Vojnotehnicki glasnik / Military Technical Courier

409-416

Authors: Živaljević Milenko, Bečejski-Vujaklija Dragana

This work presents specific segments of an information system for maintaining combat aircraft. The existence of an information system for combat aircraft maintenance is a prerequisite for their high quality maintenance and achieving high efficiency and flight safety. The application of the maintenance methodology according to reliability, where aircraft maintenance is included, imposes the necessity for continuous following and estimation of the achieved reliability level of combat aircraft and effective control during the whole period of usage.

425-432

Authors: Čabarkapa Obrad

(not available in English) Primenom faktorske analize na polazne parametre koji najviše utiču na model dvofaznog strujanja u cevi automatske puške 7,62mm, dolazi se do sledećih zaključaka: analizirana su četiri parametra koji najviše utiču na izlazne UB karakteristike, kako samostalno tako i u kombinaciji sa ostalim parametrima. To su: jedinična brzina sagorevanja baruta, početna masa barutnog zrna, početna površina barutnog zrna i početna masa baruta potpunim faktorskim planom eksperimenta obuhvaćeni su maksimalni pritisak barutnih gasova i početna brzina projektila. Analogno ovoj analizi moguće je da se postupak faktorske analize primeni i na ostale karakteristike strujanja (gustina barutnih gasova, poroznost, energija barutnih gasova temperatura barutnih gasova, itd..); postupkom disperzivne i regresivne analize izvršeno je rangiranje odabranih parametara, formirani su regresivni polinomi, dobijene srednje vrednosti za maksimalni pritisak barutnih gasova i početnu brzinu projektila, kao i njihove dozvoljene granice odstupanja. Na osnovu dobijenih regresivnih koeficijenata i formiranih regresivnih polinoma moguća je dalja korekcija odabranih parametara radi usaglašavanja rezultata modela sa rezultatima eksperimenata; za pritisak barutnih gasova i brzinu projektila izvršena je faktorska analiza za određeni vremenski trenutak, odnosno trenutak postizanja maksimalnog pritiska i brzine projektila na ustima cevi (početna brzina); potpuni faktorski plan eksperimenta 24 primenjen je u ovom radu na teorijski model dvofaznog strujanja. Na isti način faktorska analiza se može primeniti i na eksperimenat [6], sto iziskuje znatno vise vremena i novčanih sredstava. Najbolje je da se realizuje kombinacija teorijskog modela i eksperimentalnih istraživanja.

447-453

Authors: Todorović Branislav, Stefanović Radiša, Arnautović Mladen

This paper points out the effects of mobile phone radiation on a human organism. The existing standards are based on electromagnetic field thermal effects on a human organism. The permissible values from the standards have been compared with the calculation results concerning field intensity measured field values and experimental data from literature. This served as a base for the determination of the antenna safety distance. Besides the thermal effect, there is interference as well as homeopathic effect whose influence has not been investigated yet. Some advice on using mobile phones are given in order to reduce harmful radiation.

467-474

Authors: Miladinović Vitomir

The pallet system is essential in supply, especially in logistic support of strategic units. In order to organize rationally the application of the pallet technology, it is necessary to create logistic transport chains from the producer to the final user. Possible pallet chains are presented here as well as their basic forming links. The evaluation methods concerning shain links are taken as criteria for the choice of an optimal pallet chain in operational planning in peacetime. The deterministic model for working out a number of pallets and necessary manipulation mechanization is presented for the chosen pallet chain.