cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Modeling the Evolution of Silicate/Volatile Accretion Discs around White Dwarfs
Creators: name: Okuya, Ayaka
name: Ida, Shigeru
name: Hyodo, Ryuki
name: Okuzumi, Satoshi
Publisher: name: arXiv
Year: 2022
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: A growing number of debris discs have been detected around metal-polluted white dwarfs. They are thought to be originated from tidally disrupted exoplanetary bodies and responsible for metal accretion onto host WDs. To explain (1) the observationally inferred accretion rate higher than that induced by Poynting-Robertson drag, $\dot{M}_{\rm PR}$, and (2) refractory-rich photosphere composition indicating the accretion of terrestrial rocky materials, previous studies proposed runaway accretion of silicate particles due to gas drag by the increasing silicate vapor produced by the sublimation of the particles. Because re-condensation of the vapor diffused beyond the sublimation line was neglected, we revisit this problem by one-dimensional advection/diffusion simulation that consistently incorporates silicate sublimation/condensation and back-reaction to particle drift due to gas drag in the solid-rich disc. We find that the silicate vapor density in the region overlapping the solid particles follows the saturating vapor pressure and that no runaway accretion occurs if the re-condensation is included. This always limits the accretion rate from mono-compositional silicate discs to $\dot{M}_{\rm PR}$ in the equilibrium state. Alternatively, by performing additional simulations that couple the volatile gas (e.g., water vapor), we demonstrate that the volatile gas enhances the silicate accretion to $>\dot{M}_{\rm PR}$ through gas drag. The refractory-rich accretion is simultaneously reproduced when the initial volatile fraction of disc is $\lesssim 10$ wt\% because of the suppression of volatile accretion due to the efficient back-reaction of solid to gas. The discs originating from C-type asteroid analogs might be a possible clue to the high-$\dot{M}$ puzzle.
description: 20 pages, 14 figures, accepted for publication in MNRAS
The trap in the early Universe: impact on the interplay between gravitational waves and LHC physics in the 2HDM
Creators: name: Biekötter, Thomas
name: Heinemeyer, Sven
name: No, José Miguel
name: Olea-Romacho, María Olalla
name: Weiglein, Georg
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We analyze the thermal history of the 2HDM and determine the parameter regions featuring a first-order electroweak phase transition (FOEWPT) and also much less studied phenomena like high-temperature electroweak (EW) symmetry non-restoration and the possibility of vacuum trapping (i.e. the Universe remains trapped in an EW-symmetric vacuum throughout the cosmological evolution, despite at $T=0$ the EW breaking vacuum is deeper). We show that the presence of vacuum trapping impedes a first-order EW phase transition in 2HDM parameter-space regions previously considered suitable for the realization of electroweak baryogenesis. Focusing then on the regions that do feature such a first-order transition, we show that the 2HDM parameter space that would yield a stochastic gravitational wave signal potentially detectable by the future LISA observatory is very contrived, and will be well probed by direct searches of 2HDM Higgs bosons at the HL-LHC, and (possibly) also via measurements of the self-coupling of the Higgs boson at 125 GeV. This has an important impact on the interplay between LISA and the LHC regarding the exploration of first-order phase transition scenarios in the 2HDM: the absence of new physics indications at the HL-LHC would severely limit the prospects of a detection by LISA. Finally, we demonstrate that as a consequence of the predicted enhancement of the self-coupling of the Higgs boson at 125 GeV the ILC would be able to probe the majority of the 2HDM parameter space yielding a FOEWPT through measurements of the self-coupling, with a large improvement in precision with respect to the HL-LHC.
description: 41 pages, 13 figures
Mathematical Modeling of the Weaving Structure Design
Creators: name: Yordzhev, Krasimir
name: Kostadinova, Hristina
Publisher: name: arXiv
Year: 2012
Subjects: subject: Representation Theory (math.RT)
subject: Data Structures and Algorithms (cs.DS)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 15B34, 05A05, 93A30, 68W40

description: An equivalence relation in the set of all square binary matrices is described in this work. It is discussed a combinatoric problem about finding the cardinal number and the elements of the factor set according to this relation. We examine the possibility to get some special elements of this factor set. We propose an algorithm, which solves these problems. The results we have received are used to describe the topology of the different weaving structures.
description: Proceedings of the Thirty Ninth Spring Conference of the Union of Bulgarian Mathematicians, Albena, April 6-10, 2010
Semiampleness for generalized pairs
Creators: name: Chaudhuri, Priyankur
Publisher: name: arXiv
Year: 2022
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14E30

description: We prove that if $(X, B+\mathbf{M})$ is a generalized klt pair with $K_X+B+\mathbf{M}_X$ nef and abundant, then $K_X+B+\mathbf{M}_X$ is semiample. More generally, we prove a generalized basepoint free theorem for generalized klt pairs.
description: New corollary added to the previous version. No other changes. Comments welcome
Mixing It Up With MT2: Unbiased Mass Measurements at Hadron Colliders
Creators: name: Curtin, David
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Recently, much progress has been made on techniques to measure the masses of new particles with partially-invisible decays at a hadron collider. We examine for the first time the realistic application of MT2-based measurement methods to a fully hadronic final state from a symmetric two-step decay chain with maximal combinatorial uncertainty. Several problems arise in such an analysis: the MT2 variables are powerful but fragile, with shallow edges that are easily washed out or faked by ubiquitous combinatorics background. Traditional methods of both cleaning up the distribution and determining edge position can fail badly. To perform successful mass measurements we introduce several new techniques: the Edge-to-Bump method of extracting an edge from a distribution by analyzing a distribution of fits rather than a single fit; a very simple yet high-yield method for determining decay-chain assignments event-by-event; and a systematic procedure to obtain MT2 edge measurements in the presence of heavy combinatorics background, they key element being the parallel use of at least two independent methods of reducing combinatorics background to avoid fake measurements. All of these techniques are developed in a Monte Carlo study of the decay gluino gluino -> 2 sbottom + 2 b -> 4 b + 2 chi_0^1 and verified in a second blind study with a different spectrum. In both cases, the gluino and sbottom masses are measured to a precision of ~ 10% with O(100 fb^{-1}) at the LHC14 (assuming pessimistic b-tag efficiencies).
description: 35 pages, 12 figures
Contextual unification of classical and quantum physics
Creators: name: Bossche, Mathias Van Den
name: Grangier, Philippe
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: History and Philosophy of Physics (physics.hist-ph)
subject: FOS: Physical sciences

description: Following an article by John von Neumann on infinite tensor products, we develop the idea that the usual formalism of quantum mechanics, associated with unitary equivalence of representations, stops working when countable infinities of particles (or degrees of freedom) are encountered. This is because the dimension of the corresponding Hilbert space becomes uncountably infinite, leading to the loss of unitary equivalence, and to sectorization. By interpreting physically this mathematical fact, we show that it provides a natural way to describe the "Heisenberg cut", as well as a unified mathematical model including both quantum and classical physics, appearing as required incommensurable facets in the description of nature.
description: 13 pages, no figure. In v2 some clarifications added
The Radial Profile of Dust Grain Size in the Protoplanetary Disk of DS Tau
Creators: name: Li, Dafa
name: Liu, Yao
name: Wang, Hongchi
name: Wang, Yao
name: Ma, Yuehui
Publisher: name: arXiv
Year: 2022
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: How do dust grains in protoplanetary disks overcome rapid radial drift and grow from micron size particles to planets is not well understood. The key is to search for evidence of dust accumulation and growth as a function of radius in the disk. We investigate the radial profile of grain size in the DS Tau disk by fitting multi-band ALMA observations with self-consistent radiative transfer models. The best-fit grain sizes range from centimeters in the inner disk down to 30 micron in the outer regions. Such an inside-out decreasing tendency is consistent with theories of dust evolution. Based on the best-fit model, we find that dust of 2 Jupiter masses has been depleted within the gap. By taking the gas-to-dust mass ratio into account, the lost mass is enough to form the 3.5 Jupiter mass planet inferred by literature hydrodynamic simulations. Moreover, our modeling also indicates that at the interface region between the gap and the ring, the grain size profile shows a discontinuity, with its amplitude dependent on the dust model adopted in the radiative transfer analysis. Future multi-wavelength observations at higher angular resolutions are required to better constrain the grain size and its variation in the vicinity of disk substructures.
description: 10 pages, 8 figures, accepted for publication in MNRAS
NGC 7538 IRS2 in [NeII]: Shell and Cavity Kinematics of a Compact HII Region
Creators: name: Beilis, Dan
name: Beck, Sara
name: Lacy, John
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: NGC 7538 IRS2 is a compact HII region and recent star formation source, with a shell morphology, lying on the border of the visible HII region NGC 7538. We present a spectral cube of the [NeII] 12.8 micron emission line obtained with the TEXES spectrometer on Gemini North with velocity resolution approximately 4 km/s and angular resolution 0.3". The kinematics of the data cube show ionized gas flowing along multiple cavity walls. We have simulated the kinematics and structure of IRS2 with a model of superimposed cavities created by outflows from embedded stars in a cloud with density gradients. Most of the cavities, including the largest that dominates IRS2 structure, are associated with B-type stars; the outflow of the bright ionizing O star binary IRS2a/b is small in extent and lies in a high-density clump. The IRS2 model shows that the behavior of an HII region is not a matter of only the most massive star present; cloud clumpiness and activity of lower mass stars may determine the structure and kinematics.
description: Resubmitted to MNRAS
X-ray Performance of a Small Pixel Size sCMOS Sensor and the Effect of Depletion Depth
Creators: name: Hsiao, Yu
name: Ling, Zhixing
name: Zhang, Chen
name: Wang, Wenxin
name: Zhou, Quan
name: Wang, Xinyang
name: Zhang, Shuang-Nan
name: Yuan, Weimin
Publisher: name: arXiv
Year: 2022
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: In recent years, scientific Complementary Metal Oxide Semiconductor (sCMOS) devices have been increasingly applied in X-ray detection, thanks to their attributes such as high frame rate, low dark current, high radiation tolerance and low readout noise. We tested the basic performance of a backside-illuminated (BSI) sCMOS sensor, which has a small pixel size of 6.5 um * 6.5 um. At a temperature of -20C, The readout noise is 1.6 e, the dark current is 0.5 e/pixel/s, and the energy resolution reaches 204.6 eV for single-pixel events. The effect of depletion depth on the sensor's performance was also examined, using three versions of the sensors with different deletion depths. We found that the sensor with a deeper depletion region can achieve a better energy resolution for events of all types of pixel splitting patterns, and has a higher efficiency in collecting photoelectrons produced by X-ray photons. We further study the effect of depletion depth on charge diffusion with a center-of-gravity (CG) model. Based on this work, a highly depleted sCMOS is recommended for applications of soft X-ray spectroscop.
description: 11 pages, 13 figures. Accepted for publication in JInst
A Crypto-Assisted Approach for Publishing Graph Statistics with Node Local Differential Privacy
Creators: name: Liu, Shang
name: Cao, Yang
name: Murakami, Takao
name: Yoshikawa, Masatoshi
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: Publishing graph statistics under node differential privacy has attracted much attention since it provides a stronger privacy guarantee than edge differential privacy. Existing works related to node differential privacy assume a trusted data curator who holds the whole graph. However, in many applications, a trusted curator is usually not available due to privacy and security issues. In this paper, for the first time, we investigate the problem of publishing the graph degree distribution under Node Local Differential privacy (Node-LDP), which does not rely on a trusted server. We propose an algorithm to publish the degree distribution with Node-LDP by exploring how to select the optimal graph projection parameter and how to execute the local graph projection. Specifically, we propose a Crypto-assisted local projection method that combines LDP and cryptographic primitives, achieving higher accuracy than our baseline PureLDP local projection method. On the other hand, we improve our baseline Node-level parameter selection by proposing an Edge-level parameter selection that preserves more neighboring information and provides better utility. Finally, extensive experiments on real-world graphs show that Edge-level local projection provides higher accuracy than Node-level local projection, and Crypto-assisted parameter selection owns the better utility than PureLDP parameter selection, improving by up to 79.8% and 57.2% respectively.
description: Accepted by IEEE BigData 2022, https://ieeexplore.ieee.org/document/10020435
title: "Statua di Ercole in assalto", arte romana, inv. CCXCIX (ITA/EN)
title: Scheda catalogo digitale Borghese
titleType: AlternativeTitle
Creators: name: Ciccarello, Giulia
name: Galleria Borghese
Publisher: name: Galleria Borghese
Year: 2024

description: Pubblicazione delle schede delle opere conservate nel museo ed estratte dal catalogo digitale di

Galleria Borghese, nelle due versioni esistenti online, in italiano e inglese.

Collegamento al catalogo digitale:

ITA: https://www.collezionegalleriaborghese.it/

EN: https://www.collezionegalleriaborghese.it/en
Preserving Metamagnetism in Self-Assembled FeRh Nanomagnets
Creators: name: Motyčková, Lucie
name: Arregi, Jon Ander
name: Staňo, Michal
name: Průša, Stanislav
name: Částková, Klára
name: Uhlíř, Vojtěch
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present self-assembly routes of metamagnetic FeRh nanoisland arrays using sputter deposition processing. Controlling the growth parameters and epitaxy allows tuning the size and shape of the FeRh nanoislands. While the phase transition between antiferromagnetic and ferromagnetic order is largely suppressed in nanoislands formed on oxide substrates via thermodynamic nucleation, we find that metamagnetism is largely preserved in nanomagnet arrays formed through solid-state dewetting. This behavior is strongly dependent on the resulting crystal faceting of the nanoislands, which is characteristic of each assembly route. Comparing the calculated surface energies for each magnetic phase of the nanoislands reveals that metamagnetism can be suppressed or allowed by specific geometrical configurations of the facets. Furthermore, we find that the spatial confinement leads to very pronounced supercooling and the absence of phase separation in the nanoislands. Finally, the supported nanomagnets are chemically etched away from the substrates to inspect the phase transition properties of self-standing nanoparticles. We demonstrate that solid-state dewetting is a feasible and scalable way to obtain supported and free-standing FeRh nanomagnets with preserved metamagnetism.
description: 28 pages, 7 figures, 1 table
A low-mass companion desert among intermediate-mass visual binaries: The scaled-up counterpart to the brown dwarf desert
Creators: name: Duchene, G.
name: Oon, J. T.
name: De Rosa, R. J.
name: Kantorski, P.
name: Coy, B.
name: Wang, J. J.
name: Thomas, S.
name: Patience, J.
name: Pueyo, L.
name: Nielsen, E. L.
name: Konopacky, Q.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We present a high-contrast imaging survey of intermediate-mass (1.75--4.5 $M_\odot$) stars to search for the most extreme stellar binaries, i.e., for the lowest mass stellar companions. Using adaptive optics at the Lick and Gemini observatories, we observed 169 stars and detected 24 candidates companions, 16 of which are newly discovered and all but three are likely or confirmed physical companions. Despite obtaining sensitivity down to the substellar limit for 75\% of our sample, we do not detect any companion below 0.3 $M_\odot$, strongly suggesting that the distribution of stellar companions is truncated at a mass ratio of $q_\mathrm{min} \gtrsim0.075$. Combining our results with known brown dwarf companions, we identify a low-mass companion desert to intermediate mass stars in the range $0.02\lesssim q \lesssim0.05$, which quantitatively matches the known brown dwarf desert among solar-type stars. We conclude that the formation mechanism for multiple systems operates in a largely scale-invariant manner and precludes the formation of extremely uneven systems, likely because the components of a proto-binary accrete most of their mass after the initial cloud fragmentation. Similarly, the mechanism to form "planetary" ($q \lesssim 0.02$) companions likely scales linearly with stellar mass, probably as a result of the correlation between the masses of stars and their protoplanetary disks. Finally, we predict the existence of a sizable population of brown dwarf companions to low-mass stars and of a rising population of planetary-mass objects towards $\approx 1\,M_\mathrm{Jup}$ around solar-type stars. Improvements on current instrumentation will test these predictions.
description: Accepted for publication in MNRAS; 23 pages, 17 figures
On the improvements of Hardy and Copson inequalities
Creators: name: Das, Bikram
name: Manna, Atanu
Publisher: name: arXiv
Year: 2022
Subjects: subject: Functional Analysis (math.FA)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 26D15, 46A45

description: In this current work, we revisit the recent improvement of the discrete Hardy's inequality in one dimension and establish an extended improved discrete Hardy's inequality with its optimality. We also study one-dimensional discrete Copson's inequality (E.T. Copson, \emph{Notes on a series of positive terms}, J. London Math. Soc., 2 (1927), 9-12.), and achieve an improvement of the same in a particular case. Further, we study some fundamental structures such as completeness, Köthe-Toeplitz duality, separability, etc. of the sequence spaces which originated from the improved discrete Hardy and Copson inequalities in one dimension.
description: 17 pages (In progress)
Dispersive censor of acoustic spacetimes with a shock-wave singularity
Creators: name: Fischer, Uwe R.
name: Datta, Satadal
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: A dispersionless shock wave in a fluid without friction develops an acoustic spacetime singularity which is naked (not hidden by a horizon). We show that this naked nondispersive shock-wave singularity is prohibited to form in a Bose-Einstein condensate, due to the microscopic structure of the underlying ${\rm a}\!{\rm e}$ther and the resulting effective trans-Planckian dispersion. Approaching the instant of shock $t_{\rm shock}$, rapid spatial oscillations of density and velocity develop around the shock location, which begin to emerge already slightly before $t_{\rm shock}$, due to the quantum pressure in the condensate. These oscillations render the acoustic spacetime structure completely regular, and therefore lead to a removal (censoring) of the spacetime singularity. Thus, distinct from the cosmic censorship hypothesis of Penrose formulated within Einsteinian gravity, the quantum pressure in Bose-Einstein condensates censors (prohibits) the formation of a naked shock-wave singularity, instead of hiding it behind a horizon.
description: 11 pages, 7 figures
Pole-skipping of Holographic Correlators: Aspects of Gauge Symmetry and Generalizations
Creators: name: Wang, Yuan-Tai
name: Pan, Wen-Bin
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In the framework of anti-de Sitter space/conformal field theory (AdS/CFT), we study the pole-skipping phenomenon of the holographic correlators of boundary operators. We explore the locations of the pole-skipping points case by case with the models of $U(1)$-gauged form fields propagating in the asymptotic AdS bulk of finite temperature. In general, in different cases all the first-order points are located at the Matsubara frequency with corresponding wave vectors regularly dispersed in the momentum space. Specifically, in the massless cases with $U(1)$ symmetry, the wave vectors of the pole-skipping points have a form-number dependence, and a trans-mode equivalence in the dual fields is found in correspondence with electromagnetic duality. In the massive cases with explicit symmetry breaking, we find that the appearance of a non-zero mass yields extra pole-skipping points which reduce to the massless results in zero mass limit. We expect in such kind of pole-skipping properties implications of distinctive physics in the chaotic systems. Our near-horizon computation is verified with the double-trace method especially in the example of 2-form where there is dimension-dependent boundary divergence. We illustrate in these cases that the pole-skipping properties of the holographic correlators are determined by the IR physics, consistent with the ordinary cases in previous studies.
description: 23 pages; typos and errors are fixed
Complete Integrability for Hamiltonian Systems with a Cone Potential
Creators: name: Gorni, Gianluca
name: Zampieri, Gaetano
Publisher: name: arXiv
Year: 2012
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Analysis of PDEs (math.AP)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 58F05 (58F07 70H05)

description: It is known that, if a point in $R^n$ is driven by a bounded below potential $V$, whose gradient is always in a closed convex cone which contains no lines, then the velocity has a finite limit as time goes to $+\infty$. The components of the asymptotic velocity, as functions of the initial data, are trivially constants of motion. We find sufficient conditions for these functions to be $C^k$ ($2\le k \le+\infty$) first integrals, independent and pairwise in involution. In this way we construct a large class of completely integrable systems. We can deal with very different asymptotic behaviours of the potential and we have persistence of the integrability under any small perturbation of the potential in an arbitrary compact set.
Change energy photons of radiation, stimulating a photoluminescence in glasses and optical fiber, activated by bismuth
Creators: name: Ogluzdin, Valeriy E.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Optics (physics.optics)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: In the offered review ordering received and published by domestic and foreign researchers of the experimental results showing the phenomenon of a photoluminescence in glasses and optical fiber, activated by bismuth is executed, and from uniform positions representations about the process responsible for a photoluminescence in case of use for excitation of this environment of various laser sources are considered. At interpretation of process of a photoluminescence the known model considering mirror symmetry of features of frequency spectra of a photoluminescence (in this case the maximum values is used: humps or peaks of spectra of a photoluminescence) and the spectra characterising optical losses (absorption) of glass, activated by (atomic) bismuth. For the analysis values of lines of the bismuth, published in reference media are used. This model is added by earlier published specification of the author, according to which to a point of mirror symmetry of such spectra there corresponds frequency of radiation of the source raising a photoluminescence - mean arithmetical of the frequencies of peaks of spectra of a photoluminescence and frequencies of lines atomic bismuth.
description: Russian + english, 20 pages
title: Process intensification of biological desulphurisation of biogas
title: Prozessintensivierung der biologischen Entschwefelung von Biogas
titleType: AlternativeTitle
Creators: name: Gayh, Ulrike
Publisher: name: TUHH Universitätsbibliothek
Year: 2012
Subjects: subject: Huminstoffe
subject: Biogas
subject: desulphurisation
subject: humic substances
classificationCode: 620
subject: Ingenieurwissenschaften
classificationCode: 58.30
subject: Biotechnologie
subject: Biogas
subject: Entschwefelung

description: Die zweistufige biologische Entschwefelung, bestehend aus einem Wäscher und einer nachgeschalteten biologischen Regeneration, wurde durch den Einsatz von Huminstoffen als Löslichkeitsvermittler optimiert. Die Verbesserung der H2S-Entfernung durch Huminstoffe sowie die Regeneration der huminstoffhaltigen Waschflüssigkeit durch Schwefelbakterien wurde analysiert und bewertet. Die Versuche und die Simulation der Waschkolonne zeigten, dass der Einsatz von Huminstoffen zur Entschwefelung sehr effektiv ist.
description: The double stage biological desulphurisation, consisting of a scrubber with downstream biological regeneration, was improved using humic substances as solubilisers. The optimisation of H2S removal by humic substances and the regeneration by sulphur bacteria of the washing liquid containing humic substances were analysed and evaluated. The experiments as well as the simulation of the scrubber showed that biogas can be desulphurised very efficiently by the addition of humic substances.
The Augmented Complex Kernel LMS
Creators: name: Bouboulis, Pantelis
name: Theodoridis, Sergios
name: Mavroforakis, Michael
Publisher: name: arXiv
Year: 2011
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Recently, a unified framework for adaptive kernel based signal processing of complex data was presented by the authors, which, besides offering techniques to map the input data to complex Reproducing Kernel Hilbert Spaces, developed a suitable Wirtinger-like Calculus for general Hilbert Spaces. In this short paper, the extended Wirtinger's calculus is adopted to derive complex kernel-based widely-linear estimation filters. Furthermore, we illuminate several important characteristics of the widely linear filters. We show that, although in many cases the gains from adopting widely linear estimation filters, as alternatives to ordinary linear ones, are rudimentary, for the case of kernel based widely linear filters significant performance improvements can be obtained.
description: manuscript submitted to IEE Transactions on Signal Processing
Constraining νΛCDM with density-split clustering
Creators: name: Paillas, Enrique
name: Cuesta-Lazaro, Carolina
name: Zarrouk, Pauline
name: Cai, Yan-Chuan
name: Percival, Will J.
name: Nadathur, Seshadri
name: Pinon, Mathilde
name: de Mattia, Arnaud
name: Beutler, Florian
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The dependence of galaxy clustering on local density provides an effective method for extracting non-Gaussian information from galaxy surveys. The two-point correlation function (2PCF) provides a complete statistical description of a Gaussian density field. However, the late-time density field becomes non-Gaussian due to non-linear gravitational evolution and higher-order summary statistics are required to capture all of its cosmological information. Using a Fisher formalism based on halo catalogues from the Quijote simulations, we explore the possibility of retrieving this information using the density-split clustering (DS) method, which combines clustering statistics from regions of different environmental density. We show that DS provides more precise constraints on the parameters of the $νΛ$CDM model compared to the 2PCF, and we provide suggestions for where the extra information may come from. DS improves the constraints on the sum of neutrino masses by a factor of $7$ and by factors of 4, 3, 3, 6, and 5 for $Ω_{\rm m}$, $Ω_{\rm b}$, $h$, $n_s$, and $σ_8$, respectively. We compare DS statistics when the local density environment is estimated from the real or redshift-space positions of haloes. The inclusion of DS autocorrelation functions, in addition to the cross-correlation functions between DS environments and haloes, recovers most of the information that is lost when using the redshift-space halo positions to estimate the environment. We discuss the possibility of constructing simulation-based methods to model DS clustering statistics in different scenarios.
description: Author's accepted manuscript
The travel behaviour of young families: opportunities for lift-sharing to and from children’s activities
Creators: name: Sarah-Anne De-Kremer
Publisher: name: Loughborough University
Year: 2020
Subjects: subject: 120399 Design Practice and Management not elsewhere classified
subject: FOS: Arts (arts, history of arts, performing arts, music)

description: This research presents a study of the opportunities for lift-sharing between families with young children in the specific context of children’s activities. The research identifies the key conditions that support lift-sharing in this context. Study 1 utilised travel pattern diaries and interviews on reasons for mode choice (with 13 families) to identify opportunities to decrease frequency of low occupancy car trips in families with young children. Frequency of short and/or low occupancy car trips was high. The potential for lift-sharing for children’s activities was identified. There was a lack of existing research on factors influencing lift-sharing of this type; consequently Study 2 and Study 3 aimed to explore lift-sharing for children’s activities. The online travel survey of 474 families in Study 2 assessed lift-share prevalence to establish socio-demographic and activity factors that influence lift-share prevalence, in general and for children’s activities. These influential factors include: number of cars owned, number of seats in car, settlement type, income level, time of day and location of the activity, number of children attending, parking availability and number of close friends of the child attendee. Study 3 comprised interviews with 15 parents to gain a deeper understanding of how and why families participate in activity lift-sharing, and to understand how social exchange theory applies in this context. Key findings included time saving ability and social opportunity as salient motivating factors, trust being an initial imperative component of lift-share formation, variation in attitudes towards reciprocity, parent utilisation of synchronous and asynchronous communication channels being dependent on time gap to lift-share responsibility and recognition of the advantageous group communication affordances of instant group messaging applications. Five fundamental themes were identified across the results of the three studies. These included influential ‘household factors’ and influential ‘activity factors,’ and the concepts of and implications of ‘time,’ ‘relationships,’ and ‘technology and communications’ that are fundamental to activity lift-share operation and formation. The knowledge gained on these topics has taken forward understanding of how lift-sharing between families with young children operates, and our understanding of the opportunities for children’s activity lift-sharing.
Engineering dynamically decoupled quantum simulations with trapped ions
Creators: name: Morong, W.
name: Collins, K. S.
name: De, A.
name: Stavropoulos, E.
name: You, T.
name: Monroe, C.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: An external drive can improve the coherence of a quantum many-body system by averaging out noise sources. It can also be used to realize models that are inaccessible in the static limit, through Floquet Hamiltonian engineering. The full possibilities for combining these tools remain unexplored. We develop the requirements needed for a pulse sequence to decouple a quantum many-body system from an external field without altering the intended dynamics. Demonstrating this technique experimentally in an ion-trap platform, we show that it can provide a large improvement to coherence in real-world applications. Finally, we engineer an approximate quantum simulation of the Haldane-Shastry model, an exactly solvable paradigm for long-range interacting spins. Our results expand and unify the quantum simulation toolbox.
description: Close to published version
A dynamical study of Galactic globular clusters under different relaxation conditions
Creators: name: Zocchi, A.
name: Bertin, G.
name: Varri, A. L.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We perform a systematic combined photometric and kinematic analysis of a sample of globular clusters under different relaxation conditions, based on their core relaxation time (as listed in available catalogs), by means of two well-known families of spherical stellar dynamical models. Systems characterized by shorter relaxation time scales are expected to be better described by isotropic King models, while less relaxed systems might be interpreted by means of non-truncated, radially-biased anisotropic f^(ν) models, originally designed to represent stellar systems produced by a violent relaxation formation process and applied here for the first time to the study of globular clusters. The comparison between dynamical models and observations is performed by fitting simultaneously surface brightness and velocity dispersion profiles. For each globular cluster, the best-fit model in each family is identified, along with a full error analysis on the relevant parameters. Detailed structural properties and mass-to-light ratios are also explicitly derived. We find that King models usually offer a good representation of the observed photometric profiles, but often lead to less satisfactory fits to the kinematic profiles, independently of the relaxation condition of the systems. For some less relaxed clusters, f^(ν) models provide a good description of both observed profiles. Some derived structural characteristics, such as the total mass or the half-mass radius, turn out to be significantly model-dependent. The analysis confirms that, to answer some important dynamical questions that bear on the formation and evolution of globular clusters, it would be highly desirable to acquire larger numbers of accurate kinematic data-points, well distributed over the cluster field.
description: 18 pages, 7 figures. Accepted for publication in Astronomy & Astrophysics
Dynamics, interference effects, and multistability in a Lorenz-like system of a classical wave-particle entity in a periodic potential
Creators: name: Perks, Joshua
name: Valani, Rahil
Publisher: name: arXiv
Year: 2022
Subjects: subject: Dynamical Systems (math.DS)
subject: Classical Physics (physics.class-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: A classical wave-particle entity (WPE) can be realized experimentally as a droplet walking on the free surface of a vertically vibrating liquid bath, with the droplet's horizontal walking motion guided by its self-generated wave field. These self-propelled WPEs have been shown to exhibit analogs of several quantum and optical phenomena. Using an idealized theoretical model that takes the form of a Lorenz-like system, we theoretically and numerically explore the dynamics of such a one-dimensional WPE in a sinusoidal potential. We find steady states of the system that correspond to a stationary WPE as well as a rich array of unsteady motions such as back-and-forth oscillating walkers, runaway oscillating walkers and various types of irregular walkers. In the parameter space formed by the dimensionless parameters of the applied sinusoidal potential, we observe patterns of alternating unsteady behaviors suggesting interference effects. Additionally, in certain regions of the parameter space, we also identify multistability in the particle's long-term behavior that depends on the initial conditions. We make analogies between the identified behaviors in the WPE system and Bragg's reflection of light as well as electron motion in crystals.
description: 12 pages, 8 figures
Implementing Global Masters into Parallel Condensation
Creators: name: Pelzer, Andreas
name: Hofferek, Birgit
name: Voß, Heinrich
Publisher: name: TUHH Universitätsbibliothek
Year: 2000
Subjects: subject: eigenvalue problem
subject: condensation
subject: global masters
classificationCode: 510
subject: Mathematik
subject: Eigenwertproblem
subject: Kondensation
classificationCode: 65F15
subject: Eigenvalues, eigenvectors

description: The dynamic analysis of structures leads to very large generalized eigenvalue problems. Their number of unknowns can be reduced to a manageable size by condensation methods which can be parallelized by combining it with substructuring. In this note we implement global masters into the parallel condensation process.
BOBBER: A Prototyping Platform for Batteryless Intermittent Accelerators
Creators: name: Narayanan, Vishak
name: Sahu, Rohit
name: Jidong Sun
name: Duwe, Henry
Publisher: name: Zenodo
Year: 2023

description: Uploading a version of the Gitlab repo, containing design files used to generate the results for BOBBER as reported in FPGA 2023.
description: https://git.ece.iastate.edu/iowa-state-batteryless-intelligent-computation/Bobber/-/tree/Rel1.0
Increased success probability in Hardy's nonlocality: Theory and demonstration
Creators: name: Tran, Duc Minh
name: Nguyen, Van-Duy
name: Ho, Le Bin
name: Nguyen, Hung Q.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Depending on the way one measures, quantum nonlocality might manifest more visibly. Using basis transformations and interactions on a particle pair, Hardy logically argued that any local hidden variable theory leads to a paradox. Extended from the original work, we introduce a quantum nonlocal scheme for n-particle systems using two distinct approaches. First, a theoretical model is derived with analytical results for Hardy's nonlocality conditions and probability. Second, a quantum simulation using quantum circuits is constructed that matches very well to the analytical theory. When demonstrated on real quantum computers for n=3, we obtain reasonable results compared to theory. Even at macroscopic scales as n grows, the success probability asymptotes 15.6%, which is stronger than previous results.
description: 4 pages, 4 figures
BOBBER: A Prototyping Platform for Batteryless Intermittent Accelerators
Creators: name: Narayanan, Vishak
Publisher: name: Zenodo
Year: 2023

description: Initial pre-release of the project for artifact evaluation form.
description: GitLab link: https://git.ece.iastate.edu/iowa-state-batteryless-intelligent-computation/Bobber/-/tree/v0.1
Reducing charge noise in quantum dots by using thin silicon quantum wells
Creators: name: Wuetz, B. Paquelet
name: Esposti, D. Degli
name: Zwerver, A. M. J.
name: Amitonov, S. V.
name: Botifoll, M.
name: Arbiol, J.
name: Sammak, A.
name: Vandersypen, L. M. K.
name: Russ, M.
name: Scappucci, G.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Charge noise in the host semiconductor degrades the performance of spin-qubits and poses an obstacle to control large quantum processors. However, it is challenging to engineer the heterogeneous material stack of gate-defined quantum dots to improve charge noise systematically. Here, we address the semiconductor-dielectric interface and the buried quantum well of a $^{28}$Si/SiGe heterostructure and show the connection between charge noise, measured locally in quantum dots, and global disorder in the host semiconductor, measured with macroscopic Hall bars. In 5 nm thick $^{28}$Si quantum wells, we find that improvements in the scattering properties and uniformity of the two-dimensional electron gas over a 100 mm wafer correspond to a significant reduction in charge noise, with a minimum value of 0.29$\pm$0.02 $μ$eV/sqrt(Hz) at 1 Hz averaged over several quantum dots. We extrapolate the measured charge noise to simulated dephasing times to cz-gate fidelities that improve nearly one order of magnitude. These results point to a clean and quiet crystalline environment for integrating long-lived and high-fidelity spin qubits into a larger system.
title: "Testa di sileno in applique", arte romana, inv. CCXCVI (ITA/EN)
title: Scheda catalogo digitale Borghese
titleType: AlternativeTitle
Creators: name: Ciccarello, Giulia
name: Galleria Borghese
Publisher: name: Galleria Borghese
Year: 2024

description: Pubblicazione delle schede delle opere conservate nel museo ed estratte dal catalogo digitale di

Galleria Borghese, nelle due versioni esistenti online, in italiano e inglese.

Collegamento al catalogo digitale:

ITA: https://www.collezionegalleriaborghese.it/

EN: https://www.collezionegalleriaborghese.it/en
Book review: “The dreamkeepers: An Invictus mystery thriller”. by Antonio Zadra.
Creators: name: Schredl, Michael
Publisher: name: International Journal of Dream Research
Year: 2020

description: The book, by Antonio Zadra, includes recurrent dreams, lucid dreaming, nightmares, violence, evil creatures, and the dreamkeepers’ task is to ensure that the dreamworld is free of oppression and terror. Several oneironauts, like James Dillan, Vincente Santilli (in the footsteps of his mother) and Michael Kohler, are trying to outwit the dark forces that try to take over the dreamworld and rule mankind. Overall, the book is well-written and is gripping from beginning to end.
description: International Journal of Dream Research, Vol 13, No 1 (April 2020)
International Year of the Salmon Data Mobilization Strategic Recommendations
Creators: name: Johnson, Brett
name: Van Der Stap, Tim
Publisher: name: Zenodo
Year: 2020
Subjects: Salmon
data
International Year of the Salmon

description: This was a report produced by data scientists at the Hakai Institute to inform the North Pacific Anadromous Fish Commission of a data mobilization strategy for the International Year of the Salmon High Seas Expeditions. See https://iys.hakai.org for the data generated from this project
Der Hochaltar von St. Georg in Nördlingen
Creators: name: Hilger, Hans Peter
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2020

description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 26 Nr. 7 (1973): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
title: "Busto di figura maschile barbata", arte romana, inv. CCXCV (ITA/EN)
title: Scheda catalogo digitale Borghese
titleType: AlternativeTitle
Creators: name: Ciccarello, Giulia
name: Galleria Borghese
Publisher: name: Galleria Borghese
Year: 2024

description: Pubblicazione delle schede delle opere conservate nel museo ed estratte dal catalogo digitale di

Galleria Borghese, nelle due versioni esistenti online, in italiano e inglese.

Collegamento al catalogo digitale:

ITA: https://www.collezionegalleriaborghese.it/

EN: https://www.collezionegalleriaborghese.it/en
Manipulum florum
Creators: name: Thomas
name: Wilhelmus
Publisher: name: [s.n.]
Year: 1324

description: Thomas Hibernicus
description: Öffentliche Bibliothek der Universität Basel
description: Latein
description: Aus der Basler Kartause. Besitzeintrag Loubers auf Bl. Ar: "Carthusiensium in Basilea" und alte Signatur "h xxv"; diese deckt sich mit derjenigen des Eintrags im alten Standortkatalog der Bibliotheca Antiqua; der alphabetische Katalog hat auf Bl. 114r noch "h xxiiii" und bestätigt die oben erwähnte Korrektur. Weitere Besitzeinträge auf 1r "Iste liber est Cartusiensium Basilee", 214r "Iste liber est vallis sancte Margarethe in minori Basilea ordinis Carthusiensium"; des Weiteren auf 1r oben ein mit Stift geschriebener, radierter Eintrag "Cartus[...]" und darunter "Thomas de Hybernia", daneben eine noch ältere, radierte Basler Signatur von der Hand Heinrich Arnoldis: "C XL". Über den Zeitpunkt der Erwerbung sagt die Chronik Arnoldis, BChr 1, 291, von Prior Albertus Buer "procuravit filiis meis ipse manipulum florum".
description: Verzeichnung=Description=Inventaire 2008 Titel, Jahr, Sprache, Signatur, Vorbesitzer nach: Meyer/Burckhardt
description: Verzeichnung=Description=Inventaire Mai 2024 Minimalaufnahme auf Basis von Autopsie und Meyer/Burckhardt
description: Digitalisierung=Digitization=Numérisation Mai 2024 TIFF
description: Erschliessungsniveau Minimalniveau