Design of e-shaped dielectric resonator antenna for ultra wideband (UWB) applications

Past few decades have witnessed huge advancements in the field of Antennas in terms of size, cost, efficiency, bandwidth, losses, power handling capacity and gain. Dielectric Resonator Antenna (DRA) is very latest and very efficient technology in the field of Antennas. It is very small in size, larger bandwidth, low losses, lower cost and very easy to integrate with existing technology. Here an E-shape DRA for Ultra-Wide Band (UWB) application is presented. It is very small in size. Antenna size is 24x24 mm2. We have used a substrate of size 24x24x1.6 mm3 with a 4.4 dielectric constant. We have used a ground plane of size 24x10 mm2. E-shape dielectric that has been used dielectric constant 2.1 and its height is 3 mm. Microstrip line is used as feeding line with dimensions 3x15 mm2. This antenna works best in frequency range of 6.7995-10.933 GHz. Its resonant frequency is 7.6818 GHz. VSWR parameter should be less than 2 within operating frequency range. This can be used in short range tracking, missile guidance, marine radar etc. as it comes mostly in X-band for UWB

Vibration Analysis of Rotor Shaft System using Journal Bearing

The present work deals with the development of finite element modelling for the analysis and study of vibration of rotor shaft system using journal bearing. The composite shaft is mounted an isotropic rigid disk and is supported by journal bearings at the ends those are modelled as springs and viscous dampers. The journal bearing for finite element model has been used based on the classical Reynolds equation for oil lubricated journal bearings. In this model the transverse shear deformation, rotor inertia and gyroscopic effects due to the lamination of composite layers have been incorporated. The equation of motion of composite rotor shaft-bearing system has been derived using the finite element method and the rotor shaft has also been modelled and analysed using Timoshenko beam theory. To verify the present model, the critical speeds of composite shaft system are compared with those available in the literature. Graphs were also plotted to illustrate the frequency and displacement response of composite rotor shaft system

Global burden of chronic respiratory diseases and risk factors, 1990–2019 : an update from the Global Burden of Disease Study 2019

Acknowledgments S Aljunid acknowledges the International Centre for Casemix and Clinical Coding, Faculty of Medicine, National University of Malaysia and Department of Community Medicine, School of Medicine, International Medical University, Malaysia for the approval and support to participate in this research project. A Cohen was supported by the Health Effects Institute, Boston, MA, USA. D Dereje acknowledges the research team. A Douiri acknowledges support by King's Health Partners / Guyâs and St Thomas Charity MLTC Challenge Fund (grant number EIC180702) and the NIHR Applied Research Collaboration (ARC) South London at King’s College Hospital NHS Foundation Trust. The views expressed are those of the authors and not necessarily those of the NIHR or the Department of Health and Social Care. T Ekundayo thanks the African-German Network of Excellence in Science, the Federal Ministry of Education and Research and the Alexander von Humboldt Foundation for financial support. R Erkhembayar is partially funded by the WHO. A Fatehizadeh acknowledges support from the Department of Environmental Health Engineering of Isfahan University of Medical Sciences, Isfahan, Iran. S Gahre acknowledges the Institute of Applied Health Sciences (IAHS), School of Medicine, Medical Sciences and Nutrition (SMMSN), University of Aberdeen for their institutional support for this work. V K Gupta acknowledges funding support from NHMRC (National Health and Medical Research) Australia. R Hartono thanks IHME who provide the GBD Data. C Herteliu is partially supported by a grant of the Romanian Ministry of Research Innovation and Digitalization, MCID, project number ID-585-CTR-42-PFE-2021. S Hussain was supported from Operational Programme Research, Development and Education Project, Postdoc2MUNI(No. CZ.02.2.69/0.0/0.0/18_053/0016952). BF Hwang was partially supported by China Medical University (CMU111-MF-55). M Jakovlievic declares that the serbian part of this GBD contribution was co-funded through Grant OI 175 014 of the Ministry of Education Technological Development and Science of the Republic of Serbia. T Joo acknowledges support from the National Research, Development and Innovation Office in Hungary (RRF-2.3.1-21-2022-00006, Data-Driven Health Division of National Laboratory for Health Security). N Joseph thanks the Department of Community Medicine, Kasturba Medical College, Mangalore, Manipal Academy of Higher Education, Manipal, India for encouraging research activities. H Kandel is supported by the Kornhauser Research Fellowship at The University of Sydney. M Khan is the recipient of College of Medicine and Health Sciences research grant, Grant numbers G00003634, G00003569 and UAEU Sustainable Development Goals Grant, Grant number 1976. K Krishan acknowledges Non-financial support from UGC Centre of Advanced Study, CAS II, Department of Anthropology, Panjab University, Chandigarh, India, outside the submitted work. K Latief acknowledges Taipei Medical University. MC Li was supported by the National Science and Technology Council in Taiwan (NSTC 111-2410-H-003-100-SSS). G Liu was supported by a CREATE scientific fellowship from Lung Foundation Australia. T H Malihi would like to acknowledge the support and encouragement from Deanship of Scientific Research at Jouf University, Saudi Arabia to actively Participate in this project. D Malta acknowledges CNPQ - Conselho Nacional de Desenvolvimento Cientifico e Tecnologico. E Mathews is supported by a Clinical and Public Health Early Career Fellowship (grant number IA/CPHE/17/1/503345) from the DBT India Alliance/Wellcome Trust†Department of Biotechnology, India Alliance. AF A Mentis would like to acknowledge Anna Gkika for her continuous moral support during this study. L Monasta was supported by the Italian Ministry of Health, through a contribution given to the Institute for Maternal and Child Health IRCCS Burlo Garofolo, Trieste, Italy. M Moniruzzaman was supported by The University of Queensland Postdoctoral Fellowship. J R Padubidri acknowledges Kasturba Medical College, Mangalore and Manipal Academy of Higher Education, Manipal for their constant support towards collaborative research. P Pedersini declares support and funding by the Italian Ministry of Health - Ricerca Corrente 2022. S Rahmani acknowledges the primary investigator for all their support. M Rodrigues acknowledges support from the Portuguese Council for Health and Environment. K E Rudd is supported by NIH/NIGMS grant 1K23GM141463-02. U Saeed acknowledges the International Center of Medical Sciences Research (ICMSR), Islamabad Pakistan. A M Samy acknowledges the support from Ain Shams University and the Egyptian Fulbright Mission Program F Thienemann is supported by the European Union (grant number RIA2017T-2004-StatinTB). X Xu is supported by Scientia Program at the University of New South Wales, Australia. This study was solely funded by the Bill & Melinda Gates Foundation. The funders of the study had no role in study design; collection, analysis, and interpretation of data; or writing of the report. The corresponding author had full access to the data and had responsibility for final submission of the manuscript. Funding Bill & Melinda Gates FoundationPeer reviewedPublisher PD

Effect of gibberellic acid on growth and flowering attributes of African marigold (Tagetes erecta) in inner terai of Nepal

A field experiment was conducted at Bangaun, Lamahi-3, Dang, Nepal to study the effect of GA3 on growth and flowering attributes of African marigold (Tagetes erecta) in Inner Terai of Nepal. The experiment consists of three replications and 8 treatments and laid out in a randomized complete block design- consisting of various concentrations of GA3 viz. 0ppm, 50ppm, 100ppm, 150ppm, 200ppm, 250ppm, 300ppm, and 350ppm. Kolkata local variety of African marigold was tested. The study revealed that among different concentrations of GA3, 300ppm showed the tallest plant height (72.93cm) and the highest basal diameter (1.49cm). Maximum numbers of primary branches (3.11) and the greatest plant spread (32.11cm) were obtained from 250ppm; similarly, maximum numbers of secondary branches (13.80) were recorded in 350ppm. In the case of floral parameters both 100ppm and 350ppm recorded earlier days to 50% flowering (44.00 days each), days for 100% flowering was recorded almost similar in every treatment that sticks around 54 and 55 days, maximum diameter (5.370cm) of flowers were obtained from 50ppm, the greatest fresh weight (6.180g) was recorded in 350ppm, 250ppm showed a maximum number of flower per plant (104.13), similarly, a longer duration of flowering (58 days) was recorded in 300ppm. Among all treatments, the 250ppm level of GA3 was found to be most suitable in terms of production perspective

The effect of exposure to biomass smoke on respiratory symptoms in adult rural and urban Nepalese populations

Peer reviewedPublisher PD

Review of recent innovations in portable child growth measurement devices for use in low- and middle-income countries

Acknowledgements: We would like to thank Ulster University colleagues, Professor John Anthony Byrne (principal investigator for the SAFEWATER project), Ms Vanessa Ross (SAFEWATER Project Manager) and Ms Anna Zmuda-Trzebiatowska (Global Grants Development Manager) for their guidance and support throughout the project. We are grateful to all the growth measurement device developers for sharing their product information with us. The authors accept full responsibility for this paper and have no competing interests. Funding The authors wish to acknowledge funding from the Department of Economy, The Global Challenges Research Fund (GCRF) Internal Pump Priming Call, in turn building upon a much larger GCRF, UK Research and Innovation grant for the SAFEWATER project (EPSRC Grant Reference EP/P032427/1).Peer reviewedPublisher PD

Simple one-pot fabrication of ultra-stable core-shell superparamagnetic nanoparticles for potential application in drug delivery

Ultrastable superparamagnetic core-shell nanoparticles of average diameter 80 nm have been fabricated via a simple one-pot method involving superparamagnetic iron oxide nanoparticles (SPIONs) core ([similar]50 nm in diameter) and lipid bilayer shell by high energy ultrasonication. The surface charges (zeta potentials) were measured to be between −15 mV and + 16 mV depending on the batch composition. Anticancer drug mitomycin C (MMC) was loaded into four different samples of variable surface charges in aqueous solution (pH = 6.8) and released in PBS buffer (pH = 7.2) at room temperature. The kinetics of drug loading and releasing data indicated that the stable lipid bilayer coated SPIONs (LBCSPIONs) of nearly neutral surface exhibited the highest loading (10.9 μg of MMC/mg of materials), whereas uncoated or partially coated SPIONs of positive zeta potential exhibited the lowest loading (2.8 and 3.5 μg MMC/mg of materials, respectively). The release behavior of MMC was observed to be highest (5.8 μg MMC/mg of materials) from materials of negative zeta potential compared to materials of near neutral surfaces (3.68 μg MMC/mg of materials). The plausible mechanism of MMC loading and releasing behavior has been explained based on the electrostatic interaction and diffusion through the lipid bilayers. To ensure biocompatibility, the interaction of the prepared SPIONs with human cervical cancer cell line (HeLa) was also investigated using an MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) assay and ROS (reactive oxygen species) production assay and the results confirmed the super-compatibility of LBCSPIONs