Analysis and simulation of a cross-correlation communication system

Statement of the problem. The purpose of this study was (1) to calculate the probability of error as a function of receiver input signal-to-noise ratio for a typical communication system employing cross-correlation detection; (2) to design and construct an experimental model of such a communication system for the purposes of demonstrating the operation of the system and verifying the theoretical calculations --Introduction, page 1

A predictive model of adolescent pregnancy risk : a black-white comparison.

The purpose of this study was to delineate the role of race in the prediction of at-risk status for pregnancy among Black and White high school females from low socioeconomic backgrounds. Research findings relative to adolescent pregnancy were assimilated into a proposed three factor model of pregnancy risk which included: Knowledge and Attitude toward Sexuality and Childbearing, Current Life Situation, and Opportunity for Sex. A questionnaire was developed to assess risk factors within the structure of the three model factors. The questionnaire examined the social, familial, and personal variables that influence a teen\u27s sexual activity. The questionnaire was administered to 152 high school females aged 14-19. It was hypothesized that: (1) at-risk status for pregnancy was associated with high risk scores on the model variables and factors; (2) Black subjects would receive higher risk scores on the Knowledge and Attitude toward Pregnancy and Childbearing factor than White students and that Current Life Situation and Opportunity for Sex would predict pregnancy status but show no racial differentiation; (3) if the second hypothesis was correct, a differential pattern of pregnancy risk by race would result that could be incorporated into a model that discriminates risk status by race. The scores on the variables were analyzed through the use of: multivariate tests of significance (MANOVA), univariate $F$-tests, and discriminant function analyses. Additionally, factor analysis was used to assess the proposed model and develop new models for specific application. Not all hypotheses were accepted. Pregnancy status was predicted by the first hypothesis with findings reaching significance. On hypothesis 2, White pregnant subjects were more at-risk than other groups followed by Black pregnant subjects, Black never-pregnant subjects and, finally, White never pregnant-subjects. The questionnaire identified differential patterns for each racial group which validated the use of a stepwise discriminant analysis to help discriminate pregnancy risk status by race. The use of discriminant analysis derived variables increased prediction of pregnancy accuracy to 98.48% for Black subjects and 94.52% for White subjects. The need for replication studies and investigations of other racial and ethnic groups is discussed

Church Revitalization Through Effective Women’s Ministry

America’s churches are in crisis. Historically, women are the majority and have been the backbone of the American Church. They go faithfully to churches where their needs are often overlooked, not identified, and they are unfulfilled. They faithfully serve the ministry while they are suffering in silence and waiting for the church to respond. The following thesis explores church revitalization efforts through effective women’s ministry. A qualitative approach will be utilized to collect and analyze the data. The data will be collected through recorded personal interviews and observations. Some interview statements will be measured on a Likert scale to judge the current success of the church in meeting the needs of the women. Also, the data will be coded to identify emerging themes. This author believes that through the implementation of an effective women’s ministry, the women’s needs will be identified, met, and will improve the church’s growth and health

The Effects of Gestation Housing on the Reproductive Performance of Gestating Sows: A Progress Report

There is increasing interest in evaluating group housing for gestating sows. The majority of gestating sows are housed in individual stalls or crates for the majority of the gestation period (100–110 days). Hoop structures are low-cost shelters that can be used for swine. By using feeding stalls and cornstalk bedding, hoops provide a feasible housing system for gestating swine. The objective of this long-term study is to evaluate effects of gestation housing on reproductive performance of sows. Group-housed gestating sows in static groups were compared to sows in individual gestation crates. Static refers to a group of sows that is managed as a group without mixing with other groups of sows. The group farrows, is bred, and gestated as an intact group. Replacement gilts are added to the group after farrowing

Regenerable adsorption system

A method for regenerable adsorption includes providing a substrate that defines at least one layer of ultra short channel length mesh capable of conducting an electrical current therethrough, coating at least a portion of the substrate with a desired sorbent for trace contaminant control or CO.sub.2 sorption, resistively heating the substrate, and passing a flowstream through the substrate and in contact with the sorbent

The Age Structure of Contemporary Homelessness: Risk Period or Cohort Effect?

This paper assesses the age composition of the sheltered homeless population and how the age of this population – both single adults and adults in families – have changed over the past two decades. Data for this study came from administrative records on shelter use in New York City and from the nationwide shelter and general population enumerations in each of the last two decennial census enumerations. Results are presented in a series of figures to illustrate 1) the changes in the age distributions of the homeless population over time; and 2) the age distribution of homeless populations compared to other populations. In the late 1980s, homeless single adults and adults in families were relatively young, with the median age for both being in the late-twenties. Subsequently, however, these household types appear to have diverged, as the birth cohort from which the young single adults had come (born 1954-1965) has continued to be overrepresented in the shelter population, whereas homelessness among adults in families has remained linked to households in the early parenting years (ages 18-23). While the families and the single adults may have experienced some common precipitating factors that led to the emergence of homelessness in the 1980s, the young mothers appear to age out of their risk for homelessness while homelessness among this birth cohort of single adults sustains. Hypotheses are discussed regarding the social and economic factors that may be associated with disproportionate housing instability and homelessness among adults from the latter half of the baby boom cohort. Implications for public policy are considered, including the premature risk of disability, frailty and mortality associated with this cohort