Associate Professor of Computer Science and Engineering

Bio Contact FAQ (Ph.D. & MS) Job positions Research Teaching

Biographical Sketch

"Attitude is a little thing that makes a big difference."-- by Sir Winston Churchill


Office Hours Office Hours (Walk-In Also): Please contact the CSE department for scheduling (in-Person or via Zoom)


     Office Hours Tue (2 pm - 5 pm) & Wed (3:30 pm - 4:30 pm)



 Spring  2024 Semester (Current Semester)

CSCI 3453 CORE :   CSCI 3453: Operating System Concepts  (M/W 2-3:15 pm, NC 3207 

             - Text Book:  Operating System Concepts, A. Silberschatz, P. Gavin, and G. Gagne, 10th ed., Wiley , (ISBN: 978-1-119-32091-3)


CSCI 3453 Category A: CSCI 5573   (M/W 5-6:15 pm, LSC LW-844)

             - Text Book:Operating Systems: Three Easy Pieces, Remzi H. Arpaci-Dusseau and Andrea C. Arpaci-Dusseau 


Upcoming Semester (Fall 2024):

CSC3453 CSCI 4800/5799: Cloud Computing, M/W 2-3:15 pm 
CSC4591 CSCI 5765 (Category B - Cybersecurity Certificate): Computer Networks, MW 5:-6:15 pm  

Previous Courses Previous Courses:

CSC3453 CSCI 3453: Operating System Concepts
CSC4591 CSCI 4591: Computer Architecture
CSC4739 CSCI 4739: Senior Design Projects
CSC4761 CSCI 4761: Introduction to Computer Networks
CSC5765 CSCI 5765/7765: Computer Networks
CSC5559 CSCI 5559: Database Systems
CSC5573 CSCI 5573: Operating Systems
CSC5799 CSCI 5799/7799: Topics in Networked Computing (previously High performance network based computing)
CSC5803 CSCI 5803: Special topics in Cluster Computing


"Ever Tried, Ever Failed. No Matter. Try Again. Fail Again, Fail Better" -- by Samuel Beckett

"Only Those Who dare to Fail greatly can Achieve Greatly" -- by Robert. F. Kennedy

"Our Greatest Glory is not in Never Failing, but in Rising Every time we Fall" -- by Confucius

Research Lab (Distributed Computing and Networking)

Current Projects

Auto-scaling of micro-services for real-time applications in cloud computing environment

Reliable and efficient protocols for supporting streaming multimedia applications over named data network (NDN) over Cloud Edge Network

Real-time disaster detection and management system based on social media over clouding computing environment

Past Projects

CSC3453 Web-based Hospital Computerized Disaster Information and Management System (CDIMS): develop a novel web service based Computerized Disaster Information and Management System (CDIMS) to direct disaster management by hospitals. CDIMS will assist with disaster preparation as well as command and communications during a disaster. This project is funded by NIH (with Drs. Little and Ward-Gaines, Grant number: 1G08LM009710-01, May 2008-May 2011)
CSC3453 Development of Parallel Computing Environment of Huge Data Processing : Developing parallel data link level simulator. Funded by Electronics and Telecommunications Research Institute (ETRI) , Dajeon, South Korea.
CSC3453 Adaptive Computing Environments for high-performance distributed applications over Grid (ADViCE): A web-based parallel and distributed computing environment that allows users to develop large scale parallel and distributed applications using libraries of parallel/distributed function modules and run them across the networks over Grid Computing Environment.
CSC3453 Peer-to-Peer distributed storage system : Developing an intelligent P2P file storage system which allows users to store and retrieve their data at any nodes which may be very secure nodes or un-secure nodes without worry about the security and reliability of their stored data.
CSC3453 Peer-to-Peer messaging system : Developing an JXTA based message passing system for P2P applications.
Adaptive Communication Systems (ACS) : ACS is an adaptive high performance message-passing system that provides programmable communication, control and management services to meet the Quality of Service (QoS) requirements of applications. In addition, developed analytical performance models for adaptive group communication services that are aware of network and computing resources and application requirements.

Recent Selected Publications (Since 2018)


H. Nguyen, I. Ra ,Location based Data-centric Forwarding for Mobile Ad-hoc Networks, IEEE The 26th International Confernce on Advanced Communicatios Techologies, Feb. 04-07, 2024, Pyeongchang, Korea (Outstaning paper award ).


V. Widartha, I. Ra, S. Lee, and C. Kim, Advance Smart Lighting: A Developmental Approach to Energy Efficiency through Brightness Adjustment Strategues, J. of Low Power Electornics and Applications, January 2024, Vol 14, No 1. https://doi.org/10.3390/jlpea14010006


B. Kim, M. Jang, and I. Ra , Effect of Fan Systems for Lowering Leaf Temperature of Korean Ginseng, The 15th International Conference on Internet (ICONI 2023), Dec. 17-20, 2023, Hochiminh, Vietnam.


A. Abdel Khaleq and I. Ra, Intelligent microservices autoscaling module using reinforcement learning, Cluster Computing, April 2023, pp. s10586-s10595, DOI: https://doi.org/10.1007/s10586-023-03999-8


A. Abdel Khaleq and I. Ra, Intelligent Autoscaling of Microservices in the Cloud For Real-Time Applications, IEEE Access, Vol. 9, pp. 35464-35476, 2021.


S. Xiaorui, L. Wang, CS Kim, I. Ra, Fault Diagnosis of Bearing Based on Convolutional Neural Network Using Multi-Domain Features, KSII Transactions on Internet and Information Systems, Vol. 15, No. 5, pp. 1610--1629, May 2021. DOI:10.3837/tiis.2021.05.002.


T. Augustine, H. Jafarian, and I. Ra, Synergy of Accreditations and CAE Designation, Journal of the Colloquium for Information System Security and Education , pp. 52-58, Vol. 7, No. 1, Summer 2020.


K. Lee, I. Ra, Data Privacy-Preserving Distributed Knowledge Discovery based on the Blockchain, Information Technology and Management, Vol 21, No. 3, October 2020, https://doi-org.aurarialibrary.idm.oclc.org/10.1007/s10799-020-00317-1


A. Abdel Khaleq and I. Ra, Twitter Analytics for Disaster Relevance and Disaster Phase Discovery, IEEE  2018 Future Technologies Conference  (FTC), Vancouver, BC, Canada, November 13-14, 2018.


Y. Choi, I. Ra, S. Lee, Asynchronous Reasoning Scheme For Global Ontology Management In Internet of Things Information Systems: ASYNCR*/GOM, J. of Theoretical and Applied Information Technology, Vol. 96, No. 21, November 2018, pp. 7309--7317.


Y. Jeon, I. Ra, Y. Park, S. Lee, Machine Learning Optimization of Parameters for Noise Estimation, Journal of Universal Computer Science, Vol. 24, No. 9, September 2018, pp. 1271--1281.


A. Abdel Khaleq and I. Ra,Cloud-based Disaster Management as a Service: A Micro-service Approach for Hurricane Twitter Data Analysis, IEEE Global Humanitarian Technology Conference, San Jose, CA, October 18-21, 2018


H. Nguyen, A. Lee, I. Ra , Network-assisted HTTP Adaptive Streaming for Hybrid Software Defined Network, ACM Research in Adaptive and Convergent Systems, Honolulu, HI, October 9-12, 2018.


A. Lee, X. Wang, H. Nguyen, and I. Ra, A Hybrid Software Defined Networking Architecture for Next-Generation IoTs, KSII Transactions on Internet and Information Systems, Vol. 12, No. 2, pp. 932 – 945, February 2018.

News (Job Positions)
  • T.B.A

Prospective Ph.D. Students

  • I am looking for diligent and talented Ph.D. students who are interested in distributed computing or computer networks. Please check my current research activities and publications. If you'd like to work with me, please email me your resume. Thank you.

Prospective and Current MS students


  • Email: ilkyeun dot ra at ucdenver dot edu
  • Office: Lawrence Street  Center (LSC) 8th FL, LW-804
  • Phone: +1-303-315-1406
  • Fax: +1-303-315-1410
  • Address:  
    University of Colorado Denver
    Dept. of Computer Science & Eng.
    P.O. Box 173364
    Campus Box 109
    Denver, Colorado 80217-3364
  • Address for Overnight Delivery:  
    1380 Lawrence Street, Ste. 800
    University of Colorado Denver

    Denver, Colorado 80204 U.S.A.


(Updated Feb. 2024)