Computing projections for the Karmarkar algorithm

AbstractAlternatives are considered for computing the projection of a vector onto the nullspace of a matrix, as is required to compute the step direction for the Karmarkar projective algorithm. Among the possibilities considered are forming and factoring the normal matrix, and working with a larger but sparser extended matrix. The extended matrices are symmetric but indefinite. A modification to the Harwell MA27 set of subroutines to make them more efficient for indefinite matrices is presented. Computational results are given to support the conclusion that computing these projections using one of the extended matrices offers significant computational advantages over the other alternatives with which it is compared

Addressing and adapting to contemporary coastal management issues in the central Philippines

With arguably the world’s most decentralized coastal governance regime, the Philippines has implemented integrated coastal management (ICM) for over 30 years as one of the most successful frameworks for coastal resource management in the country. Anthropogenic drivers continue to threaten the food security and livelihood of coastal residents; contributing to the destruction of critical marine habitats, which are heavily relied upon for the goods and services they provide. ICM initiatives in the Philippines have utilized a variety of tools, particularly marine protected areas (MPAs), to promote poverty alleviation through food security and sustainable forms of development. From the time marine reserves were first shown to effectively address habitat degradation and decline in reef fishery production (Alcala et al., 2001) over 1,100 locally managed MPAs have been established in the Philippines; yet only 10-20% of these are effectively managed (White et al., 2006; PhilReefs, 2008). In order to increase management effectiveness, biophysical, legal, institutional and social linkages need to be strengthened and “scaled up” to accommodate a more holistic systems approach (Lowry et al., 2009). This summary paper incorporates the preliminary results of five independently conducted studies. Subject areas covered are the social and institutional elements of MPA networks, ecosystem-based management applicability, financial sustainability and the social vulnerability of coastal residents to climate change in the Central Philippines. Each section will provide insight into these focal areas and suggest how management strategies may be adapted to holistically address these contemporary issues. (PDF contains 4 pages

Comparative Effectiveness of Step-up Therapies in Children with Asthma Prescribed Inhaled Corticosteroids : A Historical Cohort Study

This work was supported by the Respiratory Effectiveness Group. Acknowledgments We thank the Respiratory Effectiveness Group for funding this work, Annie Burden for assistance with statistics, and Simon Van Rysewyk and Lisa Law for assistance with medical writing.Peer reviewedPostprin

2006 Housing in the Nation's Capital

Explores the interdependent relationship between public school systems and housing markets, and examines the ability of coordinated investment in affordable housing and quality education to revitalize Washington, D.C., metropolitan area neighborhoods

Experiences of sexual well-being interventions in males affected by genitourinary cancers and their partners: an integrative systematic review.

Sexual well-being has been identified as an unmet supportive care need among many individuals with genitourinary (GU) cancers. Little is known about the experiences of using sexual well-being interventions among men and their partners. This review was reported using the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) and followed a systematic review protocol. Data extraction and methodological quality appraisal were performed, and a narrative synthesis was conducted. A total of 21 publications (reporting on 18 studies) were included: six randomised control trials, seven cross-sectional studies, three qualitative studies, and five mixed methods studies. Sexual well-being interventions comprised medical/pharmacological and psychological support, including counselling and group discussion facilitation. The interventions were delivered using various modes: face-to-face, web-based/online, or telephone. Several themes emerged and included broadly: (1) communication with patient/partner and healthcare professionals, (2) educational and informational needs, and (3) timing and/or delivery of the interventions. Sexual well-being concerns for men and their partners were evident from diagnosis and into survivorship. Participants benefited from interventions but many articulated difficulties with initiating the topic due to embarrassment and limited access to interventions in cancer services. Noteworthy, all studies were only representative of men diagnosed with prostate cancer, underscoring a significant gap in other GU cancer patient groups where sexual dysfunction is a prominent consequence of treatment. This systematic review provides valuable new insights to inform future models of sexual well-being recovery interventions for patients and partners with prostate cancer, but further research is urgently needed in other GU cancer populations