Stefan Andjelkovic

Stefan Andjelkovic

I'm a 5th year PhD student in joint Carnegie Mellon University and University of Pittsburgh PhD program in Computational Biology

Posts by Collection

publications

Participation of Serbia at the International Olympiads in Astronomy and Astrophysics in 2012 and 2013

Published in 17th National Conference of Astronomers of Serbia, 2017

The topic is the participation of contestants from Serbia in international contests in astronomy: 6th IOAA in Brazil 2012, 7th IOAA in Greece 2013 and the Saint-Petersburg Olympiad in 2013. Also, organisation and preparations of contestants, volunteer work of trainers and financial problems. Contribution of Mathematical Gymnasium in Belgrade. A presentation of contests within Serbia, which serve for the purpose of selecting contestants for international contests. Organisation and events during international contests, as well as the success of Serbian contestants.

Recommended citation: Vidojevic, S., Ninkovic, S., Andjelkovic, S., Šarkovic, V., Zivanovic, F., Simonovic, B., & Badza, S. (2017). Participation of Serbia at the International Olympiads in Astronomy and Astrophysics in 2012 and 2013. Publ. Astron. Obs. Belgrade, 96, 529-532. https://publications.aob.rs/96/pdf/529-532.pdf

DiSH-trend: Intervention Modeling Simulator That Accounts for Trend Influences

Published in Winter Simulation Conference 2021, 2021

Simulation on directed graphs is an important method for understanding the dynamics in the systems where connectivity graphs contain cycles. Discrete Stochastic Heterogeneous Simulator (DiSH) is one of the simulation tools with wide application, which uses regulator values to calculate state updates of regulated elements. Here we present a new simulation approach DiSH-trend which also takes into account the trends in regulating elements. We demonstrate the features of trend-based regulation, as well as hybrid regulation, which is a combination of the trend- and level-based approaches. The modeling capabilities are demonstrated on a small toy model, showcasing different functionalities. Real-world capabilities are demonstrated on a larger network model of food insecurity in the Ethiopian region Oromia. Adding trend-based regulation to models results in increased modeling flexibility, and hybrid regulation improves qualitative dynamic behavior prediction. With appropriate data, DiSH-trend becomes a powerful tool for exploring intervention strategies.

Recommended citation: Andjelkovic, S., & Miskov-Zivanov, N. (2021). DiSH-trend: Intervention Modeling Simulator That Accounts for Trend Influences. arXiv preprint arXiv:2107.01302. https://arxiv.org/abs/2107.01302

talks

DiSH-trend: Intervention Modeling Simulator that Accounts for Trend Influences

Published:

Abstract: “Simulation on directed graphs is an important method for understanding the dynamics in the systems where connectivity graphs contain cycles. Discrete Stochastic Heterogeneous Simulator (DiSH) is one of the simulation tools with wide application, which uses regulator values to calculate state updates of regulated elements. Here we present a new simulation approach DiSH-trend which also takes into account the trends in regulating elements. We demonstrate the features of trend-based regulation, as well as hybrid regulation, which is a combination of the trend- and level-based approaches. The modeling capabilities are demonstrated on a small toy model, showcasing different functionalities. Real-world capabilities are demonstrated on a larger network model of food insecurity in the Ethiopian region Oromia. Adding trend-based regulation to models results in increased modeling flexibility, and hybrid regulation improves qualitative dynamic behavior prediction. With appropriate data, DiSH-trend becomes a powerful tool for exploring intervention strategies.”

Astrobiological simulation: Make your own galaxy!

Published:

This talk with code along session was part of TechNights, an outreach program at Carnegie Mellon University, School of Computer Science, aimed at middle school students to promote diversity in STEM. The recording is available here. The slide deck is available here

teaching

NAOC Astronomy Lectures

Advanced class, National Astronomical Olympic Committee of Serbia, 2012

Teaching advanced (competitive) astronomy to the high school students.

PSC Astronomy Seminar

Science camp, Petnica Science Center, Astronomy Dept., 2013

Teaching astronomy and supervision of high school students’ research projects

PSC Physics Seminar

Science camp, Petnica Science Center, Physics Dept., 2016

Teaching advanced physics and supervision of high school students’ research projects.

CMPBIO/MSCBIO 2040: Cell & Systems Modeling

Graduate course, University of Pittsburgh, Computational and Systems Biology Department, 2020

This course introduces students to the theory and practice of modeling biological systems from the molecular to the population level with an emphasis on intracellular processes. Topics covered include kinetic and equilibrium descriptions of biological processes, systematic approaches to model building and parameter estimation, analysis of biochemical circuits modeled as differential equations, modeling the effects of noise using stochastic methods. A range of biological models and applications are considered including gene regulatory networks cell signaling, molecular motors, and developmental biology.