Proposed acousto-optic filter

Narrow band optical filter is electronically tunable over a large wavelength region. The filter utilizes collinear acousto-optic diffraction in an optically anisotropic media

Flax fibre: innovation and change in the early Neolithic: a technological and material perspective

Flax (Linum sp.) was one of the first domestic plants in Neolithic Europe, providing a potential cultivable source of fibres for the first farmers. As the plant provides both oil and fibre, it is a matter of enquiry as to whether the plant was first domesticated for its seeds or stem. Through examining new data collected by the EUROEVOL Project, UCL it is possible to chart the earliest archaeobotanical evidence for flax species in Europe. This provides the basis on which to consider the origin of fibres from the flax plant (linen) as a basis for change and innovation in the fibre resources used for textiles. These are then explored from a technological and material perspective. From a technological perspective I compare the chaîne opératoire of linen with contemporary sources of fibre, namely tree bast fibres and other wild resources in central and northern Europe. From a material perspective I consider the properties of flax and lime bast. Through these approaches this paper suggests that flax had a special role as a fibre domesticate in Europe, providing a versatile, valuable resource for the production and use of textiles during the Neolithic period

Counseling Customers: Emerging Roles for Genetic Counselors in the Direct-to-Consumer Genetic Testing Market

Individuals now have access to an increasing number of internet resources offering personal genomics services. As the direct-to-consumer genetic testing (DTC GT) industry expands, critics have called for pre- and post-test genetic counseling to be included with the product. Several genetic testing companies offer genetic counseling. There has been no examination to date of this service provision, whether it meets critics’ concerns and implications it may have for the genetic counseling profession. Considering the increasing relevance of genetics in healthcare, the complexity of genetic information provided by DTC GT, the mediating role of the internet in counseling, and potential conflicts of interest, this is a topic which deserves further attention. In this paper we offer a discourse analysis of ways in which genetic counseling is represented on DTC GT websites, blogs and other online material. This analysis identified four types of genetic counseling represented on the websites: the integrated counseling product; discretionary counseling; independent counseling; and product advice. Genetic counselors are represented as having the following roles: genetics educator; mediator; lifestyle advisor; risk interpreter; and entrepreneur. We conclude that genetic counseling as represented on DTC GT websites demonstrates shifting professional roles and forms of expertise in genetic counseling. Genetic counselors are also playing an important part in how the genetic testing market is taking shape. Our analysis offers important and timely insights into recent developments in the genetic counseling profession, which have relevance for practitioners, researchers and policy makers concerned with the evolving field of personal genomics. Keywords Genetic counseling Internet Direct-to-consumer genetic testing Discourse analysis

Investigation of laser dynamics, modulation and control by means of intra-cavity time varying perturbation

Work continued on a number of projects aimed at the generation of tunable visible, infrared, and ultraviolet light; and on the control of this light by means of novel mode-locking and modulation techniques. Progress is summarized for the following projects: (1) the transient modelocking of the Nd:YAG laser and application of short optical pulses; (2) studies of the sodium-xenon excimer laser; (3) development of techniques for vacuum ultraviolet holography; and (4) studies of multiple photon pumped xenon and argon excimer lasers

Investigation of laser dynamics, modulation and control by means of intra-cavity time varying perturbation Quarterly status report, 1 Feb. - 30 Apr. 1970

Tunable optical sources by means of nonlinear optical technique

Investigation of laser dynamics, modulation and control by means of intra-cavity time varying perturbation Semiannual status report

Laser dynamics, control, and stabilization of optical frequency radiatio

Illinois Campus Media Census Survey Questionnaire

The survey questionnaire used for live, on-site interviews during the Illinois Campus Media Census.Ope