Foveation-Based Error Resilience and Unequal Error Protection over Mobile Networks

By exploiting new human-machine interface techniques, such as visual eyetrackers, it should be possible to develop more efficient visual multimedia services associated with low bandwidth, dynamic channel adaptation and robust visual data transmission. In this paper, we introduce foveation-based error resilience and unequal error protection techniques over highly error-prone mobile networks. Each frame is spatially divided into foveated and background layers according to perceptual importance. Perceptual importance is determined either through an eye tracker or by manually selecting a region of interest. We attempt to improve reconstructed visual quality by maintaining the high visual source throughput of the foveated layer using foveation-based error resilience and error correction using a combination of turbo codes and ARQ (automatic reQuest). In order to alleviate the degradation of visual quality, a foveation based bitstream partitioning is developed. In an effort to increase the source throughput of the foveated layer, we develop unequal delay-constrained ARQ (automatic reQuest) and rate compatible punctured turbo codes where the punctual pattern of RCPC (rate compatible punctured convolutional) codes in H.223 Annex C is used. In the simulation, the visual quality is significantly increased in the area of interest using foveation-based error resilience and unequal error protection; (as much as 3 dB FPSNR (foveal peak signal to noise ratio) improvement) at 40% packet error rate. Over real-fading statistics measured in the downtown area of Austin, Texas, the visual quality is increased up to 1.5 dB in PSNR and 1.8 dB in FPSNR at a channel SNR of 5 dB.     

Is compulsive internet use related to sensitivity to reward and punishment,and impulsivity?

Aim of the present study was to examine whether the personality correlates sensitivity to reward and to punishment, and impulsivity predict compulsive internet use (CIU). Furthermore, the predictive value of these personality correlates was compared to the predictive value of factors relating to psychosocial wellbeing. The results showed that particularly rash spontaneous impulsivity predicts CIU and that this personality factor is more important than psychosocial wellbeing factors. Sensitivity to reward, which is supposed to play a role in craving processes associated with substance abuse and eating disorders, could not be related to CIU. The data suggest that internet users who are characterized by an impulsive personality feature, are less able to control their use of the internet, which makes them more vulnerable to develop CIU.     

修辞视角下的因特网站名称

当网络以难以想象的高速发展的时候,由于各行各业的人们加入网络语言逐渐形成了自己的风格。作为一种新兴的媒体语言,网络语言具有经济、直接、生动、活泼等特点。该文从修辞的视角对大量的网站名称实例进行分析,并介绍网站名称的构成特点、翻译及修辞效果。     

网络与政治:二元互动发展

网络与政治处于一种系统联系之中,二者的相互作用构成了它们之间的互动发展。一方面,在技术政治化和政治技术化的过程中网络推动政治的发展;另一方面,政治通过干预和控制网络技术促进网络的发展。     

网络安全与Internet防火墙

随着Internet的发展,越来越多的企业和个人加入其中,而网终安全成为最为突出的一个问题,防火墙是解决Internet安全问题最有效的方法。     

有线电视HFC网络嫁接宽带INTERNET浅析

随着人们对外界信息了解需求的增大。有线电视HFC嫁接Internet的各种技术也就应运而生。首先简单的介绍有线电视HFC的网络原理。然后从网络的设计、网络的规划着手介绍几种宽带技术。利用有线电视HFC网络嫁接宽带INTERNET真正实现有线电视网集宽带、语音、电视于一身的神奇功能,真正做到"三网融合"。     

Internet dependency and psychosocial maturity among college students

One salient impact of information technology on students' lives is the ever-increasing use of the Internet. Although there exist many reports in the media regarding the unhealthy Internet use among students, research is still limited and has mainly relied upon on-line self-selected reports on Internet dependency or “Internet addiction”. This paper attempts to look into the alleged Internet dependency within the Eriksonian psychosocial development framework. The results of a survey of the Internet use among 217 students in an Australian regional university are reported. The measures of patterns of the Internet use were correlated with that of psychosocial maturity and self-efficacy. The results showed that the Internet dependency seemed to be independent of the psychosocial maturity and the general perceived self-efficacy. A factor analysis extracted six factors from a set of 28 Internet experience-related questions and indicated that the Internet dependency could be of a multifaceted nature. The findings and their implications were discussed and a contextual perspective was proposed.     

移动互联网时代的终端产业发展趋势

随着全球进入移动互联网时代,移动终端产业正面临深刻变革。介绍了国际智能终端产业的现状,分析了我国终端产业面临的机遇、挑战,以及面向移动互联网的终端产业的发展趋势。     

电子商务中的虚拟现实技术应用

针对目前电子商务存在的不足，对虚拟现实在电子商务中的应用技术进行了研究。设计了一个适合虚拟商店的电子商店模型，研究了虚拟现实建模技术及实现中的关键技术和虚拟商品的网上发布技术等。     

基于MAS的RFID物联网数据集成中间件研究与实现

提出RFID数据集成中间件概念.为了不改变现有各数据库局部模式,提供各数据库的全局模式,将MAS和分布式数据技术结合,提出基于Agent的关系数据库访问技术的联邦模式虚拟集成法.该虚拟集成法基于本体构建分布式数据库;针对网络环境,基于CIAgent开发包研究设计分布式智能代理DIAgent,用KQML语言描述DIAgent间协作通信过程,由多个协作DIAgent构建GDBMS.实现了油田企业数据集成,系统运行稳定可靠.