Scientific Bulletin of Chełm:

1. Basic algorithms for QRS complexes detection in ECG signal; 2. On certain applications of calculus of variations to the problem of inflation and unemployment; 3. The lack the mathematical maturity as a reason of difficulties in learning and using mathematics; 4. Diverse approaches to the bifuzzy sets; 5. Graded transivity and aggregation processes; 6. Some extremal problems in a certain class of analytic functions; 7. Induction of Decision Rules from Incomplete Data by Modified LEM2 Algorithms; 8. On the probability theory on D- lattices; 9. Radius problems connected with starlikeness for certain families of holomorphic functions defined by subordination; 10. A new proof of the some fixed point theorem for multivalued mappings; 11. On differentiating the curriculum in applied statistics; 12. Fuzzy Relation Equations of type max- * for Łukasiewicz conjunction; 13. Questions in mathematical education; 14. Equivalent matrices over lattices; 15. Degenerate nonlinear optimization problems via p- regularity theory; 16. Strructure of idempotent uninorms; 17. CHA- ID and the Logit procedures: two complementary statistical techniques in Market Segmentation; 18. Theoretical- set operations and procedures with conjucterms of boolean functions; 19. Fractal as a chaotic dynamical system- Barnsley' s construction; 20. New theorem on instability of difference equations in linear approximation; 21. The influence of economic factors on the trial exam results; 22. Jerzy Józef Trocki (1944-2006); 23. Applicability of mathematical in theoretical physics; 24. Circular annuli; 25. Mathematical Biology- modeling based on diffusion process; 26. On some classes of analytic functions related to star- like functions with m- fold symmetry; 27. Quantifiers in the proof; 28. Egzamin testowy- alternatywna forma sprawdzania wiedzy matematycznej studentów; 29. Numerical solution of the problem of giving waterside structure foundation strenght; 30. Density topologies; 31. Selected economic applications of entropy; 32. In searching the number PI; 33. Sensitivity analysis for the Black- Schoes Option Pricing Model; 34. Adam Bielecki- matematyk, nauczyciel, humanista; 35. Skill based routing in call centers- analysis and simulation.