A magnetic survey over part of the stublick fault system and its geophysical interpretation

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Analysis and design of space vehicle flight control systems. Volume X - Man in the loop

Methods for use in design and analysis of space vehicle flight control systems - recommendations for placing man in control loop of booster

Kolmogorov-Burgers Model for Star Forming Turbulence

The process of star formation in interstellar molecular clouds is believed to be controlled by driven supersonic magnetohydrodynamic turbulence. We suggest that in the inertial range such turbulence obeys the Kolmogorov law, while in the dissipative range it behaves as Burgers turbulence developing shock singularities. On the base of the She-Leveque analytical model we then predict the velocity power spectrum in the inertial range to be E_k ~ k^{-1.74}. This result reproduces the observational Larson law, ~ l^{0.74...0.76}, [Larson, MNRAS 194 (1981) 809] and agrees well with recent numerical findings by Padoan and Nordlund [astro-ph/0011465]. The application of the model to more general dissipative structures, with higher fractal dimensionality, leads to better agreement with recent observational results.Comment: revised, new material added, 8 page

Bridging the gap? The role of transition advisers in the move from compulsory education

The quality and impartiality of careers advice has been in question for as long as it has been provided, with numerous studies (see Morris, 2004 for a summary of NfER research in this area) pointing to the efficacy of impartial guidance, but also pointing to gaps in provision for particular groups. It is possible to distinguish three areas of educational policy - although this is not exhaustive - which have had a clear effect on young people's experience of advice and guidance over recent years. The first area is in provision of careers advice itself. The second area is the 14-19 learning environment. Linked to this shift in the 14-19 environment is the third area, the impact of market-driven reforms starting with the Education Reform Act in 1988.</p

Active social location in schools: professional development for the whole school workforce?

The workforce in English schools has changed over recent years; there are more categories of staff to be found in English schools and the relative sizes of the categories have altered. Alongside these changes, the Every Child Matters reform programme implies the need to pay attention to the importance of all categories of staff to the welfare of children. However, there has not hitherto been an adequate characterisation of the nature of the practice of workers other than teachers . This paper attempts to characterise the position of school workers other than teachers to better understand the distinctive nature of their practice. We focus on Teaching Assistants, Caretakers and Lunchtime Supervisors as three groups which are sufficiently different to enable us to develop a richer theoretical account of identity in the school workforce than has hitherto been available. We have argued elsewhere (Coldron and Smith, 1999) that a teacher’s practice and his or her development of that practice can best be understood as a process of active social location. In this paper, we apply the same theoretical understanding of practice to the work identities of these three groups of school staff. By better understanding the identities that their different positions and associated resources make available, we aim to provide a richer picture and a way of thinking of the work identities of staff in school who are not teachers, one that is not colonised by the ways of thinking about the higher status teacher group.</p

A simplified, compact static shift register

Shift register was developed which uses only one D type flip-flop and improves packaging density by approximately 25% over the usual arrangement. Circuit is compromise between full master-slave arrangement and dynamic shift register, with limitation only of length of time that clock can be held high during new data entry

Influence of maneuverability on helicopter combat effectiveness

A computational procedure employing a stochastic learning method in conjunction with dynamic simulation of helicopter flight and weapon system operation was used to derive helicopter maneuvering strategies. The derived strategies maximize either survival or kill probability and are in the form of a feedback control based upon threat visual or warning system cues. Maneuverability parameters implicit in the strategy development include maximum longitudinal acceleration and deceleration, maximum sustained and transient load factor turn rate at forward speed, and maximum pedal turn rate and lateral acceleration at hover. Results are presented in terms of probability of skill for all combat initial conditions for two threat categories

Monitoring robot actions for error detection and recovery

Reliability is a serious problem in computer controlled robot systems. Although robots serve successfully in relatively simple applications such as painting and spot welding, their potential in areas such as automated assembly is hampered by programming problems. A program for assembling parts may be logically correct, execute correctly on a simulator, and even execute correctly on a robot most of the time, yet still fail unexpectedly in the face of real world uncertainties. Recovery from such errors is far more complicated than recovery from simple controller errors, since even expected errors can often manifest themselves in unexpected ways. Here, a novel approach is presented for improving robot reliability. Instead of anticipating errors, researchers use knowledge-based programming techniques so that the robot can autonomously exploit knowledge about its task and environment to detect and recover from failures. They describe preliminary experiment of a system that they designed and constructed

Factorization of completely bounded bilinear operators and injectivity

We characterize injectivity of von Neumann algebras in terms of factoring bilinear maps as products of linear maps.Comment: 32 pages. See also http://www.math.tamu.edu/~roger.smith/ preprints.htm