Mehmet Toycan

Development of handling money with no physical contact did not provide new opportunities only to clients, but to criminals as well. In fact, criminals are able to steal money with no physical contact and any tangible evidence remaining after their criminal transaction. In other words, they can conduct the robbery in their pijamas from their bed room. The purpose of this paper was to analyze and compare perceptions of Serbian and Croatian clients about IT security in online banking, to provide insight into similarities and differences of their view points and to create important set of information for all subjects active in banking industry. Results regarding both countries are collected and concluded after preparing survey based on six variables and specific questions assigned to each one of those variables. Survey was completed in both Serbia and Croatia at high response rates. Even 227 respondents replied from Serbia, while 203 respondents completed survey from Croatia. Results we...

The purpose of this paper is to examine clients‟ perceptions in Croatia towards information technology (IT) security of electronic banking (e-banking), to diagnose problems and try to give proper solutions. Methodology was survey based on six variables and specific questions assigned to each variable. Response rate was good and 203 respondents were surveyed. Findings indicated that Croatian e-banking users trust to banks when it comes to IT security of online banking. It is important to mention that clients perceive tangible features as important as they actually are. This proved that clients are aware of potential security threats, and even though they trust to bank, they are aware of their own responsibility when using e-banking services. Since there is gap in literature when it comes to research dealing with IT-security of electronic banking in Croatia, this article is both unique and good stimuli for new research in the future.

ABSTRACT This paper presents a converged fibre-to-the-home (FTTH) based access network architecture featuring wireless services. In order to fulfill the bandwidth demands from end users, a dynamic architecture is proposed with co-existence of LTE, WiMax and UWB technologies. Hybrid wavelength division multiplexing (WDM) and a time division multiplexing (TDM) based optical access network offer reconfigurable provision. This enhances the ability to allocate different wavelengths to different optical networking units (ONUs) on demand. In addition, two different channel routing modules (CRMs) are introduced in order to address the cost effectiveness and energy efficiency issues of the proposed network. Take-up rate adaptive-mode operation and traffic-adaptive power management are utilized to optimize the benefits of low investment cost with energy efficiency. Up to 26% power consumption reduction is achieved at the time of minimum traffic conditions while 10% consumption is achieved at the time of maximum traffic conditions. Besides, 23% energy saving can be achieved compared to conventional systems in fully operated stage.

ABSTRACT In this paper, we propose an optical access network architecture that integrates the wireless and wired services in a converged provision. Ultra wideband (UWB) technology offers new opportunities in communication area. Multi band orthogonal frequency division multiplexing (MB-OFDM) based UWB signal was modelled by using VPItransmissionMaker for downstream transmission by investigating the error vector magnitude (EVMs) values. UWB over single mode fibre (SMF) is first examined and maximum limit are achieved at 105km. For the second part of the analysis, 19km dispersion compensating fiber (DCF) is deployed in order to achieve long haul transmission distances. A distance of 225km was realized with -19.33 dB EVM results after dispersion compensation technique applied at 100km.

ABSTRACT We present a novel FTTH based access network architecture that integrates the wireless and wired services in a converged provision with dynamic bandwidth allocation. A wide range of interactive multimedia services are available to end-users by using latest-generation, OFDM based wireless technologies. Direct VCSEL modulation with 16QAM and 64QAM OFDM based WiMax signal (3.5 GHz) was modeled by using VPItransmissionMaker for upstream transmission by investigating the error vector magnitudes (EVMs). WiMax over standard single mode fibre (SSMF) is first examined and maximum limit stated in current standard of IEEE 802.16 WiMAX using 16QAM (EVM of -24.43 dB) and 64QAM (EVM of -30.4 dB) are achieved at 110km and 95 km respectively. For the second part of the analysis, dispersion compensating fiber (DCF) is deployed in order to achieve long haul transmission distances. A maximum achievable distance of 600km and 450km was realized with -27.6 dB EVM results after dispersion compensation technique applied to both 16QAM and 64QAM OFDM based WiMax respectively.

ABSTRACT We present an efficient scenario for deploying high-capacity optical access networks using Radio over Fibre technology. A wide range of interactive multimedia services are available to end-users by using latestgeneration, ultra wideband radio signalling methodology.

(1)Department of Computing and Electronic Systems, University of Essex, Wivenhoe Park, Colchester, UK, CO4 3SQ. e-mail: mpthak@essex.ac.uk (2) CIP Technologies, Adastral Park, Martlesham Heath, Ipswich, UK, IP5 7RE. e-mail: info@ciphotonics.com (3) ...

ABSTRACT In this paper, we propose a reconfigurable and converged optical access network architecture with dynamic bandwidth allocation. The network proposes the co-existence of long term evolution (LTE), wireless interoperability for microwave access (WiMax) and ultra-wide band (UWB) technologies. LTE is considered for next generation mobile telephony, WiMax is designed mainly for data transmission. In addition, UWB could be used for high definition (HD) audio and video communication applications. All technologies are generated by using VPI transmission Maker and simulated with 16 QAM modulation schemes. All the signals qualities are investigated with the error vector magnitudes (EVMs). LTE/WiMax/UWB over single mode fibre (SMF) is examined and maximum limit are achieved at 76km with an EVM of -18.2dB, 58km with an EVM of -25dB and 65km with an EVM of -19dB for LTE, WiMax and UWB respectively. It is also realized that the chromatic dispersion needs to be compensated for long transmission systems (above 100km).