A case-control study of lung cancer mortality in U.S. railroad workers in jobs with and without diesel exhaust exposure is reanalyzed using a new threshold regression methodology. The study included 1256 workers who died of lung cancer and 2385 controls who died primarily of circulatory system diseases. Diesel exhaust exposure was assessed using railroad job history from the US Railroad Retirem...

the performance of many traffic control strategies depends on how much the traffic flow models are accurately calibrated. one of the most applicable traffic flow model in traffic control and management is lwr or metanet model. practically, key parameters in lwr model, including free flow speed and critical density, are parameterized using flow and speed measurements gathered by inductive loop d...

Abstract In this paper, we examine multiple segments, conventionally analyzed from the perspective of business diversification, perspectives in a multifaceted market. Specifically, based on segmental financial data, conduct an empirical analysis whether increased sales transportation increase profit margin real estate railroad company. The results show that there are two types sidedness among m...

The Brazilian freights railroad transportation, in the last five years, is achieving a significant growth. Currently, the railroad transport operators use performance evaluation measures, related to financial and operational aspects, being that in some cases, there isn’t a relation of cause and effect between them. According to the Brazilian research, 85% of the railroad transport companies use...