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Production of high quality milk, milk containing low number of bacteria (several thousand to lt 141 000 cells/ml of milk) and low number of somatic cells count (SČ), is the target of Program of control and prevention of mastitis in dairy cows. Program of mastitis control must provide diagnostic tests for evaluation of udder infections by enviromental microorganizams and prevention of new intramammarian infections (IMI). The evidence is presented that longterm, intensive program of teat désinfection after milking and therapy of dryed cows are procedures which are enabling significant decrease of SČ and number of bacteria in 1 ml of milk. Clinical changes of udder are offtenly caused by Corynebacterium bovis, Streptococcus sp. and Staphylococcus sp. which are also responsible for increasment of SČ and IMI cases. Knowing that most of mastitisies are subclinical by character, than it is understandable that various IMI of dairy cows are appearing after usage of the various antiseptics. We have been using accessory remedy for dry milking VETER-D, for prevention of sub-clinical mastitisies, "dry" milking and evaluation of IMI spreadness in udder health ma-nagment program, on 403 dairy cows. Cilj programa i kontrole i suzbijanja mastitisa kod muznih krava je proizvodnja mleka visokog kvaliteta, tj. mleka koje će sadržati mali broj bakterija (od nekoliko hiljada do = 141 000 ćelija/ml mleka) i somatskih ćelija. Program kontrole mastitisa trebalo bi da ima kontrolu infekcija vimena sa organizmima sredine i efikasan sistem praćenja i sprečavanja novih intramamarnih infekcija vimena (MI). Postoje dokazi da dugoročni intenzivni programi dezinfekcije sisa posle muže i terapija zasušenih krava mogu izrazito da smanje broj SČ i bakterija u 1 ml mleka. Kliničke promene na vimenu najčešće izazivaju Corynebacterium bovis, streptokoke i stafiloke i to su faktori koji najviše povećavaju SČ i intramamarne infekcije. Budući daje većina mastitisa subklinička, postoji različit broj intramamarnih infekcija (IMI) vimena muznih krava posle dezinfekcije sisa sa različitim antisepticima. Mi smo upotrbljavaîi pomoćno lekovito sredstvo VETER-D za suzbijanje subkliniČkih mastitisa, "suvu" mužu i ispitivanje rasprostranjenosti IMI u menadžerskom programu zdravlja vimena, na 403 krave.

CoLaB Tutor and AC-ware Tutor are Intelligent Tutoring Systems (ITSs) that are based on concept-based learning and are notable due to the fact they are relatively easy to generalize to multiple knowledge domains. In this research study we investigate the performance of CoLaB Tutor, AC-ware Tutor, and Moodle in a blended learning environment for an introductory computer programming course. In our study, regular face-to-face lectures and laboratory exercises were complemented with online learning at the students’ own pace, time and location. Our study revealed that CoLaB Tutor students had moder- ately higher knowledge gains than those students in the AC-ware and Moodle groups. The prediction of student success (pass/fail) for a basic knowledge post- test revealed an overall classification rate of 73, 5% for the CoLaB Tutor group (completed knowledge and online score as predictors), 71, 4% for the AC-ware group (completed knowledge as predictor) and 70% for the Moodle group (time spent online as predictor). Additionally, students that used ITSs on average passed through more knowledge online than students that used LMS, while students that used LMS on average spent more time online.

We present results of empirical evaluation of intelligent tutoring systems (ITS) with ontological domain knowledge representation. This research was done as a first step in the process of developing a new model of intelligent tutoring system that will include all the characteristics of evaluated systems: adaptive content, communication based on controlled natural language, graphical presentation of ontological domain knowledge representation. The case study results revealed extraordinary effectiveness of evaluated adaptive intelligent tutoring systems when compared with traditional learning and teaching process.