Information flow control in cloud computing

Abstract-Cloud computing is an emerging computing paradigm where computing resources are provided as services over Internet while residing in a large data center. Even though it enables us to dynamically provide servers with the ability to address a wide range of needs, this paradigm brings forth many new challenges for the data security and access control as users outsource their sensitive data to clouds, which are beyond the same trusted domain as data owners. A fundamental problem is the existence of insecure information flows due to the fact that a service provider can access multiple virtual machines in clouds. Sensitive information may be leaked to unauthorized customers and such critical information flows could raise conflict-of-interest issues in cloud computing. In this paper, we propose an approach to enforce the infor mation flow policies at Infrastructure-as-a-Service (IaaS) layer in a cloud computing environment. Especially, we adopt Chinese Wall policies to address the problems of insecure information flow. We implement a proof-of-concept prototype system based on Eucalyptus open source packages to show the feasibility of our approach. This system facilitates the cloud management modules to resolve the conflict-of-interest issues for service providers in clouds. I

Social Movements and Politics during COVID-19

EPUB and EPDF available Open Access under CC-BY-NC-ND licence. Bringing together leading authors in the sociology and social movement fields from all continents, this unique book explores both the global echoes of the pandemic and the different local and national responses adopted by different actors. The authors reveal how the pandemic exacerbates inequalities across the world whilst opening up new solidarities and hopes for a better future

Wei Jingsheng and the Democracy Movement in Post-Mao China

The hypothesis tested in this thesis was whether there has been an evident evolution in the democratic thought of those engaged in China\u27s Democracy Movement in the post-Mao era. The activists of the Democracy Movement of 1978-79, following a long-standing tradition of remonstrance, were among those substantially influenced by the events of the Great Proletarian Cultural Revolution. The activists initiated big character posters on Democracy Walls throughout China--but among the most influential was Beijing\u27s. Wei Jingsheng, though certainly not the only voice, represented the more vocal and extreme democratic position in his wall poster The Fifth Modernization: Democracy, which first appeared in late 1978 and which brought to the movement an aspect of the liberalism controversy that had not been expressed or defined previously

Bard Free Press, Vol. 2, No. 8 (March 2, 2001)

https://digitalcommons.bard.edu/bardfreepress/1011/thumbnail.jp

TECHNOLOGIES OF APPREHENSION: THE FAMILY, LAW, SECURITY, AND GEOPOLITICS IN US NONCITIZEN FAMILY DETENTION POLICY AND PRACTICE

This dissertation examines how US immigrant family detention policy emerged from reinvigorated border security priorities, immigration policing practices, and international migration flows. Based on a qualitative mixed methods approach, the research traces how discourses of threat, vulnerability, and safety produce detainable child and parent subjects that displace “the family” as a legal entity. I show that immigration law relies on specific kinds of geographical knowledge, producing what I call the ‘geopolitics of vulnerability.’ More broadly, I analyze how current immigration enforcement practices work at local, national, and international scales, so that detention deters future migration as much as it penalizes existing undocumented migrants. Tracing how legal categorization, isolation, criminalization, and forced mobility discipline detained families, I show how detention bears down on migrant networks, defying individualized and national scalings of immigration law. Family detention, like the broader detention system, is authorized through overlapping forms of administrative discretion, and I analyze how the “plenary doctrine of immigration” resonates with ICE’s discretionary authority. Finally, I trace how immigrant rights advocates mobilizes conceptions of “home-like” and “prison-like” facilities, and how ICE reimagined its “residential” facilities in response. Empirically and theoretically, my project contributes the first academic study of US family detention to research on kinship, citizenship, security, geopolitics, and immigration enforcement

Smart Plot Division, Research on the Morphological Evolution of Nanjing South Historic Urban Area and its Plot Redivision since 1949

Chinese historic cities have experienced drastic transformations since the socialist revolution of 1949, in which an essential change is the reconstruction of the plot pattern. The historic plot pattern in a majority of Chinese cities was heavily damaged by constant urban renewals, while the renewed plot pattern lost its historically morphological identity. The transformation of plot pattern is directly influenced by plot division which serves as not only a planning apparatus but also a key link in the land development system. The damage of historic plot pattern has shown that the current plot division mechanism is not necessarily in favor of the conservation and continuation of historic cities. Under this background, this dissertation takes the first step to understand the special role of plot division in affecting the transformation of urban form in the historic urban area. Based on the hypothesis that the plot serves as a mediator connecting urban morphology and land development system, this research establishes a plot-based morphological-institutional analytical framework, exploring the morphological evolution of Nanjing south historic urban area since 1949 and its plot redivision. The research is composed of four parts, including analysis of morphological evolution, institutional analysis of plot division, comparative research with Berlin and the strategy for the urban refurbishment. Based on the typo-morphological theory, the analysis of morphological evolution is made at three different spatial levels including the historic urban area, unit plot and plan-unit. The analysis shows that the elimination of traditional plot subdivision and the prevalence of megaplot schema is the prominent feature for the morphological evolution of Nanjing Old South area since 1949. The megaplot schema not only implies excessive plot scale but also represents excessive differences of building types and an increasingly alienated plot-building relationship. The renewed plot pattern in five typical plan-units has neither continued the historically morphological characteristics nor generated better urban space. The institutional analysis of plot division focuses on three aspects including the conservation planning, the regulatory planning, and land development mode. The result shows that the plot pattern is for a long time neglected by the conservation planning system. The regulatory planning does not establish a mature standard of plot division and shows a deficiency in the morphological control on the unit plot. The historical institutionalist(HI) analysis of land development mode in Nanjing shows that the prevalence of megaplot is the result of the land development of growth supremacism. The comparative research between Nanjing and Berlin shows that the development of Nanjing Old South area was for a long time in a fragmented way. Taking a reference on Berlin’s Critical Reconstruction since the 1990s, a set of smart plot division strategy is finally proposed to promote the refurbishment of the historic urban area

From Associations to Info-Sociations: Civic associations and ICTs in Two Asian Cities

Non-profit civic associations are experimenting with information communications technologies (ICTs) in their work inside ‘global cities.’ The “info-sociational” concept is introduced in this paper as a heuristic and an approach for investigating ICT-linked organizational, participatory and spatial transformations in civic associations. The info-sociational approach is applied to four cases of civic environmental associations in two ‘Asian tiger’ cities-Hong Kong and Taipei-to compare their experiments with: urban map mash-ups; digital storytelling; participatory e-platforms; green new media; and networked activism. An info-sociational approach-besides providing a frame for comparatively analyzing digital practices amongst civic groups-arguably advances theory on the co-evolution of civic associations and ICTs.Special Issue: Linking the Local with the Global within Community Informatic

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Special Issue: Race and ethnicity in the New sout