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- PublicationEvaluation of filtering and contrast in X-ray and computerized tomography scan lung classification(2024)Deep learning provides many convenient methods to help medical practitioners take informed decisions about diverse ailments. The goal of this project is to measure the effectiveness of filters and contrast enhancement techniques qualitatively and quantitatively in classifying lung scan images. Transfer deep learning was used to obtain the necessary results, with DenseNet 121 being the base model. Salt and pepper filter was used to introduce noise, and 3�3 mean and 5�5 mean with contrast limited adaptive histogram equalization (CLAHE) was used to minimize the effect of noise. All layers excluding the rearmost were frozen, and new dense and dropout layers were added to identify features of computerized tomography (CT) scan images of lungs. The resultant models were of comparable accuracy, where the model with no filter gave the accurate results for the given data, and the one using the 5�5 mean filter gave better adaptability in classification of unseen data. The misclassification between normal and pneumonia affected lungs is relatively higher, because of the lack of distinct features between them. � 2024 Institute of Advanced Engineering and Science. All rights reserved.
- PublicationBEHAVIOUR OF REINFORCED CONCRETE STRUCTURE SUBJECTED TO BLAST LOADS(2024)Frequent unintentional explosions in industrial facilities and deliberate demolition of commercial buildings have resulted in significant financial damages, leading to increased demands on structural engineers to enhance blast resistance design methods. Therefore, comprehending the impact of blasts on structure performance is crucial. The study examined how a standard 21-storey reinforced concrete building structure responded to blast loads from TNT explosives of varying charge weights (100, 300, and 500 kg) at different standoff distances (10, 20, and 30 m). The research focused on the effects of structural walls at the core as well as peripheral infill walls. Using a three-dimensional finite element approach with nonlinear dynamic analysis via SAP2000 software based on Indian Standard specifications (IS:4991, 1968), key response parameters such as acceleration, displacements, and velocities were analyzed over time. It was observed that acceleration and velocity reached peak values earlier than displacement. The building�s blast resistance with structural walls was deemed satisfactory; furthermore, it improved with the installation of infill walls. � (2024), (Suranaree University of Technology). All Rights Reserved.
- PublicationAdvanced Materials and Structures for High Temperature Applications(2023)In the space industry, advanced materials and structures for high-temperature applications are especially crucial. Extreme pressure, heat, and other environmental conditions, as well as elevated radiation levels, must be withstood by spacecraft, satellites, and other space-based equipment. Space temperature extremes can have a variety of effects on satellites. Space's severe temperatures can result in thermal stress, which can harm or deteriorate a satellite's systems and components. There are a number of ways in which satellites or spaceships get affected by high temperatures like thermal expansion, heat dissipation, solar radiation and thermal cycling. Satellites are built with improved materials and cooling systems that can resist the thermal stress of space to lessen the impacts of high temperatures. To guard against sun irradiation and heat loss, they also use thermal coatings and insulation. In order to ensure optimal performance and longevity, satellites are also made to operate within a certain temperature range. In this research, we examine these problems and utilise the use of cutting-edge materials and architectures to identify solutions. The structural and thermal modelling are all carried out in the Ansys programme that we are using for our work and simulations. For instance, we are experimenting with copper and aluminium alloys at the surfaces that are most frequently exposed to high temperatures. These surfaces are then connected to carbon composition materials that include heat dissipators or radiators. In conclusion, due to the absence of atmosphere to act as insulation in space, things might experience significant temperature swings due to the lack of a permanent heat sink, which makes the temperature problem distinct from that on Earth. By enhancing thermal management and lowering heat generation, advanced materials in satellites can aid in overcoming these difficulties. Copyright � 2023 by Mr. Mohammed Umar. Published by the IAF, with permission and released to the IAF to publish in all forms.
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- PublicationRecycling of ceramic particulate reinforced aluminum metal matrix composites(1995)The aluminum matrix composites with ceramic dispersoids can be separated by density difference concept. In the proposed work composite scrap is recycled using an oil fired furnace. The scrap is melted in the furnace and temperature is maintained below 740 degree centigrade. Because of the density difference the lighter dispersoids will float and heavier dispersoids will settle down. The clean melt is separated be removing the floating and settled dispersoids, and then filtering using ceramic filters.
- PublicationOpen circuit potential studies of Za-27 / Sic Mmc's in acid chloride mediums(2006)This research paper involves the study of Open Circuit Potential determination of the ZA-27 alloy reinforced with Sic particulate. MMC composites are prepared by liquid melt metallurgy technique using vortex method. Composites containing 2,4,6 weight percentage of Sic particulates of 60-80micro meter since they are prepared according to ASTM standards. Rectangular specimen of 2cm length and 1cm breadth is prepared. 1sq.cm is exposed to corrosive medium, they are subjected to Open Circuit Potential study using multimeter and calomel electrode. The potential observed for 2%,4%,6% composites were less than the potential of matrix alloy for a range of 96hrs. � 2006 SAEST.
- Publicationgate io(2001)In this paper ive present a methodology for an Efficient Signature Verification scheme using the Hidden Markov Model (HMM) for verification. The method is memory and computation time efficient. One of the primary, goals in the development of this system is to facilitate real-time operation. We usc the Baum-Welch Algorithim for training the HMM and the Viterbi Algorithm for the testing of our Proposed system. It may be noted that the technique of HMMs have hitherto been applied for speech modelling and only recently has its application to the field of Signature Verification been considered. Our proposed system has an overall accuracy of 11.64% FAR and 0.64% FRR.
- Publicationgate io(2018)Rapid increase in the espousal of mobile phones and their ubiquity has significantly reflected upon the Intelligent Transport system (ITS). Some of the major ITS areas of usage include active traffic management, driver information, navigation information, Telematics and so on. Currently there are many apps for destination navigation systems and the navigation apps in Smartphone are more advanced and accurate than any conventional navigation devices. These apps can track location real time, guide to destinations, display maps to points of attraction and interest and even update about real time traffic conditions in some cities. This paper describes the working of location based navigation apps and analyzes the street view services in the navigation apps.
- PublicationSimulation and Hardware Implementation of 24Watt Multiple Output Flyback Converter(2015)DC-DC converters are mainly used to provide required output voltage by suitably controlling the pulse width modulated (PWM) signal given to the gate of the fast acting power electronics switches. Flyback converter is one such popular isolated DC-DC converter topology used to obtain regulated output voltage in low power applications. They are used as power supply systems in space technology and in many other industrial power electronics systems, where having constant voltage is very much essential. This paper presents Simulation and practical implementation of multiple output Flyback converter with Silicon Carbide (SIC) MOSFET as switching device. The designed Converter is observed to have a good output voltage regulation and higher efficiency for the wide input voltage range.