Alex Talevski

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Voice over internet protocol (VoIP) is a way to carry out a telephone conversation over a data network. VoIP products promise converged telecommunications and data services that are cheaper, more versatile and provide good voice quality as compared to traditional offerings. Although VoIP is widely used, VoIP on mobile devices is still in its infancy.(More)
The most widely recognized form of spam is e-mail spam, however the term “spam” is used to describe similar abuses in other media and mediums. Spam 2.0 (or Web 2.0 Spam) is refereed to as spam content that is hosted on online Web 2.0 applications. In this paper: we provide a definition of Spam 2.0, identify and explain different entities(More)
In the last few years the web has evolved from just being a source of information to a platform for business applications. In parallel to this, wireless sensor network technologies have evolved to a stage where they are capable of connecting to the web. This amalgamation of technologies referred to as “Web of Things”, has created new opportunities for(More)
Internet bots have been widely used for various beneficial and malicious activities on the web. In this paper we provide new insights into a new kind of bot termed as web spambot which is primarily used for spreading spam content on the web. To gain insights into web spambots, we developed a tool (HoneySpam 2.0) to track their behaviour. This paper presents(More)
The paper provides a study on the use of Wireless Sensor Networks (WSNs) in refineries, petrochemicals, underwater development facilities, and oil and gas platforms. The work focuses on networks that monitor the production process, to either prevent or detect health and safety issues or to enhance production. WSN applications offer great opportunities for(More)
This paper presents a comparison of the current Wireless Sensor Network (WSN) standards that are available for industrial applications. Zigbee, WirelessHART and the recently released ISA.100 are carefully considered. The comparison outlines how WirelessHART and ISA.100 address some of the ZigBee weaknesses in the oil and gas domain.
The very recent development of Cyber-Physical Systems (CPS) provides a smart infrastructure for connecting abstract computational artifacts with the physical world. As new CPS applications start to interact with the physical world using sensors and actuators, there is a great need for ensuring that the actions initiated by the CPS is timely. This will(More)
The rapid growth of computing, the Internet and telecommunications systems have resulted in a broad range of ways to communicate and access information. voice over Internet protocol (VoIP) is a computer telephony integration (CTI) solution that transports voice traffic over a data network as an alternative to the plain old telephone service (POTS). VoIP(More)
The monitoring of oil and gas plants using sensors allows for greater insight into safety and operational performance. However, as a result of strict installation regulations of powered sensors near oil and gas fittings, the introduction of new wired sensors to optimize end-of-lifecycle plants has been expensive, complex and time consuming. Recent advances(More)
Modern multimedia communication tools must have high security, high availability and high quality of service (QoS). Any security implementation will directly impact on QoS. This paper will investigate how end-to-end security impacts on QoS in Voice over Internet Protocol (VoIP). The QoS is measured in terms of lost packet ratio, latency and jitter using(More)