A new ensemble approach to explore stability features in turning operation on CNC lathe

Pankaj Gupta,Bhagat Singh 대한기계학회 2021 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.35 No.7

Objective of the present study is to determine an optimum range of turning parameters using merged wavelet denoising and local mean decomposition (WDLMD) technique in order to establish stable turning settings in computer numerical control (CNC) lathe. In this method, the embedded ambient noise and other disturbances in experimentally acquired chatter signals are removed using wavelet denoising (WD). Further, local mean decomposition (LMD) technique is applied on denoised signals to extract a series of product functions (PFs). Thereafter, fast Fourier transformation (FFT) of these PFs is done and then considering these FFTs, prominent PFs containing the chatter information are selected. These prominent PFs are combined to reconstruct the signal containing rich information of chatter. Finally, reconstructed signal has been explored by evaluating statistical indexes in order to extract tool chatter features and stability regimes in CNC turning. More experiments have been performed to corroborate the ascertained stability zone.

Stoichiometry dependent changes in the optical properties and nanoscale track formation of PECVD grown a-SiNx:H thin films upon 100 MeV Au8+ ion irradiation

Gupta Harsh,Ghosh Santanu,Khan Saif A.,Srivastava Himanshu,Srivastava Arvind,Srivastava Pankaj 한국물리학회 2021 Current Applied Physics Vol.24 No.-

-SiNx:H thin films of different stoichiometry grown by PECVD were subjected to irradiation by 100 MeV Au8+ ions with various fluences to understand the effect of stoichiometry on properties of thin films upon irradiation. Ellipsometry and UV–Vis study suggest the variation in the refractive index of thin films with fluence. The evolution of Hydrogen due to irradiation is quantified with the help of ERDA. RBS was probed to study the change in thin films’ composition upon irradiation, which further helps understand the change in thin films’ optical properties. Quenching of photoluminescence in the films with all stoichiometries was also observed due to ion irradiation. X-TEM images show the formation of discontinuous ion tracks of radius 2.5 nm in the film closer to silicon nitride stoichiometry. However, Si rich film does not show the clear formation of tracks. Results are explained in the framework of the Thermal spike mechanism of ion-solid interaction.

Effect of FRP Wrapping on Axial Behavior of Concrete and Cyclic Behavior of External RC Beam Column Joints

Pankaj Agarwal,Ankit Gupta,Rachanna G. Angadi 대한토목학회 2014 KSCE JOURNAL OF CIVIL ENGINEERING Vol.18 No.2

The study focuses on the effect of confinement due to transverse reinforcement and FRP jacketing on the axial behavior ofconcrete and external beam-column joints (i.e., T-joints) before and after retrofitting. The effectiveness of confinement is firstlyevaluated by stress - strain behavior of square prism specimen under pure axial compression. These specimens are prepared withdifferent amount of transverse reinforcement and FRP wraps (number of layers). Secondly, the cyclic tests are also carried out onbeam-column joint specimens, with two different configurations of reinforcement detailing and retrofitted by externally bondedFRP wrapping. One specimen is designed to comply with gravity load design codes and the other with detailing according toIndian Standards. GFRP wrapping is used for retrofitting of damaged joints with epoxy resin. GFRP jacketing comes out to be aneffective technique to regain the strength and stiffness of damaged joints. Also significant gain in strength and strain is observedunder pure axial compression.

Radiative and seesaw threshold corrections to the _{S 3} symmetric neutrino mass matrix

Gupta, Shivani,Kim, C.S.,Sharma, Pankaj North-Holland Pub. Co 2015 Physics letters. Section B Vol.740 No.-

<P><B>Abstract</B></P> <P>We systematically analyze the radiative corrections to the <SUB> S 3 </SUB> symmetric neutrino mass matrix at high energy scale, say the GUT scale, in the charged lepton basis. There are significant corrections to the neutrino parameters both in the Standard Model (SM) and Minimal Supersymmetric Standard Model (MSSM) with large tan ⁡ β , when the renormalization group evolution (RGE) and seesaw threshold effects are taken into consideration. We find that in the SM all three mixing angles and atmospheric mass squared difference are simultaneously obtained in their current 3<I>σ</I> ranges at the electroweak scale. However, the solar mass squared difference is found to be larger than its allowed 3<I>σ</I> range at the low scale in this case. There are significant contributions to neutrino masses and mixing angles in the MSSM with large tan ⁡ β from the RGEs even in the absence of seesaw threshold corrections. However, we find that the mass squared differences and the mixing angles are simultaneously obtained in their current 3<I>σ</I> ranges at low energy when the seesaw threshold effects are also taken into account in the MSSM with large tan ⁡ β .</P>

Quitline Activity in Rajasthan, India

Gupta, Rakesh,Verma, Vinit,Mathur, Pankaj Asian Pacific Journal of Cancer Prevention 2016 Asian Pacific journal of cancer prevention Vol.17 No.no.sup2

Quitline activity in Rajasthan, India is a voluntary activity of Rajasthan Cancer Foundation (RCF) since April 2013. To kick-off, it took the benefit of the State Government- PIRAMAL SWASTHYA (PS)1 collaborative 104 Health Information Helpline that existed already in public-private partnership. It is a reactive quitline that helps callers through the counselors and nursing staff trained specifically through the weekly sessions held by the first author, the RCF resource on quitline. Besides structuring of the scripts for primary intervention and follow-ups after 1 week, 1 month, 6 months and a year, he also monitors calls, advices and coordinates with the supervisors to manage and analyze the data base, and reports to the PS lead at the Jaipur Center on overall performance and to plan strategic communication with the State Government on its outcomes. The quitline has limitations of its informal existence through a voluntary effort of RCF, no specific resource allocation, suboptimal data management, minimal awareness in the masses due to poor IEC (Information, Education and Communication; except its efforts made by RCF in last 1 year through the government-run State TV and City Radio) and staff shortage and its attrition due to lack of plan for career advancement. Despite these challenges in the year 2013, the quit line has registered a quit rate (for complete abstinence) of 19.93% amongst 1525 callers. The quit rate were 58.01% (304/ 524) among the responders at the 3rd follow-up at 18 months (in September 2014)2. In view of an increase in quit rate by 5- 9 times over the prevailing quit rate in the former ever daily users [both smokers and the users of smokeless tobacco (SLT)], efforts are being made by RCF in concurrence with PS to have this cost-effective model established formally with optimal resource allocation in collaboration with willing agencies (the State and Central Governments and the International Quitline Agencies) and its replication in 4 more states where PS is collaborating with the respective state governments similarly (Assam, Chhattisgarh, Jharkhand and Karnataka).

A Note on Continued Fractions and Mock Theta Functions

Srivastava, Pankaj,Gupta, Priya Department of Mathematics 2016 Kyungpook mathematical journal Vol.56 No.1

Mock theta functions are the most interesting topic mentioned in Ramanujan's Lost Notebook, due to its emerging application in the field of Number theory, Quantum invariants theory and etc. In the present research articles we have made an attempt to develop continued fractions representation of all the existing Mock theta functions.

Reclassification of Bacillus beijingensis Qiu et al. 2009 and Bacillus ginsengi Qiu et al. 2009 as Bhargavaea beijingensis comb. nov. and Bhargavaea ginsengi comb. nov. and emended description of the genus Bhargavaea

Verma, Pankaj,Pandey, Prashant Kumar,Gupta, Arvind Kumar,Seong, Chi Nam,Park, Seong Chan,Choe, Han Na,Baik, Keun Sik,Patole, Milind Shivaji,Shouche, Yogesh Shreepad Microbiology Society 2012 International journal of systematic and evolutiona Vol.62 No.10

<P>We have carried out a polyphasic taxonomic characterization of <I>Bacillus beijingensis</I> DSM 19037<SUP>T</SUP> and <I>Bacillus ginsengi</I> DSM 19038<SUP>T</SUP>, which are closely related phylogenetically to <I>Bhargavaea cecembensis</I> LMG 24411<SUP>T</SUP>. All three strains are Gram-stain-positive, non-motile, moderately halotolerant and non-spore-forming. 16S rRNA gene sequence analyses showed that the strains constituted a coherent cluster, with sequence similarities between 99.7 and 98.7 %. The percentage similarity on the basis of amino acid sequences deduced from partial <I>gyrB</I> gene nucleotide sequences of these three type strains was 96.1-92.7 %. Phylogenetic trees based on the 16S rRNA gene and GyrB amino acid sequences, obtained by using three different algorithms, were consistent and showed that these three species constituted a deeply rooted cluster separated from the clades represented by the genera <I>Bacillus</I>, <I>Planococcus</I>, <I>Planomicrobium</I>, <I>Sporosarcina</I>, <I>Lysinibacillus</I>, <I>Viridibacillus</I>, <I>Kurthia</I> and <I>Geobacillus</I>, supporting their placement in the genus <I>Bhargavaea</I>. All three type strains have menaquinone MK-8 as the major respiratory quinone and showed similar fatty acid profiles. The main polar lipids present in the three type strains were diphosphatidylglycerol and phosphatidylglycerol, and the three strains showed peptidoglycan type A4α with l-lysine as the diagnostic diamino acid. The DNA G<I>+</I>C contents of <I>Bacillus beijingensis</I> DSM 19037<SUP>T</SUP>, <I>Bacillus ginsengi</I> DSM 19038<SUP>T</SUP> and <I>Bhargavaea cecembensis</I> LMG 24411<SUP>T</SUP> were 53.1, 50.2 and 53.7 mol%, respectively. The level of DNA-DNA hybridization among the three strains was 57-39 %, indicating that they are members of different species of the genus <I>Bhargavaea</I>. The phenotypic data are consistent with the placement of these three species in a single genus and support their differentiation at the species level. On the basis of these data, we have emended the description of the genus <I>Bhargavaea</I> and propose the reclassification of <I>Bacillus beijingensis</I> and <I>Bacillus ginsengi</I> to the genus <I>Bhargavaea</I>, as <I>Bhargavaea beijingensis</I> comb. nov. (type strain ge10<SUP>T</SUP> = DSM 19037<SUP>T</SUP> = CGMCC 1.6762<SUP>T</SUP>) and <I>Bhargavaea ginsengi</I> comb. nov. (type strain ge14<SUP>T</SUP> = DSM 19038<SUP>T</SUP> = CGMCC 1.6763<SUP>T</SUP>).</P>

Graphene/conducting polymer nano-composite loaded screen printed carbon sensor for simultaneous determination of dopamine and 5-hydroxytryptamine

Raj, Mamta,Gupta, Pankaj,Goyal, Rajendra N.,Shim, Yoon-Bo Elsevier Sequoia 2017 Sensors and actuators. B Chemical Vol.239 No.-

<P><B>Abstract</B></P> <P>A novel and sensitive electrochemical method has been developed for the simultaneous determination of dopamine (DA) and 5-hydroxytryptamine (5-HT) using graphene (GR) and poly 4-amino-3-hydroxy-1-naphthalenesulfonic acid modified screen printed carbon sensor. The electrochemical measurements were studied using cyclic voltammetry, square wave voltammetry, whereas the surface morphology of the modified sensor was characterized by Electrochemical Impedance Spectroscopy and Field Emission scanning electron microscopy. The fabricated sensor facilitated the analysis of DA and 5-HT in the concentration range 0.05–100μM and 0.05–150μM with the detection limit of 2nM and 3nM respectively. The fabricated sensor has been explored for the determination of 5-HT in the plasma samples and the selectivity of the proposed work has been proved by the analysis of DA and 5-HT in the presence of common metabolites present in biological fluids. The analytical applicability of the fabricated sensor has also been successfully demonstrated for the simultaneous detection of DA and 5-HT in the pharmacological formulations, human urine and blood samples.</P> <P><B>Highlights</B></P> <P> <UL> <LI> GR and <I>p</I>-AHNSA nanostructured composite film based screen printed carbon sensor (SPCs) has been fabricated. </LI> <LI> The nanostructured composite film exhibited high electrocatalytical activity. </LI> <LI> High selectivity for 5-HT and DA and lower detection limits were observed. </LI> <LI> The proposed method was successfully applied to detect 5-HT in patient plasma sample. </LI> <LI> The analytical applicability of sensor was demonstrated in biological fluids. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

Variability in Management Practices and Surgical Decision Making in Spinal Tuberculosis: An Expert Survey-Based Study

Ahuja Kaustubh,Gupta Tushar,Ifthekar Syed,Mittal Samarth,Yadav Gagandeep,Kandwal Pankaj 대한척추외과학회 2022 Asian Spine Journal Vol.16 No.1

Study Design: Electronic survey–based study.Purpose: The aim of the study was to objectively review the variability in the prevailing treatment protocols and surgical decision making in the management of patients with spinal tuberculosis (TB) among spine surgeons with expertise in spinal TB across the country.Overview of Literature: A lack of good-quality evidence, ambiguities in the national spinal TB guidelines, and the demand for early rehabilitation and a better quality of life in patients with spinal TB has led to the emergence of various gray zones in the management of spinal TB.Methods: Seventeen fellowship-trained spinal TB experts representing different geographical regions of India completed an online survey consisting of questions pertaining to the conservative management of spinal TB (antitubercular therapy) and 30 clinical case vignettes including a wide spectrum of presentations of spinal TB with no or minimal neurological deficit. The variability in the responses for questions and case wise variability with respect to surgical decision making was assessed using the index of qualitative variation (IQV). The average tendency to operate (TTO) was calculated for various groups of respondents.Results: High variability was observed in all questions regarding conservative spinal TB management (IQV > 0.8). Among the 30 case vignettes, 14 were found to have high variability with respect to surgical decision making (IQV > 0.8). With respect to levels of fixation, all but two cases had poor or slight agreement. Younger age and practice in a government or tertiary care teaching hospital were factors associated with a higher TTO.Conclusions: Significant variability was detected in treatment practices for the management of spinal TB among experts. Most of the case vignettes were found to have significant heterogeneity with respect to surgical decision making, which reflects a significant lack of consensus and lacunae in literature.

A Multicentre, Multinational, Open-Label, 52-Week Extension Study of Gemigliptin (LC15-0444) Monotherapy in Patients with Type 2 Diabetes Mellitus

양세정,민경완,Sandeep Kumar Gupta,박중열,Vyankatesh K. Shivane,Pankaj Kumar Agarwal,김두만,김용승,백세현 대한당뇨병학회 2021 Diabetes and Metabolism Journal Vol.45 No.4

The purpose of this extension study was to assess the long-term efficacy and safety of gemigliptin 50 mg in patients with type 2 diabetes mellitus (T2DM). Patients with T2DM who had completed the initial 24-week study comparing gemigliptin monotherapy with placebo were eligible to enrol. In the open-label, 28-week extension study, all enrolled patients received gemigliptin, regardless of the treatment received during the initial 24-week study period. The mean reduction±standard deviation (SD) in glycosylated hemoglobin (HbA1c) observed after 24 weeks of treatment (-0.6%±1.1%) was further decreased for the gemi-gemi group and the mean change in HbA1c at week 52 from baseline was -0.9%±1.2% (P<0.0001). For the pbo-gemi group, HbA1c decreased after they were switched to gemigliptin, and the mean change in HbA1c at week 52 from baseline was -0.7%±1.2% (P<0.0001). Furthermore, the overall incidence of adverse events demonstrated that gemigliptin was safe and well tolerated up to 52 weeks.