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320 articles for “Defect”
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Effect of Geometry, Material and Blank Holder Force on Formability of BIW parts
Abstract: The major constituent of any car body consists of about 400 sheet metal stamped parts. Geometry and material of these parts is not uniform. In order to design these parts for any car, it is essential to know how these parts are manufactured. During our study of the manufacturing processes of these parts, we found that the part designs are repeatedly sent back to the body design team for change …
Published in Journal of Automobile Engineering and Applications · Vol. 2, Issue 1, 2015 · pp. 29–37 Read article
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Design Optimization of Microstrip Antenna with EBG and DGS Using the Genetic Algorithm to Reduce the Mutual Coupling
Abstract: The purpose of this paper is to construct, create, and reproduction of different antenna structures using electromagnetic band gap (EBG) materials and defected ground structures (DGS). Microstrip antennas are processed in order to improve performance by changing the shape of the geometry of the antenna, in particular to reduce the mutual coupling between the elements. The propagation of electromagnetic waves in a specified frequency range have the unique ability to …
Published in Journal of Microwave Engineering and Technologies · Vol. 3, Issue 1, 2016 · pp. 11–30 Read article
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Pathways of Periodontal Disease and Alveolar Bone Loss in Type II Diabetes
Abstract: or poorly-controlled type II diabetes often exhibits a high morbidity of periodontal pathology. Food impaction in defective restorations or open proximal contacts often leads to infection, carious lesions, periodontitis, alveolar bone loss and often tooth loss. An iatrogenic injury occurs when restorations are defective, fractures, or have open proximal contacts and are not planned to be repaired or replaced. In addition to having poor therapeutic outcomes, defective restorations or open …
Published in Research and Reviews: A Journal of Dentistry · Vol. 4, Issue 3, 2013 · pp. 28–35 Read article
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Design and Analysis of Multi Band Patch with Enhanced Bandwidth
Abstract: In this article, a novel lower edge defected multi-band patch with modified ground structure (or Defected Ground Structure-DGS) with enhanced bandwidth has been presented. The bandwidth can be enhanced by defecting the partial ground and by arc truncation of lower edges of the patch. The antenna was converted into multi-band by defecting the lower corners. The antenna is resonating at multiple bands i.e. 3.7 GHz, 7.87 (~7.9) GHz, 12.19 (~12.2) …
Published in Journal of Microwave Engineering and Technologies · Vol. 7, Issue 3, 2020 · pp. 1–8 Read article
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Performance Analysis of Proximity Coupled Microstrip Patch Antenna with DGS and EBG
Abstract: The objective of this paper is to analyze the effect of Defected Ground Structure (DGS) in a Proximity Coupled Microstrip Patch Antenna (PCMA) and the effectiveness of using this structure in a PCMA with an Electromagnetic Bandgap Structure (EBG). The EBG structure used is a metallo-dielectric structure having a printed metallization with connected via ground plane. This manoeuvering of EBG enabled PCMA with a dumbbell shaped DGS results in a …
Published in Journal of Microwave Engineering and Technologies · Vol. 2, Issue 3, 2015 · pp. 1–8 Read article
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A Review of the Effects of Filler Rod on Bimetallic Weld Joint
Abstract: FSW (Friction Stir Welding) is a technology for joining solid-state metals. Welding metal does not melt and recast. Tunnel defects, kissing bonds, cracks, pin holes, and pipping defects are some of the most common in FSW. The defects occur as a result of poor metal mixing and insufficient heat input in the weld nugget zone. Only a small body of literature has focused on filler material and process parameters for …
Published in Trends in Machine design · Vol. 9, Issue 1, 2022 · pp. 33–39 Read article
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Design of Lowpass Filter with Improved Roll Off Factor using Coin Shape Fractal DGS
Abstract: This paper presents the design of lowpass planar filter with improved roll of factor. To improve the performance figures of filter such as return loss, roll off factor, compactness, etc. coin shape fractal defected ground structure (DGS) has been embedded in the ground plane of the filter. The proposed filter gives improvement of roll off factor about 5 times as compared to traditional filter design technique. Laboratory prototypes of all …
Published in Research & Reviews: A Journal of Embedded System & Applications · Vol. 7, Issue 1, 2019 · pp. 1–9 Read article
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Anticipated Root Coverage Utilizing the Minimally Invasive VISTA Technique with and without Autologous L-PRF: Documentation of Two Case Studies
Abstract: Gingival recession refers to the downward movement of the marginal gingiva from its typical location on the tooth crown to levels along the root surface beyond the cemento-enamel junction. Miller Class I and Class II recession are those for which the prognosis and chances of clinical success is greatest, and numerous evidences in the existing literature reports that the Coronally Advanced Flap (CAF) based procedure along with autologous subepithelial connective …
Published in Research and Reviews: A Journal of Dentistry · Vol. 14, Issue 3, 2023 · pp. 24–30 Read article
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Role of Autologous Bone Suspension in Scalp Electric Burns
Abstract: Performing bone grafts is a complex and intricate procedure that demands a high level of skill to ensure successful outcomes. The reconstruction of calvarial defects poses a formidable challenge, primarily attributed to factors such as widespread infection, the compromised health condition of the patient, and the presence of comorbidities. Over the years, various approaches and techniques have been explored and documented in an effort to address the closure of defects …
Published in Research and Reviews : Journal of Surgery · Vol. 12, Issue 3, 2023 · pp. 20–25 Read article
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Developed an Approach to Monitor the Technical Conditions of the Wheels by Measuring the Rolling Stock-track Forces
Abstract: With the rapid development of railway transportation, there is a growing need to improve the method of measuring the impact force exerted by rolling stock on the rail track. Monitoring the technical conditions of the rail track and wheels is crucial. This research aimed to investigate the improvement of existing systems for wheel monitoring during operation and propose a method to develop rolling stock diagnostic systems while the train is …
Published in International Journal of Machine Systems and Manufacturing Technology · Vol. 1, Issue 1, 2023 · pp. 23–34 Read article
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Statistical Modeling for Weld Quality Assessment using AI SAW Welding of Mild Steel
Abstract: The main issue to the industries that apply Submerged Arc Welding (SAW) is quality assurance since the structural integrity dictates safety and the performance of the industry. The existing system of checking manuals is not only time consuming but also has human errors that make it mandatory to deploy automated intelligent systems. This study carries out an extensive comparison of the leading approaches based on the use of Artificial Intelligence …
Published in Journal of Polymer & Composites · Vol. 14, Issue 2, 2026 · pp. 892–907 Read article
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Congenital Heart Disease (CHD) Detection Technique Based on Analysis and Classification of ECG Signal
Abstract: As per American Heart Association information, every year 125 babies out of 1000 are born with congenital heart disease (CHD). It was estimated that 36000 children are live born with CHD each year in the European Union. Child with CHD may have hole in heart up to 3–5 mm as small defects and for large defects it may go up to 5–8 mm. Depending upon the size of hole in …
Published in Current Trends in Signal Processing · Vol. 6, Issue 3, 2016 · pp. 29–27 Read article
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Design and Analysis of Microstrip Band Reject Filter with Modified Rectangular and Hexagonal Shape Ground Structure
Abstract: In this proposed paper, the performance of band stop filter with modified ground structure is examined; the modified ground structure includes four rectangular and a hexagonal etched shapes in ground plane. Parameters of the proposed design were calculated at the cut off frequencies of f1=1.16 GHz, f2=1.89 GHz and also proposed designs having substrate height of 1.6 mm, loss tangent of 0.02 and dielectric constant of 4.4. Results are calculated …
Published in Journal of Microwave Engineering and Technologies · Vol. 4, Issue 2, 2017 · pp. 1–5 Read article
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Bandwidth Enhancement of MPA using DGS
Abstract: In this paper, the authors proposed an MPA with DGS to enhance its parameters and mainly bandwidth of the antenna. To achieve a very important bandwidth enhancement the authors proposed a rectangular shaped symmetrical DGS in the ground plane. This DGS on the ground plane increases the fringing field which reluctantly increases the parasitic capacitance. This increases the coupling between patch and ground which make the bandwidth to increase from …
Published in Journal of Microwave Engineering and Technologies · Vol. 3, Issue 1, 2016 · pp. 6–10 Read article
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Design and Analysis of Microstrip Band Stop Filter with Modified Circle and Dumbbell Shape Ground Structure
Abstract: In this proposed paper the performance of Band stop filter with modified ground structure is analyzed in this specific work; the modified ground structure includes a circle and dumbbell etched shapes in ground plane. Parameters of the proposed configuration were calculated at the cut off frequencies of f1=1 GHz, f2=1.62GHz and also proposed designs having substrate height of 1.6 mm, loss tangent of 0.02 and dielectric constant of 4.4. Results …
Published in Journal of Microwave Engineering and Technologies · Vol. 2, Issue 2, 2015 · pp. 26–31 Read article
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Triple Band PIFA Antenna Using The DGS Method
Abstract: In this paper, a new design of a triple band Planner Inverted –F Antenna (PIFA) with DGS, for mobile and wireless communication systems is presented. The PIFA antenna consists of ground plate, patch antenna, feeding port and shorting plate connected to the ground plate. The designed antenna has been simulated with the help of the CST (computer Simulation Technology) software microwave studio 2010. The simulated results calculated for the resonant …
Published in Journal of Microwave Engineering and Technologies · Vol. 1, Issue 2, 2014 · pp. 9–16 Read article
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Efficient PCB Fault Detection System using Deep Learning and Image Processing
Abstract: Printed Circuit Boards (PCBs) are essential parts that support the operation of electronic equipment in a variety of sectors. Nevertheless, difficulties that manufacturers regularly face during the PCB manufacturing process lead to defective devices. However, current inspection processes occur after etching, wasting a lot of material and rendering defective PCBs unusable. This study discusses relevant practical difficulties and offers a method for identifying errors in real PCB images using Matlab …
Published in Journal of Nuclear Engineering & Technology · Vol. 13, Issue 3, 2023 · pp. 1–5 Read article
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A New Dual Side Cut Corner Circularly Polarized Rectenna 2.45 GHz with DGS
Abstract: This paper introduces a new dual side cut corner circular polarized (CP) high efficiency rectifying antenna (Rectenna) array. The Rectenna consists of a truncated square patch antenna and a rectifying circuit. The Rectenna use a micro-strip patch antenna as a frequency 2.45 GHz and gain of 31.29 dB. The Rectenna circuit has a low pass filter (LPF) the maximum RF to DC conversion efficiency of the Rectenna is 68%.
Published in Journal of Telecommunication, Switching Systems and Networks · Vol. 2, Issue 3, 2015 · pp. 19–23 Read article
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Autonomous Optimization, Method Design of Casting and Its Experimental Validation: A Case Study
Abstract: The metal casting is a complicated but a mass production manufacturing technique. But on the otherhand, the chances of casting rejection are also more if proper attention is not made at every stage ofcasting production. In the metal casting process, higher yield and minimum defects level are expectedby the foundry industries. In the present global and competitive world metal casting industries needsto perform efficiently with a reduction in rejections. This …
Published in Trends in Machine design · Vol. 8, Issue 1, 2021 · pp. 1–10 Read article
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Evaluation of Acceleration Signal Frequency Results on Bearing Shell Non-destructive Testing, Ultrasonic Waves, Simulation
Abstract: Bearings are used in many rotary machines. Defects in them can cause car breakdowns, loss of production, and even catastrophic accidents. This makes them difficult to maintain and will make it costly to repair and maintain. Therefore, detecting defects in bearing vibrations is an important issue for the industry. On the other hand, error-related frequencies may be identified as discrete frequency lines, and therefore error characteristics cannot be easily identified.For …
Published in Trends in Machine design · Vol. 8, Issue 1, 2021 · pp. 42–47 Read article