699 research outputs found
Viscoelastic behaviour and fracture toughness of linear-low-density polyethylene reinforced with synthetic boehmite alumina nanoparticles
Uma perspectiva naturalista do usuário de design
Este estudo reúne uma série de informações sobre design centrado no usuário e naturalismo. Através da compilação e análise de dados bibliográficos, breves conhecimentos sobre cada tema foram relacionados com o intuito de apresentar uma perspectiva naturalista do usuário de produtos de design. O método de pesquisa utilizado foi a investigação bibliográfica, que abrange as áreas de design, design centrado no usuário e naturalismo filosófico. Exemplificando as relações entre essas áreas, alguns conhecimentos obtidos pela neurociência fornecem uma perspectiva naturalista do usuário de design, de modo a mostrar como fatores biológicos podem influenciar sua interação com objetos de design.Abstract: This study collects a range of information about user-centered design and naturalism. Through the compilation and analysis of bibliographic data, brief knowledge of each theme were related to present a naturalistic perspective of the user of design products. The research method employed was a bibliographic search, covering the areas of design, user-centered design and philosophical naturalism. Exemplifying the relations between these areas, some knowledge from neuroscience provide a naturalistic perspective of the user of design products, in order to show how biological factors influence his interaction with design objects
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Improving Desert Locust Decision Support in Africa and Asia Using SMAP Soil Moisture Estimates
In the desert areas from northern Africa to East Asia, occasional rainfall in hyper-arid environments results in the development of vegetation that harbor destructive swarms of Desert Locusts (DL). The UN Food and Agriculture Organization (FAO) has developed a Decision Support System (DSS) for monitoring Desert Locust events based on remotely sensed precipitation and vegetation estimates. However, the precipitation data applied by the FAO DSS have been shown to have a low probability of detection in this area leading to high uncertainty in their DL forecasts. We demonstrate the correspondence of AMSR-E soil moisture anomalies with observed Desert Locust events in north Africa and southwest Asia. This relationship enables an improvement to the existing FAO DL Decision Support System through the addition of expected SMAP products which will provide similar soil moisture products to AMSR-E, but at higher spatial resolution. The SMAP rootzone soil moisture product (L4_SM) will be particularly useful in this regard
Editorial: crime patterns in time and space: the dynamics of crime opportunities in urban areas
The routine activity approach and associated crime pattern theory emphasise how crime emerges from spatio-temporal routines. In order to understand this crime should be studied in both space and time. However, the bulk of research into crime patterns and related activities has investigated the spatial distributions of crime, neglecting the temporal dimension. Specifically, disaggregation of crime by place and by time, for example hour of day, day of week, month of year, season, or school day versus none school day, is extremely relevant to theory. Modern data make such spatio-temporal disaggregation increasingly feasible, as exemplified in this special issue. First, much larger data files allow disaggregation of crime data into temporal and spatial slices. Second, new forms of data are generated by modern technologies, allowing innovative and new forms of analyses. Crime pattern analyses and routine activity inquiries are now able to explore avenues not previously available. The unique collection of nine papers in this thematic issue specifically examine spatio-temporal patterns of crime to; demonstrate the value of this approach for advancing knowledge in the field; consider how this informs our theoretical understanding of the manifestations of crime in time and space; to consider the prevention implications of this; and to raise awareness of the need for further spatio-temporal research into crime event
Local critical behaviour at aperiodic surface extended perturbation in the Ising quantum chain
The surface critical behaviour of the semi--infinite one--dimensional quantum
Ising model in a transverse field is studied in the presence of an aperiodic
surface extended modulation. The perturbed couplings are distributed according
to a generalized Fredholm sequence, leading to a marginal perturbation and
varying surface exponents. The surface magnetic exponents are calculated
exactly whereas the expression of the surface energy density exponent is
conjectured from a finite--size scaling study. The system displays surface
order at the bulk critical point, above a critical value of the modulation
amplitude. It may be considered as a discrete realization of the Hilhorst--van
Leeuwen model.Comment: 13 pages, TeX file + 6 figures, epsf neede
Sea-Salt Aerosol Generation Events in Venice (Italy) During the Sea/Land Breezes Season a Multivariate Statistical Approach Coupled with Wind Speed and Direction
Automated Refactoring of Object Oriented Code into Aspects
This paper presents a human-guided automated approach to refactoring object oriented programs to the aspect oriented paradigm. The approach is based upon the iterative application of four steps: discovery, enabling, selection, and refactoring. After discovering potentially applicable refactorings, the enabling step transforms the code to improve refactorability. During the selection phase the particular refactorings to apply are chosen. Finally, the refactoring phase transforms the code by moving the selected code to a new aspect. This paper presents the results of an evaluation in which one of the crosscutting concerns of a 40,000 LoC program (JHotDraw) is refactore
Atmospheric Aerosol at the Svalbard Islands in Year 2010. A Preliminary Analysis of Multielemental Data from Size-Segregated Samples: (III) Crustal Elements and Minor Elements
Role of Estrogen and Estrogen Receptor in GH-Secreting Adenomas
Acromegaly is a rare disease with several systemic complications that may lead to increased overall morbidity and mortality. Despite several available treatments, ranging from transsphenoidal resection of GH-producing adenomas to different medical therapies, complete hormonal control is not achieved in some cases. Some decades ago, estrogens were first used to treat acromegaly, resulting in a significant decrease in IGF1 levels. However, due to the consequent side effects of the high dose utilized, this treatment was later abandoned. The evidence that estrogens are able to blunt GH activity also derives from the evidence that women with GH deficiency taking oral estro-progestins pills need higher doses of GH replacement therapy. In recent years, the role of estrogens and Selective Estrogens Receptor Modulators (SERMs) in acromegaly treatment has been re-evaluated, especially considering poor control of the disease under first- and second-line medical treatment. In this review, we analyze the state of the art concerning the impact of estrogen and SERMs on the GH/IGF1 axis, focusing on molecular pathways and the possible implications for acromegaly treatment
Atmospheric Aerosol at the Svalbard Islands in Year 2010. A Preliminary Analysis of Multielemental Data from Size-Segregated Samples: (I) Sea-Salt Components
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