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Design concept development of a variable magnetization motorwith improved efficiency and controllable stiffness for roboticapplications

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Science China(Technological Sciences) 2019年第1期62卷 39-46页

作者： BAI Kun ZHU Lang YUAN mi lee Kok-Meng State Key Lab of Digital Manufacturing Equipment and Technology Huazhong University of Science and Technology Woodruff School of Mechanical Engineering Georgia Institute of Technology

A variable magnetization(VM) motor by incorporating magnets that can be flexibly configured with variable magnetization process is proposed to meet the emerging requirements on motor efficiency and actuator compliance in robotic applications. A generalized spin torque model is established which provides a relationship between the motor torque and two different types of motor inputs, the current inputs and the magnet magnetizations. Avariable magnetization process is proposed based on the study of the hysteresis properties of the magnetic materials and the design criteria for implementing the variable magnetization process with current pulses are established. The feasibility of the variable magnetization is validated with experimental data and the motor functions and performances are numerically demonstrated and evaluated. The results show that the VM motor can maintain high efficiency by switching between two actuation modes. Controllable stiffness at different equilibria can be also achieved with the VM motor with instantaneous magnetizing current pulses.

关键词： compliant actuators direct-drive motors variable stiffness motors variable magnetization motors

Apigenin ameliorates diabetic neuropathy in rats by modulating the TLR4/MyD88 signaling pathway

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Asian Pacific Journal of Tropical Biomedicine 2023年第11期13卷 469-478,I0003,I0004,I0005,I0006,I0008页

作者： Yan-bo Yu mi-Zhen Qiu Da-Ying Zhang Department of Pain The First Affiliated Hospital of Nanchang UniversityNanchang 330006China

Objective:To determine the neuroprotective effects of apigenin against streptozotocin(STZ)-induced diabetic neuropathy(DN).Methods:To induce DN,Wistar rats(150-200 g)were administered with STZ(55 mg/kg,i.p.).Then they were randomly assigned to various groups,viz.,normal,diabetic control,insulin(10 IU/kg,s.c.),apigenin(5,10,and 20 mg/kg,p.o.),and insulin(10 IU/kg)plus apigenin(20 mg/kg,p.o.).Various behavioral,biochemical,and molecular markers[tumor necrosis factor-alpha(TNF-α),interleukin(IL)-1β,IL-6,Toll-like receptor 4(TLR4),myeloid differentiation primary response 88(MyD88),and nuclear factor erythroid 2-related factor 2(Nrf2)]were ***:Apigenin(10 and 20 mg/kg,p.o.)substantially reduced plasma glucose levels,lipid profile,aspartate transaminase,alanine transaminase,glycated hemoglobin,and neural advanced glycation end products in STZ-induced DN rats(Pbody weight,urine output,allodynia,hyperalgesia,and insulin levels were markedly improved(Pminished following apigenin therapy(P<0.05).Furthermore,apigenin markedly upregulated the Nrf2 mRNA level while downregulating the mRNA expressions of TNF-αand ILs and the protein expressions of TLR4 and MyD88(P<0.05).STZ-induced histological abnormalities in the sciatic nerve were also improved by apigenin ***:Apigenin exerts its neuroprotective effect by modulating the inflammatory and oxidative stress pathways via regulating the TLR4-MyD88 signaling pathway.

关键词： Apigenin Diabetic neuropathy MyD88 Nrf2 Proinflammatory cytokines TLR4

Prostate only radiotherapy using external beam radiotherapy:A clinician’s perspective

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World Journal of Clinical Cases 2022年第29期10卷 10428-10434页

作者： Jeong Won lee mi Joo Chung Department of Radiation Oncology Daegu Catholic University School of MedicineDaegu 42472South Korea Department of Radiation Oncology Hanyang University Hanmaeum Changwon HospitalChangwon 51139South Korea

Prostate-only radiotherapy(PORT) is widely used as the definitive treatment for localized prostate *** cancer has an α/β ratio;therefore,radiotherapy(RT) with a large fraction size is biologically effective for tumor *** current external beam RT technique for PORT has been improved from threedimensional conformal RT to intensity-modulated,stereotactic body,and imageguided *** methods are associated with reduced radiation exposure to normal tissues,decreasing urinary and bowel *** trials have shown improved local control with dose escalation through the aforementioned methods,and the efficacy and safety of intensity-modulated and stereotactic body RTs have been ***,the management of RT in patients with prostate cancer has not been fully *** a clinician,there are several concerns regarding the RT volume and dose considering the patient’s age and ***,this review aimed to discuss the radiobiological basis and external beam technical advancements in PORT for localized prostate cancer from a clinician’s perspective.

关键词： Prostate cancer Radiotherapy Radiation dose Radiation technique Radiation volume

Hybrid windshield-glass heater for commercial vehicles fabricated via enhanced electrostatic interactions among a substrate, silver nanowires, and an over-coating layer

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Nano Research 2015年第6期8卷 1882-1892页

作者： Sae mi lee Ji Hun lee Sora Bak Keunsik lee Yang Li Hyoyoung lee 2066 Seoburo Jangan-gu Center for Smart Molecular Memory Department of Chemistry Sungkyunkwan University Suwon 440-746 Republic of Korea 2066 Seoburo Jangan-gu Center for Smart Molecular Memory Department of Energy Science Sungkyunkwan University Suwon 440-746 Republic of Korea 2066 Seoburo Jangan-gu Center for Smart Molecular Memory SKKU Advanced Institute of Nano Technology (SAINT) Sungkyunkwan University Suwon 440-746 Republic of Korea

We introduce a transparent windshield-glass heater produced via transparent electrodes using silver nanowire （AgNW） networks for conventional use in the automobile industry. A high-quality conducting hybrid film is deposited on a plasma-treated glass substrate by spraying AgNWs, immersing the sprayed product in positively charged adhesive polymer solution, and then spraying negatively charged graphene oxide （GO） and a silane layer as an over-coating layer （OCL）.The results of heating tests conducted after adhesion tests show that the sheet resistance changes with the application of polymer glue. Surprisingly, the transmittance of the film with the GO OCL is higher than that of the film without the GO OCL. Heating and defrosting tests are carefully conducted via infrared （IR） monitoring. Adhesive-polymer-treated and GO-protected AgNW transparent glass heaters exhibit the best performance with low sheet resistance; thus, through strong electrostatic interaction among the substrate, adhesive layer, and OCL, our AgNW hybrid glass heater can reach the target temperature with a standard vehicle voltage of 12 V in a short period of time.

关键词： transparentwindshield-glass heater silver nanowires heating glass adhesive polymers material science

Paraaortic lymph node metastasis in patients with intra-abdominal malignancies:CT vs PET

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World Journal of Gastroenterology 2009年第35期15卷 4434-4438页

作者： mi-Jung lee mi Jin Yun mi-Suk Park Seung Hwan Cha Myeong-Jin Kim Jong Doo lee Ki Whang Kim Department of Diagnostic Radiology Research Institute of Radiological Science and Institute ofGastroenterology Yonsei University College of Medicine 134Sincheon-Dong Seodaemun-Gu Seoul 120-752 South Korea Department of Nuclear medicine Yonsei University College of Medicine 134 Sincheon-Dong Seodaemun-Gu Seoul 120-752 South Korea Department of Diagnostic Radiology Yonsei University Wonju College of Medicine Wonju 220-701South Korea

AIM： To compare the diagnostic accuracy of computed tomography （CT） and positron emission tomography （PET） for the preoperative detection of paraaortic lymph node （PAN） metastasis in patients with intra- abdominal malignancies. METHODS： Sixty-six patients with intra-abdominal malignancies who underwent both CT and PET before lymphadenectomy were included in this study. Histopathologicaliy, 13 patients had metastatic PAN, while 53 had non-metastatic PAN. The CT criteria for metastasis were： short diameter ：）f 〉 8 mm, Iobular or irregular shape, and/or combined ancillary findings, including necrosis, conglomeration, vessel encasement, and infiltration. The PET criterion was positive fluorodeoxyglucose （FDG） uptake. The sensitivity, specificity, positive predictive value （PPV）, negative predictive value （NPV）, and accuracy of both modalities were compared with the pathologic findings, and the false positive and false negative cases with both CT and PET were ***： The sensitivity, specificity, PPV, NPV, and accuracy of CT were 61.5%, 84.9%, 50%, 90% and 80.3%, respectively. For PET, the percentages were 46.2%, 100%, 100%, 88.3%, and 89.4%. Additionally, there were 8 false positive CT cases （8/53, 15.1%） and zero false positive PET cases. Of the 13 metastatic PANs, there were 5 false negative CT scans （38.5%） and 7 （53.9%） false negative PET ***： For detecting PAN metastasis, CT is more sensitive than PET, while PET is more specific.

关键词： Malignancy Paraaortic lymph node Computed tomography Positron emission tomography Sensitivity Specificity

Crown Fuel Characteristics and Carbon Emission from Japanese Red Pine Stands Burned by Crown Fire in Mt. Palgong, South Korea

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Journal of Mountain Science 2012年第5期9卷 656-664页

作者： Byungdoo lee Myoung Soo WON Yohan lee Myung bo lee Division of Forest Disaster Management Korea Forest Research Institute College of Forestry Oregon State University

Carbon emissions from forest fires are considered an important factor of ecosystem carbon balance and global climate change. Carbon emissions from Japanese red pine stands （Pinus densiflora S. et Z.） burned by crown fire were estimated at Mt. Palgong in Daegu Metropolitan City, and crown fuel characteristics, including crown bulk density, crown base height, and fuel moisture content of Japanese red pine, were analyzed. Total biomass combusted was calculated by subtracting the biomass of burned stands from that of unburned stands exhibiting similar stand structures and site environments. Ten trees in the unburned area and five trees in the burned area were cut by using direct harvesting techniques to estimate crown layer biomass. All biomass sampled was oven-dried and weighed. The dry weight ratios of stems, branches, and needles were 7o%, 21%, and 9%, respectively. The available fuel load susceptible to combustion during the crown fire spread was equivalent to 55% of the crown layer biomass. The crown bulk density was 0.24 kg/m3 on average. The estimated amount of CO2 was 23,454 kg CO2/ha for the crown layer. These results will be useful for calculating the amount of CO2 emitted from forest fires and for developing a forest carbon model in P. densiflora forests.

关键词： Biomass burning Crown fire Fuelcharacteristics Bulk density Pinus densiflora

Incipient fault diagnosis on active disturbance rejection control

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Science China(Information Sciences) 2022年第9期65卷 301-302页

作者： Darong HUANG Xingxing HUA bo mi Yang LIU Zhenyuan ZHANG College of Information Science and Engineering Chongqing Jiaotong University College of Mathematical and Statistics Chongqing Jiaotong University

Dear editor,The incipient fault diagnosis method has received great attention in recent decades owing to the increasing demand for reliability and safety in industrial processes [1, 2]. A controller of active disturbance rejection control (ADRC)can effectively separate the incipient fault from the disturbance. Therefore, studying the incipient fault estimation has become a necessarily imminent research topic in this new frontier.

关键词： Active disturbance rejection control Fault diagnosis Disturbance abrupt incipient fault soft incipient fault

Genome-Wide Analysis and Molecular Characterization of Heat Shock Transcription Factor Family in Glycine max

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Journal of Genetics and Genomics 2013年第3期40卷 127-135页

作者： Eunsook Chung Kyoung-mi Kim Jai-Heon lee BK21 Center for Silver-Bio Industrialization College of Natural Resources and Life Science Dong-A University

Heat shock transcription factors （Hsfs） play an essential role on the increased tolerance against heat stress by regulating the expression of heat-responsive genes. In this study, a genome-wide analysis was performed to identify all of the soybean （Glycine max） GmHsfgenes based on the latest soybean genome sequence. Chromosomal location, protein domain, motif organization, and phylogenetic relationships of 26 non-redundant GmHsf genes were analyzed compared with AtHsfs （Arabidopsis thaliana Hsfs）. According to their structural features, the predicted members were divided into the previously defined classes A-C, as described for AtHsfs. Transcript levels and subcellular localization of five GmHsfs responsive to abiotic stresses were analyzed by real-time RT-PCR. These results provide a fundamental clue for understanding the complexity of the soybean GmHsfgene family and cloning the functional genes in future studies.

关键词： Abiotic stress Arabidopsis thaliana Expression patterns Glycine max Heat shock transcription factor Phylogenetic analysis

Tunable electronic structure and magnetic coupling in strained two-dimensional semiconductor MnPSe3

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Frontiers of physics 2018年第4期13卷 167-174页

作者： Qi Pei Xiao-Cha Wang Ji-Jun ZOU Wen-bo mi Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparation Technology School of Science Tianjin University Tianjin 300354 China School of Electrical and Electronic Engineering Tianjin University of Technology Tianjin 300384 China Key Laboratory for Green Chemical Technology of the ministry of Education School of Chemical Engineering and Technology Tianjin University Tianjin 300354 China

The electronic structures and magnetic properties of strained monolayer MnPSe3 are investigated sys- tematically via first-principles calculations. It is found that the magnetic ground state of monolayer MnPSe3 can be significantly affected by biaxial strain engineering, while the semiconducting char- acteristics are well-preserved. Owing to the sensitivity of the magnetic coupling towards structural deformation, a biaxial tensile strain of approximately 13% can lead to an antiferromagnetic （AFM）- ferromagnetic （FM） transition. The strain-dependent magnetic stability is mainly attributed to the competition of the direct AFM interaction and indirect FM superexchange interaction between the two nearest-neighbor Mn atoms. In addition, we find that FM MnPSe3 is an intrinsic half semiconductor with large spin exchange splitting in the conduction bands, which is crucial for the spin-polarized carrier injection and detection. The sensitive interdependence among the external stimuli, electronic structure, and magnetic coupling makes monolayer MnPSe3 a promising candidate for spintronics.

关键词： two-dimensional semiconductor MnPSe3 strain engineering electronic structure magnetic coupling