Engineering Commons^™

Scaling And Entropic Approaches To Clusters In Materials Science And In Network, Prosun Roy

Theses and Dissertations

The thesis we have studied, is about scaling and entropic content in various networks related to the material science, colloids and biological systems. The thesis is based on two papers:⦁ Nosonovsky M.; Roy P. Allometric scaling law and ergodicity breaking in the vascular system. Microfluidics and Nanofluidic-Springer. 2020 [Chapter 2 and 3] ⦁ Nosonovsky M.; Roy P. Scaling and Entropy in colloidal and neural networks. Entropy-MPDI. 2020 [Chapter 5 to 7] In chapter 2, we investigate scaling properties of vascular networks with fractal topology. Computational fluid dynamic (CFD) simulation of blood flow through one bifurcating vessel has been illustrated to …

Numerical And Experimental Investigation Of Aeration Self Mixing By Using Pulsating And Continuous Air Flow, Ahmed Ali Alkhafaji

Theses and Dissertations

Wastewater treatment is considered one of the most common forms of pollution control in the united states. Considered as an integral part of the wastewater treatment, the aeration process is the most energy-consuming process among all the processes that take place in any wastewater treatment plant. According to the United States Environmental Protection Agency (EPA), a wastewater treatment plant is expected to remove at least 85% of the suspended solids and dissolved organic compounds from the wastewater before discharging it to a river or a lake. The normal operation of the aeration process is by compressing air continuously to basin …

Intelligent Therapeutic Robot: Design, Development, And Control, Asif Al Zubayer Swapnil

Theses and Dissertations

This research contributes to developing an Intelligent Therapeutic Robot (iTbot) designed to provide therapy to patients with upper limb impairment due to stroke, injury, and other trauma. This robot aims to implement robotic rehabilitation based on principles of motor rehabilitation and Neuroplasticity. The iTbot, as developed in this research, can provide end-effector type rehabilitation exercises in various configurations, including motion in the vertical and horizontal plane. It can provide passive, active, and active-assisted rehabilitation therapies to patients with limited upper limb mobility.

The iTbot has been designed with simplicity in mind with a minimum viability approach. With a minimum amount …

The Instability Of Verge-Foliot Clocks In Contrast With The Isochronicity Of Pendulum Clocks: A Study Of Verge-Foliot Kinematics, Aaron Seth Blumenthal

Theses and Dissertations

The tower clocks of Europe starting in the 13th century CE employed a verge-foliot mechanism, which was low in both precision and accuracy due to the sensitivity of frictional losses in the system. The pendulum and Huygens’ introduction of the Theory of Involutes is shown to be a mechanism with a linear relationship to frictional losses in the system, instead of the non-linear relationship between frictional losses in verge-foliot mechanisms. The isochrone nature of vibrations of the pendulum are discussed in contrast to the variance in oscillation seen in verge-foliots. The introduction of the pendulum resulted in an improvement of …

Design And Development Of A 7 Dof Robot With Ergonomic Shoulder For Upper Limb Rehabilitation, Md Rasedul Islam

Theses and Dissertations

With the increase of stroke patients, the number of upper limb dysfunction is increasing day by day. Robotic intervention in upper limb (UL) rehabilitation of post-stroke patients has gained much traction in recent years. Though many research groups have developed exoskeletons, existing exoskeletons have limitations in both hardware design and control approaches. In most cases, rehabilitative robotic devices have not considered the movement of the shoulder joint’s center (center of glenohumeral joint); however, this movement leads to misalignment between human joints and robot joints, which is undesirable in any circumstances. To ensure better human-robot interaction (HRI), allowing mobility of shoulder …

Designing And Investigating A Novel Biodegradable-Nontoxic Mg-Mn-Zn-Na-K Alloying System, Murtatha Mohammed Jamel

Theses and Dissertations

Magnesium has been studied extensively due to the promising potential of using magnesium alloys in different applications, especially for biomedical implantation devices and other medical applications. This growing interest is due to the abundance of magnesium metal in the Earth's crust, as well as the fact that magnesium is 37% less dense than aluminum, has good mechanical properties, and is a nontoxic element with good biocompatibility. However, most Mg-based alloys contain alloying elements that are added to improve the mechanical properties but have toxic characteristics. At the same time a number of these alloys are still used in medical applications. …

Investigation Of Co-Pyrolysis And Co-Gasification Of Chicken Manure And Rice Husk, Juan Camilo Espindola Canon

Theses and Dissertations

Renewable energy is gaining more attention to supply the increasing energy demand worldwide. Currently, biomass is gaining popularity because this energy source offers several flexibilities in terms of the products that can be obtained out of the biomass (such as petroleum-like fuels, hydrogen, fertilizer, and solid fuels). There are different technologies to obtain the desired products out of the biomass (such as biological, physical, and thermochemical conversions). Among the thermochemical technologies, pyrolysis and gasification have the advantages of being faster, cleaner and produce more valuable fuels than the other technologies. However, gasification and pyrolysis technologies are expensive and very sensitive …

Development Of An Advanced Zinc Air Flow Battery System (Phase 2), Jingyu Si

Theses and Dissertations

A zinc-air battery is the promising energy storage technology for large-scale energy storage applications due to its low cost, environmental friendliness, and high energy density. However, the electrically rechargeable zinc−air batteries suffer from poor energy efficiency and cycle life because of critical problems such as passivation, dendrite growth, and hydrogen evolution reaction. The proliferation of zinc−air batteries is limited.

The zinc-air flow battery combines the advantages of both a zinc-air battery and a redox flow battery. This combination permits the zinc-air flow battery to compete with the current leading battery technologies in the marketplace. A rechargeable Zn-air flow battery with …

Investigation Of Heat Transfer In Stationary And Rotating U-Duct Passage Representing Internal Cooling Of Gas Turbine Blade Channel, Mandana Sheikhzad Saravani

Theses and Dissertations

Gas turbines are used in various systems, including in power plants, marine, and aircraft propulsion engines. The airflow in gas turbines can reach temperatures as high as 2000 K that exceeds the softening points for most high-performance blade materials, such as special steels, titanium alloys, and super-alloys. Preventing thermal failure in the turbine-blades has driven many technological advances in materials science and mechanical design. In this thesis, the main focus is on improving the performance of the internal cooling channel technology. In this study, the optimized thermal behavior of the coolant gas and surfaces in turbines by incorporating novel internal …

A Parametric Approach To Performative-Based Design, Case Study: Earth Tube Ventilation, Hoda Barzegar Ganji

Theses and Dissertations

As integrated design becomes more prevalent, new workflows develop in the architectural industry. Rather than the traditional sequential pattern, the knowledge is now being applied in parallel. That is, unlike the old baton passing, the players including the architect, the engineer, the consultant, the contractor, etc. play their role simultaneously. To achieve this, an architectural ecosystem needs a compatible digital information exchange approach; an approach that involves the engineer in the strategic design of systems, increases the chances of more creative, more integrated and higher-performing systems.

There are some problems in the current parametric studies such as lack of inclusivity …

Development And Control Of A 3-Dof Exoskeleton Robot For Forearm And Wrist Rehabilitation, Tanvir Ahmed

Theses and Dissertations

The research conducted under this project directly contributes to the development of a forearm and wrist rehabilitation robot (UWM-FWRR). Upper extremity impairment following stroke, trauma, sports injuries, occupational injuries, spinal cord injuries, and orthopaedic injuries results in significant deficits in hand manipulation and the performance of everyday tasks. Strokes affect nearly 800,000 people in the United States each year. Rehabilitation programs are the main method of promoting functional recovery in individuals with finger impairment. The conventional therapeutic approach requiring a long commitment by both the clinician and the patient. Robotic devices (RDs) are novel and rapidly expanding technologies in hand …

Numerical And Experimental Investigation Of Performance For Very-Low-Head Micro And Pico Kaplan Hydro-Turbines With Rim-Driven Generators, Ahmad Ibrahim Mohammad Abbas

Theses and Dissertations

Renewable energy plays a significant role in new power generation worldwide, and hydropower is contributing to 86% of renewable electricity production within all other renewable energy resources. Simultaneously, hydropower shares 83% of U.S. renewable energy capacity and accounts for 77% of actual renewable electricity generation. However, most of the installed hydropower consists of large plants. Much potential hydro generation remains untapped, particularly at lower power and head levels. There is a substantial opportunity worldwide and across the U.S. in specific to add new hydropower generating capabilities at low-head sites such as non-powered dams, canals, and conduits with a water height …