cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Automorphisms of elliptic Poisson algebras
Creators: name: Makar-Limanov, Leonid
name: Turusbekova, Umut
name: Umirbaev, Ualbai
Publisher: name: arXiv
Year: 2008
Subjects: subject: Rings and Algebras (math.RA)
subject: Symplectic Geometry (math.SG)
subject: FOS: Mathematics

description: We describe the automorphism groups of elliptic Poisson algebras on polynomial algebras in three variables and give an explicit set of generators and defining relations for this group.
description: 10 pages
Very Low-Mass Objects in the Coronet Cluster: The Realm of the Transition Disks
Creators: name: Sicilia-Aguilar, Aurora
name: Henning, Thomas
name: Juhász, Attila
name: Bouwman, Jeroen
name: Garmire, Gordon
name: Garmire, Audrey
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present optical and IR spectra of a set of low-mass stars and brown dwarfs in the Coronet cluster (aged ~1Myr), obtained with the multifiber spectrograph FLAMES/VLT and IRS/Spitzer. The optical spectra reveal spectral types between M1 and M7.5, confirm the youth of the objects (via Li 6708 A absorption), and show the presence of accretion (via Halpha) and shocks (via forbidden line emission). The IRS spectra, together with IR photometry from the IRAC/MIPS instruments on Spitzer and 2MASS, confirm the presence of IR excesses characteristic of disks around ~70% of the objects. Half of the disks do not exhibit any silicate emission, or present flat features characteristic of large grains. The rest of the disks show silicate emission typical of amorphous and crystalline silicate grains a few microns in size. About 50% of the objects with disks do not show near-IR excess emission, having "transitional" disks, according to their classical definition. This is a very high fraction for such a young cluster. The large number of "transitional" disks suggests lifetimes comparable to the lifetimes of typical optically thick disks. Therefore, these disks may not be in a short-lived phase, intermediate between Class II and Class III objects. The median spectral energy distribution of the disks in the Coronet cluster is also closer to a flat disk than observed for the disks around solar-type stars in regions with similar age. The differences in the disk morphology and evolution in the Coronet cluster could be related to fact that these objects have very late spectral types compared to the solar-type stars in other cluster studies. Finally, the optical spectroscopy reveals that one of the X-ray sources is produced by a Herbig Haro object in the cloud.
description: 51 pages, 13 figures, 10 tables
Additional file 1 of “They choke to death in front of your very eyes”: nurses’ lived experiences and perspectives on end-of-life care during COVID-19
Creators: name: Sperling, Daniel
Publisher: name: figshare
Year: 2024
Subjects: subject: Biochemistry
subject: Medicine
subject: Cell Biology
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Cancer

description: Supplementary Material 1
Approximate volume and integration for basic semi-algebraic sets
Creators: name: Henrion, Didier
name: Lasserre, Jean Bernard
name: Savorgnan, Carlo
Publisher: name: arXiv
Year: 2008
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: 14P10, 11E25, 12D15, 90C25

description: Given a basic compact semi-algebraic set $\K\subset\R^n$, we introduce a methodology that generates a sequence converging to the volume of $\K$. This sequence is obtained from optimal values of a hierarchy of either semidefinite or linear programs. Not only the volume but also every finite vector of moments of the probability measure that is uniformly distributed on $\K$ can be approximated as closely as desired, and so permits to approximate the integral on $\K$ of any given polynomial; extension to integration against some weight functions is also provided. Finally, some numerical issues associated with the algorithms involved are briefly discussed.
Statistical Mechanics of the Glass Transition in One-Component Liquids with Anisotropic Potential
Creators: name: Ilyin, Valery
name: Lerner, Edan
name: Lo, Ting-Shek
name: Procaccia, Itamar
Publisher: name: arXiv
Year: 2007
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study a recently introduced model of one-component glass-forming liquids whose constituents interact with anisotropic potential. This system is interesting per-se and as a model of liquids like glycerol (interacting via hydrogen bonds) which are excellent glass formers. We work out the statistical mechanics of this system, encoding the liquid and glass disorder using appropriate quasi-particles (36 of them). The theory provides a full explanation of the glass transition phenomenology, including the identification of a diverging length scale and a relation between the structural changes and the diverging relaxation times.
description: 4 pages, 6 figures
Extended Zee model for Neutrino Mass, Leptogenesis and Sterile Neutrino like Dark Matter
Creators: name: Sahu, Narendra
name: Sarkar, Utpal
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We propose an extension of the standard model with a $U(1)_{\rm B-L}$ global symmetry that accommodates radiative neutrino masses along with dark matter and leptogenesis. The observed matter antimatter asymmetry of the universe is generated through the leptogenesis route keeping the $U(1)_{\rm B-L}$ symmetry intact. The $B-L$ global symmetry is then softly broken, providing the sub-eV neutrino masses. The model then incorporates a MeV scale sterile neutrino like dark matter.
description: Significantly revised, accepted for publication in PRD
Exact solution of the two-axis two-spin Hamiltonian
Creators: name: Pan, Feng
name: Zhang, Yao-Zhong
name: Qi, Xiaohan
name: Liang, Yue
name: Zhang, Yuqing
name: Draayer, Jerry P.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: Bethe ansatz solution of the two-axis two-spin Hamiltonian is derived based on the Jordan-Schwinger boson realization of the SU(2) algebra. It is shown that the solution of the Bethe ansatz equations can be obtained as zeros of the related extended Heine-Stieltjes polynomials. Symmetry properties of excited levels of the system and zeros of the related extended Heine-Stieltjes polynomials are discussed. As an example of an application of the theory, the two equal spin case is studied in detail, which demonstrates that the levels in each band are symmetric with respect to the zero energy plane perpendicular to the level diagram and that excited states are always well entangled.
description: 12 pages, 2 figures. The number of solutions and proof for their completeness, as well as some other minor changes, are provided in this revised version
Resonant tidal responses in rotating fluid bodies: global modes hidden beneath localized wave beams
Creators: name: Lin, Yufeng
name: Ogilvie, Gordon I.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: In rotating stars and planets, excitation of inertial waves in convective envelopes provides an important channel for tidal dissipation, but the dissipation rate due to inertial waves depends erratically on the tidal frequency. Tidal dissipation is significantly enhanced at some frequencies, suggesting possible resonances between the tidal forcing and some eigenmodes. However, the nature of these resonances remains enigmatic owing to the singularity of the eigenvalue problem of inertial waves, and the resonances are often mistakenly attributed to wave attractors in the literature. In this letter, we reveal that resonant tidal responses correspond to inertial modes with large-scale flows hidden beneath localized wave beams. Strong couplings between the tidal forcing and the hidden large-scale flows intensify the localized wave beams emanating from the critical latitudes, leading to enhanced tidal dissipation. This study resolves a long-standing puzzle regarding the frequency-dependence of tidal dissipation due to inertial waves in convective envelopes.
description: 11 pages, 5 figures, Accepted for publication in ApJL
Connections between galaxy properties and halo formation time in the cosmic web
Creators: name: Zhang, Youcai
name: Yang, Xiaohu
name: Guo, Hong
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: By linking galaxies in Sloan Digital Sky Survey (SDSS) to subhaloes in the ELUCID simulation, we investigate the relation between subhalo formation time and the galaxy properties, and the dependence of galaxy properties on the cosmic web environment. We find that central and satellite subhaloes have different formation time, where satellite subhaloes are older than central subhaloes at fixed mass. At fixed mass, the galaxy stellar-to-subhalo mass ratio is a good proxy of the subhalo formation time, and increases with the subhalo formation redshifts, especially for massive galaxies. The subhalo formation time is dependent on the cosmic web environment. For central subhaloes, there is a characteristic subhalo mass of $\sim 10^{12} \msun$, below which subhaloes in knots are older than subhaloes of the same mass in filaments, sheets, or voids, while above which it reverses. The cosmic web environmental dependence of stellar-to-subhalo mass ratio is similar to that of the subhalo formation time. For centrals, there is a characteristic subhalo mass of $\sim 10^{12} \msun$, below which the stellar-to-subhalo mass ratio is higher in knots than in filaments, sheets and voids, above which it reverses. Galaxies in knots have redder colors below $10^{12} \msun$, while above $10^{12} \msun$, the environmental dependence vanishes. Satellite fraction is strongly dependent on the cosmic web environment, and decreases from knots to filaments to sheets to voids, especially for low-mass galaxies.
description: 13 pages, 15 figures, accepted by MNRAS
Nonlinear molecular excitations in a completely inhomogeneous DNA chain
Creators: name: Daniel, M.
name: Vasumathi, V.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We study the nonlinear dynamics of a completely inhomogeneous DNA chain which is governed by a perturbed sine-Gordon equation. A multiple scale perturbation analysis provides perturbed kink-antikink solitons to represent open state configuration with small fluctuation. The perturbation due to inhomogeneities changes the velocity of the soliton. However, the width of the soliton remains constant.
SOME COMMENTS ON THE LEGAL INITIATIVE OF THE PROSECUTION GENERAL
Creators: name: Saidov, Shokhrukhon
Publisher: name: Zenodo
Year: 2023

description: This article for the first time tells about the history of the emergence of the right of the Prosecutor General of the Republic of Uzbekistan to legislative initiative, its improvement, the activities of the prosecutor's office in the field of lawmaking, the analysis of the scientific and theoretical views of scientists.
title: Benchmarking Computational Methods for Bioorthagonal Diels-Alder Cycloadditions
Creators: name: Gruber, Lorenz
Publisher: name: TU Wien
Year: 2025
Subjects: subject: click chemistry
subject: bioorthogonal chemistry
subject: computational chemistry

description: Arbeit an der Bibliothek noch nicht eingelangt - Daten nicht geprueft - gesperrte Arbeit (bis 2027-02-28+01:00)
description: Abweichender Titel nach Übersetzung der Verfasserin/des Verfassers
Particle-vibration coupling within covariant density functional theory
Creators: name: Litvinova, E.
name: Ring, P.
name: Tselyaev, V.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Covariant density functional theory, which has so far been applied only within the framework of static and time dependent mean field theory is extended to include Particle-Vibration Coupling (PVC) in a consistent way. Starting from a conventional energy functional we calculate the low-lying collective vibrations in Relativistic Random Phase Approximation (RRPA) and construct an energy dependent self-energy for the Dyson equation. The resulting Bethe-Salpeter equation in the particle-hole ($ph$) channel is solved in the Time Blocking Approximation (TBA). No additional parameters are used and double counting is avoided by a proper subtraction method. The same energy functional, i.e. the same set of coupling constants, generates the Dirac-Hartree single-particle spectrum, the static part of the residual $ph$-interaction and the particle-phonon coupling vertices. Therefore a fully consistent description of nuclear excited states is developed. This method is applied for an investigation of damping phenomena in the spherical nuclei with closed shells $^{208}$Pb and $^{132}$Sn. Since the phonon coupling terms enrich the RRPA spectrum with a multitude of $ph\otimes$phonon components a noticeable fragmentation of the giant resonances is found, which is in full agreement with experimental data and with results of the semi-phenomenological non-relativistic approach.
description: 40 pages, 5 figures
L’interazione tra sistema economico e sistema politico, l’influenza della  distribuzione del reddito sulla crescita economica
Creators: name: Purificato, Francesco
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2006

description: Il risultato di maggior rilievo di questo lavoro è quello di essere riusciti a fondare una struttura logica che consenta di interpretare in modo agevole il complesso processo di interazione tra sistema politico e sistema economico; soprattutto, una struttura logica che integra in modo originale gli approcci teorici delle funzioni di influenza, delle funzioni di interesse e neokaleckiano, che fino ad ora erano stati considerati alternativi oppure non erano mai stati messi in relazione gli uni con gli altri. Nell’ambito di questa struttura logica è importante il concetto di gruppo di pressione, in quanto si ipotizza che la politica economica sia condizionata dall’attività di lobbying. Il principale obiettivo è quello di analizzare le conseguenze per la crescita economica di scelte politiche frutto di processi di lobbying che trovano le loro motivazioni nella distribuzione del reddito; in questo caso, l’impiego dell’approccio teorico neokaleckiano riflette la necessità di studiare le dinamiche economiche come risultanza delle dinamiche assunte dalla domanda effettiva. Alla luce di queste osservazioni si evidenzia che le diverse ipotesi che caratterizzano il sistema economico ed il sistema politico devono essere interpretate, più che come limitazioni dell’analisi, come il nocciolo di futuri indirizzi di ricerca che potranno privilegiare l’esame di aspetti dell’uno oppure dell’altro sistema. In definitiva, questo lavoro vuole fornire una serie di nuovi strumenti, sia logici che analitici, che consentano di interpretare in modo più agevole la realtà; realtà di cui si è esaminato un aspetto cruciale: l’influenza della distribuzione del reddito sulla crescita economica mediata dal processo di interazione tra sistema economico e sistema politico.
New europium complexes and their use in red light-emitting diodes and vapoluminescent sensors
Creators: name: Devi, Rachna
name: Boddula, Rajamouli
name: Singh, Kasturi
name: Kumar, Satendra
name: Vaidyanathan, Sivakumar
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Biophysics
subject: Biochemistry
subject: Space Science
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Cancer

description: Three novel trivalent europium [Eu(III)] complexes – Eu(DBM)3Phen-Ph-Ph, Eu(DBM)3Phen-mCF3-Ph, and Eu(DBM)3Phen-pCF3-Ph – were designed, synthesized, and characterized using various spectroscopic methods. Then their photophysical characteristics were investigated. The Eu complexes in the solid phase showed a pure red emission (due to the electric dipole transitions of the Eu3+ ion). In a solution, they had multiple emissions due to their ligand contribution. The solvatochromism studies revealed that the Eu(III) complexes in the methanol and DMSO solutions had both metal ion and ligand emissions with similar intensities, which yielded a white emission. Of all the Eu(III) complexes, Eu(DBM)3Phen-mCF3-Ph showed the best quantum yield. In addition, the fluorinated mCF3 ligand had an unusually high lifetime value. Its remarkable linear decrease in luminescence intensity with increasing temperature opens a new window for its use as a sensitive temperature sensor at the 30–80°C range. The CIE color coordinates of the fabricated red LEDs (InGaN) are very close to the standard NTSC CIE color coordinates for bright red emissions, and the color purity as well as the LER values of the fabricated red LEDs are also very good. The Eu(III) complexes exhibited on-off photoluminescence switching via the vapoluminescent process and responded best to the acid-base (HCl-NH3) vapors. All these features suggest that the synthesized Eu(III) complexes are efficient candidates for red-emitting LEDs and vapoluminescent sensors. Organic chromophores, which are phenanthro-imidazole ligands based on fluorinated moieties coordinated with Eu(III) metal ions, very efficiently facilitate energy transfer from the ligand to the Eu(III) ion. The CIE color coordinates of the complexes showed a bright pure red emission, with x = 0.66 and y = 0.33 (612 nm). The fabricated light-emitting diode (LED) showed superior color quality and the complexes showed on-off-on luminescence behavior after exposure to the acid-base vapors.
La valutazione della strategia negli Enti Locali: l'applicazione delle Balanced Scorecard
Creators: name: Finamore, Valeria
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2006

description: L’introduzione di modelli di gestione manageriale, il cambiamento dei valori guida dell’agire amministrativo, il continuo mutamento dei rapporti di forza tra componente politica e componente gestionale introdotti dalla normativa, richiedono agli Enti Locali una nuova capacità di pianificazione e controllo strategico. Gli strumenti che sono stati previsti a supporto di questo nuovo agire, appaiono, sebbene innovativi e di indubbia utilità, ancora insufficienti a supportare l’Ente in una corretta azione di pianificazione e controllo strategico.
Con la presente ricerca si è inteso analizzare lo stato di attuazione del controllo strategico negli Enti Locali della Regione Campania e comprendere la possibilità di supportare tale processo attraverso l’utilizzo dello strumento delle Balanced Scorecard.
Nuovi approcci alla Land Evaluation: un caso studio nel lodigiano
Creators: name: Manna, Piero
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2006

description: Il suolo rappresenta uno degli elementi fondamentali della biosfera e necessita di una politica globale di gestione, valutazione e conservazione. Tale politica per essere applicata richiede necessariamente informazioni armonizzate sia nel tempo che nello spazio. In passato il modo in cui l’uomo sfruttava le risorse del territorio evolveva lentamente, in modo graduale, come risultato di decisioni prese da singoli individui separatamente. Oggi, in un mondo sempre più complesso e densamente popolato, sta diventando sempre più urgente la necessità di pianificare qualsiasi forma di utilizzo del territorio, sfruttando al meglio le risorse ambientali e nello stesso tempo preservare tali risorse per il futuro. Una fase fondamentale della pianificazione è quella comunemente definita Valutazione del Territorio o Land Evaluation. La land evaluation nasce dall’interpretazione della carta pedologica che costituisce il documento informativo di base e che illustra le caratteristiche ed i modelli di distribuzione geografica dei suoli presenti nell’ambito di un determinato territorio. Dalla sua consultazione è possibile desumere una vasta gamma di informazioni, che si prestano ad essere impiegate nei più diversi settori attinenti la pianificazione territoriale. Il risultato finale è la produzione di carte derivate contenenti l’informazione richiesta, esplicitata in forma semplice e comprensibile da una vasta gamma di utenti non necessariamente specializzati. Tuttavia, l’approccio odierno alla Land Evaluation consente valutazioni di tipo puramente qualitativo, e che considerano poco o nulla delle moderne ricerche e delle conoscenze acquisite negli ultimi anni  sui processi che avvengono nel sistema suolo. Cosicché oggi, parallelamente alla diffusione di tecniche produttive sempre più complesse e precise, l’interesse si è rivolto ad approcci alla land evaluation in grado di dare risposte di tipo quantitativo. I recenti sviluppi avutisi nel settore delle simulazioni mediante computer, hanno aperto la strada alla diffusione di tali sistemi anche negli studi di valutazione territoriale. Il presente lavoro costituisce un approccio moderno alla land evaluation il cui obiettivo è in linea con le considerazioni precedentemente fatte: migliorare il processo di valutazione del territorio, mediante l’impiego di: a) tecniche stocastiche (geostatistica) e deterministiche (environmental correlation) per lo studio della distribuzione spaziale delle variabili ambientali; b) modelli fisicamente basati per la simulazione dei processi idrologici nei suoli e per la simulazione della crescita delle colture.
Tether-cutting and Overlying Magnetic Reconnections in an MHD Simulation of Prominence-cavity System
Creators: name: Liu, Tie
name: Su, Yingna
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We investigate the magnetic reconnection in an MHD simulation of a coronal magnetic flux rope (MFR) confined by a helmet streamer, where a prominence-cavity system forms. This system includes a hot cavity surrounding a prominence with prominence horns and a central hot core above the prominence. The evolution of the system from quasi-equilibrium to eruption can be divided into four phases: quasi-static, slow rise, fast rise, and propagation phases. The emerged MFR initially stays quasi-static and magnetic reconnection occurs at the overlying high-Q (squashing factor) apex region, which gradually evolves into a hyperbolic flux tube (HFT). The decrease of the integrated magnetic tension force (above the location of the overlying reconnection) is due to the removal of overlying confinement by the enhanced overlying reconnection between the MFR and the overlying fields at the apex HFT, thus engines the slow rise of the MFR with a nearly constant velocity. Once the MFR reaches the regime of torus instability, another HFT immediately forms at the dip region under the MFR, followed by the explosive flare reconnection. The integrated resultant force (above the location of the flare reconnection) exponentially increases, which drives the exponential fast rise of the MFR. The system enters the propagation phase, once its apex reaches the height of about one solar radius above the photosphere. The simulation reproduces the main processes of one group of prominence eruptions especially those occurring on the quiet Sun.
description: 15 pages, 11 figures
WARP: a direct search for Dark Matter
Creators: name: Santorelli, Roberto
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2006

description: [ITALIANO] L’esperimento WARP (WIMP Argon Programme)ha come scopo la rivelazione dell’interazine delle WIMP tramite lo scattering elastico su un bersaglio di Argon liquido. La rivelazione simultanea dell’immediata scintillazione in Argon liquido e di quella ritardata proveniente dalla estrazione degli elettroni di ionizzazione nella fase gassosa, fornisce una chiara identificazione degli eventi di rinculo in un range di 10-100keV. Ai Laboratori Nazionali del Gran Sasso una camera prototipo di 2.3l ha operato per oltre un anno raccogliendo più di  5x106 eventi. Sono riportati i risultati della stima della contaminazione 39Ar e del potere di reiezione degli eventi di fondo raggiungibile tramite tale tecnica.
Un rivelatore di 100l di volume sensibile è in costruzione e sarà capace di raggiungere un sensitività di 10-8 pbarn. E’ riportata la simulazione MonteCarlo per la stima degli eventi di fondo e i risalatati preliminari dei test sui fotomotiplicatori criogenici. / [ENGLISH] The WARP (WIMP Argon Programme) experiment aims to the detection of WIMP elastic scattering interactions occurring in a target of liquid Argon. The simultaneous detection of prompt scintillation light in liquid Argon and delayed signals coming form the extraction of ionization electrons in the gas phase provides a clean identification of recoil events in the range 10-100 keV. At Laboratori Nazionali del Gran Sasso a 2.3 liter prototype has been operated for one year collecting more than 5x106 events. Results on the amount of 39Ar isotope in commercial liquid Argon together with a study on the background rejection power achievable by the event selection technique is reported. A 100 liter detector is  under construction will be able to achieve a sensitivity of few 10-8 pbarn. A MonteCarlo simulation about background studies and the  description of the preliminary tests of the cryogenic photomultipliers are also reported.
Analisi funzionale in mammiferi ed in Caenorhabditis elegans dell’enzima ε-N-trimetil-lisina idrossilasi: una proteina implicata nella biosintesi della carnitina
Creators: name: Monfregola, Jlenia
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2006

description: La carnitina è la molecola deputata al trasporto degli acidi grassi a catena lunga dal citoplasma cellulare alla matrice mitocondriale. Questo trasporto è essenziale per il metabolismo energetico della cellula in quanto è nella matrice mitocondriale che gli acidi grassi vengono  β-ossidati.
La fonte principale di carnitina per un organismo è la dieta. Gli alimenti con alto contenuto proteico come carne e fegato di manzo sono quelli più ricchi di carnitina, mentre il latte di mucca e alcuni prodotti cerealicoli, come grano e riso, danno solo un discreto apporto di questo metabolita.
In realtà numerosi organismi sono in grado di sintetizzare questa molecola in maniera endogena mediante un processo chiamato: BIOSINTESI della CARNITINA
In questi organismi la sintesi di carnitina avviene a partire dagli amminoacidi lisina e metionina. La biosintesi di carnitina avviene in quattro tappe catalizzate da quattro rispettivi enzimi: la ε-trimetil-lisina diossigenasi (TMLD); la HTML aldolasi (HTMLA),  la TMABA deidrogenasi, e la beta-butirro-betaina diossigenasi (BBD), che trasforma la butirrobetaina in carnitina. Molto si conosce sul ruolo svolto dalla carnitina e sui soui effetti pleiotropici, mentre ben poco si conosce sul ruolo svolto dalla sua biosintesi. Il mio studio si è concentrato: 1) sulla caratterizzazione funzionale del primo enzima della biosintesi della carnitina TMLD, la cui reazione sembra essere la tappa limitante di questo processo; 2) sull’isolamento  e sullo studio degli ortologhi di questo enzima in organismi modello quali Mus musculus e Caenorhabtidis elegans.
Conjectures on exact solution of three - dimensional (3D) simple orthorhombic Ising lattices
Creators: name: Zhang, Zhi-dong
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We report the conjectures on the three-dimensional (3D) Ising model on simple orthorhombic lattices, together with the details of calculations for a putative exact solution. Two conjectures, an additional rotation in the fourth curled-up dimension and the weight factors on the eigenvectors, are proposed to serve as a boundary condition to deal with the topologic problem of the 3D Ising model. The partition function of the 3D simple orthorhombic Ising model is evaluated by spinor analysis, by employing these conjectures. Based on the validity of the conjectures, the critical temperature of the simple orthorhombic Ising lattices could be determined by the relation of KK* = KK' + KK'' + K'K'' or sinh 2K sinh 2(K' + K'' + K'K''/K) = 1. For a simple cubic Ising lattice, the critical point is putatively determined to locate exactly at the golden ratio xc = exp(-2Kc) = (sq(5) - 1)/2, as derived from K* = 3K or sinh 2K sinh 6K = 1. If the conjectures would be true, the specific heat of the simple orthorhombic Ising system would show a logarithmic singularity at the critical point of the phase transition. The spontaneous magnetization and the spin correlation functions of the simple orthorhombic Ising ferromagnet are derived explicitly. The putative critical exponents derived explicitly for the simple orthorhombic Ising lattices are alpha = 0, beta = 3/8, gamma = 5/4, delta = 13/3, eta = 1/8 and nu = 2/3, showing the universality behavior and satisfying the scaling laws. The cooperative phenomena near the critical point are studied and the results obtained based on the conjectures are compared with those of the approximation methods and the experimental findings. The 3D to 2D crossover phenomenon differs with the 2D to 1D crossover phenomenon and there is a gradual crossover of the exponents from the 3D values to the 2D ones.
description: 176 pages, 4 figures
title: Stepping into the integration of digital literacy in the CLIL approach
Creators: name: Diaz, Natacha R.
Publisher: name: CETAPS, Faculdade de Ciências Sociais e Humanas, Universidade NOVA de Lisboa
Year: 2024

description: This article explores the pedagogical effectiveness of implementing digital literacy in a CLIL program. This investigation was conducted in a bilingual high school located in Southern Tenerife (Canary Islands, Spain). An action research investigation was developed with a group (n= 30) in the third grade of Compulsory Secondary Education. A learning intervention was designed and implemented in the discipline of Social Science belonging to a CLIL program, and digital literacy was also included in the pedagogical instruction. The results obtained demonstrate that learners’ utilization of digital tools does not necessarily mean digital literacy development; the treatment and guidance of digital learning can be integrated within the CLIL approach resulting in positive outcomes when the CLIL approach is combined with project-based and cooperative learning.
description: Diaz, Natacha R. (2024) “Stepping into the integration of digital literacy in the CLIL approach”, e-TEALS, 16, pp. 25-42. ISSN 1647-721X
Hinting a dark matter nature of Sgr A* via the S-stars
Creators: name: Becerra-Vergara, E. A.
name: Argüelles, C. R.
name: Krut, A.
name: Rueda, J. A.
name: Ruffini, R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The motion data of the S-stars around the Galactic center gathered in the last 28 yr imply that Sgr A* hosts a supermassive compact object of about $4\times 10^6$ $M\odot$, a result awarded with the Nobel Prize in Physics 2020. A non-rotating black hole (BH) nature of Sgr A* has been uncritically adopted since the S-star orbits agree with Schwarzschild geometry geodesics. The orbit of S2 has served as a test of General Relativity predictions such as the gravitational redshift and the relativistic precession. The central BH model is, however, challenged by the G2 post-peripassage motion and by the lack of observations on event-horizon-scale distances robustly pointing to its univocal presence. We have recently shown that the S2 and G2 astrometry data are better fitted by geodesics in the spacetime of a self-gravitating dark matter (DM) core - halo distribution of 56 keV-fermions, "darkinos", which also explains the outer halo Galactic rotation curves. This Letter confirms and extends this conclusion using the astrometry data of the $17$ best-resolved S-stars, thereby strengthening the alternative nature of Sgr A* as a dense core of darkinos.
description: Accepted for publication in MNRAS Letters
Direct measurement of a pure spin current by a polarized light beam
Creators: name: Wang, Jing
name: Zhu, Bang-Fen
name: Liu, Ren-Bao
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The photon helicity may be mapped to a spin-1/2, whereby we put forward an intrinsic interaction between a polarized light beam as a ``photon spin current'' and a pure spin current in a semiconductor, which arises from the spin-orbit coupling in valence bands as a pure relativity effect without involving the Rashba or the Dresselhaus effect due to inversion asymmetries. The interaction leads to circular optical birefringence, which is similar to the Faraday rotation in magneto-optics but nevertheless involve no net magnetization. The birefringence effect provide a direct, non-demolition measurement of pure spin currents.
description: Erratum version to [Physical Review Letter 100, 086603 (2008)]
Space-Time Diffeomorphisms in Noncommutative Gauge Theories
Creators: name: Rosenbaum, Marcos
name: Vergara, J. David
name: Juarez, L. Roman
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: In previous work [Rosenbaum M. et al., J. Phys. A: Math. Theor. 40 (2007), 10367-10382, hep-th/0611160] we have shown how for canonical parametrized field theories, where space-time is placed on the same footing as the other fields in the theory, the representation of space-time diffeomorphisms provides a very convenient scheme for analyzing the induced twisted deformation of these diffeomorphisms, as a result of the space-time noncommutativity. However, for gauge field theories (and of course also for canonical geometrodynamics) where the Poisson brackets of the constraints explicitely depend on the embedding variables, this Poisson algebra cannot be connected directly with a representation of the complete Lie algebra of space-time diffeomorphisms, because not all the field variables turn out to have a dynamical character [Isham C.J., Kuchar K.V., Ann. Physics 164 (1985), 288-315, 316-333]. Nonetheless, such an homomorphic mapping can be recuperated by first modifying the original action and then adding additional constraints in the formalism in order to retrieve the original theory, as shown by Kuchar and Stone for the case of the parametrized Maxwell field in [Kuchar K.V., Stone S.L., Classical Quantum Gravity 4 (1987), 319-328]. Making use of a combination of all of these ideas, we are therefore able to apply our canonical reparametrization approach in order to derive the deformed Lie algebra of the noncommutative space-time diffeomorphisms as well as to consider how gauge transformations act on the twisted algebras of gauge and particle fields. Thus, hopefully, adding clarification on some outstanding issues in the literature concerning the symmetries for gauge theories in noncommutative space-times.
description: This is a contribution to the Special Issue on Deformation Quantization, published in SIGMA (Symmetry, Integrability and Geometry: Methods and Applications) at http://www.emis.de/journals/SIGMA/
The effects of temperature, pH and retention time on volatile fatty acids production from primary sludge
Creators: name: Gupta, Ashok Kumar
Publisher: name: University of British Columbia
Year: 2010

description: A typical biological phosphorus removal process consists of alternate anaerobic and aerobic zones. Recent research at the University of British Columbia (UBC) has indicated that the addition of volatile fatty acids (VFA's) to the anaerobic zone of Bio-P processes improves the overall phosphorus removal efficiency, at least when treating weak sewage. At the full-scale biological phosphorus removal plant at Kelowna, B.C., and at a pilot-scale facility at UBC, anaerobic fermentation of primary sludge has been used to produce VFA's to add to the anaerobic zone of these processes. The primary objective of this research was to improve the knowledge of the acid phase of anaerobic digestion (the production of VFA's) to help achieve optimum design and operation of the fermenter. The effects of temperature, retention time and pH on the production of short-chain VFA's from primary sewage sludge were studied at lab-scale. Oxidation reduction potential (ORP) was also monitored throughout the study to explore the relationship between ORP and the production of VFA's. A completely random 3X3X2 factorial experimental design was used to determine the experimental sequence. Three litre anaerobic reactors were run on a fill and draw basis in a temperature-controlled room. Reactors were fed once a day with primary sludge brought from the UBC pilot plant. Results showed that the net VFA production consistently improved with increase in temperature in the range of 10°C to 30°C. At low temperatures (10°C and 20°C) the net VFA production improved with the increase in retention time; however extension of the retention time to 9 days at 30°C appeared detrimental to VFA production. The effect of pH control, at a value of 7.0, was not consistent with both retention time and temperature and had a confounding effect. At 10°C and 20°C temperatures, a relationship was observed between ORP and VFA production. No definite relationship between the net VFA production and ORP was found at 30°C.
Leptostylopsis Dillon 1956
Creators: name: Lingafelter, Steven
name: Micheli, Charyn
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Cerambycidae
Leptostylopsis

description: Leptostylopsis Dillon Leptostylopsis annulipes (Fisher 1942), comb. n. [from Leptostylus] Leptostylopsis hispaniolae (Fisher 1942), syn. n. Leptostylopsis argentatus (Jacquelin du Val 1857) Leptostylopsis basifulvus Lingafelter and Micheli, sp. n. Leptostylopsis caliginosus Lingafelter and Micheli, sp. n. Leptostylopsis chlorescens Lingafelter and Micheli, sp. n. Leptostylopsis cristatus (Fisher 1925) Leptostylopsis humerofulvus Lingafelter and Micheli, sp. n. Leptostylopsis milleri (Fisher 1932) Leptostylopsis perfasciatus Lingafelter and Micheli, sp. n. Leptostylopsis poeyi (Fisher 1925), comb. n. [from Leptostylus] Leptostylopsis puntacanaensis Lingafelter and Micheli, sp. n. Leptostylopsis thomasi Lingafelter and Micheli, sp. n. Leptostylopsis viridicomus (Fisher 1942), comb. n. [from Leptostylus]
description: Published as part of Lingafelter, Steven & Micheli, Charyn, 2009, The genus Leptostylopsis of Hispaniola (Coleoptera, Cerambycidae, Acanthocinini), pp. 1-55 in ZooKeys 17 (17) on page 53, DOI: 10.3897/zookeys.17.217, http://zenodo.org/record/576491
description: {"references": ["Fisher WS (1942) New West Indian cerambycid beetles, III. Torreia 10: 1 - 43.", "Jacquelin du Val PNC (1857) In: R. de la Sagra, Histoire Physique, Politique et Naturelle de l'Ile de Cuba 7: 1 - 328.", "Fisher WS (1925) New West Indian Cerambycidae (Coleoptera). Subfamily Lamiinae. American Museum Novitates 174: 1 - 16.", "Fisher WS (1932) New West Indian cerambycid beetles. Proceedings of the United States National Museum 80 (22): 1 - 93."]}
Determination of the size, mass, and density of "exomoons" from photometric transit timing variations
Creators: name: Simon, A.
name: Szatmary, K.
name: Szabo, G. M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Precise photometric measurements of the upcoming space missions allow the size, mass, and density of satellites of exoplanets to be determined. Here we present such an analysis using the photometric transit timing variation ($TTV_p$). We examined the light curve effects of both the transiting planet and its satellite. We define the photometric central time of the transit that is equivalent to the transit of a fixed photocenter. This point orbits the barycenter, and leads to the photometric transit timing variations. The exact value of $TTV_p$ depends on the ratio of the density, the mass, and the size of the satellite and the planet. Since two of those parameters are independent, a reliable estimation of the density ratio leads to an estimation of the size and the mass of the exomoon. Upper estimations of the parameters are possible in the case when an upper limit of $TTV_p$ is known. In case the density ratio cannot be estimated reliably, we propose an approximation with assuming equal densities. The presented photocenter $TTV_p$ analysis predicts the size of the satellite better than the mass. We simulated transits of the Earth-Moon system in front of the Sun. The estimated size and mass of the Moon are 0.020 Earth-mass and 0.274 Earth-size if equal densities are assumed. This result is comparable to the real values within a factor of 2. If we include the real density ratio (about 0.6), the results are 0.010 Earth-Mass and 0.253 Earth-size, which agree with the real values within 20%.
description: 6 pages, 5 figures, to appear in Astronomy and Astrophysics
Additional file 1 of The impact of prior exposure to hypoglycaemia on the inflammatory response to a subsequent hypoglycaemic episode
Creators: name: Verhulst, Clementine E. M.
name: van Heck, Julia I. P.
name: Fabricius, Therese W.
name: Stienstra, Rinke
name: Teerenstra, Steven
name: McCrimmon, Rory J.
name: Tack, Cees J.
name: Pedersen-Bjergaard, Ulrik
name: de Galan, Bastiaan E.
Publisher: name: figshare
Year: 2024
Subjects: subject: Immunology
subject: FOS: Clinical medicine

description: Additional file 1. Supplement 1: in-and exclusions criteria.
Basal pressure variations induced by a turbulent flow over a wavy surface
Creators: name: Claudin, P.
name: Louge, M.
name: Andreotti, B.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: Turbulent flows over wavy surfaces give rise to the formation of ripples, dunes and other natural bedforms. To predict how much sediment these flows transport, research has focused mainly on basal shear stress, which peaks upstream of the highest topography, and has largely ignored the corresponding pressure variations. In this article, we reanalyze old literature data, as well as more recent wind tunnel results, to shed a new light on pressure induced by a turbulent flow on a sinusoidal surface. While the Bernoulli effect increases the velocity above crests and reduces it in troughs, pressure exhibits variations that lag behind the topography. We extract the in-phase and in-quadrature components from streamwise pressure profiles and compare them to hydrodynamic predictions calibrated on shear stress data.
description: 17 pages, 7 figures
Wave hindcast sensitivity to wind forcing
Creators: name: Hodgins, Sandra Leella Margaret
Publisher: name: University of British Columbia
Year: 2010

description: Efficient planning and safe operation of marine vessels and coastal structures require good understanding of wave properties, usually expressed in statistical terras. In the absence of very long direct measurement records, spectral wave hindcasting is routinely used to derive design and operating criteria. The method involves solution of a time-dependent energy balance equation including spatial propagation, growth due to local wind, non-linear transfers between frequency components and dissipation processes. The most important source of errors in a careful hindcast is the input wind which is normally derived from historical surface pressure data. Since spectral wave models generate a sea-state that is almost in balance with local winds, wind sea is largely independent of the preceding storm history. Swell energy, on the other hand, propagates freely at off-wind angles perpetuating any errors that occurred in its generation. Shallow water near-shore zones are usually modelled with a small-area, nested subgrid that receives boundary data from the surrounding large-area model. Since the wave energy solution within the submodel can be dominated by the boundary conditions, errors in the large-area model must be minimized. The purpose of this study was to investigate the sensitivity of hindcast wave fields to prescribed errors in the evolution of the wind patterns. Using a radially symmetric model of surface pressure, five parameters were used to define storm evolution: storm trajectory, minimum central low pressure, rate of storm intensification, advection rate and storm size. Sensitivity analyses of each parameter were used to obtain the likely maximum attributable variation in the significant wave height field. On this basis, and considering wind sea only, the three most important parameters are (1) trajectory, (2) minimum central pressure and (3) advection rate. With careful wind field re-construction, wave hindcasts of specific events can be performed to acceptable engineering standards for extreme value analysis. However, for the present, climatological (continuous multi-year) wave databases constructed by spectral hindcasting will be too inaccurate to warrant their cost. The most promising advance for wave hindcasting (and forecasting) is the possibility of acquiring high-resolution wind and wave data with satellite sensors to eliminate the need for inherently inaccurate surface pressure data.
Betweenness centrality of teams in social networks
Creators: name: Lee, Jongshin
name: Lee, Yongsun
name: Oh, Soo Min
name: Kahng, B.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Betweenness centrality (BC) was proposed as an indicator of the extent of an individual's influence in a social network. It is measured by counting how many times a vertex (i.e., an individual) appears on all the shortest paths between pairs of vertices. A question naturally arises as to how the influence of a team or group in a social network can be measured. Here, we propose a method of measuring this influence on a bipartite graph comprising vertices (individuals) and hyperedges (teams). When the hyperedge size varies, the number of shortest paths between two vertices in a hypergraph can be larger than that in a binary graph. Thus, the power-law behavior of the team BC distribution breaks down in scale-free hypergraphs. However, when the weight of each hyperedge, for example, the performance per team member, is counted, the team BC distribution is found to exhibit power-law behavior. We find that a team with a widely connected member is highly influential.
SDG's and Scholarly Communication: The Good, the Bad, and the Opportunities (for libraries)
Creators: name: Vandegrift, Micah
Publisher: name: Zenodo
Year: 2021
Subjects: open science
scholarly communication
Sustainable Development Goals

description: Slides for a presentation given at CISPC (Challenges in the Scholarly Publishing Cycle) 2021 webinar on the UN Sustainable Development Goals and Scholarly Communication. This presentation outlines a library perspective, and promotes a coalition-building program from the Association of Research Libraries.