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Articles 91 - 120 of 11272
Full-Text Articles in Engineering
Water Play, Jane E. Cline, Brandy A. Smith
Water Play, Jane E. Cline, Brandy A. Smith
Journal of STEM Arts, Crafts, and Constructions
The inclusion of activities to develop sensory awareness, spatial thinking, and physical dexterity, operationalized through hands-on science lessons such as water play, have long been part of early childhood education. This practical article addresses Next Generation Science Standards K-2 ETS1-3 and K-2 ETS1-2 by having four-year-old prekindergarten students direct the path of water on a vertical pegboard water table with strategically-placed, attached plastic cups with holes drilled into them that leak streams of water into each other. Students enhanced their retelling of the story of the Billy Goats Gruff by placing student-made watercolor artwork along the path of the water, …
Using Creativity From Art And Engineering To Engage Students In Science, Mason Albert Kuhn, Scott Greenhalgh, Mark Mcdermott
Using Creativity From Art And Engineering To Engage Students In Science, Mason Albert Kuhn, Scott Greenhalgh, Mark Mcdermott
Journal of STEM Arts, Crafts, and Constructions
STEAM education, referring to integrated Science, Technology, Engineering, Art, and Mathematics, is a contemporary buzzword that is popular in many schools. In particular, many elementary school teachers who have been tasked to incorporate STEM teaching, because of the requirements of the Next Generation Science Standards, attempt to apply the arts in their science curriculum because they feel more comfortable using instructional approaches that incorporate creative activities such as crafts, drawing, and model construction than the core practices of STEM disciplines. Teachers can use the creative arts activities in two ways to enhance the STEM learning environment: 1) Using creative processes …
Spatial Thinking Skills And Stem Connections: How Does This Issue Address Them?, Audrey C. Rule
Spatial Thinking Skills And Stem Connections: How Does This Issue Address Them?, Audrey C. Rule
Journal of STEM Arts, Crafts, and Constructions
In this editorial, the Editor considered the importance of spatial thinking skills to STEM careers, provided examples of ways scientists use spatial thinking, noted sex and socioeconomic differences in spatial skill proficiency, and reviewed ways that activities included in articles in this issue involved spatial thinking. Brief summaries and preview images were provided for the articles in the issue. The four-component spatial thinking classification scheme with categories of intrinsic-static, intrinsic-dynamic, extrinsic-static and extrinsic dynamic was applied to the activities from this issue of the Journal of STEM Arts, Crafts, and Constructions. All categories of this classification scheme were addressed, providing …
The Effect Of A Powered Ankle Foot Orthosis On Walking In A Stroke Subject: A Case Study, Ali Pourghasem, Ismail Ebrahimi Takamjani, Mohammad Taghi Karimi, Mohammad Kamali, Mohammad Jannesari, Iman Salafian
The Effect Of A Powered Ankle Foot Orthosis On Walking In A Stroke Subject: A Case Study, Ali Pourghasem, Ismail Ebrahimi Takamjani, Mohammad Taghi Karimi, Mohammad Kamali, Mohammad Jannesari, Iman Salafian
Department of Mechanical and Materials Engineering: Faculty Publications
[Purpose] Standing and walking are impaired in stroke patients. Therefore, assisted devices are required to restore their walking abilities. The ankle foot orthosis with an external powered source is a new type of orthosis. The aim of this study was to evaluate the performance of a powered ankle foot orthosis compared with unpowered orthoses in a stroke patient.
[Subjects and Methods] A single stroke subject participated in this study. The subject was fitted with three types of ankle foot orthosis (powered, posterior leg spring, and carbon ankle foot orthoses). He was asked to walk with and without the three types …
Finite Element Simulation And Additive Manufacturing Of Stiffness-Matched Niti Fixation Hardware For Mandibular Reconstruction Surgery, Ahmadreza Jahadakbar, Narges Shayesteh Moghaddam, Amirhesam Amerinatanzi, David Dean, Haluk E. Karaca, Mohammad Elahinia
Finite Element Simulation And Additive Manufacturing Of Stiffness-Matched Niti Fixation Hardware For Mandibular Reconstruction Surgery, Ahmadreza Jahadakbar, Narges Shayesteh Moghaddam, Amirhesam Amerinatanzi, David Dean, Haluk E. Karaca, Mohammad Elahinia
Mechanical Engineering Faculty Publications
Process parameters and post-processing heat treatment techniques have been developed to produce both shape memory and superelastic NiTi using Additive Manufacturing. By introducing engineered porosity, the stiffness of NiTi can be tuned to the level closely matching cortical bone. Using additively manufactured porous superelastic NiTi, we have proposed the use of patient-specific, stiffness-matched fixation hardware, for mandible skeletal reconstructive surgery. Currently, Ti-6Al-4V is the most commonly used material for skeletal fixation devices. Although this material offers more than sufficient strength for immobilization during the bone healing process, the high stiffness of Ti-6Al-4V implants can cause stress shielding. In this paper, …
Computer Network Design For Universities In Developing Countries, Rafid Salih Sarhan Alsarhan
Computer Network Design For Universities In Developing Countries, Rafid Salih Sarhan Alsarhan
Information Technology Capstone Research Project Reports
The purpose of this project is to design a suitable network system for universities in developing countries. The aim was to design a network with high-quality security and low cost, in such a way that network devices of universities in developing countries, will meet standards associated with the universities in developed countries. This project will help to enhance education in developing countries. There are many devices that were used in designing the network, such as routers, switches, backup, firewall, and servers. All devices were connected to each other to make integration network system and configured by putting IP addresses to …
Phased Helical Antenna Array For Cubesat Application, Kameron Lacalli
Phased Helical Antenna Array For Cubesat Application, Kameron Lacalli
Undergraduate Honors Theses
CubeSats communication links are typically slow due to their power and size restrictions. However, a low power, high speed down link connection can allow for greater data collection and relaying, pushing the capability of 1U CubeSats beyond what is traditionally thought possible. Investigated here is the feasibility of a 11 Mb/s down link connection on a 1U CubeSat, accomplished via 2x2 helical antenna phased array operating on the 802.11 standard. Using a phased array also allows for beam steering to secure connection with the ground station when the on board ADCS may not provide precise pointing capability of the CubeSat, …
Liquid Phase Nano Metal Catalyzed Dechlorination Of Chlorinated Organic Compounds, Omneya El-Sharnouby
Liquid Phase Nano Metal Catalyzed Dechlorination Of Chlorinated Organic Compounds, Omneya El-Sharnouby
Electronic Thesis and Dissertation Repository
1,2-Dichloroethane (1,2-DCA) is among the most prevalent groundwater chlorinated organic compounds (COCs) found at hazardous sites throughout the world. Given its pervasive contamination and adverse health effects, there is considerable interest in developing novel remediation technologies for successfully treating 1,2-DCA along with other COCs from water sources. Chemical reduction by nano zero valent iron (monometallic (nZVI) or bimetallic (Pd-nZVI)) has proven to be a successful field applicable technology, yet it has failed in degrading such a recalcitrant compound as 1,2-DCA.
In this study, the development of a field applicable nano metal based technology capable of degrading 1,2-DCA was carried out. …
Design And Realization Of A Nonlinear Vibration Energy Harvester For Cost Effective Additive Manufacturing, Rodrigo Barriuso De Juan
Design And Realization Of A Nonlinear Vibration Energy Harvester For Cost Effective Additive Manufacturing, Rodrigo Barriuso De Juan
Masters Theses
Environmental energy harvesting has always been an attractive solution to the search for sustainable energy sources. Combined with the miniaturization and power consumption reduction of sensors and portable electronic devices, the possibility of powering using environmental energy, like vibration energy, instead of conventional batteries increases exponentially. Vibrational energy harvesting can be achieved using devices based on different physical phenomena. Electromagnetic based devices seem to be among the most effective when considering the power output levels within low frequency applications. However, these devices have always had inherent challenges including size and manufacturing cost reduction as well as limitations on the range …
Process Development For High Powered Amplifier Au/Sn Eutectic Die Attach Via Vacuum Furnace, Zachary F. Blanden
Process Development For High Powered Amplifier Au/Sn Eutectic Die Attach Via Vacuum Furnace, Zachary F. Blanden
Graduate Dissertations and Theses
This research was conducted to develop and qualify a vacuum GaAs semiconductor monolithic microwave integrated circuit die attach process. Research was done to understand the causes and effects of voiding levels on device performance and reliability. Simultaneous investigation was done to qualify vacuum-attach as a successful methodology by which minimal voiding levels were achieved. After an initial vacuum-attach trial was completed to verify the methodology, internal accept/reject criteria were developed to qualify die attach interfaces. A dual phase attachment methodology was created to minimize tolerance stacking resulting in more consistent component placement. MATLAB image processing code was developed to quantify …
Jual Obat Erogan Pembesar Penis Asli Di Tangerang 085712176269, Dokter Aling
Jual Obat Erogan Pembesar Penis Asli Di Tangerang 085712176269, Dokter Aling
Obat Hammer Of Thor Asli Original
Curricular Analytics In Higher Education, Ahmad Slim 3589498
Curricular Analytics In Higher Education, Ahmad Slim 3589498
Electrical and Computer Engineering ETDs
The dissertation addresses different aspects of student success in higher education. Numerous factors may impact a student's ability to succeed and ultimately graduate, including pre-university preparation, as well as the student support services provided by a university. However, even the best efforts to improve in these areas may fail if other institutional factors overwhelm their ability to facilitate student progress. This dissertation addresses this issue from the perspective of curriculum structure. The structural properties of individual curricula are studied, and the extent to which this structure impacts student progress is explored. The structure of curricula are studied using actual university …
On Frequency Variation Of Dynamic Resting-State Functional Brain Network Activation And Connectivity With Applications To Both Healthy And Clinical Populations, Maziar Yaesoubi
Electrical and Computer Engineering ETDs
One of the earliest and fundamental observation in scientific study of the brain was discovering the relation between activities in different local regions of brain and some core functions of the brain. This was later followed by observing that not only local activities of regions but also synchronous activities between distributed brain regions play a key role in high-level brain functions. Synchronous activity related to the functions of the brain is commonly referred to as functional connectivity (FC) and is studied in the form of connectivity states of the brain which measure degree of interactions between distributed parts of the …
An Ionization Chamber For High Resolution Fission Product Spectroscopy, James Cole
An Ionization Chamber For High Resolution Fission Product Spectroscopy, James Cole
Nuclear Engineering ETDs
The fission process has played a vital role in the world’s search for effective sources of alternative energy. With almost 80 years of work with fissionable material there is still much that is unknown about the process. Fission fragment mass and atomic number distributions are still lacking in completeness and critical detail. Knowledge of this information is highly sought after in the effort to improve various fields of nuclear physics and engineering such as reactor design, predictive models, waste disposal methods, and an overall understanding of the fission process. In an effort to better understand this process, we have developed …
A Visual Velocity Impedance Controller, Victor Nevarez
A Visual Velocity Impedance Controller, Victor Nevarez
Mechanical Engineering ETDs
Successful object insertion systems allow the object to translate and rotate to accommodate contact forces. Compliant controllers are used in robotics to provide this accommodation. The impedance compliant controller is one of the more researched and well known compliant controllers used for assembly. The velocity filtered visual impedance controller is introduced as a compliant controller to improve upon the impedance controller. The velocity filtered impedance controller introduces a filter of the velocity impedance and a gain from the stiffness. The velocity impedance controller was found to be more stable over larger ranges of stiffness values than the position based impedance …
Drag And Shape Analysis Of Fiberglass Particles, Cody Williams
Drag And Shape Analysis Of Fiberglass Particles, Cody Williams
Mechanical Engineering ETDs
Settling tests were performed on particles of NUKON fiberglass to relate the drag coefficient of the particles to the Reynolds number of the particles. A new method was developed to measure fiberglass particles. The projected area, projected perimeter, and average height of the particles are measured using this method. The measurements are used to calculate the measured drag coefficient and measured Reynolds number for the particles. Data collected was compared to previous studies that focused on the settling of sand grains. A predictive correlation that was developed for sand grains was applied towards the particles of fiberglass. Tests were run …
Fault Discrimination Algorithm For Busbar Differential Protection Relaying Using Partial Operating Current Characteristics, Monir Hossain
Fault Discrimination Algorithm For Busbar Differential Protection Relaying Using Partial Operating Current Characteristics, Monir Hossain
University of New Orleans Theses and Dissertations
Differential protection is the unit protection system which is applied to protect a particular unit of power systems. Unit is known as zone in protection terminology which is equivalent to simple electrical node. In recent time, low impedance current differential protection schemes based on percentage restrained characteristics are widely used in power systems to protect busbar systems. The main application issue of these schemes is mis-operation due to current transformer (CT) saturation during close-in external faults. Researchers have suggested various solution of this problem; however, individually they are not sufficient to puzzle out all mis-operational scenarios. This thesis presents a …
Design Of A Modified Stewart Platform Manipulator For Misalignment Correction, Adekunle Ayoko
Design Of A Modified Stewart Platform Manipulator For Misalignment Correction, Adekunle Ayoko
Master of Technology Management Plan II Graduate Projects
This thesis work is about the design of a modified Stewart platform manipulator for misalignment correction. The common version of the Stewart platform uses six actuators. The traditional Stewart platform of this kind has a moving top plate and a fixed base plate. However, in this research, the modified design of the traditional Stewart platform is studied. It is designed to be an easy connect-disconnect platform that can wrap around different structures with different cross sections and symmetrically designed. It is able to adjust position easily by using four identical but independent linear actuators populated evenly in two parts fastened …
Zirconium Diboride, Hexagonal Boron Nitride, And Amorphous Alumina Thin Films For High Temperature Applications, David Murdock Stewart
Zirconium Diboride, Hexagonal Boron Nitride, And Amorphous Alumina Thin Films For High Temperature Applications, David Murdock Stewart
Electronic Theses and Dissertations
The use of microelectronic sensors and actuators in harsh, high temperature environments, such as power plants, turbine engines, and industrial manufacturing, could greatly improve the safety, reliability, and energy efficiency of these processes. The primary challenge in implementing this technology is the breakdown and degradation of thin films used in fabricating these devices when exposed to high temperatures >800 °C and oxidizing atmospheres. Zirconium diboride, hexagonal boron nitride, and amorphous alumina are candidate materials for use as thin film sensor components due to their high melting temperatures and stable phases. Zirconium diboride thin films have metallic-like electrical conductivity and remain …
Input Parameters In Discrete Element Modeling, Seyedali Yousefi
Input Parameters In Discrete Element Modeling, Seyedali Yousefi
Civil Engineering ETDs
The discrete element method (DEM) is employed to study complex behaviors of particulate media. Input parameters may greatly affect the response of DEM models and should therefore be selected carefully. Scaling techniques are employed to enlarge prohibitively small time-steps. To study these techniques, dimensionless input parameters were defined. Responses of models in the dimensionless scale were invariant with choice of density, elastic modulus, and characteristic length if the dimensionless parameters were kept constant. Hence, density scaling is equivalent to use of a higher strain-rate, and stiffness scaling results in a higher strain-rate and an elevated stress state in the dimensionless …
Experimental Methods And Practices For The Study Of Toroidal Inflated, Braided Fabric Members, Daniel J. Whitney
Experimental Methods And Practices For The Study Of Toroidal Inflated, Braided Fabric Members, Daniel J. Whitney
Electronic Theses and Dissertations
Inflatable structures have become a very important area of interest for many differing applications where lightweight packable structures are required. NASA is developing Hypersonic Inflatable Aerodynamic Decelerator (HIAD) technology that takes advantage of stacked, inflated fabric tori to form a decelerating spacecraft nose cone. The tori consist of a bladder, braided fabric shell, and reinforcing in the form of integral cords or externally bonded straps. The focus of this thesis is on the development of methods for the structural testing of inflated fabric tori and developing an enhanced understanding of their behavior. This is essential for providing insight into the …
Analysis Of 3d Cone-Beam Ct Image Reconstruction Performance On A Fpga, Devin Held
Analysis Of 3d Cone-Beam Ct Image Reconstruction Performance On A Fpga, Devin Held
Electronic Thesis and Dissertation Repository
Efficient and accurate tomographic image reconstruction has been an intensive topic of research due to the increasing everyday usage in areas such as radiology, biology, and materials science. Computed tomography (CT) scans are used to analyze internal structures through capture of x-ray images. Cone-beam CT scans project a cone-shaped x-ray to capture 2D image data from a single focal point, rotating around the object. CT scans are prone to multiple artifacts, including motion blur, streaks, and pixel irregularities, therefore must be run through image reconstruction software to reduce visual artifacts. The most common algorithm used is the Feldkamp, Davis, and …
Water Pump / Purification System: Industrial Mechanic Millwright Competition Project, Ryan Bullong, Keerin Moodly, Daniyal Azam, Chia-Wei Huang
Water Pump / Purification System: Industrial Mechanic Millwright Competition Project, Ryan Bullong, Keerin Moodly, Daniyal Azam, Chia-Wei Huang
5 Stage Reverse Osmosis Pedal Powered Water Pump Purification System
This report provides the details of an engineering design project undertaken by Mechanical Engineering Design and Drafting Technology students at the Sheridan College. The goal of this project is to design a water pump / purification system driven by the pedal power for the Worldskills 2017 IMM Competition. The design must be portable, easy to assemble and lightweight. A recumbent bicycle was designed at 60° due to its efficiency compared with traditional bicycle. An transmission system which included a gear box, couplings, shafts and pedals was designed in order to have output of 80rpm. The ratio of the gear box …
Study Of Mobile Robot Operations Related To Lunar Exploration, Matthew Cross
Study Of Mobile Robot Operations Related To Lunar Exploration, Matthew Cross
Electronic Thesis and Dissertation Repository
Mobile robots extend the reach of exploration in environments unsuitable, or unreachable, by humans. Far-reaching environments, such as the south lunar pole, exhibit lighting conditions that are challenging for optical imagery required for mobile robot navigation. Terrain conditions also impact the operation of mobile robots; distinguishing terrain types prior to physical contact can improve hazard avoidance.
This thesis presents the conclusions of a trade-off that uses the results from two studies related to operating mobile robots at the lunar south pole. The lunar south pole presents engineering design challenges for both tele-operation and lidar-based autonomous navigation in the context of …
Numerical Computation Of Transient Response Of 2d Wedge Impact, Naresh Kumar Koyyapu
Numerical Computation Of Transient Response Of 2d Wedge Impact, Naresh Kumar Koyyapu
University of New Orleans Theses and Dissertations
The diverse applications of advanced marine craft ascribed to their high speed and technological advancements has led to the use of stronger and lighter metals in such crafts. High speed, in effect also increases slamming loads as higher speed increases frequency of wave encounter while operating in waves. The present study is limited to wedge impact models. Fundamentally, the study is thus about two-dimensional (2D) wedge impact in water. In an attempt to predict the structural response to impact hydrodynamic force, a beam element based finite element (FE) computer program is written and the results of the code are presented …
Optimal Dg Placement: A Multimethod Analysis, Saiful A. Ratul
Optimal Dg Placement: A Multimethod Analysis, Saiful A. Ratul
University of New Orleans Theses and Dissertations
With Power System being restructured in the vision of Smart Grid, it is important now more than ever to find suitable locations to place Distributed Generators (DG). Distributed generators, which may be renewable, are not limited to specific locations as in the case of conventional generators. Several papers have been published that make suggestions on where the optimal location of DG should be in a system. Objectives ranging from loss minimization to total cost minimization have been the factor for such studies. In this study, a new method is introduced that hopes to improve a current system in three ways …
Factors Affecting Algal Biomass Growth And Cell Wall Destruction, Alicia E. Simosa
Factors Affecting Algal Biomass Growth And Cell Wall Destruction, Alicia E. Simosa
University of New Orleans Theses and Dissertations
Research using microalgae Chlorella vulgaris was conducted in order to determine the maximum CO2 concentration under which algae can grow, within the emission range from oil and natural gas burning plants (0-20%).
After choosing the optimal CO2 percentage, pH and alkalinity were determined; and finally, an electrochemical (EC) batch reactor connected to DC current was applied to achieve algae cell annihilation, and therefore, facilitate anaerobic digestion, methane production and energy recovery.
It was determined that algae can grow under 20% CO2, being 15% CO2 the most effective (pH of 6.64 and alkalinity of 617.5 mg/L CaCO …
The Mars Desert Research Station - Erau Crew 160 Expedition, Lycourgos Manolopoulos, Ashley Hollis-Bussey, Hiroki Sugimoto, Cassandra Vella, John Herman, Marc Carofano
The Mars Desert Research Station - Erau Crew 160 Expedition, Lycourgos Manolopoulos, Ashley Hollis-Bussey, Hiroki Sugimoto, Cassandra Vella, John Herman, Marc Carofano
Student Works
The Mars Desert Research Station (MDRS) is a research program which is owned and operated by the Mars Society. The MDRS is located in Hanksville, Utah which hosts simulations that are typically two weeks long for professional scientists and engineers as well as college students of all levels, in training for human operations specifically on Mars. This space analog facility is in isolation, allowing for rigorous field studies regarding research that represents a true mission as if the crew members are conducting a real expedition on Mars. Participants are assigned specific roles and tasks that are typically aligned with their …
Autonomous Satellite Recovery Vehicle (Asrv) Final Report, Devonte Grantham, Francisco Pastrana, Collin R. Topolski
Autonomous Satellite Recovery Vehicle (Asrv) Final Report, Devonte Grantham, Francisco Pastrana, Collin R. Topolski
Student Works
In collaboration with Embry-Riddle Future Space Explorers and Developers Society (ERFSEDS), we came up with the idea to build a quad-copter/sensor system that could be deployed from a rocket. The goal is to build a new chassis for the quad-copters electronic components that will allow the quad-copters arms to fold inwards to meet the required space constraints of a rocket. In addition to the critical components of the quad-copter, our design will integrate a number of other data collecting sub-systems currently being used in a weather balloon designed by Society 4 S.P.A.C.E. club members. After being jettisoned from the rocket, …
Active Management Assistant System For Embry-Riddle Ecocar 3 Hybrid Supervisory Control System, Matthew Nelson, Blair Cutting, Michael J. Aleardi
Active Management Assistant System For Embry-Riddle Ecocar 3 Hybrid Supervisory Control System, Matthew Nelson, Blair Cutting, Michael J. Aleardi
Student Works
The Embry-Riddle EcoCAR 3 team is developing a prototype hybrid Chevrolet Camaro utilizing a customized vehicle powertrain controller. This controller is serving to ensure system safety, vehicle operation, and consumer drivability while also incorporating advanced driving aids to achieve both the desired performance levels one expects from a Camaro as well as vehicle efficiency. This vehicle must reach the team set vehicle technical specifications of a 4.9 second 0 to 60 time while maintaining a 53 miles per gallon gasoline equivalence rating.
In order to reach the efficiency goal, the team is developing an Active Management Assistance System utilizing computer …