An improved positivity preserving odd degree-n Said-Ball boundary curves on rectangular grid using partial differential equation

This paper discusses the sufficient conditions for positivity preserving odd degree-n Said-Ball boundary curves defined on a rectangular grid.We derive a sufficient condition on boundary curves of rectangular Said-Ball patches where the lower bound ordinates are adjusted independently.To construct the boundary curves for each rectangular patch, the Said-Ball polynomial solution of fourth order PDE will be considered where its coefficients can be calculated using edge Said-Ball ordinates which fulfill the positivity preserving conditions.Graphical examples are presented using well-known test functions

Construction of cubic Ball surface based on biharmonic partial differentiation equation

This paper will discuss a new method of Ball surface generation from prescribed boundaries based on the partial differential operator. In particular, we focus on the construction of a bicubic Said-Ball surface using biharmonic partial differentiation equation. The main result is that the use of biharmonic Said-Ball surface would enable the overall surface to be generated and controlled based on the boundary curves rather than a set of control points. We illustrate the new method by using several graphical examples

On solving fuzzy delay differential equation using bezier curves

In this article, we plan to use Bezier curves method to solve linear fuzzy delay differential equations. A Bezier curves method is presented and modified to solve fuzzy delay problems taking the advantages of the fuzzy set theory properties. The approximate solution with different degrees is compared to the exact solution to confirm that the linear fuzzy delay differential equations process is accurate and efficient. Numerical example is explained and analyzed involved first order linear fuzzy delay differential equations to demonstrate these proper features of this proposed problem

A new approach for solving multi-pantograph type delay differential equations

In this paper, a modified procedure based on the residual power series method (RPSM) was implemented to achieve approximate solution with high degree of accuracy for a system of multi-pantograph type delay differential equations (DDEs). This modified procedure is considered as a hybrid technique used to improve the curacy of the standard RPSM by combining the RPSM, Laplace transform and Pade approximant to be a powerful technique that can be solve the problems directly without large computational work, also even enlarge domain and leads to very accurate solutions or gives the exact solutions which is consider the best advantage of this technique. Some numerical applications are illustrated and numerical results are provided to prove the validity and the ability of this technique for this type of important differential equation that appears in different applications in engineering and control system

Dual solutions of stagnation-point flow of a fluid on a shrinking surface of another quiescent fluid

A problem of an orthogonal stagnation point flow for an incompressible two-dimensional impingement of a lighter fluid on the surface of a heavier fluid is considered.The governing equations in partial differential equations are first transformed into ordinary differential equations using similarity transformation.The resulting equations are then solved numerically using shooting technique.It is found that dual solutions exist for certain parameters considered

Efficient approximate analytical methods for nonlinear fuzzy boundary value problem

This paper aims to solve the nonlinear two-point fuzzy boundary value problem (TPFBVP) using approximate analytical methods. Most fuzzy boundary value problems cannot be solved exactly or analytically. Even if the analytical solutions exist, they may be challenging to evaluate. Therefore, approximate analytical methods may be necessary to consider the solution. Hence, there is a need to formulate new, efficient, more accurate techniques. This is the focus of this study: two approximate analytical methods-homotopy perturbation method (HPM) and the variational iteration method (VIM) is proposed. Fuzzy set theory properties are presented to formulate these methods from crisp domain to fuzzy domain to find approximate solutions of nonlinear TPFBVP. The presented algorithms can express the solution as a convergent series form. A numerical comparison of the mean errors is made between the HPM and VIM. The results show that these methods are reliable and robust. However, the comparison reveals that VIM convergence is quicker and offers a swifter approach over HPM. Hence, VIM is considered a more efficient approach for nonlinear TPFBVPs

Mobility of IT professionals in Malaysia

This paper is based on a research study with the aim to investigate the mobility of IT professionals in Malaysia and come up with suggestions to improve recruitment and retention policies for the IT profession.A questionnaire,namely the IT Professional Turnover/Mobility Survey for the Management of IS/IT Department was constructed and administered to 415 respondents IT employees listed in the Malaysian National Computer Confederation (MNCC) registration list with a 25% response rate.Data gathered were statistically analysed descriptive statistics such as frequency counts and percentages,cross-tabulation,and correlation analysis.A research model was constructed based on review of related articles to determine factors that contribute tomobility of IT professionals.Among the major findings were a large majority of respondents would never or seldom moved and likely to stay for more than five years.Majority of respondents also indicated that they would remain as IT professionals with no plans to change their career.The findings also suggest that the three most attractive factors for moving among IT professionals are better salary,better working condition and better environment.The most common reasons for leaving was not happy with working conditions and no opportunity for self development.Good pay/renumeration was considered the best factor for staying in current organization,location (nearer to home) and career advancement opportunities were the two most popular factors chosen.On mobility factor,the variables found to be significantly related to mobility of IT professionals are: Age, Marital Status and Experience (Demographic Information);Tryout and Travel (Personality factor);Quitting Job and Satisfaction (Job Satisfaction);Salary (Career Advancement); and Work Condition and Flexi Time (Organizational Factor).On the employer's perspektive,the three most critical problems faced by employers when their IT personnel leave were disruption to scheduler,retraining, and difficulty to get replacement.In summary, the findings presented in this study suggest that IT professionals are likely to stay in their professions,felt that they have made the right choice in their career with the intention of staying with their current job,whilst charting their career goals within the IT profession, but less ambitious in taking up a more senior position within or outside the organization

Surface interpolation using partial differentiation equation with positivity preserving cubic Said-Ball curves boundary condition

This paper proposes the sufficient conditions for positivity preserving cubic boundary curves defined on rectangular grid using polynomial solution of fourth order linear PDEs in order to improve the positivity preserving of the interpolating surface. We derive a sufficient condition on boundary curves for each each of bicubic rectangular Bezier patches where the lower bounds of edge Bezier ordinates are adjusted independently.By using two well-known test functions, our result shows that the proposed method is well performed in terms of preserving the positivity of boundary curves and improves the positivity preserving of overall interpolating surfaces