—Absolute chronology of marine sediment beyond the C age range provides a test for models of climate change and has many other applications. U-Th techniques have been used for such chronology by dating corals, but extending these techniques to marine sediment is complicated by the presence of significant initial Th—both in detrital material and scavenged from seawater. In this study, we investi...

We have explored the diffusivity characteristics of radiogenic He in titanite (sphene) and have developed analytical techniques for (U–Th)/He dating of this mineral. Results of incremental He outgassing experiments performed on titanites from a variety of geological environments suggest a thermally activated volume diffusion mechanism with an activation energy of 44.6 6 3.4 (2s) kcal/mol and a ...

Translation of prepositions poses a very serious problem to machine translation because prepositions are highly ambigous. In theory prepo­ sitions can be disambiguated by a filter that excludes already generat­ ed representational objects with no selection restriction match between preposition and np, but it takes too long time in practice. A neurstl net­ work makes the disambiguation in fracti...

We measured (U–Th)/He ages of fayalite and hedenbergite phenocrysts with britholite and chevkinite inclusions from the ~1.6 Ma Otowi (Lower) Member of the Bandelier Tuff, Jemez Volcanic Field. U and Th, the major parent nuclides of radiogenic He, are concentrated in britholite and chevkinite inclusions and are essentially absent from the host grains. We analyzed 36 fayalite (21 non-abraded+15 a...

C am pus lo a d e rs c r i t i ­ cized s tu d e n t beh a v io r in Monday m o rn in g ’s d is tu r ­ bance a t M o n d a y a f t e r ­ n o o n ’ s C am pus L ife Council meeting, passing a re s o lu t io n c a l l in g th e b u rn in g o f lo fts , couches, du l ac and o th e r c o m ­ b u s tib le s “ ir re s p o n s ib le , d a n g e ro u s and to ta l ly un re llee tivc o f the g rea te r N...

M o b ile term ina ls su ch a s cellu la r p h o nes, sm a rt p h o nes a nd P D A s req u ire w ireless c o nnectio n to ex ch a ng e info rm a tio n w ith th e ex terna l w o rld . In th is tu to ria l w e fo c u s o n w ireless p a ck et netw o rk s b a sed o n th e IE E E 8 0 2 .1 1 b p ro to c o l, c o m m o nly u sed to b u ild lo c a l a rea netw o rk s o f p a lm to p a nd no teb o o k ...

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