Judul: Analisis Faktor Produksi dan Pendapatan Usahatani Kemangi di Desa Ciaruteun Ilir, Kecamatan Cibungbulang, Bogor
Abstrak: Indigenous plants are well known as local plants growing and consumed by people in certain region. One of the indigenous plants is kemangi. It is planted by mostly farmers in Ciaruteun Ilir. There were two main objectives of this study; first is to analyse the production factors of kemangi in Ciaruteun Ilir, and second, to analyse its farm income. Thirty one respondents needed in this study, using the method of Purposive Sampling. The production factors were analysed by Cobb-Douglas Production Function using OLS methods. Based on the level of significance 5%, the results showed that there were two factors that effected kemangi production significantly; the seeds and the labors. The seeds affected the production positively, but on the contrary, the results showed that labors had negative effect to the production. The farm income was analysed using R/C ratio. The result showed that R/C ratio upon cash-cost was 2.11; it meant that this farming was beneficial for farmers. However, the R/C ratio upon total-cost was 0.82. This meant that the farming was beneficial financially, but wasn’t economically.
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Judul: Analisis Efisiensi Teknis dan Pendapatan Usahatani Talas di Kecamatan Kemang, Kabupaten Bogor
Abstrak: Kecamatan Kemang merupakan salah satu sentra produksi talas di Kabupaten Bogor, akan tetapi terdapat permasalahan yang dihadapi oleh petani dari sisi input produksi sehingga produksi belum maksimal. Penelitian ini bertujuan untuk 1) mengidentifikasi faktor-faktor yang memengaruhi produktivitas, 2) menganalisis efisiensi teknis, 3) menganalisis pendapatan usahatani talas di Kecamatan Kemang, Kabupaten Bogor. Penelitian ini menggunakan fungsi produksi Frontier Cobb-Douglas dengan metode Maximum Likelihood Estimation (MLE) untuk mengetahui faktor-faktor yang memengaruhi produktivitas, Stochastic Frontier Analysis (SFA) untuk mengetahui efisiensi teknis, dan analisis R/C Ratio untuk mengetahui keuntungan usahatani talas. Hasil penelitian menunjukkan bahwa faktor-faktor yang berpengaruh signifikan terhadap produktivitas usahatani talas adalah pupuk kandang dan tenaga kerja. Rata-rata efisiensi teknis sebesar 0,71 yang artinya usahatani talas sudah efisien. Faktor-faktor yang berpengaruh signifikan terhadap inefisiensi teknis yaitu pengalaman usahatani, dummy status pekerjaan, dan dummy pengelolaan lahan. Nilai R/C Ratio menunjukkan bahwa usahatani talas di Kecamatan Kemang dapat memberikan keuntungan., Kemang District is one of the centers of taro production in Bogor Regency, but there will be problems faced by farmers from the production side so that production is not maximized. This research aims to (1) identify the factors that affect the productivity (2) analyze the technical efficiency, (3) analyze the income of taro farming in Kemang District, Bogor Regency. This research uses the Frontier Cobb-Douglas production function with the Maximum Likelihood Estimation (MLE) method to determine the factors that affect the productivity, Stochastic Frontier Analysis (SFA) to determine the technical efficiency, and analysis of the R/C Ratio to determine the benefits of taro farming. The results showed that the factors that had a significant effect on the productivity of taro farming are manure and labor. The average of the technical efficiency of taro farming is 0.71, which means that taro farming is efficient. Factors that have a significant effect on technical inefficiency are farming experience, employment status dummy, and land management dummy. The R/C Ratio value shows that taro farming in Kemang District can provide benefits.
Keyword: Technical Efficiency, Productivity, R/C Ratio, Stochastic Frontier Analysis

Judul: Hydroxyapatite-Chitosan Composite Coating on Stainless Steel 316 to Improve Corrosion Resistance
Abstrak: Metals that were used in bone implantation should have good corrosion resistance that were not easily corroded when implanted into the body. Metal corrosion resistance of stainless steel 316 can be enhanced through the metal coating by hydroxyapatite-chitosan composite with composition ratio of hydroxyapatite (gram) and chitosan 3% (mL) 0.2:0, 0.2:0.1, 0.2:0.5, 0.2:1.0, and 0.2:1.5. Besides improving the corrosion resistance of metal, the presence of chitosan also maintain the position of hydroxyapatite on metal surfaces. Corrosion resistance increases with increasing amount of chitosan added and the best composition of hydroxyapatite-chitosan composite was 0.2:1.0.
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