An aerodynamic comparison of blown and mechanical high lift airfoils

Short takeoff and landing (STOL) performance utilizing a circulation control airfoil was successfully demonstrated on the A-6 CCW (circulation control wing). Controlled flight at speeds as slow as 67 knots was demonstrated. Takeoff ground run and liftoff speed reductions in excess of 40 and 20 percent respectively were achieved. Landing ground roll and approach speeds were similarly reduced. The technology demonstrated was intended to be useable on modern high performance aircraft. STOL performance would be achieved through the combination of a 2-D vectored nozzle and a circulation control type of high lift system. The primary objective of this demonstration was to attain A-6 CCW magnitude reductions in takeoff and landing flight speed and ground distance requirements using practical bleed flow rates from a modern turbofan engine for the blown flap system. Also, cruise performance could not be reduced by the wing high lift system. The A-6 was again selected as the optimum demonstration vehicle. The procedure and findings of the study to select the optimum high lift wing design are documented. Some findings of a supercritical airfoil and a comparison of 2-D and 3-D results are also described

The Atomic and Molecular Content of Disks Around Very Low-mass Stars and Brown Dwarfs

There is growing observational evidence that disk evolution is stellar-mass dependent. Here, we show that these dependencies extend to the atomic and molecular content of disk atmospheres. We analyze a unique dataset of high-resolution Spitzer/IRS spectra from 8 very low-mass star and brown dwarf disks. We report the first detections of Ne+, H2, CO2, and tentative detections of H2O toward these faint and low-mass disks. Two of our [NeII] 12.81 micron emission lines likely trace the hot (>5,000 K) disk surface irradiated by X-ray photons from the central stellar/sub-stellar object. The H2 S(2) and S(1) fluxes are consistent with arising below the fully or partially ionized surface traced by the [NeII] emission, in gas at about 600 K. We confirm the higher C2H2/HCN flux and column density ratio in brown dwarf disks previously noted from low-resolution IRS spectra. Our high-resolution spectra also show that the HCN/H2O fluxes of brown dwarf disks are on average higher than those of T Tauri disks. Our LTE modeling hints that this difference extends to column density ratios if H2O lines trace warm > 600 K disk gas. These trends suggest that the inner regions of brown dwarf disks have a lower O/C ratio than those of T Tauri disks which may result from a more efficient formation of non-migrating icy planetesimals. A O/C=1, as inferred from our analysis, would have profound implications on the bulk composition of rocky planets that can form around very low-mass stars and brown dwarfs.Comment: Accepted to Ap

An investigation of the mirroring of supply chain configuration modularity, and product modularity in contemporary supply chains

The introduction of new to market products is a challenge, in high technology markets, where speed and product variation are key considerations. High technology companies require the ability to simultaneously combine operational excellence, customer intimacy and product leadership. A lack of coordination between new product development (NPD), product planning and supply chain configuration (SCC) is a recognised cause of many early-life product failures. This research has one objective: to increase our understanding of the role of modularity in linking SCC and NPD decisions. The research incorporates general systems theory (GST) and knowledge-based theory (KBT), in mirroring product modularity (PM) and SCC modularity (SCCM) within contemporary supply networks. A systematic literature review (SLR) advocates the use of modular design, in linking these concepts and boosting the rate of innovation. The literature indicates that product architecture (PA) and SCC tend to be mirrored in modularity levels, post product launch, and this mirroring is desirable. The literature identified a gap in how SCCM is conceptualised, and how this mirroring manifests itself. These gaps are addressed in the empirical research conducted in project two, where the SCCM construct was developed and used to assess the manifestation and benefits of PM and SCCM mirroring across ten products (UoA) in five case companies across four industry sectors. Mirroring is evident, in six of the UoA, the remaining four UoA exhibit a medium level of mirroring, post product launch. The contribution to theory is a conceptualisation of SCCM where supply chain tiering is a main indicator. Propensity for modules to decouple; early supplier involvement, and a mirrored product and SCC life cycle perspective are the three causal linkages which enable mirroring of PM and SCCM post product launch. The SLR identified the use of co-development (CD), feedback (FC) and feedforward anticipatory control (FAC) at concept design to increase the mirroring of PM and SCCM, post product launch. In project three hypotheses were tested which advocate the use of these mechanisms, and the associated underlying mechanisms were investigated. The findings indicate use of CD and FAC, but a lack of FC, and mirroring support for platform design. The contribution to practice is an intervention framework applied at the concept stage that improves the coordination between NPD, SCC and product planning for new to market products

Disaster Movies and the Perception of Human Behavior Myths in Disasters

This study explored if disaster movies change the perceptions viewers hold regarding human behavior in disasters, and if so, whether these effects are observable six weeks after watching the disaster movie. The study documented the anticipation of disaster myths in human behavior for 121 respondents, providing data that can better inform the discussion of disaster myths and realities. The study found changes to anticipation of disaster myths in human behavior and realities across multiple categories, with statistically significant results related to the factor of Looting Myth. Limitations for this study include a small sample size, and the external influence of current events on research participants

'Letting them eat cake': Narrative templates in current affairs/news journalism

This article explores the role of narrative templates in a core domain of public communication, describing a series of narrative structural patterns that underlie the scripting of news and current affairs ‘reports’. From an initial account of the nature of narrative templates and their relation to audience expectations and interpretative regimens, a number of  specific story-styles that are employed recurringly in news programmes are described, examining their use and impact for capturing and maintaining audience attention. The process of telling the audience the stories it wants to hear is critiqued in terms of the capacity to subvert the quality of public communication and in terms of enduring concerns within discursive theory

Alien Registration- Carr, John (Houlton, Aroostook County)

https://digitalmaine.com/alien_docs/35893/thumbnail.jp