cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Sequence-to-Sequence Learning for Indonesian Automatic Question Generator
Creators: name: Muis, Ferdiant Joshua
name: Purwarianti, Ayu
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences
subject: I.2.7

description: Automatic question generation is defined as the task of automating the creation of question given a various of textual data. Research in automatic question generator (AQG) has been conducted for more than 10 years, mainly focused on factoid question. In all these studies, the state-of-the-art is attained using sequence-to-sequence approach. However, AQG system for Indonesian has not ever been researched intensely. In this work we construct an Indonesian automatic question generator, adapting the architecture from some previous works. In summary, we used sequence-to-sequence approach using BiGRU, BiLSTM, and Transformer with additional linguistic features, copy mechanism, and coverage mechanism. Since there is no public large dan popular Indonesian dataset for question generation, we translated SQuAD v2.0 factoid question answering dataset, with additional Indonesian TyDiQA dev set for testing. The system achieved BLEU1, BLEU2, BLEU3, BLEU4, and ROUGE-L score at 38,35, 20,96, 10,68, 5,78, and 43,4 for SQuAD, and 39.9, 20.78, 10.26, 6.31, 44.13 for TyDiQA, respectively. The system performed well when the expected answers are named entities and are syntactically close with the context explaining them. Additionally, from native Indonesian perspective, the best questions generated by our best models on their best cases are acceptable and reasonably useful.
description: 6 pages, 4 figures
Re-transcription of Goddard notebook texts
Creators: name: Parker, Verdena
name: Spence, Justin
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: hup

description: Audio file VP-050919-02: Re-transcription and translation of texts transcribed by P.E. Goddard, American Philosophical Society Na20a.2, notebook #10, pp. 131-140.
The stratified disk wind of MCG-03-58-007
Creators: name: Braito, V.
name: Reeves, J. N.
name: Severgnini, P.
name: Della Ceca, R.
name: Ballo, L.
name: Cicone, C.
name: Matzeu, G. A.
name: Serafinelli, R.
name: Sirressi, M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Past Suzaku, XMM and NuSTAR observations of the nearby (z=0.0323) bright Seyfert 2 galaxy MCG-03-58-007 revealed the presence of two deep and blue-shifted Fe K-shell absorption line profiles. These could be explained with the presence of two phases of a highly ionized, high column density accretion disk wind outflowing with $v_{out1}\sim -0.1c$ and $v_{out2}\sim -0.2c$. Here we present two new observations of MCG-03-58-007: one was carried out in 2016 with Chandra and one in 2018 with Swift. Both caught MCG-03-58-007 in a brighter state ($F_{\mathrm{2-10\,keV}}\sim 4\times 10^{-12}$ erg cm$^{-2}$ s$^{-1}$) confirming the presence of the fast disk wind. The multi-epoch observations of MCG-03-58-007 covering the period from 2010 to 2018 were then analysed. These data show that the lower velocity component outflowing with $v_{out1}\sim -0.072\pm 0.002c$ is persistent and detected in all the observations, although it is variable in column density in the range $N_\rm{H}\sim 3-8 \times 10^{23}$cm$^{-2}$. In the 2016 Swift observation we detected again the second faster component outflowing with $v_{out2}\sim -0.2c$, with a column density ($N_\rm{H}=7.0^{+5.6}_{-4.1}\times 10^{23}$cm$^{-2}$), similar to that seen during the Suzaku observation. However during the Chandra observation two years earlier, this zone was not present ($N_\rm{H}<1.5\times 10^{23}$cm$^{-2}$), suggesting that this faster zone is intermittent. Overall the multi-epochs observations show that the disk wind in MCG-03-58-007 is not only powerful, but also extremely variable, hence placing MCG-03-58-007 among unique disk winds such as the one seen in the famous QSO PDS456. One of the main results of this investigation is the consideration that these winds could be extremely variable, sometime appearing and sometime disappearing; thus to reach solid and firm conclusions about their energetics multiple observations are mandatory.
description: 10 pages, 5 figures, 3 tables, accepted by MNRAS
109 new Galactic open clusters
Creators: name: Kharchenko, N. V.
name: Piskunov, A. E.
name: Röser, S.
name: Schilbach, E.
name: Scholz, R. -D.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a list of 130 Galactic Open Clusters, found in the All-Sky Compiled Catalogue of 2.5 Million Stars (ASCC-2.5). For these clusters we determined and publish a homogeneous set of astrophysical parameters such as size, membership, motion, distance and age. In a previous work 520 already known open clusters out of the sample of 1700 clusters from the literature were confirmed in the ASCC-2.5 using independent, objective methods. Using these methods the whole sky was systematically screened for the search of new clusters. The newly detected clusters show the same distribution over the sky as the known ones. It is found, that without the {\em a-priori} knowledge about existing clusters our search lead to clusters which are, {\em on average}, brighter, have more members and cover larger angular radii than the 520 previously known ones.
description: Fig.2 and Fig.3 available as 1013_ASCC_13.jpg and ncomp.jpg, respectively. In fact, during this search of new clusters in the catalogue ASCC-2.5, we discovered 130 clusters. It turned out that 21 of them are listed in the online list DLAM as private communications. We stress the point that this paper is the first presentation of these 21 clusters in a refereed publication. Accepted for publication in A&A
Tensor Networks and Hierarchical Tensors for the Solution of High-dimensional Partial Differential Equations
Creators: name: Bachmayr, Markus
name: Schneider, Reinhold
name: Uschmajew, André
Publisher: name: Technische Universität Berlin
Year: 2015
Subjects: subject: 510 Mathematik
subject: hierarchical tensors
subject: low-rank approximation
subject: high-dimensional partial differential equations

description: Hierarchical tensors can be regarded as a generalisation, preserving many crucial features, of the singular value decomposition to higher-order tensors. For a given tensor product space, a recursive decomposition of the set of coordinates into a dimension tree gives a hierarchy of nested subspaces and corresponding nested bases. The dimensions of these subspaces yield a notion of multilinear rank. This rank tuple, as well as quasi-optimal low-rank approximations by rank truncation, can be obtained by a hierarchical singular value decomposition. For fixed multilinear ranks, the storage and operation complexity of these hierarchical representations scale only linearly in the order of the tensor. As in the matrix case, the set of hierarchical tensors of a given multilinear rank is not a convex set, but forms an open smooth manifold. A number of techniques for the computation of low-rank approximations have been developed, including local optimisation techniques on Riemannian manifolds as well as truncated iteration methods, which can be applied for solving high-dimensional partial differential equations. In a number of important cases, quasi-optimality of approximation ranks and computational complexity have been analysed. This article gives a survey of these developments. We also discuss applications to problems in uncertainty quantification, to the solution of the electronic Schrödinger equation in the strongly correlated regime, and to the computation of metastable states in molecular dynamics.
Finance, Innovation and Emerging Industries – a Review
Creators: name: Dee, N
name: Minshall, T
Publisher: name: Apollo - University of Cambridge Repository
Year: 2011
Subjects: : Industrial emergence, entrepreneurial finance, investment, industry evolution

description: This paper provides a review entrepreneurial finance in emerging industries. First we examined literature to create a view of industrial emergence with reference to systems thinking. We then explored the role of entrepreneurial finance in emerging industries, and whether it can theoretically slow or accelerate industrial emergence through reference to the literature. We find the link between entrepreneurial finance and industrial emergence is not a simple relationship of more finance generates more innovation and industrial emergence.
FACIES ANALYSIS, STRATIGRAPHY AND PALAEONTOLOGY (MOLLUSCS AND VERTEBRATES) IN THE UPPER PLIOCENE SANDY FLOOD-BASIN DEPOSITS OF THE UPPER VALDARNO BASIN (NORTHERN APENNINES)
Creators: name: GHINASSI, MASSIMILIANO
name: ABBAZZI, LAURA
name: ESU, DANIELA
name: GAUDANT, JEAN
name: GIROTTI, ODOARDO
Publisher: name: Università degli Studi di Milano
Year: 2005

description: The Upper Valdarno Basin, one of the most investigated Neogene–Quaternary basins of the Northern Apennines, developed during three main phases, as testified by the occurrence of three unconformity-bounded stratigraphic units (UBSUs) in the basin infill. Despite numerous studies having been carried out, biochronological, paleoecological and stratigraphical issues in the lower portion of the Montevarchi Synthem (second phase) have yet to be understood. Sandy deposits (Montecarlo Sand and Silt Unit), stratigraphically located in this portion of the Montevarchi Synthem, are the focus of this multidisciplinary study. These deposits conformably overlie sandy fluvio-eolian sediments and are, in turn, capped by fluvio-palustrine deposits through a progressive unconformity. Facies analysis suggest a sandy flood-basin environment for these deposits, characterised by variations in water discharge and flood event energy. Mollusc and fish remains, pointing to quiet or slow-moving shallow waters, have been affected by transport processes before final burial in overbank areas. Fish remains of the primary marine family Mugilids highlight a connection between the basin and the sea that was previously only supposed. Small mammal remains, referred to the rodent Mimomys polonicus, are coherent with a water-rich environment. Cyclic variations in shell content and sedimentological characteristics testify to the occurrence of short-term climatic oscillations during this warming phase. This study fits with paleomagnetic and radiometric datings and mammal biochronology, in indicating that the Montecarlo Sand and Silt Unit belongs to a time interval preceding the Reunion paleomagnetic event. The depositional evolution of the Montecarlo Unit was driven by climatic change from arid to humid conditions, related to a global increase in temperature that occurred between 2.4 and 2.2 Ma.
description: Rivista italiana di Paleontologia e Stratigrafia, Vol 111, No 3
SiO emission as a probe of Cloud-Cloud Collisions in Infrared Dark Clouds
Creators: name: Cosentino, G.
name: Jiménez-Serra, I.
name: Henshaw, J. D.
name: Caselli, P.
name: Viti, S.
name: Barnes, A. T.
name: Tan, J. C.
name: Fontani, F.
name: Wu, B.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Infrared Dark Clouds (IRDCs) are very dense and highly extincted regions that host the initial conditions of star and stellar cluster formation. It is crucial to study the kinematics and molecular content of IRDCs to test their formation mechanism and ultimately characterise these initial conditions. We have obtained high-sensitivity Silicon Monoxide, SiO(2-1), emission maps toward the six IRDCs, G018.82$-$00.28, G019.27+00.07, G028.53$-$00.25, G028.67+00.13, G038.95$-$00.47 and G053.11+00.05 (cloud A, B, D, E, I and J, respectively), using the 30-m antenna at the Instituto de Radioastronomía Millimétrica (IRAM30m). We have investigated the SiO spatial distribution and kinematic structure across the six clouds to look for signatures of cloud-cloud collision events that may have formed the IRDCs and triggered star formation within them. Toward clouds A, B, D, I and J we detect spatially compact SiO emission with broad line profiles which are spatially coincident with massive cores. Toward the IRDCs A and I, we report an additional SiO component that shows narrow line profiles and that is widespread across quiescent regions. Finally, we do not detect any significant SiO emission toward cloud E. We suggest that the broad and compact SiO emission detected toward the clouds is likely associated with ongoing star formation activity within the IRDCs. However, the additional narrow and widespread SiO emission detected toward cloud A and I may have originated from the collision between the IRDCs and flows of molecular gas pushed toward the clouds by nearby HII regions.
description: 17 pages, 9 figures
HYSTRIX REFOSSA GERVAIS, 1852 FROM PIRRO NORD (EARLY PLEISTOCENE, SOUTHERN ITALY)
Creators: name: ROOK, LORENZO
name: SARDELLA, RAFFAELE
Publisher: name: Università degli Studi di Milano
Year: 2005

description: We describe fossil remains attributable to genus Hystrix, collected from fissure filings in the area between Apricena and Poggio Imperiale (Apulia, Italy). The vertebrate assemblage that yielded these Hystrix remains is known in the literature as Pirro Nord, and is one of the richest Early Pleistocene mammal assemblages from Italy. The porcupine remains from Pirro Nord are attributed to the species Hystrix refossa. The problem of the taxonomy of Plio-Pleistocene hystricids in the framework of their morphological variability is discussed.
description: Rivista italiana di Paleontologia e Stratigrafia, Vol 111, No 3
Astrometric and photometric monitoring of GQ Lup and its sub-stellar companion
Creators: name: Neuhaeuser, Ralph
name: Mugrauer, Markus
name: Seifahrt, Andreas
name: Schmidt, Tobias
name: Vogt, Nikolaus
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Neuhaeuser et al. (2005) presented direct imaging evidence for a sub-stellar companion to the young T Tauri star GQ Lup. Common proper motion was highly significant, but no orbital motion was detected. Faint luminosity, low gravity, and a late-M/early-L spectral type indicated that the companion is either a planet or a brown dwarf. We have monitored GQ Lup and its companion in order to detect orbital and parallactic motion and variability in its brightness. We also search for closer and fainter companions. We have taken six more images with the VLT Adaptive Optics instrument NACO from May 2005 to Feb 2007, always with the same calibration binary from Hipparcos for both astrometric and photometric calibration. By adding up all the images taken so far, we search for additional companions. The position of GQ Lup A and its companion compared to a nearby non-moving background object varies as expected for parallactic motion by about one pixel (2 πwith parallax π). We could not find evidence for variability of the GQ Lup companion in the K-band (standard deviation being \pm 0.08 mag), which may be due to large error bars. No additional companions are found with deep imaging. There is now exceedingly high significance for common proper motion of GQ Lup A and its companion. In addition, we see for the first time an indication for orbital motion (about 2 to 3 mas/yr decrease in separation, but no significant change in the position angle), consistent with a near edge-on or highly eccentric orbit. We measured the parallax for GQ Lup A to be π= 6.4 \pm 1.9 mas (i.e. 156 \pm 50 pc) and for the GQ Lup companion to be 7.2 \pm 2.1 mas (i.e. 139 \pm 45 pc), both consistent with being in the Lupus I cloud and bound to each other.
description: A&A in press
First Determination of the Distance and Fundamental Properties of an Eclipsing Binary in The Andromeda Galaxy
Creators: name: Ribas, Ignasi
name: Jordi, Carme
name: Vilardell, Francesc
name: Fitzpatrick, Edward L.
name: Hilditch, Ron W.
name: Guinan, Edward F.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the first detailed spectroscopic and photometric analysis of an eclipsing binary in the Andromeda Galaxy (M31). This is a 19.3-mag semi-detached system with components of late-O and early-B spectral types. From the light and radial velocity curves we have carried out an accurate determination of the masses and radii of the components. Their effective temperatures have been estimated from the modeling of the absorption line spectra. The analysis yields an essentially complete picture of the properties of the system, and hence an accurate distance determination to M31. The result is d=772+/-44 kpc ((m-M)_0=24.44+/-0.12 mag). The study of additional systems, currently in progress, should reduce the uncertainty in the M31 distance to better than 5%.
description: 6 pages, 2 figures, accepted for publication in ApJ Letters
The Gluon Exchange Model for diffractive and inelastic collisions
Creators: name: Jeżabek, Marek
name: Rybicki, Andrzej
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We propose a new model for a homogeneous description of hadron-hadron and hadron-nucleus collisions, the Gluon Exchange Model, fundamentally based on color octet (gluon) exchange. In proton-proton collisions we provide an exact description of the final state proton and neutron spectrum including the proton diffractive peak. In proton-nucleus reactions we find that the projectile proton diquark cannot survive in more than about half of multiple proton-nucleon processes and consequently must be very frequently disintegrated, leading to long transfers of baryon number over rapidity space.
description: 10 pages, 4 figures
THE ENDEMIC CANID CYNOTHERIUM (MAMMALIA, CARNIVORA) FROM THE PLEISTOCENE DEPOSITS OF MONTE TUTTAVISTA (NUORO, EASTERN SARDINIA)
Creators: name: ABBAZZI, LAURA
name: ARCA, MARISA
name: TUVERI, CATERINELLA
name: ROOK, LORENZO
Publisher: name: Università degli Studi di Milano
Year: 2005

description: This paper presents the main results related to the analysis of fossils of the endemic Sardinian canid Cynotherium, discovered during the past years within the rich fossiliferous karst deposits in the Monte Tuttavista area (Eastern Sardinia, Nuoro).
The analysis indicates that the remains from various fissure infillings differ in size and dental characters, which are suggestive of evolutionary phases under endemic conditions. The chronological sequencing of fissures obtained based on the evolutionary stage of the fossil canid is consistent with that emerging from the analysis of the whole mammal assemblages occurring in the same fissures. The possible evolutionary relationships of the Sardinian canid to the Plio-Pleistocene mainland species are also considered; a derivation from a population of late Canis arnensis (or Canis mosbachensis) population is supported.
description: Rivista italiana di Paleontologia e Stratigrafia, Vol 111, No 3
Tree-level unitarity constraints in the most general 2HDM
Creators: name: Ginzburg, I. F.
name: Ivanov, I. P.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We obtain tree-level unitarity constraints for the most general Two Higgs Doublet Model (2HDM) with explicit CP-violation. We briefly discuss correspondence between possible violation of tree level unitarity limitation and physical content of the theory.
description: 6 pages, no figures
Contrast and Temperature Dependence of Multi-Epoch High-Resolution Cross-Correlation Exoplanet Spectroscopy
Creators: name: Finnerty, Luke
name: Buzard, Cam
name: Pelletier, Stefan
name: Piskorz, Danielle
name: Lockwood, Alexandra C.
name: Bender, Chad F.
name: Benneke, Björn
name: Blake, Geoffrey A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: While high-resolution cross-correlation spectroscopy (HRCCS) techniques have proven effective at characterizing the atmospheres of transiting and non-transiting hot Jupiters, the limitations of these techniques are not well understood. We present a series of simulations of one HRCCS technique, which combines the cross-correlation functions from multiple epochs, to place temperature and contrast limits on the accessible exoplanet population for the first time. We find that planets approximately Saturn-size and larger within $\sim$0.2 AU of a Sun-like star are likely to be detectable with current instrumentation in the $L$-band, a significant expansion compared with the previously-studied population. Cooler ($ \rm T_{eq} \leq 1000$ K) exoplanets are more detectable than suggested by their photometric contrast alone as a result of chemical changes which increase spectroscopic contrast. The $L$-band CH$_4$ spectrum of cooler exoplanets enables robust constraints on the atmospheric C/O ratio at $\rm T_{eq} \sim 900K$, which have proven difficult to obtain for hot Jupiters. These results suggest that the multi-epoch approach to HRCCS can detect and characterize exoplanet atmospheres throughout the inner regions of Sun-like systems with existing high-resolution spectrographs. We find that many epochs of modest signal-to-noise ($\rm S/N_{epoch} \sim 1500$) yield the clearest detections and constraints on C/O, emphasizing the need for high-precision near-infrared telluric correction with short integration times.
description: 22 pages, 8 figures, accepted to AJ
A review of research on the role and effectiveness of business incubation for technology-based start-ups
Creators: name: Dee, N
name: Gill, D
name: Lacher, R
name: Livesey, TF
name: Minshall, THW
Publisher: name: VU University Press, Amsterdam.
Year: 2013

description: The aim of this paper is to provide an overview of current knowledge on the role and effectiveness of business incubation in supporting the development of new firms with high growth potential. The quantitative and qualitative literature published by the academic and practitioner communities is reviewed. From analysis of this literature, the following conclusions are drawn: • In academic and practitioner publications alike there is widespread definitional and conceptual ambiguity in relation to business incubation. • Given the variety of business incubator strategies, business models, stakeholders, et al., there is no standard measure for assessing incubator performance. The validity, comparability and generalisability of published findings of incubator performance need to be carefully considered. • As the incubation industry has matured so understanding of its core purpose has become more sophisticated. • Research on business incubation needs to be considered in the context of other bodies of knowledge; in particular cluster theory, regional innovation systems, entrepreneurship, investment, and firm growth. These conclusions point to areas of further research including the development of comparable performance indicators – not absolute performance measures – for business incubation; the need to integrate incubation research more effectively within established areas of research; the linking the activities of business incubation to new ventures in emerging industries; and research on the provision of incubation services for device-based or other physical productbased start-ups.
IP strategies and policies for and against evergreening
Creators: name: Granstrand, O
name: Tietze, F
Publisher: name: Apollo - University of Cambridge Repository
Year: 2014
Subjects: Evergreening, intellectual property, patents, Losec, innovation policy

description: Evergreening is the strategic extension of the duration of a temporary monopolistic or market dominant position by means of IP strategies, and in practice patent strategies particularly. This paper explores the evergreening phenomenon. After an introductory description of evergreening and its associated innovation and IP policy issues, the paper provides a literature review. We further present one case of the pharmaceutical blockbuster drug Losec (Omeprazol) that became the world’s best selling drug from 1996 to 2000. The case is accompanied by short evergreeing examples based on other IPRs such as trade marks. A theoretical part discusses different types of evergreening approaches along with simple models. The paper ends with a discussion of implications for managerial counterstrategies and innovation and IP policies.
Populating the Galaxy with low-mass X-ray binaries
Creators: name: Kiel, Paul D.
name: Hurley, Jarrod R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We perform binary population synthesis calculations to investigate the incidence of low-mass X-ray binaries and their birth rate in the Galaxy. We use a binary evolution algorithm that models all the relevant processes including tidal circularization and synchronization. Parameters in the evolution algorithm that are uncertain and may affect X-ray binary formation are allowed to vary during the investigation. We agree with previous studies that under standard assumptions of binary evolution the formation rate and number of black-hole low-mass X-ray binaries predicted by the model are more than an order of magnitude less than what is indicated by observations. We find that the common-envelope process cannot be manipulated to produce significant numbers of black-hole low-mass X-ray binaries. However, by simply reducing the mass-loss rate from helium stars adopted in the standard model, to a rate that agrees with the latest data, we produce a good match to the observations. Including low-mass X-ray binaries that evolve from intermediate-mass systems also leads to favourable results. We stress that constraints on the X-ray binary population provided by observations are used here merely as a guide as surveys suffer from incompleteness and much uncertainty is involved in the interpretation of results.
description: 17 pages and 9 figures; accepted by MNRAS
CAMBRIAN CONODONTS ACROSS THE PRE-FURONGIAN TO FURONGIAN INTERVAL IN THE GSSP SECTION AT PAIBI, HUNAN, SOUTH CHINA
Creators: name: YU-PING, QI
name: BAGNOLI, GABRIELLA
name: ZHI-HAO, WANG
Publisher: name: Università degli Studi di Milano
Year: 2006

description: The conterminant base of the Furongian Series and Paibian Stage (Cambrian), as ratified in 2003, is in dark carbonate slope deposits of the Paibi section, Hunan, China, at the FAD of the agnostid trilobite Glyptagnostus reticulatus. Sampling in the boundary interval reveals 38 taxa of protoconodonts and paraconodonts, including two new species, Prosagittodontus telli and Furnishina miao, and some species in open nomenclature. In the investigated interval, Westergaardodina is a minor component of the conodont associations, whereas Furnishina is common. The interval can be subdivided into two informal assemblages: 1) the Furnishina miao assemblage, which extends from the base of the investigated interval to just below the FAD of G. reticulatus; followed by 2) the Furnishina quadrata¡VFurnishina longibasis assemblage, which extends from just above the FAD of G. reticulatus to the top of the studied interval. The conodont succession correlates with trilobite biozones, and approximately correlates with conodont zones previously recognized in South China and North China. The occurrence of Furnishina longibasis allows long distance correlation because it has a short stratigraphic range and has been reported from Sweden and Poland.
description: Rivista italiana di Paleontologia e Stratigrafia, Vol 112, No 2
Lengths of quasi-commutative pairs of matrices
Creators: name: Guterman, Alexander E.
name: Markova, Olga V.
name: Mehrmann, Volker
Publisher: name: Technische Universität Berlin
Year: 2015
Subjects: subject: 510 Mathematik
subject: finite-dimensional algebras
subject: lengths of sets and algebras
subject: quasi-commuting matrices

description: In this paper we discuss some partial solutions of the length conjecture which describes the length of a generating system for matrix algebras. We consider mainly the algebras generated by two matrices which are quasi-commuting. It is shown that in this case the length function is linearly bounded. We also analyze which particular natural numbers can be realized as the lengths of certain special generating sets and prove that for commuting or product-nilpotent pairs all possible numbers are realizable, however there are non-realizable values between lower and upper bounds for the other quasi-commuting pairs. In conclusion we also present several related open problems.
Deformed Morse-like potential
Creators: name: Assi, I. A.
name: Alhaidari, A. D.
name: Bahlouli, H.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We introduce an exactly solvable one-dimensional potential that supports both bound and/or resonance states. This potential is a generalization of the well-known 1D Morse potential where we introduced a deformation that preserves the finite spectrum property. On the other hand, in the limit of zero deformation, the potential reduces to the exponentially confining potential well introduced recently by A. D. Alhaidari. The latter potential supports infinite spectrum which means that the zero deformation limit is a critical point where our system will transition from the finite spectrum limit to the infinite spectrum limit. We solve the corresponding Schrodinger equation and obtain the energy spectrum and the eigenstates using the tridiagonal representation approach.
description: Interested readers can contact any of the authors for video animations
The GRB of 1999 January 23: prompt emission and broad-band afterglow modeling
Creators: name: Corsi, A.
name: Piro, L.
name: Kuulkers, E.
name: Amati, L.
name: Antonelli, L. A.
name: Costa, E.
name: Feroci, M.
name: Frontera, F.
name: Guidorzi, C.
name: Heise, J.
name: Zand, J. in't
name: Maiorano, E.
name: Montanari, E.
name: Nicastro, L.
name: Pian, E.
name: Soffitta, P.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report on BeppoSAX simultaneous X- and gamma-ray observations of the bright gamma-ray burst (GRB) 990123. We present the broad-band spectrum of the prompt emission, including optical, X- and gamma-rays, confirming the suggestion that the emission mechanisms at low and high frequencies must have different physical origins. We discuss the X-ray afterglow observed by the Narrow Field Instruments (NFIs) on board BeppoSAX and its hard X-ray emission up to 60 keV several hours after the burst, in the framework of the standard fireball model. The effects of including an important contribution of Inverse Compton scattering or modifying the hydrodynamics are studied.
description: 4 pages, 3 figures, minor changes; accepted for publication in Il Nuovo Cimento, proceedings of the 4th Workshop on Gamma-Ray Bursts in the Afterglow Era, Rome,18-22 October 2004. For more details, see astro-ph/0504607 (accepted in A&A)
UPPER DEVONIAN-LOWER CARBONIFEROUS CONODONTS FROM CHIANG DAO CHERTS, NORTHERN THAILAND
Creators: name: RANDON, CARINE
name: WONGANAN, NUTTHAWUT
name: CARIDROIT, MARTIAL
name: PERRET-MIROUSE, MARIE-FRANCE
name: DEGARDIN, JEAN-MARIE
Publisher: name: Università degli Studi di Milano
Year: 2006

description: In Northern Thailand, radiolarites (radiolarian cherts) are very common and their study provides an important tool to understand the regional geology and moreover to localise the suture zone(s). Some of these deep and distal oceanic series yield conodonts which provide to obtain precise age datings. The present work is focused on the Upper Devonian and Lower Carboniferous conodonts from the Chiang Dao area (Chiang Mai province). The conodont faunas from these oceanic cherts display juvenile characters which are interpreted to be a result from a constraining environment.
description: Rivista italiana di Paleontologia e Stratigrafia, Vol 112, No 2
New Models for a Triaxial Milky Way Spheroid and Effect on the Microlensing Optical Depth to the Large Magellanic Cloud
Creators: name: Savage, Christopher
name: Newberg, Heidi Jo
name: Freese, Katherine
name: Gondolo, Paolo
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We obtain models for a triaxial Milky Way spheroid based on data by Newberg and Yanny. The best fits to the data occur for a spheroid center that is shifted by 3kpc from the Galactic Center. We investigate effects of the triaxiality on the microlensing optical depth to the Large Magellanic Cloud (LMC). The optical depth can be used to ascertain the number of Massive Compact Halo Objects (MACHOs); a larger spheroid contribution would imply fewer Halo MACHOs. On the one hand, the triaxiality gives rise to more spheroid mass along the line of sight between us and the LMC and thus a larger optical depth. However, shifting the spheroid center leads to an effect that goes in the other direction: the best fit to the spheroid center is_away_ from the line of sight to the LMC. As a consequence, these two effects tend to cancel so that the change in optical depth due to the Newberg/Yanny triaxial halo is at most 50%. After subtracting the spheroid contribution in the four models we consider, the MACHO contribution (central value) to the mass of the Galactic Halo varies from \~(8-20)% if all excess lensing events observed by the MACHO collaboration are assumed to be due to MACHOs. Here the maximum is due to the original MACHO collaboration results and the minimum is consistent with 0% at the 1 sigma error level in the data.
description: 26 pages, 2 figures. v2: minor revisions. v3: expanded discussion of the local spheroid density and minor revisions to match version published in Journal of Cosmology and Astroparticle Physics (JCAP)
Smooth time optimal trajectory planning for industrial manipulators
Creators: name: Constantinescu, Daniela
Publisher: name: University of British Columbia
Year: 2009

description: This work proposes and demonstrates a strategy for planning smooth path-constrained time-optimal trajectories for manipulators. Such trajectories are obtained by limiting the actuator jerks required by the planned motion. Existing planning strategies incorporate the smoothness requirement either as smoothness of the actuator torques or as smoothness of the joint trajectories. The smoothness requirement is desirable for reducing strain on robot actuators while still requiring low cycle times. In this work, the trajectory smoothness is defined in the phase plane and the planning observes the limits on the actuator jerks. The solution proposed for determining the optimal trajectories consists of approximating the time optimal control problem by a nonlinear parameter optimization problem which is solved using the flexible tolerance method. It is shown that the approximate solution converges to the time optimal motion when the actuator jerks become very high. A number of simulations are performed to demonstrate the proposed strategy. These simulations show that actuator jerk limits have a negative impact on robot motion time, but they do not give any indication about robot trajectory feasibility. This aspect is studied through further simulations and experiments on an industrial robot. The results of this work show that the tracking accuracy is directly related to the actuator jerk limits. Therefore, it is necessary to impose such limits when planning feasible optimal trajectories. Finally, the performance of the smooth time optimal motion is compared to the performance of both the non-jerk limited optimal trajectory, as well as a smooth quintic trajectory. For similar actuator jerks and controller effort, the smooth path-constrained time-optimal trajectory results in a significantly shorter motion time with nearly the same tracking accuracy as a quintic polynomial. Based on the results in this work, actuator jerk limits are shown to provide an improved method of achieving a compromise between high tracking accuracy, smooth joint behaviour, and optimal motion time.
Towards a multidimensional valuation model
Creators: name: Robinson-Garcia, Nicolas
name: Costas, Rodrigo
name: van Leeuwen, Thed N.
name: Nane, Tina
Publisher: name: Zenodo
Year: 2019
Subjects: research evaluation
research careers
ecosystem of science
research profiles
scientists

description: The use of scientometric indicators for individual research assessment has been severely criticized over the years due to their limited capacity to discriminate between different scientists and capture differences in a statistically reliable manner. Nevertheless, science managers and policy makers make use of these indicators for recruitment of scholars, promotion or allocation of funds. This has provoked strong reactions from the academic community. We argue that the greatest threat of the current use of bibliometric indicators for the assessment of scientists goes beyond technical or methodological decisions, and is more related to the irreflexive use of metrics at the individual level. By linking with the current literature and our own experience on conducting research evaluation, we here present a tentative valuation model which tries to balance between a conceptually-informed framework and a methodological viable operationalization. The model is designed so that it can be operationalized by making use of bibliometric indicators, although we acknowledge that it is sufficiently broad as to give room to non-bibliometric indicators.
description: Poster presented at the ISSI/STI 2019 Conference held in Rome Sept 2-5.
A Theory of Scalar Mesons
Creators: name: Hooft, G. 't
name: Isidori, G.
name: Maiani, L.
name: Polosa, A. D.
name: Riquer, V.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We discuss the effect of the instanton induced, six-fermion effective Lagrangian on the decays of the lightest scalar mesons in the diquark--antidiquark picture. This addition allows for a remarkably good description of light scalar meson decays. The same effective Lagrangian produces a mixing of the lightest scalars with the positive parity q-qbar states. Comparing with previous work where the q-qbar mesons are identified with the nonet at 1200-1700 MeV, we find that the mixing required to fit the mass spectrum is in good agreement with the instanton coupling obtained from light scalar decays. A coherent picture of scalar mesons as a mixture of tetraquark states (dominating in the lightest mesons) and heavy q-qbar states (dominating in the heavier mesons) emerges.
description: 10 pages, 2 figures. References added. Presentation improved. Unchanged in substance. To appear in Phys Lett B
Testing clockwork axion with gravitational waves
Creators: name: Chiang, Cheng-Wei
name: Lu, Bo-Qiang
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We investigate the gravitational waves (GWs) produced from the Peccei-Quinn (PQ) phase transition associated with the clockwork axion. The PQ phase transition can be first-order when the dimension-6 operator is included into the scalar potential. The GWs from the PQ phase transition at scale in the range of $10^3-10^6$ GeV are detectable for the BBO and ALIA interferometers. The LISA and Taiji interferometers can probe the GWs from the PQ scale $f\lesssim 10^4$ GeV, while the GW signals from the scale $f\gtrsim 10^5$ GeV can be detected by the ground-based GW observatories ET and CE. We find that the parameter space $κ_m\sim 0.06-0.001$, $κ_l\sim 0.04-0.001$, and $\varepsilon\sim 0.1-0.01$ at the scale $f=10^5$ GeV and most of the parameter regions at the scale $f=10^6$ GeV have been excluded by the LIGO O2 run. The LIGO O3 and design phases can further probe the remaining parameter space. We show that the GWs from the annihilation of domain walls with a PQ scale $f\simeq 2\times 10^5$ GeV can induce the stochastic signals indicated by the 12.5-year observation of NANOGrav. The LIGO O3 run has the opportunity of detecting the GW signals from the first-order PQ phase transition around this scale.
description: 29 pages, 10 figures, 1 table, comments are welcome
A NEW SAUROPTERYGIAN REPTILE WITH PLESIOSAURIAN AFFINITY FROM THE LATE TRIASSIC OF ITALY
Creators: name: M. DALLA VECCHIA, FABIO
Publisher: name: Università degli Studi di Milano
Year: 2006

description: Bobosaurus forojuliensis, gen. et sp. nov., is a large sauropterygian from the Alpine Late Triassic (Early Carnian, northeastern Italy). The holotype is a moderately disarticulated skeleton consisting of the tip of the rostrum, part of the neck (including the atlas-axis complex), the trunk, most of the tail, parts of the limbs, and the pelvic girdle. The new taxon is characterized by a mosaic of "nothosaurian" and "plesiosaurian" features. It exhibits characters that were previously considered autapomorphies of different sauropterygian taxa. Dorsal neural spines are very high as in Nothosaurus mirabilis, and each dorsal rib has a distinct uncinate process, a diagnostic feature of the placodont Paraplacodus. The atlas-axis complex has the plesiosaurian pattern but is peculiar in several details. The neural spines of the anterior cervicals have an arched anterior margin. The spade-shaped pubis lacks an obturator foramen and an articulation with the ilium, and is associated with a stout, "hourglass-shaped" ilium that has a twisted shaft. Apomorphic characters include: cervical centra higher than wide and "pear-shaped" in anteroposterior view, a peculiar zygapophyseal articulation of pectoral to "caudal" vertebrae like that found in the dorsal vertebrae of Simosaurus, but with a reversed anteroposterior polarity, high neural spines on all vertebrae, neural spine of "sacral" to mid-caudal vertebrae with a bottle-shaped profile in lateral view, peculiar mid-posterior cervical ribs, lightened skeleton, and a comparatively large humerus. The new taxon was a specialized surface swimmer with a stiffened trunk and large forelimbs. It represents one of very few Late Triassic eusauropterygian taxa. It is probably a pistosaurid or, alternatively, could represent a different clade closer to Plesiosauria, occurring in the gap between the late Anisian pistosaurids and the earliest Rhaetian plesiosaurs.
description: Rivista italiana di Paleontologia e Stratigrafia, Vol 112, No 2
THE ROSSO AMMONITICO VERONESE (MIDDLE-UPPER JURASSIC OF THE TRENTO PLATEAU): A PROPOSALLITHOSTRATIGRAPHIC RDERING AND FORMALIZATION
Creators: name: MARTIRE, LUCA
name: CLARI, PIERANGELO
name: LOZAR, FRANCESCA
name: PAVIA, GIULIO
Publisher: name: Università degli Studi di Milano
Year: 2006

description: We here propose a revision of the stratigraphic interval comprised between the top of platform carbonates, mainly of Early Jurassic age, and the base of the Maiolica, in the Trento Plateau. Most of this interval (upper Bajocian - upper Tithonian) is represented by ammonite-bearing, red nodular limestones known with the historical name of Rosso Ammonitico Veronese (RAV). It has been subdivided in three units: a lower unit, calcareous and massively bedded; a middle unit, thinly bedded and cherty; and an upper unit, calcareous and nodular. In addition to these units, other sedimentary bodies are known below the base of the RAV. These are thin and discontinuous, such as the Lumachella a Posidonia alpina (LPa) and the Calcari a Skirroceras (CSk), both spanning the upper Aalenian - upper Bajocian. A lithostratigraphic redefinition of the RAV is proposed by addition of two members (LPa e CSk) to the three classical members. The new members are easily distinguished by their lithofacies and are always separated from the lower unit by discontinuities. Two sections located on the Altopiano di Asiago are described: Kaberlaba shows all the three members (lower, middle and upper) and is proposed as the reference section for a formalization of the RAV; Rabeschini is characterized  by the absence of the middle member and may be held as a complementary section. The RAV lower boundary is everywhere very sharp and marked by a facies contrast; the upper boundary, instead, is transitional and is defined by a progressive change from red, nodular, Saccocoma packstones to white, non-nodular calpionellid wackestones. Calpionellid associations indicate that the upper boundary falls within the upper Tithonian.
description: Rivista italiana di Paleontologia e Stratigrafia, Vol 112, No 2
Improving prediction of the terrestrial water storage anomalies during the GRACE and GRACE-FO gap with Bayesian convolutional neural networks
Creators: name: Mo, Shaoxing
name: Zhong, Yulong
name: Shi, Xiaoqing
name: Feng, Wei
name: Yin, Xin
name: Wu, Jichun
Publisher: name: arXiv
Year: 2021
Subjects: subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: Machine Learning (cs.LG)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: The Gravity Recovery and Climate Experiment (GRACE) satellite and its successor GRACE Follow-On (GRACE-FO) provide valuable and accurate observations of terrestrial water storage anomalies (TWSAs) at a global scale. However, there is an approximately one-year observation gap of TWSAs between GRACE and GRACE-FO. This poses a challenge for practical applications, as discontinuity in the TWSA observations may introduce significant biases and uncertainties in the hydrological model predictions and consequently mislead decision making. To tackle this challenge, a Bayesian convolutional neural network (BCNN) driven by climatic data is proposed in this study to bridge this gap at a global scale. Enhanced by integrating recent advances in deep learning, including the attention mechanisms and the residual and dense connections, BCNN can automatically and efficiently extract important features for TWSA predictions from multi-source input data. The predicted TWSAs are compared to the hydrological model outputs and three recent TWSA prediction products. The comparison suggests the superior performance of BCNN in providing improved predictions of TWSAs during the gap in particular in the relatively arid regions. The BCNN's ability to identify the extreme dry and wet events during the gap period is further discussed and comprehensively demonstrated by comparing with the precipitation anomalies, drought index, ground/surface water levels. Results indicate that BCNN is capable of offering a reliable solution to maintain the TWSA data continuity and quantify the impacts of climate extremes during the gap.
description: 27 pages, 13 figures
SARSTEINIA BABAI N. GEN., N. SP., A NEW PROBLEMATIC SPONGE (INOZOA?) FROM THE LATE JURASSIC OF THE NORTHERN CALCAREOUS ALPS, AUSTRIA
Creators: name: SCHLAGINTWEIT, FELIX
name: GAWLICK, HANS-JÜRGEN
Publisher: name: Università degli Studi di Milano
Year: 2006

description: The new problematic sponge Sarsteinia babai n. gen., n. sp. is described from the Kimmeridgian to Tithonian Plassen and Lärchberg Formations of the Northern Calcareous Alps of Austria. The type-locality is the Sarsteinalm north of Mount Hoher Sarstein in the Austrian Salzkammergut, other findings come from Mount Sandling, Mount Jainzen, Mount Trisselwand and the Litzlkogel-Gerhardstein-complex west of Lofer. Most findings can be attributed to a fore-reef to upper slope facies or slope-of-toe breccias, small fragments can occasionally also be found in the back-reef facies. The suprageneric systematic position of the new sponge is unknown so far since it shows morphological characteristics known from Inozoa but also from "stromatoporoids".
description: Rivista italiana di Paleontologia e Stratigrafia, Vol 112, No 2