Design and Implementation of a Secure Communication Protocol

The main object of this paper is to present a mutual authentication protocol that guarantees security, integrity and authenticity of messages, transferred over a network system. In this paper a symmetric key cryptosystem, that satisfies all the above requirements, is developed using theorems of J.R. Chen, I.M. Vinogradov and Fermat and the decimal expansion of an irrational number

Image sharing privacy policy on social networks using A3P

User Image sharing social site maintaining privacy has become a major problem, as demonstrated by a recent wave of publicized incidents where users inadvertently shared personal information. In light of these incidents, the need of tools to help users control access to their shared content is apparent. Toward addressing this need an Adaptive Privacy Policy Prediction (A3P) system to help users compose privacy settings for their images. The solution relies on an image classification framework for image categories which may be associated with similar policies and on a policy prediction algorithm to automatically generate a policy for each newly uploaded image, also according to user’s social features. Image Sharing takes place both among previously established groups of known people or social circles and also increasingly with people outside the users social circles, for purposes of social discovery-to help them identify new peers and learn about peers interests and social surroundings, Sharing images within online content sharing sites, therefore, may quickly lead to unwanted disclosure. The aggregated information can result in unexpected exposure of one’s social environment and lead to abuse of one’s personal information

Parallel network file systems using authenticated key exchange protocols

The keyestablishment for secure many-to-many communications is very important nowadays. The problem is inspired by the proliferation of large-scale distributed file systems supporting parallel access to multiple storage devices. In this, a variety of authenticated key exchange protocols that are designed to address the issues. This shows that these protocols are capable of reducing the workload of the metadata server and concurrently supporting forward secrecy and escrow-freeness. All this requires only a small fraction of increased computation overhead at the client. This proposed three authenticated key exchange protocols for parallel network file system (pNFS). The protocols offer three appealing advantages over the existing Kerberos-based protocol. First, the metadata server executing these protocols has much lower workload than that of the Kerberos-based approach. Second, two of these protocols provide forward secrecy: one is partially forward secure (with respect to multiple sessions within a time period), while the other is fully forward secure (with respect to a session). Third, designed a protocol which not only provides forward secrecy, but is also escrow-free

Dynamic analysis of towing operation with military tracked recovery vehicle

The present work is focused upon development of multi-body dynamic (MBD) models of a military tracked recovery and towed vehicles in Adams Tracked Vehicle (ATV) toolkit, and carrying out the dynamic analysis of towing operation with the vehicles. Towing is one of the important recovery operations for the military recovery vehicle, which is generally carried out on plain terrain conditions. However, it is also desired to tow another vehicle of similar weight class over certain gradients as well. In this regard, it is required to assess the structural rigidity of the tow bar assembly, while negotiating the gradients. The finite element models of the tow bars have been developed in Abaqus/CAE, from which the modal information is extracted. The finite element models of the tow bars have been integrated with the MBD model of the recovery and towed vehicles in ATV through Adams/Flex. The dynamic analyses of towing operation with the existing tow bar assembly, have been carried out over different gradients, based on which required design modifications have been proposed to minimize the relative angular motion between the tow bars while descending the gradient. With an objective of further weight reduction and enhanced gradient climbing capability, suitable recommendations have further been provided to modify the tow bar assembly design. Dynamic simulations were carried out with the modified tow bar assembly design, through which higher gradients could be negotiated with reduced tow bar assembly weight. The above dynamic analyses have provided a base platform for arriving at the standard operating procedure of carrying out the towing operation in practice. The analyses have also established a framework for future design of tow bar assemblies under the influence of a three dimensional vehicle dynamic environment

Insilico interaction analysis of herbal bioactive molecules with Penicillin binding protein in staphylococcus aureus

Staphylococcus aureus is an opportunistic bacterial pathogen associated with asymptomatic colonization of the skin and mucosal surfaces of normal humans. Staphylococcus aureus isolates are often multidrug resistant. Antibiotics resistant Staphylococcus aureus is an emerging concern in the medical field. Due to their increasing resistance to numerous antibiotics, screening for alternate compound is required. Penicillin binding protein (PBP) was considered as an essential drug target for inhibiting bacterial growth. Molecular docking studies were performed to identify the lead molecule against Penicillin binding protein. Interaction of PBP with the plant derived compounds indicates the effective interaction of rosmarinic acid with highest fitness score and maximum number of hydrogen bonds (h-bonds). The study concludes that rosmarinic acid may be effective as an inhibitor for PBP and hence, can be regarded as a potential drug candidate for treating β-lactam resistant Staphylococcus aureu

Large sized oilfish Ruvettus pretiosus (Cocco, 1833) ever recorded from Gulf of Mannar, south-east coast of India

Ruvettus pretiosus belonging to the Family Gempylidae of perciform fishes is closely related to Scombridae. Gempylidae fishes are commonly called as snake mackerels or escolars and this family has 16 genus and 24 valid species. R. pretiosus is one of the large sized fishes with the maximum record of 300 cm total length (Nakamura and Parin, 1993). It is bentho-pelagic, reported to be distributed along the tropical and temperate seas of the world

CO2 sequestration: microalgae genome analysis and its application of effective green source technology

Microalgae genome technology for CO2 sequestration is an appropriate vehicle for articulating the importance of the current need and solution for reduction of CO2 at the atmospheric level. In comparison with C4 plants, microalgae have greater capability to fix atmospheric CO2.The rate of CO2 fixation differs in different strains of microalgae. The photosynthetic enzyme RuBisCO is widely responsible for photosynthetic carbon assimilation in all plants including phototrophic algae.The gene rbcL encodes this enzyme. The catalytic activity of carbonic anhydrase achieves the CO2 generation in the RuBisCO. CAH3 gene is essential for generating CO2 concentration for RuBisCO by dehydration of accumulated inorganic carbon. There are also few other microalgae genes which involves for carbon assimilation. Genomic resource databases and several other nucleotide databases are being used for sequencing the microalgal genomes. Even though, recent advances in genomic studies are providing thrust to enhance the research on microalgal species, they are expensive and resources available for microalgal genomic studies are limited. This review article attempts first as a combined revise on microalgae CO2 sequestration in the field of basic science, applied aspects, and the role of specific gene(s) in the algal system is well defined which could be a supportive involvement of carbon dioxide reduction as “Green-Gene Technology”. This Green biotechnology could be used for Global warming reduction as well as creating wealth from the waste through valuable by-products from the selected microalgae strains in future

Antimicrobial and DPPH Free Radical- Scavenging Activities of the Ethanol Extract of Propolis Collected from India

Propolis is a natural product derived from plant resins collected by honey bees. In the present study, ethanolic extract of Propolis (EEP) collected from South India were tested for their antibacterial, antifungal and antioxidative activities. Propolis from Apis mellifera and Trigona sp were collected and compared with the commercial Propolis. EEP from Apis mellifera and commercial Propolis showed higher activity against Staphylococcus aureus and Trigona sp EEP showed higher activity against Candida albicans than commercial. In addition, the total flavanoid and total polyphenol content were analyzed. The chemical compositions of Propolis were identified from Gas Chromatography and Mass Spectrum (GC-MS). The compound 1,4 Di-O-Acetyl-2,3,5-tri-O-Methylribitol (C12H22O7) was found to be first time in the propolis and the rest of the identified compounds were already reported. The results confirms the high DPPH free radical scavenging activity of Indian propolis. Thus Indian propolis, being a rich source of natural antioxidants, may be used in the prevention of various free radicals related diseases

Occurrence of Parascolopsis eriomma (Jordan and Richardson, 1909) and P. aspinosa (Rao & Rao 1981) from Tuticorin coast

The family Nemipteridae has five genera and 69 valid species. The dwarf monocle bream belonging to the genus Parascolopsis has 12 species. They are small, bottom-living fishes usually occurring in moderately deep water on outer shelf and continental slope waters throughout tropical and sub-tropical waters of Indo-West Pacific, ranging from Western Indian Ocean to North East Australia, South Japan and Delaga Bay on the coast of East Africa. The present report on Rosy dwarf monocle bream, Parascolopsis eriomma from Tuticorin coast is evidently a range extension from the known distribution areas

Characterization of Calcium Phosphate Chitosan Nanocomposite as Plant Growth Promoter

In this study, calcium phosphate-chitosan nanocomposite (CaP-CS NC) was prepared by a convenient and affordable co-precipitation method, and the prepared NC was tested for agriculture application.  Physico-chemicals analyses of the CaP-CS NC were conducted by X-ray diffraction (XRD), scanning electron microscope with energy dispersive X-ray spectroscopy (SEM-EDS), Fourier transform infrared spectroscopy (FTIR), and ultraviolet-visible spectroscopy (UV-Vis) instruments to determine the structural characteristics, surface topology, chemical composition, function group, and optical properties. The XRD pattern of CaP-CS NC revealed that the average crystallite size was 43 nm. The SEM images showed agglomeration of the CaP-CS NC with a rod-like shape. The EDS spectrum of the CaP-CS NC indicated the presence of Ca, P, O, and N elements. FTIR displayed vibrational peaks for the active functional group such as carboxylic (C=O), amines (N-H), hydroxyl (O-H), and alkyne (C-H). Furthermore, the spectrum of CaP-CS NC showed the bending mode of phosphates at 588.37 cm-1 and 508.45 cm-1. The UV-Vis-NIR spectrum of the prepared nanocomposite indicates the anti-reflection properties, which might be useful in solar cell applications to increase the efficiency of the solar cell. In addition, the prepared CaP-CS NC was tested for the plant growth stimulator properties at the lab scale level, wherein it exhibited substantial growth. Accordingly, the current study suggests that the prepared CaP-CS NC could be used as a plant growth promoter