基于网络测量系统的SYNFlooding攻击防御机制

探索了SYN Flooding攻击的特征,提出了判断攻击发生的关键指标。介绍了网络测量系统的架构,详细阐述了具有服务保护与攻击消除功能的检测方法、攻击源追踪方法。最后分别给出了验证检测机制和追踪机制的实验与结果。     

The Economic Impacts of a Terrorist Attack on the U.S. Commercial Aviation System

We use data on air passenger travel expenditures per passenger as well as statistical analysis of the air traffic lost for the two-year aftermath of the September 11, 2001, attacks to estimate direct demand losses for air transportation services. These are used along with a national input-output model to assess the full costs of these losses. Depending on assumptions made, the full losses to the U.S. economy were between $214.3 and $420.5 billion. These estimates are similar to those from other studies of such an event, and suggest that the high costs of effective countermeasures may be justified.     

Do terrorist attacks affect ethnic discrimination in the labour market? Evidence from two randomized field experiments

Terrorist attacks are known to influence public opinion. But do they also change behaviour? We address this question by comparing the results of two identical randomized field experiments on ethnic discrimination in hiring that we conducted in Oslo. The first experiment was conducted before the 2011 terrorist attacks in Norway; the second experiment was conducted after the attacks. In both experiments, applicants with a typical Pakistani name were significantly less likely to get a job interview compared to those with a typical Norwegian name. But the ethnic gap in call‐back rates were very similar in the two experiments. Thus, Pakistanis in Norway still experienced the same level of discrimination, despite claims that Norwegians have become more positive about migrants after the far‐right, anti‐migrant terrorist attacks of 2011.     

Should Cities Invest in Sheltering‐in‐Place Measures Against Chlorine Truck Attacks by Terrorists?

After an intentional release of chlorine in an office district, public responses such as sheltering‐in‐place could save many lives if rapid enough. However, previous work does not estimate how fast and effective such responses would be for several possible investments in attack detection, public alert, and building ventilation, nor whether such measures would be cost effective. We estimate public response times with investment options in place, and resulting changes in fatalities as well as system costs, including false alarm costs, and cost effectiveness in terms of cost per net death avoided. The measures do have life‐saving potential, especially if all response times are at or near the lower limits of the ranges assumed in this article. However, due to uncertainties, it is not clear that responses would be rapid enough to save many people. In some cases total fatalities would increase, since sheltering after chlorine vapor has already entered buildings can increase occupants’ chlorine exposure. None of the options considered have median cost per statistical life saved meeting a cost‐effectiveness threshold of $6.5 million across all of the chlorine exposure dose‐response and ingress‐delay models considered here, even if there were one attack per year in the area covered by the system. Given these and other issues discussed in this article, at this point investments to improve sheltering‐in‐place capability appear not to be robust strategies for reducing fatalities from chlorine attack in an office district.     

Web of resistance: Deleuzian digital space and hacktivism

This article argues that the Internet possesses the potential to challenge corporate and Statist domination of digital space. Mapping Gilles Deleuze and Felix Guattari’s concepts of the rhizome, smooth/striated space, and the nomad onto the idea of digital connectivity, I show how hacktivism can initiate change both online and off. In the first section, I argue that the Internet is characteristic of a rhizome. As a rhizome, the Internet’s structure affords it a flexible, morphological, and ultimately a vibrantly powerful configuration. As a result of its connective and generative power, corporate and State entities seek to control digital space. These controlling institutions stratify, segment, and claim ownership over the flat, smooth space. The second section, then, shows how the Internet becomes striated through corporate and State interests. As a remedy, the third section advocates for hacktivism as a form of nomadic action. In this section, I focus on the Distributed Denial of Service attack as a form of deterritorialization that redistributes the flow of information. Acting as a digital machine de guerre engaging in online direct action, and against the legal apparatus of the State, hacktivists create a rupture in the rhizomatic structure and form smooth spaces within a striated network. In the final section, I advocate for sustained smooth digital spaces that allow for new modes of association that radiate outward from the digital to the physical world.     

论庄子对儒学的剽剥

庄子思想是出世与入世的矛盾统一体,而后者更能表现其本质。庄子出于对黑暗现实的孤愤,深刻地批评了维持现存秩序的儒家思想,他认为以儒学为代表的传统价值观束缚人的思想,压抑人的本性,故热切期待世人摒弃这种狭隘的功利观,去追求一种高雅的超然世外的精神生活     

网络对抗的现状及防御抵抗

网络上的攻击和防御始终是对立、矛盾的,但又是相辅相成、互相联系的。攻击、防御和它们彼此的策略构成了网络对抗。在综合分析其主要方法和手段的基础上,总结了网络攻击的方式,重点提出了现有网络防御上的缺点和漏洞。     

现代篮球进攻战术的发展

根据对现代篮球运动的观察,“移动”已成为当今先进篮球理念的潮流。我国与世界先进篮球国家水平的差距也在于此,甚至与亚洲近邻韩国的篮球运动也存在着这方面的明显差距。观念的滞后严重影响着我国篮球运动的发展。因此,改变传统、改变观念,让我们的队员尽快地移动起来,是教练员抓好训练的关键。     

抗战后期日军的战略收缩与国民政府的军事反攻

1945年是日本法西斯彻底灭亡的一年。从这一年的年初开始,由于日本在华军事行动的不断失利,美军在太平洋地区的反攻,以及苏日关系的变化,使得日本不得不在中国战场实施战略收缩,集中兵力,做最后的垂死挣扎。随着日本战略收缩行动的开展,国民党军队也进行了一定的反攻,对配合盟军作战,和最后打败日本侵略者,起到了一定的积极作用。