Consider this, your state has been hit by a cyclone with wind speeds measuring 300 kilometres per hour. All modern means of communication – telephone, cellphone, wireless sets – lie dead as the cyclone has destroyed all connecting stations and links. This is what happened during the Orissa cyclone. All communication links broke down as dish antennas, radio stations, telephone …

Half-life is the period of time it takes for a substance undergoing decay to decrease by half. The name originally was used to describe a characteristic of unstable atoms (radioactive decay), but may apply to any quantity which follows a set-rate decay.

It is an acronym for the High Frequency Active Auroral Research Program, an initiative to study the effect on the performance of communication, navigation and surveillance systems by simulated heating of the ionosphere. It was started in 1993 and is expected to continue till 2013. It is funded by US defence agencies. A powerful HF signal is transmitted to heat …

Guano is accumulated dung or excrement and remains of seabirds, bats and seals found along certain coastal areas and caves. It’s found mainly on the coastal islands of Peru, Africa, Chile and the West Indies. It contains about 6% phosphorus, 9% nitrogen, 2% potassium and moisture. Guano is found mixed with feathers and bones and used mainly as a fertilizer. …

Grounded Theory is described as a research method in which the theory is developed from the data, rather than the other way around. That makes it an inductive approach, meaning it moves from the specific to the general. The Grounded Theory was developed by two sociologists, Barney Glaser and Anselm Strauss.

Green oil is a lubricant which is non-toxic, biodegradable, petroleum-free, and less expensive. The greenwood chain saw oil was first blended by the Green Oil Company in 1992. These days, in addition to chain saw oil, it is blended with environmentally-safe hydraulic fluids like elevator oil, greases, bicycle oils and concrete form oil.

Green Fluorescent Protein (GFP) is a naturally fluorescent protein isolated from the jellyfish Aequorea victoria. GFP is a fluorescent marker that makes possible the visualisation of protein in the cell. Cells can be stained by them and examined by fluorescence microscopy to reveal the location of a protein of interest. For example, glucocorticoid receptor protein is a transcription factor that …

Green energy, or renewable / sustainable energy, is derived from a source which meets the needs of the present without getting depleted. Green energy is looked upon as the answer to climate change and as a saviour of the world. Sources of green energy – bio-fuels, solar power, wind power, wave power, geothermal power and tidal power – have begun …

Green chemistry, also called sustainable chemistry, is a philosophy of chemical research and engineering that encourages the design of products and processes that minimize the use and generation of hazardous substances. Whereas environmental chemistry is the chemistry of the natural environment, and of pollutant chemicals in nature, green chemistry seeks to reduce and prevent pollution at its source. In 1990 …

Gradenigo, an Italian otolaryngologist from the University of Naples, described this syndrome in 1904. Painful anaesthesia in the first division of the fifth cranial nerve supplying the forehead with sixth cranial nerve palsy occurs in this syndrome. It happens as a result of a lesion at the apex of petrous temporal bone outside the dura mater. It may be due …