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Vijay, Ritu
- A Comparative Study of Mobile Wireless Networks
Authors
1 School of Engineering and Technology, Jaipur National University, Jaipur, IN
2 Department of Computer Science and Electronics, Bansthali University, Rajasthan, IN
Source
Oriental Journal of Computer Science and Technology, Vol 4, No 2 (2011), Pagination: 387-392Abstract
As the coming generation is going to be the mobile communication technology Generation. If we talk about the communication, at present we are fully equipped with 2G and have started using 3G. But time is not so far when we deal with 4G and it's beyond mobile communication technology. In this paper we have just tried to present the brief overview and limitations of existing systems and how generation next mobile communication technology is going to start new evolution. The G Next revolution, we call it 4G. In this I have discuss the overview, features of 4G, its future vision and scope. This paper will help the new scholars to enhance their knowledge about the different mobile communication existing and G Next systems.Keywords
FDMA, TDMA, CDMA, GSM, OFDM, WiMax.Full Text
- Role of Metadata in Data Warehousing for Effective Business Support
Authors
1 School of Engineering and Technology, Jaipur National University, Jaipur, IN
2 Department of Computer Science and Electronics, Banasthali University, Rajasthan, IN
Source
Oriental Journal of Computer Science and Technology, Vol 4, No 2 (2011), Pagination: 435-438Abstract
Today large organizations are being served by different types of area processing and information systems. It is important to create an integrated repository of what these system contain and do it in order to use them collectively and effectively. The repository contains metadata of source systems effectively. The repository contains metadata of source systems data warehouse and also business data. Metadata, usually called data about data, is an important part. Metadata is supposed to be a helping hand to all co-workers in an organization that work directly or indirectly with the data warehouse. The main purpose of this paper is to determine through feedback from the business end user.
Keywords
Metadata, DSS, DW, ETL, OLAP.Full Text
- Wavelet Based Medical MRI Compression Using ROI And Comparing RGB And Ycbcr Color Spaces
Authors
Source
International Journal of Innovative Research and Development, Vol 2, No 5 (2013), Pagination:Abstract
Region Of Interest (ROI) coding is a feature provided by some modern image coding systems that allows to the compressor to assign higher priority to certain regions of the image (ROIs) over the rest of the image. After a preprocessing step remove the mean, select region of interest indvidualy in RGB, transform RGB to YCbCr color space, the DWT is applied and followed by bisection method include thresholding, the quantization, dequantization, the Inverse Discrete Wavelet Transform (IDWT), YCbCr to RGB transform of mean recovering. To obtain the best PSNR, encoding algorithm is used for compressing the input medical image in to three matrices and forward to DWT block a coresponding (m×n) vector containg the maximum possible run of zeros at its end. In the last step decoding algorithm is used to decompress the image using IDWT to get three matrices of medical image.
Keywords
Region of interest, MRI, RGB, YCbCr transform, Block-based DWT, Transform codingFull Text