ISCC

Active Queue Management (AQM) policies are mechanisms for congestion avoidance, which pro-actively drop packets in order to provide an early congestion notification to the sources. Random Early Detection (RED), the defacto standard and its different flavors have been proposed as simple solutions to the AQM problem. However, these approaches require manual tuning and fail to accurately capture variations in the

Abstract — Most Unix systems provide a set of system calls that allow applications to interact with the network directly. These primitives are useful for example in packet capture applications, which need to grab the data flowing through the network without any further ...

In order to support mobile users, the basic Internet protocols have been extended with protocols (eg, Mobile IPv6) for intercepting and forwarding packets to a mobile and possibly roaming node. Seamless roaming requires that users and applications do not experience loss of connectivity or any noticeable interruption in traffic. This is not only important for highly delay-sensitive traffic, but also for TCP-based traffic, as its performance is highly sensitive to packet loss and reordering. It is therefore imperative that handovers ...

Air pollution levels remain high in Poland, whereas in other European countries they decrease. There are different reasons for that. Oil and gas industry, fossil fuel production and consumption are some of them.
The state attempts to reduce the air pollution or alleviate its consequences. It creates, therefore, policies directed at reducing the levels of air pollution on the one hand and creating incentives to use renewable resources on the other. As a result, producing and burning fossils becomes more expensive, whereas sustainable energy projects become more interesting for consumers and investors, thus losing the stigma of ESG investment projects. What are the mechanics of making renewable energy projects plausible in European states? How is the air pollution caused by the fuel industry seen by public economics? What strategies does the state apply in order to implement environmentally friendly fuel policies? In this essay we are going to address the questions in light of the relation between diesel fuel trading and measures aimed against pollution on the example of Poland. We shall discuss the economic costs of air pollution and analyse the effects of the government’s policies aimed at promoting biofuels. In this essay, we reference to different kinds of sources to illustrate our points. Scientific articles on public economics, game theory and environmental economics tackling the issues of air pollution as well as pamphlets about the tragedy of the commons provide the theoretical basis for the paper. We also appeal to EU and national decrees and laws in order to illustrate how public policies are applied. Statistical sources include digital databases of the IAE, BP etc.

File type identification and file type clustering may be difficult tasks that have an increasingly importance in the field of computer and network security. Classical methods of file type detection including considering file extensions and magic bytes can be easily spoofed. Content-based file type detection is a newer way that is taken into account recently. In this paper, a new content-based method for the purpose of file type detection and file type clustering is proposed that is based on the PCA and neural networks. The proposed ...

Abstract The mobile IPv6 handover process consists of three major stages: movement detection, duplicate address detection and binding signaling. Most of the research efforts for optimizing the handover process focuses on minimizing the delays caused by the first two stages. The delay introduced by binding signaling is largely ignored since the correspondent node is assumed to be stationary. However, this delay can be significant when two communicating nodes are both mobile and may roam across different networks ...

A common way to protect objects in distributed systems is to issue authorization certificates to users, which they present to gain access. In some situations a way is needed to revoke existing certificates. Current methods, such as having a master revocation list, ...

... Andrea Detti, Giuseppe Bianchi, Claudio Pisa, Francesco Saverio Proto, Pierpaolo Loreti University of Rome Tor Vergata {andrea.detti, claudio.pisa}@uniroma2.it ... More specifically, H.264 SVC introduces three enhancement di-mensions: video frame size, video frame ...

... This is called a Gray Hole. ... The implementation is such to provide support to the dynamism of the Trust Management System. ... It is again important to remember at this point, that at a particular time we are simulating a single attack; however, we do not change our DTMS system as ...

The mobile Internet is enabling a broad range of new applications that dynamically obtain information that is relevant to their current location. This type of application would greatly benefit from generic mechanisms for supporting the association between network resources and physical space, but existing systems are typically based on vertical approaches valid only for narrow application scenarios. This paper argues that a comprehensive solution to this issue should address the important challenges of heterogeneity and openness, and proposes an approach based on the concept of location-based service, i.e. a service whose usage is associated with physical space, as a generic abstraction to support the development of location-dependent systems. The paper describes a model for associating location scopes with services, an architecture to support the discovery of location-based services on the Internet, and a prototype infrastructure in which several services and applications have been...

Abstract Deployment and configuration of grid computing applications are exhaustive and error-prone tasks, and represent a weak link of the lifecycle of grid applications. To address the problem, this paper proposes AGRADC, an architecture to instantiate grid applications on demand, which incorporates features from the autonomic computing paradigm. This architecture improves the grid application development process, providing tools to define a deployment flow, configuration parameters, and actions to be executed when adverse ...