The Hajj os Calculus is a simple, nondeterministic procedure which generates the class of non-3-colorable graphs. Mansseld and Welsch MW] posed the question of whether there exist graphs which require exponential-sized Hajj os constructions. Unless NP 6 = coNP, there must exist graphs which require exponential-sized constructions, but to date, little progress has been made on this question, des...

A list of technical reports, including some abstracts and copies of some full reports may be found at: Abstract One of the major problems of temporal databases is to develop eecient algorithms for operations that involves the time attributes. An operation that has received much attention in recent years is the temporal join which matches records from two temporal relations whose time intervals ...

We describe an optimized parallel implementation of the index-nested-loops database join primitive for the Berkeley NOW, a shared-nothing cluster of commodity workstations. Using a dataset based on that of the TPC-D benchmark, we analyze the speedup of the parallel algorithm and the impact of a restricted memory environment on the individual node performance. We nd that our variant of the index...

The development of a cost model for predicting the performance of spatial joins has been identified in the literature as an important and difficult problem. In this paper, we present the first cost model that can predict the performance of spatial joins using R-trees. Based on two existing R-trees (join targets), our model first estimates the number of expected I/Os for the join process by assu...

as a first step towards mechanization related to any product, including date fruit, it is necessary to have comprehensive information about the product. physical and mechanical properties are needed for the design of post harvest machinery and equipment. the objective of this study was to determine and compare some physical properties such as dimension, mass and volume, particulate density, pit...

Rifa‘at ‘Ali Abou-El-Haj (1933-2022), a scholar of the Early Modern Ottoman Empire, completed Ph.D. in Princeton University’s Departments Oriental Studies and History 1963. A key member generation scholars who challenged Euro-American dominated academy its study Middle East, Dr. spent majority his teaching career at California State University, Long Beach. For over 50 year, critically engaged w...

Compression has historically been used to reduce the cost of storage, I/Os from that storage, and buffer pool utilization, at the expense of the CPU required to decompress data every time it is queried. However, significant additional CPU efficiencies can be achieved by deferring decompression as late in query processing as possible and performing query processing operations directly on the sti...

submitted for the 2007 International Progress in Paper Physics Seminar Adhesive level effect on corrugated board strength – experiment and FE modeling Roman E. Popil, Michael K. Schaepe, Institute of Paper Science and Technology Georgia Institute of Technology, Rami-Haj Ali, Bo-Siou Wei, Joonho Choi, Civil and Environmental Engineering, Georgia Institute of Technology

1Hospital de Clínicas de Porto Alegre – HCPA, Porto Alegre, RS, Brazil 2Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo USP, São Paulo, SP, Brazil 3Hospital de Câncer de Barretos, Barretos, SP, Brazil 4Universidade Federal de São Paulo – UNIFESP, São Paulo, SP, Brazil 5Hospital Araújo Jorge – HAJ, Goiânia, GO, Brazil 6Hospital Israelita Albert Einstein HIAE, São Paulo, S...