Search results for "graphics"

Quantification of DNA and RNA: a Quantitative Visual Comparison

2002

The analytical procedure for the quantification of DNA and RNA described is the quantitative visual comparison of an unknown sample with known standards. This is quick and easy to do, suitable for amounts of sample as small as 10 ng. Keywords: DNA; RNA; rapid quantification

Random quasi-phase-matched second harmonic generation in periodically poled lithium tantalate

2009

We experimentally observed and explained bulk second harmonic generation via random quasi-phase-matching, derived from a periodically poled lithium tantalate sample with a randomly patterned mark-to-space-ratio.

Impact of Wavelet Kernels on Predictive Capability of Radiomic Features: A Case Study on COVID-19 Chest X-ray Images

2023

Radiomic analysis allows for the detection of imaging biomarkers supporting decision-making processes in clinical environments, from diagnosis to prognosis. Frequently, the original set of radiomic features is augmented by considering high-level features, such as wavelet transforms. However, several wavelets families (so called kernels) are able to generate different multi-resolution representations of the original image, and which of them produces more salient images is not yet clear. In this study, an in-depth analysis is performed by comparing different wavelet kernels and by evaluating their impact on predictive capabilities of radiomic models. A dataset composed of 1589 chest X-ray ima…

The primary structural photoresponse of phytochrome proteins captured by a femtosecond X-ray laser

2020

Please check the README file for more information about the dataset.

GPU accelerated Monte Carlo simulations of lattice spin models

2011

We consider Monte Carlo simulations of classical spin models of statistical mechanics using the massively parallel architecture provided by graphics processing units (GPUs). We discuss simulations of models with discrete and continuous variables, and using an array of algorithms ranging from single-spin flip Metropolis updates over cluster algorithms to multicanonical and Wang-Landau techniques to judge the scope and limitations of GPU accelerated computation in this field. For most simulations discussed, we find significant speed-ups by two to three orders of magnitude as compared to single-threaded CPU implementations.

Creative interpretation in web design experience

2017

Insight into how people mentally represent, and thus, make sense of visual designs is the key to understanding how people interact with technological devices. This paper presents a study in which participants were asked to write their interpretations of two webpage design examples, based on what they thought they would say and what would remain as a thought. The data comprised 80 3E templates (N = 40), a template allowing participants to express experiences through writing and drawing. Inductive data analysis through a phenomenological lens revealed that supposed mental and verbal representations concentrated on the following design properties: colors, themes, interface layout and quality, …

Tradition and virtuality: The Caltagirone staircase

2006

OntoSTEP: Enriching product model data using ontologies

2012

The representation and management of product lifecycle information is critical to any manufacturing organization. Different modeling languages are used at different lifecycle stages, for example STEP's EXPRESS may be used at a detailed design stage, while UML may be used for initial design stages. It is necessary to consolidate product information created using these different languages to build a coherent knowledge base. In this paper, we present an approach to enable the translation of STEP schema and its instances to Ontology Web Language (OWL). This gives a model-which we call OntoSTEP-that can easily be integrated with any OWL ontologies to create a semantically rich model. As an examp…

Approximation of pore space with ellipsoids: a comparison of a geometrical method with a statistical one.

2018

International audience; We work with tomographic images of pore space in soil. The images have large dimensions and so in order to speed-up biological simulations (as drainage or diffusion process in soil), we want to describe the pore space with a number of geometrical primitives significantly smaller than the number of voxels in pore space. In this paper, we use the curve skeleton of a volume to segment it into some regions. We describe the method to compute the curve skeleton and to segment it with a simple segment approximation. We approximate each obtained region with an ellipsoid. The set of final ellipsoids represents the geometry of pore space and will be used in future simulations.…

It Wetted my Appetite! Demographic Differences in Perceiving Gastronomy Content on Social Media : A Study of Fast Foods Restaurants in Port Harcourt

2017

Fast food chains have emerged to be a dominant sector in the Nigerian retail industry, contributing to employment generation and the nation’s GDP. In the face of dynamic competitive business landscape, this sector has continuously relied on the traditional method of communicating, engaging and retaining customers. This anachronistic approach has cut them from a profitable customer segment which relies heavily on ICT tools such as social media. Thus, the aim of this study is to examine the differences in the rate fast food chains utilize social media through professionally handling posting of gastronomy content on their social media pages. Utilising gastronomy as an emerging concept and/or t…