cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Feature Selection for Transient Stability Assessment Based on Improved Maximal Relevance and Minimal Redundancy Criterion
Creators: name: Li, Yang
name: Gu, Xueping
Publisher: name: arXiv
Year: 2019
Subjects: subject: Signal Processing (eess.SP)
subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: A new feature selection method based on an improved maximal relevance and minimal redundancy (mRMR) criterion was proposed for power system transient stability assessment. First, the standard mRMR was improved by introducing a weight coefficient in the evaluation criteria to refine the measurement of the features correlation and redundancy. Then, the possible real-time information provided by phasor measurement unit (PMU) considered, a group of system-level classification features were extracted from the power system operation parameters to build the original feature set, and the improved mRMR was employed to evaluate the classification capability of the original features for feature selection. A group of nested candidate feature subsets were obtained by using the incremental search technique, and each candidate feature subset was tested by a support vector machine classifier to find the optimal feature subset with the highest classification accuracy. The effectiveness of the proposed method was validated by the simulation results on the New England 39-bus system and IEEE 50-generator test system.
Conductance of Mesoscopic Systems with Magnetic Impurities
Creators: name: Vavilov, M. G.
name: Glazman, L. I.
Publisher: name: arXiv
Year: 2002
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We investigate the combined effects of magnetic impurities and applied magnetic field on the interference contribution to the conductance of disordered metals. We show that in a metal with weak spin-orbit interaction, the polarization of impurity spins reduces the rate of electron phase relaxation, thus enhancing the weak localization correction to conductivity. Magnetic field also suppresses thermal fluctuations of magnetic impurities, leading to a recovery of the conductance fluctuations. This recovery occurs regardless the strength of the spin-orbit interaction. We calculate the magnitudes of the weak localization correction and of the mesoscopic conductance fluctuations at an arbitrary level of the spin polarization induced by a magnetic field. Our analytical results for the ``$h/e$'' Aharonov-Bohm conductance oscillations in metal rings can be used to extract spin and gyromagnetic factor of magnetic impurities from existing experimental data.
description: 18 pages, 8 figures
Signal recycled laser-interferometer gravitational-wave detectors as optical springs
Creators: name: Buonanno, Alessandra
name: Chen, Yanbei
Publisher: name: arXiv
Year: 2001
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Using the force-susceptibility formalism of linear quantum measurements, we study the dynamics of signal recycled interferometers, such as LIGO-II. We show that, although the antisymmetric mode of motion of the four arm-cavity mirrors is originally described by a free mass, when the signal-recycling mirror is added to the interferometer, the radiation-pressure force not only disturbs the motion of that ``free mass'' randomly due to quantum fluctuations, but also and more fundamentally, makes it respond to forces as though it were connected to a spring with a specific optical-mechanical rigidity. This oscillatory response gives rise to a much richer dynamics than previously known for SR interferometers, which enhances the possibilities for reshaping the noise curves and, if thermal noise can be pushed low enough, enables the standard quantum limit to be beaten. We also show the possibility of using servo systems to suppress the instability associated with the optical-mechanical interaction without compromising the sensitivity of the interferometer.
description: 42 pages, 13 figures
On Observability and Monitoring of Distributed Systems: An Industry Interview Study
Creators: name: Niedermaier, Sina
name: Koetter, Falko
name: Freymann, Andreas
name: Wagner, Stefan
Publisher: name: arXiv
Year: 2019
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: Business success of companies heavily depends on the availability and performance of their client applications. Due to modern development paradigms such as DevOps and microservice architectural styles, applications are decoupled into services with complex interactions and dependencies. Although these paradigms enable individual development cycles with reduced delivery times, they cause several challenges to manage the services in distributed systems. One major challenge is to observe and monitor such distributed systems. This paper provides a qualitative study to understand the challenges and good practices in the field of observability and monitoring of distributed systems. In 28 semi-structured interviews with software professionals we discovered increasing complexity and dynamics in that field. Especially observability becomes an essential prerequisite to ensure stable services and further development of client applications. However, the participants mentioned a discrepancy in the awareness regarding the importance of the topic, both from the management as well as from the developer perspective. Besides technical challenges, we identified a strong need for an organizational concept including strategy, roles and responsibilities. Our results support practitioners in developing and implementing systematic observability and monitoring for distributed systems.
Self-similar breakup of polymeric threads as described by the Oldroyd-B model
Creators: name: Eggers, J.
name: Herrada, M. A.
name: Snoeijer, J. H.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: When a drop of fluid containing long, flexible polymers breaks up, it forms threads of almost constant thickness, whose size decreases exponentially in time. Using an Oldroyd-B fluid as a model, we show that the thread profile, rescaled by the thread thickness, converges to a similarity solution. Using the correspondence between viscoelastic fluids and non-linear elasticity, we derive similarity equations for the full three-dimensional axisymmetric flow field in the limit that the viscosity of the solvent fluid can be neglected. A conservation law balancing pressure and elastic energy permits to calculate the thread thickness exactly. The explicit form of the velocity and stress fields can be deduced from a solution of the similarity equations. Results are validated by detailed comparison with numerical simulations.
Bactrocera (Bactrocera) tinomiscii Drew
Creators: name: Drew, R. A. I.
name: Ma, Jing
name: Smith, S.
name: Hughes, J. M.
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Tephritidae
Bactrocera
Bactrocera tinomiscii

description: Bactrocera (Bactrocera) tinomiscii Drew
 Bactrocera (Bactrocera) tinomiscii: Drew, 1989: 43–45.
  Diagnosis. –  A medium sized species (wing length 6.3 mm); face with a pair of small oval spots; scutum black; postpronotal lobe and notopleuron yellow; each lateral postsutural vitta of medium width and narrowing slightly posteriorly to end at ia. seta; mesopleural stripe reaching midway between anterior margin of notopleuron and postpronotal lobe dorsally; wings with cells bc and c colourless, microtrichia in outer corner of cell c only, fuscous costal band just overlapping R 2+3, broad fuscous cubital streak; legs fulvous except basal ½ of hind tibiae fuscous; abdominal terga mostly orange-brown with fuscous anterolateral corners on tergum III and a narrow dark fuscous to black medial longitudinal band over terga III–V, shining spots orange-brown.
  Attractant. –  Cue lure.
  Hosts. – Tinomisciumphytocrenoides  (familyMenispermaceae) and Chlaenandra ovata (family Menispermaceae).
  Distribution. –  Type locality: Papua New Guinea (Rouna Power Station, Central District).
Previously recorded: Papua New Guinea (Central Province, Morobe Province, Eastern Highlands District, Sepik District).
description: Published as part of Drew, R. A. I., Ma, Jing, Smith, S. & Hughes, J. M., 2011, The Taxonomy And Phylogenetic Relationships Of Species In The Bactrocera Musae Complex Of Fruit Flies (Diptera: Tephritidae: Dacinae) In Papua New Guinea, pp. 145-162 in Raffles Bulletin of Zoology 59 (2) on page 156, DOI: 10.5281/zenodo.10107060
Supersolid phases of Rydberg-excited bosons on a triangular lattice
Creators: name: Panas, Jaromir
name: Barbier, Mathieu
name: Geißler, Andreas
name: Hofstetter, Walter
Publisher: name: arXiv
Year: 2019
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: Recent experiments with ultracold Rydberg-excited atoms have shown that long-range interactions can give rise to spatially ordered structures. Observation of crystalline phases in a system with Rydberg atoms loaded into an optical lattice seems also within reach. Here we investigate a bosonic model on a triangular lattice suitable for description of such experiments. Numerical simulations based on bosonic dynamical mean-field theory reveal a rich phase diagram with different supersolid phases. Comparison with the results obtained for a square lattice geometry shows qualitatively similar results in a wide range of parameters, however, on a triangular lattice we do not observe the checkerboard supersolid. Moreover, unlike on a square lattice we did not find a phase transition from uniform superfluid to supersolid induced by increase of the hopping amplitude on a triangular lattice. Based on our results we propose an intuitive interpretation of the nature of different supersolid phases. We also propose parameters for the experimental realization.
description: 13 pages, 8 figures
Correlated electron states and transport in triangular arrays
Creators: name: Novikov, D. S.
name: Kozinsky, B.
name: Levitov, L. S.
Publisher: name: arXiv
Year: 2001
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study correlated electron states in frustrated geometry of a triangular lattice. The interplay of long range interactions and finite residual entropy of a classical system gives rise to unusual effects in equilibrium ordering as well as in transport. A novel correlated fluid phase is identified in a wide range of densities and temperatures above freezing into commensurate solid phases. The charge dynamics in the correlated phase is described in terms of a height field, its fluctuations, and topological defects. We demonstrate that the height field fluctuations give rise to a ``free'' charge flow and finite dc conductivity. We show that freezing into the solid phase, controlled by the long range interactions, manifests itself in singularities of transport properties.
description: 19 pages, 10 figures
title: Investigating Gesture-based Commands for First-Person Shooter Games in Virtual Reality
Creators: name: Schmitt, Johann
name: Wienrich, Carolin
name: Latoschik, Marc Erich
name: Lugrin, Jean-Luc
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2019
Subjects: subject: Virtual Reality
subject: Gestures
subject: Games

description: In this paper, we present the first results of a user-defined approach for designing gesture-driven commands for a first-person shooter (FPS) game in Virtual Reality (VR). We identified and categorized a set of common gestures for two in-game actions as well as two system control operations. We believe our preliminary results will interest VR game designers and researchers
Turbulence and Rotation in Solar-Type Stars
Creators: name: A, Sheminova V.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Stellar spectra with a high resolution of 115000 obtained with the HARPS spectrograph provide an opportunity to examine turbulence velocities and their depth distributions in the photosphere of stars. Fourier analysis was performed for 17 iron lines in the spectra of 13 stars with an effective temperature of 4900--6200 K and a logarithm of surface gravity of 3.9--5.0 as well as in the spectrum of the Sun as a star. Models of stellar atmospheres were taken from the MARCS database. The standard concept of isotropic Gaussian microturbulence was assumed in this study. A satisfactory fit between the synthesized profiles of spectral lines and observational data verified the reliability of the Fourier method. The most likely estimates of turbulence velocities, the rotation velocity, and the iron abundance and their photospheric depth distribution profiles were obtained as a result. Microturbulence does not vary to any significant degree with depth, while macroturbulence has a marked depth dependence. The macroturbulence velocity increases with depth in the stellar atmosphere. The higher the effective temperature of a star and the stronger the surface gravity, the steeper the expected macroturbulence gradient. The mean macroturbulence velocity increases for stars with higher temperatures, weaker gravity, and faster rotation. The mean macro- and microturbulence velocities are correlated with each other and with the rotation velocity in the examined stars. The ratio between the macroturbulence velocity and the rotation velocity in solar-type stars varies from 1 (the hottest stars) to 1.7 (the coolest stars). The age dependence of the rotation velocity is more pronounced than that of the velocity of macroturbulent motions.
description: 15 pages, 7 figures, 3 tables, published in Kinematics and Physics of Celestial Bodies, 2019, Vol. 35, no. 3, P. 129-142 (in English), Kinematika i Fizika Nebesnykh Tel, 2019, Vol. 35, no. 3, P. 44-66 (in Russian)
title: Towards a Graphical User Interface for Quantitative Analysis in Digital Musicology
Creators: name: Ortloff, Anna-Marie
name: Windl, Maximiliane
name: Güntner, Lydia
name: Schmidt, Thomas
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2019
Subjects: subject: Digital Musicology
subject: Statistical Musicology
subject: User Centered Design
subject: Visualization
subject: Distant Hearing

description: We introduce the first prototype of a web application for digital musicology: BeyondTheNotes. BeyondTheNotes is a tool to support the in-depth analysis of individual pieces of music as well as the large scale analysis and comparison of summative features of multiple pieces of music. In contrast to existing tools, BeyondTheNotes is ready to use without installation, enables the upload and analysis of own material and offers different visualizations of musical metrics like the chords, pitches, durations and key. We design the tool according to the User Centered Design Approach to improve the usability and address the specific needs of musicologists. We describe the results of the requirement analysis and discuss future steps.
title: Akzeptanzrisiken in der Mensch-Roboter-Interaktion - Nutzerzentrierte Erhebung von ethischen, rechtlichen und sozialen Implikationen (ELSI) am Beispiel einer Roboterplattform für Kinder mit eingeschränkten sozio-emotionalen Fähigkeiten
Creators: name: Simon, Martina
name: Strehler, Martin
name: Kirst, Simone
name: Schmitt-Rüth, Stephanie
name: Lang, Nadine
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2019
Subjects: subject: Nutzerakzeptanz
subject: Mensch-Roboter-Interaktion
subject: Akzeptanz-Risiko-Workshop
subject: Autismus
subject: Emotionen

description: Der Einbezug ethischer, sozialer und rechtlicher Aspekte (ELSI) stellt inzwischen eine feste Größe für die Entwicklung von Mensch-Roboter-Interaktionssystemen dar, da sie einen zentralen Beitrag zur Akzeptanz solcher Systeme durch die Nutzer und damit eine erfolgreiche Implementierung leisten. Der vorliegende Beitrag zeigt am Beispiel des Forschungsprojekts »ERIK«, wie ethische, soziale und rechtliche Aspekte und Akzeptanzrisiken im Rahmen von Akzeptanz-Risiko-Workshops nutzerzentriert erhoben wurden und wie deren Bewertung im Rahmen eines Online-Fragebogens erfolgte. Durch die Vorgehensweise konnten ethische, soziale und rechtliche Aspekte mit hohem, mittlerem und niedrigem Akzeptanzrisiko seitens der potentiellen Nutzer identifiziert werden, die nun in der weiteren Entwicklung des Forschungsprojekts berücksichtigt und in den Evaluationsprozess einbezogen werden können.
Search for a Standard Explanation of the Pioneer Anomaly
Creators: name: Anderson, John D.
name: Lau, Eunice L.
name: Turyshev, Slava G.
name: Laing, Philip A.
name: Nieto, Michael Martin
Publisher: name: arXiv
Year: 2001
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The data from Pioneer 10 and 11 shows an anomalous, constant, Doppler frequency drift that can be interpreted as an acceleration directed towards the Sun of a_P = (8.74 \pm 1.33) x 10^{-8} cm/s^2. Although one can consider a new physical origin for the anomaly, one first must investigate the contributions of the prime candidates, which are systematics generated on board. Here we expand upon previous analyses of thermal systematics. We demonstrate that thermal models put forth so far are not supported by the analyzed data. Possible ways to further investigate the nature of the anomaly are proposed.
description: Changes made for publication
Written Communication Apprehension of Accounting Students
Creators: name: Ferreira Da Silva, Amélia
name: Silva, Rui
name: Carreira, Francisco
Publisher: name: Academia
Year: 2024
Subjects: Written Communication Apprehension; Accounting Students; Skills

description: The paper presents a demographic distribution of the subjective manifestations of anxiety in written communication of Portuguese higher accounting students. The students completed a questionnaire provided online, and data collection ended up with 813 valid participations. Data were processed using IBM, SPSS-27, applying descriptive statistics. The findings showed that students who feel more apprehension in writing are those from the 2nd curricular year. In contrast, students in the 3rd year of the course exhibit the highest levels of Written Communication Apprehension and all dimensions (Positivity towards writing, Negativity towards writing, Evaluation apprehension, Self-efficacy and writing). The results are also consistent across all four dimensions by gender type, with both males and females having less difficulty in the positivity towards writing construct. The group of students aged 40 years or less has a total Written Communication Apprehension higher than the other age groups, denoting a greater difficulty in writing. The paper contributes to the body of literature since it is the first to evaluate Portuguese accounting students' written communication apprehension level. Moreover, it fosters the awareness of higher institutions' education about their effective contribution to fulfilling students' and employers' aspirations.
description: Academia, Αρ. 34 (2024)
Ueber die Zu- und Abnahme des Gewichtes der Seidenraupe in ihren verschiedenen Ständen
Creators: name: Linstow, O. V.
Publisher: name: Acta Albertina Ratisbonensia
Year: 2017

description: ...
description: Acta Albertina Ratisbonensia, Bd. 23 (1869): Correspondenzblatt
Megalopinus leileri PUTHZ 1990
Creators: name: Puthz, V.
Publisher: name: Zenodo
Year: 2013
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Megalopinus
Megalopinus leileri

description: Megalopinus leileri PUTHZ 1990 (Abb. 1)
 Megalopinus leileri PUTHZ 1990: 267; PUTHZ 2012: 1390.
 M a t e r i a l: 13, 5♀♀: LAOS: Louangphrabang prov., Thong Khan, 750m, 19 ° 35’N, 101 ° 58’E, 11.-21.V.2001, V. Kubán: Naturhistorisches Museum Basel und coll. Puthz.
 B e m e r k u n g e n Diese Art ist neu für Laos. Den Aedoeagus des bisher unbekannten Männchens zeigt Abb. 1. Seine Gestalt mit den auffallenden Innenhaken macht deutlich, dass diese Art nahe mit M. sumatranus PUTHZ verwandt ist (vgl. Abb. 72, PUTHZ 2012).
description: Published as part of Puthz, V., 2013, Weitere Megalopinus-Arten aus der Orientalis (Coleoptera, Staphylinidae) (27. Beitrag zur Kenntnis der Megalopsidiinen), pp. 845-849 in Linzer biologische Beiträge 45 (1) on page 846, DOI: 10.5281/zenodo.5299505
A proposal to determine the spectrum of pairing-glue in high-temperature superconductors
Creators: name: Vekhter, I.
name: Varma, C. M.
Publisher: name: arXiv
Year: 2002
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We propose a method for an analysis of the angle-resolved photoemission data in two-dimensional anisotropic superconductors which directly yields the spectral function of the bosons mediating Cooper pairing. The method includes a self-consistency check for the validity of the approximations made in the analysis. We explicitly describe the experimental data needed for implementing the proposed procedure.
description: 5 pages, small stylistic changes to accommodate PRL length, final version
Metanoeus bakeri Kleine 1926
Creators: name: Weiszenstein, Martin
name: Bocak, Ladislav
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Lycidae
Metanoeus
Metanoeus bakeri

description: Metanoeus bakeri Kleine, 1926
(Figs. 13–14)
 Metanoeus bakeri Kleine, 1926: 99.
  Material examined. –  Holotype. Male (MZIW), Kolambugan, Mindanao, Baker. ex. coll. R. Kleine, Mus. Zool. Polonicum Warszawa 12/45, Holotypus nr. 654.
  Others. –  Male (KMTC), Philippines, Luzon, Bicol National Park, Nr. Daet, coll. T. Ito, 10 Aug.1988.
 Differential diagnosis. – M. bakeri and M. luzonensis are defined by the short, very robust phallus (Figs. 13–16). That of M. bakeri has shorter apical processes than M. luzonensis. The detailed study of male genitalia is necessary for a reliable differentiation of these species.
  Description. –  Body medium-sized. Head, pro- and mesothorax light brown, metathorax brown, pronotum and elytra bright yellow; antennae brown; trochanters and bases of femora light brown, gradually changing to dark brown or black apically. Head small, hypognathous, including eyes wider or of similar width as frontal margin of pronotum. Eyes hemispherically prominent, eye diameter 1.04 times frontal interocular distance. Antennae flabellate, lamellae of medial antennomeres about 2.7 times longer than body of antennomere. Head and appendages with dense, short, recumbent pubescence. Pronotum flat, 1.26 times wider than long at midline, widest at lateral third; with dense pubescence. Elytra almost parallel-sided, slightly widened posteriorly, widest at apical third; 3.68 times longer than width at humeri; covered with sparse pubescence. Male genitalia short, robust, phallus with apical processes (Figs. 13–14).
  Measurements. –  BL 6.75 mm, PL 1.06 mm, PW 1.34 mm, HW 1.52 mm, Edist 0.62 mm, Ediam 0.64 mm.
  Distribution. –  Philippines: Luzon.
description: Published as part of Weiszenstein, Martin & Bocak, Ladislav, 2011, A Review Of The Genus Metanoeus From The Philippines (Coleoptera: Lycidae), pp. 163-170 in Raffles Bulletin of Zoology 59 (2) on page 166, DOI: 10.5281/zenodo.10107115
On the interpretation of Michelson-Morley experiments
Creators: name: Lämmerzahl, Claus
name: Haugan, Mark P.
Publisher: name: arXiv
Year: 2001
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Recent proposals for improved optical tests of Special Relativity have renewed interest in the interpretation of such tests. In this paper we discuss the interpretation of modern realizations of the Michelson-Morley experiment in the context of a new model of electrodynamics featuring a vector-valued photon mass. This model is gauge invariant, unlike massive-photon theories based on the Proca equation, and it predicts anisotropy of both the speed of light and the electric field of a point charge. The latter leads to an orientation dependence of the length of solid bodies which must be accounted for when interpreting the results of a Michelson-Morley experiment. Using a simple model of ionic solids we show that, in principle, the effect of orientation dependent length can conspire to cancel the effect of an anisotropic speed of light in a Michelson-Morley experiment, thus, complicating the interpretation of the results.
description: To appear in Phys.Lett.A
Supplementary Material: supporting material, methods, figures, and tables from Rapid predictive simulations with complex musculoskeletal models suggest that diverse healthy and pathological human gaits can emerge from similar control strategies
Creators: name: Falisse, Antoine
name: Serrancolí, Gil
name: Dembia, Christopher L.
name: Gillis, Joris
name: Jonkers, Ilse
name: Groote, Friedl De
Publisher: name: The Royal Society
Year: 2019
Subjects: subject: Biophysics
subject: 110601 Biomechanics
subject: FOS: Health sciences
subject: Computational Biology

description: This supporting document contains more details about the experimental data, the smooth approximations, and the optimal control formulations. In addition, this document contains supporting figures and tables referred to in the main text.
The Influence of Physical Activity on Student Satisfaction
Creators: name: Lončar, Martina
name: Pongračić, Luka
name: Tonković, Aleksandra
Publisher: name: Academia
Year: 2024
Subjects: Health, physical activity, satisfaction, students

description: Regular physical activity can raise personal energy levels and improve mood, which is important for achieving overall health, physical but also mental health. For overall health, it is essential to establish a link between individual aspects of mental health and physical activity. The paper includes the basic theses about the importance of physical activities (sport, exercises, walking, etc.) for students’ health, i.e. the influence of exercising on the physical and mental health of each individual. The main research goal was to examine the connection between physical activity and the subjective feeling of satisfaction. As part of the empirical research, an anonymous survey was conducted among 226 students from Croatia belonging to different study groups. The research indicated the correlations between the examined variables and showed that engaging in physical activities in different ways is extremely important for human health. Participants engaged in activities of high and moderate intensity show the highest positive correlation with satisfaction.
description: Academia, Αρ. 34 (2024)
title: Using MQTT for Platform Independent Remote Mixed Reality Collaboration
Creators: name: Waldow, Kristoffer
name: Fuhrmann, Arnulph
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2019
Subjects: subject: MQTT Protocol
subject: Remote Collaboration
subject: Mixed Reality

description: In this paper, we present a Mixed Reality telepresence system that allows the connection of multiple AR or VR devices to create a shared virtual environment by using the simple MQTT networking protocol. It follows a subscribe-publish pattern for reliable and easy platform independent integration. Therefore, it is possible to realize different clients that handle communication and allow remote collaboration. To allow embodied natural human interaction, the system maps the human interaction channels, gestures, gaze and speech, to an abstract stylized avatar by using an upper body inverse kinematic approach. This setup allows spatially separated persons to interact with each other via an avatar-mediated communication.
title: Brain 2 Communicate: EEG-based Affect Recognition to Augment Virtual Social Interactions
Creators: name: Roth, Daniel
name: Westermeier, Franziska
name: Brübach, Larissa
name: Feigl, Tobias
name: Schell, Christian
name: Latoschik, Marc Erich
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2019
Subjects: subject: brain-computer interfaces
subject: augmented social interaction
subject: avatars
subject: shared virtual environments

description: The perception and expression of emotion is a fundamental part of social interaction. This project aims to utilize neuronal signals to augment avatar-mediated communications. We recognize emotions with a brain-computer-interface (BCI) and supervised machine learning. Using an avatar-based communication interface that supports head tracking, gaze tracking, and speech to animation, we leverage the BCI-based affect detection to visualize emotional states.
Entrepreneurial Readiness Assessment of Students Based on Creativity, Self-Efficacy, and Motivation
Creators: name: Muspawi, Mohamad
name: Yunita, Delma
Publisher: name: Academia
Year: 2024
Subjects: Creativity; entrepreneurial readiness; entrepreneurship; motivation; self-efficacy

description: Entrepreneurship is strategically supporting the national priority program for prosperity, as entrepreneurship growth corresponds to job vacancies. Entrepreneurship education is crucial for producing many entrepreneurs. However, many fresh graduate students who have already received an entrepreneurship education prefer to work in private or government companies rather than becoming an entrepreneur. Entrepreneurship education alone is not enough to support entrepreneurial readiness. Several intrinsic factors, especially student motivation, are required to create a generation of entrepreneurs. This study aims to investigate the effect of intrinsic factors, such as the impact of creativity, self-efficacy, and motivation, on students' entrepreneurial readiness. This study employed a quantitative approach based on survey techniques, with 236 students serving as the correspondents. The collected data were statistically analyzed using a linear regression equation and SPSS 21.0 software. The findings revealed that creativity, self-efficacy, and motivation impacted students' entrepreneurial readiness.
description: Academia, Αρ. 34 (2024)
Endogenous versus Exogenous Crashes in Financial Markets
Creators: name: Johansen, A.
name: Sornette, D.
Publisher: name: arXiv
Year: 2002
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Statistical Finance (q-fin.ST)
subject: FOS: Physical sciences
subject: FOS: Economics and business

description: We perform an extended analysis of the distribution of drawdowns in the two leading exchange markets (US dollar against the Deutsmark and against the Yen), in the major world stock markets, in the U.S. and Japanese bond market and in the gold market, by introducing the concept of ``coarse-grained drawdowns,'' which allows for a certain degree of fuzziness in the definition of cumulative losses and improves on the statistics of our previous results on the existence of ``outliers'' or ``kings.'' Then, for each identified outlier, we check whether log-periodic power law signatures (LPPS) are present and take the existence of LPPS as the qualifying signature for an endogenous crash: this is because a drawdown outlier is seen as the end of a speculative unsustainable accelerating bubble generated endogenously. In the absence of LPPS, we are able to identify what seems to have been the relevant historical event, i.e., a new piece of information of such magnitude and impact that it is seems reasonable to attribute the crash to it, in agreement with the standard view of the efficient market hypothesis. Such drawdown outliers are classified as having an exogenous origin. Globally over all the markets analyzed, we identify 49 outliers, of which 25 are classified as endogenous, 22 as exogeneous and 2 as associated with the Japanese anti-bubble. Restricting to the world market indices, we find 31 outliers, of which 19 are endogenous, 10 are exogenous and 2 are associated with the Japanese anti-bubble. The combination of the two proposed detection techniques, one for drawdown outliers and the second for LPPS, provides a novel and systematic taxonomy of crashes further subtantiating the importance of LPPS.
description: Latex, 34 pages with 11 tables and 47 figures
Procedure for measuring the motivational and volitional component of professional training for combat flights of future tactical aviation pilots
Creators: name: Nevzorov, Roman
Publisher: name: Academia
Year: 2024
Subjects: Τactical aviation; motivational component, volitional component, professional training of pilots, pedagogical experiment

description: The article aims to substantiate the procedure for measuring the motivational and volitional component of professional training for future tactical aviation pilots engaged in combat flights. The study employed a methodology to determine the motivational complex of personality as an indicator of satisfaction with the chosen military pilot profession. This methodology was based on previous research that highlights the correlation between professional satisfaction and the type of motivational complex, including intrinsic, extrinsic positive, and extrinsic negative elements. The diagnostic method utilized in this study was developed by K. Zamfir and modified by A. Rean. Furthermore, the research assessed volitional qualities by examining the content and expression of decision-making in challenging situations. The diagnostic method employed in this assessment was developed by N. Stambulova. The measurement of the motivational-volitional component of professional readiness among military pilot cadets revealed notable differences between the experimental group and control group in terms of their motivational and volitional indicators. The obtained results underline the significance of incorporating these findings to enhance the educational process for military pilot cadets. Implementing a pedagogical system based on the effectiveness demonstrated in measuring the motivational component of professional training will be crucial in this regard.
description: Academia, Αρ. 34 (2024)
title: Über Erfahrungen in der Anwendung computerbasierter Streichinstrumente: das Duo Expanded Strings
Creators: name: Pöpel, Cornelius
name: Marx, Günter
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2019
Subjects: subject: Computerbasierte Streichinstrumente
subject: Streicherinteraktion
subject: neue digitale Live-Musik
subject: Transfer digitale Musiktechnologie

description: Neben der Entwicklung computerbasierter Musikinterfaces und Musikinstrumente stellt deren Erprobung und Nutzung im realen Kontext des Musik- und Konzertlebens eine Herausforderung dar. Konferenzen wie die Mensch & Computer stellen üblicher Weise die Dinge stärker aus der Sicht der Technikentwickler denn aus der Anwendersicht dar. In diesem Paper soll am Beispiel von zwei Streichern explizit aus der Musikersicht, deren Wertevorstellungen und Prioritäten dargestellt werden, wie mit computerbasierten Streichinstrumenten gearbeitet wurde, welche konkreten Herausforderungen anlagen und wie in diesem Fall damit umgegangen wurde. Es werden die technischen Setups, die eingesetzte Software und die künstlerischen Beweggründe für die Auswahl der Komponenten sowie deren Programmierung dargestellt. Weiterhin wird anhand eines Konzerts die Einbindung von Musik für computerbasierte Streichinstrumente dargelegt. Es wird eine Zukunftsidee vorgestellt, welche es interessierten Streicher*innen erleichtern soll, Zugang zu neuen computerbasierten Streichinstrumenten zu bekommen.
Metanoeus cognatus Kleine 1926
Creators: name: Weiszenstein, Martin
name: Bocak, Ladislav
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Lycidae
Metanoeus
Metanoeus cognatus

description: Metanoeus cognatus Kleine, 1926
 Metanoeus cognatus Kleine, 1926: 100.
  Material examined. –  Holotype. Male (MZIW), Island Sibuyan, Baker, Typus. ex. coll. R. Kleine, Mus. Zool. Polonicum Warszawa 12/45, Ins. Zool PAN Warszawa Holotypus nr. 664.
  Differential diagnosis. – M. cognatus  is the only species in the Philippines with dark coloured apical part of elytra. Additionally, it differs from other Philippine species in the very slender apical part of the phallus.
  Description. –  Body medium-sized. Head, palpi, thorax, trochanters and bases of femora light brown; pronotum and elytra except apical eighth bright yellow; antennae, apices of elytra, apical parts of femora, tibiae and tarsi brown to black. Head small, hypognathous, including eyes slightly wider than frontal margin of pronotum. Eyes large, hemispherically prominent, eye diameter 1.15 times frontal interocular distance. Antennae flabellate, lamellae of median antennomeres 2.2 times longer than body of corresponding antennomere body. Head and antennae densely pubescent. Pronotum flat, 1.25 times wider than long at midline, lateral margins parallel-sided; anterior angles obtuse, posterior angles almost rectangular, pronotum covered with dense pubescence. Posterior margin of pronotum slightly bisinuate. Elytra almost parallel-sided, slightly widened posteriorly, widest at apical third; 3.6 times longer than width at humeri. Phallus robust at base, very slender apically, internal sac with long, slender, sclerotized rods.
  Measurements. –  BL 8.8 mm, PL 1.4 mm, PW 1.7 mm, HW 2.05 mm, Edist 0.65 mm, Ediam 0.75 mm.
  Distribution. –  Philippines: Island Sibuyan.
description: Published as part of Weiszenstein, Martin & Bocak, Ladislav, 2011, A Review Of The Genus Metanoeus From The Philippines (Coleoptera: Lycidae), pp. 163-170 in Raffles Bulletin of Zoology 59 (2) on page 166, DOI: 10.5281/zenodo.10107115
Megalopinus hirashimai NAOMI 1986
Creators: name: Puthz, V.
Publisher: name: Zenodo
Year: 2013
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Megalopinus
Megalopinus hirashimai

description: Megalopinus hirashimai NAOMI 1986
 Megalopinus hirashimai NAOMI 1986: 348; PUTHZ 2012: 1389.
 M a t e r i a l:13, 2♀♀: LAOS: Phongsaly propv., Ban Sano Mai, ca. 1150m, 21 ° 21’N, 102 ° 03’E, 19.-26.V.2004, V. Kubán: Naturhistorisches Museum Basel und coll. Puthz.
B e m e r k u n g Neu für Laos! Mit diesen Funden wird die Lücke zwischen China (Yunnan) und Thailand geschlossen.
description: Published as part of Puthz, V., 2013, Weitere Megalopinus-Arten aus der Orientalis (Coleoptera, Staphylinidae) (27. Beitrag zur Kenntnis der Megalopsidiinen), pp. 845-849 in Linzer biologische Beiträge 45 (1) on page 846, DOI: 10.5281/zenodo.5299505
A far-UV survey of three hot, metal-polluted white dwarf stars: WD0455-282, WD0621-376, and WD2211-495
Creators: name: Preval, S. P.
name: Barstow, M. A.
name: Bainbridge, M.
name: Reindl, N.
name: Ayres, T.
name: Holberg, J. B.
name: Barrow, J. D.
name: Lee, C. C.
name: Webb, J. K.
name: Hu, J.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Using newly obtained high-resolution data ($R\sim{1\times{10}^{5}}$) from the \textit{Hubble Space Telescope}, and archival UV data from the \textit{Far Ultraviolet Spectroscopic Explorer} we have conducted a detailed UV survey of the three hot, metal-polluted white dwarfs WD0455-282, WD0621-376, and WD2211-495. Using bespoke model atmospheres we measured $T_{\mathrm{eff}}$, log $g$, and photospheric abundances for these stars. In conjunction with data from Gaia we measured masses, radii, and gravitational redshift velocities for our sample of objects. We compared the measured photospheric abundances with those predicted by radiative levitation theory, and found that the observed Si abundances in all three white dwarfs, and the observed Fe abundances in WD0621-376 and WD2211-495, were larger than those predicted by an order of magnitude. These findings imply not only an external origin for the metals, but also ongoing accretion, as the metals not supported by radiative levitation would sink on extremely short timescales. We measured the radial velocities of several absorption features along the line of sight to the three objects in our sample, allowing us to determine the velocities of the photospheric and interstellar components along the line of sight for each star. Interestingly, we made detections of circumstellar absorption along the line of sight to WD0455-282 with three velocity components. To our knowledge, this is the first such detection of multi-component circumstellar absorption along the line of sight to a white dwarf.
description: 19 pages, 23 figures, 8 tables. Accepted for publication in the Monthly Notices of the Royal Astronomical Society
title: Evaluierung der sozialen Akzeptanz verschiedener Interaktionsarten für Augmented-Reality-Datenbrillen
Creators: name: Mack, Nils Adrian
name: Schmidt, Ludger
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2019
Subjects: subject: Augmented Reality
subject: Interaktionsarten
subject: Datenbrillen
subject: Soziale Akzeptanz

description: Die soziale Akzeptanz ist neben der praktischen Akzeptanz ein wichtiger Bestandteil der Akzeptanz eines Systems durch die Nutzer. Es ist möglich, dass trotz hoher praktischer Akzeptanz ein System nicht genutzt wird, da dieses sozial nicht akzeptabel ist. Für Augmented-Reality-Datenbrillen (AR-Datenbrillen) wurden schon verschiedene Faktoren determiniert, welche die soziale Akzeptanz beeinflussen können, um zu vermeiden, dass diese von den Nutzern abgelehnt werden. Ein wichtiger Faktor, welcher die soziale Akzeptanz einer Datenbrille beeinflussen kann, ist die Interaktionsart. Es ist anzunehmen, dass die Verwendung unterschiedlicher Interaktionsarten in dem gleichen sozialen Kontext mit dem gleichen Gesamtsystem nicht in der gleichen sozialen Akzeptanz resultiert. Nachfolgend wird eine Studie mit 10 Probanden und 6 aktuell auf AR-Datenbrillen verwendeten Interaktionsarten durchgeführt, um deren soziale Akzeptanz in verschiedenen Orts- und Zuschauerkontexten vergleichend zu evaluieren. Die Studie zeigt, dass die Interaktionsarten, insbesondere diverse Arten der Sprachinteraktion, mit steigender Distanz der sozialen Beziehung zu dem Zuschauer in der Bewertung degradieren und, dass der Ort des voraussichtlichen Einsatzes der Interaktionsart berücksichtigt werden muss.
Relaxation versus collision times in the cosmological radiative era
Creators: name: Pavon, Diego
name: Sussman, Roberto A.
Publisher: name: arXiv
Year: 2001
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: We consider the Lema\^ıtre-Tolman-Bondi metric with an inhomogeneous viscous fluid source satisfying the equation of state of an interactive mixture of radiation and matter. Assuming conditions prior to the decoupling era, we apply Extended Irreversible Thermodynamcs (EIT) to this mixture. Using the full transport equation of EIT we show that the relaxation time of shear viscosity can be several orders of magnitude larger than the Thomson collision time between photons and electrons. A comparison with the ``truncated'' transport equation for these models reveals that the latter cannot describe properly the decoupling of matter and radiation
description: To appear in Classical and Quantum Gravity. Latex with revtex macros. Includes six figures
Fibered rotation vector and hypoellipticity for quasiperiodic cocycles in compact Lie groups
Creators: name: Karaliolios, Nikolaos
Publisher: name: arXiv
Year: 2019
Subjects: subject: Dynamical Systems (math.DS)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 37C55, 35H10

description: Using weak solutions to the conjugation equation, we define a fibered rotation vector for almost reducible quasi-periodic cocycles in $\mathbb{T}^{d} \times G$, $G$ a compact Lie group, over a Diophantine rotation. We then prove that if this rotation vector is Diophantine with respect to the rotation in $\mathbb{T}^{d}$, the cocycle is smoothly reducible, thus establishing a hypoellipticity property in the spirit of the Greenfield-Wallach conjecture in PDEs.
description: 14 pages
Variational Approach to Hard Sphere Segregation Under Gravity
Creators: name: Both, Joseph A.
name: Hong, Daniel C.
Publisher: name: arXiv
Year: 2001
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: It is demonstrated that the minimization of the free energy functional for hard spheres and hard disks yields the result that excited granular materials under gravity segregate not only in the widely known "Brazil nut" fashion, i.e. with the larger particles rising to the top, but also in reverse "Brazil nut" fashion. Specifically, the local density approximation is used to investigate the crossover between the two types of segregation occurring in the liquid state, and the results are found to agree qualitatively with previously published results of simulation and of a simple model based on condensation.
description: 10 pages, 3 figures
Nonanalytic extensions of the extreme Reissner-Nordstroem metric in terms of weak solutions
Creators: name: Graf, Wolfgang
Publisher: name: arXiv
Year: 2001
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: A basic extension of the exterior part of the extreme Reissner-Nordstroem solution in terms of a continuous metric and gauge potential is constructed. This extension is not smooth at the null hypersurface given by the Cauchy-Killing horizon which separates isometric copies of the exterior metric. The Maxwell-Einstein system of equations is satisfied only in a weak sense. The manifold is topologically incomplete and the spherical symmetry is globally broken down to an axial symmetry. This behaviour can be attributed to the effect of a 'topological string', in the sense of a infinitesimally thin closed stringlike object 'sitting on the rim' of the black hole and holding it open by means of an accompanying impulsive gravitational wave. The resulting differentiable manifold and the corresponding horizons are not anymore simply connected, being 'pierced' by the strings.
description: 28 pages, 4 figures, IOP macros (MYIOPART.CLS). Added appendix plus two references. Accepted for publication by Class. Quant. Gravity