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红外与激光工程 2017年第11期46卷 1-14页

作者： Yasha Saxena Chulhong kim Yao Junjie Department of Biomedical Engineering Duke University Departments of Creative IT Engineering and Electrical Engineering Pohang University of Science and Technology (POSTECH)

Photoacoustic imaging(PAI) or optoacoustic imaging, the modern application of an ancient physical discovery to biomedical imaging, is without doubt one of the most exciting imaging technologies that has drawn increasing attention from biomedical specialists. In PAI, the rich contrast of optical excitation is seamlessly combined with the high spatial resolution and large penetration depth of ultrasonic detection to produce clear images of optically scattering biological tissues. As a complementary imaging modality that surpasses the territory of traditional microscopic optical imaging, PAI has been explored for numerous biomedical studies, and hence enthusiastically embraced by researchers around the globe who have attested to its unique imaging capabilities, namely the deep penetration and functional *** surprisingly, as the market clearly sees the promise, the commercial production of PAI systems has grown apace with the technological advancements and clinical applications. The adoption of commercial PAI in research and clinical settings has however seen difficulties, majorly due to costs, regulatory blocks,and competition with mainstream technologies. Here, from a practical standpoint, a wide range of commercial PAI systems currently available in the market were introduced, their advantages and disadvantages were analyzed, and the design considerations for targeted applications were emphasized. The key technological, logistical, and clinical issues were also discussed that need to be solved to accelerate the technology translations. By doing so, it is hoped that a clearer picture of the future commercialization of PAI for clinicians, researchers, and industrial entrepreneurs will be presented.

关键词：光声成像产业化进程

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小议供应链中的“牛鞭效应”

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科技情报开发与经济 2008年第7期18卷 128-129页

作者：金成祚辽宁科技大学经济管理学院辽宁鞍山114044

阐述了牛鞭效应的含义,指出了牛鞭效应的危害,分析了产生牛鞭效应的原因,提出了减缓牛鞭效应的办法。

关键词：牛鞭效应供应商信息共享

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Recovery of metals and other beneficial products from coal fly ash： a sustainable approach for fly ash management

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International Journal of Coal Science & Technology 2016年第3期3卷 267-283页

作者： Prafulla Kumar Sahoo Kangjoo kim M. A. Powell Sk Md Equeenuddin Vale Institute of Technology Baventura da Silva BelemPara 66055-090 Brazil Department of Environmental Engineering Kunsan NationalUniversity Jeonbuk 573-701 Republic of Korea Prometeo SDIC Secretary of Higher Education ScienceTechnology and Innovation (SENESCYT) Quito Ecuador Department of Mining Engineering National Institute ofTechnology Rourkela Orissa 769008 India

Increasing production and disposal of coal fly ash （CFA） is a matter of serious environment concern. However, CFA contains various beneficial metals and mineral matters whose demand is increasing in the industrialized world, while natural supplies are diminishing. Therefore, recovery of these potential resources from CFA can be an alternative way to save mineral resources, as well as to reduce the environmental burden of CFA disposal. There are numerous methods developed for the recovery of beneficial products from CFA. Based on the US patents and journal literatures, the present review describes the recovery status and technologies of major elements such as Al, Si, Fe and Ti, and trace elements such as V, Ga, Ge, Se, Li, Mo, U, Au, Ag, Pt groups and rare earth elements （REEs） and other beneficial products such as magnetic materials, cenospheres, and unburned carbon from CFA. It also highlights the recovery efficiency and drawbacks for their extraction, and suggests future research to develop satisfactory results in terms of selective recovery and purification.

关键词： Coal fly ash Beneficial elements Recovery Hydrometallurgical methods Extraction efficiency

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Synergetic effects of shock waves with polydeoxyribonucleotides on rotator cuff tendon tear in a rabbit model

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BIOCELL 2021年第3期45卷 527-536页

作者： DONG HAN kim DONG RAK Kwon GI-YOUNG PARK YONG SUK MOON Department of Rehabilitation Medicine Catholic University of Daegu School of MedicineDaegu42472South Korea Department of Anatomy Catholic University of Daegu School of MedicineDaegu42472South Korea

This work aimed to investigate the synergetic therapeutic effects of polydeoxyribonucleotides(PDRN)combined with extracorporeal shock waves therapy(ESWT)and the effects of the therapy according to ESWT sequences on a chronic traumatic full-thickness rotator cuff tear(RCT)in rabbit *** this purpose,thirty-two rabbits were randomly allocated into 4 *** excision was made to create a 5-mm sized full-thickness RCT right proximal to the insertion site on the *** 6 weeks,4 different procedures(normal saline,Group 1;PDRN injection,Group 2;PDRN injection before ESWT,Group 3;PDRN injection after ESWT,Group 4)were *** injection and radial type ESWT were each performed 4 times per *** morphology,Immunohistochemistry,and motion analysis were performed at 4 weeks after *** parameters including tear size,Masson’s trichrome(MT)staining,anti-collagen 1 monoclonal antibody immunostaining(COL-1),proliferating cell nuclear antigen(PCNA),vascular endothelial growth factor(VEGF),anti-platelet endothelial cell adhesion molecule-1 polyclonal antibody(PECAM-1),and motion analysis,were significantly greater in Group 2,Group 3,and Group 4 than in Group *** Group 4,all parameters were significantly greater than in Group 2,and parameters including MT staining,COL-1,PCNA,PECAM-1,and fast walking time were significantly greater than Group *** were no significant differences between Group 2 and Group *** study demonstrated that PDRN injection alone and combined with ESWT were more effective than control treatment and applying ESWT before PDRN injection was also shown to yield better outcomes in parameters including angiogenesis,cell proliferation,and fast walking time in a rabbit model with chronic traumatic full-thickness ***,the application of ESWT before PDRN injection could be recommended for optimal outcomes of the conservative treatments when the patients with full-thickness RCT are not suitable in surgical treatment

关键词： Shoulder Rotator cuff Polydeoxyribonucleotides Extracorporeal shock waves

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Carbon nanotube-reinforced elastomeric nanocomposites: a review

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International Journal of Smart and Nano Materials 2015年第4期6卷 211-238页

作者： Bismark Mensah Han Gil kim Jong-Hwan Lee Sivaram Arepalli Changwoon Nah BK21 Haptic Polymer Composite Research Team Department of Polymer-Nano Science and TechnologyChonbuk National UniversityJeonju 561-756Republic of Korea Nano Science Consultants LLC HamptonVA 23666-6701USA

This review is focused on carbon nanotube(CNT)-elastomeric polymer nanocom-posites,which have attracted industrial and academic interest over the years due to their enhanced *** factors notably CNT type,surface modifica-tion,dispersion of CNT,and processing techniques that affect the physical properties of CNT-elastomeric polymer nanocomposites are reviewed,and several key physical properties,including tensile,electrical,and thermal properties,were also included in this *** of the key challenges that undermine the effectiveness of CNTs and their composites with elastomeric polymers,and the potential applications of CNT-elastomeric composites are also captured.

关键词： carbon nanotubes elastomeric polymers nanocomposites surface mod-ification physical properties

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Effect of thickness of planar nozzles on erosion depth of levee soils subjected to plunging water

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International Journal of Sediment Research 2018年第3期33卷 243-249页

作者： Chung Rak Song Jinwon kim James Tyler Kidd Alexander Cheng David Admiraal Department of Civil Engineering University of Nebraska-Lincoln

In this study, the effect of the thickness of a planar jet on the erosion depth when the jet impinges on a surface composed of cohesive soil was analytically and numerically evaluated. The results showed that the erosion depth was practically independent of the nozzle thickness for erosion depths shallower than the potential core length(i.e. the region of the jet in which the central flow velocity is the same as the nozzle velocity). The relation between nozzle thickness and erosion depth was non-linear with continuously variable slope for erosion depths deeper than the potential core length. Finally, the relation was approximately linear when the erosion depth converged to the equilibrium erosion depth. The findings of this study indicate that direct and fast prediction of the erosion depth in the field is possible using the data from a small scale soil erosion test with similar flow velocities.

关键词： Nozzle thickness Levee erosion Erosion depth Plunging water Planar nozzle

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Role of bile acids in colon carcinogenesis

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World Journal of Clinical Cases 2018年第13期6卷 577-588页

作者： Thi Thinh Nguyen Trong Thuan Ung Nam Ho kim Young Do Jung Department of Biochemistry Chonnam National University Medical School Department of Nephrology Chonnam National University Medical School

Bile acids(BAs)are cholesterol derivatives synthesized in the liver and then secreted into the intestine for lipid *** are numerous scientific reports describing BAs,especially secondary BAs,as strong carcinogens or promoters of colon ***,BAs act as strong stimulators of colorectal cancer(CRC)initiation by damaging colonic epithelial cells,and inducing reactive oxygen species production,genomic destabilization,apoptosis resistance,and cancer stem cells-like ***,BAs promote CRC progression via multiple mechanisms,including inhibiting apoptosis,enhancing cancer cell proliferation,invasion,and *** are diverse signals involved in the carcinogenesis mechanism of BAs,with a major role of epidermal growth factor receptor,and its down-stream signaling,involving mitogen-activated protein kinase,phosphoinositide 3-kinase/Akt,and nuclear factor kappa-light-chain-enhancer of activated B *** regulate numerous genes including the human leukocyte antigen class I gene,p53,matrix metalloprotease,urokinase plasminogen activator receptor,Cyclin D1,cyclooxygenase-2,interleukin-8,and miRNAs of CRC cells,leading to CRC *** evidence suggests that targeting BAs is an efficacious strategies for CRC prevention and treatment.

关键词： Apoptosis resistance Cancer stemness Bile acids Colorectal cancer Reactive oxygen species Angiogenesis

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Visual quality assessment after presbyopic laser in-situ keratomileusis

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International Journal of Ophthalmology(English edition) 2018年第3期11卷 462-469页

作者： Dong Hui Lim Eui-Sang Chung Myoung Joon kim Tae-Young Chung Department of Ophthalmology Samsung Medical Center Sungkyunkwan University School of Medicine Department of Preventive Medicine Graduate School the Catholic University of Korea Department of Ophthalmology University of Ulsan College of MedicineAsan Medical Center

AIM： To assess visual quality after presbyopia correction using an aspheric ablation profile and a micro-monovision protocol. METHODS： This is a retrospective interventional study. Fifty-four eyes of 27 patients （mean age, 50.2±7.5y） who underwent presbyopia correction with an aspheric micro-monovision protocol were enrolled. The values of modulation transfer function （MTF） cutoff frequency, Strehl ratio, objective scattering index （OSI） and accommodation range were quantitatively assessed using the HD analyzer. Preoperative and postoperative contrast sensitivity （CS） at far （2.5 m） and near （40 cm） distance and higher-order aberrations （HOAs） were analyzed. Subjective visual satisfaction was evaluated by self-reported questionnaire regarding optical visual symptoms. RESULTS： One year after presbyopia correction, no significant differences were found in the MTF cutoff frequency, Strehl ratio and OSI, however, the lID analyzer accommodation range significantly differed postoperatively （P=0.004）. Postoperative CS at 12 and 18 cpd at near showed statistically significant improvement （P=0.020 and 0.008, respectively）. Visual performance by self-reported questionnaire revealed satisfactory results in terms of subjective visual quality improvement. CONCLUSION： Objective optical quality parameters show good visual outcomes. Subjective visual quality assessed by self-reported questionnaire in the presbyopia correction group show satisfactory results.

关键词： presbyopia correction laser blended vision visual quality LASIK

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Regression of gastric endoscopic submucosal dissection induced polypoid nodular scar after Helicobacter pylori eradication:A case report

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World Journal of Clinical Cases 2022年第34期10卷 12793-12798页

作者： Byung Chul Jin Ae Ri Ahn Seong-Hun kim Seung Young Seo Department of Internal Medicine Jeonbuk National University Medical SchoolResearch Institute of Clinical Medicine of Jeonbuk National University-Biomedical Research Institute of Jeonbuk National University HospitalJeonju 54907South Korea Department of Pathology Jeonbuk National University Medical SchoolResearch Institute of Clinical Medicine of Jeonbuk National UniversityBiomedical Research Institute of Jeonbuk National University Hospitaland Research Institute for Endocrine SciencesJeonju 56445South Korea

BACKGROUND Endoscopic submucosal dissection(ESD)is the treatment of choice for early gastric cancer and premalignant gastric *** some cases,ESD induced ulcer heals as a polypoid nodular scar(PNS).These scars may make the physicians raise several clinical implications such as post-ESD neoplastic *** SUMMARY We described a case of gastric ESD induced PNS which is regressed after Helicobacter pylori(***)eradication.A 58-year-old male patient was referred to the outpatient clinic for evaluation and treatment of gastric low-grade dysplasia(LGD).ESD was performed.A PNS was developed at the ESD *** endoscopic biopsy was done and there was no histological evidence of remnant tumor or recurrence but a hyperplastic mucosal *** PNS showed increase in size in follow-up endoscopy,and the biopsy specimen demonstrated *** *** eradication was done and the PNS was *** *** eradication is considerable for the regression of PNS if *** infesta tion is confirmed.

关键词： Polypoid nodular scar Helicobacter pylori Endoscopic submucosal dissection Case report

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Temperature coefficient of resistivity of TiAlN films deposited by radio frequency magnetron sputtering

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Transactions of Nonferrous Metals Society of China 2013年第2期23卷 433-438页

作者： Min-Ho PARK Sang-Ho kim School of Energy Materials and Chemical Engineering Korea University of Technology and Education 1600 Chungjeol-ro Byungcheon-myun Dongnam-gu Cheonan Chungnam 330-708 Korea

Titanium aluminum nitride （TiAlN） film, as a possible substitute for the conventional tantalum nitride （TAN） or tantalum-aluminum （TaAl） heater resistor in inkjet printheads, was deposited on a Si（100） substrate at 400 ℃ by radio frequency （RF） magnetron co-sputtering using titanium nitride （TIN） and aluminum nitride （AlN） as ceramic targets. The temperature coefficient of resistivity （TCR） and oxidation resistance, which are the most important properties of a heat resistor, were studied depending on the plasma power density applied during sputtering. With the increasing plasma power density, the crystallinity, grain size and surface roughness of the applied film increased, resulting in less grain boundaries with large grains. The Ti, Al and N binding energies obtained from X-ray photoelectron spectroscopy analysis disclosed the nitrogen deficit in the TiAlN stoichiometry that makes the films more electrically resistive. The highest oxidation resistance and the lowest TCR of-765.43×10^-6 K-l were obtained by applying the highest plasma power density.

关键词： inkjet printhead TiAlN radio frequency magnetron sputtering temperature coefficient of resistivity

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