Grażyna Ślusarczyk

A Graph Representation of Subject's Time-State Space

Surveillance systems are currently the most developed branch of assisted living applications providing the disabled or elderly people with unprecedented security in their independent life. This paper presents a design of a telemedical surveillance system, where graph theory is used to describe subjects’ states. Patient’s states expressed by sets of medically-derived parameters and his or her daily activity (a behavioral pattern) are represented by attributed probabilistic graphs with indexed and labeled nodes. This representation provides high flexibility in a state and transient description as well as a reliable measure of behavior divergence, which is a basis for automatic alerting. The system is designed for the subject’s apartment and supports a localization-dependent definition of his or her usual and unusual behavior. The apartment topology is also represented in the form of a graph determining subject’s pathways and states. This approach has been found very flexible in all aspects of personalization, appropriate to work with the behavioral presumption set or with the auto-adaptive artificial intelligence recognition engine. Also the patient’s state, thanks to the semantic description may be easily extended or refined if necessary by adding new, complementary data capture methods.

Frequent Pattern Mining in a Design Supporting System

This paper deals with reasoning about designs using frequent pattern mining methods. It also describes a prototype system supporting design and reasoning, where graph theory is applied to the computational process. Searching a large database of solutions for frequently occurring patterns allows us both to retrieve solutions of similar design tasks and to evaluate newly created innovative solutions.

Hypergraph Grammars in hp-adaptive Finite Element Method☆

Abstract The paper presents the hypergraph grammar for modelling the hp-adaptive finite element method algorithm with rectangular elements. The finite element mesh is represented by a hypergraph. All mesh transformations are modelled by means of hypergraph grammar rules. These rules allow to generate the initial mesh, to assign values of polynomial order to the element nodes, to generate the matrix for each element, to solve the problem and to perform the hp-adaptation.

Designing floor-layouts with the assistance of curious agents

The paper deals with visual computational design in which emergence is a key to creativity. The presented framework for conceptual design uses shape grammars and curious agent assistants. The intelligent agents perceive the changing environment and emergent phenomena that occur in it. Interacting with each other and the designer they look for the most original and plausible solutions to a given design task. The approach is illustrated by the example of a designing floor-layouts.

A grammar-based multiagent system in dynamic design

Abstract This paper deals with the system of agents treated as a concurrent modular system, which is able to support the designer in solving complex design tasks. The behavior of design agents is modeled by sets of grammar rules. Each agent manages a graph grammar and a database of facts concerning the subtask for which it is responsible. The course of designing is determined by the interaction between cooperating specialized agents. The design context is expressed by the environment in which agents act and predicates describing design criteria. The organization, design methodology, and a semantic model of a grammar-based multiagent design system are presented. The notions of a valid design solution and a design solution consistent with the design criteria are also introduced. The proposed approach is illustrated by the example of designing a house estate.

Visual creative design with the assistance of curious agents

This paper presents the new framework for visual computational design in which emergence is a key to creativity. Visual shape grammar computations proceeded with the use of diagrams are situated in a design context indirectly through the designer working with the application or more explicitly through curious agents. Curiosity of intelligent agents is applied to search for novel and plausible design solutions. The approach is illustrated by designing decorative patterns.

Knowledge Representation for Human-Computer Interaction in a System Supporting Conceptual Design

This paper deals with the conceptual stage of the design process related to civil engineering. Different types of design knowledge representation essential in visual aspects of a human-computer dialogue are considered. They comprise designers drawings expressing forms, layouts and functionality of designed artifacts, internal graph-based data structures obtained automatically on the basis of these drawings and logic formulas extracted from the graph data structures. The reasoning mechanism based on the first-order logic enables the system to assess the compatibility of designs with specified requirements and constraints. The feedback given by the system along with visualizations of initial design ideas enforce the designers constructive visual perception and creativity. The presented approach is illustrated on the example of designing an indoor swimming pool.

Design Description Hypergraph Language

This paper deals with problems of knowledge-based decision support design systems. A new method of transformation the design knowledge into a computer internal representation is proposed. The presented approach is illustrated on examples of designing floor-layouts, where a layout internal representation is generated step by step during the design process. Such a representation in the form of a hypergraph is a data structure allowing for automatical processing of the design project. The prototype software to translate layouts into hypergraphs written in Java is used.

Dynamic Design with the Use of Intelligent Agents

In this paper ideas of the dynamic character of design are presented by using intelligent agents to conceptual design aided by computer. These ideas are illustrated by the application related to decorative art. Two cooperative curious agents are used to generate periodic patterns. Agents’ curiosity controls evaluation of their actions, specification of new aims and planning future behavior. The interaction between agents and the environment strongly determines the course of designing.

Ontological Approach to Design Reasoning with the Use of Many-Sorted First-Order Logic

This paper is a continuation and extension in developing the knowledge-based decision support design system (called HSSDR) which communicates with the designer via drawings. Graph-based modeling of conceptualization in the CAD process, which enables the system to automatically transform design drawings into appropriate graph-based data structures, is considered. Hierarchical graphs with bonds are proposed as a representation of designs. An ontological commitment between design conceptualization and internal representations of solutions, which enables us to capture intended design models, is described. Moreover, the first-order logic (FOL) of HSSDR is replaced by many-sorted FOL that makes it possible to define different sorts in specification of functions and predicates in semantics and design constraint verification.