cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Flat Bands in Three-dimensional Lattice Models with Non-trivial Hopf Index
Creators: name: Dutta, Ivan
name: Saha, Kush
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We report the presence of exactly and nearly flat bands with non-trivial topology in three-dimensional (3D) lattice models. We first show that an exactly flat band can be realized in a 3D lattice model characterized by a 3D topological invariant, namely Hopf invariant. In contrast, we find another distinct 3D model, exhibiting both 2D Chern and 3D Hopf invariant, namely Hopf-Chern insulator, that can host nearly or perfect flat bands across different 2D planes. Such a Hopf-Chern model can be constructed by introducing specific hopping along the orthogonal direction of a simple two-orbital 2D Chern insulator in the presence of in-plane nearest-neighbor and next-nearest hopping among different orbitals. While the Chern planes host nearly perfect flat bands, the orthogonal planes can host both perfect or nearly perfect flat bands with zero Chern number at some special parameter values. Interestingly, such a 3D lattice construction from 2D allows finite Hopf invariant too. Finally, we show that higher Chern models can also be constructed in the same lattice setup with only nearest and next-nearest hopping, but the appearance of flat bands along high-symmetric path in the Brillouin zone requires longer-range hopping. We close with a discussion on possible experimental platforms to realize the models.
description: 24 pages, 11 figures
Backscattering and Hong-Ou-Mandel Manifolds in Microring Resonators
Creators: name: Kaulfuss, Peter L.
name: Alsing, Paul M.
name: Birrittella, Richard J.
name: Vitullo, Dashiell L. P.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We investigate the effect of backscattering on the Hong-Ou-Mandel manifold (HOMM) that manifests in double-bus mircoring resonators (MRRs). The HOMM represents higher-dimensional parameter solutions for the complete destructive interference of coincident detection in the HOM effect. To model the backscattering, we introduce a set of internal `beam splitters' inside the ring that allow photons to `reflect' into new counter-propagating modes inside the MRR. We find that the one-dimensional HOMM in MRRs investigated here is extremely robust against deterioration due to backscattering, even in a linear chain of identical MRRs. Further we find that a small amount of backscattering introduced into a chain of non-identical MRRs connected in parallel could be desirable, causing them to behave more like chain of identical MRRs.
description: 18 pages, 15 figures
Algebraic K$_0$ for unpointed Categories
Creators: name: Küng, Felix
Publisher: name: arXiv
Year: 2023
Subjects: subject: K-Theory and Homology (math.KT)
subject: Group Theory (math.GR)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 20N10, 16E20, 18F25, 18N25

description: We construct a natural generalization of the Grothendieck group $\mathrm{K}_0$ to the case of possibly unpointed categories admitting pushouts by using the concept of heaps recently introduced by Brezinzki. In case of a monoidal category, the defined $\mathrm{K}_0$ is shown to be a truss. It is shown that the construction generalizes the classical $\mathrm{K}_0$ of an abelian category as the group retract along the isomorphism class of the zero object. We finish by applying this construction to construct the integers with addition and multiplication as the decategorification of finite sets and show that in this $\mathrm{K}_0\left(\underline{\mathrm{Top}}\right)$ one can identify a CW-complex with the iterated product of its cells.
description: 11 pages, accepted version at the Journal of Algebra and its Applications (JAA)
Automatic Generation of Conversational Interfaces for Tabular Data Analysis
Creators: name: Gomez-Vazquez, Marcos
name: Cabot, Jordi
name: Clarisó, Robert
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences
subject: I.2.7; D.2

description: Tabular data is the most common format to publish and exchange structured data online. A clear example is the growing number of open data portals published by public administrations. However, exploitation of these data sources is currently limited to technical people able to programmatically manipulate and digest such data. As an alternative, we propose the use of chatbots to offer a conversational interface to facilitate the exploration of tabular data sources, including support for data analytics questions that are responded via charts rendered by the chatbot. Moreover, our chatbots are automatically generated from the data source itself thanks to the instantiation of a configurable collection of conversation patterns matched to the chatbot intents and entities.
description: 6 pages, 5 figures
Proximity Labelling Assays to Detect Protein Interactions in Cells
Creators: name: Bar, Daniel
Publisher: name: Zenodo
Year: 2024
Subjects: subject: Proximity ligation assay
subject: Proteins
subject: Biological interactions
subject: Proteins interactions
subject: Bioimaging

description: Protein functionality is intricately linked to their assemblies and interactions, which exhibit complex spatial and temporal organization within cells. To better understand protein function, it's often beneficial to analyze proteins alongside their neighboring molecules. However, protein-protein interactions occur across a wide spectrum of affinity and duration. Proximity labeling offers an alternative approach by targeting proteins near the molecule of interest, regardless of their binding affinity. We will review current proximity labeling techniques and outline a protocol for antibody-directed tag deposition in fixed and permeabilized cell lines and primary human tissue samples.
Efficient quantum algorithms for stabilizer entropies
Creators: name: Haug, Tobias
name: Lee, Soovin
name: Kim, M. S.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Stabilizer entropies (SEs) are measures of nonstabilizerness or `magic' that quantify the degree to which a state is described by stabilizers. SEs are especially interesting due to their connections to scrambling, localization and property testing. However, applications have been limited so far as previously known measurement protocols for SEs scale exponentially with the number of qubits. Here, we efficiently measure SEs for integer Rényi index $n>1$ via Bell measurements. The SE of $N$-qubit quantum states can be measured with $O(n)$ copies and $O(nN)$ classical computational time, where for even $n$ we additionally require the complex conjugate of the state. We provide efficient bounds of various nonstabilizerness monotones which are intractable to compute beyond a few qubits. Using the IonQ quantum computer, we measure SEs of random Clifford circuits doped with non-Clifford gates and give bounds for the stabilizer fidelity, stabilizer extent and robustness of magic. We provide efficient algorithms to measure Clifford-averaged $4n$-point out-of-time-order correlators and multifractal flatness. With these measures we study the scrambling time of doped Clifford circuits and random Hamiltonian evolution depending on nonstabilizerness. Counter-intuitively, random Hamiltonian evolution becomes less scrambled at long times which we reveal with the multifractal flatness. Our results open up the exploration of nonstabilizerness with quantum computers.
description: 26 pages, 14 figures
A hyper-Kähler metric on the moduli spaces of monopoles with arbitrary symmetry breaking
Creators: name: Mendizabal, Jaime
Publisher: name: arXiv
Year: 2023
Subjects: subject: Differential Geometry (math.DG)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 53C07 (Primary), 53C26, 58J20 (Secondary)

description: We construct the hyper-Kähler moduli space of framed monopoles over $\mathbb{R}^3$ for any connected, simply connected, compact, semisimple Lie group and arbitrary mass and charge, and hence symmetry breaking. In order to do so, we define a configuration space of pairs with appropriate asymptotic conditions and perform an infinite-dimensional quotient construction. We make use of the b and scattering calculuses to study the relevant differential operators.
description: 43 pages, 2 figures. Updated with minor changes and corrections to match the version published in Annals of Global Analysis and Geometry
Hertz-linewidth and frequency-agile photonic integrated extended-DBR lasers
Creators: name: Siddharth, Anat
name: Attanasio, Alaina
name: Lihachev, Grigory
name: Zhang, Junyin
name: Qiu, Zheru
name: Kenning, Scott
name: Wang, Rui Ning
name: Bhave, Sunil A.
name: Riemensberger, Johann
name: Kippenberg, Tobias J.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Optics (physics.optics)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Recent advances in the development of ultra-low loss silicon nitride (Si3N4)-based photonic integrated circuits have allowed integrated lasers to achieve a coherence exceeding those of fiber lasers and enabled unprecedentedly fast (Megahertz bandwidth) tuning using monolithically integrated piezoelectrical actuators. While this marks the first time that fiber laser coherence is achieved using photonic integrated circuits, in conjunction with frequency agility that exceeds those of legacy bulk lasers, the approach is presently compounded by the high cost of manufacturing DFB, as required for self-injection locking, as well as the precise control over the laser current and temperature to sustain a low noise locked operation. Reflective semiconductor optical amplifiers (RSOA) provide a cost-effective alternative solution but have not yet achieved similar performance in coherence or frequency agility, as required for frequency modulated continuous wave (FMCW) LiDAR, laser locking in frequency metrology or wavelength modulation spectroscopy for gas sensing. Here, we overcome this challenge and demonstrate an RSOA-based and frequency agile integrated laser tuned with high speed, good linearity, high optical output power, and turn-key operability while maintaining a small footprint. This is achieved using a tunable extended distributed Bragg reflector (E-DBR) in an ultra-low loss 200 nm thin Si3N4 platform with monolithically integrated piezoelectric actuators. We co-integrate the DBR with a compact ultra-low loss spiral resonator to further reduce the intrinsic optical linewidth of the laser to the Hertz level -- on par with the noise of a fiber laser -- via self-injection locking.
description: 9 pages, 4 figures
title: Umweltfreundliche Beschaffung
title: Umweltfreundliche Beschaffung: Schulungsskript 3
titleType: AlternativeTitle
Creators: name: Müller, Ria
name: Hermann, Andreas
Publisher: name: Umweltbundesamt
Year: 2019
Subjects: Umweltfreundliche Beschaffung
Umweltbewusstsein

description: Als ein Haupthindernis für die Berücksichtigung umweltbezogener Anforderungen in der öffentlichen Beschaffung wird oft eine mangelnde Verfügbarkeit von leicht zugänglichen, verlässlichen, aktuellen und marktfähigen Produktanforderungen bzw. Umweltkriterien genannt, die für eine Vergabe genutzt werden können. Da es den Mitarbeiterinnen und Mitarbeitern der öffentlichen Verwaltung in der Regel nicht möglich sein wird, Umweltschutzanforderungen an Produkte und Dienstleistungen selbst zu entwickeln, besteht ein sinnvoller und effizienter Weg darin, auf die im Rahmen von Umweltzeichen entwickelten Kriterien zurückzugreifen. Dieses Schulungsskript zeigt Möglichkeiten auf, wie Kriterien aus Gütezeichen oder Gütezeichen selbst in Ausschreibungsunterlagen integriert werden können. Quelle: https://www.umweltbundesamt.de
title: Percorsi di territorializzazione di spazi pubblici interstiziali a Firenze
title: Territorialization of interstitial public spaces in Florence
titleType: AlternativeTitle
Creators: name: MANCINI, NICCOLO'
Publisher: name: Università degli Studi di Roma "Tor Vergata"
Year: 2010
Subjects: subject: spazio pubblico; spazio pubblico interstiziale; territorializzazione; Firenze; ricerca empirica; ricerca qualitativa; ricerca quantitativa
subject: spazio pubblico
subject: spazio pubblico interstiziale
subject: territorializzazione
subject: Firenze
subject: ricerca empirica
subject: ricerca qualitativa
subject: ricerca quantitativa

description: 22. ciclo
description: Capitolo 1 1.0 - Spazio pubblico 1.1 - Il concetto di “spazio 1.2 - Il concetto di “pubblico 1.3 - Lo spazio pubblico 1.4 - La sfera pubblica 1.5 - Territorializzazione e simbolizzazione dello spazio pubblico . - Capitolo 2 2.0 - Spazi pubblici Interstiziali. - Capitolo 3 3.0 - Metodologia 3.1 - Scelta del procedimento analitico 3.2 - L’osservazione 3.3 - L’intervista Semistrutturata. - Capitolo 4 4.0 – L’indagine 4.1 – I luoghi indagati 4.1.1 – Il sottopassaggio delle cure 4.1.1.1 – Le cure – cenni storici 4.1.2 – La strettoia di via R. Giuliani – il sodo 4.1.2.1 – Castello – cenni storici 4.1.3 – Le mattonelle rosse di viale Morgagni 4.1.3.1 – Rifredi – cenni storici 4.1.4 - Il muretto di via Il prato 4.1.4.1 – Il prato – cenni storici 4.1.5 – La curva del poggetto 4.1.5.1 – Il poggetto – cenni storici 4.2 – Elementi fisici e non materiali simbolizzati 4.3 – Strategie implicite per la risoluzione dei confliti per lo spazio 4.4 – Perdita del legame tra spazio pubblici e la sfera pubblica. - Capitolo 5 5.0 - Conclusioni
Technology data and costs for gas grids in the context of a Smart Energy System
Creators: name: Skov, Iva Ridjan
name: Schneider, Noémi
Publisher: name: Zenodo
Year: 2021

description: The decarbonisation of the gas grids will be an integrated part of the future Smart Energy Systems. Gas is not just natural gas: it can also be renewable gas, produced from various feedstocks in the forms of biogas, biomethane, hydrogen or synthetic gas. Renewable gas can also be produced from excess electricity generated by variable renewable sources (such as solar and wind). The existing natural gas transport and distribution infrastructure is well developed and interconnected in Europe. Almost all member states have a natural gas distribution system, although in the Eastern EU countries gas infrastructure is mainly based on gas transit business and not domestic applications. Green hydrogen from renewable sources such as renewable electricity (via electrolysis) or from biomass (via gasification) is currently produced in small volumes that allow blending shares with methane and using existing gas infrastructure for pipeline transport. Currently existing dedicated hydrogen transport infrastructures are industrial clusters in Belgium, North of France and the
 Netherlands. Some projects have tested the viability of conversion of the pipeline and underground storage from natural gas to hydrogen. Current investments in large natural gas infrastructure are mainly driven by security of gas supply objectives, wholesale markets’ integration and shifts in gas supply. Some of these investments are questionable as it is expected that the existing gas infrastructure can cope with the future gas demands. However, the need and role for this infrastructure will likely change in the future, because of the need for increased security of supply or increased electrification in the heating sector. In most of the scenarios, the development of the gas networks and related storages will be strongly linked to power‐to‐gas technologies that can integrate more renewable energy and use the grids as chemical storage.
Large deviations of return times and related entropy estimators on shift spaces
Creators: name: Cuneo, Noé
name: Raquépas, Renaud
Publisher: name: arXiv
Year: 2023
Subjects: subject: Probability (math.PR)
subject: Mathematical Physics (math-ph)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 37B20, 60F10 (Primary), 37A35, 37D35, 94A17 (Secondary)

description: We prove the large deviation principle for several entropy and cross entropy estimators based on return times and waiting times on shift spaces over finite alphabets. We consider shift-invariant probability measures satisfying some decoupling conditions which imply no form of mixing nor ergodicity. We establish precise relations between the rate functions of the different estimators, and between these rate functions and the corresponding pressures, one of which is the Rényi entropy function. For the most commonly used definition of return times, the large-deviation rate function is proved to be nonconvex, except in marginal cases. The results apply in particular to irreducible Markov chains, equilibrium measures for Bowen-regular potentials, g-measures, invariant Gibbs states for absolutely summable interactions in statistical mechanics, and also to probability measures which may be far from Gibbsian, including some hidden Markov models and repeated quantum measurement processes.
description: Minor corrections, additions and clarifications. Updated references
Turbulence profiling for free-space optical communication at the Australian National University
Creators: name: Birch, Marcus
name: Bennet, Francis
name: Copeland, Michael
name: Doucet, Nicolas
name: Grosse, Doris
name: Travouillon, Tony
Publisher: name: Proceedings of the COAT-2023 Workshop (Communications and Observations through Atmospheric Turbulence). Durham, UK, 29-31 March 2025
Year: 2023

description: Atmospheric turbulence characterization and mitigation are essential for the effective implementation of Free Space Optical Communication (FSOC) systems, particularly those employing adaptive optics techniques such as high bit rate coherent modulation and quantum key distribution. Turbulence profiling, which involves measuring turbulence across varying altitudes, offers a more comprehensive understanding compared to standard seeing monitors, enabling advanced adaptive optics and the potential for forecasting atmospheric conditions. The Australian National University is undergoing significant work to develop turbulence profiling instruments with the explicit purpose of supporting FSOC. We have developed a Ring-Image Next Generation Scintillation Sensor (RINGSS) instrument which utilizes a novel method for profiling turbulence through defocused ring images, as introduced by A. Tokovinin (2021).1 RINGSS offers a cost-effective, compact, and fully automated design, necessitating less intricate equipment compared to earlier turbulence profiling instruments. We have also designed and built a generalised Stereo-SCIDAR instrument which has been commissioned on the ANU 2.3 m telescope. Preliminary parallel observations of ANUs RINGSS and SCIDAR instruments are presented, with an outline for future work that includes rigorous cross-calibration. A RINGSS instrument will also be used to undertake a site-selection and characterisation campaign in French Polynesia, and for further sites around Australia and New Zealand to support the future Australasian Optical Ground Station Network.
Revue européenne de recherches sur la poésie. 2015, n° 1
Creators: name: (:Unap)
Publisher: name: Classiques Garnier
Year: 2015
Subjects: subject: Littérature européenne
subject: Poésie européenne
subject: Unité de la république des lettres européennes
subject: Rimbaud
subject: Tonko Maroević

description: Contributeurs : Béatrice Bonhomme, Pierre Brunel, Carmen Caro Dugo, Concetta Cavallini, Giovanna De Vincenzo, Giovanni Dotoli, Constantin Frosin, Ralph Heyndels, Geneviève Hodin, Salvatore Francesco Lattarulo, Marcella Leopizzi, Danguolé Melnikiene, Patrick Navaï, Rita Pacilio, Sanja Roić, Josep M. Sala-Valldaura, Eric Sivry, Salah Stétié, Ilda Thomas, Elisa Tinelli, Carlota Vicens-Pujol et Rosario Vitale.
Inappropriate hypnosedative drug use and cognitive impairmentin older patients in acute and ambulatory care: INOMED and EuroAgeism H2020 project findings
Creators: name: Antonenko, Olena
name: Puldova, Karolina
name: Zelinkova, Andrea
name: Halacova, Milada
name: Gresakova, Silvia
name: Brkic, Jovana
name: Fialova, Daniela
Publisher: name: Zenodo
Year: 2022

description: Paper presented at a conference
A characterization of positroids, with applications to amalgams and excluded minors
Creators: name: Bonin, Joseph E.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: A matroid of rank $r$ on $n$ elements is a positroid if it has a representation by an $r$ by $n$ matrix over $\mathbb{R}$, each $r$ by $r$ submatrix of which has nonnegative determinant. Earlier characterizations of connected positroids and results about direct sums of positroids involve connected flats and non-crossing partitions. We prove another characterization of positroids of a similar flavor and give some applications of the characterization. We show that if $M$ and $N$ are positroids and $E(M)\cap E(N)$ is an independent set and a set of clones in both $M$ and $N$, then the free amalgam of $M$ and $N$ is a positroid, and we prove a second result of that type. Also, we identify several multi-parameter infinite families of excluded minors for the class of positroids.
Early-Age-Onset Colorectal Cancer in Canada: Evidence, Issues and Calls to Action
Creators: name: De Vera, Mary
name: Gill, Sharlene
name: Ashamalla, Shady
name: Schiller, Dan
name: Brenner, Darren R.
name: Wong, Clarence
name: Wildgoose, Petra
name: Esplen, Mary Jane
name: Lieu, Christopher
name: Fitzpatrick, Roslyn
name: O’Sullivan, Dylan E.
name: Servidio-Italiano, Filomena
Publisher: name: Multidisciplinary Digital Publishing Institute
Year: 2022

description: The inaugural Early-Age-Onset Colorectal Cancer Symposium was convened in June 2021 to discuss the implications of rapidly rising rates of early-age-onset colorectal cancer (EAO-CRC) in Canadians under the age of 50 and the impactful outcomes associated with this disease. While the incidence of CRC is declining in people over the age of 50 in Canada and other developed countries worldwide, it is significantly rising in younger people. Canadians born after 1980 are 2 to 2.5 times more likely to be diagnosed with CRC before the age of 50 than previous generations at the same age. While the etiology of EAO-CRC is largely unknown, its characteristics differ in many key ways from CRC diagnosed in older people and warrant a specific approach to risk factor identification, early detection and treatment. Participants of the symposium offered directions for research and clinical practice, and developed actionable recommendations to address the unique needs of these individuals diagnosed with EAO-CRC. Calls for action emerging from the symposium included: increased awareness of EAO-CRC among public and primary care practitioners; promotion of early detection programs in younger populations; and the continuation of research to identify unique risk factor profiles, tumour characteristics and treatment models that can inform tailored approaches to the management of EAO-CRC.
Effect of model parameters on the accuracy of wave optics simulations
Creators: name: Bos, Jeremy
Publisher: name: Proceedings of the COAT-2023 Workshop (Communications and Observations through Atmospheric Turbulence). Durham, UK, 29-31 March 2026
Year: 2023
Subjects: OPTICAL SCINTILLATION
WAVE OPTICS SIMULATIONS
BEAM CONTROL
FREE SPACE OPTICAL COMMUNICATIONS

description: Wave Optics Simulations are a useful tool for modeling the effects of atmospheric turbulence on laser beam propagation and imaging. For example in free space optical communication systems it may be desirable to understand the expected scintillation in intensity of a laser with certain divergence characteristics. In works involving these simulations, much effort is devoted to ensuring turbulence models and simulation parameters are highly accurate. In this work we examine a single propagation geometry involving a 1000 nm plane wave propagating over a 5 km with a 1 m outer scale and 5 mm inner scale and both spectral models and simulation parameters varied. We find that between plane wave Rytov numbers between 0 and approximately 2 the variation resulting from any one parameter was less than 2.5 percent of the mean. Parameters include the number of subharmonics and method of compensation, grid sampling rate, inclusion of a Hill bump, locating screens within the source or receive Fresnel zones, number of propagation steps, and increasing the size of the super- Gaussian absorbing boundary. The comparison also holds against phase screens generated using Z-tilt rather than subharmonic compensation that lack an inner and outer scale.
Raising awareness for RDM: The importance of multipliers within the institution
Creators: name: Osterhoff, Anke
name: Koch, Katharina
Publisher: name: Zenodo
Year: 2024

description: Bringing RDM into practice at the institutional level and raising awareness among researchers, administrative and infrastructural stakeholders is challenging. Thus, we placed special focus on the role of voluntary multipliers within the institution. These voluntary multipliers are also referred to as “data champions” [1]and can be considered key actors for raising awareness for RDM among researchers as their peers and can serve to complement the work of professional RDM staff (such as data stewards).
Sampling in the shift-invariant space generated by the bivariate Gaussian function
Creators: name: Romero, José Luis
name: Ulanovskii, Alexander
name: Zlotnikov, Ilya
Publisher: name: arXiv
Year: 2023
Subjects: subject: Functional Analysis (math.FA)
subject: Classical Analysis and ODEs (math.CA)
subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 42C40, 42C30, 94A20, 32A10, 30H05, 30B60

description: We study the space spanned by the integer shifts of a bivariate Gaussian function and the problem of reconstructing any function in that space from samples scattered across the plane. We identify a large class of lattices, or more generally semi-regular sampling patterns spread along parallel lines, that lead to stable reconstruction while having densities close to the critical value given by Landau's limit. At the critical density, we construct examples of sampling patterns for which reconstruction fails.
 In the same vein, we also investigate continuous sampling along non-uniformly scattered families of parallel lines and identify the threshold density of line configurations at which reconstruction is possible. In a remarkable contrast with Paley-Wiener spaces, the results are completely different for lines with rational or irrational slopes.
 Finally, we apply the sampling results to Gabor systems with bivariate Gaussian windows. As a main contribution, we provide a large list of new examples of Gabor frames with non-complex lattices having volume close to 1.
description: Extension to other generators (including hyperbolic secant) added in Sec. 8
Performance Evaluation of Transport Protocols and Roadmap to a High-Performance Transport Design for Immersive Applications
Creators: name: Ali, Inayat
name: Hong, Seungwoo
name: Park, Pyung-koo
name: Kim, Tae Yeon
Publisher: name: arXiv
Year: 2023
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Immersive technologies such as virtual reality (VR), augmented reality (AR), and holograms will change users' digital experience. These immersive technologies have a multitude of applications, including telesurgeries, teleconferencing, Internet shopping, computer games, etc. Holographic-type communication (HTC) is a type of augmented reality media that provides an immersive experience to Internet users. However, HTC has different characteristics and network requirements, and the existing network architecture and transport protocols may not be able to cope with the stringent network requirements of HTC. Therefore, in this paper, we provide an in-depth and critical study of the transport protocols for HTC. We also discuss the characteristics and the network requirements for HTC. Based on the performance evaluation of the existing transport protocols, we propose a roadmap to design new high-performance transport protocols for immersive applications.
description: Accepted in The 14th International Conference on Ubiquitous and Future Networks (ICUFN 2023), Paris France, July 4-7 2023
Minimal important difference and patient acceptable symptom state for the Numerical Rating Scale (NRS) for pain and the Patient-Rated Wrist/Hand Evaluation (PRWHE) for patients with osteoarthritis at the base of thumb
Creators: name: Stjernberg-Salmela, Susanna
name: Karjalainen, Teemu
name: Juurakko, Joona
name: Toivonen, Pirjo
name: Waris, Eero
name: Taimela, Simo
name: Ardern, Clare
name: Järvinen, Teppo L. N.
name: Jokihaara, Jarkko
Publisher: name: BioMed Central
Year: 2022

description: Background The Numerical Rating Scale (NRS) and Patient-rated wrist/hand evaluation (PRWHE) are patient-reported outcomes frequently used for evaluating pain and function of the wrist and hand. The aim of this study was to determine thresholds for minimal important difference (MID) and patient acceptable symptom state (PASS) for NRS pain and PRWHE instruments in patients with base of thumb osteoarthritis. Methods Fifty-two patients with symptomatic base of thumb osteoarthritis wore a splint for six weeks before undergoing trapeziectomy. NRS pain (0 to 10) and PRWHE (0 to 100) were collected at the time of recruitment (baseline), after splint immobilization prior to surgery, and at 3, 6, 9 and 12 months after surgery. Four anchor-based methods were used to determine MID for NRS pain and PRWHE: the receiver operating characteristics (ROC) curve, the mean difference of change (MDC), the mean change (MC) and the predictive modelling methods. Two approaches were used to determine PASS for NRS pain and PRWHE: the 75th percentile and the ROC curve methods. The anchor question for MID was the change perceived by the patient compared with baseline; the anchor question for PASS was whether the patient would be satisfied if the condition were to stay similar. The correlation between the transition anchor at baseline and the outcome at all time points combined was calculated using the Spearman’s rho analysis. Results The MID for NRS pain was 2.5 using the ROC curve method, 2.0 using the MDC method, 2.8 using the MC method, and 2.5 using the predictive modelling method. The corresponding MIDs for PRWHE were 22, 24, 10, and 20. The PASS values for NRS pain and PRWHE were 2.5 and 30 using the ROC curve method, and 2.0 and 22 using the 75th percentile method, respectively. The area under curve (AUC) analyses showed excellent discrimination for all measures. Conclusion We found credible MID estimates for NRS and PRWHE (including its subscales), although the MID estimates varied depending on the method used. The estimates were 20-30% of the range of scores of the instruments. The cut-offs for MID and PASS showed good or excellent discrimination, lending support for their use in future studies. Trial registration This clinimetrics study was approved by the Helsinki University ethical review board (HUS1525/2017).
Design of unconventional antennas for broadband naval communications
Creators: name: MATTIONI, LORENZO
Publisher: name: Università degli Studi di Roma "Tor Vergata"
Year: 2008
Subjects: subject: broadband antennas; software defined radio; structural antennas; naval antennas
subject: broadband antennas
subject: software defined radio
subject: structural antennas
subject: naval antennas

description: 20. ciclo
Absolute Power Vectors for the Optical LEO Uplink Channel
Creators: name: Carrillo-Flores, Andrea
name: Giggenbach, Dirk
name: Shrestha, Amita
name: Knopp, Marcus T
Publisher: name: Proceedings of the COAT-2023 Workshop (Communications and Observations through Atmospheric Turbulence). Durham, UK, 29-31 March 2027
Year: 2023
Subjects: FREE-SPACE OPTICAL COMMUNICATIONS
ATMOSPHERIC SCINTILLATION
POINTING JITTER
POWER FADING
POWER VECTOR
CHANNEL SIMULATION
PVGET
ELEVATION-DEPENDENT

description: In free-space optical (FSO) communications, modeling the power that is received at the optical detector is advantageous for addressing system improvements in the design of ground- and space-based optical terminals. The Institute of Communications and Navigation at the German Aerospace Center (DLR) has previously developed a power vector generation tool that calculates numerical time series of received power considering the effects of the log-normal distributed atmospheric scintillation and the beta-distributed pointing error due to random jitter of an optical ground station. DLRs tool can be used for different FSO link scenarios. However, the tool has mainly been applied to the satellite-to-ground (downlink) scenario for a given satellite elevation. In this work, DLRs power vector generation tool is applied to generate time series of received power for the optical ground-to-satellite (uplink) scenario for a satellite pass of a LEO satellite at an ISS-like orbit with an elevation range of 0 to 90. The procedure for obtaining the input variables for the power vector generation tool is described and the resulting time series of received power are presented. The results can be used to design fading mitigation techniques for the optical LEO uplink channel.
Engineering mobility in quasiperiodic lattices with exact mobility edges
Creators: name: Wang, Zhenbo
name: Zhang, Yu
name: Wang, Li
name: Chen, Shu
Publisher: name: arXiv
Year: 2023
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We investigate the effect of an additional modulation parameter $δ$ on the mobility properties of quasiperiodic lattices described by a generalized Ganeshan-Pixley-Das Sarma model with two on site modulation parameters. For the case with bounded quasiperiodic potential, we unveil the existence of self-duality relation, independent of $δ$. By applying Avila's global theory, we analytically derive Lyapunov exponents in the whole parameter space, which enables us to determine mobility edges or anomalous mobility edges exactly. Our analytical results indicate that the mobility edge equation is described by two curves and their intersection with the spectrum gives the true mobility edge. Tuning the strength parameter $δ$ can change the spectrum of the quasiperiodic lattice, and thus engineers the mobility of quasi-periodic systems, giving rise to completely extended, partially localized, and completely localized regions. For the case with unbounded quasiperiodic potential, we also obtain the analytical expression of the anomalous mobility edge, which separates localized states from critical states. By increasing the strength parameter $δ$, we find that the critical states can be destroyed gradually and finally vanishes.
description: 10 pages,6 figures
Analisi statica delle volte a crociera in muratura
Creators: name: FABIANI, FRANCESCA MARIA
Publisher: name: Università degli Studi di Roma "Tor Vergata"
Year: 2008
Subjects: subject: volte a crociera; lesioni di Sabouret; analisi statica; cinematica; minima spinta; quadri fessurativi
subject: volte a crociera
subject: lesioni di Sabouret
subject: analisi statica
subject: cinematica
subject: minima spinta
subject: quadri fessurativi

description: 18. ciclo
A class of space-time discretizations for the stochastic $p$-Stokes system
Creators: name: Le, Kim-Ngan
name: Wichmann, Jörn
Publisher: name: arXiv
Year: 2023
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 35K55, 35K65, 35K67, 35R60, 34K28, 65C30, 60H15

description: The main objective of the present paper is to construct a new class of space-time discretizations for the stochastic $p$-Stokes system and analyze its stability and convergence properties.
 We derive regularity results for the approximation that are similar to the natural regularity of solutions. One of the key arguments relies on discrete extrapolation that allows to relate lower moments of discrete maximal processes.
 We show that, if the generic spatial discretization is constraint conforming, then the velocity approximation satisfies a best-approximation property in the natural distance.
 Moreover, we present an example such that the resulting velocity approximation converges with rate $1/2$ in time and $1$ in space towards the (unknown) target velocity with respect to the natural distance. The theory is corroborated by numerical experiments.
description: 52 pages, 3 figures
Fast-oscillating random perturbations of Hamiltonian systems
Creators: name: Yan, Shuo
Publisher: name: arXiv
Year: 2023
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 37J40, 60F17

description: We consider coupled slow-fast stochastic processes, where the averaged slow motion is given by a two-dimensional Hamiltonian system with multiple critical points. On a proper time scale, the evolution of the first integral converges to a diffusion process on the corresponding Reeb graph, with certain gluing conditions specified at the interior vertices, as in the case of additive white noise perturbations of Hamiltonian systems considered by M. Freidlin and A. Wentzell. The current paper provides the first result where the motion on a graph and the corresponding gluing conditions appear due to the averaging of a slow-fast system, with a Hamiltonian structure, on a large time scale. The result allows one to consider, for instance, long-time diffusion approximation for an oscillator with a potential with more than one well.
Connectivity gaps among matroids with the same enumerative invariants
Creators: name: Bonin, Joseph E.
name: Long, Kevin
Publisher: name: arXiv
Year: 2023
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05B35

description: Many important enumerative invariants of a matroid can be obtained from its Tutte polynomial, and many more are determined by two stronger invariants, the $\mathcal{G}$-invariant and the configuration of the matroid. We show that the same is not true of the most basic connectivity invariants. Specifically, we show that for any positive integer $n$, there are pairs of matroids that have the same configuration (and so the same $\mathcal{G}$-invariant and the same Tutte polynomial) but the difference between their Tutte connectivities exceeds $n$, and likewise for vertical connectivity and branch-width. The examples that we use to show this, which we construct using an operation that we introduce, are transversal matroids that are also positroids.
Supplementary document for Anisotropic quantum transport in a programmable photonic topological insulator - 7237910.pdf
Creators: name: Ma, Anqi
name: Dai, Tianxiang
name: Mao, Jun
name: Fu, Zhaorong
name: Yang, Yan
name: Hu, Xiaoyong
name: Gong, Qihuang
name: Wang, Jianwei
Publisher: name: Optica Publishing Group
Year: 2024
Subjects: Uncategorized

description: A Latex file.
TCC
Creators: name: Siqueira Souza Souto, Myrella
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 400308
subject: Medical devices

description: The main objective is to analyze the existing scientific literature, consolidatingevidence related to the effects of these therapies in the treatment of vaginal laxity inwomen. The data sources examined included PUBMED, BVS, Cochrane Library, PMCEurope, and PMC Central, from 10/02/23 to 10/10/23. Indexing terms from DeCS(Radiofrequency Therapy, Electromagnetic Fields, etc.) and MeSH (Vagina,Radiofrequency Therapy, etc.) were employed to ensure a comprehensivesearch. Potential limitations have been acknowledged, such as the restrictedavailability of studies in certain languages. In the selection process, 299 articles wereinitially identified, and were rigorously screened according to criteria such as thematicrelevance, date of publication, type of study, language, and methodologicalquality. After screening, 7 studies were included in the final analysis. Data collectioninvolved a critical evaluation of the methodological quality, study design, and statisticalmethods used in the selected articles. The synthesis of the data revealed insights intothe effects of radiofrequency and electromagnetic field on vaginal sagging, highlightingconsistent patterns and areas of divergence. The findings point to the need for moreresearch, although evidence suggests potential benefits of these therapies. Theclinical utility of these results lies in guiding health professionals on the efficacy ofthese approaches in the treatment of vaginal sagging in women.
title: Cyclo-Static Scheduling of Large Grain Dataflow Algorithms on a Local Area ATAMM Multicomputing Testbed
Creators: name: Roy, Sudeepto
Publisher: name: Old Dominion University
publisherIdentifier: https://ror.org/04zjtrb98
publisherIdentifierScheme: ROR
Year: 1993

description: A strategy for cyclo-statically scheduling deterministic large grain dataflow (LGDF) algorithms for distributed execution on loosely coupled multicomputer architectures is presented in this research. The computational paradigm used is the ODU/NASA developed Algorithm To Architecture Mapping Model (ATAMM), which consists of marked graphs and Gantt chart representations that model the iterative execution of deterministic LGDF algorithms for different values of throughput and computation time. It is postulated that the behavior of these algorithms could be represented by the aggregate execution of an ensemble of cyclically shifted threads of a specific node sequence. Assuming the existence of one or more such sequences, a cyclo-static scheduling policy for mapping LGDF nodes onto processors for different relative iterations is proposed. A scheduling policy is classified as fully cyclo-static, block cyclo-static or static based on the relationship between nodes, iteration numbers and processors. The scheduling policy forms the basis of a distributed ATAMM Multicomputer Operating System (AMOS), which allows processors to concurrently participate in distributed dataflow and node scheduling operations. A distributed AMOS has been developed and implemented on a multicomputing testbed comprised of local area networked personal computers. Experimental results that confirm the veracity of the scheduling policy are reported. The communication overhead of the message passing mechanism of the testbed is quantitatively analyzed. Benefits claimed of this scheduling approach are, reduction in scheduling overhead, distribution of AMOS operations and the potential for using heterogeneous multicomputer
Tuning the Stability of a Model Quasicrystal and its Approximants with a Periodic Substrate
Creators: name: Varela-Rosales, Nydia Roxana
name: Engel, Michael
Publisher: name: arXiv
Year: 2023
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Quasicrystals and their periodic approximants are complex phases, which have by now been observed in many metallic alloys, soft matter systems, and particle simulations. In recent experiments of thin-film perovskites on solid substrates, the type of complex phase was found to change depending on thermodynamic conditions and the type of substrate used. Here, we investigate the effect of a substrate on the relative stability of a two-dimensional model quasicrystal and its approximants. Our numerical methods are molecular dynamics simulations and free energy calculations that take into account phason flips explicitly. For weak substrates, we observe an incommensurate-commensurate transition, in which a continuous series of QC approximants locks into a discrete number of approximants. For stronger substrates, an enhancement of the stability of the dodecagonal quasicrystal and a variants of square lattices were found. All phenomena can be explained by the interplay of the model system with the substrate. Our results demonstrate that designing novel complex periodic and quasiperiodic structures by choice of suitable substrates is a promising strategy.
description: 10 pages, 6 figures
Validation of turbulence profile forecasting with WRF at the Canary Islands astronomical observatories. Preliminary results
Creators: name: Castro-Almazan, Julio A
name: Perez-Jordan, Gabriel
name: Munoz-Tunon, Casiana
name: Garcia-Lorenzo, Begona
Publisher: name: Proceedings of the COAT-2023 Workshop (Communications and Observations through Atmospheric Turbulence). Durham, UK, 29-31 March 2028
Year: 2023
Subjects: ATMOSPHERIC EFFECTSMETHODS
DATA ANALYSISMETHODS
NUMERICALMETHODS
STATISTICALTECHNIQUES
HIGH ANGULAR RESOLUTIONSITE TESTING

description: Accurate forecasting of the specialized atmospheric parameters directly impacting the astronomical observations is mandatory for efficient optimization of the queue mode operation of modern telescopes. Among them, the vertical profile of turbulence, C2n(h), and the derived integrated coherence parameters (seeing, r0, 0 and 0) are key for the high-resolution techniques, applied both to Astronomy and optical communications. In this work we present the first results that we are obtaining in the validation of the non-hydrostatic numerical weather prediction model WRF (Weather Research and Forecasting) to predict night-time C2n(h) at the Canary Islands Observatories (Teide and Roque de los Muchachos). In this initial stage, the validation is carried out by comparison with local gSCIDAR data. The initial and boundary conditions are obtained from the ERA-Interim reanalysis. Three nested domains have been configured to achieve a final horizontal resolution of 1 km, with around 76 vertical levels ranging in resolution from 50 m in the Boundary Layer to 300 m in the Free Atmosphere. We are using the Vernin-Trinquet model for turbulence retrieval from the standard output parameters of WRF. The final goal is to include this prediction in the current operational forecasting platform ForO (Forecasting the Observatories) at the Canarian observatories.
Individually-addressed quantum gate interactions using dynamical decoupling
Creators: name: Smith, M. C.
name: Leu, A. D.
name: Gely, M. F.
name: Lucas, D. M.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A leading approach to implementing small-scale quantum computers has been to use laser beams, focused to micron spot sizes, to address and entangle trapped ions in a linear crystal. Here we propose a method to implement individually-addressed entangling gate interactions, but driven by microwave fields, with a spatial-resolution of a few microns, corresponding to $10^{-5}$ microwave wavelengths. We experimentally demonstrate the ability to suppress the effect of the state-dependent force using a single ion, and find the required interaction introduces $3.7(4)\times 10^{-4}$ error per emulated gate in a single-qubit benchmarking sequence. We model the scheme for a 17-qubit ion crystal, and find that any pair of ions should be addressable with an average crosstalk error of $\sim 10^{-5}$.
Concepts in Monte Carlo sampling
Creators: name: Tartero, Gabriele
name: Krauth, Werner
Publisher: name: arXiv
Year: 2023
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We discuss modern ideas in Monte Carlo algorithms in the simplified setting of the one-dimensional anharmonic oscillator. After reviewing the connection between molecular dynamics and Monte Carlo, we introduce to the Metropolis and the factorized Metropolis algorithms and to lifted non-reversible Markov chains. We furthermore illustrate the concept of thinning, where moves are accepted by simple bounding potentials rather than, in our case, the harmonic and quartic constituents of the anharmonic oscillator. We point out the multiple connections of our example algorithms with real-world sampling problems. The paper is fully self-contained and Python implementations are provided.
description: 14 pages, 13 figures, 13 algorithms