cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Solution-processed deep-blue (y∼0.06) fluorophores based on triphenylamine-imidazole (donor-acceptor) for OLEDs: computational and experimental exploration
Creators: name: Girase, Jaipal Devesing
name: Nayak, Sandhya Rani
name: Tagare, Jairam
name: Shahnawaz
name: Nagar, Mangey Ram
name: Jou, Jwo-Huei
name: Vaidyanathan, Sivakumar
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Biophysics
subject: Biochemistry
subject: Space Science
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Physiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified

description: Developing solution-processable deep-blue emitters for organic light-emitting diodes (OLEDs) is still a challenging task. In this context, two new solution-processable deep-blue emitters, N, N-diphenyl-4’-(1-(3-(trifluoromethyl)phenyl)-1H-phenanthro[9,10-d]imidazol-2-yl)-[1,1’-biphenyl]-4-amine(4-PIMCFTPA) and 4’-(4,5-diphenyl-1-(3-(trifluoromethyl)phenyl)-1H-imidazol-2-yl)-N,N-diphenyl-[1,1’-biphenyl]-4-amine (4-BICFTPA), were successfully designed and synthesized by incorporating phenanthroimidazole (PI)/diphenylimidazole (BI)-triphenylamine (TPA), which is functional at the N1 position of the imidazole, with Ph-mCF3. The thermal, photophysical, and electrochemical properties of both fluorophores were systematically explored. These fluorophores showed a deep-blue emission in the solution as well as in the solid state. The highest occupied molecular orbital (HOMO) – lowest unoccupied molecular orbital (LUMO) energy level of the fluorophores was calculated using electrochemical studies and compared with the theoretical calculation [the density functional theory (DFT)]. The asymmetrically twisted conformation of 4-PIMCFTPA between PI-TPA efficiently showed a high photoluminescence quantum yield. OLED (undoped and doped) devices were fabricated with the newly synthesized emitters, and 4-PIMCFTPA demonstrated better electroluminescence (EL) performance than the BI-based emitter. Thus, the OLED based on 4-PIMCFTPA (1 wt% in the CBP host) had the best EL performance, with a maximum external quantum efficiency 1.7% and CIE coordinates of (0.17, 0.06).
Quantum Graphical Models and Belief Propagation
Creators: name: Leifer, Matthew
name: Poulin, David
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Belief Propagation algorithms acting on Graphical Models of classical probability distributions, such as Markov Networks, Factor Graphs and Bayesian Networks, are amongst the most powerful known methods for deriving probabilistic inferences amongst large numbers of random variables. This paper presents a generalization of these concepts and methods to the quantum case, based on the idea that quantum theory can be thought of as a noncommutative, operator-valued, generalization of classical probability theory. Some novel characterizations of quantum conditional independence are derived, and definitions of Quantum n-Bifactor Networks, Markov Networks, Factor Graphs and Bayesian Networks are proposed. The structure of Quantum Markov Networks is investigated and some partial characterization results are obtained, along the lines of the Hammersely-Clifford theorem. A Quantum Belief Propagation algorithm is presented and is shown to converge on 1-Bifactor Networks and Markov Networks when the underlying graph is a tree. The use of Quantum Belief Propagation as a heuristic algorithm in cases where it is not known to converge is discussed. Applications to decoding quantum error correcting codes and to the simulation of many-body quantum systems are described.
description: 58 pages, 9 figures
Doubly Forced Anharmonic Oscillator Model for Floating Potential Fluctuations in DC Glow Discharge Plasma
Creators: name: Jayaprakash, K.
name: Alex, Prince
name: Saravanan, A.
name: Perumal, M.
name: Singh, Thangjam Rishikanta
name: Sinha, Suraj Kumar
Publisher: name: arXiv
Year: 2021
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: The Floating Potential Fluctuations (FPF) observed in a dc glow discharge plasma powered with two sources is modeled using an anharmonic oscillator with two forcing terms. In the discharge system, one of the electrode is biased to a negative voltage source (i.e. cathode), and the second electrode is biased to a positive voltage source (i.e. anode), while the stainless-steel vacuum chamber is grounded. The dc glow discharge plasma is generated by the application of negative voltage on the cathode with respect to the grounded chamber using one of the power supplies. On the application of positive voltage to the anode using second power supply results in formation of a potential structure on achieving the triggering criteria. This potential structure is referred as anodic double layer (ADL). The evolution of ADL is associated with FPF. Therefore, FPF is analyzed to characterize the ADL's dynamical features. In this work, the experimentally observed FPF compared with numerically obtained oscillations using an anharmonic oscillator model with two forcing terms. Each of these forcing terms are associated with the two power supplies used in the experiment. The experimentally and numerically obtained oscillations from the model are studied using phase-space plot, FFT, Largest Lyapunov exponent (LLE). The dynamical features of oscillations obtained by the model show strong agreement with the experiment and can be extended for a description of complex systems driven by multiple forces.
description: 11 pages, 7 figures
The design and implementation of a bibliographic database for the WEDC Resource Centre using the HEADFAST text retrieval system
Creators: name: R. Maler Vilee
Publisher: name: Loughborough University
Year: 2021
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: The design and implementation of a bibliographic database for the WEDC Resource Centre using the HEADFAST text retrieval system
Modeling the interstellar aromatic infrared bands with co-added spectra of PAHs
Creators: name: Pathak, Amit
name: Rastogi, Shantanu
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The observed variations in profiles of the interstellar aromatic infrared bands correlate with the object type and are indicative of PAH populations existing i n different sources. Spectroscopic studies on PAHs can provide tools for the int erpretation of variations accompanying the AIBs. As the observed spectra results from a mix of possible species in the region attempt is made to model this comp osite spectra by co-adding emissions from PAHs in different size groups. Theoretical IR data of PAHs having 10 to 96 carbon atoms is used to obtain emis sion spectra. The models are taken in size groups making up of small, medium and large PAHs. The models show good profile match with observations for the 7.7 $μm$ complex having sub-features at 7.6 and 7.8 $μm$. The 7.6 $μm$ sub-feature dominates in the spectra of medium sized PAH cations matching observations from UV rich interstellar environments. The 7.8 $μm$ component is more intense in the spectra of large PAH cations (model III) correlating with observations from benign astrophysical regions. A possible interpretation for the observations of $C-H$ out-of-plane bend modes and the weak outliers on the blue side of the intense 11.2 $μm$ band is proposed. The models provide pointers to possible PAH populations in different regions.
description: accepted for publication in A&A
Single electron manipulation in silicon nanowires for quantum technologies
Creators: name: Li, Zuo
Publisher: name: University of Southampton
Year: 2018
Subjects: Electronics and Computer Science
Smart Electronic Materials and Systems

description: A redenition of the Ampere based on the quantum metrology triangle is required to improve the accuracy of the unit. The Si single electron pump is considered a promising candidate for the single electron source in the quantum metrology triangle due to its compatibility with the state-of-art CMOS manufacturing platform. However, the fabrication processes have not been fully established, and the performance impact factors and reliability of Si single electron pumps have not been fully addressed.

In this project, I successfully fabricated Si electron pumps with atomically at surfaces, using the advanced facilities in Southampton Nanofabrication Centre. I observed current plateaus with the width of 18 meV and uncertainty of 0.828% when the single electron pump is operated at 125 MHz in the National Physical Laboratory, showing the possibilities for the applications of current calibration. The reliability issues were investigated by measuring Si quantum dot devices and the single electron pumps fabricated. The impact of charge traps in quantum devices were addressed by investigating the random telegraph noise in the devices. I demonstrated that the charge traps can impact the device reliability by resonant tunnelling, which will help scientists to understand further about the reliability impact factors of silicon quantum devices.
title: Derivation of Analytical, Closed‐form Formulas for the Calculations of Instantaneous Screw Axes of Arbitrary Rigid 3D Multi‐Body Systems
Creators: name: Boungard, Jonas
name: Wackerfuß, Jens
Publisher: name: Universität Kassel
Year: 2021
Subjects: subject: 510
subject: 620
subject: Mehrkörpersystem
subject: Kinematik

description: Gefördert im Rahmen des Projekts DEAL
title: The German newspaper in its first years of existence
Creators: name: Hillgaertner, Jan
Publisher: name: University of St Andrews
Year: 2020

description: This thesis traces the birth and spread of the newspaper in the Holy Roman Empire in the first half of the seventeenth century. It examines the emergence of the new form of communication between 1605, the year that Johann Carolus of Strasbourg published the first newspapers and 1650, when publishing periodical news had become firmly embedded in the European information world. The eventual success of the newspaper as the foremost purveyor of news was not foreordained. The newspapers made their way in an established news market, and drew their coverage from many of the established European news hubs, Vienna, Cologne, Amsterdam, Paris, Venice and Rome. As with the invention of printing, the fundamental problems connected with the first age of newspaper publishing were essentially economic: start-up capital, distribution, collecting subscriptions. Periodicity also introduced special challenges not familiar in the wider book world, such as the need for a steady supply of news, and the ethics of reporting. Formulating a set of rules and ethics that could govern all forms of reporting proved to be problematic. Newspaper in Germany ostentatiously avoided the bias and propagandistic rhetoric of established forms of news distribution, such as broadsheets and pamphlets. But this in turn meant that the absence of context and background made the purely factual reports favoured by the newspaper difficult for relatively inexperienced readers to understand. In the first part of this dissertation, based on the inspection and analysis of some 8,000 surviving issues, two chapters explore the emerging world of German newspapers, the distribution of new titles and their longevity. The second chapter refines our picture of the German news world, based on a detailed analysis of the places from which news was received, the ‘places of correspondence’. Two further chapters contextualise this broader treatment through an examination of the news reporting of two major events: the death of the Swedish king Gustavus Adolphus at the Battle of Lützen, and the execution of King Charles I of England in 1649. These case studies also provide the opportunity for a sustained comparison with the emerging newspaper markets of other parts of Europe, and with the provision of news through manuscript newsletters, still the gold standard for accuracy and reliability even in the age of printed news.
Soft gluons in Higgs plus two jet production
Creators: name: Forshaw, Jeff
name: Sjodahl, Malin
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate the effects of an all order QCD resummation of soft gluon emissions for Higgs boson production in association with two hard jets. We consider both the gluon-gluon fusion and weak boson fusion processes and show how to resum a large part of the leading logarithms in the jet veto scale. Our resummation improves on previous analyses which also aim to include the effects of multiple soft gluon radiation. In addition we calculate the interference between weak boson fusion and gluon-gluon fusion and find that it is small.
description: 15 pages and 5 figures
DITOs Fact finding and review collection of CS guidelines and publications
Creators: name: ECSA
Publisher: name: Zenodo
Year: 2019
Subjects: citizen science

description: This is an initial collection of papers and guidelines related to Citizen Science. It was created to inform the first phase of the DITOs project. The collection is accessible via the ECSA website: https://ecsa.citizen-science.net/blog/collection-citizen-science-guidelines-and-publications
Magnetic field amplification by a nonlinear electron streaming instability
Creators: name: Peterson, J. R.
name: Glenzer, S.
name: Fiuza, F.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Magnetic field amplification by relativistic streaming plasma instabilities is central to a wide variety of high-energy astrophysical environments as well as to laboratory scenarios associated with intense lasers and electron beams. We report on a new secondary nonlinear instability which arises for relativistic dilute electron beams after the saturation of the linear Weibel instability. This instability grows due to the transverse magnetic pressure associated with the beam current filaments, which cannot be quickly neutralized due to the inertia of background ions. We show that it can amplify the magnetic field strength and spatial scale by orders of magnitude, leading to large-scale plasma cavities with strong magnetic field and to very efficient conversion of the beam kinetic energy into magnetic energy. The instability growth rate, saturation level, and scale length are derived analytically and shown to be in good agreement with fully-kinetic simulations.
description: 6 pages, 4 figures, submitted to Physical Review Letters
Open Access Basics - How to publish and What to Consider?
Creators: name: Rücknagel, Jessika
name: Schmeja, Stefan
Publisher: name: Zenodo
Year: 2021
Subjects: open access

description: More and more funders and institutions expect their researchers to publish research results open access. Furthermore, publishing open access increases the visibility of publications. But how can you make publications ideally accessible to the community? The presentation will address this and further questions such as: Which publication models exists? Which ones are suitable for me? Where can I publish according to open access? How do I find a suitable journal? What are the most common requirements of research funders? The talk was given as part of the Open Access Talk series on January, 28 2021.
LA "CRONICHA" DI DOMENICO BORDIGALLO
Creators: name: Beneggi, Andrea
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2011

description: EDIZIONE ED INQUADRAMENTO STORICO DELLA "CRONICHA", NON ANCORA EDITA, DEL CREMONESE DOMENICO BORDIGALLO (1449 - 1527). SI TRATTA DI UNA CRONACA UNIVERSALE DALLA CREAZIONE DEL MONDO ALLA MORTE DELL'AUTORE, SCRITTA IN LATINO. L'OPERA (417 CARTE, RECTO E VERSO) E' PARTICOLARMENTE SIGNIFICATIVA PER LA RICOSTRUZIONE DELLE VICENDE DELLA CITTA' DI CREMONA E DEL DUCATO DI MILANO.
Maximal Acceleration, Reciprocity & Nonlocality
Creators: name: Buoninfante, Luca
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The existence of a fundamental scale is expected to be a key feature of quantum gravity. Many approaches take this property as a starting assumption. Here, instead, we take a less conventional viewpoint based on a critical inspection of both fundamental principles and kinematic laws. We point out that rigorous arguments suggest a more urgent need to revise known theories to incorporate a fundamental acceleration scale already in flat space. The reciprocity principle can naturally do so. In addition to noticing links with string theory, we argue that the reciprocity principle implies an infinite-derivative generalization of the Einstein-Hilbert action that makes the gravitational interaction fundamentally nonlocal, thus providing a guiding principle that could lead us towards the formulation of a consistent theory of quantum gravity.
description: 4 pages, 1 figure. Essay received an Honorable Mention in the 2021 Gravity Research Foundation Essays Competition
Il Museo luogo della Comunicazione
Creators: name: Iadicicco, Francesca
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2011

description: Il museo è un oggetto di studio di grande interesse per la sfera semiotica, un luogo che non solo è deputato alla memoria e alla trasmissione culturale in tutti i suoi aspetti, ma, grazie anche all’affermarsi di nuove tecnologie nel campo dell’informazione e della comunicazione, alla trasmissione di significati. Nella misura in cui assolve una funzione comunicativa, il museo rappresenta un medium per la percezione e per l’esperimento della realtà. Tale comunicazione avviene mediante il contenitore ed il contenuto. Percorsa una panoramica dell'architettura museale, sono state  individuate tre tipologie che si ritengono significative per analizzare le diverse modalità comunicative a cui corrispondono tre casi studio: il museo/contenitore del Jewish Museum di Libeskind, il museo/contenitore Maxxi di Zaha Hadid ed il museo/contenuto.
Forschungsdaten & Open Access - so publizieren Sie Ihre Daten
Creators: name: Ziedorn, Frauke
Publisher: name: Zenodo
Year: 2021
Subjects: open access
Datenmanagement

description: Open Data ist eine wichtige Säule der Open-Science-Bewegung, die die Wissenschaftskommunikation bewegt. Im Vortrag gibt die Referentin Tipps und Tricks wie Forschungsdaten der Community offen bereit gestellt werden können. Dabei stehen folgende Fragen im Vordergrund: Wie wählen Sie interessante Forschungsdaten für die Veröffentlichung? An was müssen Sie denken, wenn Sie Forschungsdaten publizieren? Wie und wo können Forschungsdaten veröffentlicht werden? Der Vortrag wurde im Open Access Talk Special anlässlich der Love Data Week am 09. Februar 2021 gehalten.
Analysis, Prediction, and Control of Epidemics: A Survey from Scalar to Dynamic Network Models
Creators: name: Zino, Lorenzo
name: Cao, Ming
Publisher: name: arXiv
Year: 2021
Subjects: subject: Dynamical Systems (math.DS)
subject: Social and Information Networks (cs.SI)
subject: Systems and Control (eess.SY)
subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: During the ongoing COVID-19 pandemic, mathematical models of epidemic spreading have emerged as powerful tools to produce valuable predictions of the evolution of the pandemic, helping public health authorities decide which intervention policies should be implemented. The study of these models -- grounded in the systems theory and often analyzed using control-theoretic tools -- is an extremely important research area for many researchers from different fields, including epidemiology, engineering, physics, mathematics, computer science, sociology, economics, and management. In this survey, we review the history and present the state of the art in the modeling, analysis, and control of epidemic dynamics. We discuss different approaches to epidemic modeling, either deterministic or stochastic, ranging from the first implementations of scalar systems of differential equations to describing the epidemic spreading at the population level, and to more recent models on dynamic networks, which capture the spatial spread and the time-varying nature of human interactions.
description: 38 pages, 11 figures. Accepted for publication in the IEEE Circuits and Systems Magazine (\c{opyright} 2021 IEEE)
The Variable X-ray Spectrum of Markarian 766 - II. Time-Resolved Spectroscopy
Creators: name: Turner, T. J.
name: Miller, L.
name: Reeves, J. N.
name: Kraemer, S. B.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: CONTEXT: The variable X-ray spectra of AGN systematically show steep power-law high states and hard-spectrum low states. The hard low state has previously been found to be a component with only weak variability. The origin of this component and the relative importance of effects such as absorption and relativistic blurring are currently not clear. AIMS: In a follow-up of previous principal components analysis, we aim to determine the relative importance of scattering and absorption effects on the time-varying X-ray spectrum of the narrow-line Seyfert 1 galaxy Mrk~766. METHODS: Time-resolved spectroscopy, slicing XMM and Suzaku data down to 25 ks elements, is used to investigate whether absorption or scattering components dominate the spectral variations in Mrk 766.Time-resolved spectroscopy confirms that spectral variability in Mrk 766 can be explained by either of two interpretations of principal components analysis. Detailed investigation confirm rapid changes in the relative strengths of scattered and direct emission or rapid changes in absorber covering fraction provide good explanations of most of the spectral variability. However, a strong correlation between the 6.97 keV absorption line and the primary continuum together with rapid opacity changes show that variations in a complex and multi-layered absorber, most likely a disk wind, are the dominant source of spectral variability in Mrk 766
Cosmological radiation density with non-standard neutrino-electron interactions
Creators: name: de Salas, Pablo F.
name: Gariazzo, Stefano
name: Martínez-Miravé, Pablo
name: Pastor, Sergio
name: Tórtola, Mariam
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Neutrino non-standard interactions (NSI) with electrons are known to alter the picture of neutrino decoupling from the cosmic plasma. NSI modify both flavour oscillations through matter effects, and the annihilation and scattering between neutrinos and electrons and positrons in the thermal plasma. In view of the forthcoming cosmological observations, we perform a precision study of the impact of non-universal and flavour-changing NSI on the effective number of neutrinos, $N_{eff}$. We present the variation of $N_{eff}$ arising from the different NSI parameters and discuss the existing degeneracies among them, from cosmology alone and in relation to the current bounds from terrestrial experiments. Even though cosmology is generally less sensitive to NSI than these experiments, we find that future cosmological data would provide competitive and complementary constraints for some of the couplings and their combinations.
description: 11 pages, 5 figures, 1 table
Aspetti morfologici ed elettrofunzionali nel follow-up della degenerazione maculare legata all'età in forma atrofica
Creators: name: Ambrosio, Lucia
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2013

description: La degenerazione maculare legata all'età è la prima causa di cecità legale nei paesi industrializzati dopo i 60 anni di età. Lo scopo di questo studio è valutare la funzionalità retinica maculare in pazienti affetti da degenerazione maculare legata all'età in stadio precoce correlando i dati funzionali al decadimento del visus nel tempo ed alle alterazioni morfologiche a carico dei fotorecettori.
Superconducting fluctuations in small grains - the Universal Hamiltonian and the reduced BCS model
Creators: name: Schechter, Moshe
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Small superconducting grains are discussed in the frameworks of both the reduced BCS Hamiltonian and the Universal Hamiltonian. It is shown that fluctuations of electrons in levels far from the Fermi energy dominate superconducting properties in small and ultrasmall grains. Experimental consequences related to the spin susceptibility and persistent currents of grains and rings with weak electron-electron interactions are discussed.
description: Contribution to the proceedings of "Fluctuations and phase transitions in superconductors", Nazareth Ilit, Israel, June 10-14, 2007
Sviluppo di un metodo in LCMSTOF per l’analisi di palitossine in colture algali e mitili raccolti lungo le coste campane.
Creators: name: Castellano, Vincenzo
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2013

description: In questi ultimi anni il rischio di contaminazione degli alimenti di origine marina da parte di biotossine algali è di estrema attualità, anche in considerazione del fatto della presenza sui nostri mercati di alimenti spesso provenienti da altre parti del globo, che possono comportare un rischio sanitario non sempre di facile valutazione. Il rischio di contaminazione degli alimenti da parte di biotossine algali di diversa natura prodotte da alcune specie fitoplanctoniche o fitobentoniche è ancor di più di attualità in considerazione dei cambiamenti climatici che possono favorire la diffusione di specie tossiche, come è stato ipotizzato nel caso delle fioriture di Ostreopsis, un problema emergente lungo le coste italiane dove negli ultimi anni vengono riportate con sempre maggiore frequenza nel corso della stagione estiva. Ostreopsis è un genere di dinoflagellato bentonico che nei mari italiani è rappresentato da almeno due specie diverse, O. ovata e O. cf. siamensis, entrambe capaci di produrre una tossina simile alla palitossina, una delle più potenti tossine ad oggi conosciute. Lungo le coste campane non sono state notate negli anni passati fioriture di rilievo di Ostreopsis cf. ovata, sebbene la presenza della specie sia segnalata da alcuni anni, in associazione con altre microalghe bentoniche produttrici di tossine di tipo diverso (Acido okadaico, dinophitossine). Era pertanto necessario avere a disposizione metodiche di analisi sensibili ed efficaci, che permettessero il rilevamento di quantità anche minime di tossina, per poter gestire prontamente situazioni che potevano preludere a casi di contaminazione da biotossine in alimenti di origine marina o comunque in specie animali presenti nella fascia costiera, possibili vettori di palitossine I test biologici come previsto dal Decreto Ministeriale del 16 maggio 2002, hanno il vantaggio di identificare effetti tossici dovuti alla presenza di eventuali tossine, non note o non attese, difficilmente identificabili con analisi chimiche. Il test biologico a cui si fa riferimento nel suddetto decreto è il test sul topo, che ha però una sensibilità piuttosto bassa, una riproducibilità limitata (LeDoux e Hall, 2001) e negli ultimi tempi è stato ampiamente criticato per problemi di natura etica  Il nostro obiettivo principale è stato dunque quello di sviluppare metodi idonei per l’identificazione di tossine prodotte da microalghe del genere Ostreopsis in prodotti alimentari di origine marina che potrebbero rappresentare un rischio per la salute umana. Pertanto sono state condotte analisi su molluschi, crostacei e pesci bentonici o strettamente costieri che, nutrendosi di Ostreopsis o delle macroalghe sulle quali questa microalga prolifera, avrebbero potuto veicolare la palitossina.
Multi-dimensional numerical simulations of type Ia supernova explosions
Creators: name: Roepke, F. K.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The major role type Ia supernovae play in many fields of astrophysics and in particular in cosmological distance determinations calls for self-consistent models of these events. Since their mechanism is believed to crucially depend on phenomena that are inherently three-dimensional, self-consistent numerical models of type Ia supernovae must be multi-dimensional. This field has recently seen a rapid development, which is reviewed in this article. The different modeling approaches are discussed and as an illustration a particular explosion model -- the deflagration model -- in a specific numerical implementation is presented in greater detail. On this exemplary case, the procedure of validating the model on the basis of comparison with observations is discussed as well as its application to study questions arising from type Ia supernova cosmology.
description: 30 pages, 7 figures (Fig. 6 with reduced resolution)
Beyond Food Community Networks: organizational elements, participation  and alternative models of consumption
Creators: name: Lombardi, Alessia
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2013

description: Alternative Food Chains (AFCs) are a new model of food production and distribution developed worldwide. The aim of AFCs is to become a suitable alternative to mainstream models and, at the same time, it aims at representing an opportunity to recreate a place where community participants can share and develop values and attitudes. It also provides a place for experimenting new organizational models with a high involvement of the different stakeholders. A specific organizational model heavily relying on high involvement of different stakeholders has been recently defined as Food Community Networks (FCNs). FCNs include Community Supported Agriculture (CSA), Solidarity Purchase Group (SPG), Farmers’ Market (FM) and Associations pour le Maintien d’une Agriculture Paysanne (AMAP). All those organizations are similar but present differences in the way they are organized. The distinctive trait of FCNs is the creation of a community dimension where consumers and producers share scarce and valuable resources such as information, time and capital. The general objective of this study is to implement a complete research of FCN. The research has the scope to generate knowledge both in terms of organizational structure and from consumers’ point of view. If organizational elements of FCNs could be better understood, then they can be used to better design interventions to sustain local farms and communities, niche products and eventually support innovative entrepreneurial attitudes. The results illustrate the organizational structure of FCNs in terms of New Institutional Economics and Organizational Science. Moreover, we deeply investigated the participation of consumers and it has been possible to draw the identikit of a FCN participant in terms of his/her personal values, attitudes and the importance of transaction cost.
Burst-Error Propagation Suppression for Decision-Feedback Equalizer in Field-Trial Submarine Fiber-Optic Communications
Creators: name: Zhou, Ji
name: Yang, Chengkun
name: Wang, Dawei
name: Sui, Qi
name: Wang, Haide
name: Gao, Shecheng
name: Feng, Yuanhua
name: Liu, Weiping
name: Yan, Yuelin
name: Li, Jianping
name: Yu, Changyuan
name: Li, Zhaohui
Publisher: name: arXiv
Year: 2021
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: In this paper, we present a field-trial C-band 72Gbit/s optical on-off keying (OOK) system over 18.8km dispersion-uncompensated submarine optical cable in the South China Sea. Chromatic dispersion (CD) of 18.8km submarine optical cable causes four spectral nulls on the 36GHz bandwidth of 72Gbit/s OOK signal, which is the main obstacle for achieving an acceptable bit-error-rate (BER) performance. Decision feedback equalizer (DFE) is effective to compensate for the spectral nulls. However, DFE has a serious defect of burst-error propagation when the burst errors emerge due to the unstable submarine environment. Weighted DFE (WDFE) can be used to mitigate the burst-error propagation, but it cannot fully compensate for the spectral nulls because only a part of feedback symbols is directly decided. Fortunately, maximum likelihood sequence estimation (MLSE) can be added after the WDFE to simultaneously eliminate the resisting spectral distortions and implement optimal detection. Compared to the joint DFE and MLSE algorithm, the joint WDFE and MLSE algorithm can effectively suppress the burst-error propagation to obtain a maximum 2.9dB improvement of $\boldsymbol{Q}$ factor and eliminate the phenomenon of BER floor. In conclusion, the joint WDFE and MLSE algorithm can solve the burst-error propagation for the field-trial fiber-optic communications.
description: Under review of Journal of Lightwave Techonlogy
Reply to "Comment on `Minimal size of a barchan dune' "
Creators: name: Parteli, E. J. R.
name: Durán, O.
name: Herrmann, H. J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We reply to the comment by Andreotti and Claudin (submitted to Phys. Rev. E, arXiv:0705.3525) on our paper ``Minimal Size of a Barchan Dune'' [Phys. Rev. E {\bf{75,}} 011301 (2007)]. We show that the equations of the dune model used in our calculations are self-consistent and effectively lead to a dependence of the minimal dune size on the wind speed through the saturation length. Furthermore, we show that Meridiani Planum ripples are probably not a good reference to estimate the grain size of Martian dune sands: the soil in the ripple troughs at the landing site is covered with nonerodible elements (``blueberries''), which increase the minimal threshold for saltation by a factor of 2.0. We conclude that, in the absence of large fragments as the ones found at the landing site, basaltic grains of diameter $d=500 \pm 100 μ$m that compose the large, typical dark Martian dunes [K. S. Edgett and P. R. Christensen, J. Geophys. Res. {\bf{96,}} 22765 (1991)] probably saltate during the strongest storms on Mars. We also show that the wind friction speed $u_{\ast} \approx 3.0$ m/s that we found from the calculations of Martian dunes is within the values of maximum wind speeds that occur during Martian storms a few times a decade [R. E. Arvidson {\em{et al.}}, Science {\bf{222,}} 463 (1983); H. J. Moore, J. Geophys. Res. {\bf{90,}} 163 (1985); R. Sullivan {\em{et al.}}, Nature {\bf{436,}} 58 (2005); D. J. Jerolmack {\em{et al.}}, J. Geophys. Res. {\bf{111,}} E12S02 (2006)]. In this manner, the dune model predicts that Martian dunes can be formed under present Martian conditions, with no need to assume other conditions of wind and atmosphere that could have prevailed in the past.
description: 6 pages and 2 figures. Submitted to Physical Review E
Predicting synchronized gene coexpression patterns from fibration symmetries in gene regulatory networks in bacteria
Creators: name: Leifer, Ian
name: Sánchez-Pérez, Mishael
name: Ishida, Cecilia
name: Makse, Hernán A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Molecular Networks (q-bio.MN)
subject: Biological Physics (physics.bio-ph)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Genomics (q-bio.GN)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: Background: Gene regulatory networks coordinate the expression of genes across physiological states and ensure a synchronized expression of genes in cellular subsystems, critical for the coherent functioning of cells. Here we address the questions whether it is possible to predict gene synchronization from network structure alone. We have recently shown that synchronized gene expression may be predicted from symmetries in the gene regulatory networks (GRN) and described by the concept of symmetry fibrations. We showed that symmetry fibrations partition the genes into groups called fibers based on the symmetries of their 'input trees', the set of paths in the network through which signals can reach a gene. In idealized dynamic gene expression models, all genes in a fiber are perfectly synchronized, while less idealized models - with gene input functions differencing between genes - predict symmetry breaking and desynchronization. Results: To study the functional role of gene fibers and to test whether some of the fiber-induced coexpression remains in reality, we analyze gene fibrations for the gene regulatory networks of E. coli and B. subtilis and confront them with expression data. We find approximate gene coexpression patterns consistent with symmetry fibrations with idealized gene expression dynamics. This shows that network structure alone provides useful information about gene synchronization, and suggest that gene input functions within fibers may be further streamlined by evolutionary pressures to realize a coexpression of genes. Conclusions: Thus, gene fibrations provides a sound conceptual tool to describe tunable coexpression induced by network topology and shaped by mechanistic details of gene expression.
Active Learning for Massively Parallel Translation of Constrained Text into Low Resource Languages
Creators: name: Zhou, Zhong
name: Waibel, Alex
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: We translate a closed text that is known in advance and available in many languages into a new and severely low resource language. Most human translation efforts adopt a portion-based approach to translate consecutive pages/chapters in order, which may not suit machine translation. We compare the portion-based approach that optimizes coherence of the text locally with the random sampling approach that increases coverage of the text globally. Our results show that the random sampling approach performs better. When training on a seed corpus of ~1,000 lines from the Bible and testing on the rest of the Bible (~30,000 lines), random sampling gives a performance gain of +11.0 BLEU using English as a simulated low resource language, and +4.9 BLEU using Eastern Pokomchi, a Mayan language. Furthermore, we compare three ways of updating machine translation models with increasing amount of human post-edited data through iterations. We find that adding newly post-edited data to training after vocabulary update without self-supervision performs the best. We propose an algorithm for human and machine to work together seamlessly to translate a closed text into a severely low resource language.
Evanescent states in quantum wires with Rashba spin-orbit coupling
Creators: name: Serra, Llorens
name: Sanchez, David
name: Lopez, Rosa
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We discuss the calculation of evanescent states in quasi-one-dimensional quantum wires in the presence of Rashba spin-orbit interaction. We suggest a computational algorithm devised for cases in which longitudinal and transverse motions are coupled. The dispersion relations are given for some selected cases, illustrating the feasibility of the proposed computational method. As a practical application, we discuss the solutions for a wire containing a potential step.
description: 8 pages, 8 figures
Supplement S1.pdf
Creators: name: Pappelis, Konstantinos
name: Choritz, Lars
name: Nomdo M. Jansonius
Publisher: name: figshare
Year: 2020
Subjects: subject: 111301 Ophthalmology
subject: FOS: Clinical medicine
subject: Physiology
subject: FOS: Biological sciences
subject: 10202 Biological Mathematics
subject: FOS: Mathematics

description: This file is supplementary material to:
Pappelis K, Choritz L, Jansonius NM. Microcirculatory model predicts blood flow and autoregulation range in the human retina: in vivo investigation with Laser Speckle Flowgraphy. Am J Physiol Heart Circ Physiol. 2020 Dec 1;319(6):H1253-1273
La liberación en América Latina entre teologìa y filosofìa
Creators: name: Rodríguez López, Leticia
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2013

description: Este trabajo es un análisis de la categoría de libertad en el contexto del pensamiento latinoamericano de la teología y filosofía de la liberación. De manera específica actualiza el conocimiento desde la realidad mexicana a través de un recorrido por los principales ámbitos de la teología y filosofía de la liberación. También establece como propuesta el vínculo entre la libertad y el proyecto de vida plena para la humanidad desde la vulnerabilidad
Excited states of a string in a time dependent orbifold
Creators: name: Malkiewicz, Przemyslaw
name: Piechocki, Wlodzimierz
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We present analytical results on the propagation of a classical string in non-zero modes through the singularity of the compactified Milne space. We restrict our analysis to a string winding around the compact dimension of spacetime. The compact dimension undergoes contraction to a point followed by re-expansion. We demonstrate that the classical dynamics of the string in excited states is non-singular in the entire spacetime.
description: Version accepted for publication in Class. Quantum Grav
Identification of genes regulated by CBX7 protein and characterization of the transcriptional regulation mechanism of the SPP1 gene
Creators: name: Sepe, Romina
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2013

description: CBX7 is a member of the Polycomb Repressive Complex 1 (PRC1) involved in the process of human and mouse tumorigenesis. Recently, we have demonstrated that CBX7 is drastically decreased in several human carcinomas and that CBX7 protein levels progressively decreased in relation with the malignant grade and the neoplastic stage. To characterize the mechanisms by which the loss of CBX7 contributes to the process of carcinogenesis, we analyzed the gene expression profiling of an anaplastic thyroid carcinoma cell line in which the expression of CBX7 was restored and found that CBX7 was able to negatively or positively regulate the expression of several genes (such as SPP1, SPINK1, STEAP1, and FOS, FOSB, EGR1, respectively) associated with cancer progression. By quantitative (q)RT-PCR, we confirmed these data in mouse and rat system in which the expression of Cbx7 was silenced. Then, we showed that CBX7 was able to physically interact with the promoter region of these genes, thus regulating their activity. qRT-PCR analysis performed on thyroid and lung carcinoma samples with different degree of malignancy, showed a negative correlation between CBX7 and its down-regulated genes, while a positive correlation was observed between CBX7 and its up-regulated genes. Recently, we have demonstrated that CBX7 protein is able to interact with the High Mobility Group A 1 (HMGA1) protein. Therefore, we asked whether this interaction could be involved in the transcriptional regulation of the SPP1 gene.qRT-PCR analysis demonstrated that HMGA1 protein is able to increase the SPP1 expression in several cellular systems. Moreover, by chromatin immunoprecipitation assays, we found that HMGA1 binds together with CBX7 protein to the SPP1 promoter and that the two proteins compete for the binding. Finally, functional assays showed that CBX7 is able to negatively regulate cellular migration by repressing transcriptional activation of the SPP1promoter.
In conclusion, the loss of CBX7 expression might play a critical role in cancer progression by deregulating the expression of specific effector genes.
Super-resolution-based Change Detection Network with Stacked Attention Module for Images with Different Resolutions
Creators: name: Liu, Mengxi
name: Shi, Qian
name: Marinoni, Andrea
name: He, Da
name: Liu, Xiaoping
name: Zhang, Liangpei
Publisher: name: arXiv
Year: 2021
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Change detection, which aims to distinguish surface changes based on bi-temporal images, plays a vital role in ecological protection and urban planning. Since high resolution (HR) images cannot be typically acquired continuously over time, bi-temporal images with different resolutions are often adopted for change detection in practical applications. Traditional subpixel-based methods for change detection using images with different resolutions may lead to substantial error accumulation when HR images are employed; this is because of intraclass heterogeneity and interclass similarity. Therefore, it is necessary to develop a novel method for change detection using images with different resolutions, that is more suitable for HR images. To this end, we propose a super-resolution-based change detection network (SRCDNet) with a stacked attention module. The SRCDNet employs a super resolution (SR) module containing a generator and a discriminator to directly learn SR images through adversarial learning and overcome the resolution difference between bi-temporal images. To enhance the useful information in multi-scale features, a stacked attention module consisting of five convolutional block attention modules (CBAMs) is integrated to the feature extractor. The final change map is obtained through a metric learning-based change decision module, wherein a distance map between bi-temporal features is calculated. The experimental results demonstrate the superiority of the proposed method, which not only outperforms all baselines -with the highest F1 scores of 87.40% on the building change detection dataset and 92.94% on the change detection dataset -but also obtains the best accuracies on experiments performed with images having a 4x and 8x resolution difference. The source code of SRCDNet will be available at https://github.com/liumency/SRCDNet.