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    Volume 3, Isuue 3, Sep 2017


    Improving the controlling design and operation of a finger simulator
    Md. Nasfikur R. Khan, Faisal B. Sahin, Md. Asif Rahman, Pranti Tawheed, Sarmila Yesmin
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      • Abstract: Different kinds of simulators are available to test the finger (metacarpophalangeal) joint prosthesis devices before assembling inside the human body. Generally, those run by PIC microcontroller, which are critically designed and very large in sizes. Recently, different kinds of small, programmable and less energy consuming Circuit Boards have been used to run various electronic projects or systems. Additionally these small circuit boards are also valid for controlling the applications of the simulators. The School of Mechanical & Systems Engineering of Newcastle University, currently, is in possession of four pneumatic simulators which was previously used to test finger prostheses. Each rig has conducted in the vicinity of one hundred million cycles of flexion and extension. The aim of this project is to improve the design of controlling the finger simulator by using a programmable circuit board. The project has been divided into three different categories, designing, making and testing..

    Mechanical Engineering in Ancient Egypt, Part 46: Birds Statues (Duck, Ibis and Hen)
    Galal Ali Hassaan
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      • Abstract: The ancient Egyptians produced statuettes for ducks, ibises and hens since the time of Naqada I and Naqada II. They produced statuette and figurines for those birds not only as birds but also as domestic applications such as amulets, jars, spoons, combs and cosmetic boxes. The designs and materials used are investigated with analysis of each item for dimensions, beauty aspects and present location (if known).

    Ultra-high Birefringent Photonic Crystal Fiber for Sensing Applications
    Md. Iqbal Hossain Abdullah, Md. Ishtiaq Hasan, Md. Nafiz Ahbabur Rahman, Md. Aseer Awsaf, Mohammad Mahmudul Alam Mia, Shovasis Kumar Biswas
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      • Abstract: We proposed a novel structure of photonic crystal fiber (PCF) which provides ultra-high birefringence with ultra low confinement loss for sensing application. Finite element method is used to characterize the modal properties of our proposed PCF. According to Simulation we found ultra high birefringence of 2.962×10-2 at operating wavelength 1550nm. The proposed PCF also offers large value of negative dispersion coefficient of – 354.3 ps/(nm.km), large value of nonlinear coefficient of 66.36 W-1km-1, and ultra low confinement loss in the order of 10-5. .

    Microcontroller Based Photo-Electric Control System
    Chukwuedozie N. Ezema, Chinazam C. Ezema, ThankGod D. Ekwunife
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      • Abstract: Street light has become part of our environment. Good street lighting provides and enhances safety in the community for residents, pedestrians and road users. Street lighting helps people feel safe and helps to reduce car crashes and crime. There are no specific hours for the lights to be on. Street lights are switched on and off by photo-electric control units, which react to changes in light levels. Thus the objective of this research is to design and implement a Photo-Electric Control System using AT89c51 Microcontroller and Light dependent resistor (Light/Dark Sensor). This was done by first comparing the different design approaches for each functional part to determine feasible and still affordable designs. The underlying hardware is complex and small, manufacturer-defined; ‘power on reset routine’ must be run to place this hardware into an appropriate state before it can begin executing the user program. Running this reset routine requires that the microcontroller’s oscillator is operating. Application software was used to implement street light Control function. Each individual module was designed separately. After successful simulation and testing, they were put together to create the finalized version. Then, analysis was performed on the entire materials comparable to components that are already available in the market. The outcome of the design implementation of the microcontroller based photo-electric control system was satisfactory. This study recommends that further research work be carried out to design and implement automatic lighting system with remote database capable of sending signal and situation reports regarding operational parameters such as battery life and maintenance tips..