cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The spectrum of SU(N) gauge theories at nonzero theta
Creators: name: Del Debbio, Luigi
name: Manca, Gian Mario
name: Panagopoulos, Haralambos
name: Skouroupathis, Apostolos
name: Vicari, Ettore
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We study the theta dependence of the spectrum of four-dimensional SU(N) gauge theories, where theta is the coefficient of the topological term in the Lagrangian, for N>=3 and in the large-N limit. We compute the O(theta^2) terms of the expansions around theta=0 of the string tension and the lowest glueball mass, respectively sigma(theta) = sigma (1 + s_2 theta^2 + ...) and M(theta) = M (1 + g_2 theta^2 + ...), where sigma and M are the values at theta=0. For this purpose we use numerical simulations of the Wilson lattice formulation of SU(N) gauge theories for N=3,4,6. The O(theta^2) coefficients turn out to be very small for all N>=3. For example, s_2=-0.08(1) and g_2=-0.06(2) for N=3. Their absolute values decrease with increasing N. Our results are suggestive of a scenario in which the theta dependence in the string and glueball spectrum vanishes in the large-N limit, at least for sufficiently small values of |theta|. They support the general large-N scaling arguments that indicate (theta/N) as the relevant Lagrangian parameter in the large-N expansion.
description: 7 pages, 4 figures. Talk presented at Lattice 2006
Assessment of Data Collection for ESAL Determinations for the Kentucky Transportation Cabinet, Division of Planning
Creators: name: Hunsucker, David Q.
name: Graves, R. Clark
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 2004
Subjects: subject: Transportation Engineering

description: The Kentucky Transportation Cabinet Cabinet’s Division of Planning collects weight data, traffic volume data, and vehicle classification data. These data are used as inputs to determine ESALs (equivalent single axle loads). ESALs are used in the pavement design process to determine pavement thickness. There have been inconsistencies observed during the computation of the ESALs during the past three or four years. These inconsistencies have resulted in a significant inflation in the estimate of ESALs per year, which if used in the design process would result in significantly thicker pavements. For example, the ESALs per truck axle for rural principal arterials and rural minor arterials, between 1998 and 1999, more than doubled from, 0.275 to 0.555. Although there was only a small increase in this number after 1999, the value remained significantly higher than expected.  The objective of this research study was to evaluate the weight data collection equipment, on-site calibration procedures, and sampling techniques used by the Division of Planning for the different Aggregate Classes of highways in an effort to standardize procedures used by the Division of Planning to collect weight data.
Ersnesti, Jörg / Thönissen, Wolfgang (Hg.): Personenlexikon Ökumene
Creators: name: Voigt, Karl Heinz
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 61 Nr. 4 (2012): Ökumenische Rundschau, Band 61, Heft 4
Analysis Of Radiation Dose Distribution Inhomogenity Effects In Gamma Knife Radiosurgery Using Geant4
Creators: name: Dagli, Ozlem
name: Tanir, A. Gunes
name: Kurt, Gokhan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Medical Physics (physics.med-ph)
subject: FOS: Physical sciences

description: The Monte Carlo method is widely used in the Gamma Knife dose distribution calculations. In this study, Monte-Carlo simulation with Geant4 was applied to determine Leksell Gamma Knife dose distribution for homogeneous solid water and heterogeneous brain phantoms, and primarily focused on the differences arising from the effects of inhomogeneity. The relative dose graphs were displayed for different collimator diameters. The dose values from the maximal interval regions were determined and compared. It seen that when the collimator size was 4mm, the mean maximum relative dose point was at 47mm for water phantom and at 44mm for the brain. The difference found was about 6.38%. The differences among the results determined for water and brain were ranged from 2 to 17%. As a result, the inhomogeneity effect should be considered in dose calculation in Gamma Knife planning system. Keywords: Radiosurgery, Gamma Knife, γ-Rays, Inhomogeneity, Brain
Electronic structure of kinetic energy driven superconductors
Creators: name: Guo, Huaiming
name: Feng, Shiping
Publisher: name: arXiv
Year: 2006
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Within the framework of the kinetic energy driven superconductivity, we study the electronic structure of cuprate superconductors. It is shown that the spectral weight of the electron spectrum in the antinodal point of the Brillouin zone decreases as the temperature is increased. With increasing the doping concentration, this spectral weigh increases, while the position of the sharp superconducting quasiparticle peak moves to the Fermi energy. In analogy to the normal-state case, the superconducting quasiparticles around the antinodal point disperse very weakly with momentum. Our results also show that the striking behavior of the superconducting coherence of the quasiparticle peaks is intriguingly related to the strong coupling between the superconducting quasiparticles and collective magnetic excitations.
description: 8 pages, 4 figures, added discussions and updated references, accepted for publication in Physics Letters A
PSR J1641+3627F: a low-mass He white dwarf orbiting a possible high-mass neutron star in the globular cluster M13
Creators: name: Cadelano, Mario
name: Chen, Jianxing
name: Pallanca, Cristina
name: Istrate, Alina G.
name: Ferraro, Francesco R.
name: Lanzoni, Barbara
name: Freire, Paulo C. C.
name: Salaris, Maurizio
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We report on the discovery of the companion star to the millisecond pulsar J1631+3627F in the globular cluster M13. By means of a combination of optical and near-UV high-resolution observations obtained with the Hubble Space Telescope, we identified the counterpart at the radio source position. Its location in the color-magnitude diagrams reveals that the companion star is a faint (V \sim 24.3) He-core white dwarf. We compared the observed companion magnitudes with those predicted by state-of-the-art binary evolution models and found out that it has a mass of 0.23 \pm 0.03 Msun, a radius of 0.033^+0.004_-0.005 Rsun and a surface temperature of 11500^+1900_-1300 K. Combining the companion mass with the pulsar mass function is not enough to determine the orbital inclination and the neutron star mass; however, the last two quantities become correlated: we found that either the system is observed at a low inclination angle, or the neutron star is massive. In fact, assuming that binaries are randomly aligned with respect to the observer line of sight, there is a \sim 70% of probability that this system hosts a neutron star more massive than 1.6 Msun. In fact, the maximum and median mass of the neutron star, corresponding to orbital inclination angles of 90 deg and 60 deg, are M_NS,max = 3.1 \pm 0.6 Msun and M_NS,med = 2.4 \pm 0.5 Msun, respectively. On the other hand, assuming also an empirical neutron star mass probability distribution, we found that this system could host a neutron star with a mass of 1.5 \pm 0.1 Msun if orbiting with a low-inclination angle around 40 deg.
description: Accepted for publication by ApJ
The Paris Peace Conference without the Bolshevik threat
Creators: name: Cooper, Susan Leslie
Publisher: name: University of British Columbia
Year: 2009

description: Arno J. Mayer became established as an authority on Peace Conference history with the 1967 publication of his sweeping class-based analysis, “Politics and Diplomacy of Peacemaking: Containment and Counterrevolution at Versailles”, 1918-1919. In it he maintains that the peacemakers who were gathered in Paris to settle accounts after the Great War were influenced more by the appearance of Bolshevism than by any other single factor. According to Mayer, the statesmen reacted to a threat from the Left that had been given momentum by Lenin's success in Russia. His panoramic view of class struggle across Europe and America, which likely seemed so apropos in the 1960s, has unfortunately obscured many of the opinions of the men who were actually there. This thesis is an investigation into the opinions of those men as revealed by a selection of primary source documents and as supported by appropriate secondary source material. The official and the personal records kept by the delegates who attended Versailles, reveal men who were not particularly concerned about the establishment of Bolshevism in Russia. The records clearly establish that the leading statesmen of the day, including David Lloyd George and Woodrow Wilson, were not apprehensive about and did not feel threatened by either Lenin or the Hungarian Bolshevik, Bela Kun. There is ample evidence to show that in 1919 the peacemakers and their contemporaries felt that Bolshevism in Russia was only a temporary phenomenon in that country's development toward liberal democracy. While Bolshevism did not overly concern the Allied leaders, issues such as reparations to be charged to Germany, formation of a League of Nations, and their respective places in the postwar world certainly did concern them. Arno Mayer's claim that i t "was symptomatic of the entire Peace Conference that the specter of Bolshevism significantly impinged on the deliberations of both opening sessions," (Mayer, 411) is not defensible on the basis of the documents and the memoirs left by the peacemakers themselves.
GPCAL: a generalized calibration pipeline for instrumental polarization in VLBI data
Creators: name: Park, Jongho
name: Byun, Do-Young
name: Asada, Keiichi
name: Yun, Youngjoo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present the Generalized Polarization CALibration pipeline (GPCAL), an automated pipeline for instrumental polarization calibration of very long baseline interferometry (VLBI) data. The pipeline is designed to achieve a high calibration accuracy by means of fitting the instrumental polarization model, including the second-order terms, to multiple calibrators data simultaneously. It also allows using more accurate linear polarization models of calibrators for D-term estimation compared to the conventional way that assumes similar linear polarization and total intensity structures. This assumption has widely been used in the existing packages for instrumental polarization calibration but could be a source of significant uncertainties when there is no suitable calibrator satisfying the assumption. We demonstrate the capabilities of GPCAL by using simulated data, archival Very Long Baseline Array (VLBA) data of many active galactic nuclei (AGN) jets at 15 and 43 GHz, and our Korean VLBI Network (KVN) observations of many AGN jets at 86, 95, 130, and 142 GHz. The pipeline could reproduce the complex linear polarization structures of several sources shown in the previous studies using the same VLBA data. GPCAL also reveals a complex linear polarization structure in the flat-spectrum radio quasar 3C 273 from the KVN data at all four frequencies. These results demonstrate that GPCAL can achieve a high calibration accuracy for various VLBI arrays.
description: 20 pages, 12 figures, accepted for publication in ApJ
State Traffic Volume Systems Count Estimation Process
Creators: name: Kreis, Doug
name: Quigley, Angie
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 2004
Subjects: subject: Transportation Engineering

description: The Kentucky Transportation Cabinet has an immense traffic data collection program that is an essential source for many other programs. The Division of Planning processes traffic volume counts annually. These counts are maintained in the Counts Database (CTS), which contains over 20,000 separate station locations and some traffic counts from as early as 1963.  The Division of Planning currently collects traffic volume counts for all non-interstate routes on a revolving three year basis. Years wherein actual counts are not performed are supplemented with estimates generated by a FORTRAN program. Estimates are projected using prior actual counts by weighted linear regression methods. If an actual count is performed during the fiscal year, this count then replaces the estimated count. These traffic volume counts, both actual and estimated, are compiled into the Traffic Volume System (TVS).  The focus of this project was to research potential estimating methods to fulfill the above mentioned requests and to analyze possible contributing factors to traffic volume counts such as traffic growth, population, and economic development.
Decrease in the summer rainfall of the southern United States coast and the Caribbean due to climate change
Creators: name: Céspedes, Roque
name: Holland, Gregory
name: Mearns, Linda
Publisher: name: University Corporation For Atmospheric Research (UCAR)
Year: 2009
Subjects: Intergovernmental Panel on Climate Change
emissions
future climate

Simulations from the North American Regional Climate Change Assessment Program (NARCAPP) Geophysical Fluid Dynamics Laboratory (GFDL) AM2.1 timeslice experiment, for current climate (1971-2000) and future climate (2041-2070), were compared and contrasted to assess how May through October accumulated rainfall is responding to climate change along the southern United States coast and in the Caribbean under the Intergovernmental Panel on Climate Change (IPCC) A2 emissions scenario (a scenario of relatively high emissions increase). The simulations were done on a global domain at a horizontal resolution of roughly 50 km. There is an overall decrease of about 200 mm (30 percent) in the May through October rainfall in the region of the southern United States coast and the Caribbean. The absolute decrease is larger in the regions that receive the most rain. However, proportionally, the decrease is larger in the regions that receive the least rain. For the subregion of Florida, rainfall time series indicate a delay of the region’s late wet period in the future climate. This shift needs to be further examined to determine its significance and underlying physical processes. Florida also received less rainfall in future climate, but the standard deviation of the early and late wet periods was found to be larger. This is in accord with the findings of the IPCC of an increase in global extremes as a result of climate change. In a future study, the time series for four other subregions will be analyzed.
Resolving the two-dimensional ANNNI model using transfer matrices
Creators: name: Hu, Yi
name: Charbonneau, Patrick
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The phase diagram of the two-dimensional ANNNI model has long been theoretically debated. Extremely long structural correlations and relaxation times further result in numerical simulations making contradictory predictions. Here, we introduce a numerical transfer matrix treatment that bypasses these problems, and thus overcome various ambiguities in the phase diagram. In particular, we confirm the transition temperatures and clarify the order of the transition to the floating incommensurate phase. Our approach motivates considering transfer matrices for resolving long-standing problems in related statistical physics models.
description: 5 pages, 4 figures
Development and Application of a Diaphragm Micro-Pump with Piezoelectric Device
Creators: name: Ma, H. K.
name: Hou, B. R.
name: Wu, H. Y.
name: Lin, C. Y.
name: Gao, J. J.
name: Kou, M. C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Other Computer Science (cs.OH)
subject: FOS: Computer and information sciences

description: In this study, a new type of thin, compact, and light weighed diaphragm micro-pump has been successfully developed to actuate the liquid by the vibration of a diaphragm. The micro-diaphragm pump with two valves is fabricated in an aluminum case by using highly accurate CNC machine, and the cross-section dimension is 5mm x 8mm. Both valves and diaphragm are manufactured from PDMS. The amplitude of vibration by a piezoelectric device produces an oscillating flow which may change the chamber volume by changing the curvature of a diaphragm. Several experimental set-ups for performance test in a single micro-diaphragm pump, isothermal flow open system, and a closed liquid cooling system is designed and implemented. The performance of one-side actuating micro-diaphragm pump is affected by the design of check valves, diaphragm, piezoelectric device, chamber volume, input voltage and frequency. The measured maximum flow rate of present design is 72 ml/min at zero total pump head in the range of operation frequency 70-180 Hz.
description: Submitted on behalf of EDA Publishing Association (http://irevues.inist.fr/EDA-Publishing)
Bayesian AGN Decomposition Analysis for SDSS Spectra: A Correlation Analysis of [OIII]$\lambda5007$ Outflow Kinematics with AGN and Host Galaxy Properties
Creators: name: Sexton, Remington O.
name: Matzko, William
name: Darden, Nicholas
name: Canalizo, Gabriela
name: Gorjian, Varoujan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present Bayesian AGN Decomposition Analysis for SDSS Spectra (BADASS), an open source spectral analysis code designed for automatic detailed deconvolution of AGN and host galaxy spectra, implemented in Python, and designed for the next generation of large scale surveys. BADASS simultaneously fits all spectral components, including power-law continuum, stellar line-of-sight velocity distribution, FeII emission, as well as forbidden (narrow), permitted (broad), and outflow emission line features, all performed using Markov Chain Monte Carlo to obtain robust uncertainties and autocorrelation analysis to assess parameter convergence. BADASS utilizes multiprocessing for batch fitting large samples of spectra while efficiently managing memory and computation resources and is currently being used in a cluster environment to fit thousands of SDSS spectra. We use BADASS to perform a correlation analysis of 63 SDSS type 1 AGNs with evidence of strong non-gravitational outflow kinematics in the [OIII]$\lambda5007$ emission feature. We confirm findings from previous studies that show the core of the [OIII] profile is a suitable surrogate for stellar velocity dispersion $σ_*$, however there is evidence that the core experiences broadening that scales with outflow velocity. We find sufficient evidence that $σ_*$, [OIII] core dispersion, and the non-gravitational outflow dispersion of the [OIII] profile form a plane whose fit results in a scatter of $\sim0.1$ dex. Finally, we discuss the implications, caveats, and recommendations when using the [OIII] dispersion as a surrogate for $σ_*$ for the $M_{\rm{BH}}-σ_*$ relation.
description: Accepted 18 October 2020. 28 pages, 22 figures, 1 table
Pattersoniella vitiphila Foissner 1987
Creators: name: Durán-Ramírez, Carlos Alberto
name: Dias, Roberto Júnio Pedroso
name: Estrada, Rosaura Mayén-
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Chromista
Ciliophora
Hypotrichea
Oxytrichida
Neokeronopsidae
Pattersoniella
Pattersoniella vitiphila

description: Pattersoniella vitiphila Foissner, 1987
Distribution. BRAZIL: Paraná River between the Nupelia’s Field Station and the district of Porto São José, São Pedro do Paraná (Buosi et al. 2014 b, 2015), (Ad). DOMINICAN REPUBLIC: (Foissner et al. 2003). MEXICO: Reserve of the Biosphere Chamela-Cuixmala (Durán-Ramírez & Mayén-Estrada 2018), (Bk, Td, Tr).
description: Published as part of Durán-Ramírez, Carlos Alberto, Dias, Roberto Júnio Pedroso & Estrada, Rosaura Mayén-, 2020, Checklist of ciliates (Alveolata: Ciliophora) that inhabit in bromeliads from the Neotropical Region, pp. 1-36 in Zootaxa 4895 (1) on page 11, DOI: 10.11646/zootaxa.4895.1.1, http://zenodo.org/record/4321437
An outline of the process needed for student understanding of hurricanes and El Niño Southern Oscillation (ENSO) events
Creators: name: Clarke, Karl
name: Geary, Edward
name: Randolph, James
name: Yule, Sheila
Publisher: name: University Corporation For Atmospheric Research (UCAR)
Year: 2008
Subjects: climate change
tropical cyclones
student research
research-based appraoch
hurricane frequency

As climate change more media attention, public interest in the possible connection between rising global temperatures and the severity of tropical cyclones is increasing. Research into this relationship is also increasing, but incorporating student research experiences on these topics into secondary schools have been slow. We hypothesized that a research-based approach to learning increases student understanding about severe storms. However, the first step towards encouraging them to conduct hurricane research and improve science education in the United States is to understand and address students’ misconceptions of hurricanes. This hypothesis commenced with the investigation of hurricane frequency during El Niño Southern Oscillation (ENSO) events between 1958 and 2007 in the six tropical cyclone basins (North Atlantic, Western North Pacific, Eastern North Pacific, North Indian, South Indian, and South Pacific). Data was gathered from international warning centers including the National Hurricane Center and the Joint Typhoon Warning Center. In addition to the relationship study of hurricane frequency and ENSO events, sea-surface temperature was also considered. The science described here was used as the basis for developing a survey to assess secondary school students’ understanding of the two phenomena. Personal interviews involved 50 students from eight countries at the Global Learning and Observations to Benefit the Environment Learning Expedition in Cape Town, South Africa. It found that high school students’ perception of basic hurricane formation, relationship to ENSO events and risks were accurate. However, 34% and 72% of the respondents respectively highlighted using student research to supplement academic/hurricane learning or wanted incorporating in-class exercises with practical field-based learning. This general understanding opens up future research into assessing hurricane instructions on students’ conception.
Momentum fluctuations in coarse grained systems
Creators: name: Parsa, M. Reza
name: Kim, Changho
name: Wagner, Alexander J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: At first glance the definition of mass and momentum appears to be uniquely defined. We show here, however, that this certainty can be misleading for many coarse grained systems. We show that particularly the fluctuating properties of common definitions of momentum in coarse grained methods like lattice gas and lattice Boltzmann do not agree with a fundamental definition of momentum. In the case of lattice gases, the definition of momentum will even disagree in the limit of large wavelength. For short times we can give analytical representations for the distribution of different momentum measures and thereby give a full account of these differences.
Present and future status of light dark matter models from cosmic-ray electron upscattering
Creators: name: Dent, James B.
name: Dutta, Bhaskar
name: Newstead, Jayden L.
name: Shoemaker, Ian M.
name: Arellano, Natalia Tapia
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Non-relativistic Dark Matter (DM) can be accelerated by scattering on high-energy cosmic-ray (CR) electrons. This process leads to a sub-population of relativistic or semi-relativistic DM which extends the experimental reach for direct detection in the sub-GeV mass regime. In this paper we examine the current and future potential of this mechanism for constraining models of light dark matter. In particular, we find that Super-Kamiokande and XENON1T data can already provide leading constraints on the flux of dark matter that has been accelerated to high energies from cosmic ray electrons. We also examine future projected sensitivities for DUNE and Hyper-K, and contrary to previous findings, conclude that DUNE will be able supersede Super-K bounds on cosmic-ray upscattered DM for a variety of DM models.
description: 17 pages, 6 figures
Simulation of valveless micropump and mode analysis
Creators: name: Lan, W. P.
name: Chang, J. S.
name: Wu, K. C.
name: Shih, Y. C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Other Computer Science (cs.OH)
subject: FOS: Computer and information sciences

description: In this work, a 3-D simulation is performed to study for the solid-fluid coupling effect driven by piezoelectric materials and utilizes asymmetric obstacles to control the flow direction. The result of simulation is also verified. For a micropump, it is crucial to find the optimal working frequency which produce maximum net flow rate. The PZT plate vibrates under the first mode, which is symmetric. Adjusting the working frequency, the maximum flow rate can be obtained. For the micrpump we studied, the optimal working frequency is 3.2K Hz. At higher working frequency, say 20K Hz, the fluid-solid membrane may come out a intermediate mode, which is different from the first mode and the second mode. It is observed that the center of the mode drifts. Meanwhile, the result shows that a phase shift lagging when the excitation force exists in the vibration response. Finally, at even higher working frequency, say 30K Hz, a second vibration mode is observed.
description: Submitted on behalf of EDA Publishing Association (http://irevues.inist.fr/EDA-Publishing)
Revealing ringed galaxies in group environments
Creators: name: Fernandez, Julia
name: Alonso, . Sol
name: Mesa, Valeria
name: Duplancic, Fernanda
Publisher: name: arXiv
Year: 2024
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Aims. We explore galaxies with ringed structures inhabiting poor and rich groups with the aim of assessing the effects of local density environments on ringed galaxy properties. Methods. We identified galaxies with inner, outer, nuclear, inner+outer (inner and outer rings combined), and partial rings that reside in groups by cross-correlating a sample of ringed galaxies with a group catalog obtained from Sloan Digital Sky Survey (SDSS). The resulting sample was divided based on group richness. To quantify the effects of rings and the role of local density environment on galaxy properties, we constructed a suitable control sample for each catalog of ringed galaxies, consisting of non-ringed galaxies with similar values for the z, magnitude, morphology, group masses, and environmental density distributions as those of ringed ones. We explored the occurrence of ringed galaxies in poor and rich groups and analyzed several galaxy properties, such as SFR, stellar populations, and colors. Results. We obtained a sample of 637 ringed galaxies residing in groups. With 76% of these galaxies inhabiting poor groups and 24% rich groups. In addition, ringed galaxies in groups display a reduction in their star formation activity and aged stellar populations, compared to non-ringed ones in the control samples. However, the SFR is higher for nuclear rings in poor groups than for other types. This disparity may stem from the environmental influence on the internal processes of galaxies, either enhancing or diminishing star formation. Ringed galaxies also show an excess of red colors and tend to populate the green valley and the red sequence of color-magnitude and color-color diagrams, with a surplus of galaxies in the red sequence, while non-ringed galaxies are found in the green valley and the blue region. These trends are more significant in galaxies with ringed structures residing in rich groups.
description: 13 pages, 11 figures. Accepted for publication in A&A
Testing Quantum Electrodynamics with Exotic Atoms
Creators: name: Paul, Nancy
name: Bian, Guojie
name: Azuma, Toshiyuki
name: Okada, Shinji
name: Indelicato, Paul
Publisher: name: arXiv
Year: 2020
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Precision study of few-electron, high-$Z$ ions is a privileged field for probing high-field, bound-state quantum electrodynamics (BSQED). However, the accuracy of such tests is plagued by nuclear uncertainties, which are often larger than the BSQED effects under investigation. We propose an alternative method with exotic atoms, and show that transitions may be found between circular Rydberg states where nuclear contributions are vanishing while BSQED effects remain large. When probed with newly available quantum sensing detectors, these systems offer gains in sensitivity of \numrange{1}{2} orders of magnitude, while the mean electric field in these systems largely exceeds the Schwinger limit.
Mod $p$ vanishing theorem of Seiberg-Witten invariants for 4-manifolds with $Z_p$-actions
Creators: name: Nakamura, N.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 57R57, 57S17 (Primary) 57M60(Secondary)

description: We give an alternative proof of the mod $p$ vanishing theorem by F.Fang of Seiberg-Witten invariants under a cyclic group action of prime order, and generalize it to the case when $b_1>0$. Although we also use the finite dimensional approximation of the monopole map as well as Fang, our method is rather geometric. Furthermore, non-trivial examples of mod $p$ vanishing are given.
description: 20 pages
A citizen science campaign encouraging urban forest professionals to engage the public in the collection of tree phenological data
Creators: name: Clarke, Karl
name: Henderson, Sandra
name: Meymaris, Kirsten
Publisher: name: University Corporation For Atmospheric Research (UCAR)
Year: 2009
Subjects: scientific literacy
public participation
urban tree phrenology
plant ecology
climate change
public health
urban heat islands

There are growing concerns among leading national and local organizations about American scientific literacy, fundamental understanding of science, and the value of scientific research. These organizations, including the University Corporation for Atmospheric Research, have been at the forefront to change this trend. In an effort to improve scientific literacy, research conducted by Sam Droege, amongst others, suggested using citizen science and public participation as one instrumental method to engage the public. Urban Tree Phenology (UTP), a project of Project BudBurst and the USDA Forest Service, is one such citizen science program that sought to educe the public, including the professionals and the amateurs among them, in collecting urban tree phenophase data. UTP participants monitored and reported the stages of phenological events, such as First Leaf and Leaf Fall, of twenty-four native and cultivated urban tree species. Data collected will support the long-term research of plant ecology, climate change, public health, urban heat islands on tree physiology, and urban tree management. UTP, using the architectures of online learning, has developed two instructional tutorials to assist data collection (Phase 1). The instructional tutorials were published online, in print and PowerPoint formats, at www.UrbanTreePhenology.com. By completing these tutorials, participants will gain the skills necessary to provide urban tree phenological data to national research databases via the Internet. Phase 2 will test and review the instructional materials developed, and in Phase 3, the administrators of UTP will distribute promotional materials, to national research organizations, and to participants of the Project BudBurst national citizen science campaign.
Enhanced Sensing Characteristics in MEMS-based Formaldehyde Gas Sensor
Creators: name: Wang, Yu-Hsiang
name: Hsiao, C. -C.
name: Lee, Chia-Yen
name: Ma, R. -H.
name: Chou, Po-Cheng
Publisher: name: arXiv
Year: 2008
Subjects: subject: Other Computer Science (cs.OH)
subject: FOS: Computer and information sciences

description: This study has successfully demonstrated a novel self-heating formaldehyde gas sensor based on a thin film of NiO sensing layer. A new fabrication process has been developed in which the Pt micro heater and electrodes are deposited directly on the substrate and the NiO thin film is deposited above on the micro heater to serve as sensing layer. Pt electrodes are formed below the sensing layer to measure the electrical conductivity changes caused by formaldehyde oxidation at the oxide surface. Furthermore, the upper sensing layer and NiO/Al2O3 co-sputtering significantly increases the sensitivity of the gas sensor, improves its detection limit capability. The microfabricated formaldehyde gas sensor presented in this study is suitable not only for industrial process monitoring, but also for the detection of formaldehyde concentrations in buildings in order to safeguard human health.
description: Submitted on behalf of EDA Publishing Association (http://irevues.inist.fr/EDA-Publishing)
Comparison of water vapor measurements from ground-based and space-based GPS atmospheric remote sensing techniques
Creators: name: Colรณn Pagรกn, Ian
name: Braun, John
name: Hunt, Douglas
name: Kuo, Ying-Hwa
name: Schreiner, William
Publisher: name: University Corporation For Atmospheric Research (UCAR)
Year: 2008
Subjects: precipitable water vapor
Caribbean Sea
Gulf of Mexico
radio occultation
global analysis

In this study, we compare precipitable water vapor (PWV) values from two different observing techniques over the Caribbean Sea, Gulf of Mexico, and United States regions, including ground-based GPS water vapor sensing and COSMIC radio occultation (RO) measurements, as well as global analyses from NCEP and ECMWF models. The results show good overall agreement; however, the PWV values estimated by ground-based GPS receivers tend to have a slight dry bias for low PWV values and a slight wet bias for higher PWV values, when compared with GPS RO measurements and global analyses. This may be a consequence of missing low altitude data from RO in areas where the water vapor is more concentrated, locations of the RO soundings with respect to ground-based stations, time and distance differences of either GPS techniques, or simply the difference of these two measurement techniques. An application of a student T-test to this 910 matched profiles sample gives a retrieved t-value of 2.35, which is larger than the critical value of the sample, 1.96. This means there is a significant difference between both ground-based and space-based GPS techniques datasets with a 0.01% chance of observing a difference as large as it was observed in other random samples. The dry bias associated with space-based GPS is attributed to the missing low altitude data, where the concentration of water vapor is large. The close agreements between space-based and global analyses are due to the fact that these global analyses assimilate space-based GPS RO data from COSMIC, and the retrieval of water vapor profiles from space-based technique requires the use of global analyses as the first guess. As a result, there is mutual dependence between them.
Brueckner-Goldstone perturbation theory for the half-filled Hubbard model in infinite dimensions
Creators: name: Ruhl, Daniel
name: Gebhard, Florian
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We use Brueckner-Goldstone perturbation theory to calculate the ground-state energy of the half-filled Hubbard model in infinite dimensions up to fourth order in the Hubbard interaction. We obtain the momentum distribution as a functional derivative of the ground-state energy with respect to the bare dispersion relation. The resulting expressions agree with those from Rayleigh-Schroedinger perturbation theory. Our results for the momentum distribution and the quasi-particle weight agree very well with those obtained earlier from Feynman-Dyson perturbation theory for the single-particle self-energy. We give the correct fourth-order coefficient in the ground-state energy which was not calculated accurately enough from Feynman-Dyson theory due to the insufficient accuracy of the data for the self-energy, and find a good agreement with recent estimates from Quantum Monte-Carlo calculations.
description: 15 pages, 8 fugures, submitted to JSTAT
Finanzierung von Open Access Publikationen für Wissenschaftler:innen der Universität Hamburg
Creators: name: Groth, Karin
Publisher: name: Zenodo
Year: 2022
Subjects: Open Access
Publishing
Openness
Finanzierung
SUB Hamburg

description: Open Access Publizieren ist häufig mit einigen Kosten verbunden! Hier erfahren Sie, womit und wie die Stabi Sie dabei unterstützen kann, Ihren Artikel kostenfrei oder auch rabattiert zu veröffentlichen und welchen Mehrwert Sie für Ihre Publikation dadurch erreichen können. Die vorliegenden Folien wurden während einer digitalen Coffee Lecture präsentiert, die am 25.10.2022 im Rahmen der Aktivitäten der Staats- und Universitätsbibliothek Hamburg organisiert von der Arbeitsstelle Open Science, zur International Open Access Week 2022 veranstaltet wurde.
Orographic effects on rainfall induced by the passage of tropical cyclones over mountainous islands. Part 1: The effect of cloud microphysics
Creators: name: Colón Pagán, Ian
name: Kuo, Ying-Hwa
name: Schreiner, William
Publisher: name: University Corporation For Atmospheric Research (UCAR)
Year: 2009
Subjects: microphysics
planetary boundary layer
puerto rico
hurricane
precipitation
flooding
landslides

The passage of a tropical cyclone (TC) over a mesoscale mountainous island, such as Puerto Rico, often brings heavy rainfall which produces flooding and landslides. Factors that affect the amount and distribution of this type of orographic rainfall in this region are not well understood. This study investigates the impact of microphysics (MP) schemes in a TC simulation using the Advanced Research Weather Research and Forecast (ARW) model. The numerical mesoscale ARW model was adopted to conduct a study of Hurricane Jeanne's (2004) passage over the island. Sensitivity experiments using four different MP schemes were performed. Each sensitivity experiment was represented by a single MP scheme, i.e.: WSM 5-Class (EXP1), Eta Ferrier Microphysics (EXP2), WSM 6-Class (EXP3), and the Thompson Graupel scheme (EXP4). Results show strong consistency for the cyclonic track among all experiments with a significant landfall time difference of ~4 hours ahead of observations. Rainfall distribution was well represented, with maxima on the southeastern and higher mountain regions. EXP3 produced the best simulation in terms of both rainfall distribution and locations with high rainfall magnitude. However, there were sizeable differences between the model cyclone’s wind intensity and minimum sea-level pressure at model landfall and those of the observed storm. EXP2 and EXP3 produced a more realistic sea-level pressure between 988 and 992 hPa, and sustained winds of less than 87 mph, compared with 991 mbar and 60 mph of the observed storm, respectively. In conclusion, the simulation using the WSM 6-Class scheme (EXP3) appears to be strongly comparable with observations, and is the best choice for further investigations of the production of heavy orographic rainfall. Future study will examine some control parameters and common ingredients, such as Convective Available Potential Energy (CAPE), Precipitation Efficiency (E), and the impact of mountain height variations, to help understand the dynamical and physical processes associated with orographic precipitation induced by the passage of a TC.
Topological Price of Anarchy Bounds for Clustering Games on Networks
Creators: name: Kleer, Pieter
name: Schäfer, Guido
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Science and Game Theory (cs.GT)
subject: FOS: Computer and information sciences

description: We consider clustering games in which the players are embedded in a network and want to coordinate (or anti-coordinate) their strategy with their neighbors. The goal of a player is to choose a strategy that maximizes her utility given the strategies of her neighbors. Recent studies show that even very basic variants of these games exhibit a large Price of Anarchy: A large inefficiency between the total utility generated in centralized outcomes and equilibrium outcomes in which players selfishly try to maximize their utility. Our main goal is to understand how structural properties of the network topology impact the inefficiency of these games. We derive topological bounds on the Price of Anarchy for different classes of clustering games. These topological bounds provide a more informative assessment of the inefficiency of these games than the corresponding (worst-case) Price of Anarchy bounds. As one of our main results, we derive (tight) bounds on the Price of Anarchy for clustering games on Erdős-Rényi random graphs (where every possible edge in the network is present with a fixed probability), which, depending on the graph density, stand in stark contrast to the known Price of Anarchy bounds.
Building fabrication-structure-application datacubes of 2D heterostructures
Creators: name: Wang, Jimi
Publisher: name: The University of Texas at Austin
Year: 2020
Subjects: 2D materials
Heterostructures
Datacubes

description: Researches on graphene and other two-dimensional (2D) layered materials remain exponential growth, driven by the fundamental interests and potential applications. Isolated atomic layers are intrinsically the building blocks that can be reassembled into vertically stacked heterostructures. Those so-called van der Waals heterostructures exhibit intriguing, unique properties that cannot be found in their single-layer counterparts. Recent deterministic placement methods have further opened up new possibilities to fabricate even more complex heterostructures with high performance. Here, this report provides insights into the recent progress of 2D heterostructures with an emphasis on their fabrication-structure-performance datacubes. First, we introduce a detailed description of state-of-the-art deterministic assembly and fabrication methods. We then compare different approaches, summarize their advantages and limitations, alongside the recommendations on choosing suitable techniques. Next, we will discuss the supreme electrical properties of heterostructures and the electron transfer mechanisms that make them outstanding. Then, we present some typical examples of state-of-the-art high-performance electronic applications. Finally, the perspectives and challenges will be addressed for future developments of 2D heterostructures.
Investigating the ability of CLM-CN 3.5 to accurately simulate vegitation density
Creators: name: Connolly-Brown, Eowyn
name: Mahowald, Natalie
name: Sealy, Andrea
name: Buja, Lawrence
Publisher: name: University Corporation For Atmospheric Research (UCAR)
Year: 2008
Subjects: terrestrial vegetation
feedbacks
carbon cycle
climate system

Terrestrial vegetation engages in important feedbacks with the carbon cycle and the climate system. The National Center for Atmospheric Research’s (NCAR) Community Land Model version 3.5 coupled to carbon/nitrogen cycling (CLM-CN 3.5) was compared to satellite observations of Normalized Difference Vegetation Index (NDVI) to investigate its ability to simulate temporal and spatial variability in vegetation density. High-resolution AVHRR satellite-derived NDVI data obtained from the University of Maryland Global Inventory Modeling and Mapping Studies (GIMMS) project was regridded and temporally averaged to match the monthly, 2.5° by 1.875° resolution of CLM-CN 3.5 NDVI values. In CLM-CN3.5 the NDVI was calculated from near-infrared and visible spectrum reflectances. Gridded monthly and annual climatological time series were produced to determine model accuracy at different spatial and temporal scales. Interannual variability simulation accuracy was examined using NDVI-anomaly plots for historically-documented droughts. Multidecadal trends in vegetation were investigated using time series of CLM-CN 3.5 NDVI data for 1870-2004 to see if the model captured the recent greening trend documented by previous research. Our findings indicate CLM-CN 3.5 tended to overestimate NDVI when values were less than 0.15, and underestimated otherwise. Modeled NDVI peaked a month sooner than observed values. Regionally, CLM-CN 3.5 did not capture the monsoon-induced vegetation response in the Sahel. Drought-vegetation response simulation varied in accuracy. CLM-CN 3.5 captured recent (1960-2004) multidecadal greening trends with a high degree of certainty (R=0.96). These results will form a foundation for future research to determine the causes of error and to address biases in future model development.
Transmission of correlated electrons through sharp domain walls in magnetic nanowires: a renormalization group approach
Creators: name: Araujo, M. A. N.
name: Dugaev, V. K.
name: Vieira, V. R.
name: Berakdar, J.
name: Barnas, J
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The transmission of correlated electrons through a domain wall in a ferromagnetic one dimensional system is studied theoretically in the limit of a domain wall width smaller or comparable to the electron Fermi wavelength. The domain wall gives rise to both potential and spin dependent scattering of the charge carriers. Using a poor man's renormalization group approach for the electron-electron interactions, we obtain the low temperature behavior of the reflection and transmission coefficients. The results show that the low-temperature conductance is governed by the electron correlations, which may suppress charge transport without suppressing spin current. The results may account for a huge magnetoresistance associated with a domain wall in ballistic nanocontacs.
description: 13 pages, 6 figures