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Search Results: 1 - 10 of 1611 matches for " Shamim Hossain "
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Web Service Based Software Implemented Fault Injection
Mohammod Shamim Hossain
Information Technology Journal , 2006,
Abstract: Toady`s information society, offering fully automated dependable software for critical online and offline system is a challenging task. There is a great need for automated Software Implemented Fault Injection (SWIFI) tools to assist programmers and system designers with performance and dependability evaluation. This study presents a review of related research on Software Implemented Fault Injection. Based on some of the review, a web service based Software Implemented Fault Injection (SWIFI) framework is proposed. The proposed framework will support portability and leverage extended facilities of existing SWIFI tools.
A Synoptic Review of Reconciliation Algorithm for Mobile Databases
Mohammod Shamim Hossain,M. Anwar Hossain
Information Technology Journal , 2006,
Abstract: The explosive growth of mobile communications has opened the possibility of extending traditional database management functionality to the mobile computing environment. Databases running in the mobile environment have the ability to allow optimistic replication and local updates on the disconnection clients. Reconciliation of conflicting updates is a fundamental problem in mobile systems. This study presents a multi version reconciliation algorithm to resolve this issue and discusses the benefits and limitations of such scheme. One of the benefits to avoid cascading abort has been appreciated while some limitations in terms of symmetric reconciliation and concurrence control have been criticized and explored further.
Quality of Service and Differentiated Service in Cellular Networks
Mohammod Shamim Hossain,M. Anwar Hossain
Journal of Applied Sciences , 2005,
Abstract: The recent QoS model of the Differentiated Services (DiffServ) approach including premium service, assured service and best effort service in intended for usage in wire line networks and Internet. However, cellular networks are popular and becoming more popular within the years to come. So there is a need for surveying the recent research work on QoS model for DiffServ in cellular networks. One of the QoS aware crucial problems is handover problem. Another problem of cellular network includes low channel capacity i.e. low bandwidth and classification of packets within a flow.
Effect of Biochar Application on Soil Carbon Fluxes from Sequential Dry and Wet Cultivation Systems  [PDF]
Mahmudul Islam Piash, Md. Faruque Hossain, Ihuoma N. Anyanwu, Shamim Al Mamun, Zakia Parveen
American Journal of Climate Change (AJCC) , 2018, DOI: 10.4236/ajcc.2018.71005
Abstract: Application of biochar has been highly credited for its potential to sequester carbon and GHG mitigation from tropical agro-ecosystems. However, experiments show inconsistent results depending on soil and biochar type, cultivation system, climatic condition and the type of evolved GHGs. This study emphasized on the effect of biochar on carbon emission trends from a sequential dry and wet cultivation system of Bangladesh. An incubation study was conducted with two contrasting soils and eight different treatments viz. control, only fertilizer, three different biochars (10 t·ha-1) with and without recommended fertilizer dose. Results revealed the fact that, emission of carbon was substantially higher from Sara soil than Kalma soil. Biochar treatments did not have any easing effect on CO2 emission at field condition; rather, increased in most of the cases. However, emission was significantly (P < 0.05) suppressed at submerged condition by biochar application. Non-fertilized water hyacinth biochar was most effective in this regard. In general, fertilizer application caused higher emission of CO2. Biochar application was ineffective to control CH4 and CO release to atmosphere and submergence further intensified their emission significantly. The overall results indicate that applied biochars have negligible effect on carbon emission except for reducing CO2 from submerged soils.
Quantitative Examination of Aerobic Bacteria and Fungi in Locally Available Antacid Suspension and Possible Contamination by Specified Bacteria
Mahboob Hossain,Shamim Ara,Mohammed Zakiur Rahman
Pakistan Journal of Biological Sciences , 2004,
Abstract: The microbiological status of liquid antacid suspension of 20 pharmaceutical industries of Bangladesh were studied. Aerobic viable microbial count of 27 (75%) out of 36 samples studied were found to exceed the USP limit. Viable microbial count varied between less than 102 CFU mL-1 and greater than 106 CFU mL-1. In 11 (30%) samples of 8 companies the total aerobic microbial count was more than 103 CFU mL-1. Microbial counts of two large reputed pharmaceutical companies were 1000 fold higher than those of some small companies. None of the samples contained Escherichia coli and Salmonella spp. Out of 36 samples 1 (2.5%) of the 2 samples of one company having different manufacturing date contained Pseudomonas aeruginosa and both samples (5%) having different manufacturing date of another large company contained Staphylococcus aureus. No significant correlation between pH deviation and contamination by microbes was observed.
Chlorine Level as a Predictive Factor for Oxaliplatin-induced Peripheral Neuropathy
Shamim Hossain,Shahedur Rahman,Ashrafuzzaman Zahid
Journal of Medical Sciences , 2011,
Abstract: Peripheral neuropathy is a major adverse event associated with oxaliplatin-based chemotherapy and is a major dose-limiting adverse event in clinical practice. However, some patients treated with oxaliplatin may show no or minimal peripheral neuropathy. These differences are still poorly understood. This study was carried out as a retrospective analysis of 77 patients data that had been treated with oxaliplatin-based regimens at the South Dhaka Medical Center between January 2005 and June 2010. Among them 51 patients data were selected and factor analysis was performed. The serum Chlorine (Cl) level at baseline was significantly higher in patients with a high frequency of peripheral neuropathy (106; range 104-107 vs. 104; range 101-104 mEq L-1, p = 0.02). Principal component analysis showed the variables Cl, body mass index, status of liver metastasis and status of lymph node metastasis were related to the incidence of peripheral neuropathy. Discriminant analysis showed the model had predicted 72.5% of peripheral neuropathy. An understanding of the patients characteristics could be useful for preventing or predicting oxaliplatin-induced peripheral neuropathy.
Managing and Analysing Software Product Line Requirements
Shamim Ripon,Sk. Jahir Hossain,Touhid Bhuiyan
Computer Science , 2013, DOI: 10.5121/ijsea.2013.4505
Abstract: Modelling software product line (SPL) features plays a crucial role to a successful development of SPL. Feature diagram is one of the widely used notations to model SPL variants. However, there is a lack of precisely defined formal notations for representing and verifying such models. This paper presents an approach that we adopt to model SPL variants by using UML and subsequently verify them by using first-order logic. UML provides an overall modelling view of the system. First-order logic provides a precise and rigorous interpretation of the feature diagrams. We model variants and their dependencies by using propositional connectives and build logical expressions. These expressions are then validated by the Alloy verification tool. The analysis and verification process is illustrated by using Computer Aided Dispatch (CAD) system.
Energy Detection Performance of Spectrum Sensing in Cognitive Radio
Md. Shamim Hossain,Md. Ibrahim Abdullah,Mohammad Alamgir Hossain
International Journal of Information Technology and Computer Science , 2012,
Abstract: Spectrum sensing is a challenging task for cognitive radio. Energy detection is one of the popular spectrum sensing technique for cognitive radio. In this paper we analyze the performance of energy detection technique to detect primary user (PU). Simulation results show that the probability of detection increases significantly when signal to noise ratio increases. It is also observed that the detection probability decreases when the bandwidth factor increases.
Hard Combination Data Fusion for Cooperative Spectrum Sensing in Cognitive Radio
Md. Shamim Hossain,Md. Ibrahim Abdullah,Mohammad Alamgir Hossain
International Journal of Electrical and Computer Engineering , 2012, DOI: 10.11591/ijece.v2i6.1814
Abstract: This paper presents a study of hard combination data fusion for cooperative spectrum sensing in Cognitive Radio (CR). We evaluated the performance of cooperative spectrum sensing with the hard combination OR, AND and MAJORITY rules. Energy detection technique is used to sense the presence of primary user (PU) signal. Simulation result shows that cooperative spectrum sensing with OR rule is the best among hard combination data fusion in Cognitive Radio and gives the better performance than AND and MAJORITY rules.
gyrA Gene Mutation Conferring Phenotypic Cross-Resistance among Fluoroquinolones (Ofloxacin, Levofloxacin and Gatifloxacin) in Multidrug Resistant Mycobacterium tuberculosis Strains Isolated from Pulmonary MDR-TB Patients in Bangladesh  [PDF]
Tamanna Tasnim, Fatema Mohammad Alam, S. M. Ali Ahmed, Shirin Tarafder, S. M. Mostofa Kamal, Shamim Hossain
Journal of Tuberculosis Research (JTR) , 2018, DOI: 10.4236/jtr.2018.63021
Abstract: Background and objectives: Fluoroquinolones (FLQs) are an essential component of multidrug resistant-tuberculosis (MDR-TB) treatment regimen but unfortunately the emergence of FLQ resistant MDR-TB cases is challenging the current MDR-TB treatment regimen. FLQ resistance is mainly caused by gyrA gene mutation and phenotypic cross-resistance may occur among the different FLQs. A limited number of data exists regarding the cross-resistance phenomenon among FLQs and it appears that resistance to the present class representative FLQ, ofloxacin (OFX), may or may not correlate with complete cross-resistance to other FLQs. So the study was designed to observe if gyrA gene mutations confer to the phenotypic cross-resistance among FLQs [OFX, Levofloxacin (LFX) and Gatifloxacin (GFX)] tested. Methodology: Sputum samples from 68 diagnosed pulmonary MDR-TB cases were collected. All samples were subjected to Multiplex Real-time PCR for the detection of gyrA gene mutations and conventional culture on Lowenstein-Jensen (L-J) media followed by drug sensitivity testing (DST) of culture isolates (MDR-TB strains) by indirect proportion method for the detection of phenotypic resistance pattern to OFX, LFX and GFX. Results: Out of the 68 MDR-TB sputum samples 13 (19.11%) had MDR-TB bacilli with mutations in the gyrA gene and 11(16.18%) of the MDR-TB culture isolates were found to have resistance to FLQs by DST. The study observed that 11 MDR-TB samples with gyrA gene mutations showed complete phenotypic cross-resistance among OFX, LFX and GFX. Conclusion: This study found that mutation in the gyrA gene of the MDR-TB bacilli results in the complete cross-resistance among the FLQs (OFX, LFX and GFX) tested. It is therefore of utmost importance to carry out the base line resistance and cross-resistance tests for the individual FLQs prior to initiating the treatment of MDR-TB cases in Bangladesh for successful clinical outcomes.
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