Low-speed wind-tunnel investigation of wing fins as trailing-vortex-alleviation devices on a transport airplane model

The trailing-vortex-alleviation effectiveness of both a one- and a two-fin configuration (semicircular with a radius of 0.043 semispan) on a jumbo-jet transport airplane model in its landing configuration was investigated in the Langley V/STOL tunnel, by the trailing-wing sensor technique. The fins were located on the upper surface of the transport model wing along the 30-percent-chord line. The fin configurations were effective in reducing the vortex-induced rolling moment, by amounts varying from 28 to 60 percent, on the trailing wing model located at a distance of 7.8 transport model wing spans downstream of the transport model. The flow over the fins and over the transport airplane model wing downstream of the fins was observed to be separated and turbulent. All fin configurations caused a reduction in maximum lift coefficient, a positive increment in drag coefficient, and an increment in nose-up pitching-moment coefficient on the transport airplane model

Patent-Eligible Processes: An Audience Perspective

Many of the problems with modern patent-eligibility analysis can be traced back to a fundamental philosophical divide between judges who treat eligibility as the primary tool for effectuating patent policy and those who take patent-eligibility as nothing more than a coarse filter to be invoked in rare cases. After several years in which the coarse filter approach seemed to have the upper hand, the eligibility-as-king approach now is firmly in ascendancy. This Article resists that trend, exploring more centrist approaches to patent-eligibility, particularly in the context of process inventions. This Article first examines the practice of undertaking an eligibility analysis with no antecedent claim construction; then concludes that this practice is problematic, drawing on the authors\u27 prior work concerning the design of patent law rules in view of the audience for those rules. This Article also assesses the unfortunate renaissance of the inventive concept inquiry, arguing that the Court\u27s new embrace of that inquiry is a mistake that permits judges to privilege eligibility to the virtual exclusion of all other patentability doctrines

Patent-Eligible Processes: An Audience Perspective

Many of the problems with modern patent-eligibility analysis can be traced back to a fundamental philosophical divide between judges who treat eligibility as the primary tool for effectuating patent policy and those who take patent-eligibility as nothing more than a coarse filter to be invoked in rare cases. After several years in which the coarse filter approach seemed to have the upper hand, the eligibility-as-king approach now is firmly in ascendancy. This Article, resists that trend, exploring more centrist approaches to patent-eligibility, particularly in the context of process inventions. This Article first examines the practice of undertaking an eligibility analysis with no antecedent claim construction; then concludes that this practice is problematic, drawing on the authors\u27 prior work concerning the design of patent law rules in view of the audience for those rules. This Article also assesses the unfortunate renaissance of the inventive concept inquiry, arguing that the Court\u27s new embrace of that inquiry is a mistake that permits judges to privilege eligibility to the virtual exclusion of all other patentability doctrines

Science lives: School choices and ‘natural tendencies’

An analysis of 12 semi-structured interviews with university-based scientists and non-scientists illustrates their life journeys towards, or away from, science and the strengths and impact of life occurrences leading them to choose science or non-science professions. We have adopted narrative approaches and used Mezirow's transformative learning theory framework. The areas of discussion from the result have stressed on three main categories that include ‘smooth transition’, ‘incremental wavering transition' and ‘transformative transition’. The article concludes by discussing the key influences that shaped initial attitudes and direction in these people through natural inclination, environmental inspirations and perceptions of science

Development of Readout Interconnections for the Si-W Calorimeter of SiD

The SiD collaboration is developing a Si-W sampling electromagnetic calorimeter, with anticipated application for the International Linear Collider. Assembling the modules for such a detector will involve special bonding technologies for the interconnections, especially for attaching a silicon detector wafer to a flex cable readout bus. We review the interconnect technologies involved, including oxidation removal processes, pad surface preparation, solder ball selection and placement, and bond quality assurance. Our results show that solder ball bonding is a promising technique for the Si-W ECAL, and unresolved issues are being addressed.Comment: 8 pages + title, 6 figure