An efficient ID-based Beta Cryptosystem

Chandrashekhar Meshram 보안공학연구지원센터 2015 International Journal of Security and Its Applicat Vol.9 No.2

In 1984, Shamir [1] introduced the concept of an identity-based cryptosystem. In this system, each user needs to visit a public key generation (PKG) and identify himself before joining a communication network. Once a user is accepted, the PKG will provide him with a secret key. In this way, if a user wants to communicate with others, he only needs to know the “identity” of his communication partner and the public key of the PKG. There is no public file required in this system. However, Shamir did not succeed in constructing an identity based cryptosystem, but only in constructing an identity-based signature scheme. Meshram and Meshram [5] have proposed an identity-based beta cryptosystem, security under the generalized discrete logarithm problem with distinct discrete exponents in the multiplicative group of finite fields and integer factorization problem. In this paper, we propose some modification in identity-based beta cryptosystem based on generalized discrete logarithm problem with distinct discrete exponents in the multiplicative group of finite fields and integer factorization problem and we consider the security against a conspiracy of some entities in the proposed system and show the possibility of establishing a more secure system.

Effect of tetravalent ions dopants and CoO<i> _x </i> surface modification on hematite nanorod array for photoelectrochemical degradation of Orange-II dye

Meshram, Nagsen,Mahadik, Mahadeo A.,Jeong, In-Kwon,Seo, Young Seok,Cho, Min,Jang, Jum Suk ELSEVIER SCIENCE B.V.; AMSTERDAM 2019 JOURNAL- TAIWAN INSTITUTE OF CHEMICAL ENGINEERS Vol.97 No.-

<P><B>Abstract</B></P> <P>The surface modified tetravalent ions doped hematite nanorod photoanodes has been synthesized by successive hydrothermal and spin coating approaches. The effect of tetravalent ion (Sn, Ti, and Zr) doping and high temperature annealing on to the morphological, structural and photoelectrochemical properties has been investigated. Photoelectrochemical analyses indicate tetravalent doping (Sn, Ti, and Zr) and high-temperature annealing (800 °C) showed higher photocurrent and improved activity towards Orange-II dye degradation, compared to the pristine hematite film. Amongst tetravalent dopants, Zr<SUP>4+</SUP> doped hematite can significantly enhance the photocurrent density (1.37 mA cm<SUP>−2</SUP> at 1.23 V <I>vs.</I> RHE) as well as the Orange-II dye degradation activity (93% under one sun illumination in 270 min). Kinetic parameters are also investigated by first-order rate equation. Further, Zr–Fe<SUB>2</SUB>O<SUB>3</SUB> photoanode modified with the appropriate composition of CoO<I> <SUB>x</SUB> </I> and specific structural features demonstrated improvement in photocurrent from 1.6 to 1.78 mA cm<SUP>−2</SUP> (at 1.4 V <I>vs.</I> RHE). The efficient charge carrier separation and generated hydroxyl radicals led to enhancements of the Orange-II dye degradation efficiency up to 97% within 270 min. The significant decrease in chemical oxygen demand values suggests the removal of Orange-II dye. This work demonstrates that enhancement in photoelectrochemical activity is due to the combined effect of passivation of surface states and the formation of CoO<I> <SUB>x</SUB> </I>/Zr–Fe<SUB>2</SUB>O<SUB>3</SUB> heterojunction.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Tetravalent ion doped Fe<SUB>2</SUB>O<SUB>3</SUB> photoanodes were fabricated using hydrothermal method. </LI> <LI> Zr–Fe<SUB>2</SUB>O<SUB>3</SUB> exhibits improved <I>J</I> <SUB>ph</SUB> = 1.37 mA cm<SUP>−2</SUP> than (Sn and Ti) doped samples. </LI> <LI> CoO<I> <SUB>x</SUB> </I> modification exhibits highest <I>j</I> <SUB>ph</SUB> = 1.78 mA cm<SUP>2</SUP> and 97% degradation efficiency. </LI> <LI> Possible charge transfer mechanism during dye degradation is proposed. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

Does Medialization of Glenoid Bone-Baseplate Interface Caused By Eccentric Reaming Influence Outcomes Of Reverse Shoulder Arthroplasty?

Prashant Meshram,Stephen Weber,Jorge Rojas,Jacob Joseph,Uma Srikumaran,Edward McFarland 대한견주관절의학회 2021 대한견주관절학회 학술대회논문집 Vol.2021 No.3

Introduction and Background The purpose of this study was to evaluate the influence of different magnitudes of medialization of the bone-baseplate interface (MBBI) on clinical outcomes including range of motion (ROM), patient reported outcomes (PROs) and incidence of baseplate failure and scapula notching. Material and Method We retrospectively reviewed 91 patients who underwent primary RSA after a minimum 2-year follow-up. The amount of MBBI was estimated using a 3D CT-based computer planning software (Figure 1). Patients were categorized into three groups depending on whether MBBI was less than 3 mm (Group low MBBI, N = 32), between 3 mm to 5 mm (Group moderate MBBI, N = 30), or more than 5 mm (Group high MBBI, N = 29). Range of motion (ROM), ASES score, SST score, and scapular notching were compared between groups. Results Mean MBBI was 1.5 mm (range, 0.5 - 2.5 mm) in low MBBI group, 3.5 mm (range, 3.0 - 5.0 mm) in moderate MBBI group, and 7 mm (range, 5.5 – 10.0 mm) in high MBBI group. At the last follow-up, all patients demonstrated significant improvements in the ROM and functional scores without significant differences in the mean improvement between the three groups (Table 1). There was no correlation between the amount of MBBI and improvement in ROM in any plane. There was no statistical difference (P > 0.05) in the incidence of baseplate failure and scapula notching at the final follow up in low MBBI (17%), moderate MBBI (33%), and high MBBI group (24%). Conclusions This study found that, in primary RSA using a lateralized implant, medialization of glenoid bone-baseplate interface after eccentric reaming does not influence shoulder ROM, PROs, baseplate loosening, or glenoid notching. Further studies with more accurate measuring techniques of MBBI and its results upon patient, implant, and surgical variables are warranted.

Statistical Analysis of an Algorithm's Complexity for Linear Equation

Chandrashekhar Meshram,Sarita Gajbhiye,Deepak Gupta 보안공학연구지원센터 2015 International Journal of Hybrid Information Techno Vol.8 No.2

The present paper, we doing the statistical analysis of insertion sort program and compute its execution times with various parameters. The statistical analysis endorses the specific quadratic pattern of the execution time on the number of items to be sorted. Next, a cursor along the future scope is indicated.

Reverse Shoulder Arthroplasty without Bone-Grafting for Severe Glenoid Bone Loss in Patients with Osteoarthritis and Intact Rotator Cuff: Concise Follow Up at Minimum of Five Years, of Previous Report

Prashant Meshram,Stephen Weber,Jorge Rojas,Jacob Joseph,Uma Srikumaran,Edward McFarland 대한견주관절의학회 2021 대한견주관절학회 학술대회논문집 Vol.2021 No.3

Introduction and Background When performing reverse shoulder arthroplasty in patients with limited glenoid bone, one of the treatment options is to ream the glenoid flat without bone grafting. The purpose of this study was to evaluate the clinical outcomes of this technique in a previously reported cohort after a minimum of 5 years. Material and Method Survival was defined as revision for any cause or baseplate failure with evidence of loosening. Clinical results at follow up were evaluated using patient related outcome scores (PROs) including VAS for pain and range of motion. Radiographic evaluation included scapula notching and baseplate loosening. Results Of the original cohort of 42 patients, 7 had died and 4 were lost to follow up. The remaining 29 patients (31 shoulders) were contacted for follow up at a minimum of 5 years (range, 60 to 141 months). Implant survivorship in those patients at a minimum of 60 months was 97%. If one includes the 1patient who had a failed RTSA prior to 2 years, the overall survivorship at 5 year follow up was 94%. The patients who did not have an implant failure had statistically and clinically significant differences from preoperative to postoperative for the VAS for pain, ASES score, the Simple Shoulder Test, and the SF-36 (Table 1). Radiographic evaluation demonstrated notching in 6 patients (19%) with 2 with grade 1 notching, 2 with grade 2 notching, 1 with grade 3 notching, and 1 with grade 4 notching. Conclusions For patients with osteoarthritis, glenoid bone loss, and an intact rotator cuff, reaming the glenoid flat has excellent survival and clinical results at a minimum of 5 year follow up. While this technique can be successful in addressing glenoid bone loss for this indication, longer term outcomes and the limit of bone loss which can be addressed must still be investigated.

Acid baking of spent lithium ion batteries for selective recovery of major metals: A two-step process

Pratima Meshram,Abhilash,Banshi Dhar Pandey,Tilak Raj Mankhand,Haci Deveci 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.43 No.-

The present work focuses on a two-step process for selective dissolution of metals from cathode activematerial of spent LIBs. Cathode powder baked at 300 C using H2SO4 being subjected tofirst stageleaching with water extracted 78.6% Li, 80.4% Co in 60 min at 75 C and 25% pulp density; recovery of Niand Mn being low (<15%). In second stage, reductive leaching was performed using an acid mixture(H2SO4 and HNO3) with glucose solubilizing 67% Ni, 64.8% Mn in 45 min. The overall recovery of themetals was 93.2% Li, 90.52% Co, 82.8% Ni, 77.7% Mn.

Can Metal Artifact Reduction Sequence Magnetic Resonance Imaging (MARS-MRI) Help in the Diagnosis of Periprosthetic Shoulder Infection? A Prospective Blinded Trial

Prashant Meshram,Stephen Weber,Edward McFarland,Jacob Joseph,Benjamin Fritz,Uma Srikumaran,Jan Fritz 대한견주관절의학회 2021 대한견주관절학회 학술대회논문집 Vol.2021 No.3

Introduction and Background The utility of Metal Artifact Reduction Sequence Magnetic Resonance Imaging (MARS-MRI) in diagnosing periprosthetic shoulder infection (PSI) is unknown. The aims of the study were to 1) report the accuracy of MARS-MRI findings in diagnosing PSI, and 2) report the inter- and intra-observer reliability of MARS-MRI findings in diagnosing PSI. Material and Method Patients suspected to have PSI were prospectively recruited from one institution between 2015 and 2019. The inclusion criteria were the availability of ESR, CRP, synovial fluid aspiration, MARS-MRI, and a minimum of one year follow up (Table 1). Of 130 patients who underwent MARS-MRI, 89 (68%) patients met criteria. Patients in `the “not infected” group (total N=67) did not require a surgery at last follow up (47/67, 70%). or were categorized using the ICM 2018 classification as “unlikely” PSI (N=20/67, 30%). Patients were in the “infected” group (N) if they had a surgery after MARS MRI and per ICM 2018 criteria were “definite” PSI (N= 7, 32%), “probable” PSI (N=7, 32%), or “possible” PSI (N=8, 36%). For each MRI there were 8 findings consistent with infection, and all scans were studied independently by two blinded musculoskeletal radiologists. The diagnostic accuracy of MARS-MRI findings for PSI was evaluated with sensitivity (Sn), specificity (Sp), and accuracy (using area under the curve, AUC). Results Results The highest accuracy for diagnosis of PSI was seen with axillary lymphadenopathy (Sn=95%, Sp=92%, AUC=94%), complex joint effusion (Sn=86%, Sp=86%, AUC=86%), and edematous synovitis (Sn=91%, Sp=97%, AUC=94%) (Table 2). The intra- and inter-reader reliability of MARS-MRI findings was very good (κ > 0.8) for all studied MRI findings. Conclusions This prospective blinded study demonstrates a high accuracy and reliability of MARS-MRI for the diagnosis of PSI. Advanced MARS-MRI can be a very useful preoperative investigation for evaluating patients with painful arthroplasty for infection.

Multi-criteria Decision Making Using Genetic Algorithmic Approach in Computer Simulation Models

Chandrashekhar Meshram,Shyam Sundar Agrawal 보안공학연구지원센터 2015 International Journal of Hybrid Information Techno Vol.8 No.6

In this paper, we described a genetic algorithm that allows finding the optimal configuration for a stochastic discrete events simulator when multiple performance measures have to be considered simultaneously. This type of algorithmic approach provide particularly interesting when the decision making authority is shared by multiple decision makers with conflicting priorities. The optimal solutions found with this algorithm typically represent a middle ground solution that may be acceptable to all the involved parties. The multi-criteria approach relies on an interval based variant of the Promethee method, which is combined with a feasibility score to obtain the ranking of the chromosomes within a certain generation of the genetic algorithm.

Evaluation of different attacks on Knowledge Based Authentication technique

Vijeet Meshram International Journal of Computer ScienceNetwork S 2023 International journal of computer science and netw Vol.23 No.4

Knowledge Based Authentication is the most well-known technique for user authentication in a computer security framework. Most frameworks utilize a straightforward PIN (Personal Identification Number) or psssword as an data authenticator. Since password based authenticators typically will be software based, they are inclined to different attacks and weaknesses, from both human and software.Some of the attacks are talked about in this paper.

BK polyomavirus infection following COVID-19 infection in renal transplant recipients: a single-center experience

( Hari Shankar Meshram ),( Vivek B. Kute ),( Sanshriti Chauhan ) 대한신장학회 2021 Kidney Research and Clinical Practice Vol.40 No.3