cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Frölicher spectral sequence of compact complex manifolds with special Hermitian metrics
Creators: name: Latorre, A.
name: Ugarte, L.
name: Villacampa, R.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53C55, 32J27, 53C15

description: In this paper we focus on the interplay between the behaviour of the Frölicher spectral sequence and the existence of special Hermitian metrics on the manifold, such as balanced, SKT or generalized Gauduchon. The study of balanced metrics on nilmanifolds endowed with strongly non-nilpotent complex structures allows us to provide infinite families of compact balanced manifolds with Frölicher spectral sequence not degenerating at the second page. Moreover, this result is extended to non-degeneration at any arbitrary page. Similar results are obtained for the Frölicher spectral sequence of compact generalized Gauduchon manifolds. We also find a compact SKT manifold whose Frölicher spectral sequence does not degenerate at the second page, thus providing a counterexample to a conjecture by Popovici.
description: 23 pages. New Appendix A
Conformal mapping of Unruh temperature
Creators: name: Martinetti, Pierre
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Thanks to a local interpetation of the KMS condition, the mapping from (unbounded) wedge regions of Minkowski space-time to (bounded) double-cone regions is extended to the Unruh temperature associated to relevant observers in both regions. A previous result, the diamond's temperature, is shown to be proportional to the inverse of the conformal factor (Weyl rescaling of the metric) of this map. One thus explains from a mathematical point of view why an observer with finite lifetime experiences the vacuum as a thermal state whatever his acceleration, even vanishing.
description: Paper shortened and reorganized. To be published in Modern Physics Letters A
1 Brief an [Hans Georg Nägeli]
Brief an Nägeli ...
Creators: name: Schnyder von Wartensee, Franz Xaver
Publisher: name: [s.n.]
Year: 1809

description: von [Franz] X[aver] Schnyder [von Wartensee]
description: Abschrift von Hermann Nägeli; Originalbrief in Ms V 455.2.2
Erasure qubits: Overcoming the $T_1$ limit in superconducting circuits
Creators: name: Kubica, Aleksander
name: Haim, Arbel
name: Vaknin, Yotam
name: Brandão, Fernando
name: Retzker, Alex
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The amplitude damping time, $T_1$, has long stood as the major factor limiting quantum fidelity in superconducting circuits, prompting concerted efforts in the material science and design of qubits aimed at increasing $T_1$. In contrast, the dephasing time, $T_ϕ$, can usually be extended above $T_1$ (via, e.g., dynamical decoupling), to the point where it does not limit fidelity. In this article we propose a scheme for overcoming the conventional $T_1$ limit on fidelity by designing qubits in a way that amplitude damping errors can be detected and converted into erasure errors. Compared to standard qubit implementations our scheme improves the performance of fault-tolerant protocols, as numerically demonstrated by the circuit-noise simulations of the surface code. We describe two simple qubit implementations with superconducting circuits and discuss procedures for detecting amplitude damping errors, performing entangling gates, and extending $T_ϕ$. Our results suggest that engineering efforts should focus on improving $T_ϕ$ and the quality of quantum coherent control, as they effectively become the limiting factor on the performance of fault-tolerant protocols.
description: 7+8 pages, 6 figures
Is Vtb=1 ?
Creators: name: Alwall, J.
name: Frederix, R.
name: Gerard, J. -M.
name: Giammanco, A.
name: Herquet, M.
name: Kalinin, S.
name: Kou, E.
name: Lemaitre, V.
name: Maltoni, F.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The strongest constraint on Vtb presently comes from the 3 x 3 unitarity of the CKM matrix, which fixes Vtb to be very close to one. If the unitarity is relaxed, current information from top production at Tevatron still leaves open the possibility that Vtb is sizably smaller than one. In minimal extensions of the standard model with extra heavy quarks, the unitarity constraints are much weaker and the EW precision parameters entail the strongest bounds on Vtb. We discuss the experimental perspectives of discovering and identifying such new physics models at the Tevatron and the LHC, through a precise measurement of Vtb from the single top cross sections and by the study of processes where the extra heavy quarks are produced.
description: 19 pages, 8 figures
Proof of a conjecture on the determinant of walk matrix of rooted product with a path
Creators: name: Wang, Wei
name: Yan, Zhidan
name: Mao, Lihuan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C50

description: The walk matrix of an $n$-vertex graph $G$ with adjacency matrix $A$, denoted by $W(G)$, is $[e,Ae,\ldots,A^{n-1}e]$, where $e$ is the all-ones vector. Let $G\circ P_m$ be the rooted product of $G$ and a rooted path $P_m$ (taking an endvertex as the root), i.e., $G\circ P_m$ is a graph obtained from $G$ and $n$ copies of $P_m$ by identifying each vertex of $G$ with an endvertex of a copy of $P_m$. Mao-Liu-Wang (2015) and Mao-Wang (2022) proved that, for $m=2$ and $m\in\{3,4\}$, respectively$$\det W(G\circ P_m)=\pm a_0^{\lfloor\frac{m}{2}\rfloor}(\det W(G))^m,$$ where $a_0$ is the constant term of the characteristic polynomial of $G$. Furthermore, Mao-Wang (2022) conjectured that the formula holds for any $m\ge 2$. In this note, we verify this conjecture using the technique of Chebyshev polynomials.
description: 12 pages,1 figure
Performance of the diamond-based beam-loss monitor system of Belle II
Creators: name: Bacher, S.
name: Bassi, G.
name: Bosisio, L.
name: Cautero, G.
name: Cristaudo, P.
name: Dorigo, M.
name: Gabrielli, A.
name: Giuressi, D.
name: Hara, K.
name: Jin, Y.
name: La Licata, C.
name: Lanceri, L.
name: Manfredi, R.
name: Nakayama, H.
name: Nakamura, K. R.
name: Natochii, A.
name: Paladino, A.
name: Rizzo, G.
name: Vitale, L.
name: Yin, H.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: We designed, constructed and have been operating a system based on single-crystal synthetic diamond sensors, to monitor the beam losses at the interaction region of the SuperKEKB asymmetric-energy electron-positron collider. The system records the radiation dose-rates in positions close to the inner detectors of the Belle II experiment, and protects both the detector and accelerator components against destructive beam losses, by participating in the beam-abort system. It also provides complementary information for the dedicated studies of beam-related backgrounds. We describe the performance of the system during the commissioning of the accelerator and during the first physics data taking.
Monte Carlo approach to nonperturbative strings -- demonstration in noncritical string theory
Creators: name: Kawahara, Naoyuki
name: Nishimura, Jun
name: Yamaguchi, Atsushi
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We show how Monte Carlo approach can be used to study the double scaling limit in matrix models. As an example, we study a solvable hermitian one-matrix model with the double-well potential, which has been identified recently as a dual description of noncritical string theory with worldsheet supersymmetry. This identification utilizes the nonperturbatively stable vacuum unlike its bosonic counterparts, and therefore it provides a complete constructive formulation of string theory. Our data with the matrix size ranging from 8 to 512 show a clear scaling behavior, which enables us to extract the double scaling limit accurately. The ``specific heat'' obtained in this way agrees nicely with the known result obtained by solving the Painleve-II equation with appropriate boundary conditions.
description: 15 pages, 10 figures, LaTeX, JHEP3.cls; references added, typos corrected
Genotype- free demultiplexing of singlecell-RNA-seq
Creators: name: Xu, Jon
name: Falconer, Caitlin
name: Nguyen, Quan
name: Crawford, Joanna
name: McKinnon, Brett D.
name: Mortlock, Sally
name: Pébay, Alice
name: Hewitt, Alex W.
name: Senabouth, Anne
name: Andersen, Stacey
name: Palpant, Nathan
name: Chiu, Han Sheng
name: Montgomery, Grant W.
name: Powell, Joseph
name: Coin, Lachlan
Publisher: name: F1000 Research Limited
Year: 2019

description: A variety of experimental and computational methods have been developed to demultiplex samples from pooled individuals in a single-cell RNA sequencing (scRNA-Seq) experiment which either require adding information (such as hashtag barcodes) or measuring information (such as genotypes) prior to pooling. We introduce scSplit which utilises genetic differences inferred from scRNA-Seq data alone to demultiplex pooled samples. scSplit also extracts a minimal set of high confidence presence/absence genotypes in each cluster which can be used to map clusters to original samples. Using a range of simulated, merged individual-sample as well as pooled multi-individual scRNA-Seq datasets, we show that scSplit is highly accurate and concordant with demuxlet predictions. Furthermore, scSplit predictions are highly consistent with the known truth in cell-hashing dataset. We also show that multiplexed-scRNA-Seq can be used to reduce batch effects caused by technical biases. scSplit is ideally suited to samples for which external genome-wide genotype data cannot be obtained (for example non-model organisms), or for which it is impossible to obtain unmixed samples directly, such as intra-tumor heterogeneity, or mixed infections. scSplit is available at: https://github.com/jon-xu/scSplit
1 Brief an H[ans] G[eorg] Nägeli
Brief an Nägeli ...
Creators: name: Schnyder von Wartensee, Franz Xaver
Publisher: name: [s.n.]
Year: 1814

description: von [Franz] X[aver] Schnyder [von Wartensee]
description: Abschrift von Hermann Nägeli; Originalbrief in Ms V 455.2.8
Study of omega-meson production in pp collisions at ANKE
Creators: name: Barsov, S.
name: Büscher, M.
name: Hartmann, M.
name: Hejny, V.
name: Kacharava, A.
name: Keshelashvili, I.
name: Khoukaz, A.
name: Koptev, V.
name: Kulessa, P.
name: Kulikov, A.
name: Lehmann, I.
name: Leontyev, V.
name: Macharashvili, G.
name: Maeda, Y.
name: Mersmann, T.
name: Merzliakov, S.
name: Mikirtytchyants, S.
name: Mussgiller, A.
name: Oellers, D.
name: Ohm, H.
name: Rathmann, F.
name: Schleichert, R.
name: Seyfarth, H.
name: Ströher, H.
name: Trusov, S.
name: Valdau, Y.
name: Wüstner, P.
name: Yaschenko, S.
name: Wilkin, C.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The production of omega-mesons in the pp->pp omega reaction has been investigated with the COSY-ANKE spectrometer for excess energies of 60 and 92MeV by detecting the two final protons and reconstructing their missing mass. The large multipion background was subtracted using an event-by-event transformation of the proton momenta between the two energies. Differential distributions and total cross sections were obtained after careful studies of possible systematic uncertainties in the overall ANKE acceptance. The results are compared with the predictions of theoretical models. Combined with data on the phi-meson, a more refined estimate is made of the Okubo-Zweig-Iizuka rule violation in the phi/omega production ratio.
description: 10 pages, 9 figures, version 1, submitted to EPJ-A
On the effect of beating during nonlinear frequency chirping
Creators: name: Bierwage, Andreas
name: White, Roscoe B.
name: Duarte, Vinícius N.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Spectral analyses of energetic particle (EP) driven bursts of MHD fluctuations in magnetically confined plasmas often exhibit multiple simultaneous chirps. While the superposition of oscillations at multiple frequencies necessarily causes beating in the signal acquired by a localized external probe, self-consistent hybrid simulations of chirping EP modes in a JT-60U tokamak plasma have demonstrated the possibility of global beating, where the electromagnetic field vanishes globally between beats and reappears with opposite phase. This implies that there can be a single field mode that oscillates at multiple frequencies simultaneously when resonantly driven by multiple density waves in EP phase space. Conversely, this means that the EP density waves are mutually coupled and interfere with each other via the jointly driven field, a mechanism ignored in some theories. In this treatise, we study the role of field pulsations in general and beating in particular using the Hamiltonian guiding center orbit-following code ORBIT with a reduced wave-particle interaction model in realistic geometry. Through amplitude pulsations and phase jumps, beating is found to drive the evolution of EP phase space structures. Observations: (1) Beating causes density wave fronts to advance radially in pulses. The resulting chirps become staircase-like. (2) The beats facilitate convective transfer of material between neighboring layers of phase space density waves. On the one hand, this may delay detachment of solitary vortices. On the other hand, it facilitates the accumulation of hole and clump fragments into larger structures. (3) Long-range chirping occurs when massive holes or clumps detach and drift away from the turbulent belt around the seed resonance. The detached vortices can remain robust and, on average, maintain their concentric nested layers while being perturbed by the field's continued beating.
description: main: 40 pages, 29 figures; appendices: 17 pages, 23 figures; 2020 JSPF meeting (invited)
Weatherwax Ranch (B-roll)
Creators: name: Girado, Luther
name: Hammond, Jon
name: Hernandez, Betty
name: Hicks, Lucille
name: Grant, Laura
name: Turner, Julie
name: Durham, Kim
name: Everson, Merlene
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: xaw

description: This recording continues the earlier discussion and recollection of childhood events on Weatherwax Ranch. One of the speakers spends extended time talking about the day she was born and the home where she was born. This b-roll also features discussion of one of the speakers reminiscing about her birthplace as well as another speaker discussing his employment on the ranch.
Spectroscopy and dynamics in helium nanodroplets
Creators: name: Stienkemeier, Frank
name: Lehmann, Kevin K
Publisher: name: arXiv
Year: 2006
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Atomic and Molecular Clusters (physics.atm-clus)
subject: FOS: Physical sciences

description: This article provides a review of recent work in the field of helium nanodroplet spectroscopy with emphasis on the dynamical aspects of the interactions between molecules in helium as well as their interaction with this unique quantum solvent. Emphasis is placed on experimental methods and studies introducing recent new approaches, in particular including time-resolved techniques. Corresponding theoretical results on the energetics and dynamics of helium droplets are also discussed.
description: 50 pages including 11 figures
1 Brief an [Hans Georg Nägeli]
Brief an Nägeli ...
Creators: name: Schnyder von Wartensee, Franz Xaver
Publisher: name: [s.n.]
Year: 1809

description: von [Franz] Xaver [Schnyder von Wartensee]
description: Abschrift von Hermann Nägeli; Originalbrief in Ms V 455.2.3
title: Il G8 e il G20: Istituzioni globali in un mondo in difficoltà
Creators: name: Archi, Bruno
Publisher: name: Edizioni Ca' Foscari - Digital Publishing
Year: 2015

description: La riflessione in corso su un tema di politica estera di spiccato rilievo quale il G8 e il G20 scaturisce dalla sempre maggiore centralità dei tentativi da parte della comunità internazionale di contenere gli effetti della crisi globale e rilanciare una crescita economica forte, equilibrata e sostenibile. In questa prospettiva, appare opportuno non solo soffermarsi sulla nascita, sullo sviluppo e sull’organizzazione di questi due fori internazionali, ma anche comprendere in che misura il G8 e il G20 siano riusciti a raggiungere gli obiettivi per i quali sono stati inizialmente concepiti.
description: Ricerche giuridiche, 3 | 1 | 2014
Holonomy restrictions from the curvature operator of the second kind
Creators: name: Nienhaus, Jan
name: Petersen, Peter
name: Wink, Matthias
name: Wylie, William
Publisher: name: arXiv
Year: 2022
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53B20, 53B35, 53C29

description: We show that an $n$-dimensional Riemannian manifold with $n$-nonnegative or $n$-nonpositive curvature operator of the second kind has restricted holonomy $SO(n)$ or is flat. The result does not depend on completeness and can be improved provided the space is Einstein or Kähler. In particular, if a locally symmetric space has $n$-nonnegative or $n$-nonpositive curvature operator of the second kind, then it has constant curvature. When the locally symmetric space is irreducible this can be improved to $\frac{3n}{2}\frac{n+2}{n+4}$-nonnegative or $\frac{3n}{2}\frac{n+2}{n+4}$-nonpositive curvature operator of the second kind.
description: 10 pages
Around quantum ergodicity
Creators: name: Dyatlov, Semyon
Publisher: name: arXiv
Year: 2021
Subjects: subject: Analysis of PDEs (math.AP)
subject: Mathematical Physics (math-ph)
subject: Spectral Theory (math.SP)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We discuss Shnirelman's Quantum Ergodicity Theorem, giving an outline of a proof and an overview of some of the recent developments in mathematical Quantum Chaos.
description: 18 pages, 3 figures; minor revisions following the referee's comments. To appear special issue of Annales Math\'ematiques du Qu\'ebec in honor of Alexander Shnirelman's 75th birthday
title: Sugli investimenti diretti esteri regolati dai nuovi accordi commerciali dell'Unione europea
Creators: name: De Vido, Sara
name: Marrella, Fabrizio
Publisher: name: Edizioni Ca' Foscari - Digital Publishing
Year: 2015

description: This note is about the new EU exclusive competence over foreign direct investment in light of the ongoing negotiations for Free Trade Agreements with third countries. After presenting the status of negotiations for some agreements, with specific regard to the Transatlantic Trade and Investment Partnership, the authors argue that the European Parliament – by virtue of the enlarged competences obtained thanks to the Lisbon Treaty - will play an important role in safeguarding sensitive sectors of EU economy.
description: Ricerche giuridiche, 3 | 1 | 2014
1 Brief an Hans Georg Nägeli
Brief an Nägeli ...
Creators: name: Schnyder von Wartensee, Franz Xaver
Publisher: name: [s.n.]
Year: 1821

description: von [Franz Xaver] Schnyder [von Wartensee]
description: Brief ohne Jahr, Jahr nachträglich von fremder Hand mit Bleistift notiert
description: Brieftext durch Siegelausriss leicht beschädigt
Passive Realizations of Series Elastic Actuation: Effects of Plant and Controller Dynamics on Haptic Rendering Performance
Creators: name: Kenanoglu, Celal Umut
name: Patoglu, Volkan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: We introduce minimal passive physical equivalents of series (damped) elastic actuation (S(D)EA) under closed-loop control to determine the effect of different plant parameters and controller gains on the closed-loop performance of the system and to help establish an intuitive understanding of the passivity bounds. Furthermore, we explicitly derive the feasibility conditions for these passive physical equivalents and compare them to the necessary and sufficient conditions for the passivity of S(D)EA under velocity sourced impedance control (VSIC) to establish their relationship. Through the passive physical equivalents, we rigorously compare the effect of different plant dynamics (e.g., SEA and SDEA) on the system performance. We demonstrate that passive physical equivalents make the effect of controller gains explicit and establish a natural means for effective impedance analysis. We also show that passive physical equivalents promote co-design thinking by enforcing simultaneous and unbiased consideration of (possibly negative) controller gains and plant parameters. We demonstrate the usefulness of negative controller gains when coupled to properly designed plant dynamics. Finally, we provide experimental validations of our theoretical results and characterizations of the haptic rendering performance of S(D)EA under VSIC.
Out of Equilibrium Majoranas in Interacting Kitaev Chains
Creators: name: Pandey, Bradraj
name: Mohanta, Narayan
name: Dagotto, Elbio
Publisher: name: arXiv
Year: 2022
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We employ a time-dependent real-space local density-of-states method to study the movement and fusion of Majorana zero modes in the 1D interacting Kitaev model, based on the time evolution of many-body states.
 We analyze the dynamics and both fusion channels of Majoranas using time-dependent potentials, either creating {\it Walls} or {\it Wells}. % focusing on the local density-of-states and charge-density of fermions varying with time. For fast moving Majoranas, we unveil non-equilibrium signatures of the ``strong-zero mode'' operator (quasi parity degeneracy in the full spectrum) and its breakdown in the presence of repulsive Coulomb interactions. Focusing on forming a full electron after fusion, we also discuss upper and lower limits on the Majorana speed needed to reduce non-adiabatic effects and to avoid poisoning due to decoherence.
description: 5 figures
Prospects for kilonova signals in the gravitational-wave era
Creators: name: Mochkovitch, Robert
name: Daigne, Frédéric
name: Duque, Raphaël
name: Zitouni, Hannachi
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The binary neutron star merger gravitational-wave signal GW170817 was followed by three electromagnetic counterparts, including a kilonova arising from the radioactivity of freshly synthesized $r$-process elements in ejecta from the merger. Finding kilonovae after gravitational-wave triggers is crucial for (i) the search for further counterparts, such as the afterglow, (ii) probing the diversity of kilonovae and their dependence on the system's inclination angle, and (iii) building a sample for multi-messenger cosmology. During the third observing run of the gravitational-wave interferometer network, no kilonova counterpart was found. We aim to predict the expected population of detectable kilonova signals for the upcoming O4 and O5 observing runs of the LIGO-Virgo-KAGRA instruments. Using a simplified criterion for gravitational-wave detection and a simple GW170817-calibrated model for the kilonova peak magnitude, we determine the rate of kilonovae in reach of follow-up campaigns and their distributions in magnitude for various bands. We briefly consider the case of GW190425, the only binary neutron star merger confirmed since GW170817, and obtain constraints on its inclination angle from the non-detection of its kilonova, assuming the source was below the follow-up thresholds. We also show that non-gravitational-wave-triggered kilonovae can be a numerous class of sources in future surveys and briefly discuss associations with short bright gamma-ray bursts. We finally discuss the detection of the jetted outflow afterglow in addition to the kilonova.
description: 10 pages, 6 figures, published in A&A
Limits on the high-energy gamma and neutrino fluxes from the SGR 1806-20 giant flare of December 27th, 2004 with the AMANDA-II detector
Creators: name: The IceCube Collaboration
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: On December 27th 2004, a giant gamma flare from the Soft Gamma-ray Repeater 1806-20 saturated many satellite gamma-ray detectors. This event was by more than two orders of magnitude the brightest cosmic transient ever observed. If the gamma emission extends up to TeV energies with a hard power law energy spectrum, photo-produced muons could be observed in surface and underground arrays. Moreover, high-energy neutrinos could have been produced during the SGR giant flare if there were substantial baryonic outflow from the magnetar. These high-energy neutrinos would have also produced muons in an underground array. AMANDA-II was used to search for downgoing muons indicative of high-energy gammas and/or neutrinos. The data revealed no significant signal. The upper limit on the gamma flux at 90% CL is dN/dE < 0.05 (0.5) TeV^-1 m^-2 s^-1 for gamma=-1.47 (-2). Similarly, we set limits on the normalization constant of the high-energy neutrino emission of 0.4 (6.1) TeV^-1 m^-2 s^-1 for gamma=-1.47 (-2).
description: 14 pages, 3 figures
title: “Il curioso caso della chiamata in sussidiarietà”: trasfigurazione e distorsione del modello originario
Creators: name: Mancini, Marco
Publisher: name: Edizioni Ca' Foscari - Digital Publishing
Year: 2015

description: The essay analyzes the steps that have marked the evolution of the institution of "call subsidiarity", the main test of the relationship between State and Regions and, more generally, between the demands for autonomy and uniform as a result of the 2001 constitutional reform. The first sentence of the Constitutional Court, no. 303/2003, had developed a model aimed at safeguarding the constitutional powers of the Regions, allowing the latter to intervene actively, on an equal footing with the State, at all stages that comprise the process of attraction in the bodies government administrative functions and the corresponding legislative functions. In subsequent judgments, however, the Constitutional Court has gradually changed its orientation and has reached the elaboration of a model directly rather to favor the prevalence of uniform requirements and consequently the Regions reserve a purely consultative role.
description: Ricerche giuridiche, 3 | 1 | 2014
Schwinger-Keldysh path integral formalism for a Quenched Quantum Inverted Oscillator
Creators: name: Choudhury, Sayantan
name: Dey, Suman
name: Gharat, Rakshit Mandish
name: Mandal, Saptarshi
name: Pandey, Nilesh
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this work, we study the time-dependent behaviour of quantum correlations of a system of an inverted oscillator governed by out-of-equilibrium dynamics using the well-known Schwinger-Keldysh formalism in presence of quantum mechanical quench. Considering a generalized structure of a time-dependent Hamiltonian for an inverted oscillator system, we use the invariant operator method to obtain its eigenstates and continuous energy eigenvalues. Using the expression for the eigenstates, we further derive the most general expression for the generating function as well as the out-of-time-ordered correlators (OTOC) for the given system using this formalism. Further, considering the time-dependent coupling and frequency of the quantum inverted oscillator characterized by quench parameters, we comment on the dynamical behaviour, specifically the early, intermediate and late time-dependent features of the OTOC for the quenched quantum inverted oscillator. Next, we study a specific case, where the system of inverted oscillator exhibits chaotic behaviour by computing the quantum Lyapunov exponent from the time-dependent behaviour of OTOC in presence of the given quench profile.
description: 25 pages, 8 figures, Accepted for publication in Symmetry (Feature Papers 2024: https://www.mdpi.com/journal/symmetry/special_issues/7PP2510774)
Elastic $pp$ and $\bar pp$ scattering in the models of unitarized pomeron
Creators: name: Martynov, E.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Elastic scattering amplitudes dominated by the Pomeron singularity which obey the principal unitarity bounds at high energies are constructed and analyzed. Confronting the models of double and triple (at $t=0$) Pomeron pole (supplemented by some terms responsible for the low energy behaviour) with existing experimental data on $pp$ and $\bar pp$ total and differential cross sections at $\sqrt{s}\geq 5$ GeV and $|t|\leq 6$ GeV$^{2}$ we are able to tune the form of the Pomeron singularity. Actually the good agreement with those data is received for both models though the behaviour given by the dipole model is more preferable in some aspects. The predictions made for the LHC energy values display, however, the quite noticeable difference between the predictions of models at $t\approx -0.4$ GeV$^{2}$. Apparently the future results of TOTEM will be more conclusive to make a true choice.
description: Revtex4, 8 pages, 5 figures. Text is improved, no changes in figures and conclusions. Version to be published in Phys. Rev. D
Weatherwax Ranch
Creators: name: Girado, Luther
name: Hammond, Jon
name: Hernandez, Betty
name: Hicks, Lucille
name: Grant, Laura
name: Turner, Julie
name: Durham, Kim
name: Everson, Merlene
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: xaw

description: This recording contains a discussion about growing up on Weatherwax Ranch; notable references to childhood activities and expectations from the family. The recording also contains instances of foraging for acorns and berries along the trail.
Nonlinearity and wideband parametric amplification in an NbTiN microstrip transmission line
Creators: name: Shu, Shibo
name: Klimovich, Nikita
name: Eom, Byeong Ho
name: Beyer, Andrew
name: Thakur, Ritoban Basu
name: Leduc, Henry
name: Day, Peter
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: The nonlinear response associated with the current dependence of the superconducting kinetic inductance was studied in capacitively shunted NbTiN microstrip transmission lines. It was found that the inductance per unit length of one microstrip line could be changed by up to 20% by applying a DC current, corresponding to a single pass time delay of 0.7 ns. To investigate nonlinear dissipation, Bragg reflectors were placed on either end of a section of this type of transmission line, creating resonances over a range of frequencies. From the change in the resonance linewidth and amplitude with DC current, the ratio of the reactive to the dissipative response of the line was found to be 788. The low dissipation makes these transmission lines suitable for a number of applications that are microwave and millimeter-wave band analogues of nonlinear optical processes. As an example, by applying a millimeter-wave pump tone, very wide band parametric amplification was observed between about 3 and 34 GHz. Use as a current variable delay line for an on-chip millimeter-wave Fourier transform spectrometer is also considered.
description: 8 pages, 8 figures, accepted by Physical Review Research
Substantial magneto-electric coupling near room temperature in Bi2Fe4O9
Creators: name: Singh, A. K.
name: Kaushik, S. D.
name: Kumar, Brijesh
name: Venimadhav, A.
name: Mishra, P. K.
name: Siriguri, V.
name: Patnaik, S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We report remarkable multiferroic effects in polycrystalline Bi2Fe4O9. High-resolution X-ray diffraction shows that this compound has orthorhombic structure. Magnetic measurements confirm an antiferromagnetic transition around 260 K. A pronounced inverse S-shape anomaly in the loss tangent of dielectric measurement is observed near the Neel temperature. This feature shifts with the application of magnetic field. These anomalies are indicative of substantial coupling between the electric and magnetic orders in this compound.
description: 10 pages, 4 figures
Electron interferometry with nano-gratings
Creators: name: Cronin, Alexander D.
name: McMorran, Ben
Publisher: name: arXiv
Year: 2006
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We present an electron interferometer based on near-field diffraction from two nanostructure gratings. Lau fringes are observed with an imaging detector, and revivals in the fringe visibility occur as the separation between gratings is increased from 0 to 3 mm. This verifies that electron beams diffracted by nanostructures remain coherent after propagating farther than the Talbot length $z_T = 2d^2/λ$ = 1.2 mm, and hence is a proof of principle for the function of a Talbot-Lau interferometer for electrons. Distorted fringes due to a phase object demonstrates an application for this new type of electron interferometer.
description: 4 pgs, 6 figures
Interplay of magnetism and band topology in Eu$_{1-x}$Ca$_x$Mg$_2$Bi$_2$ (x=0, 0.5) from first principles study
Creators: name: Choudhury, Amarjyoti
name: Mohanta, N.
name: Maitra, T.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Recent discovery of the time reversal symmetry breaking magnetic Weyl semimetals has created a huge surge of activities in the field of quantum topological materials. In this work, we have studied systematically the ground state magnetic order, electronic structure and the interplay between the magnetic order and band topology in one such materials, EuMg$_2$Bi$_2$ (EMB) and its Ca doped variant using first principles method within the framework of density functional theory (DFT). The detailed investigation unravels the existence of different topological phases in this single material which can be tuned by an external probe such as magnetic field or chemical substitution. Our DFT calculations including Coulomb correlation (U) and spin-orbit (SO) interaction within GGA+U+SO approximation confirms that the magnetic ground state of EMB is A-type Antiferromagnetic (A-AFM) with Eu magnetic moments aligned along the crystallographic $a$ or $b$ direction. Although the ground state of EMB is A-AFM, the Ferromagnetic (FM) state lies very close in energy. We observe a single pair of Weyl points connecting valence and conduction band very close to the Fermi level (FL) along $Γ$-A direction in the FM state of EuMg$_2$Bi$_2$ with Eu moments aligned along crystallographic $c$ direction. On doping 50\% Ca at Eu sites, we observe single pair of Weyl points moving closer to the FL which is highly desirable for application purposes. Further we observe that the separation between the Weyl points in the pair decreases in doped compound compared to that in the parent compound which has direct consequence on anomalous Hall conductivity (AHC). Our first principles calculation of AHC shows high peak values exactly at these Weyl points and the peak height decreases when we dope the system with Ca. Therefore, Ca doping can be a good external handle to tune AHC in this system.
description: 9 pages, 12 figures
Testing CPT Invariance in B^0_d-\bar{B}^0_d and B^0_s-\bar{B}^0_s Oscillations
Creators: name: Ren, Ping
name: Xing, Zhi-zhong
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Recent CDF and D0 measurements of B^0_s-\bar{B}^0_s mixing make it possible to search for CP violation and test CPT symmetry in a variety of B_s decays. Considering both coherent B^0_d\bar{B}^0_d decays at the Υ(4S) resonance and coherent B^0_s\bar{B}^0_s decays at the Υ(5S) resonance, we formulate their time-dependent and time-integrated rates by postulating small CPT violation in B^0_d-\bar{B}^0_d and B^0_s-\bar{B}^0_s oscillations. We show that the opposite-sign dilepton events from either C-odd or C-even B^0_q\bar{B}^0_q states (for q = d or s) can be used to determine or constrain the CPT-violating parameter at a super-B factory. The possibility of distinguishing between the effect of CPT violation and that of ΔB = -ΔQ transitions is also discussed.
description: LaTex 12 pages. A minor change. Accepted for publication in Phys. Rev. D
1 Brief an [Hans Georg Nägeli]
Brief an Nägeli ...
Creators: name: Schnyder von Wartensee, Franz Xaver
Publisher: name: [s.n.]
Year: 1811

description: von [Franz] Xaver [Schnyder von Wartensee]
description: Abschrift von Hermann Nägeli; Originalbrief in Ms V 455.2.5
title: Note minime a margine delle recenti modifiche normative in tema di cambiali finanziarie
Creators: name: Paganin, Riccardo
Publisher: name: Edizioni Ca' Foscari - Digital Publishing
Year: 2015

description: The article provides an overview of the Italian legal framework regulating the “cambiali finanziarie” (debt instruments similar to the commercial papers introduced under the UK and US legal system) as resulting from the reform occurred in 2012. Particular attention is reserved to the amendments made to the provisions concerning the issue and the transfer of the “cambiali finanziarie” with a special focus on the possibility of such instruments being issued under a dematerialisation regime (i.e., without being represented by a physical document).
description: Ricerche giuridiche, 3 | 1 | 2014
A Combination 5-DOF Active Magnetic Bearing For Energy Storage Flywheel
Creators: name: Li, Xiaojun
name: Palazzolo, Alan
name: Wang, Zhiyang
Publisher: name: arXiv
Year: 2021
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Conventional active magnetic bearing (AMB) systems use several separate radial and thrust bearings to provide a 5 degree of freedom (DOF) levitation control. This paper presents a novel combination 5-DOF active magnetic bearing (C5AMB) designed for a shaft-less, hub-less, high-strength steel energy storage flywheel (SHFES), which achieves doubled energy density compared to prior technologies. As a single device, the C5AMB provides radial, axial, and tilting levitations simultaneously. In addition, it utilizes low-cost and more available materials to replace silicon steels and laminations, which results in reduced costs and more convenient assemblies. Apart from the unique structure and the use of low magnetic grade material, other design challenges include shared flux paths, large dimensions, and relatively small air gaps. The finite element method (FEM) is too computationally intensive for early-stage analysis. An equivalent magnetic circuit method (EMCM) is developed for modeling and analysis. Nonlinear FEM is then used for detailed simulations. Both permanent magnets (PM) and electromagnetic control currents provide the weight-balancing lifting force. During the full-scale prototype testing, the C5AMB successfully levitates a 5440 kg and 2 m diameter flywheel at an air gap of 1.14 mm. Its current and position stiffnesses are verified experimentally.
description: 12 pages, in IEEE Transactions on Transportation Electrification
Data-driven Thermal Anomaly Detection for Batteries using Unsupervised Shape Clustering
Creators: name: Li, Xiaojun
name: Li, Jianwei
name: Abdollahi, Ali
name: Jones, Trevor
Publisher: name: arXiv
Year: 2021
Subjects: subject: Systems and Control (eess.SY)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: For electric vehicles (EV) and energy storage (ES) batteries, thermal runaway is a critical issue as it can lead to uncontrollable fires or even explosions. Thermal anomaly detection can identify problematic battery packs that may eventually undergo thermal runaway. However, there are common challenges like data unavailability, environment and configuration variations, and battery aging. We propose a data-driven method to detect battery thermal anomaly based on comparing shape-similarity between thermal measurements. Based on their shapes, the measurements are continuously being grouped into different clusters. Anomaly is detected by monitoring deviations within the clusters. Unlike model-based or other data-driven methods, the proposed method is robust to data loss and requires minimal reference data for different pack configurations. As the initial experimental results show, the method not only can be more accurate than the onboard BMS and but also can detect unforeseen anomalies at the early stage.
description: 6 pages
The Unruh effect revisited
Creators: name: De Bievre, S.
name: Merkli, M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 81T20

description: We give a complete and rigorous proof of the Unruh effect, in the following form. We show that the state of a two-level system, uniformly accelerated with proper acceleration $a$, and coupled to a scalar bose field initially in the Minkowski vacuum state will converge, asymptotically in the detector's proper time, to the Gibbs state at inverse temperature $β=\frac{2π}{a}$. The result also holds if the field and detector are initially in an excited state. We treat the problem as one of return to equilibrium, exploiting in particular that the Minkowski vacuum is a KMS state with respect to Lorentz boosts. We then use the recently developed spectral techniques to prove the stated result.
Three-loop four-particle QCD amplitudes
Creators: name: Bargiela, Piotr
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present recent advancements in the computation of three-loop four-particle helicity amplitudes in full-color massless QCD. In this contribution, we focus on the $gg \to γγ$ process. We show how to obtain compact analytic formulae for the three-loop scattering amplitude. Our results can be expressed in terms of harmonic polylogarithms, which allows for an efficient numerical evaluation. The results presented here can be used for improving theoretical predictions relevant for Higgs physics at hadron colliders.
description: 6 pages, 1 figure, ICHEP 2022
Machine-learning based methodologies for 3d x-ray measurement, characterization and optimization for buried structures in advanced ic packages
Creators: name: Pahwa, Ramanpreet S
name: Ho, Soon Wee
name: Qin, Ren
name: Chang, Richard
name: Min, Oo Zaw
name: Jie, Wang
name: Rao, Vempati Srinivasa
name: Nwe, Tin Lay
name: Yang, Yanjing
name: Neumann, Jens Timo
name: Pichumani, Ramani
name: Gregorich, Thomas
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: For over 40 years lithographic silicon scaling has driven circuit integration and performance improvement in the semiconductor industry. As silicon scaling slows down, the industry is increasingly dependent on IC package technologies to contribute to further circuit integration and performance improvements. This is a paradigm shift and requires the IC package industry to reduce the size and increase the density of internal interconnects on a scale which has never been done before. Traditional package characterization and process optimization relies on destructive techniques such as physical cross-sections and delayering to extract data from internal package features. These destructive techniques are not practical with today's advanced packages. In this paper we will demonstrate how data acquired non-destructively with a 3D X-ray microscope can be enhanced and optimized using machine learning, and can then be used to measure, characterize and optimize the design and production of buried interconnects in advanced IC packages. Test vehicles replicating 2.5D and HBM construction were designed and fabricated, and digital data was extracted from these test vehicles using 3D X-ray and machine learning techniques. The extracted digital data was used to characterize and optimize the design and production of the interconnects and demonstrates a superior alternative to destructive physical analysis. We report an mAP of 0.96 for 3D object detection, a dice score of 0.92 for 3D segmentation, and an average of 2.1um error for 3D metrology on the test dataset. This paper is the first part of a multi-part report.
description: 7 pages, 9 figures
Dynamic instability transitions in 1D driven diffusive flow with nonlocal hopping
Creators: name: Ha, Meesoon
name: Park, Hyunggyu
name: Nijs, Marcel den
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: One-dimensional directed driven stochastic flow with competing nonlocal and local hopping events has an instability threshold from a populated phase into an empty-road (ER) phase. We implement this in the context of the asymmetric exclusion process. The nonlocal skids promote strong clustering in the stationary populated phase. Such clusters drive the dynamic phase transition and determine its scaling properties. We numerically establish that the instability transition into the ER phase is second order in the regime where the entry point reservoir controls the current and first order in the regime where the bulk is in control. The first order transition originates from a turn-about of the cluster drift velocity. At the critical line, the current remains analytic, the road density vanishes linearly, and fluctuations scale as uncorrelated noise. A self-consistent cluster dynamics analysis explains why these scaling properties remain that simple.
description: 11 pages, 14 figures (25 eps files); revised as the publised version