On the interiors of production sets in infinite dimensional spaces

Includes bibliographical references (p. 18)

Nuclear inelastic scattering spectroscopy of tris(acetylacetonate)iron(III); A vibrational probe via the iron atom

We report application of nuclear inelastic scattering (NIS) spectroscopy to the compound tris(acetylacetonate)iron(III), [Fe(III)(acac)3] enriched in 57Fe. Experimental results are compared with the simulated spectrum based on the normal mode analysis of the isolated [57Fe(III)(acac)3] molecule using DFT calculations. Good agreement between the peak positions and intensities of the simulated and experimental spectra enables complete and reliable assignment of the Fe-selective vibrational modes. It is concluded that in the solid state E modes are enhanced by coupling with the lattice modes. Additionally, infrared and Raman spectra of [Fe(III)(acac)3] are calculated from DFT and compared with experiment thus demonstrating the complementarity of these three vibrational spectroscopic techniques

Lessons learned from stock collapse and recovery of North Sea herring: a review

The collapse and recovery of North Sea herring in the latter half of the 20th century had both ecological and economic consequences. We review the effect of the collapse and investigate whether the increased understanding about the biology, ecology, and stock dynamics gained in the past three decades can aid management to prevent further collapses and improve projections of recovery. Recruitment adds the most uncertainty to estimates of future yield and the potential to reach biomass reference points within a specified time-frame. Stock–recruitment relationships must be viewed as being fluid and dependent on ecosystem change. Likewise, predation mortality changes over time. Management aimed at maximum sustainable yield (MSY) fishing mortality targets implies interannual variation in TACs, and variability in supply is therefore unavoidable. Harvest control rules, when adhered to, aid management greatly. We advocate that well-founded science can substantially contribute to management through improved confidence and increased transparency. At present, we cannot predict the effects of collapse or recovery of a single stock on the ecosystem as a whole. Moreover, as managers try to reconcile commitments to single-species MSY targets with the ecosystem-based approach, they must consider the appropriate management objectives for the North Sea ecosystem as a whole