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Pediatric schwannoma of the tongue:A case report and review of literature

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World Journal of Clinical Cases 2021年第24期9卷 7212-7217页

作者： Chang Bin Yun Young-Mo Kim jeong-seok choi Ji Won Kim Department of Otorhinolaryngology-Head and Neck Surgery Inha University College of MedicineIncheon 22212South Korea

BACKGROUND Neurogenic tumors account for about ten percent of all tumors of childhood,and benign tumor originating from Schwann cells is rare in peripheral *** of the tongue is quite rare in *** SUMMARY We present the case of an 8-year-old male with schwannoma in the anterolateral *** mass was slow-growing for one year with no pain and *** underwent transoral mass excision under general *** examination revealed a smooth surfaced,17 mm×14 mm×7 mm sized,encapsulated nodule with a clear resection *** of the tongue was confirmed by the pathological *** reported no motor or sensory change,such as dysgeusia or paresthesia,or phonation difficulty during postoperative 12 mo *** Schwannoma of the tongue is a rare benign neoplasm in *** a painless firm mass is encountered in the tongue of a child,solid tumors like schwannoma should be considered in the differential diagnosis.

关键词： Schwannoma Tongue Child Pediatric Neurogenic Tumor Case report

Enhanced performance of solution-processed carbon nanotube transparent electrodes in foldable perovskite solar cells through vertical separation of binders by using eco-friendly parylene substrate

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Carbon Energy 2024年第7期6卷 83-93页

作者： Unsoo Kim jeong-seok Nam Jungjin Yoon Jiye Han Mansoo choi Il Jeon Department of Mechanical Engineering Seoul National UniversitySeoulRepublic of Korea Global Frontier Center for Multiscale Energy Systems Seoul National UniversitySeoulRepublic of Korea Frontier Energy Solution SeoulRepublic of Korea Department of Nano Engineering Department of Nano Science and TechnologySKKU Advanced Institute of Nanotechnology(SAINT)Sungkyunkwan University(SKKU)SuwonRepublic of Korea Department of Materials Science and Engineering Pennsylvania State UniversityUniversity ParkPennsylvaniaUSA

The successful utilization of an eco-friendly and biocompatible parylene-C substrate for high-performance solution-processed double-walled carbon nanotube(CNT)electrode-based perovskite solar cells(PSCs)was *** the use of a novel inversion transfer technique,vertical separation of the binders from the CNTs was induced,rendering a stronger p-doping effect and thereby a higher conductivity of the *** resulting foldable devices exhibited a power conversion efficiency of 18.11%,which is the highest reported among CNT transparent electrode-based PSCs to date,and withstood more than 10,000 folding cycles at a radius of 0.5 mm,demonstrating unprecedented mechanical ***,solar modules were fabricated using entirely laser scribing processes to assess the potential of the solution-processable nanocarbon ***,this is the only one to be processed entirely by the laser scribing process and to be biocompatible as well as eco-friendly among the previously reported nonindium tin oxide-based perovskite solar modules.

关键词： double-walled carbon nanotubes parylene substrates perovskite modules perovskite solar cells solution-processable electrodes surfactant removal

Invariant operator theory for the single-photon energy in time-varying media

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Chinese Physics B 2010年第1期19卷 56-60页

作者： choi jeong-Ryeol School of Electrical Engineering and Computer Science Kyungpook National University

After the birth of quantum mechanics, the notion in physics that the frequency of light is the only factor that determines the energy of a single photon has played a fundamental role. However, under the assumption that the theory of Lewis-Riesenfeld invariants is applicable in quantum optics, it is shown in the present work that this widely accepted notion is valid only for light described by a time-independent Hamiltonian, i.e., for light in media satisfying the conditions, ε（t） = ε（0）, u（t） = u（0）, and σ（t） = 0 simultaneously. The use of the Lewis Riesenfeld invariant operator method in quantum optics leads to a marvelous result： the energy of a single photon propagating through time-varying linear media exhibits nontrivial time dependence without a change of frequency.

关键词： single-photon energy invariant operator theory time-varying media

An approach to dark energy problem through linear invariants

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Chinese Physics C 2011年第3期35卷 233-242页

作者： jeong Ryeol choi Department of Radiologic Technology Daegu Health College Division of Semiconductor and Display Engineering College of IT EngineeringKyungpook National University

The time evolution of vacuum energy density is investigated in the coherent states of inflationary universe using a linear invariant approach. The linear invariants we derived are represented in terms of annihilation operators. On account of the fact that the coherent state is an eigenstate of an annihilation operator, the wave function in the coherent state is easily evaluated by solving the eigenvalue equation of the linear invariants. The expectation value of the vacuum energy density is derived using this wave function. Fluctuations of the scalar field and its conjugate momentum are also investigated. Our theory based on the linear invariant shows that the vacuum energy density of the universe in a coherent state is decreased continuously with time due to nonconservative force acting on the coherent oscillations of the scalar field, which is provided by the expansion of the universe. In effect, our analysis reveals that the vacuum energy density decreases in proportion to t-β where β is 3/2 for radiation-dominated era and 2 for matter-dominated era. In the case where the duration term of radiation-dominated era is short enough to be negligible, the estimation of the relic vacuum energy density agrees well with the current observational data.

关键词： cosmological constant problem vacuum energy density coherent state linear invariant

Highly Concentrated,Conductive,Defect-free Graphene Ink for Screen-Printed Sensor Application

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Nano-Micro Letters 2021年第6期13卷 17-30页

作者： Dong seok Kim Jae-Min jeong Hong Jun Park Yeong Kyun Kim Kyoung G.Lee Bong Gill choi Department of Chemical Engineering Kangwon National UniversitySamcheokGangwon-do 25913Republic of Korea Resources Utilization Research Center Korea Institute of Geoscience and Mineral ResourcesDaejeon 34132Republic of Korea Center for Nano Bio Development National Nanofab CenterDaejeon 34141Republic of Korea

Conductive inks based on graphene materials have received significant attention for the fabrication of a wide range of printed and flexible ***,the application of graphene fillers is limited by their restricted mass production and the low concentration of their *** this study,a highly concentrated and conductive ink based on defect-free graphene was developed by a scalable fluid dynamics process.A high shear exfoliation and mixing process enabled the production of graphene at a high concentration of 47.5 mg mL^(−1)for graphene *** screen-printed graphene conductor exhibits a high electrical conductivity of 1.49×10^(4)S m^(−1)and maintains high conductivity under mechanical bending,compressing,and fatigue *** on the as-prepared graphene ink,a printed electrochemical sodium ion(Na^(+))sensor that shows high potentiometric sensing performance was ***,by integrating a wireless electronic module,a prototype Na^(+)-sensing watch is demonstrated for the real-time monitoring of the sodium ion concentration in human sweat during the indoor exercise of a *** scalable and efficient procedure for the preparation of graphene ink presented in this work is very promising for the low-cost,reproducible,and large-scale printing of flexible and wearable electronic devices.

关键词： Graphene ink Fluid dynamics Screen printing Ion sensor Real-time monitoring

Chronic gastrointestinal symptoms and quality of life in the Korean population

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World Journal of Gastroenterology 2008年第41期14卷 6388-6394页

作者： jeong-Jo jeong Myung-Gyu choi Young-seok Cho Seung-Geun Lee Jung-Hwan Oh Jae-Myung Park Yu-Kyung Cho In-seok Lee Sang-Woo Kim Sok-Won Han Kyu-Yong choi In-Sik Chung Department of Internal Medicine the Catholic University of Korea Department of Biostatistics University of North Carolina at Chapel Hill NC

AIM： To evaluate the prevalence of chronic gastroin- testinal symptoms and their impact on health-related quality of life （HRQOL） in the Korean population. METHODS： A cross-sectional survey, using a reliable and valid Rome I] based questionnaire, was per- formed on randomly selected residents, between 18 and 69 years in age. All respondents were interviewed at their homes or offices by a team of interviewers. The impact of chronic gastrointestinal symptoms on HRQOL was assessed using the Korean version of the 36-item Short-Form general health survey （SF-36）. RESULTS： Of the 1807 eligible subjects, 1417 （78.4%： male 762; female 655） were surveyed. Out of the respondents, 18.6% exhibited at least one chronic gastrointestinal symptom. The prevalence of gastro- esophageal reflux disease （GERD）, defined as heart- burn and/or acid regurgitation experienced at least weekly, was 3.5% （95% CI, 2.6-4.5）. The prevalence of uninvestigated dyspepsia, irritable bowel syndrome （IBS） and chronic constipation based on Rome Ⅱ criteria were 11.7% （95% CI, 10.1-13.5）, 2.2% （95% CI, 1.5-3.1）, and 2.6% （95% CI, 1.8-3.5） respectively. Compared with subjects without chronic gastrointesti- nal symptoms （n = 1153）, those with GERD （n = 50）, uninvestigated dyspepsia （n = 166） and IBS （n = 31） had significantly worse scores on most domains of the SF-36 scales. CONCLUSION： The prevalence of GERD, uninvesti- gated dyspepsia and IBS were 3.5%, 11.7% and 2.2% respectively, in the Korean population. The health- related quality of life was significantly impaired in subjects with GERD, uninvestigated dyspepsia and IBS in this community.

关键词： Chronic gastrointestinal symptom Gastroesophageal reflux disease Dyspepsia Irritable bowel syndrome Qaulibl of life

Two-dimensional Dirac plasmon-polaritons in graphene,3D topological insulator and hybrid systems

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Light(Science & Applications) 2022年第11期11卷 2602-2616页

作者： Chihun In Un jeong Kim Hyunyong choi Department of Physics Freie Universitat BerlinBerlin 14195Germany Department of Physical Chemistry Fritz-Haber-lInstitute of the Max-Planck-SocietyBerlin 14195Germany Department of Physics and Astronomy Seoul National UniversitySeoul 08826Republic of Korea Institute of Applied Physics Seoul National UniversitySeoul 08826Republic of Korea Advanced Sensor Laboratory Samsung Advanced Institute of TechnologySuwonGyeonggido 16419Republic of Korea

Collective oscillations of massless particles in two-dimensional(2D)Dirac materials offer an innovative route toward implementing atomically thin devices based on low-energy quasiparticle *** confinement of nearfield distribution on the 2D surface is essential to demonstrate extraordinary optoelectronic functions,providing means to shape the spectral response at the mid-infrared(IR)*** the dynamic polarization from the linear response theory has successfully accounted for a range of experimental observations,a unified perspective was stll elusive,connecting the state-of-the-art developments based on the 2D Dirac ***,we review recent works on graphene and three-dimensional(3D)topological insulator(TI)plasmon-polariton,where the mid-IR and terahertz(THz)radiation experiences prominent confinement into a deep-subwavelength scale in a novel optoelectronic *** presenting general light-matter interactions between 2D Dirac plasmon and subwavelength quasiparticle excitations,we introduce various experimental techniques to couple the plasmonpolaritons with electromagnetic *** and optical controls over the plasmonic excitations reveal the hybridized plasmon modes in graphene and 3D Tl,demonstrating an intense near-field interaction of 2D Dirac plasmon within the highly-compressed *** findings can further be applied to invent optoelectronic biomolecular sensors,atomically thin photodetectors,and laser-driven light sources.

关键词： structure Dirac topological

Gene editing particle system as a therapeutic approach for drug-resistant colorectal cancer

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Nano Research 2020年第6期13卷 1576-1585页

作者： Jee-Yeon Ryu You Jung choi Eun-jeong Won Emmanuel Hui Ho-Shik Kim Young-seok Cho Tae-Jong Yoon Laboratory of Nanopharmacy College of PharmacyResearch Institute of Pharmaceutical Science and Technology(RIPST)Ajou UniversitySuwon16499Republic of Korea Division of Gastroenterology Department of Internal MedicineSeoul St.Mary’s HospitalCollege of MedicineThe Catholic University of KoreaSeoul06591Republic of Korea Moogene Medi Co. Ltd.Seongnam13488Republic of Korea

The epidermal growth factor receptor(EGFR)pathway plays an important role in the progression of colorectal cancer(CRC).Anti-EGFR drugs based on antibodies have been widely used for treating CRC through inducing the cell death ***,the majority of CRC patients will inevitably develop drug-resistance during anti-EGFR drug treatment,which is mainly caused by a point mutation in the KRAS *** developed a nanoliposomal(NL)particle containing the Cas9 protein and a single-guide RNA(sgRNA)complex(Cas9-RNP),for genomic editing of the KRAS *** NL particle is composed of bio-compatible lipid compounds that can effectively encapsulate *** modifying the NL particle to include the appropriate antibody,it can specifically recognize EGFR expressing CRC and effectively deliver the gene-editing *** conditions of NL treatment were optimized using a KRAS mutated CRC in vivo mouse *** with KRAS-mutated CRC showed drug resistance against cetuximab,a therapeutic antibody *** treating the mice with the KRAS gene-editing NL particles,the implanted tumors showed a dramatic decrease in *** results demonstrated that this genomic editing complex has great potential as a therapeutic carrier system for the treatment of drug-resistant cancer caused by a point mutation.

关键词： nanoliposome clustered regularly interspaced short palindromic repeat and associated Cas9 nuclease(CRISPR/Cas9) KRAS mutation drug-resistance colorectal cancer

Quantum-classical correspondence for the inverted oscillator

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Chinese Physics C 2017年第11期41卷 56-62页

作者： Mustapha Maamache jeong Ryeol choi Laboratoire de Physique Quantique et Systèmes Dynamiques Faculté des SciencesUniversité Ferhat Abbas Sétif 1 Sétif 19000 Department of Radiologic Technology Daegu Health College

While quantum-classical correspondence for a system is a very fundamental problem in modern physics,the understanding of its mechanism is often elusive,so the methods used and the results of detailed theoretical analysis have been accompanied by active *** this study,the differences and similarities between quantum and classical behavior for an inverted oscillator have been analyzed based on the description of a complete generalized Airy function-type quantum wave *** inverted oscillator model plays an important role in several branches of cosmology and particle *** quantum wave packet of the system is composed of many sub-packets that are localized at different positions with regular intervals between *** is shown from illustrations of the probability density that,although the quantum trajectory of the wave propagation is somewhat different from the corresponding classical one,the difference becomes relatively small when the classical excitation is sufficiently *** have confirmed that a quantum wave packet moving along a positive or negative direction accelerates over time like a classical *** these main interpretations and others in the text,we conclude that our theory exquisitely illustrates quantum and classical correspondence for the system,which is a crucial concept in quantum mechanics.

关键词： quantum-classical correspondence inverted oscillator quantum wave packet