Hybrid Plasmonic Waveguide Fed Broadband Nano-antenna for Nanophotonic Applications

In this paper, we propose a novel hybrid plasmonic waveguide fed broadband optical patch nano-antenna for nanophotonic applications. Through full wave electromagnetic simulation, we demonstrated our proposed antenna to radiate and receive signal at all optical communication windows (e.g. $\lambda$ = 850nm, 1310nm & 1550nm) with around 86% bandwidth within the operational domain. Moreover numerical results demonstrate that the proposed nano-antenna has directional radiation pattern with satisfactory gain over all three communication bands. Additionally, we evaluated the antenna performances with two different array arrangements (e.g. one dimensional and square array). The proposed broadband antenna can be used for prominent nanophotonic applications such as optical wireless communication in inter and intra-chip devices, optical sensing and optical energy harvesting etc.Comment: 4 Page, 7 figure

Transverse Wave Propagation in Relativistic Two-fluid Plasmas around Schwarzschild-anti-de Sitter Black Hole

The 3+1 formalism of Thorne and Macdonald has been used to derive the linear two-fluid equations for transverse waves in the plasma closed to the Schwarzschild-anti-de Sitter (SAdS) black hole. We reformulate the relativistic two-fluid equations to take account of gravitational effects due to the event horizon and negative cosmological constant and describe the set of simultaneous linear equations for the perturbations. Using a local approximation we investigate the one-dimensional radial propagation of Alfven and high frequency electromagnetic waves. We derive the dispersion relation for these waves and solve it for the wave number k numerically.Comment: 11 pages. arXiv admin note: substantial text overlap with arXiv:1008.4838, arXiv:0807.4595, arXiv:0902.3766, arXiv:0806.2740, arXiv:0904.337

Efficiency of subwavelength imaging with multisegment nanolens

We analyzed capabilities and functionalities of a multisegment superlens recently suggested for long-distance transport of color images with subwavelength resolution. We studied the performance of three- and six-segment nanolens structures by analyzing numerically both transmission and reflection coefficients and by employing the full-wave simulations for a particular source arrangement. Our results suggest that such multisegment structures offer limited subwavelength imaging performance with a relatively narrow frequency band

Physical map location of the peptide methionine sulfoxide reductase gene on the Escherichia coli chromosome

This is the publisher's version, also available electronically from "http://jb.asm.org".No abstract available

A NEW PRENYLATED FLAVANONE FROM THE ARIAL PART OF <i>Orthosiphon stamineus</i>

Phytochemical investigations on the chloroform extract of the arial part of Orthosiphon stamineus resulted in isolation of one new prenylated compound 5,7-dimethoxy-3,4′-dihydroxy-3′,8-di-C-prenylflavanone together with four known flavonoids compounds, sinensetin, eupatorin, 5,6,7,4¢-tetramethoxyflavone and 3-hydroxy-5,6,7,4¢-tetramethoxyflavone. The structures were deduced on basis of different analytical methods such as UV, IR, 1H-NMR, 13C-NMR, DEPT, COSY, HMBQ and GC-MS. The prenylated compound is reported for the first time from this plant.   Keywords: Orthosiphon stamineus, prenylated flavanone, flavonoid

Soft skills practiced by managers for employee job performance in Ready Made Garments (RMG) sector of Bangladesh

Soft skills are essential tools in maintaining employment relations as well as achieving high job performance. The purpose of this study is to explore the contribution of soft skills practiced by manager towards employee job performance specifically at RMG sector in Bangladesh. Data have been collected through two Focus Group Discussions (FGDs) and five in-depth interviews. Thematic analysis yielded four most commonly practiced soft skills in RMG which are communication, leadership, team work and critical thinking. This study reveals that there is a direct positive relationship between soft skills practiced by managers and employees’ job performance. This study has three significant contributions. Firstly, this study is one of the very few studies on soft skills practice set on production based industry from non-western context. Secondly, this study facilitates future comparative studies on service sector as well as on crosscultural perspective. The findings of this study has created further opportunity to conduct study on other production based industries available in Bangladesh and around the globe. Thirdly, the HR practitioners in Bangladesh specifically in production based industry will be more concerned from now about the practice of soft skills