PSG College of Technology

About: PSG College of Technology is a based out in . It is known for research contribution in the topics: Machining & Thin film. The organization has 3174 authors who have published 3575 publications receiving 40690 citations.

Fabrication and characterization of silk braided sutures

Abstract: Silk sutures are already used in surgery. Silk is a natural protein fiber and easily prone to microbial infection hence we have developed novel antimicrobial silk braided sutures. Braided silk sutures were fabricated using a circular braiding machine with a 16 carrier arrangement normally used to produce braided structures. The same structure was used to manufacture braids with three different take-up speed levels obtained by changing the cogwheel ratio on the braiding machine. The influence of braid angle, test parameters such as gauge length and extension rate on tenacity and knot strength of braided silk sutures were studied. Silk sutures fabricated at higher braid angle, tested at shorter gauge length and greater test speed showed lower values of tenacity and knot strength. Chitosan was applied on braided silk sutures to impart antimicrobial characteristics. The Scanning electron microscopy study reveals the absence and presence of chitosan on the surface of untreated and treated sutures respectively. The antimicrobial properties of chitosan and tetracycline hydrochloride drug were tested using Agar diffusion method SN 195920 both when applied independently and collectively on silk sutures against Escherichia coli and Staphylococcus aureus. The combined antimicrobial effect of chitosan and tetracycline hydrochloride drug is very good and can be used to develop antimicrobial silk sutures for providing protection against microbial infections.

A Survey on Successive Interference Cancellation Schemes in Non-Orthogonal Multiple Access for Future Radio Access

Abstract: The fifth generation (5G) of wireless communication accompanied by the advancement of mobile internet and the Internet of Things (IoT) will create stormy data traffic. The 5G challenges like higher spectral efficiency, massive connectivity, and low latency are addressed by the Non-Orthogonal Multiple Access (NOMA) in recent years. NOMA is proven to be a promising technique from its capability to accommodate a larger number of users in contrast to the conventional orthogonal multiple access (OMA) schemes. NOMA comprises two distinct techniques such as Power-Domain NOMA and Code-Domain NOMA. The non-orthogonal resource allocation in Power-Domain NOMA is practically realized by the Superposition Coding (SC) at the Base Station (BS) and an advanced Successive Interference Cancellation at the User Equipment (UE). In this manuscript, the basic concepts of NOMA, on comparing its channel gain with OMA are discussed first. Specifically, a comprehensive survey of various SIC techniques applied under perfect and imperfect Channel State Information (CSI) uncertainties are summarized in terms of outage probability, ergodic capacity, and system performance. In addition, the sophisticated SIC techniques, when NOMA is integrated with modern wireless communication technologies such as multiple-input multiple-output (MIMO-NOMA) and Cooperative (C-NOMA) communications are investigated. Furthermore, the challenges to be solved with their corresponding opportunities and future research directions of NOMA are explored.

Nondestructive health monitoring techniques for composite materials: A review:

Abstract: Structural health monitoring is the process of acquisition and analyzing technical data obtained from structures to determine the present condition of the structure and residual life. Composites ha...

A New Image Encryption Method Based on Knight's Travel Path and True Random Number

Abstract: Internet is an important part in the daily life of people in many ways, which allows the people in any corner of the world to share all types of information. Image encryption is used to transmit sensitive multimedia information in unsecured networks to provide high degree of confidentiality. In this paper, a new image encryption method is proposed based on novel implementation of pixel scan, utilizing the Knight’s Travel Path, and true random number. The Knight’s travel path is a pattern in which the path of a Knight around a chess board is taken without revisiting any node. This travel path pattern is used to permute the pixel positions of the original image to obtain the scrambled image. The scrambled image is further XORed with the random key numbers to get the cipher image. To change the pixel values of the scrambled image, true random numbers are generated from the amplitude values of a chosen noise audio file. Decryption is performed to confirm the reception of the sent image. The proposed method resists the statistical, differential, and entropy attacks significantly which have been demonstrated with various standard images.