9 citations · 17 across the 17 of their papers we have counts for
19 papers
Composing Verifiable Conceptual Models via Building Blocks: Towards Design-Time Verification of Agentic AI Workflows
Noe Y. Flandre, Alexander C. Nwala, Philippe J. Giabbanelli
Agentic AI systems orchestrate multiple LLM-based agents through workflow architectures that coordinate decisions, tools, and external actions. While current platforms emphasize ru…
Behavior Change as a Signal for Identifying Social Media Manipulation
Isuru Ariyarathne, Gangani Ariyarathne, Alessandro Flammini +2
Social media accounts engaging in online manipulation can change their behaviors for re-purposing or to evade detection. Existing detection systems are built on features that do no…
Identifying the Geographic Foci of US Local News
Gangani Ariyarathne, Isuru Ariyarathne, Greatness Emmanuel-King +2
Local journalism is vital in democratic societies where it informs people about local issues like, school board elections, small businesses, local health services, etc. But mountin…
Labeled Datasets for Research on Information Operations
Ozgur Can Seckin, Manita Pote, Alexander Nwala +4
Social media platforms have become a hub for political activities and discussions, democratizing participation in these endeavors. However, they have also become an incubator for m…
3DLNews: A Three-decade Dataset of US Local News Articles
Gangani Ariyarathne, Alexander C. Nwala
We present 3DLNews, a novel dataset with local news articles from the United States spanning the period from 1996 to 2024. It contains almost 1 million URLs (with HTML text) from o…
Unmasking Social Bots: How Confident Are We?
James Giroux, Ariyarathne Gangani, Alexander C. Nwala +1
Social bots remain a major vector for spreading disinformation on social media and a menace to the public. Despite the progress made in developing multiple sophisticated social bot…
Social Bots: Detection and Challenges
Kai-Cheng Yang, Onur Varol, Alexander C. Nwala +4
While social media are a key source of data for computational social science, their ease of manipulation by malicious actors threatens the integrity of online information exchanges…
A General Language for Modeling Social Media Account Behavior
Alexander C. Nwala, Alessandro Flammini, Filippo Menczer
Malicious actors exploit social media to inflate stock prices, sway elections, spread misinformation, and sow discord. To these ends, they employ tactics that include the use of in…
Manipulating Twitter Through Deletions
Christopher Torres-Lugo, Manita Pote, Alexander Nwala +1
Research into influence campaigns on Twitter has mostly relied on identifying malicious activities from tweets obtained via public APIs. These APIs provide access to public tweets…
Garbage, Glitter, or Gold: Assigning Multi-dimensional Quality Scores to Social Media Seeds for Web Archive Collections
Alexander C. Nwala, Michele C. Weigle, Michael L. Nelson
From popular uprisings to pandemics, the Web is an essential source consulted by scientists and historians for reconstructing and studying past events. Unfortunately, the Web is pl…
What Did It Look Like: A service for creating website timelapses using the Memento framework
Dhruv Patel, Alexander C. Nwala, Michael L. Nelson +1
Popular web pages are archived frequently, which makes it difficult to visualize the progression of the site through the years at web archives. The What Did It Look Like (WDILL) Tw…
Modeling Updates of Scholarly Webpages Using Archived Data
Yasith Jayawardana, Alexander C. Nwala, Gavindya Jayawardena +4
The vastness of the web imposes a prohibitive cost on building large-scale search engines with limited resources. Crawl frontiers thus need to be optimized to improve the coverage…
SHARI -- An Integration of Tools to Visualize the Story of the Day
Shawn M. Jones, Alexander C. Nwala, Martin Klein +2
Tools such as Google News and Flipboard exist to convey daily news, but what about the past? In this paper, we describe how to combine several existing tools with web archive holdi…
365 Dots in 2019: Quantifying Attention of News Sources
Alexander C. Nwala, Michele C. Weigle, Michael L. Nelson
We investigate the overlap of topics of online news articles from a variety of sources. To do this, we provide a platform for studying the news by measuring this overlap and scorin…
Using Micro-collections in Social Media to Generate Seeds for Web Archive Collections
Alexander C. Nwala, Michele C. Weigle, Michael L. Nelson
In a Web plagued by disappearing resources, Web archive collections provide a valuable means of preserving Web resources important to the study of past events ranging from election…
Measuring News Similarity Across Ten U.S. News Sites
Grant C. Atkins, Alexander Nwala, Michele C. Weigle +1
News websites make editorial decisions about what stories to include on their website homepages and what stories to emphasize (e.g., large font size for main story). The emphasized…
The Many Shapes of Archive-It
Shawn M. Jones, Alexander Nwala, Michele C. Weigle +1
Web archives, a key area of digital preservation, meet the needs of journalists, social scientists, historians, and government organizations. The use cases for these groups often r…
Scraping SERPs for Archival Seeds: It Matters When You Start
Alexander C. Nwala, Michele C. Weigle, Michael L. Nelson
Event-based collections are often started with a web search, but the search results you find on Day 1 may not be the same as those you find on Day 7. In this paper, we consider col…
A Supervised Learning Algorithm for Binary Domain Classification of Web Queries using SERPs
Alexander Nwala, Michael Nelson
General purpose Search Engines (SEs) crawl all domains (e.g., Sports, News, Entertainment) of the Web, but sometimes the informational need of a query is restricted to a particular…