cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Optimal experimental design and some related control problems
Creators: name: Pronzato, Luc
Publisher: name: arXiv
Year: 2008
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: This paper traces the strong relations between experimental design and control, such as the use of optimal inputs to obtain precise parameter estimation in dynamical systems and the introduction of suitably designed perturbations in adaptive control. The mathematical background of optimal experimental design is briefly presented, and the role of experimental design in the asymptotic properties of estimators is emphasized. Although most of the paper concerns parametric models, some results are also presented for statistical learning and prediction with nonparametric models.
description: Available at http://www.elsevier.com/locate/automatica
title: State Road Fund Revenue Collection Processes
title: Differences and Opportunities of Improved Efficiency
titleType: Subtitle
Creators: name: Eger III, Robert J.
name: Hackbart, Merl M.
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 2001
Subjects: subject: Transportation Engineering

description: Research regarding the administration and collection of road fund revenues has focused on gaining an understanding of the motivations for tax evasion, methods of evasion, and estimates of the magnitude of evasion for individual states. To our knowledge, little attention has been focused on the impact road fund collection, assessment, audit, and enforcement processes have on tax evasion. The purpose of this study is to review the current road fund assessment, collection, audit, and enforcement processes and procedures and to develop recommendations to improve the efficiency and effectiveness of the process.
"Lass Dich von Gott verwandeln, dann wirst Du die Welt verwandeln"
Creators: name: Enns, Fernando
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 55 Nr. 4 (2006): Ökumenische Rundschau, Band 55, Heft 4
Magnetism in Geometrically Frustrated YMnO3 Under Hydrostatic Pressure Studied with Implanted Muons
Creators: name: Lancaster, T.
name: Blundell, S. J.
name: Andreica, D.
name: Janoschek, M.
name: Roessli, B.
name: Gvasaliya, S. N.
name: Conder, K.
name: Pomjakushina, E.
name: Brooks, M. L.
name: Baker, P. J.
name: Prabhakaran, D.
name: Hayes, W.
name: Pratt, F. L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The rare-earth ferroelectromagnet YMnO3 consists of weakly coupled triangular layers of S=2 spins. Below T_N ~ 70 K muon-spin relaxation data show two oscillatory relaxing signals due to magnetic order, with no relaxing signal resolvable (which would be expected for different coexisting spin distributions). The transition temperature T_N increases with applied hydrostatic pressure, even though the ordered moment decreases. These results suggest that pressure increases both the exchange coupling between the layers and the frustration within the layers.
description: 4 pages, 3 figures, v2 (updated figures and minor changes to text)
Phase II of the LAMOST-Kepler/K2 survey. I. Time series of medium-resolution spectroscopic observations
Creators: name: Zong, Weikai
name: Fu, Jian-Ning
name: De Cat, Peter
name: Wang, Jiaxin
name: Shi, Jianrong
name: Luo, Ali
name: Zhang, Haotong
name: Frasca, A.
name: Żakowicz, J. Molenda-
name: Gray, R. O.
name: Corbally, C. J.
name: Catanzaro, G.
name: Cang, Tianqi
name: Wang, Jiangtao
name: Chen, Jianjun
name: Hou, Yonghui
name: Liu, Jiaming
name: Niu, Hubiao
name: Pan, Yang
name: Tian, Hao
name: Yan, Hongliang
name: Zhang, Yong
name: Zuo, Heng
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Phase \RNum{2} of the LAMOST-{\sl Kepler/K}2 survey (LK-MRS), initiated in 2018, aims at collecting medium-resolution spectra ($R\sim7,500$; hereafter MRS) for more than $50,000$ stars with multiple visits ($\sim60$ epochs) over a period of 5 years (2018 September to 2023 June). We selected 20 footprints distributed across the {\sl Kepler} field and six {\sl K}2 campaigns, with each plate containing a number of stars ranging from $\sim2,000$ to $\sim 3,000$. During the first year of observations, the LK-MRS has already collected $\sim280,000$ and $\sim369,000$ high-quality spectra in the blue and red wavelength range, respectively. The atmospheric parameters and radial velocities for $\sim259,000$ spectra of $21,053$ targets were successfully calculated by the LASP pipeline. The internal uncertainties for the effective temperature, surface gravity, metallicity, and radial velocity are found to be $100$\,K, $0.15$\,dex, $0.09$\,dex, and $1.00$\,km\,s$^{-1}$, respectively. We found $14,997$, $20,091$, and $1,514$ stars in common with the targets from the LAMOST low-resolution survey (LRS), GAIA and APOGEE, respectively, corresponding to a fraction of $\sim70\%$, $\sim95\%$ and $\sim7.2\%$. In general, the parameters derived from LK-MRS spectra are consistent with those obtained from the LRS and APOGEE spectra, but the scatter increases as the surface gravity decreases when comparing with the measurements from APOGEE. A large discrepancy is found with the GAIA values of the effective temperature. The comparisons of radial velocities of LK-MRS to GAIA and LK-MRS to APOGEE nearly follow an Gaussian distribution with a mean $μ\sim1.10$ and $0.73$\,km\,s$^{-1}$, respectively.
description: 24 pages, 15 figures, 4 tables, ApJS, accepted
Opus 25
Creators: name: Bolden, Benjamin
Publisher: name: University of British Columbia
Year: 2009

description: Opus 25 is a collection of compositions which I created between September 1995 and April 1997. Instrumentation varies; there are works for choirs, chamber ensembles, solo voice, solo harp, solo piano, and orchestra. All the works included in this collection have been performed at some point during this same period, and recordings of these performances can be found on the accompanying cassette.
Medical Entity Linking using Triplet Network
Creators: name: Mondal, Ishani
name: Purkayastha, Sukannya
name: Sarkar, Sudeshna
name: Goyal, Pawan
name: Pillai, Jitesh
name: Bhattacharyya, Amitava
name: Gattu, Mahanandeeshwar
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computation and Language (cs.CL)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Entity linking (or Normalization) is an essential task in text mining that maps the entity mentions in the medical text to standard entities in a given Knowledge Base (KB). This task is of great importance in the medical domain. It can also be used for merging different medical and clinical ontologies. In this paper, we center around the problem of disease linking or normalization. This task is executed in two phases: candidate generation and candidate scoring. In this paper, we present an approach to rank the candidate Knowledge Base entries based on their similarity with disease mention. We make use of the Triplet Network for candidate ranking. While the existing methods have used carefully generated sieves and external resources for candidate generation, we introduce a robust and portable candidate generation scheme that does not make use of the hand-crafted rules. Experimental results on the standard benchmark NCBI disease dataset demonstrate that our system outperforms the prior methods by a significant margin.
description: ClinicalNLP@NAACL 2019
title: Community Initiatives and the Reshaping of Collaborative Planning Practices in Indonesia: The Case of Creative Kampong
Creators: name: Permana, Chrisna Triehadi
Publisher: name: University of Liverpool Repository
Year: 2025

description: As planning is continuously moving into more collaborative-led approaches, the discourses around community involvement in planning practices have been progressing significantly. Community initiatives, in various forms, become the most realisation of community involvement, allowing the community to have more independence to articulate their aspirations and stronger power to negotiate their interests and strategies to the government within collective decision-making processes and consensus-oriented plans. Community initiatives also embrace the community to work with other non-governmental stakeholders to support each other towards certain development initiatives which may have lacked government support. Whilst their emergence in the Western countries have been enormous, community initiatives began to diffuse in the Global South, promoting collaborative planning practices that meet specific potentials and challenges, such as authoritarian governments, socio-cultural diversities, and informal practices in many aspects. There has been limited research discussing the potentials and challenges from the actual processes of how such initiatives reshaped planning practices in neighbourhood areas in the Global South. With attempts to enrich the lack of empirical studies, this thesis provides a research of the community initiatives in neighbourhood areas in Indonesia. The creative kampong initiatives in Indonesia, whereby creatively-themed community initiatives have been encouraged with the view of transforming the neighbourhood, are used as a research window through which to examine the process of how community initiative reshaped planning practice in the neighbourhood areas. Against a backdrop of decentralisation in post-reform Indonesia, the central argument is that such initiatives lead to a gradual transformation of neighbourhood planning, especially from government-led to more collaborative-led practices. In doing this examination, a governance analysis is provided. This approach examines planning practice on its changes within three dimensions, specific episodes, governance processes, and embedded cultures. A case study method, whereby information is collected through in-depth interviews with key stakeholders, documentary review, and resident survey, was used and involved two cases. This thesis concludes that in the unstable power relations, structures, and systems in the neighbourhood areas, social and traditional values which remain acculturated in local community’s organisations, norms, and routines, play a crucial role in determining the shape of collaborative planning practices.
Universal dynamics of superradiant phase transition in the anisotropic quantum Rabi model
Creators: name: Jiang, Xunda
name: Lu, Bo
name: Han, Chengyin
name: Fang, Ruihuan
name: Zhao, Minhua
name: Ma, Zhu
name: Guo, Tian
name: Lee, Chaohong
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate the universally non-equilibrium dynamics of superradiant phase transition in the anisotropic quantum Rabi model. By introducing position and momentum operators, we obtain the ground states and their excitation gaps for both normal and superradiant phases via perturbation theory. We analytically extract the critical exponents from the excitation gap and the diverging length scale near the critical point, and find that the critical exponents are independent upon the anisotropy ratio. Moreover, by simulating the real-time dynamics across the critical point, we numerically extract the critical exponents from the phase transition delay and the diverging length scale, which are well consistent with the analytical ones. Our study provides a dynamic way to explore universal critical behaviors in the quantum Rabi model.
description: 9 pages, 5 figures
Asymptotic behaviour of a family of gradient algorithms in R^d and Hilbert spaces
Creators: name: Pronzato, Luc
name: Wynn, Henry P.
name: Zhigljavsky, Anatoly A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: 90C25, 68Q25

description: The asymptotic behaviour of a family of gradient algorithms (including the methods of steepest descent and minimum residues) for the optimisation of bounded quadratic operators in R^d and Hilbert spaces is analyzed. The results obtained generalize those of Akaike (1959) in several directions. First, all algorithms in the family are shown to have the same asymptotic behaviour (convergence to a two-point attractor), which implies in particular that they have similar asymptotic convergence rates. Second, the analysis also covers the Hilbert space case. A detailed analysis of the stability property of the attractor is provided.
description: The original publication is available at http://www.springerlink.com
PSDI Webinar: FAIR Data for the Biomolecular Simulation Community - Slides
Creators: name: Gebbie-Rayet, James
name: Kalayan, Jas
Publisher: name: Zenodo
Year: 2024

description: In the Physical Sciences Data Infrastructure (PSDI) our first round pathfinders are exploratory pieces of work looking at an application area where PSDI could develop tools to enhance the research infrastructure. These are the slides from the Pathfinder 4: FAIR Data for the Biomolecular Simulation Community webinar presented by James Gebbie-Rayet and Jas Kalayan which was run on 18th October 2023. https://www.psdi.ac.uk/event/webinar-psdi-pf4/

The recording of this webinar is available on YouTube: https://youtu.be/FA_rVv-hZig

Abstract: The biomolecular simulation community produces vast amounts of data to study complex biological systems at atomic scales. Yet, how we store, share, and reuse our data is not well defined. One problem is that our simulation pipelines are difficult to replicate without detailed descriptions of each step. Another problem is the data files we produce can often be too large to store on the national compute facilities, which most of this data is produced on. In this webinar we present possible solutions to address these two problems; firstly, a software tool to record data provenance towards FAIR [1] compliant formats, and the other an online data repository to store and share this data. For reproducible data, we utilise the powerful AiiDA Python infrastructure [2,3] to develop our aiida-gromacs plugin [4], for tracking all inputs and outputs from simulation protocols performed with the GROMACS MD engine [5]. We show how aiida-gromacs can be used with minimal changes to how researchers already work, to allow for easy adoption of provenance tools within our community. To address the findable and accessible components of FAIR compliancy, we also briefly present our prototype data infrastructure. Our aim is to allow researchers to directly upload data produced via aiida-gromacs onto our database for easy access, querying and visualisation of simulation data/metadata online. We encourage the biomolecular simulation community to try aiida-gromacs, we have installation guides and tutorials available online. Please have a go, contribute, and provide us with feedback for improving aiida-gromacs! [1] Wilkinson, Mark D. et al. (2016). Scientific Data, 3(1), 160018. [2] https://www.aiida.net/sections/about.html [3] Huber, Sebastiaan P. et al. (2020). Scientific Data, 7(1), 300. [4] https://aiida-gromacs.readthedocs.io/en/latest/index.html [5] https://www.gromacs.org/
Characterization of a Disordered Above Room Temperature Skyrmion Material Co8Zn8Mn4
Creators: name: Henderson, M. E.
name: Beare, J.
name: Sharma, S.
name: Bleuel, M.
name: Clancy, P.
name: Cory, D. G.
name: Huber, M. G.
name: Marjerrison, C. A.
name: Pula, M.
name: Sarenac, D.
name: Smith, E. M.
name: Zhernenkov, K.
name: Luke, G. M.
name: Pushin, D. A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Topologically non trivial spin textures host great promise for future spintronic applications. Skyrmions in particular are of burgeoning interest owing to their nanometric size, topological protection, and high mobility via ultra-low current densities. It has been previously reported through magnetic susceptibility, microscopy, and scattering techniques that Co$_{8}$Zn$_{8}$Mn$_{4}$ forms an above room temperature triangular skyrmion lattice. Here we report the synthesis procedure and characterization of a polycrystalline Co$_{8}$Zn$_{8}$Mn$_{4}$ bulk sample. We employ powder x-ray diffraction, backscatter Laue diffraction, and neutron diffraction as characterization tools of the crystallinity of the samples, while magnetic susceptibility and Small Angle Neutron Scattering (SANS) measurements are performed to study the skyrmion phase. Magnetic susceptibility measurements show a dip anomaly in the magnetization curves which persists over a range of approximately 305 K- 315 K. SANS measurements reveal a rotationally disordered polydomain skymrion lattice. Applying a recently developed symmetry-breaking magnetic field sequence, we were able to orient and order the previously jammed state to yield the prototypical hexagonal diffraction patterns, with secondary diffraction rings.
description: 7 pages, 8 figures
Laterally defined freely suspended quantum dots in GaAs/AlGaAs heterostructures
Creators: name: Rossler, C
name: Bichler, M
name: Schuh, D
name: Wegscheider, W
name: Ludwig, S
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Free standing beams containing a two-dimensional electron system are shaped from a GaAs/AlGaAs heterostructure. Quantum point contacts and (double) quantum dots are laterally defined using metal top gates. We investigate the electronic properties of these nanostructures by transport spectroscopy. Tunable localized electron states in freely suspended nanostructures are a promising tool to investigate the electron-phonon-interaction.
title: The Iron Age pottery from Alalakh/Tell Atchana: a morphological and functional analysis
Creators: name: Montesanto, M
Publisher: name: University of Liverpool Repository
Year: 2023

description: The site of Tell Atchana/Ancient Alalakh is located in the Amuq valley, now in the modern province of Hatay, in Southern Turkey. While it was previously thought that the site was abandoned towards the end of the Late Bronze Age, recent excavations at the site have demonstrated the presence of Iron Age levels, suggesting a prolonged period of occupation. This thesis presents a detailed analysis of the pottery assemblages excavated from the Iron Age levels of Alalakh; makes a major contribution to defining a new chronology for the site of Alalakh and sheds a new light on the last centuries of occupation. Based on the pottery assemblages this thesis proposes a new interpretation of the Early Iron Age period as being not a period of crisis and collapse but of accomplishment and regeneration. Moreover, by applying a more holistic and anthropological approach to the study of ceramics, this thesis investigates the patterns of consumption and of social dynamics in Early Iron Age Alalakh and links them within the broader regional framework of the Northern Levant. The morphological analysis carried out in this thesis defines a typology for the Iron Age pottery assemblages and establishes a relative chronology for the Iron Age levels. This enables the Iron Age settlement on Alalakh to be dated to the Iron Age I and II (12th-9th century BC). The functional analysis performed on the pottery assemblage recovered from square 42.10, the only square that yielded a reliable stratigraphy, results in the identification of the square as an open area devoted to the processing and consumption of food. This approach determines a change in the way food was cooked and displayed, but not in the way it was served and consumed. Finally this thesis draws conclusions related to continuity and change detectable in the local pottery assemblage and proposes a new historical narrative regarding Alalakh and the Amuq valley for the first centuries of the Early Iron Age.
Quantum Algebras Associated With Bell States
Creators: name: Zhang, Yong
name: Jing, Naihuan
name: Ge, Mo-Lin
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The antisymmetric solution of the braided Yang--Baxter equation called the Bell matrix becomes interesting in quantum information theory because it can generate all Bell states from product states. In this paper, we study the quantum algebra through the FRT construction of the Bell matrix. In its four dimensional representations via the coproduct of its two dimensional representations, we find algebraic structures including a composition series and a direct sum of its two dimensional representations to characterize this quantum algebra. We also present the quantum algebra using the FRT construction of Yang--Baxterization of the Bell matrix.
description: v1: 15 pages, 2 figures, latex; v2: 18 pages, 2 figures, latex, references and notes added
title: Value of Research
title: SPR Projects from 1995 to 1999
titleType: Subtitle
Creators: name: Hartman, Donald L.
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 2001
Subjects: subject: Transportation Engineering

description: This report provides summary documentation of the 45 “SPR” research projects funded at the Kentucky Transportation Center (University of Kentucky) from 1995 through 1999. Eleven of these projects were selected for highlighting with up-to-date information regarding results and benefits. They represent a diverse range of research and demonstrate considerable breadth in the implementation of results. Abstracts for all the projects are include in the appendix. A brief discussion of the need/purpose of research, the research process, and the program areas of research at the Kentucky Transportation Center is included.
Local structure in Ag$_3$[Co(CN)$_6$]: Colossal thermal expansion, rigid unit modes and argentophilic interactions
Creators: name: Conterio, Michael J.
name: Goodwin, Andrew L.
name: Tucker, Matthew G.
name: Keen, David A.
name: Dove, Martin T.
name: Peters, Lars
name: Evans, John S. O.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Local structure in the colossal thermal expansion material Ag$_3$[Co(CN)$_6$] is studied here using a combination of neutron total scattering and reverse Monte Carlo (RMC) analysis. We show that the large thermal variations in cell dimensions occur with minimal distortion of the [Co(CN)$_6$] coordination polyhedra, but involve significant flexing of the Co--CN--Ag--NC--Co linkages. We find real-space evidence in our RMC configurations for the importance of low-energy rigid unit modes (RUMs), particularly at temperatures below 150 K. Using a reciprocal-space analysis we present the phonon density of states at 300 K and show that the lowest-frequency region is dominated by RUMs and related modes. We also show that thermal variation in the energies of Ag$...$Ag interactions is evident in both the Ag partial pair distribution function and in the Ag partial phonon density of states. These findings are discussed in relation to the thermodynamic properties of the material.
description: 24 pages; submitted to JP:CM
Chromospheric Activity in 55 Cancri: I. Results from Theoretical Wave Studies
Creators: name: Fawzy, Diaa E.
name: Cuntz, Manfred
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present theoretical models of chromospheric heating for 55 Cancri, an orange dwarf of relatively low activity. Self-consistent, nonlinear and time-dependent ab-initio numerical computations are pursued encompassing the generation, propagation, and dissipation of waves. We consider longitudinal waves operating among arrays of flux tubes as well as acoustic waves pertaining to nonmagnetic stellar regions. Additionally, flux enhancements for the longitudinal waves are also taken into account as supplied by transverse tube waves. The Ca II K fluxes are computed (multi-ray treatment) assuming partial redistribution as well as time-dependent ionization. The self-consistent treatment of time-dependent ionization (especially for hydrogen) greatly impacts the atmospheric temperatures and electron densities (especially behind the shocks); it also affects the emergent Ca II fluxes. Particularly, we focus on the influence of magnetic heating on the stellar atmospheric structure and the emergent Ca II emission, as well as the impact of nonlinearities. Our study shows that a higher photospheric magnetic filling factor entails a larger Ca II emission; however, an increased initial wave energy flux (e.g., associated with mode coupling) is of little difference. Comparisons of our theoretical results with observations will be conveyed in forthcoming Paper II.
description: 12 pages, 10 figures, 4 tables; accepted by MNRAS
Letter from James Goldie to "Sirs" [John Edgar McAllister and Ronald Stanhope Dormer], November 28, 1931
Creators: name: Goldie, James
Publisher: name: The University of British Columbia
Year: 2017

description: Letter to "Sirs" [J.E. McAllister and R.S. Dormer] from James Goldie, dated November 28, 1931, regarding the yield, crop conditions, finances, the water shortage, and the Associated Independents.
Quality Based Prequalification of Contractors
Creators: name: Hancher, Donn E.
name: Lambert, Sean E.
name: Maloney, William F.
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 2001
Subjects: subject: Transportation Engineering

description: This report summarizes the efforts to provide the Kentucky Transportation Cabinet with a system for evaluating the quality of the performance of contractors on highway construction projects and using that evaluation in the Cabinet’s annual prequalification process for contractors. Contacts with several other state departments of transportation were made to identify best practices and concerns. An advisory committee of experienced KyTC engineers plus Kentucky contractor representatives met extensively to develop the final performance evaluation documents to be used in the process.  A performance evaluation process was developed to evaluate a contractor’s work on projects and the results from all of the contractor’s projects used in the annual prequalification process. A performance evaluation process was also developed to allow contractors to evaluate the performance of the Cabinet’s Department of Highways (DOH) on projects.  These new evaluation processes will begin implementation in December, 2001. Once implemented, the new process will enable the Cabinet to evaluate the performance of contractors on its projects and to recognize performance more accurately in the prequalification process. It will also be able to use the input from contractors on the DOH’s performance for quality improvement of its own processes and practices.
Simulation of up- and down-going neutrino induced showers at the site of the Pierre Auger Observatory
Creators: name: Gora, Dariusz
name: Roth, Markus
name: Tamburro, Alessio
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a study about the possibility to detect neutrino induced extensive air showers at the Pierre Auger Observatory. The Monte Carlo simulations performed take into account the details of the neutrino propagation inside the Earth, the air as well as the surrounding mountains which are modelled by a digital elevation map. Details on the sensitivity with respect to the incoming direction as well as the aperture and the total observable event rates are calculated on the basis of various assumptions of the incoming neutrino flux.
description: Based on a talk presented at European Cosmic Ray Symposium, Lisbon, September 2006
N=4 mechanics, WDVV equations and roots
Creators: name: Galajinsky, Anton
name: Lechtenfeld, Olaf
name: Polovnikov, Kirill
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: N=4 superconformal multi-particle quantum mechanics on the real line is governed by two prepotentials, U and F, which obey a system of partial differential equations linear in U and generalizing the Witten-Dijkgraaf-Verlinde-Verlinde (WDVV) equation for F. Putting U=0 yields a class of models (with zero central charge) which are encoded by the finite Coxeter root systems. We extend these WDVV solutions F in two ways: the A_n system is deformed n-parametrically to the edge set of a general orthocentric n-simplex, and the BCF-type systems form one-parameter families. A classification strategy is proposed. A nonzero central charge requires turning on U in a given F background, which we show is outside of reach of the standard root-system ansatz for indecomposable systems of more than three particles. In the three-body case, however, this ansatz can be generalized to establish a series of nontrivial models based on the dihedral groups I_2(p), which are permutation symmetric if 3 divides p. We explicitly present their full prepotentials.
description: 1+25 pages; v2: major revision (more general analysis, new solutions, additional references); v3: improvements in sects.5,8,9, refs. added
Minutes of meeting of the Trustees of the Winfield & Okanagan Centre Irrigation District, November 26, 1931 and November 30, 1931
Creators: name: Trustees Of The Winfield And Okanagan Centre Irrigation District
Publisher: name: The University of British Columbia
Year: 2017

description: Minutes of meeting of the Trustees of the Winfield & Okanagan Centre Irrigation District, dated November 26, 1931, regarding difficulties with proceeding with construction work; minutes of meeting, dated November 30, 1931, regarding the estimated payable amount to the contractors, Crooked Lake dam, the proposed Duck Lake flume, and the assessment of Lot 55 Map 457.
Three-Dimensional Structure and Dust Extinction in the Small Magellanic Cloud
Creators: name: Merica-Jones, Petia Yanchulova
name: Sandstrom, Karin M.
name: Johnson, L. Clifton
name: Dolphin, Andrew E.
name: Dalcanton, Julianne J.
name: Gordon, Karl
name: Roman-Duval, Julia
name: Weisz, Daniel R.
name: Williams, Benjamin F.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We examine the three-dimensional structure and dust extinction properties in a ~ 200 pc $\times$ 100 pc region in the southwest bar of the Small Magellanic Cloud (SMC). We model a deep Hubble Space Telescope optical color-magnitude diagram (CMD) of red clump and red giant branch stars to infer the dust extinction and galactic structure. We model the distance distribution of the stellar component with a Gaussian and find a centroid distance of 65.2 kpc (distance modulus $μ$ = 19.07 mag) with a FWHM $\approx$ 11.3 kpc. This large extent along the line of sight reproduces results from previous studies using variable stars and red clump stars. Additionally, we find an offset between the stellar and dust distributions, with the dust on the near side relative to the stars by 3.22 $^{+1.69}_{-1.44}$ kpc, resulting in a 73% reddened fraction of stars. Modeling the dust layer with a log-normal $A_V$ distribution indicates a mean extinction $\langle A_V \rangle$ = 0.41 $\pm$ 0.09 mag. We also calculate $A_V/N_H$ = 3.2 - 4.2 $\times10^{-23}$ mag cm$^2$ H$^{-1}$ which is significantly lower than the Milky Way value but is comparable to previous SMC dust-to-gas ratio measurements. Our results yield the first joint dust extinction and 3D geometry properties in a key region in the SMC. This study demonstrates that CMD modeling can be a powerful tool to simultaneously constrain dust extinction and geometry properties in nearby galaxies.
description: 16 pages, 10 figures. Accepted for publication in ApJ
Dissipative light field as a way to create strongly localized structures for atom lithography
Creators: name: Prudnikov, O. N.
name: Taichenachev, A. V.
name: Tumaikin, A. M.
name: Yudin, V. I.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Generally, the conditions for deep sub-Doppler laser cooling do not match the conditions for the strong atomic localization that takes a place in deeper optical potential and, in consequence, leads to larger temperature. Moreover, for a given detuning in a deep optical potential the secular approximation which is usually used for quantum description of laser cooling becomes no more valid. Here we perform an analysis of atomic localization in optical potential based on a full quantum approach for atomic density matrix. We also show that the laser cooling in a deep far-off detuned optical potential, created by a light field with a polarization gradient, can be used as an alternative method for forming high contrast spatially localized structures of atoms for the purposes of atom lithography and atomic nanofabrication. Finally, we perform an analysis of the possible limits for the width and the contrast of localized atomic structures that can in principle be reached by this type of the light mask.
description: 4 figures
Ab initio study of oxygen segregation in silicon grain boundaries: the role of strain and vacancies
Creators: name: Maji, Rita
name: Luppi, Eleonora
name: Capron, Nathalie
name: Degoli, Elena
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Multi-crystalline silicon is widely used for producing low-cost and high-efficiency solar cells. During crystal growth and device fabrication, silicon solar cells contain grain boundaries (GBs) which are preferential segregation sites for atomic impurities such as oxygen atoms. GBs can induce charge carriers recombination significantly reducing carrier lifetimes and therefore they can be detrimental for Si device performance. We studied the correlation between structural, energetic and electronic properties of Σ3{111} Si GB in the presence of vacancies, strain and multiple O segregation. The study of the structural and energetic properties of GBs in the presence of strain and vacancies gives an accurate description of the complex mechanisms that control the segregation of oxygen atoms. We analysed tensile and compressive strain and we obtained that local tensile strain around O impurities is very effective for segregation. We also studied the role of multiple O impurities in the presence of Si vacancies finding that the segregation is favorite for those structures which have restored tetrahedral covalent bonds. The presence of vacancies attract atomic impurities in order to restore the electronic stability: the interstitial impurity becomes substitutional. This analysis was the starting point to correlate the change of the electronic properties in Σ3{111}Si GBs with O impurities in the presence of strain and vacancies. For each structure we analysed the density of states and its projection on atoms and states, the band gaps, the segregation energy and their correlation in order to characterise the nature of new energy levels. Actually, knowing the origin of defined electronic states would allow the optimization of materials in order to reduce non-radiative electron-hole recombination avoiding charge and energy losses and therefore improving solar cell efficiency.
description: 21 pages, 13 figures (just accepted)
Resilient Modulus of Kentucky Soils
Creators: name: Hopkins, Tommy C.
name: Beckham, Tony L.
name: Sun, Charlie
name: Ni, Bixian
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 2001
Subjects: subject: Transportation Engineering

description: In recent years, the American Association of State Highway Transportation Officials (AASHTO) has recommended the use of resilient modulus for characterizing highway materials for pavement design. This recommendation evolved as of a result of a trend in pavement design of using mechanistic models, which are based on the theory of elasticity (layered elastic analysis) or linear and non-linear, finite elements (and finite difference methods), or a combination of both of those theoretical approaches. Although much progress has been made in recent years in developing mathematical, mechanistic pavement design models, results obtained from those models are only as good as the material parameters used in the models. Resilient modulus of the subgrade soil is an important parameter in the mechanistic models and in the 1993 AASHTO pavement design equation. The main goal of this study was to establish a simple and efficient means of predicting the resilient modulus of any given type of Kentucky soil. To accomplish this purpose, 128 tests were performed on several different soil types from various locations of Kentucky. Specimens were remolded to simulate compaction conditions encountered in the field. Tests were performed on soaked and unsoaked specimens so that an assessment could be made of the affect of moisture on resilient modulus values. Vast differences were found between soaked and unsoaked values of resilient modulus.  Based on an analysis of the data, a new mathematical model is proposed which relates resilient modulus to any given selected, or calculated, principal stresses in the subgrade. This model improves the means of obtaining best data “fits” between resilient modulus and stresses. Furthermore, if the AASHTO classification and group index are known, than the resilient modulus of the soil can be predicted from the new model for any known stress condition in the subgrade. Multiple regression analysis was used to obtain relationships between resilient modulus and confining stress and deviator stress. No difficulties were encountered in testing “as-compacted” (unsoaked) samples. Values of R2 of 91 percent of unsoaked test specimens were greater than, or equal to, 0.87. However, values of R2 of only 35 percent of tested, soaked samples exceeded 0.87. Difficulties were encountered in testing soaked specimens. More research is needed to test saturated, or nearly saturated, soil specimens—conditions that often exist in the field.  To make the resilient modulus data and the new model readily available to design personnel of the Kentucky Transportation Cabinet, a “windows” computer software application was developed in a client/server environment. This program is embedded in the Kentucky Geotechnical Database, which resides on a Cabinet server in Frankfort, Kentucky. The resilient predictor model and data are readily available to pavement design personnel statewide.
INT monitoring survey of Local Group dwarf galaxies: star formation history and chemical enrichment
Creators: name: Parto, Tahere
name: Dehghani, Shahrzad
name: Javadi, Atefeh
name: Saremi, Elham
name: van Loon, Jacco Th.
name: Khosroshahi, Habib
name: Mirtorabi, Mohammad Taghi
name: Abdollahi, Hedieh
name: Gholami, Mahtab
name: Hashemi, Seyed Azim
name: Navabi, Mahdieh
name: Noori, Majedeh
name: Aghdam, Sima Taefi
name: Torki, Maryam
name: Vafaeizade, Mahshid
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The Local Group (LG) hosts many dwarf galaxies with diverse physical characteristics in terms of morphology, mass, star formation, and metallicity. To this end, LG can offer a unique site to tackle questions about the formation and evolution of galaxies by providing detailed information. While large telescopes are often the first choices for such studies, small telescope surveys that perform dedicated observations are still important, particularly in studying bright objects in the nearby universe. In this regard, we conducted a nine epoch survey of 55 dwarf galaxies called the Local Group dwarf galaxies survey using the 2.5m Isaac Newton Telescope (INT) in La Palma to identify Long-Period Variable (LPV) stars, namely Asymptotic Giant Branch (AGB) and Red Super Giant (RSG) stars. AGB stars formed at different times and studying their radial distribution and mass-loss rate can shed light on the structure formation in galaxies. To further investigate the evolutionary path of these galaxies, we construct their star formation history (SFH) using the LPV stars, which are at the final stages of their evolution and therefore experience brightness fluctuations on the timescales between hundred to thousand days. In this paper, we present some of the results of the Local Group dwarf galaxies survey.
description: International Conference Astronomical Surveys and Big Data 2 (ASBD-2), Proceeding paper, Volume 67, pp.232-235
The holographic dark energy in non-flat Brans-Dicke cosmology
Creators: name: Setare, M R
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper we study cosmological application of holographic dark energy density in the Brans-Dicke framework. We employ the holographic model of dark energy to obtain the equation of state for the holographic energy density in non-flat (closed) universe enclosed by the event horizon measured from the sphere of horizon named $L$. Our calculation show, taking $Ω_Λ=0.73$ for the present time, the lower bound of $w_{\rm Λ}$ is -0.9. Therefore it is impossible to have $w_{\rm Λ}$ crossing -1. This implies that one can not generate phantom-like equation of state from a holographic dark energy model in non-flat universe in the Brans-Dicke cosmology framework. In the other hand, we suggest a correspondence between the holographic dark energy scenario in flat universe and the phantom dark energy model in framework of Brans-Dicke theory with potential.
description: 10 pages, no figures, abstract and text extended, references added
CFBDS J005910.90-011401.3: reaching the T-Y Brown Dwarf transition?
Creators: name: Delorme, Philippe
name: Delfosse, Xavier
name: Albert, Loic
name: Artigau, Etienne.
name: Forveille, Thierry
name: Reylé, Céline
name: Allard, France
name: Homeier, Derek
name: Robin, Annie
name: Willott, Chris J.
name: Liu, Michael
name: Dupuy, Trent
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report the discovery of CFBDS J005910.90-011401.3 (hereafter CFBDS0059), the coolest brown dwarf identified to date. We found CFBDS0059 using i' and z' images from the Canada-France-Hawaii Telescope (CFHT), and present optical and near-infrared photometry, Keck laser guide star adaptive optics imaging, and a complete near-infrared spectrum, from 1.0 to 2.2 $μ$m. A side to side comparison of the near-infrared spectra of CFBDS0059 and ULAS J003402.77-005206.7 (hereafter ULAS0034), previously the coolest known brown dwarf, indicates that CFBDS0059 is ~50+/-15K cooler. We estimate a temperature of Teff ~ 620K and gravity of log g ~ 4.75. Evolutionary models translate these parameters into an age of 1-5 Gyr and a mass of 15-30 M_Jup. We estimate a photometric distance of ~13pc, which puts CFBDS0059 within easy reach of accurate parallax measurements. Its large proper motion suggests membership in the older population of the thin disk. The spectra of both CFBDS0059 and ULAS J0034 shows probable absorption by a wide ammonia band on the blue side of the $H$-band flux peak. If, as we expect, that feature deepens further for still lower effective temperatures, its appearance will become a natural breakpoint for the transition between the T spectral class and the new Y spectral type. CFBDS0059 and ULAS J0034 would then be the first Y0 dwarfs.
description: 12 pages, Submitted to A&A
Kilonovae across the nuclear physics landscape: The impact of nuclear physics uncertainties on r-process-powered emission
Creators: name: Barnes, Jennifer
name: Zhu, Y. L.
name: Lund, K. A.
name: Sprouse, T. M.
name: Vassh, N.
name: McLaughlin, G. C.
name: Mumpower, M. R.
name: Surman, R.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Merging neutron stars produce "kilonovae"---electromagnetic transients powered by the decay of unstable nuclei synthesized via rapid neutron capture (the r-process) in material that is gravitationally unbound during inspiral and coalescence. Kilonova emission, if accurately interpreted, can be used to characterize the masses and compositions of merger-driven outflows, helping to resolve a long-standing debate about the origins of r-process material in the Universe. We explore how the uncertain properties of nuclei involved in the r-process complicate the inference of outflow properties from kilonova observations. Using r-process simulations, we show how nuclear physics uncertainties impact predictions of radioactive heating and element synthesis. For a set of models that span a large range in both predicted heating and final abundances, we carry out detailed numerical calculations of decay product thermalization and radiation transport in a kilonova ejecta with a fixed mass and density profile. The light curves associated with our models exhibit great diversity in their luminosities, with peak brightness varying by more than an order of magnitude. We also find variability in the shape of the kilonova light curves and their color, which in some cases runs counter to the expectation that increasing levels of lanthanide and/or actinide enrichment will be correlated with longer, dimmer, redder emission.
description: Submitted to ApJ; comments welcome
Midsized Farms in 1987
Creators: name: Brooks, Nora L.
name: Brooks, Nora L.
Publisher: name: Unknown
Year: 1992
Subjects: Crop Production/Industries
Farm Management
Financial Economics
Livestock Production/Industries

description: Much has been written about both very large and very small farms, but little has appeared about small- and moderate-sized commercial farms. The number and proportion of these farms have declined over time, but they are not disappearing. These midsized farms are still an important part of American agriculture.
Non-perturbative Approach to Critical Dynamics
Creators: name: Canet, Léonie
name: Chaté, Hugues
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: This paper is devoted to a non-perturbative renormalization group (NPRG) analysis of Model A, which stands as a paradigm for the study of critical dynamics. The NPRG formalism has appeared as a valuable theoretical tool to investigate non-equilibrium critical phenomena, yet the simplest -- and nontrivial -- models for critical dynamics have never been studied using NPRG techniques. In this paper we focus on Model A taking this opportunity to provide a pedagological introduction to NPRG methods for dynamical problems in statistical physics. The dynamical exponent $z$ is computed in $d=3$ and $d=2$ and is found in close agreement with results from other methods.
description: 13 pages
Kentucky Highway User Survey 2000
Creators: name: Langley, Ronald E.
Publisher: name: Kentucky Transportation Center, University of Kentucky
Year: 2001
Subjects: subject: Transportation Engineering

description: The purpose of this study was to continue the efforts begun in 1997 to monitor Kentucky public opinion regarding the quality of the highway system and also includes a portion to measure satisfaction with the current drivers’ license and registration renewal processes. Kentucky’s 2000 public opinion is compared to data collected since 1997 to gauge Kentucky’s progress over the past years, and is compared to the NQI 2000 Survey done on the national level to show how Kentuckians’ opinions compare to those nationwide.