07 Ujjwal Raj - Academia.edu (original) (raw)
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Romanian Academy. Institute of Archaeology and History of Art of Cluj-Napoca
Centre National de la Recherche Scientifique / French National Centre for Scientific Research
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Papers by 07 Ujjwal Raj
International Journal of Surgery Science, 2022
Gallstone disease is the most common surgical problem encountered by general surgeons and constit... more Gallstone disease is the most common surgical problem encountered by general surgeons and constitutes the major portion of abdominal surgery in our practice. Gallstones are formed by super saturation of cholesterol in bile in the presence of other enucleating factors and calcium salts of bilirubin. In understanding the gallstone disease the knowledge of biochemical composition of gallstone is of huge importance. Broadly classified in 3 types (based on cholesterol content) that is cholesterol stone, mixed stone and pigment stone.
International Journal of Computer Applications, 2019
Credit card fraud is a serious problem in financial services. Billions of dollars are lost due to... more Credit card fraud is a serious problem in financial services. Billions of dollars are lost due to credit card fraud every year. There is a lack of research studies on analyzing real-world credit card data owing to confidentiality issues. In this paper, machine learning algorithms are used to detect credit card fraud. Standard models are firstly used. Then, hybrid methods which use AdaBoost and majority voting methods are applied. To evaluate the model efficacy, a publicly available credit card data set is used. Then, a real-world credit card data set from a financial institution is analyzed. In addition, noise is added to the data samples to further assess the robustness of the algorithms. The experimental results positively indicate that the majority voting method achieves good accuracy rates in detecting fraud cases in credit cards.
International Journal of Surgery Science, 2022
Gallstone disease is the most common surgical problem encountered by general surgeons and constit... more Gallstone disease is the most common surgical problem encountered by general surgeons and constitutes the major portion of abdominal surgery in our practice. Gallstones are formed by super saturation of cholesterol in bile in the presence of other enucleating factors and calcium salts of bilirubin. In understanding the gallstone disease the knowledge of biochemical composition of gallstone is of huge importance. Broadly classified in 3 types (based on cholesterol content) that is cholesterol stone, mixed stone and pigment stone.
International Journal of Computer Applications, 2019
Credit card fraud is a serious problem in financial services. Billions of dollars are lost due to... more Credit card fraud is a serious problem in financial services. Billions of dollars are lost due to credit card fraud every year. There is a lack of research studies on analyzing real-world credit card data owing to confidentiality issues. In this paper, machine learning algorithms are used to detect credit card fraud. Standard models are firstly used. Then, hybrid methods which use AdaBoost and majority voting methods are applied. To evaluate the model efficacy, a publicly available credit card data set is used. Then, a real-world credit card data set from a financial institution is analyzed. In addition, noise is added to the data samples to further assess the robustness of the algorithms. The experimental results positively indicate that the majority voting method achieves good accuracy rates in detecting fraud cases in credit cards.