cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Non-symmetric distorted Brownian motion: strong solutions, strong Feller property and non-explosion results
Creators: name: Röckner, Michael
name: Shin, Jiyong
name: Trutnau, Gerald
Publisher: name: arXiv
Year: 2015
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 31C25, 60J60, 47D07 (Primary), 31C15, 60J35, 60H20 (Secondary)

description: Using elliptic regularity results in weighted spaces, stochastic calculus and the theory of non-symmetric Dirichlet forms, we first show weak existence of non-symmetric distorted Brownian motion for any starting point in some domain $E$ of $\mathbb{R}^d$, where $E$ is explicitly given as the points of strict positivity of the unique continuous version of the density to its invariant measure. Non-symmetric distorted Brownian motion is a singular diffusion, i.e. a diffusion that typically has an unbounded and discontinuous drift. Once having shown weak existence, we obtain from a result of \cite{KR} that the constructed weak solution is indeed strong and weakly as well as pathwise unique up to its explosion time. As a consequence of our approach, we can use the theory of Dirichlet forms to prove further properties of the solutions. More precisely, we obtain new non-explosion criteria for them. We finally present concrete existence and non-explosion results for non-symmetric distorted Brownian motion related to a class of Muckenhoupt weights and corresponding divergence free perturbations.
description: Minor corrections, reference [17] updated
The Tropical Commuting Variety
Creators: name: Morrison, Ralph
name: Tran, Ngoc M.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Algebraic Geometry (math.AG)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: We study tropical commuting matrices from two viewpoints: linear algebra and algebraic geometry. In classical linear algebra, there exist various criteria to test whether two square matrices commute. We ask for similar criteria in the realm of tropical linear algebra, giving conditions for two tropical matrices that are polytropes to commute. From the algebro-geometric perspective, we explicitly compute the tropicalization of the classical variety of commuting matrices in dimension 2 and 3.
description: 14 pages, 4 figures
Spectrally multiplexed heralded single photon source at telecom-band
Creators: name: Yu, Hao
name: Yuan, Chenzhi
name: Zhang, Ruiming
name: Zhang, Zichang
name: Li, Hao
name: Wang, You
name: Deng, Guangwei
name: You, Lixing
name: Song, Haizhi
name: Wang, Zhiming
name: Guo, Guang-Can
name: Zhou, Qiang
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Heralded single photon source (HSPS) is an important way in generating genuine single photon, having advantages of experimental simplicity and versatility. However, HSPS intrinsically suffers from the trade-off between the heralded single photon rate and the single photon purity. To overcome this, one can apply multiplexing technology in different degrees of freedom to enhance the performance of HSPS. Here, by employing spectral multiplexing and active feed-forward spectral manipulating, we demonstrate a HSPS at 1.5 μm telecom-band. Our experimental results show that the spectral multiplexing effectively erases the frequency correlation of pair source and significantly improves the heralded single photon rate while keeping the g{^(^2^)}(0) as low as 0.0006{\pm}0.0001. The Hong-Ou-Mandel interference between the heralded single photons and photons from an independent weak coherent source indicates a high indistinguishability. Our results pave a way for scalable HSPS by spectral multiplexing towards deterministic single photon emission.
description: Main text: 20 pages, 5 figures, 1 table. Supplementary material: 8 pages, 3 figures, 2 tables
Lattice QCD results for the topological up-quark mass contribution: too small to rescue the $m_u=0$ solution to the strong CP problem
Creators: name: Alexandrou, Constantia
name: Finkenrath, Jacob
name: Funcke, Lena
name: Jansen, Karl
name: Kostrzewa, Bartosz
name: Pittler, Ferenc
name: Urbach, Carsten
Publisher: name: Deutsches Elektronen-Synchrotron, DESY, Hamburg
Year: 2022
Subjects: strong interaction: CP
mass: topological
mass: twist
effect: topological
up: coupling
conservation law: CP
symmetry: CP
fermion: mass: twist
coupling: Yukawa
quark
lattice
quantum chromodynamics
lattice field theory
current algebra
charm
nonperturbative
instanton

description: A vanishing Yukawa coupling of the up quark could in principle solve the strong CP problem. To render this solution consistent with current algebra results, the up quark must receive an alternative mass contribution that conserves CP symmetry. Such a contribution could be provided by QCD through non-perturbative topological effects, including instantons. In this talk, we present the first direct lattice computation of this topological mass contribution, using gauge configurations generated by the Extended Twisted Mass collaboration. We use the Iwasaki gauge action, Wilson twisted mass fermions at maximal twist, and dynamical up, down, strange and charm quarks. Our result for the topological mass contribution is an order of magnitude too small to account for the phenomenologically required up-quark mass. This rules out the 'massless' up-quark solution to the strong CP problem, in accordance with previous results relying on $\chi$PT fits to lattice data. The talk is based on [Alexandrou et al., PRL 125, 232001 (2020)], where more details can be found.
Low Background Signal Readout Electronics for the MAJORANA DEMONSTRATOR
Creators: name: Guinn, I.
name: Abgrall, N.
name: Avignone, F. T.
name: Barabash, A. S.
name: Bertrand, F. E.
name: Brudanin, V.
name: Busch, M.
name: Buuck, M.
name: Byram, D.
name: Caldwell, A. S.
name: Chan, Y-D.
name: Christofferson, C. D.
name: Cuesta, C.
name: Detwiler, J. A.
name: Efremenko, Yu.
name: Ejiri, H.
name: Elliott, S. R.
name: Galindo-Uribarri, A.
name: Giovanetti, G. K.
name: Goett, J.
name: Green, M. P.
name: Gruszko, J.
name: Guiseppe, V. E.
name: Henning, R.
name: Hoppe, E. W.
name: Howard, S.
name: Howe, M. A.
name: Jasinski, B. R.
name: Keeter, K. J.
name: Kidd, M. F.
name: Konovalov, S. I.
name: Kouzes, R. T.
name: LaFerriere, B. D.
name: Leon, J.
name: MacMullin, J.
name: Martin, R. D.
name: Meijer, S. J.
name: Mertens, S.
name: Orrell, J. L.
name: O'Shaughnessy, C.
name: Overman, N. R.
name: Poon, A. W. P.
name: Radford, D. C.
name: Rager, J.
name: Rielage, K.
name: Robertson, R. G. H.
name: Romero-Romero, E.
name: Ronquest, M. C.
name: Shanks, B.
name: Shirchenko, M.
name: Snyder, N.
name: Suriano, A. M.
name: Tedeschi, D.
name: Trimble, J. E.
name: Varner, R. L.
name: Vasilyev, S.
name: Vetter, K.
name: Vorren, K.
name: White, B. R.
name: Wilkerson, J. F.
name: Wiseman, C.
name: Xu, W.
name: Yakushev, E.
name: Yu, C-H.
name: Yumatov, V.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The MAJORANA DEMONSTRATOR is a planned 40 kg array of Germanium detectors intended to demonstrate the feasibility of constructing a tonne-scale experiment that will seek neutrinoless double beta decay ($0νββ$) in $^{76}\mathrm{Ge}$. Such an experiment would require backgrounds of less than 1 count/tonne-year in the 4 keV region of interest around the 2039 keV Q-value of the $ββ$ decay. Designing low-noise electronics, which must be placed in close proximity to the detectors, presents a challenge to reaching this background target. This paper will discuss the MAJORANA collaboration's solutions to some of these challenges.
Manifestation of relative phase in dynamics of two interacting Bose-Bose droplets
Creators: name: Pylak, Maciej
name: Gampel, Filip
name: Płodzień, Marcin
name: Gajda, Mariusz
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We study coherent dynamics of two interacting Bose-Bose droplets by means of the extended Gross-Pitaevskii equation. The relative motion of the droplets couples to the phases of their components. The dynamics can be understood in terms of the evolution of zero-energy modes recovering symmetries spontaneously broken by the mean-field solution. These are translational symmetry and two U(1) symmetries, associated with the phases of the droplets' two components. A phase-dependent interaction potential and double Josephson-junction equations are introduced to explain the observed variety of different scenarios of collision. We show that the evolution of the droplets is a macroscopic manifestation of the hidden dynamics of their phases. The occurrence of nondissipative drag between the two supercurrents (Andreev-Bashkin effect) is mentioned.
Sequential Hypothesis Tests for Adaptive Locality Sensitive Hashing
Creators: name: Chakrabarti, Aniket
name: Parthasarathy, Srinivasan
Publisher: name: arXiv
Year: 2014
Subjects: subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: All pairs similarity search is a problem where a set of data objects is given and the task is to find all pairs of objects that have similarity above a certain threshold for a given similarity measure-of-interest. When the number of points or dimensionality is high, standard solutions fail to scale gracefully. Approximate solutions such as Locality Sensitive Hashing (LSH) and its Bayesian variants (BayesLSH and BayesLSHLite) alleviate the problem to some extent and provides substantial speedup over traditional index based approaches. BayesLSH is used for pruning the candidate space and computation of approximate similarity, whereas BayesLSHLite can only prune the candidates, but similarity needs to be computed exactly on the original data. Thus where ever the explicit data representation is available and exact similarity computation is not too expensive, BayesLSHLite can be used to aggressively prune candidates and provide substantial speedup without losing too much on quality. However, the loss in quality is higher in the BayesLSH variant, where explicit data representation is not available, rather only a hash sketch is available and similarity has to be estimated approximately. In this work we revisit the LSH problem from a Frequentist setting and formulate sequential tests for composite hypothesis (similarity greater than or less than threshold) that can be leveraged by such LSH algorithms for adaptively pruning candidates aggressively. We propose a vanilla sequential probability ration test (SPRT) approach based on this idea and two novel variants. We extend these variants to the case where approximate similarity needs to be computed using fixed-width sequential confidence interval generation technique.
Rethinking Eurocentrism in Open Science
Creators: name: Almarzouq, Batool
Publisher: name: Zenodo
Year: 2024

description: At present, open science is often viewed as an initiative originating in the Global North that requires contextualisation for the Global South. It appears unidirectional once more, despite the fact that communities in the Global South have a rich heritage of developing systems for knowledge creation and sharing prior to colonial times. There is also resistance to open science, stemming from historical exploitation of knowledge in these regions during colonial periods. Within the current system, knowledge from the South (somehow) requires validation by Western rankings and Western journals.

The current reward system, deeply rooted in Western norms, disadvantages institutions globally, particularly those in the South - maintaining a cycle dominated by Western publications and capitalist ideologies, which dictate what is deemed as 'valid' scientific knowledge. Such a system not only restricts academic liberty but also hampers the wider societal and educational contributions that universities ought to provide. Addressing Eurocentrism and the need for delinking in rethinking assessments of and incentives for researchers to engage in Open Science is important.

The South would not be able to catch up in such a capitalist context, because of the system’s inherent polarization. Open science should be a critical opportunity to fundamentally rethink, re-envision, and transform the role, foundations, and public good orientation of science itself. This talk will describe how the underlying scientific method itself has evolved but has been overly constrained and shaped by a Western colonial framing for centuries. It will also examine what we mean by decolonisation beyond the admission of non-western texts into reading lists?This talk was presented in OpenFest Online Symposium 2024: Towards an Open Research Culture
CARACTERIZACIÓN DE NOVAS E NOVOS ENTRANTES NO SECTOR AGRARIO DE GALICIA
Creators: name: Fernández Villar, Guillermina
Publisher: name: Laborate USC (Land Lab)
Year: 2024

description: TRABAJO FIN DE MÁSTER PARA LA TITULACIÓN DEL MÁSTER EN INGENIERÍA AGRONÓMICA

En los últimos años la estructura de las explotaciones en Europa experimentó cambios notables: el descenso en el número de explotaciones y aumento en el tamaño medio de las mismas, y el envejecimiento de las personas titulares. Mientras el número de sucesiones e incorporaciones tradicionales desciende, aumenta el número de personas sin experiencia previa que comienzan a buscar su hueco. Estas son las referidas como nuevos y nuevas entrantes (NE) en la agricultura, personas que no tienen vínculos familiares ni experiencia previa en el sector y que se incorporan aportando, en muchas ocasiones, destrezas y experiencia en diversos ámbitos, junto con otras características muy particulares.Para conocer el estado actual y características de este perfil en Galicia, se realizó una revisión exhaustiva de la literatura académica, tratando de adoptar también una definición de qué es una persona nueva entrante. Posteriormente, mediante el diseño de un cuestionario basado en las características de las y de los NE en Europa, se recopilaron los datos de una muestra de las personas incorporadas en Galicia en los últimos diez años y se analizaron cuantitativa y cualitativamente.Una vez obtenidos los resultados, se interpretaron y se identificaron posibles patrones que, si bien se acercan al perfil de NE europeo, muestran también características particulares. Los resultados muestran una alta heterogeneidad en cuanto a base territorial, origen laboral o rentabilidad, así como una apuesta clara por la producción agroecológica. Este estudio abre las puertas a nuevas investigaciones asimismo que pongan un mayor esfuerzo en la caracterización cualitativa y las externalidades que moldean a dichas personas en el sector agrario.
Coassembly and the $K$-theory of finite groups
Creators: name: Malkiewich, Cary
Publisher: name: arXiv
Year: 2015
Subjects: subject: Algebraic Topology (math.AT)
subject: K-Theory and Homology (math.KT)
subject: FOS: Mathematics
subject: 18F25, 19D10, 55R12, 55R70

description: We study the $K$-theory and Swan theory of the group ring $R[G]$, when $G$ is a finite group and $R$ is any ring or ring spectrum. In this setting, the well-known assembly map for $K(R[G])$ has a companion called the coassembly map. We prove that their composite is the equivariant norm of $K(R)$. This gives a splitting of both assembly and coassembly after $K(n)$-localization, a new map between Whitehead torsion and Tate cohomology, and a partial computation of $K$-theory of representations in the category of spectra.
description: Accepted version. 44 pages
title: Das Potential der Blockchain-Technologie auf Rückverfolgbarkeitsprozesse von Lebensmitteln
Creators: name: Liebeg, Richard
Publisher: name: FH CAMPUS 02 (CAMPUS 02 Fachhochschule der Wirtschaft)
Year: 2023
Subjects: subject: 658 Allgemeines Management

description: Die Blockchain-Technologie hat in den vergangenen Jahren viele datenbankbasierte Anwendungen mittels Steigerung von Transparenz, Vertrauen und Sicherheit innoviert. Von diesen Faktoren kann auch die Lebensmittelindustrie profitieren. Die vorliegende Masterarbeit hat daher das Ziel, mögliche Potenziale der Nutzung der Blockchain-Technologie für die Rückverfolgung von Lebensmitteln zu untersuchen. Dafür wurden aus der Literatur zum einen die Bedürfnisse der Lebensmittelindustrie und zum anderen die inhärenten Merkmale und Möglichkeiten der Blockchain-Technologie erarbeitet und in Kontext gesetzt. Zudem wurden drei lebensmittelspezifische Anwendungsfälle in verschiedenen Entwicklungsstadien ermittelt und analysiert. Aus den gewonnenen theoretischen Erkenntnissen konnten vier Einsatzpotenziale festgestellt werden. Daraus wurden Einsatzmodelle ausgearbeitet, welche in weiterer Folge von 10 Experten auf ihre zeitnahe Realisierbarkeit und Relevanz für die Lebensmittelbranche bewertet und weiterentwickelt werden konnten. Das Ergebnis der praktischen Arbeit im Rahmen dieser Masterarbeit ist die Erstellung eines Modells zur Rückverfolgbarkeit von Bio-Gütesiegeln auf Basis der Blockchain-Technologie, welches sowohl zeitnahe umsetzbar ist als auch ein hohes Potenzial für den aktuellen Markt hat.
description: Blockchain technology has innovated many database-based applications in recent years by increasing transparency, trust and security, Also the food industry can potentially benefit out of these factors. The aim of the present master's thesis is therefore to investigate possible potentials of the use of blockchain technology for tracing food. On the one hand, the needs of the food industry and, on the other, the inherent characteristics and possibilities of blockchain technology were elaborated and put into context. In addition, three food-specific blockchain use cases at different stages of development were identified and analyzed. Based on the theoretical gained knowledge, four potential applications could be identified. These four models have been further evaluated and optimized by 10 experts. A focus was put on the possibility of a timely implementation and possible markets. The result of the practical part of this master thesis is the creation of a model for the traceability of organic food labels based on blockchain technology, which is timely feasible and has a high potential for the current market.
3+1D $\theta$-Term on the Lattice from the Hamiltonian Perspective
Creators: name: Kan, Angus
name: Funcke, Lena
name: Kühn, Stefan
name: Dellantonio, Luca
name: Zhang, Jinglei
name: Haase, Jan F.
name: Muschik, Christine A.
name: Jansen, Karl
Publisher: name: Deutsches Elektronen-Synchrotron, DESY, Hamburg
Year: 2022
Subjects: Monte Carlo: Markov chain
energy: ground state
charge: density
charge: topological
energy: density
lattice field theory
abelian
critical phenomena
network
Hamiltonian
Hamiltonian formalism
lattice
nonabelian
gap
U(1)
crossing
numerical calculations
strong coupling

description: Quantum and tensor network simulations have emerged as prominent sign-problem free approaches to lattice gauge theories. Unlike conventional Markov chain Monte Carlo methods, they are based on the Hamiltonian formulation. In this talk, we fill a gap in the literature and present the first derivation of the Hamiltonian 3+1D $\theta$-term-which is an important sign-problem afflicted term---for Abelian and non-Abelian lattice gauge theories. Furthermore, we perform exact diagonalization for a 3+1D U(1) lattice gauge theory including the $\theta$-term on a unit periodic cube. Our numerical results reveal a novel phase transition at fixed values of $\theta$ in the strong-coupling regime. The transition is evidenced by an avoided level crossing in the ground state energy, as well as sudden changes in the plaquette expectation value, the electric energy density, and the topological charge density. Extensions of our work to larger lattices can be readily performed using state-of-the-art tensor network simulations. Moreover, our work provides a concrete starting point for an eventual quantum simulation of the $\theta$-dependent phase structure and dynamics of lattice gauge theories in 3+1D. This talk is mainly based on [1]. We expand beyond [1] by including a derivation of the (non-)Abelian fixed-length Higgs term in the Hamiltonian formulation for future studies of (non-)Abelian-Higgs models with a $\theta$-term.
The ultra-hot-Jupiter KELT-16 b: Dynamical Evolution and Atmospheric Properties
Creators: name: Mancini, L.
name: Southworth, J.
name: Naponiello, L.
name: Basturk, O.
name: Barbato, D.
name: Biagiotti, F.
name: Bruni, I.
name: Cabona, L.
name: D'Ago, G.
name: Damasso, M.
name: Erdem, A.
name: Evans, D.
name: Henning, Th.
name: Ozturk, O.
name: Ricci, D.
name: Sozzetti, A.
name: Tregloan-Reed, J.
name: Yalcinkayaz, S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We present broad-band photometry of 30 planetary transits of the ultra-hot Jupiter KELT-16b, using five medium-class telescopes. The transits were monitored through standard B, V, R, I filters and four were simultaneously observed from different places, for a total of 36 new light curves. We used these new photometric data and those from the TESS space telescope to review the main physical properties of the KELT-16 planetary system. Our results agree with previous measurements but are more precise. We estimated the mid-transit times for each of these transits and combined them with others from the literature to obtain 69 epochs, with a time baseline extending over more than four years, and searched for transit time variations. We found no evidence for a period change, suggesting a lower limit for orbital decay at 8 Myr, with a lower limit on the reduced tidal quality factor of $Q^{\prime}_{\star}>(1.9 \pm 0.8) \times 10^5$ with $95\%$ confidence. We built up an observational, low-resolution transmission spectrum of the planet, finding evidence of the presence of optical absorbers, although with a low significance. Using TESS data, we reconstructed the phase curve finding that KELT-16b has a phase offset of $25.25 \pm 14.03$ $^{\circ}$E, a day- and night-side brightness temperature of $3190 \pm 61$ K and $2668 \pm 56$ K, respectively. Finally, we compared the flux ratio of the planet over its star at the TESS and Spitzer wavelengths with theoretical emission spectra, finding evidence of a temperature inversion in the planet's atmosphere, the chemical composition of which is preferably oxygen-rich rather than carbon-rich.
description: 17 pages, 16 figures, Accepted for publication in Monthly Notices of the Royal Astronomical Society
GILOS (CERASUS AVIUM L.) MEVALARINING SAQLASHDA MEVA SIFATIGA TA'SIR ETUVCHI OMILLAR
Creators: name: Jo'rayev, U.CH.
Publisher: name: Zenodo
Year: 2023

description: Meva va sabzavotlar odamlarning boyligi va sog'lig'i uchun zarur bo'lib, qishloq xo'jaligi ishlab chiqarish vositalari, konservalangan qadoqlash va logistika texnologiyasining uzluksiz rivojlanishi bilan butun dunyo bo'ylab meva va sabzavotlarni iste'mol qilish ortib bormoqda.
Thermodynamics of $T \bar{T}$ perturbations of some single particle field theories
Creators: name: LeClair, André
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We study the Thermodynamic Bethe Ansatz (TBA) equations for pure $T\bar{T}$ perturbations of some simple integrable quantum field theories with a single bosonic or fermionic particle, in particular the massive sinh-Gordon model and its ultraviolet (UV) limit which is a deformation of the conformally invariant free massless boson. Whereas the TBA equations for $T\bar{T}$ deformations of massive theories are in principle known, the TBA equations we propose for the deformations of conformal field theories (CFT's) are relatively new and require a special factorization in rapidity variables of the CDD factor for the scattering of the massless particles. The latter TBA equations can be solved exactly and reproduce the known results for the ground state energy on a cylinder of circumference $R$ which were previously obtained using different methods based for instance on the Burgers differential equation. Special attention is paid to the c-theorem in this context which is discussed in some detail. For positive infra-red (IR) central charge $c_{IR}$, for flows consistent with the c-theorem the ground state energy develops a (previously known) square-root singularity towards the UV, which strongly suggests the theories are UV incomplete in these physically important cases. We suggest that the singularity indicates a tachyonic vacuum instability. Other cases with $c_{IR} < 0$ do not have this singularity and are interpreted as being UV complete with $c_{UV} = 0$. We extend our results to a continuously variable $c_{IR}$ by introducing a chemical potential and suggest this as a possible toy model for the $T\bar{T}$ perturbed Liouville theory.
description: 17 pages, version 2: Includes some short remarks suggesting the singularity indicates a tachyonic vacuum instability. References added; version 3: More pedagogical; care is taken to match conventions of previous work;, references added; no change in previous results nor additional results. Version 4: published version in J. Phys. A. Mathematical and Theoretical
Transverse single-spin asymmetries in proton-proton collisions at the AFTER@LHC experiment in a TMD factorisation scheme
Creators: name: Anselmino, M.
name: D'Alesio, U.
name: Melis, S.
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The inclusive large-$p_T$ production of a single pion, jet or direct photon, and Drell-Yan processes, are considered for proton-proton collisions in the kinematical range expected for the fixed-target experiment AFTER, proposed at LHC. For all these processes, predictions are given for the transverse single-spin asymmetry, $A_N$, computed according to a Generalised Parton Model previously discussed in the literature and based on TMD factorisation. Comparisons with the results of a collinear twist-3 approach, recently presented, are made and discussed.
description: RevTex4, 12 pages, 36 eps figures. V2: Few paragraphs and comments added. Several references added. Results unchanged. Matches the published version
title: Entwicklung eines Geschäftsmodells für ein handgeführtes 3D-Oberflächenmesssystem
Creators: name: Gaugeler, Jakob
Publisher: name: FH CAMPUS 02 (CAMPUS 02 Fachhochschule der Wirtschaft)
Year: 2023
Subjects: subject: 658 Allgemeines Management

description: Die Arbeit beschäftigt sich mit einem freihandgeführten 3D-Laser-Scanner und dessen potentiellen Anwendungsfeldern, sowie möglichen Geschäftsmodellvarianten für den Laserscanner. Der handgeführte 3D-Laserscanner wurde vom Unternehmen Weitzer Parkett in Kooperation mit Joanneum Research entwickelt. Im Theorieteil der Arbeit werden die technischen Möglichkeiten des Scanners analysiert und mit anderen Messsystemen am Markt verglichen. Parallel beschäftigt sich die Arbeit mit der dem Unternehmen Weitzer Parkett und dessen Bedürfnissen und Möglichkeiten. Des Weiteren werden potenzielle Anwendungsfelder für den Scanner identifiziert. Daraus wird ein Vorgehensmodell abgeleitet, welches zum Erstellen der von drei generischen Geschäftsmodellvarianten genutzt wird. Diese Geschäftsmodellvarianten basieren auf bestehenden Geschäftsmodellvarianten sowie auf den Ergebnissen der Theorie. Im anschließenden Praxisteil werden die Ergebnisse aus der Theorie, sowie die erhaltenen generischen Geschäftsmodellvarianten mit Hilfe von Experteninterviews verifiziert oder gegebenenfalls abgeändert. Nach dem Vergleich der zahlreichen Optionen und Potenziale des 3D-Laser-Scannerers wird eine für das Unternehmen Weitzer Parkett geeignete Geschäftsmodellvarianter ausgefühlt und für das Unternehmen ausformuliert. Am Ende der Arbeit befindet sich, neben dem Resümee, eine Handlungsempfehlung für das Unternehmen.
description: The following Paper focusses on a freehand guided 3D laser scanner. It deals with the potential fields of application for the scanner, as well as possible business models. The handheld 3D laser scanner was developed by Weitzer Parkett in cooperation with Joanneum Research. In the theoretical part of the work the technical possibilities of the scanner are analysed and compared with other measuring systems on the market, the needs and possibilities of Weitzer Parkett are shown and potential fields of application for the scanner are identified. From this result a process model is derived, which is used to create three generic business model vagrants. These business model variants are based on existing business model patterns. In the practical part, the results from the theory, as well as the received generic business models are verified and adapted with the help of expert interviews. After comparing the options and potentials for the 3D laser scanner, a business model variant that is suitable for Weitzer Parkett is selected and formulated for the company. At the end of the work the best fitting business model variant is chosen and described in detail and used as a recommendation for action for Weitzer Parkett.
A Suzaku view of IGR J16393-4643
Creators: name: Islam, Nazma
name: Maitra, Chandreyee
name: Pradhan, Pragati
name: Paul, Biswajit
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The pulsar IGR J16393-4643 belongs to a class of highly absorbed supergiant HMXBs, characterised by very high column density of absorbing matter. We present the results of the simultaneous broad-band pulsation and spectrum analysis, from a 44 kilosec Suzaku observation of the source. The orbital intensity profile created with the SWIFT-BAT light-curve shows an indication of IGR J16393-4643 being an eclipsing system with a short eclipse semi-angle $θ_{E} \sim$ 17$^{\circ}$. For a supergiant companion star with a 20 R$_{\odot}$ radius, this implies an inclination of the orbital plane in the range of 39$^{\circ}$-57$^{\circ}$, whereas for a main sequence B star as the companion with a 10 R$_{\odot}$ radius, the inclination of the orbital plane is in the range of 60$^{\circ}$-77$^{\circ}$. Pulse profiles created for different energy bands, have complex morphology which shows some energy dependence and increases in pulse fraction with energy. We have also investigated broad-band spectral characteristics, for phase averaged and resolving the pulse phase into peak phase and trough phase. The phase averaged spectrum has a very high N$_{H} (\sim 3 \times 10^{23}$ cm$^{-2}$) and is described by power-law ($Γ\sim$ 0.9) with a high energy cut-off above 20 keV. We find a change in the spectral index in the peak phase and trough phase, implying an underlying change in the source spectrum.
description: 8 pages, 7 figures. Accepted for publication in MNRAS
Designing region-specific transition practices. Responsible Research and Innovation approach for transitioning the traditional industry regions into digitalised industry territories.
Creators: name: Boly, Vincent
name: Marche, Brunelle
name: Morel, Laure
name: Camargo, Mauricio
name: Monticolo, Davy
Publisher: name: Zenodo
Year: 2021
Subjects: innovation systems & digitalization
innovation dynamics & modelling
RRI
digiterri
H2020
stakeholder engagement
digitalization

description: DigiTeRRI includes a phase of territorial diagnosis and in particular a qualitative analysis of the initiatives taken by regional ecosystems in favour of digitization. WP 2.4 has identified voluntary and entrepreneurial practices carried out in Värmland, Styria and Grand Est, whose RRI dimension was then studied.
title: Exploring the role of Environmental Impact Assessment (EIA) system in delivering environmental sustainability within the textile industry of Bangladesh
Creators: name: Hossain, Dipita
Publisher: name: University of Liverpool Repository
Year: 2023

description: The textile industry is one of the fastest growing industries around the globe. It occupies a prominent position in the economy of Bangladesh through its significant share of workforce and establishments within the manufacturing sector of the country. Although, for a developing country like Bangladesh, such rapid industrial growth often comes at the price of environmental degradation. A comprehensive research on role of EIA in addressing the environmental sustainability for this key industry in Bangladesh is long due . This study aims in doing so by evaluating the system requirements of EIA for textile industry and its practice at pre and post decision stage. The author has performed extensive literature review on the subject matter for developing the framework of analysis for this research, document analysis on EISs from textile units of the country, face to face interview with the stakeholders and visited case study textile units to understand their post decision performance. The evaluation identified deficiencies within the EIA system requirements for textile industry in Bangladesh. The practice appeared even poorer. Therefore, the major recommendations by author include reforming existing legislation; strengthening administrative arrangements; incorporating sectoral considerations within key components of the EIA system (e.g., guideline on EIA methodology, contents of EIS, EIS review, implementation monitoring); promoting transparency, accountability and quality control by establishing legal status of the stages of EIA and public involvement, measurers promised in EIS and provision of accreditation for EIA consultants, This research can simultaneously contribute to academia, policy making and EIA practice. First, the framework of analysis can be adopted for other comprehensive sectoral EIA studies. Then, the EIS review package can be readily used by Department of Environment (DoE), Bangladesh to review EIA reports from textile industry. Information in this research can also prove helpful to the policy makers while enhancing and reforming the institutional requirements for the EIA system focussing on key sectors like textile. The researcher also understands that there is a scope to extend such study to the informal textile units of this country. However, limited data on that segment of textile industry in Bangladesh might make such research challenging.
Raman microscopy as a defect microprobe for hydrogen bonding characterization in materials used in fusion applications
Creators: name: Pardanaud, Cédric
name: Addab, Younès
name: Martin, Céline
name: Roubin, Pascale
name: Pegourié, Bernard
name: Oberkofler, Martin
name: Köppen, Martin
name: Dittmar, Timo
name: Linsmeier, Christian
Publisher: name: arXiv
Year: 2014
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We present the Raman microscopy ability to detect and characterize the way hydrogen is bonded with elements that will be used for ITER's plasma facing components. For this purpose we first use hydrogenated amorphous carbon samples, formed subsequently to plasma-wall interactions (hydrogen implantation, erosion, deposition...) occurring inside tokamaks, to demonstrate how this technique can be used to retrieve useful information. We pay attention in identifying which spectroscopic parameters are sensitive to the local structure (sp 3 /sp 2) and which gives information on the hydrogen content using isothermal and linear temperature ramp studies on reference samples produced by plasma enhanced chemical vapor deposition. We then focus on the possibility to use this fast, non-destructive and non-contact technique to characterize the influence of hydrogen isotope implantation in few nanometers of graphite and beryllium as C is still used in the JT-60 tokamak and Be is used in JET and will be used as plasma-facing component in the future reactor ITER. We also pay attention on implantation in tungsten oxide which may be formed accidently in the machine.
description: Physica Status Solidi C, 2014
Einfluss von Solar-Alpweiden auf physisch-hydrologische Prozesse
Creators: name: Nowak, Niklas
Publisher: name: Zenodo
Year: 2025
Subjects: subject: solar power
subject: Switzerland
subject: Hydrology
subject: hydrological processes
subject: Alpine solar power

description: Bsc thesis in Geography, 10 ECTS, supervised by Bettina Schaefli;

Abstract: In dieser Literaturstudie wird der Einfluss von Solaralpweiden auf physisch hydrologische Prozesse untersucht. Dabei handelt es sich um Erosionsraten und potenzielle Änderungen der gebirgshydrologischen Prozessen in den betroffenen Gebieten. Die Ziele dieser Arbeit sind es, herauszufinden, welche Anlagetypen in den Schweizer Alpen vorstellbar sind, welche Gebiete auf der Welt vergleichbare Bedingungen haben und worauf sich die Forschung in Zukunft richten sollte. Die Resultate dieser Arbeit wurden mittels einer Literaturrecherche generiert. Über ‘Citation Pearl growing’ sowie ‘Building Blocks’ wurden Artikel im Fachbereich gesucht. 

Die Untersuchung zeigt, dass Solaralpweiden die Zeit von einem Niederschlagsereignis zum Abflusspeak verkürzen. Damit einhergehend sind schnellere Abflussgeschwindigkeiten, die den Boden über erhöhte fluviatile Erosion abtragen können. Zusätzlich erhöhen Solarpaneele die kinetische Energie des aufprallenden Niederschlags, da die Wassermengen konzentriert ablaufen. Dies verstärkt die mechanische Auflockerung des Oberbodens und begünstigt eine intensivere Bodenerosion unterhalb der Paneele. Das trägt dazu bei, dass der Boden unterhalb der Paneele stärker bearbeitet wird. Neben der Betriebsphasen der Anlagen wird auch der Einfluss des Baus der Anlagen berücksichtigt. Die destabilisierenden Bodenbearbeitungsverfahren während der Konstruktionsphase zerstören auch die Vegetationsschicht, welche als natürlicher Erosionsschutz dient. Da die alpine Lage neben den für die Produktion von Solarstrom vorteilhaften Bedingungen harsche Wetterverhältnisse mit sich bringt, ist dieser Eingriff in den Naturraum nicht zu vernachlässigen. Durch langsame Regenerationszeiten der alpinen Vegetation werden somit weitere Erosionsfördernde Bedingungen geschaffen. 

Die Ergebnisse dieser Arbeit bedeuten für die Schweiz, dass zusätzlich zu Machbarkeitsstudien für alpine Solaranlagen auch Pläne und Richtlinien während des Baus und der Inbetriebnahme formuliert werden sollten. Damit kann die schon durch den Klimawandel gefährdete Bergwelt der Schweiz besser geschützt werden und die Stromproduktion wird nachhaltiger und resilienter.
Independence equivalence classes of paths
Creators: name: Ng, Boon Leong
Publisher: name: arXiv
Year: 2021
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: The independence equivalence class of a graph $G$ is the set of graphs that have the same independence polynomial as $G$. A graph whose independence equivalence class contains only itself, up to isomorphism, is independence unique. Beaton, Brown and Cameron (2019) showed that paths with an odd number of vertices are independence unique and raised the problem of finding the independence equivalence class of paths with an even number of vertices. The problem is completely solved in this paper.
Near-Optimal Design of Safe Output Feedback Controllers from Noisy Data
Creators: name: Furieri, Luca
name: Guo, Baiwei
name: Martin, Andrea
name: Ferrari-Trecate, Giancarlo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: As we transition towards the deployment of data-driven controllers for black-box cyberphysical systems, complying with hard safety constraints becomes a primary concern. Two key aspects should be addressed when input-output data are corrupted by noise: how much uncertainty can one tolerate without compromising safety, and to what extent is the control performance affected? By focusing on finite-horizon constrained linear-quadratic problems, we provide an answer to these questions in terms of the model mismatch incurred during a preliminary identification phase. We propose a control design procedure based on a quasiconvex relaxation of the original robust problem and we prove that, if the uncertainty is sufficiently small, the synthesized controller is safe and near-optimal, in the sense that the suboptimality gap increases linearly with the model mismatch level. Since the proposed method is independent of the specific identification procedure, our analysis holds in combination with state-of-the-art behavioral estimators beyond standard least-squares. The main theoretical results are validated by numerical experiments.
description: Baiwei Guo and Andrea Martin contributed equally to this work. in IEEE Transactions on Automatic Control, 2022
Rational Solitons in the Parity-Time-Symmetric Nonlocal Nonlinear Schrödinger Model
Creators: name: Li, Min
name: Xu, Tao
name: Meng, Dexin
Publisher: name: arXiv
Year: 2015
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: In this paper, via the generalized Darboux transformation, rational soliton solutions are derived for the parity-time-symmetric nonlocal nonlinear Schrödinger (NLS) model with the defocusing-type nonlinearity. We find that the first-order solution can exhibit the elastic interactions of rational antidark-antidark, dark-antidark, and antidark-dark soliton pairs on a continuous wave background, but there is no phase shift for the interacting solitons. Also, we discuss the degenerate case in which only one rational dark or antidark soliton survives. Moreover, we reveal that the second-order rational solution displays the interactions between two solitons with combined-peak-valley structures in the near-field regions, but each interacting soliton vanishes or evolves into a rational dark or antidark soliton as $|z|\ra \infty$. In addition, we numerically examine the stability of the first- and second-order rational soliton solutions.
description: 18 pages, 9 figures, 1 table
Open Access: do we need a "transition" or new models?
Creators: name: Giglia, Elena
Publisher: name: Zenodo
Year: 2024
Subjects: Open Access
Diamond Open Access

description: Presentation at GARR conference 2024, May 31 2024

Session Why open science for digital autonomy

72 years to transition to Open Access at the current pace with transformative agreements (JISC 2024). 12.900 dollars to publish 1 article Open Access in Nature. Is it the right path? Following the EU Council conclusions (2022), coupled with the COARA initiative to reform research assessment, we shall explore more effective alternative solutions to disseminate knowledge, such as Diamond journals, overlay journals and the practice of preprints+open peer review.
Frame of Analysis. Responsible Research and Innovation approach for transitioning the traditional industry regions into digitalised industry territories.
Creators: name: Stegmann McCallion, Malin
name: McCallion, Eamonn
Publisher: name: Zenodo
Year: 2021
Subjects: innovation systems & digitalization
digiterri
H2020
RRI
digitalization

description: The report outlines the frame of the data required for the mapping. The common procedure and guidelines to be followed to implement a comprehensive mapping exercise of R&I ecosystems and RRI inclusion in regional development policies.
Efficient Network Structures with Separable Heterogeneous Connection Costs
Creators: name: Heydari, Babak
name: Mosleh, Mohsen
name: Dalili, Kia
Publisher: name: arXiv
Year: 2015
Subjects: subject: General Economics (econ.GN)
subject: Social and Information Networks (cs.SI)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Economics and business
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: We introduce a heterogeneous connection model for network formation to capture the effect of cost heterogeneity on the structure of efficient networks. In the proposed model, connection costs are assumed to be separable, which means the total connection cost for each agent is uniquely proportional to its degree. For these sets of networks, we provide the analytical solution for the efficient network and discuss stability impli- cations. We show that the efficient network exhibits a core-periphery structure, and for a given density, we find a lower bound for clustering coefficient of the efficient network.
description: 9 pages
A FFT-accelerated multi-block finite-difference solver for massively parallel simulations of incompressible flows
Creators: name: Costa, Pedro
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We present a multi-block finite-difference solver for massively parallel Direct Numerical Simulations (DNS) of incompressible flows. The algorithm combines the versatility of a multi-block solver with the method of eigenfunctions expansions, to speedup the solution of the pressure Poisson equation. This is achieved by employing FFT-based transforms along one homogeneous direction, which effectively reduce the problem complexity at a low cost. These FFT-based expansions are implemented in a framework that unifies all valid combinations of boundary conditions for this type of method. Subsequently, a geometric multigrid solver is employed to solve the reduced Poisson equation in a multi-block geometry. Particular care was taken here, to guarantee the parallel performance of the multigrid solver when solving the reduced linear systems equations. We have validated the overall numerical algorithm and assessed its performance in a massively parallel setting. The results show that 2- to 8-fold reductions in computational cost may be easily achieved when exploiting FFT acceleration for the solution of the Poisson equation. The solver, SNaC, has been made freely available and open-source under the terms of an MIT license.
Low temperature dielectric relaxation study of aqueous solutions of diethylsulfoxide
Creators: name: Gabrielyan, L.
name: Markarian, S.
name: Lunkenheimer, P.
name: Loidl, A.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: In the present work, dielectric spectra of mixtures of diethylsulfoxide (DESO) and water are presented, covering a concentration range of 0.2 - 0.3 molar fraction of DESO. The measurements were performed at frequencies between 1 Hz and 10 MHz and for temperatures between 150 and 300 K. It is shown that DESO/water mixtures have strong glass-forming abilities. The permittivity spectra in these mixtures reveal a single relaxation process. It can be described by the Havriliak-Negami relaxation function and its relaxation times follow the Vogel-Fulcher-Tammann law, thus showing the typical signatures of glassy dynamics. The concentration dependence of the relaxation parameters, like fragility, broadening, and glass temperature, are discussed in detail.
description: 20 pages, 5 figures