The Value of Conservation Easements: An analysis of the effects of conservation easements on property values in Central Vermont.

This capstone research aims to explore the possibilities of an association between changes in the fair market value of landed properties and their proximity to land parcels containing conservation easements. The study attempts to provide a greater understanding of how conservation easements provide benefits to Vermont municipalities. These benefits are described as ecosystem services, and their value was proxied by increases in the fair market value of transferred real-estate located within two distinct radiuses of the conserved land. The study focuses on two specific properties located in the towns of Marshfield and East Montpelier. For each town, four separate datasets were created depicting five year time intervals, before and after conservation occurred, as well as location proximity of two and six mile distances to the target conservation land for Marshfield and two and four mile distances to the target conservation land for East Montpelier. For the town of Marshfield, the data presented a positive association between the increased property transfer values and proximity to the target conservation land. For the town of East Montpelier, it was discovered that despite an overall downward trend in property transfer values between the two time intervals, the parcels located within two miles of the conservation land decreased in value to a lesser extent than those further than 2 miles away. The research findings present an interesting opportunity for further discussion surrounding the association of property values and proximity to existing conservation land within the state of Vermont, but this study suggests that in addition to the preservation of ecosystem services there exist actual quantifiable monetary benefits for land conservation to the municipalities of central Vermont

A New Measure Of Parental Self-efficacy For Enacting Healthy Lifestyles In Their Children

The issue of childhood obesity has become a pandemic of increasing prevalence and concern. Many behaviors contributing to overweight and obesity, such as dietary intake and physical activity, are learned in childhood. It is known that parents are key agents for change in their children. Therefore, interventions aimed at decreasing childhood overweight and obesity should be targeted at parents. Many parents state that they know the healthy dietary and physical activity behaviors they should adopt for their children, but lack the confidence, or self-efficacy, to enact these behaviors. A review of the literature for self-efficacy for behaviors in these domains in parents, adults and children uncovered many key elements involved. A search for an instrument to measure parental self-efficacy was unsuccessful in locating such an instrument, so several instruments in related domains were analyzed for content and utility for the generation of a new questionnaire. A 34-item questionnaire to measure parental self-efficacy for enacting healthy dietary and physical activity behaviors in their children 6-11 years old was developed and tested with a sample of 146 parents of children 6-11 years old, who could read and write English and had access to a computer with the internet. Internal reliability of the total scale was 0.94 and the two factors, dietary behaviors (DB) and physical activity behaviors (PAB) were 0.93 and 0.94, respectively. Test-retest reliability was also significant (

Fat and lean tissue accretion in relation to reward motivation in children

‘Reward sensitivity’ explains inter-individual differences in the motivation to obtain rewards when reward cues are perceived. This psychobiological trait has been linked to higher consumption of palatable food when exposed to palatable food cues. The current study aims to examine if reward sensitivity explains differences in patterns of fat and lean tissue accretion over time in children. A longitudinal observational study with measurement waves in 2011 (baseline), 2012, 2013, and 2015 was conducted. The sample was a population-based Flemish cohort of children (n = 446, 50% boys and 5.5–12 years at baseline; 38.8% of the baseline sample also participated in 2015). Baseline reward sensitivity of the children was assessed by parent ratings on the Drive subscale of the Behavioral Inhibition System/Behavioral Approach System scales. Age- and sex-independent Fat and Lean Mass Index z-scores (zFMI and zLMI respectively) were computed for each study wave based on air-displacement plethysmography. In girls, but not boys, reward sensitivity was positively associated with the baseline zFMI and zLMI (95% confidence intervals of unstandardized estimates: 0.01 to 0.11 and 0.01 to 0.10 respectively, P values 0.01 and 0.02 respectively). Further, reward sensitivity explained 14.8% and 11.6% of the change in girls' zFMI and zLMI respectively over four years: the zFMI and zLMI increased and decreased respectively in high reward sensitive girls (95% confidence intervals of unstandardized estimates: 0.01 to 0.11 and −0.12 to −0.01 respectively, P values 0.01 and 0.02 respectively). Hence, girls high in reward sensitivity had significantly higher adiposity gain over four years parallel with lower increase in lean mass than was expected on the basis of their age and height. These results may help to identify appropriate targets for interventions for obesity prevention

Evaluation of trend localization with multi-variate visualizations

Fig. 1 . Multi-variate visualization techniques we evaluated in our study, from left to right: Brush Strokes, Data-Driven Spots, Oriented Slivers, Color Blending, and Dimensional Stacking. These images depict a tri-county area in central Ohio. The encoded information is generated from a synthetic data set generated for the purposes of the study. See Section 3 for a explanation of the encoding. Abstract-Multi-valued data sets are increasingly common, with the number of dimensions growing. A number of multi-variate visualization techniques have been presented to display such data. However, evaluating the utility of such techniques for general data sets remains difficult. Thus most techniques are studied on only one data set. Another criticism that could be levied against previous evaluations of multi-variate visualizations is that the task doesn't require the presence of multiple variables. At the same time, the taxonomy of tasks that users may perform visually is extensive. We designed a task, trend localization, that required comparison of multiple data values in a multi-variate visualization. We then conducted a user study with this task, evaluating five multivariate visualization techniques from the literature (Brush Strokes, Data-Driven Spots, Oriented Slivers, Color Blending, Dimensional Stacking) and juxtaposed grayscale maps. We report the results and discuss the implications for both the techniques and the task

Digital Learning and Development Environment: NEH White Paper

Wayne State University’s Digital Learning and Development Environment was a research and development project aimed at developing a prototype for a systematic approach to digital learning using image repositories. The repositories used in the project were two of the Wayne State University Library System’s (WSULS) Digital Collections: Virtual Motor City and Digital Dress. The Collections are web portals providing universal access to digitized objects of cultural history from dispersed holdings of WSULS’s institutional partners. The project integrates easy-to-use technical tools with instructional design principles and resources for digital teaching and learning. The result is a replicable web environment where faculty and students can use accessible tools to easily create Digital Learning Objects (DLOs) from collections of digital images. The unique design of the Environment places images from the Library\u27s Digital Collections in context with a tool that downloads the images into a learning object and also provides expert advice in the design of effective digital media for instructional presentations and assignments. Award Dates: 01/09/2009 – 08/31/2009 (no-cost extension until 10/31/2009) Outright Funds: $50,00

Clinical situations for which 3D printing is considered an appropriate representation or extension of data contained in a medical imaging examination: Neurosurgical and otolaryngologic conditions

BACKGROUND: Medical three dimensional (3D) printing is performed for neurosurgical and otolaryngologic conditions, but without evidence-based guidance on clinical appropriateness. A writing group composed of the Radiological Society of North America (RSNA) Special Interest Group on 3D Printing (SIG) provides appropriateness recommendations for neurologic 3D printing conditions. METHODS: A structured literature search was conducted to identify all relevant articles using 3D printing technology associated with neurologic and otolaryngologic conditions. Each study was vetted by the authors and strength of evidence was assessed according to published guidelines. RESULTS: Evidence-based recommendations for when 3D printing is appropriate are provided for diseases of the calvaria and skull base, brain tumors and cerebrovascular disease. Recommendations are provided in accordance with strength of evidence of publications corresponding to each neurologic condition combined with expert opinion from members of the 3D printing SIG. CONCLUSIONS: This consensus guidance document, created by the members of the 3D printing SIG, provides a reference for clinical standards of 3D printing for neurologic conditions

Coherent combining of high brightness tapered lasers in Master Oscillator Power Amplifier configuration

International audienceImproved diode laser beam combining techniques are in strong demand for applications in material processing. Coherent beam combining (CBC) is the only combining approach that has the potential to maintain or even improve all laser properties, and thus has high potential for future systems. As part of our ongoing studies into CBC of diode lasers, we present recent progress in the coherent superposition of high-power single-pass tapered laser amplifiers. The amplifiers are seeded by a DFB laser at λ = 976 nm, where the seed is injected into a laterally single-mode ridge-waveguide input section. The phase pistons on each beam are actively controlled by varying the current in the ridge section of each amplifier, using a sequential hill-climbing algorithm, resulting in a combined beam with power fluctuations of below 1%. The currents into the tapered sections of the amplifiers are separately controlled, and remain constant. In contrast to our previous studies, we favour a limited number of individual high-power amplifiers, in order to preserve a high extracted power per emitter in a simple, low-loss coupling arrangement. Specifically, a multi-arm interferometer architecture with only three devices is used, constructed using 6 mm-long tapered amplifiers, mounted junction up on C-mounts, to allow separate contact to single mode and amplifier sections. A maximum coherently combined power of 12.9 W is demonstrated in a nearly diffraction-limited beam, corresponding to a 65% combining efficiency, with power mainly limited by the intrinsic beam quality of the amplifiers. Further increased combined power is currently sought

Discovery and Early Evolution of ASASSN-19bt, the First TDE Detected by TESS

We present the discovery and early evolution of ASASSN-19bt, a tidal disruption event (TDE) discovered by the All-Sky Automated Survey for Supernovae (ASAS-SN) at a distance of $d\simeq115$ Mpc and the first TDE to be detected by TESS. As the TDE is located in the TESS Continuous Viewing Zone, our dataset includes 30-minute cadence observations starting on 2018 July 25, and we precisely measure that the TDE begins to brighten $\sim8.3$ days before its discovery. Our dataset also includes 18 epochs of Swift UVOT and XRT observations, 2 epochs of XMM-Newton observations, 13 spectroscopic observations, and ground data from the Las Cumbres Observatory telescope network, spanning from 32 days before peak through 37 days after peak. ASASSN-19bt thus has the most detailed pre-peak dataset for any TDE. The TESS light curve indicates that the transient began to brighten on 2019 January 21.6 and that for the first 15 days its rise was consistent with a flux $\propto t^2$ power-law model. The optical/UV emission is well-fit by a blackbody SED, and ASASSN-19bt exhibits an early spike in its luminosity and temperature roughly 32 rest-frame days before peak and spanning up to 14 days that has not been seen in other TDEs, possibly because UV observations were not triggered early enough to detect it. It peaked on 2019 March 04.9 at a luminosity of $L\simeq1.3\times10^{44}$ ergs s$^{-1}$ and radiated $E\simeq3.2\times10^{50}$ ergs during the 41-day rise to peak. X-ray observations after peak indicate a softening of the hard X-ray emission prior to peak, reminiscent of the hard/soft states in X-ray binaries.Comment: 23 pages, 14 figures, 5 tables. A machine-readable table containing the host-subtracted photometry presented in this manuscript is included as an ancillary fil

Review of the Performance of Residential PV systems in Belgium

The main objective of this paper is to review the state of the art of residential PV systems in Belgium by the analysis of the operational data of 993 installations. For that, three main questions are posed: how much energy do they produce? What level of performance is associated to their production? Which are the key parameters that most influence their quality? This work brings answers to these questions. A middling commercial PV system, optimally oriented, produces a mean annual energy of 892 kWh/kWp. As a whole, the orientation of PV generators causes energy productions to be some 6% inferior to optimally oriented PV systems. The mean performance ratio is 78% and the mean performance index is 85%. That is to say, the energy produced by a typical PV system in Belgium is 15% inferior to the energy produced by a very high quality PV system. Finally, on average, the real power of the PV modules falls 5% below its corresponding nominal power announced on the manufacturer's datasheet. Differences between real and nominal power of up to 16% have been detected