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含形状记忆合金支撑的框架结构的动力特性

上海交通大学学报 2006年第8期40卷 1376-1380页

作者：孙双双 r.k.n.d.rajapakse 姜先策孙国钧青岛科技大学机电工程学院青岛266061 不列颠哥伦比亚大学机械工程系海军航空工程学院青岛分院航空机械系青岛266041 上海交通大学船舶海洋与建筑工程学院上海200030

利用有限元法分析了谐激励下含形状记忆合金(SMA)支撑的框架结构的位移响应和频谱特性,并从SMA的初始预应变、激振力力幅和操作温度3个方面讨论了SMA的伪弹阻尼特性对结构位移响应的影响.结果表明,伪弹性SMA能够比较有效地抑制结构振动.

关键词：形状记忆合金伪弹性框架结构动力特性

nucleoside modified mrnA-lipid nanoparticles as a new delivery platform for the repair of the injured spinal cord

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neural regeneration research 2025年第8期20卷 2311-2312页

作者： krisztián Pajer Tamás Bellák Antal nógrádi department of Anatomy Histology and EmbryologyAlbert Szent-Györgyi Medical SchoolUniversity of SzegedSzegedHungary

Spinal cord injury and treatment opportunities:The adult mammalian spinal cord has a very limited capacity for spontaneous regeneration due to various intrinsic molecular and cellular *** the spinal cord neurons have the capacity to regenerate their axons,the expression of growth inhibitory factors,lack or suppression of proper guidance cues,and profound inflammatory responses do not permit successful regeneration(khyeam et al.,2021).

关键词： injured capacity modified

diabetic peripheral neuropathy and neuromodulation techniques:a systematic review of progress and prospects

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neural regeneration research 2025年第8期20卷 2218-2230页

作者： rahul Mittal keelin Mckenna Grant keith Evan Mckenna Joana r.n.Lemos Jeenu Mittal khemraj Hirani diabetes research Institute University of Miami Miller School of MedicineMiamiFLUSA department of Otolaryngology University of Miami Miller School of MedicineMiamiFLUSA Herbert Wertheim College of Medicine Florida International UniversityMiamiFLUSA School of Medicine and Public Health University of WisconsinMadisonWIUSA

neuromodulation for diabetic peripheral neuropathy represents a significant area of interest in the management of chronic pain associated with this *** peripheral neuropathy,a common complication of diabetes,is characterized by nerve damage due to high blood sugar levels that lead to symptoms,such as pain,tingling,and numbness,primarily in the hands and *** aim of this systematic review was to evaluate the efficacy of neuromodulatory techniques as potential therapeutic interventions for patients with diabetic peripheral neuropathy,while also examining recent developments in this *** investigation encompassed an array of neuromodulation methods,including frequency rhythmic electrical modulated systems,dorsal root ganglion stimulation,and spinal cord *** systematic review suggests that neuromodulatory techniques may be useful in the treatment of diabetic peripheral *** the advantages of these treatments will enable physicians and other healthcare providers to offer additional options for patients with symptoms refractory to standard pharmacologic *** these efforts,we may improve quality of life and increase functional capacity in patients suffering from complications related to diabetic neuropathy.

关键词： diabetes mellitus diabetic peripheral neuropathy neuromodulation neurostimulation therapy non-pharmacological treatment pain management

Application of new directional logic to improve dC side fault discrimination for high resistance faults in HVdC grids

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Journal of Modern Power Systems and Clean Energy 2017年第4期5卷 560-573页

作者： naushath M.HALEEM Athula d.rajapakse University of Manitoba Winnipeg MB Canada

This paper proposes a simple and fast way to determine the direction of a fault in a multi-terminal high voltage direct current(HVdC) grid by comparing the rate of change of voltage(rOCOV) values at either side of the di/dt limiting inductors at the line terminals. A local measurement based secure and fast protection method is implemented by supervising a basic rOCOV relay with a directional element. This directional information is also used to develop a slower communication based dC line protection scheme for detecting high resistance faults. The proposed protection scheme is applied to a multi-level modular converter based three-terminal HVdC grid and its security and sensitivity are evaluated through electromagnetic transient simulations. A methodology to set the protection thresholds considering the constraints imposed by the breaker technology and communication delays is also presented. With properly designed di/dt limiting inductors,the ability of clearing any dC transmission system fault before fault currents exceeds a given breaker capacity is demonstrated.

关键词： directional relay dC line protection Multiterminal HVdC grid protection rate of change of voltage(rOCOV)based HVdC transmission fault detection

Health anxiety and work loss in patients diagnosed with serrated polyposis syndrome:A cross sectional study

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World Journal of Clinical Oncology 2025年第2期16卷 52-62页

作者： Angus Thompson natalie r dierick Louise Heiniger Stuart n kostalas School of Clinical Medicine University of New South WalesPort Macquarie 2444New South WalesAustralia department of Gastroenterology Port Macquarie GastroenterologyPort Macquarie 2444New South WalesAustralia

BACkGrOUnd Serrated polyposis syndrome(SPS)is a polyposis condition with neoplastic potential,but its psychological impact is not well *** To assess health anxiety prevalence in a regional Australian cohort of SPS patients and explore factors influencing it,including workforce impacts of regular *** This cross-sectional study screened patients aged 18-65 undergoing colonoscopy in a regional gastroenterology practice between January 2015 and June *** SPS patients were invited to *** included the Short Health Anxiety Inventory,employment status,and previous demographic and medical *** Health anxiety was found in 21.57%of SPS patients,with anxious patients being significantly more concerned about surveillance(Or=7.70).Patients lost an average of 11.04 work hours per *** Health anxiety in SPS patients aligns with rates in other gastroenterology *** it may improve management,though further research is needed to better understand prevalence and care improvements.

关键词： Serrated polyposis syndrome Health anxiety Colorectal cancer Surveillance

The sexually dimorphic expression of glutamate transporters and their implication in pain after spinal cord injury

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neural regeneration research 2025年第11期20卷 3317-3329页

作者： Jennifer M.Colón-Mercado Aranza I.Torrado-Tapias Iris k.Salgado Jose M.Santiago Samuel E.Ocasio rivera dina P.Bracho-rincon Luis H.Pagan rivera Jorge d.Miranda department of Physiology University of Puerto RicoMedical Sciences CampusSan JuanPRUSA national Institutes of Health National Human Genome Research InstituteBethesdaMDUSA Universidad Central del Caribe School of MedicineBayamónPRUSA University of Puerto rico Carolina CampusCarolinaPRUSA Institute of neurobiology San JuanPRUSA

In addition to the loss of motor function,~60% of patients develop pain after spinal cord *** cellular-molecular mechanisms are not well understood,but the data suggests that plasticity within the rostral,epicenter,and caudal penumbra of the injury site initiates a cellularmolecular interplay that acts as a rewiring mechanism leading to central neuropathic *** can lead to the formation of new connections triggering abnormal sensory *** excitatory glutamate transporters are responsible for the reuptake of extracellular glutamate which makes them a critical target to prevent neuronal hyperexcitability and *** previous studies showed a sexually dimorphic therapeutic window for spinal cord injury after treatment with the selective estrogen receptor modulator *** this study,we investigated the anti-allodynic effects of tamoxifen in male and female rats with spinal cord *** hypothesized that tamoxifen exerts anti-allodynic effects by increasing the expression of glutamate transporters,leading to reduced hyperexcitability of the secondary neuron or by decreasing aberrant *** and female rats received a moderate contusion to the thoracic spinal cord followed by subcutaneous slow-release treatment of tamoxifen or matrix pellets as a control(placebo).We used von Frey monofilaments and the“up-down method”to evaluate mechanical *** treatment decreased allodynia only in female rats with spinal cord injury revealing a sexdependent *** expression profile of glutamatergic transporters(excitatory amino acid transporter 1/glutamate aspartate transporter and excitatory amino acid transporter 2/glutamate transporter-1)revealed a sexual dimorphism in the rostral,epicenter,and caudal areas of the spinal cord with a pattern of expression primarily on *** rodents showed a significantly higher level of excitatory amino acid transporter-1 expression while male rodents showed increased

关键词： allodynia central neuropathic pain EAAT-1/GLAST EAAT-2/GLT-1 glutamate transporters selective estrogen receptor modulator sexual dimorphism spinal cord injury trauma

Efficient dye-sensitized solar cells from mesoporous zinc oxide nanostructures sensitized by n719 dye

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Journal of Semiconductors 2018年第3期39卷 25-30页

作者： G.r.A.kumara U.deshapriya C.S.k.ranasinghe E.n.Jayaweera r.M.G.rajapakse national Institute of Fundamental Studies Hantana RoadKandy20000Sri Lanka Postgraduate Institute of Science University of PeradeniyaPeradeniya20400Sri Lanka derpatment of Chemistry Faculty of ScienceUniversity of PeradeniyaPeradeniya20400Sri Lanka

dye-sensitized solar cells（dSCs） have attracted a great deal of attention due to their low-cost and high power conversion efficiencies. They usually utilize an interconnected nanoparticle layer of TiO2 as the electron transport medium. From the fundamental point of view, faster mobility of electrons in Zn O is expected to contribute to better performance in dSCs than TiO2, though the actual practical situation is quite the opposite. In this research, we addressed this problem by first applying a dense layer of Zn O on FTO followed by a mesoporous layer of interconnected Zn O nanoparticle layer, both were prepared by spray pyrolysis technique. The best cell shows a power conversion efficiency of 5.2% when the mesoporous layer thickness is 14 μm and the concentration of the n719 dye in dye coating solution is 0.3 m M, while a cell without a dense layer shows 4.2% under identical conditions. The surface concentration of dye adsorbed in the cell with a dense layer and that without a dense layer are5.00 × 10^（-7） and 3.34 × 10^（-7） mol/cm^2, respectively. The cell with the dense layer has an electron lifetime of-54.81 ms whereas that without the dense layer is 11.08 ms. As such, the presence of the dense layer improves dSC characteristics of Zn O-based dSCs.

关键词： dye-sensitized solar cell mesoporous ZnO layer ZnO dense layer dSC characteristics

Chyle leak following root of mesentery dissection in pancreaticoduodenectomy with inferior infracolic superior mesenteric artery first approach

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World Journal of Clinical Cases 2025年第8期13卷 8-14页

作者： Prabir Maharjan Sujan regmee Spandan d Adhikari rabin Pahari roshan Ghimire dhiresh k Maharjan Suman k Shrestha Prabin B Thapa department of Gastrointestinal and General Surgery Kathmandu Medical College and Teaching HospitalKathmandu 44600Nepal

BACkGrOUnd The root of mesentery dissection is one of the critical maneuvers,especially in borderline resectable pancreatic head ***-abdominal chyle leak(CL)including chylous ascites may ensue in up to 10%of patients after pancreatic *** recognized superior mesenteric artery(SMA)first approaches are invariably *** mesenteric dissection through the inferior infracolic approach has been discussed in this study emphasizing its post-operative impact on CL which is the cornerstone of this *** To assess incidence,risk factors,clinical impact of CL following root of mesentery dissection,and the different treatment *** This is a retrospective study incorporating the patients who underwent dissection of the root of mesentery with inferior infracolic SMA first approach pancreat-oduodenectomy for the ventral body and uncinate mass of pancreas in the department of Gastrointestinal and General Surgery of kathmandu Medical College and Teaching Hospital from January 1,2021 to February 28,***-erative findings and postoperative outcomes were *** In three years,ten patients underwent root of mesentery dissection with inferior infracolic SMA first approach *** mean age was 67.6 years with a male-to-female ratio of 4:*** was seen in four *** virtue of CL,Clavien-dindo grade Ⅱ or higher morbidity was observed in four *** patients had a hospital stay of more than 20 days with the former having a delayed gastric emptying and the latter with long-term total parenteral nutrition *** mean operative time was 330 *** resection was achieved in 100%of the *** mean duration of the intensive care unit and hospital stay were 2.55±1.45 days and 15.7±5.32 days,*** root of mesentery dissection with lymphadenectomy and vascular resection correlated with occurrence of *** complete curative resection,these were managed with tota

关键词： Chyle leak Chylous ascites Clavien-dindo Pancreatoduodenectomy root of mesentery dissection Superior mesenteric artery first approach Total parenteral nutrition Uncinate mass Vascular resection Ventral body mass

Optimisation of zeolite LTA synthesis from alum sludge and the influence of the sludge source

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Journal of Environmental Sciences 2021年第1期33卷 130-142页

作者： Alexandra rozhkovskaya Jay rajapakse Graeme J.Millar School of Civil and Enuironmental Engineering Science and Engineering FacultyQueensland University oTechnologyBrisbaneQueensland 4000Australia Institute for Future Environments and School of Mechanical Medical and Process EngineeringQueensland Uniuersity of TechnologyBrisbaneQueensland 4000Australia

Generation of alum sludge(AS)at drinking water treatment plants represents an environmental liability and adds to the cost of water ***,this study explored the feasibility of using low and high carbon containing alum sludge from two water treatment plants to synthesize zeolite *** hypothesis was that zeolite LTA synthesis was dependant upon alum sludge source and that a range of strategies may be required to optimize zeolite *** characteristics such as morphology,phase composition,crystallinity,and particle size distribution were recorded."One pot"hydrothermal synthesis of precursor gel with molar composition 4.2 na2O:Al2O3:1.2 SiO_(2):168 H2O at 80℃ for 3 hr resulted in 25 and 46 wt.%zeolite LTA from high and low carbonaceous sludge,*** to hydrothermal reaction stage it was discovered that ageing of the gel,addition of zeolite LTA seeds,ultrasonic treatment and calcination all promoted zeolite LTA *** of the alum sludge at 700℃ for 2 hr before hydrothermal synthesis resulted in particle size reduction and the highest amount of crystalline zeolite LTA:79 wt.%from low carbon sludge and 65 wt.%from high carbon ***,the zeolite crystallinity reported in this study was the higher than previous studies on this *** outlined approach may allow value adding of alum waste and produce a commodity which could be used locally by the water treatment plant as a water softener.

关键词： Alum sludge Zeolite LTA Ultrasonic Ageing Waste conversion