Given a set of compact sites on a sphere, we show that their spherical Voronoi diagram can be computed by computing two planar Voronoi diagrams of suitably transformed sites in the plane. We also show that a planar furthest-site Voronoi diagram can always be obtained as a portion of a nearest-site Voronoi diagram of a set of transformed sites. Two immediate applications are an O(n logn) algorit...

We consider the problem of delay estimation in an asyn-chronous wireless CDMA communication system. The received observations are decomposed into orthogonal signal and noise subspaces via the singular value decomposition (SVD). A class of techniques known as subspace tting techniques is used to estimate the individual user delays by maximizingthe t between the signal subspace and the observed d...

Ultrastructural studies of chick embryo cells morphological ly altered by strain MC29 avian leukosis virus revealed marked and characteristic differences from normal cells and cells al tered by infection with other avian tumor viruses. Such differ ences were manifest in part in the cytoplasm by high content of free ribosomes, poorly developed rough endoplasmic reticu lum, frequent fat droplets,...

A novel type of multicellular spheroids was established and character ized with regard to growth behavior, proliferation, and differentiation. The spheroids were grown from clonal rat rhabdomyosarcoma cells using the spinner flask technique. The cell aggregates showed several unique properties that were different from those observed in most of the spher oids investigated to date. These properti...

A rapid, accurate, simple, and reproducible high performance liquid chromatographic (HPLC) method for the determination of oxytetracycline hydrochloride (OTC) in porcine plasma has been developed and validated. The drug and the standard were eluted from 5 μm Omni Spher (Varian) C18 column (250 mm × 4.6 mm I.D.) at room temperature. The mobile phase was composed of ACN-MeOH-(HCOO)2 (17.5:17.5:65...

The coherent contribution of all neutrons in neutrino nucleus scattering due to the neutral current offers a realistic prospect of detecting supernova neutrinos. As a matter of fact. for a typical supernova at 10 kpc, about 1000 events are expected using a spherical gaseous detector of radius 4 m and employing Xe gas at a pressure of 10 Atm. We propose a world wide network of several such simpl...

I.SI74T human colon adenocarcinoma multiceli spheroids were used to study the radiobiological aspects of radioimmunotherapy. The spher oids were incubated in "'I-anticardnocmbrymmantigen (B7) at an antibody concentration of 0.5 ftg/ml and at "'I concentrations of 2.5 and 7.5 fiCi/ml. After incubation times of 90 h, clonogenic cells per spheroid were reduced by 1400-fold and 23-fold at the high ...

N u c l e a r m a g n e t i c re laxat ion in d i lute gases o f spher i ca l and s y m m e t r i c t op m o l e c u l e s is c o n s i d e r e d f r o m the po int of v iew of the k ine t i c theory o f transport and re laxat ion e q u a t ions b a s e d on the W a l d m a n n S n i d e r equat i on . T h e der ivat ion of the f o r m of the sp in-rotat ion H a m i l t o n i a n in the a b s e...

T h e connec t ion b e t w e e n p l a n e w a v e a n d spher ica l w a v e s c a t t e r i n g f rom a n in f in i t e ly cyl indr ica l ob jec t is i nves t iga t ed . If t h e d i s t a n c e of t h e source a n d t h e obse rve r f r o m t h e axis of t h e cy l inder a re d e n o t e d b y eo a n d Q, respec t ive ly , t h e ra t io of t h e s ca t t e r ed field to t h a t for p l a n e ...