The use of linear dichroism in forensic fibre examinations — Part 6. Validation and practical aspects of MSP-PPL

This paper summarizes the results of previous work on the microscopic observation of linear dichroism found in dyed fibres (polyesters, polyamides, wool, silk, cotton, viscose, acrylics and acetates) and in pigmented fibres as well as the measurements on these fibre classes using microspectrophotometry with plane polarized light (MSP-PPL). The validation of this method is discussed and a practical tool is proposed for comparing fibre traces with control fibres. The limitations and strengths of this method are also revised.     

Coal and nuclear technologies: creating a false dichotomy for American energy policy

The American electric utility industry is entering a moment of transition. Once viewed as a stable and secure consortium of publicly regulated monopolies that produce and distribute electricity, the industry has weathered market restructuring only to face the ever-present risk of natural disasters, price fluctuations, terrorist attacks, and blackouts. This paper uses five criteria—technical feasibility, cost, negative externalities, reliability, and security—to evaluate the broad portfolio of energy technologies available to American electricity policymakers. Upon close inspection, energy efficiency practices, renewable energy systems, and small-scale distributed generation technologies appear to offer many advantages over large and centralized nuclear and fossil fueled generators. Contrary to the mimetic commentary produced by the media, these three approaches would present policymakers a superior alternative for curbing electricity demand, minimizing the risk of fuel interruptions and shortages, helping improve the fragile transmission network, and reducing environmental harm