Electron scattering and bremsstrahlung cross- section measurements

Electron transmission measurements for aluminum and gold, and backscattering measurements on targets of iron, tin, aluminum, and gol

Electron bremsstrahlung produced in thick targets at incident electron energies of 0.2, 1.0, 2.0, and 2.8 MeV, part 3

Electron bremsstrahlung produced in thick targets at incident electron energies of 0.2, 1.0, 2.0, and 2.8 Me

The implications of vagueness

Due to the character of the original source materials and the nature of batch digitization, quality control issues may be present in this document. Please report any quality issues you encounter to [email protected], referencing the URI of the item.Includes bibliographical references (leaves 29-30).If grains of sand are added, one by one, to a growing collection of sand on an otherwise empty table, there will eventually be a "heap" of sand on the table. It seems impossible, however, to specify the precise point at which the collection becomes a heap. One grain of sand is certainly not a heap of sand. Does two grains comprise a heap? Can the collection be called a heap at three grains, at 10 grains, or at 500 grains? The commonly used term "heap" is vague -- there is no clear line, which demarcates the heaps from the non-heaps. The difficulty presented by this vagueness becomes clear when we examine the sorites paradox, a very old philosophical problem, which is centered around the premise that the term "heap" has no precise definition. If it is impossible to specify exactly which objects are heaps and which objects are not heaps, how do we continue to use the term with such impunity? Is it possible for a system of logic to model the use of vague terms, if their application is often "neither true nor false," or, "only a matter of interpretation?" How are we to understand the role of vagueness within language

Developing and Testing Concise Evangelistic Videos for Millennials and Generation Z in Columbia, Missouri

Problem Gathering an audience for evangelistic meetings has become increasingly difficult via traditional proclamation approaches. This challenge is even greater among young adults and has been observed where the researcher pastors in Columbia, Missouri. Research shows that technology has changed the way people choose to receive information. This is particularly true of Millennials and Generation Z. Additional strategies must be developed to meet the needs and demands of the digital age, especially by making use of concise online videos. Concise videos need to be developed and tested to aid in engaging with Millennials and Generation Z. Beyond that, it was also imperative that content delivery methods were developed because most concise videos released on the Internet receive very few views. Method This project was evaluated with a clear objective in mind—to measure the effectiveness of videos developed by the researcher to engage the interest of Millennials and Generation Z and invite them to an evangelistic series to share the gospel. Videos were developed and placed on various social media platforms for viewing. The videos were then run as paid ads in the college town of Columbia, Missouri, and the surrounding area. The videos were evaluated by the amount of time they were viewed and by cost per view. Finally, viewers were invited to attend a live evangelistic series in Columbia, Missouri. Results In total, forty videos were developed in this project and tested on social media platforms as paid ads. The data gathered included approximately 866,000 views in Columbia, Missouri, and the surrounding area. It was determined that the most productive platform for this approach was YouTube with Facebook a distant second. Twenty-five guests attended the live evangelistic series from the videos without indicating they had received a handbill. Nineteen of those were from YouTube and six were from Facebook. A slight majority, specifically 13, who came just from videos were in the target age range. Seven were Generation Z and six were Millennials. The results indicate older adults were also reached. Yet the percentage of young adult attendees was significant. Conclusion This project came to a successful conclusion. The plan to develop concise videos for Millennials and Generation Z and invite them to an evangelistic series was implemented and completed with promising results. This project has laid the groundwork for evangelists to have another successful method to draw a crowd

Stability Analysis of Krylov Subspace Spectral Methods for the 1-D Wave Equation in Inhomogeneous Media

Krylov subspace spectral (KSS) methods are high-order accurate, explicit time-stepping methods for partial differential equations (PDEs) that also possess the stability characteristic of implicit methods. Unlike other time-stepping approaches, KSS methods compute each Fourier coefficient of the solution from an individualized approximation of the solution operator of the PDE. As a result, KSS methods scale effectively to higher spatial resolution. This thesis will present a stability analysis of a first-order KSS method applied to the wave equation in inhomogeneous media

Electron interaction in matter

Data on the scattering of 1-MeV electrons in aluminum for the case of non-normal incidence, electron-bremsstrahlung cross-sections in thin targets, and the production of bremstrahlung by electron interaction in thick targets, are presented both in tabular and graphic form. These results may interest physicists and radiologists

Measurement of electron scattering in aluminum at 1.0 MeV for non-normal incidence, part 1

Electron scattering in aluminum and gold targets at 1.0 MeV for non-normal incidenc

Space Shuttle Main Engine radio frequency emissions

Several approaches to develop a diagnostics system for monitoring the operational health of the Space Shuttle Main Engine (SSME) are being evaluated. The ultimate goal is providing protection for the SSME as well as improving ground and flight test techniques. One scenario with some potential is measuring radio frequency (RF) emissions (if present) in the exhaust plume and correlating the data to engine health. An RF emissions detection system was therefore designed, the equipment leased, and the components integrated and checked out to conduct a quick-look investigation of RF emissions in the SSME exhaust plume. The system was installed on the A-1 Test Stand at Stennis Space Center, MS, and data were successfully acquired during SSME firings from May 3 to September 15, 1988. The experiments indicated that emitted radiation in the RF (20 to 470 MHz) spectrum definitely exists in the SSME exhaust plume, and is of such magnitude that it can be distinguished during the firing from background noise. Although additional efforts are necessary to assess the merit of this approach as a health monitoring technique, the potential is significant, and additional studies are recommended

Designing Game Based Learning – a Participatory Approach

Game Based Learning seems to be an interesting new possibility of teaching and learning, but the effort spent on designing games and the possible positive outcomes have to be weighed carefully. The following paper describes the development process and the conceptual design of a simulation game on sustainability for teenagers. The design process is participatory in nature. Members of the future group of learners are involved in the design process at every stage. This involvement is especially important to overcome the contradiction between the goal of the game as such and the pedagogical goal of the designers

The effects of sex and context on student\u27s interpretation of teachers\u27 high immediacy messages

Teacher immediacy has been positively associated with many desirable academic outcomes, including quality student-teacher relationships, student participation in the classroom and in extra-class interaction, and increased student learning. Thus, scholars have consistently encouraged educators to increase their use of immediacy in contacts with students. However, some previous research found that high levels of teacher immediacy can be problematic in relationships and detrimental to desirable educational outcomes. Immediacy behavior tends to promote personal relationships and inclusion. However, excessive immediacy may change the meaning that students receive from the behavior. Using a message interpretation perspective, this study examined how sex of the student and sex of the teacher effects students’ interpretations of teachers’ high immediacy behavior in both in-class and extra-class contexts. Results reveal that students interpret high immediacy from male teachers as control but the same behavior from female teachers is interpreted as caring. Students also perceive excessive immediacy as more inappropriate when it is from a male teacher than from a female teacher. Female students are more likely than male students to identify the high immediacy behavior as sexual harassment. Students are also more likely to interpret excessive immediacy as sexual harassment when it occurs in extra-class contexts, such as in the professor’s office or in informal contacts in the student center than in the classroom