Given a schedule of trains, the locomotive planning (or scheduling) problem (LPP) is to determine the minimum cost assignment of locomotive types to trains that satisfies a number of business and operational constraints. Once this is done, the railroad has to determine the sequence of trains to which each locomotive is assigned by unit number so that it can be fueled and serviced as necessary. ...

OBJECTIVE This study evaluated the prevalence of, and the risk factors for, obstructive sleep apnea syndrome (OSAS) among Brazilian railroad workers. METHODS Male railroad workers (745) from a railway company in Brazil were analyzed after responding to questionnaires about their demographics, sleep habits, excessive daytime sleepiness (Epworth), and the likelihood of having apnea (Berlin). We...

This paper aims to study the locomotive routing problem (LRP) which is one of the most important problems in railroad scheduling in view of involving expensive assets and high cost of operating locomotives. This problem is assigning a fleet of locomotives to a network of trains to provide sufficient power to pull them from their origins to destinations by satisfying a rich set of operational con...

Even though neither teachers nor learners are running for tacit knowledge, it is omnipresent even in engineering disciplines, such as electrical engineering and computer science. This paper is about a problembased learning environment, the model railroad project that is being developed at the University of Rostock. Two case studies, done in the Summer Term 2009, indicate that this problem-based...

Direct contact membrane distillation (DCMD) which emerges as an alternative separation technology can effectively perform a colloidal separation process under thermal driven force. DCMD is capable of extracting pure water from aqueous solutions containing non-volatile nanoparticles through the hydrophobic microporous membrane when a vapour pressure difference was established across the membrane...

Prashant Sharma*, V M S R Murthy** Avinash Paul***& Ajoy Kr Singh*** *3 year Student, Bachelor of Technology in Mining Engineering, Indian School of Mines, Dhanbad826 015, India Contact No. +918092633969, +918871601404; Email: [email protected] **Professor, Mining Engineering Department, Indian School of Mines, Dhanbad826 015, India ***Scientist, Central Institute of Mining and Fuel...

Devices for electric heating of railroad turnouts are elements the railway infrastructure protecting against blocking them by snow and ice in winter. They often operate based on principle resistance but other solutions also emerging. In this paper, one such new using phenomenon electromagnetic induction was presented tested under various conditions. comparison with traditional resistive heaters...