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A Methodology For Data-Driven Decision-Making In Last Mile Delivery Operations, Edgar Gutierrez Franco
A Methodology For Data-Driven Decision-Making In Last Mile Delivery Operations, Edgar Gutierrez Franco
Electronic Theses and Dissertations
Across all industries, from manufacturing to services, decision-makers must deal day to day with the outcomes from past and current decisions that affect their business. Last-mile delivery is the term used in supply chain management to describe the movement of goods from a hub to final destinations. This research proposes a methodology that supports decision making for the execution of last-mile delivery operations in a supply chain. This methodology offers diverse, hybrid, and complementary techniques (e.g., optimization, simulation, machine learning, and geographic information systems) to understand last-mile delivery operations through data-driven decision-making. The hybrid modeling might create better warning systems …
The Challenges And Barriers To Employment For Female In Riyadh And Tabuk, Sultan Almutairi
The Challenges And Barriers To Employment For Female In Riyadh And Tabuk, Sultan Almutairi
Electronic Theses and Dissertations
Women labor force participation plays an important role in economic. The developing in economy in Saudi Arabia depends on men rather than women, more than 50 years the Saudi women participation in the labor force extremely is low, this dissertation seeks to identify the challenges and barriers to employment for women in Riyadh and Tabuk. This study examines three research questions. The first question explored the difference between the rate of women unemployment in Tabuk and the rate of women unemployment in Riyadh. The second question investigated ways in which a logistic regression using demographics data could be used to …
The Challenges And Barriers Facing Successful Lean Implementation In The Qatari Manufacturing Organizations, Abdulwahab Alyousef
The Challenges And Barriers Facing Successful Lean Implementation In The Qatari Manufacturing Organizations, Abdulwahab Alyousef
Electronic Theses and Dissertations
The success of Toyota, the inventor of Lean Systems has drawn the attention of academics, researchers, and executives in the last decades. However, existing lean research is largely focused on developed economies in Europe, the Americas, and in Southeast Asia with little focus on the Arab world in general and Qatar specifically. There has been an emergence of manufacturing organizations and Small and Medium- sized Enterprises (SME) in Qatar recently which was the focus of this research. Despite the many attempts to implement lean in organizations, there have been a large number of failed attempts. This research aims to study …
Factors Affecting Systems Engineering Rigor In Launch Vehicle Organizations, Denton Gibson
Factors Affecting Systems Engineering Rigor In Launch Vehicle Organizations, Denton Gibson
Electronic Theses and Dissertations
Systems engineering is a methodical multi-disciplinary approach to design, build, and operate complex systems. Launch vehicles are considered by many extremely complex systems that have greatly impacted where the systems engineering industry is today. Launch vehicles are used to transport payloads from the ground to a location in space. Satellites launched by launch vehicles can range from commercial communications to national security payloads. Satellite costs can range from a few million dollars to billions of dollars. Prior research suggests that lack of systems engineering rigor as one of the leading contributors to launch vehicle failures. A launch vehicle failure could …
An Agent Based Model To Assess Crew Temporal Variability During U.S. Navy Shipboard Operations, Kevin Muhs
An Agent Based Model To Assess Crew Temporal Variability During U.S. Navy Shipboard Operations, Kevin Muhs
Electronic Theses and Dissertations
Understanding the factors that affect human performance variability as well as their temporal impacts is an essential element in fully integrating and designing complex, adaptive environments. This understanding is particularly necessary for high stakes, time-critical routines such as those performed during nuclear reactor, air traffic control, and military operations. Over the last three decades significant efforts have emerged to demonstrate and apply a host of techniques to include Discrete Event Simulation, Bayesian Belief Networks, Neural Networks, and a multitude of existing software applications to provide relevant assessments of human task performance and temporal variability. The objective of this research was …
The Relationship Between Agile Project Management And Project Success Outcomes, Thomas Bergmann
The Relationship Between Agile Project Management And Project Success Outcomes, Thomas Bergmann
Electronic Theses and Dissertations
Agile project management (APM) has recently emerged as a new approach to managing complex projects. Some experts believe that APM will become the standard project management approach used in the 21st century. However, thus far, the role of agility in project management has not been widely investigated. In the recent past, the concept of agility has mainly been applied to software development projects. The literature on agility is still in its early stages, and further research needs to be conducted in new project management domains. This study is intended to determine the impact of the adoption of APM on project …
Fast Compressed Automatic Target Recognition For A Compressive Infrared Imager, Brian Millikan
Fast Compressed Automatic Target Recognition For A Compressive Infrared Imager, Brian Millikan
Electronic Theses and Dissertations
Many military systems utilize infrared sensors which allow an operator to see targets at night. Several of these are either mid-wave or long-wave high resolution infrared sensors, which are expensive to manufacture. But compressive sensing, which has primarily been demonstrated in medical applications, can be used to minimize the number of measurements needed to represent a high-resolution image. Using these techniques, a relatively low cost mid-wave infrared sensor can be realized which has a high effective resolution. In traditional military infrared sensing applications, like targeting systems, automatic targeting recognition algorithms are employed to locate and identify targets of interest to …
Explore Contributing Geometric Factors And Built-Environment On Bicycle Activity And Safety At Intersections, Scott Castro
Explore Contributing Geometric Factors And Built-Environment On Bicycle Activity And Safety At Intersections, Scott Castro
Electronic Theses and Dissertations
This study attempts to explore all factors associated with bicycle motor-vehicle crashes at intersections in order to improve bicycle safety and bicycle activity. Factors such as exposure (bicycle and vehicle volumes), existing facilities (bike lanes, sidewalks, shared-use paths), geometric design (# of lanes, speed limit, medians, legs, roadway conditions), and land-use were collected and evaluated using Poisson, Zero-Inflated Poisson, and Negative Binomial models in SAS 9.4 software. Increasing the bicycle travel mode can have positive lasting effects on personal health, the environment, and improve traffic conditions. Deterrents that keep users from riding bicycles more are the lack of facilities and …
A Framework For Prioritizing Opportunities Of Improvement In The Context Of Business Excellence Model In Healthcare Organization, Alia Aldarmaki
A Framework For Prioritizing Opportunities Of Improvement In The Context Of Business Excellence Model In Healthcare Organization, Alia Aldarmaki
Electronic Theses and Dissertations
In today's world, the healthcare sector is facing challenges to improve the efficiency and effectiveness of its operations. More and more improvement projects are being adopted to enhance healthcare services, making it more patient-centric, and enabling better cost control. Healthcare organizations strive to identify and carry out such improvement initiatives to sustain their businesses and gain competitive advantage. Seeking to reach a higher operational level of excellence, healthcare organizations utilize business excellence criteria to conduct assessment and identify organizational strengths and weaknesses. However, while such assessments routinely identify numerous areas for potential improvement, it is not feasible to conduct all …
A Framework For Lean Transformation In Developing Countries: The Case Of Saudi Arabian Industry, Murad Andejany
A Framework For Lean Transformation In Developing Countries: The Case Of Saudi Arabian Industry, Murad Andejany
Electronic Theses and Dissertations
Lean is a dynamic, knowledge-driven, and customer focused philosophy that continuously eradicates waste and generates value, with a goal to improve a company's productivity, efficiency, and quality. Successful implementation of lean does not only offer cost reduction and improved quality and productivity, but also provides efficient guidance for organizations to attain significant and continued growth. Although its adoption by companies has proven successful in developed countries, there is no sufficient evidence of its successful implementation in developing countries such as Saudi Arabia. A review of the literature indicates that there is a need to study lean transformation in developing countries …
Enhanced Ablation By Femtosecond And Nanoseond Pulses, Haley Kerrigan
Enhanced Ablation By Femtosecond And Nanoseond Pulses, Haley Kerrigan
Electronic Theses and Dissertations
Laser ablation of GaAs by a combination of femtosecond and nanosecond pulses is investigated as a means of enhancing material removal by a femtosecond pulse in the filamentation intensity regime. We demonstrate for the first time increased ablation of GaAs by ultrafast laser pulse plasmas augmented by nanosecond pulse radiation from a secondary laser. Material removal during laser ablation is a complex process that occurs via multiple mechanisms over several timescales. Due to different pulse durations, ablation by femtosecond and nanosecond pulses are dominated by different mechanisms. Ablation can be enhanced by optimally combining a femtosecond and nanosecond pulse in …
A Framework For Measuring Return On Investment For Healthcare Simulation-Based Training, Hatim Bukhari
A Framework For Measuring Return On Investment For Healthcare Simulation-Based Training, Hatim Bukhari
Electronic Theses and Dissertations
In the healthcare sector, providing high-quality service in a safe environment for both patient and staff is an obvious and ultimate major objective. Training is an essential component for achieving this important objective. Most organizations acknowledge that employee simulation-based training programs are an important part of the human capital strategy, yet few have effectively succeeded in quantifying the real and precise ROI of this type of investment. Therefore, if the training is perceived as a waste of resources and its ROI is not clearly recognized, it will be the first option to cut when the budget cut is needed. The …
Developing An Insider Threat Experimental Environment, Eric Ortiz
Developing An Insider Threat Experimental Environment, Eric Ortiz
Electronic Theses and Dissertations
Simulated, 3D gaming environments have been used for a wide-range of applications including training, entertainment, and experimentation in an assortment of domains for some time. This can be attributed to their unique ability to emulate multifaceted situations that may be difficult to control, while affording participants the opportunity to operate in a relatively safe environment. In cybersecurity research, investigation of insider threat behavior is an endeavor that has received little attention in terms of available environments and resources for experimental manipulation. This research effort aimed to close this gap. A simulated, 3D gaming environment and accompanying scenarios were developed for …
A Triangulation Based Coverage Path Planning For A Mobile Robot With Circular Sensing Range, Vatana An
A Triangulation Based Coverage Path Planning For A Mobile Robot With Circular Sensing Range, Vatana An
Electronic Theses and Dissertations
In this dissertation, two coverage path planning (CPP) approaches for a nonholonomic mobile robot are proposed. The first approach is the Local Coverage Path Planning (LCPP) approach which is designed for all sensing ranges. The second approach is the Global Coverage Path Planning (GCPP) approach which is designed for sufficient sensing range that can observe all points of interests in the target region (TR). The LCPP approach constructs CP after finding observer points for all local regions in the TR. The GCPP approach computes observer points after CP construction. Beginning with the sample TR, the LCPP approach requires 8 algorithms …
Spray-Deposited Titanium-Oxide Films For Infrared Optics, Photonics, And Solar Cell Applications., Sarmad Alhasan
Spray-Deposited Titanium-Oxide Films For Infrared Optics, Photonics, And Solar Cell Applications., Sarmad Alhasan
Electronic Theses and Dissertations
Self-assembled TiO2 foam-like films, were grown by the water based Streaming Process for Electrodeless Electrochemical Deposition (SPEED). The morphology of the ∼1 µm thick films consists of a tangled ropy structure with individual strands of ∼ 200 nm diameter and open pores of 0.1 to 3 micron dimensions. Such films are advantageous for proposed perovskite solar cell comprising CH3NH3PbI3 absorber with additional inorganic films as contact and conduction layers, all deposited by SPEED. Lateral film resistivity is in the range 20 - 200 kΩ-cm, increasing with growth temperature, while sheet resistance is in the range 2 − 20 × 108 …
A Holistic Framework For Effective Engineering Leadership Development Using 3d Virtual World Simulation, Hamed Almalki
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 …
The Effect Of Baldrige Performance Excellence Program On Organization's Innovation/Dynamic Capabilities, Mohammed Alomairy
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 …
Understanding Hydroclimatic Controls On Stream Network Dynamics Using Lidar Data, Seoyoung Kim
Understanding Hydroclimatic Controls On Stream Network Dynamics Using Lidar Data, Seoyoung Kim
Electronic Theses and Dissertations
This dissertation investigates the hydroclimatic controls on drainage network dynamics and characterizes the variation of drainage density in various climate regions. The methods were developed to extract the valley and wet channel networks based on Light Detection and Ranging (LiDAR) data including the elevation and intensity of laser returns. The study watersheds were selected based on the availability of streamflow observations and LiDAR data. Climate aridity index was used as a quantitative indicator for climate. The climate controls on drainage density were re-visited using watersheds with minimal anthropogenic interferences and compared with the U-shape relationship reported in the previous studies. …
Live Versus Virtual: Cost Benefit Analysis For Applying Simulation Towards Army Aviator Flight Minimums, Dylan Morelle
Live Versus Virtual: Cost Benefit Analysis For Applying Simulation Towards Army Aviator Flight Minimums, Dylan Morelle
Electronic Theses and Dissertations
The Longbow Crew Trainer (LCT) is a cost effective, safe alternative to live training in the AH-64D/E Apache helicopter. Current Army doctrine and regulations have provisions for the limited use of simulator in lieu of aircraft hours toward semiannual minimum flight hour requirements. With the defense budget in decline, the Army must find innovative, cost effective methods to conduct realistic, relevant training to sustain proficiency in their warfighting capabilities. The LCT fully replicates the cockpit environment through training scenarios for requisite crew tasks and missions in a realistic, modular, and transportable solution. An attack helicopter crew can safely train in …
An Integrated Hydrodynamic-Marsh Model With Applications In Fluvial, Marine, And Mixed Estuarine Systems, Karim Alizad
An Integrated Hydrodynamic-Marsh Model With Applications In Fluvial, Marine, And Mixed Estuarine Systems, Karim Alizad
Electronic Theses and Dissertations
Coastal wetlands experience fluctuating productivity when subjected to various stressors. One of the most impactful stressors is sea level rise (SLR) associated with global warming. Research has shown that under SLR, salt marshes may not have time to establish an equilibrium with sea level and may migrate landward or become open water. Salt marsh systems play an important role in the coastal ecosystem by providing intertidal habitats and food for birds, fish, crabs, mussels, and other animals. They also protect shorelines by dissipating flow and damping wave energy through an increase in drag forces. Due to the serious consequences of …
An Experimental Investigation Of The State Of Creativity, Critical Thinking And Creativity Training In Undergraduate Engineering Students, Eric Sola
Electronic Theses and Dissertations
This research explores creativity and critical thinking skills in undergraduate engineering students. The study undertook two experiments in order to gather a better understanding of several factors regarding the interactions between students' creative abilities and the effects of the undergraduate engineering curriculum. Experiment 1 focused on the differences in creative and critical thinking skills in freshman versus senior undergraduate engineering students. Experiment 2 centered on the variation in the effects of long-term versus short-term creativity training on senior engineering students. Creative skill was measured using the Test for Creative Thinking – Drawing Production (TCT-DP) developed by Urban and Jellen (2010). …
A Systems Approach To Assessing, Interpreting And Applying Human Error Mishap Data To Mitigate Risk Of Future Incidents In A Space Exploration Ground Processing Operations Environment, Tiffaney Alexander
Electronic Theses and Dissertations
Research results have shown that more than half of aviation, aerospace and aeronautics mishaps/incidents are attributed to human error. Although many existing incident report systems have been beneficial for identifying engineering failures, most of them are not designed around a theoretical framework of human error, thus failing to address core issues and causes of the mishaps. Therefore, it is imperative to develop a human error assessment framework to identify these causes. This research focused on identifying causes of human error and leading contributors to historical Launch Vehicle Ground Processing Operations mishaps based on past mishaps, near mishaps, and close calls. …
An Integrated Design For Six Sigma-Based Framework To Align Strategy, New Process Development, And Customer Requirements In The Airlines Industry, Mohammed Alghamdi
An Integrated Design For Six Sigma-Based Framework To Align Strategy, New Process Development, And Customer Requirements In The Airlines Industry, Mohammed Alghamdi
Electronic Theses and Dissertations
When organizations create new strategy maps, key new processes are often identified. This is important for organizations to stay competitive in the global marketplace. This document describes the development, implementation, and validation of a framework that properly aligns and links an organization's strategy and new process development. The proposed framework integrates the Balanced Scorecard management system (BSC) and the Design for Six Sigma (DFSS) methodology, leveraging their strengths, overcoming weaknesses, and identifying lessons learned to help bridge the gap between strategy development and execution. The critical-to-quality conceptual model is used as an integrative component for the framework. Literature search has …
A Predictive Model To Identify Caregivers At Risk Of Musculoskeletal Disorders, Abdulelah Ali
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 …
Assessing Safety Culture Among Personnel In Governmental Construction Sites At Saudi Arabia: A Quantitative Study Approach, Omar Alrehaili
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 …
A Framework To Generate A Smart Manufacturing System Configurations Using Agents And Optimization, Khalid Nagadi
A Framework To Generate A Smart Manufacturing System Configurations Using Agents And Optimization, Khalid Nagadi
Electronic Theses and Dissertations
Manufacturing is a crucial element in the global economy. During the last decade, the national manufacturing sector loses nearly 30% of its workforce and investments. Consequently, the quality of the domestic goods, global share, and manufacturing capabilities has been declined. Therefore, innovative ways to optimize the usage of the Smart Manufacturing Systems (SMS) are required to form a new manufacturing era. This research is presenting a framework to optimize the design of SMS. This includes the determination of the suitable machines that can perform the job efficiently, the quantity of those machines, and the potential messaging system required for sharing …
Safety Climate And Safety Outcomes In Aircraft Maintenance: A Mediating Effect Of Employee Turnover And Safety Motivation, Muhanna Alnoaimi
Safety Climate And Safety Outcomes In Aircraft Maintenance: A Mediating Effect Of Employee Turnover And Safety Motivation, Muhanna Alnoaimi
Electronic Theses and Dissertations
Aircraft maintenance is viewed as a critical safety component in general and military aviation industries, and thus it is crucial to identify the factors that may affect aircraft maintenance. Because the safety climate is considered as a leading indicator of safety performance and safety outcomes, this study utilized this safety climate approach to develop a model which can explain the relationships between employee turnover, safety motivation, self-reported unsafe acts, reporting unsafe behaviors, incidents, and injuries in the aviation maintenance environment. This study included a sample of 283 technicians in military aircraft maintenance units who participated in a cross-sectional random survey. …
Comparison Of Modeling Methods For Power Cycle Components Using Supercritical Carbon Dioxide As The Operating Fluid, Joshua Schmitt
Comparison Of Modeling Methods For Power Cycle Components Using Supercritical Carbon Dioxide As The Operating Fluid, Joshua Schmitt
Electronic Theses and Dissertations
Supercritical carbon dioxide as a working fluid in a Brayton power cycle has benefits but also faces unique challenges in implementation. With carbon dioxide, turbomachinery is much more compact and potentially more cost effective. The primary impediments to cycle component performance are the high pressures required to bring the fluid to a supercritical state and the wildly varying fluid properties near the critical point. Simple design models are often used as a quick starting point for modern turbomachinery and heat exchanger design. These models are reasonably accurate for design estimate, but often assume constant properties. Since supercritical carbon dioxide varies …
Tidal Hydrodynamic Response To Sea Level Rise And Coastal Geomorphology In The Northern Gulf Of Mexico, Davina Passeri
Tidal Hydrodynamic Response To Sea Level Rise And Coastal Geomorphology In The Northern Gulf Of Mexico, Davina Passeri
Electronic Theses and Dissertations
Sea level rise (SLR) has the potential to affect coastal environments in a multitude of ways, including submergence, increased flooding, and increased shoreline erosion. Low-lying coastal environments such as the Northern Gulf of Mexico (NGOM) are particularly vulnerable to the effects of SLR, which may have serious consequences for coastal communities as well as ecologically and economically significant estuaries. Evaluating potential changes in tidal hydrodynamics under SLR is essential for understanding impacts to navigation, ecological habitats, infrastructure and the morphologic evolution of the coastline. The intent of this research is to evaluate the dynamic effects of SLR and coastal geomorphology …
The Effect Of Videogame Play On Robotic Surgery Skill Acquisition, Alyssa Tanaka
The Effect Of Videogame Play On Robotic Surgery Skill Acquisition, Alyssa Tanaka
Electronic Theses and Dissertations
Robotic surgery uses innovative technology to transcend a surgeon's skills when performing complex procedures. Currently, the only FDA approved robotic system is Intuitive's da Vinci Surgical System. While this system offers many advantages over other minimally invasive techniques, it also introduces a need for specialized training. Virtual reality simulators have emerged as valuable tools for standardized and objective robotic surgery skill training and assessments. In recent years, the idea of using video game technology in surgical education for laparoscopy has also been explored; however few have attempted to make a connection between video game experience and robotic surgical skills. Thus, …