cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Rhythms and wave propagation in the heart
Creators: name: Zemlin, Christian
Publisher: name: Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I
Year: 2002
Subjects: subject: Herzrhythmusstörungen
subject: Herz
subject: Modell
subject: Erregung
subject: heart
subject: arrhythmia
subject: excitation
subject: model
subject: 530 Physik
subject: 29 Physik, Astronomie
subject: YB 8000

description: In der vorliegenden Arbeit untersuchen wir verschiedene Aspekte von Herzrhythmen, von einzelnen Zellen bis zu den gesamten menschlichen Vorhöfen. Das Hauptprojekt ist die Entwicklung eines realistischen und effizienten Modells für die Erregungsausbreitung in den menschlichen Vorhöfen. Im ersten Kapitel untersuchen wir stimulierte Herzellen und den Verlust vom 1:1-Rhythmus für steigende Frequenzen. Weiter untersuchen wir Wellenausbreitung in Gewebe mit besonderen elektrophysiologischen Eigenschaften, die mit chronischen Erkrankungen der Vorhöfe in Verbindung stehen. Dann wenden wir uns Ionenmodellen zu, die ein zentraler Teil des Vorhofmodells sind. Wir untersuchen die Auswirkungen einer Verletzung der Ladungserhaltung, die in allen Ionenmodellen vorliegt, die die Konzentrationen der Ionen als Variablen enthalten, und erklären, warum diese Auswirkungen meist vernachlässigbar sind. Wir entwickeln weiter eine Methode, Ionenmodelle zu vereinfachen und dabei ihre für die Wellenausbreitung wichtigen Eigenschaften nur minimal zu verändern. Diese Methode wenden wir auf ein realistisches Ionenmodell für menschliches Vorhofgewebe an und kombinieren es mit anatomischen Daten, um das gewünschte realistische Vorhofmodell zu erhalten. Schließlich benutzen wir dieses Modell, um mögliche Mechanismen der Enstehung von Herzrhythmusstörungen zu untersuchen.
description: In this thesis, we study heart rhythms at different levels, from single cells to the entire human atria. The main project of this thesis is the development of a realistic and efficient model of wave propagation in the human atria. We start by studying paced single cells and their loss of 1:1 rhythmicity for increasing frequency. We go on to study wave propagation in tissue with special electrophysiologic properties, related to chronical disease of the atria. Then we treat ionic models, which are a central part of our atrial model. We discuss a recently discovered mathematical degeneracy present in all models of cardiac cells that include intracellular ion concentrations and we explain why this degeneracy has only a negligible effect on wave propagation. We develop a method to reduce the complexity of ionic models while closely retaining their wave propagation properties. Then we apply this method to a realistic ionic model of the human atria and combine it with anatomical data to get the desired model. We use this model to explore possible mechanisms for the genesis of arrhythmias.
From Epiphylogenesis to General Organology
Creators: name: Gorny, Robert Alexander
name: Radman, Andrej
Publisher: name: FOOTPRINT
Year: 2022

description: Epiphylogenesis is a neologism coined under Stiegler’s anthropotechnical theorisation of the co-evolution of brains and tools. In line with feminist and decolonial theorists like Claire Colebrook and Kathryn Yusoff, it foregrounds that there has never been such a thing as ‘the human’. There are only differentiation processes that historically make humans who they are, and do so in different ways. As such, it has gained some currency in a stream of neo-materialist theories that have revisited anthropogenesis, or the quasi-causality of becoming human, that operates by way of progressively differentiating environments and technics. In addition to primary memory as the genetic information expressed in DNA and secondary memory acquired epigenetically through a complex nervous system, there is also tertiary memory, which Stiegler named ‘epiphylogenetic’. It is the accumulation and retention of historical epigenetic differentiations within the spatio-temporal organisation of material environments. Specifically, the formation of organisational technics includes writing, art, clothing, tools, and machines, but also architecture and urban planning. This outsourcing of memory from the organic changes the conditions for further phylogenetic becomings, given that evolutions continue to be extrinsically organised (‘ex-organised’) by associated technicised milieus.
description: FOOTPRINT, Vol. 16 No. 1 (2022): Issue # 30 | Spring/ Summer 2022 |The Epiphylogenetic Turn and Architecture: In (Tertiary) Memory of Bernard Stiegler
Pilot Line Results of n-Type IBC Cell Process in Mass Production Environment
Creators: name: Guillevin, N.
name: Cesar, I.
name: Burgers, A.R.
name: Venema, P.
name: Wang, Z.
name: Zhai, J.Y.
name: Liu, D.
Publisher: name: WIP
Year: 2017
Subjects: Silicon Photovoltaics
Manufacturing & Production

description: 33rd European Photovoltaic Solar Energy Conference and Exhibition; 205-211
description: Together with Yingli Solar and Tempress Systems, ECN accelerates the development of the Mercury IBC
technology by implementing its low-cost cell process in a mass production environment. The Mercury solar cell
concept based on a bifacial IBC cell design with a front floating emitter (FFE) can now be fully processed on
Yingli’s pilot line. Pilot processing in an industrial environment offers a great opportunity for the Mercury
technology to gain in maturity through an effective bottom-up approach. With a cell process using similar
specifications as the commercial n-PERT process, the implementation of the Mercury IBC technology went fast
reaching cell efficiencies close to 21% in less than a year. The FFE which renders the cell resilient to electrical
shading and reduces the demands on feature size, allowing a high tolerance cell processing. This key feature of
the Mercury cell concept plays a major role when it comes to high throughput industrial manufacturing up to
module level. Before the end of the year, a set of optimisations will be applied to the rear-side diffusion pattern
and to the metallisation with the objective the reach cell efficiencies of 22%. Manufacturability aspects, lab
performance and the results of piloting the IBC Mercury technology are described in this paper. Further
efficiency gain towards 24% based on the use of polysilicon is also discussed in this paper.
Dippers and Dusty Disks Edges: A Unified Model
Creators: name: Bodman, Eva H. L.
name: Quillen, Alice C.
name: Ansdell, Megan
name: Hippke, Michael
name: Boyajian, Tabetha S.
name: Mamajek, Eric E.
name: Blackman, Eric G.
name: Rizzuto, Aaron
name: Kastner, Joel H.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We revisit the nature of large dips in flux from extinction by dusty circumstellar material that is observed by Kepler for many young stars in the Upper Sco and $ρ$ Oph star formation regions. These young, low-mass "dipper" stars are known to have low accretion rates and primarily host moderately evolved dusty circumstellar disks. Young low mass stars often exhibit rotating star spots that cause quasi-periodic photometric variations. We found no evidence for periods associated with the dips that are different from the star spot rotation period in spectrograms constructed from the light curves. The material causing the dips in most of these light curves must be approximately corotating with the star. We find that disk temperatures computed at the disk corotation radius are cool enough that dust should not sublime. Crude estimates for stellar magnetic field strengths and accretion rates are consistent with magnetospheric truncation near the corotation radius. Magnetospheric truncation models can explain why the dips are associated with material near corotation and how dusty material is lifted out of the midplane to obscure the star which would account for the large fraction of young low mass stars that are dippers. We propose that variations in disk orientation angle, stellar magnetic field dipole tilt axis, and disk accretion rate are underlying parameters accounting for differences in the dipper light curves.
description: submitted to MNRAS, updated for referee revisions
Long-term memory and synapse-like dynamics in two-dimensional nanofluidic channels
Creators: name: Robin, P.
name: Emmerich, T.
name: Ismail, A.
name: Niguès, A.
name: You, Y.
name: Nam, G. -H.
name: Keerthi, A.
name: Siria, A.
name: Geim, A. K.
name: Radha, B.
name: Bocquet, L.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Fine-tuned ion transport across nanoscale pores is key to many biological processes such as neurotransmission. Recent advances have enabled the confinement of water and ions to two dimensions, unveiling transport properties unreachable at larger scales and triggering hopes to reproduce the ionic machinery of biological systems. Here we report experiments demonstrating the emergence of memory in the transport of aqueous electrolytes across (sub)nanoscale channels. We unveiled two types of nanofluidic memristors, depending on channel material and confinement, with memory from minutes to hours. We explained how large timescales could emerge from interfacial processes like ionic self-assembly or surface adsorption. Such behavior allowed us to implement Hebbian learning with nanofluidic systems. This result lays the ground for biomimetic computations on aqueous electrolytic chips.
Queer Life(lines) Within the Death of an Archive
Creators: name: Noorani, Setareh
Publisher: name: FOOTPRINT
Year: 2022

description: In this essay turned collective text-archive, I explore, through proliferating Stieglers thought, epigenetics as the genetic transfer of experience, seeing it as our inherited tools, codes, and processes that enable us to construct radical political alternatives. Similarly, the global West has inherited institutions and their systems – such as the archive – retaining specific perspectives founded on a Eurocentric epistemic model proximate to whiteness, masculinity, and heteronormativity, while obscuring or forgetting Other knowledges. A main question is: who and whose knowledge is in need to be constructed as indispensable, as present outside of the gap? What knowledge constructs whose subjectivity? Part of the confrontation exists of tracing the archive’s outside space, entangling with Other ways of doing that enable us to rethink institutions. This means then partially coming to terms which knowledge and bodies we need to survive collectively and in solidarity. And thus, what urgent, vibrant archives are we already passing on, beyond our own (knowledge) lifespan? This essay-text-archive makes visual the layered and multi-authored process of creating this knowledge resource. It intends to deconstruct and queer the position of the footnote, as archival trace and life’s whisper – with its curator-writer-editors as performing the essential care-work of mediating this archival effort.
description: FOOTPRINT, Vol. 16 No. 1 (2022): Issue # 30 | Spring/ Summer 2022 |The Epiphylogenetic Turn and Architecture: In (Tertiary) Memory of Bernard Stiegler
Hard and Transparent DLC Coating as a Protective Layer for Solar Cells
Creators: name: Dehbi-Alaoui, A.
name: Sequaq, B.
name: Obaidi, A.
name: Ibba, M.A.
Publisher: name: WIP
Year: 2017
Subjects: New Materials and Concepts for Photovoltaic Devices
New Materials and Concepts for Cells and Modules

description: 33rd European Photovoltaic Solar Energy Conference and Exhibition; 195-197
description: Solar cells are subject to sand wind, they need a hard and transparent layer on the front surface. Diamondlike
carbon films (DLC) coatings are known for their high hardness but they are not completely transparent in the visible. In this work we will show a method, using a Fast Atom Beam (FAB) source, in a special configuration that allowed us to deposit hard and transparent (clear) 100nm DLC films on glass substrates at room temperature and at pressure around 10-2 Pa. The coating is deposited from the reflected FAB beam from an Aluminum target which was not sputtered. The energy of the reflected FAB beam particles has been reduced due to collisions with the reflected particles from the substrates. Infrared spectroscopy showed that these films are not hydrogenated this is logical because only
Argon was used to sputter carbon from the internal FAB source graphite walls and were accelerated out of the FAB
source. Physical properties have been measured using different characterization techniques. The results showed that this
coating is a tetrahedral (ta-C) type of DLC film and can be used as a protective layer for photovoltaique solar cells.
title: Economics, Political Practices and Identities on the Nile
title: Convergence and Conflicts ca. 1800 to 1530 BC
titleType: Subtitle
Creators: name: Flammini, Roxana
Publisher: name: Freie Universität Berlin
Year: 2020
Subjects: subject: world-systems
subject: core
subject: periphery
subject: networks
subject: disruption
subject: pulsation
subject: 900 Geschichte und Geografie::930 Geschichte des Altertums (bis ca. 499), Archäologie::930 Geschichte des Altertums bis ca. 499, Archäologie

description: Political and economic networks which linked societies from the Levant to Nubia during the 2nd millennium BC were integrated as a world-system, fluctuating from a coreperiphery differentiation (ca. 2000 to 1800 BC) to a core-periphery hierarchy (ca. 1530 to 1200 BC) through a disruptive process which took place ca. 1800 to 1530 BC. This paper approaches this disruptive process, probably triggered by a legitimacy crisis in the core area. Disruption resulted in the emergence of a multiple independent cores; and also revealed local cultural features and practices. Despite the difficulties posed by the evidence, an attempt to analyse the relationships these political entities sustained is made.
Speculative Architecture
Creators: name: Colebrook, Claire Mary
Publisher: name: FOOTPRINT
Year: 2022

description: What is the problem of epiphylogenesis? We can define and understand the term, but what does it do and what does it demand of us? Indeed, one way of thinking about epiphylogenesis is through Bernard Stiegler’s claim that some forms of technology generate or enable long circuits of desire, and that this needs to be recalled in a time of short-circuits. Epiphylogenesis requires both that we pose problems differently, and that ‘we’ are, or should be, a problem to ourselves. Let me unpack this by beginning with what presents itself as a major problem: climate change, and the end of the world. What are we going to do? How can we change course? How do we save the world? The posing of the question in this way is only possible if there is a distinct ‘we’ who must then deliberate a course of action in relation to the world. Epiphylogenesis shifts the question towards the very possibility of this ‘we.’ How do formations of what comes to think of itself as ‘the human’ come into being, and what worlds and capacities do such formations make possible? For Stiegler the problem of climate change is ultimately the problem of who ‘we’ are, along with a constitutive tendency towards the failure to confront this question.
description: FOOTPRINT, Vol. 16 No. 1 (2022): Issue # 30 | Spring/ Summer 2022 |The Epiphylogenetic Turn and Architecture: In (Tertiary) Memory of Bernard Stiegler
Topological properties of Dirac and Weyl semimetals
Creators: name: Burkov, A. A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: This chapter describes topological (Dirac and Weyl) semimetals from the viewpoint of their observable electromagnetic response. We argue that this response may be represented by topological terms with unquantized (non-integer) coefficients and make a connection with the Luttinger's theorem, which relates the size of the Fermi surface of an ordinary metal to the number of electrons per unit cell. We discuss observable transport phenomena, associated with this topological response.
description: 7 pages, 5 figures; chapter for Encyclopedia of Condensed Matter Physics, 2nd edition (Elsevier)
Simondoniana
Creators: name: Kodalak, Gokhan
name: Kousoulas, Stavros
Publisher: name: FOOTPRINT
Year: 2022

description: Kodalak’s essay revisits Gilbert Simondon as a postwar philosopher, who formulated a new way of conceiving individual modalities—from crystals, technical objects and biological organisms to psychic phenomena and social collectives. Simondon’s metaphysical conception of ontogenesis—that explains how individuals emerge from a pre-individual field of metastable potentials through processes of individuation—helped him reconceive technical objects, no longer as passive automata, but as exuberant individuals, active and full of life, with irreducible modes of existence of their own. With this new vision, Simondon invites us to rethink our relationship with technical objects beyond the mythological attitudes of technocracy, technophilia, and technophobia, which can be further developed today for reconceiving architecture’s own technical modes of existence and charged relations with technology. Kousoulas’ essay begs the question: Why Simondon in a volume dedicated to Stiegler? It is not that Stiegler’s oeuvre cannot be examined without referring to the crucial influence that Simondon had for his thought. More important than this, it is only through Simondon that Stiegler makes sense. Simondon is keen to remind us that sense, first and foremost, stands for directionality: to make sense is to grasp a direction. Without Simondon’s critical reformulation of our technological becoming, Stiegler’s project remains null. In a non-zero-sum game, Stiegler through Simondon and (retroactively) Simondon through Stiegler, produce the norms and values of a directing sense that can indeed compel us to engage in our worldly endeavours with neganthropic care.
description: FOOTPRINT, Vol. 16 No. 1 (2022): Issue # 30 | Spring/ Summer 2022 |The Epiphylogenetic Turn and Architecture: In (Tertiary) Memory of Bernard Stiegler
Possibility of triple magic trapping of clock and Rydberg states of divalent atoms in optical lattices
Creators: name: Topcu, T.
name: Derevianko, A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We predict the possibility of "triply-magic" optical lattice trapping of neutral divalent atoms. In such a lattice, the ${^1}\!S_{0}$ and ${^3}\!P_{0}$ clock states and an additional Rydberg state experience identical optical potentials, fully mitigating detrimental effects of the motional decoherence. In particular, we show that this triply magic trapping condition can be satisfied for Yb atom at optical wavelengths and for various other divalent systems (Ca, Mg, Hg and Sr) in the UV region. We assess the quality of triple magic trapping conditions by estimating the probability of excitation out of the motional ground state as a result of the excitations between the clock and the Rydberg states. We also calculate trapping laser-induced photoionization rates of divalent Rydberg atoms at magic frequencies. We find that such rates are below the radiative spontaneous-emission rates, due to the presence of Cooper minima in photoionization cross-sections.
Advanced Manufacturing Configuration by Sample-efficient Batch Bayesian Optimization
Creators: name: Guidetti, Xavier
name: Rupenyan, Alisa
name: Fassl, Lutz
name: Nabavi, Majid
name: Lygeros, John
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: Systems and Control (eess.SY)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: We propose a framework for the configuration and operation of expensive-to-evaluate advanced manufacturing methods, based on Bayesian optimization. The framework unifies a tailored acquisition function, a parallel acquisition procedure, and the integration of process information providing context to the optimization procedure. \cmtb{The novel acquisition function is demonstrated, analyzed and compared on state-of-the-art benchmarking problems. We apply the optimization approach to atmospheric plasma spraying and fused deposition modeling.} Our results demonstrate that the proposed framework can efficiently find input parameters that produce the desired outcome and minimize the process cost.
description: Accepted for IEEE RA-L. 8 pages, 6 figures. arXiv admin note: text overlap with arXiv:2103.13881
Ars Demones *2022* Manifesto
Creators: name: Wołodźko, Agnieszka Anna
Publisher: name: FOOTPRINT
Year: 2022

description: Ars Daemones is a manifesto that responds, problematises and encounters conditions and implications of the practice of technologies of spirit as specified in the Ars Industrialis’ two manifesto written by B. Stiegler in 2005 and 2010. Most importantly, the present manifesto focuses on the question of possible conditions and material implications of practice that Stiegler framed within his word of mystagogy. Here, the mystagogy as a knowledge that escapes capture, that demands “contexts, milieus, practices, gestures, rituals, and technologies” is defined as demonology, following G. Deleuze, where both, mystagogy and demonology, call for condition of relationality, movement and an embodied experience. For Stiegler, the knowledge of mystagogy, because of its risky and excessive character, enables to learn and practice care, and it is through the work of art that we can experience of what degrees of care such an excess of another plane need. Through fables of three bodies as experienced through the work of three artists, Ars Daemones will braid material narratives of care. The selection of the three artists, is contaminated by each other by the common question of the risk of care looking for practices of knowledges that rather than survive, would enable to thrive. The manifesto is thus written through the experience of vegetariat present in the work of Špela Petrič, through transbodies and xenologies in space present in the work of Adriana Knouf and through the practice of virophilia in the work of Pei-Ying Lin. Ars Daemones fabulates while experiencing the practices of “I” that is already contaminated and contaminating.
description: FOOTPRINT, Vol. 16 No. 1 (2022): Issue # 30 | Spring/ Summer 2022 |The Epiphylogenetic Turn and Architecture: In (Tertiary) Memory of Bernard Stiegler
Investigation on the Ag-Al Metal Spiking into Boron-Diffused p+ Layer of Industrial Bifacial n-Type Silicon Wafer Solar Cells by Numerical Simulation
Creators: name: Li, M.
name: Ma, F.-J.
name: Stangl, R.
name: Aberle, A.G.
name: Samudra, G.S.
name: Hoex, B.
Publisher: name: WIP
Year: 2017
Subjects: Silicon Photovoltaics
Characterisation & Simulation Methods

description: 33rd European Photovoltaic Solar Energy Conference and Exhibition; 251-255
description: A small amount of Al is usually added to the Ag paste to facilitate a sufficiently low specific contact
resistance to contact boron diffused p+ silicon layers. However, Al can result in spiking from the metal contacts into
the diffused layer leading to a pronounced recombination at the metal-silicon interface. This significantly limits the
open-circuit voltages of screen printed n-type silicon solar cells. The aim of this work is to investigate the sensitivity
of industrially feasible boron diffusion doping profiles to various spike densities/shapes using Sentaurus TCAD device
simulation. Four different experimental BBr3 diffused doping profiles were analyzed. Bifacial n-type front and back
contacted (nFAB) silicon solar cells were simulated. It was found that the cell efficiency was only significantly affected
when the localized spikes penetrate as deep as that they contact to a doping density below ~ 1×10^18 cm-3. Beyond that
point, the defect-related recombination at the metal-Si interface starts to increase by orders of magnitude. The cell
efficiency could degrade by relatively ~ 2 - 3 % to up to ~ 10 % when the spike fraction increases from 5 - 10 % to 100
%.
Finsler geometry modeling and Monte Carlo study of 3D liquid crystal elastomer
Creators: name: Osari, Keita
name: Koibuchi, Hiroshi
Publisher: name: arXiv
Year: 2016
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study a three-dimensional ($3D$) liquid crystal elastomer (LCE) in the context of Finsler geometry (FG) modeling, where FG is a mathematical framework for describing anisotropic phenomena. The LCE is a $3D$ rubbery object and has remarkable properties, such as the so-called soft elasticity and elongation, the mechanisms of which are unknown at present. To understand these anisotropic phenomena, we introduce a variable $σ$, which represents the directional degrees of freedom of a liquid crystal (LC) molecule. This variable $σ$ is used to define the Finsler metric for the interaction between the LC molecules and bulk polymers. Performing Monte Carlo (MC) simulations for a cylindrical body between two parallel plates, we numerically find the soft elasticity in MC data such that the tensile stress and strain are consistent with reported experimental results. Moreover, the elongation is also observed in the results of MC simulations of a spherical body with free boundaries, and the data obtained from the MC simulations are also consistent with existing experimental results.
description: 33 pages, 12 figures
title: East Meets West
title: Aegean Identities and Interactions in the Late Bronze Age Mediterranean
titleType: Subtitle
Creators: name: Dawson, Helen
name: Nikolakopoulou, Irene
Publisher: name: Freie Universität Berlin
Year: 2020
Subjects: subject: core-periphery
subject: interaction
subject: connectivity
subject: Minoan
subject: Mycenaean
subject: Akrotiri
subject: Lipari
subject: 900 Geschichte und Geografie::930 Geschichte des Altertums (bis ca. 499), Archäologie::930 Geschichte des Altertums bis ca. 499, Archäologie

description: Interaction in Mediterranean protohistory is generally considered via the core-periphery model, with greater influence being ascribed to the complex polities of the eastern Mediterranean than to those of the Aegean and central Mediterranean. This is despite archaeological evidence attesting that they actively participated in material and cultural exchanges. In this paper, we focus on Minoan Crete and Mycenaean Greece, reflecting on their interaction spheres and on the meaning of ‘central’ and ‘peripheral’ places. We consider two case studies: Thera and the Aeolian Islands. These islands functioned as maritime hubs in both inter-regional and regional networks. We propose a model of ‘cycles of integration’, as a more accurate and less static representation of interaction.
Data driven gradient flows
Creators: name: Pietschmann, Jan-F.
name: Schlottbom, Matthias
Publisher: name: arXiv
Year: 2022
Subjects: subject: Numerical Analysis (math.NA)
subject: Analysis of PDEs (math.AP)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 49N45, 35R30, 49N45, 49Q22

description: We present a framework enabling variational data assimilation for gradient flows in general metric spaces, based on the minimizing movement (or Jordan-Kinderlehrer-Otto) approximation scheme. After discussing stability properties in the most general case, we specialise to the space of probability measures endowed with the Wasserstein distance. This setting covers many non-linear partial differential equations (PDEs), such as the porous medium equation or general drift-diffusion-aggregation equations, which can be treated by our methods independent of their respective properties (such as finite speed of propagation or blow-up). We then focus on the numerical implementation of our approach using an primal-dual algorithm. The strength of our approach lies in the fact that by simply changing the driving functional, a wide range of PDEs can be treated without the need to adopt the numerical scheme. We conclude by presenting detailed numerical examples.
Re-Imagining a 'We' Beyond the Gathering of Reductions
Creators: name: Athanasiadou, Lila
name: Klumbyte, Goda
name: Rouvroy, Antoinette
Publisher: name: FOOTPRINT
Year: 2022

description: In this article Lila Athanasiadou and Goda Klumbytė engage in a conversation with Antoinette Rouvroy to revisit Guattari’s "Three Ecologies" and discuss their dynamics in and for the digital age. While a lot of the discourses on algorithms and digital future invoke catastrophic imaginaries of totalizing control, this conversation works with a propositional format, teasing out affirmative politics by pointing to spaces of potentiality within the environmental, the social and the mental realm. Starting from the environmental ecology and thinking of data as a waste, Rouvroy discusses planetary exhaustion as the result of the depletion of natural resources, forced labour practices and the assumption that data hold the answers to the problems posed by global capital. Proposing a space for material experimentation, she speculates on the potential of emerging subjectivities that remain irreducible to data flows. Within social ecology, Rouvroy advocates for the urgency to center digital policy as the space in which the new forms of institutions emerge in order to reorient the power of computation towards the commons. Lastly, within the mental ecology, Rouvroy reconceptualizes the legal subject as a performance that operates within the proliferation of asignifying data signs, reimagining a “we” beyond the gathering of reductions.
description: FOOTPRINT, Vol. 16 No. 1 (2022): Issue # 30 | Spring/ Summer 2022 |The Epiphylogenetic Turn and Architecture: In (Tertiary) Memory of Bernard Stiegler
Efficient Light Harvesting in Surface Barrier Solar Cells with Quasiperiodical Microrelief and Metal Nanowires
Creators: name: Dmitruk, N.L.
name: Korovin, A.V.
name: Borkovskaya, O.Yu.
name: Mamontova, I.B.
name: Mamykin, S.V.
name: Kotova, N.V.
name: Romanyuk, V.R.
Publisher: name: WIP
Year: 2017
Subjects: New Materials and Concepts for Photovoltaic Devices
New Materials and Concepts for Cells and Modules

description: 33rd European Photovoltaic Solar Energy Conference and Exhibition; 119-123
description: Effect of increasing of Au(ITO)/GaAs surface barrier solar cells efficiency due to improving of electrical characteristics and light harvesting by quasiperiodical microrelief (quasigratings) formation and metal nanowires deposition has been studied. The technology of quasigrating preparation on GaAs substrate and
deposition of Au nanowires has been elaborated. Theoretical modelling and experimental investigation of optical, photoelectric and electric characteristics of these structures shows that besides of regular light trapping the physical mechanisms of the photocurrent enhancement effect are: 1) excitation of surface
plasmons/plasmon polaritons in metal nanowires; 2) improving of electrical characteristics due to decrease of the interface oxide layer thickness; 3) increase of photocarriers collection area due to dense net of Au nanowires on the surface of GaAs substrate.
Forethoughts and Afterthoughts on ‘the Productive Organs of Man’
Creators: name: Smith, Christopher
Publisher: name: FOOTPRINT
Year: 2022

description: This paper explores the ‘forethought’ of Bernard Stiegler’s Technics and Time, 1: The Fault of Epimetheus (1994). In particular, the paper focusses on the coupling of Karl Marx and Friedrich Engels and the impact of these figures on the relay of ideas concerning organs, organic matter and technology, or what Stiegler would come to call ‘organized inorganic matter’. The paper will also consider the ‘afterthought’ that derives from Stiegler’s book and its potential to prompt a rethinking of architectural experimentation and organization. The paper turns to Neil Spiller’s Communicating Vessels project and particularly to one joyous mechanism that came to be titled Little Soft Machinery (2006). The project enfolds all manner of architectural oddity, somewhere between the organic and inorganic.
description: FOOTPRINT, Vol. 16 No. 1 (2022): Issue # 30 | Spring/ Summer 2022 |The Epiphylogenetic Turn and Architecture: In (Tertiary) Memory of Bernard Stiegler
Perpendicular laser cooling with a rotating wall potential in a Penning trap
Creators: name: Torrisi, Steven B.
name: Britton, Joseph W.
name: Bohnet, Justin G.
name: Bollinger, John J.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: Atomic Physics (physics.atom-ph)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: We investigate the impact of a rotating wall potential on perpendicular laser cooling in a Penning ion trap. By including energy exchange with the rotating wall, we extend previous Doppler laser cooling theory and show that low perpendicular temperatures are more readily achieved with a rotating wall than without. Detailed numerical studies determine optimal operating parameters for producing low temperature, stable 2-dimensional crystals, important for quantum information processing experiments employing Penning traps.
description: 9 pages, 8 figures, contains minor changes based on referee comments
A multi-player, multi-team nonlocal game for the toric code
Creators: name: Bulchandani, Vir B.
name: Burnell, Fiona J.
name: Sondhi, S. L.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Nonlocal games yield an unusual perspective on entangled quantum states. The defining property of such games is that a set of players in joint possession of an entangled state can win the game with higher probability than is allowed by classical physics. Here we construct a nonlocal game that can be won with certainty by $2N$ players if they have access to the ground state of the toric code on as many qubits. By contrast, the game cannot be won by classical players more than half the time in the large $N$ limit. Our game differs from previous examples because it arranges the players on a lattice and allows them to carry out quantum operations in teams, whose composition is dynamically specified. This is natural when seeking to characterize the degree of quantumness of non-trivial many-body states, which potentially include states in much more varied phases of matter than the toric code. We present generalizations of the toric code game to states with $\mathbb{Z}_M$ topological order.
description: v2: 6+3 pages, 2 figures, proof of uniqueness theorem moved from appendix to main text, close to published version
Architectures of Thought
Creators: name: Tsagdis, Georgios
Publisher: name: FOOTPRINT
Year: 2022

description: The present essay advances Stiegler’s neganthropological project by supplementing its genetic structural framework with a metabolic plane of analysis. Neganthropology demands the creation of technologies (exosomatic tertiary inscriptions) that arrest and reconfigure entropic flow, enabling thus collective and personal individuation as well as the diversification of noetic life. All life however must live in and through the ‘now’, which it transforms. This ephemeral yet general metabolic operation of life constitutes the minimal negentropic unit that can be maintained, a ‘now’ that neganthropology must attend to. To do so, technology, life and thought must be examined together, none being elevated to the status of a model for the other two. In attempting a non-hierarchic configuration of the three, the essay proposes a new architecture.
description: FOOTPRINT, Vol. 16 No. 1 (2022): Issue # 30 | Spring/ Summer 2022 |The Epiphylogenetic Turn and Architecture: In (Tertiary) Memory of Bernard Stiegler
Hydrometallurgical Purification of Magnesium-Doped Silicon by Different Acids
Creators: name: Safarian, J.
name: Espelien, S.
Publisher: name: WIP
Year: 2017
Subjects: Silicon Photovoltaics
Feedstock, Crystallisation, Wafering, Defect Engineering

description: 33rd European Photovoltaic Solar Energy Conference and Exhibition; 480-482
description: The purification of commercial metallurgical grade silicon through alloying and then acid leaching is studied. Magnesium
is added into molten silicon and then acid leaching of the solidified Si-Mg alloy by HCl, H2SO4 and HNO3 acids is done.
The main parameters that are studied are acid concentration on leaching of particles with a specific size range. Chemical
analysis of the samples before and dafter leaching are determined by high resolution Inductively Coupled Plasma-Mass
Spectroscopy (ICP-MS). It is shown that the impurity removal from silicon is depending on the type of acid. Moreover, the
applied method is efficient for the removal of particular impurities such as P, Fe, Ti, Al, Ca, …. In addition, it is indicated
that HCl is more effective than the other types of acids for given process conditions. Moreover, the best silicon purification,
and in particular P removal is obtained when HCl with 10% and 15% concentrations is used.
Tres retratos de Juan VIII Paleólogo
Creators: name: Algaba Calderón, Fernando
Publisher: name: La Rivista di Engramma
Year: 2007
Subjects: Juan VIII Paleologo
Byzantium
Iconography
Pisanello
Antonio Vivarini
Apollonio di Giovanni

description: After the 1438-39 Council of Ferrara-Florence, the image of Juan VIII Paleologo spread out as an iconographic typology. The author describes three masterpieces in which the Byzantine emperor was intentionally depicted and not only reproduced through his profile traits.
Being in the Hyper City, and the Posthuman Body
Creators: name: Landi, Davide
Publisher: name: FOOTPRINT
Year: 2022

description: Since ancient times, the analogy of the body in relation to buildings was central both in Western and Eastern architectural and urban design. Over time, the prevalence of economies over inhabitants’ experience led to the adoption of architectural and urban strategies to improve spatial efficiency and specialisation. The analogy of body-buildings was affected negatively. Nonetheless, the 21st-century technological revolution transformed the city and its inhabitants into something different. These are quantified cities which are experienced dynamically by quantified post-human beings. Consequently, a renewed paradigm body - built environment is established. Taking this position into consideration, this article critically investigates the paradigm Hyper City – Post-Human body. In this, the article introduces an alternative psychological interpretation of the analogy body - buildings. It is built around an acknowledgement of a necessary continuity between digital and physical domains to effectively question the notion of urbanisation.
description: FOOTPRINT, Vol. 16 No. 1 (2022): Issue # 30 | Spring/ Summer 2022 |The Epiphylogenetic Turn and Architecture: In (Tertiary) Memory of Bernard Stiegler
Open Catalogue of Business Models
Creators: name: Lowe, Anna Sera
name: Oloo, Martin
name: Goh, Gertrude Mawuena
Publisher: name: Zenodo
Year: 2023
Subjects: maker movement
open hardware
business model

description: This Open Catalogue of Business Models has been developed by the MAKE project to contribute to the financial sustainability of makerspaces and support the creation of a decentralized production ecosystem. It is intended to be a source of inspiration. It cannot tell you what business models will work in your community, but it can give you ideas and guidance on what might work. The elements in the catalogue are designed to be used like building blocks –you can choose a few and combine them in your own way to create a unique model for your space. You will need to adapt each element to your environment and experiment to find out which variations work best in your own community.
Mechanically Stacked Dual-Junction and Triple-Junction III-V/Si-IBC Cells with Efficiencies of 31.5 % and 35.4 %
Creators: name: Rienäcker, M.
name: Schnabel, M.
name: Warren, E.
name: Merkle, A.
name: Schulte-Huxel, H.
name: Klein, T.R.
name: Van Hest, M.F.A.M.
name: Steiner, M.A.
name: Geisz, J.
name: Kajari-Schröder, S.
name: Niepelt, R.
name: Schmidt, J.
name: Brendel, R.
name: Stradins, P.
name: Tamboli, A.
name: Peibst, R.
Publisher: name: WIP
Year: 2017
Subjects: New Materials and Concepts for Photovoltaic Devices
New Materials and Concepts for Cells and Modules

description: 33rd European Photovoltaic Solar Energy Conference and Exhibition; 1-4
description: The theoretical efficiency limit of 29.4 % for single-junction crystalline Silicon (c-Si) solar cells is an
insurmountable barrier that is being steadily approached within the last decades. Combining the Si cell with a second
absorber material on top in a dual junction tandem or triple junction solar cell is an attractive option to surpass this
limit significantly. We demonstrate a mechanically stacked GaInP//Si dual-junction cell with an in-house measured
efficiency of 31.5 % and a GaInP/GaAs//Si triple-junction cell with a certified efficiency of 35.4±0.5 %
Stabilization of Damped Waves on Spheres and Zoll Surfaces of Revolution
Creators: name: Zhu, Hui
Publisher: name: arXiv
Year: 2016
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We study the strong stabilization of wave equations on some sphere-like manifolds, with rough damping terms which do not satisfy the geometric control condition posed by Rauch-Taylor and Bardos-Lebeau-Rauch. We begin with an unpublished result of G. Lebeau, which states that on S^d , the indicator function of the upper hemisphere strongly stabilizes the damped wave equation, even though the equators, which are geodesics contained in the boundary of the upper hemisphere, do not enter the damping region. Then we extend this result on dimension 2, to Zoll surfaces of revolution, whose geometry is similar to that of S^2 . In particular, geometric objects such as the equator, and the hemi-surfaces are well defined. Our result states that the indicator function of the upper hemi-surface strongly stabilizes the damped wave equation, even though the equator, as a geodesic, does not enter the upper hemi-surface either.
description: 30 pages, 1 figure
A semi-industrial reactor for producing biodiesel from waste cooking oil
Creators: name: Ibrahim, Said M. A.
name: Abed, K. A.
name: Gad, M. S.
name: Abu Hashish, H. M.
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biochemistry
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified

description: This work offers a pilot plant unit designed to produce biodiesel efficiently from waste cooking oil (WCO). The quality of biodiesel from the semi-industrial plant met American Society of Testing and Materials (ASTM) standards with a maximum yield of 71.56%. Many biodiesel samples were tested, but the highest yield was 71.56%, achieved with a mixing speed of 200 rpm, 20% methanol/oil ratio, reaction time of 90 min, reaction temperature of 70 °C, and catalyst concentration of 1%. The fatty acids in WCO were palmitic, oleic, and linoleic, 5.13, 37.22 and 7.66%, but for biodiesel they were 5.1, 26.16 and 49.51%, respectively. Thermal gravimetric analysis and Thin-layer chromatography confirmed the formation of biodiesel. The ester is in the range of 1741:2823 cm−1, which is related to the stretching band of C = O. The physicochemical properties agreed with ASTM standards. The biodiesel yield is significantly affected by the quality of the used WCO. The results indicate the significant effect of purity, quality, cooking temperature and cooking time of the used oil on biodiesel yield. A high yield of 94.5% was obtained for high-quality oil that was slightly heated for no cooking time. The designed pilot plant is efficient and reliable at producing biodiesel from WCO.
Transductive Architecture
Creators: name: Gough, Tim
Publisher: name: FOOTPRINT
Year: 2022

description: This paper proposes a transductive architecture informed by Stiegler’s organology, and shows how such an organology exists already within the work of Le Corbusier. I show how his early work developed from a more conventional formal ontology, exemplified by his Artist’s Studio project of 1910, firstly towards a more playful compositional strategy in the Dom-ino house and the mass concrete houses of 1915, and then onto a fully organological approach where the relations between elements – existing and new buildings, inhabitants and environments – are primary (in transductive manner), and the terms of those relations (us, the building) come, as it were, afterwards. Citing Vers une architecture and analysing Villa Savoye as a tertiary protention that responds to the tertiary retentions of baroque and neo-classical Paris, I show how our ontology of architecture can profoundly change not only how we talk about it, but how we engage and become it.
description: FOOTPRINT, Vol. 16 No. 1 (2022): Issue # 30 | Spring/ Summer 2022 |The Epiphylogenetic Turn and Architecture: In (Tertiary) Memory of Bernard Stiegler
Experimental Design for Linear Functionals in Reproducing Kernel Hilbert Spaces
Creators: name: Mutný, Mojmír
name: Krause, Andreas
Publisher: name: arXiv
Year: 2022
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Statistics Theory (math.ST)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: Optimal experimental design seeks to determine the most informative allocation of experiments to infer an unknown statistical quantity. In this work, we investigate the optimal design of experiments for {\em estimation of linear functionals in reproducing kernel Hilbert spaces (RKHSs)}. This problem has been extensively studied in the linear regression setting under an estimability condition, which allows estimating parameters without bias. We generalize this framework to RKHSs, and allow for the linear functional to be only approximately inferred, i.e., with a fixed bias. This scenario captures many important modern applications, such as estimation of gradient maps, integrals, and solutions to differential equations. We provide algorithms for constructing bias-aware designs for linear functionals. We derive non-asymptotic confidence sets for fixed and adaptive designs under sub-Gaussian noise, enabling us to certify estimation with bounded error with high probability.
Forest Semiosis
Creators: name: Vangeest, Jacob
Publisher: name: FOOTPRINT
Year: 2022

description: This article operationalizes Bernard Stiegler’s conceptualization of the Neganthropocene, expanding his consideration of thinking (penser) as care (panser) or pænsée beyond the anthropo-techne limitations of his thought through the notion of a posthuman asignifying semiotics. It begins with an overview of Stiegler’s notion of the Neganthropocene as a mode of epochal thought building towards noesis and pænsée with the use of epiphylogenetic and exosomatic memory systems. Here, Stiegler’s approach is exposed as anthropo-techne centric, which in turn limits the possibilities of noesis. Turning to the work of C.S. Peirce, Gilles Deleuze, and Felix Guattari, an alternative formulation of epiphylogenetic memory is provided through the interrelation of trees and forests: in particular the coastal redwood (sequoia sempervirens). This asignifying semiotics provides the criteria for infusing Stiegler’s epiphylogenesis beyond the human. In turn, Stiegler is brought closer to the theories of entangled care presented in the work of theorists such as María Puig De La Bellacasa and Natasha Myers, allowing for a more dynamic design process.
description: FOOTPRINT, Vol. 16 No. 1 (2022): Issue # 30 | Spring/ Summer 2022 |The Epiphylogenetic Turn and Architecture: In (Tertiary) Memory of Bernard Stiegler