cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Bayesian calibration of traffic flow fundamental diagrams using Gaussian processes
Creators: name: Cheng, Zhanhong
name: Wang, Xudong
name: Chen, Xinyuan
name: Trepanier, Martin
name: Sun, Lijun
Publisher: name: arXiv
Year: 2022
Subjects: subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: Modeling the relationship between vehicle speed and density on the road is a fundamental problem in traffic flow theory. Recent research found that using the least-squares (LS) method to calibrate single-regime speed-density models is biased because of the uneven distribution of samples. This paper explains the issue of the LS method from a statistical perspective: the biased calibration is caused by the correlations/dependencies in regression residuals. Based on this explanation, we propose a new calibration method for single-regime speed-density models by modeling the covariance of residuals via a zero-mean Gaussian Process (GP). Our approach can be viewed as a generalized least-squares (GLS) method with a specific covariance structure (i.e., kernel function) and is a generalization of the existing LS and the weighted least-squares (WLS) methods. Next, we use a sparse approximation to address the scalability issue of GPs and apply a Markov chain Monte Carlo (MCMC) sampling scheme to obtain the posterior distributions of the parameters for speed-density models and the hyperparameters (i.e., length scale and variance) of the GP kernel. Finally, we calibrate six well-known single-regime speed-density models with the proposed method. Results show that the proposed GP-based methods (1) significantly reduce the biases in the LS calibration, (2) achieve a similar effect as the WLS method, (3) can be used as a non-parametric speed-density model, and (4) provide a Bayesian solution to estimate posterior distributions of parameters and speed-density functions.
Combining Solar Irradiance Databases and PV Performance Model for PV System Performance Analysis
Creators: name: Kirn, B.
name: Topic, M.
Publisher: name: WIP
Year: 2016
Subjects: Operation, Performance, Reliability and Sustainability of Photovoltaics
Operation of PV Systems

description: 32nd European Photovoltaic Solar Energy Conference and Exhibition; 1660-1664
description: To analyze the PV system potential for different locations and orientations, PV performance models
coupled with solar irradiance databases are used. We have recently developed direct-diffuse-power-rating (DDPR)
model that separately addresses the diffuse and direct irradiance components supplemented by angular loss
compensation. In this study, the DDPR PV module performance model is extended to PV systems. The 17 kW PV
system located in Ljubljana, Slovenia is used in this experiment to test the accuracy of the model which rendered 3.6%
yearly root mean square error (RMSE) compared to 4.3% RMSE of basic model used as a reference. The major
improvement occurs in the early mornings and late evenings when the diffuse component dominates. Also, the effect
of longer averaging time intervals (which are usually utilized in many solar irradiance databases) on the accuracy of
the PV performance models was researched. The averaging interval analysis showed, that up to 0.28% additional
positive bias is induced for 1 hour averaging intervals compared to 5 minute one. With the use of the DDPR model’s
feature of separating diffuse and direct irradiance, the model was used to estimate the loss or gain of PV system
performance at different locations as well as orientations, different from optimal. The results for Ljubljana, Slovenia
show that yearly temperature compensated performance ratio (PRT) can be 1.8% lower for certain orientations (e.g.
vertical orientation facing south) compared to optimal orientation (south, 30° inclination) due to higher share of direct
irradiance with higher solar incident angles.
Effects of variable thermal diffusivity on the structure of convection
Creators: name: Shcheritsa, O. V.
name: Getling, A. V.
name: Mazhorova, O. S.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The multiscale flow structure in the solar convection zone - the coexistence of such features as the granules, mesogranules, supergranules and giant cells - has not yet been properly understood. Here, the possible role of one physical factor - variations in the thermal diffusivity - in the formation of a multiscale convection structure is investigated. Thermal convection in a plane horizontal fluid layer is numerically simulated. The temperature dependence of thermal diffusivity is chosen so as to produce a sharp kink in the static temperature profile near the upper layer boundary. As a result, the magnitude of the (negative) static temperature gradient dTs/dz, being small over the most part of the layer thickness, reaches large values in a thin boundary sublayer. To identify the structures on different scales, we apply a smoothing procedure, computational-homology techniques and spectral processing to the temperature field. The flow is found to be a superposition of three cellular structures with three different characteristic scales. The largest (first-scale) convection cells, with central upflows, fill the whole layer thickness; most of these cells are divided by bridges, or isthmuses, into a few smaller (second-scale) ones, which are localised in the upper portion of the layer; finally, there are numerous tiny (third-scale) features that dot the horizontal sections of the layer located near its upper boundary and exhibit a tendency of gathering in the intercellular lanes of the first-scale cells. The third-scale cellular structures are advected by the first-scale and second-scale convective flows. The spatial spectrum of the flow does not directly indicate the presence of the second-scale and third-scale structures; however, they can be selected by using our processing techniques. On the whole, the simulated flow pattern qualitatively resembles that observed on the Sun.
description: Accepted by Physics Letters A; 16 pages, 6 figures
Die Fragilität des Körpers
Ein menschenwürdiges Leben durch persönliche Assistenz
Creators: name: Hirschberg, Marianne
Publisher: name: Universität Kassel
Year: 2017
Subjects: subject: Disability Studies
subject: Conditio Humana
subject: Persönliche Assistenz
subject: 100
subject: 300
subject: 360
subject: Disability Studies
subject: Persönliche Assistenz
subject: Menschenrecht
subject: Conditio humana

description: This text was published in Caroline Welsh / Christoph Ostgathe / Andreas Frewer / Heiner Bielefeldt (Hrsg.), Autonomie und Menschenrechte am Lebensende. Theoretische Grundlagen und Reflexionen aus der Praxis, Bielefeld: transcript 2017. It is posted here by permission of transcript Verlag for personal use only, not for redistribution.
Accelerating Plasma Mirrors to Investigate Black Hole Information Loss Paradox
Creators: name: Chen, Pisin
name: Mourou, Gerard
Publisher: name: arXiv
Year: 2015
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The question of whether Hawking evaporation violates unitarity, and therefore results in the loss of information, remains unresolved since Hawking's seminal discovery. So far the investigations remain mostly theoretical since it is almost impossible to settle this paradox through direct astrophysical black hole observations. Here we point out that relativistic plasma mirrors can be accelerated drastically and stopped abruptly by impinging ultra intense x-ray pulses on solid plasma targets with a density gradient. This is analogous to the late time evolution of black hole Hawking evaporation. A conception of such an experiment is proposed and a self-consistent set of physical parameters is presented. Critical issues such as black hole unitarity may be addressed through the measurement of the entanglement between the Hawking radiation and their partner modes.
description: 5 pages, 2 figures
Sites of Narrativity and Spatial Debate
Creators: name: Bula, Dace
Publisher: name: Writingplace
Year: 2022

description: Based on an ethnographic study of the neighbourhoods in the vicinity of the Port of Riga, the article examines people’s engagement with fences surrounding the territory of the port. It reacts to an observation that walls, fences and their materiality are underrepresented in research. Focusing on human engagement with the narrativity of the physical world, the article treats port’s fences as ‘storied matter’. This includes, first, an observation that these built structures constitute a narrative subject matter frequently appearing in the interviews of the lower Daugava residents. In addition, the discursivity of the Port of Riga’s fences is contemplated as constituted by their function, enforced or disputed by spatial forms of discourse (signposts, warnings, graffiti) and shaped via symbolic activities of the involved parties, which both address place-appropriation issues and transform the communicative character of these spatial objects.
description: Writingplace, No. 6 (2022): Meaningfulness, Appropriation and Integration of/in City Narratives
Hamiltonian form of `Carroll' gravity
Creators: name: Sengupta, Sandipan
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We develop a Hamiltonian description of the `Carroll' (Levy Leblond-Sen Gupta) limit of gravity theory in the first-order formalism. Through a constraint analysis, the number of local degrees of freedom are shown to be two in this singular limit. The associated Hamiltonian constraint depends only on the densitized triad fields and their space derivatives. We also provide a scaling prescription within the Hilbert-Palatini theory to obtain the first-order analogue of the `electric' limit of canonical metric gravity. The simplicity of both these limiting Hamiltonian forms in these variables make them interesting candidates for quantization.
description: Version published in Phys. Rev. D
Narrating the Urban Fabric of our Historical Towns
Creators: name: García Esparza, Juan A.
Publisher: name: Writingplace
Year: 2022

description: This article explores informal expressions of cultural heritage in historical towns. The framework in historical urban settlements uses research to analyse the entanglements of urban heritage when surveyed as environments where subcultures and minorities inhabit and create those sites. The approach challenges the idealistic constructed scenarios of the past and provides space for new interpretations on the cultural diversity of the unplannable or informal in place-making. This paper examines the heritage conservation paradox on how historical values can better incorporate past and contemporary anthropological informalities.
description: Writingplace, No. 6 (2022): Meaningfulness, Appropriation and Integration of/in City Narratives
Impact of Wind on Intra-Module Energy Yield Variations
Creators: name: Goverde, H.
name: Van Den Broeck, G.
name: Anagnostos, D.
name: Herteleer, B.
name: Govaerts, J.
name: Goossens, D.
name: Voroshazi, E.
name: Baert, K.
name: Catthoor, F.
name: Driesen, J.
name: Poortmans, J.
Publisher: name: WIP
Year: 2016
Subjects: Operation, Performance, Reliability and Sustainability of Photovoltaics
Operation of PV Systems

description: 32nd European Photovoltaic Solar Energy Conference and Exhibition; 1665-1668
description: The energy yield performance of a novel PV module with 10 strings of 6 cells was investigated. The IV
characteristics of each individual 6-cell string were measured and used to determine the monthly energy yield of each
sub-string. Differences up to +3.7 % compared to the average value were observed. However, analysis of the daily
yield showed variations up to +17.6 %, depending on the wind conditions. These daily yield variations are critical, as
the variations may be masked when using longer-term values, such as monthly or yearly yield. As a result, models
may give a yearly yield value that is close to the measured value but the daily variation in yield may easily exceed
15%. Cumulatively, this will result in large model errors. Forced convection introduces considerable and often
neglected intra-module temperature variations, leading to differences in conversion efficiencies at sub-string level.
These temperature variations need to be taken into account for accurate energy yield evaluations. In addition, this
insight provides guidelines for novel smart PV module technologies that aim to improve energy yield harvesting.
The Concept of Appropriation in Collective Housing Design
Creators: name: Novaković, Nevena
Publisher: name: Writingplace
Year: 2022

description: The article aims to contribute to the theoretical debate on collective housing design by focusing on dwelling as a poetic practice. More precisely, it explores the methodological potential of the concept of appropriation that fosters the understanding of dwelling as the creative practice of human self-realization through space. It does so by interpreting selected writings of Henri Lefebvre and bringing forward exemplary housing projects. The theoretical review concludes with several principles of housing design that underline the importance of the continuity, overlapping and ‘softness’ of dwelling space. Moreover, the article conceptualizes appropriation as an analytical tool for reading the transformation of existing space made by residents. Appropriation narratives, in this way, enable housing design to understand and consider the spatial characteristics that contribute to meaningful emotional connections between space and people on different scales.
description: Writingplace, No. 6 (2022): Meaningfulness, Appropriation and Integration of/in City Narratives
Artificial Intelligence and Machine Learning for Quantum Technologies
Creators: name: Krenn, Mario
name: Landgraf, Jonas
name: Foesel, Thomas
name: Marquardt, Florian
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: In recent years, the dramatic progress in machine learning has begun to impact many areas of science and technology significantly. In the present perspective article, we explore how quantum technologies are benefiting from this revolution. We showcase in illustrative examples how scientists in the past few years have started to use machine learning and more broadly methods of artificial intelligence to analyze quantum measurements, estimate the parameters of quantum devices, discover new quantum experimental setups, protocols, and feedback strategies, and generally improve aspects of quantum computing, quantum communication, and quantum simulation. We highlight open challenges and future possibilities and conclude with some speculative visions for the next decade.
description: 23 pages, 8 figures; comments welcome!
Appropriation and Gendered Spaces
Creators: name: Arslan, Sernaz
Publisher: name: Writingplace
Year: 2022

description: Elena Ferrante’s series Neapolitan Novels (2011-2014) has been characterized as a female bildungsroman that begins in 1950s Naples. It follows the lives of two protagonists, Lenù (Elena) Greco and Lila (Raffaella) Cerullo, from childhood to old age as they struggle to figure out what they want/need to be/become by challenging the dominant gender roles and power relations embedded in the society. Within the framework of Gillian Rose and Doreen Massey’s theoretical conceptualizations regarding space, this article aims to discuss appropriation of urban space from a gendered perspective as presented through the Neapolitan Novels and in Ferrante’s Naples. Ferrante’s Neapolitan novels not only portray the personal transformation of the main characters Lenú and Lila, but also, their practices of urban appropriation, their relationship with the neighbourhood they live in along with the transformation of Naples as a socially constructed space itself.
description: Writingplace, No. 6 (2022): Meaningfulness, Appropriation and Integration of/in City Narratives
Historische Pragmatik und historische Varietätenlinguistik in den romanischen Sprachen
Creators: name: (:Unkn) Unknown
Publisher: name: Universität Kassel
Year: 2005
Subjects: subject: 440
subject: Romanische Sprachen
subject: Variationslinguistik
subject: Historische Pragmatik

description: Die Beiträge gehen aus der Sektion "Historische Pragmatik und Varietätenlinguistik. Wissenschaftspraxis und Methodologie - Divergenzen und Konvergenzen" hervor, die am 29. und 30. September 2003 auf dem XXVIII. Deutschen Romanistentag in Kiel stattfand. CC-BY-ND 2.0
description: Dieser Band wurde ermöglicht durch die freundliche Förderung der Kurt-Ringger-Stiftung (Akademie der Wissenschaften und der Literatur zu Mainz)
Advanced Analyses of Loss Mechanisms for PV Systems in Delhi, India
Creators: name: Nobre, A.M.
name: Dave, D.
name: Khor, A.
name: Malhotra, R.
name: Karthik, S.
name: Peters, I.M.
name: Reindl, T.
Publisher: name: WIP
Year: 2016
Subjects: Operation, Performance, Reliability and Sustainability of Photovoltaics
Operation of PV Systems

description: 32nd European Photovoltaic Solar Energy Conference and Exhibition; 1673-1677
description: Although the vast majority of systems in India are still deployed in multi-MW scale in solar farms,
cities like New Delhi have also seen a surge in industrial rooftop PV facilities, especially in the suburbs and the
greater surroundings of the city center (within a 100 km radius). Due to its massive population and the combination
of millions of vehicles and many heavy-industry zones, it is only natural that air pollution exists. The smog gets
further accentuated by agriculture fires at certain portions of the year. This work aims at investigating two loss
mechanisms that prevent PV systems in the Delhi area from achieving their maximum power output potential: soiling
due to dust accumulation on the modules’ surfaces; and air pollution (i.e. blockage of irradiation from reaching the
surface of PV systems), a much less investigated parameter in PV system technology research. In this work, we found
that soiling accumulation rates for Delhi can lead to losses between 0.3% and 0.6% per day. Air pollution related
blockage could represent yield losses of ~6% on an annual basis. Such information is crucial for PV system owners
and developers alike when evaluating PV asset deployments in Delhi, as well as maintaining these.
The Belly of Naples and Displaced Meanings, City-as-Body and City-as-Theatre in Commentaries on the Old Town Risanamento
Creators: name: Resta, Giuseppe
Publisher: name: Writingplace
Year: 2022

description: This article considers the formation of stereotypical images associated with the picturesque of the South, analysing the case of Naples. The text examines selected urban images reported before and after the late-nineteenth-century Risanamento period of dramatic renovations of the old town, with a focus on city-as-body and city-as-theatre tropes. The inevitable departure is Il Ventre di Napoli (1884-1906, The belly of Naples) by Matilde Serao. We will see how Serao tackles all contradictions of a built environment teeming with life. We have then connected excerpts from foreign travellers, again before and after the Risanamento, to the pleasures (or sickness) of flesh and theatricality. These displaced meanings parallel many descriptions by writers that travelled to Naples: Charles Dickens and the pantomime, Jean-Paul Sartre’s delirium of flesh and rotten food, Benjamin and the city-
description: Writingplace, No. 6 (2022): Meaningfulness, Appropriation and Integration of/in City Narratives
Exploring high-mass diphoton resonance without new colored states
Creators: name: Ahriche, Amine
name: Faisel, Gaber
name: Nasri, Salah
name: Tandean, Jusak
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: A new heavy resonance may be observable at the LHC if it has a significant decay branching fraction into a pair of photons. We entertain this possibility by looking at the modest excess in the diphoton invariant mass spectrum around 750 GeV recently reported in the ATLAS and CMS experiments. Assuming that it is a spinless boson, dubbed $\tilde s$, we consider it within a model containing two weak scalar doublets having zero vacuum expectation values and a scalar singlet in addition to the doublet responsible for breaking the electroweak symmetry. The model also possesses three Dirac neutral singlet fermions, the lightest one of which can play the role of dark matter and which participate with the new doublet scalars in generating light neutrino masses radiatively. We show that the model is consistent with all phenomenological constraints and can yield a production cross section $σ(pp\rightarrow\tilde{s}\rightarrowγγ)$ of roughly the desired size, mainly via the photon-fusion contribution, without involving extra colored fermions or bosons. We also discuss other major decay modes of $\tilde s$ which are potentially testable in upcoming LHC measurements.
description: 29 pages, 6 figures, retitled, expanded to address dark matter & neutrino mass, matches journal version
Narrative Deserts and Embodied Meanings in the City
Creators: name: Pint, Kris
Publisher: name: Writingplace
Year: 2022

description: In his famous analysis of everyday life, Michel de Certeau examines how the technocratic discourse of production and consumption deprives urban inhabitants of meaningful stories. At the same time, he discerns a proliferation of microstories that resist this homogenization. We want to argue that de Certeau’s work is still very relevant for a discussion about meaningfulness and the contemporary city, if we take into account that these stories can also be antagonistic and even destructive. Following the work of Mark Johnson, we also would like to regard meaning as something that is not only linguistic, but emerges from an affective, sensorial interaction with our built environment. As a case study, we will discuss Ghent’s City Pavilion, designed by Robbrecht & Daem and Marie-José Van Hee architects, as a generator of stories and embodied meanings, both positive and negative.
description: Writingplace, No. 6 (2022): Meaningfulness, Appropriation and Integration of/in City Narratives
Regeneration of Potential Induced Degradation Affected Modules
Creators: name: Hinz, C.
name: Koch, S.
name: Weber, T.
name: Berghold, J.
Publisher: name: WIP
Year: 2016
Subjects: Operation, Performance, Reliability and Sustainability of Photovoltaics
PV Cells and Modules

description: 32nd European Photovoltaic Solar Energy Conference and Exhibition; 1552-1557
description: There are certain regeneration methods to recover photovoltaic modules which are affected with
potential-induced degradation (PID) in a PV-plant. The aim of these investigations is to compare the effectiveness of
the solutions of two well-established providers with the concept of grounding as well as a high voltage power supply,
which will serve as a Reference. The focus will be on the degree of regeneration of the module power output at STC
(Standard Test Conditions) and weak light conditions as well as the influence of the modules degradation history on
the recovery-potential. The experiment was conducted with 40 PID-affected modules. As expected, the applied anti-
PID-devices induced a regeneration of the analyzed modules within the 70 days of the test period. Despite different
functional principles, the application of the two anti-PID-devices as well as the Reference design led unexpectedly to
very similar test-results. The worst recovery results were achieved with the grounding configuration. Within the
observation period of 70 days between 20% and 33% of the modules achieve the power warranty threshold for PID
recovery with the investigated devices and the reference. In case of solid grounding 0% could reach the power
warranty threshold of the module manufacturer (at STC) within the observation period. In general, very severely
degraded modules achieved a low degree of regeneration. Additionally, the weak light performance (at < 400 W/m²)
of the modules after recovery was still significantly reduced for all four methods tested.
Gauge invariant gluon spin operator for spinless non-linear wave solutions
Creators: name: Lee, Bum-Hoon
name: Kim, Youngman
name: Pak, D. G.
name: Tsukioka, Takuya
name: Zhang, P. M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider non-linear wave type solutions with mass scale parameter and vahished canonical spin density operator in a pure SU(2) quantum chtomodynamics (QCD). A new stationary solution which can be treated as a system of static Wu-Yang monopole dressed in off-diagonal gluon field is proposed. A remarkable feature of such a solution is that it possesses a finite energy density everywhere. All considered non-linear wave type solutions have common features: presence of a mass scale parameter, non-vanishing projection of the color magnetic field along the propagation direction and zero spin density. The last property requires revision of the gauge invariant definition of the spin density operator which supposed to be massless vector field in the classical theory. We construct a gauge invariant definition of the classical gluon spin density which is unique and Lorentz frame independent.
description: 12 pages, 5 figures, extended version, analysis of stability of the monopole solution is added
A Walk to the Cherwell River Meadows
Creators: name: De Wit, Saskia
Publisher: name: Writingplace
Year: 2022

description: In order to generate insights on the role of perceivable form, this article presents an excursion to Oxford, a mid-size European city with a strong urban identity. By weaving the landscape of the non-traditional architectural ensemble of St Catherine’s College into that of the traditional urban landscape, this paper aims to unfold (the perception of) the physical landscape, beyond the polemics of architectural style, as a generator of meaningfulness. Devoid of the style characteristics that determine our mental image of Oxford but remaining loyal to the programmatic and compositional logic of the Oxford colleges, the ensemble exposes just how much the quality of the physical landscape can affect
description: Writingplace, No. 6 (2022): Meaningfulness, Appropriation and Integration of/in City Narratives
Gefühlspolitische Selbst-Bildung. Zum kritischen Umgang mit politischen Gefühlen.
Creators: name: Metje, Frederik
Publisher: name: Universität Kassel
Year: 2023
Subjects: subject: Bildungsforschung
subject: Politikwissenschaft
subject: Philosophie
subject: Politische Bildung
subject: Politische Theorie
subject: Politische Philosophie
subject: Gefühl
subject: Affekt
subject: Selbst-Bildung
subject: Kritik
subject: Ethik
subject: Politische Ideologien
subject: Self Education
subject: Politics
subject: Critique
subject: Emotion
subject: Affect
subject: Civic Education
subject: Political Theory
subject: Political Feelings
subject: Education
subject: Ethics
subject: Political Ideologies
subject: Political Philosophy
subject: Theory of Education
subject: Political Science
subject: FOS: Political science
subject: 320
subject: Kritik
subject: Politische Bildung
subject: Gefühl

description: Zugleich: Dissertation, Universität Kassel, 2022. Diese Publikation wurde unter dem Titel »Gefühlspolitische Selbst-Bildung. Untersuchungen zwischen Kritik und Gefühl« als Dissertationsschrift am Fachbereich 05 Gesellschaftswissenschaften der Universität Kassel eingereicht und angenommen.
description: Gefördert durch den Publikationsfonds der Universität Kassel. Die Veröffentlichung dieser Publikation wird durch die Hans-Böckler-Stiftung gefördert.
Conformal Bootstrap in Embedding Space
Creators: name: Fortin, Jean-François
name: Skiba, Witold
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: It is shown how to obtain conformal blocks from embedding space with the help of the operator product expansion. The minimal conformal block originates from scalar exchange in a four-point correlation functions of four scalars. All remaining conformal blocks are simple derivatives of the minimal conformal block. With the help of the orthogonality properties of the conformal blocks, the analytic conformal bootstrap can be implemented directly in embedding space, leading to a Jacobi-like definition of conformal field theories.
description: 11 pages, added references
Narratives of Appropriation
Creators: name: Milián Bernal, Dalia
Publisher: name: Writingplace
Year: 2022

description: Based on a narrative inquiry, this article presents the stories of four women who are, individually and collectively, appropriating vacant and abandoned urban spaces, physically transforming them, providing them with new uses, while unleashing other processes that have the potential to lead to profound systemic transformations. Building on these stories, the article discusses the notion of appropriation, utilizing Henri Lefebvre’s writings. The key argument of the article is that, through the appropriation of these urban spaces, these women are asserting their right to the city and their right to challenge and participate in the processes of urbanization.
description: Writingplace, No. 6 (2022): Meaningfulness, Appropriation and Integration of/in City Narratives
Interaction between giant atoms in a one-dimensional structured environment
Creators: name: Soro, Ariadna
name: Muñoz, Carlos Sánchez
name: Kockum, Anton Frisk
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Giant atoms -- quantum emitters that couple to light at multiple discrete points -- are emerging as a new paradigm in quantum optics thanks to their many promising properties, such as decoherence-free interaction. While most previous work has considered giant atoms coupled to open continuous waveguides or a single giant atom coupled to a structured bath, here we study the interaction between two giant atoms mediated by a structured waveguide, e.g., a photonic crystal waveguide. This environment is characterized by a finite energy band and a band gap, which affect atomic dynamics beyond the Markovian regime. Here we show that, inside the band, decoherence-free interaction is possible for different atom-cavity detunings, but is degraded from the continuous-waveguide case by time delay and other non-Markovian effects. Outside the band, where atoms interact through the overlap of bound states, we find that giant atoms can interact more strongly and over longer distances than small atoms for some parameters -- for instance, when restricting the maximum coupling strength achievable per coupling point. The results presented here may find applications in quantum simulation and quantum gate implementation.
description: 15 pages, 10 figures
Entanglement Universality of TGX States in Qubit-Qutrit Systems
Creators: name: Hedemann, Samuel R.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We prove that all states (mixed or pure) of qubit-qutrit ($2\times 3$) systems have entanglement-preserving unitary (EPU) equivalence to a compact subset of true-generalized X (TGX) states called EPU-minimal TGX states which we give explicitly. Thus, for any spectrum-entanglement combination achievable by general states, there exists an EPU-minimal TGX state of the same spectrum and entanglement. We use I-concurrence to measure entanglement and give an explicit formula for it for all $2\times 3$ minimal TGX states (a more general set than EPU-minimal TGX states) whether mixed or pure, yielding its minimum average value over all decompositions. We also give a computable I-concurrence formula for a more general family called minimal super-generalized X (SGX) states, and give optimal decompositions for minimal SGX states and all of their subsets.
description: 23 pages, 4 figures, 5 appendices
The more investigation of inflation and reheating stages based on the Planck and WMAP-9
Creators: name: Ghayour, B.
Publisher: name: arXiv
Year: 2015
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The potential $V(ϕ)=λϕ^{n}$ is responsible for the inflation of the universe as scalar field $ϕ$ oscillates quickly around some point where $V(ϕ)$ has a minimum. The end of this stage has an important role on the further evolution stages of the universe. The created particles are responsible for reheating the universe at the end of this stage. The behaviour of the inflation and reheating stages are often known as power law expansion $S(η) \varpropto η^{1+β}$, $S(η) \varpropto η^{1+β_{s}}$ respectively. The reheating temperature ($T_{rh}$) and $β_{s}$ give us valuable information about the reheating stage. Recently people have studied about the behaviour of $T_{rh}$ based on slow-roll inflation and initial condition of quantum normalization. It is shown that there is some discrepancy on $T_{rh}$ due to amount of $β_{s}$ under the condition of slow-roll inflation and quantum normalization \cite{acq}. Therefore the author is believed in \cite{acq} that the quantum normalization may not be a good initial condition. But it seems that we can remove this discrepancy by determining the appropriate parameter $β_{s}$ and hence the obtained temperatures based on the calculated $β_{s}$ are in favour of both mentioned conditions. Then from given $β_{s}$, we can calculate $T_{rh}$, tensor to scalar ratio $r$ and parameters $β, n$ based on the Planck and WMAP-9 data. The observed results of $r, β_{s}, β$ and $n$ have consistency with their constrains. Also the results of $T_{rh}$ are in agreement with its general range and special range based on the DECIGO and BBO detectors.
description: Accepted by international journal of modern physics D, December 2016, including 15 pages, 2 figures with 11 panels
Performance Analysis of PV Green Roof Systems
Creators: name: Baumann, T.
name: Schär, D.
name: Carigiet, F.
name: Dreisiebner, A.
name: Baumgartner, F.
Publisher: name: WIP
Year: 2016
Subjects: Operation, Performance, Reliability and Sustainability of Photovoltaics
Operation of PV Systems

description: 32nd European Photovoltaic Solar Energy Conference and Exhibition; 1618-1622
description: The common assumption is that plants underneath PV modules will cause a cooling effect resulting in a
higher energy yield due to the negative temperature coefficient of PV power. The PV module temperature is
measured to verify this thesis on a flat roof PV plant in Winterthur, Switzerland. Thirteen different mounting test
field types with two different mechanical PV mounting systems are used, 20° or 15° tilted angles. Each type of
mechanical mounting system is combined with planting beneath and with and without irrigation in the different test
fields. The difference of the module temperatures, weighted according to the energy production, of all 13 analysed
test fields is between ± 1.8 °C. This temperature difference results in a calculated energy yield difference of about
± 0.7 % for the used crystalline silicon modules. This value is in the range of the measurement uncertainty of the
power measurement (± 1.2 %). Therefore the green roof has only negligible influence on the temperature reduction of
the PV modules on the base of the used system components. However, a combination of PV and green roof is
absolutely doable and recommendable provided that the mounting system is optimized for green roofs. Other more
powerful benefits of such combination of green roofs and PV are the improvement of water retention in the city.
How to Speak?
Creators: name: Pérez-Gómez, Alberto
name: Niculae, Lorin
name: Mejia Hernandez, Jorge
name: Havik, Klaske
Publisher: name: Writingplace
Year: 2021

description: Elaborating on a host of historical and theoretical references, in this conversation Alberto Pérez-Gómez suggests a course of action for the development of the architectural discipline; opposing the banality of scientism and rationalism, and recognizing instead the need for a degree of obscurity and ambiguity as essential to the full exercise of our humanity in relation to what we build and inhabit. Metaphors, myths, stories and poems, he notes, are not only useful instruments to represent architecture’s aesthetics and purpose, but elemental human practices that define who we are and how we know. Tense between different polarities, the conversation explores architecture as a way to find sense and meaning by relying on timeless wisdom in the face of the many distractions and distortions that characterize our time.
description: Writingplace, No. 5 (2021): Narrative Methods for Writing Urban Places
Continual Prune-and-Select: Class-incremental learning with specialized subnetworks
Creators: name: Dekhovich, Aleksandr
name: Tax, David M. J.
name: Sluiter, Marcel H. F.
name: Bessa, Miguel A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: The human brain is capable of learning tasks sequentially mostly without forgetting. However, deep neural networks (DNNs) suffer from catastrophic forgetting when learning one task after another. We address this challenge considering a class-incremental learning scenario where the DNN sees test data without knowing the task from which this data originates. During training, Continual-Prune-and-Select (CP&S) finds a subnetwork within the DNN that is responsible for solving a given task. Then, during inference, CP&S selects the correct subnetwork to make predictions for that task. A new task is learned by training available neuronal connections of the DNN (previously untrained) to create a new subnetwork by pruning, which can include previously trained connections belonging to other subnetwork(s) because it does not update shared connections. This enables to eliminate catastrophic forgetting by creating specialized regions in the DNN that do not conflict with each other while still allowing knowledge transfer across them. The CP&S strategy is implemented with different subnetwork selection strategies, revealing superior performance to state-of-the-art continual learning methods tested on various datasets (CIFAR-100, CUB-200-2011, ImageNet-100 and ImageNet-1000). In particular, CP&S is capable of sequentially learning 10 tasks from ImageNet-1000 keeping an accuracy around 94% with negligible forgetting, a first-of-its-kind result in class-incremental learning. To the best of the authors' knowledge, this represents an improvement in accuracy above 10% when compared to the best alternative method.
Unknowing through Writing-(and)-Drawing
Creators: name: Bogdanova, Viktorija
Publisher: name: Writingplace
Year: 2021

description: In this article, unknowing is the human condition when a person experiences an intense dissolving into the environment. Analytical modes of thinking and rational and deductive modes of getting to conclusions and have their own meaning and importance. However, emotional and intuitive awareness and the imaginative empathy, have their own way of revealing meaning embedded in a specific place. In this article, I will reflect on three examples that illustrate how writing and drawing may bring about a different reading of places, architectural typologies and architectural symbols – when filled with fictional stories and speculative narratives: Yuri Nornstein’s Hedgehog in the Fog, Dostoyevsky’s Crystal Palace in the Notes of the Underground, and Brodsky and Utkin’s project of the Crystal Palace. Along these examples, the article discusses writing and drawing methods that stimulate a creative disjunction from habitual research in architectural and urban thinking through three forms of unknowing: ascending, denying, deconstructing.
description: Writingplace, No. 5 (2021): Narrative Methods for Writing Urban Places
Direct Evidence for Hot-Cell-Induced Modifications in PV Module Encapsulants
Creators: name: Camus, C.
name: Buerhop-Lutz, C.
name: Wrana, S.
name: Adams, J.
name: Pickel, T.
name: Scheuerpflug, H.
name: Zetzmann, C.
name: Malguth, E.
name: Hauch, J.
name: Brabec, C.J.
Publisher: name: WIP
Year: 2016
Subjects: Operation, Performance, Reliability and Sustainability of Photovoltaics
PV Cells and Modules

description: 32nd European Photovoltaic Solar Energy Conference and Exhibition; 1548-1551
description: In this paper, the influence of the heat dissipated by a broken cell in a photovoltaic module on the
encapsulation properties is investigated. Therefore, a combined study based on drone-based infrared thermography,
electroluminescence and indentation tests of the mechanical properties of the encapsulant is presented. For the first
time, direct evidence is given that the viscoelastic properties of the encapsulant are shifted towards increased stiffness
and brittleness by the long-term presence of hot cells. Therefore, the dissipated heat may lead to a local damage of the
encapsulant on the long-term, which in turn may trigger the degradation of the module due to insufficient
encapsulation.
Hopper flows of deformable particles
Creators: name: Cheng, Y.
name: Treado, J. D.
name: Lonial, B.
name: Habdas, P.
name: Weeks, E. R.
name: Shattuck, M. D.
name: O'Hern, C. S.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Numerous experimental and computational studies show that continuous hopper flows of granular materials obey the Beverloo equation that relates the volume flow rate $Q$ and the orifice width $w$: $Q \sim (w/σ_{\rm avg}-k)^β$, where $σ_{\rm avg}$ is the average particle diameter, $kσ_{\rm avg}$ is an offset where $Q\sim 0$, the power-law scaling exponent $β=d-1/2$, and $d$ is the spatial dimension. Recent studies of hopper flows of deformable particles in different background fluids suggest that the particle stiffness and dissipation mechanism can also strongly affect the power-law scaling exponent $β$. We carry out computational studies of hopper flows of deformable particles with both kinetic friction and background fluid dissipation in two and three dimensions. We show that the exponent $β$ varies continuously with the ratio of the viscous drag to the kinetic friction coefficient, $λ=ζ/μ$. $β= d-1/2$ in the $λ\rightarrow 0$ limit and $d-3/2$ in the $λ\rightarrow \infty$ limit, with a midpoint $λ_c$ that depends on the hopper opening angle $θ_w$. We also characterize the spatial structure of the flows and associate changes in spatial structure of the hopper flows to changes in the exponent $β$. The offset $k$ increases with particle stiffness until $k \sim k_{\rm max}$ in the hard-particle limit, where $k_{\rm max} \sim 3.5$ is larger for $λ\rightarrow \infty$ compared to that for $λ\rightarrow 0$. Finally, we show that the simulations of hopper flows of deformable particles in the $λ\rightarrow \infty$ limit recapitulate the experimental results for quasi-2D hopper flows of oil droplets in water.
description: 15 pages, 12 figures
The Paris of L’Ivre De Pierres, Narrative Architecture between Words and Drawing
Creators: name: Machado E Moura, Carlos
name: Lus Arana, Luis Miguel
Publisher: name: Writingplace
Year: 2021

description: An editorial experiment pursued by Jean-Paul Jungmann between 1977 and 1983, L’Ivre de Pierres provides a series of imaginary visions, mostly of an imaginary Paris, conceived through architectural narrations that were articulated in the pages of a book. This article examines L’Ivre de Pierres’ unconventional approach to figurative writing, as an example of the possibilities of exploring architecture through narrative means, constructing urban narratives through architectural design, and developing architectural criticism through both. L’Ivre de Pierres did not renounce the project in favour of discourse, but employed architectural devices to elaborate a ‘concrete utopia’ instead: one made of potentially realizable projects which, however, were conceived to exist only as (real) fictions in the pages of a book. Firmly rooted in Jungmann’s previous experience with the magazine Utopie, with which it somehow plays a game of mirrors, L’Ivre de Pierres is also linked to the tradition of paper architecture that historically used fiction to produce architectural discourses, criticism, or to think architectural designs. This article researches on the narrative methods and modes – it examines the iconography, the book format, the content and types of texts – used in L’Ivre de Pierres as an example of the potential that these both visual and textual alternative realities have for the reading, thinking and writing of urban places.
description: Writingplace, No. 5 (2021): Narrative Methods for Writing Urban Places
Theoretical prediction of magnetic and noncentrosymmetric Weyl fermion semimetal states in the R-Al-X family of compounds (R=rare earth, Al=aluminium, X=Si, Ge)
Creators: name: Chang, Guoqing
name: Singh, Bahadur
name: Xu, Su-Yang
name: Bian, Guang
name: Huang, Shin-Ming
name: Hsu, Chuang-Han
name: Belopolski, Ilya
name: Alidoust, Nasser
name: Sanchez, Daniel S.
name: Zheng, Hao
name: Lu, Hong
name: Zhang, Xiao
name: Bian, Yi
name: Chang, Tay-Rong
name: Jeng, Horng-Tay
name: Bansil, Arun
name: Hsu, Han
name: Jia, Shuang
name: Neupert, Titus
name: Lin, Hsin
name: Hasan, M. Zahid
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Weyl semimetals are novel topological conductors that host Weyl fermions as emergent quasiparticles. While the Weyl fermions in high-energy physics are strictly defined as the massless solution of the Dirac equation and uniquely fixed by Lorentz symmetry, there is no such constraint for a topological metal in general. Specifically, the Weyl quasiparticles can arise by breaking either the space-inversion ($\mathcal{I}$) or time-reversal ($\mathcal{T}$) symmetry. They can either respect Lorentz symmetry (type-I) or strongly violate it (type-II). To date, different types of Weyl fermions have been predicted to occur only in different classes of materials. In this paper, we present a significant materials breakthrough by identifying a large class of Weyl materials in the RAlX (R=Rare earth, Al, X=Ge, Si) family that can realize all different types of emergent Weyl fermions ($\mathcal{I}$-breaking, $\mathcal{T}$-breaking, type-I or type-II), depending on a suitable choice of the rare earth elements. Specifically, RAlX can be ferromagnetic, nonmagnetic or antiferromagnetic and the electronic band topology and topological nature of the Weyl fermions can be tuned. The unparalleled tunability and the large number of compounds make the RAlX family of compounds a unique Weyl semimetal class for exploring the wide-ranging topological phenomena associated with different types of emergent Weyl fermions in transport, spectroscopic and device-based experiments.
description: This paper reports theoretical prediction of Weyl semimetal (type-I and type-II) states in the R-Al-X family. For the experimental discovery, see our earlier paper at http://arxiv.org/abs/1603.07318