Part mounting revisited

Having been involved with single point diamond turning since the 1960's; I share with others of my age, a unique perspective of the craft. I am amazed at how the fundamentals seem to be forgotten or misplaced, and need to be re emphasized and re learned. Each new precision machine operator not only needs to re learn (many times the hard way), these fundamentals, but seems to inherit all the folklore; good and bad, from his predecessor. Let me explain. I spend some of my time as a consultant to the shops' division at the Los Alamos National Laboratory, at which there are five precision turning machines divided between two buildings. The main shop area houses an old friction way (hydrodynamic) turning Machine. The base of this turning machine is made from the base of an old Moore measuring machine. The air bearing spindle, a Red Head'' was made by the Heald Machine Tool Co. With the addition of an Allen-Bradley Numerical control system, this machine has become a work horse, used primarily to make smooth flat surfaces in the fly-cutting mode. Recently, I became involved in the evaluation and repair of the machine as it no longer produced smooth surfaces. Smooth surfaces are not the point of this narrative, accurate geometry however is

Survey of antibiotic test methods for raw milk

Originally published 1999, reprinted with revisions 2001. Title from coverAvailable from British Library Document Supply Centre- DSC:m03/11686 / BLDSC - British Library Document Supply CentreSIGLEGBUnited Kingdo

How deregulation, drought and increasing fire impact Amazonian biodiversity

Biodiversity contributes to the ecological and climatic stability of the Amazon Basin, but is increasingly threatened by deforestation and fire. Here we quantify these impacts over the past two decades using remote-sensing estimates of fire and deforestation and comprehensive range estimates of 11,514 plant species and 3,079 vertebrate species in the Amazon. Deforestation has led to large amounts of habitat loss, and fires further exacerbate this already substantial impact on Amazonian biodiversity. Since 2001, 103,079–189,755 km2 of Amazon rainforest has been impacted by fires, potentially impacting the ranges of 77.3–85.2% of species that are listed as threatened in this region. The impacts of fire on the ranges of species in Amazonia could be as high as 64%, and greater impacts are typically associated with species that have restricted ranges. We find close associations between forest policy, fire-impacted forest area and their potential impacts on biodiversity. In Brazil, forest policies that were initiated in the mid-2000s corresponded to reduced rates of burning. However, relaxed enforcement of these policies in 2019 has seemingly begun to reverse this trend: approximately 4,253–10,343 km2 of forest has been impacted by fire, leading to some of the most severe potential impacts on biodiversity since 2009. These results highlight the critical role of policy enforcement in the preservation of biodiversity in the Amazon