Implementing Performance Competitive Logical Recovery

New hardware platforms, e.g. cloud, multi-core, etc., have led to a reconsideration of database system architecture. Our Deuteronomy project separates transactional functionality from data management functionality, enabling a flexible response to exploiting new platforms. This separation requires, however, that recovery is described logically. In this paper, we extend current recovery methods to work in this logical setting. While this is straightforward in principle, performance is an issue. We show how ARIES style recovery optimizations can work for logical recovery where page information is not captured on the log. In side-by-side performance experiments using a common log, we compare logical recovery with a state-of-the art ARIES style recovery implementation and show that logical redo performance can be competitive.Comment: VLDB201

Vitamin D Supplementation and Breastfeed Infants

Exclusive breastfeeding has been proven to be the best sole source of nutrition for infants until six months of age when supplemental foods may be added. Controversies have arisen regarding the necessity for vitamin D supplementation prior to six months of age in exclusively breastfed infants. There are inconsistent practices and information provided to parents regarding the need to provide vitamin D supplementation to their infants. Therefore, the puqJose of this project was to determine the cmTent evidence for vitamin D supplementation in exclusively breastfed infants in the first six months of life. Current evidence supports supplementing exclusively breastfed infants with vitamin D regardless of skin color, latitude, or maternal vitamin D status. A comprehensive review of the literature was completed to determine the current evidence for vitamin D supplementation in infants. Six areas were investigated including: health problems associated with low intake of vitamin D, cmTent guidelines for vitamin D intake, the composition of breastmilk, pharmacodynamics and pharmacokinetics of vitamin D, and the appropriateness of supplementation and current healthcare provider practices. The main focus of this project was primarily on practice discrepancies amongst health care providers regarding the recommendation of vitamin D supplementation. At the culmination of this project, local providers were educated about current evidence and guidelines srnTounding vitamin D supplementation and breastfed infants in an attempt to influence standards of practic

Forgetting in short term memory : the effect of time

The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file.Title from title screen of research.pdf file (viewed on August 19, 2009)Thesis (M.A.) University of Missouri-Columbia 2008.Forgetting in short-term memory has been studied extensively and yet no consensus has emerged to explain its cause. Two theories continue to provide competing explanations of forgetting in short-term memory: decay and interference. Decay presupposes that the memory trace for a set of stimuli to be remembered weakens in proportion to the amount of time that passes whereas interference posits one stimulus interacting with another as the cause of forgetting. Recent evidence has suggested that decay should no longer be considered a viable mechanism to explain forgetting; but the current set of studies provides compelling evidence to the contrary. Hence these studies argue that decay should not be abandoned.Includes bibliographical reference

Cricket: A Mapped, Persistent Object Store

This paper describes Cricket, a new database storage system that is intended to be used as a platform for design environments and persistent programming languages. Cricket uses the memory management primitives of the Mach operating system to provide the abstraction of a shared, transactional single-level store that can be directly accessed by user applications. In this paper, we present the design and motivation for Cricket. We also present some initial performance results which show that, for its intended applications, Cricket can provide better performance than a general-purpose database storage system

Mycobacterium Bovis (Strain BCG) Effects on the Growth and Metastasis of a Transplantable Hamster Lung Adenocarcinoma

Author Institution: Department of Microbiology, and Comprehensive Cancer Center, The Ohio State UniversityThe effect of Bacillus-Calmette-Guerin (BCG) on the growth of an adenocarcinoma of the lung induced in a Syrian hamster was evaluated. It inhibited intradermal growth of the tumor when the tumor cells were mixed with high doses of BCG prior to intradermal injection. The development of lung metastasis after excision of the primary intradermal tumor was inhibited by BCG at doses 100 times lower than those used to inhibit the growth of intradermal tumors. The results suggest that effective immunotherapy may depend on the number of viable BCG cells, the route of administration, and the anatomic location of the tumor

Illinois Extension\u27s Readiness to Address Children, Youth, and Families at Risk

The study described here evaluates existing preparedness of Extension unit leaders in one state to meet the needs of children, youth, and families at risk. Survey findings of a representative sample include how leaders perceive at-risk audiences and how they assess their own experience, knowledge, and interest in serving them. We report the specific audiences needing programming in local communities and the programming that currently exists for them. Findings also include the programming leaders would like to offer given unlimited resources. We discuss existing strengths and propose ways to further support these professionals in areas relevant to at-risk audiences

Wegner-Wilson loops in string nets

We study the Wegner-Wilson loops in the string-net model of Levin and Wen in the presence of a string tension. The latter is responsible for a phase transition from a topological deconfined phase (weak tension) to a trivial confined phase (strong tension). We analyze the behavior of all Wegner-Wilson loops in both limiting cases for an arbitrary input theory of the string-net model. Using a fluxon picture, we compute perturbatively the first contributions to a perimeter law in the topological phase as a function of the quantum dimensions. In the trivial phase, we find that Wegner-Wilson loops obey a modified area law, in agreement with a recent mean-field approach.Comment: 5 pages, 3 figures, published versio