An Implementation of Web-based Machining Operation Planning

AbstractThis paper introduces a machining operation planning system for practical use in small and medium sized manufacturers. The system passes through two stages: manual input of required information and semi-automated generation of an operation plan. At the first stage, removal volumes out of a workpiece and their reference details on the part drawing are translated into the specific machining features manually. The operations to be performed for each feature are then selected from the operation list related to the feature. At the second stage, the cutting tool for each operation is determined with its proper cutting conditions by using a rule-based algorithm and retrieving a machining database gradually updated. The web interface makes it possible for the manufacturers to keep a record of their machining practice in the database and obtain the favorable data from the various sources when needed. An example is shown to demonstrate the usefulness of the system

밀리미터파 대역에서 엔드 파이어 방사 패턴을 갖는 초소형 수직 편파 안테나

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28 GHz 5G dual-polarized end-fire antenna with electrically-small profile

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28 GHz Pattern Reconfigurable Block Cell Antenna featuring Electrically Small Profile

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37–39 GHz Vertically-Polarized End-fire 5G Antenna Array featuring Electrically Small Profile

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Millimeter-Wave 5G Antenna-on-Display Topology Featuring Wideband and Dual-Polarization for Cellular Devices

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3D in-bath triple coaxial cell-printing of geometry-tunable brain blood vessels for cancer extravasation study

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Tissue-Specific Decellularized Extracellular Matrix Bioinks for Musculoskeletal Tissue Regeneration and Modeling Using 3D Bioprinting Technology

The musculoskeletal system is a vital body system that protects internal organs, supports locomotion, and maintains homeostatic function. Unfortunately, musculoskeletal disorders are the leading cause of disability worldwide. Although implant surgeries using autografts, allografts, and xenografts have been conducted, several adverse effects, including donor site morbidity and immunoreaction, exist. To overcome these limitations, various biomedical engineering approaches have been proposed based on an understanding of the complexity of human musculoskeletal tissue. In this review, the leading edge of musculoskeletal tissue engineering using 3D bioprinting technology and musculoskeletal tissue-derived decellularized extracellular matrix bioink is described. In particular, studies on in vivo regeneration and in vitro modeling of musculoskeletal tissue have been focused on. Lastly, the current breakthroughs, limitations, and future perspectives are described

24-1: Invited Paper: Optically Invisible Antenna-on-Display (AoD) Technologies: Review, Demonstration and Opportunities for Microwave, Millimeter-Wave and Sub-THz Wireless Applications

This paper provides a detailed overview of an optically invisible phased-array antenna-on-display (AoD) technology for microwave, millimeter-wave (mmWave), and sub-THz wireless scenarios such as wireless communication, radar, sensing etc. The fundamental AoD configuration and stack-up are introduced with numerical results, which proves the trade-off relationship between optical transmittance and RF conductivity. A transverse magnetic patch antenna for Wi-Fi and Bluetooth accessibility is implemented on the active display panel of a real-life smartwatch device. The fully functional smartwatch prototype including the electromagnetic wrist phantom features a total radiation efficiency of 22% at 2.4 GHz. The optically invisible phased-array AoD is fully integrated within the view area of high-resolution OLED display panels of mmWave 5G NR cellular handsets. The fabricated cellular handset prototype including optically invisible beamforming AoD features optical transmittance of more than 88 % and beam scanning of ± 30° with the estimated maximum EIRP of 14.4 dBm. The over-the-air test confirms that the fabricated phased-array AoD prototype satisfies the 3GPP's EVM performance requirement for 5G NR cellular devices. Future work collectively aims to serve as a catalyst for the emergence of future sub-THz 6G mobile devices.11Nscopu

Measurement of craving among gamers with internet gaming disorder using repeated presentations of game videos: a resting-state electroencephalography study

Abstract Background Internet gaming disorder (IGD) is receiving increasing attention owing to its effects on daily living and psychological function. Methods In this study, electroencephalography was used to compare neural activity triggered by repeated presentation of a stimulus in healthy controls (HCs) and those with IGD. A total of 42 adult men were categorized into two groups (IGD, n = 21) based on Y-IAT-K scores. Participants were required to watch repeated presentations of video games while wearing a head-mounted display, and the delta (D), theta (T), alpha (A), beta (B), and gamma (G) activities in the prefrontal (PF), central (C), and parieto-occipital (PO) regions were analyzed. Results The IGD group exhibited higher absolute powers of DC, DPO, TC, TPO, BC, and BPO than HCs. Among the IGD classification models, a neural network achieves the highest average accuracy of 93% (5-fold cross validation) and 84% (test). Conclusions These findings may significantly contribute to a more comprehensive understanding of the neurological features associated with IGD and provide potential neurological markers that can be used to distinguish between individuals with IGD and HCs