61. Gostota lesa : metode določanja in pomen pri razvoju gozdno lesnega biogospodarstvaDomen Arnič, Miha Humar, Davor Kržišnik, Peter Prislan, Luka Krajnc, 2021, professional article Keywords: Slovenija, gostota lesa, določanje gostote, biogospodarstvo
Published in DiRROS: 12.11.2022; Views: 456; Downloads: 124
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62. Ocenjevanje kakovosti stoječih drevesLuka Krajnc, 2022, professional article Abstract: Spremljanje kakovosti lesa se začne v gozdu, saj je poznavanje trenutnega stanja eden izmed ključnih dejavnikov pri usmerjanju nadaljnjega razvoja gozda v smer večje kakovosti lesne surovine. Usmerjanje razvoja gozdov v smer večje kakovosti in s tem večje dodane vrednosti lesu pa za začetek terja merljivost kakovosti. Brez tega je presoja morebitnih ukrepov v sestoju skoraj nemogoča ali vsaj zelo otežena. Trenutno uporabljena metodologija za ocenjevanje kakovosti stoječih dreves na stalnih vzorčnih ploskvah Zavoda za gozdove Slovenije temelji na neveljavnih žagarskih standardih in bi jo bilo treba posodobiti za splošno uporabo v gozdarstvu. V prispevku je na kratko opisana obstoječa metodologija, predstavljen je pregled obstoječih metodologij ocenjevanja kakovosti stoječih dreves različnih držav in predlagana nova metodologija za ocenjevanje kakovosti dreves. Osnovni cilj opisanega dela je bil razvoj metodologije, s katero bi lahko objektivno primerjali kakovost debel med različnimi sestoji in bi omogočala sortiranje prostornine dreves v potencialne gozdnolesne sortimente (t.i. »sortimentacija«). Uporaba predlagane lestvice kakovosti za opis kakovosti stoječih dreves je lahko eden izmed pripomočkov pri odločanju kam, koliko časa ali sredstev vložiti v gozdnogojitveno ukrepanje v posameznem sestoju.
Keywords: kakovost stoječih dreves, kvaliteta debla, gozdnolesni sortimenti, sortimentacija stoječega drevesa
Published in DiRROS: 17.10.2022; Views: 604; Downloads: 154
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63. Estimating quantitative physiological and morphological tissue parameters of murine tumor models using hyperspectral imaging and optical profilometryTadej Tomanič, Luka Rogelj, Jošt Stergar, Boštjan Markelc, Tim Božič, Simona Kranjc Brezar, Gregor Serša, Matija Milanič, 2022, original scientific article Abstract: Understanding tumors and their micro-environment are essential for successfuland accurate disease diagnosis. Tissuephysiology and morphology are altered intumors compared to healthy tissues, andthere is a need to monitor tumors and their surrounding tissues, includingblood vessels, non-invasively. This preliminary study utilizes a multimodaloptical imaging system combining hyperspectral imaging (HSI) and three-dimensional (3D) optical profilometry (OP) to capture hyperspectral imagesand surface shapes of subcutaneously grown murine tumor models. Hyper-spectral images are corrected with 3D OP data and analyzed using the inverse-adding doubling (IAD) method to extract tissue properties such as melaninvolume fraction and oxygenation. Blood vessels are segmented using theB-COSFIRE algorithm from oxygenation maps. From 3D OP data, tumor vol-umes are calculated and compared to manual measurements using a verniercaliper. Results show that tumors can be distinguished from healthy tissuebased on most extracted tissue parameters (p<0:05). Furthermore, blood oxy-genation is 50% higher within the blood vessels than in the surrounding tissue,and tumor volumes calculated using 3D OP agree within 26% with manualmeasurements using a vernier caliper. Results suggest that combining HSI andOP could provide relevant quantitative information about tumors and improvethe disease diagnosis.
Keywords: medical physics, hyperspectral imaging, diffuse reflectance spectroscopy, blood vessels, tumors
Published in DiRROS: 08.09.2022; Views: 542; Downloads: 186
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64. Mid-Cretaceous calcarenite in stone products from the Roman colony of Emona, Regio X (modern Ljubljana, Slovenia)Rok Brajkovič, Bojan Djurić, David Gerčar, Blanka Cvetko Tešović, Boštjan Rožič, Luka Gale, 2022, original scientific article Abstract: Over the course of studying stone products from theRoman colony of Emona (Regio X), stratigraphicallyundefined calcarenite that was used to make simplesepulchral and architectural stone products wasdetected. The calcarenite used is late Aptian to earlyCenomanian in age. The corresponding facies werefound in the Lower Flyschoid Formation outcroppingnear the town of Medvode, within the local radius ofEmona. The Roman quarry was likely located in thisarea near the Sava River. According to the collecteddata, the quarry was in operation mainly in the 1stcentury.
Keywords: Cretaceous, microfacies, quarry production, Regio X, Roman time, stone products
Published in DiRROS: 17.08.2022; Views: 642; Downloads: 447
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65. Gospodarjenje s tujerodnimi drevesnimi vrstami v gozdovih alpskega prostoraSonia Abluton, Ajša Alagić, Bénédicte Baxerres, Frédéric Berger, Anja M. Bindewald, Sylvain Bouquet, Martin Braun, Giuseppe Brundu, Patricia Detry, Freya-Isabel Georges, Janez Kermavnar, Lado Kutnar, Aleksander Marinšek, Anica Simčič, Simon Zidar, 2022, dictionary, encyclopaedia, lexicon, manual, atlas, map Keywords: tujerodne drevesne vrste, Alpe, invazivne drevesne vrste, gospodarjenje z gozdovi, podnebne spremembe
Published in DiRROS: 12.08.2022; Views: 1077; Downloads: 235
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66. Management of non-native tree species in forests of the Alpine spaceSonia Abluton, Ajša Alagić, Bénédicte Baxerres, Frédéric Berger, Anja M. Bindewald, Sylvain Bouquet, Martin Braun, Giuseppe Brundu, Patricia Detry, Freya-Isabel Georges, Janez Kermavnar, Lado Kutnar, Aleksander Marinšek, Anica Simčič, Simon Zidar, 2022, dictionary, encyclopaedia, lexicon, manual, atlas, map Keywords: non-native tree species, Alps, invasive alien species, forest management, climate changes
Published in DiRROS: 12.08.2022; Views: 573; Downloads: 187
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68. Multi-method study of the Roman quarry at Podpeč sedimentary succession and stone productsRok Brajkovič, Luka Gale, Bojan Djurić, 2022, original scientific article Abstract: The paper presents a multi-method characterisation of the Roman quarry of the middle Lower Jurassic (Pliensbachian) limestone situated in the village of Podpeč, south of Ljubljana, and examples of the placement of stone products made from micritic, fine-grained, and oolithic facies into the known extent of the quarry. 23 m of the rock succession from the ancient quarry was exposed at the northern tip of the St. Ana Hill by archaeological trenching. Petrological, micropaleontological, mineralogical, geochemical, and isotopic analyses of carbon, oxygen, and strontium were performed in order to characterise the rocks exploited in the quarry. Additionally, a new detailed geological map of the wider Podpeč area was prepared, which defines in detail the lithostratigraphic units in the area.
Keywords: Lower Jurassic, Podbukovje Formation, provenance, facies, foraminifera, geochemistry, Emona, geoarchaeology
Published in DiRROS: 27.07.2022; Views: 741; Downloads: 261
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69. Kamnolom apnenca v Podpeči pri Ljubljani in njegovi izdelkiBojan Djurić, Luka Gale, Rok Brajkovič, 2022, original scientific article Abstract: Kamnolom v naselju Podpeč pri Ljubljani velja za glavni kamnolom rimske kolonije Emone (Ljubljana). Obstoj antič-nega kamnoloma v Podpeči je bil do sedaj utemeljen le na podlagi makroskopske podobnosti med Členom litiotidnega apnenca, ki izdanja v Podpeči, in z njim povezanimi rimskimi spomeniki, odkritimi v Ljubljani. V okviru pričujočega dela smo skušali poiskati oprijemljive arheološke in geoarheološke dokaze za njegov obstoj. V skrajno severnem delu kamnoloma smo izvedli arheološko sondiranje, hkrati pa natančno določili sestavo apnenca na tem območju in v 288 izdelkih iz antične Emone. Sondiranje severno od modernega kamnoloma je odkrilo dobro ohranjene sledove rimsko-dobne kamnoseške dejavnosti. Hkrati je litološka analiza spomenikov iz Emone razkrila, da je kar 182 (ali 64 odstotkov) analiziranih spomenikov izdelanih iz apnenca, litološko identičnega različkom, ki izdanjajo v Podpeči. Ti različki se prostorsko grupirajo severno od modernega kamnoloma. Pri tem sicer ostaja odprto vprašanje pripadnosti nekaterih različkov apnenca v izdelkih, ki so brez diagnostičnih komponent in bi lahko pripadali tudi nekoliko starejšemu Členu krkinega apnenca. Rekonstrukcijo obsega starega kamnoloma omogoča primerjava faciesov izvornih litostratigrafskih enot in izdelkov, pa tudi historična analiza zgodnjih kartografskih in katastrskih dokumentov. Analiza najzgodnejših izdelkov je omogočila hipotezo o prihodu kamnosekov iz kamnoloma v Nabrežini.
Keywords: Slovenija, Podpeč, Emona, rimska doba, litiotidni apnenec, mikrofaciesna analiza, rimski in novoveški kamnolom, izdelki
Published in DiRROS: 21.07.2022; Views: 677; Downloads: 564
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70. Synoptic risk assessment of groundwater contamination from landfillsSonja Cerar, Luka Serianz, Katja Koren, Joerg Prestor, Nina Mali, 2022, original scientific article Abstract: Waste management in Europe has improved in recent years, reducing the amount of waste disposed at landfills. However, there are still many landfills in the countries. It is well known that landfills that do not have measures in place to control leachate entering groundwater can contaminate groundwater long after the landfill is closed. Collecting monitoring results from all landfills allows permitting and management agencies to improve action plans. This relies on a synoptic risk assessment that allows prioritization and milestones to be set for required actions. The developed method of synoptic risk assessment is based on a conceptual model of the landfill and the results of chemical groundwater monitoring tested at 69 landfills in Slovenia. The study confirms that most landfills have a direct or indirect impact on groundwater quality. All landfills were classified into three priority classes on the basis of the synoptic risk assessment. The results show that a total of 24 landfills have a clearly pronounced impact on groundwater. A total of 31 landfills have a less pronounced impact due to the favorable natural attenuation capacity of the soil or the technically appropriate design of the landfill itself. A total of 14 landfills have a less pronounced or negligible impact on groundwater.
Keywords: conceptual model, synoptic risk assessment, landfill, groundwater, chemical analysis
Published in DiRROS: 19.07.2022; Views: 556; Downloads: 295
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