Farikhin Farikhin
Lab Matematika Terapan, Jurusan Matematika FSM Undip

Published : 18 Documents
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ANALISIS KINERJA UNIT USAHA MENGGUNAKAN MODEL CCR (STUDI KASUS PADA APOTEK KIMIA FARMA SEMARANG) Rahmania, Laily; Farikhin, Farikhin; Surarso, Bayu
MATEMATIKA Vol 17, No 3 (2014): Jurnal Matematika
Publisher : MATEMATIKA

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Abstract

Data envelopment analysis (DEA) is a non-parametric technique for performace evaluation. In DEA context, we know two model which are CCR model and BCC model. With these model we break all of decision making units (DMU) into two classess, efficiency DMU and inefficiency DMU. In this note, we discuss CCR model and its application to evaluate DMU?s on Kimia Farma Semarang. Further, we find that dual problem is better than primal problem to evaluate effiency DMU.
MODEL REDUKSI PADA PARAMETER MARKOV Farikhin, Farikhin
MATEMATIKA Vol 14, No 3 (2011): Jurnal Matematika
Publisher : MATEMATIKA

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Abstract

As well known that the model reduction for large-scale linear dynamical systems based on Krylov subspace is called moments matching. In this method, one or more interpolation points is needed to construct  a certain Krylov subspace. In this paper, we propose the proof of theorem for moment matching at Markov parameter using the theorem which is obtained from standard block Arnoldi algorithm.
PELABELAN TOTAL TRIMAGIC SISI TERURUT TITIK-A PADA BEBERAPA GRAF Aprilia, Maita; Soelistyo Utomo, Robertus Heri; Farikhin, Farikhin
MATEMATIKA Vol 20, No 2 (2017): JURNAL MATEMATIKA
Publisher : MATEMATIKA

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Abstract

Given graph G with number of vertex p and number of edge q. In this paper, we discussed a-vertex consecutive edge trimagic total labeling for several graphs which contain Bistar and Cycle Graph.
BANACH LATTICE YANG MEMUAT CO Farikhin, Farikhin
MATEMATIKA Vol 10, No 2 (2007): JURNAL MATEMATIKA
Publisher : MATEMATIKA

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Abstract

Let Banach lattices E and F. Lattice homomorphism T : E ® F is called lattice embedding if there exists positive numbers m and n such that  for all xÎE implies m.|||| £ ||T()|| £ n.||||. In others word, Banach lattice E is said to be lattice embeddable in F if there exist closed subspace F0 Í F such that F0 and E are lattice isomorphic. As well known that dual space of E is Levi-s, i.e.     sup{ / n = 1, 2,...} in E* exist for every increasing bounded (in the norm) sequences { / n = 1, 2,...} in E*. If sequences space c0 is lattice embeddable in E* then sequences space l¥ is lattice embeddable in E*, within E* is dual space of E. This theorem is proven by Groenewegen in [4]. For Levi-s Banach lattice E, we proof that sequences space c0 is lattice embeddable in E if only if sequences space l¥ is lattice embeddable in E.  
PERBANDINGAN ANALISA IMAGE WAJAH DIGITAL MENGGUNAKAN METODE COSINUS PAKET (CPT) DAN METODE WAVELET (DWT) suparti, Suparti; Farikhin, Farikhin
MATEMATIKA Vol 6, No 3 (2003): Jurnal Matematika
Publisher : MATEMATIKA

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Dalam perkembangan IPTEK seringkali dilakukan pengiriman image melalui suatu media misalnya satelit. Dalam proses pengiriman image ini seringkali mengalami noise (gangguan) yang mengakibatkan image yang diterima menjadi tidak jelas (kabur). Untuk mendapatkan image yang mirip dengan aslinya maka ganguan ini harus dihilangkan (denoising). Dalam analisa image, dapat ditentukan image terbaik dengan menghilangkan gangguan. Analisa image ini dapat dilakukan dengan metode cosinus Fourier (DCT) yang kemudian dikembangkan dalam metode cosinus paket (CPT) maupun dengan metode wavelet (DWT) yang kemudian dikembangkan menjadi metode wavelet paket (WPT). Kebaikan dalam analisa dapat dilihat dari besar kecilnya penyimpangan yang terjadi. Semakin kecil penyimpangannya semakin baik analisa imagenya. Salah satu ukuran untuk menentukan besar penyimpangan adalah dengan menentukan besar MSE (Mean Squared Error). Dalam penelitian ini dilakukan perbandingan analisa image wajah digital menggunakan metode cosinus paket (CPT) dan metode wavelet (DWT) dengan tujuan menentukan image wajah terbaik menggunakan metode CPT dan DWT serta menentukan metode yang lebih efektif. Penelitian ini merupakan kajian literatur yang dikembangkan dengan simulasi menggunakan software S+Wavelets. Dalam analisa image wajah digital metode DWT lebih efektif dari metode CPT.  
PENGAYAAN YODIUM DAN KADAR NACL PADA GARAM KROSOK MENJADI GARAM KONSUMSI STANDAR SNI ENRICHMENT OF IODIUM AND SODIUM CLORIDE IN THE TRADITIONAL SALT BECOME CONSUMTION SALT INS STANDARD Nur, M.; Marhaendrajaya, I.; Sugito, Sugito; Windarti, T.; Arnelli, Arnelli; Hastuti, R.; Haris, A.; Rahmanto, W. H.; Widodo, Didik Setiyo; Ariyanto, F.; Muhlisin, Z.; Suseno, J. E.; Setiawati, E.; Sutanto, H.; Priyono, Priyono; Izzati, M.; Hariyati, R.; Tana, S.; Raharjo, B.; Ispriyanti, D.; Farikhin, Farikhin; Rusgiyono, A.; Suhartono, Suhartono
JURNAL SAINS DAN MATEMATIKA Volume 21 Issue 1 Year 2013
Publisher : JURNAL SAINS DAN MATEMATIKA

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Abstract

This research has been carried out in the quality improvement of traditional salt (krosok salt) into salt consumption for the Indonesian National Standard. This report is devoted to the elevated levels of NaCl and KIO3. Increased levels of NaCl and Iodine (represented by KIO3) is done by washing the salt with the traditional clothes washer with two rounds and by using water with saline solution at 22-24 Be (known as the old water). Traditional salt taken from three districts, such as Pati District, Jepara District, and Rembang District. We found that the concentration of NaCl in the treatment salt maximum is  96 % and Iodium or present of KIO3 is 40 ppm.   Key words: Salt,  traditional, INS, Consumtion, NaCl, KIO3
OPTIMISATION TOWARDS LATENT DIRICHLET ALLOCATION: ITS TOPIC NUMBER AND COLLAPSED GIBBS SAMPLING INFERENCE PROCESS Subeno, Bambang; Kusumaningrum, Retno; Farikhin, Farikhin
International Journal of Electrical and Computer Engineering (IJECE) Vol 8, No 5: October 2018 (Part I)
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (325.186 KB) | DOI: 10.11591/ijece.v8i5.pp3204-3213

Abstract

Latent Dirichlet Allocation (LDA) is a probability model for grouping hidden topics in documents by the number of predefined topics. If conducted incorrectly, determining the amount of K topics will result in limited word correlation with topics. Too large or too small number of K topics causes inaccuracies in grouping topics in the formation of training models. This study aims to determine the optimal number of corpus topics in the LDA method using the maximum likelihood and Minimum Description Length (MDL) approach. The experimental process uses Indonesian news articles with the number of documents at 25, 50, 90, and 600; in each document, the numbers of words are 3898, 7760, 13005, and 4365. The results show that the maximum likelihood and MDL approach result in the same number of optimal topics. The optimal number of topics is influenced by alpha and beta parameters. In addition, the number of documents does not affect the computation times but the number of words does. Computational times for each of those datasets are 2.9721, 6.49637, 13.2967, and 3.7152 seconds. The optimisation model has resulted in many LDA topics as a classification model. This experiment shows that the highest average accuracy is 61% with alpha 0.1 and beta 0.001.
SUATU KAJIAN PADA BCI-ALJABAR YANG TERKAIT DENGAN SIFAT DERIVASI KIRI Carolin, Carolin; farikhin, farikhin
Jurnal Matematika Vol 3, No 4 (2014): JURNAL MATEMATIKA
Publisher : MATEMATIKA FSM, UNDIP

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Abstract

Setiap-Derivasi kiri pada BCI- Aljabar X dapat dikatakan regular jika hasil derivasinya sama dengan nol atau setiap X idealnya merupakan D-invarian. Suatu himpunan dikatakan ideal pada X dengan -ideal jika , hal serupa dengan (-ideal jika ). Selain itu, himpunan  dikatakan ideal pada X dengan D-invarian jika. - Derivasi kiri BCI- Aljabar positif semisederhana merupakan hasil operasi biner antara endomorfisma dengan derivasinya. Himpunan  dikatakan torsi bebas BCI-aljabar jika kuadrat derivasinya atau komposisi derivasi pertama dan derivasi kedua sama dengan nol.Kata kunci :BCI-aljabar, BCI-aljabar p-semi sederhana, -Derivasi kiri,        D-invarian
Perbandingan Metode Perankingan Dalam Konteks Dea (Studi Kasus Model Perankingan Perusahaan Besar Di Indonesia) farikhin, farikhin
Prosiding SI MaNIs (Seminar Nasional Integrasi Matematika dan Nilai-Nilai Islami) Vol 1 No 1 (2017): Prosiding SI MaNIs (Seminar Nasional Integrasi Matematika dan Nilai Islami )
Publisher : Mathematics Department

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Abstract

Evaluasi kinerja merupakan bagian penting dalam suatu organisasi. Hasil evaluasi kinerja pada sekelompok unit organisasi dapat ditampilkan dalam bentuk peringkat. Model evaluasi kinerja pada suatu organisasi adalah model Data envelopment analisis (DEA). Model DEA disusun berdasarkan konsep efisiensi frontir. Selanjutnya, model ini juga dapat menganalisis lebih lanjut hubungan antara DMU yang efisien. Analisis ini dapat berupa pembentukan himpunan referensi DMU yang diamati dengan DMU tak efisien, dan perankingan antara DMU efisien. Dalam makalah ini, dibahas pendekatan matematis beberapa metode perankingan  DMU efisien. Pembahasan ini hanya pada beberapa metode perankingan yang disusun melalui konsep super efisien. Pada bagian akhir makalah ini, dipresentasikan hasil perankingan perusahaan besar Indonesia menggunakan beberapa metode perangkingan tersebut.
STUDI EMPIRIS MENGENAI PENILAIAN KINERJA JURUSAN DI BIDANG PENELITIAN MENGGUNAKAN DATA ENEVELOPMENT ANALYSIS (DEA) Farikhin, Farikhin; Noranita, Beta
JSINBIS (Jurnal Sistem Informasi Bisnis) Vol 3, No 3 (2013): Volume 3 Nomor 3 Tahun 2013
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21456/vol3iss3pp

Abstract

Performance evaluation of academic departments in university become routine activity to improve quality service.There qualitative and quantitative aspects to evaluate academic department. As well known that Data Envelopment Analysis (DEA) is one of non parametric technique based on linear programming. In this paper, we study to evaluate the academic departments with data envelopment analysis based on quantitative aspects. We formulate the performance evaluation as DEA problem. There are several stage to build DEA model as tool for the performance evaluation of academic departments. Firstly, we investigate purely quantitative variables in departement as input/output DEA model. Secondly, we discuss several ranking methods of decision making unit (DMU) to obtain efficiency of academic departments. In this paper, we use modified l1-norm method to rank DMU?s in DEA model. Keywords : DEA, DMU, and modified l1-norm method