Results 21 to 30 of about 10,057 (205)

Spatial and Temporal Distribution of Obsidian in Oklahoma: Conveyance Zones on the Southern Plains [PDF]

open access: yes, 2023
Obsidian is an exotic lithic resource rarely found in Oklahoma, yet it still occurs in the archaeological record. This project utilized Energy Dispersive X-ray Fluorescence (EDXRF) Mass Spectrometry to geochemically source 110 obsidian artifacts from ...
Oliver, James
core  

Chemical diffusion of fluorine in melts in the system Na2OAl2O3SiO2 [PDF]

open access: yes, 1985
The volatilization of fluorine from three melts in the system Na2OAl2O3SiO2 has been investigated at 1 atm pressure and 1200–1400°C. The melts chosen have base compositions corresponding to albite, jadeite and a peraluminous melt with 75 mole % SiO2 ...
Scarfe, Christopher M.   +1 more
core   +1 more source

Analysis by pXRF of Prehistoric Obsidian Artifacts From Several Sites on Ustica (Italy): Long-Distance Open-Water Distribution From Multiple Island Sources During the Neolithic and Bronze Ages

open access: yesOpen Archaeology, 2020
The small island of Ustica was a regular part of the obsidian distribution network in the central Mediterranean, despite its location more than 50 km north of western Sicily.
Tykot Robert H., Martin Franco Foresta
doaj   +1 more source

Characterization and Provenance of Archaeological Obsidian from Pirozza-Spalmatore, a Site of Neolithic Colonization on the Island of Ustica (Sicily)

open access: yesOpen Archaeology, 2019
This article presents the first archaeometric research carried out so far on a group of obsidian artifacts collected in the promontory of Pirozza-Spalmatore, the site of a Neolithic settlement on the small island of Ustica (Sicily, Italy).
Franco Foresta Martin, Tykot Robert H.
doaj   +1 more source

A Compositional Study (pXRF) of Early Holocene Obsidian Assemblages from Cyprus, Eastern Mediterranean

open access: yesOpen Archaeology, 2019
This paper presents the results of the geochemical characterisation of complete obsidian assemblages dating to the Early Aceramic Neolithic (8200–6900 Cal BC) and located in Cyprus, eastern Mediterranean.
Moutsiou Theodora
doaj   +1 more source

A New Aceramic Neolithic Site Nearby the Obsidian Sources: Preliminary Insights from Sırçalıtepe

open access: yesAnadolu Araştırmaları, 2021
This paper is a general assessment of the studies conducted in 2019 and 2020 at the site of Sırçalıtepe. The settlement, which is dated to the 8th mill BCE, is located in the Volcanic Cappadocia region, within the borders of the Kayırlı village in the ...
Semra Balcı   +5 more
doaj   +1 more source

Obsidian [PDF]

open access: yes
Short presentation on Coffee Lectures on taking notes in Obsidian.Stručná prezentace z pilotního kola Coffee Lectures na téma zaznamenávání poznámek v ...
Urban, Adam
core   +4 more sources

Analisis Teknologi Artefak Obsidian Danau Bandung Purba

open access: yesPubawidya: Jurnal Penelitian dan Pengembangan Arkeologi, 2012
. Stone tool's was one of a kind that prehistory man use and made, where is purpose or un purpose to help their daily life's. There's lot of stone material that man could use to make stone tool and one of them is Obsidian.
Anton Ferdianto
doaj   +1 more source

Carbonic anhydrase 2-derived drug-responsive domain regulates membrane-bound cytokine expression and function in engineered T cells

open access: yesCommunications Biology
Adoptive cell therapies (ACT) have shown reduced efficacy against solid tumor malignancies compared to hematologic malignancies, partly due to the immunosuppressive nature of the tumor microenvironment (TME). ACT efficacy may be enhanced with pleiotropic
Mara C. Inniss   +17 more
doaj   +1 more source

Exact Methods for the Cumulative Capacitated Vehicle Routing Problem With Time Windows

open access: yesNetworks, EarlyView.
ABSTRACT This article studies the cumulative capacitated vehicle routing problem with time windows (CCVRPTW). The CCVRPTW consists of deciding the routing schedules for a set of homogeneous capacitated vehicles such that the latency, that is, the sum of the service start times at the customers, is minimized and the time windows as well as the vehicle ...
Alan Osorio‐Mora, Timo Gschwind
wiley   +1 more source

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