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Articles 151 - 180 of 408
Full-Text Articles in Operations Research, Systems Engineering and Industrial Engineering
A Database Design For Cvs Pharmacy's Patterson, California Distribution Center, Jason Kenneth Okajima
A Database Design For Cvs Pharmacy's Patterson, California Distribution Center, Jason Kenneth Okajima
Industrial and Manufacturing Engineering
CVS Pharmacy’s Patterson, California Distribution Center did not have an efficient and cost effective method for auditing shipped out products. The purpose of this project was to create a new system and procedure for the Patterson Distribution Center to audit shipped out container totes. The distribution center’s original method was slow, inefficient, and involved paper waste, considerable travel time, and several manual procedures. This project was meant to develop a new process and database system to provide a solution to their problem. The end goal of this project was to implement the designed method and system of auditing for daily …
Ackermann Steering Geometry Applied To A Skateboard Truck, Daniel D. Downs
Ackermann Steering Geometry Applied To A Skateboard Truck, Daniel D. Downs
Industrial and Manufacturing Engineering
Conventional skateboard trucks are currently unable to meet the challenges of the modern enthusiast. They are lacking in key performance metrics such as handling, stability, and traction. Longboard enthusiasts, whom rely heavily on handling performance, are hungry for new and innovative technology to help bring the sport to the next level. The aim of this project was to solve these problems by applying specific aspects of automotive steering geometry and best engineering practices. Three successive prototypes were designed, with the first two prototype sets being manufactured and extensively tested. The first prototype served as a proof of concept, but suffered …
Antique Aircraft Avionics Modernization: Process And System Design For A Transponder Installation In A 1946 Luscombe 8a, Nicholas Camacho
Antique Aircraft Avionics Modernization: Process And System Design For A Transponder Installation In A 1946 Luscombe 8a, Nicholas Camacho
Industrial and Manufacturing Engineering
The general aviation population is full of vintage aircraft. Built in the heyday of personal aviation, these machines embody the spirit of aviation; freedom afforded from the everyday monotony of earthbound people. As technology advanced and air traffic became more congested, new requirements were set forth by governing bodies to ensure the safety of aircraft. These regulations limited the capability of vintage general aviation aircraft. This report was commenced to understand the necessary steps required to add modern technology to old aircraft, as well as design a system that would enhance the capability of vintage aircraft while keeping their antique …
Chevrolet Upper Control Arm Re-Design, Christopher Mclean
Chevrolet Upper Control Arm Re-Design, Christopher Mclean
Industrial and Manufacturing Engineering
The purpose of this project is to design and manufacture an improved upper control arm for a 1988-1998 Chevrolet K2500 truck. This component controls the suspension of a vehicle and will be redesigned to improve the many shortcomings of the current design. The objectives of this project were met by redesigning the stock upper control arm, designing and manufacturing a weld fixture, manufacturing a prototype component, and performing a cost analysis. This component was designed to improve performance, reliability, serviceability and strength while maximizing manufacturability. The fixture and upper control arm were manufactured using computer aided design, CNC methods and …
Cardiac Staging Facility Workflow Redesign, Ryan Chang
Cardiac Staging Facility Workflow Redesign, Ryan Chang
Industrial and Manufacturing Engineering
This study analyzes and proposes Cardiac Staging nurse workflow improvements along with a new Cardiac Staging facility design at French Hospital. Currently, patients spend an expected 125 minutes in Cardiac Staging. It was found that 60% of the time in Cardiac Staging was spent waiting to be transferred into the Cath Lab. The following Industrial Engineering methods were utilized to eliminate waste in staging and design a new staging area:
Use of Lean and Six-Sigma tools to recommend new patient arrival time
Manufacturing product scheduling to reduce patient wait time
Use of facility redesign techniques to improve …
The Analysis Of Electure Creation & Distribution Systems At Cal Poly, Jason Carian
The Analysis Of Electure Creation & Distribution Systems At Cal Poly, Jason Carian
Industrial and Manufacturing Engineering
This report details the analysis of potential eLecture creation and distributions for Cal Poly San Luis Obispo. Specifically, this project will focus on a system for the College of Engineering. This project was completed using the Systems Engineering process and concentrated more specifically on the Systems Evaluation phase, in which the specifics for potential system solutions are discussed. The first step was to define the problem that must be addressed; Cal Poly currently uses eLectures in the classroom, but with the wide variety of eLecture creator and distribution alternatives available, there is no optimal system at the University. The next …
The Ergo Knife Manufacturability Project: A Prosthetic Device, Caleb Sarris
The Ergo Knife Manufacturability Project: A Prosthetic Device, Caleb Sarris
Industrial and Manufacturing Engineering
Millions of Americans’ upper extremities have been rendered useless or amputated due to injury or illness. Without strength and dexterity in the hand or wrist, these people are in need of tools to help them in everyday activities. The Ergo Knife offers these individuals a way to cope with this way of life as a device that can assist them, primarily in food consumption and can also be expanded to many other applications. The purpose of this project is to further develop the Ergo Knife so that it can better assist these individuals and improve the necessary processes used to …
Preference-Driven Assignment Decision-Support System For Multiple Sets Of Pairs, Stephen J. Gilmore
Preference-Driven Assignment Decision-Support System For Multiple Sets Of Pairs, Stephen J. Gilmore
Industrial and Manufacturing Engineering
This project focuses on designing a computerized decision support system (DSS) to assist the Cal Poly Alumni Association with scheduling their Mustang Mentoring day. The current scheduling process is time intensive, error prone, and does not consider student preferences. The decision support system optimally generates multiple sets of pairs of students and mentors and schedules them avoiding conflicts and duplicates. The system was developed in Microsoft Excel using its Solver add-in. Excel was selected as the system platform also because of its relative popularity compared to alternative platforms. The DSS utilizes integer linear programming to maximize the total student satisfaction …
Rfid Classroom Management System, Andrew W. Wright
Rfid Classroom Management System, Andrew W. Wright
Master's Theses
Professors who manage large classes are unrealistically expected to grade each student fairly and accurately. Even with all of the technological advancements that have occurred in the past thirty years, very little progress has been made in classroom management, and as a result, professors are not equipped with enough tools to successfully manage large class sizes. Because radio frequency identification (RFID) technology is making its way into student issued identification cards, there is an opportunity to use it as a tool to aid professors in the classroom. The focus of this paper is to discover the most effective system that …
An Optimization Approach To Employee Scheduling Using Fuzzy Logic, William G. Spence
An Optimization Approach To Employee Scheduling Using Fuzzy Logic, William G. Spence
Master's Theses
An Optimization Approach to Employee Scheduling Using Fuzzy Logic
William G. Spence
Selection of sales employees is critical because the sales employees represent the company’s image, competitive advantage, technology, and values. In many service systems the majority of consumer contact is with the sales department. Since there are different types of customers, scheduling quality salespersons who can adequately help consumers may affect revenue.
This thesis proposes a new methodology for the scheduling of employees in a service system. The methodology uses Fuzzy Logic to calculate possible sales and Linear Programming to create an optimal schedule. This approach enables the rating …
A Feature Based Frequency Domain Analysis Algorithm For Fault Detection Of Induction Motors, Zhaoxia Wang, C. S. Chang, Zhang Yifan
A Feature Based Frequency Domain Analysis Algorithm For Fault Detection Of Induction Motors, Zhaoxia Wang, C. S. Chang, Zhang Yifan
Research Collection School Of Computing and Information Systems
This paper studies the stator currents collected from several inverter-fed laboratory induction motors and proposes a new feature based frequency domain analysis method for performing the detection of induction motor faults, such as the broken rotor-bar or bearing fault. The mathematical formulation is presented to calculate the features, which are called FFT-ICA features in this paper. The obtained FFT-ICA features are normalized by using healthy motor as benchmarks to establish a feature database for fault detection. Compare with conventional frequency-domain analysis method, no prior knowledge of the motor parameters or other measurements are required for calculating features. Only one phase …
Online Fault Detection Of Induction Motors Using Frequency Domain Independent Components Analysis, Zhaoxia Wang, C. S. Chang
Online Fault Detection Of Induction Motors Using Frequency Domain Independent Components Analysis, Zhaoxia Wang, C. S. Chang
Research Collection School Of Computing and Information Systems
This paper proposes an online fault detection method for induction motors using frequency-domain independent component analysis. Frequency-domain results, which are obtained by applying Fast Fourier Transform (FFT) to measured stator current time-domain waveforms, are analyzed with the aim of extracting frequency signatures of healthy and faulty motors with broken rotor-bar or bearing problem. Independent components analysis (ICA) is applied for such an aim to the FFT results. The obtained independent components as well as the FFT results are then used to obtain the combined fault signatures. The proposed method overcomes problems occurring in many existing FFT-based methods. Results using laboratory-collected …
Supervisory Evolutionary Optimization Strategy For Adaptive Maintenance Schedules, Zhaoxia Wang, C. S. Chang
Supervisory Evolutionary Optimization Strategy For Adaptive Maintenance Schedules, Zhaoxia Wang, C. S. Chang
Research Collection School Of Computing and Information Systems
No abstract provided.
The Effectiveness Of Virtual R&D Teams In Smes: Experiences Of Malaysian Smes, Nader Ale Ebrahim, Salwa Hanim Abdul Rashid, Shamsuddin Ahmed, Zahari Taha
The Effectiveness Of Virtual R&D Teams In Smes: Experiences Of Malaysian Smes, Nader Ale Ebrahim, Salwa Hanim Abdul Rashid, Shamsuddin Ahmed, Zahari Taha
Nader Ale Ebrahim
Systems Ideas For The Scientific And Societal Imperatives Of The Coastal Ocean: Case Of The Bp Oil Gusher In The Gulf Of Mexico, Spring & Summer 2010, Christopher Mooers
Systems Ideas For The Scientific And Societal Imperatives Of The Coastal Ocean: Case Of The Bp Oil Gusher In The Gulf Of Mexico, Spring & Summer 2010, Christopher Mooers
Systems Science Friday Noon Seminar Series
In recent decades, great progress has been made in advancing the scientific understanding of the coastal ocean (i.e., the 200 nautical mile Exclusive Economic Zone (EEZ)) across a broad set of disciplines. Simultaneously, the societal use of the coastal ocean has skyrocketed through, for example, increased shipping & boating, sports & commercial fishing, and exploitation of non-living resources, such as, oil & gas extraction and sand & gravel mining. International law and national policy assign coastal nations the responsibility for stewardship (i.e., wise management) of their respective EEZs. The scope of the stewardship and applications can be summarized as (1) …
A-10 Thunderbolt Ii (Warthog) Systems Engineering Case Study, Air Force Center For Systems Engineering, David R. Jacques, Dennis D. Strouble
A-10 Thunderbolt Ii (Warthog) Systems Engineering Case Study, Air Force Center For Systems Engineering, David R. Jacques, Dennis D. Strouble
AFIT Documents
No abstract provided.
The Effectiveness Of Multi-Stage Dehumidification– Humidification For Improving The Cooling Ability Of Evaporative Air Conditioning, Philadelphia University
The Effectiveness Of Multi-Stage Dehumidification– Humidification For Improving The Cooling Ability Of Evaporative Air Conditioning, Philadelphia University
Philadelphia University, Jordan
No abstract provided.
Public Transit Accessibility And Need Indices: Approaches For Measuring Service Gap, Sha Mamun
Public Transit Accessibility And Need Indices: Approaches For Measuring Service Gap, Sha Mamun
Master's Theses
The integration of transit needs into transit accessibility indexing is important for the evaluation of existing transportation systems and, service gaps, and for the identification of priority areas for future investments in transportation infrastructure. This thesis details an accessibility-based transit need indexing model that focuses on the necessity of evaluating transit needs and transit accessibility simultaneously. A need index is developed to identify areas in high need of public transit services using economic and socio-demographic information and a composite accessibility index is developed to identify levels of access to transit services and shortcomings in service provision. The need for transit …
Recording Of Elevated Temperature Fatigue Crack Growth Data By Dcpd System, N. Ramachandran, N. Arakere, Tarun Goswami
Recording Of Elevated Temperature Fatigue Crack Growth Data By Dcpd System, N. Ramachandran, N. Arakere, Tarun Goswami
Biomedical, Industrial & Human Factors Engineering Faculty Publications
The growth of "long" fatigue cracks, in α-β titanium alloy forging, subjected to cyclic stresses, is studied in this paper. The fatigue crack growth rate (FCGR) data were recorded at room temperature, 350, 450, 550 and 650°F using the Direct Current Potential Difference (DCPD) technique. The DCPD method, used in this investigation, was found to record and correlate the potential difference in terms of crack growth rate (da/dN) and Mode I stress intensity factor range satisfactorily. Various factors related to error minimization and calibration equations for compact tension specimens have been elaborated. Also discussed were the means to enhance the …
Institutionalization And Structuration: Studying The Links Between Action And Institution, Stephen R. Barley, Pamela S. Tolbert
Institutionalization And Structuration: Studying The Links Between Action And Institution, Stephen R. Barley, Pamela S. Tolbert
Pamela S Tolbert
Institutional theory and structuration theory both contend that institutions and actions are inextricably linked and that institutionalization is best understood as a dynamic, ongoing process. Institutionalists, however, have pursued an empirical agenda that has largely ignored how institutions are created, altered, and reproduced, in part, because their models of institutionalization as a process are underdeveloped. Structuration theory, on the other hand, largely remains a process theory of such abstraction that it has generated few empirical studies. This paper discusses the similarities between the two theories, develops an argument for why a fusion of the two would enable institutional theory to …
Antimicrobial And Antioxidant Activities Of Essential Oil And Methanol Extract Of Matricaria Chamomilla L. From Djibouti, Fatouma M. Abdoul-Latif, Mohamed Nabil, Prosper Edou, Adwa A. Ali, Samatar O. Djama, Louis-Clément Obamé, Mamoudou H. Dicko Prof.
Antimicrobial And Antioxidant Activities Of Essential Oil And Methanol Extract Of Matricaria Chamomilla L. From Djibouti, Fatouma M. Abdoul-Latif, Mohamed Nabil, Prosper Edou, Adwa A. Ali, Samatar O. Djama, Louis-Clément Obamé, Mamoudou H. Dicko Prof.
Pr. Mamoudou H. DICKO, PhD
The essential oil and methanol extracts of Matricaria Chamomilla L. were subjected to screening for their possible antioxidant activity by two complementary test systems, namely 2,2-diphenykpicrylhydrazyl (DPPH) free radical scavenging and β-carotene-linoleic acid assays. BHT was used as positive control in both test systems. In the DPPH test system, the IC50 values of essential oil and methanol extracts were 4.18 and 1.83 μg/ml, respectively. In the β-carotene-linoleic acid system, oxidation was effectively inhibited by M. Chamomilla, the RAA value of essential oil and methanol extracts were 12.69 and 11.37 %, respectively. When compared to BHT, the essential oil and methanol …
A Multi-Commodity Network Flow Approach For Sequencing Refined Products In Pipeline Systems, Rolando José Acosta Amado
A Multi-Commodity Network Flow Approach For Sequencing Refined Products In Pipeline Systems, Rolando José Acosta Amado
Doctoral Dissertations
In the oil industry, there is a special class of pipelines used for the transportation of refined products. The problem of sequencing the inputs to be pumped through this type of pipeline seeks to generate the optimal sequence of batches of products and their destination as well as the amount of product to be pumped such that the total operational cost of the system, or another operational objective, is optimized while satisfying the product demands according to the requirements set by the customers. This dissertation introduces a new modeling approach and proposes a solution methodology for this problem capable of …
Birnbaum Importance Patterns And Their Applications In The Component Assignment Problem, Qingzhu Yao
Birnbaum Importance Patterns And Their Applications In The Component Assignment Problem, Qingzhu Yao
Doctoral Dissertations
The Birnbaum importance (BI) is a well-known measure that evaluates the relative contribution of components to system reliability. It has been successfully applied to tackling some reliability problems. This dissertation investigates two topics related to the BI in the reliability field: the patterns of component BIs and the BI-based heuristics and meta-heuristics for solving the component assignment problem (CAP).
There exist certain patterns of component BIs (i.e., the relative order of the BI values to the individual components) for linear consecutive-k-out-of-n (Lin/Con/k/n) systems when all components have the same reliability p. This study summarizes …
Acuta Enews May 2011, Vol 40, No. 5
Acuta Enews May 2011, Vol 40, No. 5
ACUTA Newsletters
ln This lssue
Corinne Hoch Appointed lnterim Executive Director
From the President: Priorities for 2011-2012 ..............Joe Harrington, Boston College
Donations in memory of Jeri Semer
ACUTA: Getting Personal............................ Jeffry Handat, LSU
View 8 Sessions from the Annual Conference at Your Desktop
Why ACUTA Remains Vital
lT's Funny!
lnfo Links ........... .. Randy Hoyes, Univ. of Northern lowa
Annual Dues lnvoices Mailed May 2
The Daily Grind: What's on Your Desk Today? ....., Jeanne Jansenius, Sewanee, University of the South
Board Report........ George Denbow, Univ. of Texas, Austin
Another Great conference, More Terrific Prizes!
Thanks to Exhibiton and Sponsors at Annual …
Averaged Iterative Water-Filling Algorithm: Robustness And Convergence, Mingyi Hong, Alfredo Garcia
Averaged Iterative Water-Filling Algorithm: Robustness And Convergence, Mingyi Hong, Alfredo Garcia
Mingyi Hong
The convergence properties of the iterative water-filling (IWF) based algorithms have been derived in the ideal situation where the transmitters in the network are able to obtain the exact value of the interference plus noise (IPN) experienced at the corresponding receivers in each iteration of the algorithm. However, these algorithms are not robust because they diverge when there is time-varying estimation error of the IPN, a situation that arises in real communication system. In this correspondence, we propose an algorithm that possesses convergence guarantees in the presence of various forms of such time-varying error. Moreover, we also show by simulation …
Revenue Management For Make-To-Order And Make-To-Stock Systems, Jiao Wang
Revenue Management For Make-To-Order And Make-To-Stock Systems, Jiao Wang
Doctoral Dissertations
With the success of Revenue Management (RM) techniques over the past three decades in various segments of the service industry, many manufacturing firms have started exploring innovative RM technologies to improve their profits. This dissertation studies RM for make-to-order (MTO) and make-to-stock (MTS) systems.
We start with a problem faced by a MTO firm that has the ability to reject or accept the order and set prices and lead-times to influence demands. The firm is confronted with the problem to decide, which orders to accept or reject and trade-off the price, lead-time and potential for increased demand against capacity constraints, …
Distributed Model Shaping For Scaling To Decentralized Pomdps With Hundreds Of Agents, Prasanna Velagapudi, Pradeep Reddy Varakantham, Katia Sycara, Paul Scerri
Distributed Model Shaping For Scaling To Decentralized Pomdps With Hundreds Of Agents, Prasanna Velagapudi, Pradeep Reddy Varakantham, Katia Sycara, Paul Scerri
Research Collection School Of Computing and Information Systems
The use of distributed POMDPs for cooperative teams has been severely limited by the incredibly large joint policy- space that results from combining the policy-spaces of the individual agents. However, much of the computational cost of exploring the entire joint policy space can be avoided by observing that in many domains important interactions between agents occur in a relatively small set of scenarios, previously defined as coordination locales (CLs) [11]. Moreover, even when numerous interactions might occur, given a set of individual policies there are relatively few actual interactions. Exploiting this observation and building on an existing model shaping algorithm, …
Tight Polyhedral Representations Of Discrete Sets Using Projections, Simplices, And Base-2 Expansions, Stephen Henry
Tight Polyhedral Representations Of Discrete Sets Using Projections, Simplices, And Base-2 Expansions, Stephen Henry
All Dissertations
This research effort focuses on the acquisition of polyhedral outer-approximations to the convex hull of feasible solutions for mixed-integer linear and mixed-integer nonlinear programs. The goal is to produce desirable formulations that have superior size and/or relaxation strength. These two qualities often have great influence on the success of underlying solution strategies, and so it is with these qualities in mind that the work of this dissertation presents three distinct contributions.
The first studies a family of relatively unknown polytopes that enable the linearization of polynomial expressions involving two discrete variables. Projections of higher-dimensional convex hulls are employed to reduce …
A Decision Support System For Assessing Conveyance Options And Modeling Passenger Flow In Airport Terminals, Ping-Nan Chiang
A Decision Support System For Assessing Conveyance Options And Modeling Passenger Flow In Airport Terminals, Ping-Nan Chiang
All Dissertations
This dissertation focuses on the use of passenger conveyance systems and modeling passenger flow in airport terminals. The successfully designed airport concourse must perform at a level that meets the needs of its users - the passengers. In this research, we propose a database design methodology that allows key conveyance statistics to be analyzed within specific locations across the airport terminal. Using passenger conveyance observations collected at five North American airports, the database enables airport planners, operators and consultants to assess passenger behavior and conveyance device performance. Results from this section of the research were in direct support of the …
In-Wheel Coupled Suspenison And Drive System For Attitude Control And Vehicle Propulsion, Robert Clippard
In-Wheel Coupled Suspenison And Drive System For Attitude Control And Vehicle Propulsion, Robert Clippard
All Dissertations
The automotive marketplace is a volatile and dynamic system driven by consumer desires, marketing, fuel prices, technology, and legislation. Recently many of these factors have culminated in a common effort to encourage hybrid and electric vehicle development. The technology for electric vehicles has finally found enough maturity to be implemented into consumer based vehicles from hybrid SUVs to high performance sports cars. This expansion in available propulsion systems and vehicle architectures has spurred research and development into new and novel approaches for propulsion as well as systems to provide increased ride comfort.
This work presents a dual electric motor drive …