Dvaravati, Si Thep, and Wendan.
The aim of this article is to better define the historical position of Wendan (Land Zhenla), an 8th-century kingdom known from Chinese sources, which had a capital in northeastern Thailand. The material evidence from Thailand, primarily in the form of Buddhist boundary stones, will not yield a coherent story until it is studied more deeply, with careful attention to issues of chronology. Architectural ruins in the Angkor region show that temple building (in contrast to what some have previously thought) fell off dramatically in about the second quarter of the 8th century, consistent with the hypothesis that the area fell under the domination of Wendan. For evidence that Angkor-region craftsmen were taken north by Wendan, it is necessary to look at sculpture and monumental remains taken from or remaining in Si Thep, a city likely to have stood west of Wendan’s political center. Evidence from the Delta region (“Water Zhenla”), finally, dating from the second half of the 8th century, reveals contact with Si Thep in this period and also indicates that at least some of the craftsmen who worked on Mt. Kulen (probably beginning prior to Jayavarman II’s coronation in 802) were likely to have been brought from this region.
Le pays Khmer avant Angkor
Les trois periodes de l'histoire pre-angkoreenne du Cambodge, appelees par les Europeens, d'apres les annales dynastiques chinoise, periodes du Funan (des debuts au VIIe s.), du Zhenla ou Tchen-la (VIIe s.) et de la dislocation du Zhenla (VIIIe s.), sont imprecises puisqu'elles designent des royaumes en relation commerciale avec la Chine et ne couvrent pas l'ensemble du pays khmer. L'auteur tente ici d'apporter des precisions sur la realite de l'histoire pre-angkoreenne du pays khmer, alors visiblement compose d'une multitude de petits royaumes et principautes
State estimation for integrated vehicle dynamics control
This paper discusses a vehicle controller and a state estimator that was implemented and tested in a vehicle equipped with a combined braking and chassis control system to improve handling. The vehicle dynamics controller consists of a feed forward body roll compensation and a feedback stability controller. The estimator is based on a non-linear vehicle model combined with an extended Kalman filter. The Kalman filter is also connected to an algorithm, which estimates the tyre-road friction coefficient. The developed estimator was tested in a vehicle. Good results were achieved for normal and extreme driving manoeuvers.