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Raza, Imran
- Optical Wireless Channel Characterization for Indoor Visible Light Communications
Abstract Views :222 |
PDF Views:0
Authors
Imran Raza
1,
Sidra Jabeen
1,
Fozia Shabbir
1,
Mashood Abbasi
1,
Saqib Chaudhry
2,
Syed Asad Hussain
1
Affiliations
1 Communication and Networks Research Centre Department of Computer Science COMSATS Institute of Information Technology, Lahore, PK
2 Microwave and Communication Systems (MACS), School of Electrical and Electronic Engineering, The University of Manchester, Manchester M13 9PL, GB
1 Communication and Networks Research Centre Department of Computer Science COMSATS Institute of Information Technology, Lahore, PK
2 Microwave and Communication Systems (MACS), School of Electrical and Electronic Engineering, The University of Manchester, Manchester M13 9PL, GB
Source
Indian Journal of Science and Technology, Vol 8, No 22 (2015), Pagination:Abstract
The visible Light Communications (VLC) has gained a lot of interest for indoor communications resulting in several research challenges. The use of Light Emitting Diodes (LEDs) as light source poses many modulation issues for Line Of Sight (LOS) Optical Wireless Channel (OWC). This paper investigates the line of sight optical wireless channel characterization for visible light communications designing a realistic indoor environment adding path loss along with Additive White Gaussian Noise (AWGN) to the channel. A comprehensive mathematical model is derived and simulated to investigate the performance of the proposed system considering the effect of different parameters such as Eb/No, Signal to Noise Ratio (SNR), distance between transmitter and receiver, signal power on the Bit Error Rate (BER), propagation delay, and spectral efficiency. The propose indoor OWC for VLC enhances the transmission range from 4 meters to 6 meters having optimal quality of transmission in a channel representing real indoor environment.
Keywords
Visible Light Communications (VLC); Optical Wireless Chanel (OWC); Line of Sight (LoS) and AWGNFull Text
- Synthesis of Zinc Oxide Nano particles from Moringa Tree Leaves by Green Method and also check its Antibacterial Activity against Gram Positive and Gram Negative Bacteria
Abstract Views :68 |
PDF Views:0
Authors
Saira Sehar
1,
Mohsin Sher Ali Khan
2,
Amiza
3,
Touqir Hussain
4,
M. Zahid
5,
Moazina Mobeen
6,
Imran Raza
7,
Minnatullah
7
Affiliations
1 Department of Chemistry, Minhaj University, Lahore, PK
2 School of Chemical Engineering Dailan University of Technology, China. 3Department of Chemistry, UMT Lahore, PK
3 Department of Chemistry, UMT Lahore, PK
4 Department of Chemistry, University of Agriculture Faisalabad, PK
5 School of Hefei National Laboratory for Physical Sciences at Microscale University of Science and Technology of China, CN
6 Department of Physics, Comsats University Islamabad, PK
7 Department of Chemistry, GCUF, PK
1 Department of Chemistry, Minhaj University, Lahore, PK
2 School of Chemical Engineering Dailan University of Technology, China. 3Department of Chemistry, UMT Lahore, PK
3 Department of Chemistry, UMT Lahore, PK
4 Department of Chemistry, University of Agriculture Faisalabad, PK
5 School of Hefei National Laboratory for Physical Sciences at Microscale University of Science and Technology of China, CN
6 Department of Physics, Comsats University Islamabad, PK
7 Department of Chemistry, GCUF, PK
Source
Asian Journal of Pharmacy and Technology, Vol 12, No 3 (2022), Pagination: 213-217Abstract
The extracted material from Moringa oleifera is used for synthesis of the ZnO nanoparticles. The extracted material from plants is used as stabilizing and reducing agent. Plant extracts are also used for the formation of nanoparticles this is called green synthesis method which decreases the formation of unsafe materials. With the help of various Analytical techniques for example scanning electron microscopy (SEM), Infrared (IR) Spectroscopy and UV (Ultra violet) Spectroscopy, the manufactured ZnO nanoparticles are distinguished. The range of the size of ZnO nanoparticles is from 48nm by SEM and XRD. The peak of ZnO is observed at 500 cm-1 by FTIR. Ultraviolet visible spectroscopy shows the spectrum of ZnO at 290-315nm range. Moringa oleifera mediated ZnO revealed high activity against gram positive and gram negative bacteria. Smaller sized Nanoparticles shows excellent antimicrobial activity.Keywords
Nanoparticles, Moringa Oleifera, SEM and Antimicrobial Exercise.
References
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- M. A. Taiwade, Der Pharma Chemic. 5(5) (2013) 301-306.
- S. Karthik, P. Siva, K.S. Balu, R. Suriyaprabha, V. Rajendran, M. Maaza, Acalypha indica–mediated green synthesis of ZnO nanostructures under differential thermal treatment: effect on textile coating, hydrophobicity, UV resistance, and antibacterial activity, Adv. Powder Technol. 28 (2017) 3184–3194.
- H. Namazi, M. Hasani, M. Yadollahi, Antibacterial oxidized starch/ZnO nanocomposite hydrogel: synthesis and evaluation of its swelling behaviours in various pHs and salt solutions, Int. J. Biol. Macromol. (2018)
- P.J.P. Espitia, N. de F.F. Soares, J.S. dos R. Coimbra, N.J. de Andrade, R.S. Cruz, E.A. A. Medeiros, Zinc oxide nanoparticles: synthesis, antimicrobial activity and food packaging applications, Food Bioprocess Technol. 5 (2012) 1447–1464.
- B. Yang, A. Kumar, H. Zhang, P. Feng, R.S. Katiyar, Z. Wang, Growth of ZnO nanostructures on metallic and semiconducting substrates by pulsed laser deposition technique, J. Phys. D. Appl. Phys. 42 (2009)
- N. Matinise, X.G. Fuku, K. Kaviyarasu, N. Mayedwa, M. Maaza, Applied surface science ZnO nanoparticles via Moringa oleifera green synthesis: physical properties; mechanism of formation, Appl. Surf. Sci. 406 (2017) 339–347
- A. Diallo, B.D. Ngom, E. Park, M. Maaza, Green synthesis of ZnO nanoparticles by Aspalathus linearis: structural; optical properties, J. Alloys Compd. 646 (2015) 425–430,
- F.T. Thema, E. Manikandan, M.S. Dhlamini, M. Maaza, Green synthesis of ZnO nanoparticles via Agathosma betulina natural extract, Mater. Lett. 161 (2015) 124–127,
- A.T. Khalil, M. Ovais, I. Ullah, M. Ali, Z.K. Shinwari, S. Khamlich, M. Maaza, Sageretia thea (Osbeck.) mediated synthesis of zinc oxide nanoparticles and its biological applications, Nanomedicine (2017).
- A. Happy, M. Soumya, S.V. Kumar, S. Rajeshkumar, R.D. Sheba, T. Lakshmi, V. D. Nallaswamy, Phyto-assisted synthesis of zinc oxide nanoparticles using Cassia alata and its antibacterial activity against Escherichia coli, Biochem. Biophys. Reports 17 (2019) 208–211.