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9篇 您的检索式:作者名="Dipankar Banerjee"
    题名 作者 年代 出处 被引量
1Plasma Heating Induced by Tadpole-like Downflows in the Flaring Solar Corona显示文摘As one of the most spectacular energy release events in the solar system,solar flares are generally powered by magnetic reconnection in the solar corona.As a result of the re-arrangement of magnetic field topology after the reconnection process,a series of new looplike magnetic structures are often formed and are known as flare loops.A hot diffuse region,consisting of around 5–10 MK plasma,is also observed above the loops and is called a supra-arcade fan.Often,dark,tadpole-like structures are seen to descend through the bright supra-arcade fans.It remains unclear what role these so-called supra-arcade downflows(SADs)play in heating the flaring coronal plasma.Here we show a unique flare observation,where many SADs collide with the flare loops and strongly heat the loops to a temperature of 10–20 MK.Several of these interactions generate clear signatures of quasi-periodic enhancement in the full-Sun-integrated soft X-ray emission,providing an alternative interpretation for quasi-periodic pulsations that are commonly observed during solar and stellar flares.Tanmoy Samanta Hui Tian Bin Chen Katharine KReeves Mark C.M.Cheung Angelos Vourlidas Dipankar Banerjee 2021The Innovation2021,2,1:3
2Perspectives on Titanium Science and Technology显示文摘Dipankar Banerjee J.C. Williams 2013Acta Materialia2013,,3:3
3Perspectives on titaniumscience and technology 显示文摘Dipankar Banerjee Williams J C 2013Acta Materialia2013,61,:1
4MHD Seismology of a loop-like filament tube by observed kink waves显示文摘We report and analyze observational evidence of global kink oscillations in a solar filament as observed in Ha by instruments administered by National Solar Observatory(NSO)/Global Oscillation Network Group(GONG).An M 1.1-class flare in active region(AR) 11692 occurred on 2013 March 15 and induced a global kink mode in the filament lying towards the southwest of AR 11692.We find periods of about 61-67 minutes and damping times of 92-117 minutes at positions of three vertical slices chosen in and around the filament apex.We find that the waves are damped.From the observed period of the global kink mode and damping timescale using the theory of resonant absorption,we perform prominence seismology.We estimate a lower cut-off value for the inhomogeneity length scale to be around 0.34-0.44 times the radius of the filament cross-section.Vaibhav Pant Abhishek K Srivastava Dipankar Banerjee Marcel Goossens Peng-Fei Chen Navin Chandra Joshi Yu-Hao Zhou 2015Research in Astronomy and Astrophysics2015,15,10:1
5Perspectives on titanium science and tectmology显示文摘BANERJEE DIPANKAR WILLIAMS J C 2013Acta Materialia2013,61,3:1
6Clinical studies on the effect of Neem ( Azadirachta indica ) bark extract on gastric secretion and gastroduodenal ulcer显示文摘Uday Bandyopadhyay Kaushik Biswas Arnab Sengupta Puspa Moitra Prodip Dutta Dipankar Sarkar Pratip Debnath Chayan K. Ganguly Ranajit K. Banerjee 2004Life Sciences2004,,24:1
7Propagating disturbances along a coronal loop from simultaneous EUV imaging and spectroscopic observations显示文摘Propagating disturbances(PDs) were studied along an active region loop using simultaneous imaging and spectroscopy. An image sequence recorded in the Fe Ⅸ/Fe X 171  channel, from TRACE and spectral data in the Si Ⅻ 520.6  line obtained from CDS/SOHO, are analyzed. A space-time map constructed from the TRACE image sequence shows the presence of PDs close to the loop foot point propagating with an apparent speed of 39 km s-1. The periodicity was found to be 5.4 min.The corresponding spectroscopic data from CDS, at a location away from the foot point, show oscillations in all three line parameters roughly at the same period. At locations farther from the foot point, the line width oscillation seems to disappear while the Doppler velocity oscillation becomes prominent. We attribute this to the signature of propagating slow waves that get affected by flows/other events close to the foot point. Spectral line profiles do not show much asymmetry, however, it is difficult to infer anything due to the broadened Gaussian shape of the CDS line profiles.Ajanta Datta S.Krishna Prasad Dipankar Banerjee 2015Research in Astronomy and Astrophysics2015,15,7:0
8Propagating disturbances along fan-like coronal loops in an active region显示文摘Propagating disturbances are often observed in active region fan-like coronal loops. They were thought to be due to slow mode magnetohydrodynamic waves based on some of the observed properties. However, recent studies involving spectroscopy indicate that they could be due to high speed quasi-periodic upflows which are difficult to distinguish from upward propagating slow waves. In this context, we have studied a fan loop structure in the active region AR 11465 using simultaneous spectroscopic and imaging observations from the Extreme Ultraviolet Imaging Spectrometer onboard Hinode and Atmospheric Imaging Assembly onboard Solar Dynamics Observatory. Analysis of the data shows significant oscillations at different locations. We explore the variations in different line parameters to determine whether the waves or flows could cause these oscillations to improve the current understanding of the nature of these disturbances.Sudip Mandal Tanmoy Samanta Dipankar Banerjee S.Krishna Prasad Luca Teriaca 2015Research in Astronomy and Astrophysics2015,15,11:0
9Early stage squamous cell carcinoma of the tonsil presenting with multiple organ metastases including skin and brain after successful local treatment显示文摘Early stage carcinoma of the tonsil is curable,and the incidence of systemic metastasis is very low and central nervous system involvement is very rare.A patient diagnosed with early stage tonsillar carcinoma treated with chemoradiation was followed by brachytherapy boost.One and half years after completion of treatment,the patient presented with disseminated metastasis to the skin,lung,liver,bone,and brain.He had all favorable prognostic parameters except being a young adult.Susovan Banerjee Dipankar Kundu Mukti Mukherjee Pradip Kumar Maiti 2015Journal of Cancer Metastasis and Treatment2015,1,1:0
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