1. Bhave G, Lindan CP, Hudes ES, Desai S, Wagle U, Tripathi SP, et al. Impact of an intervention on HIV, sexually transmitted diseases, and condom use among sex workers in Bombay, India. AIDS 1995;9:S21-30. 2. Lanjewar DN, Shroff HJ, Kohli MA, Hira SK. High occurrence of Hepatitis B among STD clinic attenders in Mumbai, India. Internat J STD AIDS 1998;9:1101-3. 3. Lakshmi N, Kumar AG. HIV Infec...

The normalized light scattering polarization matrix has been measured for ocean water using an electrooptic light scattering polarimeter. Measurements were done on samples from the Atlantic and Pacific Oceans and the Gulf of Mexico. The polarization effects in the matrices were found to have, in general, a form which is similar to polarization effects in the Rayleigh scattering approximation; f...

In this paper, an ultra-wideband (UWB) common gate low-noise amplifier (LNA) with -boosted and noise-cancelling techniques is presented. In this scheme we utilize gm-boosted stage for cancelling the noise of matching device. The bandwidth extension and flat gain are achieved by using of series and shunt peaking techniques. Simulated in .13 um Cmos technology, the proposed LNA achieved 2.38-3.4d...

Optimization of design parameters based on electromagnetic simulation of microwave circuits is a timeconsuming and iterative procedure. To provide a fast and accurate frequency response for a given case study, this paper employs a neural network modelling approach. First, one of the case study's outputs, i.e., scattering parameter (|S21|) in dB, is predicted using a neural network model. Then t...

In this paper an ultrawideband low noise amplifier is proposed. The structure is based on 0.18 μm CMOS technology. The design is based on the current reusing structure to provide the wide band characteristics. A wideband flat gain (S21) about 20dB is achieved, stability of the structure over the whole desired frequency range is provided. Due to careful selection of the elements and biasing cond...

An air–sea interaction model that includes turbulent transport due to capillary waves (surface ripples) is developed. The model differs from others in that the physical premises are applicable to low wind speeds (10-m wind speed, U10 , 5 m s21) as well as higher wind speeds. Another new feature of the model is an anisotropic roughness length, which allows a crosswind component of the stress to ...

A novel compact textile antenna with the appearance of a button on clothing for body-centric wireless communications systems (BWCS) is presented. The antenna is placed on a textile substrate and fed by a coaxial line through the ground plane. The operating bandwidth of the antenna has met the requirement of the UWB communication system. The effects of the human body on S11 and S21 are presented...

The paper presents an improved equivalent circuit parameters extraction method for the dumbbell-shaped defected ground structure (DGS). The new extraction parameters equations are obtained in closed-form expressions, which contain S11 and S21. The DGS unit with center frequency of 5 GHz is designed and fabricated on a TLX substrate with thickness of 1 mm and dielectric constant of 2.55. The cir...

This paper presents the design and simulation of Low Noise Amplifier (LNA) in a 0.18μm CMOS technology. The LNA function is to amplify extremely low noise amplifier without adding noise and preserving required signal to noise ratio. Cadence design tool Spectre_RF is used to design and simulation based on resistors, inductors, capacitors and transistors. Power constrained methodology is used for...

This special issue of Soil Science celebrates the enormous accomplishments made during the past century or more in the field of soil science, including some of the key articles published in Soil Science during its 90 years of existence. In this article, we focus on the contributions in soil physics, exemplified by the articles of Willard Gardner (1919) and John Philip (1957c), both of which are...