cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Engineering dynamic protein-based hydrogels
Creators: name: Duan, Tianyu
Publisher: name: University of British Columbia
Year: 2022

description: Hydrogels are water-containing soft materials made of cross-linked polymer networks. Hydrogels can emulate many features of native tissues and organisms, and have therefore found many applications in biomedical studies. Recently, driven by the needs for stimuli-responsive materials in various biomedical applications, “dynamic” hydrogels that can change their physical, chemical, biological, or mechanical properties have attracted increasing interest. Recombinant proteins are promising hydrogel building blocks due to their biocompatibility, diverse biofunctions, and designable structures. Moreover, stimuli-responsive conformational changes and interactions of proteins provide possibilities for constructing dynamic protein-based hydrogels. This thesis reviews the state-of-the-art studies of dynamic protein-based hydrogels, including the cross-linking methods, the design principles, and the future directions of this field. Driven by the needs for more predictable, sensitive, and reversible hydrogels, we engineer novel protein-based hydrogels in this thesis. An elastomeric protein-based hydrogel is first engineered with thermo-responsive properties, which is controlled by the thermo-responsive in situ phase transition of the polypeptide side chains in the hydrogel network. Then, two dynamic hydrogels are physically cross-linked by a coiled coil interaction and a protein-protein interaction, respectively, which both exhibit time-dependent viscoelastic properties, multiple energy dissipation modes, and injectability. The viscoelastic properties of these two physically cross-linked hydrogels are stimuli-responsive due to the stimuli-responsive nature of their cross-linking methods. Finally, a light-controlled information writing approach is developed by using a light-responsive protein-protein interaction to decorate fluorescent proteins onto protein-based hydrogel blank slates. Consequently, 2D/3D fluorescence images can be produced and stored in protein-based hydrogels. The developed hydrogels are mainly responsive to temperature or light, which are two types of stimuli that have been widely adapted as therapeutic tools in biomedical studies. The stimuli-responsive property changes in the developed hydrogel systems are highly dose-sensitive and reversible, which facilitates customized fine tuning of hydrogel functionality. Therefore, we anticipate that these developed dynamic protein-based hydrogels will find various applications in biomedical studies. Moreover, the results of this thesis are expected to contribute to the quantitative prediction of dynamic hydrogel properties and inspire the bottom-up designs of other dynamic hydrogels.
Additional file 1: of Using behaviour change and implementation science to address low referral rates in oncology
Creators: name: Long, Janet
name: Debono, Deborah
name: Williams, Rachel
name: Salisbury, Elizabeth
name: OâNeill, Sharron
name: Eykman, Elizabeth
name: Butler, Jordan
name: Rawson, Robert
name: Phan-Thien, Kim-Chi
name: Thompson, Stephen
name: Braithwaite, Jeffrey
name: Chin, Melvin
name: Taylor, Natalie
Publisher: name: figshare
Year: 2018
Subjects: subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Science Policy
subject: Infectious Diseases
subject: FOS: Health sciences

description: Barrier Domains and examples of matched behaviour change techniques (BCT) for use in Focus groups. (DOCX 23 kb)
On small deviations of stationary Gaussian processes and related analytic inequalities
Creators: name: Weber, Michel J. G.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: Primary: 60F15, 60G50, Secondary: 60F05

description: Let $ \{X_j, j\in \Z\}$ be a Gaussian stationary sequence having a spectral function $F$ of infinite type. Then for all $n$ and $z\ge 0$,$$ ¶\Big\{\sup_{j=1}^n |X_j|\le z \Big\}\le \Big(\int_{-z/\sqrt{G(f)}}^{z/\sqrt{G(f)}} e^{-x^2/2}\frac{\dd x}{\sqrt{2π}} \Big)^n,$$ where $ G(f)$ is the geometric mean of the Radon Nycodim derivative of the absolutely continuous part $f$ of $F$. The proof uses properties of finite Toeplitz forms. Let $ \{X(t), t\in \R\}$ be a sample continuous stationary Gaussian process with covariance function $\g(u) $. We also show that there exists an absolute constant $K$ such that for all $T>0$, $a>0$ with $T\ge \e(a)$, $$¶\Big\{\sup_{0\le s,t\le T} |X(s)-X(t)|\le a\Big\} \le \exp \Big \{-{KT \over \e(a) p(\e(a))}\Big\} ,$$ where $\e (a)= \min\big\{b>0: \d (b)\ge a\big\}$, $\d (b)=\min_{u\ge 1}\{\sqrt{2(1-\g((ub))}, u\ge 1\}$, and $ p(b) = 1+\sum_{j=2}^\infty {|2\g (jb)-\g ((j-1)b)-\g ((j+1)b)| \over 2(1-\g(b))}$. The proof is based on some decoupling inequalities arising from Brascamp-Lieb inequality. Both approaches are developed and compared on examples. Several other related results are established.
Feedback from Central Black Holes in Elliptical Galaxies: Two-dimensional Models Compared to One-dimensional Models
Creators: name: Novak, G. S.
name: Ostriker, J. P.
name: Ciotti, L.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We extend the black hole (BH) feedback models of Ciotti, Ostriker, and Proga to two dimensions. In this paper, we focus on identifying the differences between the one-dimensional and two-dimensional hydrodynamical simulations. We examine a normal, isolated $L_*$ galaxy subject to the cooling flow instability of gas in the inner regions. Allowance is made for subsequent star formation, Type Ia and Type II supernovae, radiation pressure, and inflow to the central BH from mildly rotating galactic gas which is being replenished as a normal consequence of stellar evolution. The central BH accretes some of the infalling gas and expels a conical wind with mass, momentum, and energy flux derived from both observational and theoretical studies. The galaxy is assumed to have low specific angular momentum in analogy with the existing one-dimensional case in order to isolate the effect of dimensionality. The code then tracks the interaction of the outflowing radiation and winds with the galactic gas and their effects on regulating the accretion. After matching physical modeling to the extent possible between the one-dimensional and two-dimensional treatments, we find essentially similar results in terms of BH growth and duty cycle (fraction of the time above a given fraction of the Eddington luminosity). In the two-dimensional calculations, the cool shells forming at 0.1--1 kpc from the center are Rayleigh--Taylor unstable to fragmentation, leading to a somewhat higher accretion rate, less effective feedback, and a more irregular pattern of bursting compared to the one-dimensional case.
description: 15 pages, 10 figures, ApJ 237:26. Updated to match published version
Effective Equilibrium Description of Nonequilibrium Quantum Transport I: Fundamentals and Methodology
Creators: name: Dutt, Prasenjit
name: Koch, Jens
name: Han, J. E.
name: Hur, Karyn Le
Publisher: name: arXiv
Year: 2010
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The theoretical description of strongly correlated quantum systems out of equilibrium presents several challenges and a number of open questions persist. In this paper we focus on nonlinear electronic transport through a quantum dot maintained at finite bias using a concept introduced by Hershfield [Phys. Rev. Lett. 70, 2134 (1993)] whereby one can express such nonequilibrium quantum impurity models in terms of the system's Lippmann-Schwinger operators. These scattering operators allow one to reformulate the nonequilibrium problem as an effective equilibrium problem associated with a modified Hamiltonian, thus facilitating the implementation of equilibrium many-body techniques. We provide an alternative derivation of the effective Hamiltonian of Hershfield using the concept of an "open system". Furthermore, we demonstrate the equivalence between observables computed using the Schwinger-Keldysh framework and the effective equilibrium approach. For the study of transport, the non-equilibrium spectral function of the dot is identified as the quantity of principal interest and we derive general expressions for the current (the Meir-Wingreen formula) and the charge occupation of the dot. We introduce a finite temperature formalism which is used as a tool for computing real time Green's functions. In a companion paper we elucidate a generic scheme for perturbative calculations of interacting models, with particular reference to the Anderson model.
description: Part I and Part II have been combined in arXiv:1101.1526. Final version to be published in Annals of Physics
Fermi gamma-ray `bubbles' from stochastic acceleration of electrons
Creators: name: Mertsch, Philipp
name: Sarkar, Subir
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Gamma-ray data from Fermi-LAT reveal a bi-lobular structure extending up to 50 degrees above and below the galactic centre, which presumably originated in some form of energy release there less than a few million years ago. It has been argued that the gamma-rays arise from hadronic interactions of high energy cosmic rays which are advected out by a strong wind, or from inverse-Compton scattering of relativistic electrons accelerated at plasma shocks present in the bubbles. We explore the alternative possibility that the relativistic electrons are undergoing stochastic 2nd-order Fermi acceleration by plasma wave turbulence through the entire volume of the bubbles. The observed gamma-ray spectral shape is then explained naturally by the resulting hard electron spectrum and inverse Compton losses. Rather than a constant volume emissivity as in other models, we predict a nearly constant surface brightness, and reproduce the observed sharp edges of the bubbles.
description: 4 pages, 4 figures; REVTeX4-1; discussion amended and one figure added; to appear in PRL
Additional file 1 of Clinical outcomes of patients with giant cell arteritis treated with tocilizumab in real-world clinical practice: decreased incidence of new visual manifestations
Creators: name: Unizony, Sebastian
name: McCulley, Timothy J.
name: Spiera, Robert
name: Jinglan Pei
name: Sidiropoulos, Paris N.
name: Best, Jennie H.
name: Birchwood, Christine
name: Pavlov, Andrey
name: Stone, John H.
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Cell Biology
subject: Molecular Biology
subject: Pharmacology
subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: Science Policy
subject: Hematology

description: Additional file 1.
Experimental generation of single photons via active multiplexing
Creators: name: Ma, Xiao-song
name: Zotter, Stefan
name: Kofler, Johannes
name: Jennewein, Thomas
name: Zeilinger, Anton
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: An on-demand single-photon source is a fundamental building block in quantum science and technology. We experimentally demonstrate the proof of concept for a scheme to generate on-demand single photons via actively multiplexing several heralded photons probabilistically produced from pulsed spontaneous parametric down-conversions (SPDCs). By utilizing a four-photon-pair source, an active feed-forward technique, and an ultrafast single-photon router, we show a fourfold enhancement of the output photon rate. Simultaneously, we maintain the quality of the output single-photon states, confirmed by correlation measurements. We also experimentally verify, via Hong-Ou-Mandel interference, that the router does not affect the indistinguishability of the single photons. Furthermore, we give numerical simulations, which indicate that photons based on multiplexing of four SPDC sources can outperform the heralding based on highly advanced photon-number-resolving detectors. Our results show a route for on-demand single-photon generation and the practical realization of scalable linear optical quantum information processing.
Concept for the NFDI4Earth User Support Network Ticketing System (NFDI4Earth Deliverable D2.2.2)
Creators: name: Lörenz, Sören
name: Klammer, Ralf
name: Mehrtens, Hela
name: Langer, Ines
name: Purr, Christopher
name: Müller-Pfefferkorn, Ralph
Publisher: name: Zenodo
Year: 2023
Subjects: NFDI4Earth
Deliverable
USN

description: In this concept we will define the technical details (e.g.: name, response time, contact), rules and roles (e.g.: 1st-level- and 2nd-level-support), and certain answer types we expect for the basic internal support platform. The queue system will be based on the use of the support categories which have been defined together with M2.1 for the distribution of support requests to the support agents that have expertise in these categories. The documentation of the support standards and the internal communication between the agents is described. The annex contains templates for standard answers.
description: This work has been funded by the German Research Foundation (DFG) through the project NFDI4Earth (DFG project no.460036893, https://www.nfdi4earth.de/) within the German National Research Data Infrastructure (NFDI, https://www.nfdi.de/).
A New Lower Bound on the Maximum Number of Satisfied Clauses in Max-SAT and its Algorithmic Applications
Creators: name: Crowston, R.
name: Gutin, G.
name: Jones, M.
name: Yeo, A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: Discrete Mathematics (cs.DM)
subject: FOS: Computer and information sciences

description: A pair of unit clauses is called conflicting if it is of the form $(x)$, $(\bar{x})$. A CNF formula is unit-conflict free (UCF) if it contains no pair of conflicting unit clauses. Lieberherr and Specker (J. ACM 28, 1981) showed that for each UCF CNF formula with $m$ clauses we can simultaneously satisfy at least $\pp m$ clauses, where $\pp =(\sqrt{5}-1)/2$. We improve the Lieberherr-Specker bound by showing that for each UCF CNF formula $F$ with $m$ clauses we can find, in polynomial time, a subformula $F'$ with $m'$ clauses such that we can simultaneously satisfy at least $\pp m+(1-\pp)m'+(2-3\pp)n"/2$ clauses (in $F$), where $n"$ is the number of variables in $F$ which are not in $F'$. We consider two parameterized versions of MAX-SAT, where the parameter is the number of satisfied clauses above the bounds $m/2$ and $m(\sqrt{5}-1)/2$. The former bound is tight for general formulas, and the later is tight for UCF formulas. Mahajan and Raman (J. Algorithms 31, 1999) showed that every instance of the first parameterized problem can be transformed, in polynomial time, into an equivalent one with at most $6k+3$ variables and $10k$ clauses. We improve this to $4k$ variables and $(2\sqrt{5}+4)k$ clauses. Mahajan and Raman conjectured that the second parameterized problem is fixed-parameter tractable (FPT). We show that the problem is indeed FPT by describing a polynomial-time algorithm that transforms any problem instance into an equivalent one with at most $(7+3\sqrt{5})k$ variables. Our results are obtained using our improvement of the Lieberherr-Specker bound above.
Oded Schramm's contributions to noise sensitivity
Creators: name: Garban, Christophe
Publisher: name: arXiv
Year: 2010
Subjects: subject: Probability (math.PR)
subject: Mathematical Physics (math-ph)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We survey in this paper the main contributions of Oded Schramm related to noise sensitivity. We will describe in particular his various works which focused on the "spectral analysis" of critical percolation (and more generally of Boolean functions), his work on the shape-fluctuations of first passage percolation and finally his contributions to the model of dynamical percolation.
description: Published in at http://dx.doi.org/10.1214/10-AOP582 the Annals of Probability (http://www.imstat.org/aop/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Molded pulp food packaging from rapidly renewable fibers
Creators: name: Zhou, Chenli
Publisher: name: University of British Columbia
Year: 2023

description: The demand for biodegradable molded pulp packaging materials has increased significantly due to the ban on single-use plastics in many countries. Current dominant commercial molded pulp food containers impart oil resistance with the addition of Per- and Polyfluoroalkyl Substances (PFAS), but recent research has confirmed the toxicological effects of PFAS on human health. This strongly motivates the industry to find an alternative oil repellent that is food-grade safe, environmentally-friendly and effective. This thesis investigated a new modified starch-based oil repellent (SOR) as a wet-end additive. Non-wood fibers were selected to be the substrate to quantify the effects of additives due to the advantages of low cost, rapid renewability and abundant resources. The fiber morphology of bamboo, bagasse, wheat straw and miscanthus grass was characterized to select the suitable fibers for producing packaging materials. Due to the short fiber length and high coarseness, miscanthus grass was excluded from the subsequent experiments. Fiber blend effects on tensile index and paper porosity for bamboo, bagasse and wheat straw were investigated. Five commercial molded pulp food containers were characterized in terms of their physical and mechanical properties to benchmark laboratory fabrication and testing of prototypes. The quantitative effects of two key performance additives: alkyl ketene dimer (AKD) and SOR, and fiber blend were studied through mechanical and barrier property tests. I concluded that: (1) Bamboo fiber has the longest fiber length and can act as a reinforcement by mixing with short wheat straw and bagasse fibers; (2) Bamboo and bagasse fibers with thin cell wall can facilitate the formation of dense fiber network structure, which are better suited for food packaging manufacturing; (3) High sheet density and thin fiber cell wall are two critical factors to reduce the liquid penetration for paper substrate; (4) AKD and SOR are effective to provide water and oil resistance for molded pulp products, but the current bio-based oil repellent appears to not perform as well as PFAS additives; (5) Fiber blend can lead to more synergistic interaction with performance additives and result in better overall mechanical and barrier properties.
title: L’ultima Thule: un viaggio verso il fondamento del diritto
Creators: name: Scerbo, Alberto
Publisher: name: Italian Society for Law and Literature (ISLL)
Year: 2023

description: [The last Thule: a journey towards the roots of the law] The mythical geographical place of the last Thule has been reinterpreted in modern times from a nationalist perspective and, with the contribution of theosophy and occultist thought, has landed in the twentieth-century to support the theses of the Aryan myth. The revival of the sources of antiquity makes it possible to reconstruct its authentic meaning and to glimpse in it an openness to otherness and the transcendent, indispensable conditions for the recovery of the foundation of law.
A Supersymmetric Lagrangian for Fermionic Fields with Mass Dimension One
Creators: name: Wunderle, Kai E.
name: Dick, Rainer
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present the derivation of a supersymmetric model for fermionic fields with integer valued mass dimension based on a general superfield with one free spinor index. First, we demonstrate that it is impossible to formulate such a model based on a general scalar superfield. This is due to problems constructing a Lagrangian containing a kinetic term for the fermionic mass dimension one field, as well as problems deriving a consistent second quantisation. We then develop a formalism based on a general superfield with one free spinor index. We systematically derive all associated chiral and anti-chiral superfields up to third order in covariant derivatives. Using this formalism we are able to construct a supersymmetric on-shell Lagrangian that contains a kinetic term for the fermionic fields with mass dimension one. We then derive the corresponding on-shell supercurrent and succeed to formulate a consistent second quantisation for the component fields. Finally, we present our result for a supersymmetric Hamiltonian. As the Lagrangian is by construction supersymmetric and the Hamiltonian was derived from the Lagrangian using the supersymmetry algebra the Hamiltonian must be positive definite.
description: 30 pages, added references
Additional file 1 of Giotto: a toolbox for integrative analysis and visualization of spatial expression data
Creators: name: Dries, Ruben
name: Zhu, Qian
name: Dong, Rui
name: Eng, Chee-Huat Linus
name: Li, Huipeng
name: Liu, Kan
name: Fu, Yuntian
name: Zhao, Tianxiao
name: Sarkar, Arpan
name: Bao, Feng
name: George, Rani E.
name: Pierson, Nico
name: Cai, Long
name: Yuan, Guo-Cheng
Publisher: name: figshare
Year: 2021
Subjects: subject: Artificial Intelligence and Image Processing
subject: FOS: Computer and information sciences

description: Additional file 1. Supplementary Figures. Supplementary figures and legends.
Additional file 1 of Effects of the COVID-19 pandemic on medical students: a multicenter quantitative study
Creators: name: Harries, Aaron J.
name: Lee, Carmen
name: Jones, Lee
name: Rodriguez, Robert M.
name: Davis, John A.
name: Boysen-Osborn, Megan
name: Kashima, Kathleen J.
name: N. Kevin Krane
name: Rae, Guenevere
name: Kman, Nicholas
name: Langsfeld, Jodi M.
name: Juarez, Marianne
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 1: Table S1. Survey Instrument
Einsamkeit – nicht nur ein Problem der Älteren
Creators: name: Berngruber, Anne
name: Pavlovic, Tijana
Publisher: name: Zenodo
Year: 2023

description: Soziale Isolation und Gefühle von Einsamkeit können gravierende Auswirkungen auf die psychische Gesundheit und Entwicklung von Menschen haben. Üblicherweise werden Einsamkeit und Isolation mit älteren Menschen assoziiert und weniger mit Kindern und Jugendlichen. In den letzten Jahren hat sich die Aufmerksamkeit gegenüber diesen Themen jedoch stärker jungen Menschen zugewandt. In ihrem Vortrag wendet sich Dr. Anne Berngruber vom DJI in München u.a. folgenden Fragen zu: Was wissen wir, was wissen wir nicht? Wen trifft es? Und sind Einsamkeit und Isolation überhaupt dasselbe?
Examining the effectiveness of an online training course for coaches of a type 2 diabetes prevention program
Creators: name: Grieve, Natalie
Publisher: name: University of British Columbia
Year: 2022

description: Small Steps for Big Changes (SSBC) is a community-based diabetes prevention program. SSBC utilizes a motivational interviewing (MI) counselling style and a structured diet and exercise curriculum which aims to empower healthy behavioural modifications and prevent type 2 diabetes (T2D). SSBC coaches (ie., YMCA staff and volunteers) require specific training to deliver the program to clients with high fidelity. An electronic learning (e-learning) platform to deliver training to SSBC coaches was developed to improve flexibility, reach, and accessibility of the program. While e-learning has shown to be an effective mode of teaching content to health professionals, less is known in the context of diabetes prevention coaches. This study aimed to assess the effectiveness of the SSBC e-learning platform. Twenty coaches were recruited through existing fitness facilities to participate in the online SSBC coach training which included completing pre- and post-training questionnaires, seven online modules of content and a mock client session. Knowledge regarding MI (Mpre=3.30±1.95, Mpost=5.90±1.29; p < 0.01), SSBC content (Mpre= 5.15±2.23, Mpost =8.60±0.94; p < 0.01), and T2D (Mpre =6.95±1.57, Mpost =8.25±0.72; p < 0.01), in addition to self-efficacy to deliver the program (Mpre =7.93±1.51, Mpost=9.01±1.00; p < 0.01) all significantly increased from pre- to post e-learning training. Participants reported positively on the user satisfaction and feedback questionnaire with a mean score of 4.58/5 (SD = 0.36) across the five levels of satisfaction. These findings suggest e-learning platforms are a promising mode of training to teach diabetes prevention program knowledge, counselling skills, and to bolster confidence to deliver diabetes prevention programs, with high levels of satisfaction among users. This e-learning platform will allow SSBC to effectively train coaches and permit feasible expansion of SSBC, ultimately reaching more adults living with prediabetes.
Process-Integrated Lubrication in Sheet Metal Forming
Creators: name: Lachmayer, Roland
name: Behrens, Bernd-Arno
name: Ehlers, Tobias
name: Müller, Philipp
name: Althaus, Philipp
name: Oel, Marcus
name: Farahmand, Ehsan
name: Gembarski, Paul Christoph
name: Wester, Hendrik
name: Hübner, Sven
Publisher: name: Basel : MDPI
Year: 2022
Subjects: subject: additive manufacturing (AM)
subject: deep-drawing
subject: design for additive manufacturing (DfAM)
subject: functional integration
subject: laser powder bed fusion (LPBF)
subject: lubrication
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau
subject: Dewey Decimal Classification::500 | Naturwissenschaften::570 | Biowissenschaften, Biologie

description: The deep-drawability of a sheet metal blank is strongly influenced by the tribological conditions prevailing in a deep-drawing process. Therefore, new methods to influence the tribology represent an important research topic. In this work, the application of a process-integrated lubrication in a deep-drawing process is investigated. Most promising geometries of the lubrication channels and outlet openings are first identified by means of numerical simulation at the example of a demonstrator process. Cylindrical test specimens with the specified channel geometries are additively manufactured and installed in a strip drawing test stand. Additive manufacturing enables the possibility of manufacturing complex channel geometries which cannot be manufactured by conventional methods. A hydraulic metering device for conveying lubricant is connected to the cylindrical test specimens. Thus, hydraulically lubricated strip drawing tests are performed. The tests are evaluated according to the force curves and the fluid mechanical buildup of pressure cushion. The performance of process-integrated lubrication is thus analyzed and evaluated. By means of a coupled forming and SPH simulation, the lubrication channels could be optimally designed. From the practical tests, it could be achieved that the drawing force decreases up to 27% with pressure cushion build up. In this research, a hydraulic lubrication in the area of highest contact normal stresses is the most optimal process parameter regarding friction reduction.
On the dynamical behavior of the ABC model
Creators: name: Bertini, L.
name: Cancrini, N.
name: Posta, G.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Probability (math.PR)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: Primary 60K35, 82C20, Secondary 82C22, 60B15

description: We consider the ABC dynamics, with equal density of the three species, on the discrete ring with $N$ sites. In this case, the process is reversible with respect to a Gibbs measure with a mean field interaction that undergoes a second order phase transition. We analyze the relaxation time of the dynamics and show that at high temperature it grows at most as $N^2$ while it grows at least as $N^3$ at low temperature.
Remote Sensing of Wave Overtopping on Dynamic Coastal Structures
Creators: name: Blenkinsopp, Chris E.
name: Baldock, Tom E.
name: Bayle, Paul M.
name: Foss, Ollie
name: Almeida, Luis P.
name: Schimmels, Stefan
Publisher: name: Basel : MDPI
Year: 2022
Subjects: subject: 2D laser scanners
subject: Coastal flooding
subject: Coastal protection
subject: Dynamic cobble berm revetment
subject: Lidar
subject: Overtopping
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: The development of coastal regions combined with rising sea levels is leading to an increasing risk of coastal flooding caused by wave overtopping of natural beaches and engineered coastal structures. Previous measurements of wave overtopping have been obtained for static coastal structures using fixed current meters and depth sensors or tanks. These are unsuitable for dynamically stable coastal protection structures however, because the geometry of these structures is expected to evolve under wave action. This study investigates the potential to use elevated 2D laser scanners (Lidar) to remotely sense the flow volumes overtopping the time-varying crest of a porous dynamic cobble berm revetment. Two different analysis methods were used to estimate the wave-by-wave overtopping volumes from measurements of the time-varying free surface elevation with good agreement. The results suggest that the commonly used EurOtop parameterisation can be used to estimate overtopping discharge to an acceptable precision. An advantage of the remote sensing approach reported here is that it enables the spatial distribution of overtopping discharge and infiltration rate to be measured. It was found that the overtopping discharge on a porous dynamic revetment decays rapidly landward of the structure crest, and that this has implications for safety and structure design.
First Application of Pulse-Shape Analysis to Silicon Micro-Strip Detectors
Creators: name: von Schmid, M.
name: Egelhof, P.
name: Eremin, V.
name: Gernhäuser, R.
name: Kröll, T.
name: Mutterer, M.
name: Pietralla, N.
name: Streicher, B.
name: Weber, M.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The method of pulse-shape analysis (PSA) for particle identification (PID) was applied to a double-sided silicon strip detector (DSSD) with a strip pitch of 300 \{mu}m. We present the results of test measurements with particles from the reactions of a 70 MeV 12C beam impinging on a mylar target. Good separation between protons and alpha particles down to 3 MeV has been obtained when excluding the interstrip events of the DSSD from the analysis.
description: 7 pages, 6 figures, submitted to Nuclear Inst. and Methods in Physics Research A
Nucleon Spin in QCD: Old Crisis and New Resolution
Creators: name: Cho, Y. M.
name: Ge, Mo-Lin
name: Zhang, Pengming
Publisher: name: arXiv
Year: 2010
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We discuss the shortfalls of existing resolutions of the long-standing gauge invariance problem of the canonical decomposition of the nucleon spin to the spin and angular momentum of quarks and gluons. We provide two logically flawless expressions of nucleon spin which have different physical meanings, using the gauge independent Abelian decomposition. The first one is based on the assumption that all gluons (binding and valence gluons) contribute to the nucleon spin, but the second one is based on the assumption that only the binding gluons (and the quarks) contribute to it. We propose the second expression to be the physically correct one.
A Spitzer Survey for Dust in Type IIn Supernovae
Creators: name: Fox, Ori D.
name: Chevalier, Roger A.
name: Skrutskie, Michael F.
name: Soderberg, Alicia M.
name: Filippenko, Alexei V.
name: Ganeshalingam, Mohan
name: Silverman, Jeffrey M.
name: Smith, Nathan
name: Steele, Thea N.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Recent observations suggest that Type IIn supernovae (SNe IIn) may exhibit late-time (>100 days) infrared (IR) emission from warm dust more than other types of core-collapse SNe. Mid-IR observations, which span the peak of the thermal spectral energy distribution, provide useful constraints on the properties of the dust and, ultimately, the circumstellar environment, explosion mechanism, and progenitor system. Due to the low SN IIn rate (<10% of all core-collapse SNe), few IR observations exist for this subclass. The handful of isolated studies, however, show late-time IR emission from warm dust that, in some cases, extends for five or six years post-discovery. While previous Spitzer/IRAC surveys have searched for dust in SNe, none have targeted the Type IIn subclass. This article presents results from a warm Spitzer/IRAC survey of the positions of all 68 known SNe IIn within a distance of 250 Mpc between 1999 and 2008 that have remained unobserved by Spitzer more than 100 days post-discovery. The detection of late-time emission from ten targets (~15%) nearly doubles the database of existing mid-IR observations of SNe IIn. Although optical spectra show evidence for new dust formation in some cases, the data show that in most cases the likely origin of the mid-IR emission is pre-existing dust, which is continuously heated by optical emission generated by ongoing circumstellar interaction between the forward shock and circumstellar medium. Furthermore, an emerging trend suggests that these SNe decline at ~1000--2000 days post-discovery once the forward shock overruns the dust shell. The mass-loss rates associated with these dust shells are consistent with luminous blue variable (LBV) progenitors.
description: Accepted for publication to ApJ, 17 pages, 10 figures, 10 tables
Wilson Line Picture of Levin-Wen Partition Functions
Creators: name: Burnell, F. J.
name: Simon, Steven H.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Levin and Wen [Phys. Rev. B 71, 045110 (2005)] have recently given a lattice Hamiltonian description of doubled Chern-Simons theories. We relate the partition function of these theories to an expectation of Wilson loops that form a link in 2+1 dimensional spacetime known in the mathematical literature as Chain-Mail. This geometric construction gives physical interpretation of the Levin-Wen Hilbert space and Hamiltonian, its topological invariance, exactness under coarse-graining, and how two opposite chirality sectors of the doubled theory arise.
description: Final published version; Appendix added
On quantum maps into quantum semigroups
Creators: name: Soltan, Piotr M.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Operator Algebras (math.OA)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: 20G42, 46L89

description: We analyze the recent examples of quantum semigroups defined by M.M. Sadr who also brought up several open problems concerning these objects. These are defined as quantum families of maps from finite sets to a fixed compact quantum semigroup. We show that these are special cases of free products of quantum semigroups. This way we can answer all the questions stated by M.M. Sadr. Along the way we discuss the question whether restricting the comultiplication of a compact quantum group to a unital $\mathrm{C}^*$-subalgebra defines such a structure on the subalgebra. In the last section we show that the quantum family of all maps from a non-classical finite quantum space to a quantum group (even a finite classical group) might not admit any quantum group structure.
description: Many typos corrected. Added a section on generalization of previous results to quantum families of maps from non-classical sets
Constructing near-horizon geometries in supergravities with hidden symmetry
Creators: name: Kunduri, Hari K.
name: Lucietti, James
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We consider the classification of near-horizon geometries in a general two-derivative theory of gravity coupled to abelian gauge fields and uncharged scalars in four and five dimensions, with one and two commuting rotational symmetries respectively. Assuming that the theory of gravity reduces to a 3d non-linear sigma model (as is typically the case for ungauged supergravities), we show that the functional form of any such near-horizon geometry may be determined. As an example we apply this to five dimensional minimal supergravity. We also construct an example of a five parameter near-horizon geometry solution to this theory with S^1 X S^2 horizon topology. We discuss its relation to the near-horizon geometries of the yet to be constructed extremal black rings with both electric and dipole charges.
description: Latex, 30 pages. v2: discussion in section 5 modified and improved, other minor changes, references added
The Metric Anomaly of Analytic Torsion on Manifolds with Conical Singularities
Creators: name: Mueller, Werner
name: Vertman, Boris
Publisher: name: arXiv
Year: 2010
Subjects: subject: Spectral Theory (math.SP)
subject: FOS: Mathematics
subject: 58J52, 34B24

description: In this paper we study the analytic torsion of an odd-dimensional manifold with isolated conical singularities. First we show that the analytic torsion is invariant under deformations of the metric which are of higher order near the singularities. Then we identify the metric anomaly of analytic torsion for a bounded generalized cone at its regular boundary in terms of spectral information of the cross-section. In view of previous computations of analytic torsion on cones, this leads to a detailed geometric identification of the topological and spectral contributions to analytic torsion, arising from the conical singularity. The contribution exhibits a torsion-like spectral invariant of the cross-section of the cone, which we study under scaling of the metric on the cross-section.
description: 48 pages, 3 figures, minor remarks and references added
Stochastic modeling of geometric imperfections for buckling analysis of suction buckets
Creators: name: Böhm, M.
name: Schaumann, P.
Publisher: name: Bristol : IOP Publ.
Year: 2022
Subjects: subject: Geometry
subject: Offshore oil well production
subject: Stochastic systems
subject: White noise
subject: Buckling analysis
subject: Konferenzschrift
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Recently, suction buckets have become a very prominent foundation for bottom fixed and floating offshore wind turbines. They are embedded with an installation force that stems from water evacuation inside the bucket. This internal negative pressure leads to a high risk of structural buckling. The buckling strength is significantly reduced by geometric imperfections. In previous work, equivalent geometric imperfection forms were introduced and the lower bound was evaluated. However, it has not yet been possible to identify a generally appropriate imperfection form. A probabilistic design approach based on realistic imperfections was not yet considered for suction buckets. Therefore, in this work, a stochastic modeling approach is introduced, which bases on measured data. The imperfection is decomposed to the half-wave cosine Fourier representation. Realizations of the imperfection pattern are generated by filtering white noise with the amplitude spectrum. They are then applied as out of plane deviations on a geometrically and materially nonlinear finite element model and evaluated. The resulting buckling pressure distribution can then be evaluated for different reliability levels. By considering more realistic imperfections and a plastic soil model, the buckling pressure increases by up to a factor of two compared to the conservative stress-based buckling approach.
Monte Carlo simulation of growth of hard-sphere crystals on a square pattern
Creators: name: Mori, Atsushi
Publisher: name: arXiv
Year: 2010
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Monte Carlo simulations of the colloidal epitaxy of hard spheres (HSs) on a square pattern have been performed. This is an extension of previous simulations; we observed a shrinking intrinsic stacking fault running in an oblique direction through the glide of a Shockley partial dislocation terminating its lower end in fcc (001) stacking [Mori et al., Molec. Phys. 105 (2007) 1377], which was an answer to a question why the defect in colloidal crystals reduced by gravity [Zhu et al., Nature 387 (1997) 883]. We have resolved one of shortcomings of the previous simulations; the driving force for fcc (001) stacking, which was stress from a small periodic boundary simulation box, has been replaced with the stress from a pattern on the bottom. We have observed disappearance of stacking fault in this realizable condition. Sinking of the center of gravity has been smooth and of a single relaxation mode under the condition that the gravitational energy mgd is slightly less than the thermal energy kT. In the snapshots tetrahedral structures have appeared often, suggesting formation of staking fault tetrahedra.
description: 15 pages, 6 figures; 16th International Conference on Crystal Growth; J. Cryst. Growth, in press
A new method to improve raw water turbidity removal efficiency in sedimentation units with continuous discharges and flow recirculation
Creators: name: Ridwan
name: Bachtiar, Vera S.
name: Reri Afrianita
name: Indriani, Rifka
Publisher: name: Faculty of Engineering, Khon Kaen University
Year: 2023
Subjects: Improved efficiency
Turbidity removal
Raw water
CDF method sedimentation
CDF flow recirculation

description: Engineering and Applied Science Research, 50, 3, 213-219
A chiral symmetry breaking AdS / QCD model with scalar interactions
Creators: name: Vega, Alfredo
name: Schmidt, Ivan
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider chiral symmetry breaking AdS / QCD models with cubic and quartic potentials in the scalar sector and a z dependent mass for scalars in the bulk. In these models it is possible to get good mesonic spectra using current quark masses.
Pain and loneliness as obstacles to physical activity : time sampling during the COVID-19 pandemic
Creators: name: Broen, Tiana
Publisher: name: University of British Columbia
Year: 2022

description: The COVID-19 pandemic has threatened physical and mental health across the lifespan and highlighted the importance of safe everyday behaviours that individuals may engage in to maintain health and wellbeing. One health-promoting behaviour that has been encouraged by health officials during the pandemic is physical activity; however, research indicates that physical activity behaviours have decreased significantly during this time. The current study aimed to extend research on between-person differences in physical activity behaviours and barriers to physical activity by examining self-reported pain and loneliness on active vs. less-active days. To capture life as it is lived, time-varying associations of loneliness, subjective pain, and physical activity indicators were examined as participants went about their daily lives. It was hypothesized that individuals who reported more loneliness or subjective pain on a particular day would take fewer steps and engage in less moderate-to-vigorous physical activity that same day. Data were collected from April 2020 to August 2020. The sample included 139 community-dwelling Canadian adults (Mage = 40.65 years, SD = 18.37 , range = 18-83 years). Each evening for up to 10 consecutive days, participants reported their loneliness, subjective pain, number of steps, and minutes of moderate-to-vigorous physical activity. In line with the above hypotheses, loneliness and physical activity were significantly linked on a day-to-day basis, such that individuals who felt lonelier on a particular day engaged in less moderate-to-vigorous physical activity that same day. However, we did not find any significant relationships between pain and physical activity. From an intervention perspective, our findings may suggest that it is promising to tackle loneliness on a day-to-day basis to increase physical activity one day at a time. This may be especially relevant during times of mandated social-distancing, such as the COVID-19 pandemic, but also at other times when individuals experience greater feelings of loneliness.
A Dynamical Model for Forecasting Operational Losses
Creators: name: Bardoscia, Marco
name: Bellotti, Roberto
Publisher: name: arXiv
Year: 2010
Subjects: subject: Risk Management (q-fin.RM)
subject: FOS: Economics and business

description: A novel dynamical model for the study of operational risk in banks and suitable for the calculation of the Value at Risk (VaR) is proposed. The equation of motion takes into account the interactions among different bank's processes, the spontaneous generation of losses via a noise term and the efforts made by the bank to avoid their occurrence. Since the model is very general, it can be tailored on the internal organizational structure of a specific bank by estimating some of its parameters from historical operational losses. The model is exactly solved in the case in which there are no causal loops in the matrix of couplings and it is shown how the solution can be exploited to estimate also the parameters of the noise. The forecasting power of the model is investigated by using a fraction $f$ of simulated data to estimate the parameters, showing that for $f = 0.75$ the VaR can be forecast with an error $\simeq 10^{-3}$.
description: 30 pages, 3 figures, 2 tables
Representations and cohomology for Frobenius-Lusztig kernels
Creators: name: Drupieski, Christopher M.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Representation Theory (math.RT)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: 20G42, 20G05, 20G10

description: Let $U_ζ$ be the quantum group (Lusztig form) associated to the simple Lie algebra $\mathfrak{g}$, with parameter $ζ$ specialized to an $\ell$-th root of unity in a field of characteristic $p>0$. In this paper we study certain finite-dimensional normal Hopf subalgebras $U_ζ(G_r)$ of $U_ζ$, called Frobenius-Lusztig kernels, which generalize the Frobenius kernels $G_r$ of an algebraic group $G$. When $r=0$, the algebras studied here reduce to the small quantum group introduced by Lusztig. We classify the irreducible $U_ζ(G_r)$-modules and discuss their characters. We then study the cohomology rings for the Frobenius-Lusztig kernels and for certain nilpotent and Borel subalgebras corresponding to unipotent and Borel subgroups of $G$. We prove that the cohomology ring for the first Frobenius-Lusztig kernel is finitely-generated when $\g$ has type $A$ or $D$, and that the cohomology rings for the nilpotent and Borel subalgebras are finitely-generated in general.
description: 26 pages. Incorrect references fixed