We demonstrate a concept of potentially inexpensive sunlight-powered watersplitting reactors using a fixed Al-doped SrTiO 3 photocatalyst. A panel reactor filled with only a 1-mm-deep layer of water was capable of rapid release of product gas bubbles without forced convection. A flat panel reactor with 1 m 2 of lightaccepting area retained the intrinsic activity of the photocatalyst and achieved a solar-to-hydrogen energy conversion efficiency of 0.4% by water splitting under natural sunlight irradiation.

No abstract

No abstract

Early detection of anomalies is crucial to maintain high productivity at a re nery. For this purpose, we propose an anomaly detection system based on adaptive resonance theory (ART) for industrial plants. The feature of the system is that it has several ART systems applied to subsystems of the plant in order to narrow down the cause of the anomalies. This report presents our examination of online anomaly detection tests on whether or not the proposed system is applicable to a distillation tower system. The tests were conducted with experimental equipment of a distillation tower in Universiti Teknologi PETRONAS (UTP). In the tests, we carried out four cases of anomaly operation (e.g., valve sticking and tray upset) that would cause quality or yield losses in the product. By learning normal operation data, the proposed system could detect anomalies in all four cases, and no false positives were observed in normal operation. We also found that the system could narrow down the cause of the anomalies by using the results of each ART system, thereby demonstrating that the system is applicable for the distillation tower system.

The DVD is acknowledged as the image and information storage media for the next generation of video, music, and computer systems and also for a broad range of other applications. The market for DVDs has already taken off, and the DVD family is looked to as being a united system for image and information. Compatibility among DVD formats is essential for the 4.7-GB DVD-RAM. The key concept of this is large capacity without placing a burden on the readout system.