Browsing Scholarly Works, Grado Department of Industrial and Systems Engineering by Issue Date
Now showing items 1-20 of 96
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Determination Of Unit Costs For Library Services
(ACRL Publications, 1979-05-01)As with other public service activities, inflationary trends and public opinion provide a clear mandate for attempts to control the increasing costs of providing library services. Cost control necessarily requires knowledge ... -
The effect of burst duration, interstimulus onset interval, and loudspeaker arrangement on auditory apparent motion in the free field
(Acoustical Society of America, 1994-12-01)The illusion of auditory apparent motion (AAM) was examined in order to determine the burst durations and interstimulus onset intervals (ISOIs) at which AAM is heard when spatial information regarding source location was ... -
Intractability results in discrete-event simulation
(EDP SCIENCES, 1995)Simulation is often viewed as a modeling methodology of last resort. This is due to the lack of automated algorithms and procedures that exist to aid in the construction and analysis of simulation models. Jacobson and ... -
Development of a new standard laboratory protocol for estimating the field attenuation of hearing protection devices. I. Research of Working Group 11, Accredited Standards Committee S12, noise
(Acoustical Society of America, 1996-03-01)This paper describes research conducted by Working Group 11 of Accredited Standards Committee S12, Noise, to develop procedures to estimate the field performance of hearing protection devices (HPDs). Current standardized ... -
Development of a new standard laboratory protocol for estimating the field attenuation of hearing protection devices. Part III. the validity of using subject-fit data
(Acoustical Society of America, 1998-02-01)The mandate of ASA Working Group S12/WG11 has been to develop "laboratory and/or field procedure(s) that yield useful estimates of field performance" of hearing protection devices (HPDs). A real-ear attenuation at threshold ... -
Information theory and the finite-time behavior of the simulated annealing algorithm: Experimental results
(INFORMS, 1999)This article presents an empirical approach that demonstrates a theoretical connection between (information theoretic) entropy measures and the finite-time performance of the simulated annealing algorithm. The methodology ... -
Effects of stereopsis and head tracking on performance using desktop virtual environment displays
(MIT Press, 1999-04-01)This study investigated performance in a desktop virtual environment as a function of stereopsis and head tracking. Ten subjects traced a computer-generated wire using a virtual stylus that was slaved to the position of a ... -
A conceptual model of the sense of presence in virtual environments
(MIT Press, 1999-04-01)This paper proposes a model of interaction in virtual environments which we term the immersion, presence, performance (IPP) model. This model is based on previous models of immersion and presence proposed by Barfield and ... -
Collaborative task performance for learning using a virtual environment
(MIT Press, 1999-08-01)This paper describes a study on the sense of presence and task performance in a virtual environment as affected by copresence (one subject working alone versus two subjects working as partners), level of control (control ... -
Enhanced model representations for an intra-ring synchronous optical network design problem allowing demand splitting
(INFORMS, 2000)In this paper, we consider a network design problem arising in the context of deploying synchronous optical networks (SONET) using a unidirectional path switched ring architecture, a standard of transmission using optical ... -
Applying variance reduction ideas in queuing simulations
(Cambridge University Press, 2001)Variance reduction techniques are often underused in simulation studies. In this article, we indicate how certain ones can be efficiently employed when analyzing queuing models. The first technique considered is that of ... -
The Ph-t/Ph-t/infinity (k) 100 (K) queueing system: Part II - the multiclass network
(INFORMS, 2004)We demonstrate a numerically exact method for evaluating the time-dependent mean, variance, and higher-order moments of the number of entities in the multiclass [Ph-t/Ph-t/infinity](K) queueing network system, as well as ... -
The Ph-t/Ph-t/infinity queueing system: Part I - the single node
(INFORMS, 2004)We develop a numerically exact method for evaluating the time-dependent mean, variance, and higher-order moments of the number of entities in a Ph-t/Ph-t/infinity queueing system. We also develop a numerically exact method ... -
Enhancing Lagrangian dual optimization for linear programs by obviating nondifferentiability
(INFORMS, 2007)We consider non differentiable optimization problems that arise when solving Lagrangian duals of large-scale linear programs. Different from traditional subgradient-based approaches, we design two new methods that attempt ... -
Solutions and optimality criteria to box constrained nonconvex minimization problems
(American Institute of Mathematical Sciences, 2007-05-01)The design of elastic structures to optimize strength and economy of materials is a fundamental problem in structural engineering and related areas of applied mathematics. In this article we explore a finite dimensional ... -
An Effective Deflected Subgradient Optimization Scheme for Implementing Column Generation for Large-Scale Airline Crew Scheduling Problems
(INFORMS, 2008)We present a new deflected subgradient scheme for generating good quality dual solutions for linear programming (LP) problems and utilize this within the context of large-scale airline crew planning problems that arise ... -
An Optimal Constrained Pruning Strategy for Decision Trees
(INFORMS, 2009)This paper is concerned with the optimal constrained pruning of decision trees. We present a novel 0-1 programming model for pruning the tree to minimize some general penalty function based on the resulting leaf nodes, and ... -
An Algorithm for Fast Generation of Bivariate Poisson Random Vectors
(INFORMS, 2010)We present the "trivariate reduction extension" (TREx)-an exact algorithm for the fast generation of bivariate Poisson random vectors. Like the normal-to-anything (NORTA) procedure, TREx has two phases: a preprocessing ... -
The Nested Event Tree Model with Application to Combating Terrorism
(INFORMS, 2010)In this paper, we model and solve the strategic problem of minimizing the expected loss inflicted by a hostile terrorist organization. An appropriate allocation of certain capability-related, intent-related, vulnerability-related, ... -
Integrated Airline Schedule Design and Fleet Assignment: Polyhedral Analysis and Benders' Decomposition Approach
(INFORMS, 2010)The main airline operations consist of schedule planning, fleet assignment, aircraft routing, and crew scheduling. To improve profitability, we present in this paper an integrated fleet assignment model with schedule ...
