cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Usable Specification of Security and Privacy Demands: Matching User Types to Specification Paradigms
Creators: name: Rudolph, Manuel
Polst
name: Feth, Denis
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2019

description: However, formulating their own abstract data protection requirements is already a challenge for them. The mapping of these requirements to concrete setting options in an application is even more challenging—partially because the user interfaces for data protection settings are not tailored to the needs of different user types. This is one of the reasons why only few users make data protection settings regularly and purposefully. In this paper, we describe different specification paradigms for privacy settings and evaluate which paradigm best suits different user types. We investigate with which paradigm a certain user type achieves the best results in terms of objective and perceived correctness, efficiency and satisfaction.
Deformation of the J-matrix method of scattering
Creators: name: Alhaidari, A. D.
Publisher: name: arXiv
Year: 2002
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We construct nonrelativistic J-matrix theory of scattering for a system whose reference Hamiltonian is enhanced by one-parameter linear deformation to account for nontrivial physical effects that could be modeled by a singular ground state coupling.
description: 8 pages, 5 figures
Planet migration in wind-fed accretion disks in binaries
Creators: name: Kulikova, O.
name: Popov, S. B.
name: Zhuravlev, V. V.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Planet migration originally refers to protoplanetary disks, which are more massive and dense than typical accretion disks in binary systems. We study planet migration in an accretion disk in a binary system consisting of a solar-like star hosting a planet and a red giant donor star. The accretion disk is fed by a stellar wind. %, disk self-gravity is neglected. We use the $α$-disk model and consider that the stellar wind is time-dependent. Assuming the disk is quasi-stationary we calculate its temperature and surface density profiles. In addition to the standard disk model, when matter is captured by the disk at its outer edge, we study the situation when the stellar wind delivers matter on the whole disc surface inside the accretion radius with the rate depending on distance from the central star. Implying that a planet experiences classical type I/II migration we calculate migration time for a planet on a circular orbit coplanar with the disk. Potentially, rapid inward planet migration can result in a planet-star merger which can be accompanied by an optical or/and UV/X-ray transient. We calculate timescale of migration for different parameters of planets and binaries. Our results demonstrate that planets can fall on their host stars within the lifetime of the late-type donor for realistic sets of parameters.
description: 10 pages, 6 figures; Subm. to MNRAS
Monte Carlo Study of the Nucleation Process during Zeolite Synthesis
Creators: name: Wu, Minghong G.
name: Deem, Michael W.
Publisher: name: arXiv
Year: 2001
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: An atomic-scale model for silicate solutions is introduced for investigation of the nucleation process during zeolite synthesis in the absence of a structure directing agent. Monte Carlo schemes are developed to determine the equilibrium distribution of silicate cluster sizes within the context of this model. How the nucleation barrier and critical cluster size change with Si monomer concentration is discussed. Distance and angle histograms as well as ring size distributions are calculated and compared with known zeolite structures. The free energies of critical clusters are compared with those for small clusters of alpha-quartz.
description: 28 pages, 11 figures, to appear in J. Chem. Phys
title: Ein Kampf gegen Windmühlen: Qualitative Studie über Informatikabsolvent_innen und ihre Datenprivatheit
Creators: name: Schmidbauer-Wolf, Gina Maria
name: Herbert, Franziska
name: Reuter, Christian
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2019

description: Wie werden eigene private Daten geschützt? Um dieser Frage nachzugehen, wurde in einer qualitativen Studie mit sechs Informatikabsolvent_innen erfragt, wie diese die Privatheit ihrer Daten schützen. Das Ziel der teilstrukturierten Interviews war es einen möglichst breiten Überblick über tatsächlich verwendete Techniken und Technologien zum Schutz der privaten Daten zu gewinnen. Während sich die Vermutung bestätigte, dass alle Teilnehmer_innen ein Bewusstsein für die Brisanz ihrer privaten Daten hatten, unterschieden sich die Definitionen ebendieser privaten Daten sowie das Verhalten, um diese zu schützen. Es konnte beobachtet werden, dass viel Wissen in diesem Bereich nicht zwangsläufig zu einem vorsichtigeren Handeln führt. Mögliche genannte Strategien zum Schutz der eigenen Daten sind: Informiert bleiben, Datensparsamkeit, Vermeidung der Produkte bestimmter Konzerne sowie Resignation. Als Motivation für das jeweilige Verhalten wurden sowohl politische, philosophische, utilitaristische, als auch angstgetriebene Gründe genannt. Letztere können in Angst vor Diebstahl und Angst vor Andersbehandlung unterschieden werden.
Die Mineralogie in ihren neuesten Entdeckungen und Fortschritten in den Jahren 1870 und 1871
Creators: name: Besnard, Anton Franz
Publisher: name: Acta Albertina Ratisbonensia
Year: 2017

description: ...
description: Acta Albertina Ratisbonensia, Bd. 26 (1872): Correspondenzblatt
title: Robotervertrauen: Eine Exploration vertrauensförderlicher Attribute der Robotergestaltung mittels Clusteranalyse
Creators: name: Ullrich, Daniel
name: Diefenbach, Sarah
name: Christoforakos, Lara
name: Surmava, Tinatini
name: Quintes, Cedric
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2019

description: Menschenähnlichkeit gilt in der Gestaltung von Robotern und anderen interaktiven Technologien als ein beliebtes Mittel um Vertrauen zu stärken. Wenngleich auch empirische Studien einen positiven Zusammenhang zwischen anthropomorpher Gestaltung und Vertrauen nahelegen, ist unklar, ob es tatsächlich die Menschenähnlichkeit per se oder weitere, häufig mit Menschenähnlichkeit gemeinsam auftretende Attribute sind, die das Vertrauen seitens der Nutzer fördern. Anhand einer Clusteranalyse von rund 100 Robotern entlang zweier Komponenten von Vertrauen (Kompetenz, Wohlwollen) haben wir vertrauensbildende Attribute der Robotergestaltung näher beforscht. Weiterführende Forschungsfragen und Designimplikationen werden diskutiert.
Pseudosinella duodecimpunctata
Creators: name: H. - J
name: Burkhardt, U.
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Collembola
Entomobryomorpha
Entomobryidae
Pseudosinella
Pseudosinella duodecimpunctata

description: Pseudosinella duodecimpunctata (DENIS 1931)
M a t e r i a l: 2 Expl. Kritsa Katharo Plateau/2.
 Für P. duodecimpunctata liegen Nachweise aus Mittel- und Südeuropa vor, auch aus Höhlen ist sie belegt (CHRISTIAN 1987). Erstnachweis für Kreta.
description: Published as part of H. - J & Burkhardt, U., 2012, Interessante Collembolennachweise aus Ostkreta (Hexapoda, Collembola), pp. 1669-1676 in Linzer biologische Beiträge 44 (2) on page 1671, DOI: 10.5281/zenodo.10106991
Constraint propagation in the family of ADM systems
Creators: name: Yoneda, Gen
name: Shinkai, Hisa-aki
Publisher: name: arXiv
Year: 2001
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The current important issue in numerical relativity is to determine which formulation of the Einstein equations provides us with stable and accurate simulations. Based on our previous work on "asymptotically constrained" systems, we here present constraint propagation equations and their eigenvalues for the Arnowitt-Deser-Misner (ADM) evolution equations with additional constraint terms (adjusted terms) on the right hand side. We conjecture that the system is robust against violation of constraints if the amplification factors (eigenvalues of Fourier-component of the constraint propagation equations) are negative or pure-imaginary. We show such a system can be obtained by choosing multipliers of adjusted terms. Our discussion covers Detweiler's proposal (1987) and Frittelli's analysis (1997), and we also mention the so-called conformal-traceless ADM systems.
description: 11 pages, RevTeX, 2 eps figures
Crash and injury prevention estimates for intersection driver assistance systems in left turn across path/opposite direction crashes in the United States
Creators: name: Bareiss, Max
name: Scanlon, John
name: Sherony, Rini
name: Hampton C. Gabler
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Biochemistry
subject: Space Science
subject: Medicine
subject: Pharmacology
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy

description: Objective: The objective of this research study was to estimate the number of left turn across path/opposite direction (LTAP/OD) crashes and injuries that could be prevented in the United States if vehicles were equipped with an intersection advanced driver assistance system (I-ADAS). Methods: This study reconstructed 501 vehicle-to-vehicle LTAP/OD crashes in the United States that were investigated in the NHTSA National Motor Vehicle Crash Causation Survey (NMVCCS). The performance of 30 different I-ADAS system variations was evaluated for each crash. These variations were the combinations of 5 time-to-collision (TTC) activation thresholds, 3 latency times, and 2 different response types (automated braking and driver warning). In addition, 2 sightline assumptions were modeled for each crash: One where the turning vehicle was visible long before the intersection and one where the turning vehicle was only visible within the intersection. For resimulated crashes that were not avoided by I-ADAS, a new crash delta-V was computed for each vehicle. The probability of Abbreviated Injury Scale 2 or higher injury in any body region (Maximum Abbreviated Injury Scale [MAIS] 2+F) to each front-row occupant was computed. Results: Depending on the system design, sightline assumption, I-ADAS variation, and fleet penetration, an I-ADAS system that automatically applies emergency braking could avoid 18–84% of all LTAP/OD crashes. Only 0–32% of all LTAP/OD crashes could have been avoided using an I-ADAS system that only warns the driver. An I-ADAS system that applies emergency braking could prevent 47–93% of front-row occupants from receiving MAIS 2 + F injuries. A system that warns the driver in LTAP/OD crashes was able to prevent 0–37% of front-row occupants from receiving MAIS 2 + F injuries. The effectiveness of I-ADAS in reducing crashes and number of injured persons was higher when both vehicles were equipped with I-ADAS. Conclusions: This study presents the simulated effectiveness of a hypothetical intersection active safety system on real crashes that occurred in the United States. This work shows that there is a strong potential to reduce crashes and injuries in the United States.
Bipolar in Temporal Argumentation Framework
Creators: name: Budán, Maximiliano C. D.
name: Cobo, Maria Laura
name: Martinez, Diego C.
name: Simari, Guillermo R.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: A Timed Argumentation Framework (TAF) is a formalism where arguments are only valid for consideration in a given period of time, called availability intervals, which are defined for every individual argument. The original proposal is based on a single, abstract notion of attack between arguments that remains static and permanent in time. Thus, in general, when identifying the set of acceptable arguments, the outcome associated with a TAF will vary over time. In this work we introduce an extension of TAF adding the capability of modeling a support relation between arguments. In this sense, the resulting framework provides a suitable model for different time-dependent issues. Thus, the main contribution here is to provide an enhanced framework for modeling a positive (support) and negative (attack) interaction varying over time, which are relevant in many real-world situations. This leads to a Timed Bipolar Argumentation Framework (T-BAF), where classical argument extensions can be defined. The proposal aims at advancing in the integration of temporal argumentation in different application domain.
Inflationary Cosmologies in an Anisotropic Brane World
Creators: name: Paul, Bikash Chandra
Publisher: name: arXiv
Year: 2001
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: A new cosmological solution of the gravitational field equations in the generalized Randall-Sundrum model for an anisotropic brane with Bianchi I geometry and with perfect fluid as matter sources is presented. The matter is described by a scalar field. The solution admits inflationary era and at a later epoch the anisotropy of the universe washes out. We obtain two classes of cosmological scenario, in the first case universe evolves from singularity and in the second case universe expands without singularity.
description: 15 pages, no figures, LaTeX
Novel heterojunction bipolar transistor architectures for the practical implementation of high-efficiency three-terminal solar cells
Creators: name: Linares, Pablo G.
name: Antolín, Elisa
name: Martí, Antonio
Publisher: name: arXiv
Year: 2019
Subjects: subject: Applied Physics (physics.app-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Practical device architectures are proposed here for the implementation of three-terminal heterojunction bipolar transistor solar cells (3T-HBTSCs). These photovoltaic devices, which have a potential efficiency similar to that of multijunction cells, exhibit reduced spectral sensitivity compared with monolithically and series-connected tandem solar cells. In addition, the simplified n-p-n (or p-n-p) structure does not require the use of tunnel junctions. In this framework, four architectures are proposed and discussed in this paper: 1) one in which the top cell is based on silicon and the bottom cell is based on a heterojunction between silicon and III-V nanomaterials; 2) one in which the top cell is made of amorphous silicon and the bottom cell is made of an amorphous silicon-silicon heterojunction; 3) one based on the use of III-V semiconductors aimed at space applications; and 4) one in which the top cell is based on a perovskite material and the bottom cell is made of a perovskite-silicon heterostructure.
Investigations on structure and properties of ge-as-se chalcogenide glasses
Creators: name: Wang, Ting
Publisher: name: The Australian National University
Year: 2015
Subjects: Chalcogenide Glasses
Structure
Thermal Properties
Elastic Properties
Optical Properties

description: Germanium-Arsenic-Selenium chalcogenide glasses are considered as good candidates for photonic applications due to their excellent transparency in the infrared range and high optical nonlinearities. A deep understanding of composition-structure-property relationship in Ge-As-Se ternary system is thus becoming increasingly important, which can serve as a guideline for materials selection. In this work, the structure and various physical properties of GexAsySe100-x-y bulk glasses have been systematically investigated. Raman spectra and EXAFS measurements reveal that chemically ordered network model can be applied to Selenium-rich glasses, but fails to explain bonding characterization of Selenium-poor compositions. Atomic arrangements are more sensitive to the changes in chemical compositions. A tight association between the fragility and the deviation from stoichiometry has been found in the Ge-As-Se system by differential scanning calorimetry. It is shown that chemical compositions with the lowest values of fragility index are far less likely to incur structural relaxation. Those strong glasses are normally chosen as ideal materials for fabrication of stable photonic devices. The variation of density and elastic modulus as a function of mean coordination number both show two transition thresholds, which correlate with floppy-to-rigid phase transition and 2D-to-3D structure transition respectively. The results provide clear evidence that some physical properties of Ge-As-Se chalcogenide glasses are significantly determined by their mean coordination numbers, but could be further tuned by the chemical compositions. The detailed optical investigation shows that the generalized Miller’s rule is a simple but effective approach to estimate the nonlinearities of a broad variety of chalcogenide glasses. Nonlinear properties of these materials exhibit strong dependence upon their optical bandgap in the near infrared. It seems that the highest nonlinearity at telecommunications wavelengths is predictable in chalcogenide glasses.
Intermittency in aging
Creators: name: Buisson, L.
name: Bellon, L.
name: Ciliberto, S.
Publisher: name: arXiv
Year: 2002
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: The fluctuation-dissipation relation (FDR) is measured on the dielectric properties of a gel (Laponite) and of a polymer glass (polycarbonate). For the gel it is found that during the transition from a fluid-like to a solid-like state the fluctuation dissipation theorem is strongly violated. The amplitude and the persistence time of this violation are decreasing functions of frequency. Around $1Hz$ it may persist for several hours. A very similar behavior is observed in polycarbonate after a quench below the glass transition temperature. In both cases the origin of this violation is a highly intermittent dynamics characterized by large fluctuations. The relevance of these results for recent models of aging are discussed.
description: Proceedings of "III workshop on non equilibrium phenomena" (Pisa 2002)
The Future of Dwarf Galaxy Research: What Telescopes Will Discover
Creators: name: Haynes, Martha P.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Dwarf galaxies make ideal laboratories to test galaxy evolution paradigms and cosmological models. Detailed studies of dwarfs across the spectrum allow us to gauge the efficacy of astrophysical processes at play in the lowest mass halos such as gas accretion, feedback, turbulence and chemical enrichment. Future observational studies will deliver unprecedented insights on the orbits of dwarf companions around the Milky Way, on their star formation histories and on the 3-D internal motions of their stars. Over large volumes, we will assess the impact of local environment on baryon cycling and star formation laws, leading to a full picture of the evolution of dwarfs across cosmic time. In combination, future discoveries promise to trace the history of assembly within the Local Group and beyond, probe how stars form under pristine conditions, and test models of structure formation on small scales.
description: 14 pages, 2 figures, invited review at IAU Symposium 344, "Dwarf Galaxies: From the Deep Universe to the Present"
Disordered Systems and Logarithmic Conformal Field Theory
Creators: name: Tabar, M. Reza Rahimi
Publisher: name: arXiv
Year: 2001
Subjects: subject: Condensed Matter (cond-mat)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We review a recent development in theoretical understanding of the quenched averaged correlation functions of disordered systems and the logarithmic conformal field theory (LCFT) in d-dimensions. The logarithmic conformal field theory is the generalization of the conformal field theory when the dilatation operator is not diagonal and has the Jordan form. It is discussed that at the random fixed point the disordered systems such as random-bond Ising model, Polymer chain, etc. are described by LCFT and their correlation functions have logarithmic singularities. As an example we will discuss in detail the application of LCFT to the problem of random-bond Ising model in $ 2 \leq d \leq 4$.
description: 47 pages, latex, to appear in Int. J. of Mod. Phys. A (2003)
A Feature Based Methodology for Variable Requirements Reverse Engineering
Creators: name: Alhamwieh, Anas
name: Ghoul, Said
Publisher: name: arXiv
Year: 2019
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: In the past years, software reverse engineering dealt with source code understanding. Nowadays, it is levered to software requirements abstract level, supported by feature model notations, language independent, and simpler than the source code reading. The recent relevant approaches face the following insufficiencies: lack of a complete integrated methodology, adapted feature model, feature patterns recognition, and Graph based slicing. This work aims to provide some solutions to the above challenges through an integrated methodology. The following results are unique. Elementary and configuration features are specified in a uniform way by introducing semantics specific attributes. The reverse engineering supports feature pattern recognition and requirements feature model graph-based slicing. The slicing criteria are rich enough to allow answering questions of software requirements maintainers. A comparison of this proposed methodology, based on effective criteria, with the similar works, seems to be valuable and competitive: the enrichment of the feature model and feature pattern recognition were never approached and the proposed slicing technique is more general, effective, and practical.
description: 12 pages
Pseudosinella fallax
Creators: name: H. - J
name: Burkhardt, U.
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Collembola
Entomobryomorpha
Entomobryidae
Pseudosinella
Pseudosinella fallax

description: Pseudosinella fallax (BÖRNER 1903)
M a t e r i a l: 1 Expl. Vai Palm Beach.
Grösstenteils aus Südeuropa bekannt.
description: Published as part of H. - J & Burkhardt, U., 2012, Interessante Collembolennachweise aus Ostkreta (Hexapoda, Collembola), pp. 1669-1676 in Linzer biologische Beiträge 44 (2) on page 1671, DOI: 10.5281/zenodo.10106991
Citizen Responses to the Global Financial Crisis: A Comparative Study of Participation and Democratic Support
Creators: name: Cameron, Sarah
Publisher: name: The Australian National University
Year: 2017
Subjects: political science
comparative politics
political behavior
financial crisis
protest
voting
civic engagement
democratic support

description: The global financial crisis was the greatest economic crisis since the Great Depression of the 1930s. The crisis, which had its origins in the United States' housing market crash of 2007, led to global impacts including rising unemployment and underemployment, home foreclosures, fewer opportunities for young people, and a loss of retirement savings. Previous research has examined the role of economic conditions in influencing various types of political behaviors and attitudes, however this has primarily pertained to fluctuations in economic performance during ordinary times. The magnitude of the recent crisis presents an unprecedented opportunity to examine how citizen political engagement in democratic societies is affected by a major economic shock. This thesis investigates how the global financial crisis has affected citizen political behavior - including voting behavior, civic engagement, and political protest - as well as democratic attitudes. To investigate the impact of the crisis, the study uses cross-national survey data fielded before and after the crisis in countries affected by the crisis to varying degrees. This enables a comparison both over time and across countries. Data from the previous two waves of the World Values Survey in 18 democratic countries is used to investigate the crisis impacts on civic engagement, political protest, and democratic support, while data from the Comparative Study of Electoral Systems in 13 countries facilitates an analysis of electoral behavior. Multilevel modeling and other quantitative methods are used to assess how factors at the country and individual level affected citizen political engagement before and after the crisis hit. The thesis tests a number of theories regarding the relationship between economic conditions and political behavior, including grievances and resources approaches. The analysis finds that countries harder hit by the crisis were more likely to experience declines in voter turnout, civic engagement, political protest and democratic support, suggesting the crisis had a demobilizing effect on participation. Similarly, at the individual level there was no evidence of a mobilization amongst those most vulnerable to the crisis, rather it continued to be those with resources that were most likely to participate in politics. The study contributes to our understanding of how economic conditions influence political attitudes and behaviors, and more broadly speaks to the political ramifications of major economic shocks.
Can Schwarzschildean gravitational fields suppress gravitational waves?
Creators: name: Malec, Edward
name: Schaefer, Gerhard
Publisher: name: arXiv
Year: 2001
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Gravitational waves in the linear approximation propagate in the Schwarzschild spacetime similarly as electromagnetic waves. A fraction of the radiation scatters off the curvature of the geometry. The energy of the backscattered part of an initially outgoing pulse of the quadrupole gravitational radiation is estimated by compact formulas depending on the initial energy, the Schwarzschild radius, and the location and width of the pulse. The backscatter becomes negligible in the short wavelength regime.
description: 18 pages, Revtex. Added three references; a new comment in Sec. 7; several misprints corrected. To appear in the Phys. Rev. D
El paradigma médico – filosófico de la correspondencia y la ciencia contemporánea. La concepción del hombre como un microuniverso.
Creators: name: Guirado, Israel Jesús García
name: Rodríguez, Alina Carla Pérez
Publisher: name: figshare
Year: 2019
Subjects: subject: 220206 History and Philosophy of Science (incl. Non-historical Philosophy of Science)
subject: FOS: Philosophy, ethics and religion
subject: 220299 History and Philosophy of Specific Fields not elsewhere classified
subject: 220208 History and Philosophy of the Social Sciences
subject: 220210 History of Philosophy
subject: 29903 Medical Physics
subject: FOS: Physical sciences

description: El objetivo es detectar novedosas teorías establecidas, aplicadas a ls ciencias médicas para analizar epistemiológicamente el paradigma médico-filosófico de la Correspondencia, introduciendo el concepto de hombre como un microcosmos en las medicinas antiguas.
Dither Locking for Acquisition, Tracking and Pointing in Free Space Optics
Creators: name: Courtney-Barrer, Benjamin
Publisher: name: The Australian National University
Year: 2016
Subjects: Dither Locking
Acquisition
Tracking
Pointing
Free Space Optics
FSO
FPGA
Laser
Communications
digital
control
system
coherent
direct
detection
FSM
atmosphere
turbulence
jitter
beam wander

description: With the ever-growing requirement for global infrastructure to support the global flow of information, the field of free space optics has gained significant momentum in the past decade. This Honours thesis investigated a general dither locking method for acquisition, tracking and pointing in the field of free space optics. This scheme has a number of benefits including the flexibility of its implementation, immunity from channel noise coupling in to the pointing feedback, and the ability to perform acquisition, tracking and pointing without the requirement of position sensitive detectors. The theory and potential implementations of this dither locking method were analyzed for various link topologies. A transceiver set-up using a fast steering mirror and corner cube was built and tested in the laboratory under both direct and heterodyne detection schemes, with the dither locking control program implemented digitally on a FPGA. The developed system was capable of locking the beam pointing to μrad precision, and successfully tracked vibrations in a corner cube, showing up-to a 40dB suppression of the induced jitter at low (<20Hz) frequencies. Strong turbulence was also introduced into the channel and our analysis showed that the system had a good capability of tracking the turbulence induced beam wander, even in the presence scintillation. This transceiver system was then integrated with a laser phase stabilization module developed at the University of Western Australia (UWA) and field trialed at the Mount Stromlo Observatory over horizontal channels through the atmosphere. The dither locking system successfully acquired and locked the alignment for free space links over 1km, and with the links alignment locked, the phase stabilization system developed at UWA was able to demonstrate a stabilized free space frequency transfer with a averaged fractional frequency on the order of 10⁻¹⁷ at 1s.
Closed-form sums for some perturbation series involving hypergeometric functions
Creators: name: Saad, Nasser
name: Hall, Richard L.
Publisher: name: arXiv
Year: 2002
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Infinite series of the type Sum{n=1,infinity}(alpha/2)_n_2F_1(-n, b; gamma; y)/(n n!) are investigated. Closed-form sums are obtained for alpha a positive integer alpha=1,2,3, ... The limiting case of b --> infinity, after y is replaced with x^2/b, leads to Sum{n=1,infinity}(alpha/2)_n_1F_1(-n; gamma; x^2)/(n n!). This type of series appears in the first-order perturbation correction for the wavefunction of the generalized spiked harmonic oscillator Hamiltonian H = -(d/dx)^2 + Bx^2 + A/x^2 + lambda/x^alpha, x >=0, alpha, lambda > 0, A >= 0. These results have immediate applications to perturbation series for the energy and wave function of the spiked harmonic oscillator Hamiltonian H = -(d/dx)^2 + Bx^2 + lambda/x^alpha, x >= 0, alpha, lambda > 0.
description: 24 pages, no figures
From LaH10 to room-temperature superconductors
Creators: name: Kostrzewa, M.
name: Szczesniak, K. M.
name: Durajski, A. P.
name: Szczesniak, R.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Thermodynamic parameters of the $\rm LaH_{10}$ superconductor were an object of our interest. $\rm LaH_{10}$ is characterised by the highest experimentally observed value of the critical temperature: $T^{a}_{C}=215$~K ($p_{a}=150$~GPa) and $T^{b}_{C}=260$~K ($p_{b}=190$~GPa). It belongs to the group of superconductors with a~strong electron--phonon coupling ($λ_{a}\sim 2.2$ and $λ_{b}\sim 2.8$). We calculated thermodynamical parameters of this superconductor and found that the values of the order parameter, the thermodynamic critical field, and the specific heat differ significantly from the values predicted by the conventional BCS theory. Due to the specific structure of the Eliashberg function for the hydrogenated compounds, the qualitative analysis suggests that the superconductors of the ${\rm La_δX_{1-δ}H_{10}}$--type (LaXH--type) structure, where ${\rm X}\in\{{\rm Sc},{\rm Y}\}$, would exhibit significantly higher critical temperature than $T_{C}$ obtained for $\rm LaH_{10}$. In the case of LaScH we came to the following assessments: $T^{a}_{C}\in\left<220,267\right>$~K and $T^{b}_{C}\in\left<263,294\right>$~K, while the results for LaYH were: $T^{a}_{C}\in\left<218,247\right>$~K and $T^{b}_{C}\in\left<261,274\right>$~K.
description: 6 pages, 5 figures
Field theoretical study of a spin-1/2 ladder with unequal chain exchanges
Creators: name: Sarkar, Sujit
name: Sen, Diptiman
Publisher: name: arXiv
Year: 2001
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the low-energy properties of a Heisenberg spin-1/2 zigzag ladder with different exchange constants on the two chains. Using a nonlinear sigma-model field theory and abelian bosonization, we find that the excitations are gapless, with a finite spin wave velocity, if the values of the chain exchanges are small. If the chain exchanges are large, the system is gapped, and the energy spectra of the kink and antikink excitations are different from each other.
description: Revtex, 4 pages, 1 eps figure
Mechanistic Insights into Carbon-Carbon Bond Oxidative Reconstruction and Construction
Creators: name: Lee, Zhong Han Richmond
Publisher: name: The Australian National University
Year: 2016
Subjects: Physical chemistry
oxidation & autooxidation
carbon-carbon bond
catalysis
organic chemistry
quantum chemical/ab initio calculations

description: Chemical manipulation of carbon-carbon bond is an expansive subject and overarching theme in chemistry. By all accounts, it takes a broad and concerted experimental and theoretical effort in order to fully comprehend the nature of this chemical bond that is virtually omnipresent in most important molecules. Developing a more intimate understanding and appreciation of the stability and reactivity of carbon-carbon bonds through quantum chemical calculations is therefore the main theme and driver of this thesis. In this thesis, computational quantum chemistry was employed as the tool to assist in the mechanistic investigation of C=C and C-C bond oxidation by environmental oxidants (O3 and O2) and the associated peroxyl ROO• self-reaction chemistry, copper catalysed aerobic photo-oxidation of double, triple and single carbon-carbon bonds, the stereoselective and chemo-divergent construction of C-C bonds, and rhodium catalysed C-C(O) bond formation in Metal Organic Frameworks. It was also used to examine why C-C bonds were not formed during the termination process of radical polymerisation of polyacrylates and decomposition of RAFT-based polymers. The scope of this work is wide but is just the tip of the iceberg on carbon-carbon bond chemistry. This thesis consists of 11 written manuscripts, and is categorised into two parts. The first part focuses on carbon-carbon bond cleavage and oxidative transformation to C(O), so termed ‘oxidative reconstruction’, and the second part on carbon-carbon bond generation or construction in a stereo and chemo-specific manner. To achieve these research goals, extensive and appropiately benchmarked quantum chemical calculations were used to paint an insightful mechanistic picture of the reactions mentioned, which went beyond simply capturing knowledge of the reactivities and properties of carbon-carbon bonds, but also provided clarifications to experiments, and allowed one to make perceptive chemical predictions. This thesis highlights the important role of theory in allowing new scientific ideas to prosper, for instance updating reaction mechanisms that conform to new experimental observations, enabling better catalysts to be designed and strategies to preserve the durability of polymers. In hindsight, each work and chapter strives to take further steps toward bridging gaps in our knowledge of carbon-carbon bond chemistry.
Conformal Two-Point Correlation Functions from the Operator Product Expansion
Creators: name: Fortin, Jean-François
name: Prilepina, Valentina
name: Skiba, Witold
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We compute the most general embedding space two-point function in arbitrary Lorentz representations in the context of the recently introduced formalism in arXiv:1905.00036 and arXiv:1905.00434. This work provides a first explicit application of this approach and furnishes a number of checks of the formalism. We project the general embedding space two-point function to position space and find a form consistent with conformal covariance. Several concrete examples are worked out in detail. We also derive constraints on the OPE coefficient matrices appearing in the two-point function, which allow us to impose unitarity conditions on the two-point function coefficients for operators in any Lorentz representations.
description: 1+26 pages
Verzeichniss der gelehrten Anstalten und Vereine, mit denen der zool.-mineral. Verein in Tauschverbingung gegen das Correspondenzblatt steht
Creators: name: N., N.
Publisher: name: Acta Albertina Ratisbonensia
Year: 2017

description: ...
description: Acta Albertina Ratisbonensia, Bd. 26 (1872): Correspondenzblatt
Pseudosinella immaculata
Creators: name: H. - J
name: Burkhardt, U.
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Collembola
Entomobryomorpha
Entomobryidae
Pseudosinella
Pseudosinella immaculata

description: Pseudosinella immaculata (LIE- PETTERSEN 1896)
M a t e r i a l: 2 Expl. Anatoli.
In Skandinavien in reichen Laubwaldböden nachgewiesen (FJELLBERG 2007). Paläarktisch verbreitet. Erstnachweis für Kreta.
description: Published as part of H. - J & Burkhardt, U., 2012, Interessante Collembolennachweise aus Ostkreta (Hexapoda, Collembola), pp. 1669-1676 in Linzer biologische Beiträge 44 (2) on page 1671, DOI: 10.5281/zenodo.10106991
Gravitational singularities via acceleration: the case of the Schwarzschild solution and Bach's gamma metric
Creators: name: Antoci, S.
name: Liebscher, D. -E.
name: Mihich, L.
Publisher: name: arXiv
Year: 2001
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The so called gamma metric corresponds to a two-parameter family of axially symmetric, static solutions of Einstein's equations found by Bach. It contains the Schwarzschild solution for a particular value of one of the parameters, that rules a deviation from spherical symmetry. It is shown that there is invariantly definable singular behaviour beyond the one displayed by the Kretschmann scalar when a unique, hypersurface orthogonal, timelike Killing vector exists. In this case, a particle can be defined to be at rest when its world-line is a corresponding Killing orbit. The norm of the acceleration on such an orbit proves to be singular not only for metrics that deviate from Schwarzschild's metric, but also on approaching the horizon of Schwarzschild metric itself, in contrast to the discontinuous behaviour of the curvature scalar.
description: 8 pages; text accepted for publication by Astronomische Nachrichten
The Development of Border Regions in Southeast Asia: Cross-border Trade in the Vietnam - Lao PDR Border Areas
Creators: name: Lamijo, Lamijo
Publisher: name: The Australian National University
Year: 2016
Subjects: Border development
regional cooperation
cross-border trade
Lao Bảo

description: The thesis examines the Lao Bảo-Dansavanh cross-border trade and economic activities in the Viet – Lao border areas. For thousands of years the Lao Bảo area has long been a knot in regional trade and saw violent see-saw battles during the US War period. After the end of the Cold War in 1990s, there was new a perspective on how to develop the border not only in the context of conflict resolution but also in terms of regional economic development and integration among the bordering countries in Southeast Asia. Several concept of the economic joint development has become popular in the discussions about the border regions in Southeast Asia since the 1990s, such as growth triangle, growth areas, development triangle area of Cambodia-Laos-Vietnam (CLV), and Greater Mekong Subregion Economic Cooperation Program (GMS-ECP). As a result, borders are once again not viewed as barriers to the relations between bordering nation states but instead; borders are zones of contacts, economic development and cooperation. The implementation of Đổi mới policy in 1986 and GMS-ECP in 1992 played an important role to the development of Lao Bảo- Dansavanh cross-border areas. The development of Lao Bảo cross-border areas is a result of several cross-borders joint projects launched by GMS countries since 1990s, such as the Cross-border Trade Agreement, the East West Economic Corridor, and the Lao Bảo Special Economic and Commercial Area. These agreements brought livelihood to thousands of has benefited not only to the traders, porters (kéo hàng), money changers (đổi tiền), entrepreneurs, and speed up movement of goods, people, and services on both sides of the border. This study focus on the local ethnic groups at the border, namely the Vân Kiều, Pa Kô, and Kado, who have participated the border economic activities. The benefits and opportunities have not been evenly distributed. These people engage in a lower economic chain, such as motor cycle taxi driver (Xe ôm), porters (kéo hàng), and small traders selling unprocessed crops at low price. They seem to be excluded from taking larger profit of border development. While border development has boosted the growth of both cross-border trade and economic activities, this benefit is less than equally distributed among local peoples.
Behaviour of spin-half particles in curved space-time
Creators: name: Mukhopadhyay, Banibrata
Publisher: name: arXiv
Year: 2001
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study the behaviour of spin-half particles in curved space-time. Since Dirac equation gives the dynamics of spin-half particles, we mainly study the Dirac equation in Schwarzschild, Kerr, Reissner-Nordström geometry. Due to the consideration of existence of black hole in space-time (the curved space-time), particles are influenced and equation will be modified. As a result the solution will be changed from that due to flat space.
description: 2 Latex pages, World Scientific Style; ws-p9-75x6-50.cls; To appear in the Proceedings of 9th Marcel Grossman Meeting, Rome, 2000 (World Scientific)
Between Kase and Meto
Creators: name: Rose, Michael
Publisher: name: The Australian National University
Year: 2017
Subjects: subject: Timor
subject: Anthropology
subject: FOS: Sociology

description: Over the past 40 years, life in Timor-Leste has changed radically. Before 1975 most of the population lived in highland villages, spoke local languages, and rarely used money. Today many have moved into urbanised lowlands settlements, and even those whose lives remain dominated by customary ways understand that those of their children will not. For the Atoni Pah Meto of the island’s west, the world was neatly divided into two distinct categories: the meto (indigenous), and the kase (foreign). Now things are less clear. This thesis revolves around seven tales from two years in Timor-Leste’s Oecussi enclave that showcase how, in an age of urbanisation on the island, daily practice emerges from the interplay between these formerly distinct domains. There the good things of the outside world are pursued not through rejecting the meto ways of the village, or collapsing them into the kase, but through the often ritually mediated negotiation of continual crossing between them. Through this method, the people of Oecussi are able to identify in the struggles of lowland life, the comforting and often decisive presence of familiar highland spirits.
Pseudosinella octopunctata BORNER 1901
Creators: name: H. - J
name: Burkhardt, U.
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Collembola
Entomobryomorpha
Entomobryidae
Pseudosinella
Pseudosinella octopunctata

description: Pseudosinella octopunctata BÖRNER 1901
M a t e r i a l: 6 Expl. Molchos, 14 Expl. Vai Palm Beach, 1 Expl. Kritsa Katharo Plateau/1.
Eine typische Art in trockenen, warmen Habitaten (FJELLBERG 2007). Kosmopolit.
description: Published as part of H. - J & Burkhardt, U., 2012, Interessante Collembolennachweise aus Ostkreta (Hexapoda, Collembola), pp. 1669-1676 in Linzer biologische Beiträge 44 (2) on page 1672, DOI: 10.5281/zenodo.10106991
Noise limits in matter-wave interferometry using degenerate quantum gases
Creators: name: Search, Chris P.
name: Meystre, Pierre
Publisher: name: arXiv
Year: 2002
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We analyze the phase resolution limit of a Mach-Zehnder atom interferometer whose input consists of degenerate quantum gases of either bosons or fermions. For degenerate gases, the number of atoms within one de Broglie wavelength is larger than unity, so that atom-atom interactions and quantum statistics are no longer negligible. We show that for equal atom numbers, the phase resolution achievable with fermions is noticeably better than for interacting bosons.
description: 4 pages, 5 figures
In situ spacecraft observations of a structured electron diffusion region during magnetopause reconnection
Creators: name: Cozzani, Giulia
name: Retinò, Alessandro
name: Califano, Francesco
name: Alexandrova, Alexandra
name: Contel, Olivier Le
name: Khotyaintsev, Yuri
name: Vaivads, Andris
name: Fu, Huishan
name: Catapano, Filomena
name: Breuillard, Hugo
name: Ahmadi, Narges
name: Lindqvist, Per-Arne
name: Ergun, Robert E.
name: Torbert, Robert B.
name: Giles, Barbara L.
name: Russell, Christopher T.
name: Nakamura, Rumi
name: Fuselier, Stephen
name: Mauk, Barry H.
name: Moore, Thomas
name: Burch, James L.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: The Electron Diffusion Region (EDR) is the region where magnetic reconnection is initiated and electrons are energized. Because of experimental difficulties, the structure of the EDR is still poorly understood. A key question is whether the EDR has a homogeneous or patchy structure. Here we report Magnetospheric MultiScale (MMS) novel spacecraft observations providing evidence of inhomogeneous current densities and energy conversion over a few electron inertial lengths within an EDR at the terrestrial magnetopause, suggesting that the EDR can be rather structured. These inhomogenenities are revealed through multi-point measurements because the spacecraft separation is comparable to a few electron inertial lengths, allowing the entire MMS tetrahedron to be within the EDR most of the time. These observations are consistent with recent high-resolution and low-noise kinetic simulations.
Xenylla maritima TULLBERG 1869
Creators: name: H. - J
name: Burkhardt, U.
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Collembola
Poduromorpha
Hypogastruridae
Xenylla
Xenylla maritima

description: Xenylla maritima TULLBERG 1869
M a t e r i a l: 36 Expl. Molchos, 14 Expl. Vai Palm Beach, 2 Expl. Anatoli, 1 Expl. Selakano Plateau, 26 Expl. Kritsa Katharo Plateau 1/3.
 X. maritima ist sehr häufig anzutreffen in trockenen Habitaten, aber auch in Moosen und Flechten von Felsen (THIBAUD et al. 2004).
description: Published as part of H. - J & Burkhardt, U., 2012, Interessante Collembolennachweise aus Ostkreta (Hexapoda, Collembola), pp. 1669-1676 in Linzer biologische Beiträge 44 (2) on page 1672, DOI: 10.5281/zenodo.10106991