significantly compared to a cloud exposed to a standard radiation field. Therefore this effect should be accounted for when investigating prestellar cores in massive star forming regions and when searching for molecular clouds at high redshift.
description: 7 pages, 10 figures, MNRAS accepted
Global Majority E-Journal, vol. 13, no. 2 , December 2022
Creators: name: Gunter, Bernhard
name: Dai, Beining
name: Fox, Ally
name: LeRoy, Eli
name: McGill, Timothy
Publisher: name: American University (Washington, D.C.)
Year: 2023
Subjects: classificationCode: 38
subject: Economics

description: Description to be added
title: The role and impact of investment incentives on small and medium sized enterprise development in Ethiopia
Creators: name: Ayele, Seife
Publisher: name: The Open University
Year: 2003

description: In 1950 Ethiopia became an African pioneer by introducing an industrial modernisation policy to attract foreign capital and technology transfer. It took further pioneering steps in the early 1960s by using its investment incentives scheme to support indigenisation of industry and SMEs. However, during the 1970s and 1980s while many countries were learning fast from the experiences of others, these early initiatives were suppressed in Ethiopia, and only reintroduced in the early 1990s with a narrow approach to enterprise start up, and few lessons learnt. This thesis examines the role and impact of incentives, constituting exemptions from paying duties on imported capital goods and income taxes, on the choices of industry, location and size of enterprises in Ethiopia. It uses theories predicating the reasons for entrepreneurial motivations to start enterprises, and draws on statistics from 4246 projects licensed for investment incentives over 1992-98, as well as new evidence generated from a follow up in-depth investigation of six SMEs. The thesis concludes that the influence of investment incentives on the industry, location and size of SMEs start ups is limited. Antecedent factors like entrepreneurial experience, level of training and financial resources, alongside market and infrastructure were the triggers and determinants of SMEs start ups. However, the study found that sometimes the value of the licence for investment incentives was superior to the holder when used, not as tax breaks as intended, but as a moderator of access to state controlled resources like enterprise sites. Projects that received licences looked viable for bank credit, and the authorities provided some projects with preferential (and subsidised) access to resources. The study suggests that enterprise support initiatives should focus on key driving forces of enterprise development, such as entrepreneurs' technical and managerial skills, better access to land, infrastructure and streamlined procedures for business legalisation.
Jaliscia Mendoza-Garfias & García-Prieto & León 2017
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
Mazocraeidea
Microcotylidae
Jaliscia

description: Jaliscia sp.ǂ
HOSTS. — Actinopterygii (gills).
 GEOGRAPHIC DISTRIBUTION. — Baja California Sur. Canal Cerralvo: Caulolatilus affinis (Pérez-Urbiola 1993, 1995).
 SPECIMENS IN COLLECTIONS. — CPMHN-UABCS; USNM (084761).
REMARK
 These specimens were deposited by Pérez-Urbiola (1993) as holotype and paratypes of “ Jaliscia caulolatili ”, an invalid specific name because not published.
 Magniexcipula lamothei Bravo-Hollis, 1980 (Fig. 5B)
 Magniexcipula lamothei Bravo-Hollis, 1980a: 31.
HOSTS. — Actinopterygii (gills).
 GEOGRAPHIC DISTRIBUTION. — Baja California Sur. Bahía de La Paz: Calamus brachysomus (Bravo-Hollis 1980a); Isla Epíritu Santo: C. brachysomus (Payne 1991).
 Jalisco. Bahía de Chamela: Anisotremus dovii (Mendoza-Garfias & Pérez-Ponce de León 1998; Pérez-Ponce de León et al. 1999).
 Sinaloa. Mazatlán: C. brachysomus (Bravo-Hollis 1985).
 Sonora. Bahía de Guaymas: C. brachysomus (Bravo-Hollis 1980b).
 SPECIMENS IN COLLECTIONS. — CNHE (202, 219, 220, 2668, 2810)(H, P).
NOTE
 The record of this species in Baja California, referred by Kohn et al. (2006), actually corresponds to Baja California Sur (Bravo-Hollis 1980a).
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 pages 554-555, DOI: 10.5252/z2017n4a5, http://zenodo.org/record/4578694
Parallel 3d shape optimization for cellular composites on large distributed-memory clusters
Creators: name: Pinzon, Jose
name: Siebenborn, Martin
name: Vogel, Andreas
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Optimization and Control (math.OC)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Skin modeling is an ongoing research area that highly benefits from modern parallel algorithms. This article aims at applying shape optimization to compute cell size and arrangement for elastic energy minimization of a cellular composite material model for the upper layer of the human skin. A gradient-penalized shape optimization algorithm is employed and tested on the distributed-memory cluster Hazel Hen, HLRS, Germany. The performance of the algorithm is studied in two benchmark tests. First, cell structures are optimized with respect to purely geometric aspects. The model is then extended such that the composite is optimized to withstand applied deformations. In both settings, the algorithm is investigated in terms of weak and strong scalability. The results for the geometric test reflect Kelvin's conjecture that the optimal space-filling design of cells with minimal surface is given by tetrakaidecahedrons. The PDE-constrained test case is chosen in order to demonstrate the influence of the deformation gradient penalization on fine inter-cellular channels in the composite and its influence on the multigrid convergence. A scaling study is presented for up to 12,288 cores and 3 billion DoFs.
Bound state of dimers on a spherical surface
Creators: name: Kostov, M. K.
name: Hernandez, E. S.
name: Cole, M. W.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Condensed Matter (cond-mat)
subject: FOS: Physical sciences

description: The study of particle motion on spherical surfaces is relevant to adsorption on buckyballs and other solid particles. This paper reports results for the binding energy of such dimers, consisting of two light particles (He atoms or hydrogen molecules) constrained to move on a spherical surface. The binding energy reaches a particularly large value when the radius of the sphere is about 3/4 of the particles' diameter.
description: 6 pages, 3 figures, submitted to JLTP, conference proceedings QFS 2003
A class of higher inductive types in Zermelo-Fraenkel set theory
Creators: name: Swan, Andrew
Publisher: name: arXiv
Year: 2020
Subjects: subject: Logic (math.LO)
subject: FOS: Mathematics
subject: 03B38, 03E10

description: We define a class of higher inductive types that can be constructed in the category of sets under the assumptions of Zermelo-Fraenkel set theory without the axiom of choice or the existence of uncountable regular cardinals. This class includes the example of unordered trees of any arity.
Metamicrocotyla chamelense Bravo-Hollis 1983
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
Mazocraeidea
Microcotylidae
Metamicrocotyla
Metamicrocotyla chamelense

description: Metamicrocotyla chamelense Bravo-Hollis, 1983
 Metamicrocotyla chamelense Bravo-Hollis, 1983b: 19.
HOSTS. — Actinopterygii (gills).
 GEOGRAPHIC DISTRIBUTION. — Jalisco. Bahía de Chamela: Mugil cephalus (Bravo-Hollis, 1983b); Mugil curema (Mendoza-Garfias & Pérez-Ponce de León 1998; Pérez-Ponce de León et al. 1999).
 SPECIMENS IN COLLECTIONS. — CNHE (16-17, 2811) (H, P).
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 555, DOI: 10.5252/z2017n4a5, http://zenodo.org/record/4578694
Intrinsic and extrinsic correlations of galaxy shapes and sizes in weak lensing data
Creators: name: Ghosh, Basundhara
name: Durrer, Ruth
name: Schaefer, Bjoern Malte
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The subject of this paper is to build a physical model describing shape and size correlations of galaxies due to weak gravitational lensing and due to direct tidal interaction of elliptical galaxies with gravitational fields sourced by the cosmic large-scale structure. Setting up a linear intrinsic alignment model for elliptical galaxies which parameterises the reaction of the galaxy to an external tidal shear field is controlled by the velocity dispersion, we predict intrinsic correlations and cross-correlations with weak lensing for both shapes and sizes, juxtaposing both types of spectra with lensing. We quantify the observability of the intrinsic shape and size correlations and estimate with the Fisher-formalism how well the alignment parameter can be determined from the Euclid weak lensing survey. Specifically, we find a contamination of the weak lensing convergence spectra with an intrinsic size correlation amounting to up to 10% over a wide multipole range $\ell=100\ldots300$, with a corresponding cross-correlation exhibiting a sign change, similar to the cross-correlation between weak lensing shear and intrinsic shapes. A determination of the alignment parameter yields a precision of a few percent forecasted for Euclid, and we show that all shape and many size correlations should be measurable with Euclid.
description: 16 pages, 6 figures
Metamicrocotyla mugilis Yamaguti 1968
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
Mazocraeidea
Microcotylidae
Metamicrocotyla
Metamicrocotyla mugilis

description: Metamicrocotyla mugilis Yamaguti, 1968
 Metamicrocotyla mugilis Yamaguti, 1968: 141.
HOSTS. — Actinopterygii (gills).
 GEOGRAPHIC DISTRIBUTION. — Sonora. Puerto Peñasco: Mugil cephalus (Bravo-Hollis 1985).
 SPECIMENS IN COLLECTIONS. — CNHE (29).
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 555, DOI: 10.5252/z2017n4a5, http://zenodo.org/record/4578694