Clean Air Council v. Pruitt

The United States Court of Appeals for the District of Columbia granted a motion for summary vacatur against the Environmental Protection Agency after environmental groups challenged the agency’s reconsideration of the Obama-era methane rule under the Clean Air Act. The court held that the EPA unlawfully issued a stay after it reconsidered the rule without proper authorization. The court vacated the EPA’s stay, one example of the Trump Administration unsuccessfully repealing Obama-era rulemaking

Standing Rock Sioux Tribe v. U.S. Army Corps of Engineers

The United States District Court for the District of Columbia partially granted the Standing Rock Sioux Tribe’s motion for partial summary judgment against the Army Corps of Engineers after the Tribe alleged the violation of required environmental analysis. While the court held that the Army Corps of Engineers mostly complied with the requirements of the National Environmental Policy Act, the court found deficiencies within its environmental analysis; the remedy is forthcoming

California v. U.S. Bureau of Land Management

The United States District Court for the Northern District of California granted a preliminary injunction against the Bureau of Land Management from implementing the Suspension Rule, which would delay the requirements of the Waste Prevention, Production Subject to Royalties, and Resource Conservation Rule. Additionally, the court denied the BLM and intervening third parties’ motion to transfer venue to the District of Wyoming. The court held the plaintiffs were entitled to a preliminary injunction because the BLM did not provide a reasoned analysis for the Suspension Rule. This failure to provide meaningful notice and comment was an arbitrary and capricious abuse of discretion. California v. U.S. Bureau of Land Management provides yet another example of the Trump Administration’s attempts to circumvent Obama-era regulations by expediting rulemaking process in violation of the Administrative Procedures Act

Autonomous characters in virtual environments: The technologies involved in artificial life and their affects on perceived intelligence and playability of computer games

Computer games are viewed by academics as un֊grounded hack and patch experiments. "The industry lacks the formalism and requirement for a "perfect" solution often necessary in the academic world " [Woob]. Academic Artifical Intelligence (AI) is often viewed as un-implementable and narrow minded by the majority of ทon-AI programmer. "Historically, AI tended to be focused, containing detailed problems and domain-specific techniques. This focus makes for easier study - or engineering - of particular solutions. " [СһаОЗ .By implementing several well known AI techniques into the same gaming environment and judging users reactions this project aims to make links between the academic nature of AI, as well as investigate the nature of practical implementation in a gaming environment. An online Java implemented version of the 1970'ร classic Space Invaders has been developed and tested, with the Aliens being controlled by 6 different approaches to modelling AI functions. In total information from 334 individuals games was recorded. Different types of games AI can create highly varied gaming experience as highlighted by the range of values and high standard deviation values seen in the results. The link between complex behaviour, complex control systems and perceived intelligence was not supported. A positive correlation identified between how fun the users found the game and how intelligent they perceived the Aliens to be, would seem to be logical. As games get visually more and more impressive, the need for intelligent characters cannot be denied because it is one of the few way in which games can set themselves apart from the competition. Conclusions identified that computer games must remain focussed on their end- goal, that of producing a fun game. Whilst complex and clever AI can help to achieve it, the AI itself can never overshadow the end result

Temporal Variations in Spring Water Chemistry and Comparison of Variable Paleozoic Aquifer Discharges in the Ridge and Valley Province of Northwestern Georgia

The fluctuations in solute concentrations from eight springs in the Ridge and Valley Province in northwestern Georgia were used to determine flow types and to measure each aquifer’s ability to remove contamination. The target springs are located along a northeast trending line in the Ridge and Valley Province of northwest Georgia. This study determined and interpreted the fluctuations in chemistry of each of the sampled spring’s water based upon temporal variations of precipitation in the area and variations in the chemistries measured at each weekly sampling event. Analysis determined that carbonate springs that showed characteristics of diffuse flow, including stable conductance during variable rain events and greater than zero saturation indices increase the potential for the aquifer to filter potential contaminants before the spring discharge. This study attempts to show that by identifying pre-filtered drinking water sources quickly is possible, through field and laboratory analysis

California v. U.S. Bureau of Land Management

The United States District Court for the Northern District of California granted a preliminary injunction against the Bureau of Land Management from implementing the Suspension Rule, which would delay the requirements of the Waste Prevention, Production Subject to Royalties, and Resource Conservation Rule. Additionally, the court denied the BLM and intervening third parties’ motion to transfer venue to the District of Wyoming. The court held the plaintiffs were entitled to a preliminary injunction because the BLM did not provide a reasoned analysis for the Suspension Rule. This failure to provide meaningful notice and comment was an arbitrary and capricious abuse of discretion. California v. U.S. Bureau of Land Management provides yet another example of the Trump Administration’s attempts to circumvent Obama-era regulations by expediting rulemaking process in violation of the Administrative Procedures Act

Assessment of CFD Hypersonic Turbulent Heating Rates for Space Shuttle Orbiter

Turbulent CFD codes are assessed for the prediction of convective heat transfer rates at turbulent, hypersonic conditions. Algebraic turbulence models are used within the DPLR and LAURA CFD codes. The benchmark heat transfer rates are derived from thermocouple measurements of the Space Shuttle orbiter Discovery windward tiles during the STS-119 and STS-128 entries. The thermocouples were located underneath the reaction-cured glass coating on the thermal protection tiles. Boundary layer transition flight experiments conducted during both of those entries promoted turbulent flow at unusually high Mach numbers, with the present analysis considering Mach 10{15. Similar prior comparisons of CFD predictions directly to the flight temperature measurements were unsatisfactory, showing diverging trends between prediction and measurement for Mach numbers greater than 11. In the prior work, surface temperatures and convective heat transfer rates had been assumed to be in radiative equilibrium. The present work employs a one-dimensional time-accurate conduction analysis to relate measured temperatures to surface heat transfer rates, removing heat soak lag from the flight data, in order to better assess the predictive accuracy of the numerical models. The turbulent CFD shows good agreement for turbulent fuselage flow up to Mach 13. But on the wing in the wake of the boundary layer trip, the inclusion of tile conduction effects does not explain the prior observed discrepancy in trends between simulation and experiment; the flight heat transfer measurements are roughly constant over Mach 11-15, versus an increasing trend with Mach number from the CFD

Infrared Period-Luminosity Relations of Evolved Variable Stars in the Large Magellanic Cloud

We combine variability information from the MAssive Compact Halo Objects (MACHO) survey of the Large Magellanic Cloud (LMC) with infrared photometry from the Spitzer Space Telescope Surveying the Agents of a Galaxy's Evolution (SAGE) survey to create a dataset of ~30 000 variable red sources. We photometrically classify these sources as being on the first ascent of the Red Giant Branch (RGB), or as being in one of three stages along the Asymptotic Giant Branch (AGB): oxygen-rich, carbon-rich, or highly reddened with indeterminate chemistry ("extreme" AGB candidates). We present linear period-luminosity relationships for these sources using 8 separate infrared bands (J, H, K, 3.6, 4.5, 5.8, 8.0, and 24 micron) as proxies for the luminosity. We find that the wavelength dependence of the slope of the period-luminosity relationship is different for different photometrically determined classes of AGB stars. Stars photometrically classified as O-rich show the least variation of slope with wavelength, while dust enshrouded extreme AGB stars show a pronounced trend toward steeper slopes with increasing wavelength. We find that O-rich AGB stars pulsating in the fundamental mode obey a period-magnitude relation with a slope of -3.41 +/- 0.04 when magnitude is measured in the 3.6 micron band, in contrast to C-rich AGB stars, which obey a relation of slope -3.77 +/- 0.05