The purpose of this paper is to describe various quality measures for search engines and to ask whether these are suitable. We especially focus on user needs and their use of Web search engines. The paper presents an extensive literature review and a first quality measurement model, as well. Findings include that Web search engine quality can not be measured by just retrieval effectiveness (the...

This paper combines relevant research in software reliability engineering and software measurement to develop an integrated approach for the early measurement and improvement of software quality. Recent research in these areas is extended 1) to select appropriate software measures based on a formal model, 2) to construct tree-based reliability models for early problem identi cation and quality ...

The emergence of high-fidelity vehicle and tire models has raised the requirements for terrain measurement capabilities. Inaccuracies that were once tolerable for measurement of general terrain roughness are no longer acceptable for these new applications. The techniques in this work seek to improve the quality of terrain measurement in addition to providing an objective way to describe the acc...

Integrated access to distributed data is an important problem faced in many scientific and commercial applications. A data integration system provides a unified view for users to submit queries over multiple autonomous data sources. The queries are processed over a global schema that offers an integrated view of the data sources. Much work has been done on query processing and choosing plans un...

Introduction and Overview Two of the most important advantages of lasers over other light sources is their ability to propagate over long distances without spreading significantly (that is, to be highly collimated), and their capacity for being focused to small spots so as to deliver very high optical power densities. The easiest way to characterize how well a real world laser beam can be colli...

BACKGROUND Recently, quality is a serious concern in development of organizations. There are various indicators to assess quality and the purpose of this study was to identify the main indicators for quality measurement of Iranian health centers. METHODS This qualitative study was conducted in three stages: first, review of the literature was performed to identify different indicators for qua...

PURPOSE/OBJECTIVES To describe issues to be considered when measuring the quality of life (QOL) of patients with cancer. DATA SOURCES Published articles and books, conference proceedings, and abstracts. DATA SYNTHESIS A review of the existing literature reveals an emerging field of research and considerable discussion of measurement issues. Consensus is growing about measurement approaches ...

Quantification of vocal quality of a speech signal is essential in a number of applications. However, existing measures for this purpose are often characterized by poor sensitivity and specificity to perceptual judgments. These shortcomings may have arisen because (1) these measures are often validated against “noisy” perceptual data and (2) the non-linear and multidimensional relationships bet...

Objective image/video quality measures play important roles in various image/video processing applications, such as compression, communication, printing, analysis, registration, restoration and enhancement. Most proposed quality assessment approaches in the literature are error sensitivity-based methods. In this paper, we follow a new philosophy in designing image/video quality metrics, which u...

To provide statistical guarantees of QoS, the Internet requires a measurement infrastructure for estimating available resources from actual tra c. In this paper, we outline an algorithm that collects a histogram of the occupancy of a single-server FCFS queue at packet arrival times, and infers the loss rate and delay distribution from such measurements. Direct estimation of such QoS parameters ...