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MATEMATIKA
Published by Universitas Diponegoro
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Articles 300 Documents
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WAKTU OPTIMUM PRODUKSI DAN KONSUMSI OKSIGEN RUMPUT LAUT GRACILARIA VERRUCOSA Kartono, Kartono; Izzati, Munifatul Izzati
MATEMATIKA Vol 13, No 2 (2010): JURNAL MATEMATIKA
Publisher : MATEMATIKA

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Abstract

Seaweed Gracilaria verrucosa not only produce oxygen but also consume oxygen. Consider   the production and consumption of the oxygen, we can determined that the production and consumption models of oxygen like a logistic models. Finally, in this paper  presented a role to determine an optimum time of the oxygen production and consumption.
PELABELAN PRIME CORDIAL PADA BEBERAPA GRAF YANG TERKAIT DENGAN GRAF SIKEL Hapsari, Nindita Yuda; Utomo, Robertus Heri Soelistyo; Ratnasari, Lucia
MATEMATIKA Vol 18, No 1 (2015): Jurnal Matematika
Publisher : MATEMATIKA

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Abstract

Prime cordial labeling of a graph  is a bijective mapping of the set vertex  to the set  where  is the number of vertex . The edge labeling induced the vertex labeling, which is obtained by finding the great common divisor (gcd) of the label of vertex which it’s adjacent. If gcd of the adjacent vertex label is 1 then the label of edge is 1, but if gcd of the adjacent vertex label value other than 1 then the label of edge is 0, and the absolute value of the difference between the number of edges labeled 0 and the number of edges labeled 1 is less than equal with 1. A graph admits prime cordial labeling is called prime cordial graph. In this paper, we study about edge duplication cycle graph  (except for ), vertex duplication cycle graph , path union union of cycle the graph  and friendship graph one point union of    copies of cycle .
ANALISIS PENYALURAN RASKIN DI KOTA SEMARANG eko, Rosiana; tatik, widiharih
MATEMATIKA Vol 12, No 1 (2009): JURNAL MATEMATIKA
Publisher : MATEMATIKA

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Abstract

Raskin Program is national program with aim to support impecunious household in fulfilling sufficiency of requirement of food and lessen burden of finansial through readying of rice subsidize. BPS have specified 14 ( fourteen) impecunious family criterion which become base of division of raskin. Household told impecunious if fulfilling one of the impecunious criterion. To analyze distributing of raskin conserning to the number of variable which is used in determining household receiver of raskin by logistics regression. Household owning highest probability accept raskin is household with floor is earth, residence wall type is bamboo, usage of facility defecate public, source of improtected wellspring drinking water, fuel to cook firewood, not capable to pay [for] the expense of medication, revenue of earnings of family head less than Rp 600.000,00 highest education of family head is Madrasah Ibtidaiyah, owning things which can be sold for the price of less than Rp 500.000,00  
INTERPOLATION THEOREM FOR NONCOMMUTATIVE STANDARD EXTENSIONS OF LOGIC BB’I Surarso, Bayu
MATEMATIKA Vol 7, No 2 (2004): JURNAL MATEMATIKA
Publisher : MATEMATIKA

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Abstract

Maehara in [Maehara, 1960/1961] introduces a proof-theoretical method for proving the interpolation theorem for standard logics. In the present paper we modify Maehara’s method to prove the interpolation theorem for the systems LBB’IK, LBB’IW and LBB’IKW introduced in [Bayu Suraraso, 2005] and consequently the interpolation theorem holds for the logics BB’IK, BB’IW and BB’IKW.  
MODEL OPTIMASI ECONOMIC ORDER QUANTITY DENGAN SISTEM PARSIAL BACKORDER DAN INCREMENTAL DISCOUNT Nurhayati, Neri; Puspita, Nikken Prima; SRRM, Titi Udjiani
MATEMATIKA Vol 20, No 1 (2017): JURNAL MATEMATIKA
Publisher : MATEMATIKA

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Abstract

Economic Order Quantity model with partial backorder system and incremental discount is an integration of several model of inventory optimation, they were Economic Order Quantity optimation model, Economic Order Quantity optimation model with partial backorder system and Economic Order Quantity optimation model with incremental discount. Beside the discounts are given by supplier, in this model there were two stockout conditions, where the consumers disposed to wait until the order came and consumers did not disposed to wait until the order came. 
SILINDER BERPENAMPANG AIRFOIL DARI PENJUMLAHAN DUA LINGKARAN sihwaningrum, Idha
MATEMATIKA Vol 5, No 1 (2002): Jurnal Matematika
Publisher : MATEMATIKA

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Abstract

In two dimensional nonviscous incompressible irrotational fluid flow, the equipotential lines and the streamlines can be related to the real and imaginary part of the complex function respectively.  By taking the streamlines equal to zero as the boundary fluid flows, we get several types of fluid flows such as fluid flow past a circular cylinder.  Having addition of two cylinder in a certain position result in an airfoil, it it reseanoble for asking whether addition of two equation of fluid flow past a cylinder give an equation of fluid flow past an airfoil cylinder.  This can be answer by examining  a lift from the airfoil equation. It is difficult to obtain the actual value of the lift.  To gain an understanding, we examine the change of square of the velocity in the neighbourhood of the airfoil.  Bernoulli's equation provides the connection between the pressure and the square of the velocity . Then the knowledge of the square of the fluid flow velocity gives an indication of the pressure.  Since the square of the fluid flow velocity in the neighbourhood below the airfoil is smaller than it is in the neighbourhood above the airfoil, then the pressure in the neighbourhood below the airfoil is greater than it is the neighbourhood above the airfoil.  This indicates that we have a lift from the equation of fluid flow past an airfoil in which its equation formed by summing two equation of fluid flow past a cylinder.  
PENERAPAN DISTRIBUSI PELUANG UNTUK IDENTIFIKASI PERUBAHAN KLIMATOLOGIS CURAH HUJAN EKSTRIM Visa, Juniarti
MATEMATIKA Vol 8, No 3 (2005): JURNAL MATEMATIKA
Publisher : MATEMATIKA

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Abstract

Climatological change analysis of rain fall in Maros and Ciamis had been done using rain fall data for 103 years. The rain fall process was focused in wet months (DJF) and dry months (JJA). The results show that in Maros and Ciamis area there had been a rain fall climatological change in every 30 years an average period. Using Statistical Distribution method, an extreme rain fall occurred in each period. The maximum rain fall in Maros was 1937 mm/month for wet months (DJF) and 316 mm/month, while in Ciamis was 1039 mm/month for wet month and 1199mm/month for dry month.
SYARAT CUKUP AGAR SUATU FUNGSI TERINTEGRAL HENSTOCK MUTLAK DI DALAM RUANG METRIK KOMPAK LOKAL manuharawati, Manuharawati; Darmawijaya, Soeparna
MATEMATIKA Vol 6, No 2 (2003): Jurnal Matematika
Publisher : MATEMATIKA

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Abstract

Lee (1989) dan Widodo (1992) telah memperlihatkan bahwa integral Henstock di dalam ruang metrik biasa R bukan merupakan integral mutlak. Berdasarkan kenyataan tersebut, makalah ini membahas  syarat cukup agar suatu fungsi terintegral Henstock mutlak di dalam ruang metrik kompak lokal, khususnya ruang metrik nondiskrit.
REPRESENTATION OF SM OPERATORS ON SEQUENCE SPACES WITH A NEW NORM Ansori, Muslim
MATEMATIKA Vol 14, No 3 (2011): Jurnal Matematika
Publisher : MATEMATIKA

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Abstract

We give some representations of SM-operator on sequence spaces , using a new norm different from that of ones in the beginning and some examples are given
KAJIAN MATEMATIS DISTRIBUSI TEKANAN PADA AIRFOIL JOUKOWSKY MARYANTO, EDDY
MATEMATIKA Vol 10, No 1 (2007): JURNAL MATEMATIKA
Publisher : MATEMATIKA

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Abstract

The objectives of this research are to investigate the effect of the translation of the coordinate system to the shape of the Joukowsky airfoils formed and to compute lift coefficient of the Joukowsky airfoils. The result of the research is the higher the absisca and ordinate of the translation the higher the lift coefficient (with absisca must be greater than ordinate and  both are greater to zero).  If the circle is translated along positive x-axis, the airfoil formed is symmetrical with respect to x-axis.  While if it is  translated along positive y-axis, the airfoil formed is curve shaped.   From the research we also have found the fact the higher the distance of the translation from the center of the coordinate system the higher the thickness of the airfoil formed.  

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