Judul: Solusi Numerik Persamaan Black-Scholes Kasus Opsi Jual Eropa dan Amerika dengan Fluktuasi Saham Berlintasan Brownian
Abstrak: Opsi merupakan instrumen keuangan turunan dari aset yang mendasarinya. Opsi jual memberikan hak bukan kewajiban kepada pemegang opsi untuk menjual sejumlah tertentu dari sebuah aset yang menjadi dasar kontrak tersebut. Opsi tipe Amerika memberikan kesempatan kepada pemegang opsi untuk mengeksekusi haknya setiap saat hingga waktu jatuh tempo. Sedangkan opsi tipe Eropa hanya memberikan kesempatan kepada pemegang opsi untuk mengeksekusi haknya pada saat waktu jatuh tempo. Model yang digunakan untuk menentukan harga opsi jual tipe Eropa dan Amerika adalah model Black-Scholes. Selanjutnya, model pergerakan saham dimodelkan menggunakan random generator di Matlab untuk menghasilkan lintasan Brownian pada harga saham. Model ini dapat diselesaikan dengan menggunakan metode eksplisit beda hingga.
Keyword: Black-Scholes, opsi jual, Gerak Brownian, metode eksplisit beda hingga

Judul: Penentuan Nilai Opsi Tipe Eropa dan Amerika Menggunakan Metode Binomial
Abstrak: Investors have purposes to obtain maximum returns, but they must be careful to invest their money because they may take risk. Therefore, they need products to reduce the risk. The products are called derivative products. There are many kinds of derivative products, such as options. An option is a type of contract between two parties. One party gives the other party a right to sell or to buy some assets in a certain price and in a certain period. Based on their execution time, there are two types of options i.e. European styles and American styles. European style options can only be exercised at expiration time, meanwhile American style options can be exercised at random time to the expiration time. In this paper, the option price at a discrete time will be determined by using binomial model. A binomial model is a model that describes asset price movements by assuming two possibilities of asset price movements in the future. Those are up and down. One-step binomial structures can be expanded into multistep binomial structures in order to approximate the option price. The application of one-step binomial model is used on the European option and multi-step binomial model is used on the American option. The acquired formula is applied to calculate the value of call option of PT Telekomunikasi Indonesia stocks in January 2012 based on the data of January to December 2011’s fluctuation of stock.
Keyword: American Style., European Style, Options, Binomial Model

Judul: Konsumsi Pangan, Penyakit Infeksi, dan Status Gizi Anak Balita Pasca Perawatan Gizi Buruk
Abstrak: The research objective was to determine food consumption, infectious diseases, and nutritional status of children under five years old post-treatment of severe malnutrition. The cross-sectional study design was conducted in four subdistrics of Darmaga, Ciampea, Cibungbulang, and Leuwiliang. The number of 27 children were selected as a samples. The results showed that 88.9% and 77.8% of children consumed less than 70% energy and protein RDA. In the last three months, the most of children suffered from diarrhoea (55.6%) and ARI (59.3%). The duration of sick days for diarrhoea was ~3 days and ARI was ~7 days. There was 81.5% of samples still in severe malnutrition and only 18.5% of them shifted to the moderate malnutrition.
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