Effect of Additional Reference Current in a Reference Junction-Double Relaxation Oscillation SQUID (RJ-DROS)

2007 ◽  
Vol 17 (1) ◽  
pp. 13-19 ◽  
Author(s):  
Jin-Mok Kim ◽  
Yong-Ho Lee ◽  
Hyukchan Kwon ◽  
Kiwoong Kim ◽  
Ichiro Sasada
Keyword(s):  
Relaxation Oscillation ◽  
Additional Reference ◽  
Reference Junction

Double relaxation oscillation SQUID with reference junction for biomagnetic multichannel applications

1997 ◽  
Vol 5 (7-12) ◽  
pp. 413-418 ◽  
Author(s):  
Y.H. Lee ◽  
H.C. Kwon ◽  
J.M. Kim ◽  
Y.K. Park ◽  
J.C. Park
Keyword(s):  
Relaxation Oscillation ◽  
Reference Junction

scholarly journals Cycles in Stone Mining and Copper Circulation in Europe 5500–2000 bc: A View from Space

2020 ◽  
pp. 1-22
Author(s):  
Peter Schauer ◽  
Stephen Shennan ◽  
Andrew Bevan ◽  
Sue College ◽  
Kevan Edinborough ◽  
...  
Keyword(s):  
Western Europe ◽  
General Pattern ◽  
Exchange Networks ◽  
Broad Perspective ◽  
Radiocarbon Dates ◽  
Copper Mines ◽  
The One ◽  
Demographic Trajectories ◽  
Additional Reference ◽  
The Relationship

The authors of this article consider the relationship in European prehistory between the procurement of high-quality stones (for axeheads, daggers, and other tools) on the one hand, and the early mining, crafting, and deposition of copper on the other. The data consist of radiocarbon dates for the exploitation of stone quarries, flint mines, and copper mines, and of information regarding the frequency through time of jade axeheads and copper artefacts. By adopting a broad perspective, spanning much of central-western Europe from 5500 to 2000 bc, they identify a general pattern in which the circulation of the first copper artefacts was associated with a decline in specialized stone quarrying. The latter re-emerged in certain regions when copper use decreased, before declining more permanently in the Bell Beaker phase, once copper became more generally available. Regional variations reflect the degrees of connectivity among overlapping copper exchange networks. The patterns revealed are in keeping with previous understandings, refine them through quantification and demonstrate their cyclical nature, with additional reference to likely local demographic trajectories.

Flux to voltage transfer function and noise in double relaxation oscillation SQUIDs

1997 ◽  
Vol 7 (2) ◽  
pp. 3477-3480
Author(s):  
GengHua Chen ◽  
HongYing Zhai ◽  
QianSheng Yang
Keyword(s):  
Transfer Function ◽  
Relaxation Oscillation

scholarly journals Silicon isotopes in Antarctic sponges: an interlaboratory comparison

2010 ◽  
Vol 23 (1) ◽  
pp. 34-42 ◽  
Author(s):  
Katharine R. Hendry ◽  
Melanie J. Leng ◽  
Laura F. Robinson ◽  
Hilary J. Sloane ◽  
Jerzy Blusztjan ◽  
...  
Keyword(s):  
Southern Ocean ◽  
Matrix Effects ◽  
Global Climate ◽  
Intermediate Water ◽  
Silicon Isotopes ◽  
Important Player ◽  
Si Isotopes ◽  
Si Isotope ◽  
Additional Reference ◽  
Antarctic Sponges

AbstractCycling of deepwater silicon (Si) within the Southern Ocean, and its transport into other ocean basins, may be an important player in the uptake of atmospheric carbon, and global climate. Recent work has shown that the Si isotope (denoted by δ29Si or δ30Si) composition of deep sea sponges reflects the availability of dissolved Si during growth, and is a potential proxy for past deep and intermediate water silicic acid concentrations. As with any geochemical tool, it is essential to ensure analytical precision and accuracy, and consistency between methodologies and laboratories. Analytical bias may exist between laboratories, and sponge material may have matrix effects leading to offsets between samples and standards. Here, we report an interlaboratory evaluation of Si isotopes in Antarctic and sub-Antarctic sponges. We review independent methods for measuring Si isotopes in sponge spicules. Our results show that separate subsamples of non-homogenized sponges measured by three methods yield isotopic values within analytical error for over 80% of specimens. The relationship between δ29Si and δ30Si in sponges is consistent with kinetic fractionation during biomineralization. Sponge Si isotope analyses show potential as palaeoceaongraphic archives, and we suggest Southern Ocean sponge material would form a useful additional reference standard for future spicule analyses.

scholarly journals 3-channel double relaxation oscillation SQUID magnetometer system with simple readout electronics

1995 ◽  
Vol 5 (2) ◽  
pp. 2156-2159 ◽  
Author(s):  
Y.H. Lee ◽  
J.M. Kim ◽  
H.C. Kwon ◽  
Y.K. Park ◽  
J.C. Park ◽  
...  
Keyword(s):  
Relaxation Oscillation ◽  
Squid Magnetometer ◽  
Readout Electronics

Measurement of Informal Selection Processes

1967 ◽  
Vol 25 (2) ◽  
pp. 421-436
Author(s):  
Rayman W. Bortner
Keyword(s):  
Discriminant Function ◽  
Discriminant Function Analysis ◽  
Function Analysis ◽  
Community Sample ◽  
Reference Points ◽  
Self Concept ◽  
Selection Processes ◽  
Step Down ◽  
Eligibility Requirements ◽  
Additional Reference

When statements of formal eligibility requirements fail to account for the characteristics of institutional populations, there is a tendency to resort to speculative explanations. This study examined some methods for empirical evaluations of these speculative notions. Univariate and step-down analyses did not aid in conceptualizing informal selection processes in this study; a discriminant function analysis seemed to provide an adequate approach to a synthesis. The method was illustrated by examining definable subsamples in a VA domiciliary which were compared with a non-institutional, community sample; means of the standardization samples for the tests used provided additional reference points for comparison. For these particular subsamples from this institution, alterations in self concept appeared to provide the single unifying theme which best integrated the diverse differences among the groups.

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