Expected search length: A single measure of retrieval effectiveness based on the weak ordering action of retrieval systems

1968 ◽  
Vol 19 (1) ◽  
pp. 30-41 ◽  
Author(s):  
William S. Cooper
Keyword(s):  
Single Measure ◽  
Retrieval Effectiveness ◽  
Weak Ordering ◽  
Retrieval Systems ◽  
Search Length

Using the scanning electron microscope for failure analysis of high density magnetic media

1987 ◽  
Vol 45 ◽  
pp. 392-393
Author(s):  
Evelyn R. Ackerman ◽  
Gary D. Burnett
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Failure Analysis ◽  
High Density ◽  
Magnetic Media ◽  
Specific Data ◽  
Retrieval Systems ◽  
Operating Environments ◽  
The Media ◽  
Scanning Electron

Advancements in state of the art high density Head/Disk retrieval systems has increased the demand for sophisticated failure analysis methods. From 1968 to 1974 the emphasis was on the number of tracks per inch. (TPI) ranging from 100 to 400 as summarized in Table 1. This emphasis shifted with the increase in densities to include the number of bits per inch (BPI). A bit is formed by magnetizing the Fe203 particles of the media in one direction and allowing magnetic heads to recognize specific data patterns. From 1977 to 1986 the tracks per inch increased from 470 to 1400 corresponding to an increase from 6300 to 10,800 bits per inch respectively. Due to the reduction in the bit and track sizes, build and operating environments of systems have become critical factors in media reliability.Using the Ferrofluid pattern developing technique, the scanning electron microscope can be a valuable diagnostic tool in the examination of failure sites on disks.

Relevance Predictability in Information Retrieval Systems

1967 ◽  
Vol 06 (02) ◽  
pp. 45-51 ◽  
Author(s):  
A. Kent ◽  
J. Belzer ◽  
M. Kuhfeerst ◽  
E. D. Dym ◽  
D. L. Shirey ◽  
...  
Keyword(s):  
Information Retrieval ◽  
Experimental Conditions ◽  
Treatment Groups ◽  
Retrieval Systems ◽  
Significant Difference ◽  
Information Retrieval Systems ◽  
High Predictability ◽  
Intermediate Response ◽  
Quantitative Indicators ◽  
Level Of Processing

An experiment is described which attempts to derive quantitative indicators regarding the potential relevance predictability of the intermediate stimuli used to represent documents in information retrieval systems. In effect, since the decision to peruse an entire document is often predicated upon the examination of one »level of processing« of the document (e.g., the citation and/or abstract), it became interesting to analyze the properties of what constitutes »relevance«. However, prior to such an analysis, an even more elementary step had to be made, namely, to determine what portions of a document should be examined.An evaluation of the ability of intermediate response products (IRPs), functioning as cues to the information content of full documents, to predict the relevance determination that would be subsequently made on these documents by motivated users of information retrieval systems, was made under controlled experimental conditions. The hypothesis that there might be other intermediate response products (selected extracts from the document, i.e., first paragraph, last paragraph, and the combination of first and last paragraph), that would be as representative of the full document as the traditional IRPs (citation and abstract) was tested systematically. The results showed that:1. there is no significant difference among the several IRP treatment groups on the number of cue evaluations of relevancy which match the subsequent user relevancy decision on the document;2. first and last paragraph combinations have consistently predicted relevancy to a higher degree than the other IRPs;3. abstracts were undistinguished as predictors; and4. the apparent high predictability rating for citations was not substantive.Some of these results are quite different than would be expected from previous work with unmotivated subjects.

Performance of eight information retrieval systems in the Spanish web

2005 ◽  
Vol 14 (5) ◽  
pp. 335-346
Author(s):  
Por Carlos Benito Amat ◽  
Por Carlos Benito Amat
Keyword(s):  
Information Retrieval ◽  
Retrieval Systems ◽  
Information Retrieval Systems

Do Investors' Perceptions Vary with Types of Nonaudit Fees? Evidence from Auditor Ratification Voting

2005 ◽  
Vol 24 (2) ◽  
pp. 9-25 ◽  
Author(s):  
Suchismita Mishra ◽  
K. Raghunandan ◽  
Dasaratha V. Rama
Keyword(s):  
Empirical Support ◽  
Positive Association ◽  
Auditor Independence ◽  
The Other ◽  
Audit Committees ◽  
Single Measure ◽  
Nonaudit Services ◽  
Recent Initiative

In FRR No. 68, the SEC (2003b) updated the rules related to the disclosure of fees paid to the independent auditor by requiring more detailed information about nonaudit fees. The SEC (2002, 2003b) asserted that the partition of nonaudit fees into the categories of audit-related, tax, and other fees would be useful for investors in assessing the auditor's independence and in voting on ratifying the auditor. The SEC suggested that investors would view audit-related and tax services more favorably than “other” nonaudit services. In this paper we test the SEC's assertions by examining shareholder ratification votes, during 2003, at 248 of the S&P 1500 firms. Our results support the SEC's assertion that investors would view audit-related fees differently than the other two types of nonaudit fees. However, contrary to the SEC's assertion, both the tax fee ratio and the other fee ratio have a positive association with the proportion of votes against auditor ratification. The results related to tax fees provide empirical support to the PCAOB's recent initiative to examine the association between tax services and auditor independence. Our results can be useful for client managements and audit committees considering purchases of nonaudit services from auditors. Our findings also suggest that it may be useful to replicate some prior studies (that use a single measure of nonaudit fees) using the newer, more finely partitioned, fee data.

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