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With the rapid improvement of equipment integration technology, multi-spectrum detectors are integrated into compact volumes and widely used for object detection. Confront with this challenge, it is essential to propose a strategy to design a single-layer metasurface with multi-spectrum responses in microwave and infrared ranges. In this work, we proposed a method of designing meta-atoms, which is capable of achieving functional electromagnetic response at microwave and infrared individually. As a demonstration, a metasurface with four different occupation ratios and coding permutation features is designed, fabricated, and tested. In the microwave band, the pixel meta-atom is designed to realize highly efficient cross-polarization conversion between 5.0 and 10.0 GHz, which shows the metasurface can behave as ultra-low Radar Cross Section (RCS) reflectors in the working band; In the infrared band, different occupation ratio of meta-atoms are designed to realize the infrared emissivity from 0.60 to 0.80 in 3–14 μm, which can be used to exhibit digital infrared camouflage pattern. This work promotes the ability to use single-layer design to achieve digital infrared camouflage and microwave RCS reduction simultaneously. The one-layer design is simple in geometry, simplified in process, low cost in economy, and large scale in fabrication, which can promote practical use in compatible microwave stealth and infrared camouflage.

A circular phased array antenna that can generate orbital angular momentum (OAM) radio beams in the 10 GHz band is described. The antenna consists of eight inset-fed patch elements and a microstrip corporate feeding network. A full-wave electromagnetic simulator is used to aid the antenna design and theoretical simulations are confirmed by measurements.

This phenomenological study, guided by Radcliffe-(1881–1955) Brown's Structural Functionalism Theory, investigated how sign language inset was used for social inclusion during the 2019 Philippine State of the Nation Address on GMA Network, Inc. Eight participants' lived experiences were examined through in-depth interviews. Four major themes emerged: exposure and familiarization with the deaf community culture, which is the Filipino Sign Language (FSL); adjustment of the TV inset size for deaf visual signs recognition and understanding; validation of TV insets interpreting with a deaf consultant; accessibility to communication through clear policy and guidelines of TV inset interpreting. The study concludes that even though the sign language interpreters use FSL, we can only elicit social inclusion by adjusting the size of the TV inset; since the sign language insets require the visual signs of the SLIs, which include hand gestures and facial expressions. Moreover, a better understanding of the signs that consider both schooled and non-schooled Deaf requires the exposure and familiarization of SLIs with the deaf culture. Meanwhile, TV networks should consider adjusting the size of the TV inset, hiring a deaf consultant to validate signing, and ensuring deaf access to communication to integrate them socially. Sign language inset implementation requires a model to follow structurally to be functional.

Aseptic loosening of on-lay all-polyethylene cemented glenoid components in total shoulder arthroplasty is a leading cause of revision surgery and may be accelerated by the rocking-horse phenomenon. In response to this, inset glenoid implants have been developed in hopes that they will lead to lower loosening rates. Presently, little literature exists on the ideal depth of insetting to minimize micromotion while also considering glenoid bone preservation. This study, therefore, evaluated a generic circular inset glenoid component implanted at 4 depths in osteoarthritic glenoids using finite element models. Micromotion under simulated joint loading, bone removal, and underlying bone density were compared. The goal was to determine an optimal inset depth that minimizes micromotion while preserving glenoid bone. Finite element models of 7 male osteoarthritic scapulae were generated from pre-operative computed tomography scans. Circular inset glenoid components were virtually implanted at 4 depths: 25%, 50%, 75%, and 100% (inlay). Glenohumeral joint loading was simulated in 5 directions. Tangential (parallel) and normal (perpendicular) micromotions were measured across 6 backside regions of the component for each loading direction. The volume of bone removed for implantation and bone density within a 5-mm depth region beneath each component were also evaluated. No significant relationship was found between inset depth and tangential micromotion across load directions or locations (P > .05). The 25% depth showed the greatest median tangential micromotion in 12 of 42 cases (29%), the 50% and 100% depths in 11 cases each (26%), and the 75% depth in 8 cases (19%). Similarly, no significant relationship was observed between inset depth and normal micromotion. The 25% depth had the greatest median normal micromotion in 15 of 42 cases (36%), followed by 75% in 13 cases (31%), 50% in 8 cases (19%), and 100% in 6 cases (14%). Bone removal increased significantly with increasing inset depth (P < .05). On average, the 100% depth required approximately 4 times more bone removal than the 25% depth. Bone density within the 5-mm depth region beneath the component was highest at the 25% depth. Significant differences were observed between the 25% depth and the 50% (P = .03), 75% (P = .03), and 100% depths (P = .049), while no significant differences were found among the deeper depths. Inset depth was not significantly associated with glenoid component micromotion, although a trend toward reduced micromotion with greater depth was observed. However, deeper insetting required substantially more bone removal and was associated with lower underlying bone density. Considering implant stability, bone preservation, and supporting bone density, these findings support glenoid component insetting at approximately 25-50% depth.

This paper presents a compact design for a four-element multiple-input multiple-output (MIMO) antenna for millimeter-wave (mmWave) communications covering the bands of n257/n258/n261. The MIMO design covers the frequency range of 24.25–29.5 GHz, with a wide bandwidth of 5.25 GHz. The element of the MIMO antenna structure uses a single circular patch with an inset feed, and, in order to improve the reflection coefficient (S11), a half-disk parasitic patch is positioned on top of the circular patch. Moreover, to fine-tune the antenna’s characteristics, two vertical stubs on the extreme ends of the ground plane are introduced. For this design, a Rogers RT/Duroid 5880 substrate with ultra-thin thickness is used. After the optimization of the design, the four-port MIMO antenna attained a tiny size, with the dimensions 16.2 mm × 16.2 mm × 0.254 mm. In terms of the MIMO parameters, the ECC (Envelop Correlation coefficient) is less than 0.002 and the DG (Diversity Gain) is greater than 9.99 dB in the mentioned band, which are within the tolerance limits. Also, in spite of the very small size and the four-port configuration, the achieved isolation between the neighboring MIMO elements is less than −23.5 dB.

A three-dimensional (3-D) analytical model with a high computational efficiency is proposed for a surface-inset axial flux machine (SIAFM). Accounting for the air-gap fringing field, the proposed 3-D analytical model is used to compute the magnetic field in the SIAFMs with conventional, Hat- and T-shaped Halbach arrangements. Based on the linear superposition method, the 3-D scalar potential equations for different regions with boundary condition equations are obtained. On this basis, the air-gap magnetic field and electromagnetic parameters can be derived. To demonstrate the advantages, the optimization performance of the T-shaped Halbach machine model is compared with that of conventional and Hat-shaped Halbach machine models. The prediction indicates that the optimized T-shaped Halbach machine model has the greatest electromagnetic torque. Finally, a 3-D finite element analysis (FEA) validates the 3-D analytical predictions.

Electric mountain bikes (eMTBs) demand compact, high-torque motors capable of handling steep terrain and variable load conditions. Surface-mounted permanent magnet synchronous motors (SPMSMs) are widely used in this application due to their simple construction, ease of manufacturing, and cost-effectiveness. However, SPMSMs inherently lack reluctance torque, limiting their torque density and performance at high speeds. While interior PMSMs (IPMSMs) can overcome this limitation via reluctance torque, they require complex rotor machining and may compromise mechanical robustness. This paper proposes a surface-inset PMSM topology as a compromise between both approaches—introducing reluctance torque while maintaining a structurally simple rotor. The proposed motor features inset magnets shaped with a tapered outer profile, allowing them to remain flush with the rotor surface. This geometric configuration eliminates the need for a retaining sleeve during high-speed operation while also enabling saliency-based torque contribution. A baseline SPMSM design is first analyzed through finite element analysis (FEA) to establish reference performance. Comparative simulations show that the proposed design achieves a 20% increase in peak torque and a 33% reduction in current density. Experimental validation confirms these findings, with the fabricated prototype achieving a torque density of 30.1 kNm/m3. The results demonstrate that reluctance-assisted torque enhancement can be achieved without compromising mechanical simplicity or manufacturability. This study provides a practical pathway for improving motor performance in eMTB systems while retaining the production advantages of surface-mounted designs. The surface-inset approach offers a scalable and cost-effective solution that bridges the gap between conventional SPMSMs and more complex IPMSMs in high-demand e-mobility applications.

In this paper, Pyralux—a modern, ultra-thin, and acrylic-based laminate—was tested as a substrate of a microstrip antenna to examine the antenna characteristics when it is built on such a thin, flexible, and robust dielectric material, with the idea of eventually serving in wearable antennas in the context of smart-clothing applications. We particularly discuss the sensitivity of the design and fabrication of an inset-fed rectangular microstrip antenna (IRMA) in terms of its inset gap width when it is designed in the S-frequency band. The simulated and measured results showed a very small feasible range for the inset gap dimension with respect to the feed line width. Ultimately, an IRMA was successfully designed, fabricated, and tested with both SMA and U.FL connectors. The impedance bandwidth, in either case, was about 2%, the average value of directivity was 5.8 dB, and the realized efficiency was 2.67%, while the 3-dB beamwidths in the E-plane and the H-plane were 90° or wider.

This paper presents the world’s smallest inset permanent magnet synchronous motor (PMSM) with a soft magnetic composite (SMC) core, providing ease of manufacturing for micromachine applications without silicon steel laminations. The inset motor can offer an additional reluctance torque and higher torque density with a lower usage amount of permanent magnet. A 15 mm diameter inset motor was developed with the thickness of a tile-type permanent magnet which is limited to 1 mm by the manufacturer. The motor was designed with high torque density and low torque ripple by varying the interpole iron width for the rotor. Two inset motors were made using both SMC and silicon steel materials for comparison. The performance of the SMC motor was inferior to the silicon steel motor, but it still meets the specifications of the commercial market. If the thickness of the tile-type permanent magnet is further reduced, the micro inset motor with a SMC core can be easily mass-manufactured using powder sintering.

This paper presents a new configuration of a slotted waveguide antenna (SWA) array aimed at the X-band within the desired band of 9.38~9.44 GHz for shipboard marine radars. The SWA array, which typically consists of a slotted waveguide, a polarizing filter, and a metal reflector, is widely employed in marine radar applications. Nonetheless, conventional slot array designs are weighty, mechanically complex, and geometrically large to obtain high performances, such as gain. These features of the conventional SWA are undesirable for the shipboard marine radar, where the antenna rotates at high angular speed for the beam scanning mechanism. The proposed SWA array herein reduces the conventional design’s size by 62% using a tapered dielectric-inset guide structure. It shows high gain performance (up to 30 dB) and obtains improvements in radiation efficiency (up to 80% in the numerical simulations) and weight due to the use of loss and low-density dielectric material.