cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Entanglement between a telecom photon and an on-demand multimode solid-state quantum memory
Creators: name: Rakonjac, Jelena V.
name: Lago-Rivera, Dario
name: Seri, Alessandro
name: Mazzera, Margherita
name: Grandi, Samuele
name: de Riedmatten, Hugues
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Entanglement between photons at telecommunication wavelengths and long-lived quantum memories is one of the fundamental requirements of long-distance quantum communication. Quantum memories featuring on-demand read-out and multimode operation are additional precious assets that will benefit the communication rate. In this work we report the first demonstration of entanglement between a telecom photon and a collective spin excitation in a multimode solid-state quantum memory. Photon pairs are generated through widely non-degenerate parametric down-conversion, featuring energy-time entanglement between the telecom-wavelength idler and a visible signal photon. The latter is stored in a Pr$^{3+}$:Y$_2$SiO$_5$ crystal as a spin wave using the full Atomic Frequency Comb scheme. We then recall the stored signal photon and analyze the entanglement using the Franson scheme. We measure conditional fidelities of $92(2)\%$ for excited-state storage, enough to violate a CHSH inequality, and $77(2)\%$ for spin-wave storage. Taking advantage of the on-demand read-out from the spin state, we extend the entanglement storage in the quantum memory for up to 47.7~$μ$s, which could allow for the distribution of entanglement between quantum nodes separated by distances of up to 10 km.
title: Das Gesundheitswesen im Wandel
title: Entwicklung einer Digitalisierungsstrategie am Beispiel einer Grazer Privatklinik
titleType: Subtitle
Creators: name: Freydl, Christina
Publisher: name: FH CAMPUS 02 (CAMPUS 02 Fachhochschule der Wirtschaft)
Year: 2023
Subjects: subject: 658 Allgemeines Management

description: Das Gesundheitswesen befindet sich im Wandel der Zeit – im Wandel der Digitalisierung. Immer mehr Gesundheitsbetriebe und vor allem Krankenanstalten versuchen von analogen auf digitale Arbeitsabläufe umzusteigen. Um das Ziel der Arbeit zu erfüllen und eine Digitalisierungsstrategie für das Hansa Privatklinikum zu entwickeln, ist es notwendig, bestehende Digitalisierungspotenziale am Markt zu analysieren. Diese Analyse soll vor allem im ausgearbeiteten Vorgehensmodell dabei helfen, Ideen des Personals mit den bestehenden Potenzialen zu vergleichen und eine Liste an Digitalisierungspotenzial zu erschaffen. Die grundlegende Intention ist es, die optimale Digitalisierungsstrategie zu finden, die den Klinikumsbetrieb in Zukunft weitervorantreiben und effizienter gestalten soll. Der Weg zur Digitalisierungsstrategie durchläuft während dieser Arbeit mehrere Phasen. Zu Beginn wird das Gesundheitswesen selbst genauer betrachtet, bevor sich mit den Begriffen Strategie und Digitalisierung, sowie bestehenden Strategiemodellen auseinandergesetzt wird. Durch Vergleiche von bestehenden Modellen und Methoden zur Erarbeitung dieser Strategie, kann schlussendlich ein idealtypisches Vorgehensmodell – bestehend aus vier Phasen – zur Entwicklung einer Digitalisierungsstrategie aufgezeigt werden. Dieses Modell wird anschließend anhand eines Fallbeispiels getestet und adaptiert.
description: The healthcare sector is changing over time - over the course of digitalization. More and more healthcare companies and especially hospitals are trying to switch from analogue to digital workflows. In order to fulfill the goal of the work and to develop a digitalization strategy for the Hansa Privatklinikum, it is necessary to analyze existing digitalization potentials on the market. This analysis should help to compare the ideas of the employees with the existing potentials and to create a list of digitalization potentials, especially in the developed procedure model. The fundamental intention is to find the optimal digitalization strategy that will further advance the operation of the hospital in the future and make it more efficient. The path to the digitalization strategy passes through several stages during this work. At the beginning, the health care system itself will be examined in more detail before the terms strategy and digitization as well as existing strategy models will be discussed. By comparing existing models and methods for the development of a strategy, an ideal typical procedure model, consisting of four phases, for the development of a digitalization strategy can finally be shown. This model will then be tested and adapted on the basis of a case study.
Higher twist effects in $e^+e^-$ annihilation at high energies
Creators: name: Wei, Shu-yi
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In the two papers published recently, we apply collinear expansion to both inclusive ($e^+ e^- \to h+X$) and semi-inclusive ($e^+ e^- \to h + \bar q + X$) hadron production in $e^+ e^-$ annihilation to derive a formalism suitable for a systematic study of leading as well as higher twist contributions to fragmentation functions at the tree level. We carry out the calculations for hadrons with spin-0, spin-1/2 as well as spin-1. This proceeding is mainly a summary of these two papers.
description: 6 pages, contribution to the proceedings of the 21st International Symposium on Spin Physics (Spin2014), Beijing, China, October 20-24, 2014
Thermodynamics of Error Correction
Creators: name: Sartori, Pablo
name: Pigolotti, Simone
Publisher: name: arXiv
Year: 2015
Subjects: subject: Subcellular Processes (q-bio.SC)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: Information processing at the molecular scale is limited by thermal fluctuations. This can cause undesired consequences in copying information since thermal noise can lead to errors that can compromise the functionality of the copy. For example, a high error rate during DNA duplication can lead to cell death. Given the importance of accurate copying at the molecular scale, it is fundamental to understand its thermodynamic features. In this paper, we derive a universal expression for the copy error as a function of entropy production and {\cred work dissipated by the system during wrong incorporations}. Its derivation is based on the second law of thermodynamics, hence its validity is independent of the details of the molecular machinery, be it any polymerase or artificial copying device. Using this expression, we find that information can be copied in three different regimes. In two of them, work is dissipated to either increase or decrease the error. In the third regime, the protocol extracts work while correcting errors, reminiscent of a Maxwell demon. As a case study, we apply our framework to study a copy protocol assisted by kinetic proofreading, and show that it can operate in any of these three regimes. We finally show that, for any effective proofreading scheme, error reduction is limited by the chemical driving of the proofreading reaction.
description: 9 pages, 5 figures
Framework for RRI implementation in R&I ecosystems of the three territories. Responsible Research and Innovation approach for transitioning the traditional industry regions into digitalised industry territories.
Creators: name: Nguyen, Nhien
name: Jensen, Are
name: Hansen, Jens Ørding
Publisher: name: Zenodo
Year: 2021
Subjects: RRI
digiterri
digitalization
H2020
knowledge transfer
stakeholder engagement
innovation system & digitalization

description: The deliverable presents a general framework for how to incorporate RRI into the digitalization process of traditional industry territories. The framework is intended for territories that have adopted a smart specialization strategy (S3). The framework highlights RRI-related challenges and opportunities arising from digitalization.
description: with contributions from Section 2.2.1: Malin Stegmann McCallion (KAU). Section 2.2.3: Jean Jacques Bernardini (GEN). Section 2.3: Introduction. Marianne Hörlesberger (AIT). Section 3.1: Marianne Hörlesberger, Andrea Kasztler (AIT).
title: Development of a Proceeding Model for creating a Platform Business Model
Creators: name: Duroudier, Jon
Publisher: name: FH CAMPUS 02 (CAMPUS 02 Fachhochschule der Wirtschaft)
Year: 2023
Subjects: subject: 658 Allgemeines Management

description: The machining industry is one of the oldest and most traditional industry from the last two centuries. Its development at the early beginning supported the well-known “industrial revolution” period, and over the years, new technical developments has brought the machining technology to a very high level of precision, accuracy and competitiveness in terms of cost and quality. Nowadays the world is facing a new revolution related to the internet of things, big data, and the virtual world; which is mainly supported by the high maturity and capacity that the internet communication offers, and that is supposed to be the revolution that will democratized the technology. According to these statements, the goal from this master thesis is to disrupt the traditional machining business model, with a new business model concept based on the platform business model, offering a complete solution for the targeted group of users. With help from the self-developed proceeding model for the business model generation, all the aspects related to the current existing types of machining business models have been analyzed and documented, being identified 7 different types of models. In addition to this, a deep research in the platform ecosystem has given as a result, plenty of insights and characteristics that must be taken in account for a successful implementation of a platform system into the machining industry. Following the proceeding model step by step, the user’s identification has been done obtaining their biggest problems and objectives they want to achieve related with the machining industry. Mixing up all these ingredients together in a structured way has given as result a list of pain relievers and gain creators that fulfills the users’ needs. And to culminate the work, the rest of the 9 blocks from Osterwalders business model generator have been defined, keeping always the vision of the “machining platform” in mind. The final outcome from this master thesis is then a business model based on the platform concept applied to the machining industry.
Project website. Responsible Research and Innovation approach for transitioning the traditional industry regions into digitalised industry territories.
Creators: name: Magaña, Mario
Publisher: name: Zenodo
Year: 2021
Subjects: IRR
digiterri
H2020
innovation system & digitalization
dissemination
website

description: This deliverable shows and describes the sections of the first version of the DigiTeRRI project website, which has been published on March 2020. The website, which serves as a critical tool for the external communication of the Consortium with the various audiences, provides general information about the project (e.g., objectives, consortium, methodology), including relevant updates. Interaction and user engagement is measured with Google Analytics, including origin of users and on-site behaviour, among other aspects. A second version of the website is expected to be published soon with a specific site for each territory, displayed in their respective local language; a news section; and the relevant people from each team and an updated contact site.
Overhauling SC Atomics in C11 and OpenCL
Creators: name: Batty, Mark
name: Donaldson, Alastair F.
name: Wickerson, John
Publisher: name: arXiv
Year: 2015
Subjects: subject: Programming Languages (cs.PL)
subject: FOS: Computer and information sciences
subject: D.3.1; D.3.3; F.3.2

description: Despite the conceptual simplicity of sequential consistency (SC), the semantics of SC atomic operations and fences in the C11 and OpenCL memory models is subtle, leading to convoluted prose descriptions that translate to complex axiomatic formalisations. We conduct an overhaul of SC atomics in C11, reducing the associated axioms in both number and complexity. A consequence of our simplification is that the SC operations in an execution no longer need to be totally ordered. This relaxation enables, for the first time, efficient and exhaustive simulation of litmus tests that use SC atomics. We extend our improved C11 model to obtain the first rigorous memory model formalisation for OpenCL (which extends C11 with support for heterogeneous many-core programming). In the OpenCL setting, we refine the SC axioms still further to give a sensible semantics to SC operations that employ a 'memory scope' to restrict their visibility to specific threads. Our overhaul requires slight strengthenings of both the C11 and the OpenCL memory models, causing some behaviours to become disallowed. We argue that these strengthenings are natural, and that all of the formalised C11 and OpenCL compilation schemes of which we are aware (Power and x86 CPUs for C11, AMD GPUs for OpenCL) remain valid in our revised models. Using the Herd memory model simulator, we show that our overhaul leads to an exponential improvement in simulation time for C11 litmus tests compared with the original model, making exhaustive simulation competitive, time-wise, with the non-exhaustive CDSChecker tool.
description: Published in the proceedings of the 43rd Annual ACM SIGPLAN-SIGACT Symposium on Principles of Programming Languages (POPL), 2016
Quantum Architecture Search with Meta-learning
Creators: name: He, Zhimin
name: Chen, Chuangtao
name: Li, Lvzhou
name: Zheng, Shenggen
name: Situ, Haozhen
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Variational quantum algorithms (VQAs) have been successfully applied to quantum approximate optimization algorithms, variational quantum compiling and quantum machine learning models. The performances of VQAs largely depend on the architecture of parameterized quantum circuits (PQCs). Quantum architecture search (QAS) aims to automate the design of PQCs in different VQAs with classical optimization algorithms. However, current QAS algorithms do not use prior experiences and search the quantum architecture from scratch for each new task, which is inefficient and time consuming. In this paper, we propose a meta quantum architecture search (MetaQAS) algorithm, which learns good initialization heuristics of the architecture (i.e., meta-architecture), along with the meta-parameters of quantum gates from a number of training tasks such that they can adapt to new tasks with a small number of gradient updates, which leads to fast learning on new tasks. The proposed MetaQAS can be used with arbitrary gradient-based QAS algorithms. Simulation results of variational quantum compiling on three- and four-qubit circuits show that the architectures optimized by MetaQAS converge much faster than a state-of-the-art gradient-based QAS algorithm, namely DQAS. MetaQAS also achieves a better solution than DQAS after fine-tuning of gate parameters.
Multiple Loop Self-Triggered Model Predictive Control for Network Scheduling and Control
Creators: name: Henriksson, Erik
name: Quevedo, Daniel E.
name: Peters, Edwin G. W.
name: Sandberg, Henrik
name: Johansson, Karl Henrik
Publisher: name: arXiv
Year: 2015
Subjects: subject: Systems and Control (eess.SY)
subject: Optimization and Control (math.OC)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Mathematics

description: We present an algorithm for controlling and scheduling multiple linear time-invariant processes on a shared bandwidth limited communication network using adaptive sampling intervals. The controller is centralized and computes at every sampling instant not only the new control command for a process, but also decides the time interval to wait until taking the next sample. The approach relies on model predictive control ideas, where the cost function penalizes the state and control effort as well as the time interval until the next sample is taken. The latter is introduced in order to generate an adaptive sampling scheme for the overall system such that the sampling time increases as the norm of the system state goes to zero. The paper presents a method for synthesizing such a predictive controller and gives explicit sufficient conditions for when it is stabilizing. Further explicit conditions are given which guarantee conflict free transmissions on the network. It is shown that the optimization problem may be solved off-line and that the controller can be implemented as a lookup table of state feedback gains. Simulation studies which compare the proposed algorithm to periodic sampling illustrate potential performance gains.
description: Accepted for publication in IEEE Transactions on Control Systems Technology
On the Enabling of Multi-receiver Communications with Reconfigurable Intelligent Surfaces
Creators: name: Taghvaee, Hamidreza
name: Jain, Akshay
name: Abadal, Sergi
name: Gradoni, Gabriele
name: Alarcón, Eduard
name: Cabellos-Aparicio, Albert
Publisher: name: arXiv
Year: 2021
Subjects: subject: Signal Processing (eess.SP)
subject: Applied Physics (physics.app-ph)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Physical sciences

description: The reconfigurable intelligent surface is a promising technology for the manipulation and control of wireless electromagnetic signals. In particular, it has the potential to provide significant performance improvements for wireless networks. However, to do so, a proper reconfiguration of the reflection coefficients of unit cells is required, which often leads to complex and expensive devices. To amortize the cost, one may share the system resources among multiple transmitters and receivers. In this paper, we propose an efficient reconfiguration technique providing control over multiple beams independently. Compared to time-consuming optimization techniques, the proposed strategy utilizes an analytical method to configure the surface for multi-beam radiation. This method is easy to implement, effective and efficient since it only requires phase reconfiguration. We analyze the performance for indoor and outdoor scenarios, given the broadcast mode of operation. The aforesaid scenarios encompass some of the most challenging scenarios that wireless networks encounter. We show that our proposed technique provisions sufficient improvements in the observed channel capacity when the receivers are close to the surface in the indoor office environment scenario. Further, we report a considerable increase in the system throughput given the outdoor environment.
The X-ray Flux Distribution of Sagittarius A* as Seen by Chandra
Creators: name: Neilsen, J.
name: Markoff, S.
name: Nowak, M. A.
name: Dexter, J.
name: Witzel, G.
name: Barrière, N.
name: Li, Y.
name: Baganoff, F. K.
name: Degenaar, N.
name: Fragile, P. C.
name: Gammie, C.
name: Goldwurm, A.
name: Grosso, N.
name: Haggard, D.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present a statistical analysis of the X-ray flux distribution of Sgr A* from the Chandra X-ray Observatory's 3 Ms Sgr A* X-ray Visionary Project (XVP) in 2012. Our analysis indicates that the observed X-ray flux distribution can be decomposed into a steady quiescent component, represented by a Poisson process with rate $Q=(5.24\pm0.08)\times10^{-3}$ cts s$^{-1},$ and a variable component, represented by a power law process ($dN/dF\propto F^{-ξ},$ $ξ=1.92_{-0.02}^{+0.03}$). This slope matches our recently-reported distribution of flare luminosities. The variability may also be described by a log-normal process with a median unabsorbed 2-8 keV flux of $1.8^{+0.9}_{-0.6}\times10^{-14}$ erg s$^{-1}$ cm$^{-2}$ and a shape parameter $σ=2.4\pm0.2,$ but the power law provides a superior description of the data. In this decomposition of the flux distribution, all of the intrinsic X-ray variability of Sgr A* (spanning at least three orders of magnitude in flux) can be attributed to flaring activity, likely in the inner accretion flow. We confirm that at the faint end, the variable component contributes ~10% of the apparent quiescent flux, as previously indicated by our statistical analysis of X-ray flares in these Chandra observations. Our flux distribution provides a new and important observational constraint on theoretical models of Sgr A*, and we use simple radiation models to explore the extent to which a statistical comparison of the X-ray and infrared can provide insights into the physics of the X-ray emission mechanism.
description: 13 pages, 7 figures, accepted for publication in ApJ. Comments welcome
Magnetization process and ordering of the $S=1/2$ pyrochlore magnet in a field
Creators: name: Hagymási, Imre
name: Schäfer, Robin
name: Moessner, Roderich
name: Luitz, David J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the $S=1/2$ pyrochlore Heisenberg antiferromagnet in a magnetic field. Using large scale density-matrix renormalization group (DMRG) calculations for clusters up to $128$ spins, we find indications for a finite triplet gap, causing a threshold field to nonzero magnetization in the magnetization curve. We obtain a robust saturation field consistent with a magnon crystal, although the corresponding $5/6$ magnetization plateau is very slim and possibly unstable. Most remarkably, there is a pronounced and apparently robust $\frac 1 2$ magnetization plateau where the groundstate breaks (real-space) rotational symmetry, exhibiting oppositely polarised spins on alternating kagome and triangular planes. Reminiscent of the kagome ice plateau of the pyrochlore Ising magnet known as spin ice, it arises via a much more subtle `quantum order by disorder' mechanism.
description: 9 pages, 6 figures
Standard monomial theory for wonderful varieties
Creators: name: Bravi, Paolo
name: Chirivì, Rocco
name: Gandini, Jacopo
name: Maffei, Andrea
Publisher: name: arXiv
Year: 2015
Subjects: subject: Algebraic Geometry (math.AG)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 14M27, 13F50, 20G05

description: A general setting for a standard monomial theory on a multiset is introduced and applied to the Cox ring of a wonderful variety. This gives a degeneration result of the Cox ring to a multicone over a partial flag variety. Further, we deduce that the Cox ring has rational singularities.
description: v3: 20 pages, final version to appear on Algebras and Representation Theory. The final publication is available at Springer via http://dx.doi.org/10.1007/s10468-015-9586-z. v2: 20 pages, examples added in Section 3 and in Section 4
Report on AM future scenarios and strategies
Creators: name: Hörlesberger, Marianne
name: Kasztler, Andrea
name: Beatrix, Wepner
Publisher: name: Zenodo
Year: 2022
Subjects: Foresight key factors
Scenario development
Future thinking
Foresight

description: Four future scenarios for the AM webs of innovation value chains and their open-ings for RRI are co-created, described, discussed, and their chances and risks elabo-rated.
A congested schedule-based dynamic transit passenger flow estimator using stop count data
Creators: name: Liu, Qi
name: Chow, Joseph Y. J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computers and Society (cs.CY)
subject: Optimization and Control (math.OC)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: A dynamic transit flow estimation model based on congested schedule-based transit equilibrium assignment is proposed using observations from stop count data. A solution algorithm is proposed for the mathematical program with schedule-based transit equilibrium constraints (MPEC) with polynomial computational complexity. The equilibrium constraints corresponding to the schedule-based hyperpath flow are modified from the literature to fit into an estimation problem. Computational experiments are conducted first to verify the methodology with two synthetic data sets (one of which is Sioux Falls), followed by a validation of the method using bus data from Qingpu District in Shanghai, China, with 4 bus lines, 120 segments, 55 bus stops, and 120 one-minute intervals. The estimation model converged to 0.005 tolerance of relative change in 10 iterations. The estimated average of segment flows are only 2.5% off from the average of the observed segment flows; relative errors among segments are 42.5%.
The pickup and delivery problem with synchronized en-route transfers for microtransit planning
Creators: name: Fu, Zhexi
name: Chow, Joseph Y. J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: Microtransit and other flexible transit fleet services can reduce costs by incorporating transfers. However, transfers are costly to users if they must get off a vehicle and wait at a stop for another pickup. A mixed integer linear programming model (MILP) is proposed to solve pickup and delivery problems with vehicle-synchronized en-route transfers (PDPSET). The transfer location is determined by the model and can be located at any candidate node in the network rather than a static facility defined in advance. The transfer operation is strictly synchronized between vehicles within a hard time window. A heuristic algorithm is proposed to solve the problem with an acceptable solution in a much shorter computation time than commercial software. Two sets of synthetic numerical experiments are tested: small-scale instances based on a 5x5 grid network, and large-scale instances of varying network sizes up to 250x250 grids to test scalability. The results show that adding synchronized en-route transfers in microtransit can further reduce the total cost by 10% on average and maximum savings can reach up to 19.6% in our small-scale test instances. The heuristic on average has an optimality gap less than 1.5% while having a fraction of the run time and can scale up to 250x250 grids with run times within 1 minute. Two large-scale examples demonstrate that over 50% of vehicle routes can be further improved by synchronized en-route transfers and the maximum savings in vehicle travel distance that can reach up to 20.37% for the instance with 100 vehicles and 300 requests on a 200x200 network.
An extreme gravitationally redshifted iron line at 4.8 keV in Mrk 876
Creators: name: Bottacini, Eugenio
name: Orlando, Elena
name: Greiner, Jochen
name: Ajello, Marco
name: Moskalenko, Igor
name: Persic, Massimo
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: X-ray spectral lines at unforeseen energies are important because they can shed light on the extreme physical conditions of the environment around the supermassive black holes of active galactic nuclei (AGN). Mrk 876 displays such a line at 4.8 keV rest-frame energy. A possible interpretation of its origin can be found in the hotspot scenario. In this scenario the primary radiation from a flare in the hot corona of an AGN illuminates a limited portion of the accretion disk that emits by fluorescence. In this context the line can represent an extreme gravitationally redshifted Fe line originating on the accretion disk below 6 gravitational radii from a rotating supermassive black hole. The correct estimate of the line significance requires a dedicated approach. Based on an existing rigorous approach, we have performed extensive Monte Carlo simulations. We determine that the line is a real feature at ~99 confidence level.
description: ApJL accepted
Unsteady Numerical Simulation of the Pressure Distribution in a Ball-on-Disc Tribometer = Instationäre numerische Simulation der Druckverteilung in einem Kugel-Scheibe Tribometer
Creators: name: Kacan, Altay
Publisher: name: Karlsruher Institut für Technologie (KIT)
Year: 2021

description: Die Schmierung von Oberflächen, welche sich in Relativbewegung befinden, ist sehr wichtig, um unnötige Energieverluste wegen Reibung zu vermeiden. Das gezielte Einbringen von Oberflächentexturen ist die Verringerung des Reibungsverlusts und die Erhöhung der Belastungskapazität. Der Mangel an allgemeingültigen Aussagen und widersprüchlichen Erkenntnisse aus der Literatur sind die Hauptherausforderungen für eine weitverbreitete Nutzung von Oberflächentexturen. Kugel-Scheibe Tribometer werden benutzt, um die Eigenschaften von realen Reibkontakten in einem Labor zu voraussagen. Diese Bachelorarbeit baut auf der Arbeit von Erik Hansen auf, die ein solches Kugel-Scheibe Tribometer in stationären Zuständen simuliert, um es für instationäre Effekte zu erweitern. Bei den Simulationen wird eine Mikrotextur in die Kugeloberfläche eingesetzt und der Algorithmus entsprechend angepasst. Das Ziel dieser Arbeit ist die Validierung der numerischen Vorhersagen durch den Vergleich mit experimentellen Ergebnissen von Literatur. Die verwendeten Gleichungen werden hergeleitet und erläutert. Die numerischen Ansätze und die Funktionsprinzipien der verwendeten Algorithmen werden detailliert beschrieben. Es wird eine gute Übereinstimmung zwischen den Simulationsergebnissen und experimentellen Daten aus der Literatur gefunden. Das Gesamtverhalten des neuen Solvers wird ebenfalls untersucht. Es werden Simulationen mit unterschiedlichen räumlichen Gittergrößen mit proportional skalierten Zeitschritten und konstanten Gittergrößen mit wechselnden Zeitschrittgrößen durchgefuhrt und analysiert. Es zeigt sich, dass gröbere Gitter großen Abweichungen von den experimentellen Ergebnissen entsprechen, die untersuchten feinsten Gitter aber mit langen Rechenzeiten und großem Rechenaufwand verbunden waren, so dass je nach Anforderung ein Kompromiss getroffen werden muss.
Common neighbours and the local-community-paradigm for link prediction in bipartite networks
Creators: name: Daminelli, Simone
name: Thomas, Josephine Maria
name: Durán, Claudio
name: Cannistraci, Carlo Vittorio
Publisher: name: arXiv
Year: 2015
Subjects: subject: Social and Information Networks (cs.SI)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Bipartite networks are powerful descriptions of complex systems characterized by two different classes of nodes and connections allowed only across but not within the two classes. Surprisingly, current complex network theory presents a theoretical bottle-neck: a general framework for local-based link prediction directly in the bipartite domain is missing. Here, we overcome this theoretical obstacle and present a formal definition of common neighbour index (CN) and local-community-paradigm (LCP) for bipartite networks. As a consequence, we are able to introduce the first node-neighbourhood-based and LCP-based models for topological link prediction that utilize the bipartite domain. We performed link prediction evaluations in several networks of different size and of disparate origin, including technological, social and biological systems. Our models significantly improve topological prediction in many bipartite networks because they exploit local physical driving-forces that participate in the formation and organization of many real-world bipartite networks. Furthermore, we present a local-based formalism that allows to intuitively implement neighbourhood-based link prediction entirely in the bipartite domain.
Multiscale modelling of desquamation in the interfollicular epidermis
Creators: name: Miller, Claire
name: Crampin, Edmund
name: Osborne, James
Publisher: name: arXiv
Year: 2021
Subjects: subject: Tissues and Organs (q-bio.TO)
subject: Subcellular Processes (q-bio.SC)
subject: FOS: Biological sciences

description: Maintenance of epidermal thickness is critical to the barrier function of the skin. Decreased tissue thickness, specifically in the stratum corneum (the outermost layer of the tissue), causes discomfort and inflammation, and is related to several severe diseases of the tissue. In order to maintain both stratum corneum thickness and overall tissue thickness it is necessary for the system to balance cell proliferation and cell loss. Cell proliferation in the epidermis occurs in the basal layer and causes constant upwards movement in the tissue. Cell loss occurs when dead cells at the top of the tissue are lost to the environment through a process called desquamation. Desquamation is thought to occur through a gradual reduction in adhesion between cells, due to the cleaving of adhesion proteins by enzymes, in the stratum corneum. In this paper we will investigate combining a (mass action) subcellular model of desquamation with a three dimensional (cell centre based) multicellular model of the interfollicular epidermis to better understand maintenance of epidermal thickness. These investigations show that hypothesised biological models for the degradation of cell-cell adhesion from the literature are able to provide a consistent rate of cell loss in the multicellular model. This loss balances proliferation, and hence maintains a homeostatic tissue thickness. Moreover, we find that multiple proliferative cell populations in the basal layer can be represented by a single proliferative cell population, simplifying investigations with this model. The model is used to investigate a disorder (Netherton Syndrome) which disrupts desquamation. The model shows how biochemical changes can cause disruptions to the tissue, resulting in a reduced tissue thickness and consequently diminishing the protective role of the tissue. A hypothetical treatment result is also investigated. [ABR]
Additional file 7: of Phylogenomics provides a robust topology of the major cnidarian lineages and insights on the origins of key organismal traits
Creators: name: Kayal, Ehsan
name: Bentlage, Bastian
name: M. Sabrina Pankey
name: Ohdera, Aki
name: Medina, Monica
name: Plachetzki, David
name: Collins, Allen
name: Ryan, Joseph
Publisher: name: Figshare
Year: 2018
Subjects: subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Evolutionary Biology
subject: 69999 Biological Sciences not elsewhere classified
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: GO analyses of N. vectensis complements from phylogenomic datasets analyzed, including the molecular function and biological processes categories. For each GO category, functional classes are annotated by color and their relative enrichment (green) or depletion (red) is given in heatmaps left of the GO term description. Inset describes dataset order for heatmaps. (PDF 619 kb)
Multi-qubit quantum phase gates based on surface plasmons of a nanosphere
Creators: name: Ren, Jun
name: Yuan, Jun
name: Zhang, Xiangdong
Publisher: name: arXiv
Year: 2015
Subjects: subject: Optics (physics.optics)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The Dicke subradiance and superradiance resulting from the interaction between surface plasmons of a nanosphere and an ensemble of quantum emitters have been investigated using a Green function approach. Based on such an investigation, we propose a scheme for a deterministic multiqubit quantum phase gate. As an example, twoqubit, threequbit, and fourqubit quantum phase gates have been designed and analyzed in detail. Phenomena due to the losses in the metal are discussed. Potential applications of these phenomena to quantuminformation processing are anticipated.
description: arXiv admin note: text overlap with arXiv:1002.1419 by other authors
Direction reversing active Brownian particle in a harmonic potential
Creators: name: Santra, Ion
name: Basu, Urna
name: Sabhapandit, Sanjib
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We study the two-dimensional motion of an active Brownian particle of speed $v_0$, with intermittent directional reversals in the presence of a harmonic trap of strength $μ$. The presence of the trap ensures that the position of the particle eventually reaches a steady state where it is bounded within a circular region of radius $v_0/μ$, centered at the minimum of the trap. Due to the interplay between the rotational diffusion constant $D_R$, reversal rate $γ$, and the trap strength $μ$, the steady state distribution shows four different types of shapes, which we refer to as active-I & II, and passive-I & II phases. In the active-I phase, the weight of the distribution is concentrated along an annular region close to the circular boundary, whereas in active-II, an additional central diverging peak appears giving rise to a Mexican hat-like shape of the distribution. The passive-I is marked by a single Boltzmann-like centrally peaked distribution in the large $D_R$ limit. On the other hand, while the passive-II phase also shows a single central peak, it is distinguished from passive-I by a non-Boltzmann like divergence near the origin. We characterize these phases by calculating the exact analytical forms of the distributions in various limiting cases. In particular, we show that for $D_R\llγ$, the shape transition of the two-dimensional position distribution from active-II to passive-II occurs at $μ=γ$. We compliment these analytical results with numerical simulations beyond the limiting cases and obtain a qualitative phase diagram in the $(D_R,γ,μ^{-1})$ space.
Generalizations of Some Concentration Inequalities
Creators: name: Bhat, M. Ashraf
name: Kosuru, G. Sankara Raju
Publisher: name: arXiv
Year: 2021
Subjects: subject: Functional Analysis (math.FA)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60E15, 28A25

description: For a real-valued measurable function $f$ and a nonnegative, nondecreasing function $ϕ$, we first obtain a Chebyshev type inequality which provides an upper bound for $\displaystyle ϕ(λ_{1}) μ(\{x \in Ω: f(x) \geq λ_{1} \}) + \sum_{k=2}^{n}\left(ϕ(λ_{k})- ϕ(λ_{k-1})\right) μ(\{x \in Ω: f(x) \geq λ_{k}\}) ,$ where $0 < λ_1 < λ_2 \cdots λ_n < \infty$. Using this, generalizations of a few concentration inequalities such as Markov, reverse Markov, Bienaymé-Chebyshev, Cantelli and Hoeffding inequalities are obtained.
description: 11 pages
A Flexible System for Automatic Quality Control of Oceanographic Data
Creators: name: Castelão, Guilherme P.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: Sampling errors are inevitable when measuring the ocean; thus, to achieve a trustable set of observations requires a quality control (QC) procedure capable to detect spurious data. While manual QC by human experts minimizes errors, it is inefficient to handle large datasets and vulnerable to inconsistencies between different experts. Although automatic QC circumvents those issues, the traditional methods results in high rates of false positives. Here, I propose a novel approach to automatically QC oceanographic data based on the anomaly detection technique. Multiple tests are combined into a single, multidimensional criterion that learns the behavior of the good measurements, and identifies bad samples as outliers. When applied to 13 years of hydrographic profiles, the anomaly detection resulted in the best classification performance, reducing the error by at least 50%. An open source Python package, CoTeDe, was developed to provide state of the art tools to quality control oceanographic data.
On the performance of a linearized dual parallel Mach-Zehnder electro-optic modulator
Creators: name: Perez, Joaquin
name: Llorente, Roberto
Publisher: name: arXiv
Year: 2014
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The performance of a dual parallel differential Mach-Zehnder modulator broadband linearization architecture is analysed. This study provides experimental and analytical results showing an enhancement up to 20 dB in the 3rd-order intermodulation distortion factor at 5 GHz using RF and optical asymmetrical feeding factors.
description: 10 pages, 5 figures
SOYADAN OZIQ-OVQAT ISHLAB CHIQARISHDA FOYDALANISHNING BIOLOGIK VA TEXNOLOGIK JIHATLARI
Creators: name: Salayeva, U.SH.
Publisher: name: Zenodo
Year: 2023

description: Soya Sharqiy Osiyodan kelib chiqqan. Qadimgi Xitoyda soya guruch, bug'doy, arpa va tariq bilan birga muqaddas o'simlik hisoblangan. Soyaning yuqori ozuqaviy qiymati va uning shifobaxsh xususiyatlari Yaponiya, Xitoy, Koreya va Manchuriyadagi odamlarga 5 ming yil avval ma'lum bo'lgan. O'simlikshunoslar va shifokorlar tomonidan olib borilgan tadqiqotlar soyaning o'ziga xos xususiyatini - yog 'kislotalari va qimmatli o'simlik oqsilining noyob birikmasini aniqladi.
Additional file 1: of Interventions for improving pharmacist-led patient counselling in the community setting: a systematic review
Creators: name: Sinaa Al Aqeel
name: Abanmy, Norah
name: AlShaya, Hiba
name: Albatoul Almeshari
Publisher: name: Figshare
Year: 2018
Subjects: subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Computational Biology

description: PRISMA checklist. (DOC 58Â kb)
Unavoidable induced subgraphs in large graphs with no homogeneous sets
Creators: name: Chudnovsky, Maria
name: Kim, Ringi
name: Oum, Sang-il
name: Seymour, Paul
Publisher: name: arXiv
Year: 2015
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C55

description: A homogeneous set of an $n$-vertex graph is a set $X$ of vertices ($2\le |X|\le n-1$) such that every vertex not in $X$ is either complete or anticomplete to $X$. A graph is called prime if it has no homogeneous set. A chain of length $t$ is a sequence of $t+1$ vertices such that for every vertex in the sequence except the first one, its immediate predecessor is its unique neighbor or its unique non-neighbor among all of its predecessors. We prove that for all $n$, there exists $N$ such that every prime graph with at least $N$ vertices contains one of the following graphs or their complements as an induced subgraph: (1) the graph obtained from $K_{1,n}$ by subdividing every edge once, (2) the line graph of $K_{2,n}$, (3) the line graph of the graph in (1), (4) the half-graph of height $n$, (5) a prime graph induced by a chain of length $n$, (6) two particular graphs obtained from the half-graph of height $n$ by making one side a clique and adding one vertex.
description: 13 pages, 3 figures
Experimental and Numerical Investigation of NOx-Emissions by a Biomass Combustion With Oscillating Second Air
Creators: name: Gehrmann, Hans-Joachim
Publisher: name: Centro de Energia e Tecnologia (CENERTEC)
Year: 2022

description: With the Paris Climate Agreement EU aims to reduce the emissions of greenhouse gases by at least 40% by 2030 compared to 1990. In order to achieve this goal the importance of biomass as a solid, lumpy fuel increases steadily. In Germany the substitution of fossil fuels by biomass in heat generation saves 15.7 Mio.t CO2-equivalent yearly. However, the combustion of biomass results in emissions of NOx, fine particles and CO. Since these emissions equally harm humans and environment, their limit values are regularly tightened by the legislature. Hence, in order to minimize the emissions, new and innovative solutions are needed. One possible primary measure for NOx-emissions reduction is the oscillating supply of the secondary air in a staged combustion, which was applied in this work. With the help of this technological approach the study targets the reduction of NOx-emissions down to concentrations below the required maximum permissible values according the German emission standard for clean air. At the Institute for Technical Chemistry (ITC) experiments in a batch-operated reactor have been carried out, in which the combustion behavior of solid fuel discharges as well as the conversion of the formed flue gas under different oxidizing conditions were investigated. If the fuel is burnt sub-stoichiometric in the primary stage, through oscillation of the secondary air supplied to the post-combustion chamber above the fuel bed, the NOx-concentration can be reduced by as much as 40% compared to the non-oscillating operation mode. However, this requires homogeneous conversion of the solid fuel during the primary stage. Complementary to the experiments 3D-combustion modelling of the fuel transformation and nitrogen oxide formation after the secondary air supply to the post-combustion chamber of the reactor have been carried out at LEAT. For the NOx-formation modelling the Eddy-Dissipation-Concept (EDC) combined with In-Situ-Tabulation (ISAT) and a detailed kinetics were applied. The NOx-formation in the lab-reactor was successfully simulated and the results overlap well with the experiments.
Chemically Distinct Nuclei and Outflowing Shocked Molecular Gas in Arp 220
Creators: name: Tunnard, R.
name: Greve, T. R.
name: Garcia-Burillo, S.
name: Carpio, J. Graciá
name: Fischer, J.
name: Fuente, A
name: González-Alfonso, E.
name: Hailey-Dunsheath, S.
name: Neri, R.
name: Sturm, E.
name: Usero, A.
name: Planesas, P.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present the results of interferometric spectral line observations of Arp 220 at 3.5mm and 1.2mm from the Plateau de Bure Interferometer (PdBI), imaging the two nuclear disks in H$^{13}$CN$(1 - 0)$ and $(3 - 2)$, H$^{13}$CO$^+(1 - 0)$ and $(3 - 2)$, and HN$^{13}$C$(3 - 2)$ as well as SiO$(2 - 1)$ and $(6 - 5)$, HC$^{15}$N$(3 - 2)$, and SO$(6_6 - 5_5)$. The gas traced by SiO$(6 - 5)$ has a complex and extended kinematic signature including a prominent P Cygni profile, almost identical to previous observations of HCO$^+(3 - 2)$. Spatial offsets $0.1''$ north and south of the continuum centre in the emission and absorption of the SiO$(6 - 5)$ P Cygni profile in the western nucleus (WN) imply a bipolar outflow, delineating the northern and southern edges of its disk and suggesting a disk radius of $\sim40$ pc, consistent with that found by ALMA observations of Arp 220. We address the blending of SiO$(6 - 5)$ and H$^{13}$CO$^+(3 - 2)$ by considering two limiting cases with regards to the H$^{13}$CO$^+$ emission throughout our analysis. Large velocity gradient (LVG) modelling is used to constrain the physical conditions of the gas and to infer abundance ratios in the two nuclei. Our most conservative lower limit on the [H$^{13}$CN]/[H$^{13}$CO$^+$] abundance ratio is 11 in the WN, cf. 0.10 in the eastern nucleus (EN). Comparing these ratios to the literature we argue on chemical grounds for an energetically significant AGN in the WN driving either X-ray or shock chemistry, and a dominant starburst in the EN.
description: 28 pages, 17 figures, accepted to ApJ