cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Rhingia rostrata
Creators: name: MAZáNEK, Libor
name: VONIČKA, Pavel
name: PREISLER, JiřÍ
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Syrphidae
Rhingia
Rhingia rostrata

description: Rhingia rostrata (Linnaeus, 1758) Eurosibiřský druh, v současnosti velmi vzÁcný a sporadicky se vyskytujÍcÍ na světlinÁch v listnatých lesÍch a křovinÁch. Larvy se vyvÍjejÍ ve výkalech velkých kopytnÍků, zejména konÍ. OmezenÍm chovu konÍ se vysvětluje i současné mizenÍ tohoto druhu. Kořenov [16a]: 12.VI.2005, 1 ♀.
description: Published as part of MAZáNEK, Libor, VONIČKA, Pavel & PREISLER, JiřÍ, 2009, Syrphidae (Diptera) of the Jizerské hory Mts and Frýdlant region (northern Bohemia, Czech Republic), pp. 3-46 in Sborník Severočeského Muzea 27 on page 37, DOI: 10.5281/zenodo.7153554
Perseverance e Ingenuity ora anche formato Lego
Creators: Valentina Guglielmo
Publisher: name: Media Inaf
Year: 2023

Una chicca per collezionisti, ma anche per appassionati di spazio o futuri appassionati di missioni spaziali. Il Jpl della Nasa ha collaborato con l’azienda Lego per costruire i modellini di Perseverance e Ingenuity, che dall’inizio del 2021 stanno esplorando Marte alla ricerca di tracce di antica vita microbica
Revealing single-trap condensate fragmentation by measuring density-density correlations after time of flight
Creators: name: Kang, Myung-Kyun
name: Fischer, Uwe R.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider ultracold bosonic atoms in a single trap in the Thomas-Fermi regime, forming many-body states corresponding to stable macroscopically fragmented two-mode condensates. It is demonstrated that upon free expansion of the gas, the spatial dependence of the density-density correlations at late times provides a unique signature of fragmentation. This hallmark of fragmented condensate many-body states in a single trap is due to the fact that time of flight modifies the correlation signal such that two opposite %with respect to points in the expanding cloud become uncorrelated, in distinction to a nonfragmented Bose-Einstein condensate, where they remain correlated.
description: 5+6 pages of RevTex4-1, 2+2 figures
È del Grb di Capodanno il record di luminosità
Creators: Ufficio stampa Inaf
Publisher: name: Media Inaf
Year: 2023

Un articolo pubblicato oggi su Nature Astronomy descrive il lampo gamma Grb 220101A, il cui segnale – il più luminoso mai rilevato nelle bande ottiche – è stato osservato per la prima volta il primo gennaio del 2022. Fra gli autori dello studio c’è anche Stefano Covino dell’Istituto nazionale di astrofisica
Timescales of emulsion formation caused by anisotropic particles
Creators: name: Günther, Florian
name: Frijters, Stefan
name: Harting, Jens
Publisher: name: arXiv
Year: 2013
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Computational Physics (physics.comp-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Particle stabilized emulsions have received an enormous interest in the recent past, but our understanding of the dynamics of emulsion formation is still limited. For simple spherical particles, the time dependent growth of fluid domains is dominated by the formation of droplets, particle adsorption and coalescence of droplets (Ostwald ripening), which eventually can be almost fully blocked due to the presence of the particles. Ellipsoidal particles are known to be more efficient stabilizers of fluid interfaces than spherical particles and their anisotropic shape and the related additional rotational degrees of freedom have an impact on the dynamics of emulsion formation. In this paper, we investigate this point by means of simple model systems consisting of a single ellipsoidal particle or a particle ensemble at a flat interface as well as a particle ensemble at a spherical interface. By applying combined multicomponent lattice Boltzmann and molecular dynamics simulations we demonstrate that the anisotropic shape of ellipsoidal particles causes two additional timescales to be of relevance in the dynamics of emulsion formation: a relatively short timescale can be attributed to the adsorption of single particles and the involved rotation of particles towards the interface. As soon as the interface is jammed, however, capillary interactions between the particles cause a local reordering on very long timescales leading to a continuous change in the interface configuration and increase of interfacial area. This effect can be utilized to counteract the thermodynamic instability of particle stabilized emulsions and thus offers the possibility to produce emulsions with exceptional stability.
description: 14 pages, 14 figures
Volucella bombylans
Creators: name: MAZáNEK, Libor
name: VONIČKA, Pavel
name: PREISLER, JiřÍ
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Syrphidae
Volucella
Volucella bombylans

description: Volucella bombylans (Linnaeus, 1758) Holarktický druh, který se často vyskytuje na okrajových křovinÁch, světlinÁch a průsecÍch ve vlhkých lesÍch. Larvy žijÍ v hnÍzdech čmelÁků (Bombus spp.). Bílý Potok [1a]: 16.VI.2005, 1 ♂; 16.VI.-5.VII.2005, 1 ♀ (MT). Hejnice [9]: 19.VI.2007, 1 ♂. Jizerka [15b]: 20.VI.2007, 2 ♂♂, 1 ♀. Tichá říčka PP [44]: 8.VI.2004, 1 ♂ (SW); 2.-25.VI.2004, 3 ♀♀ (MT); 25.VI.-14.VII.2004, 1 ♂ (YPT), 2 ♂♂ (MT); 14.-30.VII.2004, 1 ♂ (MT). Zlatá Olešnice [49b]: 3.VI.2004, 1 ♂.
description: Published as part of MAZáNEK, Libor, VONIČKA, Pavel & PREISLER, JiřÍ, 2009, Syrphidae (Diptera) of the Jizerské hory Mts and Frýdlant region (northern Bohemia, Czech Republic), pp. 3-46 in Sborník Severočeského Muzea 27 on page 37, DOI: 10.5281/zenodo.7153554
Arriva Noos, il successore di Superquark
Creators: Redazione Media Inaf
Publisher: name: Media Inaf
Year: 2023

Ha inizio questa settimana la nuova serie in sei puntate di Rai Cultura dedicata alla divulgazione scientifica e ai diversi campi della conoscenza. Fra gli ospiti fissi del programma, ideato e condotto da Alberto Angela, ci sarà anche l’astronauta Samantha Cristoforetti. E uno spazio speciale sarà dedicato all’astrofisica grazie ai contributi di Edwige Pezzulli, ricercatrice Inaf, che illustrerà in ogni puntata le più belle immagini riprese dal telescopio James Webb
A performance evaluation approach for service providers under the integrated management system criteria
Creators: name: Cordero, Bernardo
name: Riofrío Romero, Nathaly
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 350715
subject: Quality management
classificationCode: 350505
subject: Occupational and workplace health and safety
classificationCode: 410404
subject: Environmental management
classificationCode: 460901
subject: Business process management
classificationCode: 350909
subject: Supply chains

description: This paper presents an innovative method for evaluating service provider performance through standards integration, including ISO 9001:2015, ISO 20400:2017, and ISO 45001:2018. It also presents a robust five-maturity framework designed to maximize effectiveness and establish essential indicators for supplier-buyer relationships. In addition, this paper emphasizes the critical role of sustainability in service contracting and draws on authoritative sources for performance assessment. Finally, the conclusions highlight the verification of qualitative variables through a case study, contributing to the knowledge base of sustainable development organizations.
A No-Go Theorem for Direct Collapse Black Holes Without a Strong Ultraviolet Background
Creators: name: Visbal, Eli
name: Haiman, Zoltan
name: Bryan, Greg L.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Explaining the existence of supermassive black holes (SMBHs) larger than $\sim 10^9 M_\odot$ at redshifts $z >\sim 6$ remains an open theoretical question. One possibility is that gas collapsing rapidly in pristine atomic cooling halos ($T_{\rm vir} >\sim 10^4 \rm{K}$) produces $10^4-10^6 M_\odot$ black holes. Previous studies have shown that the formation of such a black hole requires a strong UV background to prevent molecular hydrogen cooling and gas fragmentation. Recently it has been proposed that a high UV background may not be required for halos that accrete material extremely rapidly or for halos where gas cooling is delayed due to a high baryon-dark matter streaming velocity. In this work, we point out that building up a halo with $T_{\rm vir} >\sim 10^4 \rm{K}$ before molecular cooling becomes efficient is not sufficient for forming a direct collapse black hole (DCBH). Though molecular hydrogen formation may be delayed, it will eventually form at high densities leading to efficient cooling and fragmentation. The only obvious way that molecular cooling could be avoided in the absence of strong UV radiation, is for gas to reach high enough density to cause collisional dissociation of molecular hydrogen ($\sim 10^4 ~ {\rm cm}^{-3}$) before cooling occurs. However, we argue that the minimum core entropy, set by the entropy of the intergalactic medium (IGM) when it decouples from the CMB, prevents this from occurring for realistic halo masses. This is confirmed by hydrodynamical cosmological simulations without radiative cooling. We explain the maximum density versus halo mass in these simulations with simple entropy arguments. The low densities found suggest that DCBH formation indeed requires a strong UV background.
description: 5 pages, 5 figures, replaced with version accepted by MNRAS
Lifting divisors on a generic chain of loops
Creators: name: Cartwright, Dustin
name: Jensen, David
name: Payne, Sam
Publisher: name: arXiv
Year: 2014
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14T05, 14H51

description: Let C be a curve over a complete valued field with infinite residue field whose skeleton is a chain of loops with generic edge lengths. We prove that any divisor on the chain of loops that is rational over the value group lifts to a divisor of the same rank on C, confirming a conjecture of Cools, Draisma, Robeva, and the third author.
description: 14 pages, 3 figures v2: minor changes, to appear in Canadian Mathematical Bulletin
Aspettando l’Asteroid Day con Sorvegliati spaziali
Creators: Marco Malaspina
Publisher: name: Media Inaf
Year: 2023

Da lunedì 26 a venerdì 30 giugno, Giornata mondiale degli asteroidi, nella piazza coperta di Salaborsa, a Bologna, si terranno iniziative e incontri a cura di “Sorvegliati spaziali”. Ce ne parla la ricercatrice Inaf Daria Guidetti, ideatrice e coordinatrice del progetto
Scaling and tuning of EW and Higgs observables
Creators: name: Elias-Miro, Joan
name: Grojean, Christophe
name: Gupta, Rick S.
name: Marzocca, David
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study deformations of the SM via higher dimensional operators. In particular, we explicitly calculate the one-loop anomalous dimension matrix for 13 bosonic dimension-6 operators relevant for electroweak and Higgs physics. These scaling equations allow us to derive RG-induced bounds, stronger than the direct constraints, on a universal shift of the Higgs couplings and some anomalous triple gauge couplings by assuming no tuning at the scale of new physics, i.e. by requiring that their individual contributions to the running of other severely constrained observables, like the electroweak oblique parameters or $Γ(h \rightarrow γγ)$, do not exceed their experimental direct bounds. We also study operators involving the Higgs and gluon fields.
description: v2: 41 pages, 12 tables, 4 figures. Plots of the RG-induced bounds from S and T added, presentation of our approach in sections 2 and 4 improved, a few typos fixed, references added, conclusions and analysis unchanged. Version to appear in JHEP
Il Pianeta rosso in ultravioletti
Creators: Maura Sandri
Publisher: name: Media Inaf
Year: 2023

La missione Mars Atmosphere and Volatile Evolution (Maven) della Nasa – in particolare lo strumento Imaging Ultraviolet Spectrograph (Iuvis) a bordo del satellite – ha acquisito due nuove immagini ultraviolette di Marte, scattate nel luglio 2022 e nel gennaio 2023, quando il Pianeta rosso si trovava rispettivamente più vicino e più lontano dal Sole
Morphing composite cylindrical lattices with enhanced bending stiffness
Creators: name: Mc Hale, Ciaran
name: WEAVER, PAUL
Publisher: name: University of Limerick
Year: 2023
Subjects: Engineering

description: A key aspect in the design of deployable space structures comprising slender elements such as booms is their deployed bending stiffness. In space, due to zero gravitational loading, a high level of bending stiff?ness is not required to support neighbouring structures, but instead is desirable to resist vibrations generated by the attitude control system. The morphing composite cylindrical lattice that is under development is a structure with significant potential for deployable applications in space, however, concepts developed so far may lack sufficient bending stiffness. Therefore, current work focuses on developing a method of increasing the lattice bending stiffness, while minimising any increase in both mass and stowed volume. These goals are achieved by using additional composite strips mounted adjacent and concentric to pre-existing strips. These strips are attached using pre-existing fasteners, thus, only increasing the weight of the structure by the mass of the composite strips. A finite element model of the new lattice configuration is developed and validated by comparison to experimental results. For this comparison, three different lattice configurations were manufactured, two lattices with a conventional strip configuration, an eight-strip lattice and a four-strip lattice, and a third using a new lattice configuration developed in this work. In comparison with the eight-strip lattice, the new lattice configuration is 32% less stiff, however it weights 33% less and stows to pproximately half the stowed height. Compared to the four-strip lattice, the new configuration weighs 75% more, but it is 281% stiffer while stowing to the same volume. By increasing the deployed bending stiffness, this work makes the morphing cylindrical lattice a more viable candidate for deployable space structures.
Anche le stelle possono scontrarsi
Creators: Valentina Guglielmo
Publisher: name: Media Inaf
Year: 2023

Gli incidenti stellari avvengono, producono lampi di luce gamma e, probabilmente, anche onde gravitazionali. È quanto conclude uno studio che analizza un lampo di luce gamma lungo prodotto vicino al centro di una galassia vecchia, in una regione densissima di stelle e di moti caotici. Si tratta della prima conferma osservativa di un fenomeno a lungo teorizzato
La gravità quantistica potrebbe rallentare i neutrini
Creators: Maura Sandri
Publisher: name: Media Inaf
Year: 2023

Uno studio pubblicato su Nature Astronomy esamina un modello di gravità quantistica in cui la velocità di particelle ultrarelativistiche diminuisce al crescere dell’energia. L'indagine ha utilizzato lampi gamma visti da Fermi e neutrini ad altissima energia rilevati da IceCube, verificando l'ipotesi che alcuni neutrini e alcuni lampi gamma possano avere un'origine comune, sebbene osservati in momenti diversi
Cinque esperimenti per la prossima eclissi solare
Creators: Jacopo Danieli
Publisher: name: Media Inaf
Year: 2023

Lo straordinario evento dell’eclissi di Sole non suscita solo meraviglia, ma consente ancora oggi ai ricercatori di effettuare nuovi e interessanti studi. Oggi come un secolo fa. Nel 1919 permise di ottenere la prima prova della teoria della relatività generale di Einstein. Per quella che sarà visibile ad aprile dell’anno prossimo nel Nord America, la Nasa ha già selezionato alcuni esperimenti per studiare in modo unico il Sole e i suoi effetti sul nostro pianeta
Il mistero delle Geminidi
Creators: Albino Carbognani
Publisher: name: Media Inaf
Year: 2023

Lo sciame di meteore delle Geminidi è associato all’asteroide (3200) Phaethon, ma la massa dei meteoroidi della corrente è superiore a quella che può essere emesso dalla superficie dell'asteroide in seguito ai processi che permetterebbero l’espulsione di meteoroidi nello spazio. Per questo motivo si esplorano modalità di formazione alternative, come quella della collisione. Il punto della situazione
Exclusive vector meson production at high energies and gluon saturation
Creators: name: Armesto, Néstor
name: Rezaeian, Amir H.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We systematically study exclusive diffractive (photo) production of vector mesons ($J/ψ$, $ψ(2s)$, $ϕ$ and $ρ$) off protons in high-energy collisions and investigate whether the production is a sensitive probe of gluon saturation. We confront saturation-based results for diffractive $ψ(2s)$ and $ρ$ production at HERA and $J/ψ$ photoproduction with all available data including recent ones from HERA, ALICE and LHCb, finding good agreement. In particular, we show that the $t$-distribution of differential cross sections of photoproduction of vector mesons offers a unique opportunity to discriminate among saturation and non-saturation models. This is due to the emergence of a pronounced dip (or multiple dips) in the $t$-distribution of diffractive photoproduction of vector mesons at relatively large, but potentially accessible $|t|$ that can be traced back to the unitarity features of colour dipole amplitude in the saturation regime. We show that in saturation models the dips in $t$-distribution recede towards lower $|t|$ with decreasing mass of the vector meson, increasing energy or decreasing Bjorken-$x$, and decreasing virtuality $Q$. We provide various predictions for exclusive (photo) production of different vector mesons including the ratio of $ψ(2s)/J/ψ$ at HERA, the LHC, and future colliders.
description: 20 pages, 24 figures; v3: the old LHCb data replaced with updated 2014 data, ALICE preliminary data added for the comparison, all results and predictions unchanged, 10 new plots added, more predictions, discussions and references added. The version to appear in PRD
Anomalia nell’interferenza quantistica
Creators: Rossella Spiga
Publisher: name: Media Inaf
Year: 2023

Un comportamento inaspettato che mette in discussione la nostra comprensione dell'interferenza multi-particellare nella zona grigia tra bosoni e particelle classiche è al centro di uno studio, guidato dall'Università di Bruxelles, recentemente pubblicato su Nature Photonics. Sono interessanti i risvolti possibili per lo sviluppo dei computer quantistici
Einstein ed Eulero messi alla prova
Creators: Maura Sandri
Publisher: name: Media Inaf
Year: 2023

Due scoperte stanno mettendo duramente alla prova le leggi della fisica: l'accelerazione nell'espansione dell'universo e l'esistenza della materia oscura. Questi misteriosi fenomeni obbediscono alle equazioni di Einstein ed Eulero? Due ricercatori dell'Università di Ginevra hanno sviluppato un metodo per scoprirlo, considerando una misura mai usata prima: la distorsione temporale
Duecento anni fa il buco nero centrale s’è svegliato
Creators: Ufficio stampa Inaf
Publisher: name: Media Inaf
Year: 2023

Stando ai dati raccolti dal telescopio spaziale Ixpe della Nasa, Sagittarius A* – il buco nero supermassiccio al centro della nostra galassia, con una massa stimata pari a milioni di volte quella del Sole – si sarebbe svegliato solo all’inizio del 19secolo secolo per divorare gas e altri detriti cosmici che si trovavano nei suoi dintorni. Lo studio che descrive la scoperta è stato pubblicato oggi su Nature
Covert Optical Communication
Creators: name: Bash, Boulat A.
name: Gheorghe, Andrei H.
name: Patel, Monika
name: Habif, Jonathan
name: Goeckel, Dennis
name: Towsley, Don
name: Guha, Saikat
Publisher: name: arXiv
Year: 2014
Subjects: subject: Information Theory (cs.IT)
subject: Quantum Physics (quant-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Encryption prevents unauthorized decoding, but does not ensure stealth---a security demand that a mere presence of a message be undetectable. We characterize the ultimate limit of covert communication that is secure against the most powerful physically-permissible adversary. We show that, although it is impossible over a pure-loss channel, covert communication is attainable in the presence of any excess noise, such as a $300$K thermal blackbody. In this case, $\mathcal{O}(\sqrt{n})$ bits can be transmitted reliably and covertly in $n$ optical modes using standard optical communication equipment. The all-powerful adversary may intercept all transmitted photons not received by the intended receiver, and employ arbitrary quantum memory and measurements. Conversely, we show that this square root scaling cannot be outperformed. We corroborate our theory in a proof-of-concept experiment. We believe that our findings will enable practical realizations of covert communication and sensing, both for point-to-point and networked scenarios.
description: v4: improved organization and figures, no changes to the results; v3: significant changes, included new theoretical results as well as re-organized; v2: updated figure 3 with theoretical channel capacity curves + minor fixes, no changes to experiments or other main results
Tre scatti per il terzo flyby di BepiColombo
Creators: Giuseppe Fiasconaro
Publisher: name: Media Inaf
Year: 2023

Ce le avevano promesse ed eccole qua: sono le prime tre immagini di Mercurio scattate dalla sonda BepiColombo. Testimoniano il successo del terzo dei sei sorvoli necessari alla sonda per entrare, entro il 2025, nell’orbita del pianeta
Trappist-1 c, una super-Terra nuda
Creators: Giuseppe Fiasconaro
Publisher: name: Media Inaf
Year: 2023

Utilizzando lo strumento Miri di James Webb, un team di ricercatori guidati dal Max Planck Institute for Astronomy ha studiato Trappist1- c, uno dei sette pianeti rocciosi che orbitano attorno alla stella nana Trappist-1. Le indagini, condotte osservando il sistema planetario durante alcune eclissi secondarie, suggeriscono che il pianeta sia privo di atmosfera. E se anche l’avesse sarebbe estremamente sottile
Euclid, lancio in calendario per sabato primo luglio
Creators: Valentina Guglielmo
Publisher: name: Media Inaf
Year: 2023

Euclid – il telescopio spaziale per lo studio dell’universo oscuro – partirà da Cape Canaveral sabato 1° luglio, a bordo di un razzo Falcon 9 di SpaceX. Lo ha comunicato oggi l’Agenzia spaziale europea con un tweet. Nel frattempo, le operazioni di rifornimento sono state concluse con successo
Volucella inflata
Creators: name: MAZáNEK, Libor
name: VONIČKA, Pavel
name: PREISLER, JiřÍ
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Syrphidae
Volucella
Volucella inflata

description: Volucella inflata (Fabricius, 1794) ČS: CR Evropský, převÁžně lesnÍ druh, který v celém svém areÁlu v současnosti přežÍvÁ již pouze lokÁlně. Dnes již extrémně vzÁcný druh se vyskytoval v přirozených lužnÍch lesÍch a teplomilných doubravÁch s dostatečným zastoupenÍm přestÁrlých a odumÍrajÍcÍch listnatých stromů napadených již jiným saproxylickým hmyzem. Saproxylické larvy byly opakovaně nalezeny v chodbičkÁch drvopleňů (Cossus spp.) ve starých dubech (Quercus spp.). Jeho nÁlez doklÁdÁ, že v ČechÁch tento druh dosud nevyhynul. Meandry Smědé PR [22c]: 1.-25.VII.2007, 1 ♀ (BT).
description: Published as part of MAZáNEK, Libor, VONIČKA, Pavel & PREISLER, JiřÍ, 2009, Syrphidae (Diptera) of the Jizerské hory Mts and Frýdlant region (northern Bohemia, Czech Republic), pp. 3-46 in Sborník Severočeského Muzea 27 on page 37, DOI: 10.5281/zenodo.7153554
Phenomenology of the 3-3-1-1 model
Creators: name: Dong, P. V.
name: Huong, D. T.
name: Queiroz, Farinaldo S.
name: Thuy, N. T.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We discuss a new SU(3)_C X SU(3)_L X U(1)_X X U(1)_N (3-3-1-1) gauge model that overhauls the theoretical and phenomenological aspects of the known 3-3-1 models. Additionally, we sift the outcome of the 3-3-1-1 model from precise electroweak bounds to dark matter observables. The mass spectra of the scalar and gauge sectors are diagonalized when the scale of the 3-3-1-1 breaking is compatible to that of the ordinary 3-3-1 breaking. All the interactions of the gauge bosons with the fermions and scalars are obtained. The 3-3-1-1 model provides two dark matters which are stabilized by the W-parity conservation: one fermion which may be either a Majorana or Dirac fermion and one complex scalar. We conclude that in the fermion dark matter setup the Z_2 gauge boson resonance sets the dark matter observables, whereas in the scalar one the Higgs portal dictates them. The standard model GIM mechanism works in the model because of the W-parity conservation. Hence, the dangerous flavor changing neutral currents due to the ordinary and exotic quark mixing are suppressed, while those coming from the non-universal couplings of the Z_2 and Z_N gauge bosons are easily evaded. Indeed, the K^0-\bar{K}^0 and B^0_s-\bar{B}^0_s mixings limit m_{Z_{2,N}}>2.037 TeV and m_{Z_{2,N}}>2.291 TeV, respectively, while the LEPII searches provide a quite close bound m_{Z_{2,N}}>2.737 TeV. The violation of the CKM unitarity due to the loop effects of the Z_2 and Z_N gauge bosons is negligible. [Full abstract is given in the text.]
description: 57 pages, 11 figures, 13 tables; mixing effects and CKM unitarity violation discussed; FCNCs, dark matter observables, LEPII searches, presentation and english improved; version to appear in Physical Review D
The geometry behind double geometry
Creators: name: Cederwall, Martin
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Generalised diffeomorphisms in double field theory rely on an O(d,d) structure defined on tangent space. We show that any (pseudo-)Riemannian metric on the doubled space defines such a structure, in the sense that the generalised diffeomorphisms defined using such a metric form an algebra, provided a covariant section condition is fulfilled. Consistent solutions of the section condition gives further restrictions. The case previously considered corresponds to a flat metric. The construction makes it possible to apply double geometry to a larger class of manifolds. Examples of curved defining metrics are given. We also comment on the role of the defining geometry for the symmetries of double field theory, and on the continuation of the present construction to the U-duality setting.
description: 8 pp., plain tex. v2: Slightly expanded motivation and discussion parts
Holographic interaction effects on transport in Dirac semimetals
Creators: name: Jacobs, V. P. J.
name: Vandoren, S. J. G.
name: Stoof, H. T. C.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Strongly interacting Dirac semimetals are investigated using a holographic model especially geared to compute the single-particle correlation function for this case, including both interaction effects and nonzero temperature. We calculate the (homogeneous) electrical conductivity at zero chemical potential, and show that it consists of two contributions. The interband contribution scales as a power law either in frequency or in temperature for low frequency. The precise power is related to a critical exponent of the dual holographic theory, which is a parameter in the model. On top of that we find for nonzero temperatures a Drude peak corresponding to intraband transitions. A behavior similar to Coulomb interactions is recovered as a special limiting case.
description: Published version, with additional discussion on inter- and intraband contributions and Drude peak. 7 pages, 5 figures
Thermodynamic costs of information processing in sensory adaption
Creators: name: Sartori, Pablo
name: Granger, Léo
name: Lee, Chiu Fan
name: Horowitz, Jordan M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Biological Physics (physics.bio-ph)
subject: Molecular Networks (q-bio.MN)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: Biological sensory systems react to changes in their surroundings. They are characterized by fast response and slow adaptation to varying environmental cues. Insofar as sensory adaptive systems map environmental changes to changes of their internal degrees of freedom, they can be regarded as computational devices manipulating information. Landauer established that information is ultimately physical, and its manipulation subject to the entropic and energetic bounds of thermodynamics. Thus the fundamental costs of biological sensory adaptation can be elucidated by tracking how the information the system has about its environment is altered. These bounds are particularly relevant for small organisms, which unlike everyday computers operate at very low energies. In this paper, we establish a general framework for the thermodynamics of information processing in sensing. With it, we quantify how during sensory adaptation information about the past is erased, while information about the present is gathered. This process produces entropy larger than the amount of old information erased and has an energetic cost bounded by the amount of new information written to memory. We apply these principles to the E. coli's chemotaxis pathway during binary ligand concentration changes. In this regime, we quantify the amount of information stored by each methyl group and show that receptors consume energy in the range of the information-theoretic minimum. Our work provides a basis for further inquiries into more complex phenomena, such as gradient sensing and frequency response.
description: 17 pages, 6 figures
Scenario for delocalization in translation invariant systems
Creators: name: De Roeck, Wojciech
name: Huveneers, Francois
Publisher: name: arXiv
Year: 2014
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We investigate the possibility of Many-Body Localization in translation invariant Hamiltonian systems, which was recently brought up by several authors. A key feature of Many-Body Localized disordered systems is recovered, namely the fact that resonant spots are rare and far-between. However, we point out that resonant spots are mobile, unlike in models with strong quenched disorder, and that these mobile spots constitute a possible mechanism for delocalization, albeit possibly only on very long timescales. In some models, this argument for delocalization can be made very explicit in first order of perturbation theory in the hopping. For models where this does not work, we present instead a non-perturbative argument that relies solely on ergodicity inside the resonant spots.
description: v3 --> v4. Small changes requested by referees: Extended conclusion section, moved technical parts into appendix, minor change in title. The manuscript is now accepted in PRB
Volucella pellucens
Creators: name: MAZáNEK, Libor
name: VONIČKA, Pavel
name: PREISLER, JiřÍ
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Syrphidae
Volucella
Volucella pellucens

description: Volucella pellucens (Linnaeus, 1758) LiterÁrnÍ údaje: Hala Izerska (Rašeliniště Jizery - Bańkowska 1964). Široce rozšÍřený palearktický druh, zasahujÍcÍ i do orientÁlnÍ oblasti. Je nejhojnějšÍm druhem rodu. VyhledÁvÁ nejrůznějšÍ osluněnÁ mÍsta dostatečně chrÁněnÁ vzrostlými dřevinami. Larvy se vyvÍjejÍ v hnÍzdech vos (Vespula spp.). Bílý Potok [1a]: 16.VI.2005, 1 ♂; 5.-29.VII.2005, 1 ♂ (MT), 1 ♀ (YPT); [1d]: 17.VI.2007, 1 ♀, 19.VI.2007, 1 ♀. Bukovec PR [3a]: 16.VI.2007, 3 ♀♀. Jedlový důl PR [14]: 6.-28.VII.2005, 1 ♀ (YPT). Jizerka [15b]: 20.VI.2007, 1 ♀. Rašeliniště Jizerky NPR [33b]: 20.VI.2007, 1 ♀. Rybí loučky PR [37]: 23.VII.-5.VIII.2003, 1 ♂, 1 ♀ (YPT). Smědava [38]: 20.VI.2007, 1 ♀. Štolpichy [42]: 22.VI.2007, 1 ♂, 3 ♀♀. Tichá říčka PP [44]: 2.-25.VI.2004, 1 ♂ (YPT), 1 ♂ (MT); 14.-30.VII.2004, 1 ♀ (MT); 14.-29.VIII.2004, 1 ♀ (YPT). Tišina [45]: 18.VI.2007, 1 ♂. Vápenný vrch PR [48]: 21.VI.2007, 1 ♂.
description: Published as part of MAZáNEK, Libor, VONIČKA, Pavel & PREISLER, JiřÍ, 2009, Syrphidae (Diptera) of the Jizerské hory Mts and Frýdlant region (northern Bohemia, Czech Republic), pp. 3-46 in Sborník Severočeského Muzea 27 on page 38, DOI: 10.5281/zenodo.7153554
description: {"references": ["BANKOWSKA R. 1964: Syrphidae (Diptera) Sudetow. (Syrphidae (Diptera) of the Sudety Mts.). Fragmenta Faunistica, Warszava, 11: 287 - 318 (in Polish, English and Russian abstr.)."]}
title: Dr. med. Franz Hermann Keller-Göttisheim
title: 13. Januar 1858 - 25. Juni 1930, Arzt in Rheinfelden
titleType: Subtitle
title: Ansprachen, gehalten an der Trauerfeier, am 27. Juni 1930, im Waldfriedhof in Rheinfelden
titleType: Subtitle
Creators: name: Pettermand, Ami Constant
name: Beethschen, B.
name: Roniger, Adolf
name: Kern, D.
name: Wanner, F.
name: Immenhauser, Gottfried
name: Flubacher, T.
name: Anet, Kennedy
Publisher: name: Buchdruckerei U. Herzog
Year: 1930
Subjects: subject: 610 Medizin und Gesundheit
subject: 920 Biografien, Genealogie, Insignien
subject: Nachruf
subject: Keller, Hermann
subject: Endingen
subject: Zürich
subject: Rheinfelden (Aargau)

description: Inhalt: Nachruf von Herrn Alt-Pfarrer A. C. Pettermand, Basel ; Ansprache von Herrn Stadtammann Dr. B. Beetschen, Rheinfelden ; Ansprache von Herrn Dir. Ad. Roniger, Präsident der Badkommission des Sanatoriums Rheinfelden ; Ansprache von Herrn Bez. Arzt Dr. D. Kern, Rheinfelden ; Ansprache von Herrn Dr. F. Wanner, Lausanne, Präsident der schweiz. Gesellschaft für Balneologie und Klimatologie ; Abschiedsgruß von Oberst Immenhauser, Bern, als Vertreter des Korps Helvetia (Zürich) ; Ansprache von Herrn T. Flubacher, Basel ; Une belle figure de médecin, le Dr. H. Keller de Rheinfelden (Suisse) par Kennedy Anet, Bruxelles
description: Verzeichnis der wichtigsten Publikationen von Dr. H. Keller
Fano stability diagram of a symmetric triple quantum dot
Creators: name: Niklas, Michael
name: Trottmann, Andreas
name: Donarini, Andrea
name: Grifoni, Milena
Publisher: name: Universität Regensburg
Year: 2016
Subjects: subject: 530 Physik
subject: 73.23.Hk
subject: 73.63.Kv

description: The Fano factor stability diagram of a C3v symmetric triangular quantum dot is analysed for increasing electron fillings N. At low filling, conventional Poissonian and sub-Poissonian behavior, caused by the interplay of electron-electron interactions and Fermi statistics, is found. At larger filling, N ≥ 2, super-Poissonian noise and a peculiar bias voltage dependence of the Fano factor are observed at Coulomb and interference blockade. An analysis of the Fano map unravels a nontrivial electron bunching mechanism arising from the presence of degenerate many-body states combined with orbital interference and Coulomb interactions.
Pulsar che non sono stelle di neutroni
Creators: Marco Malaspina
Publisher: name: Media Inaf
Year: 2023

La scoperta di un raro tipo di nana bianca rotante in un sistema stellare binario – è solo il secondo esemplare di questo tipo a oggi conosciuto – fornisce nuovi indizi per comprendere il ruolo dei campi magnetici nell’evoluzione stellare. Lo studio, pubblicato su Nature Astronomy, è guidato da Ingrid Pelisoli dell’Università di Warwick
Universal Polar Codes for More Capable and Less Noisy Channels and Sources
Creators: name: Sutter, David
name: Renes, Joseph M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: We prove two results on the universality of polar codes for source coding and channel communication. First, we show that for any polar code built for a source $P_{X,Z}$ there exists a slightly modified polar code - having the same rate, the same encoding and decoding complexity and the same error rate - that is universal for every source $P_{X,Y}$ when using successive cancellation decoding, at least when the channel $P_{Y|X}$ is more capable than $P_{Z|X}$ and $P_X$ is such that it maximizes $I(X;Y) - I(X;Z)$ for the given channels $P_{Y|X}$ and $P_{Z|X}$. This result extends to channel coding for discrete memoryless channels. Second, we prove that polar codes using successive cancellation decoding are universal for less noisy discrete memoryless channels.
description: 10 pages, 3 figures
Lensing Model of MACS J1149.5+2223 - I. Cluster mass reconstruction
Creators: name: Rau, Stefan
name: Vegetti, Simona
name: White, Simon D. M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Measurements of the total logarithmic central slope of the mass profile in galaxy clusters constrain their evolution and assembly history and that of their brightest cluster galaxies. We report the first full surface brightness distribution modelling of the inner region of the galaxy cluster MACS J1149.5+2223. We compare these results with a position-based modelling approach for which we employ more than twice the previously known positional constraints. This is the first time that the detailed lensed image configuration of two non-central cluster galaxies with Einstein rings has been mapped. Due to the extended radial coverage provided by the multiple images in this system, we are able to determine the slope $\partial \log{ κ}/\partial \log{R} = -0.33$ of the total projected mass distribution from $8$ to $80~\mathrm{kpc}$. This is within the cluster-to-cluster scatter estimates from previous cluster measurements. Our reconstruction of the image surface brightness distribution of the large central spiral galaxy has a root mean square residual for all image pixels of $1.14~σ$, where $σ$ is the observational background noise. This corresponds to a reconstruction of the positions of bright clumps in the central galaxy with an rms of $0.063~\mathrm{arcsec}$.
description: 13 pages, 9 figures, 2 tables, published in MNRAS
Blera fallax
Creators: name: MAZáNEK, Libor
name: VONIČKA, Pavel
name: PREISLER, JiřÍ
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Syrphidae
Blera
Blera fallax

description: Blera fallax (Linnaeus, 1758) Transpalearktický druh s boreÁlnÍm rozšÍřenÍm. Vyskytuje se dosud dosti pravidelně, často i v okolÍ vzrostlých kulturnÍch smrčin, indikuje však zachovalejšÍ lesnÍ komplexy s přestÁrlými a poraněnými stromy. Larvy se vyvÍjejÍ v mokré dřevnÍ drti starých, popř. poraněných jehličnatých stromů. Bílý Potok [1e]: 17.VI.2007, 1 ♂. Bukovec PR [3a]: 16.VI.2007, 3 ♂♂, 1 ♀; [3d]: 21.VI.2006, 1 ♀ (SW). Černousy [6a]: 14.V.-14.VI.2007, 1 ♀ (MT). Kořenov [16a]: 18.VI.2005, 1 ♂. Špičák [41]: 28.VI.2005, 1 ♂ (SW). Štolpichy [42]: 16.VI.2005, 1 ♂; 22.VI.2007, 1 ♂, 1 ♀. Tichá říčka PP [44]: 2.-25.VI.2004, 1 ♀ (MT). U Kyselky [46]: 20.VI.-13.VII.2006, 1 ♂ (MT).
description: Published as part of MAZáNEK, Libor, VONIČKA, Pavel & PREISLER, JiřÍ, 2009, Syrphidae (Diptera) of the Jizerské hory Mts and Frýdlant region (northern Bohemia, Czech Republic), pp. 3-46 in Sborník Severočeského Muzea 27 on page 38, DOI: 10.5281/zenodo.7153554
Fine-structured large deviations and the fluctuation theorem: Molecular motors and beyond
Creators: name: Pietzonka, Patrick
name: Zimmermann, Eva
name: Seifert, Udo
Publisher: name: arXiv
Year: 2014
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Biomolecules (q-bio.BM)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: By considering subexponential contributions in large deviation theory, we determine the fine structure in the probability distribution of the observable displacement of a bead coupled to a molecular motor. More generally, for any stochastic motion along a periodic substrate, this approach reveals a discrete symmetry of this distribution for which hidden degrees of freedom lead to a periodic modulation of the slope typically associated with the fluctuation theorem. Contrary to previous interpretations of experimental data, the mean force exerted by a molecular motor is unrelated to the long-time asymptotics of this slope and must rather be extracted from its short-time limit.
description: 6 pages, 5 figures
Sustainability and Consumer Education on Food Sustainability
Creators: name: Moeti, Itumeleng Thandile
Publisher: name: London South Bank University
Year: 2022

description: In order to minimise food waste, there needs to be significant change at all stages of food production and consumption. Household food waste makes up 70% of all food waste in the UK. 65% of this food waste is avoidable, but significant changes in consumer shopping and household food management behaviours are necessary. Whilst consumer awareness of sustainability is rising, it does not always translate into action by consumers to implement sustainable practices in their lives. The food sustainability and sustainability awareness survey found that consumers are eager to live more sustainably, however lack of education and a disconnect between their actions and behaviour inhibits sustainable practice. Consumers need to learn how to approach sustainability holistically and understand the connection between their daily actions and climate change. Personal, social and financial barriers each contribute to how individuals approach sustainability, financial barriers being the biggest barrier to green consumerism. The majority of consumers feel a responsibility to be more sustainable, however they also believe the weight of the environmental crisis and sourcing solutions should be placed on the food production sector and governments. The survey also revealed that there is an interest in educational resources on managing household food waste, food sustainability and climate change. Informal education avenues such as educating on food sustainability online or on urban farms show promise. Urban farms and community gardens provide idyllic spaces to educate on food sustainability, along with feeding local communities, creating employment and fostering community spirit.
BepiColombo a 236 km da Mercurio
Creators: Giuseppe Fiasconaro
Publisher: name: Media Inaf
Year: 2023

La sonda Esa/Jaxa BepiColombo si prepara al terzo dei sei sorvoli di Mercurio necessari per rallentare la sua corsa e inserirsi, entro dicembre 2025, nell'orbita del pianeta. L'incontro, che avverrà con il lato non illuminato del pianeta, è previsto per questa sera, lunedì 19 giugno. La minima distanza dal pianeta, circa 236 km, sarà raggiunta alle 21 e 34 ora italiana
Deep Sensing: al Meet la radioastronomia si fa arte
Creators: Redazione Media Inaf
Publisher: name: Media Inaf
Year: 2023

Deep Sensing è un’opera d'arte immersiva – realizzata da Rasa Šmite e Raitis Šmits, una coppia di artisti del Rixc di Riga – basata sulla sonificazione di dati astronomici e che prende spunto dallo storico radiotelescopio RT-32 di Irbene, nella Lettonia occidentale. All’opening – in calendario a Milano, al Meet Digital Culture Center, giovedì 22 giugno – interverranno, insieme agli artisti, la fondatrice e presidente di Meet, Maria Grazia Mattei, e l’astrofisica Patrizia Caraveo
L’inferno di Fu Orionis
Creators: Maura Sandri
Publisher: name: Media Inaf
Year: 2023

Un nuovo processo astrofisico chiamato "evaporazione estrema", che coinvolge giovani pianeti giganti gassosi in dischi protoplanetari, potrebbe spiegare l’aumento di luminosità osservato 85 anni fa in Fu Orionis. Come una stella secondaria nelle binarie a trasferimento di massa, il pianeta diventa la sorgente dominante di materia per la stella, provocando intensi brillamenti stellari. Tutti i dettagli su Mnras
title: Green power generation and the evolution of the Chinese electricity industry, 1880 to the present
Creators: name: Shi, Lin
Publisher: name: University of Glasgow
Year: 2023

description: Climate change urgently calls for fundamental changes in the way we generate electricity. As the world’s largest electricity generator and the biggest greenhouse gas emitter, China has pledged to decarbonise its power system. The success or failure of its efforts to rapidly accelerate the deployment of renewables will have immense implications for the global green transition. How might China meet its energy needs using green energies? This is the question this thesis takes up. This thesis uses mixed methods to address change through time as means to understand where China is now in terms of energy and where it might go next. This thesis begins by applying Hughes’s system approach to investigate the evolution of China’s power system from its origins in the 1880s to the current green transition. The findings show that the Chinese power system originated in wars, was built by the Western-educated elites, embedded with the socialist-style gained from Soviet assistance, and directed by the central state’s political and economic principles. As a late developer, the case of China indicates the importance of human capital and that political, economic and educational openness are necessary conditions for late development. The thesis then focuses on the subnational political economy of the power system’s green transition through an in-depth case study. The findings of a neo-Gramscian analysis demonstrate the dynamic processes and evolving power relations of the local electricity industry’s green transition. The results point out that the rivalling coalitions of distinct economic interests – the established coalfired power historical bloc and the young renewable energy firms – were particularly central to the process. The final themed chapter examines whether it paid to adopt renewable energies in Chinese electricity generation firms from 2005 to 2017. The quantitative results show that adopting renewable energy positively impacts corporate profitability. Profitability is more stable and increases faster in firms with a higher share of renewable energies. Qualitative investigations reveal that the state-owned generators now strive for profits rather than scale, and private generators prioritise innovation and political prestige over profitability.
Full-counting statistics of time-dependent conductors
Creators: name: Benito, Mónica
name: Niklas, Michael
name: Kohler, Sigmund
Publisher: name: Universität Regensburg
Year: 2016
Subjects: subject: 530 Physik
subject: 05.60.Gg
subject: 42.50.Lc
subject: 73.23.Hk

description: We develop a scheme for the computation of the full-counting statistics of transport described by Markovian master equations with an arbitrary time dependence. It is based on a hierarchy of generalized density operators, where the trace of each operator yields one cumulant. This direct relation offers a better numerical efficiency than the equivalent number-resolved master equation. The proposed method is particularly useful for conductors with an elaborate time dependence stemming, e.g., from pulses or combinations of slow and fast parameter switching. As a test bench for the evaluation of the numerical stability, we consider time-independent problems for which the full-counting statistics can be computed by other means. As applications, we study cumulants of higher order for two time-dependent transport problems of recent interest, namely steady-state coherent transfer by adiabatic passage (CTAP) and Landau-Zener-Stückelberg-Majorana (LZSM) interference in an open double quantum dot.