cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Magnetic Energy Release, Plasma Dynamics, and Particle Acceleration during Relativistic Turbulent Magnetic Reconnection
Creators: name: Guo, Fan
name: Li, Xiaocan
name: Daughton, William
name: Li, Hui
name: Kilian, Patrick
name: Liu, Yi-Hsin
name: Zhang, Qile
name: Zhang, Haocheng
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: In strongly magnetized astrophysical plasma systems, magnetic reconnection is believed to be a primary process during which explosive energy release and particle acceleration occur, leading to significant high-energy emission. Past years have witnessed active development of kinetic modeling of relativistic magnetic reconnection, supporting this magnetically dominated scenario. A much less explored issue is the consequence of 3D dynamics, where turbulent structures are naturally generated as various types of instabilities develop. This paper presents a series of 3D, fully-kinetic simulations of relativistic turbulent magnetic reconnection (RTMR) in positron-electron plasmas with system domains much larger than kinetic scales. Our simulations start from a force-free current sheet with several different modes of long wavelength magnetic field perturbations, which drive additional turbulence in the reconnection region. Because of this, the current layer breaks up and the reconnection region quickly evolves into a turbulent layer filled with coherent structures such as flux ropes and current sheets. We find that plasma dynamics in RTMR is vastly different from their 2D counterparts in many aspects. The flux ropes evolve rapidly after their generation, and can be completely disrupted due to the secondary kink instability. This turbulent evolution leads to superdiffusion behavior of magnetic field lines as seen in MHD studies of turbulent reconnection. Meanwhile, nonthermal particle acceleration and energy-release time scale can be very fast and do not strongly depend on the turbulence amplitude. The main acceleration mechanism is a Fermi-like acceleration process supported by the motional electric field, whereas the non-ideal electric field acceleration plays a subdominant role. We discuss possible observational implications of 3D RTMR in high-energy astrophysics.
description: 26 pages, 22 figures, ApJ in press
Meizodon coronatus
Creators: name: Segniagbeto, Gabriel Hoinsoude
name: Trape, Jean François
name: David, Patrick
name: Ohler, Annemarie
name: Dubois, Alain
name: Glitho, Isabelle Adolé
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Reptilia
Squamata
Colubridae
Meizodon
Meizodon coronatus

description: Meizodon coronatus (Schlegel, 1837)
MATERIAL EXAMINED. — 7 specimens (MRAC 29718, Evou, near Atakpame; MRAC 29645, Ebeva; MRAC 29593, MRAC 29599 and MRAC 29604, Tetetou; MRAC 29575, Kolokope; GHS-W 1440, Sodo Zion).
MORPHOLOGY. — TL from 170 to 400 mm; 19 MSR, smooth; 169-192 Ven, smooth; 63-74 Sc, paired; anal divided; 8 supralabials; 9 infralabials; 1 preocular; 2 postoculars; temporal scale formula 1 + 2.
 DISTRIBUTION. — This wide ranging species occurs mainly in savannahs throughout the country. It had previously been recorded from Togo by Matschie (1893), Sternfeld (1908b, 1909; from Missahohe, Kete [Kete Kratchi], and Mango), Werner (1929), Hulselmans et al. (1970, 1971; from Tetetou and Kolokope) and by Roman (1984).
description: Published as part of Segniagbeto, Gabriel Hoinsoude, Trape, Jean François, David, Patrick, Ohler, Annemarie, Dubois, Alain & Glitho, Isabelle Adolé, 2011, The snake fauna of Togo: systematics, distribution and biogeography, with remarks on selected taxonomic problems, pp. 325-360 in Zoosystema 33 (3) on page 334, DOI: 10.5252/z2011n3a4, http://zenodo.org/record/4547017
How to get the most from live auto-caption of presentations
Creators: name: Cooke, Michele
name: Caicedo, Ana
Publisher: name: figshare
Year: 2020
Subjects: subject: 200199 Communication and Media Studies not elsewhere classified
subject: FOS: Media and communications
subject: 200102 Communication Technology and Digital Media Studies

description: Description of how to set up powerpoint and google slides to provide live auto-caption
A laser-plasma interaction experiment for solar burst studies
Creators: name: Marquès, J. -R.
name: Briand, C.
name: Amiranoff, F.
name: Depierreux, S.
name: Grech, M.
name: Lancia, L.
name: Pérez, F.
name: Sgattoni, A.
name: Vinci, T.
name: Riconda, C.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: A new experimental platform based on laser-plasma interaction is proposed to explore the fundamental processes of wave coupling at the origin of interplanetary radio emissions. It is applied to the study of electromagnetic (EM) emission at twice the plasma frequency ($2ω_p$) observed during solar bursts and thought to result from the coalescence of two Langmuir waves (LWs). In the interplanetary medium, the first LW is excited by electron beams, while the second is generated by electrostatic decay of Langmuir waves. In the present experiment, instead of an electron beam, an energetic laser propagating through a plasma excites the primary LW, with characteristics close to those at near-Earth orbit. The EM radiation at $2ω_p$ is observed at different angles. Its intensity, spectral evolution and polarization confirm the LW-coalescence scenario.
description: Accepted for publication in Phys. Rev. Lett
Improving the academic workplace for your deaf and hard-of-hearing colleagues
Creators: name: Cooke, Michele
name: Caicedo, Ana
Publisher: name: figshare
Year: 2020
Subjects: subject: Disability Studies
subject: 130312 Special Education and Disability
subject: FOS: Educational sciences

description: This report outlines the best approach for increasing workplace accessibility and provide links to The Mind Hears blog posts that explore particular aspects in detail. The report lists detailed recommendations for making your in-person and remote workplaces accessible for your deaf and hard of hearing colleagues.
Competition between grain growth and grain-size reduction in polar ice
Creators: name: Roessiger, Jens
name: Bons, Paul D.
name: Griera, Albert
name: Jessel, Mark W.
name: Evans, Lynn
name: Montagnat, Maurine
name: Kipfstuhl, Sepp
name: Faria, Sergio H.
name: Weikusat, Ilka
Publisher: name: FID GEO
Year: 2011

description: Static (or ‘normal’) grain growth, i.e. grain boundary migration driven solely by grain boundary energy, is considered to be an important process in polar ice. Many ice-core studies report a continual increase in average grain size with depth in the upper hundreds of metres of ice sheets, while at deeper levels grain size appears to reach a steady state as a consequence of a balance between grain growth and grain-size reduction by dynamic recrystallization. The growth factor k in the normal grain growth law is important for any process where grain growth plays a role, and it is normally assumed to be a temperature-dependent material property. Here we show, using numerical simulations with the program Elle, that the factor k also incorporates the effect of the microstructure on grain growth. For example, a change in grain-size distribution from normal to log-normal in a thin section is found to correspond to an increase in k by a factor of 3.5.
Additional file 2 of Proteomic analysis reveals sex-specific biomarker signature in postural orthostatic tachycardia syndrome
Creators: name: Spahic, Jasmina Medic
name: Ricci, Fabrizio
name: Aung, Nay
name: Hallengren, Erik
name: Axelsson, Jonas
name: Hamrefors, Viktor
name: Melander, Olle
name: Sutton, Richard
name: Fedorowski, Artur
Publisher: name: figshare
Year: 2020
Subjects: subject: Biochemistry
subject: Cell Biology
subject: Neuroscience
subject: Physiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 2: Table S1. Absolute and percentage missingness data. Table S2. Multiplex Cardiovascular Disease Panel: Biomarker List
Exotic Meson Production in the $f_{1}(1285)π^{-}$ System observed in the Reaction $π^{-} p \to ηπ^{+}π^{-}π^{-} p$ at 18 GeV/c
Creators: name: Kuhn, J.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: This letter reports results from the partial wave analysis of the $π^{-}π^{-}π^{+}η$ final state in $π^{-}p$ collisions at 18GeV/c. Strong evidence is observed for production of two mesons with exotic quantum numbers of spin, parity and charge conjugation, $J^{PC} = 1^{-+}$ in the decay channel $f_{1}(1285)π^{-}$. The mass $M = 1709 \pm 24 \pm 41$ MeV/c^2 and width $Γ= 403 \pm 80 \pm 115$ MeV/c^2 of the first state are consistent with the parameters of the previously observed $π_{1}(1600)$. The second resonance with mass $M = 2001 \pm 30 \pm 92$ MeV/c^2 and width $Γ= 333 \pm 52 \pm 49$ MeV/c^2 agrees very well with predictions from theoretical models. In addition, the presence of $π_{2}(1900)$ is confirmed with mass $M = 2003 \pm 88 \pm 148$ MeV/c^2 and width $Γ= 306 \pm 132 \pm 121$ MeV/c^2 and a new state, $a_{1}(2096)$, is observed with mass $M = 2096 \pm 17 \pm 121$ MeV/c^2 and width $Γ= 451 \pm 41 \pm 81$ MeV/c^2. The decay properties of these last two states are consistent with flux tube model predictions for hybrid mesons with non-exotic quantum numbers.
Shining X-rays on asymptotically safe quantum gravity
Creators: name: Zhou, Biao
name: Abdikamalov, Askar B.
name: Ayzenberg, Dimitry
name: Bambi, Cosimo
name: Nampalliwar, Sourabh
name: Tripathi, Ashutosh
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Asymptotically safe quantum gravity is a promising candidate scenario to provide a UV extension for the effective quantum field theory of Einstein's gravity. The theory has its foundations on the very successful framework of quantum field theory, which has been extensively tested for electromagnetic and nuclear interactions. However, observational tests of asymptotically safe quantum gravity are more challenging. Recently, a rotating black hole metric inspired by asymptotically safe quantum gravity has been proposed, and this opens the possibility of astrophysical tests of the theory. In the present paper, we show the capabilities of X-ray reflection spectroscopy to constrain the inverse dimensionless fixed-point value $γ$ from the analysis of a Suzaku observation of the X-ray binary GRS 1915+105. We compare these constraints with those obtained from black hole imaging.
description: 11 pages, 6 figures. v2: refereed version
CTEQ6 Parton Distributions with Heavy Quark Mass Effects
Creators: name: Kretzer, S.
name: Lai, H. L.
name: Olness, F. I.
name: Tung, W. -K.
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Previously published CTEQ6 parton distributions adopt the conventional zero-mass parton scheme; these sets are most appropriate for use with massless hard-scattering matrix elements commonly found in most physics applications. For precision observables which are sensitive to charm and bottom quark mass effects, we provide in this paper an additional CTEQ6HQ parton distribution set determined in the more general variable flavor number scheme which incorporates heavy flavor mass effects. The results are obtained by combining these parton distributions with consistently matched DIS structure functions computed in the same scheme. We describe the analysis procedure, examine the predominant features of the new distributions, and compare with previous distributions.
description: 17 pages, 8 figures
The value of predicted enjoyment : decision making with individuals from East Asian and North American cultural backgrounds
Creators: name: Falk, Carl Francis
Publisher: name: University of British Columbia
Year: 2011

description: In North American culture, research shows that individuals often make decisions based on affective forecasts. In contrast, East Asian cultures often warn against excessive hedonism - instead preferring harmony and balance. We predict that with these individuals, expectations about future positive affect may have less influence on decision making. In Study 1, North American and East Asian participants made a choice between two activities: One framed as enjoyable but not useful, and the other as useful but not enjoyable. In Studies 2 and 3, we measured the relationship between predicted enjoyment and predicted likelihood of taking hypothetical university courses. Our findings suggest that East Asians place less weight on affective forecasts in decision making and this may be due to differences in independent and interdependent self construals. However, our results also suggest that affective forecasts are still important for decision making among those from East Asian cultural backgrounds.
Tuning the magnetism and band topology through antisite defects in Sb doped MnBi4Te7
Creators: name: Hu, Chaowei
name: Lien, Shang-Wei
name: Feng, Erxi
name: Mackey, Scott
name: Tien, Hung-Ju
name: Mazin, Igor I.
name: Cao, Huibo
name: Chang, Tay-Rong
name: Ni, Ni
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The fine control of magnetism and electronic structure is crucial since the interplay between magnetism and band topology can lead to various novel magnetic topological states including axion insulators, magnetic Weyl semimetals and Chern insulators etc. Through crystal growth, transport, thermodynamic, neutron diffraction measurements, we show that with Sb-doping, the newly-discovered intrinsic antiferromagnetic topological insulator MnBi4Te7 evolves from antiferro-magnetic to ferromagnetic and then ferrimagnetic. We attribute this to the formation of Mn(Bi,Sb) antisites upon doping, which result in additional Mn sublattices that modify the delicate interlayer magnetic interactions and cause the dominant Mn sublattice to go from antiferromagnetic to ferro-magnetic. We further investigate the effect of antisites on the band topology using the first-principles calculations. Without considering antisites, the series evolves from antiferromagnetic topological insulator (x = 0) to ferromagnetic axion insulators. In the exaggerated case of 16.7% of periodic antisites, the band topology is modified and type-I magnetic Weyl semimetal phase can be realized at intermediate dopings. Therefore, this doping series provides a fruitful platform with continuously tunable magnetism and topology for investigating emergent phenomena, including quantum anomalous Hall effect, Fermi arc states, etc.
description: Defect analysis and magnetotransport data are added. 6 figs and 2 tables in total
The transpressional connection between Dom Feliciano and Kaoko Belts at 580–550 Ma
Creators: name: Oyhantçabal, Pedro
name: Siegesmund, Siegfried
name: Wemmer, Klaus
name: Passchier, Cees
Publisher: name: Springer-Verlag
Year: 2010

description: A new U–Pb SHRIMP age of 551 ± 4 Ma on a mylonitic porphyry that intruded into the Sierra Ballena Shear Zone (Southernmost Dom Feliciano Belt, Uruguay) and a review of relevant published data make possible a more refined correlation and reconstruction of Brasiliano/Pan-African transpressional events. Paleogeographic reconstruction, kinematics and timing of events indicate a connection between the shear systems of the Dom Feliciano and Kaoko Belts at 580–550 Ma. Sinistral transpression recorded in shear zones accommodates deformation subsequent to collision between the Congo and Río de la Plata Cratons. The correlation is strengthened by the similarity of magmatic and metamorphic ages in the Coastal Terrane of the Kaoko Belt and the Punta del Este Terrane of the Dom Feliciano Belt. This post-collisional sinistral transpression brought these units near to their final position in Gondwana and explains the different evolution at 550–530 Ma. While in the Kaoko Belt, an extensional episode resulted in exhumation as a consequence of collision in the Damara Belt, in the Dom Feliciano Belt, sinistral transpression occurred associated with the closure of the southern Adamastor Ocean due to Kalahari-Río de la Plata collision.
NSBchain: A Secure Blockchain Framework for Network Slicing Brokerage
Creators: name: Zanzi, Lanfranco
name: Albanese, Antonio
name: Sciancalepore, Vincenzo
name: Costa-Perez, Xavier
Publisher: name: arXiv
Year: 2020
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: With the advent of revolutionary technologies, such as virtualization and softwarization, a novel concept for 5G networks and beyond has been unveiled: Network Slicing. Initially driven by the research community, standardization bodies as 3GPP have embraced it as a promising solution to revolutionize the traditional mobile telecommunication market by enabling new business models opportunities. Network Slicing is envisioned to open up the telecom market to new players such as Industry Verticals, e.g. automotive, smart factories, e-health, etc. Given the large number of potential new business players, dubbed as network tenants, novel solutions are required to accommodate their needs in a cost-efficient and secure manner. In this paper, we propose NSBchain, a novel network slicing brokering (NSB) solution, which leverages on the widely adopted Blockchain technology to address the new business models needs beyond traditional network sharing agreements. NSBchain defines a new entity, the Intermediate Broker (IB), which enables Infrastructure Providers (InPs) to allocate network resources to IBs through smart contracts and IBs to assign and re-distribute their resources among tenants in a secure, automated and scalable manner. We conducted an extensive performance evaluation by means of an open-source blockchain platform that proves the feasibility of our proposed framework considering a large number of tenants and two different consensus algorithms.
Discrimination of TiO2 polymorphs in sedimentary and metamorphic rocks
Creators: name: Triebold, Silke
name: Luvizotto, George
name: Tolosana-Delgado, Raimon
name: Zack, Thomas
name: Eynatten, Hilmar
Publisher: name: Springer-Verlag
Year: 2010

description: Investigation by Raman spectroscopy of samples from different geological settings shows that the occurrence of TiO2 polymorphs other than rutile can hardly be predicted, and furthermore, the occurrence of anatase is more widespread than previously thought. Metamorphic pressure and temperature, together with whole rock chemistry, control the occurrence of anatase, whereas variation of mineral assemblage characteristics and/or fluid occurrence or composition takes influence on anatase trace element characteristics and re-equilibration of relict rutiles. Evaluation of trace element contents obtained by electron microprobe in anatase, brookite, and rutile shows that these vary significantly between the three TiO2 phases. Therefore, on the one hand, an appropriation to source rock type according to Nb and Cr contents, but as well application of thermometry on the basis of Zr contents, would lead to erroneous results if no phase specification is done beforehand. For the elements Cr, V, Fe, and Nb, variation between the polymorphs is systematic and can be used for discrimination on the basis of a linear discriminant analysis. Using phase group means and coefficients of linear discriminants obtained from a compilation of analyses from samples with well-defined phase information together with prior probabilities of groupings from a natural sample compilation, one is able to calculate phase grouping probabilities of any TiO2 analysis containing at least the critical elements Cr, V, Fe, and Nb. An application of this calculation shows that for the appropriation to the phase rutile, a correct-classification rate of 99.5% is obtained. Hence, phase specification by trace elements proves to be a valuable tool besides Raman spectroscopy.
The tectonic significance of K/Ar illite fine-fraction ages from the San Luis Formation (Eastern Sierras Pampeanas, Argentina)
Creators: name: Wemmer, Klaus
name: Steenken, André
name: Müller, Stefan
name: Luchi, Mónica
name: Siegesmund, Siegfried
Publisher: name: Springer-Verlag
Year: 2011

description: The Sierra de San Luis forms the southern tip of the Eastern Sierras Pampeanas in central Argentina. Two narrow belts of low-grade phyllites and quartz arenites, i.e. the San Luis Formation, have accommodated part of the strain-related differential exhumation of the medium- to high-grade metamorphic domains that constitute to the basement complex of the sierra. Eleven phyllite samples were subjected to the K/Ar fine-fraction dating technique. Results are interpreted in relation to the Kübler index of the illites, which indicate epimetamorphic conditions for the majority of the samples. Obtained ages between 330 and 290 Ma cover a period of compressional tectonics in the late Mississippian (Visean/Serpukhovian boundary) followed by the subsidence during the formation of the Paganzo Basin in the provinces of La Rioja and San Luis. These tectonic movements are coincident with the Toco orogeny in northern Chile and southern Bolivia. This suggests that the older K/Ar ages document the compressional stage and that younger ages record the cooling of the basement during the subsequent extensional uplift of the basement.
Sharpness of second moment criteria for branching and tree-indexed processes
Creators: name: Pemantle, Robin
Publisher: name: arXiv
Year: 2004
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: A class of branching processes in varying environments is exhibited which become extinct almost surely even though the means M_n grow fast enough so that sum M_n^{-1} is finite. In fact, such a process is constructed for every offspring distribution of infinite variance, and this establishes the converse of a previously known fact: that if a distribution has finite variance then sum M_n^{-1}=infty is equivalent to almost sure extinction. This has as an immediate consequence the converse to a theorem on equipolarity of Galton-Watson trees.
description: 7 pages
Particle Acceleration by MHD Turbulence
Creators: name: Cho, Jungyeon
name: Lazarian, A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Recent advances in understanding of magnetohydrodynamic (MHD) turbulence call for revisions in the picture of particle acceleration. We make use of the recently established scaling of slow and fast MHD modes in strong and weak MHD turbulence to provide a systematic study of particle acceleration in magnetic pressure (low-$β$) and gaseous pressure (high-$β$) dominated plasmas. We consider the acceleration by large scale compressions in both slow and fast particle diffusion limits. We compare the results with the acceleration rate that arises from resonance scattering and Transit-Time Damping (TTD). We establish that fast modes accelerate particles more efficiently than slow modes. We find that particle acceleration by pitch-angle scattering and TTD dominates acceleration by slow or fast modes when the spatial diffusion rate is small. When the rate of spatial diffusion of particles is high, we establish an enhancement of the efficiency of particle acceleration by slow and fast modes in weak turbulence. We show that highly supersonic turbulence is an efficient agent for particle acceleration. We find that even incompressible turbulence can accelerate particles on the scales comparable with the particle mean free path.
description: 17 pages, 4 figures, accepted by ApJ; Some sections re-arranged
Double-heavy tetraquark states with heavy diquark-antiquark symmetry
Creators: name: Cheng, Jian-Bo
name: Li, Shi-Yuan
name: Liu, Yan-Rui
name: Si, Zong-Guo
name: Yao, Tao
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Lattice (hep-lat)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We calculate the masses of the $QQ\bar{q}\bar{q}$ ($Q=c,b$; $q=u,d,s$) tetraquark states with the aid of heavy diquark-antiquark symmetry (HDAS) and the chromomagnetic interaction (CMI) model. The masses of the highest-spin ($J=2$) tetraquarks that have only the $(QQ)_{\bar{3}_c}(\bar{q}\bar{q})_{3_c}$ color structure are related with those of conventional hadrons using HDAS. Thereafter, the masses of their partner states are determined with the mass splittings in the CMI model. Our numerical results reveal that: (i) the lightest $cc\bar{n}\bar{n}$ ($n=u,d$) is an $I(J^P)=0(1^+)$ state around 3929 MeV (53 MeV above the $DD^*$ threshold) and none of the double-charm tetraquarks are stable; (ii) the stable double-bottom tetraquarks are the lowest $0(1^+)$ $bb\bar{n}\bar{n}$ around 10488 MeV ($\approx116$ MeV below the $BB^*$ threshold) and the lowest $1/2(1^+)$ $bb\bar{n}\bar{s}$ around 10671 MeV ($\approx20$ MeV below the $BB_s^*/B_sB^*$ threshold); and (iii) the two lowest $bc\bar{n}\bar{n}$ tetraquarks, namely the lowest $0(0^+)$ around 7167 MeV and the lowest $0(1^+)$ around 7223 MeV, are near-threshold states. Moreover, we discuss the constraints on the masses of double-heavy hadrons. Specifically, for the lowest nonstrange tetraquarks, we obtain $T_{cc}<3965$ MeV, $T_{bb}<10627$ MeV, and $T_{bc}<7199$ MeV.
description: 19 pages, 4 figures, and 11 tables
Petrology, magnetostratigraphy and geochronology of the Miocene volcaniclastic Tepoztlán Formation: implications for the initiation of the Transmexican Volcanic Belt (Central Mexico)
Creators: name: Lenhardt, Nils
name: Böhnel, Harald
name: Wemmer, Klaus
name: Torres-Alvarado, Ignacio
name: Hornung, Jens
name: Hinderer, Matthias
Publisher: name: Springer-Verlag
Year: 2010

description: The volcaniclastic Tepoztlán Formation (TF) represents an important rock record to unravel the early evolution of the Transmexican Volcanic Belt (TMVB). Here, a depositional model together with a chronostratigraphy of this Formation is presented, based on detailed field observations together with new geochronological, paleomagnetic, and petrological data. The TF consists predominantly of deposits from pyroclastic density currents and extensive epiclastic products such as tuffaceous sandstones, conglomerates and breccias, originating from fluvial and mass flow processes, respectively. Within these sediments fall deposits and lavas are sparsely intercalated. The clastic material is almost exclusively of volcanic origin, ranging in composition from andesite to rhyolite. Thick gravity-driven deposits and large-scale alluvial fan environments document the buildup of steep volcanic edifices. K-Ar and Ar-Ar dates, in addition to eight magnetostratigraphic sections and lithological correlations served to construct a chronostratigraphy for the entire Tepoztlán Formation. Correlation of the 577 m composite magnetostratigraphic section with the Cande and Kent (1995) Geomagnetic Polarity Time Scale (GPTS) suggests that this section represents the time intervall 22.8–18.8 Ma (6Bn.1n-5Er; Aquitanian-Burdigalian, Lower Miocene). This correlation implies a deposition of the TF predating the extensive effusive activity in the TMVB at 12 Ma and is therefore interpreted to represent its initial phase with predominantly explosive activity. Additionally, three subdivisions of the TF were established, according to the dominant mode of deposition: (1) the fluvial dominated Malinalco Member (22.8–22.2 Ma), (2) the volcanic dominated San Andrés Member (22.2–21.3 Ma) and (3) the mass flow dominated Tepozteco Member (21.3–18.8 Ma).
Pseudo-effective cones of projective bundles and weak Zariski decomposition
Creators: name: Misra, Snehajit
Publisher: name: arXiv
Year: 2020
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: In this article, we consider the projective bundle $\mathbb{P}_X(E)$ over a smooth complex projective variety $X$, where $E$ is a semistable bundle on $X$ with $c_2(End(E)) =0$. We give a necessary and sufficient condition to get the equality $ Nef^1\bigl(\mathbb{P}_X(E)\bigr) = \overline{Eff}^1\bigl(\mathbb{P}_X(E)\bigr)$ of nef cone and pseudoeffective cone of divisors in $\mathbb{P}_X(E)$. As an application of our result, we show the equality of nef and pseudoeffective cones of divisors of projective bundles over some special varieties. In particular, we show that weak Zariski decomposition exists on these projective bundles. We also show that a semistable bundle $E$ of rank $r \geq 2$ with $c_2\bigl(End(E)\bigr) = 0$ on a smooth complex projective variety of Picard number 1 is $k$-homogeneous i.e. $\overline{Eff}^k\bigl(\mathbb{P}_X(E)\bigr) = Nef^k\bigl(\mathbb{P}_{X}(E)\bigr)$ for all $1 \leq k < r$. Finally, we show that weak Zariski decomposition exists for a fibre product $\mathbb{P}_C(E)\times_C\mathbb{P}(E')$ over a smooth projective curve $C$.
description: Final Version. To appear in European Journal of Mathematics
Being creative in the face of adversity - Annual creativeHE collection 2021
Creators: name: Tasler, Nathalie
name: O'Brien, Rachelle
name: Spiers, Alex
Publisher: name: National Teaching Repository
Year: 2022
Subjects: subject: 130103 Higher Education
subject: FOS: Educational sciences

description: As we are seeing the year out, we are delighted and excited to welcome you to the very first open Annual #creativeHE Collection of 30 diverse contributions from 60 authors, educators and students, across our wider community and practitioners from the United Kingdom, Slovenia, Nigeria, Canada, Italy and Germany that capture creative and resourceful practices during this pandemic year that show the inventiveness and commitment to creating stimulating learning and development opportunities and experiences.
To cite:Tasler, N., O’Brien. R, E. and Spiers, A. (eds) Being creative in the face of adversity. The #creative Annual 2021. Creativity for Learning in Higher Education Community. #creativeHE, https://doi.org/10.25416/NTR.17709860.v4
Characterizing the reactivity of metallic iron in Fe0/UVI/H2O systems by long-term column experiments
Creators: name: Noubactep, C.
Publisher: name: FID GEO
Year: 2011

description: Aqueous iron corrosion has been identified as a powerful process for environmental remediation and safe drinking water provision. The intrinsic reactivity of conventional micro-scale metallic iron (Fe0) has been mostly enhanced by the association of other metals (e.g. Cu, Ni, Pd) or by using nano-scale Fe0. However, the mechanisms responsible for increased reactivity are yet to be univocally elucidated. Therefore, it appears that basic knowledge on Fe0 intrinsic reactivity decreases as Fe0 technology advances. This work was performed to address the intrinsic reactivity of four selected conventional Fe0 materials in long-term column studies. Five systems were investigated. Each system was made up of two columns in series. The first column contains 5.0 g of a U-bearing rock mixed with sand. The second sand column contained 0.0 or 4.0 g of each Fe0. The extent of U fixation in the systems was used to characterize the reactivity of the Fe0 materials. Results showed a clearer differentiation among the three Fe0 materials which exhibited very closed extents of iron dissolution in 2 mM EDTA under dynamic conditions. The crucial importance of long-term column experiments to test the suitability of Fe0 for field applications is delineated. A new research trend is presented.
The suitability of metallic iron for environmental remediation
Creators: name: Noubactep, Chicgoua
Publisher: name: FID GEO
Year: 2009

description: Aqueous contaminant removal in the presence of metallic iron is often regarded as a reductive transformation mediated by the Fe0 surface. However, successful removal of theoretically non-reducible contaminants has been largely reported. This paper presents a rebuttal of the concept of contaminant reductive transformation. It is argued through a careful examination of the evolution of the volume and adsorptive properties of iron and its corrosion products that contaminants are primarily adsorbed and co-precipitated with iron corrosion products. One may wonder how the Fe0 technology will develop with the new concept.
Electrical generation and detection of terahertz signal based on spin-wave emission from ferrimagnets
Creators: name: Zhu, Zhifeng
name: Cai, Kaiming
name: Deng, Jiefang
name: Miriyala, Venkata Pavan Kumar
name: Yang, Hyunsoo
name: Fong, Xuanyao
name: Liang, Gengchiau
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Terahertz (THz) signals, mainly generated by photonic or electronic approaches, are being sought for various applications, whereas the development of magnetic source might be a necessary step to harness the magnetic nature of electromagnetic radiation. We show that the relativistic effect on the current-driven domain-wall motion induces THz spin-wave emission in ferrimagnets. The required current density increases dramatically in materials with strong exchange interaction and rapidly exceeds 1012 A m-2, leading to the device breakdown and thus the lack of experimental evidence. By translating the collective magnetization oscillations into voltage signals, we propose a three-terminal device for the electrical detection of THz spin wave. Through material engineering, wide frequency range from 264 GHz to 1.1 THz and uniform continuous signals with improved output power can be obtained. As a reverse effect, the spin wave generated in this system is able to move ferrimagnetic domain wall. Our work provides guidelines for the experimental verification of THz spin wave, and could stimulate the design of THz spintronic oscillators for wideband applications as well as the all-magnon spintronic devices.
title: The treatment of the aged poor in five selected West Kent parishes from Settlement to Speenhamland (1662-1797)
Creators: name: Barker-Read, Mary
Publisher: name: The Open University
Year: 1989

description: This thesis breaks new ground in Poor Law Studies. It isolates for detailed scrutiny the treatment of a particular social group, the aged poor. Traditional sources have been approached for new answers to new questions, and in so doing, new methods of source exploitation have been evolved and utilised. The sources have been asked to provide information about dependent old age; the relationship between poverty and the length of the working life; sex differences; the proportion of the population which ended life as parish paupers. Key research has centred around the parish pension, its function, size and real value; crucially, the ability or otherwise of the pensioner to subsist on it. Consideration has also been given to the other components of the network of relief measures adopted by the parishes; relief in kind; housing and the standard of living; medical and nursing care; the role of the workhouse. The investigation has been carried beyond the limits of relief provided by the mechanisms of the Old Poor Law alone, to include external supportive agencies, such as the support of family and charity, which includes both charitable trusts and indiscriminate giving. Some light is thrown on ways the aged contributed to their own maintenance. The thesis tests the general hypothesis that all these various supportive systems produced an interlocking apparatus which involved the whole community in the support of the old, while to discuss their treatment within the limits of the poor law only, results in a narrow, incomplete and distorted narrative, serving only to perpetuate the traditional historical view of a harsh, punitive treatment, needing reassessment in the light of recent historical developments.
On near-critical and dynamical percolation in the tree case
Creators: name: Haggstrom, Olle
name: Pemantle, Robin
Publisher: name: arXiv
Year: 2004
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: Consider independent bond percolation with retention probability p on a spherically symmetric tree Gamma. Write theta_Gamma(p) for the probability that the root is in an infinite open cluster, and define the critical value p_c=inf{p:theta_Gamma(p)>0}. If theta_Gamma(p_c)=0, then the root may still percolate in the corresponding dynamical percolation process at the critical value p_c, as demonstrated recently by Haggstrom, Peres and Steif. Here we relate this phenomenon to the near-critical behaviour of theta_Gamma(p) by showing that the root percolates in the dynamical percolation process if and only if int_{p_c}^1 (theta_Gamma(p))^{-1}dp
description: 7 pages
Additional file 2 of Development and external validation of a nomogram to predict overall survival following stereotactic body radiotherapy for early-stage lung cancer
Creators: name: Baker, Sarah
name: Bakunina, Katerina
name: Duijm, Marloes
name: Hoogeman, Mischa S.
name: Cornelissen, Robin
name: Imogeen Antonisse
name: Praag, John
name: Heemsbergen, Wilma D.
name: Nuyttens, Joost Jan
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Biotechnology
subject: 69999 Biological Sciences not elsewhere classified
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Cancer
subject: Plant Biology

description: Additional file 2: Table S2. Results of internal validation of the model building procedure through 1000 bootstrap samples.
Organizational form, prosocial motivation and provision of public services
Creators: name: Vlassopoulos, Michael
Publisher: name: University of British Columbia
Year: 2011

description: This thesis is a collection of three essays that are concerned with the role of organizational form and intrinsic motivation in the delivery of public services. The first essay revisits one of the most influential among the economic theories of nonprofit organizations, the "contractual failures" theory, which argues that consumers perceive nonprofit status--because of the constraint in the distribution of surpluses--as a commitment device, which ensures them against opportunistic behaviour in markets that are characterized by contractual incompleteness in the producer/consumer relationship. This paper questions the robustness of this theory by taking into account the role of reputation. The main result is that when reputations can be sustained, then for-profit status is the preferred organizational form and high quality services are ensured. The second essay provides an explanation for the fact that nonprofit employers are uniquely able to attract volunteers with social concerns and career aspirations and for the related observation that nonprofits figure prominently in mission-related activities. Our theory is predicated on that nonprofit incorporation relaxes the incentive constraint that employers face when implicitly contracting with volunteers. The not-for-profit commitment is shown to be effective only in activities where producers, who can choose to be for-profit or nonprofit, care about the level or quality of the service being provided. Thus, in the equilibrium of the model developed here nonprofit entry in sectors where missions play a defining role and the hiring of volunteers arise endogenously due to economic forces. This equilibrium outcome has some desirable welfare properties. The third essay, co-authored with Patrick Francois, provides a selective overview high-lighting some major themes of the recent literature on the role of intrinsic motivation in the context of the provision of social services. We focus on how the presence of intrinsic motivation affects the design of optimal incentives, the selection of motivated agents, and how prosociality interacts with monetary rewards and organizational form. We also discuss some of the recent literature that addresses issues of organizational design for the provision of public services.
Pfaffian Point Processes from Free Fermion Algebras: Perfectness and Conditional Measures
Creators: name: Koshida, Shinji
Publisher: name: arXiv
Year: 2020
Subjects: subject: Probability (math.PR)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: Operator Algebras (math.OA)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 60G55, 46L53, 46L30

description: The analogy between determinantal point processes (DPPs) and free fermionic calculi is well-known. We point out that, from the perspective of free fermionic algebras, Pfaffian point processes (PfPPs) naturally emerge, and show that a positive contraction acting on a "doubled" one-particle space with an additional structure defines a unique PfPP. Recently, Olshanski inverted the direction from free fermions to DPPs, proposed a scheme to construct a fermionic state from a quasi-invariant probability measure, and introduced the notion of perfectness of a probability measure. We propose a method to check the perfectness and show that Schur measures are perfect as long as they are quasi-invariant under the action of the symmetric group. We also study conditional measures for PfPPs associated with projection operators. Consequently, we show that the conditional measures are again PfPPs associated with projection operators onto subspaces explicitly described.
The bowing potential of granitic rocks: rock fabrics, thermal properties and residual strain
Creators: name: Siegesmund, S.
name: Mosch, S.
name: Scheffzük, Ch.
name: Nikolayev, D.
Publisher: name: Springer-Verlag
Year: 2007

description: The bowing of natural stone panels is especially known for marble slabs. The bowing of granite is mainly known from tombstones in subtropical humid climate. Field inspections in combination with laboratory investigations with respect to the thermal expansion and the bowing potential was performed on two different granitoids (Cezlak granodiorite and Flossenbürg granite) which differ in the composition and rock fabrics. In addition, to describe and explain the effect of bowing of granitoid facade panels, neutron time-of-flight diffraction was applied to determine residual macro- and microstrain. The measurements were combined with investigations of the crystallographic preferred orientation of quartz and biotite. Both samples show a significant bowing as a function of panel thickness and destination temperature. In comparison to marbles the effect of bowing is more pronounced in granitoids at temperatures of 120°C. The bowing as well as the thermal expansion of the Cezlak sample is also anisotropic with respect to the rock fabrics. A quantitative estimate was performed based on the observed textures. The effect of the locked-in stresses may also have a control on the bowing together with the thermal stresses related to the different volume expansion of the rock-forming minerals.
ОПРЕДЕЛЕНИЕ КАЧЕСТВЕННЫХ И КОЛИЧЕСТВЕННЫХ ПОКАЗАТЕЛЕЙ СУХОГО ЭКСТРАКТА РАСТЕНИЯ КИПРЕЯ УЗКОЛИСТНОГО
Creators: name: Юнусова, Х.М.
name: Суннатов, Ш.Х.
Publisher: name: Zenodo
Year: 2025

description: Структурно-механические свойства твердых веществ в основном зависит от их влагосодержанием. Остаточная влажность, влагосорбционные свойства в определенной степени находится от технологических  процессов, которые применяются при их получении. А это в свою очередь влияет технологическим показателям твердых веществ.  В современной фармацевтической науки и отрасли физические и физико-химические методы исследования для целей объективной идентификации лекарственных веществ приобретают все большее значение.  Из физико-химических методов наиболее доступными для внедрения в фармацевтический анализ являются методы, основанные на поглощении излучения. Большую объективность в анализе препаратов позволяет достигнуть спектрофотометрия.
Dolomitic slates from Uruguay: petrophysical and petromechanical characterization and deposit evaluation
Creators: name: Morales Demarco, Manuela
name: Oyhantçabal, Pedro
name: Stein, Karl-Jochen
name: Siegesmund, Siegfried
Publisher: name: Springer-Verlag
Year: 2012

description: Slates are internationally known as roof and façade-cladding material since prehistoric times. The methods required to mine and manufacture these dimensional stones are relatively simple in comparison to those utilized in granitic dimensional stones. This has led to a worldwide rentable commercialization of slate in the last centuries and also to the development of characteristic cultural landscapes. In Uruguay several slates are mined and used in architecture, especially as façade cladding and floor slabs. The most important slates regarding their production and utilization are the dolomitic slates. These dolomitic slates are associated with the Neoproterozoic thrust and fold belt of the Dom Feliciano belt. Representative samples have been geochemically and petrographically characterized, as well as petrophysically and petromechanically analyzed. The petrophysical and petromechanical properties were investigated in a very systematic way with respect to the new European standards, showing values comparable to those registered for internationally known slates. Detailed structural and deposit analysis were carried out in Uruguay in order to evaluate the dolomitic slate deposits. The slates are linked to calc-silicate strata in a greenschist facies volcano-sedimentary sequence and the deposits are located in the limb of a regional fold, where bedding and cleavage are parallel. The main lithotype is a layered and fine-grained dolomitic slate with a quite diverse palette of colors: light and dark green, gray, dark gray, reddish and black. The mined slate is split into slabs 0.5–2 cm thick. In the past, the average production in Uruguay was around 4,000 tons/year and a historical maximum of 13,000 tons was reached in 1993 (Oyhantçabal et al. in Z dt Ges Geowiss 158(3):417–428, 2007). The oscillations in the regional demand were the cause of several flourishing and decay cycles in the activity, but our investigation shows a considerable volume of indicated resources and therefore a very good potential.
Infeasibility and error bound imply finite convergence of alternating projections
Creators: name: Behling, Roger
name: Bello-Cruz, Yunier
name: Santos, Luiz-Rafael
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: 47N10, 49M27, 65K05, 90C25

description: This paper combines two ingredients in order to get a rather surprising result on one of the most studied, elegant and powerful tools for solving convex feasibility problems, the method of alternating projections (MAP). Going back to names such as Kaczmarz and von Neumann, MAP has the ability to track a pair of points realizing minimum distance between two given closed convex sets. Unfortunately, MAP may suffer from arbitrarily slow convergence, and sublinear rates are essentially only surpassed in the presence of some Lipschitzian error bound, which is our first ingredient. The second one is a seemingly unfavorable and unexpected condition, namely, infeasibility. For two non-intersecting closed convex sets satisfying an error bound, we establish finite convergence of MAP. In particular, MAP converges in finitely many steps when applied to a polyhedron and a hyperplane in the case in which they have empty intersection. Moreover, the farther the target sets lie from each other, the fewer are the iterations needed by MAP for finding a best approximation pair. Insightful examples and further theoretical and algorithmic discussions accompany our results, including the investigation of finite termination of other projection methods.