DEVELOPMENT OF AGRI-BOT FOR SEED SOWING AUTOMATION

Vijay K. Pandey,Vijay Kumar Gupta,Tanuja Sheorey 제어로봇시스템학회 2023 제어로봇시스템학회 국제학술대회 논문집 Vol.2023 No.10

Transbuccal versus transoral approach for management of mandibular angle fractures: a prospective, clinical and radiographic study

Purva Vijay Sinai Khandeparker,Vikas Dhupar,Rakshit Vijay Sinai Khandeparker,Hunny Jain,Kiran Savant,Vikas Berwal 대한구강악안면외과학회 2016 대한구강악안면외과학회지 Vol.42 No.3

Objectives: We compared the transbuccal and transoral approaches in the management of mandibular angle fractures. Materials and Methods: Sixty patients with mandibular angle fractures were randomly divided into two equal groups (A, transoral approach; group B, transbuccal approach) who received fracture reduction using a single 2.5 mm 4 holed miniplate with a bar using either of the two approaches. Intraoperatively, the surgical time and the ease of surgical assess for fixation were noted. Patients were followed at 1 week, 3 months, and 6 months postoperatively and evaluated clinically for post-surgical complications like scarring, infection, postoperative occlusal discrepancy, malunion, and non-union. Radiographically, the interpretation of fracture reduction was also performed by studying the fracture gap following reduction using orthopantomogram tracing. The data was tabulated and subjected to statistical analysis. A P-value less than 0.05 was considered significant. Results: No significant difference was seen between the two groups for variables like surgical time and ease of fixation. Radiographic interpretation of fracture reduction revealed statistical significance for group B from points B to D as compared to group A. No cases of malunion/non-union were noted. A single case of hypertrophic scar formation was noted in group B at 6 months postsurgery. Infection was noted in 2 patients in group B compared to 6 patients in group A. There was significantly more occlusal discrepancy in group A compared to group B at 1 week postoperatively, but no long standing discrepancy was noted in either group at the 6 months follow-up. Conclusion: The transbuccal approach was superior to the transoral approach with regard to radiographic reduction of the fracture gap, inconspicuous external scarring, and fewer postoperative complications. We preferred the transbuccal approach due to ease of use, minimal requirement for plate bending, and facilitation of plate placement in the neutral mid-point area of the mandible.

RETRACTED ARTICLE: Spatio–temporal attention based real-time environmental monitoring systems for landslide monitoring and prediction

M. Vijay Sekhar Babu,N. Ashokkumar,Anjali Joshi,Pallavi Sagar Deshpande,Ismail Keshta,Renato R. Maaliw III 대한공간정보학회 2024 Spatial Information Research Vol.32 No.2

The Publisher has retracted this article in agreement with the Editor-in-Chief. The article was submitted to be part of a guest-edited issue. An investigation by the publisher found a number of articles, including this one, with a number of concerns, including but not limited to compromised editorial handling and peer review process, inappropriate or irrelevant references or not being in scope of the journal or guest-edited issue. Based on the investigation's fndings the publisher, in consultation with the Editor-in-Chief therefore no longer has confdence in the results and conclusions of this article. Authors N. Ashokkumar, Anjali Joshi, Pallavi Sagar Deshpande and Renato R. Maaliw III disagree with this retraction. Author M. Vijay Sekhar Babu has not responded to correspondence regarding this retraction. The publisher has been unable to obtain a current email address for author Ismail Keshta. The online version of this article contains the full text of the retracted article as Supplementary Information.

Phase Evolution Pathways in Stack and Co-sputtered Precursors in CZTSSe Thin Film Solar Cells

Vijay Karade,Jin Hyeok Kim(김진혁) 한국신재생에너지학회 2020 한국신재생에너지학회 학술대회논문집 Vol.2020 No.8

Effect of Precursor Composition Ratio on Surface Potential of Cu₂ZnSn(S,Se)₄ Based Absorber Layers

Vijay Karade,Jin Hyeok Kim 한국신재생에너지학회 2021 한국신재생에너지학회 학술대회논문집 Vol.2021 No.7

Solar cells based on earth abundant materials are of prime importance in PV sector for the development of sustainable energy resources. The kesterite-based photoabsorber materials Cu₂ZnSn(S,Se)₄ (CZTSSe) have achieved the record device efficiency of 12.6%, but still it is lower than CIGS solar cell. This work we offer insights into the surface potential of the bulk and GB interfaces. To study the effect of metallic composition ratio on carrier separation process the tin (Sn) composition is varied. As the composition ratio varies the absorber morphology improves with the growth of larger grains. Further with increases in Sn content the change in the defect density observed, validated through Raman analysis. The secondary ion mass spectroscopy study demonstrated the altered distribution of sulfur (S) and sodium (Na) in CZTSSe thin films. The synergistic outcome of the increased density of defects and the accumulation of S near the interface provides a larger GB and GI difference and expedites carrier separation improvement. Subsequently, the device efficiency gets significantly improved from 6.42 to 11.04% with an open-circuit voltage (VOC) deficit of 567 mV.

Single-bit digital comparator circuit design using quantum-dot cellular automata nanotechnology

Vijay Kumar Sharma 한국전자통신연구원 2023 ETRI Journal Vol.45 No.3

The large amount of secondary effects in complementary metal-oxide-semiconductor technology limits its application in the ultra-nanoscale region. Circuit designers explore a new technology for the ultra-nanoscale region, which is the quantum-dot cellular automata (QCA). Low-energy dissipation, high speed, and area efficiency are the key features of the QCA technology. This research proposes a novel, low-complexity, QCA-based one-bit digital comparator circuit for the ultra-nanoscale region. The performance of the proposed comparator circuit is presented in detail in this paper and compared with that of existing designs. The proposed QCA structure for the comparator circuit only consists of 19 QCA cells with two clock phases. QCA Designer-E and QCA Pro tools are applied to estimate the total energy dissipation. The proposed comparator saves 24.00% QCA cells, 25.00% cell area, 37.50% layout cost, and 78.11% energy dissipation compared with the best reported similar design.

The approximate solution of higher-order of fractional differential equations using collocation method based on Chebyshev polynomials of third kind

Vijay Saw,Sushil Kumar 장전수학회 2019 Proceedings of the Jangjeon mathematical society Vol.22 No.1

In this paper, the collocation method for the approximate solution of higher order multiterm fractional differential equations (FDEs) in terms of Chebyshev polynomials. The multi-term FDEs and its initial or boundary conditions are transformed into equations, which correspond to a system of algebraic equations with unknown Chebyshev coefficients. The solution of this system yields the Chebyshev coefficients of the solution formula. Several numerical examples, such as Cauchy and Bagley-Torvik fractional differential equations are provided to confirm the accuracy and the effectiveness of the proposed method. Numerical simulation with the exact solution of FDEs is presented. The graph and approximate solution are calculated in MATLAB.

Evaluation of responses of semi-rigid frames at target displacements predicted by the nonlinear static analysis

Vijay Sharma,Mahendra K. Shrimali,Shiv D. Bharti,Tushar K. Datta 국제구조공학회 2020 Steel and Composite Structures, An International J Vol.36 No.4

Responses of semi-rigid frames having different degrees of semi-rigidity obtained by the nonlinear static analysis (NSA) are evaluated at specific target displacements by comparing them with those obtained by the nonlinear time-history analysis (NTHA) for scaled earthquakes. The peak ground accelerations (PGA) of the earthquakes are scaled such that the obtained peak top story displacements match with the target displacements. Three different types of earthquakes are considered, namely, far-field and near-field earthquakes with directivity and fling-step effects. In order to make the study a comprehensive one, three degrees of semi-rigidity (one fully rigid and the other two semi-rigid), and two frames having different heights are considered. An ensemble of five-time histories of ground motion is included in each type of earthquake. A large number of responses are considered in the study. They include the peak top-story displacement, maximum inter-story drift ratio, peak base shear, total number of plastic hinges, and square root of sum of the squares (SRSS) of the maximum plastic hinge rotations. Results of the study indicate that the nonlinear static analysis provides a fairly good estimate of the peak values of top-story displacements, inter-story drift ratio (for shorter frame), peak base shear and number of plastic hinges; however, the SRSS of maximum plastic hinge rotations in semi-rigid frames are considerably more in the nonlinear static analysis as compared to the nonlinear time history analysis.

Safety Profile, Feasibility and Early Clinical Outcome of Cotransplantation of Olfactory Mucosa and Bone Marrow Stem Cells in Chronic Spinal Cord Injury Patients

Vijay G Goni,Rajesh Chhabra,Ashok Gupta,Neelam Marwaha,Mandeep S Dhillon,Sudesh Pebam,Nirmal Raj Gopinathan,Shashidhar Bangalore Kantharajanna 대한척추외과학회 2014 Asian Spine Journal Vol.8 No.4

Study Design: Prospective case series. Purpose: To study the safety and feasibility of cotransplantation of bone marrow stem cells and autologous olfactory mucosa in chronic spinal cord injury. Overview of Literature: Stem cell therapies are a novel method in the attempt to restitute heavily damaged tissues. We discuss our experience with this modality in postspinal cord injury paraplegics. Methods: The study includes 9 dorsal spine injury patients with American Spinal Injury Association (ASIA) Impairment Scale (AIS) A neurological impairment who underwent de-tethering of the spinal cord followed by cotransplantation with bone marrow stem cells and an olfactory mucosal graft. Participants were evaluated at the baseline and at 6 monthly intervals. Safety and tolerability were evaluated through the monitoring for adverse events and magnetic resonance imaging evaluation. Efficacy assessment was done through neurological and functional outcome measures. Results: Surgery was tolerated well by all participants. No significant difference in the ASIA score was observed, although differences in the Functional Independence Measure and Modified Ashworth Scale were statistically significant. No significant complication was observed in any of our patients, except for neurogenic pain in one participant. The follow-up magnetic resonance imaging evaluation revealed an increase in the length of myelomalacia in seven participants. Conclusions: The cotransplantation of bone marrow stem cells and olfactory mucosa is a safe, feasible and viable procedure in AIS A participants with thoracic level injuries, as assessed at the 24-month follow-up. No efficacy could be demonstrated. For application, further large-scale multicenter studies are needed.

Bandgap Engineering in CZTSSe Thin Films via Controlling S/(S+Se) Ratio

Vijay C. Karade,Jun Sung Jang,Kuldeep Singh Gour,Yeonwoo Park,Hyeonwook Park,Jin Hyeok Kim,윤재호 한국태양광발전학회 2023 Current Photovoltaic Research Vol.11 No.3

The earth-abundant element-based Cu2ZnSn(S,Se)4 (CZTSSe) thin film solar cells (TFSCs) have attracted greater attention in the photovoltaic (PV) community due to their rapid development in device power conversion efficiency (PCE) >13%. In the present work, we demonstrated the fine-tuning of the bandgap in the CZTSSe TFSCs by altering the sulfur (S) to the selenium (Se) chalcogenide ratio. To achieve this, the CZTSSe absorber layers are fabricated with different S/(S+Se) ratios from 0.02 to 0.08 of their weight percentage. Further compositional, morphological, and optoelectronic properties are studied using various characterization techniques. It is observed that the change in the S/(S+Se) ratios has minimal impact on the overall Cu/(Zn+Sn) composition ratio. In contrast, the S and Se content within the CZTSSe absorber layer gets altered with a change in the S/(S+Se) ratio. It also influences the overall absorber quality and gets worse at higher S/(S+Se). Furthermore, the device performance evaluated for similar CZTSSe TFSCs showed a linear increase and decrease in the open circuit voltage (Voc) and short circuit current density (Jsc) of the device with an increasing S/(S+Se) ratio. The external quantum efficiency (EQE) measured also exhibited a linear blue shift in absorption edge, increasing the bandgap from 1.056 eV to 1.228 eV, respectively.