Judul: Pengoptimuman Risiko dan Profit dalam Perencanaan Investasi Bank dengan Metode Goal programming dan Fuzzy Goal Programming.
Abstrak: Bank is defined as a financial institution that operates to collect funds from the public in the form of deposits and distributing the funds to the public in the form of credit, etc. Sources of bank funding come from equity capital, demand deposits, time deposits, and saving deposits. The funding will be used for a variety of financing, especially to the assets that can generate profits, such as credit, investment, etc. In the bank investment problem there are three objective functions, which minimize the risk assets, maximize the profit, and minimize the capital adequacy. In this work, the problems are formulated in the form of goal programming (GP) and fuzzy goal programming (FGP) and solved by using LINGO 11.0. GP method requires the decision maker precisely define the aspiration level of each objective function to be achieved. But in many cases the aspiration levels are not properly determined, they are intrinsically fuzzy. FGP method uses imprecise aspiration level for each fuzzy goal. The fuzzy goals are to be characterized by their respective membership functions. Therefore by determining the tolerance value for each fuzzy goal, each goal will be obtained at an interval specified tolerance. The goals are risk assets =707.5∈ 595,805 , profit =28100∈ 26695,29505 , and capital adequacy =118.5∈ 64.9,171.5 .
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Judul: Optimization of Determination Production Levels Using Fuzzy Integer Goal Programming
Abstrak: Perencanaan sangat diperlukan suatu perusahaan dalam proses produksi guna memenuhi berbagai tujuan (multi objective) yang ingin dicapainya. Berbagai tujuan yang terlibat seringkali memiliki informasi dan nilai target yang tidak tepat sehingga menimbulkan ketidakjelasan yang bersifat fuzzy. Penelitian ini bertujuan membangun model masalah tingkat produksi berdasarkan Fuzzy Integer Goal Programming (FIGP). Solusi model berupa rekomendasi kuantitas produk yang sebaiknya diproduksi di masa mendatang. Tujuan yang tidak akurat diwakili oleh fungsi keanggotaan fuzzy yang menunjukkan derajat pencapaian setiap tujuan dengan mempertimbangkan sasaran dan batas toleransi yang ditetapkan pengambil keputusan. Model FIGP diformulasikan pada dua pendekatan yaitu operator-min Bellman dan Zadeh dan FIGP berbobot. Model diimplementasikan menggunakan bantuan perangkat lunak LINGO 11.0 pada perencanaan produksi usaha rumahan (home industry) kue bolu. Kedua pendekatan FIGP ini memperoleh hasil tingkat produksi yang lebih baik dibandingkan dengan realisasi produksi dan hasil model program linear multi objektif de Novo dengan pendekatan IGP., Planning is necessary for a company in the production process in order to meet the various objectives (multi objectives) that it wants to achieve. The various objectives involved often have inaccurate information and target values, giving rise to fuzzy obscurity. This study aims to build production level problem models based on Fuzzy Integer Goal Programming (FIGP). The model solution is in the form of recommendations for the quantity of products that should be produced in the future. Inaccurate goals are represented by fuzzy membership functions that show the degree of achievement of each goal by considering the goals and tolerance limits set by the decision maker. The FIGP model is formulated in two approaches, namely Bellman and Zadeh min-operators and weighted FIGP. The model is implemented using the LINGO 11.0 software in the production planning of a sponge cake home industry. Both of these FIGP approaches obtained better production rates than the actual production and the result of de Novo multiobjective linear programming model with IGP approach.
Keyword: fuzzy membership function, Fuzzy Integer Goal Programming (FIGP), production planning

Judul: Characteristic of chili drying (Capsicum annum L.) as a natural dyeing cosmetic
Abstrak: Chilli (Capsicum sp.) contains carotenoids, which are a group of natural pigments consist of red, orange or yellow color. Carotenoids can be dissolved in lipid so that they can be applied to oil-based cosmetic ingredients. Therefore, chilli is potential to be developed as cosmetic colorants. However, pungency of red chili needs to be removed because it is irritating and it provides stinging sensation to skin. Red chilli was investigated as a potent material for a cosmetic colourant in this research because it has a nice uniform red color and has a pungency level less than cayenne pepper. The purpose of this research was to investigate the influence of blanching on drying characteristics of red chilli using a tray dryer, determine the proper time of chili blanching in sodium bisulfite solution, examine color changes stability of red chili powder as a cosmetic dye, and analyze the effect of oleoresin extraction on color and pungency level of red chili powder. The results showed that blanching could affect the drying characteristics. Blanching the chilli for 9 minutes prior drying could speed up the drying rate of chilli and thus the drying time, therefore, the chilli achieved the desired moisture content fast. Sodium bisulfite solution of 0.2%, used as the blanching media, could maintain the color well. However, longer time of blanching might cause several pigments soluble in the blanching media. Blanching the chilli for 9 minutes was able to maintain red color after the stability tested and after extraction of oleoresin. Therefore, blanching red chilli in a solution of 0.2% sodium bisulfite for 9 minutes prior drying is concluded as the best treatment to retain the color of red chilli powder
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