Most transactional memory (TM) research focused on multi-core processors, and others investigated at the clusters, leaving the area of non-uniform memory access (NUMA) system unexplored. The existing TM implementation...Most transactional memory (TM) research focused on multi-core processors, and others investigated at the clusters, leaving the area of non-uniform memory access (NUMA) system unexplored. The existing TM implementations made significant performance degradation on NUMA system because they ignored the slower remote memory access. To solve this problem, a latency-based conflict detection and a forecasting-based conflict prevention method were proposed. Using these techniques, the NUMA aware TM system was presented. By reducing the remote memory access and the abort rate of transaction, the experiment results show that the NUMA aware strategies present good practical TM performance on NUMA system.展开更多
For the longest time,peacemaking and peacekeeping were the only post-factum interventions to resolve armed conflicts usually related to a nation-state’s borders or territory.Peacebuilding has its origins in sociology...For the longest time,peacemaking and peacekeeping were the only post-factum interventions to resolve armed conflicts usually related to a nation-state’s borders or territory.Peacebuilding has its origins in sociology(Galtung,1969;1975)and is used today as a preferred concept in matters of conflict.However,this paper explores why peacebuilding,as the Secretary General of the United Nations advocates in A New Agenda for Peace,must become a nonlinear and contextual process that promotes the prevention of conflict and invites a transformative approach to addressing the linkages between peace,security,and climate.Furthermore,this paper advocates that peacebuilding grounded in social psychology and social anthropology will bring about transformative outcomes as it will build relationships at the community level and become a preventive tool to address incipient tensions within the community.Peacebuilding as social work will benefit the community and lay the necessary foundations for a sustainable future.Social workers are equipped to assess,analyze,and solve problems.Their capacity to do ongoing social diagnosis is a critical tool to prevent skirmishes degenerating into conflicts.Social work could be the much-needed resource to further develop theory and practice that contributes to active peacebuilding.展开更多
中国墙模型具有能够同时提供自主控制和强制控制的特性,因而被广泛应用于商业领域中,以防止有竞争关系的企业之间的信息流动而导致利益冲突.但是由于对读写约束过于严格,因而应用范围有限,特别是在数据泄漏防护的应用中未能发挥其优越性...中国墙模型具有能够同时提供自主控制和强制控制的特性,因而被广泛应用于商业领域中,以防止有竞争关系的企业之间的信息流动而导致利益冲突.但是由于对读写约束过于严格,因而应用范围有限,特别是在数据泄漏防护的应用中未能发挥其优越性.针对数据泄漏防护对信息流动的控制需求,从数据客体的角度出发,考虑中国墙模型中的利益冲突问题,提出了主动冲突关系的概念,将原来对信息双向流动的约束转换为对单向流动的约束.在此基础上,提出了一种可以实现数据主动泄漏防护的扩展中国墙模型ACWM(aggressive Chinese wall model),并给出了模型的形式化描述和相关定理的证明.分析表明,ACWM模型可以实现传统中国墙模型的安全目标,而约束条件更加灵活,可以实现数据泄漏防护的需求.展开更多
基金Projects(61003075, 61170261) supported by the National Natural Science Foundation of China
文摘Most transactional memory (TM) research focused on multi-core processors, and others investigated at the clusters, leaving the area of non-uniform memory access (NUMA) system unexplored. The existing TM implementations made significant performance degradation on NUMA system because they ignored the slower remote memory access. To solve this problem, a latency-based conflict detection and a forecasting-based conflict prevention method were proposed. Using these techniques, the NUMA aware TM system was presented. By reducing the remote memory access and the abort rate of transaction, the experiment results show that the NUMA aware strategies present good practical TM performance on NUMA system.
文摘For the longest time,peacemaking and peacekeeping were the only post-factum interventions to resolve armed conflicts usually related to a nation-state’s borders or territory.Peacebuilding has its origins in sociology(Galtung,1969;1975)and is used today as a preferred concept in matters of conflict.However,this paper explores why peacebuilding,as the Secretary General of the United Nations advocates in A New Agenda for Peace,must become a nonlinear and contextual process that promotes the prevention of conflict and invites a transformative approach to addressing the linkages between peace,security,and climate.Furthermore,this paper advocates that peacebuilding grounded in social psychology and social anthropology will bring about transformative outcomes as it will build relationships at the community level and become a preventive tool to address incipient tensions within the community.Peacebuilding as social work will benefit the community and lay the necessary foundations for a sustainable future.Social workers are equipped to assess,analyze,and solve problems.Their capacity to do ongoing social diagnosis is a critical tool to prevent skirmishes degenerating into conflicts.Social work could be the much-needed resource to further develop theory and practice that contributes to active peacebuilding.
文摘中国墙模型具有能够同时提供自主控制和强制控制的特性,因而被广泛应用于商业领域中,以防止有竞争关系的企业之间的信息流动而导致利益冲突.但是由于对读写约束过于严格,因而应用范围有限,特别是在数据泄漏防护的应用中未能发挥其优越性.针对数据泄漏防护对信息流动的控制需求,从数据客体的角度出发,考虑中国墙模型中的利益冲突问题,提出了主动冲突关系的概念,将原来对信息双向流动的约束转换为对单向流动的约束.在此基础上,提出了一种可以实现数据主动泄漏防护的扩展中国墙模型ACWM(aggressive Chinese wall model),并给出了模型的形式化描述和相关定理的证明.分析表明,ACWM模型可以实现传统中国墙模型的安全目标,而约束条件更加灵活,可以实现数据泄漏防护的需求.
