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INDONESIA
MATEMATIKA
Published by Universitas Diponegoro
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Core Subject : Education,
Mathematics
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Articles 8 Documents
 1 
Search results for , issue "Vol 11, No 3 (2008): JURNAL MATEMATIKA" : 8 Documents clear
PENENTUAN ESTIMASI PARAMETER REGRESI DENGAN VARIABEL DEPENDEN TERSENSOR L., Ignasia Diana; Dwi, Ispriyanti
MATEMATIKA Vol 11, No 3 (2008): JURNAL MATEMATIKA
Publisher : MATEMATIKA

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Abstract

Regression analysis is a statistical analysis that use relation between two or more variables. To use regression analysis, the value of each variable (dependent or independent) must be available. In fact, not all of  the information is available. Missing value on dependent variable cause Ordinary Least Square is no longer to be used. One method to handle this problem is censored regression. On this regression, missing value is replaced with a censored point. This censored point may occur naturally or  made by researcher, depend on the goal of research. Maximum Likelihood Method following Newton-Raphson Iteration Method, is used to get parameter estimation of censored regression. Test of model signification uses Likelihood Ratio-test and Wald-test.  
MODEL DINAMIK PERTUMBUHAN BIOMASSA UDANG WINDU DENGAN FAKTOR MORTALITAS BERGANTUNG WAKTU sulanjari, Sulanjari; sutimin, sutimin
MATEMATIKA Vol 11, No 3 (2008): JURNAL MATEMATIKA
Publisher : MATEMATIKA

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Abstract

In this paper will be discussed the growth model of shrimp biomass. Biomass is total weight from population. The growth model of shrimp biomass is influenced by the growth model of weight and of population. The growth model of weight, here will be governed and based on Von Bertalanffy’s model. The growth model of number population based on the exponential model and it has been constructed by mortality formula. From the growth model of shrimp biomass will be predicted when accurate harvest time to know the optimal harvest product.  
STRATEGI MODEL PENGENDALIAN PENYEBARAN VIRUS INFLUENZA Pratiwi, Noviana; kartono, Kartono
MATEMATIKA Vol 11, No 3 (2008): JURNAL MATEMATIKA
Publisher : MATEMATIKA

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Abstract

Influenza or more popular is called flu is a kind of disease caused by virus which infect system of respiratory. Virus of influenza spread by direct contact with a host, so it is needed a quarantine and isolate program to rein it. By quarantine and isolate, formulation of reproduction number are made, by then is to determine a strategy to rein the virus. As a verification of formula obtained, we study the avian influenza at Central Java on September 2005 – April 2008.  
GEOMETRI PROYEKTIF PG(2, pn) UNTUK MEMBENTUK RANCANGAN BLOK TIDAK LENGKAP SEIMBANG SIMETRIS H, Yuni; Bambang, Irawanto
MATEMATIKA Vol 11, No 3 (2008): JURNAL MATEMATIKA
Publisher : MATEMATIKA

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Abstract

A Symmetric Balanced Incomplete Block design with parameters  is Balanced Incomplete Block (BIB) design with  and . Projective geometry PG (2, pn) is the finite geometry of two dimensions over the Galois Field GF(pn). Projective geometry PG (2, pn) can be used to construct symmetric BIB design if the points of PG(2, pn) are assumed same with the object of symmetric BIB design and the lines which contain the points from PG(2, pn) same with the blocks of symmetric BIB design.  
MODEL DIFRAKSI SINYAL PADA BIDANG MIRING TAJAM suhartono, Suahrtono; Kushartantya, Kushartantya; sugiharto, Aris
MATEMATIKA Vol 11, No 3 (2008): JURNAL MATEMATIKA
Publisher : MATEMATIKA

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Abstract

Signal is a wave that can be expressed by physical phenomenon. Mathematically signal wave can be represented as a function of single or many independent variables, for example signal wave over hill or mountain as a function of distance or time. In fact, signal spreading as a wave have many attenuation, for example is caused by difraction  when the signal over hill or building. The purpose of this writing scientific jurnal is to make a model of knife edge difraction, that seen by two cases, such as transmitter has same height to receiver and transmitter has different height to receiver. Computation result show that transmitter has same height to receiver then the increasing of value of v cause reduction of difraction variable. And  in case of the height transmitter and receiver is not the same, the degradation of v variable has an effect to the increasing of difraction variable.  
NILAI SOLUSI PENDEKATAN SISTEM LINEAR SKALA BESAR MENGGUNAKAN GMRES dkk, Farikhin
MATEMATIKA Vol 11, No 3 (2008): JURNAL MATEMATIKA
Publisher : MATEMATIKA

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Abstract

Many engineering process require the solution of linear system of the form , where A is a  nonsingular real matrix,  , and vector  is solution of the linear system. There are two methods for solving large scale linear system which are full orthogonalization method (FOM) and Generalized minimal residual (GMRES). GMRES is most popular method to solve large scale linear equations. In this paper, we proven that GMRES preserved the magnitude of approximations solution of linear system.
METODE PENYELESAIAN MASALAH CAUCHY DEGENERATE NONHOMOGEN MELALUI PENYELESAIAN MASALAH CAUCHY NONDEGENERATE NONHOMOGEN hariyanto, Susilo
MATEMATIKA Vol 11, No 3 (2008): JURNAL MATEMATIKA
Publisher : MATEMATIKA

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Abstract

In this article, we investigate how to solve abstract degenerate Cauchy problems nonhomogen via abstract nondegenerate Cauchy problems nonhomogen. The problem are discussed in the Hilbert space H  which can be written as an orthogonal direct sum of Ker M and . Under certain assumptions it is possible to reduce the problems to an equivalent  nondegenerate Cauchy problem in the factor space   H/Ker M  which can be easier to solve. Moreover we defines an operator ZA which maps the solutions of abstract nondegenerate Cauchy problems nonhomogen to abstract degenerate Cauchy problems nonhomogen  
SIFAT-SIFAT GRAF (2n) L., Erly; Hariyanto, Susilo
MATEMATIKA Vol 11, No 3 (2008): JURNAL MATEMATIKA
Publisher : MATEMATIKA

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Abstract

A sequence of non negative integers d = (d1, d2, …, dn) is said a sequence of graphic if it is the degree sequence of a simple graph G. In this case, graph G is called realization for d. The set of all realizations of  non isomorfic 2-regular graph with order n (n ≥ 3) is denoted R(2n), whereas a graph with R(2n) as set of  their vertices is denoted (2n) . Two vertices in graph (2n)  are called adjacent if one of these vertices can be derived from the other by switching. In the present paper, we  prove that  for n ≥ 6, (2n) is a connected and bipartite graph.  

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