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ENHANCEMENT CITRA PANORAMIK GIGI DENGAN PEMBAGIAN CITRA ARAH MENGGUNAKAN DECIMATION-FREE DIRECTIONAL FILTER BANK Jawas, Naser; Wijaya, Arya; Arifin, Agus
Lontar Komputer Vol. 5, No.1 April 2014
Publisher : Teknologi Informasi Fakultas Teknik Universitas Udayana

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Abstract

Citra radiograf panoramik gigi dapat digunakan untuk mendeteksi penyakit osteoporosis. Sistem deteksi osteoporosis secara digital digunakan untuk meningkatkan ketelitian dan mempermudah pengukuran. Proses enhancement citra digital radiograf panoramik gigi diperlukan untuk membantu memperbaiki atau memperjelas bagian-bagian yang penting di citra tersebut seperti bagian cortical. Bagian cortical yang memanjang secara horizontal sering memiliki bagian dengan iluminasi tidak merata di bagian tengah dengan arah vertikal yang menyulitkan proses pengukuran. Pemerataan iluminasi dengan metode filterisasi homomorfik cenderung mengalami over-enhancement. Oleh karena itu, Pada penelitian ini diusulkan metode enhancement citra radiograf panoramik gigi dengan menggunakan pemecahan citra ke dalam citra arah horizontal dan citra arah vertikal. Pemecahan citra ke dalam citra arah dilakukan dengan menggunakan Decimation-Free Directional Filter Bank. Pemerataan iluminasi dilakukan di masing-masing citra arah. Hasilnya menunjukkan proses filterisasi homomorfik yang dilakukan di citra arah ini efektif membantu menghindari over-enhancement.
TERM WEIGHTING BERBASIS INDEKS BUKU DAN KELAS UNTUK PERANGKINGAN DOKUMEN BERBAHASA ARAB Fauzi, M. Ali; Arifin, Agus; Yuniarti, Anny
Lontar Komputer Vol. 5, No. 2 Agustus 2014
Publisher : Teknologi Informasi Fakultas Teknik Universitas Udayana

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Abstract

Information Retrieval berdasarkan query tertentu sudah jamak ditemukan pada sistem komputer saat ini. Salah satu metode yang populer digunakan adalah perangkingan dokumen menggunakan space vector model berbasis pada nilai term weighting TF.IDF. Pada penelitian ini, terdapat beberapa buku berbahasa Arab yang memiliki puluhan bahkan ratusan halaman. Masing-masing halaman dari buku tersebut adalah sebuah dokumen yang akan diranking berdasarkan query dari pengguna. TF.IDF hanya melakukan pembobotan berbasis pada dokumen tanpa memperhatikan indeks buku dan kelas yang merupakan induk dokumen tersebut sehingga kinerjanya kurang maksimal jika diimplementasikan pada kasus ini. Oleh karena itu, diusulkan metode baru term weighting yang berbasis pada indeks buku dan kelas. Metode ini memperhatikan frekuensi kemunculan term pada keseluruhan buku dan kelas. Metode yang disebut inverse class frequency (ICF) dan inverse book frequency (IBF) ini digabungkan dengan metode sebelumnya sehingga menjadi TF.IDF.ICF.IBF. Pengujian metode ini menggunakan dataset dari beberapa e-book berbahasa arab. Hasil penelitian menunjukkan bahwa metode yang diajukan terbukti dapat diaplikasikan pada perangkingan dokumen berbahasa arab dan memiliki performa yang lebih bagus dibanding metode sebelumnya dengan nilai F-Measure 75%, precision 76%, dan recall mencapai 74%.
PENGUKURAN OTOMATIS LEBAR CORTICAL BONE PADA DENTAL PANORAMIC RADIOGRAPH Arhandi, Putra; Arifin, Agus; Khotimah, Wijayanti
Lontar Komputer Vol. 5, No. 2 Agustus 2014
Publisher : Teknologi Informasi Fakultas Teknik Universitas Udayana

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Abstract

Akhir akhir ini banyak dilakukan penelitian mengenai citra medis yang bertujuan untuk membantu dokter dalam menganalisa sebuah penyakit. Salah satu citra medis yang sering diteliti adalah dental panoramic radiograph (DPR). Bagian dari DPR yang dianalisa adalah lebar dari cortical bone pada rahang bawah karena lebar cortical bone pada rahang bawah mempunyai hubungan yang signifikan terhadap kepadatan tulang di tulang pinggul, tulang belakang dan leher tulang paha. Oleh karena itu lebar dari cortical bone ini dapat dijadikan sebagai parameter untuk identifikasi osteoporosis. Pada penelitian sebelumnya diusulkan metode pengukuran ketebalan cortical bone otomatis dengan menggunakan deteksi tepi (canny) yang dimodifikasi, kemudian dibantu dengan active contour model (ACM) untuk mendapatkan tepi luar cortical bone dan greyscale profile analysis untuk menghitung ketebalan dari tepi luar cortical bone. Namun dalam proses greyscale profile analysis ini masih dapat terjadi kesalahan dan masih belum mempertimbangkan keadaan dari pixel tetangga. Pada penelitian ini, dibangun sebuah metode untuk mengukur ketebalan cortical bone secara otomatis dengan memanfaatkan deteksi tepi (canny), yang dibantu dengan active contour model untuk mendapatkan tepi luar dan greyscale profile analysis yang memperhatikan keadaan dari pixel tetangga. Metode ini berhasil mengukur lebar cortical bone dengan rata-rata korelasi sebesar 0,88 untuk tulang rahang kanan pada window 50 pixel dan 0,89 untuk tulang rahang kiri pada window 75 pixel
Analisis Perilaku Kurs Rupiah Terhadap Dolar AS Selama Empat Periode Pemerintahan di Indonesia Metode Box-Jenkins (ARIMA) Arifin, Agus
EKO-REGIONAL Vol 4, No 1 (2009)
Publisher : Jurusan Ilmu Ekonomi dan Studi Pembangunan Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.erjpe.2009.4.1.416

Abstract

This research attempts to analyze the behavior of exchange rate (Rp/$US) over the period 1998-2007 which passed four governments: Habibie, Gusdur, Megawati, and SBY. The method using in this research is Box-Jenkins with Autoregressive Integrated Moving Average (ARIMA). It tested various models to find the best one and then using it to forecast the behavior of exchange rate. The data needed in this research is only exchange rate (Rp/$US) over the period 1998-2007. The research results show: (1) The best model is AR(1); (2) The forecasting of exchange rate behavior until the end of 2007 shows the stability with average value at Rp9417,13; (3) There is no significantly structural changes among four governments.   Keywords: Box-Jenkins, ARIMA, exchange rate
Struktur Industri, Tingkat Produktivitas, dan Efisiensi Ekonomis dalam Pemenuhan Kebutuhan Hidup Layak (Studi Empiris Perajin Tahu Desa Kalisari, Cilongok, Banyumas Vs Perajin Tahu Desa Kalikabong, Kalimanah, Purbalingga) Arifin, Agus
EKO-REGIONAL Vol 6, No 2 (2011)
Publisher : Jurusan Ilmu Ekonomi dan Studi Pembangunan Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.erjpe.2011.6.2.446

Abstract

The purposes of this research are to analyze the industry structure, productivity, economic efficiency, and the living standard of labor in tahu industry centre in Kalisari village, Cilongok district, Banyumas regency compare with those in Kalikabong village, Kalimanah district, Purbalingga regency. This research is to study which industry centre better. This research is conducted with qualitative and quantitative analysis that uses Herfindahl Index (HI) and Concentration Ratio (CR) analysis to analyze industry structure and concentration; output-input and regression to measure the productivity; R/C ratio to analyze economic efficiency; then income-UMK ratio and income- KHL ratio to analyze living standard of labor. The results show that: (1)Both of tahu industry centre in Kalisari and Kalikabong are perfect competition market. Industry in Kalikabong is more concentrated; (2) the productivity of labor in Kalisari is higher than in Kalikabong (3) the tahu enterprises in Kalisari more efficient than in Kalikabong (4) All of tahu enterpreneurs in Kalisari and Kalikabong are more than living standard level based on profit received, but many labors are less than living standard level based on wage received.  Keywords: industry structure, productivity, efficiency, labor, living standard
Externalities of Hair Industry within Nucleus-Plasma Partnership in Purbalingga Arifin, Agus; Priyono, Rakhmat
EKO-REGIONAL Vol 13, No 2 (2018)
Publisher : Jurusan Ilmu Ekonomi dan Studi Pembangunan Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.erjpe.2018.13.2.1178

Abstract

The aim of this research is to analyze negative externalities of hair industry in Purbalingga Regency. The focus of this research is the effects of hair production activities of nucleous-plasma partnership as part of hair production system. It has been proven that this industry benefits many parts of societies and assists local government program in reducing unemployment and increasing social welfare by labour absorption. However negative externalities have already occured in social and economic views. This research takes samples of 2 factories, 5 plasmas, and 25 workers. The methods using in this research are Dollar-based Ecosystem Valuation Methods. The results show that there are degradation of social interaction among internal family community, reduction of children’s spirit and motivation to achieve high education level, and increasing waste water that endangers to ecosystem.Keywords: Externalities, Haircraft Industry, Nucleus-Plasma, Social Interaction, Waste Water.
Pangsa Ekonomi Sektoral dan Tipologi Daerah di Wilayah Jawa Bagian Tengah Arifin, Agus; Rahajuni, Dijan
EKO-REGIONAL Vol 2, No 2 (2007)
Publisher : Jurusan Ilmu Ekonomi dan Studi Pembangunan Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.erjpe.2007.2.2.395

Abstract

Economic potency in region of central Java is interesting to analyze. On 2000 to 2004, this region had referred to structural economic changing. Basic sectors, which was being prime sectors on 2000, has declined the role be the main regional income on 2004. The new cities establishment on this region, late of 90’s, may have important role to the structural change. It has driven modern activities that gave significant contribution to regional income. Nevertheless, regional typology shows the income disparities among the regency on this regions. Especially, the regions with low per capita income and coincide with low economic growth should need to concern. Without appropriate and wise policy, these regions will always left behind from the other regions if they are compared by the regions that have better typology.  Keywords: economic potency, regional typology, income disparities
Kenaikan Jumlah Penduduk Usia Produktif Berkontribusi Positif terhadap Pengangguran di Kabupaten Banyumas Arifin, Agus
EKO-REGIONAL Vol 7, No 1 (2012)
Publisher : Jurusan Ilmu Ekonomi dan Studi Pembangunan Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.erjpe.2012.7.1.458

Abstract

This research is aimed to study the influence of the number of productive age workforce, economic growth, and the number of small-medium business toward unemployment in Banyumas Regency. This research uses quantitative method by using the secondary data. The analysis methods of this research are Multiple Linier Regression and Elasticity of Coefficient Linier Regression. The result of research shows that each of independent variables, partially, influences the dependent variable (the number of unemployment) in Banyumas Regency. The number of productive age has a positive influence, so that an increasing of the number of productive age workforce will increase the number of unemployment. While, either the economic growth or the number of small-medium business has the negative influence so that each of those variables will decrease the number of unemployment.  Keywords: productive age workforce, economic growth, small-medium business, unemployment
Efisiensi Ekonomis dan Teknis Usaha Tani Singkong pada Kelompok Tani di Desa Banteran, Sumbang, Kabupaten Banyumas dan di Desa Selakambang, Kaligondang, Kabupaten Purbalingga, 2010 Arifin, Agus; Setiarso, Oke
EKO-REGIONAL Vol 5, No 2 (2010)
Publisher : Jurusan Ilmu Ekonomi dan Studi Pembangunan Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.erjpe.2010.5.2.433

Abstract

The purposes of this study are to analyze the effect of labor, land, seed, fertilizer, and capital on the production of cassava; to analyze the economic efficiency and technical efficiency in cassava farming between farmer groups in Banyumas and Purbalingga; and to analyze the difference of economic and technical efficiencies of cassava farming in Banyumas and Purbalingga. This research is conducted with qualitative and quantitative analysis based on production function with a stochastic frontier approach (Stochastic Frontier Production Function): regression analysis, maximum likelihood (MLE), the analysis of technical efficiency(DEA), economic efficiency, price efficiency, and Return-Cost (R/C) ratio. The result shows there are only three significant independent variables namely labor, land, and capital. Based on analysis of technical efficiency (ET), there are only ten efficient farmers in Banyumas and four efficient farmers in Purbalingga. The results from the efficiency of the price and economic efficiency show that the farming of cassava has no efficient in both of farmer groups in Banyumas and Purbalingga. From the calculation of technical efficiency, price efficiency, and economic efficiency, it can be concluded that cassava farming has no efficient. The results from R/C ratio indicate that cassava farming in both of them are quite profitable. Keyword:  economic efficiency, efficiency price, return-cost ratio, stochastic frontier, technical efficiency
Analisis Keunggulan Produk Kerajinan Rambut di Desa Karang Banjar Kecamatan Bojongsari, Purbalingga, 2007 (Pendekatan Revealed Comparative Advantage (RCA) dan Sustainable Competitive Advantage (SCA)) Arifin, Agus
EKO-REGIONAL Vol 3, No 1 (2008)
Publisher : Jurusan Ilmu Ekonomi dan Studi Pembangunan Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.erjpe.2008.3.1.400

Abstract

            This research was aimed to evaluate the advantage of hair production in Karangbanjar village, Bojongsari, Purbalingga, Central Java, wherefore this product has the mainly advantage in Purbalingga regency. The analysis object is small enterprises in the hair production centre which is the traditional hair product located in Karangbanjar village. The product advantage was analyzed through comparative and competitive advantages approaches. The research tools are Revealed Comparative Advantage (RCA) to analyze comparative advantage and Sustainable Competitive Advantage (SCA) to study competitive advantage. The results obtained from this research are based on product advantage analysis, small enterprises of hair production exactly have comparative and competitive advantages.  Key words: comparative advantage, competitive advantage, hair production