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Toward accurate polarization estimation in nanoscopic systems [article]

Sambit Mohapatra, Wolfgang Weber, Martin Bowen, Samy Boukari, Victor Da Costa
2022 arXiv   pre-print
The nanoscopic characterization of ferroelectric thin films is crucial from their device application point of view. Standard characterization techniques are based on detecting the nanoscopic charge compensation current (switching current) caused by the polarization reversal in the ferroelectric. Owing to various surface and bulk limited mechanisms, leakage currents commonly appear during such measurements, which are frequently subtracted using the device I-V characteristic by employing
more » ... up-negative-down (PUND) measurement scheme. By performing nanoscopic switching current measurements on a commonly used ferroelectric, BiFeO3, we show that such characterization methods may be prone to large errors in the polarization estimation on ferro-resistive samples, due to current background subtraction issues. Especially, when ferro-resistive behavior is associated with the polarization reversal of the ferroelectric thin film, background current subtraction is not accurate due to the mismatch of the I-V characteristics for the two polarization states. We show instead that removing the background current by an asymmetric least squares subtraction method, though not perfect, gives a much better estimation of the ferroelectric properties of the sample under study.
arXiv:2203.06157v1 fatcat:as5yfpbkarcztb2mjxcc3g5emq

Renal Vein Thrombosis in Idiopathic Thrombocytopenic Purpura

Subodh Kumar Das, Debashis Routray, Pradeep Narayan Sahoo, Sukanto Kishore Das, Sambit K Mohanty
2020 Journal of Clinical and Diagnostic Research  
Subodh Kumar daS 1 , debaShiS routray 2 , PradeeP NarayaN Sahoo 3 , SuKaNto KiShore daS 4 , Sambit K mohaNty 5 ABStRACt [table/Fig-1]: Computed tomography abdomen showing thrombus in the left renal  ... 
doi:10.7860/jcdr/2020/43286.13540 fatcat:nnhf3dctybdgpihpzsx3ss2yay

PROCESSO DA CONSTITUIÇÃO DA FRONTEIRA E CULTURA ETNICA ENTRE A COMUNIDADE FULA E MANDINGA EM GUINÉ-BISSAU

Sambite Santos Cabi, Fernando José Martins
2020 Revista Alamedas. Revista eletrônica do NDP  
A análise será desenvolvida a partir da convivência e da relação do autor com o conflito envolvendo território e o processo de constituição étnica da identidade Fula e Mandiga.  ...  O presente artigo tem o objetivo de abordar os processos de constituição da fronteira na identidade cultural e tradicional guineense (Guiné-Bissau), especificamente das etnias Fula e Mandiga.  ...  da organização social.  ... 
doi:10.48075/ra.v8i1.23828 fatcat:ulqi5fdmcfax7mmq3s7krbjble

Literatura de Resistência: A Noite da Espera de Milton Hatoum

Liz Basso Antunes de Oliveira, Sambite Santos Cabi, Josiele Kaminski Corso Ozelame
2020 Literatura, história e memória  
na obra A noite da espera de Hatoum, o movimento interno à literatura, que provoca o ato de resistir.  ...  Além disso, no que diz respeito a ditadura militar recorreu-se principalmente das perspectivas de Nepomuceno (2018) e Bussunda (2019).  ...  E um ponto era genuíno: o reconhecimento da força da música popular entre nós.  ... 
doi:10.48075/rlhm.v16i27.24514 fatcat:dpcxnalvzbfffljkblgt47jqtu

Hyalohyphomycosis: an unusual presentation and review of literature

Shukla Das, Rumpa Saha, Sambit Nath Bhattacharya, Kiran Mishra, Sajad Ahmad Dar
2010 Indian Journal of Medical Specialities  
Indian Journal of Medical Specialities, Vol. 1, No. 2, Jul -Dec 2010 Shukla Das and others  ... 
doi:10.7713/ijms.2010.0030 fatcat:7vtvsh64bjfvvbshlkm4avutee

Robust ferroelectric properties of organic Croconic Acid films grown on spintronically relevant substrates [article]

Sambit Mohapatra, Victor Da Costa, Garen Avedissian, Jacek Arabski, Wolfgang Weber, Martin Bowen, Samy Boukari
2020 arXiv   pre-print
Figure 6 :Figure S1 : 6S1 Supplementary material forRobust ferroelectric properties of organic Croconic Acid films grown on spintronically relevantSambit Mohapatra a* , Victor Da Costa a , Garen Avedissian  ... 
arXiv:2004.04592v1 fatcat:giplmvwk2fdyxoeytgjhaqgytm

Data on vildagliptin and vildagliptin plus metformin combination in type-2 diabetes mellitus management

Sambit Das, Endeavour Clinics, Bhubaneswar, India
2021 Bioinformation  
It is of interest to evaluate the clinical effectiveness and safety of vildagliptin as monotherapy and combination therapy of vildagliptin and metformin for the management of type 2 diabetes mellitus (T2DM) patients in Indian settings. The study included patients with T2DM (aged >18 years) receiving vildagliptin monotherapy and vildagliptin in combination with metformin therapy of various strengths. Data related to demographics, risk factors, medical history, glycated hemoglobin (HbA1c) levels,
more » ... and medical therapies were retrieved from medical records. Out of 9678 patients (median age, 52.0 years), 59.1% were men. A combination of vildagliptin and metformin (50/500 mg) was the most commonly used therapy (54.8%), and the median duration of therapy was 24.0 months. The predominant reason for selecting vildagliptin therapy was to improve HbA1c levels (87.8%). A total of 87.5% of patients required dosage up-titration. Vildagliptin therapy was used in patients with T2DM and associated complications (peripheral neuropathy, CAD, nephropathy, retinopathy, autonomous neuropathy, stroke/TIA, and peripheral artery disease). Among 5175 patients who experienced body weight changes, a majority of patients had lost weight (68.6%). The target glycemic control was achieved in 95.3% of patients. The mean HbA1c levels were significantly decreased post-treatment (mean change: 1.34%; p<0.001). Adverse events were reported in 0.4% of patients. Physicians rated the majority of patients as good to excellent on the global evaluation of efficacy and tolerability scale (98.9%, each). Vildagliptin with or without metformin was an effective therapy in reducing HbA1c helps in achieving target glycemic control, and was well-tolerated in Indian patients with T2DM continuum.
doi:10.6026/97320630017413 pmid:34092962 pmcid:PMC8131578 fatcat:5dg2dkegozcvdkaf3wzdwb5qfm

Eliminating fine grained timers in Xen

Bhanu C. Vattikonda, Sambit Das, Hovav Shacham
2011 Proceedings of the 3rd ACM workshop on Cloud computing security workshop - CCSW '11  
The move to "infrastructure-as-a-service" cloud computing brings with it a new risk: cross-virtual machine side channels through shared physical resources such as the L2 cache. One approach to this risk is to rewrite sensitive code to eliminate the signal. In this paper we consider another approach: weakening malicious virtual machines' ability to receive the signal by eliminating fine-grained timers. Such "fuzzy time" was implemented in 1991 in the VAX security kernel, but it was not clearly
more » ... plicabile to modern virtual machine managers such as Xen on platforms such as the x86, which exports a cycle counter through the RDTSC instruction. In this paper, we demonstrate that it is possible to modify the RDTSC instruction on Xen-virtualized x86 machines, making the timer provided by this instruction substantially more coarse. We perform a thorough evaluation of the impact of modifying this timer on the usability of the system, and we evaluate the limiting point of the timer coarseness. Our findings open the way to a specific research program for mitigating cloud computing side channels through fuzzy time: (1) What other sources of fine-grained time are available to a malicious VM, and is it possible to degrade them? (2) What distribution of noise should be introduced to RDTSC and other timing signals to maximize the effect on malicious VMs while minimizing the effect on legitimate ones? (3) What timing resolution is actually needed to make use of L2 cache side channels?
doi:10.1145/2046660.2046671 dblp:conf/ccs/VattikondaDS11 fatcat:zeq4x35qlbhutnmfau7dzbmffy

NetBump

Mohammad Al-Fares, Rishi Kapoor, George Porter, Sambit Das, Hakim Weatherspoon, Balaji Prabhakar, Amin Vahdat
2012 Proceedings of the eighth ACM/IEEE symposium on Architectures for networking and communications systems - ANCS '12  
Engineering large-scale data center applications built from thousands of commodity nodes requires both an underlying network that supports a wide variety of traffic demands, and low latency at microsecond timescales. Many ideas for adding innovative functionality to networks, especially active queue management strategies, require either modifying packets or performing alternative queuing to packets in-flight on the data plane. However, configuring packet queuing, marking, and dropping is
more » ... ging, since buffering in commercial switches and routers is not programmable. In this work, we present NetBump, a platform for experimenting with, evaluating, and deploying a wide variety of active queue management strategies to network data planes with minimal intrusiveness and at low latency. NetBump leaves existing switches and endhosts unmodified by acting as a "bump on the wire, " examining, marking, and forwarding packets at line rate in tens of microseconds to implement a variety of virtual active queuing disciplines and congestion control mechanisms. We describe the design of NetBump, and use it to implement several network functions and congestion control protocols including DCTCP and 802.1Qau quantized congestion notification.
doi:10.1145/2396556.2396567 dblp:conf/ancs/Al-FaresKPDWPV12 fatcat:jci7irpqc5e57ibctwpcqjvvdi

Adrenal histoplasmosis: unusual presentations

Anil Bhansali, Sambit Das, Pinaki Dutta, Rama Walia, Uma Nahar, S K Singh, P Vellayutham, Shanmugasundar Gopal
2012 Journal of Association of Physicians of India  
Das 1 , Pinaki Dutta 1 , Rama Walia 1 , Uma Nahar ** , SK Singh * , P Vellayutham 1 , Shanmugasundar Gopal 1 mass index (bMI) of 23.2 kg/m 2 , blood pressure of 130/80 mm Hg without any postural drop.  ...  presented with anorexia, weight loss, easy fatiguability and intermittent low grade fever of 2 months duration. on examination, he had body Adrenal Histoplasmosis : Unusual Presentations Anil Bhansali 1 , Sambit  ... 
pmid:23777028 fatcat:22lhmycijrgihjqwm6grrofb4m

Parameter Estimation and Speed Control of PMDC Servo Motor Using Method of Time Moments

Prasanta SARKAR, Sagarika PAL, Swadhin Sambit DAS
2010 Sensors & Transducers  
Identification and Speed Control of PMDC Motor using Time Moments Prasanta Sarkar, Sagarika Pal, Swadhin Sambit Das........................................................................ 151 Identification  ...  Das........................................................................ 162 Determination of the Region of Stabilizing Controller Parameters of Polytopic Polynomials I.  ... 
doaj:fc25805d13644b208e06512324088de7 fatcat:k3rfyispzjehni3zjzwg7at2yu

A Review of Edible Packaging for Foods

Pooja Saklani Pooja Saklani, Siddh nath, Sambit Kishor Das, Shiv Mohan Singh
2019 International Journal of Current Microbiology and Applied Sciences  
doi:10.20546/ijcmas.2019.807.359 fatcat:b3ogxmiiijdrpc3wk6zjnq5544

Diabetes and COVID-19: A Review

Arjun Baidya, Santosh Kumar Singh, Sarita Bajaj, Abdul Hamid Zargar, Parminder Singh, Sambit Das, Anand Shankar
2020 Journal of the ASEAN Federation of Endocrine Societies  
Coronavirus Disease 2019 (COVID-19) is an emerging disease and since its first identification in Wuhan, China, in December 2019, there has been a rapid increase in cases and deaths across the world. COVID-19 has been shown to have an immense impact in infected persons with diabetes, worsening their outcome, especially in elderly, smokers, obese, those having CVD, CKD, poor glycemic control and long duration of diabetes. In this review we summarize the current understanding of 'the impact of
more » ... D-19 on diabetes and discusses the pathophysiological mechanisms and management of diabetes and its complication in this scenario.
doi:10.15605/jafes.035.01.06 pmid:33442168 pmcid:PMC7784172 fatcat:kn2crb7ifjfapl5bkfptmlth5a

Phosphoinositides and Phospholipase C Signalling in Plant Stress Response: A Revisit

Priyanka Das, Sambit Datta, Milan Samanta, Abhishek Mukherjee, Arun Lahiri Majumder
2017 Proceedings of the Indian National Science Academy  
have been recognized in plants, which include phosphoinositide specific phospholipase C, which primarily hydrolyzes phosphoinositides and the nonspecific phospholipase C which hydrolyzes common Priyanka Das  ... 
doi:10.16943/ptinsa/2017/49223 fatcat:o7yt2gadczdvphgv4yrgk2mf6q

Understanding the early cold response mechanism in IR64 indica rice variety through comparative transcriptome analysis

Pratiti Dasgupta, Abhishek Das, Sambit Datta, Ishani Banerjee, Sucheta Tripathy, Shubho Chaudhuri
2020 BMC Genomics  
Tripathy and Abhishek Das would like to acknowledge CSIR-IICB for infrastructure for data analysis.  ...  Abhishek Das sincerely acknowledges ICMR; Government of India, for his fellowship.  ... 
doi:10.1186/s12864-020-06841-2 pmid:32580699 fatcat:26cdgbxlffbshhoflmqktsprme
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