1,721,352 research outputs found
Real-time credit card fraud detection
No full textCredit card fraud is growing along with the development of technology in today’s world. Hundreds of researches have been made in the past for more than four decades and still, the problem is critical, affecting large financial and banking companies. In this paper, we are focusing on the design and development of an advanced real-time credit card fraud detection framework with the help of big data technologies from one of the leading public cloud providers, Microsoft Azure. We have designed the complete framework to satisfy most current fraud detection systems which could process a large amount of data in real-time and improve the accuracy by implementing multiple machine learning algorithms. We further implemented multiple layers of the workflow including the ingestion layer, streaming layer, processing and transformation layer, model training and scoring layer and storage layer. With the help of these, we were able to build massive storage, fast detection, model training, and real-time fraud detection system. This paper aims in designing the modern credit card fraud detection system and has been tested by a sample dataset to achieve our goal
Analysis of Customer Feedback System for Continual Quality Improvement-A Case Study from Lakshya Experiences
No full textCustomer's satisfaction is the measure of quality of a product or a service. Customers' feedback are important sources of product information on performance, improvements, and enhancement of ideas. The implementation of customer feedback system is essential to enhance the customers' satisfaction through continual improvement, which is essential for the survival of any organisation in a competitive environment. This study provides a structured approach to analyse and translate the customers' feedback into quality improvement of the product. The defects reported by the customers' on the unmanned aerial vehicle Lakshya systems were investigated while carrying out their rectification. Prompt remedial measures were also instituted to prevent their recurrence. This has resulted in the improvement of reliability and quality of the product. Finally, the implementation of customer feedback system and formalisation of defect investigation procedure for improving the quality and reliability of Lakshya systems has been described. A case study on Barco monitors (RGD 651) hasalso been demonstrated from Lakshya experience
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
The global form of flavor symmetries and 2-group symmetries in 5d SCFTs
Get PDF2-group symmetries arise when 1-form symmetries and 0-form symmetries of a theory mix with each other under group multiplication. We discover the existence of 2-group symmetries in 5d N=1 abelian gauge theories arising on the (non-extended) Coulomb branch of 5d superconformal field theories (SCFTs), leading us to argue that the UV 5d SCFT itself admits a 2-group symmetry. Furthermore, our analysis determines the global forms of the 0-form flavor symmetry groups of 5d SCFTs, irrespective of whether or not the 5d SCFT admits a 1-form symmetry. As a concrete application of our method, we analyze 2-group symmetries of all 5d SCFTs, which reduce in the IR, after performing mass deformations, to 5d N=1 non-abelian gauge theories with simple, simply connected gauge groups. For rank-1 Seiberg theories, we check that our predictions for the flavor symmetry groups match with the superconformal and ray indices available in the literature. We also comment on the mixed 't Hooft anomaly between 1-form and 0-form symmetries arising in 5d N=1 non-abelian gauge theories and its relation to the 2-groups
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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