Quantum Spin Dynamics (QSD) II

We continue here the analysis of the previous paper of the Wheeler-DeWitt constraint operator for four-dimensional, Lorentzian, non-perturbative, canonical vacuum quantum gravity in the continuum. In this paper we derive the complete kernel, as well as a physical inner product on it, for a non-symmetric version of the Wheeler-DeWitt operator. We then define a symmetric version of the Wheeler-DeWitt operator. For the Euclidean Wheeler-DeWitt operator as well as for the generator of the Wick transform from the Euclidean to the Lorentzian regime we prove existence of self-adjoint extensions and based on these we present a method of proof of self-adjoint extensions for the Lorentzian operator. Finally we comment on the status of the Wick rotation transform in the light of the present results.Comment: 27 pages, Latex, preceded by a companion paper before this on

Flavour Symmetries and Kahler Operators

Any supersymmetric mechanism to solve the flavour puzzle would generate mixing both in the superpotential Yukawa couplings and in the Kahler potential. In this paper we study, in a model independent way, the impact of the nontrivial structure of the Kahler potential on the physical mixing matrix, after kinetic terms are canonically normalized. We undertake this analysis both for the quark sector and the neutrino sector. For the quark sector, and in view of the experimental values for the masses and mixing angles, we find that the effects of canonical normalization are subdominant. On the other hand, for the leptonic sector we obtain different conclusions depending on the spectrum of neutrinos. In the hierarchical case we obtain similar conclusion as in the quark sector, whereas in the degenerate and inversely hierarchical case, important changes in the mixing angles could be expected.Comment: 22 pages, LaTe

Neutrino Mass from R-parity Violation in Split Supersymmetry

We investigate how the observed neutrino data can be accommodated by R-parity violation in Split Supersymmetry. The atmospheric neutrino mass and mixing are explained by the bilinear parameters $\xi_i$ inducing the neutrino-neutralino mixing as in the usual low-energy supersymmetry. Among various one-loop corrections, only the quark-squark exchanging diagrams involving the order-one trilinear couplings $\lambda'_{i23,i32}$ can generate the solar neutrino mass and mixing if the scalar mass $m_S$ is not larger than $10^9$ GeV. This scheme requires an unpleasant hierarchical structure of the couplings, e.g., $\lambda_{i23,i32}\sim 1$, $\lambda'_{i33} \lesssim 10^{-4}$ and $\xi_i \lesssim 10^{-6}$. On the other hand, the model has a distinct collider signature of the lightest neutralino which can decay only to the final states, $l_i W^{(*)}$ and $\nu Z^{(*)}$, arising from the bilinear mixing. Thus, the measurement of the ratio; $\Gamma(e W^{(*)}) : \Gamma(\mu W^{(*)}) : \Gamma(\tau W^{(*)})$ would provide a clean probe of the small reactor and large atmospheric neutrino mixing angles as far as the neutralino mass is larger than 62 GeV.Comment: 10 pages, 3 figures, version submitted to JHE

Exact boundary S-matrices of the supersymmetric sine-Gordon theory on a half line

Using the boundary Yang-Baxter equations and exact results on the bulk $S$-matrices, we compute exact boundary scattering amplitudes of the supersymmetric sine-Gordon model with integrable boundary potentials.Comment: 15 pages, requires phyzzx.tex. Serious typo-errors are correcte

Sentencing drug offenders under the 2003 Criminal Justice Act: Challenges for the probation service

For the most part the 2003 Criminal Justice Act, which came into effect in England and Wales in April 2005, was accepted by the probation service with relatively little opposition. Given the enormity of its impact acquiescence to this degree of change ought to come as something of a surprise. The 2003 Act changed fundamentally the nature of community supervision, it brought to an end the traditional range of non-custodial penalties and replaced them with a single community order to which sentencers could add any of 12 possible requirements. This paper considers the impact of the 2003 legislation on one particular offender group - drug misusers. Drug misusing offenders have the potential to pose serious difficulties for probation officers; the habitual nature of drug addiction and a tendency toward an irregular lifestyle make drug misusers particularly susceptible to breach. Under the new legislation courts have significantly fewer options available to them when responding to incidents of offender non-compliance. This paper argues that many of the provisions of the 2003 Act together with developments elsewhere in the UK are likely to have impacted disproportionately on those groups whose lifestyles are chaotic and whose routines are incompatible with the terms and conditions of modern day probation practice. It concludes that greater flexibility towards non-compliance, supported by regular and consistent judicial review, would encourage improved rates of compliance and retention in treatment and improved outcomes for offenders

Maternal health in resource-poor urban settings: how does women's autonomy influence the utilization of obstetric care services?

Background: Despite various international efforts initiated to improve maternal health, morethan half a million women worldwide die each year as a result of complications arising frompregnancy and childbirth. This research was guided by the following questions: 1) How doeswomen's autonomy influence the choice of place of delivery in resource-poor urban settings? 2)Does its effect vary by household wealth? and 3) To what extent does women's autonomy mediatethe relationship between women's education and use of health facility for delivery?Methods: The data used is from a maternal health study carried out in the slums of Nairobi, Kenya.A total of 1,927 women (out of 2,482) who had a pregnancy outcome in 2004–2005 were selectedand interviewed. Seventeen variable items on autonomy were used to construct women's decisionmaking,freedom of movement, and overall autonomy. Further, all health facilities serving the studypopulation were assessed with regard to the number, training and competency of obstetric staff;services offered; physical infrastructure; and availability, adequacy and functional status of suppliesand other essential equipment for safe delivery, among others. A total of 25 facilities weresurveyed.Results: While household wealth, education and demographic and health covariates had strongrelationships with place of delivery, the effects of women's overall autonomy, decision-making andfreedom of movement were rather weak. Among middle to least poor households, all threemeasures of women's autonomy were associated with place of delivery, and in the expecteddirection; whereas among the poorest women, they were strong and counter-intuitive. Finally, thestudy showed that autonomy may not be a major mediator of the link between education and useof health services for delivery.Conclusion: The paper argues in favor of broad actions to increase women's autonomy both asan end and as a means to facilitate improved reproductive health outcomes. It also supports thecall for more appropriate data that could further support this line of action. It highlights the needfor efforts to improve households' livelihoods and increase girls' schooling to alter perceptions ofthe value of skilled maternal health care

Community land formalization and company land acquisition procedures: A review of 33 procedures in 15 countries

Indigenous and community lands, crucial for rural livelihoods, are typically held under informal customary tenure arrangements. This can leave the land vulnerable to outside commercial interests, so communities may seek to formalize their land rights in a government registry and obtain an official land document. But this process can be time-consuming and complex, and in contrast, companies can acquire land relatively quickly and find shortcuts around regulatory burdens. This article reviews and maps 19 community land formalization and 14 company land acquisition procedures is 15 countries in Africa, Asia and Latin America. Comparing community and company procedures identifies multiple sources of inequity