2,323 research outputs found
The impact of regulation, ownership and business culture on managing corporate risk within the water industry
Although the specifics of water utility ownership, regulation and management culture have been explored in terms of their impact on economic and customer value, there has been little meaningful engagement with their influence on the risk environment and risk management. Using a literature review as the primary source of information, this paper maps the existing knowledge base onto two critical questions: what are the particular features of regulation, ownership and management culture which influence the risk dynamic, and what are the implications of these relationships in the context of ambitions for resilient organizations? In addressing these queries, the paper considers the mindful choices and adjustments a utility must make to its risk management strategy to manage strategic tensions between efficiency, risk and resilience. The conclusions note a gap in understanding of the drivers required for a paradigm shift within the water sector from a re-active to a pro-active risk management culture. A proposed model of the tensions between reactive risk management and pro-active, adaptive risk management provides a compelling case for measured risk management approaches which are informed by an appreciation of regulation, ownership and business culture. Such approaches will support water authorities in meeting corporate aspirations to become "high reliability" services while retaining the capacity to out-perform financial and service level targets
Safe Haven, Adoption and Birth Record Laws: Where are the Daddies?
An earlier version of this paper was presented by Professor Parness at the Third Annual Wells Conference on Adoption Law under the title, "Safe Haven Laws: Where Are the Daddies?", at Capital University Law School on February 15, 2007. The paper explores the difficulties in American state safe haven, adoption and birth record laws, crystalized in the question: "Where are the daddies?" After briefly reviewing safe haven laws, the paper demonstrates how paternity interests are unreasonably, if not unconstitutionally, foreclosed when children are abandoned by their mothers. Comparable paternity losses due to maternal acts are then shown under adoption and birth record laws. Lost daddies are unwarranted because maternal privacy rights and interests should not easily foreclose chances for responsible fatherhood, especially where births result from consensual sex between unwed partners. There should be differences in law between abortion decisions and maternal decisions about children in safe haven, adoption, and birth record settings. These differences should reflect the differing societal interests, maternal interests, and paternal interests in protecting potential human life and in protecting born alive human life. Neither maternal decisional privacy nor maternal informational privacy foreclose expanded protections for legal paternity opportunities and rights. The paper concludes with suggested paternity law reforms
Uncertainty, Technical Change, and Policy Models
Both climate change and technical change are uncertain. In this paper we show the importance of including both uncertainties when modeling for policy analysis. We then develop an approach for incorporating uncertainty of technical change into climate change policy analysis. We define and demonstrate a protocol for bottom-up expert assessments about prospects for technologies. We then describe a method for using such assessments to derive a probability distribution over future abatement curves, and to estimate random return functions for technological investment in different areas. Finally, we show how these analytic results could be used in a variety of energy-economic models for policy analysis
Nod1 signaling overcomes resistance of S. pneumoniae to opsonophagocytic killing
Airway infection by the Gram-positive pathogen Streptococcus pneumoniae (Sp) leads to recruitment of neutrophils but
limited bacterial killing by these cells. Co-colonization by Sp and a Gram-negative species, Haemophilus influenzae (Hi),
provides sufficient stimulus to induce neutrophil and complement-mediated clearance of Sp from the mucosal surface
in a murine model. Products from Hi, but not Sp, also promote killing of Sp by ex vivo neutrophil-enriched peritoneal
exudate cells. Here we identify the stimulus from Hi as its peptidoglycan. Enhancement of opsonophagocytic killing
was facilitated by signaling through nucleotide-binding oligomerization domain-1 (Nod1), which is involved in
recognition of γ-D-glutamyl-meso-diaminopimelic acid (meso-DAP) contained in cell walls of Hi but not Sp. Neutrophils
from mice treated with Hi or compounds containing meso-DAP, including synthetic peptidoglycan fragments, showed
increased Sp killing in a Nod1-dependent manner. Moreover, Nod1-/- mice showed reduced Hi-induced clearance of Sp
during co-colonization. These observations offer insight into mechanisms of microbial competition and demonstrate
the importance of Nod1 in neutrophil-mediated clearance of bacteria in vivo
Prion diseases are efficiently transmitted by blood transfusion in sheep
The emergence of variant Creutzfeld-Jakob disease, following on from the bovine spongiform encephalopathy (BSE) epidemic, led to concerns about the potential risk of iatrogenic transmission of disease by blood transfusion and the introduction of costly control measures to protect blood supplies. We previously reported preliminary data demonstrating the transmission of BSE and natural scrapie by blood transfusion in sheep. The final results of this experiment, reported here, give unexpectedly high transmission rates by transfusion of 36% for BSE and 43% for scrapie. A proportion of BSE-infected tranfusion recipients (3 of 8) survived for up to 7 years without showing clinical signs of disease. The majority of transmissions resulted from blood collected from donors at more than 50% of the estimated incubation period. The high transmission rates and relatively short and consistent incubation periods in clinically positive recipients suggest that infectivity titers in blood were substantial and/or that blood transfusion is an efficient method of transmission. This experiment has established the value of using sheep as a model for studying transmission of variant Creutzfeld-Jakob disease by blood products in humans. (Blood. 2008; 112: 4739-4745
Flight test of the X-29A at high angle of attack: Flight dynamics and controls
The NASA Dryden Flight Research Center has flight tested two X-29A aircraft at low and high angles of attack. The high-angle-of-attack tests evaluate the feasibility of integrated X-29A technologies. More specific objectives focus on evaluating the high-angle-of-attack flying qualities, defining multiaxis controllability limits, and determining the maximum pitch-pointing capability. A pilot-selectable gain system allows examination of tradeoffs in airplane stability and maneuverability. Basic fighter maneuvers provide qualitative evaluation. Bank angle captures permit qualitative data analysis. This paper discusses the design goals and approach for high-angle-of-attack control laws and provides results from the envelope expansion and handling qualities testing at intermediate angles of attack. Comparisons of the flight test results to the predictions are made where appropriate. The pitch rate command structure of the longitudinal control system is shown to be a valid design for high-angle-of-attack control laws. Flight test results show that wing rock amplitude was overpredicted and aileron and rudder effectiveness were underpredicted. Flight tests show the X-29A airplane to be a good aircraft up to 40 deg angle of attack
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Promiscuous and Selective: How Intrinsically Disordered BH3 Proteins Interact with Their Pro-survival Partner MCL-1.
The BCL-2 family of proteins plays a central role in regulating cell survival and apoptosis. Disordered BH3-only proteins bind promiscuously to a number of different BCL-2 proteins, with binding affinities that vary by orders of magnitude. Here we investigate the basis for these differences in affinity. We show that eight different disordered BH3 proteins all bind to their BCL-2 partner (MCL-1) very rapidly, and that the differences in sequences result in different dissociation rates. Similarly, mutation of the binding surface of MCL-1 generally affects association kinetics in the same way for all BH3 peptides but has significantly different effects on the dissociation rates. Importantly, we infer that the evolution of homologous, competing interacting partners has resulted in complexes with significantly different lifetimes.Jane Clarke is supported by the Wellcome Trust (grant number WT095195) and Liza Dahal is supported by an EPSRC (UK) studentship
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