The Duffing-harmonic oscillator is a common model for nonlinear phenomena in science and engineering. In this paper, a new analytical technique has been presented to determine approximate periods of a strongly nonlinear Duffing-harmonic oscillator. Generally, a set of difficult nonlinear algebraic equations appear when harmonic balance method is im

In the present paper, a complicated strongly nonlinear oscillator with cubic and harmonic restoring force, has been analysed and solved completely by harmonic balance method (HBM). Investigating analytically such kinds of oscillator is very difficult task and cumbersome. In this study, the offered technique gives desired results and to avoid numeri

Moringa oleifera (M. oleifera) has been considered as medicinal plant and food substance since ancient times. Nowadays various therapeutic effects of M. oleifera such as antimicrobial, anticancer, anti-inflammatory, antidiabetic, and antioxidant effects have been successfully investigated. In this study, the main objective was to optimize M. oleife

In this article, an analytical technique has been developed to determine approximate solutions of nonlinear singular oscillator. Usually, a set of nonlinear algebraic equations is solved in analytical approximate method. However, analytical solutions of these algebraic equations are not always possible, especially in the case of a large oscillation

Pancreatic cancer is one of the deadliest cancers due to the fact that it does not exhibit symptoms in the early stages. Furthermore, when pancreatic cancer gets diagnosed, it is usually too late. Consequently, early diagnosis is highly essential. The dawn of proteomics has brought with it a glimpse of hope of uncovering biomarkers that can be indi

The ultra-wide band passive RFID system is receiving a great consideration for the researchers with the aim of substituting the conventional barcode system. The dimension of the chipless tag still rests as a big question that makes the use of tagging the object difficult as well as costly. Different backscattered signal with time delay can successf

Sodium morpholine-4-carbodithioate and four metal complexes were synthesized and characterized using various physico-chemical techniques. The ligand behaved as a uninegatively charged bidentate ligands upon complexation with metal ions with the general formula of Ma(SS)2 and Mb(SS)3, where Ma is Cu(II) and Ni(II) and Mb is Co(III) and Fe(III). All

This paper highlights the contributions of ordinary citizens to the development of a developing country – Bangladesh. The article discusses the contributions made by two ordinary citizens of Bangladesh, Begum Rokeya Sakhawat Hossain and Khondker Azizur Rahman Salim, toward building the society. It is argued in this paper that the participation of

We introduce an analytical technique to solve strongly nonlinear oscillators with cubic and harmonic restoring force by using harmonic balance method (HBM). A set of nonlinear algebraic equations is appeared when HBM is imposed. In this paper, a power series solutions of these nonlinear algebraic equations gives desired results and to avoid numeric

A resonator type chipless RFID tag comprised of two separate antennas, one transmission line with spiral resonators. The key element of a chipless RFID tag is its passive spiral microstrip resonator circuit which contains the data bits for the tag. To decrease the dimension of resonator in chipless tag is still challenging task. At present rectangu