cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Human keratinocytes adapt to ZnO nanoparticles induced toxicity via complex paracrine crosstalk and Nrf2-proteasomal signal transduction
Creators: name: Wu, Zhuoran
name: Yang, Haibo
name: Archana, Gautam
name: Rakshit, Moumita
name: Ng, Kee Woei
name: Tay, Chor Yong
Publisher: name: Taylor & Francis
Year: 2018
Subjects: subject: Space Science
subject: Medicine
subject: Cell Biology
subject: Molecular Biology
subject: Ecology
subject: FOS: Biological sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: Cancer
subject: Plasma Physics

description: Zinc oxide nanoparticles (Nano-ZnO) is currently one of the most extensively used inorganic particles in a wide range of skin care and consumable products. Therefore, examining the biological effects of Nano-ZnO, especially in the non-cytotoxic levels, thus holds important contemporary practical implications. Herein, our study demonstrates that long-term conditioning of human keratinocytes (HaCaTs) to non-cytoxic dose of Nano-ZnO (∼100 nm) can induce an adaptive response, leading to an enhancement of the cells tolerance against cytotoxic level of Nano-ZnO. It was found that the Nano-ZnO induced adaptive alteration is mediated by a strong synergism between the generation of reactive oxygen species (ROS) flares by a sub-population of cells that are loaded with Nano-ZnO and upregulation of several pro-inflammatory transcripts. Further studies revealed activation of the nuclear factor (erythroid-derived 2)-like 2 (Nrf-2) stress response pathway and the associated downstream sustained augmented level of chymotrypsin-like 20 s proteasome activity to be the major mechanism underpinning this phenomenon. Interestingly, these cytoprotective responses can further aid the Nano-ZnO conditioned HaCaT cells to cross-adapt to harmful effects of ultraviolet-A (UVA) by reducing radiation-induced DNA damage. Our findings have unveiled a range of previously undocumented potent and exploitable bioeffects of Nano-ZnO induced ROS mediated signaling within the framework of nano-adaptation.
Bonding trends within ternary Isocoordinate chalcogenide glasses GeAsSe
Creators: name: Opletal, G.
name: Wang, R. P.
name: Russo, S. P.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A structural study is presented of ab-initio molecular dynamics simulations of Ge-As-Se calcogenide glasses performed at the same mean coordination number but differing stoichiometry ranging between Se rich and Se poor glasses. Starting configurations are generated via Reverse Monte Carlo (RMC) simulations of Extended X-ray Absorption Fine Structure (EXAFS) measurements of experimental samples. Structural analysis is presented illustrating the bonding trends found with changing stoichiometry.
description: 26 pages, 9 figures. Submitted to Physical Review B
Seismic modelling of lateral ramp structures
Creators: name: Halladay, Anne-Louise Irene
Publisher: name: Graduate Studies
Year: 2001
Subjects: subject: Additional copy: QE606.5 .C2 H35 2001 (Gallagher)
subject: Faults (Geology) - Alberta
subject: Thrust faults (Geology) - Alberta
subject: Folds (Geology) - Alberta
subject: Seismic prospecting - Mathematical models
subject: Hydrocarbons - Research - Alberta
subject: Geology, Structural - Alberta

description: Bibliography: p. 92-95.
Impact of lithiated cobalt oxide and phosphate nanoparticles on rainbow trout gill epithelial cells
Creators: name: Melby, Eric S.
name: Cui, Yi
name: Borgatta, Jaya
name: Mensch, Arielle C.
name: Hang, Mimi N.
name: Chrisler, William B.
name: Dohnalkova, Alice
name: Van Gilder, John M.
name: Alvarez, Catherine M.
name: Smith, Jordan N.
name: Hamers, Robert J.
name: Orr, Galya
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Biochemistry
subject: Space Science
subject: Medicine
subject: Cell Biology
subject: Molecular Biology
subject: Physiology
subject: FOS: Biological sciences
subject: Ecology
subject: 69999 Biological Sciences not elsewhere classified
subject: Cancer

description: Metal oxide and phosphate nanoparticles (NPs) are ubiquitous in emerging applications, ranging from energy storage to catalysis. Cobalt-containing NPs are particularly important, where their widespread use raises questions about the relationship between composition, structure, and potential for environmental impacts. To address this gap, we investigated the effects of lithiated metal oxide and phosphate NPs on rainbow trout gill epithelial cells, a model for environmental exposure. Lithium cobalt oxide (LCO) NPs significantly reduced cell viability at10 µg/mL, while a 10-fold higher concentration of lithiated cobalt hydroxyphosphate (LCP) NPs was required to significantly reduce viability. Exposure to Li+ and Co2+ alone, at concentrations relevant to ion released from the NPs, did not reduce cell viability and minimally impacted reactive oxygen species (ROS) levels. Both LCO- and LCP-NPs were found within membrane-bound organelles. However, only LCP-NPs underwent rapid and complete dissolution in artificial lysosomal fluid. Unlike LCP-NPs, LCO-NPs significantly increased intracellular ROS, could be found within abnormal multilamellar bodies, and induced formation of intracellular vacuoles. Increased p53 gene expression, measured in individual cells, was observed at sub-toxic concentrations of both LCO- and LCP-NPs, implicating both in inductions of cellular damage and stress at concentrations approaching predicted environmental levels. Our results implicate the intact NP, not the dissolved ions, in the observed adverse effects and show that LCO-NPs significantly impact cell viability accompanied by increase in intracellular ROS and formation of organelles indicative of cell stress, while LCP-NPs have minimal adverse effects, possibly due to their rapid dissolution in acidic organelles.
Reflecting teams and couples: the process of co-creation
Creators: name: Haley, Tanja
Publisher: name: Graduate Studies
Year: 2001
Subjects: subject: RC488.5 .H3424 2001
subject: Additional copy: 370 EDC 2001 HAL
subject: Marital psychotherapy.
subject: Group psychotherapy
subject: Constructivism (Psychology)

description: Bibliography: p. 163-179.
SUPERSTRIPES Self organization of quantum wires in high Tc superconductors
Creators: name: Bianconi, A.
name: Di Castro, D.
name: Saini, N. L.
name: Bianconi, G.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We report experimental evidence for the phase diagram of doped cuprate superconductors as a function of the micro-strain (e) of the Cu-O bond length, measured by Cu K-edge EXAFS, and hole doping (d). This phase diagram shows a QCP at P(e*,d*) where for the micro-strain e larger than the critical value e* charge-orbital-spin stripes and free carriers co-exist. The superconducting phase occurs in the region of critical fluctuations around this QCP. The critical temperature is function of two variables and Tc shows its maximum at the strain driven QCP. The critical fluctuations near this strain QCP give the self-organization of a metallic superlattice of quantum wires "superstripes" that favors the amplification of the critical temperature.
description: 19 pages, 9 figures
Inexact iterative projection methods for linear and nonlinear eigenvalue problems
Creators: name: Rehbein, Nicolai
Publisher: name: Verlag Dr. Hut, München
Year: 2020
Subjects: subject: Jacobi-Davidson method
subject: nonlinear eigenvalue problem
subject: iterative projection method
classificationCode: 500
subject: Naturwissenschaften
classificationCode: 510
subject: Mathematik

description: Wir geben einen allgemeinen Ansatz für das Jacobi-Davidson-Verfahren basierend auf einem beliebigen iterativen Verfahren zum Lösen eines linearen oder nichtlinearen Eigenwertproblems. Die Auswirkung eines inexakten Lösens der Korrekturgleichung wird betrachtet und hieraus kann lineare Konvergenz für drei Fälle von verschiedene Vorbedingungen bewiesen werden. Abschließend wird noch für ein Zwei-Parameter-Eigenwertproblem, welches durch dynamische Systeme mit Totzeit entsteht, ein Funktional eingeführt, welches ähnliche Eigenschaften wie das Rayleigh-Funktional aufweist.
description: We give a general approach of the Jacobi- Davidson method based on any vector iteration to solve a linear or nonlinear eigenvalue problem. The influence of solving the Jacobi-Davidson correction equation inexactly is considered and we can prove linear convergence for three different cases of prerequisites. Finally, a special two parameter eigenvalue problem caused by dynamical systems with time delay is considered. Therefor, a functional which is similar to the Rayleigh functional is introduced.
A tool-book for economic education and trend analysis in Canadian rural communities
Creators: name: Hamstead, Meredith
Publisher: name: Environmental Design
Year: 2001
Subjects: subject: HC120 .E5 H26 2001
subject: Community development - Environmental aspects - Canada
subject: Rural development - Environmental aspects - Canada
subject: Sustainable development - Canada
subject: Economic development - Environmental aspects - Canada
subject: Environmental education
subject: Environmental economics

description: Bibliography: p. 125-134
Degree-inverting involution on full square and triangular matrices
Creators: name: da Fonseca, Lais S.
name: Santulo, Ednei A.
name: Yasumura, Felipe Y.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics

description: In this short note, we classify the degree-inverting involution on the full square and triangular matrices.
(Nearly) Current Status at BKG IVS Data Center
Creators: name: Goltz, Markus
name: Walenta, Anastasiia
name: Thaller, Daniela
Publisher: name: Zenodo
Year: 2023
Subjects: VLBI
EVGA
Data Center

description: Last year has brought several changes for IVS Data Center at BKG. By introducing the new software ingest
 for processing uploaded files, the unified file validation among the IVS Data Centers is enforced. The next
 significant steps in the routine operations have been related to our own service: discontinuity of FTP in favour
 of FTPS and HTTPS. We have arranged a personal account for every uploader on request and supported the
 old user ivsincoming during the protocol transition. At the end, user ivsincoming has been removed as well.
 Corresponding mapping of user accounts and uploads simplifies the data center maintenance. In particular, an
 automatic feedback loop is planned to improve our user support. Also, we monitor the uploads and downloads by
 the users on a daily basis in a straight forward manner. The related illustrations are available on our website. The
 security measures are exercised as required by our internal IT-. It means, that we provide proper supervision to
 secure sensitive data. Also, each incoming file is checked with a virus scanner, where the SWIN files are treated
 separately because of their large file size.
 According to IVS regulations on the Data Centers, we keep our Data Centers in sync with the other IVS Data
 Centers by mirroring them as well as a consistency check to guarantee the data acquisition. Additionally, before
 activating new changes in the ingest software we perform a test with sample data. For these operations, we
 distribute the incoming files to a white and a black list, which are updated continuously.
 Our server setup allows introducing software updates and tests without inflicting the productive environment.
 For instance, the last activities were regarding the validation of the EOP3.0 format from several ACs and proper
 acceptance of the new file name convention for the Level 2 Data Analysis in vgosDb format and SINEX files.
 These data comprise the major part of files uploaded to the Data Center, as a consequence, their validation impact
 the IVS Community at most. We will illustrate, how incoming data is validated at the example of EOP, SINEX
 and SWIN files, where the latter is slightly different.
Introduction to data management plans
Creators: name: Rotheray, Lucia
Publisher: name: Zenodo
Year: 2023

description: Scientific data are the key outcome of research activities at universities, research institutes, and industrial R&D centers. With the recent surge in research data production driven by high-throughput techniques, and the digitalization of scientific methods, data management has become more critical than ever. Moreover, multidisciplinary collaborative research requires the seamless exchange of research data between team members and different laboratories.To ensure that these vast amounts of diverse research data are handled effectively and result in valuable human knowledge and discoveries, it is imperative that proper data management practices are implemented. This ensures that data are produced in a high-quality, reproducible, and well-documented manner so that they can be machine-actionable and reusable in the future.Research Data Management (RDM) refers to the practices used in handling scientific data throughout their lifecycle, from collection to reuse.In this interactive tutorial, we will explain the different stages of the research data lifecycle and identify the best practices for each stage. We will explore the FAIR data principles —Findable, Accessible, Interoperable, and Reusable— and provide insights into their implementation during the research process. In addition, we will introduce the concept of data management plans, which define the data management process during research projects, along with practical tips on the various components and how to comply with funder requirements.You can watch the full presentation on our Youtube channel: https://www.youtube.com/watch?v=1tXOLzRGJFE
A nanoinformatics decision support tool for the virtual screening of gold nanoparticle cellular association using protein corona fingerprints
Creators: name: Afantitis, Antreas
name: Melagraki, Georgia
name: Tsoumanis, Andreas
name: Valsami-Jones, Eugenia
name: Lynch, Iseult
Publisher: name: Taylor & Francis
Year: 2018
Subjects: subject: Biochemistry
subject: Medicine
subject: Pharmacology
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences

description: The increasing use of nanoparticles (NPs) in a wide range of consumer and industrial applications has necessitated significant effort to address the challenge of characterizing and quantifying the underlying nanostructure – biological response relationships to ensure that these novel materials can be exploited responsibly and safely. Such efforts demand reliable experimental data not only in terms of the biological dose-response, but also regarding the physicochemical properties of the NPs and their interaction with the biological environment. The latter has not been extensively studied, as a large surface to bind biological macromolecules is a unique feature of NPs that is not relevant for chemicals or pharmaceuticals, and thus only limited data have been reported in the literature quantifying the protein corona formed when NPs interact with a biological medium and linking this with NP cellular association/uptake. In this work we report the development of a predictive model for the assessment of the biological response (cellular association, which can include both internalized NPs and those attached to the cell surface) of surface-modified gold NPs, based on their physicochemical properties and protein corona fingerprints, utilizing a dataset of 105 unique NPs. Cellular association was chosen as the end-point for the original experimental study due to its relevance to inflammatory responses, biodistribution, and toxicity in vivo. The validated predictive model is freely available online through the Enalos Cloud Platform (http://enalos.insilicotox.com/NanoProteinCorona/) to be used as part of a regulatory or NP safe-by-design decision support system. This online tool will allow the virtual screening of NPs, based on a list of the significant NP descriptors, identifying those NPs that would warrant further toxicity testing on the basis of predicted NP cellular association.
Occupational noise induced hearing loss and engineered noise control : knowledge and perception in the food products manufacturing industry in British Columbia
Creators: name: Nahid, Musarrat
Publisher: name: University of British Columbia
Year: 2009

description: Workplaces primarily rely on hearing protection devices (HPDs) for prevention of occupational noise induced hearing loss (NIHL). This study was initiated to investigate the potential barriers to the implementation of engineered noise control (ENC) which is considered to be the best prevention measure. The study investigated knowledge and perception about NIHL and ENC among decision-makers and workers in the food products manufacturing industry in British Columbia. We contacted company Health and Safety Departments. They were sent packages of questionnaires and return envelopes for distribution among specified subjects. Follow-up phone calls were made to increase participation. Analysis included descriptive statistics, nonparametric methods and simple and multiple logistic regressions. Twenty-two companies and 92 individuals participated (response rate 32.5%). Nearly two-third of the respondents were non-management. A similar proportion was involved in health and safety activities. The majority of the respondents perceived NIHL to be a big disadvantage and said that they would be bothered by it. Respondents were knowledgeable about the effects of noise exposure on health but had poor knowledge about harmful levels of noise, ENC and the limitations of HPDs. They considered HPDs, hearing tests and education to be more effective in preventing NIHL than ENC. Management showed poorer knowledge and lower perception than non-management. Those involved in health and safety performed slightly better than those who were not involved in such activities. Interventions should be undertaken to educate management about ENC options and limitations of HPDs. Regulatory agency should create special branches to help workplaces in choosing suitable ENC.
Building community capacity through group loans for minority populations in Canada
Creators: name: Horvath, Sherry L.
Publisher: name: Environmental Design
Year: 2001
Subjects: subject: HG178.33 .C2 H67 2001
subject: Microfinance - Canada
subject: Community development - Canada
subject: Minorities - Canada - Economic conditions
subject: Social integration - Canada

description: Bibliography: p. 110-115.
Regulation of the src protein tyrosine kinase hck by a substrate protein, the proto-oncogene cbl
Creators: name: Howlett, Christopher Jon
Publisher: name: Graduate Studies
Year: 2001
Subjects: subject: RC268.415 .H69 2001
subject: Proto-oncogenes
subject: Protein-tyrosine kinase
subject: Protein kinases
subject: Phosphorylation
subject: Cancer - Research

description: Bibliography: p. 179-200.
Asteroseismology from multi-month Kepler photometry: the evolved Sun-like stars KIC 10273246 and KIC 10920273
Creators: name: Campante, T. L.
name: Handberg, R.
name: Mathur, S.
name: Appourchaux, T.
name: Bedding, T. R.
name: Chaplin, W. J.
name: García, R. A.
name: Mosser, B.
name: Benomar, O.
name: Bonanno, A.
name: Corsaro, E.
name: Fletcher, S. T.
name: Gaulme, P.
name: Hekker, S.
name: Karoff, C.
name: Régulo, C.
name: Salabert, D.
name: Verner, G. A.
name: White, T. R.
name: Houdek, G.
name: Brandão, I. M.
name: Creevey, O. L.
name: Doğan, G.
name: Bazot, M.
name: Christensen-Dalsgaard, J.
name: Cunha, M. S.
name: Elsworth, Y.
name: Huber, D.
name: Kjeldsen, H.
name: Lundkvist, M.
name: Molenda-Żakowicz, J.
name: Monteiro, M. J. P. F. G.
name: Stello, D.
name: Clarke, B. D.
name: Girouard, F. R.
name: Hall, J. R.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The evolved main-sequence Sun-like stars KIC 10273246 (F-type) and KIC 10920273 (G-type) were observed with the NASA Kepler satellite for approximately ten months with a duty cycle in excess of 90%. Such continuous and long observations are unprecedented for solar-type stars other than the Sun. We aimed mainly at extracting estimates of p-mode frequencies - as well as of other individual mode parameters - from the power spectra of the light curves of both stars, thus providing scope for a full seismic characterization. The light curves were corrected for instrumental effects in a manner independent of the Kepler Science Pipeline. Estimation of individual mode parameters was based both on the maximization of the likelihood of a model describing the power spectrum and on a classic prewhitening method. Finally, we employed a procedure for selecting frequency lists to be used in stellar modeling. A total of 30 and 21 modes of degree l=0,1,2 - spanning at least eight radial orders - have been identified for KIC 10273246 and KIC 10920273, respectively. Two avoided crossings (l=1 ridge) have been identified for KIC 10273246, whereas one avoided crossing plus another likely one have been identified for KIC 10920273. Good agreement is found between observed and predicted mode amplitudes for the F-type star KIC 10273246, based on a revised scaling relation. Estimates are given of the rotational periods, the parameters describing stellar granulation and the global asteroseismic parameters $Δν$ and $ν_{\rm{max}}$.
description: 15 pages, 15 figures, to be published in Astronomy & Astrophysics
Optimal hedging of a perpetual American put with a single trade
Creators: name: Cai, Cheng
name: De Angelis, Tiziano
name: Palczewski, Jan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mathematical Finance (q-fin.MF)
subject: Probability (math.PR)
subject: FOS: Economics and business
subject: FOS: Mathematics
subject: 91G10, 91G80, 60J60, 35R35

description: It is well-known that using delta hedging to hedge financial options is not feasible in practice. Traders often rely on discrete-time hedging strategies based on fixed trading times or fixed trading prices (i.e., trades only occur if the underlying asset's price reaches some predetermined values). Motivated by this insight and with the aim of obtaining explicit solutions, we consider the seller of a perpetual American put option who can hedge her portfolio once until the underlying stock price leaves a certain range of values $(a,b)$. We determine optimal trading boundaries as functions of the initial stock holding, and an optimal hedging strategy for a bond/stock portfolio. Optimality here refers to the variance of the hedging error at the (random) time when the stock leaves the interval $(a,b)$. Our study leads to analytical expressions for both the optimal boundaries and the optimal stock holding, which can be evaluated numerically with no effort.
description: Section 6 added and Section 7 expanded
Supplementary Information from Apes reciprocate food positively and negatively
Creators: name: Benozio, Avi
name: House, Bailey R.
name: Tomasello, Michael
Publisher: name: The Royal Society
Year: 2023
Subjects: subject: 170299 Cognitive Science not elsewhere classified
subject: FOS: Psychology
subject: 60801 Animal Behaviour
subject: FOS: Biological sciences

description: Supplementary Information for Chimpanzees reciprocate food (positively and negatively) in experimental settings
Resonances and viscosity limit for the Wigner-von Neumann type Hamiltonian
Creators: name: Kameoka, Kentaro
name: Nakamura, Shu
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mathematical Physics (math-ph)
subject: Analysis of PDEs (math.AP)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 35J10, 35P25

description: The resonances for the Wigner-von Neumann type Hamiltonian are defined by the periodic complex distortion in the Fourier space. Also, following Zworski, we characterize resonances as the limit points of discrete eigenvalues of the Hamiltonian with a quadratic complex absorbing potential in the viscosity type limit.
Hitchin functionals are related to measures of entanglement
Creators: name: Lévay, Péter
name: Sárosi, Gábor
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: According to the Black Hole/Qubit Correspondence (BHQC) certain black hole entropy formulas in supergravity can be related to multipartite entanglement measures of quantum information. Here we show that the origin of this correspondence is a connection between Hitchin functionals used as action functionals for form theories of gravity related to topological strings, and entanglement measures for systems with a small number of constituents. The basic idea acting as a unifying agent in these seemingly unrelated fields is stability connected to the mathematical notion of special prehomogeneous vector spaces associated to Freudenthal systems coming from simple Jordan algebras. It is shown that the nonlinear function featuring these functionals and defining Calabi-Yau and generalized Calabi-Yau structures is the Freudenthal dual a concept introduced recently in connection with the BHQC. We propose to use the Hitchin invariant for three-forms in 7 dimensions as an entanglement measure playing a basic role in classifying three-fermion systems with seven modes. The representative of the class of maximal tripartite entanglement is the three-form used as a calibration for compactification on manifolds with $G_2$ holonomy. The idea that entanglement measures are related to action functionals from which the usual correspondence of the BHQC follows at the tree level suggests that one can use the BHQC in a more general context.
description: 55 pages, Latex
Hermitian-Lifted Codes
Creators: name: López, Hiram H.
name: Malmskog, Beth
name: Matthews, Gretchen L
name: Piñero-González, Fernando
name: Wootters, Mary
Publisher: name: arXiv
Year: 2020
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences
subject: 94B05, 11T71, 94B27

description: In this paper, we construct codes for local recovery of erasures with high availability and constant-bounded rate from the Hermitian curve. These new codes, called Hermitian-lifted codes, are evaluation codes with evaluation set being the set of $\mathbb{F}_{q^2}$-rational points on the affine curve. The novelty is in terms of the functions to be evaluated; they are a special set of monomials which restrict to low degree polynomials on lines intersected with the Hermitian curve. As a result, the positions corresponding to points on any line through a given point act as a recovery set for the position corresponding to that point.
Surface effects in a semiconductor photonic nanowire and spectral stability of an embedded single quantum dot
Creators: name: Yeo, Inah
name: Malik, Nitin S.
name: Munsch, Mathieu
name: Dupuy, Emmanuel
name: Bleuse, Joël
name: Niquet, Yann-Michel
name: Gérard, Jean-Michel
name: Claudon, Julien
name: Wagner, Édouard
name: Seidelin, Signe
name: Auffèves, Alexia
name: Poizat, Jean-Philippe
name: Nogues, Gilles
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We evidence the influence of surface effects for InAs quantum dots embedded into GaAs photonic nanowires used as efficient single photon sources. We observe a continuous temporal drift of the emission energy that is an obstacle to resonant quantum optics experiments at the single photon level. We attribute the drift to the sticking of oxygen molecules onto the wire, which modifies the surface charge and hence the electric field seen by the quantum dot. The influence of temperature and excitation laser power on this phenomenon is studied. Most importantly, we demonstrate a proper treatment of the nanowire surface to suppress the drift.
Evolving peculiarly human minds : novel evidence from social and developmental psychology
Creators: name: Chudek, Matthew
Publisher: name: University of British Columbia
Year: 2009

description: Accounts of the evolutionary origins of human psychology can be as intriguing as they are difficult to test. The dearth of direct evidence of ancient conditions can in part be alleviated by careful investigation of their consequences for contemporary cognition. Here I report the results of three studies designed to test evolutionary inferences using modern psychological evidence - that is, trying to gain insight into how our brains came to be by looking at how they currently function. Two of these studies report empirical evidence of novel psychological phenomena, predicted a priori by an evolutionary theory. The third attempts further empirical verification of a result previously claimed to have evolutionary significance. The inferential logic of such investigations is very different to that typically employed by psychologists studying the proximate mechanisms behind the same phenomena. I also consider the value and difficulties particular to drawing evolutionary inferences from psychological evidence and lay out criteria for ensuring that these are reliable.
Cathode Position Response of Large-Area Photomultipliers Under a Magnetic Field
Creators: name: Koblesky, T.
name: Roloff, J.
name: Polly, C.
name: Peng, J. C.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: With the increasingly common use of large area PMTs (photomultiplier tubes) for nuclear and particle physics experiments, information on the position dependent magnetic field effects across the PMT's photocathode is important to effectively analyze and understand data collected from PMTs. Using an automated two-dimensional scanner, we have measured the PMT response to an external magnetic field as a function of the cathode position impinged by a collimated light source. This study shows a clear dependence on the cathode position in both collection efficiency and gain of the PMT in the presence of a magnetic field. In particular, a pronounced valley in the collection efficiency is observed for certain locations of the cathode when the magnetic field is transverse to the PMT axis. The pattern of the position dependence is presented for several different magnitudes and orientations of the magnetic field relative to the PMT.
description: 10 pages, 7 figures
A new approach to asymptotics of Maclaurin coefficients of algebraic functions
Creators: name: Raichev, Alexander
name: Wilson, Mark C.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05A15, 05A16

description: We propose a general method for deriving asymptotics of the Maclaurin series coefficients of algebraic functions that is based on a procedure of K. V. Safonov and multivariate singularity analysis. We test the feasibility of this this approach by experimenting on several examples.
Optimierung der Auftragszuordnung in strategischen Projektnetzwerken unter Berücksichtigung von Risiken : dargestellt am Beispiel der Windenergiebranche
Creators: name: Koschate, Bernd-Paul
Publisher: name: TUHH Universitätsbibliothek
Year: 2020
Subjects: subject: Netzwerk
subject: Optimierung
subject: Operations Research
subject: Risikomanagement
subject: Windenergie
subject: Auftragszuordnung
classificationCode: 330
subject: Wirtschaft

description: Aktuelle Methoden befassen sich primär mit der Gestaltung dauerhafter Wertschöpfungsnetzwerke. Die historische Entwicklung zeigt jedoch einen Wandel hin zu projektbezogenen Kooperationen in temporären Produktionsnetzwerken auf, zum Beispiel in der Windenergiebranche. Die vorliegende Arbeit untersucht die Frage, wie eine Gesamtkostenminimierung bestehend aus Komponenten-, Logistik- und Risikokosten anhand einer Netzwerk- und Auftragszuordnungsoptimierung erzielt werden kann. Die entwickelte Methodik umfasst einen Planungsprozess, der die Gesamtkosten im Netzwerk bewertet und darauf basierend die Zuordnung von Lieferanten zu Windparks optimiert. In einer Fallstudie wird die entwickelte Methodik evaluiert und das enthaltene Optimierungsmodell validiert.
description: Optimization of order allocations considering risks in strategic project networks - Applied in the wind energy sector Existing methods focus on the design of enduring value networks. However, the historical development of value chains shows a shift towards project-based cooperation in temporary production networks, for example in the wind energy sector. The present study examines the question of how an overall cost reduction can be achieved consisting of components, logistics and risk related costs using a network and order allocation optimization. The developed methodology covers a planning process that assess-es the total network cost and optimizes the allocation of suppliers and wind farms. In a case study, the methodology is evaluated and the embedded optimization model is validated.
The Impact of non-DLVO Forces on the Onset of Shear Thickening of Concentrated Electrically Stabilized Suspensions
Creators: name: Kaldasch, Joachim
name: Senge, Bernhard
name: Laven, Jozua
Publisher: name: arXiv
Year: 2011
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: This paper exposes an extension of an activation model previously published by the authors. When particles arranged along the compression axis of a sheared suspension, they may overcome the electrostatic repulsion and form force chains associated with shear thickening. A percolation based consideration, allows an estimation of the impact of the force chains on a flowing suspension. It suggests that, similar to mode-coupling models, the suspension becomes unstable before the critical stress evaluated from the activation model is reached. The theory is applicable only to discontinuous shear thickening, and the predictions are compared with results from two experimental studies on aqueous suspensions of inorganic oxides; in one of them hydration repulsion and in the other hydrophobic attraction can be expected. It is shown that the incorporation of non-DLVO forces greatly improve predictions of the shear thickening instability.
Introduction to research data management
Creators: name: Nakhaie, Siamak
Publisher: name: Zenodo
Year: 2023

description: Scientific data are the key outcome of research activities at universities, research institutes, and industrial R&D centers. With the recent surge in research data production driven by high-throughput techniques, and the digitalization of scientific methods, data management has become more critical than ever. Moreover, multidisciplinary collaborative research requires the seamless exchange of research data between team members and different laboratories.To ensure that these vast amounts of diverse research data are handled effectively and result in valuable human knowledge and discoveries, it is imperative that proper data management practices are implemented. This ensures that data are produced in a high-quality, reproducible, and well-documented manner so that they can be machine-actionable and reusable in the future.Research Data Management (RDM) refers to the practices used in handling scientific data throughout their lifecycle, from collection to reuse.In this interactive tutorial, we will explain the different stages of the research data lifecycle and identify the best practices for each stage. We will explore the FAIR data principles —Findable, Accessible, Interoperable, and Reusable— and provide insights into their implementation during the research process. In addition, we will introduce the concept of data management plans, which define the data management process during research projects, along with practical tips on the various components and how to comply with funder requirements.You can watch the full presentation on our Youtube channel: https://youtu.be/ZRTUiIm8VRs
Will Dynamic Arrays finally change the way Models are built?
Creators: name: Bartholomew, Peter
Publisher: name: arXiv
Year: 2020
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Spreadsheets offer a supremely successful and intuitive means of processing and exchanging numerical content. Its intuitive ad-hoc nature makes it hugely popular for use in diverse areas including business and engineering, yet these very same characteristics make it extraordinarily error-prone; many would question whether it is suitable for serious analysis or modelling tasks. A previous EuSpRIG paper examined the role of Names in increasing solution transparency and providing a readable notation to forge links with the problem domain. Extensive use was made of CSE array formulas, but it is acknowledged that their use makes spreadsheet development a distinctly cumbersome task. Since that time, the new dynamic arrays have been introduced and array calculation is now the default mode of operation for Excel. This paper examines the thesis that their adoption within a more professional development environment could replace traditional techniques where solution integrity is important. A major advantage of fully dynamic models is that they require less manual intervention to keep them updated and so have the potential to reduce the attendant errors and risk.
description: 11 Pages, 5 Figures, Numerous Spreadsheet Formulae. This version email address update
Origin of craters on Phoebe: comparison with Cassini's data
Creators: name: Di Sisto, R. P.
name: Brunini, A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Phoebe is one of the irregular satellites of Saturn; the images taken by Cassini-Huygens spacecraft allowed us to analyze its surface and the craters on it. We study the craters on Phoebe produced by Centaur objects from the Scattered Disk (SD) and plutinos escaped from the 3:2 mean motion resonance with Neptune and compare our results with the observations by Cassini. We use previous simulations on trans-Neptunian Objects and a method that allows us to obtain the number of craters and the cratering rate on Phoebe. We obtain the number of craters and the greatest crater on Phoebe produced by Centaurs in the present configuration of the Solar System. Moreover, we obtain a present normalized rate of encounters of Centaurs with Saturn of $\dot F = 7.1 \times 10^{-11}$ per year, from which we can infer the current cratering rate on Phoebe for each crater diameter. Our study and the comparison with the observations suggest that the main crater features on Phoebe are unlikely to have been produced in the present configuration of the Solar System and that they must have been acquired when the SD were depleted in the early Solar System. If this is what happened and the craters were produced when Phoebe was a satellite of Saturn, then it had to be captured, very early in the evolution of the Solar System.
description: Accepted for publication in Astronomy & Astrophysics
Applications of wave resistance theory to problems of ship design
Creators: name: Weinblum, Georg
Publisher: name: TUHH Universitätsbibliothek
Year: 1959
Subjects: subject: Wellenwiderstand
classificationCode: 52.00
subject: Maschinenbau, Energietechnik, Fertigungstechnik: Allgemeines

description: Applications of wave resistance theory to problems of ship design
Simplest random walk for approximating Robin boundary value problems and ergodic limits of reflected diffusions
Creators: name: Leimkuhler, B.
name: Sharma, A.
name: Tretyakov, M. V.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Numerical Analysis (math.NA)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60H35, 65C30, 60H10, 37H10

description: A simple-to-implement weak-sense numerical method to approximate reflected stochastic differential equations (RSDEs) is proposed and analysed. It is proved that the method has the first order of weak convergence. Together with the Monte Carlo technique, it can be used to numerically solve linear parabolic and elliptic PDEs with Robin boundary condition. One of the key results of this paper is the use of the proposed method for computing ergodic limits, i.e. expectations with respect to the invariant law of RSDEs, both inside a domain in $\mathbb{R}^{d}$ and on its boundary. This allows to efficiently sample from distributions with compact support. Both time-averaging and ensemble-averaging estimators are considered and analysed. A number of extensions are considered including a second-order weak approximation, the case of arbitrary oblique direction of reflection, and a new adaptive weak scheme to solve a Poisson PDE with Neumann boundary condition. The presented theoretical results are supported by several numerical experiments.
description: The Annals of Applied Probability (to appear)
Vortical Dynamics of spinning quantum plasmas - Helicity Conservation
Creators: name: Mahajan, Swadesh M.
name: Asenjo, Felipe A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: It is shown that a vorticity, constructed from spin field of a quantum spinning plasma, combines with the classical generalized vorticity (representing the magnetic and the velocity fields) to yield a new grand generalized vorticity that obeys the standard vortex dynamics. Expressions for the quantum or spin vorticity, and for the resulting generalized helicity invariant are derived. Reduction of the rather complex spinning quantum system to a well known and highly investigated classical form opens familiar channels for the delineation of physics peculiar to dense plasmas spanning solid state to astrophysical objects. A simple example is worked out to show that the magnetics of a spinning plasma can be much richer than that of the corresponding classical system.
description: 4 pages
On Biproducts and Extensions
Creators: name: Kashina, Yevgenia
name: Sommerhaeuser, Yorck
Publisher: name: arXiv
Year: 2020
Subjects: subject: Rings and Algebras (math.RA)
subject: Quantum Algebra (math.QA)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 16T05

description: We describe in which ways the Radford biproducts of certain eight-dimensional Yetter-Drinfel'd Hopf algebras over the elementary abelian group of order 4 can be written as extensions of Hopf algebras.
description: 44 pages. See also https://www.math.mun.ca/~sommerh/
The Linearized System for Isometric Embeddings and Its Characteristic Variety
Creators: name: Han, Qing
name: Khuri, Marcus
Publisher: name: arXiv
Year: 2011
Subjects: subject: Differential Geometry (math.DG)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: In this paper we prove a conjecture of Bryant, Griffiths, and Yang concerning the characteristic variety for the determined isometric embedding system. In particular, we show that the characteristic variety is not smooth for any dimension greater than 4. This is accomplished by introducing a smaller yet equivalent linearized system, in an appropriate way, which facilitates analysis of the characteristic variety.
description: Advances in Mathematics, to appear, 29 pages
Non-thermal Particle Acceleration and Emission from Relativistic Jets
Creators: name: Zhang, Hao
Publisher: name: Purdue University Graduate School
Year: 2023
Subjects: High energy astrophysics and galactic cosmic rays

description: Astrophysical jets are collimated streams of magnetized plasma launched from compact objects, such as neutron stars or black holes. These jets, powered by the accretion of surrounding gas onto the compact object, can accelerate particles to extreme energies and produce powerful radiation.
 In this report, I investigate energy dissipation and particle acceleration in two key regions in jets: (i) external shocks which form where jets interact with ambient gas and (ii) internally in the jet where particles are likely to be energized through the process of magnetic reconnection.
 First, I explore inverse Compton scatterings of electrons accelerated at the external shock as a candidate for the high energy emissions from gamma-ray burst afterglows. I consider two sources of seed photons for scattering: synchrotron photons from the blast wave (synchrotron self-Compton) and photon fields external to the shock (external Compton) from the star-forming region in the host galaxy. I develop an analytical model to predict the high-energy spectra from these blasts and reproduce the observed spectra and lightcurves of GRB~190114C. The model implies that inverse Compton can dominate the sub-TeV/TeV emission in this event.
 Second, I study the particle acceleration mechanism of magnetic reconnection internally in astrophysical jets. I employ particle-in-cell (PIC) simulations of 3D relativistic magnetic reconnection. My analysis reveals a novel acceleration mechanism that only operates in 3D that results in faster particle acceleration. Unlike in 2D simulations where particles are trapped in the reconnected plasma and stop being accelerated, a fraction of particles in 3D can escape from this region (along the third direction) and be further accelerated. The escaped particles are characterized by a harder energy spectrum with a higher cutoff compared to those found in previous studies. Based on the PIC simulation findings, I build an analytical model for the particle kinetics, which divides particles into two groups --- one undergoing fast energization in the reconnection upstream region and the other residing in the reconnected plasma without energy change. The model predicts a power-law spectra for both groups of particles. PIC simulations reveal a universal magnetization-independent spectra with $dN/d\gamma\propto \gamma^{-2}$ for the overall particle population. The results demonstrate that relativistic reconnection in jets may be a promising mechanism for generating Ultra-High-energy Cosmic Rays.
Vom Nowland zum Nextland : Eine Methode zur Schulentwicklung im digitalen Wandel : Konzeptpapier
Creators: name: Kortegast, Vanessa
name: Röwert, Ronny
name: Ladwig, Tina Jessica
Publisher: name: Technische Universität Hamburg, ITBH
Year: 2021
Subjects: subject: Schulentwicklung
subject: Digitalisierung
classificationCode: 370
subject: Erziehung, Schul- und Bildungswesen

description: Diese Anleitung zur Methode „Vom Nowland zum Nextland“ dient Schulleitungen und der Schulgemeinschaft als Praxisleitfaden für ein anwendungsnahes, strukturiertes und zukunftsgerichtetes Verfahren für die proaktive Auseinandersetzung mit der Schulentwicklung im digitalen Wandel. Ziel ist es, dass Schulleitungen mit dem Kollegium bzw. der Schulgemeinschaft in einem kreativen Prozess gemeinsame Zielbilder und Entwicklungslinien der eigenen Schule im Handlungsfeld Digitalisierung sowie in der Medienbildung herausarbeiten. Im Rahmen des strukturierten Verfahrens durchlaufen die Teilnehmenden drei angeleitete Arbeitsaufträge, angelehnt an das Format der Zukunftswerkstatt, jedoch bereits operationalisiert. Das Ergebnis ist eine ideenreiche und gemeinsam mit dem Kollegium erarbeitete Landkarte, welche zum einen den Status quo der eigenen Schule aufzeigt, zukünftige Entwicklungslinien und Zielbilder der Schule skizziert und mögliche Maßnahmen zur Erreichung dieser visualisiert.
description: The instructions for the method "From Nowland to Nextland" serves as an easily applicable, structured and future-oriented procedure for school administrators and the school community to proactively deal with school development in the digital age. The aim is to develop common goals for schools in the field of digital transformation and media education in creative ways with the staff and the school community. Within the framework of the structured process, the participants go through three guided work assignments. It results in a mapping of the vision of a school, rich in ideas and developed together with the staff, which shows the status quo of their own school, outlines future lines of development and goals for the school and visualises possible measures to achieve them.