Results 31 to 40 of about 398,792 (302)

Incipient stages of transformation of round natural diamonds under dissolution in Fe-S melt at high pressure

open access: yesЛитосфера, 2020
Research subject. The article presents the results of a microscopic and photogoniometric study of natural rounded diamonds of tetraghexahedral habit from the kimberlite pipe “Internationalnaya” (Yakutia). The diamonds was partially dissolved in a sulphur-
V. M. Sonin   +5 more
doaj   +1 more source

Entanglement, Holography and Causal Diamonds [PDF]

open access: yes, 2016
We argue that the degrees of freedom in a d-dimensional CFT can be re-organized in an insightful way by studying observables on the moduli space of causal diamonds (or equivalently, the space of pairs of timelike separated points).
de Boer, Jan   +3 more
core   +2 more sources

Deforming diamond

open access: yesIMA Journal of Applied Mathematics, 2016
For materials science, diamond crystals are almost unrivaled for hardness and a range of other properties. Yet, when simply abstracting the carbon bonding structure as a geometric bar-and-joint periodic framework, it is far from rigid. We study the geometric deformations of this type of framework in arbitrary dimension d, with particular regard to the ...
Borcea, Ciprian, Streinu, Ileana
openaire   +2 more sources

Diamond fingerprinting for source discrimination using laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) and Fourier transform infrared spectrometry (FTIR)

open access: yesHeliyon, 2020
The Kimberley Process Certification Scheme (KPCS) was established in 2000 as a means of controlling the flow of conflict diamonds, mostly, from the African continent. In 2013, the KPCS imposed an embargo on diamonds from the Central African Republic (CAR)
Susan Brill   +2 more
doaj   +1 more source

Application of introduced nano-diamonds for the study of carbon condensation during detonation of high explosives

open access: yes, 2008
This paper describes the experimental studies of the formation of nano-diamonds during detonation of TNT/RDX 50/50 mixture with small-angle x-ray scattering (SAXS) method at a synchrotron radiation beam on VEPP-3 accelerator.
Aleshaev   +12 more
core   +1 more source

Black Diamonds at Brane Junctions [PDF]

open access: yes, 2000
We discuss the properties of black holes in brane-world scenarios where our universe is viewed as a four-dimensional sub-manifold of some higher-dimensional spacetime.
A. Chamblin   +18 more
core   +3 more sources

Voir dans la pierre

open access: yesRevue d'anthropologie des connaissances, 2020
This article puts forth the notion of visual refraction to analyze the subjective and technical construction of grading certificates in the global diamond trade.
Matthieu Bolay, Filipe Calvão
doaj   +1 more source

Pursuing colloidal diamonds

open access: yesNanoscale, 2023
The endeavor to selectively fabricate a cubic diamond is challenging due to the formation of competing phases such as its hexagonal polymorph or others possessing similar free energy. Here, we demonstrate how one can attain such selectivity.
Łukasz Baran   +3 more
openaire   +3 more sources

TO THE 100TH ANNIVERSARY OF MIKHAIL M. ODINTSOV, CORRESPONDING MEMBER OF THE USSR ACADEMY OF SCIENCES

open access: yesГеодинамика и тектонофизика, 2015
This article provides basic information about Mikhail M. Odintsov (1911–2011), Corresponding Member of the USSR Academy of Sciences, and his scientific, organizational and social activities.
Dmitry P. Gladkochub   +2 more
doaj   +1 more source

Policy Impacts on Africa’s Extractive Sector: Botswana, Diamond Dependence, and Diversification in the Post-Diamond Period

open access: yesRevue Gouvernance, 2018
This paper investigates the topic of sustainable natural resource governance, and policy and politics thereof, in the context of Botswana. The authors endeavour to provide a preliminary justification for why Botswana, as a country of investigation, is a ...
Hany Besada, Ben O’Bright
doaj   +1 more source

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