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Articles 80041 - 80070 of 196448

Full-Text Articles in Engineering

Principles Of Wind Energy Production, Willie Haynes, Dianne Lhotte, Johnetta Moore Jan 2018

Principles Of Wind Energy Production, Willie Haynes, Dianne Lhotte, Johnetta Moore

ENgaging Educators in Renewable enerGY (ENERGY): Lesson Plans & Slideshows (2017-2019)

Three public school teachers designed basic wind turbine energy production tests to help them teach wind energy principles to middle and high school students. Variables affecting wind turbine energy production were identified (distance from wind tunnel, blade design, angle of attack, and wind speed), and experiments were conducted to test each variable. This research aligns with Georgia DOE curriculum standard STEM-FET-3.7: Apply STEM knowledge and skills through hands-on research and lab experiments that are focused upon recreating the inventions and social solutions that were realized in the past, present, and possible future. These experiments will be a part of an …

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Caregiver Assessment Using Smart Gaming Technology: A Preliminary Approach, Garrett Goodman, Tanvi Banerjee, William Romine, Cogan Shimizu, Jennifer Hughes Jan 2018

Caregiver Assessment Using Smart Gaming Technology: A Preliminary Approach, Garrett Goodman, Tanvi Banerjee, William Romine, Cogan Shimizu, Jennifer Hughes

Computer Science and Engineering Faculty Publications

As pre-diagnostic technologies are becoming increasingly accessible, using them to improve the quality of care available to dementia patients and their caregivers is of increasing interest. Specifically, we aim to develop a tool for non- invasively assessing task performance in a simple gaming application. To address this, we have developed Caregiver Assessment using Smart Technology (CAST), a mobile application that personalizes a traditional word scramble game. Its core functionality uses a Fuzzy Inference System (FIS) optimized via a Genetic Algorithm (GA) to provide customized performance measures for each user of the system. With CAST, we match the relative level of …

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Hydro-Climatological Summer Trends In The Continental United States, Naya Mairena Flores Jan 2018

Hydro-Climatological Summer Trends In The Continental United States, Naya Mairena Flores

REU Final Reports

We investigated trends in air temperature, stream temperature and discharge for rivers across the continental United States from the summer months of 1996 to 2016. Using GAGES II from USGS and PRISM and programming language R we analyzed specific hydrological trends in Mann-Kendall’s tests. After collecting the slope values whether they were negative or positive and the P-Values, the significance of that slope, we mapped slopes of trends in GIS. Stream temperature increased 12% of stations across the summer, while air temperature increased 22% of stations, and discharge decreased 15% of stations, respectively. Seven day moving average of daily maximum …

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Deciphering The Rules Of Cell-To-Cell Coupling By Molecular Modeling And Simulation, Linda D. Lee Jan 2018

Deciphering The Rules Of Cell-To-Cell Coupling By Molecular Modeling And Simulation, Linda D. Lee

REU Final Reports

Intercellular communication is vital for quick adjustments and maintenance for cell function and development. Gap junctions are membranes channel proteins that enable this direct communication between adjacent cells throughout the body. The compatibility of connexins (Cx), which make up a gap junction, determines whether a gap junction can form. Though many studies show which connexins are compatible, the molecular basis is not known (Bai & Wang, 2014). Through computational modeling, we identify the residues that energetically contribute most favorably at the docking interface of homotypic and heterotypic combinations of Cx43, Cx46, and Cx50 gap junctions. However, due to instability of …

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Variables Governing The Initial Stages Of The Synergisms Of Ultrasonic Treatment Of Biochar In Water Saturated With Carbon Dioxide, Adedapo Reuben Adeniyi Jan 2018

Variables Governing The Initial Stages Of The Synergisms Of Ultrasonic Treatment Of Biochar In Water Saturated With Carbon Dioxide, Adedapo Reuben Adeniyi

Electronic Theses and Dissertations

This work investigates the initial stage of the synergistic processes of acoustic treatment of biochar in water saturated with CO2 (AIChE Journal, 2014;60:1054-1065). Treatments with switchgrass and miscanthus biochars have been conducted to examine the effects of acoustic intensity, biochar/H2O ratio, CO2 concentrations of the solution, and that in the headspace above the solution. The changes in biochars’ heating values, carbon and hydrogen contents, internal surface area, and pore size distribution have significant technological implications and are the focal points of this study. The miscanthus and switchgrass biochars were produced via pyrolysis process at 700 oC and 550 oC, respectively. …

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Multilabel Learning For The Online Transient Stability Assessment Of Electric Power Systems, Peyman Beyranvand, Veysel Murat İstemi̇han Genç, Zehra Çataltepe Jan 2018

Multilabel Learning For The Online Transient Stability Assessment Of Electric Power Systems, Peyman Beyranvand, Veysel Murat İstemi̇han Genç, Zehra Çataltepe

Turkish Journal of Electrical Engineering and Computer Sciences

Dynamic security assessment of a large power system operating over a wide range of conditions requires an intensive computation for evaluating the system's transient stability against a large number of contingencies. In this study, we investigate the application of multilabel learning for improving training and prediction time, along with the prediction accuracy, of neural networks for online transient stability assessment of power systems. We introduce a new multilabel learning method, which uses a contingency clustering step to learn similar contingencies together in the same multilabel multilayer perceptron. Experimental results on two different power systems demonstrate improved accuracy, as well as …

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Novel Modified Impedance-Based Methods For Fault Location In The Presence Of A Fault Current Limiter, Javad Barati, Aref Doroudi Jan 2018

Novel Modified Impedance-Based Methods For Fault Location In The Presence Of A Fault Current Limiter, Javad Barati, Aref Doroudi

Turkish Journal of Electrical Engineering and Computer Sciences

A fault current limiter (FCL) is promising novel electric equipment to effectively reduce excessive short circuit current in power networks. The presence of a FCL at the time of a fault occurrence makes it necessary to consider new settings for protective relays and fault locators. This paper examines the presence of a FCL in power networks and its effects on single-ended impedance-based fault location methods. It will be shown that FCL deployment in a transmission line makes the traditional fault location method inefficient. Two modified methods are presented to solve the problem. The modified methods locate the fault point using …

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Engineering Retention: Improving Inclusion And Diversity In Engineering, Sidney Martin Jan 2018

Engineering Retention: Improving Inclusion And Diversity In Engineering, Sidney Martin

Murray State Theses and Dissertations

The researcher sought further understanding for strategies and pedagogies employed to serve the diverse learning and engagement needs of underrepresented minorities (URMs) enrolled in academic engineering programs. The researcher defined for this study underrepresented minorities as women, Hispanic Americans, and African Americans. There is a need for increased representation of URMs in both postsecondary education and the engineering profession. Underrepresented minorities are needed in the engineering profession to contribute to the complete solution and to provide improved ideas for consideration during the design process. The researcher discovered six factors utilized by engineering faculty and academic affairs in postsecondary education to …

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The Journal Of Undergraduate Research: 2018 Jan 2018

The Journal Of Undergraduate Research: 2018

The Journal of Undergraduate Research

This is the complete issue of the South Dakota State University Journal of Undergraduate Research , Volume 16.

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Phenomenological Study On Female Engineering Leaders In The New York Utility Industry, Shelanda Gonsalves Jan 2018

Phenomenological Study On Female Engineering Leaders In The New York Utility Industry, Shelanda Gonsalves

Walden Dissertations and Doctoral Studies

This qualitative phenomenological study explored the development of women with an engineering background who became leaders. The purpose of this study was to explore the lived experiences of female engineering leaders in the New York utility sector. The research problem was why few women with engineering degrees obtain leadership positions. Women comprise half the total working population, yet few hold leadership positions, especially in the utility sector. In this study, 28 women in the New York utility sector shared experiences on their progression from engineer to leadership. The conceptual framework was the Moustakas phenomenological approach, investigating the humanistic properties of …

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Bidirectionally Stretched Flow Of Jeffrey Liquid With Nanoparticles, Rosseland Radiation And Variable Thermal Conductivity, M. Archana, B. J. Gireesha, M. M. Rashidi, B. C. Prasannakumara, Rama S.R. Gorla Jan 2018

Bidirectionally Stretched Flow Of Jeffrey Liquid With Nanoparticles, Rosseland Radiation And Variable Thermal Conductivity, M. Archana, B. J. Gireesha, M. M. Rashidi, B. C. Prasannakumara, Rama S.R. Gorla

Mechanical Engineering Faculty Publications

Heat and mass transfer stretched flow of an incompressible, electrically conducting Jeffrey fluid has been studied numerically. Nanoparticles are suspended in the base fluid and it has many applications such as cooling of engines, thermal absorption systems, lubricants fuel cell, nanodrug delivery system and so on. Temperature dependent variable thermal conductivity with Rosseland approximation is taken into account and suction effect is employed in the boundary conditions. The governing partial differential equations are first transformed into set of ordinary differential equations using selected similarity transformations, which are then solved numerically using Runge-Kutta-Felhberg fourth-fifth order method along with shooting technique. The …

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Design Of Fusion-Based Underwater Image Enhancement Method In Video Stream, Pann Mya Hmue Jan 2018

Design Of Fusion-Based Underwater Image Enhancement Method In Video Stream, Pann Mya Hmue

Chulalongkorn University Theses and Dissertations (Chula ETD)

This thesis has designed a fusion-based enhancement method for underwater images and video streams which are mainly distorted by color changes, poor illumination, and water particles. The main objective of image fusion is to achieve a comprehensive result which is appropriate for the human visual system. In this thesis, our goal is to use a straight forward and not computationally intensive reconstruction. As a result, the underwater images or video streams are partially restored from the original ones. Firstly, the 5.8 GHz transmitter and receiver set are used to carry the input data from the camera which is placed inside …

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Assessment Of The Physical And Chemical Qualities Of Brine And The Application Of Nano Zerovalent Iron For The Treatment Of Brine Effluent, M. J. Alegbe, O. S. Ayanda, P. Ndungu, O. O. Fatoba, A. Nechaev, L. F. Petrik Jan 2018

Assessment Of The Physical And Chemical Qualities Of Brine And The Application Of Nano Zerovalent Iron For The Treatment Of Brine Effluent, M. J. Alegbe, O. S. Ayanda, P. Ndungu, O. O. Fatoba, A. Nechaev, L. F. Petrik

Mining Engineering Faculty Research & Creative Works

The arbitrary discharge of brine effluent from reverse osmosis treatment plants impacts negatively to the environment due to its high salinity. In the present study, brine effluent obtained from eMalahleni treatment plant, South Africa, was analyzed by pH, electrical conductivity and total dissolved solids measurements. The ion chromatography and the inductively coupled plasma optical emission spectroscopy were also used to examine the anion and cation content of the brine effluent. The analysis of major cations and anions indicated that the brine water quality was above the target water quality range for potable water. Geochemical modelling of the brine effluent classified …

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Simulating The Effects Of Co2 Gas Influx On The Thermodynamic Conditions Inside A Marine Riser Filled With Oil Based Mud, Hassan Al Dawood Jan 2018

Simulating The Effects Of Co2 Gas Influx On The Thermodynamic Conditions Inside A Marine Riser Filled With Oil Based Mud, Hassan Al Dawood

Honors Capstones

No abstract provided.

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Evaluation On Expansive Performance Of The Expansive Soil Using Electrical Responses, Ya Chu, Songyu Liu, Bate Bate, Lei Xu Jan 2018

Evaluation On Expansive Performance Of The Expansive Soil Using Electrical Responses, Ya Chu, Songyu Liu, Bate Bate, Lei Xu

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Light structures, such as highways and railroads, built on expansive soils are prone to damages from the swelling of their underlain soil layers. Considerable amount of research has been conducted to characterize the swelling properties of expansive soils. Current swell characterization models, however, are limited by lack of standardized tests. Electrical methods are non-destructive and are faster and less expensive than the traditional geotechnical methods. Therefore, geo-electrical methods are attractive for defining soil characteristics, including the swelling behavior. In this study, comprehensive laboratory experiments were undertaken to measure the free swelling and electrical resistivity of the mixtures of commercial kaolinite …

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Development Of Texture Weighted Fuzzy C-Means Algorithm For 3d Brain Mri Segmentation, Ji Young Lee Jan 2018

Development Of Texture Weighted Fuzzy C-Means Algorithm For 3d Brain Mri Segmentation, Ji Young Lee

Electronic Theses and Dissertations

The segmentation of human brain Magnetic Resonance Image is an essential component in the computer-aided medical image processing research. Brain is one of the fields that are attracted to Magnetic Resonance Image segmentation because of its importance to human. Many algorithms have been developed over decades for brain Magnetic Resonance Image segmentation for diagnosing diseases, such as tumors, Alzheimer, and Schizophrenia. Fuzzy C-Means algorithm is one of the practical algorithms for brain Magnetic Resonance Image segmentation. However, Intensity Non- Uniformity problem in brain Magnetic Resonance Image is still challenging to existing Fuzzy C-Means algorithm. In this paper, we propose the …

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Urea And Rgo Additives To Iodine/Triiodide Electrolyte For Higher Efficiency Dye-Sensitized Solar Cells, Salem Abdulkarim Jan 2018

Urea And Rgo Additives To Iodine/Triiodide Electrolyte For Higher Efficiency Dye-Sensitized Solar Cells, Salem Abdulkarim

Electronic Theses and Dissertations

This research investigated urea and reduced graphene oxide (rGO) as potential additives to a dye-sensitized solar cell (DSSC) iodide/triode electrolyte, in order to enhance overall electrical performance. Additive concentrations of 0, 2, 5, 10, and 15 wt% were investigated. In general, both additives were found to enhance DSSC electrical performance with respect to open circuit voltage Voc and DSSC fill factor FF. The greatest enhancement in these parameters occurred at an additive concentration of 10 wt%. Urea produced a greater degree of enhancement than rGO; the overall efficiency was increased by 10.17±0.01% for urea vs 9.57±0.01% for rGO. The specific …

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Simulation Of Non-Premixed Ethylene-Air Crossflow Jet Flame, Jennifer Onyinye Chikelu Jan 2018

Simulation Of Non-Premixed Ethylene-Air Crossflow Jet Flame, Jennifer Onyinye Chikelu

Electronic Theses and Dissertations

Computational fluid dynamics tool has been employed in the past to determine and analyze efficiency or performance in combustion engines and for combustion analysis. This paper represents a systematic investigation on the best model predicts the temperature and soot production in coflow jet flame, by applying various RANS turbulent model, soot models and radiation models in presence or absence of gravity. It also applies this model predicted in crossflow jet flame and investigates the velocity ratio (ratio of the velocity of fuel jet to the velocity of air stream) variation effect on temperature and soot production. ANSYS-Fluent CFD software tool …

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Development Of Vegetation Mapping With Deep Convolutional Neural Network, Sae-Han Suh Jan 2018

Development Of Vegetation Mapping With Deep Convolutional Neural Network, Sae-Han Suh

Electronic Theses and Dissertations

The Precision Agriculture plays a crucial part in the agricultural industry about improving the decision-making process. It aims to optimally allocate the resources to maintain the sustainable productivity of farmland and reduce the use of chemical compounds. [17] However, the on-site inspection of vegetations often falls to researchers’ trained eye and experience, when it deals with the identification of the non-crop vegetations. Deep Convolution Neural Network (CNN) can be deployed to mitigate the cost of manual classification. Although CNN outperforms the other traditional classifiers, such as Support Vector Machine, it is still in question whether CNN can be deployable in …

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Improving The Environmental Sustainability Of Pallet Logistics Through Preemptive Remanufacturing: An Integer Linear Optimization Model, Fabiana Tornese, Jennifer Pazour, Andres L. Carrano, Brian K. Thorn Jan 2018

Improving The Environmental Sustainability Of Pallet Logistics Through Preemptive Remanufacturing: An Integer Linear Optimization Model, Fabiana Tornese, Jennifer Pazour, Andres L. Carrano, Brian K. Thorn

15th IMHRC Proceedings (Savannah, Georgia. USA – 2018)

The use of pallets is crucial in handling and transportation processes and wooden pallet represent the most common packaging type in the US and in Europe. This work focuses on the environmental impact of wooden pallet reverse logistics, exploring the advantages of preemptive remanufacturing policies. Preemptive schedules allow the service provider to allocate transportation emissions across multiple pallet components, increasing the environmental efficiency of the transportation process. This advantage has to be compared to the lost opportunity of repairing a usable component earlier than required. An integer linear optimization model analyzes this trade-off and the benefits of a preemptive remanufacturing …

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Managing The Order Picking Process In For Click And Collect In Grocery Stores, Dale T. Masel, Akhilesh Mesa Jan 2018

Managing The Order Picking Process In For Click And Collect In Grocery Stores, Dale T. Masel, Akhilesh Mesa

15th IMHRC Proceedings (Savannah, Georgia. USA – 2018)

Many grocery stores offering a service called “Click and Collect,” where customers can submit an order online and pick up the order at the store or have it delivered. To offer this service in an efficient way while still meeting customer expectations, stores can adapt methods used in warehouse order picking. Once strategy is the method used to group the orders into batches as they are received. We have examined two strategies for batching: order-based batching and time-based batching. From testing these two approaches, time-based batching produces a slightly lower average picking time, but order-based batching has orders ready for …

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A Space Syntax Analysis Of The Relationship Between Function And Form In Facility Layout, Alejandro Teran-Somohano, Alice E. Smith Jan 2018

A Space Syntax Analysis Of The Relationship Between Function And Form In Facility Layout, Alejandro Teran-Somohano, Alice E. Smith

15th IMHRC Proceedings (Savannah, Georgia. USA – 2018)

This paper explores the relationship between a facility’s operation and its form using quantitative techniques provided by Space Syntax. Space Syntax provides quantitative metrics for characterizing the spatial traits of the locations within a facility which can then be related to operational metrics. Instances of the quadratic assignment problem are used to perform spatial and operational analyses on different flow matrices to study the resulting layouts. The effects of different objective functions on facility shapes are also studied.

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An Integrated Network Modeling Framework For Analysis Of Multi-Line Order Pick Systems, Debjit Roy, Vishal Bansal Jan 2018

An Integrated Network Modeling Framework For Analysis Of Multi-Line Order Pick Systems, Debjit Roy, Vishal Bansal

15th IMHRC Proceedings (Savannah, Georgia. USA – 2018)

Due to demanding service levels in E-commerce order fulfillment, modeling and analysis of order picking processes in warehouses deserve special attention. With a particular focus on multi-line E-commerce orders, we develop modeling tools that are necessary to analyze the order consolidation delays in the downstream pick stations. We develop a queuing network modeling framework for integrated analysis of upstream (storage system) and downstream (pick system). We apply our modeling approach to an integrated order-pick system that includes a shuttle-based storage and retrieval system, and a single pick station. Using simulations, we test the effect of the storage system configuration on …

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Scalable Heuristic For Locating Distribution Centers On Real Road Networks, Saeed Ghanbartehrani, Jose David Porter Jan 2018

Scalable Heuristic For Locating Distribution Centers On Real Road Networks, Saeed Ghanbartehrani, Jose David Porter

15th IMHRC Proceedings (Savannah, Georgia. USA – 2018)

The median problem is a type of network location problem that aims at finding a node with the total minimum demand weighted distance to a set of demand points in a weighted graph. In this research, an algorithm for solving the median problem on real road networks is proposed. The proposed algorithm, referred to as the Multi-Threaded Dijkstra’s (MTD) algorithm, is used to locate Walmart distribution centers on the 28-million node road network of the United States with the objective of minimizing the total demand weighted transportation cost. The resulting optimal location configuration of Walmart distribution centers improves the total …

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Integrated Intermodal Network Design With Nonlinear Inter-Hub Movement Costs, Mohammad Ghane-Ezabadi, Hector A. Vergara Jan 2018

Integrated Intermodal Network Design With Nonlinear Inter-Hub Movement Costs, Mohammad Ghane-Ezabadi, Hector A. Vergara

15th IMHRC Proceedings (Savannah, Georgia. USA – 2018)

In this research, transportation mode and load route selection problems are integrated with the hub location problem in a single mathematical formulation to find the optimal design of intermodal transportation networks. Economies of scale are modeled utilizing a stepwise function that relates the per container transportation cost to the amount of flow between two nodes. A heuristic method combining a genetic algorithm and the shortest path algorithm was developed to solve this integrated planning problem. Computational experiments were completed to evaluate the performance of the proposed heuristic for different problem instances. At the end, conclusions are presented and future research …

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Shuttle-Based Storage And Retrieval Systems With Robotic Order-Picking Shuttle Carrier, Tone Lerher Jan 2018

Shuttle-Based Storage And Retrieval Systems With Robotic Order-Picking Shuttle Carrier, Tone Lerher

15th IMHRC Proceedings (Savannah, Georgia. USA – 2018)

Shuttle-based storage and retrieval systems with robotic order picking shuttle carrier are relatively new systems not yet address in automated storage system research. The objective of this research paper is to propose analytical model for robotic order picking shuttle carriers. Analytical expressions for the calculation of multi cycle have been determined by assuming uniform distributed order-picking locations and the probability theory. The proposed model enables the calculation of the expected travel (cycle) time for multiple command cycles of the robotic order picking shuttle carrier, from which the throughput performance can be evaluated.

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Batching In Bucket Brigade Order Picking, Yossi Bukchin, Eran Hanany, Eugene Khmelnitsky Jan 2018

Batching In Bucket Brigade Order Picking, Yossi Bukchin, Eran Hanany, Eugene Khmelnitsky

15th IMHRC Proceedings (Savannah, Georgia. USA – 2018)

Order picking is the most labor cost consuming element in warehouse operations. In this paper, we consider an order picking process in a single picking aisle in the forward pick area, consisting of multiple locations (pick faces). The picking is performed by a group of pickers, each characterized by stochastic (forward and backward) walking process and picking times. We assume that the bucket brigade (BB) approach is applied, in a static environment, in which a given set of orders has to be picked. In order to improve the picking process, we suggest a batching procedure, where the objective is to …

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Deployment Of An Distributed Strategic Material Flow Control For Automated Material Flow Systems Consisting Of Autonomous Modules, Christian Lieberoth-Leden, Johannes Fottner Jan 2018

Deployment Of An Distributed Strategic Material Flow Control For Automated Material Flow Systems Consisting Of Autonomous Modules, Christian Lieberoth-Leden, Johannes Fottner

15th IMHRC Proceedings (Savannah, Georgia. USA – 2018)

The modularisation of hardware and software is one approach to handle the demand for increasing flexibility and changeability of automated material flow systems that are, for example, utilised in flexible production systems. In such automated material flow systems, autonomous modules communicate with each other to coordinate and execute transport tasks. In this paper a strategic material flow control is introduced, which is distributed on several modules realised with a multi-agent system. The strategic material flow control agent coordinates transport tasks with advanced logistical requirements, such as sequencing. A transport task states for a transport unit the system source and sink …

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A Practical Collaborative Material Handling Strategy For Cross-Docks, Hector J. Carlo, Stephanie Santiago-Montano Jan 2018

A Practical Collaborative Material Handling Strategy For Cross-Docks, Hector J. Carlo, Stephanie Santiago-Montano

15th IMHRC Proceedings (Savannah, Georgia. USA – 2018)

The current operational paradigm at less-than- truckload (LTL) cross-dock industry (i.e., dedicated strategy) is to assign one material handler (MH) per inbound trailer. As a consequence, each loaded trip performed by a MH to move a load from the assigned inbound door to the loads’ corresponding outbound door is followed by an identical empty trip to return to the inbound door. This paper introduces the monomaniacal strategy as a practical rule-based material handling collaborative strategy for LTLs designed to minimize the total empty travel. In the monomaniacal strategy, after delivering a load to an outbound door, MHs travel counterclockwise to …

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A Measurement Tool For Circular Economy Practices: A Case Study In Pallet Supply Chains, Maria Grazia Gnoni, Fabiana Tornese, Brian K. Thorn, Andres L. Carrano, Jennifer A. Pazour Jan 2018

A Measurement Tool For Circular Economy Practices: A Case Study In Pallet Supply Chains, Maria Grazia Gnoni, Fabiana Tornese, Brian K. Thorn, Andres L. Carrano, Jennifer A. Pazour

15th IMHRC Proceedings (Savannah, Georgia. USA – 2018)

A circular economy (CE) is an economic system where products and services are traded in closed loops or ‘cycles’. This work develops a framework for assessing the extent to which product supply chains incorporate circular economy principles, and applies this framework to a specific material handling application, the wooden pallet supply chain. The main decisions affecting circularity and the most common decision alternatives for the wooden pallet supply chain are identified for the Pre-manufacturing, manufacturing, product delivery, customer use, and end-of-life phases. A streamlined life cycle assessment tool is developed for supporting a quick analysis about how the level of …

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