cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The Abundance of Distant and Extremely Red Galaxies: The Role of AGN Feedback in Hierarchical Models
Creators: name: Menci, N.
name: Fontana, A.
name: Giallongo, E.
name: Grazian, A.
name: Salimbeni, S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We investigate the effect of AGN feedback associated to the bright QSO phase onto the color distribution of galaxies from z=0 up to z=4. To this aim, we insert a blast-wave model of AGN feedback in our semi-analytic model of galaxy formation, which includes the growth of supermassive black holes and the AGN activity triggered by interactions of the host galaxies. The AGN feedback is directly related to the impulsive, luminous quasar phase. We test our model by checking the consistency of its results against i) the QSO luminosity functions from z=0 to z=4; ii) the observed local relation between the black hole mass m_{BH} and the mass of the host galaxy. At low redshift the inclusion of AGN feedback enhances the number of red bright galaxies, so that the color distribution of M_r1.5) galaxies; at 0.5< z< 2 it yields rest-frame U-V color distribution in agreement with existing observations. In the range z=1.5-2.5, we find that 31% of galaxies contribute to the EROs population with m_K<20 (Vega system); at such a magnitude, the model yields an EROs surface density of 6.3 10^3 /deg^2 matching existing data; about 80 % of the above density is contributed by passive galaxies with old stellar populations. Extending our analysis to z=4, the model matches the observed surface density 1.5 10^3 /deg^2 of DRGs at m_K=20; such a population is predicted to be dominated by galaxies with old stellar populations for z>2.5.
description: Accepted for publication in The Astrophysical Journal
Chiral phase structure and critical end point in QCD
Creators: name: Gao, Fei
name: Pawlowski, Jan M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We map out the QCD phase structure at finite temperature and chemical potential for 2-flavour and 2 + 1-flavour QCD. This is done within a generalised functional approach to QCD put forward in arXiv:2002.07500 [hep-ph]. Specifically we compute the quark propagator and the finite-temperature and density fluctuations of the gluon propagator and the quark-gluon vertex on the basis of precision data for vacuum correlation functions. The novel ingredient is the direct self-consistent computation of the DSEs for the dressings of the quark-gluon vertex, in contrast to the common use of STI-inspired vertices. For small densities the results for the chiral order parameter agree with the respective lattice and functional renormalisation group results, for large densities the present results are in a quantitative agreement with the latter, including the location of the critical end point.
description: 8 pages, 5 figures
Optimal transport in full-waveform inversion: Analysis and practice of the multidimensional Kantorovich-Rubinstein norm
Creators: name: Messud, Jérémie
name: Poncet, Raphaël
name: Lambaré, Gilles
Publisher: name: arXiv
Year: 2021
Subjects: subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: In the last ten years, full-waveform inversion has emerged as a robust and efficient high-resolution velocity model-building tool for seismic imaging, with the unique ability to recover complex subsurface structures. Originally based on a data fitting process using a least-squares cost function, it suffered from high sensitivity to cycle-skipping and was therefore of poor efficiency in handling large time shifts between observed and modelled seismic events. To tackle this problem, a common practice is to start the inversion using the low temporal frequencies of the data and selecting diving wave events. Complementary to this, the use of other cost functions has been investigated. Among these, cost functions based on optimal transport appeared appealing to possibly handle large time shifts between seismic events. Several strategies inspired by optimal transport have been proposed, taking into account the specificities of seismic data. Among them, the approach based on the Kantorovich-Rubinstein norm offers the possibility of the direct use of seismic data and an efficient numerical implementation allowing for a multidimensional (data coordinate space) application. We present here an analysis of the Kantorovich-Rubinstein norm, discussing its theoretical and practical aspects. A key component of our analysis is the back-propagated adjoint-source. We highlight its piecewise linearity, analyze its frequency content and amplitude balancing. We also emphasize the benefit of having a multidimensional implementation. Furthermore, we give practical rules for setting the tuning parameters of the numerical implementation. Our set of synthetic and field data examples demonstrate the improvements brought by the use of the Kantorovich-Rubinstein norm over least-squares full-waveform inversion, and highlight the improvements brought by the multidimensional approach over the one-dimensional one.
Radio and X-ray Observations of Short-lived Episodes of Electron Acceleration in a Solar Microflare
Creators: name: Sharma, Rohit
name: Battaglia, Marina
name: Luo, Yingjie
name: Chen, Bin
name: Yu, Sijie
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Solar flares are sudden energy release events in the solar corona, resulting from magnetic reconnection, that accelerates particles and heats the ambient plasma. During a flare, there are often multiple, temporally and spatially separated individual energy release episodes that can be difficult to resolve depending on the observing instrument. We present multi-wavelength imaging and spectroscopy observations of multiple electron acceleration episodes during a GOES B1.7-class two-ribbon flare on 2012 February 25, observed simultaneously with the Karl G. Jansky Very Large Array (VLA) at 1--2 GHz, the Reuven Ramatay High Energy Solar Spectroscopic Imager (RHESSI) in X-rays, and the Solar Dynamics Observatory in extreme ultraviolet (EUV). During the initial phase of the flare, five radio bursts were observed. A nonthermal X-ray source was seen co-temporal, but not co-spatial, with the first three radio bursts. Their radio spectra are interpreted as optically thick gyrosynchrotron emission. By fitting the radio spectra with a gyrosynchrotron model, we derive the magnetic field strength and nonthermal electron spectral parameters in each acceleration episode. Notably, the nonthermal parameters derived from X-rays differ considerably from the nonthermal parameters inferred from the radio. The observations are indicative of multiple, co-temporal acceleration episodes during the impulsive phase of a solar microflare. The X-ray and radio burst sources likely originate from separate electron distributions in different magnetic loops.
description: 16 pages, 12 figures
Some families of density matrices for which separability is easily tested
Creators: name: Braunstein, Samuel L.
name: Ghosh, Sibasish
name: Mansour, Toufik
name: Severini, Simone
name: Wilson, Richard C.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We reconsider density matrices of graphs as defined in [quant-ph/0406165]. The density matrix of a graph is the combinatorial laplacian of the graph normalized to have unit trace. We describe a simple combinatorial condition (the "degree condition") to test separability of density matrices of graphs. The condition is directly related to the PPT-criterion. We prove that the degree condition is necessary for separability and we conjecture that it is also sufficient. We prove special cases of the conjecture involving nearest point graphs and perfect matchings. We observe that the degree condition appears to have value beyond density matrices of graphs. In fact, we point out that circulant density matrices and other matrices constructed from groups always satisfy the condition and indeed are separable with respect to any split. The paper isolates a number of problems and delineates further generalizations.
description: 14 pages, 4 figures
A Coherent Timing Solution for the Nearby Isolated Neutron Star RX J1308.6+2127/RBS 1223
Creators: name: Kaplan, D. L.
name: van Kerkwijk, M. H.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a phase-connected timing solution for the nearby isolated neutron star RX J1308.6+2127 (RBS 1223). From dedicated Chandra observations as well as archival Chandra and XMM-Newton data spanning a period of five years, we demonstrate that the 10.31-sec pulsations are slowing down steadily at a rate of Pdot=1.120(3)e-13 s/s. Under the assumption that this is due to magnetic dipole torques, we infer a characteristic age of 1.5 Myr and a magnetic field strength of 3.4e13 G. As with RX J0720.4-3125, the only other radio-quiet thermally emitting isolated neutron star for which a timing solution has been derived, the field strength is consistent with what was inferred earlier from the presence of a strong absorption feature in its X-ray spectrum. Furthermore, both sources share that the characteristic age is in excess of the cooling age inferred from standard cooling models. The sources differ, however, in their timing noise: while RX J0720.4-3125 showed considerable timing noise, RX J1308.6+2127 appears relatively stable.
description: 5 pages, 2 figures. ApJL in press
A comparison of optimisation algorithms for high-dimensional particle and astrophysics applications
Creators: name: The DarkMachines High Dimensional Sampling Group
name: Balázs, Csaba
name: van Beekveld, Melissa
name: Caron, Sascha
name: Dillon, Barry M.
name: Farmer, Ben
name: Fowlie, Andrew
name: Garrido-Merchán, Eduardo C.
name: Handley, Will
name: Hendriks, Luc
name: Jóhannesson, Guðlaugur
name: Leinweber, Adam
name: Mamužić, Judita
name: Martinez, Gregory D.
name: Otten, Sydney
name: Scott, Pat
name: de Austri, Roberto Ruiz
name: Searle, Zachary
name: Stienen, Bob
name: Vanschoren, Joaquin
name: White, Martin
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Optimisation problems are ubiquitous in particle and astrophysics, and involve locating the optimum of a complicated function of many parameters that may be computationally expensive to evaluate. We describe a number of global optimisation algorithms that are not yet widely used in particle astrophysics, benchmark them against random sampling and existing techniques, and perform a detailed comparison of their performance on a range of test functions. These include four analytic test functions of varying dimensionality, and a realistic example derived from a recent global fit of weak-scale supersymmetry. Although the best algorithm to use depends on the function being investigated, we are able to present general conclusions about the relative merits of random sampling, Differential Evolution, Particle Swarm Optimisation, the Covariance Matrix Adaptation Evolution Strategy, Bayesian Optimisation, Grey Wolf Optimisation, and the PyGMO Artificial Bee Colony, Gaussian Particle Filter and Adaptive Memory Programming for Global Optimisation algorithms.
description: Experimental framework publicly available at http://www.github.com/darkmachines/high-dimensional-sampling
Organizzazione amministrativa e sovranità popolare. l’organizzazione pubblica come problema teorico, dogmatico e politico
Creators: name: Perfetti, Luca R.
Publisher: name: P.A. Persona e Amministrazione
Year: 2019

description: Sintesi Il saggio muove dal tratto comune delle configurazioni teoriche classiche dell’organizzazione amministrativa, come struttura funzionale a fini pubblici. All’interno di queste teorie tradizionali, quindi, vengono isolati gli elementi delle teorie oggettive e soggettive dell’organizzazione e discussi nei loro profili essenziali. Alla luce di questa discussione, viene proposto uno schema rinnovato di spiegazione dell’organizzazione pubblica come funzione della sovranità popolare, lungo la tripartizione che distingue (i) organizzazione pubblica direttamente posta in essere dalla società, (ii) organizzazione pubblica come funzione diretta della società ed (iii) organizzazione pubblica come funzione della società mediata dalla rappresentanza politica. Abstract The paper begins by analyzing the traditional theories on administrative organization. The common element is to be identify in the objective of the organization to the purpose of public interest. Nonetheless, State’s sovereignty is traditionally considered the source of public interest, therefore traditional theories shall be reconsidered in the light of popular sovereignty, as provided in the Constitution. In such a perspective, a revised administrative organization theory is proposed: administrative organization is a function of the society, therefore administrative organizations are structured in three different ways: (i) as organizations directly implemented by the society in the public interest; (ii) as public organizations as function of popular sovereignty directly; (iii) as public organizations as function of popular sovereignty intermediated by democratic representation of the people expression of the political guidance. Parole chiave: pubblica amministrazione – fini pubblici – sovranità popolare – organizzazione amministrativa Keywords: public administration – public interest – popular sovereignty – administrative organization
description: P.A. Persona e Amministrazione, N. 1 (2019)
Detecting Autism Spectrum Disorder using Machine Learning
Creators: name: Hossain, Md Delowar
name: Kabir, Muhammad Ashad
name: Anwar, Adnan
name: Islam, Md Zahidul
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: Autism Spectrum Disorder (ASD), which is a neuro development disorder, is often accompanied by sensory issues such an over sensitivity or under sensitivity to sounds and smells or touch. Although its main cause is genetics in nature, early detection and treatment can help to improve the conditions. In recent years, machine learning based intelligent diagnosis has been evolved to complement the traditional clinical methods which can be time consuming and expensive. The focus of this paper is to find out the most significant traits and automate the diagnosis process using available classification techniques for improved diagnosis purpose. We have analyzed ASD datasets of Toddler, Child, Adolescent and Adult. We determine the best performing classifier for these binary datasets using the evaluation metrics recall, precision, F-measures and classification errors. Our finding shows that Sequential minimal optimization (SMO) based Support Vector Machines (SVM) classifier outperforms all other benchmark machine learning algorithms in terms of accuracy during the detection of ASD cases and produces less classification errors compared to other algorithms. Also, we find that Relief Attributes algorithm is the best to identify the most significant attributes in ASD datasets.
Politiche di coesione, strutture amministrative e Mezzogiorno
Creators: name: Amorosino, Sandro
Publisher: name: P.A. Persona e Amministrazione
Year: 2019

description: Le regioni meridionali presentano un forte divario economico, sociale ed amministrativo rispetto a quelle del centro nord. La politica di coesione per ridurre il divario è poco efficace da molti anni. Le cause principali sono l’assenza di scelte politiche incisive e le disfunzioni (malfunzionamento) delle amministrazioni dello Stato e delle Regioni nell’attuare i programmi approvati. La possibile attribuzione di maggiori poteri, anche alle Regioni meridionali, in attuazione dell’articolo 116 della Costituzione, sarebbe poco efficace se prima non verranno riorganizzate le pubbliche amministrazioni centrali e regionali. The southern regions have a strong economic, social and administrative gap compared to those in the central-north. Cohesion policy to reduce the gap has been ineffective for many years. The main causes are the absence of incisive political choices and the malfunctioning of the administrations of the State and the Regions in the carry out approved programs. The possible attribution of greater powers, also to the Southern Regions, in implementation of Article 116 of the Constitution, would be ineffective if the central and regional public administrations are not reorganized. PAROLE CHIAVE: Voto di protesta (nel Sud Italia), Divario (tra Nord e Sud Italia), Politiche di coesione, Disfunzioni delle amministrazioni meridionali, Regionalismo differenziato. KEYWORDS: Protest rating (in Southern Italy), Gap (between North and South Italy), Cohesion policies, Dysfunctions of southern administrations, Differentiated regionalism.
description: P.A. Persona e Amministrazione, N. 1 (2019)
L’organizzazione dei soggetti privati incaricati di pubbliche funzioni e i riflessi sul regime degli atti
Creators: name: Piazza, Ippolito
Publisher: name: P.A. Persona e Amministrazione
Year: 2019

description: Il contributo intende mostrare come l’organizzazione dei soggetti privati assuma un rilievo nel caso in cui questi svolgano una funzione pubblica. In particolare, ci si sofferma su due esempi di conformazione dell’organizzazione privata: l’uno, realizzato attraverso una penetrante disciplina legislativa (il caso delle SOA); l’altro, messo in atto mediante l’imposizione di uno standard di garanzia nello svolgimento dell’attività (il caso del responsabile del procedimento). L’analisi delle due fattispecie consente di evidenziare i profili di possibile assimilazione dell’organizzazione privata con quella pubblica, laddove il privato svolga un’attività amministrativa e laddove le esigenze di garanzia dei cittadini lo richiedano, ma si mettono in luce anche le ineliminabili differenze. Infine, si esaminano le ricadute che il rilievo dell’organizzazione produce sul regime dei vizi degli atti ‘amministrativi’ emanati dai soggetti privati e si suggeriscono ipotesi nelle quali, a dispetto di un’opinione molto diffusa, è rilevabile anche il vizio di incompetenza. The paper aims to show how the organisation of private entities may be juridically relevant when they fulfill a public task. First, it analyses two examples of legislative constraints on private organisation. Then, it enquires wheter and to what extent private organisation may be compared to public one. Finally, it deals with the conseuqences of such organisational relevance on the vices of private actors’ administrative acts. PAROLE CHIAVE: organizzazione, garanzie, esternalizzazioni, privatizzazione, incompetenza. KEYWORDS: organization, guarantees, contracting out, privatization, lack of competence.
description: P.A. Persona e Amministrazione, N. 1 (2019)
Integral Field Spectroscopy of Blue Compact Dwarf Galaxies
Creators: name: Garcia-Lorenzo, Begona
name: Cairos, Luz M.
name: Caon, Nicola
name: Monreal-Ibero, Ana
name: Kehrig, Carolina
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present results on integral-field optical spectroscopy of five luminous Blue Compact Dwarf galaxies. The data were obtained using the fiber system INTEGRAL attached at the William Herschel telescope. The galaxies Mrk 370, Mrk 35, Mrk 297, Mrk 314 and III Zw 102 were observed. The central 33"x29" regions of the galaxies were mapped with a spatial resolution of 2"/spaxel, except for Mrk 314, in which we observed the central 16"x12" region with a resolution of 0.9"/spaxel$. We use high-resolution optical images to isolate the star-forming knots in the objects; line ratios, electron densities and oxygen abundances in each of these regions are computed. We build continuum and emission-line intensity maps as well as maps of the most relevant line ratios: [OIII]5007\Hb, [NII]6584\Ha, and Ha\Hb, which allow us to obtain spatial information on the ionization structure and mechanisms. We also derive the gas velocity field from the Ha and [OIII]5007 emission lines. We find that all the five galaxies are in the high end of the metallicity range of Blue Compact Dwarf galaxies, with oxygen abundances varying from Z\sun~0.3 to Z\sun~1.5. The objects show HII-like ionization in the whole field of view, except the outer regions of IIIZw102 whose large [NII]6584/Ha values suggest the presence of shocks. The five galaxies display inhomogeneous extinction patterns, and three of them have high Ha/Hb ratios, indicative of a large dust content; all galaxies display complex, irregular velocity fields in their inner regions.
description: 26 pages, 14 figures, 5 tables. Accepted for publication in the ApJ
Introducing pre-impact air-cushioning effects into the Wagner model of impact theory
Creators: name: Moore, Matthew R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: In this analysis, we consider the effects of non-quiescent initial conditions driven by pre-impact air-water interactions on the classical Wagner model of impact theory. We consider the problem of a rigid, solid impactor moving vertically towards a liquid pool. Prior to impact, viscous forces in the air act to deform the liquid free surface, inducing a flow in the pool. These interactions are then incorporated as initial conditions in the post-impact analysis. We derive expressions for the size of the effective contact set, the leading-order pressure and force on the impactor, and the speed and thickness of the jet at its base. In all cases, we show that the effect of the pre-impact behaviour is to cushion the impactor, reducing the size of the effective contact set and, hence, the force on the impactor. Small- and large-time asymptotic solutions are derived for general power-law impactors, and we show that the effects of the air die away as the impact progresses, so that we approach the classical Wagner solution.
Low Temperature Opacities
Creators: name: Ferguson, Jason W.
name: Alexander, David R.
name: Allard, France
name: Barman, Travis
name: Bodnarik, Julia G.
name: Hauschildt, Peter H.
name: Heffner-Wong, Amanda
name: Tamanai, Akemi
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Previous computations of low temperature Rosseland and Planck mean opacities from Alexander & Ferguson (1994) are updated and expanded. The new computations include a more complete equation of state with more grain species and updated optical constants. Grains are now explicitly included in thermal equilibrium in the equation of state calculation, which allows for a much wider range of grain compositions to be accurately included than was previously the case. The inclusion of high temperature condensates such as Al$_2$O$_3$ and CaTiO$_3$ significantly affects the total opacity over a narrow range of temperatures before the appearance of the first silicate grains. The new opacity tables are tabulated for temperatures ranging from 30000 K to 500 K with gas densities from 10$^{-4}$ g cm$^{-3}$ to 10$^{-19}$ g cm$^{-3}$. Comparisons with previous Rosseland mean opacity calculations are discussed. At high temperatures, the agreement with OPAL and Opacity Project is quite good. Comparisons at lower temperatures are more divergent as a result of differences in molecular and grain physics included in different calculations. The computation of Planck mean opacities performed with the opacity sampling method are shown to require a very large number of opacity sampling wavelength points; previously published results obtained with fewer wavelength points are shown to be significantly in error. Methods for requesting or obtaining the new tables are provided.
description: 39 pages with 12 figures. To be published in ApJ, April 2005
Metal abundances of RR Lyrae stars in the metal rich globular cluster NGC 6441
Creators: name: Clementini, G.
name: Gratton, R. G.
name: Bragaglia, A.
name: Ripepi, V.
name: Fiorenzano, A. F. Martinez
name: Held, E. V.
name: Carretta, E.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Low resolution spectra have been used to measure individual metal abundances of RR Lyrae stars in NGC 6441, a Galactic globular cluster known to have very unusual horizontal branch morphology and periods of the RR Lyrae stars for its high metallicity. We find an average metal abundance of [Fe/H]=-0.69 +/- 0.06 (r.m.s.=0.33 dex) and [Fe/H]=-0.41 +/- 0.06 (r.m.s.=0.36 dex) on Zinn & West and Carretta & Gratton metallicity scales, respectively, consistent with the cluster metal abundance derived by Armandroff & Zinn. Most of the metallicities were extrapolated from calibration relations defined for [Fe/H] < -1; however, they are clearly high and contrast with the rather long periods of the NGC 6441 variables, thus confirming that the cluster does not fit in the general Oosterhoff classification scheme. The r.m.s. scatter of the average is larger than observational errors (0.15-0.16 dex) possibly indicating some spread in metallicity. However, even the metal poor variables, if confirmed to be cluster members, are still more metal rich than those commonly found in the Oosterhoff type II globular clusters.
description: Accepted for publication on ApJ Letters
Coherent single-spin electron resonance spectroscopy manifested at an exceptional-point singularity in a doped polyacetylene
Creators: name: Dunham, Yujin
name: Kanki, Kazuki
name: Garmon, Savannah
name: Ordonez, Gonzalo
name: Tanaka, Satoshi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: Chemical Physics (physics.chem-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Spin-dependent charge transfer decay in an alkali atom doped polyacetylene is studied in terms of the complex spectral analysis, revealing the single-spin Zeeman splitting influenced by the spin-orbit interaction. Nonhermitian effective Hamiltonian has been derived from the total system hermitian Hamiltonian using Brillouin-Wigner-Feshbach projection method, where the microscopic spin-dependent dissipation effect is correctly incorporated in the energy-dependent self-energy. Since the present method maintains the dynamical and chiral symmetries of the total system, we discovered two types of exceptional point (EP) singularities in a unified perspective: the EP surface and EP ring are attributed to the dynamical and chiral symmetry breaking, respectively. We have revealed that the coherent single-spin electron resonance (SSESR) spectrum reflects the complex eigenenergy spectrum of the system. We have formulated the SSESR spectrum in terms of the nonlinear response function in the Liouville-space pathway approach, where we have constructed the Liouville space basis using the complex eigenstates of the total Hamiltonian. We have calculated the one- and two-dimensional Fourier transform SSESR (1DFT and 2DFT) spectra reflecting the spin-relaxation dynamics at the donor site. While the 1DFT SSESR spectrum reflects the complex eigenenergy spectrum, the 2DFT gives detailed information on the quantum coherence in the spin-relaxation dynamics as a cross-correlation between the two frequencies. We found a giant response of the coherent SSESR around the EP ring singularity due to the vanishing normalization factors at the EP ring and the resonance effect. We have discovered that the giant response is much larger in magnitudes in the 2DFT spectrum than in the 1DFT spectrum, which promises the 2DFT SSESR a useful tool to observe the single-spin response in a molecule.
description: 17 pages, 11 figures
Tunnel current in self-assembled monolayers of 3-mercaptopropyltrimethoxysilane
Creators: name: Aswal, Dinesh K.
name: Lenfant, Stéphane
name: Guerin, David
name: Yakhmi, Jatinder V.
name: Vuillaume, Dominique
Publisher: name: arXiv
Year: 2005
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The current density-voltage (J-V) characteristics of self assembled monolayers of 3-mercaptopropyltrimethoxysilane (MPTMS) chemisorbed on the native oxide surface of p+-doped Si demonstrate the excellent tunnel dielectric behavior of organic monolayers down to 3 carbon atoms. The J-V characteristics of MPTMS SAMs on Si are found to be asymmetric, and the direction of rectification has been found to depend upon the applied voltage range. At voltages < 2.45V, the reverse bias current was found to be higher than forward bias current; while at higher voltages this trend was reversed. This result is in agreement with Simmons theory. The tunnel barrier heights for this short chain (2.56 and 2.14 eV respectively at Au and Si interfaces) are in good agreement with the ones for longer chains (>10 carbon atoms) if the chain is chemisorbed at the electrodes. These results extend all previous experiments on such molecular tunnel dielectrics down to 3 carbon atoms. This suggests that these molecular monolayers, having good tunnel behavior (up to 2.5 eV) over a large bias range, can be used as gate dielectric well below the limits of Si-based dielectrics.
description: Small, in press
What can we learn from doing research with children as active agents?
Creators: name: Schwartz, Mila
Publisher: name: Zenodo
Year: 2021

description: Collecting data with and about young children: ethical and methodological issues 4th March 2021 3.00-4.50pm CET This Webinar is organized by the Multilingual Childhoods / REYLL research network Committee (Responsible: Dr. Fatma Said, Assistant Professor in Applied Linguistics at Zayed University, UAE). In our third online webinar we invite esteemed researchers and scholars who focus on researching young children’s language learning and their reflections on their learning process. Although, there is much research on children rarely is there an opportunity for students, early career scholars and researchers to meet and discuss tried and tested approaches to the topic, as well as possible future approaches. Much information in books does not allow for questions to be posed or for researchers to share actual experiences in an easy-to-access manner. Importantly, the invited speakers also cover issues of ethics and methodologies, which usually pose a challenge to researchers and having access to such a discussion is usually difficult. Hence, this unique webinar will create a space of discussion and learning by asking two central questions: “What can we learn from doing research with children as active agents?” and “What are ethical issues in studying children’s beliefs and reflections on their learning process?”
Protein-DNA interactions and chromosome condensation
Creators: name: Sauve, Debra Marie
Publisher: name: University of British Columbia
Year: 2009

description: The study of protein-DNA interactions has become a major focus of biochemical research since the realization that they are at the heart of such basic cellular processes as transcription, replication, recombination, and chromosome condensation. In vitro, many different techniques are available to study several aspects of protein-DNA interactions, however, their often transient nature can impede adequate analyses. In vivo, the 2 m of DNA that must be densely packed into a nucleus 5 μm in diameter, requires a complex system of interactions between proteins and DNA that are much more challenging to study. Ultraviolet laser crosslinking of proteins to DNA is a potentially powerful tool for studying their interactions in vitro and in vivo. Described in this thesis are procedures to detect and isolate covalently crosslinked protein-DNA complexes, both in vitro and in vivo. Analysis of crosslinked protein-DNA complexes by SDS-PAGE furnishes the approximate molecular weight of the crosslinked protein. Analysis of the DNA sequence bound to protein was not possible, as the DNA was determined to be excessively damaged, and thus unable to be replicated by transformation into E. coli, or amplified by the polymerase chain reaction. To highlight one of its many practical applications, in vivo UV laser crosslinking was used together with in situ approaches, to demonstrate that the histone H3 aminoterminal tail is bound to DNA during interphase, but upon histone H3 phosphorylation and chromosome condensation at mitosis, the tail becomes unbound. This is supported by in situ studies, which showed that the histone H3 tail is more accessible to antibodies during mitosis than at interphase. These observations correlate well with the mitotic phosphorylation of histone H3. In addition, polyamines were shown to associate with mitotic chromosomes to a greater extent than with decondensed chromatin. The evidence presented here suggests a new model for the role of the H3 tail at chromosome condensation. During interphase, the H3 tail is unphosphorylated and bound to DNA , and the chromatin is decondensed. At mitosis, the H3 tail becomes phosphorylated and is released from DNA, chromosomes condense, and polyamines become heavily associated with mitotic chromosomes, perhaps aiding in their packaging.
Semantic elicitation: "Think" and epistemic indefinites
Creators: name: Kipkoech, Linus
name: Bossi, Madeline
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: sgc

description: One .mp4 file and one .pdf file. Elicitation of different forms of think with various readings (i.e. de re vs. de dicto). Elicitation of scopal possibilities of epistemic indefinites with negation.
Ricusazione del responsabile del procedimento per conflitto di interessi tra dimensione organizzativa e pretese dei privati
Creators: name: Paolantonio, Nino
Publisher: name: P.A. Persona e Amministrazione
Year: 2019

description: Il lavoro analizza il ruolo del responsabile del procedimento sia nella dimensione “collaborativa” e di raccordo all’interno del procedimento amministrativo, sia con riferimento ai problemi generati dalla disciplina sul conflitto di interessi. Obiettivo dello scritto è dimostrare che il conflitto di interessi può rendersi visibile soltanto assicurando un efficace contraddittorio ed un altrettanto solido sistema di ricusazione. The paper analyzes the role of the responsible of the procedure both in the “collaborative” dimension and in the connection within the administrative procedure, and with reference to the problems generated by the discipline on conflict of interests. The aim of the paper is to demonstrate that the conflict of interests can become visible only by ensuring an effective contradictory and an equally solid recusal system. PAROLE CHIAVE: responsabile del procedimento, conflitto di interessi, collaborazione, con- traddittorio, ricusazione. KEYWORDS: responsible for the procedure, conflict of interest, collaboration, contradictory, recusal.
description: P.A. Persona e Amministrazione, N. 1 (2019)
A search for radio jets from massive young stellar objects. Association of radio jets with H2O and CH3OH masers
Creators: name: Kavak, U.
name: Sanchez-Monge, A.
name: Lopez-Sepulcre, A.
name: Cesaroni, R.
name: van der Tak, F. F. S.
name: Moscadelli, L.
name: Beltran, M. T.
name: Schilke, P.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Recent theoretical and observational studies debate the similarities between the formation process of high-mass (>8 Msun) and low-mass stars. The formation of low-mass star formation is directly associated with the presence of disks and jets. According to this scenario, radio jets are expected to be common in high-mass star-forming regions. We aim to increase the number of known radio jets in high-mass star forming regions by searching for radio jet candidates at radio continuum wavelengths. We have used the Karl G. Jansky Very Large Array (VLA) to observe 18 high-mass star-forming regions in the C band (6 cm, ~1.0 arcsec resolution) and K band (1.3 cm, ~0.3 arcsec resolution). We have searched for radio jet candidates by studying the association of radio continuum sources with shock activity signposts. We have identified 7 as the most probable radio jets. The radio luminosity of the radio jet candidates is correlated with the bolometric luminosity and the outflow momentum rate. About 7-36% of the radio jet candidates are associated with non-thermal emission. The radio jet candidates associated with 6.7 GHz CH3OH maser emission are preferentially thermal winds and jets, while a considerable fraction of radio jet candidates associated with H2O masers show non-thermal emission, likely due to strong shocks. Our sample of 18 regions is divided in 8 less evolved, infrared-dark regions and 10 more evolved, infrared-bright regions. We have found that ~71% of the identified radio jet candidates are located in the more evolved regions. Similarly, 25% of the less evolved regions harbor one of the most probable radio jets, while up to 50% of the more evolved regions contain one of these radio jet candidates. This suggests that the detection of radio jets in high-mass star forming regions is larger in slightly more evolved regions.
description: 40 pages, 165 figures, Accepted by A&A on November 27, 2020
Immedesimazione organica e criteri di imputazione della responsabilità
Creators: name: Cavallaro, Maria Cristina
Publisher: name: P.A. Persona e Amministrazione
Year: 2019

description: L’articolo esamina la teoria degli organi della pubblica amministrazione come criterio di imputazione della responsabilità. In particolare, attraverso lo studio della responsabilità in materia di servizi pubblici e nell’ambito dell’esercizio del potere, si cerca di verificare l’attualità della teoria organica alla luce dell’art. 28 della Costituzione. This paper examines the theory of bodies of the public administration and the principle of responsability. In particular, through the analysis of responsability for public services and liability within the exercise of administrative powers, the study focuses on the actuality of this theory and the application of art. 28 of the italian Constitution. PAROLE CHIAVE: organi, pubblica amministrazione, pubblico potere, responsabilità, art. 28 Cost. KEYWORDS: body of public administration, public power, responsability/liability, Article 28 Italian Constitution.
description: P.A. Persona e Amministrazione, N. 1 (2019)
Synoptic Overview on Application of Molecular Genetic Markers in Acacia
Creators: name: Habibi, Nazima
name: Rahman, Muhammed Hafizur
name: Al-Salameen, Fadila
Publisher: name: figshare
Year: 2021
Subjects: subject: Plant Biology
subject: FOS: Biological sciences

description: Drylands are one of the most vulnerable ecosystems on the earth. Agricultural production from these areas is minimal due to prevailing hostile environment, and most of the land remains underutilized. This fragile ecosystem is further weakened by periodic droughts and increasing overexploitation of the meager resources. The growth of woody leguminous species is full of promise in such areas due to their nutritional, economic, and ecological characteristics. Acacias are legumes that have aided in the recovery of marginal lands for agricultural development due to their ability to fix atmospheric nitrogen controlling soil erosion, providing refuge for other species, improving soil mineral composition and microbial biodiversity, in addition to being an important source of food in desert ecosystems. Sustainable use of these species are however, hampered by the continual deforestation, habitat fragmentation and progressive climate change.

Knowledge about the status and trends of species genetic diversity provides a basis for their conservation and maintenance. Owing to the technological advancement and their ever reducing costs, molecular markers provide ways to identify species or describe genetic variation of populations that can be used for gene conservation and restoration programs. In this communication, we review advances in the development and application of molecular markers in conservation, planning, landscaping and restoration of Acacia species with reference to drylands and discuss future prospects.
The Construction of the CMS Silicon Strip Tracker
Creators: name: Sguazzoni, Giacomo
Publisher: name: arXiv
Year: 2008
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: The CMS Silicon Strip tracker is a very large scale tracker entirely based on silicon strip detectors technology. The integration of modules, electronics, mechanics and services has been completed within the last eighteen months; first large standalone sub-structures (shells, disks, rods, petals depending on the tracker subdetector) have been integrated and verified; then they have been brought together into the final configuration. The CMS silicon tracker design and its construction is reviewed with particular emphasis on the procedures and quality checks deployed to successfully assembly several silicon strip modules and all ancillary components into these large sub-structures. An overview of the results and the lesson learned from the tracker integration are given, also in terms of failure and damage rates.
description: 2 pages, 5 figures, submitted to Hadron Collider Physics Symposium 2007 - La Biodola (Elba) May 2007
$R$-process enhancements of Gaia-Enceladus in GALAH DR3
Creators: name: Matsuno, Tadafumi
name: Hirai, Yutaka
name: Tarumi, Yuta
name: Hotokezaka, Kenta
name: Tanaka, Masaomi
name: Helmi, Amina
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The dominant site of production of $r$-process elements remains unclear despite recent observations of a neutron star merger. Observational constraints on the properties of the sites can be obtained by comparing $r$-process abundances in different environments. The recent Gaia data releases and large samples from high-resolution optical spectroscopic surveys are enabling us to compare $r$-process element abundances between stars formed in an accreted dwarf galaxy, Gaia-Enceladus, and those formed in the Milky Way. We aim to understand the origin of $r$-process elements in Gaia-Enceladus. We first construct a sample of stars to study Eu abundances without being affected by the detection limit. We then kinematically select 71 Gaia-Enceladus stars and 93 in-situ stars from the Galactic Archaeology with HERMES (GALAH) DR3, of which 50 and 75 stars can be used to study Eu reliably. Gaia-Enceladus stars clearly show higher ratios of [{Eu}/{Mg}] than in-situ stars. High [{Eu}/{Mg}] along with low [{Mg}/{Fe}] are also seen in relatively massive satellite galaxies such as the LMC, Fornax, and Sagittarius dwarfs. On the other hand, unlike these galaxies, Gaia-Enceladus does not show enhanced [{Ba}/{Eu}] or [{La}/{Eu}] ratios suggesting a lack of significant $s$-process contribution. From comparisons with simple chemical evolution models, we show that the high [{Eu}/{Mg}] of Gaia-Enceladus can naturally be explained by considering $r$-process enrichment by neutron-star mergers with delay time distribution that follows a similar power-law as type~Ia supernovae but with a shorter minimum delay time.
description: accepted to A\&A
The Application of European Competition Law in Arbitration Proceedings
Creators: name: Gospodinov, Penio Penev <1985>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2014
Subjects: IUS/15 Diritto processuale civile

description: This work provides several policy proposals capable to strengthen the private enforcement of EU competition law in arbitration. It focuses on the procedural law aspects that are permeated by legal uncertainty and that have not yet fallen under the scrutiny of the law and economics debate. The policy proposals described herein are based on the functional approach to law and economics and aim to promote a more qualified decision making process by: adjudicators, private parties and lawmakers. The resulting framework of procedural rules would be a cost-effective policy tool that could sustain the European Commission’s effort to guarantee a workable level of competition in the EU internal market. This project aims to answer the following broad research question: which procedural rules can improve the efficiency of antitrust arbitration by decreasing litigation costs for private parties on the one hand, and by increasing private parties’ compliance with competition law on the other hand?Throughout this research project, such broad question has been developed into research sub-questions revolving around several key legal issues. The chosen sub-research questions result from a vacuum in the European enforcement system that leaves several key legal issues in antitrust arbitration unresolved. The legal framework proposed in this research project could prevent such a blurry scenario from impairing the EU private enforcement of competition law in arbitration. Therefore, our attention was triggered by those legal issues whose proposed solutions lead to relevant uncertainties and that are most suitable for a law and economics analysis.
New tests and applications of the worldline path integral in the first order formalism
Creators: name: Fosco, C. D.
name: Sanchez-Guillen, J.
name: Vazquez, R. A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present different non-perturbative calculations within the context of Migdal's representation for the propagator and effective action of quantum particles. We first calculate the exact propagators and effective actions for Dirac, scalar and Proca fields in the presence of constant electromagnetic fields, for an even-dimensional spacetime. Then we derive the propagator for a charged scalar field in a spacelike vortex (i.e., instanton) background, in a long-distance expansion, and the exact propagator for a massless Dirac field in 1+1 dimensions in an arbitrary background. Finally, we present an interpretation of the chiral anomaly in the present context, finding a condition that the paths must fulfil in order to have a non-vanishing anomaly.
description: 26 pages
Die Antwort der Glaubenskongregation auf die Dokumente der anglikanisch/römisch-katholischen internationalen Kommission
Creators: name: Garijo-Guembe, Miguel
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 42 Nr. 1 (1993): Ökumenische Rundschau, Band 42, Heft 1