cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Efficiency and Effectiveness Impacts of a Computer-Assisted Scheduling and Dispatching System Implementation
Creators: name: Metaxatos, Paul
name: Pagano, Anthony M.
name: Metaxatos, Paul
name: Pagano, Anthony M.
Publisher: name: Unknown
Year: 2004
Subjects: Research and Development/Tech Change/Emerging Technologies

description: Computer-assisted scheduling and dispatch (CASD) systems have been implemented in many paratransit systems in the United States to improve the effectiveness and efficiency of operations. This paper contributes to the limited literature of studies documenting the impact of such systems on paratransit operations based on the implementation of such a system in a small city in Illinois. The analysis provides evidence of small but measurable efficiency and effectiveness gains. This paper also provides evidence that proper CASD evaluation efforts should allow enough time after implementation so that not only familiarity with the system has been established, but also most or all of the necessary organizational changes related to the new technology have been completed.
A Multi-Objective Decision-Making Framework for Transportation Investments
Creators: name: Chowdhury, Mashrur
name: Tan, Pulin
name: Chowdhury, Mashrur
name: Tan, Pulin
Publisher: name: Unknown
Year: 2004
Subjects: Community/Rural/Urban Development

description: This paper presents a framework based on multi-objective optimization that can be used to generate and analyze the most desirable transportation investment options based on their objectives and constraints. The framework, which is based on the surrogate worth trade-off analysis, could be applied to both discrete or continuous decision-problem scenarios. In a discrete problem, a pre-defined set of alternatives is available, whereas continuous problems are not characterized by a pre-defined set of alternatives. This framework was applied with the data generated for a Capital Beltway Corridor investment study. The multi-objective decisionmaking framework was found to be adaptable to this typical investment case study.
Setosiconops similis Published 2010, sp. nov.
Creators: name: Published, First
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Conopidae
Setosiconops
Setosiconops similis

description: Setosiconops similis, sp. nov. (Fig. 335)
 Type material. Holotype. ♂, Victoria: L1: nr Lake Hindmarsh, Big Desert Nat. Pk, 29–30 Nov. 1992; L2: Moulds, McAlpine, McEvey (AM).
description: Published as part of Published, First, 2010, A taxonomic revision of Australian Conopidae (Insecta: Diptera) 2581, pp. 1-246 in Zootaxa 2581 on page 160
The Future of Gravitational Optics
Creators: name: Blandford, R. D.
Publisher: name: arXiv
Year: 2001
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In this speculative, millenial essay, I try to anticipate what sort of novel gravitational optics investigations might be observed, after it becomes possible to map and monitor roughly a trillion sources (of which a billion may be usefully variable) comprehensively throughout electromagnetic and other spectra over the whole sky. Existing techniques suffice to produce three dimensional maps of the dark matter distribution of the accessible universe, to explore black hole spacetimes and to magnify images of the first luminous sources, terrestrial planets and compact objects.
description: 4 pages PASP Millenium Essay in press
History effects and pinning regimes in solid vortex matter
Creators: name: Valenzuela, Sergio O.
name: Bekeris, Victoria
Publisher: name: arXiv
Year: 2002
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We propose a phenomenological model that accounts for the history effects observed in ac susceptibility measurements in YBa2Cu3O7 single crystals [Phys. Rev. Lett. 84, 4200 (2000) and Phys. Rev. Lett. 86, 504 (2001)]. Central to the model is the assumption that the penetrating ac magnetic field modifies the vortex lattice mobility, trapping different robust dynamical states in different regions of the sample. We discuss in detail on the response of the superconductor to an ac magnetic field when the vortex lattice mobility is not uniform inside the sample. We begin with an analytical description for a simple geometry (slab) and then we perform numerical calculations for a strip in a transverse magnetic field which include relaxation effects. In calculations, the vortex system is assumed to coexist in different pinning regimes. The vortex behavior in the regions where the induced current density j has been always below a given threshold (j_c^>) is described by an elastic Campbell-like regime (or a critical state regime with local high critical current density, j_c^>). When the VS is shaken by symmetrical (e.g. sinusoidal) ac fields, the critical current density is modified to j_c^< (which is smaller than j_c^>) at regions where vortices have been forced to oscillate by a current density larger than j_c^>. Experimentally, an initial state with high critical current density (j_c^>) can be obtained by zero field cooling, field cooling (with no applied ac field) or by shaking the vortex lattice with an asymmetrical (e.g. sawtooth) field. We compare our calculations with experimental ac susceptibility results in YBa2Cu3O7 single crystals.
description: 11 pages, 7 figures. To be published in PRB
Domain Walls and Flux Tubes in N=2 SQCD: D-Brane Prototypes
Creators: name: Shifman, M.
name: Yung, A.
Publisher: name: arXiv
Year: 2002
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: This paper could have been entitled "D branes and strings from flesh and blood." We study field theoretic prototypes of D branes/strings. To this end we consider (2+1)-dimensional domain walls in (3+1)-dimensional N=2 SQCD with SU(2) gauge group and two quark flavors in the fundamental representation. This theory is perturbed by a small mass term of the adjoint matter which, in the leading order in the mass parameter, does not break N=2 supersymmetry, and reduces to a (generalized) Fayet-Iliopoulos term in the effective low-energy N=2 SQED. We find 1/2 BPS-saturated domain wall solution interpolating between two quark vacua at weak coupling, and show that this domain wall localizes a U(1) gauge field. To make contact with the brane/string picture we consider the Abrikosov-Nielsen-Olesen magnetic flux tube in one of two quark vacua and demonstrate that it can end on the domain wall. We find an explicit 1/4 BPS-saturated solution for the wall/flux tube junction. We verify that the end point of the flux tube on the wall plays the role of an electric charge in the dual (2+1)-dimensional SQED living on the wall. Flow to N=1 theory is discussed. Our results lead us to a conjecture regarding the notorious "missing wall" in the solution of Kaplunovsky et al.
description: 41 pages, 5 figures, Sect. 9.3 expanded, typos corrected
Smartiomyia Krober
Creators: name: Published, First
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Conopidae
Smartiomyia

description: Genus SMARTIOMYIA Kröber (Figs 308, 309)   SMARTIOMYIA Kröber 1940: 72. Type species: Smartiomyia obscura Kröber, by monotypy.
description: Published as part of Published, First, 2010, A taxonomic revision of Australian Conopidae (Insecta: Diptera) 2581, pp. 1-246 in Zootaxa 2581 on page 161
Short-range repulsion and isospin dependence in the KN system
Creators: name: Hadjimichef, D.
name: Haidenbauer, J.
name: Krein, G.
Publisher: name: arXiv
Year: 2002
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The short-range properties of the KN interaction are studied within the meson-exchange model of the Juelich group. Specifically, dynamical explanations for the phenomenological short-range repulsion, required in this model for achieving agreement with the empirical KN data, are explored. Evidence is found that contributions from the exchange of a heavy scalar-isovector meson (a_0(980)) as well as from genuine quark-gluon exchange processes are needed. Taking both mechanisms into account a satisfactory description of the KN phase shifts can be obtained without resorting to phenomenological pieces.
description: 26 pages, 5 figures
Additional file 1: of FluoRender: joint freehand segmentation and visualization for many-channel fluorescence data analysis
Creators: name: Wan, Yong
name: Otsuna, Hideo
name: Holman, Holly
name: Brig Bagley
name: Ito, Masayoshi
name: A. Lewis
name: Colasanto, Mary
name: Kardon, Gabrielle
name: Ito, Kei
name: Hansen, Charles
Publisher: name: figshare
Year: 2019
Subjects: subject: Biochemistry
subject: Space Science
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Developmental Biology
subject: Science Policy

description: The supplementary material includes supplementary methods and supplementary results. (DOCX 29 kb)
Burglary in London: Insights from Statistical Heterogeneous Spatial Point Processes
Creators: name: Povala, Jan
name: Virtanen, Seppo
name: Girolami, Mark
Publisher: name: arXiv
Year: 2019
Subjects: subject: Applications (stat.AP)
subject: Computation (stat.CO)
subject: FOS: Computer and information sciences

description: To obtain operational insights regarding the crime of burglary in London we consider the estimation of effects of covariates on the intensity of spatial point patterns. By taking into account localised properties of criminal behaviour, we propose a spatial extension to model-based clustering methods from the mixture modelling literature. The proposed Bayesian model is a finite mixture of Poisson generalised linear models such that each location is probabilistically assigned to one of the clusters. Each cluster is characterised by the regression coefficients which we subsequently use to interpret the localised effects of the covariates. Using a blocking structure of the study region, our approach allows specifying spatial dependence between nearby locations. We estimate the proposed model using Markov Chain Monte Carlo methods and provide a Python implementation.
description: Accepted at the Journal of the Royal Statistical Society Series C: Applied Statistics
Frenet-Serret dynamics
Creators: name: Arreaga, G.
name: Capovilla, R.
name: Guven, J.
Publisher: name: arXiv
Year: 2001
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We consider the motion of a particle described by an action that is a functional of the Frenet-Serret [FS] curvatures associated with the embedding of its worldline in Minkowski space. We develop a theory of deformations tailored to the FS frame. Both the Euler-Lagrange equations and the physical invariants of the motion associated with the Poincaré symmetry of Minkowski space, the mass and the spin of the particle, are expressed in a simple way in terms of these curvatures. The simplest non-trivial model of this form, with the lagrangian depending on the first FS (or geodesic) curvature, is integrable. We show how this integrability can be deduced from the Poincaré invariants of the motion. We go on to explore the structure of these invariants in higher-order models. In particular, the integrability of the model described by a lagrangian that is a function of the second FS curvature (or torsion) is established in a three dimensional ambient spacetime.
description: 20 pages, no figures - replaced with version to appear in Class. Quant. Grav. - minor changes, added Conclusions section
Tanyconops Published 2010
Creators: name: Published, First
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Conopidae
Tanyconops

description: Key to Australian species of Tanyconops
 1. Postpronotal lobe entirely yellow; frons, except narrow fronto-orbital region, yellowish brown; M meeting R4+5 at right angles; R 4+5 almost straight, not arching before apex of M............................ luteus sp. nov.
-. Postpronotal lobe brown at least anteriorly; frons usually brown at least posteromedially; M meeting R4+5 at slightly less than right angles; R4+5 arching before apex of M (Fig. 320)........................................ 2.
 2. Eye length less than height; femora mainly yellow................................... longicaudus sp. nov.
 -. Eye length greater than height (Fig. 323); femora extensively dark brown dorsally............ ocellatus sp. nov.
description: Published as part of Published, First, 2010, A taxonomic revision of Australian Conopidae (Insecta: Diptera) 2581, pp. 1-246 in Zootaxa 2581 on page 171
A Comprehensive Approach for Rolling Stock Planning: Combining Train Performance Simulation and Life-Cycle Cost Analysis
Creators: name: Liu, Rongfang
name: Song, Albert C.
name: Nelson, David O.
name: Liu, Rongfang
name: Song, Albert C.
name: Nelson, David O.
Publisher: name: Unknown
Year: 2004
Subjects: Community/Rural/Urban Development

description: Rolling stock has a limited life span during which it can provide efficient service. Faced with today’s budget constraints and economic slowdown, all railroad or transit operators will eventually face the following questions: What is the most suitable equipment available to replace the existing equipment for the particular service? What is the most economic way of procuring the required fleet? To answer those questions, various railroad agencies and transit operators used diversified measures such as capacity demanded by the ridership forecast, performance afforded by the proposed equipment, or the operating and capital cost associated with certain rolling stock configurations. However, comprehensive analyses based on all three factors mentioned above are rare, even though it is agreed that all those factors affect railroad services simultaneously and they all should be considered in the rolling stock planning process. To fill the gap, this paper describes a comprehensive approach to select long-term rolling stock for commuter services. This approach not only considers the performance of the proposed equipment but also evaluates the life cycle costs of the proposed fleet configuration. A case study of rolling stock planning for a commuter rail service is included to demonstrate the practical application of the suggested approach. Combining the train performance simulation (TPS) and life cycle cost (LCC) analysis, the proposed approach derives an optimal balance between service costs and service quality. Moreover, by incorporating the timing of the new equipment purchases into the life cycle cost, this approach further maximizes the return on capital investment for transit agencies.
On the Ultra-Reliable and Low-Latency Communications in Flexible TDD/FDD 5G Networks
Creators: name: Esswie, Ali A.
name: Pedersen, Klaus I.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: The ultra-reliable and low-latency communication (URLLC) is the key driver of the current 5G new radio standardization. URLLC encompasses sporadic and small-payload transmissions that should be delivered within extremely tight radio latency and reliability bounds, i.e., a radio latency of 1 ms with 99.999% success probability. However, such URLLC targets are further challenging in the 5G dynamic time division duplexing (TDD) systems, due to the switching between the uplink and downlink transmission opportunities and the additional inter-cell cross-link interference (CLI). This paper presents a system level analysis of the URLLC outage performance within the 5G new radio flexible TDD systems. Specifically, we study the feasibility of the URLLC outage targets compared to the case with the 5G frequency division duplexing (FDD), and with numerous 5G design variants. The presented results therefore offer valuable observations on the URLLC outage performance in such deployments, and hence, introducing the state-of-the-art flexible-FDD technology.
Effects of Light and Commuter Rail Transit on Land Prices: Experiences in San Diego County
Creators: name: Cervero, Robert
name: Cervero, Robert
Publisher: name: Unknown
Year: 2004
Subjects: Land Economics/Use

description: Using hedonic price models, appreciable land-value premiums were found for multiple land uses in different rail corridors of San Diego County. The most appreciable benefits were for condominiums and single-family housing near commuter-rail stations in the north county, multifamily housing near light-rail stations, and commercial properties near downtown commuterrail stations and light-rail stops in the Mission Valley. Elsewhere, commercial properties accrued small or even negative capitalization benefits. Pro-development policies, worsening traffic congestion, and a generally healthy economy are thought to have generally boosted land values in San Diego County, though impacts are corridor- and land-use specific.
Higher-Rank Tensor Non-Abelian Field Theory: Higher-Moment or Subdimensional Polynomial Global Symmetry, Algebraic Variety, Noether's Theorem, and Gauging
Creators: name: Wang, Juven
name: Xu, Kai
name: Yau, Shing-Tung
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: With a view toward a fracton theory in condensed matter, we introduce a higher-moment polynomial degree-p global symmetry, acting on complex scalar/vector/tensor fields (e.g., ordinary or vector global symmetry for p$=0$ and p$=1$ respectively). We relate this higher-moment global symmetry of $n$-dimensional space, to a lower degree (either ordinary or higher-moment, e.g., degree-(p-$\ell$)) subdimensional or subsystem global symmetry on layers of $(n-\ell)$-submanifolds. These submanifolds are algebraic affine varieties (i.e., solutions of polynomials). The structure of layers of submanifolds as subvarieties can be studied via mathematical tools of embedding, foliation, and algebraic geometry. We also generalize Noether's theorem for this higher-moment polynomial global symmetry. We can promote the higher-moment global symmetry to a local symmetry, and derive a new family of higher-rank-m symmetric tensor gauge theory by gauging, with m = p$+1$. By further gauging a discrete $\mathbb{Z}_2^C$ charge conjugation (particle-hole) symmetry, we derive a new general class of rank-m tensor non-abelian gauge field theory (the gauge structure is non-commutative thus non-abelian but not an ordinary group): a hybrid class of (symmetric or non-symmetric) higher-rank-m tensor gauge theory and anti-symmetric tensor topological field theory, generalizing [arXiv:1909.13879], interplaying between gapless and gapped sectors.
description: 23 pages. Sequel to arXiv:1909.13879, arXiv:1912.13485. Dedicated to 90 years of Gauge Principle since Hermann Weyl. v2: clarifications added
On the Factors that Affect Airline Flight Frequency and Aircraft Size
Creators: name: Pai, Vivek
name: Pai, Vivek
Publisher: name: Unknown
Year: 2009
Subjects: Research and Development/Tech Change/Emerging Technologies
Research Methods/ Statistical Methods

description: This paper assesses the determinants of aircraft size and frequency of flights on airline routes by considering market demographics, airport characteristics, airline characteristics and route characteristics. The paper shows that frequency and aircraft size increase with population, income, and runway length. An increase in the proportion of managerial workers in the labor force or the proportion of population below the age of 25 results in greater frequency with the use of small planes. Slot constrained airports and an increase in the number of nearby airports lead to lower flight frequency with the use of smaller planes. Hubs and low cost carriers are associated with larger plane sizes and higher frequency, while regional airline ownership leads to higher frequency and the use of smaller planes. An increase in distance between the endpoints leads to lower frequency with the use of larger planes. As airport delay rises, airlines reduce frequency and use smaller planes, though when airport cancellations rise, flight frequency increases with the use of larger planes. This finding suggests airlines utilize frequency and aircraft size to hedge against flight cancellations.
Tanyconops luteus Published 2010, sp. nov.
Creators: name: Published, First
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Conopidae
Tanyconops
Tanyconops luteus

description: Tanyconops luteus, sp. nov. (Fig. 342)
 Type material. Holotype. ♀, Queensland: 15 km W Windorah, 24.ix.1983, S. R. Monteith, on Eucalyptus terminalis (UQIC).
description: Published as part of Published, First, 2010, A taxonomic revision of Australian Conopidae (Insecta: Diptera) 2581, pp. 1-246 in Zootaxa 2581 on page 173
Novel Josephson effects between multi-gap and single-gap superconductors
Creators: name: Agterberg, D. F.
name: Demler, Eugene
name: Janko, B.
Publisher: name: arXiv
Year: 2002
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Multi-gap superconductors can exhibit qualitatively new phenomena due to existence of multiple order parameters. Repulsive electronic interactions may give rise to a phase difference of $π$ between the phases of the order parameters. Collective modes due to the oscillation of the relative phases of these order parameters are also possible. Here we show that both these phenomena are observable in Josephson junctions between a single-gap and a multi-gap superconductor. In particular, a non-monotonic temperature dependence of the Josephson current through the junction reveals the existence of the $π$ phase differences in the multi-gap superconductor. This mechanism may be relevant for understanding several experiments on the Josephson junctions with unconventional superconductors. We also discuss how the presence of the collective mode resonantly enhances the DC Josephson current when the voltage across the junction matches the mode frequency. We suggest that our results may apply to MgB$_2$, 2H-NbSe$_2$, spin ladder and bilayer cuprates.
description: 4 pages, 2 figures
Epilogue
Creators: name: Blandford, R. D.
Publisher: name: arXiv
Year: 2001
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: There are now several types of relativistic flows in astrophysical settings. The foremost examples are jets and disks orbiting spinning black holes, pulsar winds and gamma ray bursts. As discussed at this meeting, these flows exhibit unusual kinematic and dynamical properties, that distinguish them from non-relativistic flows. It is possible that all collimated outflows are essentially hydromagnetic or electromagnetic. Future study of relativistic flows will rely heavily on numerical experiments. Model relativistic flows provide a basis for carrying out secondary studies of the underlying plasma physics, particle acceleration, magnetic field amplification and the emission and transfer of radiation, particularly at shock fronts. Some current opportunities in observation, phenomenology and theory are briefly suggested.
description: 11 pages. Similarities and Universality in Relativistic Flows ed. M. Georganopoulos, A. Guthmann, K. Manolakou & A. Markowith (Berlin:Springer) in press
Joyful infographics: added educational value? : Exploring the impact of emotion-driven design strategies on learning
Creators: name: Dogley, Anna-Louisa
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2023
Subjects: subject: emotional design
subject: cognitive theory of multimedia learning
subject: infographics
subject: comparative study
subject: seductive detail
subject: 740
subject: 370

description: This thesis examines the impact of emotion-driven strategies on multimedia learning among highly educated individuals. Three of Nigel Holmes’ criteria for creating joyful infographics- drawings, visual prosody and human presence- are tested for their ability to support learning. Through a comparative study in the form of online surveys, the thesis investigates and measures the difference in retention and transfer performances between participants from treatment and control groups. The results show that the three features positively impacted transfer performances but had no observable impact on retention performances. Other observations included that the presence of faces itself directly and positively impacted transfer performances. A positive but indirect impact was also noticeable from the combination of the three features as they encouraged engagement with information beyond the infographic’s visual aid but with the text information provided by the infographic.
“Hacer nuestra la existencia de un vacío”: el entramado intertextual de Los girasoles ciegos como instrumento de cohesión entre las cuatro “derrotas”
Creators: name: Rossi, Maura
Publisher: name: Artifara
Year: 2022

description: Este artículo pretende dibujar un mapa de la compleja geografía intertextual que se aprecia en Los girasoles ciegos de Alberto Méndez, una colección de cuatro cuentos entrelazados que hace del compromiso del autor con la celebración en la España contemporánea de un duelo compartido su bandera narrativa. Enteramente centrada en la elaboración transgeneracional de un sistema (extra)ficcional de confrontación con el trauma común de la guerra civil española y de la primera postguerra, la obra enfatiza los lazos de conexión –a veces manifiestos, a veces ocultos– entre cuatro historias de vencedores y vencidos que resultan todos, inexorablemente, derrotados por el conflicto. A través de un viaje puntual por las encrucijadas intertextuales que unen transversalmente los cuatro cuentos, se intentará analizar las implicaciones, los significados y los efectos de una presencia del texto “otro” que resulta a la vez abrumadora, fascinante y cargada de significados. Palabras clave: Alberto Méndez, Los girasoles ciegos, intertextualidad, postmemoria, literatura española ultracontemporánea. This article aims at tracing a map of the complex intertextual geography that can be detected in Alberto Méndez’s Los girasoles ciegos, a cycle of four interconnected short stories articulated upon the compromise of the author towards the celebration in contemporary Spain of a shared mourning. Entirely shaped in the transgenerational elaboration of an (extra)fictional system of confrontation with the collective trauma of the Spanish civil war and post-war period, the collection emphasises the –sometimes evident, some other secluded– connections among four stories of historical winners or losers of the conflict, who come to be all equally defeated by it. Through a careful journey through the intertextual crossroads which transversally join the four parts of the book, the argumentation will devote itself to the analysis of the implications, meanings and effects of a presence of the “alien” text which seems at the same time overwhelming, fascinating and loaded with implications. Keywords: Alberto Méndez, Los girasoles ciegos, intertextuality, postmemory, ultracontemporary Spanish literature.
description: Artifara, No 21.2 (2021)
Modalanalyse elementarer Strukturen mit Hilfe der Finiten Elemente Methode
Creators: name: Ji, Haowei
Publisher: name: Hochschulbibliothek, Hochschule Merseburg
Year: 2022
Subjects: subject: ANSYS-Workbench 2022R2
subject: Modalanalyse
subject: dynamisches Verhalten
subject: Eigenfrequenzen
subject: DDC::6** Technik, Medizin, angewandte Wissenschaften::67* Industrielle Fertigung::670 Industrielle Fertigung

description: 7 1. Einleitung 1.1 Motivation Im Jahr 2021 habe ich ein Praktikum in China absolviert. Während des Praktikums habe ich mich hauptsächlich mit der Modellierung und Optimierung von Stanzfor-men beschäftigt. Unternehmen müssen bei der Entwicklung neuer Produkte immer noch viele Ressourcen und Arbeitskräfte aufwenden, um verschiedene Formen herzustellen und sie dann zu testen. Es wäre jedoch effizienter und kostengünsti-ger, wenn die Computertechnologie zur Modellierung des Produkts und zur Ana-lyse der darin enthaltenen potenziellen Probleme eingesetzt werden könnte. Daher ist es sinnvoll, ein Thema über den Einsatz von Computersimulationssoftware zur Datenanalyse und zur Entwicklung verschiedener Problemlösungen zu untersu-chen.
Molecular dynamics simulations reveal R399Q mutation disrupts XRCC1-polβ interaction, potentially impairing DNA base excision repair pathway
Creators: name: Goswami, Nabajyoti
name: Dutta, Rupam
name: Browne, Rene Barbie
name: Borah, Probodh
name: Mahanta, Saurov
name: Medhi, Subhash
Publisher: name: Taylor & Francis
Year: 2025
Subjects: subject: Biophysics
subject: Biochemistry
subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Chemical Sciences not elsewhere classified
subject: Information Systems not elsewhere classified
subject: Cancer

description: Mutations in XRCC1 can disrupt essential protein–protein interactions required for DNA base excision repair, potentially leading to genomic instability and increased cancer risk. This study employs large-scale molecular dynamics simulations to investigate the structural and functional consequences of the R399Q mutation on interactions with DNA ligase IIIα and DNA polymerase β. The results reveal that while the mutant protein retains a stable interaction with DNA ligase IIIα, key residues such as Gly 511, Glu 538, Arg 564, Thr 567 and Ala 568, which form critical hydrogen bonds, exhibit subtle rearrangements. In contrast, binding to DNA polymerase β is significantly destabilized, disrupting key interactions involving Glu 85, Ser 92, Arg 109 and Gly 556. Free energy calculations confirm a substantial reduction in binding affinity between the mutant protein and DNA polymerase β, suggesting an impaired repair efficiency. Unlike previous studies that relied on static structural models or biochemical characterizations, this research provides dynamic, atomic-level insights into how the mutation alters protein stability and interactions over biologically relevant timescales. These findings reconcile conflicting experimental observations and establish a computational framework for understanding mutation-driven defects in DNA repair. Interestingly, the data generated by these extensive simulations resemble empirical findings regarding XRCC1’s interactions with BER enzymes. The study thus provides valuable insights into how the R399Q mutation impairs XRCC1’s interactions with key DNA repair enzymes, potentially leading to defects in the DNA repair pathway and offering a computational perspective that aligns with experimental observations.
Perturbations of an exact solution for 2+1 dimensional critical collapse
Creators: name: Garfinkle, David
name: Gundlach, Carsten
Publisher: name: arXiv
Year: 2002
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We find the perturbation spectrum of a family of spherically symmetric and continuously self-similar (CSS) exact solutions that appear to be relevant for the critical collapse of scalar field matter in 2+1 spacetime dimensions. The rate of exponential growth of the unstable perturbation yields the critical exponent. Our results are compared to the numerical simulations of Pretorius and Choptuik and are inconclusive: We find a CSS solution with exactly one unstable mode, which suggests that it may be the critical solution, but another CSS solution which has three unstable modes fits the numerically found critical solution better.
description: references added, treatment shortened
Nonmesonic Weak Decay of $Λ$ Hypernuclei within a Nuclear Matter Formalism
Creators: name: Bauer, E.
name: Krmpotic, F.
Publisher: name: arXiv
Year: 2002
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The nonmesonic weak decay of $Λ$ hypernuclei using nonrelativistic nuclear matter is studied. As the basic building block we use the Polarization Propagator Method developed by Oset and Salcedo. It is shown that the exact calculation of exchange terms is required. Using the Local Density Approximation we evaluate the nonmesonic decay width for $^{12}_ΛC$ and compare the result with a finite nucleus calculation, obtaining a qualitative agreement.
description: 28 pages, 3 figures
A Practical Solution for SAR Despeckling With Adversarial Learning Generated Speckled-to-Speckled Images
Creators: name: Yuan, Ye
name: Guan, Jian
name: Feng, Pengming
name: Wu, Yanxia
Publisher: name: arXiv
Year: 2019
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: In this letter, we aim to address a synthetic aperture radar (SAR) despeckling problem with the necessity of neither clean (speckle-free) SAR images nor independent speckled image pairs from the same scene, and a practical solution for SAR despeckling (PSD) is proposed. First, an adversarial learning framework is designed to generate speckled-to-speckled (S2S) image pairs from the same scene in the situation where only single speckled SAR images are available. Then, the S2S SAR image pairs are employed to train a modified despeckling Nested-UNet model using the Noise2Noise (N2N) strategy. Moreover, an iterative version of the PSD method (PSDi) is also presented. Experiments are conducted on both synthetic speckled and real SAR data to demonstrate the superiority of the proposed methods compared with several state-of-the-art methods. The results show that our methods can reach a good tradeoff between feature preservation and speckle suppression.
description: 5 pages, 4 figures
Trading schemes for greenhouse gas emissions from European agriculture: A comparative analysis based on different implementation options
Creators: name: Pérez Domínguez, Ignacio
name: Britz, Wolfgang
name: Holm-Müller, Karin
name: Pérez Domínguez, Ignacio
name: Britz, Wolfgang
name: Holm-Müller, Karin
Publisher: name: Unknown
Year: 2009
Subjects: subject: Environmental Economics and Policy
subject: Kyoto Protocol
subject: agricultural policy
subject: economic modelling
subject: tradable emission permits

description: A rational negotiation strategy for coming multilateral negotiations regarding climate change requires knowledge about possible social, economic and environmental effects of policy instruments for the abatement of greenhouse gas emissions. With this purpose, an agricultural sector model is expanded to cover greenhouse gas emissions from agricultural sources in Europe and policy instruments for their reduction. This modelling approach concentrates on the application of a permit trade scheme for emission abatement within the Kyoto Protocol ‘first commitment’ baseline. The effects derived of three alternative schemes are described in detail: the EU ‘burden sharing’ agreement option defined as regional emission standards, emission trading between regions inside each Member State, and finally, emission trading between all European regions. The analysis shows the importance of selecting an adequate combination of instruments of emission abatement for the design of efficient emission reduction policies.
Nonabelian braid statistics versus projective permutation statistics
Creators: name: Read, N.
Publisher: name: arXiv
Year: 2002
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Recent papers by Finkelstein, Galiautdinov, and coworkers {[J. Math. Phys. 42, 1489, 3299 (2001)]} discuss a suggestion by Wilczek that nonabelian projective representations of the permutation group can be used as a new type of particle statistics, valid in any dimension. Wilczek's suggestion was based in part on an analysis by Nayak and Wilczek (NW) of the nonabelian representation of the braid group in a quantum Hall system. We point out that projective permutation statistics is not possible in a local quantum field theory as it violates locality, and show that the NW braid group representation is not equivalent to a projective representation of the permutation group. The structure of the finite image of the braid group in a 2^{n/2-1}-dimensional representation is obtained.
description: 4 pages, RevTeX. v. 2: added refs and some small changes
Constrained Market Pricing and Revenue Adequacy: Regulatory Implications for Shippers and Class I U.S. Freight Railroads
Creators: name: McCullough, Gerard J.
name: McCullough, Gerard J.
Publisher: name: Unknown
Year: 2015
Subjects: Demand and Price Analysis
Industrial Organization
Research and Development/Tech Change/Emerging Technologies

description: AMS Summary available at http://dx.doi.org/10.9752/TS215.10-2015.
Tactusa artus FIBIGER, 2010, new species
Creators: name: FIBIGER, MICHAEL
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Erebidae
Tactusa
Tactusa artus

description: Tactusa artus a Fibiger, new species
(Plate 3, figure 6; male genit. plate 13, figure 4)
 Material examined. Holotype: male, Thailand NW, Chang Mai, Samoeng / Hang Dong Rd, 15 km, 750 m, 3.ii.1989, leg. A.M. Cotton & I.J. Kitching, BM 1989-57, genit. prep. 3519 M. Fibiger, coll. BMNH.
 Diagnosis. Imago (external). Wingspan: 12 mm.
Forewing: long and narrow; ground colour yellowish, with basal-costal patch and dorso-medial triangular patch; yellowish between basal and antemedial lines; all subterminal and terminal areas, except for four small beige costal dots, blackish brown, including fringes; subterminal and terminal lines beige (apo.).
Crosslines: subterminal and terminal lines beige.
Reniform stigma: invisible (apo.).
Hindwing: whitish grey, with indistinct discal spot.
Underside: unicolorous grey.
Abdomen: grey with black crest dorsally on first segment.
 Male genitalia. Tegumen: relatively strongly built.
Vinculum: even more strongly built.
Saccus: short, strongly built, U shaped.
Fultura superior: membranous.
Valvae: slightly asymmetrical, left one broader.
Ampulla: forming a cross with axis of valva; slightly asymmetrical; broadest by valva; arms narrow, dorsal arm shorter, broader, upturned, apically with small, stout spines; ventral arm longer, narrower, tapered (apo.).
Digitus: present; asymmetrical, triangular, narrow, pointed apically (apo.).
Juxta and anellus plate: fused, slightly asymmetrical, almost quadrangular, slightly constricted medially (apo.).
Phallus: strongly enlarged at ductus ejaculatorius; tapered from middle, and distally forming a long, narrow, curved, smoothly upturned cylinder.
Vesica: unarmed.
 Female genitalia. Unknown.
 Differential diagnosis. T. artus differs from T. biartus in narrower ampulla, constricted juxta-anellus plate, absence of a digitus in T. biartus, and similar phallus, which is straighter and narrower. These two species differ from other members of species-group in combination of three characters: shape and outer edges of very large patch on forewing, and in male genitalia narrow and smoothly curved ampulla, and shape of juxtaanellus plate. General features of these three character states also separate them from other Micronoctuidae from E and SE Asia and Oriental region.
 Distribution. Known from one specimen from NW Thailand.
description: Published as part of FIBIGER, MICHAEL, 2010, Revision of the Micronoctuidae (Lepidoptera: Noctuoidea) Part 3, Taxonomy of the Tactusinae, pp. 1-119 in Zootaxa 2583 (1) on page 29, DOI: 10.11646/zootaxa.2583.1.1, http://zenodo.org/record/10094382
Black Holes and Relativistic Jets
Creators: name: Blandford, R. D.
Publisher: name: arXiv
Year: 2001
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: There is strong observational evidence that AGN, Galactic X-ray transients and (probably) $γ$-ray bursts are associated with black holes, and that these sources are able to form collimated, ultrarelativistic outflows. There is much interest in trying to understand how these prime movers are able to release energy from accreting gas and their own spin energy. Electromagnetic field plays a large role in many of the mechanisms under active consideration. In this article, several of the many possible ``metabolic pathways'' through which mass, angular momentum and energy can flow around and away from black hole magnetospheres are discussed. Particular importance is attached to the interactions between the inflowing disk, the outflowing wind, the black hole and the jet. Some important unresolved questions are identified and it is argued that large scale numerical computation will almost certainly be necessary to address them.
description: 21 pages Progress of Theoretical Physics Supplement in press
Die Entwicklung der Medienpädagogik an deutschen Sekundarschulen im Kontext der wachsenden Bedeutung künstlicher Intelligenz
Creators: name: Wischerhoff, Clara Marie
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt, Halle (Saale)
Year: 2024
Subjects: subject: Medienbildung
subject: Künstliche Intelligenz
subject: Bild- und Videogenerierung
subject: Meinungsbildung
subject: Informationsbildung
subject: 370

description: Die vorliegende wissenschaftliche Arbeit behandelt die notwendige Veränderung von Medienpädagogik an deutschen Sekundarschulen im Kontext der wachsenden Bedeutung generativer künstlicher Intelligenz (KI). Die Forschungsfrage beschäftigt sich damit, inwieweit bisherige Methoden der Medienpädagogik in Bezug auf KI verändert oder erweitert werden müssen. Die Hintergründe und Begrifflichkeiten von künstlicher Intelligenz sowie die Bedeutung dieser für die Gesellschaft und das Bildungssystem werden erläutert. Ein besonderer Fokus liegt dabei auf Bild- und Videogenerierung. Aktuelle Literatur sowie Studien zu dem Thema werden analysiert und ältere Methoden werden auf das neue Feld der künstlichen Intelligenz angewendet. Schließlich werden konkrete Anwendungsbeispiele zum Einsatz von künstlicher Intelligenz im Schulunterricht erläutert, welche sich sowohl auf KI als Methode zur Erschließung anderer Lerninhalte als auch auf KI als eigenen Lerninhalt beziehen.
An Alternative Cross Entropy Loss for Learning-to-Rank
Creators: name: Bruch, Sebastian
Publisher: name: arXiv
Year: 2019
Subjects: subject: Machine Learning (cs.LG)
subject: Information Retrieval (cs.IR)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: Listwise learning-to-rank methods form a powerful class of ranking algorithms that are widely adopted in applications such as information retrieval. These algorithms learn to rank a set of items by optimizing a loss that is a function of the entire set -- as a surrogate to a typically non-differentiable ranking metric. Despite their empirical success, existing listwise methods are based on heuristics and remain theoretically ill-understood. In particular, none of the empirically successful loss functions are related to ranking metrics. In this work, we propose a cross entropy-based learning-to-rank loss function that is theoretically sound, is a convex bound on NDCG -- a popular ranking metric -- and is consistent with NDCG under learning scenarios common in information retrieval. Furthermore, empirical evaluation of an implementation of the proposed method with gradient boosting machines on benchmark learning-to-rank datasets demonstrates the superiority of our proposed formulation over existing algorithms in quality and robustness.
Reconcile Planck-scale discreteness and the Lorentz-Fitzgerald contraction
Creators: name: Rovelli, Carlo
name: Speziale, Simone
Publisher: name: arXiv
Year: 2002
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: A Planck-scale minimal observable length appears in many approaches to quantum gravity. It is sometimes argued that this minimal length might conflict with Lorentz invariance, because a boosted observer could see the minimal length further Lorentz contracted. We show that this is not the case within loop quantum gravity. In loop quantum gravity the minimal length (more precisely, minimal area) does not appear as a fixed property of geometry, but rather as the minimal (nonzero) eigenvalue of a quantum observable. The boosted observer can see the same observable spectrum, with the same minimal area. What changes continuously in the boost transformation is not the value of the minimal length: it is the probability distribution of seeing one or the other of the discrete eigenvalues of the area. We discuss several difficulties associated with boosts and area measurement in quantum gravity. We compute the transformation of the area operator under a local boost, propose an explicit expression for the generator of local boosts and give the conditions under which its action is unitary.
description: 12 pages, 3 figures
Tactusa similis Fibiger 2010, new species
Creators: name: FIBIGER, MICHAEL
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Erebidae
Tactusa
Tactusa similis

description: Tactusa similis Fibiger, new species
(Plate 4, figure 1; female genit. plate 23, figure 1)
 Material examined. Holotype: female, Thailand NW, Chiang Mai, 750 m, 11.xii.1985, leg. M.G. Allen, BM 1986-74, genit. prep. 3200 M. Fibiger, coll. BMNH.
 Diagnosis. Imago (external). Wingspan: 10 mm.
Forewing: relatively short and narrow; ground colour yellowish white, with basal-costal patch and dorsomedial triangular patch; white between basal and antemedial lines, and narrowly white between triangular patch and subterminal line; subterminal and terminal areas, including fringes blackish brown, except for two small beige areas near costa (apo.).
Crosslines: absent, except weakly marked subterminal and terminal lines (apo.).
Reniform stigma: invisible (apo.).
Hindwing: whitish, with indistinct discal spot.
Underside: unicolorous grey.
Abdomen: whitish, with black crest dorsally on first segment.
Posterior apophyses: slightly longer than anterior apophyses and ovipositor.
 Anterior apophyses: slightly longer than 8 th abdominal segment.
 Ostium: displaced to left; positioned prominently posterior on 8 th segment (apo.).
Antrum: cylindrical, very short, 1.5 times longer than wide (apo.).
Ductus bursae: membranous; narrow; coiled; very long, 3 times longer than diameter of corpus bursae.
Appendix bursae: arising anteriorly from ductus bursae, immediately after antrum.
Corpus bursae: globular.
Signum: cross shaped.
 Differential diagnosis. T. similis differs from other Micronoctuidae from SE Asian and Oriental regions in shape of large patch of forewing, weak subterminal and terminal lines; in female genitalia, posteriorly positioned ostium, very short antrum and very long, coiled ductus bursae.
 Distribution. Known from one specimen from N Thailand.
description: Published as part of FIBIGER, MICHAEL, 2010, Revision of the Micronoctuidae (Lepidoptera: Noctuoidea) Part 3, Taxonomy of the Tactusinae, pp. 1-119 in Zootaxa 2583 (1) on pages 30-31, DOI: 10.11646/zootaxa.2583.1.1, http://zenodo.org/record/10094382