University of Portsmouth

About: University of Portsmouth is a education organization based out in Portsmouth, Portsmouth, United Kingdom. It is known for research contribution in the topics: Population & Galaxy. The organization has 5452 authors who have published 14256 publications receiving 424346 citations. The organization is also known as: Portsmouth and Gosport School of Science and Art & Portsmouth and Gosport School of Science and the Arts.

Advances in data stream mining

Abstract: Mining data streams has been a focal point of research interest over the past decade. Hardware and software advances have contributed to the significance of this area of research by introducing faster than ever data generation. This rapidly generated data has been termed as data streams. Credit card transactions, Google searches, phone calls in a city, and many others are typical data streams. In many important applications, it is inevitable to analyze this streaming data in real time. Traditional data mining techniques have fallen short in addressing the needs of data stream mining. Randomization, approximation, and adaptation have been used extensively in developing new techniques or adopting exiting ones to enable them to operate in a streaming environment. This paper reviews key milestones and state of the art in the data stream mining area. Future insights are also be presented.

A pragmatist argument for mixed methodology in medical informatics

Abstract: The aim of this article is to advance the case of pragmatism as a research philosophy and to illustrate its applicability as a mixed methodology perspective in medical informatics Epistemology is empirical not foundational Pragmatism offers a practical starting point for a pluralist methodology Medical practice is pragmatist, empirical, and situated Medical informatics is a hybrid sociotechnical field that requires multimethod research

Do people avoid sitting next to someone who is facially disfigured

Abstract: Most psychological research on the social effects of facial appearance has compared ‘normal’ with attractive faces whereas little work has been concerned with the possible differences in reactions to disfigured and ‘normal’ faces. Yet many cranio-facial surgeons wish to know whether their disfigured patients are reporting reality when they complain that members of the public avoid or react negatively to them. This study finds that people travelling on a suburban railway significantly avoided sitting next to someone who appeared to have a facial port-wine stain. It is concluded that facially disfigured people's accounts of avoidant behaviour towards them are probably the results of correct perceptions.

Biomedical applications of polyurethane materials and coatings

Abstract: Polyurethanes (PUs), formed by the reaction of diisocyanates with polyols (or equivalent) in the presence of a catalyst, have a wide variety of industrial uses. Much recent attention has focused on...

Genetic constraints predict evolutionary divergence in Dalechampia blossoms.

Abstract: If genetic constraints are important, then rates and direction of evolution should be related to trait evolvability. Here we use recently developed measures of evolvability to test the genetic constraint hypothesis with quantitative genetic data on floral morphology from the Neotropical vine Dalechampia scandens (Euphorbiaceae). These measures were compared against rates of evolution and patterns of divergence among 24 populations in two species in the D. scandens species complex. We found clear evidence for genetic constraints, particularly among traits that were tightly phenotypically integrated. This relationship between evolvability and evolutionary divergence is puzzling, because the estimated evolvabilities seem too large to constitute real constraints. We suggest that this paradox can be explained by a combination of weak stabilizing selection around moving adaptive optima and small realized evolvabilities relative to the observed additive genetic variance.