cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
An investigation into a two stage tandem queue for an optimum sawmill design
Creators: name: Zwick, Robert Lewis
Publisher: name: University of British Columbia
Year: 2010

description: The applicability of queueing theory as an operations research tool for modelling sawmills is described. The model selected is a two-stage tandem queue with two stations in the second stage. Each of the stations has general service times and finite buffer storage capacities which create the possibility of blocking pieces coming out of the first stage. A three-variable service time distribution is proposed to model sawmill machinery processing the pieces. This distribution creates the potential to functionally describe the sawmilling process, in contrast to the traditional method of using empirical distributions gathered at an existing sawmill. The literature in tandem queues reveals the lack of work done and the degree of difficulty in this field of study. Analytical solutions do not exist for the queue system studied. Numerical approximation techniques were not used to model the queue system, but they have good potential for being utilized. A simulation study was performed on the queue system. A computer program was written with the intention of obtaining results anticipated in a mathematical analysis. Two separate queue disciplines were studied: saturated and unsaturated first-stage queues. The unsaturated queue investigated the dependency of system performance on the arrival rates. It also examined the operation of the queue under different second-stage arrival intensities. The saturated queue analysis focused on the phenomenon of piece blocking in the first stage. Some conclusions could be made from the simulation study with regards to design procedures for a sawmill. The study showed that in certain cases, improvement to system production by increasing a second-stage machine rate can be comparable to increasing the headrig rate. In addition, two stations in the second stage can complicate the analysis significantly. The simulation study also examined the possibility of utilizing tandem queue analysis to provide solutions for optimum second-stage buffer capacities. The feasibility of modelling sawmills by tandem queues exists, but the designer must choose the appropriate analytical method to use. Numerical approximation techniques would likely prove to be the most successful method. Machine service times should also be studied in a sawmill to establish the statistical nature of the sawmilling process. This will improve the solutions provided by queueing theory analysis.
A Core Mass Function Indistinguishable from the Salpeter Stellar Initial Mass Function Using 1000 au Resolution ALMA Observations
Creators: name: Suárez, Genaro
name: Galván-Madrid, Roberto
name: Aguilar, Luis
name: Ginsburg, Adam
name: Srinivasan, Sundar
name: Liu, Hauyu Baobab
name: Román-Zúñiga, Carlos G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present the core mass function (CMF) of the massive star-forming clump G33.92+0.11 using 1.3 mm observations obtained with the Atacama Large Millimeter/submillimeter Array (ALMA). With a resolution of 1000 au, this is one of the highest resolution CMF measurements to date. The CMF is corrected by flux and number incompleteness to obtain a sample that is complete for gas masses $M\gtrsim2.0\ M_\odot$. The resulting CMF is well represented by a power-law function ($dN/d\log M\propto M^Γ$), whose slope is determined using two different approaches: $i)$ by least-squares fitting of power-law functions to the flux- and number-corrected CMF, and $ii)$ by comparing the observed CMF to simulated samples with similar incompleteness. We provide a prescription to quantify and correct a flattening bias affecting the slope fits in the first approach, which is caused by small-sample or edge effects when the data is represented by either classical histograms or a kernel density estimate, respectively. The resulting slopes from both approaches are in good agreement each other, with $Γ=-1.11_{-0.11}^{+0.12}$ being our adopted value. Although this slope appears to be slightly flatter than the Salpeter slope $Γ=-1.35$ for the stellar initial mass function (IMF), we find from Monte Carlo simulations that the CMF in G33.92+0.11 is statistically indistinguishable from the Salpeter representation of the stellar IMF. Our results are consistent with the idea that the form of the IMF is inherited from the CMF, at least at high masses and when the latter is observed at high-enough resolution.
description: Accepted for publication in ApJ
Thermal denaturation of fluctuating finite DNA chains: the role of bending rigidity in bubble nucleation
Creators: name: Palmeri, John
name: Manghi, Manoel
name: Destainville, Nicolas
Publisher: name: arXiv
Year: 2007
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Statistical DNA models available in the literature are often effective models where the base-pair state only (unbroken or broken) is considered. Because of a decrease by a factor of 30 of the effective bending rigidity of a sequence of broken bonds, or bubble, compared to the double stranded state, the inclusion of the molecular conformational degrees of freedom in a more general mesoscopic model is needed. In this paper we do so by presenting a 1D Ising model, which describes the internal base pair states, coupled to a discrete worm like chain model describing the chain configurations [J. Palmeri, M. Manghi, and N. Destainville, Phys. Rev. Lett. 99, 088103 (2007)]. This coupled model is exactly solved using a transfer matrix technique that presents an analogy with the path integral treatment of a quantum two-state diatomic molecule. When the chain fluctuations are integrated out, the denaturation transition temperature and width emerge naturally as an explicit function of the model parameters of a well defined Hamiltonian, revealing that the transition is driven by the difference in bending (entropy dominated) free energy between bubble and double-stranded segments. The calculated melting curve (fraction of open base pairs) is in good agreement with the experimental melting profile of polydA-polydT. The predicted variation of the mean-square-radius as a function of temperature leads to a coherent novel explanation for the experimentally observed thermal viscosity transition. Finally, the influence of the DNA strand length is studied in detail, underlining the importance of finite size effects, even for DNA made of several thousand base pairs.
description: Latex, 28 pages pdf, 9 figures
Cooling low-dimensional electron systems into the microkelvin regime
Creators: name: Levitin, Lev V.
name: van der Vliet, Harriet
name: Theisen, Terje
name: Dimitriadis, Stefanos
name: Lucas, Marijn
name: Corcoles, Antonio D.
name: Nyéki, Ján
name: Casey, Andrew J.
name: Creeth, Graham
name: Farrer, Ian
name: Ritchie, David A.
name: Nicholls, James T.
name: Saunders, John
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Two-dimensional electron gases (2DEGs) with high mobility, engineered in semiconductor heterostructures host a variety of ordered phases arising from strong correlations, which emerge at sufficiently low temperatures. The 2DEG can be further controlled by surface gates to create quasi-one dimensional systems, with potential spintronic applications. Here we address the long-standing challenge of cooling such electrons to below 1$\,$mK, potentially important for identification of topological phases and spin correlated states. The 2DEG device was immersed in liquid $^3$He, cooled by the nuclear adiabatic demagnetization of copper. The temperature of the 2D electrons was inferred from the electronic noise in a gold wire, connected to the 2DEG by a metallic ohmic contact. With effective screening and filtering, we demonstrate a temperature of 0.9$\,\pm\,$0.1$\,$mK, with scope for significant further improvement. This platform is a key technological step, paving the way to observing new quantum phenomena, and developing new generations of nanoelectronic devices exploiting correlated electron states.
description: 9 pages, 5 figures plus 5 pages of supplementary information
Risk Assessment For Spreadsheet Developments: Choosing Which Models to Audit
Creators: name: Butler, Raymond J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Software Engineering (cs.SE)
subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences
subject: D.1.7; D.2.1; D.2.11; D.3.2; D.3.3; H.4.1; K.6.4; K.8.1

description: Errors in spreadsheet applications and models are alarmingly common (some authorities, with justification cite spreadsheets containing errors as the norm rather than the exception). Faced with this body of evidence, the auditor can be faced with a huge task - the temptation may be to launch code inspections for every spreadsheet in an organisation. This can be very expensive and time-consuming. This paper describes risk assessment based on the "SpACE" audit methodology used by H M Customs & Excise's tax inspectors. This allows the auditor to target resources on the spreadsheets posing the highest risk of error, and justify the deployment of those resources to managers and clients. Since the opposite of audit risk is audit assurance the paper also offers an overview of some elements of good practice in the use of spreadsheets in business.
description: 11 Pages, 1 Figure
The updated SANAE neutron monitor
Creators: name: Strauss, R. D.
name: van der Merwe, C.
name: Diedericks, C.
name: Kruger, H.
name: Kruger, H. G.
name: Moloto, K. D.
name: Lotz, S.
name: Mosotho, G. M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Space Physics (physics.space-ph)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Neutron monitors have been the premier ground-based instruments for monitoring the near-Earth cosmic ray flux for more than 70 years. It is essential to continue with such measurements in order to extend this unique long-term time series. Moreover, with the recent interest of the aviation industry to space weather effects, and especially the radiation risk posed by solar energetic particles and galactic cosmic rays, it is vital to extend the current neutron monitor network in order to provide near-real-time measurements to the space weather community. In this paper we discuss a new electronics system that was retrofitted to the SANAE neutron monitor in Antarctica. We present initial results from this system, featuring very high temporal resolution and discuss the techniques applied to the data analysis. Based on these successful upgrades, we are confident that this system can be used to rejuvenate the aligning neutron monitor network, and even possibly to revive some of the decommissioned instruments.
description: Accepted to Advances in Space Research
Kings without Diadems – How the Laurel Wreath Became the Insignia of Nabataean Kings
Creators: name: Kropp, Andreas J. M.
Publisher: name: Deutsches Archäologisches Institut
Year: 2017
Subjects: subject: client kings
subject: portraiture
subject: numismatics
subject: Nabataean dynasty
subject: royal insignia

description: Archäologischer Anzeiger, 2. Halbband 2013
description: One aspect of Nabataean royal iconography that has long puzzled observers is the change of insignia from Hellenistic royal diadem to laurel wreath. This swap, which is well-illustrated and precisely dated on Nabataean coins, may at first seem a detail of little consequence, but seen in its proper cultural context, it offers a rare glimpse of Nabataean concepts of kingship and of the symbolic value of royal insignia in the Roman empire. While some would interpret the adoption of the laurel wreath, the emblem of a Roman imperator, as a nod towards Rome, an attempt by, say, Aretas IV to flatter and appease Augustus, the switch of insignia must be studied from the other end. What it evokes is another, more significant question that has not been considered so far: Why did Aretas abandon the diadem? How could the chief emblem of royalty worn by virtually every monarch at the Roman frontier, lose its appeal and validity for Aretas? By considering the significance of royal insignia in their proper cultural context, I argue that Aretas’ extraordinary renunciation of the conventional insignia of power was a well-calculated repudiation of the contemporary symbolism to express loyalty and obedience. Beside Nabataean conceptions of kingship, the swap of insignia can therefore also elucidate an aspect of Roman imperialism hitherto neglected, namely the symbolic and ritual language employed by Roman imperial authority in its dealings with foreign subordinate rulers.
The Elastic Spiral Phase Pipe
Creators: name: Chaplain, Gregory J.
name: De Ponti, Jacopo M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: We design a device for the passive mode conversion of guided, axisymmetric, ultrasonic waves in hollow elastic pipes into arbitrary non-axisymmetric flexural waves that have a constant angular profile along the pipe axis. To achieve this we create an elastic analogue to optical spiral phase plates - the elastic spiral phase pipe. Three possible configurations of the elastic spiral phase pipe are presented which allow the efficient generation of non-axisymmetric flexural waves from an axisymmetric, longitudinal forcing. The theory leverages the dispersive nature of the guided elastic waves that are supported in pipes through a defined relative refractive index. As such we include a spectral collocation method used to aid the design of the elastic spiral phase pipe that is corroborated with numerical simulations and then experimentally verified.
description: 34 pages, 10 figures
Sparse Feature Factorization for Recommender Systems with Knowledge Graphs
Creators: name: Anelli, Vito Walter
name: Di Noia, Tommaso
name: Di Sciascio, Eugenio
name: Ferrara, Antonio
name: Mancino, Alberto Carlo Maria
Publisher: name: arXiv
Year: 2021
Subjects: subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: Deep Learning and factorization-based collaborative filtering recommendation models have undoubtedly dominated the scene of recommender systems in recent years. However, despite their outstanding performance, these methods require a training time proportional to the size of the embeddings and it further increases when also side information is considered for the computation of the recommendation list. In fact, in these cases we have that with a large number of high-quality features, the resulting models are more complex and difficult to train. This paper addresses this problem by presenting KGFlex: a sparse factorization approach that grants an even greater degree of expressiveness. To achieve this result, KGFlex analyzes the historical data to understand the dimensions the user decisions depend on (e.g., movie direction, musical genre, nationality of book writer). KGFlex represents each item feature as an embedding and it models user-item interactions as a factorized entropy-driven combination of the item attributes relevant to the user. KGFlex facilitates the training process by letting users update only those relevant features on which they base their decisions. In other words, the user-item prediction is mediated by the user's personal view that considers only relevant features. An extensive experimental evaluation shows the approach's effectiveness, considering the recommendation results' accuracy, diversity, and induced bias. The public implementation of KGFlex is available at https://split.to/kgflex.
A method by which to forecast house prices at the community level : a case study
Creators: name: White, Douglas Arnet
Publisher: name: University of British Columbia
Year: 2010

description: The premise on which this thesis is developed is that it would be desirable for planners in cities such as Vancouver to be able to forecast house prices at the community level. Given advance warning of house price changes, it may be possible to devise policies which would influence trends and be in the best interests of the community and the city at large. The feasibility of making such estimates is the specific focus of this research. The methodology employed involved the selection of nineteen standard economic indicators as provided on a regular basis by Statistics Canada. These indicators were employed as independent variables in numerous multiple regressions wherein the dependent variables used represented the averages of annual assessed values for a sample of single family dwellings within each of the communities of Shaughnessy, Oakridge and East Hastings Sunrise. Observations for these variables were recorded over the period 1962-1980. The hypotheses tested for each of the three communities asserted that all or a subset of the nineteen independent variables would prove to be significantly related to house prices and would yield usefully accurate forecasts of such. Utilizing same year data for the independent and the dependent variables highly significant relationships were apparent and the hypotheses were supported. The hypotheses were also supported when the independent variables were lagged one year to simulate a forecasting situation. The strengths of this methodology include the ease with which the values of the independent variables may be obtained on a relatively current basis and the speed and relative simplicity of computer processing the data. On the other hand, the accuracy of the forecasts during periods of unusual economic change is open to question and criticism. It is apparent that for a model of this kind to perform effectively it is important that the underlying relationships between the forecasting variables and house prices be monitored perhaps on a monthly or quarterly basis.
Dynamical and Statistical Criticality in a Model of Neural Tissue
Creators: name: Magnasco, Marcelo O.
name: Piro, Oreste
name: Cecchi, Guillermo A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Neurons and Cognition (q-bio.NC)
subject: FOS: Biological sciences

description: For the nervous system to work at all, a delicate balance of excitation and inhibition must be achieved. However, when such a balance is sought by global strategies, only few modes remain balanced close to instability, and all other modes are strongly stable. Here we present a simple model of neural tissue in which this balance is sought locally by neurons following `anti-Hebbian' behavior: {\sl all} degrees of freedom achieve a close balance of excitation and inhibition and become "critical" in the dynamical sense. At long timescales, the modes of our model oscillate around the instability line, so an extremely complex "breakout" dynamics ensues in which different modes of the system oscillate between prominence and extinction. We show the system develops various anomalous statistical behaviours and hence becomes self-organized critical in the statistical sense.
Two loop finiteness of Higgs mass and potential in the gauge-Higgs unification
Creators: name: Hosotani, Y.
name: Maru, N.
name: Takenaga, K.
name: Yamashita, Toshifumi
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The zero mode of an extra-dimensional component of gauge potentials serves as a 4D Higgs field in the gauge-Higgs unification. We examine QED on $M^4 \times S^1$ and determine the mass and potential of a 4D Higgs field (the $A_5$ component) at the two loop level with gauge invariant reguralization. It is seen that the mass is free from divergences and independent of the renormalization scheme.
description: 18 pages, 1 figure
Relativistic transport theory for simple fluids at first order in the gradients: a stable picture
Creators: name: Sandoval-Villalbazo, A.
name: Garcia-Perciante, A. L.
name: Garcia-Colin, L. S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this paper we show how using a relativistic kinetic equation the ensuing expression for the heat flux can be casted in the form required by Classical Irreversible Thermodynamics. Indeed, it is linearly related to the temperature and number density gradients and not to the acceleration as the so called \textit{first order in the gradients} theories propose. Since the specific expressions for the transport coefficients are irrelevant for our purposes, the BGK form of the kinetic equation is used. Moreover, from the resulting hydrodynamic equations it is readily seen that the equilibrium state is stable in the presence of the spontaneous fluctuations in the transverse hydrodynamic velocity mode of the simple relativistic fluid. The implications of this result are thoroughly discussed.
description: 9 pages. Accepted in Physica A
Lindemann Criterion and the Anomalous Melting Curve of Sodium
Creators: name: Martinez-Canales, M.
name: Bergara, A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Recent reports of the melting curve of sodium at high pressure have shown that it has a very steep descent after a maximum of around 1000K at 31 GPa. This is not due to a phase transition. According to the Lindemann criterion, this behaviour should be apparent in the evolution of the Debye temperature with pressure. In this work, we have performed an "ab-initio" analysis of the behaviour of both the Debye temperature and the elastic constants up to 102 GPa, and find a clear trend at high pressure that should cause a noticeable effect on the melting curve.
description: 4 pages, 3 figures
Elastic Orbital Angular Momentum
Creators: name: Chaplain, G. J.
name: De Ponti, J. M.
name: Craster, R. V.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We identify that flexural guided elastic waves in elastic pipes carry a well-defined orbital angular momentum associated with the compressional dilatational potential. This enables the transfer of elastic orbital angular momentum, that we numerically demonstrate, through the coupling of the compressional potential in a pipe to the acoustic pressure field in a surrounding fluid in contact with the pipe.
description: 5 pages, 3 figures plus supplemental material
Extracting Angular Diameter Distance and Expansion Rate of the Universe from Two-dimensional Galaxy Power Spectrum at High Redshifts: Baryon Acoustic Oscillation Fitting versus Full Modeling
Creators: name: Shoji, Masatoshi
name: Jeong, Donghui
name: Komatsu, Eiichiro
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a method for extracting the angular diameter distances, $D_A$, and the expansion rates, $H$, of the universe from the {\it two-dimensional} Baryon Acoustic Oscillations (BAO) in the galaxy power spectrum. Our method builds upon the existing algorithm called the "fit-and-extract" (FITEX) method, which allows one to extract only $D_A^2/H$ from a spherically averaged one-dimensional power spectrum. We develop the FITEX-2d method, an extension of the FITEX method, to include the two-dimensional information, which allows us to extract $D_A$ and $H$ simultaneously. We test the FITEX-2d method using the Millennium Simulation as well as simplified Monte Carlo simulations with a bigger volume. The BAOs, however, contain only a limited amount of information. We show that the full modeling, including the overall shape of the power spectrum, yields much better determinations of $D_A$ and $H$, hence the dark energy equation of state parameters such as $w_0$ and $w_a$, than the BAO-only analysis by more than a factor of two, provided that non-linear effects are under control.
description: 14 pages, 8 figures. (v2) Detailed study on the effects of marginalization over the amplitude, redshift space distortion, and the shape of the primordial power spectrum is added. The Fisher matrix code is publicly available at http://gyudon.as.utexas.edu/~komatsu/CRL/index.html The details of the code are presented in Appendix
Emergence of a Quasar Outflow
Creators: name: Hamann, F.
name: Kaplan, K. F.
name: Hidalgo, P. Rodriguez
name: Prochaska, J. X.
name: Herbert-Fort, S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report the first discovery of the emergence of a high-velocity broad-line outflow in a luminous quasar, J105400.40+034801.2 at redshift z ~ 2.1. The outflow is evident in ultraviolet CIV and SiIV absorption lines with velocity shifts v ~ 26,300 km/s and deblended widths FWHM ~ 4000 km/s. These features are marginally strong and broad enough to be considered broad absorption lines (BALs), but their large velocities exclude them from the standard BAL definition. The outflow lines appeared between two observations in the years 2002.18 and 2006.96. A third observation in 2008.48 showed the lines becoming ~40% weaker and 10% to 15% narrower. There is no evidence for acceleration or for any outflow gas at velocities <23,000 km/s. The lines appear to be optically thick, with the absorber covering just 20% of the quasar continuum source. This indicates a characteristic absorber size of ~4 x 10^15 cm, but with a BAL-like total column density log N_H (cm^-2) > 21.2 and average space density n_H > 2 x 10^5 cm^-3. We attribute the emergence of the outflow lines to a substantial flow structure moving across our line of sight, possibly near the ragged edge of the main BAL flow or possibly related to the onset of a BAL evolutionary phase.
description: 5 pages, 2 figures, in press with MNRAS Letters
Alpha Channeling in a Rotating Plasma
Creators: name: Fetterman, Abraham J.
name: Fisch, Nathaniel J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: The wave-particle alpha-channeling effect is generalized to include rotating plasma. Specifically, radio frequency waves can resonate with alpha particles in a mirror machine with ExB rotation to diffuse the alpha particles along constrained paths in phase space. Of major interest is that the alpha-particle energy, in addition to amplifying the RF waves, can directly enhance the rotation energy which in turn provides additional plasma confinement in centrifugal fusion reactors. An ancillary benefit is the rapid removal of alpha particles, which increases the fusion reactivity.
description: 4 pages and 3 figures
The interaction of planetary nebulae and their AGB progenitors with the interstellar medium
Creators: name: Wareing, C. J.
name: Zijlstra, Albert A.
name: O'Brien, T. J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Interaction with the Interstellar Medium (ISM) cannot be ignored in understanding planetary nebula (PN) evolution and shaping. In an effort to understand the range of shapes observed in the outer envelopes of PNe, we have run a comprehensive set of three-dimensional hydrodynamic simulations, from the beginning of the asymptotic giant branch (AGB) superwind phase until the end of the post--AGB/PN phase. A 'triple-wind' model is used, including a slow AGB wind, fast post--AGB wind and third wind reflecting the linear movement through the ISM. A wide range of stellar velocities, mass-loss rates and ISM densities have been considered. We find ISM interaction strongly affects outer PN structures, with the dominant shaping occuring during the AGB phase. The simulations predict four stages of PN--ISM interaction whereby the PN is initially unaffected (1), then limb-brightened in the direction of motion (2), then distorted with the star moving away from the geometric centre (3) and finally so distorted that the object is no longer recognisable as a PN and may not be classed as such (4). Parsec-size shells around PN are predicted to be common. The structure and brightness of ancient PNe is largely determined by the ISM interaction, caused by rebrightening during the second stage; this effect may address the current discrepancies in Galactic PN abundance. The majority of PNe will have tail structures. Evidence for strong interaction is found for all known planetary nebulae in globular clusters.
description: 22 pages, 16 figures, accepted by MNRAS (consists of 14 page journal paper and 8 page online-only appendix). Email C Wareing for high quality PDF version
Archäologische Dissertationen und Habilitationen 2007
Creators: name: Deutsches Archäologisches Institut
Publisher: name: Deutsches Archäologisches Institut
Year: 2017
Subjects: subject: Dissertationen
subject: Habilitationen

description: Archäologischer Anzeiger, 1. Halbband 2008
description: In den Listen aufgeführt sind Dissertationen und Habilitationen, die in den altertumskundlichen Fachgebieten der Prähistorischen, Orientalischen, Klassischen, Provinzialrömischen und Christlichen Archäologie sowie der Bauforschung an den Universitäten in Deutschland, Österreich und der Schweiz entstanden sind. Die Liste beruht auf einer Umfrage des Deutschen Archäologen Verbandes e. V. (; Schriftführer: jens.kamlah@uni-tuebingen.de) und enthält die Arbeiten, die für das Jahr 2007 als abgeschlossen gemeldet wurden.
Archäologische Dissertationen und Habilitationen 2012
Creators: name: Deutsches Archäologisches Institut
Publisher: name: Deutsches Archäologisches Institut
Year: 2017
Subjects: subject: Dissertationen
subject: Habilitationen

description: Archäologischer Anzeiger, 1. Halbband 2013
description: In den Listen aufgeführt sind Dissertationen und Habilitationen, die in den altertumskundlichen Fachgebieten der Prähistorischen, Orientalischen, Klassischen, Provinzialrömischen und Christlichen Archäologie sowie der Bauforschung an den Universitäten in Deutschland, Österreich und der Schweiz entstanden sind. Die Liste beruht auf einer Umfrage des Deutschen Archäologen Verbandes e. V. (www.darv.de; Schriftführer: jens.kamlah@uni-tuebingen.de) und enthält die Arbeiten, die für das Jahr 2012 als abgeschlossen gemeldet wurden.
Archäologische Dissertationen und Habilitationen 2013
Creators: name: Deutsches Archäologisches Institut
Publisher: name: Deutsches Archäologisches Institut
Year: 2017
Subjects: subject: Dissertationen
subject: Habilitationen

description: Archäologischer Anzeiger, 1. Halbband 2014
description: In den Listen aufgeführt sind Dissertationen und Habilitationen, die in den altertumskundlichen Fachgebieten der Prähistorischen, Orientalischen, Klassischen, Provinzialrömischen und Christlichen Archäologie sowie der Bauforschung an den Universitäten in Deutschland, Österreich und der Schweiz entstanden sind. Die Liste beruht auf einer Umfrage des Deutschen Archäologen Verbandes e. V. (; Schriftführer: jens.kamlah@uni-tuebingen. de) und enthält die Arbeiten, die für das Jahr 2013 als abgeschlossen gemeldet wurden.
Casimir forces between cylinders and plates
Creators: name: Rahi, Sahand Jamal
name: Emig, Thorsten
name: Jaffe, Robert L.
name: Kardar, Mehran
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study collective interaction effects that result from the change of free quantum electrodynamic field fluctuations by one- and two-dimensional perfect metal structures. The Casimir interactions in geometries containing plates and cylinders is explicitly computed using partial wave expansions of constrained path integrals. We generalize previously obtained results and provide a more detailed description of the technical aspects of the approach \cite{Emig06}. We find that the interactions involving cylinders have a weak logarithmic dependence on the cylinder radius, reflecting that one-dimensional perturbations are marginally relevant in 4D space-time. For geometries containing two cylinders and one or two plates, we confirm a previously found non-monotonic dependence of the interaction on the object's separations which does not follow from pair-wise summation of two-body forces. Qualitatively, this effect is explained in terms of fluctuating charges and currents and their mirror images.
The Late Bronze Age Hoard of Stephani in Preveza, Epirus, NW Greece
Creators: name: Kleitsas, Christos N.
name: Hofer, Mathias
name: Jung, Reinhard
Publisher: name: Deutsches Archäologisches Institut
Year: 2020
Subjects: subject: Epirus
subject: Stephani
subject: hoard
subject: bronze
subject: analysis

description: Archäologischer Anzeiger, 1. Halbband 2018
description: The hoard of Stephani, a remarkable assemblage, was found in 1985 at the head of the Ambracian gulf in Epirus. It consists of seventeen artefacts: ten bronze double-edged axes, three bronze spearheads (one leaf-shaped), two unidentifiable bronze cylindrical and pointed rods and two large stone tools, probably whetstones. The items of the hoard are mainly dated to the final phases of the Late Bronze Age, when the phenomenon of hoarding has yielded similar depositions in the wider Balkan and European regions. Macroscopic observations on typology, manufacture and other matters are combined with metallographic, chemical and lead isotope analysis. This data is used to explore aspects related to the production or manufacture, consumption or use, recycling or deposition of the items, as well as the trading of artefacts and raw materials. The examination of the hoard of Stephani within the geographical and cultural contexts of Epirus in the Late Bronze Age assists the better comprehension of the social structures of the day and the exchange networks of ideas, products and know-how then in operation.
Trapped Rydberg Ions: From Spin Chains to Fast Quantum Gates
Creators: name: Mueller, M.
name: Liang, L. -M.
name: Lesanovsky, I.
name: Zoller, P.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We study the dynamics of Rydberg ions trapped in a linear Paul trap, and discuss the properties of ionic Rydberg states in the presence of the static and time-dependent electric fields constituting the trap. The interactions in a system of many ions are investigated and coupled equations of the internal electronic states and the external oscillator modes of a linear ion chain are derived. We show that strong dipole-dipole interactions among the ions can be achieved by microwave dressing fields. Using low-angular momentum states with large quantum defect the internal dynamics can be mapped onto an effective spin model of a pair of dressed Rydberg states that describes the dynamics of Rydberg excitations in the ion crystal. We demonstrate that excitation transfer through the ion chain can be achieved on a nanosecond timescale and discuss the implementation of a fast two-qubit gate in the ion chain.
description: 26 pages, 9 figures
Der Hermes Typus Richelieu
Creators: name: Kansteiner, Sascha
Publisher: name: Deutsches Archäologisches Institut
Year: 2019
Subjects: subject: Statuen des Hermes
subject: Umdeutungen
subject: Bildnisträgerkopien
subject: Kopienproduktion

description: Archäologischer Anzeiger, 2. Halbband 2017
description: Ausgangspunkt der hier angestellten Überlegungen ist die Frage, welchen Faktoren der Hermes Typus Richelieu, die berühmteste antike Statue des Hermes, seine Beliebtheit verdankt. Es wird gezeigt, dass weder die Ikonographie der Statue noch ihre Größe oder ihre künstlerische Qualität oder der Name ihres Bildhauers einen entscheidenden Einfluss auf die Quantität der mehr als 300 Jahre währenden Rezeption gehabt haben können. Den Ausschlag für die Verbreitung des statuarischen Typus im ganzen Römischen Reich werden vielmehr Aspekte gegeben haben, die technischer Natur sind: Das Original muss an einem gut zugänglichen Ort – vielleicht in Athen – gestanden haben und dürfte dort immer wieder abgegossen worden sein. Dabei haben die einzelnen Abgüsse offenbar jahrelang derartig häufig als Vorlage fungiert, dass mit den Kopien nicht nur die starke lokale Nachfrage, etwa auf der Peloponnes und im nordgriechischen Raum, problemlos gedeckt werden konnte, sondern auch die überregionale. Das Spektrum der Verwendung des Typus ist einzigartig: Es gibt Kopien, Teilkopien in Form von Büsten und Hermen, Kopien mit Porträtkopf, Kopien mit Porträtkopf und Panzer, thematisch veränderte Kopien und diverse mythologische Umdeutungen.
Same-turn self-repair
Creators: name: Pfeiffer, Martin
name: Mostovaia, Irina
Publisher: name: OSF
Year: 2022
Subjects: Conversation Analysis
Encyclopedia
Ethnomethodology
Interactional Linguistics

description: In same-turn self-repair, speakers interrupt their own emerging turn-constructional unit in order to deal with a problem related to the current turn. Same-turn self-repair can be used by speakers either to retrospectively fix a problem with a part of the turn that they have just produced or to deal with a problem concerning the continuation of the ongoing and not yet completed turn (Schegloff, et al. 1977).
title: The Negotiation Table: Artists' Labor, Cultural Power, and Institutional Accountability
Creators: name: Gao, Jenie
Publisher: name: Emily Carr University of Art and Design
Year: 2023
Subjects: subject: Labor
subject: Political art
subject: Gentrification
subject: Institutional Critique (Art movement)
subject: Ethics
subject: Printmaking
subject: Decolonization

description: “The Negotiation Table” contends with the challenges that arts workers face in building ethical art practices in the context of an exploitative fine arts industry. This paper also acts as a living record of multiple artist-led protests pushing for fair labor practices, cultural representation, and institutional accountability.

The arts industry is structurally designed to rely on unpaid artists’ labor, which is further weaponized to gentrify cities. Marginalized artists must contend with a two-fold problem: there is a dire need for our work to exist, and the systems around us readily prey upon what we create. In response to these problems, I enter my work with the questions: Whom will this work benefit? What role will it play in the surrounding ecosystem? How can individual changes inform collective action, and how can collective action lead to institutional accountability and transformation?

I have created a new body of work, which I call my Negotiation Tables. My methodology involves taking hand-carved woodblocks and transforming them into sites of negotiation. This transformation is in response to the history of how print became indoctrinated in the fine arts, in contrast to its use in political campaigning, protest, and community activation. Working through my methodologies, I reflect on what it means for me to challenge print, as a Taiwanese-Chinese American and woman of color who has been made artificially rare in white dominant spaces.

I have centered my research on the act of negotiation, and the critical transformation in my work is about how we, as artists and arts professionals, move away from an industry based in artificial rarity to one of abundance.
The Grotta di Matermania on Capri. Construction, Space and Atmosphere of an Imperial Pavilion
Creators: name: Busen, Tobias
name: Grüner, Andreas
Publisher: name: Deutsches Archäologisches Institut
Year: 2020
Subjects: subject: imperial residence
subject: Roman villa
subject: nature
subject: architectural desgin
subject: grotto-nymphaeum

description: Archäologischer Anzeiger, 1. Halbband 2018
description: The Grotta di Matermania on the island of Capri was most probably created by one of the first Roman emperors as a monumental framing device for the imperial cena, representing one of several architectural interventions on the island residence. Features of nature and architecture were combined in this grotto by contrasting the wilderness of the natural setting and the heterogeneous rocky surfaces with the precise geometry of the architectural forms. This effect was achieved by taking into account the differing temperature, light, and shadow as well as by applying opus sectile floors and glass and sea-shell wall coverings. For the architect it must have been especially appealing to fit a convincing architectural design based on the rules of proportions into the existing physical boundary of the grotto.
A Stellar Dynamical Measurement of the Black Hole Mass in the Maser Galaxy NGC 4258
Creators: name: Siopis, Christos
name: Gebhardt, Karl
name: Lauer, Tod R.
name: Kormendy, John
name: Pinkney, Jason
name: Richstone, Douglas
name: Faber, S. M.
name: Tremaine, Scott
name: Aller, M. C.
name: Bender, Ralf
name: Bower, Gary
name: Dressler, Alan
name: Filippenko, Alexei V.
name: Green, Richard
name: Ho, Luis C.
name: Magorrian, John
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We determine the mass of the black hole at the center of the spiral galaxy NGC 4258 by constructing axisymmetric dynamical models of the galaxy. These models are constrained by high spatial resolution imaging and long-slit spectroscopy of the nuclear region obtained with the {\em Hubble Space Telescope}, complemented by ground-based observations extending to larger radii. Our best mass estimate is $\MBH = (3.3 \pm 0.2) \times 10^7 \MSun $ for a distance of 7.28 Mpc (statistical errors only). This is within 15% of $ (3.82\pm 0.01) \times 10^7 \MSun$, the mass determined from the kinematics of water masers (rescaled to the same distance) assuming they are in Keplerian rotation in a warped disk. The construction of accurate dynamical models of NGC 4258 is somewhat compromised by an unresolved active nucleus and color gradients, the latter caused by variations in the stellar population and/or obscuring dust. These problems are not present in the $\sim 30$ other black hole mass determinations from stellar dynamics that have been published by us and other groups; thus, the relatively close agreement between the stellar dynamical mass and the maser mass in NGC 4258 enhances our confidence in the black hole masses determined in other galaxies from stellar dynamics using similar methods and data of comparable quality.
description: 58 pages, submitted to ApJ. Some figures excluded due to size. The entire paper is at http://www.noao.edu/noao/staff/lauer/nuker_papers.html
The acute effects of aerobic exercise on cigarette smoking
Creators: name: Mikhail, Carmen
Publisher: name: University of British Columbia
Year: 2010

description: The effects of two intensities of exercise and a no-exercise control condition on cigarette smoking were investigated in 18 men, aged 20 to 30 years. Each subject, who was blind to the purpose of the study, came to the laboratory at the same time on three consecutive days to pedal a stationary bicycle at a work-load sufficient to maintain a heart rate between 130-135 b.p.m. or 160-165 b.p.m. or to be monitored while seated in a chair, for 10 minutes. Each subject was then ushered into a waiting room where he remained for one hour while indices of smoking behavior including number and weight of cigarettes consumed, cigarette duration (time elapsed from the instance the cigarette was lit to the instance it was extinguished) and number of puffs taken for the first cigarette post-exercise were surreptitiously observed by a confederate. Subjects also self-monitored cigarette intake during the three days of the study. Urine samples were collected pre- and 15 and 64 minutes following exercise. The only smoking measure found to be significantly affected by exercise was cigarette duration, which was inversely related to exercise intensity. Additional analyses revealed that high-intensity exercise significantly acidified the urine, and that a significant inverse correlation existed between urinary pH change and cigarette duration for this condition. The implications of this finding are discussed in regard to Schachter's hypothesis of nicotine addiction.
Search for neutrino non-standard interactions with ANTARES and KM3NeT-ORCA
Creators: name: Rey, J. J. Hernández
name: Chowdhury, N. R. Khan
name: Manczak, J.
name: Navas, S.
name: Zornoza, J. D.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Non-standard interactions (NSIs) in the propagation of neutrinos in matter can lead to significant deviations in neutrino oscillations expected within the standard 3-neutrino framework. These additional interactions would result in an anomalous flux of neutrinos observable at neutrino telescopes. The ANTARES detector and its next-generation successor, KM3NeT, located in the abyss of the Mediterranean Sea, have the potential to measure sub-dominant effects in neutrino oscillations, coming from non-standard neutrino interactions. In this contribution, a likelihood-based search for NSIs with 10 years of atmospheric muon-neutrino data recorded with ANTARES is reported and sensitivity projections for KM3NeT/ORCA, based on realistic detector simulations, are shown. The bounds obtained with ANTARES in the NSI $μ- τ$ sector constitute the most stringent limits up to date.
Athenian Use of Black-figure Lekythoi in Fifthcentury Burials
Creators: name: Brendle, Ross
Publisher: name: Deutsches Archäologisches Institut
Year: 2020
Subjects: subject: Classical period
subject: Attic black-figure
subject: lekythoi
subject: Kerameikos
subject: grave goods

description: Archäologischer Anzeiger, 1. Halbband 2018
description: This article re-evaluates the use and significance of funerary lekythoi in fifth-century Athens by considering in the first instance vases found in Athenian burial contexts. From the contextualized material it is clear that black-figure lekythoi remain prominent in Athenian burial practice through the first half of the fifth century. Their use then declines but does not wholly cease until the end of the century. Hastily-painted late black-figure lekythoi are by far the most common type of vase in Athenian burials throughout the fifth century and are found in simple burials and well-furnished tombs alike. The black-figure technique carried a meaning in itself, the importance of which outweighed other factors for the users of these vases.
Interferometric control of nanorotor alignment
Creators: name: Schrinski, Birthe
name: Stickler, Benjamin A.
name: Hornberger, Klaus
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The intrinsically non-linear rotation dynamics of rigid bodies offer unprecedented ways to exploit their quantum motion. In this Letter we devise a rotational analog of Mach-Zehnder interferometry, which allows steering symmetric rotors from fully aligned to completely antialigned. The scheme uses a superposition of four distinct orientations, emerging at the eighth of the quantum revival time, whose interference can be controlled by a weak laser pulse. We develop a semiclassical model of the effect and demonstrate that it persists even in presence of imperfections and decoherence.
description: 6 pages, 2 figures; corresponds to published version