Other affiliations: Jerusalem College of Engineering, Chennai
Bio: A. Arivarasi is an academic researcher from VIT University. The author has contributed to research in topics: Salt-and-pepper noise & Noise. The author has an hindex of 2, co-authored 4 publications receiving 24 citations. Previous affiliations of A. Arivarasi include Jerusalem College of Engineering, Chennai.
TL;DR: A systematic review of the literature focusing on existing challenges is carried out in this paper, where the authors describe, review, classify and analyze the current challenges in 3D printing processes for combined electrochemical and microfluidic fabrication areas.
Abstract: The purpose of this paper is to describe, review, classify and analyze the current challenges in three-dimensional printing processes for combined electrochemical and microfluidic fabrication areas, which include printing devices and sensors in specified areas.,A systematic review of the literature focusing on existing challenges is carried out. Focused toward sensors and devices in electrochemical and microfluidic areas, the challenges are oriented for a discussion exploring the suitability of printing varied geometries in an accurate manner. Classifications on challenges are based on four key categories such as process, material, size and application as the printer designs are mostly based on these parameters.,A key three-dimensional printing process methodologies have their unique advantages compared to conventional printing methods, still having the challenges to be addressed, in terms of parameters such as cost, performance, speed, quality, accuracy and resolution. Three-dimensional printing is yet to be applied for consumer usable products, which will boost the manufacturing sector. To be specific, the resolution of printing in desktop printers needs improvement. Printing scientific products are halted with prototyping stages. Challenges in three-dimensional printing sensors and devices have to be addressed by forming integrated processes.,The research is underway to define an integrated process-based on three-dimensional Printing. The detailed technical details are not shared for scientific output. The literature is focused to define the challenges.,The research can provide ideas to business on innovative designs. Research studies have scope for improvement ideas.,Review is focused on to have an integrated three-dimensional printer combining processes. This is a cost-oriented approach saving much of space reducing complexity.,To date, no other publication reviews the varied three-dimensional printing challenges by classifying according to process, material, size and application aspects. Study on resolution based data is performed and analyzed for improvements. Addressing the challenges will be the solution to identify an integrated process methodology with a cost-effective approach for printing macro/micro/nano objects and devices.
••01 Feb 2014
TL;DR: The project introduces a Fuzzy Based Weighted Vector Median Filter (FWMF) model to detect and eliminate the salt noise, pepper noise, Gaussian Mixed Impulsive noise and one only filtering operation: a weighted Median.
Abstract: The project introduces a Fuzzy Based Weighted Vector Median Filter (FWMF) model to detect and eliminate the salt noise, pepper noise, Gaussian Mixed Impulsive noise. The mixed noises are applied to gray scale images and colour images. Through fuzzy logic methodology, the noises are detected and eliminated. Mixed impulsive and Gaussian noise reduction from digital color images is a challenging task because it is necessary to appropriately process both types of noise, that in turn need to be distinguished from the original image structures such as edges and details. Fuzzy theory is useful to build simple, efficient and effective solutions for this problem. In this paper, which proposes a fuzzy method to reduce Gaussian and impulsive noise from color images, uses one only filtering operation: a weighted Median. A fuzzy rule system is used to assign the weights so that both noise types are reduced and image structures are preserved. Experimental results should show the efficiency of the proposed fuzzy method, providing competitive results.
TL;DR: In this paper, the copper particles of around 100 nm sizes are used for experimentation and a coating is made with a thickness ranging 6.41 µm to 8 µm without usage of laser mechanisms.
Abstract: The use of nano materials, particularly copper is of interest, in areas like printed electronics and chemical engineering. Copper is highly conductive in nature and thin films on a substrate makes the structure more significant. Printing copper requires melting of macro size particles conventionally, whereas the viscous mixture of nano ink composition, utilizing spray mechanism in 3D printing for precision. The copper particles of around 100 nm sizes is used for experimentation and a coating is made with a thickness ranging 6.41 µm to 8.41 µm without usage of laser mechanisms, which is shown through SEM images. The grain size distribution is uniform and porosity is 0.56% measured through optical microscope. Resistivity measured is 7µ ohm cm / 7e-8 ohm m. The structure will be further utilized for an electrochemical sensing mechanism based on water quality measurement procedure. The advantages are lower processing temperature and usage of vacuum and controlled environment is avoided. This is cost-effective to avoid bigger 3D printing machineries.
••01 Jan 2018
01 Jan 2016
TL;DR: In this article, a continuous flow synthesis (CFS) method is proposed for the efficient, effective and reproducible synthesis of inorganic compounds, and the effect of synthesis route on particle size, size distribution, and crystallinity is compared.
Abstract: Advanced materials are essential to the quality of modern day life, but the synthesis of these compounds is often inefficient in terms of energy, time and resources; especially when considering the hydrothermal batch methods used to prepare many such compounds – often requiring week-long reaction times with variable yields and product quality. In contrast, Continuous flow synthesis (CFS) provides a more readily scalable means for the efficient, effective and reproducible synthesis of inorganic compounds. This publication demonstrates the novel CFS of several metal ammonium phosphates and compare the effect of synthesis route on particle size, size distribution, and crystallinity.
TL;DR: The new filtering design proved to restore efficiently color images corrupted by even strong impulsive noise, while preserving tiny image details, which allows its application in real-time image processing tasks.
Abstract: In the paper, a new approach to the impulsive noise removal in color images is presented. The new filtering design is based on the peer group concept, which determines the membership of a central pixel of the filtering window to its local neighborhood, in terms of the number of close pixels. Two pixels are declared as close if their distance in a given color space does not exceed a predefined threshold value. A pixel is treated as not corrupted by the impulsive noise process, if its peer group consists of at least two close pixels, otherwise this pixel is replaced by a weighted average of uncorrupted samples from the local neighborhood. The peer group size assigned to each pixel is used for the averaging operation, so that pixels which have many peers are taken with higher weight. The new filtering design proved to restore efficiently color images corrupted by even strong impulsive noise, while preserving tiny image details. The beneficial property of the proposed filter is its very low computational complexity, which allows its application in real-time image processing tasks.
TL;DR: The application advance of 3D printing in the field of LIBs is reviewed, including the operation principles, requirements for raw printing materials and manufacturing accuracy of different3D printing techniques.
TL;DR: In this paper, a review of the 3D printing-enabled nanoparticle alignment in well-established and in-house customized 3D-printing mechanisms that can lead to selective deposition and preferential orientation of nanoparticles is presented.
Abstract: 3D printing (additive manufacturing (AM)) has enormous potential for rapid tooling and mass production due to its design flexibility and significant reduction of the timeline from design to manufacturing. The current state-of-the-art in 3D printing focuses on material manufacturability and engineering applications. However, there still exists the bottleneck of low printing resolution and processing rates, especially when nanomaterials need tailorable orders at different scales. An interesting phenomenon is the preferential alignment of nanoparticles that enhance material properties. Therefore, this review emphasizes the landscape of nanoparticle alignment in the context of 3D printing. Herein, a brief overview of 3D printing is provided, followed by a comprehensive summary of the 3D printing-enabled nanoparticle alignment in well-established and in-house customized 3D printing mechanisms that can lead to selective deposition and preferential orientation of nanoparticles. Subsequently, it is listed that typical applications that utilized the properties of ordered nanoparticles (e.g., structural composites, heat conductors, chemo-resistive sensors, engineered surfaces, tissue scaffolds, and actuators based on structural and functional property improvement). This review's emphasis is on the particle alignment methodology and the performance of composites incorporating aligned nanoparticles. In the end, significant limitations of current 3D printing techniques are identified together with future perspectives.
TL;DR: In this paper, a polyamide electrochemical cell and electrodes manufactured from a polylactic acid-carbon nanotube conductive composite were used to investigate the electrochemical oxidation of aqueous hydrazine coupled to its bulk reaction with carbon dioxide.