MORE ON SINGING SANDS
نویسندگان
چکیده
منابع مشابه
New focus on tar sands
By many analyses, we shall soon be approaching 'peak oil' production — the time when annual output begins to stall in the face of ever-increasing demand. Oil companies are therefore increasing efforts to locate new sources and, in the face of the large-scale environmental problems caused by the failure of a deep-drilling operation in the Gulf of Mexico, the successful development of Canada's ta...
متن کاملLow down on the singing
The male European starling is well known for its diverse range of song phrases, some of which have sometimes been recognizably poached from those of other species and even from anthropogenic sources: it is not entirely unusual to hear the odd telephone ringtone or car alarm amongst their complex songs. There’s evidence that the wide range of the bird’s song phrases provide an indication of a ma...
متن کاملBuilding a Sea Urchin on Shifting Sands
Constructing a multicellular organism from scratch is a staggeringly challenging task. It seems even more miraculous when you consider that it’s actually entirely orchestrated by a few thousand genes and their protein products, acting (largely autonomously) within each one of the rapidly dividing cells. The most crucial of these genes and proteins regulate each other in intricately interconnect...
متن کامل"Footprints on the sands of time".
The author's reflections on Becky's legacy (see Werth, this issue) revolve around the idea that she can serve as a role model and that Becky's and Jim's experiences provide guidance to others who will inevitably go through the dying process. She also highlights several themes she saw in Werth's article: a cultural revolution around dying, the individuality of the dying experience, the need to e...
متن کاملA Constitutive Model for Sands
In this paper, an elastoplastic constitutive model is presented for predicting sandy soil behavior under monotonic and cyclic loadings. The model is based on the CJS3 model that takes into account deviatoric and isotropic mechanisms of plasticity. The flow rule in deviatoric mechanism is non-associated and a kinematic hardening law controls the evolution of the yield surface. In the present s...
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ژورنال
عنوان ژورنال: Science
سال: 1920
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.51.1307.64