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spin synthesis of monolayer of siO_2 thin films

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Journal of semiconductors 2015年第4期36卷 16-25页

作者： s.s.shinde s.park J.shin Korea Research Institute of standards and science

The highly ordered monolayer of submicron size silica （siO2） particles （235 nm） is developed on p-silicon by using three-step spin-coating in colloidal suspension, which has significant potential in various applications. The influence of three-step spin speeds, spinning time, acceleration time between different steps, concentration of siO2 particles in the solution, solution quantity, and the ambient humidity （relative humidity） on the properties ofmonolayer siO2 are studied in order to achieve a large area monolayer film. A relatively high surface coverage and uniform monolayer film of siO2 particles in the range of 85%-90% are achieved by appropriate control of the preparative parameters. We conclude that this method can be useful in industrial applications, because of the fabrication speed, surface coverage and cost of the process.

关键词： thin films spin synthesis electron microscopy

Three-Dimensional Isogeometric Analysis of Flexoelectricity with MATLAB Implementation

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Computers, Materials & Continua 2020年第11期65卷 1157-1179页

作者： Hamid Ghasemi Harold s.park Xiaoying Zhuang Timon Rabczuk Department of Mechanical Engineering Arak University of TechnologyArak38181-41167Iran Department of Mechanical Engineering Boston UniversityBostonMA 02215USA Division of Computational Mechanics Ton Duc Thang UniversityHo Chi Minh CityVietnam Faculty of Civil Engineering Ton Duc Thang UniversityHo Chi Minh CityVietnam Department of Computer Engineering College of Computer and Information SciencesKing Saud UniversityRiyadhSaudi Arabia Institute of structural Mechanics Bauhaus-Universität WeimarWeimarD-99423Germany

Flexoelectricity is a general electromechanical phenomenon where the electric polarization exhibits a linear dependency to the gradient of mechanical strain and vice *** truncated pyramid compression test is among the most common setups to estimate the flexoelectric *** present a three-dimensional isogeometric formulation of flexoelectricity with its MATLAB implementation for a truncated pyramid *** educational purposes,this paper presents a precise computational model to illustrate how the localization of strain gradients around pyramidal boundary shapes contributes in generation of electrical *** MATLAB code is supposed to help learners in the Isogeometric Analysis and Finite Elements Methods community to learn how to solve a fully coupled problem,which requires higher order approximations,*** complete MATLAB code which is available as source code distributed under a BsD-style license,is provided in the part of supplementary Materials of the paper.

关键词： Flexoelectricity Isogeometric Analysis(IGA) MATLAB B-spline elements finite elements coupled electromechanical problem

Leakage pressures for gasketless superhydrophobic fluid interconnects for modular lab-on-a-chip systems

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Microsystems & Nanoengineering 2021年第5期7卷 213-226页

作者： Christopher R.Brown Xiaoxiao Zhao Taehyun park Pin-Chuan Chen Byoung Hee You Daniel s.park steven A.soper Alison Baird Michael C.Murphy Center for Bio-Modular Multi-scale systems Louisiana State UniversityBaton RougeLA 70803USA Department of Mechanical&Industrial Engineering Louisiana State UniversityBaton RougeLA 70803USA Department of Mechanical and Industrial Engineering University of TorontoTorontoON M5S 3GBCanada school of Mechanical Engineering Kyungnam UniversityChangwonSouth Korea Department of Engineering Technology Texas State UniversitySan MarcosTX 78666USA Department of Mechanical Engineering The University of KansasLawrenceKS 66045USA Department of Chemistry The University of KansasLawrenceKS 66045USA sUNY Downstate stroke Center University Hospital of BrooklynBrooklynNY 11203USA

Chip-to-chip and world-to-chip fluidic interconnections are paramount to enable the passage of liquids between component chips and to/from microfluidic ***,most interconnect designs add additional physical constraints to chips with each additional interconnect leading to over-constrained microfluidic *** competing constraints provided by multiple interconnects induce strain in the chips,creating indeterminate dead volumes and misalignment between chips that comprise the microfluidic system.A novel,gasketless superhydrophobic fluidic interconnect(GsFI)that uses capillary forces to form a liquid bridge suspended between concentric through-holes and acting as a fluid passage was *** GsFI decouples the alignment between component chips from the interconnect function and the attachment of the meniscus of the liquid bridge to the edges of the holes produces negligible dead *** passive seal was created by patterning parallel superhydrophobic surfaces(water contact angle>150°)around concentric microfluidic ports separated by a *** relative position of the two polymer chips was determined by passive kinematic constraints,three spherical ball bearings seated in v-grooves.A leakage pressure model derived from the Young-Laplace equation was used to estimate the leakage pressure at failure for the liquid ***-molded,Cyclic Olefin Copolymer(COC)chip assemblies with assembly gaps from 3 to 240μm were used to experimentally validate the *** maximum leakage pressure measured for the GsFI was 21.4 kPa(3.1 psig),which corresponded to a measured mean assembly gap of 3μm,and decreased to 0.5 kPa(0.073 psig)at a mean assembly gap of 240μ*** effect of radial misalignment on the efficacy of the gasketless seals was tested and no significant effect was *** may be a function of how the liquid bridges are formed during the priming of the chip,but additional research is required to test that hypothesis.

关键词： passive interconnection fluid

Cambrian stem-group Cnidarians with a New species from the Cambrian series 3 of the Taebaeksan Basin, Korea

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Acta Geologica sinica(English Edition) 2016年第3期90卷 827-837页

作者： Tae-Yoon s.park Ji-Hoon KIHM Jusun WOO Yong-Yi ZHEN Michael ENGELBRETsEN Jongsun HONG suk-Joo CHOH Dong-Jin LEE Division of Polar-Earth system sciences Korea Polar Research Institute Geological survey of New south Wales W.B.Clarke Geoscience Centre Research Affiliate Biological Sciences Macquarie University Department of Earth and Environmental sciences Korea University Department of Earth and Environmental sciences Andong National University

Five species, Lipopora lissa Jell and Jell, 1976, Lipopora daseia Jell and Jell, 1976, Tretocylichne perplexa Engeibretsen, 1993 from Australia, Cambroctoconus orientalis.park, Woo, Lee, Lee, Lee, Han and Chough, 2011 from China, and Cambroctoconus kyrgyzstanicus Peel, 2014 from Kyrgyzstan, belonging to the Cambrian stem-group cnidarians have been documented in the fossil record. Cambroctoconus coreaensis sp. nov., interpreted here as a stem-group cnidarian, from the seokgaejae section in the Daegi Formation, Taebaek Group （Cambrian series 3）, Taebaeksan Basin, central-eastern Korean Peninsula, has a slender cup-shaped skeleton. A cladistic analysis produced 21 most parsimonious trees, which invariably placed the six stem-group cnidarians below the crown-group, but their relationships within the stem-group are unresolved. Nine out of the 21 trees suggest a monophyletic relationship for the Cambrian stem-group cnidarians, whereas in six other trees a monophyly of Cambroctoconus and Tretocylichne appeared as the sister-group to the crown-group cnidarians with Lipopora at the most basal branch. This result may reflect the fact that crown-group cnidarians evolved in the Precambrian, and suggests that the diversity of stem-group cnidarians was a result of an independent radiation in the Cambrian.

关键词： Phylogeny Cnidaria Cambrian Drumian Taebaeksan Basin Korea

The chromosome-level quality genome provides insights into the evolution of the biosynthesis genes for aroma compounds of Osmanthus fragrans

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Horticulture Research 2018年第1期5卷 102-114页

作者： Xiulian Yang Yuanzheng Yue Haiyan Li Wenjie Ding Gongwei Chen Tingting shi Junhao Chen Min s.park Fei Chen Lianggui Wang Co-Innovation Center for sustainable Forestry in southern China Nanjing Forestry UniversityNanjingChina College of Landscape Architecture Nanjing Forestry UniversityNanjingChina state Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops Fujian Agriculture and Forestry UniversityFuzhouChina Nextomics Bioscience Institute WuhanChina

sweet osmanthus(Osmanthus fragrans)is a very popular ornamental tree species throughout southeast Asia and UsA particularly for its extremely fragrant *** constructed a chromosome-level reference genome of *** to assist in studies of the evolution,genetic diversity,and molecular mechanism of aroma development.A total of over 118 Gb of polished reads was produced from Hiseq(45.1 Gb)and PacBio sequel(73.35 Gb),giving 100×depth coverage for long *** combination of Illumina-short reads,PacBio-long reads,and Hi-C data produced the final chromosome quality genome of *** with a genome size of 727 Mb and a heterozygosity of 1.45%.The genome was annotated using de novo and homology comparison and further refined with transcriptome *** genome of *** was predicted to have 45,542 genes,of which 95.68%were functionally *** annotation found 49.35%as the repetitive sequences,with long terminal repeats(LTR)being the richest(28.94%).Genome evolution analysis indicated the evidence of whole-genome duplication 15 million years ago,which contributed to the current content of 45,242 *** analysis revealed that linalool,a monoterpene is the main aroma *** on the genome and transcriptome,we further demonstrated the direct connection between terpene synthases(TPss)and the rich aromatic molecules in *** identified three new flower-specific TPs genes,of which the expression coincided with the production of *** results suggest that the high number of TPs genes and the flower tissue-and stage-specific TPs genes expressions might drive the strong unique aroma production of ***.

关键词： evolution insight aroma

Fabrication of TiN/cBN and TiC/diamond coated particles by titanium deposition process

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Transactions of Nonferrous Metals society of China 2014年第11期24卷 3562-3570页

作者： Walid M.DAOUsH Hee s.park soon H.HONG Department of Production Technology Faculty of Industrial Education Helwan UniversityCairo 11511-11668 Egypt Institute of Industrial Technology ILJIN Diamond Co. Ltd. Chungcheongbuk 369-824 Korea Department of Materials science and Engineering Korea Advanced Institute of Science and TechnologyDaejon 305-701 Korea

Cubic boron nitride particles coated by titanium nitride (TiN/cBN) as well as diamond particles coated by titanium carbide (TiC/diamond) were prepared by Ti molten salt deposition followed by heat-treatment process. cBN or diamond particles were mixed separately with Ti powders and molten salts (KCl, NaCl and Ksub>2sub>TiFsub>6sub>). The mixture was heated at 900 °C under argon atmosphere. The produced particles were heat-treated under hydrogen at 1000 °C. The morphologies and chemical compositions of the produced particles were investigated by scanning electron microscopy (sEM), X-ray diffraction (XRD) and focused ion beam (FIB). The results show that the cBN and the diamond particles are coated by nano-sized Ti layers. By heat-treatment of the Ti/cBN and TiC/diamond coated particles under hydrogen atmosphere, the deposited Ti layers were interacted by the in-situ transformation reaction with the surfaces of cBN and diamond particles and converted to titanium compounds (TiN and TiC), respectively.

关键词： molten salt reaction titanium deposition cubic boron nitride diamond coating TiN TiC

Multiscale computational understanding and growth of 2D materials:a review

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npj Computational Materials 2020年第1期6卷 1484-1501页

作者： Kasra Momeni Yanzhou Ji Yuanxi Wang shiddartha Paul sara Neshani Dundar E.Yilmaz Yun Kyung shin Difan Zhang Jin-Wu Jiang Harold s.park susan sinnott Adri van Duin Vincent Crespi Long-Qing Chen Mechanical Engineering Department Louisiana Tech UniversityRustonLA 71272USA Department of Mechanical Engineering University of AlabamaTuscaloosaALUSA Institute for Micromanufacturing Louisiana Tech UniversityRustonLAUSA Materials Research Institute The Pennsylvania State UniversityUniversity ParkPA 16802USA Department of Materials science and Engineering The Pennsylvania State UniversityUniversity ParkPA 16802USA 2-Dimensional Crystal Consortium The Pennsylvania State UniversityUniversity ParkPA 16802USA Department of Physics The Pennsylvania State UniversityUniversity ParkPA 16802USA Department of Electrical Engineering Iowa State UniversityAmesIA 50010USA Mechanical Engineering Department The Pennsylvania State UniversityUniversity ParkPA 16802USA shanghai Institute of Applied Mathematics and Mechanics Shanghai Key Laboratory of Mechanics in Energy EngineeringShanghai UniversityShanghai 200072China Department of Mechanical Engineering Boston UniversityBostonMA 02215USA Department of Engineering science and Mechanics The Pennsylvania State UniversityUniversity ParkPA 16802USA Department of Mathematics The Pennsylvania State UniversityUniversity ParkPA 16802USA

The successful discovery and isolation of graphene in 2004,and the subsequent synthesis of layered semiconductors and heterostructures beyond graphene have led to the exploding field of two-dimensional(2D)materials that explore their growth,new atomic-scale physics,and potential device *** review aims to provide an overview of theoretical,computational,and machine learning methods and tools at multiple length and time scales,and discuss how they can be utilized to assist/guide the design and synthesis of 2D materials beyond graphene.

关键词： synthesis utilized subsequent

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鼻部皮肤缺损重建

鼻部皮肤缺损重建

钆塞酸二钠增强MRI评估单发肝细胞癌病人的术后转归：风险评分系统的建立和验证

第二届国际面部整形美容外科学术研讨会

作者： stephen s.park 弗吉尼亚大学头颈外科耳鼻喉部

＜正＞重建性鼻整形术是最古老的鼻成形术之一,可以追溯到社会用切除鼻子作为惩罚的年代。鼻畸形的重建手术在最近的几十年间得到了迅速发展,就修复的形态而言,还是不尽如人意的,但就功能而言, 要好一些。小的畸形（＜1.5cm）更有挑战性...

＜正＞重建性鼻整形术是最古老的鼻成形术之一,可以追溯到社会用切除鼻子作为惩罚的年代。鼻畸形的重建手术在最近的几十年间得到了迅速发展,就修复的形态而言,还是不尽如人意的,但就功能而言, 要好一些。小的畸形（＜1.5cm）更有挑战性,因为病人的期望值较

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来源： cnki会议评论

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国际医学放射学杂志 2023年第4期 490-491页

作者： s.H.park B.Kim s.Kim s.park Y.H.park s.K.shin 周朝阳

摘要目的建立并验证基于钆塞酸二钠增强的肝脏MRI特征和临床因素的风险评分系统，预测单发肝细胞癌（HCC）无复发生存期（RFs）。方法回顾性纳入2个中心接受

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