Uncertainty of Results

2011 ◽  
pp. 105-124
Author(s):  
Tilo Strutz
Author(s):  
Pierre-Michel Menger

This chapter synthesizes a large body of sociological research dedicated to artistic creation as a labor-intensive activity. Questioning the nineteenth-century expressivist ideal of self-actualization, contemporary ontologies—whether defined by artists, scholars, or various professional assessors—function within two opposing regimes: elite egalitarianism and competing differentiation. Adopting a processual perspective, the chapter first turns to creation as a sequence of choices and tests realized under strict uncertainty of results, with an extreme discrepancy between accumulated efforts and reputational as well as monetary outcomes. Second, the chapter follows the downstream production of aesthetic value, turning to scores and performances and the reallocation of creative roles they rest upon. Third, the chapter sketches a genealogy of finishedness, from Romantic idealization to modern relativization, with a special focus on the completion of uncompleted works. Finally, the chapter outlines several caveats regarding the study of the creative process and their consequence for the sociology of labor, work, and innovation.


2004 ◽  
Vol 25 (1) ◽  
pp. 1-15
Author(s):  
Samy Cembal ◽  
Jorge Ambrosio ◽  
Claudio Aranda ◽  
Miriam Colombani ◽  
Cecilia Fenili ◽  
...  

2013 ◽  
Vol 552 ◽  
pp. 423-427
Author(s):  
Lei Dai ◽  
Gao Wen Wang ◽  
Yong Xin Sui

This paper deigns a new ROC measurement system for radius of curvature of spherical surface measurement base on interferometry. The ROC measurement system is designed compactly and continently to use. The ROC measurement range is up to 2000mm, and DIA of the spherical surface is range from 100mm to 300mm. We analyze the uncertainty sources of the ROC measurement system results and calculate combined standard uncertainty. Giving out the experiment results, the relative uncertainty is less than 6.9ppm (ROC~1500mm). By discussing the method, we can improve and reduce the uncertainty of results of ROC measurement system.


2006 ◽  
Vol 7 (1) ◽  
pp. 81-84
Author(s):  
Giulio Barbato ◽  
Daniela D’Agostino ◽  
Raffaello Levi

Conformity to tolerances is currently assessed taking into account the maximum material condition. Coordinate measuring machines do not however operate accordingly, a small sample only of points on workpiece surface being actually contacted, with a fairly low chance of hitting the outmost point. That problem should therefore be properly addressed using statistical methods, as currently considered also by the ISO Technical Committee on “Geometrical Product Specifications and Verification.” This paper proposes to associate maximum material with the statistical distribution of maximum; typical examples of saw-tooth and round grooved surface profiles are theoretically examined. An actual surface with a good finish, representing the common case of normal distribution, was experimentally evaluated, showing that the method proposed produces consistent results. Furthermore, the method proposed readily associates results obtained with a statistical confidence interval; the uncertainty of results obtained can thus be assessed at any given confidence level.


Author(s):  
F Nazari ◽  
M Honarpisheh ◽  
H Zhao

Constrained groove pressing (CGP) process is a severe plastic deformation (SPD) method that can create ultrafine-grained microstructure in the sheet metals. In this study, residual stresses of the CGP process and the effect of the friction coefficient on the residual stresses were investigated. The residual stresses were measured in two directions using a multi-cut contour method and a mathematical-finite element model was developed to estimate the uncertainty of results of the multi-cut contour method. In order to study the effect of the friction coefficient on the residual stresses, a 3D finite element model was employed and the results of it were validated with the experimental results of the CGP process. According to the results, residual stresses in the first pass of CGP are compressive on the surface and gradually change to tension at the center of the thickness. Investigation of the effect of the first cut on the residual stresses and uncertainty of the second cutting plane showed that the effect of the first cut is only confined to regions near the intersection of the two cuts. Distancing from the intersection of two cuts causes the effect of the first cut to be ineffective on the second cut. Also, evaluation of the effect of friction coefficient on the residual stress illustrated that friction has a direct relationship with the residual stresses.


2015 ◽  
Vol 19 (1) ◽  
pp. 3-30 ◽  
Author(s):  
Adam Cox

This article tests the impact of match outcome uncertainty on stadium attendance and television audiences of English Premier League football. The method accounts for different measures of outcome uncertainty, an issue identified as a potential source of discord between existing evidence. Results show that more certain matches are preferred by spectators at the stadium yet more uncertain matches are preferred on TV spectators. Thus, a change in revenue sharing polices aimed at promoting a more uncertain match may affect both TV and stadium demand in opposing directions.


2020 ◽  
Vol 58 (11) ◽  
pp. 1829-1835
Author(s):  
Ashley D. Ellis ◽  
Alexander R. Gross ◽  
Jeffrey R. Budd ◽  
W. Greg Miller

AbstractBackgroundClinical laboratories use internal quality control (QC) data to calculate standard deviation (SD) and coefficient of variation (CV) to estimate uncertainty of results and to interpret QC results. We examined the influence of different instruments, and QC and reagent lots on the CV calculated from QC data.MethodsResults for BioRad Multiqual frozen liquid QC samples over a 2-year interval were partitioned by QC and reagent lots. The mean and CV were calculated for each partition for each of three Abbott Architect c8000 instruments for measuring serum alanine amino transferase (ALT), creatinine (enzymatic), glucose and sodium.ResultsCVs differed among partitions and instruments for two QC levels by 5.8- and 3.3-fold for ALT, by 4.7- and 2.1-fold for creatinine, by 2.0- and 2.6-fold for glucose, and by 2.1- and 2.0-fold for sodium. Pooled CVs for two QC levels varied among instruments by 1.78- and 1.11-fold for ALT, by 1.63- and 1.11-fold for creatinine, by 1.08- and 1.06-fold for glucose, and by 1.24- and 1.31-fold for sodium.ConclusionsThe CVs from QC data varied substantially among QC and reagent lots and for different identical specification instruments. The CV used to estimate uncertainty for a measurement result or as the basis for interpreting individual QC results must be derived over a sufficient time interval to obtain a pooled CV that represents “typical” performance of a measuring system. An estimate of uncertainty provided to users of laboratory results will itself have uncertainty that can influence medical decisions.


Author(s):  
K. A. Solidum ◽  
J. A. Principe ◽  
M. R. C. O. Ang

Abstract. The coronavirus disease was discovered in 2019 (COVID-19) and was eventually declared by the World Health Organization (WHO) as a global pandemic on March 11, 2020. This study aims to determine the correlation of Dust Storm Detection (DSD) index from the Fengyun-4A (FY-4A) data, NO2 ground observations, and daily positivity rate of COVID-19 cases in Metro Manila and predict the confirmed daily cases of COVID-19 using the established correlations. FY-4A DSD products were used to obtain different Dust Storm Indices (DSI) and daily COVID-19 confirmed cases were tallied during the period November 01–30, 2020, and March 01–31, 2021. Ground-observed NO2 levels from Environmental Management Bureau (EMB) monitoring stations were gathered for validation and regression analysis. Results of linear regression analysis between the DSI and NO2 exhibited a weak correlation (0.24) with the available observations at the specified period. Ground-observed NO2 levels exhibit the same trend with the daily positivity rate of COVID-19 considering only a smaller area and short period of observations. Moreover, results showed a weak correlation (0.07) between the positivity rate of COVID-19 case as a function of the DSD Index and ground-observed NO2 levels. Uncertainty of results from this study may be attributed to the fact that it has focused on a relatively small area due to limited available ground observations. Therefore, it is recommended to apply the same analysis on different periods of observations using as many NO2 level ground observations as available and determine if variables follow the same trend and correlations as reported in this study.


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