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A Miniaturized Triple-Band Implantable Antenna System for Bio-Telemetry Applications
Zada, Muhammad,Yoo, Hyoungsuk IEEE 2018 IEEE transactions on antennas and propagation Vol.66 No.12
<P>This communication presents a miniaturized triple band implantable antenna system for multiple biotelemetry applications, which operates at the industrial, scientific, and medical (ISM) band (902–928 MHz and 2400–2483.5 MHz) and the midfield band (1824–1980 MHz). These bands are intended for the function of data telemetry, wireless power transfer, and power saving. The recommended antenna system is comprised of two implantable devices, a capsule type for deep tissue implantation and a flat type for skin implantation. The volume of these devices is 647 mm<SUP>3</SUP> and 425.6 mm<SUP>3</SUP>, respectively. The compact size of the proposed antenna system is 21 mm<SUP>3</SUP> ( <TEX>$7\,\,\text {mm} \times 6 \,\,\text {mm} \times 0.5$</TEX> mm), which is the smallest size yet presented. The miniaturization is achieved by meandering the shape of the radiating patch, adding an open-end ground slot, and introducing a shorting pin between ground plane and radiating patch. In the proposed antenna, simulated bandwidth is 8.7% and 7.3% at the ISM bands and 8.2% at the midfield band, and the measured bandwidth in a saline solution is 14.7% and 24.8% at the ISM bands and 13.1% at the midfield band. Finally, a link budget is calculated at different data rates to specify a range for data telemetry.</P>
Siddique, Muhammad,Iqbal, Azmat,Rahman, Amin Ur,Azam, Sikander,Zada, Zeshan,Talat, Nazia Korean Nuclear Society 2021 Nuclear Engineering and Technology Vol.53 No.2
Thorium compounds have attracted immense scientific and technological attention with regard to both fundamental and practical implications, owing to unique chemical and physical properties like high melting point, high density and thermal conductivity. Hereby, we investigate the mechanical and thermodynamic stability and report on the structural, electronic and magnetic properties of new silicon-doped cubic ternary thorium phosphides ThSi<sub>x</sub>P<sub>1-x</sub> (x = 0, 0.25, 0.5, 0.75 and 1). The first-principles density functional theory procedure was adopted within full-potential linearized augmented plane wave (FP-LAPW) method. The exchange and correlation potential terms were treated within Generalized-Gradient-Approximation functional modified by Perdew-Burke-Ernzerrhof parameterizations. The proposed compounds showed mechanical and thermodynamic stable structure and hence can be synthesized experimentally. The calculated lattice parameters, bulk modulus, total energy, density of states, electronic band structure and spin magnetic moments of the compounds revealed considerable correlation to the Si substitution for P and the relative Si/P doping concentration. The electronic and magnetic properties of the doped compounds rendered them non-magnetic but metallic in nature. The main orbital contribution to the Fermi level arises from the hybridization of Th(6d+5f) and (Si+P)3p states. Reported results may have potential implications with regard to both fundamental point of view and technological prospects such as fuel materials for clean nuclear energy.
Lee, Ki-Won,Rahman, Md. Atikur,Zada, Muhammad,Lee, Dong-Gi,Kim, Ki-Yong,Hwang, Tae Young,Ji, Hee Jung,Lee, Sang-Hoon The Korean Society of Grassland and Forage Science 2015 한국초지조사료학회지 Vol.35 No.3
The present research investigated copper and cadmium stress-induced differentially expressed genes (DEGs) using annealing control primers (ACP) with the differential display reverse transcription polymerase chain reaction technique in alfalfa (Medicago sativa L. cv. Vernal) leaves. Alfalfa leaves were subjected to $250{\mu}M$ of copper and cadmium treatment for a period of 6 h. A total of 120 ACPs was used. During copper and cadmium treatment, 6 DEGs were found to be up or down regulated. During copper stress treatment, 1 DEG was up-regulated, and 3 novel genes were discovered. Similarly, during cadmium stress treatment, 1 DEG was up-regulated and 5 novel genes were identified. Among all 6 DEGs, DEG-4 was identified as the gene for trans-2,3-enoyl-CoA reductase, DEG-5 was identified as the gene for senescence-associated protein DIN1 and DEG-6 was identified for caffeic acid O-methyltransferase. All the up-regulated genes may play a role in copper and cadmium stress tolerance in alfalfa.