Mapana Journal of Sciences

Distributed Denial of Services attacks on cloud servers: Detection, Analysis and Mitigation

sudesh pahal, Anjana Saroha — Thu, 19 Jan 2023 00:00:00 +0000

Today, most of the IT companies are moving towards Cloud infrastructure and technology due to its flexibility, scalability, and cost-effective features. But security is still the main hinderance to accept cloud computing on large scale. There are many security issues related to cloud implementation and one of the major threats is Distributed Denial of Services (DDoS) attack on cloud servers and applications. DDoS attack is a most prevailing security issue where attacker’s intention is to make all victim’s resources like cloud servers, storage, bandwidth etc. unavailable to general user which results to dissatisfactory outcomes in related business. This paper emphasis on understanding of DDoS attacks, their detection and analysis. The paper also explores the possible mitigation strategies to reduce the impact of DDoS.

a Comparative analysis of larvicidal efficacy of Silver and Copper nanoparticles synthesized leaf extract of Ocimum basilicum against Epilachna vigintioctopunctata

Chitharanjan Sundareswari, Sudarmani D.N.P, Jayadurkga S — Thu, 19 Jan 2023 00:00:00 +0000

Abstract: The present study was based on assessments of the larvicidal activities to determine the efficacy of synthesized silver and copper nanopartcils using aqueous leaf extract of Ocimum basilicum(OB) against larvae and adult Epilachna vigintioctopunctata. Larvae and adults were exposed to varying concentrations of aqueous extract, Silver and copper nanoparticles synthesized extract of O.basilicum for 24 hrs. AgNPs and CuNPs were synthesized using the leaf extract of O.basilicum and the formaton of nanoparticles was observed within 6h. Synthesis nanoparticles were confirmed by UV-vis spectrophotometer, Particle size analyzer and FTIR. The phytochemicals present in leaf extract were examined by GC-MS study. LC₅₀and LC₉₀values were calculated for larvicidal activity of aqueous leaf extract, AgNPs and CuNPs synthesized leaf extract of O.basilicum. Results were compared between larvicidal activity of aqueous extract, AgNPs and CuNPs synthesized leaf extract. CuNPs synthesized leaf extract showed slightly less larvicidal activity than AgNPs synthesized leaf extract.

Theoretical and Experimental Investigations of antibiotic agents Sulfamethoxazole (SMX) and Trimethoprim (TMP) by Density Functional Theory

Sat, 14 Jan 2023 00:00:00 +0000

In this manuscript, a complete theoretical and experimental investigation of antibiotic agents Sulfamethoxazole (SMX) and Trimethoprim (TMP) was performed using the Density Functional Theory (DFT) with B3LYP, CAM-B3LTP and B3PW91 levels of theory and 6-311++G(d,p) basis set. The geometrical parameters of SMX and TMP are computed and compared with literature data. The global reactivity descriptors are estimated from HOMO - LUMO energies to know the chemical reactivity and stability of titled molecules. The MEP study has been used to identify the better electrophilic sites in titled molecules. Mulliken charge analysis has been carried out at the different levels of theories. The NLO parameters are computed for both molecules to check their suitability for NLO applications. The NBO analysis has been used to disclose the most possible intensive intermolecular interactions. The assignment of vibrational spectra of titled molecules has been carried out using assistance of DFT coupled with the VEDA program.

Topologies Induced by Vertex Set of Graphs

Gnanachandra Paulraj, lalitha — Thu, 19 Jan 2023 00:00:00 +0000

In this paper, subbasis for different topologies on vertex set of a simple graph without isolated vertices is introduced. Some properties of these topologies are investigated. Interior, closure, exterior and boundary of a vertex induced subgraph were defined and some basic properties were studied.

Unsteady MHD Casson fluid flow past a semi-infinite vertical plate with thermal diffusion

V RAMANA REDDY JANKE — Thu, 19 Jan 2023 00:00:00 +0000

The process design engineers are concerned with efficient heat and mass transfer, in many engineering processes such as paper manufacturing, metal and polymer extrusion etc. Also, many industrial fluids are non-Newtonian. So, an attempt is made to discuss the unsteady MHD flow of a Casson fluid past a semi infinite vertical plate with thermal diffusion, radiation and heat absorption effects. Slip boundary constraints are also considered for this investigation. The governing partial differential equations are reduced into non-dimensional ordinary differential equations and solved analytically using perturbation technique. The effects of various non dimensional governing parameters on velocity, temperature and concentration fields along with the friction factor, local Nusselt and Sherwood numbers are discussed in detail and presented through graphs and tables. Moreover, it is seen that higher values of the Soret number enhance the velocity and concentration profiles. It is also observed that the Schmidt number have tendency to enhance the mass transfer rate and radiation parameter have tendency to increase the thermal boundary layer thickness. It is also observed that our results are in well agreement with earlier results.