8,078 research outputs found
A Mixed-Methods Study of the Variables that Influence Southern Baptists’ Affirmation of the Inerrancy of the Bible
The Southern Baptist Convention (SBC) had discovered by the late 1970s that belief in the inerrancy of the Bible was not consistently affirmed by their leadership. After a twenty year battle, the SBC attempted to clarify the doctrine of inerrancy through the Baptist Faith and Message 2000. A mixed-method analysis was conducted by surveying 502 Florida Southern Baptist (FSB) church members with a 68-question survey instrument to determine the degree to which they affirmed the doctrine of inerrancy. The study revealed that a large percentage of FSB church members affirmed the doctrine, but the underlining beliefs were not always consistently acknowledged
How pensions contribute to the premium paid to experienced public school teachers
Many argue that public school systems should stop linking teachers’ salaries so closely to their years of experience. However, the effect of deferred retirement compensation on the premium paid to experienced teachers has, to date, been underappreciated. To shed more light on this issue, we calculate the total compensation earned by teachers in New York City and Philadelphia from both salary and deferred retirement compensation under each system’s currently operating defined-benefit plan. Retirement compensation in both cities is back-loaded, which substantially increases the premium paid to highly experienced teachers. In late-career years, teachers often earn a larger compensation premium from the accrual of pension benefits than from salary. We show that cash-balance retirement plans, which are less back-loaded, would substantially reduce experience premiums without reducing the total compensation for the average entering teacher.http://sites.bu.edu/marcuswinters/files/2017/09/Pensions-and-Experience-Premium.pdfAccepted manuscrip
En route position and time control of aircraft using Kalman filtering of radio aid data
Fixed-time-of-arrival (FTA) guidance and navigation is investigated as a possible technique capable of operation within much more stringent en route separation standards and offering significant advantages in safety, higher traffic densities, and improved scheduling reliability, both en route and in the terminal areas. This study investigated the application of FTA guidance previously used in spacecraft guidance. These FTA guidance techniques have been modified and are employed to compute the velocity corrections necessary to return an aircraft to a specified great-circle reference path in order to exercise en route time and position control throughout the entire flight. The necessary position and velocity estimates to accomplish this task are provided by Kalman filtering of data from Loran-C, VORTAC/TACAN, Doppler radar, radio or barometric altitude,and altitude rate. The guidance and navigation system was evaluated using a digital simulation of the cruise phase of supersonic and subsonic flights between San Francisco and New York City, and between New York City and London
Vaccine Myths: Setting the Record Straight
Despite their standing as one of the most remarkable public health achievements, vaccines have been surrounded by dangerous myths since the development of the smallpox vaccine in the 18th century. In recent decades, with the publication of a fraudulent article linking vaccines to autism, the involvement of celebrities in the debate, and the rise of the internet and social media as sources for information for patients, these myths have become more widespread. This paper reviews four common vaccine myths: vaccines cause autism, vaccines are not safe, too many vaccines are given too soon, and the influenza vaccine is not necessary. For each of these myths, we review the origin and spread of misinformation. The authors then present the scientific evidence against each myth. Extensive research has found no link between vaccines, and particularly the MMR vaccine or the preservative thimerosal, and autism. The U.S. and world health agencies have effective mechanisms in place to review and monitor vaccine safety. These systems have worked to detect and evaluate even rare vaccine adverse events. The recommended vaccine schedule is safe for infants’ immune systems. The flu vaccine is an essential tool in the fight against the seasonal influenza deaths.
A consequence of these myths is that parents are choosing to delay or refuse recommended vaccines for themselves and their children. This has resulted in outbreaks of measles, pertussis, H. influenza type b, varicella, and pneumococcal disease in the United States. Unvaccinated and undervaccinated children risk contracting the disease themselves, and pose a risk to their community as herd immunity decreases. It is important to explore and refute the myths leading to decreased vaccination rates, so health care providers and parents can make educated decisions to protect children and ensure public health
From Baking a Cake to Solving the Schrodinger Equation
The primary emphasis of this study has been to explain how modifying a cake
recipe by changing either the dimensions of the cake or the amount of cake
batter alters the baking time. Restricting our consideration to the genoise,
one of the basic cakes of classic French cuisine, we have obtained a
semi-empirical formula for its baking time as a function of oven temperature,
initial temperature of the cake batter, and dimensions of the unbaked cake. The
formula, which is based on the Diffusion equation, has three adjustable
parameters whose values are estimated from data obtained by baking genoises in
cylindrical pans of various diameters. The resulting formula for the baking
time exhibits the scaling behavior typical of diffusion processes, i.e. the
baking time is proportional to the (characteristic length scale)^2 of the cake.
It also takes account of evaporation of moisture at the top surface of the
cake, which appears to be a dominant factor affecting the baking time of a
cake. In solving this problem we have obtained solutions of the Diffusion
equation which are interpreted naturally and straightforwardly in the context
of heat transfer; however, when interpreted in the context of the Schrodinger
equation, they are somewhat peculiar. The solutions describe a system whose
mass assumes different values in two different regions of space. Furthermore,
the solutions exhibit characteristics similar to the evanescent modes
associated with light waves propagating in a wave guide. When we consider the
Schrodinger equation as a non-relativistic limit of the Klein-Gordon equation
so that it includes a mass term, these are no longer solutions.Comment: 23 pages, 10 Postscript figure
A NASTRAN primer for the analysis of rotating flexible blades
This primer provides documentation for using MSC NASTRAN in analyzing rotating flexible blades. The analysis of these blades includes geometrically nonlinear (large displacement) analysis under centrifugal loading, and frequency and mode shape (normal modes) determination. The geometrically nonlinear analysis using NASTRAN Solution sequence 64 is discussed along with the determination of frequencies and mode shapes using Solution Sequence 63. A sample problem with the complete NASTRAN input data is included. Items unique to rotating blade analyses, such as setting angle and centrifugal softening effects are emphasized
Multiple Maltreatment, Attribution Of Blame, And Adjustment Among Adolescents
The present study had two purposes. First, it examined the combined and unique contribution of five maltreatment types to variance in adolescent adjustment (i.e., physical abuse, sexual abuse, emotional abuse, neglect and exposure to family violence). In accordance with contemporary social learning theory (social cognitive theory), it was hypothesized that aggressive forms of maltreatment would predict externalizing problems, particularly for boys, whereas nonaggressive maltreatment would predict internalizing problems. Second, the study examined the predictive utility of blame attributions for maltreatment. Integrating the writings of several theorists regarding blame attribution, it was predicted that self-blame would mediate or moderate internalizing problems, whereas other-blame would mediate or moderate externalizing problems. Mediator and moderator models were tested separately.;Adolescents (N = 160, aged 11-17) were randomly selected from the open caseload of a child protection agency. Subjects made global severity ratings regarding their experiences of the five types of maltreatment. Similar ratings were made for each subject by the adolescent\u27s social worker and by trained raters of case files. Subjects also completed the Attribution for Maltreatment Interview (AFMI) to assess self- and perpetrator-blame for each type of maltreatment they experienced. Subjects also completed a battery of measures assessing self- and caretaker-reported externalizing and internalizing symptomatology.;Discrepancies in maltreatment occurrence and severity judgements were found between adolescents and professionals. Adolescent maltreatment ratings significantly predicted self-reported adjustment, even when controlling for sex, age, SES, receptive vocabulary, and stressful life events. Emotional abuse was the most predictively potent maltreatment type, and enhanced the predictive utility of other maltreatment types.;The AFMI yielded five subscales: self-blaming cognition, self-blaming affect, self-excusing, perpetrator-blame, and perpetrator-excusing. Controlling for maltreatment severity, these subscales explained significant variance in self-reported adjustment. Self-blaming affect was the most potent, particularly among females. Attributions were found to both mediate and moderate maltreatment severity.;The findings were consistent with recent developments in social learning theory. They illustrated that victims\u27 subjective appraisals of maltreatment are important to adjustment. The sophistication of blame attribution processes among victims was underscored. Implications for theory, measurement, and clinical practice are discussed
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