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FAST LANE FOR TELECOMMUNICATION VLSI CIRCUIT DESIGN
Adams, J.,Sevenhans, J.,Guebels, P. 대한전자공학회 1989 ICVC : International Conference on VLSI and CAD Vol.1 No.1
Three design approaches for implementing telecommunication VLSI circuits in a fast and still cost effective way are discussed the core processor methodology, the application oriented processor architecture and the true silicon compilation. The most important trade-off arguments to be considered are development cost, development speed ind practical system constraints on power and size.
Are tropical butterflies more colorful?
Adams, Jonathan M.,Kang, Changku,June‐,Wells, Mark Springer Japan 2014 Ecological research Vol.29 No.4
<P><B>Abstract</B></P><P>There is a common and long‐standing belief that tropical butterflies are more striking in their coloration than those of cooler climates. It has been suggested that this is due to more intense biotic selection or mate selection in the tropics. We tested whether there were differences in coloration by examining the dorsal surface color properties of male butterflies from three regions of the western hemisphere: the Jatun‐Satcha Reserve in lowland Ecuador (tropical), the state of Florida, USA (subtropical) and the state of Maine, USA (cool temperate). We digitally photographed the dorsal wing and body surface of male butterfly specimens from Maine, Florida, and Ecuador. For each photograph, we analyzed the mean and variation for the color‐parameters that are thought to be related to colorfulness; namely Hue, saturation and intensity. Overall, the Ecuadorian sample exhibited more varied intensity, saturation, and Hue compared to the other regions. These results suggest a more complex assemblage of colors and patterns regionally and on a butterfly‐by‐butterfly basis in the tropics. The greater complexity of colors within each butterfly in our Ecuadorian sample suggests that tropical butterflies are indeed more ‘colorful’, at least by some measures. Possible reasons for this include stronger predation pressure selecting for aposematism, greater species diversity selecting for camouflage or warning coloration against potential predators, and easier recognition of potential mates in a species rich environment.</P>