Matching Items (311)

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Brine Stability at Recurring Slope Lineae in Valles Marineris, Mars

Description

Recurring Slope Lineae (RSL) are dark, narrow features which form on steep Martian slopes during warm seasons, lengthening, fade in cold seasons and recurring annually. There are many hypotheses on

Recurring Slope Lineae (RSL) are dark, narrow features which form on steep Martian slopes during warm seasons, lengthening, fade in cold seasons and recurring annually. There are many hypotheses on the formation mechanism of RSL. A number of these hypotheses suggest that RSL are liquid brines flowing on the surface. Brine based hypotheses often state that sub-surface aquifers are necessary to supply the water needed to recharge RSL. One problem with this is that RSL are observed forming on isolated peaks and ridgelines where a sub-surface aquifer is unlikely. This study uses a thermal model called KRC to examine the correlation between RSL activity and surface temperature at several RSL sites in Valles Marineris. This correlation is compared to the freezing temperature of several brines. Results show an interesting relationship between RSL activity and the surface temperature of very steep (> 60º) slopes. This could indicate that RSL are caused by thermal stresses loosening material on the face of bedrock outcroppings instead of briny flows.

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  • 2019-05

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MULTIPLE DEGREE OF FREEDOM PROSTHETIC ELBOW JOINT: DESIGN OF A PROSTHETIC ELBOW JOINT WITH FLUID JOINT MEMBRANE SAC TO ENABLE MORE FLUID ROTATIONAL MOVEMENT

Description

Current prosthetic designs have limitations with properly representing the full range of motion that a human elbow provides. The structure of the biological elbow was analyzed to assess how it

Current prosthetic designs have limitations with properly representing the full range of motion that a human elbow provides. The structure of the biological elbow was analyzed to assess how it produces the flexion/extension and pronation/supination movement. The humerus and ulna have a hinge joint relationship, the humerus acts as a concave cylinder and the ulna acts as a convex cylinder, and the radius and ulna have a pivot joint relationship, the radius rotates around the ulna on a single axis. The joint cavity is responsible for flexion/extension and pronation/supination and also provides lubrication and strength of the elbow joint. A new design of a prosthetic elbow joint was created to mimic human elbow movements. The design uses a ball-and-socket socket joint that allows for flexion/extension and pronation/supination movement while incorporating a hydrogel lining to provide lubrication and restriction of pronation/supination to not go beyond human capacity. This joint was designed to be assembled from the back to the front; the socket has a cap on the outside that would allow for the ball to be inserted inside the socket and the cap be placed onto the socket. Once the final design and assembly process was completed, analysis of the design was performed to determine whether the design would be functional and reliable. The analysis concluded that the design and the material chosen for the design would not result in fracture and would also result in a large factor of safety, thus indicating that the prosthetic joint would not be easily damaged. Further research and development of this prosthetic elbow joint could be performed to allow it to be interchangeable with hinge joints that are currently used. Future work will include further research on the hydrogel lubricant, further analysis of the design and possible design modifications to allow for use in current practices and to account for the weak points in the current design. In summary, a successful redesign of the elbow joint prosthetic that provides low friction flexion/extension as well as pronation/supination movement will better serve the needs of individuals with amputation.

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  • 2019-05

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Worksite Wellness and Its Impact on Mental Health

Description

The overall goal of this paper is to promote wellness, exercise and positive mental health. To encourage this goal, insight on the benefits of worksite wellness programs will be provided.

The overall goal of this paper is to promote wellness, exercise and positive mental health. To encourage this goal, insight on the benefits of worksite wellness programs will be provided. Current worksite wellness programs focus minimally on the mental health benefits of exercise. Instead they focus on physiological results that come with worksite wellness programs. Exercise can provide both physiological and psychological health benefits (Ramirez & Wipfli, 2012). There should be more emphasis on mental health benefits of worksite wellness programs to provide positive mental health benefits in the workplace.
There are many different types of worksite wellness programs such as group fitness, on-site facilities and health allowances. It is important to vary wellness activities due to individuals having different fitness and health motivation. This implementation can become costly and require resources and support that many companies do not want to provide without successful results. Focusing on the psychological health benefits to such programs will allow companies to recognize the increase in productivity and positive work environment that result in worksite wellness programs. This will allow not only employees to benefit from the implementation of such programs but also the succession of the company.
This paper will explore ways to seek future enhancements within worksite wellness programs. Individuals will be given ways to positively contribute to work environments while maintaining healthy lifestyles. Companies will also better understand the importance that top recruits in the industry see within these types of programs. Through worksite wellness programs, employees will be provided with the tools necessary to improve their physical and mental health, while companies will have a more positive work environment as a result.

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Date Created
  • 2019-05

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The Water Loss and Solar Panel Operating Condition Effects of Using Solar Photovoltaic Panels to Shade a Body of Water

Description

Ensuring that people across the globe have enough water and electricity are two large issues that continue to grow. This study performs a test on whether using solar photovoltaic

Ensuring that people across the globe have enough water and electricity are two large issues that continue to grow. This study performs a test on whether using solar photovoltaic modules to shade water can potentially help diminish the issues of water and power. Using the setup of a PV module shading water, a stand-alone PV module, and unshaded water, it was found that shading water can reduce evaporation and lower PV module operating temperature at the same time. Using averaged data from two days of testing, the volume per unit surface area of water that evaporated per hour was 0.319 cm3/cm2 less for the shaded water compared to the unshaded water. The evaporation rates found in the experiment are compared to those of Lake Mead to see the amount of water lost on a large scale. For the operating temperature of the PV module, the module used for shading had a consistently lower temperature than the stand-alone module. On the first day, the shading module had an average temperature 5.1 C lower than the stand-alone module average temperature. On day two, the shading module had an average temperature 3.4 C lower than the stand-alone module average temperature. Using average temperatures between the two days from 10:30am and 4:45pm, the average daily temperature of the panel used for shading was 4.5C less than the temperature of the stand-alone panel. These results prove water shading by solar PV modules to be effective in reducing evaporation and lowering module operating temperature. Last, suggestions for future studies are discussed, such as performance analysis of the PV modules in this setting, economic analysis of using PV modules as shading, and the isolation of the different factors of evaporation (temperature, wind speed, and humidity).

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Date Created
  • 2019-05

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The Past, Present, and Future of Cryptocurrency

Description

This thesis examines the usefulness of cryptocurrency and provides a research-backed conclusion on the future of this digital currency. This starts with a look into the history of fiat moneys:

This thesis examines the usefulness of cryptocurrency and provides a research-backed conclusion on the future of this digital currency. This starts with a look into the history of fiat moneys: how they were originally created, how they were implemented in past governments, and the resulting interactions between the currency and its users. The countries that were chosen for exploration demonstrate a few common trends throughout their execution of fiat currency. It is through the relationships dating all the way back to the Ancient Romans to the recent problems in Venezuela that provide a well-rounded scope of the issues. However, there have also been a few instances in which fiat currency has been successfully integrated, which furthers the advocacy towards an eventual implementation of government-regulated cryptocurrency.
This leads into an examination on the history of one cryptocurrency in particular, Bitcoin. This analysis includes the effects of the cryptomarket and the impact that it has had on various economies. Additionally, the blockchain is explored by first defining what it is and then its potential and current uses not only in the cryptomarket industry, but others as well. This includes a focus on the real estate market as well as banking. Using knowledge gained about the history of fiat money, cryptocurrencies, and the usefulness of the blockchain, this thesis compares the history of fiat currencies with the current implementation of cryptocurrency. Furthermore, the pros and cons of the possible implementation of cryptocurrency helps to provide an outlook on whether it can eventually be government regulated.

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Date Created
  • 2019-05

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The atypical college experience for students with chronic illnesses

Description

With the advancement of modern technology, antibiotics and vaccinations have allowed humans to live longer. Deadly infections like strep throat and measles are now considered an inconvenience. The main reason

With the advancement of modern technology, antibiotics and vaccinations have allowed humans to live longer. Deadly infections like strep throat and measles are now considered an inconvenience. The main reason for this phenomenon is the medical revolution of the 20th century. Although Alexander Fleming discovered penicillin in 1929, the full potential of antibiotics was not recognized until the 1940’s. This decade marked the commercialization of penicillin and opened possibilities for new classes of medications like corticosteroids. By the 21st century, pharmaceutical companies perfected the craft of antibiotics and designed them to treat specific infections. Consequently, as humans live longer, chronic illness has become more prevalent in contemporary society. According to the World Health Organization (WHO), chronic diseases are the “leading cause of mortality in the world representing 60% of all deaths”. Contrary to popular opinion, chronic diseases are more prevalent in developed nations such as Europe and America. By 2025, it is estimated that nearly half of the American population (49%) “will be affected by a chronic disease”.
My personal experience with chronic illness served as inspiration for my thesis. At the age of five, I was diagnosed with severe asthma. The following year, I was hospitalized with pneumonia for nearly a month. Despite my health issues, I had a supportive family and grew up relatively well. During my freshman year of college, I hardly experienced any respiratory or allergy problems. Unfortunately, this time period was very short-lived. Due to rapid expansion, the natural flora and fauna of the desert has changed significantly within the last decade. Throughout the remainder of my undergraduate experience, I had a series of respiratory relapses that resulted in numerous medical withdrawals. In addition to health problems, I discovered the college environment poses unique challenges for students with chronic illnesses. Ultimately, this led me to delve deeper into this topic for my thesis.

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Date Created
  • 2019-05

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Ciel, Smart Vent Solutions

Description

This product was completed under the guidance of LG Electronics and the InnovationSpace team. This report describes the development of a revolutionized idea for smart ventilation referred to as Ciel.

This product was completed under the guidance of LG Electronics and the InnovationSpace team. This report describes the development of a revolutionized idea for smart ventilation referred to as Ciel. Ciel is a smart home comfort device that provides the user with a smart, energy efficient, and easy-to-use way to regulate the room temperature of their home. The planning documentation, problem comprehension, design, functionality, and device specifications are outlined and illustrated within this report. And the discussion and analysis look into the benefits of the technology, outline the prototyping plan and process, look into the materials necessary for construction, and production safety considerations.

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  • 2019-05

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Design and Simulation of Controllers for Multi-Robot Transport over Inclines

Description

The goal of this thesis is designing controllers for swarm robots transport a payload over inclines. Several fields of study are related to this study, including control theory, dynamic modeling

The goal of this thesis is designing controllers for swarm robots transport a payload over inclines. Several fields of study are related to this study, including control theory, dynamic modeling and programming. MATLAB, a tool of design controller and simulation, is used in this thesis.

To achieve this goal, a model of swarm robots transportation should be designed, which is cruise control for this scenario. Secondly, based on free body diagram, force equilibrium equation can be deduced. Then, the function of plant can be deduced based on cruise control and force equilibrium equations. Thirdly, list potential controllers, which may implement desired controls of swarm robots, and test their performance. Modify value of gains and do simulations of these controller. After analyzing results of simulation, the best controller can be selected.

In the last section, there is conclusion of entire thesis project and pointing out future work. The section of future work will mention potential difficulties of building entire control system, which allow swarm robots transport over inclines in real environment.

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  • 2019-05

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Analysis of Radiation Shielding for Spacecraft

Description

The intention of this report is to use computer simulations to investigate the viability of two materials, water and polyethylene, as shielding against space radiation. First, this thesis discusses some

The intention of this report is to use computer simulations to investigate the viability of two materials, water and polyethylene, as shielding against space radiation. First, this thesis discusses some of the challenges facing future and current manned space missions as a result of galactic cosmic radiation, or GCR. The project then uses MULASSIS, a Geant4 based radiation simulation tool, to analyze the effectiveness of water and polyethylene based radiation shields against proton radiation with an initial energy of 1 GeV. This specific spectrum of radiation is selected because it a component of GCR that has been shown by previous literature to pose a significant threat to humans on board spacecraft. The analysis of each material indicated that both would have to be several meters thick to adequately protect crew against the simulated radiation over a several year mission. Additionally, an analysis of the mass of a simple spacecraft model with different shield thicknesses showed that the mass would increase significantly with internal space. Thus, using either material as a shield would be expensive as a result of the cost of lifting a large amount of mass into orbit.

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  • 2019-05

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Effect of Winglet Morphology on Variable Range Commercial Aircraft

Description

Winglets and wingtip structures have been prominent in commercial aircraft design in the past few decades. These designs are known to reduce the induced drag on an aircraft wing, thus

Winglets and wingtip structures have been prominent in commercial aircraft design in the past few decades. These designs are known to reduce the induced drag on an aircraft wing, thus increasing its overall fuel efficiency. Several different winglet designs exist, and little reason is offered as to why different winglet designs are used in practice on different aircraft, especially those of variable range. This research tests existing winglets (no winglet, raked winglet, flat plate winglet, blended winglet, and wingtip fence) on a span-constrained wing planform design both computationally and in the wind tunnel. While computational tests using a vortex lattice code indicate that the wingtip fence minimizes induced drag and maximizes lift to drag ratio in most cases, wind tunnel tests show that at different lift coefficients and angles of attack, the raked winglet and blended winglet optimize the aerodynamic efficiency at incompressible flow velocities. Applying the wing aerodynamic data to existing variable range commercial aircraft, mission performance analysis is run on a Bombardier CRJ200, Airbus A320, and Airbus A340-300. By comparing flight lift coefficients in cruise for these aircraft to the lift coefficients at which winglets minimize drag in compressible flows, optimal winglet designs are chosen. It is found that the short range CRJ200 is best equipped with a flat plate or blended winglet, the medium range A320 can reduce drag with either a wingtip fence, raked winglet, or blended winglet, and the long range A340 performs best with a flat plate, blended, or raked winglet. Overall, despite the discrepancy in winglet selection depending on which experimental results are used, it is clear that addition of a winglet to a span-constrained wing is beneficial in that it reduces induced drag and therefore increases overall fuel efficiency.

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  • 2017-05