منابع مشابه
Letters and Comments
Geng and Cai suggested a modified He’s frequency–amplitude formulation for nonlinear oscillators (Geng and Cai 2007 Eur. J. Phys. 28 923–31). We point out the accuracy of both the original one and the modified version depends upon the chosen location point, and so far we have no general rule for the location choice. The method of weighted residuals is suggested to overcome the shortcoming.
متن کاملComments and Letters to the Editor
Several contrasting uses of the terms macro(large) and micro(small) pore can be identified in soil science literature. In some cases macropores are (i) considered to be pores > 15 (Marshall, 1959) or 100 /im in diam (Bouma et al., 1977) or (ii) implied to be even larger when described in terms of wormholes (Ehlers, 1975), root channels (Aubertin, 1971). and shrinkage cracks (Lewis, 1977). The s...
متن کاملLetters and Comments/lettres Et Commentaires
Succession is the sequence of changes that occur on a site after a disturbance. In desert streams, flash floods evince high mortality among biota, largely by scouring fine gravel substrates, and interflood periods are marked by pronounced, rapid change in a host of attributes, that is, succession occurs (Fisher et al. 1982). 1 proposed (Fisher 1983) that this pattern may not occur in New Englan...
متن کاملLetters, we've got letters...
So, you want to write a letter to the editor? A recent editorial by Golub in JAMA prompted us to outline more fully our vision of Annals of Emergency Medicine’s Correspondence section and its place within the journal and the peer review process. Like most peer-reviewed publications, Annals of Emergency Medicine contains a correspondence section, commonly known as Letters to the Editor. Journals...
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“Fronti Nulla Fides”: No reliance can be placed on appearance. In a letter to the editor (AI Mugazine, Winter 1989), Benjamin Kuipers criticizes various points made in an earlier paper of ours (Akman and ten Hagen 1989). First, a side (nonetheless important) remark: Although Kuipers asserts that he distributes QSIM to interested researchers, our experience has been otherwise. Akman has tried tw...
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ژورنال
عنوان ژورنال: Journal of Fluids Engineering
سال: 1975
ISSN: 0098-2202,1528-901X
DOI: 10.1115/1.3447221