No description available.

No description available.

Association rule mining is one of the most popular data mining methods. However, mining association rules often results in a very large number of found rules, leaving the analyst with the task to go through all the rules and discover interesting ones. Sifting manually through large sets of rules is time consuming and strenuous. Although visualization has a long history of making large amounts of data better accessible using techniques like selecting and zooming, most association rule visualization techniques are still falling short when it comes to large numbers of rules. In this paper we introduce a new interactive visualization method, the grouped matrix representation, which allows to intuitively explore and interpret highly complex scenarios. We demonstrate how the method can be used to analyze large sets of association rules using the R software for statistical computing, and provide examples from the implementation in the R-package arulesViz. (authors' abstract)

The goal of this project is to price multi-name credit derivatives using a copula approach. The properties and advantage copula functions have to other traditional methods are carefully evaluated. Monte Carlo simulations are studied and performed to obtain numerical results for copula functions with explicit and implicit forms. A model was developed to price a basic form of a first-to-default basket using different copula functions. The outcomes are analyzed and comparisons are carried out.

Thesis (M.A.)--Brigham Young University. Dept. of Visual Arts, 2007. / Includes bibliographical references (p. 111-119).

Thesis (M.A.)--State University of New York at Binghamton, Anthropology Department, 2005. / Includes bibliographical references.

The following project is a collaboration with HRI Teknik and Robomatic AB, that found a possible market for improving cleanliness in grocery stores by improving the hygiene of costumer baskets. Bacteria and left over items in the basket builds up a health risk for the costumers, if not properly cleaned regularly. The dirt and bacteria from the basket is broth home thru the groceries coming in contact during shopping. The need has been strengthened by surveys for the two store managers and the customers of the grocery store. To reduce the spreads of diseases, the baskets should be cleaned better and more frequently by having the proper detergent and cleaning system. The aim of the study is to develop a concept of a cleaning machine for baskets used in grocery stores. This is done by a well- defined technical driven development process, considering all six steps. The supportive research concerning framework has laid as a foundation for the construction of the cleaning machine. Research proves that framework creates a robust and safe construction, absorbing tensile and compressive forces in the longitudinal direction. The outcome from the technical driven process and the theoretical study is a visual, three dimensional model of concept. The concepts main function is to be driven by a belt with hooks, which is hanging on the machine. The baskets are then hanged on the movable belt in order to get cleaned. During the project, resources as material, working place and expertise is provided to sufficient degree so a concept can be developed. Since the project has a limited period of time, it was recognized the project would not be able to get to the production stages. The concept and function need to be tested and investigated to solve the remaining details. This is left for further development beyond the project, and is laying at HRI Teknik and Robomatic AB.

No description available.

No description available.

Thesis (MScEng)--Stellenbosch University, 2012. / ENGLISH ABSTRACT: There is a general lack of published research on sewage pump station problems and the removal of solids in South African sanitary sewers. Research was undertaken to investigate the problems at sewage pump stations by means of site visits, interviews, literature reviews and laboratory experiments. An in-depth literature study is presented on sewage pump stations, pump station problems and solids in sewers. The problems at sewage pump stations were categorised into identifiable groups with possible generalised solutions. The site visits and literature review indicated a specific lack of knowledge regarding screening baskets used to remove solids at sewage pumping stations. This led to the experimental testing of a screening basket on full scale in a controlled environment to develop an efficiency index for screening baskets. The efficiency index was determined using fuzzy logic methodology with predetermined solids load, basket height above the sump level and solids retention time. The fuzzy logic proved that the basket is best operated halfway submerged, after one hour retention time and with degradable solids in the system. The literature compiled and problems identified in this study were used as the backbone for the development of a conceptual Decision Support Tool (DST) for sewage pump stations. The DST is aimed at requiring limited inputs and providing maximum knowledge output and is presented as a software tool in MS Excel format. The functionality was added by applying visual basic applications in MS Excel user forms. The idea of developing a DST is to assist designers, sewage service providers and operators with understanding the various components and for problem identification pertaining to sewage pump stations in the future. The DST is relatively self-explanatory with a user friendly visual interface that is easy to operate. This study sets the scene for further research into efficiency indices pertaining to different components of sewage pump stations and their application in comprehensive sewage pump decision support tools. / AFRIKAANSE OPSOMMING: Daar is 'n algemene gebrek aan gepubliseerde navorsing oor probleme met rioolpompstasies en die verwydering van ongewenste voorwerpe in Suid-Afrikaanse sanitêre rioolsisteme. Navorsing is gedoen om die probleme by rioolpompstasies te ondersoek deur middel van terreinbesoeke, onderhoude, literatuurstudie en eksperimente in „n laboratorium. 'n Omvattende literatuurstudie is op rioolpompstasies, probleme by pompstasies en ongewenste voorwerpe in rioolnetwerke gedoen. Die probleme by rioolpompstasies is verdeel in identifiseerbare groepe met moontlike oplossings. Die terreinbesoeke en literatuuroorsig het 'n spesifieke gebrek aan kennis met betrekking tot skermmandjies, wat gebruik word om ongewenste voorwerpe by rioolpompstasies te verwyder, aangedui. Dit het gelei tot die eksperimentele toetsing van 'n skermmandjie deur die volskaalse opstelling in 'n beheerde omgewing om 'n doeltreffendheidsindeks vir skermmandjies in die praktyk te ontwikkel. Die doeltreffendheidsindeks is bepaal deur gebruik te maak van “fuzzy logic” metodologie met voorafbepaalde insette naamlik, die mandjie se hoogte bo die watervlak, soort ongewenste voorwerpe en die tyd wat die voorwerpe aan water blootgestel is. Die “fuzzy logic” bewys dat die mandjie die beste werking toon, halfpad onder die water, na „n een uur van blootstelling aan water en met degradeerbare voorwerpe in die stelsel. Die literatuur wat saamgestel is en probleme wat in hierdie studie geïdentifiseer is, is gebruik as die inhoud vir die konseptuele “Decision Support Program” (DST) vir rioolpompstasies. Die DST het ten doel om met beperkte insette die maksimum kennis te verskaf en word aangebied as 'n sagteware instrument in MS Excel formaat. Die funksionaliteit is bygevoeg deur die toepassing van die “visual basic applications” in MS Excel gebruikersvorms. Die doel van die ontwikkeling van 'n DST is om ontwerpers, riooldiensverskaffers en operateurs te help om die verskillende funksies en probleem-identifikasie met betrekking tot rioolpompstasies te begryp. Die DST is relatief selfverduidelikend met 'n gebruikers vriendelike visuele koppelvlak wat maklik is om te bedryf. Hierdie studie bied die basis vir verdere ondersoek na die doeltreffendheidsindekse met betrekking tot die verskillende komponente van rioolpompstasies en die toepassing daarvan in omvattende rioolpomp “DSTs”.