31 research outputs found
Community Benefits and Lessons for Local Engagement in a California Open Streets Event: A Mixed-Methods Assessment of Viva CalleSJ 2018
This report presents the findings from an evaluation of the September 2018 Viva CalleSJ open streets event in San José,CA. The research was designed to assess the success of the event, guide planning for future open streets events, and inform potential funders and community partners about the benefits of such events. To gather the impressions of participants, local residents, and workers at businesses along the event route, the mixed-methods study analyzed results from a survey of 1,571participants, 114 interviews with community members and businesses, and participant observations. Researchers also examined social media presence and a related augmented reality gaming component. The study found that Viva CalleSJ 2018 participants were resoundingly positive about their experience. Many said that the event brought people together from across the city and inspired a sense of community and civic pride, and the majority of participants benefited from at least one hour of physical activity. Most local businesses and residents viewed the event positively as well, and many food and beverage outlets appeared to benefit from increased patronage during the event. However, some shop keepers along the event route and residents in surrounding neighborhoods were not aware of Viva CalleSJ in the weeks prior to it happening or did not have a clear understanding of how it might impact them. Some were wary of the road closures and in some cases were ultimately frustrated by what they perceived to be negative impacts on their businesses
Waste Not, Want Not: The Potential for Urban Water Conservation in California
The largest, least expensive, and most environmentally sound source of water to meet California's future needs is the water currently being wasted in every sector of our economy. This report, "Waste Not, Want Not," strongly indicates that California's urban water needs can be met into the foreseeable future by reducing water waste through cost-effective water-saving technologies, revised economic policies, appropriate state and local regulations, and public education
Joint spatiotemporal models to predict seabird densities at sea
Introduction: Seabirds are abundant, conspicuous members of marine ecosystems worldwide. Synthesis of distribution data compiled over time is required to address regional management issues and understand ecosystem change. Major challenges when estimating seabird densities at sea arise from variability in dispersion of the birds, sampling effort over time and space, and differences in bird detection rates associated with survey vessel type.
Methods: Using a novel approach for modeling seabirds at sea, we applied joint dynamic species distribution models (JDSDM) with a vector-autoregressive spatiotemporal framework to survey data collected over nearly five decades and archived in the North Pacific Pelagic Seabird Database. We produced monthly gridded density predictions and abundance estimates for 8 species groups (77% of all birds observed) within Cook Inlet, Alaska. JDSDMs included habitat covariates to inform density predictions in unsampled areas and accounted for changes in observed densities due to differing survey methods and decadal-scale variation in ocean conditions.
Results: The best fit model provided a high level of explanatory power (86% of deviance explained). Abundance estimates were reasonably precise, and consistent with limited historical studies. Modeled densities identified seasonal variability in abundance with peak numbers of all species groups in July or August. Seabirds were largely absent from the study region in either fall (e.g., murrelets) or spring (e.g., puffins) months, or both periods (shearwaters).
Discussion: Our results indicated that pelagic shearwaters (Ardenna spp.) and tufted puffin (Fratercula cirrhata) have declined over the past four decades and these taxa warrant further investigation into underlying mechanisms explaining these trends. JDSDMs provide a useful tool to estimate seabird distribution and seasonal trends that will facilitate risk assessments and planning in areas affected by human activities such as oil and gas development, shipping, and offshore wind and renewable energy
Characterizing the Cool KOIs II. The M Dwarf KOI-254 and its Hot Jupiter
We report the confirmation and characterization of a transiting gas giant
planet orbiting the M dwarf KOI-254 every 2.455239 days, which was originally
discovered by the Kepler mission. We use radial velocity measurements, adaptive
optics imaging and near infrared spectroscopy to confirm the planetary nature
of the transit events. KOI-254b is the first hot Jupiter discovered around an
M-type dwarf star. We also present a new model-independent method of using
broadband photometry to estimate the mass and metallicity of an M dwarf without
relying on a direct distance measurement. Included in this methodology is a new
photometric metallicity calibration based on J-K colors. We use this technique
to measure the physical properties of KOI-254 and its planet. We measure a
planet mass of Mp = 0.505 Mjup, radius Rp = 0.96 Rjup and semimajor axis a =
0.03 AU, based on our measured stellar mass Mstar = 0.59 Msun and radius Rstar
= 0.55 Rsun. We also find that the host star is metal-rich, which is consistent
with the sample of M-type stars known to harbor giant planets.Comment: AJ accepted (in press
Continence technologies whitepaper: Informing new engineering science research
Advances in healthcare technology for continence have historically been limited compared to other areas of medicine, reflecting the complexities of the condition and social stigma which act as a barrier to participation. This whitepaper has been developed to inspire and direct the engineering science community towards research opportunities that exist for continence technologies that address unmet needs in diagnosis, treatment and long-term management. Our aim is to pinpoint key challenges and highlight related research opportunities for novel technological advances. To do so, we draw on experience and expertise from academics, clinicians, patients and patient groups linked to continence healthcare. This is presented in four areas of consideration: the clinical pathway, patient perspective, research challenges and effective innovation. In each we introduce seminal research, background information and demonstrative case-studies, before discussing their relevance to engineering science researchers who are interested in approaching this overlooked but vital area of healthcare
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The effect of formal instruction in test taking skills using the Riverside "Improving Test Taking Skills" materials on standardized achievement test scores of students in fourth and fifth grade.
Researchers have suggested that knowledge of how to take a test decreases the validity of achievement test scores as measures of content knowledge. Further, teaching students test taking skills generally improves student achievement test scores. However, little research exists regarding the efficacy of commercially prepared materials for formal test-wiseness instruction. Fourth and fifth grade students in 15 elementary schools participated in this study. Students in the Volunteer Selected group received instruction in test taking skills using the Riverside Improving Test Taking Skills materials. Students in the Volunteer Not-Selected group received whatever test taking skill instruction their teachers provided as a result of wanting, but not being selected, to participate in the study. Students in the Control group received what was considered "normal" instruction in test taking skills. A gain score ANOVA of NCE scores from standardized testing was used to determine statistical significance on the Composite Battery and the Reading and Mathematics subtests. When reliable differences were indicated effect sizes were calculated. Formal instruction in test taking skills resulted in significant effects for fourth grade students on the Composite battery and the Mathematics subtest. However, average gains for students in the Volunteer Not-Selected group were as great as for students who received instruction using the Riverside materials. Significant effects for the Reading subtest were indicated only for achievement level. Positive effects were indicated for fifth grade students in the Volunteer Not-Selected group on the Composite and Mathematics subtest. At the fourth grade differential effects were indicated for achievement level, sex, and SES, but not for ethnicity. At the fifth grade achievement level, sex, SES, and ethnicity resulted in differential effects for students in all three groups. In summary, test taking skill instruction appeared beneficial to fourth grade students regardless of whether the instruction was delivered using the Riverside materials or using teacher made or teacher collected materials. At the fifth grade data the results were less clear cut. Further research must be conducted before policies can be established and educators can use with confidence, or not use at all, commercially prepared test taking skill instructional materials
Integration of Bicycling and Walking Facilities into the Infrastructure of Urban Communities
Several manuals, handbooks and web resources exist to provide varied guidance on planning for and designing bicycle and pedestrian facilities, yet there are no specific indications about which of the varied treatments in these guides work well for users. This project highlights best practices and identifies program characteristics associated with high levels of non-motorized travel, with an emphasis on bicyclists and pedestrians. It highlights practices in the California communities of Davis, Palo Alto and San Luis Obispo. The case studies are used to illustrate how urban communities have integrated non-motorized transportation modes into the physical infrastructure and worked to educate community residents and employees. The most salient themes that emerged from this study are linked to the following user preference: (a) distance to desired land uses and activities; (b) route directness; (c) route connectivity; (d) the separation of motorized and non-motorized transportation modes; (e) safety; (f) convenience; and (g) education and outreach. The aforementioned themes are integrated into key guiding principles that correspond to the trip-making cycle, from the decision to engage in an activity through the choice of route to arrival at the destination