The Researcher Index aims to establish a data-driven statistical metric for quantifying researcher impact. Ultimately the challenge is in accurately quantifying the risk and return characteristics of these constructs. A number of statistical measures are available for quantifying spectral features in a simple way. There are many different molecular based test methods for quantifying the viral load using NATs. Generally this is the most popular methodology for quantifying risk. Several reliable methods for quantifying protein have been developed to simplify the process. For this reason "grab" samples are often inadequate for fully quantifying contaminant levels. Right, analysis quantifying the angiogenic effect. Glucose clamp technique is a method for quantifying insulin secretion and resistance. Echocardiography is a non-invasive method of quantifying cardiac output using ultrasound. It represents an accurate approach for quantifying the weights of decision criteria. Such a technique can be useful for quantifying an unknown rate of convergence. Hedonic pricing may also be considered in quantifying the monetary value of time saved. The usual way of quantifying partial discharge magnitude is in picocoulombs. Surveys are the most common way of quantifying organizational climate.