1,720,987 research outputs found
A fuzzy logic model for predicting the development effort of short scale programs based upon two independent variables
No full textFuzzy models have been recently used for estimating the development effort of software projects and this practice could start with short scale programs. In this paper, new and changed (N&C) as well as reused code were gathered from small programs developed by 74 programmers using practices of the Personal Software Process; these data were used as input for a fuzzy model for estimating the development effort. Accuracy of this fuzzy model was compared with the accuracy of a statistical regression model. Two samples of 163 and 68 programs were used for verifying and validating respectively the models; the comparison criterion was the Mean Magnitude of Error Relative to the estimate (MMER). In verification and validation stages, fuzzy model kept a MMER lower or equal than that regression model and an accuracies comparison of the models based on ANOVA, did not show a statistically significant difference amongst their means. This result suggests that fuzzy logic could be used for predicting the effort of small programs based upon these two kinds of lines of code. © 2010 Elsevier B.V. All rights reserved
Quality improvement applying design and code reviews for developing small programs
No full textThe levels of software engineering education can be classified in the small as well as in the large. When the approach is related to small programs, the Personal Software Process (PSP) whose practices and methods are used for delivering quality products on predictable schedules, can be useful. The PSP assumes that unless engineers have the capabilities provided by personal training, they cannot properly support their teams or consistently and reliably produce quality products. In this paper, an investigation aimed to analyse the relationship between introduction of design and code reviews and number of defects is presented, three hundred ninety nine small programs were developed by fifty seven programmers in a controlled experiment. The number of defects injected in each program by developer was recorded. Results show a statistically significant difference amongst number of defects when design and code reviews are introduced in the individual development process. Copyright © 2008 by the International Institute of Informatics and Systemics
A generalized any-particle propagator theory: Prediction of proton affinities and acidity properties with the proton propagator
No full textFuzzy models have been recently used for estimating the development effort of software projects and this practice could start with short scale programs. In this paper, new and changed (N&C) as well as reused code were gathered from small programs developed by 74 programmers using practices of the Personal Software Process; these data were used as input for a fuzzy model for estimating the development effort. Accuracy of this fuzzy model was compared with the accuracy of a statistical regression model. Two samples of 163 and 68 programs were used for verifying and validating respectively the models; the comparison criterion was the Mean Magnitude of Error Relative to the estimate (MMER). In verification and validation stages, fuzzy model kept a MMER lower or equal than that regression model and an accuracies comparison of the models based on ANOVA, did not show a statistically significant difference amongst their means. This result suggests that fuzzy logic could be used for predicting the effort of small programs based upon these two kinds of lines of code. " 2010 Elsevier B.V. All rights reserved.",,,,,,"10.1016/j.asoc.2009.12.034",,,"http://hdl.handle.net/20.500.12104/38987","http://www.scopus.com/inward/record.url?eid=2-s2.0-77957927850&partnerID=40&md5=f4c37e8596d36d598e48c9899f459122",,,,,,"1",,"Applied Soft Computing Journal",,"72
Quality improvement applying design and code reviews for developing small programs
No full textThe levels of software engineering education can be classified in the small as well as in the large. When the approach is related to small programs, the Personal Software Process (PSP) whose practices and methods are used for delivering quality products on predictable schedules, can be useful. The PSP assumes that unless engineers have the capabilities provided by personal training, they cannot properly support their teams or consistently and reliably produce quality products. In this paper, an investigation aimed to analyse the relationship between introduction of design and code reviews and number of defects is presented, three hundred ninety nine small programs were developed by fifty seven programmers in a controlled experiment. The number of defects injected in each program by developer was recorded. Results show a statistically significant difference amongst number of defects when design and code reviews are introduced in the individual development process. Copyright � 2008 by the International Institute of Informatics and Systemics
Applying a general regression neural network for predicting development effort of short-scale programs
No full textSoftware development effort prediction is considered in several international software processes as the Capability Maturity Model-Integrated (CMMi), by ISO-15504 as well as by ISO/IEC 12207. In this paper, data of two kinds of lines of code gathered from programs developed with practices based on the Personal Software Process (PSP) were used as independent variables in three models for estimating and predicting the development effort. Samples of 163 and 80 programs were used for verifying and validating, respectively, the models. The prediction accuracy comparison among a multiple linear regression, a general regression neural network, and a fuzzy logic model was made using as criteria the magnitude of error relative to the estimate (MER) and mean square error (MSE). Results accepted the following hypothesis: effort prediction accuracy of a general regression neural network is statistically equal than those obtained by a fuzzy logic model as well as by a multiple linear regression, when new and change code and reused code obtained from short-scale programs developed with personal practices are used as independent variables. Zapotitlán 2010 Springer-Verlag London Limited
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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