IKS—Concept and implementation of an object-oriented framework for image processing

This paper describes the concept of an Iconic Kernel System (IKS^PFH)—a general software toolbox allowing image-processing algorithms to be implemented independently of computer hardware and operating systems. Following a strict object-oriented design philosophy, it provides a basic set of data structures and operations from which the application-specific software environments can be built. Special attention has been paid to the incorporation of already existing software into object-oriented environments, and to the integration of general classes of user interface systems. The concept has been implemented as a working prototype using several programming languages in a DEC-VAX/VMS environment.     

Vacuolar (Storage) Proteins of Cocoa Seeds and their Degradation during Germination and Fermentation

Investigations of proteolysis during anaerobic cocoa seed incubation have been extended by disc and SDS-gel electrophoretic protein analysis. Two protein bands (2.6 × 10⁴ and 4.4 × 10⁴ Dalton) were found to be vacuolar storage proteins, which accumulated during seed ripening (90 to 160 days after pollination) and which were specifically utilised during germination. Although the storage proteins are poorly soluble at pH 3.5–4.5, proteolysis during incubation of acetone dry powders is highest in this pH range. All proteins are digested at 50°C, pH 4.5. During seed incubation at 50°C, pH 4.5, however, the storage proteins are degraded preferentially although the cells are dead at 50°C. This degradation is increased by preincubation at 40°C instead of 50°C. The results are discussed in the light of structural peculiarities in the seed tissue and the possible role of specific endopeptidases and peptides in the formation of flavour precursors during fermentation.     

Potential and limits of functional modelling in the CAD process

This paper gives a survey of the beginning and newest computer-aided functional modelling by German researchers. The basic principles of functional modelling are established and a representative function model is illustrated by the example of an emergency power unit. Some important methods for computer-aided modelling according to the function model are explained in detail. Following this the limits of functional modelling are outlined by describing the working arrangements of working principles using a flowchart representation of the function structure.     

Thermal dissociation of urethanes studied by FTIR spectroscopy

The thermal dissociation of urethane groups has been studied by FTIR spectroscopy depending on the type of diisocyanate, the structure of the hard segment and the composition of polyurethane. Independent of the composition and the structure, the dissociation started between 150 and 160°C. Consequently, the dissociation sets in at temperatures below the melting temperature of the model hard segments, i.e. already in the solid state. The NCO absorption band reaches its maximum intensity between 180 and 190°C. This result opposes the references in literature suggesting a four-centre reaction for transurethanization.     

Analyse des Erdbeeraromas - Quantifizierung der flüchtigen Komponenten in Kulturerdbeervarietäten und der Walderdbeere

The volatile components of thirteen strawberry varieties and of a wild strawberry were evaluated in the freon-extract of fresh and frozen fruits. With the aid of GC/MS about 120 volatile substances could be identified. The determination of the substantial sensory qualities resulted from AEDA with sniffing technique. In this way 17 key compounds could be attached. The analysis of the key compounds point out significient variety differences.     

Nondeterminism and boolean operations in pda's

There are nondeterministic context-free languages that cannot be expressed as a Boolean formula over deterministic context-free languages. The closure of the context-free languages under intersection does not yield closure under complementation.