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A Steam-Plasma Igniter for Aluminum Powder Combustion

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Plasma Science and Technology 2015年第5期17卷 392-401页

作者： Sanghyup LEE kwanyoung noh Jihwan LIM Woongsup YOON Mechanical Engineering Department of Yonsei University

High-temperature ignition is essential for the ignition and combustion of energetic metal fuels, including aluminum and magnesium particles which are protected by their high- melting-temperature oxides. A plasma torch characterized by an ultrahigh-temperature plasma plume fulfills such high-temperature ignition conditions. A new steam plasma igniter is designed and successfully validated by aluminum power ignition and combustion tests. The steam plasma rapidly stabilizes in both plasma and steam jet modes. Parametric investigation of the steam plasma jet is conducted in terms of arc strength. A high-speed camera and an oscilloscope method visualize the discharge characteristics, and optical emission spectroscopy measures the thermochemical properties of the plasma jet. The diatomic molecule OH fitting method, the Boltzmann plot method, and short exposure capturing with an intensified charge coupled device record the axial distributions of the rotational gas temperature, excitation temperature, and OH radical distribution, respectively. The excitation temperature at the nozzle tip is near 5500 K, and the gas temperature is 5400 K.

关键词： steam plasma igniter aluminum emission spectroscopy energetic metal fuels powder ignition and combustion optical

Analysis of Aluminum Dust Cloud Combustion Using Flame Emission Spectroscopy

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光谱学与光谱分析 2015年第9期35卷 2431-2438页

作者： Sanghyup Lee kwanyoung noh Woongsup Yoon Advanced Energy and Propulsion Laboratory Department of Mechanical EngineeringYonsei University

In this study,aluminum flame analysis was researched in order to develop a measurement method for high-energy-density metal aluminum dust cloud combustion,and the flame temperature and UV-VIS-IR emission spectra were precisely measured using a *** the micron-sized aluminum flame temperature was higher than 2 400 K,Flame temperature was measured by a non-contact optical technique,namely,a modified two-color method using 520 and 640nm light,as well as by apolychromatic fitting *** methods were applied experimentally after accurate *** flame temperature was identified to be higher than 2 400 Kusing both *** analyzing the emission spectra,we could identify AlO radicals,which occur dominantly in aluminum *** study paves the way for realization of a measurement technique for aluminum dust cloud combustion flames,and it will be applied in the aluminum combustors that are in development for military purposes.

关键词： Aluminum combustion Flame characteristics High-temperature measurement Emission spectroscopy Diagnostics

Data driven prediction of fragment velocity distribution under explosive loading conditions

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Defence Technology(防务技术) 2025年第1期43卷 109-119页

作者： Donghwan noh Piemaan Fazily Songwon Seo Jaekun Lee Seungjae Seo Hoon Huh Jeong Whan Yoon Department of Mechanical Engineering Korea Advanced Institute of Science and Technology291 Daehak-roYuseong-guDaejeon 34141Republic of Korea Warhead System Team Precision Firepower Research DivisionPOONGSAN Defense R&D Institute2606-10 Hoguk-roAngang-OupKyung JuKyung-BukRepublic of Korea School of Engineering Deakin UniversityWauran PondsVIC 3216Australia

This study presents a machine learning-based method for predicting fragment velocity distribution in warhead fragmentation under explosive loading *** fragment resultant velocities are correlated with key design parameters including casing dimensions and detonation *** paper details the finite element analysis for fragmentation,the characterizations of the dynamic hardening and fracture models,the generation of comprehensive datasets,and the training of the ANN *** results show the influence of casing dimensions on fragment velocity distributions,with the tendencies indicating increased resultant velocity with reduced thickness,increased length and *** model's predictive capability is demonstrated through the accurate predictions for both training and testing datasets,showing its potential for the real-time prediction of fragmentation performance.

关键词： Data driven prediction Dynamic fracture model Dynamic hardening model Fragmentation Fragment velocity distribution High strain rate Machine learning

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敏感性皮肤的发病机制及治疗进展

皮肤性病诊疗学杂志 2025年第02期 140-148页

作者： noh Youngji 曹婷叶城斌邹颖同济大学附属皮肤病医院

敏感性皮肤(SS)的发病机制复杂，包括皮肤的屏障功能受损、皮肤表面微生态失衡、皮肤的感觉神经系统及血管的反应异常、免疫和炎症反应异常等。在治疗策略上，研究主要聚焦于以下几方面修复皮肤屏障：使用含有神经酰胺、透明质酸等成分... 详细信息

敏感性皮肤(SS)的发病机制复杂，包括皮肤的屏障功能受损、皮肤表面微生态失衡、皮肤的感觉神经系统及血管的反应异常、免疫和炎症反应异常等。在治疗策略上，研究主要聚焦于以下几方面修复皮肤屏障：使用含有神经酰胺、透明质酸等成分的保湿剂，减少水分流失并增强屏障功能；降低感觉神经的高反应性，借助TRPV1/TRPV4拮抗剂和抗炎成分降低神经活跃度，缓解不适症状；通过益生菌制剂等调节菌群失衡来缓解皮肤炎症。需要同时针对多个层面系统治疗。本文综述近年来SS发病机制的研究进展，分析各因素之间的相互作用，并为未来研究及临床干预提供科学依据。

关键词：敏感性皮肤发病机制皮肤屏障皮肤微生物治疗

Clinical and endoscopic characteristics of colorectal traditional serrated adenomas with dysplasia/adenocarcinoma in a Korean population

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World Journal of Gastrointestinal Oncology 2025年第2期17卷 119-131页

作者： Ki-Hyun Kim Eun Myung Hyung Hoon Oh Chan-Muk Im Young-Eun Seo Je-Seong Kim Chae-June Lim Ga-Ram You Sung-Bum Cho Wan-Sik Lee Myung-Giun noh Kyung-Hwa Lee Young-Eun Joo Department of Internal Medicine Chonnam National University Medical SchoolHwasun-eup 58128South Korea Department of Pathology Chonnam National University Medical SchoolHwasun-eup 58128South Korea

BACKGROUND Traditional serrated adenoma(TSA)is a rare and precancerous lesion of colorectal *** clinical and endoscopic differentiations between TSAs without dysplasia or adenocarcinoma(TSAOs)and TSAs with dysplasia or adenocarcinoma(TSADs)remain *** To evaluate the characteristics of colorectal TSAs and compare the characteristics of TSAOs with those of *** This retrospective study included 193 patients who underwent endoscopic resection and received a pathologic diagnosis of *** reviewed the medical,endoscopic,and histopathologic records of patients who underwent endoscopic resection of TSAs between January 2010 and December *** TSAs were more frequently located in the rectosigmoid *** TSAs had 0-Ip,0-Isp,or 0-Is *** TSAD lesions were larger than TSAO *** lesions more commonly had a red color and an irregular border than TSAO *** were usually treated using conventional endoscopic mucosal resection,whereas TSADs were treated using conventional endoscopic mucosal resection,endoscopic submucosal dissection,and ***-polypectomy bleeding was more common with TSADs than with *** analysis showed that gastrointestinal bleeding,red color,0-IIa,irregular border,and lobular mucosal surface were significantly associated with *** analysis showed that gastrointestinal bleeding,an irregular border,and a lobular mucosal surface were significantly associated with *** TSAs with gastrointestinal bleeding,an irregular border,and a lobular mucosal surface are associated with an increased risk of dysplasia or adenocarcinoma.

关键词： Traditional serrated adenoma Dysplasia Carcinoma Endoscopic features Gastrointestinal bleeding

Recent trends in metal ion based hydrogel biomaterials for tissue engineering and other biomedical applications

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Journal of Materials Science & Technology 2021年第4期63卷 35-53页

作者： Gopinathan Janarthanan Insup noh Department of Chemical and Biomolecular Engineering Seoul National University of Science and TechnologySeoul01811Republic of Korea Convergence Institute of Biomedical Engineering and Biomaterials Seoul National University of Science and TechnologySeoul01811Republic of Korea

Recently,the metal ion cross-linked hydrogels have gained enormous interest because of its excellent properties like self-healing,fast recovery,biocompatibility and high mechanical properties combined with multi-stimuli *** this review article,we have summarized the recent trends in the development of metal ion cross-linked hydrogels for tissue engineering and biomedical applications.A number of metal ions and their contribution in the synthesis of various cross-linked hydrogels are discussed with respect to their crosslinking mechanisms,compositions,physio-chemical and biological properties.A special emphasis has been given to ferric(Fe^(3+))ion cross-linked hydrogels and their different combinations owing to their numerous researches reported in the recent past with exceptional *** application of these metal ion based hydrogels in biomedical applications including tissue engineering,sensing,wound healing,drug delivery and as tissue adhesive and tissue sealants are reviewed with specific ***,the application of these metal ion cross-linked hydrogels as inks in 3 D printing is explained in a separate ***,the possible toxic effects of the different metal ions and their effects have been *** directions and comprehensive applications of the hydrogels are highlighted.

关键词： properties. biomaterials exceptional

URECA:Efficient Resource Location Middleware for Ubiquitous Environment

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Journal of Computer Science & Technology 2008年第6期23卷 929-943页

作者： Donggeon noh Heonshik Shin Mobile System and Software Laboratory School of Computer Science and EngineeringSeoul National University

We describe an effective resource location framework for ubiquitous computing environments populated by a diverse set of networks, devices, services and computational entities. Our framework provides context adaptation with the aid of a middleware service to improve the quality of resource location. A resource location protocol suitable to each type of network locates resource effectively by means of dynamic reconfiguration to the current context. Our framework is also refined by support for interoperability between different types of resource location protocols occurring across a hybrid ubiquitous network. These characteristics also reduce the control overhead for resource location, saving resource, decreasing latency and permitting a considerable degree of scalability.

关键词： resource location resource discovery middleware context-aware interoperability ubiquitous

UV Photolysis of N2O Isotopomers： Isotopic Fractionations and Product Rotational Quantum State Distributions

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Chinese Journal of Chemical Physics 2011年第6期24卷 679-685,I0003页

作者： Mohammad noh Daud 吉隆坡马来亚大学化学系吉隆坡50603

The time-dependent quantum wave packet method is used to study the dynamics of the pho- todissociation processes for the isotopomers 14N14N16O, 14N15N16O, 15N14N16O, 15N15N16O, 14N14N17O, and 14N14N18O. In general, the computed isotopic fractionation factors derived from the absorption cross sections of five heavy isotopomers are in good agreement with the experimental results. Relative to the 14NI4N16O isotopomer, the N2 rotational state distributions for the isotopically nitrogen substituted N2O are found to be entirely shifted to higher rotational states. Similar to its isotopic fractionation factors, the N2 rotational state distributions for the asymmetric isotopomers 14N15N16O and 15N14N16O are found to be observably different.

关键词： Time-dependent wavepacket Isotopic fractionation Product rotational distribution

Rare earth double activated phosphors for different applications

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Journal of Rare Earths 2010年第S1期28卷 1-11页

作者： Mihail Nazarov Do Young noh Department of Materials Science and Engineering Gwangju Institute of Science and Technology1 Oryong-dongBuk-guGwangju 500-712Republic of Korea

For the purpose of development of highly energy-efficient light sources,one needs to design highly efficient green,red and yellow phosphors,which are able to absorb excitation energy and generate *** this contribution,we present our results on producing some efficient phosphors with improved luminescence *** double activation,energy could be transferred from one luminescent activator to the other one,resulting in more efficient or brighter device ***-activators could be added to a host material to change the color of the emitted *** incorporation of Eu3+ or Tb3+ ions into the CaWO4 crystal lattice modified the luminescence spectrum due to the formation of the emission centers that generated the specific red and green *** efficient new red phosphors based on YNbO4 and doped by Eu3+,Ga3+,Al3+ allowed recommending these materials as good candidates for different applications including LED and X-ray intensifying *** double activated TAG with Ce3+ and Eu3+ and for different mole ratios of Ce/Eu,the color temperature changed from 5500 K(0.331,0.322) up to 4200 K(0.370,0.381) and the light became 'warmer'.Application of TAG:Ce,Eu in the light emitting device showed better chromaticity coordinates of luminescence and color rendering index of LEDs.

关键词： optical materials phosphors luminescence rare earths