The gully of Potovošća on the island of Krk – The effects of a short-term rainfall event

The rainfall event during the night of 10th–11th September 2007 caused strong erosion in the gully of Potovošća on the Island of Krk. In the main fan, two new gullies and two fans were formed. Those morphological changes have been mapped, measured and explained, across the drainage basin in terms of topography and precipitation intensity. The drainage basin morphology was studied using GIS that allowed comparison of morphological and dynamic relationships within the study area. In order to obtain the relative potential erosion intensity between different points in the basin, as well as to differentiate areas with areal (diffuse) erosion from those with dominant linear erosion, the Stream Power Index (SPI) was calculated. The drainage basin specific properties were further related to the event specific properties, precipitation intensity and hydrologic estimations. The rainfall intensities obtained, allow the calculation of discharge at the gully mouth and the definition of recurrent periods using the rational method. The rainfall-runoff event studied was also influenced by the relatively high Antecedent Precipitation Index (API). This allows explanation of the morphological consequences of the short-term event. Consequently the interrelationship between short-term and long-term events has been discussed. In addition, the physiography of the gully has been recently modified by human interference, which has also influenced the morphological consequences of the aforementioned short-term rainfall event.</p

Marko Zečević. 2017. Uvod u vojnu geologiju. Zagreb, Hrvatsko vojno učilište „Dr. Franjo Tuđman”. 57 str.

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Digital analysis of the slopes of Rab Island

U radu su analizirana morfometrijska obilježja padina otoka Raba. Na temelju formiranoga digitalnog modela reljefa izračunati su rasterski slojevi vrijednosti nagiba, ekspozicije i zakrivljenosti padina, te dolinska mreža koja je grupirana prema metodi Strahela. U GIS okružju provedena je međusobna analiza izračunatih vrijednosti morfometrijskih parametara. Prostorni raspored vrijednosti pojedinih morfometrijskih parametara doveden je u vezu sa strukturnim i morfogenetskim obilježjima otoka Raba. Utvrđene su razlike obilježja padina unutar pojedinih morfogenetskih tipova reljefa, kako na temelju samih morfometrijskih obilježja, tako i analizom dolinske mreže.The paper analyzes morphometric features of the slopes of Rab Island. Based on the digital elevation model, raster layers were calculated for the values of slope angle, aspect and curvature, as well as valley network, which was grouped using the Strahler method. A comparative analysis of the calculated values of morphometric parameters was conducted in the GIS environment. Spatial distribution of the values of each of the morphometric parameters was correlated to the structural and morphogenetic features of Rab Island. Differences between the slopes features within each of the morphogenetic types of the terrain were ascertained by comparing their morphometric features, and by using the valley network analysis

Spatial Distribution and Density of Dolines in the NW Part of Velika Kapela from GIS Based Buffer Analysis

Primjenom metoda GIS-a temeljenih na analizi susjedstva promatran je prostorni raspored i gustoća ponikava u SZ dijelu Velike Kapele. Rezultati dobiveni analizom formiranih prostornih baza podataka ukazuju na prostorni raspored pukotina odnosno rasjeda, ali i intenzitet veze između pružanja i gustoće ponikava, te utvrđenih lineamenata. Usporedbom rasjeda određenih temeljem analize ponikava, sa rasjedima vidljivih na digitalnom modelu reljefa (DEM), te rasjedima uočenim terenskim kartiranjem određene su temeljne tektonske cjeline, odnosno tektonski blokovi unutar istraživanog područja. Veći regionalni i lokalni rasjedi determinirani na digitalnom modelu reljefa odvajaju pojedine tektonske cjeline, dok manji lokalni rasjedi izvedeni na temelju linearno razvijenih ponikava, uglavnom razdvajaju manje tektonske blokove, te ukazuju na deformacije i ispucanost pojedinog bloka.GIS based buffer analysis methods were applied for analysing spatial distribution and density of dolinas in the NW part of Velika Kapela. Results extracted from existing spatial databases indicated spatial distribution of faults, as well as a degree of relationship between direction and density of dolinas with identified lineaments. By comparing faults identified from dolina analysis, with faults identified during on-situ mapping, major tectonic blocks or units within researched area were identified. Bigger regional and local faults identified from digital elevation model are dividing larger tectonic units, while smaller local faults derived from linearly developed dolina are mostly dividing smaller tectonic blocks and can indicate their degree of faultness and deformities

Marko Zečević. 2017. Uvod u vojnu geologiju. Zagreb, Hrvatsko vojno učilište „Dr. Franjo Tuđman”. 57 str.

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Spatial Density of Dolines in the Croatian Territory

Cilj je ovog rada utvrditi prostornu gustoću ponikava na području krša Hrvatske i provesti korelaciju izračunatih vrijednosti gustoće ponikava s pojedinim geomorfološkim i geološkim čimbenicima njihova nastanka i razvoja. Kako bi se to postiglo, potrebno je izračunati prostornu gustoću ponikava temeljem jedinstvenih GIS metoda prikupljanja i analize podataka unutar čitavoga istraživanog područja. Gustoća ponikava unutar jedinične površne izračunata je na temelju kartiranih dna ponikava. Za potrebe određivanja dna ponikava upotrijebljene su digitalne kartografske podloge u mjerilu 1 : 25.000. Na temelju dobivenih podataka izračunata je prostorna gustoća ponikava jednostavnom kernel metodom unutar površine od 1 km2. Provedenom analizom prostornih razlika u intenzitetu gustoće ponikava, uočene su pojedine veze između njihova razvoja i morfometrijskih parametara reljefa, te litoloških i strukturnih obilježja terena.This paper deals with the spatial density of dolines in the Croatian territory covered by karst. The purpose of this paper is to calculate the spatial density of dolines and show a correlation between calculated doline density values and certain geomorphological and geological factors of their origin and development. Therefore, it has been necessary to calculate the spatial density of dolines applying unique GIS methods of data collection and analysis to the entire study area. Doline density per unit area has been calculated based on the mapped doline bottom. 1:25,000 scale digital cartographic models have been used to determine the doline bottom. The given data have been used to calculate the spatial density of dolines applying a simple kernel method to an area of one square kilometre. The analysis of spatial differences in doline density has revealed that certain connections exist between doline development and relief morphometric parameters as well as lithological and structural terrain features

Climate and relief influence on the carbonate surface corrosion intensity int he Velika Kapela mountain group

Istraživanje intenziteta površinske korozije u području gorske skupine Velike Kapele provedeno je metodom ¨standardnih vapnenačkih tableta¨. Kako spomenuta metoda ukazuje na zavisnost korozije i klimatskih elemenata izračunati su vertikalni gradijenti padalina za privjetrinske i zavjetrinske klimatološke stanice, te temperaturni vertikalni gradijenti u istraživanom prostoru. Eksponencijalnom korelacijskom analizom određena je međuzavisnost intenziteta korozije, kako gole vapnenačke površine, tako i subkutane korozije sa nadmorskom visinom, odnosno količinom prosječnih godišnjih padalina i temperaturom zraka.The research of surface corrosion in the area of Velika Kapela mountain group was performed by the method of standard limestone tablets. Since this method points at interdependence between corrosion and climatic elements, the perticipation vertical gradient for the windward and leeward located meteorological stations and temperature vertical gradient in the research area were calculated. Using the exponential correlation analysis, the interdependence between the corrosion intensity (on bare limestone surface and subcutaneous corrosion) and altitude, respectively the annual precipitation and temperatures was determined

High density culturing of porcine hepatocytes immobilized on nonwoven polyurethane-based biomatrices

Objective: Hepatocytes are increasingly used as functional units in bioartificial liver devices. The objective of the present study was to investigate the feasibility of culturing porcine hepatocytes in high density on a novel polyurethane-based nonwoven three-dimensional matrix. We investigated (1) the optimal cell density within this culture configuration, (2) the maintenance of liver-specific morphology and cell functions over long-term periods and (3) the necessity to apply an additional extracellular matrix component (collagen gel). Methods: Nonwoven polyurethane matrices were manufactured by a specially developed fiber extrusion technology. Pig hepatocytes were cultured at various cell densities of 0.1, 0.25, 0.5, 0.75, 1 and 2 x 10(6) cells/cm(2) on three-dimensional networks of nonwoven polyurethane matrices and cell adhesion as well as functional parameters (DNA of nonattached/attached cells, lactate dehydrogenase release and cytochrome P450 activity) were determined. To assess the performance of cells within this configuration albumin and urea excretion was measured over 8 days. The potentially beneficial effect of an additional extracellular matrix configuration was evaluated by comparing the average albumin synthesis in groups of identical cell numbers. Results: The optimal cell density in this three-dimensional culture configuration was 1 x 10(6) cells/cm(2). The functional capacity of hepatocytes was stable for 8 days at an average level of 53.7 +/- 5.6 ng/h/mug DNA and of 1.8 +/- 0.14 mug/h/mug DNA for albumin and urea excretion, respectively. The supplementation of an extracellular matrix configuration did not improve functional activity of cells. Average albumin synthesis was 35.6 ng/h/mug DNA (28.7, 42.8) and 32.7 ng/h/mug DNA (23.4, 49.2) for collagen-immobilized and control cultures, respectively, Conclusion: The results of the study indicate that nonwoven polyurethane sheets supply a biocompatible support structure for functionally active high density cultures. Thus, nonwoven polyurethane matrices should be further investigated on with respect to their role in the development, optimization and design of bioartificial liver systems. Copyright (C) 2001 S.Karger AG, Basel

Parada učenja - Dnevi učečih se skupnosti

This article presents some aspects of the 19-year development of the 'Lifelong Learning Week.' They have provided grounds for a new approach to the promotion of adult education and lifelong learning in Slovenia. The approach is named 'Learning Parade' (LP) and carries a subtitle that implies that learning is already deeply rooted in the communities in which it has been implemented. On the other hand, it is intended for the (further) development of learning communities. A concrete example of the Learning Parade is introduced along with some characteristics of its 14 implementations that have taken place until now. Their integration into the adult educational practice, profession, and policy is shown. The policy implemented at the European level has actually provided strategic and financial incentives for the endeavours described in the form of the 'Resolution on the Renewed European Agenda for Adult Learning.' The implementation of the Agenda is expected to continue in years to come, and it will continue to support the development of a learning societyČlanek predstavlja nekatere vidike 19-letnega razvoja projekta Teden vseživljenjskega uče-nja, ki so pripeljali do novega pristopa k promociji izobraževanja odraslih in vseživljenjskega učenja v Sloveniji. Ta nosi zveneče ime Parada učenja (PU) s podnaslovom, ki daje vedeti, da je učenje že vraščeno v okolja, v katerih je bil pristop uporabljen, in obenem spodbuja (nadaljnji) razvoj učečih se skupnosti. Opisani so primer in nekatere značilnosti dozdajšnjih 14 Parad učenja ter njihova vpetost v prakso, stroko in politiko izobraževanja odraslih. Slednja je na evropski ravni zagotovila strateške pa tudi finančne spodbude za opisana prizadevanja v obliki Resolucije o prenovljenem Evropskem programu za učenje odraslih. Uresničevanje tega programa bo teklo tudi v prihodnje in bo podpiralo razvoj učeče se družbe

KARTIRANJE TALA PANONSKOG DIJELA HRVATSKE PREMA UNIFIED SOIL CLASSIFICATION SYSTEM UPOTREBOM MULTINOMNE LOGISTIČKE REGRESIJE I INTERPOLACIJE INVERZIJOM UDALJENOSTI

The Unified Soil Classification System (USCS) is the basis for numerous methods for soil trafficability research. Since USCS data are not always available, various other data and methods are used to correlate and predict the USCS soil group. This paper describes two methods used for the purpose of mapping the Croatian part of the Pannonian Basin (PB) according to the USCS to a depth of 50 cm. In the first method, the possibility of the transfer of 308 profile samples according to the International Soil Science Society (ISSS) classification system into the USCS was examined. The results show that it is impossible to directly transform ISSS data into the USCS. In the second method 414 USCS profiles were used to analyse the weights of factors in the spatial analysis with inverse distance weighting (IDW). The analysis included layers of dominant and associated soil units of the Basic Soil Map of Croatia (BSM), Geological Map of Croatia (GM), drainage and catchment areas. The obtained weights were as follows: BSM 47.12%, catchment area 27.12%, GM 17.67% and drainage 8%. The results showed that PB in Croatia is covered with fine-grained soils, with clay covering almost the entire area and silt dominating in the western and north-western parts of the country.Unified Soil Classification System (USCS) osnova je brojnih metoda za istraživanje prohodnosti tla za vozila. Budući da podatci o USCS-u nisu uvijek dostupni, koriste se razni drugi izvori i metode za korelaciju i predviđanje USCS grupe tla. U ovome radu opisane su dvije metode korištene u svrhu kartiranja hrvatskog dijela panonskog bazena prema USCS-u do dubine tla od 50 cm. U prvoj metodi ispitana je mogućnost prijenosa 308 uzoraka tla prema sustavu klasifikacije International Soil Science Society (ISSS) u USCS. Rezultati su pokazali da nije moguće izravno transformirati podatke ISSS klasifikacije u USCS. U drugoj metodi korišteno je 414 USCS profila u analizi težišnih faktora u prostornoj analizi s ponderiranjem obrnute udaljenosti. Analizom su obuhvaćeni slojevi dominantnih i asocijativnih jedinica tala Osnovne pedološke karte Hrvatske (BSM), Osnovne geološke karte Hrvatske (GM), dreniranost tla i slivna područja. Dobivene ponderirane težine bile su: BSM 47,12 %, slivno područje 27,12 %, GM 17,67 % i dreniranost tla 8 %. Rezultati su pokazali da je panonski dio Hrvatske prekriven sitnozrnatim tlima, pri čemu je glinom prekriveno gotovo cijelo područje, dok prahovi dominiraju u zapadnim i sjeverozapadnim dijelovima panonskog bazena Hrvatske