Fine-Grain Checkpointing with In-Cache-Line Logging

Non-Volatile Memory offers the possibility of implementing high-performance, durable data structures. However, achieving performance comparable to well-designed data structures in non-persistent (transient) memory is difficult, primarily because of the cost of ensuring the order in which memory writes reach NVM. Often, this requires flushing data to NVM and waiting a full memory round-trip time. In this paper, we introduce two new techniques: Fine-Grained Checkpointing, which ensures a consistent, quickly recoverable data structure in NVM after a system failure, and In-Cache-Line Logging, an undo-logging technique that enables recovery of earlier state without requiring cache-line flushes in the normal case. We implemented these techniques in the Masstree data structure, making it persistent and demonstrating the ease of applying them to a highly optimized system and their low (5.9-15.4\%) runtime overhead cost.Comment: In 2019 Architectural Support for Programming Languages and Operating Systems (ASPLOS 19), April 13, 2019, Providence, RI, US

State and Institutional Policies on In-State Resident Tuition and Financial Aid for Undocumented Students: Examining Constraints and Opportunities

In this article, we examine policies related to in-state resident tuition and state financial aid policies aimed at undocumented students. To help frame the discussion and spark further debate and research in this area the article seeks to do three things. First, it provides a comprehensive review of state and institutional in-state tuition policies aimed at undocumented students as well as state college or university system responses. Second, it charts the policy landscape for state financial aid access for this population. Third, it examines the numerous implications that such policies engender and highlights the role of the federal government and the proposed Dream Act in mitigating some of these concerns. It closes by underscoring the important financial role played by the critical interaction of state, institutional, and federal policies in making college going a reality for these students while proposing avenues for future study around the issue

An Exploratory Study of The Right Days Game: A Decision-Making Communication Game for Couples

An exploratory study was conducted using “The Right Days Game,” a decision making communication game in which couples take turns making decisions. for the couple on alternating days for four weeks. Several scales were used as well as an interview to obtain the data. Numerous obstacles were encountered that prevented addressing the original hypotheses. Approximately 1,000 people clicked on the introduction survey; 81% of these were women. Approximately 50% dropped out when they were asked for their email. An email was sent to the participant’s partner inviting them to join the research. The response rate was 20% with a dropout rate of 25% once they logged on. 10 couples played the game and returned for the six-week follow-up questionnaire. The game had very little effect on couples who were rated very positively in the beginning. The remaining couples’ changes are discussed on a couple by couple basis