One step closer to a better starling trap

European starlings (Sturnus vulgaris) are an invasive species in the United States that damage agriculture, personal property, and threaten human health and safety. The U.S. Department of Agriculture Wildlife Services provides technical support to mitigate damage by controlling starling populations at concentrated animal feeding operations, landfills, utilities, and urban areas. Wildlife Services uses DRC-1339, a registered toxicant, to reduce starling populations. Trapping can also be an effective tool but requires more time at a higher cost than DRC-1339. Trapping starlings, however, may be needed to provide a viable alternative to mitigate damage in areas where toxicant use may be restricted. To address this need, I developed a unique and effective starling trap to increase catch rates. I began testing multiple trap designs in November 2007 at cattle (Bos taurus) feedlots, meat processing plants, and urban staging areas in a 45-km radius of the city of Omaha, Nebraska, USA. In December 2011, I designed a 4-chamber, basket-style starling trap that has been instrumental in a nearly 90% reduction of the roosting starling population in downtown Omaha. Herein, I discuss the development and testing of the trap and provide guidelines and instructions for building and strategic placement of the trap

A variation norm Carleson theorem

We strengthen the Carleson-Hunt theorem by proving $L^p$ estimates for the $r$-variation of the partial sum operators for Fourier series and integrals, for $p>\max\{r',2\}$. Four appendices are concerned with transference, a variation norm Menshov-Paley-Zygmund theorem, and applications to nonlinear Fourier transforms and ergodic theory.Comment: 41 page

European Starlings

European starlings (Sturnus vulgaris, Sturnidae) are native to Europe, southwest Asia, and North Africa and have successfully established populations on every continent but Antarctica (Rollins et al. 2009). In 1890 and 1891, a member of the American Acclimatization Society, Eugene Scheiffelin, released 100 starlings into New York City’s Central Park, with the objective of introducing all the birds mentioned in the plays of William Shakespeare to North America (Cabe 1993). He was successful, as 16 pairs survived and reproduced prolifically. Starlings reached the Mississippi River in 1928 and were observed on the West Coast in 1942. In a little over a century, the United States (U.S.) starling population grew to approximately 200 million (Feare 1984; Cabe 1993; Johnson and Glahn 1994), but has now declined to about 140 million (Jernelov 2017). They now inhabit all of North America. Their range extends southward to the Bahamas, Central America, the Yucatan Peninsula, Puerto Rico, Jamaica, and Cuba. There are no subspecies in North America. Genetic analysis indicates that all starlings in North America descended from the New York City colony (Cabe 1993). Outside their native range, starlings are considered to be one of the most destructive invasive bird species worldwide, nominated by the Invasive Species Specialist Group, a science and policy network under the Species Survival Commission of the International Union for Conservation of Nature, to the “100 World’s Worst” invaders (Lowe et al. 2004; Rollins et al. 2009)

European Starlings

European starlings (Sturnus vulgaris, Sturnidae) are native to Europe, southwest Asia, and North Africa and have successfully established populations on every continent but Antarctica (Rollins et al. 2009). In 1890 and 1891, a member of the American Acclimatization Society, Eugene Scheiffelin, released 100 starlings into New York City’s Central Park, with the objective of introducing all the birds mentioned in the plays of William Shakespeare to North America (Cabe 1993). He was successful, as 16 pairs survived and reproduced prolifically. Starlings reached the Mississippi River in 1928 and were observed on the West Coast in 1942. In a little over a century, the United States (U.S.) starling population grew to approximately 200 million (Feare 1984; Cabe 1993; Johnson and Glahn 1994), but has now declined to about 140 million (Jernelov 2017). They now inhabit all of North America. Their range extends southward to the Bahamas, Central America, the Yucatan Peninsula, Puerto Rico, Jamaica, and Cuba. There are no subspecies in North America. Genetic analysis indicates that all starlings in North America descended from the New York City colony (Cabe 1993). Outside their native range, starlings are considered to be one of the most destructive invasive bird species worldwide, nominated by the Invasive Species Specialist Group, a science and policy network under the Species Survival Commission of the International Union for Conservation of Nature, to the “100 World’s Worst” invaders (Lowe et al. 2004; Rollins et al. 2009)

The Effects on Washington State Industrial Arts Program of Eliminating the Practical Arts Requirement for High School Graduation

The study attempted to determine whether the detriments or gains to industrial arts are caused by the elimination of the Practical Arts Requirement or by other influences. The study was made to enable teachers of industrial arts, school administrators, and school boards to fit the industrial arts program of their schools to the changes caused by the elimination of the Practical Arts Requirement

Changing fertilizer management practices in sugarcane production: cane grower survey insights

Improved fertilizer management practice in sugarcane production is a key component in plans to improve Great Barrier Reef (GBR) water quality. Research focused on understanding wider systemic factors that drive behavioral change in agriculture is currently limited, with the domi-nant focus on individual farmer and psychosocial factors. Adopting a wider systems perspective, this study examines farming behavior change and the role of supporting services among 238 sugarcane growers (74,597 hectares) in Queensland’s Wet Tropics region who completed surveys reporting on changes in the method they used to calculate fertilizer application rates, along with information on their farm business, socio-demographics and self-reported importance ratings on a variety of topics. Informed by the Theory of Planned Behavior., ssurvey data are analyzed us-ing regression models to identify factors influencing the change from traditional to improved practice, and early adoption of improved practice. Results indicate growers were less likely to change fertilizer practice if they regarded maintaining good relationships with other local growers as being extremely important, had off-farm income, or had not attended a govern-ment-funded fertilizer management workshop in the five years preceding the survey. Similar drivers acted to promote or delay early adoption of improved practice. Results demonstrate the influence of government-funded services to support practice change

Effect of two-particle correlations on x-ray coherent diffractive imaging studies performed with continuum models

Coherent diffraction imaging (CDI) of single molecules at atomic resolution is a major goal for the x-ray free electron lasers (XFELs). However, during an imaging pulse, the fast laser-induced ionization may strongly affect the recorded diffraction pattern of the irradiated sample. The radiation tolerance of the imaged molecule should then be investigated 'a priori' with a dedicated simulation tool. The continuum approach is a powerful tool for modeling the evolution of irradiated large systems consisting of more than a few hundred thousand atoms. However, this method follows the evolution of average single-particle densities, and the experimentally recorded intensities reflect the spatial two-particle correlations. The information on these correlations is then inherently not accessible within the continuum approach. In this paper we analyze this limitation of continuum models and discuss the applicability of continuum models for imaging studies. We propose a formula to calculate scattered intensities (including both elastic and inelastic scattering) from the estimates obtained with a single-particle continuum model. We derive this formula for systems under conditions typical for CDI studies with XFELs

Thermal photogrammetric imaging:a new technique for monitoring dome eruptions

Structure-from-motion (SfM) algorithms greatly facilitate the generation of 3-D topographic models from photographs and can form a valuable component of hazard monitoring at active volcanic domes. However, model generation from visible imagery can be prevented due to poor lighting conditions or surface obscuration by degassing. Here, we show that thermal images can be used in a SfM workflow to mitigate these issues and provide more continuous time-series data than visible counterparts. We demonstrate our methodology by producing georeferenced photogrammetric models from 30 near-monthly overflights of the lava dome that formed at Volcán de Colima (Mexico) between 2013 and 2015. Comparison of thermal models with equivalents generated from visible-light photographs from a consumer digital single lens reflex (DSLR) camera suggests that, despite being less detailed than their DSLR counterparts, the thermal models are more than adequate reconstructions of dome geometry, giving volume estimates within 10% of those derived using the DSLR. Significantly, we were able to construct thermal models in situations where degassing and poor lighting prevented the construction of models from DSLR imagery, providing substantially better data continuity than would have otherwise been possible. We conclude that thermal photogrammetry provides a useful new tool for monitoring effusive volcanic activity and assessing associated volcanic risks