in this study two indices of tempo and quantum of fertility for the city of tehran are calculated. the tables are based on data which have been collected in a survey in 1986. the sampling was administrated at two stages. at the beginning 158 geographical points were considered (the number of first birth order during 24 hours in tehran), then on the first stage 17 random geographical points were...

The berth allocation problem (BAP), which de nes a processing interval and a berth at the quay wall for each ship to be (un-)loaded, is an essential decision problem for e ciently operating a container port. In this paper we integrate mobile quay walls into the BAP. Mobile quay walls are huge propelled oating platforms, which encase ships moored at the immobile quay and provide additional quay ...

It is proposed to evaluate various options for the mooring of a vessel at berth cargo terminal by integer time intervals, which, when using Erlang's formulas, generalized case Markov process, can be used solve problems planning loading and unloading operations on company's ships, should presented in form vector, size which determined number possible states "ship – berth" system.
 A method ...

The operations and decision making at a container terminal have been simulated. A Berth Allocation Management System – (BAMS) has been built which consists of two parts: a container terminal simulator modelling the operations and a management simulator modelling the various actors involved in the allocation of container ships to berths. Together these two parts generate berth schedules for arri...

Berth scheduling can be described as the resource allocation problem of berth space to vessels in a container terminal. When defining the allocation of berths to vessels container terminal operators set several objectives which ideally need to be optimized simultaneously. These multiple objectives are often non-commensurable and gaining an improvement on one objective often causes degrading per...

The berth scheduling problem deals with the assignment of vessels to berth space in a container terminal. Defining berth schedules in container terminal operations translates in meeting different objectives that are often noncommensurable and gaining an improvement on one objective often causes degrading performance on the others. In this paper the discrete space and dynamic arrival berth sched...

This paper addresses the berth allocation problem in a multi-user container terminal. There are two typical schemes for berth allocation: one in discrete locations and the other in continuous locations. The former has the advantage of easiness in scheduling but it has a weakness in that terminal usage is not fully efficient. The latter exhibits the complete opposite characteristics. In previous...

INTRODUCTION Injuries and fatalities due to large truck and other vehicle crashes have decreased over the last decade, but motor vehicle injuries remain a leading cause of death for both the working and general populations. The present study was undertaken to determine semi truck driver and sleeper berth passenger injury risk in a moving semi truck collision using a matched-pair cohort study. ...

Ports are one of transportation’s logistic components crucial to supporting international trade and economic growth. Increasing at an average annual rate of 16%, the Port of Savannah has been America’s fastest-growing port since 2001. Because of this rapid growth, there is a need to develop a cost-effective means to explore and evaluate new productivity improvement alternatives (e.g. a facility...

Berth ~hed.ulin9 is a critical functi?" at marine container terminals and determining the best berth schedule depends on several factors including the type and function of the port, size of the port, location, nearby competition, and type of contractual ~greement between the terminal and the carriers. In this paper we formulate the berth scheduling problem as a bi-objective mixed· Integer probl...