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A study on hydrogen uptake and release of a eutectic mixture of biphenyl and diphenyl ether

Journal of Energy Chemistry 2020年第3期29卷 11-16页

作者： Munjeong Jang byeong soo shin Young Suk Jo Jeong Won Kang Sang Kyu Kwak Chang Won Yoon Hyangsoo Jeong Center for Hydrogen Fuel Cell Research Korea Institute of Science and Technology(KIST)5 Hwarang-ro 14-gilSeongbuk-guSeoul 02792Republic of Korea Divison of Energy and Environment Technology KIST SchoolKorea University of Science and Technology5 Hwarang-ro 14-gilSeongbuk-guSeoul 02792Republic of Korea Department of Chemical and Biological Engineering Korea UniversityAnam-ro 145Seongbuk-guSeoul 02841Republic of Korea School of Energy and Chemical Engineering Ulsan National Institute of Science and Technology50UNIST-gilUlsan 44919Republic of Korea KHU-KIST Department of Converging Science and Technology Kyung Hee University26 Kyungheedae-roDongdaemun-guSeoul 02447Republic of Korea

Hydrogen storage in Liquid Organic Hydrogen Carrier(LOHC)systems is appealing for the safe storage and distribution of excess renewable energy via existing gasoline infrastructures to *** present the eutectic mixture of biphenyl and diphenyl ether of its first use as a LOHC *** material is hydrogenated with 99%selectivity without the cleavage of C–O bond,with commercial heterogeneous catalysts,which is confirmed by nuclear magnetic spectroscopy and gas chromatography-mass *** concentration,dehydrogenation enthalpy,and thermo-neutral temperature are calculated using a density functional *** results indicate that O-atom-containing material exhibits more favorable dehydrogenation thermodynamics than that of the hydrocarbon *** H2-rich material contains6.8 wt%of gravimetric hydrogen storage capacity.A preliminary study of catalytic dehydrogenation on a continuous reactor is presented to demonstrate a reversibility of this material.

关键词： Hydrogen storage Liquid organic hydrogen carrier Diphenyl ether Dehydrogenation Thermodynamics

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Parameter estimation for building energy models using GRcGAN

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Building Simulation 2023年第4期16卷 629-639页

作者： Hansol shin Cheol-soo Park Department of Architecture and Architectural Engineering College of EngineeringSeoul National UniversitySeoul08826R.O.Korea Institute of Construction and Environmental Engineering Institute of Engineering ResearchCollege of EngineeringSeoul National UniversitySeoul08826R.O.Korea

Parameter estimation methods can be classified into(1)manual(trial-and-error),(2)numerical optimization(optimization,sampling),(3)Bayesian inference(Bayes filter,Bayesian calibration),and(4)machine learning(generative model).Bayesian calibration has been widely used because it can capture stochastic nature of uncertain ***,the results of Bayesian calibration could be biased by(1)the prior distribution assumed by the expert’s subjective judgment;(2)the likelihood function that cannot always describe the true likelihood;and(3)the posterior distribution approximation method,such as the Markov Chain Monte Carlo,which requires significant computation *** overcome this,a new approach using a generator-regularized continuous conditional generative adversarial network(GRcGAN)is presented in this *** target parameters of the DOE reference building model were *** was trained to estimate uncertain parameters using simulated monthly electricity and gas *** can successfully estimate five uncertain parameters based on 1,000 training data *** proposed approach presents a potential for stochastic parameter estimation.

关键词： generative adversarial networks generative model parameter estimation inverse problem model calibration parameter uncertainty

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Journal of Central South University 2013年第9期20卷 2440-2446页

作者： LEE Sang-hyuk shin Seung-soo Department of Electrical and Electronic Engineering Xi'an Jiaotong-Liverpool University Department of Information Security Tongmyong University

Similarity measure design on non-overlapped data was carried out and compared with the case of overlapped *** feature of similarity on overlapped data to non-overlapped data was provided by *** the artificial data illustration,it was proved that the conventional similarity measure was not proper to calculate the similarity measure of the non-overlapped *** overcome the unbalance problem,similarity measure on non-overlapped data was obtained by considering neighbor ***,different approaches to design similarity measure were proposed and proved by consideration of neighbor *** the example of artificial data,similarity measure calculation was carried *** measure extension to intuitionistic fuzzy sets(IFSs)containing uncertainty named hesitance was also followed.

关键词： similarity measure overlapped data non-overlapped data intuitionistic data

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User Interface-Based Repeated Sequence Detection Method for Authentication

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Intelligent Automation & Soft Computing 2023年第3期35卷 2573-2588页

作者： shin Jin Kang soo Kyun Kim School of Games Hongik UniversitySejong30016Korea Department of Computer Engineering Jeju National UniversityJeju63243Korea

In this paper,we propose an authentication method that use mouse and keystroke dynamics to enhance online privacy and *** proposed method identiﬁes personalized repeated user interface(UI)sequences by analyzing mouse and keyboard *** this end,an Apriori algorithm based on the keystroke-level model(KLM)of the human–computer interface domain was *** proposed system can detect repeated UI sequences based on KLM for authentication in the *** effectiveness of the proposed method is veriﬁed through access test-ing using commercial applications that require intensive UI *** results show using our cognitive mouse-and-keystroke dynamics system can com-plement authentication at the application level.

关键词： Authentication keystroke-level model(KLM) keystroke mouse dynamics

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Image Translation Method for Game Character Sprite Drawing

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Computer Modeling in Engineering & Sciences 2022年第5期131卷 747-762页

作者： Jong-In Choi soo-Kyun Kim shin-Jin Kang Department of Digital Media Seoul Women’s UniversitySeoul01797Korea Computer Engineering Jeju National UniversityJeju63243Korea School of Games Hongik UniversitySejong30016Korea

Two-dimensional(2D)character animation is one of the most important visual elements on which users’interest is focused in the game ***,2D character animation works in the game field are mostly performed manually in two dimensions,thus generating high production *** study proposes a generative adversarial network based production tool that can easily and quickly generate the sprite images of 2D ***,we proposed a methodology to create a synthetic dataset for training using images from the real world in the game resource production field where machine learning datasets are *** addition,we have enabled effective sprite generation while minimizing user input in the process of using the *** this end,we proposed a mixed input method with a small number of segmentations and skeletal bone *** proposed image-to-image translation network effectively generated sprite images from the user input images using the skeletal *** conducted an experiment regarding the number of images required and showed that 2D sprite resources can be generated even with a small number of segmentation inputs and one skeletal bone drawing.

关键词： Sprite generation body segmentation pose estimation generative adversarial network deep learning

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Clinical importance and surgical decision-making regarding proximal resection margin for gastric cancer

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World Journal of Gastrointestinal Oncology 2013年第1期5卷 4-11页

作者： Doosup shin Sung-soo Park Department of Surgery Korea University College of Medicine Division of Upper GI Surgery Department of SurgeryKorea University College of MedicineMIS and Robotic Surgery Center Korea University Medical Center Korea University Anam Hospital

Because of the intramural spread of gastric cancer,a sufficient length of a resection margin has to be attained to ensure complete excision of the *** has been debate on an adequate length of proximal resection margin(PRM) and its related ***,the objective of this article is to review several studies on PRM and to summarize the current evidence on the *** there is some discrepancy in the recommended values for PRM between authors,a PRM of more than 2-3 cm for early gastric cancer and 5-6 cm for advanced gastric cancer is thought to be *** the margin is confirmed to be clear,however,the length of PRM measured in postoperative pathologic examination does not affect the patient's survival,even when it is shorter than the recommended ***,the recommendations for PRM length should be applied only to intraoperative decision-making to prevent positive margins on the final *** that a negative resection margin is the ultimate goal of determining an adequate PRM,development and improvement of reliable methods to confirm a negative resection margin intraoperatively would minimize the extent of surgery and offer a better quality of life to more *** the same context,special attention has to be paid to patients who have advanced stage or diffuse-type gastric cancer,because they are more likely to have a positive ***,a wider excision with intraoperative frozen section(IFS) examination of the resection margin is *** all the attempts to avoid positive margins,there is still a certain rate of positive-margin *** the negative impact of a positive margin on prognosis is mostly obvious in low N stage patients,aggressive further management,such as extensive re-operation,is required for these *** conclusion,every possible preoperative and intraoperative evaluation should be thoroughly carried out to identify in advance the patients with a high risk of having positive margins;the

关键词： Resection margin Proximal resection margin Negative resection margin Positive resection margin Gastrectomy Gastric cancer

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Correlation analysis-based image segmentation approach for automatic agriculture vehicle

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2005年第10期6卷 1158-1162页

作者：张方明应义斌蒋焕煜 shin Beom-soo School of Biosystem Engineering and Food Science Zhejiang University Hangzhou 310029 China Department of Biological System Engineering Kangwon National University Chunchon Korea

It is important to segment image correctly to extract guidance information for automatic agriculture vehicle. If we can make the computer know where the crops are, we can extract the guidance line easily. Images were divided into some rec-tangle small windows, then a pair of 1-D arrays was constructed in each small windows. The correlation coefficients of every small window constructed the features to segment images. The results showed that correlation analysis is a potential approach for processing complex farmland for guidance system, and more correlation analysis methods must be researched.

关键词： Image segmentation Machine vision Correlation analysis Guidance

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Efficient and secure source authentication scheme for multicast user authentication

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Journal of Central South University 2013年第10期20卷 2741-2746页

作者： JEONG Yoon-su LEE Sang-hyuk shin Seung-soo Department of Information Communication Engineering Mokwon University Department of Electrical and Electronic Engineering Xi’an Jiaotong-Liverpool University Department of Information Security Tongmyong University

Multicast technology application has been widely utilized in broadband internet. Source authentication is one of the most needs for many multicast applications transferring real-time information such as stream video and online news. Because multicast current services provided to the group members are changed dynamically, data transferring by a group member is not used by the recipient. In order to verify the identity of the sender who sent the packet and to make sure that the data have not been tampered, an optimized source authentication scheme has been proposed to transfer the authentication information not to the next-door packet. The proposed method for multiple packets authenticates the source with a limited number of electronic signatures. The proposed method can reduce overhead compared to the method by adding a digital signature for every packet. In addition, by sending the generated electronic signature to the first packet and the last packet, it prevents the loss of consecutive packets, as well as a source authentication can be provided in real-time services.

关键词： multicast packet source authentication broadband Internet

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RTV silicone rubber composites reinforced with carbon nanotubes,titanium-di-oxide and their hybrid:Mechanical and piezoelectric actuation performance

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Nano Materials Science 2021年第3期3卷 233-240页

作者： Vineet Kumar Anuj Kumar Sung soo Han Sang-shin Park School of Mechanical Engineering Yeungnam UniversitySouth Korea School of Chemical Engineering Yeungnam UniversitySouth Korea

The use of nanofillers with high surface area and extreme purity in polymer composite is an effective strategy to obtain high performance polymeric ***,the effect of nanofillers such as carbon nanotubes(CNT),titanium dioxide(TiO_(2)),and their hybrid on rubber-based composites was *** this study,rubber nanocomposites were fabricated by using room temperature vulcanized(RTV)silicone rubber matrix and nanofillers(***,TiO_(2),and CNT-TiO_(2))through solution casting ***,the purity and surface area of CNT(purity:>96%and BET surface area:300 m2/g)and TiO_(2)(purity:>98%and BET surface area:165 m2/g)were estimated by field emission scanning electron microscopy/energy dispersive X-ray(FESEM-EDX)and adsorption *** mechanical properties of the rubber nanocomposites were enhanced by incorporating *** compressive modulus was 2.18 MPa for unfilled composites and increased to 6.8 MPa(CNT),3.95 MPa(CNT-TiO_(2)),and 2.44 MPa(TiO_(2))at 5 phr,***,the tensile strength was 0.54 MPa for unfilled composites and increased to 1.37 MPa(CNT),1.33 MPa(CNT-TiO_(2))and 0.61 MPa(TiO_(2))at 5 phr,***,the actuation displacement was improved with increasing input voltage and it was 2 mm for CNT,1.6 mm for CNT-TiO_(2) hybrid and 0.5 mm for TiO_(2) at 10 ***,a series of experiments show the potential application in piezoelectric actuation.

关键词： Multi-walled carbon nanotubes Titanium dioxide Hybrid Mechanical properties Piezoeletric actuation

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Corticosteroid-induced bradycardia in multiple sclerosis and maturity-onset diabetes of the young due to hepatocyte nuclear factor 4-alpha mutation:A case report

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World Journal of Clinical Cases 2022年第21期10卷 7415-7421页

作者： Sung-Yeon Sohn shin Yeop Kim In soo Joo Department of Neurology Ajou University School of MedicineAjou University Medical CenterSuwon 16499South Korea

BACKGROUND Intravenous steroid pulse therapy is the treatment of choice for acute exacerbation of multiple sclerosis(MS).Although steroid administration is generally welltolerated,cases of cardiac arrhythmia have been ***,we describe a young woman who developed marked sinus bradycardia and T-wave abnormalities after corticosteroid *** also present plausible explanations for the abnormalities observed in this *** SUMMARY An 18-year-old woman experienced vertiginous dizziness and binocular diplopia 1 wk prior to *** examination revealed left internuclear ophthalmoplegia with left peripheral-type facial *** initial laboratory results were consistent with those of type 2 *** magnetic resonance imaging revealed multifocal,non-enhancing,symptomatic lesions and multiple enhancing *** was diagnosed with MS and maturity-onset diabetes of the *** methylprednisolone was *** day 5 after methylprednisolone infusion,marked bradycardia with T-wave abnormalities were *** evaluation to elucidate the underlying conditions revealed a hepatocyte nuclear factor 4-alpha(HNF4A)gene *** treatment was discontinued under suspicion of corticosteroid-induced *** electrocardiogram changes returned to normal without complications two days after steroid *** Corticosteroid-induced bradycardia may have a significant clinical impact,especially in patients with comorbidities,such as HNF4A mutations.

关键词： Steroids Bradycardia Multiple sclerosis Maturity-onset diabetes of the young Hepatocyte nuclear factor 4-alpha Case report

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