cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Application of synthetic jet arrays for flow separation control on a circular “hump” model
Creators: name: Rona, Aldo
name: Ja’fari, Mohammad
name: Jaworski, Artur J.
Publisher: name: figshare
Year: 2022
Subjects: subject: 90101 Aerodynamics (excl. Hypersonic Aerodynamics)
subject: FOS: Mechanical engineering
subject: 99902 Engineering Instrumentation
subject: FOS: Other engineering and technologies
subject: Mechanical Engineering
subject: Aerospace Engineering
subject: 90507 Transport Engineering
subject: FOS: Civil engineering

description: This research investigates the effectiveness of a spanwise array of synthetic jet actuator (SJA) for the control of boundary layer separation over a circular “hump” model. The influence of geometrical and operational parameters – including actuator position, velocity ratio (i.e., the ratio of the peak exit jet velocity of actuators to the freestream velocity of cross flow, VR) and the actuation waveform – on the flow separation control are investigated using hot-wire anemometry (HWA) and particle image velocimetry (PIV) techniques. The effect of the position of SJA array on flow separation control has been studied experimentally over a considerable length of the hump chord (from the “apex” of the model to near the “trailing edge”) for the first time. The investigation looks in more detail into the mechanisms behind the alleviation of adverse pressure gradient as a key factor controlling the flow separation. Also, investigation of the effect of VR on the performance of SJAs shows the importance of momentum injection in the mitigation of momentum deficiency as another important factor in turbulent boundary layer flow separation. A holistic overview of the control parameters allowed for demonstrating a considerable change in the separation flow patterns. The results show that the best performance of SJA array from the viewpoint of separation control occurs at velocity ratio of 1.85 with reduction of the length of recirculation region around 42.6 and 44.2% by using sine and square wave excitation of SJAs, respectively.
Event-by-event distributions of azimuthal asymmetries in ultrarelativistic heavy-ion collisions
Creators: name: Niemi, H.
name: Denicol, G. S.
name: Holopainen, H.
name: Huovinen, P.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Relativistic dissipative fluid dynamics is a common tool to describe the space-time evolution of the strongly interacting matter created in ultrarelativistic heavy-ion collisions. For a proper comparison to experimental data, fluid-dynamical calculations have to be performed on an event-by-event basis. Therefore, fluid dynamics should be able to reproduce, not only the event-averaged momentum anisotropies, $$, but also their distributions. In this paper, we investigate the event-by-event distributions of the initial-state and momentum anisotropies $ε_n$ and $v_n$, and their correlations. We demonstrate that the event-by-event distributions of relative $v_n$ fluctuations are almost equal to the event-by-event distributions of corresponding $ε_n$ fluctuations, allowing experimental determination of the relative anisotropy fluctuations of the initial state. Furthermore, the correlation $c(v_2,v_4)$ turns out to be sensitive to the viscosity of the fluid providing an additional constraint to the properties of the strongly interacting matter.
gamma Doradus pulsation in two pre-main sequence stars discovered by CoRoT
Creators: name: Zwintz, K.
name: Fossati, L.
name: Ryabchikova, T.
name: Kaiser, A.
name: Gruberbauer, M.
name: Barnes, T. G.
name: Baglin, A.
name: Chaintreuil, S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Pulsations in pre-main sequence stars have been discovered several times within the last years. But nearly all of these pulsators are of delta Scuti-type. gamma Doradus-type pulsation in young stars has been predicted by theory, but lack observational evidence. We present the investigation of variability caused by rotation and (gammaDoradus-type) pulsation in two pre-main sequence members of the young open cluster NGC2264 using high-precision time series photometry from the CoRoT satellite and dedicated high-resolution spectroscopy. Time series photometry of NGC2264VAS20 and NGC 2264VAS87 was obtained by the CoRoT satellite during the dedicated short run SRa01 in March 2008. NGC2264VAS87 was re-observed by CoRoT during the short run SRa05 in December 2011 and January 2012. Frequency analysis was conducted using Period04 and SigSpec. The spectral analysis was performed using equivalent widths and spectral synthesis. The frequency analysis yielded 10 and 14 intrinsic frequencies for NGC2264VAS20 and NGC2264VAS 87, respectively, in the range from 0 to 1.5c/d which are attributed to be caused by a combination of rotation and pulsation. The effective temperatures were derived to be 6380$\pm$150K for NGC2264VAS20 and 6220$\pm$150K for NGC2264VAS87. Membership of the two stars to the cluster is confirmed independently using X-ray fluxes, radial velocity measurements and proper motions available in the literature. The derived Li abundances of log n(Li)=3.34 and 3.54 for NGC2264VAS20 and NGC2264VAS87, respectively, are in agreement with the Li abundance for other stars in NGC2264 of similar Teff reported in the literature. We conclude that the two objects are members of NGC2264 and therefore are in their pre-main sequence evolutionary stage. Assuming that part of their variability is caused by pulsation, these two stars might be the first pre-main sequence gamma Doradus candidates.
description: 11 pages, 10 figures, A&A accepted
Multiplicity and concentration behavior of positive solutions for a Schrodinger-Kirchhoff type problem via penalization method
Creators: name: Figueiredo, Giovany M.
name: Júnior, João R. Santos
Publisher: name: arXiv
Year: 2013
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: In this paper we are concerned with questions of multiplicity and concentration behavior of positive solutions of the elliptic problem $$\left\{\begin{array}{rcl} \mathcal{L}_{\varepsilon}u = f(u) \ \ \mbox{in} \ \ \mathbb{R}^3,\\ u>0 \ \ \mbox{in} \ \ \mathbb{R}^3,\\ u \in H^1 (\mathbb{R}^3), \end{array} \right.$$ where $\varepsilon$ is a small positive parameter, $f:\mathbb{R}\rightarrow \mathbb{R}$ is a continuous function, $\mathcal{L}_{\varepsilon}$ is a nonlocal operator defined by $$ \mathcal{L}_{\varepsilon} u = M \left(\frac{1}{\varepsilon} \int_{\mathbb{R}^3} |\nabla u|^2 + \frac{1}{\varepsilon^3} \int_{\mathbb{R}^3} V(x) u^{2}\right) \left[-\varepsilon^2Δu + V(x)u \right],$$ $M:\mathbb{R}_+\to \mathbb{R}_+$ and $V:\mathbb{R}^3 \to \mathbb{R}$ are continuous functions which verify some hypotheses.
description: 32 pages
Statistical Anisotropy in Inflationary Models with Many Vector Fields and/or Prolonged Anisotropic Expansion
Creators: name: Gomez, L. Gabriel
name: Rodriguez, Yeinzon
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We study the most general contributions due to scalar field perturbations, vector field perturbations, and anisotropic expansion to the generation of statistical anisotropy in the primordial curvature perturbation ζ. Such a study is done using the δN formalism where only linear terms are considered. Here, we consider two specific cases that lead to determine the power spectrum P_ζ(k) of the primordial curvature perturbation. In the first one, we consider the possibility that the n-point correlators of the field perturbations in real space are invariant under rotations in space (statistical isotropy); as a result, we obtain as many levels of statistical anisotropy as vector fields present and, therefore, several preferred directions. The second possibility arises when we consider anisotropic expansion, which leads us to obtain I+a additional contributions to the generation of statistical anisotropy of ζcompared with the former case, being I and a the number of scalar and vector fields involved respectively.
description: LaTex file in Aipproc style, 7 pages, no figures. Prepared for the conference proceedings of the IX Mexican School of the DGFM-SMF: Cosmology for the XXIst Century
title: Visual culture and ‘decoration’ in Iron Age Britain: seeing beyond metal
Creators: name: Downum, Sarah
Publisher: name: University of Reading
Year: 2022

description: Metalwork has completely dominated our view of Iron Age decoration/art. This study, therefore, aims to broaden our study to include ceramics, antler/bone, stone, and wood – to examine the interplay between decoration on those different media and enhance our understanding of Iron Age visual culture. This study asks: What role did decoration serve, and what can it reveal about social connections and visual communication? Did different materials present similar forms of visual expression, and were these used to define Iron Age communities? How did artistic expression change during the later Iron Age and into early Roman Britain? Expanding on previous visual recording methods, this research examines decorated material from three different ‘style zones’ within Southern Britain, from c. 6th century BC to 2nd century AD. The decorated artefacts are compared based on their decoration, material, location, and time period. I argue that similarities and differences in motif selection, based on a general decorative scheme, suggest a level of social interaction and communication, in regard to individual/communal identity, regional allegiance, tradition/resistance, etc., whereby changes within society directly affected the decoration found on different materials, forms, and sites. While different materials and artefact types presented different forms of visual expression, they all played a role in establishing social boundaries, both within and between communities. This is most notably seen during the later Iron Age and early Roman Britain when different decorated materials demonstrated either a return to ‘traditional’ styles or an adoption of new ones. I conclude that the decorative choices present on the different materials act as a visual response to social change, representing a varying interest in resisting or accepting this change, as well as a growing standardization and general accessibility, particularly through the use of non-metalwork which would have reached a wider audience.
title: The relationship between chronic alcohol abuse and information processing ability in older adults
Creators: name: Bertram, Christopher P.
Publisher: name: University of Nevada, Las Vegas
Year: 1997

description: The issue of alcohol use and abuse among older adults is one that is gaining attention in current literature. Although it is an important issue, empirical evidence within the domain of alcohol, aging, and cognition, is sparse. Thus, the proposed preliminary study was designed to examine the relationship between chronic alcohol consumption and information processing speed in older adults. Eight matched participants (4 per group, mean age 56 years) were divided into two groups: Alcoholic or non-alcoholic. Participants were assigned to their respective group and matched based on the information provided on a health questionnaire. All participants completed a series of information processing measures. A 2 (Group) x 3 (Test) ANOVA with repeated measures on the last factor was used to compare reaction times of three separate tests of information processing ability. Unfortunately, the analysis suffered from lack of statistical power. However, data trends strongly suggested a difference between the alcoholic and non-alcoholic participants on all measures of information processing. Further, interactive trends of the data were noted with the alcoholics showing more deficits as a result of the more complex processing requirements. Future suggestions are to continue the work with more participants of more diverse socio-economic status, health, and alcohol behavior, as assessed through the a priori health questionnaire.
On the effect of the Cosmic Microwave Background in high-redshift (sub-)millimeter observations
Creators: name: da Cunha, Elisabete
name: Groves, Brent
name: Walter, Fabian
name: Decarli, Roberto
name: Weiss, Axel
name: Carilli, Chris
name: Daddi, Emanuele
name: Elbaz, David
name: Ivison, Rob
name: Maiolino, Roberto
name: Riechers, Dominik
name: Rix, Hans-Walter
name: Sargent, Mark
name: Smail, Ian
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Modern (sub-)millimeter interferometers enable the measurement of the cool gas and dust emission of high-redshift galaxies (z>5). However, at these redshifts the cosmic microwave background (CMB) temperature is higher, approaching, and even exceeding, the temperature of cold dust and molecular gas observed in the local Universe. In this paper, we discuss the impact of the warmer CMB on (sub-)millimeter observations of high-redshift galaxies. The CMB affects the observed (sub-)millimeter dust continuum and the line emission (e.g. carbon monoxide, CO) in two ways: (i) it provides an additional source of (both dust and gas) heating; and (ii) it is a non-negligible background against which the line and continuum emission are measured. We show that these two competing processes affect the way we interpret the dust and gas properties of high-redshift galaxies using spectral energy distribution models. We quantify these effects and provide correction factors to compute what fraction of the intrinsic dust (and line) emission can be detected against the CMB as a function of frequency, redshift and temperature. We discuss implications on the derived properties of high-redshift galaxies from (sub-)millimeter data. Specifically, the inferred dust and molecular gas masses can be severely underestimated for cold systems if the impact of the CMB is not properly taken into account.
description: 13 pages, 11 figures. Accepted for publication in the Astrophysical Journal
title: Vor- und Frühgeschichte. Die neue Schausammlung
Creators: name: Springer, Tobias
Publisher: name: University Library Heidelberg
Year: 2015

description: KulturGut : aus der Forschung des Germanischen Nationalmuseums, Nr. 11 (2006): KulturGut : aus der Forschung des Germanischen Nationalmuseums, Beginn und Erscheinungsfrequenz: Jahr: 2004
Ground-based near-infrared observations of water vapour in the Venus troposphere
Creators: name: Chamberlain, S.
name: Bailey, J. A.
name: Crisp, D.
name: Meadows, V. S.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: FOS: Physical sciences

description: We present a study of water vapour in the Venus troposphere obtained by modelling specific water vapour absorption bands within the 1.18 μm window. We compare the results with the normal technique of obtaining the abundance by matching the peak of the 1.18 μm window. Ground-based infrared imaging spectroscopy of the night side of Venus was obtained with the Anglo-Australian Telescope and IRIS2 instrument with a spectral resolving power of R ~ 2400. The spectra have been fitted with modelled spectra simulated using the radiative transfer model VSTAR. We find a best fit abundance of 31 ppmv (-6 + 9 ppmv), which is in agreement with recent results by Bézard et al. 2011 using VEX/SPICAV (R ~ 1700) and contrary to prior results by Bézard et al. 2009 of 44 ppmv (+/-9 ppmv) using VEX/VIRTIS-M (R ~ 200) data analyses. Comparison studies are made between water vapour abundances determined from the peak of the 1.18 μm window and abundances determined from different water vapour absorption features within the near infrared window. We find that water vapour abundances determined over the peak of the 1.18 μm window results in plots with less scatter than those of the individual water vapour features and that analyses conducted over some individual water vapour features are more sensitive to variation in water vapour than those over the peak of the 1.18 μm window. No evidence for horizontal spatial variations across the night side of the disk are found within the limits of our data with the exception of a possible small decrease in water vapour from the equator to the north pole. We present spectral ratios that show water vapour absorption from within the lowest 4 km of the Venus atmosphere only, and discuss the possible existence of a decreasing water vapour concentration towards the surface.
title: Viel Silber und ein Hauch von Gold. Die Entstehung einer Goldschmiedearbeit
Creators: name: Schürer, Ralf
Publisher: name: University Library Heidelberg
Year: 2015

description: KulturGut : aus der Forschung des Germanischen Nationalmuseums, Nr. 15 (2007): KulturGut : aus der Forschung des Germanischen Nationalmuseums, Beginn und Erscheinungsfrequenz: Jahr: 2004
The effect of electrically induced strength training on triceps brachii strength
Creators: name: Prince, Kami Nicole
Publisher: name: University of Nevada, Las Vegas
Year: 2000

description: Twenty-seven apparently healthy females volunteered for the study to compare the effects of neuromuscular electrical stimulation (NMES) (N = 7), traditional isotonic weight training (N = 9) and NMES combined with isotonic weight training (N = 11) on triceps branchii strength. Strength was measured isotonically (1-RM) and isometrically (MVIC). The Weight and Weight/NMES groups performed 3 sets of 8 to 10 reps at 60% of 1-RM, 3 times per week. The NMES group received NMES 3 times per week. All groups were pre- and post-tested to determine 1-RM and Mvic Strength was also tested after four weeks, in order to ensure the Weight and NMES/Weight groups were training at a minimum of 60% of 1-RM. Two mixed factor design ANOVAs (Group {dollar}\times{dollar} Time {dollar}\times{dollar} Arm) found no significant difference between groups at pretest (.05). All three groups demonstrated significant increases in strength, both isometrically and isotonically. A statistical difference was not found between the three training methods and their effect on isotonic strength. However, the Weight and the NMES/Weight group demonstrated significantly greater gains in isotonic strength than the NMES group. The NMES/Weight group demonstrated the largest mean increase in strength, followed by the Weight group and the NMES group, respectively. The results indicated that groups NMES/Weight and Weight were equivalent. Therefore, the combination of NMES and isotonic weight training has no greater effect on strength than traditional isotonic training.
SOD1 Exhibits Allosteric Frustration to Facilitate Metal Binding Affinity
Creators: name: Das, Atanu
name: Plotkin, Steven S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Biomolecules (q-bio.BM)
subject: FOS: Biological sciences

description: Superoxide dismutase-1 (SOD1) is a ubiquitous, Cu and Zn binding, free radical defense enzyme whose misfolding and aggregation play a potential key role in amyotrophic lateral sclerosis, an invariably fatal neurodegenerative disease. Over 150 mutations in SOD1 have been identified with a familial form of the disease, but it is presently not clear what unifying features, if any, these mutants share to make them pathogenic. Here, we develop several new computational assays for probing the thermo-mechanical properties of both ALS-associated and rationally-designed SOD1 variants. Allosteric interaction free energies between residues and metals are calculated, and a series of atomic force microscopy experiments are simulated with variable tether positions, to quantify mechanical rigidity "fingerprints" for SOD1 variants. Mechanical fingerprinting studies of a series of C-terminally truncated mutants, along with an analysis of equilibrium dynamic fluctuations while varying native constraints, potential energy change upon mutation, frustratometer analysis, and analysis of the coupling between local frustration and metal binding interactions for a glycine scan of 90 residues together reveal that the apo protein is internally frustrated, that these internal stresses are partially relieved by mutation but at the expense of metal-binding affinity, and that the frustration of a residue is directly related to its role in binding metals. This evidence points to apo SOD1 as a strained intermediate with "self-allostery" for high metal-binding affinity. Thus, the prerequisites for the function of SOD1 as an antioxidant compete with apo state thermo-mechanical stability, increasing the susceptibility of the protein to misfold in the apo state.
description: 7 pages, 5 figures
title: Führerstimme und Wunschkonzert. Zum neu erworbenen „Volksempfänger“ Typ DKE 38
Creators: name: Peters, Ursula
Publisher: name: University Library Heidelberg
Year: 2015

description: KulturGut : aus der Forschung des Germanischen Nationalmuseums, Nr. 15 (2007): KulturGut : aus der Forschung des Germanischen Nationalmuseums, Beginn und Erscheinungsfrequenz: Jahr: 2004
Visitor attitudes and behaviors at a park and recreation setting in their relation to deteriorating environments
Creators: name: Shin, Hong Chul
Publisher: name: University of Nevada, Las Vegas
Year: 2000

description: The purpose of this study was to evaluate attitudes and behaviors of parks and recreation visitors related to environmentally harmful behavior in fragile parks and recreation areas. T-Test and Chi-Square analyses are utilized in finding visitors' attitudes and behaviors. The findings of this study were to provide implications for management in the development of appropriate management actions.
title: Figura serpentinata. Rudolf Bellings „Gruppe Natur“
Creators: name: Franz, Cristopher
Publisher: name: University Library Heidelberg
Year: 2015

description: KulturGut : aus der Forschung des Germanischen Nationalmuseums, Nr. 17 (2008): KulturGut : aus der Forschung des Germanischen Nationalmuseums, Beginn und Erscheinungsfrequenz: Jahr: 2004
The Bearable Lightness of Big Data: Towards Massive Public Datasets in Scientific Machine Learning
Creators: name: Chung, Wai Tong
name: Jung, Ki Sung
name: Chen, Jacqueline H.
name: Ihme, Matthias
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: In general, large datasets enable deep learning models to perform with good accuracy and generalizability. However, massive high-fidelity simulation datasets (from molecular chemistry, astrophysics, computational fluid dynamics (CFD), etc. can be challenging to curate due to dimensionality and storage constraints. Lossy compression algorithms can help mitigate limitations from storage, as long as the overall data fidelity is preserved. To illustrate this point, we demonstrate that deep learning models, trained and tested on data from a petascale CFD simulation, are robust to errors introduced during lossy compression in a semantic segmentation problem. Our results demonstrate that lossy compression algorithms offer a realistic pathway for exposing high-fidelity scientific data to open-source data repositories for building community datasets. In this paper, we outline, construct, and evaluate the requirements for establishing a big data framework, demonstrated at https://blastnet.github.io/, for scientific machine learning.
description: Accepted in ICML 2022 2nd AI for Science Workshop. 10 pages, 8 figures
title: Inhalt / Aktuelle Ausstellungen / Impressum
Creators: name: Redaktion, Die
Publisher: name: University Library Heidelberg
Year: 2015

description: KulturGut : aus der Forschung des Germanischen Nationalmuseums, Nr. 17 (2008): KulturGut : aus der Forschung des Germanischen Nationalmuseums, Beginn und Erscheinungsfrequenz: Jahr: 2004
The effects of animated practice on mental rotation tests
Creators: name: Smith, Russell Winsor
Publisher: name: University of Nevada, Las Vegas
Year: 2000

description: Mental rotation tests have been used to study the underlying process of mental imagery. In an attempt to better understand the nature of mental rotation, this study looked at the effects of practice with using animated feedback. A group with animated feedback, a group with non-animated feedback, and a control group were compared using a pretest-posttest design. The combined practice groups performed significantly better than the control group on both reaction time and accuracy. However, there were no significant differences between the animated and the non-animated groups. The animated group did perform significantly better on the posttest than the control group. There were no significant differences between the non-animated group and the control group. This study contributes to the understanding of the process of mental rotation and provides evidence suggesting that practice with animated feedback can significantly improve scores on tests of mental rotation.
title: Ein 1692 datierter Ziegel aus Höchstadt an der Aisch in den Sammlungen des Germanischen Nationalmuseums
Creators: name: Welker, Manfred
Publisher: name: University Library Heidelberg
Year: 2015

description: KulturGut : aus der Forschung des Germanischen Nationalmuseums, Nr. 20 (2009): KulturGut : aus der Forschung des Germanischen Nationalmuseums, Beginn und Erscheinungsfrequenz: Jahr: 2004
title: Inhalt / Aktuelle Ausstellungen / Impressum
Creators: name: Redaktion, Die
Publisher: name: University Library Heidelberg
Year: 2015

description: KulturGut : aus der Forschung des Germanischen Nationalmuseums, Nr. 22 (2009): KulturGut : aus der Forschung des Germanischen Nationalmuseums, Beginn und Erscheinungsfrequenz: Jahr: 2004
Accessibility to long-term care: A comparison of Fredericton, New Brunswick, Canada and Clark County, Nevada
Creators: name: Quick, Schuyler Van Rensselaer
Publisher: name: University of Nevada, Las Vegas
Year: 2000

description: There has been extensive debate in this country on the ability of the health care system to adequately distribute Long Term Care (LTC) to the elderly. Three perspectives have emerged to explain current problems in access to LTC by the elderly indigent: The Market Model Perspective, Weber's Bureaucratic Perspective, and the Neo-Marxist Perspective. This study will assess these three theories, by examining constraints to accessibility within two systems, Canada and the United States. The LTC delivery service systems of the Fredericton region of New Brunswick and Clark County, Nevada, were examined in the summer and fall of 1992, to ascertain impediments to access as identified by service providers; The research also analyzes the Fredericton region, before and after their enactment of the Single-Entry Point System for LTC. The research is composed of three components: (1) Historical Perspective, (2) Interviews with LTC providers and, (3) Content analysis. Of the three perspectives, the Neo-Marxist Perspective was found to best explain identifiable constraints among the two countries.
Magic frequencies in atom-light interaction for precision probing of the density matrix
Creators: name: Givon, Menachem
name: Margalit, Yair
name: Waxman, Amir
name: David, Tal
name: Groswasser, David
name: Japha, Yonathan
name: Folman, Ron
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: Atomic Physics (physics.atom-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We analyze theoretically and experimentally the existence of a {\it magic frequency} for which the absorption of a linearly polarized light beam by vapor alkali atoms is independent of the population distribution among the Zeeman sub-levels and the angle between the beam and a magnetic field. The phenomenon originates from a peculiar cancelation of the contributions of higher moments of the atomic density matrix, and is described using the Wigner-Eckart theorem and inherent properties of Clebsch-Gordan coefficients. One important application is the robust measurement of the hyperfine population.
Permutation polynomials and systems of permutation polynomials in several variables over finite rings
Creators: name: Starr, Angela Marie
Publisher: name: University of Nevada, Las Vegas
Year: 2000

description: This paper will present the historical development of theorems regarding permutation polynomials in several variables over finite fields. Single variable permutation polynomials will be discussed since they are so important to the discussions which will follow. Theorems involving permutation polynomials and systems of permutation polynomials will also be considered. It will be shown that many of the interesting results obtained for finite fields can be generalized to finite rings.
title: Reaction as image: Comic books and American life, 1940-1955
Creators: name: Bush, William S.
Publisher: name: University of Nevada, Las Vegas
Year: 1997

description: The comic book became a mass medium during a series of defining moments in twentieth-century American history. By telling and retelling narratives of individual achievement during the Great Depression, and tales of patriotism during World War II, comic books gained a popular audience rivaling that of agenda-setting national periodicals such as Life or The Saturday Evening Post. In the first postwar decade, however, publishers experimented with themes of crime, horror, teen romance, and social satire in ways that provoked a wave of public hostility. Crusading psychiatrists, politicians, civic groups, and religious leaders led a campaign against the industry that revealed much about fundamental changes in American society. The extension of postwar prosperity to adolescent consumers was in the process of creating a youth-oriented market culture that would reshape the central traditions of American consensus. Agitation resulted in an investigation of comic books and juvenile delinquency under the auspices of the United States Senate, and the enacting of a strict censorship code that struck controversial images and stories from the pages of comic books. This "containment" of cultural divisions would prove temporary, but it prefigured the conflicts of the following decades.
title: Ein Paravent aus dem 18. Jahrhundert mit der Darstellung der Niagarafälle
Creators: name: Klein, Almuth
Publisher: name: University Library Heidelberg
Year: 2015

description: KulturGut : aus der Forschung des Germanischen Nationalmuseums, Nr. 25 (2010): KulturGut : aus der Forschung des Germanischen Nationalmuseums, Beginn und Erscheinungsfrequenz: Jahr: 2004
title: Ritter-Mohn: Pokal der „Wildensteiner Ritterschaft zur blauen Erde“. Erinnerung an Ritterbünde des langen 19. und frühen 20. Jahrhunderts
Creators: name: Peters, Ursula
Publisher: name: University Library Heidelberg
Year: 2015

description: KulturGut : aus der Forschung des Germanischen Nationalmuseums, Nr. 26 (2010): KulturGut : aus der Forschung des Germanischen Nationalmuseums, Beginn und Erscheinungsfrequenz: Jahr: 2004
title: Adolf Reichs Gemälde „Um Haus und Hof“ und Walter Mehrings „Müller“-Roman
Creators: name: Peters, Ursula
Publisher: name: University Library Heidelberg
Year: 2015

description: KulturGut : aus der Forschung des Germanischen Nationalmuseums, Nr. 28 (2011): KulturGut : aus der Forschung des Germanischen Nationalmuseums, Beginn und Erscheinungsfrequenz: Jahr: 2004
Assessment of some experimental and image analysis factors for background oriented schlieren measurements
Creators: name: Gojani, Ardian B.
name: Obayashi, Shigeru
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Quantitative measurements of fluid flow properties can be achieved by background oriented schlieren. In this paper it is shown that this depends on several factors. Image quality index is used to investigate the influence of the image sensor and the quality of its output. Image evaluation is applied to synthetic images which are treated with a step function, so that they simulate the sharp density jump. The gradual change of the evaluated vector shift revealed the major dependence on the interrogation window, and less so on the background features. BOS applied to shock wave reflection from a wedge in a shock tube gave qualitative results, due to large uncertainties. But, the application to cooling by natural convection gave satisfactory results, comparable to thermocouple data and theory.
Thermo-hydraulic performance of a circular microchannel heat sink using swirl flow and nanofluid
Creators: name: Rona, Aldo
name: Ali, Abdullah
name: Kadhim, Hakim Tarteeb Kadhim
name: Angelino, Matteo
name: Gao, Shian
Publisher: name: figshare
Year: 2022
Subjects: subject: 91502 Computational Heat Transfer
subject: FOS: Other engineering and technologies
subject: 91505 Heat and Mass Transfer Operations
subject: 91501 Computational Fluid Dynamics

description: Increasing the power and reliability of microelectronic components requires heat sinks with greater heat transport performance. This study investigates the hydraulic and heat transport performance of a silicon heat sink under a constant heat flux of 100 W/cm2 with liquid coolant running through parallel microchannels. The coupled heat transfer through the silicon walls and the coolant, modelled as a single-phase fluid, is examined over the Reynolds number range 100 to 350 for micro-channels of circular cross-section, with a straight tape, and with a twisted tape that induces swirl in the flow. Al2O3 nanofluid at nanoparticle volume fractions phi = 0, 1, 2 and 3% is used as the coolant. The microchannel heat sink with swirl flow and with the highest nanoparticle volume fraction concentration provides the lowest thermal resistance and contact temperature. Whilst it has a higher flow resistance than the micro-channel with no tape cooled by pure water, it has a positive trade-off between the gains in cooling performance and in flow resistance. This makes these configurations attractive for designing more performing heat sinks for temperature limited or temperature sensitive micro-electronics.
Elliptic aliquot cycles of fixed length
Creators: name: Jones, Nathan
Publisher: name: arXiv
Year: 2012
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11G05

description: Silverman and Stange define the notion of an aliquot cycle of length L for a fixed elliptic curve E defined over the rational numbers, and conjecture an order of magnitude for the function which counts such aliquot cycles. In the present note, we combine heuristics of Lang-Trotter with those of Koblitz to refine their conjecture to a precise asymptotic formula by specifying the appropriate constant. We give a criterion for positivity of the conjectural constant, as well as some numerical evidence for our conjecture.
description: 28 pages, including 14 pages of data tables
INFORMATION ASYMMETRY AND ITS EFFECT IN THE RESTAURANT INDUSTRY
Creators: name: Gim, Jaehee
Publisher: name: Purdue University Graduate School
Year: 2023
Subjects: Hospitality management

description: In the restaurant industry, information gap between inside management and outside stakeholders could be considerable due to analyst’ lack of interest in the restaurant industry and restaurant firms’ high intangible asset and scant corporate payout. Given the possible seriousness of information asymmetry in the restaurant industry, the subject of information asymmetry could bear great importance in the restaurant industry. Nevertheless, information asymmetry has never been the subject of study in the restaurant industry, not to mention the hospitality industry generally. With this research gap in mind, this study conducted extensive research to understand the various implications of information asymmetry in the restaurant industry. The first objective of this study was to examine the magnitude of information asymmetry in the restaurant industry. This study demonstrated the seriousness of information asymmetry in the restaurant industry by showing that the size of information asymmetry within the restaurant industry is greater than that of other services industries (i.e., utility, REIT, and airline industries). The second objective of this study was to examine the unique determinants of information asymmetry in the restaurant industry. The results of this study showed that in the restaurant industry, information asymmetry widens as the size of accruals increases. Additionally, information asymmetry was found to be smaller for franchise restaurants than for non-franchise restaurants. The third objective of this study was to investigate the impact of information asymmetry on some managerial behaviors in the restaurant industry. This study showed that in the restaurant industry, information asymmetry leads to a manager’s reduced corporate payout and increased investment inefficiency. The last objective of this study was to examine the impact of information asymmetry on firm value in the restaurant industry. By demonstrating a curvilinear relationship between information asymmetry and firm value, this study showed that there exists not only a negative impact of information asymmetry but also a positive impact of information asymmetry on firm value in the restaurant industry. Furthermore, this study showed that the positive impact of information asymmetry on firm value is more prominent for high-leveraged and mature firms than their counterpart groups. This study’s results not only help understand the characteristics of information asymmetry in the restaurant industry but also introduce a new window for understanding managerial behaviors and firm value in the restaurant industry.
A 1.1 to 1.9 GHz SETI Survey of the Kepler Field: I. A Search for Narrow-band Emission from Select Targets
Creators: name: Siemion, Andrew P. V.
name: Demorest, Paul
name: Korpela, Eric
name: Maddalena, Ron J.
name: Werthimer, Dan
name: Cobb, Jeff
name: Howard, Andrew W.
name: Langston, Glen
name: Lebofsky, Matt
name: Marcy, Geoffrey W.
name: Tarter, Jill
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We present a targeted search for narrow-band (< 5 Hz) drifting sinusoidal radio emission from 86 stars in the Kepler field hosting confirmed or candidate exoplanets. Radio emission less than 5 Hz in spectral extent is currently known to only arise from artificial sources. The stars searched were chosen based on the properties of their putative exoplanets, including stars hosting candidates with 380 K > T_eq > 230 K, stars with 5 or more detected candidates or stars with a super-Earth (R_p < 3 R_earth) in a > 50 day orbit. Baseband voltage data across the entire band between 1.1 and 1.9 GHz were recorded at the Robert C. Byrd Green Bank Telescope between Feb--Apr 2011 and subsequently searched offline. No signals of extraterrestrial origin were found. We estimate that fewer than ~1% of transiting exoplanet systems host technological civilizations that are radio loud in narrow-band emission between 1-2 GHz at an equivalent isotropically radiated power (EIRP) of ~1.5 x 10^21 erg s^-1, approximately eight times the peak EIRP of the Arecibo Planetary Radar, and we limit the the number of 1-2 GHz narrow-band-radio-loud Kardashev type II civilizations in the Milky Way to be < 10^-6 M_solar^-1. Here we describe our observations, data reduction procedures and results.
description: Accepted to the Astrophysical Journal
title: Inhalt / Aktuelle Ausstellungen
Creators: name: Redaktion, Die
Publisher: name: University Library Heidelberg
Year: 2015

description: KulturGut : aus der Forschung des Germanischen Nationalmuseums, Nr. 34 (2012): KulturGut : aus der Forschung des Germanischen Nationalmuseums, Beginn und Erscheinungsfrequenz: Jahr: 2004
The 5 GHz Arecibo Search for Radio Flares from Ultracool Dwarfs
Creators: name: Route, Matthew
name: Wolszczan, Alexander
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We present the results of a 4.75 GHz survey of 33 brown dwarfs and one young exoplanetary system for flaring radio emission, conducted with the 305-m Arecibo radio telescope. The goal of this program was to detect and characterize the magnetic fields of objects cooler than spectral type L3.5, the coolest brown dwarf detected prior to our survey. We have also attempted to detect flaring radio emission from the HR 8799 planetary system, guided by theoretical work indicating that hot, massive exoplanets may have strong magnetic fields capable of generating radio emission at GHz frequencies. We have detected and confirmed radio flares from the T6.5 dwarf 2MASS J10475385+2124234. This detection dramatically extends the temperature range over which brown dwarfs appear to be at least sporadic radio-emitters, from ~1900 K (L3.5) down to ~900 K (T6.5). It also demonstrates that the utility of radio detection as a unique tool to study the magnetic fields of substellar objects extends to the coolest dwarfs, and, plausibly to hot, massive exoplanets. We have also identified a single, 3.6 sigma flare from the L1 dwarf, 2MASS J1439284+192915. This detection is tentative and requires confirmation by additional monitoring observations.
description: Accepted for publication in ApJ
THE STUDY AND APPLICATIONS OF PLASMONICS WITH ORDERED AND DISORDERED METASURFACES
Creators: name: Chowdhury, Sarah Nahar
Publisher: name: Purdue University Graduate School
Year: 2023
Subjects: Engineering electromagnetics
Metals and alloy materials
Nanofabrication, growth and self assembly
Nanomaterials
Nanophotonics
Nanoscale characterisation

description: Plasmonics with the capability to harness electromagnetic waves at a nanoscale can be utilized for multitude of applications in ultra-compact miniature optical devices. Plasmonic metasurfaces which are artificially designed sub-wavelength structures have gained unprecedented interest in being able to engineer and effectively modulate the amplitude and phase of the incident wave. Introducing randomness to such plasmonic metasurfaces can also advance possibilities for extraordinary wave manipulation. Hence, by exploiting the plasmonic response of the ordered and disordered metasurfaces, we can design high performance devices for nanoscale optics. Aiming to provide a holistic solution to the current device limitations and bio-compatibility, my research focuses on non-toxic and environment-friendly coloration using plasmonic disordered metasurfaces. These structures generate a broad range of long-lasting colors in reflection that can be applied to real-life artistic or technological applications with a spatial resolution on the order of 0.3 mm or less. Moreover, my research also deals with the possibility of even concentrating energy in the smallest phase-space volume in optics in the form of coherent radiation through designing nanolasers. The study of carrier dynamics and photophysics of the gain media can be extremely beneficial towards the practicability of these lasers. This work elucidates the evolution of different competing mechanisms for coherent lasing. The dynamic study and experimental demonstration of these devices and respective materials can therefore provide a novel aspect to fundamental and applied research.
Restricted reconnaissance: The history and archaeology of S M Wheeler in Nye County, Nevada
Creators: name: Winslow, Diane Lynne
Publisher: name: University of Nevada, Las Vegas
Year: 1989

description: Restricted Reconnaissance: The History and Archaeology of S. M. Wheeler in Nye County, Nevada reconstructs the archaeological career and life of one of Nevada's first archaeologists. Specifically, during the months of February and May of 1940, Wheeler worked in Nye County, Nevada. He conducted survey and collections from 12 archaeological sites which are now within the environs of the Nevada Test Site. The field notes and collections from this fieldwork were analyzed by the author in 1995. In addition, the author revisited the archaeological sites and analyzed the artifact assemblages collected by Wheeler. The results of the analysis and fieldwork will be presented in this thesis.
Global Structure of Five-dimensional BPS Fuzzballs
Creators: name: Gibbons, G. W.
name: Warner, N. P.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We describe and study families of BPS microstate geometries, namely, smooth, horizonless asymptotically-flat solutions to supergravity. We examine these solutions from the perspective of earlier attempts to find solitonic solutions in gravity and show how the microstate geometries circumvent the earlier "No-Go" theorems. In particular, we re-analyse the Smarr formula and show how it must be modified in the presence of non-trivial second homology. This, combined with the supergravity Chern-Simons terms, allows the existence of rich classes of BPS, globally hyperbolic, asymptotically flat, microstate geometries whose spatial topology is the connected sum of N copies of S^2 x S^2 with a "point at infinity" removed. These solutions also exhibit "evanescent ergo-regions," that is, the non-space-like Killing vector guaranteed by supersymmetry is time-like everywhere except on time-like hypersurfaces (ergo-surfaces) where the Killing vector becomes null. As a by-product of our work, we are able to resolve the puzzle of why some regular soliton solutions violate the BPS bound: their spactimes do not admit a spin structure.
description: 55 pages, 2 figures
Electronic shell structure and chemisorption on gold nanoparticles
Creators: name: Larsen, Ask Hjorth
name: Kleis, Jesper
name: Thygesen, Kristian Sommer
name: Nørskov, Jens
name: Jacobsen, Karsten Wedel
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We use density functional theory (DFT) to investigate the electronic structure and chemical properties of gold nanoparticles. Different structural families of clusters are compared. For up to 60 atoms we optimize structures using DFT-based simulated annealing. Cluster geometries are found to distort considerably, creating large band gaps at the Fermi level. For up to 200 atoms we consider structures generated with a simple EMT potential and clusters based on cuboctahedra and icosahedra. All types of cluster geometry exhibit jellium-like electronic shell structure. We calculate adsorption energies of several atoms on the cuboctahedral clusters. Adsorption energies are found to vary abruptly at magic numbers. Using a Newns-Anderson model we find that the effect of magic numbers on adsorption energy can be understood from the location of adsorbate-induced states with respect to the cluster Fermi level.
description: 14 pages, 18 figures
Quasibreathers in MMT model
Creators: name: Pushkarev, A.
name: Zakharov, V. E.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Mathematical Physics (math-ph)
subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We report numerical detection of new type of localized structures in the frame of Majda-McLaughlin-Tabak (MMT) model adjusted for description of essentially nonlinear gravity waves on the surface of ideal deep water. These structures -- quasibreathers, or oscillating quasisolitons -- can be treated as groups of freak waves closely resembling experimentally observed "Three Sisters" wave packs on the ocean surface. The MMT model has quasisolitonic solutions. Unlike NLSE solitons, MMT quasisolitons are permanently backward radiating energy, but nevertheless do exist during thousands of carrier wave periods. Quasisolitons of small amplitude are regular and stable, but large-amplitude ones demonstrate oscillations of amplitude and spectral shape. This effect can be explained by periodic formation of weak collapses, carrying out negligibly small amount of energy. We call oscillating quasisolitons "quasibreathers".