608 research outputs found
Optimal Detection Strategies for an Established Invasive Forest Pest
No full textWhen it comes to invasive species management, economists have focused on the trade-off between prevention of potential invasions and management of established populations. The intermediate step-detection of established populations on the landscape so that management can commence-has only recently received attention in the economics literature. A recent paper (Mehta et al., 2007) explores how biological and economic parameters affect optimal detection spending, recognizing that greater expenditures on detection can lead to smaller and more manageable population sizes upon detection because populations are discovered early. We build upon this framework by considering the optimal spatial allocation of detection effort when it is impossible to stop the advance of the main front of an invasive species, yet it is beneficial to detect and control sub-populations of the species that erupt ahead of the front. Our approach recognizes that the duration of management of sub-populations is constrained by the amount of time remaining before the main front arrives. Locations close to the front have less time remaining than locations that are more distant. These differences imply different levels of potential benefit from early detection; in particular, shorter management horizons translate into lower benefits from intervention. The optimal intensity of detection effort varies over space along with this variation in the benefits from management.Resource /Energy Economics and Policy,
Modeling Recreational Amenities in an Urban Setting: Location, Congestion, and Substitution Effects
No full textIn this article, we introduce a recreational amenity—a greenbelt park—into a simple urban economic model. For multiple possible park placements, we solve for the associated equilibrium urban structure, including the equilibrium rent gradient, city boundary, total number of park visits, the overall utility level, and total vehicle miles traveled. We examine how these change with alternative park placement sites. We then show how two modifications of the basic model—allowing congestion at the site to affect site quality, and introducing the possibility of a substitute site at the city’s periphery—affect our conclusions about how greenbelt location influences urban structure.urban structure, greenbelt, congestion, Research and Development/Tech Change/Emerging Technologies,
A dictionary of artists of the English school: painters, sculptors, architects, engravers and ornamentists: with notices of their lives and work.
No full text"Editor's note to the second edition" signed: F. M. R. [i. e. Frances M. Redgrave]Biographical notice of the author prefixed.Mode of access: Internet
Explorative research into current practice of experimentation in discrete-event simulation
No full textPush from the author [Review the book "The Boy with an 'R' in His Hand" by James Reaney]
No full textMisogyny, misandry, and misanthropy
No full textThese essays, originally comprising an issue of Representations , explore the relation between gender, eroticism, and violence through close analysis of a range of both high and popular cultural forms, from R. Howard Bloch on medieval theology to Carol Clover on contemporary slasher films. Does misogyny differ from misandry? Can author intention be separated from social context? Do good women counterbalance or reenforce the misogyny of negative examples? Is an obsession with women itself misogynistic? These questions are approached from various angles by Joel Fineman, Charles Bernheimer, Jacqueline Lichtenstein, Frances Ferguson, Naomi Schor and Gillian Brown. In sum, the authors detail not only the ways in which gender is represented, but also the changes to which representation subjects questions of sexual difference
Impacts of Hurricanes Frances and Jeanne on Two Nourished Beaches along the Southeast Florida Coast
No full textSite inspections and beacli profile surveys of nourislied beaclies in the city of Boca Raton, and Town of Palm Beach, Florida show that the nourished beaches protected the shore from hurricane impacts in 2004. Striking the southeast coast of Florida within 20 days of each other. Hurricane Frances (Sept. 5, 2004) and Hurricane Jeanne (Sept. 25, 2004) had hurricane-force winds extending more than 120 miles from the center. The eye of Frances made landfall as a Category 2 storm and Jeanne made landfall as a Category 3 storm on the Saffir-Simpson Hurricane Intensity Scale, Above-average waves and surge affected the entire Florida east coast. Although these beaches were on the return or weak side (southwest quadrant with winds from the southwest as the eye traversed the shore) of both hurricanes, hurricane-uiduced waves affected the coast at least three days prior to landfall. Field inspection of the study sites after the passage of both hunicanes showed significant beach erosion and loss of berm elevation. Damage to infrastructure landward of the nourished beaches was minimal while non-nourished beaches located a few miles to the north and south of the renourished beaches sustained some damage. Beach profile surveys indicated that, as a general trend, beach and inner surfzone erosion was accompanied by the formation of well-developed storm bars seaward of pre-storm bars. Beach morphological responses at the town of Palm Beach were a function of offshore geomorphology of the reef system and the presence of high relief rock outcrops located within the surf zone. Sand that eroded from the renourished beach was deposited seaward of rock outcrops in the surf zone but the rock outcrops had no measurable sediment build up. Causes of the magmtude and trends of beach performance are hypothesized in an effort to explain the observed beach behavior.Hydraulic EngineeringCivil Engineering and Geoscience
Frances Ellen Colenso, 1849-1887 : her life and times in relation to the Victorian stereotype of the middle class English woman
No full textIncludes bibliographical referencesThe stereotype of the Victorian middle class woman, which generally characterised her as a passive, ornamental, helpless and dependent creature, has been one of the most popular caricatures of the nineteenth century. Recent research into this hitherto largely ignored social class has begun to re-adjust this image. The stereotyped distressed gentlewoman who emigrated to Australia and New Zealand for instance has recently been critically examined, but so far the female emigrant and settler in colonial South Africa has been ignored. It is only since the early 1970s that academic research into feminism began to appear. The influence of the women's liberation movement and of the increasing interest in social history, while stimulating research into Victorian women in England and her colonies, has only penetrated historical research within South Africa in the last decade
Examining beginner computer programmers' procedural logic using the escape room model
No full textThis work was produced while the author was an undergraduate student in the Summer Research Institute of the Ronald E. McNair Post Baccalaureate Degree Achievement Program at Rutgers University
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