cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Robust Atom Optics for Bragg Atom Interferometry
Creators: name: Louie, Garrett
name: Chen, Zilin
name: Deshpande, Tejas
name: Kovachy, Timothy
Publisher: name: arXiv
Year: 2023
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Multi-photon Bragg diffraction is a powerful method for fast, coherent momentum transfer of atom waves. However, laser noise, Doppler detunings, and cloud expansion limit its efficiency in large momentum transfer (LMT) pulse sequences. We present simulation studies of robust Bragg pulses developed through numerical quantum optimal control. Optimized pulse performance under noise and cloud inhomogeneities is analyzed and compared to analogous Gaussian and adiabatic rapid passage (ARP) pulses in simulated LMT Mach-Zehnder interferometry sequences. The optimized pulses maintain robust population transfer and phase response over a broader range of noise, resulting in superior contrast in LMT sequences with thermal atom clouds and intensity inhomogeneities. Large optimized LMT sequences use lower pulse area than Gaussian pulses, making them less susceptible to spontaneous emission loss. The optimized sequences maintain over five times better contrast with tens of $\hbar k$ momentum separation and offers more improvement with greater LMT. Such pulses could allow operation of Bragg atom interferometers with unprecedented sensitivity, improved contrast, and hotter atom sources.
description: 8 pages, 7 figures
Manifest Duality for Partially Massless Higher Spins
Creators: name: Hinterbichler, Kurt
name: Joyce, Austin
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: In four dimensions, partially massless fields of all spins and depths possess a duality invariance akin to electric-magnetic duality. We construct metric-like gauge invariant curvature tensors for partially massless fields of all integer spins and depths, and show how the partially massless equations of motion can be recovered from first order field equations and Bianchi identities for these curvatures. This formulation displays duality in its manifestly local and covariant form, in which it acts to interchange the field equations and Bianchi identities.
description: 46 pages, 1 figure
d-bar and 3overline(He) Production in sqrt(sNN) = 130 GeV Au + Au Collisions
Creators: name: Adler, C.
name: Ahammed, Z.
name: Allgower, C.
name: Amonett, J.
name: Anderson, B. D.
Publisher: name: The American Physical Society
Year: 2001
Subjects: subject: 530

description: Physical Review Letters
Factors Affecting Rural to Urban Migration in Wolita Zone: The Case of Sodo Zuria
Creators: name: Adane, Shibru
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2019

description: The main objective of the study was to assess factors affecting rural to urban migration in Sodo Zuria Woreda of Wolita zone. Accordingly, data were collected from 242 migrant household heads from different kebeles of the Woreda. Both primary and secondary data were employed and analyzed quantitatively and qualitatively. The study revealed that migrants flee to Sodo city in search of employment and to use urban amenities such as education, health and other service facilities. The outflow of the young and economically active people from the rural agricultural sector has a negative effect on productivity in the rural areas and as a consequence the urban area faces problems related to shortage of housing, unemployment, increasing cost of living and lack of social services. Hence, to curve the rural to urban migration, it needs the formation and engagement in the small enterprises by creating market linkages.
Amtliche Mitteilungen der Universität Dortmund Nr. 24
Creators: name: (:Unkn) Unknown
Publisher: name: Universität Dortmund
Year: 1973
Subjects: subject: 080

description: Vorläufige Diplom-Prüfungsordnung der Abteilung Fertigungstechnik
description: Amtliche Mitteilungen der Universität Dortmund ; 24
Amtliche Mitteilungen der Universität Dortmund Nr. 43
Creators: name: (:Unkn) Unknown
Publisher: name: Universität Dortmund
Year: 1974
Subjects: subject: 080

description: Ergänzung zur Beitragsordnung Studentenwerksgesetz
description: Promotionsordnung der Abteilung Raumplanung
description: Vorläufige Promotionsordnung der Abteilung Bauwesen
description: Amtliche Mitteilungen der Universität Dortmund ; 43
Topological aspects of the multi-language phases of the Naming Game on community-based networks
Creators: name: Palombi, Filippo
name: Toti, Simona
Publisher: name: arXiv
Year: 2016
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The Naming Game is an agent-based model where individuals communicate to name an initially unnamed object. On a large class of networks continual pairwise interactions lead the system to an ultimate consensus state, in which agents converge on a globally shared name. Soon after the introduction of the model, it was observed in literature that on community-based networks the path to consensus passes through metastable multi-language states. Subsequently, it was proposed to use this feature as a mean to discover communities in a given network. In this paper we show that metastable states correspond to genuine multi-language phases, emerging in the thermodynamic limit when the fraction of links connecting communities drops below critical thresholds. In particular, we study the transition to multi-language states in the stochastic block model and on networks with community overlap. We also examine the scaling of critical thresholds under variations of topological properties of the network, such as the number and relative size of communities and the structure of intra-/inter-community links. Our results provide a theoretical justification for the proposed use of the model as a community-detection algorithm.
description: 41 pages, 13 figures. Version accepted for publication in Games (special issue "Evolutionary Games and Statistical Physics of Social Networks")
A Bright First Day for Tidal Disruption Event
Creators: name: Huang, Xiaoshan
name: Davis, Shane W.
name: Jiang, Yan-fei
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Stream-stream collision may be an important pre-peak energy dissipation mechanism in tidal disruption events (TDEs). We perform local three-dimensional radiation hydrodynamic simulations in a wedge geometry including the gravity to study stream self-crossing, with emphasis on resolving the collision and following the subsequent outflow. We find that the collision can contribute to pre-peak optical emissions by converting $\gtrsim5\%$ of stream kinetic energy to radiation, yielding prompt emission of $\sim10^{42-44}\rm erg~s^{-1}$. The radiative efficiency is sensitive to stream mass fallback rates, and strongly depends on the downstream gas optical depth. Even for a sub-Eddington ($10\%$) mass fallback rate, the strong radiation pressure produced in the collision can form a local super-Eddington region near the collision site, where a fast, aspherical outflow is launched. Higher mass fallback rate usually leads to more optically-thick outflow and lower net radiative efficiency. For $\dot{M}\gtrsim0.1\dot{M}_{\rm Edd}$, the estimated photosphere size of the outflow can expand by one to two orders of magnitudes reaching $\sim10^{14}\rm cm$. The average gas temperature at this photospheric surface is a few $\times10^{4}$K, roughly consistent with inferred pre-peak photosphere properties for some optical TDEs. We find that the dynamics is sensitive to collision angle and collision radius, but the radiative efficiency or outflow properties show more complex dependency than is often assumed in ballistic models.
description: 18 pages, 18 figures, Submitted to ApJ. Comments are welcomed and appreciated!
Island Hopping of active colloids
Creators: name: Tanuku, Venkata Manikantha Sai Ganesh
name: Vogel, Peter
name: Palberg, Thomas
name: Buttinoni, Ivo
Publisher: name: arXiv
Year: 2023
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Individual self-propelled colloidal particles, like active Brownian particles (ABP) or run-and-tumble swimmers (RT), exhibit characteristic and well-known motion patterns. However, their interaction with obstacles remains an open and important problem. We here investigate the two-dimensional motion of silica-gold Janus particles (JP) actuated by AC electric fields and suspended and cruising through silica particles organized in rafts by mutual phoretic attraction. A typical island contains dozens of particles. The JP travels straight in obstacle-free regions and reorients systematically upon approaching an island. As an underlying mechanism, we tentatively propose a hydrodynamic torque exerted by the solvent flow towards the islands on the JP local flow field, leading to an alignment of respective solvent flow directions. This systematic behavior is in contrast with the reorientation observed for free active Brownian particles and run-and-tumble microswimmers.
description: 13 pages,4 main figures, 2 supplementary figures
Nambu-Jona-Lasinio model with Wilson fermions
Creators: name: Rantaharju, Jarno
name: Drach, Vincent
name: Pica, Claudio
name: Sannino, Francesco
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We present a lattice study of a Nambu Jona-Lasinio (NJL) model using Wilson fermions. Four fermion interactions are a natural part of several extensions of the Standard Model, appearing as a low energy description of a more fundamental theory. In models of dynamical electroweak symmetry breaking they are used to endow the Standard Model fermions with masses. In infrared conformal models these interaction, when sufficiently strong, can alter the dynamics of the fixed point, turning the theory into a (near) conformal model with desirable features for model building. As a first step toward the nonperturbative study of these models, we study the phase space of the ungauged NJL model.
description: 12 pages, 5 figures
Characteristic, dynamic, and near saturation regions of Out-of-time-order correlation in Floquet Ising models
Creators: name: Shukla, Rohit Kumar
name: Mishra, Sunil Kumar
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study characteristic, dynamic, and saturation regimes of the out-of-time-order correlation (OTOC) in the constant field Floquet system with and without longitudinal field. In the calculation of OTOC, we take local spins in longitudinal and transverse directions as observables which are local and non-local in terms of Jordan-Wigner fermions, respectively. We use the exact analytical solution of OTOC for the integrable model (without longitudinal field term) with transverse direction spins as observables and numerical solutions for other integrable and nonintegrable cases. OTOCs generated in both cases depart from unity at a kick equal to the separation between the observables when the local spins in the transverse direction and one additional kick is required when the local spins in the longitudinal direction. The number of kicks required to depart from unity depends on the separation between the observables and is independent of the Floquet period and system size. In the dynamic region, OTOCs show power-law growth in both models, the integrable (without longitudinal field) as well as the nonintegrable (with longitudinal field). The exponent of the power-law increases with increasing separation between the observables. Near the saturation region, OTOCs grow linearly with a very small rate.
description: 12 pages, 7 figures
Chemical Engineering Department Environmental Engineering Stream Anaerobic Co-Digstion of Sewage Sludge and Abattoir Wastes to Enhance Biogas Production
Creators: name: Aberra, Dida
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2010

description: Concerns about the managing of sewage sludge for an ever increasing trends of sewage sludge generation coupled with the complex sludge characteristics is a big challenge for Addis Ababa Water Supply Authority. Accumulation of large volumes of dried sludge (cake) in treatment compound has become common. Since sewage sludge contains toxic pollutants and disease-causing organisms and the failure to properly manage sewage sludge may have adverse effects on human health and the environment. As a result, the city water supply authority has to search for holistic and systematic ways of managing it. In this study, a lab scale batch anaerobic co-digestion of sewage sludge and abattoir wastes under mesophilic condition for 20 days was used to digest sewage sludge taken from Kaliti dump site and reduction in volume of the wastes as a result of anaerobic digestion, production of methane and soil conditioner potential were analyzed. Abattoir wastes were co-digested with sewage sludge so as to enhance its nutrient values. 100% SS, 80%SS:20%WA and 60%SS: 40%AW mix ratio were used to analysis the biogas productivities of different mix ratios and 33.8%, 48.3% and 56.9% methane were obtained for SS alone, 80%SS:20%AW and 60%SS: 40%AW respectively. Reductions in volume of the sludge after digestion were also seen as the mix ratio increases. The obtained results are generally consistent with the data from literature where co-digestion of sewage sludge with other substrates rather than abattoir wastes were used. Key words: Biogas, Sewage sludge, abattoir waste, co-digestion XII
Amtliche Mitteilungen der Universität Dortmund Nr. 04/2000
Creators: name: (:Unkn) Unknown
Publisher: name: Universität Dortmund
Year: 2000
Subjects: subject: 080

description: Berichtigung zur dritten Satzung zur Änderung der Promotionsordnung für die Wirtschafts- und Sozialwissenschaftliche Fakultät vom 09. 10. 1999 (Amtliche Mitteilungen 1/2000 S. 1)
description: Erste Satzung zur Änderung der Diplomprüfungsordnung für den Studiengang Informatik an der Universität Dortmund vom 12. 11. 1999
description: Satzung zur Änderung der Promotionsordnung für den Fachbereich Sondererziehung und Rehabilitation an der Universität Dortmund vom 12. Dezember 1999
description: Satzung zur Änderung der Studienordnung für den Diplomstudiengang Chemie an der Universität Dortmund vom 24. 02. 2000
description: Zweite Satzung zur Ämderung der Studienordnung für das Studium des Unterrichtsfaches Chemie an der Universität Dortmund mit dem Abschluss "Erste Staatsprüfung für das Lehramt für die Sekundarstufe II" vom 24. 02. 2000
description: Zweite Satzung zur Änderung der Promotionsordnung der Universität Dortmund für die Fakultät Maschinenbau vom 12. Dezember 1999
description: Amtliche Mitteilungen der Universität Dortmund ; 4, 2000
Sensitivity to Supernovae Average $ν_x$ Temperature with Neutral Current Interactions in DUNE
Creators: name: Newmark, Darcy A.
name: Schneider, Austin
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We explore a novel method for measuring the average temperature of the $ν_x$ component in Type-II core-collapse supernovae. By measuring neutral current incoherent neutrino-Argon interactions in DUNE we can obtain spectral information for the combination of all active neutrino species. Combining this all-neutrino spectral information with detailed charged current measurements of the electron neutrino and electron anti-neutrino fluxes from DUNE and Hyper-Kamiokande, we can infer the average temperature for the remaining neutrino species in the $ν_x$ component to within a factor two for most cases and to 30% for a small range of average $ν_x$ temperatures. Due to the limited energy range of the emitted photons from incoherent neutral current interactions on Argon, the $ν_x$ temperature reconstruction demonstrates a degeneracy in the one and two sigma credible regions. Furthermore, while large uncertainties on the NC cross-section penalize this measurement, we examined the efficacy of constraining NC cross-section uncertainties on improving $ν_x$ measurements. We found that if additional measurements of B(M1$\uparrow$) 1$^+$ excited state transitions in Argon are able to reduce correlated cross section uncertainties from 15% to 7%, the size of the $1σ$ allowed regions for $T_{ν_x}$ becomes sample size limited, and approaches the case where there are no uncertainties on the cross-section.
description: 9 pages, 13 figures
BiLS-A-GAN
Creators: name: Yang, Xirui
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 370402
subject: Earth and space science informatics

description: Data and source code of the paper "BiLS-A-GAN: A Privacy-Preserving Method for Fake Trajectory Generation96399". Detailed information of the data can be found in the paper.
The Challenges of Land Banking in Addis Abeba; the Case of Kolfe Keranyo Sub City
Creators: name: Tariku, Yinesu
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2019

description: Land banks are governmental organization that are established for the purpose of converting vacant, abandoned and foreclosed properties into useful factor of production. Land banking was officially established in Addis Ababa city in 2009/2010 under the urban development, banking and urban renewal project office of Addis Ababa city. The land banking practice has been facing a number of challenges since its establishment. This study was undertaking with the main objective of identifying the main challenges of land banking practice in kolfe keranyo sub city of Addis Ababa city. Stratified random sampling and purposive sampling techniques were used to get appropriate data and address the main objective of the study. The study has found out that the main challenges of land banking in kolfe keranyo sub city in particular and Addis Ababa city in general include poor organizational structure, lack of modern land information system, weak financial sources, lack of skilled manpower and weak urban governance system. Since land banking has lots of advantages of economic development of the sub city and has good future development, the government of Ethiopia has to give special attention for the promotion of land banking and effective use of land resources in order to address the future need of urban land for various development activities and achieve governmental plans of the country.
Amtliche Mitteilungen der Universität Dortmund Nr. 10/2000
Creators: name: (:Unkn) Unknown
Publisher: name: Universität Dortmund
Year: 2000
Subjects: subject: 080

description: Dritte Ordnung zur Änderung der Einschreibungsordnung der Universität Dortmund vom 18. Mai 2000
description: Frauenförderrahmenplan der Universität Dortmund
description: Neubekanntmachung der Einschreibungsordnung der Universität Dortmund
description: Amtliche Mitteilungen der Universität Dortmund ; 10, 2000
Amtliche Mitteilungen der Universität Dortmund Nr. 11/2001
Creators: name: (:Unkn) Unknown
Publisher: name: Universität Dortmund
Year: 2001
Subjects: subject: 080

description: Prüfungsordnung Bachelor of Arts (B.A.), Master of Arts (M.A.), Angewandte Literatur-/Kulturwissenschaften, Angewandte Sprachwissenschaften der Universität Dortmund vom 24. 09. 2001
description: Amtliche Mitteilungen der Universität Dortmund ; 11, 2001
Density correlations in ultracold atomic Fermi gases
Creators: name: Belzig, W.
name: Schroll, C.
name: Bruder, C.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We investigate density fluctuations in a coherent ensemble of interacting fermionic atoms. Adapting the concept of full counting statistics, well-known from quantum optics and mesoscopic electron transport, we study second-order as well as higher-order correlators of density fluctuations. Using the mean-field BCS state to describe the whole interval between the BCS limit and the BEC limit, we obtain an exact expression for the cumulant-generating function of the density fluctuations of an atomic cloud. In the two-dimensional case, we obtain a closed analytical expression. Poissonian fluctuations of a molecular condensate on the BEC side are strongly suppressed on the BCS side. The size of the fluctuations in the BCS limit is a direct measure of the pairing potential. We also discuss the BEC-BCS crossover of the third cumulant and the temperature dependence of the second cumulant.
description: 4 pages, 4 figures. To appear in Phys. Rev. A. New calculation of the bin statistics of a free Bose gas; updated and extended bibliography
Graph's Topology and Free Energy of a Spin Model on the Graph
Creators: name: Choi, Jeong-Mo
name: Gilson, Amy I.
name: Shakhnovich, Eugene I.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Biomolecules (q-bio.BM)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: In this work we show that there is a direct relationship between a graph's topology and the free energy of a spin system on the graph. We develop a method of separating topological and enthalpic contributions to the free energy, and find that considering the topology is sufficient to qualitatively compare the free energies of different graph systems at high temperature, even when the energetics are not fully known. This method was applied to the metal lattice system with defects, and we found that it partially explains why point defects are more stable than high-dimensional defects. Given the energetics, we can even quantitatively compare free energies of different graph structures via a closed form of linear graph contributions. The closed form is applied to predict the sequence space free energy of lattice proteins, which is a key factor determining the designability of a protein structure.
Amtliche Mitteilungen der Universität Dortmund Nr. 15/2001
Creators: name: (:Unkn) Unknown
Publisher: name: Universität Dortmund
Year: 2001
Subjects: subject: 080

description: Änderungsordnung der Fachbereichsordnung für den Fachbereich Musik, Kunst, Textilgestaltung, Sport und Geographie der Universität Dortmund
description: Änderungsordnung der Fachbereichsordnung für die Fakultät Raumplanung
description: Fachbereichsordnung für den Fachbereich Statistik der Universität Dortmund
description: Ordnung für die Zulassung fremdsprachiger Studienbewerberinnen und Studienbewerber (Ausländerzulassungssatzung) der Universität Dortmund
description: Ordnung zur Änderung der Schließfachordnung für die Zentralbibliothek der Universitätsbibliothek Dortmund vom 21. 3. 1984 (AM 1/84 vom 21. 3. 84), zuletzt geändert am 28. 11. 1995 (AM 12/95 vom 6. 12. 95)
description: Amtliche Mitteilungen der Universität Dortmund ; 15, 2001
Model reduction of Brownian oscillators: quantification of errors and long-time behaviour
Creators: name: Colangeli, M.
name: Duong, M. H.
name: Muntean, A.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Analysis of PDEs (math.AP)
subject: Mathematical Physics (math-ph)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: A procedure for model reduction of stochastic ordinary differential equations with additive noise was recently introduced in [Colangeli-Duong-Muntean, Journal of Physics A: Mathematical and Theoretical, 2022], based on the Invariant Manifold method and on the Fluctuation-Dissipation relation. A general question thus arises as to whether one can rigorously quantify the error entailed by the use of the reduced dynamics in place of the original one. In this work we provide explicit formulae and estimates of the error in terms of the Wasserstein distance, both in the presence or in the absence of a sharp time-scale separation between the variables to be retained or eliminated from the description, as well as in the long-time behaviour. Keywords: Model reduction, Wasserstein distance, error estimates, coupled Brownian oscillators, invariant manifold, Fluctuation-Dissipation relation.
Glass transitions, semiconductor-metal (SC-M) transitions and fragilities in Ge-V-Te (V=As, or Sb) liquid alloys: the difference one element can make
Creators: name: Wei, Shuai
name: Coleman, Garrett J.
name: Lucas, Pierre
name: Angell, C. Austen
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Glass transition temperatures (Tg) and liquid fragilities are measured along a line of constant Ge content in the system Ge-As-Te, and contrasted with the lack of glass-forming ability in the twin system Ge-Sb-Te at the same Ge content. The one composition established as free of crystal contamination in the latter system shows a behavior opposite to that of more covalent system. Comparison of Tg vs bond density in the three systems Ge-As-chalcogen differing in chalcogen i.e. S, Se, or Te, shows that as the chalcogen becomes more metallic, i.e. in the order S = 2.3. When the more metallic Sb replaces As at greater than 2.3, incipient metallicity rather than directional bond covalency apparently gains control of the physics. This leads us to an examination of the electronic conductivity and, then, semiconductor-to-metal (SC-M) transitions, with their associated thermodynamic manifestations, in relevant liquid alloys. The thermodynamic components, as seen previously, control liquid fragility and cause fragile-to-strong transitions during cooling. We tentatively conclude that liquid state behavior in phase change materials (PCMs) is controlled by liquid-liquid (SC-M) transitions that have become submerged below the liquidus surface. In the case of the Ge-Te binary, a crude extrapolation to GeTe stoichiometry indicates that the SC-M transition lies about 20% below the melting point, suggesting a parallel with the intensely researched "hidden liquid-liquid (LL) transition", in supercooled water. In the water case, superfast crystallization initiates in the high fragility domain some 4% above the TLL which is located at ~15% below the (ambient pressure) melting point.
Utilizing maximum likelihood estimator for flow analysis
Creators: name: Ye, Chong
name: Qian, Wei-Liang
name: Yue, Rui-Hong
name: Hama, Yogiro
name: Kodama, Takeshi
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We explore the possibility of evaluating flow harmonics by employing the maximum likelihood estimator (MLE). For a given finite multiplicity, the MLE simultaneously furnishes estimations for all the parameters of the underlying distribution function while efficiently suppressing the variance of measures. Also, the method provides a means to assess a specific class of mixed harmonics, which is not straightforwardly feasible by the approaches primarily based on particle correlations. The results are analyzed using the Wald, likelihood ratio, and score tests of hypotheses. Besides, the resultant flow harmonics obtained using MLE are compared with those derived using particle correlations and event plane methods. The dependencies of extracted flow harmonics on the multiplicity of individual events and the total number of events are analyzed. It is shown that the proposed approach works efficiently to deal with the deficiency in detector acceptability. Moreover, we elaborate on a fictitious scenario where the event plane is not a well-defined quantity in the distribution function. For the latter case, the MLE is shown to largely perform better than the two-particle correlation estimator. In this regard, one concludes that the MLE furnishes a meaningful alternative to the existing approaches for flow analysis.
description: 15 pages, 5 figures, and 8 tables
Amtliche Mitteilungen der Universität Dortmund Nr. 01/2002
Creators: name: (:Unkn) Unknown
Publisher: name: Universität Dortmund
Year: 2002
Subjects: subject: 080

description: Amtlicher Teil: Beitragsordnung der Studierendenschaft der Universität Dortmund
description: Amtlicher Teil: Erste Ordnung zur Änderung der Beitragsordnung der Studierendenschaft der Universität Dortmund i.d.F. der Neubekanntmachung vom 8. Januar 2001
description: Amtlicher Teil: Fachbereichsordnung für den Fachbereich Mathematik der Universität Dortmund
description: Amtlicher Teil: Fortschreibung der Anlage 1 zur Dienstvereinbarung zwischen der Kanzlerin der Universität Dortmund und dem Personalrat der nichtwissenschaftlich Beschäftigten der Universität Dortmund zur Einführung der gleitenden Arbeitszeit in der zentralen Hochschulverwaltung vom 18.09.00 (AM 11/00 vom 25.09.00) (Stand: 25.01.2002)
description: Amtlicher Teil: Richtlinien für die praktische Ausbildung der Studierenden des Studienganges Wirtschaftsingenieurwesen an der Universität Dortmund
description: Amtlicher Teil: Teil-Studienordnung (Grundstudium) für den Diplomstudiengang Wirtschaftsingenieurwesen an der Universität Dortmund vom 18. Januar 2002
description: Amtliche Mitteilungen der Universität Dortmund ; 1, 2002
Amtliche Mitteilungen der Universität Dortmund Nr. 03/2006
Creators: name: (:Unkn) Unknown
Publisher: name: Universität Dortmund
Year: 2006
Subjects: subject: 080

description: Erste Ordnung zur Änderung der Diplomprüfungsordnung für den Studiengang Journalistik an der Universität Dortmund vom 24.10.2005
description: Fachbereichsordnung für den Fachbereich Kunst- und Sportwissenschaften der Universität Dortmund
description: Vierte Ordnung zur Änderung der Diplomprüfungsordnung für den Studiengang Informatik an der Universität Dortmund vom 24.10.2005
description: Amtliche Mitteilungen der Universität Dortmund ; 3, 2006
Dark Matter in a bi-metric universe
Creators: name: Maldonado, Carlos
name: Mendez, Fernando
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the possibility to describe dark matter in a model of the universe with two scale factors and a non-standard Poisson bracket structure characterized by the deformation parameter κ. The dark matter evolution is analyzed in the early stages of the universe, and its relic density is obtained via the Freeze-In and Freeze-Out mechanism. We show that by fixing \k{appa} and the initial ratio of energy densities present in the different sectors of the universe, the space of thermal average annihilation cross-sections and dark matter masses compatible with the standard cosmology prior to Big Bang Nucleosynthesis (BBN), is enlarged. This feature of the model is compatible with non-standard cosmology.
Amtliche Mitteilungen der Universität Dortmund Nr. 04/2006
Creators: name: (:Unkn) Unknown
Publisher: name: Universität Dortmund
Year: 2006
Subjects: subject: 080

description: Erste Ordnung zur Änderung der Diplomprüfungsordnung für den Studiengang Journalistik an der Universität Dortmund vom 24.10.2005
description: Fachbereichsordnung für den Fachbereich Kunst- und Sportwissenschaften der Universität Dortmund
description: Neubekanntmachung der Ordnung für die Feststellung der besonderen studiengangsbezogenen Eignung in den Bachelor-Studiengängen Sport mit den Abschlüssen: - Bachelor "Fachwissenschaftliches Profil", - Bachelor "Vermittlungswissenschaftliches Profil", - Bachelor "Rehabilitationswissenschaftliches Profil"
description: Amtliche Mitteilungen der Universität Dortmund ; 4, 2006
Amtliche Mitteilungen der Technischen Universität Dortmund Nr. 11/2013
Creators: name: (:Unkn) Unknown
Publisher: name: Technische Universität Dortmund
Year: 2013
Subjects: subject: 080

description: Neubekanntmachung der Promotionsordnung der Fakultät Erziehungswissenschaft und Soziologie der Technischen Universität Dortmund vom 8. Mai 2013
description: Amtliche Mitteilungen der Technischen Universität Dortmund ; 11, 2013
The Implementation of Compulsory Motor Insurance in Ethiopia
Creators: name: Tesfaye, Shimelis
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2015

description: The economic and social damage due to motor vehicle is escalating alarmingly. Among others, one of the measure took by the government of Ethiopia is the recent development of legislation "Vehicle Insurance Against Third Party Risks Proclamation", with the aim of laying down a mechanism to alleviate economic loss as a result of road accident. The implementation of this legislation will affect the insurance industry. In the literature, the law has been practiced for several decades in most countries, but imposes significant impact on insurers' performance. There are two views about its implementation, the first one is compulsory insurance is a social insurance and the government control the entire activities; premium tariff, claim settlement process, policy terms and conditions and the whole enforcement activities in order to achieve its purpose. The other counter argues and advocates private insurer's involvement in compulsory insurance implementation under minimum government control. Despite the law enforced recently in Ethiopia, this paper try to assess the implementation of CTP motor insurance and analyze stakeholder's level of awareness towards CTP insurance. The study considers both primary and secondary data in order to examine implementation of the legislation in achieving its objective and analyze the attitude and perceptions of stakeholders; insurance officers and CTP insurance policyholders. To address the research problem, both quantitative and qualitative research approaches were used. The research findings indicate CTP insurance has positive result to insurers and IFAA. However, fairness of premium tariffs and uniform claim settlement were a challenge and awareness of parties involved in the process had wide gap. IFAA performance to utilize the fund as planned also very low. In general CTP proclamation enforcement failed to address the intended result and lack of awareness had considerable impact on policy implementation. Thus, both the government and insurance association should actively participate in the awareness creation and cooperation between parties involved in the implementation process will address the problems
Scholarly Publishing Is Broken. How Do We Fix It?
Creators: name: Aspesi, Claudio
Publisher: name: Unknown
Year: 2023
Subjects: subject: Scholarly publishing
subject: Scholarly communications
subject: commercialization
subject: research evaluation
subject: inequities

description: Scholarly publishing has been criticized for decades because of its commercialization and its exclusionary design. The problem is even deeper: scholarly publishing as it is designed today is unable to address major scientific emergencies, as the COVID pandemic demonstrated, as publishers were pressured to suspend licenses to access backfiles and many researchers and practitioners used preprints to communicate their ongoing findings. These ad hoc actions do not address other global emergencies (such as climate change and the loss of biodiversity) and it is morally indefensible to adopt them for some diseases and not others. In addition, scholarly publishing has developed into a system of research evaluation and career advancement, introducing distortions that do not benefit the equitable advancement of knowledge, while its high cost (and prices) trigger inequities that affect the most disadvantaged communities and individuals. There is vast experimentation, however, and there will be new models that we cannot even conceive of. It is impossible to be prescriptive about what each of these new or emerging models can do to address the current failings, but some principles can be identified. We are proposing a four-part test that can help decide which models to support, with the goal of starting a debate on what are the appropriate principles that should be adopted.
Optimization of Parameters to Improve the Strength of Concrete Cube Using Bacteria Species
Creators: name: Eman, Negash
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2018

description: Concrete is the most commonly used building material, but the cracks in concrete create problem it was main reason for a decreased service life of concrete structures. Most research done used chemical method which not effective on cost and environmental. So, need of a new technology to overcome the bottle necking of concrete has led to the development of a very special concrete known as Bacterial Concrete. The objective of this thesis was optimizing of parameters to improve the strength of concrete using bacteria bacillus species (Bacillus subitilis, Sporosarcina pasteurii and Bacillus cibi) self-healing method. Proceed was the bacterial strains were obtained from Ethiopia Biodiversity Institute and for each bacterial growth in nutrient broth solution for 24-72 hour. Secondly, according to the mixing design twenty seven concrete mixes for each day and for each bacterial at C25 grades of concrete using water cement ratio 0.58, 0.53 and 0.45 and cement, fine aggregate and course aggregate contents of 360 kg / m 3, 800 kg / m 3 and 1087.5 kg / m 3 were prepared, respectively and tested in 7, 14 and 28 day. Significance of the process variables were analyzed using analysis of variance (ANOVA). Thus, the influence of all experimental variables, factors and interaction effects on the response was investigated. Dosage, time, water/cement ratio and in the case of bacteria Bacillus cibi use interaction between dosage and water cement ratio have significance effect on the compressive strength. As the result of RSM optimization, the best compressive strength were found on the 0.45 water cement ratio, 40 ml of dosage and the time after 14day. Also from the three bacterial Sporosarcina pasteurii selectable or give high compressive strength.
Coulomb drag between helical Luttinger liquids
Creators: name: Kainaris, N.
name: Gornyi, I. V.
name: Levchenko, A.
name: Polyakov, D. G.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We theoretically study Coulomb drag between two helical edges with broken spin-rotational symmetry, such as would occur in two capacitively coupled quantum spin Hall insulators. For the helical edges, Coulomb drag is particularly interesting because it specifically probes the inelastic interactions that break the conductance quantization for a single edge. Using the kinetic equation formalism, supplemented by bosonization, we find that the drag resistivity $ρ_D$ exhibits a nonmonotonic dependence on the temperature $T$. In the limit of low $T$, $ρ_D$ vanishes with decreasing $T$ as a power law if intraedge interactions are not too strong. This is in stark contrast to Coulomb drag in conventional quantum wires, where $ρ_D$ diverges at $T\to 0$ irrespective of the strength of repulsive interactions. Another unusual property of Coulomb drag between the helical edges concerns higher $T$ for which, unlike in the Luttinger liquid model, drag is mediated by plasmons. The special type of plasmon-mediated drag can be viewed as a distinguishing feature of the helical liquid---because it requires peculiar Umklapp scattering only available in the presence of a Dirac point in the electron spectrum.
description: 22 pages, 7 figures
Supermassive Dark Star candidates seen by JWST?
Creators: name: Ilie, Cosmin
name: Paulin, Jillian
name: Freese, Katherine
Publisher: name: arXiv
Year: 2023
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The first generation of stars in the Universe is yet to be observed. There are two leading theories for those objects that mark the beginning of the cosmic dawn: hydrogen burning Population~III stars and Dark Stars, made of hydrogen and helium but powered by Dark Matter heating. The latter can grow to become supermassive ($M_\star\sim 10^6\Msun$) and extremely bright ($L\sim 10^9L_\odot$). We show that each of the following three objects: JADES-GS-z13-0, JADES-GS-z12-0, and JADES-GS-z11-0 (at redshifts $z\in[11,14]$) are consistent with a Supermassive Dark Star interpretation, thus identifying, for the first time, Dark Star candidates.
description: Added complete affiliations for KF. Added preprint numbers from UT Austin and Nordita. Edited acknowledgments to include former collaborators on Dark Stars
Academic Motivation of Students - The German Case
Creators: name: Fischer, Heike
name: Virgillito, Alfredo
name: Wilkesmann, Uwe
Publisher: name: Technische Universität Dortmund
Year: 2012
Subjects: subject: academic motivation
subject: empirical evidence
subject: non-traditional students
subject: 300

description: The concept of motivation is used in many different disciplines to analyze the ‘what and why’ (Deci & Ryan, 2000) of human action. A vast body of literature exists on the relationship of motivation and performance in professional work and organization settings (e.g. Osterloh, Frey & Homberger, 2011; Gagné & Deci, 2005). Motivation is widely acknowledged to enhance performance and efficiency of staff (Ryan & Deci, 2000). Beyond work settings motivation may influence performance in academic settings and among university students. Our main research question asks for factors that influence academic motivation: Can student characteristics and study conditions impact academic motivation? In the following, at first a theoretical view on academic motivation will narrow down the subject of interest and distinguish it from already existing research. Secondly, factors that we assume of having an influence on academic motivation will be presented. We focus on students with non-traditional characteristics, the individual field of studies, different stages of studies, social background, and the organizational perspective of studying. Moreover, we look at the relationship between extrinsic and intrinsic motivation. Finally, our hypotheses will be tested empirically with data from a survey on academic motivation and on the students’ expectations. The survey was conducted at three German universities in 2009.
description: Discussion Papers / Zentrum für Weiterbildung, Technische Unviersität Dortmund;02-2012
Deconstructing time : exploring society's meaurement
Creators: name: Moegerlein, Kirsten.
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.
The shapes of nuclei
Creators: name: Bertsch, G. F.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Gerry Brown initiated some early studies on the coexistence of different nuclear shapes. The subject has continued to be of interest and is crucial for understanding nuclear fission. We now have a very good picture of the potential energy surface with respect to shape degrees of freedom in heavy nuclei, but the dynamics remain problematic. In contrast, the early studies on light nuclei were quite successful in describing the mixing between shapes. Perhaps a new approach in the spirit of the old calculations could better elucidate the character of the fission dynamics and explain phenomena that current theory does not model well.
description: Chapter to be published in a memorial volume to G.E. Brown
Effect Of Marketing Mix On Customer's Brand Preference: (A Case Of St. George Brewery)
Creators: name: Beyene, Birhanu
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2018

description: This study was conducted with an objective of identifying marketing mix on brand preference in the case of St. George brewery. It conceptualized and developed four dimensions of marketing mix: product quality, price, promotion, distribution and branding and tests the relationships between marketing mix, branding and brand preference. This study used both descriptive and explanatory research designs. Convenience sampling methods were used. Data were collected from primary sources through questionnaire and semi-structured interviews and analyzed through both descriptive and explanatory methods. The descriptive analysis was conducted by using mean and standard deviation. On the other hand, explanatory analysis was conducted by using Pearson correlation method and linear regression method. The result indicated that marketing mix has significant positive effect on brand preference for the product. Product quality, promotion and distribution have significant positive effect on brand preference at significance level of 0.01. Product quality has the highest effect and followed by promotion. But effects of pricing and branding have no statistically significant effect on brand preference. Based on the findings the researcher recommends that management of the company has to improve market mix of the company specifically product quality, promotion and distribution.
Continuous matrix product states with periodic boundary conditions and an application to atomtronics
Creators: name: Draxler, Damian
name: Haegeman, Jutho
name: Verstraete, Frank
name: Rizzi, Matteo
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We introduce a time evolution algorithm for one-dimensional quantum field theories with periodic boundary conditions. This is done by applying the Dirac-Frenkel time-dependent variational principle to the set of translational invariant continuous matrix product states with periodic boundary conditions. Moreover, the ansatz is accompanied with additional boundary degrees of freedom to study quantum impurity problems. The algorithm allows for a cutoff in the spectrum of the transfer matrix and thus has an efficient computational scaling. In particular we study the prototypical example of an atomtronic system - an interacting Bose gas rotating in a ring shaped trap in the presence of a localised barrier potential.
Dose rate effects in the radiation damage of the plastic scintillators of the CMS Hadron Endcap Calorimeter
Creators: name: HCAL Collaboration
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We present measurements of the reduction of light output by plastic scintillators irradiated in the CMS detector during the 8 TeV run of the Large Hadron Collider and show that they indicate a strong dose rate effect. The damage for a given dose is larger for lower dose rate exposures. The results agree with previous measurements of dose rate effects, but are stronger due to the very low dose rates probed. We show that the scaling with dose rate is consistent with that expected from diffusion effects.