Wingman - A New Movie Recommendation System Algorithm

By  Aayush Singh
Received: 2022-8-17 / Accepted: 2022-9-27 / Published: 2022-10-10
PDF Main Manuscript (569.94 KB)  DOI: https://doi.org/10.37906/isteamc.2022.3
Abstract In this rising new era, the world is growing faster and so are we. People nowadays need effortless services, and recommendation system is one of them. They are present and used everywhere, whether it's advertising, e-commerce or any other domain. Companies such as Netflix, YouTube, Amazon, Spotify rely on recommendation systems to boost their sales. Moreover, it increases the engagement of users with a particular app or website as it tends to show more relevant individualized content. It basically takes the user’s past history as an input and then using filtering techniques it predicts the most suitable item/content for the user as an output. The main objective of this paper is to predict movies most desired by the user with as much accuracy as possible. In this paper, I will provide a brief description of various filtering methods and the particular techniques that I used to achieve the desired result. I have used Tf-Idf to quantify the overview of the movies, then did a pairwise similarity for the Content Based Filtering. This allows the user to watch movies based on their watch history according to the plot of the movies. For Collaborative Filtering, I have used Matrix Factorization to generate real-time recommendations based on user-movie rating matrix. Correlation Coefficient is used to calculate the score. The higher the score, the more likely the movie is liked by the user. I have used the voting system for Hybrid Filtering. Weighted Rating Score is calculated with the help of the votes given to the movies by the users. Then a popularity feature is also used to generate more meaningful movie recommendations. MinMax Scalar is used to normalize the data, and then fifty percent priority is given to both Weighted Rating Score and popularity and a final score is calculated. Using this final score, popular or top movies are generated. The databases used are retrieved from MovieLens and Kaggle. Consequently, my proposed system will generate recommendations based on the plot of the movie using tf-idf and cosine similarity, based on user-movie rating matrix and correlation coefficient, based on voting and popularity basis. [More...]

Explaining Dementia Using Graph Theory and Machine Learning

By  Jaeha Lee
Received: 2022-8-30 / Accepted: 2022-9-27 / Published: 2022-10-10
PDF Main Manuscript (592.51 KB)  DOI: https://doi.org/10.37906/isteamc.2022.4
Abstract Dementia is a central nervous system neurodegenerative disease. Dementia has been discussed around different types. Among all, Alzheimer’s disease (AD) and vascular dementias (VaD) are the commonly caused disease. There is a huge research gap that graph theory has rarely been followed to explain the cognitive systems functioning particularly diseases like dementia. Thus, theoretical models of graphs can be used to interrogate the cognitive systems and the likely presence of dementia to understand the reasonings behind and thus the treatment. In this paper, three studies have been discussed in which dementia is investigated through graph theory and machine learning by using theoretical foundations to support the evidence. The first study discusses the significance of graph theory techniques and its coined ideas. There are fundamental designed parameters; connectivity, diameter vertex centrality, betweenness centrality, clustering coefficient, degree distribution, cluster analysis and graphcores. In addition to this, these are featured to analyze magneto-encephalography data to find out functional network intensity in Alzheimer’s disease affected patients. The second study explores particularly the changed structure of Alzheimer’s disease. The third study coins the significance of machine leaning philosophy that paves the way for the black box and diagnosis. [More...]

Stability and Structural Limits of Tennis Tower

By  Kunyang Liu
Received: 2022-9-10 / Accepted: 2022-9-23 / Published: 2022-9-30
PDF Main Manuscript (855.65 KB)  DOI: https://doi.org/10.37906/isteamc.2022.5
Abstract A stable structure of tennis tower can be formed by stacking tennis balls to a certain structure. This paper will explore the structural stability of stacked tennis tower and the structural limit of the tennis tower and give the factors that limits the height growth of the tennis tower by experiments. It’s proved that the friction coefficient of tennis surface is not a constant but gradually decreases with the increase of the pressure applied. Based on this conclusion and experimental data, it is deduced that the practical stacking limit of tennis tower is about 11 layers. [More...]