DMT modulation has become a standard communications method for DSL and indoor LAN technology. By utilising the FFT it is able to overcome the problems associated with transmission over a nonflat communications channel. In DSL and indoor LAN technologies, the dominant source of performance impairment is crosstalk. Results are presented here in the context of DMT on an economical cabling scheme w...

Unlike old-fashioned aircrafts that almost did not have avionics systems, up to date aircrafts have numerous avionics systems. Nearly all new aircrafts have devices for navigation, automatic flight control, collision avoidance systems, flight data recorder, weather radar system in addition to communication and monitoring systems. All of these devices employ embedded computer systems with growin...

To provide keyword-based access to a large text file it is usually necessary to invert the file and create an inverted index that storeso for each word in the file, the paragraph or sentence numbers in which that word occurs. Inverting alarge file using traditional techniques may take as much temporary disk space as is occupied by the file itself, and consume a great deal of cpu time. Here we d...

for comments. The findings, intepretations, and conclusions expressed in this paper are entirely those of the author(s) and not necessarily represent the views of the World Bank, its Executive Directors, or the countries they represent.Working papers describe research in progress by the author(s) and are published to elicit comments and to further debate Summary Although much interesting work h...

In the past decade, the wireless industry has undergone a metamorphosis. This industry has turned from a predominantly military driven market to a cost conscious, consumer driven commercial market. At the same time, the wireless applications are moving up in the frequency spectrum. A typical example would be the PCS system. The PCS systems are currently designed for 1.9 GHz spectrum, but the ne...

Our work is in machine learning, a subfield of artificial intelligence. We describe a variant of the ID3 algorithm [5] which is attuned to the situation that every feature’s value-set is linearly ordered and finite. We then seek economical training sets, that is, ones which are small in size but result in learned decision trees of high accuracy. Our search focuses on geometric properties of the...

Intrusion Detection Systems (IDS) are very important to protect important services against malicious actions. Detailed knowledge of information processing and protocols are necessary to protect the services and systems sufficient against attacks. IDS are currently independent and coexisting solutions. Each single IDS requires its individual administration access, administration handling and man...

A mobile intensive care unit is an important extension of a regional intensive treatment service. The treatment and monitoring of critically ill patients can be maintained during transfer for specialist investigation or treatment. Such units can be brought into service with low construction and running costs.

In this paper we discuss the bounds of and relations among various kinds of intersection numbers of graphs. Especially, we address extremal graphs with respect to the established bounds. The uniqueness of the minimum-size intersection representations for some graphs is also studied. In the course of this work, we introduce a superclass of chordal graphs, defined in terms of a generalization of ...