15 research outputs found
On polar Legendre polynomials
No full text10 pages, no figures.-- MSC2000 codes: Primary 42C05; Secondary 33C25.-- ArXiv pre-print available at: http://arxiv.org/abs/0709.4537Accepted in Rocky Mountain Journal of Mathematics.We introduce a new class of polynomials {Pn}, that we call polar Legendre polynomials, they appear as solutions of an inverse Gauss problem of equilibrium
position of a field of forces with n + 1 unit masses. We study algebraic, differential
and asymptotic properties of this class of polynomials, that are simultaneously
orthogonal with respect to a differential operator and a discrete-continuous Sobolev
type inner product.Research by first author (H.P.) was partially supported by Dirección General de Investigación, Ministerio de Ciencia y Tecnología de España, under grant MTM2006-13000-C03-02, by Comunidad de Madrid-Universidad Carlos III de Madrid, under grant CCG06-UC3M/EST-0690 and by Centro de Investigación Matemática de Canarias (CIMAC). Research by second author (J.Y.B.) was supported by CNPq-TWAS. Research by third author (W.U.) was partially supported by Centro de Investigación Matemática de Canarias (CIMAC).En prens
Analysis of the Effect of Microinteraction in Instagram Application on the Users
No full textBefore we know it, digital media has grown and changed rapidly. One of the most common media is social media. According to datareportal. com in Digital 2020: Indonesia, 160 million people in Indonesia use social media and spend 3 hours 26 minutes every day on social media applications, and 63 millions of them are Instagram users [1]. An application/web/game always has micro-interaction, including Instagram. Micro interaction is detailed interaction to make users know everything they are currently doing or has done by making feedback in small animation to have more attachment to the application. In the present paper, the author analyses the micro-interaction in Instagram application based on literature and the micro-interaction effect in helping users use Instagram application using the qualitative method of In-Depth Interview with 6 users. The interview result produced a conclusion on the effect of micro-interaction in Instagram application on the users
The Effect Of Brisk Walking Exercise On Reducing Sugar Levels In Type 2 Diabetes Mellitus Patients At East Kolaka District Hospital
No full textDiabetes mellitus is a group of metabolic diseases with the characteristics of hyperglycemia that occurs due to abnormalities in insulin secretion, insulin action or both. The purpose of this research is to determine the effect of British walking exercise on reducing blood sugar levels in type 2 diabetes mellitus patients at East Kolaka Regency Hospital. This type of research is quantitative using a pre-experimental design with a one-group pretest-postest design approach. The research samples were patients diagnosed with diabetes mellitus type 2 at East Kolaka Regency Hospital with a total sample of 14 people. The sampling technique used is 2015purposive sampling. The results of the statistical test obtained the average value of blood sugar levels before the intervention (pretest) was 220.36 mg/dl while the average value of blood sugar levels after the intervention (posttest) was 190.64 mg/dl. The results of the Paired t-test statistical test obtained a p value of 0.000 which means that the p value ≤ alpha value of 0.05 which means that H0 is rejected and H1 is accepted. Thus, it can be concluded that there is an effect on Brisk walking exercise on blood sugar level values in patients with type 2 diabetes at East Kolaka Regency Hospital
A comon genomic framework for a diverse assembly of plasmids in the symbiotic nitrogen fixing bacteria
No full textThis work centres on the genomic comparisons of two closely-related nitrogen-fixing symbiotic bacteria, Rhizobium leguminosarum biovar viciae 3841 and Rhizobium etli CFN42. These strains maintain a stable genomic core that is also common to other rhizobia species plus a very variable and significant accessory component. The chromosomes are highly syntenic, whereas plasmids are related by fewer syntenic blocks and have mosaic structures. The pairs of plasmids p42f-pRL12, p42e-pRL11 and p42b-pRL9 as well large parts of p42c with pRL10 are shown to be similar, whereas the symbiotic plasmids (p42d and pRL10) are structurally unrelated and seem to follow distinct evolutionary paths. Even though purifying selection is acting on the whole genome, the accessory component is evolving more rapidly. This component is constituted largely for proteins for transport of diverse metabolites and elements of external origin. The present analysis allows us to conclude that a heterogeneous and quickly diversifying group of plasmids co-exists in a common genomic framework
Cardiovascular Risk with Non-Steroidal Anti-Inflammatory Drugs: Systematic Review of Population-Based Controlled Observational Studies
No full textThis is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited
Influence of grilling pretreatment and optimization of sous vide processing parameters on the physicochemical and microbiological quality of pirarucu fillet
No full textThe demand for high-quality food products has promoted the study of techniques for its processing and conservation. The present research aimed to evaluate the influence of grilling pretreatment on the physical characteristics of pirarucu fillets and the heat transfer process by a computational modelling, and to optimize the sous vide process parameters. Before and after the sous vide process, the samples were analysed for microbiological, chemical and physical characteristics. There was no significant difference between the total experimental time of grilling and that obtained by computational modelling. Immersion in brine for 300s in combination with grilling at 200/120s was selected because of its water-holding capacity (%) 79.40±0.31, texture (N) 1.91±0.40 and value of L* 74.44±0.38 in the fillets. Cooking at 60 for 568.8s were the best sous vide parameters obtained, with highest water-holding capacity (%) 93.60, texture (N) 6.24, E* 7.43, and with microbiological loads below 6 log CFU/g and 7 log MPN/g in the final product. Useful information obtained from this study highlighted the brine and grill pretreatment in combination with sous vide proved it is a potential solution for developing pirarucu products even at an industrial scale.The author(s) disclosed receipt of the following financial support for the research, authorship, and/ or publication of this article: The work behind this paper was funded by the Coordenação de Aperfeiçoamento de Pessoal de Nivel Superior – CAPES, Brazil. Enrique Pino-Herna´ndez thanks to the Organization of American States (OAS – United States) and the Coimbra Group of Brazilian Universities (GCUB) under the scope of Partnerships Program for Education and Training (PAEC) to Latin America and the Caribbean, by the scholarship received for studying a Master program in the Federal University of Para´ (call Brazil, OASGCUB 2013).info:eu-repo/semantics/publishedVersio
Galaxy And Mass Assembly (GAMA) : galaxy close pairs, mergers and the future fate of stellar mass
No full textASGR acknowledges STFC and SUPA funding that were used to do this work. GAMA is funded by the STFC (UK), the ARC (Australia), the AAO and the participating institutions.We use a highly complete subset of the Galaxy And Mass Assembly II (GAMA-II) redshift sample to fully describe the stellar mass dependence of close pairs and mergers between 10(8) and 10(12)M(circle dot). Using the analytic form of this fit we investigate the total stellar mass accreting on to more massive galaxies across all mass ratios. Depending on how conservatively we select our robust merging systems, the fraction of mass merging on to more massive companions is 2.0-5.6 per cent. Using the GAMA-II data we see no significant evidence for a change in the close pair fraction between redshift z = 0.05 and 0.2. However, we find a systematically higher fraction of galaxies in similar mass close pairs compared to published results over a similar redshift baseline. Using a compendium of data and the function gamma(M) = A(1 + z)(m) to predict the major close pair fraction, we find fitting parameters of A = 0.021 +/- 0.001 and m = 1.53 +/- 0.08, which represents a higher low-redshift normalization and shallower power-law slope than recent literature values. We find that the relative importance of in situ star formation versus galaxy merging is inversely correlated, with star formation dominating the addition of stellar material below M* and merger accretion events dominating beyond M*. We find mergers have a measurable impact on the whole extent of the galaxy stellar mass function (GSMF), manifest as a deepening of the 'dip' in the GSMF over the next similar to Gyr and an increase in M* by as much as 0.01-0.05 dex.Peer reviewe
Investigating the inner discs of Herbig Ae/Be stars with CO bandhead and Brγ emission
No full textJDI gratefully acknowledges funding from the European Union FP7-2011 under grant agreement no. 284405. JRF gratefully acknowledges a studentship from the Science and Technology Facilities Council of the UK. SK acknowledges support through an STFC Ernest Rutherford fellowship.Herbig Ae/Be stars lie in the mass range between low- and high-massyoung stars, and therefore offer a unique opportunity to observe anychanges in the formation processes that may occur across this boundary.This paper presents medium-resolution Very Large Telescope(VLT)/X-shooter spectra of six Herbig Ae/Be stars, drawn from a sampleof 91 targets, and high-resolution VLT/Cryogenic Infrared EchelleSpectrograph (CRIRES) spectra of five Herbig Ae/Be stars, chosen basedon the presence of CO first overtone bandhead emission in their spectra.The X-shooter survey reveals a low detection rate of CO first overtoneemission (7 per cent), consisting of objects mainly of spectral type B.A positive correlation is found between the strength of the CO v = 2-0and Brγ emission lines, despite their intrinsic linewidthssuggesting a separate kinematic origin. The high-resolution CRIRESspectra are modelled, and are well fitted under the assumption that theemission originates from small scale Keplerian discs, interior to thedust sublimation radius, but outside the corotation radius of thecentral stars. In addition, our findings are in very good agreement forthe one object where spatially resolved near-infrared interferometricstudies have also been performed. These results suggest that the HerbigAe/Be stars in question are in the process of gaining mass via discaccretion, and that modelling of high spectral resolution spectra isable to provide a reliable probe into the process of stellar accretionin young stars of intermediate to high masses.Peer reviewe
Total eclipse of the heart: : the AM CVn Gaia14aae/ASSASN-14cn
No full textWe report the discovery and characterization of a deeply eclipsing AM CVn-system, Gaia14aae (=ASSASN-14cn). Gaia14aae was identified independently by the All-Sky Automated Survey for Supernovae (ASAS-SN; Shappee et al.) and by the Gaia Science Alerts project, during two separate outbursts. A third outburst is seen in archival Pan-STARRS-1 (PS1; Schlafly et al.; Tonry et al.; Magnier et al.) and ASAS-SN data. Spectroscopy reveals a hot, hydrogen-deficient spectrum with clear double-peaked emission lines, consistent with an accreting double-degenerate classification. We use follow-up photometry to constrain the orbital parameters of the system. We find an orbital period of 49.71 min, which places Gaia14aae at the long period extremum of the outbursting AM CVn period distribution. Gaia14aae is dominated by the light from its accreting white dwarf (WD). Assuming an orbital inclination of 90° for the binary system, the contact phases of the WD lead to lower limits of 0.78 and 0.015 M⊙ on the masses of the accretor and donor, respectively, and a lower limit on the mass ratio of 0.019. Gaia14aae is only the third eclipsing AM CVn star known, and the first in which the WD is totally eclipsed. Using a helium WD model, we estimate the accretor's effective temperature to be 12 900 ± 200 K. The three outburst events occurred within four months of each other, while no other outburst activity is seen in the previous 8 yr of Catalina Real-time Transient Survey (CRTS; Drake et al.), Pan-STARRS-1 and ASAS-SN data. This suggests that these events might be rebrightenings of the first outburst rather than individual events.Peer reviewe
Insight into spin transport in oxide heterostructures from interface-resolved magnetic mapping.
No full text© 2015 Macmillan Publishers Limited.
We acknowledge financial support from the European Research Council (ERC Advanced Grant FEMMES, No. 267579) and the Labex NanoSaclay project FIRET. The ALICE project is supported by the BMBF Contract No. 05K10PC2. The research leading to these results has received funding from the European Community’s Seventh Framework Programme (FP7/2007–2013) under grant agreement no. 226716. Work at UCM was supported by grants MAT2011-27470-C02 and Consolider Ingenio 2010—CSD2009- 00013 (Imagine), by CAM through grant S2009/MAT-1756 (Phama) and by the ERC starting Investigator Award, grant #239739 STEMOX. Microscopy at ORNL (M.V.) was supported by the US Department of Energy, Office of Science, Basic Energy Sciences, Materials Science and Engineering Division. We thank N.M. Nemes and M. Garcı´a- Herna´ndez for collaboration and assistance with the preliminary magnetic characterization of the LSMO/LFO structures and V. Garcia for his constructive comments.
Author contributions: F.Y.B., J.S., A.B. and M.B. designed and conceived the experiment. F.Y.B. and A.R.-C. were involved in sample growth and characterization. F.Y.B. and C.V were involved in lithography process and transport measurements. S.V. conceived the synchrotron experiments. F.Y.B., S.V., R.A., J.T., A.A.U¨ . and A.R.-C. were involved in synchrotron measurements and data analysis. M.V. and S.J.P. performed electron microscopy. M.N.G. and M.B performed tunnelling magneto-resistance simulations. F.Y.B., M.N.G., C.V., Z.S., C.L., J.E.V., J.S., A.B. and M.B analyzed the data and discussed the manuscript. F.Y.B. and M.B. wrote the article with inputs from all co-authors.
Competing financial interests: The authors declare no competing financial interests.At interfaces between complex oxides, electronic, orbital and magnetic reconstructions may produce states of matter absent from the materials involved, offering novel possibilities for electronic and spintronic devices. Here we show that magnetic reconstruction has a strong influence on the interfacial spin selectivity, a key parameter controlling spin transport in magnetic tunnel junctions. In epitaxial heterostructures combining layers of antiferromagnetic LaFeO_3 (LFO) and ferromagnetic La_0.7Sr_0.3MnO_3 (LSMO), we find that a net magnetic moment is induced in the first few unit planes of LFO near the interface with LSMO. Using X-ray photoemission electron microscopy, we show that the ferromagnetic domain structure of the manganite electrodes is imprinted into the antiferromagnetic tunnel barrier, endowing it with spin selectivity. Finally, we find that the spin arrangement resulting from coexisting ferromagnetic and antiferromagnetic interactions strongly influences the tunnel magnetoresistance of LSMO/LFO/LSMO junctions through competing spin-polarization and spin-filtering effects.Unión Europea. FP7Comunidad Autónoma de MadridMinisterio de Economía y Competitividad (MINECO)Labex NanoSaclay project FIRETALICE Project (BMBF)Bundesministerium für Bildung und Forschung (BMBF), AlemaniaEuropean Research CouncilPrograma Consolider-Ingenio (Imagine), MINECO, EspañaERC starting Investigator Award STEMOXUS Department of Energy, Office of Science, Basic Energy Sciences, Materials Science and Engineering DivisionPHOTONIC ADVANCED MATERIALS: PHAMA 2.0-CM PROGRAMMEConsejo Superior de Investigaciones Científicas (CSIC), EspañaDepto. de Estructura de la Materia, Física Térmica y ElectrónicaFac. de Ciencias FísicasTRUEpu
