8,670 research outputs found
Subsonic longitudinal aerodynamic characteristics of a vectored-engine-over-wing configuration having spanwise leading-edge vortex enhancement
A configuration which integrates a close coupled canard wing combination, spanwise blowing for enhancement of the wing leading edge vortex, an engine-over-wing concept, and a wing trailing edge coanda-effect flap is studied. The data on the configuration are presented in tabular from without discussion. The investigation was conducted in the Langley 7- by 10-foot high speed tunnel at a Mach number of 0.166 through an angle-of-attack range from -2 to 22 deg. Rectangular main engine nozzles of aspect ratio 4, 6, and 8 were tested over a momentum coefficient range from 1.0 to 1.8
Estimates of the Welfare Impact of Intragenic and Transgenic GM Labeling Policies
Agricultural and Food Policy, Food Consumption/Nutrition/Food Safety,
Demand Curve Effects in Experimental Auctions: The Effect of Quantity Already Owned
Most studies utilizing experimental auction mechanisms to elicit consumers’ willingness to pay are designed to avoid potential substitution or demand-curve effects that may influence bid prices. However, previous research and auction designs have not considered the potential impact on bid prices of commodity inventories held by auction participants that were obtained through transactions outside of the auction. This omission may present a problem for interpreting and analyzing auction data. Using bids from a random nth-price auction of fresh vegetables conducted in a laboratory style setting, we test whether participants’ outside inventories affect bidding behavior. We find that bidders do in fact consider their inventories, resulting in lower bid prices by individuals with quantity already owned.Consumer/Household Economics, Demand and Price Analysis,
Improving the Nutrient Content of Food through Genetic Modification: Evidence from Experimental Auctions on Consumer Acceptance
This paper assesses consumers’ acceptance of nutritionally enhanced vegetables using a series of auction experiments administered to a random sample of adult consumers. Evidence suggests that consumers are willing to pay significantly more for fresh produce with labels signaling enhanced levels of antioxidants and vitamin C achieved by moving genes from within the species, as opposed to across species. However, this premium is significantly affected by diverse information treatments injected into the experiments.Bayesian analysis, experimental auction, food products, genetic modification, Consumer/Household Economics, Food Consumption/Nutrition/Food Safety,
A Description and Comparison of the Perceptions of NCAA Division II and Division III College Presidents regarding the Impacts of Intercollegiate Athletics at their Institutions
The purpose of this study was to describe and compare the perceptions of NCAA Division II and NCAA Division III college and university presidents regarding the impacts of intercollegiate athletics at their institutions. The data were collected with an anonymous online survey instrument developed by the researcher and sent via email using SurveyMonkey. The survey included Likert-type items that were divided into four subscales constructed from phenomena that were gleaned from the literature: (1) Financial Impact subscale, (2) Enrollment Impact subscale, (3) Marketing Impact subscale, and (4) Student Impact subscale.;The survey was emailed to the entire population of all NCAA Division II and NCAA Division III college and university presidents (N=760). When data collection was complete, 323 responses (42.5%) were determined to be usable---147 NCAA Division II responses and 176 NCAA Division III responses. Four separate independent samples t-tests were used to compare the presidents\u27 perceptions regarding the impacts of athletics on each of the four subscales.;The t-tests revealed that statistically significant differences do not exist between the two groups on the Financial Impact subscale and the Student Impact subscale, but a statistically significant difference between the two groups does exist for both the Enrollment Impact subscale (p=.014) and for the Marketing Impact subscale (p\u3c.001).;Descriptive statistics revealed that both the NCAA Division II presidents and the NCAA Division III presidents perceive that intercollegiate athletics impacts their institutions positively. The items from each subscale to which the presidents responded most strongly are also reported. Descriptive statistics also revealed that the presidents\u27 perceptions do not always align with the literature regarding athletics in higher education. Finally, descriptive statistics revealed that the NCAA Division III presidents\u27 perceptions are more divided regarding these issues than the NCAA Division II presidents. Implications for practice and future research are provided
Ordered Measurements of Permutationally-Symmetric Qubit Strings
We show that any sequence of measurements on a permutationally-symmetric
(pure or mixed) multi-qubit string leaves the unmeasured qubit substring also
permutationally-symmetric. In addition, we show that the measurement
probabilities for an arbitrary sequence of single-qubit measurements are
independent of how many unmeasured qubits have been lost prior to the
measurement. Our results are valuable for quantum information processing of
indistinguishable particles by post-selection, e.g. in cases where the results
of an experiment are discarded conditioned upon the occurrence of a given event
such as particle loss. Furthermore, our results are important for the design of
adaptive-measurement strategies, e.g. a series of measurements where for each
measurement instance, the measurement basis is chosen depending on prior
measurement results.Comment: 13 page
Analysis of multi-sensor data, 12 September - 11 December 1968
Analysis of multi-sensor data obtained by Earth Resources Aircraft Progra
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