874 resultados para Stars: Wolf-Rayet - circumstellar matter
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UBVRI data are presented for a set of 229 late-type stars, most of them being high proper motion stars. All these data are part of the Input Catalog planned observations for the Hipparcos mission.
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UVBY-Beta photometric data are presented for 67 stars in the region of alpha-Persei and their relationship to the cluster is analyzed. These data allowed us to confirm at least 16 new members of the alpha-Persei open cluster.
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As indicated by Grenon (1989), the data of the present series of reports on the UBVRI photometry of late-type stars in the Hipparcos Input Catalog are to be employed in computations of Hipparcos observing time, as well as in evaluating the observability of faint stars by the satellite. Attention is here given to late type stars in the V = 8-12 range, including distant red giants in the Galactic plane (Hipparcos proposal 189), as well as high proper motion stars included in the G, LTT, LP, and MCC catalogs.
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uvby H-beta photometry has been obtained for a sample of 93 selected main sequence A stars. The purpose was to determine accurate effective temperatures, surface gravities, and absolute magnitudes for an individual determination of ages and parallaxes, which have to be included in a more extensive work analyzing the kinematic properties of A V stars. Several calibrations and methods to determine the above mentioned parameters have been reviewed, allowing the design of a new algorithm for their determination. The results obtained using this procedure were tested in a previous paper using uvby H-beta data from the Hauck and Mermilliod catalogue, and comparing the rusulting temperatures, surface gravities and absolute magnitudes with empirical determinations of these parameters.
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No-tillage systems, associated to black oat as preceding cover crop, have been increasingly adopted. This has motivated anticipated maize nitrogen fertilization, transferring it from the side-dress system at the stage when plants have five to six expanded leaves to when the preceding cover crop is eliminated or to maize sowing. This study was conducted to evaluate the effects of soil tillage system and timing of N fertilization on maize grain yield and agronomic efficiency of N applied to a soil with high organic matter content. A three-year field experiment was conducted in Lages, state of Santa Catarina, from 1999 onwards. Treatments were set up in a split plot arrangement. Two soil tillage systems were tested in the main plots: conventional tillage (CT) and no-tillage (NT). Six N management systems were assessed in the split-plots: S1 - control, without N application; S2 - all N (100 kg ha-1) applied at oat desiccation; S3 - all N applied at maize sowing; S4 - all N side-dressed when maize had five expanded leaves (V5 growth stage); S5 - 1/3 of N rate applied at maize sowing and 2/3 at V5; S6 - 2/3 of nitrogen rate applied at maize sowing and 1/3 at V5. Maize response to the time and form of splitting N was not affected by the soil tillage system. Grain yield ranged from 6.0 to 11.8 t ha-1. The anticipation of N application (S2 and S3) decreased grain yield in two of three years. In the rainiest early spring season (2000/2001) of the experiment, S4 promoted an yield advantage of 2.2 t ha-1 over S2 and S3. Application of total N rate before or at sowing decreased the number of kernels produced per ear in 2000/2001 and 2001/2002 and the number of ears produced per area in 2001/2002, resulting in reduced grain yield. The agronomic efficiency of applied N (kg grain increase/kg of N applied) ranged from 13.9 to 38.8 and was always higher in the S4 than in the S2 and S3 N systems. Short-term N immobilization did not reduce grain yield when no N was applied before or at maize sowing in a soil with high organic matter content, regardless of the soil tillage system.
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Purpose: Results of some PCI clinical trials indicated more procedure related complications and worse clinical outcomes in women than men, but due to a lower representation of female patients this question still remains open. We aimed toinvestigate characteristics and early and late clinical outcomes in female patients as compared to male when treated in a real life setting with a new generation DES.Methods: Among 3069 consecutive patients treated with Nobori DES, and enrolled in NOBORI 2 study, 675 were female. The primary endpoint of the study is target lesion failure (TLF), a composite of cardiac death, MI and target lesion revascularization (TLR) at 12 months. Data are entered in an electronic database; all adverse events are adjudicated by an independent clinical event committee and independent corelabs analyse all angiograms.Results: Compared to male patients, female patients were significantly older (68±10 vs ± 63±11 years; p<0.001), had higher incidence of diabetes (37% vs 27%; p<0.001) and hypertension (75% vs 66%; p<0.001), but lower frequency of previous MI, PCI/CABG and smoking history. Lesion characteristics were similar in two genders, except for lesions located at bifurcation which were more frequent inmale patients (22% vs 15% inmale and female patients respectively; p<0.001). Majority of QCA assessed parameters were similar with the exception for RVD, post-procedure MLD in-segment and %DS in-stent which were significantly lower in female patients (p<0.05 for all). In table 1 results at 6 months follow-up are presented and at the time of presentation 1 year results will be available. Table 1. Clinical results at 6 months follow-up Male (n=2394) Female (n=675) P value Cardiac Death 12 (0.5%) 5 (0.7%) 0.5550 MI 5 (2.1%) 4 (1.3%) 0.5089 TLR rate 17 (0.7%) 13 (1.9%) 0.0124 TLF rate 44 (1.8%) 17 (2.5%) 0.2745 Stent Thrombosis 12 (0.5%) 6 (0.9%) 0.2548Conclusions: Results indicate that there are differences in the demographics and risk factors in female and male patient's population. The frequency of adverse events at 6 months is low in both populations, showing trend toward slightly higher rate in female patients, particularly for target lesion revascularization.
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[spa] La conceptuación de talento ha ido cobrando cada vez más importancia tanto para académicos como profesionales, con el fin de avanzar en el estudio de la gestión del talento. De hecho, la confusión sobre el significado de talento en la realidad empresarial impide llegar a un consenso sobre el concepto y la práctica de la gestión del talento. En este estudio teórico revisamos el concepto de talento en el mundo de la empresa con el fin de resumir lo que hemos aprendido y discutir las ventajas y limitaciones de las diferentes acepciones. Concluimos con la formulación de una definición de este concepto, ya que una correcta interpretación de la gestión del talento—por no hablar de una exitosa gestión del talento— depende de tener una comprensión clara de lo que se entiende por talento en un contexto organizativo. Además, con la definición de talento propuesta delimitamos el concepto de talento evitando algunos problemas detectados en las definiciones anteriores (por ejemplo, generalidades y tautologías), y poniendo de relieve las variables importantes que le afectan y lo hacen más manejable.
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Fertility properties, total C (Ctot), and chemical soil organic matter fractions (fulvic acid fraction - FA, humic acid fraction - HA, humin fraction - H) of anthropogenic dark earths (Terra Preta de Índio) of the Amazon basin were compared with those of Ferralsols with no anthropogenic A horizon. Terra Preta soils had a higher fertility (pH: 5.1-5.4; Sum of bases, SB: 8.93-10.33 cmol c kg-1 , CEC: 17.2-17.5 cmol c kg-1 , V: 51-59 %, P: 116-291 mg kg-1) and Ctot (44.6-44.7 g kg-1) than adjacent Ferralsols (pH: 4.4; SB: 2.04 cmol c kg-1, CEC: 9.5 cmol c kg-1, V: 21 %, P 5 mg kg-1, C: 37.9 g kg-1). The C distribution among humic substance fractions (FA, HA, H) in Terra Preta soils was also different, as shown by the ratios HA:FA and EA/H (EA=HA+FA) (2.1-3.0 and 1.06-1.08 for Terra Preta and 1.2 and 0.72 for Ferralsols, respectively). While the cation exchange capacity (CEC), of Ferralsols correlated with FA (r = 0.97), the CEC of Terra Preta correlated with H (r = 0.82). The correlation of the fertility of Terra Preta with the highly stable soil organic matter fraction (H) is highly significant for the development of sustainable soil fertility management models in tropical ecosystems.
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A publication of the IDPH Division of Behavioral Health to find out what's happening with Substance Abuse Prevention and Treatment.
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A publication of the IDPH Division of Behavioral Health to find out what's happening with Substance Abuse Prevention and Treatment.
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A publication of the IDPH Division of Behavioral Health to find out what's happening with Substance Abuse Prevention and Treatment.
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A publication of the IDPH Division of Behavioral Health to find out what's happening with Substance Abuse Prevention and Treatment.
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A publication of the IDPH Division of Behavioral Health to find out what's happening with Substance Abuse Prevention and Treatment.
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A publication of the IDPH Division of Behavioral Health to find out what's happening with Substance Abuse Prevention and Treatment.