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Articles 31 - 60 of 3081
Full-Text Articles in Engineering
Characterization Of Low Power Hfo2 Based Switching Devices For In-Memory Computing, Aseel Zeinati
Characterization Of Low Power Hfo2 Based Switching Devices For In-Memory Computing, Aseel Zeinati
Theses
Oxide based Resistive Random Access Memory (RRAM) devices are investigated as one of the promising non-volatile memories to be used for in-memory computing that will replace the classical von Neumann architecture and reduce the power consumption. These applications required multilevel cell (MLC) characteristics that can be achieved in RRAM devices. One of the methods to achieve this analog switching behavior is by performing an optimized electrical pulse. The RRAM device structure is basically an insulator between two metals as metal-insulator-metal (MIM) structure. Where one of the primary challenges is to assign an RRAM stack with both low power consumption and …
Egg Drop Challenge, Admin Stem For Success
Egg Drop Challenge, Admin Stem For Success
STEM for Success Resources
This interactive activity plan challenges students to build a container using limited materials that will protect a raw egg from a 4-6 foot drop.
Earthquake Resistant Buildings, Admin Stem For Success
Earthquake Resistant Buildings, Admin Stem For Success
STEM for Success Showcase
Students learn about earthquakes and engineering by building a structure that can survive an earthquake.
Pumpkin Tower Activity, Admin Stem For Success
Pumpkin Tower Activity, Admin Stem For Success
STEM for Success Showcase
In this activity, students are challenged to build a tower to help a farmer watch his crops using only pumpkins and wood planks. Attached is a lesson plan and a teacher reflection on the activity
Balloon Tower Activity, Admin Stem For Success
Balloon Tower Activity, Admin Stem For Success
STEM for Success Showcase
This activity challenges students to build a safe and sound tower using only balloons and tape.
Farmer's Tower, Admin Stem For Success
Farmer's Tower, Admin Stem For Success
STEM for Success Showcase
Students are challenged to help a famer build a tower to monitor their crops using only wood planks and pumpkins.
Building Rotary Fans, Admin Stem For Success, Natalie Wilson
Building Rotary Fans, Admin Stem For Success, Natalie Wilson
STEM for Success Showcase
Students are challenged to build a working rotary fan
Marble Run Maze Challenge, Admin Stem For Success
Marble Run Maze Challenge, Admin Stem For Success
STEM for Success Showcase
Students are asked to use provided materials to design and build a successful marble run. Attached is the activity worksheet for students and the teacher reflection on the activity.
Lock Box Challenge, Admin Stem For Success, Natalie Wilson
Lock Box Challenge, Admin Stem For Success, Natalie Wilson
STEM for Success Showcase
Students are challenged to make a lock box
Bridge Building, Admin Stem For Success
Bridge Building, Admin Stem For Success
STEM for Success Showcase
Students learn about different bridge styles and designs in this activity that challenges them to build their own successful bridge.
Rubber Band Car Activity, Admin Stem For Success, Natalie Wilson
Rubber Band Car Activity, Admin Stem For Success, Natalie Wilson
STEM for Success Showcase
Student learn about forces and engineering by designing a car powered by rubber bands
Paper Chain Challenge, Admin Stem For Success, Natalie Wilson
Paper Chain Challenge, Admin Stem For Success, Natalie Wilson
STEM for Success Showcase
Activity Plan and teacher reflection on an activity where students work to creatively design the longest possible chain with limited materials
Windmill Building Activity, Admin Stem For Success, Natalie Wilson
Windmill Building Activity, Admin Stem For Success, Natalie Wilson
STEM for Success Showcase
Students are challenged to build a windmill that can lift weight
Balloon Boat Races, Admin Stem For Success, Natalie Wilson
Balloon Boat Races, Admin Stem For Success, Natalie Wilson
STEM for Success Showcase
Students build balloon boats to learn buoyancy and practice engineering design skills.
Claw Hand Activity, Admin Stem For Success, Natalie Wilson
Claw Hand Activity, Admin Stem For Success, Natalie Wilson
STEM for Success Showcase
Activity plan where students practice coding principles by programming the actions of a claw hand
Dash And Dot Robots, Admin Stem For Success, Natalie Wilson
Dash And Dot Robots, Admin Stem For Success, Natalie Wilson
STEM for Success Showcase
Activity plan using robots to teach students engineering and technology
Building Structures, Admin Stem For Success
Building Structures, Admin Stem For Success
STEM for Success Showcase
This activity challenges students to build a safe and sound structure using only candy and toothpicks.
Bubble Wand Activity, Admin Stem For Success
Bubble Wand Activity, Admin Stem For Success
STEM for Success Showcase
Students use this activity to practice their engineering skills by building a bubble wand.
Activity Video Link: https://www.youtube.com/watch?time_continue=15&v=wx0-NrAnE6c&feature=emb_logo
The Water Saver, Seth Levy
The Water Saver, Seth Levy
STEM for Success Showcase
Using the Engineering Design Process
The Wake Up Band, Zak Papadopoulos
Carrier Transport Engineering In Wide Bandgap Semiconductors For Photonic And Memory Device Applications, Ravi Teja Velpula
Carrier Transport Engineering In Wide Bandgap Semiconductors For Photonic And Memory Device Applications, Ravi Teja Velpula
Dissertations
Wide bandgap (WBG) semiconductors play a crucial role in the current solid-state lighting technology. The AlGaN compound semiconductor is widely used for ultraviolet (UV) light-emitting diodes (LEDs), however, the efficiency of these LEDs is largely in a single-digit percentage range due to several factors. Until recently, AlInN alloy has been relatively unexplored, though it holds potential for light-emitters operating in the visible and UV regions. In this dissertation, the first axial AlInN core-shell nanowire UV LEDs operating in the UV-A and UV-B regions with an internal quantum efficiency (IQE) of 52% are demonstrated. Moreover, the light extraction efficiency of this …
Improving The Stimulation Selectivity In The Human Cochlea By Strategic Selection Of The Current Return Electrode, Ozan Cakmak
Improving The Stimulation Selectivity In The Human Cochlea By Strategic Selection Of The Current Return Electrode, Ozan Cakmak
Dissertations
The hearing quality provided by cochlear implants are poorly predicted by computer simulations. A realistic cochlear anatomy is crucial for the accuracy of predictions. In this study, the standard multipolar stimulation paradigms are revisited and Rattay’s Activating Function is evaluated in a finite element model of a realistic cochlear geometry that is based on µ-CT images and a commercial lead. The stimulation thresholds across the cochlear fibers were investigated for monopolar, bipolar, tripolar, and a novel (distant) bipolar electrode configuration using an active compartmental nerve model based on Schwartz-Eikhof-Frijns membrane dynamics. The results suggest that skipping of the stimulation point …
Integrated Machine Learning And Optimization Approaches, Dogacan Yilmaz
Integrated Machine Learning And Optimization Approaches, Dogacan Yilmaz
Dissertations
This dissertation focuses on the integration of machine learning and optimization. Specifically, novel machine learning-based frameworks are proposed to help solve a broad range of well-known operations research problems to reduce the solution times. The first study presents a bidirectional Long Short-Term Memory framework to learn optimal solutions to sequential decision-making problems. Computational results show that the framework significantly reduces the solution time of benchmark capacitated lot-sizing problems without much loss in feasibility and optimality. Also, models trained using shorter planning horizons can successfully predict the optimal solution of the instances with longer planning horizons. For the hardest data set, …
Faceted Nanomaterial Synthesis, Characterizations And Applications In Reactive Electrochemical Membrane Filtration, Qingquan Ma
Faceted Nanomaterial Synthesis, Characterizations And Applications In Reactive Electrochemical Membrane Filtration, Qingquan Ma
Dissertations
Facet engineering of nanomaterials, especially metals and metal oxides has become an important strategy for tuning catalytic properties and functions from heterogeneous catalysis to electrochemical catalysis, photocatalysis, biomedicine, fuel cells, and gas sensors. The catalytic properties are highly related to the surface electronic structures, surface electron transport characteristics, and active center structures of catalysts, which can be tailored by surface facet control. The aim of this doctoral dissertation research is to study the facet-dependent properties of metal or metal oxide nanoparticles using multiple advanced characterization techniques. Specifically, the novel atomic force microscope-scanning electrochemical microscope (AFM-SECM) and density functional theory (DFT) …
Hydrodynamic Investigation Of The Discharge Of Complex Fluids From Dispensing Bottles Using Experimental And Computational Approaches, Baran Teoman
Dissertations
The discharge of non-Newtonian, complex fluids through orifices of industrial tanks, pipes, dispensers, or packaging containers is a ubiquitous but often problematic process because of the complex rheology of such fluids and the geometry of the containers. This, in turn, reduces the discharge rate and results in residual fluid left in the container, often referred to as heel. Heel formation is undesired in general, since it causes loss of valuable material, container fouling, and cross-contamination between batches. Heel may be of significant concern not only in industrial vessels but also in consumer packaging. Despite its relevance, the research in this …
Microhydrodynamic, Kinetic And Thermal Modeling Of Wet Media Milling For Process Optimization And Intensification, Gulenay Guner
Microhydrodynamic, Kinetic And Thermal Modeling Of Wet Media Milling For Process Optimization And Intensification, Gulenay Guner
Dissertations
Nanoparticle production by wet stirred media milling (WSMM) is a common method for the formulation of poorly water-soluble drugs. While most of the studies in the WSMM literature focus on the formulation aspects to overcome the stability challenges, a thorough mechanistic understanding of the process is lacking, and the process is slow, costly, and energy-intensive. This dissertation presents experimental and modeling work with the ultimate goals of (i) gaining a deeper and more mechanistic understanding of the WSMM process and breakage kinetics of the particles using a microhydrodynamic model with various improvements and advancements, (ii) examining the heat dissipation during …
Bioremediation Of Petroleum Hydrocarbons In Coastal Sediments, Charbel Abou Khalil
Bioremediation Of Petroleum Hydrocarbons In Coastal Sediments, Charbel Abou Khalil
Dissertations
The biodegradation of dispersed crude oil in the ocean is relatively rapid (a half-life of a few weeks). However, it is often much slower on shorelines, usually attributed to low moisture content, nutrient limitation, and higher oil concentrations in beaches than in dispersed plumes. Another factor may be the increased salinity of the upper intertidal and supratidal zones since these parts of the beach are potentially subject to prolonged evaporation and only intermittent inundation. Therefore, two laboratory experiments are conducted to investigate whether such an increase in porewater salinity results in additional inhibitory effects on oil biodegradation in seashores.
In …
Angiogenic Supports For Microvascular Engineering, Zain Siddiqui
Angiogenic Supports For Microvascular Engineering, Zain Siddiqui
Dissertations
Ischemic tissue disease is caused by a lack of circulation / blood supply to tissue. This can be treated by introducing a number of angiogenic (pro-blood vessel forming) factors into the tissue. This work presents strategies for ischemic tissue treatment utilizing a novel proangiogenic self-assembling peptide hydrogel platform. To demonstrate the utility of this platform, its use alone as an angiogenic therapeutic (both alone as a self-assembling hydrogel and with two-component systems), and its ability to vascularize implants is explored. Due to these angiogenic scaffolds demonstrating efficacy to regenerate microvasculature, this work evaluates diseases that can be treated by the …
Modeling Of Quad-Station Module Cluster Tools Using Petri Nets, Aung Nay
Modeling Of Quad-Station Module Cluster Tools Using Petri Nets, Aung Nay
Theses
The semiconductor industry is highly competitive, and with the recent chip shortage, the throughput of wafers has become more important than ever. One of the tools that the industry has deployed is to use of quad-station modules instead of the traditional single-station modules that allow for higher throughput and better wafer consistency by processing multiple wafers at the same time and distributing work. The industry trend is to use multiple transfer chamber robots to stack the quad-station modules in a series, particularly for etch products. In this work, the quad-station cluster tool wafer movement is modeled by using Petri net …
Journal Of Roleplaying Studies And Steam (Jrpssteam) Vol. 1 [2022], Issue 1., Cristo Leon, James Lipuma, Ricardo Morales-Carbajal, Miguel A. Bastarrachea-Magnani, Alain Arriaga, Christian Miguel Rudich De La Rosa, Edgar Meritano, Mauricio Rangel
Journal Of Roleplaying Studies And Steam (Jrpssteam) Vol. 1 [2022], Issue 1., Cristo Leon, James Lipuma, Ricardo Morales-Carbajal, Miguel A. Bastarrachea-Magnani, Alain Arriaga, Christian Miguel Rudich De La Rosa, Edgar Meritano, Mauricio Rangel
Journal of Roleplaying Studies and STEAM
Volumen completo del Journal of Roleplaying Studies and STEAM (JRPSSTEAM) Vol. 1 [2022], Issue 1.