Triggering an eruptive flare by emerging flux in a solar active-region complex

A flare and fast coronal mass ejection originated between solar active regions NOAA 11514 and 11515 on July 1, 2012 in response to flux emergence in front of the leading sunspot of the trailing region 11515. Analyzing the evolution of the photospheric magnetic flux and the coronal structure, we find that the flux emergence triggered the eruption by interaction with overlying flux in a non-standard way. The new flux neither had the opposite orientation nor a location near the polarity inversion line, which are favorable for strong reconnection with the arcade flux under which it emerged. Moreover, its flux content remained significantly smaller than that of the arcade (approximately 40 %). However, a loop system rooted in the trailing active region ran in part under the arcade between the active regions, passing over the site of flux emergence. The reconnection with the emerging flux, leading to a series of jet emissions into the loop system, caused a strong but confined rise of the loop system. This lifted the arcade between the two active regions, weakening its downward tension force and thus destabilizing the considerably sheared flux under the arcade. The complex event was also associated with supporting precursor activity in an enhanced network near the active regions, acting on the large-scale overlying flux, and with two simultaneous confined flares within the active regions.Comment: Accepted for publication in Topical Issue of Solar Physics: Solar and Stellar Flares. 25 pages, 12 figure

Immunoassays (ELISA) of urokinase-type plasminogen activator (uPA): report of an EORTC/BIOMED-1 workshop

Contains fulltext : 24075___.PDF (publisher's version ) (Open Access

Economic Development Prospects of Forest-Dependent Communities: Analyzing Trade-offs Using a Compromise-Fuzzy Programming Framework

Many aboriginal communities look to forest resources for short- and long-term employment, adequate timber for mills, an even flow of wood fiber for community stability, and financial returns for economic diversification. We address these conflicting objectives using multiple-objective programming. We show how compromise programming can be used to set bounds on fuzzy membership functions, and illustrate the difference between crisp and fuzzy weighting of objectives. Economic development outcomes obtained using compromise and fuzzy programming greatly improve upon those associated with the even-flow of timber rule of thumb. Yet, timber extraction is an inadequate driver of economic development in rural communities. Copyright 2008, Oxford University Press.