A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All
Padmavathi, S.
- Enhancing Privacy and Reducing Traffic Levels in Vehicular Ad-Hoc Networks
Authors
1 Angel College of Engineering and Technology, Tripur, IN
Source
Networking and Communication Engineering, Vol 4, No 14 (2012), Pagination: 905-909Abstract
Vehicular Ad Hoc Networks is a kind of special wireless ad hoc network, which has the characteristics of high node mobility and fast topology changes. The Vehicular Networks can provide wide variety of services, ranges from safety and crash avoidance to internet access and multimedia applications. Attacking and misusing such network could cause destructive consequences. It is therefore necessary to integrate security requirements into the design of VANETs and defend VANET systems against misbehaviour, in order to ensure correct and smooth operations of the network. In this paper, we propose a security system for VANETs to achieve privacy desired by vehicles and traceability required by law enforcement authorities, in addition to satisfying fundamental security requirements including authentication, nonrepudiation, message integrity, and confidentiality. Moreover, we propose a privacy-preserving defense technique for network authorities to handle misbehaviour in VANET access, considering the challenge that privacy provides avenue for misbehaviour. The proposed system employs an identity based cryptosystem where certificates are not needed for authentication. We show the fulfilment and feasibility of our system with respect to the security goals and efficiency.- Vision based Vehicle Counting for Traffic Congestion Analysis during Night Time
Authors
1 Computer Science, Amrita University, Coimbatore - 641112, Tamil Nadu, IN
Source
Indian Journal of Science and Technology, Vol 9, No 20 (2016), Pagination:Abstract
Background/Objectives: To create an automated system that controls the traffic signals effectively based on the instantaneous calculation of traffic congestion during the given time using image processing techniques. Methods/ Statistical Analysis: Vision based Congestion analysis is done based on the vehicles counted from the camera fixed on the signal post. In this paper, the vehicles are detected based on head lights and counted as two wheelers or four wheelers. The congestion is categorized into light, medium and heavy based on this count. Findings: The headlights are separated from the illuminated bright spots by considering its circular and elliptical nature. The accuracy of identifying four wheelers depend on the pairing of the head lights. The existing pairing algorithm fails when one head light is hidden by other vehicles. In this paper, a simple pairing algorithm based on the spatial adjacency is experimented. This had less accuracy due to pairing of two wheeler head lights with that of four wheelers. The problem is alleviated by considering a varying scale factor proportional to the perspective projection of the vehicles in the line of sight. The accuracy of counting increased to 98%, where the drop is due to non-elliptical blobs of head lights that were not detected. Improvements: To guarantee the robust performance of the system, particularly the accuracy and the real-time processing speed. Limitation: The presence of fog lights in modern 4 wheelers are detected as separate cars which reduces the accuracy. The area of improvement will be to consider them as fog lights of the same car and not to mark them as a separate 4 wheelers.Keywords
Head Light Pairing Algorithm, Night Time Traffic Analysis, Traffic Congestion Analysis, Vehicle Counting, Vehicle Detection, Vision based Traffic Analysis.- Melittopalynological Analysis of Apis Dorsata Honey of Kotagiri Slopes, Nilgiris, Tamil Nadu
Authors
Source
International Journal of Innovative Research and Development, Vol 3, No 1 (2014), Pagination:Abstract
Kotagiri is one of the important honey producing zones in the Nilgiris (Anonymous, 2001). Honey collection from Apis dorsata hives is an income generation activity for the honey hunters of this region. The present work involves analysis of Apis dorsata honey from the forest of Kotagiri slopes in the Nilgiris with a view to know the pollen and nectar sources for the bees. As part of the investigation, 18 honey samples were collected from the honey hunters during the honey harvest season in June-July, 2011. The samples were acetolysed. A total of 10 pollen types were present in the honey sample studied. The present study indicates the importance of Syzygium cuminii and Pterolobium hexapetalum as a major source of forage to the bees. Efforts to enhance the cultivation of these species can be suggested. Syzygium cumini yield edible fruits and also help in the development of bee keeping and forest honey production in the region.
Keywords
Kotagiri, Apis dorata , Kotagiri, pollen, species cultivation- Tailor-Made Educational Model Realizing Intended Learning Outcome to Enhance Competencies among Engineering Graduates
Authors
1 Department of CSE, Thiagarajar College of Engineering, Madurai, IN