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Published by Universitas Syiah Kuala
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Core Subject : Education,
Mathematics
2nd conference of ICMSA was held in 2006 at Penang, Malaysia.
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Articles 49 Documents
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ANALYSIS OF MEAT DEMAND IN MALAYSIA: MODEL CHOICE BETWEEN ROTTERDAM AND AIDS Maria Divina S. Paraguas et al.
Proceedings of ICMSA Vol 1, No 1 (2005): ICMSA 2005
Publisher : Proceedings of ICMSA

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Abstract

Aggregated time series data for differentiated meat products namely,beef, pork, poultry and mutton were used to estimate and analyzeMalaysian market demand for meats. The study aimed to select themost appropriate demand model between the equally popularRotterdam model and tlre first difference Linear Approximate AlmostIdeal Demand System (LAIAIDS) model by using a non-nested test-Both models were accepted, but further diagnostic tests revealed thatthe first difference LA/AIDS represents more appropriately theMalaysian market demand for meat than the Rotterdam model. Also,the elasticities from the first difference LAIAIDS were found to bemore reliable than the Rotterdam model.Keywords: Non-nested tost, Rotterdam, AIDS, meat demand,Malaysia
A THREE-DIMENSIONAL NUMERICAL MODEL FOR BAROCLINIC DYNAMIC IN THE MALACCA STRAIT Taufiq Iskandar et al.
Proceedings of ICMSA Vol 1, No 1 (2005): ICMSA 2005
Publisher : Proceedings of ICMSA

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Abstract

The circulation in the Malacca Strait is simulated using a three-dimensionalbaroclinic numerical model. The circulation model isderived from the combined effects of tides, wind, meteorologicalforcings, temperature and salinity. The computational results producedpattern of general circulation and also sea surface temperature andsalinity. In the present study, the pattem of current circulation in theMalacca Strait coincided with the work [7].Keywords: Three-dimensional numerical model; Baroclinic circulation;Sea surface temperature and salinity; Malacca Strait
NEWTON POLYHEDRA AND ESTIMATION TO EXPONENTIAL SUMS Atan, Kamel Arifin Mohd
Journal of ICMSA Vol 1, No 1 (2006): Pure Maths : ICMSA 2006
Publisher : Journal of ICMSA

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Abstract

The classical Newton polygon is a device for computing the fractional power series expansions of algebraic functions. Newton gave a number of examples of this process in his ”Method of Fluxions” which amount to a general method. However, it was not till much later that Puiseux proved that every branch of a plane algebraic curve defined by a polynomial equation f(x, y) = 0 has an expansionin a neighbourhood of a point (x0, y0) on the curve. In practice, the integers a, b and q can be read off from the Newton polygon and the coefficients cj can be determined successively with ever-increasing labour.
WHY DID IRANIAN GIRLS PERFORM BETTER THAN BOYS IN MATHEMATICS? Ali Reza Kiamanesh
Proceedings of ICMSA Vol 1, No 1 (2005): ICMSA 2005
Publisher : Proceedings of ICMSA

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Abstract

Research literature on gender differences in math shows that male advantage inmathematics achievement is a universal phenomenon. One of the mostremarkable results of two international studies, i.e., TIMSS 1999 and TIMSS2003 (Trends in Internatioaal Mathematics and Science Study), for hanianfourth and eighth graders is that boys' math achievement score had a significantdecrease and that of girls a significant improvement. The focus of the presentstudy was on changes in Iranian boys' and girls' math achievement in TIMSS 99and 2003 in grade eight and it sought to identi$ different predictor variableswhich might have resulted in girls' higher nmttematics achievement.Keywords: Matlematics Achievement; Gender Differences; Math Self-Concept;Attitudes towards lvlath
THE QUADRATIC ASSIGNMENT PROBLEM : SOME NEW RESULT AND GENERALIZATION Faiz Ahyaningish et al.
Proceedings of ICMSA Vol 1, No 1 (2005): ICMSA 2005
Publisher : Proceedings of ICMSA

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Abstract

The Quadratic assignment problem is a combinatorial problem ofdeciding the placement of facilities in specified locations in such a wayas to minimize an function expressed in terms of distances betweenlocations and flows between facilities. The approach presented in thispaper is to treat is as a large quadratic programming problem withinteger resfictions on the variables. The integer requirements areinitially relaxed, and the nearest feasible solutions in then sought.schemes for accomplishing this are described, and their applicability tomore general problems is discussed.
MAXIMAL TEMPORAL AMPLITUDE (MTA) OF TRI-CHROMATIC SIGNALS Marwan .
Proceedings of ICMSA Vol 1, No 1 (2005): ICMSA 2005
Publisher : Proceedings of ICMSA

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Abstract

Previous numerical and experimental results about surface waves whichare originally bi-chromatic signal on the wave maker, showphenomenon about peaking and splitting dwing their propagation in thewave tank. To investigate this phenomenon, especially in peaking, aquantity called Maximal Temporal Amplitude (MTA) is introduced.This quantity can be used to predict the position of the occurrence ofmaximal peaking. ln this paper, we present the MTA form of tricluomaticsignal, especially to predict the position of maximal peakingof the signal. Here, the tri-chromatic signal is a superposition of threemono-chromatic signals with different of amplitudes, frequencies andinitial phases. We use KdV equation with exact dispersion relation(linear) as a model. We get some approximated solution by expandingthe equation in the power series of amplitude and wave number of trichromaticsignal up to third order.Keywords : Phase tri-chromatic signal, Maximal Temporal Amplitude
BARGAINING GAME AND EQUITY SHARING SYSTEM IN EMPLOYMENT PROBLEM Anton Abdulbasah Kamil
Proceedings of ICMSA Vol 1, No 1 (2005): ICMSA 2005
Publisher : Proceedings of ICMSA

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Abstract

Profit sharing has been proposed as a solution to underemploymentresulting from collective bargaining, but the empirical results areambiguous and the theoretical basis for this claim is weak. This papershows equity sharing can, in theory, solve the principle shortcomings ofprofit sharing. First, equity sharing can resolve both underemployment andover employment. Second, the results do not depend on assuming thatinsiders and the firm are prevented from bargaining over employmentlevel. Third the system does not require government intervention sinceboth sides can benefit from adopting equity sharing.Keywords: Bargaining game, profit sharing model, equity sharing.
SYMMETRY ANALYSIS ON Jessada Tanthanuch
Proceedings of ICMSA Vol 2, No 1 (2006): Pure Maths : ICMSA 2006
Publisher : Proceedings of ICMSA

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Abstract

Equationis a delay partial differential equation with an arbitrary functional G. Group analysis method is applied to find symmetries of the equation and to make group classification. Representations of analytical solutions and reduced equations are obtained from the symmetries.
ON THE THEORY OF DIOPHANTINE APPROXIMATIONS AND CONTINUED FRACTIONS EXPANSION Hailiza Kamarul Haili
Proceedings of ICMSA Vol 1, No 1 (2005): ICMSA 2005
Publisher : Proceedings of ICMSA

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Abstract

Approximation of irrational numbers by the rationals has been studiedfor decades and one of the methods to approximate the irrationals is byusrng the diophantine approximation and the convergents of itscontinued fractions expansion Many results pertaining to this area ofresearch has been developed and documented. In 1963, Niven [Niv] inhis monograph had shown a sketch proof of several results related tothis problem. Now, in this paper we attempt to write a morecomprehensive and well sfuctured proofs. Given a real number 0,how closely can it be approximated by rational numbers?.Keywords: Diophantine approximatioq continued fractions, irrationalnumber, and rational number.  
DETERMINING INITIAL ASSIGNMENT FOR SOLVING QUADRATIC ASSIGNMENT PROBLEMS Elly Rosmaini
Proceedings of ICMSA Vol 1, No 1 (2005): ICMSA 2005
Publisher : Proceedings of ICMSA

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Abstract

The Quadratic Assignment Problem is a combinatorial problem ofdeciding the placement of facilities in specified locatians in such a waythat will to minimize an objective function expressed in terms ofdistance each location and flows each facilities. First they a simpleheuristic approach is used to obtain an initial assignment point..Hetristic Tabu search method is the implemented in other to getanother assignment point, which in tum will be used as a starting pointfor Nonlinier Programing approach. The continuous result of nonlinierprograming problem are the prosesed using another heuristic method toobtain an integer feasible solution to the quadratic assignment problem.The non convex behavior of the problem suggests that a good startingis necessary in order to obtain global solution. The procedure is thenimplemented on Backboard Wiring problem with dimension 20 x 20.Keywords; Quadratic Assignment problems; Tabu Search.

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