Tihomir Čuljak
In war, trenches on the front line are usually dug by hand. Those located a few kilometers behind the front line are usually dug with large excavators and backhoes. The simplest tool for digging a tre...
For years, the great powers have been trying to gain an advantage in the race for the masters of outer space. China, India, the EU, Japan and even smaller countries joined the race started by the Sovi...
day2daytobacco
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In the last ten years, aerial drones have turned from toys and agricultural tools into very important military equipment. They are used for reconnaissance, but also for attacking land, sea and air tar...
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I have been doing earthworm farming as a hobby for 40 years. I experimented with different breeding technologies and fed them with different types of food. Earthworms are the best gardeners. They prod...
A snow blower is a machine that has a bucket at the front with rotating blades that throw snow towards the middle of the bucket. This crushed mass of snow is picked up by a spiral screw that lifts the...
There are several ways to generate energy from waves. Most of these devices float on the surface of the water at sea, lakes, or rivers, and energy is generated by moving up and down. Inside most of th...
Hipersonic rockets travel from 6 to ten times faster than sound. And anti-missile missiles consisting of so-called "missile shields" can shoot down enemy missiles traveling up to three times the speed...
Розмінування зазвичай відбувається тільки в мирний час. У бою їх прибирають тільки в тому випадку, якщо потрібно зробити прорив через мінне поле. Для швидкого розмінування полів у бою використовується...
When the vehicle encounters deep snow, the wheels sink into the snow, and the car cannot go any further. In order to be able to continue driving, chains have to be put on the wheels, but if the snow i...
With wind turbines installed in the deep sea, the problem is strong winds and big waves. Large waves can tilt the floating base, and the entire wind turbine tilts with it, which is bad for their safet...
The price of electricity produced using wind energy depends on the cost of building the turbine, on the lifetime of the turbine, on servicing costs, and on the amount of energy produced. The biggest c...
Solar cells produce energy in a quantity that mostly depends on the power of solar radiation, the length of the day, and the surface of the solar cells. The problem is that in cloudy weather the amoun...
Drones are a new, very cheap reconnaissance and offensive weapon that is difficult to defend against. Most often, they are so small that radars cannot notice them, and even people from the ground cann...
All over the world there are melioration canals that drain excess water from agricultural areas during periods of increased rainfall, or that serve to irrigate agricultural areas during the dry part o...
Solar cells are used to convert the energy of sunlight into electrical energy. This energy can be consumed immediately, it can be delivered to the electricity grid if it exists at the location, or it...
Pontoon bridges usually consist of floating parts over which small bridges are placed. They usually serve as temporary bridges, and are most often used in war. Such floating bridges must be portable a...
During the summer heat and dry weather, fires in open spaces are a frequent occurrence, especially in forests and thickets that are not cultivated and where there are no grazing livestock. And when dr...
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