نتایج جستجو برای: 01075
تعداد نتایج: 38 فیلتر نتایج به سال:
Inspired by the active color change in chameleon, Ko and co-workers have achieved adaptive camouflage an artificial chameleon robot that can actively sense surrounding colors rapidly skin with specific patterns to blend itself into background. In nature, some creatures, such as chameleons, neon tetras, cuttlefish, acquired ability adaptively their body surface or appearance characteristics merg...
Predicted daily fluxes from an ecosystem model for water, carbon dioxide, and methane were compared with 1994 and 1996 Boreal Ecosystem–Atmosphere Study (BOREAS) field measurements at sites dominated by old black spruce (Picea mariana (Mill.) BSP) (OBS) and boreal fen vegetation near Thompson, Man. Model settings for simulating daily changes in water table depth (WTD) for both sites were design...
Using a sample of 227 million Υ (4S) → BB events collected with the BABAR detector at the PEP-II B Factory in 1999–2004, we study B → D0 K (892) decays where K → K0 S π and D0 → K π+, K π+ π0, K π+ π+ π (non-CP final states), K+K−, π+ π (CP+ eigenstates), K0 S π0, K0 S φ and K0 S ω (CP− eigenstates). The partial rate charge asymmetries ACP and the ratios RCP defined in the literature as the sum...
We present updated measurements of branching fractions and CP -violating asymmetries for neutral B meson decays to two-body final states of charged pions and kaons. The results are obtained from a data sample of about 60 million Υ (4S) → BB decays collected between 1999 and 2001 by the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. The sample contains 124 −15 ππ, 403± 24 Kπ, ...
A preliminary study of time dependence of BB oscillations using dilepton events is presented. The avor of the B meson is determined by the charge sign of the lepton. To separate signal leptons from cascade and fake leptons we have used a method which combines several discriminating variables in a neural network. The time evolution of the oscillations is studied by reconstructing the time di ere...
We present preliminary results of a search for B0 → K0K0 decays in the K0 S K0 S final state using a sample of approximately 23 million BB pairs collected by the BABAR detector at the PEP-II asymmetric B Factory at SLAC. We find no evidence for a signal and set an upper limit on the branching fraction of 7.3 × 10−6 at the 90% confidence level. Submitted to the 9 International Symposium on Heavy...
We present preliminary results from a search for the rare, flavor-changing neutral current decays B → Kl+l− and B → K∗l+l−, where l+l− is either an e+e− or μ+μ− pair. The data sample comprises (84.4 ± 0.9) × 106 Υ (4S) → BB decays (77.8 fb−1) collected with the BABAR detector at the PEP-II B Factory. For B → Kl+l−, we observe a signal with estimated significance of 4.4σ and obtain B(B → Kl+l−) ...
We present updated measurements of branching fractions and CP -violating asymmetries for neutral B meson decays to two-body final states of charged pions and kaons. The results are obtained from a data sample of about 60 million Υ (4S) → BB decays collected between 1999 and 2001 by the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. The sample contains 124 −15 ππ, 403± 24 Kπ, ...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید