cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Effetto del trattamento con campi elettrici pulsati e della salagione sulla funzionalita' proteica di filetti di branzino
Creators: name: Zavalloni, Marco
Publisher: name: Zenodo
Year: 2022

description: Abstract
 Il presente lavoro di tesi ha avuto lo scopo di valutare gli effetti di un trattamento combinato con campi elettrici pulsati (PEF) e salamoia sulla funzionalità proteica e sul colore di filetti di branzini (Dicentrarchus labrax) alimentati con due diete diversificate per l’allevamento biologico. Dai filetti provenienti da due batch, uno per dieta, sono stati ottenuti 80 campioni (n=40/dieta). La metà dei campioni (n=20) è stata sottoposta ad un pretrattamento con PEF, mentre la metà restante non ha subito alcun trattamento. Di questi venti, dieci sono stati immersi in una salamoia (10% di NaCl, con un rapporto filetti-salamoia di 1:10), mentre i rimanenti sono stati analizzati tal quali. Sui filetti (n=10/gruppo) sono stati successivamente eseguite le determinazioni di colore, drip loss e solubilità delle proteine. Dall’esame dei risultati ottenuti è emerso che, per tutti i parametri considerati, le differenze riscontrate tra i campioni derivanti da branzini alimentati con dieta standard e dieta innovativa sono state trascurabili. A differenza di precedenti studi effettuati su matrici ittiche e carnee, il trattamento con PEF non ha fatto registrare miglioramenti significativi in termini di funzionalità proteica del tessuto muscolare. Per quanto concerne l’effetto della salagione, seppur i dati relativi alla solubilità delle proteine avrebbero potuto far presupporre una riduzione della loro funzionalità dovuta ad un eccessivo contenuto di sale (effetto “salting out”), i risultati riguardanti il parametro del drip loss hanno evidenziato un’incrementata capacità di ritenzione idrica dei campioni di branzino sottoposti a salagione, se paragonati alla loro controparte non salata. La salagione ha inoltre modificato significativamente anche i parametri colorimetrici: i filetti salati hanno infatti evidenziato un notevole aumento dei parametri di saturazione e tinta.
Cosmology from an AdS Schwarzschild black hole via holography
Creators: name: Apostolopoulos, Pantelis S.
name: Siopsis, George
name: Tetradis, Nikolaos
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We derive the equations of cosmological evolution from an AdS Schwarzschild black hole via holographic renormalization with appropriate boundary conditions.
description: 6 pages
Effetto del trattamento con campi elettrici pulsati e della salagione sulla funzionalita' proteica di filetti di branzino
Creators: name: Zavalloni, Marco
Publisher: name: Zenodo
Year: 2022

description: Abstract
Il presente lavoro di tesi ha avuto lo scopo di valutare gli effetti di un trattamento combinato con campi elettrici pulsati (PEF) e salamoia sulla funzionalità proteica e sul colore di filetti di branzini (Dicentrarchus labrax) alimentati con due diete diversificate per l’allevamento biologico. Dai filetti provenienti da due batch, uno per dieta, sono stati ottenuti 80 campioni (n=40/dieta). La metà dei campioni (n=20) è stata sottoposta ad un pretrattamento con PEF, mentre la metà restante non ha subito alcun trattamento. Di questi venti, dieci sono stati immersi in una salamoia (10% di NaCl, con un rapporto filetti-salamoia di 1:10), mentre i rimanenti sono stati analizzati tal quali. Sui filetti (n=10/gruppo) sono stati successivamente eseguite le determinazioni di colore, drip loss e solubilità delle proteine. Dall’esame dei risultati ottenuti è emerso che, per tutti i parametri considerati, le differenze riscontrate tra i campioni derivanti da branzini alimentati con dieta standard e dieta innovativa sono state trascurabili. A differenza di precedenti studi effettuati su matrici ittiche e carnee, il trattamento con PEF non ha fatto registrare miglioramenti significativi in termini di funzionalità proteica del tessuto muscolare. Per quanto concerne l’effetto della salagione, seppur i dati relativi alla solubilità delle proteine avrebbero potuto far presupporre una riduzione della loro funzionalità dovuta ad un eccessivo contenuto di sale (effetto “salting out”), i risultati riguardanti il parametro del drip loss hanno evidenziato un’incrementata capacità di ritenzione idrica dei campioni di branzino sottoposti a salagione, se paragonati alla loro controparte non salata. La salagione ha inoltre modificato significativamente anche i parametri colorimetrici: i filetti salati hanno infatti evidenziato un notevole aumento dei parametri di saturazione e tinta.
Editoriale
Creators: name: (A Cura Di), Ana María González Luna
name: (A Cura Di), Laura Scarabelli
Publisher: name: Università degli  Studi di Milano
Year: 2014

description: Editoriale
Numero speciale –Migrazioni, diaspora, esilio nelle letterature e culture ispanoamericane

a cura di Ana María González Luna e Laura Scarabelli
description: Altre Modernità, 2014: NUMERO SPECIALE Migrazioni, diaspora, esilio nelle letterature e culture ispanoamericane
Micromotion minimization using Ramsey interferometry
Creators: name: Higgins, Gerard
name: Salim, Shalina
name: Zhang, Chi
name: Parke, Harry
name: Pokorny, Fabian
name: Hennrich, Markus
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We minimize the stray electric field in a linear Paul trap quickly and accurately, by applying interferometry pulse sequences to a trapped ion optical qubit. The interferometry sequences are sensitive to the change of ion equilibrium position when the trap stiffness is changed, and we use this to determine the stray electric field. The simplest pulse sequence is a two-pulse Ramsey sequence, and longer sequences with multiple pulses offer a higher precision. The methods allow the stray field strength to be minimized beyond state-of-the-art levels, with only modest experimental requirements. Using a sequence of nine pulses we reduce the 2D stray field strength to $(10.5\pm0.8)\,\mathrm{mV\,m^{-1}}$ in $11\,\mathrm{s}$ measurement time. The pulse sequences are easy to implement and automate, and they are robust against laser detuning and pulse area errors. We use interferometry sequences with different lengths and precisions to measure the stray field with an uncertainty below the standard quantum limit. This marks a real-world case in which quantum metrology offers a significant enhancement. Also, we minimize micromotion in 2D using a single probe laser, by using an interferometry method together with the resolved sideband method; this is useful for experiments with restricted optical access. Furthermore, a technique presented in this work is related to quantum protocols for synchronising clocks; we demonstrate these protocols here.
description: Main text: 14 pages, 18 figures. Appendix: 5 pages, 4 figures
Electromagnetic Form Factors of Hadrons in Quantum Field Theories
Creators: name: Dominguez, C. A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: In this talk, recent results are presented of calculations of electromagnetic form factors of hadrons in the framework of two quantum field theories (QFT), (a) Dual-Large $N_c$ QCD (Dual-$QCD_\infty$) for the pion, proton, and $Δ(1236)$, and (b) the Kroll-Lee-Zumino (KLZ) fully renormalizable Abelian QFT for the pion form factor. Both theories provide a QFT platform to improve on naive (tree-level) Vector Meson Dominance (VMD). Dual-$QCD_\infty$ provides a tree-level improvement by incorporating an infinite number of zero-width resonances, which can be subsequently shifted from the real axis to account for the time-like behaviour of the form factors. The renormalizable KLZ model provides a QFT improvement of VMD in the framework of perturbation theory. Due to the relative mildness of the $ρππ$ coupling, and the size of loop suppression factors, the perturbative expansion is well defined in spite of this being a strong coupling theory. Both approaches lead to considerable improvements of VMD predictions for electromagnetic form factors, in excellent agreement with data.
description: Invited talk at the Sixth International Conference on Perspectives in Hadronic Physics, ICTP, Trieste, Italy, May 2008
MPEC 2024-T02 : 2024 SB6
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2024 SB6

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
A Case Study of Spanish Text Transformations for Twitter Sentiment Analysis
Creators: name: Tellez, Eric S.
name: Miranda-Jiménez, Sabino
name: Graff, Mario
name: Moctezuma, Daniela
name: Siodia, Oscar S.
name: Villaseñor, Elio A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: Sentiment analysis is a text mining task that determines the polarity of a given text, i.e., its positiveness or negativeness. Recently, it has received a lot of attention given the interest in opinion mining in micro-blogging platforms. These new forms of textual expressions present new challenges to analyze text given the use of slang, orthographic and grammatical errors, among others. Along with these challenges, a practical sentiment classifier should be able to handle efficiently large workloads. The aim of this research is to identify which text transformations (lemmatization, stemming, entity removal, among others), tokenizers (e.g., words $n$-grams), and tokens weighting schemes impact the most the accuracy of a classifier (Support Vector Machine) trained on two Spanish corpus. The methodology used is to exhaustively analyze all the combinations of the text transformations and their respective parameters to find out which characteristics the best performing classifiers have in common. Furthermore, among the different text transformations studied, we introduce a novel approach based on the combination of word based $n$-grams and character based $q$-grams. The results show that this novel combination of words and characters produces a classifier that outperforms the traditional word based combination by $11.17\%$ and $5.62\%$ on the INEGI and TASS'15 dataset, respectively.
The Role of Conformal Symmetry in the Jackiw-Pi Model
Creators: name: de Kok, M. O.
name: van Holten, J. W.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The Jackiw-Pi model in 2+1 dimensions is a non-relativistic conformal field theory of charged particles with point-like self-interaction. For specific values of the interaction strengths the classical theory possesses vortex and multi-vortex solutions, which are all degenerate in energy. We compute the full set of first-order perturbative quantum corrections. Only the coupling constant g^2 requires renormalization; the fields and electric charge e are not renormalized. It is shown that in general the conformal symmetries are broken by an anomalous contribution to the conservation law, proportional to the beta-function. However, the beta-function vanishes upon restricting the coupling constants to values g^2 = +/- e^2, which includes the case in which vortex solutions exist. Therefore the existence of vortices also guarantees the preservation of the conformal symmetries.
description: 18 pages, 15 figures
Optimization of emerging treatments for seafood products and by-products valorization
Creators: name: De Aguiar Saldanha Pinheiro, Ana Cristina
Publisher: name: Zenodo
Year: 2022

description: Abstract
 The development of emerging technologies in seafood processing can contribute significantly to meet consumer needs toward safe, healthy, and minimally processed foods. This PhD thesis is focused on the qualitative and quantitative evaluation of the effects of emerging treatments applied to extend shelf-life of seafood processing and to preserve the qualitative characteristics of raw materials. The application of innovative non-thermal technologies to recover bioactive substances from crustacean by-products were also studied. Several experimental procedures were evaluated individually by the following studies: i) study of the effect of modified atmosphere packaging (MAP) with unconventional gas mixtures on the modification of the main qualitative parameters of sardine fillets during refrigerated storage; ii) valorization of an underutilized crustaceans by the application of mechanical flesh separation and freezing iii) application and evaluation of the main effects of high pressure processing (HPP) treatments on the quality and stability of different seafood products; iv) study and application of innovative non-thermal technologies, such as accelerated solvent extraction (ASE) and pulsed electric fields (PEF) for the recovery and valorization of value-added products from crustacean processing by-products. Based on the obtained results, the use of argon for MAP of sardine fillets showed an inhibitory effect on bacterial spoilage increasing their shelf-life. The effect of HPP treatment on the different types of considered seafood products, intended for raw consumption, highlighted a significant microbiological shelf-life increase at the highest applied pressure levels for all the considered species. The application of ASE and PEF showed high yield of astaxanthin and seemed to be an effective tool to recover high antioxidant compounds from crustacean by-products. The overall results of this PhD thesis highlighted the great advantages in the application of emerging technologies for both seafood products and crustacean by-product valorization, therefore contributing to the potential increase of the sustainability of the seafood sector.
Meeting the Cool Neighbors X: Ultracool dwarfs from the 2MASS All-Sky Data Release
Creators: name: Reid, I. Neill
name: Cruz, Kelle L.
name: Kirkpatrick, J. Davy
name: Allen, Peter R.
name: Mungall, F.
name: Liebert, James
name: Lowrance, Patrick
name: Sweet, Anne
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Using data from the 2MASS All-Sky Point Source Catalogue, we have extended our census of nearby ultracool dwarfs to cover the full celestial sphere above Galactic latitute 15 degrees. Starting with an initial catalogue of 2,139,484 sources, we have winnowed the sample to 467 candidate late-type M or L dwarfs within 20 parsecs of the Sun. Fifty-four of those sources already have spectroscopic observations confirming them as late-type dwarfs. We present optical spectroscopy of 376 of the remaining 413 sources, and identify 44 as ultracool dwarfs with spectroscopic distances less than 20 parsecs. Twenty-five of the 37 sources that lack optical data have near-infrared spectroscopy. Combining the present sample with our previous results and data from the literature, we catalogue 94 L dwarf systems within 20 parsecs. We discuss the distribution of activity, as measured by H-alpha emission, in this volume-limited sample. We have coupled the present ultracool catalogue with data for stars in the northern 8-parsec sample and recent (incomplete) statistics for T dwarfs to provide a snapshot of the current 20-parsec census as a function of spectral type.
description: Accepted for publication by the Astronomical Journal
Optimization of emerging treatments for seafood products and by-products valorization
Creators: name: De Aguiar Saldanha Pinheiro,   Ana Cristina
Publisher: name: Zenodo
Year: 2022

description: Abstract
The development of emerging technologies in seafood processing can contribute significantly to meet consumer needs toward safe, healthy, and minimally processed foods. This PhD thesis is focused on the qualitative and quantitative evaluation of the effects of emerging treatments applied to extend shelf-life of seafood processing and to preserve the qualitative characteristics of raw materials. The application of innovative non-thermal technologies to recover bioactive substances from crustacean by-products were also studied. Several experimental procedures were evaluated individually by the following studies: i) study of the effect of modified atmosphere packaging (MAP) with unconventional gas mixtures on the modification of the main qualitative parameters of sardine fillets during refrigerated storage; ii) valorization of an underutilized crustaceans by the application of mechanical flesh separation and freezing iii) application and evaluation of the main effects of high pressure processing (HPP) treatments on the quality and stability of different seafood products; iv) study and application of innovative non-thermal technologies, such as accelerated solvent extraction (ASE) and pulsed electric fields (PEF) for the recovery and valorization of value-added products from crustacean processing by-products. Based on the obtained results, the use of argon for MAP of sardine fillets showed an inhibitory effect on bacterial spoilage increasing their shelf-life. The effect of HPP treatment on the different types of considered seafood products, intended for raw consumption, highlighted a significant microbiological shelf-life increase at the highest applied pressure levels for all the considered species. The application of ASE and PEF showed high yield of astaxanthin and seemed to be an effective tool to recover high antioxidant compounds from crustacean by-products. The overall results of this PhD thesis highlighted the great advantages in the application of emerging technologies for both seafood products and crustacean by-product valorization, therefore contributing to the potential increase of the sustainability of the seafood sector.
Utilizzo di campi elettrici pulsati per aumentare il trasferimento di massa durante la marinatura/salagione di branzino
Creators: name: Zhu, Jing
Publisher: name: Zenodo
Year: 2021

description: Abstract La ricerca di nuovi ingredienti per la formulazione di pesci da allevamento è un importante campo di ricerca in acquacoltura. Tuttavia, è importante verificare le performance tecnologiche dei prodotti ottenuti. I campioni di branzino utilizzati nella presente sperimentazione sono stati allevati con due diete biologiche formulate differentemente, la prima era di tipo tradizionale (commerciale), mentre la seconda era di tipo innovativo. L’obiettivo è stato quello di valutare l’effetto della dieta nella risposta all’applicazione di processi tecnologici quali applicazione di campi elettrici pulsati (PEF) e salamoiatura. Il pretrattamento PEF (0,3 kV/cm, 100 Hz, pulsi di 10 µs) aveva l’obiettivo di aumentare l’efficienza della fase di salamoiatura (immersione in soluzione al 10% di NaCl per 5 giorni). A tal fine sonio state valutate le cinetiche di trasferimento di massa e le principali caratteristiche qualitative dei campioni appartenenti alle due diete. Dai risultati ottenuti è possibile affermare che tra i due prodotti, derivanti da diete diverse, le differenze riscontrate sono state minime, sia in relazione ai parametri misurati sui prodotti freschi, sia in relazione alla risposta ai trattamenti tecnologici effettuati. A differenza di quanto riscontrato in studi precedenti, il PEF non ha migliorato la resa in peso ed acqua dopo salamoiatura, mentre solo nel prodotto innovativo si è verificato un aumento dell’assorbimento di sale, risultato che può indicare qualche differenza nella conformazione delle proteine che abbia facilitato la loro elettroporazione e pertanto la diffusione del sale nel tessuto. Tuttavia, risulta importante sottolineare le discrepanze osservate rispetto alle precedenti sperimentazioni che potrebbero imputarsi alla variabilità della materia prima. Questo aspetto merita un successivo approfondimento, in quanto potrebbe chiarire molte delle discrepanze riportate in letteratura relativamente all’applicazione dei PEF sui tessuti animali.
Review of the Safety of LHC Collisions
Creators: name: Ellis, J.
name: Giudice, G.
name: Mangano, M. L.
name: Tkachev, I.
name: Wiedemann, U.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The safety of collisions at the Large Hadron Collider (LHC) was studied in 2003 by the LHC Safety Study Group, who concluded that they presented no danger. Here we review their 2003 analysis in light of additional experimental results and theoretical understanding, which enable us to confirm, update and extend the conclusions of the LHC Safety Study Group. The LHC reproduces in the laboratory, under controlled conditions, collisions at centre-of-mass energies less than those reached in the atmosphere by some of the cosmic rays that have been bombarding the Earth for billions of years. We recall the rates for the collisions of cosmic rays with the Earth, Sun, neutron stars, white dwarfs and other astronomical bodies at energies higher than the LHC. The stability of astronomical bodies indicates that such collisions cannot be dangerous. Specifically, we study the possible production at the LHC of hypothetical objects such as vacuum bubbles, magnetic monopoles, microscopic black holes and strangelets, and find no associated risks. Any microscopic black holes produced at the LHC are expected to decay by Hawking radiation before they reach the detector walls. If some microscopic black holes were stable, those produced by cosmic rays would be stopped inside the Earth or other astronomical bodies. The stability of astronomical bodies constrains strongly the possible rate of accretion by any such microscopic black holes, so that they present no conceivable danger. In the case of strangelets, the good agreement of measurements of particle production at RHIC with simple thermodynamic models constrains severely the production of strangelets in heavy-ion collisions at the LHC, which also present no danger.
description: This revised version incorporates the "Addendum on strangelets" as Appendix, and updates the bibliography
Shrinking Point Bifurcations of Resonance Tongues for Piecewise-Smooth, Continuous Maps
Creators: name: Simpson, D. J. W.
name: Meiss, J. D.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 37G10

description: Resonance tongues are mode-locking regions of parameter space in which stable periodic solutions occur; they commonly occur, for example, near Neimark-Sacker bifurcations. For piecewise-smooth, continuous maps these tongues typically have a distinctive lens-chain (or sausage) shape in two-parameter bifurcation diagrams. We give a symbolic description of a class of "rotational" periodic solutions that display lens-chain structures for a general $N$-dimensional map. We then unfold the codimension-two, shrinking point bifurcation, where the tongues have zero width. A number of codimension-one bifurcation curves emanate from shrinking points and we determine those that form tongue boundaries.
description: 27 pages, 6 figures
Creating Unbiased Public Benchmark Datasets with Data Leakage Prevention for Predictive Process Monitoring
Creators: name: Weytjens, Hans
name: De Weerdt, Jochen
Publisher: name: arXiv
Year: 2021
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Advances in AI, and especially machine learning, are increasingly drawing research interest and efforts towards predictive process monitoring, the subfield of process mining (PM) that concerns predicting next events, process outcomes and remaining execution times. Unfortunately, researchers use a variety of datasets and ways to split them into training and test sets. The documentation of these preprocessing steps is not always complete. Consequently, research results are hard or even impossible to reproduce and to compare between papers. At times, the use of non-public domain knowledge further hampers the fair competition of ideas. Often the training and test sets are not completely separated, a data leakage problem particular to predictive process monitoring. Moreover, test sets usually suffer from bias in terms of both the mix of case durations and the number of running cases. These obstacles pose a challenge to the field's progress. The contribution of this paper is to identify and demonstrate the importance of these obstacles and to propose preprocessing steps to arrive at unbiased benchmark datasets in a principled way, thus creating representative test sets without data leakage with the aim of levelling the playing field, promoting open science and contributing to more rapid progress in predictive process monitoring.
description: Accepted for AI4BPM workshop at BMP2021 conferences
f(R) Gravity and Chameleon Theories
Creators: name: Brax, Philippe
name: van de Bruck, Carsten
name: Davis, Anne-Christine
name: Shaw, Douglas J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We analyse f(R) modifications of Einstein's gravity as dark energy models in the light of their connection with chameleon theories. Formulated as scalar-tensor theories, the f(R) theories imply the existence of a strong coupling of the scalar field to matter. This would violate all experimental gravitational tests on deviations from Newton's law. Fortunately, the existence of a matter dependent mass and a thin shell effect allows one to alleviate these constraints. The thin shell condition also implies strong restrictions on the cosmological dynamics of the f(R) theories. As a consequence, we find that the equation of state of dark energy is constrained to be extremely close to -1 in the recent past. We also examine the potential effects of f(R) theories in the context of the Eot-wash experiments. We show that the requirement of a thin shell for the test bodies is not enough to guarantee a null result on deviations from Newton's law. As long as dark energy accounts for a sizeable fraction of the total energy density of the Universe, the constraints which we deduce also forbid any measurable deviation of the dark energy equation of state from -1. All in all, we find that both cosmological and laboratory tests imply that f(R) models are almost coincident with a Lambda-CDM model at the background level.
description: 18 pages, 5 figures
Tunneling conductance in Superconductor/Ferromagnet junctions: a self consistent approach
Creators: name: Barsic, Paul H.
name: Valls, Oriol T.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We evaluate the tunneling conductance of clean Ferromomagnet/Superconductor junctions via a fully self-consistent numerical solution of the microscopic Bogoliubov-DeGennes equations. We present results for a relevant range of values of the Fermi wavevector mismatch (FWM), the spin polarization, and the interfacial scattering strength. For nonzero spin polarization, the conductance curves vary nonmonotonically with FWM. The FWM dependence of the self-consistent results is stronger than that previously found in non-self-consistent calculations, since, in the self-consistent case, the effective scattering potential near the interface depends on the FWM. The dependence on interfacial scattering is monotonic. These results confirm that it is impossible to characterize both the the FWM and the interfacial scattering by a single effective parameter and that analysis of experimental data via the use of such one-parameter models is unreliable.
description: 12 pages, including 8 figures
Photometric and Spectroscopic Analysis of Five Am Stars
Creators: name: Joshi, Gireesh C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The photometric analysis of sample Am stars is carried out to determine the stellar characteristics and to constrain the stellar dynamics. The spectroscopic analysis of the studied Am stars confirms their general characteristics of Am stars. The available data on elemental abundances for HD 113878 and HD 118660 have shown different characteristics during different epochs of observations. The basic stellar parameters (mass, luminosity, radius, life time, distance, proper-motion, etc.) are also determined to identify the stellar habitat zones for earth like exoplanet. Such information is important to identify suitable planets for human settlement in the near future. In this connection, the tidal radius and boundaries of the habitable zone of each star have been computed to support the search of an extra-terrestrial life around them. Asteroseismic mass scale test shows greater stellar masses comparable to the solar mass.
description: 13 pages, 4 figures, 8 tables. arXiv admin note: substantial text overlap with arXiv:1904.03511
Utilizzo di campi elettrici pulsati per aumentare il trasferimento di massa durante la marinatura/salagione di branzino
Creators: name: Zhu, Jing
Publisher: name: Zenodo
Year: 2021

description: Abstract

La ricerca di nuovi ingredienti per la formulazione di pesci da allevamento è un importante campo di ricerca in acquacoltura. Tuttavia, è importante verificare le performance tecnologiche dei prodotti ottenuti. I campioni di branzino utilizzati nella presente sperimentazione sono stati allevati con due diete biologiche formulate differentemente, la prima era di tipo tradizionale (commerciale), mentre la seconda era di tipo innovativo. L’obiettivo è stato quello di valutare l’effetto della dieta nella risposta all’applicazione di processi tecnologici quali applicazione di campi elettrici pulsati (PEF) e salamoiatura. Il pretrattamento PEF (0,3 kV/cm, 100 Hz, pulsi di 10 µs) aveva l’obiettivo di aumentare l’efficienza della fase di salamoiatura (immersione in soluzione al 10% di NaCl per 5 giorni). A tal fine sonio state valutate le cinetiche di trasferimento di massa e le principali caratteristiche qualitative dei campioni appartenenti alle due diete. Dai risultati ottenuti è possibile affermare che tra i due prodotti, derivanti da diete diverse, le differenze riscontrate sono state minime, sia in relazione ai parametri misurati sui prodotti freschi, sia in relazione alla risposta ai trattamenti tecnologici effettuati. A differenza di quanto riscontrato in studi precedenti, il PEF non ha migliorato la resa in peso ed acqua dopo salamoiatura, mentre solo nel prodotto innovativo si è verificato un aumento dell’assorbimento di sale, risultato che può indicare qualche differenza nella conformazione delle proteine che abbia facilitato la loro elettroporazione e pertanto la diffusione del sale nel tessuto. Tuttavia, risulta importante sottolineare le discrepanze osservate rispetto alle precedenti sperimentazioni che potrebbero imputarsi alla variabilità della materia prima. Questo aspetto merita un successivo approfondimento, in quanto potrebbe chiarire molte delle discrepanze riportate in letteratura relativamente all’applicazione dei PEF sui tessuti animali.
The velocity-density relation in the spherical model
Creators: name: Bilicki, Maciej
name: Chodorowski, Michał
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study the cosmic velocity-density relation using the spherical collapse model (SCM) as a proxy to non-linear dynamics. Although the dependence of this relation on cosmological parameters is known to be weak, we retain the density parameter Omega_m in SCM equations, in order to study the limit Omega_m -> 0. We show that in this regime the considered relation is strictly linear, for arbitrary values of the density contrast, on the contrary to some claims in the literature. On the other hand, we confirm that for realistic values of Omega_m the exact relation in the SCM is well approximated by the classic formula of Bernardeau (1992), both for voids (delta<0) and for overdensities up to delta ~ 3. Inspired by this fact, we find further analytic approximations to the relation for the whole range delta from -1 to infinity. Our formula for voids accounts for the weak Omega_m-dependence of their maximal rate of expansion, which for Omega_m < 1 is slightly smaller that 3/2. For positive density contrasts, we find a simple relation div v = 3 H_0 (Omega_m)^(0.6) [ (1+delta)^(1/6) - (1+delta)^(1/2) ], that works very well up to the turn-around (i.e. up to delta ~ 13.5 for Omega_m = 0.25 and neglected Omega_Lambda). Having the same second-order expansion as the formula of Bernardeau, it can be regarded as an extension of the latter for higher density contrasts. Moreover, it gives a better fit to results of cosmological numerical simulations.
description: 11 pages, 6 figures. Accepted for publication in MNRAS
Deriving the bulk properties of solar wind electrons observed by Solar Orbiter: A preliminary study of electron plasma thermodynamics
Creators: name: Nicolaou, Georgios
name: Wicks, Robert T.
name: Owen, Christopher J.
name: Kataria, Dhiren O.
name: Chandrasekhar, Anekallu
name: Lewis, Gethyn R.
name: Verscharen, Daniel
name: Fortunato, Vito
name: Mele, Gennaro
name: DeMarco, Rossana
name: Bruno, Roberto
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Plasma Physics (physics.plasm-ph)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: We demonstrate the calculation of solar wind electron bulk parameters from recent observations by Solar Wind Analyser Electron Analyser System on board Solar Orbiter. We use our methods to derive the electron bulk parameters in a time interval of a few hours. We attempt a preliminary examination of the polytropic behavior of the electrons by analyzing the derived electron density and temperature. Moreover, we discuss the challenges in analyzing the observations due to the spacecraft charging and photo-electron contamination in the energy range < 10 eV. Aims: We derive bulk parameters of thermal solar wind electrons by analyzing Solar Orbiter observations and we investigate if there is any typical polytropic model that applies to the electron density and temperature fluctuations. Methods: We use the appropriate transformations to convert the observations to velocity distribution functions in the instrument frame. We then derive the electron bulk parameters by a) calculating the statistical moments of the constructed velocity distribution functions and b) by fitting the constructed distributions with analytical expressions. We firstly test our methods by applying them to an artificial data-set, which we produce by using the forward modeling technique. Results: The forward model validates the analysis techniques which we use to derive the electron bulk parameters. The calculation of the statistical moments and the fitting method determines bulk parameters that are identical within uncertainty to the input parameters we use to simulate the plasma electrons in the first place. An application of our analysis technique to the data reveals a nearly isothermal electron "core". The results are affected by the spacecraft potential and the photo-electron contamination, which we need to characterize in detail in future analyses.
Effect of magnetic state on the $γ-α$ transition in iron: First-principle calculations of the Bain transformation path
Creators: name: Okatov, S. V.
name: Kuznetsov, A. R.
name: Gornostyrev, Yu. N.
name: Urtsev, V. N.
name: Katsnelson, M. I.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Energetics of the fcc ($γ$) - bcc ($α$) lattice transformation by the Bain tetragonal deformation is calculated for both magnetically ordered and paramagnetic (disordered local moment) states of iron. The first-principle computational results manifest a relevance of the magnetic order in a scenario of the $γ$ - $α$ transition and reveal a special role of the Curie temperature of $α$-Fe, $T_C$, where a character of the transformation is changed. At a cooling down to the temperatures $T < T_C$ one can expect that the transformation is developed as a lattice instability whereas for $T > T_C$ it follows a standard mechanism of creation and growth of an embryo of the new phase. It explains a closeness of $T_C$ to the temperature of start of the martensitic transformation, $M_s$.
description: 4 pages, 3 figures, submitted in Phys. Rev. Letters
Evidence of thin-film precursors formation in hydrokinetic and atomistic simulations of nano-channel capillary filling
Creators: name: Chibbaro, S.
name: Biferale, L.
name: Diotallevi, F.
name: Succi, S.
name: Binder, K.
name: Milchev, A.
name: Dimitrov, D.
name: Girardo, S.
name: Pisignano, D.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We present hydrokinetic Lattice Boltzmann and Molecular Dynamics simulations of capillary filling of high-wetting fluids in nano-channels, which provide clear evidence of the formation of thin precursor films, moving ahead of the main capillary front. The dynamics of the precursor films is found to obey the Lucas-Washburn law as the main capillary front, z2(t) proportional to t, although with a larger prefactor, which we find to take the same value for both geometries under inspection. Both hydrokinetic and Molecular Dynamics approaches indicate a precursor film thickness of the order of one tenth of the capillary diameter. The quantitative agreement between the hydrokinetic and atomistic methods indicates that the formation and propagation of thin precursors can be handled at a mesoscopic/hydrokinetic level, thereby opening the possibility of using hydrokinetic methods to space-time scales and complex geometries of direct experimental relevance.
description: 11 pages, 6 figures. submitted to PRL
STUDIO DELLA SHELF-LIFE DI FILETTI DI BRANZINO LEGGERMENTE SALATI PRETRATTATI CON CAMPI ELETTRICI PULS
Creators: name: Tazzari, Andrea
Publisher: name: Zenodo
Year: 2022

description: Introduzione
Il pesce è una materia prima altamente deperibile, il cui processo di deterioramento dovuto a fenomeni 
biochimici e legati alla proliferazione di microorganismi, inizia immediatamente in seguito alla morte 
dell’animale. Pertanto, pratiche di conservazione appropriate che siano in grado di prolungare la 
shelf-life di questa tipologia di prodotti si rivelano essenziali. (Nagarajarao, 2016). La salagione è una 
delle più antiche tecniche di conservazione dei prodotti ittici, già conosciuta ai tempi dei Greci e 
Romani. Da sempre, sono reperibili in commercio molte specie di pesci salati tra cui: sardine, 
acciughe, baccalà, branzino, aringhe e molti altri. In genere, questi prodotti contengono elevate 
concentrazioni di sale. Attualmente, a causa del cambiamento dello stile di vita dei consumatori e 
della crescente richiesta da parte del mercato di prodotti sani a basso contenuto di sodio e ready-toeat, una nuova tendenza del settore dei prodotti ittici è quella di creare prodotti leggermente salati 
(Fan et al., 2014). Oggi, la salagione viene anche utilizzata come tecnica preliminare all’affumicatura, 
all’essicazione e ai processi di cottura, in quanto è in grado di migliorare alcuni parametri sensoriali 
ed incrementare la shelf-life del prodotto finale (Cropotova et al., 2021). Ad esempio, il sale può 
interagire con la matrice proteica incrementando la capacità di ritenzione idrica del tessuto muscolare, 
migliorando alcuni parametri legati alla texture, come la succosità e la tenerezza delle carni. Tuttavia, 
il limite principale delle classiche tecniche di salagione consiste nel tempo di migrazione del sale 
all’interno del tessuto muscolare. Recentemente, pertanto, sono state valutate diverse tecniche 
innovative in grado di velocizzare i trasferimenti di massa del sale nel tessuto muscolare; alcune di 
queste sono la salagione assistita da ultrasuoni ad alta intensità, la salagione a vuoto pulsato e la 
salagione assistita da campi elettrici pulsati (PEF) (Cropotova et al., 2021). I campi elettrici pulsati
sono una tecnologia emergente che presenta un buon potenziale nella velocizzazione dei trasferimenti 
di massa nella salagione dei prodotti ittici. In generale, la tecnica PEF consiste nell’applicazione di 
alti voltaggi di breve durata su alimenti inseriti tra due elettrodi; questo causa modificazioni strutturali 
in grado di creare pori nelle membrane cellulari dei tessuti, aumentandone la permeabilizzazione 
tramite il meccanismo dell’elettroporazione (Cropotova et al., 2021).
L’obiettivo di questo studio è quello di valutare l’effetto dell’applicazione dei campi elettrici pulsati 
sulla shelf-life di filetti di branzino sottoposti ad una leggera salagione e confezionati in atmosfera 
protetta (MAP). Durante questo lavoro di tesi sono state indagate le differenze tra i filetti salati trattati 
con PEF e quelli non trattati.
Applicazione di campi elettrici pulsati per l'incremento del trasferimento di massa durante la salatura di filetti di branzino
Creators: name: Spataro, Francesco
Publisher: name: Zenodo
Year: 2020

description: Abstract
 L’utilizzo dei campi elettrici pulsati (PEF) ha recentemente guadagnato una crescente popolarità come tecnica emergente nella trasformazione e conservazione degli alimenti, tuttavia risultano ancora poche le applicazioni nel settore ittico. Nella presente sperimentazione, campioni di branzino sono stati sottoposti al pretrattamento con campi elettrici pulsati prima della salatura in salamoia, al fine di valutare l’eventuale effetto del PEF sull’incremento di velocità e di resa della salatura. L'intensità di corrente applicata è stata fissata a 10 e 20 A (corrispondenti a 300 e 600 V/cm) e sono state preparate due differenti soluzioni di salamoia, al 5 % e al 10% di NaCl. I risultati hanno dimostrato che il pretrattamento con PEF potrebbe essere impiegato efficacemente per ridurre la durata del trattamento in salamoia rispetto ai campioni di controllo (senza pretrattamento PEF), aumentando l’assorbimento di sale e favorendone al contempo una distribuzione più omogenea nei tessuti muscolari del pesce. Tuttavia, non sono state riscontrate differenze significative nella capacità di ritenzione idrica, nell'attività e distribuzione dell'acqua, tra campioni pretrattati con PEF e campioni di controllo durante l'intero periodo di salatura. L'acqua congelabile è stata invece influenzata dall'applicazione del PEF, ma l'effetto è stato significativo solo alla più bassa concentrazione di sale (5%) e durante i primi giorni di conservazione.
Noncommutative determinants, Cauchy-Binet formulae, and Capelli-type identities. I. Generalizations of the Capelli and Turnbull identities
Creators: name: Caracciolo, Sergio
name: Sportiello, Andrea
name: Sokal, Alan D.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Combinatorics (math.CO)
subject: Quantum Algebra (math.QA)
subject: Rings and Algebras (math.RA)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 15A15 (Primary), 05A19, 05A30, 05E15, 13A50, 15A24, 15A33, 15A72, 17B35, 20G05 (Secondary)

description: We prove, by simple manipulation of commutators, two noncommutative generalizations of the Cauchy-Binet formula for the determinant of a product. As special cases we obtain elementary proofs of the Capelli identity from classical invariant theory and of Turnbull's Capelli-type identities for symmetric and antisymmetric matrices.
description: LaTeX2e, 43 pages. Version 2 corrects an error in the statements of Propositions 1.4 and 1.5 (see new Remarks in Section 4) and includes a Note Added at the end of Section 1 comparing our work with that of Chervov et al (arXiv:0901.0235)
Applicazione di campi elettrici pulsati  per l'incremento del trasferimento di massa  durante la salatura di filetti di branzino
Creators: name: Spataro, Francesco
Publisher: name: Zenodo
Year: 2020

description: Abstract
L’utilizzo dei campi elettrici pulsati (PEF) ha recentemente guadagnato una crescente popolarità come tecnica emergente nella trasformazione e conservazione degli alimenti, tuttavia risultano ancora poche le applicazioni nel settore ittico. Nella presente sperimentazione, campioni di branzino sono stati sottoposti al pretrattamento con campi elettrici pulsati prima della salatura in salamoia, al fine di valutare l’eventuale effetto del PEF sull’incremento di velocità e di resa della salatura. L'intensità di corrente applicata è stata fissata a 10 e 20 A (corrispondenti a 300 e 600 V/cm) e sono state preparate due differenti soluzioni di salamoia, al 5 % e al 10% di NaCl. I risultati hanno dimostrato che il pretrattamento con PEF potrebbe essere impiegato efficacemente per ridurre la durata del trattamento in salamoia rispetto ai campioni di controllo (senza pretrattamento PEF), aumentando l’assorbimento di sale e favorendone al contempo una distribuzione più omogenea nei tessuti muscolari del pesce. Tuttavia, non sono state riscontrate differenze significative nella capacità di ritenzione idrica, nell'attività e distribuzione dell'acqua, tra campioni pretrattati con PEF e campioni di controllo durante l'intero periodo di salatura. L'acqua congelabile è stata invece influenzata dall'applicazione del PEF, ma l'effetto è stato significativo solo alla più bassa concentrazione di sale (5%) e durante i primi giorni di conservazione.
Clustering of fermionic truncated expectation values via functional integration
Creators: name: Salmhofer, Manfred
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 81T08,81T16,82B10

description: I give a simple proof that the correlation functions of many-fermion systems have a convergent functional Grassmann integral representation, and use this representation to show that the cumulants of fermionic quantum statistical mechanics satisfy l^1-clustering estimates.