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ANALYSIS OF THE OPTIMAL PRODUCTION AREA IN METAL CASTING PT. SUYUTI SIDO MAJU KLATEN Purnama, Angga; Lastari, SE., MM, Siwi; Darini, M.Si., Dra. Sri
Management 2010
Publisher : Management

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Abstract

This study aims to (1) know the size of the optimal production volume, (2) know the level of maximum benefit to be obtained. This study uses linear programming analysis of simplex method with samples of products and equipment manufactured by companies that are the products of companies that rate high enough sales. Place this research is done in PT. Suyuti Sido Maju Klaten District Advancement and time in October 2005 to March 2006. The object that is broad optimum production and maximum profit. Collecting data in this study using interviews, observation and documentation. Analysis of the data used is the quantitative approach. The results of this study indicate: (1). According to mathematical calculations by using the Analysis of Linear Programming Simplex Method, a combination of products produced by PT.Suyuti Sido Maju reaching optimum production namely: End Bracked 300F (X1) = 700 units, Discharge Elbow (x2) = 1450 units, ejector Casing (X3) = 6500, 225 Bearing Cover (x4) = 6875 units, Fan 23 (X5) = 675 units. (2). Area of production that can provide profit / maximum profit for PT.Suyuti Sido Maju in 2005 is Rp. 214,937,500.00, excess cost advantage / profit conventionally and according to the Simplex Method is Rp. 17,737,500.00 Keywords : Production, metal.
SINTESIS Ni-TiO2 DENGAN METODE SOL-GEL DAN UJI AKTIVITASNYA PADA DEKOMPOSISI AIR Purnama, Angga; Priatmoko, Sigit; Wahyuni, Sri
Indonesian Journal of Chemical Science Vol 2 No 3 (2013)
Publisher : Indonesian Journal of Chemical Science

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Abstract

Telah dilakukan sintesis Ni-TiO2 dengan metode sol-gel dan uji aktivitasnya pada dekomposisi air. Tujuan dalam penelitian adalah mensintesis Ni-TiO2 dan mengetahui kinerja Ni-TiO2 dalam mendekomposisi air dengan gliserol. Ni-TiO2 disintesis menggunakan metode sol-gel dengan prekursor TIP sebagai media pendistribusian ion dopan. Karakterisasi terhadap material hasil sintesis meliputi: band gap, struktur dan ukuran kristal, porositas dan jumlah Ni yang terdopan berturut-turut menggunakan DR-UV, XRD, BET dan AAS. Ni-TiO2 diuji aktivitasnya menggunakan lampu UV dengan panjang gelombang 254 nm. Penambahan Ni masing-masing 1, 3, 5 10 terhadap massa TiO2 berturut-turut sebesar 3,33 eV, 2,71 eV, 2,60 eV, 2,54 eV dan 1,85 eV. Hasil karakterisasi XRD menunjukkan bahwa Ni-TiO2 mengalami perubahan dan intensitas struktur anatase pada sintesis Ni-TiO2, serta mengakibatkan ukuran kristal Ni-TiO2 menjadi semakin kecil seiring dengan banyaknya dopan Ni.