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The essential nature of selenium as well as its toxicity depend on the concentration and the chemical forms in which this element is present in environmental and biological samples. Dissolved inorganic selenium can be found in natural waters and soils as selenides, selenite and selenate. Organoselenium compounds that may be present in air, soils and plants are volatile methylselenides, trimethy...

BIL 717 Image Processing

• Example: " label smoothing " grid Unary potential 0 1 0 0 K 1 K 0 Pairwise Potential 0:-logP(y i = 0 ; data) 1:-logP(y i = 1 ; data) ∑ ∑ ∈ + = edges j i j i i i data y y data y data Energy , 2 1 Main idea: • Construct a graph such that every st-cut corresponds to a joint assignment to the variables y • The cost of the cut should be equal to the energy of the assignment, E(y; data) *. • The mi...

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Limited to Ergodic Bil l iards

Abs t rac t , Sufficient conditions are found so that a family of smooth Hamiltonian flows limits to a billiard flow as a parameter e --~ 0. This limit is proved to be C 1 near non-singular orbits and C o near orbits tangent to the billiard boundary. These results are used to prove that scattering (thus ergodic) billiards with tangent periodic orbits or tangent homoclinic orbits produce nearby ...

Wavelength (å)

We present near-infrared (observed frame) spectra of the high-redshift quasar S4 0636+68 at z = 3.2 which was previously thought to be one of a group of “strong” Fe II emitters (i.e., F (Fe IIλλ4434–4684)/F (Hβ) > 1). Our K-band spectrum clearly shows emission lines of Hβ and [O III]λλ4959, 5007 as well as optical Fe II emission. Our computed value of F (Fe II λλ4434–4684)/F (Hβ) ≃ 0.8 for S4 0...