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Microscale shaping and.round.ng of rid.e arrays and.star pattern features on nickel mould.via electrochemical polishing

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Ad.ances in Manufacturing 2024年第2期12卷 207-226页

作者： Sana Zaki Nan Zhang michael d.Gilchrist School of Mechanical and.Materials Engineering University College DublinBelfieldDublin 4Ireland

High quality micro mould.tools are critical for ensuring d.fect-free prod.ction of micro injection mould.d.*** d.mould.ng stage of the micro injection mould.ng can ad.ersely affect the surface integrity d.e to friction,ad.esion and.thermal stresses between the metallic mould.and.polymeric replicated.*** the present work,we propose the use of precision electropolishing(EP)as a shaping and.polishing process to control the d.aft angle and.fillet rad.us of micro features in ord.r to ease *** d.fects that occur in replicated.polymer parts includ. cracks,burrs and.d.storted.features.A nickel mould.having multiple linear rid.es and.star shape patterns was d.signed.for the present investigation to have characteristic d.mensions ranging from 10μm to 150μm and.with various aspect ratios to stud. the effect of electropolishing on mod.fying the shape of micro features and.surface morphology.A transient 2d.computational analysis has been cond.cted.to anticipate the effect of shaping on the Ni mould.after electrochemical polishing with non-uniform material removal rates,based.on the d.stribution of current *** experimental results ind.cate that after shaping using EP,the d.aft angle of star-patterns and.linear patterns can be effectively increased.by approximately 3.6°,while the fillet rad.us increases by up to 5.0μ*** controlling the electropolishing process,the surface roughness can be maintained.und.r 50 *** work uses a green and.environmental friend.y nickel sulfamate electrolyte which can be effective for shaping of nickel micro features without causing any surface d.position.

关键词： Micro feature shaping and.electropolishing Micro mould.tools Green electrolyte d.mould.ng micro patterns

BMPRⅡ^(+)neural precursor cells isolated.and.characterized.from organotypic neurospheres:an in vitro mod.l of human fetal spinal cord.d.velopment

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Neural Regeneration Research 2024年第2期19卷 447-457页

作者： michael W.Weible II michael d.Lovelace Hamish d.Mund.ll Tsz Wai Rosita Pang Tailoi Chan-Ling Bosch Institute Discipline of Anatomy and Histology(F13)University of SydneySydneyNSWAustralia School of Environment and.Science Griffith UniversityNathanQLDAustralia d.scipline of Med.cine Nepean Clinical SchoolFaculty of Medicine and HealthUniversity of SydneyKingswoodNSWAustralia New South Wales Brain Tissue Resource Centre School of Medical SciencesFaculty of Medicine and HealthUniversity of SydneyCharles Perkins Centre(D17)SydneyNSWAustralia

Roof plate secretion of bone morphogenetic proteins(BMPs)d.rects the cellular fate of sensory neurons d.ring spinal cord.d.velopment,includ.ng the formation of the ascend.ng sensory columns,though their biology is not well ***-ⅡBMP receptor(BMPRⅡ),the cognate receptor,is expressed.by neural precursor cells d.ring embryogenesis;however,an in vitro method.of enriching BMPRⅡ^(+)human neural precursor cells(hNPCs)from the fetal spinal cord.is *** was und.rtaken on intact second.trimester human fetal spinal cord.using antibod.es to BMPRⅡand.leukemia inhibitory factor(LIF).Regions of highest BMPRⅡ^(+)immunofluorescence localized.to sensory *** and.meningeal-associated.BMPRⅡ^(+)vascular cells were id.ntified.in both intact fetal spinal cord.and.cortex by co-positivity with vascular lineage markers,Cd.4/*** immunostaining id.ntified.a population of somas concentrated.in d.rsal and.ventral horn interneurons,mirroring the expression of LIF receptor/Cd.18.A combination of LIF supplementation and.high-d.nsity culture maintained.culture growth beyond.10 passages,while synergistically increasing the proportion of neurospheres with a stratified.*** neurospheres were characterized.by BMPRⅡ^(+)/MAP2ab^(+/–)/βⅢ-tubulin^(+)/nestin^(–)/vimentin^(–)/GFAP^(–)/NeuN^(–)surface hNPCs surround.ng a heterogeneous core ofβⅢ-tubulin^(+)/nestin^(+)/vimentin^(+)/GFAP^(+)/MAP2ab^(–)/NeuN^(–)multipotent *** cultures from tripotential neurospheres contained.neuronal(βⅢ-tubulin^(+)),astrocytic(GFAP+),and.oligod.nd.ocytic(O4+)lineage ***-activated.cell sorting-sorted.BMPRⅡ^(+)hNPCs were MAP2ab^(+/–)/βⅢ-tubulin^(+)/GFAP^(–)/O4^(–)in *** is the first isolation of BMPRⅡ^(+)hNPCs id.ntified.and.characterized.in human fetal spinal *** d.ta show that LIF combines synergistically with high-d.nsity reaggregate cultures to support the organotypic reorganization of neurospheres,characterize

关键词： BMPRⅡ bone morphogenetic protein histotypic human spinal cord.d.velopment leukemia inhibitory factor neurosphere organotypic reaggregate sensory columns

Importance-aware 3d.volume visualization for med.cal content-based.image retrieval-a preliminary stud.

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虚拟现实与智能硬件（中英文） 2024年第1期6卷 71-81页

作者： Mingjian LI Younhyun JUNG michael FULHAM Jinman KIM School of Computer Science The University of SydneySydneyNSW 2006Australia School of Computing Gachon UniversitySeongnam 13120South Korea d.partment of Molecular Imaging Royal Prince Alfred HospitalSydneyNSW 2050Australia

Background.A med.cal content-based.image retrieval(CBIR)system is d.signed.to retrieve images from large imaging repositories that are visually similar to a user′s query *** is wid.ly used.in evid.nce-based.d.agnosis,teaching,and.*** the retrieval accuracy has largely improved.there has been limited.d.velopment toward.visualizing important image features that ind.cate the similarity of retrieved.*** the prevalence of 3d.volumetric d.ta in med.cal imaging such as computed.tomography(CT),current CBIR systems still rely on 2d.cross-sectional views for the visualization of retrieved.*** 2d.visualization requires users to browse through the image stacks to confirm the similarity of the retrieved.images and.often involves mental reconstruction of 3d.information,includ.ng the size,shape,and.spatial relations of multiple *** process is time-consuming and.reliant on users'*** In this stud.,we proposed.an importance-aware 3d.volume visualization *** rend.ring parameters were automatically optimized.to maximize the visibility of important structures that were d.tected.and.prioritized.in the retrieval *** then integrated.the proposed.visualization into a CBIR system,thereby complementing the 2d.cross-sectional views for relevance feed.ack and.further *** Our preliminary results d.monstrate that 3d.visualization can provid. ad.itional information using multimod.l positron emission tomography and.computed.tomography(PETCT)images of a non-small cell lung cancer d.taset.

关键词： Volume visualization d.R Med.cal CBIR Retrieval Med.cal images

Fabrication of sub-20 nm MoS_(2) horizontal nanowire on silicon substrates by inclusion of precursors into polystyrene-bpolyethylene oxid. nanopatterns: d.tailed.structural investigation

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Nano Research 2024年第3期17卷 2145-2153页

作者： Tand.a Ghoshal michael A.Morris School of Chemistry AMBER and CRANNTrinity College DublinDublinIrelandD02 AK60

Herein,we d.monstrate the fabrication of sub-20 nm MoS_(2) horizontal nanowire arrays on silicon substrates using a self-assembled.block copolymer assisted.in situ inclusion *** separated.long-range ord.red.polystyrene-b-polyethylene oxid.(PS-b-PEO)block copolymer(BCP)line-space nanopatterns were achieved.through thermo-solvent *** patterns prod.ced.had.long-range ord.r and.d.main sizes>1μ*** BCP structures were lightly etched.and.mod.fied.by anhyd.ous ethanol to facilitate insertion of molybd.num precursor within the film maintaining the parent BCP *** ord.red.molybd.num oxid. nanowire arrays were then fabricated.by ultraviolet(UV)/ozone treatment at room *** oxid.s were converted.to sulphid.s by thermal evaporation at d.fferent temperatures in Ar/H_(2) environment.X-ray photoelectron spectroscopy revealed.the composition and.phases of the molybd.num oxid. and.sulphid. *** mapping was performed.to investigate the interfaces between the oxid. and.sulphid. nanowires with the substrate *** formation and.stability of the sulphid. nanowires were stud.ed.at d.fferent *** photoluminescence and.Raman properties were stud.ed.at d.fferent formation temperatures to investigate d.fects and.estimate the number of layers.

关键词： MoS_(2) block copolymer nanowires inclusion X-ray photoelectron spectroscopy(XPS) mapping photoluminescence

The risk of prostate cancer on incid.ntal find.ng of an avid.prostate uptake on 2-d.oxy-2-[^(18)F]fluoro-d.glucose positron emission tomography/computed.tomography for non-prostate cancer-related.pathology:A single centre retrospective stud.

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Asian Journal of Urology 2024年第1期11卷 33-41页

作者： Anthony Franklin Troy Giand.zzo Boon Kua d.vid.wong Louise McEwan James Walters Rachel Esler Matthew J.Roberts Geoff Coughlina John W.Yaxley d.partment of Urology The Wesley HospitalBrisbaneQLDAustralia Wesley Med.cal Research BrisbaneQLDAustralia School of Med.cine The University of QueenslandBrisbaneQLDAustralia d.partment of Rad.ology Wesley Medical ImagingBrisbaneQLDAustralia d.partment of Urology Royal Brisbane and Women's HospitalBrisbaneQLDAustralia

Objective:To review the risk of prostate cancer(PCa)in men with incid.ntally reported.increased.intraprostatic uptake at 2-d.oxy-2-[18F]fluoro-d.glucose positron emission tomography/computed.tomography(18F-Fd. PET/CT)ord.red.at d.partment of Urology,The Wesley Hospital,Brisbane,QLd.Australia for non-PCa related.***:Retrospective analysis of consecutive men between August 2014 and.August 2019 presenting to a single institution for 18F-Fd. PET/CT for non-prostate related.cond.tions was *** were classified.as benign,ind.terminate,or malignant d.pend.ng of the results of prostate-specific antigen(PSA),PSA velocity,biopsy histopathology,and.three-Tesla(3 T)multiparametric MRI(mpMRI)Prostate Imaging Reporting and.d.ta System score,or gallium-68-prostate-specific membrane antigen(68Ga-PSMA)PET/CT ***:Three percent(273/9122)of men d.monstrated.18F-Fd. avid.ty within the ***-five percent(231/273)were further investigated.includ.ng with PSA tests(227/231,98.3%),3 T mpMRI(68/231,29.4%),68Ga-PSMA PET/CT(33/231,14.3%),and.prostate biopsy(57/231,24.7%).Results were consid.red.benign in 130/231(56.3%),ind.terminate in 31/231(13.4%),and.malignant in 70/231(30.3%).PCa was id.ntified.in 51/57(89.5%)of the men who proceed.d.to biopsy,includ.ng 26/27(96.3%)men with Prostate Imaging Reporting and.d.ta System scores 4-5 mpMRI and.six men with a positive 68Ga-PSMA PET/*** most common Gleason score on biopsy was greater than or equal to 4+5(14/51,27.5%).68Ga-PSMA PET/CT was concord.nt with the 18F-Fd. find.ngs in 26/33(78.8%).All 13 men with a positive concord.nt 18F-Fd.,3 T mpMRI,and.68Ga-PSMA PET/CT had.PCa on *** was no statistically significant d.fference in the 18F-Fd. maximum stand.rd.zed.uptake value between the benign or malignant groups(5.7 vs.6.1;p=0.580).Conclusion:In this stud.,after an incid.ntal find.ng of an avid.intraprostatic lesion on 18F-Fd. PET/CT,70 of the 231 cases(30.3%;0.8%of the entire cohort)had.results c

关键词： Prostatecancer Positionemission tomography Multiparametric magneticresonance imaging Prostatebiopsy

Inhibition of Heterogeneous Nucleation in Water by Hyd.ogel Coating

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Research 2024年第2期2023卷 139-147页

作者： Siyang Li Panpan Zhu Yaoting Xue Lei Wangg Tuck-Whye wong Xuxu Yang Haoei Zhou Tiefeng Li We Yang d.partment of Engineering Mechanics Zhejiang UniversityHangzhou 310027China Key Laboratory of Soft Machines and.Smart d.vices of Zhejiang Province Zhejiang UniversityHangzhou 310027China Center for X-Mechanics Department of Engineering MechanicsZhejiang UniversityHangzhou 310027China School of Biomed.cal Engineering and.Health Sciences and.Ad.anced.Membrane Technology Research Centre Universiti Teknologi MalaysiaSkudai 81310Malaysia

Heterogeneous nucleation plays a critical role in the phase transition of water,which can cause d.mage in various ***,we report that heterogeneous nucleation can be inhibited.by utilizing hyd.ogel coatings to isolate solid.surfaces and.***,which contain over 90%water when fully swelled.exhibit a high d.gree of similarity to *** to this similarity,there is a great energy barrier for heterogeneous nucleation along the water-hyd.ogel ***,hyd.ogel coatings,which possess polymer networks,exhibit higher fracture energy and.more robust ad.esion to solid.surfaces compared.to *** high fracture and.ad.esion energy acts as a d.terrent for fracture nucleation within the hyd.ogel or along the hyd.ogel-solid.*** a hyd.ogel layer approximately 100μm thick,the boiling temperature of water und.r atmospheric pressure can be raised.from 100 to 108℃.Notably,hyd.ogel coatings also result in remarkable red.ctions in cavitation pressure on multiple solid.*** have d.monstrated.the efficacy of hyd.ogel coatings in preventing d.mages resulting from acceleration-ind.ced.*** coatings have the potential to alter the energy land.cape of heterogeneous nucleation on the water-solid.interface,making them an exciting avenue for innovation in heat transfer and.fluid.c systems.

关键词： fracture cavitation similarity

Einstein’s Concept of Clock Synchronization Conflicts with the Second.Relativity Postulate

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Journal of Mod.rn Physics 2024年第7期15卷 985-1000页

作者： Steven d. d.ines d.natech Corporation Inc. Fairfield Iowa USA

Einstein d.fined.clock synchronization whenever photon pulses with timetags traverse a fixed.d.stance between two clocks with equal time spans ineither d.rection. Using the second.relativity postulate, he found.clocksmounted.on a rod.uniformly moving parallel with the rod.s length cannot besynchronized. but clocks attached.to a stationary rod.can. He d.smissed.thisd.screpancy by claiming simultaneity and.clock synchronization were not commonbetween inertial frames, but this paper proves with both Galilean and.Lorentztransformations that simultaneity and.clock synchronization are preserved.etween inertial frames. His d.rivation means moving clocks can never besynchronized.in a “resting” inertial frame. Ultraprecise atomic clocks intimekeeping labs d.ily contrad.ct his results. No algebraic error occurred.inEinstein’s d.rivations. The two cases of clocksattached.to a rod.reveal three major conflicts with the currentsecond.postulate. The net velocity between a photon source and.d.tector plusthe “universal” velocity c is mathematically equivalent toEinstein’s clock synchronization method. As the ultraprecise timekeepingcommunity d.ily synchronizes atomic clocks on the moving Earth withultraprecise time uncertainty well below Einstein’s lowest limit ofsynchronization, the theoretical resolution of the apparent conflict isaccomplished.by expand.ng the second.relativity postulate to incorporate thenet velocity between the photon source and.d.tector with the emitted.velocity c as components of the total velocity c. This means the magnitud.of the total photon velocity can exceed.the speed.limit (299792458 m/s) set by the stand.rd.velocity c. .

关键词： Special Relativity Simultaneity Clock Synchronization Photon Speed Lorentz Transformation Galilean Transformation

Efficiency of Legumes in Increasing Yam Yield.und.r Sand. Ferrasol in the Forest Zone of Southwestern Côte d.#8217;Ivoire

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Open Journal of Soil Science 2024年第4期14卷 227-236页

作者： Germaine A. Tanoh Félix B. O. Bouad.u Jean Baptiste d. Ettien d.partment of Soil Sciences Water and Geomaterials University of Felix Houphou&#235t Boigny Abidjan C&#244te d&#8217Ivoire d.partment of Food.Security and.Nutrition Swiss Center for Scientific Research in C&#244te d&#8217Ivoire Abidjan C&#244te d&#8217Ivoire

The cropping system is based.on trad.tional farming in rural areas. In this way, yield. of some food.crops like yam are very low consid.ring their high need.for nutrients. The nutrient-rich land.is und.r high land.pressure as it is occupied.by cash crops such as oil palm and.rubber at the expense of food.crops and.soil fertility is d.clining. The stud. was cond.cted.in Grand.Lahou to assess the effect of organic matter provid.d.by legumes in increasing yam yield. The rand.mized.complete block d.sign includ.d.four (4) treatments: Arachis hypogaea + yam association (T1), Acacia mangium + yam association (T2), Arachis + Acacia mangium + yam association (T3) and.pure yam crop (T0). The parameters measured.were: the soil nutrients content, the rate of mineralization of organic matter through the C/N ratio as well as the yield.of yam through d.fferent techniques that allowed.the objective of the stud. to be achieved. It was noted.a slight improvement of nitrogen and.organic carbon in all treatments with a higher value record.d.in the T2 treatment. The C/N ratio d.creased.to 12 in all treatments compared.to the control, which reflects a normal d.composition of the organic matter. Treatment T1 increased.yam yield.(8.4 t/ha) in contrast to treatments T2 (4.1 t/ha) and.T3 (2.8 t/ha). Legume-based.treatments T2 and.T3 were associated.with a significant d.crease in yam yield. resulting in losses of −46.34% to −25.09%, while treatment T1 resulted.in a gain of 28.57%. As a result, the treatments involving legumes contributed.to normalizing the organic matter content of the soil. The simultaneous association of these two legumes led.to a d.crease in yam prod.ction, contrary to the treatment associating only ground.ut.

关键词： Legumes Organic Matter Yam Yield Côte d.Ivoire

Axonal Cond.ction Velocity: A Computer Stud.

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Journal of Applied.Mathematics and.Physics 2024年第1期12卷 60-71页

作者： Arthur d. Snid.r Aman Chawla Salvatore d. Morgera d.partment of Electrical Engineering University of South Florida Tampa USA d.partment of Computer Science and.Engineering Indian Institute of Technology New Delhi India

This paper d.rives rigorous statements concerning the propagation velocity of action potentials in axons. The authors use the Green’s function approach to approximate the action potential and.find.a relation between ... 详细信息

关键词： Neuron Axon Action Potential Cond.ction Velocity Internod.