Calculated performance, stability and maneuverability of high-speed tilting-prop-rotor aircraft

The feasibility of operating tilting-prop-rotor aircraft at high speeds is examined by calculating the performance, stability, and maneuverability of representative configurations. The rotor performance is examined in high-speed cruise and in hover. The whirl-flutter stability of the coupled-wing and rotor motion is calculated in the cruise mode. Maneuverability is examined in terms of the rotor-thrust limit during turns in helicopter configuration. Rotor airfoils, rotor-hub configuration, wing airfoil, and airframe structural weights representing demonstrated advance technology are discussed. Key rotor and airframe parameters are optimized for high-speed performance and stability. The basic aircraft-design parameters are optimized for minimum gross weight. To provide a focus for the calculations, two high-speed tilt-rotor aircraft are considered: a 46-passenger, civil transport and an air-combat/escort fighter, both with design speeds of about 400 knots. It is concluded that such high-speed tilt-rotor aircraft are quite practical

Widening participation in technology design: A review of the involvement of children with special educational needs and disabilities

This article presents a review of the design methods and techniques that have been used to involve children with special educational needs and/or disabilities (SEND) in the technology design process. Situating the work within the established child–computer interaction research sub-field of participatory design, we examine the progress that has been made in relation to the participation of this specific child population. An extensive review of the literature in this area has been undertaken and we describe the different roles, responsibilities and activities that have been undertaken by both the child and adult participants within previous technology design projects. We also highlight the different types of outcome from this previous work involving children with SEND, exploring the impact the children’s participation has had on both the resulting technology as well as the impact on the child participants themselves. Finally we conclude this review with a set of reporting recommendations for technology designers and researchers aiming to involve this population in future technology design projects

Widening participation in technology design: A review of the involvement of children with special educational needs and disabilities

This article presents a review of the design methods and techniques that have been used to involve children with special educational needs and/or disabilities (SEND) in the technology design process. Situating the work within the established child–computer interaction research sub-field of participatory design, we examine the progress that has been made in relation to the participation of this specific child population. An extensive review of the literature in this area has been undertaken and we describe the different roles, responsibilities and activities that have been undertaken by both the child and adult participants within previous technology design projects. We also highlight the different types of outcome from this previous work involving children with SEND, exploring the impact the children’s participation has had on both the resulting technology as well as the impact on the child participants themselves. Finally we conclude this review with a set of reporting recommendations for technology designers and researchers aiming to involve this population in future technology design projects

Diversity for design: a framework for involving neurodiverse children in the technology design process

The neurodiversity movement seeks to positively reframe certain neurological conditions, such as autism spectrum disorders (ASD) and dyslexia, by concentrating on their strengths. In recent years, neurodiverse children have increasingly been involved in the technology design process, but the design approaches adopted have focused mostly on overcoming difficulties of working with these children, leaving their strengths untapped. We present a new participatory design (PD) framework, Diversity for Design (D4D), which provides guidance for technology designers working with neurodiverse children in establishing PD methods that capitalize on children’s strengths and also support potential difficulties. We present two case studies of use of the D4D framework, involving children with ASD and dyslexia, showing how it informed the development and refinement of PD methods tailored to these populations. In addition, we show how to apply the D4D framework to other neurodiverse populations

Structured approaches to participatory design for children: can targeting the needs of children with autism provide benefits for a broader child population?

In the past technology products created to overcome accessibility and usability issues experienced by individuals with special needs have also resulted in greater usability for the wider population. Technology is increasingly being seen as a key component within the education of children with special needs and recently researchers have developed tailored approaches to involving this population in designing the technology. However, it is not known if these approaches could also benefit participation in a wider population. This paper investigates the potential benefits of using a new structured and supportive participatory design (PD) approach IDEAS, tailored to the specific needs of children with autism spectrum disorders (ASD), for mainstream schoolchildren. The development of this new approach is guided by the TEACCH program and additionally draws on ideas from existing PD approaches for children. A study has been undertaken to trial this approach with four design teams, two teams including children with ASD and two teams including mainstream schoolchildren. Their design task was to develop a mathematics game over a series of six design sessions following the IDEAS approach. The findings reveal that a structured and supportive PD approach can benefit both children with ASD and mainstream children. However, these benefits varied between and within different groups, with some children requiring the additional structure/support more than others. Future work intends to build upon these findings to develop a PD toolbox for a broader child population, enabling researchers to provide appropriate tailored support based on children’s individual characteristics and needs

Evaluation of Rotor Structural and Aerodynamic Loads using Measured Blade Properties

The structural properties of Higher harmonic Aeroacoustic Rotor Test (HART I) blades have been measured using the original set of blades tested in the wind tunnel in 1994. A comprehensive rotor dynamics analysis is performed to address the effect of the measured blade properties on airloads, blade motions, and structural loads of the rotor. The measurements include bending and torsion stiffness, geometric offsets, and mass and inertia properties of the blade. The measured properties are correlated against the estimated values obtained initially by the manufacturer of the blades. The previously estimated blade properties showed consistently higher stiffnesses, up to 30% for the flap bending in the blade inboard root section. The measured offset between the center of gravity and the elastic axis is larger by about 5% chord length, as compared with the estimated value. The comprehensive rotor dynamics analysis was carried out using the measured blade property set for HART I rotor with and without HHC (Higher Harmonic Control) pitch inputs. A significant improvement on blade motions and structural loads is obtained with the measured blade properties

Gender, Theology, and Political Views among Mainline Clergy

22 pages. Paper presented at the Annual Meetings of the Pacific Sociological Association, April 2005, Portland, OR.The dominant image of religion and politics in the US recently is that religion, especially Christianity, is strongly associated with conservative politics and antifeminist values with respect to women and sexuality. Many more liberal and progressive Christians have criticized this one - sided media focus, pointing out the strong traditional themes of support for peace, justice for the poor and marginalized groups, and love instead of judgment of neighbor. Even some evangelicals have decried the tactics and lack of concern for the poor of the Religious Right, and mainline leaders have strongly promoted progressive political change. While there are many studies that include religious affiliation, theological orthodoxy, and degree of commitment as predictors of political attitudes among lay members, there have surprisingly been fewer studies of the political and theological attitudes of mainline clergy on these issues. Moreover, since gender issues play a large role in conservative politics and religion, it seems important to study clergy attitudes in more mainline churches as well on these issues. Some studies find that women clergy in these denominations are more liberal on theological, social and political issues than men. If this is true, the increase of women in positions of church leadership is likely to influence congregational members in a more progressive direction. In this paper we present data from a survey of clergy in the state of Oregon, comparing mainline male and female clergy on a variety of theological and political opinions

Fossilized skin reveals coevolution with feathers and metabolism in feathered dinosaurs and early birds

Feathers are remarkable evolutionary innovations that are associated with complex adaptations of the skin in modern birds. Fossilised feathers in non-avian dinosaurs and basal birds provide insights into feather evolution, but how associated integumentary adaptations evolved is unclear. Here we report the discovery of fossil skin, preserved with remarkable nanoscale fidelity, in three non-avian maniraptoran dinosaurs and a basal bird from the Cretaceous Jehol biota (China). The skin comprises patches of desquamating epidermal corneocytes that preserve a cytoskeletal array of helically coiled α-keratin tonofibrils. This structure confirms that basal birds and non-avian dinosaurs shed small epidermal flakes as in modern mammals and birds, but structural differences imply that these Cretaceous taxa had lower body heat production than modern birds. Feathered epidermis acquired many, but not all, anatomically modern attributes close to the base of the Maniraptora by the Middle Jurassic

Moving from sect to church: Variations in views regarding sanctification among wesleyan/holiness clergy

23 pagesThis paper examines the extent to which clergy within three Wesleyan/Holiness denominations (The Church of God [Anderson, Indiana], The Church of the Nazarene, and The Evangelical Church of North America) adhere to traditional beliefs regarding sanctification. Results indicate that while there is significant support for traditional holiness views, a substantial number of clergy indicate doubts on some elements of the doctrine. Almost half of the variation in these views can be accounted for by the independent influence of denominational affiliation, church size, age, being a later generation pastor, and other theological beliefs. In addition, independent of denominational affiliation, age, education, and general political outlook, clergy with less traditional views regarding sanctification are significantly less likely to support cooperation with the Christian Holiness Partnership and less likely to express views that could be considered socially conservative. At the same time, denominational affiliation exerts a strong influence on the extent to which clergy adhere to the doctrines of sanctification and on views regarding ecumenism and moral, political, and social issues. We suggest that these results can help scholars understand the ways in which variations in individual attitudes contribute to the movement from sect to church and point to the importance of denominational culture and heritage in understanding variations in religious and political/social attitudes

Isotopic evidence for the diversity of late Quaternary loess in Nebraska: Glaciogenic and nonglaciogenic sources

Pb isotope compositions of detrital K-feldspars and U-Pb ages of detrital zircons are used as indicators for determining the sources of Peoria Loess deposited during the last glacial period (late Wisconsin, ca. 25–14 ka) in Nebraska and western Iowa. Our new data indicate that only loess adjacent to the Platte River has Pb isotopic characteristics suggesting derivation from this river. Most Peoria Loess in central Nebraska (up to 20 m thick) is non-glaciogenic, on the basis of Pb isotope ratios in K-feldspars and the presence of 34-Ma detrital zircons. These isotopic characteristics suggest derivation primarily from the Oligocene White River Group in southern South Dakota, western Nebraska, southeastern Wyoming, and northeastern Colorado. The occurrence of 10–25 Ma detrital zircons suggests additional minor contributions of silt from the Oligocene-Miocene Arikaree Group and Miocene Ogallala Group