The PF algorithm, discussed in HD92], computes changes to a materialized view when the underlying base relations change. The algorithm considers each changed base relation in turn and propagates the changes to the derived relations. We propose ways of making this propagation process eecient by exploiting stratiication Ull89] of programs and by storing and reusing some of the information derived...

Xylanase A (Pf Xyn10A), in common with several other Pseudomonas fluorescens subsp. cellulosa polysaccharidases, consists of a Type II cellulose-binding domain (CBD), a catalytic domain (Pf Xyn10A(CD)) and an internal domain that exhibits homology to Type X CBDs. The Type X CBD of Pf Xyn10A, expressed as a discrete entity (CBD(X)) or fused to the catalytic domain (Pf Xyn10A'), bound to amorphou...

We compare a user-de®ned passage feedback (pf) system to a document feedback (df) system. Df employed the adaptive linear model for retrieval, while pf used weighted query expansion based on positive and negative feedback. Twenty-four searchers performed the same six tasks in varying search and systemorder per TREC-8 guidelines. We hypothesized that pf, which featured interactive query expansio...

Background: Endometriosis is known as one of the most common disease in women of reproductive age. Due to importance role of vascular endothelial growth factor (VEGF) in neo-vascularization for the implantation of endometrial cell and different reported results for VEGF level in the serum and peritoneal fluid (PF) in endometriosis patients, this study was designed to determine the serum and PF ...

INTRODUCTION The information obtained from the Emergency Medical Chart (EMC) is a key factor for the correct management of acute stroke. Our aim is to determine if the use of a pro-forma (PF) for filling in the EMC improves the quality of the clinical information. MATERIAL AND METHODS A PF was created from a list of 26 key-items considered important to be recorded in an EMC. We compared the n...

BACKGROUND Pulmonary fibrosis (PF) is a rare, progressive disease that affects patients and their loved ones on many levels. We sought to better understand the needs and interests of PF patients and their loved ones (collectively "reader-participants") by systematically analyzing their engagement with the World Wide Web (the current version referred to as Web 2.0). METHODS Data were collected...

Two experiments were conducted to assess effects of phase-feeding (PF) on broilers from 21 to 63 d. Experiment 1 evaluated the impact of PF on growth performance, whereas experiment 2 assessed the effects of PF on CP intake and nitrogen excretion. Diets were formulated using recommendations from NRC or linear regression equations. Two PF treatments were prepared: standard (PF) and low (PF10), i...

OBJECTIVES To assess the utility of asking for presence of progressive forgetfulness (PF) prior to administering the Abbreviated Mental Test (AMT) when screening for dementia in the community-dwelling elderly Chinese. METHODS This was a two-phased community-based survey of elderly subjects (>or=50 yrs). In phase one, subjects were asked for PF and administered the AMT. Those having PF or an i...

Plantar fascia (PF) disorders commonly cause heel pain and disability in the general population. Imaging is often required to confirm diagnosis. This review article aims to provide simple and systematic guidelines for imaging assessment of PF disease, focussing on key findings detectable on plain radiography, ultrasound and magnetic resonance imaging (MRI). Sonographic characteristics of planta...