cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Spiderweb nanomechanical resonators via Bayesian optimization: inspired by nature and guided by machine learning
Creators: name: Shin, Dongil
name: Cupertino, Andrea
name: de Jong, Matthijs H. J.
name: Steeneken, Peter G.
name: Bessa, Miguel A.
name: Norte, Richard A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Machine Learning (cs.LG)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: From ultra-sensitive detectors of fundamental forces to quantum networks and sensors, mechanical resonators are enabling next-generation technologies to operate in room temperature environments. Currently, silicon nitride nanoresonators stand as a leading microchip platform in these advances by allowing for mechanical resonators whose motion is remarkably isolated from ambient thermal noise. However, to date, human intuition has remained the driving force behind design processes. Here, inspired by nature and guided by machine learning, a spiderweb nanomechanical resonator is developed that exhibits vibration modes which are isolated from ambient thermal environments via a novel "torsional soft-clamping" mechanism discovered by the data-driven optimization algorithm. This bio-inspired resonator is then fabricated; experimentally confirming a new paradigm in mechanics with quality factors above 1 billion in room temperature environments. In contrast to other state-of-the-art resonators, this milestone is achieved with a compact design which does not require sub-micron lithographic features or complex phononic bandgaps, making it significantly easier and cheaper to manufacture at large scales. Here we demonstrate the ability of machine learning to work in tandem with human intuition to augment creative possibilities and uncover new strategies in computing and nanotechnology.
Ottimizzazione delle procedure di sintesi
peptidica e peptidomimetica mediante microonde
Creators: name: Aquino, Claudio
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2009

description: Negli ultimi anni nel campo della chimica farmaceutica è sempre maggiore il bisogno di poter sintetizzare nuove molecole organiche biologicamente attive, ma anche di poter ottimizzarne i processi sintetici e di purificazione. In questo contesto, assume una grande importanza l’individuazione di nuovi metodi che possano soddisfare tale richiesta, dal momento che quelli tradizionali di sintesi organica si sono rivelati, col tempo, troppo lenti. Per ovviare a questa domanda sempre crescente sono state sviluppate alcune tecniche capaci di aumentare la produttività nella sintesi organica. Un posto di primo rilievo spetta sicuramente all’applicazione delle microonde per il riscaldamento di reazioni che necessitano di una maggiore immissione di energia. Le microonde, radiazioni elettromagnetiche non ionizzanti che coprono l’intervallo di frequenza da 300 MHz a 300 GHz, comprese tra le radioonde e l’infrarossi, sono caratterizzate da livelli di energia del fotone inferiori di diversi ordini di grandezza alle energie di dissociazione dei legami chimici covalenti, ionici, ad idrogeno e persino delle deboli interazioni di Van der Waals. Le microonde utilizzate nelle strumentazioni di laboratorio sono in grado di attivare i livelli energetici rotazionali delle molecole, quindi questo miglioramento sembra dovuto alla capacità delle molecole, aventi un momento di dipolo non nullo, di assorbire l’energia fornita dalle radiazioni permettendo una rapida propagazione del calore in tutte le direzioni del corpo irradiato con il risultato che il riscaldamento è molto più rapido di quello tradizionale. Sebbene l’utilizzo delle microonde nella sintesi organica sia noto dal 1984, l’applicazione di questa tecnica si è diffusa soprattutto negli ultimi dieci anni. Durante la mia esperienza di dottorato di ricerca mi sono occupato di sintesi eterociclica, peptidica e peptidomimetica, supportata mediante la tecnica delle microonde. In particolar modo mi sono interessato della sintesi di composti a natura chinonica ad azione antitumorale, che presentano, come struttura base, il sistema 3-amino-3-etossicarbonil-2,3-diidrotieno[2,3-b]nafto-4,9-dione (DTNQ), coniugato a diverse catene laterali tramite un anello dichetopiperazinico, Figura 1. La parte peptidomimetica ha riguardato la sintesi di strutture -turn e di isosteri del legame peptidico, come il legame aminometilenico [CH2NH], a partire da nuovi building blocks, rappresentati da iododerivati di aminoacidi, Figura 2. Infine mi sono interessato dell’ottimizzazione della sintesi in fase solida mediante microonde di peptidi caratterizzati da difficile sequenza sintetica, quale ad esempio il -amiloide, noto componente di aggregati neuronali coinvolti nella genesi del morbo di Alzheimer, (Figura 3).
Supplemental Material for Tran Van et al., 2021
Creators: name: Van, Patrick Tran
name: Anselmetti, Yoann
name: Bast, Jens
name: Dumas, Zoé
name: Galtier, Nicolas
name: Jaron, Kamil S.
name: Martens, Koen
name: Parker, Darren J.
name: Robinson-Rechavi, Marc
name: Schwander, Tanja
name: Simion, Paul
name: Schön, Isa
Publisher: name: GSA Journals
Year: 2021
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: 60204 Freshwater Ecology
subject: 60408 Genomics
subject: Zoology

description: Supplementary Material describing more details of the genome assembly pipelines and assembly parameters (Sm1), the annotation of protein coding genes (SM2) and the estimation of genome size and heterozygosity by genome profiling analysis (SM3). The supplementary material also contains an overview of RNA sequencing reads from ostracods in GenBank (Table S1), the origin of the biological ostracod material of the study (Table S2), statistics of ostracod genome sequence data (Table S3), statistics of ostracod transcriptome sequence data (Table S4), statistics of ostracod resequencing data (Table S5), statistics of genome assemblies of ostracods (Table S6), statistics of protein coding gene annotations and other gene features in ostracod genomes (Table S7), and annotations and gene features of crustacean genomes of the last four years (Table S8). We also show results of GenomeScope analyses of two individuals of the ostracod Darwinula stevensoni and two of the ostracod Notodromas monacha (Figure S1A-D).
Device-independent quantum authorization based on the Clauser-Horne-Shimony-Holt game
Creators: name: Faleiro, Ricardo
name: Goulão, Manuel
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In the spirit of device-independent cryptography, we present a two-party quantum authorization primitive with non-locality as its fueling resource. Therein, users are attributed authorization levels granting them access to a private database accordingly. The authorization levels are encoded in the non-local resources distributed to the users, and subsequently confirmed by their ability to win CHSH games using such resources. We formalize the protocol, prove its security, and frame it in the device-independent setting employing the notion of CHSH self-testing via simulation. Finally, we provide a proof-of-concept implementation using the Qiskit open-source framework.
description: 6 pages, 1 figure, 1 table (similar to published version)
Additional file 2 of Xylanase production by Thermobacillus xylanilyticus is impaired by population diversification but can be mitigated based on the management of cheating behavior
Creators: name: Bouchat, Romain
name: Vélard, Frédéric
name: Audonnet, Sandra
name: Rioult, Damien
name: Delvigne, Frank
name: Rémond, Caroline
name: Rakotoarivonina, Harivony
Publisher: name: figshare
Year: 2022
Subjects: subject: Biochemistry
subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: Science Policy
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Hematology

description: Additional file 2: Table S1. Evolution of the relative growth rate and relative xylanase activity along generations.
Socotroniscus Ferrara & Taiti 1996
Creators: name: Taiti, Stefano
name: Checcucci, Ilaria
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Isopoda
Trachelipodidae
Socotroniscus

description: Genus Socotroniscus Ferrara & Taiti, 1996 Type-species: Socotroniscus sacciformis Ferrara & Taiti, 1996 by original designation and monotypy.
description: Published as part of Taiti, Stefano & Checcucci, Ilaria, 2009, New species and records of terrestrial Isopoda (Crustacea, Oniscidea) from Socotra Island, Yemen, pp. 73-103 in ZooKeys 31 (3) on page 95, DOI: 10.3897/zookeys.31.140, http://zenodo.org/record/576582
description: {"references": ["Ferrara F, Taiti S (1996) Terrestrial Isopoda (Crustacea) from Yemen. Fauna of Saudi Arabia 15: 118 - 136."]}
Additional file 3 of Xylanase production by Thermobacillus xylanilyticus is impaired by population diversification but can be mitigated based on the management of cheating behavior
Creators: name: Bouchat, Romain
name: Vélard, Frédéric
name: Audonnet, Sandra
name: Rioult, Damien
name: Delvigne, Frank
name: Rémond, Caroline
name: Rakotoarivonina, Harivony
Publisher: name: figshare
Year: 2022
Subjects: subject: Biochemistry
subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: Science Policy
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Hematology

description: Additional file 3: Table S2. Evolution of the growth rate on glucose along generations and xylanase activity after carbon source switch to xylan.
STUDI SUL RUOLO DELL'INIBITORE CITOSOLICO DI RIBONUCLEASI
Creators: name: Moscato, Marco
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2009

description: L’Inibitore citosolico di Ribonucleasi (cRI) è una proteina ubiquitaria, evolutivamente conservata, di circa 50 kDa; una peculiare caratteristica di questa proteina è l’alto contenuto di cisteine. cRI è un potente scavenger di ROS in vitro; l’ossidazione dei tioli provoca la formazione di ponti disolfurici intra-molecolari con un meccanismo del tipo tutto-o-nulla, innescato dall’ossidazione di residui cisteinici adiacenti altamente reattivi. È stato dimostrato che lo stress ossidativo determina (la formazione) di una forma ossidata di cRI in cellule intatte; d’altronde la deplezione di cRI aumenta la sensibilità della cellula allo stress ossidativo. Queste prove suggeriscono fortemente un ruolo per cRI nell’omeostasi redox cellulare. Ho eseguito esperimenti di coimmunoprecipitazione alla ricerca di proteine interagenti con cRI. A tal scopo, una forma ricombinate di cRI con il tag 3xFlag è stata espressa in cellule HeLa. Flag-cRI e le proteine interagenti sono state immunoprecipitate e l’eluizione è stata eseguita con il tampone di caricamento Laemmli o per competizione con il peptide 3xFlag. Gli immunocomplessi sono stati analizzati mediante SDS-PAGE, western blotting e spettrometria di massa. I risultati mostrano che, nelle condizioni usate per gli esperimenti di coimmunoprecipitazione anti-Flag, diverse proteine legano cRI: in particolare una banda di 40 kDA corrispondente all’ actina è stata identificata. La coimmunoprecipitazione inversa anti-actina ha confermato l’interazione Flag-cRI-actina. Altre proteine come la catena pesante della miosina non muscolare II-a, la tubulina, la GAPDH, la glicoproteina di membrana di 210 kDa dei pori nucleari, la proteina dello shock termico di 71 kDa, la sintasi degli acidi grassi, EF-Tu, sono state identificate in immunocomplessi mediante spettrometria di massa. Analisi citologiche di immunofluorescenza indicano che cRI, actina e tubulina colocalizzano parzialmente. Inoltre, analisi pull-down hanno dimostrato che l’interazione del Flag-cRI con actina purificata è inibita da reagenti tiolici. Questi risultati suggeriscono che cRI, come scavenger di ROS, potrebbe proteggere il citoscheletro da stress ossidativi. Comunque nelle mie condizioni sperimentali, cRI non forma ponti disolfurici con altre molecole in cellule HeLa, né in condizioni basali né dopo un trattamento con agenti ossidanti. Dall’esame degli estratti nucleari e citoplasmatici di cellule HeLa, come anche dalle analisi di immunofluorescenza, è emerso che cRI non è esclusivamente localizzato nel citosol, ma è presente anche nel nucleo.
Studio di markers cellulari per il biomonitoraggio ambientale marino e implicazioni bioetiche
Creators: name: Basile, Filomena
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2009

description: Sono stati studiati due markers eritrocitari (TfR e GPA) in un bioindicatore marino, la torpedine, allo scopo di determinare le variazioni di espressione dei suddetti markers a seguito di danno da irradiazione X. Sono stati utilizzati metodi citofluorimetrici e di immunocitochimica in microscopia ottica ed elettronica. Il recettore per la transferrina (TfR) è risultato, tra i due, il più sensibile, mostrando un notevole incremento ed internalizzazione a seguito di insulto da radiazioni. Sono state discusse le implicazioni bioetiche delle problematiche ambientali connesse all'uso di biomarkers e di bioindicatori.
Chandra Stacking Constraints on the Contribution of 24 micron Spitzer Sources to the Unresolved Cosmic X-ray Background
Creators: name: Steffen, A. T.
name: Brandt, W. N.
name: Alexander, D. M.
name: Gallagher, S. C.
name: Lehmer, B. D.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We employ X-ray stacking techniques to examine the contribution from X-ray undetected, mid-infrared-selected sources to the unresolved, hard (6-8 keV) cosmic X-ray background (CXB). We use the publicly available, 24 micron Spitzer Space Telescope MIPS catalogs from the Great Observatories Origins Deep Survey (GOODS) - North and South fields, which are centered on the 2 Ms Chandra Deep Field-North and the 1 Ms Chandra Deep Field-South, to identify bright (S_24 > 80 microJy) mid-infrared sources that may be powered by heavily obscured AGNs. We measure a significant stacked X-ray signal in all of the X-ray bands examined, including, for the first time, a significant (3.2 sigma) 6-8 keV stacked X-ray signal from an X-ray undetected source population. We find that the X-ray-undetected MIPS sources make up about 2% (or less) of the total CXB below 6 keV, but about 6% in the 6-8 keV band. The 0.5-8 keV stacked X-ray spectrum is consistent with a hard power-law (Gamma = 1.44 +/- 0.07), with the spectrum hardening at higher X-ray energies. Our findings show that these bright MIPS sources do contain obscured AGNs, but are not the primary source of the unresolved 50% of 6-8 keV CXB. Our study rules out obscured, luminous QSOs as a significant source of the remaining unresolved CXB and suggests that it most likely arises from a large population of obscured, high-redshift (z > 1), Seyfert-luminosity AGNs.
description: 5 pages (emulateapj format), 4 figures; submitted to ApJ Letters
Spin-orbital-momentum locking under odd-parity magnetic quadrupole ordering
Creators: name: Hayami, Satoru
name: Kusunose, Hiroaki
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Odd-parity magnetic and magnetic toroidal multipoles in the absence of both spatial-inversion and time-reversal symmetries are sources of multiferroic and nonreciprocal optical phenomena. We investigate electronic states caused by an emergent odd-parity magnetic quadrupole (MQ) as a representative example of magnetic odd-parity multipoles. It is shown that spontaneous ordering of the MQ leads to an antisymmetric spin-orbital polarization in momentum space, which corresponds to a spin-orbital momentum locking at each wave vector. By symmetry argument, we show that the orbital or sublattice degree of freedom is indispensable to give rise to the spin-orbital momentum locking. We demonstrate how the electronic band structures are modulated by the MQ ordering in the three-orbital system, in which the MQ is activated by the spin-dependent hybridization between the orbitals with different spatial parities. The spin-orbital momentum locking is related with the microscopic origin of cross-correlated phenomena, e.g., the magnetic-field-induced symmetric and antisymmetric spin polarization in the band structure, the current-induced distortion, and the magnetoelectric effect. We also discuss similar spin-orbital momentum locking in antiferromagnet where the MQ degree of freedom is activated through the antiferromagnetic spin structure in a sublattice system.
description: 16 pages, 12 figures, 2 tables
Symplectic integration of learned Hamiltonian systems
Creators: name: Offen, Christian
name: Ober-Blöbaum, Sina
Publisher: name: arXiv
Year: 2021
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 65P10, 93B30, 68T05

description: Hamiltonian systems are differential equations which describe systems in classical mechanics, plasma physics, and sampling problems. They exhibit many structural properties, such as a lack of attractors and the presence of conservation laws. To predict Hamiltonian dynamics based on discrete trajectory observations, incorporation of prior knowledge about Hamiltonian structure greatly improves predictions. This is typically done by learning the system's Hamiltonian and then integrating the Hamiltonian vector field with a symplectic integrator. For this, however, Hamiltonian data needs to be approximated based on the trajectory observations. Moreover, the numerical integrator introduces an additional discretisation error. In this paper, we show that an inverse modified Hamiltonian structure adapted to the geometric integrator can be learned directly from observations. A separate approximation step for the Hamiltonian data avoided. The inverse modified data compensates for the discretisation error such that the discretisation error is eliminated. The technique is developed for Gaussian Processes.
Parameter estimation and model selection for water sorption in a wood fibre material
Creators: name: Berger, Julien
name: Colinart, Thibaut
name: Loiola, Bruna R.
name: Orlande, Helcio R. B.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: The sorption curve is an essential feature for the modelling of heat and mass transfer in porous building materials. Several models have been proposed in the literature to represent the amount of moisture content in the material according to the water activity (or capillary pressure) level. These models are based on analytical expressions and few parameters that need to be estimated by inverse analysis. This article investigates the reliability of eight models through the accuracy of the estimated parameters. For this, experimental data for a wood fibre material are generated with special attention to the stop criterion to capture long time kinetic constants. Among five sets of measurements, the best estimate is computed. The reliability of the models is then discussed. After proving the theoretical identifiability of the unknown parameters for each model, the primary identifiability is analysed. It evaluates whether the parameters influence on the model output is sufficient to proceed the parameter estimation with accuracy. For this, a continuous derivative-based approach is adopted. Seven models have a low primary identifiability for at least one parameter. Indeed, when estimating the unknown parameters using the experimental observations, the parameters with low primary identifiability exhibit large uncertainties. Finally, an Approximation Bayesian Computation algorithm is used to simultaneously select the best model and estimate the parameters that best represent the experimental data. The thermodynamic and \textsc{Feng}--\textsc{Xing} models, together with a proposed model in this work, were the best ones selected by this algorithm.
Characterizing circumstellar disk around young stars
Creators: name: Schisano, Eugenio
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2010

description: The circumstellar disks play a fundamental role in star and planet formation
process. Studies on circumstellar disks are generally carried on following two
viable approaches: "statistical" studies, where a large samples of sources
are measured to determine mean disk common properties, detailed study
on individual objects can shed the light on processes, like mass accretion,
central star irradiation or photoevaporation, that compete in defining the
shape and the lifetime of the disks, improving the theoretical models or,
hopefully, to directly catch a planet in the process of forming.
Although both approaches converge toward a general scenario, they are sensitive only the disk dust component, while recently there is a strong interest on the gas, since it constitutes most of the mass of the circumstellar disks, determining the dust dynamic and the settling process, and its dispersal timescales limit the formation of gas giant planets.
In this work I present a synoptic study carried on the young stellar object
TCha, belonging to the class of "transition" disks, peculiar systems where
very rapid evolution is ongoing. Such transitional disks are rare and, due to
their classification based on the shape of the spectral energy distribution, do
not represent an homogeneous class. For such reasons the characterization
of any further object is extremely important to understand if we are dealing
with a planetary system in formation.
On the other side, I carried on a systematic study on recent discovered diagnostic for the gaseous disk component. The fine structure infrared emission line of [Ne ii] at 12.8 m has been discovered in more than  70 object. This line is thought to be produced by X-ray irradiation of the warm protoplanetary disk atmospheres, however the observational correlation between [Ne ii]luminosities and measured X-ray luminosities shows a large scatter. Such spread limits the utility of this line as a probe of the gaseous phase of disks, as several authors have suggested pollution by outflows as a probable cause of the observed scatter. For the first time with this work it has been explored the possibility that the large variations in the observed [Ne ii] luminosity may be caused instead by different star-disk parameters.
Xeroniscus Ferrara & Taiti 1990
Creators: name: Taiti, Stefano
name: Checcucci, Ilaria
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Isopoda
Eubelidae
Xeroniscus

description: Genus Xeroniscus Ferrara & Taiti, 1990 Type-species: Periscyphis brevicaudatus Ferrara, 1973 by original designation.
description: Published as part of Taiti, Stefano & Checcucci, Ilaria, 2009, New species and records of terrestrial Isopoda (Crustacea, Oniscidea) from Socotra Island, Yemen, pp. 73-103 in ZooKeys 31 (3) on page 96, DOI: 10.3897/zookeys.31.140, http://zenodo.org/record/576582
description: {"references": ["Ferrara F, Taiti S (1990) A new genus of Eubelidae (Crustacea Isopoda Oniscidea) from the Horn of Africa and the Arabian Peninsula. Tropical Zoology 3: 89 - 105.", "Ferrara F (1973) Observations on some species of Periscyphis (terrestrial isopods) gathered in Somalia. Monitore Zoologico Italiano, Nuova Serie, Supplemento 5: 61 - 79."]}
title: Characterisation of multipartite entanglement beyond the single-copy paradigm
Creators: name: Friis, Nicolai
Publisher: name: TU Wien
Year: 2023
Subjects: multipartite entanglement
biseparability

description: Entanglement shared among multiple parties presents complex challenges for the characterisation of different types of entanglement. One of the most basic insights is the fact that some mixed states can feature entanglement across every possible bipartition of a multipartite system, yet can be biseparable, i.e., can be produced via a mixture of partially separable states. To distinguish biseparable states from those states that genuinely cannot be produced from mixing partially separable states, the term genuine multipartite entanglement was coined. The premise for this distinction is that only a single copy of the state is distributed and locally acted upon. However, advances in quantum technologies prompt the question of how this picture changes when multiple copies of the same state become locally accessible. In this talk I will discuss recent work [1] in which we show that multiple copies unlock genuine multipartite entanglement from partially separable states, even from undistillable ensembles, and we demonstrate that more than two copies can be required to observe this effect. Our results show that a modern theory of entanglement in multipartite systems, which includes the potential to locally process multiple copies of distributed quantum states, exhibits a rich structure that goes beyond the convex structure of single copies. Indeed, based on our results, we present two conjectures about this structure: (i) the existence of a hierarchy of k-copy activatable states, for which k-1 copies remain biseparable, but k copies are GME, and (ii) the asymptotic collapse of the hierarchy of genuinely k-partite entangled states, i.e., that k copies of any biseparable but not partition-separable state become GME as k tends to infinity. In other words, we conjecture separability in multipartite systems to asymptotically collapse to the simple bipartite concept of separability in scenarios with unbounded numbers of copies, and we show that two copies are certainly not sufficient for reaching this simple limit, thus leaving the practical certification a rich problem to be studied. If time permits, I will also give an overview of recent work [2] on the problem of distributing multiple copies of multipartite entangled states and how techniques from quantum estimation theory can aid in such tasks [1] Hayata Yamasaki, Simon Morelli, Markus Miethlinger, Jessica Bavaresco, Nicolai Friis, and Marcus Huber, Activation of genuine multipartite entanglement: beyond the single-copy paradigm of entanglement characterisation, Quantum 6, 695 (2022) [arXiv:2106.01372] [2] Simon Morelli, David Sauerwein, Michalis Skotiniotis, and Nicolai Friis, Metrology-assisted entanglement distribution in noisy quantum networks, Preprint: arXiv:2110.15627 [quant-ph] (2021)
Metal-insulator transition by isovalent anion substitution in Ga1-xMnxAs: Implications to ferromagnetism
Creators: name: Stone, P. R.
name: Alberi, K.
name: Tardif, S. K. Z.
name: Beeman, J. W.
name: Yu, K. M.
name: Walukiewicz, W.
name: Dubon, O. D.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We have investigated the effect of partial isovalent anion substitution in Ga1-xMnxAs on electrical transport and ferromagnetism. Substitution of only 2.4% of As by P induces a metal-insulator transition at a constant Mn doping of x=0.046 while the replacement of 0.4 % As with N results in the crossover from metal to insulator for x=0.037. This remarkable behavior is consistent with a scenario in which holes located within an impurity band are scattered by alloy disorder in the anion sublattice. The shorter mean free path of holes, which mediate ferromagnetism, reduces the Curie temperature TC from 113 K to 60 K (100 K to 65 K) upon the introduction of 3.1 % P (1% N) into the As sublattice.
description: 16 pages, 4 figures
Indagine epidemiologica per l'individuazione di patologia carotidea nella popolazione della città di Napoli e provincia.
Creators: name: Di Lorenzo, Michele
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2011

description: Il Prof. Giancarlo Bracale  responsabile del progetto, Direttore della Cattedra di Chirurgia Vascolare dell’Università degli Studi di Napoli Federico II, ha elaborato un progetto di ricerca, approvato dalla Regione Campania, per individuare soggetti portatori di placche aterosclerotiche a livello delle carotidi, allo scopo di ridurre l’insorgenza dell’ictus e delle sue conseguenze fatali o altamente invalidanti. Il ricorso allo screening predittivo è giustificato principalmente dall'assunzione del fatto che, l'endoaterectomia carotidea per le lesioni di grado elevato, in pazienti asintomatici, diagnosticate in modo occasionale durante lo stesso, possa ridurre il rischio di ictus e di mortalità.
Novel ultra-small micelles based on ginsenoside Rb1: a potential nanoplatform for ocular drug delivery
Creators: name: Li, Mengshuang
name: Lan, Jie
name: Li, Xuefei
name: Xin, Meng
name: Wang, Hui
name: Zhang, Fan
name: Lu, Xiaohong
name: Zhuang, Zengfang
name: Wu, Xianggen
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Biochemistry
subject: Space Science
subject: Physical Sciences not elsewhere classified
subject: Microbiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: Biological Sciences not elsewhere classified

description: Objectives: Ginsenosides Rb1 (Rb1) could form micelles in aqueous solutions. Self-assembled Rb1 micelles could potentially be utilized as ocular drug delivery system, and it was postulated that the encapsulation of a medicine within Rb1 micelles might strengthen the drug’s therapeutic action and reduce side effects. Methods: Diclofenac-loaded Rb1 micelles (Rb1-Dic micelles) were formulated, optimized, and then further evaluated for in vitro cytotoxicity/in vivo ocular irritation, in vivo corneal permeation, and in vivo anti-inflammatory efficacy. Results: Rb1 self-assembled into micelles with ultra-small particle size (<8 nm) in a homogeneous distribution state (polydispersity index [PDI] < 0.3). Diclofenac was highly encapsulated into the micelles according to the weight ratios of Rb1 to diclofenac. The ophthalmic solution of Rb1-Dic micelle was simple to prepare. Rb1 had good cellular tolerance, and it also improved the cellular tolerance of the encapsulated diclofenac. Rb1-Dic micelles also showed non-irritants to the rabbit eyes. The use of Rb1 micelles significantly improved the in vivo corneal permeation as well as the anti-inflammatory efficacy of diclofenac when compared to commercial diclofenac eye drops. Conclusion: Rb1 micelle formulations have great potential as a novel ocular drug delivery system to improve the bioavailability of drugs such as diclofenac.
title: Enabling global scale Sentinel-1 time series analysis through streaming
Creators: name: Raml, Bernhard
name: Vreugdenhil, Mariette
name: Massart, Samuel Julian A
name: Navacchi, Claudio
name: Wagner, Wolfgang
Publisher: name: TU Wien
Year: 2023
Subjects: Data assimilation
scalability
High-Performance computing
datacube
Sentinel-1

description: Dense, high-resolution Synthetic Aperture Radar (SAR) time series from Sentinel-1 offer unique opportunities for monitoring soil moisture. The retrieval process is however challenging due to complex physical processes affecting SAR backscatter, such as vegetation and subsurface scattering effects. Furthermore, the considerable Sentinel-1 data volume introduces its own logistical and computational challenges. This study introduces a novel method for high-throughput calculation of temporal correlation, illustrating how an astute choice of algorithm can facilitate time series analysis on unfavourable data structures. Concretely, we demonstrate how a data streaming approach, with interleaved data reading and processing, can be deployed to efficiently calculate temporal Pearson correlation from a datacube structured as an image stack. Enabled by the substantially reduced computational and memory demands, global calculation of backscatter sensitivity to soil moisture dynamics at a 20 m resolution became feasible. This advancement carries potential for significantly enhancing the accuracy of soil moisture retrievals using SAR backscatter data.
Ferrante d'Aragona e la ricerca di un'egemonia politica in Italia
Creators: name: De Filippo, Marco Sabatino
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2011

description: La tesi è dedicata al ruolo di Ferrante d’Aragona, re di Napoli, nelle relazioni internazionali europee e all’interno del sistema politico dell’Italia del Quattrocento. Si analizza il primo ventennio di governo, prescindendo dalla crisi apertasi con la seconda rivolta baronale e dal disastroso epilogo della dinastia negli ultimi anni del secolo. Punto nodale del lavoro è la messa a fuoco della progettualità volta al conseguimento di un’egemonia politico-diplomatica napoletana in Italia, soprattutto in rapporto all’alleanza con gli Sforza di Milano.
Xeroniscus angusticauda Ferrara & Taiti 1990
Creators: name: Taiti, Stefano
name: Checcucci, Ilaria
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Isopoda
Eubelidae
Xeroniscus
Xeroniscus angusticauda

description: Xeroniscus angusticauda Ferrara & Taiti, 1990 Xeroniscus angusticauda Taiti & Ferrara, 2004: 289, fig. 51. Material examined. Socotra: 4 ♁♁, 4 ♀♀, Hadibo, 12°39'N 54°01'E, under stones, 11.I.2003, leg. S. Taiti, MZUF-9267; 3 ♁♁, 3 ♀♀, same data, NHCY (MZUF). Distribution. Continental Yemen and Socotra Island. On Socotra the species has certainly been introduced since it has been collected only in and around houses in Hadibo.
description: Published as part of Taiti, Stefano & Checcucci, Ilaria, 2009, New species and records of terrestrial Isopoda (Crustacea, Oniscidea) from Socotra Island, Yemen, pp. 73-103 in ZooKeys 31 (3) on pages 96-97, DOI: 10.3897/zookeys.31.140, http://zenodo.org/record/576582
description: {"references": ["Ferrara F, Taiti S (1990) A new genus of Eubelidae (Crustacea Isopoda Oniscidea) from the Horn of Africa and the Arabian Peninsula. Tropical Zoology 3: 89 - 105.", "Taiti S, Ferrara F (2004) The terrestrial Isopoda (Crustacea: Oniscidea) of the Socotra Archipelago. Fauna of Arabia 20: 211 - 325."]}
Topological André-Quillen homology for cellular commutative $S$-algebras
Creators: name: Baker, Andrew
name: Gilmour, Helen
name: Reinhard, Philipp
Publisher: name: arXiv
Year: 2007
Subjects: subject: Algebraic Topology (math.AT)
subject: K-Theory and Homology (math.KT)
subject: FOS: Mathematics
subject: 55P43 (Primary); 13D03, 55N35, 55P48 (Secondary)

description: Topological André-Quillen homology for commutative $S$-algebras was introduced by Basterra following work of Kriz, and has been intensively studied by several authors. In this paper we discuss it as a homology theory on CW $S$-algebras and apply it to obtain results on minimal atomic $p$-local $S$-algebras which generalise those of Baker and May for $p$-local spectra and simply connected spaces. We exhibit some new examples of minimal atomic $S$-algebras.
description: Final revision, a version will appear in Abhandlungen aus dem Mathematischen Seminar der Universitaet Hamburg
Ruolo cardioprotettivo della Protimosina Alfa
Creators: name: Cannavo, Alessandro
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2011

description: Il gene umano della Protimosina alfa (PTα) codifica per una piccola proteina nucleare altamente acida ed espressa in molti tessuti quali il cuore, dove però il suo ruolo è ignoto. Per valutare il ruolo della PTα nell’ischemia cardiaca, abbiamo utilizzato un modello murino di infarto del miocardio acuto (IMA) indotto dalla legatura chirurgica della coronaria sinistra. Topi sottoposti alla stessa procedura chirurgica, ma senza legatura della coronaria, sono stati usati come controllo (SHAM). 7 giorni dopo la legatura, abbiamo valutato i livelli di espressione della PTα nel siero e nel cuore mediante immunoblot e immunoistochimica. Al fine di analizzare gli effetti di tale proteina nel cuore, abbiamo espresso e purificato una forma ricombinante di PTα privata del segnale di localizzazione nucleare (NLS). Tale proteina ricombinante (160 nM) è stata successivamente utilizzata per trattare cardiomiociti neonatali di ratto, sottoposti a sola ischemia o ad ischemia/riperfusione (I/R). I risultati ottenuti dimostrano che i livelli di PTα aumentano significativamente sia nel siero che nel cuore dei topi IMA rispetto ai topi SHAM. Tale incremento osservato, è evidente prettamente nell’area cardiaca che è noto essere caratterizzata da fenomeni di apoptosi e necrosi. L’analisi dei livelli di espressione di PTα in vitro su cardiomiociti neonatali di ratto sottoposti ad ischemia o ad I/R, mostra come l’aumento sia più marcato durante I/R rispetto alle cellule ischemiche e alle cellule non ischemiche. Il trattamento con PTα dopo I/R risulta in una marcata riduzione della percentuale di necrosi e di apoptosi, valutata mediante colorazione con ioduro di propidio ed annessina V, ed un consistente aumento della percentuale di sopravvivenza cellulare, stimata con il saggio MTT, rispetto alle cellule non ischemiche e a quelle ischemiche ed I/R non trattate. In conclusione, questo studio suggerisce che gli aumentati livelli riscontrati nel cuore e nel siero di un modello di IMA possano avere un potenziale effetto cardioprotettivo e che pertanto la PTα possa rappresentare un nuovo marcatore e adiuvante terapeutico della cardiopatia ischemica.
L'endomicroscopia confocale laser nello studio delle lesioni neoplastiche colo-rettali.
Creators: name: Salvatori, Francesca
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2011

description: L’endomicroscopia confocale laser (CLE) è una strumentazione endoscopica di recente introduzione che rende possibile la visualizzazione di immagini in tempo reale ad alta magnificazione della mucosa gastrointestinale in corso di endoscopia.L'elettromicroscopia confocale laser ha la potenzialità di avere un ruolo di primo piano nell'esame endoscopico in particolare nella diagnosi precoce delle neoplasie colorettali.
In questo studio abbiamo esaminato la applicabilità nella pratica clinica di tale metodica nello studio delle lesioni neoplastiche colorettali e ne abbiamo valutato l'accuratezza diagnostica in comparazione all'esame istologico convenzionale, considerato come gold standard.
L'elettromicroscopia confocale laser ha mostrato una alto grado di correlazione con l'istologia e potrà certamente avere un ruolo nella diagnosi delle lesioni mucose colorettali e nell'identificazionbe precoce della displasia intraepiteliale.
A stress-based approach to the solution of Saint Venant problem
Creators: name: Guarino, Sergio
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2011

description: The proposed formulation is based on the solution of the Neumann problem associated with the shear stress field by exploiting an intrinsic particular integral of the differential problem emerging from Baldacci’s approach to
Saint-Venant problem. In this way the representation obtained for the shear stress field, for the shear center and for the shear flexibility tensor presents the advantage of being independent from the particular reference frame and
of being written in intrinsic, and hence more synthetic, form.
Periscyphis Gerstaecker 1873
Creators: name: Taiti, Stefano
name: Checcucci, Ilaria
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Isopoda
Eubelidae
Periscyphis

description: Genus Periscyphis Gerstaecker, 1873 Type-species: Periscyphis trivialis Gerstaecker, 1873 by monotypy.
description: Published as part of Taiti, Stefano & Checcucci, Ilaria, 2009, New species and records of terrestrial Isopoda (Crustacea, Oniscidea) from Socotra Island, Yemen, pp. 73-103 in ZooKeys 31 (3) on page 97, DOI: 10.3897/zookeys.31.140, http://zenodo.org/record/576582
Double barrier potentials for matter-wave gap solitons
Creators: name: Ahufinger, V.
name: Malomed, B. A.
name: Birkl, G.
name: Corbalan, R.
name: Sanpera, A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We investigate collisions of solitons of the gap type, supported by a lattice potential in repulsive Bose-Einstein condensates, with an effective double-barrier potential that resembles a Fabry-Perot cavity. We identify conditions under which the trapping of the entire incident soliton in the cavity is possible. Collisions of the incident soliton with an earlier trapped one are considered too. In the latter case, many outcomes of the collisions are identified, including merging, release of the trapped soliton with or without being replaced by the incoming one, and trapping of both solitons.
description: 5 pages, 4 figures
SQUID based multichannel system for brain functional imaging
Creators: name: Vettoliere, Antonio
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2012

description: A multichannel system for brain imaging containing 163 SQUID magnetometers arranged in a helmet shaped multisensorial array has been developed. To this aim, a previous investigation of a several SQUID configurations has been performed in order to choose a SQUID sensor having best performance for brain imaging on the basis of system working conditions.
In particular, magnetometer and planar gradiometer have been designed, fabricated and characterized. Furthermore, a small magnetometer has been also taken into account. Since it has been decided to work in a magnetically shielding room a SQUID magnetometer has been chosen in order to guarantees high magnetic field sensitivity. These SQUID magnetometers are based on an integrated Ketchen design including a superconducting flux transformer consisting of a pickup coil and a multiturn input coil inductively coupled to the SQUID loop in a washer shape. The circuits for Flux Locked loop (FLL) operations and for Additional Positive Feedback including a thin film resistor network for gain adjusting, are integrated on the same chip containing the SQUID magnetometer. A magnetic field spectral noise as low as 1.8 fT/Hz measured in FLL operation, ensures the sensor capability to detect the tiny magnetic filed arising from brain activity.
More than 200 SQUID magnetometers have been fabricated and characterized selecting the sensors with best performance.
154 measurement sensors are arranged in a SQUID multisensorial array properly designed and customized realized. Further 9 channels are located far from the scalp on three bakelite towers in order to realize via software a gradiometer to background noise rejection.
The system properties have been investigated including the estimation of background noise, the shielding factor of the magnetically shielding room and the Dewar performance.
Finally, preliminary measurements have been successfully performed. In particular, some brain activities such as the alpha rhythm, a spontaneous activity of a human having closed eyes and the evoked activity concerning the tapping of left and right forefinger have been analyzed.
The same activities have been co-registered using the 32-channels EEG to measure bioelectric activity. The good agreement between EEG and MEG data indicates that the system operates properly.
Iron abundances of B-type post-Asymptotic Giant Branch stars in globular clusters: Barnard 29 in M 13 and ROA 5701 in omega Cen
Creators: name: Thompson, H. M. A.
name: Keenan, F. P.
name: Dufton, P. L.
name: Ryans, R. S. I.
name: Smoker, J. V.
name: Lambert, D. L.
name: Zijlstra, A. A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: High resolution optical and ultraviolet spectra of two B-type post-Asymptotic Giant Branch (post-AGB) stars in globular clusters, Barnard 29 in M 13 and ROA 5701 in omega Cen, have been analysed using model atmosphere techniques. The optical spectra have been obtained with FEROS on the ESO 2.2-m telescope and the 2d-Coudé spectrograph on the 2.7-m McDonald telescope, while the ultraviolet observations are from the GHRS on the HST. Abundances of light elements (C, N, O, Mg, Al and S) plus Fe have been determined from the optical spectra, while the ultraviolet data provide additional Fe abundance estimates from Fe III absorption lines in the 1875-1900 Å wavelength region. A general metal underabundance relative to young B-type stars is found for both Barnard 29 and ROA 5701. These results are consistent with the metallicities of the respective clusters, as well as with previous studies of the objects. The derived abundance patterns suggest that the stars have not undergone a gas-dust separation, contrary to previous suggestions, although they may have evolved from the AGB before the onset of the third dredge-up. However, the Fe abundances derived from the HST spectra are lower than those expected from the metallicities of the respective clusters, by 0.5 dex for Barnard 29 and 0.8 dex for ROA 5701. A similar systematic underabundance is also found for other B-type stars in environments of known metallicity, such as the Magellanic Clouds. These results indicate that the Fe III ultraviolet lines may yield abundance values which are systematically too low by typically 0.6 dex and hence such estimates should be treated with caution.
description: 15 pages, 3 figures. Accepted for publication in MNRAS
Numerical simulation of optimal transport paths
Creators: name: Xia, Qinglan
Publisher: name: arXiv
Year: 2008
Subjects: subject: Optimization and Control (math.OC)
subject: Combinatorics (math.CO)
subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 90C35, 49Q20 (Primary) 68W25, 90B18 (Secondary)

description: This article provides numerical simulation of an optimal transport path from a single source to an atomic measure of equal total mass. We first construct an initial transport path, and then modify the path as much as possible by using both local and global minimization algorithms.
description: 11 pages, 13 figures