From Schouten to Mackenzie: Notes on brackets

A New Look at the Schouten-Nijenhuis, Frölicher-Nijenhuis and Nijenhuis-Richardson Brackets for Symplectic Spaces

In this paper we re-express the Schouten-Nijenhuis, the Frölicher-Nijenhuis and the Nijenhuis-Richardson brackets on a symplectic space using the extended Poisson brackets structure present in the path-integral formulation of classical mechanics.

Looking Back to Mackenzie.

Notes on Dictyuchus species (Stramenopila, Oomycetes) from Anzali lagoon, Iran

Nine Dictyuchus isolates were obtained from floating and decaying twigs and leaves in Anzali lagoon, Anzali County, Guilan province, Iran. They are interestingly distinguished from current Dictyuchus species by the presence of dictyoid and achlyoid type of zoospore discharge, abundant fusiform and spherical gemma, and the absence of any sexual apparatus. In addition, phylogene...

Notes on some Encyrtidae (Hymenoptera: Chalcidoidea) from Iran

زنبور‌های خانواده‌یEncyrtidae از عوامل موفق در کنترل آفات گیاهی و به ویژه شپشک‌های آرد‌آلود می‌باشند. در مطالعات انجام شده در سال‌های 85-1381 که به منظور شناسایی پارازیتوییدهای شپشک‌های آردآلود در استان فارس انجام گرفت، از این خانواده و زیرخانواده‌ی Tetracneminae، گونه‌های Gyranusoidea indica Shafee, Alam & Agarwal از روی شپشک آرد‌آلود Maconellicoccus hirsutus (Green) روی توت سفید در جهرم،Anagy...

Lessons from Mackenzie that still resonate.

INTRODUCTION Sir James Mackenzie (1852–1925) is known as ‘the father of general practice-based research’.2 From humble origins in rural Perthshire, Mackenzie overcame early social and educational hurdles to study medicine in Edinburgh, then pursued a career in general practice in Burnley. He initiated the systematic observation of his patients that led to his stellar research career, including ...