Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 232 for “"ISM"”.
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Antenna design for 2.4 GHz ISM band
The utilization of 2.4 GHz ISM band has experienced enormous growth in the last 5 years. A lot of research has been conducted on the design of antennas operating inside this band. The limited space on the circuit board for the RF module imposes a limit on the physical size available for the …
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Supernova shrapnel: nearby supernovae and dust transport in the ISM
… presence of a magnetic field within the shocked ISM material will limit the passage of SN dust grains reflecting them or trapping within the heart of the SNR.
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ISM S-band CubeSat Radio Designed for the PolySat System Board
… the 2.45GHz Industrial, Scientific, and Medical (ISM) radio band.</p> <p>Estimating a link budget for a realistic CubeSat leads to the conclusion that this system will require a large deployable CubeSat antenna, large earth station satellite dish, and a fine-pointing attitude control system. Noise …
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Design and Prototyoing of a Wireless Data Transceiver in the 900MHz ISM Band
The Communications industry is currently involved in a wireless revolution. Consequently, there is a need for a wide variety of wireless solutions to replace existing wired systems. The major systems, such as cellular and satellite, are costly to put in place and require a low BER (bit error rate) …
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Visual Framing: A Study in Face-ism from the Websites for the 108th United States Congress.
… from 540 websites and coded using the face-ism index. Overall, the results supported the face-ism theory. Images of females were cropped lower on their bodies than images of males. The face-ism effect was not supported until the number of people in the photograph numbered six or more. …
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Towards the sustainable industrial development of Mars : comparing novel ISRU / ISM architectures using lifetime embodied energy
… result of reusable rockets, adoption of ISRU and ISM, and a new emphasis on developing permanent infrastructure on other worlds. This thesis investigates the case for adopting embodied energy as a novel and more capable metric for the value and cost of in-space activities. Energy is the natural …
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Ijtihad in Twelver Shi-ism : the interpretation and application of Islamic law in the context of changing Muslim society
The purpose of the thesis is to investigate whether Islamic laws, without relaxing the nature of the Shari 'a, could be expanded and adapted to meet the changing needs of modem Muslim societies. The focus is on the Shi'ites' approach to the law with special reference to the debates in Iran …
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Enforcing the ISM Code, and Improving Maritime Safety, with an Improved Corporate Manslaughter Act: A Safety Culture Theory Perspective
The International Safety Management (ISM) Code was introduced in 1998 in response to a number of high-profile maritime disasters, with the aim of establishing minimum standards for the safe operation of ships and creating an enhanced safety culture. It was the first piece of legislation introduced …
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Design and development of a frequency hopper based on the DECT system for the 902-928 MHz ISM band
… 15 rules for transmissions in the 902-928 MHz ISM band. A theoretical design of a slow frequency hopper (SFH) based on an existing DECT RF front end and a custom-designed system controller was developed. An innovative FH synchronization technique that eliminates the need for a separate FH …
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Technology development targets for commercial In-Space Manufacturing
In-Space Manufacturing (ISM) promises to revolutionize space systems by reducing mass, lowering costs, and enabling entirely new designs through the orbital fabrication of components in the space environment in which they are intended to operate for their entire life. Because ISM changes many …
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Design and evaluation of a modified in situ mesocosm to study denitrification in the Karlsruhe aquifer
To simplify the in situ mesocosm (ISM) design given in Schlag (1999), a modified ISM was designed and built in which a 6-inch long sand point replaces three 16-inch diameter screens. The modified design also includes an optional submersible pump mounted on top of the ISM chamber, making it capable …
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Modeling and Optimization of In-Space Manufacturing to Inform Technology Development
In-space manufacturing (ISM) has the potential to alter the paradigm of space system design by enabling fabrication of components that are unencumbered by launch-related design constraints. However, the size, weight, and power of manufacturing equipment can easily outweigh the benefits, while the …
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An Arcminute-Resolution Imaging Study of the H-alpha & [S II] Emission of the ISM from the Local Perseus Arm Using the Virginia Tech Spectral-Line Survey
… high spectral resolution images shows that the ISM's characteristics appear to be very similar at both degree and arcminute scales --- we see similar structures, and notice the same [S II]/H-alpha trend between those structures at both degree and arcminute scales. VTSS fields show three basic …
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Turbulence and structure formation in the interstellar medium
The interstellar medium (ISM) structure and dynamics are the result of the interplay between many physical processes such as turbulence, gravity, thermal processes, magnetic fields and cosmic rays which determine the modes of molecular cloud and star formation, and which in turn, define the global …
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Bend-Forming: A Deformation Process for In-Space Manufacturing of Truss Structures
In-space manufacturing (ISM) is a candidate approach for constructing next-generation space structures with larger dimensions than modern deployable systems. While many ISM approaches have been proposed, analysis of their performance for building precision structures on orbit, such as …
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International Student Mobility in Higher Education in China: Tensions between Policies and Practices
… has intensified. International Student Mobility (ISM) as a key part of IHE has attracted more attention as well. China, traditionally an exporter of students, is becoming a popular host country for international students as well. By examining relevant policies and international students’ …
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Orbital Forcing of Late Miocene-Pleistocene Environmental Change in the Zhada Basin, SW Tibetan Plateau
… and/or variability of Indian Summer Monsoon (ISM) circulation to both tectonic and climatic changes. However, discriminating the effects of tectonics and climate on ISM circulation and high-elevation environmental change has remained a challenge. I address this question using a …
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Electrochemical Modulation of Peripheral Nerves Using Ion-Selective Electrodes
… thesis, I examine the ion-selective membrane (ISM), a filter that discriminately transports single ions within mixed electrolytes, whose operation in ion delivery platforms does not suffer from the fundamental restriction of finite capacity. Specifically, I discuss the optimal design of the ISM …
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Self-Similar Models of Quasar Outflow Shock Structures
… and pushes the ambient interstellar medium (ISM) outward. This thesis analyses, combines and expands on existing analytic self-similar models of these structures in the context of quasar accretion disk winds; we then search for the bulk acceleration (positive or negative) of low-velocity Ca …
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