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Transparent Access to Heterogeneous IoT Based on Virtual Resources

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Computers, Materials & Continua 2023年第3期74卷 4983-4999页

作者： Wenquan Jin Sunhwan Lim Young-Ho suh.Chanwon park Dohyeun Kim Big Data Research Center Jeju National UniversityJeju63243Korea Autonomous IoT Research Section Intelligent Convergence Research LaboratoryElectronics and Telecommunications Research InstituteDaejeon34129Korea Department of Computer Engineering Jeju National UniversityJeju63243Korea

The Internet of Things(IoT)inspires industries to deploy a massive number of connected devices to provide smart and ubiquitous services to influence our daily *** computing leverages sufficient computation and storage at the edge of the network to enable deploying complex functions closer to the environment using Internet-connected *** to the purpose of the environment including privacy level,domain functionality,network scale and service quality,various environment-specific services can be provided through heterogeneous applications with sensors and actuators based on edge ***,for providing user-friendly service scenarios based on the transparent access to heterogeneous devices in edge computing,a consistent interface shall be provided to deliver services from edge computing to *** this paper,we propose transparent computing based on virtual resources to access heterogeneous IoT devices without considering the underlying network configuration at the edge of the *** supporting transparent access to different edge computing environments through a consistent interface,the virtual resource of edge gateway is proposed to bridge the Internet and devices which are deployed on the edge of the *** proposed edge gateway exposes the services of the Internet of Things devices to the Internet using virtual resources that represent the resources of physical *** virtual resources provide a consistent interface to enable clients to access devices in edge computing without considering underlying *** virtual resource is generated by the resource directory in the edge gateway through the registration of a *** on the device registration,the device information is stored in the gateway to link virtual resources and devices for translating messages according to the destination protocols and identifying physical devices that are represented by virtual ***,through collaboration with the serv

关键词： Internet of things edge computing edge gateway transparent computing virtualization resource directory virtual resource

Gastric heterotopia of colon found cancer workup in liver abscess:A case report

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World Journal of Clinical Cases 2022年第15期10卷 5012-5017页

作者： Jun Gi park Jeong Ill suh.Yeo Un Kim Department of Internal Medicine College of MedicineDongguk UniversityGyeongju 38067South Korea

BACKGROUND Recently reported cases of pyogenic liver abscess associated with colonic cancer in the absence of underlying disease,have included a small number of cases of gastric heterotopia(GHT).GHT is a congenital anomaly composed of ectopic gastric mucosa and can occur anywhere in the gastrointestinal tract but is more frequently encountered in the cervical ***,it is rarely observed in ***,most reported cases of GHT of the colon involved the rectum,and GHT involving the colon proximal to the rectum is *** SUMMARY An 83-year-old male patient presented with fever and a diagnosis of pyogenic liver *** was performed for colon cancer workup and revealed a 1.0 cm sized polyp at the transverse *** polyp was removed by endoscopic mucosal resection by monopolar electrocauterization using a *** examination revealed *** administering intravenous antibiotics,the patient recovered *** GHT in the colon could affect the development of pyogenic liver abscess by enabling hematogenous propagation of Klebsiella pneumoniae through mucosal ***,more study is needed due to the lack of cases.

关键词： Gastric heterotopia Colon Liver abscess Case report

Advanced heterolytic H_(2) adsorption of K-added Ru/MgO catalysts for accelerating hydrogen storage into aromatic benzyltoluenes

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Journal of Energy Chemistry 2022年第8期31卷 333-343,I0009页

作者： Tae Wan Kim Hwiram Jeong Yeongin Jo Dongun Kim Ji Hoon park Seok Ki Kim Young-Woong suh Department of Chemical Engineering Hanyang UniversitySeoul 04763Republic of Korea Environmental&Sustainable Resources Research Center Korea Research Institute of Chemical TechnologyDaejeon 34114Republic of Korea Department of Chemical Engineering Ajou UniversitySuwon 16499Republic of Korea

Herein,we report a highly active K-added Ru/MgO catalyst for hydrogen storage into aromatic benzyltoluenes at low temperatures to advance liquid organic hydrogen carrier *** hydrogenation activity of Ru/K/MgO catalysts exhibits a volcano-shaped dependence on the K content at the maximum with 0.02 wt%.This is in good agreement with the strength and capacity of H_(2) adsorption derived from basicity,despite a gradual decrease in the textural property and the corresponding increase in the Ru particle size with increasing the K *** functional theory calculations show that heterolytic hydrogen adsorption properties(strength and polarization)are facilitated up to a specific density of K on the Ru–MgO interface and excessive K suppresses heterolytic H_(2) adsorption by direct interaction between K and hydrogen,assuring the hydrogenation activity and H_(2) adsorption capability of Ru/K/MgO ***,the Ru/K/MgO catalyst,when K is added in an optimal amount,is highly effective to accelerate hydrogen storage kinetics at low temperatures owing to the enhanced heterolytic H_(2) adsorption.

关键词： Chemical hydrogen storage Supported Ru catalysts Ru–MgO interface Heterolytic H_(2)adsorption Charge transfer Potassium promotion

Tailored BiVO_(4)/In_(2)O_(3)nanostructures with boosted charge separation ability toward unassisted water splitting

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Carbon Energy 2023年第6期5卷 45-59页

作者： Mi Gyoung Lee Jin Wook Yang Ik Jae park Tae Hyung Lee Hoonkee park Woo Seok Cheon Sol ALee Hyungsoo Lee Su Geun Ji Jun Min suh.Jooho Moon Jin Young Kim Ho Won Jang Department of Materials Science and Engineering Research Institute of Advanced MaterialsSeoul National UniversitySeoulRepublic of Korea Country Department of Applied Physics Sookmyung Women's UniversitySeoulRepublic of Korea Department of Materials Science and Engineering Yonsei UniversitySeoulRepublic of Korea Advanced Institute of Convergence Technology Seoul National UniversitySuwonRepublic of Korea

The development of new heterostructures with high photoactivity is a breakthrough for the limitation of solar-driven water ***,we first introduce indium oxide(In_(2)O_(3))nanorods(NRs)as a novel electron transport layer for bismuth vanadate(BiVO_(4))with a short charge diffusion ***_(2)O_(3)NRs reinforce the electron transport and hole blocking of BiVO_(4),surpassing the state-of-the-art photoelectrochemical performances of BiVO_(4)-based ***,a tannin-nickel-iron complex(TANF)is used as an oxygen evolution catalyst to speed up the reaction *** final TANF/BiVO_(4)/In_(2)O_(3)NR photoanode generates photocurrent densities of 7.1 mAcm^(−2) in sulfite oxidation and 4.2 mA cm^(−2) in water oxidation at 1.23 V versus the reversible hydrogen ***,the“artificial leaf,”which is a tandem cell with a perovskite/silicon solar cell,shows a solar-to-hydrogen conversion efficiency of 6.2%for unbiased solar water *** reveal significant advances in the photoactivity of TANF/BiVO_(4)/In_(2)O_(3)NRs from the tailored nanostructure and band structure for charge dynamics.

关键词： bismuth vanadate heterojunction indium oxide nanostructure photoelectrochemical water splitting

High-responsivity InAs quantum well photo-FET integrated on Si substrates for extended-range short-wave infrared photodetector applications

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光子学研究:英文版 2023年第8期11卷 1465-1473页

作者： DAEHWAN AHN SUNGHAN JEON †HOYOUNG suh.SEUNGWAN WOO RAFAEL JUMAR CHU DAEHWAN JUNG WON JUN CHOI DONGHEE park JIN-DONG SONG WOO-YOUNG CHOI JAE-HOON HAN Center for Opto-Electronic Materials and Devices Korea Institute of Science and Technology(KIST)Seoul 02792Republic of Korea Department of Electrical and Electronic Engineering Yonsei UniversitySeoul 03722Republic of Korea

Low-intensity light detection necessitates high-responsivity *** achieve this,we report In_(0.53)Ga_(0.47)As∕In As∕In_(0.53)Ga_(0.47)As quantum well(InAs QW)photo-field-effect-transistors(photo-FETs)integrated on a Si substrate using direct wafer *** of the In As QW channel was carefully designed to achieve higher effective mobility and a narrower bandgap compared with a bulk In_(0.53)Ga_(0.47)As,while suppressing the generation of defects due to lattice ***-performance 2.6 nm In As QW photo-FETs were successfully demonstrated with a high on/off ratio of 10~5 and a high effective mobility of 2370 cm^(2)∕(V·s).The outstanding transport characteristics in the InAs QW channel result in an optical responsivity 1.8 times greater than InGaAs photo-FETs and the fast rising/falling ***,we experimentally confirmed that the InAs QW photo-FET can detect light in the short-wavelength infrared(SWIR;1.0–2.5μm)near 2μm thanks to bandgap engineering through In As QW *** result suggests that the InAs QW photo-FET is promising for high-responsivity and extended-range SWIR photodetector applications.

关键词： responsivity quantum wave

Effect of molybdenum on interfacial properties of titanium carbide reinforced Fe composite

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Journal of Materials Science & Technology 2022年第12期107卷 252-258页

作者： Seungchan Cho Junghwan Kim Ilguk Jo Jae Hyun park Jaekwang Lee Hyun-Uk Hong Bong Ho Lee Wook Ryol Hwang Dong-Woo suh.Sang-Kwan Lee Sang-Bok Lee Composites Research Division Korea Institute of Materials Science(KIMS)Changwon 51508South Korea Advanced Materials Engineering Dong-Eui UniversityBusan 47340South Korea Department of Aerospace and Software Engineering Gyeongsang National UniversityJinju 52828South Korea Department of Physics Pusan National UniversityBusan 46241South Korea Department of Materials Convergence and System Engineering Changwon National UniversityChangwon 51140South Korea Center for Core Research Facilities Daegu Gyeongbuk Institute of Science and TechnologyDaegu 42988South Korea School of Mechanical Engineering Gyeongsang National UniversityJinju 52828South Korea Graduate Institute of Ferrous Technology Pohang University of Science and TechnologyGyeongbuk 37673South Korea

This study shows that the mechanical strength of the composite of Fe matrix and titanium carbide(Ti C)ceramic particles is significantly enhanced with addition of molybdenum(Mo) atoms. Ti C reinforced Fe(Fe-0.2C-7Mn) composites with and without Mo were fabricated by a liquid pressing infiltration(LPI)process and the effect of Mo on interfacial properties of TiC–Fe composite was investigated using atomic probe tomography(APT) analysis, molecular dynamics(MD) simulations, first-principle density functional theory(DFT), and thermodynamic calculations. First, DFT calculations showed that total energies of the Mo-doped Ti C–Fe superlattices strongly depend on the position of Mo defects, and are minimized when the Mo atom is located at the TiC/Fe interface, supporting the probable formation of MoC-like interphase at the TiC/Fe interface region. Then, APT analysis confirmed the DFT predictions by finding that about6.5 wt.% Mo is incorporated in the Ti C–Fe(Mo) composite and that sub-micrometer thick(Ti,Mo)C interphase is indeed formed near the interface. The MD simulations show that Mo atoms migrate to the Mo-free TiC–Fe interface at elevated temperatures and the mechanical strength of the interface is considerably enhanced, which is in good agreement with experimental observations.

关键词： Metal matrix composites(MMCs) Titanium carbide Fe matrix composite Infiltration Molybdenum Interfacial property

Calcium-dependent proteasome activation is required for axonal neurofilament degradation

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Neural Regeneration Research 2013年第36期8卷 3401-3409页

作者： Joo Youn park So Young Jang Yoon Kyung Shin Duk Joon suh.Hwan Tae park Department of Physiology Mitochondria Hub Regulation Center College of Medicine Dong-A University

Even though many studies have identified roles of proteasomes in axonal degeneration, the mo- lecular mechanisms by which axonal injury regulates proteasome activity are still unclear. In the present study, we found evidence indicating that extracellular calcium influx is an upstream regulator of proteasome activity during axonal degeneration in injured peripheral nerves. In degenerating axons, the increase in proteasome activity and the degradation of ubiquitinated proteins were sig- nificantly suppressed by extracellular calcium chelation. In addition, electron microscopic findings revealed selective inhibition of neurofilament degradation, but not microtubule depolymerization or mitochondrial swelling, by the inhibition of calpain and proteasomes. Taken together, our findings suggest that calcium increase and subsequent proteasome activation are an essential initiator of neurofilament degradation in Wallerian degeneration.

关键词： neural regeneration peripheral nerve injury neurofilament degradation sciatic nerve calcium calpain mitochondria microtubule depolymerization axon axon degeneration neuroregeneration

Efficient detection of pathogen virus in sand dabs,Paralichthys olivaceus using loop-mediated isothermal amplification(LAMP)

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Acta Oceanologica Sinica 2016年第8期35卷 44-50页

作者： HWANG Jinik park So Yun suh.Sung-Suk park Mirye LEE Sukchan LEE Taek-Kyun South Sea Environment Research Department Korea Institute of Ocean Science and TechnologyGeoje 53201Republic of Korea Korea University of Science and Technology Daejeon 34113Republic of Korea Department of Genetic Engineering Sungkyunkwan UniversitySuwon 16419Republic of Korea

Viral hemorrhagic septicemia virus（VHSV） and marine birnavirus（MABV） are the causative pathogens for some of the most explosive epidemics of emerging viral diseases in many Asian countries, leading to huge economic losses in aquaculture. Rapid molecular detection for surveillance or diagnosis has been a critical component in reducing the prevalence of pathogen infection. The loop-mediated isothermal amplification（LAMP） of DNA is currently one of the most commonly used molecular diagnostic tools, as it is simple, quick, and easy to amplify target DNA under isothermal conditions. In the present study, a novel and highly specific LAMP assay for the sensitive and rapid detection of VHSV and MABV infection in fish was developed. Using a set of synthesized primers matching a specific region of the genome, the efficiency and specificity of the LAMP assay were optimized in terms of the reaction temperature and DNA polymerase concentration, as they are the main determinants of the sensitivity and specificity of the LAMP assay. In particular, we demonstrated that our assay could be applied to efficient detection of VHSV and MABV infection in the wild fish, Paralichthys olivaceus. Our results demonstrate the simplicity and convenience of this method for the detection of viral infection in aquatic organisms.

关键词： viral hemorrhagic septicaemia virus(VHSV) marine birnavirus(MABV) polymerase chain reaction loop-mediated isothermal amplification

Phenol content,antioxidant and tyrosinase inhibitory activity of mangrove plants in Micronesia

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Asian Pacific Journal of Tropical Medicine 2014年第7期7卷 531-535页

作者： Sung-Suk suh.Jinik Hwang Mirye park Heung-Sik park Taek-Kyun Lee South Sea Environment Research Department.Korea Institute of Ocean Science and Technology Korea South Pacific Ocean Research Center Korea Institute of Ocean Science and Technology

Objective:To find out and compare the in vitro antioxidant and tyrosinase inhibitory activities of two species of mangrove ***:Mangrove samples were harvested at the shoreline on the island of Weno,Chuuk State in *** phenol content,antioxidant activity(based on DPPH-free radical scavenging)and tyrosinase inhibitory activity in different tissues(leaves,barks and roots)of Rhizophora stylosa(***)and Sonneratia alba(***),collected from the island of ***:Total phenol content ranged from 4.87 to 11.96 mg per g of freeze dried *** highest antioxidant activity was observed in *** bark(85.5%).The highest tyrosinase inhibitory activity was found in *** ***,total phenol content and antioxidant activity were higher in methanol extracts than in aqueous ***:Taken together,the results of this study proved that mangroves can be excellent sources of antioxidant compounds.

关键词： Rhizophora stylosa Sonneratia alba Phebolics Antioxidant activity Tyrosinase inhibitory activity