cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Advanced methods and extensions for kernel-based object tracking
Creators: name: Nguyen, Quang Anh
Publisher: name: The Australian National University
Year: 2010
Subjects: subject: TA1634.N58 2010
subject: Computer vision
subject: Image processing Mathematical models

description: In today's world, the rapid developments in computing technology have generated a great deal of interest in automated video analysis systems such as smart cars, video indexing services and advanced surveillance networks. Amongst those, object tracking research plays a pivotal role in providing an unobtrusive means to detect, track and alert the presence of the objects of interest in a given scene with little to no supervisor interaction. The application fields for object tracking can vary from smart vehicles, advanced surveillance networks to sport analysis and perceptual user interfaces. The diversity in its applications also gives rise to a number of different tracking algorithms tailored to suit the corresponding scenarios and constraints. Along this line, the kernel-based tracker has emerged as one of the benchmark tracking algorithms due to its real-time performance, robustness to noise and tracking accuracy. In this thesis, we explore the possibility of further enhancing the original kernel-based tracker. We do this by firstly developing a probabilistic formulation for the mean-shift algorithm which, in turn, provides a means to estimate the target's severe transformations in size, shape and orientation. For changes in colour appearance due to poor lighting condition of the scene, we opt to combine multiple low complexity image features such as texture, contrast, brightness and colour to improve the tracking performance. To achieve this, we advocate the use of a graphical model to abstract the image features under study into a relational structure and, subsequently, make use of graph-spectral methods to combine them linearly and in a straight-forward manner. Furthermore, we also present an on-line updating method to adjust the tracking model to incorporate new changes in the image features during the course of tracking. To cope with the problem of object occlusion in a high density traffic area, we propose a geometric method to extend the mean-shift algorithm to a 3D setting by the use of multiple cameras with overlapped views of the scene. The methods presented in this thesis not only show significant performance improvements on real-world sequences over a number of benchmark algorithms, but also encompass high generalisation in the spatial and feature domains for future development purposes.
An Optimal Photon Counting Polarimeter
Creators: name: Ling, Alexander
name: Pang, Soh Kee
name: Lamas-Linares, Antia
name: Kurtsiefer, Christian
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present experimental results on a method to perform polarimetry on ensembles of single photons. Our setup is based on a measurement method known to be optimal for estimating the state of two level systems. The setup has no moving parts and is sensitive to weak sources (emitting single photons) of light as it relies on photon counting and has potential applications in both classical polarization measurements and quantum communication scenarios. In our implementation, we are able to reconstruct the Stokes parameters of pure polarization states with an average fidelity of 99.9%.
description: Rev 1, added references and revised title. Accepted by the Journal of Modern Optics
On the one-loop Kahler potential in five-dimensional brane-world supergravity
Creators: name: Falkowski, Adam
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present an on-shell formulation of 5d gauged supergravity coupled to chiral matter multiplets localized at the orbifold fixed points. The brane action is constructed via the Noether method. In such set-up we compute one-loop corrections to the Kahler potential of the effective 4d supergravity and compare the result with previous computations based on the off-shell formalism. The results agree at lowest order in brane sources, however at higher order there are differences. We explain this discrepancy by an ambiguity in resolving singularities associated with the presence of infinitely thin branes.
description: 20 pages
The free and safe fate of symmetry non-restoration
Creators: name: Bajc, Borut
name: Lugo, Adrian
name: Sannino, Francesco
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate the high temperature fate of four dimensional gauge-Yukawa theories featuring short distance conformality of either interacting or non-interacting nature. The latter is known as complete asymptotic freedom and, as templates, we consider non-abelian gauge theories featuring either two singlet scalars coupled to gauged fermions via Yukawa interactions or two gauged scalars with(out) fermions. For theories with interacting fixed points at short distance, known as asymptotically safe, we consider two calculable examples. Exploring the landscape of safe and free theories above we discover a class of complete asymptotically free theories for which symmetry breaks at arbitrary high temperatures. In its minimal form this class is constituted by a theory with two fundamental gauged scalars each gauged under an independent group.
description: 35 pages, section 2.2.5 and appendix C.5 added with new example of symmetry non-restoration: two SU(Nc) groups, each with a scalar adjoint
Towards a Chinese School of International Relations Theory : a historiographical and critical assessment
Creators: name: Lu, Peng
Publisher: name: The Australian National University
Year: 2012
Subjects: subject: JZ1238.C6 L8 2012
subject: International relations Study and teaching China
subject: China Foreign relations

description: This study is concerned with an academic phenomenon in contemporary Chinese International Relations (IR): scholars' collective attempts to build up a unique Chinese School of IR theory. This Chinese School movement has two distinct features, being academically ahistorical and future oriented. Because contemporary Chinese IR scholars deny the existence of Chinese IR before 1949, the Chinese School movement has no connection with previous attempts to understand modern international relations. Because there is no Chinese IR theory even after 30 years of serious searching, the image of a Chinese School as a paradigm which is more reliable than the existing Western IR theories is primarily based on a strong belief in the future success of a reliable Chinese IR theory. This study understands the Chinese School movement by exploring the meaning of these two features. It first reconstructs the academic history of Chinese IR from the late 1920s to the late 1970s. By comparing the academic performance of Chinese IR before 1949 and in Mao Ze-dong's era, the consensus that there was no Chinese IR before 1949 is falsified. Then it focuses on contemporary discourse of the Chinese School to find out how consensus has been gradually achieved concerning, respectively, the necessity of, the possibility of, and the way towards a Chinese IR theory. Finally it provides a general understanding of the Chinese School movement by bringing it back to the history of Chinese IR and specifies the political and academic features which heavily influence contemporary Chinese IR in general and the Chinese School movement in particular. This study contributes to the Chinese School movement in three ways. First, it provides a completely new history of Chinese IR, which has been widely ignored in the past. It hence opens a new space for further exploration of any Chinese academic way to deal with international relations. Second, it criticizes the common sense which Chinese IR scholars have taken for granted and used as the fundamental reason to prove and to construct a Chinese IR theory. As a result, it helps Chinese as well as Western IR scholars to have a better understanding of this unique academic phenomenon and hence a better understanding of any knowledge products in Chinese IR, which is heavily influenced by the Chinese School movement. Third, it provides a better foundation for the Chinese School movement and hence makes a Chinese IR theory more possible. It not only re-establishes a historically tenable foundation for the collective efforts towards a Chinese IR theory, but it also requests an epistemologically tenable foundation which is self-aware of the possible China egocentrism.
NOEMA Redshift Measurements of Extremely Bright Submillimeter Galaxies Near the GOODS-N
Creators: name: Jones, Logan H.
name: Rosenthal, Michael J.
name: Barger, Amy J.
name: Cowie, Lennox L.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We report spectroscopic redshift measurements for three bright submillimeter galaxies (SMGs) near the GOODS-N field, each with SCUBA-2 850 micron fluxes > 10 mJy, using the Northern Extended Millimeter Array (NOEMA). Our molecular linescan observations of these sources, which occupy a ~7 arcmin$^2$ area outside of the HST coverage of the field, reveal that two lie at $z \sim$ 3.14. In the remaining object, we detect line emission consistent with CO(7-6), [C I], and H2O at $z$ = 4.42. The far-infrared spectral energy distributions of these galaxies, constrained by SCUBA-2, NOEMA, and Herschel/SPIRE, indicate instantaneous SFRs $\sim4000 ~{\rm M_{\odot}~yr^{-1}}$ in the $z$ = 4.42 galaxy and $\sim 2500~{\rm M_{\odot}~yr^{-1}}$ in the two $z \sim$ 3.14 galaxies. Based on our sources' CO line luminosities, we estimate $M_{\rm gas}\sim10^{11} M_{\odot}$ and find gas depletion timescales of $τ_{\rm depl}\sim 50$ Myr, consistent with findings in other high-redshift SMGs. Finally, we show that the two $z \sim$ 3.14 sources, which alone occupy a volume $\sim$10 Mpc$^3$, very likely mark the location of a protocluster of bright SMGs and less dusty optical sources.
description: Newest version: 12 pages, 6 figures, 2 tables; added references and revised arguments in Section 4, results unchanged. Accepted to ApJ. First version: 8 pages, 3 figures, 2 tables. Submitted to ApJ Letters
Die orthodoxe Kirche und der Mensch in der bedrängten Welt von heute
Creators: name: Larentzakēs, Grēgorios
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 37 Nr. 1 (1988): Ökumenische Rundschau, Band 37, Heft 1
Spectral distribution for the decay tau -> nu_tau K pi
Creators: name: Jamin, M.
name: Pich, A.
name: Portoles, J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: With the newly available data sets on hadronic tau decays from the B-factories BABAR and BELLE, and future data from BESIII, precise information on the decay distributions will soon become available. This calls for an improvement of the decay spectra also on the theoretical side. In this work, the distribution function for the decay tau -> nu_tau K pi will be presented with the relevant K pi vector and scalar form factors being calculated in the framework of the resonance chiral theory, also taking into account additional constraints from dispersion relations and short-distances. As a by-product the slope and curvature of the vector form factor F_+^{K pi}(s) are determined to be lambda_+^' = 25.6 10^{-3} and lambda_+^{''} = 1.31 10^{-3} respectively. From our approach it appears that it should be possible to obtain information on the low lying scalar K_0^*(800) as well as the second vector K^*(1410) resonances from the tau decay data. In particular, the exclusive branching fraction of the scalar component is found to be B[tau -> nu_tau(K pi)_{S-wave}] = (3.88 +- 0.19) 10^{-4}.
description: 14 pages, 2 figures
Supplementary document for Designing metagratings with constant primary diffraction angles across variable refractive indices via particle swarm optimization - 7431006.pdf
Creators: name: Zhang, Baifu
name: Yuan, Ying
name: Luo, Yu
name: Cao, Xiaoyang
name: Li, Shangchen
name: Xu, Ji
name: Ding, Jianping
Publisher: name: Optica Publishing Group
Year: 2025
Subjects: Uncategorized

description: Supplemental Document
Contraction of matchgate tensor networks on non-planar graphs
Creators: name: Bravyi, Sergey
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A tensor network is a product of tensors associated with vertices of some graph $G$ such that every edge of $G$ represents a summation (contraction) over a matching pair of indexes. It was shown recently by Valiant, Cai, and Choudhary that tensor networks can be efficiently contracted on planar graphs if components of every tensor obey a system of quadratic equations known as matchgate identities. Such tensors are referred to as matchgate tensors. The present paper provides an alternative approach to contraction of matchgate tensor networks that easily extends to non-planar graphs. Specifically, it is shown that a matchgate tensor network on a graph $G$ of genus $g$ with $n$ vertices can be contracted in time $T=poly(n) + 2^{2g} O(m^3)$ where $m$ is the minimum number of edges one has to remove from $G$ in order to make it planar. Our approach makes use of anticommuting (Grassmann) variables and Gaussian integrals.
description: 32 pages, 7 figures
Galaxy halo masses and satellite fractions from galaxy-galaxy lensing in the SDSS: stellar mass, luminosity, morphology, and environment dependencies
Creators: name: Mandelbaum, Rachel
name: Seljak, Uros
name: Kauffmann, Guinevere
name: Hirata, Christopher M.
name: Brinkmann, Jonathan
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The relationship between galaxies and dark matter can be characterized by the halo mass of the central galaxy and the fraction of galaxies that are satellites. Here we present observational constraints from the SDSS on these quantities as a function of r-band luminosity and stellar mass using galaxy-galaxy weak lensing, with a total of 351,507 lenses. We use stellar masses derived from spectroscopy and virial halo masses derived from weak gravitational lensing to determine the efficiency with which baryons in the halo of the central galaxy have been converted into stars. We find that an L* galaxy with a stellar mass of 6x10^{10} M_{sun} is hosted by a halo with mass of 1.4x10^{12} M_{sun}/h, independent of morphology, yielding baryon conversion efficiencies of 17_{-5}^{+10} (early types) and 16_{-6}^{+15} (late types) per cent at the 95 per cent CL (statistical, not including systematic uncertainty due to assumption of a universal initial mass function, or IMF). We find that for a given stellar mass, the halo mass is independent of morphology below M_{stellar}=10^{11} M_{sun}, in contrast to typically a factor of two difference in halo mass between ellipticals and spirals at a fixed luminosity. This suggests that stellar mass is a good proxy for halo mass in this range and should be used preferentially whenever a halo mass selected sample is needed. For higher stellar masses, the conversion efficiency is a declining function of stellar mass, and the differences in halo mass between early and late types become larger, reflecting the fact that most group and cluster halos with masses above 10^{13} M_{sun} host ellipticals at the center, while even the brightest central spirals are hosted by halos of mass below 10^{13} M_{sun}. (Abridged)
description: 19 pages, matches MNRAS accepted version
Entangling Power of Permutations
Creators: name: Clarisse, Lieven
name: Ghosh, Sibasish
name: Severini, Simone
name: Sudbery, Anthony
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The notion of entangling power of unitary matrices was introduced by Zanardi, Zalka and Faoro [PRA, 62, 030301]. We study the entangling power of permutations, given in terms of a combinatorial formula. We show that the permutation matrices with zero entangling power are, up to local unitaries, the identity and the swap. We construct the permutations with the minimum nonzero entangling power for every dimension. With the use of orthogonal latin squares, we construct the permutations with the maximum entangling power for every dimension. Moreover, we show that the value obtained is maximum over all unitaries of the same dimension, with possible exception for 36. Our result enables us to construct generic examples of 4-qudits maximally entangled states for all dimensions except for 2 and 6. We numerically classify, according to their entangling power, the permutation matrices of dimension 4 and 9, and we give some estimates for higher dimensions.
description: 8 pages. We have deleted the appendix. We have pointed out that our result enables to construct generic examples of 4-qudits maximally entangled states for all dimensions except for 2 and 6. Accepted for publication in Phys. Rev. A
Coarse-grained conformational surface hopping: Methodology and transferability
Creators: name: Rudzinski, Joseph F.
name: Bereau, Tristan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Coarse-grained (CG) conformational surface hopping (SH) adapts the concept of multisurface dynamics, initially developed to describe electronic transitions in chemical reactions, to accurately describe classical molecular dynamics at a reduced level. The SH scheme couples distinct conformational basins (states), each described by its own force field (surface), resulting in a significant improvement of the approximation to the many-body potential of mean force [Phys. Rev. Lett. 121, 256002 (2018)]. The present study first describes CG SH in more detail, through both a toy model and a three-bead model of hexane. We further extend the methodology to non-bonded interactions and report its impact on liquid properties. Finally, we investigate the transferability of the surfaces to distinct systems and thermodynamic state points, through a simple tuning of the state probabilities. In particular, applications to variations in temperature and chemical composition show good agreement with reference atomistic calculations, introducing a promising "weak-transferability regime," where CG force fields can be shared across thermodynamic and chemical neighborhoods.
description: 15 pages, 7 figures
CLINICAL DESCRIPTION OF ADULT PATIENTS WITH ACQUIRED HEART DEFECTS
Creators: name: Xamdavmov, Baxtiyor
name: Axmedov, Nizom
Publisher: name: Zenodo
Year: 2024

description: All patients studied should be given a clinical description of these patients in order to assess the immune status, to conduct a comparative study of the indicators of the immune system. This study made it possible to obtain complete information on its condition at the time of assessment of the immune status of the object, specific features in the course of the disease, the basics of differential diagnostics on differentiation from one another, the results of laboratory and instrumental examinations, treatment tactics.
title: Definiowanie i rola wytycznych konserwatorskich w projektowaniu architektonicznym
Creators: name: Abramczyk, Magdalena
name: Korbel, Wojciech
Publisher: name: Publishing House of Poznan University of Technology
Year: 2023

description: Zeszyty Naukowe Politechniki Poznańskiej. Architektura, Urbanistyka, Architektura Wnętrz, 15, 9-22
First Principles Study of Work Functions of Single Wall Carbon Nanotubes
Creators: name: Shan, Bin
name: Cho, Kyeongjae
Publisher: name: arXiv
Year: 2005
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We performed first principles calculations on work functions of single wall carbon nanotubes (SWNTs), which can be divided into two classes according to tube diameter (D). For class I tubes (D > 1 nm), work functions lie within a narrow distribution (~0.1 eV) and show no significant chirality or diameter dependence. For class II tubes (D < 1 nm), work functions show substantial changes, with armchair tubes decrease monotonously with diameter, while zigzag tubes show opposite trend. Surface dipoles and hybridization effects are shown to be responsible for the observed work function change.
description: 10 pages, 4 figures, Phys. Rev. Lett.(to be published)
Failure of microcausality in quantum field theory on noncommutative spacetime
Creators: name: Greenberg, O. W.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The star commutator of $:ϕ(x) \star ϕ(x):$ with $:ϕ(y) \star ϕ(y):$ fails to vanish at equal times and thus also fails to obey microcausality at spacelike separation even for the case in which $θ^{0i}=0$. The failure to obey microcausality for this sample observable implies that this form of noncommutative field theory fails to obey microcausality in general. This result also holds for general fields and observables. We discuss possible responses to this problem.
description: 10 pages
Constraints on extended gravity models through gravitational wave emission
Creators: name: Lambiase, Gaetano
name: Sakellariadou, Mairi
name: Stabile, Antonio
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Using recent experimental results of detection of gravitational waves from the binary black hole signals by Advanced LIGO and Advanced Virgo, we investigate the propagation of gravitational waves in the context of fourth order gravity nonminimally coupled to a massive scalar field. Gravitational radiation admits extra massive modes of oscillation and we assume that the amplitude of these modes is comparable to that of the massless mode. We derive the propagation equation and effective mass for each degree of freedom and we infer, from the current observational data, constraints on the free parameters of the gravity models we considered. In particular, for $f(R)=R-R^2/R_0 $, the constraint obtained from the speed of gravitational waves is not compatible with the one set by Solar System tests, which implies that amplitude of the massive modes could not be detectable with current experiments on Earth
description: 11 pages, submitted to JCAP
Learning Efficient Representations for Keyword Spotting with Triplet Loss
Creators: name: Vygon, Roman
name: Mikhaylovskiy, Nikolay
Publisher: name: arXiv
Year: 2021
Subjects: subject: Audio and Speech Processing (eess.AS)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: In the past few years, triplet loss-based metric embeddings have become a de-facto standard for several important computer vision problems, most no-tably, person reidentification. On the other hand, in the area of speech recognition the metric embeddings generated by the triplet loss are rarely used even for classification problems. We fill this gap showing that a combination of two representation learning techniques: a triplet loss-based embedding and a variant of kNN for classification instead of cross-entropy loss significantly (by 26% to 38%) improves the classification accuracy for convolutional networks on a LibriSpeech-derived LibriWords datasets. To do so, we propose a novel phonetic similarity based triplet mining approach. We also improve the current best published SOTA for Google Speech Commands dataset V1 10+2 -class classification by about 34%, achieving 98.55% accuracy, V2 10+2-class classification by about 20%, achieving 98.37% accuracy, and V2 35-class classification by over 50%, achieving 97.0% accuracy.
description: Submitted to SPECOM 2021
Spitzer Observations of Optically "Invisible" Radio and X-Ray Sources: High Redshift AGN
Creators: name: Higdon, J. L.
name: Higdon, S. J. U.
name: Weedman, D. W.
name: Houck, J. R.
name: Floc'h, E. Le
name: Brown, M. J. I.
name: Dey, A.
name: Jannuzi, B. T.
name: Soifer, B. T.
name: Rieke, M. J.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have combined a survey at 24 microns to 0.3 mJy with the Multiband Imaging Photometer (MIPS) on the Spitzer Space Telescope, a 20 cm A-array VLA survey covering 0.5 deg^2, and an existing 172 ks Chandra X-Ray Observatory exposure to investigate the nature of optically faint radio and X-ray sources in the NOAO Deep Wide-Field Survey (NDWFS) in Bootes. We find little overlap between the radio and infrared selected populations: only 9% of the infrared sources are detected in the radio and only 33% of the radio sources are detected in the infrared. Thirty-six (10%) of the 377 compact radio sources lack optical counterparts in the NDWFS Bw, R, & I images. We refer to these objects as optically invisible radio sources (OIRS). Only four of the thirty-one OIRSs observed with MIPS are detected at 24 microns. Comparisons of the radio and infrared properties of the OIRSs with various galaxy spectral energy distributions demonstrate that most of these sources are powered by AGN rather than starbursts. Similarly, eleven X-ray sources observed by both MIPS and the VLA are classified as optically invisible X-ray sources (OIXS). None are detected at 24 microns or 20 cm. All seven OIXSs detected in Chandra's 0.5-2 keV band have infrared to X-ray flux ratios consistent with their luminosity being dominated by an unobscured AGN. From these results we conclude that both the optically invisible radio and X-ray source populations are primarily AGN, relatively unaffected by dust and most likely at z > 1. No OIRSs are detected in X-ray emission and no OIXSs are detected at 20 cm. However, given the wide range in radio and X-ray properties of known AGN and the size of our samples, this lack of overlap does not necessarily imply AGN source populations.
description: 20 pages, 8 figures. accepted by the Astrophysical Journal
Defining and controlling double quantum dots in single-walled carbon nanotubes
Creators: name: Graeber, M. R.
name: Weiss, M.
name: Schoenenberger, C.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We report the experimental realization of double quantum dots in single-walled carbon nanotubes. The device consists of a nanotube with source and drain contact, and three additional top-gate electrodes in between. We show that, by energizing these top-gates, it is possible to locally gate a nanotube, to create a barrier, or to tune the chemical potential of a part of the nanotube. At low temperatures we find (for three different devices) that in certain ranges of top-gate voltages our device acts as a double quantum dot, evidenced by the typical honeycomb charge stability pattern.
description: 9 pages, 3 figures
Improved Intranuclear Cascade Models for the Codes CEM2k and LAQGSM
Creators: name: Mashnik, S. G.
name: Gudima, K. K.
name: Sierk, A. J.
name: Prael, R. E.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Nuclear Theory (nucl-th)
subject: Astrophysics (astro-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: An improved version of the Cascade-Exciton Model (CEM) of nuclear reactions implemented in the codes CEM2k and the Los Alamos version of the Quark-Gluon String Model (LAQGSM) has been developed recently at LANL to describe reactions induced by particles and nuclei at energies up to hundreds of GeV/nucleon for a number of applications. We present several improvements to the intranuclear cascade models used in CEM2k and LAQGSM developed recently to better describe the physics of nuclear reactions. First, we incorporate the photonuclear mode from CEM2k into LAQGSM to allow it to describe photonuclear reactions, not previously modeled there. Then, we develop new approximations to describe more accurately experimental elementary energy and angular distributions of secondary particles from hadron-hadron and photon-hadron interactions using available data and approximations published by other authors. Finally, to consider reactions involving very highly excited nuclei (E* > 2-3 MeV/A), we have incorporated into CEM2k and LAQGSM the Statistical Multifragmentation Model (SMM), as a possible reaction mechanism occurring after the preequilibrium stage. A number of other refinements to our codes developed recently are also listed.
description: 5 pages, pdf, 6 figures, to be published in Proc. Int. Conf. on Nuclear Data for Science & Technology (ND2004), Santa Fe, USA, Sept. 26 - Oct. 1, 2004
第三届德语区高校汉学/中国学专业 现代汉语教学研讨会总结
Creators: name: CUI, Peiling
Publisher: name: CHUN - Chinesisch-Unterricht
Year: 2024

description: CHUN - Chinesisch-Unterricht, Bd. 36 (2021): CHUN - Chinesischunterricht
title: Von C2 über kinetisch stabilisierte Ditetreline zu Polyguanidinen
title: From C2 to kinetically stabilised ditetrels to polyguanidines. Quantum chemicalinvestigations to bonding situations and reactivity.
Creators: name: Hermann, Markus Rainer
Publisher: name: Philipps-Universität Marburg
Year: 2015
Subjects: Chemistry and allied sciences
Chemie
Reaktivität
EDA
Ditetreline
Polymere, Ditetreline
ditetrels
C2
Polymere
bonding situation
reactivity
Bindungsbeschreibung, Reaktivität
C2, Bindungsbeschreibung

description: In der vorliegenden Arbeit kamen
      verschiedene quantenchemische Methoden zur Analyse von
      Bindungssituationen und Reaktionen zur Anwendung. Für kleine
      Moleküle wie C2 und Ethin wurden neuste hochgenaue ab-initio
      Methoden verwendet. Dadurch ist es möglich, verlässliche
      Aussagen über Abstände und Energien in diesen Molekülen
      gewinnen und die Bindungssituation in C2 zu verstehen. Bei
      den Ditetrelinen und Polyguanidinen wurde
      Dichtefunktionaltheorie verwendet, wobei je nach
      Einsatzbereich GGA- oder Meta-GGA-Funktionale genutzt wurden.
      Bei der Untersuchung der Ditetreline wurden mit der Hilfe der
      EDA-NOCV die Einflüße von Liganden und Zentralatome auf die
      Bindungssituation untersucht. Diese Ergebnisse können helfen,
      Ditetreline mit spezifischen Eigenschaften und Reaktivitäten
      zu synthetisieren. Die Ergebnisse der quantenchemischen
      Berechnungen von Polyguanidinen zeigen die gute
      Übereinstimmung von theoretischen Berechnungen und dem
      Experiment und können einen Ansatzpunkte für die Synthese von
      Polyguanidinen mit Heterozyklen in der Wiederholungseinheit
      bilden.
description: In this dissertation several
      quantum mechanical methods for the analysis of bonding
      situations and reactions were used. For small molecules like
      C2 and acetylene state of the art quantum chemical ab-initio
      methods were applied. With that it is possible to gain
      reliable results for distances and energies and to understand
      the bonding situation in C2. For the ditetrelynes and
      polyguanidines density functional theory was used. Depending
      on the application GGA- or meta-GGA functionals were applied.
      For the investigation of the ditetrelynes EDA-NOCV was used
      to shed light on the influences of ligands and group-14 atom
      on the bonding situation. These results may help to
      synthesize ditetrelynes with specific properties and
      reactivity. Quantum chemical studies of polyguanidines show
      good agreement with experiment and can be a starting point
      for further developments on the fields of polyguanidines with
      cyclic repeating units.
Dynamical Expansion of Ionization and Dissociation Front around a Massive Star. II. On the Generality of Triggered Star Formation
Creators: name: Hosokawa, Takashi
name: Inutsuka, Shu-ichiro
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We analyze the dynamical expansion of the HII region, photodissociation region, and the swept-up shell, solving the UV- and FUV-radiative transfer, the thermal and chemical processes in the time-dependent hydrodynamics code. Following our previous paper, we investigate the time evolutions with various ambient number densities and central stars. Our calculations show that basic evolution is qualitatively similar among our models with different parameters. The molecular gas is finally accumulated in the shell, and the gravitational fragmentation of the shell is generally expected. The quantitative differences among models are well understood with analytic scaling relations. The detailed physical and chemical structure of the shell is mainly determined by the incident FUV flux and the column density of the shell, which also follow the scaling relations. The time of shell-fragmentation, and the mass of the gathered molecular gas are sensitive tothe ambient number density. In the case of the lower number density, the shell-fragmentation occurs over a longer timescale, and the accumulated molecular gas is more massive. The variations with different central stars are more moderate. The time of the shell-fragmentation differs by a factor of several with the various stars of M_* = 12-101 M_sun. According to our numerical results, we conclude that the expanding HII region should be an efficient trigger for star formation in molecular clouds if the mass of the ambient molecular material is large enough.
description: 49 pages, including 17 figures ; Accepted for publication in ApJ
E_7(7) on the Light Cone
Creators: name: Brink, Lars
name: Kim, Sung-Soo
name: Ramond, Pierre
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We use the Cremmer-Julia E_7(7) non-linear symmetry of N=8 Supergravity to derive its order $κ^2$ on-shell Hamiltonian in terms of one chiral light-cone superfield. By requiring that E_7(7) commute with the super-Poincare group, we deduce to lowest non-trivial order in $κ$, the light cone E_7(7) transformations of all fields of the theory, including the graviton. We then derive the dynamical supersymmetry transformation to order $κ^2$, and express the Hamiltonian as a quadratic form in the chiral superfield.
description: 21 pages, v2. the order-\kappa^2 form of the dynamical supersymmetry transformation corrected. v3. references and a few comments added, version to appear in JHEP
Tagungsbericht der „3. Arbeitstagung zur Chinesischausbildung im Rahmen von chinabezogenen BA-/MAStudiengängen im deutschsprachigen Raum“
Creators: name: CUI, Peiling
name: Ritter, Milena
Publisher: name: CHUN – Chinesischunterricht
Year: 2024

description: CHUN – Chinesischunterricht, Bd. 36 (2021): CHUN - Chinesischunterricht
Dependence of great geomagnetic storm intensity ($Δ$SYM-H$\le$-200 nT) on associated solar wind parameters
Creators: name: Zhao, Ming-Xian
name: Le, Gui-Ming
name: Li, Qi
name: Liu, Gui-Ang
name: Mao, Tian
Publisher: name: arXiv
Year: 2020
Subjects: subject: Space Physics (physics.space-ph)
subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: We use $Δ$SYM-H to capture the variation in the SYM-H index during the main phase of a geomagnetic storm. We define great geomagnetic storms as those with $Δ$SYM-H $\le$ -200 nT. After analyzing the data that were not obscured by solar winds, we determined that 11 such storms occurred during solar cycle 23. We calculated time integrals for the southward interplanetary magnetic field component I(B$_s$), the solar wind electric field I(E$_y$), and a combination of E$_y$ and the solar wind dynamic pressure I(Q) during the main phase of a great geomagnetic storm. The strength of the correlation coefficient (CC) between $Δ$SYM-H and each of the three integrals I(B$_s$) (CC = 0.74), I(E$_y$) (CC = 0.85), and I(Q) (CC = 0.94) suggests that Q, which encompasses both the solar wind electric field and the solar wind dynamic pressure, is the main driving factor that determines the intensity of a great geomagnetic storm. The results also suggest that the impact of B$_s$ on the great geomagnetic storm intensity is much more significant than that of the solar wind speed and the dynamic pressure during the main phase of associated great geomagnetic storm. How to estimate the intensity of an extreme geomagnetic storm based on solar wind parameters is also discussed.
description: 3 figures
Chinesisch-Ausspracheunterricht im Distanzmodus
Creators: name: Renner, Julia
name: Lobner, David
Publisher: name: CHUN – Chinesischunterricht
Year: 2024

description: Der folgende Beitrag setzt sich mit dem Ausspracheunterricht im ersten Studienjahr an der Wiener Sinologie auseinander, der im Wintersemester 2020/21 coronabedingt per Video-Chat stattfinden musste. Der Fokus liegt dabei auf der Umsetzung des Perzeptionstrainings, das im Wesentlichen mittels Pinyin-Diktate erfolgt. Der Beitrag stützt sich einerseits auf eine Fehleranalyse von Pinyin-Diktaten (durchgeführt im synchronen Audio- und Videomodus), andererseits auf eine ergänzende Online-Befragung der Studierenden. Die Ergebnisse zeigen, dass die Perzeption von Anlauten (insbesondere nichtaspirierte) des Mandarin-Chinesischen in der mündlichen, computervermittelten Kommunikation speziell störungsanfällig ist, wobei die Lernenden die Sichtbarkeit von Mund- und Lippenbewegungen, anders als erwartet, größtenteils nicht als deutliche Erleichterung empfinden. Auf Basis der Ergebnisse werden unterschiedliche Pinyin-Diktat-Varianten und ihre jeweiligen Vor- und Nachteile aufgezeigt.
description: CHUN – Chinesischunterricht, Bd. 36 (2021): CHUN - Chinesischunterricht
A High Efficiency Ultra High Vacuum Compatible Flat Field Spectrometer for EUV Wavelengths
Creators: name: Blagojevic, B.
name: Bigot, Eric-Olivier Le
name: Fahy, K.
name: Aguilar, A.
name: Makonyi, K.
name: Takács, E.
name: Tan, J. N.
name: Pomeroy, J. M.
name: Burnett, J. H.
name: Gillaspy, J. D.
name: Roberts, J. R.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Instrumentation and Detectors (physics.ins-det)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A custom, flat field, extreme ultraviolet EUV spectrometer built specifically for use with low power light sources that operate under ultrahigh vacuum conditions is reported. The spectral range of the spectrometer extends from 4 nm to 40 nm. The instrument optimizes the light gathering power and signal to noise ratio while achieving good resolution. A detailed description of the spectrometer and design considerations are presented, as well as a novel procedure that could be used to obtain a synthetic wavelength calibration with the aid of only a single known spectral feature. This synthetic wavelength calibration is compared to a standard wavelength calibration obtained from previously reported spectral lines of Xe, Ar and Ne ions recorded with this spectrometer.
Local Perception and Learning Mechanisms in Resource-Consumer Dynamics
Creators: Shi, Qingyan
Song, Yongli
Wang, Hao
Publisher: name: University of Alberta Library
Year: 2024

Abstract

taken from the article

Spatial memory is key in animal movement modeling, but it has been challenging to explicitly model learning to describe memory acquisition. In this paper, we study novel cognitive consumer-resource models with different consumer learning mechanisms and investigate their dynamics. These models consist of two PDEs in composition with one ODE such that the spectrum of the corresponding linearized operator at a constant steady state is unclear. We describe the spectra of the linearized operators and analyze the eigenvalue problems to determine the stability of the constant steady states. We then perform bifurcation analysis by taking the perceptual diffusion rate as the bifurcation parameter. It is found that steady-state and Hopf bifurcations can both occur in these systems, and the bifurcation points are given so that the stability region can be determined. Moreover, rich spatial and spatiotemporal patterns can be generated in such systems via different types of bifurcation. Our effort establishes a new approach to tackling a hybrid model of PDE-ODE composition and provides a deeper understanding of cognitive movement-driven consumer-resource dynamics.
The LeClair-Mussardo series and nested Bethe Ansatz
Creators: name: Hutsalyuk, Arthur
name: Pozsgay, Balázs
name: Pristyák, Levente
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: We consider correlation functions in one dimensional quantum integrable models related to the algebra symmetries $\mathfrak{gl}(2|1)$ and $\mathfrak{gl}(3)$. Using the algebraic Bethe Ansatz approach we develop an expansion theorem, which leads to an infinite integral series in the thermodynamic limit. The series is the generalization of the LeClair-Mussardo series to nested Bethe Ansatz systems, and it is applicable both to one-point and two-point functions. As an example we consider the ground state density-density correlator in the Gaudin-Yang model of spin-1/2 Fermi particles. Explicit formulas are presented in a special large coupling and large imbalance limit.
description: 39 pages, v2: minor changes
Coronakrise als Chance für die Digitalisierung des schulischen Chinesischunterrichts
Creators: name: Wittek, Kathleen
Publisher: name: CHUN – Chinesischunterricht
Year: 2024

description: Im vorliegenden Artikel werden Möglichkeiten des digitalen Lernens im Fach Chinesisch beschrieben, ausgehend vom SAMR-Modell bewertet und auf ihren Nutzen nach der Pandemie untersucht. Die Verfasserin legt ausgehend von ihren eigenen Unterrichtserfahrungen während der pandemiebedingten Schulschließungen und des Unterrichts im Hybridszenario an ausgewählten Beispielen die Chancen dar, die die Digitalisierung des Unterrichts auch über die Zwänge einer Pandemie hinaus für guten Unterricht bietet.
description: CHUN – Chinesischunterricht, Bd. 36 (2021): CHUN - Chinesischunterricht
Microsphere kinematics from the polarization of tightly focused nonseparable light
Creators: name: Berg-Johansen, Stefan
name: Neugebauer, Martin
name: Aiello, Andrea
name: Leuchs, Gerd
name: Banzer, Peter
name: Marquardt, Christoph
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Recently, it was shown that vector beams can be utilized for fast kinematic sensing via measurements of their global polarization state [Optica 2(10), 864 (2015)]. The method relies on correlations between the spatial and polarization degrees of freedom of the illuminating field which result from its nonseparable mode structure. Here, we extend the method to the nonparaxial regime. We study experimentally and theoretically the far-field polarization state generated by the scattering of a dielectric microsphere in a tightly focused vector beam as a function of the particle position. Using polarization measurements only, we demonstrate position sensing of a Mie particle in three dimensions. Our work extends the concept of back focal plane interferometry and highlights the potential of polarization analysis in optical tweezers employing structured light.
description: 10 pages, 11 figures
Elemente des klassischen Chinesisch in aktuellen Medien, Kochfernsehshows und Dating-Apps
Creators: name: Akimov, Yaroslav
Publisher: name: CHUN – Chinesischunterricht
Year: 2024

description: Der vorliegende Beitrag bietet eine Übersicht über die Ziele, den Aufbau und die Übungsformen eines experimentellen Sprachkurses für die Masterstudierenden an der Freien Universität Berlin, der darauf abzielt, den Ausdruck in moderner chinesischer Schriftsprache Shumianyu zu verbessern. Obwohl Shumianyu sich vom klassischen Chinesisch Wenyanwen unterscheidet und ein eigenes System bildet, weist es eine wesentliche Reihe von Wenyanismen (lexikalische Elemente, grammatische Konstruktionen, stilistische Merkmale) auf, die das Verständnis schriftlicher Texte sogar für die fortgeschrittenen Lernenden deutlich erschwert. Der Ansatz „Alte Sprache heute benutzen“ 古 语今用 Gǔ yǔ jīn yòng wird gründlich überdacht: Im Gegensatz zu Kursen für Vormodernes Chinesisch mit Kommentaren über die modernen Implikationen der gelernten alten Sprachformen wird hier für bestimmte Zwecke und Zielgruppen ein auf modernes Chinesisch orientiertes Unterrichtskonzept vorgeschlagen, das im Unterricht des modernen Chinesisch ein stärkeres Bewusstsein für die klassischen „Wurzeln“ von Shumianyu schaffen soll.
description: CHUN – Chinesischunterricht, Bd. 36 (2021): CHUN - Chinesischunterricht
Überlegungen zur Didaktik der klassischen chinesischen Schriftsprache
Creators: name: Schmid, Jonas
Publisher: name: CHUN – Chinesischunterricht
Year: 2024

description: In den meisten deutschsprachigen Sinologie-Bachelorstudiengängen sind Kurse im klassischen Chinesisch verpflichtend. Dieser Beitrag1 gibt ausgehend von einer Umfrage unter Bachelorstudierenden einen ersten kursorischen Überblick über den Status quo des Unterrichts der klassischen Schriftsprache an sinologischen Instituten im deutschsprachigen Raum. Meist liegt der Schwerpunkt des Unterrichts auf der Ausbildung der Lese- und Übersetzungskompetenz alter chinesischer Texte. Ausgehend von Beiträgen der chinesischen Fremdsprachendidaktik zeigt dieser Beitrag, wie darüber hinaus auch der Lernprozess des modernen Chinesisch (insbesondere der Schriftsprache) im Unterricht des klassischen Chinesisch gefördert werden kann. An den Aspekten Auswahl und Darstellung der Lektionstexte, Grammatik, Wortschatz und Vokabeln sowie Übungsformen wird dies erläutert und abschließend am Beispiel eines chinesischen Lehrwerkes vorgestellt.
description: CHUN – Chinesischunterricht, Bd. 36 (2021): CHUN - Chinesischunterricht
Physics in the Real Universe: Time and Spacetime
Creators: name: Ellis, George F. R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The Block Universe idea, representing spacetime as a fixed whole, suggests the flow of time is an illusion: the entire universe just is, with no special meaning attached to the present time. This view is however based on time-reversible microphysical laws and does not represent macro-physical behaviour and the development of emergent complex systems, including life, which do indeed exist in the real universe. When these are taken into account, the unchanging block universe view of spacetime is best replaced by an evolving block universe which extends as time evolves, with the potential of the future continually becoming the certainty of the past. However this time evolution is not related to any preferred surfaces in spacetime; rather it is associated with the evolution of proper time along families of world lines
description: 28 pages, including 9 Figures. Major revision in response to referee comments