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Mentoring is an intense relationship between a senior experienced individual who is the mentor and a less experienced individual who is the protégé. Mentors provide counselling, guidance, advice, support and feedback for the protégé's personal and professional development. With the well-being of the family as the central issue in family firms, mentoring is often seen to be akin to a parent–child relationship. In Bangladesh, paternalistic and informal parental mentoring is the norm for grooming children both morally and professionally. Using six caselets of large family firms of Bangladesh, this chapter provides insight into the paternalistic style of mentoring, and also the generational differences in mentoring between the firm's owner and his successor.

To investigate the effects of chemical reaction on natural convection heat and mass transfer from a sphere with temperature dependent viscosity.

The governing boundary layer equations are transformed into a non‐dimensional form and the resulting nonlinear system of partial differential equations are reduced to local non‐similarity boundary layer equations, which are solved numerically by very efficient implicit finite difference method together with Keller box scheme.

The effects of chemical reaction, the skin‐friction coefficients, surface heat transfer rates, velocity and concentration distribution decrease as well as the mass transfer rates and temperature distribution increase within the boundary layer.

The investigation is valid for steady two‐dimensional laminar flow. The concentration of the reactant is maintained at a constant value and the sphere is isothermal. An extension to unsteady flow with temperature dependent thermal conductivity is left for future work.

This result provides guidance to engineers about heat and mass transfer with the effects of chemical reaction from isothermal spherical surface.

To investigate the effect of viscous dissipation on unsteady, combined convective heat transfer to water near its density maximum in a rectangular cavity.

The upwind finite difference scheme along with successive over relaxation iteration technique is used to solve the governing equations for mixed convection flow of water with density maximum inversion in a rectangular cavity.

The effect of viscous dissipation was to increase the fluid temperature and resulted in the formation of vortex motion near the lower part of the cavity in an opposite direction to the central vortex. An increase in the Eckert number and Reynolds number of the flow resulted in augmented surface heat transfer rates from the top heated surface.

The analysis is valid for unsteady, two dimensional laminar flow. Isothermal conditions are assumed for the top and bottom walls. An extension to unsteady three dimensional flow case is left for future work.

The method is very useful to analyze nuclear reactor thermal/hydraulic loss of coolant transients, energy conservation, ventilation of rooms, solar energy collection, cooling of electronic equipment, dispersion of waste heat in estuaries and crystal growth in liquids.

The results of this study may be of interest to engineers interested in heat transfer augmentation of mixed convection in window cavities.

The purpose of this paper is to analyse the legendary decision of the Appellate Division of the Supreme Court of Bangladesh. Apart from this, the author’s aim is to analyse the constitutional interpretation done by the Higher Judiciary of the Country. Another aim of this note is to simplify the decision of this case for the understanding of the mass people and law students.

To conclude this paper, both qualitative and analytical methods have been used.

In this paper, a summarized fact of the case has been presented. In addition to that, decision of the High Court Division in the Writ petition has been simplified with six simple points. Moreover, major arguments submitted by both the Appellant’s and Respondent’s Lawyers have been summarized. Decision of the Appellate Division has been simplified with 12 simple points along with the reasoning behind the judgement.

In this paper, only the case of Secretary, Ministry of Finance vs Md. Masdar Hossain and Others has been studied and analysed in depth.

This paper will mainly help the Law and Social Science students for simply understanding the decision and the reasoning behind the decision of the case. Apart from that, this case noting will help both academics and legal professionals to study this case within a short period.

This paper will help mass people who want to study about this case to simply understand the case in depth. In addition to that, people will get known about the procedure hoe the subordinate judiciary of Bangladesh became independent.

This conceptual paper is the original piece of work and is not under review in any other journal. This paper has not been published previously in any other journal.

This paper aims to examine the legal position and utility of preamble and also to determine what role has been played by Preambles in new trends in Bangladesh and Indian Constitutional Law.

The research methodology undertaken in this project is analytical method of research and comparative research.

In this paper, the first legal and academic dispute and a matter of arguments and discussions that whether preamble should be treated as a part of constitution is discussed. Also, this paper tries to examine the matter of interpretational value of preamble, i.e. role of preamble in interpretation of constitution vis-à-vis of statutes. Finally, this paper examines in particular the details of preambles of two countries that have played a prominent part in the development of Constitutionalism in India and Bangladesh.

This research work is based on both primary and secondary data. The main sources of this study include like textbooks, journal articles, some important daily newspapers, online documents and some publications. The study has also relied on decided cases of Apex Court of Bangladesh and the Subcontinent.

The paper's aim is to investigate the mixed convection flow of an electrically conducting and viscous incompressible fluid past an isothermal vertical surface with Joule heating in the presence of a uniform transverse magnetic field fixed relative to the surface. It was assumed that the electrical conductivity of the fluid varies linearly with the transverse velocity component.

The governing boundary layer equations were solved numerically. The boundary layer equations were first reduced to a convenient form by using two different formulations, namely, (i) the stream function formulation (SFF) and (ii) primitive variable formulation (PVF).

It was observed that both the local shear‐stress and Nusselt number increase with increasing value of local magnetic parameter, ξ.

In the present investigation, we investigated the effects of Joule heating on MHD mixed convection boundary layer flow of an electrically conducting viscous incompressible fluid past an isothermal vertical flat plate in the presence of a transverse magnetic field fixed relative to the surface of the plate. The analysis was valid for a steady, two dimensional laminar flow. An extension to three dimensional flow case is left for future work.

Here we have analyzed the problem of mixed convection flow of electrically conducting and viscous incompressible fluid past an isothermal vertical surface with viscous and Joule heating in presence of a uniform transverse magnetic field fixed relative to the surface. The work would be useful in the thermal management of heat transfer devices.

The results of this study may be of interest to engineers interested in heat exchanger design.

The purpose of this work is to study the mixed convection boundary layer flow past a vertical cylinder in a porous medium saturated with a nanofluid. Numerical results for friction factor, surface heat transfer rate and mass transfer rate have been presented for parametric variations of the buoyancy ratio parameter Nr, Brownian motion parameter Nb, thermophoresis parameter Nt and Lewis number Le. The dependency of the surface heat transfer rate (Nusselt number) and mass transfer rate on these parameters has been discussed.

Solutions of the set of non-similarity equations are obtained by employing the implicit finite difference method together with Keller box elimination method.

It was found that the heat transfer rate decreases and mass transfer rates increase as Lewis number increases. The heat and mass transfer rates increase as the buoyancy ration parameter increases. As the thermophoresis parameter Nt increases, the heat transfer rate decreases where as the mass transfer rate increases. As the Brownian parameter Nb increases, the heat transfer rate decreases. Brownian motion decelerates the flow in the nanofluid boundary layer. Brownian diffusion promotes heat conduction. The heat and mass transfer rates increase as the buoyancy ratio number Nr increases. The Brownian motion and thermophoresis of nanoparticles increases the effective thermal conductivity of the nanofluid. Both Brownian diffusion and thermophoresis give rise to cross diffusion terms that are similar to the familiar Soret and Dufour cross-diffusion terms that arise with a binary fluid.

The analysis is valid for steady, mixed convection two-dimensional boundary layer flow in a nanofluid-saturated Darcy porous medium. An extension to non-Darcy porous medium is left as a part of future study.

The research is applicable for enhancing heat exchanger effectiveness by employing nanofluids.

The study is useful to engineers interested in designing heat exchangers, water and atmospheric pollution.

The purpose of this paper is to conduct a detailed investigation of the two-dimensional natural convection flow of a dusty fluid. Therefore, the incompressible boundary layer flow of a two-phase particulate suspension is investigated numerically over a semi-infinite vertical flat plate. Comprehensive flow formations of the gas and particle phases are given in the boundary layer region. Primitive variable formulation is employed to convert the nondimensional governing equations into the non-conserved form. Three important two-phase mechanisms are discussed, namely, water-metal mixture, oil-metal mixture and air-metal mixture.

The full coupled nonlinear system of equations is solved using implicit two point finite difference method along the whole length of the plate.

The authors have presented numerical solution of the dusty boundary layer problem. Solutions obtained are depicted through the characteristic quantities, such as, wall shear stress coefficient, wall heat transfer coefficient, velocity distribution and temperature distribution for both phases. Results are interpreted for wide range of Prandtl number Pr (0.005-1,000.0). It is observed that thin boundary layer structures can be formed when mass concentration parameter or Prandtl number (e.g. oil-metal particle mixture) are high.

The results of the study may be of some interest to the researchers of the field of chemical engineers.

The paper's aim is to investigate the natural convection flow of an Ostwald‐de Waele type power law non‐Newtonian fluid past an isothermal vertical slotted surface.

The Keller‐Box method is used to solve the governing boundary layer equations for the natural convection flow of an Ostwald‐de Waele type power law non‐Newtonian fluid past an isothermal vertical slotted surface.

As the slip parameter increases, the friction factor increases whereas the heat transfer rate decreases. Owing to increase in the value of the Prandtl number, Pr, there is decrease in the value of the skin‐friction coefficient, and augmentation of heat transfer rate. As the viscosity index n increases, both the friction factor and the heat transfer rate increase.

The analysis is valid for steady, two‐dimensional laminar flow of an Ostwald‐de Waele type power law non‐Newtonian fluid past an isothermal vertical slotted surface. An extension to three‐dimensional flow case is left for future work.

The method is useful to analyze perforated plates and wire netting such as perforated wings in order to reduce the drag by suction of the boundary layer, filtration or air‐conditioning.

The results of this study may be of interest to engineers interested in heat transfer augmentation and drag reduction in heat exchangers.