MYCIN was the first large expert system to perform at the level of a human expert and to provide users with an explanation of its reasoning. Most expert systems developed since MYCIN have used MYCIN as a benchmark to define an expert system. Moreover, the techniques developed for MYCIN have become widely available in the various small expert system building tools. MYCIN was developed at Stanfor...

The first phase of the seismically excited base-isolated benchmark building was received well by the structural control community, culminating in the March 2006 journal special issue. The special issue contained contributions from over dozen participants world-wide. While the focus of the Phase I effort was on linear isolation systems, Phase II attempts to galvanize research efforts on control ...

Sample controllers for a three-dimensional smart base-isolated building benchmark problem with linear and frictional isolation system are presented in this paper. A Kalman filter is used to estimate the states based on absolute acceleration measurements. Input filters are used to better inform the controller of the spectral content of the earthquake excitations. A reduced order control-oriented...

Research on e-learner community building has attracted much attention for its effectiveness in sharing the learning experience and resources among geographically dispersed e-learners. While collaborative filtering proves its success as one of the most efficient methods in finding similar users in e-commerce domain, it does meet special challenges in e-learning areas. This paper incorporates mul...

In order to ensure the survival of building structures during earthquake periods, induced vibrations have to be mitigated. In this regard, semi-active control of smart structures using magneto-rheological dampers is becoming an emerging technology. Improvements on vibration reduction are foreshadowed when the dampers are installed at critical locations on the building structure. In this paper, ...

The American NEES Consortium Inc. (NEESinc) has performed a seismic research project around an uniaxial shaking table test on a structure representing a full-scale vertical slice of a 7-story reinforced concrete wall building. This paper deals with the numerical strategy adopted in the laboratory 3S-R for a ‘‘blind’’ simulation of the non linear behaviour of the specimen. Multifiber Timoshenko ...

——Magnetorheological (MR) dampers are devices that can be used for vibration reduction in structures. However, to use these devices in an effective way, a precise modeling is required. In this sense, in this paper we consider a modied parameter identication method of large-scale magnetorheological dampers which are represented using the normalized BoucWen model. The main benet of the propose...

Control strategy based on fuzzy algorithm is presented for response reduction of the seismically excited base-isolated building, which is an eight story base isolated non-linear building similar to existing buildings in Los Angeles, California. When a control method based on fuzzy algorithm to a structure is used for vibration reduction, it has inherent robustness, easiness to treat the uncerta...

Most control techniques in the structural engineering literature are aimed at improving performance of the primary structural system, but may have limited or even adverse effect on nonstructural components during strong seismic events. In this paper, we emphasize nonstructural performance using an active controller with a cubic nonlinearity. The controller is optimized based on the frequency re...