154 research outputs found
A New Block S-Random Interleaver for Shorter Length Frames for Turbo Codes
In this paper, we have proposed a new design of interleaver based on S-random and block interleaver. The characteristics of both block and S-random interleaver are used by this proposed interleaver. There is a large influence of free distance in turbo codes due to interleaving as it lowers the error floor. The free distance of turbo codes can be increased by designing interleaver with high spread. In this case, the overall spreading factor is increased significantly for smaller length frames also. The simulations results are compared with full S-random interleavers. The bit error rate performance of proposed interleaver for Turbo codes is much better than full s-random interleaver at the cost of small delay
Critical limit of copper in soil and plant for predicting response of oat (Avena sativa) in soils of Haryana
In order to evaluate critical level in oat (Avena sativa L.), laboratory and a screen house experiment was conducted at CCS HAU, Hisar. Bulk surface soil samples (0-15 cm) were collected from eighteen (18) different locations, in the state representing major soil groups of Haryana. The results of the study revealed that the relationship between Bray's per cent yield against DTPA-Cu in soil and Cu concentration in plants indicated critical deficiency level of Cu in soil as 0.30 mg/kgand for oat plant it was 11.7 mg/kg which was statistically also at par
Stability indicating method development and validation for simultaneous estimation of atorvastatin calcium and celecoxib in bulk and niosomal formulation by RP-HPLC
The present work describes development and validation of a specific, sensitive, precise and stability-indicating high-performance liquid chromatographic method of analysis of atorvastatin calcium and celecoxib, both as a bulk drug and in niosomal formulation. The analysis has been performed by using Cosmosil-C18 column (4.6 mm´250 mm, 5 m) at 25 °C using acetonitrile: ammonium acetate buffer pH 5.0: methanol (50:25:25 v/v/v) as mobile phase. The detection was carried out at 277nm with a flow rate of 1.0mL/min. The retention times of Atorvastatin calcium and Celecoxib were 6.195 and 3.989min, respectively. The method was validated according to ICH guidelines, for specificity, precision, linearity, accuracy and robustness. Atorvastatin calcium and Celecoxib were subjected to stress conditions of hydrolysis, oxidation, photolysis and thermal degradation. The degradation was observed in oxidation and acid hydrolysis. The linearity for atorvastatin calcium and celecoxib were in the range of 100-500 µg/mL. The recovery study of atorvastatin and celecoxib were found to be in the range of 98.96 - 99.92% and 98.90-100%, respectively. The proposed method was validated and successfully applied to the estimation of Atorvastatin calcium and Celecoxib in combined in-house niosomal formulation.O presente trabalho descreve o desenvolvimento e a validação de método de análise por cromatografia de alta eficiência específico, sensível, preciso e indicador de estabilidade de atorvastatina cálcica e celecoxibe, ambos como fármaco e como formulação niosômica. A análise foi realizada utilizando coluna Cosmosil-C18 (4,6 mm´250 mm, 5 m) a 25 °C, e acetonitrila: tampão acetato de amônio pH 5,0: metanol (50:25:25 v/v/v) como fase móvel. A detecção foi realizada a 277 nm, com fluxo de 1,0 mL/min. Os tempos de retenção de atorvastatina cálcica e de celecoxibe foram 6,195 e 3,989 min, respectivamente. O método foi validado de acordo com as regras da ICH para especificidade, precisão, exatidão e robustez. A atorvastatina cálcica e o celecoxibe foram submetidos a condições de estresse por hidrólise, oxidação, fotólise e degradação térmica. A degradação foi observada por oxidação e hidrólise ácida. Observou-se a linearidade da atorvastatina cálcica e do celecoxibe na faixa de 100-500 µg/mL. A recuperação da atorvastatina e do celecoxibe foi observada na faixa de 98,96-99,92% e 98,90-100%, respectivamente. O método proposto foi validado e aplicado com sucesso para a determinação de atorvastatina cálcica e celecoxibe em formulação niosômica caseira combinada
Stability indicating method development and validation for simultaneous estimation of atorvastatin calcium and celecoxib in bulk and niosomal formulation by RP-HPLC
Measurement of Angular Coefficients of : Implications for and Tests of Lepton Flavor Universality
We measure the complete set of angular coefficients for exclusive
decays (). Our analysis
uses the full Belle data set with hadronic tag-side
reconstruction. The results allow us to extract the form factors describing the
transition and the Cabibbo-Kobayashi-Maskawa matrix element
. Using recent lattice QCD calculations for the hadronic form
factors, we find using the BGL
parameterization, compatible with determinations from inclusive semileptonic
decays. We search for lepton flavor universality violation as a function of the
hadronic recoil parameter , and investigate the differences of the electron
and muon angular distributions. We find no deviation from Standard Model
expectations
First measurement of the Michel parameter in the decay at Belle
We report the first measurement of the Michel parameter in the
decay with a new method proposed just
recently. The measurement is based on the reconstruction of the
events with subsequent muon
decay-in-flight in the Belle central drift chamber. The analyzed data sample of
collected by the Belle detector corresponds to
approximately pairs. We measure
, which is in
agreement with the Standard Model prediction of . Statistical
uncertainty dominates in this study, being a limiting factor, while systematic
uncertainty is well under control. Our analysis proved the practicability of
this promising method and its prospects for further precise measurement in
future experiments.Comment: 6 pages, 4 figures, submitted to Phys. Rev. Let
First test of lepton flavor universality in the charmed baryon decays Ω → Ωℓν using data of the Belle experiment
We present the first observation of the Ω0c→Ω−μ+νμ decay and present measurements of the branching fraction ratios of the Ω0c→Ω−ℓ+νℓ decays compared to the reference mode Ω0c→Ω−π+, (ℓ=e or μ). This analysis is based on 89.5 fb−1, 711 fb−1, and 121.1 fb−1 data samples collected with the Belle detector at the KEKB asymmetric-energy e+e− collider at the center-of-mass energies of 10.52 GeV, 10.58 GeV, and 10.86 GeV, respectively. The Ω0c signal yields are extracted by fitting MΩℓ and MΩπ spectra. The branching fraction ratios B(Ω0c→Ω−e+νe)/B(Ω0c→Ω−π+) and B(Ω0c→Ω−μ+νμ)/B(Ω0c→Ω−π+) are measured to be 1.98±0.13(stat)±0.08(syst) and 1.94±0.18(stat)±0.10(syst), respectively. The ratio of B(Ω0c→Ω−e+νe)/B(Ω0c→Ω−μ+νμ) is measured to be 1.02±0.10(stat)±0.02(syst), which is consistent with the expectation of lepton flavor universality
Search for a Light Higgs Boson in Single-Photon Decays of ϒ(1S) Using ϒ(2S)→ππϒ(1S) Tagging Method
We search for a light Higgs boson (A) decaying into a ττ or μμ pair in the radiative decays of Υ(1S). The production of Υ(1S) mesons is tagged by Υ(2S)→ππΥ(1S) transitions, using 158×10 Υ(2S) events accumulated with the Belle detector at the KEKB asymmetric energy electron positron collider. No significant A signals in the mass range from the ττ or μμ threshold to 9.2 GeV/c are observed. We set the upper limits at 90% credibility level (C.L.) on the product branching fractions for Υ(1S)→γA and A→ττ varying from 3.8×10 to 1.5×10. Our results represent an approximately twofold improvement on the current world best upper limits for the Υ(1S)→γA(→ττ) production. For A→μμ, the upper limits on the product branching fractions for Υ(1S)→γA and A→μμ are at the same level as the world average limits, and vary from 3.1×10 to 1.6×10. The upper limits at 90% credibility level on the Yukawa coupling fΥ(1S) and mixing angle sin θ are also given
Search for the decay at Belle
We report the results of the first search for the decay
using of data collected at
the resonance with the Belle detector at the KEKB
asymmetric-energy collider. We observe no signal and set a 90\%
confidence level upper limit of on the
decay branching fraction
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