Rotating and Orbiting Strings in Dp-brane background

We probe the open fundamental strings in Dp-brane (p=1, 3, 5) backgrounds and find new classes of rotating and orbiting string solutions. We show that for various worldsheet embedding ansatz we get solutions of the string equations of motion that correspond to the well known giant magnon and single spikes, in addition to few new solutions corresponding to the orbiting strings. We make a systematic study of both rigidly rotating and orbiting strings in D1, D3 and D5-brane backgrounds.Comment: 27 page

On multi-spin classical strings with NS-NS flux

We study multi spin semiclassical strings in $AdS_3\times S^3 \times T^4$ background supported by a mixture of Neveu-Schwarz-Neveu-Schwarz (NS-NS) and Ramond-Ramond (R-R) fluxes. This `mixed flux' background has been recently proved to be classically integrable. We start with a particular rigidly spinning fundamental string in $AdS_3\times S^1$ coupled to the NS-NS flux and classify the possible profiles. We also find out how the scaling relation among the energy and angular momenta of such a string changes due to presence of these fluxes. We emphasize on pure NS-NS flux case and discuss the fate of such solutions in that limit.Comment: 22 pages, 4 figure

Semiclassical Strings in Supergravity PFT

Puff Field Theory (PFT) is an example of a non-local field theory which arises from a novel embedding of D-branes in Melvin universe. We study several rotating and pulsating string solutions of the F-string equations of motion in the supergravity dual of the PFT. Further, we find a PP-wave geometry from this nonlocal spacetime by applying a Penrose limit and comment on its similarity with the maximally supersymmetric PP-wave background.Comment: 21 pages, added clarification

イネの光形態形成反応 : 突然変異体の分離と解析

博士(理学)大阪市立大

'How shall we survive': a qualitative study of women's experiences following denial of menstrual regulation (MR) services in Bangladesh.

BackgroundAbout one quarter of women in Bangladesh are denied menstrual regulation (MR) due to advanced gestation [J Fam Plann Reprod Health Care 41(3):161-163, 2015, Issues Brief (Alan Guttmacher Inst) (3):1-8, 2012]. Little is known about barriers to MR services, and whether women denied MR seek abortion elsewhere, self-induce, or continue the pregnancy.MethodsAfter obtaining authorization from four health facilities in Bangladesh, we recruited eligible and interested women in to the study and requested informed consent for study participation. We conducted in-depth interviews with 20 women denied MR from four facilities in four districts in Bangladesh. Interviews were translated and transcribed, and the transcripts were analyzed by two researchers through an iterative process using a qualitative content analysis approach.ResultsOf those interviewed, 12 women sought abortion elsewhere and eight of these women were successful; four women who sought subsequent services were denied again. Two of the eight women who subsequently terminated their pregnancies suffered from complications. None of the participants were aware of the legal gestational limit for government-approved MR services. Given that all participants were initially denied services because they were beyond the legal gestational limit for MR and there were no reported risks to any of the mothers' health, we presume that the eight terminations performed subsequently were done illegally.ConclusionsBarriers to seeking safe MR services need to be addressed to reduce utilization of potentially unsafe alternative abortion services and to improve women's health and well being in Bangladesh. Findings from this study indicate a need to raise awareness about legal MR services; provide information to women on where, how and when they can access these services; train more MR providers; improve the quality and safety of second trimester services; and strengthen campaigns to educate women about contraception and pregnancy risk throughout the reproductive lifespan to prevent unintended pregnancies

N spike D-strings in AdS Space with mixed flux

We use Dirac-Born-Infeld action to study the spinning D-string in $AdS_3$ background in the presence of both NS-NS and RR fluxes. We compute the scaling relation between the energy (E) and spin (S) in the `long string limit'. The energy of these spiky string is found to be a function of spin with the leading logarithmic behaviour and the scaling relation appears to be independent of the amount of flux present. We further discuss folded D-string solutions in $AdS_3$ background with pure NS-NS and R-R fluxes.Comment: 27 pages, 12 figure

Pulsating strings in I-brane background

We study pulsating strings both on a single stack of NS5-branes and two orthogonal stacks of NS5-branes (the so called I-brane) by using the Polyakov form of the fundamental string action. For the I-brane background, by using a symmetry that decouples the two spheres from the flat geometry, we study pulsating solutions of the string when it pulsates on both the spheres independently and simultaneously. We finally derive the energy of pulsating strings as a function of adiabatic invariant oscillation number in these cases and studied some limiting cases in detail.Comment: 24 pages, 6 figure