cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Spatial-Temporal Hypergraph Self-Supervised Learning for Crime Prediction
Creators: name: Li, Zhonghang
name: Huang, Chao
name: Xia, Lianghao
name: Xu, Yong
name: Pei, Jian
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences

description: Crime has become a major concern in many cities, which calls for the rising demand for timely predicting citywide crime occurrence. Accurate crime prediction results are vital for the beforehand decision-making of government to alleviate the increasing concern about the public safety. While many efforts have been devoted to proposing various spatial-temporal forecasting techniques to explore dependence across locations and time periods, most of them follow a supervised learning manner, which limits their spatial-temporal representation ability on sparse crime data. Inspired by the recent success in self-supervised learning, this work proposes a Spatial-Temporal Hypergraph Self-Supervised Learning framework (ST-HSL) to tackle the label scarcity issue in crime prediction. Specifically, we propose the cross-region hypergraph structure learning to encode region-wise crime dependency under the entire urban space. Furthermore, we design the dual-stage self-supervised learning paradigm, to not only jointly capture local- and global-level spatial-temporal crime patterns, but also supplement the sparse crime representation by augmenting region self-discrimination. We perform extensive experiments on two real-life crime datasets. Evaluation results show that our ST-HSL significantly outperforms state-of-the-art baselines. Further analysis provides insights into the superiority of our ST-HSL method in the representation of spatial-temporal crime patterns. The implementation code is available at https://github.com/LZH-YS1998/STHSL.
description: This paper has been published as a full paper at ICDE 2022
Gender-Specific Investigation into the Problem of High School Dropouts in the Amhara Region
Creators: name: Kassahun, Tilaye
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 1997

description: The purpose of this study was to investigate the problem of high school dropouts in the Amhara Region. The investigation was mainly concerned with determining the magnitude of the dropout rates among sexes and grades, dropping out, and the possible effects of dropping out of school. To this end, the study was conducted by using a fairly comprehensive strategy know as descriptive survey. Apart from consultation of documents from relevant sources, 254 high school dropouts and 27 school personnel respondents were drawn by applying diversified sampling techniques to fill the questionnaires prepared for them.The data obtained were analysed by using Various statistical mechanisms
Results and performance of the Mini-EUSO telescope on board the ISS
Creators: name: Marcelli, Laura
Publisher: name: arXiv
Year: 2023
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Mini-EUSO is a telescope observing the Earth in the ultraviolet band (290-430 nm) since 2019, through a nadir-facing UV-transparent window in the Russian Zvezda module of the International Space Station. The main camera has an optical system composed of two 25 cm diameter Fresnel lenses and a focal surface consisting of 36 multi-anode photomultiplier tubes, 64 pixels each, for a total of 2304 channels. The instrument has a square field of view with a side of 44 degrees, a spatial resolution of about 6.3 km on the Earth surface and a sampling time of 2.5 microseconds. Mini- EUSO has also two cameras in the near infrared and visible ranges and silicon photomultiplier sensors to complement the UV observations. Mini-EUSO has been designed as a small-size version of the original JEM-EUSO space telescope to demonstrate its observational principle. Mini-EUSO is in fact potentially capable of observing extensive air showers generated by ultra-high-energy cosmic rays with an energy above 10 21 eV and of detecting artificial showers generated with lasers from the ground. Other main scientific objectives of the mission are the study of atmospheric phenomena (transient luminous events such as ELVES and sprites), the observation of meteors and among them the search for interstellar meteors and nuclearites such as strange quark matter. Moreover, Mini-EUSO can map night-time UV Earth emissions, both anthropogenic and natural. In this work, we will discuss results and performance of the telescope during its first four years of activity.
description: 18 pages, 10 figures, ICRC2023
Performance assessment of a tightly baffled, long-legged divertor configuration in TCV with SOLPS-ITER
Creators: name: Sun, G.
name: Reimerdes, H.
name: Theiler, C.
name: Duval, B. P.
name: Carpita, M.
name: Colandrea, C.
name: Février, O.
name: team, the TCV
Publisher: name: arXiv
Year: 2023
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Numerical simulations explore the possibility to test the tightly baffled, long-legged divertor (TBLLD) concept in a future upgrade of the Tokamak à configuration variable (TCV). The SOLPS-ITER code package is used to compare the exhaust performance of several TBLLD configurations with existing unbaffled and baffled TCV configurations. The TBLLDs feature a range of radial gaps between the separatrix and the outer leg side walls. All considered TBLLDs are predicted to lead to a denser and colder plasma in front of the targets and improve the power handling by factors of 2-3 compared to the present, baffled divertor and by up to a factor of 12 compared to the original, unbaffled configuration. The improved TBLLD performance is mainly due to a better neutral confinement with improved plasma-neutral interactions in the divertor region. Both power handling capability and neutral confinement increases when reducing the radial gap. The core compatibility of TBLLDs with nitrogen seeding is also evaluated and the detachment window with acceptable core pollution for the proposed TBLLDs is explored, showing a reduction of required upstream impurity concentration up to 18% to achieve the detachment with thinner radial gap.
Jürgens, Kerstin: Arbeits- und Lebenskraft. Reproduktion als eigensinnige Grenzziehung. Wiesaden: VS Verlag für Sozialwissenschaften, 2006, ISBN 3-531-151-72-X, 312 Seiten, Euro 39,90
Creators: name: Peter, Gerd
Publisher: name: Lucius & Lucius Verlagsgesellschft GmbH
Year: 2009
Subjects: subject: 300
subject: 650

description: Arbeit
Suppression of Quasiperiodicity in Circle Maps with Quenched Disorder
Creators: name: Müller-Bender, David
name: Kastner, Johann Luca
name: Radons, Günter
Publisher: name: arXiv
Year: 2022
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Dynamical Systems (math.DS)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 37E10, 37H15, 82C44

description: We show that introducing quenched disorder into a circle map leads to the suppression of quasiperiodic behavior in the limit of large system sizes. Specifically, for most parameters the fraction of disorder realizations showing quasiperiodicity decreases with the system size and eventually vanishes in the limit of infinite size, where almost all realizations show mode-locking. Consequently, in this limit, and in strong contrast to standard circle maps, almost the whole parameter space corresponding to invertible dynamics consists of Arnold tongues.
description: 7 pages, 4 figures; minor changes due to review process
Mapping the Structure of Directed Networks: Beyond the "Bow-tie" Diagram
Creators: name: Timár, G.
name: Goltsev, A. V.
name: Dorogovtsev, S. N.
name: Mendes, J. F. F.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: We reveal a hierarchical, multilayer organization of finite components -- i.e., tendrils and tubes -- around the giant connected components in directed networks and propose efficient algorithms allowing one to uncover the entire organization of key real-world directed networks, such as the World Wide Web, the neural network of \emph{Caenorhabditis elegans}, and others. With increasing damage, the giant components decrease in size while the number and size of tendril layers increase, enhancing the susceptibility of the networks to damage.
description: 5 pages, 4 figures
The Chiral Ring of a Symmetric Orbifold and its Large N Limit
Creators: name: Ashok, Sujay K.
name: Troost, Jan
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We analyze the chiral operator ring of the symmetric orbifold conformal field theory on the complex two-plane. We compute the large N limit of the ring and exhibit its factorized leading order behaviour. We moreover calculate all structure constants at the subleading and sub-subleading order. These features are coded as properties of the symmetric group and we review the relevant mathematical theorems on the product of conjugacy classes in the center of the group algebra. We illustrate the efficiency of the formalism by iteratively computing broad classes of higher point extremal correlators. We point out generalizations of our simplest of models and argue that our combinatorial analysis is relevant to the organization of the large N perturbation theory of generic symmetric orbifolds.
description: 33 pages, 8 figures
Helmut Brentel, Herbert Klemisch, holger Rohn (Hg.): Lernendes Unternehmen. Konzepte und Instrumente für eine zukunftsfähige Unternehmes- und Organisationsentwicklung, Wiesbaden: Westdeutscher Verlag, 2003, ISBN 3-531-13677-1, 301 S., Euro 27,90
Creators: name: Meier, Stefan
Publisher: name: Lucius & Lucius Verlagsgesellschaft
Year: 2004
Subjects: subject: 300
subject: 650

description: Arbeit
A centrality measure for quantifying spread on weighted, directed networks
Creators: name: Fink, Christian G.
name: Fullin, Kelly
name: Gutierrez, Guillermo
name: Omodt, Nathan
name: Zinnecker, Sydney
name: Sprint, Gina
name: McCulloch, Sean
Publisher: name: arXiv
Year: 2023
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Social and Information Networks (cs.SI)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: While many centrality measures for complex networks have been proposed, relatively few have been developed specifically for weighted, directed (WD) networks. Here we propose a centrality measure for spread (of information, pathogens, etc.) through WD networks based on the independent cascade model (ICM). While deriving exact results for the ICM requires Monte Carlo simulations, we show that our centrality measure (Viral Centrality) provides excellent approximation to ICM results for networks in which the weighted strength of cycles is not too large. We show this can be quantified with the leading eigenvalue of the weighted adjacency matrix, and we show that Viral Centrality outperforms other common centrality measures in both simulated and empirical WD networks.
description: 3 figures
Galactic rotation in Gaia DR1
Creators: name: Bovy, Jo
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The spatial variations of the velocity field of local stars provide direct evidence of Galactic differential rotation. The local divergence, shear, and vorticity of the velocity field---the traditional Oort constants---can be measured based purely on astrometric measurements and in particular depend linearly on proper motion and parallax. I use data for 304,267 main-sequence stars from the Gaia DR1 Tycho-Gaia Astrometric Solution to perform a local, precise measurement of the Oort constants at a typical heliocentric distance of 230 pc. The pattern of proper motions for these stars clearly displays the expected effects from differential rotation. I measure the Oort constants to be: A = 15.3+/-0.4 km/s/kpc, B = -11.9+/-0.4 km/s/kpc, C = -3.2+/-0.4 km/s/kpc and K = -3.3+/-0.6 km/s/kpc, with no color trend over a wide range of stellar populations. These first confident measurements of C and K clearly demonstrate the importance of non-axisymmetry for the velocity field of local stars and they provide strong constraints on non-axisymmetric models of the Milky Way.
description: MNRAS Letters, in press; code available at https://gist.github.com/jobovy/b002421ca865c93991f08f0eda4e72de
Deviation from Tribimaximal mixing using $A_{4}$ flavour model with five extra scalars
Creators: name: Puyam, Victoria
name: Singh, S. Robertson
name: Singh, N. Nimai
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A modified neutrino mass model with five extra scalars is constructed using $A_{4}$ discrete symmetry group. The resultant mass matrix is able to give necessary deviation from Tribimaximal mixing which reproduces the current neutrino masses and mixing data with good accuracy. The model gives testable prediction for the future measurements of the neutrinoless double-beta decay parameter $|m_{ββ}|$. The analysis is consistent with latest cosmological bound $Σm_{i}\leq$ 0.12 eV.
description: 18 pages, 40 figures
The bimetric model with an informational metric tensor
Creators: name: Gogberashvili, Merab
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider a hybrid bimetric model where, in addition to the ordinary metric tensor that determines geometry, an informational metric is introduced to describe the reference frame of an observer. We note that the local information metric being Minkowskian explains one of the key aspects of the Einstein equivalence principle. Our approach has the potential to justify the three-dimensional nature of physical space and address the gravitational energy puzzle. Furthermore, it appears to be free of ghost instabilities in the matter sector, as the second metric tensor couples exclusively to the observer and is non-dynamical.
description: 7 pages, no figures
Effects of Internal Marketing on Organizational Commitment of Employees: The Case of Awash Bank
Creators: name: Adere, Naol
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2019

description: The purpose of this study is to assess the effects of internal marketing on organizational commitment of employees in Awash Bank Northern and Western districts of Addis Ababa. Some of the scholars come up with a lot of factors of internal marketing that could have impact on organizational commitment such as motivation, communication, training and job satisfaction. For the sake of achieving the objectives of the study both explanatory and descriptive research were used. The research was conducted through mixed research approach that means both quantitative and qualitative research approaches were used. The quantitative data was collected through using both primary and secondary source of data. The sample techniques employed was simple random sampling techniques. The information used for the study was gathered through self administered questionnaire from a sample of 105 employees of Awash Bank Northern and Western districts of Addis Ababa. The researcher used questionnaires to collect primary data and relevant documents to collect secondary data from the data sources. The data was collected by distributing the questionnaire and analyzed by statistical analysis of both descriptive analysis and inferential statistical analysis such as correlation and multiple regression analysis. The study results revealed that from the internal marketing dimensions constructed have a significant and positive effect on the commitment of employees to the organization. Based up on the findings the researcher recommended the bank needs to give emphasis on practicing internal marketing in order to enhance employee commitment.
DEMNUni: The imprint of massive neutrinos on the cross-correlation between cosmic voids and CMB lensing
Creators: name: Vielzeuf, Pauline
name: Calabrese, Matteo
name: Carbone, Carmelita
name: Fabbian, Giulio
name: Baccigalupi, Carlo
Publisher: name: arXiv
Year: 2023
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Cosmic voids are a powerful probe of cosmology and are one of the core observables of upcoming galaxy surveys. The cross-correlations between voids and other large-scale structure tracers such as galaxy clustering and galaxy lensing have been shown to be very sensitive probes of cosmology and among the most promising to probe the nature of gravity and the neutrino mass. However, recent measurements of the void imprint on the lensed Cosmic Microwave Background (CMB) have been shown to be in tension with expectations based on LCDM simulations, hinting to a possibility of non-standard cosmological signatures due to massive neutrinos. In this work we use the DEMNUni cosmological simulations with massive neutrino cosmologies to study the neutrino impact on voids selected in photometric surveys, e.g. via Luminous Red Galaxies, as well as on the void- CMB lensing cross-correlation. We show how the void properties observed in this way (size function, profiles) are affected by the presence of massive neutrinos compared to the neutrino massless case, and show how these can vary as a function of the selection method of the void sample. We comment on the possibility for massive neutrinos to be the source of the aforementioned tension. Finally, we identify the most promising setup to detect signatures of massive neutrinos in the voids-CMB lensing cross-correlation and define a new quantity useful to distinguish among different neutrino masses by comparing future observations against predictions from simulations including massive neutrinos.
description: 34 pages, 15 figures
Erhard Tietel: Emotion und Anerkennung in Organisationen. Wege zu einer traingulären Organisationskultur, Arbeitsgestaltung - Technikbewertung - Zukunft, Band 14, Münster/Hamburg/London: LIT Verlag, 2003, ISBN 3-8258-6661-0, iv u. 288 S., Euro 25,80
Creators: name: Eberwein, Wilhelm
Publisher: name: Lucius & Lucius Verlagsgesellschaft
Year: 2004
Subjects: subject: 300
subject: 650

description: Arbeit
Three relativistic neutrons in a finite volume
Creators: name: Draper, Zachary T.
name: Hansen, Maxwell T.
name: Romero-López, Fernando
name: Sharpe, Stephen R.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We generalize the relativistic field-theoretic (RFT) three-particle finite-volume formalism to systems of three identical, massive, spin-$1/2$ fermions, such as three neutrons. This allows, in principle, for the determination of the three-neutron interaction from the finite-volume spectrum of three-neutron states, which can be obtained from lattice QCD calculations.
description: 47 pages including references, 1 figure
Modified Double Poisson Brackets
Creators: name: Arthamonov, Semeon
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics

description: We propose a non skew-symmetric generalization of the original definition of double Poisson Bracket by M. Van den Bergh. It allows one to explicitly construct more general class of H0-Poisson structures on finitely generated associative algebras. We show that modified double Poisson brackets inherit certain major properties of the double Poisson brackets.
description: Appendix with an application to Integrable Systems was added
Internet Marketing For Residential Real Estate Development Companies in Addis Ababa - Opportunities and Challenges
Creators: name: Wondimu, Henock
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2008

description: Internet marketing is the practice of introducing, promoting and communicating customers for products and services using the internet. It has been used since the introduction of the Internet by different industries. Real estate companies in the developed countries use Internet marketing integrating with their business strategies. The practice is new for Ethiopian companies and enough research has not been done in this aspect. The aim of this study was to explore the opportunities and challenges of Internet marketing for real estate development companies in Addis Ababa. The external ICT environment and the internal environment was the focus of the analysis. A sample of eighteen companies was used to examine their internal environment with respect to Internet marketing. The response of sixteen companies were obtained and analyzed. It was found out that the sample companies had very limited experience with Internet marketing. Potential benefits, with respect to customer relations (e-CRM), research (e-Research), promotional areas, were observed. Challenges posed by the External ICT environment were also important points to consider by the companies while formulating their Internet marketing and overall business strategies.
Exploring how deviations from the Kerr metric can affect SMBH images
Creators: name: Agurto-Sepulveda, F.
name: Lagunas, J. H
name: Pedreros, J.
name: Bandyopadhyay, B.
name: Schleicher, D. R. G
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Black holes (BH) are objects described by General Relativity (GR), particularly by the Kerr solution. However, this solution is based on simplifying assumptions. To achieve a more realistic approach, we investigate the impact of deviations from the Kerr solution on the imaging of supermassive black holes (SMBH). We conduct General Relativistic Radiation Transport simulations using a Kerr-Like metric, which includes four nonlinear free deviation functions and is stationary, axis-symmetric, and asymptotically flat. The RAPTOR I code, an open-source ray-tracing code capable of handling arbitrary spacetimes, is employed to generate the images. We analyze the asymmetry, diameter, and shadow displacement of the BH to compare them with those of a Kerr BH. Our findings confirm that these deviations significantly affect the shape of the shadow. However, we acknowledge the importance of considering the matter distribution and emissivities surrounding the BH, as the results cannot be solely inferred from the shape of the photon ring.
description: 3 pages, 2 figures,Accepted for publication in Bolet\'in de la Asociaci\'on Argentina de Astronom\'ia
Spin Density Wave versus Fractional Magnetization Plateau in a Triangular Antiferromagnet
Creators: name: Facheris, L.
name: Povarov, K. Yu.
name: Nabi, S. D.
name: Mazzone, D. G.
name: Lass, J.
name: Roessli, B.
name: Ressouche, E.
name: Yan, Z.
name: Gvasaliya, S.
name: Zheludev, A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We report an excellent realization of the highly non-classical incommensurate spin-density wave (SDW) state in the quantum frustrated antiferromagnetic insulator Cs$_2$CoBr$_4$. In contrast to the well-known Ising spin chain case, here the SDW is stabilized by virtue of competing planar in-chain anisotropies and frustrated interchain exchange. Adjacent to the SDW phase is a broad $m = 1/3$ magnetization plateau that can be seen as a commensurate locking of the SDW state into the up-up-down (UUD) spin structure. This represents the first example of long-sought SDW-UUD transition in triangular-type quantum magnets.
description: 13 pages, 13 figures
Learn Quantum Mechanics with Haskell
Creators: name: Walck, Scott N.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Programming Languages (cs.PL)
subject: Quantum Physics (quant-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: To learn quantum mechanics, one must become adept in the use of various mathematical structures that make up the theory; one must also become familiar with some basic laboratory experiments that the theory is designed to explain. The laboratory ideas are naturally expressed in one language, and the theoretical ideas in another. We present a method for learning quantum mechanics that begins with a laboratory language for the description and simulation of simple but essential laboratory experiments, so that students can gain some intuition about the phenomena that a theory of quantum mechanics needs to explain. Then, in parallel with the introduction of the mathematical framework on which quantum mechanics is based, we introduce a calculational language for describing important mathematical objects and operations, allowing students to do calculations in quantum mechanics, including calculations that cannot be done by hand. Finally, we ask students to use the calculational language to implement a simplified version of the laboratory language, bringing together the theoretical and laboratory ideas.
description: In Proceedings TFPIE 2015/6, arXiv:1611.08651
Gerd Peter: Wissenspolitik und Wissensarbeit als Gesellschaftsreform. Asugewählte Beiträge zur Arbeitsforschung 1972-2002 (Dortmunder Beiträge zur Sozial- und Gesellschaftspolitik, Bd. 50), Münster: Lit. Verlag, 2003, ISBN 3-8258-7213-0, 435 S., Euro 29,90
Creators: name: Wolf, Frieder O.
Publisher: name: Lucius & Lucius Verlagsgesellschaft
Year: 2004
Subjects: subject: 300
subject: 650

description: Arbeit
Amtliche Mitteilungen der Universität Dortmund Nr. 09
Creators: name: (:Unkn) Unknown
Publisher: name: Universität Dortmund
Year: 1972
Subjects: subject: 080

description: Satzung der Studentenschaft der Universität Dortmund
description: Amtliche Mitteilungen der Universität Dortmund ; 9
Classification of families of pr- and epr-sequences
Creators: name: Martínez-Rivera, Xavier
Publisher: name: arXiv
Year: 2016
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: This paper establishes new restrictions for attainable enhanced principal rank characteristic sequences (epr-sequences). These results are then used to classify two related families of sequences that are attainable by a real symmetric matrix: the family of principal rank characteristic sequences (pr-sequences) not containing three consecutive $1$s and the family of epr-sequences which contain an $\tt{N}$ in every subsequence of length $3$.
description: 21 pages. The Version of Record of this manuscript has been published and is available in Linear and Multilinear Algebra (since October 26, 2016) at http://www.tandfonline.com/10.1080/03081087.2016.1248345
Driven Topological Systems in the Classical Limit
Creators: name: Duncan, Callum W.
name: Ohberg, Patrik
name: Valiente, Manuel
Publisher: name: arXiv
Year: 2016
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Cellular Automata and Lattice Gases (nlin.CG)
subject: FOS: Physical sciences

description: Periodically-driven quantum systems can exhibit topologically non-trivial behaviour, even when their quasi-energy bands have zero Chern numbers. Much work has been conducted on non-interacting quantum-mechanical models where this kind of behaviour is present. However, the inclusion of interactions in out-of-equilibrium quantum systems can prove to be quite challenging. On the other hand, the classical counterpart of hard-core interactions can be simulated efficiently via constrained random walks. The non-interacting model proposed by Rudner et al. [Phys. Rev. X 3, 031005 (2013)], has a special point for which the system is equivalent to a classical random walk. We consider the classical counterpart of this model, which is exact at a special point even when hard-core interactions are present, and show how these quantitatively affect the edge currents in a strip geometry. We find that the interacting classical system is well described by a mean-field theory. Using this we simulate the dynamics of the classical system, which show that the interactions play the role of Markovian, or time dependent disorder. By comparing the evolution of classical and quantum edge currents in small lattices, we find regimes where the classical limit considered gives good insight into the quantum problem.
description: 15 pages, 15 figures, new content on the quantum model
Amtliche Mitteilungen der Universität Dortmund Nr. 21
Creators: name: (:Unkn) Unknown
Publisher: name: Universität Dortmund
Year: 1973
Subjects: subject: 080

description: Diplomprüfungsordnung für das Fach Elektrotechnik
description: Amtliche Mitteilungen der Universität Dortmund ; 21
A Spatio-Temporal Multilayer Perceptron for Gesture Recognition
Creators: name: Holzbock, Adrian
name: Tsaregorodtsev, Alexander
name: Dawoud, Youssef
name: Dietmayer, Klaus
name: Belagiannis, Vasileios
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Gesture recognition is essential for the interaction of autonomous vehicles with humans. While the current approaches focus on combining several modalities like image features, keypoints and bone vectors, we present neural network architecture that delivers state-of-the-art results only with body skeleton input data. We propose the spatio-temporal multilayer perceptron for gesture recognition in the context of autonomous vehicles. Given 3D body poses over time, we define temporal and spatial mixing operations to extract features in both domains. Additionally, the importance of each time step is re-weighted with Squeeze-and-Excitation layers. An extensive evaluation of the TCG and Drive&Act datasets is provided to showcase the promising performance of our approach. Furthermore, we deploy our model to our autonomous vehicle to show its real-time capability and stable execution.
description: Accepted for presentation at the 33rd IEEE Intelligent Vehicles Symposium (IV 2022), June 5 - June 9, 2022, Aachen, Germany
Personal circumstance, political persuasions : a studio investigation into the migrant experience of a Malaysian living in Australia
Creators: name: Jegadeva, Anurendra.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Transfer of spin to orbital angular momentum in the Bethe-Heitler process
Creators: name: Lei, Shaohu
name: Liu, Shiyu
name: Wang, Weiqing
name: Bu, Zhigang
name: Shen, Baifei
name: Ji, Liangliang
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: According to the conservation of angular momentum, when a plane-wave polarized photon splits into a pair of electron-positron under the influence of the Coulomb field, the spin angular momentum (SAM) of the photon is converted into the angular momentum of the leptons. We investigate this process (the Bethe-Heitler process) by describing the final electron and positron with twisted states and find that the SAM of the incident photon is not only converted into SAM of the produced pair, but also into their orbital angular momentum (OAM), which has not been considered previously. The average OAM gained by the leptons surpasses the average SAM, while their orientations coincide. Both properties depend on the energy and open angle of the emitted leptons. The demonstrated spin-orbit transfer shown in the Bethe-Heitler process may exist in a large group of QED scattering processes.
Assessment of Neighborhood Indicators in Addis Ababa Condominium Housing Projects to Enhance Sustainable Urban Development
Creators: name: Della, Amanuel
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2018

description: This study has assessed the neighborhood indicators of Addis Ababa condominium housing program to encourage the use of physical proximity and disparity for sustainable urban development. Neighborhood indicators are quantitative measures of neighborhood quality, including measures of attributes such as crime, noise, proximity to parks, transit services, social capital, and student performance. However, condominium housing neighborhood is very complex and it has multi-dimensional impact, there is an opportunity of physical proximity and a potential of disparity hidden in the society. Thus, the research design used was a mixed approach; which incorporates both qualitative and quantitative approaches. Questionnaires have been distributed for condominium house inhabitants on a random basis by using proportionate sampling method in Jammo, Gofa Mabirat, Gotera, Summit, Bole Arabisa and Yeka Abado sites. Personal Interview and discussion was conducted with housing officials from AAHCP office, AAHA, and MUDH. Percentage, mean, tables, and graphs were generated using SPSS to analyze and examine the quantitative data. Furthermore, group discussions were made with the residents and LDP document analyzed and elaborated qualitatively. Although the program has introduced new way of housing for the society that has never imagined, the result of this survey shows that the low level of neighborhood quality is affecting the day to day life of the residents. According to the survey results, there is very weak social cohesiveness that results in different social costs; poor safety and security level that exposed inhabitants to different crimes, disturbance, drugs and immoral practice. On other hand, there is poorly developed neighborhood with respect to open space and recreational centers like children playground and youth center and also shortage of social service centers in nearby like health centers and schools that affect the future human capital development. In addition, there is low level of infrastructure investments, poor linkage with employment centers and industries that affecting the wellbeing of the inhabitants. In general the idea of condominium houses is noble but the implementation has many problems. Therefore, this study can be used as a reference on future condominium projects to improve the neighborhood quality for sustainable urban development.
SVCNet: Scribble-based Video Colorization Network with Temporal Aggregation
Creators: name: Zhao, Yuzhi
name: Po, Lai-Man
name: Liu, Kangcheng
name: Wang, Xuehui
name: Yu, Wing-Yin
name: Xian, Pengfei
name: Zhang, Yujia
name: Liu, Mengyang
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Multimedia (cs.MM)
subject: FOS: Computer and information sciences

description: In this paper, we propose a scribble-based video colorization network with temporal aggregation called SVCNet. It can colorize monochrome videos based on different user-given color scribbles. It addresses three common issues in the scribble-based video colorization area: colorization vividness, temporal consistency, and color bleeding. To improve the colorization quality and strengthen the temporal consistency, we adopt two sequential sub-networks in SVCNet for precise colorization and temporal smoothing, respectively. The first stage includes a pyramid feature encoder to incorporate color scribbles with a grayscale frame, and a semantic feature encoder to extract semantics. The second stage finetunes the output from the first stage by aggregating the information of neighboring colorized frames (as short-range connections) and the first colorized frame (as a long-range connection). To alleviate the color bleeding artifacts, we learn video colorization and segmentation simultaneously. Furthermore, we set the majority of operations on a fixed small image resolution and use a Super-resolution Module at the tail of SVCNet to recover original sizes. It allows the SVCNet to fit different image resolutions at the inference. Finally, we evaluate the proposed SVCNet on DAVIS and Videvo benchmarks. The experimental results demonstrate that SVCNet produces both higher-quality and more temporally consistent videos than other well-known video colorization approaches. The codes and models can be found at https://github.com/zhaoyuzhi/SVCNet.
description: accepted by IEEE Transactions on Image Processing (TIP)
Vortex and disclination structures in a nematic-superconductor state
Creators: name: Barci, Daniel G.
name: Clarim, Rafael V.
name: Júnior, Nei L. Silva
Publisher: name: arXiv
Year: 2016
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The nematic-superconductor state is an example of a quantum liquid crystal that breaks gauge as well as rotation invariance. It was conjectured to exist in the pseudogap regime of the cuprates high $T_c$ superconductors. The nematic-superconductor state is characterized by two complex order parameters: one of them is related with superconductivity and the other one describes a nematic order. It supports two main classes of topological defects: half-vortices and disclinations. In this paper we present a Ginzburg-Landau approach to study the structure of these topological defects. Due to a geometrical coupling between the superconductor and the nematic order parameters, we show that vortices are strongly coupled with disclinations. We have found a restoring force between vortices and disclinations that produces harmonic excitations whose natural frequency depends on the geometrical coupling constant and the superconductor condensation energy. Moreover, in a regime with high density of defects, we have found a structural phase transition between vortex-disclination lattices with different symmetries.
description: 16 pages, 8 figures, paper highly improved. Section IV rewritten. Appendix added. Several references added. Main results unchanged. Final version accepted for publication in Physical Review B
"Assessment of Regular Gasoline Adulteration at Addis Ababa Fuel Stations".
Creators: name: Mekuria, Tegegne
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2015

description: This research project is done for the primary purpose of assessing regular gasoline (commonly called Benzene in Ethiopia) adulteration and whether the regular gasoline sold at Addis Ababa fuel stations are within the standard set by the Ethiopian Standard Authority (ESA). The study considers taking a sample of gasoline from fuel stations at Addis Ababa and conducted two types laboratory testing methods; ASTM D86 (Distillation) and ASTM D1298 (Density determination). In addition a survey is conducted to assess consumer's awareness and government authority's effectiveness in controlling the fuel adulteration at Addis petrol stations. Both the laboratory testing and the survey suggested that there is regular gasoil adulteration at Addis Ababa fuel station.
The Bricklayer Ecosystem - Art, Math, and Code
Creators: name: Winter, Victor
name: Love, Betty
name: Corritore, Cindy
Publisher: name: arXiv
Year: 2016
Subjects: subject: Programming Languages (cs.PL)
subject: Graphics (cs.GR)
subject: FOS: Computer and information sciences
subject: D.1.1; I.3.4; J.1; J.5; K.3.2;

description: This paper describes the Bricklayer Ecosystem - a freely-available online educational ecosystem created for people of all ages and coding backgrounds. Bricklayer is designed in accordance with a "low-threshold infinite ceiling" philosophy and has been successfully used to teach coding to primary school students, middle school students, university freshmen, and in-service secondary math teachers. Bricklayer programs are written in the functional programming language SML and, when executed, create 2D and 3D artifacts. These artifacts can be viewed using a variety of third-party tools such as LEGO Digital Designer (LDD), LDraw, Minecraft clients, Brickr, as well as STereoLithography viewers.
description: In Proceedings TFPIE 2015/6, arXiv:1611.08651
Knowledge Graph Contrastive Learning for Recommendation
Creators: name: Yang, Yuhao
name: Huang, Chao
name: Xia, Lianghao
name: Li, Chenliang
Publisher: name: arXiv
Year: 2022
Subjects: subject: Information Retrieval (cs.IR)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Knowledge Graphs (KGs) have been utilized as useful side information to improve recommendation quality. In those recommender systems, knowledge graph information often contains fruitful facts and inherent semantic relatedness among items. However, the success of such methods relies on the high quality knowledge graphs, and may not learn quality representations with two challenges: i) The long-tail distribution of entities results in sparse supervision signals for KG-enhanced item representation; ii) Real-world knowledge graphs are often noisy and contain topic-irrelevant connections between items and entities. Such KG sparsity and noise make the item-entity dependent relations deviate from reflecting their true characteristics, which significantly amplifies the noise effect and hinders the accurate representation of user's preference. To fill this research gap, we design a general Knowledge Graph Contrastive Learning framework (KGCL) that alleviates the information noise for knowledge graph-enhanced recommender systems. Specifically, we propose a knowledge graph augmentation schema to suppress KG noise in information aggregation, and derive more robust knowledge-aware representations for items. In addition, we exploit additional supervision signals from the KG augmentation process to guide a cross-view contrastive learning paradigm, giving a greater role to unbiased user-item interactions in gradient descent and further suppressing the noise. Extensive experiments on three public datasets demonstrate the consistent superiority of our KGCL over state-of-the-art techniques. KGCL also achieves strong performance in recommendation scenarios with sparse user-item interactions, long-tail and noisy KG entities. Our implementation codes are available at https://github.com/yuh-yang/KGCL-SIGIR22
description: This paper has been published as a full paper at SIGIR 2022
Entanglement by Path Identity
Creators: name: Krenn, Mario
name: Hochrainer, Armin
name: Lahiri, Mayukh
name: Zeilinger, Anton
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Quantum entanglement is one of the most prominent features of quantum mechanics and forms the basis of quantum information technologies. Here we present a novel method for the creation of quantum entanglement in multipartite and high-dimensional systems. The two ingredients are 1) superposition of photon pairs with different origins and 2) aligning photons such that their paths are identical. We explain the experimentally feasible creation of various classes of multiphoton entanglement encoded in polarization as well as in high-dimensional Hilbert spaces -- starting only from non-entangled photon pairs. For two photons, arbitrary high-dimensional entanglement can be created. The idea of generating entanglement by path identity could also apply to other quantum entities than photons. We discovered the technique by analyzing the output of a computer algorithm. This shows that computer designed quantum experiments can be inspirations for new techniques.
description: 6+4 pages, 4+3 figures
Networking and Business Performance of Medium Sized Enterprises in Addis Ababa
Creators: name: Mulatu, Firew
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2014

description: In order to stay competitive in business and upgrade performance, SMEs need to work in collaboration with others. To do this in today's the so-called a "one village" world it is necessary to create chain that gives value for business through networking. The purpose of this study was to test the impact of networking on the business performance of medium sized enterprises in Addis Ababa. The questionnaire survey method was used in this study to collect data from respondents. The data was collected from 128 samples of respondents identified through stratified random sampling technique and the collected data was analyzed using ordered probit model: which is one of nonlinear models used for analyzing data measured on ordinal scale. In this survey study it was found that networking with financial institutions, business associates, and quality of the relationship in network positively and significantly related with business performance of medium sized enterprises. In addition to this, the resource acquisition capability of the network was negatively and significantly related with business performance of medium sized enterprises. The result of this study suggests that networking relationship with different types of supporting institutions and business associations significantly improves the business performance of medium sized enterprises in Addis Ababa.
Amtliche Mitteilungen der Universität Dortmund Nr. 11/92
Creators: name: (:Unkn) Unknown
Publisher: name: Universität Dortmund
Year: 1992
Subjects: subject: 080

description: Amtlicher Teil: Änderung der Beitragsordnung der Studentenschaft der Universität Dortmund
description: Verwaltungs- und Benutzungsordnung des Hochschuldidaktischen Zentrums der Universität Dortmund
description: Amtliche Mitteilungen der Universität Dortmund ; 11, 1992
Universal Linear Intensity Transformations Using Spatially-Incoherent Diffractive Processors
Creators: name: Rahman, Md Sadman Sakib
name: Yang, Xilin
name: Li, Jingxi
name: Bai, Bijie
name: Ozcan, Aydogan
Publisher: name: arXiv
Year: 2023
Subjects: subject: Optics (physics.optics)
subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Under spatially-coherent light, a diffractive optical network composed of structured surfaces can be designed to perform any arbitrary complex-valued linear transformation between its input and output fields-of-view (FOVs) if the total number (N) of optimizable phase-only diffractive features is greater than or equal to ~2 Ni x No, where Ni and No refer to the number of useful pixels at the input and the output FOVs, respectively. Here we report the design of a spatially-incoherent diffractive optical processor that can approximate any arbitrary linear transformation in time-averaged intensity between its input and output FOVs. Under spatially-incoherent monochromatic light, the spatially-varying intensity point spread functon(H) of a diffractive network, corresponding to a given, arbitrarily-selected linear intensity transformation, can be written as H(m,n;m',n')=|h(m,n;m',n')|^2, where h is the spatially-coherent point-spread function of the same diffractive network, and (m,n) and (m',n') define the coordinates of the output and input FOVs, respectively. Using deep learning, supervised through examples of input-output profiles, we numerically demonstrate that a spatially-incoherent diffractive network can be trained to all-optically perform any arbitrary linear intensity transformation between its input and output if N is greater than or equal to ~2 Ni x No. These results constitute the first demonstration of universal linear intensity transformations performed on an input FOV under spatially-incoherent illumination and will be useful for designing all-optical visual processors that can work with incoherent, natural light.
description: 29 Pages, 10 Figures
Amtliche Mitteilungen der Universität Dortmund Nr. 04/93
Creators: name: (:Unkn) Unknown
Publisher: name: Universität Dortmund
Year: 1993
Subjects: subject: 080

description: Amtlicher Teil: Ordnung für die Erhebung eines Finanzierungsbeitrages für die Teilnahme am Hochschulsport der Universität Dortmund (Entgeltordnung)
description: Amtliche Mitteilungen der Universität Dortmund ; 4, 1993