Confirmation of the 62 Day X-Ray Periodicity from M82

Using 400 days of new X-ray monitoring of M82, we confirm the 62 day periodicity previously reported. In the full data set spanning 1124 days, we find a period of 62.0 +/- 0.3 days and a coherence, Q = 22.3, that is consistent with a strictly periodic signal. We estimate that the probability of chance occurrence of our observed signal is 6E-7. The light curve folded at this period is roughly sinusoidal and has a peak to peak amplitude of (0.99 +/- 0.10) x 10^-11 erg cm^-2 s^-1. Confirmation of the periodicity strengthens our previous suggestion that the 62 day modulation is due to orbital motion within an X-ray binary.Comment: 4 pages, to appear in Ap

Spin current through an ESR quantum dot: A real-time study

The spin transport in a strongly interacting spin-pump nano-device is studied using the time-dependent variational-matrix-product-state (VMPS) approach. The precession magnetic field generates a dissipationless spin current through the quantum dot. We compute the real time spin current away from the equilibrium condition. Both transient and stationary states are reached in the simulation. The essentially exact results are compared with those from the Hartree-Fock approximation (HFA). It is found that correlation effect on the physical quantities at quasi-steady state are captured well by the HFA for small interaction strength. However the HFA misses many features in the real time dynamics. Results reported here may shed light on the understanding of the ultra-fast processes as well as the interplay of the non-equilibrium and strongly correlated effect in the transport properties.Comment: 5 pages, 5 figure

Sexual Dysfunction among Latino men and women with poorly controlled diabetes

Latinos are the largest minority population in the United States and are diagnosed with diabetes at nearly twice the rate of non-Hispanic whites. Latinos not only suffer disproportionately from diabetes but also from diabetes related complications, including sexual dysfunction. Much of the existing literature on sexual dysfunction among Latinos with diabetes has focused on erectile dysfunction (ED). There is a dearth of information on sexual functioning among Latina women with diabetes or information on both genders in other sexual domains. Our study examined the prevalence of sexual dysfunction among a cohort of 106 poorly controlled Latino diabetics in South Florida who participated in the Miami Healthy Heart Initiative, an NIH/NLBI sponsored clinical trial addressing diabetes management among Latinos. We explored gender differences in various domains of sexual health and examined the role of poor glycemic control and depression on sexual dysfunction. A large proportion of both genders in our sample met the criteria for sexual dysfunction though females exhibited a greater prevalence than males. Depression affected more than one third of our sample, but we did not find any significant associations between sexual dysfunction and depression. We also did not find a linear correlation between glycemic control and sexual dysfunction. We concluded that interventions are needed to address high rates of sexual dysfunction among Latinos with diabetes with particular emphasis on Latina women, who were much more likely than men to report problems with desire and other areas of sexual functioning. Until effective pharmacologic agents to improve desire among women with diabetes become available, clinicians caring for this population should consider behavioral approaches that may limit the impact of sexual dysfunction