Results 261 to 270 of about 567,993 (282)
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Australian Archaeology, 1992
Distinguishing natural accumulations of shell from Aboriginal shell middens is a problem often faced by archaeologists working in coastal regions (Attenbrow 1984; Ceci 1984; Dortch 1991; McBryde 1973; Statham 1892). I recently investigated two buried layers of shell which their discoverers thought could be Aboriginal shell middens.
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Distinguishing natural accumulations of shell from Aboriginal shell middens is a problem often faced by archaeologists working in coastal regions (Attenbrow 1984; Ceci 1984; Dortch 1991; McBryde 1973; Statham 1892). I recently investigated two buried layers of shell which their discoverers thought could be Aboriginal shell middens.
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OFF-SHELL NILPOTENCY FOR ON-SHELL REDUCIBILITY
Modern Physics Letters A, 1992The direct way of Lagrangian BRS gauge-fixing we proposed recently is applied to reducible gauge theories; antisymmetric tensor gauge theories are considered as definite examples. It enables us to do without ad hoc ghosts for ghosts. It also achieves BRS-exact forms of full gauge-fixing terms by means of off-shell nilpotent BRS transformations.
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Closed-Shell and Open-Shell 2D Nanographenes
2012This chapter describes a series of two-dimensional (2D) expanded arene networks, also known as nanographenes, with either closed-shell or open-shell electronic structure in the ground state. These systems are further categorized into three classes on a basis of different edge structures: those with zigzag edges only, those with armchair edges only, and
Zhe, Sun, Jishan, Wu
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Core-Shell-Corona Micelles with a Responsive Shell
Angewandte Chemie International Edition, 2001A reactor for the synthesis of gold nanoparticles is one of the uses of a poly(styrene)-block-poly(2-vinylpyridine)-block-poly(ethylene oxide) triblock copolymer (PS-b-P2VP-b-PEO) which forms core-shell-corona micelles in water. Very low polydispersity spherical micelles are observed that consist of a PS core surrounded by a pH-sensitive P2VP shell and
Gohy, Jean-François +4 more
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Shell Molding and Shell Coremaking
2008Abstract Shell molding is used for making production quantities of castings that range in weight from a few ounces to approximately 180 kg (400 lb), in both ferrous and nonferrous metals. This article lists the limitations or disadvantages of shell mold casting. It describes the two methods for preparation of resin-sand mixture for shell
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