Railway transport in Qatar

Solving Public Railway Transport Networks with SAT

SAT solvers have been already successfully applied in several industrial fields, which are not directly related to propositional logic. In this work, the periodic event scheduling problem (PESP) will be presented and, furthermore, the order encoding from a PESP instance to a SAT instance. The NP-complete PESP is particularly important in several traffic scenarios with periodic properties. Most ...

Classifying Railway Passenger Stations for Use Transport Planning – Application to Bulgarian Railway Network

A methodology for the classification of railway passenger stations was developed in this study. Four groups of factors are defined to study the characteristics of the station: potential of the town, importance of the town, infrastructural factors, and characteristics of passengers. In the research we investigated 18 factors and studied 98 passenger stations of railway network in Bulgaria. The m...

Hepatocellular carcinoma in qatar.

OBJECTIVE The main aim of this study was to report and discuss epidemiological, etiological, type of treatment and data on survival of the patients with each mode of treatment using available data for patients with hepatocellular carcinoma (HCC) who have been diagnosed at Hamad Medical Corporation during the period March 2004-December 2010 inclusive. MATERIALS AND METHODS Retrospective analys...

Dementia in Qatar.

OBJECTIVE Dementia is a major public health problem among the elderly in developed countries and a growing problem in the underdeveloped countries. There are no published data on dementia in any of the Arabic countries. The aim of this study was to determine the different sub-types of dementia among Qataris. METHODS A retrospective and prospective ongoing hospital-based study in which all med...

[Environment-induced human damages caused by railway transport].