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A survey on future research about electron beam welding for aerospace applications

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China Welding 2018年第1期27卷 60-64页

作者： Ajith Raj Rajendran Dev anand manoharan Department of Aeronautical Engineering Noorul Islam Centre for Higher EducationKanyakumari 629180India Noorul Islam Centre for Higher Education Kanyakumari 629180India

Electron beam welding plays an important role in the aerospace industry where components like sensors,gears,actuators and air frames used in aircraft and rocket engines were welded using this *** is normally performed in a vacuum to avoid the scatter of electron due to the presence of gas molecules in the atmosphere and hence electron beam welding process provides the greater *** still joining of dissimilar metals is *** paper represents review of process,generation and distribution of heat source various input parameters,materials,microstructure,mechanical strength and the possibilities of joining dissimilar metals using electron beam welding.

关键词： dissimilar metal joints electron beam welding mechanical strength microstructure

Comparative efficacy of hyperbaric bupivacaine vs hyperbaric ropivacaine in spinal anesthesia for cesarean section:A metaanalysis

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World Journal of Methodology 2025年第2期15卷 154-165页

作者： Rishi anand Deb Sanjay Nag Roushan Patel Prashant Sharma Vamsi Krishna Uppalapati Umesh Kumar Singh Department of Anaesthesiology Tata Main HospitalJamshedpur 831001JhārkhandIndia

BACKGROUND Intrathecal bupivacaine is the traditional anesthetic drug used in spinal anesthesia for caesarean sections(CSs),but ropivacaine has emerged as a potential *** meta-analysis compares the efficacy and safety of intrathecal hyper-baric bupivacaine vs hyperbaric ropivacaine for cesarean *** To systematically evaluate and compare the efficacy and safety of intrathecal hyperbaric bupivacaine and hyperbaric ropivacaine for spinal anesthesia in *** A thorough search of electronic databases was carried out to find pertinent randomized controlled trials(RCTs)comparing intrathecal hyperbaric ropi-vacaine and hyperbaric bupivacaine during ***,Cochrane database,Google Scholar,and Scopus were searched,and papers from January 2000 to January 2024 were deemed eligible and filtered using predetermined inclusion and exclusion *** were assessed for methodological quality,and data were extracted for time to adequate anesthesia(sensory and motor blockade),duration of sensory and motor block,hemodynamic changes and side effect *** standardized mean difference with 95%CI was used for continuous *** variables were assessed using the Mantel-Haenszel test and the random effect model to compute the odds *** Total 8 RCTs were selected from a pool of 119 search results for *** meta-analysis evaluated pooled effect sizes and assessed heterogeneity among the *** primary objective was to compare key outcomes to identify any significant variances in efficacy and safety profiles between two local *** analysis revealed that the difference in the onset of sensory blockade between the two local anesthetics was statistically insignificant(P=0.1586).However,the onset of motor blockade appeared to be faster with bupivacaine(P=0.03589).Additionally,the regression of sensory and motor blockade occurred earlier in the ropivacaine ***,the duration of the first analgesic

关键词： Ropivacaine Bupivacaine Anesthesia Spinal Cesarean section Meta-analysis

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重塑当代女性的轮廓孟买NEZO零售店

室内设计与装修 2025年第1期 74-77页

作者：无 Pankaj anand(摄影) 西溪(编译) Sanjay Puri Architects 不详

NEZO创始人发现,印度市场缺乏具有西式风格样式的服装,于是决定创建这个独特的品牌,旨在汇聚来自全国的设计师,展示设计的多元化。她深信,印度的设计师代表着时尚的未来。基于这一信念,她邀请Sanjay Puri Architects建筑师事务所打造了... 详细信息

NEZO创始人发现,印度市场缺乏具有西式风格样式的服装,于是决定创建这个独特的品牌,旨在汇聚来自全国的设计师,展示设计的多元化。她深信,印度的设计师代表着时尚的未来。基于这一信念,她邀请Sanjay Puri Architects建筑师事务所打造了一个充满活力、具有前瞻性和现代感的空间。

关键词：建筑师事务所当代女性现代感展示设计多元化前瞻性

A green path to extract carbon quantum dots by coconut water:Another fluorescent probe towards Fe^(3+) ions

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Particuology 2021年第5期19卷 251-258页

作者： manoharan Preethi Chinnuswamy Viswanathan Nagamony Ponpandian Department of Nanoscience and Technology Bharathiar UniversityCoimbatore 641046India

In recent years,carbon quantum dots(CQDs)have been of great enthrallment in the fluorescent probe *** precursors with interesting physicochemical properties may be derived from natural *** this research,for the first time,coconut water has been used as a source of carbon to prepare blue fluorescent CQDs without any modification and *** preparation of CQDs is very simple and cost-effective,when compared with other conventional *** reaction parameters temperature and pH were varied to obtain monodispersed spherical CQDs with an average grain size of ∼5 *** CQDs exhibit blue emission with a wavelength of 487 nm with an excitation wavelength of 390 nm and are used for Fe^(3+) ions ***^(3+) ions have been observed to quench the fluorescence intensity of the CQDs than other heavy *** the presence of Fe^(3+) ions,the fluorescent CQDs are quenched due to the interaction of CQDs and Fe^(3+) ions.A spectroscopic result shows that Fe^(3+) ions can be observed within a concentration of 0-700μM,as well as the detection limit is 0.30μ*** CQDs provide a unique pathway for potential application in the environmental monitoring of heavy metal ions.

关键词： Green preparation of CQDs Coconut water Stirrer-assisted technique Detection of metal ions Quenching efficiency Nonfluorescence

Selection of Machining Datum and Allocation of Tolerance through Tolerance Charting Technique

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Chinese Journal of Mechanical Engineering 2012年第4期25卷 697-705页

作者： THILAK manoharan SIVAKUMAR Karuppan JAYAPRAKASH Govindharajalu Department of Mechanical Engineering TRP Engineeering CollegeTiruchirappalli-621105TamilNaduIndia Department of Mechanical Engineering Bannari Amman Institute of TechnologySathyamangalam-638401TamilNaduIndia Department of Mechanical Engineering Shivani Engineering CollegeTiruchirappalli-620009TamilNaduIndia

Tolerance charting is an effective tool to determine the optimal allocation of working dimensions and working tolerances such that the blueprint dimensions and tolerances can be achieved to accomplish the cost *** selection of machining datum and allocation of tolerances are critical in any machining process planning as they directly affect any setup methods/machine tools selection and machining *** paper mainly focuses on the selection of optimum machining datums and machining tolerances simultaneously in process planning.A dynamic tolerance charting constraint scheme is developed and implemented in the optimization *** optimization model is formulated for selecting machining datum and tolerances and implemented with an algorithm namely Elitist Non-Dominated Sorting Genetic Algorithm（NSGA-II）.The computational results indicate that the proposed methodology is capable and robust in finding the optimal machining datum set and tolerances.

关键词： tolerance allocation tolerance charting elitist non-dominated sorting genetic algorithm-II.

Studies on rock magnetic and paleointensity of some archaeological artifacts from Tamilnadu,India

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第7期9卷 988-993页

作者： Chellachamy manoharan Kasinathan VEERAMUTHU Ramdoss VENKATACHALAPATHY Ramasamy ILANGO Department of Physics Annamalai UniversityAnnamalai Nagar 608002TamilnaduIndia Department of Physics RKM Vivekananda CollegeChennai 600004TamilnaduIndia

This study investigates the magnetic mineralogy and paleointensity values of a collection of archaeological artifacts(pottery) . The actual magnetic carriers and their domain states present in the archaeological pottery were obtained using the low field susceptibility,thermomagnetic curves and acquisition of isothermal remanence. The magnetic mineralogy of all the samples was dominated by ferrimagnetic mineral(magnetite/magnetite with low titanium content) ,which was suitable for paleointensity measurements. The geomagnetic paleointensity value obtained by subjecting them to modified Thellier and Thellier method,is found to be(48.81±0.15) μT.

关键词： Magnetic susceptibility Archaeological pottery Paleointensity

Seismic bearing capacity of strip footing on partially saturated soil using modal response analysis

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Earthquake Engineering and Engineering Vibration 2022年第3期21卷 641-662页

作者： Abhijit anand Rajib Sarkar Department of Civil Engineering IIT(ISM)DhanbadDhanbad 826004India

The present study proposes a novel and simplified methodology to assess the seismic bearing capacity(SBC) of a shallow strip footing by incorporating strength non-linearity arising due to partial saturation of a soil matrix. Furthermore, developed methodology incorporates the modal response analysis of soil layers to assess SBC. A constant matric suction distribution profile has been considered throughout the depth of the soil. The Van Genuchten equation and corresponding fitting parameters have been considered to quantify matric suction in the analysis. SBC has been obtained for three different geomaterials;viz. sand, fly ash and clay, based on their predominant grain size and diverse soil water characteristics curve(SWCC) attributes. Variation of SBC with different modes of vibration and damping ratio are reported for ranges of matric suction pertinent to the geomaterials considered in the study. The relative significance of matric suction on SBC has been reported for suction values within the transition zone of each geomaterial. It is observed that the SBC of sand is drastically reduced, with matric suction reaching beyond the residual suction value. The SBC of fly ash remains constant beyond the residual suction value, whereas the SBC of clay shows an increasing trend toward the practical range of matric suction values.

关键词： seismic bearing capacity modal analysis matric suction

Torus actions, fixed-point formulas, elliptic genera and positive curvature

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Frontiers of Mathematics in China 2016年第5期11卷 1151-1187页

作者： anand DESSAI Institute of Mathematics Beijing Jiaotong University Beijing 100044 China

We study fixed points of smooth torus actions on closed manifolds using fixed point formulas and equivariant elliptic genera. We also give applications to positively curved Riemannian manifolds with symmetry.

关键词： Torus actions fixed point formulas equivariant indices elliptic genera rigidity and vanishing

Preventive Regulation of Jelly Seed Disorder in ‘Amrapali' Mango (Mangifera indica) by Preharvest Spray

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Horticultural Plant Journal 2019年第2期5卷 70-78页

作者： Shivashankar Seshadri Sumathi manoharan Hari Shankar Singh Division of Plant Physiology and Biochemistry ICAR-Indian Institute of Horticultural ResearchHesaraghatta Lake PO ICAR-National Centre for Integrated Pest Management Pusa Campus

Jelly seed, a physiological disorder in ‘Amrapali' mango fruit, is characterized by the excessive softening of pulp around the stone in ripe fruits. The disorder is caused by the onset of germination associated events in the seed of developing fruit due to decreased level of very-longchain fatty acids(VLCFAs) in seed. Field trials involving preharvest application of spray formulations on developing fruits, between 50% and 60%maturity, showed that formulation V(10 g·L^(-1) NaCl, 25 g·L^(-1) CaCl_2, 0.5 g·L^(-1) KCl, 0.01 g·L^(-1) H_3 BO_3, 0.01 g·L^(-1) Cu SO_4, 0.01 g·L^(-1) Zn SO_4,0.01 g·L^(-1) FeSO_4, 0.01 g·L^(-1) MnSO_4, and 0.002 g·L^(-1) EDTA) was the most effective in preventing the jelly seed disorder. Further studies to understand the mode of action of the formulation in controlling jelly seed development, revealed increased synthesis of VLCFAs in seed followed by the rapid production of ABA and germination-inhibiting phenolic acids, besides increased accumulation of calcium in seed. These factors acting in unison delayed seed germination and decreased the activities of pectinolytic enzymes in pulp to produce healthy fruits, free from jelly seed *** was an increase of mineral nutrient content in pulp of treated healthy fruits. Thus, the study helped to develop a remedy to prevent jelly seed besides revealing the biochemical mechanism by which formulation V acted to produce ‘Amrapali' mango fruits free of jelly seed with improved nutritional quality.

关键词： Amrapali mango jelly seed physiological disorder prevention preharvest treatment