This study addresses the link between social media use and pro-environmental civic participation considering the moderating effect of social media affordances (public realm) on one hand, and lifestyle behaviors and cl...This study addresses the link between social media use and pro-environmental civic participation considering the moderating effect of social media affordances (public realm) on one hand, and lifestyle behaviors and climate change experiences (personal realm) on the other. We combine communication theory and behavioral models and using a sample of USA individuals (N = 7225) based on the American Trends Panel to predict variations in pro-environmental behavior. We show that social networks rather than information are more effective in predicting pro-environmental behavior. Moreover, a pro-environmental lifestyle as well as climate change experiences at the community level increase the likelihood for pro-environmental participation. However, affordances related to socioeconomic variations generate variations to pro-environmental civic participation. We conclude that in order to capture the depth of pro-environmental civic participation, it is necessary to theoretically and empirically bridge between private and public expressions of pro-environmental awareness.展开更多
Accelerating methods are used to enhance TCP performance over satellite links by employing Performance Enhancement Proxies (PEPs). However, providing a secure connection through the PEPs seems to be impossible. In thi...Accelerating methods are used to enhance TCP performance over satellite links by employing Performance Enhancement Proxies (PEPs). However, providing a secure connection through the PEPs seems to be impossible. In this paper an appropriate method is proposed in order to provide an accelerated secure E2E connection. We show an efficient secure three-party protocol, based on public key infrastructure (PKI), which provides security against spiteful adversaries. Our construction is based on applying asymmetric cryptography techniques to the original IKE protocol. Security protocols use cryptography to set up private communication channels on an insecure network. Many protocols contain flaws, and because security goals are seldom specified in detail, we cannot be certain what constitute a flaw. Proofing security properties is essential for the development of secure protocol. We give a logic analysis of the proposed protocol with the BAN-logic and discuss the security of the protocol. The result indicates that the protocol is correct and satisfies the security requirements of Internet key exchange. Based on the results of this preliminary analysis, we have implemented a prototype of our security protocol and evaluated its performance and checked safety properties of security protocol, and the results show that the protocol is robust and safe against major security threats.展开更多
应急无线通信指挥系统采用专网建设和公网使用相融合、固定基站和移动基站部署相结合的建设模式,旨在解决固定场所和应急现场的全域覆盖,在应急管理部门日常和应急情况下,满足无线通信网的通信和指挥需求。其中,专网通信采用370 MHz警...应急无线通信指挥系统采用专网建设和公网使用相融合、固定基站和移动基站部署相结合的建设模式,旨在解决固定场所和应急现场的全域覆盖,在应急管理部门日常和应急情况下,满足无线通信网的通信和指挥需求。其中,专网通信采用370 MHz警用数字集群(Police Digital Trunking,PDT)专用数字集群通信制式,固定基站完成大区域薄覆盖,移动基站实现应急现场点覆盖,公网通信依托运营商的公共通信网络,采用较低成本的公网集群对讲(PTT Over Cellular,PoC)扩展服务实现广域覆盖。公网通信和专网通信有机融合,互联互通,满足应急管理部门的无线通信需求,降低了系统建设成本,增强了专网应用的灵活性和安全性。展开更多
随着电力系统的智能化转型,输配电实时监测与控制的需求日益增长,通信技术在此过程中扮演着重要角色。文章详细分析公网通用分组无线服务(General Packet Radio Service,GPRS)、5G通信技术以及无线专网在输配电监测与控制中的应用,并探...随着电力系统的智能化转型,输配电实时监测与控制的需求日益增长,通信技术在此过程中扮演着重要角色。文章详细分析公网通用分组无线服务(General Packet Radio Service,GPRS)、5G通信技术以及无线专网在输配电监测与控制中的应用,并探讨这些技术存在的局限性,为电力系统的智能化转型提供坚实的理论支撑,确保电网运营的可靠性、安全性及高效性。展开更多
文摘This study addresses the link between social media use and pro-environmental civic participation considering the moderating effect of social media affordances (public realm) on one hand, and lifestyle behaviors and climate change experiences (personal realm) on the other. We combine communication theory and behavioral models and using a sample of USA individuals (N = 7225) based on the American Trends Panel to predict variations in pro-environmental behavior. We show that social networks rather than information are more effective in predicting pro-environmental behavior. Moreover, a pro-environmental lifestyle as well as climate change experiences at the community level increase the likelihood for pro-environmental participation. However, affordances related to socioeconomic variations generate variations to pro-environmental civic participation. We conclude that in order to capture the depth of pro-environmental civic participation, it is necessary to theoretically and empirically bridge between private and public expressions of pro-environmental awareness.
文摘Accelerating methods are used to enhance TCP performance over satellite links by employing Performance Enhancement Proxies (PEPs). However, providing a secure connection through the PEPs seems to be impossible. In this paper an appropriate method is proposed in order to provide an accelerated secure E2E connection. We show an efficient secure three-party protocol, based on public key infrastructure (PKI), which provides security against spiteful adversaries. Our construction is based on applying asymmetric cryptography techniques to the original IKE protocol. Security protocols use cryptography to set up private communication channels on an insecure network. Many protocols contain flaws, and because security goals are seldom specified in detail, we cannot be certain what constitute a flaw. Proofing security properties is essential for the development of secure protocol. We give a logic analysis of the proposed protocol with the BAN-logic and discuss the security of the protocol. The result indicates that the protocol is correct and satisfies the security requirements of Internet key exchange. Based on the results of this preliminary analysis, we have implemented a prototype of our security protocol and evaluated its performance and checked safety properties of security protocol, and the results show that the protocol is robust and safe against major security threats.
文摘应急无线通信指挥系统采用专网建设和公网使用相融合、固定基站和移动基站部署相结合的建设模式,旨在解决固定场所和应急现场的全域覆盖,在应急管理部门日常和应急情况下,满足无线通信网的通信和指挥需求。其中,专网通信采用370 MHz警用数字集群(Police Digital Trunking,PDT)专用数字集群通信制式,固定基站完成大区域薄覆盖,移动基站实现应急现场点覆盖,公网通信依托运营商的公共通信网络,采用较低成本的公网集群对讲(PTT Over Cellular,PoC)扩展服务实现广域覆盖。公网通信和专网通信有机融合,互联互通,满足应急管理部门的无线通信需求,降低了系统建设成本,增强了专网应用的灵活性和安全性。
文摘随着电力系统的智能化转型,输配电实时监测与控制的需求日益增长,通信技术在此过程中扮演着重要角色。文章详细分析公网通用分组无线服务(General Packet Radio Service,GPRS)、5G通信技术以及无线专网在输配电监测与控制中的应用,并探讨这些技术存在的局限性,为电力系统的智能化转型提供坚实的理论支撑,确保电网运营的可靠性、安全性及高效性。
