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2020

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Articles 1201 - 1230 of 10640

Full-Text Articles in Engineering

Implementing Project Management Software Into A Small Residential Construction Company, Collin Peter Martin Nov 2020

Implementing Project Management Software Into A Small Residential Construction Company, Collin Peter Martin

Construction Management

Over the past twenty years, the popularity of web-based project management software in the construction industry has grown tremendously. Today, there are a variety of different project management software companies that aim to specifically serve the construction industry. Many construction companies have committed significant financial and personnel resources to the implementation of project management software. The largest users of project management software in the construction industry are large commercial and/or heavy civil construction firms. This is because of the large and complex nature of the projects these companies typically work on. Small residential construction companies deal with projects that are …

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Recycling Cigarettes Into Concrete, Jonathan R. Rosete Nov 2020

Recycling Cigarettes Into Concrete, Jonathan R. Rosete

Construction Management

The objective of my senior project is to find a solution for the growing amount of improperly disposed cigarette butts on our planet. To accomplish this, I created and tested concrete cylinders mixed with different amounts of used cigarettes. It is my goal that we will be able to recycle cigarette butts and incorporate them into our everyday concrete use. By adding cigarettes to our mixes, I also understand their will be concerns with its potential strength. However with this in mind, it is my intention that these current mixes will only be used for non-structural concrete. In the following, …

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Content Development For Leadership (Slo 23), Jaime A. Olmedo Nov 2020

Content Development For Leadership (Slo 23), Jaime A. Olmedo

Construction Management

As the construction industry evolves, the curriculum that prepares future builders must change and account for new ideas and concepts as well. In September of 2020, the Construction Management department at the California Polytechnic State University (Cal Poly) gave the opportunity to five senior level students to assist them with research on how to develop content and programming for the five extra student learning outcomes and have it count toward their senior project. These five students, each being paired up with a student from CM 461, were asked to produce a study guide and survey questions for one of the …

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Understanding Slo 22 - Lifelong Learning, Madeleine Zetterquist Nov 2020

Understanding Slo 22 - Lifelong Learning, Madeleine Zetterquist

Construction Management

This paper is an informative overview of the student learning objective SLO 22, lifelong learning, in relation to the California Polytechnic State University, San Luis Obispo Construction Management Department. The student learning objective of lifelong learning is an existing university objective for Cal Poly, however, recently has also become a department specific objective for Construction Management. This senior project explores what lifelong learning means to the Construction Management department. Further, the paper explores how the current outcomes of this objective may improve to more closely embody the department mission. These findings will allow for emphasis on lifelong learning in order …

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A Family Of High Voltage Gain Three-Level Step-Up Converters For Photovoltaic Module Integration Applications, Ahmad Alzahrani, Pourya Shamsi, Mehdi Ferdowsi Nov 2020

A Family Of High Voltage Gain Three-Level Step-Up Converters For Photovoltaic Module Integration Applications, Ahmad Alzahrani, Pourya Shamsi, Mehdi Ferdowsi

Electrical and Computer Engineering Faculty Research & Creative Works

This paper proposes a family of step-up three-level DC-DC converter topologies suitable for photovoltaic panel integration applications. The proposed family is suitable to convert the 10-30 V from photovoltaic panels to a 150 V direct current distribution bus. The proposed family enhances the three-level topology in terms of the voltage gain, power density, and filtering requirements at the input level. The filtration is reduced by interleaving. The three-level boost converter's voltage gain is enhanced by utilizing several options such as switched capacitor cells, switched inductor cells, and flyback transformers or coupled inductors. The enhancement techniques are illustrated by providing the …

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A 60 Ghz Pcb Wideband Antenna-In-Package For 5g/6g Applications, Lidong Chi, Zibin Weng, Yihong Qi, James L. Drewniak Nov 2020

A 60 Ghz Pcb Wideband Antenna-In-Package For 5g/6g Applications, Lidong Chi, Zibin Weng, Yihong Qi, James L. Drewniak

Electrical and Computer Engineering Faculty Research & Creative Works

A low-cost, wideband printed circuit boards (PCBs) manufactured antenna is proposed in this letter for 5G/6G antenna-in-package (AiP) applications with wideband common-mode current (surface-wave) choking characteristics. The antenna is based on a grounded, wideband, high-efficiency electromagnetic structure (WHEMS) and a backing cavity, in which a radiating choke is introduced. By changing the choking condition of a quarter-wavelength, widely applied in traditional low-frequency baluns, wideband common-mode current suppression is achieved. The enclosing wall of the backing cavity is realized by a combination of isolated grounded vias and connected grounded vias based on current polarization on the wall. Finally, a 22% impedance …

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An Exercise Device Used To Achieve Bone Formation Metrics For The Strengthening Of The Proximal Femur., Sean P. Coyle Nov 2020

An Exercise Device Used To Achieve Bone Formation Metrics For The Strengthening Of The Proximal Femur., Sean P. Coyle

Electronic Theses and Dissertations

Lateral falls often lead to hip fracture particularly in the elderly who have low bone mineral density. These fractures frequently lead to indirect mortality soon after injury. Normal use over the course over a lifetime leads to optimized adaptation of the bone in the proximal femur according to normal loading. A lateral fall generates non-normal, lateral loading at the proximal hip where the bone has not adapted to withstand such loading. The resulting fracture is generated by reversed strains on the bone tissue in the femoral neck in the hip in contrast to vertical, quotidian loading. Modern practices for preventing …

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Brazilian Regulation Aspects And Their Impact On Costs, Alexandre Berbel, Frederico Zaccaro, Philippe Dos Santos, Rogerio Maldonado Nov 2020

Brazilian Regulation Aspects And Their Impact On Costs, Alexandre Berbel, Frederico Zaccaro, Philippe Dos Santos, Rogerio Maldonado

Graduate Student Works

This project analyzes the Brazilian regulation for the airline and the current public data provided by the stakeholders. It intends to scientifically support a possible change in Brazil's existing regulation related to airline responsibilities on passenger accommodation for different types of situations, including ANAC 400 and other ramifications. This project aims to compare the Brazilian law with various regulations adopted in other markets where the rules are created considering different circumstances to define responsibilities for the passenger accommodations. This study will analyze the differences, measuring the impacts that changes could bring in terms of costs for the Airlines. It will …

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Parking Effects On Aircraft Reliability And Flight Performance, Danilo Scolfaro Fava, Fabio Renato Rossi Do Nascimento, Lucas Serrano Rodrigues, Rafael Gustavo Shoiti Yamashiro Nov 2020

Parking Effects On Aircraft Reliability And Flight Performance, Danilo Scolfaro Fava, Fabio Renato Rossi Do Nascimento, Lucas Serrano Rodrigues, Rafael Gustavo Shoiti Yamashiro

Graduate Student Works

During the pandemic period caused by Coronavirus (COVID-19) in 2020, the airlines have parked or stored their fleets partially or wholly worldwide. The International Air Transport Association (IATA) estimated a major downsize in approximately 65% of the worldwide airline fleet's airline operational activity at the end of April 2020. With that said, mechanical and electrical systems, when stopped during long periods, can deteriorate by corrosion, contamination, discharge, and oxidation (Boeing, 1998). During the aircraft parking or storage process, it is not different (Airbus, 2020). This study aims to understand how much the aircraft performance and reliability are affected by parking …

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Bs News November/December Nov 2020

Bs News November/December

Building Services Engineering

No abstract provided.

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2020 (Fall) Ensi Informer Magazine, Morehead State University. Engineering Sciences Department Nov 2020

2020 (Fall) Ensi Informer Magazine, Morehead State University. Engineering Sciences Department

ENSI Informer Magazine Archive

The ENSI Informer Magazine published in the fall of 2020.

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Strain And Stress Relationships For Optical Phonon Modes In Monoclinic Crystals With Β-Ga2O3 As An Example, Rafal Korlacki, Megan Stokey, Alyssa Lynn Mock, Sean Knight, Alexis Papamichail, Vanya Darakchieva, Mathias Schubert Nov 2020

Strain And Stress Relationships For Optical Phonon Modes In Monoclinic Crystals With Β-Ga2O3 As An Example, Rafal Korlacki, Megan Stokey, Alyssa Lynn Mock, Sean Knight, Alexis Papamichail, Vanya Darakchieva, Mathias Schubert

Department of Electrical and Computer Engineering: Faculty Publications

Strain-stress relationships for physical properties are of interest for heteroepitaxial material systems, where strain and stress are inherent due to thermal expansion and lattice mismatch. We report linear perturbation theory strain and stress relationships for optical phonon modes in monoclinic crystals for strain and stress situations which maintain the monoclinic symmetry of the crystal. By using symmetry group analysis and phonon frequencies obtained under various deformation scenarios from density-functional perturbation theory calculations on β-Ga2O3, we obtain four strain and four stress potential parameters for each phonon mode. We demonstrate that these parameters are sufficient to …

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Reinvestigation Of The Intrinsic Magnetic Properties Of (Fe1-Xcox)2b Alloys And Crystallization Behavior Of Ribbons, Tej Nath Lamichhane, Olena Palasyuk, Vladimir P. Antropov, Ivan A. Zhuravlev, Kirill Belashchenko, Ikenna C. Nlebedim, Kevin W. Dennis, Anton Jesche, Matthew J. Kramer, Sergey L. Bud'ko, R. William Mccallum, Paul C. Canfield, Valentin Taufour Nov 2020

Reinvestigation Of The Intrinsic Magnetic Properties Of (Fe1-Xcox)2b Alloys And Crystallization Behavior Of Ribbons, Tej Nath Lamichhane, Olena Palasyuk, Vladimir P. Antropov, Ivan A. Zhuravlev, Kirill Belashchenko, Ikenna C. Nlebedim, Kevin W. Dennis, Anton Jesche, Matthew J. Kramer, Sergey L. Bud'ko, R. William Mccallum, Paul C. Canfield, Valentin Taufour

Kirill Belashchenko Publications

New determination of the magnetic anisotropy from single crystals of (Fe1-xCox)2B alloys are presented. The anomalous temperature dependence of the anisotropy constant is discussed using the standard Callen-Callen theory, which is shown to be insufficient to explain the experimental results. A more material specific study using first-principles calculations with disordered moments approach gives a much more consistent interpretation of the experimental data. Since the intrinsic properties of the alloys with x=0.3-0.35 are promising for permanent magnets applications, initial investigation of the extrinsic properties are described, in particular the crystallization of melt spun ribbons with Cu, Al, …

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Anisotropic Cuinse2 Nanocrystals: Synthesis, Optical Properties And Their Effect On Photoelectric Response Of Dye-Sensitized Solar Cell, Ahmed Mysara, M Mohsen Abdelaziz, A N. Emam, A S. Mansour, A A. F. Zikry, M .B Mohamed, Y H. Elbashar Nov 2020

Anisotropic Cuinse2 Nanocrystals: Synthesis, Optical Properties And Their Effect On Photoelectric Response Of Dye-Sensitized Solar Cell, Ahmed Mysara, M Mohsen Abdelaziz, A N. Emam, A S. Mansour, A A. F. Zikry, M .B Mohamed, Y H. Elbashar

Nanotechnology Research Centre

CuInSe2 I-III-VI2 ternary is a semiconductor considered very good efficient solar energy conversion material. An organometallic pyrolysis method is used to prepare monodisperse CuInSe2 nanoparticles using a mixture of oleylamine, and trioctylphosphine, as capping materials. The particle shape changes to dot, rods or flowers occur via varying the reaction temperatures (160, 200, 220±C) respectively. The obtained particles have been characterized to determine the shape and size of CuInSe2 nanoparticles using HR-TEM and XRD. The optical and electronic properties of these particles have been investigated and discussed in detail. Then the different shapes of CuInSe …

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Basis Set Truncation Further Clarifies Vibrational Coherence Spectra, Daniel B. Turner, Paul C. Arpin Nov 2020

Basis Set Truncation Further Clarifies Vibrational Coherence Spectra, Daniel B. Turner, Paul C. Arpin

Materials Science and Engineering Faculty Publications and Presentations

Coherent vibrational oscillations in femtosecond transient-absorption spectra have been interpreted since the 1990s using a model based on Gaussian wavepacket dynamics. The oscillations are often studied using probe-wavelength dependent plots of the oscillation amplitude and phase that are known as vibrational coherence spectra. Here we show that restricting the basis of the wavepacket to a small number of eigenstates clarifies several features in vibrational coherence spectra. Improving the understanding of vibrational coherence signatures will help distinguish them from signatures of electronic coherence that arise from measurements of strongly coupled excitonic states in molecular aggregates and light-harvesting proteins.

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High-Performance Flexible Bismuth Telluride Thin Film From Solution Processed Colloidal Nanoplates, Madhusudan Kongara, Tony Varghese, Karthik Chinnathambi, Jesse Schimpf, Josh Eixenberger, Paul H. Davis, Yaqiao Wu, David Estrada Nov 2020

High-Performance Flexible Bismuth Telluride Thin Film From Solution Processed Colloidal Nanoplates, Madhusudan Kongara, Tony Varghese, Karthik Chinnathambi, Jesse Schimpf, Josh Eixenberger, Paul H. Davis, Yaqiao Wu, David Estrada

Materials Science and Engineering Faculty Publications and Presentations

Thermoelectric generators are an environmentally friendly and reliable solid‐state energy conversion technology. Flexible and low‐cost thermoelectric generators are especially suited to power flexible electronics and sensors using body heat or other ambient heat sources. Bismuth telluride (Bi2Te3) based thermoelectric materials exhibit their best performance near room temperature making them an ideal candidate to power wearable electronics and sensors using body heat. In this report, Bi2Te3 thin films are deposited on a flexible polyimide substrate using low‐cost and scalable manufacturing methods. The synthesized Bi2Te3 nanocrystals have a thickness of 35 ± …

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Bond Behavior Of Fabric Reinforced Geopolymeric Matrix-Concrete Joints, Feras Farid Tawfiq Abu Obaida Nov 2020

Bond Behavior Of Fabric Reinforced Geopolymeric Matrix-Concrete Joints, Feras Farid Tawfiq Abu Obaida

Civil and Environmental Theses

This research aimed to examine the potential use of a geopolymeric matrix as a sustainable alternative to commercial mortars in carbon fabric-reinforced matrix composites. Single-lap shear tests were conducted to examine the bond behavior at the fabric-matrix interface. Test parameters included the type of matrix (geopolymeric and cementitious matrices), the type of fabric (unidirectional and bidirectional) and the bonded length (50 to 300 mm). The geopolymeric matrix was a blend of fly ash/ground granulated blast furnace slag activated by an alkaline solution of sodium silicate and sodium hydroxide. The bond behavior of the geopolymeric-matrix specimens was characterized and compared to …

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Assessment Of The Roadside Design And Safety Status In The Emirate Of Abu Dhabi, Dina Mustafa Muhammad Awadalla Nov 2020

Assessment Of The Roadside Design And Safety Status In The Emirate Of Abu Dhabi, Dina Mustafa Muhammad Awadalla

Civil and Environmental Theses

Single-vehicle, run-off-road (SVROR) crashes account for a significant portion of all road-related injuries and fatalities worldwide. However, no previous study has neither examined to what extent roadside design guidelines have been applied, nor (and most importantly) investigated whether having a compliant roadside design has a positive impact on reducing the likelihood of fatal injuries. Thus, the objectives of this research are i) to examine the level of roadside design compliance within the studied area based on the selected benchmark and ii) to investigate whether roadside design compliance has a positive impact on reducing the likelihood of fatal injuries in SVROR …

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Direct 3d Printing Of Silica Doped Transparent Magnesium Aluminate Spinel Ceramics, John M. Pappas, Xiangyang Dong Nov 2020

Direct 3d Printing Of Silica Doped Transparent Magnesium Aluminate Spinel Ceramics, John M. Pappas, Xiangyang Dong

Mechanical and Aerospace Engineering Faculty Research & Creative Works

Transparent magnesium aluminate spinel ceramics were additively manufactured via a laser direct deposition method in this study. With a minimum porosity of 0.3% achieved, highly transparent spinel samples with the highest total optical transmittance of 82% at a wavelength of 632.8 nm, were obtained by a 3D printing approach. However, cracking was found to be a major issue affecting printed spinel samples. To control prevalent cracking, the effect of silica dopants was investigated. Increased silica dopants reduced average total crack length by up to 79% and average crack density by up to 71%. However, a high dopant level limited optical …

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Efficient Yield Estimation Of Multiband Patch Antennas By Polynomial Chaos-Based Kriging, Leifur Leifsson, Xiaosong Du, Slawomir Koziel Nov 2020

Efficient Yield Estimation Of Multiband Patch Antennas By Polynomial Chaos-Based Kriging, Leifur Leifsson, Xiaosong Du, Slawomir Koziel

Mechanical and Aerospace Engineering Faculty Research & Creative Works

Yield estimation of antenna systems is important to check their robustness with respect to the uncertain sources. Since direct Monte Carlo sampling of accurate physics-based models can be computationally intensive, this work proposes the use of the polynomial chaos–Kriging (PC-Kriging) metamodeling method for fast yield estimation of multiband patch antennas. PC-Kriging integrates the polynomial chaos expansion (PCE) as the trend function of Kriging metamodel since the PCE is good at capturing the function tendency and Kriging is good at matching the observations at training points. The PC-Kriging method is demonstrated on two analytical cases and two multiband patch antenna cases …

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Design And Performance Of Polyurethane Elastomers Composed With Different Soft Segments, Xin Jin, Naisheng Guo, Zhanping You, Yiqiu Tan Nov 2020

Design And Performance Of Polyurethane Elastomers Composed With Different Soft Segments, Xin Jin, Naisheng Guo, Zhanping You, Yiqiu Tan

Michigan Tech Publications, Part 1

Thermoplastic polyurethane elastomers (TPUs) are widely used in a variety of applications as a result of flexible and superior performance. However, few scholars pay close attention on the design and synthesis of TPUs through the self‐determined laboratory process, especially on definite of chemical structures and upon the influence on properties. To investigate the properties of synthesized modifier based on chemical structure, firstly each kind of unknown structure and composition ratio of TPUs was determined by using a new method. Furthermore, the thermal characteristics and mechanical properties of modifiers were exposed by thermal characteristics and mechanics performance tests. The experimental results …

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Achievements And Prospects Of Advanced Pavement Materials Technologies, Zhanping You, Jian Long Zheng, Hainian Wang Nov 2020

Achievements And Prospects Of Advanced Pavement Materials Technologies, Zhanping You, Jian Long Zheng, Hainian Wang

Michigan Tech Publications, Part 1

No abstract provided.

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Iot Asset Tracker, Jonny M. Erickson, Matt A. Murray Nov 2020

Iot Asset Tracker, Jonny M. Erickson, Matt A. Murray

Electrical Engineering

This senior project will be the completion of an IoT asset Tracker. In today’s day and age, technology is weaving its way into every aspect of life. Because of this, we demand to know more and more information about everything that is going on in our lives. One of these needed pieces of information is knowing the location of our most valuable assets. This is the main goal of this project: to build a portable SMS driven GNSS tracking device. The device is designed to provide two methods of tracking for any mobile asset. The device will utilize a large …

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An Empirical Investigation Of The Dimensions Of Product Similarity Used In Design By Analogy Of Electromechanical Products, Arnold Nkoane Tsoka Nov 2020

An Empirical Investigation Of The Dimensions Of Product Similarity Used In Design By Analogy Of Electromechanical Products, Arnold Nkoane Tsoka

Theses and Dissertations

Analogical reasoning is known to be a core cognitive mechanism behind creative human tasks including the creativity in engineering design. Research shows that during product ideation, designers use analogy to transfer information from prior designs stored in their memory (the source of the analogy) to the task in hand (target of analogy). However, similar to any search process, the source product must be first identified as a potential candidate for analogy before this information transfer can take place. Two products can be similar along multiple dimensions such as their form, function, etc. The dimensions of similarity between two products that …

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Surf Leg Prosthetic 2, Aris C. Recidoro, Kyler D. Peterson, Alec C. Goodman Nov 2020

Surf Leg Prosthetic 2, Aris C. Recidoro, Kyler D. Peterson, Alec C. Goodman

Mechanical Engineering

The following final design review outlines the process our team took in order to create a prosthetic for surfing. With the results of the Surf Leg V1 prosthetic, we designed, created, and tested our own product. The goal was to create a prosthetic that can immediately be used by an individual for surfing. From our findings, we decided that the focus of our project was to improve upon different features of the prosthetic leg designed by the previous senior project team. Our main focus was to improve mobility and reduce the weight of the ankle mechanism. The choice of Aluminum …

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Bridge Design Replacement Project For The Charenton Canal Bridge On La 87 And Comparison Of Deck Design Methods, Emily Rone Nov 2020

Bridge Design Replacement Project For The Charenton Canal Bridge On La 87 And Comparison Of Deck Design Methods, Emily Rone

Honors Capstones

No abstract provided.

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Training Synergy, Andre Vieira Caputo, Everton Amieiroe, Lucio De Araujo Alves, Renan Dapena Roveran, Leila Halawi Nov 2020

Training Synergy, Andre Vieira Caputo, Everton Amieiroe, Lucio De Araujo Alves, Renan Dapena Roveran, Leila Halawi

Publications

Brazil is facing a growth in the airline industry where all the major airlines are currently hiring pilots, flight attendants, and mechanics. One of the challenges of those airlines is to provide training for all these professionals. Many times they do not have instructors or classrooms available. It is crucial for the airlines to promote faster and better training, to reduce cost, save time and resources to prepare a better professional. In this paper, we are showing the possibility of increasing the cost performance of airline training by providing alternatives to airlines. The idea is to promote synergy between the …

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Enterprise Architecture Transformation Process From A Federal Government Perspective, Tonia Canada, Leila Halawi Nov 2020

Enterprise Architecture Transformation Process From A Federal Government Perspective, Tonia Canada, Leila Halawi

Publications

The need for information technology organizations to transform enterprise architecture is driven by federal government mandates and information technology budget constraints. This qualitative case study aimed to identify factors that hinder federal government agencies from driving enterprise architecture transformation processes from a compliancy to a flexible process. Common themes in interviewee responses were identified, coded, and summarized. Critical recommendations for future best practices, including further research, were also presented.

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Feasibility Study Of A Mems Threshold-Pressure Sensor Based On Parametric Resonance: Experimental And Theoretical Investigations, Mark Pallay, Meysam Daeichin, Shahrzad Towfighian Nov 2020

Feasibility Study Of A Mems Threshold-Pressure Sensor Based On Parametric Resonance: Experimental And Theoretical Investigations, Mark Pallay, Meysam Daeichin, Shahrzad Towfighian

Mechanical Engineering Faculty Scholarship

A tunable threshold pressure sensor based on para- metric resonance of a microbeam subjected to electrostatic levitation is proposed. Parametric excitation can trigger a large amplitude vibration at twice the natural frequency if the mag- nitude of the driving force is large enough to overcome energy loss mechanisms in the system such as squeeze film damping. This causes a temporarily unstable response with a significant gain in oscillation amplitude over time until it is eventually capped by nonlinearities in the force or material or geometric properties. The instability divides the frequency region into two regions: distinct responses bounded by the …

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Determination Of Construction Site Elevations Using Drone Technology, Yuhan Jiang, Yong Bai Nov 2020

Determination Of Construction Site Elevations Using Drone Technology, Yuhan Jiang, Yong Bai

Civil and Environmental Engineering Faculty Research and Publications

Image-based 3D-reconstruction techniques, such as drone photogrammetry, have been adopted to various construction operations. The challenge is determining the construction site elevation, which is the vertical distance from the ground to the camera, in real-time. This paper presents the research results of using two frame drone-based ortho-images to estimate the elevation of a construction site. This idea is derived from the stereo vision model for measuring distance of indoor scenes. The spatial resolution of the stereo vision is a positive correlation with its baseline, the distance between two cameras. However, a large baseline stereo cameras system is impossible for a …

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