Congressional Reaction to TVA v. Hill: The 1978 Amendments to the Endangered Species Act

The first comprehensive legislation for the protection of endangered species was the Endangered Species Conservation Act of 1966. It provided for a program for the conservation, protection, restoration, and propagation of selected species of native fish and wildlife ... that are threatened with extinction. \u27 In 1969, Congress expanded the Act in several important respects; however, it became apparent, as stated in 1972 by President Nixon, that the existing legislation simply [did] not provide the kind of management tools needed to act early enough to save a vanishing species. \u2

Civil Practice and Procedure

This article surveys recent significant developments in Virginia civil practice and procedure. Specifically, the article discusses opinions of the Supreme Court of Virginia from June 2010through June 2011 addressing civil procedure topics; significant amendments to the Rules of the Supreme Court of Virginia concerning procedural issues during the same period; and legislation enacted by the Virginia General Assembly during its 2011 session that relates to civil practice

Civil Practice and Procedure

This article surveys recent significant developments in Virginia civil practice and procedure. Specifically, the article discusses opinions of the Supreme Court of Virginia from June 2009 through April 2010 addressing civil procedure; significant amendments to the Rules of the Supreme Court of Virginia made during the same period; and legislation enacted by the Virginia GeneralAssembly during its 2010 session relating to civil practice

Civil Practice and Procedure

This article will summarize recent developments of interest to practitioners handling civil cases in the courts of the Commonwealth of Virginia. Specifically included are relevant decisions of the Supreme Court of Virginia dating from opinions announced on June 10, 2004 to those announced on April 22, 2005; changes to the Rules of the Supreme Court of Virginia announced during the same time period; and legislation enacted by the Virginia General Assembly at its 2005 Session, effective July 1, 2005

Improved profile fitting and quantification of uncertainty in experimental measurements of impurity transport coefficients using Gaussian process regression

The need to fit smooth temperature and density profiles to discrete observations is ubiquitous in plasma physics, but the prevailing techniques for this have many shortcomings that cast doubt on the statistical validity of the results. This issue is amplified in the context of validation of gyrokinetic transport models (Holland et al 2009 Phys. Plasmas 16 052301), where the strong sensitivity of the code outputs to input gradients means that inadequacies in the profile fitting technique can easily lead to an incorrect assessment of the degree of agreement with experimental measurements. In order to rectify the shortcomings of standard approaches to profile fitting, we have applied Gaussian process regression (GPR), a powerful non-parametric regression technique, to analyse an Alcator C-Mod L-mode discharge used for past gyrokinetic validation work (Howard et al 2012 Nucl. Fusion 52 063002). We show that the GPR techniques can reproduce the previous results while delivering more statistically rigorous fits and uncertainty estimates for both the value and the gradient of plasma profiles with an improved level of automation. We also discuss how the use of GPR can allow for dramatic increases in the rate of convergence of uncertainty propagation for any code that takes experimental profiles as inputs. The new GPR techniques for profile fitting and uncertainty propagation are quite useful and general, and we describe the steps to implementation in detail in this paper. These techniques have the potential to substantially improve the quality of uncertainty estimates on profile fits and the rate of convergence of uncertainty propagation, making them of great interest for wider use in fusion experiments and modelling efforts.United States. Dept. of Energy. Office of Fusion Energy Sciences (Award DE-FC02-99ER54512)United States. Dept. of Energy. Office of Science (Contract DE-AC05-06OR23177)United States. Dept. of Energy. Office of Advanced Scientific Computing Research (Award DE-SC0007099

Impact of Experimental Hookworm Infection on the Human Gut Microbiota

The interactions between gastrointestinal parasitic helminths and commensal bacteria are likely to play a pivotal role in the establishment of host-parasite cross-talk, ultimately shaping the development of the intestinal immune system. However, little information is available on the impact of infections by gastrointestinal helminths on the bacterial communities inhabiting the human gut. We used 16S rRNA gene amplification and pyrosequencing to characterize, for the first time to our knowledge, the differences in composition and relative abundance of fecal microbial communities in human subjects prior to and following experimental infection with the blood-feeding intestinal hookworm, Necator americanus. Our data show that, although hookworm infection leads to a minor increase in microbial species richness, no detectable effect is observed on community structure, diversity or relative abundance of individual bacterial species

Evaluating phosphorus release by phytase in diets fed to growing pigs that are not deficient in phosphorus

Microbial phytase is widely used to enhance digestibility of phytate-P. By tradition, diets with P content well below requirement are used to quantify phytate-P release by phytase, but P-adequate diets may be more physiologically relevant. The objective of this study was to investigate the effects of phytase on P digestion and metabolism and develop a P release curve for phytase in Padequate diets (above requirement according to NRC, 2012), and to compare these effects in a Pdeficient diet. Three replicates of 24 barrows each (BW = 23.0 ± 1.8 kg) were randomly assigned to 1 of 8 dietary treatments, housed in individual pens for 21 d, then moved to metabolism crates for 5 d urine and fecal collections. A basal corn-soybean meal diet (P-adequate, A) was formulated at 0.36% standardized total tract digestible (STTD) P and total Ca:STTD P of 1.83. Phytase was added to A at 200 (A200), 400 (A400), 600 (A600), and 800 (A800) phytase units (FTU)/kg. A positive control diet (PC) was formulated using monocalcium phosphate (MCP) to increase STTD P by 0.16% to 0.52%, the expected STTD P release of 800 FTU/kg. A P-deficient diet (D) was formulated by reducing MCP to achieve 0.21% STTD P, and 200 FTU phytase/kg was added to D for D200. Pig was the experimental unit, and replicate and dietary treatment were fixed effects. Orthogonal polynomial contrasts were used to test linear and quadratic effects of phytase within A, A200, A400, A600, and A800. Phytase increased percent apparent total tract digestibility (ATTD) and STTD of P (quadratic P \u3c 0.001), and quantity of absorbed P (linear P \u3c 0.001; quadratic P = 0.069). Urinary P increased linearly with phytase (P \u3c 0.001) and retained P also increased (linear P = 0.001, quadratic P = 0.094). Phytate-P release was estimated to be 0.049, 0.080, 0.093, and 0.09% STTD P for 200, 400, 600, and 800 FTU/kg, respectively. It appears that the effect of phytase may be lower in P-adequate diets as compared to P-deficient diets, given that there was a 12% improvement for A200 vs A, and a 28% improvement in STTD P for D200 vs D. In conclusion, phytase improved P digestibility and retention in P-adequate diets, and P digestibility was used to estimate the quantity of P released by phytase. Further research investigating P release by phytase in P-adequate diets, rather than Pdeficient diets, may be preferable

A digital solution to improve communication efficiency between environmental sensors and webservers (the osd2ERDDAP API).

The purpose of this report is to document the communications protocol and test system osd2ERDDAP developed as part of the Enhancing Climate Observations, Models and Data (ECO MAD) project. The approach allows deployed sensors to telemeter small quantities of arbitrary tabular Ocean Science Data (osd) directly to an ERDDAP server via the Internet in a way that is more efficient for the sensor than using ERDDAP’s existing HTML Forms interface. ERDDAP is a data server that provides a simple and consistent way to download subsets of scientific datasets in common file formats and make graphs and maps. It is the online server used by the British Oceanographic Data Centre (BODC) and National Oceanic and Atmospheric Administration (NOAA) to publicly share environmental data in a format that meets international data management standards. Future use of this API with a range of ocean sensors and ERDDAP will increase the efficiency of data streaming. In turn this reduces power (and associated maintenance) requirements that is vital to deliver low-cost long-term monitoring networks, which support climate research and the management of climate impacts

The physics mechanisms of the weakly coherent mode in the Alcator C-Mod Tokamak

The weakly coherent mode (WCM) in I-mode has been studied by a six-field two-fluid model based on the Braginskii equations under the BOUT++ framework for the first time. The calculations indicate that a tokamak pedestal exhibiting a WCM is linearly unstable to drift Alfven wave (DAW) instabilities and the resistive ballooning mode. The nonlinear simulation shows promising agreement with the experimental measurements of the WCM. The shape of the density spectral and location of the spectral peak of the dominant toroidal number mode n = 20 agrees with the experimental data from reflectometry. The simulated mode propagates in electron diamagnetic direction is consistent with the results from the magnetic probes in the laboratory frame, a large ratio of particle to heat diffusivity is consistent with the distinctive experimental feature of I-mode, and the value of the simulated χeat the edge is in the range of experimental errors of χefffrom the experiment. The prediction of the WCM shows that free energy is mainly provided by the electron pressure gradient, which gives guidance for pursuing future I-mode studies