Expert system verification concerns in an operations environment

The Space Shuttle community is currently developing a number of knowledge-based tools, primarily expert systems, to support Space Shuttle operations. It is proposed that anticipating and responding to the requirements of the operations environment will contribute to a rapid and smooth transition of expert systems from development to operations, and that the requirements for verification are critical to this transition. The paper identifies the requirements of expert systems to be used for flight planning and support and compares them to those of existing procedural software used for flight planning and support. It then explores software engineering concepts and methodology that can be used to satisfy these requirements, to aid the transition from development to operations and to support the operations environment during the lifetime of expert systems. Many of these are similar to those used for procedural hardware

630-mV open circuit voltage, 12% efficient n-Si liquid junction

We report the first experimental observation of a semiconductor/liquid junction whose open circuit voltage Voc is controlled by bulk diffusion/recombination processes. Variation in temperature, minority-carrier diffusion length, and/or in majority-carrier concentration produces changes in the Voc of the n-Si/CH3OH interface in accord with bulk recombination/diffusion theory. Under AM2 irradiation conditions, the extrapolated intercept at 0 K of Voc vs T plots yields activation energies for the dominant recombination process of 1.1–1.2 eV, in accord with the 1.12-eV band gap of Si. A crucial factor in achieving optimum performance of the n-Si/CH3OH interface is assigned to photoelectrochemical oxide formation, which passivates surface recombination sites at the n-Si/CH3OH interface and minimizes deleterious effects of pinning of the Fermi level at the Si/CH3OH junction. Controlled Si oxide growth, combined with optimization of bulk crystal parameters in accord with diffusion theory, is found to yield improved photoelectrode output parameters, with 12.0±1.5% AM2 efficiencies and AM1 Voc values of 632–640 mV for 0.2-Ω cm Si materials

Utilization of community resources in the intermediate grades.

Thesis (Ed.M.)--Boston Universit

"New" and distributed leadership in quality and safety in healthcare, or "old" and hierarchical? : An interview study with strategic stakeholders

Peer reviewedPostprin

Reading comprehension: critical reading in the primary grades

It is with this in mind that the writer wishes to study through recent research and new materials the need for developing critical reading skills in the primary grades and to establish the necessity of it as an on-going process through the child\u27s development

Land Grant Application- Crosby, Charles (Garland)

Land grant application submitted to the Maine Land Office on behalf of Charles Crosby for service in the Revolutionary War, by their widow Mary.https://digitalmaine.com/revolutionary_war_me_land_office/1222/thumbnail.jp

Exponential Genius: How African American Male Actuaries Develop Mathematical Expertise

This study explored the development of mathematical expertise among male African American actuaries, within the present hegemonic educational, social and cultural system of the US. Using qualitative methodologies, the emergent framework, Exponential Genius describes the common personality constructs, identity formation processes and formative experiences of accomplished African American male actuaries. The Exponential Genius schema is identified to be the byproduct of the coalescence of personal transactions and societal antecedents of the successful African American male actuary. The following: Endurance and Excellence, Equity, and Ecologies of Hope are recognized to be the agencies that provide the momentum and the catalytic impetus that contribute to the mathematical exceptionality of the African American male actuary and by extension necessary components for the mathematical success for African American males

Changing the subject:A community of philosophical inquiry in prisons

This article reports on part of a project that introduced philosophy programmes to a number of Scottish prisons. It centres on the deployment within these prisons of McCall’s (1991) Community of Philosophical Inquiry (CoPI). It provides a rationale for, and analyses the participation structure, of CoPI, setting out how its communicative constraints and demands provided prisoners with novel means of reasoning and engaging in dialogue with others and with oneself. In interviews conducted with a sample of participants, they described how the critical listening to, and reasoning with, each other in CoPI tutorials had allowed them to develop greater self-awareness and a more reflexive understanding of their own thinking and actions. Findings are framed within sociocultural theorising on literacies, learning and identity. Drawing on Holland, Lachicotte, Skinner & Cain (1998) account of identity and agency, the authors show how CoPI afforded participants a new positionality and discursive practices. (DIPF/Orig.

Finito o Infinito : una cuestión de gusto

The concept of infinite was always associated to the possible conclusion or creation of the world. The first philosophers knew that the possibility of existence of the infinite quantities cannot be discarded. But their attitude in front of this reality in the real world, the space and time, is very different.La idea de infinito ha estado siempre ligada a los problemas planteados por una posible conclusión del Mundo en el que el hombre habitaba. Los primeros filósofos sabían que no podían pasar por alto la posibilidad de la existencia de las cantidades infinitas. La actitud de estos pensadores respecto a la realidad del infinito en el mundo real, espacio y tiempo, ha sido históricamente muy diversa