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Mahalakshmi, G.
- Can Hydrocarbons in Coastal Sediments be Related to Terrestrial Flux? A Case Study of Godavari River Discharge (Bay of Bengal)
Abstract Views :267 |
PDF Views:95
Authors
Rayaprolu Kiran
1,
V. V. J. Gopala Krishna
1,
B. G. Naik
1,
G. Mahalakshmi
2,
R. Rengarajan
3,
Aninda Mazumdar
2,
Nittala S. Sarma
1
Affiliations
1 Marine Chemistry Laboratory, Andhra University, Visakhapatnam 530 003, IN
2 National Institute of Oceanography, Dona Paula, Goa 403 004, IN
3 Physical Research Laboratory, Navrangpura, Ahmedabad 380 009, IN
1 Marine Chemistry Laboratory, Andhra University, Visakhapatnam 530 003, IN
2 National Institute of Oceanography, Dona Paula, Goa 403 004, IN
3 Physical Research Laboratory, Navrangpura, Ahmedabad 380 009, IN
Source
Current Science, Vol 108, No 1 (2015), Pagination: 96-100Abstract
A sediment core aged ~250 years and deposition rate of ~2.4 mm yr-1 raised from the coastal region receiving inputs from the Godavari river was examined for n-alkanes. The carbon preference index (CPI) of shortchain hydrocarbons (SHC) indicated intense bacterial activity. The long-chain hydrocarbons (LHC) were major and their CPI (CPILHC) indicated that the terrestrial source was more dominant compared to the in situ input. CPILHC is significantly linearly correlated and appears to be a proxy for the historical discharge of the river.Keywords
Carbon Preference Index, Coastal Sediments, Hydrocarbons, Terrestrial Flux.- A Unified Approach for Detection and Prevention of DDOS Attacks Using Enhanced Support Vector Machines and Filtering Mechanisms
Abstract Views :218 |
PDF Views:0
Authors
T. Subbulakshmi
1,
P. Parameswaran
2,
C. Parthiban
2,
M. Mariselvi
3,
J. Adlene Anusha
3,
G. Mahalakshmi
3
Affiliations
1 Department of Information Technology, Sethu Institute of Technology, IN
2 Tata Consultancy Services, IN
3 Department of Computer Science and Engineering, Thiagarajar College of Engineering, IN
1 Department of Information Technology, Sethu Institute of Technology, IN
2 Tata Consultancy Services, IN
3 Department of Computer Science and Engineering, Thiagarajar College of Engineering, IN
Source
ICTACT Journal on Communication Technology, Vol 4, No 2 (2013), Pagination: 737-743Abstract
Distributed Denial of Service (DDoS) attacks were considered to be a tremendous threat to the current information security infrastructure. During DDoS attack, multiple malicious hosts that are recruited by the attackers launch a coordinated attack against one host or a network victim, which cause denial of service to legitimate users. The existing techniques suffer from more number of false alarms and more human intervention for attack detection. The objective of this paper is to monitor the network online which automatically initiates detection mechanism if there is any suspicious activity and also defense the hosts from being arrived at the network. Both spoofed and non spoofed IP's are detected in this approach. Non spoofed IP's are detected using Enhanced Support Vector Machines (ESVM) and spoofed IP's are detected using Hop Count Filtering (HCF) mechanism. The detected IP's are maintained separately to initiate the defense process. The attack strength is calculated using Lanchester Law which initiates the defense mechanism. Based on the calculated attack strength any of the defense schemes such as Rate based limiting or History based IP filtering is automatically initiated to drop the packets from the suspected IP. The integrated online monitoring approach for detection and defense of DDoS attacks is deployed in an experimental testbed. The online approach is found to be obvious in the field of integrated DDoS detection and defense.Keywords
DDoS Attacks, Lanchester Linear Law, Enhanced Support Vector Machines, Rate Based Limiting, History Based IP Filtering.- Towards Smarter Metropolitan Urgent Situation Response
Abstract Views :96 |
PDF Views:0
Authors
Affiliations
1 Veltech Multitech Dr. RR Dr. SR Engineering College, IN
1 Veltech Multitech Dr. RR Dr. SR Engineering College, IN