iSatTV:支持交互式数字卫星电视应用的通信系统

交互电视需要一条回传通道以将数据从用户端发送到系统前端。有线电视公司采用有线电视系统作为回传通道；而直播系统运营商通常采用拨号或者手机网络等地面系统，这就不可避免地导致系统复杂化且价格昂贵。为解决通过卫星回传窄带数据的问题，Newtec开发出了该革命性的低成本解决方案以支持交互式电视服务。成本的降低是通过采用连续封装调制以及高效率信道编码技术而获得的。该系统名为iSatTV，遵循SATMODE技术规范，并刚成为新的欧洲标准。     

Six years children’s use of a neighbourhood

Journal of Housing and the Built Environment -     

Solving misfits in ERP implementations by SMEs

The gap between the organizational needs and the extent to which an ‘off‐the‐shelf’ enterprise resource planning (ERP) system can meet these is called a misfit. A framework is developed to distinguish actual from perceived misfits. This is used to analyse the ERP implementation at four small‐sized and medium‐sized enterprises. The results show that they prefer to adjust the ERP system to their business processes when needed but often unnecessarily change the system to solve perceived misfits. The framework is a first step to prevent this unnecessary work in the future.     

Preparation of Zinc Titanate Thin Films by Low-Pressure Metalorganic Chemical Vapor Deposition

Homogeneous thin films of zinc titanate have been successfully prepared on Si(100) wafers by depositing a film of zinc and titanium oxides (ZnO-TiO₂) by low-pressure metalorganic chemical vapor deposition (MOCVD), followed by an annealing treatment. The precursors used for the deposition were diethylzinc (DEZ), tetraisopropoxide titanium (TPT), and water. By performing the deposition at temperatures between 140 and 350C, the stoichiometry of the as-deposited films could be effectively controlled over Zn/Ti ratios between 0.5 and 2.5, which cover the composition of various zinc titanate phases identified in the literature. The as-deposited ZnO-TiO₂ films are amorphous, and possess a fairly smooth surface. XPS and SIMS analysis showed that the composition of these films is uniform over the wafer as well as through the films bulk. An annealing treatment of the as-deposited films at high temperature     

IQC‐synthesis with general dynamic multipliers

Analogously to the existing μ‐synthesis tools, we propose an alternative algorithm for the systematic design of robust controllers based on an iteration of standard nominal controller synthesis and integral quadratic constraint (IQC) analysis with general dynamic multipliers. The suggested algorithm enables us to perform robust controller synthesis for a significantly larger class of uncertainties if compared with the existing methods. Indeed, while the classical approaches are restricted to the use of real/complex time invariant or arbitrarily fast time‐varying parametric uncertainties, the IQC framework also offers, for example, the possibility to efficiently handle sector‐bounded and slope restricted nonlinearities or time‐varying parametric uncertainties and uncertain time‐varying time‐delays, both with bounds on the rate‐of‐variation. Secondly, in contrast to the classical approaches, the proposed techniques completely avoid gridding and curve‐fitting. We present new insights that allow us to reformulate the robust IQC analysis LMIs into a standard quadratic performance problem. This enables us to generate suitable initial conditions for each subsequent iteration step. Depending on the size of the problem, this can significantly speed up the synthesis process. The results are illustrated by means of two numerical examples. Copyright © 2013 John Wiley & Sons, Ltd.     

Text-line examination for document forgery detection

In this paper, an approach for forgery detection using text-line information is presented. In questioned document examination, text-line rotation and alignment can be important clues for detecting tampered documents. Measuring and detecting such mis-rotations and mis-alignments are a cumbersome task. Therefore, an automated approach for verification of documents based on these two text-line features is proposed in this paper. An in-depth evaluation of the proposed methods shows its usefulness in the context of document security with an area under the ROC curve (AUC) score of AUC=0.89. The automatic nature of the approach allows the presented methods to be used in high-volume environments.