20,275 results
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Journal Article Full text
Performance Evaluation of Laser-induced Graphene on Wood under Laser Modulation
Laser-induced graphene (LIG) fabrication technology, introduced by the James Tour group at Rice University in 2014, has been extensively explored for various applications. These applications include physical sensors such as bending, temperature, and touch sensors; chemical sensors like gas and pH…
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Development of the Fretting Corrosion Test Equipment for the Automotive Electrical Connector
Fretting corrosion results from microscopic abrasion of connector contacts and is influenced by environmental conditions in automotive applications. This study designed and fabricated test equipment capable of evaluating fretting corrosion characteristics at low temperatures. A temperature–humidity…
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Study on the Variation in Mechanical Performance of Medical Balloons depending on Polymer Tube Extrusion Process Variables
Balloon catheters are a key technology in medical devices, essential for minimally invasive procedures. This study quantitatively analyzes how the orientation characteristics of polymer tubes, influenced by extrusion conditions, affect the mechanical properties and compliance of the final…
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Autoencoder-based Milling Cutting Force Monitoring by Spindle Vibration Signal Detection
In machining operations, dynamometers are typically used to directly measure the forces acting on cutting tools. However, their high cost and complex setup restrict their use to laboratory environments, making them unsuitable for real-time monitoring in general production settings. To overcome this…
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Effect of Flash-light Sintering Voltage on the Microstructure and Chemical Properties of Lithium Lanthanum Titanate Thin Films Prepared by Electrostatic Spray Deposition
All-solid-state batteries (ASSBs) utilizing non-flammable inorganic electrolytes are gaining significant attention due to safety concerns associated with conventional lithium-ion batteries. Among various oxide electrolytes, lithium lanthanum titanate (LLTO) demonstrates high ionic conductivity at…
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Optimal Design of Inducer by Flow Characteristics in LNG Cargo Pump
The study examined the flow characteristics within an LNG cargo pump, specifically focusing on how variations in the geometry of the inducer and inducer casing affect pump performance. LNG cargo pumps are essential for transferring LNG from carriers' storage tanks to onshore facilities. The inducer…
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Direct Ink Writing of Tungsten Planar Patterns by Extrusion-based Dispensing System
We present an extrusion-based dispensing system designed for the planar patterning of tungsten ink through direct ink writing. This system achieves uniform ink deposition by precisely controlling the dispensing pressure and the motion of the substrate along predefined writing paths. To assess the…
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Study on the Reduction of Charge in Electrostatically Charged Particles Using a Neutralizer
This study examines the charge reduction characteristics of charged particles using a neutralizer to prevent accidents from electrostatic discharge and enhance process efficiency. The research measures the number of charges, elimination efficiency, and penetration rate under various voltage…
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Experimental Study on the Formation of Discharge Crater Morphology in Micro EDM
As advanced materials with high hardness, strength, and heat resistance are increasingly applied in fields such as aerospace, semiconductors, biomedical engineering, and mold manufacturing, the demand for high-precision machining technologies is growing. Micro electrical discharge machining…
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Estimation of Kinematic Parameters of a 6-Axis Serial Robot through a Circular Test Using a Double Ball-Bar
This study introduces a straightforward and cost-effective method to enhance the positional accuracy of a 6-axis serial robot using a double ball-bar (DBB). Kinematic errors, a primary source of inaccuracies in offline programming, are estimated and calibrated through circular tests. The kinematics…
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Ceiling Hazardous Object Inspection Robot for Counter-terrorism Security Check
Ceiling inspections present challenges due to limited accessibility and structural constraints. To ease the burden on security personnel, who would otherwise need to manually disassemble, inspect, and restore ceiling components, this study proposes a robotic system for detecting hazardous objects…
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Structural Design and Analysis of a Quadcopter Type CanSat for Diverse Launch Conditions
This study evaluates the structural design and safety of the CanSat in launch environments. The CanSat serves as an educational replica satellite, allowing users to experience the design and operation of small satellites. To ensure stable operation during launch, the structural analysis and design…
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Flexible Acoustic Emission Sensor Signal Classification Using Convolutional Neural Networks for Pipeline Leak Detection
This paper presents a method for the real-time detection of pipeline leaks using flexible Acoustic Emission (AE) sensors. The signals gathered from the AE sensor are transformed into RGB images through the application of Mel-spectrogram and color coding. These converted images serve as input for a…
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Real-time Instance Segmentation-based Object Detection and Adaptive Placing Algorithm for Low Cost Bin-picking System
Robots are increasingly utilized in manufacturing and logistics, where bin-picking has become crucial for managing randomly placed objects. However, traditional methods often rely on expensive 3D vision systems, have limited adaptability to unstructured environments, and primarily focus on the…
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Development of an Actuator and Controller for Robotic Joints Integrating a Frameless BLDC Motor and a Stepped Planetary Gear Reducer
This paper details the design and development of a robotic joint actuator that combines a frameless BLDC motor with a two-stage stepped planetary gear reducer, as well as a custom-built controller for precise position control. The rotor is physically coupled to a hollow sun gear shaft to facilitate…
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A Machine Learning-based Approach for Classifying Waveform Distortion Due to Misalignment in SHPB Experiments
The Split Hopkinson Pressure Bar (SHPB) experiment is commonly employed to assess the dynamic mechanical properties of materials under high strain-rate conditions (10²-10⁴ s-¹) through the propagation of elastic stress waves via pressure bars. The precision and dependability of SHPB measurements…
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Model-based Hysteresis and Cross-coupling Compensation for Precision Control of Piezoelectric Fast Steering Mirror
This paper presents model-based hysteresis and cross-coupling compensators designed for precise control of a piezoelectric fast steering mirror (FSM). The hysteresis compensators are developed by inversely modeling the variation in the force constant relative to various excitation voltages…
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Development of a Adjustable fastening Mechanism for Wearable Robots Utilizing the Poisson's Ratio Properties of Braided Sleeves
This study introduces a novel adjustable fastening mechanism for wearable robots, aimed at alleviating user discomfort associated with traditional fixed attachment methods. By utilizing the unique scissoring effect of braided sleeves, we demonstrated that axial manipulation can effectively…
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Optimization of Electrode Interface Control Process of Soft Electronic Devices for Low Energy Consumption
In this study, we demonstrate a well-established strategy for controlling the threshold voltage (Vth) in organic thin-film transistors (OTFTs) by applying uniform gold nanoparticle (AuNP) coatings onto silver nanowire (AgNW) electrodes using a galvanic replacement process in the presence of NaCl…
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Design of a Circular Chamfering Device for a Centrifugal Casting Post-processing Device
This paper presents the design of an automatic circumferential chamfering device that processes the inner and outer diameter corners of centrifugal cast pipes after cutting. These large, heavy pipes (dimensions: 389 mm x 5700 mm x 36 mm; weight: 1,200 kg) are produced using the centrifugal casting…
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