Matching Items (33)

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Handheld IR Spectrometer

Description

Emission Spectroscopy is a powerful tool for the identification of mineralogical samples and has been used for decades in labs to study the geology of Earth and Mars. However, the instruments needed to make these measurements are large, expensive and

Emission Spectroscopy is a powerful tool for the identification of mineralogical samples and has been used for decades in labs to study the geology of Earth and Mars. However, the instruments needed to make these measurements are large, expensive and sensitive pieces of equipment that are too cumbersome to use in the field. There are some commercial products that attempt to work in the field, however they perform this task poorly, often resulting in limited applications, poor performance or not being truly portable. My thesis utilizes the TES family of planetary instruments as a source of inspiration for creating a truly portable Fourier Transform InfraRed spectrometer. From this initial design phase, it appears that it is possible to build an instrument with vastly improved capabilities over the current systems on the market. This roughly 12 inch by 7 inch by 8 inch device with a 3-inch diameter telescope is capable of achieving a SNR of over 1000 during a 5 minute scan of a sample allowing for 5 sigma (99.99994% Confidence) identification of 1% spectral features from 5 um to >60 um making this instrument a one of a kind device with high application potential, not only for field geologist but for the future of manned exploration of space. Currently an accurate measurement of costs is not available, however with more development and optimization a total cost of around $50K is feasible while still maintaining the same performance characteristics. If the costs can fall within an acceptable range, this device will not only be technically impressible but viable from a financial standpoint as well.

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Date Created
2019-05

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A Survey of Modern Gridded Ion Propulsion Systems and Their Development and Applications in Future Space Missions

Description

This paper studies the history and development of ion propulsion systems and survey past, present, and developing technology with their applications to space missions. This analysis addresses the physical design parameters and process that is a part of designing and

This paper studies the history and development of ion propulsion systems and survey past, present, and developing technology with their applications to space missions. This analysis addresses the physical design parameters and process that is a part of designing and optimizing a gridded ion thruster. It also identifies operational limits that may be associated with solar-powered ion propulsion systems and posits plausible solutions or alternatives to remedy such limitations. These topics are presented with the intent of reviewing how ion propulsion technology evolved in its journey to develop to today's systems, and to facilitate thought and discussion on where further development of ion propulsion systems can be directed.

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Date Created
2018-05

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Physical Landscapes as Living Memories: A Case Study of Belgrade, Sarajevo, and Zagreb

Description

Buildings and monuments serve as a communal declaration of identity and as the physical landscape upon which memories are inscribed. Through its ability to concrete identity and capacity to reconstruct the narratives of the past, public spaces and places have

Buildings and monuments serve as a communal declaration of identity and as the physical landscape upon which memories are inscribed. Through its ability to concrete identity and capacity to reconstruct the narratives of the past, public spaces and places have the structure of memory and serve as a fundamental aspect of cultural memory from which groups derive their identities. Beyond the social function of communal spaces, as a spatial claim architecture is a political expression of the territorial imperatives of the state. Consequently, both the political and social significance of physical spaces/places lead to the direct targeting of buildings, landscapes, and recognizable monuments in the processes of war.
As evidenced by the 1991-5 War in Bosnia, Croatia, and Serbia, culturally-relevant and internationally recognizable symbols of culture, like Stari Most in Bosnia and the Old Town of Dubrovnik, were destroyed with the purpose of manipulating the physical memories of the communities, thereby directly affecting the cultural identities of the communities residing there. As it stands, scholarship on the subject of memory in post-war areas has failed to consider the effects of space/place on memory, consequently failing to provide a viable theoretical framework to explain the interplay of space/place, memory, and identity. This paper is an effort to connect the current scholarship on memory, its function and effects on identity, with the realities of the physical environment in Bosnia, Croatia, and Serbia and their function of imposed confrontation, and thus recollection, of the War. The purpose of my thesis is to put city landscapes (private, uncrated memories) and museum narratives (public, curated memories) in communication to demonstrate how influential a factor space/place is in determining collective memory in a Balkan context. Cultural memory is at once incredibly vulnerable to reconstruction and massively determinate of group identity, thereby necessitating a deeper understanding of its determinant factors and the present uses of such factors.

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Date Created
2020-05

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The Future of Space with Respect to International Relations

Description

The emergence of the space industry facilitated new technologies which completely changed how humans live. However, the industry itself has also acted as a constant source of conflict between its participants. As a result, the industry has encountered issues regarding

The emergence of the space industry facilitated new technologies which completely changed how humans live. However, the industry itself has also acted as a constant source of conflict between its participants. As a result, the industry has encountered issues regarding the role of private industry in space development, the militarization of space, how to address the gap in space technology between developed and underdeveloped nations, and the overall economic climate of space. With these numerous challenges facing the space industry, this investigation hopes to present potential solutions to said issues while providing a baseline for future research. In order to accomplish this, the international relations ideologies of neorealism, neoliberalism and constructivism were applied in conjunction with opinions from multiple industry scholars to synthesize potential solutions and provide a knowledge baseline and methodology for future investigations. This resulted in the conclusion that, in the scope of this investigation, a constructivist solution focusing on human nature's role in international relations is the best means of avoiding global conflict while promoting prosperity. The proposed constructivist solution proposes the development of multi-actor groups which defend, maintain and develop space assets collectively. These groups formed around ideological similarities would effectively limit conflict and increase the viability of space. However, this constructivist approach is not satisfactory due to its complexity which could result in the breakdown of peace and prosperity if interdependence between actors cannot be maintained. As a result, more research is necessary to develop an appropriate solution but, the methodology, information and understanding of different international relations principles used in this thesis can be used in future investigations to develop more comprehensive solutions.

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Created

Date Created
2017-05

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The Development of a Power System for the Phoenix CubeSat

Description

The Phoenix CubeSat is a 3U Earth imaging CubeSat which will take infrared (IR) photos of cities in the United Stated to study the Urban Heat Island Effect, (UHI) from low earth orbit (LEO). It has many different components that

The Phoenix CubeSat is a 3U Earth imaging CubeSat which will take infrared (IR) photos of cities in the United Stated to study the Urban Heat Island Effect, (UHI) from low earth orbit (LEO). It has many different components that need to be powered during the life of its mission. The only power source during the mission will be its solar panels. It is difficult to calculate power generation from solar panels by hand because of the different orientations the satellite will be positioned in during orbit; therefore, simulation will be used to produce power generation data. Knowing how much power is generated is integral to balancing the power budget, confirming whether there is enough power for all the components, and knowing whether there will be enough power in the batteries during eclipse. This data will be used to create an optimal design for the Phoenix CubeSat to accomplish its mission.

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Date Created
2017-05

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Hopping Mobility Mechanism for Robotic Exploration of Lunar Lava Pits

Description

A robotic exploration mission that would enter a lunar pit to characterize the environment is described. A hopping mechanism for the robot's mobility is proposed. Various methods of hopping drawn from research literature are discussed in detail. The feasibilities of

A robotic exploration mission that would enter a lunar pit to characterize the environment is described. A hopping mechanism for the robot's mobility is proposed. Various methods of hopping drawn from research literature are discussed in detail. The feasibilities of mechanical, electric, fluid, and combustive methods are analyzed. Computer simulations show the mitigation of the risk of complex autonomous navigation systems. A mechanical hopping mechanism is designed to hop in Earth gravity and carry a payload half its mass. A physical experiment is completed and proves a need for further refinement of the prototype design. Future work is suggested to continue exploring hopping as a mobility method for the lunar robot.

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Created

Date Created
2015-05

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The Space Between Us

Description

Abstract The Space Between Us is a poetic project about the grieving process. Formally, the piece is seven sections of prose couched within a crown of seven sonnets. The first-person sections of prose allow for personal discussion in the confessional

Abstract The Space Between Us is a poetic project about the grieving process. Formally, the piece is seven sections of prose couched within a crown of seven sonnets. The first-person sections of prose allow for personal discussion in the confessional tradition of my own lived experience of grief, while the sonnets are a fictional conversation between David Bowie and Stephen Hawking in 1973. The claim of this piece is that death creates space. When a loved one passes away, what we inherit is a gap. What is the role of this gap in the world? How do we interact with it, see it, interpret it, or touch it? Can we put our hands on its form? Can we put it into words? And if the exploration of this space does lead us to words, should they be shared? The round form of the sonnet crown echoes the cyclical motion of questioning, and its allegorical themes: grieving as a black hole, the boundaries of language, the subjectivity of conversation, the limits of space, the dehumanization of obsession, the space between you and who you are perceived to be, and the clash between artistic desires and scientific discoveries.

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Date Created
2015-05

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The Evolving Frontier: Comparing the Historical Dynamics of Private Enterprise in Earth and Space Exploration

Description

Guided by the Obama administration, NASA has begun developing commercial launch capabilities. For both cargo and crew delivery to the International Space Station, NASA has selected companies to build and operate the vehicles at a fixed price. Alexander McDonald suggests

Guided by the Obama administration, NASA has begun developing commercial launch capabilities. For both cargo and crew delivery to the International Space Station, NASA has selected companies to build and operate the vehicles at a fixed price. Alexander McDonald suggests that this continues a trend in space exploration established by large observatory projects, and that the Apollo-era style of funding and operation was a historical anomaly. This paper attempts to discover if historical analog can support or weaken this thesis. The analogs chosen are two episodes in the history of terrestrial exploration: the experience of the Spanish and British empires in North America. These are compared to the history of space exploration up until today, focusing on how the role of private enterprise has changed in each instance. While the analogies between historical episodes are weak in a few areas, they do possess a common narrative concerning the shifting balance between private and government interests. This narrative supports McDonald's thesis, and shows that NASA's current policy anticipates an expected transition towards a private-public hybrid model of exploration and expansion.

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Date Created
2015-05

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High Efficiency Electronics for Space Applications

Description

The Metal Semiconductor Field Effect Transistor (MESFET) has high potential to enter analog and RF applications due to their high breakdown voltage and switching frequency characteristics. These MESFET devices could allow for high voltage analog circuits to be integrated with

The Metal Semiconductor Field Effect Transistor (MESFET) has high potential to enter analog and RF applications due to their high breakdown voltage and switching frequency characteristics. These MESFET devices could allow for high voltage analog circuits to be integrated with low voltage digital circuits on a single chip in an extremely cost effective way. Higher integration leads to electronics with increased functionality and a smaller finished product. The MESFETs are designed in-house by the research group led by Dr. Trevor Thornton. The layouts are then sent to multi-project wafer (MPW) integrated circuit foundry companies, such as the Metal Oxide Semiconductor Implementation Service (MOSIS) to be fabricated. Once returned, the electrical characteristics of the devices are measured. The MESFET has been implemented in various applications by the research group, including the low dropout linear regulator (LDO) and RF power amplifier. An advantage of the MESFET is that it can function in extreme environments such as space, allowing for complex electrical systems to continue functioning properly where traditional transistors would fail.

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Date Created
2015-05

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The Past, Present, and Future of NASA Research into Microbes in Space

Description

Space microbiology, or the study of microorganisms in space, has significant applications for both human spaceflight and Earth-based medicine. This thesis traces the evolution of the field of space microbiology since its creation in 1935. Beginning with simple studies to

Space microbiology, or the study of microorganisms in space, has significant applications for both human spaceflight and Earth-based medicine. This thesis traces the evolution of the field of space microbiology since its creation in 1935. Beginning with simple studies to determine if terrestrial life could survive spaceflight, the field of space microbiology has grown to encompass a substantial body of work that is now recognized as an essential component of NASA' research endeavors. Part one provides an overview of the early period of space microbiology, from high-altitude balloon and rocket studies to work conducted during the Apollo program. Part two summarizes the current state of the field, with a specific focus on the revolutionary contributions made by the Nickerson lab at the Biodesign Institute at ASU using the NASA-designed Rotating Wall Vessel (RWV) Bioreactor. Finally, part three highlights the research I've conducted in the Nickerson lab, as well as continuing studies within the field of space microbiology.

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Date Created
2016-05