V prispevku so zajete naravnogeografske značilnosti Rakovško-Unškega polja, ki leži v Notranjskem podolju. Poleg geoloških in reliefnih značilnosti so obravnavane tudi druge naravne sestavine te ...pokrajinske enote. Večji poudarek je posvečen vodnim in podnebnim razmeram ter prstem. Večletna zbiranja podatkov so pokazala, da Rakovško-Unško polje ni suho polje, saj po večji količini padavin izvira voda v več izvirih, teče po polju in ponika v ponikalnicah. Merjenja zračnih temperatur v mirnem zimskem anticiklonalnem vremenu so pokazala, da tudi na tem polju nastopa temperaturni obrat. Za prsti je značilno, da so s pedogenezo na robnih delih polja nastale na dolomitni kamnini, na dnu polja pa po vsej verjetnosti na glinasti matični podlagi. Na samem dnu polja naravne vegetacije ni več, razprostira se antropogena raba in z njo povezano rastlinstvo. Robne dele polja poraščajo travišča in gozd bora s trirobo košeničico.
In this paper, a preliminary analysis of the landslide inventory is presented for the wider area of the municipalities of Glina and Dvor, within Sisak-Moslavina County in Croatia, where LiDAR ...scanning for 45.85 km2 was conducted. Landslide polygons were outlined based on the visual interpretation of HRDEM derivates. In total, 477 landslides were contoured with an average landslide density of 9.85 per km2. Most of the landslides are characterised as moderate, shallow, and not recent. The spatial relationship between landslides and geological units is expressed with the landslide index. Subsequently, the geological units were grouped into four engineering geological units representing different susceptibilities to landslides. The geological units most prone to landslides are the Eocene, Oligocene, Palaeocene and Jurassic sandstones. Even though all geological units were analysed here, the majority of landslides are within sandstones. A particular emphasis was on landslide occurrence in metamorphic and igneous rocks of the ophiolite sequence, a distinctive characteristic of the research area where less susceptibility to landslide processes was observed. Moreover, to further distinguish the differences between the units in the area a morphometric characteristic (relief) and drainage network was also analysed. The purpose of this analysis was to additionally confirm the landslide susceptibility assessment and the division of geological units into engineering geological units, which again implied the different behaviours between landslides in igneous and metamorphic rocks compared to sandstones. Because the research area is poorly studied regarding landslide susceptibility, relief, and drainage networks, these findings will be a step forward in recognising the relationship between them and creating a base for the development of a landslide susceptibility map for this area.
The Glina-type flanged axes were acknowledged as such in 1975 by Alexandru Vulpe. Seventeen artefacts of this type exist up to the present moment, distributed in south-eastern Transylvania and south ...of the Carpathians, mainly in the Olt and Argeș basins. The finds here suggest the presence of several typological variants, while their inclusion in one main type is indicated by their general aspect and proportions. All are cast in closed bivalve moulds with the metal poured through the butt. Some were subjected to compositional analyses, such as the axe from Râșnov (cat. no. 14) with 5% Sn. In the case of two artefacts, the conditions of discovery are unknown, three are isolated finds, two are part of a hoard alongside a shaft-hole axe, and the remaining nine originate from various occupation contexts. Geographically-wise, two finds from south-eastern Transylvania come from Schneckenberg or Jigodin-type contexts and seven artefacts recovered south of the Carpathians originate from Glina-type settlements. We may thus conclude that the Glina-type flanged axes represent a consistent group, well individualised in time and space. They constitute one of the arguments (alongside the Dumbrăvioara-type shaft-hole axes, the Runcuri-type pottery etc.) for the very close links between the Glina-type communities and those on the Upper Olt Basin, within a chronological horizon dated, most probably, between 2700 and 2500 BC.
Tipul Glina al topoarelor plate cu margini ridicate a fost definit de Alexandru Vulpe în 1975, astăzi fiind cunoscute un număr de 17 exemplare răspândite în sud-estul Transilvaniei şi la sud de Carpaţi, în principal în bazinele Oltului şi Argeşului. Piesele prezentate indică mai multe variante tipologice, însă includerea lor în cadrul aceluiaşi tip este susţinută de aspectul general şi de proporţiile pieselor respective. Toate sunt turnate în tipare bivalve închise cu metalul turnat pe la ceafă. Câteva dispun şi de analiza elementală, remarcându-se toporul de la Râşnov (cat. no. 14) cu 5% Sn. Pentru două exemplare nu se cunosc condiţiile de descoperire, trei sunt descoperiri izolate, două fac parte dintr-un depozit împreună cu un topor cu gaură de înmănuşare transversală, iar celelalte nouă pot fi puse în legătură cu diferite contexte de locuire. Astfel, două piese din sud-estul Transilvaniei se leagă de contexte cu descoperiri de tip Schneckenberg sau Jigodin, iar şapte de la sud de Carpaţi de aşezări de tip Glina. Se poate concluziona că topoarele plate cu margini ridicate de tip Glina formează un grup consistent, bine individualizat în timp şi spaţiu. Ele se constituie (alături de topoarele cu gaură de înmănuşare transversală de tip Dumbrăvioara, ceramica de tip Runcuri etc.) într-unul din argumentele relaţiilor foarte strânse dintre comunităţile de tip Glina şi cele din bazinul superior al Oltului, într-un orizont cronologic ce poate fi stabilit, cel mai probabil, între 2700– 2500 BC.
Băjenaru Radu. The Glina-type flanged axes revisited. In: Materiale şi cercetãri arheologice (Serie nouã), H-S 2021. pp. 553-568.
Upotreba kaolinske gline u uzgoju voća Soldo, Tomislav; Duralija, Boris; Benčić, Đani ...
Glasnik Zaštite Bilja,
06/2022, Letnik:
45., Številka:
3.
Journal Article
Recenzirano
Odprti dostop
Proizvodi na bazi kaolinske gline sve više se koriste u proizvodnji voća, a posebice onoj ekološkoj. Posljednjih godina prisutan je trend značajnog smanjenja broja dozvoljenih konvencionalnih ...sredstava za zaštitu bilja od štetnih organizama, što za posljedicu ima i postupni prijelaz s konvencionalne na ekološku proizvodnju voća. U ovom radu prikazane su mogućnosti korištenja proizvoda na bazi kaolinske gline u voćarstvu. Predstavljene su mogućnosti korištenja kaolinske gline u zaštiti od štetnika i bolesti, smanjenju ekološkog stresa uzrokovanog visokim temperaturama, zaštiti od ožegotina, povećanju uroda, poboljšanom obojenju i kvaliteti ploda. Kaolinska glina ima velike mogućnosti za unaprjeđenje voćarske proizvodnje u Republici Hrvatskoj, napose u ekološkoj proizvodnji, gdje zbog svoje široke primjene i učinkovitosti postaje praktički nezaobilazna.
U radu se navode i analiziraju obilježja povijesno-prostornog razvoja Gline od njezina osnutka tridesetih godina 18. stoljeća izgradnjom bastionske utvrde na ušću rijeke Maje u Glinu, do sredine 19. ...stoljeća, kada je formirana osnovna urbana struktura mjesta sa svim svojim vrijednostima na kojima počiva kulturnopovijesni i prostorni identitet današnjega grada. Razvoj Gline prati se na temelju poznatih i nekoliko dosad neobjavljenih kartografskih izvora.
Cohesive soils are found all over the world and can cause significant harm to infrastructure and structures. Many innovative ways to improve the strength of cohesive soils are being explored to ...decrease the negative qualities and make them appropriate for construction applications. The availability of novel materials, in addition to traditional procedures, has boosted the area of soil reinforcement. In the realm of soil stabilisation, the inclusion of nanomaterials is one of the newest creative ideas. In geotechnical engineering, nanotechnology could be viewed as dual methods: the composition of the soil can be found at the nanoscale, and soil modification can be accomplished at the atomic and molecular levels. The goal of this research is to see if it is possible to stabilise cohesive soil using two distinct nanomaterials and to look at the changes in geotechnical parameters. Nanocrystalline magnesium oxide and nano zinc oxide is included in the soil with (0.25, 0.5, 0.75 and 1) w/% and trials were executed to evaluate the optimal percent and strength properties of the mixtures.
The sedimentary succession along the Belaya River (North Caucasus) provides a record of middle Eocene to Miocene sediments. This time interval is well known for its important climatic transitions ...(e.g., Middle Eocene Climate Optimum (MECO) and Eocene-Oligocene Transition (EOT)), and changes in basin configuration from Peri-Tethys to Paratethys. The Belaya section contains two intervals marked by oxygen-depleted sediments; the Eocene Kuma Formation of the Peri-Tethys and the Oligocene Maikop Group of the Paratethys. Both are considered important source rocks for hydrocarbon exploration in the Black Sea and Caspian Sea. We present integrated stratigraphic results of the Belaya River section using calcareous nannoplankton biostratigraphy, magnetostratigraphy and 40Ar/39Ar dating. Furthermore, we investigate the geochemical character of the sediments using X-ray fluorescence (XRF) and stable carbon and oxygen isotopes. A middle Eocene age for the lower part of the succession is established from nannoplankton biostratigraphy. The Kuma Formation is dated between 42.1 and 38.4 Ma based on the assumption of constant sediment accumulation rates. A negative oxygen isotope excursion in the middle part of the Kuma Formation could be related to the MECO (~40 Ma). The onset of the Maikop Group is dated around the base of chron C13n at an age of ~33.7 Ma, close to the Eocene-Oligocene boundary. Based on geochemical results, we show that the Kuma Formation and Maikop Group correspond to two different episodes of intensified oceanic oxygen depletion in the succession. We hypothesise that oxygen-depletion as recorded in the Kuma Formation is linked to an increased nutrient input in the open marine Peri-Tethys due to widespread volcanism in the Neotethys subduction zone, while oxygen-depletion as recorded in the Maikop Group is linked to basin restriction caused by the eustatic sea-level fall straddling the Eocene – Oligocene boundary triggering stratified conditions in the semi-isolated Paratethys Sea.
•Integrated stratigraphy from Eocene to Oligocene at the Maikop group type section.•Section comprises sedimentary record through important climate transitions.•XRF results indicate two oxygen-depleted episodes in the succession.•Section contains the Middle Eocene Climatic Optimum in oxygen-depleted sediments.•Succession is probably continuous through Eocene-Oligocene transition.
Initial shear stress is inevitable in actual engineering slopes, subgrades and foundations. The soils exhibit different dynamic characteristics under an initial shear stress. The dynamic strength ...characteristics of saturated clay under cyclic loading were studied through a dynamic triaxial test of remoulded clay in the Wenchuan area. The effects of the failure criterion, initial shear stress and vibration frequency on the dynamic strength characteristics of saturated clay were also analysed. The results showed that the strain failure criterion with a strain value of 2.5 % or the transitional strain εtp can reflect the soil damage realistically and evaluate the dynamic strength of the soil objectively. εp = 2.5 % can be used to replace εp = εtp when the dynamic strength parameter of the saturated clay was calculated under seismic loading equivalent failure vibration times. The dynamic strength parameters of the saturated clay under different earthquake magnitudes were calculated by introducing the equivalent failure vibration times of the soil under seismic loading, thereby providing data support for the stability analysis of the clay foundation under seismic loading. The initial shear stress and vibration frequency have a considerable effect on the dynamic strength of saturated clay. Under the same vibration frequency, the larger the initial shear stress is, the smaller the required dynamic stress is for the soil to break, and the smaller the dynamic strength parameter is. The existence of the initial shear stress reduces the dynamic strength of the soil. Under the same vibration times, the higher the vibration frequency is, the greater the required dynamic stress is for the soil to break, the larger the dynamic strength parameter is, and the greater the dynamic strength of the soil is.
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