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Detection of Graphene Cracks By Electromagnetic Induction,Insensitive to Doping Level

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Computer Modeling in Engineering & Sciences 2019年第8期120卷 351-361页

作者： Taeshik Yoon Sumin Kang Tae Yeob Kang taek-soo kim Department of Mechanical Engineering KAISTDaejeon 34141Korea Graphene Research Center KAISTDaejeon 34141Korea

Detection of cracks is a great concern in production and operation processes of graphene based devices to ensure uniform ***,we show a detection method for graphene cracks by electromagnetic *** time varying magnetic field leads to induced voltage signals on graphene,and the signals are detected by a *** measured level of induced voltage is correlated with the number of cracks in graphene *** correlation is attributed to the increasing inductive characteristic of defective graphene,and it is verified by electromagnetic simulation and radio frequency ***,we demonstrate that the induced voltage signal is insensitive to the doping level of *** work can potentially lead to the development of a high-throughput and reliable crack inspection technique for mass production of graphene applications.

关键词： Graphene,crack detection inductance electromagnetic induction insensitive to doping

Preface: Nano/Micro Structures in Application of Computational Mechanics

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Computer Modeling in Engineering & Sciences 2019年第8期120卷 235-237页

作者： Chang-Chun Lee Nien-Ti Tsou taek-soo kim Department of Power Mechanical Engineering National Tsing Hua UniversityHsinchu 30013Taiwan Department of Material Science and Engineering National Chiao Tung UniversityHsinchu 30013Taiwan Department of Mechanical Engineering KAISTDaejeon 34141Korea

Many important issues of structures,such as lattice mismatch,compatibility,orientation,evolution,phase transition,surfaces,interfaces,defects,and domain engineering,have attracted considerable *** corresponding mechanisms of these issues have not been fully *** mechanics has been widely used to investigate such complexities in nano/microstructures in recent *** this special issue,leading experts in their respective fields are invited to present their new insight into the theoretical calculation and modeling of nano/*** articles are collected.A brief introduction on each article is provided below.

关键词： compatibility insight mechanisms

On-skin and tele-haptic application of mechanically decoupled taxel array on dynamically moving and soft surfaces

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npj Flexible Electronics 2022年第1期6卷 964-972页

作者： Se Young Kwon Gyeongsuk Park Hanbit Jin Changyeon Gu Seung Jin Oh Joo Yong Sim Wooseup Youm taek-soo kim Hye Jin kim Steve Park Department of Materials Science and Engineering Korea Advanced Institute of Science and Technology(KAIST)Daejeon 34141Republic of Korea Electronics and Telecommunications Research Institute(ETRI) Daejeon 34129Republic of Korea Department of Mechanical Engineering Korea Advanced Institute of Science and Technology(KAIST)Daejeon 34141Republic of Korea Department of Mechanical Systems Engineering Sookmyung Women’s UniversityDaejeon 04313Republic of Korea

To accurately probe the tactile information on soft skin,it is critical for the pressure sensing array to be free of noise and inter-taxel crosstalk,irrespective of the measurement ***,on dynamically moving and soft surfaces,which are common conditions for on-skin and robotic applications,obtaining precise measurement without compromising the sensing performance is a significant challenge due to mechanical coupling between the sensors and with the moving *** this work,multi-level architectural design of micro-pyramids and trapezoid-shaped mechanical barrier array was implemented to enable accurate spatiotemporal tactile sensing on soft surfaces under dynamic ***-off relationship between limit of detection and bending insensitivity was discovered,which was overcome by employing micropores in barrier ***,in-situ pressure mapping on dynamically moving soft surfaces without signal distortion is demonstrated while human skin and/or soft robots are performing complicated tasks such as reading Braille and handling the artificial organs.

关键词： artificial moving dynamically

Effects of Flexible Conjugation-Break Spacers of Non-Conjugated Polymer Acceptors on Photovoltaic and Mechanical Properties of All-Polymer Solar Cells

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Nano-Micro Letters 2022年第10期14卷 164-177页

作者： Qiaonan Chen Yung Hee Han Leandro R.Franco Cleber F.N.Marchiori Zewdneh Genene CMoyses Araujo Jin-Woo Lee Tan Ngoc-Lan Phan Jingnan Wu Donghong Yu Dong Jun kim taek-soo kim Lintao Hou Bumjoon J.kim Ergang Wang Siyuan Laboratory Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy MaterialsDepartment of PhysicsJinan UniversityGuangzhou 510632People’s Republic of China Department of Chemistry and Chemical Engineering Chalmers University of TechnologySE-41296GöteborgSweden Department of Chemical and Biomolecular Engineering Korea Advanced Institute of Science and Technology(KAIST)Daejeon 34141Republic of Korea Department of Engineering and Physics Karlstad University65188 KarlstadSweden Department of Chemistry and Bioscience Aalborg University9220 AalborgDenmark Department of Mechanical Engineering Korea Advanced Institute of Science and Technology(KAIST)Daejeon 34141Republic of Korea Materials Theory Division Department of Physics and AstronomyUppsala University75120 UppsalaSweden Sino-Danish Center for Education and Research 8000 AarhusDenmark School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001People’s Republic of China

All-polymer solar cells(all-PSCs)possess attractive merits including superior thermal stability and mechanical flexibility for large-area roll-to-roll *** flexible conjugation-break spacers(FCBSs)into backbones of polymer donor(P_(D))or polymer acceptor(P_(A))has been demonstrated as an efficient approach to enhance both the photovoltaic(PV)and mechanical properties of the ***,length dependency of FCBS on certain all-PSC related properties has not been systematically *** this regard,we report a series of new non-conjugated P_(A)s by incorporating FCBS with various lengths(2,4,and 8 carbon atoms in thioalkyl segments).Unlike com-mon studies on so-called side-chain engineering,where longer side chains would lead to better solubility of those resulting polymers,in this work,we observe that the solubilities and the resulting photovoltaic/mechanical properties are optimized by a proper FCBS length(i.e.,C2)in P_(A) named *** all-PSC achieves a high efficiency of 11.37%,and excellent mechanical robustness with a crack onset strain of 12.39%,significantly superior to those of the other P_(A)*** results firstly demonstrate the effects of FCBS lengths on the PV performance and mechanical properties of the all-PSCs,providing an effective strategy to fine-tune the structures of P_(A)s for highly efficient and mechanically robust PSCs.

关键词： All-polymer solar cells Flexible conjugation-break spacers Mechanical robustness Polymer acceptors Stretchability

Multi-directionally wrinkle-able textile OLEDs for clothing-type displays

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npj Flexible Electronics 2020年第1期4卷 288-296页

作者： Seungyeop Choi Woosung Jo Yongmin Jeon Seonil Kwon Jeong Hyun Kwon Young Hyun Son Junmo kim Jun Hong Park Hyuncheol kim Ho Seung Lee Minwoo Nam Eun Gyo Jeong Jeong Bin Shin taek-soo kim Kyung Cheol Choi School of Electrical Engineering Korea Advanced Institute of Science and Technology(KAIST)Daejeon 34141Republic of Korea Department of Mechanical Engineering Korea Advanced Institute of Science and Technology(KAIST)Daejeon 34141Republic of Korea

A clothing-type wearable display can be utilized in fashion,bio-healthcare,and safety industries as well as smart textiles for the internet of things(IoTs)and wearable *** response to this trend,we demonstrate a textile display that can endure the active movements of a human *** can be applied to any kind of textile,and is durable against conditions such as rain,sweat,and *** a key technology for realizing the multi-directional wrinkle-able textile display,we fabricated a stress-lowering textile platform with an ultrathin planarization layer replicated from the flat surface of *** elastomeric strain buffer for reducing mechanical stress is also inserted into the textile ***,organic light-emitting diodes(OLEDs)with red,green and blue color,thin film transistors(TFTs)fabricated at a low temperature below 150℃,and a washable encapsulation layer blocking both gas and liquid were demonstrated on the textile platform.

关键词： OLEDs IoT directional

A New Encryption Mechanism Supporting the Update of Encrypted Data for Secure and Efficient Collaboration in the Cloud Environment

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Computer Modeling in Engineering & Sciences 2025年第1期142卷 813-834页

作者： Chanhyeong Cho Byeori kim Haehyun Cho taek-Young Youn Department of Cyber Security Dankook UniversityYongin16890Republic of Korea Department of Software Soongsil UniversitySeoul07027Republic of Korea

With the rise of remote collaboration,the demand for advanced storage and collaboration tools has rapidly ***,traditional collaboration tools primarily rely on access control,leaving data stored on cloud servers vulnerable due to insufficient *** paper introduces a novel mechanism that encrypts data in‘bundle’units,designed to meet the dual requirements of efficiency and security for frequently updated collaborative *** bundle includes updated information,allowing only the updated portions to be reencrypted when changes *** encryption method proposed in this paper addresses the inefficiencies of traditional encryption modes,such as Cipher Block Chaining(CBC)and Counter(CTR),which require decrypting and re-encrypting the entire dataset whenever updates *** proposed method leverages update-specific information embedded within data bundles and metadata that maps the relationship between these bundles and the plaintext *** utilizing this information,the method accurately identifies the modified portions and applies algorithms to selectively re-encrypt only those *** approach significantly enhances the efficiency of data updates while maintaining high performance,particularly in large-scale data *** validate this approach,we conducted experiments measuring execution time as both the size of the modified data and the total dataset size *** show that the proposed method significantly outperforms CBC and CTR modes in execution speed,with greater performance gains as data size ***,our security evaluation confirms that this method provides robust protection against both passive and active attacks.

关键词： Cloud collaboration mode of operation data update efficiency

Apolipoprotein A-I binding protein-mediated neuroprotection in glaucomatous neuroinflammation and neurodegeneration

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Neural Regeneration Research 2025年第5期20卷 1414-1415页

作者： Sinwoo Hwang Seunghwan Choi soo-Ho Choi Keun-Young kim Yury I.Miller Won-Kyu Ju Hamilton Glaucoma Center and Shiley Eye Institute The Viterbi Family Department of OphthalmologyUniversity of California San DiegoLa JollaCAUSA Department of Medicine University of California San DiegoLa JollaCAUSA National Center for Microscopy and Imaging Research Department of NeurosciencesUniversity of California San DiegoLa JollaCAUSA

Glaucoma is a multifactorial eye disorder that can cause vision loss and irreversible blindness,affecting individ uals aged 40 to 80 yea rs *** to the aging population,it is expected that the number of people affected by glaucoma will surpass 111 million by 2040 as the disease becomes more *** primarily contributes to optic nerve axon loss and the progressive degeneration of retinal ganglion cells (RGCs),subsequently leading to vision impairment.

关键词： irreversible pass primarily

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World Journal of Clinical Cases 2021年第24期9卷 7205-7211页

作者： So-My Koo Ki-Up kim Yang-Ki kim soo-taek Uh Department of Internal Medicine Soonchunhyang University Seoul HospitalSeoul 04401South Korea

BACKGROUND Epidermal growth factor receptor tyrosine kinase inhibitors(EGFR-TKIs)are tolerable drugs used for patients with EGFR-mutant advanced non-small cell lung cancer(NSCLC).Serious adverse reactions are uncommon compared with cytotoxic *** SUMMARY A 52-year-old man presented with general weakness and *** had been taking erlotinib for 11 mo to treat *** pathological diagnosis from the right upper lobe mass was adenocarcinoma with an EGFR mutation in exon 21(L858R).He had previously received paclitaxel/carboplatin,gemcitabin/vinorelbine chemotherapy,stereotactic radiosurgery for brain metastasis,and whole-brain radiotherapy as treatment for *** diagnosed the patient with acute myeloid leukemia(AML).During the induction and consolidation chemotherapy for AML,the erlotinib was *** complete remission of the AML was achieved,since the lung masses were increased,pemetrexed/cisplatin for the NSCLC was *** two cycles of chemotherapy,the cytopenia was *** relapse occurred with the same *** Therapy-related acute myeloid neoplasm(t-MN)is a rare but fatal late *** a patient may be taking EGFR-TKIs,the possibility of t-MN should be *** studies are needed to determine whether EGFR-TKI usage is a predisposing factor for t-MN.

关键词： Acute myeloid leukemia Erlotinib Neoplasm,second primary Non-small cell lung cancer Case report

Effects of planting distance and depth on PTO load spectrum of a small riding-type transplanter

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International Journal of Agricultural and Biological Engineering 2020年第2期13卷 57-63页

作者： Wan-soo kim Yeon-soo kim taek-Jin kim Kyu-Chul Nam Tae-Bum kim Tae-Ho Han Ryu-Gap Im Yong-Hyeon kim Yong-Joo kim Department of Biosystems Machinery Engineering Chungnam National UniversityDaejeon 34134Republic of Korea Department of Smart Agriculture Systems Chungnam National UniversityDaejeon 34134Republic of Korea Convergence Agricultural Machinery Group Korea Institute of Industrial TechnologyGimje 54325Republic of Korea Certification WarrantyInspection and Standardization TeamKorea Agricultural Machinery Industry CooperativeCheonan 31041Republic of Korea Diesel Service Korea Co.Ltd. Daejeon 34357Republic of Korea Agricultural Machinery Certification Team Foundation of Agricultural Technology Commercialization and TransferIksan 54667Republic of Korea Gint Co.Ltd. Suwon 16225Republic of Korea

The aim of this study was to analyze the effects of the planting distance and depth on the power take-off(PTO)load spectrum of a small riding-type transplanter for the optimal design of the *** measure load data during actual planting operation,a load measurement system was developed using a torque sensor,a data acquisition system,and an *** experiments were conducted at four planting distances(26 cm,35 cm,43 cm,and 80 cm)and three planting depths(85 mm,105 mm,and 136 mm)in a field with similar soil *** measured load data were inverted into a load spectrum using rain-flow counting and Smith-Watson-Topper(SWT)*** safety factor of a transplanter according to the planting conditions was analyzed using the converted load spectrum and commercial *** load spectrum for all planting conditions showed torque ratios similar within a high cycle region of 108 to *** torque ratio increased when the planting depth increased and planting distance decreased in the low cycle region under less than 108 *** safety factors of the PTO driving gear and the driven gear increased as the planting distance increased at all planting *** the planting depth decreased at the same planting distance,the safety factor of the PTO gears *** results of this study might provide useful information for a transplanter PTO design considering the working load according to the various planting conditions.

关键词： transplanter planting distance planting depth power take-off load spectrum safety factor