A5057350837- Advanced Combustion Engine Technologies
- Semiconductor Quantum Structures and Devices
- Quantum and electron transport phenomena
- Combustion and flame dynamics
- Advancements in Semiconductor Devices and Circuit Design
- Vehicle emissions and performance
- Semiconductor materials and devices
- Biodiesel Production and Applications
- Fluid Dynamics Simulations and Interactions
- Ship Hydrodynamics and Maneuverability
- Anomaly Detection Techniques and Applications
- Wave and Wind Energy Systems
- Energy Efficient Wireless Sensor Networks
- Heat transfer and supercritical fluids
- Network Security and Intrusion Detection
- Distributed Sensor Networks and Detection Algorithms
- Quantum Information and Cryptography
- Global Energy Security and Policy
- Water Systems and Optimization
- Fault Detection and Control Systems
- Smart Grid Security and Resilience
- Global Energy and Sustainability Research
- Fluid Dynamics and Heat Transfer
- Mathematical Dynamics and Fractals
- Transportation Systems and Infrastructure
National Institute of Science and Technology
2013-2023
Rangamati Science and Technology University
2022
University of Chittagong
2022
Chattogram Veterinary and Animal Sciences University
2022
Institute of Engineering
2017
Central Water and Power Research Station
2004-2015
Southwest Research Institute
2012-2013
Aptiv (United States)
2008-2009
University of Wisconsin–Madison
1997-1999
Loughborough University
1994-1997
House hunting, or the act of seeking for a place to live, is one most significant responsibilities many families around world. There are numerous criteria/factors that must be evaluated and investigated. These traits can both statistically qualitatively quantified expressed. also hierarchical link between elements. Furthermore, objectively/quantitatively assessing qualitative characteristics difficult, resulting in data inconsistency and, as result, uncertainty. As ambiguity dealt with using...
In current days, sensor nodes are deployed in hostile environments for various military and commercial applications. Sensor becoming faulty having adverse effects the network if they not diagnosed inform fault status to other nodes. Fault diagnosis is difficult when behave some times provide good data at times. The intermittent disturbances may be random or kind of spikes either regular irregular intervals. literature, algorithms based on statistical methods using repeated testing machine...
An electronically controlled Caterpillar single-cylinder oil test engine (SCOTE) was used to study diesel combustion. The SCOTE retains the port, combustion chamber, and injection geometry of production six cylinder, 373 kW (500 hp) 3406E heavy-duty truck engine. equipped with an electronic unit injector common rail that is capable multiple injections. emissions investigation carried out using a sixmode cycle simulation EPA Federal Transient Test Procedure. results show meets current...
We study the low temperature multisubband electron mobility in a structurally asymmetric GaAs/AlxGa1-xAs delta doped double quantum well. calculate subband energy levels and wave functions through selfconsistent solution of coupled Schrodinger equation Poisson's equation. consider ionized impurity scattering, interface roughness alloy disorder scattering to mobility. The screening potentials is obtained by using static dielectric response function formalism within random phase approximation....
We study the enhancement of electron mobility μ in barrier delta-doped GaAs/AlGaAs quantum-well-based modulation-doped field-effect transistor (MODFET) structures. asymmetrically vary doping concentrations Nd1 and Nd2 barriers on substrate surface sides, respectively, to obtain a nonlinear as function well width w through multi-subband effects. show that an increase concentration increases density Ns, which turn enhances μ. Interchanging leads no change Ns but rather, for > owing asymmetric...
We analyze the structural-asymmetry-induced nonlinear enhancement of electron mobility μ in a GaAs/InxGa1−xAs double-quantum-well pseudomorphic high-electron-mobility transistor (p-HEMT). consider well widths wi and ws doping concentrations ndi nds barriers along substrate (inverted doping) surface (surface doping), respectively. show that for suitable choice nds, variation leads to interesting changes occupation subbands, i.e., first, single-subband, then double-subband, again,...
The Computational Fluid Dynamics (CFD) code KIVA II has been applied to simulate the in-cylinder mean air motion (tumble) and turbulence levels in a motored 4-stroke single cylinder engine with pentroof combustion chamber geometry, having two inlet exhaust valves. In-cylinder flow during intake compression strokes were simulated comparison between computational experimental results made. turbulent kinetic energy tumble ratio variation stroke obtained CFD, have compared data from published...
This paper investigates the motion response of a floating body in time domain under influence small amplitude regular waves. The governing equations describing balance wave‐exciting force with inertial, damping, and restoring forces are transformed into frequency by applying Laplace transform technique. Assuming is initially at rest waves act perpendicular to vessel lateral symmetry, hydrodynamic coefficients were obtained terms integrated sectional added‐mass, coefficients, derived from...
Non-monotonic mobility μ of electrons is obtained in a pseudomorphic GaAs/InxGa1−xAs high electron transistor having double quantum well structure with asymmetric doping concentrations the outer barriers. A dip occurs close to resonance subband states because mechanical transfer wave functions between wells. Near resonance, asymmetry and anticrossing energy levels as function concentration influence intra- intersubband scattering rate matrix elements. spread asymmetrically exhibit thereby...