Friday, December 29, 2006

Great Pyramid of Giza

It is located at the city of Giza, a necropolis of ancient Memphis, and today part of Greater Cairo, Egypt.

Contrary to the common belief, only the Great Pyramid of Khufu (Cheops), not all three Great Pyramids, is on top of the list of Wonders. The monument was built by the Egyptian pharaoh Khufu of the Fourth Dynasty around the year 2560 BC to serve as a tomb when he dies. The tradition of pyramid building started in Ancient Egypt as a sophistication of the idea of a mastaba or "platform" covering the royal tomb. Later, several stacked mastabas were used. Early pyramids, such as the Step Pyramid of King Zoser (Djoser) at Saqqara by the famous Egyptian architect, Imhotep, illustrate this connection.

The great pyramid is believed to have been built over a 20 year period. The site was first prepared, and blocks of stone were transported and placed. An outer casing (which disappeared over the years) was then used to smooth the surface. Although it is not known how the blocks were put in place, several theories have been proposed. One theory involves the construction of a straight or spiral ramp that was raised as the construction proceeded. This ramp, coated with mud and water, eased the displacement of the blocks which were pushed (or pulled) into place. A second theory suggests that the blocks were placed using long levers with a short angled foot.

Thursday, December 14, 2006

Home Decorations

A doll is a model of a human, a humanoid, an animal or a fictional character, usually made of cloth or plastic. Sometimes, intended as keepsakes or collections for older children and adults, it could be made in wood, porcelain, bisque, celluloid or wax. Some dolls are intended as toys for children, usually girls, to play with Angels Dolls. Others are for decoration or have some cultural significance, possibly for use in some ceremony or ritual, or as a physical representation of a deity. It is mainly used for home decorations. Archaeological evidence places dolls as foremost candidate for oldest known toy, having been found in Egyptian tombs, which date to as early as 2000 BC.

The model is often a miniature, but a baby doll may be of true size. A large model of hard material is called a statue. A doll or animal model of soft material is also called a plush toy or plushier. Tabletop Fountains is used for decorations. Our bathroom cabinets will enhance the perfect set bathroom of yours. Place all the necessary items neat and ordered in the cabinet and enjoy the perfectly set bathroom. The cabinets come in different colors and designs, also with packs of soaps and oil.

Wednesday, December 06, 2006

Reverse Osmosis

Common use for Reverse osmosis is in purifying water where it produces water, which is in demand at all, places. One of the finest filtration under Reverse Osmosis is Hyper Filtration, where the removals of particles are as small as ions. In this Process, water gets purified and the various salts and other impurities are removed to improve the Properties of fluid, its taste as well as color.

Reverse osmosis occurs when the water is moved across the membrane against the concentration gradient, from lower concentration to higher concentration. It thus purifies water by ejecting out fluids, inorganic chemicals such as nitrates, calcium, and magnesium, other ions and contaminants.

It uses a semi-permeable membrane, allowing the fluid that is being purified to pass through it. Most of the reverse osmosis technology procedures undergoes a cross flow Process to allow the membrane to clean itself periodically. As some of the fluid gets rested in downstream, continuous cross-flow process helps or sweeps out the rejected species away from the membrane.