Experiment randomization

A quantity that appears in a random experiment. Random variables relate events into a set of values. 

BEYOND BINDING NUCLEIC ACIDS AS COMPONENTS OF DCC EXPERIMENTS Random 2 -amino RNAs... 

Random errors are always present and some sources are small random fluctuations in the settings of the variables which result in that the same experiments never yield exactly the same result upon repeated runs random variations of unknown factors which influence the result but which are not controlled in the experiment random events during the measurement process, e.g. spikes in signals from detectors, temperature variations in recording spectra. 

The early conductivity model of Stevels (1957) and Taylor (1956, 1959) is in a sense a random potential energy model. It is assumed in this model that the ions experience randomly varying potential energy which is due to the presence of a random structure. For the d.c. conduction, the... 

In order to obtain an appropriate design and analysis, Fisher (1966) [5] suggests three principles in performing the experiment randomization, local control (also called blocking) and replications. These can be explained as follows. 

Randomization A random assignment of experimental material to treatments prior to the start of the experiment. Randomization is vital in the experimental design process and provides (1) the basis for a valid interpretation of the experimental outcomes in terms of a test of statistical significance, and (2) the basis for computing a valid estimate of experimental error by justifying the assumption of independence of responses over experimental units. 

Some appreciation for the nitrogen nuclear characteristics may be obtained from Table 1. Because the relative sensitivities are comparable, the approximately 300-fold higher natural abundance of would seem to make it the nucleus of choice. It is even more sensitive than at natural abundance. However, like all nuclei with spin quantum number I > 1/2, possesses an electric quadrupole moment that arises from a nonspherical electric charge distribution in the nucleus itself. When placed in an electric field gradient, such as that characteristic of most molecular electron distributions, a quadrupolar nucleus experiences random fluctuating electric fields. The characteristic frequencies of these motions have components at the resonance frequency and hence afford an efficient relaxation mechanism. As a result, spin-lattice relaxation times (Tj ) are very short, 0.1-10 ms. Because Tj = To for in most molecules Lie in solution, linewidths are corres-... 

The reactor module will experience random, periodic, and transient vibrations mechanically transmitted from the launch vehicle, as well as acoustically induced random vibrations mechanically transmitted from adjacent Spaceship elements. (Ref 10- 2) These environments are typically described by a random vibration spectrum for components which are not directly excited by the acoustic environment. 

---