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Creators/Authors contains: "Sandeep, K"

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  1. Abstract We analyzed the inverse Evershed flow (IEF) around a sunspot (NOAA 13131) using line scan observations in the Fei6173 Å and Caii8542 Å spectral lines, complemented with data products from the Solar Dynamics Observatory's Helioseismic and Magnetic Imager. Line-of-sight (LOS) velocities were obtained for different bisector levels in both spectral lines. Additionally, the Caii8542 Å spectra were inverted using the Non-LTE Inversion COde using the Lorien Engine (or NICOLE) to retrieve the temperature and velocity stratification over different layers of the lower solar atmosphere. The IEF evolved dynamically in time and with height in the solar atmosphere. The flow speed associated with the IEF channels was on the order of 8 km s−1in the upper chromosphere, which decreased in the lower layers of the atmosphere. The flow was traced to the lower chromosphere in LOS velocity maps and the upper photosphere in intensity images. The temperature enhancements associated with the IEF were up to 300 K at logτ≈ −2 and 800 K at logτ≈ −6 near the end point of one channel. The overall appearance of the flow along the IEF channels seems consistent with a siphon flow model. We investigated the association of the IEF with the photospheric Evershed flow, but no obvious connection was found in our analysis. We also analyzed the effect of the IEF on moving magnetic features (MMF) selected near and away from IEF channels. MMFs moved radially outward with velocities in the 0.2–1 km s−1range, with no apparent association with the IEF. 
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    Free, publicly-accessible full text available May 8, 2026
  2. This peer-reviewed publication documents the development of Cr/4H-SiC Schottky barrier diodes with high built-in potential (2.2 V), Schottky barrier height (1.14 eV), and exceptional energy resolution (0.5% for 5.486 MeV alpha particles) and compares them with those obtained from devices with conventional metals such as Ni, Mo, and Pd. This work directly corresponds to Tasks 1 and 2 of the project, particularly in exploring alternative metal contacts for enhanced device performance under extreme conditions. It also provides key performance benchmarks for evaluating contact properties that will feed into Task 4, where charge transport behavior is analyzed under irradiation. 
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    Free, publicly-accessible full text available April 1, 2026
  3. Free, publicly-accessible full text available November 5, 2025
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    Multiple myeloma (MM) is a plasma cells neoplasm. The overexpression of Bcl-2 family proteins, particularly myeloid cell leukemia 1 (Mcl-1), plays a critical role in the pathogenesis of MM. The overexpression of Mcl-1 is associated with drug resistance and overall poor prognosis of MM. Thus, inhibition of the Mcl-1 protein considered as a therapeutic strategy to kill the myeloma cells. Over the last decade, the development of selective Mcl-1 inhibitors has seen remarkable advancement. This review presents the critical role of Mcl-1 in the progression of MM, the most prominent BH3 mimetic and semi-BH3 mimetic that selectively inhibit Mcl-1, and could be used as single agent or combined with existing therapies. 
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