The enantiotropic polymorphic phase transformation of di-indenoperylene (DIP) at 403 K has been structurally characterized, using single-crystal X-ray diffraction. Both the low temperature Rand the high-temperature β-phase have a herringbone-type structure, with the R-phase being triclinic with doubled unit cell volume compared to the monoclinic β-phase. In the latter, the molecules have a more upright orientation in the herringbone plane. The epitactic transformation from β-to R-phase involves strong shearing displacements as well as bending and torsional deformations of the DIP molecules.

Electron and hole transport is demonstrated on bulk crystals of the organic semiconductor 9,10‐diphenylanthracene (DPA). The high mobilities at room temperature for electrons (ca. 13 cm2 Vs–1) and holes (ca. 3.7 cm2 Vs–1) make DPA a prominent candidate for device applications. The hole mobility follows a bandlike transport at high temperatures (200K–400K) and a saturation behavior in the low‐temperature regime (see figure), the latter being discussed in the context of various transport models.

In the resource-based paradigm the interfaces through which technical systems, their coniponents and their environment interact are modelled as abstract resources, and each technical entity is characterized by the types and amounts of resources it supplies, consumes and uses. This intuitive model, derived in one application area, is shown to be in concordance with the design rationale of modular component syslems. A simple self-organizing configuring inference procedure for the resource-based paradigm, resource-balancing, with a description of the environment of the technical system as the requirement specification, is derived front the basic acceptance criterion for configurations. Five levels of knowledge are defined for this puradigm and introduced in a simple representation scheme which, through its inherent locality and mutuul isolation of component knowledge, allows efficient acquisition and maintenance of even large component knowledge bases. First experiences with the implementation and use of these ideas in the prototype shell COSMOS are reported. AI Topic: knowledge representation, inference, configuring Domain Area: modular component systems Language: CommonLISP + Frame Oriented Language KitStatus: field test of shell prototype, on-going research Effort: 3 PY Impact: novel basic model for the configuring task with a decisively improved maintainability of the knowledge base.

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A polymer-based sensor for low frequency acceleration detection is fabricated by using microinjection molding technologies. Finite Element simulations and characterization of the sensing functionality are done. Due to an out-of-plane acceleration a force is applied to a seismic mass (length and width each 3.2 mm, thickness 1 mm), which leads to a deformation of a connected plate with dimensions of 1 mm × 1 mm × 50 ?m. Thus, charge separation at the electrodes of integrated piezoelectric polyvinylidene fluoride (PVDF) copolymer sheets occur and can be measured as sensor signal. A charge sensitivity of 0.57 pC/g is determined which is in good agreement with the simulation results. A resonance frequency of 660 Hz was measured. Furthermore, the sensor concept as well as preparation technologies to assemble a compound structure containing piezoelectric layers and the system integration by micro injection molding are discussed. In addition, different bonding techniques for the assembly of the functional components are investigated and described