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A Review : Black Hole & Gray Hole Attack in MANET
Sweta Dixit,Krishna Kumar Joshi,Neelam Joshi 보안공학연구지원센터 2015 International Journal of Future Generation Communi Vol.8 No.4
In past few years, mobile ad hoc network has gaining more attention of researchers. Mobile Adhoc Network (MANET) are most widely used all over the world, due to its ability to communicate each other without the use of any fixed network. It applications used in military network, disaster relief operations and also in commercial environments. Due to open, dynamic and infrastructure-less nature, the ad hoc networks are vulnerable to various attacks. The black hole and grayhole attack is one of them in MANET. Security is an necessary requirement in MANET. Without any proper security solution, the malicious node in the network will act as a normal node which causes eaves dropping and selective forwarding attack generally known as Gray Hole attack. In this paper we survey on MANET applications, routing protocols, different types of attacks and also the review of researchers.
A Novel Approach Of Trust Based Routing To Select Trusted Location In AODV Based VANET : A Survey
Kumud Dixit,Krishna Kumar Joshi,Neelam Joshi 보안공학연구지원센터 2015 International Journal of Hybrid Information Techno Vol.8 No.7
During the last few years, a vehicular ad hoc network (VANETs) was extensively focused by researchers. A vehicular ad hoc network (VANETs) is a subclass of Mobile ad hoc networks builds to make sure the safety of traffic. VANET is a type of mobile peer to peer network, although it exhibits some different characters (fast moving, short lived connection etc). VANET is different from MANET due to large scale networks, higher mobility of nodes, geographically constrained topology and frequent network partitioning. In this paper, we present a survey on trust based routing in AODV based VANET to find secure location. In this first discussed about VANETs, their applications, characteristics, attacks, routing protocols and present a review of various researchers on trust based VANET.
Ex-situ conservation and cytotoxic activity assessment of native medicinal orchid: Coelogyne stricta
Thapa, Bir Bahadur,Thakuri, Laxmi Sen,Joshi, Pusp Raj,Chand, Krishna,Rajbahak, Sabari,Sah, Anil Kumar,Shrestha, Resha,Paudel, Mukti Ram,Park, So Young,Pant, Bijaya The Korean Society of Plant Biotechnology 2020 JOURNAL OF PLANT BIOTECHNOLOGY Vol.47 No.4
Ex-situ conservation of the ornamental and medicinal orchid, Coelogyne stricta, was performed by mass propagation using seed culture. Propagation stages were optimized using full- and half-strength solidified MS medium with different phytohormones. Maximum seed germination (88 ± 0.5% over 6 weeks of culture) was achieved on half-strength MS medium supplemented with 15% coconut water. Maximum shoot numbers were found on full-strength MS medium supplemented with 1 mg/L BAP, 2 mg/L Kinetin, and 10% coconut water, while the longest root was developed on full-strength MS medium with 1.5 mg/L IBA. A 2:1:1 combination of coco-peat, pine bark, and sphagnum moss was found to be a suitable potting mixture resulting in 80% seedling survivability. The cytotoxic activity of extracts of both wild plants and in vitro-developed protocorms was determined using an MTT (3-(4, 5-dimethylthiazol-2-yl)-2, 5-diphenyltetrazolium bromide) assay on a cervical cancer cell line. The wild plant extract inhibited the growth of 41.99% of cells, showing that this extract has moderate cytotoxic activity toward cervical cancer cells.