The United States has been collecting supplemental economic information in addition to biological catch and effort data from saltwater recreational anglers. This supplemental information was collected to enable the estimation of travel cost models of recreation demand. This paper will discuss in detail the data that is available and the...
The boundary between ice and basalt on Earth is an analog for some near-surface environments of Mars. We investigated neutrophilic iron-oxidizing microorganisms from the basalt-ice interface in a lava tube from the Oregon Cascades with perennial ice. One of the isolates (Pseudomonas sp. HerB) can use ferrous iron Fe(II) from...
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-Ice Interface
in a Lava-Tube Cave, a Mars Analog Environment
Radu Popa,1 Amy R. Smith,1 Rodica Popa,1
The boundary between ice and basalt on Earth is an analog for some near-surface environments of Mars. We investigated neutrophilic iron-oxidizing microorganisms from the basalt-ice interface in a lava tube from the Oregon Cascades with perennial ice. One of the isolates (Pseudomonas sp. HerB) can use ferrous iron Fe(II) from...
Full Text:
Popa, Radu
Portland State University, Biology
Smith, Amy
Portland State University, Biology
Popa
This article summarizes the geotechnical effects of the 25 April 2015 M 7.8 Gorkha, Nepal, earthquake and aftershocks, as documented by a reconnaissance team that undertook a broad engineering and scientific assessment of the damage and collected perishable data for future analysis. Brief descriptions are provided of ground shaking, surface...
Using a two-stage harvesting game, I model the political and economic incentives to overfish in a regulated, restricted access common property fishery with income supplements. As variable fishing effort is regulated and effort caps appear to be binding, I argue that social choice of political lobbying effort becomes the principal...
The purpose of this study was to document the development of pre-service teachers' Technology Specific Pedagogy as they learned to teach mathematics with technology during their initial licensure program. The study investigated the pre-service teachers' learning using both a social and a psychological perspective of teacher learning. Two research questions...
The genetic control of changes in unselected traits of
Wrolstad Medium White turkeys divergently selected for
semen ejaculate volumes (SEV) for 16 generations (G) was
studied. Genetic parameters were estimated in G 10 to 14
for embryonic mortality (EM), the incidence of pipped eggs,
and for total plasma cholesterol (PC)...
Animals aggregate and interact in nonuniform and nonrandom patterns, which lead to group level characteristics that have important evolutionary and ecological consequences. Network analysis provides a useful conceptual framework for linking animal interactions at all scales from dyads to communities, to populations and ecosystems. Despite exciting theoretical and applied advances...
Indirect benefits have a long history in the literature of benefit-cost (B-C) analysis. A commonmeasurement tool for indirect benefits is the Leontief or Input Output Model (I-O), and this paper discussesindirect benefits as if they are identical to I-O analysis. The B-C literature disparages I-O for assessing theeconomic efficiency of...