Moth Flame Optimization Method for Unified Power Quality Conditioner Allocation

This paper introduces a new optimization method to determine the optimal allocation of Unified Power Quality Conditioner (UPQC) in the distribution systems. UPQC is a versatile Custom Power Device (CPD) to solve problems related to voltage and current by the series and shunt compensator in the distribution systems. The task of UPQC highlighted in this paper is the required load reactive power is provided by both the series and shunt compensators. The UPQC’s steady state compensation capability has given a solution for providing reactive power compensation in large distribution systems. The optimization method adopted is Moth Flame Optimization (MFO). The best location and series compensator voltage are determined using MFO. The voltage injected by the series compensator and reactive power injected by the shunt compensator is incorporated in the load flow method. The effectiveness of the proposed method is validated with standard distribution systems

Secure Multilevel Data Authentication System in Cloud Environment

Dynamic Proof of Storage is a useful cryptographic primitive that enables a user to check the integrity of outsourced files and to efficiently update the files in a cloud server. Though researchers have planned several dynamic PoS schemes in single user environments, the matter in multi-user environments has not been investigated sufficiently. A sensible multi-user cloud storage system wants the secure client-side cross-user de-duplication technique, that permits a user to skip the uploading method and procure the possession of the files now, once alternative house owners of an equivalent files have uploaded them to the cloud server. To the simplest of our data, none of the present dynamic PoS will support this system. during this paper, we have a tendency to introduce the conception of de-duplicatable dynamic proof of storage associated propose an economical construction referred to as DeyPoS, to realize dynamic PoS and secure cross-user duplication, at the same time. Considering the challenges of structure diversity and personal tag generation, we have a tendency to exploit a unique tool referred to as Homomorphic Authenticated Tree (HAT). We have a tendency to prove the protection of our construction, and therefore the theoretical analysis and experimental results show that our construction is economical in follow

Stability of binary complexes of Pb(II), Cd(II) and Hg(II) with maleic acid in TX100-water mixtures

Binary complexes of maleic acid with toxic metal ions such as Pb(II), Cd(II) and Hg(II) have been studied in 0.0-2.5% v/v tritonX-100 (TX100) - water media at 303 K  at an ionic strength of 0.16 M. The active forms of the ligand are LH2, LH- and L2-. The derived ‘best fit’ chemical speciation models are based on crystallographic R-factors, χ2 and Skewness and Kurtosis factors. The predominant species formed are of the type ML2, ML2H and ML3. The trend in variation of complex stability constants with change in the mole fraction of the medium is explained on the basis of prevailing electrostatic and non-electrostatic forces. The species distribution as a function of pH at different compositions of TX100-water mixtures and plausible speciation equilibria are presented and discussed. KEY WORDS: Maleic acid, TritonX-100, Toxic metal ions, Mole fraction, Binary complexes Bull. Chem. Soc. Ethiop. 2014, 28(3), 383-391.DOI: http://dx.doi.org/10.4314/bcse.v28i3.

Investigation of Bioactive Compounds of Capsicum Frutescence and Annona Muricata by Chromatographic Techniques

Botanicals and herbal preparations for medicinal usage contain various types of bioactive compounds. The focus of this paper is on the analytical methodologies, which include the extraction, characterization of active ingredients in Capsicum frutescens fruits and Annona muricata L. leaves. Capsicum frutescens used for various problems with digestion including upset for conditions of the heart and blood vessels including poor circulation, excessive blood clotting, high cholesterol, and preventing heart disease. Whereas Annona muricata L. leaves are traditionally used to treat diabetes. People have been consuming raw leaves of Annona muricata L. to control blood glucose levels. The present investigation was designed to study the phytochemical profiling and bioactive component principles of Capsicum frutescens and Annona muricata by Thin layer Chromatography. Bio autography agar overlay test was done to detect the antimicrobial activity of the extracts. The results of this study confirmed the presence of various bioactive compounds in the acetone and methanol extracts of both the plants. The chromatographic analysis revealed that Capsicum frutescens fruit extract and Annona muricata leaf extract are composed of various Alkaloids, Terpenoids, Saponins, and Phenolics which are accountable for many biological activities. Bio autography assays shows that Capsicum frutescens shows growth inhibition against bacteria, but Annona muricata does not shown any significant activity. The findings of present study implies that both extracts are potent source for some medicinally important phytochemicals with antioxidant and antibacterial activities. Keywords: Phytochemicals; Thin Layer Chromatography; Bio autography

Evaluation of antioxidant potential of Capsicum frutescens

Capsicum frutescens has been known to contain a high level of antioxidant components. We investigated antioxidant activities in various solvent extracts from C. frutescens. The aim of this study is to evaluate invitro antioxidant activity of acetone, carbinol, hot water and hexane extracts of Capsicum frutescens.  Preliminary analysis revealed that all the four extracts responded positively for all the phytoconstituents. Acetone extract showed the strongest phenolic and tannin content; showed highest activity for FRAP, ABTS, Superoxide Radical and Hydroxyl Radical Scavenging Activity.  The present study explored that Capsicum frutescens has efficient antioxidant activity and could act as safe and cost-effective with potential biological applications. Keywords: Capsicum frutescens, Antioxidant, Free radical scavengers, ABTS, FRA

Application of Acoustic Emission to Study Debond Growth in Co-cured/Co-bonded Composite Structures under Fatigue Loading

Increasing use of fibre-reinforced composite materials for primary and secondary components in aircraft construction has resulted in the development of lightweight and efficient structures. The major emphasis is now towards realization of such structures at reduced cost. In order to achieve this, newer concepts in design and manufacturing of structural composites are being explored. One such concept is to make components with integral construction through co-curing and co-bonding. Through this approach, one can integrate a number of sub-components to realize assemblies in a single cure. Adhesive bonding is one of the most widely used processes for joining two structural members. Adhesive bonding is preferred to mechanical fastening in view of the better structural stiffness that can be achieved. However, the quality of bonding depends on a number of parameters and is very sensitive to the quality of the bonding surfaces. In view of this, it may be extremely difficult and impractical to expect the same degree of bond quality over the bonded region, especially with large aircraft structural components. Hence, we invariably end up with variations in the bond quality. There is a concern from the designers as well as the certifying agencies with regard to these bond quality variations on its long-tem structural performance. With this background, Advanced Composites Division, NAL, has projected a test programme to understand how the structure with inherent good bonds, poor bonds and debonds would behave and to what extent the presence of defects would reflect on the structural integrity. It is essential that the growth of debonds, debond initiation at poorly bonded regions are monitored in real-time to assess the structural integrity. Among the conventional Non-destructive Evaluation (NDE) techniques, Acoustic Emission (AE) is probably the only technique that would provide this information. In this paper, we describe the application of AE technique to monitor defect initiation and growth of debonds during fatigue cycling in co-cured/co-bonded structural components such as flaps for a civilian aircraft. This provides useful information towards establishing damage tolerance of a co-cured/co-bonded composite structure

Structural static testing of LCA rudder

Structural static strength test was conducted on the CFRP Composite Co-cured rudder for LCA, to demonstrate the structural integrity of the rudder and to experimentally determine the deflections and strains at selected locations and to correlate the test values with those obtained by theoretical analysis. The rudder was loaded upto the limit load (2614.0 kgs) and a limit reaction load (652.2 kgs) was also simultaneously applied. The load Vs deflection / strain behaviour was obtained. The rudder successfully withstood the limit load without any failure and the corresponding maximum tip deflection was 37.16 mm. The maximum strain recorded was 1998 micro strain on the shear web of the front spar of the rudder. The torque monitored on the link rod was 3874.20 N-m and the applied torque was 3675.17 N-m. Both the deflections and strains were well within design requirements. It was therefore concluded that the structural behaviour of the rudder is satisfactory and it was cleared for flight trials. This report deals with the results of the static testing of the rudder