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- Acoustic Doppler profilers (2)
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Articles 1 - 16 of 16
Full-Text Articles in Social and Behavioral Sciences
Velocity Contour Weighting Method. Ii: Evaluation In Trapezoidal Channels And Roughness Sensitivity, Daniel Howes, Brett F. Sanders
Velocity Contour Weighting Method. Ii: Evaluation In Trapezoidal Channels And Roughness Sensitivity, Daniel Howes, Brett F. Sanders
BioResource and Agricultural Engineering
The Velocity Contour Weighting Method (VCWM) was developed in Part I to accurately estimate the cross-sectional average velocity of a prismatic channel flow using acoustic Doppler velocity meter (ADVM) measurements of centerline velocity. Here, the VCWM is validated by its successful application to 25 different concrete-lined trapezoidal channels used for irrigation water delivery. At each site, the cross-sectional distribution of velocity is measured by an acoustic Doppler velocimeter (ADV), which is moved horizontally and vertically through a sampling grid. Multiple tests at some sites led to a total of 51 sets of cross-sectional measurements. ADVM measurements are simulated by interpolating …
Velocity Contour Weighting Method. I: Algorithm Development And Laboratory Testing, Daniel J. Howes, Brett F. Sanders
Velocity Contour Weighting Method. I: Algorithm Development And Laboratory Testing, Daniel J. Howes, Brett F. Sanders
BioResource and Agricultural Engineering
An algorithm is developed for real-time estimation of the cross-sectional average velocity of a channel flow by using an upward-looking pulsed wave acoustic Doppler velocity meters (ADVM). The Velocity Contour Weighting Method (VCWM) is applicable to gradually varied flows in prismatic channels and requires little to no calibration. VCWM estimates the average velocity as a weighted average of ADVM bin velocities. Weights are based on the velocity distribution sampled by the ADVM. Collectively, the VCWM is able to adapt to a wide range of channel geometry and roughness features. Expressions for the velocity weights are developed by first applying a …
The Economic Returns To U.S. Public Agricultural Research, Julian M. Alston, Matthew A. Anderson, Jennifer S. James, Phillip G. Pardey
The Economic Returns To U.S. Public Agricultural Research, Julian M. Alston, Matthew A. Anderson, Jennifer S. James, Phillip G. Pardey
Agribusiness
We use newly constructed state-specific data to explore the implications of common modeling choices for measures of research returns. Our results indicate that state-to-state spillover effects are important, that the research and development lag is longer than many studies have allowed, and that misspecification can give rise to significant biases. Across states, the average of the own-state benefit-cost ratios is 21:1, or 32:1 when the spillover benefits to other states are included. These ratios correspond to real internal rates of return of 9 or 10 per annum, much smaller than those typically reported in the literature, partly because we have …
Using System Dynamics Modelling Approach To Develop Management Tools For Animal Production With Emphasis On Small Ruminants, L. O. Tedeschi, C. F. Nicholson, E. Rich
Using System Dynamics Modelling Approach To Develop Management Tools For Animal Production With Emphasis On Small Ruminants, L. O. Tedeschi, C. F. Nicholson, E. Rich
Agribusiness
Small ruminants are important assets in several regions of the world. They account for more than half of the domesticated ruminants. Despite the growth in goat production in the world (more than 2% per year), research related to goat production is less than desired. One underused but potentially valuable approach for research on small ruminants is simulation modelling. Models of the components of small ruminant systems can enhance the financial returns and reduce negative environmental impacts. These models can be used to assess many dimensions of small ruminant production, from rumen dynamics to economic policies designed to support small ruminant …
Recommendations For Economic Development In Guadalupe, Ca, Larissa Requa Heeren
Recommendations For Economic Development In Guadalupe, Ca, Larissa Requa Heeren
Master's Theses
It is recommended that the City of Guadalupe prepare and implement a small-scale business expansion and retention program using existing service providers in the area. This type of program model seems to hold the most potential for Guadalupe. A mixed-methods approach including in-depth cases studies of existing economic development programs and an analysis of opportunities and constraints in Guadalupe informs a set recommendations for future economic development in the City. Data was collected in three phases: short interviews with a variety of economic development program staff, short interviews with Guadalupe business owners and City officials and in-depth interviews with staff …
Go Farm, Goleta: Urban Agriculture Protection For Eastern Goleta Valley, Eli M. Krispi
Go Farm, Goleta: Urban Agriculture Protection For Eastern Goleta Valley, Eli M. Krispi
Master's Theses
This paper explores two potential land use planning strategies that can be used to preserve and enhance the economic viability of agricultural operations surrounded by suburban development in Santa Barbara County’s Eastern Goleta Valley: buffers between agriculture and other land uses, and agritourism. In the case of buffers, academic literature is examined to determine how effective buffers are at various tasks (filtering runoff, mitigating dust and wind, providing habitat, etc.) and how to construct buffers to maximize their effectiveness. Land use plans and codes from several California jurisdictions are studied to see how buffers are put to use. Academic literature …
Food And Wine Tourism In Post-War Lebanon, Lindsay Milich
Food And Wine Tourism In Post-War Lebanon, Lindsay Milich
Recreation, Parks, and Tourism Administration
Tourism has played a major role in Lebanon since its peak period of 1930-1974; sometimes subsiding as a result of war and conflict, but always rebounding at least to some extent. Lebanon’s touristic appeal includes its geographic location between the East and the West, its varied landscape (beaches and mountains), its hospitable and diverse population, and its well loved cuisine. The focus of this study was food and wine initiatives across the country, and their role as related to the traditional tourism industry. The purpose of this study was to develop an understanding of the nature of regional and community …
The Costs Of Increased Localization For A Multiple-Product Food Supply Chain: Dairy In The United States, Charles F. Nicholson, Miguel I. Gomez, Oliver H. Gao
The Costs Of Increased Localization For A Multiple-Product Food Supply Chain: Dairy In The United States, Charles F. Nicholson, Miguel I. Gomez, Oliver H. Gao
Agribusiness
There is increased interest in greater localization of food supply chains but little evidence about the effects of localization on supply-chain costs. Assessing these effects is complex in multiple-product, multi-process supply chains such as the dairy industry. In this study, we develop a spatially-disaggregated transshipment model for the US dairy sector that minimizes total supply-chain costs, including assembly, processing, interplant transportation and final product distribution. We employ the cost-minimizing solution as benchmark to compare alternative scenarios of increased supply chain localization. Our results indicate: (1) short-run limits to increased localization, (2) modest impacts on overall supply-chain costs, and (3) large …
Factors That Influence Prices For Cool-Climate Wines: A Hedonic Analysis Of The Market For Riesling, Christiane Schroeter, Jennifer L. Ritchie, Bradley J. Rickard
Factors That Influence Prices For Cool-Climate Wines: A Hedonic Analysis Of The Market For Riesling, Christiane Schroeter, Jennifer L. Ritchie, Bradley J. Rickard
Agribusiness
The price of wine represents various characteristics that differentiate each bottle, assuming that the majority of consumers use price as a signal of quality. The objective of this study is to analyze the drivers of Riesling prices, since this varietal continues to gain popularity and can be grown in all climates, including cool-climate regions. We expand the use of quality ratings by including interaction terms to express wine-quality and price-quality relationships. The results suggest that higher price premiums are associated with wines that earned high expert rating scores, and this emphasizes the importance of market-perceived quality signals.
An Assessment Of The Demographics And Spending Behavior Of Attendees At San Luis Obispo's Downtown Farmers' Market, Morgan Thompson
An Assessment Of The Demographics And Spending Behavior Of Attendees At San Luis Obispo's Downtown Farmers' Market, Morgan Thompson
Recreation, Parks, and Tourism Administration
The purpose of this study was to assess the demographics and spending behavior of attendees at San Luis Obispo’s downtown Farmers’ Market. With the current 2011 economic recession in America, this study evaluated its affect on the Farmers’ Market attendee demographics and purchasing motivations. Using a questionnaire distributed to 200 participants at Farmers’ Market, this study concluded that most people are motivated by price when shopping for produce and the majority of Farmers’ Market attendees’ spending behaviors have been affected by the economic recession. Furthermore, this study found there is a preference for organic produce to be bought at the …
Growing Conflict: Agriculture, Innovation, And Immigration In San Luis Obispo County, 1837–1937, Douglas P. Jenzen
Growing Conflict: Agriculture, Innovation, And Immigration In San Luis Obispo County, 1837–1937, Douglas P. Jenzen
Master's Theses
The history of San Luis Obispo and its surrounding areas is complex. Agriculture, innovation, and immigration have all contributed to the formation of the region. The Spanish, Mexican, and early American periods established the framework successive waves of immigrants had to live within. Native Americans and immigrants from China, Portugal, Switzerland, Japan, the Philippines, and other regions of the United States have all toiled in the fields and contributed to America’s tables at various points throughout county history. Many contingencies determined the treatment of successive waves of immigrants. Growth and development are taking place at exponential rates on the very …
A Literary Analysis And Case Study Evaluation Of The Environmental, Cultural, And Economic Impacts Of Ecotourism, Ashley M. Driver
A Literary Analysis And Case Study Evaluation Of The Environmental, Cultural, And Economic Impacts Of Ecotourism, Ashley M. Driver
Social Sciences
No abstract provided.
College Food Systems Comparison, Courtney Fearon
College Food Systems Comparison, Courtney Fearon
Social Sciences
No abstract provided.
When Do Fat Taxes Increase Consumer Welfare?, Jayson L. Lusk, Christiane Schroeter
When Do Fat Taxes Increase Consumer Welfare?, Jayson L. Lusk, Christiane Schroeter
Agribusiness
Previous analyses of fat taxes have generally worked within an empirical framework in which it is difficult to determine whether consumers benefit from the policy. This note outlines on simple means to determine whether consumers benefit from a fat tax by comparing the ratio of expenditures on the taxed good to the weight effect of the tax against the individual’s willingness to pay for a one-pound weight reduction. Our empirical calculations suggest that an individual would have to be willing to pay about $1500 to reduce weight by one pound for a tax on sugary beverages to be welfare enhancing. …
Application Of A Simulation Model For Assessing Integration Of Smallholder Shifting Cultivation And Sheep Production In Yucatán, Mexico, David Parsons, Charles Nicholson, Robert W. Blake, Quirine M. Ketterings, Luis Ramírez-Aviles, Jerome H. Cherney, Danny G. Fox
Application Of A Simulation Model For Assessing Integration Of Smallholder Shifting Cultivation And Sheep Production In Yucatán, Mexico, David Parsons, Charles Nicholson, Robert W. Blake, Quirine M. Ketterings, Luis Ramírez-Aviles, Jerome H. Cherney, Danny G. Fox
Agribusiness
Simulation models are effective tools to examine interactions between livestock, cropping systems, households, and natural resources. Our study objective was to use an integrated livestock and crop model to assess the outcomes from selected suites of management decisions observed in smallholder sheep-cropping systems of Yucatán, Mexico. The scenarios contrasted specialized systems versus mixed farming, and evaluated the outcomes of increased crop-livestock integration. Mixed enterprise scenarios involving sheep provided more income than specialized enterprises, and capitalized on a lower price of on-farm maize grain, efficient utilization of surplus labor, and availability of common land. Labor and management income was greatest for …
Development And Evaluation Of An Integrated Simulation Model For Assessing Smallholder Crop-Livestock Production In Yucatán, Mexico, David Parsons, Charles F. Nicholson, Robert W. Blake, Quirine M. Ketterings, Luis Ramírez-Aviles, Danny G. Fox, Luis O. Tedeschi, Jerome H. Cherney
Development And Evaluation Of An Integrated Simulation Model For Assessing Smallholder Crop-Livestock Production In Yucatán, Mexico, David Parsons, Charles F. Nicholson, Robert W. Blake, Quirine M. Ketterings, Luis Ramírez-Aviles, Danny G. Fox, Luis O. Tedeschi, Jerome H. Cherney
Agribusiness
Mixed farming systems constitute a large proportion of agricultural production in the tropics, and provide multiple benefits for the world’s poor. However, our understanding of the functioning of these systems is limited. Modeling offers the best approach to quantify outcomes from many interacting causal variables in these systems. The objective of this study was to develop an integrated crop–livestock model to assess biophysical and economic consequences of farming practices exhibited in sheep systems of Yucatán state, Mexico. A Vensim™ dynamic stock-flow feedback model was developed to integrate scientific and practical knowledge of management, flock dynamics, sheep production, partitioning of nutrients, …