Ahmed Al-Baghdadi

Ph.D Candidate at Kent State University

I obtained my Bachelor's degree in Computer Science from the Department of Computer Science, University of Al-Qadisiyah, Jul 2011. I received my Master's degree in Computer Science from the Department of Computer Science, Kent State University, under the supervision of Prof. Feodor Dragan, May 2017. Since Summer 2017, I joined the Ph.D. program at the Department of Computer Science, Kent State University and work under the supervision of Prof. Xiang Lian. Also, I am a member of the Big Data Science Lab there.

Ahmed's News

Research Interest

Queries Processing over Spatial-Social Networks

With the proliferation of advanced technologies such as GPS-equipped smart devices and high-speed wireless networks (e.g., WiFi, Bluetooth, or mobile data networks), social-network users can now easily share their spatial locations via mobile devices, and request for ... location-based social networking services (e.g., Yelp, Foursquare, etc.), such as finding restaurants recommended by friends, and/or spatial locations closest to one's current working place. Therefore, location-based social networks (a.k.a. geo-social networks), that involve both spatial and social information, have recently drawn much attention from the database community, which are useful in numerous real-world applications such as location-based services (LBS), map utilities, mobile recommendation systems, and so on.

Queries Processing over Road Networks

There are many real-world applications on road networks such as location-based services (LBS), supply chain management, map services, transportation systems, and so on. One intersting and important problem is to find the best path (e.g., with the smallest traveling time or ... distance)between a source and a destination over road networks while taking into account the quality constraints (e.g., obstacles) of the returned paths, such as uneven roads, roads under construction, and weather conditions on roads.

Graph Analysis

Graph or network analysis has many popular application. One example is facility location: a company planning to open a store in a city might be interested in knowing one or few locations that are close, on average, to a large number of potential customers. In viral marketing, the crucial ...question is to find a group of people in a network who can trigger the most efficient product adoption. National security, power grid administration, and computer network management are other applications that stated in to benefit from the discovery of nodes with most closeness centrality in a network.


Ahmed Al-Baghdadi and Xiang Lian. “Topic-based Community Search over Spatial-Social Networks”. In Proceedings of the Very Large Data Bases Conference (PVLDB), Tokyo, Japan, Aug. 2020.
Ahmed Al-Baghdadi, Gokarna Sharma, and Xiang Lian. “Efficient Processing of Group Planning Queries Over Spatial-Social Networks”. In IEEE Transactions on Knowledge and Data Engineering (TKDE), 2020.
Ahmed Al-Baghdadi, Xiang Lian, and En Cheng. "Efficient Path Routing Over Road Networks in the Presence of Ad-Hoc Obstacles". In Information Systems (IS), 88, 2020.
Ahmed Al-Baghdadi, "COMPUTING TOP-K CLOSENESS CENTRALITY IN UNWEIGHTED UNDIRECTED GRAPHS REVISITED". (Electronic Thesis or Dissertation). Retrieved from


Professional Activities

  • Serving as Reviwer for:
    • Peer Journal of Computer Science (PeerJ), 2021;
    • The Fifth International Conference on Economic and Business Management (FEBM), 2020;
  • Serving as External Reviwer for:
    • The 44th International ACM SIGIR Conference on Research and Development in Information Retrieval (SIGIR), 2021;
    • International Conference on Web Search and Data Mining (WSDM), 2021;
    • ACM Conference on Information and Knowledge Management (CIKM), 2020;
    • 23rd International Conference on Extending Database Technology (EDBT), 2020;
    • IEEE International Conference on Big Data, 2019;
    • International Conference on Very Large Data Bases (VLDB), 2019;
    • IEEE International Conference on Big Data, 2018;
    • ACM Conference on Information and Knowledge Management (CIKM), 2018;
    • Asia-Pacific Web and Web-Age Information Management Joint International Conference on Web and Big Data (APWeb-WAIM), 2018;
    • International Conference on Database Systems for Advanced Applications (DASFAA), 2018;
    • International Conference on Web Information Systems Engineering (WISE), 2018;
  • Serving as Mentor for:
  • Serving as Volunteer for: