Requirements for a geometry programming language for CFD applications

A number of typical problems faced by the aerodynamicist in using computational fluid dynamics are presented to illustrate the need for a geometry programming language. The overall requirements for such a language are illustrated by examples from the Boeing Aero Grid and Paneling System (AGPS). Some of the problems in building such a system are also reviewed along with suggestions as to what to look for when evaluating new software problems

Human-human haptic collaboration in cyclical Fitts' tasks

Understanding how humans assist each other in haptic interaction teams could lead to improved robotic aids to solo human dextrous manipulation. Inspired by experiments reported in Reed et al. (2004), which suggested two-person haptically interacting teams could achieve a lower movement time (MT) than individuals for discrete aiming movements of specified accuracy, we report that two-person teams (dyads) can also achieve lower MT for cyclical, continuous aiming movements. We propose a model, called endpoint compromise, for how the intended endpoints of both subjects' motion combine during haptic interaction; it predicts a ratio of /spl radic/2 between slopes of MT fits for individuals and dyads. This slope ratio prediction is supported by our data

Monitoring tropical cyclone intensity using wind fields derived from short-interval satellite images

Rapid scan visible images from the Visible Infrared Spin Scan Radiometer sensor on board SMS-2 and GOES-1 were used to derive high resolution upper and lower tropospheric environmental wind fields around three western Atlantic tropical cyclones (1975-78). These wind fields were used to derive upper and lower tropospheric areal mean relative vorticity and their differences, the net relative angular momentum balance and upper tropospheric mass outflow. These kinematic parameters were shown by studies using composite rawinsonde data to be strongly related to tropical cyclone formation and intensity changes. Also, the role of forced synoptic scale subsidence in tropical cyclone formation was examined. The studies showed that satellite-derived lower and upper tropospheric wind fields can be used to monitor and possibly predict tropical cyclone formation and intensity changes. These kinematic analyses showed that future changes in tropical cyclone intensity are mainly related to the "spin-up" of the storms by the net horizontal transport of relative angular momentum caused by convergence of cyclonic vorticity in the lower troposphere and to a lesser extent the divergence of anticyclone vorticity in the upper troposphere

The mysterious case of Aafia Siddiqui : Gothic intertextual analysis of neo-Orientalist narratives

When Aafia Siddiqui ‘disappeared’ from her upper-middle class life in Boston in 2003 due to accusations that she was involved in al Qaeda, competing narratives from the US government, media, and her family emerged striving to convince the American public of her guilt or innocence. These narratives were rooted in a gendered form of neo-Orientalism that informed and structured the War on Terror. The narratives, of innocent Soccer Mom, nefarious Lady al Qaeda, and mentally fragile Grey lady, sought to explain how a well-educated woman could possibly be involved with a terrorist organisation. This article uses intertextual analysis to draw parallels between Gothic literature and the Siddiqui narratives. Gothic literature’s dependency upon gendered unease is particularly evident in the Siddiqui narratives, which then reveal the uncertainties within the War on Terror, particularly those related to American exceptionalism.PostprintPeer reviewe

A qualitative exploration of consumers’ perceived impacts, behavioural reactions, and future reflections of the EU Tobacco Products Directive (2017) as applied to electronic cigarettes

Background: Electronic cigarette regulations included in the Tobacco Products Directive (TPD), Article 20, implemented in Europe by May 2017, aimed to improve safety for e-cigarette consumers, and prevent uptake among non-smokers, particularly young people. Before implementation, there were significant concerns from consumers, industry, and some in the scientific community about the potential negative impact of the TPD on people using e-cigarettes to stay stopped from smoking. To date, there is limited evidence on how the TPD has affected consumers. This study aimed to add insight into how consumers perceived and experienced the regulations. Methods: Qualitative data, collected between March 2018 and March 2019, relating to participant views of the TPD were extracted from 160 interviews/extended surveys of e-cigarette consumers as part of a wider study into e-cigarette use trajectories (ECtra study). Data were thematically analysed. Results: Awareness of the TPD amongst consumers was not universal. Participants’ smoking behaviour did not appear to be influenced by the legislation. Participants were reassured by manufacturing regulations and requirements for ingredients labels. Participants responded negatively to changes perceived to cause inconvenience and extra plastic waste. The product restrictions prompted some participants to purchase non-compliant products illegally, potentially putting their safety at risk. Conclusions: E-cigarette regulation should focus on ensuring product safety. Raising awareness of the TPD amongst consumers and smokers could be beneficial

Predicting tropical cyclone intensity using satellite measured equivalent blackbody temperatures of cloud tops

A regression technique was developed to forecast 24 hour changes of the maximum winds for weak (maximum winds less than or equal to 65 Kt) and strong (maximum winds greater than 65 Kt) tropical cyclones by utilizing satellite measured equivalent blackbody temperatures around the storm alone and together with the changes in maximum winds during the preceding 24 hours and the current maximum winds. Independent testing of these regression equations shows that the mean errors made by the equations are lower than the errors in forecasts made by the peristence techniques

The role of the equivalent blackbody temperature in the study of Atlantic Ocean tropical cyclones

Satellite measured equivalent blackbody temperatures of Atlantic Ocean tropical cyclones are used to investigate their role in describing the convection and cloud patterns of the storms and in predicting wind intensity. The high temporal resolution of the equivalent blackbody temperature measurements afforded with the geosynchronous satellite provided sequential quantitative measurements of the tropical cyclone which reveal a diurnal pattern of convection at the inner core during the early developmental stage; a diurnal pattern of cloudiness in the storm's outer circulation throughout the life cycle; a semidiurnal pattern of cloudiness in the environmental atmosphere surrounding the storms during the weak storm stage; an outward modulating atmospheric wave originating at the inner core; and long term convective bursts at the inner core prior to wind intensification

Consensus as a Form of Decision Making

This paper critically analyzes the consensus process as used in decision making. Drawing from the Quaker experience and from social psychological research, statements of conditions for its effective use are enunciated. Descriptions of the use of consensus are provided and areas for further exploration are identified

Penalized mixed-effects ordinal response models for high-dimensional genomic data in twins and families

The Brisbane Longitudinal Twin Study (BLTS) was being conducted in Australia and was funded by the US National Institute on Drug Abuse (NIDA). Adolescent twins were sampled as a part of this study and surveyed about their substance use as part of the Pathways to Cannabis Use, Abuse and Dependence project. The methods developed in this dissertation were designed for the purpose of analyzing a subset of the Pathways data that includes demographics, cannabis use metrics, personality measures, and imputed genotypes (SNPs) for 493 complete twin pairs (986 subjects.) The primary goal was to determine what combination of SNPs and additional covariates may predict cannabis use, measured on an ordinal scale as: “never tried,” “used moderately,” or “used frequently”. To conduct this analysis, we extended the ordinal Generalized Monotone Incremental Forward Stagewise (GMIFS) method for mixed models. This extension includes allowance for a unpenalized set of covariates to be coerced into the model as well as flexibility for user-specified correlation patterns between twins in a family. The proposed methods are applicable to high-dimensional (genomic or otherwise) data with ordinal response and specific, known covariance structure within clusters

The Social Psychology of Small Groups: Relevancy of Social Work Practice with Groups

Inclusion from the social sciences to broaden the knowledge base of social work is an accepted fact. In the professions\u27 experience with group practice such reliance is not new, and extends at least to the efforts of Coyle who saw the usefulness of the small group field in social psychology as early as 1930. More recently, Hartford\u27s book provides a text which bridges small group theory and social work practice with groups. An examination of diverse conceptualizations of group practice reveals differential reliance upon small group findings. As the small group is increasingly chosen as the context and means for change, it would appear that this one major knowledge source from the social sciences, namely, the small group field, should be examined critically. Scarcity of this knowledge is not at issue, but the extent to which it is directly usable in practice for such diverse purposes as: (1) a means for changing individual behaviors; (2) a social unit engaged in neighborhood and/or community development; (3) task units within organizational contexts may be at issue. This article examines knowledge generated by the small group field within social psychology which should provide guidelines for continued use of findings, directions and cautions for research in social work, and a sociological perspective from which to view knowledge building efforts within social work. Critiques and consequences of practitioners drawing exclusively from psychoanalytic theory for explanations of phenomena and change strategies for diverse purposes are well known to those who primarily engage in dyadic interaction. Given this historical event, a look at the social psychology of the small group field is particularly timely as an initial attempt to develop a spirit of intellectual inquiry at least into one area of imported knowledge. Using two sets of analytical concepts, the culture of the small group field is described. Findings are presented which suggest that the social context in which a researcher works interacts with and effects the results. Subsequently, certain socio-historical influences are extrapolated which appear to shape knowledge produced by the small group field. Two are selected; namely, the influence of wars and the influence of big business and industry. Relationships between these sociohistorical influences and knowledge building in the small group field are examined. Finally, implications are drawn for social work. It is assumed that the genesis of knowledge is socially conditioned, and, as Mannhe m suggested,the development of knowledge also is influenced by social processes