Application of artificial intelligence to impulsive orbital transfers

A generalized technique for the numerical solution of any given class of problems is presented. The technique requires the analytic (or numerical) solution of every applicable equation for all variables that appear in the problem. Conditional blocks are employed to rapidly expand the set of known variables from a minimum of input. The method is illustrated via the use of the Hohmann transfer problem from orbital mechanics

Version Control in Online Software Repositories

Software version control repositories provide a uniform and stable interface to manage documents and their version histories. Unfortunately, Open Source systems, for example, CVS, Subversion, and GNU Arch are not well suited to highly collaborative environments and fail to track semantic changes in repositories. We introduce document provenance as our Description Logic framework to track the semantic changes in software repositories and draw interesting results about their historic behaviour using a rule-based inference engine. To support the use of this framework, we have developed our own online collaborative tool, leveraging the fluency of the modern WikiWikiWeb

Version Control in Online Software Repositories

Software version control repositories provide a uniform and stable interface to manage documents and their version histories. Unfortunately, Open Source systems, for example, CVS, Subversion, and GNU Arch are not well suited to highly collaborative environments and fail to track semantic changes in repositories. We introduce document provenance as our Description Logic framework to track the semantic changes in software repositories and draw interesting results about their historic behaviour using a rule-based inference engine. To support the use of this framework, we have developed our own online collaborative tool, leveraging the fluency of the modern WikiWikiWeb

An integrated theory of language production and comprehension

Currently, production and comprehension are regarded as quite distinct in accounts of language processing. In rejecting this dichotomy, we instead assert that producing and understanding are interwoven, and that this interweaving is what enables people to predict themselves and each other. We start by noting that production and comprehension are forms of action and action perception. We then consider the evidence for interweaving in action, action perception, and joint action, and explain such evidence in terms of prediction. Specifically, we assume that actors construct forward models of their actions before they execute those actions, and that perceivers of others' actions covertly imitate those actions, then construct forward models of those actions. We use these accounts of action, action perception, and joint action to develop accounts of production, comprehension, and interactive language. Importantly, they incorporate well-defined levels of linguistic representation (such as semantics, syntax, and phonology). We show (a) how speakers and comprehenders use covert imitation and forward modeling to make predictions at these levels of representation, (b) how they interweave production and comprehension processes, and (c) how they use these predictions to monitor the upcoming utterances. We show how these accounts explain a range of behavioral and neuroscientific data on language processing and discuss some of the implications of our proposal

Laser communication system for controlling several functions at a location remote to the laser

A multichannel laser remote control system is described. The system is used in areas where radio frequency, acoustic, and hardware control systems are unsatisfactory or prohibited and where line of sight is unobstructed. A modulated continuous wave helium-neon laser is used as the transmitter and a 360 degree light collector serves as the antenna at the receiver

Organizational change and development : annotated and supplemental bibliography / 191

Includes bibliographical references (p. 48-80)

XVII.— Remarks on some new or little-known species of Thynnidæ ( Hymenoptera )

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Peer Social Networks After the Transition to Secondary School : Adolescents\u27 Perspectives

The transition from primary to secondary school has a considerable impact upon the social and academic lives of adolescents. An adolescent\u27s sense of belonging (SoB) is important for determining school satisfaction and success during this transition. As SoB is partly developed through an individual\u27s peer social network, this study explored the peer social networks for adolescents who have a SoB. Using the Psychological Sense of School Membership (PSSM) scale (Goodenow, 1993a), five females and three males with a high SoB completed sociological maps and participated in interviews in order to determine the structure and function of their peer social networks. The results indicate that peer social networks contribute to SoB primarily through their structure and the psychological functions they serve. Key results include the finding that those networks which have a degree of stability, and those in which the adolescent is able to identify a close friend whom they trust, are most valuable for promoting SoB. The value of having friends with whom the adolescent feels a sense of history was reported to be particularly important by the adolescents in this study. Furthermore, the results indicate that there is no single structure of peer social networks that is most valuable in promoting SoB, as it is the psychological function of the network itself which fosters a SoB. Several areas for future research are identified, including a comparison between those students who report lower SoB at school and those who report high SoB, and a longitudinal study analysing trends in peer social networks across the school year after the transition to secondary school