检索结果-南通市图书馆

Corrosion and optimum corrosion protection potential of friction stir welded 5083-O Al alloy for leisure ship

在线全文

学校读者我要写书评

暂无评论

中国有色金属学会会刊：英文版 2009年第4期19卷 898-903页

作者： Sung-Hyeon PARK jong-Shin KIM Min-Su han Seong-jong KIM Division of Maritime Transportation System Mokpo Maritime University Korea Register of Shipping Division of Marine Engineering Mokpo Maritime University

Electrochemical tests were undertaken to determine the optimum conditions in seawater for corrosion protection of friction stir-welded 5083-O Al *** trend observations show that the limiting potential that avoids the effects of hydrogen embrittlement is -1.6 V,corresponding to the crossover point between concentration polarization and activation ***,the optimum protection potential is between -1.5 and -0.7 V since the current density at these values is low in the potentiostatic *** a galvanic cell is formed in the seawater,the welds exhibit electrochemically stable *** parts in galvanic tests with various area ratios are stable and have excellent anticorrosion characteristics.

关键词：搅拌摩擦焊接保护电位海水腐蚀铝合金氧铝船舶休闲防腐

Wavelet Estimation in Heteroscedastic Model Under Censored Samples

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2007年第12期23卷 2253-2268页

作者： han Ying LIANG jong IL BAEK Department of Mathematics Tongji University Shanghai 200092 P. R. China School of Mathematics & Informational Statistics and Institute of Basic Natural Science Wonkwang University Ik-San 570-749 South Korea

Consider the heteroscedastic regression model Yi = g（xi）＋ σiei, 1 ≤ i ≤ n, where σi^2 = f（ui）, here （xi, ui） being fixed design points, g and f being unknown functions defined on [0, 1], ei being independent random errors with mean zero. Assuming that Yi are censored randomly and the censored distribution function is known or unknown, we discuss the rates of strong uniformly convergence for wavelet estimators of g and f, respectively. Also, the asymptotic normality for the wavelet estimators of g is investigated.

关键词： censored sample heteroscedastic regression model wavelet estimator strong unform convergence rate asymptotic normality

Pembrolizumab-induced psoriatic arthritis treated with disease-modifying anti-rheumatic drugs in a patient with gastric cancer:A case report

在线全文

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2023年第1期11卷 218-224页

作者： Sehan Kim jong Hee Sun Hongsik Kim Hee Kyung Kim Yaewon Yang Jun Su Lee In Ah Choi Hye Sook han Department of Internal Medicine Chungbuk National University HospitalCheongju 28644South Korea Department of Gastroenterology Asan Medical CenterUniversity of Ulsan College of MedicineSeoul 05505South Korea Department of Internal Medicine Chungbuk National University HospitalChungbuk National University College of MedicineCheongju 28644South Korea

BACKGROUND Immune checkpoint inhibitor(ICI)-induced rheumatic immune-related adverse events(ir AEs)have been infrequently reported,and the treatment of severe or refractory arthritis as ir AEs has not been established *** SUMMARY The patient was a 67-year-old man with a history of well-controlled foot psoriasis who presented with *** had received pembrolizumab for metastatic gastric adenocarcinoma 2 mo *** examination revealed erythematous swelling in the distal interphalangeal joints,left shoulder,and both *** had plaque psoriasis with psoriatic nail dystrophy and dactylitis in the distal joints of the fingers and *** markers including C-reactive protein and erythrocyte sedimentation rate were elevated but rheumatoid factor and anticyclic citrullinated peptide antibody were *** patient was diagnosed with psoriatic arthritis(PsA)and started on methylprednisolone 1 mg/kg/day after pembrolizumab ***,despite 1 wk of methylprednisolone treatment,PsA worsened;hence,leflunomide and methotrexate were *** 4 wk of steroid treatment,PsA worsened and improved repeatedly with steroid ***,the therapy was intensified to include etanercept,a tumor necrosis factor inhibitor,which ultimately resulted in adequate PsA *** This is the first report of ICI-induced PsA in a gastric cancer *** rheumatic ir AEs with refractory severe arthritis may require disease-modifying anti-rheumatic drugs and long-term management.

关键词： Pembrolizumab Psoriatic arthritis Disease-modifying anti-rheumatic drugs Gastric cancer Case report

Adult dental epithelial stem cell-derived organoids deposit hydroxylapatite biomineral

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Oral Science 2023年第4期15卷 676-690页

作者： Hyun-Yi Kim Victoria Cooley Eun-Jung Kim Shujin Li jong-Min Lee Dina Sheyfer Wenjun Liu Ophir D.Klein Derk Joester han-Sung Jung NGeneS Inc. Ansan-siGyeonggi-doKorea Department of Materials Science and Engineering Northwestern UniversityEvanstonILUSA X-ray Science Division Advanced Photon SourceArgonne National LaboratoryLemontILUSA Division in Anatomy and Developmental Biology Department of Oral BiologyOral Science Research CenterBK21 FOUR ProjectYonsei University College of DentistrySeoulKorea Department of Orofacial Sciences and Program in Craniofacial Biology University of CaliforniaSan FranciscoCAUSA Department of Pediatrics Cedars-Sinai Guerin Children’sLos AngelesCAUSA

Ameloblasts are specialized cells derived from the dental epithelium that produce enamel,a hierarchically structured tissue comprised of highly elongated hydroxylapatite(OHAp)*** unique function of the epithelial cells synthesizing crystallites and assembling them in a mechanically robust structure is not fully elucidated yet,partly due to limitations with in vitro experimental ***,we demonstrate the ability to generate mineralizing dental epithelial organoids(DEOs)from adult dental epithelial stem cells(aDESCs)isolated from mouse incisor *** expressed ameloblast markers,could be maintained for more than five months(11 passages)in vitro in media containing modulators of Wnt,Egf,Bmp,Fgf and Notch signaling pathways,and were amenable to *** transplanted underneath murine kidney capsules,organoids produced OHAp crystallites similar in composition,size,and shape to mineralized dental tissues,including some enamel-like elongated *** are thus a powerful in vitro model to study mineralization process by dental epithelium,which can pave the way to understanding amelogenesis and developing regenerative therapy of enamel.

关键词： epithelium maintained specialized

One-to-many authentication for access control in mobile pay-TV systems

在线全文

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2016年第5期59卷 118-132页

作者： Debiao HE Neeraj KUMAR han SHEN jong-Hyouk LEE State Key Laboratory of Software Engineering Computer School Wuhan University Fujian Provincial Key Laboratory of Network Security and Cryptology Fujian Normal University Department of Computer Science and Engineering Thapar University Department of Computer Science and Engineering Sangmyung University

In traditional authentication schemes for access control in mobile pay-TV systems, one-to-one delivery is used, i.e., one authentication message per request is delivered from a head-end system(HES) to a subscriber. The performance of one-to-one delivery for authentication is not satisfactory as it requires frequent operations which results in high bandwidth consumption. To address this issue, one-to-many authentication for access control in mobile pay-TV systems was developed. It requires only one broadcasted authentication message from a HES to subscribers if there are many requests for the same service in a short period of ***, later it was revealed that the one-to-many authentication scheme was vulnerable to an impersonation attack, i.e., an attacker without any secret key could not only impersonate the mobile set(MS) to the HES but also impersonate the HES to the MS. Then, a new scheme has been recently introduced for secure operations of one-to-many authentication. However, as shown in this paper, the recent work for one-to-many authentication is still vulnerable to the impersonation attack. To mitigate this attack, in this paper, a new scheme for one-tomany authentication using bilinear pairing is proposed that eliminates security weaknesses in the previous *** obtained depict that the new improved scheme in this paper provides better performance in terms of computation and communication overheads.

关键词： authentication bilinear pairing conditional access system mobile pay-TV

Flexible micro-LED display and its application in Gbps multi-channel visible light communication

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

npj Flexible Electronics 2022年第1期6卷 973-979页

作者： Luhing Hu Jaeyong Choi Sumin Hwangbo Do-Hoon Kwon Bongkyun Jang Seunghyeon Ji Jae-Hyun Kim Sang-Kook han jong-Hyun Ahn School of Electrical and Electronic Engineering Yonsei UniversitySeoul 03722Republic of Korea Department of Nanomechanics Nano-Convergence Mechanical Systems Research DivisionKorea Institute of Machinery&Materials(KIMM)156 Gajeongbuk-roYuseong-guDaejeon 34103Republic of Korea

A flexible full-color micro-LED display with high mechanical robustness was fabricated by printing quantum dots(QDs)on a blue micro-LED array using standard *** red and green colors yielded from QDs exhibit a better color gamut than conventional color *** light conversion efficiency was enhanced by adding TiO2 nanoparticles to the QD-photoresist *** full-color micro-LED display was successfully mounted on various unusual substrates such as curved glass,fabrics,and human skin,enabling diverse optoelectronic *** addition,wireless multi-channel visible light communication(VLC)based on the wavelength-division-multiplexing orthogonal-frequency-division-multiplexing(WDM-OFDM)technique was demonstrated using a QD-based color micro-LED panel.A high data transmission rate of 1.9 Gbps was successfully obtained owing to the high electrical-optical modulation bandwidth of the QD-based micro-LED panel.

关键词： communication Gbps visible

Electrochemical characteristics of stainless steel using impressed current cathodic protection in seawater

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

中国有色金属学会会刊：英文版 2009年第4期19卷 930-934页

作者： Seok-Ki JANG Min-Su han Seong-jong KIM Division of Marine Engineering Mokpo Maritime University

Stainless steels such as STS 304,316 and 630 are frequently used as shaft materials in small fiber reinforced polymer(FRP) fishing *** the shaft material is exposed to a severely corrosive environment such as seawater,it should be protected using appropriate *** impressed current cathodic protection was used to inhibit corrosion in shaft *** anodic polarization,passivity was remarkably more evident in STS 316 stainless steel than in STS 304 and STS *** pitting potentials of STS 304,316,and 630 stainless steels were 0.30,0.323,and 0.260 V,*** concentration polarization due to oxygen reduction and activation polarization due to hydrogen generation were evident in the cathodic polarization trends of all three stainless *** 316 had the lowest current densities in all potential ranges,and STS 630 had the *** analysis showed that STS 316 was the most noble in the *** addition,the corrosion current density was the lowest for STS 316.

关键词：外加电流阴极保护 316不锈钢电化学特性海水腐蚀电流密度材料腐蚀阳极极化 STS

Brain endothelial cell-derived extracellular vesicles with a mitochondria-targeting photosensitizer effectively treat glioblastoma by hijacking the blood-brain barrier

在线全文

学校读者我要写书评

暂无评论

药学学报:英文版 2023年第9期13卷 3834-3848页

作者： Thuy Giang Nguyen Cao Ji Hee Kang Su Jin Kang Quan Truong Hoang han Chang Kang Won jong Rhee Yu Shrike Zhang Young Tag Ko Min Suk Shim Division of Bioengineering Incheon National UniversityIncheon 22012Republic of Korea College of Pharmacy Gachon UniversityIncheon 21936Republic of Korea Department of Pharmacy Integrated Research Institute of Pharmaceutical Sciencesand BK21 PLUS Team for Creative Leader Program for Pharmacomics-based Future PharmacyCollege of Pharmacythe Catholic University of KoreaGyeonggi-do 14662Republic of Korea Research Center for Bio Materials&Process Development Incheon National UniversityIncheon 22012Republic of Korea Division of Engineering in Medicine Department of MedicineBrigham and Women’s HospitalHarvard Medical SchoolCambridgeMA 02139USA

Glioblastoma(GBM)is the most aggressive malignant brain tumor and has a high mortality *** therapy(PDT)has emerged as a promising approach for the treatment of malignant brain ***,the use of PDT for the treatment of GBM has been limited by its low blood-brain barrier(BBB)permeability and lack of cancer-targeting ***,brain endothelial cell-derived extracellular vesicles(bEVs)were used as a biocompatible nanoplatform to transport photosensitizers into brain tumors across the *** enhance PDT efficacy,the photosensitizer chlorin e6(Ce6)was linked to mitochondria-targeting triphenylphosphonium(TPP)and entrapped into *** Ce6(TPP-Ce6)selectively accumulated in the mitochondria,which rendered brain tumor cells more susceptible to reactive oxygen species-induced apoptosis under light ***,the encapsulation of TPP-Ce6 into b EVs markedly improved the aqueous stability and cellular internalization of TPP-Ce6,leading to significantly enhanced PDT efficacy in U87MG GBM *** in vivo biodistribution study using orthotopic GBM-xenografted mice showed that b EVs containing TPP-Ce6[b EV(TPP-Ce6)]substantially accumulated in brain tumors after BBB penetration via transferrin receptor-mediated *** such,b EV(TPP-Ce6)-mediated PDT considerably inhibited the growth of GBM without causing adverse systemic toxicity,suggesting that mitochondria are an effective target for photodynamic GBM therapy.

关键词： Extracellular vesicle Chlorin e6 Triphenylphosphonium Mitochondria-targeting photosensitizer Photodynamic therapy Blood-brain barrier Glioblastoma Transferrin receptor

Improvement of Shape Recognition Performance of Sendzimir Mill Control Systems Using Echo State Neural Networks

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research(International) 2014年第3期21卷 321-327页

作者： Jung-hyun PARK Seong-ik han jong-shik KIM School of Mechanical Engineering Pusan National University School of Electrical Engineering Pusan National University

High rigidity twenty-high Sendzimir mills （ZRMs） are widely used for rolling stainless steels, silicon sheets, etc. A ZRM uses a small diameter work roll to produce massive rolling forces. Since a work roll with a small diameter can be bent easily, strips often have complex shapes with mixed quarter and deep edge waves in the shape of plates. In order to solve this problem, fuzzy neural network controls are generally used for shape： recognition in ZRM control systems. Among various neural network types, the multi-layer perceptron （MLP） is typically used in current ZRMs. However, an MLP causes the loss of a large amount of shape recognition data. To improve the shape recognition per- formance of ZRM control systems, echo state networks （ESNs） are proposed to be used. Through simulation re- sults, it is found that shape recognition performance could be improved using the proposed ESN method.

关键词： Sendzimir mill neural network multi-layer perceptron echo state network shape recognition