Adenylosuccinase (ADSL) deficiency is an autosomal recessive disorder affecting mainly the nervous system. The disease causes psychomotor retardation, frequently with autistic features and epilepsy. ADSL deficiency may be diagnosed by detection of two abnormal metabolites in body fluids--succinyladenosine (S-Ado) and succinylaminoimidazole carboxamide riboside (SAICAr). It is assumed that the f...

The practical implementation of communication over power lines (PLC) using an Asymmetric Digital Subscriber Line (ADSL) front-end is discussed. Both PLC and ADSL modems are based on the same principle of using their respective transmission medium in a frequency range they were never originally designed for. One property both technologies share is the large power that is required when transmitti...

In this paper we tackle the problem of video transmission over ADSL channel. Due to the delay constraint of the transmission, the Shannon’s theorem is not strictly applicable and it seems challenging to evaluate which is the contribution of joint source/channel coding. The ADSL system is standardized to work at a Bit Error Rate (BER) of 10. In this work we relax this constraint in order to unde...

In this paper, we report an issue first observed when using block-floating-point calculations in a time equalizer of an ADSL modem. We believe this important phenomenon have been out of the sight of researchers till now; and show that neglecting this issue may increase the round-off error significantly and reduce the SNR of a system. The simulation results suggest that ignoring this issue may i...

This paper deals with feedback transmission in IPTV (Internet Protocol Television). It describes all important units, methods and processes used in IPTV technology. First, it describes IPTV in general and focuses on the specific terms of use. The first section also contains basic information about classical TV transmission, discusses differences of IPTV technology and shows the advantages and d...

This paper examines the performance of bundled ADSL systems and proposes an extension to their bit-loading mechanism that results to fair allocation of the available bandwidth. The “ratemaximization” bit-loading method provides less average data rate compared to the optimum “target-rate” strategy, which depends on the number of active lines in the system and the length of the DSL loop. Under a ...

Some recent large scale studies on residential networks (ADSL and FTTH) have provided important insights concerning the set of applications used in such networks. For instance, it is now apparent that Web based traffic is dominating again at the expense of P2P traffic in lots of countries due to the surge of HTTP streaming and possibly social networks. In this paper we confront the analysis of ...

Currently there appears to be a lack of research in the area of developing tools, testing methodologies, and creating standards for ADSL router forensics. The paper examines a wide range of literature and introduces the concept of ADSL router forensics as a new and potential field of research for digital forensics investigators. It begins by examining why there is a need for router forensics by...