BACKGROUND The purpose of this study is to compare air transportation of critically ill pediatric patients with a mixed air-ground transportation system by evaluating timeliness, safety, and cost. The setting was a tertiary care "hub" center with three outlying-referral "spoke" facilities. STUDY DESIGN Our study included 96 children transported between June and December 1997, with 45% constit...

Overhead hoist transportation systems (OHTS) have been the subject of worldwide research and development in recent years. The majority these are utilized semi-automated or fully automated factories. This article proposes a new solution for OTHS based on concept modulation mobile units that can move railway structure from one point to another. OHTS mentioned this is group shuttles operate indepe...

At the Institute of Air Transportation Systems of the German Aerospace Centre (DLR), methods for collaborative design are systematically developed and assessed. These collaborative design approaches are used to gain knowledge on the overall air transportation system. A collaborative working environment–the Integrated Design Laboratory (IDL) is established. It forms an experimental technical pla...

This paper attempts to solve a comprehensive design problem for a spare part logistic system. The design factors encompass logistic network design, part vendor selection, and transportation modes selection. Two approaches to solve the problem were proposed. In Approach 1, we simultaneously considered all the design factors and proposed two algorithms (SGA-1 and TGA-1). In Approach 2, the design...

An independent assessment of the Advanced Reusable Transportation System (ARTS) has been conducted. The ARTS concept is an all-rocket, fully reusable launch vehicle utilizing electromagnetic launch assist. ARTS is fitted with a dual-fuel main propulsion system utilizing flight proven Space Shuttle Main Engines and RD-180s. Nominally, the vehicle is intended to operate without a crew using auton...

the bus system in a high-speed public transportation systems are equipped with modern technology that due to accuracy, speed and flexibility have been considered as one of the improvement solutions in tehran's public transport system. in this article the performance of brt line three of tehran has been evaluated based on the established standard in 2013, developed by the institute for deve...

Creating cities that promote sustainable lifestyles is a complex and far reaching process. One of the most important components of sustainability on an urban scale is the need for an efficient public transportation system, which provides enough convenience that, combined with walking, can be more desirable for residents to use over driving a car. Vehicular traffic congestion is one of the great...