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Articles 1  30 of 34
FullText Articles in Operations Research, Systems Engineering and Industrial Engineering
Value Of Speed In Public Transit Services, Vukan R. Vuchic, G Bruce Douglas Iii, Bondada V.A Murthy
Value Of Speed In Public Transit Services, Vukan R. Vuchic, G Bruce Douglas Iii, Bondada V.A Murthy
Departmental Papers (ESE)
High speed is always a desirable feature of public transportation services. Any measure that increases public transport speeds results in benefits to users in tenns of saved travel time, and benefits to the operator in reduced operating costs and in eventual reduction of fleet size.
At the same time, it is known that some major efforts for increasing speeds, often involving considerable cost (such as increasing maximum technical speed of vehicles) result in relatively small increases in average passenger travel speed. This problem is common for a number of different modes of transportation. An excellent example can be found in ...
Federation Of Transit Agencies As A Solution For Service Integration, Wolfgang S. Homburger, Vukan R. Vuchic
Federation Of Transit Agencies As A Solution For Service Integration, Wolfgang S. Homburger, Vukan R. Vuchic
Departmental Papers (ESE)
Inadequate organization of public transport services in urban areas, particularly in the large ones, is one of the major reasons for the unsatisfactory level of service and economic problems of the operating companies. Despite the current trend toward mergers of transit operators into large public agencies, the services in most cities remain fragmented in various degrees; integration is often not in sight due to organizational problems which appear insurmountable. Losses to the users, various degrees; integration is often not in sight due to organization.
This article briefly analyzes the reasons for this situation, explores its consequences and their importance ...
Recursive Estimation Of System Parameters, Lucian M. Heacox
Recursive Estimation Of System Parameters, Lucian M. Heacox
Theses and Dissertations
A study of recursive estimation of parameters in a secondorder, discretetime periodic system is presented. A recursive procedure combines the current observation of a state variable with the preceeding estimate to generate a new estimate. The thesis indicates an industrial application of parameter estimation, shows how a given interpretation of a secondorder system can impose constraints on the range of the parameter estimates, derives a recursive estimation procedure which approximates the optimal differentialcorrection procedure, and compares the derived method with tow methods recommended in the literature.
On The Computational Efficiencies Of The PrimalDual Algorithm And The UvMethod For Solving Transportation Problems, Taylan Algon
On The Computational Efficiencies Of The PrimalDual Algorithm And The UvMethod For Solving Transportation Problems, Taylan Algon
Theses and Dissertations
Computational efficiencies of the primaldual algorithm and the uvmethod in solving transportation problems are compared in this thesis. A computer program was written in Fortran IV and run on the CDC 6400 system; it generated random problems with integer constants ranging in the size from 5X10 to 30 X 50, and solved them by both methods.
An Empirical Formula For Predicting The Depth Of Hardness Durign Induction Hardening, Parimal P. Shah
An Empirical Formula For Predicting The Depth Of Hardness Durign Induction Hardening, Parimal P. Shah
Theses and Dissertations
The prediction of the depth of hardness in terms of power density and scanning rate has been one of the central problems of interest in induction hardening of cylindrical parts like Axel Shafts, Piston Pins, Torsion Bars and King Pins. In this thesis an empirical relationship is developed that can be used to predict the depth of hardness for AISI C 1045 normalized steel once the hardening conditions have been selected and without the necessity of conducting a trial hardening operation, thus saving electrical power, generator and scanning machine time.
Practical Aspects Of A MultiStage Loading Model Using The Decomposition Principle, R. G. Langmacher
Practical Aspects Of A MultiStage Loading Model Using The Decomposition Principle, R. G. Langmacher
Theses and Dissertations
A multiproduct, multiperiod loading model with deterministic demands is developed and solved. The method used for solving the model is the Decomposition Principle for Linear Programming developed by Dantzig and Wolfe. In addition, a procedure suggested by Samuel Eilon for considering setup times varying with the product mix, is modified and incorporated into the solution procedure.
An Investigation Of The Use Of Gert (Graphical Evaluation And Review Technique) For Production System Analysis, Stephen Leroy Smith
An Investigation Of The Use Of Gert (Graphical Evaluation And Review Technique) For Production System Analysis, Stephen Leroy Smith
Theses and Dissertations
An investigation is conducted into the adaptation of the Graphical Evaluation and Review Technique (GERT) for effective use in the analysis of a production system. Current methods and procedures are utilized, with extensions made for further computational ability. Inprocess inventory level, throughput flow time and individual facilty sensitivity are found for a given arrival rate of units to a system.
A Computerized System For Testing Integer Programming Algorithms, Merle Lowell Ehlers
A Computerized System For Testing Integer Programming Algorithms, Merle Lowell Ehlers
Theses and Dissertations
Integer programming is currently enjoying an increase in interest due in no small part to the potential use of high speed computer equipment to solve heretofore unmanageable prolem. The development and analysis of integer programming algorithms are presently restricted to small size problems. This limitation is also a concern of potential users of these algorithms. To use the algorithms successfully the user must know how these algorithms perform on the type and size of problems with which he is concerned.
Matrix Model For Evaluating Management Information Systems With Consideration Of The Time Relationships Of Data And Reports, W. M. Howe
Theses and Dissertations
The subject considered in this paper is the temporal relationship of data flow through an information system and how this flow may be described by a mathematical model.
A Comparison Of TimeSharing And Batch Processing Through An Analysis Of Programming Errors, Donald M. Jackson
A Comparison Of TimeSharing And Batch Processing Through An Analysis Of Programming Errors, Donald M. Jackson
Theses and Dissertations
This thesis describes an experiment conducted to compare the response and performance of a programmer under the two current modes of program development: conversational timesharing and batch processing. The research reported herein had two specific objectives. First to develop a procedure for identifying, classifying, and analyzing programming errors as a measure of performance, and secondly to ascertain experimentally if certain types of programming errors are more frequently occuring and more difficult to correct under conversational timesharing than under the batch mode of processing.
An Investigation Of The Performances Of Two Alternative Timekeeping Models For Simulation, Darell Riley Zerbe
An Investigation Of The Performances Of Two Alternative Timekeeping Models For Simulation, Darell Riley Zerbe
Theses and Dissertations
An investigation was conducted of the relative efficiences of two alternative methods for simulation: a fixed time increment model and a variable time increment model. Special attention is given to the effects of 4 factors: the relative frequency of events per unit of simulated time, the utilization ratio of the service facility, the distribution of service times, and the distribution of interarrival times.
An Investigation Of An Implicit Enumeration Technique Using Imbedded Linear Programming To Solve The Zero One Scheduling Problem, Merrick H. Cooperman
An Investigation Of An Implicit Enumeration Technique Using Imbedded Linear Programming To Solve The Zero One Scheduling Problem, Merrick H. Cooperman
Theses and Dissertations
A computational procedure for obtaining the minimum makespan solution for scheduling N jobs through M machines with job start constraints, due date constraints, and job passing allowed is investigated concerning the method of bringing jobs into solution.
The Economic Design Of Control Limits For Cumulative Sum Charts, Allyn Keith Dusek
The Economic Design Of Control Limits For Cumulative Sum Charts, Allyn Keith Dusek
Theses and Dissertations
"The use of threesigma limits with Shewhart charts became a dogma and it would be unfortunate if a similar sort of dogma were to arise for cumulative sum charts."  E. S. Page The preceding statement implies the need for a method of selecting cumulative sum control limits so that the limits are unique to the process for which they were designed.
A Statistic Based On Standardized Squared Deviations For Testing Normality, G. Lyndon Berry
A Statistic Based On Standardized Squared Deviations For Testing Normality, G. Lyndon Berry
Theses and Dissertations
A new statistic is proposed which will be useful as a test for normality. The statistic is easy to calculate from a random sample of any size without a need to know or estimate the population parameters and exhibits a double sided characteristic, making it capable of discriminating between bimodal and skewed types of nonnormality.
The Utility Of Information A Method Of Evaluation, Larry Lee Mengel
The Utility Of Information A Method Of Evaluation, Larry Lee Mengel
Theses and Dissertations
The fundamental relationships among the design parameters of an information system and the utility of the information that a system produces are analyzed in an effort to develop a methodology for measuring the utility of information. The utility of the information is defined as a measure of the effectiveness with which the information can be employed to attain the objectives of the using organization.
Fertilizer Production Functions Up To Fourth Order From Experimental Data Applied In Profit Maximization, SupplyDemand Relationships And Marginal Rates Of Substitution For Land, Sati Prasad Bose
Retrospective Theses and Dissertations
No abstract provided.
Locating Warehouses In A MultiProduct Environment, Andrew J. Dachel
Locating Warehouses In A MultiProduct Environment, Andrew J. Dachel
Theses and Dissertations
A method for determining a nearoptimal configuration of warehouse locations is developed in view of multiproduct requirements. Warehouses and plants are considered to be limited in their capability to produce or process multiple goods, customers are considered to have requirements for multiple products. The cost components of interest are those relating to the distribution of product; namely, fixed and variable costs of warehouse operation and transportation rates.
A Simulation Study To Determine The Optimum Number Of Cells And Expectancy Content Required For The ChiSquare GoodnessOfFit Test, Lawrence Berry Gallucci
A Simulation Study To Determine The Optimum Number Of Cells And Expectancy Content Required For The ChiSquare GoodnessOfFit Test, Lawrence Berry Gallucci
Theses and Dissertations
The ChiSquare GoodnessofFit Statistic is sensitive to the particular partitioning scheme used to divide the hypothesized distribution into cells, viz., number of cells, cell width, and the minimum number of expectancies required per cell. This sensitivity is due to the fact that different partitionings produce different groupings of the random observations and the calculated expected frequencies on which the ChiSquare test statistic is derived.
Development Of A Manufacturing Progress Function To Include The Transferability Of Progress In Order To Relate To Dual Sourcing Within A Firm, W. D. Russ
Theses and Dissertations
The applicability of Progress Function concepts to the problem of dual sourcing a product at two manufacturing facilities within a firm is considered. Using Progress Function concepts, a model is formulated which considers the transfer of progress or knowhow from the original manufacturing facility to the second facility. Manufacturing data on five products, dual sourced within a firm, are used to evaluate the model.
Computational Aspects Of Dynamic Programming Applied To The One Period, One Dimension Allocation Model, James Williams Lowe
Computational Aspects Of Dynamic Programming Applied To The One Period, One Dimension Allocation Model, James Williams Lowe
Theses and Dissertations
The one period, one dimension allocation model is described and developed mathematically. Two computational difficulties are investigated. If enumeration is used to progress from stage to stage through the model, then no difference could be found in the allocations due to the order of consideration of the projects. The projects may be numbered in an arbitrary manner and the allocations and the resulting total returns will be the same.
An Impact Enumeration Algorithm For Solving The Generalized Scheduling Problem With Scarce Resources, V. W. Wood
An Impact Enumeration Algorithm For Solving The Generalized Scheduling Problem With Scarce Resources, V. W. Wood
Theses and Dissertations
Scheduling problems with scarce resources occur frequently in industry. There is a need for good solutions to these problems using efficient solution techniques. The generalized scheduling problem with scarce resources is formulated in terms of a zeroone integer programming problem. A computational procedure which optimally solves problems of this type is developed in this paper.
Survey, Analysis And Evaluation Of Inventory Control Models, Ashok K. Malik
Survey, Analysis And Evaluation Of Inventory Control Models, Ashok K. Malik
Theses and Dissertations
Scientific inventory control is generally understood to be the use of mathematical and simulation models to obtain rules for operating inventory systems. The development of some models have practical applicaiton as an immediate objective. And some models present interesting theoretical problems in mathematics.
A Study Of The Effect Of Thye Rate Of Cutting Fluid (Coolant) Application On Flank Tool Wear And Surface Roughness With Carbide Cutting Tool, S. Doraiswamy
Theses and Dissertations
In this investigation, a study was made on the effect of the rate of cutting fluid application (coolant) on the cutting performance of a carbide cutting tool both in terms of flank tool wear, and surface roughness imparted to the workpiece in a lathe turning operation. Keeping the work material and cutting tool material the same, experiment was performed for various flow rates, at various cutting speeds, with different feeds, and depth of cuts representing both rough and finish type of cuts.
Fault Detection Of Microcircuits With Graphical Evaluation And Review Technique, Lucius J. Riccio
Fault Detection Of Microcircuits With Graphical Evaluation And Review Technique, Lucius J. Riccio
Theses and Dissertations
The purpose of this thesis is to demonstrate that electronic microcircuits can be modeled using GERT, Graphical Evaluation and Review Technique. It is shown that microcircuits can be modeled and simulated quickly and easily with the aid of NASA's GERTS II Program. The value of this skill is clearly visable to fault analysis.
Development Of A Dynamic Programming Model That Allocates Component BurnIn Times For Improving Electronic Equipment System Reliability On An Economic Basis, William Robert Batchelder
Development Of A Dynamic Programming Model That Allocates Component BurnIn Times For Improving Electronic Equipment System Reliability On An Economic Basis, William Robert Batchelder
Theses and Dissertations
The purpose of this study is to investigate the electronic equipment component burnin system reliability improvement technique to determine the economic factors that should be considered when assigning component burnin times in an economically optimal manner. The pertinent economic factors are found to be the procurement costs of the components, the costs of burningin the components, and the costs associated with a failure of the equipment under consideration in an operational situation.
An Investigation Into The Effects Of Partitioning The Facilities Assignment Problem By Hierarchical Clustering Methods, Charles Henry Blackburn Iii
An Investigation Into The Effects Of Partitioning The Facilities Assignment Problem By Hierarchical Clustering Methods, Charles Henry Blackburn Iii
Theses and Dissertations
This thesis considers the possibility of partitioning larger problems by clustering the facilities according to the hierarchy of their mutual flows. Two different methods of accomplishing this clustering are developed and evaluated. A model is developed to partition the problem by these methods and to use a branch and bound algorithm at two levels. One level arranges the clusters in an optional manner and the second level arranges the facilities within the clusters.
An Application Of Gert, Graphical Evaluation And Review Technique, In An Economic Analysis Of The Product Life Cycle Of A Reparable Item, Allan D. Marsh
An Application Of Gert, Graphical Evaluation And Review Technique, In An Economic Analysis Of The Product Life Cycle Of A Reparable Item, Allan D. Marsh
Theses and Dissertations
This paper presents an application of GERT in an economic analysis of the product life cycle of a reparable item. The life cycle of the product has been modelled as a semiMarkov process defined by parameters of transition probabilities, transition time distributions, and transition costs. GERT, a set of procedures which can bde applied to certain types of networks, is used to analyze this network model.
Minicar Transit System Final Report, Vukan R. Vuchic, Donald Bergmann, G. Bruce Douglas Iii, Bondada V.A Murthy
Minicar Transit System Final Report, Vukan R. Vuchic, Donald Bergmann, G. Bruce Douglas Iii, Bondada V.A Murthy
Departmental Papers (ESE)
No abstract provided.
A Systems Model Of A Construction Firm , Donald Edmund Kawal
A Systems Model Of A Construction Firm , Donald Edmund Kawal
Retrospective Theses and Dissertations
No abstract provided.
Systems Reliability Using The Flow Graph, Kenneth Edward Farrier
Systems Reliability Using The Flow Graph, Kenneth Edward Farrier
Dissertations and Theses
The problem of calculating the reliability of a complex system of interacting elements is delineated to a linear system, no element of the system having a reliability distribution in terms of any other e1ement of the system, where only one path is taken through the system at a time. A precise definition is then developed to specify the reliability of the linear, single path at a time, system. A precise and concise generating function is found that effortlessly produces the reliability of the linear, single path at a time, system directly from the reliability flew graph of the system.