In Digital Communication Systems, especially high-speed modems, it is desirable to increase the bit rate while maintaining the same bandwidth without seriously impairing transmission quality. Single-Carrier systems provide a decent bit rate, but Multi-Carrier systems give bit rates that are several orders higher. Asymmetric Digital Subscriber Line (ADSL) services and Orthogonal Frequency Divisi...

This study models innovation diffusion process with brand-level competition, focusing on the competition among ADSL service providers in Japan. For a particular brand (service provider), the diffusion process is assumed to be influenced by three forces: (1) the external influence through mass media, (2) the internal influence of the communication with the brand adopters, and (3) the influence d...

We study the pe r fo rmance of a mult ichannel modulation method f o r two contempla ted subsc r ibe r line d a t a services known a s asymmetr ic digital subsc r ibe r lines (ADSL) a n d very high-speed digital subsc r ibe r lines (VHDSL). I n the ADSL case, we find t h a t over all un loaded Nor th Amer ican subscr iber lines in o u r test se t , a n unidirect ional 1.536 M b / s d a t a r a ...

Making use of the Volterra approach, black box modeling is applied to a large scale analog circuitry for an ADSL (asymmetric digital subscriber line) central office application. Reducing the number of free parameters through special assumptions on the Volterra kernels, one ends up with the Hammerstein model. Taking the first few taps of the Volterra kernels and approximating the last taps throu...

Adenylosuccinate lyase deficiency (MIM 103050, ADSL) is a rare autosomal recessive disease causing severe mental retardation and/or autistic features. 2 Seizures are often observed (80%), varying in age of onset (from newborn to late childhood) and nature (tonic-clonic, “suppression burst” pattern, West syndrome, etc), and are very often resistant to all medication. Around 50% of the children s...

This article aims to study the incidence of extracurricular factors relating (a) personal work situation and place residence; (b) family finances; (c) access virtual environment on academic results university students during COVID-19 pandemic. Regression models were used determine impact different performance in a sample 138 Primary Education Teaching Degree at Spanish Public University. The sh...