cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
On 4d rank-one N=3 superconformal field theories
Creators: name: Nishinaka, Takahiro
name: Tachikawa, Yuji
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the properties of 4d N=3 superconformal field theories whose rank is one, i.e. those that reduce to a single vector multiplet on their moduli space of vacua. We find that the moduli space can only be of the form C^3/Z_k for k=1,2,3,4,6, and that the supersymmetry automatically enhances to N=4 for k=1,2. In addition, we determine the central charges a and c in terms of k, and construct the associated 2d chiral algebras, which turn out to be exotic N=2 supersymmetric W-algebras.
description: 24 pages
Travelling-wave single-photon detectors integrated with diamond photonic circuits - operation at visible and telecom wavelengths with a timing jitter down to 23 ps
Creators: name: Rath, Patrik
name: Vetter, Andreas
name: Kovalyuk, Vadim
name: Ferrari, Simone
name: Kahl, Oliver
name: Nebel, Christoph
name: Goltsman, Gregory N.
name: Korneev, Alexander
name: Pernice, Wolfram H. P.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Optics (physics.optics)
subject: Superconductivity (cond-mat.supr-con)
subject: Instrumentation and Detectors (physics.ins-det)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We report on the design, fabrication and measurement of travelling-wave superconducting nanowire single-photon detectors (SNSPDs) integrated with polycrystalline diamond photonic circuits. We analyze their performance both in the near-infrared wavelength regime around 1600 nm and at 765 nm. Near-IR detection is important for compatibility with the telecommunication infrastructure, while operation in the visible wavelength range is relevant for compatibility with the emission line of silicon vacancy centers in diamond which can be used as efficient single-photon sources. Our detectors feature high critical currents (up to 31 μA) and high performance in terms of efficiency (up to 74% at 765 nm), noise-equivalent power (down to 4.4*10^-19 W/(Hz^1/2) at 765 nm) and timing jitter (down to 23 ps).
description: 8 pages, 6 figures, Photonics West, Feb 2016, San Francisco, United States, SPIE Proceedings Volume 9750 - On-Chip Quantum Optics
Inspection of Time Series Characteristics of Irradiance Governing the Sizing of PV Systems for High Autonomy in View of Reliability of Predicted Security of Supply
Creators: name: Beyer, H.G.
Publisher: name: WIP
Year: 2021
Subjects: PV Systems – Modelling, Design, Operation and Performance
Design and Installation of PV Systems

description: 38th European Photovoltaic Solar Energy Conference and Exhibition; 1294-1298
description: When designing solar power based clean energy supply systems in all scales – from autonomous devices to solar home systems, village power supply and nation-wide systems - the intended degrees of autonomy and security of supply are key figures. The identification of a reasonable system sizing – the selection of a combination of installed PV and storage capacity - is usually done by use of time step simulations based on an at minimum annual data set of the meteorological conditions. Due to the variability of the meteorological conditions on all time scales and the uncertainty of available data there is consequently an uncertainty on whether the intended performance can be reached over the live time of the systems. In this context, there is a broad discussion on the year-to-year variability of the annual irradiance sum and thus the annual PV generation. Here, effects of the the interannual and database to database variability of the fluctuation characteristics of the irradiance, governing the need for storage is inspected for the case of a simple PV-storage-load system.
Observation of quantum interference between separated mechanical oscillator wavepackets
Creators: name: Kienzler, D.
name: Flühmann, C.
name: Negnevitsky, V.
name: Lo, H. -Y.
name: Marinelli, M.
name: Nadlinger, D.
name: Home, J. P.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Quantum Physics (quant-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: The ability of matter to be superposed at two different locations while being intrinsically connected by a quantum phase is among the most counterintuitive predictions of quantum physics. While such superpositions have been created for a variety of systems, the in-situ observation of the phase coherence has remained out of reach. Using a heralding measurement on a spin-oscillator entangled state, we project a mechanical trapped-ion oscillator into a superposition of two spatially separated states, a situation analogous to Schrödinger's cat. Quantum interference is clearly observed by extracting the occupations of the energy levels. For larger states, we encounter problems in measuring the energy distribution, which we overcome by performing the analogous measurement in a squeezed Fock basis with each basis element stretched along the separation axis. Using 8 dB of squeezing we observe quantum interference for cat states with phase space separations of $Δα= 15.6$, corresponding to wavepackets with a root-mean-square extent of 7.8 nm separated by over 240 nm. We also introduce a method for reconstructing the Wigner phase-space quasi-probability distribution using both squeezed and non-squeezed Fock bases. We apply this to a range of negative parity cats, observing the expected interference fringes and negative values at the center of phase space. Alongside the fundamental nature of these large state superpositions, our reconstruction methods facilitate access to the large Hilbert spaces required to work with mesoscopic quantum superpositions, and may be realized in a wide range of experimental platforms.
title: Advanced 3D Textile Applications for the Building Envelope
Creators: name: Lüling, Claudia
name: Rucker-Gramm, Petra
name: Weilandt, Agnes
name: Beuscher, Johanna
name: Nagel, Dominik
name: Schneider, Jens
name: Maier, Andreas
name: Bauder, Hans-Jürgen
name: Weimer, Timo
Publisher: name: Springer Netherlands
Year: 2024

description: Within the field of textile construction, textiles are traditionally used either as decorative elements in interior design or as flat textiles in tensile-stressed lightweight constructions (roofs, temporary buildings, etc.). Technical textiles made of glass or carbon fibers are now also used as steel substitutes in concrete construction. There, flat textiles are also used as lost formwork or shaping semi-finished products. Applications for 3D textiles and in particular spacer textiles have so far only been investigated as part of multilayer constructions in combination with other elements. Otherwise, there are no studies for their application potential in the roof and wall areas of buildings and as a starting structure for opaque and translucent components. The two research projects presented here, "ReFaTex" (adjustable spacer fabrics for solar shading devices) and "ge3TEX" (warp-knitted, woven and foamed spacer fabrics) illustrate for one thing the possibilities for using 3D textiles for the construction of movable and translucently variable solar protection elements in the building envelope. Otherwise they show how 3D textiles in combination with foamed materials can be transformed into opaque, lightweight, self-supporting and insulated wall and ceiling components in the building envelope. Both projects are designed experimentally and iteratively. The results are compared in a qualifying manner, the aim being not to quantify individual measured variables but to explore the development potential of textile construction for sustainable future components and to realize the first demonstrators. In the ReFaTex project, 1:1 demonstrators with different movement mechanisms for controlling the incidence of light were realized. In the ge3TEX project, 1:1 demonstrators made of three different textile and foam materials were added to form new single-origin composite components for ceiling elements. Both projects show the great application potential for 3D textiles in the construction industry.
Die ekklesiologischen Implikationen von Max Webers idealtypischer Unterscheidung von Gemeinde und Gemeinschaft
Creators: name: Siefer, Gregor
Publisher: name: Concilium
Year: 1970

description: Concilium, Bd. 10 Nr. 1 (1974): Concilium: Internationale Zeitschrift für Theologie, Band 10, Heft 1
Analysis of Electrical Shading Effects in PV Systems
Creators: name: Oliosi, M.
name: Wittmer, B.
name: Mermoud, A.
Publisher: name: WIP
Year: 2021
Subjects: PV Systems – Modelling, Design, Operation and Performance
Design and Installation of PV Systems

description: 38th European Photovoltaic Solar Energy Conference and Exhibition; 1299-1306
description: In a PV system, partial shading of PV modules and strings leads to yield losses not only due to reduced irradiation, but also due to shaded PV cells limiting the current of a string. These so-called electrical shading losses contribute in a non-negligible way to the total losses in a PV system. The detailed calculation of these losses is nontrivial, since it is necessary to combine many IV curves from individual cell strings and determine the resulting curve which can have a much more irregular shape than the simple IV-curve of a group of unshaded strings. Hence, in-depth studies are required to understand and optimize the PV system design. In this work, we explain the different ways in which the PVsyst software handles the electrical shadings. The detailed IV-curve calculation and three simplified models are applied to different PV system configurations, and the impact of partial shadings on the energy yield is assessed. We discuss which calculation models should be used in different situations. By comparing the results for different typical string layouts, and PV module types, we derive some strategies for minimizing electrical shading losses, that can be applied in a general way.
Kinetic Simulation of Slow Magnetosonic Waves and Quasi-periodic Upflows in the Solar Corona
Creators: name: Ruan, Wenzhi
name: He, Jiansen
name: Zhang, Lei
name: Vocks, Christian
name: Marsch, Eckart
name: Tu, Chuanyi
name: Peter, Hardi
name: Wang, Linghua
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Plasma Physics (physics.plasm-ph)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: Quasi-periodic disturbances of emission-line parameters are frequently observed in the corona. These disturbances propagate upward along the magnetic field with speeds $\sim100~\rm{km~s}^{-1}$. This phenomenon has been interpreted as evidence of the propagation of slow magnetosonic waves or argued to be signature of the intermittent outflows superposed on the background plasmas. Here we aim to present a new "wave + flow" model to interpret these observations. In our scenario, the oscillatory motion is a slow mode wave, and the flow is associated with a beam created by the wave-particle interaction owing to Landau resonance. With the help of a Vlasov model, we simulate the propagation of the slow mode wave and the generation of the beam flow. We find that weak periodic beam flows can be generated owing to Landau resonance in the solar corona, and the phase with strongest blueward asymmetry is ahead of that with strongest blueshift by about 1/4 period. We also find that the slow wave damps to the level of 1/e after the transit time of two wave periods, owing to Landau damping and Coulomb collisions in our simulation. This damping time scale is similar to that resulting from thermal-conduction in the magnetohydrodynamics regime. The beam flow is weakened/attenuated with increasing wave period and decreasing wave amplitude since Coulomb collision becomes more and more dominant over the wave action. We suggest that this "wave + flow" kinetic model provides an alternative explanation for the observed quasi-periodic propagating perturbations in various parameters in the solar corona.
Grassmannization of classical models
Creators: name: Pollet, Lode
name: Kiselev, Mikhail N.
name: Prokof'ev, Nikolay V.
name: Svistunov, Boris V.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Applying Feynman diagrammatics to non-fermionic strongly correlated models with local constraints might seem generically impossible for two separate reasons: (i) the necessity to have a Gaussian (non-interacting) limit on top of which the perturbative diagrammatic expansion is generated by Wick's theorem, and (ii) the Dyson's collapse argument implying that the expansion in powers of coupling constant is divergent. We show that for arbitrary classical lattice models both problems can be solved/circumvented by reformulating the high-temperature expansion (more generally, any discrete representation of the model) in terms of Grassmann integrals. Discrete variables residing on either links, plaquettes, or sites of the lattice are associated with the Grassmann variables in such a way that the partition function (and correlations) of the original system and its Grassmann-field counterpart are identical. The expansion of the latter around its Gaussian point generates Feynman diagrams. A proof-of-principle implementation is presented for the classical 2D Ising model. Our work paves the way for studying lattice gauge theories by treating bosonic and fermionic degrees of freedom on equal footing.
description: 17 pages, 13 figures, 1 table
Designing Applications in a Hybrid Cloud
Creators: name: Nikulchev, Evgeny
name: Pluzhnik, Evgeniy
name: Biryukov, Dmitry
name: Lukyanchikov, Oleg
Publisher: name: arXiv
Year: 2015
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Data Structures and Algorithms (cs.DS)
subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Designing applications for hybrid cloud has many features, including dynamic virtualization management and route switching. This makes it impossible to evaluate the query and hence the optimal distribution of data. In this paper, we formulate the main challenges of designing and simulation, offer installation for processing.
description: 8 pages
A comparative performance study of the routing protocols RPL, LOADng and LOADng-CTP with bidirectional traffic for AMI scenario
Creators: name: Elyengui, Saida
name: Bouhouchi, Riadh
name: Ezzedine, Tahar
Publisher: name: arXiv
Year: 2016
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: With the introduction of the smart grid, Advanced Metering Infrastructure (AMI) has become a main component in the present power system. The effective implementation of AMI depends widely on its communication infrastructure and protocols providing trustworthy two-way communications. In this paper we study two routing protocols philosophies for low power and lossy networks (LLNs) and their application for a smart metering scenario. This study purposes a detailed evaluation of two routing protocols proposed by IETF the proactive candidate namely RPL (IPv6 Routing Protocol for Low-Power and Lossy Networks) and the reactive candidate named LOADng (LLN On-demand Ad-hoc Distance vector routing protocol - next generation) recently proposed as an Internet Draft, still in its design phase and is part of the ITU-T G.9903 recommendation. In the course of this study, we also implemented an extension version of LOADng named LOADng-CTP specified by an IETF draft extended with a collection tree for efficient data acquisition in LLNs. We performed checks on control overhead; End to End Delay and Packet delivery ratio for the two protocols related to multipoint-to-point (MP2P), and point-to-multi point (P2MP) traffic flow in a realistic smart metering architecture.
description: arXiv admin note: text overlap with arXiv:1506.06357
[C.3.67.a.] Au-devant de la vie
Creators: name: Delmas, Georges (Dit Georges Isabelli)
Publisher: name: École des Hautes Études en Sciences Sociales; La Voix des Nôtres
Year: 2023
Subjects: http://www.idref.fr/027261468/id
http://www.idref.fr/028135350/id
http://www.idref.fr/027257592/id
http://www.idref.fr/027489558/id
http://www.idref.fr/027280470/id
http://www.idref.fr/034703926/id
http://www.idref.fr/027416593/id

Abstract
Energetic emissions from deconfinement in compact stars and their relation to the critical end point in the QCD phase diagram
Creators: name: Alvarez-Castillo, D. E.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: In this work we study the case of deconfinement in compact star interiors in the presence of a strong first order phase transition associated to a critical end point in the QCD phase diagram. Neutron stars fulfilling these conditions show a third branch in the mass-radius diagram with the first and second branches being the white dwarfs and neutron stars configurations. The transition to the third branch can be reached by a pure hadronic neutron star through an induced collapse releasing energy that corresponds to a mass-energy difference between the second and third branch configurations. Physical outcomes of this phenomenon that can potentially explain the already detected astrophysical signals are discussed. In particular we present energy estimations for the case of a fast radio burst, seen as a double-peak structure in the object's light curve.
description: 7 pages, 3 figures, prepared for the Proceedings of the Conference "The International Workshop on Quark Phase Transition in Compact Objects and Multimessenger Astronomy: Neutrino Signals, Supernovae and Gamma-Ray Bursts", October 7-14,KChR, Nizhnij Arkhyz (SAO), KBR, Terskol (BNO), Russian Federation
Support academic access to automated cloud labs to improve reproducibility.
Creators: name: Armer, Chase
name: Letronne, Florent
name: DeBenedictis, Erika
Publisher: name: The Francis Crick Institute
Year: 2023
Subjects: Biochemistry & Proteomics
Synthetic Biology
Microfabrication & Bioengineering
Structural Biology & Biophysics
Ecology,Evolution & Ethology
Computational & Systems Biology

description: Cloud labs, where experiments are executed remotely in robotic facilities, can improve the reproducibility, accessibility, and scalability of experimental biology. Funding and training programs will enable academics to overcome barriers to adopting such technology.
Analysis of Supply Chain of Fertilizers in Ethiopia
Creators: name: Hailu, Reta
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2016

description: This study analyzes the supply chain of fertilizers in Ethiopia by assessing the major stakeholders in the country. This study investigated whether fertilizer is delivered to farmers in an efficient way, at the lowest possible costs and in an effective way, with shortest lead time. The researcher employed analytical approach of research design named supply chain analysis which comprises supply chain mapping and measuring chain performance. The study relied on secondary data articles, books, publications and stakeholders records as well as primary data collected from actors of supply chain of fertilizers right from importer up to farmers. Both qualitative and quantitative data interpreted using narrations, tables, graphs, charts, descriptive and inferential statistical methods. The thesis addressed major stakeholders and map out what the supply chain of fertilizers looks like; the study also finds out the lack of integration an d communication among stakeholders, inefficient supply chain in terms of high cost of fertilizers, ineffective supply chain in terms of longer lead time, little involvement of farmers in demand estimation, mismatch between quantity supplied and demanded. Ultimately, recommendation provided for policy improvement from government side and capacity and capability change from supply chain stakeholders including Agricultural Input Supply Enterprise, Ethiopian Shipping and Logistics Service Enterprise, Ethiopian Revenue and Customs Authority and transport companies and that at the end could add knowledge in the area and be also an insight for other researchers to undertake further researches and contribute for efficient and effective supply chain of fertilizers in Ethiopia. Key words: supply chain, fertilizer, monopoly, cooperatives, Ethiopia
PV Fault Detection Threshold at the Module, String, and Inverter Levels
Creators: name: Matam, M.
name: Seigneur, H.
Publisher: name: WIP
Year: 2021
Subjects: PV Systems – Modelling, Design, Operation and Performance
Operation, Performance and Maintenance of PV Systems

description: 38th European Photovoltaic Solar Energy Conference and Exhibition; 1284-1289
description: This paper presents the low and high granular data significance in detecting and classifying the faults in a solar PV fault. In this experimental study, the low granular inverter measurements were collected every 5s and the high granular string and module I-V curves were collected every 40 min. Mainly top four PV faults were induced on the PV modules to understand their impact and signatures they leave at all the three measurement stages. Finally, statistical Analysis of Variance (ANOVA) p-values were computed with the baseline measurements. Besides, box plot analysis has been performed. The results reveal that strings data is sufficient to detect the faults, thus, no need to measure, acquire, and store a few tens of modules data.
title: PHOTONAI—A Python API for rapid machine learning model development
Creators: name: Leenings, Ramona
name: Winter, Nils Ralf
name: Plagwitz, Lucas
name: Holstein, Vincent
name: Ernsting, Jan
name: Sarink, Kelvin
name: Fisch, Lukas
name: Steenweg, Jakob
name: Kleine-Vennekate, Leon
name: Gebker, Julian
name: Emden, Daniel
name: Grotegerd, Dominik
name: Opel, Nils
name: Risse, Benjamin
name: Jiang, Xiaoyi
name: Dannlowski, Udo
name: Hahn, Tim
Publisher: name: University of Muenster, Institutional Repository MIAMI
Year: 2023
Subjects: subject: 610 Medicine and health

description: PHOTONAI is a high-level Python API designed to simplify and accelerate machine learning model development. It functions as a unifying framework allowing the user to easily access and combine algorithms from different toolboxes into custom algorithm sequences. It is especially designed to support the iterative model development process and automates the repetitive training, hyperparameter optimization and evaluation tasks. Importantly, the workflow ensures unbiased performance estimates while still allowing the user to fully customize the machine learning analysis. PHOTONAI extends existing solutions with a novel pipeline implementation supporting more complex data streams, feature combinations, and algorithm selection. Metrics and results can be conveniently visualized using the PHOTONAI Explorer and predictive models are shareable in a standardized format for further external validation or application. A growing add-on ecosystem allows researchers to offer data modality specific algorithms to the community and enhance machine learning in the areas of the life sciences. Its practical utility is demonstrated on an exemplary medical machine learning problem, achieving a state-of-the-art solution in few lines of code. Source code is publicly available on Github, while examples and documentation can be found at www.photon-ai.com.
description: Finanziert durch den Open-Access-Publikationsfonds der Westfälischen Wilhelms-Universität Münster (WWU Münster).
A characterization of tightly triangulated 3-manifolds
Creators: name: Bagchi, Bhaskar
name: Datta, Basudeb
name: Spreer, Jonathan
Publisher: name: arXiv
Year: 2016
Subjects: subject: Geometric Topology (math.GT)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 57Q15, 57R05

description: For a field $\mathbb{F}$, the notion of $\mathbb{F}$-tightness of simplicial complexes was introduced by Kühnel. Kühnel and Lutz conjectured that any $\mathbb{F}$-tight triangulation of a closed manifold is the most economic of all possible triangulations of the manifold. The boundary of a triangle is the only $\mathbb{F}$-tight triangulation of a closed 1-manifold. A triangulation of a closed 2-manifold is $\mathbb{F}$-tight if and only if it is $\mathbb{F}$-orientable and neighbourly. In this paper we prove that a triangulation of a closed 3-manifold is $\mathbb{F}$-tight if and only if it is $\mathbb{F}$-orientable, neighbourly and stacked. In consequence, the Kühnel-Lutz conjecture is valid in dimension $\leq 3$.
description: Corollary 1.5 is new
Assessing after sales services quality: the case of ethio telecom back office
Creators: name: Fatuma, Umer
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2019

description: This study was undertaken to assess after sales service quality in the ethio telecom back office view. After sales service delivered by ethio telecom and also determine whether service quality exerts a strong influence on the level of customer satisfaction; After sales service quality today has become not only the expression of every business enterprise, but also occupies reputed position in every discourse. No business organization can survive without building its customer satisfaction; likewise no organization can make a healthy living without meeting the needs of its customers. Two types of data were collected; Primary Data and Secondary Data. This was necessary since it helped to add to the findings of the study. A simple random sampling and purposive sampling method were used. This ensured that every member of the population had an equal chance of being part of the sample. The sample size chosen was 220 sales staff, where 11 have not returned and 9 are not filled correctly; finally, 200 were collected and interview with 10 senior sales staff was conducted. It was revealed that after sales service providing team were dissatisfied with the services and products of ethio telecom emphasizing that they would not recommend the company's services to people. In addition, they mentioned some of the problems they have with the company that included unresponsive nature of the company's back office staffs, sending across to customers, unsubscribed messages, and poor communication amongst others. In order to improve the services and products of ethio telecom, they recommend that ethio telecom must give attention to reviewing internally back office staffs' response and follow up customer complaints until they are resolved, reward loyal customers and retain them and stop sending unsubscribed messages to customers. On the customer access levels, fiber optic backbone networks are recommended for improved service and reliability. Ethio telecom should provide more training about service quality to customer serving front and back staffs for more understanding of the offering as this has direct impact to customers' expectations and perceptions.
The Impact of Tracking Algorithms and Time Resolution on Energy Yield Modelling of Single Axis Tracker Systems
Creators: name: Neubert, A.
name: Hamer, M.
name: Rainey, P.
name: Mikofski, M.A.
Publisher: name: WIP
Year: 2021
Subjects: PV Systems – Modelling, Design, Operation and Performance
Design and Installation of PV Systems

description: 38th European Photovoltaic Solar Energy Conference and Exhibition; 1290-1293
description: Estimations of the energy production of photovoltaic (PV) plants are often based on simulations with hourly resolution. For single axis tracker systems, where the tracker rotation angles change with time, this introduces systematic errors in the simulation. We discuss the effects of the simulation time resolution on the estimated energy production and the increasing need for sub-hourly simulations when using more enhanced tracking algorithms with independently rotating trackers for plants in complex terrain.
More randomness from a prepare-and-measure scenario with independent devices
Creators: name: Yun-Guang, Han
name: Zhen-Qiang, Yin
name: Hong-Wei, Li
name: Wei, Chen
name: Shuang, Wang
name: Guang-Can, Guo
name: Zheng-Fu, Han
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: How to generate genuine quantum randomness from untrusted devices is an important problem in quantum information processing. Inspired by previous work on a self-testing quantum random number generator [T. Lunghi et al., Phys. Rev. Lett. 114, 150501 (2015)], we present a method to generate quantum randomness from a prepare-and-measure scenario with independent devices. In existing protocols, the quantum randomness depends only on a witness value (e.g., Clauser-Horne-Shimony-Holt value), which is calculated with the observed probabilities. Differently, here all the observed probabilities are directly used to calculate the min-entropy in our method. Through numerical simulation, we find that the min-entropy of our proposed scheme is higher than that in the previous work when a typical untrusted Bennett-Brassard 1984 (BB84) setup is used. Consequently, thanks to the proposed method, more genuine quantum random numbers may be obtained than before.
description: 8 pages, 3 figures
Musenmosaiken der römischen Kaiserzeit
Creators: name: Theophilidou, Eleni
Publisher: name: Trierer Zeitschrift - Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete
Year: 2023

description: Trierer Zeitschrift - Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete, Bd. 47 (1984): Trierer Zeitschrift : für Geschichte und Kunst des Trierer Landes und seiner Nachbargebiete
The implementation of innovation in events in China: a relational perspective
Creators: name: Li, Yanning
Publisher: name: Leeds Beckett University
Year: 2023
Subjects: Uncategorized

description: Many commentators consider innovation to be a vital source of competitive advantage and critical to explanation of why some organisations flourish and others flounder. Although various aspects of innovation have been examined in detail, the implementation of innovation is, as yet, the least understood aspect of the innovation process. This research takes a relational perspective to understand the implementation of innovation within the burgeoning Chinese music festivals sector. Social exchange theory is used as a framework to explain the development of relationships within this research context. Adopting a qualitative research strategy, six detailed case studies were conducted. These involved undertaking one hundred and thirty five in-depth semi-structured interviews with senior staff, junior staff, volunteers, partners and suppliers at six modern music festivals in China. In addition, direct observation, participant observation, and observation of online group discussion and Weibo micro blogs (a Chinese type of Twitter) were also employed. This research enriches the body of knowledge in innovation, social exchange, and event studies by providing a conceptual framework of the role and influence of relationships on the implementation of innovation within the context of Chinese events. Exchange rules and norms, and exchange resources, were found to influence the development of relationships that affected the implementation of innovation in Chinese events. Five sub-factors, namely, identity, equality, social capital (guanxi), event contexts, and the Chinese socio-cultural context, were found to affect people’s choice of exchange rules and norms, and exchange resources. A combination of these factors influenced the development of relationships, resulting in four types of relationships. A combination of these relationships had impacts on the implementation of innovation by influencing the acquisition and use of knowledge and resources that were essential in this process. Four categories of implementation outcomes were identified and incorporated into the conceptual framework. Such combined effects of different relationships were complex, because the impact between harmonious relationships and conflicting relationships was not equal. Although harmonious relationships exerted certain positive influences on the implementation of innovation, conflicting or malfunctional relationships were more dominant. Such influences were also found being mediated by certain event contexts, including the temporary time and organisational structure, and the employment of unpaid staff.
New Findings on the PV Fire Prevention - Firefighter Strategy for in-Roof PV Installations
Creators: name: Muntwyler, U.
name: Schüpbach, E.
Publisher: name: WIP
Year: 2021
Subjects: PV Systems – Modelling, Design, Operation and Performance
Operation, Performance and Maintenance of PV Systems

description: 38th European Photovoltaic Solar Energy Conference and Exhibition; 1275-1277
description: PV Installations pose a relatively low fire hazard. However, there are several reasons for some PV installations to be involved with fire. The fire risk for in-roof PV installations is 20-times greater than on-roof installations[1]. The PV Laboratory of the Berner Fachhochschule BFH and the Engineering office Muntwyler has worked for decades on the prevention of fires in PV installations [2]. In the last few years, this work has been strengthened with the support of the building insurance company (Gebäudeversicherung Bern GVB) of the state of Berne in Switzerland [3]. With a better safety strategy, several fires created by PV components could be avoided. Such a type of safety strategy was developed by the aircraft industry and is used in the gliding community. The author, an experienced glider pilot, uses this safety strategy for PV installations to improve the safety of PV installations.
Iron: A Key Element for Understanding the Origin and Evolution of Interstellar Dust
Creators: name: Dwek, Eli
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The origin and depletion of iron differ from all other abundant refractory elements that make up the composition of the interstellar dust. Iron is primarily synthesized in Type Ia supernovae (SNe Ia) and in core collapse supernovae (CCSN), and is present in the outflows from AGB stars. Only the latter two are observed to be sources of interstellar dust, since searches for dust in SN~Ia have provided strong evidence for the absence of any significant mass of dust in their ejecta. Consequently, more than 65% of the iron is injected into the ISM in gaseous form. Yet, ultraviolet and X-ray observations along many lines of sight in the ISM show that iron is severely depleted in the gas phase compared to expected solar abundances. The missing iron, comprising about 90% of the total, is believed to be locked up in interstellar dust. This suggests that most of the missing iron must have precipitated from the ISM gas by cold accretion onto preexisting silicate, carbon, or composite grains. Iron is thus the only element that requires most of its growth to occur outside the traditional stellar condensation sources. This is a robust statement that does not depend on our evolving understanding of the dust destruction efficiency in the ISM. Reconciling the physical, optical, and chemical properties of such composite grains with their many observational manifestations is a major challenge for understanding the nature and origin of interstellar dust.
description: Accepted for publication in The Astrophysical Journal (8 pages, 7 figures)
Medizinische Instrumente der Römerzeit aus Trier und Umgebung im Rheinischen Landesmuseum Trier
Creators: name: Künzl, Ernst
Publisher: name: Trierer Zeitschrift - Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete
Year: 2023

description: Trierer Zeitschrift - Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete, Bd. 47 (1984): Trierer Zeitschrift : für Geschichte und Kunst des Trierer Landes und seiner Nachbargebiete
State of the Art and Performance of the Photovoltaic (PV) System Fleet in Brussels: an Analysis of 8000 PV Installations
Creators: name: Sarr, B.
name: Leloux, J.
name: Neubourg, G.
name: Declève, G.
name: Tieterickx, R.
name: De Lathouwer, J.
name: Lambert, R.
Publisher: name: WIP
Year: 2021
Subjects: PV Systems – Modelling, Design, Operation and Performance
Operation, Performance and Maintenance of PV Systems

description: 38th European Photovoltaic Solar Energy Conference and Exhibition; 1278-1283
description: The photovoltaic sector is still relatively young in the world and in the Region of Brussels, where most installations are barely ten years old or less. The goal of this study is to provide an overall picture of the state of the art of the photovoltaic park in the Brussels Region. It includes an assessment of the installed equipment, the price of the installations and their performance. More than 8000 PV installations distributed across the Brussels Region were considered in this study with data available up to the end of the year 2019, and including residential and commercial PV systems. The analysis of installation prices highlights the downward trend in prices which continues in 2019 with a reduction ranging from 5% for large systems to 16% for small residential systems compared to 2018. Since 2013, the average decrease in the different installed power categories is almost 40%. The solar resource in Brussels has gradually increased over the last four decades, with an average annual horizontal global solar irradiation over the last forty years of about 1000 kWh/m2. In the last ten years, the average value is estimated at 1078 kWh/m2, about 8% above the average of the last four decades. A historical maximum was recorded in 2018, with 1172 kWh/m2, which is about 18% higher than the average of the last four decades. The median energy yield of PV installations in the Brussels Region over the last decade was around 850 kWh/kWp. The median Performance Ratio of the PV installations in Brussels Region during the last decade was about 65%, which can be considered as a typical and representative value of the PV park. In comparison, typical Performance Ratios in Europe are in the range of 70-80%. This study has also found a correlation between the performance of the installations and certain key parameters such as the installed peak power, the year of commissioning, the brand of photovoltaic panels, the power category or the type of owner of the installation. Comparisons between module brands have also shown that there is no clear correlation between the geographic origin of a module brand and its performance.
A Titanium Nitride Absorber for Controlling Optical Crosstalk in Horn-Coupled Aluminum LEKID Arrays for Millimeter Wavelengths
Creators: name: McCarrick, H.
name: Flanigan, D.
name: Jones, G.
name: Johnson, B. R.
name: Ade, P. A. R.
name: Bradford, K.
name: Bryan, S.
name: Cantor, R.
name: Che, G.
name: Day, P.
name: Doyle, S.
name: Leduc, H.
name: Limon, M.
name: Mauskopf, P.
name: Miller, A.
name: Mroczkowski, T.
name: Tucker, C.
name: Zmuidzinas, J.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We discuss the design and measured performance of a titanium nitride (TiN) mesh absorber we are developing for controlling optical crosstalk in horn-coupled lumped-element kinetic inductance detector arrays for millimeter-wavelengths. This absorber was added to the fused silica anti-reflection coating attached to previously-characterized, 20-element prototype arrays of LEKIDs fabricated from thin-film aluminum on silicon substrates. To test the TiN crosstalk absorber, we compared the measured response and noise properties of LEKID arrays with and without the TiN mesh. For this test, the LEKIDs were illuminated with an adjustable, incoherent electronic millimeter-wave source. Our measurements show that the optical crosstalk in the LEKID array with the TiN absorber is reduced by 66\% on average, so the approach is effective and a viable candidate for future kilo-pixel arrays.
description: 7 pages, 5 figures, accepted for publication in the Journal of Low Temperature Physics
früheste Gebrauchskeramik der Trierer Kaiserthermen (augusteische bis tiberische Zeit)
Creators: name: Goethert-Polaschek, Karin
Publisher: name: Trierer Zeitschrift - Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete
Year: 2023

description: Trierer Zeitschrift - Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete, Bd. 47 (1984): Trierer Zeitschrift : für Geschichte und Kunst des Trierer Landes und seiner Nachbargebiete
Augusteische Bildlampen vom Titelberg (Luxemburg)
Creators: name: Goethert-Polaschek, Karin
Publisher: name: Trierer Zeitschrift - Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete
Year: 2023

description: Trierer Zeitschrift - Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete, Bd. 47 (1984): Trierer Zeitschrift : für Geschichte und Kunst des Trierer Landes und seiner Nachbargebiete
frühen Prägungen der Treverer
Creators: name: Weiller, Raymond
Publisher: name: Trierer Zeitschrift - Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete
Year: 2023

description: Trierer Zeitschrift - Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete, Bd. 47 (1984): Trierer Zeitschrift : für Geschichte und Kunst des Trierer Landes und seiner Nachbargebiete
Effects of Supplier Relationship Management on The Timely Delivery and Quality of Products in Commercial Banks in Ethiopia
Creators: name: Abebe, Adugna
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2017

description: This study was concerned on Supplier Relationship Management and its effect on timely delivery and quality of goods and services acquired by commercial Bank's Operating in Ethiopia. The main objective of the study is to examine the level of the supplier relationship management practice of Commercial Banks on their procurement activities and its effect on the quality and timely delivery of goods and services procured. The study was designed to be conducted on all the Seventeen Commercial Banks Operating in Ethiopia focusing on their procurement units. From these populations, a total sample of 385 participant size was determined using Cochran equation for determining the proportionate sample size then a stratified random sampling was employed as a sampling technique. Each Bank's procurement unit was considered as a stratum. The study has also used both primary and secondary sources. A Likert scale questionnaire was used to collect the primary data. The collected data then has been inserted in to a computer program and processed with the help of SPSS version 20.00 software packages and was analyzed using descriptive statistics, Pearson correlation and multiple regression analysis to detect whether the stated variables are related or not. The major findings of the study indicate that the level of the supplier relationship management in most commercial Banks is very low and the major aspects of supplier relationship management are not yet institutionalized and practiced in the Banking industry in general in that attributes constituting to supplier relationship management and its manifestations are missing in their supplier identification, selection, development, measurement and risk management. The study also reveals that Supplier Relationship Management has a significant positive relationship with quality and timely delivery of goods and services procured by those commercial Bank's studied in this research, however the regression result of supplier relationship management on timely delivery is not as strong as it has been observed on quality indicating existence of other factors explaining timely delivery of goods and services for which suggestion is provided for future researches in this regard. The researcher finally recommends the need for adapting the concept of supplier relationship management by identifying and institutionalizing the concepts of SRM in all the procurement process and thereby improves timely delivery and quality. Keywords: supplier Relationship Management, Quality, Timely Delivery
Gräberfelder von Biewer und Euren
Creators: name: Miron, Andrei
Publisher: name: Trierer Zeitschrift - Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete
Year: 2023

description: Trierer Zeitschrift - Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete, Bd. 47 (1984): Trierer Zeitschrift : für Geschichte und Kunst des Trierer Landes und seiner Nachbargebiete
Experimental Study of the Operation of PV Strings at the MPP Closest to the Nominal MPP Voltage Instead of the Global MPP
Creators: name: Lappalainen, K.
name: Valkealahti, S.
Publisher: name: WIP
Year: 2021
Subjects: PV Systems – Modelling, Design, Operation and Performance
Operation, Performance and Maintenance of PV Systems

description: 38th European Photovoltaic Solar Energy Conference and Exhibition; 1264-1268
description: Under non-uniform operating conditions, photovoltaic (PV) generators can have multiple maximum power points (MPP) which may cause problems for MPP tracking. Since highly varying global MPP (GMPP) voltage causes large fluctuations in the inverter reference voltage, it would be beneficial to keep the operating point of the inverter all the time close to the nominal MPP voltage. In this way, operation of the PV system would be more predictable and straightforward. This paper presents an experimental study based on measured current–voltage curves of two PV strings of a scenario in which the MPP closest to the nominal MPP voltage is used all the time as the operating point instead of the GMPP. In total, 432000 I–U curves measured over 120 hours were analysed. The effects of inverter sizing on the selection of the operating point of the PV strings were also studied. The experimental results presented in this paper demonstrate that the wide operating voltage range when the GMPP is followed can be significantly reduced by operating at the MPP closest to the nominal MPP voltage at a cost of negligible energy losses.
Bibliographie Siegfried Gollub
Creators: name: Merten, Jürgen
Publisher: name: Trierer Zeitschrift - Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete
Year: 2023

description: Trierer Zeitschrift - Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete, Bd. 47 (1984): Trierer Zeitschrift : für Geschichte und Kunst des Trierer Landes und seiner Nachbargebiete