Fish Associated with Dikes, Revetments, and Abandoned Channels in the Middle Missouri River

Fish associated with dikes, revetments, and abandoned channels along the Iowa-Nebraska portion of the Missouri River were collected by seining, electrofishing, and hoop netting in June, August, and October 1983. Samples collected by seining dike fields and abandoned channels were\u27 dominated by Cyprinidae and Centrarchidae. Electrofishing samples were dominated by flathead catfish (Pylodictus olivaris), gold eye (Hiodon alosoides), common carp (Cyprinus carpio), river carpsucker, (Carpiodes carpio), gizzard shad (Dorosoma cepedianum), and blue sucker (Cycleptus elongatus) in dike fields and revetted banks and by gizzard shad, river carpsucker, and bigmouth buffalo (lctiobus cyprinellus) in the abandoned channels. Among fish collected in unbaited hoop nets, blue suckers and channel catfish (lctalurus punctatus) were prevalent in dike fields; blue suckers, flathead catfish, and shortnose gar (Lepisosteus platostomus) along revetted banks; and white crappie (Pomoxis annualaris), black crappie (P. nigromaculatus), river carpsucker, black bullhead (lctalurus melas), bigmouth buffalo, and gizzard shad in abandoned channels. Gear selectivity and differences in sampling efficiency in the diverse riverine habitats precluded statistical comparisons of most samples and stressed the need for development of improved sampling techniques and designs for large river fishery research

Startup of the High-Intensity Ultracold Neutron Source at the Paul Scherrer Institute

Ultracold neutrons (UCN) can be stored in suitable bottles and observed for several hundreds of seconds. Therefore UCN can be used to study in detail the fundamental properties of the neutron. A new user facility providing ultracold neutrons for fundamental physics research has been constructed at the Paul Scherrer Institute, the PSI UCN source. Assembly of the facility finished in December 2010 with the first production of ultracold neutrons. Operation approval was received in June 2011. We give an overview of the source and the status at startup.Comment: Proceedings of the International Conference on Exotic Atoms and Related Topics - EXA2011 September 5-9, 2011 Austrian Academy of Sciences, Theatersaal, Sonnenfelsgasse 19, 1010 Wien, Austria 6 pages, 3 figure

Access Anglesey 2018: Lessons from an inclusive field course

Abstract. Traditional methods of fieldwork delivery can present learners with a range of physical, cognitive and social challenges which may subsequently hinder their ability to engage effectively with learning. We developed a residential geoscience field course designed to be physically accessible to, and socially inclusive of, a diverse range of learners including those with limited physical mobility and neurodiverse conditions. This paper presents the logistical and pedagogical challenges involved in delivering such a field course. In terms of pedagogic design scheduling, pace and timing, and the ability to access content in multiple ways were critical to ensuring that all students were included in the learning. The most effective mitigations were the simplest and benefitted the whole group. Practical interventions found to support access and inclusion for the benefit of all participants included using an audio tour-guide system to communicate with students at field locations, using a four-wheel drive vehicle to improve access to specific locations, providing alternative exercises such as prepared photomicrographs and rock specimens, providing electronic tablets with suitable apps, and selecting accommodation with accessible common-room spaces, and a dedicated quiet room. </jats:p

Achieving Inclusive Field-based Education: Results and Recommendations from an Accessible Geoscience Field Trip

Learners with disabilities are often denied field-based learning experiences in naturalistic disciplines. Geology can present substantial barriers due to rugged terrain in difficult-to-reach locations. In 2014, a field trip was executed with the dual purpose of 1) designing inclusion in field learning and 2) demonstrating to college faculty an accessible field experience. Direct observations of participants on the trip, as well as pre- and post-trip focus groups, illuminate the student and faculty field learning experience. Geoscience faculty have little guidance or support in understanding what disability is, how to reconcile accommodation with field-geology learning goals, and they cited instances where disability service providers acted as gatekeepers. The net effect of these ontologies is to reduce faculty empathy with, and thus their ability to be inclusive of, students with disabilities in field settings. Recommendations for teachers include taking campus disability-services administrators on field trips, opening and maintaining communications with disability service providers, and designing pedagogically sound field trips that align as much as possible to principles of universal design. An advocacy approach is described, which focuses on the students and the educational process, instead of on institutional compliance. Finally, geoscience faculty should conceptualize disability service providers as accessibility service providers

Making geoscience fieldwork inclusive and accessible for students with disabilities

No embargo require

Cross-sections of spallation residues produced in 1.A GeV 208Pb on proton reactions

Spallation residues produced in 1 GeV per nucleon $^{208}$Pb on proton reactions have been studied using the FRagment Separator facility at GSI. Isotopic produc- tion cross-sections of elements from $_{61}$Pm to $_{82}$Pb have been measured down to 0.1 mb with a high accuracy. The recoil kinetic energies of the produced fragments were also determined. The obtained cross-sections agree with most of the few existing gamma-spectroscopy data. Data are compared with different intra nuclear-cascade and evaporation-fission models. Drastic deviations were found for a standard code used in technical applications.Comment: 4 pages, 3 figures, accepted for publication in Phys. Rev. Lett. Revised version May 12, 200

Spallation Residues in the Reaction 56Fe + p at 0.3, 0.5, 0.75, 1.0 and 1.5 A GeV

The spallation residues produced in the bombardment of 56}Fe at 1.5, 1.0, 0.75, 0.5 and 0.3 A GeV on a liquid-hydrogen target have been measured using the reverse kinematics technique and the Fragment Separator at GSI (Darmstadt). This technique has permitted the full identification in charge and mass of all isotopes produced with cross-sections larger than 10^{-2} mb down to Z=8. Their individual production cross-sections and recoil velocities at the five energies are presented. Production cross-sections are compared to previously existing data and to empirical parametric formulas, often used in cosmic-ray astrophysics. The experimental data are also extensively compared to different combinations of intra-nuclear cascade and de-excitation models. It is shown that the yields of the lightest isotopes cannot be accounted for by standard evaporation models. The GEMINI model, which includes an asymmetric fission decay mode, gives an overall good agreement with the data. These experimental data can be directly used for the estimation of composition modifications and damages in materials containing iron in spallation sources. They are also useful for improving high precision cosmic-ray measurements.Comment: Submited to Phys. Rev. C (10/2006