The title compound, C(30)H(25)NOP(2), is a bulky phosphazene derivative. Its previous crystal structure [Cameron et al. (1979 ▶). Acta Cryst. B35, 1373-1377] is confirmed and its H atoms have been located in the present study. The formal P=N double bond is about 0.05 Å shorter than the P-N single bond and the large P=N-P bond angle reflects the steric strain in the mol-ecule. An intra-molecular...

Sun-synchronous exploration is accomplished by reasoning about sunlight: where the Sun is in the sky, where and when shadows will fall, and how much power can be obtained through various courses of action. In July 2001 a solar-powered rover, named Hyperion, completed two sunsynchronous exploration experiments in the Canadian high arctic (75°N). Using knowledge of orbital mechanics, local terrai...

Hydro-electric power utilities convert the potential energy of water to electricity through the operation of generation turbines. Each turbine unit has an operating range and incurs a fixed start-up cost. The problem of determining which turbines should be operating at any point during the day whilst ensuring that the demand for electricity is satisfied is known as the unit commitment problem. ...

Strains of staphylococci prevalent in hospitals have been characterized by antibiotic-sensitivity patterns, phage type, serotype, and other criteria. Recently, T. Hofstad and P. Oeding (Acta Pathol. Microbiol. Scand. Suppl. 154, p. 311, 1962) reported on the development of a factor serum, 263-1, which agglutinated phage group I strains predominantly. This note is a corroboration of the findings...

In a three-component system containing dibenzo-24-crown-8 (1), diamino-dibenzo-24-crown-8 (2), and 1,2-bis(4,4(')-dipyridyl)ethane (3(2+)), axle 3(2+) can shuttle between wheels 1 and 2 by acid-base control, accompanying color changes from yellow to red. This system could not only be taken as a chromophoric supramolecular switch, but also exhibit a function as INHIBIT logic gate.

----------------------------------------------------------------------ABSTRACT-------------------------------------------------------------Steganography is derived from the Greek word steganos which literally means “Covered” and graphy means “Writing”, i.e. covered writing. Steganography refers to the science of “invisible” communication. For hiding secret information in various file formats, t...