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Particular Method (particular + method)

Distribution by Scientific Domains

Medical Sciences	33%

Selected Abstracts

Data partitioning-based parallel irregular reductions

CONCURRENCY AND COMPUTATION: PRACTICE & EXPERIENCE, Issue 2-3 2004
Eladio Gutiérrez
Abstract Different parallelization methods for irregular reductions on shared memory multiprocessors have been proposed in the literature in recent years. We have classified all these methods and analyzed them in terms of a set of properties: data locality, memory overhead, exploited parallelism, and workload balancing. In this paper we propose several techniques to increase the amount of exploited parallelism and to introduce load balancing into an important class of these methods. Regarding parallelism, the proposed solution is based on the partial expansion of the reduction array. Load balancing is discussed in terms of two techniques. The first technique is a generic one, as it deals with any kind of load imbalance present in the problem domain. The second technique handles a special case of load imbalance which occurs whenever a large number of write operations are concentrated on small regions of the reduction arrays. Efficient implementations of the proposed optimizing solutions for a particular method are presented, experimentally tested on static and dynamic kernel codes, and compared with other parallel reduction methods. Copyright © 2004 John Wiley & Sons, Ltd. [source]

The Role of Effective Modeling in the Development of Self-Efficacy: The Case of the Transparent Engine,

DECISION SCIENCES JOURNAL OF INNOVATIVE EDUCATION, Issue 1 2007
Kevin P. Scheibe
ABSTRACT Computing technology augments learning in education in a number of ways. One particular method uses interactive programs to demonstrate complex concepts. The purpose of this article is to examine one type of interactive learning technology, the transparent engine. The transparent engine allows instructors and students to view and directly interact with educational concepts such as Web-enabled software development. The article first presents a framework describing transparent engines. The framework details four types of transparent engines: (1) enactive mastery/manipulatable, (2) enactive mastery/nonmanipulatable, (3) vicarious experience/manipulatable, and (4) vicarious experience/nonmanipulatable. Following this, we present the results of an experiment designed to examine this framework by testing its predictions for one quadrant, vicarious experience/nonmanipulatable. The results support the framework in that students taught concepts with the aid of the vicarious experience/nonmanipulatable transparent engine had significantly higher domain-specific self-efficacy compared to those taught the same concepts without this tool. [source]

Radial forearm-palmaris longus tenocutaneous free flap; implication in the repair of the moderate-sized postoncologic soft palate defect

HEAD & NECK: JOURNAL FOR THE SCIENCES & SPECIALTIES OF THE HEAD AND NECK, Issue 9 2009
Tai Suk Roh MD
Abstract Background. Moderate resection of the soft palate results in suboptimal outcomes in terms of postoperative velopharyngeal function. We propose the radial forearm tenocutaneous free flap incorporating the palmaris longus tendon for reconstruction of the levator sling in these cases. Methods. Twenty-six patients underwent reconstruction with this method. Group I defect involved up to one-fourth of the soft palate. Group II defect involved up to one-half of the soft palate whether or not including the uvula. Group III defect involved more than three-fourths of the soft palate. Postoperative function was assessed by means of speech intelligibility, swallowing performance, nasalance score, and nasoendoscopy. Results. Groups I and II showed normal results for speech intelligibility and swallowing function at 44 months. In group III, both parameters proved to be suboptimal. Conclusions. Moderate-sized soft palatal resection cases (group II) benefited most from this particular method of dynamic reconstruction using the radial forearm tenocutaneous free flap. © 2009 Wiley Periodicals, Inc. Head Neck, 2009 [source]

On Different Approaches to Estimate the Mass Fractal Dimension of Coal Aggregates

PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION, Issue 5 2005
Jimmy Y. H. Liao
Abstract Several methods to measure the structures of coal aggregates are compared. Loose and compact coal aggregates were generated through flocculation of ultrafine coal particles (mean volume diameter of 12,,m) under specific shearing conditions. Aggregate structure in terms of mass fractal dimension, Df, was determined using various methods; namely 2D and 3D image analysis, interpretation of intensity patterns from small angle light scattering, changes in aggregation state through light obscuration, and settling behavior. In this study, the measured values of Df ranged from 1.84,2.19 for coal aggregates with more open structures, and around 2.27,2.66 for the compact ones. All of these approaches could distinguish structural differences between aggregates, albeit with variation in Df values estimated by the different techniques. The discrepancy in the absolute values for fractal dimension is due to the different physical properties measured by each approach, depending on the assumptions used to infer Df from measurable parameters. In addition, image analysis and settling techniques are based on the examination of individual aggregates, such that a large number of data points are required to yield statistically representative estimations. Light scattering and obscuration measure the aggregates collectively to give average Df values of the particulate systems; consequently ignoring any structural variation between the aggregates, and leaving possible small contaminations undetected (e.g. by dust particles or air bubbles). Appropriate utilization of a particular method is thus largely determined by system properties and required data quality. [source]

A numerical method for computing the response of composites with periodic microstructure

PROCEEDINGS IN APPLIED MATHEMATICS & MECHANICS, Issue 1 2003
Sven Kassbohm Dipl.-Ing.
The stress-strain response of a periodic structure due to an applied eigenstrain field is investigated. The periodic structure allows reduction of the problem to a representative volume element (RVE) problem. A review of Fourier series as a particular method of solving the set of differential equations is given, and an example problem is studied. Results of the latter method are compared to results obtained using discrete Fourier transforms in a different way. [source]

Rhinophyma: Carbon dioxide laser with computerized scanner is still an outstanding treatment

AUSTRALASIAN JOURNAL OF DERMATOLOGY, Issue 4 2009
Shueh-Wei Lim
ABSTRACT The cosmetic deformity produced by rhinophyma is characterized by nodular hypertrophy of the nasal skin. A retrospective review and analysis of nine consecutive patients with moderate and major rhinophyma treated with scanned carbon dioxide laser was performed. A particular method of continuous scanner use is described. This report demonstrates excellent cosmetic results and no major postoperative complications or recurrence of the condition after 1 year of follow up for seven patients. Two more patients had been followed up for 1 month at the time this paper was written. Scanned carbon dioxide laser is safe and highly effective treatment for rhinophyma. [source]