3,010 research outputs found
Investigation of slosh anomaly in Apollo lunar module propellant gage
Analysis of propellant sloshing in lunar module during Apollo 14 flight and resultant erroneous indication of low level of propellan
In Delaware the Millennium Has Begun : 19th-Century Farmstead Archaeology and the Methodist Discipline
By the beginning of the 19th century the Methodist movement had gained so many converts in the state of Delaware that Francis Asbury had likened it to the coming of the New Millenium. The growth of Methodism I the state was a powerful social force in rural 19th-century Delaware. Guidlines and behavioral rules were published annually in a series entitled the Discipline. The Methodist Discipline provides a contextual backdrop for understanding 19th-century farming families. This case study examines the Methodist farmer George W. Buchanan and his family who in the mid-part of the century established a farmstead in southern New Castle County. The Buchanan farm prospered until a dispute over a fence resulted in the death of a neighbor at Buchanan\u27s hands. In the six years following the murder trial, the Buchanan family suffered a string of deaths that took every member of the household over the age of 10. The once successful Buchanan farm was broken up, leaving Buchanan\u27s surviving sons a small plot of land only a tenth the size of their father\u27s farm. This paper attempts to connect the archaeological and historical information with contextual bridges in order to piece together the circumstances of the failure of the Buchanan farm. The story behind the Buchanan farmstead has demostrated that social factors, rather than agricultural practice, determined the origin and eventual end of this farm. This interpretation carries with it implications for future research into the people who operated 19th-century farms
Application of advanced technologies to small, short-haul transport aircraft (STAT)
The benefits of selected advanced technologies for 19 and 30 passenger, short-haul aircraft were identified. Advanced technologies were investigated in four areas: aerodynamics, propulsion, structures, and ride quality. Configuration sensitivity studies were conducted to show design tradeoffs associated with passenger capacity, cabin comfort level, and design field length
For Us -- Pasture Renovation Paid Off
Renovating a permanent pasture may double its carrying capacity. And this cost probably will be less than you think
System for measuring passenger reaction to transportation-vehicle vibration
Equipment is capable of measuring frequencies from 0 to 50 Hz and is portable, light, inexpensive, and easily adaptable to field operations. System could be used in situations where it is necessary to record simultaneously subject response to other types of physical measurement or stimuli, such as temperature, noise, or pressure
Ride-hailing and (dis)Advantage: Perspectives from Users and Non-users
The introduction of ride-hailing in cities of Latin America and the Caribbean (LAC) remains a relatively new topic in regional research and a contentious issue in local policy and practice. Evidence regarding users and how do they differ from non-users is scarce, and there is little documented evidence about how user preferences and perceptions may influence the uptake of ride-hailing. This paper uses primary data from a survey collected from users and non-users of ride-hailing in Bogotá during 2019 to develop a Latent Class Analysis Model (LCA) to identify clusters of users and non-users of ride-hailing. The paper builds on results from the LCA to reflect on conditions of advantage and disadvantage that may make ride-hailing attractive and beneficial for particular social groups. The paper identifies four unique clusters: Carless middle-income ride-hailing users, Disadvantaged non-users, Young middle-class non-users, and Advantaged ride-hailing users. The research uses data on such perceptions to draw insights that may inform commercial and policy decisions. Findings suggest that issues such as the perception of legality in ride-hailing and aversion to crime play a significant role in the choice of such a mode in the context of Bogotá, particularly among socially and transport advantaged users
Renovation Can Double Pasture Production
Renovation is often recommended as the best method for improving pastures. Results of long-time studies are now available where renovated pastures have been compared with unimproved pastures in southern Iowa
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