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现代风格,传统魂魄:村野藤吾和他的文化建筑

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艺术与设计 2024年第5期 108-111页

作者：黄巍锋无不详八岳美术馆

即使在逝世40周年后的今天,建筑师村野藤吾(Togo Murano)在日本建筑界的地位仍然与普利兹克奖(Pritzker Prize)得主丹下健三(Kenzo Tange)齐名。为了纪念这位建筑大师,近日在由他设计的八岳美术馆(Yatsugatake Museumof Art)举办了一场... 详细信息

即使在逝世40周年后的今天,建筑师村野藤吾(Togo Murano)在日本建筑界的地位仍然与普利兹克奖(Pritzker Prize)得主丹下健三(Kenzo Tange)齐名。为了纪念这位建筑大师,近日在由他设计的八岳美术馆(Yatsugatake Museumof Art)举办了一场特别的展览。

关键词：现代风格建筑大师丹下健三美术馆

炽热土地,热情营造西非和南亚的热带现代主义建筑

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艺术与设计 2024年第2期 116-119页

作者：黄巍锋无不详维多利亚与阿尔伯特博物馆

近年国际建筑界越来越多地将目光投向非洲、南亚等热带地区。两位普利兹克奖得主、印度现代主义建筑先驱巴克里希纳·多西(Balkrishna Doshi)和布基纳法索裔建筑师弗朗西斯·凯雷(Francis Kéré),也以他们的建筑贡献获得了行业赞誉。

关键词：现代主义建筑普利兹克奖国际建筑界建筑师热带地区南亚

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L~p Boundedness of Fourier Integral Operators in the Class S0,0

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Acta Mathematica Sinica,English Series 2022年第9期38卷 1551-1596页

作者： Ing-Lung hwang Department of Mathematics “National Chung Cheng University of Taiwan”

We first prove the L~2-boundedness of a Fourier integral operator where it’s symbol a ∈S~0(R~n× R~n) and the phase function S is non-degenerate, satisfies certain conditions and may not be positively homogeneous in ξ-variables. Then we use the above property, Paley’s inequality, covering lemma of Calderon and Zygmund etc., and obtain the L~p-boundedness of Fourier integral operators if(1) the symbol a ∈ Λand Supp a = E×R~n, with E a compact set of R~n(m=-|1/p-1/2|n, 1n/2; 2n/p),(2) the symbol a ∈ Λ(m=-|1/p-1/2|n, 1n/2, k’>n/p; 2n/p, k’>n/2) with the phase function S(x, ξ) = xξ + h(x, ξ), x, ξ ∈ R~n non-degenerate,satisfying certain conditions and ?ξ h ∈ S~0(R~n× R~n), or(3) the symbol a ∈ Λ, the requirements for m, k, k’ are the same as in(2), and ?h is not in S~0(R~n× R~n) but the phase function S is non-degenerate, satisfies certain conditions and is positively homogeneous in ξ-variables.

关键词： Fourier integral operator L p -boundedness 35S30

Effects of heavy rainfall on the composition of airborne bacterial communities

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Frontiers of Environmental Science & Engineering 2018年第2期12卷 117-126页

作者： Gwang Il Jang Chung yeon hwang Byung Cheol Cho Microbial Oceanography Laboratory School of Earth and Environmental Sciences and Research Institute of Oceanography Seoul National University Seoul 08826 Republic of Korea Division of Polar Life Sciences Korea Polar Research Institute Incheon 21990 Republic of Korea

Wet deposition scavenges particles and particle-associated bacteria from the air column, but the impact of raindrops on various surfaces on Earth causes emission of surface-associated bacteria into the air column. Thus, after rainfall, these two mechanisms are expected to cause changes in airborne bacterial community composition （BCC）. In this study, aerosol samples were collected at a suburban site in Seoul, Korea before and after three heavy rainfall events in April, May, and July 2011. BCC was investigated by pyrosequencing the 16S rRNA gene in aerosol samples. Interestingly, the relative abundance of non-spore forming Actinobacteria operational taxonomic units （OTUs） was always higher in post-rain aerosol samples. In particular, the absolute and relative abundances of airborne Propionibacteriaceae always increased after rainfall, whereas those of airborne Firmicutes, including Carnobacteriaceae and Clostridiales, consistently decreased. Marine bacterial sequences, which were temporally important in aerosol samples, also decreased after rainfall events. Further, increases in pathogen-like sequences were often observed in post-rain air samples. Rainfall events seemed to affect airborne BCCs by the combined action of the two mechanisms, with potentially adverse effects on human and plant health.

关键词： Aerosol BacteriaCommunity composition PyrosequencingRain

Boost Up the Mechanical and Electrical Property of CNT Fibers by Governing Lyotropic Liquid Crystalline Mesophases with Aramid Polymers for Robust Lightweight Wiring Applications

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Advanced Fiber Materials 2023年第2期5卷 514-526页

作者： Ki‑Hyun Ryu Jeong‑Gil Kim Dongju Lee Seo Gyun Kim Bon‑Cheol Ku Jun yeon hwang Kwang‑Un Jeong Nam Dong Kim Dae‑Yoon Kim Functional Composite Materials Research Center Korea Institute of Science and TechnologyWanju 55324Republic of Korea Carbon Composite Materials Research Center Korea Institute of Science and TechnologyWanju 55324Republic of Korea Department of Polymer‑Nano Science and Technology Department of Nano Convergence EngineeringJeonbuk National UniversityJeonju 54896Republic of Korea Department of Chemical and Biomolecular Engineering Korea Advanced Institute of Science and TechnologyDaejeon 34141Republic of Korea

Monofilament type of polyaromatic amide(PA)and carbon nanotube(CNT)composite fibers is presented.A concept of a lyotropic liquid crystal(LLC)constructed via a spontaneous self-assembly is introduced to mitigate the extremely low com-patibility between PA and *** approaches provide an effective co-processing route of PA and CNT simultaneously to fabricate the uniform,continuous,and reliable composite fibers through a ***,the addition of a small amount PA into the dope solution of CNT governs the LLC mesophase not only in a spinneret stage but also in a coagulant ***,the developed PA/CNT composite fibers have the high uniaxial orientational order and the close interfacial packing compared to the pure CNT *** PA/CNT composite fibers achieve the outstanding tensile strength,electrical conductivity,and electrochemical response,while maintaining a *** also exhibit the chemical,mechanical,and thermal *** of these advantages can make flexible,sewable,and washable PA/CNT composite fibers ideal nanocomposite materials for use in next-generation information and energy transporting system by replacing conventional metal electrical conductors.

关键词： Carbon nanotube Aramid polymer Liquid crystal Composite fiber Electrical wire

Mechanical properties of graphene oxide?silk fibroin bionanofilms via nanoindentation experiments and finite element analysis

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Friction 2022年第2期10卷 282-295页

作者： Hyeonho CHO Joonho LEE Hyundo hwang Woonbong hwang Jin-Gyun KIM Sunghan KIM School of Mechanical Engineering Chung-Ang UniversitySeoul 06974Republic of Korea Department of Mechanical Engineering(Integrated Engineering) Kyung Hee UniversityGyeonggi 17104Republic of Korea Department of Mechanical Engineering POSTECHPohang 37673Republic of Korea Department of Robotics&Mechatronics.Korea Institute of Machinery&Materials Daejeon 34103Republic of Korea

Understanding the mechanical properties of bionanofilms is important in terms of identifying their *** primary focus of this study is to examine the effect of water vapor annealed silk fibroin on the indentation modulus and hardness of graphene oxide-silk fibroin(GO-SF)bionanofilms through nanoindentation experiments and finite element analysis(FEA).The GO-SF bionanofilms were fabricated using the layer-by-layer *** water vapor annealing process was employed to enhance the interfacial properties between the GO and SF layers,and the mechanical properties of the GO-SF bionanofilms were found to be affected by this *** employing water vapor annealing,the indentation modulus and hardness of the GO-SF bionanofilms can be ***,the FEA models of the GO-SF bionanofilms were developed to simulate the details of the mechanical behaviors of the GO-SF *** difference in the stress and strain distribution inside the GO-SF bionanofilms before and after annealing was *** addition,the load-displacement curves that were obtained by the developed FEA model conformed well with the results from the nanoindentation *** summary,this study presents the mechanism of improving the indentation modulus and hardness of the GO-SF bionanofilms through the water vapor annealing process,which is established with the FEA simulation models.

关键词： graphene oxide silk fibroin layer-by-layer(LbL) nanoindentation finite element analysis(FEA)

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Lp Boundedness of Fourier Integral Operators in the Class S1,0

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Acta Mathematica Sinica,English Series 2023年第1期39卷 37-98页

作者： Ing-Lung hwang Department of Mathematics “National Chung Cheng University of Taiwan”

We prove the following properties:(1) Let a ∈ Λ1,0,k,k’m0(Rn×Rn) with m0=-1|1/p-1/2|(n-1),n≥2(1 n/p,k’> 0;2≤p≤∞,k>n/2,k’>0 respectively).Suppose the phase function S is positively homogeneous in ξ-variables,non-degenerate and satisfies certain *** the Fourier integral operator T is *** the method of(1),we can obtain the Lp-boundedness of the Fourier integral operator if(2) the symbol a ∈ Λ1,δ,k,k’m0, 0≤δ≤1,with m0,k,k’ and S given as in(1).Also,the method of(1) gives:(3) a ∈ Λ1,δ,k,k’0,0≤δ<1 and k,k’given as in(1),then the Lp-boundedness of the pseudo-differential operators holds,1

关键词： Fourier integral operator L p -boundedness 35S30

A Method for Detecting Non-Mask Wearers Based on Regression Analysis

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Computers, Materials & Continua 2022年第9期72卷 4411-4431页

作者： Dokyung hwang Hyeonmin Ro Naejoung Kwak Jinsang hwang Dongju Kim POSTECH Institute of Artificial Intelligence Pohang24257Korea Department of Information Security at Pai Chai University Daejeon35345Korea Department of Safety and Emergency Management at kyungwoon University Gumi39160Korea

A novel practical and universal method of mask-wearing detection has been proposed to prevent viral respiratory *** proposed method quickly and accurately detects mask and facial regions using welltrained You Only Look Once(YOLO)detector,then applies image coordinates of the detected bounding box(bbox).First,the data that is used to train our model is collected under various circumstances such as light disturbances,distances,time variations,and different climate *** also contains various mask types to detect in general and universal application of the *** detect mask-wearing status,it is important to detect facial and mask region accurately and we created our own dataset by taking picture of ***,the Convolutional Neural Network(CNN)model is trained with both our own dataset and open dataset to detect under heavy foot-traffic(Indoors).To make the model robust and reliable in various environment and situations,we collected various sample data in different *** through the experiment,we found out that there is a particular gradient according to the mask-wearing *** proposed method searches the point where the distance between the gradient for each state and the coordinate information of the detected object is the *** it carry out the classification of mask-wearing status of detected ***,we defined and classified three different mask-wearing states according to the mask’s position(With mask,Wear a mask around chin and Without mask).The gradient according to the mask-wearing status,is analyzed through linear *** regression interpretation is based on coordinate information of mask-wearing status and the sample data collected in simulated environment that considering distances between objects and the camera in the World Coordinate *** the experiments,we found out that linear regression analysis is more suitable than logistic regression analysis for classification of people wea

关键词： Automatic quarantine process detection of improper mask wearers facial image coordinates convolution neural network

Experimental Investigation of Aerodynamic Performance due to Blade Tip Clearance in a Gas Turbine Rotor Cascade

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Journal of Thermal Science 2022年第1期31卷 173-178页

作者： CHUNG Jinmoo BAEK Seungchan hwang Wontae Department of Mechanical Engineering Seoul National UniversitySeoul 08826Republic of Korea Institute of Advanced Machines and Design Seoul National UniversitySeoul 08826Republic of Korea Institute of Engineering Research Seoul National UniversitySeoul 08826Republic of Korea

This study examines how the complex flow structure within a gas turbine rotor affects aerodynamic loss. An unshrouded linear turbine cascade was built, and velocity and pressure fields were measured using a 5-hole probe. In order to elucidate the effect of tip clearance, the overall aerodynamic loss was evaluated by varying the tip clearance and examining the total pressure field for each case. The tip clearance was varied from 0% to 4.2% of blade span and the chord length based Reynolds number was fixed at 2×10^(5). For the case without tip clearance, a wake downstream of the blade trailing edge is observed, along with hub and tip passage vortices. These flow structures result in profile loss at the center of the blade span, and passage vortex related losses towards the hub and tip. As the tip clearance increases, a tip leakage vortex is formed, and it becomes stronger and eventually alters the tip passage vortex. Because of the interference of the secondary tip leakage flow with the main flow, the streamwise velocity decreases while the total pressure loss increases significantly by tenfold in the last 30% blade span region towards the tip for the 4.2% tip clearance case. It was additionally observed that the overall aerodynamic loss increases linearly with tip clearance.

关键词： gas turbine turbine cascade aerodynamic loss tip clearance tip leakage

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