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Sasikala, G.
- Effect of Reiki Therapy on Biophysiological and Psychological Status of Patients after Major Surgical Procedures: A Pilot Report
Authors
1 Sri Ramachandra University, Porur, Chennai, IN
Source
Indian Journal of Health and Wellbeing, Vol 4, No 5 (2013), Pagination: 1011-1017Abstract
The main aim of the study is to assess the effect of reiki therapy on biophysiological and psychological status of patients after major surgical procedures. The study was conducted at a private hospital, Tamilnadu. State Trait Anxiety Inventory (STAI), Center for epidemiological studies Depression (CES-D) and visual analogue scales were used for this study. There was a significant difference in the mean score of the biophysiological parameter in study and the control groups. Highly significant differences were observed between pretest and posttest scores of anxiety and depression in reiki group. Reiki therapy had a positive impact on the vital signs, anxiety and depression among patients subjected to major surgical procedures.Keywords
Reiki Therapy, Biophysiological and Psychological Status, Patients, Surgery.
- Physical Properties of Glass-Hemp-Banana Hybrid Fiber Reinforced Polymer Composites
Authors
1 Department of Mechanical Engineering, Sri Sai Ram Engineering College, Chennai - 600044, Tamil Nadu, IN
2 Department of Mechanical Engineering, KPR Institute of Engineering and Technology, Coimbatore - 641407, Tamil Nadu, IN
3 Department of Mathematics, Valliammai Engineering College, Chennai - 603203, Tamil Nadu, IN
4 Department of Computer Science and Engineering, Faculty of Computing, Sathyabama University, Chennai - 600119, Tamil Nadu, IN
Source
Indian Journal of Science and Technology, Vol 10, No 7 (2017), Pagination:Abstract
Background/Objectives: In this experimental work the effect of mechanical properties on incorporation of glass fibre with treated banana-hemp fibres has been studied. Methods/Statistical analysis: Banana and hemp fibres are extracted by enzymatic processes for successfully removing lignin. The alkaline solution was used to treat the fibres since it is increases their mechanical strength. The banana, hemp and glass fibres were reinforced with the epoxy matrix and the hybrid composites were fabricated by using hand layup process. Alternative orientations of fibres were used for the fabrication of the laminates in order to improve their strength. Findings: As per the ASTM standards, test specimens were prepared from the laminates with the stacking sequence of glass/banana fibre, glass/hemp fibre and glass/banana/hemp fibre. The mechanical characteristics were obtained by impact test, tensile test and flexural test for the fabricated samples. The interfacial analysis was conducted using scanning electron microscope to estimate voids, fractures and fibre pull out. The experimental result shows that the glass/banana/hemp fibre composite exhibits maximum tensile strength than the other two combinations. The hemp-glass fibre composite holds the maximum flexural strength followed by glass/hemp/banana fibre composites. The glass/banana fibre composites hold maximum impact energy and the value of the composites varies from 7.33 to 9.33 Joules. Application/Improvements: These composites are performing well in all kind of mechanical loadings. It is suggested that these materials can be used in the relevant fields.Keywords
Alkaline Treatment, Banana Fiber, Hemp Fiber, Mechanical Properties, SEM Analysis.Full Text
- Microstructural Characteristics and Mechanical Properties of Dissimilar Joints of Aisi 316LN Austenitic Stainless Steel and Modified 9Cr-1Mo Steel
Authors
1 Centre for Materials Joining and Research, Department of Manufacturing Engineering, Annamalai University, Annamalai Nagar - 608 002, Tamil Nadu, IN
2 Centre for Materials Joining and Research, Department of Manufacturing Engineering, Annamalai University, Annamalai Nagar – 608 002, Tamil Nadu, IN
3 Centre for Materials Joining and Research, Department of Manufacturing Engineering, Annamalai University, Annamalai Nagar – 608 002, Tamil Nadu, IN
4 Homi Bhabha National Institute, Indira Gandhi Centre for Atomic Research, Kalpakkam - 603 102, Tamil Nadu, IN
Source
Indian Welding Journal, Vol 50, No 4 (2017), Pagination: 36-49Abstract
In liquid metal cooled fast breeder reactors, the dissimilar joint between grade 91 ferritic steel and 316LN stainless steel is frequently encountered. For better integrity assessment, mechanical properties of each region need be evaluated. In the present investigation, dissimilar joints between grade 91 to 316LN SS were fabricated by shielded metal arc welding process using nickel based electrodes. Mechanical properties (Tensile and impact toughness) of different regions were evaluated by placing the notch at each location. Microhardness variation across the dissimilar joint was recorded. Microstructural analyses of various regions were done by optical and scanning electron microscopy. From this investigation, it is understood that the in-homogeneous mechanical properties were observed across the dissimilar joint. The development of complex microstructure at the fusion interfaces will alter the mechanical properties across the dissimilar joint.Keywords
Welding, Dissimilar Joint, Mechanical Properties, Microstructure, Microhardness.References
- Karthick K, Malarvizhi S, Balasubramanian V, Krishnan SA, Sasikala G and Albert SK (2017); Tensile properties of shielded metal arc welded dissimilar joints of nuclear grade ferritic steel and austenitic stainless steel, Journal of the Mechanical Behavior of Materials, 25(5-6), pp.171178.
- Teemu S, Matias A, Roman M, Pekka N, Päivi KR, Ulla E and Hannu H (2016); Microstructural, mechanical, and fracture mechanical characterization of SA 508-Alloy 182 dissimilar metal weld in view of mismatch state, International Journal of Pressure Vessels and Piping, 145, pp.13-22.
- Jang C, Lee J, Sung KJ and Eun JT (2008); Mechanical property variation within inconel 82/182 dissimilar metal weld between low alloy steel and 316 stainless steel, International Journal of Pressure Vessels Piping, 85(9), pp.635-646.
- Kim JW, Lee K, Kim JS and Byun TS (2009); Local mechanical properties of alloy 82/182 dissimilar weld joint between SA508 Gr.1a and F316 SS at RT and 320°C, Journal of Nuclear Materials, 384(3), pp. 212-221.
- Pandey S, Prasad R, Singh PK and Rathod DW (2014); Investigation on dissimilar metal welds of SA312 type 304LN pipe (extruded) and SA508Gr.3Cl.1 pipe (forged), Bhabha Atomic Research Centre, Mumbai, India, Report No. 2008/36/107-BRNS/4038A.
- Zhang ZL, Hauge M, Thaulowa C and Ødegård J (2009); A notched cross weld tensile testing method for determining true stress-strain curves for weldments, Engineering Fracture Mechanics, 69(3), pp.353-366.
- Wendell B, Jones CR, Hills D and Polonis H (1991); Microstructural evolution of modified 9Cr-1Mo steel, Metallurgical Transactions A, 22, pp.1049-1058.
- Wang HT, Wang GZ, Xuan FZ, Liu CJ, Tu ST (2014) Local mechanical properties of a dissimilar metal welded joint in nuclear power systems, Materials Science and Engineering: A, 568, pp.108-117.
- Rathod DW, Pandey S, Singh PK and Prasad R (2015); Mechanical properties variations and comparative analysis of dissimilar metal pipe welds in pressure vessel system of nuclear plants, Transactions of the ASME, Journal of Pressure Vessel Technology, 138(1), pp. 011403-011409.
- IGCAR, Prototype fast breeder reactor specification for the qualification of the welding consumables, Indira Gandhi Centre for Atomic Research, Kalpakkam, India, Report No. PFBR/32040/SP/1002/R-0.
- RAAC: Robust and Auditable Access Control with Multiple Attribute Authorities for Public Cloud Storage
Authors
Source
Automation and Autonomous Systems, Vol 10, No 8 (2018), Pagination: 156-159Abstract
Data access control is a challenging issue in public cloud storage systems. Ciphertext-Policy Attribute-Based En- cryption (CP-ABE) has been adopted as a promising technique to provide flexible, fine-grained and secure data access control for cloud storage with honest-but-curious cloud servers. However, in the existing CP-ABE schemes, the single attribute authority must execute the time-consuming user legitimacy verification and secret key distribution, and hence it results in a single-point performance bottleneck when a CP-ABE scheme is adopted in a large-scale cloud storage system. Users may be stuck in the waiting queue for a long period to obtain their secret keys, thereby resulting in low-efficiency of the system. Although multi- authority access control schemes have been proposed, these schemes still cannot overcome the drawbacks of single-point bottleneck and low efficiency, due to the fact that each of the authorities still independently manages a disjoint attribute set.
In this paper, we propose a novel heterogeneous framework to remove the problem of single-point performance bottleneck and provide a more efficient access control scheme with an auditing mechanism. Our framework employs multiple attribute authorities to share the load of user legitimacy verification. Meanwhile, in our scheme, a CA (Central Authority) is introduced to generate secret keys for legitimacy verified users. Unlike other multi- authority access control schemes, each of the authorities in our scheme manages the whole attribute set individually. To enhance security, we also propose an auditing mechanism to detect which AA (Attribute Authority) has incorrectly or maliciously performed the legitimacy verification procedure. Analysis shows that our system not only guarantees the security requirements but also makes great performance improvement on key generation.
- A Scheme for the Exchange of Secure and Lightweight Data for Mobile Computing in the Cloud
Authors
Source
Fuzzy Systems, Vol 10, No 8 (2018), Pagination: 188-193Abstract
Mobile gadgets can store or recover individual information from whenever at anyplace with the ubiquity of distributed computing. Therefore, the security of information issue in portable cloud turns out to be increasingly uncompromising and it avoids promote improvement of versatile distributed computing. There are huge investigations ‘that have been’ directed to expand the cloud security. However, the greater part of them are not relevant for versatile cloud since cell phones just have restricted power and figuring assets. Arrangements with low computational over head are in extraordinary requirement for versatile cloud applications. In this paper, we propose a lightweight information sharing plan for portable distributed computing. It take after CPABE an entrance control innovation utilized as a part of typical cloud condition, however changes the structure of access control tree to make it reasonable for portable cloud situations. LDSS moves a vast segment of the computational escalated get to control tree change in CPABE from cell phones to outside intermediary servers. In addition, to decrease the client denial cost, it acquaints characteristic portrayal fields with execute sluggish repudiation, which is a prickly issue in program based CPABE frameworks. The trial comes about demonstrate that LDSS can enough decrease the overhead on the cell phone side when clients are sharing information in the portable cloud situations.