Optical Processing of Microwave Signals for Small Satellite Payloads

For low altitude small satellite applications performing electronic surveillance or communication transponding missions highly capable payloads are needed. Generally these spacecraft have low dwell times over the areas of interest and must receive, or search for, signals over a wide frequency band. This paper presents an approach to the implementation of optical processing in complex electronic systems intended to receive and operate on multiple radio frequency (or microwave) signals. The goal is to exploit the rapidly expanding field of linear and nonlinear optics to synthesize transponders and receiving systems for satellites and other platforms. The inputs are assumed to be microwave. The outputs are assumed to be microwave or electronic (digital). In between, the signal operations are performed optically. The focus of the effort is in the architecture for the electronic functions, that allow optical component realization. These elements perform the signal processing operations of: pulse signal detection and pulse parameter estimation; modulation and demodulation of AM, PM, and PM carriers; phase locked loop signal tracking; carrier element mixing (frequency shifting); signal filtering; and signal matched filter detection. The spatial optical processing of ordinary time waveform signals offers significant potential benefits. It inherently provides wide bandwidth, high carrier frequency, and fast response processing capability. A signal Fourier transforms can be performed with a simple lens. The second spatial dimension for parallel processing enhances the capability for exhaustive search of a signal space for parameters of interest. The two-dimensional optical implementation of switching and routing matches the channelized nature of many current communication systems. Increased optical implementations of electronic systems can take advantage of the rapid technological growth in applications and devices in this parallel discipline of optics to effect greater capabilities for the 1990\u27s

The benefits to be derived by the stockmen from the eradication of contagious diseases

Citation: Sullivan, Dan C. The benefits to be derived by the stockmen from the eradication of contagious diseases. Senior thesis, Kansas State Agricultural College, 1908.Introduction: As an industry stock raising is classes as one of the highest. Since the beginning of man the horse, cow, and other domestic animals have been his companion, his beast of burden, have furnished material for his clothing, have served as his food; even back in Bible times we read of herds of cattle being raised and used by means of profit by the people

Has Anybody Here Kissed Toodles?

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A Flower from the fields of Alabama

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Qualitative methods in globalisation studies : or, saying something about the world without counting or inventing it

This paper originally appeared as a book chapter in a volume oriented towards social science graduate students preparing for fieldwork, primarily in ‘developing country’ contexts. It has been reworked extensively here as a contribution for a recent CSGR seminar series by core research staff regarding our methodological approaches to research. As such, the paper provides an overview of some qualitative research methods in the social sciences, and of their relevance for conducting research in a continuing context of ‘globalisation’: which here refers to increasing supraterritoriality in domains of human organisation, and the relative collapsing of temporal and spatial scales that this implies. We focus on three key methodological domains: participant observation (and/or observant participation), oral testimony and the production of ethnographic texts; discourse analysis; and considerations of the subjective implied by phenomenological and embodiment approaches. We also make some comments regarding relationships between qualitative and quantitative methods and the implications of these different tools for engagement in terms of the information they yield. We observe that it is not so much research methods that have changed under contemporary globalisation processes. Rather, we note that orientations to research and to the interpretation of ‘findings’ - particularly in relation to certainty, to the implications of notions of difference and ‘the other’, and to aspirations of objectivity - have been much affected by the intertwined theoretical fields of poststructuralism, postcolonialism and feminism. Thus by highlighting the infusion of power in research praxis as in social relations more generally, we acknowledge the always politically constitutive role(s) of academic engagement

While You Think Of Mother You\u27ll Never Go Wrong

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Girl I\u27ll Call My Sweetheart Must Look Like You

[Verse 1] Now while oft I’ve been wandering, sad and alone, I’ve just dreamed, dreamed, dreamed Of a pair of blue eyes that delightfully shone, and how grand they seem’d! They would stare at me, glare at me, try to console, and what could I do? When at times they would look into my very soul and say: “I love you.” [Chorus] The girl I’ll call my sweetheart must have eyes of Irish blue, And her cheeks must blush like roses fondly kiss’d by morning dew. She must vow to love me truly, And love old Ireland too; For the girl I’ll call my sweetheart must look like you. [Verse 2] All around me they now cast their sweet magic spell under moon or sun, And I’m longing my story of true love to tell to the only one. Sure, today such a beautiful vision I’ve seen of a sweet colleen; I believe that I soon will be claiming the hand of my Fairy queen. [Chorus