Objective(s) Physiological changes in the body may be utilized as potential triggers for controlled drug delivery. Based on these mechanisms, stimulus-responsive drug delivery has been developed. Materials and Methods In this study, a kind of poly (N-isopropylacrylamide-acrylamide) membrane was prepared by radical copolymerization. Changes in swelling ratios and diameters of the membrane wer...

Demand for higher numbers of communication channels imposes tighter phase noise performance for the local oscillators. Cross-coupled oscillators are widely used due to ease of implementation and differential operation (Figure 17.2.1a) [1,2,3]. Unfortunately, in cross-coupled VCOs the maximum noise generation instant coincides with maximum phase noise sensitivity and hence the cross-coupled VCOs...

Demand for faster data rates in wireline and wireless markets has resulted in tighter jitter and phase noise requirements for oscillators. Although active device noise (and not the resonator noise) dominates the phase noise of most CMOS oscillators [1], in a properly designed oscillator, the quality factor, Q, of the resonant tank indirectly plays a central role in the phase noise. The best pha...

LC oscillators are used most widely in wireless applications as their resonator can store energy, making its phase noise to carrier ratio given a certain power budget superior to ring oscillators. The tuning range of LC oscillators, especially at high frequencies where parasitic capacitance starts becoming significant, is another important design issue. This paper investigates the influence of ...

Single LC oscillators are known for their good phase noise performance. In this paper we analyse the effect of cross-coupling two LC oscillators in order to provide quadrature outputs, which are mandatory in modern transceiver architectures. We present a theoretical study that shows that due to coupling a frequency shift exists and the oscillator quality factor is reduced, leading to a poorer p...

this work is a primary achievement in studying the co2 and n2–oil systems. to predict gas-liquid relative permeability curves, a shan-chen type multicomponent multiphase lattice boltzmann model for two-phase flow through 2d porous media is developed. periodic and bounce back boundary conditions are applied to the model with the guo scheme for the external body force (i.e., the pressure gradient...

High Performance RF and Baseband Building Blocks for Wireless Receivers. (May 2006) Faramarz Bahmani, M.S., Tehran University Chair of Advisory Committee: Dr. Edgar Sánchez-Sinencio Because of the unique architecture of wireless receivers, a designer must understand both the high frequency aspects as well as the low-frequency analog considerations for different building blocks of the receiver. ...