Detection of variable frequency signals using a fast chirp transform

The detection of signals with varying frequency is important in many areas of physics and astrophysics. The current work was motivated by a desire to detect gravitational waves from the binary inspiral of neutron stars and black holes, a topic of significant interest for the new generation of interferometric gravitational wave detectors such as LIGO. However, this work has significant generality beyond gravitational wave signal detection. We define a Fast Chirp Transform (FCT) analogous to the Fast Fourier Transform (FFT). Use of the FCT provides a simple and powerful formalism for detection of signals with variable frequency just as Fourier transform techniques provide a formalism for the detection of signals of constant frequency. In particular, use of the FCT can alleviate the requirement of generating complicated families of filter functions typically required in the conventional matched filtering process. We briefly discuss the application of the FCT to several signal detection problems of current interest

Catalogue of solar activity during 1957

Catalog of major solar activity during 195

Engaging an Unengaged Demographic: A Phenomenological Study of Christian Millennials’ Engagement with Religious and Nonreligious Memberships

Church membership is declining worldwide. Studies show that Millennials are less likely to belong to a church than previous generations. Even among churched Millennials, only 48% of church-attending Millennials are church members. Simultaneously, organizations such as health, fitness, and social clubs are seeing an increase in Millennial membership growth. Brand loyalty is high among Millennials, but church loyalty is low even among practicing Christian Millennials who attend church at least once per month. The purpose of this qualitative phenomenological study was to explore how practicing Christian Millennials understand the nature of engagement with church and nonreligious memberships and the factors that shape those commitments. Practicing Christian Millennials were generally defined as anyone born between 1981 and 1996 who self-identified as a Christian and attended a trinitarian Protestant church in the United States at least once per month. The methodology guiding this study was Husserl’s phenomenological approach to gaining insight into the phenomenon of Christian Millennials’ engagement rates with religious and nonreligious memberships

Solar activity catalogue. Volume I - Catalogue of solar activity during 1954 - 1956

Catalog of solar activity during 1954-195

Effect of various levels of bird resistant grain sorghum on the live performance and carcass characteristics of meat type swine

Data were collected on 40 Duroc hogs at the University of Tennessee Agricultural Experiment Station, Knoxville, Tennessee to determine the effect of various levels of bird resistant grain sorghum on live perform-ance and carcass characteristics in meat type swine. Rations containing 25, 50, 75, or 100 percent grain sorghum in the grain portion of the ration, were compared with a control ration consisting of 100 percent corn. The protein level (16 percent) remained constant throughout the experiment. There were no significant differences between any of the rations for average daily gains (ADG) during the periods from 40 to 90 pounds, 90 to 140 pounds, 140 to 190 pounds, or 40 pounds to market weight. How-ever, the highest ADG resulted when pigs were fed the 100 percent corn or 25 percent grain sorghum rations. In the periods from 40 to 140 pounds, all of the rations appeared to be equal in producing gain. In a comparison of feed conversion from 40 pounds to market weight between the control ration and rations containing 50, 75, and 100 percent grain sorghum, there was a significant difference (P \u3c ,05) in favor of the control. There was also a significant (P \u3c .01) linear relationship between the percentage of grain sorghum in the ration and the amount of feed required per pound of gain. As the percentage of grain sorghum in the ration increased, the amount of feed required per pound of gain also increased. The increased amount of feed required per pound of gain for the pigs fed the grain sorghum rations ranged from 3 to 8 percent above that amount required by pigs fed the control ration. decreased digestibility of the grain sorghum rations is possibly responsible for the poor feed conversion of the animals fed these rations as shown by the feeding trials

Catalogue of Solar Activity During 1958, Volume III

Solar flares, sunspots, radio emissions, solar events, geomagnetic storms, solar-terrestrial effects, and balloon flights for 195