American Journal of Scientific Research and Essays


Design and Implementation of an Eye-Controlled Self-Driving Wheelchair

Research article of American Journal of Scientific Research and Essays Design and Implementation of an Eye-Controlled Self-Driving Wheelchair Hatem Al-Doais*, Farouk A. K. Al-Fuhaidy*, Ahmed T. Al-Oqabi**, Esmail A. Qasabah**, Ahmed A. Zabarah**. *Ibb Univ, **Sanaa University The purpose of this paper is to develop a mechatronic system, the Eye-Controlled Self-Driving Wheelchair (ECSDW), that can help paralyzed, handicapped or any peoples who have an injury in their upper part of the body to be easily and successfully navigate autonomously from one position to another within indoor environments while avoiding obstacles dynamically. This research aims to present a unique approach which can be achieved inexpensively and has the eye-controlled additional property with robust autonomous assistive navigation when compared to a commercial existing wheelchair. The proposed ECSDW system platform is capable of localization and mapping, as well as robust obstacle avoidance, using only a commodity RGB-D sensor and wheel odometry. The development of the proposed ECSDW system was firstly carried by simulating the navigation of the wheelchair using Gazebo and Rviz running in ROS. Secondly, the hardware was assembled and built and the ROS nodes were implemented using Python programming language. Finally, the GUI was designed and implemented for a custom map so that, the disabled user can stare to a specific location using the GUI, with the help of eye-tracker sensor, which accepts directed eye signals and direct the wheelchair to navigate to the desired position autonomously. Keywords: Eye-Tracking,Self-Driving,Odomtry,ROS, Gazebo, SLAM, Qt ...

Effects of Radiation and Heat Generation on Magnetohydrodynamic Free Convection Flow along a Horizontal Cylinder with Conduction

Research article of American Journal of Scientific Research and Essays Effects of Radiation and Heat Generation on Magnetohydrodynamic Free Convection Flow along a Horizontal Cylinder with Conduction K. M. Safiqul Islam1, M. A. Alim2 and Md. Rezaul Karim3 1Department of Mathematics, Gowripur Govt. College, Mymensingh 2Department of Mathematics, Bangladesh University of Engineering and Technology, Dhaka -1000, Bangladesh. 3Department of Mathematics, Jagannath University, Dhaka-1100, Bangladesh In this paper, the flow characteristics and the heat transfer process due to natural convection and conduction along a horizontal cylinder in presence of radiation, magnetic and heat generation effects are examined. The effects of radiation, magnetic and heat generation on electrically conducting fluid in natural convective flow along a non-linear system of partial differential equations is reduced to local non-similar horizontal cylinder with conduction have been studied in this paper. The governing boundary layer equations for this phenomenon are transformed into a non-dimensional form and the resulting partial differential forms by adopting appropriate suitable transformations. The transformed boundary layer equations are then solved numerically by using the implicit finite difference method. Numerical results of the velocity profiles and temperature distribution, coefficient of local skin friction and local rate of heat transfer distribution for the Prandtl number, radiation, magnetic and heat generation parameters are presented graphically. Detailed discussion is given for the effects of the aforementioned parameters. Significant effect is found in heat transfer distribution for Prandtl number and radiation parameter. The thermal boundary layer thickness of Prandtl number is clearer than radiation parameter. Important effect is found in heat transfer distribution in Heat Generation effect. An excellent graph is found in magnetic effect for heat transfer profile, which is as like as a spiral situation. Keywords: stream function, free convection, cylinder, Prandtl number, Grashof number ...

Research status and development direction of controlling factors of graphite mineralization in coal measures

Research article of American Journal of Scientific Research and Essays Research status and development direction of controlling factors of graphite mineralization in coal measures Tian Yuan1, Li Xiaobo2, Gong Liubing1, Li Haihua1, Yang Rui1, Xu Bohui3* 1School of Earth Science and Engineering, Hebei University of Engineering, Handan, Hebei 056038, China. 2Shandong No.5 Geo-mineral Prospecting Institute, Tai'an, Shandong 271000, China. 3male, associate professor, master's tutor, mainly engaged in research on the processing and utilization of inorganic non-metallic minerals. Coal-measure graphite mineralization control is affected by many factors. In order to explore the ore-forming control factors and influence mechanism, the paper comprehensively analyzes the influence and mechanism of each factor from five aspects of coal rock composition, coal grade, temperature, pressure and mineralizer, combined with geological examples. The results show that in the process of graphite mineralization in coal measures, the components of coal and rock have the ability of graphitization, but the higher the degree of metamorphism of coal as carbon source, the higher the degree of graphitization of products, the higher the ore-forming temperature, and the higher the degree of graphitization. The development of tectonic movement promotes the graphitization, but the degree of graphitization is different and complicated due to the stress dissipation. Different minerals in coal have different effects on graphite mineralization in coal measures, and its mechanism needs to be further explored. Finally, it is pointed out that the research direction of coal series graphite lies in the different graphitization mechanism of the same rank coal and the different influence mechanism of different minerals in coal. Fund Project: Study on the structural order degree of cryptocrystalline graphite and its ore-forming controlling factors in coal measures of Hebei natural fund (D2019402055). Keywords: Coal series graphite; Metallogenic mechanism; Graphitization ...

Review on Isolation and Antimicrobial Susceptibility Pattern of Salmonella Isolated from Slaughtered Bovine

Review article of American Journal of Scientific Research and Essays Review on Isolation and Antimicrobial Susceptibility Pattern of Salmonella Isolated from Slaughtered Bovine Gesessew, K. L.1, Mitiku, W.2 1Department of Food and Nutritional Sciences, Shambu Campus, Wollega University; 2Department of Animal Science, Shambu Campus, Wollega University Salmonella is one of the major and important foodborne pathogens of humans and animals causing salmonellosis, which have great medical and economical cost. Salmonella is comprised of two species, Salmonella bongori and Salmonella enterica, and more than 2500 recognized serovars. However, most zoonotic salmonellosis cases are caused by relatively few serovars within S. enterica. Animals and foods of animal origin are known to play a major role as a source of a variety of zoonotic Salmonella serotypes. Consumption of raw or under cooked beef and beef products are the main source of zoonotic salmonellosis. Some studies in Ethiopia reports on zoonotic salmonellosis from diarrheal patients commonly from under-five children, animals and foods of animal origin. Even though there are reports of Salmonella isolated from both humans and animals there is little information about the magnitude of the zoonotic Salmonella caused by beef and beef products. An adverse human health consequence due to the occurrence of salmonella is common in the current situation. Therefore, considering the nature of such microorganisms is important while developing treatment, prevention and controlling techniques at the value chain systems. Keywords: antimicrobial susceptibility, beef, identification, abattoir, Salmonella ...

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American Journal of Scientific Research and Essays1

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