A5031126514- Spine and Intervertebral Disc Pathology
- Spinal Fractures and Fixation Techniques
- Advanced ceramic materials synthesis
- Scoliosis diagnosis and treatment
- Aluminum Alloys Composites Properties
- 3D IC and TSV technologies
- Anesthesia and Pain Management
- Photonic Crystals and Applications
- Electronic Packaging and Soldering Technologies
- Advanced materials and composites
- Healthcare Education and Workforce Issues
- Diverse Approaches in Healthcare and Education Studies
- Musculoskeletal pain and rehabilitation
- Metamaterials and Metasurfaces Applications
- Health and Wellbeing Research
- Medical Imaging and Analysis
- Pelvic and Acetabular Injuries
- Spinal Hematomas and Complications
- Advanced Antenna and Metasurface Technologies
- Nanomaterials and Printing Technologies
- Nanofabrication and Lithography Techniques
- Pain Mechanisms and Treatments
- Advanced Photocatalysis Techniques
- Pharmacological Effects of Natural Compounds
- Ocular Surface and Contact Lens
Korea University
2019-2025
Ewha Womans University
2016-2024
Ewha Womans University Medical Center
2016-2024
Hansol Chemical (South Korea)
2020
University of Seoul
2002-2019
Lutronic (South Korea)
2017-2019
Seoul Medical Center
2017
Chung-Ang University
2012-2016
Centre for Addiction and Mental Health
2016
Inje University
2010-2014
Retrospective study.To report a technique of vertebral column resection through single posterior approach and its preliminary results in the treatment moderate to severe spinal deformities with limited flexibility.Vertebral is formidable operation reserved for flexibility. The authors devised that offers significant advantages over anterior-posterior resection.Seventy deformity patients treated by were reviewed. Minimum follow-up was 2 years (range 2-3.3 years). There 34 males 36 females...
Passive daytime radiative cooling, which is a process that removes excess heat to cold space as an infinite sink, emerging technology for applications require thermal control. Among the different structures of coolers, multilayer- and photonic-structured coolers are composed inorganic layers still need be simple fabricate. Herein, we describe fabrication nanoparticle-mixture-based cooler exhibits highly selective infrared emission low solar absorption. Al2O3, SiO2, Si3N4 nanoparticles...
A single-step printable platform for ultraviolet (UV) metasurfaces is introduced to overcome both the scarcity of low-loss UV materials and manufacturing limitations high cost low throughput. By dispersing zirconium dioxide (ZrO2) nanoparticles in a UV-curable resin, ZrO2 nanoparticle-embedded-resin (nano-PER) developed as material which has refractive index extinction coefficient from near-UV deep-UV. In nano-PER, resin enables direct pattern transfer increase composite while maintaining...
Abstract Metalenses have revolutionized optical technologies with their superior ability to manipulate light and the potential replace conventional, bulky components. However, commercialization is hindered by limitations in conventional manufacturing techniques, such as small patterning areas, low throughput, high cost. In this study, two methods are introduced for scalable wafer‐scale of metalenses operating near‐infrared region, aimed at overcoming abovementioned challenges. The first type...
A retrospective study was conducted.To determine the exact distal fusion level in treatment of single thoracic idiopathic scoliosis (King Types 3 and 4) with segmental pedicle screw fixation.Pedicle fixation effectively shortens extent by improved three-dimensional deformity correction. However, selection remains controversial scoliosis.This analyzed 42 patients adolescent (32 King 10 4 patients) who underwent had a minimum follow-up period 2 years (range, 2-6 years). The were grouped...
Abstract Nanoimprint lithography (NIL) has attracted attention recently as a promising fabrication method for dielectric metalenses owing to its low cost and high throughput, however, aspect ratio (HAR) nanostructures are required manipulate the full 2π phase of light. Conventional NIL using hard-polydimethylsiloxane (h-PDMS) mold inevitably incurs shear stress on which is inversely proportional surface area parallel direction detachment. Therefore, HAR structures subjected larger stresses,...
Abstract Metasurfaces, which are designed by arranging meta‐atoms, have attracted attention for their ability to create optical properties that do not exist in nature. However, previous methods fabricating metasurfaces using electron‐beam lithography (EBL) expensive and limited production capacity, inhibiting mass production. In this study, a new manufacturing method is demonstrated an argon fluoride (ArF) scanner nanoimprint (NIL) overcome these limitations. 266 millimeter‐scale fabricated...
The unique characteristics of metasurfaces to precisely control the amplitude, phase, and polarization light within a thin, flat footprint make them promising replacement for bulky optical components. However, fabrication methods conventional have suffered from low throughput high costs, limiting scalability practical application. To address these challenges, an advanced technique is developed by combining deep-ultraviolet argon fluoride photolithography with wafer-scale nanotransfer...
A retrospective study.To determine the indications of fusing proximal thoracic curve when treating idiopathic scoliosis with segmental instrumentation.Failure to recognize a significant often results in postoperative shoulder asymmetry due relative overcorrection lower curve. With instrumentation that enhances correction instrumented curve, double pattern needs fusion both and distal curves should be redefined.Forty patients adolescent right more than 40 degrees left 25 treated by pedicle...
This study verified the efficacy of segmental pedicle screw fixation in restoring thoracic kyphosis persons with hypokyphotic scoliosis. Fifty-one patients were divided into three groups by degree preoperative hypokyphosis and method used: hypokyphosis-hook (HH), hypokyphosis-screw (HS), normal kyphosis-screw (NS) group. They compared after a minimum follow-up period 2 years. Preoperative 4.1 degrees +/- 8.6 degrees, 8.1 5.6 27.3 9.8 HH, HS, NS restored to 14.5 10.2 11.3 28.3 13.7...
Metasurfaces consisting of artificially designed meta-atoms have been popularized recently due to their advantages amplitude and phase light control. However, the electron beam lithography method for metasurface fabrication has high cost low throughput, which results in a limitation metasurfaces. In this study, nanocomposite printing technology is used fabricate high-efficiency metasurfaces with cost. To demonstrate efficiency proposed method, metahologram fabricated using nanocomposite. The...
: Local infiltration analgesia (LIA) represents a potential approach to reducing pain in patients undergoing total hip arthroplasty (THA). The pericapsular nerve group (PENG) block also provides adequate for fractures and THA. As most surgeries use lateral incision, affecting the cutaneous supply by branches of femoral (LFCN), LFCN can contribute postoperative analgesia. However, no studies have investigated effectiveness supplemental PENG combined with LIA after fracture surgery. Our study...
Abstract Crystalline titanium dioxide (TiO 2 ) (anatase and rutile) possesses a higher refractive index than amorphous TiO near‐zero absorption in the visible region, making them an ideal material for metasurfaces. However, fabrication limitations hinder their implementation into flat optics. In this work, wafer‐scale manufacturing platform is proposed crystalline Sol–gel developed as printable which its phase can be precisely controlled to produce amorphous, anatase, or rutile, depending on...
With the growth of population older adults, cement-augmented pedicle screws (CAPS) have become more commonly employed. Although CAPS are considered safe, cement leakage can occur, leading to complications. Neurological symptoms resulting from bone pose significant challenges in both diagnosis and treatment. Unilateral biportal endoscopy (UBE) offers a minimally invasive solution for these issues. UBE enables thorough exploration potential compression sites, allowing precise visualization...
Abstract A metahologram is a nanostructured optical device designed to manipulate light at subwavelength scales, allowing the creation of highly efficient and precise holographic images. Because metaholograms are fabricated using electron‐beam lithography, their mass production inherently constrained by low writing speed high costs process. In this study, nanoimprint lithography (NIL) used transfer patterns onto 6‐in. substrates with fidelity. Large‐scale TiO 2 synthesized through sol‐gel...
Abstract Ischiofemoral impingement syndrome is an uncommon disorder defined by hip pain caused the narrowing of space between ischial tuberosity and lesser trochanter with associated entrapment quadratus femoris muscle. We effectively treated two male patients using ultrasound‐guided prolotherapy polydeoxyribonucleotide sodium mixed local anesthetics. A 24‐year‐old patient no history trauma or surgery complained bilateral groin pain; magnetic resonance imaging demonstrated slight...
In this study, a high-performance photoanode based on 3D periodic, micropillar-structured fluorine-doped tin oxide (FTO-MP) deposited with BiVO4 is fabricated using the patterned FTO by direct printing and spray pyrolysis, followed deposition of sputtering V ion heat-treatment FTO. The FTO-MP enables light scattering owing to its periodic structure increases absorption efficiency. addition, high electron mobility enlarged surface area enhance separation Due combination these enhancing...
Abstract Objective The purpose of this study was to adapt the pain DETECT Questionnaire ( PD ‐Q) into a Korean version KPD and validate it. Methods A single‐center prospective observational performed. During first phase study, linguistic adaptation carried out develop ‐Q. second feasibility, internal consistency, discriminant validity, concurrent validity were assessed for psychometric validation Results total 232 patients participated. Among them, 82 (35%) classified in neuropathic (NeP)...
Several daytime radiative cooling materials involving various structures and composed using multilayer thin films, polymers, nanoparticles have been fabricated studied. However, their surface is of white or some other monotonous color because the requirement for most incident sunlight to be reflected. A temperature‐sensitive colored (TCRC) material that provides efficient while preserving aesthetic properties has developed. The TCRC manufactured as a bilayer structure efferent applied on...
Abstract Metasurface‐based flat optics has a great potential to replace conventional bulky and heavy optical elements, consistent with the trend of miniaturizing elements. One trends is broaden operating area metasurface. The previous approaches are focused on expanding metasurface area, which intrinsic manufacturing limitations. Here, this work presents fabrication wafer‐scale metalens arrays, demonstrates Gabor superlens composed behaves optically like large lens system. A pair fabricated...