Carbon Free Boston: Technical Summary

Part of a series of reports that includes: Carbon Free Boston: Summary Report; Carbon Free Boston: Social Equity Report; Carbon Free Boston: Buildings Technical Report; Carbon Free Boston: Transportation Technical Report; Carbon Free Boston: Waste Technical Report; Carbon Free Boston: Energy Technical Report; Carbon Free Boston: Offsets Technical Report; Available at http://sites.bu.edu/cfb/OVERVIEW: This technical summary is intended to argument the rest of the Carbon Free Boston technical reports that seek to achieve this goal of deep mitigation. This document provides below: a rationale for carbon neutrality, a high level description of Carbon Free Boston’s analytical approach; a summary of crosssector strategies; a high level analysis of air quality impacts; and, a brief analysis of off-road and street light emissions.Published versio

Current Density Functional Theory for one-dimensional fermions

The frequency-dependent response of a one-dimensional fermion system is investigated using Current Density Functional Theory (CDFT) within the local approximation (LDA). DFT-LDA, and in particular CDFT-LDA, reproduces very well the dispersion of the collective excitations. Unsurprisingly, however, the approximation fails for details of the dynamic response for large wavevectors. In particular, we introduce CDFT for the one-dimensional spinless fermion model with nearest-neighbor interaction, and use CDFT-LDA plus exact (Bethe ansatz) results for the groundstate energy as function of particle density and boundary phase to determine the linear response. The successes and failures of this approach are discussed in detail

Remembering global disasters and the construction of cosmopolitan memory

Debates on the relationship between media and memory have recently focused on the potential of globally mediated events to expand collective memory beyond national borders, to what Levy and Sznaider (2006, 2010) have described as "cosmopolitan memory". This article critically engages with the concept of cosmopolitan memory and provides an empirical contribution to the relevant debate drawing upon a study of focus group discussions with Greek audiences remembering global disasters. The article argues that the memories of these events place audience members within a global community of viewers simultaneously witnessing the same events. However, they do not necessarily challenge the primacy of the nation as a moral community, therefore lacking the moral dimension implicit in the concept of cosmopolitan memory

Visceral Leishmaniasis in a New York Foxhound Kennel

Although endemic throughout much of the world, autochthonous visceral leishmaniasis has been reported on only 3 previous occasions in North America. After diagnosis of visceral leishmaniasis in 4 foxhounds from a kennel in Dutchess County, New York (index kennel), serum and ethylenediamine-tetraacetic acid (EDTA)-anticoagulated blood were collected from the remaining 108 American or cross-bred foxhounds in the index kennel and from 30 Beagles and Basset Hounds that were periodically housed in the index kennel. Samples were analyzed for antibodies to or DNA of tickborne disease pathogens and Leishmania spp. Most dogs had antibodies to Rickettsia spp., Ehrlichia spp., Babesia spp., or some combination of these pathogens but not to Bartonella vinsonii (berkhoffi). However, DNA of rickettsial, ehrlichial, or babesial agents was detected in only 9 dogs. Visceral leishmaniasis was diagnosed in 46 of 112 (41%) foxhounds from the index kennel but was not diagnosed in any of the Beagles and Basset Hounds. A positive Leishmania status was defined by 1 or more of the following criteria: a Leishmania antibody titeror = 1:64, positive Leishmania polymerase chain reaction (PCR), positive Leishmania culture, or identification of Leishmania amastigotes by cytology or histopathology. The species and zymodeme of Leishmania that infected the foxhounds was determined to be Leishmania infantum MON-1 by isoenzyme electrophoresis. Foxhounds that were18 months of age or that had traveled to the southeastern United States were more likely to be diagnosed with visceral leishmaniasis. Transmission of Leishmania spp. in kennel outbreaks may involve exposure to an insect vector, direct transmission, or vertical transmission

A novel topographic parameterization scheme indicates that martian gullies display the signature of liquid water

Martian gullies resemble gullies carved by water on Earth, yet are thought to have formed in an extremely cold (2-driven processes. That this argument persists demonstrates the limitations of morphological interpretations made from 2D images, especially when similar-looking landforms can form by very different processes. To overcome this we have devised a parameterization scheme, based on statistical discriminant analysis and hydrological terrain analysis of meter-scale digital topography data, which can distinguish between dry and wet surface processes acting on a landscape. Applying this approach to new meter-scale topographic datasets of Earth, the Moon and Mars, we demonstrate that martian gullied slopes are dissimilar to dry, gullied slopes on Earth and the Moon, but are similar to both terrestrial debris flows and fluvial gullies. We conclude that liquid water was integral to the process by which martian gullies formed. Finally, our work shows that quantitative 3D analyses of landscape have great potential as a tool in planetary science, enabling remote assessment of processes acting on planetary surfaces

Different routes, common directions? Activation policies for young people in Denmark and the UK

This article analyses and compares the development of activation policies for young people in Denmark and the UK from the mid-1990s. Despite their diverse welfare traditions and important differences in the organisation and delivery of benefits and services for the unemployed, both countries have recently introduced large-scale compulsory activation programmes for young people. These programmes share a number of common features, especially a combination of strong compulsion and an apparently contradictory emphasis on client-centred training and support for participants. The suggested transition from the ‘Keynesian welfare state’ to the ‘Schumpeterian workfare regime’ is used as a framework to discuss the two countries’ recent moves towards activation. It is argued that while this framework is useful in explaining the general shift towards active labour-market policies in Europe, it alone cannot account for the particular convergence of the Danish and British policies in the specific area of youth activation. Rather, a number of specific political factors explaining the development of policies in the mid-1990s are suggested. The article concludes that concerns about mass youth unemployment, the influence of the ‘dependency culture’ debate in various forms, cross-national policy diffusion and, crucially, the progressive re-engineering of compulsory activation by strong centre-left governments have all contributed to the emergence of policies that mix compulsion and a commitment to the centrality of work with a ‘client-centred approach’ that seeks to balance more effective job seeking with human resource development. However, attempts to combine the apparently contradictory concepts of ‘client-centredness’ and compulsion are likely to prove politically fragile, and both countries risk lurching towards an increasingly workfarist approach

Assessing function and endurance in adults with spinal and bulbar muscular atrophy: validity of the adult myopathy assessment tool.

Purpose. The adult myopathy assessment tool (AMAT) is a performance-based battery comprised of functional and endurance subscales that can be completed in approximately 30 minutes without the use of specialized equipment. The purpose of this study was to determine the construct validity and internal consistency of the AMAT with a sample of adults with spinal and bulbar muscular atrophy (SBMA). Methods. AMAT validity was assessed in 56-male participants with genetically confirmed SBMA (mean age, 53 ± 10 years). The participants completed the AMAT and assessments for disease status, strength, and functional status. Results. Lower AMAT scores were associated with longer disease duration (r = -0.29; P \u3c 0.03) and lower serum androgen levels (r = 0.49-0.59; P \u3c 0.001). The AMAT was significantly correlated with strength and functional status (r = 0.82-0.88; P \u3c 0.001). The domains of the AMAT exhibited good internal consistency (Cronbach\u27s α  = 0.77-0.89; P \u3c 0.001). Conclusions. The AMAT is a standardized, performance-based tool that may be used to assess functional limitations and muscle endurance. The AMAT has good internal consistency, and the construct validity of the AMAT is supported by its significant associations with hormonal, strength, and functional characteristics of adults with SBMA. This trial is registered with Clinicaltrials.gov identifier NCT00303446

Xenopus Hybrids Provide Insight Into Cell and Organism Size Control

Determining how size is controlled is a fundamental question in biology that is poorly understood at the organismal, cellular, and subcellular levels. The Xenopus species, X. laevis and X. tropicalis differ in size at all three of these levels. Despite these differences, fertilization of X. laevis eggs with X. tropicalis sperm gives rise to viable hybrid animals that are intermediate in size. We observed that although hybrid and X. laevis embryogenesis initiates from the same sized zygote and proceeds synchronously through development, hybrid animals were smaller by the tailbud stage, and a change in the ratio of nuclear size to cell size was observed shortly after zygotic genome activation (ZGA), suggesting that differential gene expression contributes to size differences. Transcriptome analysis at the onset of ZGA identified twelve transcription factors paternally expressed in hybrids. A screen of these X. tropicalis factors by expression in X. laevis embryos revealed that Hes7 and Ventx2 significantly reduced X. laevis body length size by the tailbud stage, although nuclear to cell size scaling relationships were not affected as in the hybrid. Together, these results suggest that transcriptional regulation contributes to biological size control in Xenopus

Coccolithophore Growth and Calcification in an Acidified Ocean: Insights From Community Earth System Model Simulations

Anthropogenic CO2 emissions are inundating the upper ocean, acidifying the water, and altering the habitat for marine phytoplankton. These changes are thought to be particularly influential for calcifying phytoplankton, namely, coccolithophores. Coccolithophores are widespread and account for a substantial portion of open ocean calcification; changes in their abundance, distribution, or level of calcification could have far‐reaching ecological and biogeochemical impacts. Here, we isolate the effects of increasing CO2 on coccolithophores using an explicit coccolithophore phytoplankton functional type parameterization in the Community Earth System Model. Coccolithophore growth and calcification are sensitive to changing aqueous CO2. While holding circulation constant, we demonstrate that increasing CO2 concentrations cause coccolithophores in most areas to decrease calcium carbonate production relative to growth. However, several oceanic regions show large increases in calcification, such the North Atlantic, Western Pacific, and parts of the Southern Ocean, due to an alleviation of carbon limitation for coccolithophore growth. Global annual calcification is 6% higher under present‐day CO2 levels relative to preindustrial CO2 (1.5 compared to 1.4 Pg C/year). However, under 900 &mu;atm CO2, global annual calcification is 11% lower than under preindustrial CO2 levels (1.2 Pg C/year). Large portions of the ocean show greatly decreased coccolithophore calcification relative to growth, resulting in significant regional carbon export and air‐sea CO2 exchange feedbacks. Our study implies that coccolithophores become more abundant but less calcified as CO2 increases with a tipping point in global calcification (changing from increasing to decreasing calcification relative to preindustrial) at approximately &sim;600 &mu;atm CO2. Plain Language Summary CO2 emissions from human activity are inundating the upper ocean causing ocean acidification. Coccolithophores, a widespread type of marine algae that make calcium carbonate shells, may be particularly influenced by ocean acidification. In this study we created a phytoplankton‐type representative of coccolithophores in the Community Earth System Model. We performed experiments to explore how ocean acidification from increasing CO2 affects coccolithophore growth and calcification. We found that, as CO2 rises, coccolithophores increase in abundance in several oceanic regions, including the North Atlantic, Western Pacific, and parts of the Southern Ocean, due to a carbon fertilization effect on coccolithophore photosynthesis. However, most areas of the ocean showed decreases in coccolithophore calcification as CO2 increases and ocean acidification becomes more severe. We project that end‐of‐the‐century CO2 concentrations result 11% less oceanic calcification on a global scale relative to preindustrial CO2 levels. Overall, coccolithophores become more abundant in certain regions but are more lightly calcified with increasing CO2. Key Points An explicit coccolithophore representation in a major Earth System Model is described Increasing CO2 stimulates coccolithophore growth in certain regions, but calcification is impaired Future CO2 conditions drive a decrease in global marine calcium carbonate production</p