Due to the increasing complexity of data warehouses , a centralized and declarative management of metadata is essential for data warehouse administration, maintenance and usage. Metadata are usually divided into technical and semantic metadata. Typically, current approaches only support subsets of these metadata types, such as data movement meta-data or multidimensional metadata for OLAP. In pa...

Multiple-input multiple-output (MIMO) scheme is an important tool to achieve a high data rate communication and higher signal to noise ratio (SNR). In order to facilitate the communication system design, understanding and modeling the channel is crucial. Different approaches are available for modeling the MIMO channel based on the required utilization that range between physical and analytical ...