Per Christiansson

The thesis describes two numerical models by which load spectra for highway sections and loadeffect spectra for highway bridges are calculated. The models use input variables of both deterministic and non-deterministic, stochastic, nature, which are chosen so that their values can be rather easily estimated. Output from the load spectrum model is u...

This paper focuses on a lightweight ontology-based knowledge management system, which is a main component of IT-CODE, a Semantic Web based virtual workspace for enhancing the collaboration at an early building design stage. Technologies with respect to de facto standards that are proposed by industry group W3C are implemented to develop this knowle...

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The paper focuses on knowledge transfer and learning based on experiences from developing and carry- ing through master courses in Industrial IT (MII) and civil engineering at Aalborg University and 25 years of teaching experiences within the field. In the MII the students are recruited from industry to follow a 3 year 1/2 time national open educat...

Advanced Information Technology today gives us the opportunity to implement sophisticated distributed systems for collaborative design. Persons with different interests and competencies in the building process such as architects, installation engineers, structural engineers, clients, and builders can all at least theoretically be brought together i...

Virtual Innovation in Construction (VIC) is a project aiming to develop an Information and Communication Technology (ICT) supported methodology VIC-MET, to involve building end-users in a creative innovation process together with building designers, and to capture and formulate end-user needs and requirements on buildings and their functionality. T...

Virtual models have in recent years proven their worth in practice in building design. Today, virtual models of a complete building project are often created before the project is carried out in practice. The immediate advantages of this new working process are great; it reduces the number of errors, it gives a better production basis, and it impro...

We are facing a probable great change in the way we carry through design in future ICT supported environments. The main driving forces are the digitalization of information handling leading to a paramount paradigm shift when information storage and access media are separated, building process and product systems are formalized in digital models, us...

There is a need to develop new information and communication technology (ICT) systems with better support of the contractor's working practice in order to gain more advantages from the virtual models created during the design of buildings. For this reason, a Contextual Design of a prototype (an early example) of an ICT system was carried out to ide...

The paper discusses design and use of distributed learning systems. Examples and experiences from ongoing courses are presented. Distributed learning is defined and put into the context of tomorrows learning environments and the project and problem based learning methodology used at Aalborg University. The requirements and properties of distributed...

During the late years there has been an ever-increasing focus on the possibilities to change the building process to raise quality on the final building products as well as the activities of actors involved in the building process. One reason for this interest is the new opportunities evolving due to introduction of advanced information and communi...

This paper summarizes experiences from the process of implementation of ICT-based systems for resource management in small construction companies. The initial decision process, system requirements specification and integration, education and staff training, and end user experiences were followed in a number of small and medium sized enterprises in...

The paper presents structures of the learning domains of building informatics exemplified with experiences from building management civil engineering and open education in Industrial IT at Aalborg University. The courses cover areas such as; object oriented programming and relational database design, human computer interface, user environment desig...

This handbook provides an overview of DIVERCITY, a virtual toolkit for construction briefing, design and management.

We have for a few decades been changing paradigm with regard to information handling. The traditional paper based information storage and presentation medium is substituted and complemented with digital storage accessible for reading and updating at optional time and place. Digital models of our reality and also non-physical objects are accessed fr...

Location and time independent interaction and collaboration among the multidisciplinary competencies of building industry at early design stage highly influence the quality of final building products. A cross-platform IT supported virtual workspace is therefore necessary. This semantic web based distributed virtual workspace will be built on meta-s...

Construction projects involve a large number of both direct stakeholders (clients, professional teams, contractors, etc.) and indirect stakeholders (local authorities, residents, workers, etc.). Current methods of communicating building design information can lead to several types of difficulties (e.g. incomplete under- standing of the planned cons...

The paper summarises experiences from the last decade of using Information and Communication Technology (ICT) tools for collaboration over local networks and Internet. An overview is given over how the collaboration tools have developed and which functions they can support during Internet supported collaboration. The collaboration can take place at...

The concept of Intelligent Building was established 1982 by AT&T. The Informart building was erected in Dallas to demonstrate how advanced IT from different suppliers could be used in the intelligent building. Now almost 20 years later industry and researchers again starts to talk about new services in the intelligent and responsive buildings and d...

The paper accounts experiences, and analyses ongoing open IT supported education's at Aalborg University. The requirements and properties of distributed learning systems are explained as well as available IT-tools support and requirements on underlying application and user models. Pedagogical models are developed to support project organised proble...

The paper discusses properties of the future digital Virtual Buildings from client, design, construction and operation&maintenance perspectives. In this context we define a Virtual Building as "a formalized digital description of an existing or planned building which can be used to fully simulate and communicate the behavior of the real building in...

Today most of the information we produce is stored digitally. We are slowly forced to leave behind us thinking about information as something stored in physical containers as books, drawings etc. We make i t possible to dynamically create logical containers of information on the fly. The paper focuses on how we in the future can aggregate, classify...

The paper describes how technical building maintenance in the future can be effectively communicated using Internet services. The research and development is done together with the potential end users of the system (9 large building operations and maintenance firms in Sweden). The national Swedish SERFIN , Maintenance Experience Communication on In...

Computers have made it possible to save and analyze tremendous amount of data and it is hard for users to find and use the relevant parts of these data. One example is all the information in the World-Wide-Web on the Internet. To help the users in their task of achieving relevant information, we must construct a user model artifact that do most of...

In the existing KBS-MEDIA [knowledgebased systems-media) environment demonstration systems (demonstrators) are built to support different phases in the building process—City Advisor, Material and Vendor Information, Building Maintenance etc. In this environment new concepts and tools are defined and tried out in connection with using, building and...

Hypotheses and explanation models are put forward about the future global structure, manipulation and transfer of knowledge. The so called Dynamic Knowledge Nets, DKN, are defined and used to explain changes for the next generation of computerized communication and knowledge handling systems. More and more powerful tools become available to model a...

The paper describes how modern information technology may impact the properties of future building maintenance systems. Examples have been picked from ongoing research under the heading KBS-MEDIA LAB, knowledge based systems media lab

Examples are given of how modern information technology may have an impact on the way we build and use computerised models for different applications. The knowledge-based systems - media group of projects is described. These projects are aimed at integrating advanced software techniques with new distribution and storage media. The "hyperdocuments'...

An introduction to knowledge based systems is presented to point out possibilities and limitations of the new software and hardware technology now beginning to be available. A pilot study on the use of an expert system shell (the ES/P Advisor), is briefly discussed. A part of the Swedish concrete building code was implemented in the expert system s...

The ability of steel columns to sustain increased column loads for a short period is discussed. By means of an analytical solution of the lateral deflection of a simplified two-element column, diagrams are constructed from which limiting amplitudes of the column load and the corresponding durations may be selected. A refined numerical solution to t...

How can we specify user requirements for and structure new Virtual Reality, VR, based collaboration environments with rather limited knowledge about the future? The paper puts the development of VR and collaboration/communication support in perspective. Aspects are put forward on properties and structure of the next generation networked virtual col...

We have now during 3 decades worked hard within R&D and practice to define, design and implement Virtual Building models to support the entire life cycle of a building and to support experience capture and input to new projects. The Cambridge UK Building Design System was an early version of a sys- tem to handle rather formalized building design in...

The systems we are formulating today may provide us with dramatically better communication tools as communication rooms, personal "telescreens", and virtual realities. Behind the system interfaces dwell more and more capable knowledge representations which are closely related to pertinent search strategies. What are the implications of the mutual i...

During recent years there has been an ever-increasing focus on the possibilities to change the building process to raise quality on the final building products as well as on the activities of actors involved in the building process. One reason for this interest is the new opportunities evolving due to the broad introduc- tion of advanced informatio...

Virtual models have in recent years proven their worth in practice relating to building design. Today virtual models of the complete project are created before the project is carried out in practice. The immediate advantages of this are great; it introduces fewer errors, gives a better production basis, improved clarity and enhanced communication m...

As early as in 1995 it was stated that automatic identification of objects using RFID was a promis- ing technology for the construction industry. However, 13 years later the applications of RFID in the con- struction industry are rare and mostly used in prototype projects or used for theft prevention and access control. Recently maintenance applica...

In the paper are given fundamental support to high level structuring and modelling of the building process. The concept of a knowledge node is explained and demonstrated in ongoing research projects together with industry. The enabling technologies accounted for are rich user interfaces in the form of multimedia, the World Wide Web, relational data...

TV SAMMANFATTNING Projektet har varit inriktat på förvaltningsskedet i byggprocessen, och har analyserat och do-kumenterat hur dagens "traditionellt utformade" ritningar, beskrivningar och föreskrifter etc. kan utnyttjas med tillgänglig informationsteknologi i den tekniska förvaltningen och uthyr-ning samt hur avancerad informationsteknologi (IT) k...

Today most of the information we produce is stored digitally. We are slowly forced to leave behind us thinking about information as something stored in physical containers as books, drawings etc. We make it possible to dynamically create logical containers of information on the fly. The paper focuses on how we in the future can aggregate, classify...

The article presents some viewpoints on data structures which may mirror the building process and development of integrated computer aided design systems. The emphasis is upon the necessity to find a sufficiently valid general approach to system development in order to meet the fast evolution within the field and the demand for development strategi...

The International Council for Building research studies and documentation (CIB) working commission W78 Integrated Computer-Aided Design conducted a study to develop a catalog of integrated computer-aided design systems addressing development of integrated computer-aided building design systems. The study encompassed two phases: Survey of existing s...

A description of the department, equipment, research projects and education

It is now vital to aim at formulating computer system modules that possess a high ability to adapt their behavior to fundamental human values and a complex and unstandardized (not uniform) building process but at the same time put constraints on them so that we don't end up with a confusion of computerized routines hard to access, control and under...

During the last few years there has been an increasing interest in the Nordic countries concerning effective use of computer resources in the building process. Swedish and Nordic research and development within CAAD and adjoining areas is briefly accounted for to give a flavor of ongoing and planned activities. A Nordic Action Program for promoting...

The paper describes and exemplifies how modern information technology may impact the properties of future building information systems. Examples have been picked from ongoing research under the heading KBS-MEDIA LAB, Knowledge based systems media lab

The paper presents views and ideas on how building models can be build and on their properties as well as example on available software. Examples are also given from projects carried through in the KBS-MEDIA environment at Lund University where demonstrators have been built to support different phases in the building process: Building maintenance;...

A short description of the KBS-MEDIA, knowledge based systems - media project advanced software

A status report on Computer Aided Design in Sweden, since 1986