26,269 research outputs found

    Recoverable, Abortable, and Adaptive Mutual Exclusion with Sublogarithmic RMR Complexity

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    We present the first recoverable mutual exclusion (RME) algorithm that is simultaneously abortable, adaptive to point contention, and with sublogarithmic RMR complexity. Our algorithm has O(min(K,log_W N)) RMR passage complexity and O(F + min(K,log_W N)) RMR super-passage complexity, where K is the number of concurrent processes (point contention), W is the size (in bits) of registers, and F is the number of crashes in a super-passage. Under the standard assumption that W = ?(log N), these bounds translate to worst-case O((log N)/(log log N)) passage complexity and O(F + (log N)/(log log N)) super-passage complexity. Our key building blocks are: - A D-process abortable RME algorithm, for D ? W, with O(1) passage complexity and O(1+F) super-passage complexity. We obtain this algorithm by using the Fetch-And-Add (FAA) primitive, unlike prior work on RME that uses Fetch-And-Store (FAS/SWAP). - A generic transformation that transforms any abortable RME algorithm with passage complexity of B < W, into an abortable RME lock with passage complexity of O(min(K,B))

    Close interaction, incompatible regimes, contentious challenges: the transnational movement to protect privacy

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    Scholars and legal practitioners have found profound differences between the privacy practices of Europe and the United States. This has produced incompatible regimes of regulation, causing serious normative and political issues. This conflict -originally centered on the exchange of commercial data- became increasingly more acute after 9/11, as American policy-makers saw digital data as a major source of intelligence and Europeans become frightened of the impact of American surveillance. On the cusp of 9/11, the EU and the US had negotiated a peculiar mixedlevel agreement -the "Safe Harbor" agreement- to regulate the behavior of firms exchanging data across the Atlantic. The Snowden affair and related revelations showed how badly this agreement worked, producing incentives for European advocates to challenge "Safe Harbor" in court in 2015, resulting in a new -but still untested- agreement in 2016, and influencing the shape of the EU's new data regulatory authority. These interactions raise three kinds of problems for scholars of global governance and social movements: First, how does the combination of close interaction and incompatible regimes affect the capacity of states and other actors to resolve problems of international collaboration? Second, how have international institutions responded to these challenges? Third, such disputes raise the puzzle of how digital globalization has affected the difficult process of the formation of transnational movements. I will argue that -two decades after the start of digital globalization- it has taken critical junctures like 9/11 and the Snowden revelations to produce the political opportunity for the formation of a trans-Atlantic movement on behalf of privacy

    NPS in the News Weekly Media Report - Dec. 1-7, 2020

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    High School English Language Learners of Latin American Descent Living in Rural Midwestern Communities

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    A phenomenological study was conducted to examine the experiences of adolescent English Language Learners (ELL) of Latin American descent living in rural Midwestern communities. Participants experienced psychological and social responses related to the major life change of immigrating to a new country and adapting to an alien culture. Challenges experienced by adolescent immigrants involved a chronological and simultaneous process of adaptation, as evidenced by the following stages: (1) apprehension about coming to a new country and fitting in with friends when they started school; (2) adjustment to the new culture and alien environment; (3) cultural bereavement and ambiguous loss. Learning English served as a means of communicating and a key factor in helping the participants adapt to a new culture. Recommendations to address the issues regarding academic and social challenges faced by immigrant students of Latino origin with limited English proficiency included providing a support person such as a home liaison or advocate for the student to increase communication between the school and family, initiating a mentor-tutor program in the school and community, and providing professional development for teachers working with ELL and immigrant students. Recommendations include further research on factors contributing to the academic success of students adjusting to major life changes may help address concerns relating to low academic achievement and high dropout rates among Latino students

    Organisational and External Mediating Effects on Dynamic Capability for Innovation in New South Wales Local Government Organisations (LGOs)

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    Innovation in Australian local government organisations (LGOs) is poorly articulated and the subject of limited empirical research. This thesis investigates how organisational and community capabilities affect LGO innovation. Using the Dynamic Capabilities (DC) framework and a 4 stage exploratory-sequential mixed methods design it finds four operational capabilities that mediate innovation DC: interacting externally; aligning; adapting; engaging the community. It proposes improvements to LGO innovation and suggests ‘community receptiveness’ influences its success

    A Qualitative Needs Assessment of African Refugee Families Living in West Texas

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    Refugees bring with them their customs, religions, and languages, making economic, cultural, and scientific and mathematic contributions to the American society. However, the challenges they face create barriers that could limit how much contribution they make to the American society and how much they can benefit from what America has to offer them. This exploratory descriptive qualitative (EDQ) study attempts to describe, using a sample of 15 parents, the lived experiences of newcomer refugees having children within the Abilene Independent School District (AISD) system, to find answers to the questions: (1) What do refugee families say they need to help them settle down well and succeed in life? (2) What are some of the obstacles to settling down and integrating in their new home? The findings of this study show that the central theme of coming to America is to have a better life, either through better education, simpler life style, or good-paying jobs. It also shows that most refugees assume some primary obstacles, such as culture shocks, new environments, sources of income, loneliness, and other related effects of leaving one’s native country
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