Julio C. Martínez

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This paper examines the characteristics of discrete-event simulation systems in terms of their application breadth (general or special purpose), modeling paradigm (process interaction vs. activity scanning), and flexibility (programmable or not). Several construction simulation systems are examined with primary emphasis on CYCLONE and STROBOSCOPE as(More)
EZStrobe is a very simple but powerful general-purpose simulation system designed for modeling construction operations, but domain independent and thus useful for modeling a wide variety of systems in any discipline. EZStrobe is based on Activity Cycle Diagrams and employs the Three-Phase Activity Scanning paradigm. It is therefore naturally adept for(More)
Earthwork projects are performed in an environment fraught with uncertainty and using expensive machines that interact in complex ways. While the planning of these projects can be improved significantly using discrete-event simulation, most projects are still planned using traditional tools. Recent advances in general-purpose simulation tools for(More)
Stroboscope is a programming language designed for the simulation of processes common to construction engineering. These processes are very complex and involve many different types of resources. As a result, Stroboscope is also an efficient and effective general purpose simulation system. This paper presents an overview of Stroboscope and illustrates how it(More)
One of the primary impediments in the use of discrete-event simulation to design construction operations is that decision-makers often do not have the means, the knowledge, and/or the time to check the veracity and the validity of simulation models and thus have little confidence in the results. Visualizing simulated operations in 3D can be of substantial(More)
Field construction can be planned, monitored, and controlled at two distinct levels: 1) the activity or schedule level; and 2) the operation or process level. Graphical 3D visualization can serve as an effective communication method at both levels. Several research efforts in visualizing construction are rooted in scheduling. They typically involve linking(More)
PURPOSE Evaluate short results after fundoplication procedure, concerning the division of short gastric vessels. METHODS A prospective randomization of 90 patients with indication for hiatoplasty and total fundoplication with fundus mobilization was performed. They were divided into two groups: no SGV division (group A, n= 46) and with SGV division (Group(More)
Significant advances have been made in the field of construction process modeling. However, no convenient graphical support tools exist that can depict the modeled operations in 3D. This results in the "black box" effect being experienced by many simulation output analysts who have reservations about the credibility of the analysis based solely on the text(More)