746 research outputs found
Private Options to Use Public Goods: Exploiting Revealed Preferences to Estimate Environmental Benefits
We develop and apply a new method for estimating the economic benefits of an environmental amenity. The method fits within the household production framework (Becker 1965), and is based upon the notion of estimating the derived demand for a privately traded option to utilize a freely-available public good. In particular, the demand for state fishing licenses is used to infer the benefits of recreational fishing. Using panel data on state fishing license sales and prices for the continental United States over a fifteen-year period, combined with data on substitute prices and demographic variables, a license demand function is estimated with instrumental variable procedures to allow for the potential endogeneity of administered prices. The econometric results lead to estimates of the benefits of a fishing license, and subsequently to the expected benefits of a recreational fishing day. In contrast with previous studies, which have utilized travel cost or hypothetical market methods, our approach provides estimates that are directly comparable across geographic areas. Further, our results suggest that the benefits of recreational fishing days are generally less than previously estimated.
Influence of Stellate Ganglion Stimulation on Morphology of Alveolar Type II Cells
This research provides ultrastructural information regarding pulmonary surfactant secretion from stimulation of adrenergic pathways to the lung via the stellate ganglion. This information will help clarify the important role of the sympathetic nervous system in surfactant disorders. It also provides insight into sympathetic mechanisms causing surfactant derangement in adult and infant respiratory distress syndromes (RDS). Basic cellular mechanisms of surfactant metabolism, including synthesis and packaging in lamellar bodies, were studied. Results shed light on these basic processes of lung cell function.
The results of this study provide new avenues for studying a problem in health care that has long resisted advances, that of surfactant replacement therapy. It is expected that the results of this research, taken with information from other researches, will ultimately reduce the 50% mortality rate of the 150,000 patients annually suffering from RDS (Andreadis and Petty 1985)
Private Options to Use Public Goods Exploiting Revealed Preferences to Estimate Environmental Benefits
We develop and apply a new method for estimating the economic benefits of an environmental amenity. The method fits within the household production framework (Becker 1965), and is based upon the notion of estimating the derived demand for a privately traded option to utilize a freely-available public good. In particular, the demand for state fishing licenses is used to infer the benefits of recreational fishing. Using panel data on state fishing license sales and prices for the continental United States over a fifteen-year period, combined with data on substitute prices and demographic variables, a license demand function is estimated with instrumental variable procedures to allow for the potential endogeneity of administered prices. The econometric results lead to estimates of the benefits of a fishing license, and subsequently to the expected benefits of a recreational fishing day. In contrast with previous studies, which have utilized travel cost or hypothetical market methods, our approach provides estimates that are directly comparable across geographic areas. Further, our results suggest that the benefits of recreational fishing days are generally less than previously estimated.Private Options, Public Goods, Environmental Benefits
How Newspapers in Kansas Are Using News Releases from K-State Research and Extension
This study looks at how newspaper editors in Kansas use news releases from Kansas State University Research and Extension (KSRE), which distributes more than 700 news releases annually to newspapers across the state. An analysis of clippings over 10 weeks showed that editors rarely change the original text or headline in KSRE news releases, and more than half of the releases were published within 10 days of release. KSRE news releases were published in all regions of Kansas. Using a formula to determine the advertising equivalency value of news clips, the data indicates a value of $33,286.94 for the sample studied. The findings provide one way in which to report accountability to the organization’s administrators, as well as a better understanding of possible areas of improvement for the KSRE news office
Private Options to Use Public Goods Exploiting Revealed Preferences to Estimate Environmental Benefits
We develop and apply a new method for estimating the economic benefits of an environmental amenity. The method fits within the household production framework (Becker 1965), and is based upon the notion of estimating the derived demand for a privately traded option to utilize a freely-available public good. In particular, the demand for state fishing licenses is used to infer the benefits of recreational fishing. Using panel data on state fishing license sales and prices for the continental United States over a fifteen-year period, combined with data on substitute prices and demographic variables, a license demand function is estimated with instrumental variable procedures to allow for the potential endogeneity of administered prices. The econometric results lead to estimates of the benefits of a fishing license, and subsequently to the expected benefits of a recreational fishing day. In contrast with previous studies, which have utilized travel cost or hypothetical market methods, our approach provides estimates that are directly comparable across geographic areas. Further, our results suggest that the benefits of recreational fishing days are generally less than previously estimated
The initiation of a literature-based composition program in a fifth-grade classroom
A worthy goal for educators is the continued search for an understanding of children\u27s learning. Continued research and observation of children in a variety of settings provide educators with theoretical perspectives and methodological applications for classroom instruction
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Mistimed restricted feeding disrupts circadian rhythms of male mating behavior and female preovulatory LH surges in mice.
In rodents, eating at atypical circadian times, such as during the biological rest phase when feeding is normally minimal, reduces fertility. Prior findings suggest this fertility impairment is due, at least in part, to reduced mating success. However, the physiological and behavioral mechanisms underlying this reproductive suppression are not known. In the present study, we tested the hypothesis that mistimed feeding-induced infertility is due to a disruption in the normal circadian timing of mating behavior and/or the generation of pre-ovulatory luteinizing hormone (LH) surges (estrogen positive feedback). In the first experiment, male+female mouse pairs, acclimated to be food restricted to either the light (mistimed feeding) or dark (control feeding) phase, were scored for mounting frequency and ejaculations over 96 h. Male mounting behavior and ejaculations were distributed much more widely across the day in light-fed mice than in dark-fed controls and fewer light-fed males ejaculated. In the second experiment, the timing of the LH surge, a well characterized circadian event driven by estradiol (E2) and the SCN, was analyzed from serial blood samples taken from ovariectomized and E2-primed female mice that were light-, dark-, or ad-lib-fed. LH concentrations peaked 2 h after lights-off in both dark-fed and ad-lib control females, as expected, but not in light-fed females. Instead, the normally clustered LH surges were distributed widely with high inter-mouse variability in the light-fed group. These data indicate that mistimed feeding disrupts the temporal control of the neural processes underlying both ovulation and mating behavior, contributing to infertility
Flood Mapping of Recent Major Hurricane Events with Synthetic Aperture Radar, Commercial Imaging, and Aerial Observations
Floodwater mapping is an important remote sensing process that is used for disaster response, recovery, and damage assessment practices. Developing a system to read in Synthetic Aperture Radar (SAR) data and perform land cover classification will allow for the production of near real-time inundation mapping, enabling government and emergency response entities to get a preliminary idea of the situation. SAR is a unique remote sensing tool. Data in this project was obtained by NASA Jet Propulsion Laboratorys Uninhabited Aerial Vehicle SAR (UAVSAR), an L-band radar mounted to a Gulfstream III jet. Data collected by UAVSAR is similar to what will be available from the NASA-Indian Space Research Organization (NISAR) mission starting in early 2022. Using Python and ArcGIS applications, a model was developed using training samples taken from NOAA post-event aerial photography and UAVSAR data gathered in the aftermath of Hurricane Florence in September 2018
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