cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The problem of time for non-deparametrizable models and quantum gravity
Creators: name: Frauca, Álvaro Mozota
Publisher: name: arXiv
Year: 2024
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: History and Philosophy of Physics (physics.hist-ph)
subject: FOS: Physical sciences

description: In this article I introduce a distinction between two types of reparametrization invariant models and I argue that while both suffer from a problem of time at the time of applying canonical quantization methods to quantize them, its severity depends greatly on the type of model. Deparametrizable models are models that have time as a configuration or phase space variable and this makes it the case that the problem of time can be solved. In the case of non-deparametrizable models, we cannot find time in the configuration or phase space of the model, and hence the techniques that allow solving the problem in the deparametrizable case do not apply. This seems to signal that the canonical quantization techniques fail to give a satisfactory quantization of non-deparametrizable models. As I argue that general relativity is non-deparametrizable, this implies that the canonical quantization of this theory may fail to provide a successful theory of quantum gravity.
A dynamical gluon mass solution in a coupled system of the Schwinger-Dyson equations
Creators: name: Aguilar, A. C.
name: Natale, A. A.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study numerically the Schwinger-Dyson equations for the coupled system of gluon and ghost propagators in the Landau gauge and in the case of pure gauge QCD. We show that a dynamical mass for the gluon propagator arises as a solution while the ghost propagator develops an enhanced behavior in the infrared regime of QCD. Simple analytical expressions are proposed for the propagators, and the mass dependency on the $Λ_{QCD}$ scale and its perturbative scaling are studied. We discuss the implications of our results for the infrared behavior of the coupling constant, which, according to fits for the propagators infrared behavior, seems to indicate that $α_s (q^2) \to 0$ as $q^2 \to 0$.
description: 17 pages, 7 figures - Revised version to be consistent with erratum to appear in JHEP
Six years of BeppoSAX observations of blazars: a spectral catalog
Creators: name: Donato, D.
name: Sambruna, R. M.
name: Gliozzi, M.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a spectral catalog for blazars based on the BeppoSAX archive. The sample includes 44 High-energy peaked BL Lacs (HBLs), 14 Low-energy peaked BL Lacs (LBLs), and 28 Flat Spectrum Radio Quasars (FSRQs). A total of 168 LECS, MECS, and PDS spectra were analyzed, corresponding to observations taken in the period 1996--2002. The 0.1--50 keV continuum of LBLs and FSRQs is generally fitted by a single power law with Galactic column density. A minority of the observations of LBLs (25%) and FSRQs (15%) is best fitted by more complex models like the broken power law or the continuously curved parabola. These latter models provide also the best description for half of the HBL spectra. Complex models are more frequently required for sources with fluxes F_{2-10 keV} > 10^-11 cm-2 s-1, corresponding to spectra with higher signal-to-noise ratio. As a result, considering sources with flux above this threshold, the percentage of spectra requiring those models increases for all the classes. We note that there is a net separation of X-ray spectral properties between HBLs on one side, and LBLs and FSRQs on the other, the distinction between LBLs and FSRQs is more blurry. This is most likely related to ambiguities in the optical classification of the two classes.
description: 6 pages, 4 figures, 7 tables. Accepted for publication in A&A
Food quality and safety situation in Turkey: governance and barriers to success
Creators: name: Koc, A. Ali
name: Asci, Serhat
name: Alpas, Hami
name: Giray, Handan
name: Gay, Stephan Hubertus
name: Koc, A. Ali
name: Asci, Serhat
name: Alpas, Hami
name: Giray, Handan
name: Gay, Stephan Hubertus
Publisher: name: Unknown
Year: 2009
Subjects: subject: Agricultural and Food Policy
subject: Food Consumption/Nutrition/Food Safety
subject: Food Quality Governance
subject: SMEs Barrier for Food Quality
subject: Food Quality Assurance

description: The institutional environment for food quality and safety in Turkey is rapidly changing in the last decade but there are still some inconsistencies compared with the EU. High costs of establishing quality assurance systems (QAS), inefficient capacity of the institutional frame, unknown consumer attitudes, low level of production techniques and lack of awareness of producers and consumers are important weaknesses, when evaluating the current food quality and safety situation in Turkey. Whereas, rapid development of QAS, increase in consumer demands, harmonisation of legislation with the EU, increase in the research and incentives for quality production, and production potentials were determined as strong points. When analysing the socio-economic situation of farms, producers’ knowledge, perception and interest in quality with Rapid Rural Appraisal (RRA), it is found that producers did not accumulate capital because of the low profits, a handicap for expanding and investing into production and product quality. Moreover, the producers' knowledge is limited and their quality perception mainly focuses on food safety. As a result, academic studies and research projects needs to be extended and the adaptation of the Turkish legislation with the EU should be completed accordingly.
Additional file 18 of Removal of H2Aub1 by ubiquitin-specific proteases 12 and 13 is required for stable Polycomb-mediated gene repression in Arabidopsis
Creators: name: Lejon E. M. Kralemann
name: Shujing Liu
name: Trejo-Arellano, Minerva S.
name: Muñoz-Viana, Rafael
name: Köhler, Claudia
name: Hennig, Lars
Publisher: name: figshare
Year: 2020
Subjects: subject: Biophysics
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Neuroscience
subject: Immunology
subject: FOS: Clinical medicine
subject: Developmental Biology
subject: Cancer
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: Plant Biology
subject: Computational Biology

description: Additional file 18. Review history.
Sequencing of p53 genes from Mytilus edulis and Mytilus trossulus for use in environmental effects monitoring of primary treated effluent
Creators: name: Muttray, Annette Friederike
Publisher: name: University of British Columbia
Year: 2009

description: This thesis describes the sequencing and potential use of a genetic biomarker for coastal environmental effects monitoring of municipal effluents. The Blue Mussel {Mytilus edulis) and the Bay Mussel (Mytilus trossulus) are currently investigated for their use in municipal effluent effects monitoring. Both can develop a disease of the haemolymph, called haemic neoplasia or leukemia, albeit at different prevalences. The p53 gene is a tumor suppressor gene that is fundamental in cell cycle control and apoptosis. It is mutated or differentially expressed in about 50% of all human cancers and has been implicated in leukemia development in clams. Thus, the p53 gene family was chosen as potential biomarkers for haemic neoplasia in Mytilus spp. During this study, the p53 mRNA sequences of both Mytilus species were elucidated and analyzed in detail using several databases. Sequences show 99.8% similarity on the protein level, but are only 96.5% similar at the DNA level, and differ especially in their 3 untranslated regions, which are important in the regulation of post-transcriptional events. Future studies are required to show potential linkages of p53 gene family expression patterns with haemic neoplasia in the mussels. During this study, an additional gene sequence was discovered and is submitted as a Mytilin C antimicrobial peptide precursor in M. trossulus. These peptides occur in the haemolymph and haemocytes of mussels and prevent microbial infections of the open circulatory system. This thesis also reviews the current state of knowledge on the use of molecular biomarkers for monitoring effects of endocrine disrupting compounds and surfactants and reviews iri-depth the fate and effects of one group of surfactants, linear alkylbenzene sulfonates (LAS). LAS were identified as a major cause of toxicity in the effluent of one treatment plant in the Greater Vancouver Regional District, and have been shown to enhance the effects of endocrine disrupting compounds. Based on our current knowledge about increased prevalence of haemic neoplasia in other bivalves in polluted areas, clam p53 gene family expression patterns, as well as environmental carcinogenesis involving the endocrine and p53 systems in humans, it is suggested that the p53 gene family is a good candidate for development of a molecular biomarker.
D-Brane Boundary States in the Pure Spinor Superstring
Creators: name: Schiappa, Ricardo
name: Wyllard, Niclas
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the construction of D-brane boundary states in the pure spinor formalism for the quantisation of the superstring. This is achieved both via a direct analysis of the definition of D-brane boundary states in the pure spinor conformal field theory, as well as via comparison between standard RNS and pure spinor descriptions of the superstring. Regarding the map between RNS and pure spinor formulations of the superstring, we shed new light on the tree level zero mode saturation rule. Within the pure spinor formalism we propose an explicit expression for the D-brane boundary state in a flat spacetime background. While the non-zero mode sector mostly follows from a simple understanding of the pure spinor conformal field theory, the zero mode sector requires a deeper analysis which is one of the main points in this work. With the construction of the boundary states at hand, we give a prescription for calculating scattering amplitudes in the presence of a D-brane. Finally, we also briefly discuss the coupling to the world-volume gauge field and show that the D-brane low-energy effective action is correctly reproduced.
description: 42 pages
Arithmetic of decay walls through continued fractions: a new exact dyon counting solution in $\mathcal{N} =4$ CHL models
Creators: name: Cardoso, Gabriel Lopes
name: Nampuri, Suresh
name: Rosselló, Martí
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We use continued fractions to perform a systematic and explicit characterization of the decays of two-centred dyonic black holes in $4D$ $\mathcal{N} =4$ heterotic $\mathbb{Z}_N$ CHL models. Thereby we give a new exact solution for the problem of counting decadent dyons in these models.
description: 32 pages, 4 figures
Spin-Polarized Transport in Ferromagnet-Marginal Fermi Liquid Systems
Creators: name: Mu, Hai-Feng
name: Su, Gang
name: Zheng, Qing-Rong
name: Jin, Biao
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Spin-polarized transport through a marginal Fermi liquid (MFL) which is connected to two noncollinear ferromagnets via tunnel junctions is discussed in terms of the nonequilibrium Green function approach. It is found that the current-voltage characteristics deviate obviously from the ohmic behavior, and the tunnel current increases slightly with temperature, in contrast to those of the system with a Fermi liquid. The tunnel magnetoresistance (TMR) is observed to decay exponentially with increasing the bias voltage, and to decrease slowly with increasing temperature. With increasing the coupling constant of the MFL, the current is shown to increase linearly, while the TMR is found to decay slowly. The spin-valve effect is observed.
description: 5 pages, 6 figures, Phys. Rev. B 71, 064412 (2005)
Additional file 1 of Removal of H2Aub1 by ubiquitin-specific proteases 12 and 13 is required for stable Polycomb-mediated gene repression in Arabidopsis
Creators: name: Lejon E. M. Kralemann
name: Shujing Liu
name: Trejo-Arellano, Minerva S.
name: Muñoz-Viana, Rafael
name: Köhler, Claudia
name: Hennig, Lars
Publisher: name: figshare
Year: 2020
Subjects: subject: Biophysics
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Neuroscience
subject: Immunology
subject: FOS: Clinical medicine
subject: Developmental Biology
subject: Cancer
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: Plant Biology
subject: Computational Biology

description: Additional file 1:Figure S1. RNA-seq PCA highlights redundancy between UBP12 and UBP13.Figure S2. H2Aub1 western blot. Figure S3. UBP12/13 targets are enriched for upregulated genes. Figure S4. Differential expression in a PRC1 mutant. Figure S5. Gene deregulation in a PRC2 mutant. Figure S6. UBP12/13 preferentially target PRC1-dependent genes. Figure S7. H3K27me3 western blot. Figure S8. H2Aub1-only genes are over-enriched for genes hypermethylated in ref6. Figure S9. H2Aub1-only genes are over-enriched for REF6 targets. Figure S10. Motif clusters are not sufficient for REF6 binding. Figure S11. H2Aub1-only genes are over-enriched for REF6 targets. Figure S12. CTCTGYTY motif and H2Aub1 presence are positively associated with REF6. Figure S13. H2Aub1 is associated with gene responsiveness. Figure S14. UBP12/13 targets are enriched for H2A.Z and putative H2A.Zub1. Figure S15. H2A.Z presence does not affect expression change in UBP12/13 targets. Figure S16. Comparison of replicates for ChIP-seq. Figure S17. Genome browser image.
Concentration in food retailing and anti-competitive practices in Turkey
Creators: name: Koc, A. Ali
name: Boluk, Gulden
name: Kovaci, Sureyya
name: Koc, A. Ali
name: Boluk, Gulden
name: Kovaci, Sureyya
Publisher: name: Unknown
Year: 2009
Subjects: subject: Agricultural and Food Policy
subject: Food Consumption/Nutrition/Food Safety
subject: Food retailing
subject: restructuring in food retailing
subject: buyer power and competition in food retailing.

description: As seen in many developing countries, concentration and globalization have substantially increased in food retailing in Turkey. Foreign direct investment, incentives to reduce informal economy through modern retailing, income, education, economic crises and urbanization are the main drivers for structural change of retail supply chain. Market shares of global retailers have increased in general and also food sub-sectors. The restructuring and concentration in food retailing have changed the marketing system and conditions facing firms. Concentration is also expected to increase in the future. With increasing concentration, anti-competitive practices has appeared in the food supply chain in Turkey: listing fees, shelf fees, advertising and announcing fee, discount pressure, unconditional product restoration and forces for own private label product package have been commonly used anti-competitive practices. Based on the interviews and literature survey and news gathered from newspapers, it is found that several anti-competitive practices are executed by supermarket in Turkey when these practices are compared with the anticompetitive practices determined by the United Kingdom Competition Commission (2000). It is observed that at the margin 16 of 52 practices are executed by supermarkets against the suppliers. Moreover, price flexing and sales below cost can be reflecting the monopoly power in consumer market segment.
UV Spectral-Slopes at $z=6-9$ in the Hubble Frontier Fields: Lack of Evidence for Unusual or Pop III Stellar Populations
Creators: name: Bhatawdekar, Rachana
name: Conselice, Christopher J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present new measurements of the UV spectral slope $β$ for galaxies at $z=6-9$ in the Frontier Fields cluster MACSJ0416.1-2403 and its parallel field, to an unprecedented level of low stellar mass. We fit synthetic stellar population models to the observed spectral energy distribution and calculate $β$ by fitting a power law to the best-fit spectrum. With this method, we report the derivation of rest-frame UV colours of galaxies for the Frontier Fields program extending out to $z=9$, probing magnitudes as faint as $M\mathrm{_{UV}=-13.5}$ at $z=6$. We find no significant correlation between $β$ and rest-frame UV magnitude $M_{1500}$ all redshifts, but we do find a strong correlation between $β$ and stellar mass with lower mass galaxies exhibiting bluer UV slopes. At $z=7$ the bluest median value of our sample is redder than previously reported values in the literature, whereas at $z=9$ our bluest data point has a median value of $β=-2.63_{-0.43}^{+0.52}$. Thus, we find no evidence for extreme stellar populations at $z>6$. We also observe a strong correlation between $β$ and SFR, such that galaxies with low SFRs exhibit bluer slopes. Additionally, there exists a star formation main sequence up to $z = 9$ with SFRs correlating with stellar mass. All of these relations show that $β$ values correlate with a process that drives both the overall SFR and stellar mass assembly. Furthermore, we observe no trend between $β$ and specific SFR, suggesting that $β$ is getting set by a global process driven by the scale of the galaxy.
description: 21 pages, 9 figures, Accepted for publication in ApJ
An engineering approach to the simulation of gross damage development in composite laminates
Creators: name: Floyd, Anthony Michael
Publisher: name: University of British Columbia
Year: 2009

description: It is challenging to predict the development of gross damage in polymer matrix composite (PMC) laminates accurately. Existing tools are not suitable for analyses of this sort; in general they predict initial failure but do not consider the post-failure behaviour, or they treat it in a relatively simple fashion. The accuracy of these tools often depends on the load case and material considered. A plane-stress continuum damage mechanics (CDM) constitutive model for gross damage development in PMC laminates has been developed previously by Williams et al. The model, CODAM, was implemented into a finite element analysis code and applied with considerable success to modelling crack growth in tension tests, and damage development in non-penetrating impact events. While sufficient for those specific applications, the model had several shortcomings including sensitivity to the size of elements, restrictions on the shape of stress-strain curve, an insufficient treatment of the characterization of the post-peak stress behaviour, and no consideration of the energy dissipated by individual elements. This work addresses these shortcomings. The most significant change is the inclusion of a technique that explicitly accounts for the energy dissipated by single elements. This change addresses strain localization, reducing the element-size dependency of the model, and improves on the physically based interpretation of the model parameters. By introducing the available fracture energy per unit area (GF) as a model parameter, characterizing the material in the post-peak stress regime (i.e., in gross damage states) becomes easier to understand and implement. Additionally, the description of the damage development has been generalized such that all the mathematical relationships are piece-wise linear, which allows for more flexibility and by allowing for concurrent, independent damage modes, increases the physical nature of the inputs. Other improvements including a generalization to three dimensions and the development of algorithms to treat penetrating impact events have been implemented but are not addressed in this thesis. The model has been exercised and validated in a number of applications. Damage development in unnotched, single edge notched, double edge notched, over-height compact tension, centre notched, and centre hole tension tests has been examined and compared to experiments. Additionally, the development of damage in two bending applications has been studied. The performance of the model in simulating structures of different sizes has been a focus of the work, and although the structural size effect in unnotched applications (which is mainly due to statistical effects) is not captured, the results show that CODAM is able to predict structural size effect in all notched tension applications.
Relational observables, reference frames, and conditional probabilities
Creators: name: Chataignier, Leonardo
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We discuss the construction of relational observables in time-reparametrization invariant quantum mechanics and we argue that their physical interpretation can be understood in terms of conditional probabilities, which are defined from the solutions of the quantum constraint equation in a generalization of the Page-Wootters formalism. In this regard, we show how conditional expectation values of worldline tensor fields are related to quantum averages of suitably defined relational observables. We also comment on how the dynamics of these observables can be related to a notion of quantum reference frames. After presenting the general formalism, we analyze a recollapsing cosmological model, for which we construct unitarily evolving quantum relational observables. We conclude with some remarks about the relevance of these results for the construction and interpretation of diffeomorphism-invariant operators in quantum gravity.
description: v2: references updated, minor typos corrected, conceptual clarifications added, published in Physical Review D
Cu-modified SrTiO3 perovskites toward enhanced water–gas shift catalysis: A combined experimental and computational study
Creators: name: Coletta, Vitor C.
name: Gonçalves, Renato V.
name: Bernardi, Maria I. B.
name: Hanaor, Dorian A. H.
name: Assadi, M. Hussein N.
name: Marcos, Francielle C. F.
name: Nogueira, Francisco G. E.
name: Assaf, Elisabete M.
name: Mastelaro, Valmor R.
Publisher: name: Technische Universität Berlin
Year: 2020
Subjects: subject: 540 Chemie und zugeordnete Wissenschaften
subject: water−gas shift
subject: SrTiO3
subject: DFT calculations
subject: perovskite catalysts
subject: operando XAS
subject: XRD
subject: Cu doping
subject: CuO formation

description: A water–gas shift reaction (WGS) is important and widely applied in the production of H2. Cu-modified perovskites are promising catalysts for WGS reactions in hydrogen generation. However, the structure-dependent stability and reaction pathways of such materials remain unclear. Herein, we report catalytically active Cu-modified SrTiO3 (nominally SrTi1–xCuxO3) prepared by a modified polymeric precursor method. Microstructural analysis revealed a partially segregated CuO phase in the as-prepared materials. Operando X-ray diffraction and absorption spectroscopy showed the reduction of CuO into a stable metallic phase under conditions of WGS reactions for all compositions. Among the characterized materials, the x = 0.20 composition showed the highest turnover frequency, lowest activation energy, and the highest WGS rate at 300 °C. According to density functional calculations, the formation of CuO is energetically less favorable compared with SrTiO3, explaining why the segregated CuO phase on the SrTiO3 surface is reduced to Cu during the catalytic reaction, while SrTiO3 remains. For x = 0.20, the size of the segregated CuO phase is optimum for facilitating the catalytic reaction. In contrast, a higher Cu content (x = 0.3) results in an aggregation of smaller CuO particles, resulting in fewer surface active sites and a net decrease in catalytic performance.
Systematic Study of Shell Effect near Drip-lines
Creators: name: Adhikari, S.
name: Samanta, C.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Variation of nuclear shell effects with nucleon numbers are evaluated using the modified Bethe-Weizsacker mass formula (BWM) and the measured atomic masses. The shell effects at magic neutron numbers N = 8, 20, 28, 50, 82 and 126 and magic proton numbers Z = 8, 20, 28,50 and 82 are found to vary rapidly approaching the drip lines. The shell effect due to one magic number increases when it approaches another magic number. Thus, shell effects are not always negligible near the drip lines.
description: 13 pages, 7 figures, International Journal of Modern Physics E(in press)
Afiche: Piensa pe chato
Creators: name: Cahui, Sergio Yhoel Soncco
name: Cervantes, Denis Alfredo Llamoca
name: Cisneros, Emilio Fernando Valdivia
Publisher: name: Zenodo
Year: 2021
Subjects: Game
Educational
Peru

description: Póster del juego "Piensa pe chato" Itch: https://katoinga.itch.io/piensa-pe-chato
description: Juego "Piensa pe Chato" Integrantes - Denis Alfredo Llamoca Cervantes - Sergio Yhoel Soncco Cahui - Emilio Fernando Valdivia Cisneros Descripción: Juega en el mapa del Perú y responde a las preguntas sobre cada departamento.
Radio Relics in Clusters of Galaxies
Creators: name: Giovannini, G.
name: Feretti, L.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In this paper we review the observational results on Relic radio sources in clusters of galaxies. We discuss their observational properties, structures and radio spectra. We will show that Relics can be divided according to their size, morphology, and location in the galaxy cluster. These differences could be related to physical properties of Relic sources. The comparison with cluster conditions suggests that Relics could be related to shock waves originated by cluster mergers.
description: 6 pages, 8 figures. Proceedings of the 3rd Korean Astrophysics Workshop "Cosmic Rays and Magnetic Fields in Large Scale Structure", Pusan, Korea, August 2004, eds. H. Kang & D. Ryu, Journal of the Korean Astronomical Society
Survey of Gravitationally lensed Objects in HSC Imaging (SuGOHI) -- VII. Discovery and Confirmation of Three Strongly Lensed Quasars
Creators: name: Jaelani, Anton T.
name: Rusu, Cristian E.
name: Kayo, Issha
name: More, Anupreeta
name: Sonnenfeld, Alessandro
name: Silverman, John D.
name: Schramm, Malte
name: Anguita, Timo
name: Inada, Naohisa
name: Kondo, Daichi
name: Schechter, Paul L.
name: Lee, Khee-Gan
name: Oguri, Masamune
name: Chan, James H. H.
name: Wong, Kenneth C.
name: Inoue, Kaiki T.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present spectroscopic confirmation of three new two-image gravitationally lensed quasars, compiled from existing strong lens and X-ray catalogs. Images of HSC J091843.27$-$022007.5 show a red galaxy with two blue point sources at either side, separated by 2.26 arcsec. This system has a source and a lens redshifts $z_s=0.804$ and $z_{\ell}=0.459$, respectively, as obtained by our follow-up spectroscopic data. CXCO J100201.50$+$020330.0 shows two point sources separated by 0.85 arcsec on either side of an early-type galaxy. The follow-up spectroscopic data confirm the fainter quasar has the same redshift with the brighter quasar from the SDSS fiber spectrum at $z_s=2.016$. The deflecting foreground galaxy is a typical early-type galaxy at a redshift of $z_{\ell}=0.439$. SDSS J135944.21$+$012809.8 has two point sources with quasar spectra at the same redshift $z_s=1.096$, separated by 1.05 arcsec, and fits to the HSC images confirm the presence of a galaxy between these. These discoveries demonstrate the power of the Hyper Suprime-Cam Subaru Strategic Program (HSC-SSP)'s deep imaging and wide sky coverage. Combined with existing X-ray source catalogues and follow-up spectroscopy, the HSC-SSP provides us unique opportunities to find multiple-image quasars lensed by a foreground galaxy.
description: Accepted for publication in MNRAS, 7 pages, 3 figures (add credit to Claude Cornen)
Comment on "Do Intradot Electron-Electron Interactions Induce Dephasing?"
Creators: name: König, Jürgen
name: Gefen, Yuval
name: Silva, Alessandro
Publisher: name: arXiv
Year: 2004
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: In a recent Letter, Jiang, Sun, Xie and Wang [Phys. Rev. Lett. 93, 076802 (2004), cond-mat/0408261] study transport through an interacting quantum dot embedded in one arm of an Aharonov-Bohm interferometer. Based on a theoretical analysis of the Aharonov-Bohm oscillation amplitude, Jiang {\it et al.} claim, contrary to earlier work by two of us, that at finite temperature the intradot interaction will {\em not} lead to any dephasing. Likewise, they claim that the theoretically predicted and experimentally verified asymmetry of the Aharonov-Bohm oscillation amplitude is {\em not} associated with dephasing. In this Comment, we point out severe inconsistencies in the analysis of the Letter by Jian {\it et al.}, and show that their conclusions are ill-founded.
description: 1 page, published version
Fixing All Moduli in a Simple F-Theory Compactification
Creators: name: Denef, Frederik
name: Douglas, Michael R.
name: Florea, Bogdan
name: Grassi, Antonella
name: Kachru, Shamit
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We discuss a simple example of an F-theory compactification on a Calabi-Yau fourfold where background fluxes, together with nonperturbative effects from Euclidean D3 instantons and gauge dynamics on D7 branes, allow us to fix all closed and open string moduli. We explicitly check that the known higher order corrections to the potential, which we neglect in our leading approximation, only shift the results by a small amount. In our exploration of the model, we encounter interesting new phenomena, including examples of transitions where D7 branes absorb O3 planes, while changing topology to preserve the net D3 charge.
description: 68 pages, 19 figures; v2: references added
IronSoul
Creators: name: Humire, Jose
name: Ali, Nur
name: Manuel, Raul
name: Samanez, Cesar
Publisher: name: Zenodo
Year: 2021

description: IronSoul game IronSoul es un juego que busca enseñar a los niños acerca de la historia de la época medieval de una forma dinámica y entretenida. Mediante los distintos escenarios en este juego de plataformas buscamos que el jugador se familiarice un poco con los elementos y entorno cultural de la época. Cesar Salvador Samanez Jimenez Raúl Eduardo Manuel Ortiz Nur Shamas Ali Santisteban Jose Guillermo Humire Huamani Descarga: https://jhose.itch.io/ironsoul
Financial Characteristics of North Dakota Farms 2007-2008
Creators: name: Swenson, Andrew L.
name: Swenson, Andrew L.
Publisher: name: Unknown
Year: 2009
Subjects: subject: Farm Management
subject: Financial Economics
subject: Farm financial management
subject: farm management
subject: farm income
subject: liquidity
subject: solvency
subject: profitability
subject: repayment capacity
subject: financial efficiency
subject: financial benchmarks
subject: tenure
subject: North Dakota.

description: The performance of over 500 North Dakota farms, 2007-2008, is summarized using 16 financial measures. Farms are categorized by geographic region, farm type, farm size, gross cash sales, farm tenure, net farm income, debt-to-asset, and age of farmer to analyze relationships between financial performance and farm characteristics. Five-year averages, 2003-2007, and farm financial trends for the 1999-2008 period are also presented. In 2008, median and average acreage per farm was 2,000 and 2,578, respectively. Median and average cash farm revenue was $464,464 and $607,623, respectively. Over 70% of farms were crop farms and 47 percent of farms had gross sales exceeding $500,000. Median age of farm operators was 47. Financial measures for 2008 and 2007 were much superior to those in other years for the 1999-2008 period. The highest median net farm income was $127,791 in 2007, followed by $114,520 in 2008. The lowest was $27,729 in 2001. The Red River Valley and crop farms typically had stronger profitability, solvency, and repayment capacity from 1999 to 2008 than other regions and farm types, respectively. Exceptions were 2007 when the central regions had the best regional performance and 2005 when the south central region and livestock farms had better performance. The 2008 and 2007 median net farm income for crop farms was $170,181 and $171,838, respectively, compared to only $14,343and $25,531for livestock farms. Farms with sales less than $250,000 were over twice as likely to have debt-to-asset higher than 70 percent than were farms with sales greater than $250,000. Farms that own some crop land, but less than 40 percent were more likely to be crop farms, farm more acreage, have larger sales, and be more profitable. As expected, solvency and percent of crop land owned increased with farmer age. In 1999, 2000, 2003, 2004, 2007 and 2008 the rate of return on equity exceeded the rate of return on assets, which indicates that debt capital was employed profitably. Interest expense as a percent of gross revenue declined in 2007 and 2008 because of sharp increases in gross revenue, after increasing in 2005 and 2006 because of higher debt and interest rates.
Additional file 5 of The microbiome of diabetic foot ulcers: a comparison of swab and tissue biopsy wound sampling techniques using 16S rRNA gene sequencing
Creators: name: J. Travis
name: M. Malone
name: H. Hu
name: A. Baten
name: K. Johani
name: F. Huygens
name: K. Vickery
name: Benkendorff, K.
Publisher: name: figshare
Year: 2020
Subjects: subject: Microbiology
subject: FOS: Biological sciences

description: Additional file 5 Supplementary Table S7. Positive control data (tissue biopsies) using tissue biopsy DNA extraction method. Supplementary Table S8. Positive control data (swabs). Supplementary Table S9. Negative control data (swabs). Supplementary Table S10. Copan swab control data. Supplementary Table S11. Quantitative PCR data for positive and negative swab controls
The Mapping Class Group acts reducibly on SU(n)-character varieties
Creators: name: Goldman, William M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 58E20, 57M30

description: When $G$ is a connected compact Lie group, and $π$ is a closed surface group, then $Hom(π,G)$ contains an open dense $Out(π)$-invariant subset which is a smooth symplectic manifold. This symplectic structure is $Out(π)$-invariant and therefore defines an invariant measure $μ$, which has finite volume. The corresponding unitary representation of $Out(π)$ on $L^2(Hom(π,G)/G,μ)$ contains no finite-dimensional subrepresentations besides the constants. This note gives a short proof that when $G=SU(n)$, the representation $L^2(Hom(π,G)/G,μ)$ contains many other invariant subspaces.
description: 6 pages, no figures
Additional file 4 of The microbiome of diabetic foot ulcers: a comparison of swab and tissue biopsy wound sampling techniques using 16S rRNA gene sequencing
Creators: name: J. Travis
name: M. Malone
name: H. Hu
name: A. Baten
name: K. Johani
name: F. Huygens
name: K. Vickery
name: Benkendorff, K.
Publisher: name: figshare
Year: 2020
Subjects: subject: Microbiology
subject: FOS: Biological sciences

description: Additional file 4 Supplementary Table S6. Demographics of 20 participants
Effect of the combination of horizontal and vertical alignments on road safety
Creators: name: Hanno, Dalal
Publisher: name: University of British Columbia
Year: 2009

description: Current design practices are based on design guidelines considering the road alignment in two dimensions only. Those guidelines were developed without considering the 3 D effect of the combined road alignment. As a result, the design process is oversimplified and does not ensure safety. The objective of this research is to investigate the effect that vertical curves have on horizontal curves and to assess the significance of different road design variables individually or in combination on collision occurrences. In addition, the effect of crest or sag curves on horizontal alignment and overall road safety is studied. As a quantitative measure of the combined effect of road alignment on safety is required, several collision prediction models are developed. The study is conducted using the data of the Trans-Canada Highway for the section between Cache Creek and the Rockies. The Generalized Linear Regression Model (GLIM) was used for finding the significance of various variables and in developing 15 collision prediction models for different combination of horizontal and vertical alignments cases. The results of the study show that the most significant variables found were the exposure variables (traffic and horizontal curve length). Other significant variables found are the value of the horizontal curve radius, the algebraic difference in vertical gradients, the percentage of overlap between the vertical and horizontal curves, the location of the vertical intersection point with respect to the horizontal curve and the ratio between the horizontal curve radius and the vertical curve radius. Some of those variables have a positive relationship with collisions, such as the traffic volume, the curve length and the algebraic difference, and some have a negative relationship, such as the horizontal curve radius, the percentage of overlap, and the distance of the vertical intersection point with respect to the horizontal curve. It has also been concluded that horizontal curves overlapping with crest curves are more prone to collisions than those overlapping with sag curves. Therefore, it is advised to avoid combining minimum horizontal curves with crest curves.
ECG beats classification via online sparse dictionary and time pyramid matching
Creators: name: Li, Nanyu
name: Si, Yujuan
name: Deng, Duo
name: Yuan, Chunyu
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Recently, the Bag-Of-Word (BOW) algorithm provides efficient features and promotes the accuracy of the ECG classification system. However, BOW algorithm has two shortcomings: (1). it has large quantization errors and poor reconstruction performance; (2). it loses heart beat's time information, and may provide confusing features for different kinds of heart beats. Furthermore, ECG classification system can be used for long time monitoring and analysis of cardiovascular patients, while a huge amount of data will be produced, so we urgently need an efficient compression algorithm. In view of the above problems, we use the wavelet feature to construct the sparse dictionary, which lower the quantization error to a minimum. In order to reduce the complexity of our algorithm and adapt to large-scale heart beats operation, we combine the Online Dictionary Learning with Feature-sign algorithm to update the dictionary and coefficients. Coefficients matrix is used to represent ECG beats, which greatly reduces the memory consumption, and solve the problem of quantitative error simultaneously. Finally, we construct the pyramid to match coefficients of each ECG beat. Thus, we obtain the features that contain the beat time information by time stochastic pooling. It is efficient to solve the problem of losing time information. The experimental results show that: on the one hand, the proposed algorithm has advantages of high reconstruction performance for BOW, this storage method is high fidelity and low memory consumption; on the other hand, our algorithm yields highest accuracy in ECG beats classification; so this method is more suitable for large-scale heart beats data storage and classification.
description: 7 pages,5 figure
Additional file 7 of Metabolic role of pyrophosphate-linked phosphofructokinase pfk for C1 assimilation in Methylotuvimicrobium alcaliphilum 20Z
Creators: name: Nguyen, Anh Duc
name: Gayoung Nam
name: Donghyuk Kim
name: Lee, Eun Yeol
Publisher: name: figshare
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 7. The Illumina NGS workflow for RNA-seq experiment.
A novel experimental approach for the detection of the dynamic Casimir effect
Creators: name: Braggio, C.
name: Bressi, G.
name: Carugno, G.
name: Del Noce, C.
name: Galeazzi, G.
name: Lombardi, A.
name: Palmieri, A.
name: Ruoso, G.
name: Zanello, D.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The Casimir effect is a well-known macroscopic consequence of quantum vacuum fluctuations, but whereas the static effect (Casimir force) has long been observed experimentally, the dynamic Casimir effect is up to now undetected. From an experimental viewpoint a possible detection would imply the vibration of a mirror at gigahertz frequencies. Mechanical motions at such frequencies turn out to be technically unfeasible. Here we present a different experimental scheme where mechanical motions are avoided, and the results of laboratory tests showing that the scheme is practically feasible. We think that at present this approach gives the only possibility of detecting this phenomenon.
description: Submitted to the Physical Review Letters. RevTeX. 4 pages, 2 figures
Deterministically fabricated quantum dot single-photon source emitting indistinguishable photons in the telecom O-band
Creators: name: Srocka, N.
name: Mrowiński, P.
name: Große, J.
name: von Helversen, M.
name: Heindel, T.
name: Rodt, S.
name: Reitzenstein, S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applied Physics (physics.app-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: In this work we develop and study single-photon sources based on InGaAs quantum dots (QDs) emitting in the telecom O-band. The quantum devices are fabricated using in-situ electron beam lithography in combination with the thermocompression bonding to realize a backside gold mirror. Our structures are based on InGaAs/GaAs heterostructures, where the QD emission is redshifted towards the telecom O-band at 1.3 μm via a strain reducing layer. QDs pre-selected by cathodoluminescence mapping are embedded into mesa structures with a back-side gold mirror for enhanced photon-extraction efficiency. Photon-autocorrelation measurements under pulsed non-resonant wetting-layer excitation are performed at temperatures up to 40 K showing pure single-photon emission which makes the devices compatible with stand-alone operation using Stirling cryocoolers. Using pulsed p-shell excitation we realize single-photon emission with high multi-photon suppression of g(2)(0) = 0.027 +- 0.005, post-selected two-photon interference of about (96 +- 10) % and an associated coherence time of (212 +- 25) ps. Moreover, the structures show an extraction efficiency of ~5 %, which compares well with values expected from numeric simulations of this photonic structure. Further improvements on our devices will enable implementations of quantum communication via optical fibers.
Observation of Bloch Oscillations and Wannier-Stark Localization on a Superconducting Processor
Creators: name: Guo, Xue-Yi
name: Ge, Zi-Yong
name: Li, Hekang
name: Wang, Zhan
name: Zhang, Yu-Ran
name: Song, Peangtao
name: Xiang, Zhongcheng
name: Song, Xiaohui
name: Jin, Yirong
name: Xu, Kai
name: Zheng, Dongning
name: Fan, Heng
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: The Bloch oscillation (BO) and Wannier-Stark localization (WSL) are fundamental concepts about metal-insulator transitions in condensed matter physics. These phenomena have also been observed in semiconductor superlattices and simulated in platforms such as photonic waveguide arrays and cold atoms. Here, we report experimental investigation of BOs and WSL simulated with a 5-qubit programmable superconducting processor, of which the effective Hamiltonian is an isotropic $XY$ spin chain. When applying a linear potential to the system by properly tuning all individual qubits, we observe that the propagation of a single spin on the chain is suppressed. It tends to oscillate near the neighborhood of their initial positions, which demonstrates the characteristics of BOs and WSL. We verify that the WSL length is inversely correlated to the potential gradient. Benefiting from the precise single-shot simultaneous readout of all qubits in our experiments, we can also investigate the thermal transport, which requires the joint measurement of more than one qubits. The experimental results show that, as an essential characteristic for BOs and WSL, the thermal transport is also blocked under a linear potential. Our experiment would be scalable to more superconducting qubits for simulating various of out-of-equilibrium problems in quantum many-body systems.
description: 8+12 pages, 4 figures
Comparison of the Parkes and FAST FRB DM Distribution
Creators: name: Arcus, W. R.
name: James, C. W.
name: Ekers, R. D.
name: Wayth, R. B.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We model the Fast Radio Burst (FRB) dispersion measure (DM) distribution for the Five-hundred-meter Aperture Spherical Telescope (FAST) and compare this with the four FRBs published in the literature to date. We compare the DM distribution of Parkes and FAST, taking advantage of the similarity between their multibeam receivers. Notwithstanding the limited sample size, we observe a paucity of events at low DM for all evolutionary models considered, resulting in a sharp rise in the observed cumulative distribution function (CDF) in the region of $1000\lesssim\mathrm{DM}\lesssim2000$ pc cm$^{-3}$. These traits could be due to statistical fluctuations ($0.12 \le p \le 0.22$), a complicated energy distribution or break in an energy distribution power law, spatial clustering, observational bias or outliers in the sample (e.g., an excessive DM_${HOST}$ as recently found for FRB 20190520B). The energy distribution in this regime is unlikely to be adequately constrained until further events are detected. Modelling suggests that FAST may be well placed to discriminate between redshift evolutionary models and to probe the helium ionisation signal of the IGM.
description: 8 pages, 2 figures. Published in MNRAS
Air-actuated pumping technology in urban drainage
Creators: name: Bohnen, D. Aaron
Publisher: name: University of British Columbia
Year: 2009

description: Airlift Pump technology is briefly summarized and the potential application of airlift technology to low-lift, low-submergence, high-flow applications such as open channel flow in urban storm drainage, is explored. Four experimental setups are described, including one prototype urban storm drainage installation. Three descriptive models for airlift pump operation are developed and one adopted for application in low-lift, low-submergence, high-flow applications. The model allows a simple design procedure for airlift pumps in this regime. A simple design hand-calculations procedure is developed, and two personal computer-based implementations are described. A simple design example is presented and recommendations for further research and development directions are made.