Rotary engine performance limits predicted by a zero-dimensional model

A parametric study was performed to determine the performance limits of a rotary combustion engine. This study shows how well increasing the combustion rate, insulating, and turbocharging increase brake power and decrease fuel consumption. Several generalizations can be made from the findings. First, it was shown that the fastest combustion rate is not necessarily the best combustion rate. Second, several engine insulation schemes were employed for a turbocharged engine. Performance improved only for a highly insulated engine. Finally, the variability of turbocompounding and the influence of exhaust port shape were calculated. Rotary engines performance was predicted by an improved zero-dimensional computer model based on a model developed at the Massachusetts Institute of Technology in the 1980's. Independent variables in the study include turbocharging, manifold pressures, wall thermal properties, leakage area, and exhaust port geometry. Additions to the computer programs since its results were last published include turbocharging, manifold modeling, and improved friction power loss calculation. The baseline engine for this study is a single rotor 650 cc direct-injection stratified-charge engine with aluminum housings and a stainless steel rotor. Engine maps are provided for the baseline and turbocharged versions of the engine

The Lodge Case and the Misapplication of the Per Se Cartel Provisions of the Commerce Act 1986

An arrangement to fix, control or maintain prices is the classic competition law per se offence, and is deemed to substantially lessen competition under s 30 of the Commerce Act 1986. However, it is currently unclear when arrangements that do not explicitly concern price fall within the ambit of s 30. This article examines the recent Court of Appeal decision in Commerce Commission v Lodge Real Estate Ltd which found that the defendants were liable under the per se offence provisions. It contends that the Court of Appeal took the overseas case law out of context, misunderstood key factual findings made by the High Court at first instance and overlooked important legal and policy considerations. As a result it is argued that Lodge sets an unfortunate precedent that should be overruled or strictly confined to its own facts

Invoice from Edward Willis to Ogden Goelet

https://digitalcommons.salve.edu/goelet-personal-expenses/1082/thumbnail.jp

Resources and Relationships: Food Insecurity and Social Capital Among Middle School Students

This study examines the relationship between food insecurity and Social capital among 5th-7th graders attending an intermediate school in Northwest Arkansas where nearly 70 percent of students participate in the free or reduced lunch program. The central research questions are: Does Social capital have a direct impact on children\u27s food insecurity? And, does Social capital mediate the influence of negative circumstances on children\u27s food insecurity? This study finds that Social capital does have a significant association with food insecurity, even when controlling for multiple demographic and circumstantial factors. However, there appears to be no mediation of circumstance by Social capital. Additionally, we find that the quality of relationships among peers, rather than the quantity of close friends, plays a primary role in children\u27s food insecurity. Together, these findings tell a story about the importance of relationships among middle-school children and how these connections may function to provide a shield from insecurity. More broadly, however, this study informs the larger question of how hunger exists in a nation as rich as the United States by addressing food insecurity as a Social phenomenon rather than simply an economic, technological, or biological one

Engineering study of the rotary-vee engine concept

The applicable thermodynamic cycle and performance considerations when the rotary-vee mechanism is used as an internal combustion (I.C.) heat engine are reviewed. Included is a simplified kinematic analysis and studies of the effects of design parameters on the critical pressures, torques and parasitic losses. A discussion of the principal findings is presented

Predictive aging of polymers

A method of predicting aging of polymers operates by heating a polymer in the outdoors to an elevated temperature until a change of property is induced. The test is conducted at a plurality of temperatures to establish a linear Arrhenius plot which is extrapolated to predict the induction period for failure of the polymer at ambient temperature. An Outdoor Photo Thermal Aging Reactor (OPTAR) is also described including a heatable platen for receiving a sheet of polymer, means to heat the platen and switching means such as a photoelectric switch for turning off the heater during dark periods

The aboriginal utilization of the tall cacti in the American Southwest

Bibliography: p. 43-48https://digitalrepository.unm.edu/unm_bulletin/1027/thumbnail.jp

[Introduction to] The Edge of the South: Life in Nineteenth-Century Virginia

The chapters in this volume explore diverse scenes of nineteenth-century Virginia: the big house and the slave quarters, small farms and battlefields, freed slaves in the country and freed slaves in the city, dark coal mines and brightly illuminated caverns, raucous political rallies and genteel meetings of the United Daughters of the Confederacy. Each essay offers a new perspective on a past which refuses to fit familiar ways of thinking about the nation and the South.https://scholarship.richmond.edu/bookshelf/1251/thumbnail.jp

The utilization of yucca, sotol, and beargrass by the aborigines in the American Southwest

Bibliography: p. 66-74https://digitalrepository.unm.edu/unm_bulletin/1032/thumbnail.jp

The utilization of mesquite and screwbean by the aborigines in the American Southwest

Bibliography: p. 48-55https://digitalrepository.unm.edu/unm_bulletin/1028/thumbnail.jp