About
45
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Introduction
Nafis Ahmad currently works at the Department of Industrial & Production Engineering, Bangladesh University of Engineering and Technology.
Additional affiliations
September 1997 - present
Publications
Publications (45)
Purpose
The purpose of this paper is to explore organizational and human factor-related challenges to information technology (IT) service management standard ISO 20000 in an emerging economy context. Then, this research has proposed some implications of the challenges to implementing environmental sustainability and circular economy.
Design/method...
This paper focuses on the application of Kaizen, one of the pillars of total productive maintenance (TPM), for improvement of overall equipment efficiency (OEE) of a ring frame section in a spinning plant. The ring frame is considered as one of the critical sections since rope-like fiber strands become a fine yarn through a high amount of attenuati...
Spinning industries are facing challenges of improving productivity in the competitive market nowadays. Ring spinning, the most widely used yarn manufacturing process for short staple spinning, uses several types of machinery from blow room to ring frame for producing yarns from cotton fibers. An enterprise can improve utilization of resources by i...
Spinning industries are facing challenges of improving productivity in the competitive market nowadays. Ring spinning, the most widely used yarn manufacturing process for short staple spinning, uses several types of machinery from blow room to ring frame for producing yarns from cotton fibers. An enterprise can improve utilization of resources by i...
In this work a framework on application of Reliability Centered Maintenance (RCM) for Lead Oxide production process in the battery industry is developed. Standard RCM method is used here through Failure Mode and Effect Analysis (FMEA) and decision making criteria is established in view of Criticality and Logic Tree Analysis (LTA). This paper also e...
In this work a framework on application of Reliability Centered Maintenance (RCM) for Lead Oxide production process in the battery industry is developed. Standard RCM method is used here through Failure Mode and Effect Analysis (FMEA) and decision making criteria is established in view of Criticality and Logic Tree Analysis (LTA). This paper also e...
Surface roughness is a quality index for machined surfaces. In this study an algorithm has been developed to determine the feasible solutions for cutting parameters in order to obtain desired surface roughness for three dimensional dies. Here the average surface roughness values for a commercial die material EN24 after ball end milling operation ha...
Machining operations are used for creating surfaces by cutting away unwanted materials from workpieces. These operations are highly constrained and non-linear in nature. As a result traditional techniques are not suitable for machining parameter optimisation. Turning and milling are the two most commonly used machining operations where machining ti...
Surface roughness of dies is considered as a vital quality characteristic. In this study, average surface roughness for a die material H13 has been measured after ball end milling operation. A design of experiment was prepared with response surface methodology (RSM). Forty-nine experiments have been conducted varying six different cutting parameter...
Surface roughness is an index which determines the quality of machined products and is influenced by the cutting parameters. In this study the average surface roughness R a (value) for Aluminum after ball end milling operation has been measured. 84 experiments have been conducted varying cutter axis inclination angle (φ degree), spindle speed (S rp...
Surface roughness is an index which determines the quality of machined products. In this study the average surface roughness value (R a) for Aluminum after ball end milling operation has been measured. 84 experiments have been conducted varying cutter axis inclination angle (φ degree), spindle speed (S rpm), feed rate (f y mm/min), radial depth of...
Inventories in a factory acts like a buffer to avoid disruption in the production or assembly lines. In this work a fuzzy interface based system is developed to take inventory decisions like inventory level, reorder point, reorder quantity etc. Input variables were demand, stock quantity-on-hand, lead time and the price of the raw material. Here ou...
Surface roughness is an index which determines the quality of machined products and is influenced by
the cutting parameters. In this study, the average surface roughness Ra (value) for aluminum after ball
end milling operation has been measured. 84 experiments have been conducted using varying cutter
axis inclination angle (φ degree), spindle speed...
Mobility of the physically disabled or crippled people is a great concern of the society. It is really difficult to realize the problems and sorrows of a physi cally disabled/crippled person who is partially or fully dependent on others or confining himself in a w heel chair with limited mobility. This paper provides idea of currentl y available th...
Project managers are required to deal with different types of projects ranging from implementing a large scale manufacturing plant to a simple sales campaign. While dealing with these projects, it is always necessary to complete the projects within the predetermined deadline. Failure to do so ultimately leads to increase in total cost. In order to...
Environmental awareness continues to rise, and customers of all types are realizing the importance of eco-friendly products which are essential to protect our planet. Green design rules are needed to support the implementation of environmental features in the practical design situation. Green design or Design for Environment (DfE) is a field of pro...
Improving productivity is one of the main concerns of apparel industries. This paper provides the idea how productivity levels changes at different time during normal working hours in apparel industries. A noble approach is also proposed to optimize the productivity level. There are many factors which act as obstacles to higher productivity. Unskil...
Flange tube, Glass shell, Lead in Wire (LIW), Filament (Coil) and Cap are the most important raw materials in case of Lamp Production Process. Manufacturing processes tend to produce operational wastages due to various reasons, which can be reduced by identifying and eliminating those reasons. It has been a very challenging engineering problem part...
Optimization of cutting parameters is one of the key obstacles for CAD/CAM integration. In this work optimum cutting parameters, the best sequence, number, and type of passes of turning operation are determined by Genetic Algorithm (GA). Proposed optimization strategy ensures that no constraint will be violated at the optimum condition and determin...
Online trading between businesses or individuals has employed attention of corporations worldwide as they are challenged to remain viable through difficult economic conditions. Despite the losses of so many businesses two years ago when the ¿dot-com bubble¿ burst, no serious business analyst disagrees that electronic commerce is steadily transformi...
Recently, the problem of map building and simultaneous localization is a hot topic in mobile robotics field In this paper, a feature map building approach based on shape similarity for the development of home robot is presented In the map building process, the robot is continuously localized as the map is being built. The odometry error between eac...
There have been many works for optimization of cutting parameters for end milling by Genetic Algorithms (GAs) and other Artificial
Intelligent (AI) techniques based on theoritical relationships. However these works do not reflect the actual shop floor situation
where experimental result is more important than theoritical result. In this work we inv...
A Genetic Algorithm (GA) and Artificial Neural Network (ANN) based hybrid optimization technique is developed to determine optimum cutting parameters, sequence, number and type of passes for turning operation. Besides common constraints like cutting force, power, surface roughness etc., rotational speed of machine tool, feed rate-depth of cut ratio...
localize Home Robot, ApriAttenda when it loses it’s position due to error or when it is completely lost because of moving it without it ’s knowledge.
Localization of Home Robot by Monte Carlo Approach
The paper presents a new approach to the problem of map building and simultaneous localization (SLAM), originally developed by this research. The global map is built by continuously matching the feature polylines obtained from the laser ranger finder. The odometry error between each constitutive step can be eliminated by the global map, which was b...
For efficient use of machine tools at optimum cutting condition, it is necessary to find a suitable optimization method, which can find optimum feasible solution rapidly and explain the constraints as well. As the actual turning process parameter optimization is highly constrained and nonlinear, a modified Genetic Algorithm with Self Organizing Ada...
A self-localization technique for home robot is developed for in-door environment. This simple and robust self-localization approach based on Monte Carlo algorithm recovers the robot from catastrophic position tracking failure or kidnapped condition. Position of the robot at different location in the map are determined by using information obtained...
As turning parameter optimization is highly constrained and nonlinear, it is necessary to investigate the suitable penalty strategy in such case. In this work, parameters for single pass turning operation are optimized. Here unit production cost is the objective function and limits of the cutting force, power, surface finish, stability condition, t...
Process planning parameters for turning operation are optimized by using GA. The results obtained by considering tool-wear and without considering the tool-wear are also compared. Machining time is considered as the objective function in this case. Constraints are machine power, allowable cutting force, maximum and minimum limits of feed rate, dept...
Process planning parameters for turning operation are optimized by using GA. The results obtained by considering tool-wear and without considering the tool-wear are also compared. Machining time is considered as the objective function in this case. Constraints are machine power, allowable cutting force, maximum and minimum limits of feed rate, dept...
Process selection and sequencing is an important part of a Computer Aided Process Planning (CAPP). In the past, traditional computer programs have been used to solve formalized problems, where the statements and principles are well understood. But the ill formalized problem like process selection in process planning requires knowledge based systems...
This paper explains manufacturing feature recognition of a rotational component using DXF file. Feature recognition integrates two independent systems: CAD and CAPP. CAD files contain detail geometric information of a part. Different CAD software uses different types of databases to store the part information. There is no common structure of the da...
CAPP system plays a key role to integrate design and manufacturing or assembly systems properly considering available resources and design constraints. Many CAPP systems have so far been developed. Different researchers adopted different advanced techniques and approaches such as feature or solid model based design, object oriented programming, tec...
In CAPP systems process parameter optimization is one of the key areas for research and development. Traditional techniques have very limited scope because of the complexity of the optimization problem. Due to the rapid development of computer technology Genetic Algorithms (GAs), which are robust search algorithm, have been found to be suitable and...
Questions
Questions (7)
Optimum layout design is an important factor that must be addressed before allocating spaces for defferent departments in any factory. Is there any software that can be used for this purpose? Factories normally have only ground floor with large open space. Office building or hospital type organizations have multi-storied. Need software for both of these purposes. Open source or paid/trial etc.
Want to check survey data/feedback collected from different stakeholders by survey regarding our undergraduate program. What factors should we consider about sample size, the reliability of data collected or result obtained by the survey? Each question has five options like strongly agree, agree, neutral, disagree and strongly disagree. We have around 20 faculty members, roughly 20 nonacademic staff, 120 ug students, approximately 500 alumni and many employers. Usually, it is tough to get feedback from the employer within a short period.
We have many different algorithms for map building and localizing a mobile robot in 2D space. In case of 3D space (open) to fly ariel vehicle, we use GPS to know the location longitude, latitude, altitude, etc. However, GPS is not suitable for the closed environment. Sometimes environment with many building or cloudy atmosphere is not suitable for using GPS. How can we localize (know the X, Y, Z coordinates) for Ariel vehicle in a closed environment?
We have been using many traditional machine tools such as lathe machine, drilling machine, shaper machine, etc. in our machine shops. These machines are standalone without any integration with any central computer system or integration with each other. However if we can integrate them with a computer system that will continuously monitor the performance/utilization, maintenance related issues, and help in scheduling them, we will get the massive benefit of advanced machine tools with least investment. So what are the ways we can make these machine a little bit intelligent (?) that will help us in our traditional machine shop? Can IoT/similar technology help us in this case?
Need to know different algoritms used for localizing mobile robot and which one is the best among them.
Dimension of the infusion pump is an important factor to be successful. Anyone having knowledge about the dimensions of a typical infusion pump can give me suggestion.
