oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2019 ( 7 )

2018 ( 73 )

2017 ( 62 )

2016 ( 88 )

Custom range...

Search Results: 1 - 10 of 28029 matches for " Robert Thomson "
All listed articles are free for downloading (OA Articles)
Page 1 /28029
Display every page Item
Social Responsibility and Sharing Behaviors Online: The Twitter-Sphere's Response to the Fukushima Disaster
Robert Thomson,Naoya Ito
International Journal of Cyber Society and Education , 2012,
Abstract: This study examines Twitter users' behavioral response to the Fukushima nuclear power plant disaster, namely with regards to the credibility of third-party information shared during the disaster. In the study, 4,950 individual tweets from 2,156 users were categorized, and it was found that generally, changes in proximity to the disaster correlate with a change in the degree to which low-credibility sources are cited. Specifically, users from within Japan were less likely to share information from low-credibility sources, implying a higher sense of social responsibility by those close to the disaster. It was also found that, despite non-disclosure of location correlating with an increase in sharing of information from low-credibility sources, Japanese tweeters, who were typified by location non-disclosure, did not share this sharing tendency. Implications from an online behavior perspective are discussed.
PhyLIS: A Simple GNU/Linux Distribution for Phylogenetics and Phyloinformatics
Robert C. Thomson
Evolutionary Bioinformatics , 2009,
Abstract: PhyLIS is a free GNU/Linux distribution that is designed to provide a simple, standardized platform for phylogenetic and phyloinformatic analysis. The operating system incorporates most commonly used phylogenetic software, which has been pre-compiled and pre-configured, allowing for straightforward application of phylogenetic methods and development of phyloinformatic pipelines in a stable Linux environment. The software is distributed as a live CD and can be installed directly or run from the CD without making changes to the computer. PhyLIS is available for free at http://www.eve.ucdavis.edu/rcthomson/phylis/.
PhyLIS: A Simple GNU/Linux Distribution for Phylogenetics and Phyloinformatics
Robert C. Thomson
Evolutionary Bioinformatics , 2009,
Abstract: PhyLIS is a free GNU/Linux distribution that is designed to provide a simple, standardized platform for phylogenetic and phyloinformatic analysis. The operating system incorporates most commonly used phylogenetic software, which has been pre-compiled and pre-configured, allowing for straightforward application of phylogenetic methods and development of phyloinformatic pipelines in a stable Linux environment. The software is distributed as a live CD and can be installed directly or run from the CD without making changes to the computer. PhyLIS is available for free at http://www.eve.ucdavis.edu/rcthomson/phylis/.
Observation of localized flat-band modes in a quasi-one-dimensional photonic rhombic lattice
Sebabrata Mukherjee,Robert R. Thomson
Physics , 2015, DOI: 10.1364/OL.40.005443
Abstract: We experimentally demonstrate the photonic realization of a dispersionless flat-band in a quasi-one-dimensional photonic lattice fabricated by ultrafast laser inscription. In the nearest neighbor tight binding approximation, the lattice supports two dispersive and a non-dispersive (flat) band. We experimentally excite superpositions of flat-band eigen modes at the input of the photonic lattice and show the diffractionless propagation of the input states due to their infinite effective mass. In the future, the use of photonic rhombic lattices, together with the successful implementation of a synthetic gauge field, will enable the observation of Aharonov-Bohm photonic caging.
Rapid progress on the vertebrate tree of life
Robert C Thomson, H Bradley Shaffer
BMC Biology , 2010, DOI: 10.1186/1741-7007-8-19
Abstract: Using an automated phylogenetic approach, we analyse all available molecular data for a large sample of vertebrate diversity, comprising nearly 12,000 species and 210,000 sequences. Our results indicate that progress has been rapid, increasing polynomially during the age of molecular systematics. It is also skewed, with birds and mammals receiving the most attention and marine organisms accumulating far fewer data and a slower rate of increase in phylogenetic resolution than terrestrial taxa. We analyse the contributors to this phylogenetic progress and make recommendations for future work.Our analyses suggest that a large majority of the vertebrate tree of life will: (1) be resolved within the next few decades; (2) identify specific data collection strategies that may help to spur future progress; and (3) identify branches of the vertebrate tree of life in need of increased research effort.Resolution of a well-resolved phylogeny for all species is a central goal for biology in the 21st century. Inference of this 'tree of life' has far-reaching implications for nearly all fields of biology, from human health to conservation [1]. As efforts have shifted from primarily morphological to molecular approaches, a number of complex methodological issues central to the reconstruction of large phylogenies containing hundreds to thousands of species have been identified and, in some cases, solved [2-4]. At the most basic level, however, progress on the tree of life is limited by data. Both the rates at which DNA sequences are gathered and species are sampled have increased at a dramatic pace, leading to the now well-known exponential accumulation of basepairs in GenBank (Figure 1a) [5]. At the same time, the number of studies that infer and/or apply phylogenies has also grown rapidly (Figure 1b) [6]. While these indications of progress on the tree of life are encouraging, they are indirect and fall short of quantifying the growth of phylogenetic knowledge.GenBank is composed
Maple and other CAS (Computer Algebra Systems) applied to Teaching and Assessing Mathematics
Robert Thomson,Arelli Santaella,Mark W. Boulat
School of Doctoral Studies Journal , 2009,
Abstract: This paper describes the use of specific technological tools that assist students in the development of their mathematical skills. There has been a significant increase in the utilization of technology in the areas of science and mathematics. As students go to college and move into the workforce math skills and technological skills become important components in ensuring job security. Computer algebra systems (CAS) are programs designed for the symbolic manipulation of mathematical objects such as polynomials, integrals, and equations. Typical actions are simplification or expansion of expressions and solving of differential or algebraic equations. Most CAS permit the user to write programs for complex tasks and all features of high-level programming languages are available.The proper use of CAS has been associated with increases in the amount of information that students retain as it relates to mathematics. Computer Algebra Systems play an important role in mathematics particularly as it relates to students and their perceptions about learning Algebra through CAS. Student attitudes toward CAS technology seem to be reflected in the level of mastery associated with certain mathematical concepts and the proper teaching as it relates to the utilization of CAS. As it relates to the current study it was clear from the consideration of previous studies, Saunders (2003) and our work to date that there are a variety of responses to the Maple sessions and CAS as a whole. It is also apparent that different students can have quite different attitudes towards the same activity. As it relates specifically to the maple activities the results indicate however that most students found some benefit in the Maple activities with regard to their mathematical understanding and the visualisation capabilities seemed to once again be significantly useful. Students are generally positive about the motivational impact of the Maple sessions. Many students develop a reasonable level of competence with the basic commands and students are often able to present a correct Maple solution.
Spectrum of imaging and characteristics for liver tumors treated with irreversible electroporation  [PDF]
Robert E. Neal II, Wa Cheung, Helen Kavnoudias, Kenneth R. Thomson
Journal of Biomedical Science and Engineering (JBiSE) , 2012, DOI: 10.4236/jbise.2012.512A102
Abstract:

Therapeutic irreversible electroporation (IRE) is a relatively new technique for targeted tumor ablation. Needle electrodes are placed into or around the targeted region to deliver a series of brief electric pulses that disrupt cell membrane integrity, killing cells in a non-thermal manner that does not affect the extracellular matrix or sensitive structures such as major vasculature and bile ducts; making IRE an advantageous technique, especially for tumors that are unresectable or ineligible for thermal ablation. Here, we present on the imaging findings from IRE liver tumor treatments from ultrasound, computed tomography, magnetic resonance, and positron emission tomography. Imaging aids planning and implementing treatments by visualizing the targeted volume and guiding electrode placement. Immediate changes to the affected IRE region may be observed to verify complete ablation of the tumor with margin during the procedure, and permits follow-up evaluation of clinical outcome. In particular, we present tumor treatments in regions adjacent to sensitive structures that contraindicate thermal therapies.

The Head Stands Accused by the Heart! —Depression and Premature Death from Ischaemic Heart Disease  [PDF]
Wendy Thomson
Open Journal of Depression (OJD) , 2014, DOI: 10.4236/ojd.2014.32008
Abstract: Background: The purpose of this study was to examine whether clinical depression was associated with higher risk of premature death from ischemic heart disease (IHD). Risk for IHD was examined separately by sex and sub-type of depression in a long-term follow-up study spanning 49 years. Method: Patients who were diagnosed with depression in the Chichester/Salisbury Catchment Area Study were followed for 49 years. Observed deaths from IHD prior to the age of 70 were compared with rates that were predicted from historical data on mortality rates from 1960 onwards. Results: Significantly higher rates of death from IHD before the age of 70 were found among males with endogenous depression. Conclusions: The results are discussed in terms of the broader literature on mortality from natural causes among patients with clinical depression. In terms of prevention, the results indicate that patients diagnosed with severe clinical depression particularly men at the very least warrant risk assessment with regard to IHD.
“En ese momento todos estaban contra mí”: momentos críticos en las narrativas de transición de los jóvenes
Rachel Thomson,Robert Bell,Janet Holland,Sheila Henderson
Nómadas , 2000,
Abstract: “Momentos decisivos son ocasiones en las cuales los eventosse unen de forma tal, que el individuo se encuentra ante unaencrucijada en su existencia, o donde una persona adquiereinformación que trae consecuencias decisivas para él o ella”(1991: 113). Estos momentos pueden darse en puntos detransición reconocidos; pero, para Giddens, su importanciaradica en la interacción entre el riesgo y la oportunidad queellos representan, y en la necesidad que tiene el individuo desuperarlos por medio de un proyecto reflexivo del self. Esteproyecto reflexivo, es un proceso de construcción de identidad que acarrea el sostenimiento de una narrativa biográficaque a pesar del riesgo, la incertidumbre y la oportunidad, escoherente si es reexaminada continuamente.“Fateful moments are times when events come together insuch a way that an individual stands, as it were, at a crossroads in his existence; or where a person learns ofinformation with fateful consequences” (Giddens, 1991:113). These moments can occur at recognized transitionpoints, but for Giddens their importance lies in theinteraction of risk and opportunity which they represent,and the need for the individual to surmount them througha reflexive project of self. This reflexive project, a processof identity construction, entails sustaining a coherent, ifcontinuously revised, biographical narrativein the face of risk, uncertaintyand opportunity.
Ultrafast laser inscription: an enabling technology for astrophotonics
Robert R. Thomson,Ajoy K. Kar,Jeremy Allington-Smith
Physics , 2009, DOI: 10.1364/OE.17.001963
Abstract: The application of photonics to astronomy offers major advantages in the area of highly-multiplexed spectroscopy, especially when applied to extremely large telescopes. These include the suppression of the near-infrared night-sky spectrum [J. Bland-Hawthorn et al, Opt. Express 12, 5902 (2004), S. G. Leon-Saval et al, Opt. Lett. 30, 2545 (2005)] and the miniaturisation of spectrographs so that they may integrated into the light-path of individual spatial samples [J. Bland-Hawthorn et al, Proc SPIE 6269, 62690N (2006)]. Efficient collection of light from the telescope requires multimode optical fibres and three-dimensional photonic devices. We propose ultrafast laser inscription (ULI) [R. R. Thomson et al, Opt. Express 15, 11691 (2007)] as the best technology to fabricate 3D photonic devices for astrophotonic applications.
Page 1 /28029
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.