cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The impact of dynamic pressure bumps on the observational properties of protoplanetary disks
Creators: name: Stadler, Jochen
name: Gárate, Matías
name: Pinilla, Paola
name: Lenz, Christian
name: Dullemond, Cornelis P.
name: Birnstiel, Til
name: Stammler, Sebastian M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Over the last years, large (sub-)millimetre surveys of protoplanetary disks have well constrained the demographics of disks, such as their millimetre luminosities, spectral indices, and disk radii. Additionally, several high-resolution observations have revealed an abundance of substructures in the disks dust continuum. The most prominent are ring like structures, likely due to pressure bumps trapping dust particles. The origins and characteristics of these bumps, nevertheless, need to be further investigated. The purpose of this work is to study how dynamic pressure bumps affect observational properties of protoplanetary disks. We further aim to differentiate between the planetary- versus zonal flow-origin of pressure bumps. We perform one-dimensional gas and dust evolution simulations, setting up models with varying pressure bump features. We subsequently run radiative transfer calculations to obtain synthetic images and the different quantities of observations. We find that the outermost pressure bump determines the disks dust size across different millimetre wavelengths. Our modelled dust traps need to form early (< 0.1 Myr), fast (on viscous timescales), and must be long lived (> Myr) to obtain the observed high millimetre luminosities and low spectral indices of disks. While the planetary bump models can reproduce these observables irrespectively of the opacity prescription, the highest opacities are needed for the zonal flow bump model to be in line with observations. Our findings favour the planetary- over the zonal flow-origin of pressure bumps and support the idea that planet formation already occurs in early class 0-1 stages of circumstellar disks. The determination of the disks effective size through its outermost pressure bump also delivers a possible answer to why disks in recent low-resolution surveys appear to have the same sizes across different millimetre wavelengths.
description: 22 pages, 15 figures. To be published in Astronomy & Astrophysics
Optimized 3D printed wheelchair racing gloves
Creators: name: Willmott, James
name: Watts, Darren
Publisher: name: Transactions on Additive Manufacturing Meets Medicine
Year: 2021

description: Wheelchair racing gloves are often hand crafted from thermoplastics. The geometries are unique to the individual, often with thumb or finger cavities rendering line-of-sight laser scanning techniques inappropriate for full digital capture. This study describes the use of micro-CT to reverse engineer the bespoke hard gloves of an elite Paralympic athlete, with fabrication via 3D printing. Subsequent design changes, combined with the identification and manipulation of key process parameters during material extrusion, have demonstrated this approach affords enhanced glove performance. Preliminary rolling road test results suggest a competitive advantage for the athlete. The approach is believed transferrable within physical rehabilitation.
description: Transactions on Additive Manufacturing Meets Medicine, Vol 3 No 1 (2021): Trans. AMMM
One-loop Factorization for Inclusive Hadron Production in $pA$ Collisions in the Saturation Formalism
Creators: name: Chirilli, Giovanni A.
name: Xiao, Bo-Wen
name: Yuan, Feng
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We demonstrate the QCD factorization for inclusive hadron production in $pA$ collisions in the saturation formalism at one-loop order, with explicit calculation of both real and virtual gluon radiation diagrams. The collinear divergences associated with the incoming parton distribution of the nucleon and the outgoing fragmentation function of the final state hadron, as well as the rapidity divergence with small-$x$ dipole gluon distribution of the nucleus are factorized into the splittings of the associated parton distribution and fragmentation functions and the energy evolution of the dipole gluon distribution function. The hard coefficient function is evaluated at one-loop order, and contains no divergence.
description: 8 pages, 1 figure
Osteointegration of 3D-printed bone plates
Creators: name: Yan, Lina
name: Kostadinov, Aleksandar
name: Xie, Ming-You
name: O'Neill, Gavin
Publisher: name: Transactions on Additive Manufacturing Meets Medicine
Year: 2021

description: Current orthopedic plates come in standardized sizes using bio-compatible materials such as stainless steel and titanium. The toughness of the metallic materials and the standardizes sizes of the plates, however, are major causes for a delayed healing of the fracture. In the worst case, this effect can lead to a non-union of the bone. In this study, we employed 3D-printing to tailor the mechanical properties of the bone plates using four different lattice designs. The functionality of the semi porous implants was systematically evaluated under both of in vitro and in vivo animal studies. The results indicate that the novel implant design induces osteointegration suggesting an improved recovery of the fracture.
description: Transactions on Additive Manufacturing Meets Medicine, Vol 3 No 1 (2021): Trans. AMMM
Body part surrogates for safety research
Creators: name: Koptyug, Andrey
name: Petrone, Nicola
name: Bäckström, Mikael
Publisher: name: Transactions on Additive Manufacturing Meets Medicine
Year: 2021

description: Present paper outlines the advantages of experiments performed using human body part surrogates (physical models) in combination with virtual experiments carried out using numerical models for the medical studies, safety research and development of safety equipment. Material uses the examples of setups using instrumented human head and neck surrogates developed and constructed at Mid Sweden University, Sweden and the University of Padua, Italy.
description: Transactions on Additive Manufacturing Meets Medicine, Vol 3 No 1 (2021): Trans. AMMM
The Height of Chromospheric Loops in an Emerging Flux Region
Creators: name: Merenda, L.
name: Lagg, A.
name: Solanki, S. K.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Context. The chromospheric layer observable with the He I 10830 Å triplet is strongly warped. The analysis of the magnetic morphology of this layer therefore requires a reliable technique to determine the height at which the He I absorption takes place. Aims. The He I absorption signature connecting two pores of opposite polarity in an emerging flux region is investigated. This signature is suggestive of a loop system connecting the two pores. We aim to show that limits can be set on the height of this chromospheric loop system. Methods. The increasing anisotropy in the illumination of a thin, magnetic structure intensifies the linear polarization signal observed in the He I triplet with height. This signal is altered by the Hanle effect. We apply an inversion technique incorporating the joint action of the Hanle and Zeeman effects, with the absorption layer height being one of the free parameters. Results. The observed linear polarization signal can be explained only if the loop apex is higher than \approx5 Mm. Best agreement with the observations is achieved for a height of 6.3 Mm. Conclusions. The strength of the linear polarization signal in the loop apex is inconsistent with the assumption of a He I absorption layer at a constant height level. The determined height supports the earlier conclusion that dark He 10830 Å filaments in emerging flux regions trace emerging loops.
description: 7 pages, 4 figures
Design and 3D printing of miniaturized dialyzers for laboratory use
Creators: name: Krüsemann, Horst
name: Töllner, Philip
name: Westphal, Erik
name: Hofrichter, Jacqueline
name: Seitz, Hermann
Publisher: name: Transactions on Additive Manufacturing Meets Medicine
Year: 2021

description: The limiting factor of extracorporeal blood purification in preclinical testing is the large volume of blood required. For this reason, developing miniaturized devices for few milliliters of patient’s blood is the focus of this work. Clinical dialyzers are adapted to the sample volume by appropriate downscaling. The housings were created digitally, printed using polyjet technology and iteratively refined. A design was achieved that enables optimal potting results and homogeneous distribution of fibers within the dialyzer. Minia-turized housings with complex design and high resolution could be realized. Nevertheless, performance comparison to the clinical device is necessary for future laboratory application.
description: Transactions on Additive Manufacturing Meets Medicine, Vol 3 No 1 (2021): Trans. AMMM
Regulatory Framework for 3D Printed Custom-Made Devices in Europe
Creators: name: Carl, Ann-Kathrin
name: Hochmann, David
Publisher: name: Transactions on Additive Manufacturing Meets Medicine
Year: 2021

description: Additive manufacturing (AM) has been growing continuously over the past 20 years, enabling unprecedented tailoring to the anatomy of each patient. In Europe, custom-made devices qualify for an exemption and pass a simplified approval process. New technologies, like AM, provoke questions about the adequacy of the current regulatory framework for custom-made devices. This article addresses the regulatory requirements for such devices in Europe and discusses the implications for AM. It concludes that the legal framework for custom-made devices entails uncertainties which need to be resolved to guide manufacturers through the regulatory requirements, highlighting the specific areas of focus for AM.
description: Transactions on Additive Manufacturing Meets Medicine, Vol 3 No 1 (2021): Trans. AMMM
Gauge theory on a space with linear Lie type fuzziness
Creators: name: Khorrami, M.
name: Fatollahi, A. H.
name: Shariati, A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The U(1) gauge theory on a space with Lie type noncommutativity is constructed. The construction is based on the group of translation in Fourier space, which in contrast to space itself is commutative. In analogy with lattice gauge theory, the object playing the role of flux of field strength per plaquette, as well as the action, are constructed. It is observed that the theory, in comparison with ordinary U(1) gauge theory, has an extra gauge field component. This phenomena is reminiscent of similar ones in formulation of SU(N) gauge theory in space with canonical noncommutativity, and also appearance of gauge field component in discrete direction of Connes' construction of the Standard Model.
description: latex2e, 1+17 pages, no fig. arXiv admin note: substantial text overlap with arXiv:1208.2359. v2: font modification
Das Rheinische Landesmuseum Bonn / Rheinisches Amt für Bodendenkmalpflege. Ausgrabungen und Funde 1980
Creators: name: Gechter, Michael
name: Joachim, Hans-Eckart
name: Kunow, Jürgen
Publisher: name: Bonner Jahrbücher
Year: 2020

description: Bonner Jahrbücher, Bd. 182.1982: Bonner Jahrbücher
Radiation Hardness of a Wide Spectral Range SiPM with Quasi-Spherical Junction
Creators: name: Römer, Julius
name: Garutti, Erika
name: Schmailzl, Wolfgang
name: Schwandt, Jörn
name: Martens, Stephan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: New pixel geometries are on the rise to achieve high sensitivity in near-infrared wavelengths with silicon photomultipliers (SiPMs). We test prototypes of the tip avalanche photo-diodes, which feature a quasi-spherical p-n junction and a high photodetection efficiency over a wide spectral range, and analyze the performance after neutron irradiation. The observed increase in dark count rate is significantly smaller than for a SiPM with a conventional design, indicating a good radiation hardness of the pixel geometry.
description: 8 pages, 7 figures. Submitted to NIM Proceedings. This work was presented at the NDIP20 conference
Michel Py, L’oppidum des Casteis à Nages (Gard)
Creators: name: Kimmig, Wolfgang
Publisher: name: Bonner Jahrbücher
Year: 2020

description: Rezension zu: Michel Py, L’oppidum des Casteis à Nages (Gard). Fouilles 1958-1974. Gallia Beiheft 35. Editions du Centre National de la Recherche Scientifique, Paris 1978. 361 Seiten mit zahlreichen Abbildungen und Tabellen.
description: Bonner Jahrbücher, Bd. 182.1982: Bonner Jahrbücher
Volume-limited sample of low-mass red giant stars, the progenitors of hot subdwarf stars I. Sample selection and binary classification method
Creators: name: Uzundag, Murat
name: Jones, Matias I.
name: Vučković, Maja
name: Vos, Joris
name: Bobrick, Alexey
name: Paladini, Claudia
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The current theory predicts that hot subdwarf binaries are produced from evolved low-mass binaries that have undergone mass transfer and drastic mass loss during either a common envelope phase or a stable Roche lobe overflow while on the red giant branch (RGB). We perform a spectroscopic survey to find binary systems that include low-mass red giants near the tip of the RGB, which are predicted to be the direct progenitors of subdwarf B (sdB) stars. We aim to obtain a homogeneous sample to search for the observational evidence of correlations between the key parameters governing the formation of sdB stars and constrain the physics of stable mass transfer. In this work, we concentrated on the southern hemisphere targets and conducted a spectroscopic survey of 88 red giant stars to search for the long-period RGB + MS binary systems within 200\,pc. Combining radial velocity (RV) measurements from ground-based observations with CORALIE and RV measurements from $Gaia$ DR2 and early data release 3 (eDR3) as well as the astrometric excess noise and RUWE measurements from $Gaia$ DR3, we defined a robust binary classification method. In addition, we searched for known binary systems in the literature and in the $Gaia$ DR3. We select a total of 211 RGB candidates in the southern hemisphere within 200\,pc based on the $Gaia$ DR2 color-magnitude diagram. Among them, a total of 33 red giants were reported as binary systems with orbital periods between 100 and 900 days, some of which are expected to be the direct progenitors of wide binary sdB stars. In addition, we classified 37 new MS\,+\,RGB binary candidates, whose orbital parameters will be measured with future spectroscopic follow-up.
description: 9 pages, 2 figures, accepted for publication in A&A
Electron cyclotron resonance near the axis of the gas-dynamic trap
Creators: name: Bagulov, D. S.
name: Kotelnikov, I. A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Propagation of an extraordinary electromagnetic wave in the vicinity of electron cyclotron resonance surface in an open linear trap is studied analytically, taking into account inhomogeneity of the magnetic field in paraxial approximation. Ray trajectories are derived from a reduced dispersion equation that makes it possible to avoid the difficulty associated with a transition from large propagation angles to the case of strictly longitudinal propagation. Our approach is based on the theory, originally developed by the Zvonkov and Timofeev [1], who used the paraxial approximation for the magnetic field strength, but did not consider the slope of the magnetic field lines, which led to considerable error, as has been recently noted by Gospodchikov and Smolyakova [2]. We have found ray trajectories in analytic form and demonstrated that the inhomogeneity of both the magnetic field strength and the field direction can qualitatively change the picture of wave propagation and significantly affect the efficiency of electron cyclotron heating of a plasma in a linear magnetic trap. Analysis of the ray trajectories has revealed a criterion for the resonance point on the axis of the trap to be an attractor for the ray trajectories. It is also shown that a family of ray trajectories can still reach the resonance point on the axis if the latter generally repels the ray trajectories. As an example, results of general theory are applied to the electron cyclotron resonance heating experiment which is under preparation on the Gas Dynamic Trap in the Budker Institute of Nuclear Physics [3].
The development of Hypromellose based semisolid 3D printing inks for drug delivery
Creators: name: Zhang, Bin
name: Teoh, Xinyi
name: Belton, Peter
name: Gleadall, Andy
name: Bibb, Richard
name: Qi, Sheng
Publisher: name: Transactions on Additive Manufacturing Meets Medicine
Year: 2021

description: 3D printing is a promising method for producing medicines to tailored individual patient’s needs in the optimal dose and drug combinations which subsequently leads to enhanced therapeutic outcome. Here, we developed semisolid ink formulations based on hydroxypropyl methylcellulose (HPMC). We investigated the effects of additives including PVP and SiO2 and a model drug, paracetamol, on the HPMC ink rheology behaviour and shape fidelity when produced using semisolid 3D extrusion printing. The formulations were extruded from the printing nozzle and laminated layer-by-layer. The current study presents novel drug-loaded HPMC-based inks for 3D construct fabrication for potential drug delivery applications.
description: Transactions on Additive Manufacturing Meets Medicine, Vol 3 No 1 (2021): Trans. AMMM
Novel 3D printed custom kinesiology tape for variable usage scenarios
Creators: name: Duckworth, Abigail
name: Gleadall, Andrew
name: Bibb, Richard
Publisher: name: Transactions on Additive Manufacturing Meets Medicine
Year: 2021

description: Kinesiology tape is a commonly used non-pharmacological, pain alleviating treatment modality and its usage is being continually expanded into differing clinical settings such as the reduction of post-operative swelling and injury rehabilitation. At present, it is not possible to customize the mechanical properties of the tape to individual patients or usage scenarios. This paper presents the novel design and method of 3D printing lattice structures directly onto kinesiology tape in order to obtain tailorable mechanical properties, using an economical printing system and materials that are appropriate for a clinical setting.
description: Transactions on Additive Manufacturing Meets Medicine, Vol 3 No 1 (2021): Trans. AMMM
On the equations of the inverse kinematics problem
Creators: name: Voytik, Vitaliy
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The paper derived differential equations which solve the problem of restoration the motion parameters for a rigid reference frame from the known proper acceleration and angular velocity of its origin as functions of proper time. These equations are based on the well-known transformation to an arbitrary rigid non-inertial reference frame, which generalized the Lorentz transformation, takes into account the fact of her proper of Thomas precession and rigid fixation of the metric form reference frame. The role of this problem in physics is that all such reference frames found with the same characteristics will have the same properties. Another important advantage of these equations is that they allow you to find the motion of the non-inertial reference frame with respect to an arbitrary inertial frame. The resulting equations are nonlinear differential vector equation of the first order Riccati type \[\mathbf{\dot{v}'}=\frac{d\,\mathbf{{v}'}}{dt}=\mathbf{{W}'}-(\mathbf{{W}'{v}'})\mathbf{{v}'}-\mathbfΩ'\times \mathbf{{v}'}\] and known system of 3 equations \[\frac {1}{2}\,e^{αλν}a^{ λβ} \frac{da^{αβ} }{dt}=ω'^{ν}\,,\] which allows to determine the orientation of the coordinate system for a given function on the right side of the equation \[ {\boldsymbolω}'=\mathbfΩ'-\frac{1-\sqrt{1-{{{{v}'}}^{2}}}}{{{{{v}'}}^{2}}}\,\mathbf{{v}'}\times \mathbf{{W}'}\,,\] which are type angular velocity. The consequences of the obtained equations have been successfully verified on the example of a uniformly rotating disk.
description: 12 p
Moebius rigidity of invariant metrics in boundaries of symmetric spaces of rank 1
Creators: name: Platis, I. D.
name: Schroeder, V.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Metric Geometry (math.MG)
subject: FOS: Mathematics

description: Let $\partial{\bf H}^n_{\mathbb K}$ denote the boundary of a symmetric space of rank-one and of non-compact type and let $d_{\mathfrak{H}}$ be the Korányi metric defined in $\partial{\bf H}^n_{\mathbb K}$. We prove that if $d$ is a metric on $\partial{\bf H}^n_{\mathbb K}$ such that all Heisenberg similarities are $d$-Möbius maps, then under a topological condition $d$ is a constant multiple of a power of $d_{\mathfrak{H}}$.
description: Third version, 13 pages. Contains simpler and shortened proofs
Modulus of revolution rings in the Heisenberg group
Creators: name: Platis, Ioannis D.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Metric Geometry (math.MG)
subject: FOS: Mathematics
subject: 30L05, 30C75

description: Let $\mathcal{S}$ be a surface of revolution embedded in the Heisenberg group $\mathcal{H}$. A revolution ring $R_{a,b}(\mathcal{S})$, $0
description: 15 pages, correct statement and proof of the main theorem
Immo Beyer, Die Tempel von Dreros und Prinias A und die Chronologie der kretischen Kunst des 8. und 7. Jahrh. v. Chr.
Creators: name: Hiller, Stefan
Publisher: name: Bonner Jahrbücher
Year: 2020

description: Rezension zu: Immo Beyer, Die Tempel von Dreros und Prinias A und die Chronologie der kretischen Kunst des 8. und 7. Jahrh. v. Chr. Verlag Ernst Wasmuth, Tübingen 1976. 187 Seiten, 66 Tafeln.
description: Bonner Jahrbücher, Bd. 182.1982: Bonner Jahrbücher
dmscatter: A Fast Program for WIMP-Nucleus Scattering
Creators: name: Gorton, Oliver
name: Johnson, Calvin
name: Jiao, Changfeng
name: Nikoleyczik, Jonathan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Nuclear Theory (nucl-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Recent work, using an effective field theory framework, has shown the number of possible couplings between nucleons and the dark-matter-candidate Weakly Interacting Massive Particles (WIMPs) is larger than previously thought. Inspired by an existing Mathematica script that computes the target response, we have developed a fast, modern Fortran code, including optional OpenMP parallelization, along with a user-friendly Python wrapper, to swiftly and efficiently explore many scenarios, with output aligned with practices of current dark matter searches. A library of most of the important target nuclides is included; users may also import their own nuclear structure data, in the form of reduced one-body density matrices. The main output is the differential event rate as a function of recoil energy, needed for modeling detector response rates, but intermediate results such as nuclear form factors can be readily accessed.
description: 15 pages, 6 figures, preprint submitted to Computer Physics Communications, code available at https://github.com/ogorton/dmscatter, version 2 updated with additional references
Nuclear condensate and helium white dwarfs
Creators: name: Bedaque, Paulo F.
name: Berkowitz, Evan
name: Cherman, Aleksey
Publisher: name: arXiv
Year: 2011
Subjects: subject: Nuclear Theory (nucl-th)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider a high density region of the helium phase diagram, where the nuclei form a Bose-Einstein condensate rather than a classical plasma or a crystal. Helium in this phase may be present in helium-core white dwarfs. We show that in this regime there is a new gapless quasiparticle not previously noticed, arising when the constraints imposed by gauge symmetry are taken into account. The contribution of this quasiparticle to the specific heat of a white dwarf core turns out to be comparable in a range of temperatures to the contribution from the particle-hole excitations of the degenerate electrons. The specific heat in the condensed phase is two orders of magnitude smaller than in the uncondensed plasma phase, which is the ground state at higher temperatures, and four orders of magnitude smaller than the specific heat that an ion lattice would provide, if formed. Since the specific heat of the core is an important input for setting the rate of cooling of a white dwarf star, it may turn out that such a change in the thermal properties of the cores of helium white dwarfs has observable implications.
description: 11 pages, 3 figures
Frugale Innovation: Wissenschaftliche Einordnung eines neuen Innovationsbegriffs
Creators: name: Herstatt, Cornelius
name: Tiwari, Rajnish
Publisher: name: TUHH Universitätsbibliothek
Year: 2015
Subjects: subject: Frugale Innovation , Schwellenländer , Innovationsmanagement , Reverse Innovation , Jugaad , Innovative Analogien
classificationCode: 330
subject: Wirtschaft

description: Neben der anscheinend hohen, praktischen Relevanz wird zur Zeit die Frage diskutiert, ob frugale Innovation ein eigenständiges, betriebswirtschaftliches Innovations-Konzept rechtfertigt, welches sich markant von anderen, bekannten Ansätzen bzw. einer generellen „Low cost“-Strategie eines Unternehmens unterscheiden lässt. Frugale Innovationen sind per se nicht „neu“, denkt man bspw. an der bereits seit Jahrzehnten anhaltenden Erfolg der schwedischen Möbelhauskette IKEA. Frugale Innovationsarbeit greift auch auf zahlreiche, bekannte Instrumente (z.B. Wertanalyse, Zielkostenanalyse, etc.) zurück. Neu ist allerdings die Vehemenz, mit der heute über frugale Innovation im Zusammenhang mit sehr unterschiedlichen Produkt- und Dienstleistungsinnovationen sowohl im Kontext der entwickelten Welt wie auch Entwicklungsländern im Sinne einer generellen Innovationsstrategie gesprochen wird. Dies lässt sich auf Veränderungen zurückführen, die einerseits mit dem Wachstum in Ländern wie Indien oder China und andererseits mit demographischen sowie einkommensbezogenen Entwicklungen in den USA oder Europa zusammenhängen und in beiden "Welten" Nachfrage an Produkten und Dienstleistungen auslösen, die „good enough“ und „affordable“ sind. Diese Veränderungen stellen Unternehmen zumindest in der entwickelten Welt vor große Herausforderungen, insbesondere wenn diese sich in ihrer bisherigen Strategie ausschließlich auf Premium-Segmente fokussiert haben und keine (technischen) Lösungen für mittlere oder untere („Bottom-of-the pyramid“) Marktsegmente anbieten können. Hinzukommen Werteveränderungen in der Gesellschaft, die dazu führen, dass Kunden Produkte mit weniger bzw. pointierter Funktionalität suchen, die lange halten, zeitlos im Design sind und im Sinne von „Circular Economy“ keine Probleme für Mensch und Umwelt auslösen.
Orhan Bingöl, Das ionische Normalkapitel in hellenistischer und römischer Zeit in Kleinasien
Creators: name: Wesenberg, Burkhardt
Publisher: name: Bonner Jahrbücher
Year: 2020

description: Rezension zu: Orhan Bingöl, Das ionische Normalkapitel in hellenistischer und römischer Zeit in Kleinasien. Istanbuler Mitteilungen Beiheft 20. Verlag Ernst Wasmuth, Tübingen 1980. 247 Seiten, 41 Tafeln.
description: Bonner Jahrbücher, Bd. 182.1982: Bonner Jahrbücher
Control of Localized Multiple Excitation Dark States in Waveguide QED
Creators: name: Holzinger, Raphael
name: Gutierrez-Jauregui, Ricardo
name: Hönigl-Decrinis, Teresa
name: Kirchmair, Gerhard
name: Asenjo-Garcia, Ana
name: Ritsch, Helmut
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Subradiant excited states in finite chains of two-level quantum emitters coupled to a one-dimensional reservoir are a resource for superior photon storage and controlled photon manipulation. Typically, states storing multiple excitations exhibit fermionic correlations and are thus characterized by an anti-symmetric wavefunction, which makes them hard to prepare experimentally. Here we identify a class of quasi-localized dark states with up to half of the qubits excited, which appear for lattice constants that are an integer multiple of the guided-mode wavelength. They allow for a high-fidelity preparation and minimally invasive read out in state-of-the-art setups. In particular, we suggest an experimental implementation using a coplanar wave-guide coupled to superconducting transmon qubits on a chip. As free space and intrinsic losses are minimal, virtually perfect dark states can be achieved even for a low number of qubits, enabling fast preparation and manipulation with high fidelity.
description: 11 pages, 6 figures
Rapid tooling for micro injection molding of micro medical devices via digital light processing
Creators: name: Mau, Robert
name: Jüttner, Gabór
name: Gao, Ziwen
name: Matin, Farnaz
name: Alcacer Labrador, Dorian
name: Repp, Felix
name: John, Samuel
name: Scheper, Verena
name: Lenarz, Thomas
name: Seitz, Hermann
Publisher: name: Transactions on Additive Manufacturing Meets Medicine
Year: 2021

description: High-resolution additive manufacturing methods such as digital light processing (DLP) offer promising opportunities for rapid tooling for micro injection molding (µIM). There are possible savings in time and costs for µIM of small and micro plastic parts for sensors, electronics and (bio)medical products. Here we present the rapid tooling of polymeric molds via DLP 3D printing for the µIM of convex chips (Ø3.5 x 1.16 mm) of polypropylene (PP) as exemplarily chosen geometry and medical relevant material. Five molds (one mold has a total size of 8 x 22 x 10 mm, height x length x width, made of 2 pieces) were 3D printed simultaneously in t ~ 30 min (plus t = 10 min post-curing) with a layer height of z = 50 µm and a photopolymer consumption of m ~ 2 g per mold. The micro-injection-molded PP chips show a significant staircase-effect as a result of 3D printing of the molds. Nevertheless, the molds perform well (no cracks, adequate demolding) when used for a relatively low number of µIM cycles (n ~ 20, Tmold = 30 °C, TPP = 205 °C).
description: Transactions on Additive Manufacturing Meets Medicine, Vol 3 No 1 (2021): Trans. AMMM
Paul A. Holder, Studies in the Auxilia of the Roman Army from Augustus to Trajan
Creators: name: Speidel, Michael P.
Publisher: name: Bonner Jahrbücher
Year: 2020

description: Rezension zu: Paul A. Holder, Studies in the Auxilia of the Roman Army from Augustus to Trajan. British Archaeological Reports. International Series 70, Oxford 1980. 352 pages, 1 1 plates.
description: Bonner Jahrbücher, Bd. 182.1982: Bonner Jahrbücher
Jetted narrow-line Seyfert 1 galaxies breaking the jet paradigm -- a comprehensive study of host galaxy morphologies
Creators: name: Varglund, Irene
name: Järvelä, Emilia
name: Lähteenmäki, Anne
name: Berton, Marco
name: Ciroi, Stefano
name: Congiu, Enrico
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Narrow-line Seyfert 1 (NLS1) galaxies are unevolved active galactic nuclei (AGN) that exist predominantly in spiral galaxies. However, mostly due to the small number of sources studied, it has been under debate whether also the hosts of jetted NLS1 galaxies, a particular subclass of these sources hosting a relativistic jet, are disk-like, or elliptical, as the hosts of more powerful jetted AGN. We studied the host morphologies of 14 NLS1 galaxies, 11 of which have been detected at 37 GHz indicating that these sources harbour relativistic jets. The J- and Ks-band data used in this study were obtained with the Nordic Optical Telescope (NOT). We performed the photometric decomposition of the host galaxy using the band that gave a better fit, and additionally, created colour maps of all sources that had both a J- and a Ks-band observation. We were able to successfully model 12 sources, nine of which most likely have disk-like morphology. Of the remaining sources, one source could possibly be hosted either in a disk-like or a dwarf galaxy, and in two cases the results are inconclusive. Only one of our sources shows clear signs of interaction, but the colour maps of most of our sources hint at ample dust in the nuclei, possibly indicating earlier minor mergers, that can go unnoticed due to the limited resolution of these observations. Our results further support disk-like galaxies as the predominant host type of jetted NLS1 galaxies. Most importantly, with the number of modelled hosts of jetted NLS1s now exceeding 50, with only a few elliptical hosts, it seems to be safe to conclude that also disk-like galaxies are able to launch and maintain relativistic jets, and that the traditional jet paradigm stating that only massive elliptical galaxies are capable of hosting relativistic jets is severely outdated.
description: 24 pages, 40 figures, 17 tables, accepted to A&A
André Chastagnol, L’album municipal de Timgad
Creators: name: Horstkotte, H.
Publisher: name: Bonner Jahrbücher
Year: 2020

description: Rezension zu: André Chastagnol, L’album municipal de Timgad. Antiquitas R. 3, Band 22. Rudolf Habelt Verlag, Bonn 1978. 109 Seiten, 15 Tafeln.
description: Bonner Jahrbücher, Bd. 182.1982: Bonner Jahrbücher
GRB 100614A and GRB 100615A: two extremely dark GRBs
Creators: name: D'Elia, V.
name: Stratta, G.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Dark gamma-ray bursts (GRBs) are sources with a low optical-to-X-ray flux ratio. Proposed explanations for this darkness are: i) the GRB is at high redshift ii) dust in the GRB host galaxy absorbs the optical/NIR flux iii) GRBs have an intrinsically faint afterglow emission. Within this framework, GRB 100614A and GRB 100615A are extreme. In fact, they are bright in the X-rays, but no optical/NIR afterglow has been detected for either source, despite several follow-up campaigns began early after the triggers. We build optical-to-X-ray spectral energy distributions (SEDs) at the times at which the reddest upper limits are available, and we model our SEDs with the extinction curves of the Milky Way (MW), Small Magellanic Cloud (SMC), and the attenuation curve obtained for a sample of starburst galaxies. We find that to explain the deepest NIR upper limits assuming either a MW or SMC extinction law, a visual extinction of AV > 50 is required, which is extremely unlikely. Since both GRBs are bright in X-rays, explanation iii) also cannot explain their dark classification, unless optical radiation and X-rays are not part of the same synchrotron spectrum. An alternative, or complementary explanation of the previous possibility, involves greyer extinction laws. A starburst attenuation curve gives AV>10, which is less extreme, despite still very high. Assuming high redshift in addition to extinction, implies an AV>10 at z=2 and AV>4-5 at z=5, regardless of the adopted extinction recipe. A different, exotic possibility would be an extremely high redshift origin (z>17 given the missing K detections). Population III stars are expected to emerge at z ~ 20 and can produce GRBs with energies well above those inferred for our GRBs at these redshifts. Mid- and far-IR observations of these extreme class of GRBs can help us to differentiate between the proposed scenarios.
description: 8 pages, 13 ps figures. 2011, A&A, 532, 48. Abstract shortened with respect to the original version
Development of in vitro 3D brain models on laser fabricated scaffolds
Creators: name: Koroleva, Anastasia
name: El-Tamer, Ayman
name: Deiwick, Andrea
name: Koch, Lothar
name: Soriano, Jordi
name: Hinze, Ulf
name: Chichkov, Boris
Publisher: name: Transactions on Additive Manufacturing Meets Medicine
Year: 2021

description: In this work, we present the design and implementation of a 3D scaffold platform that supports and promotes intricate neuronal network development. 3D scaffolds were produced by two-photon polymerization (2PP), a high-resolution 3D laser microstructuring technology, using the biocompatible and non-degradable photopolymer. Human iPSC-derived neuronal networks have developed and interconnected in a 3D environment shaped by vertically stacked scaffold layers. The iPSC-derived neuronal progenitor cells could develop into cortical projection neurons (CNPs) of all six layers, different types of inhibitory neurons and glia. The network showed strong neuronal spontaneous activity that combined individual and collective signaling events. Our results highlight advanced microstructured 3D scaffolds as a reliable platform for 3D in vitro modelling of neuronal functions.
description: Transactions on Additive Manufacturing Meets Medicine, Vol 3 No 1 (2021): Trans. AMMM
Fuzzy Differences-in-Differences
Creators: name: de Chaisemartin, Clement
name: D'Haultfoeuille, Xavier
Publisher: name: arXiv
Year: 2015
Subjects: subject: Methodology (stat.ME)
subject: FOS: Computer and information sciences

description: Difference-in-differences (DID) is a method to evaluate the effect of a treatment. In its basic version, a "control group" is untreated at two dates, whereas a "treatment group" becomes fully treated at the second date. However, in many applications of the DID method, the treatment rate only increases more in the treatment group. In such fuzzy designs, a popular estimator of treatment effects is the DID of the outcome divided by the DID of the treatment. We show that this ratio identifies a local average treatment effect only if two homogeneous treatment effect assumptions are satisfied. We then propose two alternative estimands that do not rely on any assumption on treatment effects, and that can be used when the treatment rate does not change over time in the control group. We prove that the corresponding estimators are asymptotically normal. Finally, we use our results to revisit Duflo (2001).
Codes and shifted codes
Creators: name: Hird, J. T.
name: Jing, Naihuan
name: Stitzinger, Ernest
Publisher: name: arXiv
Year: 2011
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05E05

description: The action of the Bernstein operators on Schur functions was given in terms of codes in [CG] and extended to the analog in Schur Q-functions in [HJS]. We define a new combinatorial model of extended codes and show that both of these results follow from a natural combinatorial relation induced on codes. The new algebraic structure provides a natural setting for Schur functions indexed by compositions.
Irina I. Saverkina, Römische Sarkophage in der Ermitage
Creators: name: Koch, Guntram
Publisher: name: Bonner Jahrbücher
Year: 2020

description: Rezension zu: Irina I. Saverkina, Römische Sarkophage in der Ermitage. Römische Sarkophage, hrsg. von K. Zimmermann und I. I. Saverkina, Band 1. Akademie-Verlag, Berlin 1979, 65 Seiten, 64 Tafeln.
description: Bonner Jahrbücher, Bd. 182.1982: Bonner Jahrbücher
Tensile properties of polyamide 12 / black with 10wt.% copper samples manufactured by laser powder bed fusion
Creators: name: Wolf, Winston Kagisho Curtis
name: Vilardell, Anna Martín
name: Du Plessis, Anton
name: Yadroitsava, Ina
name: Yadroitsev, Igor
Publisher: name: Transactions on Additive Manufacturing Meets Medicine
Year: 2021

description: In laser powder bed fusion (L-PBF) of polymers, a proven material for biomedical applications is Polyamide 12 (PA 12) that is used for production of functional prototypes and end-use parts. The aim of this study is to investigate properties of in situ copper-modified polyamide (Sintratec PA12/B) at 10 wt.% Cu by L-PBF. Polymer-metal composites test samples were evaluated for their porosity, Cu distribution and tensile properties.
description: Transactions on Additive Manufacturing Meets Medicine, Vol 3 No 1 (2021): Trans. AMMM
In vitro and in vivo antileishmanial efficacy of a combination therapy of diminazene and artesunate against Leishmania donovani in BALB /c mice
Creators: name: Mutiso, Joshua Muli
name: Macharia, John Chege
name: Barasa, Mustafa
name: Taracha, Evans
name: Bourdichon, Alain J.
name: Gicheru, Michael Muita
Publisher: name: arXiv
Year: 2012
Subjects: subject: Tissues and Organs (q-bio.TO)
subject: FOS: Biological sciences

description: The in vitro and in vivo activity of diminazene (Dim), artesunate (Art) and combination of Dim and Art (Dim-Art) against Leishmania donovani was compared to reference drug; amphotericin B. IC50 of Dim-Art was found to be $2.28 \pm 0.24 μ$ g/mL while those of Dim and Art were $9.16 \pm 0.3 μ$ g/mL and $4.64 \pm 0.48 μ$ g/mL respectively. The IC50 for Amphot B was $0.16 \pm 0.32 μ$ g/mL against stationary-phase promastigotes. In vivo evaluation in the L. donovani BALB/c mice model indicated that treatments with the combined drug therapy at doses of 12.5 mg/kg for 28 consecutive days significantly ($p < 0.001$) reduced parasite burden in the spleen as compared to the single drug treatments given at the same dosages. Although parasite burden was slightly lower ($p < 0.05$) in the Amphot B group than in the Dim-Art treatment group, the present study demonstrates the positive advantage and the potential use of the combined therapy of Dim-Art over the constituent drugs, Dim or Art when used alone. Further evaluation is recommended to determine the most efficacious combination ratio of the two compounds.
description: 4 Pages, 3 Figures
Elisabeth Ettlinger und Katrin Roth-Rubi, Helvetische Reliefsigillaten und die Rolle der Werkstatt Bern-Enge
Creators: name: Riedel, Matthias
Publisher: name: Bonner Jahrbücher
Year: 2020

description: Rezension zu: Elisabeth Ettlinger und Katrin Roth-Rubi, Helvetische Reliefsigillaten und die Rolle der Werkstatt Bern-Enge. Acta Bernensia 8. Verlag Stämpfli & Cie, Bern 1979. 136 Seiten mit zahlreichen Abbildungen und 37 Tafeln, davon eine farbig, eine Karte.
description: Bonner Jahrbücher, Bd. 182.1982: Bonner Jahrbücher
Powder-bed 3D printing meets orthopedic rehabilitation devices
Creators: name: Mehdipour, Fatemeh
name: Shirzadi Jahromi, Hassan
Publisher: name: Transactions on Additive Manufacturing Meets Medicine
Year: 2021

description: In order to assist or restore the missing mobility, orthoses must be produced based on the specific anatomy and therapeutic needs of the particular patient. Powder-bed 3D printing technologies allow rapid and detailed manufacturing of complex structures. Application of powder-bed 3D printing technologies for orthopedic manufacturing makes it possible to produce lightweight, tailorable and reproducible rehabilitation devices. This promising manufacturing technique brings its uncertainties which must be answered before being used. Hence, it is very important to monitor the manufacturing quality and investigate the material behavior of the finished products.
description: Transactions on Additive Manufacturing Meets Medicine, Vol 3 No 1 (2021): Trans. AMMM
Quasiconformal mappings on the Heisenberg group: An overview
Creators: name: Platis, Ioannis D.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: We present a brief overview of the Korányi-Reimann theory of quasiconformal mappings on the Heisenberg group stressing on the analogies as well as on the differences between the Heisenberg group case and the classical two-dimensional case. We examine the extensions of the theory to more general spaces and we state some known results and open problems.
description: 15 pages, some typos and misplacements from the previous version have been corrected. This article will appear in the Handbook of Teichm\"uller Theory, vol. VI (Athanase Papadopoulos, ed.)
Study of levitating nanoparticles using ultracold neutrons
Creators: name: Nesvizhevsky, V. V.
name: Voronin, A. Yu.
name: Lambrecht, A.
name: Reynaud, S.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Physical adsorption of atoms, molecules and clusters on surface is known. It is linked to many phenomena in physics, chemistry, and biology. Usually the studies of adsorption are limited to the particle sizes of up to ~10^2-10^3 atoms. Following a general formalism, we apply it to even larger objects and discover qualitatively new phenomena. A large particle is bound to surface in a deep and broad potential well formed by van der Waals/ Casimir-Polder forces. The well depth is significantly larger than the characteristic thermal energy. Nanoparticles in high-excited bound states form two-dimensional gas of objects quasi-freely traveling along surface. A particularly interesting prediction is small-energy-transfer scattering of UCN on solid/ liquid surfaces covered by such levitating nanoparticles/ nano-droplets. The change in UCN energy is due to the Doppler shift induced by UCN collisions with nanoparticles; the energy change is about as small as the UCN initial energy. We compare theoretical estimations of our model to all relevant existing data and state that they agree quite well. As our theoretical formalism provides robust predictions and the experimental data are rather precise, we conclude that the recently discovered intriguing phenomenon of small heating of UCN in traps is due to their collisions with such levitating nanoparticles. Moreover, this new phenomenon might be relevant to the striking contradiction between results of the neutron lifetime measurements with smallest reported uncertainties as it might cause major false effects in these experiments; thus it affects fundamental conclusions concerning precision checks of unitarity of the Cabibbo-Kobayashi-Maskawa matrix, cosmology, astrophysics. Dedicated measurements of UCN up-scattering on specially prepared surfaces and nanoparticles levitating above them might provide a unique method to study surface potentials.
description: 20 pages, 12 figures
The Ptolemaean Inequality in the closure of complex hyperbolic plane
Creators: name: Platis, Ioannis D.
name: Sönmez, Nilgün
Publisher: name: arXiv
Year: 2016
Subjects: subject: Metric Geometry (math.MG)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53C17, 51M10, 51F99

description: We prove Ptolemaean Inequality and Ptolemaeus' Theorem in the closure complex hyperbolic plane endowed with the Cygan metric.
description: 11 pages
Design and 3D-printing of a rinsing chamber for hydrostatic high-pressure treated allogeneic tissues
Creators: name: Lorenz, Mathias
name: Drobek, Christoph
name: Schwerdt, Daniela
name: Bader, Rainer
name: Seitz, Hermann
Publisher: name: Transactions on Additive Manufacturing Meets Medicine
Year: 2021

description: Nowadays, the use of additive manufacturing processes is widespread in the area of medical applications due to the advantages such as the wide variety of materials and the flexibility regarding the unique or single-part production to fabricate, for example, implants, surgical devices and guides as well as prostheses. As part of a joint project, our research groups have developed a rinsing system for allogeneic tissues and printed all relevant components by using stereolithography. The results presented in this scientific work show the use of this technology to fabricate biocompatible and steam sterilizable chambers and tissue holders for the rinsing system.
description: Transactions on Additive Manufacturing Meets Medicine, Vol 3 No 1 (2021): Trans. AMMM