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In the mid-1970s, theoretical ecologists were responsible for stimulating interest in nonlinear dynamics and chaos. Ironically, the importance of chaos in ecology itself remains controversial. Proponents of ecological chaos point to its ubiquity in mathematical models and to various empirical findings. Sceptics maintain that the models are unrealistic and(More)
Worldwide there is no general attitude on optimal surgical procedure in treatment of primary non-ampullary adenocarcinoma of duodenum, especially for early stage of duodenal cancer. Some authors prefer local excision and segmental resection while others rather perform duodenopancreatic resection, even in the case of early stage of duodenal cancer with aim(More)
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