The interaction between geogrid/wire fabric reinforcement and fill material in reinforced earth walls, as well as its quantification, is a complex problem that depends on a number of factors. This paper presents and discusses state of the art related to numerical simulations of pull-out tests used for investigation of interaction between cohesionless fill and reinforcement. In addition, the results of a specially designed group of numerical simulations are presented and compared with recommendations of American and European standards related to such experiments.

The total excellence of university teaching largely depends on pedagogical and didactical­methodical competencies of university professors. The development and promotion of academic teaching is enabled by the modernization of the teaching process which does not encompass only modernization of curriculum but the entire didactical­methodical organization of teaching. Pleasure and requirements of students are to be accentuated accordingly, as well as competencies of teachers and expectations of labor market. The purpose of this paper is to establish which element of didactical­methodical organization of university teaching is the most important dimension of excellence of teaching as well as in what way university professors perform self­evaluation of the excellence of didactical­methodical organization of teaching at the University of Tuzla. The analytical­descriptive survey method was used as a variant of analytical­descriptive method as well as procedures of analysis of contents and polling. It is supposed that there is statistically significant difference in self­evaluation of the importance of elements of excellence in didactical­methodical organization of teaching at the University of Tuzla and that self­evaluations of the importance of individual elements of excellence of university teaching differ with regard to age, sex, teaching/academic title, years of experience in academic institutions and scientific field the faculty belongs to. The results of this research show that the excellence of planning and preparation and excellence in choice of teaching methods are the most important elements of excellence in the organization of university teaching, and that 90% of teaching personnel evaluates that the classes they organize are at very high level of excellence.

Ukupna izvrsnost sveučilišne nastave najviše ovisi o pedagoškim i didaktičko­metodičkim kompetencijama sveučilišnih nastavnika. Za razvoj i unaprjeđenje sveučilišne nastave važno je osuvremenjivanje nastavnog procesa koje ne podrazumijeva samo osuvremenjivanje kurikula, nego cjelokupnoga didaktičko­metodičkog organiziranja nastavnoga rada. Pritom je potrebno naglasiti zadovoljstvo i potrebe studenata, kompetencije visokoškolskih nastavnika i očekivanja radnog tržišta. Cilj ovoga rada bio je ustvrditi koja je sastavnica didaktičko­metodičkog organiziranja sveučilišne nastave najvažniji čimbenik izvrsnosti nastavnog rada te kako sveučilišni nastavnici Univerziteta u Tuzli vrjednuju vlastitu izvrsnost didaktičko­metodičkog organiziranja nastavnog rada. Koristilo se analitičko­deskriptivnim upitnikom kao inačicom analitičko­deskriptivne metode, postupcima analize sadržaja i anketiranjem. Pretpostavljeno je kako postoji statistički značajna razlika u samovrjednovanju važnosti čimbenika izvrsnosti didaktičko­metodičke organizacije nastavnog rada visokoškolskih nastavnika Univerziteta u Tuzli te da se samovrjednovanja važnosti pojedinih čimbenika izvrsnosti sveučilišne nastave razlikuju s obzirom na dob, spol, znanstveno­nastavno/umjetničko zvanje, godine radnog iskustva u visokoškolskim ustanovama te znanstveno područje kojemu Fakultet pripada. Rezultati istraživanja pokazali su kako su izvrsnost planiranja i pripremanja te izvrsnost izbora nastavnih metoda najvažniji čimbenici ukupne izvrsnosti organiziranja sveučilišne nastave, a 90 % nastavnog osoblja ocjenjuje kako je nastava koju organiziraju visoke razine izvrsnosti.

The position of regional geography in the system of geographical sciences is a topic that has been the subject of intense epistemologically and methodologically focused discussion within scientific realm at the global level since the middle of the 20th century. The initial outcome of these processes at the academic level was the marginalization of regional geography in the study of spatial phenomena, but since then there was a partial revitalization of the regional approach. In view of these changes, the place of regional geography within geographical education also began to be problematized. In this paper, it is conducted a critical review of selected academic articles from the last few decades that at least in a certain segment touch on this topic, as well as analysis of recent trends in school geography. This analysis suggests that it is difficult to find an adequate replacement for regional content, especially in the geographical education at lower levels of education, and that in many countries it still represents the basis or at least an important part of the geographical curriculum. However, at the same time, the need for change of teaching approach based on the excessive so-called regional inventory of space, by introducing general geographical concepts in the study of regional units of various levels, and putting them in the service of the development of critical thinking in students.

Cationic NLCs represent lipid vesicles bearing cationic lipids on its surface, which leads to electrostatic interactions with negative charges of the nucleic acids such as miRNA and formation of a complex which protect the nucleic acids from the inevitable physicochemical biological impacts within the blood circulation [1]. This study aimed to develop cNLCs in order to obtain the most suitable formulation for further delivery of miRNAs.

Oil-in-water cationic nanoemulsions (CNE) are fine dispersions consisting of an oil core (from natural or synthetic origin) stabilized by a single cationic lipid or a mixture with phospholipids, non-ionic surfactants, and/or PEG-lipids. CNEs are considered to be suitable and potential delivery system for nucleic acids in gene therapy field due to their positively charged surface which complex with negatively charged gene material through electrostatic interactions [1]. The aim of the present study was to evaluate the effect of cationic lipid-sterylamine (SA) on mean droplet size, zeta potential and pH of the CNEs. Formulations containing various concentrations of SA were prepared on high-pressure homogenizer. The mean droplet size and zeta potential of the emulsions were determined by photon correlation spectroscopy and electrophoretic light scattering, respectively (Malvern NanoZs Zetasizer). The mean droplet size of emulsions varied from 126 to 129 nm while the polydispersity index varied from 0,068 to 0,137. As expected, zeta-potential increased from +43,7 mV to +53,7 mV with the SA concentration increase from 0,25 to 0,75 % (w/w). During the 60-day storage period at 25 °C, the droplets stayed in the nanometer range with only a minor size increase (~10 nm), no significant changes in droplet size distribution nor zeta potential or any difference in their visual appearance (no creaming or phase separation) proving therefore a satisfactory formulation stability.