Results 1 to 10 of about 26,858 (250)

Expanded obsidian as a soil aerator, its porosity, physical and mechanical characteristics [PDF]

open access: yesE3S Web of Conferences, 2020
Today, the decline in soil fertility progress, therefore, special attention paid to the search for new, including non-traditional sources of raw materials that allow cultivating agricultural crops. It is propose to use expanded obsidian as a soil aerator.
Safaryan Artsruni   +4 more
doaj   +1 more source

The origin and exchange of obsidian from Vinča-Belo Brdo [PDF]

open access: yesStarinar, 2008
Since the time of the revolutionary characterization of obsidian in the 1960's only a small number of artefacts from the Serbian sites have been analyzed, of which at least seven samples come from the site of Vinča. These results showed that obsidian was
Tripković Boban, Milić Marina
doaj   +1 more source

Central Oregon obsidian from a submerged early Holocene archaeological site beneath Lake Huron.

open access: yesPLoS ONE, 2021
Obsidian, originating from the Rocky Mountains and the West, was an exotic exchange commodity in Eastern North America that was often deposited in elaborate caches and burials associated with Middle Woodland era Hopewell and later complexes.
John M O'Shea   +6 more
doaj   +1 more source

Spire: A Cooperative, Phase-Symmetric Solution to Distributed Consensus

open access: yesIEEE Access, 2021
All existing solutions to distributed consensus are organised around a Paxos-like structure wherein processes contend for exclusive leadership in one phase, and then either use their dominant position to propose a value in the next phase or elect an ...
Emil Koutanov
doaj   +1 more source

The Logical Timestamp Skew Anomaly in Event-Replicated Transaction Schedulers

open access: yesIEEE Access, 2021
To sidestep reasoning about the complex effects of concurrent execution, many system designers have conveniently embraced strict serializability on the strength of its claims, support from commercial and open-source database communities and ubiquitous ...
Emil Koutanov
doaj   +1 more source

Obsidian and Obsidian-like Glass Tesserae: A Multidisciplinary Approach to Study the Dedication Wall Mosaic in the Church of St. Mary of the Admiral in Palermo (12th Century)

open access: yesOpen Archaeology, 2020
Pliny the Elder testifies that roman workshops used volcanic glass (obsidian), but also produced and used a dark glass (obsidian-like glass) quite similar to the natural one.
Cantone Valentina   +3 more
doaj   +1 more source

Archaeological data on obsidian exchange in Northern Mesopotamia in IV–III mill. BC.

open access: yesВестник археологии, антропологии и этнографии, 2016
The article deals with a range of questions concerning obsidian exchange in settlements of Northern Mesopotamia. The chronological framework includes IV and III mill. BC (from Late Ubaid to Akkadian Periods). The first part presents the state of research
Ibragimova E.R.
doaj   +1 more source

Characterization of the Obsidian Used in the Chipped Stone Industry in Kendale Hecala

open access: yesQuaternary, 2022
Kendale Hecala is located on the Ambar River in the Upper Tigris Basin, province of Diyarbakır in Southeast Anatolia. Various raw materials, including obsidian, radiolarite, chert, jasper, chalcedony, and quartzite, were used in the lithic industry ...
Üftade Muşkara, Ayşin Konak
doaj   +1 more source

Shirataki obsidian exploitation and circulation in prehistoric northern Japan

open access: yesJournal of Lithic Studies, 2014
Presently, the total number of archaeological obsidian sources in Japan is more than 80, and among them, 21 are in Hokkaido, northern part of the Japanese archipelago (Izuho and Sato 2007).
Miyuki Yakushige, Hiroyuki Sato
doaj   +1 more source

Budaya Obsidian di Tepian Danau Bandung Purba

open access: yesPubawidya: Jurnal Penelitian dan Pengembangan Arkeologi, 2016
Abstrak Tulisan ini mencoba untuk menguraikan hasii studi tentang budaya obsidian, yang telah diiemukan di iokasi tepian Danau Bandung Purba. Dapat diperkiraan dari Hngkungan tempat penemuan mcnunjukkan bahwa artefak obsidian dipergunakan sebagai ...
Lutfi Yondri
doaj   +1 more source

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