12-segment display for the Bengali numerical characters

For representing the Bengali numerical characters the researchers have been working for a long time. In this paper, the idea of 12-segment display is introduced which ensures better outlook than the existing or proposed display systems. A 12-segment display for Bengali Numerical Characters needs 4-bit inputs for representing each digit. Appropriate logic circuits are also designed for that purpose

COVID-19 and Bangladesh Macroeconomic Impact and Policy Choices

Bangladesh, like most of the countries in the world, had to restrict mobility and economic activities to tackle the spread of the COVID-19 virus. Indeed, the pandemic has been exerting pressure on the economy through both global and domestic shocks leading to a detrimental impact on major macroeconomic correlates of the country. The present study urges that Bangladesh will need to pursue a countercyclical fiscal policy stance in the face of deceleration in aggregate demand. The study further maintains that greater fiscal resources should be directed towards those people, households and enterprises having a higher propensity to consume and invest. From this perspective, the study strongly advocates for direct cash transfers, food support, and enhanced public expenditures in health and education rather than a general increase in public expenditures and subsidised credit flow. Using Computable General Equilibrium (CGE) model, the study presents ex-ante economic-wide impact analyses of two expansionary fiscal policy interventions. Doubling government transfers to lowincome household categories is expected to have a greater impact on the real consumption of poorer households. In contrast, a 50 per cent increase in government expenditure for health and education will have a greater positive impact on real GDP and export. In view of the trends of the last decade, the study concludes that it is not the lack of resources, rather the limited capacity of the government agencies which poses the major challenge in pursuing an expansionary fiscal policy in the country

Performance Evaluation of Cognitive Radio Network Based on 2-D Markov Chain, Journal of Telecommunications and Information Technology, 2015, nr 3

The objective of cognitive radio network is to enhance the wireless network spectrum utilization. In such a network, two types of users are enlisted, namely primary user (PU) and secondary user (SU). The PU can access any channel in case of its availability, but SU users have lower priority and can access a channel only when it is unused by PUs. The performance of such a network solely depends on two traffic parameters: probability of false alarm and probability of misdetection. In this paper the performance of such a network is analyzed based on two dimensional Markov chain including those parameters. The main contribution of this paper is to evaluate blocking probability and PU and SU throughput using the state transition chain instead of existing statistical analysis

Numerical simulation of periodic MHD casson nanofluid flow through porous stretching sheet

The perspective of this paper is to characterize a Casson type of Non-Newtonian fluid flow through heat as well as mass conduction towards a stretching surface with thermophoresis and radiation absorption impacts in association with periodic hydromagnetic effect. Here heat absorption is also integrated with the heat absorbing parameter. A time dependent fundamental set of equations, i.e. momentum, energy and concentration have been established to discuss the fluid flow system. Explicit finite difference technique is occupied here by executing a procedure in Compaq Visual Fortran 6.6a to elucidate the mathematical model of liquid flow. The stability and convergence inspection has been accomplished. It has observed that the present work converged at, Pr ≥ 0.447 indicates the value of Prandtl number and Le ≥ 0.163 indicates the value of Lewis number. Impact of useful physical parameters has been illustrated graphically on various flow fields. It has inspected that the periodic magnetic field has helped to increase the interaction of the nanoparticles in the velocity field significantly. The field has been depicted in a vibrating form which is also done newly in this work. Subsequently, the Lorentz force has also represented a great impact in the updated visualization (streamlines and isotherms) of the flow field. The respective fields appeared with more wave for the larger values of magnetic parameter. These results help to visualize a theoretical idea of the effect of modern electromagnetic induction use in industry instead of traditional energy sources. Moreover, it has a great application in lung and prostate cancer therapy

Protection against shigellosis caused by Shigella dysenteriae serotype 4 in guinea pigs using Escherichia albertii DM104 as a live vaccine candidate strain

Recently, we reported the induction of protective immunity by environmental Escherichia albertii strain DM104 against Shigella dysenteriae in guinea pig model. In this study, we assessed three different immunization routes, such as intranasal, oral, and intrarectal routes, and revealed differences in immune responses by measuring both the serum IgG and mucosal IgA antibody titers. Protective efficacy of different routes of immunization was also determined by challenging immunized guinea pigs against live S. dysenteriae. It was found that intranasal immunization showed promising results in terms of antibody response and protective efficacy. All these results reconfirm our previous findings and additionally point out that the intranasal immunization of the environmental E. albertii strain DM104 in guinea pig model can be a better live vaccine candidate against shigellosis

An efficient routing protocol for mobile ad hoc networks with Neighbor Awareness and Multicasting

An ad hoc Network is built on the fly where a number of mobile nodes work in cooperation without the engagement of any centralized access point or any fixed infrastructure. In this paper, we proposed an efficient routing protocol for ad hoc networks which we named as NAMP (Neighbor Aware Multicast Routing Protocol). NAMP aims at achieving higher performance by reducing control overhead and improvement of the endto-end delivery of data packets. It is a tree based, hybrid multicast routing protocol. For route creation, NAMP uses the neighboring information and dominant pruning approach. It uses secondary forwarder method for route maintenance

COVID-19 and Bangladesh : macroeconomic impacts and policy choices

Bangladesh, like most of the countries in the world, had to restrict mobility and economic activities to tackle the spread of the COVID-19 virus. Indeed, the pandemic has been exerting pressure on the economy through both global and domestic shocks leading to a detrimental impact on major macroeconomic correlates of the country. The present study urges that Bangladesh will need to pursue a countercyclical fiscal policy stance in the face of deceleration in aggregate demand. The study further maintains that greater fiscal resources should be directed towards those people, households and enterprises having a higher propensity to consume and invest. From this perspective, the study strongly advocates for direct cash transfers, food support, and enhanced public expenditures in health and education rather than a general increase in public expenditures and subsidised credit flow

Evaluation of Recently Developed Regression Equation with Direct Measurement of Low-density Lipoprotein Cholesterol in a Bangladeshi Population

Background: Meaningful underestimation of low-density lipoprotein (LDL) cholesterol is an important shortcoming of Friedewald’s formula (FF) at higher triglyceride (TG) levels. Recently a regression equation (RE) has been developed using lipid profiles in one setting and validated externally for the calculation of LDL cholesterol. This newly developed RE requires more studies in different settings. Objective: The aim of this study was to evaluate the performance of the regression equation against direct measurement. Materials and Methods: Lipid profiles of 600 subjects attending a tertiary healthcare center were included in this study. Specimens were collected and lipid profiles were measured by standard methods. Sixty two lipid profiles with TG above 400 mg/dL were excluded. Calculated LDL cholesterol values using FF and RE were compared with measured LDL cholesterol by Pearson’s correlation test, Passing & Bablok regression, accuracy within ±5% and ±12% of measured LDL cholesterol and two-tailed paired t test at various TG ranges. Results: The mean value of LDL cholesterol was 148.6 ± 37.2 mg/dL for direct measurement, 146.9 ± 42.4 mg/dL for FF and 148.6 ± 34.7 mg/dL for RE. The correlation coefficients of calculated LDL cholesterol values with measured LDL cholesterol were 0.949 (p<0.001) for FF and 0.959 (p<0.001) for RE. Passing & Bablok regression equation against measured LDL cholesterol was y = 0.897x + 16.2 for FF and y = 1.0842x – 13.1 for RE. Accuracy within ±5% of measured LDL cholesterol was 45% for FF, 57% for RE and within ±12% of measured LDL cholesterol was 84% for FF, 93% for RE. When calculated LDL cholesterol was compared with measured LDL cholesterol at different TG ranges, FF significantly underestimated LDL cholesterol at TG concentrations above 200 mg/dL whereas no significant difference was observed for RE. Conclusion: This study reveals that RE equation has similar performance to direct measurement for calculation of LDL cholestero

Computational modelling of multiphase fluid flow behaviour over a stretching sheet in the presence of nanoparticles

Present study analysed hydrodynamic flow behaviour of multiphase radiative Casson and Maxwell fluids with the appearance of nano-sized particles. The impression of a nonlinear chemical reaction is also considered. Firstly, the time-dependent governing equations were computationally resolved using finite difference discretisation methods. Secondly, the convergence analysis with stabilisation of the numerical approach is carried out where the current model has converged for Le ≥ 0.025 and Pr ≥ 0.075. Finally, the impressions of various pertinent parameters are depicted diagrammatically along with tabular analysis on diversified flow fields. The main aim is to define and draw a comparison between Maxwell and Casson fluids on different flow fields. In addition, a comparative study between these two fluids is also newly carried out in this work through the analysis of streamlines and isotherms plotting. Furthermore, the thermal and mass properties found significantly improved mostly in the case of Maxwell fluid. However, Eckert number, Ec, has influenced the temperature field significantly for Casson fluid, and some parameters (Du, Nt, Nb, Le, Pr and Sr) have represented the identical impact on respective fields for both fluids. For the numerical validation, some comparisons are also shown with previous studies and satisfactory agreement is observed