Influence of Fiber Packing on the Deformation and Damage Development in Fiber Reinforced Laminates during Curing

Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/140429/1/6.2014-1527.pd

The Influence of Cohesive Zone Modeling on the Stress Field and Energy Release Rates in a Cracked Elastic Body

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/83572/1/AIAA-2010-2616-483.pd

Investigation of failure mode interaction in laminated composites subjected to compression loading

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/90657/1/AIAA-2011-1792-899.pd

Optical spectroscopic and polarization properties of 2011 outburst of the recurrent nova T Pyxidis

We study the spectroscopic and ionized structural evolution of T Pyx during its 2011 outburst, and also study the variation in degree of polarization during its early phase. Optical spectroscopic data of this system obtained from day 1.28--2415.62 since discovery, and optical, broadband imaging polarimetric observations obtained from day 1.36--29.33 during the early phases of the outburst are used in the study. The physical conditions and the geometry of the ionized structure of the nova ejecta has been modelled for a few epochs using the photo-ionization code, CLOUDY in 1D and pyCloudy in 3D. The spectral evolution of the nova ejecta during its 2011 outburst is similar to that of the previous outbursts. The variation in the line profiles is seen very clearly in the early stages due to good coverage during this period. The line profiles vary from P-Cygni (narrower, deeper and sharper) to emission profiles which are broader and structured, which later become narrower and sharper in the late post-outburst phase. The average ejected mass is estimated to be $7.03\, \times\, 10^{-6}\, M_{\odot}$. The ionized structure of the ejecta is found to be a bipolar conical structure with equatorial rings, with a low inclination angle of $14.75^\circ\, \pm\, 0.65^\circ$.Comment: 14 pages, 12 figures, accepted in A&

Autoimmune thyroid disease in pregnancy

Background: Maternal thyroid dysfunction is the common endocrinological disorder during pregnancy. It is associated with adverse maternal and foetal outcomes like pre-eclampsia, GDM, preterm, IUGR and miscarriage. Objective of this study was to study the prevalence of thyroid dysfunction in women with thyroid autoimmunity and its relation with adverse maternal and foetal outcomes.Methods: It was an observational study undertaken at RRMCH from May-2013 to Oct-2013. Pregnant women were screened for thyroid dysfunction. Women with altered thyroid function tests were screened for anti TPO antibodies. Mothers with thyroid dysfunction and anti TPO antibody positive were compared with anti TPO negative mothers.Results: Study group included 1000 pregnant women, 126 women had hypothyroidism. Anti TPO antibodies were positive in 26 women. Prevalence of hypothyroidism and autoimmunity were 7.5% and 12.8% respectively. 46.2% women with hypothyroidism and thyroid autoimmunity had PE, P value <0.01, 7% had GDM with P value <0.603, 15.4% had IUGR with p value of 0.033.7, 7% women had IUD.Conclusions: Hypothyroidism and thyroid autoimmunity are common during pregnancy. They are associated with adverse maternal and foetal outcome. Screening for thyroid dysfunction and early initiation of treatment can prevent adverse maternal and fetal outcome. 

System Architecture for Low-Power Ubiquitously Connected Remote Health Monitoring Applications With Smart Transmission Mechanism

We present a novel smart transmission technique with seamless handoff mechanism to achieve ubiquitous connectivity using multiple on-chip radios targeting remote health monitoring applications. For the first time to the best of our knowledge, a system architecture for low-power ubiquitously connected multiparametric remote health monitoring system is proposed in this paper. The architecture proposed uses a generic adaptive rule engine for classifying the collected multiparametric data from patient and smartly transmit the data when only needed. The on-chip seamless handoff mechanism proposed aids for the ubiquitous connectivity with a very good energy savings by intelligent controlling of the multiple on-chip radios. The performance analysis of the proposed on-chip seamless handoff mechanism along with adaptive rule engine-based smart transmission mechanism achieves on an average of 50.39% of energy saving and 51.01% reduction in duty cycle of transmitter taken over 20 users compared with the continuous transmission. From the hardware complexity analysis made on the proposed seamless handoff controller and adaptive rule engine concludes that they require only 2082 CMOS transistors for real-time implementation

Computational modeling of failure in composite structures including uncertainties in material and geometrical properties

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/90654/1/AIAA-2011-1722-752.pd