Period Batch Control - A Production Planning System Applied To Virtual Manufacturing Cells,
2016
Old Dominion University
Period Batch Control - A Production Planning System Applied To Virtual Manufacturing Cells, Z. Tesic, B. Stevanaov, V. Jovanovic, M. Tomic, C. Kafol
Engineering Technology Faculty Publications
Period Batch Control (PBC) system has been known for its implementation with the classical group technology (GT) cells, and it has been known for its simplicity. The main production planning decisions concern the choice of the period length and the stage number and contents. Also, in order to better integrate the production planning with the application of GT cells at the shop floor, the concept of virtual manufacturing cells has been applied. Since virtual cells configurations are changing periodically, a model for implementing the PBC system into virtual manufacturing cells environment is developed. The model enables alignment of the PBC …
Pilot Programs For Veterans Transition To Engineering Fields,
2016
Old Dominion University
Pilot Programs For Veterans Transition To Engineering Fields, Vukica M. Jovanovic, Anthony W. Dean, Carol L. Considine, Karina Arcaute, Petros Katsioloudis, Mileta Tomovic, Thomas B. Stout, Connor Schwalm, Jennifer G. Michaeli, Yuzhong Shen
Engineering Technology Faculty Publications
Veterans, through their active service, frequently receive training in highly skilled technical areas. However, they may lack a theoretical background in underlying engineering principles. They also need additional support with the transition from a highly structured military environment to an environment with more ambiguous time constraints and different sorts of responsibilities. Moreover they are facing challenges which are specific for their student population. Therefore, enabling multiple mechanisms which would support them and provide them necessary guidance are especially important at universities with large veteran populations such as at Old Dominion University in Norfolk, Virginia. Hence, there is a need for …
Kinematic Modeling Of An Automated Laser Line Scanning System,
2016
Wayne State University
Kinematic Modeling Of An Automated Laser Line Scanning System, Kiran Sunil Deshmukh
Wayne State University Theses
This research work describes the geometric coordinate transformation in an automated laser line scanning system caused by movements required for scanning a component surface. The elements of an automated laser scanning system (robot, laser line scanner, and the component coordinate system) function as a mechanical linkage to obtain a trajectory on a component surface. This methodology solves the forward kinematics, derives the component surface, and uses inverse kinematic equations to characterize the movement of the entire automated scanning system on point trajectory. To reach a point on the component, joint angles of robot have been calculated. As a result, trajectory …
การลดของเสียในกระบวนการผลิตอุปกรณ์ส่งและรับสัญญาณ,
2016
คณะวิศวกรรมศาสตร์
การลดของเสียในกระบวนการผลิตอุปกรณ์ส่งและรับสัญญาณ, กนกวรรณ บุญฤทธิ์ศักดิ์
Chulalongkorn University Theses and Dissertations (Chula ETD)
งานวิจัยนี้มีวัตถุประสงค์เพื่อลดปริมาณของเสียอุปกรณ์ส่งและรับสัญญาณทางแสงที่เกิดจากค่าแรงเฉือนของการยึดติดระหว่างชิ้นส่วนเลนส์บนแผ่นประกอบวงจรไฟฟ้าชนิดยืดหยุ่น (FPCBA: Flexible Printed Circuit Board Assembly) ซึ่งมีกระบวนการผลิตเริ่มจาก (1) นำแผ่นประกอบวงจรไฟฟ้าชนิดยืดหยุ่น (FPCBA) ที่ผ่านการประกอบวงจรอิเล็กทรอนิกส์แล้วมาทำความสะอาด (2) หยอดกาวชนิด Urethane Acrylate (UA) จำนวน 8 ตำแหน่งบนแผ่น FPCBA (3) ยิงและอบด้วยแสงยูวี (4) หยอดกาวชนิดEpoxyสีดำ (5) อบด้วยความร้อน ดำเนินการวิเคราะห์หาสาเหตุโดย (1) ศึกษาความสัมพันธ์ระหว่างค่าแรงเฉือนที่ได้กับจำนวนการเกิดสีขาวขุ่นของกาวUA บนแผ่น FPCBA (2) ตรวจสอบลักษณะข้อบกพร่องของการยึดติดกาวด้วยกล้องจุลทรรศน์เล็กตรอนแบบส่องกราด (3) วิเคราะห์องค์ประกอบของชนิดคราบกาวและตรวจหาหมู่ฟังก์ชันด้วยเครื่อง FTIR (Fourier Transform Infrared Spectrometer) (4) วิเคราะห์หาขั้นตอนที่ทำให้เกิดของเสีย โดยพิจารณาจากขั้นตอนท้ายไปหน้า (5) ดำเนินการปรับปรุง ผลการศึกษาพบว่า 1) ค่าแรงเฉือนมีค่าลดลงเมื่อมีจำนวนตำแหน่งของกาวUA เปลี่ยนสีจากใสเป็นขาวขุ่นมากขึ้น 2) ลักษณะของเสียกาวUAขาวขุ่นเกิดขึ้นที่ขั้นตอนการทำความสะอาด โดยวิธีทำความสะอาดของพนักงานมีอิทธิพลมากที่สุด ซึ่งลักษณะของเสียกาวUA ขาวขุ่นเกิดจากกาวUA ที่ไม่ยึดติดบน FPCBA ซึ่งเกิดจากการทำความสะอาดที่ไม่เพียงพอ 3) ระยะทางในการทำความสะอาดต่อก้านสำลีและการทำซ้ำที่ใช้เช็ดทำความสะอาด ส่งผลต่อการเกิดกาวUAขาวขุ่น 4) การใช้สารระเหยทำความสะอาดชิ้นงานชนิด IPA (Isopropyl Alcohol) ที่มีจุดเดือด 82.6°C ซึ่งใกล้เคียงกับอุณหภูมิที่ใช้ในขั้นตอนการอบชิ้นงานเท่ากับ90±5°C ซึ่งเป็นขั้นตอนสุดท้าย เป็นสาเหตุให้กาวUA เปลี่ยนสีจากใสเป็นขาวขุ่น เนื่องจากไอระเหยที่ไล่ออกไม่หมด 5) การใช้สารระเหยชนิดเมธนอล (Methanol) ที่มีจุดเดือด 64.7°C ทดแทน IPA พบว่าของเสียจากกาวUA ขาวขุ่นลดลงจากเดิมก่อนศึกษา 33% เป็น 7% และไม่เกิดกาวขาวขุ่นอีกเลย ตามลำดับ
Using Case-Based Reasoning For Simulation Modeling In Healthcare,
2016
University of Central Florida
Using Case-Based Reasoning For Simulation Modeling In Healthcare, Khaled Alshareef
Electronic Theses and Dissertations
The healthcare system is always defined as a complex system. At its core, it is a system composed of people and processes and requires performance of different tasks and duties. This complexity means that the healthcare system has many stakeholders with different interests, resulting in the emergence of many problems such as increasing healthcare costs, limited resources and low utilization, limited facilities and workforce, and poor quality of services. The use of simulation techniques to aid in solving healthcare problems is not new, but it has increased in recent years. This application faces many challenges, including a lack of real …
A Holistic Framework For Effective Engineering Leadership Development Using 3d Virtual World Simulation,
2016
University of Central Florida
A Holistic Framework For Effective Engineering Leadership Development Using 3d Virtual World Simulation, Hamed Almalki
Electronic Theses and Dissertations
Problems associated with the limited success of traditional engineering leadership development are the absence of embedded real-life industry case studies in leadership development and incorrect applications of leadership strategies in the various contexts. Though recommended programs for enhancing leadership development exist, they lack an examined framework, especially when it comes to leadership development of undergraduate engineering students. In this research effort, the impact of a framework using 3D virtual world simulation and the 4-D Leadership System to enhance the leadership abilities of undergraduate engineering students at the individual and team levels based on industrial leadership case studies was investigated. The …
A Predictive Model To Identify Caregivers At Risk Of Musculoskeletal Disorders,
2016
University of Central Florida
A Predictive Model To Identify Caregivers At Risk Of Musculoskeletal Disorders, Abdulelah Ali
Electronic Theses and Dissertations
Healthcare systems face several challenges due to the aging workforce, recruitment shortages, increasing patient acuteness, and increasing patient size and weight. The most costly, leading, and prevalent problem in the healthcare industry and nursing professions is work-related Musculoskeletal Disorders (MSDs). MSDs are common among caregivers because of the nature of their work, which requires repetitive heavy physical activity. The development of MSDs among caregivers negatively impacts the quality of care, and incurs high costs such as worker compensation, days away from work, turnover, rehabilitation, and lower productivity. Therefore, it is essential to determine the factors that contribute to musculoskeletal disorder …
The Effect Of Baldrige Performance Excellence Program On Organization's Innovation/Dynamic Capabilities,
2016
University of Central Florida
The Effect Of Baldrige Performance Excellence Program On Organization's Innovation/Dynamic Capabilities, Mohammed Alomairy
Electronic Theses and Dissertations
This dissertation investigated the effect of Baldrige performance excellence program on organization's innovation/dynamic capabilities improvement. According to the literature, there is little or no practical method for building dynamic/innovation capabilities within organizations. The study hypothesizes that Baldrige performance excellence program helps organizations to systematically develop the required dynamic/innovation capabilities for innovation. Twenty-four organizations that had implemented Baldrige program over the past five years participated in this research study. Two types of data were measured/collected from these organizations; Performance excellence data and Innovation capabilities data. To avoid bias in the data collection, the two data were measured and collected at different …
A New Six Sigma Implementation Approach For Power Generation Gas Turbines Repair Process Development,
2016
University of Central Florida
A New Six Sigma Implementation Approach For Power Generation Gas Turbines Repair Process Development, Somesh Ghunakikar
Electronic Theses and Dissertations
Power Generation gas turbines used for heavy duty application mainly constitutes three modules; compressor, combustion and turbine. Typically, all these parts are designed by OEM companies for specific number of hours and cycles (also known as starts) before they become dysfunctional. In addition, Gas Turbine (GT) also have intended repair interval depending upon the type of part application and anticipated damages during service operation. Thus, GT parts need inspections and repair (overhaul) after certain operating hours in order to recondition them so that they can be fit for reoperation to produce power. In this dissertation, a unique six sigma DFSS …
Modeling And Solving Large-Scale Stochastic Mixed-Integer Problems In Transportation And Power Systems,
2016
University of Central Florida
Modeling And Solving Large-Scale Stochastic Mixed-Integer Problems In Transportation And Power Systems, Zhouchun Huang
Electronic Theses and Dissertations
In this dissertation, various optimization problems from the area of transportation and power systems will be respectively investigated and the uncertainty will be considered in each problem. Specifically, a long-term problem of electricity infrastructure investment is studied to address the planning for capacity expansion in electrical power systems with the integration of short-term operations. The future investment costs and real-time customer demands cannot be perfectly forecasted and thus are considered to be random. Another maintenance scheduling problem is studied for power systems, particularly for natural gas fueled power plants, taking into account gas contracting and the opportunity of purchasing and …
Assessing The Effect Of Social Networks On Employee Creativity In A Fast-Food Restaurant Environment,
2016
University of Central Florida
Assessing The Effect Of Social Networks On Employee Creativity In A Fast-Food Restaurant Environment, Mitchell Rabinowitz
Electronic Theses and Dissertations
Creativity has been widely recognized as critical to the economic success of organizations for over 60 years. Today, it is considered to be the most highly prized "commodity" of businesses. As such, there have been numerous efforts to better understand creativity with the goal of increasing individual creativity and therefore improving the economic success of organizations. An emerging area of research on creativity recognizes creativity as a complex, social process that is dependent upon many factors, including those of an environmental nature. In support of this perspective, a growing amount of research has investigated the effect of social networks on …
Data Mining Models For Tackling High Dimensional Datasets And Outliers,
2016
University of Central Florida
Data Mining Models For Tackling High Dimensional Datasets And Outliers, Orestis Panos Panagopoulos
Electronic Theses and Dissertations
High dimensional data and the presence of outliers in data each pose a serious challenge in supervised learning. Datasets with significantly larger number of features compared to samples arise in various areas, including business analytics and biomedical applications. Such datasets pose a serious challenge to standard statistical methods and render many existing classification techniques impractical. The generalization ability of many classification algorithms is compromised due to the so-called curse of dimensionality. A new binary classification method called constrained subspace classifier (CSC) is proposed for such high dimensional datasets. CSC improves on an earlier proposed classification method called local subspace classifier …
Parametric Investigations Into Internal Surface Modification Of Brass Tubes With Alternating Magnetic Field,
2016
The University of Texas Rio Grande Valley
Parametric Investigations Into Internal Surface Modification Of Brass Tubes With Alternating Magnetic Field, Harish Kumar, Sehijpal Singh, Anil K. Srivastava
Manufacturing & Industrial Engineering Faculty Publications
The final finish operations have great significance in an overall manufacturing cycle of a product. The surface finishing and modification of surfaces have been the vital requirements of most of the products. The processes like shot peening, shot blasting, abrasive finishing and super finishing are being largely employed for such requirements. While final finishing of flat and outside surfaces are relatively easy and well established, the internal surfaces such as those of pipes is not so simple. In this paper, the application of low frequency alternative magnetic field has been explored for imparting surface modification including surface on the internal …
Assessing Safety Culture Among Personnel In Governmental Construction Sites At Saudi Arabia: A Quantitative Study Approach,
2016
University of Central Florida
Assessing Safety Culture Among Personnel In Governmental Construction Sites At Saudi Arabia: A Quantitative Study Approach, Omar Alrehaili
Electronic Theses and Dissertations
Safety is an essential issue for organizations to survive, especially for hazardous industries such as the construction industry. The construction industry is considered to be one of the major industries that help in the growth of the economy and the infrastructure of all countries. Recently, scholars have paid increasing attention to the concept of safety culture due to its role in decreasing the occurrences of accidents and injuries. Safety culture has become the focus of all industries and has received much attention in recent years, especially within the construction industry. Absence of this culture is a major cause of injuries …
การปรับปรุงกระบวนการออกแบบชุดสายไฟในรถยนต์,
2016
คณะวิศวกรรมศาสตร์
การปรับปรุงกระบวนการออกแบบชุดสายไฟในรถยนต์, ทิวารัตน์ สวัสดี
Chulalongkorn University Theses and Dissertations (Chula ETD)
งานวิจัยฉบับนี้ ทำการศึกษาเกี่ยวกับบริษัท ออกแบบสายไฟในรถยนต์ที่ให้ความสำคัญในเรื่องความพึงพอใจของลูกค้า ซึ่งเป็นหนึ่งในปัจจัยที่สำคัญที่สุดในการออกแบบผลิตภัณฑ์ ด้วยเหตุนี้บริษัท จึงใช้วิธีการทั้งหมดในการออกแบบกระบวนการออกแบบผลิตภัณฑ์ตามความต้องการที่หลากหลายของลูกค้า จึงทำให้มีการเปลี่ยนแปลงการออกแบบเป็นจำนวนมาก งานวิจัยนี้มีวัตถุประสงค์เพื่อปรับปรุงกระบวนการออกแบบชุดสายไฟในรถยนต์ที่มีผลต่อกำหนดการผลิตโดยใช้การวิเคราะห์ Fault Tree และ Failure Mode and Effect Analysis (FMEA) เป็นเครื่องมือหลัก FTA ใช้สำหรับการวิเคราะห์สาเหตุหลักและใช้ FMEA เพื่อจัดลำดับความสำคัญสูง (RPN) ซึ่งแสดงให้เห็นถึงความสำคัญของปัจจัยต่างๆในชุดสายไฟในรถยนต์ที่มีผลกระทบสูงต่อการออกแบบชุดสายไฟในรถยนต์ และหลังจากมีการปรับปรุงกระบวนการออกแบบและควบคุมปัจจัยที่ส่งผลเสียต่อกระบวนการออกแบบจะพบการขอเปลี่ยนแปลงการออกแบบที่ลดลงจาก 0.26 ครั้ง ต่อการออกแบบ 1 ครั้ง เป็น 0.06 ครั้ง ต่อการออกแบบ 1 ครั้ง แสดงถึงกระบวนการออกแบบที่ถูกปรับปรุงให้สามารถสร้างความพึงพอใจแก่ลูกค้าที่มีต่อผลิตภัณฑ์มากขึ้น
Applications Of Digital Manufacturing In Manufacturing Process Support,
2016
Old Dominion University
Applications Of Digital Manufacturing In Manufacturing Process Support, Vukica Jovanovic, Mihael Debevec, Niko Herakovic, Alok Verma, Mileta Tomovic
Engineering Technology Faculty Publications
In this study, the authors developed three new approaches and models for improvements related to manufacturing processes. The main focus was on planning in a digital environment before the actual manufacturing process is carried out. The first approach is digital manufacturing, which gives affords the opportunity for performing an entire manufacturing process in a virtual environment. In this way, engineers virtually define, plan, create, monitor, and control all production processes. The planning phase can be done simultaneously, while other manufacturing processes are already in place. In this way, processes can continue with no interruption. Various product lifecycle management tools have …
The Reconfigurable Machinery Efficient Workspace Analysis Based On The Twist Angles,
2016
Old Dominion University
The Reconfigurable Machinery Efficient Workspace Analysis Based On The Twist Angles, Ana M. Djuric, Vukica Jovanovic, Mirjana Filipovic, Ljubinko Kevac
Engineering Technology Faculty Publications
A novel methodology for the calculation, visualisation and analysis of the Reconfigurable Machinery Efficient Workspace (RMEW), based on the twist angles, is presented in this paper. The machinery's kinematic parameters are used for calculating the workspace, while the efficient workspace is associated with the machinery's path and includes the end-effector position and orientation. To analyse and visualise many different machinery efficient workspaces at the same time, the calculation is based on the previously developed and validated complex reconfigurable machinery's kinematic structure named n-DOF Global Kinematic Model (n-GKM). An industrial robot is used as an example to demonstrate …
Toward An Engineering Discipline Of Warehouse Design,
2016
Stewart School of Industrial and Systems Engineering
Toward An Engineering Discipline Of Warehouse Design, Leon Mcginnis, Timothy Sprock
14th IMHRC Proceedings (Karlsruhe, Germany – 2016)
Warehouses today are complex dynamic engineered systems, incorporating automation, mechanization, equipment, fixtures, computers, networks, products and people, and they can support the flow of tens or hundreds of thousands of different items to enable fulfilling thousands or tens of thousands of orders daily. In that sense, they represent a design challenge that is not terribly different from the design of other complex dynamic engineered systems, such as a modern passenger airplane, an automobile, or a unique building. What is different is that the design of these other complex dynamic engineered systems typically follows some engineering design discipline. Here, we argue …
Monte Carlo Algorithm To Study Performance Parameters Of Shuttle Systems,
2016
Graz University of Technology
Monte Carlo Algorithm To Study Performance Parameters Of Shuttle Systems, Wolfgang Trummer, Dirk Jodin
14th IMHRC Proceedings (Karlsruhe, Germany – 2016)
Shuttle systems provide alternative solutions in storage technology. Ma-terial flow analyses of these systems are extensive due to complex interac-tion of several shuttles and lift elements. Besides classic cycle time calcu-lation, it also requires advanced analyzing methods. At the Institute of Logistics Engineering (ITL), Graz University of Technology, an innovative, software-based approach has been developed to investigate the performance of shuttle systems. This approach is based on the Monte Carlo method. The software tool takes into account a variety of different systems and operating parameters to reflect operative behavior of shuttle systems.
Enhancing Surface Finish Of Fused Deposition Modeling Parts Through Targeted Chemicals And Design Of Experiments,
2016
University of Texas at El Paso
Enhancing Surface Finish Of Fused Deposition Modeling Parts Through Targeted Chemicals And Design Of Experiments, Saurabh Nayyar Nayyar
Open Access Theses & Dissertations
Fused Deposition Modeling (FDM) is one of the most popular rapid prototyping (RP) technologies due to its low operational cost, high fabrication speed, and range of applications served. However, FDM fabricated parts generally have poor surface finish quality which have limited their utilization in end-use applications. To enhance surface quality of FDM materials, several researchers have regulated key process parameters using the FDM material, Acrylonitrile Butadiene Styrene (ABS), with varying results. The main goal of this research is to investigate the effects of a post-fabrication chemical treatment process on the surface roughness for FDM parts of the FDM material ULTEM. …
