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AGWO-CNN Classification for Computer-Assisted Diagnosis of Brain Tumors

Computers, Materials & Continua 2022年第4期71卷 171-182页

作者： T.jeslin j.arul linsely Department of Electronics and Communication Engineering Universal College of Engineering and TechnologyVallioor627117India Department of Electrical and Electronics Engineering Noorul Islam Centre for Higher EducationKumarakovil629180India

Brain cancer is the premier reason for cancer deaths all over the *** diagnosis of brain cancer at an initial stage is mediocre,as the radiologist is *** experiments have been conducted and demonstrated clearly that the algorithms for nodule segmentation are ***,the research has consolidated incremental clustering focused on superpixel segmentation as an appropriate optimization approach for the accurate segmentation of pulmonary *** key aim of the research is to refine brain CT images to accurately distinguish tumors and the segmentation of small-scale anomalous nodules in the brain *** the beginning stage,an anisotropic diffusion filters(ADF)method with un-sharp intensification masking is utilized to eliminate the noise discernment in *** the following stage,within the improved nodule image sequence,a Superpixel Segmentation Based Iterative Clustering(SSBIC)algorithm is proposed for irregular brain tissue ***,the brain nodule samples are captured using deep learning methods:Advanced Grey Wolf Optimization(AGWO)with ONN(AGWO-ONN)and Advanced GWO with CNN-based(AGWOCNN).The proposed technique indicates that the sensitivity is increased and the calculation time is ***,the proposed methodology manifests that the advanced Computer-Assisted Diagnosis(CAD)system has outstanding potential for automatic brain tumor *** average segmentation time of the nodule slice order is 1.06s,and 97%of AGWO-ONN and 97.6%of AGWO-CNN achieve the best classification reliability.

关键词： Advanced GWO with ONN(AGWO-ONN) Advanced GWO with CNN(AGWO-CNN) brain cancer superpixel segmentation based iterative clustering(SSBIC)algorithm

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Embryo-to-lamella transition of grain boundary twins in magnesium

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journal of Magnesium and Alloys 2023年第12期11卷 4485-4497页

作者： Mariyappan arul Kumar Irene j Beyerlein Materials Science and Technology Division Los Alamos National LaboratoryLos AlamosNM 87545USA Mechanical Engineering Department Materials DepartmentUniversity of CaliforniaSanta BarbaraCA 93106USA

A combined experimental and computational analysis is performed to investigate the less commonly studied embryo-to-lamella transition of deformation twins in magnesium. This work aims to understand the structural variables controlling the embryo-to-lamella transition from grain boundaries. Statistical analysis of hundreds of early-stage twins in the lightly deformed microstructure reveals a prevailing wedge shape,with a much thicker base along the grain boundary(GB) where they originate and a thinner tip terminating in the crystal. The analysis also shows that the GB base is super thick and identifies a minimum GB twin thickness among all early-stage twins that is about one micron. A crystal plasticity-based full-field model is employed to calculate the driving forces to migrate the boundary of a three-dimensional GB twin embryo. The stress analysis, considering a full range of embryo shapes and neighboring grain orientations, indicate that the twin embryo is most likely going to form a wedge shape when it first propagates. The calculations predict that the thickness of the embryo at the GB needs to be significantly larger than its length into the crystal in order to propagate into the crystal. The analysis finds that the more aligned the twin embryo variant is with basal slip in the neighboring grain, the thinner the twin embryo needed for propagation.

关键词： Magnesium Twin embryo Crystal plasticity Nucleation Grain neighbor

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Structure and magnetic properties of Cu-Ni alloy nanoparticles prepared by rapid microwave combustion method

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Transactions of Nonferrous Metals Society of China 2014年第5期24卷 1467-1473页

作者： j.arul MARY A.MANIKANDAN L.jOHN KENNEDY M.BOUOUDINA R.SUNDARAM j.jUDITH VIjAYA Catalysis and Nanomaterials Research Laboratory Department of Chemistry Loyola College Materials Division School of Advanced Sciences Vellore Institute of Technology (VIT) UniversityChennai Campus Department of Physics College of Science University of Bahrain Nanotechnology Centre University of Bahrain Department of Chemistry Presidency College

Cu-Ni alloy nanoparticles were prepared by a microwave combustion method with the molar ratios of CU2＋ to Ni2＋ as 3：7, 4：6, 5：5, 6：4 and 7：3. The as-prepared samples were characterized by XRD, HR-SEM, EDX and VSM. XRD and EDX analyses suggest the formation of pure alloy powders. The average crystallite sizes were found to be in the range of 21.56-33.25 nm. HR-SEM images show the clustered/agglomerated particle-like morphology structure. VSM results reveal that for low Ni content （CusNis, Cu6Ni4 and Cu7Ni3）, the system shows paramagnetic behaviors, whereas for high Ni content （Cu3Ni7 and Cu4Ni6）, it becomes ferromagnetic.

关键词： microwave combustion nanoparticles Cu-Ni alloys magnetization property

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Analysis of a tunnel failure caused by leakage of the shield tail seal system

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Underground Space 2020年第2期5卷 105-114页

作者： Chao Yu Annan Zhou jun Chen arul arulrajah Suksun Horpibulsuk State Key Laboratory of Ocean Engineering Department of Civil EngineeringSchool of Naval ArchitectureOcean and Civil EngineeringShanghai Jiao Tong UniversityShanghai 200240China Discipline of Civil and Infrastructure Engineering School of EngineeringRoyal Melbourne Institute of Technology(RMIT)Victoria 3001Australia Department of Civil and Construction Engineering Swinburne University of TechnologyVictoria 3122Australia School of Civil Engineering and Center of Excellence in Innovation for Sustainable Infrastructure DevelopmentSuranaree University of TechnologyNakhon Ratchasima 30000Thailand

This paper presents an analysis of a tunnel failure accident during shield tunnel construction on Foshan Metro Line 2 in *** failure is caused by the leakage of the multilayer seal system,which consists of several brush seals at the tail of the *** different failure modes for the multilayer seal system are discussed.A simple structural analysis of the brush seals is then conducted,and failure mode 4(failure due to brush seal deformation)is identified as a major reason for the Foshan tunnel accident.A finite element method(FEM)analysis is employed to validate the conclusions drawn from the simple structural analysis of the brush seals.

关键词： Leakage Shield tunneling Brush seals Finite element

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Environmentally sustainable groundwater control during dewatering with barriers:A case study in Shanghai

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Underground Space 2021年第1期6卷 12-23页

作者： Zhi-Fei Xie Shui-Long Shen arul arulrajah Suksun Horpibulsuk Department of Civil Engineering School of Naval ArchitectureOcean and Civil EngineeringShanghai Jiao Tong UniversityShanghai 200240China Department of Civil and Environmental Engineering Shantou UniversityShantouChina Key Laboratory of Intelligent Manufacturing Technology(Shantou University) Ministry of EducationShantouGuangdong 515063China Department of Civil and Construction Engineering Swinburne University of TechnologyVictoria 3122Australia School of Civil Engineering and Center of Excellence in Innovation for Sustainable Infrastructure DevelopmentSuranaree University of TechnologyNakhon Ratchasima 30000Thailand

This paper presents a case study on groundwater control and environmental protection during a deep excavation of the foundation pit for the Liyang Road Station of Metro Line 10 in Shanghai.A three-dimensional finite element simulation model was constructed to quantify the effects of a dewatering process on the environment around the excavation *** understand the decrease in the groundwater level around the foundation pit,the ground settlement and groundwater level were *** the excavation,environmental protection methods were used in the design of the optimal watering system to check its detrimental environmental *** effects of the diaphragm wall and horizontal barrier system were analyzed by varying their insertion depths and the resulting changes in the ground settlement and groundwater level were *** was found that increasing the insertion depth of the diaphragm wall reduced settlement near the excavation site but increased the construction *** diaphragm wall used in combination with a horizontal barrier was found to be effective in arresting the decrease in groundwater level and reducing settlement around the excavation site.

关键词： Dewatering Horizontal barrier Diaphragm wall Ground settlement Drawdown Confined water

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Giant mid-IR resonant coupling to molecular vibrations in sub-nm gaps of plasmonic multilayer metafilms

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Light(Science & Applications) 2022年第10期11卷 2476-2484页

作者： Rakesh arul David-Benjamin Grys Rohit Chikkaraddy Niclas S.Mueller Angelos Xomalis Ermanno Miele Tijmen Geuser jeremy j.Baumberg NanoPhotonics Centre Cavendish LaboratoryDepartment of PhysicsJJ Thompson AvenueUniversity of CambridgeCambridge CB30HEUnited Kingdom The Faraday Institution Quad OneHarwell Science and Innovation CampusDidcotUnited Kingdom

Nanomaterials capable of confining light are desirable for enhancing spectroscopies such as Raman scattering,infrared absorption,and nonlinear optical *** superlattices have shown the ability to host collective resonances in the mid-infrared,but require stringent fabrication processes to create well-ordered ***,we demonstrate how short-range-ordered Au nanoparticle multilayers on a mirror,self-assembled by a sub-nm molecular spacer,support collective plasmon-polariton resonances in the visible and infrared,continuously tunable beyond 11 pm by simply varying the nanoparticle size and number of *** resulting molecule-plasmon system approaches vibrational strong coupling,and displays giant Fano dip strengths,SEIRA enhancement factors~106,light-matter coupling strengths g~100 cm-1,Purcell factors~106,and mode volume compression factors~*** collectiive plasmon-polariton mode is highly robust to nanoparticle vacancy disorder and is sustained by the consistent gap size defined by the molecular *** disorder efficiently couples light into the gaps between the multilayers and mirror,enabling Raman and infrared sensing of sub-picolitre sample volumes.

关键词： coupling collective mirror

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Local hardening and asymmetric twin growth by twin-twin interactions in a Mg alloy

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journal of Magnesium and Alloys 2023年第1期11卷 176-191页

作者： Krishna Yaddanapudi Mariyappan arul Kumar jiaxiang Wang Xin Wang Timothy j.Rupert Enrique j.Lavernia julie M.Schoenung Irene j.Beyerlein Subhash Mahajan Department of Materials Science and Engineering University of CaliforniaDavisCA 95616USA Materials Science and Technology Division Los Alamos National LaboratoryLos AlamosNM 87545USA Department of Mechanical Engineering Materials DepartmentUniversity of CaliforniaSanta BarbaraCA 93106USA Department of Materials Science and Engineering University of CaliforniaIrvineUSA Materials Department University of CaliforniaSanta BarbaraCA 93106USA

In this study,the role of twin-twin interactions on the distributions of local defects(e.g.,dislocations)and stress fields in a magnesium alloy is investigated.A co-zone(1012)-(1012)tensile twin junction in a deformed Mg-3wt.%Y alloy is analyzed using transmission electron microscopy(TEM).The results show that the morphology of the impinging(1012)twin is asymmetric,and the non-interacting boundary of the recipient(1012)twin is *** analysis of TEM images reveals that type-II pyramidal[1213](1212)dislocations concentrate in the vicinity of the twin-twin junction *** samedislocations are also observed inside the interacting twin domains along with a few ***dislocations emanating from the impinging(1012)twin boundary have edge character and are extended with faults parallel to the basal *** contrast,thedislocations connected to the recipient(1012)twin are predominantly screw orientation and ***-viscoplastic fast Fourier transform based crystal plasticity calculations are performed to rationalize the observed twin morphology and local dislocation *** model calculations suggest that the local stress fields generated at the junction site where the two twins meet are responsible for the experimentally observed concentration of*** calculated stress fields are asymmetric with respect to the junction site,explaining the observed asymmetric morphology of the impinging ***,these findings show strong effects of twin-twin interactions on the distribution of dislocations as well as the evolution of the twinned microstructure and as such,can help advance understanding of twinning in Mg alloys and their effect on mechanical behavior.

关键词： Tensile twins Twin-twin intersections Mg alloys Crystal plasticity TEM

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Effect of methoxychlor on antioxidant system of goat epididymal sperm in vitro

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Asian journal of Andrology 2001年第4期3卷 285-288页

作者： Bindu Gangadharan M.arul Murugan P.P.Mathur School of Life Sciences Pondicherry University Pondicherry 605 014 IndiaSchool of Life Sciences Pondicherry University Pondicherry 605 014 IndiaSchool of Life Sciences Pondicherry University Pondicherry 605 014 India

Aim: To evaluate the effect of methoxychlor on the antioxidant system of goat epididymal sperm. Methods:Epididymis of adult goat was obtained from local slaughter houses and sperm were collected by chopping the epididymisin modified Ringer's phosphate solution (RPS). After several washings, the sperm samples were dispersed in RPS andincubated with methoxychlor (1μmol/L, 10μmol/L and 100μmol/L) and methoxychlor + vitamin C (100μmol/Leach) for 3 h at 32℃. After incubation, the sperm motility and viability were assessed. An aliquot of sperm samplewas homogenized, centrifuged and used for the assay of superoxide dismutase, glutathione peroxidase, glutathione re-ductase and lipid peroxidation. Results; In methoxychlor-incubated sperm and in sperm co-incubated with methoxy-chlor and vitamin C, the sperm motility and viability showed no significant changes as compared to the correspondingcontrols. In methoxychlor-incubated sperm the activity of superoxide dismutase, glutathione reductase and glutathioneperoxidase were decreased while lipid peroxidation was increased in a dose-dependent manner. Co-incubation of spermwith methoxychlor and vitamin C showed no changes in the activity of superoxide dismutase, glutathione reductase andglutathione peroxidase and in the level of lipid peroxidation. Conclusion; Methoxychlor induced oxidative stress inepididymal sperm of goats by decreasing the levels of antioxidant enzymes. Co-incubation of sperm with methoxychlorand vitamin C, a natural antioxidant, reversed the effect of methoxychlor. (Asian j Androl 2001 Dec; 3; 285 - 288)

关键词： methoxychlor vitamin C epididymis spermatozoa antioxidants reactive oxygen species goats

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Multi objective prediction and optimization of control parameters in the milling of aluminium hybrid metal matrix composites using ANN and Taguchi-grey relational analysis

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Defence Technology（防务技术） 2019年第4期15卷 545-556页

作者： S.Ajith arul Daniel R.Pugazhenthi R.Kumar S.Vijayananth Department of Mechanical Engineering Vels Institute of ScienceTechnology and Advanced Studies

This study aims to optimize the input parameters such as mass fraction and particle size of SiC along with depth of cut,feed and cutting speed in the milling of Al5059/SiC/*** hybrid metal matrix composites are generally fabricated by reinforcing of different sizes(10,20,40 μm)of SiC with aluminium at a different levels(5%,10%& 15%)whereas the MoS2 addition is fixed as 2%.The effect of each control factor on response variables are analyzed through Taguchi S/N ratio ***,the most significant method for prediction of response parameters is satisfied by ANN model than the regression *** of variance(ANOVA)results envisage that mass fraction of SiC,feed rate is the most domineering factor on response variable.

关键词： Silicon carbide Temperature Surface roughness Cutting forces Artificial neural network Grey relational analysis

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Venous thromboembolism prophylaxis practice and its association with outcomes in Australia and New Zealand burns patients

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Burns & Trauma 2021年第1期9卷 642-651页

作者： Lincoln M.Tracy Peter A.Cameron Yvonne Singer arul Earnest Fiona Wood Heather Cleland Belinda j.Gabbe School of Public Health and Preventive Medicine Monash University553 St Kilda RoadMelbourneVictoria3004Australia Emergency and Trauma Centre The Alfred HospitalCommercial RoadMelbourneVictoria3004Australia Victorian Adult Burns Service Alfred Hospital55 Commercial RoadMelbourneVictoria3004AustraliaAustralia Registry Sciences Unit Department of Epidemiology and Preventive MedicineMonash University553 St Kilda RoadMelbourneVictoria3004Australia Biostatistics Unit Department of Epidemiology and Preventive MedicineMonash University553 St Kilda RoadMelbourneVictoria3004Australia Burn Injury Research Unit University of Western Australia35 Stirling HighwayPerthWestern Australia6009Australia Health Data Research UK Swansea University Medical SchoolSwansea UniversitySingleton ParkSwanseaUK

Background:Patients with burn injuries are considered to have an increased risk of venous thromboembolism(VTE).While untreated VTEs can be fatal,no studies have examined chemoprophylaxis *** study aimed to quantify the variation in prevalence of VTE prophylaxis use in patients in Australian and New Zealand burns units and whether prophylaxis use is associated with in-hospital outcomes following burn ***:Admission data for adult burns patients(aged≥16 years)admitted between 1 july 2016 and 31 December 2018 were extracted from the Burns Registry of Australia and New *** effects logistic regression modelling investigated whether VTE prophylaxis usewas associated with the primary outcome of in-hospital ***:There were 5066 admissions over the study *** these patients,81%(n=3799)with a valid response to the VTE prophylaxis data field received some form of VTE *** of VTE prophylaxis ranged from 48.6%to 94.8%of patients between ***-hospital death was recorded injusting for confounders,receiving VTE prophylaxis was associated with a decrease in the adjusted odds of in-hospital mortality(adjusted odds ratio=0.21;95%CI,0.07–0.63;p=0.006).Conclusions:Variation in the use of VTE prophylaxis was observed between the units,and prophylaxis use was associated with a decrease in the odds of *** findings provide an opportunity to engage with units to further explore differences in prophylaxis use and develop future best practice guidelines.

关键词： Burn injury Venous thromboembolism Prophylaxis Australia New Zealand

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