Study of photon correlation techniques for processing of laser velocimeter signals

The objective was to provide the theory and a system design for a new type of photon counting processor for low level dual scatter laser velocimeter (LV) signals which would be capable of both the first order measurements of mean flow and turbulence intensity and also the second order time statistics: cross correlation auto correlation, and related spectra. A general Poisson process model for low level LV signals and noise which is valid from the photon-resolved regime all the way to the limiting case of nonstationary Gaussian noise was used. Computer simulation algorithms and higher order statistical moment analysis of Poisson processes were derived and applied to the analysis of photon correlation techniques. A system design using a unique dual correlate and subtract frequency discriminator technique is postulated and analyzed. Expectation analysis indicates that the objective measurements are feasible

Detector panels-micrometeoroid impact Patent

Development of large area micrometeoroid impact detector panel

Hmong History and LGBTQ Lives: Immigrant Youth Perspectives on Being Queer and Hmong

This article highlights some of the cultural barriers that exist for Hmong people who identify as lesbian, gay, bisexual, transgender, and queer (LGBTQ), while placing these barriers in an historical context. It uncovers differences and similarities found between the experiences of queer Hmong youth and the larger population of queer youth living in the United States. Despite the perception that a traditional Hmong culture holds no place for queer Hmong Americans, individuals are finding spaces for acceptance and slowly moving the larger Hmong community to a place of understanding and tolerance. A vital part of this movement is Shades of Yellow (SOY), an organization that supports queer Hmong. The life stories of three of its members inform this study, offering a more nuanced look at the experiences of queer Hmong living in the Midwest. Though few social studies researchers have broached this topic, the new social historians of the 1960s, who centered their research on broad social movements and the contributions of those formerly excluded from the grand historical narrative of progress, opened the door to this conversation within the field

Horizontal Resistance to Leaf Rust in Spring Wheat

Stem rust, Puccina graminis tritici Eriks. And Henn., and leaf rust, Puccinia recondite Rob. Ex Desm., have been major diseases of wheat in the northern great plains for many years. As a result of several severe wheat rust epidemics within the past 50 years, much effort has been directed toward control of these diseases. Resistant varieties have been introduced over the years, but wheat rusts remain serious problems, causing losses to farmers in spite of breeding efforts. Since the discovery that both stem and leaf rust exist in several biological forms called races (18, 25), wheat breeding has been develop resistance toward the prevalent races in a given area. Because new races develop from natural sources, and non-prevalent races may become prevalent, breeding for resistance to specific races is a continuous struggle. As long as this situation exists, there will be no end to the breeding for resistant varieties. If resistance could be found that would be uniform in its effect on all races of rust, this might provide an answer to the problem. Several investigators have suggested that a uniform type of resistance exists. J.E. Van der Plank has proposed the name “horizontal resistance” for this and is the leading proponent of its existence. If Van der Plank is correct, and this form of resistance does exist in wheat, its use could revolutionize wheat breeding. This study has been conducted to determine if horizontal resistance to leaf rust can be detected in spring wheat

Meaning and method : a comparative study of Edmund Husserl and Ezra Pound

In his essay entitled Phenomenology of Heading Georges Poulet explains how a reading is possible The universe of fiction is infinitely more elastic than the world of objective reality. It lends itself to any use; it yields with little resistance to the importunities of the mind. Moreover - and of all the benefits I find this the most appealing - this interior universe constituted by language does not seem radically opposed to the me who thinks it.... In short, since everything has become part of my mind, thanks to the intervention of language, the opposition between the subject and its objects has been considerably attenuated. And thus the greatest advantage of literature is that I am freed from my usual sense of incompatibility between my consciousness and its objects. The dissolution of this subject-object dualism is not the only factor involved. Poulet shows that reading is a way of giving way not only to a host of alien words, images, ideas, but also to the very alien principle which utters them and shelters them

Nuclear design and experiments for a space power reactor

Design and experiments with compact fast spectrum reactor for generating electric power in spac

Assessment of the potential of solar thermal small power systems in small utilities

The potential economic benefit of small solar thermal electric power systems to small municipal and rural electric utilities is assessed. Five different solar thermal small power system configurations were considered in three different solar thermal technologies. The configurations included: (1) 1 MW, 2 MW, and 10 MW parabolic dish concentrators with a 15 kW heat engine mounted at the focal point of each dish, these systems utilized advanced battery energy storage; (2) a 10 MW system with variable slat concentrators and central steam Rankine energy conversion, this system utilized sensible thermal energy storage; and (3) a 50 MW central receiver system consisting of a field of heliostats concentrating energy on a tower-mounted receiver and a central steam Rankine conversion system, this system also utilized sensible thermal storage. The results are summarized in terms of break-even capital costs. The break-even capital cost was defined as the solar thermal plant capital cost which would have to be achieved in order for the solar thermal plants to penetrate 10 percent of the reference small utility generation mix by the year 2000. The calculated break-even capital costs are presented

Small high-temperature nuclear reactors for space power

Criticality calculations for small, cylindrical, lithium cooled reactors for space power system

Let Us Celebrate: Negotiating Black Joy in Academic (Un)Conference Spaces

This co-authored piece shares a story about how two Black conference-goers negotiated joy in an (un)conference space. In turn, finding celebration within sometimes volatile, traditional academic conferences. Black Educology scholarship would benefit from more specific investigations into how Black conference-goers celebrate each other across their dynamic identities. We inquire about how a conference session co-facilitator (Nate) and an audience member (JB) negotiated, experienced, and built relationships across their positionalities and roles in the (un)conference space. We interpreted themes from our dialogue, post-session conversations, converged lived experiences, intercollegiate exchanges, symposium planning agendas, and written notes. The three themes, Convergent Social Localities, Blackness as Dynamic, and Stirred Up, inform implications for celebration in Black (un)conference spaces. The conclusion forwards how conference planners may center BlackEducology via for-us-by-us, authenticity, and being

Chemistry of fuel deposits and sediments and their predursors

The mechanism of solid deposit formation on hot engine parts from turbine fuels is investigated. Deposit formation is associated with oxidation of the hydrocarbon fuel. Therefore, oxidation rates and soluble gum formation were measured for several jet turbine fuels and pure hydrocarbon mixtures. Experiments were performed at 130 C using thermal initiation and at 100 C using ditertiary butyl peroxide as a chemical initiator. Correlation of the data shows that the ratio of rate of oxidation to rate of gum formation for a single fuel is not much affected by experimental conditions, even though there are differences in the abilities of different hydrocarbons to initiate and continue the oxidation. This indicates a close association of gum formation with the oxidation process. Oxidations of n-dodecane, tetralin and the more unstable jet fuels are autocatalytic, while those of 2-ethylnaphthalene and a stable jet fuel are self-retarding. However, the ratio of oxidation rate to gum formation rate appear to be nearly constant for each substrate. The effect of oxygen pressure on gum and oxidation formation was also studied. Dependence of gum formation on the concentration of initiator at 100 C is discussed and problems for future study are suggested