Judul: Analisis Usaha Pengrajin Tahu Sumedang Sebelum dan Setelah Kenaikan Harga Kedelai (Studi Kasus: Kecamatan Tanjungsari, Sumedang)
Abstrak: Soybean is one of the food that the price level is fluctuated. The soybean price increase will affect the soybean processing industry, one of which is tofu industry. The soybean prices increase are expected to affect the structure of cost, revenue, profit, and the efficiency of a business. This research aimed to analyze of tofu industry business before and after the soybean price increase. The method that used in the study was a census method. Data were analyzed quantitatively and qualitatively. The analytical tool used is the R / C ratio, paired t-test, and anova test. The results of the analysis of a total of 20 respondents showed that the soybean price increase has effect on the cost, revenue, profit, and the R/C ratio, as well as with an internal analysis of business scale. However, the results of the analysis at different levels of scale of business is no different. This is due to the small sample size in each scale of business and strategy performed relatively the same at every scale of business, so it can not represent the whole population in the District Tanjungsari, Sumedang.
Keyword: the soybean price increase, profit, efficinecy, different test, cost

Judul: Dampak Kenaikan Harga Kedelai Terhadap Tiga Usaha Kecil dan Menengah Tahu Kota Bogor
Abstrak: Inability to meet the needs of domestic soybeans make Indonesia dependence on imports. Consequently there is no certainty of domestic supply availability and price stability of soybean. The increased price of soybeans in the country influenced by the world soybean prices often occur and cannot be avoided by tofu industries that are consumers of imported soybeans. With the diversity of tofu business scale existing in Indonesia, the impact of rising soybean prices will vary from one tofu business to others. Therefore, this study uses three samples with different scale business to compare the impact of rising soybean prices. Classification of used business scale is based on the amount of daily production capacity, that is the scale of households with a daily production capacity of ≤ 100 kg, small scale with a daily production capacity of 101-200 kg, and medium scale with a daily production capacity of 201-300 kg. The indicators used in this study is the profitability value, value-added and sensitivity. The results obtained are that v medium-sized tofu businesses generate the highest profitability value and valueadded, and are the most resistant tofu business in encountering the increased soybean prices. However, the results obtained by medium-sized tofu businesses are not much different from the value obtained by small-sized tofu businesses. Thus, in this study, small and medium-sized tofu business generate insignificantly different profitability value, value-added, and the sensitivity.
Keyword: Bogor Agricultural University (IPB), tofu, profitability, value added, soybean price fluctuations

Judul: Construction of Strongly Optimal Binary Linear Code with Minimum Distance 9 and 11
Abstrak: A binary linear code of length n over q F is a subspace of n q F . A code has three parameters that attached to it, namely length, dimension, and minimum distance. A code with length n, dimension k and minimum distance d is often called [n, k, d ]-code. Usually, when two parameters are given, then we want to find a code that has the best value for the last parameter. Based on Gilbert- Varshamov bound, if a [n, k, d ]-code exists and can not be expanded, we call it a strongly optimal code. In this paper, we construct strongly optimal code with minimum distance 9 and 11. In constructing the code, we created a theorem and algorithm based on Gilbert-Varshamov bound before we implement the algorithm to MAPLE programming language. Because of computational limitations, the program can only construct up to k = 10 for d = 9 and k = 12 for d = 11.
Keyword: