World's Best Scientists 2026 revealed!
Alexander Thomasian

Alexander Thomasian

D-Index & Metrics

Computer Science

D-Index
32
Citations
4506
World Ranking
13157
National Ranking
5284

Research.com Recognitions

  • 2000 - IEEE Fellow For fundamental contributions to the design and analysis of concurrency control methods for centralized and distributed database systems and performance analysis of computer systems.

Overview

Alexander Thomasian is affiliated with IBM in the United States and works primarily in the field of Computer Science, with a focus also on Decision Sciences. Their research spans several subfields including Computer Networks and Communications, Hardware and Architecture, Artificial Intelligence, Management Science and Operations Research, and Signal Processing.

Thematically, Thomasian's work is concentrated on topics such as Advanced Data Storage Technologies, Distributed and Parallel Computing Systems, Distributed Systems and Fault Tolerance, Parallel Computing and Optimization Techniques, Data Management and Algorithms, Simulation Techniques and Applications, and Advanced Database Systems and Queries.

Thomasian has published extensively, with notable papers including:

  • Storage Systems: Organization, Performance, Coding, Reliability, and Their Data Processing, 1st Edition, October 13, 2021, published in 2024 in the ACM SIGKDD Explorations Newsletter
  • Optimizing Apportionment of Redundancies in Hierarchical RAID, 2022, published in arXiv (Cornell University)
  • RAID Organizations for Improved Reliability and Performance: A Not Entirely Unbiased Tutorial, 2023, published in arXiv (Cornell University)
  • Dimensionality Reduced Clustered Data and Order Partition and Stepwise Dimensionality Increasing Indices, 2024, published in arXiv (Cornell University)
  • RAID Organizations for Improved Reliability and Performance: A Not Entirely Unbiased Tutorial (1st revision), 2024, published in arXiv (Cornell University)

Frequent venues for their publications include arXiv (Cornell University), which has hosted six of their papers, as well as the ACM SIGKDD Explorations Newsletter.

Alexander Thomasian's research addresses areas related to concurrency control methods, performance analysis, and reliability in computer systems. Their work integrates elements of computer architecture and network communications with operations research methodologies.

In recognition of their scientific contributions, Thomasian was named an IEEE Fellow in 2000 for fundamental contributions to the design and analysis of concurrency control methods for centralized and distributed database systems and performance analysis of computer systems.

Best Publications

  • Multidimensional data clustering and dimension reduction for indexing and searching

    Vittorio Castelli;Chung-Sheng Li;Alexander Thamasian

  • Searching multidimensional indexes using associated clustering and dimension reduction information

    Vittorio Castelli;Chung-Sheng Li;Alexander Thomasian

  • Concurrency control: methods, performance, and analysis

    Alexander Thomasian

  • RAID5 performance with distributed sparing

    A. Thomasian;Jai Menon

  • Analysis of Fork/Join and Related Queueing Systems

    Alexander Thomasian

  • Concurrency control for high contention environments

    Peter A. Franaszek;John T. Robinson;Alexander Thomasian

  • Two-phase locking performance and its thrashing behavior

    Alexander Thomasian

  • CSVD: clustering and singular value decomposition for approximate similarity search in high-dimensional spaces

    V. Castelli;A. Thomasian;Chung-Sheng Li

  • Performance analysis of two-phase locking

    A. Thomasian;I.K. Ryu

  • A GRASP algorithm for the multi-objective knapsack problem

    A. Thomasian;C. Han;G. Fu;C. Liu

  • Higher reliability redundant disk arrays: Organization, operation, and coding

    Alexander Thomasian;Mario Blaum

  • Distributed optimistic concurrency control methods for high performance transaction processing

    A. Thomasian

  • Analysis of database performance with dynamic locking

    In Kyung Ryu;Alexander Thomasian

  • Performance analysis of RAIDS disk arrays with a vacationing server model for rebuild mode operation

    A. Thomasian;J. Menon

  • A decomposition solution to the queueing network model of the centralized DBMS with static locking

    Alexander Thomasian;In Kyung Ryu

  • Clustering and singular value decomposition for approximate indexing in high dimensional spaces

    Alexander Thomasian;Vittorio Castelli;Chung-Sheng Li

  • Raid level 5 with free blocks parity cache

    Peter Anthony Franaszek;John Timothy Robinson;Alexander Thomasian

  • Mirrored Disk Organization Reliability Analysis

    A. Thomasian;M. Blaum

  • Access invariance and its use in high contention environments

    P.A. Franaszek;J.T. Robinson;A. Thomasian

  • Performance limits of two-phase locking

    A. Thomasian

Frequent Co-Authors

Vittorio Castelli
Vittorio Castelli IBM (United States)
Chung-Sheng Li
Chung-Sheng Li PricewaterhouseCoopers (United Kingdom)
Erhard Rahm
Erhard Rahm Leipzig University
Daniel M. Dias
Daniel M. Dias IBM (United States)
John R. Smith
John R. Smith IBM (United States)
Jayant R. Haritsa
Jayant R. Haritsa Indian Institute of Science
Asser N. Tantawi
Asser N. Tantawi IBM (United States)
Leana Golubchik
Leana Golubchik University of Southern California
Gregory E. Glass
Gregory E. Glass University of Florida
Jonathan A. Patz
Jonathan A. Patz University of Wisconsin–Madison

If you think any of the details on this page are incorrect, let us know.

Report an issue

We appreciate your kind effort to assist us to improve this page, it would be helpful providing us with as much detail as possible in the text box below:

Related Online Degrees & Career Pathways

Studying Computer Science in the USA opens doors to diverse online degrees and career opportunities in related STEM fields. Those interested in leveraging technology for environmental impact may also want to explore what jobs can you get with an environmental science degree. Careers in this area can range from environmental data analyst to sustainability consultant, combining technical knowledge with a passion for solving ecological challenges.

If flexibility is a priority, consider pursuing an online computer science degree. Many universities offer accelerated programs online, which can help you earn your degree faster without compromising on quality. Additionally, for those drawn to design, innovation, and engineering principles, you can look at the online mechanical engineering degree pathway, which covers robotics, manufacturing, and more.

For students seeking to make a broader environmental impact through engineering, pursuing environmental engineering degrees online is an ideal option. Online degree programs across these disciplines offer high flexibility, affordability, and access to in-demand career fields—delivering practical pathways to impactful STEM careers.

Best Scientists Citing Alexander Thomasian

Trending Scientists

Recently Published Articles