An Analysis of Horizontal Flow Treatment Well Applicability for the Treatment of Chlorinated Solvent Contaminated Groundwater at United States Forces Korea Installations

Past research has shown that there is a rising public concern with environmental issues in the Republic of Korea (ROK). As Korean government and public interest in the environment grow, there is likely to be increased pressure to remediate environmental contamination at United States Department of Defense (DoD) installations in Korea. Impacting DoD\u27s ability to remediate contaminated sites overseas is the fact that limited environmental funds must compete with high priority mission requirements. Thus, particularly at overseas bases, there is an urgent need for inexpensive and effective groundwater remediation technologies. Horizontal Flow Treatment Well (HFTW) systems have been demonstrated in the U.S. to be an effective technology for managing groundwater contamination. However, the problem of finding a technology that is appropriate for use in Korea is particularly challenging due to the fractured aquifer systems that are ubiquitous throughout the Korean peninsula. The model analyses conducted in this study found that HFTWs have the potential to be a cost effective alternative to conventional technologies for contaminant management in the fractured media found in Korea. This study focused on the containment of groundwater contaminated with chlorinated solvents in the fractured rock aquifers that are commonly encountered at DoD installations in the ROK. Horizontal Flow Treatment Wells were analyzed as a potentially cheaper, safer, and more effective technology for the containment of chlorinated solvent contaminated groundwater. In this study, an HFTW numerical model that was developed for porous media was applied to the fractured systems encountered in the ROK. It was concluded that at the scale of interest, use of a porous media model was appropriate. Both hydrogeologic and design parameters were varied to determine their effects on the technology performance

Lynx And Coyote Diet And Habitat Relationships During A Low Hare Population On The Kenai Peninsula, Alaska

Thesis (M.S.) University of Alaska Fairbanks, 1995Food habits and habitat use of lynx and coyote were compared 1987-1991 on the Kenai Peninsula, Alaska when the snowshoe hare population was low ($<$0.5 hares/ha). During snow seasons, lynx fed primarily on hares (64% total items), whereas coyotes relied heavily on moose carcasses (42% total items). Diet overlap was 42% and hare use overlap was 16%. Habitat use overlap was 92%, but coyotes used roads more than lynx. Both carnivores selected 1947 burn and avoided 1969 burn and large expanses of mature forest. I conclude that there was exploitation competition for food between these predators, because both used the same habitats and hares, a major food, were scarce. The coyote, however, may be using resources that were previously used by red fox, which have been reduced to low levels. Lynx displayed little fear of humans and were vulnerable to shooting incidental to hunting and depredation events. <p

The Impact of Advanced Biofuels on Aviation Emissions and Operations in the U.S.

We analyze the economic and emissions impacts on U.S. commercial aviation of the Federal Aviation Administration’s renewable jet fuel goal when met using advanced fermentation (AF) fuel from perennial grasses. These fuels have recently been certified for use in aircraft and could potentially provide greater environmental benefits than aviation biofuels approved previously. Due to uncertainties in the commercialization of AF technologies, we consider a range of assumptions concerning capital costs, energy conversion efficiencies and product slates. In 2030, estimates of the implicit subsidy required to induce consumption of AF jet fuel range from $0.45 to$20.85 per gallon. These correspond to a reference jet fuel price of $3.23 per gallon and AF jet fuel costs ranging from 4.01 to$24.41 per gallon. In all cases, as renewable jet fuel represents around 1.4% of total fuel consumed by commercial aviation, the goal has a small impact on aviation operations and emissions relative to a case without the renewable jet fuel target, and emissions continue to grow relative to those in 2005. Costs per metric ton of carbon dioxide equivalent abated by using biofuels range from $42 to$652.This work is funded by the U.S. Federal Aviation Administration (FAA) and Defense Logistics Agency Energy (DLA Energy) through Project 47 of the Partnership for Air Transportation Noise and Emissions Reduction (PARTNER). The Joint Program on the Science and Policy of Global Change is funded by the U.S. Department of Energy and a consortium of government and industrial sponsors (for the complete list see http://globalchange.mit.edu/sponsors/all)

Dairy Cow Performance on Pasture-Based Feeding Systems and in Confinement

Interest in grazing systems is growing among farmers in the USA as a means of reducing feed costs for lactating dairy cows. An experiment was conducted near Gainesville, FL to compare milk production and composition and milk income minus feed costs from two pasture-based systems with those of a conventional confinement housing system over a 276-d period. System 1 was based on a mixture of rye (Secale cereale L.), annual ryegrass (Lolium multiflorum Lam.), crimson clover (Trifolium incarnatum L.), and red clover (Trifolium pratense L.) during the winter-spring seasons and pearl millet (Pennisetum glaucum [L.] R.Br.) during the summerfall seasons. System 2 utilized a rye-ryegrass mixture (no clover) during winter-spring and bermudagrass (Cynodon spp.) during summer-fall. Concurrently, cows managed in free-stall housing at the university farm comprised System 3. Cows in confined housing produced 20% more milk than cows on pasture, but feed cost of grazing cows was about one half that of confined cows. Milk income minus feed costs was $5.56,$5.84, and $5.34 cow-1 d-1 for Systems 1, 2, and 3, respectively

Developing LGBT+ Inclusive Supporter Groups in the Big Bash League

Sport is an integral part of both Australian culture and identity. However, the lesbian, gay, bisexual and transgender communities (LGBT+) face extra barriers and challenges to engagement and participation in sport. This study, formed through a partnership between Western Sydney University and Cricket Victoria, aimed to better understand how LGBT+ supporter/ coterie groups could be initiated and supported in the Big Bash League. Twenty-Four key stakeholders and informants drawn from Australian Football League (AFL) LGBT+ supporter groups, AFL administrators, cricket administrators, and LGBT+ cricket fans were interviewed to collect comprehensive data on the requirements for successful LGBT+ supporter group formation in cricket and the Big Bash League. Our results reveal a strong desire to include more LGBT+ communities in cricket, with the Big Bash League identified as an ideal opportunity due to its family-oriented nature. However, it was felt by participants that there was a lack of understanding and education of LGBT+-related issues within the cricket community. The experiences of those involved in AFL support groups have been overwhelmingly positive and provide a compelling case for the introduction of LGBT+ supporter groups in cricket, from both a social inclusion and financial management perspective. We conclude that the introduction of LGBT+ supporter groups in cricket has the potential to impact positively the lives of LGBT+ communities, providing a platform for them to engage with sport in a meaningful and positive way. Three key messages were identified for those wishing to set up LGBT+ supporter groups: 1. Groups should be developed from the bottom up, being driven by LGBT+ fans and members rather than purely from the organisation. A partnership approach between Cricket Victoria/Big Bash League clubs and local LGBT+ communities also provides an avenue to facilitate training and education on LGBT+-related issues for staff and players. 2. Institutional support is crucial for such an initiative to succeed; 3. Clear policies are needed to support supporter groups and to address any negative responses. This policy should also address behaviour by players and staff to ensure that the institutional commitment to inclusion is not undermined