An Extended Comparator Hypothesis Account of Superconditioning.

Three conditioned taste aversion experiments with rats investigated superconditioning. In each experiment, alternate exposures of 2 flavor compounds with a common element (i.e., AB/AS) were administered to establish an inhibitory relationship between the 2 unique elements, B and S, and prior to testing, S was paired with lithium chloride (LiCl). In Experiment 1, pairings of a neutral cue (X) with S in compound with B after the AB/AS exposures resulted in superconditioning between X and S. Extinction of the common element (A) just before the S-LiCl pairing attenuated both the inhibitory relationship between B and S (Experiment 2) and superconditioning between X and S (Experiment 3). These observations suggest that superconditioning consists of enhanced performance rather than enhanced associative acquisition. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Effect of deformation conditions on the transformation of micro-alloyed medium-carbon forging steels

The CCT diagrams of three medium-carbon steels without and with microalloying by vanadium and titanium were constructed by applying direct cooling of as-deformed austenite. Deformation parameters corresponding to those of industrial forging were varied with a laboratory simulation technique by using the plane strain hot compression test. The effect of microalloying, deformation, and deformation temperature on the amount of structural substituents was quantified. For practical application of the study the as-forged controlled cooling conditions were determined to achieve the desired bainite-free ferritic-pearlitic microstructure with beneficial mechanical properties.     

Beckmann's Studio Computers Specified for Early Computer Art

When the pioneers of computer art started to produce their works by programming mainframes, using plotters for output, the Austrian sculptor Otto Beckmann took a different path. He used a special computer constructed by his son Oskar Beckmann. This article describes the technical context of early computer art, Beckmann's interdisciplinary team ars intermedia, and the development of nonconventional studio computers.     

Grain coarsening in hot deformed austenitic Cr-Ni steel

Simulation of forging of Nb-stabilised Cr-Ni steel using a hot deformation simulator. Modelling of various courses of temperature in between and after deformation steps. Assessment of the effects of various soaking conditions on grain growth. Evaluation of recrystallisation and grain growth characteristics by quantitative metallography.     

Calculation of the temperature distribution in dieless drawing

Dieless drawing is an example of flexible metal forming processes. The investigation of the main process parameters and their interdependence is the prerequisite for the deliberate choice of input parameters to get the desired quality of the workpiece. Drawing force, drawing velocity, and temperature are the main control parameters. But only the temperature can be influenced locally whereas the force and the velocity can be adjusted only globally. Because of this special importance of the temperature analytical and numerical models for the temperature distribution along the deformation zone have been developed.     

Polyketones containing indane structure elements

Summary Polyketones with indane structure elements were prepared by Friedel-Crafts polycondensation in three different reaction media. Only oligomers or insoluble material could be obtained, probably due to a side reaction of the indane ring, which leads to crosslinking at high conversion. The oligomers are soluble in common organic solvents such as THF and CHCl₃. Melting points, glass transition temperatures, and thermal stability of the oligomers were determined.     

A framework for controlling model-based diagnosis systems with multiple actions

In recent years reasoning about structure and function of physical systems for the purpose of diagnosis has seen a dramatic increase in activities. New exciting results concerning modelling issues, diagnostic inference patterns and inferential power have emerged. A state of the art diagnosis agent now has a considerable toolset at hand. A main obstacle for building large diagnosis systems, however, remains. How can we controlwhen to usewhich inference pattern or representation? We argue that the actions available to a diagnosis agent can be understood in terms of change ofworking hypotheses. The control problem then becomes a belief revision problem: when to adopt or drop beliefs. Our approach proceeds in two steps. First, we adopt the principle of informational economy from Gärdenfors, Knowledge in Flux (MIT Press, 1988) as kind of a law of inertia for diagnostic processes, that helps us identify candidates for revised belief states. In a second step we employ specificdiagnostic knowledge to actually choose the next belief state. We demonstrate the use of our concepts on an example in the domain of ballast tank systems as e.g. used in offshore plants.