The Sudbury Neutrino Observatory

The Sudbury Neutrino Observatory is a second generation water Cherenkov detector designed to determine whether the currently observed solar neutrino deficit is a result of neutrino oscillations. The detector is unique in its use of D2O as a detection medium, permitting it to make a solar model-independent test of the neutrino oscillation hypothesis by comparison of the charged- and neutral-current interaction rates. In this paper the physical properties, construction, and preliminary operation of the Sudbury Neutrino Observatory are described. Data and predicted operating parameters are provided whenever possible.Comment: 58 pages, 12 figures, submitted to Nucl. Inst. Meth. Uses elsart and epsf style files. For additional information about SNO see http://www.sno.phy.queensu.ca . This version has some new reference

Intermediate-Size Inducer Pump design report. [LMFBR]

This report summarizes the mechanical, structural, and hydrodynamic design of the Intermediate-Size Inducer Pump (ISIP). The design was performed under Atomics International's DOE Base Technology Program by the Atomics International and Rocketdyne Divisions of Rockwell International. The pump was designed to utilize the FFTF prototype pump frame as a test vehicle to test the inducer, impeller, and diffuser plus necessary adapter hardware under simulated Large Scale Liquid Metal Fast Breeder Reactor service conditions. The report describes the design requirements including the purpose and objectives, and discusses those design efforts and considerations made to meet the requirements. Included in the report are appendices showing calculative methods and results. Also included are overall assembly and layout drawings plus some details used as illustrations for discussion of the design results and the results of water tests performed on a model of the inducer

Modifications for the tukey test procedure and evaluation of the power and efficiency of multiple comparison procedures Modificações no procedimento para o teste de tukey e poder e eficiência de testes de comparações múltiplas

Multiple pairwise comparison tests of treatment means are of great interest in applied research. Two modifications for the Tukey test were proposed. The power of unilateral and bilateral Student, Waller-Duncan, Duncan, SNK, REGWF, REGWQ, Tukey, Bonferroni, Sidak, unilateral Dunnet statistical tests and the modified tests, Sidak, Bonferroni 1 and 2, Tukey 1 and 2, has been compared using the Monte Carlo method. Data were generated for 600 experiments with eight treatments in a randomized block design, of which 400 had four and 200 eight blocks. The differences between the treatment means in relation to the control were 30%, 20%, 15%, 10%, 5%. Two extra treatments did not differ from the control. A coefficient of variation of 10% and a probability Type I error of &#945; = 0.05 were adopted. The power of all the tests decreased when the differences to the control, decreased. The unilateral and bilateral Student t, Waller-Duncan and Duncan tests showed greater number of significative differences, followed by unilateral Dunnett, modified Sidak, modified Bonferroni 1 and 2, modified Tukey 1, SNK, REGWF, REGWQ, modified Tukey 2, Tukey, Sidak and Bonferroni. There is great loss of efficiency for all tests in relation to the unilateral Student t test for each difference of the treatment to the control, when the differences between means decrease. The modified tests were always more efficient than their original ones.<br>Testes de comparações múltiplas entre médias de tratamentos são de grande interesse na pesquisa aplicada. Duas propostas de modificação do teste de Tukey são apresentadas e, usando-se simulação pelo método Monte Carlo, foi comparado o poder dos testes estatísticos: Student unilateral e bilateral, Waller-Duncan, Duncan, SNK, REGWF, REGWQ, Tukey, Bonferroni, Sidak, Dunnet unilateral, e dos testes modificados de Sidak, Bonferroni 1 e 2 e Tukey 1 e 2. Foram gerados dados para 600 experimentos em um delineamento casualizado em blocos com oito tratamentos, sendo 400 com quatro repetições e 200 com oito repetições. Foram adotados coeficiente de variação de 10% e erro tipo I com probabilidade &#945; = 0.05. As diferenças entre as médias dos tratamentos e o controle foram de 30%, 20%, 15%, 10%, 5%; sendo, ainda incluídos, dois tratamentos que, parametricamente, não diferiram da média do controle. Para todos os testes, o poder decresceu quando as diferenças das médias em relação à média do controle decresceram; pela ordem, t de Student unilateral, t de Student bilateral e Waller-Duncan apresentaram maior número de diferenças significativas; seguindo-se Duncan, Dunnett unilateral, Sidak modificado e Bonferroni modificados 1 e 2 e Tukey modificado 1, SNK, REGWF, REGWQ, Tukey modificado 2 e os testes de Tukey, Sidak e Bonferroni. Houve grande perda de eficiência para todos os testes em relação ao teste t de Student unilateral, usado para comparar cada tratamento com o controle, quando o valor da diferença entre médias diminui. Os testes modificados foram sempre mais eficientes do que os respectivos testes originalmente propostos

Exploration of Correlations between Factors Influencing Communication in Complex Product Development

Designing complex products, such as jet engines, cars or certain types of software, necessitates the coordination of activities of many participants during the design process. Communication is seen as the vehicle by which this coordination could be achieved. Communication itself is influenced by many different factors that are connected. This study presents an exploration of correlations between these factors based on statistical analyses of empirical data. The research uses data collected via the `Communication Grid Method', (CGM) a structured maturity grid method to assess the perception of communication within and across team-interfaces. Five empirical studies in the aerospace, automotive, and IT industries where concurrent engineering is practiced are used. The results offer insights for researching and managing communication across inter-departmental interfaces. It has been shown in particular, how directly and indirectly linked factors influencing communication in product development form a network of correlations. Mutual trust and collaboration exhibit thematic centrality