cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Experimental summary for heavy flavor production
Creators: name: Ma, Rongrong
Publisher: name: arXiv
Year: 2016
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Measurements of heavy flavor production in heavy-ion collisions have played an important role in understanding the properties of the quark-gluon plasma created in such collision. Due to their large masses, heavy flavor quarks present unique sensitivity to the kinematics as well as the dynamics of the hot and dense medium. In this article, a selection of recent measurements on heavy flavor production in p+p, p+A and A+A collisions at both RHIC and LHC energies will be presented. The measurements in p+p collisions serve as benchmarks to fundamental theories, and as references to similar studies in A+A collisions where the hot medium effects are present. On the other hand, the measurements in p+A collisions can help to quantify the cold nuclear matter effects which are also in effect in A+A collisions and thus need to be taken into account when interpreting the measurements in heavy-ion collisions. The experimental results from A+A collisions are discussed and compared to theoretical calculations, which can shed lights on the understanding of the quark-gluon plasma.
description: Proceedings for Strangeness in Quark Matter 2016, UC Berkeley, 27 June to 1 July 2016
Assessment on Factors Affecting Productivity of Employees in the Construction Industry, The Case of Building Projects in Addis Ababa; Executive's Perspective
Creators: name: Ayalew, Mesganaw
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2016

description: This study aimed to examine factors affecting productivity of employees in the construction industry from the point of views of construction company's executives. Factors such as proper management and supervision, innovation, supply chain management of construction inputs, demotivating factors, motivational schemes, competence skill of employees and similar factors contribute to the efficiency and productivity of the construction sector are evaluated. The construction industry in Ethiopia, worth billions of dollars every year and of that enormous sum, significant portion of it is lost as wastage that reduces much the effectiveness and productivity of the sector. The wastage is a combination of many factors out of which problem related to human resources constitute the major share that needs to be addressed in managing construction projects. The sample size for the study is 288 comprising of executives leading and administering Grade 1,2 and 3 construction company's involving in building constructions in Addis Ababa. The sample population was distributed between contracting companies: 146 executives' of grade 1 contractors, 60 executives of grade 2 contractors and 82 executives of grade 3 contractors companies. In the study, quantitative research methods were used. Primary data was obtained using questionnaires and literature sources ware also collected from books, journals, past research works, official documents and the internet. Purposive and random sampling ware used to select proportional number of samples from the study area. Data were analyzed using percentages, and correlation. The study has also focused on examining the extent of awareness of construction company's executives about factors affecting productivity. The results obtained from the study indicated that majority of the respondent executives do not give much attention to factors hindering productivity of employees. Some of the major factors that are given little or no attention includes: compliant management systems, orientation at entry when employees join the company, implementation of effective construction waste management, timely monitoring and evaluation, capacity building schemes, and transparent communication, are some of the major factors neglected in construction companies employees management systems. This paper suggests that there should be continuous effort to identify and raise awareness of construction company executives, core staffs, other employees and actors in the sector to improve the factors affecting productivity of employees in the construction sector with special emphasis to building projects.
Critical dynamical behavior of the Ising model
Creators: name: Liu, Zihua
name: Vatansever, Erol
name: Barkema, Gerard T.
name: Fytas, Nikolaos G.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We investigate the dynamical critical behavior of the two- and three-dimensional Ising model with Glauber dynamics in equilibrium. In contrast to the usual standing, we focus on the mean-squared deviation of the magnetization $M$, MSD$_M$, as a function of time, as well as on the autocorrelation function of $M$. These two functions are distinct but closely related. We find that MSD$_M$ features a first crossover at time $τ_1 \sim L^{z_{1}}$, from ordinary diffusion with MSD$_M$ $\sim t$, to anomalous diffusion with MSD$_M$ $\sim t^α$. Purely on numerical grounds, we obtain the values $z_1=0.45(5)$ and $α=0.752(5)$ for the two-dimensional Ising ferromagnet. Related to this, the magnetization autocorrelation function crosses over from an exponential decay to a stretched-exponential decay. At later times, we find a second crossover at time $τ_2 \sim L^{z_{2}}$. Here, MSD$_M$ saturates to its late-time value $\sim L^{2+γ/ν}$, while the autocorrelation function crosses over from stretched-exponential decay to simple exponential one. We also confirm numerically the value $z_{2}=2.1665(12)$, earlier reported as the single dynamic exponent. Continuity of MSD$_M$ requires that $α(z_{2}-z_{1})=γ/ν-z_1$. We speculate that $z_{1} = 1/2$ and $α= 3/4$, values that indeed lead to the expected $z_{2} = 13/6$ result. A complementary analysis for the three-dimensional Ising model provides the estimates $z_{1} = 1.35(2)$, $α=0.90(2)$, and $z_{2} = 2.032(3)$. While $z_{2}$ has attracted significant attention in the literature, we argue that for all practical purposes $z_{1}$ is more important, as it determines the number of statistically independent measurements during a long simulation.
description: 6 pages, 6 figures, version published in Physical Review E
Fundamental limitations of the eigenvalue continuation approach
Creators: name: Sowiński, Tomasz
name: Garcia-March, Miguel A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Nuclear Theory (nucl-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this work, we show that the eigenvalue continuation approach introduced recently in [Phys. Rev. Lett. {\bf 121}, 032501 (2018)], despite its many advantages, has some fundamental limitations which cannot be overcome when strongly correlated many-body systems are considered. Taking as a working example a very simple system of several fermionic particles confined in a harmonic trap we show that the eigenvector continuation is not able to go beyond the accuracy of the sampling states. We support this observation within a very simple three-level model capturing directly this obstacle. Since mentioned inaccuracy cannot be determined self-consistently within the eigenvalue continuation approach, support from other complementary methods is needed.
description: Authors' version accepted for publication
title: Aktivierung! Oder De-Aktivierung?
title: Intensität und Wirkungen der Aktivierung bei älteren ALG II-Bezieher/innen
titleType: AlternativeTitle
Creators: name: Brussig, Martin
name: Knuth, Matthias
Publisher: name: Lucius & Lucius Verlagsgesellschaft
Year: 2010
Subjects: subject: 300
subject: 650

description: In dem Aufsatz werden die Intensität und die Wirkungen arbeitsmarktpolitischer Aktivierung für ältere ALG II-Bezieher/innen (ab 50 Jahren) im Vergleich zu jüngeren (30 bis 49 Jahre) untersucht. Der Schwerpunkt liegt auf Dienstleistungselementen des Aktivierungsprozesses, wie Beratungsgesprächen, Eingliederungsvereinbarungen und dem Unterbreiten von Jobangeboten. Die Ergebnisse zeigen, dass Ältere deutlich weniger aktiviert werden als Jüngere, und dass die Aktivierung bei Älteren im Unterschied zu Jüngeren kaum mit der Aufnahme einer Beschäftigung oder dem Verlassen des Leistungsbezuges einhergeht.
description: Arbeit
Rotating hematite cube chains
Creators: name: Brics, Mārtiņš
name: Šints, Viesturs
name: Kitenbergs, Guntars
name: Cēbers, Andrejs
Publisher: name: arXiv
Year: 2023
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Recently a two-dimensional chiral fluid was experimentally demonstrated. It was obtained from cubic-shaped hematite colloidal particles placed in a rotating magnetic field. Here we look at building blocks of that fluid, by analyzing short hematite chain behavior in a rotating magnetic field. We find equilibrium structures of chains in static magnetic fields and observe chain dynamics in rotating magnetic fields. We find and experimentally verify that there are three planar motion regimes and one where the cube chain goes out of the plane of the rotating magnetic field. In this regime we observe interesting dynamics -- the chain rotates slower than the rotating magnetic field. In order to catch up with the magnetic field, it rolls on an edge and through rotation in the third dimension catches up with the magnetic field. The same dynamics is also observable for a single cube when gravitational effects are explicitly taken into account.
description: 8 videos in supplementary material
Magnetic support for neutrino-driven explosion of 3D non-rotating core-collapse supernova models
Creators: name: Matsumoto, Jin
name: Asahina, Yuta
name: Takiwaki, Tomoya
name: Kotake, Kei
name: Takahashi, Hiroyuki R.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The impact of the magnetic field on postbounce supernova dynamics of non-rotating stellar cores is studied by performing three-dimensional magnetohydrodynamics simulations with spectral neutrino transport. The explodability of strongly and weakly magnetized models of $20$ and $27$ $M_{\odot}$ pre-supernova progenitors are compared. We find that although the efficiency for the conversion of the neutrino heating into turbulent energy including magnetic fields in the gain region is not significantly different between the strong and weak field models, the amplified magnetic field due to the neutrino-driven convection on large hot bubbles just behind stalled shock results in a faster and more energetic explosion in the strongly magnetized models. In addition, by comparing the difference between the 2nd- and 5th-order spatial accuracy of the simulation in the strong field model for $27$ $M_{\odot}$ progenitor, we also find that the higher order accuracy in space is beneficial to the explosion because it enhances the growth of neutrino-driven convection in the gain region. Based on our results of core-collapse supernova simulations for the non-rotating model, a new possibility for the origin of the magnetic field of the protoneutron star (PNS) is proposed. The magnetic field is accumulated and amplified to magnetar level, that is, $\mathcal{O}(10^{14})$ G, in the convectively stable shell near the PNS surface.
description: 16 pages, 21 figures, accepted for publication in MNRAS
Force-free higher derivative Einstein-Maxwell theory and multi-centered black holes
Creators: name: Hu, Peng-Ju
name: Pang, Yi
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: We investigate which 4-derivative extensions of Einstein-Maxwell theory admit multi-extremal black hole solutions with gravitational force balanced by Coulomb force. We obtain a set of constraints on the 4-derivative couplings by exploring various probe limits in multi-black hole systems. It turns out that these constraints are tighter than those needed to protect the mass-charge ratio of extremal black holes from higher derivative corrections. In fact, they are so strong that the Majumdar-Papapetrou multi-black solutions are unmodified by the force-free combinations of the 4-derivative couplings. Explicit examples of such 4-derivative couplings are given in 4- and 5-spacetime dimensions. Interestingly these include curvature-squared supergravity actions and the quasi-topological $F^4$ term.
description: 34 pages, reproducing curvature-squared supergravity actions in D=5 as well
Rolf Dobischat, hartmut Seifert (Hg.): Lernzeiten neu organisieren. Lebenslanges Lernen durch Integration von Bildung und Arbeit, Forschung aus der Hans-Böckler-Stiftung, Bd. 32, Berlin: edition sigma, 2001, ISBN 3-89404-892-1, 321 S., Euro 18,90
Creators: name: Tippelt, Rudolf
Publisher: name: Lucius & Lucius Verlagsgesellschaft
Year: 2003
Subjects: subject: 300
subject: 650

description: Arbeit
Information Gain as a Tool for Assessing Biosignature Missions
Creators: name: Fields, Benjamin
name: Gupta, Sohom
name: Sandora, McCullen
Publisher: name: arXiv
Year: 2023
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: We propose the mathematical notion of information gain as a way of quantitatively assessing the value of biosignature missions. This makes it simple to determine how mission value depends on design parameters, prior knowledge, and input assumptions. We demonstrate the utility of this framework by applying it to a plethora of case examples: the minimal number of samples needed to determine a trend in the occurrence rate of a signal as a function of an environmental variable, and how much cost should be allocated to each class of object; the relative impact of false positives and false negatives, with applications to Enceladus data and how best to combine two signals; the optimum tradeoff between resolution and coverage in the search for lurkers or other spatially restricted signals, with application to our current state of knowledge for solar system bodies; the best way to deduce a habitability boundary; the optimal amount of money to spend on different mission aspects; when to include an additional instrument on a mission; the optimal mission lifetime; and when to follow/challenge the predictions of a habitability model. In each case, we generate concrete, quantitative recommendations for optimising mission design, mission selection, and/or target selection.
description: 16 pages, 8 figures
Chronic frontal neurobehavioural symptoms in combat-deployed military personnel with and without a history of blast-related mild traumatic brain injury
Creators: name: Parsey, Carolyn M.
name: Kang, Hyun Jin
name: Eaton, Jessica C.
name: McGrath, Margaret E.
name: Barber, Jason
name: Temkin, Nancy R.
name: Mac Donald, Christine L.
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Medicine
subject: Neuroscience
subject: Science Policy
classificationCode: 111714
subject: Mental Health

description: This study evaluated frontal behavioural symptoms, via the FrSBe self-report, in military personnel with and without a history of blast-related mild traumatic brain injury (mild TBI). Prospective observational cohort study of combat-deployed service members leveraging 1-year and 5-year demographic and follow up clinical outcome data. The blast mild TBI group (n = 164) showed greater frontal behavioural symptoms, including clinically elevated apathy, disinhibition, and executive dysfunction, during a 5-year follow-up, compared to a group of combat-deployed controls (n = 107) without mild TBI history or history of blast exposure. We also explored changes inbehaviourall symptoms over a 4-year span, which showed clinically significant increases in disinhibition in the blast mild TBI group, whereas the control group did not show significant increases in symptoms over time. Our findings add to the growing evidence that a proportion of individuals who sustain mild TBI experience persistent behavioural symptoms. We also offer a demonstration of a novel use of the FrSBe as a tool for longitudinal symptom monitoring in a military mild TBI population.
Analyzing Factors Affecting E-Payment Adoption in Ethiopia
Creators: name: Sahlu, Kirubelawit
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2018

description: E-Payment system was introduced in Ethiopia and has been gradually growing as it is no doubt that it has competitive advantage. However, the process of expanding e-payment to replace or minimize cash transactions is yet to achieve its objectives due to various reasons. Hence, for the purpose of analysing factors affecting the adoption of E-payment in Ethiopia, a questionnaire was developed and distributed to cardholders of banks in Ethiopia. From the distributed 384 questionnaire, 339 questionnaires were completed and returned while 331 were usable for the analysis making the questionnaire response rate 86%. The collected data was analysed using SPSS version 21 and hypothesises were tested based on the analysis output. Accordingly the finding of the study show that convenience, attitude, change readiness and perceived behavioural control have significant relationship with e-payment adoption on POS in Ethiopia where the respective hypothesises where accepted. The hypothesis made for perceived risk was also accepted as the finding of the analysis showed that perceived risk has a negative and significant relationship with e-payment on POS in Ethiopia which was in line with the assumption. However, the finding of the study shows that trust and relative advantage have no significant relationship with e-payment adoption on POS in Ethiopia which led to the rejection of their respective hypothesises. The findings of the study are important to banks and other stakeholders of e-payment to identify focus area in their effort to expand point of sale acceptance and enhance adoption of e-payment on POS.
Magnetar-like X-ray Bursts from a Rotation Powered Pulsar, PSR J1119-6127
Creators: name: Gogus, Ersin
name: Lin, Lin
name: Kaneko, Yuki
name: Kouveliotou, Chryssa
name: Watts, Anna L.
name: Chakraborty, Manoneeta
name: Alpar, M. Ali
name: Huppenkothen, Daniela
name: Roberts, Oliver J.
name: Younes, George
name: van der Horst, Alexander J.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Two energetic hard X-ray bursts have recently triggered the Fermi and Swift space observatories from the rotation powered pulsar, PSR J1119-6127. We have performed in depth spectral and temporal analyses of these two events. Our extensive searches in both observatory data for lower luminosity bursts uncovered 10 additional events from the source. We report here on the timing and energetics of the 12 bursts from PSR J1119-6127 during its burst active phase of 2016 July 26 and 28. We also found a spectral softer X-ray flux enhancement in a post burst episode, which shows evidence of cooling. We discuss here the implications of these results on the nature of this unusual high-field radio pulsar, which firmly place it within the typical magnetar population.
description: Revised version, accepted for publication in ApJL. An expanded version of Table 1, as well as the light curves of all Fermi/GBM detected bursts can be found at http://magnetars.sabanciuniv.edu/psrj1119.php
Colossal magnetoresistance in EuZn$_2$P$_2$ and its electronic and magnetic structure
Creators: name: Krebber, Sarah
name: Kopp, Marvin
name: Garg, Charu
name: Kummer, Kurt
name: Sichelschmidt, Jörg
name: Schulz, Susanne
name: Poelchen, Georg
name: Mende, Max
name: Virovets, Alexander V.
name: Warawa, Konstantin
name: Thomson, Mark D.
name: Tarasov, Artem V.
name: Usachov, Dmitry Yu.
name: Vyalikh, Denis V.
name: Roskos, Hartmut G.
name: Müller, Jens
name: Krellner, Cornelius
name: Kliemt, Kristin
Publisher: name: arXiv
Year: 2023
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We investigate single crystals of the trigonal antiferromagnet EuZn$_2$P$_2$ ($P\overline{3}m1$) by means of electrical transport, magnetization measurements, X-ray magnetic scattering, optical reflectivity, angle-resolved photoemission spectroscopy (ARPES) and ab-initio band structure calculations (DFT+U). We find that the electrical resistivity of EuZn$_2$P$_2$ increases strongly upon cooling and can be suppressed in magnetic fields by several orders of magnitude (CMR effect). Resonant magnetic scattering reveals a magnetic ordering vector of $q = (0\, 0\, \frac{1}{2})$, corresponding to an $A$-type antiferromagnetic (AFM) order, below $T_{\rm N} = 23.7\,\rm K$. We find that the moments are canted out of the $a-a$ plane by an angle of about $40^{\circ}\pm 10^{\circ}$ degrees and aligned along the [100] in the $a-a$ plane. We observe nearly isotropic magnetization behavior for low fields and low temperatures which is consistent with the magnetic scattering results. The magnetization measurements show a deviation from the Curie-Weiss behavior below $\approx 150\,\rm K$, the temperature below which also the field dependence of the material's resistivity starts to increase. An analysis of the infrared reflectivity spectrum at $T=295\,\rm K$ allows us to resolve the main phonon bands and intra-/interband transitions, and estimate indirect and direct band gaps of $E_i^{\mathrm{opt}}=0.09\,\rm{eV}$ and $E_d^{\mathrm{opt}}=0.33\,\rm{eV}$, respectively, which are in good agreement with the theoretically predicted ones. The experimental band structure obtained by ARPES is nearly $T$-independent above and below $T_{\rm N}$. The comparison of the theoretical and experimental data shows a weak intermixing of the Eu 4$f$ states close to the $Γ$ point with the bands formed by the phosphorous 3$p$ orbitals leading to an induction of a small magnetic moment at the P sites.
Introspection and the syncopation of euphonious visuality
Creators: name: Walker, David Anthony.
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.
Shadow Thermodynamics of AdS Black Hole with the Nonlinear Electrodynamics Term
Creators: name: Zheng, He-Bin
name: Mou, Ping-Hui
name: Chen, Yun-Xian
name: Li, Guo-Ping
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this paper, we have creatively employed the shadow radius to study the thermodynamics of a charged AdS black hole with a nonlinear electrodynamics(NLED) term. First, the connection between the shadow radius and event horizon is constructed with the aid of the geodesic analysis. It turns out that the black hole shadow radius shows a positive correlation as a function of the event horizon radius. Then in the shadow context, we found that the black hole temperature and heat capacity can be presented by the shadow radius. And further analysis shows that the shadow radius can do as well as the event horizon in revealing black hole phase transition process. In this sense, we constructed the thermal profile of the charged AdS black hole with inclusion of the NLED effect. In P < Pc case, it is found that the N-type trend of the temperature given by the shadow radius is always coincide with that obtained by using the event horizon. So, we can concluded for the charged AdS black hole that the phase transition process can be intuitively presented as the thermal profile in the shadow context. Finally, the effects of NLED have been carefully analysed through out the paper.
description: 17 pages, 21 figures
Nico Stehr: Wissenspolitik. Die Überwachung des Wissens, stw suhrkamp taschenbuch wissenschaft 1615, Franfurt/M.: Suhrkamp Verlag, 2003, ISBN 3-518-29215-3, 328 S., Euro 13,-
Creators: name: Peter, Gerd
Publisher: name: Lucius & Lucius Verlagsgesellschaft
Year: 2003
Subjects: subject: 300
subject: 650

description: Arbeit
Claus J. Tully: Mensch - Maschine - Megabyte. Technik in der Alltagskultur - Eine sozialwissenschaftliche Hinführung, Opladen: Leske + Budrich, 2003, ISBN 3-8100-3204-2, 244 S., Euro 12,90
Creators: name: Spieß, Erika
Publisher: name: Lucius & Lucius Verlagsgesellschaft
Year: 2004
Subjects: subject: 300
subject: 650

description: Arbeit
KuaiRec: A Fully-observed Dataset and Insights for Evaluating Recommender Systems
Creators: name: Gao, Chongming
name: Li, Shijun
name: Lei, Wenqiang
name: Chen, Jiawei
name: Li, Biao
name: Jiang, Peng
name: He, Xiangnan
name: Mao, Jiaxin
name: Chua, Tat-Seng
Publisher: name: arXiv
Year: 2022
Subjects: subject: Information Retrieval (cs.IR)
subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: The progress of recommender systems is hampered mainly by evaluation as it requires real-time interactions between humans and systems, which is too laborious and expensive. This issue is usually approached by utilizing the interaction history to conduct offline evaluation. However, existing datasets of user-item interactions are partially observed, leaving it unclear how and to what extent the missing interactions will influence the evaluation. To answer this question, we collect a fully-observed dataset from Kuaishou's online environment, where almost all 1,411 users have been exposed to all 3,327 items. To the best of our knowledge, this is the first real-world fully-observed data with millions of user-item interactions. With this unique dataset, we conduct a preliminary analysis of how the two factors - data density and exposure bias - affect the evaluation results of multi-round conversational recommendation. Our main discoveries are that the performance ranking of different methods varies with the two factors, and this effect can only be alleviated in certain cases by estimating missing interactions for user simulation. This demonstrates the necessity of the fully-observed dataset. We release the dataset and the pipeline implementation for evaluation at https://kuairec.com
description: CIKM '22 Full Paper
Consistent truncations in higher derivative supergravity
Creators: name: Liu, James T.
name: Saskowski, Robert J.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider the torus reduction of heterotic supergravity in the presence of four-derivative corrections. In particular, the reduction on $T^n$ generically leads to a half-maximal supergravity coupled to $n$ vector multiplets, and we show that it is consistent to truncate out said vector multiplets. This is done by the analysis of both the bosonic equations of motion and the Killing spinor equations. As an application of the consistent truncation, we examine the four-derivative corrected BPS black string that reduces to a black hole in minimal nine-dimensional supergravity.
description: 34 pages; references added
Amtliche Mitteilungen der Universität Dortmund Nr. 47
Creators: name: (:Unkn) Unknown
Publisher: name: Universität Dortmund
Year: 1975
Subjects: subject: 080

description: Änderung der Satzung des Institutes für Raumplanung
description: Umbenennung der Abteilung Fertigungstechnik
description: Verlängerung der Genehmigungsfrist der vorläufigen Diplomprüfungsordnung der Abteilung Elektrotechnik
description: Amtliche Mitteilungen der Universität Dortmund ; 47
Beta-functions of non-linear $σ$-models for disordered and interacting electron systems
Creators: name: Dell'Anna, Luca
Publisher: name: arXiv
Year: 2016
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We provide and study complete sets of one-loop renormalization group equations of several Finkel'stein non-linear $σ$-models, the effective field theories describing the diffusive quantum fluctuations in correlated disordered systems. We consider different cases according to the presence of certain symmetries induced by the original random Hamiltonians, and we show that, for interacting systems, the Cartan's classification of symmetry classes is not enough to uniquely determine their scaling behaviors.
description: 16 pages, 4 figures, final version for the special issue "Many-Body Localization" in Annalen der Physik
Neuroimaging to enhance understanding of cardiovascular autonomic changes associated with mild traumatic brain injury: a scoping review
Creators: name: Thorne, Jacinta
name: Hellewell, Sarah
name: Cowen, Gill
name: Fitzgerald, Melinda
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Medicine
subject: Cell Biology
subject: Neuroscience
subject: Physiology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
classificationCode: 69999
subject: Biological Sciences not elsewhere classified

description: Cardiovascular changes, such as altered heart rate and blood pressure, have been identified in some individuals following mild traumatic brain injury (mTBI) and may be related to disturbances of the autonomic nervous system and cerebral blood flow. We conducted a scoping review according to PRISMA-ScR guidelines across six databases (Medline, CINAHL, Web of Science, PsychInfo, SportDiscus and Google Scholar) to explore literature examining both cardiovascular parameters and neuroimaging modalities following mTBI, with the aim of better understanding the pathophysiological basis of cardiovascular autonomic changes associated with mTBI. Twenty-nine studies were included and two main research approaches emerged from data synthesis. Firstly, more than half the studies used transcranial Doppler ultrasound and found evidence of cerebral blood flow impairments that persisted beyond symptom resolution. Secondly, studies utilizing advanced MRI identified microstructural injury within brain regions responsible for cardiac autonomic function, providing preliminary evidence that cardiovascular autonomic changes are a consequence of injury to these areas. Neuroimaging modalities hold considerable potential to aid understanding of the complex relationship between cardiovascular changes and brain pathophysiology associated with mTBI. However, it is difficult to draw definitive conclusions from the available data due to variability in study methodology and terminology.
Impact of Satellite Trails on H.E.S.S. Astronomical Observations
Creators: name: Lang, Thomas
name: Spencer, Samuel T.
name: Mitchell, Alison M. W.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The number of satellites launched into Earth's orbit has almost tripled in the last three years due to the increasing commercialisation of space. Multiple satellite constellations, consisting of over 400,000 individual satellites, have either been partially launched or are proposed for launch in the near future. Many of these satellites are highly reflective, resulting in a high optical brightness that affects ground-based astronomical observations. Despite this caveat, the potential effect of these satellites on gamma-ray-observing Imaging Atmospheric Cherenkov Telescopes (IACTs) has largely been assumed to be negligible due to their nanosecond-scale integration times. However, this assumption has not been verified to date. As IACTs are sensitive to optical wavelength light, we aim to identify satellite trails in data taken by the High Energy Stereoscopic System (H.E.S.S.) IACT array. In particular, this study is aimed at quantifying the potential effects on data quality and extensive air shower event classification and reconstruction. Using night sky background measurements from H.E.S.S., we determined which observation times and pointing directions are affected most by these satellite trails. We then evaluated their impact on the standard Hillas parameter variables used for event analysis. Due to the brightest trails, false trigger events can occur, however, for most modern analyses, the effect on astronomical results will be minimal. We observe a mild increase in the rate of trail detections over time, which is partially correlated with the number of satellite launches. Overall, the fraction of H.E.S.S. data affected is currently minimal. We note that these trails could still have a non-negligible effect on future Cherenkov Telescope Array observations if advanced analysis techniques designed to lower the energy threshold of the instrument are applied.
description: 11 pages, 14 figures, 5 tables. Replaced with published version. Reproduced with permission from Astronomy & Astrophysics, $\copyright$ ESO
Symbiotic Dynamics in Living Liquid Crystals
Creators: name: Vats, Aditya
name: Yadav, Pradeep Kumar
name: Banerjee, Varsha
name: Puri, Sanjay
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: An amalgamate of nematic liquid crystals and active matter, referred to as living liquid crystals, is a promising self-healing material with futuristic applications for targeted delivery of information and micro-cargo. We provide a phenomenological model to study the symbiotic pattern dynamics in this contemporary system using the Toner-Tu model for active matter (AM), the Landau-de Gennes free energy for liquid crystals (LCs), and an experimentally motivated coupling term that favours co-alignment of the active and nematic components. Our extensive theoretical studies unfold two novel steady states, chimeras and solitons, with sharp regions of distinct orientational order that sweep through the coupled system in synchrony. The induced dynamics in the passive nematic is unprecedented. We show that the symbiotic dynamics of the AM and LC components can be exploited to induce and manipulate order in an otherwise disordered system.
Amtliche Mitteilungen der Universität Dortmund Nr. 15/90
Creators: name: (:Unkn) Unknown
Publisher: name: Universität Dortmund
Year: 1990
Subjects: subject: 080

description: Fachbereichsordnung für den Fachbereich Maschinenbau
description: Amtliche Mitteilungen der Universität Dortmund ; 15, 1990
Search for neutral long-lived particles in $pp$ collisions at $\sqrt{s}=13$ TeV that decay into displaced hadronic jets in the ATLAS calorimeter
Creators: name: ATLAS Collaboration
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: A search for decays of pair-produced neutral long-lived particles (LLPs) is presented using 139 fb$^{-1}$ of proton-proton collision data collected by the ATLAS detector at the LHC in 2015-2018 at a centre-of-mass energy of 13 TeV. Dedicated techniques were developed for the reconstruction of displaced jets produced by LLPs decaying hadronically in the ATLAS hadronic calorimeter. Two search regions are defined for different LLP kinematic regimes. The observed numbers of events are consistent with the expected background, and limits for several benchmark signals are determined. For a SM Higgs boson with a mass of 125 GeV, branching ratios above 10% are excluded at 95% confidence level for values of $c$ times LLP mean proper lifetime in the range between 20 mm and 10 m depending on the model. Upper limits are also set on the cross-section times branching ratio for scalars with a mass of 60 GeV and for masses between 200 GeV and 1 TeV.
description: 47 pages in total, author list starting page 32, 11 figures, 5 tables, published in JHEP06(2022)005. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/EXOT-2019-23
Characterization of mesoscopic turbulent transport events with long-radial-range correlation in DIII-D H-mode plasmas
Creators: name: Hong, R.
name: Rhodes, T. L.
name: Ren, Y.
name: Diamond, P. H.
name: Jian, X.
name: Zeng, L.
name: Barada, K.
name: Yan, Z.
name: McKee, G. R.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: A dimensionless collisionality scan has been performed in H-mode plasmas on DIII-D tokamak, with detailed measurements of intermediate-to-high wavenumber turbulence using Doppler backscattering systems. It is found that the shorter wavelength turbulence develops into spatially asymmetric turbulent structures with a long-radial-range correlation (LRRC) in the mid-radius region of high-collisionality discharges. Linear \textsc{cgyro} simulations indicate that the underlying turbulence is likely driven by the electron-temperature-gradient (ETG) mode. The LRRC transport events are highly intermittent and show a power spectrum of \(S_{\tilde{n}}(k_\perp) \propto k^{-1}_\perp\) for density fluctuations, which is often associated with self-organized criticality. The magnitude and the radial scale of those turbulent structures increase significantly when the $E_{r}\times B$ mean flow shearing rate decreases. The enhanced LRRC transport events appear to be correlated with the degraded energy confinement time. The emergence of such LRRC transport events may serve as a candidate explanation for the degrading nature of \emph{H}-mode core plasma confinement at high collisionality.
Path Counting on Tree-like Graphs with a Single Entropic Trap: Critical Behavior and Finite Size Effects
Creators: name: Gulyaev, Alexey V.
name: Tamm, Mikhail V.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: It is known that maximal entropy random walks and partition functions that count long paths on graphs tend to become localized near nodes with a high degree. Here, we revisit the simplest toy model of such a localization: a regular tree of degree $p$ with one special node ("root") that has a degree different from all the others. We present an in-depth study of the path-counting problem precisely at the localization transition. We study paths that start from the root in both infinite trees and finite, locally tree-like regular random graphs (RRGs). For the infinite tree, we prove that the probability distribution function of the endpoints of the path is a step function. The position of the step moves away from the root at a constant velocity $v=(p-2)/p$. We find the width and asymptotic shape of the distribution in the vicinity of the shock. For a finite RRG, we show that a critical slowdown takes place, and the trajectory length needed to reach the equilibrium distribution is on the order of $\sqrt{N}$ instead of $\log_{p-1}N$ away from the transition. We calculate the exact values of the equilibrium distribution and relaxation length, as well as the shapes of slowly relaxing modes.
description: 15 pager, 8 figures
Sterile neutrino portals to Majorana dark matter: effective operators and UV completions
Creators: name: Coito, Leonardo
name: Faubel, Carlos
name: Herrero-García, Juan
name: Santamaria, Arcadi
name: Titov, Arsenii
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Stringent constraints on the interactions of dark matter with the Standard Model suggest that dark matter does not take part in gauge interactions. In this regard, the possibility of communicating between the visible and dark sectors via gauge singlets seems rather natural. We consider a framework where the dark matter talks to the Standard Model through its coupling to sterile neutrinos, which generate active neutrino masses. We focus on the case of Majorana dark matter, with its relic abundance set by thermal freeze-out through annihilations into sterile neutrinos. We use an effective field theory approach to study the possible sterile neutrino portals to dark matter. We find that both lepton-number-conserving and lepton-number-violating operators are possible, yielding an interesting connection with the Dirac/Majorana character of active neutrinos. In a second step, we open the different operators and outline the possible renormalisable models. We analyse the phenomenology of the most promising ones, including a particular case in which the Majorana mass of the sterile neutrinos is generated radiatively.
description: 33 pages, 8 figures, 5 tables; Sec. 2.2.1 extended; App. A.2 on the departure from kinetic equilibrium between the dark sector and the SM, including two new figures, added; Figs. 2, 4 and 6 updated; several comments and references added; typos corrected; matches version published in JHEP
An overview of a posteriori error estimation and post-processingmethods for nonlinear eigenvalue problems
Creators: name: Dusson, Geneviève
name: Maday, Yvon
Publisher: name: arXiv
Year: 2023
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: In this article, we present an overview of different a posteriori error analysis and postprocessing methods proposed in the context of nonlinear eigenvalue problems, e.g. arising inelectronic structure calculations for the calculation of the ground state and compare them. Weprovide two equivalent error reconstructions based either on a second-order Taylor expansionof the minimized energy, or a first-order expansion of the nonlinear eigenvalue equation. Wethen show how several a posteriori error estimations as well as post-processing methods can beformulated as specific applications of the derived reconstructed errors, and we compare theirrange of applicability as well as numerical cost and precision.
Reality of Superstring Field Theory Action
Creators: name: Sen, Ashoke
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We determine the reality conditions on the string fields that make the action for heterotic and type II string field theories real.
description: LaTeX file, 28 pages; v2: minor clarifications added
Stochastic models of ventilation driven by opposing wind and buoyancy
Creators: name: Andrian, Veronica
name: Craske, John
Publisher: name: arXiv
Year: 2023
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Stochastic versions of a classical model for natural ventilation are proposed and investigated to demonstrate the effect of random fluctuations on stability and predictability. In a stochastic context, the well-known deterministic result that ventilation driven by the competing effects of buoyancy and wind admits multiple steady states can be misleading. With fluctuations in the buoyancy exchanged with an external environment modelled as a Wiener process, such systems tend to reside in the vicinity of global minima of their potential, rather than states associated with metastable equilibria. For a heated space with a leeward low-level and windward high-level opening, sustained buoyancy-driven flow opposing the wind direction is unlikely for wind strengths exceeding a statistically critical value, which is slightly larger than the critical value of the wind strength at which bifurcation in the deterministic system occurs. When fluctuations in the applied wind strength are modelled as an Ornstein-Uhlenbeck process, the topology of the system's potential is effectively modified due to the nonlinear role that wind strength has in the equation for buoyancy conservation. Consequently, large fluctuations in the wind of sufficient duration rule out the possibility of sustained ventilation opposing the wind direction at large base wind strengths.
description: 28 pages, 12 figures. Replacement corrects sign before exponent in equation (46)
Dimensional reduction in Bose-Einstein condensed clouds of atoms confined in tight potentials of any geometry and any interaction strength
Creators: name: Sandin, P.
name: Ögren, M.
name: Gulliksson, M.
name: Smyrnakis, J.
name: Magiropoulos, M.
name: Kavoulakis, G. M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Pattern Formation and Solitons (nlin.PS)
subject: Atomic Physics (physics.atom-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Motivated by numerous experiments on Bose-Einstein condensed atoms which have been performed in tight trapping potentials of various geometries (elongated and/or toroidal/annular), we develop a general method which allows us to reduce the corresponding three-dimensional Gross-Pitaevskii equation for the order parameter into an effectively one-dimensional equation, taking into account the interactions (i.e., treating the width of the transverse profile variationally) and the curvature of the trapping potential. As an application of our model we consider atoms which rotate in a toroidal trapping potential. We evaluate the state of lowest energy for a fixed value of the angular momentum within various approximations of the effectively one-dimensional model and compare our results with the full solution of the three-dimensional problem, thus getting evidence for the accuracy of our model.
Amtliche Mitteilungen der Universität Dortmund Nr. 07/92
Creators: name: (:Unkn) Unknown
Publisher: name: Universität Dortmund
Year: 1992
Subjects: subject: 080

description: Amtlicher Teil: Studienordnung für den Studiengang Sondererziehung und Rehabilitation der Geistigbehinderten an der Universität Dortmund mit dem Abschluß "Erste Staatsprüfung für das Lehramt für Sonderpädagogik" vom 27.03.1992
description: Studienordnung für den Studiengang Sondererziehung und Rehabilitation der Blinden an der Universität Dortmund mit dem Abschluß "Erste Staatsprüfung für das Lehramt für Sonderpädagogik" vom 27.03.1992
description: Studienordnung für den Studiengang Sondererziehung und Rehabilitation der Erziehungsschwierigen an der Universität Dortmund mit dem Abschluß "Erste Staatsprüfung für das Lehramt für Sonderpädagogik" vom 27.03.1992
description: Studienordnung für den Studiengang Sondererziehung und Rehabilitation der Körperbehinderten an der Universität Dortmund mit dem Abschluß "Erste Staatsprüfung für das Lehramt für Sonderpädagogik" vom 27.03.1992
description: Studienordnung für den Studiengang Sondererziehung und Rehabilitation der Lernbehinderten an der Universität Dortmund mit dem Abschluß "Erste Staatsprüfung für das Lehramt für Sonderpädagogik" vom 27.03.1992
description: Studienordnung für den Studiengang Sondererziehung und Rehabilitation der Sehbehinderten an der Universität Dortmund mit dem Abschluß "Erste Staatsprüfung für das Lehramt für Sonderpädagogik" vom 27.03.1992
description: Studienordnung für den Studiengang Sondererziehung und Rehabilitation der Sprachbehinderten an der Universität Dortmund mit dem Abschluß "Erste Staatsprüfung für das Lehramt für Sonderpädagogik" vom 27.03.1992
description: Amtliche Mitteilungen der Universität Dortmund ; 7, 1992