Decarbonizing the Downturn: Addressing Climate Change in an Age of Stagnation

Meeting the Paris climate goals requires the global economy’s urgent decarbonization. States and intergovernmental bodies insist that this should be pursued via a tremendous spike in private investment in renewable power – encouraged and coordinated by states. However, this renewable investment boom will have to swim against the current of the stagnation of the world economy since the 1970s, characterized by weak rates of investment and growth. Undertaking decarbonization in this context presents unique political economy dilemmas. Firstly, although slow growth helps to reduce carbon emissions by lowering energy use, it simultaneously impedes energy efficiency gains. Secondly, the stagnant state of global industry militates against its adoption of expensive decarbonized industrial processes. Thirdly, while most renewable power sources have failed to attract sufficient investment, those that have expanded rapidly – particularly solar photovoltaic – have tended to exhaust their growth potential due to falling prices and profitability. Finally, economic stagnation has destabilized political institutions, exerting pressures on governments to stimulate growth regardless of the environmental implications. States must navigate these intractable dilemmas as they strategize to decarbonize the downturn

College-level ELLs in two English composition courses: the transition from ESL to the mainstream

This study will analyze patterns\u27 in ESL student academic behavior particularly related to classroom learning during their transition between English 101 and English 201. The student academic behaviors are particularly linguistic, based on the five langauge skills reading, writing, speaking, listening, grammar. These behaviors will be analyzed separately through participant observation in class, and through two surveys given to participants in the study. Data will be analyzed for patterns in student academic behavior in each classroom context. Then, patterns in student academic behavior will be compared between the classroom contexts --Leaf iv

Is there overutilisation of cataract surgery in England?

<b>Objectives:</b> Following a 3.7-fold increase in the rate of cataract surgery in the UK between 1989 and 2004, concern has been raised as to whether this has been accompanied by an excessive decline in the threshold such that some operations are inappropriate. The objective was to measure the impact of surgery on a representative sample of patients so as to determine whether or not overutilisation of surgery is occurring. <b>Design:</b> Prospective cohort assessed before and 3 months after surgery. <b>Setting:</b> Ten providers (four NHS hospitals, three NHS treatment centres, three independent sector treatment centres) from across England. <b>Participants:</b> 861 patients undergoing first eye (569) or second eye (292) cataract surgery provided preoperative data of whom 745 (87%) completed postoperative questionnaires. <b>Main outcome measures:</b> Patient-reported visual function (VF-14); general health status and quality of life (EQ5D); postoperative complications; overall view of the operation and its impact. <b>Results:</b> Overall, visual function improved (mean VF-14 score increased from 83.2 (SD 17.3) to 93.7 (SD 13.2)). Self-reported general health status deteriorated (20.3% fair or poor before surgery compared with 25% afterwards) which was reflected in the mean EQ5D score (0.82 vs 0.79; p = 0.003). At least one complication was reported by 66 (8.9%) patients, though this probably overestimated the true incidence. If the appropriateness of surgery is based on an increase in VF-14 score of 5.5 (that corresponds to patients’ reporting being "a little better"), 30% of operations would be deemed inappropriate. If an increase of 12.2 (patients’ reports of being "much better") is adopted, the proportion inappropriate is 49%. Using a different approach to determining a minimally important difference, the proportion inappropriate would be closer to 20%. Although visual function (VF-14) scores were unchanged or deteriorated in 25% of patients, 93.1% rated the results of the operation as "good," "very good" or "excellent," and 93.5% felt their eye problem was "better." This partly reflects inadequacies in the validity of the VF-14. <b>Conclusions:</b> Improvement in the provision of cataract surgery has been accompanied by a reduction in the visual function threshold. However, methodological difficulties in measuring the impact of cataract surgery on visual function and quality of life mean it is impossible to determine whether or not overutilisation of cataract surgery is occurring. N Black1, J Browne1, J van der Meulen1, L Jamieson2, L Copley2 and J Lewsey

Survival after liver transplantation in the United Kingdom and Ireland compared with the United States

<b>Background and Aim</b>: Surgical mortality in the US is widely perceived to be superior to that in the UK. However, previous comparisons of surgical outcome in the two countries have often failed to take sufficient account of case-mix or examine long-term outcome. The standardised nature of liver transplantation practice makes it uniquely placed for undertaking reliable international comparisons of surgical outcome. The objective of this study is to undertake a risk-adjusted disease-specific comparison of both short- and long-term survival of liver transplant recipients in the UK and Ireland with that in the US. <b>Design, setting and participants</b>: Multi-centre cohort study using two high quality national databases including all adults who underwent a first single organ liver transplant in the UK and Ireland (n=5,925) and the US (n=41,866) between March 1994 and March 2005. <b>Main outcome measures</b>: Post-transplant mortality during the first 90 days, 90 days-1 year and beyond the first year, adjusted for donor and recipient characteristics. <b>Results</b>: Risk-adjusted mortality in the UK and Ireland was generally higher than in the US during the first 90 days (hazard ratio 1.17 95%CI 1.07-1.29), both for patients transplanted for acute liver failure (hazard ratio 1.27 95%CI 1.01-1.60) as well as those transplanted for chronic liver disease (hazard ratio 1.18 95% CI 1.07- 1.31). Between 90 days and 1 year post-transplantation, no statistically significant differences in overall risk- adjusted mortality were noted between the two cohorts. Survivors of the first post-transplant year in the UK and Ireland had lower overall risk-adjusted mortality than those transplanted in the US (hazard ratio 0.88 95% CI 0.81- 0.96). This difference was observed among patients transplanted for chronic liver disease (hazard ratio 0.88 95%CI 0.81-0.96) but not those transplanted for acute liver failure (hazard ratio 1.02 95%CI 0.70- 1.50). <b>Conclusions</b>: Whilst risk adjusted mortality is higher in the UK and Ireland during the first 90 days following liver transplantation, it is higher in the US among those liver transplant recipients who survived the first post- transplant year. Our results are consistent with the notion that the US has superior acute peri-operative care whereas the UK appears to provide better quality chronic care following liver transplantation surgery

WHOI silhouette DIGITIZER version 1.0 user’s guide

WHOI Silhouette DIGITIZER is a MATLAB-based computer program for measuring the lengths of marine organisms in the macrozooplankton size range. DIGITIZER displays a scanned photographic image of a seawater slurry containing large numbers of marine organisms, upon which is superimposed a reference grid. DIGITIZER then allows you to measure the organisms' lengths using the cursor on the computer screen. DIGITIZER automatically calculates each organism’s biomass and generates spreadsheet compatible output listings of basic statistics derived from the data. DIGITIZER also produces text files of lengths, weights, and size-frequency histograms.Funding was provided by the National Science Foundation under Grant Nos. OCE-9806381, OCE-9940880, and OCE-0095069

Neutron scattering study of a quasi-2D spin-1/2 dimer system Piperazinium Hexachlorodicuprate under hydrostatic pressure

We report inelastic neutron scattering study of a quasi-two-dimensional S=1/2 dimer system Piperazinium Hexachlorodicuprate under hydrostatic pressure. The spin gap {\Delta} becomes softened with the increase of the hydrostatic pressure up to P= 9.0 kbar. The observed threefold degenerate triplet excitation at P= 6.0 kbar is consistent with the theoretical prediction and the bandwidth of the dispersion relation is unaffected within the experimental uncertainty. At P= 9.0 kbar the spin gap is reduced to 0.55 meV from 1.0 meV at ambient pressure.Comment: 4 pages, 5 figure

Rotational Dynamics of Organic Cations in CH3NH3PbI3 Perovskite

Methylammonium lead iodide (CH3NH3PbI3) based solar cells have shown impressive power conversion efficiencies of above 20%. However, the microscopic mechanism of the high photovoltaic performance is yet to be fully understood. Particularly, the dynamics of CH3NH3+ cations and their impact on relevant processes such as charge recombination and exciton dissociation are still poorly understood. Here, using elastic and quasi-elastic neutron scattering techniques and group theoretical analysis, we studied rotational modes of the CH3NH3+ cation in CH3NH3PbI3. Our results show that, in the cubic (T > 327K) and tetragonal (165K < T < 327K) phases, the CH3NH3+ ions exhibit four-fold rotational symmetry of the C-N axis (C4) along with three-fold rotation around the C-N axis (C3), while in orthorhombic phase (T < 165K) only C3 rotation is present. Around room temperature, the characteristic relaxation times for the C4 rotation is found to be ps while for the C3 rotation ps. The -dependent rotational relaxation times were fitted with Arrhenius equations to obtain activation energies. Our data show a close correlation between the C4 rotational mode and the temperature dependent dielectric permittivity. Our findings on the rotational dynamics of CH3NH3+ and the associated dipole have important implications on understanding the low exciton binding energy and slow charge recombination rate in CH3NH3PbI3 which are directly relevant for the high solar cell performance