Options for reshaping the railway

In many countries the mismatch between what the railways offer and what the customers want has caused significant economic inefficiency and severe financial strains for the railways and their government owners. The concept of the railway as a monolithic entity is so strong in many countries as to be a roadblock against reshaping the railway. The authors explore four options which can be used to reshape the railways. First is the lines of business option which improves accountability and responsiveness to markets. The second is the competitive access option which introduces intramodal competition in selected markets, while maintaining unitary control over most railway operations. The third is the"wholesaler"option which would accomplish an excellent marketing job, but the actual operation would remain in monolithic hands. Finally there is the"toll rail enterprise"option which comes closest to reflecting a theoretical model of marketing effectiveness, however it would generate potential operating conflicts and higher transaction costs. The authors show that one generalization holds true in all circumstances: a monolithic railway does not function well in a market economy in competition with privately owned, properly regulated competitors - especially trucking. The authors point out that solutions will vary, but the universal objective as an economy becomes more market driven is to make the railway more market sensitive.Railways Transport,Roads&Highways,Environmental Economics&Policies,Banks&Banking Reform,ICT Policy and Strategies

Transfer molding of PMR-15 polyimide resin

Transfer molding is an economically viable method of producing small shapes of PMR-15 polyimide. It is shown that with regard to flexural, compressive, and tribological properties transfer-molded PMR-15 polyimide is essentially equivalent to PMR-15 polyimide produced by the more common method of compression molding. Minor variations in anisotropy are predictable effects of molding design and secondary finishing operations

Finite element modeling of electromagnetic fields and waves using NASTRAN

The various formulations of Maxwell's equations are reviewed with emphasis on those formulations which most readily form analogies with Navier's equations. Analogies involving scalar and vector potentials and electric and magnetic field components are presented. Formulations allowing for media with dielectric and conducting properties are emphasized. It is demonstrated that many problems in electromagnetism can be solved using the NASTRAN finite element code. Several fundamental problems involving time harmonic solutions of Maxwell's equations with known analytic solutions are solved using NASTRAN to demonstrate convergence and mesh requirements. Mesh requirements are studied as a function of frequency, conductivity, and dielectric properties. Applications in both low frequency and high frequency are highlighted. The low frequency problems demonstrate the ability to solve problems involving media inhomogeneity and unbounded domains. The high frequency applications demonstrate the ability to handle problems with large boundary to wavelength ratios

An investigation of small-scale motions and the forecasting of wind profiles over short periods of time at Cape Kennedy, Florida

Small scale motions and numerical wind profiles forecasting for short periods at Cape Kenned

Ecologic Relationships Between Bacteria and Algae in Mass Culture

Ecological relationships between bacteria and algae in mass cultur

Comet Shoemaker‐Levy 9: No effect on the Io plasma torus

Observations of the Io plasma torus made before, during, and after the impact of Comet Shoemaker‐Levy 9 with Jupiter reveal no comet‐induced changes. Three weeks of high spectral‐resolution ground‐based visible spectroscopy show no changes larger than typical day‐to‐day variations in the torus densities, ion temperatures, or rotation velocities. Comparison with six months of identically obtained data from 1991 and 1992 also shows no differences

‘If I climb a wall of ten meters’: capoeira, parkour and the politics of public space among (post)migrant youth in Turin, Italy

Rather than being seen as citizens, the children of immigrants are portrayed as a population to be controlled and contained across Europe. In Italy today, debates about cultural ‘authenticity’ and renewed nationalism accompany waves of moral panic that depict a country under siege by illegal and unwanted immigrants. Specifically in cities, immigrants and their children are imagined and portrayed as alien and out of place. Drawing on fourteen months of ethnographic research in Turin, Italy, with children of immigrants aged between 16 and 21, De Martini Ugolotti and Moyer illustrate how these youth make use of their bodies through capoeira and parkour practices to contest and reappropriate public spaces, thereby challenging dominant visions about what constitutes the public, how it should be used and by whom. They analyse the ‘body in place’ to understand how the children of immigrants navigate unequal spatial relations and challenge dominant regimes of representation, while also attempting to improve their life conditions and reach their personal goals

Monuments to water and air systems

The entire thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file; a non-technical public abstract appears in the public.pdf file.Title from PDF of title page (University of Missouri--Columbia, viewed on November 19, 2009).Thesis advisor: Bede Clarke.Vita.M.F.A. University of Missouri--Columbia 2009.Water and air are essential to life. Clean water and air, as well as the systems that deliver them, are undeniable necessities and conveniences within our lives. Conceptually, my work focuses on water and air distribution systems (both real and imaginary) and the ingenuity and dedication needed to design and maintain them. By combining seemingly contradictory and disparate materials, such as fired ceramics, air filters, found industrial objects and steel pipes, I present a whimsical and often simplified representation of these systems. Using the visual language that is created through this process, I encourage viewers to embrace the glory of mechanization and contemplate the expressive human qualities of efficiency, agency and ingenuity that are captured in mechanical systems.Includes bibliographical references

A comparative analysis of rawinsonde and NIMBUS 6 and TIROS N satellite profile data

Comparisons are made between rawinsonde and satellite profiles in seven areas for a wide range of surface and weather conditions. Variables considered include temperature, dewpoint temperature, thickness, precipitable water, lapse rate of temperature, stability, geopotential height, mixing ratio, wind direction, wind speed, and kinematic parameters, including vorticity and the advection of vorticity and temperature. In addition, comparisons are made in the form of cross sections and synoptic fields for selected variables. Sounding data from the NIMBUS 6 and TIROS N satellites were used. Geostrophic wind computed from smoothed geopotential heights provided large scale flow patterns that agreed well with the rawinsonde wind fields. Surface wind patterns as well as magnitudes computed by use of the log law to extrapolate wind to a height of 10 m agreed with observations. Results of this study demonstrate rather conclusively that satellite profile data can be used to determine characteristics of large scale systems but that small scale features, such as frontal zones, cannot yet be resolved