13 citations · 15 across the 5 of their papers we have counts for
7 papers
Exceeding Information Targets in Fixed-Form Test Assembly
Ivan Gospodinov, Emira Karaibrahimova, Stefan M. Filipov
This work studies the assembly of ability estimation test forms (called tests, for short) drawn from an item bank. The goal of fixed-from test assembly is to generate a large numbe…
The linearization methods as a basis to derive the relaxation and the shooting methods
István Faragó, Stefan M. Filipov
This chapter investigates numerical solution of nonlinear two-point boundary value problems. It establishes a connection between three important, seemingly unrelated, classes of it…
Implicit Euler time discretization and FDM with Newton method in nonlinear heat transfer modeling
Stefan M Filipov, István Faragó
This paper considers one-dimensional heat transfer in a media with temperature-dependent thermal conductivity. To model the transient behavior of the system, we solve numerically t…
NUCLEON-2 Mission for the investigation of heavy cosmic rays nuclei
V. Bulatov, S. Filipov, D. Karmanov +10
The NUCLEON-2 experiment is aimed at the investigation of isotope and charge composition of ions from carbon up to trans-uranium elements in the energy range over about a hundred M…
Constrained similarity of 2-D trajectories by minimizing the H1 semi-norm of the trajectory difference
Stefan M. Filipov, Ivan D. Gospodinov
This paper defines constrained functional similarity between 2-D trajectories via minimizing the H1 semi-norm of the difference between the trajectories. An exact general solution…
Meeting an absolute test information target with optimal number of test items via Grand Canonical Monte Carlo simulation
Stefan M. F|ilipov, Ivan D. Gospodinov
This work studies IRT-based Automated Test Assembly (ATA) of multiple test forms (tests) that meet an absolute target information function, i.e. selecting from an item bank only th…
Shooting-Projection Method for Two-Point Boundary Value Problems
Stefan M. Filipov, Ivan D. Gospodinov, Istvan Farago
This paper presents a novel shooting method for solving two-point boundary value problems for second order ordinary differential equations. The method works as follows: first, a gu…