cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: On the Maximum Number of Switches Between Two Production Systems
Creators: name: Bharadwaj, Krishna
Year: 2017

description: Mit persönlicher Widmung der Verfasserin.
description: Kopie Sonderdruck, beidseitig bedruckt, verkleinert auf 2 Seiten pro Seite, 6 Blätter, paginiert 409-429
title: Two Views on Oligopoly and Stagnation
Creators: name: Boitani, Andrea
Year: 2017

description: Mit persönlicher Widmung des Verfassers. - Draft.
description: Kopie (2 Seiten auf ein Blatt), 19 Blätter, paginiert 2-38, mit handschriftlicher Anstreichung auf Seite 11
A Schanuel property for exponentially transcendental powers
Creators: name: Bays, Martin
name: Kirby, Jonathan
name: Wilkie, A. J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Number Theory (math.NT)
subject: Logic (math.LO)
subject: FOS: Mathematics
subject: 11J91, 03C64

description: We prove the analogue of Schanuel's conjecture for raising to the power of an exponentially transcendental real number. All but countably many real numbers are exponentially transcendental. We also give a more general result for several powers in a context which encompasses the complex case.
description: 5 pages
The Connection between Mergers and AGN Activity in Simulated and Observed Massive Galaxies
Creators: name: Sharma, Ray S.
name: Choi, Ena
name: Somerville, Rachel S.
name: Snyder, Gregory F.
name: Kocevski, Dale D.
name: Hirschmann, Michaela
name: Moster, Benjamin P.
name: Naab, Thorsten
name: Narayanan, Desika
name: Ostriker, Jeremiah P.
name: Rosario, David J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We analyze a suite of $30$ high resolution zoom-in cosmological hydrodynamic simulations of massive galaxies with stellar masses $M_{\ast} > 10^{10.9} M_\odot$, with the goal of better understanding merger activity in AGN, AGN activity in merging systems, SMBH growth during mergers, and the role of gas content. Using the radiative transfer code \textsc{Powderday}, we generate HST-WFC3 F160W synthetic observations of redshift $0.5 < z < 3$ central galaxies, add noise properties similar to the CANDELS survey, and measure morphological properties from the synthetic images using commonly adopted non-parametric statistics. We compare the distributions of morphological properties measured from the synthetic images with a sample of inactive galaxies and X-ray selected AGN hosts from CANDELS. We study the connection between mergers and AGN activity in the simulations, the synthetic images, and the observed CANDELS sample. We find that, in both the simulations and CANDELS, even the most luminous $(L_{\rm bol} > 10^{45}$ erg s$^{-1})$ AGN in our sample are no more likely than inactive galaxies $(L_{\rm bol} < 10^{43}$ erg s$^{-1})$ to be found in merging systems. We also find that AGN activity is not overall enhanced by mergers, nor enhanced at any specific time in the $1$ Gyr preceding and following a merger. Even gas rich major mergers (stellar mass ratio $>$1:4) do not necessarily enhance AGN activity or significantly grow the central SMBH. We conclude that in the simulated massive galaxies studied here, mergers are not the primary drivers of AGN.
title: A macrodynamic theory of business cycle
Creators: name: Kalecki, Michał
Year: 2017
Subjects: subject: Kalecki, Michal (1899-1970) Konjunkturzyklus

description: Kopie des Sonderdrucks, 2 Seiten auf ein Blatt, 10 Blätter, mit handschriftlicher Skizze auf Blatt 5, paginiert 326-345
title: The "Megacorp": Eichner's Contribution to the Theory of the Firm
Creators: name: Shapiro, Nina
Year: 2017

description: Prepared for the AFEE Session on The Megacorp and Macrodynamics: the Heterodox Perspective of Alfred Eichner, December 12, 1989 Atlanta, Georgia.
description: Typoskript, 11 Blätter (Titelblatt und die Seiten 1-10), handschriftliche Anstreichung von Josef Steindl auf Seite 9
Explicit blowing up solutions for a higher order parabolic equation with Hessian nonlinearity
Creators: name: Escudero, Carlos
Publisher: name: arXiv
Year: 2021
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: In this work we consider a nonlinear parabolic higher order partial differential equation that has been proposed as a model for epitaxial growth. This equation possesses both global-in-time solutions and solutions that blow up in finite time, for which this blow-up is mediated by its Hessian nonlinearity. Herein, we further analyze its blow-up behaviour by means of the construction of explicit solutions in the square, the disc, and the plane. Some of these solutions show complete blow-up in either finite or infinite time. Finally, we refine a blow-up criterium that was proved for this evolution equation. Still, existent blow-up criteria based on a priori estimates do not completely reflect the singular character of these explicit blowing up solutions.
Measurements using a prototype array of plastic scintillator bars for reactor based electron anti-neutrino detection
Creators: name: Netrakanti, P. K.
name: Mulmule, D.
name: Mishra, D. K.
name: Behera, S. P.
name: Dey, R.
name: Sehgal, R.
name: Sinha, S. K.
name: Jha, V.
name: Pant, L. M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: High Energy Physics - Experiment (hep-ex)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: We report measurement of reactor based electron anti-neutrinos from a prototype array of plastic scintillator bars ( mini-ISMRAN ) located inside Dhruva research reactor hall, BARC. The detector setup took data for 128 days for reactor on (RON) and 51 days for reactor off (ROFF) condition. A detailed analysis procedure is developed to select the anti-neutrino candidate events based on the energy deposition, number of bars hit as well as topological event selection criteria in position and time. Each of these selection criteria are compared with Monte Carlo based simulations and further an embedding technique is used to estimate the efficiencies from a data driven background study. The obtained anti-neutrino like events in RON condition are 218 $\pm$ 50 (stat) $\pm$ 37 (sys) after background subtraction. The obtained results are compared with theoretical estimation which yields 214 $\pm$ 32 (sys) anti-neutrino events for the RON condition.
description: 25 pages, 20 figures
MPEC 2023-K186 : DAILY ORBIT UPDATE (2023 May 29)
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Validity of equivalent photon spectra and the photoproduction processes in p-p collisions
Creators: name: Ma, Zhi-Lei
name: Lu, Zhun
name: Zhang, Li
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Through a consistent analysis of the terms neglected in going from the accurate expression to the one of Weizsäcker-Williams approximation (WWA), the validity of equivalent photon spectra is studied, and a modified photon flux of proton is also derived. We take the photoproductions of photons and dileptons as examples, to provide the comparison between the exact results and the ones based on various photon fluxes. We present the results for the distributions in $Q^{2}$ (virtuality of photons), $y$ and $p_{T}$, the total cross sections are also estimated. The numerical results show that the modified equivalent photon spectrum reproduces the exact result within less than one percent. And the corrections of photoproduction processes to the dileptons and photons productions are about $20\%$.
description: 24 pages, 8 Figures, 4 Tables
Analyticity of quasinormal modes in the Kerr and Kerr-de Sitter spacetimes
Creators: name: Petersen, Oliver
name: Vasy, András
Publisher: name: arXiv
Year: 2021
Subjects: subject: Analysis of PDEs (math.AP)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 35L05, 35P25, 58J45, 83C30

description: We prove that quasinormal modes (or resonant states) for linear wave equations in the subextremal Kerr and Kerr-de Sitter spacetimes are real analytic. The main novelty of this paper is the observation that the bicharacteristic flow associated to the linear wave equations for quasinormal modes with respect to a suitable Killing vector field has a stable radial point source/sink structure rather than merely a generalized normal source/sink structure. The analyticity then follows by a recent result in the microlocal analysis of radial points by Galkowski and Zworski. The results can then be recast with respect to the standard Killing vector field.
description: 24 pages, final version
ISIDORE celebrates its 10th anniversary
Creators: name: POUYLLAU, Stéphane
name: MINEL, Jean-Luc
name: CAPELLI, Laurent
name: SAURET, Nicolas
name: BUNEL, Mélanie
name: BAUDE, Olivier
name: JOUGUET, Hélène
name: BUSONERA, Pauline
name: DESSEIGNE, Adrien
Publisher: name: Zenodo
Year: 2021
Subjects: search engine
discovery tool
academic social network
topic modelling
neural networks
humanities
social science
ISIDORE
EOSC
Open Access
Open Science
multilingual diversity
researchers

description: In 2011, the first version of ISIDORE was published. Its 10th anniversary is an opportunity to recall the history of the project and to present its future out- lines, currently being defined within the framework of the “Huma-Num Open Science” program. This year ISIDORE passed the 10 million mark in terms of documents and data indexed, enriched and categorized from more than 9000 databases and data repositories worldwide. More than 2000 researchers already have an account, taking advantage of the many customizable scientific monitor- ing and discovery features.
Frobenius templates in certain $2 \times 2$ matrix rings
Creators: name: Eller, Timothy
name: Kraus, Jakub
name: Takahashi, Yuki
name: Zhang, Zhichun Joy
Publisher: name: arXiv
Year: 2021
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics

description: The classical Frobenius problem is to find the largest integer that cannot be written as a linear combination of a given set of positive, coprime integers using nonnegative integer coefficients. Prior work has generalized the classical Frobenius problem from integers to Frobenius problems in other rings. This paper explores Frobenius problems in various rings of (upper) triangular $2 \times 2$ matrices with constant diagonal.
Ácido Esteárico: Análise espectral
Creators: name: RIBAS, ASAF
Publisher: name: Zenodo
Year: 2023

description: Apresentação em Reunião presencial do grupo de pesquisa edital FAPERO 2022/2023 abordando características do espectro ácido Esteárico, com o título: Ácido Esteárico: Análise espectral.
Infection
Creators: name: Zhou, Jiandong
name: Tse, Gary
name: Lee, Sharen
name: Liu, Tong
Publisher: name: Zenodo
Year: 2020

description: Analysis of incidence and outcomes for coronavirus 19 infection. Disclaimer: These datasets were generated during the course of academic research which received ethics approval by Institutional Review Board of the University of Hong Kong/Hospital Authority Hong Kong West Cluster (HKU/HA HKW IRB). They have been anonymised and are deposited for further advancement of medical research in full compliance with The HKU Policy on the Management of Research Data and Records sets several conditions for the retention and storage of research data. For additional information: http://www.rss.hku.hk/integrity/research-data-records-management "The minimum retention period for research data and records is three years after publication or public release of the work of the research. In many instances, researchers will resolve to retain research data and records for a longer period than the minimum requirement." Access is permitted for research purposes only. The use of these datasets should provide acknowledgements of such efforts by citing this DOI.
The south Yorkshire coalminers, 1870-1914 : a study of social and occupational cohesion
Creators: name: Wolfe, Celia Mary
Publisher: name: University of British Columbia
Year: 2010

description: The coalminers as a social and occupational group have always been referred to by historians as a "race apart," living in communities which were both physically and culturally isolated from other working-class groups. In order to distinguish and examine the special circumstances and characteristics which set them apart from the rest of the working class, the present thesis stresses a number of problems: male and female roles; the family; the special place of women in the family; working and living conditions; and the special attitudes and outlooks that these conditions fostered. Although the sources examined are drawn from all coalfields, the study focuses on the relatively new South Yorkshire coalfield which has not yet been studied in a systematic fashion. During the last three decades of the nineteenth century and the early part of the twentieth century, the South Yorkshire coalfield underwent its period of most rapid expansion. While this coalfield was newer than the others, its miners exhibited similar features to those of the older coalfields, and it is not my aim to prove that they were different. Rather, the South Yorkshire coalfield is used as a model to identify some social aspects of life in a coalmining community. In addition, the study attempts to contrast the environment of the coalminers with that of other working-class groups. Demographic material is derived from the Census Reports, and studies of living and working conditions from Government reports, eye-witness accounts of social investigators, autobiographies of coalminers and personal memoirs, contemporary newspaper reports, and relevant secondary works. Despite the influx of new immigrants into the new or expanding coalmining towns and villages, they rapidly came to exhibit patterns to be found in older coalmining communities. The most impressive mark of a coalmining town was its distinctive social solidarity and cohesion. These strong social bonds were engendered and maintained by a common identity produced by occupational dependency upon the pit, and by the camaraderie fostered by shared living and working experiences. The need for cooperation under dangerous working conditions, the communal struggle against an unfavourable environment, the economic insecurity of pit-life, the limitations enforced upon women by the lack of employment opportunities, the traditional commitment to large families! These factors ensured a common pool of experiences and a common set of expectations. The coalmining communities were marked by a unique culture and outlook on life. These features of coalmining served to isolate its populations even more from other working-class groups and offer an explanation for the view which has been advanced by labour historians that the radicalism of the coalminers was restricted to their particular needs and interests, and eschewed a total working-class solidarity, which was the goal of the organized working-class movement in Britain.
Stability of the Einstein static universe in presence of vacuum energy
Creators: name: Carneiro, Saulo
name: Tavakol, Reza
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The Einstein static universe has played a central role in a number of emergent scenarios recently put forward to deal with the singular origin of the standard cosmological model. Here we study the existence and stability of the Einstein static solution in presence of vacuum energy corresponding to conformally-invariant fields. We show that the presence of vacuum energy stabilizes this solution by changing it to a centre equilibrium point, which is cyclically stable. This allows non-singular emergent cosmological models to be constructed in which initially the universe oscillates indefinitely about an initial Einstein static solution and is thus past eternal.
description: Some references added
Podocinum stellatum Ma & Wang 1998
Creators: name: Barros, Avyla R. A.
name: Castilho, Raphael C.
name: De Moraes, Gilberto J.
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Mesostigmata
Podocinidae
Podocinum
Podocinum stellatum

description: 32. Podocinum stellatum Ma & Wang, 1998 Podocinum stellatum Ma & Wang, 1998: 4. Podocinum stellatum.— Ho et al., 2009: 91; Yan et al., 2011: 55; 2012: 46. Type depository. National Base of Plague and Brucellosis Control, Baicheng City, Jilin Province, China. Type locality and habitat. China, Mount Emei (29°32’N, 103°19’E), Sichuan Province, 6 July 1985, under fallen leaves.
description: Published as part of Barros, Avyla R. A., Castilho, Raphael C. & De Moraes, Gilberto J., 2020, Catalogue of the mite family Podocinidae Berlese (Acari: Mesostigmata), pp. 141-156 in Zootaxa 4802 (1) on page 152, DOI: 10.11646/zootaxa.4802.1.9, http://zenodo.org/record/3904968
description: {"references": ["Ma, L. - M. & Wang, S. - R. (1998) Three new species of gamasid mites from inner Mongolia and Sichuan, China (Acari: Hypoaspis, Veigaia, Podocinum). Acta Arachnologica Sinica, 7, 1 - 6. [in Chinese]", "Ho, C. - C., Ma, L. - M. & Wang, S. - C. (2009) A new species and two new records of Podocinum (Berlese, 1882) from Taiwan (Podocinidae: Mesostigmata). Formosan Entomologist, 29, 83 - 94.", "Yan, Y., Jin, D. - C., Guo, X. - G. & Guo, J. - J. (2011) A new species of Podocinum Berlese (Acari: Podocinidae) and a key to species of the genus from China. Zootaxa, 3001, 49 - 56. https: // doi. org / 10.11646 / zootaxa. 3001.1.3", "Yan, Y., Jin, D. - C., Wu, D., Guo, J. - J. & Guo, X. - G. (2012) A revised checklist and key to the genus Podocinum Berlese (Acari: Podocinidae) with description of a new species from Tibet, Southwest China. Zootaxa, 3194 (1), 35 - 48. https: // doi. org / 10.11646 / zootaxa. 3194.1.2"]}
On the uniqueness of almost-Kaehler structures
Creators: name: diScala, A. J.
name: Nagy, Paul-Andi
Publisher: name: arXiv
Year: 2010
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53B20, 53C25

description: We show uniqueness up to sign of positive, orthogonal almost-Kaehler structures on any non-scalar flat Kaehler-Einstein surface.
description: 4 pages, to appear in CRAS
Theoretical study of infrared spectra of interstellar PAH molecules with N, NH & NH$_2$ incorporation
Creators: name: Vats, Akant
name: Pathak, Amit
name: Onaka, Takashi
name: Buragohain, Mridusmita
name: Sakon, Itsuki
name: Endo, Izumi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: This work presents theoretical calculations of infrared spectra of nitrogen (N)-containing polycyclic aromatic hydrocarbon (PAH) molecules with incorporation of N, NH and NH$_2$ using density functional theory (DFT). The properties of their vibrational modes in 2--15 $μ\rm m$ are investigated in relation to the Unidentified Infrared (UIR) bands. It is found that neutral PAHs, when incorporated with NH$_2$ and N (at inner positions), produce intense infrared bands at 6.2, 7.7 and 8.6 $μ\rm m$ that have been normally attributed to ionized PAHs so far. The present results suggest that strong bands at 6.2 and 11.2 $μ\rm m$ can arise from the same charge state of some N-containing PAHs, arguing that there might be some N-abundant astronomical regions where the 6.2 to 11.2 $μ\rm m$ band ratio is not a direct indicator of PAHs' ionization. PAHs with NH$_2$ and N inside the carbon structure show the UIR band features characteristic to star-forming regions as well as reflection nebulae (Class A), whereas PAHs with N at the periphery have similar spectra to the UIR bands seen in planetary nebulae and post-AGB stars (Class B). The presence of N atom at the periphery of a PAH may attract H or H$^{+}$ to form N-H and N-H$_2$ bonds, exhibiting features near 2.9--3.0 $μ\rm m$, which are not yet observationally detected. The absence of such features in the observations constrains the contribution of NH and NH$_2$ substituted PAHs that could be better tested with concentrated observations in this range. However, PAHs with N without H either at the periphery or inside the carbon structure do not have the abundance constraint due to the absence of 2.9--3.0 $μ\rm m$ features and are relevant in terms of positions of the UIR bands. Extensive theoretical and experimental studies are required to obtain deeper insight.
High Energy Irradiation Effects on Silicon Photonic Passive Devices
Creators: name: Zhou, Yue
name: Bi, Dawei
name: Wang, Songlin
name: Wu, Longsheng
name: Huang, Yi
name: Zhang, Enxia
name: Fleetwood, Daniel M.
name: Wu, Aimin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: In this work, the radiation responses of silicon photonic passive devices built in silicon-on-insulator (SOI) technology are investigated through high energy neutron and 60Co gamma-ray irradiation. The wavelengths of both micro-ring resonators (MRRs) and Mach-Zehnder interferometers (MZIs) exhibit blue shifts after high-energy neutron irradiation to a fluence of 1*1012 n/cm2; the blue shift is smaller in MZI devices than in MRRs due to different waveguide widths. Devices with SiO2 upper cladding layer show strong tolerance to irradiation. Neutron irradiation leads to slight changes in the crystal symmetry in the Si cores of the optical devices and accelerated oxidization for devices without SiO2 cladding. A 2 um top cladding of SiO2 layer significantly improves the radiation tolerance of these passive photonic devices.
Podocinum tibetensis Yan, Jin, Wu, Guo & Guo 2012
Creators: name: Barros, Avyla R. A.
name: Castilho, Raphael C.
name: De Moraes, Gilberto J.
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Mesostigmata
Podocinidae
Podocinum
Podocinum tibetensis

description: 36. Podocinum tibetensis Yan, Jin, Wu, Guo & Guo, 2012 Podocinum tibetensis Yan, Jin, Wu, Guo & Guo, 2012: 36. Type depository. Institute of Entomology, Guizhou University, Guiyang, China. Type locality and habitat. China, Bome County (29°53’ N, 95°40’ E; alt. 2726 m), Nyingchi, Tibet Autonomous Region, 25 August 2010, in litter under pine tree.
description: Published as part of Barros, Avyla R. A., Castilho, Raphael C. & De Moraes, Gilberto J., 2020, Catalogue of the mite family Podocinidae Berlese (Acari: Mesostigmata), pp. 141-156 in Zootaxa 4802 (1) on page 153, DOI: 10.11646/zootaxa.4802.1.9, http://zenodo.org/record/3904968
description: {"references": ["Yan, Y., Jin, D. - C., Wu, D., Guo, J. - J. & Guo, X. - G. (2012) A revised checklist and key to the genus Podocinum Berlese (Acari: Podocinidae) with description of a new species from Tibet, Southwest China. Zootaxa, 3194 (1), 35 - 48. https: // doi. org / 10.11646 / zootaxa. 3194.1.2"]}
Harnessing the Quantum Behavior of Spins on Surfaces
Creators: name: Chen, Yi
name: Bae, Yujeong
name: Heinrich, Andreas J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Applied Physics (physics.app-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The desire to control and measure individual quantum systems such as atoms and ions in a vacuum has led to significant scientific and engineering developments in the past decades that form the basis of today's quantum information science. Single atoms and molecules on surfaces, on the other hand, are heavily investigated by physicists, chemists, and material scientists in search of novel electronic and magnetic functionalities. These two paths crossed in 2015 when it was first clearly demonstrated that individual spins on a surface can be coherently controlled and read out in an all-electrical fashion. The enabling technique is a combination of scanning tunneling microscopy (STM) and electron spin resonance (ESR), which offers unprecedented coherent controllability at the Angstrom length scale. This review aims to illustrate the essential ingredients that allow the quantum operations of single spins on surfaces. Three domains of applications of surface spins, namely quantum sensing, quantum control, and quantum simulation, are discussed with physical principles explained and examples presented. Enabled by the atomically-precise fabrication capability of STM, single spins on surfaces might one day lead to the realization of quantum nanodevices and artificial quantum materials at the atomic scale.
description: Advanced Materials, in press
The synchrotron boiler and the spectral states of black hole binaries
Creators: name: Malzac, Julien
name: Belmont, Renaud
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study the effects of synchrotron self-absorption on the Comptonising electron distribution in the magnetised corona of accreting black holes. We solve the kinetic equations assuming that power is supplied to the coronal electrons through Coulomb collisions with a population of hot protons and/or through the injection of non-thermal energetic electrons by some unspecified acceleration process. We compute numerically the steady state particle distributions and escaping photon spectra. These numerical simulations confirm that synchrotron self-absorption, together with e-e Coulomb collisions, constitute an efficient thermalising mechanism for the coronal electrons. When compared to the data, they allow us to constrain the magnetic field and temperature of the hot protons in the corona independently of any dynamical accretion flow model or geometry. A preliminary comparison with the Low Hard State (LHS) spectrum of Cygnus X-1 indicates a magnetic field below equipartition with radiation, suggesting that the corona is not powered through magnetic field dissipation (as assumed in most accretion disc corona models). However, in the LHS of Cygnus X-1 and other sources, our results also point toward proton temperatures substantially lower than what predicted by the ADAF-like models. In contrast, in the High Soft State (HSS) both the proton temperature and magnetic field could be much higher. We also show that in both spectral states the magnetised corona could be powered essentially through acceleration of non-thermal particles. The main differences between the LHS and HSS coronal emission can then be understood as the consequence of the much stronger radiative cooling in the HSS caused by the soft thermal radiation coming from the geometrically thin accretion disc.
description: 23 pages, 11 figures, accepted for publication in MNRAS
Collective Uncertainty in Partially-Polarized and Partially-Decohered Spin-1/2 Systems
Creators: name: Baragiola, Ben Q.
name: Chase, Bradley A.
name: Geremia, JM
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: It has become common practice to model large spin ensembles as an effective pseudospin with total angular momentum J = N x j, where j is the spin per particle. Such approaches (at least implicitly) restrict the quantum state of the ensemble to the so-called symmetric Hilbert space. Here, we argue that symmetric states are not generally well-preserved under the type of decoherence typical of experiments involving large clouds of atoms or ions. In particular, symmetric states are rapidly degraded under models of decoherence that act identically but locally on the different members of the ensemble. Using an approach [Phys. Rev. A 78, 052101 (2008)] that is not limited to the symmetric Hilbert space, we explore potential pitfalls in the design and interpretation of experiments on spin-squeezing and collective atomic phenomena when the properties of the symmetric states are extended to systems where they do not apply.
description: 13 pages, 7 figures
The Nature of High-frequency Oscillations Associated with Short-lived Spicule-type Events
Creators: name: Shetye, Juie
name: Verwichte, Erwin
name: Stangalini, Marco
name: Doyle, J. G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: We investigate high resolution spectroscopic and imaging observations from the CRisp Imaging SpectroPolarimeter (CRISP) instrument to study the dynamics of chromospheric spicule type events. It is widely accepted that chromospheric fine structures are waveguides for several types of magnetohydrodynamic (MHD) oscillations, which can transport energy from the lower to upper layers of the Sun. We provide a statistical study of 30 high frequency waves associated with spicule type events. These high frequency oscillations have two components of transverse motions: the plane of sky (POS) motion and the line of sight (LOS) motion. We focus on single isolated spicules and track the POS using time distance analysis and in the LOS direction using Doppler information. We use moment analysis to find the relation between the two motions. The composition of these two motions suggests that the wave has a helical structure. The oscillations do not have phase differences between points along the structure. This may be the result of the oscillation being a standing mode, or that propagation is mostly in the perpendicular direction. There is evidence of fast magnetoacoustic wave fronts propagating across these structures. To conclude, we hypothesize that the compression and rarefaction of passing magnetoacoustic waves may influence the appearance of spicule type events, not only by contributing to moving them in and out of the wing of the spectral line but also through the creation of density enhancements and an increase in opacity in the Halpha line.
description: 24 pages, 18 Figures
Spreadsheet Auditing Software
Creators: name: Nixon, David
name: O'Hara, Mike
Publisher: name: arXiv
Year: 2010
Subjects: subject: Software Engineering (cs.SE)
subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: It is now widely accepted that errors in spreadsheets are both common and potentially dangerous. Further research has taken place to investigate how frequently these errors occur, what impact they have, how the risk of spreadsheet errors can be reduced by following spreadsheet design guidelines and methodologies, and how effective auditing of a spreadsheet is in the detection of these errors. However, little research exists to establish the usefulness of software tools in the auditing of spreadsheets. This paper documents and tests office software tools designed to assist in the audit of spreadsheets. The test was designed to identify the success of software tools in detecting different types of errors, to identify how the software tools assist the auditor and to determine the usefulness of the tools.
description: 14 Pages, 5 Figures. All the comparisons are now out of date however all the auditing software studied is still available for further historical and comparative analysis. Minor Edits and referencing of the original paper by GJC in Jan 2010. In memory of Mike O' Hara
Addendum: Precision in high resolution absorption line modelling, analytic Voigt derivatives, and optimisation methods
Creators: name: Lee, Chung-Chi
name: Webb, John K.
name: Carswell, Robert F.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Computational Physics (physics.comp-ph)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: The parent paper to this Addendum describes the optimisation theory on which VPFIT, a non-linear least-squares program for modelling absorption spectra, is based. In that paper, we show that Voigt function derivatives can be calculated analytically using Taylor series expansions and look-up tables, for the specific case of one column density parameter for each absorption component. However, in many situations, modelling requires more complex parameterisation, such as summed column densities over a whole absorption complex, or common pattern relative ion abundances. This Addendum provides those analytic derivatives.
description: 4 pages, 2 figures. Submitted to MNRAS 23 Dec 2021, accepted 24 Dec 2021
Single Particle Probes of d+Au Collisions in PHENIX
Creators: name: Citron, Zvi
Publisher: name: arXiv
Year: 2009
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Deuteron-gold collisions provide insights into the nuclear structure function and a valuable baseline for Au+Au collisions. Measurement of the nuclear modification factor, R_{dAu}, in d+Au in the PHENIX central arms for hadrons and photons allows us to disentangle cold nuclear matter effects from the hot medium effects that are important in Au+Au collisions. In addition, the d+Au system can yield important insights into the gluonic structure of the Au nucleus. RHIC experiments have previously measured suppression of forward rapidity particle production relative to p+p scaled by the number of binary N-N collisions, but a definitive explanation of these data is thus far elusive. Correlations between hadrons with a large rapidity gap are a particularly sensitive probe of gluon saturation. We will discuss probing this physics via particle production in events tagged with high momentum particles at different rapidities, along with R_{dAu} in new forward rapidity regions.
description: 4 pages, 5 figures - To appear in the conference proceedings for Quark Matter 2009, March 30 - April 4, Knoxville, Tennessee (final version)
Hyperentanglement of two photons in three degrees of freedom
Creators: name: Vallone, G.
name: Ceccarelli, R.
name: De Martini, F.
name: Mataloni, P.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A 6-qubit hyperentangled state has been realized by entangling two photons in three degrees of freedom. These correspond to the polarization, the longitudinal momentum and the indistinguishable emission produced by a 2-crystal system operating with Type I phase matching in the spontaneous parametric down conversion regime. The state has been characterized by a chained interferometric apparatus and its complete entangled nature has been tested by a novel witness criterium specifically introduced for hyperentangled states. The experiment represents the first realization of a genuine hyperentangled state with the maximum entanglement between the two particles allowed in the given Hilbert space.
description: 4 pages, 2 figures, Revtex4
A versatile multicomponent mesoporous silica nanosystem with dual antimicrobial and osteogenic effects
Creators: name: Alvarez, Elena
name: Estevez, Manuel
name: Jimenez-Jimenez, Carla
name: Colilla, Montserrat
name: Izquierdo-Barba, Isabel
name: Gonzalez, Blanca
name: Vallet-Regi, Maria
Publisher: name: arXiv
Year: 2021
Subjects: subject: Tissues and Organs (q-bio.TO)
subject: FOS: Biological sciences

description: In this manuscript, we propose a simple and versatile methodology to design nanosystems based on biocompatible and multicomponent mesoporous silica nanoparticles (MSNs) for infection management. This strategy relies on the combination of antibiotic molecules and antimicrobial metal ions into the same nanosystem, affording a significant improvement of the antibiofilm effect compared to that of nanosystems carrying only one of these agents. The multicomponent nanosystem is based on MSNs externally functionalized with a polyamine dendrimer (MSN-G3) that favors internalization inside the bacteria and allows the complexation of multiactive metal ions (MSN-G3-Mn+). Importantly, the selection of both the antibiotic and the cation may be done depending on clinical needs. Herein, levofloxacin and Zn2+ ion, chosen owing to both its antimicrobial and osteogenic capability, have been incorporated. This dual biological role of Zn2+ could have and adjuvant effect thought destroying the biofilm in combination with the antibiotic as well as aid to the repair and regeneration of lost bone tissue associated to osteolysis during infection process. The versatility of the nanosystem has been demonstrated incorporating Ag+ ions in a reference nanosystem. In vitro antimicrobial assays in planktonic and biofilm state show a high antimicrobial efficacy due to the combined action of levofloxacin and Zn2+, achieving an antimicrobial efficacy above 99% compared to the MSNs containing only one of the microbicide agents. In vitro cell cultures with MC3T3-E1 preosteoblasts reveal the osteogenic capability of the nanosystem, showing a positive effect on osteoblastic differentiation while preserving the cell viability.
description: 27 pages, 8 figures
IL PATRIMONIO NETTO BANCARIO
Creators: name: MANZONI, PAOLO
Publisher: name: Universit� degli Studi di Milano
Year: 2015

description: The aim of my dissertation is to investigate the function of the net worth - in particular capital and surplus - of the ordinary corporations and of the banks in order to demonstrate that the net worth fulfill a strategic role for creditors? protection increased in the banking sector by the regulatory capital requirements that have a direct and indirect impact on the banks? net worth and that function is not adversely impacted by the international accounting standards.
EFFECTS OF ATM KINASE INHIBITION ON BRAIN DEVELOPMENT
Creators: name: PIZZAMIGLIO, LARA
Publisher: name: Universit� degli Studi di Milano
Year: 2018

description: The maintenance of a proper balance between excitatory and inhibitory neurotransmission (E/I ratio) is crucial for correct brain development, function and plasticity. Through its inhibitory action, GABA (gamma-aminobutyric acid) neurotransmitter is the principal regulator of E/I ratio, exerting a precise modulation of excitatory transmission. Conversely, at the early stages of neuronal maturation, GABA operates as an excitatory neurotransmitter directly evoking action potentials. Then, during development, it acquires its typical role of brake for neuronal activity through the fundamental process called ?excitatory-to-inhibitory switch of GABA?, the postnatal transition of GABA transmission from excitatory to inhibitory, directly related to the action of the potassium-chloride co-transporter KCC2. Defects in GABA switch have been largely described in neurodevelopmental disorders such as epilepsy, autism and schizophrenia. In this context, we have recently unveiled a new role of ATM (Ataxia Telangiectasia Mutated), a protein kinase involved in DNA double strand breaks (DSB) repair, in orchestrating the maturation of GABAergic inhibition. Here we demonstrate that the exposure of wild-type neurons in a ?critical window? during development to an inhibitor of ATM kinase activity (KU), a drug already exploited as therapeutic tool in oncology, accelerates the excitatory-to-inhibitory switch of GABA. We show that the molecular mechanism underlying KU effect involves the transcription factor Egr4 and the epigenetic regulator MeCP2, which independently and in parallel boost KCC2 expression both in vitro and in vivo. The resultant neuronal network exhibits a potentiated inhibitory synaptic transmission and appears resistant to a hyper-excitability paradigm. Surprisingly, we found an increased expression of ATM associated to low levels of KCC2 in Mecp2y/- mice, the genetic model of Rett syndrome (RTT), a neurodevelopmental disorder associated to mental retardation. Coherently, KU treatment in Mecp2y/- neurons, potentiating Egr4 activity on Kcc2b promoter and restoring proper KCC2 expression, rescues the delayed GABA switch and counteracts the pharmacologically-induced hyper-excitability, suggesting that increased ATM levels contribute to the generation of the altered neuronal phenotype in RTT. The results collected in this thesis provide new evidence and molecular mechanisms of ATM crucial role in the physiological development of central neurons and highlight ATM inhibition as a prospective therapeutic tool in neurodevelopmental disorders.
ROLE OF IRSP53 IN EPITHELIAL POLARITY ESTABLISHMENT AND LUMEN MORPHOGENESIS
Creators: name: SYED, ABRAR HUSSAIN RIZVI
Publisher: name: Universit� degli Studi di Milano
Year: 2019

description: Polarity establishment is essential for the normal development and morphogenesis of virtually all epithelial tissues. Loss of epithelial polarity has been implicated in many disorders including tumorigenesis and metastasis. Epithelial polarity is established by a multifaceted signalling cross-talk between a network of polarity determinants that include cell adhesion molecules, trafficking machinery, polarity complexes and the spindle orientation apparatus. Despite tremendous advance in defining the molecular details of how these processes are controlled, much remains to be understood as to how the coordination between all these components is achieved. IRSp53, a versatile molecule operating at the membrane-actin interface, has been reported to be involved in the process of epithelial polarity but the mechanisms through which it operates has, however, remained completely elusive. Here, we studied the processes through which IRSp53 plays a role in the establishment of epithelial polarity and lumen morphogenesis in MDCK and Caco-2 derived 3-D cysts. We further extended the relevance of our in vitro findings to the kidney morphogenesis in our genetically modified animal models. We found that IRSP53 is apically restricted at the luminal side of various epithelial tubular and glandular human, murine and zebrafish tissues. Further, IRSp53 is early recruited after the first cell division along the AMIS and essential for the formation of a single apical domain and the localized recruitment of aPKC and Podocalyxin (PDX). Molecularly, IRSp53 exerts this function by binding directly through a positively charged patch on its I-BAR-domain to the inactive form of RAB35, which co-localizes with IRSp53 at the onset of AMIS, and by controlling PDX trafficking. Additionally, membrane- and SH3- mediated interactions are required for proper localization and, thus, for the function of IRSp53. IRSp53 is also found to localize to the spindle poles and to aid in the proper orientation of the mitotic spindle during cystogenesis. Consistently, IRSp53 depletion causes spindle misorientation, leading to aberrant cell divisions and multi-lumen phenotype during epithelial cystogenesis. The critical physiological role of IRSp53 in epithelial morphogenesis is corroborated by the finding that genetic deletion of IRSp53 results in abnormal renal tubulogenesis, with profound defects in tubular polarity, architectural organization and lumen formation during both kidney development and in the adult kidneys either in IRSp53 zebrafish mutant lines and in IRSp53 KO murine models. We propose that the proper localisation of IRSp53 is pivotal for the assembly of macromolecular complexes on the apical domain of tubular and glandular epithelia which is, in turn, necessary for the proper kidney development by regulating cell polarity and lumen morphogenesis.
Exact expressions for the number of levels in single-\textit{j} orbits for three, four and five fermions
Creators: name: Poirier, Michel
name: Pain, Jean-Christophe
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We propose closed-form expressions of the distributions of magnetic quantum number $M$ and total angular momentum $J$ for three and four fermions in single-$j$ orbits. The latter formulas consist of polynomials with coefficients satisfying congruence properties. Such results, derived using doubly-recursive relations over $j$ and the number of fermions, enable us to deduce explicit expressions for the total number of levels in the case of three-, four- and five-fermion systems. We present applications of these formulas, such as sum rules for six-$j$ and nine-$j$ symbols, obtained from the connection with fractional-parentage coefficients, an alternative proof of the Ginocchio-Haxton relation or cancellation properties of the number of levels with a given angular momentum.
description: 22 pages, 4 figures
OXIDATIVE STRESS RESPONSE OF MODEL BIOFILM SYSTEMS UNDER DIFFERENT ENVIRONMENTAL CUES
Creators: name: GAMBINO, MICHELA
Publisher: name: Universit� degli Studi di Milano
Year: 2015

description: During my PhD, I focused on three important environmental bacteria, namely, Azotobacter vinelandii, Bacillus subtilis and Burkholderia thailandensis. In each model, I studied different mechanisms of oxidative stress, related to their role in the environment or, in the case of B. thailandensis, related to its condition of opportunistic pathogen of invertebrates and model for the human pathogen B. pseudomallei. In A. vinelandii, inactivation of the rhodanese?like protein RhdA resulted in continuous generation of endogenous oxidative stress, promoting biofilm genesis, stimulating the activity of scavenging systems and triggering a switch between swarming and biofilmlike phenotypes. Furthermore, the oxidative stress affected the composition of the exopolymeric substances (EPS), resulting in the production of a polysaccharide?rich extracellular polymeric matrix in mutant (part II, chapter 1). In B. subtilis, the antimicrobial mechanism of silver nanoparticles (Ag?NPs) involve the production of reactive oxygen species (ROS), with possible consequences on soil bacteria. Sub?lethal doses of Ag?NPs increased the ROS formation in B. subtilis planktonic cells, but not in sessile cells, suggesting the presence of scavenging systems in biofilms. Consistently, proteomic analysis in Ag?NPs?treated biofilms showed increased production of proteins related to redox , quorum sensing and to stress response, thus suggesting a coordinated regulation of biofilm and stress response genes. Extracellular polysaccharide production and inorganic phosphate solubilization were also increased, possibly as part of a coordinated response to oxidative stress (part II, chapter 2). Finally we challenged B. thailandensis with phenazine methosulphate (PMS) to simulate the oxidative stress encountered in the soil and in the infected host. A new molecular approach to create mutants in Burkholderia spp. has been developed as part of this work (part II, chapter 3). In B. thailandensis biofilm, oxidative stress decreased as the biofilm reached the mature phase. The presence of PMS affected the biofilm morphology, triggering the production of more EPS. Interestingly , the deletion of the periplasmic superoxide dismutase, sodC, triggered polysaccharide production in biofilm cells (part III, chapter 1). My results demonstrate how the matrix production plays a pivotal role in protection from oxidative injuries in bacterial biofilm, both in Gram?negative and Gram?positive bacteria. The protection mechanisms activated by biofilm in response to oxidative stress can have important consequences on environmental biodiversity and in the balance between planktonic and biofilm cells.