cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Spin Evolution of Supermassive Black Holes and Galactic Nuclei
Creators: name: Merritt, David
name: Vasiliev, Eugene
Publisher: name: arXiv
Year: 2012
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The spin angular momentum S of a supermassive black hole (SBH) precesses due to torques from orbiting stars, and the stellar orbits precess due to dragging of inertial frames by the spinning hole. We solve the coupled post-Newtonian equations describing the joint evolution of S and the stellar angular momenta Lj, j = 1...N in spherical, rotating nuclear star clusters. In the absence of gravitational interactions between the stars, two evolutionary modes are found: (1) nearly uniform precession of S about the total angular momentum vector of the system; (2) damped precession, leading, in less than one precessional period, to alignment of S with the angular momentum of the rotating cluster. Beyond a certain distance from the SBH, the time scale for angular momentum changes due to gravitational encounters between the stars is shorter than spin-orbit precession times. We present a model, based on the Ornstein-Uhlenbeck equation, for the stochastic evolution of star clusters due to gravitational encounters and use it to evaluate the evolution of S in nuclei where changes in the Lj are due to frame dragging close to the SBH and to encounters farther out. Long-term evolution in this case is well described as uniform precession of the SBH about the cluster's rotational axis, with an increasingly important stochastic contribution when SBH masses are small. Spin precessional periods are predicted to be strongly dependent on nuclear properties, but typical values are 10-100 Myr for low-mass SBHs in dense nuclei, 100 Myr - 10 Gyr for intermediate mass SBHs, and > 10 Gyr for the most massive SBHs. We compare the evolution of SBH spins in stellar nuclei to the case of torquing by an inclined, gaseous accretion disk.
description: 25 pages
Elucidating factors to improve biological control of Halyomorpha halys by egg parasitoids
Creators: name: Potter, Madeline Elizabeth
Publisher: name: Digital Repository at the University of Maryland
Year: 2023
Subjects: subject: Entomology
subject: Environmental management
subject: Biology
subject: Anastatus
subject: Biological control
subject: Brown marmorated stink bug
subject: Conservation
subject: Parasitoid
subject: Pest management

description: Halyomorpha halys Stål (Hemiptera: Pentatomidae), also known as the brown marmorated stink bug, is an invasive species from Northeast Asia, which has now spread to 47 USA states and invaded several other countries. In the USA, H. halys is an economically important pest of fruit, vegetable, field, and nut crops, and it feeds on ornamental plants. A sustainable means of controlling this pest is needed. Here I focus on elucidating features from bottom-up forces (alternate host identity, host plant identity, and habitat type) which may influence top-down forces such as parasitism by H. haly’s key natural enemies, Hymenoptera egg parasitoids. Naturally laid eggs of insects were collected from a tree nursery in 2020 and from diverse habitats throughout Maryland in 2021 to investigate H. halys parasitoids’ alternate insect egg hosts, host plant and habitat associations, and which factor(s) (host plant identity and/or host egg identity) are important to egg mass discovery, or to egg parasitism rate. Effects of host insect feeding guild (herbivore vs predator) and host plant origin (native vs non-native) on parasitism were also examined. One new overwintering insect host and four new in season hosts for Anastatus spp., and five new in season hosts for Telenomus cristatus were found. A diverse array of plant species, particularly native Acer and Quercus species, were found to support alternate host insects. Halyomorpha halys related parasitoids were reared from eggs collected in all habitat types. Host egg order and egg feeding guild affected Anastatus spp. egg unit discovery efficiency and egg parasitism rate. Host plant identity and plant origin affected egg unit discovery efficiency and egg parasitism rate by all H. halys parasitoids. These findings support the importance of having a diverse community of alternate prey and informed plant selections to support parasitoids and their biological control of H. halys and other insect pests.
Flow Measurements in Two Cambered Vane Diffusers with Different Passage Widths
Creators: name: Stein, W.
name: Rautenberg, M.
Publisher: name: Berlin : De Gruyter
Year: 1987
Subjects: subject: Flow Measurement
subject: Diffuser
subject: Vane
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: To investigate the influence of the vaneless space between impeller exit and the diffuser vanes, detailed flow measurements in two diffusers with the same vane geometry but different passage width are compared. The three—dimensional character of the flow changes between impeller exit and the entry to the two dimensional vanes depending on the shape of the shroud. After initial measurements with a constant area vaneless space, the width of the vaned diffuser was later on reduced by 10%. The compressor maps show an increase in overall pressure rise and efficiency with the width reduction. To get further details of the flow field, measurements of the static pressure distribution at hub and shroud have been performed at several operation points for both diffusers. At the same points the flow angle and total pressure distribution between hub and shroud upstream and downstream of the vanes have been measured with probes. The maximum efficiency of the narrow diffuser is nearly 2% higher than for the wide diffuser. The measurements give further details to explain these improvements. © Freund Publishing House Ltd.
Notes on soft breaking of BRST symmetry in the Batalin-Vilkovisky formalism
Creators: name: Radchenko, Olga V.
name: Reshetnyak, Alexander A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We have proved the nilpotency of the operators which describe the gauge dependence of the generating functionals of Green's functions for the gauge theories with the soft breaking of BRST symmetry in the Batalin-Vilkovisky formalism.
description: 1+6 pages
Effectiveness of Interventions in Reducing Substance-Related Stigma: A Systematic Review and Meta-Analysis of Randomized Controlled Trials
Creators: name: Gür, Ganime Can
name: Yılmaz, Emine
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biotechnology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Cancer
subject: Science Policy

description: The purpose of this study was to undertake a quantitative analysis to determine the effectiveness of interventions designed in reducing different types of stigma (self-stigma, social stigma, and structural stigma) for the substance use. This study followed the Cochrane Handbook for Systematic Reviews of Interventions guideline. This study followed the Cochrane Handbook for Systematic Reviews of Interventions guideline. Systematic searches were conducted in PubMed, Science Direct, Web of Science, Scopus, and MEDLINE. These electronic databases were searched research published in English from date of their inception to July 15, 2021. Randomized controlled trials that evaluated interventions on stigma associated with substance use were included. Studies should include at least one stigma outcome involving self-stigma, social stigma, or structural stigmatization. Ten randomized controlled studies were included. The overall Hedges’g for the interventions’ impact on reducing stigma was 0.301, 95%CI = [-0.154- 0.755], p = 0.195, that there was no statistically significant difference. However, the meta-analysis showed that interventions had no significant impact on self-stigma [0.682, 95% CI=(-0.015-1.380), p = 0.055] and social stigma [0.198, 95% CI=(-1.271-0.876), p = 0.718] but had a small but significant impact in favor of the experimental group on reducing structural stigma [0.360 (95% CI= 0.156-0.564), p = 0.00]. According to subgroup analyses, there was no difference in the effects of stigma according to the type of intervention, the number of sessions, or the type of group. The interventions for reducing stigma related to substance use are promising. It seems to have a small but significant positive impact on structural stigma.
Studi Gregoriani per la storia della »Libertas Ecclesiae«. Vol. XIV: A. M. Stickler, O. Capitani, H. Fuhrmann, M. Maccarrone, R. Schieffer, R. Volpini (Hg.), La riforma gregoriana e l'Europa, Congresso internazionale Salerno, 20–25 maggio 1985, II. Comunicazioni, 1991
Creators: name: Becker, Alfons
Publisher: name: Francia
Year: 2019

description: -
description: Francia, Bd. 21, Nr. 1 (1994)
A Neuro-Fuzzy Technique for Implementing the Half-Adder Circuit Using the CANFIS Model
Creators: name: Lakra, Sachin
name: Prasad, T. V.
name: Sharma, Deepak
name: Atrey, Shree Harsh
name: Sharma, Anubhav
Publisher: name: arXiv
Year: 2012
Subjects: subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Computer and information sciences

description: A Neural Network, in general, is not considered to be a good solver of mathematical and binary arithmetic problems. However, networks have been developed for such problems as the XOR circuit. This paper presents a technique for the implementation of the Half-adder circuit using the CoActive Neuro-Fuzzy Inference System (CANFIS) Model and attempts to solve the problem using the NeuroSolutions 5 Simulator. The paper gives the experimental results along with the interpretations and possible applications of the technique.
description: 7 pages, 9 figures, 7 tables
Pion photoproduction off the proton in a gauge-invariant chiral unitary framework
Creators: name: Mai, Maxim
name: Bruns, Peter C.
name: Meissner, Ulf-G.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate pion photoproduction off the proton in a manifestly gauge-invariant chiral unitary extension of chiral perturbation theory. In a first step, we consider meson-baryon scattering taking into account all next-to-leading order contact interactions. The resulting low-energy constants are determined by a fit to s-wave pion-nucleon scattering and the low-energy data for the reaction pi- p --> eta n. To assess the theoretical uncertainty, we perform two different fit strategies. Having determined the low-energy constants, we then analyse the data on the s-wave multipole amplitudes E0+ of pion and eta photoproduction. These are parameter-free predictions, as the two new low-energy constants are determined by the neutron and proton magnetic moments.
description: 23 pages, 17 figures
Confessions
Creators: name: Hansen, Katherine Robbie
Publisher: name: Digital Repository at the University of Maryland
Year: 2023
Subjects: subject: Creative writing

description: This is a collection of magical women doing bad things. There are six stories narrated by six women. These women are: Louise, a woman cursed with the knowledge of when her husband will leave her; Joy and Amity, two young sisters struggling with their roles in their uncle’s small-town drug business; Lisi, a new mother who has been separated from her body; Flossie, a woman whose jealousy manifests itself in the mysterious and supernatural deaths of those around her; Clara, a conservatory musician confronted with the sudden disappearance of her girlfriend; and Ruth, a lost daughter who finds everything she wants in a magic powder which returns the skin to youth. Their tales are strange and otherworldly, occurring in planes beyond comprehension and control. The women narrate; their words always are their own.
Codebuch zur Studie «Die Qualität der Medienberichterstattung zur Corona-Pandemie»
Creators: name: Oehmer, Franziska
name: Eisenegger, Mark
name: Udris, Linards
name: Vogler, Daniel
Publisher: name: Zenodo
Year: 2020
Subjects: Codebook
Quantitative Content Analysis
Media Quality

description: Die Datei enthält das Codebuch für die quanitative Inhaltsanalyse zur Studie «Die Qualität der Medienberichterstattung zur Corona-Pandemie».
Additional file 9 of RNA sequencing reveals the expression profiles of circRNA and identifies a four-circRNA signature acts as a prognostic marker in esophageal squamous cell carcinoma
Creators: name: Wang, Weiwei
name: Zhu, Di
name: Zhao, Zhihua
name: Sun, Miaomiao
name: Wang, Feng
name: Li, Wencai
name: Zhang, Jianying
name: Jiang, Guozhong
Publisher: name: figshare
Year: 2021
Subjects: subject: Biophysics
subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Biological Sciences not elsewhere classified
subject: Mathematical Sciences not elsewhere classified
subject: Cancer
subject: Virology

description: Additional file 9: Table S5. Association of the circRNA signature with clinicopathological characteristics in ESCC patients.
On Vertices of Degree n in Minimally n-Edge-Connected Graphs
Creators: name: Mader, W.
Publisher: name: Cambridge : Cambridge University Press
Year: 1995
Subjects: subject: Finite Simple Graph
subject: Vertices
subject: n-connected Graph
subject: Dewey Decimal Classification::500 | Naturwissenschaften::510 | Mathematik

description: Let G be a minimally n-edge-connected finite simple graph with vertex number |G| ≥ 2n + 2 + [3/n] and let n ≥ 3 be odd. It is proved that the number of vertices of degree n in G is at least ((n − 1 − ∈n)/(2n + 1))|G| + 2 + 2∈n, where ∈n = (3n + 3)/(2n2 − 3n − 3), and that for every n ≡ 3 (mod 4) this lower bound is attained by infinitely many minimally n-edge-connected finite simple graphs. © 1995, Cambridge University Press. All rights reserved.
Why there is a difference between optimal doping for maximal Tc and critical doping for highest ρ_s in cuprate superconductors?
Creators: name: Huang, Zheyu
name: Zhao, Huaisong
name: Feng, Shiping
Publisher: name: arXiv
Year: 2012
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: A long-standing puzzle is why there is a difference between the optimal doping δ_{optimal}=0.15 for the maximal superconducting (SC) transition temperature Tc and the critical doping δ_{critical}=0.19 for the highest superfluid density ρ_s in cuprate superconductors? This puzzle is calling for an explanation. Within the kinetic energy driven SC mechanism, it is shown that except the quasiparticle coherence, ρ_s is dominated by the bare pair gap, while Tc is set by the effective pair gap. By calculation of the ratio of the effective and the bare pair gaps, it is shown that the coupling strength decreases with increasing doping. This doping dependence of the coupling strength induces a shift from the critical doping for the maximal value of the bare pair gap parameter to the optimal doping for the maximal value of the effective pair gap parameter, which leads to a difference between the optimal doping for the maximal Tc and the critical doping for the highest ρ_s.
description: 5 pages, 4 figures
Radio-frequency association of heteronuclear Feshbach molecules
Creators: name: Klempt, Carsten
name: Henninger, T.
name: Topic, O.
name: Scherer, M.
name: Kattner, L.
name: Tiemann, E.
name: Ertmer, Wolfgang
name: Arlt, Jan J.
Publisher: name: College Park : American Physical Society
Year: 2008
Subjects: subject: Analytical models
subject: Bound molecules
subject: Feshbach molecules
subject: Harmonic traps
subject: Heteronuclear
subject: Molecule associations
subject: Production efficiencies
subject: Production rates
subject: Quantitative agreements
subject: Radio frequencies
subject: gas
subject: temperatures
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We present a detailed analysis of the production efficiency of weakly bound heteronuclear (40)K(87)Rb Feshbach molecules using radio-frequency association in a harmonic trap. The efficiency was measured in a wide range of temperatures, binding energies, and radio frequencies. A comprehensive analytical model is presented, explaining the observed asymmetric spectra and achieving good quantitative agreement with the measured production rates. This model provides a deep understanding of the molecule association process and paves the way for future experiments which rely on Feshbach molecules, e.g., for the production of deeply bound molecules.
“By The Way, Meet Vera Stark”: An Exploration of Process, Film, and Collaboration
Creators: name: Collins, Deja
Publisher: name: Digital Repository at the University of Maryland
Year: 2023
Subjects: subject: Theater
subject: Media Design
subject: Projection Design
subject: Theatre
subject: Vera Stark

description: The following thesis documents my design process and the discoveries I made as the projection designer for the production of By the Way, Meet Vera Stark, directed by Scott Reese and Alvin Mayes, and the cinematographer for its short film Belle of New Orleans. The production opened on October 7th, 2022, in the Kay Theatre at the Clarice Smith Performing Arts Center at the University of Maryland.
Atmospheric aerosols at the Pierre Auger Observatory and environmental implications
Creators: name: Louedec, K.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: The Pierre Auger Observatory detects the highest energy cosmic rays. Calorimetric measurements of extensive air showers induced by cosmic rays are performed with a fluorescence detector. Thus, one of the main challenges is the atmospheric monitoring, especially for aerosols in suspension in the atmosphere. Several methods are described which have been developed to measure the aerosol optical depth profile and aerosol phase function, using lasers and other light sources as recorded by the fluorescence detector. The origin of atmospheric aerosols traveling through the Auger site is also presented, highlighting the effect of surrounding areas to atmospheric properties. In the aim to extend the Pierre Auger Observatory to an atmospheric research platform, a discussion about a collaborative project is presented.
description: Regular Article, 16 pages, 12 figures
Literacy and anger regulation among upper elementary students
Creators: name: Weinberg, Hayley Ilana
Publisher: name: Digital Repository at the University of Maryland
Year: 2022
Subjects: subject: Psychology
subject: FOS: Psychology
subject: Educational psychology
subject: Achievement
subject: Anger regulation
subject: Literacy

description: The contribution of this study is the examination of the relation between literacy and use of anger regulation strategies in upper elementary children. This short-term longitudinal study includes two time points, approximately four months apart. This study examines whether performance on a literacy achievement task predicts later self-reported frequency of anger regulation strategy use. I will also examine the effects of gender on the relation between literacy and anger regulation. Participants included a sample of 253 students between ages 8-11 years old from two Maryland elementary schools (mean age = 9.7; 57% female; 32% dual language learners; 5% Asian, 10% Black, 6% Latinx, 65% White, 12% multiethnic students). Path analyses were conducted to test a model of Time 1 literacy achievement impacting the outcome of later Time 2 anger regulation, controlling for related demographic variables and Time 1 literacy achievement scores. Literacy was not found to be a significant predictor of anger regulation. However, this study provides insight into the relation between literacy achievement and anger regulation and ideas for future directions for research in this area.
RNA under Tension: Folding Landscapes, Kinetic Partitioning Mechanism, and Molecular Tensegrity
Creators: name: Lin, Jong-Chin
name: Hyeon, Changbong
name: Thirumalai, D.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Biomolecules (q-bio.BM)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: Non-coding RNA sequences play a great role in controlling a number of cellular functions, thus raising the need to understand their complex conformational dynamics in quantitative detail. In this perspective, we first show that single molecule pulling experiments when combined with with theory and simulations can be used to quantitatively explore the folding landscape of nucleic acid hairpins, and riboswitches with tertiary interactions. Applications to riboswitches, which are non-coding RNA elements that control gene expression by undergoing dynamical conformational changes in response to binding of metabolites, lead to an organization principle that assembly of RNA is determined by the stability of isolated helices. We also point out the limitations of single molecule pulling experiments, with molecular extension as the only accessible parameter, in extracting key parameters of the folding landscapes of RNA molecules.
description: 24 pages, 6 figures
Soft-collinear gravity
Creators: name: Beneke, Martin
name: Kirilin, Grisha
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study collinear and soft singularities in perturbative quantum gravity by constructing an effective field theory similar to soft-collinear effective theory for QCD (SCET). We find that the soft sector exhibits factorization properties similar to those of SCET. The collinear sector is, however, quite different. While the leading-power collinear effective Lagrangian is trivial, the presence of the metric field $h_{++}$ with negative scaling dimension allows for collinear divergences in loop diagrams with couplings to non-collinear sources. We provide a compact proof of the well-known fact that there are no collinear singularities in perturbative quantum gravity by demonstrating the decoupling of $h_{++}$ from the sources. We briefly discuss the connection of our approach to recent work by Akhoury et al. (Phys. Rev. D84 (2011) 104040) as well as to the Weinberg's original paper (Phys. Rev. 140 (1965) B516), where the cancellation of the collinear singularities was demonstrated for the first time in the eikonal approximation.
description: 16 pages, 2 figures
Multiresonant Spinor Dynamics in a Bose-Einstein Condensate
Creators: name: Klempt, Carsten
name: Topic, O.
name: Gebreyesus, G.
name: Scherer, M.
name: Henninger, T.
name: Hyllus, P.
name: Ertmer, Wolfgang
name: Santos, Luis
name: Arlt, Jan J.
Publisher: name: College Park : American Physical Society
Year: 2009
Subjects: subject: Bogoliubov
subject: Bose-Einstein condensates
subject: Inhomogeneities
subject: Magnetic field dependences
subject: Spin excitation
subject: Spinor condensates
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We analyze the spinor dynamics of a (87)Rb F=2 condensate initially prepared in the m(F)=0 Zeeman sublevel. We show that this dynamics, characterized by the creation of correlated atomic pairs in m(F)=+/- 1, presents an intriguing multiresonant magnetic-field dependence induced by the trap inhomogeneity. This dependence is directly linked to the most unstable Bogoliubov spin excitations of the initial m(F)=0 condensate, showing that, in general, even a qualitative understanding of the pair-creation efficiency in a spinor condensate requires a careful consideration of the confinement.
Carboxymethyl chitosan-grafted polyvinylpyrrolidone-iodine microspheres for promoting the healing of chronic wounds
Creators: name: Yu, Jie
name: Wang, Pei
name: Yin, Mengting
name: Zhang, Kaiwen
name: Wang, Xiansong
name: Han, Bing
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biochemistry
subject: Space Science
subject: Medicine
subject: Molecular Biology
subject: Pharmacology
subject: Biotechnology
subject: Chemical Sciences not elsewhere classified
subject: Developmental Biology
subject: Marine Biology
subject: Cancer
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Virology

description: Chronic wounds that fail to heal are the most common complications experienced by diabetic patients, and current treatment remains unsatisfactory, mainly due to the vulnerability of diabetic wounds to bacterial infections. Chitosan derivatives are widely used to treat chronic wounds due to their excellent hydrophilicity, biodegradability, and antimicrobial activity and substantial contribution to tissue regeneration. However, the antimicrobial effect of chitosan is not sufficient due to the complicated pathological mechanism of diabetes mellitus. Here, we prepared carboxymethyl chitosan-grafted polyvinylpyrrolidone-iodine (CMC-g-PVPI) microspheres and used them to treat chronic wounds. Carboxymethyl chitosan (CMC) was used as the skeleton and was grafted with polyvinylpyrrolidone-iodine (PVPI) to form a CMC-g-PVPI complex hydrogel and CMC-g-PVPI microspheres, which formed as a result of the high shearing dispersion of the complex hydrogel. In vivo experiments on diabetic wounds revealed significantly accelerated wound closure in the presence of the microspheres, demonstrating the excellent potential of CMC-g-PVPI to promote skin wound regeneration under diabetic conditions.
Extended Coherence Time on the Clock Transition of Optically Trapped Rubidium
Creators: name: Kleine Buening, G.
name: Will, J.
name: Ertmer, Wolfgang
name: Rasel, Ernst Maria
name: Arlt, Jan J.
name: Klempt, Carsten
name: Ramirez-Martinez, F.
name: Piechon, F.
name: Rosenbusch, P.
Publisher: name: College Park : American Physical Society
Year: 2011
Subjects: subject: A-stability
subject: Clock transition
subject: Coherence time
subject: Dephasing
subject: Frequency measurements
subject: Frequency shift
subject: General nature
subject: Inhomogeneous density
subject: Integration time
subject: Light shift
subject: New mechanisms
subject: Noise contributions
subject: Quantum memories
subject: Systematic investigations
subject: Technical improvement
subject: entanglement
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Optically trapped ensembles are of crucial importance for frequency measurements and quantum memories but generally suffer from strong dephasing due to inhomogeneous density and light shifts. We demonstrate a drastic increase of the coherence time to 21 s on the magnetic field insensitive clock transition of Rb-87 by applying the recently discovered spin self-rephasing [C. Deutsch et al., Phys. Rev. Lett. 105, 020401 (2010)]. This result confirms the general nature of this new mechanism and thus shows its applicability in atom clocks and quantum memories. A systematic investigation of all relevant frequency shifts and noise contributions yields a stability of 2: 4 X 10(-11) tau(-1/2), where tau is the integration time in seconds. Based on a set of technical improvements, the presented frequency standard is predicted to rival the stability of microwave fountain clocks in a potentially much more compact setup.
Chronologie. Archäologische Daten der Schweiz
Creators: name: Lüning, Jens
Publisher: name: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts
Year: 2019

description: Rezension zu: Chronologie. Archäologische Daten der Schweiz. Datation archéologique en Suisse. Antiqua 15. Veröffentlichung der Schweizerischen Gesellschaft für Ur- und Frühgeschichte, Basel 1986. 241 Seiten, zahlreiche Abbildungen und Tafeln

Rezension zu: B. Becker, A. Billamboz, H. Egger, P. Gassmann, A. Orcel, Chr. Orcel und U. Ruoff, Dendrochronologie in der Ur- und Frügeschichte. Die absolute Datierung von Pfahlbausiedlungen nördlich der Alpen im Jahrringkalender Mitteleuropas. Antiqua 11. Veröffentlichung der Schweizerischen Gesellschaft für Ur- und Frühgeschichte, Basel 1985. 68 Seiten mit 25 Abbildungen.
description: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts, Bd. 65, Nr. 2 (1987)
Hexapole-compensated magneto-optical trap on a mesoscopic atom chip
Creators: name: Joellenbeck, S.
name: Mahnke, J.
name: Randoll, R.
name: Ertmer, Wolfgang
name: Arlt, Jan J.
name: Klempt, Carsten
Publisher: name: College Park : American Physical Society
Year: 2011
Subjects: subject: Atom chips
subject: Atomic sample
subject: Bias field
subject: Bose-Einstein condensates
subject: Conveyor belts
subject: Cycle rate
subject: Loading rate
subject: Magnetooptical traps
subject: Mesoscopics
subject: Scientific objectives
subject: ultracold atoms
subject: losses
subject: surfaces
subject: beam
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Magneto-optical traps on atom chips are usually restricted to small atomic samples due to a limited capture volume caused primarily by distorted field configurations. Here we present a magneto-optical trap based on a millimeter-sized wire structure which generates a magnetic field with minimized distortions. Together with the loading from a high-flux two-dimensional magneto-optical trap, we achieve a loading rate of 8.4 x 10(10) atoms/s and maximum number of 8.7 x 10(9) captured atoms. The wire structure is placed outside of the vacuum to enable a further adaptation to new scientific objectives. Since all magnetic fields are applied locally without the need for external bias fields, the presented setup will facilitate parallel generation of Bose-Einstein condensates on a conveyor belt with a cycle rate above 1 Hz.
Bemerkungen zum Wechsel zwischen den Legionen XIV Gemina und XXII Primigenia in Mainz und zur Struktur des untergermanischen Heeres in trajanischer Zeit
Creators: name: Strobel, Karl
Publisher: name: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts
Year: 2019

description: -
description: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts, Bd. 66, Nr. 2 (1988)
Improvement of an Atomic Clock using Squeezed Vacuum
Creators: name: Kruse, I.
name: Lange, K.
name: Peise, J.
name: Lücke, Bernd
name: Pezze, L.
name: Arlt, Jan J.
name: Ertmer, Wolfgang
name: Lisdat, C.
name: Santos, Luis
name: Smerzi, A.
name: Klempt, Carsten
Publisher: name: College Park : American Physical Society
Year: 2016
Subjects: subject: standard quantum limit
subject: spin states
subject: entanglement
subject: sensitivity
subject: times
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Since the pioneering work of Ramsey, atom interferometers are employed for precision metrology, in particular to measure time and to realize the second. In a classical interferometer, an ensemble of atoms is prepared in one of the two input states, whereas the second one is left empty. In this case, the vacuum noise restricts the precision of the interferometer to the standard quantum limit (SQL). Here, we propose and experimentally demonstrate a novel clock configuration that surpasses the SQL by squeezing the vacuum in the empty input state. We create a squeezed vacuum state containing an average of 0.75 atoms to improve the clock sensitivity of 10000 atoms by 2.05(-0:37)(+0.34) dB. The SQL poses a significant limitation for today's microwave fountain clocks, which serve as the main time reference. We evaluate the major technical limitations and challenges for devising a next generation of fountain clocks based on atomic squeezed vacuum.
Concentrations and isotope ratios of helium and other noble gases in the Earth's atmosphere during 1978-2011
Creators: name: Brennwald, Matthias S.
name: Vogel, Nadia
name: Figura, Simon
name: Vollmer, Martin K.
name: Langenfelds, Ray
name: Steele, L. Paul
name: Kipfer, Rolf
Publisher: name: arXiv
Year: 2012
Subjects: subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: The evolution of the atmospheric noble gas composition during the past few decades has hardly been studied because, in contrast to many other atmospheric gases, systematic time-series measurements have not been available. Based on theoretical considerations, the atmospheric noble gas isotope composition is assumed to be stable on time scales of up to about 10^6 years, with the potential exception of anthropogenic changes predicted for the He concentration and the 3He/4He ratio. However, experimental assessments of the predicted changes in the atmospheric He isotope composition are controversial. To empirically test these assumptions and predictions, we analysed the noble gas isotope composition in samples of the Cape Grim Air Archive, a well-defined archive of marine boundary layer air in the southern hemisphere. The resulting time series of the 20Ne, 40Ar, 86Kr and 136Xe concentrations and 20Ne/22Ne and 40Ar/36Ar ratios during 1978-2011 demonstrate the stability of the atmospheric Ne, Ar, Kr and Xe composition during this time interval. The He isotope data provide strong evidence for a decrease in the 3He/4He during the same time interval at a mean rate of 0.23-0.30 permil per year. This result is consistent with most model predictions of the rate of decrease in the atmospheric 3He/4He ratio associated with mining and burning of fossil fuels.
Preparation of Ultracold Atom Clouds at the Shot Noise Level
Creators: name: Gajdacz, M.
name: Hilliard, A.J.
name: Kristensen, M.A.
name: Pedersen, P.L.
name: Klempt, Carsten
name: Arlt, Jan J.
name: Sherson, J.F.
Publisher: name: College Park : American Physical Society
Year: 2016
Subjects: subject: Atom numbers
subject: High-precision
subject: Non destructive
subject: Real time analysis
subject: Second imaging
subject: Shot-noise level
subject: Ultra-cold
subject: Ultracold atoms
subject: quantum
subject: entanglement
subject: number
subject: states
subject: limit
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We prepare number stabilized ultracold atom clouds through the real-time analysis of nondestructive images and the application of feedback. In our experiments, the atom number N similar to 10(6) is determined by high precision Faraday imaging with uncertainty Delta N below the shot noise level, i.e., Delta N < root N. Based on this measurement, feedback is applied to reduce the atom number to a user-defined target, whereupon a second imaging series probes the number stabilized cloud. By this method, we show that the atom number in ultracold clouds can be prepared below the shot noise level.
Fractional quantum conductance staircase of edge hole channels in silicon quantum wells
Creators: name: Bagraev, N. T.
name: Klyachkin, L. E.
name: Kudryavtsev, A. A.
name: Malyarenko, A. M.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences
subject: 76-05

description: We present the findings for the fractional quantum conductance of holes that is caused by the edge channels in the silicon nanosandwich prepared within frameworks of the Hall geometry. This nanosandwich represents the ultra-narrow p-type silicon quantum well (Si-QW), 2 nm, confined by the δ-barriers heavily doped with boron on the n-type Si (100) surface. The edge channels in the Si-QW plane are revealed by measuring the longitudinal quantum conductance staircase, Gxx, as a function of the voltage applied to the Hall contacts, Vxy, to a maximum of 4e2/h. In addition to the standard plateau, 2e2/h, the variations of the Vxy voltage appear to exhibit the fractional form of the quantum conductance staircase with the plateaus and steps that bring into correlation respectively with the odd and even fractional values.
description: 7 pages and 4 figures
Data-driven Storytelling in Dynamic Graph Comics through Hierarchical Clustering
Creators: name: Kannan, Abhinav
Publisher: name: Digital Repository at the University of Maryland
Year: 2023
Subjects: subject: Information science
subject: Computer science
subject: Occupational safety
subject: Comics
subject: Data Visualization
subject: Data-Driven Storytelling
subject: Dynamic Networks
subject: Summaries
subject: User Interfaces

description: In this work, we propose a tool to generate a dynamic graph comic given dense, time-series edge-vertex data. Prior research has demonstrated the effectiveness of node-link diagrams as an expressive medium for storytelling with dynamic graphs, and in this work, we develop an interface that generates a customizable comic strip consisting of node-link diagram snapshots. We use hierarchical aggregation to cluster and pile graphs based on the number of frames a user may wish to see, with each frame depicting a snapshot in time. We validate the interface with real-world datasets to understand temporal changes in a graph network, and evaluate the interface against an expert audience. Finally, we propose a path forward for improvement of dynamic graph comics as a storytelling medium.
INVESTIGATION OF SUBSURFACE FEATURES AT 15TM35: THE BIBB ESCAPES/GATEWOOD PLANTATION
Creators: name: VonStrohe, Doug
Publisher: name: Digital Repository at the University of Maryland
Year: 2023
Subjects: subject: Archaeology
subject: Henry Bibb

description: The Bibb Escapes/Gatewood Plantation (15TM35) is located on private property in Bedford, Trimble County, in the Outer Bluegrass Region of Kentucky. Recently, the site has been added to the National Park Service’s National Underground Railroad Network to Freedom program due to the historical association with an escaped enslaved man, Henry Bibb. Henry, his wife Malinda, and their daughter were owned by William Gatewood. After multiple failed attempts of fleeing slavery, the Bibb family was sold down the Ohio River and were separated. Henry eventually escaped to Canada and became a prominent figure in the African-American community and abolitionist circuit. Bibb wrote his autobiography detailing his successful and failed attempts of escaping slavery and made mentions of his time on the Gatewood Plantation. Other archival data shows there were approximately one dozen enslaved persons on the Gatewood Plantation throughout the antebellum time period, but not much else is known about them.The Oldham County History Center has sponsored public archaeological excavations at the site since 2005, including public excavations and a summer field school for high school students. Early excavations uncovered a stone chimney and presumably a summer kitchen with a possible pit cellar. Recent public excavations documented an area of interest that includes a separate activity area indicating a structure with three subsurface features. For this thesis I hypothesize the area of interest to be the location of the quarters for the enslaved people on the Gatewood Plantation. Other queries include: what is the form and function of this building and how do the features function within the whole Gatewood Plantation? Do the cultural materials represent the antebellum time period? Can the cultural materials demonstrate the change in occupancy or indicate specific behaviors of the occupants of the structure? Excavation of the features and analysis of the cultural materials was conducted to answer the research questions. The results of the fieldwork and analysis supported by historical documentation of the Gatewood Plantation and compared to other similar, local, and regional sites strongly indicate a positive response to the hypothesis. This investigation provides important information regarding past components of slave quarters within farmsteads of the Upland South. The archaeological work at 15TM35 also adds insight to the historic context of the region and to the history of Henry Bibb and the enslaved community he was part of.
Swinging, Stillness, and Self-Reflection: An Experiential Approach to Campanian Oscilla
Creators: name: May, Mekayla
Publisher: name: Digital Repository at the University of Maryland
Year: 2023
Subjects: subject: Art history
subject: Archaeology
subject: Classical literature
subject: atrium
subject: oscilla
subject: peristyle
subject: Roman art
subject: Roman domus

description: Modern studies of Roman oscilla, in their focus on the Latin etymology of the term and their treatment of the iconography as standardized Dionysiac imagery, neglect the animation of—and subsequent viewer engagement with—the objects themselves. Oscilla were double-sided marble reliefs suspended in the intercolumniations of predominantly domestic atria and peristyles. This thesis develops an experiential methodology to study the oscillum’s form, context, and disposition and examines their presence in elite and sub-elite houses and in atria and peristyles. The traditional view has characterized oscilla as commodified ancient agrarian ornaments that depict standardized imagery fit for a garden space; I argue in this thesis that the oscillum’s presence within such inherently social spaces as the Roman atrium and peristyle warrants more scrutiny. No two discovered oscilla are the same, and it is the varied imagery and forms that visually and mentally stimulate the Roman viewer as he waits in the reception spaces of the atrium and peristyle to conduct business with the head of the household.I discuss the oscilla programs of three Campanian houses, where oscilla are displayed in various parts of the Roman house, in houses of diverse social strata, and in different levels of quality. My first case study, the House of the Telephus Relief in Herculaneum, offers an opportunity to begin reconstructing a wealthy ancient viewer’s cognitive experience as four tondi oscilla are reinstalled in situ. These oscilla depict scenes of active movement, urging the viewer’s physical engagement alongside his intellectual recognition of proper decorum in the socially and politically charged space of the atrium. In my second case study, I investigate the oscilla program in the peristyle of the House of Marcus Lucretius in Pompeii, where images of solitary masks and instruments provoke theatrical participation and recollection; the oscilla frame and simultaneously disrupt the framing of the theatrical garden to draw attention to the aristocratic viewer’s participation in social performances. Finally, at the House of Fortune in Pompeii, a freedman involved in trade commissioned numerous albeit poor-quality oscilla that pair scenes of conflict with those of cooperation to convince the viewer of the patron’s social and civic participation in the domestic sphere. Together, these case cases demonstrate the oscillum, a unique double-sided and suspended decorative object, inherently mobile and mutable, offered multifaceted experiences between the object’s two sides and for many different types of Roman viewers.
Evolution and Eternity in the Landscape of Defeat: Yokoyama Taikan and Mt. Fuji
Creators: name: Mastrandrea, Magdalena
Publisher: name: Digital Repository at the University of Maryland
Year: 2023
Subjects: subject: Art history
subject: Asian studies

description: The end of the Fifteen Year War in August 1945 abruptly dismantled the ideology of art in service of the empire that established Japanese painters had worked under for over a decade. During this time, Yokoyama Taikan, a figurehead of the Nihonga painting genre who infamously called on artists to support the war effort, displayed hyper-nationalist paintings of Mt. Fuji, an icon synonymous with the nation of Japan. As droves of American Occupiers entered the country following Japan’s surrender, artists like Taikan quickly began to adjust their public image to avoid consequences. Yet only two years later, Taikan painted and displayed Landscape of the Four Seasons, an 88-foot-long scroll painting progressing through scenes of mountains, forests, rivers, and most notably, beginning with Mt. Fuji. Although painted in the midst of the Allied Occupation of Japan, when all Japanese media was subjected to strict censorship, Taikan’s use of Fuji at the beginning of this composition blatantly recalls his wartime paintings of the mountain. Despite this, he successfully exhibited Landscape of Four Seasons at the 1947 Japan Visual Arts Academy exhibition, or Inten, the first full-scale Inten since Japan’s surrender. In my analysis of this image, I begin by introducing compositionally similar Mt. Fuji paintings from before the war’s end to establish Taikan as a vehemently nationalistic artist who glorified the empire in the image of Fuji. Through examining the iconography and display of Landscape of the Four Seasons, painted in the dramatically shifted political climate of 1947, I argue that the image of Mt. Fuji, only recently associated with extreme nationalism and militarism, evolved rapidly after Japan’s surrender into a symbol of hope and resilience. The idealistic, symbolic nature of Nihonga painting allowed Taikan to exploit Fuji’s new meaning in defense of his wartime endeavors. Therefore, his Occupation era landscapes of the exact same subject matter evaded suspicion. Landscape of the Four Seasons is evidence of this phenomenon and of Taikan’s full reentry into the mainstream Japanese art world because of its display in the Inten, where it attracted significant attention. In addressing this, I explore the evolution of Mt. Fuji as an icon in the eyes of the Japanese and Americans alike, defining its new symbolism in the postwar period.
Quellen zur Geschichte des 7. und 8. Jahrhunderts. Die vier Bücher der Chroniken des sogenannten Fredegar (Chronicarum quae dicuntur Fredegarii libri quattuor). Die Fortsetzungen der Chroniken des sogenannten Fredegar (Chronicarum quae dicuntur Fredegarii continuationes). Das Buch von der Geschichte der Franken (Liber Historiae Francorum). Das alte Leben Lebuins (Vita Lebuini antiqua). Jonas erstes Buch vom Leben Columbans (lonae Vitae Columbani liber primus) / Quellen zur Geschichte der Alamannen VII: Indices
Creators: name: Rotter, Ekkehart
Publisher: name: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts
Year: 2019

description: Rezension zu: Quellen zur Geschichte des 7. und 8. Jahrhunderts. Die vier Bücher der Chroniken des sogenannten Fredegar (Chronicarum quae dicuntur Fredegarii libri quattuor). Die Fortsetzungen der Chroniken des sogenannten Fredegar (Chronicarum quae dicuntur Fredegarii continuationes). Das Buch von der Geschichte der Franken (Liber Historiae Francorum). Das alte Leben Lebuins (Vita Lebuini antiqua). Jonas erstes Buch vom Leben Columbans (lonae Vitae Columbani liber primus). Unter der Leitung von Herwig Wolfram neu übertragen von Herbert Haupt und Andreas Kusternig. Ausgewählte Quellen zur Deutschen Geschichte des Mittelalters. Freiherr-vom-Stein- Gedächtnisausgabe, Bd.IVa. Darmstadt 1982. ISBN 3-534-01414-6. XIV, 567 Seiten.
Quellen zur Geschichte der Alamannen VII: Indices. Bearbeitet von Ursula Koch, Wolfgang Kuhoff und Klaus Sprigade. Heidelberger Akademie der Wissenschaften. Kommission für Alamannische Altertumskunde. Schriften Bd.ll. Heidelberg 1987. ISBN 3-7995-6310-5. 156 Seiten.
description: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts, Bd. 66, Nr. 2 (1988)