cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Scientific Preparations for Lunar Exploration with the European Lunar Lander
Creators: name: Carpenter, James D.
name: Fisackerly, Richard
name: De Rosa, Diego
name: Houdou, Berengere
Publisher: name: arXiv
Year: 2012
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: This paper discusses the scientific objectives for the ESA Lunar Lander Mission, which emphasise human exploration preparatory science and introduces the model scientific payload considered as part of the on-going mission studies, in advance of a formal instrument selection.
description: Accepted for Publication in Planetary and Space Science 51 pages, 8 figures, 1 table
Overcoming Challenges in Sri Lanka's Spice Industry: A Web Application Solution for Small-Scale Farmers.pdf
Creators: name: Medawatta, Harindu
Publisher: name: figshare
Year: 2023
Subjects: Other information and computing sciences not elsewhere classified
Social and community informatics
Agricultural economics

description: Sri Lanka is renowned for its high-quality spice production, which has a significant impact on the global spice market. However, small-scale farmers face practical challenges, which include high production costs, limited access to international markets, and high margins from intermediaries. This paper proposes a web application as a low-cost solution to these challenges. The proposed application provides a user- friendly platform for growers and sellers to interact, incorporating features regarding quick alerts and order management. By reducing intermediaries, the proposed application aims to increase profits for small-scale farmers and provide better access to international markets. The study suggests that the implementation of the proposed application will enable farmers to obtain fair prices for their produce while reducing transaction costs and increasing market access. This research presents an innovative solution that can potentially revolutionize the spice industry in Sri Lanka, benefiting both farmers and consumers worldwide.
Michalis Tiverios, Vasiliki Misailidou-Despotidou, Eleni Manakidou und Anna Arvanitaki (Herausgeber), Η κεραμική της αρχαϊκης εποχής στο Βόρειο Αιγα- ίο και την περιφέρειά του (700–480 π. χ.)
Creators: name: Eschbach, Norbert
Publisher: name: Bonner Jahrbücher
Year: 2019

description: Bonner Jahrbücher, Bd. 214.2014(2015): Bonner Jahrbücher
Relations between isoscalar charge form factors of two- and three-nucleon systems
Creators: name: Henning, H.
name: Adam Jr., J.
name: Sauer, P.U.
name: Stadler, A.
Publisher: name: College Park, MD : American Physical Society
Year: 1995
Subjects: subject: deuteron tensor polarization
subject: elastic electron scattering
subject: isoscalar trinucleon charge
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Theoretical predictions for the deuteron and the isoscalar trinucleon charge form factors are compared. Correlations between them are found. Linear relations hold for the position of the diffraction minimum and for the position and height of the secondary maximum. The linear relation for the diffraction minimum does not pass through the experimental data.
Short-time asymptotic expansions of semilinear evolution equations
Creators: name: Fahrenwaldt, M.A.
Publisher: name: Cambridge : Cambridge University Press
Year: 2016
Subjects: subject: asymptotic analysis
subject: backward stochastic differential equations
subject: Banach algebras
subject: semilinear equations
subject: Dewey Decimal Classification::500 | Naturwissenschaften::510 | Mathematik

description: We develop an algebraic approach to constructing short-time asymptotic expansions of solutions of a class of abstract semilinear evolution equations. The expansions are typically valid for both the solution of the equation and its gradient. We apply a perturbation approach based on the symbolic calculus of pseudo-differential operators and heat kernel methods. The construction is explicit and can be done to arbitrary order. All results are rigorously formulated in terms of Banach algebras. As an application we obtain a novel approach to finding approximate solutions of Markovian backward stochastic differential equations. © 2016 Royal Society of Edinburgh.
Strong approximation and descent
Creators: name: Derenthal, Ulrich
name: Wei, Dasheng
Publisher: name: Berlin : De Gruyter
Year: 2015
Subjects: subject: algebraic varieties
subject: number fields
subject: quadratic polynomials
subject: Dewey Decimal Classification::500 | Naturwissenschaften::510 | Mathematik

description: We introduce descent methods to the study of strong approximation on algebraic varieties. We apply them to two classes of varieties defined by P(t) = NK/k(z): firstly for quartic extensions of number fields K/k and quadratic polynomials P(t) in one variable, and secondly for k = ℚ, an arbitrary number field K and P(t) a product of linear polynomials over ℚ in at least two variables. Finally, we illustrate that a certain unboundedness condition at archimedean places is necessary for strong approximation. © 2015 De Gruyter.
Vladimir F. Stolba und Eugeny Rogov, Panskoye I 2.
Creators: name: Mehnert, Gundula
Publisher: name: Bonner Jahrbücher
Year: 2019

description: Rezension zu: Vladimir F. Stolba und Eugeny Rogov, Panskoye I 2.
The Necropolis. Archaeological Investigations in
Western Crimea. Verlag Aarhus University Press,
Aarhus 2012. 414 Seiten, 301 Abbildungen, 78 Tafeln,
33 Tabellen.
description: Bonner Jahrbücher, Bd. 214.2014(2015): Bonner Jahrbücher
Catherine Grandjean et Aliki Moustaka (éditeurs), Aux origines de la monnaie fiduciaire
Creators: name: Chameroy, Jérémie
Publisher: name: Bonner Jahrbücher
Year: 2019

description: Rezension zu: Catherine Grandjean et Aliki Moustaka (éditeurs), Aux
origines de la monnaie fiduciaire. Traditions métallurgiques
et innovations numismatiques. Scripta
Antiqua, tome 55. Éditions Ausonius, Bordeaux 2013.
200 pages avec 73 figures et illustrations noir et blanc.
description: Bonner Jahrbücher, Bd. 214.2014(2015): Bonner Jahrbücher
Darja Sterbenc Erker, Religiöse Rollen römischer Frauen in ›griechischen‹ Ritualen
Creators: name: Hänninen, Marja-Leena
Publisher: name: Bonner Jahrbücher
Year: 2019

description: Rezension zu: Darja Sterbenc Erker, Religiöse Rollen römischer
Frauen in ›griechischen‹ Ritualen. Potsdamer Altertumswissenschaftliche
Beiträge, volume 43. Publisher
Franz Steiner, Stuttgart 2013. 310 pages.
description: Bonner Jahrbücher, Bd. 214.2014(2015): Bonner Jahrbücher
Ole Harck, Archäologische Studien zum Judentum in der europäischen Antike und dem zentraleuropäischen Mittelalter
Creators: name: Heszer, Catherine
Publisher: name: Bonner Jahrbücher
Year: 2019

description: Rezension zu: Ole Harck, Archäologische Studien zum Judentum
in der europäischen Antike und dem zentraleuropäischen
Mittelalter. Schriftenreihe der Bet Tfila –
Forschungsstelle für jüdische Architektur in Europa,
Band 7. Verlag Michael Imhof, Petersberg 2014. 649 Seiten,
195 schwarzweiße Abbildungen.
description: Bonner Jahrbücher, Bd. 214.2014(2015): Bonner Jahrbücher
Satellite-derived UV climatology at Escudero station, Antarctic Peninsula
Creators: name: Cordero, Raul R.
name: Damiani, Alessandro
name: Seckmeyer, Gunther
name: Riechelmann, Stefan
name: Labbe, Fernando
name: Laroze, David
name: Garate, Fernanda
Publisher: name: Cambridge : Cambridge University Press
Year: 2013
Subjects: subject: ozone
subject: satellite retrievals
subject: UV irradiance
subject: UV spectroradiometry
subject: words OMI
subject: climatology
subject: EOS
subject: irradiance
subject: optical depth
subject: satellite
subject: summer
subject: Antarctic Peninsula
subject: Antarctica
subject: King George Island
subject: South Shetland Islands
subject: West Antarctica
subject: Dewey Decimal Classification::500 | Naturwissenschaften::550 | Geowissenschaften
subject: Dewey Decimal Classification::500 | Naturwissenschaften::570 | Biowissenschaften, Biologie

description: We have used data from the Ozone Monitoring Instrument (OMI) aboard NASA's Earth Observing System (EOS) Aura satellite over the period 2004-11 to describe the characteristics of surface ultraviolet (UV) irradiance at Escudero Station (62°12′S, 58°57′W). The station is located on King George Island (northern Antarctic Peninsula). Temperatures in summer are frequently above 0°C, and the surrounding ocean is typically ice-free. We found that the UV irradiance at Escudero is driven by the Antarctic ozone hole (which annually in spring leads to significant variations in the ozone) and by clouds (which are more frequent and have a larger optical depth compared with other Antarctic sites). The combined effect of ozone and clouds led to significant variations in the surface UV. The variability (taken as the standard deviation of the UV estimates retrieved from OMI) is typically greater than 30% at Escudero, but may reach values greater than 50% in spring. The consistency of OMI-derived data was checked by using ground-based spectral measurements carried out under controlled conditions in January 2011. © 2013 Antarctic Science Ltd.
Uta Dirschedl, Die griechischen Säulenbasen
Creators: name: Hendrich, Christof
Publisher: name: Bonner Jahrbücher
Year: 2019

description: Rezension zu: Uta Dirschedl, Die griechischen Säulenbasen. Archäologische
Forschungen, Band 28. Verlag Dr. Ludwig Reichert, Wiesbaden 2013. 516 Seiten, 77 Tafeln,
31 Beilagen.
description: Bonner Jahrbücher, Bd. 217.2017(2018): Bonner Jahrbücher
Variational states for the spin-Peierls system
Creators: name: Frahm, Holger
name: Schliemann, John
Publisher: name: College Park (Maryland) : American Physical Society
Year: 1997
Subjects: subject: Haldane-Shastry model
subject: Heisenberg chains
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We introduce a family of Jastrow pair product states for quasi-one-dimensional spin systems. Depending on a parameter they interpolate between the resonating valence-bond ground state of the Haldane-Shastry model describing a spin liquid and the (dimerized) valence-bond solid ground states of the Majumdar-Ghosh spin chain. These states are found to form an excellent basis for variational studies of Heisenberg chains with next-nearest-neighbor interactions and bond alternation as realized in the spin-Peierls system CuGeO3.
Grammatical arealisms across the Danish-German border from a constructional perspective
Creators: name: Höder, Steffen
Publisher: name: Zenodo
Year: 2021
Subjects: subject: https://glottolog.org/resource/languoid/id/stan1295
subject: https://glottolog.org/resource/languoid/id/dani1285

description: German and Danish share a long, complex, and multifaceted history of language
 contact. Besides other contact scenarios, societal as well as widespread individual
 multilingualism has characterised the linguistic situation in the territory of the
 former Duchy of Schleswig (i.e. the northern part of the federal state of
 Schleswig-Holstein in Germany as well as the southernmost part of Jutland in Denmark) from
 the Early Middle Ages until the present day. In structural terms, this contact
 scenario has resulted in a range of areal features that are shared by a number of Danish
 and German varieties spoken in the border region, while diverging markedly from
 other varieties of at least one of the languages. The aim of the present article is
 twofold. Firstly, it discusses selected grammatical arealisms found in dialectal and
 regiolectal varieties within the Danish-German contact zone (e.g. a shall future,
 the use of and words as infinitive markers in German varieties, and possessive
 linking pronouns in Danish dialects). Secondly, it attempts to demonstrate that
 such arealisms can be interpreted and, to some extent, explained within the
 framework of Diasystematic Construction Grammar (DCxG), a usage-based
 constructionist approach to language contact situations that is centred around the idea of
 language-unspecific constructions used in multilingual communities. Even though
 present-day speaker communities in the contact zone might not be equally
 bilingual as, say, their predecessors in the early 19th century, it is argued that the
 reconstruction of common constructions can help to better understand contact-related
 developments that led to the emergence of linguistic areality in the past.
Symmetrical laws of structure of helicoidally-like biopolymers in the framework of algebraic topology. II. α-helix and DNA structures
Creators: name: Samoylovich, M. I.
name: Talis, A. L.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In the framework of algebraic topology the closed sequence of 4-dimensional polyhedra (algebraic polytopes) was defined. This sequence is started by the polytope {240}, discovered by Coxeter, and is determined by the second coordination sphere of 8-dimensional lattice E8. The second polytope of sequence allows to determine a topologically stable rod substructure that appears during multiplication by a non-crystallographic axis 40/11 of the starting union of 4 tetrahedra with common vertex. When positioning the appropriate atoms tin positions of special symmetry of the staring 4 tetrahedra, such helicoid determines an α-helix. The third polytope of sequence allows to determine the helicoidally-like union of rods with 12-fold axis, which can be compare with Z-DNA structures. This model is defined as a local lattice rod packing, contained within a surface of helicoidally similar type, which ensures its topological stability, as well as possibility for it to be transformed into other forms of DNA structures. Formation of such structures corresponds to lifting a configuration degeneracy, and the stability of a state - to existence of a point of bifurcation. Furthermore, in the case of DNA structures, a second "security check" possibly takes place in the form of local lattice (periodic) property using the lattices other than the main ones.
description: 20 pages, 6 figures
Impacts of Pollution: Leaking Septic Tanks on Groundwater Quality in Owerri Southeastern, Nigeria
Creators: name: V. N. Nwugha
name: P. I. Okeke
name: U. R. Emeronye
Publisher: name: Zenodo
Year: 2021
Subjects: Resistivity
concentration
permeability
subsurface
chemical and septic wastes
ground water
pollution

description: Aim: To determine the effects of leaking septic tanks on groundwater quality in Owerri Municipal. Place and Duration of the Study: Department of Geosciences, Federal University of Technology Owerri, and Department of Chemistry, Alvan Ikoku Federal College of Education, Owerri, Imo State, Nigeria, between January 2013 to May 2014. Methodology: Geophysical and geochemical analysis was carried out using chemical and geophysical analyses. Owerri Municipal is located within Longitudes 6o59’E to 7o06’E and Latitudes 5o33’N. It falls within the coastal plains sands. The quality of groundwater was determined by taking samples from three locations namely Amakohia, Naze and Nekede and carrying out physiochemical analysis on each to ascertain the nature of dissolved substances in the groundwater. Also, physiochemical parameters like bulk density, porosity and permeability of the samples were determined. Description of the lithology and aquifer parameters were obtained using vertical electrical sounding method. Results: The density of the samples ranged from 1.49 to 1.98 mg/L, the porosity values are from 0.20 to 0.38 while the permeability varies from 0.053 mg/L to 2.49 mg/L. The chemical analysis revealed that some heavy metals have concentrations above the amount acceptable by WHO standards. Iron 18.6 to 63.9 mg/L, Nickel 7.5 mg/L and Manganese, 0.46 mg/L. The resistivity of the topsoil ranges from 618 Ωm to 3800 Ωm. An average resistivity range of 7500 Ωm exist up to 30 m while a layer of low resistivity indicating clay and clayey sand extends to 60 m at Naze, 60 m at Nekede and 50 m at Amakohia. Beyond these depths, the resistivity is high on the average of 3500 Ωm. Conclusion: The results showed that the subsurface is permeable which implies that traces of heavy metals present in the samples are contained in the leachets from surrounding environments either from septic tanks or from industrial activities on the surface. Groundwater quality can be improved within this environment by recommending boreholes drilled from 70 m where leachet permeability is negligible. The high concentration of some of the heavy metals is suspected to be present in the leachets which could have infiltrated as a result of human deposits and industrial activities within the environment.
A case for FDI in Multi-brand retail in India
Creators: name: Prasad, Jatin
name: Singh, Dr Jyoti
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Finance (q-fin.GN)
subject: FOS: Economics and business

description: India is ranked as the third most attractive nation for retail investment among emerging markets and many MNCs have been looking for the potential benefits to be taken from it. The development of organized retail has the potential of generating employment, improvement in technology, development of real estate etc. On the other hand critics of the FDI feel that allowing FDI would jeopardize the unorganized retail sector and would not only adversely affect the small retailers and consumers but will give rise to monopolies of large corporate houses also, which can adversely affect the pricing and availability of goods. A case for the prospects for the same is discussed in this paper.
description: 5 pages
Spontaneous symmetry breaking in spinor Bose-Einstein condensates
Creators: name: Scherer, M.
name: Lücke, Bernd
name: Peise, J.
name: Topic, O.
name: Gebreyesus, G.
name: Deuretzbacher, Frank
name: Ertmer, Wolfgang
name: Santos, Luis
name: Klempt, Carsten
name: Arlt, Jan J.
Publisher: name: College Park : American Physical Society
Year: 2013
Subjects: subject: Bose-Einstein condensates
subject: Experimental methods
subject: Intuitive understanding
subject: Quantitative agreement
subject: Spinor quantum gas
subject: Spontaneous symmetry breaking
subject: Symmetry-breaking
subject: Trapping potential
subject: vortices
subject: traps
subject: dynamics
subject: phase
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We present an analytical model for the theoretical analysis of spin dynamics and spontaneous symmetry breaking in a spinor Bose-Einstein condensate (BEC). This allows for an excellent intuitive understanding of the processes and provides good quantitative agreement with the experimental results of Scherer et al. [Phys. Rev. Lett. 105, 135302 (2010)]. It is shown that the dynamics of a spinor BEC initially prepared in an unstable Zeeman state m(F) = 0 (vertical bar 0 >) can be understood by approximating the effective trapping potential for the state vertical bar +/- 1 > with a cylindrical box potential. The resonances in the creation efficiency of these atom pairs can be traced back to excitation modes of this confinement. The understanding of these excitation modes allows for a detailed characterization of the symmetry-breaking mechanism, showing how a twofold spontaneous breaking of spatial and spin symmetry can occur. In addition, a detailed account of the experimental methods for the preparation and analysis of spinor quantum gases is given.
Portable X-ray Fluorescence Analysis of Water: Thin Film and Water Thickness Considerations
Creators: name: Kagiliery, Julia
name: Chakraborty, Somsubhra
name: Li, Bin
name: Hull, Michael
name: Weindorf, David
Publisher: name: EQA - International Journal of Environmental Quality
Year: 2021

description: Water is requisite for life and essential for many industries. Increasingly, global water supplies include inorganic contaminants leading to millions of deaths annually. High analytical cost and a lack of field portable methods have stymied the evaluation of contaminated water. By comparison, portable X-ray fluorescence (PXRF) spectrometry has emerged as a method suitable for low cost, rapid analysis for many matrices yet few studies have evaluated liquids via PXRF. Herein, a novel means of assessing PXRF analytical performance for liquid matrices was evaluated on 1,440 samples comprised of three different standards (Pb, Cd, Cr) featuring three different film types (Kapton, Mylar, and Prolene) at five different liquid depths (4.29, 8.59, 17.18, 25.77 and 30.06 mm), and with four different concentrations (1,000, 500, 250, 125 μg/g). To adjust the PXRF values for a liquid matrix, regression models were fitted using PXRF reported values as the predictor and the true standard concentration values as the target. Results indicated that prior to statistical adjustment to PXRF reported values, increased liquid depth as well as Mylar or Kapton film provided optimal predictive accuracy. However, after PXRF adjustment (linear for Cr and Cd, quadratic for Pb), a depth of 4.29 mm and any of the three film types provided quality elemental predictions. After PXRF adjustment, the size of the mean of PXRF difference with the known standard concentration vs. the true standard concentration values became much smaller compared to the prior adjustment difference. Additionally, the size of the difference was usually smaller for the larger depth (25.77 and 30.06 mm).
description: EQA - International Journal of Environmental Quality, Vol. 45 (2021)
Superfield formulation of nonlinear N=4 supermultiplets
Creators: name: Bellucci, Stefano
name: Krivonos, Sergey
name: Lechtenfeld, Olaf
name: Shcherbakov, Andrey
Publisher: name: College Park (Maryland) : American Physical Society
Year: 2008
Subjects: subject: supermultiplets
subject: hypermultiplets
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We propose a unified superfield formulation of N=4 off-shell supermultiplets in one spacetime dimension using the standard N=4 superspace. The main idea of our approach is a gluing together of two linear supermultiplets along their fermions. The functions defining such a gluing obey a system of equations. Each solution of this system provides a new supermultiplet, linear or nonlinear, modulo equivalence transformations. In such a way we reproduce all known linear and nonlinear N=4, d=1 supermultiplets and propose some new ones. Particularly interesting is an explicit construction of nonlinear N=4 hypermultiplets.
The Carnegie Hubble Program: The Leavitt Law at 3.6 and 4.5 micron in the Milky Way
Creators: name: Monson, Andrew J.
name: Freedman, Wendy L.
name: Madore, Barry F.
name: Persson, S. E.
name: Scowcroft, Victoria
name: Seibert, Mark
name: Rigby, Jane R.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The Carnegie Hubble Program (CHP) is designed to calibrate the extragalactic distance scale using data from the post-cryogenic era of the Spitzer Space Telescope. The ultimate goal of the CHP is a systematic improvement in the distance scale leading to a determination of the Hubble Constant to within an accuracy of 2%. This paper focuses on the measurement and calibration of the Galactic Cepheid Period-Luminosity (Leavitt) Relation using the warm Spitzer IRAC 1 and 2 bands at 3.6 and 4.5 μm. We present photometric measurements covering the period range 4 - 70 days for 37 Galactic Cepheids. Data at 24 phase points were collected for each star. Three PL relations of the form M=a(Log(P)-1)+b are derived. The method adopted here takes the slope a to be -3.31, as determined from the Spitzer LMC data of Scowcroft et al. (2012). Using the geometric HST guide-star distances to ten Galactic Cepheids we find a calibrated 3.6 micron PL zero-point of -5.80\pm0.03. Together with our value for the LMC zero-point we determine a reddening-corrected distance modulus of 18.48\pm0.04 mag to the LMC. The mid-IR Period-Color diagram and the [3.6] - [4.5] color variation with phase are interpreted in terms of CO absorption at 4.5 μm. This situation compromises the use of the 4.5 μm data for distance determinations.
description: 49 pages, 13 figures, Accepted for publication in Ap J
Comparison of Kinetics of Cr (III) Ions Removal from Wastewater Using Raw and Activated Montmorillonite Minerals
Creators: name: İrdemez, Şahset
name: Durmuş, Gül
name: Kul, Sinan
name: Ekmekyapar Torun, Fatma
name: Bingül, Züleyha
Publisher: name: EQA - International Journal of Environmental Quality
Year: 2021

description: In this study, kinetics of the removal of Cr (III) from the waters by adsorption have been investigated using montmorillonite natural clay that was obtained from the vicinity of Narman, Erzurum in Turkey. Activation energy, thermodynamic values and adsorption kinetics were determined. In addition, the trials were repeated by subjecting to the same adsorbent activation process. The values ​​found for these two adsorbents were compared. As a result of the experiments, the parameters affecting the adsorption kinetics were examined. It was determined that the adsorption process could be best depicted by pseudo second order reaction kinetics. Using pseudo second order reaction rate constants, ΔH° = -25.791 kJ mol-1 and ΔS° = 106.19 joule mol-1 were calculated for raw adsorbent. For the activated adsorbent, ΔH° = -18,806 kJ mol-1 and ΔS° = 79.37 joule mol-1 were calculated. That ΔG° increases as temperature increases indicates; adsorption is more spontaneous at high temperatures. Negative ΔH° values show that the reaction is exothermic. The positive values of ΔS° indicate increased randomness at the adsorbent/solution interface during the adsorption of chrome.
description: EQA - International Journal of Environmental Quality, Vol. 45 (2021)
Formate modulated solvothermal synthesis of ZIF-8 investigated using time-resolved in situ X-ray diffraction and scanning electron microscopy
Creators: name: Cravillon, Janosch
name: Schröder, Christian A.
name: Bux, Helge
name: Rothkirch, André
name: Caro, Jürgen
name: Wiebcke, Michael
Publisher: name: Cambridge : Royal Society of Chemistry
Year: 2012
Subjects: subject: X-ray diffraction
subject: crystallisation
subject: methanol
subject: 2-methylimidazole
subject: sodium formate
subject: ligand
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: Time-resolved investigations using in situ energy-dispersive X-ray diffraction in tandem with ex situscanning electron microscopy revealed that solvothermal crystallisation of ZIF-8 in methanol solvent and in the presence of sodium formate as a simple monodentate ligand (modulator) is a rapid process yielding big, high-quality single crystals in short time (<4 h). Kinetic analysis of crystallisation curves was performed by applying the Avrami–Erofe'ev and Gualtieri models. The analyses revealed that the weakly basic formate modulator acts as a base in deprotonation equilibria (deprotonation of the bridging 2-methylimidazole ligand) rather than as a competitive ligand in coordination equilibria at the metal (Zn2+) centres. This is in contrast to the coordination modulation function of formate in ZIF-8 synthesis at room temperature. Crystal shape evolves with time in the presence of formate from cubes with truncated edges to rhombic dodecahedra. The latter shape represents most likely the stable equilibrium morphology of ZIF-8.
MPEC 2023-F102 : DAILY ORBIT UPDATE (2023 March 22)
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Few-Body Systems Composed of Heavy Quarks
Creators: name: Li, Ning
name: Sun, Zhi-Feng
name: He, Jun
name: Liu, Xiang
name: Luo, Zhi-Gang
name: Zhu, Shi-Lin
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Within the past ten years many new hadrons states were observed experimentally, some of which do not fit into the conventional quark model. I will talk about the few-body systems composed of heavy quarks, including the charmonium-like states and some loosely bound states.
description: Plenary talk at the 20th International IUPAP Conference on Few-Body Problems in Physics, to appear in Few Body Systems (2013)
Outcome Measurement Set For Shared Decision Making In Rheumatic And Musculoskeletal Conditions: An OMERACT Scoping Review.
Creators: name: LeBlanc-Demers, Juliette
name: Bouchard, Roxanne
name: Dubois, Olivia
name: Dugas, Michele
name: Naye, Florian
name: LeBlanc, Annie
name: Stéfan, Théo
name: April, Karine Toupin
name: Décary, Simon
Publisher: name: Open Science Framework
Year: 2023
Subjects: subject: Medical Specialties
subject: Rheumatology
subject: Musculoskeletal Diseases
subject: Diseases
subject: Medicine and Health Sciences
subject: Measurement instruments
subject: Scoping review
subject: Share decision making
subject: Musculoskeletal conditions
subject: Psychometric properties
subject: Rheumatic conditions

description: This scoping review will map all available measurement instruments used in the SDM literature among people with rheumatic and musculoskeletal conditions to identify candidate instruments that match with the definition of each OMERACT core outcome domains.
Li self-diffusion in lithium niobate single crystals at low temperatures
Creators: name: Rahn, Johanna
name: Hüger, Erwin
name: Dörrer, Lars
name: Ruprecht, Bernhard
name: Heitjans, Paul
name: Schmidt, Harald
Publisher: name: Cambridge : Royal Society of Chemistry
Year: 2012
Subjects: subject: secondary ion mass spectrometry (SIMS)
subject: ocides
subject: impedance spectroscopy
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: Li self-diffusion in Li 2O-deficient LiNbO 3 single crystals is investigated in the temperature range between 423 and 773 K (150-500 °C) by secondary ion mass spectrometry. A thin layer of ion-beam sputtered isotope enriched 6LiNbO 3 was used as a tracer source, which allows one to study pure isotope interdiffusion. The diffusivities can be described by the Arrhenius law with an activation enthalpy of (1.33 ± 0.03) eV, which is in acceptable agreement with the migration energy of a single Li vacancy as determined by ab initio calculations given in the literature. Charge diffusivities as derived from impedance spectroscopy measurements on the same type of samples are identical to the tracer diffusivities within error limits. No indication of the formation of defect-complexes at low temperatures could be found in the diffusion behaviour. © 2012 the Owner Societies.
Outcomes of language contact in New York Hasidic Yiddish
Creators: name: Nove, Chaya R.
Publisher: name: Zenodo
Year: 2021
Subjects: subject: https://glottolog.org/resource/languoid/id/east2295

description: Hasidic Yiddish (HY), brought to the U.S. by post-Holocaust immigrants, is
 currently the native language of five generations of bilingual speakers in New York.
 In this new contact setting, a unified variety is emerging, which has diverged from
 its Eastern European Yiddish parent dialect(s). The present study is a bilingual
 comparison whose aim is to examine, for a subset of HY and English vowels, how early
 HY-English bilinguals organize their phonetic system(s), and to explore the degree
 and direction of cross-linguistic influence. To that end, 24 early HY-English
 bilinguals, eight per generation (starting with Gen2, the children of immigrants), were
 recorded reading monosyllabic HY and English CVC words containing the vowels
 /i, ɪ, u, ʊ, a/ (approximately 100 tokens per speaker, ten of each vowel). Pillai scores
 were calculated for each vowel category by generational group to measure the
 extent of overlap in the category by language. For /u/, Pillai scores were calculated
 separately for the lexical sets TOO and HOOP, reflecting the implicational
 hierarchy attested in North American English in these contexts (Fridland 2008; Hall-Lew
 2009; Labov et al. 2005; Wong 2014). The findings suggest apparent time change be-
 tween Gen2 and Gen3/Gen4 in two areas: 1) spectral overlap of /ɪ/ and /ʊ/ in the two
 languages; and 2) relative advancement of English vs. HY /u/. Specifically, HY and
 English high lax vowels are qualitatively distinct for the oldest generation but show
 greater convergence in the younger generations. Additionally, while Gen2 HOOP
 and TOO both overlap cross-linguistically, English /u/-sets of Gen3 and Gen4 show
 more fronting. The results are interpreted with reference to models of second
 language acquisition, emphasizing how differences in language input might result in
 the acquisition of different systems. This study illustrates how an understanding of
 the dynamic nature of the language systems of individual learners can help explain
 structural change observed in the language of a speech community.
Improvement of hydrothermal stability of zeolitic imidazolate frameworks
Creators: name: Liu, Xinlei
name: Li, Yanshuo
name: Ban, Yujie
name: Peng, Yuan
name: Jin, Hua
name: Bux, Helge
name: Xu, Longya
name: Caro, Jürgen
name: Yang, Weishen
Publisher: name: Cambridge : Royal Society of Chemistry
Year: 2013
Subjects: subject: imidazole derivative
subject: ligand
subject: metal organic framework
subject: nanoparticle
subject: nitrogen
subject: polymer
subject: unclassified drug
subject: water
subject: zeolite
subject: zeolitic imidazolate frameworks
subject: zinc ion
subject: animal shell
subject: article
subject: chemical reaction
subject: comparative study
subject: crystal structure
subject: hydrolysis
subject: hydrophobicity
subject: hydrothermal stability
subject: hydrothermal vent species
subject: physical chemistry
subject: Raman spectrometry
subject: shell ligand exchange reaction
subject: ultraviolet radiation
subject: water content
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: The metal-organic framework ZIF-8, which undergoes hydrolysis under hydrothermal conditions, is endowed with high water-resistance after a shell-ligand-exchange-reaction. The stabilized ZIF-8 retains its structural characteristics with improved application performances in adsorption and membrane separation. © 2013 The Royal Society of Chemistry.
Social Dynamics of Science
Creators: name: Sun, Xiaoling
name: Kaur, Jasleen
name: Milojević, Staša
name: Flammini, Alessandro
name: Menczer, Filippo
Publisher: name: arXiv
Year: 2012
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Digital Libraries (cs.DL)
subject: Social and Information Networks (cs.SI)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: The birth and decline of disciplines are critical to science and society. However, no quantitative model to date allows us to validate competing theories of whether the emergence of scientific disciplines drives or follows the formation of social communities of scholars. Here we propose an agent-based model based on a \emph{social dynamics of science,} in which the evolution of disciplines is guided mainly by the social interactions among scientists. We find that such a social theory can account for a number of stylized facts about the relationships between disciplines, authors, and publications. These results provide strong quantitative support for the key role of social interactions in shaping the dynamics of science. A "science of science" must gauge the role of exogenous events, such as scientific discoveries and technological advances, against this purely social baseline.
Tunable dual-species Bose-Einstein condensates of 39K and 87Rb
Creators: name: Wacker, L.
name: Jørgensen, N.B.
name: Birkmose, D.
name: Horchani, R.
name: Ertmer, Wolfgang
name: Klempt, Carsten
name: Winter, N.
name: Sherson, J.
name: Arlt, Jan J.
Publisher: name: College Park : American Physical Society
Year: 2015
Subjects: subject: Resonance
subject: Rubidium
subject: Statistical mechanics
subject: Bose-Einstein condensates
subject: Feshbach resonances
subject: Opticaltrapping
subject: Precision metrology
subject: Precision spectroscopy
subject: Scattering length
subject: Sympathetic cooling
subject: Transition regions
subject: Bose-Einstein condensation
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We present the production of dual-species Bose-Einstein condensates (BECs) of 39K and 87Rb. Preparation of both species in the |F=1,mF=−1⟩ state enabled us to exploit a total of three Feshbach resonances, which allows for simultaneous Feshbach tuning of the 39K intraspecies and the 39K−87Rb interspecies scattering length. Thus dual-species Bose-Einstein condensates were produced by sympathetic cooling of 39K with 87Rb. A dark spontaneous force optical trap was used for 87Rb to reduce the losses in 39K due to light-assisted collisions in the optical trapping phase, which can be of benefit for other dual-species experiments. The tunability of the scattering length was used to perform precision spectroscopy of the interspecies Feshbach resonance located at 117.56(2) G and to determine the width of the resonance to 1.21(5) G by rethermalization measurements. The transition region from miscible to immiscible dual-species condensates was investigated and the interspecies background scattering length was determined to 28.5a0 using an empirical model. This paves the way for dual-species experiments with 39K and 87Rb BECs ranging from molecular physics to precision metrology.
Die Weibull-Verteilung und das Problem garantierter Mindestlebenssdauern
Creators: name: Rosemann, Harald
Publisher: name: Frankfurt am Main : VDMA Verlag
Year: 2021
Subjects: subject: Weibull Distribution
subject: Minimum Lifetime L_0
subject: Guaranteed Lifetime L_0
subject: Determinacy
subject: Randomness
subject: Weibull Veteilung
subject: Mindestlebensdauer L_0
subject: Garantierte Lebensdauer L_0
subject: Determiniertheit
subject: Zufall
subject: Weibull-Verteilung
subject: Wahrscheinlichkeitsverteilung
subject: Determiniertheit
subject: Stochastik
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: Bei Lebensdauerversuchen wird oft die Weibullverteilung mit drittem Parameter angesetzt. Sie verspricht eine anfänglich absolute Fehlerfreiheit bis t = L_0; diese Zusage kennzeichnet deterministisches Verhalten. Erst im Anschluß an diese erste Phase erlaubt sie zufälliges Versagen; das ist stochastisches Geschehen. Dieses Modell mit zwei aufeinander folgenden Abschnitten von unvereinbar gegensätzlicher Natur paßt nicht zur Vorstellung eines kontinuierlich fortschreitenden Abnutzungs, Ermüdungs oder Verschleißprozesses, solange keine äußeren Einflüsse auf ihn einwirken. An Stelle dieses in sich widersprüchlichen Modells werden Varianten zur Weibullverteilung von durchgängig stochastischer Natur vorgeschlagen und untersucht, die mit verminderter Versagenswahrscheinlichkeit starten, bevor sie zu normalem Weibull-Verhalten übergehen. [Die englische Version dieser Publikation finden sie unter https://doi.org/10.15488/11469]
Heavy metal contamination of cassava (Manihot esculentum) grown on quarry soils in Umunneochi Abia state and its health implications
Creators: name: Ihejirika, Chinedu Emeka
name: Ndubuisi, Evans Chibuzo
name: Njoku, John Didacus
name: Emereibeole, Enos Ihediohamma
name: Ebe, Tochi Ezechi
name: Njoku-Tony, Roseline Feechi
name: Ihejirika, Onyenonachi Charity
name: Imo, Ejeagba Okorie
name: Nwachukwu, Ikenna Ndubuisi
name: Chinakwe, Etienne Chukwuma
name: Uyo, Chijioke Ndukwe
name: Ezikeudu, Chinomso Eric
name: Ursula, Nwaogwugwu Ngozi
Publisher: name: EQA - International Journal of Environmental Quality
Year: 2021

description: Contamination of agricultural soils by quarry activities is posing serious challenges food security in greater parts of the Sub-Saharan Africa. This study determined the heavy metals in soils and cassava (Manihot esculentum) tubers obtained from three different quarry sites in Umunneochi, Abia State Nigeria. Samples of soil and cassava tubers were collected in replicates following the direction of natural drainage, while control samples were obtained against the direction of natural drainage from the quarry pits. Soil and cassava tuber samples were collected and subjected to standard physicochemical analyses. Heavy metal concentration in the quarry soil and cassava tubers varied significantly from the control except for Cd (mg/kg) at P<0.05. All heavy metals identified in the soil were also present in the cassava tuber samples, with Al concentration in the quarry soils correlating positively (0.977**) with that of cassava tubers. The quarry activities contributed to the heavy metal levels of quarry soils and responsible for the accumulation of heavy metals in cassava tubers that could lead to food insecurity and public health concerns. This further brings to fore the challenges and need to review and update mining and quarry regulations in Nigeria.
description: EQA - International Journal of Environmental Quality, Vol. 45 (2021)
Home Gardens Management: Improving Soil Fertility and Total Microbe State (Case on Pacitan District, East Java, Indonesia)
Creators: name: Titik Wijayanti
name: Lestari, Purwaning B.
name: Setiawati, Debi
Publisher: name: EQA - International Journal of Environmental Quality
Year: 2021

description: Research has been carried out to explore the potential for living the biological properties of the soil in three different home gardens systems. The research was conducted in Pacitan Regency, East Java on three home gardens systems namely the active home gardens, the passive home gardens (home gardens with low maintenance), and the critical land home gardens system (degraded land). Each consists of 20 sites. Observations were made on potential hydrogen (pH), organic carbon, organic matter, total N, total P2O5, available P2O5, total K2O, and total microbe. The results showed that the degraded home gardens were on poor soil fertility and total microbe state. Passive home gardens (low maintenance) could improve the quality of soil fertility and total microbe, especially on active management home gardens.
description: EQA - International Journal of Environmental Quality, Vol. 45 (2021)
The Weibull Distribution and the Problem of Guaranteed Minimum Lifetimes
Creators: name: Rosemann, Harald
Publisher: name: Frankfurt am Main : VDMA Verlag
Year: 2021
Subjects: subject: Weibull Distribution
subject: Minimum Lifetime L_0
subject: Guaranteed Lifetime L_0
subject: Determinacy
subject: Randomness
subject: Weibull Veteilung
subject: Mindestlebensdauer L_0
subject: Garantierte Lebensdauer L_0
subject: Determiniertheit
subject: Zufall
subject: Weibull-Verteilung
subject: Wahrscheinlichkeitsverteilung
subject: Determiniertheit
subject: Stochastik
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: For service life tests, a shifted Weibull distribution, also known as the translated or three-parameter Weibull distribution, is commonly used. The shifted Weibull distribution promises completely fault-free operation until time t = L_0, meaning that the process is deterministic in the early stage. Only after this phase does the distribution allow random behavior, i.e. from the time t = L_0 on, the process is stochastic. This model, which is based on two consecutive time periods of quite different nature, is at odds with the idea of a continuously progressing fatigue, wear, or decay process as long as there are no influences from outside. To replace this arguably inconsistent model, variants of the Weibull distribution of purely stochastic nature are proposed and investigated that start with a reduced probability of failure before transitioning to normal Weibull behavior. [The german version of this paper can be found under https://doi.org/10.15488/11468]
Northern German in Southern Africa? On the phonology of Namdeutsch
Creators: name: Stuhl, Britta
name: Zimmer, Christian
Publisher: name: Zenodo
Year: 2021

description: This chapter presents a study on the phonology of Namdeutsch, a variety of
 German spoken in Namibia. Previous literature has called its pronunciation either
 Standard German or Northern German and the aim of this paper is to determine
 whether Namdeutsch does share phonological characteristics with Northern
 German, based on the analysis of two vowel variables and four consonant variables
 that occur in Northern German. The data for this study stems from the Deutsch
 in Namibia corpus. The analysis reveals that, while not all Northern German
 variants are common in Namdeutsch, both vowel features and a consonant feature are
 frequent or very frequent in the data.
The long walk home: India’s migrant labor, livelihood, and lockdown amid COVID-19
Creators: name: Misra, Yagnya Valkya
Publisher: name: figshare
Year: 2021
Subjects: subject: 200101 Communication Studies
subject: FOS: Media and communications
subject: 200199 Communication and Media Studies not elsewhere classified
subject: 160303 Migration
subject: FOS: Sociology
subject: 190301 Journalism Studies

description: Covid-19 has changed the world. With curbs on movement and social distancing the only prevention for the virus, the government-imposed shutdowns around the world drastically reduced the pace of life, bringing transportation and the economy literally to a standstill in many nations. In a country like India with a population of 1.381 billion, it severely exposed the problems of the poor, especially millions of internal migrant workers working primarily in the unorganised sectors as daily wagers with little or no culture of savings. When Covid-19-induced lockdown was announced by the Indian government on March 24, 2020 – factories, construction sites, offices, institutions, organisations and the sort came to a standstill nullifying the migrant labour force’s ability to earn a living and pay bills as they were forced indoors. Then began India’s biggest migration since partition, when millions of these migrant workers based in India’s big cities for employment began their march home – homes, which were hundreds of miles away in distant villages. This manuscript reflects on the issue of this sudden, reverse labour migration (from the cities to the rural hinterlands) in India during Covid-19, trying to demystify the reasons for this exodus.