High performance numerical modeling of ultra-short laser pulse propagation based on multithreaded parallel hardware

The focus of this study is development of parallelised version of severely sequential and iterative numerical algorithms based on multi-threaded parallel platform such as a graphics processing unit. This requires design and development of a platform-specific numerical solution that can benefit from the parallel capabilities of the chosen platform. Graphics processing unit was chosen as a parallel platform for design and development of a numerical solution for a specific physical model in non-linear optics. This problem appears in describing ultra-short pulse propagation in bulk transparent media that has recently been subject to several theoretical and numerical studies. The mathematical model describing this phenomenon is a challenging and complex problem and its numerical modeling limited on current modern workstations. Numerical modeling of this problem requires a parallelisation of an essentially serial algorithms and elimination of numerical bottlenecks. The main challenge to overcome is parallelisation of the globally non-local mathematical model. This thesis presents a numerical solution for elimination of numerical bottleneck associated with the non-local nature of the mathematical model. The accuracy and performance of the parallel code is identified by back-to-back testing with a similar serial version

Examining Basss Transformational Leadership In Public Sector Executives: A Psychometric Properties Review

The psychometric properties of the measure of transformational leadership as measured by 20 items in Bass and Avolios Multifactor Leadership Questionnaire (MLQ) (Form 5x) were examined. The examination was based on a sample of 372 chief executives in the United States government

Multi-threaded parallel simulation of non-local non-linear problems in ultrashort laser pulse propagation in the presence of plasma

We describe a parallel multi-threaded approach for high performance modelling of wide class of phenomena in ultrafast nonlinear optics. Specific implementation has been performed using the highly parallel capabilities of a programmable graphics processor

Comparative numerical study of efficiency of energy deposition in femtosecond microfabrication with fundamental and second harmonics of Yb-doped fiber laser

We present the results of comparative numerical study of energy deposition in single shot femtosecond laser inscription for fundamental and second harmonic of Yb-doped fiber laser. We have found that second harmonic is more efficient in absorbing energy which leads to lower inscription threshold. Hence this regime is more attractive for applications in femtosecond laser microfabrication

Quantitative optical coherence tomography for characterization of microscopic structures with varying refractive index

In this paper we have done back to back comparison of quantitive phase and refractive index from a microscopic image of waveguide previously obtained by Allsop et al. Paper also shows microscopic image of the first 3 waveguides from the sample. Tomlins et al. have demonstrated use of femtosecond fabricated artefacts as OCT calibration samples. Here we present the use of femtosecond waveguides, inscribed with optimized parameters, to test and calibrate the sensitivity of the OCT systems

Mapping product and service innovation: A bibliometric analysis and a typology

Research conducted in the innovation field lags behind organizations’ general technological development and innovativeness. Literature that previously depicted innovation types in developed markets is markedly different from progressively publicized emerging market innovation types. While capital-abundant firms tend to engage in respective pioneering and incremental innovation loops, resource-constrained firms and firms in emerging countries may partially free-ride on existing products and services through innovations such as copycat and frugal. To date, there have been no attempts to holistically consolidate product and service innovation types into one overarching typology. Using novel methods of text mining and co-citation analysis, this study systematically maps three decades of product and service innovation scholarship to provide a typology of eight major product and service innovation types. This is further supported by case study analysis to demonstrate how these innovation types fit into the cost vs market novelty matrix. This study is unique in its methodological proposition to systematically review the innovation scholarship of more than 1,400 articles through comprehensive, quantified, and objective methods that offer transparent and reproducible results. The study provides some clarity regarding the classifications and characteristics of the innovation typology

Feedback loops as dynamic processes of organizational knowledge creation in the context of the innovations’ front-end

Feedback loops are instrumental in the organizational knowledge creation (OKC) process across the highly uncertain and dynamic innovation's front‐end. Therefore, managers should be aware of how these loops unfold, how to recognize meaningful patterns and how to steer them towards planned and emergent outcomes. Easy to say, difficult to practise! This empirical paper focuses on knowledge–conceptualization – the new knowledge's generation‐crystallization journey – and develops a unique model of feedback loops as dynamic processes of OKC in the context of the innovations’ front‐end. Using ten qualitatively studied innovations, the authors identify five front‐end OKC stages (generation, evaluation, expansion, refinement and crystallization) and pattern these based on their overlaps to explore the associated feedback loops. This model distinctively illustrates increasing–decreasing, diverging–converging and frequent negative‐cum‐positive loops, and illuminates the complex and rich patterns of loops not captured before