Multiple Uncertainties in Time-Variant Cosmological Particle Data

Though the mediums for visualization are limited, the potential dimensions of a dataset are not. In many areas of scientific study, understanding the correlations between those dimensions and their uncertainties is pivotal to mining useful information from a dataset. Obtaining this insight can necessitate visualizing the many relationships among temporal, spatial, and other dimensionalities of data and its uncertainties. We utilize multiple views for interactive dataset exploration and selection of important features, and we apply those techniques to the unique challenges of cosmological particle datasets. We show how interactivity and incorporation of multiple visualization techniques help overcome the problem of limited visualization dimensions and allow many types of uncertainty to be seen in correlation with other variables

Natural Visualizations

This paper demonstrates the prevalence of a shared characteristic between visualizations and images of nature. We have analyzed visualization competitions and user studies of visualizations and found that the more preferred, better performing visualizations exhibit more natural characteristics. Due to our brain being wired to perceive natural images [SO01], testing a visualization for properties similar to those of natural images can help show how well our brain is capable of absorbing the data. In turn, a metric that finds a visualization’s similarity to a natural image may help determine the effectiveness of that visualization. We have found that the results of comparing the sizes and distribution of the objects in a visualization with those of natural standards strongly correlate to one’s preference of that visualization

On transverse momentum event–by–event fluctuations in string hadronic models

Transverse momentum event-by-event fluctuations are studied within the string-hadronic model of high energy nuclear collisions, LUCIAE. Data on non-statistical pT fluctuations in p+p interactions are reproduced. Fluctuations of similar magnitude are predicted for nucleus-nucleus collisions, in contradiction to the preliminary NA49 results. The introduction of a string clustering mechanism (Firecracker Model) leads to a further, significant increase of pT fluctuations for nucleus-nucleus collisions. Secondary hadronic interactions, as implemented in LUCIAE, cause only a small reduction of pT fluctuations

Board structure and supplementary commentary on the primary financial statements

Purpose: This research investigates the relationship between the extent and focus of supplementary narrative commentary (SNC) on amounts reported in the primary financial statements and board structure variables. Design/Methodology/Approach: The study uses the disclosure index methodology to measure the extent of SNC in annual reports of 167 FTSE 250 companies. Ordinary Least Squares (OLS) regression analysis is employed to examine the association between the extent and focus of SNC and board structure variables. Findings: The findings show that the extent of SNC on amounts reported in the primary financial statements is about 30%, suggesting that companies provide commentary on a small number of amounts reported in the financial statements. In terms of focus of SNC, companies provide greater SNC on amounts in the income statement relative to the balance sheet. The regression results indicate that the extent of SNC is negatively associated with board size, and positively associated with audit committee independence and financial expertise. Focus of SNC is negatively related to audit committee independence and finance expertise. Originality/Value: The research contributes to both the voluntary disclosure and impression management literature streams. The findings provide evidence of the extent and focus of SNC on amounts in the financial statements. They also demonstrate that board structure variables are related to the extent and focus of SNC on amounts in primary financial statements. These findings have implications for policy makers who have responsibilities for ensuring that users of annual reports receive adequate information to make decisions

Capital market pressures and the format of intellectual capital disclosure in intellectual capital intensive firms

Purpose - A number of studies have examined firms’ intellectual capital (IC) disclosure practices. However, the presentation format of IC disclosure (text, numerical and graphs/pictures) is yet to be examined. In addition, there is little evidence on the impact of capital market pressures on IC disclosure. This study aims to examine the relation between presentation format of IC disclosures and three market factors (market-to-book ratio, share price volatility and multiple listing. Design/methodology/approach - Using content analysis, we examine the level of IC disclosure provided in the annual reports of 100 IC-intensive listed UK firms. A 61-IC-item research instrument is used to measure IC disclosure and regression analysis is employed to examine the relation between disclosure and the market factors, controlling for corporate governance and firm specific variables. Findings - Text is the most commonly used format for IC disclosure, whilst the use of graphs/pictures is very low. The findings of the relation between market factors and IC disclosure are mixed. Market-to-book ratio is significantly related to disclosure in text and numerical, but not to graphs/pictures. Share price volatility is only associated with graphs/pictures, whilst multiple listing is only related to text. Originality/value - Our findings suggest that the impact of capital market pressures on IC disclosure might differ with presentation format. In this context, the study makes a significant contribution to the IC disclosure literature

Influence of convection and biomass burning outflow on tropospheric chemistry over the tropical Pacific

Observations over the tropics from the Pacific Exploratory Mission-Tropics A Experiment are analyzed using a one-dimensional model with an explicit formulation for convective transport. Adopting tropical convective mass fluxes from a general circulation model (GCM) yields a large discrepancy between observed and simulated CH3I concentrations. Observations of CH3I imply the convective mass outflux to be more evenly distributed with altitude over the tropical ocean than suggested by the GCM. We find that using a uniform convective turnover lifetime of 20 days in the upper and middle troposphere enables the model to reproduce CH3I observations. The model reproduces observed concentrations of H2O2 and CH3OOH. Convective transport of CH3OOH from the lower troposphere is estimated to account for 40-80% of CH3OOH concentrations in the upper troposphere. Photolysis of CH3OOH transported by convection more than doubles the primary HOx source and increases OH concentrations and O3 production by 10-50% and 0.4 ppbv d-1, respectively, above 11 km. Its effect on the OH concentration and O3 production integrated over the tropospheric column is, however, small. The effects of pollutant import from biomass burning regions are much more dominant. Using C2H2 as a tracer, we estimate that biomass burning outflow enhances O3 concentrations, O3 production, and concentrations of NOx and OH by 60%, 45%, 75%, and 7%, respectively. The model overestimates HNO3 concentrations by about a factor of 2 above 4 km for the upper one-third quantile of C2H2 data while it generally reproduces HNO3 concentrations for the lower and middle one-third quantiles of C2H2 data. Copyright 2000 by the American Geophysical Union

Reflections on Skipping Stones to Diving Deep: The Process of Immersion as a Practice

Reflecting upon over 30 years of teaching courses with a community service-learning and engagement component, this article is a personal piece that explores the author’s journey through voluntarism, community service-learning and civic engagement, and how that path has led to embracing immersion as a critical pedagogical practice for community engagement

The Origin of Language: A Perspective of Meditation Shifting Towards Needs Satisfaction

This paper discusses the origin of language from the perspective of meditation towards the needs satisfaction of communication Labor played a crucial part in the creation and shaping of man himself and his body parts and also in the creation of language Labor forced man to meditate on the void left between what he needed and the means to satisfy his needs Man shifted his meditation from the needs to needs satisfaction which resulted in the creation of tools typical representatives of human culture The ability to shift meditation towards tool making is a prelude to the creation of language The ability to conduct meditation shifting is what distinguishes man from other animals This ability has been woven into the genetic structure of man and has become man s innate trai