cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Imaging SO2 concentrations via Laser Induced Fluorescence for investigations of the air-sided mass boundary layer
Creators: name: Friman, Sonja
name: Jähne, Bernd
Publisher: name: Zenodo
Year: 2018

description: This project aims at imaging gas concentration profiles with Laser-Induced Fluorescence of sulfur dioxide in invasion experiments in a wind-wave tunnel for investigations of the air-sided mass boundary layer and the gas transfer velocity. The technique will allow for contactless high resolution eddy covariance measurements in the laboratory.
description: {"references": ["Deacon, E. L., 1977: Gas transfer to and across an air-water interface. Tellus A, 29, pp. 363\u2013374.", "Krall, K., 2013. Laboratory Investigations of Air-Sea Gas Transfer under a Wide Range of Water Surface Conditions. PhD Thesis, University of Heidelberg.", "Buckley, M.P. and Veron, F., 2016. Structure of the airflow above surface waves. Journal of Physical Oceanography, 46(5), pp.1377-1397."]}
[Papers on Wappo berdaches]
Creators: name: Somersal, Laura
name: Sawyer, Jesse O.
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2023
Subjects: subject: wao

description: Typed drafts of two papers on berdaches in Wappo: "Wappo Berdache" and "Wappo: Berdaches?"
Multi-wavelength observations of Galactic hard X-ray sources discovered by INTEGRAL. II. The environment of the companion star
Creators: name: Rahoui, Farid
name: Chaty, Sylvain
name: Lagage, Pierre-Olivier
name: Pantin, Eric
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Context: The INTEGRAL mission has led to the discovery of a new type of supergiant X-ray binaries (SGXBs), whose physical properties differ from those of previously known SGXBs. Those sources are in the course of being unveiled by means of multi-wavelength X-rays, optical, near- and mid-infrared observations, and two classes are appearing. The first class consists of obscured persistent SGXBs and the second is populated by the so-called supergiant fast X-ray transients (SFXTs). Aims: We report here mid-infrared (MIR) observations of the companion stars of twelve SGXBs from these two classes in order to assess the contribution of the star and the material enshrouding the system to the total emission.} Methods: We used data from observations we carried out at ESO/VLT with VISIR, as well as archival and published data, to perform broad-band spectral energy distributions of the companion stars and fitted them with a combination of two black bodies representing the star and a MIR excess due to the absorbing material enshrouding the star, if there was any. Results: We detect a MIR excess in the emission of IGR J16318-4848, IGR J16358-4726, and perhaps IGR J16195-4945. The other sources do not exhibit any MIR excess even when the intrinsic absorption is very high. (abridged)
description: A&A in press, The official date of acceptance is 25/01/2008, 17 pages, 4 figures, 9 tables. New version with english language editing required by editor, note added in proof
Hyperglycemic challenge and distribution of adipose tissue in obese baboons
Creators: name: KULKARNI, TANMAY ABHAY
Publisher: name: Maryland Shared Open Access Repository
Year: 2014
Subjects: Adipose tissue
Dixon's technique to suppress fat
Glucose
Hyperglycemia
MRI

description: Blood glucose levels regulate the rate of insulin secretion, which is the body's mechanism for preventing excessive elevation in blood glucose. Impaired glucose metabolism and insulin resistance have been linked to excess body fat composition. The thesis focuses on the development of an imaging sequence and image analysis steps for performing body composition analysis based on 3D imaging of abdominal adipose tissue in a large nonhuman primate, baboon, and using segmentation approaches to calculate regional distribution of adipose tissue within the abdominal cavity. In addition, a data-driven analysis approach is used to correlate the total abdominal fat composition with serum glucose response to a hyperglycemic challenge. Five female baboons were fasted for 16 hours prior to 90 minute body imaging experiment that consisted of a 20-min baseline, followed by a bolus infusion of glucose(500mg/kg). The blood glucose was sampled at regular intervals. The total compositions of the muscle, visceral and subcutaneous adipose tissue were estimated in all five baboons. We found that adipose tissue composition is associated with the fluctuations in glucose responses as measured by IVGTT of a non-human primate. Mean (SD) values of body weight, and muscle, visceral, and subcutaneous adipose are 26.7 kg, 0.79 kg, 1.18 kg, and 1.39 kg, respectively. The glucose responses were positively correlated with body weight, visceral and muscle fat (p < 0.005). Polynomial regression analysis showed that body weight, visceral and muscle were significant predictors of serum glucose responses. (p < 0.001). These results indicate the similarity between humans and baboons with respect to glucose metabolism and strengthen the utility of baboon for biomedical research.
Phased Breaking of mu-tau symmetry and Leptogenesis
Creators: name: Ahn, Y. H.
name: Kang, Sin Kyu
name: Kim, C. S.
name: Lee, Jake
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Non-vanishing U_{e3} has been theoretically related to a certain flavor symmetry breaking in the neutrino sector. We propose a scenario to break the mu-tau symmetry so as to accommodate the non-vanishing U_{e3}. Our scenario is constructed in the context of a seesaw model, and the mu-tau symmetry breaking is achieved by introducing a CP phase in the Dirac Yukawa matrix. We also show how the deviation of theta_{23} from the maximal mixing and non-vanishing U_{e3} depend on the CP phase. Neutrino mixings and the neutrino mass-squared differences are discussed, and the amplitude in neutrinoless double beta decay m_{ee} are also predicted. We found that a tiny breaking of the mu-tau symmetry due to mass splitting between two degenerate heavy Majorana neutrinos on top of the Dirac CP phase can lead to successful leptogenesis. We examine how leptogenesis can be related with low energy neutrino measurement, and show that our predictions for U_{e3} and m_{ee} can be constrained by the current observation of baryon asymmetry.
description: 18 pages, 7 figures, published version in PRD
Protein-based microsphere biolasers fabricated by dehydration
Creators: name: Van Nguyen, Toan
name: Van Pham, Nhat
name: Mai, Hanh Hong
name: Duong, Dung Chi
name: Le, Hai Hoang
name: Sapienza, Riccardo
name: Ta, Van Duong
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Biolasers made of biological materials have attracted a great of research attention due to their biocompatibility and biodegradability, which have the potential for biosensors and biointegration. However, the current fabrication method of biolasers suffers several limitations such as complicated processes, time-consuming and environmental unfriendly. In this work, a novel approach with green processes for fabricating solid-state microspheres biolasers is demonstrated. By using dehydration via a modified MicroglassificationTM technology, dye-doped bovine serum albumin (BSA) droplets can quickly (less than 10 minutes) and easily turn into solid microspheres with the diameter ranging from 10-150 μm. The size of the microspheres can be effectively controlled by changing either the concentration of BSA solution or the diameter of the initial droplets. Fabricated microspheres can act as efficient microlasers under optical pulse excitation. Lasing threshold of 7.8 μJ mm-2 and quality (Q) factor of about 1700 to 3100 are obtained. The size-dependence of lasing characteristics have been investigated and the results show a good agreement with whispering gallery mode (WGM) theory. Our finding contributes an effective technique for the fabrication of high Q factor microlasers that may be potential for applications in biological and chemical sensors.
Nucleon structure in the chiral regime with domain wall fermions on an improved staggered sea
Creators: name: Edwards, R. G.
name: Fleming, G.
name: Hagler, Ph.
name: Negele, J. W.
name: Orginos, K.
name: Pochinsky, A. V.
name: Renner, D. B.
name: Richards, D. G.
name: Schroers, W.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: Moments of unpolarized, helicity, and transversity distributions, electromagnetic form factors, and generalized form factors of the nucleon are presented from a preliminary analysis of lattice results using pion masses down to 359 MeV. The twist two matrix elements are calculated using a mixed action of domain wall valence quarks and asqtad staggered sea quarks and are renormalized perturbatively. Several observables are extrapolated to the physical limit using chiral perturbation theory. Results are compared with experimental moments of quark distributions and electromagnetic form factors and phenomenologically determined generalized form factors, and the implications on the transverse structure and spin content of the nucleon are discussed.
description: Talks of J.W. Negele and D.B. Renner at Lattice 2006
Performance of unstiffened steel plate shear walls under cyclic quasi-static loading
Creators: name: Lubell, Adam S.
Publisher: name: University of British Columbia
Year: 2009

description: Several structures around the world have been designed with steel plate shear walls acting as the primary lateral load resisting system. It represents an innovative technique for providing high elastic strength, large displacement ductility capacity, and good energy dissipation properties in medium and highrise steel structures, which is of particular importance in areas of high seismic risk. An experimental testing programme was conducted at the University of British Columbia on two single and one multistorey steel plate shear wall assemblies. Each specimen consisted of a single bay, 30 % scale model of an inner residential building core with panel width to height aspect ratios of 1:1. Each specimen employed moment-resisting beam column connections, and thin unstiffened infill panels with full perimeter attachment to the surrounding frame. Quasi-static cyclic testing was conducted under standard testing protocols used to determine the seismic performance of steel structures. The determination of the load deformation response properties and resulting strain distribution in various components were the primary objectives of the testing program. The three test specimens were tested to maximum displacement ductilities of 7 x δ[sub γ], 6 x δ[sub γ], and 1.5 x δ[sub γ] respectively. The termination of each test was a result of local problems and limitations of the testing setup, and did not necessarily reflect the global displacement capacity limit of each specimen. Based on accepted guidelines, each specimen was characterised at test termination as experiencing moderate inelastic damage, while maintaining a force resistance capacity at 0r near the maximum level achieved. Inelastic damage modes included yielding of the infill plate followed by column yielding in the single storey specimens, and column yielding in the multistorey specimen. Simplified tension field analytical models,were developed using a non-linear frame analysis program. Numerical modelling was conducted for monotonic and cyclic loading cases, and compared with the load-deformation response characteristics obtained from physical testing. Additional studies were conducted on one of the models to investigate the sensitivity of the results to various model parameters. Finally, the adequacy of existing design guidelines were assessed on the basis of the' experimental and analytical results generated through this research programme. Proposed modifications to the existing code provisions have been identified.
Assessment of extraction kinetics of separation of Sm (III) and Co (II) in the presence of lactic acid using DEHPA as an organic carrier
Creators: name: Satpathy, Swagatika
name: Mishra, Sujata
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Biophysics
subject: Biochemistry
subject: Medicine
subject: Molecular Biology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Sociology
subject: FOS: Sociology
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences

description: This work reports the kinetics and the mechanism of extraction and separation of Sm (III) and Co (II) from an aqueous chloride medium with lactic acid as a complexing agent using DEHPA in petrofin. The influence of stirring speed and temperature was investigated to learn about the extraction regime. The increase in stirring speed and interfacial area led to a rise in the extraction rate of Sm (III) and Co (II). The extraction rate is negligibly dependent on pH, which can be ascribed to the buffering nature of lactic acid present in the aqueous feed. The results clarified that the extraction regime is governed by diffusion with rate indicative reaction at the interface. The extraction mechanism involved in the process has been derived based on kinetic data. Low, stirring speed and low interfacial area are necessary for efficient separation of Sm (III) and Co (III), as evident from the kinetic studies.
[Frank Hewer Diary 1906 - 1908]
Creators: name: Hewer, Frank Algernon
Publisher: name: The University of British Columbia
Year: 2017

description: Daily Journal by Frank Hewer for 1906, plus four separate enclosures from 1908. Entries from January to the end of March are chiefly to do with the insurance business he was involved in in Penticton.
Report on New Methods for Data Quality Assurance, Verification and Enrichment
Creators: name: Phillips Sarah
name: Dillen Mathias
name: Groom Quentin
name: Green Laura
name: Weech Marie- Hélène
name: Wijkamp Noortje
Publisher: name: Zenodo
Year: 2019

description: Distributed Systems of Scientific Collections (DiSSCo) will facilitate the production of tens of millions
 of natural history specimen collection images along with their labels each year. The labels of these
 specimens contain valuable information for research studies, but their transcription can be very
 difficult and time consuming with often hard to read handwritten labels. Whilst accurate label
 transcription is only one step along the way to create a specimen record fit for different research uses,
 it is an extremely important one. It would be very time consuming to have to return to recheck label
 information for even a very small proportion of specimens. Once a specimen is transcribed correctly
 it becomes much easier to enhance the record with additional information from other sources, e.g.
 from literature or collector itineraries, determine the point of collection from the textual information
 on the label by a process known as georeferencing, or even to find inaccuracies within the label itself.
 This document discusses and compares different approaches for the efficient accurate transcription
 of these labels. Using Herbarium specimens as an example, the quality of transcribed data by in-house
 trained institute staff, outsourced to a commercial company or transcribed by the general public
 through online crowdsourcing platforms was compared. Key transcription data was assessed and
 common errors in label transcription identified. Reasons for these errors are discussed along with
 possible mechanisms to improve the accuracy of the transcriptions. The need for standards for
 transcription was identified and recommendations made.
Localization and its consequences for quantum walk algorithms and quantum communication
Creators: name: Keating, J. P.
name: Linden, N.
name: Matthews, J. C. F.
name: Winter, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The exponential speed-up of quantum walks on certain graphs, relative to classical particles diffusing on the same graph, is a striking observation. It has suggested the possibility of new fast quantum algorithms. We point out here that quantum mechanics can also lead, through the phenomenon of localization, to exponential suppression of motion on these graphs (even in the absence of decoherence). In fact, for physical embodiments of graphs, this will be the generic behaviour. It also has implications for proposals for using spin networks, including spin chains, as quantum communication channels.
description: 4 pages, 1 eps figure. Updated references and cosmetic changes for v2
Fast Modular Exponentiation Using Residue Domain Representation: A Hardware Implementation and Analysis
Creators: name: Nguyen, Christopher Dinh
Publisher: name: Maryland Shared Open Access Repository
Year: 2013
Subjects: exponentiation
FPGA
modular
number
residue
system

description: Using modular exponentiation as an application, we engineered on FPGA fabric and analyzed the first implementation of two arithmetic algorithms in Reduced-Precision Residue Number Systems (RP-RNS): the partial-reconstruction algorithm and quotient-first scaling algorithm. Residue number systems (RNS) provide an alternative representation to the binary system for computation.  They offer full parallel computation for addition, subtraction, and multiplication.  However, base extension, division, and sign detection become harder operations.  Phatak's RP-RNS uses a time-memory trade-off to achieve O(lg N) running time for base extension and scaling, where N is the bit-length of the operands, compared with Kawamura's Cox-Rower architecture and its derivatives, which appear to take O(N) steps and therefore O(N) delay to the best of our knowledge. We implemented the fully parallel RP-RNS architecture based on Phatak's description and architecture diagrams.  Our design decisions included distributing the lookup tables among each channel, removing the adder trees, and removing the parallel table access thus trading size for speed.  In retrospect, we should have hosted the tables in memory off the FPGA. We measured the FPGA utilization, storage size, and cycle counts.  The data we present, though less than optimal, confirms the theoretical trends calculated by Phatak.  FPGA utilization grows proportional K log(K) where K is the number of hardware channels.  Storage grows proportional to O(N^3 lg lg N). When using Phatak's recommendations, cycle count grows proportional to O(lg N). Our contributions include documentation of our design, architecture, and implementation; a detailed testing methodology; and performance data based on our implementation to enable others to replicate our implementation and findings.
No-Cloning and No-Deleting theorems through the existence of Incomparable states under LOCC
Creators: name: Bhar, Amit
name: Chattopadhyay, Indrani
name: Sarkar, Debasis
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: No-Cloning and No-Deleting theorems are verified with the constraint on local state transformations via the existence of incomparable states. Assuming the existence of exact cloning or deleting operation defined on a minimum number of two arbitrary states, an incomparable pair of states of the joint system between two parties can be made to compare under deterministic LOCC. We have restricted our proof with the assumption that the machine states of the cloning or deleting operations do not keep any information about the input states. We use the same setting to establish the no-cloning and no-deleting theorems via incomparability that supports the reciprocity of the two operations in their operational senses. The work associates the impossibility of operations with the evolution of an entangled system by LOCC.
description: 4 pages, no figures, revtex format, accepted in Quantum Information Processing
Newly Identified Star Clusters in M33. I. Integrated Photometry and Color-Magnitude Diagrams
Creators: name: Sarajedini, Ata
name: Barker, M. K.
name: Geisler, Doug
name: Harding, Paul
name: Schommer, Robert
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present integrated photometry and color-magnitude diagrams (CMDs) for 24 star clusters in M33, of which 12 were previously uncataloged. These results are based on Advanced Camera for Surveys observations from the Hubble Space Telescope of two fields in M33. Our integrated V magnitudes and V-I colors for the previously identified objects are in good agreement with published photometry. We are able to estimate ages for 21 of these clusters using features in the CMDs, including isochrone fitting to the main sequence turnoffs for 17 of the clusters. Comparisons of these ages with the clusters' integrated colors and magnitudes suggest that simple stellar population models perform reasonably well in predicting these properties.
description: 15 pages, 30 figures, accepted for publication in The Astronomical Journal. High resolution version available at http://www.astro.ufl.edu/~ata/M33_new_clusters1.pdf
d-Dimensional generalization of the point canonical transformation for a quantum particle with position-dependent mass
Creators: name: Mustafa, Omar
name: Mazharimousavi, S. Habib
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The d-dimensional generalization of the point canonical transformation for a quantum particle endowed with a position-dependent mass in Schrodinger equation is described. Illustrative examples including; the harmonic oscillator, Coulomb, spiked harmonic, Kratzer, Morse oscillator, Poschl-Teller and Hulthen potentials are used as reference potentials to obtain exact energy eigenvalues and eigenfunctions for target potentials at different position-dependent mass settings.
description: 14 pages, no figures, to appear in J. Phys. A: Math. Gen
Synthesis and Magnetic Properties of Cobalt Ferrite (CoFe2O4) Nanoparticles Prepared by Wet Chemical Route
Creators: name: Maaz, K.
name: Mumtaz, Arif
name: Hasanain, S. K.
name: Ceylan, Abdullah
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Magnetic nanoparticles of cobalt ferrite have been synthesized by wet chemical method using stable ferric and cobalt salts with oleic acid as the surfactant. X-ray Diffraction (XRD) and Transmission Electron Microscope (TEM) confirmed the formation of single phase cobalt ferrite nanoparticles in the range 15-48nm depending on the annealing temperature and time. The size of the particles increases with annealing temperature and time while the coercivity goes through a maximum, peaking at around 28nm. A very large coercivity (10.5kOe) is observed on cooling down to 77K while typical blocking effects are observed below about 260K. The high field moment is observed to be small for smaller particles and approaches the bulk value for large particles.
description: 18 pages, accepted in JMMM, (May, 2006)
Corrosion Protection Characterization of an Al/Au/ZnO Anode
Creators: name: Stevens, Brian Wayne
Publisher: name: Maryland Shared Open Access Repository
Year: 2014
Subjects: Anode
Corrosion Protection
Electrochemistry
Hopeite
Phosphating
Sol-gel

description: Effective protection of power sources from corrosion is critical in the development of abiotic fuel cells, biobatteries and biofuel cells for implantable bioelectronics. Corrosion of these bioelectronic devices result in device inability to generate bioelectricity. Al/Au/ZnO was considered as a possible anode for the development for abiotic fuel cell applications. The protective abilities of corrosive resistant hopeite films formed on the surface of the Al/Au/ZnO anode in various electrolyte environments were examined by electrochemical methods. The presence of phosphate and NaCl in biological fluids allows for the formation of hopeite films that prevent corrosion. Highly protective films formed on the Al/Au/ZnO anode in physiological saline environment resulted in 98.5% corrosion protective efficiency, thereby demonstrating that the formation of hopeite films are effective in the prevention of anode corrosion.
Phosphorus release from a slow-release fertilizer under simulated stream conditions
Creators: name: Sterling, Megan Sheryl
Publisher: name: University of British Columbia
Year: 2009

description: A new slow-release fertilizer has been developed to restore productivity in nutrient deficient streams. The product (7-40-0; N-P₂O₅-K₂O) was studied to determine physical and chemical conditions which might inhibit phosphate release. In laboratory analyses, hardness (> 40 mg Ca²⁻-L⁻¹) and humic material (> 100 colour units) complexed phosphate and inhibited its dissolution from the pellets; pH, alkalinity and iron had less effects on phosphate solubility. A series of indoor trough experiments indicated fertilizer dissolution was independent of velocity (0.15-0.30 m/s), pellet size (2-9 g) and water temperature (8-14.5 °C). Fertilizer treatments (0.5-5 μg P L⁻¹) in outdoor trough experiments increased periphyton abundance and altered the dominant diatom species. A saturation level for periphyton growth and biomass was achieved at ~ 1.0 μg L⁻¹ orthophosphate from May- June; in June-July growth and biomass increased proportionally to fertilizer additions. Relationships developed during these controlled experiments demonstrate streams having < 40 mg L⁻¹ calcium, < 100 colour units and ranges within other variables tested are optimal for slow-release fertilizer additions.
Uncertainties in (E)UV model atmosphere fluxes
Creators: name: Rauch, Thomas
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: During the comparison of synthetic spectra calculated with two NLTE model atmosphere codes, namely TMAP and TLUSTY, we encounter systematic differences in the EUV fluxes due to the treatment of level dissolution by pressure ionization. Systematic differences may occur due to a code-specific cutoff frequency of the H I Lyman bound-free opacity. This is the case for TMAP and TLUSTY. Both codes predict the same flux level at wavelengths lower than about 1500 A for stars with effective temperatures below about 30000K only, if the same cutoff frequency is chosen. In the case of Sirius B, we demonstrate an uncertainty in modeling the EUV flux reliably in order to challenge theoreticians to improve the theory of level dissolution. The theory of level dissolution in high-density plasmas, which is available for hydrogen only should be generalized to all species. Especially, the cutoff frequencies for the bound-free opacities should be defined in order to make predictions of UV fluxes more reliable.
description: 3 pages, 5 figures
Stationary Solutions of Liouville Equations for Non-Hamiltonian Systems
Creators: name: Tarasov, Vasily E.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: We consider the class of non-Hamiltonian and dissipative statistical systems with distributions that are determined by the Hamiltonian. The distributions are derived analytically as stationary solutions of the Liouville equation for non-Hamiltonian systems. The class of non-Hamiltonian systems can be described by a non-holonomic (non-integrable) constraint: the velocity of the elementary phase volume change is directly proportional to the power of non-potential forces. The coefficient of this proportionality is determined by Hamiltonian. The constant temperature systems, canonical-dissipative systems, and Fermi-Bose classical systems are the special cases of this class of non-Hamiltonian systems.
description: 22 pages
Understanding variability of solar Balmer lines
Creators: name: Criscuoli, Serena
name: Marchenko, Sergey
name: DeLand, Matthew
name: Choudary, Debi
name: Kopp, Greg
Publisher: name: Zenodo
Year: 2021
Subjects: Balmer lines
Stellar variability
Stellar Chromosphere
Solar Irradiance variability
Magnetic activity
Activity Indices

description: Precise, adequately high-cadence, long-term records of spectral variability at different temporal scales lead to better understanding of a wide variety of phenomena including stellar atmospheres and dynamos, evolution of the magnetic fields on a stellar photosphere, convective motions, and rotational periods. These, in turn, are fundamental for the detectability of exoplanets, the characterization of their atmospheres and habitability, as well as characterization of stellar magnetospheres and winds. The Sun, viewed as a star via spectral irradiance measurements, offers a means of exploring such measurements while also having the imaging capability to help discern the causes of observed spectral variations. In this study, we investigate the variability of solar Balmer lines (H-α, β, γ and δ) observed by space-borne radiometers, combining these precise, long-term observations with abundant, high-resolution data from the ground-based NSO/ISS spectrograph. We relate the detected variability to magnetic features on the solar disk. We find that on solar-rotation timescales (~month), the Balmer line activity indices (defined as line-core to line-wing ratios) closely follow variations in the total solar irradiance (which is predominantly photospheric), thus frequently (specifically, during passages of big sunspot groups) deviates from behavior of the line-activity indices that track chromospheric activity levels. At longer timescales (years), the correlation with chromospheric indices increases, with periods of low- or even anti- correlation found at intermediate timescales. Comparisons with Balmer-line variability patterns obtained from a semi-empirical model indicate the periods of low/anti correlations should be attributed to the increase of the relative abundance of network, which affects the Ca-index while leaving almost un-altered the Hα-index.
KMT-2017-BLG-2820 and the Nature of the Free-Floating Planet Population
Creators: name: Ryu, Yoon-Hyun
name: Mróz, Przemek
name: Gould, Andrew
name: Hwang, Kyu-Ha
name: Kim, Hyoun-Woo
name: Yee, Jennifer C.
name: Albrow, Michael D.
name: Chung, Sun-Ju
name: Jung, Youn Kil
name: Shin, In-Gu
name: Shvartzvald, Yossi
name: Zang, Weicheng
name: Cha, Sang-Mok
name: Kim, Dong-Jin
name: Kim, Seung-Lee
name: Lee, Chung-Uk
name: Lee, Dong-Joo
name: Lee, Yongseok
name: Park, Byeong-Gon
name: Han, Cheongho
name: Pogge, Richard W.
name: Udalski, Andrzej
name: Poleski, Radek
name: Skowron, Jan
name: Szymański, Michał K.
name: Soszyński, Igor
name: Pietrukowicz, Paweł
name: Kozłowski, Szymon
name: Ulaczyk, Krzysztof
name: Rybicki, Krzysztof A.
name: Iwanek, Patryk
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We report a new free-floating planet (FFP) candidate, KMT-2017-BLG-2820, with Einstein radius $θ_\e\simeq 6\,\muas$, lens-source relative proper motion $μ_\rel \simeq 8\,\masyr$, and Einstein timescale $t_\e=6.5\,$hr. It is the third FFP candidate found in an ongoing study of giant-source finite-source point-lens (FSPL) events in the KMTNet data base, and the sixth FSPL FFP candidate overall. We find no significant evidence for a host. Based on their timescale distributions and detection rates, we argue that five of these six FSPL FFP candidates are drawn from the same population as the six point-source point-lens (PSPL) FFP candidates found by \citet{mroz17} in the OGLE-IV data base. The $θ_\e$ distribution of the FSPL FFPs implies that they are either sub-Jovian planets in the bulge or super-Earths in the disk. However, the apparent "Einstein Desert" ($10\laθ_\e/\muas\la 30$) would argue for the latter. Whether each of the 12 (6 FSPL and 6 PSPL) FFP candidates is truly an FFP, or simply a very wide-separation planet, can be determined at first adaptive optics (AO) light on 30m telescopes, and earlier for some. If the latter, a second epoch of AO observations could measure the projected planet-host separation with a precision ${\cal O}(10\,\au)$. At the present time, the balance of evidence favors the unbound-planet hypothesis.
description: 35 pages, 7 figures, 1 Table
Exact finite size spectrum in super sine-Gordon model
Creators: name: Hegedus, Arpad
name: Ravanini, Francesco
name: Suzuki, Junji
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present the coupled nonlinear integral equations (NLIE) governing the finite size effects in N=1 super sine-Gordon model for the vacuum as well as for the excited states. Their infrared limit correctly yields the scattering data of the super sine-Gordon S-matrix conjectured by Ahn. Ultraviolet analysis is in agreement with the expected conformal data of c=3/2 CFT. Conformal perturbation theory further corroborates this result.
description: 28 pages, LaTeX
Simulation of Rapidly Varying and Dry Bed Flow using the Serre equations solved by a Finite Element Volume Method.
Creators: name: Pitt, Jordan
Publisher: name: The Australian National University
Year: 2019

description: Recent research in numerical wave modelling has focused on developing computational methods for solving non-linear dispersive wave equations as an extension to methods solving the non-linear shallow water wave equations. By including extra terms that allow for dispersion these equations more accurately model water waves than the shallow water wave equations. An interesting example of these non-linear dispersive equations for modelling water waves are the Serre equations. In this work an efficient and robust numerical method for the one-dimensional Serre equations was developed. This method uses a finite element method to solve an elliptic equation and a finite volume method to solve the remaining conservation equations and is hence termed the Finite Element Volume Method (FEVM). The use of a finite element method and a finite volume method makes the FEVM adaptable to unstructured meshes and parallelisable. The FEVM recovers the lake at rest steady state and accurately simulates flows over dry beds. The convergence and dispersion properties of the FEVM were determined using a linear analysis. The FEVM was validated against analytic and forced solutions of the Serre equations, demonstrating its convergence and conservation properties. Finally, the method was validated against experimental data for a wide array of physical scenarios, establishing its utility as a realistic model. All these analyses and validations were also conducted on other methods allowing comparisons between them and the FEVM. The FEVM was found to be the most robust of these methods whilst being adequately accurate. Since the FEVM can be extended to unstructured meshes with parallelised code it is the most promising of the studied methods for solving the Serre equations in two dimensions.
Multi-wavelength observations of Galactic hard X-ray sources discovered by INTEGRAL. I. The nature of the companion star
Creators: name: Chaty, Sylvain
name: Rahoui, Farid
name: Foellmi, Cédric
name: Tomsick, John A.
name: Rodriguez, Jérôme
name: Walter, Roland
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Context: The INTEGRAL hard X-ray observatory has revealed an emerging population of highly obscured X-ray binary systems through multi-wavelength observations. Previous studies have shown that many of these sources are high-mass X-ray binaries hosting neutron stars orbiting around luminous and evolved companion stars. Aims: To better understand this newly-discovered population, we have selected a sample of sources for which an accurate localisation is available to identify the stellar counterpart and reveal the nature of the companion star and of the binary system. Methods: We performed an intensive study of a sample of thirteen INTEGRAL sources, through multi-wavelength optical to NIR photometric and spectroscopic observations, using EMMI and SofI instruments at the ESO NTT telescope. We performed accurate astrometry and identified candidate counterparts for which we give the optical and NIR magnitudes. We detected many spectral lines allowing us to determine the spectral type of the companion star. We fitted with stellar black bodies the mid-infrared to optical spectral energy distributions of these sources. From the spectral analysis and SED fitting we identified the nature of the companion stars and of the binary systems. (abridged).
description: A&A in press; The official date of acceptance is 15/12/2007; 25 pages, 6 figures, 8 tables. New version with language editing required by editor
The Southern Okanagan Land Co. Ltd. Plan of Subdivision of a Portion of Ellis Estate Adjoining Penticton, B.C., [1908]
Creators: name: Latimer, F.H.
Publisher: name: The University of British Columbia
Year: 2017

description: Map of Penticton city lots; date of creation thought to be 1908; stamped "Kendall & Mason Real Estate, Etc. Penticton, B.C.," Chief Engineer F.H. Latimer. Four lots are marked with blue pencil X's, possibly lots considered for purchase by James Goldie.
The period-luminosity relation for type II Cepheids in globular clusters
Creators: name: Matsunaga, Noriyuki
name: Fukushi, Hinako
name: Nakada, Yoshikazu
name: Tanabe, Toshihiko
name: Feast, Michael W.
name: Menzies, John W.
name: Ita, Yoshifusa
name: Nishiyama, Shogo
name: Baba, Daisuke
name: Naoi, Takahiro
name: Nakaya, Hidehiko
name: Kawadu, Takahiro
name: Ishihara, Akika
name: Kato, Daisuke
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report the result of our near-infrared observations (JHKs) for type II Cepheids (including possible RV Tau stars) in galactic globular clusters. We detected variations of 46 variables in 26 clusters (10 new discoveries in seven clusters) and present their light curves. Their periods range from 1.2 d to over 80 d. They show a well-defined period-luminosity relation at each wavelength. Two type II Cepheids in NGC6441 also obey the relation if we assume the horizontal branch stars in NGC6441 are as bright as those in metal-poor globular clusters in spite of the high metallicity of the cluster. This result supports the high luminosity which has been suggested for the RR Lyr variables in this cluster. The period-luminosity relation can be reproduced using the pulsation equation (P sqrt(rho)=Q) assuming that all the stars have the same mass. Cluster RR Lyr variables were found to lie on an extrapolation of the period-luminosity relation. These results provide important constraints on the parameters of the variable stars. Using Two Micron All-Sky Survey (2MASS) data, we show that the type II Cepheids in the Large Magellanic Cloud (LMC) fit our period-luminosity relation within the expected scatter at the shorter periods. However, at long periods ($P>40$ d, i.e. in the RV Tau star range) the LMC field variables are brighter by about one magnitude than those of similar periods in galactic globular clusters. The long-period cluster stars also differ from both these LMC stars and galactic field RV Tau stars in a colour-colour diagram. The reasons for these differences are discussed.
description: 13 pages, 8 figures, Accepted for publication in MNRAS
Spin orientation of a two-dimensional electron gas by a high-frequency electric field
Creators: name: Tarasenko, S. A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Coupling of spin states and space motion of conduction electrons due to spin-orbit interaction opens up possibilities for manipulation of the electron spins by electrical means. It is shown here that spin orientation of a two-dimensional electron gas can be achieved by excitation of the carriers with a linearly polarized high-frequency electric field. In (001)-grown quantum well structures excitation with in-plane ac electric field induces orientation of the electron spins along the quantum well normal, with the spin sign and the magnitude depending on the field polarization.
description: 5 pages, 1 figure
The dynamics of Machiavellian intelligence
Creators: name: Gavrilets, Sergey
name: Vose, Aaron
Publisher: name: arXiv
Year: 2006
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: The "Machiavellian intelligence" hypothesis (or the "social brain" hypothesis) posits that large brains and distinctive cognitive abilities of humans have evolved via intense social competition in which social competitors developed increasingly sophisticated "Machiavellian" strategies as a means to achieve higher social and reproductive success. Here we build a mathematical model aiming to explore this hypothesis. In the model, genes control brains which invent and learn strategies (memes) which are used by males to gain advantage in competition for mates. We show that the dynamics of intelligence has three distinct phases. During the dormant phase only newly invented memes are present in the population. During the cognitive explosion phase the population's meme count and the learning ability, cerebral capacity (controlling the number of different memes that the brain can learn and use), and Machiavellian fitness of individuals increase in a runaway fashion. During the saturation phase natural selection resulting from the costs of having large brains checks further increases in cognitive abilities. Overall, our results suggest that the mechanisms underlying the "Machiavellian intelligence" hypothesis can indeed result in the evolution of significant cognitive abilities on the time scale of 10 to 20 thousand generations. We show that cerebral capacity evolves faster and to a larger degree than learning ability. Our model suggests that there may be a tendency toward a reduction in cognitive abilities (driven by the costs of having a large brain) as the reproductive advantage of having a large brain decreases and the exposure to memes increases in modern societies.
description: A revised version has been published by PNAS
Time evolution of relativistic d + Au and Au + Au collisions
Creators: name: Wolschin, Georg
name: Biyajima, Minoru
name: Mizoguchi, Takuya
name: Suzuki, Naomichi
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The evolution of charged-particle production in collisions of heavy ions at relativistic energies is investigated as function of centrality in a nonequilibrium-statistical framework. Precise agreement with recent d + Au and Au + Au data at sqrt(s_NN) = 200 GeV is found in a Relativistic Diffusion Model with three sources for particle production. Only the midrapidity source comes very close to local equilibrium, whereas the analyses of the overall pseudorapidity distributions show that the systems remain far from statistical equilibrium.
description: 16 pages, 5 figures, 1 table
Raitman Olgeta: Negotiating What it Means to be a ‘Good’ Man in Contemporary Papua New Guinea
Creators: name: Lusby, Stephanie
Publisher: name: The Australian National University
Year: 2018
Subjects: masculinity
gender studies
Papua New Guinea
behaviour change
gender-based violence
HIV and AIDS
violence prevention
ethnographies of violence
precarity
precariousness

description: This thesis investigates ambivalences and tensions in the ways that men and their communities frame what it means to be a raitman, a ‘real’ man or ‘good’ man, in contemporary East New Britain, Papua New Guinea. In looking at the refraction of aspirational masculinity through lived experiences of men and their communities, I argue that to affect change, there is a need for more nuanced and politicised conceptualisations of masculinities in the context of campaigns for equal gender rights. The figure of the raitman is a common trope in Papua New Guinean and international campaigns to address HIV and AIDS, sikAIDS in Tok Pisin, and violence against women. This figure is imagined as a perfect role model who is compliant with the directives of prevention slogans: a wearer of condoms, a faithful partner, non-violent and in control of everything from anger to sexual appetite, to alcohol consumption. In reality, these tropes manifest unevenly and ambivalently in the lives of men, their partners and their broader communities as they are refracted through personal and collective aspirations; loving and complex relationships with peers, families and intimate partners; existing normative ideas of the most esteemed way of being a man; and collective efforts to navigate structural violence and uncertainty. Within this milieu, I consider how men’s efforts to navigate ideas of aspirational masculinity, and their desire to position themselves as raitman, impact upon how they relate to and position women, and what this can tell us about efforts to address issues of gender violence and inequality in Papua New Guinea. The thesis takes the transnational campaign framing of good masculinity as a starting point and asks how these attempts to influence gender norms and practices are heard and adopted, or subverted, in everyday encounters. The research draws upon ethnographic fieldwork conducted in urban, semi-rural and rural-remote field sites in 2012-13. The thesis is anchored in feminist scholarship and engages with literature from anthropology, geography and development studies to complement the narratives of women, men and communities heard through the fieldwork. In doing so, the thesis provides an account of how gendered norms intersect with, and are made malleable by, individual and collective development aspirations, and experiences of structural violence and precarity.
Superprocesses with Dependent Spatial Motion and General Branching Densities
Creators: name: Dawson, Donald A.
name: Li, Zenghu
name: Wang, Hao
Publisher: name: arXiv
Year: 2006
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60J80

description: We construct a class of superprocesses by taking the high density limit of a sequence of interacting-branching particle systems. The spatial motion of the superprocess is determined by a system of interacting diffusions, the branching density is given by an arbitrary bounded non-negative Borel function, and the superprocess is characterized by a martingale problem as a diffusion process with state space $M(\IR)$, improving and extending considerably the construction of Wang (1997, 1998). It is then proved in a special case that a suitable rescaled process of the superprocess converges to the usual super Brownian motion. An extension to measure-valued branching catalysts is also discussed.
IN00030 - IN00030 Gadhwa Donation 4 of the Time of Kumaragupta I
Creators: name: Balogh, Dániel
Publisher: name: Zenodo
Year: 2021

description: [caption id="attachment_6684" align="alignnone" width="300"] Gadhwa (गढ़वा किला, शंकरगढ़ Allahabad district). Inscriptions of Candragupta and Kumāragupta (Zenodo).[/caption]
Using Drones to Enhance Carbon Fluxes Simulation in Agricultural Ecosystems
Creators: name: Guo, Xuerui
name: Bayat, Bagher
name: Bates, Jordan
name: Montzka, Carsten
Publisher: name: Forschungzentrum Jülich
Year: 2024

description: UAV-based Remote Sensing Methods for Monitoring Vegetation, Cologne, Germany, 30 Sep 2024 - 1 Oct 2024