Advanced space system concepts and their orbital support needs (1980 - 2000). Volume 3: Detailed data. Part 1: Catalog of initiatives, functional options, and future environments and goals

The following areas were discussed in relation to a study of the commonality of space vehicle applications to future national needs: (1) index of initiatives (civilian observation, communication, support), brief illustrated description of each initiative, time periods (from 1980 to 2000+) for implementation of these initiatives; (2) data bank of functional system options, presented in the form of data sheets, one for each of the major functions, with the system option for near-term, midterm, and far-term space projects applicable to each subcategory of functions to be fulfilled; (3) table relating initiatives and desired goals (public service and humanistic, materialistic, scientific and intellectual); and (4) data on size, weight and cost estimations

Swarming Reconnaissance Using Unmanned Aerial Vehicles in a Parallel Discrete Event Simulation

Current military affairs indicate that future military warfare requires safer, more accurate, and more fault-tolerant weapons systems. Unmanned Aerial Vehicles (UAV) are one answer to this military requirement. Technology in the UAV arena is moving toward smaller and more capable systems and is becoming available at a fraction of the cost. Exploiting the advances in these miniaturized flying vehicles is the aim of this research. How are the UAVs employed for the future military? The concept of operations for a micro-UAV system is adopted from nature from the appearance of flocking birds, movement of a school of fish, and swarming bees among others. All of these natural phenomena have a common thread: a global action resulting from many small individual actions. This emergent behavior is the aggregate result of many simple interactions occurring within the flock, school, or swarm. In a similar manner, a more robust weapon system uses emergent behavior resulting in no weakest link because the system itself is made up of simple interactions by hundreds or thousands of homogeneous UAVs. The global system in this research is referred to as a swarm. Losing one or a few individual unmanned vehicles would not dramatically impact the swarms ability to complete the mission or cause harm to any human operator. Swarming reconnaissance is the emergent behavior of swarms to perform a reconnaissance operation. An in-depth look at the design of a reconnaissance swarming mission is studied. A taxonomy of passive reconnaissance applications is developed to address feasibility. Evaluation of algorithms for swarm movement, communication, sensor input/analysis, targeting, and network topology result in priorities of each model\u27s desired features. After a thorough selection process of available implementations, a subset of those models are integrated and built upon resulting in a simulation that explores the innovations of swarming UAVs

An Algebraic Approach to Nivat's Conjecture

This thesis introduces a new, algebraic method to study multidimensional configurations, also sometimes called words, which have low pattern complexity. This is the setting of several open problems, most notably Nivat’s conjecture, which is a generalization of Morse-Hedlund theorem to two dimensions, and the periodic tiling problem by Lagarias and Wang. We represent configurations as formal power series over d variables where d is the dimension. This allows us to study the ideal of polynomial annihilators of the series. In the two-dimensional case we give a detailed description of the ideal, which can be applied to obtain partial results on the aforementioned combinatorial problems. In particular, we show that configurations of low complexity can be decomposed into sums of periodic configurations. In the two-dimensional case, one such decomposition can be described in terms of the annihilator ideal. We apply this knowledge to obtain the main result of this thesis – an asymptotic version of Nivat’s conjecture. We also prove Nivat’s conjecture for configurations which are sums of two periodic ones, and as a corollary reprove the main result of Cyr and Kra from [CK15].Algebrallinen lähestymistapa Nivat’n konjektuuriin Tässä väitöskirjassa esitetään uusi, algebrallinen lähestymistapa moniulotteisiin,matalan kompleksisuuden konfiguraatioihin. Näistä konfiguraatioista, joita moniulotteisiksi sanoiksikin kutsutaan, on esitetty useita avoimia ongelmia. Tärkeimpinä näistä ovat Nivat’n konjektuuri, joka on Morsen-Hedlundin lauseen kaksiulotteinen yleistys, sekä Lagariaksen ja Wangin jaksollinen tiilitysongelma. Väitöskirjan lähestymistavassa d-ulotteiset konfiguraatiot esitetään d:n muuttujan formaaleina potenssisarjoina. Tämä mahdollistaa konfiguraation polynomiannihilaattoreiden ihanteen tutkimisen. Väitöskirjassa selvitetään kaksiulotteisessa tapauksessa ihanteen rakenne tarkasti. Tätä hyödyntämällä saadaan uusia, osittaisia tuloksia koskien edellä mainittuja kombinatorisia ongelmia. Tarkemmin sanottuna väitöskirjassa todistetaan, että matalan kompleksisuuden konfiguraatiot voidaan hajottaa jaksollisten konfiguraatioiden summaksi. Kaksiulotteisessa tapauksessa eräs tällainen hajotelma saadaan annihilaattori-ihanteesta. Tämän avulla todistetaan asymptoottinen versio Nivat’n konjektuurista. Lisäksi osoitetaan Nivat’n konjektuuri oikeaksi konfiguraatioille, jotka ovat kahden jaksollisen konfiguraation summia, ja tämän seurauksena saadaan uusi todistus Cyrin ja Kran artikkelin [CK15] päätulokselle

Birthing pains: How cyborgs refigure medical bodies, technologies, and objectives

Cyborgs are polymorphic and not yet visibly different from humans in part because cyborgic technologies have just been developed, in part because we are not trained to see how the post human arises. The birth of cyborgs alters the core of medicine from disease-containment and death-assessment to enhancement of function and image, to transgression of previous natural bounds as established by the possibility of space and oceanic travel. Cyborgs, as postmodern/ posthuman products of medicine, make visible the current shift in the construction of medical bodies, technologies, and objectives. Medical bodies have been determined by a conception of patienthood or diseased body. The connection of body and disease as distinct species happened in the medical enclosure: the hospital-clinic, during mid-late 19th century. In the hospital-clinic, the medical body has been clearly mapped in terms of disease identity or malfunction, and it has encountered medical technologies used to aid in diagnosis. The patient-doctor relationship has shifted because of the revolution in instrumentation at the turn of the century. Another shift can be discerned, as it is again mirrored in the relations of doctor-patient, as it has been re-structured through cyberspace and expert systems. Clearly, the revolution or scientification of medicine has been fueled by the tuberculosis crisis as it challenged medical and political institutions. A similar crisis has occurred with AIDS: is cyborg-technology the fulfillment of the modem dream of immortality and total control in the face of the epidemic? An easy answer to such question cannot be produced. Cyborgs are a product of the meeting of natural and human sciences through cybernetics. Their existence and proliferation destabilize assumptions at the philosophical foundations of knowledge and medicine as well as our conceptions of identity and rights, through an unsettling of the connection between community-individuality, of the distinction between private and public domains

“Jazz Steel”: An Ethnography of Race, Sound, and Technology in Spaces of Live Performance

This dissertation uses multi-sited ethnography to explore how the technological manipulation of sound in live jazz performance conditions the meanings, feelings, and politics of racial difference. Situated primarily in two multi-room jazz venues, Jazz at Lincoln Center (JALC) and the Montreux Jazz Festival, I analyze three years of participant observation with musicians, audio technicians, acousticians, and sound system designers. I analyze four main categories of technology: (1) physical acoustics; (2) sound isolation, (3) sound reinforcement (amplification); and (4) digital measurement, prediction, and manipulation technologies. My overarching goal is to provide new ways to understand live performance with more attention to the technologies, architectural designs, and human labor crucial to any sonic event. I show not only how the built physical spaces and technologies I observed are inscribed with human judgments about music and sound, but how the spaces themselves exhibit their own agentive force in conditioning social behavior. I thus rethink live performance as a dynamic network of materials, technologies, and human and nonhuman practices and meanings. My second intervention uses the figure of jazz—and, more specifically, the sound of jazz—to investigate how the intersection of technology and sound exposes new ways to think through questions of human difference. Focusing primarily on race, I show how ideals of scientific objectivity and “pure and clean” aesthetics challenge racial tropes of Black sound as “noisy” or disordered while complicating jazz’s political force as an agent of oppositional energy and Black cultural distinctiveness. Chapter one, “‘Some Rooms Make You Shout’: Physical Acoustics and the Sound of Jazz,” shows how the designers of JALC’s Rose Theater, a prestigious 1,300-seat concert hall, acoustically encoded musical and social values into the physical materials of the room and the building that surrounds it. Namely, I show how particular aspects of the hall’s physical acoustics reveal overlapping investments in western aesthetic values and Afro-diasporic priorities, including call and response, participatory interaction, and heterogenous timbral palettes. Chapter two, “‘Some Rooms Make You Whisper’: The Art of Isolation and the Racial Politics of Quiet,” focuses on Rose Theater’s acoustic isolation, accomplished through a rare and expensive “box-in-box” construction that physically disconnects the hall from any vibratory connection with the outside world. This unique architecture fosters an uncannily quiet, sequestered aural environment that counters a range of histories of racist white listening that associate Blackness, Black bodies, and Black spaces with various forms of “noisy” sonic excess. The hall’s extraordinary quietness also reinforces a culture of attentive listening that enmeshes the sound of jazz with western ontologies of aesthetic musical autonomy. Relatedly, chapter three, “‘Make Yourselves Invisible’: Transparency, Fidelity, and the Illusion of Natural Sound,” demonstrates how ideals of fidelity and transparency are embedded within electroacoustic sound systems, and how my interlocutors design and operate such systems to foster a “pure and clean” aural environment. I show how my interlocutors aspire to an illusion of a “natural,” technology-free sonic experience but deploy an array of technological systems to do it. My analysis challenges traditional notions of fidelity—and sonic mediation itself—by revealing musical experience as a constellation of vibrant interactions between acoustic vibrations, amplified sound energy, and physical human bodies. Chapter four, “Tuning the Room: On the ‘Arts’ and ‘Sciences’ of Sound and Space,” analyzes how my interlocutors design and calibrate sound systems using state-of-the-art digital equipment to foster what they call a neutral, “colorless” sonic environment with “the same sound everywhere.” This process of “tuning the room” conjures novel ontologies of sound and space as objects of detached observation and technoscientific manipulation. In chapter five, “Black Boxes, Pink Noise, and White Listening: Rationalizing Race, Gender and Jazz,” I demonstrate how the objectification of sound and space is entangled with raced and gendered epistemologies of scientific knowledge production. I further analyze these approaches to sound and space for their underlying entanglements with what Lipsitz calls a “white spatial imaginary”: an ostensibly neutral environment conducive to discriminatory systems of capital accumulation. These and other entanglements complicate the oppositional, counter-hegemonic potential of jazz and other forms of Black performance