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INDONESIA
SAINS DAN MATEMATIKA
Published by Universitas Diponegoro
ISSN : -     EISSN : -     DOI : -
Core Subject : Education,
Mathematics
Arjuna Subject : -
Articles 7 Documents
 1 
Search results for , issue "Volume 15 Issue 1 Year 2007" : 7 Documents clear
Model Dinamik Pertumbuhan Ekonomi Indonesia Pasca Krisis Moneter: Suatu Pendekatan Koreksi Kesalahan (Model Koreksi Kesalahan) I Marudani, Di Asih; Wilandari, Yuciana; Safitri, Diah
JURNAL SAINS DAN MATEMATIKA Volume 15 Issue 1 Year 2007
Publisher : JURNAL SAINS DAN MATEMATIKA

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Abstract

ABSTRACT---Salah satu perkembangan utama pada spesifikasi dinamis adalah Error Correction Model (ECM). ECM dapat dipakai untuk menjelaskan mengapa pelaku ekonomi menghadapi ketidakseimbangan (disequilibrium). Secara khusus, Teorema Representasi Gramger menyatakan bahwa ECM dapat dikatakan valid jika memuat himpunan variabel yang memenuhi uji kointegrasi. Pada hubungan keseimbangan antara xt dan yt adalah : yt = β0 + β1 xt maka dari penurunan rumus diperoleh Error Correction Model : ∆ yt= b1 ∆ xt – λ (yt-1 - β0 - β1 xt-1) + et 0 < λ < 1 Pada penelitian ini, akan diselidiki faktor-faktor yang mempengaruhi pertumbuhan ekonomi Indonesia pasca krisis moneter, yaitu periode 1997(III) – 2004(IV), sebagai studi kasus. Hasil empiris digunakan untuk menyelidiki efek jangka pendek dan jangka panjang dari variabel-variabel penjelas pada model pertumbuhan ekonomi. Dari hasil analisis diperoleh ECM : ∆ln(ĝdp)t = 0.004633 – 0.954748∆ln(kre)t + 0.397869∆ln(eks)t + 0.046700 ∆ln(fdi)t + 0.286713∆ln(kre)t-1– 0.183157∆ln(eks)t-1 – 0.360344∆ln(fdi) t-1 + 0.34592ECT Dan model jangka panjang yang dihasilkan adalah : ln (ĝdp)t= 0.013418 + 1.828841 ln(kre) + 0.470522 ln(eks) – 0.041697 ln (fdi) Kata kunci : Model Koreksi Kesalahan, kointegrasi, stasioneritas
Kemampuan Ligan Hipoxantin dan Quanin untuk Ekstraksi Kation Perak pada Fasa Air- Kloroform Suhartana, Suhartana
JURNAL SAINS DAN MATEMATIKA Volume 15 Issue 1 Year 2007
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ABSTRAK---Perak adalah merupakan jenis logam mulia, dapat dipakai untuk pelapis logam. Salah satu cara untuk dekonsentrasi kation cadmium dengan membuat senyawa kompleksnya, lalu diekstrak dalam pelarut organik. Dengan ligan Hipoksanthin perak dapat mengalami penurunan kadar sekitar 69,63 %, sementara dengan ligan quanin perak dapat mengalami penurunan kadar sekitar 69,92 %. Kata kunci: Perak, dekonsentrasi dan senyawa kompleks.
Kerapatan Jenis Lichenes Di Sekitar Kawah Sikidang Pegunungan Dieng (Density of Lichens Arround Sikidang Creater of Dieng Plateau) Widodo, Edy; Utami, Sri
JURNAL SAINS DAN MATEMATIKA Volume 15 Issue 1 Year 2007
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ABSTRACT---Lichens are symbiotic plant composed of two different types of organisms i.e. fungi and algae. Lichens sensitive to air pollutan of sulfur dioxide (SO2). Sikidang creater are still active to emist off SO2 and will be affected the availability of lichens as well as the their individual density along SO2 gradient. Sampling of lichens taken with sistematic method. Point sampling four were taken along transect line and sample plot 5 m x 5 m in size was applied..The occurance of species and density was record in every sampling plot. The environment factor measured were air SO2, pH, moisturized and air temperature. There were three species of lichens in Sikidang Creater, those are Cladonia beaumontii, Dactylina artica abd Parmelia cumberlandia. The highets density of species lichens is Cladonia beaumontii.   Keywords : density, Lichens. Sikidang Creater
Analisis Impedansi Elastik untuk Memprediksi Jenis Litologi Batuan dan Penyebaran Kandungan Fluida (Studi Kasus Lapangan MNWP– Pertamina DOH JBB) P., M. Nurdin W.; Yuliyanto, Gatot
JURNAL SAINS DAN MATEMATIKA Volume 15 Issue 1 Year 2007
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Abstract

ABSTRACT--- An identification of fluid contents on oil and gas exploration field has to be applied to determine a hydrocarbon and develop production area. This is caused a bright spot method that is based on associated with gas from seismic section, as a hydrocarbon indicator is failure, thus need an alternative method to determine the hydrocarbon from fluid contents. The identification of fluid contents are carry out on ‘MNWP’ field from inline 1380 – 1490, crossline 5040 – 5720, time 100 – 2000 millisecond with 9 well log data and use 2 software i.e. PG 2.0 Probe 3D and Vanguard. The identification involves elastic impedance analysis to find low impedance on Parigi Formation and to lithology prediction from the formation as a reservoir layer. The analysis result of elastic impedance describes that on Parigi Formation is covered by carbonate and discover fluid contents distribution be oriented from south to north that process sedimentation appropriate.Keywords: seismic section, fluid contents, impedance analysis
Perbandingan Kadar Garam Natrium dan Kalium pada Tes Ferning Lendir Mulut Mardiati, Siti Muflichatun
JURNAL SAINS DAN MATEMATIKA Volume 15 Issue 1 Year 2007
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ABSTRACT---The objective of this study was to know natrium and potassium levels of oral mucus ferning test. The object were 30 women, that were taken their oral mucus once within the 6th to 19th day of menstruation. The ferning test of oral mucus were examined with light microscope. The data distribution was analized by Kolmogorf – Smirnov, followed by non – parametric statistics. The mean, median and standard deviation were calculated with descriptive analysis. The Wilcoxon signed rank test was used to analyze the differentiation between the natrium and potassium levels of oral mucus in groups. The result of this study shows that the oral mucus potassium level is higher than natrium level. It means that potassium more important than natrium in the oral mucus ferning test.   Keywords : potassium, natrium, ferning score, oral mucus
Reduksi Persamaan Dirac ke Persamaan Cauchy Nondegenerate Hariyanto, Susilo
JURNAL SAINS DAN MATEMATIKA Volume 15 Issue 1 Year 2007
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ABSTRAK---Persamaan Dirac abstrak adalah suatu sistem persamaan diferensial parsial yang memiliki struktur abstrak sebagai berikut    ψ(t) = -i(cD + mc2 (τ-1) + V) ψ(t) dengan massa m>0, kecepatan cahaya c>0. Dalam artikel ini dikaji suatu cara mereduksi persamaan dirac abstrak yang dapat dipandang sebagai masalah Cauchy degenerate, ke masalah Cauchy abstrak nondegenerate. Reduksi ini dapat dilakukan dengan memformulasikan masalah yang dibicarakan dalam ruang Hilbert H dan tranformasi T: H H yang didefinisikan sebagai fungsi berkut: ψ(t) Є D(D) ....∆∆ H T   ->   T (ψ(t)) Ξ s(t) = ( P+ + cP-) ψ(t)   Kata kunci: Cauchy Degenerate, Nondegenerate, Persamaan Dirac, Ruang Hilbert
Identifikasi Unsur-Unsur Berdasarkan Spektrum Emisi Menggunakan Jaringan Syaraf Tiruan Prasetyo, Eko; Azam, Muchammad; Suseno, Jatmiko Endro
JURNAL SAINS DAN MATEMATIKA Volume 15 Issue 1 Year 2007
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 ABSTRACT---Neural network program for elements identification based on its emission spectrum has been made using backpropagation method. The programming language which was used is MATLAB 7.0. This neural network has a single hidden layer. Training and testing data are emission spectrum data which are emission wavelength from each element. Training process was done by introducing known emission spectrum data to neural network program. Neural network program has been successful to identify elements based on its emission spectrum. Training process will be faster if we adjust the number of hidden layer’s neuron as 100, the value of learning rate as 0,049 and the value of momentum as 0,98. The neural network accuracy of identifying elements is determined by the value of error target. Error target. The value of target error about 10-2 has accuracy 97,14% and the value of target error about 10-4 has accuracy 100%. Keywords: Neural network, backpropagation method, and emission spectrum

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