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Articles 1 - 5 of 5

Full-Text Articles in Operations Research, Systems Engineering and Industrial Engineering

Erfahrungen Mit Busspuren In Usa, Vukan R. Vuchic Nov 1994

Erfahrungen Mit Busspuren In Usa, Vukan R. Vuchic

Departmental Papers (ESE)

No abstract provided.


Short-Term Improvements For Septa's Regional Rail System, Vukan R. Vuchic, Shinya Kikuchi, Eric C. Bruun, Partha Chakroborty, Yong Shin Eun, Janaki Parameswaran, Nikola Krstanoski, Natasa Vukadinovic Aug 1994

Short-Term Improvements For Septa's Regional Rail System, Vukan R. Vuchic, Shinya Kikuchi, Eric C. Bruun, Partha Chakroborty, Yong Shin Eun, Janaki Parameswaran, Nikola Krstanoski, Natasa Vukadinovic

Departmental Papers (ESE)

SEPTA has made significant improvements on its Regional Rail System since its takeover from Conrail some 10 years ago. This system now offers highly reliable service; stations are clean, many have obtained improved platforms, signs and other equipment; Trailpasses are used extensively. Yet, the ridership is low relative to the excellent coverage the network provides, and it has had a predominantly declining trend. Moreover, financial results are unsatisfactory: the Regional Rail Division's operating ratio is considerably lower than the other SEPTA divisions' ratios. There is a serious danger that the system will continue along a "spiral" of increasing fares ...


The Bus Transit System: Its Underutilized Potential, Vukan R. Vuchic, Eric Christian Bruun, Nikola B Krstanoski, Yong Eun Shin, Shinya Kikuchi, Partha Chakroborty, Vijay Perincherry May 1994

The Bus Transit System: Its Underutilized Potential, Vukan R. Vuchic, Eric Christian Bruun, Nikola B Krstanoski, Yong Eun Shin, Shinya Kikuchi, Partha Chakroborty, Vijay Perincherry

Departmental Papers (ESE)

The bus system represents the most widely used transit mode. Upgraded bus services, primarily those which have partially or fully separated rights-of-way, represent a very cost effective method to improve the balance between automobile and transit. Many measures for improving bus services were introduced since 1970. However, many of these improvements were not maintained: buses were gradually returned to operations in mixed traffic. The report examines the quality of bus services in various cities in North America and worldwide and analyzes the reasons for the phenomenon of “backsliding” or disappearance of bus transit priority measures.


Planning And Control Of Robotic Juggling And Catching Tasks, M. Buehler, Daniel E. Koditschek, P. J. Kindlmann Apr 1994

Planning And Control Of Robotic Juggling And Catching Tasks, M. Buehler, Daniel E. Koditschek, P. J. Kindlmann

Departmental Papers (ESE)

A new class of control algorithms—the “mirror algorithms”— gives rise to experimentally observed juggling and catching behavior in a planar robotic mechanism. The simplest of these algorithms (on which all the others are founded) is provably correct with respect to a simplified model of the robot and its environment. This article briefly reviews the physical setup and underlying mathematical theory. It discusses two significant extensions of the fundamental algorithm to juggling two objects and catching. We provide data from successful empirical verifi cations of these control strategies and briefly speculate on the larger implications for the field of robotics ...


Urban Transportation - A Special Challenge For Civil Engineers, Vukan R. Vuchic Jan 1994

Urban Transportation - A Special Challenge For Civil Engineers, Vukan R. Vuchic

Departmental Papers (ESE)

Transportation has historically had a major influence on cities - their locations, growth and form. Civil engineers were the leading public servants in construction of railway and transit systems. With diversification of transportation and, particularly, growth of highways, the solutions to urban transportation have become extremely complex. Instead of only building new facilities, it is now necessary to coordinate different modes.

Planning of transportation is defined at four levels: individual facilities, single mode networks, intermodal systems and city-transportation relationships. It is shown that the latter two levels have not been adequately performed. Coordination of systems must be given greater attention. A ...