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141 - 150 / 2000
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141.
Nagradni stripovski natečaj Gozd in podnebne spremembe
Simon Zidar, Anica Simčič, Andreja Ferreira, Boštjan Mali, 2024, popular article

Keywords: gozdarstvo, natečaji, stripi
Published in DiRROS: 21.05.2024; Views: 116; Downloads: 0
.pdf Full text (159,69 KB)

142.
A cross-benchmark examination of feature-based algorithm selector generalization in single-objective numerical optimization
Gjorgjina Cenikj, Gašper Petelin, Tome Eftimov, 2024, original scientific article

Abstract: The task of selecting the best optimization algorithm for a particular problem is known as algorithm selection (AS). This involves training a model using landscape characteristics to predict algorithm performance, but a key challenge remains: making AS models generalize effectively to new, untrained benchmark suites. This study assesses AS models’ generalizability in single-objective numerical optimization across diverse benchmark suites. Using Exploratory Landscape Analysis (ELA) and transformer-based (TransOpt) features, the research investigates their individual and combined effectiveness in AS across four benchmarks: BBOB, AFFINE, RANDOM, and ZIGZAG. AS models perform differently based on benchmark suite similarities in algorithm performance distributions and single-best solvers. When suites align, these models underperform against a baseline predicting mean algorithm performance; yet, they outperform the baseline when suites differ in performance distributions and solvers. The AS models trained using the ELA landscape features are better than the models trained using the TransOpt features on the BBOB and AFFINE benchmark suites, while the opposite is true for the RANDOM benchmark suite. Ultimately, the study reveals challenges in accurately capturing algorithm performance through problem landscape features (ELA or TransOpt), impacting AS model applicability.
Keywords: algorithm selection, multi-target regression, generalization, benchmarking
Published in DiRROS: 21.05.2024; Views: 116; Downloads: 278
.pdf Full text (2,49 MB)
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143.
Gozdarske smučarske prireditve v zimi 2023- 2024
Janez Konečnik, 2024, popular article

Keywords: gozdarska tekmovanja, gozdarska smučarska temovanja
Published in DiRROS: 21.05.2024; Views: 126; Downloads: 0
.pdf Full text (587,66 KB)

144.
2. delavnica javne gozdarske službe na temo gozdnega semenarstva in drevesničarstva
Boris Rantaša, 2024, popular article

Keywords: drevesničarstvo, semenarstvo, javna gozdarska služba
Published in DiRROS: 21.05.2024; Views: 134; Downloads: 0
.pdf Full text (141,18 KB)

145.
Izdelava sestojne karta na podlagi lidarskih podatkov
Andrej Bončina, Vasilije Trifković, Christian Rosset, 2024, original scientific article

Abstract: Sestojna karta je pomemben vir podatkov o gozdnih sestojih. Postopki izdelave sestojne karte so različni. V prispevku prikazujemo i) postopek izdelave avtomatizirane sestojne karte (TBk), ki so ga razvili na Bern University of Applied Sciences (BFH), ii) izdelani sestojni karti TBk za gozdni območji Draga in Pokljuka, iii) klasifikacijo sestojev v sestojne tipe na teh območjih ter iv) rezultate primerjave avtomatske sestojne karte s sestojno karto, ki jo izdeluje Zavod za gozdove Slovenije. Pri izdelavi TBk je dominanta višina drevja temeljni kriteriji razmejevanja sestojev, dominantna višina in stopnje zastiranje po sestojnih plasteh pa so temeljni kriteriji za klasifikacijo sestojev v sestojne tipe. Na TBk karti v Dragi in na Pokljuki je povprečna velikost sestoja 1,76 ha in 1,64 ha , kar je precej manj od povprečne velikosti sestoja na karti ZGS (5,90 ha in 2,85 ha). V velikostni strukturi sestojev na TBk v skupnem številu sestojev prevladujejo sestoji s površino, manjšo od 0,5 ha. Deleži sestojnih tipov na TBk in karti ZGS se ujemajo, razmejitev sestojev pa se razlikuje zaradi različnih kriterijev in podrobnejše obravnave sestojev pri TBk. Aktualnost karte TBk je pogojena s starostjo lidarskih posnetkov. Prednosti TBk so hitra izdelava, objektivnost razmejevanja, možnost spremljanja sprememb gozdnih sestojev v času, večplastne informacije o sestojih, poglavitna omejitev pa je omejen nabor sestojnih znakov, kot so poškodovanost, negovanost, kakovost, ki jih sicer pridobimo pri opisovanju gozdov, TBk tudi ne obsega podrobnega načrta.
Keywords: sestojna karta, lidarski podatki, klasifikacija sestojev, TBk
Published in DiRROS: 21.05.2024; Views: 137; Downloads: 76
.pdf Full text (614,02 KB)

146.
Gozdna tla in vegetacija eno leto po požaru na Goriškem Krasu
Valerija Babij, Lado Kutnar, Aleksander Marinšek, Janez Kermavnar, 2024, original scientific article

Abstract: V letu 2023 − eno leto po obsežnem požaru na Goriškem Krasu, ki je divjal julija leta 2022 − smo na izbranih gozdnih vzorčnih ploskvah popisali zeliščno, grmovno in drevesno vegetacijo in analizirali tla do globine 10 cm. Ploskve smo izbrali na lokacijah stalnih vzorčnih ploskev ZGS z različno stopnjo poškodovan osti zaradi požara. Na izbranih ploskvah smo skupno popisali 260 vrst praprotnic in semenk. V drevesni plasti smo popisali trinajst vrst (enajst domorodnih in dve tujerodni), v grmovni plasti trideset, v zeliščni pa 255. V drevesni plasti so bili najpogostejši mali jesen, črni gaber in črni bor, v grmovni mali jesen, navadni ruj in robide. V zeliščni plasti smo med drugimi popisali tudi devetnajst drevesnih vrst, ki so pomembna zasnova pri naravni obnovi požganega gozda na Krasu; najpogostejša sta bila črni gaber in rešeljika. Gradient poškodovanosti po požaru se jasno kaže v večini vegetacijskih in talnih spremenljivk. Statistično značilne razlike med skupinami ploskev z različno stopnjo poškodovanosti smo ugotovili za šest parametrov: pH-vrednosti in vsebnosti žvepla v organskem delu tal, zastiranje drevesne plasti, zastiranje mahov, število vrst v spodnji drevesni plasti, število vrst zeliščne plasti. Na ploskvah smo prepoznali devet (ter še tri vrste na požarišču zunaj ploskev) invazivnih ali potencialno invazivnih tujerodnih rastlinskih vrst; med drevesnimi sta bila najpogostejša robinija in visoki pajesen. Študija pomembno prispeva k razumevanju razvoja vegetacije, pomlajevanja ključnih drevesnih vrst in poškodb gozdnih tal v inicialni fazi po obsežnem požaru.
Keywords: gozdna vegetacija, poškodbe tal, gozdni požar, drevesne vrste, pestrost vrst, invazivne rastlinske vrste, Kras, Slovenija
Published in DiRROS: 21.05.2024; Views: 130; Downloads: 92
.pdf Full text (1,33 MB)

147.
Rare Middle Triassic coleoids from the Alpine-Carpathian system: new records from Slovakia and their signifcance
Martin Košťák, Ján Schlögl, Dirk Fuchs, Milan Havrila, Tea Kolar-Jurkovšek, Attila Vörös, Martina Havelcová, Juraj Šurka, Jakub Havrila, Katarína Holcová, 2024, original scientific article

Abstract: Two stratigraphically well constrained (by ammonites and conodonts) coleoid remains have been recorded from the Triassic (Anisian) dark-grey organodetritic limestones (Ráztoka Limestone) of Western Carpathians (Hronic Nappe). The limestones deposited at the periphery of a former carbonate platform. It yields a highly diverse cephalopod fauna including nautiloids (2 taxa), ammonoids (7 taxa) and indetermined aulacoceratids. Two unusual coleoid specimens are referred to genus Mojsisovicsteuthis (M. boeckhi) and probably to a new taxon (described as Breviconoteuthis aff. breviconus herein) possessing similar morphological features of genus Breviconoteuthis (Phragmoteuthida) and/or Zugmontites. Based on index ammonites and conodonts, both records are of the uppermost Trinodosus through the lowermost Reitzi zones (Anisian—lower Illyrian). While the genus Mojsisovicsteuthis has been widely dispersed (however its records are rare), the occurrence of Breviconoteuthis and Zugmontites is strictly limited to the Alpine-Carpathian region. Comparing with the holotype and additional specimens stored in the Hungarian Natural History Museum, the overal shell of Mojsisovicsteuthis and its size has been reconstructed. Its relationship to aulacoceratids and phragmoteuthids is briefly discussed. Geochemical record (n-alkanes from the bulk rock) provided a relevant signal of the existence of algal meadows.
Keywords: Cephalopods, Conodonts, Anisian, Palaeoenvironment
Published in DiRROS: 21.05.2024; Views: 116; Downloads: 159
.pdf Full text (6,08 MB)
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148.
In vitro degradation behaviour of biodegradable magnesium alloys
Julia Nachtsheim, Jaka Burja, Songyun Ma, Bernd A. Markert, 2023, published scientific conference contribution

Keywords: biodegradable magnesium alloy, in vitro corrosion behaviour
Published in DiRROS: 20.05.2024; Views: 116; Downloads: 474
.pdf Full text (1,73 MB)
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149.
150.
Spremembe gozdne vegetacije po požaru in digitalna sestojna kart
Boris Rantaša, Aleš Poljanec, 2024, preface, editorial, afterword

Keywords: digtalna sestojna karta, gozda vegetacija
Published in DiRROS: 20.05.2024; Views: 131; Downloads: 85
.pdf Full text (39,46 KB)

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