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We know and understand that compost is "Backyard Magic" because compost helps restructure the soil, it reconditions the soil, it helps the soil hold onto its water protecting it from drought and erosion, and most importantly it puts nutrients back into the soil thus putting nutrients back into our food to help us stay healthy. There is just nothing comparable to the taste and value of food grown in organically healthy soil. By now you may be asking yourself this question: "So how does a compost pile work?"

To help you understand, I will give you a general explanation of how a compost pile works.

When leaves drop from a tree, they decay into soft black humus over time, without any help from people. When an animal dies, its remains slowly return to the earth. Anything that once lived will eventually decompose.

Composting is based on this natural process and begins with the thousands of micro-organisms which live naturally in soil. They feed on a moist heap of organic waste materials (food), generating considerable heat in the process. Other groups of decomposer organisms go to work as the temperature rises, an ever-changing workforce of bacteria, fungi, and insects.

When the temperature drops, turning or stirring the pile gives the decomposers more oxygen and the heat builds again, helping to kill harmful bacteria. When all the easily decomposed material has been consumed, the temperature drops for the last time and earthworms and ants may move in, signalling that the compost is ready to feed new plants with its recycled nutrients.

Finished compost has the distinctive fresh smell of newly-turned soil or a forest floor in spring, and it wont heat up again no matter how often you turn air into the pile. The ideal result of the composting process is crumbly, dark, soil-like humus where none of the original material can be identified. The nutrients stored in compost depend on the richness and variety of its ingredients and on its exposure to harsh weather. However, experienced gardeners know there is no such thing as bad compost!

Bio: A gardener for years, Marcelle has learned the value of composting and using it to put nutrients back into the soil. You can download her FREE 12-page Composting MiniHandbook at her blog: http://www.OrganicGardeningClub.com

Satellite phone systems are now getting popular because of the need for people to communicate even from the remote corner of the world. Communication is taking new strides of its own and mere cable connections and radio lines are not able to satisfy the growing need for wider coverage.

Satellite phone systems are now necessary, because the cable lines cannot be fixed to all the parts of the earth and the bandwidth of radio frequencies, which connected most of the parts on the surface of the earth, is exhausted. The satellite phone systems include Low Earth Orbiting (LEO) satellites. LEO satellites are preferred to geo stationary satellites because the latter introduces delay. This delay introduced by geo stationary satellite can vary with the distance at which it is placed. The least delay is about 0.5 seconds and this is a major disadvantage of geo stationary satellites so we go in for LEO satellites that have become a part and parcel of the satellite phone systems.

The system of satellite phones include not a single LEO satellite, but a constellation of LEO satellites, this is done because the LEO satellites are placed close to the earth and so they revolve faster than the earth making them invisible at times. So when one satellite is moving out of the horizon, another LEO satellite comes up close by to receive the calls.

The technology implemented by the satellite phones depends on the type of service providers like GlobalStar systems and Iridium systems. Satellite phone systems also include the various techniques used for the transmission of data, be it audio or video signals.

Some companies like the Iridium uses time division multiple access scheme to increase the number of calls that can be attended. It has satellite-to-satellite connections as a part of the phone systems thus handsets work directly with the satellites. Another satellite phones system, the GlobalStar implements new digital technology called code division multiple access and satellites for attending the traffic of calls.

In this system, satellites are used only as relay stations that is, they receive and forward calls to the gateways on the earth and the call reaches the public switched telephone network. Regardless of the technology used, the main aim of the satellite phone systems and service providers is to keep their customers in contact wherever they go.

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