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17 results on '"Tiwary H"'

1. Immediate “Kangaroo Mother Care” and Survival of Infants With Low Birth Weight

Author

Arya, S., Naburi, H., Kawaza, K., Newton, S., Anyabolu, C.H., Bergman, N., Rao, S.P.N., Mittal, P., Assenga, E., Gadama, L., Larsen-Reindorf, R., Kuti, O., Linnér, A., Yoshida, S., Chopra, N., Ngarina, M., Msusa, A.T., Boakye-Yiadom, A., Kuti, B.P., Morgan, B., Minckas, N., Suri, J., Moshiro, R., Samuel, ., V, Wireko-Brobby, N., Rettedal, S., Jaiswal, H.V., Sankar, M.J., Nyanor, ., I, Tiwary, H., Anand, P., Manu, A.A., Nagpal, K., Ansong, D., Saini, ., I, Aggarwal, K.C., Wadhwa, N., Bahl, R., Westrup, B., Adejuyigbe, E.A., Plange-Rhule, G., Dube, Q., Chellani, H., and Massawe, A.

Published
2021
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4. On Computing the Vertex Centroid of a Polyhedron

Author

Elbassioni, K. and Tiwary, H.

Abstract

Let $\mathcal{P}$ be an $\mathcal{H}$-polytope in $\mathbb{R}^d$ with vertex set $V$. The vertex centroid is defined as the average of the vertices in $V$. We prove that computing the vertex centroid of an $\mathcal{H}$-polytope is #P-hard. Moreover, we show that even just checking whether the vertex centroid lies in a given halfspace is already #P-hard for $\mathcal{H}$-polytopes. We also consider the problem of approximating the vertex centroid by finding a point within an $\epsilon$ distance from it and prove this problem to be #P-easy by showing that given an oracle for counting the number of vertices of an $\mathcal{H}$-polytope, one can approximate the vertex centroid in polynomial time. We also show that any algorithm approximating the vertex centroid to \emph{any} ``sufficiently'' non-trivial (for example constant) distance, can be used to construct a fully polynomial approximation scheme for approximating the centroid and also an output-sensitive polynomial algorithm for the Vertex Enumeration problem. Finally, we show that for unbounded polyhedra the vertex centroid can not be approximated to a distance of $d^{{1/2}-\delta}$ for any fixed constant $\delta>0$.

Published
2008

5. Characterization of the Vertices and Extreme Directions of the Negative Cycles Polyhedron and Hardness of Generating Vertices of 0/1-Polyhedra

Author

Boros, E., Elbassioni, K., Gurvich, V., and Tiwary, H.

Abstract

Given a graph $G=(V,E)$ and a weight function on the edges $w:E\mapsto\RR$, we consider the polyhedron $P(G,w)$ of negative-weight flows on $G$, and get a complete characterization of the vertices and extreme directions of $P(G,w)$. As a corollary, we show that, unless $P=NP$, there is no output polynomial-time algorithm to generate all the vertices of a 0/1-polyhedron. This strengthens the NP-hardness result of Khachiyan et al. (2006) for non 0/1-polyhedra, and comes in contrast with the polynomiality of vertex enumeration for 0/1-polytopes \cite{BL98} [Bussieck and L\"ubbecke (1998)].

Published
2008

16. The development of end stage renal disease in two patients with PMM2-CDG.

Author

Tiwary H, Hecht LE, Brucker WJ, Berry GT, and Rodig NM

Abstract

We report two patients with PMM2-CDG who developed end stage renal disease (ESRD). Renal abnormalities of clinical significance have only been reported in about 6% of patients with PMM2-CDG and have rarely been reported as the cause of death. Given the recurrent episodes of acute kidney injury associated with hospital admissions and the accelerated development of ESRD thereafter in our two patients, we recommend proactively involving Nephrology early in the care of these patients., Competing Interests: The authors declare that they have no conflicts of interest., (© 2022 The Authors. JIMD Reports published by John Wiley & Sons Ltd on behalf of SSIEM.)

Published
2022
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17. Immediate "Kangaroo Mother Care" and Survival of Infants with Low Birth Weight.

Author

Arya S, Naburi H, Kawaza K, Newton S, Anyabolu CH, Bergman N, Rao SPN, Mittal P, Assenga E, Gadama L, Larsen-Reindorf R, Kuti O, Linnér A, Yoshida S, Chopra N, Ngarina M, Msusa AT, Boakye-Yiadom A, Kuti BP, Morgan B, Minckas N, Suri J, Moshiro R, Samuel V, Wireko-Brobby N, Rettedal S, Jaiswal HV, Sankar MJ, Nyanor I, Tiwary H, Anand P, Manu AA, Nagpal K, Ansong D, Saini I, Aggarwal KC, Wadhwa N, Bahl R, Westrup B, Adejuyigbe EA, Plange-Rhule G, Dube Q, Chellani H, and Massawe A

Subjects
Africa South of the Sahara, Breast Feeding, Developing Countries, Female, Humans, India, Infant, Infant Mortality, Infant, Newborn, Intensive Care Units, Neonatal, Male, Time Factors, Incubators, Infant, Infant, Low Birth Weight, Kangaroo-Mother Care Method
Abstract

Background: "Kangaroo mother care," a type of newborn care involving skin-to-skin contact with the mother or other caregiver, reduces mortality in infants with low birth weight (<2.0 kg) when initiated after stabilization, but the majority of deaths occur before stabilization. The safety and efficacy of kangaroo mother care initiated soon after birth among infants with low birth weight are uncertain., Methods: We conducted a randomized, controlled trial in five hospitals in Ghana, India, Malawi, Nigeria, and Tanzania involving infants with a birth weight between 1.0 and 1.799 kg who were assigned to receive immediate kangaroo mother care (intervention) or conventional care in an incubator or a radiant warmer until their condition stabilized and kangaroo mother care thereafter (control). The primary outcomes were death in the neonatal period (the first 28 days of life) and in the first 72 hours of life., Results: A total of 3211 infants and their mothers were randomly assigned to the intervention group (1609 infants with their mothers) or the control group (1602 infants with their mothers). The median daily duration of skin-to-skin contact in the neonatal intensive care unit was 16.9 hours (interquartile range, 13.0 to 19.7) in the intervention group and 1.5 hours (interquartile range, 0.3 to 3.3) in the control group. Neonatal death occurred in the first 28 days in 191 infants in the intervention group (12.0%) and in 249 infants in the control group (15.7%) (relative risk of death, 0.75; 95% confidence interval [CI], 0.64 to 0.89; P = 0.001); neonatal death in the first 72 hours of life occurred in 74 infants in the intervention group (4.6%) and in 92 infants in the control group (5.8%) (relative risk of death, 0.77; 95% CI, 0.58 to 1.04; P = 0.09). The trial was stopped early on the recommendation of the data and safety monitoring board owing to the finding of reduced mortality among infants receiving immediate kangaroo mother care., Conclusions: Among infants with a birth weight between 1.0 and 1.799 kg, those who received immediate kangaroo mother care had lower mortality at 28 days than those who received conventional care with kangaroo mother care initiated after stabilization; the between-group difference favoring immediate kangaroo mother care at 72 hours was not significant. (Funded by the Bill and Melinda Gates Foundation; Australian New Zealand Clinical Trials Registry number, ACTRN12618001880235; Clinical Trials Registry-India number, CTRI/2018/08/015369.)., (Copyright © 2021 Massachusetts Medical Society.)

Published
2021
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