Tantalum modified ferritic iron base alloys

Strong ferritic alloys of the Fe-CR-Al type containing 0.4% to 2% tantalum were developed. These alloys have improved fabricability without sacrificing high temperature strength and oxidation resistance in the 800 C (1475 F) to 1040 C (1900 F) range

Advanced materials research for long-haul aircraft turbine engines

The status of research efforts to apply low to intermediate temperature composite materials and advanced high temperature materials to engine components is reviewed. Emerging materials technologies and their potential benefits to aircraft gas turbines were emphasized. The problems were identified, and the general state of the technology for near term use was assessed

Evaluation of alloys and coatings for use in automobile thermal reactors

Several candidate alloys and coatings were evaluated for use in automobile thermal reactors. Full-size reactors of the candidate materials were evaluated in cyclic engine dynamometer tests with a peak temperature of 1040 C (1900 F). Two developmental ferritic-iron alloys, GE-1541 and NASA-18T, exhibited the best overall performance by lasting at least 60 percent of the life of test engine. Four of the alloys evaluated warrant consideration for reactor use. They are GE-1541, Armco 18 SR, NASA-18T, and Inconel 601. None of the commercial coating substrate combinations evaluated warrant consideration for reactor use

Opportunities for ceramics in the ERDA/NASA continuous combustion propulsion systems program

An overview on engine development projects for potential use of ceramics is reported. A major ceramics materials technology effort is described to meet anticipated engine system requirements in terms of the automotive application, some of the more pressing technology needs, and some indications of how to conduct this technology program with industry-engine development projects focus on both gas turbine and Stirling engines

Hagenheim Series By Melanie Dickerson: Creating Active Fairy Tale Heroines with the Christian Feminist Voice

Charles Perrault, Hans Christian Andersen, and the Brothers Grimm; these four men are the great authors and compilers of western canon fairy tales. They may have created the canon, but others have expanded it through multiple means, including adaptations. One current author is Melanie Dickerson with the Hagenheim Series. Her adaptations alter the setting, characters, and a few other elements, but the most critical part of her work is the addition of the Christian-feminist voice. In the original fairy tales, the female protagonists were passive and uninspiring, but in Hagenheim, they are active heroines because Christianity and feminist ideas work together. In accomplishing the task, the first step is to examine patriarchy, equality, and the purpose of fairy tales. The second chapter defines heroine and then adds the descriptions of active and Christian Feminist voices. Finally, the first four books are analyzed using the three basic concepts of independence, transformation, and concept of self in connection with what is established in previous chapters. These elements work together within the unique combination of Christianity and Feminism to create an unexpected addition to fairy tales. The task is completed by pulling from the works of Marie-Louise Von Franz, Rebecca C. Hains, Miriam Forman-Brunell, Beth Allison Barr, and quite a few other academics

Small Town Urban Revitalization: The Effect of Pullman Square on Downtown Huntington, West Virginia

After many years of being the center of shopping, business and entertainment, the downtown began to decline nationally. This decline began after the end of WWII and ran concurrent to the beginning of suburbanization and the emergence of large, indoor shopping malls. Many cities began to realize the importance of a healthy downtown and implemented strategies to revitalize their downtown. This thesis focuses on the emergence of Pullman Square in Huntington, WV, its effect on the downtown, and how it has spawned other retail development and revitalization strategies throughout the city center

Free No More

We have for many years in the U.S. Department of Agriculture been running a huge vanity press, I believe, catering more to the whims of authors and their administrators and the political appointees rather than first considering markets for the publications themselves

Photosynthetic reaction center complexes from heliobacteria

The goal of this project is to understand the early evolutionary development of photosynthesis by examining the properties of reaction centers isolated from certain contemporary organisms that appear to contain the simplest photosynthetic reaction centers. The major focus of this project is the family of newly discovered strictly anaerobic photosynthetic organisms known as Heliobacteria. These organisms are the only known photosynthetic organisms that are grouped with the gram-positive phylum of bacteria. The properties of these reaction centers suggest that they might be the decendants of an ancestor that also gave rise to Photosystem 1 found in oxygen-evolving photosynthetic organisms. Photoactive reaction center-core antenna complexes have been isolated from the photosynthetic bacteria Heliobacillus mobilis and Heliobacterium gestii. The absorption and fluorescence properties of membranes and reaction centers are almost identical, suggesting that a single pigment-protein complex serves as both antenna and reaction center. Experiments in progress include sequence determination of the 48,000 Mr reaction center protein, and evolutionary comparisons with other reaction center proteins

The fungal frontier

A report of the 24th Fungal Genetics Conference, Asilomar, USA, 20-25 March 2007