— This paper investigates the concept of using body bias as a design tool to optimize the timing jitter and power dissipation in single ended CMOS ring oscillators. A theoretical model for phase noise and timing jitter in ring oscillators is summarized and used as a basis for simulation of the impulse sensitivity function. Simulation results are then used to estimate timing jitter and phase noi...

In the title compound, C16H9ClO4 the dihedral angle between the coumarin ring system [maximum deviation = 0.023 (1) Å] and the benzene ring is 73.95 (8)°. In the crystal, π-π inter-actions link the dimers into a three-dimensional framework. A quantum chemical calculation is in generally good agreement with the observed structure, although the calculated dihedral angle between the ring systems (...

A ring $R$ with an automorphism $sigma$ and a $sigma$-derivation $delta$ is called $delta$-quasi-Baer (resp., $sigma$-invariant quasi-Baer) if the right annihilator of every $delta$-ideal (resp., $sigma$-invariant ideal) of $R$ is generated by an idempotent, as a right ideal. In this paper, we study Baer and quasi-Baer properties of skew PBW extensions. More exactly, let $A=sigma(R)leftlangle x...

In this paper, an artificial neural network model is proposed to find out the resonant frequency of a metamaterial based Hexagonal Split Ring Resonator (SRR). The main advantage of Hexagonal SRR is small electrical size at resonance (electrically small) in the microwave regime. The method can be used for a wide range of different depending parameters (effective radius of the Hexagonal ring, spl...

A companion analysis of clock jitter and phase noise of single-ended and differential ring oscillators is presented. The impulse sensitivity functions are used to derive expressions for the jitter and phase noise of ring oscillators. The effect of the number of stages, power dissipation, frequency of oscillation, and shortchannel effects on the jitter and phase noise of ring oscillators is anal...

OBJECTIVE To assess the contraceptive efficacy, user acceptability, cycle control, and tolerability of a combined contraceptive vaginal ring for up to 13 cycles. MATERIALS AND METHODS Healthy women coming to the OPD for contraceptive advice were enrolled in this one-year study. Each ring was used for three weeks followed by a one-week ring-free period. RESULTS A total of 184 women started t...

We present observations of the spiral galaxy NGC 7331 using the Sub-millimetre Common User Bolometer Array (SCUBA) on the James Clark Maxwell Telescope. We have detected a dust ring of 45 arcsec radius (3.3 kpc) at wavelengths of 450 and 850-μm. The dust ring is in good correspondence with other observations of the ring in the mid-infrared (MIR), CO and radio-continuum, suggesting that the obse...

A 25 year-old Construction worker underwent neck laceration following penetrating neck trauma in a falling incident. The 3rd tracheal ring was injured which was initially repaired and the patient was discharged in good general condition. (Figure 1 shows the patient’s neck view after discharge from hospital).Two months later the patient was again admitted due to provocative coughing and a metal ...

A new class of wideband ring-type microstrip bandpass filter is proposed under smaller size of three quarters waveguide length section. One via hole is placed at perpendicular positions of a squared ring, whereas two short-circuited sections are formed in the ring-type microstrip bandpass filter similar to a dual-mode ring filter in shape, thereby making up a three quarters waveguide length rin...

A new type of hybrid ring coupler (or rat-race coupler) the gap-waveguide ring hybrid has been developed in this work. The advantages of the new gap-waveguide ring hybrid are low manufacturing cost since the good electrical contact between metal plates is not required, and lower transmission loss compared to microstrip line since there is no dielectric material needed. Therefore, the gap-wavegu...