Learn More
This paper considers providing two types of QoS guarantees, proportional delay differentiation (PDD) and absolute delay guarantee (ADG), in the database connection pool (DBCP) for Web application servers using the classical feedback control theory. PDD aims to maintain the average queuing delay ratio between different classes of requests according to(More)
Most of flooding algorithm of recent Ad Hoc multicast routing protocols are suitable under specific networks conditions. If the condition changes like increasing the number of multicast source nodes and networks nodes or having higher node speed and more traffic loads, they will not work well. To provide multicast routing support for a wide range of(More)
Focusing on dropping packets attacks in sensor networks, we propose a model of dropping packets attack-resistance as a repeated game based on such an assumption that sensor nodes are rational. The model prevents malicious nodes from attacking by establishing punishment mechanism, and impels sensor networks to reach a collaborative Nash equilibrium.(More)
Cryptographic function implementations are known to leak information about private keys through timing information. By using statistical analysis of the variations in runtime required to encrypt different messages, an attacker can relatively easily determine the key with high probability. There are many mitigation techniques to combat these side channels;(More)
High-assurance systems found in safety-critical infrastructures are facing steadily increasing cyber threats. These critical systems require rigorous guarantees in information flow security to prevent confidential information from leaking to an unclassified domain and the root of trust from being violated by an untrusted party. To enforce bit-tight(More)
Incremental learning algorithms of the Gaussian Mixture Model can find applications in various scenarios. This paper proposes a CUDA-based method to accelerate incremental learning of GMM. Different from existing methods towards GMM on GPU, our method aims to hide data transfer latency instead of accelerating the algorithm itself. Due to the inherent(More)
We propose and implement a load balancing Web cluster architecture supported differentiated service. By adjusting the resource quotas assigned to different classes in back-ends and with Maximum Idle First load balancing strategy, the Web cluster system achieves Proportional Delay Differentiation Service and an efficient and fair resource allocation among(More)
Many kinds of huge amount of tweets about real-world events are generated everyday in Twitter. However, the disorganization messages required to be classified by topics and events are one of challenges to get knowledge effectively. To solve the problem, we propose a novel method that combines the cluster algorithm with label propagation algorithm to detect(More)
As an important differentiated service model, proportional delay differentiation (PDD) aims to maintain the queuing delay ratio between different classes of requests or packets according to pre-specified parameters. This paper considers providing PDD service in web application servers through feedback control-based database connection management. To achieve(More)