5,403 research outputs found
Results of a 0.03- scale aerodynamic characteristics investigation of Boeing 747 carrier (model no. AX 1319 I-1) mated with a space shuttle orbiter (model 45-0) conducted in the Boeing transonic wind tunnel (CA5), volume 1
The performance, stability, and control characteristics of various carrier aircraft configurations are presented. Aerodynamic characteristics of the carrier mated with the Orbiter, carrier alone, and Orbiter alone were investigated. Carrier support system tare and interference effects were determined. Six-component force and moment data were recorded for the carrier and Orbiter. Buffet onset characteristics of the carrier vertical tail and horizontal tail were recorded. Angles of attack from -3 deg through 26 deg and angles of slideslip between +12 deg and -12 deg were investigated at Mach numbers from 0.15 through 0.70. Photographs are included
COOPERATION BETWEEN THE INTERSTATE COMMERCE COMMISSION AND THE STATE COMMISSIONS IN RAILROAD REGULATION
Cooperation between the Interstate Commerce Commission and the state commissions in railroad regulation has been developed to increase the effectiveness of public control under our dual regulatory system. The division of power between federal and state governments, based upon the traditional distinction between interstate and intrastate commerce, has led to a multitude of diverse and conflicting statutes and administrative orders applicable to the same set of transportation agencies. In large measure the problem of dual control has been solved by giving to the federal government a virtually complete occupancy of the fields of rate, finance, and service regulation of interstate railways. This recognition of the predominance of the national interest in the transportation system has resulted in a large diminution of the powers formerly exercised by the individual states
Sources of pesticide losses to surface waters and groundwater at field and landscape scales
Pesticide residues in groundwater and surface waters may harm aquatic ecosystems and result in a deterioration of drinking water quality. EU legislation and policy emphasize risk management and risk reduction for pesticides to ensure long-term, sustainable use of water across Europe. Different tools applicable at scales ranging from farm to national and EU scales are required to meet the needs of the various managers engaged with the task of protecting water resources. The use of computer-based pesticide fate and transport models at such large scales is challenging since models are scale-specific and generally developed for the soil pedon or plot scale. Modelling at larger scales is further complicated by the spatial and temporal variability of agro-environmental conditions and the uncertainty in predictions. The objective of this thesis was to identify the soil processes that dominate diffuse pesticide losses at field and landscape scales and to develop methods that can help identify 'high risk' areas for leaching. The underlying idea was that pesticide pollution of groundwater and surface waters can be mitigated if pesticide application on such areas is reduced. Macropore flow increases the risk of pesticide leaching and was identified as the most important process responsible for spatial variation of diffuse pesticide losses from a 30 ha field and a 9 km² catchment in the south of Sweden. Point-sources caused by careless handling of pesticides when filling or cleaning spraying equipment were also a significant source of contamination at the landscape scale. The research presented in this thesis suggests that the strength of macropore flow due to earthworm burrows and soil aggregation can be predicted from widely available soil survey information such as texture, management practices etc. Thus, a simple classification of soils according to their susceptibility to macropore flow may facilitate the use of process-based models at the landscape scale. Predictions of a meta-model of the MACRO model suggested that, at the field scale, fine-textured soils are high-risk areas for pesticide leaching. Uncertainty in pesticide degradation and sorption did not significantly affect predictions of the spatial extent of these high-risk areas. Thus, site-specific pesticide application seems to be a promising method for mitigating groundwater contamination at this scale
Simulation of electron paramagnetic resonance spectra of spin-labeled molecules from replica-exchange molecular dynamics
Picture the Music: Performing Arts Library Planning with Photo Elicitation
Photo elicitation, a form of ethnographic journaling, provided insights into university music and dance student needs in library and campus spaces and services. In this case study, subjects took a photo for each of twenty prompts related to their daily lives as students and performing artists, then discussed their own photos in a one-hour individual interview. Researchers qualitatively analyzed the gathered data. This article reports findings related to: discovering and obtaining music and dance works, study spaces and sound levels, forces of habit and the implications for student library use, and library-related findings regarding practice rooms and classrooms
UMKC Conservatory Students and Their Work: Research Findings
The initiative for UMKC’s Downtown Campus for the Arts presents a unique opportunity for radical change in Conservatory and Conservatory library spaces and services. To inform planning of the new campus and its library, a UMKC research team harnessed ethnographic methods to research UMKC Conservatory student needs. Ethnographic methods facilitate holistic examination of numerous aspects of the studied population by using open-ended tools to gather qualitative data
- …