2,804 research outputs found
THE PROPENSITY TO EXCESS CAPACITY IN THE LETTUCE SUBSECTOR
Crop Production/Industries, Demand and Price Analysis,
A LINKED ANNUAL AND MONTHLY MODEL FOR FORECASTING ALFALFA HAY PRICES
This article develops a model to forecast monthly alfalfa hay prices before the first harvest. This is done by linking an annual model, which forecasts the initial May price, with a system of monthly equations that track the monthly seasonal price pattern, given the forecasted May price.Crop Production/Industries, Demand and Price Analysis,
Erosion in radial inflow turbines. Volume 5: Computer programs for tracing particle trajectories
Computer programs used to study the trajectories of particles in the radial inflow turbines are presented. The general technique of each program is described. A set of subroutines developed during the study are described. Descriptions, listings, and typical examples of each of the main programs are included
Erosion in radial inflow turbines. Volume 3: Trajectories of erosive particles in radial inflow turbines
The theoretical trajectories that erosive particles follow in the gas flow fields of a typical radial inflow turbine were investigated. A discussion of the theoretical trajectories that the particles follow in the scroll, in the nozzles, in the vortex between the nozzles and the rotor, and in the rotor passages is included. The results are presented in terms of the characteristic length, a similarity parameter which relates the particles that follow the same trajectory in equivalent flow fields. For Vol, 1, see N74-19395
Erosion in radial inflow turbines. Volume 2: Balance of centrifugal and radial drag forces on erosive particles
The particle motion in two-dimensional free and forced inward flowing vortices is considered. A particle in such a flow field experiences a balance between the aerodynamic drag forces that tend to drive erosive particles toward the axis, and centrifugal forces that prevent these particles from traveling toward the axis. Results predict that certain sizes of particles will achieve a stable orbit about the turbine axis in the inward flowing free vortex. In this condition, the radial drag force is equal to the centrifugal force. The sizes of particles that will achieve a stable orbit is shown to be related to the gas flow velocity diagram at a particular radius. A second analysis yields a description of particle sizes that will experience a centrifugal force that is greater than the radial component of the aerodynamic drag force for a more general type of particle motion
Erosion in radial inflow turbines. Volume 4: Erosion rates on internal surfaces
An analytic study of the rate at which material is removed by ingested dust impinging on the internal surfaces of a typical radial inflow turbine is presented. Results show that there are several regions which experience very severe erosion loss, and other regions that experience moderate levels of erosion loss: (1) the greatest amount of material loss occurs on the trailing edges of the nozzle blades where very high velocity, moderate angle impacts occur. The tip regions of ductile materials are also subjected to serious levels of erosion loss; (2) moderate amounts of erosion occur near the end of the scroll and on a few of the nozzle blades near this location. Results are presented in the form of surface contours that exist on the scroll and blade surfaces after continuous particulate ingestion with time
The distribution of the ferns and fern allies found in Indiana
The list of Pteridophyta found in Indiana was compiled from the Flora of Indiana, by Charles C. Deam and the yearly supplementary distribution records prepared by the State Flora Committee of the Indiana Academy of Science. The publications give the state distribution by counties. For data concerning the national distribution and various state floras, manuals of wider scope and periodical literature were used. The national distribution of the Indiana ferns and fern allies was mapped as accurately as possible, and from these maps the determination of intraneous and extraneous species was made
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Putting Smell in Its Place: The Categorization of Odor Preservation Projects
Preservationists, starting in the late twentieth century, have put the idea to practice that the smell of an object, place, event, or person can be worthy of preservation and considered culturally significant. This is a recent shift in a discipline that was previously focused on physical objects such as buildings, monuments, and art as the only entities that were considered to be worthy of preservation. Preservation theory therefore developed theories of authenticity that do not capture or are unable to judge smell. This thesis will fill an important gap in the heritage discourse by providing a critical framework for judging the level of authenticity in olfactory preservation projects. I examined key examples of scent preservation including Colonial Williamsburg (1926), the Dennis Severs House (1999), the Japanese Ministry for the Environment’s 100 Most Fragrant Landscapes List (2001), and my own Morgan Library Odor Recreation (2017). I provide an analytical framework for judging the level of authenticity of smell preservation projects, consisting of eight categories including sourcing, significance, fabrication, location, intention, duration, evidence, and aesthetics. While each of the aforementioned case studies utilize odors in some manner, each of them does so very differently with a different intent. In every instance where case studies have been analyzed and historical records have been created no one has attempted to categorize them. The intent of this thesis is to arrive at such a framework through the analysis of key olfactory preservation projects by providing a framework for judgement. I hope to provide a theoretical foundation for future practices in management, design, and interpretation of odor preservation projects
The Science of Communication: A Bayesian Account of Communication Strategy Selection
This paper will detail how Bayesian epistemology, traditionally a tool of philosophers of science, can be used to select a method of communication that is most likely to produce a desired communication goal from a targeted subject. Using the frame of Bayes’ Theorem in the form of Posterior Probability Ratios, it will show how a communicator, focusing on agency and awareness, can use said frame to deliberately and purposefully select an evidentially favored communication strategy, intended to elicit a certain response from the respondent. By translating the epistemic version of Bayes’ Theorem into a communication setting, this strategy presents an alternative method to use when navigating typical social interactions that would be useful for those who have trouble grasping traditional communication dynamics. Furthermore, the paper explains how this strategy is easy and natural to use because the human brain has evolved in such a way that it remembers and weights relevant occurrences for any given situation, which can then act as data for the comparative ratios
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