Thapar University

About: Thapar University is a education organization based out in Patiāla, Punjab, India. It is known for research contribution in the topics: Computer science & Cloud computing. The organization has 2944 authors who have published 8558 publications receiving 130392 citations.

Shoot organogenesis in elite clones of Eucalyptus tereticornis

Abstract: An efficient shoot organogenesis system has been developed from mature plants of selected elite clones of Eucalyptus tereticornis Sm. Cultures were established using nodal explants taken from freshly coppice shoots cultured on Murashige and Skoog medium containing 58 mM sucrose, 0.7% (w/v) agar (MS medium) and supplemented with 2.5 μM benzyladenine (BA) and 0.5 μM α-naphthaleneacetic acid (NAA). Shoot organogenesis was achieved from leaf segments taken from elongated microshoots on MS medium supplemented with 5.0 μM BA and 1.0 μM 2,4-dichlorophenoxyacetic acid (2,4-D). The addition of cefotaxime to the medium promoted shoot differentiation, whereas carbenicillin and cephalexin inhibited shoot differentiation. Maximum shoot bud organogenesis (44.6%) occurred in explants cultured on MS medium supplemented with 5.0 μM BA, 1.0 μM 2,4-D and 500 mg/l cefotaxime. Leaf maturity influenced shoot regeneration, with maximum shoot organogeneisis (40.5%) occurring when the source of explants was the fifth leaf (14–16 days old) from the top of microshoot. Shoot organogenic potential also varied amongst the different clones of E. tereticornis. Random amplified polymorphic DNA (RAPD) and inter-simple sequence repeat (ISSR) analyses indicated clonal uniformity of the newly formed shoots/plants, and these were also found to be true-to-type.

SAPDA: Secure Authentication with Protected Data Aggregation Scheme for Improving QoS in Scalable and Survivable UWSNs

Abstract: Security is one of the main objectives while designing protocols for underwater wireless sensor networks (UWSN), since the sensors in UWSN are vulnerable to malicious attack. So it becomes easy for opponents to manipulate the communication channel of UWSN and its nodes. Authentication and data integrity play important roles in the context of security to make network scalable and survivable. Hence in this paper, a secure authentication and protected data aggregation method for the cluster based structure of UWSN is proposed as because cluster based arrangement produces a concise and stable network. In this technique, the cluster head in each cluster is authenticated by the gateway to ensure that all the clusters are being handled by valid nodes. Also, the data being communicated in the network will be securely handled to ensure that it will not get compromised during network operations. In this way, the security of all the nodes is ensured to maintain safe network communication. The proposed technique improves the data reliability in the network by reducing the energy consumption and delay. Here, the proposed method is moreover compared with the state of the art techniques to prove the validity and effectiveness.

QoS-Aware Hierarchical Web Caching Scheme for Online Video Streaming Applications in Internet-Based Vehicular Ad Hoc Networks

Abstract: Many applications, such as intelligent transport system and mobile multimedia, use Internet-based vehicular ad hoc networks (IVANETs). In IVANETs, users often access multimedia content from anywhere using Internet connectivity to remote video streaming servers. Due to the high mobility of the nodes in IVANETs, however, maintaining quality of service (QoS) for these video streaming applications with respect to parameters such as jitter, throughput, buffering, and transmission delays is a challenging task. To address these challenges, we propose a new QoS-aware hierarchical web caching (QHWC) scheme in IVANETs. We propose two new metrics, namely, load utilization ratio (LUR) and query to connectivity ratio (QCR), to maintain the QoS for various video streaming applications in IVANETs. We compare the performance of our proposed QHWC scheme with past approaches, such as dynamic service, weighted segment, and machine learning based, using various parameters such as QCR, communication cost, query delay, cache hit ratio, query generation rate, invalidation cost, and cache update interval. Our results demonstrate that the proposed QHWC scheme yields an average decrease of 16.75% and 22% in communication cost and query relay, respectively, and an average increase of 9.31% in cache hit ratio. Moreover, the invalidation cost reduces by 26.26% (on average) in our proposed scheme compared with other schemes.