Seung Yoon Lee

Wavefront control in valley Hall photonic topological insulators via sub-element rotation

Yuheng He, Seung Yoon Lee, Nima Ghalichechian

This study presents a sub-element rotation-based symmetry-breaking mechanism for a quantum valley Hall photonic topological insulator (PTI) with a bandgap of 15.8–19.0 GHz. The topological phase is switched between the K and K′ points in a hexagonal lattice space by selectively rotating …

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Risk of Orthostatic Hypotension in Chronic Kidney Disease: A Community-Based Cohort Study

Chan Young Park, Seung Yoon Lee, Ji Eun Kim

INTRODUCTION: Patients with chronic kidney disease (CKD) often experience symptoms consistent with orthostatic hypotension (OH); however, not much is known about OH in this population. Therefore, study analyzed OH prevalence and risk according to renal function decline. METHODS: A community-based cohort study …

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Assessing the impact of sodium intake on kidney function deterioration and proteinuria in the general population: A prospective cohort study

Seung Yoon Lee, Ji Eun Kim

Excessive sodium intake is recognized as a potential risk factor for various diseases, including kidney disease. However, limited research has been conducted on the relationship between sodium intake and kidney disease in the general population. This study aimed to explore the association …

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Curcumin and omega-3 ameliorate experimental osteoarthritis progression in terms of joint pain and mitochondrial dysfunction

JooYeon Jhun, Donghwan Lee, Hyun Sik Na, Keun-Hyung Cho et autres

BACKGROUND: Osteoarthritis (OA), a chronic degenerative disorder, induces pain, joint inflammation, and destruction of the articular cartilage matrix. Curcumin and omega-3 have been used as dietary supplements for OA due to their anti-inflammatory and antioxidant properties. However, there is no evidence demonstrating …

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History and Latest Progress in Antenna Packaging Technology: Part 2: Emerging materials and solutions

Seung Yoon Lee, Dongseop Lee, Yueping Zhang, Wonbin Hong et autres

In Part 2 of this review article, we discuss antenna-on-chip (AoC) solutions for highly integrated millimeter-wave (mm-wave) devices in wireless communications. We also analyze multiple solutions to address the low antenna efficiency of Si substrates, one of the key limitations of AoCs. …

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On-Chip Dielectric Resonator Antenna on Silicon Carbide Substrate for Extreme Environments

Sree Adinarayana Dasari, Seung Yoon Lee, Nima Ghalichechian

We present the design, fabrication, and high-temperature measurement of a highly efficient (91.5%) on-chip dielectric resonator antenna (DRA) on silicon carbide (SiC). The simulations were validated through measurements of return loss and peak gain up to 400$^{\circ }$C, along with radiation pattern …

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History and the Latest Progress in Antenna Packaging Technology: Part 1: Multilayer solutions

Seung Yoon Lee, Dongseop Lee, Yueping Zhang, Wonbin Hong et autres

The demand for millimeter-wave (mmWave) bands is growing due to the need for high-throughput communications, high-resolution sensing, and data-intensive applications such as massive Internet of Things (IoT), virtual reality, augmented reality, and metaverse platforms. Designing antennas for mmWave bands, unlike traditional microwave …

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Silicon-based, Dual-Polarized Aperture-Coupled mmWave On-Chip Antenna Arrays

Seung Yoon Lee, Sree Adinarayana Dasari, Walter Disharoon, David L. West et autres

We report V-band dual-polarized aperture-coupled on-chip antennas where the radiating patch is patterned on the Si substrate instead of the dielectric interconnect layers, eliminating the need for lossy thru-Si vias or wirebonds for interconnection. An asymmetric cross-shaped slot is employed to minimize …

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Correction: A green-lipped mussel reduces pain behavior and chondrocyte inflammation and attenuated experimental osteoarthritis progression

JooYeon Jhun, Hyun Sik Na, Keun-Hyung Cho, Jiyoung Kim et autres

[This corrects the article DOI: 10.1371/journal.pone.0259130.].

Towards Harsh Environment Silicon Carbide Based On-Chip Antenna

Sree Adinarayana Dasari, Seung Yoon Lee, Nima Ghalichechian

This paper presents an on-chip dielectric resonator antenna (DRA) based on silicon carbide (SiC). SiC is a semiconductor material known for its large bandgap, high dielectric breakdown, and temperature-stable dielectric properties, making it well-suited for harsh environment electronics. We propose a DRA …

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Time-Money Choices in Virtual Environments: A Structural Approach to Player Monetization

Seung Yoon Lee, K. Sudhir, Kosuke Uetake

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A Bioresorbable Backscatter Sensor Facilitated by IDCs Loaded SRR for pH Monitoring

Yuheng He, Chinaza Ogbonna, Sree Adinarayana Dasari, Seung Yoon Lee et autres

We present the design, simulation, fabrication, and measurement results of a biodegradable sensor for postoperative monitoring. The proposed sensor is composed of a modified split-ring resonator (SRR) loaded with interdigitated capacitors (IDCs). The sensor operates at around 3.2 GHz in free space …

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