Several problems arise among the existing LSB-based image steganographic schemes due to distortion in a stegoimage and limited payload capacity. Thus, a proposed scheme has been developed with the aims to help in improving the payload of the secret data at the same time retaining the quality of the stego-image produced within an acceptance threshold. This study has led to the modification of th...

This paper proposes the use of admission and traffic control schemes for real-time applications. The admission control scheme determines the admission of high-priority real-time applications such as voice and video streams in terms of their bandwidth utilization time (medium time), whereas the traffic control scheme maintains the communication quality of applications permitted admission by rest...

UMTS/WLAN integration offers considerable benefits for the users as well as for the mobile network. As soon as coverage is available, a mobile user should be able to switch seamlessly from the ubiquitous low bandwidth UMTS to a high bandwidth WLAN. This will improve his quality of service, but this also increases capacity in the cellular network. To be able to change between radio access techno...

The gateway discovery in hybrid network is considered as a critical and challenging task and with decreasing pause time and greater number of sources it becomes even more complex. Due to the scarcity of network resources in MANET, the efficient discovery of the gateway becomes a key issue in the design and development of future hybrid networks. In this paper the AODV reactive routing protocol i...

We investigate Wireless LAN hot-spots based on the IEEE 802.11b protocol, considering technical and economic issues of the Radio Resource Allocation. Firstly, we discuss how to model the trade-off between perceived QoS and paid price in the users’ request, so as to represent the users as choosing the most satisfactory allocation, determined by service requirements and willingness to pay. After ...

Image quality assessment (IQA) is a crucial technique in perceptual image/video coding, because it is not only a ruler for performance evaluation of coding algorithms but also a metric for ratio-distortion optimization in coding. In this paper, inspired by the fact that distortions of both global and local information influence the perceptual image quality, we propose a novel IQA method that in...

today service organizations operate in highly dynamic and competitive environment where improving performance depends on effective utilization of intangible assets. accordingly, this study investigated the intervening role of social capital in the effect of social media assimilation on the quality of organizational knowledge and innovational performance. this study has been done in a sample of ...

the increasing emphasis on supply chain management (scm) has led researchers to rethink models, constructs, and frameworks for quality management (qm) that have been developed for the field of operations management. in this paper, within the framework of a structural model we investigate how these two supply chain management-related quality practices (customer focus and supplier quality managem...

800x600 abstract background: nursing is arguably one of the most dangerous jobs. since nurses are the largest providers of health care services in the community, their quality of life should be desirable to provide the high - quality care to the patients . the aim of this study was to examine the quality of life and its related factors among nurses in kashan shahid-beheshti hospital during 2013...