A computer program for the calculation of laminar and turbulent boundary layer flows

The results are presented of a study to produce a computer program to calculate laminar and turbulent boundary layer flows. The program is capable of calculating the following types of flow: (1) incompressible or compressible, (2) two dimensional or axisymmetric, and (3) flows with significant transverse curvature. Also, the program can handle a large variety of boundary conditions, such as blowing or suction, arbitrary temperature distributions and arbitrary wall heat fluxes. The program has been specialized to the calculation of equilibrium air flows and all of the thermodynamic and transport properties used are for air. For the turbulent transport properties, the eddy viscosity approach has been used. Although the eddy viscosity models are semi-empirical, the model employed in the program has corrections for pressure gradients, suction and blowing and compressibility. The basic method of approach is to put the equations of motion into a finite difference form and then solve them by use of a digital computer. The program is written in FORTRAN 4 and requires small amounts of computer time on most scientific machines. For example, most laminar flows can be calculated in less than one minute of machine time, while turbulent flows usually require three or four minutes

Three methods of presenting flight vector information in a head-up display during simulated STOL approaches

A simulator study was conducted to determine the usefulness of adding flight path vector symbology to a head-up display designed to improve glide-slope tracking performance during steep 7.5 deg visual approaches in STOL aircraft. All displays included a fixed attitude symbol, a pitch- and roll-stabilized horizon bar, and a glide-slope reference bar parallel to and 7.5 deg below the horizon bar. The displays differed with respect to the flight-path marker (FPM) symbol: display 1 had no FPM symbol; display 2 had an air-referenced FPM, and display 3 had a ground-referenced FPM. No differences between displays 1 and 2 were found on any of the performance measures. Display 3 was found to decrease height error in the early part of the approach and to reduce descent rate variation over the entire approach. Two measures of workload did not indicate any differences between the displays

Higher Education Collaboratives for Community Engagement and Improvement

Our society is in a period of dramatic change with the transition from an industrial-based to a knowledge-based economy, as well as technological advances, fiscal challenges of higher education, and cultural shifts in society as a whole. Increasing collaborations between communities and universities in order to influence the public good becomes paramount during this time of dramatic change. As frustratingly slow as the movement to strengthen the relationship between higher education and society sometimes seems to be, few social institutions are better situated than colleges and universities to stimulate significant community improvement. Individually and collectively, institutions of higher education possess considerable resources—human, fiscal, organizational, and intellectual— which are critical to addressing significant social issues. Additionally, these institutions are physically rooted in their communities. Therefore, investing in the betterment of their immediate environments is good for both the community and the institution. However, it is recognized that higher education institutions often fall short of making a real impact in their home communities. Therefore, a conference was convened to examine the current and evolving role of higher education institutions, particularly those operating within the context of coalitions, consortia and state systems, to catalyze change on issues affecting communities and society as a whole. Specifically, the focus of the conference was to develop and strengthen an understanding of how higher education might work more effectively with communities and we believe that consortia or collaboratives of higher education institutions, along with community partners, can learn from one another. Cooperation between efforts is important. The papers offered in this monograph are the result of the Wingspread Conference on Higher Education Collaboratives for Community Engagement and Improvement, conducted on October 27-29, 2004, in Racine, Wisconsin. The conference, the second of a three-part series, was sponsored by the National Forum on Higher Education for the Public Good at the University of Michigan School of Education, the Johnson Foundation, Atlantic Philanthropies, and the W.K. Kellogg Foundation. The first conference in the series held in October 2003 and titled Public Understanding, Public Support and Public Policy focused on higher education’s role in society and the concluding conference will be held in the fall of 2005

The development and evaluation of exercises for group response to word meaning for increasing the speed of word recognition in grade I

Thesis (Ed.M.)--Boston Universit

The social security rights of older international migrants in the European Union

Europe is now home to a significant and diverse population of older international migrants. Social and demographic changes have forced the issue of social security in old age onto the European social policy agenda in the last decade. In spite of an increased interest in the financial well-being of older people, many retired international migrants who are legally resident in the European Union face structured disadvantages. Four linked factors are of particular importance in shaping the pension rights and levels of financial provision available to individual older migrants: migration history, socio-legal status, past relationship to the paid labour market, and location within a particular EU Member State. Building on a typology of older migrants, the paper outlines the ways in which policy at both the European Union and Member State levels serves to diminish rather than enhance the social security rights of certain older international migrants

Loop space homology associated with the mod 2 Dickson invariants

Peer reviewedPublisher PD

The role of interplanetary scattering in western hemisphere large solar energetic particle events

Using high-sensitivity instruments on the ACE spacecraft, we have examined the intensities of O and Fe in 14 large solar energetic particle events whose parent activity was in the solar western hemisphere. Sampling the intensities at low (~273 keV nucleon to the -1) and high (~12 MeV nucleon to the -1) energies, we find that at the same kinetic energy per nucleon, the Fe/O ratio decreases with time, as has been reported previously. This behavior is seen in more than 70% of the cases during the rise to maximum intensity and continues in most cases into the decay phase. We find that for most events if we compare the Fe intensity with the O intensity at a higher kinetic energy per nucleon, the two time-intensity profiles are strikingly similar. Examining alternate scenarios that could produce this behavior, we conclude that for events showing this behavior the most likely explanation is that the Fe and O share similar injection profiles near the Sun, and that scattering in the interplanetary medium dominates the profiles observed at 1 AU