cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
ECMO in COVID-19—prolonged therapy needed? A retrospective analysis of outcome and prognostic factors
Creators: name: Dreier, Esther
name: Malfertheiner, Maximilian Valentin
name: Dienemann, Thomas
name: Fisser, Christoph
name: Foltan, Maik
name: Geismann, Florian
name: Graf, Bernhard
name: Lunz, Dirk
name: Maier, Lars Siegfried
name: Müller, Thomas
name: Offner, Robert
name: Peterhoff, David
name: Philipp, Alois
name: Salzberger, Bernd
name: Schmidt, Barbara
name: Sinner, Barbara
name: Lubnow, Matthias
Publisher: name: Universität Regensburg
Year: 2021
Subjects: subject: COVID-19; extracorporeal membrane oxygenation; ARDS; ECMO; prolonged; SARS-CoV-2
subject: 610 Medizin

description: Background: The role of venovenous extracorporeal membrane oxygenation (VV ECMO) in patients with COVID-19-induced acute respiratory distress syndrome (ARDS) still remains unclear. Our aim was to investigate the clinical course and outcome of those patients and to identify factors associated with the need for prolonged ECMO therapy. Methods: A retrospective single-center study on patients with VV ECMO for COVID-19-associated ARDS was performed. Baseline characteristics, ventilatory and ECMO parameters, and laboratory and virological results were evaluated over time. Six months follow-up was assessed. Results: Eleven of 16 patients (68.8%) survived to 6 months follow-up with four patients requiring short-term (<28 days) and seven requiring prolonged (⩾28 days) ECMO support. Lung compliance before ECMO was higher in the prolonged than in the short-term group (28.1 (28.8–32.1) ml/cmH2O vs 18.7 (17.7–25.0) ml/cmH2O, p = 0.030). Mechanical ventilation before ECMO was longer (19 (16–23) days vs 5 (5–9) days, p = 0.002) and SOFA score was higher (12.0 (10.5–17.0) vs 10.0 (9.0–10.0), p = 0.002) in non-survivors compared to survivors. Low viral load during the first days on ECMO tended to indicate worse outcomes. Seroconversion against SARS-CoV-2 occurred in all patients, but did not affect outcome. Conclusions: VV ECMO support for COVID-19-induced ARDS is justified if initiated early and at an experienced ECMO center. Prolonged ECMO therapy might be required in those patients. Although no relevant predictive factors for the duration of ECMO support were found, the decision to stop therapy should not be made dependent of the length of ECMO treatment.
A superfluid helium converter for accumulation and extraction of ultracold neutrons
Creators: name: Zimmer, O.
name: Baumann, K.
name: Fertl, M.
name: Franke, B.
name: Mironov, S.
name: Plonka, C.
name: Rich, D.
name: Schmidt-Wellenburg, P.
name: Wirth, H. -F.
name: Brandt, B. van den
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We report the first successful extraction of accumulated ultracold neutrons (UCN) from a converter of superfluid helium, in which they were produced by downscattering neutrons of a cold beam from the Munich research reactor. Windowless UCN extraction is performed in vertical direction through a mechanical cold valve. This prototype of a versatile UCN source is comprised of a novel cryostat designed to keep the source portable and to allow for rapid cooldown. We measured time constants for UCN storage and extraction into a detector at room temperature, with the converter held at various temperatures between 0.7 and 1.3 K. The UCN production rate inferred from the count rate of extracted UCN is close to the theoretical expectation.
Impurity Quantum Phase Transition in a Current-Carrying d-Wave Superconductor
Creators: name: Chen, Hua
name: Wu, Yezheng
name: Yang, Shuxiang
name: Dai, Jianhui
name: Zhu, Jian-Xin
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We study an Anderson impurity embedded in a d-wave superconductor carrying a supercurrent. The low-energy impurity behavior is investigated by using the numerical renormalization group method developed for arbitrary electronic bath spectra. The results explicitly show that the local impurity state is completely screened upon the non-zero current intensity. The impurity quantum criticality is in accordance with the well-known Kosterlitz-Thouless transition.
description: 6 pages, 8 figures, revised version with a derivation of the host Hamiltonian by a local gauge transformation and a finite size effect analysis added as two appendices, to appear in Phys. Rev. B
PAHs in the Halo of NGC 5529
Creators: name: Irwin, J. A.
name: Kennedy, H.
name: Parkin, T.
name: Madden, S.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present sensitive ISO $λ6.7 μ$m observations of the edge-on galaxy, NGC 5529, finding an extensive MIR halo around NGC 5529. The emission is dominated by PAHs in this band. The PAH halo has an exponential scale height of 3.7 kpc but can still be detected as far as $\approx 10$ kpc from the plane to the limits of the high dynamic range (1770/1) data. This is the most extensive PAH halo yet detected in a normal galaxy. This halo shows substructure and the PAHs likely originate from some type of disk outflow. PAHs are long-lived in a halo environment and therefore continuous replenishment from the disk is not required (unless halo PAHs are also being destroyed or removed), consistent with the current low SFR of the galaxy. The PAHs correlate spatially with halo H$α$ emission, previously observed by Miller & Veilleux (2003); both components are likely excited/ionized by in-disk photons that are leaking into the halo. The presence of halo gas may be related to the environment of NGC 5529 which contains at least 17 galaxies in a small group of which NGC 5529 is the dominant member. Of these, we have identified two new companions from the SDSS.
description: 16 pages, 5 gif figures, accepted for publication in A&A, For pdf with higher quality figures, see http://www.astro.queensu.ca/~irwin
Harmonic analysis on locally symmetric spaces, Damek-Ricci spaces and homogeneous trees
Creators: name: Παπαγεωργίου, Ευθυμία E.
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Τοπικά συμμετρικοί χώροι
Χώροι Damek-Ricci
Ομογενή δέντρα
Πολλαπλασιαστές
Locally symmetric spaces
Damek-Ricci spaces
Homogeneous trees
Multipliers

description: Η παρούσα διατριβή εμπίπτει κυρίως στην περιοχή της Αρμονικής Ανάλυσης και σχετίζεται άμεσα με τη Γεωμετρική Ανάλυση. Το πρώτα τρία κεφάλαια είναι εισαγωγικά: συγκεκριμένα, το πρώτο κεφάλαιο περιέχει έννοιες σχετικές με τους μη συμπαγείς συμμετρικούς χώρους, τους τοπικά συμμετρικούς χώρους, τους χώρους Damek-Ricci και τα ομογενή δέντρα. Στο δεύτερο κεφάλαιο ορίζουμε την έννοια του πυρήνα της θερμότητας και στο τρίτο κεφάλαιο αυτή των πολλαπλασιαστών στους παραπάνω χώρους. Στο τέταρτο κεφάλαιο, μελετάμε τις παραγώγους του πυρήνα της θερμότητας σε συμμετρικούς χώρους. Λαμβάνουμε εκτιμήσεις των παραγώγων ως προς τη χρονική μεταβλητή και έπειτα παρουσιάζουμε εφαρμογές των εκτιμήσεων αυτών σε τελεστές που δίνονται ως συναρτήσεις της Λαπλασιανής. Στο πέμπτο κεφάλαιο αποδεικνύουμε τα ανάλογα αποτελέσματα του προηγούμενου κεφαλαίου στην περίπτωση των χώρων Damek-Ricci. Στο έκτο κεφάλαιο αποδεικνύουμε τη φραξιμότητα ταλαντούμενων πολλαπλασιαστών στους χώρους Lebesgue, για μεγάλες κλάσεις τοπικά συμμετρικών χώρων βαθμίδας ένα. Τέλος, στο έβδομο κεφάλαιο, στην περίπτωση των ομογενών δέντρων, αποδεικνύουμε τη σχεδόν παντού σύγκλιση του τελεστή Riesz means για συναρτήσεις στους χώρους Lebesgue.
description: The present Ph.D. Thesis lies in the research area of Harmonic Analysis and is closely connected to Geometric Analysis. The first three chapters are introductory: in particular, the first chapter contains concepts related to noncompact symmetric spaces, locally symmetric spaces, Damek-Ricci spaces and homogeneous trees. In the second chapter we define the notion of the heat kernel and in the third chapter the notion of multipliers in the above spaces. In the fourth chapter, we study the derivatives of the heat kernel in symmetric spaces. We obtain estimates of the derivatives with respect to the time variable and then we present applications of these estimates to operators given as functions of the Laplacian. In the fifth chapter we prove the corresponding results of the previous chapter in the setting of Damek-Ricci spaces. In the sixth chapter we prove boundedness of oscillating multipliers in Lebesgue spaces, for large classes of rank one locally symmetric spaces. Finally, in the seventh chapter, in the case of homogeneous trees, we prove almost everywhere convergence of the Riesz means operator for functions in Lebesgue spaces.
Robust storage qubits in ultracold polar molecules
Creators: name: Gregory, Philip D.
name: Blackmore, Jacob A.
name: Bromley, Sarah L.
name: Hutson, Jeremy M.
name: Cornish, Simon L.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Atomic Physics (physics.atom-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum states with long-lived coherence are essential for quantum computation, simulation and metrology. The nuclear spin states of ultracold molecules prepared in the singlet rovibrational ground state are an excellent candidate for encoding and storing quantum information. However, it is important to understand all sources of decoherence for these qubits, and then eliminate them, in order to reach the longest possible coherence times. Here, we fully characterise the dominant mechanisms for decoherence of a storage qubit in an optically trapped ultracold gas of RbCs molecules using high-resolution Ramsey spectroscopy. Guided by a detailed understanding of the hyperfine structure of the molecule, we tune the magnetic field to where a pair of hyperfine states have the same magnetic moment. These states form a qubit, which is insensitive to variations in magnetic field. Our experiments reveal an unexpected differential tensor light shift between the states, caused by weak mixing of rotational states. We demonstrate how this light shift can be eliminated by setting the angle between the linearly polarised trap light and the applied magnetic field to a magic angle of $\arccos{(1/\sqrt{3})}\approx55^{\circ}$. This leads to a coherence time exceeding 6.9 s (90% confidence level). Our results unlock the potential of ultracold molecules as a platform for quantum computation.
description: 19 pages, 12 figures
title: Dynamics Of The Biota Of The Gulf Of Riga In The 1970-1990S
Creators: name: Ojaveer, Henn
name: Lankov, Ain
name: Näks, Liivika
name: Eero, Margit
name: Turovski, Aleksei
name: Kotta, Jonne
name: Kotta, lImar
name: Lumberg, Alide
Publisher: name: ASC 1998 - CC
Year: 2024
Subjects: Ecosystem observation, processes and dynamics

description: No abstracts are to be cited without prior reference to the author.Dynamics of the biota of the Gulf of Riga in the 1970-1990s should be interpreted as its response to major deviations in climate and important changes in anthropogenic impact. Increase in eutrophication until the late 1980s, the long stagnation period from the late 1970s to the early 1990s, and an increase in freshwater runoff favoured organisms preferring lower salinities and tolerating higher eutrophication level. Simultaneously, presence of cod in 1977-85 contributed to a drastic decrease of stocks of some marine demersal fishes and glacial relicts. Warm winters during I 988-93 caused further worsening of living condi􀆉ons of the relicts, but favoured development of warm-water fauna. Fish parasites of freshwater origin became dominant instead of eumarine helminths, crustaceans and protozoans that had been in majority at the turn of the 1970/80s. The decrease of freshwater rnnoffand anthropogenic pollution in the 1990s and the increase in water salinity and severity of winters have triggered opposite changes in the biota: stock abundance of some previously depleted fish species has increased, parasites of marine origin have grown in importance and feeding conditions of herring have improved. The alien species Cercopagis pengoi and Marenzelleria viridis, introduced probably by ship ballast waters, play an important role in the ecosystem of the Gulf of Riga in the 1990s.
title: Strategies For Optimising Energy Expenditure And Energy Intake During Foraging Dives Of Free Ranging Harbour Seals
Creators: name: Braaten, B. Espen P.
name: Bjørge, Arne
name: Thompson, Dave
name: Bryant, Edmund
Publisher: name: ASC 1998 - CC
Year: 2024
Subjects: Ecosystem observation, processes and dynamics

description: No abstracts are to be cited without prior reference to the author.Theoretical models describe strategies for maximising energy intake of diving organisms when foraging. These models predict how swim speed to and from foraging patches, and swim speed during foraging, may alter to match these strategies under different conditions. This study describe how dive behaviour of free ranging harbour seals (Phoca vitulina ) conforms to the strategies for energy optimisation, and to physiological limits of dive duration when foraging in deep and shallow waters. VHF radio tags and depth-velocity tags with ultrasonic transmitters were attached to free ranging seals. Dives with CT-shaped depth-verus-time profiles were defined as foraging dives. Deep (> 50 m), and shallow ( < 50 m) foraging dives were analysed in detail using purpose built software. The seven seals included in this study were foraging at or close to the sea bed. Mean descent and ascent angles diverted between 40 and 60 degrees from the vertical line. Swim speed during all phases of the dives averaged between 1.0 and 1.5 mis. Swim speed during ascent and descent were slightly higher in deep versus shallow dives. The time spent and swim speed at the foraging site (at the sea bed) did not vary between deep and shallow dives. These results suggest that seals were swimming close to their minimum cost of transport speed (MCTS) both in deep and shallow dives, and they may have been maximising their efficiency of energy intake, or their net rate of energy intake. Deep dives had significantly longer mean dive duration (234s31 ls) than shallow dives (186-218s). Short surface periods between dives may indicate that the dives were aerobic. Less than 4 % of the dives exceeded an estimated aerobic dive limit (TADL) of 350 second.
Language learning through TV: the RAI offer between past and present
Creators: name: Cappelli, Deborah
Publisher: name: Quaderni di Linguistica e Studi Orientali
Year: 2020

description: In the past, RAI played a fundamental role for linguistic unification in Italy when dialects were still the only means by which Italians were able to express themselves. In fact, the advent of TV has contributed to the spread of Italian by becoming a real language school. However, over time due to a strong marketing of the offer, its commitment to education has gradually diminished to leave more space for information and entertainment programs. Due to the serious emergency that hit the whole world, with the schools closed, it became necessary for RAI to support teachers. TV brings students into contact with various communication contexts; provides them with many inputs, both linguistic and cultural, which can increase their motivation, their active participation in teaching practice and their knowledge. Language learning TV courses can have several functions and advantages, even if originally aimed at a general audience, they can be integrated into school and academic teaching and become part of the program. This does not detract from the role of teachers as it is their task to guide the teaching of the foreign language, taking advantage of television courses.
description: Quaderni di Linguistica e Studi Orientali, Vol. 6 (2020)
Design Strategies for the Geometric Synthesis of Orthoglide-type Mechanisms
Creators: name: Pashkevich, Anatoly
name: Wenger, Philippe
name: Chablat, Damien
Publisher: name: arXiv
Year: 2007
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: The paper addresses the geometric synthesis of Orthoglide-type mechanism, a family of 3-DOF parallel manipulators for rapid machining applications, which combine advantages of both serial mechanisms and parallel kinematic architectures. These manipulators possess quasi-isotropic kinematic performances and are made up of three actuated fixed prismatic joints, which are mutually orthogonal and connected to a mobile platform via three parallelogram chains. The platform moves in the Cartesian space with fixed orientation, similar to conventional XYZ-machine. Three strategies have been proposed to define the Orthoglide geometric parameters (manipulator link lengths and actuated joint limits) as functions of a cubic workspace size and dextrous properties expressed by bounds on the velocity transmission factors, manipulability or the Jacobian condition number. Low inertia and intrinsic stiffness have been set as additional design goals expressed by the minimal link length requirement. For each design strategy, analytical expressions for computing the Orthoglide parameters are proposed. It is showed that the proposed strategies yield Pareto-optimal solutions, which differ by the kinematic performances outside the prescribed Cartesian cube (but within the workspace bounded by the actuated joint limits). The proposed technique is illustrated with numerical examples for the Orthoglide prototype design.
Mapping electron delocalization by charge transport spectroscopy in an artificial molecule
Creators: name: Graeber, M. R.
name: Weiss, M.
name: Keller, D.
name: Oberholzer, S.
name: Schoenenberger, C.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: In this letter we present an experimental realization of the quantum mechanics textbook example of two interacting electronic quantum states that hybridize forming a molecular state. In our particular realization, the quantum states themselves are fabricated as quantum dots in a molecule, a carbon nanotube. For sufficient quantum-mechanical interaction (tunnel coupling) between the two quantum states, the molecular wavefunction is a superposition of the two isolated (dot) wavefunctions. As a result, the electron becomes delocalized and a covalent bond forms. In this work, we show that electrical transport can be used as a sensitive probe to measure the relative weight of the two components in the superposition state as a function of the gate-voltages. For the field of carbon nanotube double quantum dots, the findings represent an additional step towards the engineering of quantum states.
Finite Dimensional Intuitionistic Fuzzy Normed Linear Space
Creators: name: Samanta, T. K.
name: Jebril, Iqbal H.
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Mathematics (math.GM)
subject: FOS: Mathematics

description: Following the definition of intuitionistic fuzzy n-norm [ 3 ], we have introduced the definition of intuitionistic fuzzy norm (in short IFN) over a linear space and there after a few results on intuitionistic fuzzy normed linear space and finite dimensional intuitionistic fuzzy normed linear space. Lastly, we have introduced the definitions of intuitionistic fuzzy continuity and sequentially intuitionistic fuzzy continuity and proved that they are equivalen
description: 16 pages. arXiv admin note: substantial text overlap with arXiv:1005.4140
Directly profiling the dark-state transition density via scanning tunneling microscope
Creators: name: Dong, Guohui
name: Hu, Zhubin
name: Sun, Xiang
name: Dong, Hui
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The molecular dark state participates in many important photon-induced processes, yet is typically beyond the optical-spectroscopic measurement due to the forbidden transition dictated by the selection rule. In this work, we propose to use the scanning tunneling microscope (STM) as an incisive tool to directly profile the dark-state transition density of a single molecule, taking advantage of the localized static electronic field near the metal tip. The detection of dark state is achieved by measuring the fluorescence from a higher bright state to the ground state with assistant optical pumping. The current proposal shall bring new methodology to study the single-molecule properties in the electro-optical devices and the light-assisted biological processes.
Luminosity function, sizes and FR dichotomy of radio-loud AGN
Creators: name: Kaiser, Christian R.
name: Best, Philip N.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The radio luminosity function (RLF) of radio galaxies and radio-loud quasars is often modelled as a broken power-law. The break luminosity is close to the dividing line between the two Fanaroff-Riley (FR) morphological classes for the large-scale radio structure of these objects. We use an analytical model for the luminosity and size evolution of FRII-type objects together with a simple prescription for FRI-type sources to construct the RLF. We postulate that all sources start out with an FRII-type morphology. Weaker jets subsequently disrupt within the quasi-constant density cores of their host galaxies and develop turbulent lobes of type FRI. With this model we recover the slopes of the power laws and the break luminosity of the RLF determined from observations. The rate at which AGN with jets of jet power $Q$ appear in the universe is found to be proportional to $Q^{-1.6}$. The model also roughly predicts the distribution of the radio lobe sizes for FRII-type objects, if the radio luminosity of the turbulent jets drops significantly at the point of disruption. We show that our model is consistent with recent ideas of two distinct accretion modes in jet-producing AGN, if radiative efficiency of the accretion process is correlated with jet power.
description: 13 pages, 1 figure, accepted by MNRAS
Classification of manifolds with weakly 1/4-pinched curvatures
Creators: name: Brendle, S.
name: Schoen, R. M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: We show that a compact Riemannian manifold with weakly 1/4-pinched sectional curvatures is either locally symmetric or diffeomorphic to a space form.
description: Final version
title: Herring Ciupea Harengus As A Key Species In Northeast Atlantic Minke Whale Baiaenoptera Acutorostrata Diets
Creators: name: Lindstrøm, Ulf
name: Haug, Tore
name: Røttingen, Ingolf
Publisher: name: ASC 1998 - CC
Year: 2024
Subjects: Ecosystem observation, processes and dynamics

description: No abstracts are to be cited without prior reference to the author.Using results from annual studies since 1992 in the Barents Sea, the dynamics in Northeast Atlantic minke whale Baleaenoptera acutorostrata predation upon Norwegian spring spawning herring Clupea harengus, including the effect of the collapse and subsequent increase in the herring stock, were assessed. The location of herring spawning is along the western coast of Norway, whereas the larvae are transported northwards to fjord and coastal areas, but in particular to the Barents Sea Here the immature herring spend their first 2-4 years. The abundance of immature herring year classes in the Barents Sea has been highly variable. One or a few strong year classes are usually followed, by several years of poor year classes. In the period 1992-1995, the northeast Atlantic minke whale appeared to have consumed 610 000 tonnes of adolescent Norwegian spring spawning herring annually in the Barents Sea area. The major part of this belonged to the strong I 991 and 1992 year classes. Toe abundance and distribution of herring appears to be well correlated with its diatary importance for the whales. An example of this was when the major part of the 1992 year class migrated out of the Barents Sea in 1995. This was followed by a subsequent reduction in the dietary importance of herring by 50% (in fact, to virtually absence) compared with the year before. During the period 1992-1995, minke whales may have consumed as much as 1.3-1.4 and 0.8-1.0 million tons of the two strong herring year classes of 1991 and 1992, respectively.
Anomalies from correlation functions in defect conformal field theory
Creators: name: Herzog, Christopher P.
name: Shamir, Itamar
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In previous work, we showed that an anomaly in the one point function of marginal operators is related by the Wess-Zumino condition to the Euler density anomaly on a two dimensional defect or boundary. Here we analyze in detail the two point functions of marginal operators with the stress tensor and with the displacement operator in three dimensions. We show how to get the boundary anomaly from these bulk two point functions and find perfect agreement with our anomaly effective action. For a higher dimensional conformal field theory with a four dimensional defect, we describe for the first time the anomaly effective action that relates the Euler density term to the one point function anomaly, generalizing our result for two dimensional defects.
Classification and comparison of license plates localization algorithms
Creators: name: Saidallah, Mustapha
name: Taki, Fatimazahra
name: Alaoui, Abdelbaki El Belrhiti El
name: Fergougui, Abdeslam El
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: The Intelligent Transportation Systems (ITS) are the subject of a world economic competition. They are the application of new information and communication technologies in the transport sector, to make the infrastructures more efficient, more reliable and more ecological. License Plates Recognition (LPR) is the key module of these systems, in which the License Plate Localization (LPL) is the most important stage, because it determines the speed and robustness of this module. Thus, during this step the algorithm must process the image and overcome several constraints as climatic and lighting conditions, sensors and angles variety, LPs no-standardization, and the real time processing. This paper presents a classification and comparison of License Plates Localization (LPL) algorithms and describes the advantages, disadvantages and improvements made by each of them
description: 11 pages
Double-lens technique for efficient capture of short-lived particles by a crystal
Creators: name: Biryukov, V. M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: For the experiments to measure the dipole moments of short-lived particles via crystal channeling, we propose a beam-optics system of two crystal lenses that increases the number of channeled short-lived particles per one incident primary proton by a factor of about 1000 at LHC.
description: 8 pages, 3 figures
Evidence of intra-binary shock emission from the redback pulsar PSR J1048+2339
Creators: name: Zanon, A. Miraval
name: D'Avanzo, P.
name: Ridolfi, A.
name: Zelati, F. Coti
name: Campana, S.
name: Tiburzi, C.
name: de Martino, D.
name: Darias, T. Muñoz
name: Bassa, C. G.
name: Zampieri, L.
name: Possenti, A.
name: Ambrosino, F.
name: Papitto, A.
name: Baglio, M. C.
name: Burgay, M.
name: Burtovoi, A.
name: Michilli, D.
name: Ochner, P.
name: Zucca, P.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present simultaneous multiwavelength observations of the 4.66 ms redback pulsar PSR J1048+2339. We performed phase-resolved spectroscopy with the Very Large Telescope (VLT) searching for signatures of a residual accretion disk or intra-binary shock emission, constraining the companion radial velocity semi-amplitude ($K_2$), and estimating the neutron star mass ($M_{\rm NS}$). Using the FORS2-VLT intermediate-resolution spectra, we measured a companion velocity of $291 < K_2 < 348$ km s$^{-1}$ and a binary mass ratio of $0.209 < q < 0.250$. Combining our results for $K_2$ and $q$, we constrained the mass of the neutron star and the companion to $(1.0 < M_{\rm NS} < 1.6){\rm sin}^{-3}i\,M_{\odot}$ and $(0.24 < M_2 < 0.33){\rm sin}^{-3}i\,M_{\odot}$, respectively, where $i$ is the system inclination. The Doppler map of the H$α$ emission line exhibits a spot feature at the expected position of the companion star and an extended bright spot close to the inner Lagrangian point. We interpret this extended emission as the effect of an intra-binary shock originating from the interaction between the pulsar relativistic wind and the matter leaving the companion star. The mass loss from the secondary star could be either due to Roche-lobe overflow or to the ablation of its outer layer by the energetic pulsar wind. Contrastingly, we find no evidence for an accretion disk. We report on the results of the SRT and the LOFAR simultaneous radio observations at three different frequencies (150 MHz, 336 MHz, and 1400 MHz). No pulsed radio signal is found in our search. This is probably due to both scintillation and the presence of material expelled from the system which can cause the absorption of the radio signal at low frequencies. Finally, we report on an attempt to search for optical pulsations using IFI+Iqueye mounted at the 1.2 m Galileo telescope at the Asiago Observatory.
description: 12 pages, 10 figures, accepted for publication in A&A
Transverse rectification in density-modulated two-dimensional electron gases
Creators: name: Ganczarczyk, A.
name: Rojek, S.
name: Quindeau, A.
name: Geller, M.
name: Hucht, A.
name: Notthoff, C.
name: Reuter, D.
name: Wieck, A. D.
name: König, J.
name: Lorke, A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We demonstrate tunable transverse rectification in a density-modulated two-dimensional electron gas (2DEG). The density modulation is induced by two surface gates, running in parallel along a narrow stripe of 2DEG. A transverse voltage in the direction of the density modulation is observed, i.e. perpendicular to the applied source-drain voltage. The polarity of the transverse voltage is independent of the polarity of the source-drain voltage, demonstrating rectification in the device. We find that the transverse voltage $U_{y}$ depends quadratically on the applied source-drain voltage and non-monotonically on the density modulation. The experimental results are discussed in the framework of a diffusion thermopower model.
description: 8 pages, 9 figures, published in PRB
Il consonantismo dell’italiano regionale di Ancona: prime indagini sperimentali
Creators: name: Tordini, Ottavia
Publisher: name: Quaderni di Linguistica e Studi Orientali
Year: 2020

description: Due to its peculiar geopolitical layout, Ancona is connoted by a manifold linguistic profile – particularly for what concerns the consonantal system. However, this area has been so far scarcely investigated from a phonetic perspective. In this work, we propose the first acoustic description of selected consonants, as spoken in the local Italian variety: /p, t, k, s/. Literature unanimously reports that the local dialect is characterized by: a) the consonantal weakening of northern origin, which provokes voicing of /p, t, k, s/ in intervocalic position and degemination; b) the affrication of /s/ after /l, n, r/ – typical of other areas in central Italy. The aim is to verify whether these phenomena are attested also in the Italian variety spoken in Ancona. For this purpose, we conducted an acoustic analysis on spontaneous productions of 12 adult subjects (6 males and 6 females). While the sonorization of intervocalic /s/, which occurs in both northern and standard Italian pronunciations with all the well-known exceptions, is regular, the sonorization/lenition of voiceless plosives and degemination do not surface systematically. Presumably, these traits are perceived – more or less consciously – as socio-phonetic markers, thus mostly avoided in the pronunciation of Italian. At phonetic level, the dialectal interference is however statistically more pervasive in the male sample.
description: Quaderni di Linguistica e Studi Orientali, Vol. 6 (2020)
Harmonic elctron-cyclotron maser emissions driven by energetic electrons of the horseshoe distribution with application to solar radio spikes
Creators: name: Ning, Hao
name: Chen, Yao
name: Ni, Sulan
name: Li, Chuanyang
name: Zhang, Zilong
name: Kong, Xiangliang
name: Yousefzadeh, Mehdi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Content. Electron-cyclotron maser emission (ECME) is the favored mechanism for solar radio spikes and has been investigated extensively since the 1980s. Most studies relevant to solar spikes employ a loss-cone-type distribution of energetic electrons, generating waves mainly in the fundamental X/O mode (X1/O1), with a ratio of plasma oscillation frequency to electron gyrofrequency ($ω_ {pe}/Ω_{ce}$) lower than 1. Despite the great progress made in this theory, one major problem is how the fundamental emissions pass through the second-harmonic absorption layer in the corona and escape. This is generally known as the escaping difficulty of the theory. Aims. We study the harmonic emissions generated by ECME driven by energetic electrons with the horseshoe distribution to solve the escaping difficulty of ECME for solar spikes. Methods. We performed a fully kinetic electromagnetic PIC simulation with $ω_ {pe}/Ω_{ce}$ = 0.1, corresponding to the strongly magnetized plasma conditions in the flare region, with energetic electrons characterized by the horseshoe distribution. We also varied the density ratio of energetic electrons to total electrons ($n_e/n_0$) in the simulation. Results. We obtain efficient amplification of waves in Z and X2 modes, with a relatively weak growth of O1 and X3. With a higher-density ratio, the X2 emission becomes more intense, and the rate of energy conversion from energetic electrons into X2 modes can reach $\sim$0.06% and 0.17%, with $n_e/n_0$= 5% and 10%, respectively. Conclusions. We find that the horseshoe-driven ECME can lead to an efficient excitation of X2 and X3 with a low value of $ω_ {pe}/Ω_{ce}$, providing novel means for resolving the escaping difficulty of ECME when applied to solar radio spikes. The simultaneous growth of X2 and X3 can be used to explain some harmonic structures observed in solar spikes.
description: 10 pages, 9 figures
An Exhaustive Study of the Workspaces Tolopogies of all 3R Orthogonal Manipulators with Geometric Simplifications
Creators: name: Zein, Mazen
name: Wenger, Philippe
name: Chablat, Damien
Publisher: name: arXiv
Year: 2007
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: This paper proposes a classification of three-revolute orthogonal manipulators that have at least one of their DH parameters equal to zero. This classification is based on the topology of their workspace. The workspace is characterized in a half-cross section by the singular curves. The workspace topology is defined by the number of cusps and nodes that appear on these singular curves. The manipulators are classified into different types with similar kinematic properties. Each type is evaluated according to interesting kinematic properties such as, whether the workspace is fully reachable with four inverse kinematic solutions or not, the existence of voids, and the feasibility of continuous trajectories in the workspace. It is found that several orthogonal manipulators have a "well-connected" workspace, that is, their workspace is fully accessible with four inverse kinematic solutions and any continuous trajectory is feasible. This result is of interest for the design of alternative manipulator geometries.
In-medium nuclear interactions of low-energy hadrons
Creators: name: Friedman, E.
name: Gal, A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Experimental and theoretical developments of the last decade in the study of exotic atoms and some related low-energy reactions are reviewed, in order to provide information on the in-medium hadron-nucleon t matrix over a wide range of densities up to central nuclear densities. In particular, we review pionic deeply bound atomic states and related evidence for partial restoration of chiral symmetry in dense nuclear matter. The case for relatively narrow deeply bound atomic states for antikaons and antiprotons is made, based on the physics of strong nuclear absorption. Recent experimental suggestions for signals of antikaon-nuclear deeply bound states are reviewed, and dynamical models for calculating binding energies, widths and densities of antikaon nuclear states are discussed. Specific features of low-energy in-medium interactions of kaons, antiprotons and of Sigma hyperons are discussed, and suggestions to study experimentally Cascade atoms are reviewed.
description: 86 pages, 44 figures, slight revisions, references added, Physics Reports (in press)
The syntactic structure of the Xhosa "e-" N "-ini" locatives
Creators: name: Taraldsen, Knut Tarald
Publisher: name: Quaderni di Linguistica e Studi Orientali
Year: 2020

description: This article aims at presenting arguments for a new analysis of locative expressions with the prefix e and the suffix -ini in Xhosa. This analysis views the most striking properties of these expressions as syntactic in nature and is based on arguments to the effect that a purely morphological analysis doesn’t provide explanatory accounts of the relevant facts.
description: Quaderni di Linguistica e Studi Orientali, Vol. 6 (2020)
title: Feeding Habits Of Harp Seals Phoca Groenlandica During Summer In Svalbard Waters
Creators: name: Nilssen, Kjen T.
name: Ahlqvist, Ivan
name: Harbitz, Alf
name: Hang, Tore
name: Lindblom, Lotta
Publisher: name: ASC 1998 - CC
Year: 2024
Subjects: Ecosystem observation, processes and dynamics

description: No abstracts are to be cited without prior reference to the author.Stomach and intestinal contents were collected from harp seals Phoca groenlandicain four sub-areas east and north of the Svalbard archipelago during July and August in 1996 and 1997. A total of20 species were identified as harp seal prey in the presented analyses. Krill Thysanoessa sp. and polar cod Boreogadus saida were the predominant prey species in terms of calculated biomass in both years. In 1997, Atlantic cod Gadus morhua and fish from the Stichaeidae family also contributed significantly to the seal diet. In two of the investigated sub-areas, data from acoustic and trawl surveys were obtained concurrently with the takes of seals. The acoustic data was used to assess the abundance of various species in the water column, and krill was found to be the most abundant species in both areas. Data from the trawl hauls were compared with the harp seal diets in analyses developed to assess potential prey selection by the seals. The results of these analyses showed no strong indications of positive or negative preferences for any particular species.
German wh-copying: a top-down analysis
Creators: name: Rugna, Giuseppe
Publisher: name: Quaderni di Linguistica e Studi Orientali
Year: 2020

description: German wh-copying is often taken to represent clear evidence for successive cyclicity and for the Copy Theory of Movement. The generative literature has focused on a particular type of wh-copying displaying morphophonological identity among the overtly realized members of the A’-chain. The present article discusses the case of two additional types of wh-copying found in German, i.e. ‘imperfect’ and ‘complex’ wh-coping. It will be argued that standard bottom-up analyses run into a few complications when extended to account for the latter types of wh-copying. A novel analysis embedded in a Top-Down derivational model of grammar is then proposed, which is argued to be conceptually as well as empirically superior over more traditional alternatives. The analysis of complex wh-copying in German is further extended to the case of Afrikaans and dialectal Dutch.
description: Quaderni di Linguistica e Studi Orientali, Vol. 6 (2020)
Dimensional adjectives in Cognitive Linguistics: The case of big
Creators: name: Σύρπα, Παναγιώτα Θ.
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Cognitive Linguistics
Metaphor - Metonymy
Active Zones
Polysemy
Γνωσιακή Γλωσσολογία
Μεταφορά - Μετωνυμία
Ενεργές Ζώνες
Πολυσημία

description: This work employs the basic Cognitive Linguistics tools (Active Zones, Metonymy, Metaphor) to explore the ways the adjectival construction big + N covers the whole spectrum from literal to figurative language. The different language areas on this spectrum are not clearly delineated or bounded, so they are approached and discussed as different knots on a continuum. All the big + N constructions included in this PhD thesis came from the CoCA and they were used to construct 3 different multi-versioned questionnaires in order to test experimentally the polysemy of the construction. The experimental part took place in the University of Alberta, Canada among native speakers of English.
description: Η διατριβή εξετάζει την πολυσημία της δομής επίθετο + ουσιαστικό μελετώντας την περίπτωση της δομής big + ουσιαστικό. Συγκεκριμένα, εξετάζονται τέσσερις διαφορετικές σημασίες που προέκυψαν από τη μελέτη αυθεντικού λόγου (σώμα κειμένων Corpus of Contemporary American English). Οι σημασίες αυτές καλύπτουν ένα ευρύ φάσμα από τον κυριολεκτικό ως τον μεταφορικό λόγο και τοποθετούνται σε ένα γλωσσικό συνεχές χωρίς διακριτά όρια σε όλες τις περιπτώσεις. Για την προσέγγιση και ανάλυση των διαφορετικών σημασιών χρησιμοποιούνται βασικά Γνωσιακά κλειδιά (μεταφορά, μετωνυμία και ενεργές ζώνες) καθώς επίσης και γλωσσικά πειράματα με φυσικούς ομιλητές της αγγλικής γλώσσας στο Παν/μιο Alberta του Καναδά.
Descendants of Muhajir Georgians in Giresun (Turkey) and their speech codes
Creators: name: Putkaradze, Tariel
name: Labadze, Mikheil
Publisher: name: Quaderni di Linguistica e Studi Orientali
Year: 2020

description: In our article we review a Georgian dialectal speech of the Georgian Muhajirs’ descendants in Giresun, Turkey. All the research materials are obtained by us during the expedition July 8-19, 2019 in Turkey, Karadeniz (Black Sea Coast) region. In the article, all the Illustrative phrases in Georgian are transcribed with specific Latin-based transcription for Ibero-Caucasian Languages. The most part of Muhajir Georgians’ Giresun descendants have preserved the Georgian ethnical self-concept. Due to the code-switching process going on during 140 years the historical mother tongue is only spoken by the older generation; their knowledge of the Turkish language is mostly poor. The people of middle generation are usually bilingual speaking both Georgian and Turkish. The younger generation speaks only Turkish, which they consider more prestigious than the mother tongue of their ancestors. Consequently, the Acharan dialect of Georgian spoken in Giresun is at risk of going extinct in the near future. The risk is increased by the fact that the representatives of younger generation who want to know their ancestors’ language and develop friendly relations with Georgia are learning the literary Georgian: having learnt the literary Georgian they try to speak “correctly” and avoid using dialects.
description: Quaderni di Linguistica e Studi Orientali, Vol. 6 (2020)
Locality in music and syntax: a minimalist analysis of modulation
Creators: name: Pescarini, Diego
Publisher: name: Quaderni di Linguistica e Studi Orientali
Year: 2020

description: The article provides an analysis of tonicization and modulation in western tonal music within the framework of minimalist syntax. In the spirit of Katz and Pesetsky’s 2011 Identity Thesis for Language and Music, I argue that syntactic notions such as Agree and (Phase) Impenetrability may shed light on some aspects of music theory involving dependencies within local domains.
description: Quaderni di Linguistica e Studi Orientali, Vol. 6 (2020)
Additional file 1: of GTSE1 is involved in breast cancer progression in p53 mutation-dependent manner
Creators: name: Lin, Fen
name: Xie, Yu-Jie
name: Zhang, Xin-Ke
name: Huang, Tie-Jun
name: Xu, Hong-Fa
name: Mei, Yan
name: Liang, Hu
name: Hu, Hao
name: Lin, Si-Ting
name: Luo, Fei-Fei
name: Lang, Yan-Hong
name: Peng, Li-Xia
name: Qian, Chao-Nan
name: Huang, Bi-Jun
Publisher: name: figshare
Year: 2019
Subjects: subject: Space Science
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: Molecular Biology
subject: Evolutionary Biology
subject: Chemical Sciences not elsewhere classified
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Plant Biology
subject: Virology

description: Table S1: Primer sequence. Table S2: The sequences of small interfering RNA of GTSE1. Table S3: GTSE1 â SureSilencing shRNAâ plasmids sequences. (DOCX 27 kb)
title: Sedimente erlauben Einblicke in letzte Kaltzeit
Creators: name: Kraudzun, Henning
Publisher: name: Deutsches GeoForschungsZentrum GFZ
Year: 2020

description: Ein deutsch-russisches Forscherteam hat Sedimentkerne aus nahezu unberührten Seen in der russischen Arktis geborgen, um mehr über die Umweltbedingungen und Klimaveränderungen in der gesamten letzten Kaltzeit zu erfahren. Gefördert wird das Projekt PLOT vom Bundesforschungsministerium im Rahmen der wissenschaftlich-technischen Zusammenarbeit mit Russland.
Short-Run Regional Forecasts: Spatial Models through Varying Cross-Sectional and Temporal Dimensions
Creators: name: Mayor-Fernández, Matías
name: Patuelli, Roberto
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2012
Subjects: SECS-P/02 Politica economica

description: In any economic analysis, regions or municipalities should not be regarded as isolated spatial units, but rather as highly interrelated small open economies. These spatial interrelations must be considered also when the aim is to forecast economic variables. For example, policy makers need accurate forecasts of the unemployment evolution in order to design short- or long-run local welfare policies. These predictions should then consider the spatial interrelations and dynamics of regional unemployment. In addition, a number of papers have demonstrated the improvement in the reliability of long-run forecasts when spatial dependence is accounted for. We estimate a heterogeneouscoefficients dynamic panel model employing a spatial filter in order to account for spatial heterogeneity and/or spatial autocorrelation in both the levels and the dynamics of unemployment, as well as a spatial vector-autoregressive (SVAR) model. We compare the short-run forecasting performance of these methods, and in particular, we carry out a sensitivity analysis in order to investigate if different number and size of the administrative regions influence their relative forecasting performance. We compute short-run unemployment forecasts in two countries with different administrative territorial divisions and data frequency: Switzerland (26 regions, monthly data for 34 years) and Spain (47 regions, quarterly data for 32 years).