Free convection in a non-Darcian wavy porous enclosure

A numerical study of non-Darcian natural convection in a wavy vertical enclosure filled with a porous medium is performed. The flow is modelled using Forchheimer extended Darcy model. The governing equations are solved by finite element method. Numerical results demonstrate the importance of non-Darcian effect. Cumulative heat flux and Nusselt number together with flow and temperature distributions in the form of streamlines and isotherms are presented for a wide range of governing parameters like Grashof number, Rayleigh number, wave amplitude, wave phase and roughness parameter.     

Enhancing Detection of R2L Attacks by Multistage Clustering Based Outlier Detection

Wireless Personal Communications - The modern society is greatly benefited by the advancement of Internet. The contemporary humanity is significantly profited by the Internet. The ease of access to...     

A Co-Existence Power Domain Non-Orthogonal Multiple Access Using Walsh-Hadamard and Pseudo-Noise Waveforms

Wireless Personal Communications - Non-orthogonal multiple access (NOMA) is one of the promising techniques anticipated in the upcoming wireless systems. This paper introduces a NOMA technique...     

Hybrid Data Aggregation Technique to Categorize the Web Users to Discover Knowledge About the Web Users

Wireless Personal Communications - Web usage mining is a knowledge discovery technique where a data analyst can discover useful information from the web users’ data. Web contains billions of...     

Third order non-linear optical,diffractional, electrical,laser damage threshold,elemental and surface studies of l-methionine potassium hydrogen phthalate (LMKHP) single crystals

Journal of Materials Science: Materials in Electronics - In this study, semi-organic non-linear optical (NLO) crystal l-methionine potassium hydrogen phthalate (LMKHP) was prepared via the solvent...     

Enhanced Static Noise Margin and Increased Stability SRAM Cell with Emerging Device Memristor at 45-nm Technology

Very Large Scale Integrated (VLSI) technology has conquered a momentous transformation and adaption. The glory of achieving these platforms goes to aspect ratio shrinking. Not only the dimensions are scaling down, but the revolution is forcing the designers to switch all circuits from one device level to another emerging devices. In this conflict, memristors are capable of making their roots stronger in VLSI domain as compared to other emerging devices. In this paper it is presented the research of static noise margin, highlighting the new fidelity issue i.e. the noise that has great impact on retention voltage of SRAM cell and this effect in memristive cell is less as compared to conventional 7T SRAM cell. Simulations and results have been performed and obtained from 7T SRAM and memristive 7T SRAM cell at 45 nm technology. In this paper, impact of the cell and pull-up ratio with their comparisons is also discussed.     

A Versatile and Convenient Synthesis of 34S‐Labeled Phosphorothioate Oligonucleotides

A synthetic protocol for ³⁴S‐labeled phosphorothioate oligonucleotides (PS ONs) was developed to facilitate MS‐based assay analysis. This was enabled by a highly efficient, two‐step, one‐pot synthesis of ³⁴S‐labeled phenylacetyl disulfide (³⁴S‐PADS), starting from ³⁴S‐enriched elemental sulfur (³⁴S₈). ³⁴S‐PADS was subsequently used for stable isotope labeling (SIL) of oligonucleotides containing a phosphorothioate backbone. The ³⁴S‐SIL PS ONs are shown to retain the same melting temperature, antisense activity, and secondary structure as those of the corresponding unlabeled ³²S PS ONs.     

Algal buffer layers for enhancing the efficiency of anthocyanins extracted from rose petals for natural dye‐sensitized solar cell (DSSC)

Natural dye‐sensitized solar cells (DSSCs) are becoming promising candidates for replacing synthetic dyes. Anthocyanins, a flavonoid pigment which is responsible for the coloration in fruits and flowers, have shown productive results in employing them as natural dye for DSSC. But unfortunately, they exhibit low efficiency compared with synthetic dyes. Probing the reasons for the low efficiency of anthocyanin paves way for finding solution to increase the efficiency. This paper lists the important factors that are responsible for anthocyanin instability in DSSC. As a remedial measure, this paper introduces two buffer layer made of algal byproducts—sodium alginate and Spirulina. Rutile phase TiO₂ nanorods prepared by hydrothermal method were used as photoelectrode and are subsequently characterized by X ray diffraction, transmission electron microscopy, and optical studies. The use of sodium alginate above the photoelectrode has proved to improve the dye concentration in the film by introducing more hydroxyl groups on the surface of TiO₂. Anthocyanins extracted from rose petals using citric acid as solvent were used as dye for DSSC. Prior to the sensitization process with anthocyanin dye, the TiO₂ film (with sodium alginate) was sensitized with Spirulina. The chlorophylls, xanthophylls, phycocyanins, and amino acids present in Spirulina assist the anthocyanins to bond with TiO₂ efficiently. This helps in enhancing the efficiency of anthocyanins of rose dye from 0.99% to 1.47%.     

The relationship between stressors and creativity: A meta-analysis examining competing theoretical models.

Competing theoretical models and equivocal evidence leave unanswered questions regarding stressors’ effect on creativity. The present meta-analysis of 76 experimental studies (including 82 independent samples) aims to clarify this association and identify factors that may explain differences between studies. Our results suggest that the effect of stressors on creative performance depends on how stress-inducing the stressor is and what type of stress is induced. We found a curvilinear relationship between evaluative stress and creativity such that low evaluative contexts increased creative performance over control conditions, whereas highly evaluative contexts decreased creative performance. We found a linearly negative relationship between uncontrollability and creativity such that more uncontrollability decreased creative performance. The results suggest that stressors’ effect on creativity is more complex than previously assumed and points to the need for understanding boundary conditions that shed light on inconsistent findings. (PsycINFO Database Record (c) 2010 APA, all rights reserved)