Military Academy

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

Dual-band microstrip antenna using capacitive loading

Abstract: A novel technique for obtaining a single-layer single-feed dual-band microstrip antenna loaded with narrow slots and chip capacitors is proposed and demonstrated. By embedding a pair of slots of proper lengths close to the radiating edges, the rectangular patch has been shown to realise dual-band broadside radiation. The range of the frequency ratio (FR) can be extended to 1.25 by using chip capacitor loading across the narrow slots to produce further capacitive loads. Simple semi-empirical formulas for the two operating frequencies have also been obtained. Dual circular polarisation (CP) radiation for a global positioning satellite (GPS) application using four slots and four chip capacitors on a square patch is also demonstrated. Details of the antenna design and experimental results are presented.

The Strength of Bolted and Bonded Single-Lapped Composite Joints in Tension

Abstract: This work is primarily concerned with a failure analysis of single-lapped bolted and bonded mixed-composite joints, representing practical situations, both in terms of experimental data and theoretical appreciation. Two kinds of stacking sequences in adherends are tested: quasi-isotropic and cross-ply. The adhesives include thermal-setting and thermal-plastic types. The bolts used to clamp the bonded joints are made of 304 stainless steel, whilst the rivets are of NAS 1919 C05 according to National Aerospace Standards. The important invented techniques in making riveted and bolted joints and measuring their respective clamping pressure are disclosed, and the main contribution of systematic experimental data in contrast with numerical prediction is highlighted as follows.The bolting arrangements can be divided into one (1 x 1), three (1 x 3, 3 x 1), six (2 x 3) and nine (3 x 3) configurations. The empirical results indicate that the joint of six (2 x 3) bolts possess the highest strength, nine (3 x 3) bolt...

The relationship between insurance and economic growth: evidence from the European Union countries

Abstract: This paper has examined the relationships between insurance and economic growth across the European Union countries which belong to the European Insurance Federation. Using annual data over the per...