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Browsing Department of Physical Science by Publication Date

Browsing Department of Physical Science by Publication Date

Now showing items 41-60 of 78

Scene-Specific Dark Channel Prior for Single Image Fog Removal

Anparasy, Sivaanpu; Kokul, Thanikasalam (University of Colombo School of Computing, 31-07-21)

Extensive presence of fog in outdoor images severely alters the scene appearance and hence reduces the visibility. Image processing based defogging algorithms are used to restore the details and colour in a single foggy ...
Performance of Existing Biased Estimators and the Respective Predictors in a Misspecified Linear Regression Model

Kayanan, M.; Wijekoon, P. (Scientific Research Publishing, 31-10-17)

In this paper, the performance of existing biased estimators (Ridge Estimator (RE), Almost Unbiased Ridge Estimator (AURE), Liu Estimator (LE), Almost Unbiased Liu Estimator (AULE), Principal Component Regression Estimator ...
A Novel White Matter Fibre Tracking Algorithm using Probabilistic Tractography and Average Curves

Nagulan, R.; Andrew, S.; Oleg, D.; Ali, H. (Springer Berlin/Heidelberg MICCAI, 2010)

This paper presents a novel white matter fibretractography approach using average curves of probabilistic fibre tracking measures. We compute”representative” curves from the original probabilistic curve-set using two ...
Probabilistic Clustering and Shape Modelling of White Matter Fibre Bundles using Regression Mixtures.

Nagulan, R.; Andy, S.; Ali, H. (Springer Berlin/Heidelberg MICCAI, 2011)

We present a novel approach for probabilistic clustering of white matter fibre pathways using curve-based regression mixture modelling techniques in 3D curve space. The clustering algorithm is based on a principled method ...
A novel approach for improved tractography and quantitative analysis of probabilistic fibre tracking curves

Nagulan, R.; Andrew, S.; Oleg, D.; Ali, H. (ElSEVIER/Medical image Analysis, 2012-01)

This paper presents a novel approach for improved diffusion tensor fibretractography, aiming to tackle a number of the limitations of current fibre tracking algorithms, and describes a quantitative analysis tool for ...
Neuroimaging assessment of spasticity developed after acquired brain injuries and multiple sclerosis

Bertoni, M.A.; Sakel, M.; Hojjattoleslami, A.; Bertoni, I.V.; Nagulan, R. (Centauro/ Neuroradiology Journal, 2012-07)

This study evaluated whether different imaging techniques correlate with specific variables routinely used to grade the types and complexities of patient conditions in neurorehabilitation services and their clinical outcomes, ...
Service Prioritization in Node-Disjoint Routing For Adhoc Networks Based On QoS

Suthaharan, S (International Journals of Scientific Knowledge (IJSK), 2013)

Ad hoc network (MANET) is a collection of mobile nodes that can communicate with each other without using any fixed infrastructure. To support multimedia applications such as video and voice MANETs require an efficient ...
Partial Functionality and Service Worthiness in Comprehensive Networked Virtual Environment

Suthaharan, S.; Kuhanesan, S. (International Journals of Scientific Knowledge (IJSK), 2013)

Middleware services for management of shared state in comprehensive distributed interactive applications with partial functionality and network virtual environment (NVEs). This research section introduces some mechanisms ...
A Novel Routing Scheme Based on Protection Mechanism to Discover Unconventional Disjoint Path in Adhoc Wireless Networks

Suthaharan, S (International Journal of Computational Intelligence and Informatics (IJCII), 2013)

The performances of the routing protocols are important since they compute the primary path between source and destination. In addition, routing protocols need to detect failure within a short period of time when nodes ...
Two-Tensor Model-Based Bootstrapping on Classified Tensor Morphologies: Estimation of Uncertainty in Fibre Orientation and Probabilistic Tractography

Nagulan, R.; Simmons, A.; Bertoni, M.; Ali, H. (ElSEVIER/Megnetic Resonance Imaging, 2013-02)

In this manuscript, fast and clinically feasible model-based bootstrapping algorithms using a geometrically constrained two-tensor diffusion model are employed for estimating uncertainty in fiber orientation. A Monte-Carlo-based ...
Structural connectivity asymmetry in the neonatal brain

Nagulan, R.; Graboi, Anne Rifkin; Fortier, M.V.; Chong, Y.S.; Kwek, K.; Saw, Seang-Mei; Godfrey, Keith M; Gluckman, P.D.; Meaney, M.J.; Qiu, A. (ElSEVIER/NeuroImage, 2013-07)

Asymmetry of the neonatal brain is not yet understood at the level of structural connectivity. We utilized DTI deterministic tractography and structural network analysis based on graph theory to determine the pattern of ...
Efficient Switch Architectures for Pre-configured Backup Protection with Sharing in Elastic Optical Networks

Suthaharan, S; Ratnam, K; Ragel, R.G (IEEE 7th International Conference on Information and Automation for Sustainability (ICIAfS'14), 2014)

In this paper, we address the problem of providing survivability in elastic optical networks (EONs). EONs use fine granular frequency slots or flexible grids, when compared to the conventional fixed grid networks and ...
Abnormalities of cortical thickness, subcortical shapes, and white matter integrity in subcortical vascular cognitive impairment.

Thong, Jamie Yu Jin; Du, Jia; Nagulan, R.; Dong, Yanhong; Soon, Hock Wei; Saini, Monica; Tan, Ming Zhen; Ta, Anh Tuan; Chen, Christopher; Qiu, A (Wiley Online Library/Human Brain Mapping, 2014-05)

Subcortical vascular cognitive impairment (sVCI) is caused by lacunar infarcts or extensive and/or diffuse lesions in the white matter that may disrupt the white matter circuitry connecting cortical and subcortical regions ...
Pre-conﬁgured Backup Protection with Limited Resource Sharing in Elastic Optical Networks

Suthaharan, S; Ratnam, K; Ragel, R.G (IEEE 10th International Conference on Industrial and Information Systems (ICIIS'15), 2015)

In this paper, we address the problem of providing survivability in elastic optical networks (EONs). In EONs, unlike the traditional 50 GHz ﬁxed grid, ﬁne granular 12.5 GHz ﬂexgrid is used and the frequency spectrum is ...
Resource Efficiency for Dedicated Protection in WDM Optical Networks

Suthaharan, S; Samarakkody, D; Perera, W.A.S.C (Kelaniya International Conference on Advances in Computing and Technology, 2016)

The ever increasing demand for bandwidth is posing new challenges for transport network providers. A viable solution to meet this challenge is to use optical networks based on wavelength division multiplexing (WDM) technology. ...
Comparison of single-line rate for dedicated protection on WDM optical network topologies

Suthaharan, S; Samarakkody, D; Perera, W. A. S. C (IEEE International Conference on Information and Automation for Sustainability (ICIAfS), 2016)

Wavelength division multiplexing (WDM) divides the huge bandwidth available on a fiber into several non-overlapping wavelength channels and enables data transmission over these channels simultaneously. Failure of the optical ...
Real-time Lecture Delivery Approach to e-Learning Using WebRTC

Gopinath, S.; Senthooran, V.; Lojenaa, N.; Kartheeswaran, T. (WinC2016,Wayamba University of Sri Lanka., 2016)

Web Real Time Communication (WebRTC) is a new technology in communication. It is simply plug-in free video and audio transmission between web browsers. In existing e-learning technologies such as Moodle and Blackboard ...
Resource Assignment Schemes for Pre-configured Backup Protection in Elastic Optical Networks

Suthaharan, S (11th International Conference on Industrial and Information Systems (ICIIS), 2016)

In this paper, the problem of providing survivability in elastic optical networks (EONs) is addressed. EONs use 12.5 GHz fine granular frequency slots or flexible grids instead of using the traditional 50 GHz fixed grid ...
Usability and Accessibility Analysis of Government of Websites of Sri Lanka

Kartheeswaran, T.; Gopinath, S.; Lojenaa, N.; Senthooran, V. (IEEE TENSYMP 2016, Bali Indonesia, 2016)

The websites usability and accessibility standards make more convenient to the internet users. The most of exists websites are failed to follow these standards. Hence, in this research study, we analyze the usability and ...
A Combined Error Control with Forward Euler Method for Dynamical Systems

Vigneswaran, R.; Thilaganathan, S. (World Academy of Science, Engineering and Technology, 2016-05-12)

Variable time-stepping algorithms for solving dynamical systems performed poorly for long time computations which pass close to a fixed point. To overcome this difficulty, several authors considered phase space error ...

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Browsing Department of Physical Science by Publication Date

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