Results 61 to 70 of about 189,353 (349)

Red Slip Beaker with a Relief Ornamentation from the Eastern Black Sea Area

open access: yesАнтичная древность и средние века, 2020
From 2014 on, the archaeological excavations of the Roman fort of Apsaros (Gonio, eastern Black Sea area) concentrated in the central area of early buildings, where a large architectural complex from the second half of the first to the first half of the ...
Viktoriia Aleksandrovna Nessel’
doaj   +1 more source

Just Passing Through [PDF]

open access: yes, 2003
The purpose of this resource is to develop an understanding of some of the relationships between soils of different types and water. Students will time the flow of water through soils with different properties and measure the amount of water held in ...
The GLOBE Program, University Corporation for Atmospheric Research (UCAR)
core  

3D Digital Light Processing of Redox‐Active Polymers for Electrochemical Applications

open access: yesAdvanced Functional Materials, EarlyView.
3D printing of electrochemically switchable conducting polymers is achieved by Digital Light Processing of redox‐active carbazole‐based polymer materials. Complex 2D and 3D architectures including dot arrays and pyramids clearly show the potential for novel 3D switchable electrochemical devices for sensors, electrochromic displays as well as 3D printed
Christian Delavier   +4 more
wiley   +1 more source

Geneza kultury pucharów lejkowatych w kontekście przemian kulturowych w Europie Północnej w V tys. BC

open access: yesPrzegląd Archeologiczny, 2013
The origin and further development of the Funnel Beaker Culture is one of the key problems in the studies of the middle Neolithic of Northern Europe. This paper presents and discuss new data from the Dąbki site (southern Baltic coastal area), where Late ...
Agnieszka Czekaj-Zastawny   +2 more
doaj  

Genomes from Verteba cave suggest diversity within the Trypillians in Ukraine

open access: yesScientific Reports, 2022
The transition to agriculture occurred relatively late in Eastern Europe, leading researchers to debate whether it was a gradual, interactive process or a colonisation event. In the forest and forest-steppe regions of Ukraine, farming appeared during the
Pere Gelabert   +10 more
doaj   +1 more source

Electrical Conductivity Protocol [PDF]

open access: yes, 2003
The purpose of this resource is to measure the conductivity of water at a freshwater hydrology site. Students calibrate and take electrical conductivity measurements using an electrical conductivity meter.
The GLOBE Program, UCAR (University Corporation for Atmospheric Research)
core  

High‐Yield Synthesis of Fe‐NC Electrocatalysts Using Mg2+ Templating and Schiff‐Base Porous Organic Polymers

open access: yesAdvanced Functional Materials, EarlyView.
Fe─NC porous oxygen reduction electrocatalysts are prepared employing a 2,4,6‐Triaminopyrimidine‐based porous organic polymer, a Mg2+ Lewis acid, and a low‐temperature cation exchange protocol. Using the polymer precursor achieves high pyrolysis yields and results in atomically dispersed FeNx sites. The resulting catalysts feature hierarchical porosity
Eliot Petitdemange   +11 more
wiley   +1 more source

L’occupation néolithique et protohistorique du site de Magny-Cours, Le Pré-de-la-Fontaine (Nièvre)

open access: yesRevue Archéologique de l’Est, 2013
The occupation from the Neolithic to the Early Bronze Age of the Magny-Cours Le Pré-la-Fontaine site was disclosed by a diagnostic survey recently conducted in the alluvial plain of the Allier river.
Franck DUCREUX   +2 more
doaj  

Microplastics from Wearable Bioelectronic Devices: Sources, Risks, and Sustainable Solutions

open access: yesAdvanced Functional Materials, EarlyView.
Bioelectronic devices (e.g., e‐skins) heavily rely on polymers that at the end of their life cycle will generate microplastics. For research, a holistic approach to viewing the full impact of such devices cannot be overlooked. The potential for devices as sources for microplastics is raised, with mitigation strategies surrounding polysaccharide and ...
Conor S. Boland
wiley   +1 more source

The Funnel Beaker and Globular Amphora Cultures in the Sandomierz Upland in the Light of Settlement Research

open access: yesArchaeologia Polona, 2019
The article concerns the Neolithic settlement structures of the Funnel Beaker culture and Globular Amphora cultures in the Sandomierz Upland, discussed comparatively in the context of interrelationships and relationships with the exploitation of flint ...
Hanna Kowalewska-Marszałek
doaj   +1 more source

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