cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Energy optimization of gas–liquid dispersion in micronozzles assisted by design of experiment
Creators: name: Reichmann, Felix
name: Varel, Fabian
name: Kockmann, Norbert
Publisher: name: Technische Universität Dortmund
Year: 2017
Subjects: subject: Gas–liquid capillary flow
subject: High interfacial area
subject: Bubble breakup
subject: Micronozzle bubble dispersion
subject: Energy dissipation rate
subject: Energy efficacy
subject: 660

description: In recent years gas-liquid flow in microchannels has drawn much attention in the research fields of analytics and applications, such as in oxidations or hydrogenations. Since surface forces are increasingly important on the small scale, bubble coalescence is detrimental and leads to Taylor bubble flow in microchannels with low surface-to-volume ratio. To overcome this limitation, we have investigated the gas–liquid flow through micronozzles and, specifically, the bubble breakup behind the nozzle. Two different regimes of bubble breakup are identified, laminar and turbulent. Turbulent bubble breakup is characterized by small daughter bubbles and narrow daughter bubble size distribution. Thus, high interfacial area is generated for increased mass and heat transfer. However, turbulent breakup mechanism is observed at high flow rates and increased pressure drops; hence, large energy input into the system is essential. In this work Design of Experiment assisted evaluation of turbulent bubbly flow redispersion is carried out to investigate the effect and significance of the nozzle’s geometrical parameters regarding bubble breakup and pressure drop. Here, the hydraulic diameter and length of the nozzle show the largest impacts. Finally, factor optimization leads to an optimized nozzle geometry for bubble redispersion via a micronozzle regarding energy efficacy to attain a high interfacial area and surface-to-volume ratio with rather low energy input.
description: Processes;Vol. 5 (4), p 57-
Blind spots for direct detection with simplified DM models and the LHC
Creators: name: Choudhury, Arghya
name: Kowalska, Kamila
name: Roszkowski, Leszek
name: Sessolo, Enrico Maria
name: Williams, Andrew J.
Publisher: name: Technische Universität Dortmund
Year: 2017
Subjects: subject: Dark matter
subject: Simplified models
subject: Direct detection
subject: Blind spots
subject: LHC
subject: 530
subject: Dunkle Materie
subject: Detektion
subject: Toter Winkel
subject: LHC

description: Using the existing simplified model framework, we build several dark matter models which have suppressed spin-independent scattering cross section. We show that the scattering cross section can vanish due to interference effects with models obtained by simple combinations of simplified models. For weakly interacting massive particle (WIMP) masses ≳10 GeV, collider limits are usually much weaker than the direct detection limits coming from LUX or XENON100. However, for our model combinations, LHC analyses are more competitive for some parts of the parameter space. The regions with direct detection blind spots can be strongly constrained from the complementary use of several Large Hadron Collider (LHC) searches like mono-jet, jets + missing transverse energy, heavy vector resonance searches, etc. We evaluate the strongest limits for combinations of scalar + vector, “squark” + vector, and scalar + “squark” mediator, and present the LHC 14 TeV projections.
description: Universe;3(2)
Exact rotating membrane solutions on a G_2 manifold and their semiclassical limits
Creators: name: Bozhilov, P.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We obtain exact rotating membrane solutions and explicit expressions for the conserved charges on a manifold with exactly known metric of G_2 holonomy in M-theory, with four dimensional N=1 field theory dual. After that, we investigate their semiclassical limits and derive different relations between the energy and the other conserved quantities, which is a step towards M-theory lift of the semiclassical string/gauge theory correspondence for N=1 field theories.
description: LaTeX, 31 pages, no figures; V2: references added; V3: 34 pages; explanations, comments, acknowledgments and references added; V4: final version, to appear in JHEP
title: The supply chain optimization and integration and their role in ports efficiency and function
title: Πως επηρεάζεται η απόδοση λειτουργίας του λιμανιού από την βελτιστοποίηση της αλυσίδας εφοδιασμού
titleType: AlternativeTitle
Creators: name: Tselepis, Matthaios
name: Τσελέπης, Ματθαίος
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2020
Subjects: subject: Supply chain
subject: Ports
subject: Efficiency
subject: Integration
subject: Porter SCMT

description: Αυτή η διατριβή στοχεύει πρωτίστως στην εξέταση των λογικών σχέσεων μεταξύ των στρατηγικών ολοκλήρωσης των τερματικών λιμένων μαζί με τις διαδικασίες και τις στρατηγικές της αλυσίδας εφοδιασμού, καθώς και τα προηγούμενα και τις συνέπειες των στρατηγικών ολοκλήρωσης. Σε αυτήν τη διατριβή, η στρατηγική ολοκλήρωσης ονομάζεται Port Supply Chain Integration (PSCI) και τα προηγούμενα και οι συνέπειες του PSCI αναγνωρίστηκαν και ορίστηκαν ως Port Performance (PP). Η ανάλυση αυτής της διατριβής αναπτύσσεται σε ένα μοντέλο τεσσάρων κατευθύνσεων, όπου κάθε μέρος καλύπτει μια διαφορετική διάσταση της ανάλυσης σχετικά με την επίδραση της βελτιστοποίησης και ολοκλήρωσης της αλυσίδας εφοδιασμού όσον αφορά την αποτελεσματικότητα και τη λειτουργία των λιμένων.
The effect of machined surface conditioning on the coating interface of high velocity oxygen fuel (HVOF) sprayed coating
Creators: name: Tilger, Meik
name: Biermann, Dirk
name: Abdulgader, Mohamed
name: Tillmann, Wolfgang
Publisher: name: Technische Universität Dortmund
Year: 2019
Subjects: subject: Surface integrity
subject: Machining
subject: Turning
subject: Honing
subject: Coating
subject: Topography
subject: 620
subject: 670
subject: Oberflächenstruktur
subject: Spanende Bearbeitung
subject: Drehen
subject: Honen
subject: Beschichtung
subject: Oberflächenfeingestalt

description: Roughening the substrate surface is essential for thermal sprayed coatings. In this regard, sandblasting has established itself as an easy to use surface conditioning procedure. The quality of the obtained roughness depends on the conditions of the sandblasting material, adjusted parameters, and the kind of the process execution (manual or mechanical). These preconditions limit the reproducibility of the roughness obtained. Sandblasting causes residual compressive stress and may also lead to the inclusion of sand particles and notches in the roughened surface, which affects the interfacial properties of the coating, as well as the flexural strength of the coated parts. The hardness of the roughened surface plays, thereby, an important role. However, in order to reliably avoid these effects, microfinishing can be used as an alternative to generate a homogenous roughened substrate surface, control the induced residual stresses, and increase the reproducibility. In addition, the roughened surface pattern can be produced during the chip forming process of the to-be-coated parts. The utilization of the appropriate combination of machining processes and parameters should lead to the required surface pattern and thus to an enhanced coating adhesion and flexural strength of the coated part. The induced residual stresses and the quality of the obtained surface roughness have a significant influence on the coating adhesion and the lifespan of the coated parts. This paper aims to analyze, as a first step, the effect of the turning and microfinishing on the surface conditioning of the bearing steel 100Cr6 (AISI 52100). The investigation concludes by comparing the microfinished with the sandblasted surfaces with regard to the interface to and the adhesion of the WC–Co high velocity oxygen fuel (HVOF) sprayed coatings on them. Surface conditioning plays a decisive role by the induced residual stresses and the elimination of adhesion defects.
description: J. Manuf. Mater. Process.;3(3)
Eta bound states in nuclei: a probe of flavour-singlet dynamics
Creators: name: Bass, Steven D.
name: Thomas, Anthony W.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We argue that eta bound states in nuclei are sensitive to the singlet component in the eta. The bigger the singlet component, the more attraction and the greater the binding. Thus, measurements of eta bound states will yield new information about axial U(1) dynamics and glue in mesons. Eta - etaprime mixing plays an important role in understanding the value of the eta-nucleon scattering length.
description: 8 pages, version to appear in PLB
Lyapunov coefficients for monodromic tangential singularities in Filippov vector fields
Creators: name: Novaes, Douglas D.
name: Silva, Leandro A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 34C23, 34A36, 37G15

description: In planar analytic vector fields, a monodromic singularity can be distinguished between a focus or a center by means of the Lyapunov coefficients, which are given in terms of the power series coefficients of the first-return map defined around the singularity. In this paper, we are interested in an analogous problem for monodromic tangential singularities of piecewise analytic vector fields $Z=(Z^+ ,Z^-)$. First, we prove that the first-return map, defined in a neighborhood of a monodromic tangential singularity, is analytic, which allows the definition of the Lyapunov coefficients. Then, as a consequence of a general property for pair of involutions, we obtain that the index of the first non-vanishing Lyapunov coefficient is always even. In addition, a general recursive formula together with a Mathematica algorithm for computing the Lyapunov coefficients is obtained. We also provide results regarding limit cycles bifurcating from monodromic tangential singularities. Several examples are analyzed.
Damage tolerance evaluation of E-PBF manufactured Inconel 718 strut geometries by advanced characterization techniques
Creators: name: Kotzem, Daniel
name: Arold, Tizian
name: Niendorf, Thomas
Publisher: name: Technische Universität Dortmund
Year: 2020
Subjects: subject: Electron beam powder bed fusion (E-PBF)
subject: Inconel 718
subject: Damage tolerance
subject: Lattice structures
subject: Cyclic behavior
subject: Defect analysis
subject: 660
subject: Rapid Prototyping
subject: Inconel 718
subject: Schadenstoleranz
subject: Fehleranalyse

description: By means of electron beam powder bed fusion (E-PBF), highly complex lightweight structures can be manufactured within short process times. Due to the increasing complexity of producible components and the entangled interplay of damage mechanisms, common bulk material properties such as ultimate tensile or fatigue strength are not sufficient to guarantee safe and reliable use in demanding applications. Within this work, the damage tolerance of E-PBF-manufactured Ni-based alloy Inconel 718 (IN 718) strut geometries under uniaxial cyclic loading was investigated supported by several advanced measurement techniques. Based on thermal and electrical measurements, the failure of single struts could reliably be detected, revealing that continuous monitoring is applicable for such complex geometries. Process-induced surface roughness was found to be the main reason for early failure during cyclic loading. Thus, adequate post-processing steps have to be established for complex geometries to significantly improve damage tolerance and, eventually, in-service properties.
description: Materials;2020, 13(1), 247
Fairness constraints can help exact inference in structured prediction
Creators: name: Bello, Kevin
name: Honorio, Jean
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (stat.ML)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Many inference problems in structured prediction can be modeled as maximizing a score function on a space of labels, where graphs are a natural representation to decompose the total score into a sum of unary (nodes) and pairwise (edges) scores. Given a generative model with an undirected connected graph $G$ and true vector of binary labels, it has been previously shown that when $G$ has good expansion properties, such as complete graphs or $d$-regular expanders, one can exactly recover the true labels (with high probability and in polynomial time) from a single noisy observation of each edge and node. We analyze the previously studied generative model by Globerson et al. (2015) under a notion of statistical parity. That is, given a fair binary node labeling, we ask the question whether it is possible to recover the fair assignment, with high probability and in polynomial time, from single edge and node observations. We find that, in contrast to the known trade-offs between fairness and model performance, the addition of the fairness constraint improves the probability of exact recovery. We effectively explain this phenomenon and empirically show how graphs with poor expansion properties, such as grids, are now capable to achieve exact recovery with high probability. Finally, as a byproduct of our analysis, we provide a tighter minimum-eigenvalue bound than that of Weyl's inequality.
description: 10pages, 3 figures
title: Planners between the chairs
title: How planners (do not) adapt to transformative practice
titleType: AlternativeTitle
Creators: name: Othengrafen, Frank
name: Levin-Keitel, Meike
Publisher: name: Technische Universität Dortmund
Year: 2019
Subjects: subject: Cluster analysis
subject: Planning practice
subject: Role of planners
subject: Transformative practices
subject: Urban planning
subject: 710
subject: Stadtplanung
subject: Stadtplaner
subject: Stadtplanerin
subject: Cluster-Analyse
subject: Transformation
subject: Innovation

description: Even though the turn to practice is widely accepted in the field of urban planning, the practices of planners are empirically largely unexplored. Looking at the daily routines and practices of urban planners thus allows a deeper insight into what planning is, and how planning practices are related to innovation and transformation. To do so, we start from the assumption that behaviour is a constellation of practices, including certain activities, a set of choices and actions, patterns of behaviour or forms of interaction that is organised in a certain space or context by common understandings and rules. By conducting an online survey among planners in medium-sized German cities, we first identified a wide range of planning practices and activities in general. In a second step, we conducted a statistical cluster analysis resulting in six types of planners: (1) the ‘local-specific analysts,’ (2) the ‘experienced generalists,’ (3) the ‘reactive pragmatists,’ (4) the ‘project-oriented planners,’ (5) the ‘compensatory moderators,’ and (6) the ‘innovative designers.’ Each cluster has specific practices and activities, linked to characteristic value-sets, role interpretations and self-perceptions that might help explain the differences with regard to innovation and transformation. From the identified six groups or clusters of planners, only two clusters more or less consequently aim at innovation, experimentation and new approaches. One cluster is dedicated to collaborative practices whereas traditional practices predominate in three clusters at least, mainly because of legal requirements. This is the result of an increasing ‘formalisation’ of land-use planning, making planners focus on technical and formal practices, and, at the same time, lead to the reduced ‘attention’ to and implementation of conceptual approaches or ‘necessary’ transformative practices, including proactive approaches and strategic coordination with regard to sustainable urban development, but also comprising experiments, real labs or social innovations.
description: Urban planning;Vol 4, No 4 (2019)
Rare Charm Decays
Creators: name: Pakvasa, Sandip
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Rare FCNC decay modes of charmed mesons are reviewed. The standard model predictions, including both short and long distance contributions, are summarized. Several new physics options that can give detectable signals are described.
description: 4 pages. Presented at the 6th International Conference on Hyperons, Charm and Beauty Hadrons, IIT, Chicago, june 27-july 3, 2004. To be published in the Proceedings
Άσκηση ηγεσίας στον τουριστικό κλάδο - Μελέτη περίπτωσης
Creators: name: Καπόλος, Νικόλαος
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2020
Subjects: subject: Ηγεσία
subject: Τουριστικός κλάδος
subject: Μελέτη περίπτωσης

description: Στο σύγχρονο, διαρκώς μεταβαλλόμενο, επιχειρηματικό περιβάλλον, η έννοια της ηγεσίας αποκτά ολοένα και μεγαλύτερη βαρύτητα. Το ιδανικό μοντέλο ηγεσίας αποβάλλει την ηγεμονική συμπεριφορά του εργοδότη – manager και θέτει στο προσκήνιο το πρότυπο του ηγέτη με συναισθηματική νοημοσύνη και χαρισματική προσωπικότητα. Ο ηγέτης, αυτός, διακατέχεται από ένα όραμα, το όποιο επιδιώκει να μεταλαμπαδεύσει στα υπόλοιπα μέλη του οργανισμού. Ο ηγέτης χρησιμοποιεί το Χαρισματικό χαρακτήρα του για να εμπνεύσει και να κερδίζει την εμπιστοσύνη και το σεβασμό του προσωπικού αλλά και την ηθική στήριξή τους στο πρόσωπό του. Κατέχει, επίσης, Διανοητική Διέγερση που τον βοηθά να κατανοεί τις απόψεις και τις ιδέες του προσωπικού. Επίσης, το Εξατομικευμένο ενδιαφέρον τον καθιστά μέντορα, αφού αφουγκράζεται τους προβληματισμούς του κάθε υφισταμένου και τους παρακινεί να αναπτύξουν τις ικανότητές τους. Όλα τα παραπάνω χαρακτηριστικά ηγεσίας διαμορφώνουν το προφίλ του Μετασχηματιστικού Ηγέτη, το οποίο αναλύεται στην παρούσα διπλωματική εργασία. Στη συγκεκριμένη εργασία χρησιμοποιείται η μέθοδος της μελέτης περίπτωσης για την “ΞΕΝΟΔΟΧΕΙΑΚΕΣ ΕΠΙΧΕΙΡΗΣΕΙΣ Α.Ε”. Περιγράφεται η οργανωτική δομή και ο καταμερισμός εργασιών, ενώ πιο στοχευμένα παρουσιάζεται πως μέσω της μετασχηματιστικής ηγεσίας μια επιχείρηση μπορεί να ωθηθεί στην κορυφή του τουριστικού κλάδου.
The Possible Interpretations of Y(4260)
Creators: name: Zhu, Shi-Lin
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: The recently observed Y(4260) lies far above the decay threshold with a width less than 100 MeV. We argue that it's very difficult to accommodate Y(4260) as a conventional $c\bar c$ radial excitation or a D-wave state. It can't be a hadronic molecule. Its production mechanism and special decay pattern do not favor the glueball interpretation. If Y(4260) is a scalar tetraquark, it must be produced by the I=0 component of the virtual photon. Then the $I=1, I_z=0$ component of the virtual photon should have produced its isovector partner $Y^\prime (4260)$, which may be searched for in the decay channel $π^+π^-π^0 J/ψ$ using exactly the same database from the initial state radiation process. The observation/non-observation of $Y^\prime (4260)$ can easily confirm/reject the tetraquark hypothesis. However, a tetraquark far above threshold can fall apart into $D\bar D, D^\ast\bar D$ very easily. Its not-so-large width and the non-observation of $D\bar D$ mode tend to disfavor the tetraquark hypothesis. Hence the only feasible interpretation is a hybrid charmonium if Y(4260) is {\sl NOT} an experimental artifact. At present, none of the experimental information from BABAR measurement is in conflict with the hybrid charmonium picture.
description: some references added
title: Der Einfluss der Europäischen Union auf städtische Klimapolitik. Eine Analyse der Rolle motivationaler Faktoren
Creators: name: Hofmeister, Anne
Publisher: name: UNSPECIFIED
Year: 2022

description: Städte stehen im Zentrum vieler politischer Herausforderungen und bieten ein großes Problemlösungspotential. Dies gilt in besonderem Maße für das Problem des Klimawandels. Die Arbeit untersucht den Einfluss der Europäischen Union auf städtische Klimapolitik und analysiert dabei die Rolle motivationaler Faktoren. Dabei werden Ansätze der Europaforschung und der lokalen Politikforschung verknüpft. Es wird gezeigt, dass die Berücksichtigung der Wahrnehmung der Akteure und ihrer Handlungsorientierungen einen wichtigen Beitrag zur Erfassung der gesamten Bandbreite des möglichen Einflusses von EU-Impulsen leistet.
Screening and identification of novel cGAS homologues using a combination of in vitro and in vivo protein synthesis
Creators: name: Rolf, Jascha
name: Siedentop, Regine
name: Lütz, Stephan
name: Rosenthal, Katrin
Publisher: name: Technische Universität Dortmund
Year: 2019
Subjects: subject: cGAS
subject: Nucleotidyltransferase
subject: cGAMP
subject: STING
subject: Enzyme screening
subject: CFPS
subject: TXTL
subject: Heterologous proteins
subject: 660

description: The cyclic GMP-AMP synthase (cGAS) catalyzes the synthesis of the multifunctional second messenger, cGAMP, in metazoans. Although numerous cGAS homologues are predicted in protein databases, the catalytic activity towards cGAMP synthesis has been proven for only four of them. Therefore, we selected five novel and yet uncharacterized cGAS homologues, which cover a broad range in the field of vertebrates. Cell-free protein synthesis (CFPS) was used for a pre-screening to investigate if the cGAS genes originating from higher organisms can be efficiently expressed in a bacterial expression system. As all tested cGAS variants were expressible, enzymes were synthesized in vivo to supply higher amounts for a subsequent in vitro activity assay. The assays were carried out with purified enzymes and revealed vast differences in the activity of the homologues. For the first time, the cGAS homologues from the Przewalski’s horse, naked mole-rat, bald eagle, and zebrafish were proven to catalyze the synthesis of cGAMP. The extension of the list of described cGAS variants enables the acquisition of further knowledge about the structural and molecular mechanism of cGAS, potentially leading to functional improvement of the enzyme.
description: International Journal of Molecular Sciences;2020, 21(1), 105
Beyond In-Flight Service: The Strategic Role of Flight Attendants in the Safety and Efficiency of Modern Aviation
Creators: name: Hwang, Bitt
Publisher: name: Zenodo
Year: 2025

description: This opinion article explores the critical and often overlooked role of flight attendants beyond traditional in-flight service. Drawing from the author's personal experience with leading international airlines like Qatar Airways and Tigerair, it reveals how flight attendants function as essential safety professionals, crisis managers, and cultural mediators in the highly complex environment of modern aviation. The article highlights the value of technical training, international exposure, multilingualism, and accumulated flight experience in enhancing both passenger safety and airline operational efficiency. The piece advocates for the recognition of flight attendants as strategic assets in aviation, particularly in high-stakes scenarios, such as emergency landings and multinational passenger interactions.
Swapping and permutation operators as entanglement witnesses for quantum Heisenberg spin-$s$ systems
Creators: name: Zhang, Guang-Ming
name: Wang, Xiaoguang
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: Astrophysics (astro-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Using the SU($N$) representation of the group theory, we derive the general form of the spin swapping operator for the quantum Heisenberg spin-$s$ systems. We further prove that such a spin swapping operator is equal to the spin singlet pairing operator under the partial transposition. For SU(2) invariant states, it is shown that the expectation value of the spin swapping operator and its generalizations, the permutations, can be used as an entanglement witness, especially, for the formulation of observable conditions of entanglement.
description: 8 pages, no figures, accepted by Journal of Physics A: Mathematical and General
In vivo simulation of magnesium degradability using a new fluid dynamic bench testing approach
Creators: name: Jung, Ole
name: Porchetta, Dario
name: Schroeder, Marie-Luise
name: Klein, Martin
name: Wegner, Nils
name: Walther, Frank
name: Feyerabend, Frank
name: Barbeck, Mike
name: Kopp, Alexander
Publisher: name: Technische Universität Dortmund
Year: 2019
Subjects: subject: Bioreactor
subject: Magnesium
subject: Degradation
subject: Plasma electrolytic oxidation (PEO)
subject: 660
subject: Bioreaktor
subject: Magnesium
subject: Biologischer Abbau
subject: Elektrochemische Oxidation

description: The degradation rate of magnesium (Mg) alloys is a key parameter to develop Mg-based biomaterials and ensure in vivo-mechanical stability as well as to minimize hydrogen gas production, which otherwise can lead to adverse effects in clinical applications. However, in vitro and in vivo results of the same material often differ largely. In the present study, a dynamic test bench with several single bioreactor cells was constructed to measure the volume of hydrogen gas which evolves during magnesium degradation to indicate the degradation rate in vivo. Degradation medium comparable with human blood plasma was used to simulate body fluids. The media was pumped through the different bioreactor cells under a constant flow rate and 37 °C to simulate physiological conditions. A total of three different Mg groups were successively tested: Mg WE43, and two different WE43 plasma electrolytically oxidized (PEO) variants. The results were compared with other methods to detect magnesium degradation (pH, potentiodynamic polarization (PDP), cytocompatibility, SEM (scanning electron microscopy)). The non-ceramized specimens showed the highest degradation rates and vast standard deviations. In contrast, the two PEO samples demonstrated reduced degradation rates with diminished standard deviation. The pH values showed above-average constant levels between 7.4–7.7, likely due to the constant exchange of the fluids. SEM revealed severe cracks on the surface of WE43 after degradation, whereas the ceramized surfaces showed significantly decreased signs of corrosion. PDP results confirmed the improved corrosion resistance of both PEO samples. While WE43 showed slight toxicity in vitro, satisfactory cytocompatibility was achieved for the PEO test samples. In summary, the dynamic test bench constructed in this study enables reliable and simple measurement of Mg degradation to simulate the in vivo environment. Furthermore, PEO treatment of magnesium is a promising method to adjust magnesium degradation.
description: Int. J. Mol. Sci.;20(19)
On the Moduli Space of the Cascading SU(M+p)xSU(p) Gauge Theory
Creators: name: Dymarsky, Anatoly
name: Klebanov, Igor R.
name: Seiberg, Nathan
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We carry out a thorough analysis of the moduli space of the cascading gauge theory found on p D3-branes and M wrapped D5-branes at the tip of the conifold. We find various mesonic branches of the moduli space whose string duals involve the warped deformed conifold with different numbers of mobile D3-branes. The branes that are not mobile form a BPS bound state at threshold. In the special case where p is divisible by M there also exists a one-dimensional baryonic branch whose family of supergravity duals, the resolved warped deformed conifolds, was constructed recently. The warped deformed conifold is a special case of these backgrounds where the resolution parameter vanishes and a Z_2 symmetry is restored. We study various brane probes on the resolved warped deformed conifolds, and successfully match the results with the gauge theory. In particular, we show that the radial potential for a D3-brane on this space varies slowly, suggesting a new model of D-brane inflation.
description: 55 pages, 8 figures; v2: minor corrections; v3: added comments in section 15
Nanoparticle classification using frequency domain analysis on resource-limited platforms
Creators: name: Yayla, Mikail
name: Toma, Anas
name: Chen, Kuan-Hsun
name: Lenssen, Jan Eric
name: Shpacovitch, Victoria
name: Hergenröder, Roland
name: Weichert, Frank
name: Chen, Jian-Jia
Publisher: name: Technische Universität Dortmund
Year: 2019
Subjects: subject: Nanoparticles
subject: Frequency domain analysis
subject: Mobile sensors
subject: PAMONO biosensor
subject: Surface plasmon resonance
subject: Embedded systems
subject: 004
subject: Nanopartikel
subject: Frequenzbereich
subject: Biosensor
subject: Oberflächenplasmonresonanz
subject: Eingebettetes System

description: A mobile system that can detect viruses in real time is urgently needed, due to the combination of virus emergence and evolution with increasing global travel and transport. A biosensor called PAMONO (for Plasmon Assisted Microscopy of Nano-sized Objects) represents a viable technology for mobile real-time detection of viruses and virus-like particles. It could be used for fast and reliable diagnoses in hospitals, airports, the open air, or other settings. For analysis of the images provided by the sensor, state-of-the-art methods based on convolutional neural networks (CNNs) can achieve high accuracy. However, such computationally intensive methods may not be suitable on most mobile systems. In this work, we propose nanoparticle classification approaches based on frequency domain analysis, which are less resource-intensive. We observe that on average the classification takes 29 μ s per image for the Fourier features and 17 μ s for the Haar wavelet features. Although the CNN-based method scores 1–2.5 percentage points higher in classification accuracy, it takes 3370 μ s per image on the same platform. With these results, we identify and explore the trade-off between resource efficiency and classification performance for nanoparticle classification of images provided by the PAMONO sensor.
description: Sensors;19(19)
title: Γαστροοισοφαγική παλινδρόμηση και ποιότητα ζωής
title: Gastroesophageal reflux disease and quality of life
titleType: AlternativeTitle
Creators: name: Τζώρτζα, Ζωή
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2020
Subjects: subject: Γαστροοισοφαγική παλινδρόμηση
subject: Ποιότητα ζωής
subject: EQ5D
subject: Υγεία
subject: Gastroesophageal reflux disease

description: Η νόσος της γαστροοισοφαγικής παλινδρόμησης (ΓΟΠΝ) αποτελεί μία απο τις συχνότερες διαταραχές του γαστρεντερικού συστήματος. Χαρακτηρίζεται απο τη παλινδρόμηση οξέος απο το στομάχι προς τον οισοφάγο, εκδηλώνεται με διάφορα οισοφαγικά και εξωοοισοφαγικά συμπτώματα που δυσχεραίνουν τη καθημερινότητα των ασθενών και προκαλεί επιπλοκές που μπορεί να οδηγήσουν σε καρκίνο του οισοφάγου.
Blended Multi-Modal Deep ConvNet Features for Diabetic Retinopathy Severity Prediction
Creators: name: Bodapati, J. D.
name: Veeranjaneyulu, N.
name: Shareef, S. N.
name: Hakak, S.
name: Bilal, M.
name: Maddikunta, P. K. R.
name: Jo, O.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences
subject: I.4.7; I.5; I.2.10; G.3
subject: 68T10, 62H30

description: Diabetic Retinopathy (DR) is one of the major causes of visual impairment and blindness across the world. It is usually found in patients who suffer from diabetes for a long period. The major focus of this work is to derive optimal representation of retinal images that further helps to improve the performance of DR recognition models. To extract optimal representation, features extracted from multiple pre-trained ConvNet models are blended using proposed multi-modal fusion module. These final representations are used to train a Deep Neural Network (DNN) used for DR identification and severity level prediction. As each ConvNet extracts different features, fusing them using 1D pooling and cross pooling leads to better representation than using features extracted from a single ConvNet. Experimental studies on benchmark Kaggle APTOS 2019 contest dataset reveals that the model trained on proposed blended feature representations is superior to the existing methods. In addition, we notice that cross average pooling based fusion of features from Xception and VGG16 is the most appropriate for DR recognition. With the proposed model, we achieve an accuracy of 97.41%, and a kappa statistic of 94.82 for DR identification and an accuracy of 81.7% and a kappa statistic of 71.1% for severity level prediction. Another interesting observation is that DNN with dropout at input layer converges more quickly when trained using blended features, compared to the same model trained using uni-modal deep features.
description: 18 pages, 8 figures, published in Electronics MDPI journal
The G protein-coupled bile acid receptor TGR5 (Gpbar1) modulates endothelin-1 signaling in liver
Creators: name: Klindt, Caroline
name: Reich, Maria
name: Hellwig, Birte
name: Stindt, Jan
name: Rahnenführer, Jörg
name: Hengstler, Jan G.
name: Köhrer, Karl
name: Schoonjans, Kristina
name: Häussinger, Dieter
name: Keitel, Verena
Publisher: name: Technische Universität Dortmund
Year: 2019
Subjects: subject: Bile acids
subject: Endothelin-1
subject: Sinusoidal endothelial cells
subject: Hepatic stellate cells
subject: Portal hypertension
subject: 310

description: TGR5 (Gpbar1) is a G protein-coupled receptor responsive to bile acids (BAs), which is expressed in different non-parenchymal cells of the liver, including biliary epithelial cells, liver-resident macrophages, sinusoidal endothelial cells (LSECs), and activated hepatic stellate cells (HSCs). Mice with targeted deletion of TGR5 are more susceptible towards cholestatic liver injury induced by cholic acid-feeding and bile duct ligation, resulting in a reduced proliferative response and increased liver injury. Conjugated lithocholic acid (LCA) represents the most potent TGR5 BA ligand and LCA-feeding has been used as a model to rapidly induce severe cholestatic liver injury in mice. Thus, TGR5 knockout (KO) mice and wildtype (WT) littermates were fed a diet supplemented with 1% LCA for 84 h. Liver injury and gene expression changes induced by the LCA diet revealed an enrichment of pathways associated with inflammation, proliferation, and matrix remodeling. Knockout of TGR5 in mice caused upregulation of endothelin-1 (ET-1) expression in the livers. Analysis of TGR5-dependent ET-1 signaling in isolated LSECs and HSCs demonstrated that TGR5 activation reduces ET-1 expression and secretion from LSECs and triggers internalization of the ET-1 receptor in HSCs, dampening ET-1 responsiveness. Thus, we identified two independent mechanisms by which TGR5 inhibits ET-1 signaling and modulates portal pressure.
description: Cells;8(11)
Investigation of the tribofilm formation of HiPIMS sputtered MoSx thin films in different environments by Raman scattering
Creators: name: Tillmann, Wolfgang
name: Wittig, Alexandra
name: Stangier, Dominic
name: Thomann, Carl-Arne
name: Moldenhauer, Henning
name: Debus, Jörg
name: Aurich, Daniel
name: Brümmer, Andreas
Publisher: name: Technische Universität Dortmund
Year: 2019
Subjects: subject: MoSx
subject: Third body particles
subject: Tribological behavior
subject: Surface pressure
subject: Sliding velocity
subject: Environment
subject: Raman scattering
subject: 620
subject: 670
subject: MOS
subject: Tribologie
subject: Flächenpressung
subject: Oberflächenverstärkter Raman-Effekt

description: Understanding the generation of third body particles and their contribution to the formation of tribofilms of MoSx thin films is still challenging due to a large number of influencing factors. Besides the structure of the as-deposited MoSx films, the environment and the conditions during the Ball-on-disk tests affect tribofilms and thus the friction. Therefore, the influence of the surface pressure and sliding velocity in air, argon and nitrogen environments on the generation of the third body particles and the tribofilm formation of randomly oriented MoSx films is investigated. A high surface pressure is one major factor to achieve low friction, especially under humid conditions, which is important considering the use in industrial applications, for example dry-running screw machines. However, the mechanisms leading to that frictional behavior are still affected by the surrounding environment. While low friction is caused by a more extensive tribofilm formation in air, in argon and nitrogen, large size third body particles dispensed all over the contact area contribute to a lower friction. Raman scattering reveal a different chemistry of these particles reflected in the absence of laser- or temperature-induced surface oxidation compared to the as-deposited film and the wear track. The Raman scattering results are discussed with respect to the wear particle size, its chemical reactivity and strain-induced bonding changes.
description: Lubricants;7(11)
DOES PROXIMITY TO A GOLF COURSE MATTER?
Creators: name: Owusu-Edusei, Kwame
name: Espey, Molly
name: Owusu-Edusei, Kwame
name: Espey, Molly
Publisher: name: Unknown
Year: 2003
Subjects: Land Economics/Use

description: In this study, we augment an earlier study by estimating the effect of golf courses on housing values using a data set of single-family homes sold between 1994 and 2000. We find that there is generally a positive impact on houses proximate to open space (golf courses and neighborhood parks). The value of proximity to a golf course is found to be greater than figures reported in previous studies. Proximity impacts extend beyond abutting properties and go as far as to those within almost a quarter of a mile. The value of properties proximate to parks is found to be significant and varies with park size and type. Parks classified as small and medium had positive impacts extending over a quarter of a mile with the small parks having the greatest impact on the value of properties.
Binding properties and evolution of homodimers in protein-protein interaction networks
Creators: name: Ispolatov, Iaroslav
name: Yuryev, Anton
name: Mazo, Ilya
name: Maslov, Sergei
Publisher: name: arXiv
Year: 2005
Subjects: subject: Genomics (q-bio.GN)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Molecular Networks (q-bio.MN)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: We demonstrate that Protein-Protein Interaction (PPI) networks in several eucaryotic organisms contain significantly more self-interacting proteins than expected if such homodimers randomly appeared in the course of the evolution. We also show that on average homodimers have twice as many interaction partners than non-self-interacting proteins. More specifically the likelihood of a protein to physically interact with itself was found to be proportional to the total number of its binding partners. These properties of dimers are are in agreement with a phenomenological model in which individual proteins differ from each other by the degree of their ``stickiness'' or general propensity towards interaction with other proteins including oneself. A duplication of self-interacting proteins creates a pair of paralogous proteins interacting with each other. We show that such pairs occur more frequently than could be explained by pure chance alone. Similar to homodimers, proteins involved in heterodimers with their paralogs on average have twice as many interacting partners than the rest of the network. The likelihood of a pair of paralogous proteins to interact with each other was also shown to decrease with their sequence similarity. This all points to the conclusion that most of interactions between paralogs are inherited from ancestral homodimeric proteins, rather than established de novo after the duplication. We finally discuss possible implications of our empirical observations from functional and evolutionary standpoints.
description: 16 pages, 3 figures
Gravity Dual of Connes Cocycle Flow
Creators: name: Bousso, Raphael
name: Chandrasekaran, Venkatesa
name: Rath, Pratik
name: Shahbazi-Moghaddam, Arvin
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We define the "kink transform" as a one-sided boost of bulk initial data about the Ryu-Takayanagi surface of a boundary cut. For a flat cut, we conjecture that the resulting Wheeler-DeWitt patch is the bulk dual to the boundary state obtained by Connes cocycle (CC) flow across the cut. The bulk patch is glued to a precursor slice related to the original boundary slice by a one-sided boost. This evades ultraviolet divergences and distinguishes our construction from one-sided modular flow. We verify that the kink transform is consistent with known properties of operator expectation values and subregion entropies under CC flow. CC flow generates a stress tensor shock at the cut, controlled by a shape derivative of the entropy; the kink transform reproduces this shock holographically by creating a bulk Weyl tensor shock. We also go beyond known properties of CC flow by deriving novel shock components from the kink transform.
description: 43 pages, 7 figures
Okonomische Hysterese in der Veredlungsproduktion
Creators: name: Hinrichs, Jan
name: Musshoff, Oliver
name: Odening, Martin
name: Hinrichs, Jan
name: Musshoff, Oliver
name: Odening, Martin
Publisher: name: Unknown
Year: 2005
Subjects: subject: Livestock Production/Industries
subject: Economic Hysteresis
subject: Risk
subject: Real options
subject: Hog production

description: German hog production responds only very limited to price fluctuations in the pork market. The hog production concentrates in a few regions though it does not depend on special natural conditions. Furthermore, the production volume does hardly vary over time. Relatively high market risks, sunk costs, and the flexibility of the decision maker to defer investments characterize decision problems hog production. Thus the real option approach is chosen to explain the inertia in production capacity. Using panel data of specialised hog farms from the German farm accountancy data network (FADN) an empirical investment model is estimated. Formally, the model has the structure of an ordered probit model. This approach allows to test for economic hysteresis in the adjustment of hog production capacity. The results confirm that uncertainty and flexibility widen the optimal range of inaction.
title: Transformations of 'sacredness in stone': religious architecture in urban space in 21st century Germany
title: new perspectives in the study of religious architecture
titleType: AlternativeTitle
Creators: name: Wildt, Kim De
name: Radermacher, Martin
name: Krech, Volkhard
name: Löffler, Beate
name: Sonne, Wolfgang
Publisher: name: Technische Universität Dortmund
Year: 2019
Subjects: subject: Comparative religion
subject: Architectural history
subject: Religious architecture
subject: Architectural semiotics
subject: Urban research
subject: Urban planning
subject: Sacred space
subject: Religious buildings
subject: 720

description: Religious transformations in modern societies are not merely a discursive or demographic phenomenon, they also relate to religious architecture in urban space and affect the built environment at its core. Many churches, for instance, are in the process of reuse, closure, or even demolition. At the same time, there has been an increase in the construction of new mosques and a reorientation in synagogue architecture in Germany for the last twenty-five years. The three religious traditions—Judaism, Christianity, and Islam—undergo remarkable transformations with regard to the design and style of their places of worship. Often, however, these new designs are not easily ‘readable’ to visitors and believers alike. In addition, the role of contemporary religious architecture in its relation to urban space is changing. Which meanings do religious buildings convey, how are they positioned, and how do they structure urban space? In collaboration of the study of religions and architectural history, we approach these questions by means of studying the transformations of contemporary religious architecture in Germany in a comparative manner. We survey Jewish, Christian, and Muslim places of worship, that is, new constructions, reused, and demolished buildings in Germany since 1990. The selected buildings are studied in detail regarding their meaning and positioning in urban space. This article presents findings from an ongoing research project and opens new perspectives in the study of urban religion.
description: Religions;10(11)
Ναυτιλιακοί κύκλοι: η επίδραση της χρηματοοικονομικής κρίσης στην αγορά χύδην ξηρών φορτίων
Creators: name: Σκλαβενίτης, Ευστάθιος
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2020
Subjects: subject: BDI
subject: Οικονομική κρίση
subject: Ναυτιλιακοί κύκλοι
subject: Αγορά χύδην ξηρών φορτίων
subject: Εξωτερικό σοκ

description: Η συγκεκριμένη διπλωματική μας παρουσιάζει, ποιες είναι οι κύριες επιπτώσεις της Χρηματοοικονομικής Κρίσης του 2008 στην ναυλαγορά χύδην ξηρών φορτίων αναλύοντας την διακύμανση των ναύλων την περίοδο από το 2003 έως το 2019. Βασιζόμενοι στην θεωρητική προσέγγιση των ναυτιλιακών κύκλων, εξετάζουμε τις συνέπειες ενός εξωτερικού σοκ για την ναυτιλία χύδην ξηρών φορτίων, δεδομένου ότι μια παγκόσμια οικονομική επιβράδυνση επηρεάζει άμεσα το εμπόριο σε παγκόσμιο επίπεδο. Η ναυτιλία χύδην ξηρών φορτίων ήταν ένας ευάλωτος τομέας λαμβάνοντας υπόψιν τις τεράστιες διακυμάνσεις στην αγορά και στον δείκτη BDI, οι οποίες πήγαζαν από τα υψηλά επίπεδα των ναύλων ανά τόνου φορτίου και των ναύλων χρονοναύλωσεων που καταγράφηκαν από το 2003 έως το 2008. Αποτέλεσμα ήταν να υπάρξει ένας αυξημένος αριθμός παραγγελιών, για ακόμα μεγαλύτερου μεγέθους πλοία καθώς οι πλοιοκτήτες διψούσαν για επενδύσεις με την προοπτική τεράστιων κερδών; εκμεταλλευόμενοι ως εκ τούτου τις οικονομίες κλίμακας και την ευημερούσα ναυλαγορά χύδην ξηρών φορτίων. Όμως, τα πράγματα κύλησαν διαφορετικά υπό την επιρροή της Μεγάλης Ύφεσης, η οποία προκάλεσε τεράστιο χάσμα μεταξύ της ζήτησης και της προσφοράς για μεταφορικές υπηρεσίες. Η συνεχής υπερπροσφορά πλοίων οδήγησε την αγορά των ναύλων χύδην ξηρών φορτίων από την κορυφή στην καταβύθιση και από τότε, οι υψηλές τιμές του 2007-2008 δεν πλησίασαν καν τα ίδια επίπεδα, παρά τον αυξημένο αριθμό διαλύσεων. Αν και επιτεύχθηκε κάποια βελτίωση μετά τα πρώτα χρόνια της κρίσης, όταν ο δείκτης BDI έπεσε στο χαμηλότερο ιστορικά επίπεδο το 2016, αποδείχτηκε ότι η ανάκαμψη θα χρειαστεί τελικά περισσότερο από το αναμενόμενο. Εν κατακλείδι, πέρα από την κύρια ανάλυση, αυτή η μελέτη αποσκοπεί να δώσει έμφαση στα απρόβλεπτα χαρακτηριστικά της ναυτιλιακής βιομηχανίας και στην μεταβλητότητα της αγοράς των ναύλων. Τα αποτελέσματα υποδεικνύουν ότι η πρόβλεψη της ναυλαγοράς και των ναυτιλιακών κύκλων είναι πολύπλοκα θέματα, αφού υπάρχουν πάντα παράγοντες όπως εξωτερικά σοκ, επιβράδυνση του εμπορίου, ατυχήματα, τύχη ή ακόμα και πανδημίες όπως αυτή του Covid-19 σήμερα που μπορούν να ανατρέψουν τα πάντα.