An Intelligent 2D Secret Share Construction using Visual Cryptography for Secure Transmission

( N. Rajesh Kumar ),( R. Bala Krishnan ),( G. Manikandan ),( N. R. Raajan ) 한국인터넷정보학회 2020 KSII Transactions on Internet and Information Syst Vol.14 No.7

Data Security is the most challenging area in Internet communication, where most of the secret sharing schemes are proposed for binary images. But still it lacks in providing security for data communication, especially in image transmission. Traditional visual cryptography scheme generate meaningless diwies and the reconstruction phase leads to quality degradation over the secret image. In this work, an intelligent two dimensional secret share construction scheme is proposed. A secret image is expanded into n diwies with the choice of scheme selection. By Stacking all the qualified diwies to revert the secret image without content loss and less than s* - 1 shares could not reveal any information about the secret image. The experimental results emphasize that the proposed secret share scheme is highly secured for image transmission.

Facile synthesis of monodispersed 3D hierarchical Fe₃O₄ nanostructures decorated r-GO as the negative electrodes for Li-ion batteries

Kumar, S. Rajesh,Kim, Jong Guk,Viswanathan, C.,Kim, Won Bae,Selvan, R. Kalai,Ponpandian, N. Elsevier 2018 Materials research bulletin Vol.97 No.-

<P><B>Abstract</B></P> <P>One-pot solvothermal process is adopted to develop, 3D hierarchical Fe<SUB>3</SUB>O<SUB>4</SUB> nanoparticles supported 2D reduced graphene oxide sheets (Fe<SUB>3</SUB>O<SUB>4</SUB>/r-GO) as possible negative electrodes for lithium ion batteries. The synthesis parameters are optimized to prepare agglomeration-free Fe<SUB>3</SUB>O<SUB>4</SUB> nanostructures with uniform size and shape on r-GO. The field emission scanning electron microscopic (FESEM) image reveals that the 3D hierarchical Fe<SUB>3</SUB>O<SUB>4</SUB> nanostructures are uniformly decorated on r-GO. The physicochemical and functional properties of Fe<SUB>3</SUB>O<SUB>4</SUB>/r-GO are systematically investigated using various techniques. The fabricated Fe<SUB>3</SUB>O<SUB>4</SUB>/r-GO electrode delivers an initial discharge capacity of 1221mAhg<SUP>−1</SUP> at a current density of 100mAg<SUP>−1</SUP> and retains the specific capacity of 1560mAhg<SUP>−1</SUP> after 100 cycles. Fe<SUB>3</SUB>O<SUB>4</SUB>/r-GO significantly enhances cyclic performance, when compared with bare Fe<SUB>3</SUB>O<SUB>4</SUB> nanoparticles due to the uniform distribution of Fe<SUB>3</SUB>O<SUB>4</SUB> nanoparticles on the graphene sheet with the more number of electrochemically active sites.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Monodispersed Fe<SUB>3</SUB>O<SUB>4</SUB> nanostructures with different shapes synthesized by solvothermal method. </LI> <LI> The fabricated Fe<SUB>3</SUB>O<SUB>4</SUB>/r-GO electrode delivers an initial discharge capacity of 1221mAhg<SUP>−1</SUP> at 100mAhg<SUP>−1</SUP>. </LI> <LI> Fe<SUB>3</SUB>O<SUB>4</SUB>/r-GO significantly enhances the cyclic stability and rate capability than bare Fe<SUB>3</SUB>O<SUB>4</SUB> nanoparticles </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

SYNTHESIS OF CATALYST-FREE AND TEMPERATURE CONTROLLED MORPHOLOGIES OF CARBON NANOSTRUCTURES USING BOTANICAL HYDROCARBON: CASTOR OIL

RAJESH KUMAR,R. S. TIWARI,O. N. SRIVASTAVA 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2011 NANO Vol.6 No.3

Castor oil (combination of fatty acids) precursor containing hydrocarbon with less amount of oxygen is used first time for synthesis of different carbon nanostructures (i.e., agglomerated carbon nanoparticles, carbon nanobeads and carbon tubular structure). The agglomerated carbon nanoparticles, carbon nanobeads and carbon tubular structure were synthesized by applying CVD method at different temperature using castor oil as new carbon precursor without any catalyst. The synthesis of carbon nanostructure is free from additional catalyst as this hydrocarbon (castor oil) is cheap with abundant sources of carbon. The effect of pyrolysis temperatures on the size, quality and quantity of the synthesized carbon shape were investigated. Interestingly, the morphology of the carbon nanostructures can be controlled in shape from agglomerated carbon nanoparticle to nanobeads to carbon tubular structure just by increasing the temperature from 750°C to 800°C to 850°C, respectively. These nanobeads are chains of uniform size of graphitized carbon spheres. These chains comprised individual carbon particles size of ~ 450 nm. The products were characterized by X-ray powder diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), Raman spectroscopy and Fourier transform infrared spectroscopy (FTIR).

WHO Class of Obesity Influences Functional Recovery Post-TKA

Rajesh N Maniar,Parul R Maniar,Tushar Singhi,Bharat Kumar Gangaraju 대한정형외과학회 2018 Clinics in Orthopedic Surgery Vol.10 No.1

Background: No study in the literature has compared early functional recovery following total knee arthroplasty (TKA) in the obese with the nonobese using World Health Organization (WHO) classes of obesity. Our aim was to compare functional scores and flexion post-TKA in each class of obesity as per WHO classification against a matched control group of nonobese patients. Methods: Records of 885 consecutive primary TKA patients (919 knees) operated by a single surgeon were reviewed. The first 35 knees in each class I, class II and class III obesity group during the study period were then matched with a similar number of knees in nonobese TKA patients during the same period. Functional scores recorded pre- and postoperatively at 3 months and 1 year were Western Ontario and McMaster Osteoarthritis Index (WOMAC), Short-Form Health Survey (SF-12) score, and Knee Society Score (KSS). Results: There was no difference in any parameter between the class I obese and matched nonobese at any assessment point. In the class II obese, as compared to the nonobese, there was no difference in any parameter preoperatively and 3 months postoperatively. However, 1 year postoperatively, the SF-12 physical subscore was lower in the class II obese than the nonobese (44.7 vs. 48.6, p = 0.047) and the WOMAC score was significantly higher (15.8 vs. 9.7, p = 0.04). In the class III obese, the WOMAC score was significantly higher than the nonobese (58.1 vs. 44.3, p < 0.001 preoperatively; 15.7 vs. 8.1, p = 0.005 at 1 year) and KSS was significantly lower (83.5 vs. 96.5, p = 0.049 preoperatively; 172 vs. 185; p = 0.003 at 1 year). Knee flexion was significantly lower in the class III obese than the nonobese (95 vs. 113; p < 0.001 preoperatively; 120 vs. 127; p = 0.002 at 1 year). Conclusions: The class I obese can expect good early and late functional recovery as the nonobese. The class II obese can expect comparable early functional recovery as the nonobese but their late function may be lesser. The class III obese would have poorer functional scores and lesser knee flexion postoperatively compared to the nonobese. However, compared to their own preoperative status, there is definite improvement in function and knee flexion.

Addition of Endoscopic Ultrasound (EUS)-Guided Fine Needle Aspiration and On-Site Cytology to EUS-Guided Fine Needle Biopsy Increases Procedure Time but Not Diagnostic Accuracy

Rajesh N. Keswani,Kumar Krishnan,Sachin Wani,Laurie Keefer,Srinadh Komanduri 대한소화기내시경학회 2014 Clinical Endoscopy Vol.47 No.3

Background/Aims: Although the diagnostic accuracy of endoscopic ultrasound with fine needle aspiration (EUS-FNA) in pancreas adenocarcinomais high, endoscopic ultrasound with fine needle biopsy (EUS-FNB) is often required in other lesions; in these cases, it may bepossible to forgo initial EUS-FNA and rapid on-site cytology evaluation (ROSE). The aim of this study was to compare the diagnostic accuracyof EUS-FNB alone (EUS-FNB group) with a conventional sampling algorithm of EUS-FNA with ROSE followed by EUS-FNB(EUS-FNA/B group) in nonpancreas adenocarcinoma lesions. Methods: Retrospective cohort study of subjects who underwent EUS sampling of nonpancreatic adenocarcinoma lesions between February2011 and May 2013. Results: Over the study period, there were 43 lesions biopsied in 41 unique patients in the EUS-FNB group and 53 patients in the EUSFNA/B group. Overall diagnostic accuracy was similar between the EUS-FNB and EUS-FNA/B groups (83.7% vs. 84.9%; p=1.0). In thesubgroup of subepithelial mass lesions, diagnostic accuracy remained similar in the EUS-FNB and EUS-FNA/B groups (81.0% and 70.6%;p=0.7). EUS-FNB procedures were significantly shorter than those in the EUS-FNA/B group (58.4 minutes vs. 73.5 minutes; p<0.0001). Conclusions: EUS-FNB without on-site cytology provides a high diagnostic accuracy in nonpancreas adenocarcinoma lesions. There appearsto be no additive benefit with initial EUS-FNA but this requires further study in a prospective study.

Evaluation of Aflatoxin B1 Biosynthesis in A. flavus Isolates from Central India and Identification of Atoxigenic Isolates

Tarun Kumar Patel,Rajesh Anand,Agam Prasad Singh,Jata Shankar,Bhupendra N. Tiwary 한국생물공학회 2014 Biotechnology and Bioprocess Engineering Vol.19 No.6

Present study describes the effect of temperatureand pH on biosynthesis of aflatoxin B1 (AFB1) to identifyatoxigenic (aflatoxin non-producer) isolates of Aspergillusflavus. An indigenous detection method for AFB1 wasdeveloped using tandem mass spectrometric method. Detection of AFB1 was carried out in positive polarityusing triple quadrapole mass spectrometer with electrosprayionization interface in Multiple Reaction Monitoring(MRM) mode. A total of four A. flavus isolates wereselected for screening of AFB1 biosynthesis at pH 4.0, 5.5,7.0, and 8.5 at 27°C. Highest AFB1 biosynthesis inMTCC11866 was found at pH 6.5 while in MTCC9367 itwas at pH 7.0. On screening AFB1 biosynthesis in A. flavusculture at various temperatures a significant suppression inAFB1 biosynthesis was found at 37°C in comparison to 24and 27°C in MTCC11866 and MTCC9367. AFB1 was notdetected in other two A. flavus isolates MTCC11580 andMTCC11588 at any temperature and pH tested. AFB1nonproducing isolates, MTCC11580 and MTCC11588could be used as potent biocontrol agent. Additionally,present standardized method for AFB1 detection may findits application in qualitative and quantitative analysis ofAFB1 contamination in food crop and other products.

Prognostication of Climate Using Sliding Window Algorithm

D.V.N. Koteswara Rao,M.Anusha,P. Nagendra Babu,M. Divya Sri,N.Rajesh,K. Sandeep Kumar 보안공학연구지원센터 2015 International Journal of u- and e- Service, Scienc Vol.8 No.4

Weather forecasting is the task of determining future state of the atmosphere. To predict the future’s weather condition, the variation in the conditions in past years must be utilized. The probability that the weather condition of the day in consideration will match the same day in previous year is very less. But the probability that it will match within the span of adjacent sixty days of previous year is very high. A Sliding window algorithm is emerging as a leading methodology for the application of weather prediction. So, the prediction is made based on sliding window algorithm. So, sixty days are considered for previous year a sliding window is selected of size equivalent to fifteen days. Every thirty days of sliding window is then matched with that of current year’s thirty days in consideration. The best matched window is made to participate in the process of predicting weather conditions. The month wise results are being computed for four months to check the accuracy. The experimental results demonstrate that the applied technique gives better predicted weather conditions are quite efficient with an average accuracy of 94.21%.

Fabrication of Gas Metal Arc Welding Based Wire Plus Arc Additive Manufactured 347 Stainless Steel Structure: Behavioral Analysis Through Experimentation and Finite Element Method

R. Pramod,S. Mohan Kumar,A. Rajesh Kannan,N. Siva Shanmugam,Reza Tangestani 대한금속·재료학회 2022 METALS AND MATERIALS International Vol.28 No.1

Wire plus arc additive manufacturing (WAAM) technology is utilized to fabricate a 347 stainless steel (SS347) plate usingthe gas metal arc welding process. The tensile properties of the WAAM plate revealed enhanced strength in comparisonwith the wrought alloy SS347. The microhardness and the ferrite measurement along the building direction (BD) were inthe range of 265–226 HV0.5 and 2.2–5.1 FN (Ferrite number), respectively. The microstructural features were comprehensively examined using electron backscatter difraction (EBSD) analysis and the Inverse pole fgure (IPF) maps revealed astrong <001> texture along the BD. Also, well-aligned equiaxed and columnar dendrites with a lower fraction of niobiumcarbide (NbC) was noticed in the microstructures of the as-built WAAM plate. A three-dimensional fnite element modelwas developed to simulate the build-up of a WAAM plate. Goldak heat source is used to model heat fux in thermal analysis,and the temperature distributions were predicted. Further, residual stress and plastic strain distributions were examined atvarious stages of the WAAM process.

Interesting Presentation of Mycosis Fungoides in Staging on F-18 FDG PET/CT

Deepanksha Datta,Tanvi Sarwal,Rajesh Kumar,Sandeep Bairwa,Vinay N. Gowda,Aasma Nalwa 대한핵의학회 2023 핵의학 분자영상 Vol.57 No.5

Mycosis fungoides is the major form of primary cutaneous T cell lymphoma. Its staging is based on the percentage of bodysurface involvement and biopsy-proven extra cutaneous nodal or visceral involvement. Literature shows F-18 FDG accumulationin disease-involved nodes and viscera with non-specific uptake due to co-existing inflammation limits its specificity. Wereport an interesting case of mycosis fungoides with bilateral upper limb edema and share its findings on F-18 FDG PET/CT.

Mapping and assessing land degradation vulnerability in Kangra district using physical and socio-economic indicators

Satya Prakash,Milap Chand Sharma,Rajesh Kumar,P. S. Dhinwa,K. L. N. Sastry,A. S. Rajawat 대한공간정보학회 2016 Spatial Information Research Vol.24 No.6

Land degradation is a major problem in the fragile ecosystem of the Himalayan region. The steep slope with low forest cover and increasing human interference are the major factors of land degradation. Therefore, identification of severe degradation prone areas is necessary for implementing conservation strategies to retard the present rate of degradation processes. The aim of this study is to assess the vulnerable land degradation areas based on Space Application Centre (SAC/ISRO) guidelines and MEDALUS model. Indicators used to calculate the degradation vulnerability are geology, slope, aspect, soil type, rainfall, temperature, land use/land cover, population density, non-worker population and illiteracy. The results reveal that the areas with higher rainfall, less forest cover and large population are highly vulnerable to degradation in spite of moderate slope. The degradation vulnerability index values have been classified into five land degradation categories. The Pong dam is a large water body where the land degradation is nil. The low, moderate, high and very high land degradation categories account for 19.01, 22.79, 31.49 and 17.37% area of the district, respectively.