Knowledge Issues in Modeling
This paper aims at stressing the importance of the goal of modeling in identifying the underlying bodies of knowledge. It briefly describes the progression in complexity of modeling and...

A Speed Prediction Model for New Zealand Highways
This paper outlines a limiting speed model using probabilistic techniques to simulate the different types of vehicles and their performance along a two-lane rural highway. The road to...

Developments to the IRMA Model of AEC Projects
The rapidly advancing fields of information technologies (IT) for AEC and computer-integrated construction (CIC) rely on the ability to represent and exchange information about AEC projects...

Utilizing Mathcad for Hydraulic Design of Stormwater Pump Stations
This paper describes how the software Mathcad was used for hydraulic design of three pump stations (i.e. select pumps and size forcemains). The pump stations are part of a complete stormwater...

Demand/Supply Relationship in Transportation Network Design Problems: A Genetic Algorithm Approach
The cumulative genetic algorithm (CGA) has its significant advantages over the heuristic algorithms in dealing with transportation network design problems. Using CGA, the entire solution...

Conceptual Models of Product, Project and Document Data; Essential Ingredients of CIC
A number of current on-going national and international standardization efforts which develop standards for information structures in construction are reviewed in the paper. These concern...

DETMOD: A Desktop Estuarine Transport MODel
A microcomputer based numerical model designed to simulate the transport of substances within an estuary is presented. The Desktop Estuarine Transport MODel (DETMOD) features a Graphical...

A Simplified Method of Multistory-frame Analysis Including the P-Δ Effect
A simplified method of non-iterative analysis of rigid multistory-frames having vertical columns with different heights within the same story is developed by means of a modification to...

Practical Solution of the Flexibility to Stiffness Transformation Problem With a Mathematical Assistant for the Personal Computer
This paper will show how a relatively complicated structural mechanics problem can be solved easily with a symbolic manipulation program. Specifically, the authors will demonstrate how...

Finite Strain Consolidation for Vertical Drains
Consolidation equations for vertical prefabricated drains which consider finite vertical strain of the soil are derived. Estimated consolidation times are shorter when finite soil strain...

Reliability-Based Assessment of Corps Structures
Due to the limited amount of funding available for maintenance, rehabilitation, and replacement of aging Corps structures, the director of civil works, Headquarters, U.S. Army Corps of...

Uncertainty and Time Preference in Shore Protection
From a review of economic, psychologic, and geographic literature, three points of criticism of the economic model of choice are 1) when faced with losses, individuals tend not to be averse...

Subjective De-Biasing of Data Sets: A Bayesian Approach
In this paper, we examine the relevance of data sets (for instance, of past incidents) for risk management decisions when there are reasons to believe that all types of incidents have...

Developments in Risk Analysis Commercial Software
There has been a marked increase in the number and type of commercial software packages available to support risk and uncertainty analysis. Monte Carlo simulations, the first such tool,...

Federal Risk Management Policy: Where Is the Federal Government Heading? Where Are the Problems?
The paper summarizes the first session of the conference which discussed the present state and problems of federal risk management policy. Topics discussed include efficacy of models on...

Behavioral, Social, and Institutional Aspects of Risk Analysis
The paper summarizes the third session of the conference which discussed four items that become pitfalls for decision makers when neglected. These are parameter uncertainties as distinct...

Risk Management Strategies for Natural, Manmade, and Technological Hazards
The paper summarizes the fourth session of the conference which discussed risk assessment approaches in bio/chemical hazards; specific studies on people's behavior and views of natural...

Immobilization of Heavy Metals in Cementitious Matrix

Recovery of Chromium from Spent Plating Solutions by a Chromyl Chloride Process
A novel chromyl chloride process has been investigated for the recovery of hexavalent chromium from spent plating solutions. In this process chromium is converted to chromyl chloride by...

2D Finite Element Modelling of Flooding Due to River Bank Collapse
To compute the flood propagation over an initially dry area a new set of 2D equations has been recently proposed which accounts for the ground unevenness effects. The paper presents a...

 

 

 

 

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