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2,852 results on '"Levin, S"'

25. Comparison of Four Predictive Scores for Cardiovascular Risk in Mexican People with HIV.

Author

Oliva-Sánchez, P.F., Landeros-López, S., Rosas-Dossetti, M.M., Grobeisen-Levin, S., Islas-Martínez, J.A., Aznar-Guerra, D., Valdez-Celiz, A.P., and Soto-Ramírez, L.

Abstract

Persons with HIV (PWH) face an increased risk of cardiovascular events due to immune activation, comorbidities, and certain antiretrovirals (ARVs). However, the current cardiovascular risk (CVR) scores are not specifically directed toward PWH. This study aimed to assess the agreement between different predictive CVR scores and explore their relationship with clinical and demographic data in Mexican PWH. A descriptive cross-sectional analysis was conducted in 200 PWH with a mean age of 42 years who were treated at a Mexican urban center from 2017 to 2018. The majority (83%) was on ARV treatment and 79.5% had undetectable viral loads (VLs). Moderate- to high-risk scores were infrequent, with Framingham Risk Score for Hard Coronary Heart Disease scores showing higher values, with very low concordance among all scores. Logistic regression analysis revealed significant associations between the CVR scores and the initial recorded VL, CD4 cell count, and elevated triglyceride levels. However, no associations were found with measures such as body mass index or abdominal circumference. Treatment with integrase strand transfer inhibitors (INSTIs), particularly first-generation inhibitors, showed strong associations with all predictive scores, notably ASCVD (odds ratio = 7.03, 95% confidence interval 1.67–29.64). The poor concordance among the CVR scores in PWH highlights the need for a specific score that considers comorbidities and ARV drugs. Despite the relatively young age of the participants, significant correlations were observed between INSTI use, initial VL, CD4 cell count, and triglyceride levels, which are factors not considered in the existing risk scores. Regardless of the actual value of the scores, screening for CVR in PWH is recommended. [ABSTRACT FROM AUTHOR]

Published
2024
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26. The Scattering Problem of Three One-Dimensional Short-Range Quantum Particles Involving Bound States in Pair Subsystems. The Coordinate Asymptotics of the Resolvent Kernel and of the Eigenfunctions of the Absolutely Continuous Spectrum

Author

Baibulov, I. V., Budylin, A. M., and Levin, S. B.

Subjects
Mathematics
Abstract

In the present work, we consider the scattering problem of three one-dimensional quantum particles of equal mass interacting by pair finite potentials such that each pair subsystem permits a bound state. We study the limit values of the Schrödinger operator resolvent integral kernel as the spectral parameter approaches the positive semiaxis, which allows us to construct the asymptotics of eigenfunctions of the absolutely continuous spectrum., Author(s): I. V. Baibulov [sup.1], A. M. Budylin [sup.1], S. B. Levin [sup.1] Author Affiliations: (1) grid.15447.33, 0000 0001 2289 6897, St.Petersburg State University, , St.Petersburg, Russia References 1. Budylin, [...]

Published
2021
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34. Juno observations of spot structures and a split tail in Io-induced aurorae on Jupiter

Author

Mura, A., Adriani, A., Connerney, J. E. P., Bolton, S., Altieri, F., Bagenal, F., Bonfond, B., Dinelli, B. M., Gérard, J.-C., Greathouse, T., Grodent, D., Levin, S., Mauk, B., Moriconi, M. L., Saur, J., Waite, J. H., Amoroso, M., Cicchetti, A., Fabiano, F., Filacchione, G., Grassi, D., Migliorini, A., Noschese, R., Olivieri, A., Piccioni, G., Plainaki, C., Sindoni, G., Sordini, R., Tosi, F., and Turrini, D.

Published
2018

45. Jupiter’s interior and deep atmosphere : The initial pole-to-pole passes with the Juno spacecraft

Author

Bolton, S. J., Adriani, A., Adumitroaie, V., Allison, M., Anderson, J., Atreya, S., Bloxham, J., Brown, S., Connerney, J. E. P., DeJong, E., Folkner, W., Gautier, D., Grassi, D., Gulkis, S., Guillot, T., Hansen, C., Hubbard, W. B., Iess, L., Ingersoll, A., Janssen, M., Jorgensen, J., Kaspi, Y., Levin, S. M., Li, C., Lunine, J., Miguel, Y., Mura, A., Orton, G., Owen, T., Ravine, M., Smith, E., Steffes, P., Stone, E., Stevenson, D., Thorne, R., Waite, J., Durante, D., Ebert, R. W., Greathouse, T. K., Hue, V., Parisi, M., Szalay, J. R., and Wilson, R.

Published
2017

47. Logistics of oil cargo transportation by rail.

Author

Levin, B. A., Levin, S. B., Astafyev, A. V., Solop, I. A., and Denisenko, T. V.

Subjects
*RAILROADS, *FREIGHT & freightage, *TRANSPORTATION buildings, *LOADING & unloading, *WAGONS, *PETROLEUM
Abstract

Oil cargoes account for a significant share of the railways' transportation structure. The tank-car fleet is owned by commercial entities of various forms of ownership. Small transport companies merge into larger ones to increase the efficiency of wagon use through joint operation, which reduces the mileage between loading and unloading points and costs, because wagon owners pay the infrastructure owner, according to the current Transport Rules and Tariff Guidelines, for both loaded and empty mileage. Literature sources are analysed, where the questions of improving the system of organisation and technology of cargo transportations and building efficient logistic chains of delivery are considered. The transport and technological schemes of oil cargo delivery by railway on the example of a transport company are considered. Pricing and tariffing issues of these transportations have been considered; economic efficiency parameters have been determined. A triangular scheme of laden and empty wagons movement is offered, which allows to decrease rent payments for usage of tank-wagons, to reduce empty run of wagons, what is actual in conditions of insufficient carrying capacity of railway communications. Advantages and disadvantages of the scheme application are evaluated. Analytical methods, methods technical and economical comparison between variants and statistical modelling are used. [ABSTRACT FROM AUTHOR]

Published
2023
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48. Jupiters atmospheric jet streams extend thousands of kilometres deep

Author

Kaspi, Y., Galanti, E., Hubbard, W. B., Stevenson, D. J., Bolton, S. J., Iess, L., Guillot, T., Bloxham, J., Connerney, J. E. P., Cao, H., Durante, D., Folkner, W. M., Helled, R., Ingersoll, A. P., Levin, S. M., Lunine, J. I., Miguel, Y., Militzer, B., Parisi, M., and Wahl, S. M.

Subjects
Winds -- Natural history, Jovian atmosphere -- Natural history, Environmental issues, Science and technology, Zoology and wildlife conservation
Abstract

Author(s): Y. Kaspi (corresponding author) [1]; E. Galanti [1]; W. B. Hubbard [2]; D. J. Stevenson [3]; S. J. Bolton [4]; L. Iess [5]; T. Guillot [6]; J. Bloxham [7]; [...]

Published
2018
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49. A suppression of differential rotation in Jupiters deep interior

Author

Guillot, T., Miguel, Y., Militzer, B., Hubbard, W. B., Kaspi, Y., Galanti, E., Cao, H., Helled, R., Wahl, S. M., Iess, L., Folkner, W. M., Stevenson, D. J., Lunine, J. I., Reese, D. R., Biekman, A., Parisi, M., Durante, D., Connerney, J. E. P., Levin, S. M., and Bolton, S. J.

Subjects
Gravity (Force) -- Observations, Rotation (Motion) -- Observations, Jupiter (Planet) -- Observations, Planetary atmospheres -- Observations, Environmental issues, Science and technology, Zoology and wildlife conservation
Abstract

Author(s): T. Guillot (corresponding author) [1]; Y. Miguel [1, 2]; B. Militzer [3]; W. B. Hubbard [4]; Y. Kaspi [5]; E. Galanti [5]; H. Cao [6, 7]; R. Helled [8]; [...]

Published
2018
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