Socioeconomics and values of resources in great Lake-Tonle Sap and Mekong-Bassac area : results from a sample survey in Kampong Chhnang, Siem Reap and Kandal provinces, Cambodia

Socioeconomics aspects, Fishery economics, Cambodia,

Reduced hadronic uncertainty in the determination of VudV_{ud}

We analyze the universal radiative correction $\Delta_R^V$ to neutron and superallowed nuclear $\beta$ decay by expressing the hadronic $\gamma W$-box contribution in terms of a dispersion relation, which we identify as an integral over the first Nachtmann moment of the $\gamma W$ interference structure function $F_3^{(0)}$. By connecting the needed input to existing data on neutrino and antineutrino scattering, we obtain an updated value of $\Delta_R^V = 0.02467(22)$, wherein the hadronic uncertainty is reduced. Assuming other Standard Model theoretical calculations and experimental measurements remain unchanged, we obtain an updated value of $|V_{ud}| = 0.97366(15)$, raising tension with the first row CKM unitarity constraint. We comment on ways current and future experiments can provide input to our dispersive analysis.Comment: 5 pages, 5 figures, references updated; version submitted to PR

Fish fights over fish rights: Conflicts arising from re-allocation of fishing lots: perceptions from community fisheries in Cambodia

Disputes, Aquaculture, Cambodia,

Nucleon Electric Dipole Moments and the Isovector Parity- and Time-Reversal-Odd Pion-Nucleon Coupling

The isovector time-reversal- and parity-violating pion-nucleon coupling $\bar{g}_{\pi}^{(1)}$ is uniquely sensitive to dimension six interactions between right-handed light quarks and the Standard Model Higgs doublet that naturally arises in left-right symmetric models. Recent work has used the $\bar{g}_{\pi}^{(1)}$-induced one-loop contribution to the neutron electric dipole moment $d_n$, together with the present experimental $d_n$ bound, to constrain the CP-violating parameters of the left-right symmetric model. We show that this and related analyses are based on an earlier meson theory $d_n$ computation that is not consistent with the power-counting appropriate for an effective field theory. We repeat the one-loop calculation using heavy baryon chiral perturbation theory and find that the resulting $d_n$ sensitivity to $\bar{g}_{\pi}^{(1)}$ is suppressed, implying more relaxed constraints on the parameter space of the left-right symmetric model. Assuming no cancellations between this loop contribution and other contributions, such as the leading order EDM low-energy constant, the present limit on $d_n$ implies $|\bar{g}_{\pi}^{(1)}| \lesssim 1.1\times 10^{-10}$.Comment: 10 pages, 4 figure

Critical Fidelity

Using a Wigner Lorentzian Random Matrix ensemble, we study the fidelity, $F(t)$, of systems at the Anderson metal-insulator transition, subject to small perturbations that preserve the criticality. We find that there are three decay regimes as perturbation strength increases: the first two are associated with a gaussian and an exponential decay respectively and can be described using Linear Response Theory. For stronger perturbations $F(t)$ decays algebraically as $F(t)\sim t^{-D_2}$, where $D_2$ is the correlation dimension of the critical eigenstates.Comment: 4 pages, 3 figures. Revised and published in Phys. Rev. Let

Abuse‐Related Post‐Traumatic Stress, Coping, and Tobacco Use in Pregnancy

Objective: To examine the relationship between trauma history, posttraumatic stress disorder (PTSD), coping, and smoking in a diverse sample of pregnant women, some of whom are active smokers. Design: Secondary analysis from a prospective study on PTSD and pregnancy outcomes. Setting: Maternity clinics at three health systems in the midwestern United States. Participants: Women age 18 or older (1,547) interviewed at gestational age fewer than 28 weeks. Methods: Participants were classified at nonsmokers, quitters (stopped smoking during pregnancy), and pregnancy smokers. Demographic, trauma, and pregnancy factors, substance use, and use of tobacco to cope were compared across groups. Logistic regression assessed the influence of these factors on being a smoker versus a nonsmoker and a quitter versus a pregnancy smoker. Results: Smokers differed from nonsmokers on all demographic risk factors (being African American, being pregnant as a teen, having lower income and less education, and living in high‐crime areas), had higher rates of current and lifetime PTSD, and were more likely to report abuse as their worst trauma. Pregnancy smokers had lower levels of education, were more likely to classify their worst trauma as “extremely troubling,” and were more likely to exhibit PTSD hyperarousal symptoms. In regression models, smoking “to cope with emotions and problems” doubled the odds of continuing to smoke while pregnant even after accounting for several relevant risk factors. Conclusion: Smoking behavior in pregnancy may be influenced by the need to cope with abuse‐related PTSD symptoms. Clinicians should consider using trauma‐informed interventions when working with tobacco‐using pregnant women.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/86982/1/j.1552-6909.2011.01261.x.pd

Ultrasonic verification of five wave fronts in unidirectional graphite epoxy composite

The existence of five different waves fronts in a unidirectional graphite fiber reinforced epoxy composite with energy flux propagation at the angle of 60 deg with respect to the fiber direction is verified by measuring their corresponding group and phase velocities of longitudinal and shear waves using the through transmission technique. The experimental and theoretical values of phase velocities show excellent agreement for all three modes of wave propagation. It is also verified that the maximum output voltage amplitude is obtained when the line joining the centers of the transmitting and receiving transducers is parallel to the energy propagation direction defined by the deviation angle

A surface circulation study in middle Elizabeth River

A new oil refinery has been proposed to be located in Portsmouth, Virginia south of the Hampton Roads area. The Virginia Institute of Marine Science was asked by NUS Corporation to conduct a surface circulation study to assemble the characteristics of the flow near Lambert Point on the Elizabeth River (Figure 3.1). This report includes a review of the previous work in the area, a description of the particular experiments performed, and an interpretation of the data in terms of surface circulation. Several small oil slicks were incidentally observed during the experiments and their behavior has been discussed in relation to the observed surface circulation