cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Sub-micron pitch variable diffraction grating using nanoporous electrodes and electrophoresis of dye ions
Creators: name: Wong, Richard Tik Fai
Publisher: name: University of British Columbia
Year: 2009

description: One approach to achieve non-mechanical beam steering is to use variable diffraction devices, whose intensity and direction of the outgoing diffractive orders can be actively (typically electronically) altered by modifying the optical properties of the device. Devices with sub-micron features are of particular interest when working with visible wavelengths, since such gratings can, when not activated, produce only an undeflected beam as the output and, when activated, produce diffractive orders at large deflection angles that appear and disappear entirely. Such sub-micron pitch variable diffraction gratings can be achieved by electrophoretically moving dye ions into and out of appropriately patterned transparent electrically-conductive nanoporous electrodes. This study aimed to explore their potential for use in practical devices. One significant technical hurdle associated with these devices has been the irreversible electrochemical reactions that can be induced with an applied voltage difference between the two electrodes exceeding a critical value on the order of 1 V. These reactions are undesirable as they limit the lifetime of the device. However, it was observed that when operating within such a voltage limit the optical response time is undesirably long - on the order of seconds. To better optimize the lifetime and response time of these devices, an electron tunneling model of the electrochemical reaction threshold was developed and verified. This enabled the use of a high speed drive circuit that was able to improve the response time by a factor of 50 without compromising the lifetime of the device. A prototype grating with nanoporous zinc antimonate electrodes and methylene blue dye-methanol solution was fabricated using focused ion beam milling. Modulation of a diffractive order was observed with this prototype, where the exit beam geometry was in good agreement with the model. The diffractive efficiency of the diffractive order was observed to be 3.9×10-3 when in the charged state and 7.9×10-4 when in the uncharged state with an optical switching time of 250 ms. These observations demonstrated the potential of this type of device to achieve large angular deflection and fast operating speed for non-mechanical beam steering applications.
Properties of dust in the Galactic center region probed by AKARI far-infrared spectral mapping - detection of a dust feature
Creators: name: Kaneda, H.
name: Yasuda, A.
name: Onaka, T.
name: Kawada, M.
name: Murakami, N.
name: Nakagawa, T.
name: Okada, Y.
name: Takahashi, H.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We investigate the properties of interstellar dust in the Galactic center region toward the Arches and Quintuplet clusters. With the Fourier Transform Spectrometer of the AKARI/Far-Infrared Surveyor, we performed the far-infrared (60 - 140 cm^-1) spectral mapping of an area of about 10' x 10' which includes the two clusters to obtain a low-resolution (R = 1.2 cm^-1) spectrum at every spatial bin of 30" x 30". We derive the spatial variations of dust continuum emission at different wavenumbers, which are compared with those of the [O III] 88 micron (113 cm^-1) emission and the OH 119 micron (84 cm^-1) absorption. The spectral fitting shows that two dust modified blackbody components with temperatures of ~20 K and ~50 K can reproduce most of the continuum spectra. For some spectra, however, we find that there exists a significant excess on top of a modified blackbody continuum around 80 - 90 cm^-1 (110 - 130 microns). The warmer dust component is spatially correlated well with the [O III] emission and hence likely to be associated with the highly-ionized gas locally heated by intense radiation from the two clusters. The excess emission probably represents a dust feature, which is found to be spatially correlated with the OH absorption and a CO cloud. We find that a dust model including micron-sized graphite grains can reproduce the observed spectrum with the dust feature fairly well.
description: 10 pages, 8 figures, accepted for publication in A&A
Alternating Superconductor--Insulator Transport Characteristics in a Quantum Vortex Chain
Creators: name: Atzmon, Yeshayahu
name: Shimshoni, Efrat
Publisher: name: arXiv
Year: 2011
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Experimental studies of magnetoresistance in thin superconducting strips subject to a perpendicular magnetic field B exhibit a multitude of transitions, from superconductor to insulator and vice versa alternately. Motivated by this observation, we study a theoretical model for the transport properties of a ladder--like superconducting device close to a superconductor--insulator transition. In this regime, strong quantum fluctuations dominate the dynamics of the vortex chain forming along the device. Utilizing a mapping of the vortex system at low energies to one-dimensional (1D) Fermions at a chemical potential dictated by B, we find that a quantum phase transition of the Ising type occurs at critical values of the vortex filling, from a superconducting phase near integer filling to an insulator near 1/2-filling. The current--voltage (I-V) characteristics of the weakly disordered device in the presence of a d.c. current bias I is evaluated, and investigated as a function of B, I, the temperature T and the disorder strength. In the Ohmic regime (I/e << T), the resulting magnetoresistance R(B) exhibits oscillations similar to the experimental observation. More generally, we find that the I-V characteristics of the system manifests a dramatically distinct behavior in the superconducting and insulating regimes.
description: 10 pages, 3 figures. arXiv admin note: substantial text overlap with arXiv:1010.0664
Windkräfte an Überwasserschiffen
Creators: name: Wagner, Bernd
Publisher: name: TUHH Universitätsbibliothek
Year: 1967
Subjects: classificationCode: 52.00
subject: Maschinenbau, Energietechnik, Fertigungstechnik: Allgemeines

description: Windkräfte an Überwasserschiffen
Laser induced electron diffraction: a tool for molecular orbital imaging
Creators: name: Peters, Michel
name: Nguyen-Dang, Tung
name: Charron, Eric
name: Keller, Arne
name: Atabek, Osman
Publisher: name: arXiv
Year: 2012
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We explore the laser-induced ionization dynamics of N2 and CO2 molecules subjected to a few-cycle, linearly polarized, 800\,nm laser pulse using effective two-dimensional single active electron time-dependent quantum simulations. We show that the electron recollision process taking place after an initial tunnel ionization stage results in quantum interference patterns in the energy resolved photo-electron signals. If the molecule is initially aligned perpendicular to the field polarization, the position and relative heights of the associated fringes can be related to the molecular geometrical and orbital structure, using a simple inversion algorithm which takes into account the symmetry of the initial molecular orbital from which the ionized electron is produced. We show that it is possible to extract inter-atomic distances in the molecule from an averaged photon-electron signal with an accuracy of a few percents.
Solving Problems on Generalized Convex Graphs via Mim-Width
Creators: name: Bonomo-Braberman, Flavia
name: Brettell, Nick
name: Munaro, Andrea
name: Paulusma, Daniël
Publisher: name: arXiv
Year: 2020
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: Computational Complexity (cs.CC)
subject: Discrete Mathematics (cs.DM)
subject: Combinatorics (math.CO)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: A bipartite graph $G=(A,B,E)$ is ${\cal H}$-convex, for some family of graphs ${\cal H}$, if there exists a graph $H\in {\cal H}$ with $V(H)=A$ such that the set of neighbours in $A$ of each $b\in B$ induces a connected subgraph of $H$. Many $\mathsf{NP}$-complete problems, including problems such as Dominating Set, Feedback Vertex Set, Induced Matching and List $k$-Colouring, become polynomial-time solvable for ${\mathcal H}$-convex graphs when ${\mathcal H}$ is the set of paths. In this case, the class of ${\mathcal H}$-convex graphs is known as the class of convex graphs. The underlying reason is that the class of convex graphs has bounded mim-width. We extend the latter result to families of ${\mathcal H}$-convex graphs where (i) ${\mathcal H}$ is the set of cycles, or (ii) ${\mathcal H}$ is the set of trees with bounded maximum degree and a bounded number of vertices of degree at least $3$. As a consequence, we can re-prove and strengthen a large number of results on generalized convex graphs known in the literature. To complement result (ii), we show that the mim-width of ${\mathcal H}$-convex graphs is unbounded if ${\mathcal H}$ is the set of trees with arbitrarily large maximum degree or an arbitrarily large number of vertices of degree at least $3$. In this way we are able to determine complexity dichotomies for the aforementioned graph problems. Afterwards we perform a more refined width-parameter analysis, which shows even more clearly which width parameters are bounded for classes of ${\cal H}$-convex graphs.
Metabolic engineering von Clostridium pasteurianum zur Optimierung der Biobutanolproduktion
Creators: name: Schmitz, Rebekka
Publisher: name: TUHH Universitätsbibliothek
Year: 2018
Subjects: subject: Biobutanolproduktion
subject: Metabolic engineering
subject: Clostridium pasteurianum
classificationCode: 500
subject: Naturwissenschaften

description: Clostridium pasteurianum ist hinsichtlich seiner Substratnutzung und seines Produktspektrums von großem industriellem Interesse. In der vorliegenden Arbeit wurden Methoden für das metabolic engineering von C. pasteurianum – insbesondere die Transformation und Gendeletion - analysiert und optimiert. Durch Überexpression der Pyruvatcarboxylase und Deletion der Glyceroldehydratase wurden optimierte Stämme generiert. Die Butanolproduktion konnte selektiv erhöht werden. Darüber hinaus weisen die Ergebnisse auf einen neuartigen Mechanismus der Redoxregulation in C. pasteurianum hin.
description: Clostridium pasteurianum is of great industrial interest regarding its substrate utilization and product spectrum. In this study, methods for metabolic engineering of C. pasteurianum, especially transformation and gene deletion, were analyzed and optimized. Optimized strains were generated by overexpression of pyruvate carboxylase and glycerol dehydratase deletion. Butanol production was selectively increased. Furthermore, our results indicate a novel mechanism of redox regulation in C. pasteurianum.
Weak and Strong Coupling Theories for Polarizable Colloids and Nano-Particles
Creators: name: Bakhshandeh, Amin
name: Santos, Alexandre Pereira dos
name: Levin, Yan
Publisher: name: arXiv
Year: 2011
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: A theory is presented which allows us to accurately calculate the density profile of monovalent and multivalent counterions in suspensions of polarizable colloids or nano-particles. In the case of monovalent ions, we derive a weak-coupling theory that explicitly accounts for the ion-image interaction, leading to a modified Poisson-Boltzmann equation. For suspensions with multivalent counterions, a strong-coupling theory is used to calculate the density profile near the colloidal surface and a Poisson-Boltzmann equation with a renormalized boundary condition to account for the counterion distribution in the far-field. All the results are compared with the Monte Carlo simulations, showing an excellent agreement between the theory and the simulations.
Sailing the boat of tradition : Mi Fu’s revision and innovation in calligraphy
Creators: name: Hudson, Adah Liana
Publisher: name: University of British Columbia
Year: 2009

description: The affiliation of text and visual material in the Chinese calligraphic tradition has a rich history informed by ancient models and continual innovation. My thesis explores the Northern Sung dynasty calligrapher Mi Fu’s (1051-1107) appropriation and contention of the legacy of the Jin Dynasty calligraphers Wang Xizhi (307-365) and Wang Xianzhi (344-388), both icons in the history of Chinese calligraphy. Following the Wang’s rise to fame in the fourth century, historical texts delineate the importance of the father, Wang Xizhi, and discredit the son, Wang Xianzhi. Over half a millennia later, Mi Fu boldly negated this claim, asserting that Wang Xianzhi’s father could not compare to his son’s “transcendent and untrammelled” perfection. My research regarding Mi Fu’s study of the Two Wangs brings forward Mi Fu’s disruption of the conventional adherence to the father’s style, demonstrating Mi Fu’s appropriation of the calligraphic model of Wang Xianzhi. As a scholar-official, Mi Fu’s manipulation of the foundations of calligraphy was a daring transformation of calligraphy into a form of individual expression. Resulting from his study of past calligraphic models Mi Fu developed a distinctive approach to calligraphy. This is exemplified by Mi Fu’s pivotal work Letter About a Coral Tree. Informed by Francois Jullien’s theory of detour and access, I discuss Mi Fu’s stylistic development as an oblique approach guided by ingenious detours. Furthermore, I situate Mi Fu’s manipulation of text through Derrida’s theory of writing and difference. In conceptualizing Mi Fu’s work in this way I consider both the ideological and technical innovation of Mi Fu’s calligraphic oeuvre in eleventh century China.
Heavy flavor production and spectroscopy at LHCb
Creators: name: Milanes, Diego
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We summarize the main measurements performed with the LHCb detector on production and spectroscopy in the heavy flavour sector, using data samples recorded during 2010 and 2011 data taking in proton-proton collisions at $\sqrt s=7$\,TeV .
description: Presented at the 2011 Hadron Collider Physics symposium (HCP-2011), Paris, France, November 14-18 2011, 5 pages, 4 figure
An Attempt to Describe Frequency-Correlations among kHz QPOs and HBOs by Two-Armed Vertical p-mode Oscillations: Case of No Magnetic Field
Creators: name: kato, Shoji
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Trapping of two-armed ($m=2$) vertical p-mode oscillations in relativistic disks are examined. The disks are assumed to be isothermal in the vertical direction, but are truncated at a certain height by the presence of corona. The same issues have been examined in a previous paper (Kato 2012a). In this paper, unlike the previous paper, however, we do not use the approximation that the oscillations are nearly vertical, but limit to a simpler case of no magnetic field. As in the previous paper, the results suggest that the two basic oscillation modes [both are the fundamental ($n=1$) in the vertical direction but in the horizontal direction one is the fundamental ($n_{\rm r}=0$) and the other the first overtone ($n_{\rm r}=1$)] correspond to the twin kHz QPOs. Second, the oscillation mode which is the first overtone $(n=2)$ in the vertical direction and the fundamental in the horizontal direction ($n_{\rm r}=0$) will correspond to the horizontal branch oscillation (HBO) of Z-sources. The latter suggests that the horizontal branch of Z-sources is a sequence of temperature change in disks whose vertical thickness is strongly terminated. The temperature increases leftward along the sequence from the apex between normal and horizontal branches.
description: 17 pages, 8 figures, to be published in PASJ Vol. 65, No. 1 (2013)
title: Wachstum und Reifung in Natur und Gesellschaft: Gaterslebener Begegnung 2011 vom 12. bis 14. Mai 2011
Creators: name: :None
Publisher: name: Wissenschaftliche Verlagsgesellschaft Stuttgart
Year: 2012
Subjects: subject: Wachstumsprozess
subject: Sozialer Wandel
subject: Bevölkerungsentwicklung
subject: Klimaänderung
subject: 300

description: Auf die „Grenzen des Wachstums“ hatte bereits 1972 der Club of Rome aufmerksam gemacht. Seitdem sind die gesellschaftlichen Dimensionen und Folgen eines ungebremsten wirtschaftlichen Wachstums national und international ein zentrales Thema öffentlicher Diskussionen, aber auch politischen Handelns. Auf der Gaterslebener Begegnung 2011 wurde dem quantitativen Parameter „Wachstum“ das qualitative Pendant „Reifung“ zur Seite gestellt und die Thematik in zwei Problemkomplexen „Wachstum in der unbelebten und belebten Natur“ und „Quantitatives und qualitatives Wachstum in der Gesellschaft“ behandelt. Am Anfang stehen „Kritische Anfragen“ an Wissenschaftler, gefolgt von einer sozialwissenschaftlich orientierten Darstellung zu „Wachstum und Nachhaltigkeit“. Die an Natur- und Geisteswissenschaftler, Publizisten, politisch Verantwortliche und interessierte Laien gleichermaßen gerichteten Beiträge umfassen Wachstum und Reifung als grundlegende Eigenschaften organismischen Lebens, aber auch in der Bevölkerungsentwicklung, in der Ökonomie („Wachstum in einer globalisierten Welt“, „Wirtschaftswachstum und Klimawandel“) und sogar im Weltall einerseits sowie in Literatur und Kunst andererseits.
description: Nova Acta Leopoldina: NAL ; Abhandlungen der Deutschen Akademie der Naturforscher Leopoldina, vol. 115, Nummer 393
Universitätsbibliothek der TU Hamburg - Jahresbericht 2021
Creators: name: Rajski, Beate
Publisher: name: TUHH Universitätsbibliothek
Year: 2022
Subjects: subject: TU Hamburg
subject: Universitätsbibliothek
subject: Pandemie
subject: Forschung und Lehre
classificationCode: 000
subject: Allgemeines, Wissenschaft
classificationCode: 020
subject: Bibliotheks- und Informationswissenschaft
classificationCode: 370
subject: Erziehung, Schul- und Bildungswesen

description: 2021 war für die Universitätsbibliothek der TU Hamburg ein weiteres Jahr, das mit vielen Herausforderungen verbunden war. Es war geprägt von der anhaltenden Corona-Pandemie und dem Wechsel in der Bibliotheksleitung. Der Bericht enthält einen Überblick über die Entwicklung und die Dienstleistungen für Forschung und Lehre sowie die Kennzahlen des Jahres 2021.
description: 2021 was another year that was associated with many challenges for the University Library of the TU Hamburg. It was marked by the ongoing Corona pandemic and the change of the library management. The report contains an overview of the development and services for research and teaching as well as key figures from 2021.
Implementation of sustainable development provision in the Yukon First Nations final agreements
Creators: name: Koh, Glenda
Publisher: name: Environmental Design
Year: 2001
Subjects: subject: HD319 .Y8 K64 2001
subject: Sustainable development - Yukon Territory
subject: Land use - Yukon Territory
subject: Natural resources - Yukon Territory
subject: Indians of North America - Yukon Territory - Claims

description: Bibliography: p. 99-104.
Robust Estimation under Linear Mixed Models: The Minimum Density Power Divergence Approach
Creators: name: Saraceno, Giovanni
name: Ghosh, Abhik
name: Basu, Ayanendranath
name: Agostinelli, Claudio
Publisher: name: arXiv
Year: 2020
Subjects: subject: Methodology (stat.ME)
subject: Applications (stat.AP)
subject: FOS: Computer and information sciences
subject: 62F35, 62J05

description: Many real-life data sets can be analyzed using Linear Mixed Models (LMMs). Since these are ordinarily based on normality assumptions, under small deviations from the model the inference can be highly unstable when the associated parameters are estimated by classical methods. On the other hand, the density power divergence (DPD) family, which measures the discrepancy between two probability density functions, has been successfully used to build robust estimators with high stability associated with minimal loss in efficiency. Here, we develop the minimum DPD estimator (MDPDE) for independent but non identically distributed observations in LMMs. We prove the theoretical properties, including consistency and asymptotic normality. The influence function and sensitivity measures are studied to explore the robustness properties. As a data based choice of the MDPDE tuning parameter $α$ is very important, we propose two candidates as "optimal" choices, where optimality is in the sense of choosing the strongest downweighting that is necessary for the particular data set. We conduct a simulation study comparing the proposed MDPDE, for different values of $α$, with the S-estimators, M-estimators and the classical maximum likelihood estimator, considering different levels of contamination. Finally, we illustrate the performance of our proposal on a real-data example.
description: 25 pages, 4 figures, 3 tables
Ten years outdoor exposure of steel in an urban and coastal tropical atmosphere
Creators: name: Jaén, Juan A.
name: Guzmán, Kevin
name: Iglesias, Josefina
name: Manrique, Griselda Caballero
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: FOS: Biological sciences
subject: Marine Biology
subject: Science Policy

description: The mild carbon steel (CS) A-36 and weathering steel A-588 were exposed to the outdoor atmosphere at two different locations in tropical Panama. After a 10-year exposure, the results indicate that the chloride deposition rate and the type of steel play an important role in the corrosion behaviour of tested steels. Both types of steel mainly contain lepidocrocite and goethite as corrosion products at the urban site, while the corrosion products of steels exposed to a moderate marine atmosphere consisted of lepidocrocite, goethite and maghemite. The large fractions of maghemite in the corrosion products of steel A-36 suggest that this phase is interrelated to the higher corrosion rate of CS in the moderate atmospheric environment.
Boundary layer structure in turbulent Rayleigh-Benard convection
Creators: name: Shi, Nan
name: Emran, Mohammad S.
name: Schumacher, Joerg
Publisher: name: arXiv
Year: 2012
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The structure of the boundary layers in turbulent Rayleigh-Benard convection is studied by means of three-dimensional direct numerical simulations. We consider convection in a cylindrical cell at an aspect ratio one for Rayleigh numbers of Ra=3e+9 and 3e+10 at fixed Prandtl number Pr=0.7. Similar to the experimental results in the same setup and for the same Prandtl number, the structure of the laminar boundary layers of the velocity and temperature fields is found to deviate from the prediction of the Prandtl-Blasius-Pohlhausen theory. Deviations decrease when a dynamical rescaling of the data with an instantaneously defined boundary layer thickness is performed and the analysis plane is aligned with the instantaneous direction of the large-scale circulation in the closed cell. Our numerical results demonstrate that important assumptions which enter existing classical laminar boundary layer theories for forced and natural convection are violated, such as the strict two-dimensionality of the dynamics or the steadiness of the fluid motion. The boundary layer dynamics consists of two essential local dynamical building blocks, a plume detachment and a post-plume phase. The former is associated with larger variations of the instantaneous thickness of velocity and temperature boundary layer and a fully three-dimensional local flow. The post-plume dynamics is connected with the large-scale circulation in the cell that penetrates the boundary region from above. The mean turbulence profiles taken in localized sections of the boundary layer for both dynamical phases are also compared with solutions of perturbation expansions of the boundary layer equations of forced or natural convection towards mixed convection. Our analysis of both boundary layers shows that the near-wall dynamics combines elements of forced Blasius-type and natural convection.
description: 23 pages, 19 Postscript figures (Figs. 1,8,12,14,15,17 in reduced quality)
A digital distraction? The role of digital tools and distributed intelligence in woodblock printmaking practice
Creators: name: Chittenden, Tara
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: Science Policy

description: Artists’ adoption of CNC devices and related technologies is making possible novel printmaking processes and variations on techniques. Such changes suggest a need to broaden our understanding of what constitutes a print under contemporary technological conditions. This article looks at the human-machine relationship and the state of creative cognition in the act of woodblock printmaking. Connections between the printmaker’s and programmer’s notions of creating lines indicate different ways of thinking-drawing space and position the resulting 2D print not just as the transfer of ink from block to paper but also existing as lines of code and as a 3D space. By drawing parallels between the embodied yet distributed act of traditional Japanese woodblock printmaking and the experience of CNC computerized carving in the work of Mike Lyon, I explore how woodblock printmaking might facilitate a productive collaboration with digital carving technologies.
ASSESSING THE IMPACT OF FIXANT SOLUTIONS APPLIED AT AIRCRAFT ACCIDENT SITES ON COMPOSITE FRACTOGRAPHIC EVIDENCE
Creators: name: Zimmermann, Natalie
Publisher: name: Purdue University Graduate School
Year: 2023
Subjects: Aerospace materials

description: Composite materials used in the aviation industry are known to be more complex than their metallic predecessors. This impacts not only the design and manufacturing of composite structures, but also the failure studies when these structures fail and break (as may be the case in an aircraft accident). Additionally, when under combustion, composite materials introduce potential health hazards. At elevated temperatures, the fibers can be released, presenting an inhalation hazard. Similarly, the matrix decomposition results in a series of potentially toxic byproducts. When encountering composite fires at aircraft accident sites, a series of protocols have been delineated by the corresponding agencies. These include wearing personal protective equipment as well as the application of so-called fixant solutions over the burning composites, with the latter being the focus of this study. The purpose of the fixant solutions is to provide a film of protection that – in essence – holds down small fibers and prevents them from becoming airborne. While the use of fixant solutions is necessary to protect the health of individuals in the vicinity of burnt composites, the potential detrimental impact the application thereof has on fractographic evidence should also be considered. Experts in the field have voiced concerns regarding the use of fixants, outlining that these chemicals may wash evidence away, cover up evidence, or interfere with imaging methods needed during the failure analysis. The purpose of the conducted research, thus, was to compare the relative impact of four commonly used fixant solutions – namely water, wetted water, polyacrylic acid (PAA), as well as a mixture of water and floor wax – on fractographic features of failed carbon fiber/epoxy composite specimens. Specifically, fractographic evidence of two forms of damage – impact and tension – were evaluated. With this goal, the methodology included steps to manufacture the specimens of interest, introduce the two forms of damage, burn the specimens, apply fixants, and perform the microscopic analysis via a scanning electron microscope (SEM). The fractographic evidence prior and after the application of fixant was evaluated qualitatively and quantitatively. The results showed that the evaluated fixants did influence the fracture surfaces imaged, and in certain cased obscured evidence of interest. Additionally, differences between the fixants were ascertained for both forms of damage evaluated. The water treatment was found to perform the best, minimizing the disruption of evidence. Nonetheless, while the study did answer the research questions and the different treatments were compared, additional areas of research and factors that should be considered were identified.
Hyperparameter Optimization for AST Differencing
Creators: name: Martinez, Matias
name: Falleri, Jean-Rémy
name: Monperrus, Martin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Computing the differences between two versions of the same program is an essential task for software development and software evolution research. AST differencing is the most advanced way of doing so, and an active research area. Yet, AST differencing algorithms rely on configuration parameters that may have a strong impact on their effectiveness. In this paper, we present a novel approach named DAT (Diff Auto Tuning) for hyperparameter optimization of AST differencing. We thoroughly state the problem of hyper-configuration for AST differencing. We evaluate our data-driven approach DAT to optimize the edit-scripts generated by the state-of-the-art AST differencing algorithm named GumTree in different scenarios. DAT is able to find a new configuration for GumTree that improves the edit-scripts in 21.8% of the evaluated cases.
Recovery from binge eating disorder: a grounded theory investigation
Creators: name: Krentz, Adrienne
Publisher: name: Education
Year: 2001
Subjects: subject: AC1 .T484 2001 K74
subject: Additional copy: 370 EDC 2001 KRE
subject: Eating disorders--Treatment.
subject: Eating disorders

description: Bibliography: p. 145-160.
O. KARAOĞLU (Ed.), ALANYA: Kadim Medeniyetler Kalesi. Vakıfbank Kültür Yayınları, İstanbul 202, 490 sayfa (10 tablo, 2 harita, 18 fotoğraf, 14 şekil, 2 ek). ISBN: 9786256385276.
Creators: name: Yıldızlı, Mustafa
Publisher: name: Zenodo
Year: 2023

description: A book review / Kitap tanıtımı.
Creativity and opportunity: how COVID-19 fosters digital dance education
Creators: name: Li, Zihao
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Neuroscience
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: The COVID-19 pandemic has caused major disruptions to every sector, including education. Virtual space during the pandemic has enabled a range of creative events, such as streaming performances, cyber tours, and online activities. Within confined spaces, performing artists have quickly become digital experts in pushing boundaries. This paper examines how tertiary dance teachers and students have coped with the sudden change caused by the COVID-19 pandemic. A total of 120+ university/college dance teachers and students from different continents participated in this study. The study finds that some technologies work better than others, virtual platforms are congruent with current students’ learning preferences, and restrictions in space boost creativity and empathy. This paper shares timely lessons and insights on tools, pedagogies, and strategies for online teaching and learning. It aims to foster further discussions and interrogations of how far we can push practice-based subjects in education by creatively engaging digital technology.
Suspension platform interferometer for the AEI 10\,m prototype: concept, design and optical layout
Creators: name: Dahl, Katrin
name: Kranz, Oliver
name: Heinzel, Gerhard
name: Willke, Benno
name: Strain, Kenneth A
name: Goßler, Stefan
name: Danzmann, Karsten
Publisher: name: arXiv
Year: 2012
Subjects: subject: Optics (physics.optics)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: At present a 10\,m prototype interferometer facility is being set up at the AEI Hannover. One unique feature of the prototype will be the suspension platform interferometer (SPI). The purpose of the SPI is to monitor and stabilise the relative motion between three seismically isolated optical tables. The in-vacuum tables are suspended in an L-shaped configuration with an arm length of 11.65\,m. The design goal of the SPI is to stabilise longitudinal differential displacements to a level of 100\,pm/$\sqrt{\mathrm{Hz}}$ between 10\,mHz and 100\,Hz and relative angular noise of 10\,nrad/$\sqrt{\mathrm{Hz}}$ in the same frequency band. This paper covers the design aspects of the SPI, e.g. cross-coupling between the different degrees of freedom and fibre pointing noise are investigated. A simulation is presented which shows that with the chosen optical design of the SPI all degrees of table motion can be sensed in a fully decoupled way. Furthermore, a proof of principle test of the SPI sensing scheme is shown.
description: 12 pages, 6 figures
Generation of powerful terahertz emission in a beam-driven strong plasma turbulence
Creators: name: Arzhannikov, A. V.
name: Timofeev, I. V.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Generation of terahertz electromagnetic radiation due to coalescence of upper-hybrid waves in the long-wavelength region of strong plasma turbulence driven by a high-current relativistic electron beam in a magnetized plasma is investigated. The width of frequency spectrum as well as angular characteristics of this radiation for various values of plasma density and turbulence energy are calculated using the simple theoretical model adequately describing beam-plasma experiments at mirror traps. It is shown that the power density of electromagnetic emission at the second harmonic of plasma frequency in the terahertz range for these laboratory experiments can reach the level of 1 ${MW/cm}^3$ with 1% conversion efficiency of beam energy losses to electromagnetic emission.
Unsupervised embedding of trajectories captures the latent structure of scientific migration
Creators: name: Murray, Dakota
name: Yoon, Jisung
name: Kojaku, Sadamori
name: Costas, Rodrigo
name: Jung, Woo-Sung
name: Milojević, Staša
name: Ahn, Yong-Yeol
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Human migration and mobility drives major societal phenomena including epidemics, economies, innovation, and the diffusion of ideas. Although human mobility and migration have been heavily constrained by geographic distance throughout the history, advances and globalization are making other factors such as language and culture increasingly more important. Advances in neural embedding models, originally designed for natural language, provide an opportunity to tame this complexity and open new avenues for the study of migration. Here, we demonstrate the ability of the model word2vec to encode nuanced relationships between discrete locations from migration trajectories, producing an accurate, dense, continuous, and meaningful vector-space representation. The resulting representation provides a functional distance between locations, as well as a digital double that can be distributed, re-used, and itself interrogated to understand the many dimensions of migration. We show that the unique power of word2vec to encode migration patterns stems from its mathematical equivalence with the gravity model of mobility. Focusing on the case of scientific migration, we apply word2vec to a database of three million migration trajectories of scientists derived from the affiliations listed on their publication records. Using techniques that leverage its semantic structure, we demonstrate that embeddings can learn the rich structure that underpins scientific migration, such as cultural, linguistic, and prestige relationships at multiple levels of granularity. Our results provide a theoretical foundation and methodological framework for using neural embeddings to represent and understand migration both within and beyond science.
description: 44 pages (main text), 102 pages total. 5 figures (main text), 32 figures in supporting information
Mesanophrys carcini Small & Lynn in Aescht 2001
Creators: name: Xuming Pan
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Protozoa
Ciliophora
Oligohymenophorea
Philasterida
Orchitorphryidae
Mesanophrys
Mesanophrys carcini

description: Mesanophrys cf. carcini Small & Lynn in Aescht, 2001
Fig. 2A–C; Table 1  Description
 Description based on Alabama population: body (in vivo) 35–55 × 15–25 μm, spindle-shaped (Fig. 2A) or pyriform (Fig. 2B), having sharply pointed anterior end and narrowly rounded caudal end (Fig. 2A); variability in shape likely attributable to nutritional conditions (Fig. 2A–B) or division (Fig. 2C). Buccal field 10–15 μm in length or 25–30% of body length. Somatic cilia distributed in a dense lateral field, 5–8 μm long (Fig. 2A). Extrusomes undetectable (Fig. 2A–C). Cytoplasm transparent or grey, granulated; cytoplasmic granules 3–5 μm long, 1–1.5 μm wide, refractive. Macronucleus single, large, 8–13 μm long or 20–30% of body length, 8–12 μm wide or 40–50% of body width, spheroid, centrally located. One micronucleus attached to macronucleus. Locomotion by moving on substrate or swimming in water. Somatic cilia 7 to 10 μm long, ten somatic kineties composed of dikinetids in anterior ⅔ of cell. Membranelle 1 (M1) slightly separated from apex of anterior end, comprising two rows of kinetids each with seven to nine basal bodies (Fig. 2D). M2 bearing three to five longitudinal rows of cilia, with each longitudinal row having six to eight basal bodies (Fig. 2D). M3 posterior to M2, comprising three rows of kinetids (Fig. 2D).
description: Published as part of Xuming Pan, 2016, Seven scuticociliates (Protozoa, Ciliophora) from Alabama, USA, with descriptions of two parasitic species isolated from a freshwater mussel Potamilus purpuratus, pp. 1-19 in European Journal of Taxonomy 249 on page 3, DOI: 10.5852/ejt.2016.249, http://zenodo.org/record/200009
title: Antiparasitic activities of new lawsone Mannich bases
Creators: name: Al Nasr, Ibrahim
name: Jentzsch, Jana
name: Winter, Isabel
name: Schobert, Rainer
name: Ersfeld, Klaus
name: Koko, Waleed S.
name: Mujawah, Adil A. H.
name: Khan, Tariq A.
name: Biersack, Bernhard
Publisher: name: University of Bayreuth
Year: 2019
Subjects: subject: antiparasitic drugs
subject: lawsone
subject: Mannich base
subject: neglected tropical diseases
subject: salicyl derivatives
subject: 500
subject: 540

description: A series of new lawsone Mannich bases derived from salicylaldehydes or nitrofurfural were prepared and tested for their activities against Leishmania major, Toxoplasma gondii, and Trypanosoma brucei brucei parasites. The hydrochloride salts 5a and 6a of the Mannich bases 2a and 3a, derived from unsubstituted salicylaldehyde and long-chained alkyl amines, were selectively and strongly active against T. gondii cells and appear to be new promising drug candidates against this parasite. Compound 6a showed an even higher activity against T. gondii than the known lawsone Mannich base 1b. Compound 4a, derived from salicylaldehyde and 2-methylaminopyridine, was also distinctly active against T. gondii cells. The derivatives 3a (salicyl derivative), 3b (3,5-dichloro-2-hydroxyphenyl derivative), and 3d (5-nitrofuranyl derivative) as well as the hydrochlorides 6a and 6b were also efficacious against T. b. brucei cells with compounds 3a and 3b being more selective for T. b. brucei over Vero cells when compared with the known control compound 1b. The derivatives 5a, 5c, 6a, and 6c proved to be up to five times more active than 1b against L. major promastigotes and up to four times more efficacious against L. major amastigotes.
Deriving the radial-velocity variations induced by stellar activity from high-precision photometry - Test on HD189733 with simultaneous MOST/SOPHIE data
Creators: name: Lanza, A. F.
name: Boisse, I.
name: Bouchy, F.
name: Bonomo, A. S.
name: Moutou, C.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Stellar activity induces apparent radial velocity (RV) variations in late-type main-sequence stars that may hamper the detection of low-mass planets and the measurement of their mass. We use simultaneous measurements of the active planet host star HD189733 with high-precision optical photometry by the MOST satellite and high-resolution spectra by SOPHIE. We apply on this unique dataset a spot model to predict the activity-induced RV variations and compare them with the observed ones. The model is based on the rotational modulation of the stellar flux. A maximum entropy regularization is applied to find a unique and stable solution for the distribution of the active regions versus stellar longitude. The RV variations are synthesized considering the effects on the line profiles of the brightness perturbations due to dark spots and bright faculae and the reduction of the convective blueshifts in the active regions. The synthesized RV time series shows a remarkably good agreement with the observed one although variations on timescales shorter than 4-5 days cannot be reproduced by our model. Persistent active longitudes are revealed by the spot modelling. They rotate with slightly different periods yielding a minimum relative amplitude of the differential rotation of ΔΩ/ Ω= 0.23 \pm 0.10. The method proves capable of reducing the power of the activity-induced RV variations by a factor from 2 to 10 at the rotation frequency and its harmonics up to the third. Thanks to the high-precision space-borne photometry delivered by CoRoT, Kepler, or later PLATO, it is possible to map the longitudinal distribution of active regions in late-type stars and apply the method presented in this paper to reduce remarkably the impact of stellar activity on their RV jitter allowing us to confirm the detection of low-mass planets or refine the measurement of their mass.
description: 13 pages, 7 figures, accepted to Astronomy and Astrophysics
Supplementary Material from Quantitative single molecule analysis of podoplanin clustering in fibroblastic reticular cells uncovers CD44 function
Creators: name: Lim, Shu En
name: Joseph, Megan D.
name: de Winde, Charlotte M.
name: Acton, Sophie E.
name: Simoncelli, Sabrina
Publisher: name: The Royal Society
Year: 2023
Subjects: subject: Biophysics
subject: Cell Biology
subject: Immunology
subject: FOS: Clinical medicine

description: Overall localisation precision of all super-resolution DNA-PAINT images, Number of Single Molecule Localisations per Frame, Comparison of cluster diameter for PDPN proteins in WT and CD44 KO FRCs under control and CLEC-2 stimulation, Nearest neighbour distance (NND) analysis of PDPN proteins, Histograms of PDPN proteins per cluster and Distribution of bright times for the DNA docking â€“ imager sequence.
Electronic phase transitions in Pr$_{0.5}$Ca$_{0.5}$MnO$_3$ epitaxial thin films revealed by resonant soft x-ray scattering
Creators: name: Wadati, H.
name: Geck, J.
name: Schierle, E.
name: Sutarto, R.
name: He, F.
name: Hawthorn, D. G.
name: Nakamura, M.
name: Kawasaki, M.
name: Tokura, Y.
name: Sawatzky, G. A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report the study of magnetic and orbital order in Pr$_{0.5}$Ca$_{0.5}$MnO$_3$ epitaxial thin films grown on (LaAlO$_3$)$_{0.3}$-(SrAl$_{0.5}$Ta$_{0.5}$O$_3$)$_{0.7}$ (LSAT) (011)$_c$. In a new experimental approach, the polarization and energy dependence of resonant soft x-ray scattering are used to reveal significant modifications of the magnetic order in the film as compared to the bulk, namely (i) a different magnetic ordering wave vector, (ii) a different magnetic easy axis and (iii) an additional magnetic reordering transition at low temperatures. These observations indicate a strong impact of the epitaxial strain on the spin order, which is mediated by the orbital degrees of freedom and which provides a promising route to tune the magnetic properties of manganite films. Our results further demonstrate that resonant soft x-ray scattering is a very suitable technique to study the magnetism in thin films, to which neutron scattering cannot easily be applied due to the small sample volume.
description: 5 pages, 3 figures
Cosmicflows-2: SNIa Calibration and H0
Creators: name: Tully, Helene M. Courtois R. Brent
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The construction of the Cosmicflows-2 compendium of distances involves the merging of distance measures contributed by the following methods: (Cepheid) Period-Luminosity, Tip of the Red Giant Branch (TRGB), Surface Brightness Fluctuation (SBF), Luminosity-Linewidth (TF), Fundamental Plane (FP), and Type Ia supernova (SNIa). The method involving SNIa is at the top of an interconnected ladder, providing accurate distances to well beyond the expected range of distortions to Hubble flow from peculiar motions. In this paper, the SNIa scale is anchored by 36 TF spirals with Cepheid or TRGB distances, 56 SNIa hosts with TF distances, and 61 groups or clusters hosting SNIa with Cepheid, SBF, TF, or FP distances. With the SNIa scale zero point set, a value of the Hubble Constant is evaluated over a range of redshifts 0.03 < z < 0.5, assuming a cosmological model with Omega_m = 0.27 and Omega_Lambda = 0.73. The value determined for the Hubble Constant is H0 = 75.9 \pm 3.8 km s-1 Mpc-1.
description: Accepted for publication in The Astrophysical Journal. 11 pages, 8Figures, 5 Tables
The extent of denitrification in groundwater under a manured field in southern alberta
Creators: name: McCallum, Joanne
Publisher: name: Graduate Studies
Year: 2001
Subjects: subject: AC1 .T484 2001 M394
subject: Groundwater - Nitrogen content - Alberta
subject: Agricultural pollution - Alberta
subject: Manures - Environmental aspects
subject: Irrigation farming - Alberta

description: Bibliography: p.109-116.
Path integrals for multiply connected spaces
Creators: name: Scholte-Van De Vorst, Matthew
Publisher: name: University of British Columbia
Year: 2009

description: We derive the propagator for a particle constrained to a torus and to a Klein Bottle. This is accomplished by considering relative symmetries between the desired system and a system for which the propagator is known. This result is checked against the propagator derived via the method of stationary state construction, for which the entire spectrum of the Hamiltonian is required. We also briefly consider the application of further constraints to the systems, and the implications of different symmetries on the same constraint.