نتایج جستجو برای: railroad blocking problem

تعداد نتایج: 930107  

Journal: :Social security bulletin 1983
B E Kritzer

consider an individual’s Railroad Retirement benefit, other than the tier I benefit, in dividing property in a divorce case. This would treat Railroad Retirement benefits like other pension benefits. The only benefits paid to divorced spouses under the Railroad Retirement system are tier I benefits. Tier I benefits would continue to be immune from garnishment, attachment, assignment, levy, or o...

Journal: :IBM Journal of Research and Development 2007
Balachandran Vaidyanathan Krishna C. Jha Ravindra K. Ahuja

We present our solution to the crew-scheduling problem for North American railroads. (Crew scheduling in North America is very different from scheduling in Europe, where it has been well studied.) The crew-scheduling problem is to assign operators to scheduled trains over a time horizon at minimal cost while honoring operational and contractual requirements. Currently, decisions related to crew...

2012
Anna Gorbenko

In this paper we describe an approach to solve the element duplication centre problem. Our approach is based on constructing logical models for considered problem.

2017
Mahmoud Reda Taha Timothy Jack Ross Timothy J. Ross Mahmoud R. Taha Jose Alberto Gómez

The railroad network carries 40 % of the freight in the US. Railroad bridges are the most critical part of the network and they need to be properly maintained for safety of operations. Railroad managers inspect the bridges to assess their structural condition. Railroad managers are interested in measuring displacements under train crossing events to prioritize their bridge management and safety...

2000

To determine the employment characteristics of workers covered jointly by old-age and survivors insurance and the railroad retirement program, a sample of the work histories from the Bureau of Old-Age and Survivors Insurance and the Railroad Retirement Board has been analyzed. In the analysis the hypothesis has been developed that, as time progresses, virtually all railroad workers will at some...

2004
William A. Clarke Peter D. Loeb

This paper addresses the determinants of three types of railroad related fatalities: trespasser fatalities, those at grade crossings, and those involving passengers and employees. Of particular interest are the effects of railroad deregulation (the Staggers Act) on railroad related fatalities. Models are developed using specification error analysis and seemingly unrelated regression. Deregulati...

Journal: :Work 2012
Robert O Andres Chip Wade

This is a review of walking tasks in the railroad environment, and the injuries that result from slips, trips, falls, or other acute or even non-traumatic exposures. The lack of federal regulations for railroad walkways has led several states to develop and enforce their own regulations. Support from the research literature for such regulations has come from biomechanical studies of the effects...

1995
Carlos Puchol

We present a solution to the Generalized Railroad Crossing benchmark problem based on the ESTEREL programming language. The solution is shown to satisfy the formal statements of the properties that the system requirements specify by using a verification method for safety properties of ESTEREL programs recently developed. The solution and verification presented have been developed within the syn...

2013
John Howard Brown J. H. Brown

The emergence of railroads presented a problem for the developing economic profession. Railroads, by their very nature, often had a localized monopoly. The check that competition was expected to impose on firm behavior was singularly lacking. At the same time, railroads in the United States were national in scope and thus affected interstate commerce. The Interstate Commerce Act and the Commiss...

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