Excitations of the ν=5/2\nu=5/2 Fractional Quantum Hall State and the Generalized Composite Fermion Picture

We present a generalization of the composite Fermion picture for a muticomponent quantum Hall plasma which contains particle with different effective charges. The model predicts very well the low-lying states of a $\nu=5/2$ quantum Hall state found in numerical diagonalization.Comment: 5 pages, 3 figure

Application of a coupled human natural system framework to organize and frame challenges and opportunities for biodiversity conservation on private lands

Conservation science addresses the complementary goals of preventing future biodiversity loss while sustaining critical human foundations. In this paper we use two case studies focused on land management to discuss how private lands conservation can be more effective by considering how planning and decision making reflects a coupled human and natural system (CHANS). The first case study focuses on conservation easements in the temperate forests of eastern United States; the second focuses on conservation opportunities in Midwestern agroecosystems, in particular the value of agroforestry. For each case study we discuss the natural and human subsystems, how elements and interactions within and between subsystems (as organized by elements of CHANS) create challenges and opportunities for conservation, and the importance of considering relevant scales of subsystems. Review of these case studies demonstrates that additional insight gained by using a CHANS perspective, particularly given how the subsystems interact at different scales, improves identification of important points of social and ecological overlap, ultimately enhancing conservation research, planning, and practice

Variation in Bird Vocalizations across a Gradient of Traffic Noise as a Measure of an Altered Urban Soundscape

It is evident that widespread land use and land cover change, including increasing urbanization, are altering ecological processes. One modification gaining attention is increased anthropogenic noise associated with cities. To examine potential impacts of rising anthropogenic noise, we conducted an acoustic analysis of Brown-headed Nuthatch (Sitta pusilla) and Eastern Towhee (Pipilo erythrophthalmus) vocalizations in Greenville Co., South Carolina as a function of a gradient of increasing traffic noise. Our data demonstrate that even moderate levels of noise may alter the structure of avian vocalizations. In particular, the minimum frequency of the Brown-headed Nuthatch vocalization shifted upward to avoid acoustic overlap with the noise associated with vehicular traffic. Understanding the impacts of noise created by urbanization on songbird vocalizations provides insight into the altered soundscape as well as ecosystem health. Thus, it is essential that we monitor and understand the impacts of anthropogenic noise and implement effective city planning strategies to improve urban ecosystems. In addition, the evidence of birds’ response to increased traffic noise serves as a starting point to begin dialog between researchers and practitioners across environmental and public health fields

Fractional quantum Hall effect and electron correlations in partially filled first excited Landau level

We present a quantitative study of most prominent incompressible quantum Hall states in the partially filled first excited Landau level (LL1) which have been recently studied experimentally by Choi et al. The pseudopotential describing the electron - electron interaction in LL1 is harmonic at short range. It produces a series of incompressible states which is different from its LL0 counterpart. The numerical data indicate that the most prominent states $\nu={5/2}$, 7/3, and 8/3 are not produced by Laughlin correlated electrons, but result from a tendency of electrons to form pairs or larger clusters which eventually become Laughlin correlated. States with smaller gaps at filling factors 14/5, 16/7, 11/5, 19/7 are Laughlin correlated electron or hole states and fit Jain's sequence of filled $\rm{CF}^4$ levels.Comment: 4 pages, 7 figure

The joint US/UK 1990 epoch world magnetic model

A detailed summary of the data used, analyses performed, modeling techniques employed, and results obtained in the course of the 1990 Epoch World Magnetic Modeling effort are given. Also, use and limitations of the GEOMAG algorithm are presented. Charts and tables related to the 1990 World Magnetic Model (WMM-90) for the Earth's main field and secular variation in Mercator and polar stereographic projections are presented along with useful tables of several magnetic field components and their secular variation on a 5-degree worldwide grid

Effects of magnesium with or without boron on headshaking behavior in horses with trigeminal-mediated headshaking.

BackgroundOral administration of magnesium and boron might have a beneficial effect on headshaking behavior in horses.ObjectiveEvaluate the effects of oral magnesium alone or in combination with boron on headshaking behavior in affected horses.AnimalsTwelve geldings (6 healthy controls and 6 affected).MethodsProspective randomized controlled dietary trial over 42 days in 12 horses (6 horses diagnosed with trigeminal-mediated headshaking and 6 unaffected healthy controls). All horses received a hay diet and were randomized into 3 treatment groups: pelleted feed combination (PF), pelleted feed combination with magnesium (M), and pelleted feed combination with magnesium-boron (MB) with a week washout of hay only between treatments. Headshaking behavior and biochemical blood variables were assessed at baseline (hay only) and then after each week of supplementation.ResultsAll 3 diet interventions increased blood ionized and total magnesium. Groups M and MB further increased Mg2+ when compared to PF. Horses receiving treatments had a significant reduction in headshaking behavior, as measured by incidence rate ratio (IRR), when compared to unsupplemented hay diet (44% for PF, IRR, 0.558; CI, 0.44, 0.72; P < .001; 52% for M, IRR, 0.476; CI, 0.37, 0.62; P < .001; and 64% for MB, IRR, 0.358; CI, 0.27, 0.48; P < .001).Conclusions and clinical importanceMagnesium in combination with boron had the greatest decrease in headshaking. Oral supplementation with magnesium or magnesium in combination with boron should be considered in horses affected with headshaking

Missing Goals Yet Tangible Indicators within Sustainability Assessment Literature: The Need to Align Planning and Monitoring in Urban Sustainability

Sustainability assessment literature is often based on large indicator sets, frequently lacking organizational framing. Previous research calls for stronger theoretical groundings and for urban sustainability assessments specifically to be goal-oriented, meaning that assessments should articulate goals for sustainable cities and select the indicators most appropriate for tracking progress. Here we analyzed the content of 69 papers from sustainability assessment literature. We asked: What common sustainability goals guide indicator selection? What is the distribution of natural, proxy, and constructed indicators across the literature? And what is the distribution of indicators within and across capital types? We found that less than half of the papers define clear goals. Still, the majority of indicators used were natural indicators as opposed to proxies or constructed indicators. Most indicators are linked to the natural sciences, suggesting a need to expand and diversify indicators across additional capital assets, broadening the disciplinary foci of such assessments and better tying into the holistic and systems nature of sustainability. We conclude that urban sustainability assessment should be framed around sustainability goals, and that such a framing would facilitate the selection of indicators, which yield more accurate evaluative results. This is significant in that the relationship between sustainability assessment goals and indicators is mutually reinforcing

Intravenous infusion of magnesium sulfate and its effect on horses with trigeminal-mediated headshaking.

BackgroundTrigeminal-mediated headshaking results from low-threshold firing of the trigeminal nerve resulting in apparent facial pain. Magnesium may have neuroprotective effects on nerve firing that potentially dampen signs of neuropathic pain. This hypothesis has not been investigated in horses with trigeminal-mediated headshaking.ObjectiveTo investigate head-shaking behavior in affected horses after IV magnesium sulfate infusion.AnimalsSix geldings with trigeminal-mediated headshaking.MethodsProspective randomized crossover study. Horses were controlled for diet and infused IV with 5% dextrose solution (DS; control solution at 2 mL/kg body weight [BW]) and MgSO4 50% solution (MSS at 40 mg/kg BW). Head-shaking behavior was recorded at times T0 (baseline, before infusion) and T15, T30, T60, and T120 minutes post-infusion. Venous blood variables such as pH, HCO3 - , standard base excess (SBE), Na+ , Cl- , K+ , Ca2+ , Mg2+ , total magnesium (tMg), glucose, and lactate were measured; strong ion difference (SID) and anion gap (AG) were calculated for each time point.ResultsBlood variables including pH, Na+ , Cl- , K+ , SID, AG, lactate, Ca2+ , tMg, and Mg2+ had significant changes with MSS as compared to DS treatment. Glucose, SBE, and HCO3 - did not have significant changes. A 29% reduction in head-shaking rate occurred after MSS treatment but no change occurred after DS treatment.Conclusions and clinical importanceAdministration of MSS IV increased plasma total and ionized magnesium concentrations and significantly decreased head-shaking behavior in horses with trigeminal-mediated headshaking

Teacher Biography: SOLO Analysis of Preservice Teachers’ Reflections of their Experiences in Physical Education

Teacher biography, as a reflective practice, was implemented in the context of Physical Education in a primary teacher education course at a regional Australian university. Second year students were asked to provide descriptions of a critical incident they experienced at the primary or secondary level in a Physical Education or sporting context (N=214). Their responses comprised the data for this study and the Structure of Observed Learning Outcomes (SOLO) Model was used to determine the levels of complexity of the responses to ‘alternatives for action’ associated with these incidents. More responses were multistructural (48%), than relational (24%), and unistructural (23%), with extended abstract (3%) and the least, were prestructural (2%). The responses varied for gender and mode of enrolment (on or off campus). The findings that one third of students developed higher order (relational or extended abstract) responses challenge teacher educators to consider strategies to extend critical reflections

Quantifying the Soundscape: How Filters Change Acoustic Indices

Monitoring biodiversity can be time consuming and costly. Automated recording units (ARUs) have rapidly emerged as an efficient and cost-effective tool for measuring biodiversity. Acoustic indices are one output from recordings from ARUs that can be quantified to serve as an ecological indicator for biodiversity. However, there is a lack of guidance on what acoustic filters to apply to these indices and when. To address this gap, we collected acoustic data from study locations spanning temperate and tropical forests, agricultural grasslands and croplands, and peri-urban development. We applied filters of 80, 500, 1000, and 2000 Hz to these data when calculating the different indices. In addition, we considered the effect landscape context, road noise, season, and elevation have on seven of the most commonly used acoustic indices with different frequency filters. We found that two indices, Acoustic Diversity Index (ADI) and Acoustic Evenness Index (AEI), were most sensitive to filtering, changing significantly between an 80 and 1000 Hz filter across the different covariates. Acoustic Complexity Index (ACI), however, remained consistent with the different filters. These results suggest that when using acoustic indices, one should be cognizant of the context of the study location and the season of the study period when using ADI and AEI. ACI can be used more generously since it is not as sensitive to filtering. ARUs and acoustic indices are an effective tool for measuring biodiversity, but to ensure proper reporting and ability to compare results across studies, more guidelines on appropriate filtering of acoustic indices should be developed