Search Results - "Jiho Chang"

Gradient-index phononic crystals for omnidirectional acoustic wave focusing and energy harvesting by Hyun, Jaeyub, Park, Choon-Su, Chang, Jiho, Cho, Wan-Ho, Kim, Miso

“…The design, fabrication, and analysis of omnidirectional gradient-index (GRIN) phononic crystals (PnCs) for acoustic wave focusing and energy harvesting have…”
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Achromatic acoustic gradient-index phononic crystal lens for broadband focusing by Hyun, Jaeyub, Cho, Wan-Ho, Park, Choon-Su, Chang, Jiho, Kim, Miso

“…The aim of this study is to realize an achromatic acoustic gradient-index (GRIN) phononic crystal (PC) lens system with a spatially invariant focal length over…”
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Study on the accuracy of Indium-Tin-Oxide (ITO) nanoparticle sensor based on solvent detection characteristics in water by An, Sangsu, Lee, Changhan, Cho, Youngji, Chang, Jiho, Park, Jaejin, Lee, Moonjin

“…We implemented a sensor to measure the concentration of solvents in water and evaluated the accuracy of the sensor. The sensor’s measurement results were…”
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Investigation on the Printed CNT-Film-Based Electrochemical Sensor for Detection of Liquid Chemicals by Noh, Jaeha, An, Sangsu, Lee, Changhan, Chang, Jiho, Lee, Snagtae, Lee, Moonjin, Seo, Dongmin

“…We studied electrochemical sensors using printed carbon nanotubes (CNT) film on a polyethylene telephtalate (PET) substrate. The mechanical stability of the…”
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Performance Improvement of Indium Tin Oxide Electrochemical Sensor by Mixing Carbon Black by Lee, Changhan, An, Sangsu, Cho, Youngji, Chang, Jiho, Park, Jaejin, Lee, Moonjin

“…We studied a method of implementing an electrochemical sensor with high response speed using a film made of metal oxide nanoparticles. The optimal conditions…”
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Machine Learning Approach to find the relation between Endometriosis, benign breast disease, cystitis and non-toxic goiter by Lee, Jung Hun, Kwon, Seon-Young, Chang, Jiho, Yuk, Jin-Sung

“…The exact mechanism of endometriosis is unknown. The recommendation system (RS) based on item similarities of machine learning has never been applied to the…”
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Age-Friendly Ecosystems: Expert Voices from the Field by Fulmer, Terry, Dash, Kim, Shue, Jody, Chang, JiHo, Huang, Jessica, Maglich, Abby

“…(1) Background: With the growth of the age-friendly movement, age-friendly ecosystems (AFE) garnered more attention. The successful development of an AFE is…”
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Chemical sensing properties of indium-tin-oxide (ITO) printed films fabricated on biodegradable plastics by Ko, Dongwan, Choi, Junseck, Seo, Joonyoung, Noh, Jaeha, Lee, Sangtae, Jung, Jung-Yeul, Lee, Moonjin, Chang, Jiho

“…A chemical sensor was fabricated using indium-tin-oxide (ITO) films printed on biodegradable plastic substrates. The ITO layers were printed on polylactic acid…”
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An early report: a modified porphyrin-linked metronidazole targeting intracellular Porphyromonas gingivalis in cultured oral epithelial cells by Ye, Ping, Chang, Jiho, Foo, Lin Feng, Yap, Benjamin C-M

“…Porphyromonas gingivalis (P. gingivalis) has a strong association with the pathogenesis of periodontal disease. Recurrence of periodontal disease following…”
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Fabrication of free-standing GaN by using thermal decomposition of GaN by Kim, Sinae, Lee, Hyunjae, Kim, Siyoung, Choi, Sungkuk, Koo, Jieun, Chang, Jiho

“…Free-standing GaN wafers were fabricated by hydride vapor phase epitaxy (HVPE) using an in-situ self-separation technique. Separation of GaN happened during…”
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Multimodal layer surveillance map based on anomaly detection using multi-agents for smart city security by Shin, Hochul, Na, Ki-In, Chang, Jiho, Uhm, Taeyoung

“…Smart cities are expected to provide residents with convenience via various agents such as CCTV, delivery robots, security robots, and unmanned shuttles…”
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Effects of controlled ambidirectional nucleation on the heteroepitaxial growth of m -GaN on m -sapphire by Lee, Hyun-Jae, Fujii, K., Goto, T., Yao, T., Chang, Jiho

“…We found that m-plane GaN grown on m-plane sapphire nucleates in ambidirections at the initial growth stage, which seriously degrades the surface morphology…”
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Investigation of the annealing effects on the structural and optical properties of sputtered ZnO thin films by Jung, Mina, Lee, Juyoung, Park, Seungwhan, Kim, Hongseung, Chang, Jiho

“…Various effects of annealing on the optical and structural properties of sputtered ZnO layers have been investigated. ZnO layers were sputtered on Si (1 1 1)…”
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Growth of thick GaN layer on ZnAl2O4 spinel layer by HVPE by Yoo, Jinyeop, Choi, Sungkuk, Jung, Soohoon, Cho, Youngji, Lee, Jeungwoo, Lee, Sangtae, Lee, Wonjae, Lee, Hyunjae, Kim, Siyoung, Chang, Jiho

“…Thick GaN film was grown by hydride vapor phase epitaxy (HVPE) on spinel covered ZnO layer. Single crystal ZnO was grown on c-plane sapphire by ultra high…”
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Use of Polytypes to Control Crystallographic Orientation of GaN by Lee, Hyun-Jae, Yao, T, Kim, Chinkyo, Chang, Jiho

“…Many characteristics of epitaxially grown films depend sensitively on their orientations. In most cases, orientation is uniquely determined by that of the…”
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High Performance Printed Ultraviolet-Sensors Based on Indium--Tin-Oxide Nanocrystals by Koo, Jieun, Park, Seunghwan, Lee, Woong, Cho, Youngji, Lee, Hyojong, Lee, Sangtae, Chang, Jiho

“…A UV sensor was fabricated by screen printing indium--tin-oxide (ITO) nanocrystals on to quart glass. The initial printed ITO layer showed a resistivity too…”
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Deep learning-based method for multiple sound source localization with high resolution and accuracy by Lee, Soo Young, Chang, Jiho, Lee, Seungchul

“…•We propose spatial maps that can show sources’ position and strength information.•We suggest a deep neural network to predict source distribution maps…”
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A FPGA based real-time post-processing architecture for active stereo vision by Seung-min Choi, Jiho Chang, Dae Hwan Hwang

“…This paper presents a post-processing architecture for high quality depth map in active stereo vision. The proposed architecture consists of five sub-blocks in…”
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A mixed-order ambisonic scheme to improve performance for sound sources on the horizontal plane by Chang, Jiho

“…This paper proposes a mixed-order ambisonic scheme called #P#L that improves performance in terms of estimation of the coefficient of spherical harmonics…”
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Sound Radiation Control for Uniform Directionality in the Presence of Strong Early Reflections by Chang, Jiho

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