Computational Analysis and Experimental Investigation of Optical Efficiency of Concentrating Photovoltaics equipped with a Secondary Optic Element

Base drag is arising from flow separation at blunt base of a body. It can be a sizeable fraction of total drag in context of projectiles, missiles and after bodies of fighter aircrafts. The base drag is the major contribution of total drag for low speed regimes, flight tests have shown that the base drag may account for up to 50% of total drag. In this paper an experimental investigation for simple semi-circular flight vehicle body of length 500mm and diameter 50mm was conducted for the purpose of investigating base drag. The base drags for three configurations are calculated and the results are compared with CFD data. The three configurations used for testing are flat base configuration, closed nozzle configuration and boat tail configuration. The evaluation of base drag for three different flow velocities such as (i) 20m/s, (ii) 35m/s and (iii) 50m/s at different angle of attack such as -2, 0 and 2 are experimented and compared.

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Experimental investigation of enzyme functional annotations reveals extensive annotation error

10.1101/2020.12.18.423474 ◽

2020 ◽

Author(s):

Elzbieta Rembeza ◽

Martin KM Engqvist

Keyword(s):

Experimental Investigation ◽

Computational Analysis ◽

Domain Architecture ◽

Functional Annotations ◽

Experimental Platform ◽

Alternative Activities ◽

Enzyme Class ◽

Industrial Relevance ◽

Predicted Function ◽

Over Time

Only a small fraction of genes deposited to databases has been experimentally characterised. The majority of proteins have their function assigned automatically, which can result in erroneous annotations. The reliability of current annotations in public databases is largely unknown; experimental attempts to validate the accuracy of existing annotations are lacking. In this study we performed an overview of functional annotations to the BRENDA enzyme database. We first applied a high-throughput experimental platform to verify functional annotations to an enzyme class of S-2-hydroxyacid oxidases (EC 1.1.3.15). We chose 122 representative sequences of the class and screened them for their predicted function. Based on the experimental results, predicted domain architecture and similarity to previously characterised S-2-hydroxyacid oxidases, we inferred that at least 78% of sequences in the enzyme class are misannotated. We experimentally confirmed four alternative activities among the misannotated sequences and showed that misannotation in the enzyme class increased over time. Finally, we performed a computational analysis of annotations to all enzyme classes in BRENDA database, and showed that nearly 18% of all sequences are annotated to an enzyme class while sharing no similarity to experimentally characterised representatives. We showed that even well-studied enzyme classes of industrial relevance are affected by the problem of functional misannotation.

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Computational analysis for selection of Diesel Oxidation Catalyst and experimental investigation to meet BS-III/IV emission norms as low cost solution for LCV applications

Frontiers in Automobile and Mechanical Engineering -2010 ◽

10.1109/fame.2010.5714806 ◽

2010 ◽

Cited By ~ 2

Author(s):

S Karthikeyan ◽

S Krishnan

Keyword(s):

Experimental Investigation ◽

Computational Analysis ◽

Low Cost ◽

Diesel Oxidation Catalyst ◽

Oxidation Catalyst ◽

Diesel Oxidation ◽

Selection Of

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Computational Analysis and Experimental Investigation of Impacts in Multibody Systems

IUTAM Symposium on Multiscale Problems in Multibody System Contacts - IUTAM Bookseries ◽

10.1007/978-1-4020-5981-0_24 ◽

2007 ◽

pp. 269-280

Author(s):

Robert Seifried ◽

Werner Schiehlen

Keyword(s):

Experimental Investigation ◽

Multibody Systems ◽

Computational Analysis

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Stress Intensity Factors and Paths for Cracks in Photoelastic Motor Grain Models Under Internal Pressure

10.1115/imece2001/pvp-25200 ◽

2001 ◽

Author(s):

C. W. Smith ◽

D. M. Constantinescu ◽

C. T. Liu

Keyword(s):

Stress Intensity Factor ◽

Experimental Investigation ◽

Stress Intensity ◽

Intensity Factor ◽

Computational Analysis ◽

Tensile Tests ◽

Small Radius ◽

Two Dimensional ◽

Intensity Factors ◽

Tip Radius

Abstract Computational analysis and two-dimensional tensile tests on single motor grain fins suggest that cracks in fin tips are most likely to originate at the coalescence of a fin end tip radius, with a small radius from the side of the fin. Some manufacturers have also noticed defects formed during casting at the fin tip on the fin axis. The following is an experimental investigation utilizing frozen stress photoelastic models of an existing motor grain geometry in order to clarify stress intensity factor (SIF) values and crack growth paths for cracks emanating from the two above-noted potential critical loci. Comparisons between results from cracks grown from the two loci will be made, suggesting interesting conclusions.

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Multi-mode light microscopy of microtubule assembly dynamics and chromosome movement in vivo and In vitro

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100166117 ◽

1996 ◽

Vol 54 ◽

pp. 730-731

Author(s):

E. D. Salmon ◽

J. C. Waters ◽

C. Waterman-Storer

Keyword(s):

Imaging System ◽

Ccd Camera ◽

Transmitted Light ◽

Microtubule Assembly ◽

Live Cells ◽

Optical Efficiency ◽

Multiple Band ◽

Multi Mode

We have developed a multi-mode digital imaging system which acquires images with a cooled CCD camera (Figure 1). A multiple band pass dichromatic mirror and robotically controlled filter wheels provide wavelength selection for epi-fluorescence. Shutters select illumination either by epi-fluorescence or by transmitted light for phase contrast or DIC. Many of our experiments involve investigations of spindle assembly dynamics and chromosome movements in live cells or unfixed reconstituted preparations in vitro in which photodamage and phototoxicity are major concerns. As a consequence, a major factor in the design was optical efficiency: achieving the highest image quality with the least number of illumination photons. This principle applies to both epi-fluorescence and transmitted light imaging modes. In living cells and extracts, microtubules are visualized using X-rhodamine labeled tubulin. Photoactivation of C2CF-fluorescein labeled tubulin is used to locally mark microtubules in studies of microtubule dynamics and translocation. Chromosomes are labeled with DAPI or Hoechst DNA intercalating dyes.

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