Stable hydrogen-isotope ratios (deltaD) of keratin provide a novel means for tracking geographical movements of birds and other species. Here we describe a rapid, low cost, analytical approach to facilitate online continuous-flow isotope-ratio mass spectrometry (CF-IRMS) deltaD analyses of keratins (120-160 samples per day) through the use of calibrated keratin working standards and "comparativ...

Crowds must be simulated believable in terms of their appearance and behavior to improve a virtual environment’s realism. Due to the complex nature of human behavior, realistic behavior of agents in crowd simulations is still a challenging problem. In this paper, we propose a novel behavioral model which builds analytical maps to control agents’ behavior adaptively with agent– crowd interaction...

Multicomponent analyses were carried out for three types of urinary constituents: steroids, acids, and drugs and drug metabolites. The methods were based on gas-phase analytical techniques, which include the use of instruments and instrumental systems for gas chromatography, gas chromatogra phy-mass spectrometry, and mass spectrometry-com puterization. After isolating an analytical sample, we p...

The analysis of plasma hormone concentrations is of fundamental importance for the diagnosis and treatment of endocrine diseases. Although hormone analyses are performed in huge numbers in all hospitals on a daily basis, the interpretation of the resulting plasma hormone concentrations can be difficult. In addition to the effects of the underlying disease, biological and analytical issues affec...

Figure 1 Classification of chromatograms are based on the relative abundance of all the peaks in the mixture. Chromatography is an extremely versatile technique for the analytical laboratory. The chromatographic patterns generated by modern instruments are used in a wide variety of quantitative and qualitative analyses. The techniques are robust enough (and we have assembled experience enough) ...