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352 articles for “contact”
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Contact Stress Analysis of Needle Roller Bearing Used in Synchromesh Gear Box
Abstract: The optimum selection of a bearing generally depends on particular application such as to transfer loads between the rotating and stationary members, and to permit free rotation. From among the wide range of bearings available in the market today has various considerations, such as the load-carrying capacity, the life of the bearing, and the working rotational speed need to be considered before a suitable bearing can be selected. Here for …
Published in Trends in Machine design · Vol. 5, Issue 1, 2018 · pp. 5–20 Read article
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Numerical Simulation-based Comparative Study of P3HT-based Top Contact and Bottom Contact OTFTs
Abstract: AbstractIn this paper presents numerical simulation-based comparative study of bottom and top contact configurations of P3HT based organic thin-film transistor (OTFT). I-V characteristics has been evaluated using the TCAD simulator and comparison of the performance parameters of these devices has been presented. The dimensions of the transistors for all the proposed structures are kept the same for a valid comparison between them. The observed results were explained based on the …
Published in Journal of Electronic Design Technology · Vol. 10, Issue 3, 2019 · pp. 27–32 Read article
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Performance Analysis of Fully Flexible Organic Humidity Sensor with Top-Contact and Bottom-Contact OTFTs
Abstract: Abstract: Organic field-effect transistor (OFET) based humidity sensors are extensively used nowadays due to their low cost, mechanically flexible and compatibility with lower temperature fabrication techniques that support the plastic substrate based device and circuit applications. This paper investigates the humidity dependence of performance of organic humidity sensor with Top-Contact and Bottom-Contact OTFTs. Subsequently, impact of channel length on sensor performance is analyzed. The humidity sensitivity of organic sensor drain …
Published in Journal of Semiconductor Devices and Circuits · Vol. 6, Issue 1, 2019 · pp. 26–34 Read article
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Finite Element Modelling of Contact Stresses in Helical Gear Systems
Abstract: Helical gears are widely used in modern power‐transmission systems because of their high load‐carrying capacity, smooth meshing action, and increased overlapping of gear teeth. However, the design of helical gear pairs is constrained by contact stresses generated at the mating tooth surfaces, which can lead to surface fatigue (pitting), micro-cracking, and ultimately gear failure. Traditional analytical methods, such as those of the American Gear Manufacturers Association (AGMA) or International Organization …
Published in Trends in Machine design · Vol. 12, Issue 3, 2025 · pp. 35–39 Read article
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Friction and Wear Response of CottonSeed Oils and Esterified CottonSeed Oil and their Blends with Mineral Engine Oil in a Reciprocating Sliding Contact at Severe Contact Conditions
Abstract: Many studies investigating the tribological performance of pure cottonseed and other bio-based oils have been conducted; a better understanding of vegetable oil tribologicalperformance at extreme conditions is still required. Little work has been carried out to studythe effect of vegetable oils on the performance of a lubricant formed from a blend ofcottonseed oil and conventional mineral engine oil. This work presents the tribologicalperformance of esterified cottonseed oil, and their blends …
Published in Journal of Automobile Engineering and Applications · Vol. 6, Issue 2, 2019 · pp. 20–35 Read article
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Development of Novel Polymeric Articulating Papers for Enhanced Occlusal Contact Assessment in Dentistry
Abstract: Traditional articulating papers, a mainstay in occlusal analysis, often exhibit limitations in consistency and difficulty with quantitative data analysis. This study explores the development of novel articulating papers utilizing advanced polymeric materials. These novel papers aim to address the shortcomings of traditional options by potentially improving: (1) sensitivity and resolution for capturing occlusal contacts, (2) consistency and reproducibility of contact readings, and (3) durability and reusability. The successful development of …
Published in Journal of Polymer & Composites · Vol. 13, Issue 1, 2025 · pp. 1004–1011 Read article
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Non-contact Real Time Digital Distance Measurement System for Vehicle Applications
Abstract: An Arduino-powered Digital Distance Measurement System with LCD Display a compact and precise solution presents a practical and portable digital distance measurement system utilizing the versatility of Arduino microcontrollers and the accuracy of ultrasonic sensors. This system can be utilised for airplane docking system which measures the distance exactly. Leveraging Arduino’s programming capabilities and readily available libraries, the system transmits ultrasonic pulses and analyses the reflected echoes to calculate real-time …
Published in Journal of Polymer & Composites · Vol. 13, Issue 2, 2025 · pp. 670–678 Read article
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Design And Fabrication of Contactless Magnetic Gears
Abstract: Modern engineering prioritizes speed, efficiency, and reliability, spurring innovations like contactless magnetic gear systems that transmit torque through interacting magnetic fields from permanent magnets, eliminating physical contact to drastically cut friction, backlash, wear, lubrication needs, and heat—operating silently with minimal vibration and peak efficiencies up to 99% under ideal conditions, outperforming traditional gears in low-speed, high-torque direct-drive applications such as motors. The design centers on two rotors: an outer high-speed …
Published in Trends in Mechanical Engineering & Technology · Vol. 16, Issue 2, 2026 Read article
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Optimization of Dynamic Load Carrying Capacity of Rolling Contact Bearing by Using TLBO Technique: A Review
Abstract: Rolling contact bearings are widely used in machinery. To deliver excellent performance, the rolling contact bearing has to work efficiently with constraints like strength, long life and high reliability. This work is to optimize the dynamic load carrying capacity of rolling contact bearing for efficient performance. Objective function is to maximize dynamic load carrying capacity with given parameters and constrains and Teaching-Learning Based Optimization (TLBO) technique is selected for the …
Published in Journal of Materials & Metallurgical Engineering · Vol. 5, Issue 3, 2015 · pp. 41–43 Read article
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Experimentally New Technique System to Measure Contact Angle of Metal/Melt System in Simple Way
Abstract: In this research, easy and new technique system to measure contact angle of metals/metals systemwas introduced. The new technique system used a simple component in direct procedure to foundcontact angle of solder on metals substrate in wide range of drops volumes. Solder was applied intoaluminum and copper substrate metals using control heating temperature of the substrate. Then, theresults were analyzed by image J program to know the accuracy of the …
Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 8, Issue 1, 2021 · pp. 38–43 Read article
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A Comprehensive Study on Improving Contact Lens Performance Through Various Approaches
Abstract: Contact lenses improve vision quality by correcting refractive errors and thus provide a convenient alternative to traditional eyeglasses. Apart from vision enhancement, they have multiple applications in cosmetics, drug delivery, and therapeutic use. The performance of these lenses depends on various factors such as material, design, fitting, and interaction between the lens and the eye. The selection of appropriate materials is crucial for maintaining optimal eye health. Properties like oxygen …
Published in Journal of Polymer & Composites · Vol. 13, Issue 3, 2025 · pp. 211–222 Read article
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Study of Contact Temperature During Polishing of Zinc Plate with Ultrasonic Vibration Using Single Pole Magnetic Abrasive Finishing
Abstract: The present work scrutinizes the impact of ultrasonic vibration on the contact temperature during polishing zinc plates with Single Pole Magnetic Abrasive Finishing (SPMAF). The efficacy and eminence of FMAB finishing are pointedly influenced by heat generation at the interaction point, as raised up temperatures can lead to the deprivation of abrasive elements or the bonding material inside the brush, which leads to the fading its overall effectiveness. The magnetic …
Published in Journal of Polymer & Composites · Vol. 14, Issue 2, 2026 · pp. 1239–1247 Read article
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Improved Prediction of Fluid Contacts using Calibrated Material Balance Models
Abstract: The demand for oil has been on the high in the recent past and will continue as search for sustainable alternative energy sources intensifies. The exploration and exploitation of oil from subsurface reservoirs have posed several environmental challenges which include flaring and improper water disposal to name a few, caused by excessive production of gas and water. Hence, it is important to establish a reservoir performance monitoring scheme that will …
Published in Journal of Petroleum Engineering & Technology · Vol. 4, Issue 2, 2014 · pp. 25–36 Read article
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Non-Contact Quantification of Swelling-Induced Deformation in Polymer Hydrogels Using Image Analysis
Abstract: Swelling of polymer hydrogels governs transport, mechanics, and functional performance in biomedical systems, yet it is often reported using bulk ratios that conceal spatially heterogeneous deformation and boundary-driven instabilities. This study presents a non-contact image-analysis framework to quantify swelling-induced deformation by tracking shape and boundary evolution from time-lapse imaging. The approach segments the hydrogel region, extracts a sub-pixel refined contour, and computes boundary displacement descriptors including mean and upper-percentile normal …
Published in Journal of Polymer & Composites · Vol. 14, Issue 2, 2026 · pp. 1499–1509 Read article
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Influence of Metal Contacts on Graphene Based Chemical Sensor Devices
Abstract: Graphene is a versatile material suitable for the device applications, both under normal and harsh environmental conditions. The graphene based devices require stable metallic contacts, both ohmic and rectifying, for reproducible operations. This is especially applicable to the few layer and multilayer graphene. This article deals with different ohmic and Schottky contacts on graphene. The methods of developing contacts by pre deposition and post deposition processing are highlighted. Furthermore, the …
Published in Journal of Microelectronics and Solid State Devices · Vol. 3, Issue 3, 2016 · pp. 1–9 Read article
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Development and Investigation of Minimum Power Non-contact Swirl Vane Gripper
Abstract: The Swirl vane gripper is a new non-contact gripper, which uses negative pressure created by the air swirling flow to create an upward lifting force. This upward force can be used to lift an object, which is placed underneath the gripper. In comparison with other non-contact grippers, this gripper is electrically actuated (rather than pneumatically) and hence require less power to generate same lifting force as produced by other grippers. …
Published in Trends in Electrical Engineering · Vol. 8, Issue 3, 2018 · pp. 28–34 Read article
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Ayurvedic Management of Vataja Oshtharoga Whole System Research (W.S.R.) to Pigmented Contact Cheilitis—A Case Report
Abstract: Acharya Sushruta, in his ancient text, delineated 65 types of Mukha Roga, categorizing them into seven Mukha Avayava. Among which eight Oshtha Roga was classified as Vattaja, Pittaja, Kaphaja, Sannipataja, Rakta, Mamsaja, Medaja, and Kshataja. Among these, Vataja Oshtha Roga stands out, typified by pigmented contact cheilitis in modern medical parlance. This condition manifests initially with a tingling, itching sensation accompanied by swelling of the lips. Over time, the lips …
Published in Journal of AYUSH: Ayurveda, Yoga, Unani, Siddha and Homeopathy · Vol. 13, Issue 2, 2024 · pp. 09–13 Read article
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Incorporating Material Fatigue Parameter Determine in The Rolling & Sliding Contact Fatigue Analysis of Gears
Abstract: As the material's intricate stresses and strains are always shifting during phases of loading, determining the predicted equipment working under rolling-sliding contact loads and their fatigue lives (wheels, bearings, and gears) is particularly difficult. Another difficulty is not knowing the precise characteristics of the material used to make the components, which is particularly noticeable. when it comes to heat-treated components, where the material characteristics' values can differ greatly among the …
Published in Journal of Polymer & Composites · Vol. 12, Issue 4, 2024 · pp. 1–5 Read article
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Fabrication of Low-Cost and High-Efficiency Crystalline Silicon Solar Cells Using Polymeric Carrier Selective Contacts
Abstract: Crystalline silicon (c-Si) solar cells are the leading choice in the photovoltaic market due to their dependability and long-term stability, but lowering production costs and increasing efficiency remain key issues. Organic semiconductors use carrier-selective contacts based on doped amorphous silicon layers and transition metal oxides to simplify and lower the production costs of efficient crystalline silicon solar cells. Polymers are rapidly being used in photovoltaics as flexible substrates, photoanode films, …
Published in Journal of Polymer & Composites · Vol. 12, Issue 6, 2024 · pp. 124–131 Read article
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Dependency of pure liquid pool boiling heat transfer coefficient to bubble contact angle on roughened Brass heater in new model
Abstract: Heat transfer coefficient of nucleate pool boiling Nucleation is a basic part of phase transformations, which plays an important role in understanding and describing any phase change processes. For a boiling process, nucleation appears in the initial stage, and directly affects bubble formation and boiling intensity. According to the heterophase fluctuations which induce phase transition, the phase change has two main types. Classically, phase change caused by the fluctuation with …
Published in Emerging Trends in Chemical Engineering · Vol. 9, Issue 2, 2022 · pp. 29–36 Read article