Numerical solutions of several reflected shock-wave flow fields with nonequilibrium chemical reactions

The method of characteristics for a chemically reacting gas is used in the construction of the time-dependent, one-dimensional flow field resulting from the normal reflection of an incident shock wave at the end wall of a shock tube. Nonequilibrium chemical reactions are allowed behind both the incident and reflected shock waves. All the solutions are evaluated for oxygen, but the results are generally representative of any inviscid, nonconducting, and nonradiating diatomic gas. The solutions clearly show that: (1) both the incident- and reflected-shock chemical relaxation times are important in governing the time to attain steady state thermodynamic properties; and (2) adjacent to the end wall, an excess-entropy layer develops wherein the steady state values of all the thermodynamic variables except pressure differ significantly from their corresponding Rankine-Hugoniot equilibrium values

Risk of sexual recidivism as a function of age and actuarial risk

The study of risk for sexual recidivism has undergone substantial development in recent years. The foundation for advances in this area has been the use of actuarial measures to identify subgroups of offenders with different observed rates of sexual re-offending over time. An unresolved issue within this research area has been the moderating function of age in the assessment of risk. The current study examined sexual re-offending as a function of age and actuarial risk in a large sample of sexual offenders released from prison between 1990 and 2004. There was an overall decrease in the rate of sexual re-offending over the age of 50. However, a small group of offenders from the higher actuarial risk categories of the older age groups continued to re-offend at higher rates than their lower-risk peers. <br /

The physiological basis for genetic variation in water use efficiency and carbon isotope composition in Arabidopsis thaliana.

Ecologists and physiologists have documented extensive variation in water use efficiency (WUE) in Arabidopsis thaliana, as well as association of WUE with climatic variation. Here, we demonstrate correlations of whole-plant transpiration efficiency and carbon isotope composition (δ(13)C) among life history classes of A. thaliana. We also use a whole-plant cuvette to examine patterns of co-variation in component traits of WUE and δ(13)C. We find that stomatal conductance (g s) explains more variation in WUE than does A. Overall, there was a strong genetic correlation between A and g s, consistent with selection acting on the ratio of these traits. At a more detailed level, genetic variation in A was due to underlying variation in both maximal rate of carboxylation (V cmax) and maximum electron transport rate (Jmax). We also found strong effects of leaf anatomy, where lines with lower WUE had higher leaf water content (LWC) and specific leaf area (SLA), suggesting a role for mesophyll conductance (g m) in variation of WUE. We hypothesize that this is due to an effect through g m, and test this hypothesis using the abi4 mutant. We show that mutants of ABI4 have higher SLA, LWC, and g m than wild-type, consistent with variation in leaf anatomy causing variation in g m and δ(13)C. These functional data also add further support to the central, integrative role of ABI4 in simultaneously altering ABA sensitivity, sugar signaling, and CO2 assimilation. Together our results highlight the need for a more holistic approach in functional studies, both for more accurate annotation of gene function and to understand co-limitations to plant growth and productivity

Costs Associated with Malaria in Pregnancy in the Brazilian Amazon, a Low Endemic Area Where Plasmodium vivax Predominates.

BACKGROUND: Information on costs associated with malaria in pregnancy (MiP) in low transmission areas where Plasmodium vivax predominates is so far missing. This study estimates health system and patient costs of MiP in the Brazilian Amazon. METHODS/PRINCIPAL FINDINGS: Between January 2011 and March 2012 patient costs for the treatment of MiP were collected through an exit survey at a tertiary referral hospital and at a primary health care centre in the Manaus metropolitan area, Amazonas state. Pregnant and post-partum women diagnosed with malaria were interviewed after an outpatient consultation or at discharge after admission. Seventy-three interviews were included in the analysis. Ninety-six percent of episodes were due to P. vivax and 4% to Plasmodium falciparum. In 2010, the total median costs from the patient perspective were estimated at US $45.91 and US$216.29 for an outpatient consultation and an admission, respectively. When multiple P. vivax infections during the same pregnancy were considered, patient costs increased up to US $335.85, representing the costs of an admission plus an outpatient consultation. Provider direct and overhead cost data were obtained from several sources. The provider cost associated with an outpatient case, which includes several consultations at the tertiary hospital was US$103.51 for a P. vivax malaria episode and US $83.59 for a P. falciparum malaria episode. The cost of an inpatient day and average admission of 3 days was US$118.51 and US $355.53, respectively. Total provider costs for the diagnosis and treatment of all malaria cases reported in pregnant women in Manaus in 2010 (N = 364) were US$17,038.50, of which 92.4% (US$ 15,741.14) due to P. vivax infection. CONCLUSION: Despite being an area of low risk malaria transmission, MiP is responsible for a significant economic burden in Manaus. Especially when multiple infections are considered, costs associated with P. vivax are higher than costs associated with P. falciparum. The information generated may help health policy decisions for the current control and future elimination of malaria in the area

ACTwatch 2009 Supply Chain Survey Results, Nigeria

In Nigeria, as in many low-income countries, private commercial providers play an important role in the treatment of malaria. To design effective interventions for improved access to accurate diagnosis and effective malaria treatment, there is a need to understand retailer behaviour and identify the factors that influence their stocking and pricing decisions. Private commercial retailers are the last link in a chain of manufacturers, importers and wholesalers and their supply sources are likely to have an important influence on the price and quality of malaria treatment that consumers can access. However, there is limited rigorous evidence on the structure and operation of the distribution chain for antimalarial drugs that serves the retail sector. The ACTwatch Supply Chain Study, one of the ACTwatch project components, aims to address this gap by conducting quantitative and qualitative studies on distribution chains for antimalarials in the ACTwatch countries (Nigeria, Cambodia, Benin, the Democratic Republic of Congo, Madagascar, Uganda and Zambia). Other elements of ACTwatch include Retail Outlet and Household Surveys led by Population Services International (PSI). This report presents the results of a cross-sectional survey of antimalarial drug wholesalers conducted in Nigeria between July and September 2009

The private commercial sector distribution chain for antimalarial drugs in Benin - Findings from a rapid survey

In November 2008, the Global Fund to Fight HIV/AIDS, TB and Malaria announced that it would administer the first phase of an ambitious scheme to increase the availability of effective treatment for malaria, the Affordable Medicines Facility – malaria (AMFm). Artemisinin‐based combination therapies (ACTs) are highly‐effective, but remain prohibitively expensive for those who are most vulnerable to malaria infection.  AMFm aims to reduce significantly the price of ACTs by offering a co‐payment for ACTs purchased by eligible buyers at the top of the supply chain.    Recognizing that the public and private sectors are important sources of antimalarials in most endemic countries, both public and private sector buyers will be entitled to purchase subsidized ACTs.  The involvement of the private sector is an innovative element of AMFm, as many countries already have experience distributing ACTs in the public sector. To ensure that subsidized ACTs reach patients at the lowest possible cost, it is necessary to gain a better understanding of the private sector supply chains for antimalarials in each country participating in AMFm.   The objective of the rapid supply chain survey was therefore to assist Benin, which is one of the 11 countries invited to apply to the first phase of AMFm, in the development of an effective implementation plan by providing an understanding of the current supply chain for antimalarials, and the way in which subsidised ACTs are likely to travel through this chain to reach patients.  This report presents the findings of a series of semi‐structured interviews conducted with government officials and private suppliers of malaria treatment operating at the various levels of the chain.   At the time of the survey, antimalarial products sold in the private commercial sector were procured from international and domestic manufacturers by 3 active registered wholesalers and Benin’s public sector procurement agent: the Centrale d’Achat des Médicaments Essentiels et des Consommables médicaux (CAME). Manufacturers do not have sole distributorship agreements for registered pharmaceuticals, or other special relationships with particular wholesalers. Consequently, each wholesaler regularly stocks a large proportion of the antimalarials registered in Benin. CAME is responsible for procuring the generic medicines on the National Essential Medicines List. In practice CAME procures and supplies antimalarials not included on the National Essential Medicines List, as it is currently out of date

The private commercial sector distribution chain for antimalarial drugs in Nigeria - Findings from a rapid survey

In November of 2008, the Global Fund to Fight HIV/AIDS, TB and Malaria announced that it would administer the first phase of an ambitious scheme to increase the availability of effective treatment for malaria, the Affordable Medicines Facility-malaria (AMFm). Artemisinin-based combination therapies (ACTs) are highly effective, but remain prohibitively expensive for those who are most vulnerable to malaria infection.1 The AMFm aims to significantly reduce the price of ACTs by offering a co-payment for ACTs purchased by eligible buyers at the top of the supply chain. Recognizing that the public and private sectors are important sources of antimalarials in most endemic countries, both public and private sector buyers will be entitled to purchase subsidised ACTs. The involvement of the private sector is an innovative element of AMFm, as many countries already have experience distributing ACTs in the public sector. To ensure that subsidised ACTs reach patients at the lowest possible cost, it is necessary to gain a better understanding of the private sector supply chains for antimalarials in each country participating in the AMFm. The objective of the rapid supply chain survey was therefore to assist Nigeria, which is one of the 11 countries invited to apply to the first phase of the AMFm, in the development of an effective implementation plan by providing an understanding of the current supply chain for antimalarials, and the way in which subsidised ACTs are likely to travel through this chain to reach patients. This report presents the findings of a series of semi-structured interviews conducted with government officials and private suppliers of malaria treatment operating at the various levels of the chain. Supplemental sections include brief discussions on the Nigerian drug monitoring system, on the proposed tax exemption for subsidised ACTs under the AMFm, and also on the private sector capacity to repackage and re-label imported subsidised ACTs. In addition, data from the December 2008 report on the first round of the ACTwatch Outlet Survey in Nigeria were used to estimate key variables, such as antimalarial market shares

Gauge invariances vis-{\'a}-vis Diffeomorphisms in second order metric gravity: A new Hamiltonian approach

A new analysis of the gauge invariances and their unity with diffeomorphism invariances in second order metric gravity is presented which strictly follows Dirac's constrained Hamiltonian approach.Comment: 6 Pages, revTex, paper modified substantiall