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Adhesion of PVD Coatings on Surface of Small Arm
Joska, Z. ; Rak, L. ; Daniel, Josef ; Horníček, J. ; Tříska, V. ; Nguyen, C.H.
This work deals with the possibility of increasing the utility properties of the functional part of the weapon by deposition of PVD coating. These coatings are widely known for their high hardness and abrasion resistance without affecting the anticorrosion properties. The experimental part evaluates the created duplex coating on the piston of the assault rifle Sa vz. 58. Duplex coating adhesion, surface morphology and coating thickness was evaluated on opto digital microscope Olympus DSX 500. The impact resistance of the coating was evaluated by dynamic impact test. The durability tests of the coatings were carried out during the training of students in the military training. The results showed the application of PVD coating significantly reduced piston head wear and increased user comfort in the form of shortening time of the cleaning and maintenance process after firing.
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Political developments in Vietnam from 1954 to the present
Nguyen, Cong Hung ; Volenec, Otakar (advisor) ; Kochan, Jan (referee)
The diploma thesis titled "Political developments in Vietnam from 1954 to the present" focuses on the political development of Vietnam after the war in Indochina until present days. It describes what led Ho Chi Minh to adopt communism, after what and by whom he was inspired and why communism has nowadays still a strong position in Vietnam. The main attention is devoted to the reforms of Doi Moi, that have lifted the country's economy. It outlines the positive and negative aspects following the introduction of these reforms.
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The role of China in South China Sea and East China Sea
Nguyen, Cong Hung ; Knotková, Vladimíra (advisor) ; Dubský, Zbyněk (referee)
China as it the coastal State is surrounded from the East by the Pacific Ocean, which are further divided into 4 different seas, which the East China Sea and South China Sea is China's most important from economic aspects, as in these seas there are great natural wealth such as seafood and minerals where China and many other countries in the region are dependent, because economic development is related to its dependence on raw materials. These materials have been found in the Senkaku Islands in the East China Sea and the Spratly islands in the South China Sea. But beside China other countries in the region also claim the disputed territories. The dispute between China and Japan over the Senkaku Islands, China has dispute with Vietnam, Philippines, Malaysia and Brunei over the Spratly Islands. These disputes stretch for several decades and among the players there were several direct and indirect conflicts. In the near future we cannot expect that there would be some resolution, given that China and others have in recent years arming heavily militarily, and so we can also assume that there might even be a direct conflict. It is therefore necessary to monitor this area, because here we can see conflicts of interests between the great powers like China and Japan, but also the U.S. are showing an interest in this area.
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