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Blind proficiency testing is ideal for testing crime laboratory personnel because the elements of analyst bias and anticipation are removed. However, sending proficiency tests through the laboratory system as real casework is difficult. The substantial challenges with preparing and administering blind tests may prevent laboratory managers from initiating blind testing. In 2015, the Harris County Institute of Forensic Sciences committed to improving its crime laboratory's proficiency testing program by adding blind tests. The goal was to test the whole system, from evidence receipt to report release. With careful planning, trial-and-error, and ongoing assessment of available resources, not only was the program proven to be feasible, but there was also clear understanding of how to optimize our program. In this article, we share our experiences, lessons learned, and program details to assist other forensic service providers with developing their own blind testing programs, which would ultimately lead to improved quality assurance.

Integrated optoelectronic sensors hold much potential for bio-medical applications. Our work focuses on the use of semiconductor lasers, photodetectors and filters to create a monolithically integrated near-infrared fluorescence sensor. Previous research has found that the close integration of these components results in large laser background levels from spontaneous emission emitted from the side of the laser and limits sensor sensitivity. This work presents an improved optical blocking structure between the laser and photodetector which results in greater than 10(6) optical isolation. This level of isolation will allow for sensitive fluorescence detection and shows that optoelectronic components can be successfully integrated for such purposes.

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