Tihomir Čuljak
Transport bags are used to carry a large amount of equipment, clothing or other material. They are used by travelers, hikers, and soldiers. Special military units sometimes carry up to 70 kilograms of...
Shepherds are people who have to go where sheep, goats, cattle and other animals they keep go. In this movement, they must spend days outside populated areas, moving through bushes, forests and karst....
The sails on today's sailing boats most often have a triangular shape. The surface of a triangular sail is twice smaller than a square sail of the same height and width. By placing square sails on...
Sailboats are vessels or boats powered by power wind. In the past, they were the most common type of vessel, while today they are used most on recreational yachts and sports vessels, but more recently...
Seafarers have long since begun to use lifejackets to given to crew in the event of a ship crash. Initially, these were rubber belts, and later, with the development of plastics, they would become muc...
Many innovators have been trying to make a car powered by photocells glued to the roof of a car. The problem is low power, and therefore low speed. For this car to be usable, photocells must first rec...
In recent years, in many countries, they did raised gardens have emerged. In some greenhouses, vegetables are grown on more floors. In Israel, some farmers breed strawberries in a meter raised with la...
Ships have been using wind power for hundreds of years. After the invention of the steam engine, and later the internal combustion engine, wind power was used only for sport and family sailboats. Deve...
I looked at a show about building a pyramid in ancient Egypt and in Latin America. Archaeologists do not know how they are then people carried large stone blocks hundreds of miles away without mo...
Many tourists visit ancient abandoned cities every day in Latin America. They remain caught up when they see the walls built with large stone blocks. They are so arranged that no jewels can be placed...
Obelisk is a large monolithic stone block with four pages narrowing to the top. At the top is a small pyramid covered with electrodes, which is a mixture of gold and silver. The obelis were placed in...
Compressed air is pressure-pressurized atmospheric air, which is used as a means for transferring and storing energy. When the air is pressed, its temperature rises. This temperature must what be remo...
Many people in the world occasionally made the boats on which they set their sailing gardens. Such gardens are usually very expensive. Some primitive peoples living in swampy areas have also made floa...
Californian worms have been bred for decades around the globe. They are used for the processing of manures, and is product high quality humus. Small breeders worms products for fishing, while big bree...
Many people made a floating raft of plastic bottles. Empty plastic bottles are placed in nylon sacks, or nets. Wooden pallets are placed on this floating structure. This raft has a large load capacity...
In many parts of the world, people have built houses from the country. Fat earthy walls are excellent heat insulation, in summer they are comfortable, and in winter warm. Energy consumption for heatin...
Extensive breeding of ducks and geese on fishponds requires little investment. The duck and the geese are kept on the water during the day, while closing at night in the canopies. Canopies can be on t...
When a boat moves through the water it has to overcome a certain water resistance. Part of the resistance is formed on the bow where the boat penetrates through the water. The second part of the resis...
The first cars on compressed air used in the 19th century, mostly in mines. Compressed air also powered trams and locomotives. Various pneumatic tools are also started today with compressed air. Compr...
Mobile toilets that are quick and easy to place in places where there is no sewerage are increasingly used. Most often they are placed at excursions, big concerts, parking lots and similar places. The...
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Tihomir Čuljak
