Judul: Penelitian untuk Aplikasi Mobile Munsell Soil Color Chart Berbasis Android Menggunakan Histogram Ruang Citra HVC dengan Klasifikasi k-NN
Abstrak: Soil color determination is a challenging task because of the various types of soil and the high similarity of soil color. Munsell Soil Color Chart (MSCC) is used to overcome this issue. The purpose of this research is to develop an androidbased mobile application to identify the major color of soil according to MSCC. The application utilized HVC color model with hue, value, and chroma color components. The hue color component had been the main concern of this research, although the value and chorma color components were also observed. The training data were 259 images from MSCC, with 1600 pixels each. Hue color data from these pixels were analyzed in the form of histogram and classified with k-NN. The results showed that the highest classification accuracy of hue value was 45% at k=5, this accuracy may be improved by utilizing the soil color data that are available online.
Keyword: Munsell Soil Color Chart., k-NN, HVC, Android, Bogor Agricultural University (IPB)

Judul: Aplikasi Perangkat Uji Pupuk Berbasis Android Menggunakan Fitur Warna
Abstrak: The distribution of counterfeit fertilizer has bring many disadvantages to farmers. To overcome this issue, the Ministry of Agriculture has developed the Fertilizer Test Kit that can be used directly in the field. However, the categorization of nutrient levels are still done manually by using a color chart. Therefore the nutrient level classes are limited to 2.5%, 5%, 10%, 15%, and 20%. The purpose of this research is to improve the classification of fertilizer nutrient level, both from the precision and simplicity. K-Nearest Neighbors (kNN) is used as the classification method with k = 3, 6, and 9. The histrogram of hue component in HSV color space is treated as the feature. Classification is done with 2% resolution to Nitrogen (N) and Phosphorus (P) nutrient levels. The results showed that the best accuracy is 79.54% for N with a root mean square error value (RMSE) of 1.59 and 30% for P with RMSE 4,764. Both were obtained at k = 9.
Keyword: Bogor Agricultural University (IPB), k-nearest neighbour (kNN), Hue Saturation Value (HSV), fertilizer test kit

Judul: The Effects of Hypothyroidism in the Fertility of Male Rats
Abstrak: Thyroid hormones are involved in the development and maintenance of virtually all tissues. The purpose of the study is to understand effects of the neonatal hypothyroidism in the fertility of male rats. Recent studies with juvenile rats indicate that changes in thyroid function early in life have a major impact on the endocrine and/or paracrine factors regulating testicular growth and function. However, one should keep in mind that hypothyroidism is a complex hormonal dysfunction rather than a single hormonal defect. Hypothyroidism has been also shown to reduce the secretion of GnRH (gonadotropins releasing hormone), LH (Luteinizing Hormone), FSH (Follicle Stimulating Hormone), GH (Growth Hormone) and testicular testosterone in rats. Therefore, many of the testicular changes observed in prolonged hypothyroidism could result in some degree of diminished levels of the aforementioned hormones. The transient neonatal hypothyroidism model results in the unnatural testicular development and in sperm production in neonates hence resulting in decreased fertility upon puberty.
Keyword: Hypothyroidism, Neonates, Testicular Growth, Fertility