منابع مشابه
Genes, Eyeglasses, and Social Policy
Someone reading empirical research relating human genetics to personal outcomes must be careful to distinguish two types of work. An old literature on heritability decomposes cross-sectional variation in observed outcomes into unobservable genetic and environmental components. A new literature measures specific genes and use them as observed covariates when predicting outcomes. Manski discusses...
متن کاملWISEglass: Smart eyeglasses recognising context
We investigated how regular eyeglasses could be extended with multi-modal sensing and processing functions to support context-awareness applications. Our aim was to leverage eyeglasses as a platform for acquiring and processing context information according to the wearer’s needs. The WISEglass architecture consists of inertial motion, environmental light, and pulse sensors, processing and wirel...
متن کاملEarly prints depicting eyeglasses.
Much of the history of eyeglasses has been gleaned from studies of paintings and prints that illustrate them. A few prints from the first century of printing include spectacles and are reproduced in this article. In addition to showing their form and method of use, these prints also illustrate their symbolic value.
متن کاملInfection risk from surgeons' eyeglasses.
PURPOSE To assess bacterial contamination of 20 eyeglasses from surgeons. METHODS 40 samples were taken from the nose pad (n=20) and earpiece (n=20) of 20 eyeglasses from orthopaedic surgeons using a sterile swab stick soaked in sterile distilled water. Swabs were incubated and inoculated onto 3 plates: Staphylococcus/Streptococcus agar plate, Mannitol salt plate, and Chromogenic agar plate. ...
متن کاملProduct Variety and Competition in the Retail Market for Eyeglasses
I analyze an original dataset on the display inventories of several hundred eyewear retailers to study how firms’ product-range choices depend on separation from rivals in geographically-differentiated markets. A two-stage estimation approach is used, employing Seim’s (2002) structural entry model for firms’ first-stage location choices, followed by reduced-form store-level variety regressions....
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ژورنال
عنوان ژورنال: Nature
سال: 1928
ISSN: 0028-0836,1476-4687
DOI: 10.1038/121137b0