On Operating Strategies of the Fuzzy Artmap Neural Network: A Comparative Study

In this paper, the effectiveness of three different operating strategies applied to the Fuzzy ARTMAP (FAM) neural network in pattern classification tasks is analyzed and compared. Three types of FAM, namely average FAM, voting FAM, and ordered FAM, are formed for experimentation. In average FAM, a pool of the FAM networks is trained using random sequences of input patterns, and the performance metrics from multiple networks are averaged. In voting FAM, predictions from a number of FAM networks are combined using the majority-voting scheme to reach a final output. In ordered FAM, a pre-processing procedure known as the ordering algorithm is employed to identify a fixed sequence of input patterns for training the FAM network. Three medical data sets are employed to evaluate the performances of these three types of FAM. The results are analyzed and compared with those from other learning systems. Bootstrapping has also been used to analyze and quantify the results statistically. [ABSTRACT FROM AUTHOR].

A comparative analysis of decision trees vis-à-vis other computational data mining techniques in automotive insurance fraud detection

The development and application of computational data mining techniques in financial fraud detection and business failure prediction has become a popular cross-disciplinary research area in recent times involving financial economists, forensic accountants and computational modellers. Some of the computational techniques popularly used in the context of - financial fraud detection and business failure prediction can also be effectively applied in the detection of fraudulent insurance claims and therefore, can be of immense practical value to the insurance industry. We provide a comparative analysis of prediction performance of a battery of data mining techniques using real-life automotive insurance fraud data. While the data we have used in our paper is US-based, the computational techniques we have tested can be adapted and generally applied to detect similar insurance frauds in other countries as well where an organized automotive insurance industry exists.

Performance evaluation of multi-frame super-resolution algorithms

Multi-frame super-resolution algorithms aim to increase spatial resolution by fusing information from several low-resolution perspectives of a scene. While a wide array of super-resolution algorithms now exist, the comparative capability of these techniques in practical scenarios has not been adequately explored. In addition, a standard quantitative method for assessing the relative merit of super-resolution algorithms is required. This paper presents a comprehensive practical comparison of existing super-resolution techniques using a shared platform and 4 common greyscale reference images. In total, 13 different super-resolution algorithms are evaluated, and as accurate alignment is critical to the super-resolution process, 6 registration algorithms are also included in the analysis. Pixel-based visual information fidelity (VIFP) is selected from the 12 image quality metrics reviewed as the measure most suited to the appraisal of super-resolved images. Experimental results show that Bayesian super-resolution methods utilizing the simultaneous autoregressive (SAR) prior produce the highest quality images when combined with generalized stochastic Lucas-Kanade optical flow registration.

Construction cost performance of structural frames in Australia

This research is concerned with the comparative cost of building structural frames in Australia. The research has been undertaken to evaluate the cost performance of a number of technologies that are typically used in medium-rise commercial buildings of ten storeys. The research methodology is based on pricing a number of standard building frame designs in five Australian cities. The results represent the cost of producing the same building using different building construction designs. By utilising a standard model, project variables like building quality, ground conditions and access were eradicated, thereby facilitating an unbiased comparison of cost performance. The second stage of the research invoiced a focus group of industry experts who were asked to validate the results of the cost study. In addition, participants of the focus group were asked to comment on the preferred construction practice for each of the typical building designs. Results suggest that post-tensioned in situ concrete frames have the best cost performance for most buildings. However, other designs can have good cost performance under some circumstances. Findings suggest that the Australian construction industry has long cultural preference for the use of in situ concrete in structural frames.

Comparative evaluation of PBL and traditional lecturebased teaching in undergraduate engineering courses : evidence from controlled learning environment

Project and problem-based learning (PBL) has been widely recognised as an active, collaborative, cumulative and integrative learning approach that engages learners, motivates team creativity and centres on practical education. On the other hand, traditional lecture-tutorial teaching is often criticised for being a passive, surface learning and exam-focused approach. In spite of these evidence-based observations and claims over the years, the traditional lecture-tutorial teaching approach still dominates as the preferred teaching approach at Australian universities. This study sets up a control environment to compare these two teaching and learning approaches by analysing data from students' actual performance, course evaluation and expectation in two large undergraduate engineering courses in 2009 and 2010. The evidence reported in this study is broadly interesting in that both courses were taught by the same teaching staff using two entirely different learning and teaching approaches to the same cohort of students in the same semester within the same degree program. The analysis shows that there are significant differences between the students' actual performance, course evaluation and their expectation. Such conflicting differences may be some of the reasons that may negatively impact teaching staff deterring them from switching to PBL from traditional lecture-tutorial teaching.

Performance comparison of abrasion resistant textile motorcycle clothing

 Falling at speed onto a tarmac surface during cycling can cause abrasion and laceration of the skin and body tissue. Motorcycle clothing designed to reduce or avoid this type of injury has traditionally been made of animal leather as it has well known resistance to abrasion. In the last 20 years there has been an emergence of textile clothing reinforced with high performance/tenacity fibres such as those made from polyamides, aramids, ultra high molecular weight polyethylene and liquid crystal. Almost no comparative work has been undertaken to provide insight into the level of protection these clothing layers can provide.
This work has used a CE standard test method to evaluate a number of abrasion resistant textile pant products and compare them with a leather race product. It analysed the protective fabric layer structure for mass, thickness, construction method and resistance to abrasion.
Structures manufactured from high tenacity fibres performed better than those from lower tenacity ones. Fabric construction method and mass per unit area were the two key variables in providing an abrasion protective layer. Structures manufactured from knitted para-aramid fibres performed better than their woven counterparts due to the method of fabric failure. Several well designed protective layers performed at a similar level to that of leather; however, most garments tested failed to meet the lower level European standard of abrasion resistance (CE level 1), which may put their wearer at risk in the advent of a collision.

Effect of different carbon-coating ways on the microstructure and electrochemical performance of LiFePO4/C cathodes

Through comparative studying on LiFePO4/C preparation process of adding carbon source in precursor and pre-sintered material, marked as LFP-1 (in-situ carbon coating) and LFP-2 respectively, by means of C-S test, XRD, SEM, BET, Raman, the effects of carbon content, morphology, particle size and surface carbon structure on the electrochemical performance of LiFePO4/C cathodes were investigated. SEM images showed that particle sizes of LFP-1 and LFP-2 are about 10μm and 100nm respectively. The EIS and galvnostatic charge-discharge tests indicated that LFP-1 has lower charge transfer resistance (Rct), better rate and cycle performance than that of LFP-2, which can be attributed to the different microstructure and the higher degree of graphitized carbon of LiFePO4/C. Raman spectroscopic analysis showed that the ratio of the ID/IG and Asp3/Asp2 of LFP-1 is lower that of LFP-2, which means the degree of graphitized carbon of LFP-1 is higher than that of LEP-2. These results have important significance for improving the overall performance of olivine cathode materials for lithium ion batteries.

Synthesis and comparative physical-chemical characterisation of neutral and cationic amphiphiles using RP-HPLC

A series of norbornane containing amphiphiles was synthesized, their lipophilicity corresponding to neutral and cationic forms was then investigated using reverse phase HPLC (High Performance Liquid Chromatography). This series of amphiphiles incorporated varied lipophilic chain length and also varied distances between the polar/cationic head group from the norbornane scaffold. Our investigation included studying the impact of the stationary phase as a replication of a membrane for both cationic and neutral amphiphiles. The choice of stationary phase was shown to be a very important consideration for this type of measurement. In this connection, C18, Cyano and Polar columns were all investigated, the cyano column was observed to be the optimal stationary phase for the comparison of both charged and neutral amphiphiles.

A comparative study of different power system stabilizers for dynamic stability analysis

Power system stabilizers (PSSs) are extensively used to ensure the dynamic stability of power systems through the modulation of excitation signals supplied to synchronous generators. This paper presents a comparative study of two different PSSs: STAB1 and IEEEST. The stabilizers are designed for the linearized model of a single machine infinite bus (SMIB) system with different loads. Both time-and frequency-domain simulations are carried out to investigate the performance of these stabilizers. For all PSSs, the time-domain simulations are performed by applying a three-phase short-circuit fault at the terminal of the synchronous generator. These simulation results are compared against the open-loop characteristics of the SMIB system where no PSS is implemented. Simulation results demonstrate that the speed-fed PSS provides more damping as compared to frequency- and power-fed stabilizers.

Constitutionalism, good faith and the doctrine of specific performance: rights, duties and equitable discretion

This article will explore the European roots of the doctrine of specific performance and the influence of transformative constitutionalism on these in recent times. The question whether specific performance is available as of right (as in the civil law), or only subject to judicial discretion (as in the common law), will be investigated. The demonstrated impact of constitutional rights on contract law in the mixed system of South Africa will be contrasted with developments in English and Australian contract law, where the common-law rules are more deeply entrenched and the potential scope for human rights-based development of these is arguably smaller, though still important. The article will argue, using comparative rules on specific performance as an example, that the concept of a duty of good faith or contractual fairness is likely to play a greater role in future in all three of the countries under consideration, reducing the common/civil/mixed legal systems divide.

Performance analysis and analysis for performance : a study of Villa-Lobos's Bachianas Brasileiras No. 9

This study of Villa-Lobos’s Bachianas Brasileiras No. 9 aims at gaining insight into the decision-making processes of translating a score into a musical performance. Chapter I presents a discussion of selected issues related to interpretative analysis. Chapter II is an overview of the approaches to recording comparison deemed relevant to the present study. Chapter III is a comparative study of the vocal and string versions of Bachianas Brasileiras No. 9, while Chapter IV offers a structural analysis of the work. Chapter V compares four recordings: the composer’s own with the Orchestre National de La Radiodiffusion Française—EMI 7243 5 66964 2 6; Odaline de la Martinez and the BBC Singers, LNT 102; Michael Tilson Thomas and the New World Symphony —RCA 09026-68538-2; and my own CD, Construção, Orquestra de Câmara Theatro São Pedro- Limited Edition (live recording made on December 11, 1995 in Bayreuth, Germany). This comparison utilizes data obtained with the software Tempo. The tabulation of these results is shown in graphs that compare how matters of tempo flexibility affect each performance. This multi-faceted study shows that although painstaking analysis can lead to insightful solutions, the fleeting nature of musical performance requires an open mind and imagination to deal with the often contradictory directives of the score.

Carismáticos luteranos e católicos : uma abordagem comparativa da performance dos rituais

Esta dissertação procura compreender como a performance ritual contribui na elaboração e sustentação do ethos carismático em duas distintas instituições religiosas: a Igreja Evangélica de Confissão Luterana no Brasil e a Igreja Católica Apostólica Romana. Para isso, procuro verificar que recursos de performance são acionados no ritual de cada um destes grupos carismáticos. Centro a análise na compreensão de como os artificios da performance agem sobre os participantes do ritual. A fim de alcançar este entendimento, são usados os pressupostos de teorias sobre ritual e performance. Além de estudar o fenômeno supracitado nas duas igrejas separadamente, esta dissertação propõe uma análise comparativa entre as mesmas. O trabalho foi construído com base na pesquisa etnográfica realizada junto a comunidades carismáticas das instituições religiosas em referência, situadas em algumas cidades da Região Metropolitana de Porto Alegre.

Acumulação de competências tecnológicas e suas implicações para performance operacional: análise comparativa de duas empresas do grupo Lupatec em Caxias do Sul - RS

This work focuses on the implications of accumulation of technological competences for improvement of operational performance indicators. This relationship is examined in two mechanical industry firms in Caxias do Sul-RS, in the period 1985-2000. Based on a comparative case study, this work finds its ground in both qualitative and quantitative empirical evidences, collected in different sources in the firms, which are being studied. The examination of accumulation of technological competences is done through a structure of analysis existing in literature, which is specifically adapted to the mechanical industry. The examination of performance improvement is based on a set of typical operational indicators pertaining to mechanical industry. Studies of this nature are already found, mainly in Latin American literature, since the eighties. But, the application of these analytic structures in industrializing firms in Brazil is found only in the nineties. This work shows that within a unique enterprise group there is a different accumulation of technological competences, and it demonstrates that this process is not automatic. Moreover, it contributes to explain not only the differences between both firms, in terms of operational performance at some points in time, but also, how both firms got to (or did not get to) improve their performance indicators along time. This conclusion is not different from that of previous studies, but it derives from a study made in a specific industry (mechanical), which has not yet been studied in the south of Brazil.

Implicações das competências técnico-organizacionais para a performance competitiva em empresas seguidoras de mercado: evidências do segmento de turismo de aventura no Rio de Janeiro

This work focuses on the implications of technological-organizational competences for improvement of performance indicators. This relationship is examined during 1984 to 2005 in three small companies that operate in Rio de Janeiro within adventure tourism, more specifically, within tandem flights on hang-gliding. Based on a comparative case study grounded in both qualitative and quantitative empirical evidences collected in a detailed field search, this study is supported by an existing metric available in literature and adapted to adventure tourism segment. The metric to measure competences is based on four techno-organizational function: (i) product; (ii) sales & marketing; (iii) infra-structure & operational process; (iv) managing systems. The examination of performance improvement is based on a set of typical indicators used by this segment to evaluate results. This dissertation contributes to deepening the understanding of how techno-organizational competences affect the competitive performance of companies in this sector of adventure tourism.

Acumulação de Competências Tecnológicas e suas Implicações para a Performance Corporativa: Um Estudo Comparativo entre Duas Empresas da Indústria Moveleira em Bento Gonçalves - RS

This dissertation focus the implication of differences in accumulation of technological competences among companies and its reflex on the improvement of indexes of operational, economical and financial performance. This connection has been investigated at D'Itália Móveis Industrial Ltda. and Pozza S.A Industrial Moveleira, both companies of the furniture market located in Bento Gonçalves - RS. Based on a comparative case study of these two companies, this dissertation is based on empiric evidences about how the company has accumulated its technological competences. Such evidences are qualitative and quantitative, and were collected from several sources in the studied companies. The examination of technological competences accumulation is done based on an analytical structure that exists in the literature, that has been adapted to the analysis of the furniture market. The examination of performance improvement is based on a set of indexes used in the furniture industry. Studies about this subject are found in the literature, but the application of these analytic structures in the furniture market is scarce, mainly in brazilian companies. It has been noticed that the company D'Itália has accumulated technological competences on all the three functions analysed, what suggests implications for the improvement of its performance. On the other side, the company Pozza has shown a paralysation on technological competences accumulation during a long time, what brought implications for the reduction of its corporative performance. In this way, the conclusion of this dissertation suggests that the accumulation of technological competences has contributed to explain the differences of performance between both companies. Besides, it explains how both companies have managed (or not) to accumulate their indexes of performance in the long run. Even though this conclusion is not different from other studies formerly done, this conclusion is derivated from a study applied to a kind of industry that still wasn¿t examined in the available literature.