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Proposed Methods for Real-Time Measurement of Posterior Condylar Angle during TKA
( Prateek Behera ),( Devendra Kumar Chouhan ),( Mahesh Prakash ),( Mandeep Dhillon ) 대한슬관절학회 2014 대한슬관절학회지 Vol.26 No.4
purpose: Conventional instruments are known to result in high numbers of outliers in restoring femoral component rotation primarily due to fixed degree of external rotation resection relative to the posterior condylar line (PCL). Outliers can be reduced by determining the patient specific posterior condylar angle (PCA) preoperatively or intraoperatively. There is a paucity of methods that can be used during surgery for determining the PCA. We propose two simple, real-time methods to determine the PCA and hence to measure the axial anatomical variation during surgery. materials and methods: The study was conducted using axial computed tomography (CT) scans of the knees of 26 patients. The commercial software K-PACS and our proposed two methods (trigonometric and protractor) were used to measure the angle between the transepicondylar axis and PCL, i.e., PCA. Statistical comparison between the mean angles obtained by K-PACS and our methods were done. results: The three methods resulted in similar PCAs. The mean PCA measured by the three methods were similar. The mean PCA value measured by the K-PACS, trigonometric method and protractor method was 6.27o (range, 0o to 12o), 6.23o (range, 0o to 11.11o) and 6.31o (range, 0o to 12o), respectively. There were significant correlations between the K-PACS measured PCA and trigonometrically or protractor measured PCA. conclusions: Our novel, simple, easily reproducible, real-time and radiation-free PCA measurement methods obviate the need for preoperative CT scan for identification of patient specific PCA.
Genetic Based Hesitation Information Mining for Profitability Management
Prateek Shrivastava,Akhilesh Tiwari 보안공학연구지원센터 2015 International Journal of Database Theory and Appli Vol.8 No.6
Traditional Association Rule Mining has been extensively used to discover interesting rules or relationships between items in large databases but it has limitations that it solely deals with the items or products that are sold but avoids the items that are nearly sold. These nearly sold things carry hesitation data since customers are indecisive to shop for them. In this paper, with the help of vague set theory, we describe that item’s hesitation information is precious knowledge for the design of profitable selling strategies. This work proposed Genetic Algorithm based on evolution principles that has found its strong base in mining or maximize the rules for the items that customers mostly hesitate to purchase or has a high percentage of hesitation because of some reasons like price of an item, quality of an item, etc. Fitness function, crossover, and mutation are the main parameters involved in Genetic Algorithm which we used in our work. This work describes that if the reason of giving up the items is identified and resolved, we can easily remove this hesitation status of a customer and considering newly evolved rules as the interesting ones for boosting the sales of the item.
Prateek Kumar,Maneesha Gupta,Kunwar Singh,Naveen Kumar 한국전기전자재료학회 2022 Transactions on Electrical and Electronic Material Vol.23 No.2
Continuous failure of Metal oxide semiconductor field-effect transistors due to short channel effects has motivated researchers to find novel devices like tunnel field-effect transistors and junctionless transistors. The impractical nature of the analysed devices showed that the metal oxide semiconductor field-effect transistor is still the backbone of the industry. In this manuscript, a single transistor-based AND gate is analysed. For designing the gate, a split-gate metal oxide semiconductor field-effect-transistor is used. Due to the physical limitations of Silicon, MoTe2 is considered as the substrate material. To consider all the quantum effects, the Non-equilibrium Green’s function is used to solve the device behavior. The split-gate acts as the input for the designed AND logic structure. For state ‘01’ and ‘10’, different device properties are studied andit is shown that proper conduction does not take place when either of the gates is in OFF-state. For state ‘11’, the analysed device operates as conventional MOSFET, and the drain current–gate voltage characteristics are studied. To investigate the device thoroughly, the effect of parameter variation on device characteristics is examined. The device behavior as an AND gate is confi rmed by checking the linearity parameters. It is found that the device can be used as an AND gate with low noise and power dissipation.
Prateek Kumar,Maneesha Gupta,Gaurav Kr,Naveen Kumar,Vishal Yadav 한국전기전자재료학회 2021 Transactions on Electrical and Electronic Material Vol.22 No.4
At nanoscale along with the failure of Metal oxide semiconductor field-effect transistor due to short channel effects, Silicon has raised as another bottleneck for researchers. In the last couple of decades, researchers have provided diff erent solutions in the form of Graphene and Transition Metal Dichalcogenides materials. Each Graphene and Transition Metal Dichalcogenides has its own set of disadvantages like poor I ON /I OFF ratio and lower carrier mobility and hence cannot be used individually. In this article, a tub type metal oxide semiconductor field-effect transistor is designed and for application of the device in a low power VLSI domain, the back-gated technique is used. Different device properties are studied first with a Silicon-based channel and then a Silicon-Tungsten Disulphide heterojunction channel. The selection of SiO2 as a gate insulator and contact material is also justified. This article shows that instead of using conventional Silicon-based devices it is better to use heterojunction devices, as they offer much lower OFF-state current and better linearity properties.
Infected Lower Limb Megaprosthesis on 68Ga-NOTA-Ubiquicidin PET/CT Imaging
Prateek Kaushik,Satya Dev Maurya,Nishikant Damle,Sanjana Ballal,Venkatesan Sampath Kumar,Chandrasekhar Bal,Madhavi Tripathi 대한핵의학회 2022 핵의학 분자영상 Vol.56 No.3
Pain after prosthesis implant is a common clinical problem which requires distinction of septic from aseptic causes since the treatment differs. Non-invasive imaging methods play an important role in the diagnosis. Radiolabelled ubiquicidin can be used for imaging infection by binding directly to bacterial cell wall. We describe a case of a 24-year-old man with right lower limb megaprosthesis which did not show any loosening on computed tomography (CT) but was accurately diagnosed as infected prosthesis with 68Ga-NOTA-ubiquicidin(29-41) acetate scan.
Analysis of Wavelet Denoising of a Colour ImageWith Different Types of Noises
Prateek Kumar,Sandeep Kumar Agarwal 보안공학연구지원센터 2015 International Journal of Signal Processing, Image Vol.8 No.6
There are various types of noises that affect quality of an image such as Salt-and-pepper noise, Poison noise, Gaussian noise, Speckle noise etc. Wavelet is a powerful tool for denoising a variety of signals. Here a White Flower image has been taken for denoising purpose with the help of HAAR Transform. The noisy image is first decomposed into five levels to obtain different frequency bands. Then hard thresholding method is used to remove the noisy coefficients by fixing the optimum thresholding value. In this paper, analysis of a colored image is carried out with four different noises at zero mean that are applied on the image to produce noisy images. Residual image is obtained from the original and noisy image & its statistical parameters such as mean, median, mode, standard deviation, mean absolute deviation, median absolute deviation are calculated. In order to enhance the quality of the noisy images, performance parameters of denoised images must be estimated. The comparison between noisy and denoised image is taken in terms of MSE (mean square error), PSNR (peak signal to noise ratio), RMSE (root mean square error), SNR (signal to noise ratio) and SSIM (structural similarity index).
Applications of Bone Histology in Tracking Exploitation Markers: From the Site Inamgaon, Maharashtra
Prateek Chakraborty 대한체질인류학회 2020 대한체질인류학회지 Vol.33 No.2
Bone Histology, particularly the study of osteon morphology and morphometry is used extensively by palaeontologists to reconstruct pre-mortem conditions in large vertebrates. The skeletal system is dynamic and undergoes modification throughout an animal’s life cycle in response to various physical and environmental stimuli, most notably in the remodelling and reconfiguration of skeletal tissue at the microscopic level. The size, shape and distribution of osteons in the long bones of a vertebrate animal have often been proved to reflect various changes engineered by adverse environmental conditions. The present work assumes that the exploitation of domestic animals - especially when carried out intensively over a relatively short period - can engender similar changes in the osteon microstructures of these animals through activity such as herd migration, fattening, confinement and so on. Taking the Late Jorwe phase at the Deccan Chalcolithic site of Inamgaon as a case study, the present work carries out a histological examination of bone samples of Sheep (Ovis aries) and Goat (Capra hircus), which were intensively exploited at the site during this period. The shape, frequency and configuration of osteons (and other histological features) are recorded and correlated with the different phases of exploitation in order to determine their effect on the skeletal tissues.