Tihomir Čuljak
There are several ways to purify salt water or dirty water. Distillation processes are most commonly used, as well as osmosis processes in which water passes through semipermeable membranes. Distillat...
There are various types of seawater desalination devices for drinking water and plant irrigation. Most of these devices use a lot of energy to evaporate water and convert it into water vapor which is...
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...
One-wheeled trolleys, the wheelbarrow, are a small innovation that has significantly facilitated work in construction, but also in agriculture. These carts allowed one man to easily carry a load great...
Rabbits are bred for meat, but also as pets. Guinea pigs or hamsters are bred as pets. They all reproduce very quickly. The biggest problem is the stench that spreads when their feces are cleaned. Thi...
Drones are most commonly known as unmanned aerial vehicles. They appeared about fifty years ago as toys, and about thirty years ago they began to be used for air reconnaissance. In the last ten years,...
With the development of space technologies, it is increasingly likely that housing will soon have to be built for longer or shorter human stays on the moon. These colonizers will have to overcome a nu...
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...
Increasing the amount of waste of all kinds generated by industry and the population is increasingly seeking to develop technologies for processing waste into new raw materials. This so-called circula...
Boats are intended for navigation, but sometimes they must go out to dry. Smaller vessels are brought out to dry when they are repaired, while larger vessels are brought to the docks for water extract...
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...
In the last hundred years, all armies have been vigorously developing offensive weapons, but investing little in defense equipment. After the soldiers occupy some terrain, it is most important to quic...
A tricycle is a three-wheeled vehicle. It can't sidestep, and it starts off like a bicycle by pedaling with the rider's physical strength. The tricycle is most commonly used to carry one or tw...
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...
Debarkation boats are military vehicles that serve to transfer soldiers to an enemy territory. Disembarkation is carried out on the coasts of the sea or in the rivers, and in places not foreseen for s...
Bunkers are military objects that protect against enemy fire, grenades and explosions. Their purpose is to protect people and equipment in the bunker. In World War II, the Germans had small mobile bun...
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...
Hanging and sleeping nets appeared on sailing boats. In them a man can lie or sleep. Today, they are often used by hikers, hikers and soldiers while they are in the woods. They are particularly useful...
Cows, sheep, goats and other homemade animals must be kept from escaping and from attacking the beast. The most commonly used electric fences are used to prevent escape to foreign lands. Such escape f...
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Tihomir Čuljak
