cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Multifunctional nanocarriers encapsulating anti-Alzheimer drug for nasal delivery to central nervous system
Creators: name: Corace, Giuseppe <1983>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2012
Subjects: CHIM/09 Farmaceutico tecnologico applicativo

description: Alzheimer's disease (AD) is a fatal neurodegenerative condition characterized clinically by progressive memory loss and irreversible cognitive deterioration. It has been shown that there is a progressive degeneration of the brain cholinergic neurons which leads to the appearance of cognitive symptoms of the disease. The aim of this work was the formulation of multifunctional nanocarriers for nasal administration of tacrine-HCl (THA). This route has many advantages; in particular is possible to convey the drug directly to the Central Nervous System, through the olfactory bulb. In particular, were prepared Albumin nanoparticles carrying beta cyclodextrin and two different beta cyclodextrin derivatives (hydroxypropyl beta cyclodextrin and sulphobutylether beta cyclodextrin), and Multifunctional liposomes, prepared using traditional excipients (cholesterol and phosphatidylcholine), partly enriched with α-tocopherol (Toc) and/or polyunsaturated fatty acids (eicosapentaenoic acid and docosahexaenoic acid) (Ω3). Both nanosystems were characterized in terms of size, Zeta potential and encapsulation efficiency. Were also evaluated their functional properties such as  mucoadhesion and permeability, using an ex-vivo assay based on nasal sheep mucosa. On Liposomes were also assessed drug neuronal uptake, cell toxicity, antioxidant and,  cytoprotective activity in the human neuronal cell line SH-SY5Y and finally tocopherol trans-membrane diffusion. Both the nanocarriers produced presented excellent properties and a high potential as new systems for CNS-delivery of anti-Alzheimer drugs via the nasal route.
Galactic model with a phase transition from dark matter to dark energy
Creators: name: Nikitin, Igor
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: This work continues the construction of a recently proposed model of dark matter stars. In this model, dark matter quanta are sterile massless particles that are emitted from the central regions of the galaxy in the radial direction. As a result, at large distances $r$ from the center of the galaxy, the mass density of dark matter has the form $ρ\sim r^{-2}$, in contrast to the homogeneous model $ρ=Const$. In the cosmological context, the homogeneous model with massless particles corresponds to the radiation epoch of the expansion of the universe, while the proposed inhomogeneous model turns out to be equivalent to $Λ$CDM. In this paper, scenarios will be considered in which the radial emission of dark matter is brought into hydrostatic equilibrium with a uniform background. It is shown that solutions exist if the uniform background has an equation of state typical for dark energy. Thus, this model describes a phase transition from dark matter inside the galaxy to dark energy outside of it. The specific mechanism for such a transition could be Bose-Einstein condensation. In addition, the question of what happens if dark matter particles are not sterile, for example, are photons of the Standard Model, is considered.
description: to appear in Proc. of the 24th Bled Workshop "What Comes Beyond Standard Models"
Partial Jucys-Murphy elements and star factorizations
Creators: name: Feray, Valentin
Publisher: name: arXiv
Year: 2009
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05E99

description: In this paper, we look at the number of factorizations of a given permutation into star transpositions. In particular, we give a natural explanation of a hidden symmetry, answering a question of I.P. Goulden and D.M. Jackson. We also have a new proof of their explicit formula. Another result is the normalized class expansion of some central elements of the symmetric group algebra introduced by P. Biane. To obtain this results, we use natural analogs of Jucys-Murphy elements in the algebra of partial permutations of V. Ivanov and S. Kerov. We investigate their properties and use a formula of A. Lascoux and J.Y. Thibon to give the expansion of their power sums on the natural basis of the invariant subalgebra.
description: 12 pages; version 2: minor corrections
Bifidobacterium - Human Host Interaction: Role of Human Plasminogen
Creators: name: Centanni, Manuela <1984>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2012
Subjects: CHIM/11 Chimica e biotecnologia delle fermentazioni

description: Bifidobacterium is an important genus of the human gastrointestinal microbiota, affecting several host physiological features. Despite the numerous Bifidobacterium related health-promoting activities, there is still a dearth of information about the molecular mechanisms at the basis of the interaction between this microorganism and the host. Bacterial surface associated proteins may play an important role in this interaction because of their ability to intervene with host molecules, as recently reported for the host protein plasminogen. Plasminogen is the zymogen of the trypsin-like serine protease plasmin, an enzyme with a broad substrate specificity.
Aim of this thesis is to deepen the knowledge about the interaction between Bifidobacterium and the human plasminogen system and its role in the Bifidobacterium-host interaction process. As a bifidobacterial model, B. animalis subsp. lactis BI07 has been used because of its large usage in dairy and pharmaceutical preparations.
We started from the molecular characterization of the interaction between plasminogen and one bifidobacterial plasminogen receptor, DnaK, a cell wall protein showing high affinity for plasminogen, and went on with the study of the impact of intestinal environmental factors, such as bile salts and inflammation, on the plasminogen-mediated Bifidobacterium-host interaction. According to our in vitro findings, by enhancing the activation of the bifidobacterial bound plasminogen to plasmin, the host inflammatory response results in the decrease of the bifidobacterial adhesion to the host enterocytes, favouring bacterial migration to the luminal compartment. Conversely, in the absence of inflammation, plasminogen acts as a molecular bridge between host enterocytes and bifidobacteria, enhancing Bifidobacterium adhesion. Furthermore, adaptation to physiological concentrations of bile salts enhances the capability of this microorganism to interact with the host plasminogen system.
The host plasminogen system thus represents an important and flexible tool used by bifidobacteria in the cross-talk with the host.
Multi Expression Programming -- an in-depth description
Creators: name: Oltean, Mihai
Publisher: name: arXiv
Year: 2021
Subjects: subject: Neural and Evolutionary Computing (cs.NE)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Multi Expression Programming (MEP) is a Genetic Programming variant that uses a linear representation of chromosomes. MEP individuals are strings of genes encoding complex computer programs. When MEP individuals encode expressions, their representation is similar to the way in which compilers translate $C$ or $Pascal$ expressions into machine code. A unique MEP feature is the ability to store multiple solutions of a problem in a single chromosome. Usually, the best solution is chosen for fitness assignment. When solving symbolic regression or classification problems (or any other problems for which the training set is known before the problem is solved) MEP has the same complexity as other techniques storing a single solution in a chromosome (such as GP, CGP, GEP or GE). Evaluation of the expressions encoded into an MEP individual can be performed by a single parsing of the chromosome. Offspring obtained by crossover and mutation is always syntactically correct MEP individuals (computer programs). Thus, no extra processing for repairing newly obtained individuals is needed.
description: 28 pages, 2 Figures
ECLARE: Extreme Classification with Label Graph Correlations
Creators: name: Mittal, Anshul
name: Sachdeva, Noveen
name: Agrawal, Sheshansh
name: Agarwal, Sumeet
name: Kar, Purushottam
name: Varma, Manik
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computation and Language (cs.CL)
subject: Information Retrieval (cs.IR)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences
subject: F.2.2; I.2.7

description: Deep extreme classification (XC) seeks to train deep architectures that can tag a data point with its most relevant subset of labels from an extremely large label set. The core utility of XC comes from predicting labels that are rarely seen during training. Such rare labels hold the key to personalized recommendations that can delight and surprise a user. However, the large number of rare labels and small amount of training data per rare label offer significant statistical and computational challenges. State-of-the-art deep XC methods attempt to remedy this by incorporating textual descriptions of labels but do not adequately address the problem. This paper presents ECLARE, a scalable deep learning architecture that incorporates not only label text, but also label correlations, to offer accurate real-time predictions within a few milliseconds. Core contributions of ECLARE include a frugal architecture and scalable techniques to train deep models along with label correlation graphs at the scale of millions of labels. In particular, ECLARE offers predictions that are 2 to 14% more accurate on both publicly available benchmark datasets as well as proprietary datasets for a related products recommendation task sourced from the Bing search engine. Code for ECLARE is available at https://github.com/Extreme-classification/ECLARE.
Supplementary Tables and Figures from δ13C methane source signatures from tropical wetland and rice field emissions
Creators: name: France, James L.
name: Fisher, Rebecca E.
name: Lowry, David
name: Allen, Grant
name: Andrade, Marcos F.
name: Bauguitte, Stéphane J.-B.
name: Bower, Keith
name: Broderick, Timothy J.
name: Daly, Michael C.
name: Forster, Grant
name: Gondwe, Mangaliso
name: Helfter, Carole
name: Hoyt, Alison M.
name: Jones, Anna E.
name: Lanoisellé, Mathias
name: Moreno, Isabel
name: Nisbet-Jones, Peter B. R.
name: Oram, David
name: Pasternak, Dominika
name: Pitt, Joseph R.
name: Skiba, Ute
name: Stephens, Mark
name: Wilde, Shona E.
name: Nisbet, Euan G.
Publisher: name: The Royal Society
Year: 2021
Subjects: subject: Environmental Chemistry
subject: Atmospheric Sciences
subject: FOS: Earth and related environmental sciences
subject: 40199 Atmospheric Sciences not elsewhere classified

description: Detailed site location information along with extra information on Botswana and Bolivian long-term time series data
The EU and Dispute Settlement within the WTO:
a strategy for the protection of the Union’s autonomy
in the domestic regulation of goods?
Creators: name: Bonavita, Valeria <1983>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2012
Subjects: IUS/14 Diritto dell'Unione Europea

description: Oggetto della ricerca è l’accertamento dell’esistenza, nonché la definizione, della strategia dall’UE in materia di controversie commerciali aventi ad oggetto l’interpretazione e l’applicazione di norme facenti capo agli Accordi OMC in materia di misure sanitarie e di barriere tecniche al commercio.
Nella prima parte della tesi, si ricostruiscono gli obbiettivi perseguiti dall’UE in materia di controversie SPS e TBT. In questo contesto, un’importanza di primo piano è attribuita alla difesa dell’autonomia regolamentare dell’Unione. Ad essa si riconduce la prassi UE finalizzata a prevenire il sorgere di controversie sul piano bilaterale attraverso la conclusione di accordi di mutuo riconoscimento, la cui portata ella sottolinea essere tuttavia limitata. L’analisi di cinque controversie sorte in ambito OMC di cui l’Unione è o è stata parte convenuta e che si fondano su presunte o accertate violazioni delle norme facenti capo ai due accordi menzionati consente di classificare gli argomenti giuridici avanzati dall’Unione nel contesto di tali controversie.
Nella seconda parte della ricerca, la candidata identifica i mezzi a servizio della strategia UE, in primo luogo, attraverso l’analisi del quadro giuridico relativo alla partecipazione dell’Unione e degli Stati Membri al sistema OMC di risoluzione delle controversie; in secondo luogo, attraverso lo studio, da un lato, dello status delle norme OMC nell’ordinamento UE e, dall’altro, degli effetti delle pronunce dell’Organo di Risoluzione delle Controversie e della questione della responsabilità dell’Unione per violazione del diritto OMC.
Sulla base del lavoro di ricerca svolto, si conclude che una strategia dell’UE esiste nella misura in cui l’Unione persegue l’obbiettivo di preservare la propria autonomia regolamentare attraverso, anche se non esclusivamente, gli strumenti afferenti all’ordine giuridico interno analizzati nella seconda parte. La candidata conclude altresì che la riforma del diritto delle relazioni esterne operata dal Trattato di Lisbona può indurre un cambiamento di tale strategia.
Supplementary Tables and Figures from δ13C methane source signatures from tropical wetland and rice field emissions
Creators: name: France, James L.
name: Fisher, Rebecca E.
name: Lowry, David
name: Allen, Grant
name: Andrade, Marcos F.
name: Bauguitte, Stéphane J.-B.
name: Bower, Keith
name: Broderick, Timothy J.
name: Daly, Michael C.
name: Forster, Grant
name: Gondwe, Mangaliso
name: Helfter, Carole
name: Hoyt, Alison
name: Jones, Anna E.
name: Lanoisellé, Mathias
name: Moreno, Isabel
name: Nisbet-Jones, Peter B. R.
name: Oram, David
name: Pasternak, Dominika
name: Pitt, Joseph R.
name: Skiba, Ute
name: Stephens, Mark
name: Wilde, Shona E.
name: Nisbet, Euan G.
Publisher: name: The Royal Society
Year: 2021
Subjects: subject: Environmental Chemistry
subject: Atmospheric Sciences
subject: FOS: Earth and related environmental sciences
subject: 40199 Atmospheric Sciences not elsewhere classified

description: Detailed site location information along with extra information on Botswana and Bolivian long-term time series data
Supercritical accretion of stellar-mass compact objects in active galactic nuclei
Creators: name: Pan, Zhen
name: Yang, Huan
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Accretion disks of active galactic nuclei (AGN) have been proposed as promising sites for producing both (stellar-mass) compact object mergers and extreme mass ratio inspirals. Along with the disk-assisted migration/evolution process, ambient gas materials inevitably accrete onto the compact objects. The description of this process is subject to significant theoretical uncertainties in previous studies. It was commonly assumed that either an Eddington accretion rate or a Bondi accretion rate (or any rate in between) takes place, although these two rates can differ from each other by several orders of magnitude. As a result, the mass and spin evolution of compact objects within AGN disks are essentially unknown. In this work, we construct a relativistic supercritical inflow-outflow model for black hole (BH) accretion. We show that the radiation efficiency of the supercritical accretion of a stellar-mass BH (sBH) is generally too low to explain the proposed electromagnetic counterpart of GW190521. Applying this model to sBHs embedded in AGN disks, we find that, although the gas inflow rates at Bondi radii of these sBHs are in general highly super-Eddington, a large fraction of inflowing gas eventually escapes as outflows so that only a small fraction accretes onto the sBH, resulting in mildly super-Eddington BH absorption in most cases. We also implement this inflow-outflow model to study the evolution of neutron stars (NS) and white dwarfs (WD) in AGN disks, taking into account corrections from star sizes and star magnetic fields. It turns out to be difficult for WDs to grow to the Chandrasekhar limit via accretion because WDs are spun up more efficiently to reach the shedding limit before the Chandrasekhar limit. For NSs the accretion-induced collapse is possible if NS magnetic fields are sufficiently strong, keeping the NS in a slow rotation state during accretion.
ATOMS: ALMA Three-millimeter Observations of Massive Star-forming regions -- IV. Radio Recombination Lines and evolution of star formation efficiencies
Creators: name: Zhang, C.
name: Evans, Neal J.
name: Liu, T.
name: Wu, J. -W.
name: Wang, Ke
name: Liu, H. -L.
name: Zhu, F. -Y.
name: Ren, Z. -Y.
name: Dewangan, L. K.
name: Lee, Chang Won
name: Li, Shanghuo
name: Bronfman, L.
name: Tej, A.
name: Li, D.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We report detection of radio recombination line (RRL) H$_{40α}$ toward 75 sources, with data obtained from ACA observations in the ATOMS survey of 146 active Galactic star forming regions. We calculated ionized gas mass and star formation rate with H40U line emission. The mass of ionized gas is significantly smaller than molecular gas mass, indicating that ionized gas is negligible in the star forming clumps of the ATOMS sample. The star formation rate (SFR$_{{\rm H}_{40α}}$) estimated with RRL H$_{40α}$ agrees well with that (SFR$_{\rm L_{bol}}$) calculated with the total bolometric luminosity (L$_{\rm bol}$) when SFR $\gtrsim 5 {\rm M_\odot My}r^{-1}$, suggesting that millimeter RRLs could well sample the upper part of the initial mass function (IMF) and thus be good tracers for SFR. We also study the relationships between L$_{\rm bol}$ and the molecular line luminosities (L0mol) of CS J=2-1 and HC$_3$N J=11-10 for all the 146 ATOMS sources. The Lbol-L0mol correlations of both the CS J=2-1 and HC3N J=11-10 lines appear approximately linear and these transitions have success in predicting L$_{\rm bol}$ similar to that of more commonly used transitions. The L$_{\rm bol}$-to-L$_{\rm mol}$ ratios or SFR-to-mass ratios (star formation efficiency; SFE) do not change with galactocentric distances (R$_{\rm GC}$). Sources with H$_{40α}$ emission (or H$_{\rm II}$ regions) show higher L$_{\rm bol}$-to-L$_{\rm mol}$ than those without H$_{40α}$ emission, which may be an evolutionary effect.
Wreath Hecke algebras and centralizer construction for wreath products
Creators: name: Wan, Jinkui
Publisher: name: arXiv
Year: 2008
Subjects: subject: Representation Theory (math.RT)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics

description: Generalizing the centralizer construction of Molev and Olshanski on symmetric groups, we study the structures of the centralizer $\mZ_{m,n}$ of the wreath product $G_{n-m}$ in the group algebra of $G_n$ for any $n\geq m$. We establish the connection between $\mZ_{m,n}$ and a generalization of degenerate affine Hecke algebras introduced in our earlier work.
description: 27 pages, v2, to appear in J. Algebra.
D6.2 Risk register
Creators: name: Stahl, Bernd
name: Bhalla, Nitika
name: Schroeder, Doris
name: Klar, Renate
Publisher: name: De Montfort University
Year: 2021
Subjects: subject: 80609 Information Systems Management
subject: FOS: Computer and information sciences

description: This deliverable explains how the SHERPA project ensures that any potential risks are identified from the outset of the project. It outlines the critical risks for implementation as well as the proposed risk mitigation measures.
Radioattività naturale nei prodotti ceramici: valutazioni teoriche e sperimentali degli effetti ambientali e sanitari
Creators: name: Verità, Simona <1977>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2009
Subjects: FIS/07 Fisica applicata (a beni culturali, ambientali, biologia e medicina)

description: I materiali zirconiferi, in particolare i silicati di zirconio e l’ossido di zirconio, vengono ampiamente utilizzati in diverse applicazioni industriali: fra queste, l’industria delle piastrelle ceramiche e di produzione dei materiali refrattari ne consuma quantitativi consistenti.
Misure di spettrometria gamma condotte su diversi campioni di materiale zirconifero (farine di zirconio e  sabbie zirconifere) utilizzati nell’industria ceramica per la produzione del gres porcellanato e delle piastrelle smaltate, hanno messo in evidenza valori di concentrazione di attività superiori a quelli presenti mediamente sulla crosta terrestre (35, 30 Bqkg-1 per il 238U e il 232Th, rispettivamente [Unscear, 2000]).
L’aggiunta del materiale zirconifero nella preparazione delle piastrelle ceramiche in particolare di quelle smaltate (in una percentuale in peso pari al 10-20%) del gres porcellanato (in una percentuale in peso di 1-10%) e delle lamine di gres porcellanato “sottile” (in una percentuale in peso dell’ordine del 30%), conferisce al prodotto finale un alto grado di bianco, buone caratteristiche meccaniche ed un elevato effetto opacizzante, ma comporta anche un arricchimento in radionuclidi naturali. 
L’obiettivo principale di questo lavoro di tesi è stato quello di mettere a punto una metodologia (teorica e sperimentale) per valutare l’incremento di esposizione che possono ricevere un lavoratore standard di una industria ceramica ed una persona del pubblico che soggiorna in un ambiente rivestito con piastrelle.
Da un lato, la presenza di radioattività nelle sabbie zirconifere, utilizzate come materie prime per la produzione di piastrelle, porta a considerare il problema dell’incremento di esposizione che può subire un lavoratore impiegato in ambiente di lavoro dove sono stoccati e manipolati consistenti quantitativi di materiale, dall’altro il contenuto di radioattività nel prodotto finito porta a considerare l’esposizione per una persona della popolazione che soggiorna in una stanza rivestita con materiale ceramico.
Le numerose misure effettuate, unitamente allo sviluppo dei modelli necessari per valutare le dosi di esposizione per le persone del pubblico e dei lavoratori impiegati nel processo di produzione di piastrelle ceramiche, hanno permesso di mettere a punto una procedura che fornisce le garanzie necessarie per dichiarare accettabili le condizioni di lavoro nelle industrie ceramiche e più in generale il rispetto delle norme radioprotezionistiche per gli occupanti di ambienti rivestiti con piastrelle italiane.
Effects of modified dispersion relations on free Fermi gas: equations of state and applications in astrophysics
Creators: name: Santos, Luis C. N.
name: Mota, Clésio E.
name: da Silva, Franciele M.
name: Grams, Guilherme
name: Lobo, I. P.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: Deformed dispersion relations are considered in the study of equations of state of Fermi gas with applications to compact objects. Different choices of deformed energy relations are used in the formulation of our model. As a first test, we consider a relativistic star with a simple internal structure. The mass-radius diagrams obtained suggest a positive influence of deformed Fermi gas, depending of the functions employed. In addition, we comment on how realistic equations of state, in which interactions between nucleons are taken into account, can be addressed.
Quantum Melting of Spin Ice: Emergent Cooperative Quadrupole and Chirality
Creators: name: Onoda, Shigeki
name: Tanaka, Yoichi
Publisher: name: arXiv
Year: 2009
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: A quantum melting of the spin ice is proposed for pyrochlore-lattice magnets Pr$_2TM_2$O$_7$ ($TM=$Ir, Zr, and Sn). The quantum superexchange Hamiltonian having a nontrivial magnetic anisotropy is derived in the basis of atomic non-Kramers magnetic doublets. The ground states exhibit a cooperative ferroquadrupole and pseudospin chirality, forming a magnetic analog of smectic liquid crystals. Our theory accounts for dynamic spin-ice behaviors experimentally observed in Pr$_2TM_2$O$_7$.
description: 4 pages including 4 fgures; accepted for publication in Phys. Rev. Lett.; powder-neutron scatteing profile added in favorable comparison with experiment
Managing Public Rangelands: Effective Livestock Grazing Practices and Systems for National Forests and National Grasslands
Creators: name: Driscoll, Richard S.
name: Driscoll, Richard S.
Publisher: name: Unknown
Year: 1967
Subjects: Agricultural and Food Policy
Land Economics/Use
Livestock Production/Industries

description: Excerpt from the report: This brochure presents the basic principles of various grazing practices and systems that might be used on National Forests and National Grasslands. No attempt is made to promote the use of a particular system. Rather, it is intended that stockmen and administrators use the following information to help design grazing plans best suited for particular range areas.
L'intuizionismo etico di George Edward Moore
Creators: name: Scardovi, Gabriele <1974>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2009
Subjects: M-FIL/03 Filosofia morale

description: La Tesi di Dottorato prende in considerazione la collocazione storica e critica di G. E. Moore nel panorama filosofico europeo, con particolare riferimento al suo rapporto con il neo-hegelismo britanico prima e con il realismo poi. Al centro della Tesi si trova l'esame dell'intuizionismo etico di G. E. Moore.
On Pebble Automata for Data Languages with Decidable Emptiness Problem
Creators: name: Tan, Tony
Publisher: name: arXiv
Year: 2009
Subjects: subject: Formal Languages and Automata Theory (cs.FL)
subject: FOS: Computer and information sciences
subject: F.1.1; F.4.1; F.4.3

description: In this paper we study a subclass of pebble automata (PA) for data languages for which the emptiness problem is decidable. Namely, we introduce the so-called top view weak PA. Roughly speaking, top view weak PA are weak PA where the equality test is performed only between the data values seen by the two most recently placed pebbles. The emptiness problem for this model is decidable. We also show that it is robust: alternating, nondeterministic and deterministic top view weak PA have the same recognition power. Moreover, this model is strong enough to accept all data languages expressible in Linear Temporal Logic with the future-time operators, augmented with one register freeze quantifier.
description: An extended abstract of this work has been published in the proceedings of the 34th International Symposium on Mathematical Foundations of Computer Science (MFCS) 2009}, Springer, Lecture Notes in Computer Science 5734, pages 712-723
Stochastic Model of Microparticle Scattering on a Crystal
Creators: name: Batanov-Gaukhman, Mikhail
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: In this paper, based on the analysis of the formula (2.2) for calculating the elastic scattering diagrams of microparticles on a multilayer crystal surface, derived by the author in the article [3], it is shown that the stochastic approach to solving the problem of scattering of elementary particles on crystals can serve as an alternative to the Louis de Broglie hypothesis about the wave properties of material particles. The results of calculations by formula (2.2), presented in this pa-per, are in good agreement with the experimentally obtained electron diffraction patterns and X-ray diffraction patterns and the Davisson-Germer experiments.
description: 18 pages, 21 figures. arXiv admin note: substantial text overlap with arXiv:2007.13527
Optimal navigation strategy of active Brownian particles in target-search problems
Creators: name: Zanovello, Luigi
name: Faccioli, Pietro
name: Franosch, Thomas
name: Caraglio, Michele
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We investigate exploration patterns of a microswimmer, modeled as an active Brownian particle, searching for a target region located in a well of an energy landscape and separated from the initial position of the particle by high barriers. We find that the microswimmer can enhance its success rate in finding the target by tuning its activity and its persistence in response to features of the environment. The target-search patterns of active Brownian particles are counterintuitive and display characteristics robust to changes of the energy landscape. On the contrary, the transition rates and transition-path times are sensitive to the details of the specific energy landscape. In striking contrast to the passive case, the presence of additional local minima does not significantly slow down the active target-search dynamics.
description: 23 pages, 8 figures
Gibbs entropy of networks ensembles by cavity methods
Creators: name: Anand, Kartik
name: Bianconi, Ginestra
Publisher: name: arXiv
Year: 2010
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: The Gibbs entropy of a microcanonical network ensemble is the logarithm of the number of network configurations compatible with a set of hard constraints. This quantity characterizes the level of order and randomness encoded in features of a given real network. Here we show how to relate this entropy to large deviations of conjugated canonical ensembles. We derive exact expression for this correspondence using the cavity methods for some hard constraints.
description: 8 pages
Reconstruction of CNGS neutrino events in the emulsions of the OPERA experiment
Creators: name: Pozzato, Michele <1980>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2009
Subjects: FIS/01 Fisica sperimentale

description: The OPERA experiment aims at the direct observation of ν_mu -> ν_tau oscillations in the CNGS (CERN Neutrinos to Gran Sasso) neutrino beam produced at CERN; since the ν_e contamination in the CNGS beam is low, OPERA will also be able to study the sub-dominant oscillation channel ν_mu -> ν_e. 

OPERA is a large scale hybrid apparatus divided in two supermodules, each equipped with electronic detectors, an iron spectrometer and a highly segmented ~0.7 kton target section made of Emulsion Cloud Chamber (ECC) units. 
During my research work in the Bologna Lab. I have taken part to the set-up of the automatic scanning microscopes studying and tuning the scanning system performances and efficiencies with emulsions exposed to a test beam at CERN in 2007. 
Once the triggered bricks were distributed to the collaboration laboratories, my work was centered on the procedure used for the localization and the reconstruction of neutrino events.
Polarization Resolved Optical Excitation of Charge-Transfer Excitons in PEN:PFP Co-Crystalline Films: Limits of Non-Periodic Modelling
Creators: name: Günder, Darius
name: Valencia, Ana M.
name: Guerrini, Michele
name: Breuer, Tobias
name: Cocchi, Caterina
name: Witte, Gregor
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Charge-transfer excitons (CTX) at organic donor/acceptor interfaces are considered important intermediates for charge separation in photovoltaic devices. Crystalline model systems provide microscopic insights into the nature of such states as they enable microscopic structure-property investigations. Here, we use angular-resolved UV/Vis absorption spectroscopy to characterize the CTX of crystalline pentacene:perfluoro-pentacene (PEN:PFP) films allowing to determine the polarization of this state. This analysis is complemented by first-principles many-body calculations, performed on the three-dimensional PEN:PFP co-crystal, which confirm that the lowest-energy excitation is a CTX. Analogous simulations performed on bimolecular clusters are unable to reproduce this state. We ascribe this failure to the lack of long-range interactions and wave-function periodicity in these cluster calculations, which appear to remain a valid tool for modelling properties of organic materials ruled by local intermolecular couplings.
A Pettis-Type Integral and Applications to Transition Semigroups
Creators: name: Kunze, Markus
Publisher: name: arXiv
Year: 2009
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 46G10, 47D03, 60J35

description: Motivated by applications to transition semigroups, we introduce the notion of a norming dual pair and study a Pettis-type integral on such pairs. In particular, we establish a sufficient condition for integrability. We also introduce and study a class of semigroups on such dual pairs which are an abstract version of transition semigroups. Using our results, we give conditions ensuring that a semigroup consisting of kernel operators has a Laplace transform which also consists of kernel operators. We also provide conditions under which a semigroup is uniquely determined by its Laplace transform.
description: Incorporated referee's comments; final version
Computing the vertices of tropical polyhedra using directed hypergraphs
Creators: name: Allamigeon, Xavier
name: Gaubert, Stephane
name: Goubault, Eric
Publisher: name: arXiv
Year: 2009
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05B35, 52B55, 68Q25, 68U05

description: We establish a characterization of the vertices of a tropical polyhedron defined as the intersection of finitely many half-spaces. We show that a point is a vertex if, and only if, a directed hypergraph, constructed from the subdifferentials of the active constraints at this point, admits a unique strongly connected component that is maximal with respect to the reachability relation (all the other strongly connected components have access to it). This property can be checked in almost linear-time. This allows us to develop a tropical analogue of the classical double description method, which computes a minimal internal representation (in terms of vertices) of a polyhedron defined externally (by half-spaces or hyperplanes). We provide theoretical worst case complexity bounds and report extensive experimental tests performed using the library TPLib, showing that this method outperforms the other existing approaches.
description: 29 pages (A4), 10 figures, 1 table; v2: Improved algorithm in section 5 (using directed hypergraphs), detailed appendix; v3: major revision of the article (adding tropical hyperplanes, alternative method by arrangements, etc); v4: minor revision
Nucleation of Ge quantum dots on the Si(001) surface
Creators: name: Arapkina, Larisa V.
name: Yuryev, Vladimir A.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A direct observation of nucleation of Ge hut clusters formed by ultrahigh vacuum molecular beam epitaxy is reported for the first time. The nuclei of the pyramidal and wedge-like clusters have been observed on the wetting layer blocks and found to have different structures. The growth of the clusters of both species goes on following different scenarios: Formation of the second atomic layer of the wedge-like cluster results in rearrangement of its first layer. Its ridge structure does not replicate the structure of the nucleus. The pyramidal cluster grows without phase transitions. The structure of its vertex copies the structure of the nucleus. The wedge-like clusters contain point defects on the triangular faces and have preferential directions of growth along the ridges. The derived structure of the {105} facet corresponds to the PD model. The critical epinucleation phenomenon may be responsible for hut formation.
description: 6 pages, 6 figures; Fig. 4e has been improved; additional explanations have been added. To appear in Phys. Rev. B
Il rapporto tra politica e pubblica amministrazione e la disciplina della dirigenza: il modello spagnolo e italiano
The relationship between politics and Public Administration and the discipline of managers: the Spanish and the Italian model
Creators: name: Ramos Moragues, Francisco <1980>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2012
Subjects: IUS/07 Diritto del lavoro

description: L’oggetto di studio dela tesi sono proprio le relazioni esistenti tra la Politica e la Pubblica Amministrazione dalla prospettiva dei dirigenti pubblici. Ancora più concretamente, l’analisi proposta si basa sull’articolazione di tale rapporto nel modello di funzione pubblica adottato in Italia e in Spagna. La tesi è strutturata in tre grandi capitoli. Il primo di essi verte, in generale, sullo studio delle relazioni tra la Politica e la Pubblica Amministrazione in Spagna. Il secondo capitolo, sarà destinato allo studio del rapporto tra politica e pubblica amministrazione in Italia, affrontato secondo una prospettiva storica. Nel terzo ed ultimo capitolo viene affrontato in modo dettagliato il regime giuridico del personale dirigente in vigore, così come appare delineato dopo la riforma realizzata dalla legge n. 15/2009, sviluppata attraverso il d.lgs. n. 150/2009, ovvero la cosiddetta riforma “Brunetta”.
description: The aim of this thesis is the study of the relationships between politics and Public Administration distinguishing between the Spanish and the Italian model. Regarding its structure, it is divided into three chapters, preceded by an introduction and followed by some conclusions. The first one is focused on the Spanish model, both on the historical background and on the current situation in which it is highlighted the approval of the Law No. 7/2007 on the Basic Statute of the Public Worker. The second one analyses the Italian model from an historical perspective. Finally, the third chapter is focused in detail on the reform carried out by the Law No. 15/2009 and the Legislative Decree No. 150/2009 that develops the previous one.
Holographic thermal correlators revisited
Creators: name: Krishna, Hare
name: Rodriguez-Gomez, D.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study 2-point correlation functions for scalar operators in position space through holography including bulk cubic couplings as well as higher curvature couplings to the square of the Weyl tensor. We focus on scalar operators with large conformal dimensions. This allows us to use the geodesic approximation for propagators. In addition to the leading order contribution, captured by geodesics anchored at the insertion points of the operators on the boundary and probing the bulk geometry thoroughly studied in the literature, the first correction is given by a Witten diagram involving both the bulk cubic coupling and the higher curvature couplings. As a result, this correction is proportional to the VEV of a neutral operator $O_k$ and thus probes the interior of the black hole exactly as in the case studied by Grinberg and Maldacena [13]. The form of the correction matches the general expectations in CFT and allows to identify the contributions of $T^nO_k$ (being $T^n$ the general contraction of n energy-momentum tensors) to the 2-point function. This correction is actually the leading term for off-diagonal correlators (i.e. correlators for operators of different conformal dimension), which can then be computed holographically in this way.
description: 23 pages
The solar, exoplanet and cosmological lithium problems
Creators: name: Melendez, J.
name: Ramirez, I.
name: Casagrande, L.
name: Asplund, M.
name: Gustafsson, B.
name: Yong, D.
name: Nascimento, J. D. do
name: Castro, M.
name: Bazot, M.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We review three Li problems. First, the Li problem in the Sun, for which some previous studies have argued that it may be Li-poor compared to other Suns. Second, we discuss the Li problem in planet hosting stars, which are claimed to be Li-poor when compared to field stars. Third, we discuss the cosmological Li problem, i.e. the discrepancy between the Li abundance in metal-poor stars (Spite plateau stars) and the predictions from standard Big Bang Nucleosynthesis. In all three cases we find that the "problems" are naturally explained by non-standard mixing in stars.
description: Astrophysics and Space Science, in press. New version has one reference corrected
Three-body problem in heteronuclear mixtures with resonant interspecies interaction
Creators: name: Helfrich, K.
name: Hammer, H. -W.
name: Petrov, D. S.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We use the zero-range approximation to study a system of two identical bosons interacting resonantly with a third particle. The method is derived from effective field theory. It reduces the three-body problem to an integral equation which we then solve numerically. We also develop an alternative approach which gives analytic solutions of the integral equation in coordinate representation in the limit of vanishing total energy. The atom-dimer scattering length, the rates of atom-dimer relaxation and three-body recombination to shallow and to deep molecular states are calculated either analytically or numerically with a well controlled accuracy for various energies as functions of the mass ratio, scattering length, and three-body parameter. We discuss in detail the relative positions of the recombination loss peaks, which in the universal limit depend only on the mass ratio. Our results have implications for ongoing and future experiments on Bose-Bose and Bose-Fermi atomic mixtures.
description: 13 pages, 8 figures, minor changes, published version
Russia’s divided democrats: Splits and barriers to coalition-building (2011-2019)
Creators: name: Selnitsyna, Marina
Publisher: name: University of Limerick
Year: 2022

description: This thesis analyses fragmentation within the Russian democratic movement during the period between 2011 and 2019 in order to identify the primary causes of this phenomenon. Despite their mutual opposition to the Putin’s regime, independent opposition parties in Russia struggled to unite in a coalition. The literature on the topic of opposition fragmentation in undemocratic countries primarily focuses on external factors related to institutional barriers (such as strong presidency) or political environment (such as the divide-and-rule strategy of political elites), whereas internal factors remain understudied. There is a category of studies that explore the reasons behind the divisions between liberal-democratic parties during the earlier period of Russian history – during the Yel’tsin and early Putin presidencies; these studies outline both external and internal causes of opposition fragmentation. However, changes in the Russian regime and the emergence of a new generation of political forces justify an up-to-date examination of this phenomenon.
 My main findings are based on the case study and qualitative interview analysis. The thesis studies two cases of party splits and two unsuccessful attempts to form a broad opposition coalition. In order to gain a deeper understanding of reasons for these divisions, 19 interviews were conducted with Moscow-based opposition activists and local leaders from different opposition parties and movements. Interviewees were asked about their attitudes towards cooperation with other opposition forces and their opinions regarding the divisions that occurred during the last decade.
 This study outlines a range of internal factors that contributed to the opposition fragmentation in Russia: they are related to the ineffectiveness within opposition parties and coalitions that led to the defection of members and the unwillingness of more effective opposition groups to cooperate with the less effective ones, a distrust between opposition groups who expressed different levels of opposition to the regime, weak democratic mechanisms within parties and coalitions that resulted in splits and the unequal balance of power between registered and unregistered parties that complicated coalition negotiations.
Finite-size effects in the dependency networks of free and open-source software
Creators: name: Nair, Rajiv
name: Nagarjuna, G.
name: Ray, Arnab K.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Other Computer Science (cs.OH)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: We propose a continuum model for the degree distribution of directed networks in free and open-source software. The degree distributions of links in both the in-directed and out-directed dependency networks follow Zipf's law for the intermediate nodes, but the heavily linked nodes and the poorly linked nodes deviate from this trend and exhibit finite-size effects. The finite-size parameters make a quantitative distinction between the in-directed and out-directed networks. For the out-degree distribution, the initial condition for a dynamic evolution corresponds to the limiting count of the most heavily liked nodes that the out-directed network can finally have. The number of nodes contributing out-directed links grows with every generation of software release, but this growth ultimately saturates towards a terminal value due to the finiteness of semantic possibilities in the network.
description: ReVTeX, 9 pages, 7 figures. Major revisions in Sections III and IV of this version. The bibliography has been updated
title: An Investigation of Extended Proinov Contraction under Non-Triangular Metric Structure and the Corresponding Applications
Creators: name: Jeevan, Ram
Publisher: name: Research Administration Division
publisherIdentifierScheme: ROR
Year: 2025
Subjects: Non-triangular Metric Space (NTMS)
Proinov Fixed Point Theorem
InitialValue Problem (IVP)
Parabolic Partial Differential Equation
Stochastic Integral Equation

description: Science & Technology Asia, 30, 1, 1-13