Approximation Algorithms
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The document discusses approximation algorithms for NP-complete problems. It introduces the idea of finding near-optimal solutions in polynomial time for problems where optimal solutions cannot be found efficiently. It provides examples of the vertex cover problem and set cover problem, describing greedy approximation algorithms that provide performance guarantees for finding near-optimal solutions for these problems. The document also discusses some open questions around whether these approximation ratios can be improved.
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10 Year Impact Award Presentation - Duplicate Bug Reports Considered Harmful ...
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Ph.D. Dissertation - Studying the Impact of Developer Communication on the Qu...
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Think Locally, Act Gobally - Improving Defect and Effort Prediction Models
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Mining Development Repositories to Study the Impact of Collaboration on Softw...
Mining Development Repositories to Study the Impact of Collaboration on Softw...Nicolas Bettenburg This document proposes an approach to study the impact of collaboration on software systems through mining development repositories. The approach involves:
I. Extracting communication data such as source code comments, emails, and issue discussions from version control systems, mailing lists, and issue tracking systems.
II. Studying the impact of collaboration on software quality by computing social metrics from the extracted communication data and measuring their relationship to post-release defects.
III. Studying the impact of collaboration on the development community by analyzing data on how code contributions are managed, such as feedback and reviews, to understand how contributors, reviewers, and the software are affected by communication.
Using Fuzzy Code Search to Link Code Fragments in Discussions to Source Code
Using Fuzzy Code Search to Link Code Fragments in Discussions to Source CodeNicolas Bettenburg This document discusses a study on linking code fragments in developer discussions to corresponding parts of source code, highlighting the utility of fuzzy code search. The study aims to understand which sections of the code are most discussed in the context of bugs and fixes. It mentions the use of various methods like change log analysis and information retrieval in achieving these objectives.
A Lightweight Approach to Uncover Technical Information in Unstructured Data
A Lightweight Approach to Uncover Technical Information in Unstructured DataNicolas Bettenburg This document summarizes a technical paper that presents a lightweight approach to uncover technical information from unstructured data like bug reports and email discussions. The approach uses spell checkers and adds heuristics like identifying camel case terms and programming language keywords to help classify lines of text as technical or not. Evaluation on annotated bug reports and emails shows the approach achieves precision of 86-89% and recall of 68-86% in line classification, outperforming previous state-of-the-art techniques.
Managing Community Contributions: Lessons Learned from a Case Study on Andro...
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Studying the impact of Social Structures on Software Quality
Studying the impact of Social Structures on Software QualityNicolas Bettenburg The document discusses the relationship between social structures and software quality, specifically analyzing 300,000 bug reports through change-log analysis. It highlights the impact of source code measurements like complexity, cohesion, and coupling on predicting software errors. A case study outlines a bug related to editor lock-up stemming from exceptions in data input, summarizing a fix implemented into the codebase.
An Empirical Study on Inconsistent Changes to Code Clones at Release Level
An Empirical Study on Inconsistent Changes to Code Clones at Release LevelNicolas Bettenburg This document presents an empirical study on code clones, emphasizing the issues arising from inconsistent changes during software development. It introduces eight cloning patterns identified through case studies, illustrating how code duplication may be beneficial or problematic depending on its management. The findings reveal that only a small fraction of inconsistencies in long-lived clones lead to bugs, with many changes being intentional.
An Empirical Study on the Risks of Using Off-the-Shelf Techniques for Process...
An Empirical Study on the Risks of Using Off-the-Shelf Techniques for Process...Nicolas Bettenburg The document discusses challenges in using off-the-shelf techniques to analyze mailing list archives. It finds that up to 98% of messages contain noise and need additional processing and cleaning. Issues include resolving multiple sender identities in up to 21% of addresses, reconstructing discussion threads from the linear archives, and extracting attachments that make up around 10% of messages.
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Fuzzy Logic in Smart HomesNicolas Bettenburg The document discusses the concept of smart homes utilizing fuzzy logic to create adaptive, context-sensitive environments that cater to user needs autonomously. It outlines the necessary components like sensors and controllers, and highlights the importance of machine learning for understanding user habits and perceptions. The text also addresses challenges in scaling these systems and the ongoing research needed to enhance their functionality.
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Finding Paths in Large Spaces - A* and Hierarchical A*Nicolas Bettenburg A* search is an informed search algorithm that finds the shortest path between a starting node and a goal node. It uses a heuristic function to estimate the distance to the goal for each node, guiding the search towards the most promising nodes first. A* is optimal if the heuristic is admissible (never overestimates the actual cost to reach the goal). It is also complete and optimally efficient. The algorithm maintains two lists, an open list of nodes to explore and a closed list of explored nodes. It iteratively removes the node with the lowest estimated total cost from the open list and expands it until the goal is found.
Automatic Identification of Bug Introducing Changes
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Cloning Considered Harmful Considered Harmful
Cloning Considered Harmful Considered HarmfulNicolas Bettenburg The document discusses different types of code cloning, including intentional cloning through copy-paste and unintentional cloning due to language idioms. It notes that 10-15% of code may be cloned and that cloning can increase maintenance effort. However, cloning may also be used for experimentation without risking existing code or to address bugs through workarounds. The document outlines eight common cloning patterns and suggests that the reasons for duplication should be understood before deciding if refactoring is needed, as cloning is not always harmful.
Predictors of Customer Perceived Quality
Predictors of Customer Perceived QualityNicolas Bettenburg This document discusses models for predicting customer perceptions of software quality based on factors collected within the first three months of installation. Logistic regression is used to model rare, high-impact software failures based on variables like system size, software upgrades, operating system, etc. Linear regression is used to model frequent, low-impact customer interactions like calls based on similar predictor variables. The models found most predictors to be statistically significant due to the large sample size.
Extracting Structural Information from Bug Reports.
Extracting Structural Information from Bug Reports.Nicolas Bettenburg The bug report describes an issue where entering an invalid value for a BigDecimal property would cause the editor to lock up until restoring the default value. A patch was proposed to handle exceptions thrown by the BigDecimal constructor better by checking for a null error message and returning an alternative message or stack trace. The patch was committed to fix the problem. The document contains the bug report details, code snippets, and discussion between the reporter and assignee.
Computing Accuracy Precision And Recall
Computing Accuracy Precision And RecallNicolas Bettenburg Accuracy measures the percentage of correct predictions out of the total number of predictions. Precision measures the percentage of positive predictions that were actually correct. Recall measures the percentage of positive cases that were correctly identified.
Duplicate Bug Reports Considered Harmful ... Really?
Duplicate Bug Reports Considered Harmful ... Really?Nicolas Bettenburg The document discusses the implications of duplicate bug reports, arguing that they can often provide valuable information that may enhance the debugging process. It presents experiments demonstrating that duplicate reports contain additional relevant details, and this information can improve the triaging of bugs. Despite being frequently ignored, the document suggests reconsidering the handling of duplicates to better leverage their potential benefits.
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Paper - 108: The American Literature
Submitted Date: April 2, 2025
Paper Name: The American Literature
Topic: Thoreau’s Influence on Gandhi: The Evolution of Civil Disobedience
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Video Link: https://youtu.be/HXeq6utg7iQ
For a more in-depth discussion of this presentation, please visit the full blog post at the following link: https://rajdeepbavaliya2.blogspot.com/2025/04/thoreau-s-influence-on-gandhi-the-evolution-of-civil-disobedience.html
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Paper - 107: The Twentieth Century Literature: From World War II to the End of the Century
Submitted Date: April 4, 2025
Paper Name: The Twentieth Century Literature: From World War II to the End of the Century
Topic: From Watchdog to Lapdog: Ishiguro’s Fiction and the Rise of “Godi Media” in Post-2014 Indian Journalism
[Please copy the link and paste it into any web browser to access the content.]
Video Link: https://youtu.be/kIEqwzhHJ54
For a more in-depth discussion of this presentation, please visit the full blog post at the following link: https://rajdeepbavaliya2.blogspot.com/2025/04/from-watchdog-to-lapdog-ishiguro-s-fiction-and-the-rise-of-godi-media-in-post-2014-indian-journalism.html
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