A monolithic silica column has recently been widely used for HPLC separation analysis. Compared with the particle−packed column (conventional column), the monolithic silica column eluted the analyte with a smaller retention factor (k), lower pressure and satisfactory separation [1]. However, the monolithic silica column has not been widely used for the HPLC or LC/MS analysis of steroids. These ...

this paper presents a new bridge management system (j-bms). it is integrated with a concrete bridge rating expert system that can be used to evaluate the serviceability of existing concrete bridges. the proposed j-bms not only evaluates the performance of bridges, but also offers a rehabilitation strategy based on a combination of maintenance cost minimization and quality maximization. in this ...

This paper presents a monolithic GaN driver with deadtime generator (DTG) for half-bridge DC-DC buck converters. The proposed integrated circuits (ICs) were fabricated in 3 µm enhancement-mode MIS-HEMTs process. DTG converter can operate at 250°C large gate swing of 10 V, and it exhibits maximum efficiency 80% high temperatures, VIN= 30 V 100 kHz. requires one control signal generates fewer tha...

Monolithic integrated lumped planar transformers were introduced more than ten years ago. We present a comprehensive review of the electrical characteristics which results in an accurate lumped low-order equivalent model. Amplifiers, mixers and Meissner-type voltage controlled oscillators using monolithic transformers have been published a few years ago. For the first time, integrated transform...

the national bridge stock of iran consists of about 330,000 bridges, of which around 50% are older than 30 years. since 2010, iran road maintenance & transportation organization has started implementing a comprehensive bridge management system in order to manage this aged stock efficiently. to predict future conditions of bridge stock, a heuristic numerical method is presented. this methodology...

The application of circular aperture frequency selective surface (FSS) for the enhancement of electromagnetic performance of monolithic half-wave radome is presented. The performance parameters of the circular aperture type FSS embedded radome panel are computed based on equivalent transmission line method in conjunction with equivalent circuit method (ECM). The EM analysis shows that the circu...