Radu Mariescu-Istodor

Postdoctoral Researcher
University of Eastern Finland



Address:
University of Eastern Finland
School of Computing
Office TB341, Science Park
Joensuu, Finland

Phone:
+358-(0)417517773

Email:


Machine Learning Group

Updated 17.9.2018

Publications

Journal Articles

  1. R. Mariescu-Istodor, Abu S. M. Sayem and P. Fränti, "Activity event recommendation and attendance prediction", Journal of Location Based Services, 13(4), 293-319, 2019. IF=1.36

  2. L. Tuță, I. Nicolaescu, R. Mariescu-Istodor and A. Digulescu-Popescu, "A Principal Component Analysis (PCA) Based Method for Shape Extraction", Journal of Military Technology, 2(2), 2019.

  3. L. Sengupta, R. Mariescu-Istodor and P. Fränti, "Which local search operator works best for the open loop TSP?", Journal of Applied Sciences, 9(19), 3985, 2019.

  4. J. Yang, R. Mariescu-Istodor and P. Fränti, "Three rapid methods for averaging GPS segments", Journal of Applied Sciences, 9(22), 4899, 2019.

  5. N. Gali, R. Mariescu-Istodor, D. Hostettler and P. Fränti, "Framework for syntactic string similarity measures", Expert Systems with Applications 129 : 169-185, 2019. IF=5.45

  6. L. Sengupta, R. Mariescu-Istodor and P. Fränti, "Planning Your Route: Where to Start?", Computational brain & behavior 1, no. 3-4 : 252-265, 2018.

  7. R. Mariescu-Istodor and P. Fränti, "Cellnet: Inferring road networks from gps trajectories", ACM Trans. on Spatial Algorithms and Systems (TSAS) 4 (3), 8, 2018. IF=1.69

  8. R. Mariescu-Istodor and P. Fränti, "Grid-based method for GPS route analysis for retrieval", ACM Trans. on Spatial Algorithms and Systems 3 (3), July 2017. IF=1.69

  9. P. Fränti, R. Mariescu-Istodor and L. Sengupta, "O-Mopsi: mobile orienteering game for sightseeing, exercising and education", ACM Trans. on Multimedia, Computing, Communications, and Applications 13 (4), 56:1-25, August 2017. IF=2.25

  10. N. Gali, R. Mariescu-Istodor and P. Fränti, "Using linguistic features to automatically extract web page title", Expert Systems with Applications, 79, 296-312, 2017. IF=2.98

  11. M. I. Malinen, R. Mariescu-Istodor and P. Fränti, "K-means*: Clustering by Gradual Data Transformation", Pattern Recognition, 47 (10), 3376-3386, October 2014. IF=2.63

Refereed Conference Papers

  1. R. Mariescu-Istodor and I. Jormanainen, "Machine Learning for High School Students", Koli Calling International Conference on Computing Education Research, pp. 1-9, 2019.

  2. R. Mariescu-Istodor, R. Ungureanu and P. Fränti, "Real-time destination prediction for mobile users", Conf. on Location-based Services (LBS), Vienna, Austria, January 2019.

  3. P. Fränti, R. Mariescu-Istodor and K. Waga, "Similarity of Mobile Users Based on Sparse Location History", In International Conference on Artificial Intelligence and Soft Computing, pp. 593-603. Springer, Cham, 2018.

  4. R. Mariescu-Istodor and P. Fränti, "Detecting Location-Based User Actions", Conf. on Location-based Services (LBS), Zürich, Switzerland, January 2018.

  5. R. Mariescu-Istodor, P. Heng and P. Fränti, "Roundness measure for GPS routes", Conf. on Location-based Services (LBS), Zürich, Switzerland, January 2018.

  6. N. Gali, R. Mariescu-Istodor and P. Fränti, "Functional Classification of Websites", Int. Symposium on Information and Communication Technology (SoICT 2017), Nha Trang, Vietnam, 34-41, December 2017.

  7. N. Gali, R. Mariescu-Istodor, P. Fränti, "Similarity measures for title matching", IAPR Int. Conf. on Pattern Recognition, (ICPR'16), Cancun, Mexico, 1549-1554, December 2016.

  8. P. Fränti, R. Mariescu-Istodor, and C. Zhong, "XNN graph", Joint Int. Workshop on Structural, Syntactic, and Statistical Pattern Recognition (S+SSPR'16), Merida, Mexico, LNCS 10029, 207-217, November 2016.

  9. R. Mariescu-Istodor and P. Fränti, "Gesture input for GPS route search", Joint Int. Workshop on Structural, Syntactic, and Statistical Pattern Recognition (S+SSPR'16), Merida, Mexico, LNCS 10029, 439-449, November 2016.

  10. R. Mariescu-Istodor, A. Tabarcea, R. Saeidi and P. Fränti, "Low complexity spatial similarity measure of GPS trajectories", Int. Conf. on Web Information Systems & Technologies (WEBIST'14), Barcelona, Spain, April 2014.

  11. K. Waga, A. Tabarcea, R. Mariescu-Istodor and P. Fränti, "Real Time Access to Multiple GPS Tracks", Int. Conf. on Web Information Systems & Technologies (WEBIST'13), Aachen, Germany, May 2013.

  12. K. Waga, R. Mariescu-Istodor, A. Tabarcea, I. V. Makeev, T. A. Lepikhin and P. Fränti, "Modeling user profile by analyzing user activity in location-based system", In The XLIV annual international conference Control Processes and Stability (CPS'13), p. 23, May 2013.

  13. K. Waga, A. Tabarcea, R. Mariescu-Istodor and P. Fränti, "System for real time storage, retrieval and visualization of GPS tracks", Int. Conf. System Theory, Control and Computing (ICSTCC'12), Sinaia, Romania, Vol. 2, October 2012.

Submitted Manuscripts

  1. R. Mariescu-Istodor, M. Xie and P. Fränti, "Context-aware similarity of GPS trajectories", Journal of Location-based Services.

  2. R. Mariescu-Istodor and P. Fränti, "Estimating travel-cost using an Overhead Graph", Journal of Location-based Services.

  3. P. Fränti and R. Mariescu-Istodor "Averaging GPS Segments Competition", Pattern Recognition.

  4. R. Mariescu-Istodor, A. Cristian, M. Negrea and P. Cao "VRPDiv: A Divide and Conquer Framework for Large Vehicle Routing Problem Instances", ACM Trans. on Spatial Algorithms and Systems.

Teaching

  1. Design and Analysis of Algorithms (exercises)
    University of Eastern Finland, 2014, 2015, 2016, 2017.

  2. Location-Aware Mobile Applications Development
    University of Eastern Finland, spring 2018, autumn 2018, 2019.

  3. Location-Aware Machine Intelligence
    University of Eastern Finland, 2019

  4. Visual Web Development
    University of Eastern Finland, 2019.

  5. Here you can find some useful software development practices

Software, Data and Tools





















This is a collection of software I developed over the years. Some are educational tools and others are real applications or APIs that serve a practical purpose. The list also contains links to some datasets. More software exists as features in Mopsi.

The Web of Motivation


Everyone has difficulties sometimes when trying to accomplish goals. Here I teach you a trick I use to keep motivation levels high and increase the chance of success!

No Black-Box tutorials (!BB)


!BB is a series where I teach how to program complex applications without using any external libraries. In this first episode you will learn how machine learning works by building a web app (HTML and JavaScript) that can recognize objects using a camera. Check out the App here.

What I did during my PhD


Because more and more users have mobile devices with GPS, the amount of location-based information is becoming difficult to manage. Such information includes geo-tagged photos, service locations and routes. In the Thesis we present efficient methods for storing, searching and visualizing large trajectory collections. All the methods were implemented and tested in Mopsi.

CoronaVille: Learn about the coronavirus (Game)


CoronaVille is a game that teaches about fast spreading viruses. The objective is to remind people to move less by tapping on the screen. Further levels include power-ups like social distancing, masks and other surprises. Check out this promotional video or play the game here.

HackeRacer: Learn speed-coding (Game)


HackeRacer is a game where you can practice typing code fast. The objective is to type a given sequence of code as fast as possible and without mistakes. Typing well makes the cyclist pedal faster. Play the game here and make the cyclist go as far as possible!

Master Skier: Learn XC Skiing


This program teaches you all you need to know about cross-country skiing in Finland. If you're from Finland, you probably know these already, but, check it out anyway... It's funny!

Other Hobbies

  1. Long distance skiing, cycling and running

  2. Origami level*:
    Ancient Dragon by Satoshi Kamiya
    * = the most complicated model I folded
    I also invented the Every Crane series.

  3. Cooking Codes:
    Teaching algorithms through cooking.

  4. My YouTube channel:
    https://www.youtube.com/c/radumariescuistodor