cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Hawking-Page Phase Transition of the four-dimensional de-Sitter Spacetime with non-linear source
Creators: name: Du, Yun-Zhi
name: Li, Huai-Fan
name: Zhang, Li-Chun
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The interplay between a dS black hole and cosmological horizons introduces distinctive thermodynamic behavior in a dS spacetime (for example the well-known upper bounds of mass and entropy in Class. Quant. Grav. 37 (2020) 5). Based on this point, we present the Hawking-Page (HP) phase transition of the four-dimensional dS spacetime with non-linear charge correction when the effective pressure is fixed, and analyze the effects of different effective pressures and non-linear charge corrections on HP phase transition. The evolution of this dS spacetime undergoing the HP phase transition is also investigated. We find that the existent curve of HP phase transition is a closed one with two different branches. That means there exist the upper bounds of the HP temperature and HP pressure, which is completely distinguished with that in AdS spacetime. And with the decreasing of the distance between two horizons, the dS spacetime at the coexistent curve of HP phase transition is going along with different branches. Furthermore we also explore the influence of charge and non-linear charge correction on the coexistent curve.
Mean-value exergy modeling of internal combustion engines: characterization of feasible operating regions
Creators: name: Pozzato, Gabriele
name: Rizzo, Denise
name: Onori, Simona
Publisher: name: arXiv
Year: 2021
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: In this paper, a novel mean-value exergy-based modeling framework for internal combustion engines is developed. The characterization of combustion irreversibilities, thermal exchange between the in-cylinder mixture and the cylinder wall, and non-stoichiometric combustion allows for a comprehensive description of the availability transfer and destruction phenomena in the engine. The model is applicable to internal combustion engines operating both in steady-state and over a sequence of operating points and can be used to characterize the whole engine operating region, allowing to create static maps describing the exergetic behavior of the engine as a function of speed and load. The application of the proposed modeling strategy is shown for a turbocharged diesel engine. Ultimately, the static maps, while providing insightful information about inefficiencies over the whole operating field of the engine, are the enabling step for the development of exergy-based control strategies aiming at minimizing the overall operational losses of ground vehicles.
title: Rezension: Walahfrid Strabo: De cultura hortorum (Hortulus)/Über den Gartenbau. Lateinisch/Deutsch
Creators: name: Brandt, Rüdiger
Publisher: name: DuEPublico: Duisburg-Essen Publications online, University of Duisburg-Essen, Germany
Year: 2002
Subjects: subject: 400

description: Übersetzt und herausgegeben von Otto Schönberger. Stuttgart: Reclam 2002 (Reclams Universal-Bibliothek. 18199). 118 Seiten; 25 Abb. 3,60 €
description: Perspicuitas: ​Internet-Periodicum für mediävistische Sprach-, Literatur- und Kulturwissenschaft, vol. 2002
Expediting DECam Multimessenger Counterpart Searches with Convolutional Neural Networks
Creators: name: Shandonay, Adam
name: Morgan, Robert
name: Bechtol, Keith
name: Bom, Clecio R.
name: Nord, Brian
name: Garcia, Alyssa
name: Henghes, Ben
name: Herner, Kenneth
name: Tabbutt, Megan
name: Palmese, Antonella
name: Santana-Silva, Luidhy
name: Soares-Santos, Marcelle
name: Gill, Mandeep S. S.
name: Garcia-Bellido, Juan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Searches for counterparts to multimessenger events with optical imagers use difference imaging to detect new transient sources. However, even with existing artifact detection algorithms, this process simultaneously returns several classes of false positives: false detections from poor quality image subtractions, false detections from low signal-to-noise images, and detections of pre-existing variable sources. Currently, human visual inspection to remove the false positives is a central part of multimessenger follow-up observations, but when next generation gravitational wave and neutrino detectors come online and increase the rate of multimessenger events, the visual inspection process will be prohibitively expensive. We approach this problem with two convolutional neural networks operating on the difference imaging outputs. The first network focuses on removing false detections and demonstrates an accuracy of 92 percent on our dataset. The second network focuses on sorting all real detections by the probability of being a transient source within a host galaxy and distinguishes between various classes of images that previously required additional human inspection. We find the number of images requiring human inspection will decrease by a factor of 1.5 using our approach alone and a factor of 3.6 using our approach in combination with existing algorithms, facilitating rapid multimessenger counterpart identification by the astronomical community.
description: Published in ApJ
Bootstrapping the error of Oja's algorithm
Creators: name: Lunde, Robert
name: Sarkar, Purnamrita
name: Ward, Rachel
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistics Theory (math.ST)
subject: Methodology (stat.ME)
subject: Machine Learning (stat.ML)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: We consider the problem of quantifying uncertainty for the estimation error of the leading eigenvector from Oja's algorithm for streaming principal component analysis, where the data are generated IID from some unknown distribution. By combining classical tools from the U-statistics literature with recent results on high-dimensional central limit theorems for quadratic forms of random vectors and concentration of matrix products, we establish a weighted $χ^2$ approximation result for the $\sin^2$ error between the population eigenvector and the output of Oja's algorithm. Since estimating the covariance matrix associated with the approximating distribution requires knowledge of unknown model parameters, we propose a multiplier bootstrap algorithm that may be updated in an online manner. We establish conditions under which the bootstrap distribution is close to the corresponding sampling distribution with high probability, thereby establishing the bootstrap as a consistent inferential method in an appropriate asymptotic regime.
title: Rezension: David Matthews: Invention of Middle English. An Anthology of Primary Sources
Creators: name: Utz, Richard
Publisher: name: DuEPublico: Duisburg-Essen Publications online, University of Duisburg-Essen, Germany
Year: 2001
Subjects: subject: 400

description: University Park, PA: Pennsylvania State University Press, 2001. ISBN 0-271-02082-2 (paper); $ 19.19
description: Perspicuitas: ​Internet-Periodicum für mediävistische Sprach-, Literatur- und Kulturwissenschaft, vol. 2001
title: Rezension: Kurt Franz/ Walter Kahn (Hg.): MÄRCHEN - KINDER - MEDIEN. Beiträge zur medialen Adaption von Märchen und zum didaktischen Umgang
Creators: name: O'Sullivan, Emer
Publisher: name: DuEPublico: Duisburg-Essen Publications online, University of Duisburg-Essen, Germany
Year: 2001
Subjects: subject: 400

description: (= Schriftenreihe der Deutschen Akademie für Kinder- und Jugendliteratur Volkach e.V. Band 25). Hohengehren: Schneider 2000. 220 Seiten. ISBN 3-89676-334-2, DM 32,00
description: Perspicuitas: ​Internet-Periodicum für mediävistische Sprach-, Literatur- und Kulturwissenschaft, vol. 2001
Certification of quantum states with hidden structure of their bitstrings
Creators: name: Sotnikov, O. M.
name: Iakovlev, I. A.
name: Iliasov, A. A.
name: Katsnelson, M. I.
name: Bagrov, A. A.
name: Mazurenko, V. V.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The rapid development of quantum computing technologies already made it possible to manipulate a collective state of several dozen of qubits. This success poses a strong demand on efficient and reliable methods for characterization and verification of large-scale many-body quantum states. Traditional methods, such as quantum tomography, which require storing and operating wave functions on classical computers, become problematic to use in the regime of large number of degrees of freedom. In this paper, we propose a numerically cheap procedure to describe and distinguish quantum states which is based on a limited number of simple projective measurements in at least two different bases and computing inter-scale dissimilarities of the resulting bit-string patterns via coarse-graining. The information one obtains through this procedure can be viewed as a "hash function" of quantum state -- a simple set of numbers which is specific for a concrete many-body wave function and can be used for certification. By studying a number of archetypal examples, we show that it is enough to characterize quantum states with different structure of entanglement, including the chaotic quantum states. The connection of the dissimilarity to standard measures of quantum correlations such as von Neumann entropy is discussed. We also demonstrate that our approach can be employed to detect phase transitions of different nature in many-body quantum magnetic systems.
title: Rezension: Karin Schneider: Paläographie und Handschriftenkunde für Germanisten
Creators: name: Rohr, W.
Publisher: name: DuEPublico: Duisburg-Essen Publications online, University of Duisburg-Essen, Germany
Year: 2001
Subjects: subject: 400

description: Eine Einführung, (Sammlung kurzer Grammatiken germanischer Dialekte B, Ergänzungsreihe 8) Tübingen 1999, X, 237 S., ISBN 3-484-64007-3. DM 76,00
description: Perspicuitas: ​Internet-Periodicum für mediävistische Sprach-, Literatur- und Kulturwissenschaft, vol. 2001
title: Rezension: Gabriele Bensberg: Die Laxdœla saga im Spiegel christlich-mittelalterlicher Tradition
Creators: name: Heinemann, Fredrik
Publisher: name: DuEPublico: Duisburg-Essen Publications online, University of Duisburg-Essen, Germany
Year: 2001
Subjects: subject: 400

description: Frankfurt/M., Berlin, Bern, Bruxelles, New York, Oxford, Wien: Peter Lang 2000. 347 S. (Information und Interpretation. Herausgegeben von Carola L. Gottzmann. Bd. 9). ISBN 3-631-36009-6 br. DM 89.-
description: Perspicuitas: ​Internet-Periodicum für mediävistische Sprach-, Literatur- und Kulturwissenschaft, vol. 2001
Ethnic and social divides within the BC salmon canning industry : a study of the North Pacific Cannery
Creators: name: Moon, Connor
Publisher: name: The University of British Columbia
Year: 2015

description: British Columbia’s fishing industry rose to great success over the course of the twentieth century, but in spite of its overall achievement, the industry’s workers faced massive differences in access to opportunity and economic provisions. This essay examines the employment characteristics of BC’s fishing industry, by conducting a case study of the North Pacific Cannery, to reveal how ethnic and social divides at once separated workers while unifying and strengthening the industry as a whole. An examination of the differing Native, Chinese, Japanese, White and Female groups will serve to demonstrate how each group was assigned a role within the cannery as the product of individual historical and social experiences. Each group was subject to differing adversities that ultimately contributed to their overall success or lack thereof, but ultimately, the sum of these differences helped create the fishing industry as it came to be. The specific combination of roles and duties assigned to each group is ultimately deemed to be an integral player in creating the behemoth that the BC fishing industry came to be.
title: Rezension: Rainer Baasner/ Kristina Koebe: wozu.was.wie. Literaturrecherche und Internet
Creators: name: Fröhlich, Jürgen
Publisher: name: DuEPublico: Duisburg-Essen Publications online, University of Duisburg-Essen, Germany
Year: 2001
Subjects: subject: 400

description: (Tools fürs Literaturstudium) CD-ROM. Stuttgart: Reclam 2000. ISBN 3-15-100215-3. DM 39,90
description: Perspicuitas: ​Internet-Periodicum für mediävistische Sprach-, Literatur- und Kulturwissenschaft, vol. 2001
title: Rezension: Józef Wiktorowicz: Die Temporaladverbien in der mittelhochdeutschen Zeit
Creators: name: Seidel, Kurt
Publisher: name: DuEPublico: Duisburg-Essen Publications online, University of Duisburg-Essen, Germany
Year: 2000
Subjects: subject: 400

description: Warszawa 1999, 225 S.
description: Perspicuitas: ​Internet-Periodicum für mediävistische Sprach-, Literatur- und Kulturwissenschaft, vol. 2000
title: Rezension: Heidrun Alex: Der Spruchdichter Boppe. Edition - Übersetzung - Kommentar
Creators: name: Schubert, Martin
Publisher: name: DuEPublico: Duisburg-Essen Publications online, University of Duisburg-Essen, Germany
Year: 1999
Subjects: subject: 400

description: (= Hermaea 82). Tübingen 1998
description: Perspicuitas: ​Internet-Periodicum für mediävistische Sprach-, Literatur- und Kulturwissenschaft, vol. 1999
title: Rezension: Eberhard Nellmann: Quellenverzeichnis zu den mittelhochdeutschen Wörterbüchern
Creators: name: Brandt, Rüdiger
Publisher: name: DuEPublico: Duisburg-Essen Publications online, University of Duisburg-Essen, Germany
Year: 1998
Subjects: subject: 400

description: Ein kommentiertes Verzeichnis zum ‘Benecke / Müller Zarncke’ und zum ‘Lexer’. Stuttgart, Leipzig: Hirzel 1997. 212 Seiten [Quellenverzeichnis: S. 13-212]. 36,00 DM
description: Perspicuitas: ​Internet-Periodicum für mediävistische Sprach-, Literatur- und Kulturwissenschaft, vol. 1998
title: Investigation of smart city concepts to improve emission-free mobility: The example of the city of Cologne
Creators: name: Goudz, Alexander
name: Sanlimeral, Yunus
Publisher: name: DuEPublico: Duisburg-Essen Publications online, University of Duisburg-Essen, Germany
Year: 2023
Subjects: subject: 620

description: In today's society, issues such as climate change and resource scarcity are of great importance. What can be done to mitigate climate impacts and make our world more environmentally friendly and innovative? Smart City is a term that has not yet been uniformly clarified. But it is clear that cities which are developed or built according to Smart City concepts are significantly more environmentally friendly, efficient and digitally positioned. Cologne is the fourth largest city in Germany and is a pioneer in topics such as the expansion of emission-free mobility, especially in public transport. In addition, several smart city projects that the city has carried out with cooperation partners are considered innovative projects with a promising future. However, there is a large amount of traffic in million inhabitants city, which repeatedly leads to concentrations of air pollutants that exceed the limit values. One key focus of the city is reducing traffic and thus reducing air pollutants at the same time. As part of its Green City Master Plan, numerous measures have been initiated that have successfully improved the air quality and reduced traffic. The first steps of a smart city development have been developed and implemented and will be further advanced in future. Cologne proved to be the ideal city for the thesis of this work: "Investigation of Smart City Concepts for the Improvement of emission-free Mobility - The Example of the City of Cologne".
Supplementary document for Y-Z cut lithium niobate longitudinal piezoelectric resonant photoelastic modulator - 6165772.pdf
Creators: name: Atalar, Okan
name: Yee, Steven
name: Safavi-Naeini, Amir
name: Arbabian, Amin
Publisher: name: Optica Publishing Group
Year: 2025
Subjects: Optical Technology

description: Supplemental document
title: Einflussfaktoren der Kündigungsabsicht von Beschäftigten - eine empirische Analyse unter Berücksichtigung von Drittvariableneffekten
Creators: name: Kelm, Stephanie
Publisher: name: DuEPublico: Duisburg-Essen Publications online, University of Duisburg-Essen, Germany
Year: 2023
Subjects: subject: 330
subject: 300

description: Die vorliegende wissenschaftliche Arbeit wurde im Rahmen des betriebswirtschaftlichen Studiums an der Mercator School of Management der Universität Duisburg-Essen am Lehrstuhl für Personal und Unternehmensführung als Masterarbeit angefertigt. Die Arbeit beschäftigt sich mit Einflussfaktoren der Kündigungsabsicht von Beschäftigten. Frau Kelm gelingt es, mithilfe eines eigens entwickelten Modells und einer varianzanalytischen Strukturgleichungsanalyse die direkten und indirekten Einflüsse der unterstützenden Führung, der allgemeinen Selbstwirksamkeit, der Arbeitszufriedenheit und der empfundenen Job Alternativen auf die Kündigungsabsicht von Beschäftigten zu analysieren. Zusammenfassend kann bei einer ganzheitlichen Betrachtung herausgearbeitet werden, dass die Kündigungsabsicht insbesondere durch die unterstützende Führung beeinflusst wird. Die allgemeine Selbstwirksamkeit und die empfundenen Job Alternativen beeinflussen die Kündigungsabsicht ebenfalls, wenngleich die Einflüsse nicht so bedeutsam sind wie der Einfluss der unterstützenden Führung. In diesem Zusammenhang sind auch die mediierenden Effekte der Arbeitszufriedenheit und die moderierenden Effekte der empfundenen Job Alternativen relevant, auch wenn die moderierenden Effekte nur marginal sind.
description: Diskussionspapiere des Lehrstuhls für Personal und Unternehmensführung, vol. 18
Lest we forget : the contributions of Japanese-Canadian veterans in the First World War
Creators: name: MacLeod, Alex
Publisher: name: The University of British Columbia
Year: 2015

description: In 2016 The Nikkei National Museum and Cultural Centre will publish a book commemorating the lives of the Japanese-Canadian men who selflessly risked their lives fighting for Canada during the First World War. At a time when Japanese immigrants faced discrimination and racism the question as to why they volunteered has gone largely unanswered. When the government of British Columbia denied their requests to enlist for no other reason than their ethnicity, these brave men made the arduous journey to Alberta where they would find acceptance. Facing countless injustices, Japanese-Canadians were anxious to prove to their fellow Canadians that they were worthy of equal treatment and the right to vote. Having conducted research, reading first and second hand accounts of these veterans and their family, I have come to the conclusion that fighting for Canada was seen as a way of achieving the status of being a citizen. And while this effort was unsuccessful in the short run, their heroism and selfless contributions to the war effort marked a social shift in terms of recognising Japanese-Canadians as citizens even if the government would drag its heels for decades to come. Despite providing a context for which to analyse the lives of Japanese immigrants to Canada, the main purpose of this research is to shed light on the personal and individual lives of these veterans in an attempt to keep their stories alive for future generations and to commemorate the brave men who in the face of great injustice fought for the rights we take for granted today. These are their stories.
uiCA: Accurate Throughput Prediction of Basic Blocks on Recent Intel Microarchitectures
Creators: name: Abel, Andreas
name: Reineke, Jan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Performance (cs.PF)
subject: FOS: Computer and information sciences

description: Performance models that statically predict the steady-state throughput of basic blocks on particular microarchitectures, such as IACA, Ithemal, llvm-mca, OSACA, or CQA, can guide optimizing compilers and aid manual software optimization. However, their utility heavily depends on the accuracy of their predictions. The average error of existing models compared to measurements on the actual hardware has been shown to lie between 9% and 36%. But how good is this? To answer this question, we propose an extremely simple analytical throughput model that may serve as a baseline. Surprisingly, this model is already competitive with the state of the art, indicating that there is significant potential for improvement. To explore this potential, we develop a simulation-based throughput predictor. To this end, we propose a detailed parametric pipeline model that supports all Intel Core microarchitecture generations released between 2011 and 2021. We evaluate our predictor on an improved version of the BHive benchmark suite and show that its predictions are usually within 1% of measurement results, improving upon prior models by roughly an order of magnitude. The experimental evaluation also demonstrates that several microarchitectural details considered to be rather insignificant in previous work, are in fact essential for accurate prediction. Our throughput predictor is available as open source at https://github.com/andreas-abel/uiCA.
Bespoke Fractal Sampling Patterns for Discrete Fourier Space via the Kaleidoscope Transform
Creators: name: White, Jacob M.
name: Crozier, Stuart
name: Chandra, Shekhar S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Sampling strategies are important for sparse imaging methodologies, especially those employing the discrete Fourier transform (DFT). Chaotic sensing is one such methodology that employs deterministic, fractal sampling in conjunction with finite, iterative reconstruction schemes to form an image from limited samples. Using a sampling pattern constructed entirely from periodic lines in DFT space, chaotic sensing was found to outperform traditional compressed sensing for magnetic resonance imaging; however, only one such sampling pattern was presented and the reason for its fractal nature was not proven. Through the introduction of a novel image transform known as the kaleidoscope transform, which formalises and extends upon the concept of downsampling and concatenating an image with itself, this paper: (1) demonstrates a fundamental relationship between multiplication in modular arithmetic and downsampling; (2) provides a rigorous mathematical explanation for the fractal nature of the sampling pattern in the DFT; and (3) leverages this understanding to develop a collection of novel fractal sampling patterns for the 2D DFT with customisable properties. The ability to design tailor-made fractal sampling patterns expands the utility of the DFT in chaotic imaging and may form the basis for a bespoke chaotic sensing methodology, in which the fractal sampling matches the imaging task for improved reconstruction.
description: 6 pages, 7 figures
The environmental impacts of run-of-river hydroelectric projects in British Columbia
Creators: name: Shives, Paul
Publisher: name: The University of British Columbia
Year: 2015

description: Run-of-river hydroelectric schemes have grown rapidly in British Columbia since BC’s 2002 Energy Plan was released. These projects are often claimed to be one of the most environmentally friendly methods of electricity generation, in particular as a tool to combat climate change. However, the body of literature on the subject highlights that these facilities have the potential to have wide-ranging impacts on the environment. Changes to abiotic factors in the aquatic system brought about by these projects include increased temperatures, reductions of in-stream flows, increased fine sediment concentrations and rapid changes to discharge. These abiotic alterations lead to biotic impacts: namely, reducing the quantity and quality of available fish habitat (in particular to Salmonids) as well as reducing the amount of aquatic invertebrates, a primary food source for fish. Moreover, to have these projects operational, they require dozens of kilometers of linear infrastructure, most notably rehabilitated resource roads and newly constructed transmission line networks to connect to BC Hydro’s grid. The upshot of my research indicates that run-of-river projects are not as environmentally benign as some would have the public believe, and it is uncertain whether their climate change mitigations trump their immediate aquatic and terrestrial impacts.
Classification and reconstruction of spatially overlapping phase images using diffractive optical networks
Creators: name: Mengu, Deniz
name: Veli, Muhammed
name: Rivenson, Yair
name: Ozcan, Aydogan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Neural and Evolutionary Computing (cs.NE)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Diffractive optical networks unify wave optics and deep learning to all-optically compute a given machine learning or computational imaging task as the light propagates from the input to the output plane. Here, we report the design of diffractive optical networks for the classification and reconstruction of spatially overlapping, phase-encoded objects. When two different phase-only objects spatially overlap, the individual object functions are perturbed since their phase patterns are summed up. The retrieval of the underlying phase images from solely the overlapping phase distribution presents a challenging problem, the solution of which is generally not unique. We show that through a task-specific training process, passive diffractive networks composed of successive transmissive layers can all-optically and simultaneously classify two different randomly-selected, spatially overlapping phase images at the input. After trained with ~550 million unique combinations of phase-encoded handwritten digits from the MNIST dataset, our blind testing results reveal that the diffractive network achieves an accuracy of >85.8% for all-optical classification of two overlapping phase images of new handwritten digits. In addition to all-optical classification of overlapping phase objects, we also demonstrate the reconstruction of these phase images based on a shallow electronic neural network that uses the highly compressed output of the diffractive network as its input (with e.g., ~20-65 times less number of pixels) to rapidly reconstruct both of the phase images, despite their spatial overlap and related phase ambiguity. The presented phase image classification and reconstruction framework might find applications in e.g., computational imaging, microscopy and quantitative phase imaging fields.
description: 30 Pages, 7 Figures, 2 Tables
Unidirectional valley-contrasting photo-current in strained transition metal dichalcogenide monolayers
Creators: name: Asgari, Reza
name: Culcer, Dimitrie
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We examine the full static non-linear optical response of uniaxially strained transition metal dichalcogenide monolayers doped with a finite carrier density in the conduction band, in the presence of disorder. We find that the customary shift current is suppressed, yet we identify a strong, valley-dependent non-reciprocal response, which we term a \textit{unidirectional valley-contrasting photo-current} (UVCP). This DC current originates from the combined effect of strain and Kramers symmetry breaking by trigonal warping, while the contributions due to individual valleys can be separated by introducing an energy offset between them by means of a magnetization. This latter fact enables one to monitor inter-valley transitions. The UVCP is proportional to the mobility and is enhanced by the excitonic Coulomb interaction and inter-valley scattering, as well as by a top gate bias. We discuss detection strategies in state-of-the-art experiments.
description: Main text: 33 pages, 9 figures
title: Technology, Skills, and Performance: The Case of Robots in Surgery
Creators: name: Tafti, Elena
Publisher: name: DuEPublico: Duisburg-Essen Publications online, University of Duisburg-Essen, Germany
Year: 2023
Subjects: subject: Health innovation
subject: Surgical robots
subject: Surgical performance
subject: Skill heterogeneity
subject: 610
subject: 330

description: This paper investigates the potential of new technologies to reduce disparities in the provision of healthcare services. Differences in providers’ skills may cause variation in patient outcomes. The adoption of innovations, like robots, can attenuate this problem if technological gains are decreasing in users’ skills or may exacerbate existing variation in performance otherwise. I show that, in England, the diffusion of surgical robots coincided with an improvement in average surgical performance and a convergence in outcomes between high and lower-skilled surgeons for prostate cancer patients. I study whether this pattern can be attributed to the adoption of robots using the universe of inpatient admissions to the National Health Service (NHS). To identify the effects of robotic surgery on patient outcomes, I exploit quasi-random variation in the geographic allocation of robots, allowing for selection and heterogeneity in treatment effects. I find that robots shorten patients’ length of stay in hospital and decrease the incidence of adverse events from surgery, but their effects significantly depend on surgeons’ skills. The robot has little impact on the performance of highly skilled surgeons, while lower skilled surgeons gain the most from it. I also uncover a strong pattern of negative selection on both observable and unobservable characteristics. Although the attainable gains are higher for lower-skilled surgeons, they use the robot the least. My results suggest that the potential benefit of a new technology largely depends on how it combines with the skills of the individual users.
description: CINCH working paper series, vol. 2023, no. 01
An anisotropic cohesive fracture model: advantages and limitations of length-scale insensitive phase-field damage models
Creators: name: Rezaei, Shahed
name: Harandi, Ali
name: Brepols, Tim
name: Reese, Stefanie
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computational Engineering, Finance, and Science (cs.CE)
subject: FOS: Computer and information sciences

description: The goal of the current work is to explore direction-dependent damage initiation and propagation within an arbitrary anisotropic solid. In particular, we aim at developing anisotropic cohesive phase-field (PF) damage models by extending the idea introduced in \cite{REZAEI2021a} for direction-dependent fracture energy and also anisotropic PF damage models based on structural tensors. The cohesive PF damage formulation used in the current contribution is motivated by the works of \cite{LORENTZ201120, wu2018, GEELEN2019}. The results of the latter models are shown to be insensitive with respect to the length scale parameter for the isotropic case. This is because they manage to formulate the fracture energy as a function of diffuse displacement jumps in the localized damaged zone. In the present paper, we discuss numerical examples and details on finite element implementations where the fracture energy, as well as the material strength, are introduced as an arbitrary function of the crack direction. Using the current formulation for anisotropic cohesive fracture, the obtained results are almost insensitive with respect to the length scale parameter. The latter is achieved by including the direction-dependent strength of the material in addition to its fracture energy. Utilizing the current formulation, one can increase the mesh size which reduces the computational time significantly without any severe change in the predicted crack path and overall obtained load-displacement curves. We also argue that these models still lack to capture mode-dependent fracture properties. Open issues and possible remedies for future developments are finally discussed as well.
Keller-type bounds for Dirac operators perturbed by rigid potentials
Creators: name: Mizutani, Haruya
name: Schiavone, Nico Michele
Publisher: name: arXiv
Year: 2021
Subjects: subject: Spectral Theory (math.SP)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: primary 35P15, 35J99, 47A10, 47F05, 81Q12

description: In this paper we are interested in generalizing Keller-type eigenvalue estimates for the non-selfadjoint Schrödinger operator to the Dirac operator, imposing some suitable rigidity conditions on the matricial structure of the potential, without necessarily requiring the smallness of its norm.
description: 40 pages, 4 figures, added references in Section 1
On background driving distribution functions (BDDF) for some selfdecomposable variables
Creators: name: Jurek, Zbigniew J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60E07, 60E10, 60G50, 62E10

description: Many classical variables (statistics) are selfdecomposable. They admit the random integral representations via Lévy processes. In this note are given formulas for their background driving distribution functions (BDDF). This may be used for a simulation of those variables. Among the examples discussed are: gamma variables, hyperbolic characteristic functions, Student t-distributions, stochastic area under planar Brownian motions, inverse Gaussian variable, logistic distributions, non-central chi-square, Bessel densities and Fisher z-distributions. Found representations might be of use in statistical applications.
Effect of Temperature History During Additive Manufacturing on Crystalline Morphology of Polyether Ether Ketone
Creators: name: Lee, Austin
name: Wynn, Mathew
name: Quigley, Liam
name: Salviato, Marco
name: Zobeiry, Navid
Publisher: name: arXiv
Year: 2021
Subjects: subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Additive manufacturing parameters of high-performance polymers greatly affect the thermal history and consequently quality of the end-part. For fused deposition modeling (FDM), this may include printing speed, filament size, nozzle, and chamber temperatures, as well as build plate temperature. In this study, the effect of thermal convection inside a commercial 3D printer on thermal history and crystalline morphology of polyetheretherketone (PEEK) was investigated using a combined experimental and numerical approach. Using digital scanning calorimetry (DSC) and polarized optical microscopy (POM), crystallinity of PEEK samples was studied as a function of thermal history. In addition, using finite element (FE) simulations of heat transfer, which were calibrated using thermocouple measurements, thermal history of parts during virtual 3D printing was evaluated. By correlating the experimental and numerical results, the effect of printing parameters and convection on thermal history and PEEK crystalline morphology was established. It was found that the high melting temperature of PEEK, results in fast melt cooling rates followed by short annealing times during printing, leading to relatively low degree of crystallinity (DOC) and small crystalline morphology.
description: 23 pages, 12 figures, 3 tables
Coastal BC stumpage : an in-depth explanation of the BC coastal stumpage determination process
Creators: name: Yano, Jordan
Publisher: name: The University of British Columbia
Year: 2015

description: The stumpage system in British Columbia is broken into two different appraisal systems, one for the coast region and one for the interior. The current coastal appraisal system causes confusion within the industry and usually results in the need for an expert to handle all of the stumpage compilation needs for a company, and another person to calculate a rate on behalf of the Provincial Government. This discussion paper looks at the coastal appraisal system for areas held by licensees and by the BC Timber Sales system, and how the system calculates a final stumpage rate for both. By rearranging the equations used by the appraisal process, it has been determined that the final rate is highly variable depending on microsite conditions, and therefore the system should be critically examined and refined by the governing body. Two such modifications are briefly examined; one using a straight taxation system and the other examines the use of an escrow account, which licensees can withdraw from for required silviculture treatments.
Auxetic properties of a newly proposed $γ$-graphyne-like material
Creators: name: Paupitz, Ricardo
name: da Silva, Tales J.
name: Caldas, Marilia J.
name: Galvão, Douglas S.
name: Fonseca, Alexandre F.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: In this work, we propose a new auxetic (negative Poisson's ratio values) structure, based on a $γ$-graphyne structure, here named $AγG$ $structure$. Graphynes are 2D carbon allotropes with phenylic rings connected by acetylenic groups. The A$γ$G structural/mechanical and electronic properties, as well as its thermal stability, were investigated using classical reactive and quantum molecular dynamics simulations. We found that A$γ$G has a large bandgap of 2.48 eV and is thermally stable at a large range of temperatures. It presents a Young's modulus that is an order of magnitude smaller than that of graphene or $γ$-graphyne. The classical and quantum results are consistent and validate that the A$γ$G is auxetic, both when isolated (vacuum) and when deposited on a copper substrate. We believe that this is the densest auxetic structure belonging to the graphyne-like families.
description: 3 figures, 1 table
Increasing Social and Spatial Quality in Reorganization Plans for Dilapidated Neighborhood Contexts
Creators: name: Saba Sultan Qurraie*
name: Farzin Haghparast
name: Morteza Mirgholami
Publisher: name: Zenodo
Year: 2025
Subjects: Urban Design, Neighborhood, Sense of Place, SWOT, Social Sustainability, Spatial Quality.

description: Abstract: The main goal of this research is to improve spatial quality, provide solutions and develop effective strategies for organizing the worn-out fabric of Haji Hamedan neighborhood. Based on the research goal, the following secondary goals are also considered. Understanding the social, economic, and physical situation of Haji Hamedan neighborhood. Organizing and improving a neighborhood to give identity to the city of Hamedan. Identifying an efficient and people-oriented urban improvement and renovation model increases the motivation to reside within the neighborhood, and promotes economic, social, and physical activities. In the theoretical foundations section, the information is presented in a descriptive-analytical form, and the information and data obtained are analyzed in the field impressions. Then, the information obtained is evaluated using the SWOT model. This model is a tool for examining internal organizational strengths and weaknesses and external organizational opportunities and threats. In a general sense, it is a tool for use in the preliminary stages of decision-making and as a precursor to strategic planning in its applied form. Strategic goals and policies: Creating an appropriate discourse among the Past, Present, and future through the application of urban design goals. Strengthening the sense of place at the texture level by enhancing the perceptual and visual values of space. Spatialization, revitalization, and strengthening of existing neighborhood centers. Improving the sense of desirability and vitality in the spaces and axes of the texture. Defining and developing valuable patterns from the perspective of the urban environment in organizing space. Anticipating appropriate visual corridors to stabilize and recognize the symbolic elements of the texture. Organizing the skeleton of elements with old values and new elements. Creating harmonious and balanced visual connections in the axes of the texture based on the citizen's perception of space. Concern about keeping the mental memories of the texture alive in the new body. Observing the principles related to symmetry, diversity, sequence and continuity, movement, stillness, scale, skyline, nodes, edges, and signs in the cultural-old axes of the texture and new constructions, especially in textures with the old value.
Line-graph-lattice crystal structures of stoichiometric materials
Creators: name: Chiu, Christie S.
name: Carroll, Annette N.
name: Regnault, Nicolas
name: Houck, Andrew A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The origin of many quantum-material phenomena is intimately related to the presence of flat electronic bands. In quantum simulation, such bands have been realized through line-graph lattices, a class of lattices known to exhibit flat bands. Based on that work, we conduct a high-throughput screening for line-graph lattices among the crystalline structures of the Materials Flatband Database and report on new candidates for line-graph materials and lattice models. In particular, we find materials with line-graph-lattice structures beyond the two most commonly known examples, the kagomé and pyrochlore lattices. We also identify materials which may exhibit flat topological bands. Finally, we examine the various line-graph lattices detected and highlight those with gapped flat bands and those most frequently represented among this set of materials. With the identification of real stoichiometric materials and theoretical lattice geometries, the results of this work may inform future studies of flat-band many-body physics in both condensed matter experiment and theory.
description: 8+2 pages, 5+1 figures, 2 tables
title: Modern und doch traditional: Fallrekonstruktionen von innerfamilialen Sorgezuständigkeiten in ost-westdeutschen Paarbeziehungen
Creators: name: Krüger, Franziska
Publisher: name: DuEPublico: Duisburg-Essen Publications online, University of Duisburg-Essen, Germany
Year: 2023
Subjects: subject: 300

description: Journal Netzwerk Frauen- und Geschlechterforschung NRW, vol. 2023, no. 52, p. 29
title: Qualitätssicherung von Gleichstellungsmaßnahmen in der Wissenschaft: Ergebnisse aus dem Projekt StaRQ
Creators: name: Steinweg, Nina
name: Roland, Lisa
name: Abraham, Christine
name: Schumacher, Theresa
Publisher: name: DuEPublico: Duisburg-Essen Publications online, University of Duisburg-Essen, Germany
Year: 2023
Subjects: subject: 300

description: Journal Netzwerk Frauen- und Geschlechterforschung NRW, vol. 2023, no. 52, p. 37
Supplementary document for Y-Z cut lithium niobate longitudinal piezoelectric resonant photoelastic modulator - 6165772.pdf
Creators: name: Atalar, Okan
name: Yee, Steven
name: Safavi-Naeini, Amir
name: Arbabian, Amin
Publisher: name: Optica Publishing Group
Year: 2022
Subjects: Optical Technology

description: Supplemental document
title: Geschlechterparität in Hochschulleitungen und -gremien – zur Entwicklung von 2013 bis 2023
Creators: name: Basler, Hayley
name: Niegel, Jennifer
name: Sickelmann, Sarah
Publisher: name: DuEPublico: Duisburg-Essen Publications online, University of Duisburg-Essen, Germany
Year: 2023
Subjects: subject: 300

description: Journal Netzwerk Frauen- und Geschlechterforschung NRW, vol. 2023, no. 52, p. 43
title: Paradoxien überwinden – die Geschichte der Philosophie neu schreiben
Creators: name: Hagengruber, Ruth
Publisher: name: DuEPublico: Duisburg-Essen Publications online, University of Duisburg-Essen, Germany
Year: 2023
Subjects: subject: 300

description: Journal Netzwerk Frauen- und Geschlechterforschung NRW, vol. 2023, no. 52, p. 46
Improving access to contraception in rural communities: An educational intervention for providers
Creators: name: Fischler, Emma
Publisher: name: Oregon Health and Science University
Year: 2024
Subjects: subject: Contraception
subject: Oregon
subject: contraception + intrauterine device + emergency contraception + rural

description: To improve access to reproductive healthcare and contraceptive counseling in rural communities in the United States, additional medical provider education on contraception use and counseling was implemented in a quality improvement project. The project aim is to increase comprehensive contraceptive care access for rural communities by implementing contraception education for clinicians in rural settings.
title: Im Dazwischen: Zur (Un-)Sichtbarkeit lesbischer Lebensweisen nicht nur im Ruhrgebiet
Creators: name: Mense, Lisa
Publisher: name: DuEPublico: Duisburg-Essen Publications online, University of Duisburg-Essen, Germany
Year: 2023
Subjects: subject: 300

description: Journal Netzwerk Frauen- und Geschlechterforschung NRW, vol. 2023, no. 52, p. 50
title: Queerness und Animation
Creators: name: Siebelhoff, Alexis
name: Meinel, Dietmar
Publisher: name: DuEPublico: Duisburg-Essen Publications online, University of Duisburg-Essen, Germany
Year: 2023
Subjects: subject: 300

description: Journal Netzwerk Frauen- und Geschlechterforschung NRW, vol. 2023, no. 52, p. 57
Oral cannabinoid formulation elevates sensory nerve conduction velocity and mitigates oxidative stress to alleviate neuropathic pain in rats
Creators: name: Mathur, Shruti
name: Kamini
name: Gupta, Neetu
name: Bhansali, Anil G.
name: Mathur, Rajani
name: Kundu, Suman
Publisher: name: Taylor & Francis
Year: 2025
Subjects: subject: Biochemistry
subject: Medicine
subject: Cell Biology
subject: Neuroscience
subject: Physiology
subject: FOS: Biological sciences
subject: Chemical Sciences not elsewhere classified
subject: Biological Sciences not elsewhere classified
subject: Science Policy

description: Use of potent painkillers like opiates are limited by their abuse potential and adverse physiological effects necessitating new therapeutics for pain management. This study assessed the efficacy of oral cannabinoid formulations (F1–F4) in alleviating chronic neuropathic pain (CP) and investigated their mechanisms through thermal algesia, inflammatory and oxidative stress biomarkers, and sensory nerve conduction velocity (SNCV). A 21-day rat model of chronic constriction injury (CCI) of the sciatic nerve was used to evaluate the effects of oral cannabinoid formulations (F1: 500 mg, F2: 1000 mg, F3: 2000 mg, F4: 3000 mg) in MCT oil, with pregabalin as the reference. Male Wistar rats (35) were divided equally into seven groups, with all except the Sham group undergoing sciatic nerve ligation and receiving different formulations. On day 22, behavioral (hot plate, tail flick) and electrophysiological (sensory nerve conduction velocity, SNCV) assessments were performed. SNCV was also measured in the presence of CB1 and CB2 receptor antagonists. Additionally, blood-based markers of inflammation (TNF-α) and oxidative stress (MDA, GSH and CAT) were analysed. The vehicle group exhibited significant hyperalgesia (p <0.005), reduced sensory nerve conduction velocity (SNCV) (p <0.005) and elevated MDA and TNF-α levels, along with decreased GSH and CAT levels in both serum and sciatic nerve tissue. Among the formulations, F2 significantly improved pain latency and SNCV (p <0.005) compared to the vehicle group and outperformed F1, F3, F4 and pregabalin (p <0.05). Its effects were mediated through CB1 and CB2 receptor agonism while simultaneously reducing oxidative stress and inflammation, highlighting its potential as a promising candidate for neuropathic pain management.