The role of nuclear geophysics in the location of base metals in boreholes

1971 ◽  
Vol 9 (2-3) ◽  
pp. 166
Author(s):  
A.W. Wylie
Crystals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1013
Author(s):  
Stefanie Gärtner

Alkali metal thallides go back to the investigative works of Eduard Zintl about base metals in negative oxidation states. In 1932, he described the crystal structure of NaTl as the first representative for this class of compounds. Since then, a bunch of versatile crystal structures has been reported for thallium as electronegative element in intermetallic solid state compounds. For combinations of thallium with alkali metals as electropositive counterparts, a broad range of different unique structure types has been observed. Interestingly, various thallium substructures at the same or very similar valence electron concentration (VEC) are obtained. This in return emphasizes that the role of the alkali metals on structure formation goes far beyond ancillary filling atoms, which are present only due to charge balancing reasons. In this review, the alkali metals are in focus and the local surroundings of the latter are discussed in terms of their crystallographic sites in the corresponding crystal structures.


1991 ◽  
Vol 251 ◽  
Author(s):  
John V. Niska ◽  
Bengt Loberg

ABSTRACTThe bismuth-based 2212 and 2223 superconductors and the yttrium-based 123 and 124 high Tc superconductors are oxide ceramics, so that oxidizing conditions must be maintained in the HIP to avoid oxygen loss and decomposition. This has been done in an argon gas HIP by using glass encapsulation, but internal gas pressure retards densification. The thermodynamics of the release of oxygen by the superconductive ceramics and the stability of the metal to oxygen can be shown on a free energy diagram (Ellingham diagram). The base metals (as Fe and Cu) are reactive with respect to superconductive ceramics but not silver.


2020 ◽  
pp. 141-151
Author(s):  
Olena I. Ivanenko ◽  
Yulia A. Sagaydack

The maіn purpose of thіs research іs to assess the level of development and balance of foreіgn trade іn goods. To achіeve thіs goal, the followіng tasks were set: to analyze export-іmport operatіons and the maіn іndіcators that characterіze the level of development of foreіgn trade. The paper uses general scіentіfіc and specіal methods, whіch were used to study the processes and phenomena іn theіr іnterrelatіon. The theoretіcal basіs of the study were the fundamental poіnts of the scіentіfіc works of famous scіentіsts, statіstіcal reports. The foreіgn trade of Ukraіne іs conducted, the maіn іndіcators of іts development trends are calculated, іn partіcular, exports, іmports іn commodіty and geographіcal terms, Ukraіne's foreіgn trade turnover, the country's partіcіpatіon іn foreіgn trade and іts potentіal are analyzed. The maіn partner countrіes have been іdentіfіed and іnvestіgated. Іt was found that the largest shares of exports of product groups іn 2019 were products of anіmal and vegetable orіgіn, base metals and artіcles thereof, and the smallest – products of the chemіcal and related іndustrіes. The largest іmports are machіnery, equіpment and mechanіsms, electrіcal equіpment. The maіn trends and changes іn export-іmport operatіons and the factors that determіne them are іndіcated. The ways and dіrectіons of expandіng the export potentіal are defіned. Іt іs determіned that under the іnfluence of changes іn world commodіty markets and geopolіtіcal processes durіng the last decade there has been a sіgnіfіcant transformatіon of Ukraіne's foreіgn trade іn both regіonal and commodіty terms. Among the maіn trends іs the іncreasіng role of European countrіes as a tradіng partner. The only regіon wіth whіch trade volumes have decreased over the last decade were the CІC countrіes, prіmarіly due to the Russіan Federatіon. Key words: balance of foreіgn trade, foreіgn trade, assessment of foreіgn trade.


JAMA ◽  
1966 ◽  
Vol 195 (12) ◽  
pp. 1005-1009 ◽  
Author(s):  
D. J. Fernbach
Keyword(s):  

JAMA ◽  
1966 ◽  
Vol 195 (3) ◽  
pp. 167-172 ◽  
Author(s):  
T. E. Van Metre

2018 ◽  
Vol 41 ◽  
Author(s):  
Winnifred R. Louis ◽  
Craig McGarty ◽  
Emma F. Thomas ◽  
Catherine E. Amiot ◽  
Fathali M. Moghaddam

AbstractWhitehouse adapts insights from evolutionary anthropology to interpret extreme self-sacrifice through the concept of identity fusion. The model neglects the role of normative systems in shaping behaviors, especially in relation to violent extremism. In peaceful groups, increasing fusion will actually decrease extremism. Groups collectively appraise threats and opportunities, actively debate action options, and rarely choose violence toward self or others.


2018 ◽  
Vol 41 ◽  
Author(s):  
Kevin Arceneaux

AbstractIntuitions guide decision-making, and looking to the evolutionary history of humans illuminates why some behavioral responses are more intuitive than others. Yet a place remains for cognitive processes to second-guess intuitive responses – that is, to be reflective – and individual differences abound in automatic, intuitive processing as well.


2020 ◽  
Vol 43 ◽  
Author(s):  
Stefen Beeler-Duden ◽  
Meltem Yucel ◽  
Amrisha Vaish

Abstract Tomasello offers a compelling account of the emergence of humans’ sense of obligation. We suggest that more needs to be said about the role of affect in the creation of obligations. We also argue that positive emotions such as gratitude evolved to encourage individuals to fulfill cooperative obligations without the negative quality that Tomasello proposes is inherent in obligations.


2020 ◽  
Vol 43 ◽  
Author(s):  
Andrew Whiten

Abstract The authors do the field of cultural evolution a service by exploring the role of non-social cognition in human cumulative technological culture, truly neglected in comparison with socio-cognitive abilities frequently assumed to be the primary drivers. Some specifics of their delineation of the critical factors are problematic, however. I highlight recent chimpanzee–human comparative findings that should help refine such analyses.


2020 ◽  
Vol 43 ◽  
Author(s):  
Thomas Parr

Abstract This commentary focuses upon the relationship between two themes in the target article: the ways in which a Markov blanket may be defined and the role of precision and salience in mediating the interactions between what is internal and external to a system. These each rest upon the different perspectives we might take while “choosing” a Markov blanket.


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