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Articles 61 - 90 of 414
Full-Text Articles in Operations Research, Systems Engineering and Industrial Engineering
Implementation Of Nasa's System Engineering Design Process In The Development Of An Optical Guitar Pickup, Stephanie Buckner, Jared Nelson, Ben Fowler, Samuel Hobbs, Chris Kirchner
Implementation Of Nasa's System Engineering Design Process In The Development Of An Optical Guitar Pickup, Stephanie Buckner, Jared Nelson, Ben Fowler, Samuel Hobbs, Chris Kirchner
Von Braun Symposium Student Posters
No abstract provided.
Development Of Stem Tools Using Nasa's Systems Engineering Design Approach, J Chevallier, D Hamilton, B Landers, W Landers, B Setayesh
Development Of Stem Tools Using Nasa's Systems Engineering Design Approach, J Chevallier, D Hamilton, B Landers, W Landers, B Setayesh
Von Braun Symposium Student Posters
No abstract provided.
Genetic Algorithm Based Optim-Al Sizing Of Pv-Diesel-Battery System Considering Co2 Emission And Reliability, Dr. Adel A. Elbaset, Heri Suryoatmojo, Prof. Dr. Takashi Hiyama
Genetic Algorithm Based Optim-Al Sizing Of Pv-Diesel-Battery System Considering Co2 Emission And Reliability, Dr. Adel A. Elbaset, Heri Suryoatmojo, Prof. Dr. Takashi Hiyama
Dr. Adel A. Elbaset
The reliability system concern and CO2 emission reduction are still the main targets of optimization problem in the hybrid generation system components. This pa- per utilizes Genetic Algorithm (GA) method to determine the optimal capacities of PV system, battery bank and diesel generator (DG) unit according to the minimum cost ob- jective functions that relate to these two factors. In this study, the cost objective function includes the annual capital cost (ACC), annual operation maintenance cost (AOM), an- nual replacement cost (ARC), annual fuel cost (AFC), annual emission cost (AEC) and annual customer damage cost (ADC). The proposed method has …
How A Systems Engineer Starts..., Herman Migliore
How A Systems Engineer Starts..., Herman Migliore
Systems Science Friday Noon Seminar Series
Dr. Migliore will review systems engineering as a process for developing products, processes, and services and suggest views that encourage systems thinking. As an example, he will focus on the beginning of the development process, the fuzzy front end, and discuss a method, ConOps, for getting started using examples from PSU's masters program.
Applying Group Theory For Solving Machines’ Turnovers With Capital Budgeting Approach, Hannaneh Rashidi-Bajgan, Taravatsadat Nehzati, Napsiah Ismail
Applying Group Theory For Solving Machines’ Turnovers With Capital Budgeting Approach, Hannaneh Rashidi-Bajgan, Taravatsadat Nehzati, Napsiah Ismail
Hannaneh Rashidi-Bajgan
Applying and utilizing technology in modern manufacturing systems needs to update and upgrade facilities repetitively by efficient ways to stay with great productivity along efficiency. Capital Budgeting Problem (CBP) is one of the most important issues in decision making about capital in manufacturing management; CBP determines the best investments in capital goods such as new plans, replacements, research development projects and other worth pursuing authorization subjects. This problem deals with the amount of revenues as the result of investing in the previous periods in order to maximize the amount of Net Present Value (NPV) on the decision time. Making discussions …
Modelling And Analysis Of Dynamic Capacity Complexity In Multi-Stage Production, Ahmed M. Deif, Hoda A. Elmaraghy
Modelling And Analysis Of Dynamic Capacity Complexity In Multi-Stage Production, Ahmed M. Deif, Hoda A. Elmaraghy
Industrial Technology and Packaging
The uncertainty associated with managing dynamic capacity problem is the main source of its complexity. This article presents a system dynamics approach to model and analyse operational complexity of dynamic capacity in multi-stage production. The unique feature of this approach is that it captures the stochastic nature of three main sources of complexity associated with dynamic capacity. These are the demand, internal manufacturing delay and capacity scalability delay. The developed model was demonstrated by an industrial case study of multi-stage printed circuit board assembly line. The analysis of simulation experiments showed that ignoring complexity sources can lead to wrong decisions …
Accident In Bhopal: Observations 20 Years Later, Ronald J. Willey, Dennis C. Hendershot, Scott Berger
Accident In Bhopal: Observations 20 Years Later, Ronald J. Willey, Dennis C. Hendershot, Scott Berger
Ronald J. Willey
The most influential process safety accident passed its 20th anniversary on Dec 3, 2004. At an international symposium to mark the event in Kanpur, India during the week of this anniversary, process safety practitioners from around the world assembled to discuss progress in resolving the Bhopal tragedy and in advancing the practice of process safety worldwide. This paper reports the main conclusions from the conference, and provides insight into the Bhopal site as attendees found it in December 2004. Since 1984, many positive steps worldwide have been made in regards to improvements in process safety and protection of personnel within …
Effect Of Freeze-Thaw Cycling On The Compression Strength Of Folding Cartons Made From Different Materials, Koushik Saha, Bruce Harte, Gary Burgess, Sujeet Adudodla
Effect Of Freeze-Thaw Cycling On The Compression Strength Of Folding Cartons Made From Different Materials, Koushik Saha, Bruce Harte, Gary Burgess, Sujeet Adudodla
Industrial Technology and Packaging
The quality of frozen food is known to deteriorate in storage due to water migration, in-pack desiccation and frost formation. These same factors can affect folding cartons. The rate of frozen food and folding carton deterioration is further dependent on temperature fluctuations during storage, transportation, loading and unloading. This study was conducted to compare the compression strength of folding cartons made from CNK (Coated Natural Kraft), SBS (Solid Bleached Sulfate), CRP (Coated recycled paperboard) and PCSBS (Poly coated Solid Bleach Sulfate) after subjecting them to multiple freeze-thaw cycles. Compression tests were performed on empty cartons and cartons filled with frozen …
Life Cycle Inventory Comparison Of Paper And Plastic Based Packaging Systems For Strawberry Distribution, Jay A. Singh, Aric Krasowski
Life Cycle Inventory Comparison Of Paper And Plastic Based Packaging Systems For Strawberry Distribution, Jay A. Singh, Aric Krasowski
Industrial Technology and Packaging
The goal of this study was to conduct a life Cycle Inventory (Lei) analysis based comparison of eleven primary container and pillow wrap combinations for the distribution of fresh strawberries Three of the primary containers studied were paper based (molded pulp, paperboard and corrugated fiberboard) and three other containers investigated were clamshells or punnets made of polyethylene terephthalate (PET) and recycled PET (rPET) Pillow wraps made of rPET and polylactlde (PLA) were also Included for all punnet/tray style containers The scope of the study ranged from the extraction of raw materials, their processing and formation for all packaging components, product …
Acuta Enews October 2010, Vol 39, No. 10
Acuta Enews October 2010, Vol 39, No. 10
ACUTA Newsletters
In This Issue
Nominate Now for 2011-2012 Board of Directors
From the President........... Matt Arthur, Washington Univ. in St. Louis, ACUTA President
Nominate Now for ACUTA Institutional Excellence Award
Tech Talk: The Land of Lync'in............... Kevin Tanzillo, Dux PR
That Smarts!
FYI: Useful Information from the Campus......... Student Monitor
ACUTA Surveys Voice and Emergency Systems........... Ray Horak, The Context Corporation
Learn More about UC, WiFi, FMC, Green IT and More from Your Desktop
Visit the ACUTA Community Often!
Board Report........... George Denbow, Univ. of Texas, ACUTA Secretary/Treasurer
Washington Update Newsletter
Overheard on the Listserv: It's All about Access
In Memory: …
Emotional Intelligence And Its Potential In Engineering Management, Jesse Ray Toepfer
Emotional Intelligence And Its Potential In Engineering Management, Jesse Ray Toepfer
Engineering Management & Systems Engineering Theses & Dissertations
Assuming that the modern connotation of Emotional Intelligence (El) took shape with Wayne Leon Payne's 1986 dissertation, A Study of Emotion: Developing Emotional Intelligence, Self-Integration, Relating to Fear, Pain, and Desire, EI is nearing its thirtieth birthday. Relatively speaking, EI is still very young, and there are a handful of researchers who are still trying to explore and define El. Significant efforts have been made to develop the concept of EI, and the ramifications of EI on an individual's professional performance.
Often more technical and exacting in nature, the field of engineering management exhibits many aspects that are unique relative …
A Stochastic Inventory Management Approach In The Disassembly Line Portion Of Reverse Logistics, Badr O. Johar, Surendra M. Gupta
A Stochastic Inventory Management Approach In The Disassembly Line Portion Of Reverse Logistics, Badr O. Johar, Surendra M. Gupta
Surendra M. Gupta
Reverse logistics is a critical topic that has captured the attention of government, private entities and researchers in recent years. This increase in the concern was driven by current set of government regulations, increase of public awareness, and the attractive economic opportunities. As a result, many corporations have started to comprehend the importance of the recovery process and are taking serious steps in restructuring their supply chain processes to meet the new regulations such as limitations on waste disposal and recycling requirements [1]. Because of the unique problems associated with reverse supply chain and the complex nature of the reverse …
Analysis Of A Kanban Controlled Disassembly Line With Sensor Embedded Products, Mehmet Ali Ilgin, Surendra M. Gupta
Analysis Of A Kanban Controlled Disassembly Line With Sensor Embedded Products, Mehmet Ali Ilgin, Surendra M. Gupta
Surendra M. Gupta
The use of sensors in the detection of non-functional or missing components in a product before disassembling it is a promising approach to deal with the high level uncertainty associated with disassembly yield. This study presents a quantitative assessment of the impact of the sensor embedded products on the various performance measures of a kanban-controlled disassembly line. First, two separate design of experiments studies based on Orthogonal Arrays are carried out for the cases with and without sensor embedded products. Then, the results of paired-t tests comparing two cases based on different performance measures are presented.
Analysis Of Remanufacturing Policy With Consideration For Returned Products Quality, Kenichi Nakashima, Surendra M. Gupta
Analysis Of Remanufacturing Policy With Consideration For Returned Products Quality, Kenichi Nakashima, Surendra M. Gupta
Surendra M. Gupta
This paper deals with the product acquisition control problem and considers returned product quality with two types of classes. The system includes the flow of the product returns from customers to the factory as well as the forward flow of the sales. We formulate the acquisition problem together with product quality and stochastic demand using the Markov decision process. A numerical example is given to show the implementation of the methodology.
The Effect Of Disassembly Process On Spare Parts Inventory Management In Post Product Life Cycle, Mehmet Ali Ilgin, Surendra M. Gupta
The Effect Of Disassembly Process On Spare Parts Inventory Management In Post Product Life Cycle, Mehmet Ali Ilgin, Surendra M. Gupta
Surendra M. Gupta
Timely and cost-effective acquisition of spare parts at post product life cycle (PPLC) is a challenging task due to limited supply of new spare parts. The most commonly used solution to this problem is the placement of a final order in the beginning of PPLC. Another alternative is the use of disassembled parts from End of Life (EOL) products. In this study, we consider both alternatives at the same time. First, a detailed discrete event simulation (DES) model of a disassembly line is developed. Then, a Genetic Algorithm (GA) is integrated with the DES model for the optimization of Final …
Disassembly Of Sensor Embedded Products With Component Discriminating Demand, Mehmet Ali Ilgin, Surendra M. Gupta
Disassembly Of Sensor Embedded Products With Component Discriminating Demand, Mehmet Ali Ilgin, Surendra M. Gupta
Surendra M. Gupta
There is a high level uncertainty associated with disassembly yield due to existence of unfunctional and/or unneeded components in end of life products. Sensors embedded in critical components of a product can deal with this uncertainty by providing information on the type and condition of the components prior to disassembly. This study presents a quantitative assessment of the impact of sensor embedded products (SEPs) on the various performance measures of a kanban-controlled washing machine disassembly line. First, separate design of experiments studies based on orthogonal arrays are performed for the cases with and without SEPs. Then, the results of paired-t …
Preemptive Goal Programming For Solving The Multi-Criteria Disassembly-To-Order Problem Under Stochastic Yields, Limited Supply, And Quantity Discount, Amre Z. Massoud, Surendra M. Gupta
Preemptive Goal Programming For Solving The Multi-Criteria Disassembly-To-Order Problem Under Stochastic Yields, Limited Supply, And Quantity Discount, Amre Z. Massoud, Surendra M. Gupta
Surendra M. Gupta
This paper considers the disassembly-to-order (DTO) problem where end-of-life (EOL) products are purchased for disassembly in order to satisfy the demand for specified numbers of components. Previous work in the literature solved the DTO problem with multiple uncertainties under a single objective while others solved the multi-criteria model with a single uncertainty. This paper develop a multi-criteria DTO model that would takes into consideration multiple system uncertainties and variability. The multi-criteria DTO model was solved using preemptive goal programming (PGP). The main objective was to determine optimal number of take-back EOL products in every period from each supplier in order …
Use Of Crystal Ball® To Predict Profitability Of A Reverse Supply Chain, Kishore K. Pochampally, Surendra M. Gupta, Tej S. Dhakar
Use Of Crystal Ball® To Predict Profitability Of A Reverse Supply Chain, Kishore K. Pochampally, Surendra M. Gupta, Tej S. Dhakar
Surendra M. Gupta
Traditionally, firms have been spending significant time and money in improving their forward supply chains while ignoring their potential reverse supply chains. However, in today’s competitive business environment, it is important that firms study the profitability and benefits of implementing a reverse supply chain while considering the uncertainties associated with the supply and composition of used products, disassembly time, recycling/remanufacturing time, and demand for recycled/remanufactured goods. In this paper, we demonstrate how a simulation software package, Crystal Ball®, can be used to help a firm predict whether investment in a reverse supply chain is profitable with respect to a given …
A Genetic Algorithm Approach To End-Of-Life Disassembly Sequencing For Robotic Disassembly, Ahmed Elsayed, Elif Kongar, Surendra M. Gupta
A Genetic Algorithm Approach To End-Of-Life Disassembly Sequencing For Robotic Disassembly, Ahmed Elsayed, Elif Kongar, Surendra M. Gupta
Surendra M. Gupta
End-of-life (EOL) processing options include reuse, remanufacturing, recycling and proper disposal. In almost all cases, a certain level of disassembly may be required due to possible changes in the original product structure. Thus, finding an optimal or near optimal disassembly sequence is crucial to increasing the efficiency of the process. Disassembly operations are labor intensive, can be costly, have unique characteristics and cannot be considered as reverse of assembly operations. Since the complexity of determining the best disassembly sequence increases as the number of parts of the product grow, an efficient methodology is reuired for disassembly sequencing. In this paper, …
Minimization Of Costs In Interconnected Supply Networks With Transportation And Decision-Making Delays, Ilker I. Delice, Rifat Sipahi, Tucker J. Marion
Minimization Of Costs In Interconnected Supply Networks With Transportation And Decision-Making Delays, Ilker I. Delice, Rifat Sipahi, Tucker J. Marion
Rifat Sipahi
No abstract provided.
Stability Analysis Of A High Dimensional Supply Network With 5 Delays, Rifat Sipahi
Stability Analysis Of A High Dimensional Supply Network With 5 Delays, Rifat Sipahi
Rifat Sipahi
No abstract provided.
Stability Analysis Of A Lti-Tds Dynamics With Four (4) Independent Delays, Rifat Sipahi
Stability Analysis Of A Lti-Tds Dynamics With Four (4) Independent Delays, Rifat Sipahi
Rifat Sipahi
No abstract provided.
Stability Of Traffic Flow Behavior With Distributed Delays Modeling The Memory Effects Of The Drivers, Rifat Sipahi, Fatihcan M. Atay, Silviu-Julian Niculescu
Stability Of Traffic Flow Behavior With Distributed Delays Modeling The Memory Effects Of The Drivers, Rifat Sipahi, Fatihcan M. Atay, Silviu-Julian Niculescu
Rifat Sipahi
Stability analysis of a single-lane microscopic car-following model is studied analytically from the perspective of delayed reactions of human drivers. In the literature, the delayed reactions of the drivers are modeled with discrete delays, which assume that drivers make their control decisions based on the stimuli they receive from a point of time in the history. We improve this model by introducing a distribution of delays, which assumes that the control actions are based on information distributed over an interval of time in history. Such an assumption is more realistic, as it takes into consideration the memory capabilities of the …
An Alternative Characterization Of Robust Stability And Stability Radius For Linear Time Delay Systems, Bahram Shafai, Hanai Sadaka, Rifat Sipahi, Jie Chen
An Alternative Characterization Of Robust Stability And Stability Radius For Linear Time Delay Systems, Bahram Shafai, Hanai Sadaka, Rifat Sipahi, Jie Chen
Rifat Sipahi
No abstract provided.
Stability Of A Linear Time Invariant Dynamics With 3 Independent Delays, Rifat Sipahi
Stability Of A Linear Time Invariant Dynamics With 3 Independent Delays, Rifat Sipahi
Rifat Sipahi
No abstract provided.
First Order Approximation Of The Stability Regions Of Time Delay Systems -- Removed From View At The Discretion Of Northeastern University Libraries (9/16/2010), Rifat Sipahi, Silviu-Julian Niculescu
First Order Approximation Of The Stability Regions Of Time Delay Systems -- Removed From View At The Discretion Of Northeastern University Libraries (9/16/2010), Rifat Sipahi, Silviu-Julian Niculescu
Rifat Sipahi
No abstract provided.
Delay Modeling In Supply Network Dynamics: Performance, Synchronization, Stability, Rifat Sipahi
Delay Modeling In Supply Network Dynamics: Performance, Synchronization, Stability, Rifat Sipahi
Rifat Sipahi
Recent research results in Industrial Engineering and Business disciplines specifically emphasize the critical role of delays in the functionality of supply networks. Delays are inevitable and pervasive; they arise due to the time needed for material deliveries, information flow and human perception towards adjusting to new decisions. Delays are endangering as they contaminate decision-making which ultimately leads to poor performance, synchronization problems and fluctuating inventory levels resulting in major economical losses. It is critical to state that inventory regulation and synchronization in supply networks even without delays is an open problem today due to large scale of the network, nonlinearities, …
An Efficient Numerical Approach For The Stability Analysis Of A Class Of Lti Systems With Arbitrary Number Of Delays, Rifat Sipahi
An Efficient Numerical Approach For The Stability Analysis Of A Class Of Lti Systems With Arbitrary Number Of Delays, Rifat Sipahi
Rifat Sipahi
Abstract: A practical and numerically efficient algorithm is presented for determining the stability robustness map of a general class of higher order linear time invariant (LTI) systems in the parametric space of arbitrary number of independent delays. The stability of this class of dynamics is of particular interest in low-gain design and multi-agent control problems. The backbone of the new algorithm is inspired by a scaled frequency sweeping technique which enables the exhaustive determination of stability switching hypersurfaces in the parametric space of delays, without requiring nested loops. Two case studies are presented in order to demonstrate the strength of …
Gains In The Life-Cycle Of Adaptable, Self-Organizing Material Handling Systems, Jan R. Nopper, Guido Follert, Michael Ten Hompel
Gains In The Life-Cycle Of Adaptable, Self-Organizing Material Handling Systems, Jan R. Nopper, Guido Follert, Michael Ten Hompel
11th IMHRC Proceedings (Milwaukee, Wisconsin. USA – 2010)
Compared to conventional material flow controls, self-organized material handling systems and the Internet of Things in facility logistics promise several advantages during the life-cycle. Most important is the increased adaptability in case of expansions or modifications due to a consistent modular design; this also promotes an increased robustness due to clearly defined interfaces and a decreased complexity of each module. The use of RFID technology increases the availability of real-time data about the system and the transported units. However, the introduction of self-organized material handling systems also causes costs, e.g. for necessary RFID tags and readers. Against this background, it …
A Real-Time Picking And Sorting System In E-Commerce Distribution Centers, Yeming Gong, Erik M. M. Winands, Rene B. M. De Koster
A Real-Time Picking And Sorting System In E-Commerce Distribution Centers, Yeming Gong, Erik M. M. Winands, Rene B. M. De Koster
11th IMHRC Proceedings (Milwaukee, Wisconsin. USA – 2010)
Order fulfillment is the most expensive and critical operation for companies engaged in e-commerce. E-commerce distribution centers must rapidly organize the picking and sorting processes during and after the transaction has taken place, with the ongoing need to create greater responsiveness to customers. Sorting brings a relatively large setup time, which cannot be well admitted by existing polling models. We build a new stochastic polling model to describe and analyze such systems, and provide approximate explicit expressions for the complete distribution of order line waiting time for polling-based order picking systems and test their accuracy. These expressions lend themselves for …