Ž . Ž . An ion-selective field effect transistor ISFET was applied as a potentiometric detector in liquid chromatography LC for the Ž determination of organic acids. The ISFET was prepared by coating the gate insulator of the encapsulated transistor with a poly vinyl . Ž . chloride PVC matrix membrane containing methyltridodecylammoniumchloride, which enables the detection of organic anions. Th...

In late 1973 a slow release formulation of terbutryne (2-ethylamino-6-methylthio-4-tert.-butylamino-1,3,5triazine) was introduced commercially for the control of water weeds (CIBA-Geigy (Clarosan)). Hence it will be of increasing importance for residue analysts to be able to detect low concentrations of this compound in surface waters. In the work reported here two methods are described, one, h...

Photoacoustic spectroscopy (PAS) is based on the conversion of light to acoustic waves via absorption and local thermal relaxation. Recent progress of lasers and sensitive microphones make it one of the most sensitive gas analysis tools. The other benefits of PAS are zero background signal and simple implementation of detector. Sensitivity of the detector depends on light intensity and performa...

Spatial heterodyne spectroscopy (SHS) is a Fourier-transform spectroscopic technique that simultaneously records all path differences using a detector array. Compared to conventional Fourier-transform spectroscopy that measures interferogram samples sequentially in the time domain, SHS is insensitive to a changing scene; however, the effects caused by differences in the detector elements and/or...

An adaptive iterative decision multi-feedback detection algorithm with constellation constraints is proposed for multiuser multiantenna systems. An enhanced detection and interference cancellation is performed by introducing multiple constellation points as decision candidates. A complexity reduction strategy is developed to avoid redundant processing with reliable decisions along with an adapt...

An ASIC design of Dual Edge Triggered Phase Detector(DET PD) for Delay locked loop(DLL) and Phase locked loop(PLL) applications is proposed in this paper.The proposed DET PD has high locking speed and less jitter. The designs are based on TSPC flip flop logic, which overcomes the issue of narrow capture range. The Double edge triggered phase detector dissipates less power than conventional desi...

This paper concerns receiver design for multiple-input multiple-output orthogonal frequency-division multiplexing (MIMO-OFDM) communications systems, where frequencyselective fading causes the quality of the channel to vary significantly from one subcarrier to the next. It is common practice for MIMO-OFDM detectors to implement the same detector at each subcarrier, in which case the overall per...

A new type of STEM detector has been developed and tested. This detector consists of 30 rings which are split in quadrants (= 120 channels) and it allows to take further advantage of the image formation principle of STEM: the scattered electrons can be recorded separately according to their scattering angles and eight images can be acquired in parallel. Because of its electron counting capabili...

A novel space-time adaptive near-far robust code-synchronization array detector for asynchronous DS-CDMA systems is developed in this paper. There are the same basic requirements that are needed by the conventional matched filter of an asynchronous DS-CDMA system. For the real-time applicability, a computationally efficient architecture of the proposed detector is developed that is based on the...

Screen-film image receptors have been the standard detector used in conventional mammography. New developments in detector technology and computers are altering the landscape of mammography imaging. Full Field Digital Mammography (FFDM) offers the promise of revolutionizing the practice of mammography through its superior dose and contrast performance. Advanced applications made possible throug...