This paper presents an efficient servomotor-aided calibration method for the triaxial gyroscope. The entire process only requires approximately one minute, and does not require high-precision equipment. is based on idea that measurement of gyroscope should be equal to rotation speed servomotor. A six-observation experimental design proposed minimize maximum variance estimated scale factors bias...

Isatin, N-methyl isatin and N-benzylisatin were smoothly monobrominated in the 5-position by treatment with pyridinium bromochromate (PBC) in acetic acid medium. In the similar conditions indigo underwent bromination and oxidation to give 5-bromoisatin in high yield.

     The simplest and fastest way of producing an acceptable and accurate cast is by adopting the two-pour or inversion method. This process is slightly cumbersome and messy due to difficulty of access. A much more efficient, easy and artistic way of accomplishing it is described by adopting a Rotating Cake Icing Table with a Silicone Baking Mat on top as an autoclavable non-stick barrier.