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Wind Tunnel Validation of Double Multiple Streamtube Model for Vertical Axis Wind Turbine

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Smart Grid and renewable Energy 2017年第12期8卷 412-424页

作者： Palanisamy Mohan Kumar Sudhakar rao rashmitha Narasimalu srikanth Teik-Cheng Lim Energy research Institute Nanyang Technological University Singapore City Singapore School of Science and Technology Singapore University of Social Sciences Clementi Singapore

The performance and annual energy output have to be predicted to maximize the economic benefits from a wind turbine. Mathematically predicting the performance of Darrieus type lift based turbines are challenging due to the inconsistent angle of attack, blade wake interaction and local induced velocities giving rise to complex flow physics. A reliable and validated mathematical model is therefore essential to optimize the various design parameters prior to manufacture. The objective of the current study is to evaluate widely employed aerodynamic models based on their prediction accuracy, limitations, and computational requirements. Double multiple stream tube models have been discussed in detail and the predictions are experimentally validated through the wind tunnel test of three-bladed H-Darrieus rotor in terms of torque and power coefficient. The possible sources for the deviation between the predicted and measured values have been discussed and concluded with potential solutions.

关键词： Aerodynamic Model Wind Turbine Double Multiple Stream Tube Xfoil Analytical

Adaptation of <i>Arabidopsis</i>Plants to Tropical Aeroponics Using Cool root Zone Temperatures

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American Journal of Plant Sciences 2017年第13期8卷 3295-3312页

作者： Sandhya srikanth Tsui Wei Choong Jiashu Chu Jie He Zhong Chen Natural Sciences and Science Education National Institute of Education Nanyang Technological University Singapore

Arabidopsis thaliana (L.) Heyhn. is a well known model plant in plant research. However, its growth conditions and diminutive stature associated with low biomass at maturity make it a challenging species for physiological studies. While in the tropical countries, it can only be grown either by tissue cultures or in growth chambers under controlled conditions. An aeroponic technique with 20°C ± 2°C and 30°C ± 2°C root-zone temperatures (rZT) was used to grow Arabidopsis (Columbia ecotype) in a tropical greenhouse with natural irradiance and high ambient temperature (38°C/28°C day/night). Seedlings germinated in growth chambers at 20°C or 30°C. At 6 to 8 leaf stage, they were transferred to the aeroponic troughs with their roots exposed to constant temperature of 20°C ± 2°C and 30°C ± 2°C while their aerial parts were subjected to fluctuating ambient temperature from 28°C to 38°C. After a week, plants have acclimatised to both rZTs and started developing normal rosettes, bolted and yielded viable seeds. However, 20°C ± 2°C rZT allowed them to recover from turgor pressure despite of wilting, and significantly increased biomass. Mature plants grown in each rZTs were compared morphologically and physiologically to the plants grown in growth chamber (GC) at 20°C (root and shoot) temperature with 60% relative humidity. Aeroponically grown plants did not experience photoinhibition, and also exhibited higher photosynthetic light usage efficiency and higher capacities of heat dissipation, compared to GC plants. This aeroponics with cool rZTs can allow the use of Arabidopsis as a model plant even under tropical climate.

关键词： Aeroponics Arabidopsis Biomass Seeds root Zone Temperature Tropical

Gut microbiome:the third musketeer in the cancer-immune system cross-talk

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Journal of Pancreatology 2020年第4期3卷 181-187页

作者： Prateek Sharma Tejeshwar Jain Vrishketan Sethi srikanth Iyer Vikas Dudeja DeWitt Daughtry Family Department of Surgery Jackson Memorial HospitalUniversity of MiamiMiamiFLUSA

The fascinating hypothesis that microbes lead to cancer has long been dwelled upon but has only been recently investigated in cancers other than those of stomach and *** can affect cancer cells directly through toxins or *** also play a significant role in the development and maturation of the immune system and can indirectly affect cancer cells through the immune *** mouse models and affordable sequencing technologies,have made it possible in current times,to delineate the role of microbes in undermining cancer immune surveillance and indirectly promoting *** this review,we explore the cancer-gut microbiome-immune trialogue,focusing on pancreatic *** review how gut-microbiome interacts with immune system to promote oncogenesis and how modulation of gut-microbiome can be used as an effective therapeutic strategy to reprogram the immune system for augmenting anti-tumor response and enhance immunotherapy efficacy in traditionally resistant pancreatic cancer.

关键词： Gut microbiome Immunotherapy Pancreatic cancer

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应用平面图分析技术解决地震解释闭合差问题

国外油气勘探 1991年第1期 73-80页

作者： G.srikanth 张玺科黄子齐王冰

本文描述一种能使根据不同时期的地震资料得到的时间等值线一致的方法。与常规采用的闭合测网调节方法不同,本文是从面积的观点来看待这个问题的。该算法包括对出现闭合差的两组独立数据点分别勾绘等值线和通过反向内插法估计平面图中... 详细信息

本文描述一种能使根据不同时期的地震资料得到的时间等值线一致的方法。与常规采用的闭合测网调节方法不同,本文是从面积的观点来看待这个问题的。该算法包括对出现闭合差的两组独立数据点分别勾绘等值线和通过反向内插法估计平面图中的差别。为了获得每一个控制点的校正值,利用逐渐高阶的趋势面来拟合这种差别。在加入校正值之后绘制出的最终等值线图保留两个数据集的每一个所描述的构造特征,同时解决了大部分闭合差的影响。借助个人计算机或工作站的等值线绘图包,这种方法适合于日常应用。为了阐明这种方法,本文解释和处理了一个沉积盆地的地震资料。

关键词：地震解释闭合差反向内插等值线图趋势面

Strip-coalesced interior zone model for two unequal collinear cracks weakening piezoelectric media

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Applied Mathematics and Mechanics(English Edition) 2014年第10期35卷 1249-1260页

作者： r.r.BHArGAVA K.JANGID Department of Mathematics Indian Institute of Technology roorkee

In this paper, a mathematical strip-saturation model is proposed for a poled transversely isotropic piezoelectric plate weakened by two impermeable unequal-collinear hairline straight cracks. remotely applied in-plane unidirectional electromechanical loads open the cracks in mode-I such that the saturation zone developed at the interior tips of cracks gets coalesced. The developed saturation zones are arrested by distributing over their rims in-plane normal cohesive electrical displacement. The problem is solved using the Stroh formalism and the complex variable technique. The expressions are derived for the stress intensity factors （SIFs）, the lengths of the saturation zones developed, the crack opening displacement （COD）, and the energy release rate. An illustrative numerical case study is presented for the poled PZT-5H ceramic to investigate the effect of prescribed electromechanical loads on parameters affecting crack arrest. Also, the effect of different lengths of cracks on the SIFs and the local energy release rate （LErr） has been studied. The results obtained are graphically presented and analyzed.

关键词： crack opening displacement (COD) energy release rate piezoelectric ce-ramic Stroh formalism saturation zone unequal-collinear crack

Associations of Single Nucleotide Polymorphisms in the Bovine <i>FADS</i>6 Gene with Fatty Acid Composition in Hanwoo (Korean Cattle)

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Open Journal of Genetics 2015年第4期5卷 137-144页

作者： Krishnamoorthy srikanth Anam Kwan Eunjin Lee Seonkwan Kim Youngjo Lim Hoyoung Chung Animal Genomics and Bioinformatics Division National Institute of Animal Science Jeonju South Korea

The bovine fatty acid desaturase (FADS) gene cluster consists of FADS1, FADS2, FADS3, and FADS6, which acts as key enzymes in fatty acid metabolism. Of these, the genetics effects of variants in FADS1, FADS2 and FADS3 have been previously studied. However, the genetic effects of variants of FADS6 gene have not been studied. The aim of this study was to identify genetic variants in the bovine fatty acid desaturase 6 (FADS6) gene and study their association with fatty acid composition in Hanwoo cattle. Six genetic variants were observed, three each in intron 2 and exon 6 by DNA sequencing analyses. The association of genetic variants with fatty acid composition was evaluated in 90 Hanwoo steers. The variants were confirmed and the animals were genotyped by rFLP (restriction Fragment Length Polymorphism) and AS-PCr (Allele Specific PCr) analyses. The analysis revealed that palmitoleic acid (C16:1n7) was associated with g.3391G > A, g.3660A > C and g.15657C > T, and stearic acid (C18:0) showed highly significant association with g.3660A > C segments. Both g.3391G > A, g.3660A > C also had strong additive and dominance effect for Palmitoleic acid, while g.3660A > C also had a strong dominance effect for stearic acid. These results could be useful for modulating fatty acid composition in beef and produce meat with higher monounsaturated fatty acid to saturated fatty acid ratio (MUFA/SFA), which had been shown to have positive health effect in humans.

关键词： Fatty Acid Composition Beef FADS6 Genetic Association SNP

Design, simulation and construction of the Taban tokamak

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Plasma Science and Technology 2018年第4期20卷 112-120页

作者： H r MIrZAEI r AMrOLLAHI Statistics of Department of Energy Engineering & Physics Amirkabir University of Tehran Tehran lran

This paper describes the design and construction of the Taban tokamak, which is located in Amirkabir University of Technology, Tehran, Iran. The Taban tokamak was designed for plasma investigation. The design, simulation and construction of essential parts of the Taban tokamak such as the toroidal field(TF) system, ohmic heating(OH) system and equilibrium field system and their power supplies are presented. For the Taban tokamak, the toroidal magnetic coil was designed to produce a maximum field of 0.7 T at r?=?0.45 m. The power supply of the TF was a130 kJ, 0–10 kV capacitor bank. ripples of toroidal magnetic field at the plasma edge and plasma center are 0.2% and 0.014%, respectively. For the OH system with 3 kA current, the stray field in the plasma region is less than 40 G over 80% of the plasma volume. The power supply of the OH system consists of two stages, as follows. The fast bank stage is a 120 μF, 0–5 k V capacitor that produces 2.5 kA in 400 μs and the slow bank stage is 93 mF, 600 V that can produce a maximum of 3 kA. The equilibrium system can produce uniform magnetic field at plasma volume. This system’s power supply, like the OH system, consists of two stages, so that the fast bank stage is 500 μF, 800 V and the slow bank stage is 110 mF, 200 V.

关键词： tokamak magnetic field equilibrium

Complement-dependent neuroinflammation in spinal cord injury:from pathology to therapeutic implications

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Neural regeneration research 2025年第5期20卷 1324-1335页

作者： Hassan Saad Bachar El Baba Ali Tfaily Firas Kobeissy Juanmarco Gutierrez Gonzalez Daniel refai Gerald r.rodts Christian Mustroph David Gimbel Jonathan Grossberg Daniel L.Barrow Matthew F.Gary Ali M.Alawieh Department of Neurosurgery Emory University School of MedicineAtlantaGAUSA Department of Neurology Yale UniversityNew HavenCTUSA Center for Neurotrauma Multiomics&Biomarkers(CNMB)Morehouse School of MedicineAtlantaGAUSA

Spinal cord injury remains a major cause of disability in young adults,and beyond acute decompression and rehabilitation,there are no pharmacological treatments to limit the progression of injury and optimize recovery in this *** the thorough investigation of the complement system in triggering and propagating cerebral neuroinflammation,a similar role for complement in spinal neuroinflammation is a focus of ongoing *** this work,we survey the current literature investigating the role of complement in spinal cord injury including the sources of complement proteins,triggers of complement activation,and role of effector functions in the *** study relevant data demonstrating the different triggers of complement activation after spinal cord injury including direct binding to cellular debris,and or activation via antibody binding to damage-associated molecular *** effector functions of complement have been implicated in spinal cord injury,and we critically evaluate recent studies on the dual role of complement anaphylatoxins in spinal cord injury while emphasizing the lack of pathophysiological understanding of the role of opsonins in spinal cord *** this pathophysiological review,we systematically review the different translational approaches used in preclinical models of spinal cord injury and discuss the challenges for future translation into human *** review emphasizes the need for future studies to dissect the roles of different complement pathways in the pathology of spinal cord injury,to evaluate the phases of involvement of opsonins and anaphylatoxins,and to study the role of complement in white matter degeneration and regeneration using translational strategies to supplement genetic models.

关键词： complement neuroinflammation neuroplasticity regeneration spinal cord injury targeted therapy