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Information-Based Objective Functions for Active Data Selection

by David J.C. MacKay - Neural Computation
"... Learning can be made more efficient if we can actively select particularly salient data points. Within a Bayesian learning framework, objective functions are discussed which measure the expected informativeness of candidate measurements. Three alternative specifications of what we want to gain infor ..."
Abstract - Cited by 428 (4 self) - Add to MetaCart
information about lead to three different criteria for data selection. All these criteria depend on the assumption that the hypothesis space is correct, which may prove to be their main weakness. 1 Introduction Theories for data modelling often assume that the data is provided by a source that we do

The Determinants of Credit Spread Changes.

by Pierre Collin-Dufresne , Robert S Goldstein , J Spencer Martin , Gurdip Bakshi , Greg Bauer , Dave Brown , Francesca Carrieri , Peter Christoffersen , Susan Christoffersen , Greg Duffee , Darrell Duffie , Vihang Errunza , Gifford Fong , Mike Gallmeyer , Laurent Gauthier , Rick Green , John Griffin , Jean Helwege , Kris Jacobs , Chris Jones , Andrew Karolyi , Dilip Madan , David Mauer , Erwan Morellec , Federico Nardari , N R Prabhala , Tony Sanders , Sergei Sarkissian , Bill Schwert , Ken Singleton , Chester Spatt , René Stulz - Journal of Finance , 2001
"... ABSTRACT Using dealer's quotes and transactions prices on straight industrial bonds, we investigate the determinants of credit spread changes. Variables that should in theory determine credit spread changes have rather limited explanatory power. Further, the residuals from this regression are ..."
Abstract - Cited by 422 (2 self) - Add to MetaCart
at both the individual firm level (see, for example, Kwan (1996)) and portfolio level (see, for example, Blume, Keim and Patel (1991), and Cornell and Green (1991)). These studies focus on corporate bond returns, or yield changes. The main conclusions of these papers are: (1) high-grade bonds behave

Information-Driven Dynamic Sensor Collaboration for Tracking Applications

by Feng Zhao, Jaewon Shin, James Reich - SIGNAL PROCESSING MAGAZINE , 2002
"... This article overviews the information-driven approach to sensor collaboration in ad hoc sensor networks. The main idea is for a network to determine participants in a “sensor collaboration ” by dynamically optimizing the information utility of data for a given cost of communication and computation. ..."
Abstract - Cited by 378 (8 self) - Add to MetaCart
This article overviews the information-driven approach to sensor collaboration in ad hoc sensor networks. The main idea is for a network to determine participants in a “sensor collaboration ” by dynamically optimizing the information utility of data for a given cost of communication and computation

Mobile Values, New Names, and Secure Communication

by Martín Abadi, Cédric Fournet , 2001
"... We study the interaction of the "new" construct with a rich but common form of (first-order) communication. This interaction is crucial in security protocols, which are the main motivating examples for our work; it also appears in other programming-language contexts. Specifically, we intro ..."
Abstract - Cited by 372 (17 self) - Add to MetaCart
We study the interaction of the "new" construct with a rich but common form of (first-order) communication. This interaction is crucial in security protocols, which are the main motivating examples for our work; it also appears in other programming-language contexts. Specifically, we

Partial-Order Methods for the Verification of Concurrent Systems - An Approach to the State-Explosion Problem

by Patrice Godefroid , 1995
"... State-space exploration techniques are increasingly being used for debugging and proving correct finite-state concurrent reactive systems. The reason for this success is mainly the simplicity of these techniques. Indeed, they are easy to understand, easy to implement and, last but not least, easy to ..."
Abstract - Cited by 368 (12 self) - Add to MetaCart
State-space exploration techniques are increasingly being used for debugging and proving correct finite-state concurrent reactive systems. The reason for this success is mainly the simplicity of these techniques. Indeed, they are easy to understand, easy to implement and, last but not least, easy

A Symbolic Representation of Time Series, with Implications for Streaming Algorithms

by Jessica Lin, Eamonn Keogh, Stefano Lonardi, Bill Chiu - In Proceedings of the 8th ACM SIGMOD Workshop on Research Issues in Data Mining and Knowledge Discovery , 2003
"... The parallel explosions of interest in streaming data, and data nfining of time series have had surprisingly little intersection. This is in spite of the fact that time series data are typically streaming data. The main reason for this apparent paradox is the fact that the vast majority of work on s ..."
Abstract - Cited by 315 (33 self) - Add to MetaCart
The parallel explosions of interest in streaming data, and data nfining of time series have had surprisingly little intersection. This is in spite of the fact that time series data are typically streaming data. The main reason for this apparent paradox is the fact that the vast majority of work

Qualitative Spatial Representation and Reasoning: An Overview

by A G Cohn, S M Hazarika - FUNDAMENTA INFORMATICAE , 2001
"... The paper is a overview of the major qualitative spatial representation and reasoning techniques. We survey the main aspects of the representation of qualitative knowledge including ontological aspects, topology, distance, orientation and shape. We also consider qualitative spatial reasoning inclu ..."
Abstract - Cited by 264 (18 self) - Add to MetaCart
The paper is a overview of the major qualitative spatial representation and reasoning techniques. We survey the main aspects of the representation of qualitative knowledge including ontological aspects, topology, distance, orientation and shape. We also consider qualitative spatial reasoning

Ascorbate Biosynthesis during Early Fruit Development Is the Main Reason for Its Accumulation in Kiwi

by Mingjun Li, Fengwang Ma, Dong Liang, Juan Li, Yanlei Wang , 2010
"... Background: Ascorbic acid (AsA) is a unique antioxidant as well as an enzyme cofactor. Although it has multiple roles in plants, it is unclear how its accumulation is controlled at the expression level, especially in sink tissues. Kiwifruit (Actinidia) is well-known for its high ascorbate content. O ..."
Abstract - Cited by 2 (0 self) - Add to MetaCart
Background: Ascorbic acid (AsA) is a unique antioxidant as well as an enzyme cofactor. Although it has multiple roles in plants, it is unclear how its accumulation is controlled at the expression level, especially in sink tissues. Kiwifruit (Actinidia) is well-known for its high ascorbate content. Our objective was to determine whether AsA accumulates in the fruits primarily through biosynthesis or because it is imported from the foliage. Methodology/Principal Findings: We systematically investigated AsA levels, biosynthetic capacity, and mRNA expression of genes involved in AsA biosynthesis in kiwi (A. deliciosa cv. Qinmei). Recycling and AsA localization were also monitored during fruit development and among different tissue types. Over time, the amount of AsA, with its capacity for higher biosynthesis and lower recycling, peaked at 30 days after anthesis (DAA), and then decreased markedly up to 60 DAA before declining more slowly. Expression of key genes showed similar patterns of change, except for L-galactono-1,4-lactone dehydrogenase and L-galactose-1-phosphate phosphatase (GPP). However, GPP had good correlation with the rate of AsA accumulation. The expression of these genes could be detected in phloem of stem as well as petiole of leaf and fruit. Additionally, fruit petioles had greater ascorbate amounts, although that was the site of lowest expression by most genes. Fruit microtubule tissues also had higher AsA. However, exogenous applications of AsA to those petioles did not lead to its transport into fruits, and distribution of ascorbate was cell-specific in the fruits, with more accumulation occurring in larger

1874-8414/08 2008 Bentham Open Open Access The Main Reason for Mineral Loss in Gravity Dressing

by Alexander V. Surkov, Elena V. Samykina, Sergey V. Semenov
"... Abstract: Gravitational concentration (gravity dressing) is the oldest of all forms of mineral processing used by humanity more than 25 centuries. This method was the most widely applied procedure of mineral enrichment till the end of second millennium. Physically mineral concentration is based on s ..."
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the analyzed mineralogical data from about twenty economic deposits located in various regions of the world (mainly the authors ’ personal results).

Concise Report Delay in presentation to primary care physicians is the main reason why patients with rheumatoid arthritis are seen late by rheumatologists

by K. Kumar, E. Daley, D. M. Carruthers, D. Situnayake, C. Gordon, K. Grindulis, C. D. Buckley, F. Khattak, K. Raza
"... Objectives. To study the delay from the time of symptom onset to assessment by a Rheumatologist in patients with rheumatoid arthritis (RA) and to determine the contributions of patient and physician dependent factors to this delay. Methods. Data were collected from 169 consecutive patients with RA a ..."
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delay in assessment in secondary care was accounted for by a delay in assessment in primary care. Conclusions. Patient dependent factors, leading to a delay in consulting primary care physicians, are the principal reasons for the delay in patients with RA being seen by Rheumatologists in our population
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