Satellite auxiliary propulsion systems

Report is announced which describes techniques for selecting optimum system for specific satellite mission. Descriptions of propulsion systems are presented along with illustrations and diagrams. Report contains references, cost-effectiveness techniques, and reliability measurements and estimates

A NASA initiative: Software engineering for reliable complex systems

The objective is the development of methods, technology, and skills that will enable NASA to cost-effectively specify, build, and manage reliable software which can evolve and be maintained over an extended period. The need for such software is rooted in the increasing integration of software and computing components into NASA systems. Current NASA Software Engineering expertise was applied toward some of the largest reliable systems including: shuttle launch; ground support; shuttle simulation; minor control; satellite tracking; and scientific data systems. Unfortunately, no theory exists for reliable complex software systems. NASA is seeking to fill this theoretical gap through a number of approaches. One such approach is to conduct research on theoretical foundations for managing complex software systems. It includes: communication models, new and modified paradigms, and life-cycle models. Another approach is research in the theoretical foundations for reliable software development and validation. It focuses upon formal specifications, programming languages, software engineering systems, software reuse, formal verification, and software safety. Further approaches involve benchmarking a NASA software environment, experimentation within the NASA context, evolution of present NASA methodology, and transfer of technology to the space station software support environment

American Native Beef Cooperative

The American Native Beef project involved a failed attempt to establish cow and bull slaughter operation in Southeast Oklahoma. The effort was initially organized as a new generation cooperative and raised over US$2.5M from area producers who retained their funds in escrow for over 5 years despite numerous opportunities to withdraw their investment. The business model was restructured several times to attract equity capital from outside investors. The case provides insights into the linkages between business strategy and business structure. It also raises the question as to whether the project could have been successful under the original business model.Agribusiness, Livestock Production/Industries,

Factors Impacting Participation In and Purchases Made by Members of the Oklahoma Food Cooperative

The Oklahoma Food Cooperative (OFC) facilitates transactions between producers and consumers of locally-grown food items. Even with more than 3,000 members and roughly $1M in annual sales, the OFC still needs to establish its long-term sustainability. Both customer-members and supplier-members of the OFC were surveyed to determine the factors driving their current and continued participation in the cooperative.cooperative, local food movement, member communications, business sustainability, strategic planning, Agribusiness, Institutional and Behavioral Economics, Marketing,

Energizing a Cooperative Class with Cooperative Feasibility Software

Teaching/Communication/Extension/Profession, Agribusiness,

FACTORS INFLUENCING CONSUMER DECISIONS RELATED TO "NATURAL" BEEF IN THE SOUTHERN PLAINS

Consumer/Household Economics,

System and method for determining triage categories

Embodiments disclosed herein provide a system, method, and computer program product for providing a triage clas- sification system. The triage classification system uses a computer model that is developed using historical patient data. The developed computer modelis applied to collected patientattributedatafromapatientinapre-hospitalsetting to generate a triage category. Based on the generated triage category, health care professionals can take desired actions, suchastransportingthepatienttoafacilitymatchingthe generated triage category.Board of Regents, University of Texas Syste

Feasibility of a Co-operative Winery

The number of operating wineries in the United States has doubled during the past decade. Most of this growth has been due to a large number of entrepreneurial landowners developing their own small acreage vineyards and trying to branch into winemaking. However, wineries are capital-intensive enterprises which require high initial investment and experience lagged cash flow associated with the time between the purchase of grapes and initial wine sales. Additionally, the availability of local grape production often limits the production capabilities of an entrepreneur’s small winery. As a result, some vineyard owners consider establishing co-operative wineries. This paper describes a feasibility assessment tool developed to assist vineyard owners in examining the potential for a co-operative winery and provides an example of how this tool can be used to examine a number of co-operative operating scenarios.co-operative, feasibility template, qualified and nonqualified stock, revolving equity, winery, Agribusiness, Financial Economics,

Effect of Mn doping on ultrafast carrier dynamics in thin films of the topological insulator Bi2Se3

Transient reflectivity (TR) measured at laser photon energy 1.51 eV from the indirectly intersurface coupled topological insulator Bi2-xMnxSe3 films (12 nm thick) revealed a strong dependence of the rise-time and initial decay-time constants on photoexcited carrier density and Mn content. In undoped samples (x = 0), these time constants are exclusively governed by electron-electron and electron-phonon scattering, respectively, whereas in films with x = 0.013 - 0.27 ultrafast carrier dynamics are completely controlled by photoexcited electron trapping by ionized Mn2+ acceptors and their dimers. The shortest decay-time (~0.75 ps) measured for the film with x = 0.27 suggests a great potential of Mn-doped Bi2Se3 films for applications in high-speed optoelectronic devices. Using Raman spectroscopy exploiting similar laser photon energy (1.58 eV), we demonstrate that due to indirect intersurface coupling in the films, the photoexcited electron trapping in the bulk enhances the electron-phonon interaction strength in Dirac surface states

Increasing U.S. Hard Red Winter Wheat Competitiveness in Latin American Markets

The United States wheat sector leadership in world markets is facing serious challenges. Canada, Australia, Argentina, the European Union (EU), and the Former Soviet Union (FSU) are growing contenders for international wheat markets. Wheat buyers´ concerns about quality specifications and its consistency have intensified without precedents in the last years. The study focuses on identifying the attributes that wheat buyers most value at the moment of purchase. The study will be done in two stages. The first stage will focus in estimating preferences from actual wheat transactions from different grain-sheds in the HRW growing area. The second stage will focus on the demand from Latin American millers and will estimate their attribute preference and elicit willingness to pay. The second stage will start with Mexican millers, given their importance for the HRW exports. A hedonic price model will be used for the first stage. The second part of the study will attempt to elicit miller´s preferences by using a self explicated approach. Expected results are that the "easy-to-measure attributes": test weight, and protein levels; and all functionality characteristics such as bake absorption, farinograph peak time, farinograph stability, alveograph p/l ratio will be the most valued by the wheat customers. We hypothesize that millers will be willing to pay a premium if those attributes are present in desirable levels. The information should provide insight into the efforts being made by wheat marketing agencies and the U.S. Wheat Associates to promote quality-based marketing of wheat to domestic and foreign millers. Discussion may also include the impacts of quality-based marketing on U.S. share of the world wheat market.International Relations/Trade,