Military Academy

About: Military Academy is a based out in . It is known for research contribution in the topics: Population & Context (language use). The organization has 2478 authors who have published 3003 publications receiving 33188 citations.

Magnetoplastic effect in metals in strong pulsed magnetic fields

Abstract: The effect of strong pulsed magnetic fields with a magnetic induction amplitude from 5 to 40 T on the mechanical properties of Al, Zn, Sn, and Al–Zn foils has been studied. It has been found that the magnetoplastic effect exhibits a new feature, namely, a significant and, probably, irreversible increase in the microhardness of Al and Al–Zn foils after their single exposure to a unipolar pulsed magnetic field.

Sport classes as effective means for psychophysical health improvement of representatives of the security and defense sector.

Abstract: Objective The aim: Is to investigate the influence of sport classes on the psychophysical health of Ukrainian Armed Forces' servicemen. Patients and methods Materials and methods: The level of servicemen's health was estimated according to the professor Apanasenko's methodology based on the anthropometric and functional indicators. In the research there were 120 cadets aged 18 to 22 from Odesa Military Academy. Methods of research: analysis of scientific works, medical and biological methods, experiment, statistics analysis. Results Results: It was found out at the end of the experiment that the health level of the cadets who attended Crossfit classes is significantly higher than that of the cadets who studied according to the standard physical training program. The most profound effect was revealed on the functionality of the cardiovascular, respiratory and muscular systems, and the stabilization of body weight of cadets of experimental groups. Conclusion Conclusions:The results of the research show sufficiently high effectiveness of the Crossfit classes for the purpose of improving cadets' psychophysical health during studying. High psychophysical health level formed during the Crossfit training increases longevity and resistance of the body to unfavourable factors of professional activity, reduces the risk of professional diseases and improves the efficiency of the official duties performance.

An Experimental Study of the Tribological Characteristics of Engine and Gear Transmission Oils

Abstract: During the past few decades, special attention has been devoted to developing modern instruments and methods of monitoring the tribomechanical characteristics of technical systems. Today, various physical, chemical and tribological methods are used in tribomechanical systems diagnosis. Scientific experience in technical system exploitation and maintenance has shown that the most effective way to predict failure is based on parameters that are reliable indicators of wear. Analysis of oil samples, which contain particles due to the wear process, enables an evaluation of the tribology condition of the system in the early phases of its use. This paper deals with tribological tests that are part of the oil analysis and are used to access the condition of the system. Furthermore, the results of experimental research on the tribological characteristics of the oil sampled from engines and gear transmissions of the vehicles (Mercedes O 345, PUCH 300GD and PINZGAUER 710M) are shown. All of these road vehicle were in regular use by the Serbian armed forces. The performed research has revealed some significant changes in the tribological characteristics of oil for engine and gear transmission lubrication.. These changes directly depend on the condition of the entire engine and transmission elements, i.e. depend on their functional characteristics. The presented method of oil analysis should contribute to an early detection of failures due to friction and wear processes in vehicle engines and reduce the need for preventive maintenance.

Acetylation and Debromination of Sydnones Accelerated by Ultrasound

Abstract: In the presence of a catalytic amount of 60% perchloric acid, 4-acetyl-3-substituted sydnones were obtained more conveniently with greater yields by the sonochemical reaction of 3-substituted sydnone with acetic anhydride. Some 4-acetylsydnones which are difficult to synthesize by a known process were obtained in 17-68% yields. 4-Bromo-3-(bromoaryl)sydnones with activated zinc powder dispersed in methanol were debrominated regioselectively by ultrasound in high yields (60-96%). 3-(2′-/4′-Amino-3′,5′-dibromophenyl)sydnone is synthesized easily from 3-(2′/4′-aminophenyl)sydnone by reduction, bromination and debromination subsequently.