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Tribological properties of multilayer tetrahedral amorphous carbon coatings deposited by filtered cathodic vacuum arc deposition

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Friction 2021年第5期9卷 1292-1302页

作者： Young-jun JANG Jae-Il kim WooYoung LEE Jongkuk kim Department of Extreme Environmental Coatings Surface Technology DivisionKorea Institute of Materials Science(KIMS)Gyeongnam-do 51508Republic of Korea Department of Mechanical Science and Engineering Graduate School of EngineeringNagoya UniversityNagoya 464-8603Japan

Tetrahedral amorphous carbon(ta‐C)has emerged as an excellent coating material for improving the reliability of application components under high normal ***,we present the results of our investigations regarding the mechanical and tribological properties of a 2‐μm‐thick multilayer ta‐C coating on high‐speed steel *** composed of alternating soft and hard layers are fabricated using filtered a cathodic vacuum arc with alternating substrate bias voltages(0 and 100 V or 0 and 150 V).The thickness ratio is discovered to be 1:3 for the sp2‐rich and sp3‐rich *** results show that the hardness and elastic modulus of the multilayer ta‐C coatings increase with the sp3 content of the hard *** hardness reached approximately 37 GPa,whereas an improved toughness and a higher adhesion strength(>29 N)are *** friction performance(μ=0.07)of the multilayer coating is similar to that of the single layer ta‐C thick coating,but the wear rate(0.13×10^(–6) mm^(3)/(N∙m))improved under a high load of 30 *** further demonstrate the importance of the multilayer structure in suppressing crack propagation and increasing the resistance to plastic deformation(H3/E2)ratio.

关键词： tetrahedral amorphous carbon(ta‐C) filtered cathodic vacuum arc deposition multilayer coatings alternating substrate bias voltage wear resistance plastic deformation resistance

LiTFSI salt concentration effect to digest lithium polysulﬁdes for high-loading sulfur electrodes

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Journal of Energy Chemistry 2023年第3期78卷 574-581,I0015页

作者： Jin-Kwang Song Moonsoo kim Seongbae Park Young-jun kim SKKU Advanced Institute of Nano Technology(SAINT) Sungkyunkwan UniversitySuwon 16419Republic of Korea Department of Nano Engineering Sungkyunkwan UniversitySuwon 16419Republic of Korea

Sulfur utilization improvement and control of dissolved lithium polysulﬁde(LiPS;Li_(2)S x,2 详细信息

Sulfur utilization improvement and control of dissolved lithium polysulﬁde(LiPS;Li_(2)S x,2

关键词： Lithium-sulfur battery Electrolyte concentration Li2S deposition High-loading sulfur electrode

Conditional survival in patients with gallbladder cancer

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Chinese Journal of Cancer 2017年第12期36卷 744-756页

作者： Yi-jun kim Kyubo kim Department of Radiation Oncology Ewha Womans University College of Medicine1071 Anyangcheon.roYangcheon.guSeoul 07985Republic of Korea

Background: Conditional survival(CS) has been established as a clinically relevant prognostic factor for cancer survivors, and the CS in gallbladder(GB) cancer has not yet been fully evaluated. In this study, we evaluated the cancerspecific CS rate and cancer-specific survival(CSS) rate in patients with GB cancer at multiple time points and investigated prognostic factors which affect cancer-specific CS rate to provide more accurate survival ***: Between 2004 and 2013, a total of 9760 patients with GB cancer were identified from the Surveillance,Epidemiology, and End Results(SEER) data. The 3-year cancer-specific CS rate was calculated using the covariateadjusted survival function in the Cox model for each year since diagnosis, and the results were analyzed together with the adjusted CSS rates at the same time points. Cox proportional hazards regression was performed to ascertain the individual contribution of factors associated with CSS rate at diagnosis and cancer-specific CS rates at 1,3, and 5 years after ***: The adjusted 5-year CSS rate was 26.1 %. The adjusted 3-year cancer-specific CS rates at 1,2,3,4, and 5 years after diagnosis were 55.5,72.2,81.5,86.8, and 90.5%, respectively. At the time of diagnosis, age, race, histology, grade,T, N, and M categories, surgery, radiotherapy, insurance status, and marriage status were significant prognostic factors of CSS. Five years after diagnosis, however,T and M categories were significant prognostic factors for survivors(P = 0.007 and P = 0.009, respectively), whereas surgery and radiotherapy were ***: T and M categories were significant prognostic factors even 5 years after the initial diagnosis, whereas local treatments at the time of diagnosis were not, suggesting that patients with GB cancer at high risks might need further adjuvant therapy after primary treatments. The combined analysis of CSS and cancer-specific CS rates offered more accurate survival information for pa

关键词： Gallbladder cancer Conditional survival SEER

Data-aided efficient synchronization for UWB signals based on minimum average error probability

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The Journal of China Universities of Posts and Telecommunications 2008年第1期15卷 6-10页

作者： sun Qiang LU Tie-jun School of Information Engineering Beijing University of Posts and Telecommunications Beijing 100876 China

One of the biggest challenges in ultra-wideband （UWB） radio is the accurate timing acquisition for the receiver. In this article, we develop a novel data-aided synchronization algorithm for pulses amplitude modulation （PAM） UWB systems Pilot and information symbols are transmitted simultaneously by an orthogonal code division multiplexing （OCDM） scheme. In the receiver, an algorithm based on the minimum average error probability （MAEP） of coherent detector is applied to estimate the timing offset. The multipath interference （MI） problem for timing offset estimation is considered. The mean-square-error （MSE） and the bit-error-rate（BER） performances of our proposed scheme are simulated. The results show that our algorithm outperforms the algorithm based on the maximum correlator output （MCO） in multipath channels.

关键词： timing offset estimation synchronization UWB,OCDM MAEP

Purification and Trypsin Inhibitor Activity of a Sporamin B from Sweet Potato (Ipomoea batatas Lam. 55-2)

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Agricultural Sciences in China 2009年第7期8卷 808-820页

作者： sun Yan-li sun jun-mao LI Qing-peng Institute of Agro-Food Science ＆ Technology Chinese Academy of Agricultural Sciences/Key Laboratory of Agricultural Product Processing and Quality Control Ministry of Agriculture Beijing 100193 P.R.China Agricultural Information Institute Chinese Academy of Agricultural Sciences Beijing 100081 P.R.China

Sporamin is a soluble protein in sweet potato, and falls into two distinct homology groups, subfamilies A and B. In this research, a sporamin B was purified and its amino acid sequences, trypsin inhibitor activity （Ti activity） were analyzed. This sporamin B was isolated from sweet potato tubers [Ipomoea batatas （L.） Lam cv. 55-2] through extraction of the water-soluble fraction, dialysis, ultrafiltration and ion-exchange chromatography. Homology determined by polyacrylamide gel electrophoresis showed that mainly one bond appeared in gel after being reduced by SDS （sodium dodecyl sulfate）, or by SDS and 2-mercaptoethanol, or in native situation. By comparing the data of the polypeptide mass Matrix-assisted laser desorption/ionization time-of-flight （MALDI-TOF） mass spectrometry with those of the mass of the theoretical amino acid sequences from NCBI protein database, it was revealed that it was Q40091｜Q40091_IPOBA, sweet potato sporamin B - Ipomoea Batatas （sweet potato）（Batate）. The sequence coverage was 70.6%. N-terminal sequence was SETPV （Ser-Glu-Thr-Pro-Val）. There is a linear relationship between trypsin inhibitor activity （Ti activity） and amounts of this sporamin B （3-18 μg mL-1）. The equation of linear regression was y = 2.5809x ＋ 17.049 （r2 = 0.9966）. There was a curvilinear relationship between Ti activity and amounts of this sporamin B （21-150 μg mL-1）. The equation of curvilinear regression is y = 14.417ln（x）＋ 23.26 （r2 = 0.9924）. The concentration of sporamin B with Ti activity after heating at 40°C may induce part denature of this sporamin B, and there was no statistic difference after heating at 40, 50, 60°C for 20 min. Heat treatment at more than 90°C leads to a dramatic decrease of trypsin inhibitor efficiency. The results suggested that Q40091｜Q40091_IPOBA was the major sporamin B in sweet potato tubers [Ipomoea Batatas （L.） Lam cv. 55-2], which had strong Ti activity, and was stable to both thermal and DTT （DL-dithiothreitol） relatively.

关键词： sweet potato sporamin B identification trypsin inhibitor activity

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椭圆节流小孔对空气静压轴承承载能力的影响

轴承 2025年第1期 39-45页

作者：孙国梁隆强刘华峰向俊谭畅四川航天烽火伺服控制技术有限公司成都611130

常规形状节流小孔在提高轴承性能时存在瓶颈,采用椭圆节流小孔能够更精确地控制气膜的流动和压力分布。为了计算椭圆节流小孔对空气静压轴承承载力的影响,通过引入椭圆小孔特性的扰动项对传统雷诺方程进行修正;为了避免不确定性和随机... 详细信息

常规形状节流小孔在提高轴承性能时存在瓶颈,采用椭圆节流小孔能够更精确地控制气膜的流动和压力分布。为了计算椭圆节流小孔对空气静压轴承承载力的影响,通过引入椭圆小孔特性的扰动项对传统雷诺方程进行修正;为了避免不确定性和随机因素导致的复杂计算问题,建立一种基于高斯分布的轴承承载力统计预测模型,实现了对椭圆小孔特征参数影响轴承承载力机制的分析;最后利用粒子群优化算法实现承载力与特征参数之间的最佳平衡。算例验证结果表明,长短轴比为0.8、小孔数量为20、小孔气道深度为9 mm的参数组合下的轴承承载力最优,约840 N。

关键词：滑动轴承气体静压轴承节流孔承载力粒子群优化算法

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Submergence promotes auxin-induced callus formation through ethylene-mediated post-transcriptional control of auxin receptors

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Molecular Plant 2022年第12期15卷 1947-1961页

作者： Seung Yong Shin Yuri Choi Sang-Gyu kim Su-Jin Park Ji-sun Park Ki-Beom Moon Hyun-Soon kim Jae Heung Jeon Hye sun Cho Hyo-jun Lee Plant Systems Engineering Research Center Korea Research Institute of Bioscience and BiotechnologyDaejeon 34141Korea Department of Functional Genomics KRIBB School of BioscienceUniversity of Science and TechnologyDaejeon 34113Korea Department of Biological Sciences Korea Advanced Institute of Science and TechnologyDaejeon 34141Korea Department of Biosystems and Bioengineering KRIBB School of BiotechnologyUniversity of Science and TechnologyDaejeon 34113Korea Department of Biological Sciences Sungkyunkwan UniversitySuwon 16419Korea

Plant cells in damaged tissue can be reprogrammed to acquire pluripotency and induce callus ***,in the aboveground organs of many species,somatic cells that are distal to the wound site become less sensitive to auxin-induced callus formation,suggesting the existence of repressive regulatory mechanisms that are largely *** we reveal that submergence-induced ethylene signals promote callus formation by releasing post-transcriptional silencing of auxin receptor transcripts in non-wounded *** determined that short-term submergence of intact seedlings induces auxin-mediated cell dedifferentiation across the entirety of Arabidopsis thaliana *** constitutive triple response 1-1(ctr1-1)mutation induced callus formation in explants without submergence,suggesting that ethylene facilitates cell *** show that ETHYLENE-INSENSITIVE 2(EIN2)post-transcriptionally regulates the abundance of transcripts for auxin receptor genes by facilitating microRNA393 ***-induced calli in non-wounded regions were suitable for shoot regeneration,similar to those near the wound *** also observed submergence-promoted callus formation in Chinese cabbage(Brassica rapa),indicating that this may be a conserved mechanism in other *** study identifies previously unknown regulatory mechanisms by which ethylene promotes cell dedifferentiation and provides a new approach for boosting callus induction efficiency in shoot explants.

关键词： cell dedifferentiation auxin signaling ethylene callus formation EIN2

Acute myeloid leukemia with t(11;19)(q23;p13.1) in a patient with a gastrointestinal stromal tumor undergoing imatinib therapy:A case report

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World Journal of Clinical Cases 2020年第7期8卷 1251-1256页

作者： Hong jun kim sun Kyung Baek Chi Hoon Maeng Si-Young kim Tae sung Park Jae Joon Han Department of Hematology and Medical Oncology Kyung Hee UniversitySeoul 02447South Korea Department of Laboratory Medicine Kyung Hee UniversitySeoul 02447South Korea

BACKGROUND Acute myeloid leukemia(AML)harboring 11q23 translocations is classified as therapy-related AML in patients who have undergone prior treatment with cytotoxic *** have been only a few reports of AML that subsequently developed during imatinib mesylate(IM)treatment for gastrointestinal stromal tumors(GISTs).CASE SUMMARY A 63-year-old woman was diagnosed with a hepatic GIST recurrence in April 2012;she was administered IM 400 mg/*** November 2015,she developed dyspnea with pancytopenia while IM treatment was continued for 42 mo.A chromosome study using a bone marrow sample showed a 46,XX karyotype with t(11;19)(q23;p13.1)in 22 of 26 analyzed metaphase *** in situ hybridization using the locus-specific indicator(11q23)gene break-apart probe showed positive rearrangement in 82%of interphase ***-transcription polymerase chain reactions subsequently confirmed the KMT2A/ELL *** achieved complete response with incomplete neutrophil recovery with two decitabine treatment *** the third cycle of decitabine,the disease relapsed,and she refused further *** died of hemorrhagic stroke 5 mo after *** the best of our knowledge,this is the first report of AML with KMT2A gene rearrangements in a patient with a GIST receiving IM *** Physicians should consider the potential risks of developing hematologic malignancies,including therapy-related AML,in patients with GISTs receiving IM treatment.

关键词： Acute myeloid leukemia Gastrointestinal stromal tumor Imatinib KMT2A Myelodysplastic syndrome Case report

Short-term interval combined chemoembolization and radiofrequency ablation for hepatocellular carcinoma

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World Journal of Gastroenterology 2014年第35期20卷 12588-12594页

作者： Won Hyeok Choe Young jun kim Hee sun Park Sang Woo Park Jeong Han kim So Young Kwon Department of Internal Medicine Konkuk University School of Medicine Department of Radiology Konkuk University School of Medicine

AIM: To investigate hepatic function after combined transcatheter arterial chemoembolization (TACE) and radiofrequency ablation (RFA) with a short-term interval (0-2 d).

关键词： Child-Pugh score Liver cirrhosis Hepatocellular carcinoma Transcatheter arterial chemoembolization Radiofrequency ablation