Browsing by Author "Nahar, S."
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Item A comparative study of specific gene probes and standard bioassays to identify diarrhoeagenic Escherichia coli in paediatric patients with diarrhoea in Bangladesh(1992) Faruque, S.M.; Haider, K.; Albert, M.J.; Ahmad, Q.S.; Alam, A.N.; Nahar, S.; Tzipori, S.Item Amelioration of the floating solar panel with Fuzzy Logic(IEEE, 2021-02-01) Arnob, M. R. M.; Nahar, S.; Aziz, M.; Hasan, K.; Uddin, Mohammad NasirThis paper proposes an idea of the amelioration of solar panels with a fuzzy logic controller and their deployment on stagnant water (reservoir of hydro-electric damns). The involvement of a fuzzy logic controller improves the level of intelligence of the control system hence prioritizing between critical and non-critical loads which enables the utilization of the harnessed solar energy with greater service continuity. From the analysis, it was observed that 35% more energy is allocated for critical loads than the non-critical loads which satisfies a greater percentage of critical loads.Item An Empirical Analysis of 5.76 Tbit/s SDM-PDM-Nyquist superchannel WDM hybrid multiplexing technique for channel capacity enhancement((ACM) 2nd International Conference on Computing Advancements (ICCA '22), 2022-08-11) Arnob, R. M.; Nahar, S.; Uddin, Mohammad NasirThis article presents the feasibility study of 5.76 Tbits/s SDM-PDM-Nyquist superchannel WDM hybrid multiplexing technique for enhancing the channel capacity over a transmission distance up to 10 km using C-band frequencies in the multimodal domain. This system uses 48 independent channels carrying 48 bits streams of data using 8 C-band frequencies, 2 polarization states, and 3 LP modes. At a transmission distance of 10 km, satisfactory BER (log BER -9.35, faithful Q-factor 6.09, and extinction ratios 7.78 were observed with the minimum OSNR (46.5 dB) of the system, not going below the minimum OSNR (27.8) considering FEC limit. Each channel receives a satisfactory amount of power after 2 stage amplification process leading to a spectral efficiency of 137%.Item Characterisation of Plesiomonas shigelloides strains that share type-specific antigen with Shigella flexneri 6 and common group 1 antigen with Shigella flexneri spp. and Shigella dysenteriae 1(1993) Albert, M.J.; Ansaruzzaman, M.; Qadri, F.; Hossain, A.; Kibriya, A.K.M.G.; Haider, K.; Nahar, S.; Faruque, S.M.; Alam, A.N.Item Characterization of Aeromonas trota strains that cross-react with Vibrio cholerae O139 Bengal(1995-12) Albert, M.John; Ansaruzzaman, M.; Shimada, T.; Rahman, A.; Bhuiyan, N.A.; Nahar, S.; Qadri, F.; Islam, M.S.Item Clonal groups of enteropathogenic Escherichia coli isolated in case-control studies of diarrhoea in Bangladesh(2000-02) Ansaruzzaman, M.; Albert, M.J.; Nahar, S.; Byun, R.; Katouli, M.; Kühn, I.; Möllby, R.Item Clonal groups of enteropathogenic escherichia coli isolated in case-control studies on diarrhoea in Bangladesh(1998-June) Nahar, S.; Byun, R.; Katouli, M.; Kuhn, I.; Ansaruzzaman, M.; Albert, M. John; Mollby, R.Item Contact-haemolysin production by entero-invasive Escherichia coli and shigellae(1991) Haider, Khaleda; Albert, M.J.; Hossain, A.; Nahar, S.Item Cross-reaction between a strain of Vibrio mimicus and V. cholerae O139 Bengal(1999-09) Ansaruzzaman, M.; Shimada, T.; Bhuiyan, N.A.; Nahar, S.; Alam, K.; Islam, M.S.; Albert, M.J.Item Design of 32X20 Gbps Hybrid Technique of PDM-WDM and its performance analysis for channel capacity enhancement((ACM) 2nd International Conference on Computing Advancements (ICCA '22), 2022-08-11) Nahar, S.; Arnob, R. M.; Uddin, Mohammad NasirThis paper proposes a hybrid technique of Polarization Division Multiplexing and Wavelength Division Multiplexing with NRZ modulation. This design consists of 16 wavelengths with 32 individual dual-polarized channels having 100 GHz channel spacing up to 100 km transmission distance in a single-mode fiber. Each carried a 20 Gbit/s bit rate per channel and achieved 0.64 Tbit/s (16 wavelenghts×2 polarization state×20 Gbit/s), a net data rate with 21% spectral efficiency. The stability analysis of this technique was conducted by undertaking an FEC limit (Min Log BER= -3) calculation to get the minimum allowable OSNR (25.3 dB) in the transmission link.Item Design of high capacity 5.76 Tbits/s SDM-PDM-Nyquist superchannel WDM hybrid multiplexing in 3.1% Germania doped MMF(ORP-AIUB, 2022-12-31) Arnob, R. M.; Nahar, S.; Uddin, Mohammad NasirTo dispatch the goal about walking towards the 4th Industrial Revolution, one of the main key materials that require alterations and enhancements is data communication and transmission. To keep up with the augmented rise in demand for data, fiber-optics communication and networks commence a significant role in the transfer of data at high speeds. This article exemplifies the expediency analysis of 5.76 Tbits/s SDM-PDM-Nyquist superchannel WDM hybrid multiplexing technique over a multimodal transmission link up to 10 km using C-band carrier frequencies. This system is designed to carry 48 channels of data that can be produced using 8 C-band carrier frequencies, 2 polarization states, and 3 LP modes through 3.1% Germania doped over pure silica step-index multimode fiber. The system exhibits a satisfactory performance (log BER -9.35, faithful Q-factor 6.09, extinction ratios 7.78, minimum OSNR 46.5 dB) up to a distance of 10 km. Each channel receives a satisfactory amount of power after the dual-stage amplification process in the transmission medium with an ultra-high spectral efficiency of 137% and a high bandwidth-distance product of 385 MHz.kmItem Empirical analysis of polarization division multiplexing-dense wavelength division multiplexing hybrid multiplexing techniques for channel capacity enhancement(Institute of Advanced Engineering and Science (IAES) in collaboration with Intelektual Pustaka Media Utama (IPMU)., 2023-02) Nahar, S.; Arnob, R. M.; Uddin, Mohammad NasirThis paper exemplifies dense wavelength division multiplexing combined with polarization division multiplexing with C-band frequency range-based single-mode fiber. In the proposed link, 32 independent channels with 16 individual wavelengths are multiplexed with two different angles of polarization. Each carrying 130 Gbps dual-polarization data with 200 GHz channel spacing claiming a net transmission rate of 4.16 Tbits/s with spectral efficiency of 69% with 20% side-mode-suppression-ratio (SMSR)and optical signal to noise ratio (OSNR)40.7. The performance of the proposed techniques has been analyzed using optimized system parameters securing a minimum bit error rate (BER) 10-9 at a transmission distance up to 50 km.Item Enteroaggregative escherichia coli infections in Bangladeshi children: clinical and microbiological features(2007-10-31T03:22:54Z) Haider, Khaleda; Faruque, S.M.; Shahid, N.S.; Albert, M.J.; Nahar, S.; Malek, A.; Tzipori, S; Alam, A.N.Item Genetic analysis and phenotypic correlation of the plasmids universally present in strains of S. dysentriae type 1(1990-08-07) Haider, K.; Faruque, Shah M.; Nahar, S.; Tzipori, S.Item Molecular epidemiology and antimicrobial susceptibility of Neisseria gonorrhoeae isolated from commercial sex workers in Dhaka city[abstract](1998-06) Rahman, M.; Bhuiyan, B; Nahar, S.; Miah, R.A.; Islam, Nazrul; Rahman, M.; Albert, M.J.Item Pathogenesis of Providencia alcalifaciens-induced diarrhea(1992) Albert, M. John; Alam, K.; Ansaruzzaman, M.; Islam, M.M.; Rahman, A.S.M.H.; Haider, K.; Bhuiyan, N.A.; Nahar, S.; Ryan, N.; Montanaro, J.Item Phage specific for Vibrio cholerae O139 Bengal(1996-07) Albert, M. John; Bhuiyan, N.A.; Rahman, A.; Ghosh, A.N.; Hultenby, K.; Weintraub, A.; Nahar, S.; Kibriya, A.K.; Ansaruzzaman, M.; Shimada, T.Item Plasmid-associated resistance to pivmecillinam in Shigella flexneri and Shigella boydii[letter](1991) Haider, Khaleda; Albert, M.J.; Nahar, S.; Kibriya, A.K.M.J.Item Production of mucinase and neuraminidase and binding of Shigella to intestinal mucin(1993) Haider, Khaleda; Hossain, A.; Wanke, C.; Qadri, F.; Ali, S.; Nahar, S.Item Production of protease and haemolysin-possible markers of virulence in escherichia coli strains isolated from children with diarrhoea[abstract](1993) Halder, Khaleda; Faruque, S.M.; Hossain, A.; Baqui, A.H.; Albert, M.J.; Nahar, S.; Bhuiya, N.A.; Sack, B.