cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Purification of Single-photon Entanglement
Creators: name: Salart, D.
name: Landry, O.
name: Sangouard, N.
name: Gisin, N.
name: Herrmann, H.
name: Sanguinetti, B.
name: Simon, C.
name: Sohler, W.
name: Thew, R. T.
name: Thomas, A.
name: Zbinden, H.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Single-photon entanglement is a simple form of entanglement that exists between two spatial modes sharing a single photon. Despite its elementary form, it provides a resource as useful as polarization-entangled photons and it can be used for quantum teleportation and entanglement swapping operations. Here, we report the first experiment where single-photon entanglement is purified with a simple linear-optics based protocol. Besides its conceptual interest, this result might find applications in long distance quantum communication based on quantum repeaters.
description: Main article: 5 pages, 4 figures
Topology optimization with a closed cavity exclusion constraint for additive manufacturing based on the fictitious physical model approach
Creators: name: Yamada, Takayuki
name: Noguchi, Yuki
Publisher: name: arXiv
Year: 2021
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences
subject: J.6; I.6; I.5; G.1; D.2
subject: 65D17

description: This paper proposes a topology optimization method that considers the geometric constraint of no closed cavities to improve the effectiveness of additive manufacturing based on the fictitious physical model approach. First, the basic topology optimization concept and level set-based method are introduced. Next, the fictitious physical model for a geometric constraint in the topology optimization framework is discussed. Then, a model for the geometric constraint of no closed cavities for additive manufacturing is proposed. Numerical examples are provided to validate the proposed model. In addition, topology optimization considering the geometric constraint is formulated, and topology optimization algorithms are constructed using the finite element method. Finally, optimization examples are provided to validate the proposed topology optimization method.
description: 29 pages, 14 figures
Analytical and Numerical Investigation of Ant Behavior Under Crowded Conditions
Creators: name: Peters, Karsten
name: Johansson, Anders
name: Dussutour, Audrey
name: Helbing, Dirk
Publisher: name: arXiv
Year: 2008
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Physical sciences

description: Swarm intelligence is widely recognized as a powerful paradigm of self-organized optimization, with numerous examples of successful applications in distributed artificial intelligence. However, the role of physical interactions in the organization of traffic flows in ants under crowded conditions has only been studied very recently. The related results suggest new ways of congestion control and simple algorithms for optimal resource usage based on local interactions and, therefore, decentralized control concepts. Here, we present a mathematical analysis of such a concept for an experiment with two alternative ways with limited capacities between a food source and the nest of an ant colony. Moreover, we carry out microscopic computer simulations for generalized setups, in which ants have more alternatives or the alternative ways are of different lengths. In this way and by variation of interaction parameters, we can get a better idea, how powerful congestion control based on local repulsive interactions may be. Finally, we will discuss potential applications of this design principle to routing in traffic or data networks and machine usage in supply systems.
A spectroscopic and photometric study of MSP companions in Galactic Globular Clusters
Creators: name: Cocozza, Gabriele <1974>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2008
Subjects: FIS/05 Astronomia e astrofisica

description: This Thesis is devoted to the study of the optical companions of Millisecond
Pulsars in Galactic Globular Clusters (GCs) as a part of a large project started at
the Department of Astronomy of the Bologna University, in collaboration with other
institutions (Astronomical Observatory of Cagliari and Bologna, University of Virginia),
specifically dedicated to the study of the environmental effects on passive stellar evolution
in galactic GCs.
Globular Clusters are very efficient “Kilns” for generating exotic object, such as
Millisecond Pulsars (MSP), low mass X-ray binaries(LMXB) or Blue Straggler Stars
(BSS). In particular MSPs are formed in binary systems containing a Neutron Star which
is spun up through mass accretion from the evolving companion (e.g. Bhattacharia & van
den Heuvel 1991). The final stage of this recycling process is either the core of a peeled
star (generally an Helium white dwarf) or a very light almos exhausted star, orbiting a very
fast rotating Neutron Star (a MSP). Despite the large difference in total mass between the
disk of the Galaxy and the Galactic GC system (up a factor 103), the percentage of fast
rotating pulsar in binary systems found in the latter is very higher. MSPs in GCs show spin
periods in the range 1.3 ÷ 30ms, slowdown rates ˙P 1019 s/s and a lower magnetic field,
respect to ”normal” radio pulsars, B  108 gauss . The high probability of disruption of a
binary systems after a supernova explosion, explain why we expect only a low percentage
of recycled millisecond pulsars respect to the whole pulsar population. In fact only the
10% of the known 1800 radio pulsars are radio MSPs.
Is not surprising, that MSP are overabundant in GCs respect to Galactic field, since
in the Galactic Disk, MSPs can only form through the evolution of primordial binaries,
and only if the binary survives to the supernova explosion which lead to the neutron star
formation. On the other hand, the extremely high stellar density in the core of GCs,
relative to most of the rest of the Galaxy, favors the formation of several different binary
systems, suitable for the recycling of NSs (Davies at al. 1998).
In this thesis we will present the properties two millisecond pulsars companions
discovered in two globular clusters, the Helium white dwarf orbiting the MSP PSR 1911-5958A in NGC 6752 and the second case of a tidally deformed star orbiting an eclipsing
millisecond pulsar, PSR J1701-3006B in NGC6266
Studies related to the insect control potential of thujone derivatives
Creators: name: Balsevich, J.
Publisher: name: University of British Columbia
Year: 2010

description: Treatment of cedar leaf oil with aqueous potassium permanganate resulted in the oxidative ring opening of thujone (VI), the major component of the leaf oil, to yield the crystalline α-thujaketonic acid (VII). This material because of its availability and interesting structure represented an attractive starting material for the synthesis of some novel analogs of possible insect controlling agents. Therefore, to achieve this goal the functionalization of the ketonic carbonyl of α-thujaketonic acid was studied. Treatment of the sodium salt of α-thujaketonic acid in dimethyl sulfoxide with the phosphorane produced from either methyltriphenylphosphoniurn bromide or isopropyl-triphenylphosphoniurn iodide yielded the methylene and isopropylidene derivatives of α-thujaketonic acid (XIII, XIV). These two compounds represented two novel analogs of chrysanthemic acid, a naturally occurring material of which numerous derivatives are known which possess insecticidal activity. With the establishment of the conditions for the Wittig reaction of α-thujaketonic acid with a phosphonium salt, two routes for the synthesis of phosphonium salts which when coupled to α- or β-thujaketonic acid (XI, XII) would lead to insect hormone analogs, were studied. Thus, Horner reaction of 2-butanone with trimethylphos- phonoacetate resulted in the preparation of cis and trans methyl 3-methyl-2-pentenoates (XX, XXI), which were separated by means of spinning band distillation. In the first sequence studied the separate isomers were elaborated via standard means to yield the cis and trans 7-methyl-6-nonene-3-ols (XXVI and XXXII) which possessed the desired carbon skeleton. However, upon conversion of the trans secondary alcohol (XXXII) to the iodide (XXXIII), and treatment of this iodide with triphenylphosphine, none of the desired trans 7-methyl-6-nonene-3-triphenyl-phosphonium iodide (XIX) was isolated. Therefore, the study of an alternate route for the synthesis of the desired cis and trans 7-methyl-6-nonene-3-triphenylphosphonium iodides (XVIII and XIX) was undertaken. Elaboration of cis methyl 3-methyl-2-pentenoate to cis 5-methyl-4-heptenetriphenylphosphonium iodide (XLVI) was achieved by standard means. Treatment of this phosphonium salt with n-butyllithium and ethyl iodide then yielded the desired cis 7-methyl-6-nonene-3-triphenylphosphonium iodide (XVIII).
Predicting Job Titles from Job Descriptions with Multi-label Text Classification
Creators: name: Tran, Hieu Trung
name: Vo, Hanh Hong Phuc
name: Luu, Son T.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: Finding a suitable job and hunting for eligible candidates are important to job seeking and human resource agencies. With the vast information about job descriptions, employees and employers need assistance to automatically detect job titles based on job description texts. In this paper, we propose the multi-label classification approach for predicting relevant job titles from job description texts, and implement the Bi-GRU-LSTM-CNN with different pre-trained language models to apply for the job titles prediction problem. The BERT with multilingual pre-trained model obtains the highest result by F1-scores on both development and test sets, which are 62.20% on the development set, and 47.44% on the test set.
description: Published in the 2021 NAFOSTED Conference on Information and Computer Science (NICS 2021)
Proton-air cross section measurement with the ARGO-YBJ cosmic ray experiment
Creators: name: YBJ Collaboration
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The proton-air cross section in the energy range 1-100 TeV has been measured by the ARGO-YBJ cosmic ray experiment. The analysis is based on the flux attenuation for different atmospheric depths (i.e. zenith angles) and exploits the detector capabilities of selecting the shower development stage by means of hit multiplicity, density and lateral profile measurements at ground. The effects of shower fluctuations, the contribution of heavier primaries and the uncertainties of the hadronic interaction models, have been taken into account. The results have been used to estimate the total proton-proton cross section at center of mass energies between 70 and 500 GeV, where no accelerator data are currently available.
description: 14 pages, 9 figures
Elucidating Jet Energy Loss Using Jets: Prospects from ATLAS
Creators: name: Grau, N.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Jets at the LHC are expected to provide the testing ground for studying QCD energy loss. In this contribution, we briefly outline the strategy that will be used to measure jets in ATLAS and how we will go about studying energy loss. We describe the utility of measuring the jet $R_{AA}$, the fragmentation function, and heavy flavor jets. Utilizing the collision energy provided by the LHC and the nearly hermetic and highly segmented calorimeter, ATLAS is expected to make important contributions to the understanding of parton energy loss using fully reconstructed jets.
description: 4 pages, 3 figures - To appear in the conference proceedings for Quark Matter 2009, March 30 - April 4, Knoxville, Tennessee
Solving the Dirac equation with nonlocal potential by Imaginary Time Step method
Creators: name: Zhang, Ying
name: Liang, Haozhao
name: Meng, Jie
Publisher: name: arXiv
Year: 2009
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The Imaginary Time Step (ITS) method is applied to solve the Dirac equation with the nonlocal potential in coordinate space by the ITS evolution for the corresponding Schrödinger-like equation for the upper component. It is demonstrated that the ITS evolution can be equivalently performed for the Schrödinger-like equation with or without localization. The latter algorithm is recommended in the application for the reason of simplicity and efficiency. The feasibility and reliability of this algorithm are also illustrated by taking the nucleus $^{16}$O as an example, where the same results as the shooting method for the Dirac equation with localized effective potentials are obtained.
Dirac fermions on a disclinated flexible surface
Creators: name: Kochetov, E. A.
name: Osipov, V. A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: A self-consisting gauge-theory approach to describe Dirac fermions on flexible surfaces with a disclination is formulated. The elastic surfaces are considered as embeddings into R^3 and a disclination is incorporated through a topologically nontrivial gauge field of the local SO(3) group which generates the metric with conical singularity. A smoothing of the conical singularity on flexible surfaces is naturally accounted for by regarding the upper half of two-sheet hyperboloid as an elasticity-induced embedding. The availability of the zero-mode solution to the Dirac equation is analyzed.
description: 6 pages
Supplementary Information for the manuscript from Evaluation of different 16S rRNA gene hypervariable regions and reference databases for profiling engineered microbiota structure and functional guilds in a swine wastewater treatment plant
Creators: name: Lin, Limin
name: Ju, Feng
Publisher: name: The Royal Society
Year: 2023
Subjects: Biotechnology
Environmental Science

description: Supplementary Information includes Supplementary Text, Supplementary Figure and Supplementary Table.
Carcharhiniformes
Creators: name: Alves, Philippe V.
name: Vieira, Fabiano M.
name: Santos, Cláudia P.
name: Scholz, Tomáš
name: Luque, José L.
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Elasmobranchii
Carcharhiniformes

description: Order Carcharhiniformes   Unidentified “dog fish”: Multicalix sp.
description: Published as part of Alves, Philippe V., Vieira, Fabiano M., Santos, Cláudia P., Scholz, Tomáš & Luque, José L., 2015, A Checklist of the Aspidogastrea (Platyhelminthes: Trematoda) of the World, pp. 339-396 in Zootaxa 3918 (3) on page 372, DOI: 10.11646/zootaxa.3918.3.2, http://zenodo.org/record/241203
title: Abdomen agudo por necrosis de la grasa intraabdominal. ¿Qué ha de conocer el radiólogo general?.
Creators: name: Ramos Alcaraz, Blas
Publisher: name: Sociedad Española de Radiología Médica
Year: 2014
Subjects: subject: Inflammation
subject: Diagnostic procedure
subject: Ultrasound
subject: CT
subject: Anatomy
subject: Abdomen

description: Objetivo docente
Revisión del tema
Conclusiones
Bibliografía
description: Objetivo docente:
El dolor abdominal agudo es unasíntoma frecuente en los pacientes que acuden al servicio de Urgencias.
Los procesos que cursan con necrosis grasa intraabdominal suelenpresentar dolor abdominal agudo/subagudo.
Las causas de necrosis grasa...
E pur si muove: Galiliean-invariant cosmological hydrodynamical simulations on a moving mesh
Creators: name: Springel, Volker
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Hydrodynamic cosmological simulations at present usually employ either the Lagrangian SPH technique, or Eulerian hydrodynamics on a Cartesian mesh with adaptive mesh refinement. Both of these methods have disadvantages that negatively impact their accuracy in certain situations. We here propose a novel scheme which largely eliminates these weaknesses. It is based on a moving unstructured mesh defined by the Voronoi tessellation of a set of discrete points. The mesh is used to solve the hyperbolic conservation laws of ideal hydrodynamics with a finite volume approach, based on a second-order unsplit Godunov scheme with an exact Riemann solver. The mesh-generating points can in principle be moved arbitrarily. If they are chosen to be stationary, the scheme is equivalent to an ordinary Eulerian method with second order accuracy. If they instead move with the velocity of the local flow, one obtains a Lagrangian formulation of hydrodynamics that does not suffer from the mesh distortion limitations inherent in other mesh-based Lagrangian schemes. In this mode, our new method is fully Galilean-invariant, unlike ordinary Eulerian codes, a property that is of significant importance for cosmological simulations. In addition, the new scheme can adjust its spatial resolution automatically and continuously, and hence inherits the principal advantage of SPH for simulations of cosmological structure growth. The high accuracy of Eulerian methods in the treatment of shocks is retained, while the treatment of contact discontinuities improves. We discuss how this approach is implemented in our new parallel code AREPO, both in 2D and 3D. We use a suite of test problems to examine the performance of the new code and argue that it provides an attractive and competitive alternative to current SPH and Eulerian techniques. (abridged)
description: updated to agree with accepted version in MNRAS, 67 pages, 50 figures, many of them heavily size-reduced. Full resolution version and videos available at http://www.mpa-garching.mpg.de/~volker/arepo
L'arbitrato estero
Creators: name: Granata, Elena <1978>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2010
Subjects: IUS/15 Diritto processuale civile

description: La tesi tratta l'istituto dell'arbitrato estero sotto la duplice prospettiva internazionale e italiana. 
Particolare attenzione è dedicata alla disciplina dettata in materia dalla Convenzione di New York del 1958 in tema di  riconoscimento e l'esecuzione delle sentenze arbitrali estere, con uno sguardo preferenziale alle interpretazioni e alle applicazioni concrete della stessa in campo internazionale.
Ugualmente si affrontano i temi che maggiormente interessano il fenomeno arbitrale, e segnatamente il regime di circolazione del suo prodotto finale, con particolare attenzione ai rapporti fra il fenomeno arbitrale da un lato e i sistemi giurisdizionali dall'altro (con riferimento all'applicabilità a livello internazionale di principi come la Competence-Competence o il rilievo del meccanismo del forum prorgatum). Illuminata la prospettiva internazionale si analizza l'istituto in chiave interna: dalla definizione del concetto di arbitrato interno ed estero secondo l'ordinamento italiano, all'analisi delle condizioni richieste per il riconoscimento e della relativa procedura, fino ad affrontare gli aspetti ancora discussi, in particolare in relazione al trattamento da riservarsi ai lodi de eadem re e in generale al regime giuridico da riconoscersi alla clausola che preveda arbitrato estero, anche il relazione alle evoluzioni giurisprudenziali e legislative degli ultimi anni. Lo studio si conclude con uno sguardo alla circolabilità extra moenia del prodotto arbitrale italiano.
Supplementary Information for the manuscript from Evaluation of different 16S rRNA gene hypervariable regions and reference databases for profiling engineered microbiota structure and functional guilds in a swine wastewater treatment plant
Creators: name: Lin, Liming
name: Ju, Feng
Publisher: name: The Royal Society
Year: 2023
Subjects: Biotechnology
Environmental Science

description: Supplementary Information includes Supplementary Text, Supplementary Figure and Supplementary Table.
Role of caveolin-1 in the proliferation of solid tumours in vitro
Creators: name: Pancotti, Fabia <1984>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2011
Subjects: MED/04 Patologia generale

description: Caveolin-1 (Cav-1), the essential structural constituent of caveolae, which are flask-shaped invaginations of the plasma membrane, has been found to play a key role in the modulation of cell proliferation and cancer development. It seems to act as an oncosuppressor or a promoter of growth, depending on the histotype, stage and grade of each tumour.
The aim of this study was to analyze the effects of Caveolin-1 gene silencing  on the proliferation of  human lung cancer and osteosarcoma in vitro.
Our data show that Cav-1 silencing  blocks the growth in both metastatic lung cancer cell lines analyzed, suggesting a proliferation promoting action of the protein in these cells. A marked decrease of phospho-Akt, phospho-ERK, STAT3, cyclin D1, CDK4 and consequently of phospho-Rb expression was evident in the cells treated with Cav-1 siRNA. 
With regards to osteosarcoma, we demonstrated that the suppression of Cav-1 results in the blocking of  MG-63 and in the slowing down of HOS proliferation, suggesting a role  for Cav-1 as a promoter of  tumour growth in these cell lines. A marked decrease of phospho-Akt, cyclin E, CDK2 and phospho-Rb and an increase of p21 expression levels were evident in the cells treated with Cav-1 siRNA.
Our results suggest  two new cell cycle inhibiting pathways, mediated by Cav-1 knock-down, and provide new insights into the molecular mechanisms underlying the tumour-promoting role of Cav-1 in lung cancer and osteosarcoma. 
In this work we also investigated the role of estrogens in lung cancer and the functional cross-talk between Cav-1 and estrogens/estrogen receptors in it. 
Our results show that 17β-estradiol induces proliferation either in RAL or in SCLC-R1 cells and that both cell lines are sensitive to 4-OHT antiproliferative effect.
The sensitivity to estrogen stimulation seems to be gender- and/or histological type-independent in metastatic lung cancer in vitro.
Il corretto finanziamento dell'impresa societaria
Creators: name: Prestipino, Marco <1982>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2011
Subjects: IUS/04 Diritto commerciale

description: Nel corso del lavoro sono state affrontare le tematiche relative al finanziamento dell’impresa organizzata in forma societaria, in particolare, approfondendo i profili inerenti al ruolo del socio nelle dinamiche relative all’afflusso di risorse finanziarie alla società partecipata e al rimborso o, a seconda dei casi, alla distribuzione dei corrispondenti valori. 
È  stato analizzato il fenomeno  della sottocapitalizzazione, sottolineando l’importanza, nella prospettiva della tutela dell’integrità del patrimonio sociale e delle pretese dei creditori, della complessiva consistenza del patrimonio netto. Si è cercato di ricostruire la disciplina applicabile alla riserva costituita mediante imputazione dei versamenti in conto capitale. 
Ampia parte della trattazione è stata, poi, dedicata al tema dei finanziamenti dei soci con diritto al rimborso. Più in particolare sono stati  affrontati  il problema dell’individuazione della fattispecie di finanziamento dei soci di s.r.l. di cui all’art. 2467 c.c. e quello della ricostruzione della disciplina applicabile alla suddetta fattispecie. 
Particolare attenzione è stata dedicata  I) all’argomento dell’applicabilità della postergazione legale anche al di fuori di una procedura di liquidazione volontaria o concorsuale II) alla questione delle disciplina applicabile ai finanziamenti postergati nella liquidazione volontaria III) alla disciplina dei crediti postergati nel fallimento. 
Un certo spazio è stato poi riservato al tema dell’applicabilità dell’art. 2467, comma,1 ai finanziamenti concessi nell’ambito dell’esercizio di attività di direzione e coordinamento; per poi concludere con un’analisi critica della questione dell’applicabilità analogica dell’art. 2467 c.c. alle società per azioni con compagine sociale coesa e ristretta
On thermalization in Kitaev's 2D model
Creators: name: Alicki, R.
name: Fannes, M.
name: Horodecki, M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The thermalization process of the 2D Kitaev model is studied within the Markovian weak coupling approximation. It is shown that its largest relaxation time is bounded from above by a constant independent of the system size and proportional to $\exp(2Δ/kT)$ where $Δ$ is an energy gap over the 4-fold degenerate ground state. This means that the 2D Kitaev model is not an example of a memory, neither quantum nor classical.
description: 26 pages
Anisotropic topological superconductivity in Josephson junctions
Creators: name: Pekerten, Barış
name: Pakizer, Joseph D.
name: Hawn, Benjamin
name: Matos-Abiague, Alex
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We investigate the effects of magnetic and crystalline anisotropies on the topological superconducting state of planar Josephson junctions (JJs). In junctions where only Rashba spin-orbit coupling (SOC) is present, the topological phase diagram is insensitive to the supercurrent direction, but exhibits a strong dependence on the magnetic field orientation. However, when both Rashba and Dresselhaus SOCs coexist, the topological phase diagram strongly depends on both the magnetic field and junction crystallographic orientations. We examine the impact of the magnetic and crystalline anisotropy on the current-phase relation (CPR), energy spectrum, and topological gap of phase-biased JJs, where the junction is connected in a loop and the superconducting phase difference is fixed by a loop-threading magnetic flux. The anisotropic CPR can be used to extract the ground-sate phase (i.e. the superconducting phase difference that minimizes the system free energy) behavior in phase-unbiased JJs with no magnetic flux. Under appropriate conditions, phase-unbiased JJs can self-tune into or out of the topological superconducting state by rotating the in-plane magnetic field. The magnetic field orientations at which topological transitions occur strongly depend on both the junction crystallographic orientation and the relative strength between Rashba and Dresselhaus SOCs. We find that for an optimal practical application, in which the junction exhibits topological superconductivity with a sizable topological gap, a careful balancing of the magnetic field direction, the junction crystallographic orientation, and the relative strengths of the Rashba and Dresselhaus SOCs is required. We discuss the considerations that must be undertaken to achieve this balancing for various junction types and parameters.
description: 12 pages, 9 figures
A spectroscopic and photometric study of stellar populations in a sample of clusters in the Magellanic Clouds
Creators: name: Mucciarelli, Alessio <1980>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2008
Subjects: FIS/05 Astronomia e astrofisica

description: This Ph.D. Thesis has been carried out in the framework of a long-term and large project
devoted to describe the main photometric, chemical, evolutionary and integrated properties of
a representative sample of Large and Small Magellanic Cloud (LMC and SMC respectively)
clusters. The globular clusters system of these two Irregular galaxies provides a rich resource for
investigating stellar and chemical evolution and to obtain a detailed view of the star formation
history and chemical enrichment of the Clouds. The results discussed here are based on the
analysis of high-resolution photometric and spectroscopic datasets obtained by using the last
generation of imagers and spectrographs. The principal aims of this project are summarized as
follows:
• The study of the AGB and RGB sequences in a sample of MC clusters, through the analysis
of a wide near-infrared photometric database, including 33 Magellanic globulars obtained
in three observing runs with the near-infrared camera SOFI@NTT (ESO, La Silla).
• The study of the chemical properties of a sample of MCs clusters, by using optical and
near-infrared high-resolution spectra. 3 observing runs have been secured to our group
to observe 9 LMC clusters (with ages between 100 Myr and 13 Gyr) with the optical
high-resolution spectrograph FLAMES@VLT (ESO, Paranal) and 4 very young (<30
Myr) clusters (3 in the LMC and 1 in the SMC) with the near-infrared high-resolution
spectrograph CRIRES@VLT.
• The study of the photometric properties of the main evolutive sequences in optical Color-
Magnitude Diagrams (CMD) obtained by using HST archive data, with the final aim of
dating several clusters via the comparison between the observed CMDs and theoretical
isochrones. The determination of the age of a stellar population requires an accurate
measure of the Main Sequence (MS) Turn-Off (TO) luminosity and the knowledge of the
distance modulus, reddening and overall metallicity. For this purpose, we limited the study
of the age just to the clusters already observed with high-resolution spectroscopy, in order
to date only clusters with accurate estimates of the overall metallicity.
The tip of the iceberg: the frequency content of the Delta Sct star HD 50844 from CoRoT space photometry
Creators: name: Poretti, E.
name: Mantegazza, L.
name: Rainer, M.
name: Uytterhoeven, K.
name: Michel, E.
name: Baglin, A.
name: Auvergne, M.
name: Catala, C.
name: Samadi, R.
name: Rodriguez, E.
name: Garrido, R.
name: Amado, P.
name: Martin-Ruiz, S.
name: Moya, A.
name: Suarez, C.
name: Baudin, F.
name: Zima, W.
name: Alvarez, M.
name: Mathias, P.
name: Paparo, M.
name: Papics, P.
name: Plachy, E.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: It has been suggested that the detection of a wealth of very low amplitude modes in Delta Sct stars was only a matter of signal--to--noise ratio. Access to this treasure, impossible from the ground, is one of the scientific aims of the space mission CoRoT, developed and operated by CNES. This work presents the results obtained on HD 50844: the 140,016 datapoints allowed us to reach the level of 10^{-5} mag in the amplitude spectra. The frequency analysis of the CoRoT timeseries revealed hundreds of terms in the frequency range 0--30 d^{-1}. The initial guess that Delta Sct stars have a very rich frequency content is confirmed. The spectroscopic mode identification gives theoretical support since very high--degree modes (up to ell=14) are identified. We also prove that cancellation effects are not sufficient in removing the flux variations associated to these modes at the noise level of the CoRoT measurements. The ground--based observations indicate that HD 50844 is an evolved star that is slightly underabundant in heavy elements, located on the Terminal Age Main Sequence. The predominant term (f_1=6.92 d^{-1}) has been identified as the fundamental radial mode combining ground-based photometric and spectroscopic data. This work is based on observations made with ESO telescopes under the Large Programme LP 178.D-0361.
description: Proceedings of the International Conference "Stellar Pulsation: Challenges for Theory and Observation", AIP, Vol.1170, p. 435
Costruzione di uno scaffold vascolarizzato per la chirurgia ortopedica
Creators: name: Pellacani, Andrea <1973>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2008
Subjects: MED/33 Malattie apparato locomotore

description: Specific aims
The aim is to improve the treatment of the bone losses at the metacarpal bones level (both
diaphysis and epiphysis) combining microsurgery, tissue engineering and biomaterials, so to
minimize the donor side morbidity and optimize healing and outcomes.
Methods
Pre-operative controlateral X-ray or 3-D CT to allow custom-made HA scaffolds. Cement as
temporary spacer in acute lesion and monitoring of infective risks. Treatment of the bone loss
recurring to pre-fabricated or custom-made HA scaffolds, adding platelet gel or growth factor
OP1. Stable synthesis. Control group with auto/omografts. Outcome indices: % of bone-union;
finger TAM, Kapandji, DASH score; NMR and Scintigraphy at 180 days for revascularisation
and bio-substitution of the scaffold.
Preliminary results
The authors just treated 6 patients, 4 males and 2 females, with an average age of 38.5 yrs,
affected by segmental bone losses at the hand and wrist, recurring to pre-fabricated not
vascularised scaffolds. In all cases the synthesis was performed with angular stability plates and
a stable synthesis achieved. All patients have been controlled at a mean follow-up of 10.5
months (from 2 to 16 ). In all case but one the bone-scaffold osteo-integration was achieved at an
average of 38 days at the hand, and 46 days at the wrist. The outcome studies, according to the
DASH score, finger TAM, and Kapandji, were good and excellent in 5 cases, poor in one.
Exploring yttrium doped C$_{24}$ fullerene as a high-capacity reversible hydrogen storage material: DFT investigations
Creators: name: Mahamiya, Vikram
name: Shukla, Alok
name: Chakraborty, Brahmananda
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Atomic and Molecular Clusters (physics.atm-clus)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: By employing the state-of-the-art density functional theory, we report the hydrogen storage capability of yttrium decorated C$_{24}$ fullerene. Single Y atom attached on C$_{24}$ fullerene can reversibly adsorb a maximum number of 6 H$_2$ molecules with average adsorption energy -0.37 eV and average desorption temperature 477 K, suitable for fuel cell applications. The gravimetric weight content of hydrogen is 8.84 %, which exceeds the target value of 6.5 wt % H by the department of energy (DoE) of the United States. Y atom is strongly bonded to C$_{24}$ fullerene with a binding energy of -3.4 eV due to a charge transfer from Y-4d and Y-5s orbitals to the C-2p orbitals of C$_{24}$ fullerene. The interaction of H$_2$ molecules with the Y atom is due to the Kubas type interaction involving a charge donation from the metal d orbital to H 1s orbital, and back donation causing slight elongation of H-H bond length. The stability of the system at the highest desorption temperature is confirmed by ab-initio molecular dynamics simulations, and the metal-metal clustering formation has been investigated by computing the diffusion energy barrier for the movement of Y atoms. We have corrected all the calculated energies for the van der Waals (vdW) interactions by applying the dispersion energy corrections, in addition to the contribution of the GGA exchange-correlation functional. The C$_{24}$+Y system is stable at room temperature, and at the highest desorption temperature, the presence of a sufficient diffusion energy barrier prevents metal-metal clustering. Furthermore, binding energies of H$_2$ are within the target value by DoE (-0.2-0.7 eV/H$_2$ ), while H$_2$ uptake (8.84 % H) is higher than DoE's criteria. Therefore, we propose that Y decorated C$_{24}$ fullerene can be tailored as a practically viable potential hydrogen storage candidate.
description: 44 pages, 12 figures, including the supporting information
Inhomogeneous phases in the chirally imbalanced $2+1$-dimensional Gross-Neveu model and their absence in the continuum limit
Creators: name: Pannullo, Laurin
name: Wagner, Marc
name: Winstel, Marc
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We study the $μ$-$μ_{45}$-$T$ phase diagram of the $2+1$-dimensional Gross-Neveu model, where $μ$ denotes the ordinary chemical potential, $μ_{45}$ the chiral chemical potential and $T$ the temperature. We use the mean-field approximation and two different lattice regularizations with naive chiral fermions. An inhomogeneous phase at finite lattice spacing is found for one of the two regularizations. Our results suggest that there is no inhomogeneous phase in the continuum limit. We show that a chiral chemical potential is equivalent to an isospin chemical potential. Thus, all results presented in this work can also be interpreted in the context of isospin imbalance.
description: 18 pages, 7 figures, 1 table; plot data provided in arXiv source; version as published in symmetry
Electron spectroscopy using metastable helium atoms (2¹S,2³S) and 584 Å photons
Creators: name: Yee, Derek Sui Chang
Publisher: name: University of British Columbia
Year: 2010

description: Electron spectroscopy using metastable helium atoms (2¹S,2³S) and 584 Å photons Using a high resolution 127 degree electron analyzer, a quantitative comparison has been made of the He* (21S,23S) Penning electron and the 584 % photoelectron spectra of thirty molecules (H₂, HD, D₂, N₂, CO, NO, O₂, NH₃, PH₃, C₂H₄, HCN, (CN)₂, CH₃CN, BrCN, ICN, H₂O, CH₃OH, CH₃CH₂OH, (CH₃)₂CHOH, (CH₃)₃COH, CH₃OCH₃, CH₂OCH₂, CH₃CH₂OCH₂CH₃, CH₂CH₂OCH₂CH₂, OCH₂CH₂OCH₂ CH₂, HCHO, CH₃CHO, CH₃COCH₃, HCOOH and CH₃COOH). Where vibrational structure has been resolved, the vibrational spacings are observed to be the same (within experimental error) for both modes of ionization. In addition, the relative vibrational intensities for ionic states of the diatomic molecules (except for O₂) were found to be the same for both modes of ionization. For the process He*(2³S)/O⁺₂ (X²πg), an observed difference of the vibrational envelope for He*(2³S) Penning ionization and 584 Å photoionization has been traced to an autoionizing level of O₂ which is essentially resonant with the He*(2³S) metastable energy. Differences between the vibrational envelopes for Penning ionization and photoionization have also been observed for the ground ionic state of a number of oxygen containing molecules. These differences have been explained by pertubations of the potential surface of the target molecule due to the presence of the metastable atom. When comparing the relative electronic state populations for the two modes of ionization, large differences were observed. Some of the difference has been explained by the fact that the state populations are a function of the excitation energy, since comparisons were made between photons with the energy 21.22 eV and metastable atoms with the energies 20.62 eV and 19.82 eV. For the -C≡N containing molecules it was observed that the ratios of the relative populations of states corresponding to the removal of π bonding to nitrogen lone pair were significantly greater for photoionization than for Penning ionization. Finally, the energy shifts ΔE[sub obs] were measured for the obs He*(2¹S,2³S) Penning ionization process. When vibrational structure was apparent in the electron spectra, it was possible to evaluate the true AE energy shift ΔE[sub obs]. The magnitude of the true ΔE energy shift was found to be of thermal energies.
Sharp quantitative isoperimetric inequalities in the $L^1$ Minkowski plane
Creators: name: Kloeckner, Benoit
Publisher: name: arXiv
Year: 2009
Subjects: subject: Functional Analysis (math.FA)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 51M16, 51M25, 49Q20

description: We prove that a plane domain which is almost isoperimetric (with respect to the $L^1$ metric) is close to a square whose sides are parallel to the coordinates axis. Closeness is measured either by $L^\infty$ Haussdorf distance or Fraenkel asymmetry. In the first case, we determine the extremal domains.
description: 9 pages
Phonon-limited Transport and Fermi Arc Lifetime in Weyl Semimetals
Creators: name: Buccheri, Francesco
name: De Martino, Alessandro
name: Pereira, Rodrigo G.
name: Brouwer, Piet W.
name: Egger, Reinhold
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Weyl semimetals harbor topological Fermi-arc surface states which determine the nontrivial charge current response to external fields. We here study the quasiparticle decay rate of Fermi arc states arising from their coupling to acoustic phonons, as well as the phonon-limited conductivity tensor for a clean Weyl semimetal slab. Using the phonon modes for an isotropic elastic continuum with a deformation potential coupling to electrons, we determine the temperature dependence of the quasiparticle decay rate, both near and far away from the arc termination points. By solving the coupled Boltzmann equations for the bulk and arc state distribution functions in the slab geometry, we show how the linear response conductivity depends on key parameters such as the temperature, the chemical potential, the geometric shape of the Fermi arcs, or the slab width. The chiral nature of Fermi arc states causes an enhancement of the longitudinal conductivity along the chiral direction at low temperatures, together with a 1/T^2 scaling regime at intermediate temperatures without counterpart for the conductivity along the perpendicular direction.
description: 27 pages, 6 figures. Accepted version
Introductory Remarks on Max Weber’s The Economic Ethics of the World Religions
Creators: name: Tyrell, Hartmann
Publisher: name: Università degli Studi di Firenze
Year: 2014

description: In Tyrell’s view, too little attention has been paid by Weber scholars to Max Weber’s ‘Economic Ethics of the World Religions’. The principal cause is that the studies of the ‘Economic Ethics’ have remained a torso, where the Occidental part, above all, is missing. Regrettably the essay collections edited by W. Schluchter and the debate provoked by S.N. Eisenstadt regarding ‘Kulturen der Achsenzeit’ have made little difference here, but the same is also true of the volumes which have so far appeared within the Max Weber Gesamtausgabe. Tyrell’s contribution is thus concerned (on the one hand) to determine the position of the ‘Economic Ethics’ within Weber’s sociology of religion, but (on the other hand) it also seeks to show what it is that “connects” the studies of the ‘Economic Ethics’, so as to counteract the impression that, at any one moment, we are dealing with “isolated pieces of work” in the form of monographs regarding particular world religions.
description: SocietàMutamentoPolitica, Vol 5, N° 9 (2014): 1864-2014 – Max Weber: a Contemporary Sociologist
Additional file 15 of De novo genome assembly of a foxtail millet cultivar Huagu11 uncovered the genetic difference to the cultivar Yugu1, and the genetic mechanism of imazethapyr tolerance
Creators: name: Wang, Jie
name: Li, Shiming
name: Lan, Lei
name: Xie, Mushan
name: Cheng, Shu
name: Gan, Xiaolong
name: Huang, Gang
name: Du, Guohua
name: Yu, Kang
name: Ni, Xuemei
name: Liu, Baolong
name: Peng, Guoxiong
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 15: Table S7. Mapping reads to the genome assembly.
Quasinormal modes of Proca fields in a Schwarzschild-AdS spacetime
Creators: name: Fernandes, Tiago V.
name: Hilditch, David
name: Lemos, José P. S.
name: Cardoso, Vitor
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present new results concerning the Proca massive vector field in a Schwarzschild-AdS black hole geometry. We provide a first principles analysis of Proca vector fields in this geometry using both the vector spherical harmonic (VSH) separation method and the Frolov-Krtouš-Kubizňák-Santos (FKKS) method that separates the relevant equations in spinning geometries. The analysis in the VSH method shows, on one hand, that it is arduous to separate the scalar-type from the vector-type polarizations of the electric sector of the Proca field, and on the other hand, it displays clearly the electric and the magnetic mode sectors. The analysis in the FKKS method is performed by taking the nonrotating limit of the Kerr-AdS spacetime, and shows that the ansatz decouples the polarizations in the electric mode sector even in the nonrotating limit. On the other hand, it captures only two of the three possible polarizations, the magnetic mode sector is missing. The reason for the absence of this polarization is related to the degeneracy of the principal tensor in static spherical symmetric spacetimes. The degrees of freedom and quasinormal modes in both separation methods of the Proca field are found. The frequencies of the quasinormal modes are also computed. For the electric mode sector in the VSH method the frequencies are found through an extension, which substitutes number coefficients by matrix coefficients, of the Horowitz-Hubeny numerical procedure, whereas for the magnetic mode sector in the VSH method and the electric sector of the FKKS method it is shown that a direct use of the procedure can be made. The values of the quasinormal mode frequencies obtained for each method are compared and showed to be in good agreement with each other. This further supports the analytical approaches presented here for the behavior of the Proca field in a Schwarzschild-AdS black hole background.
description: 15 pages, 4 tables, 1 appendix with 2 figures