Commercial capacitance bridges are used as accurate transfer standards in the calibration of fused-silica capacitors. Tedious manual bridge measurements are still the basis for transferring the unit of capacitance from the calculable capacitor, which realizes the farad, to the U.S. representation of the farad, which is a bank of 10 pF fused-silica… (More)
—We describe dissipation factor measurements of 10 pF fused-silica capacitance standards from 50 Hz to 20 kHz, using a toroidal cross capacitor and a 10 pF nitrogen-filled capacitor as the references. The relative combined standard uncertainties are 0.56×10-6 , 0.16×10-6 , and 0.26×10-6 at 100 Hz, 1 kHz, and 10 kHz, respectively.
Gas mixtures containing cC 4 F 8 /Ar are commonly used for the plasma etching of dielectric materials such as SiO 2. To quantify the dependence of fundamental plasma parameters of systems using these mixtures, inductively coupled plasmas in the pressure range of 6 –20 mTorr, with and without magnetic confinement, were investigated. Measurements were also… (More)
We established a red callus from the leaves of a red-fleshed apple individual, which was a hybrid offspring of the cross between Malus sieversii f. niedzwetzkyana and Malus domestica cv. ‘Fuji’. We analyzed callus growth and anthocyanin biosynthesis/metabolism under different combinations of temperature and light conditions. Incubation in darkness resulted… (More)
OBJECTIVES Identifying patients at risk of a 30-day readmission can help providers design interventions, and provide targeted care to improve clinical effectiveness. This study developed a risk model to predict a 30-day inpatient hospital readmission for patients in Maine, across all payers, all diseases and all demographic groups. METHODS Our objective… (More)
— We describe dissipation factor measurements of 1 pF, 10 pF, and 100 pF fused-silica capaci-tance standards from 50 Hz to 20 kHz, using a toroidal cross capacitor and a 10 pF nitrogen-filled capacitor as the references. We also describe an analytical model that relates the dissipation factor of a capacitor to the frequency dependence of its capacitance.