Judul: Pengaruh Ventilasi pada Tutup Stup Kayu Lapis Seng Terhadap Produktivitas Propolis Apis mellifera
Abstrak: Propolis adalah salah satu produk lebah Apis mellifera yang bernilai ekonomis. Penelitian ini bertujuan mendapatkan ukuran optimum ventilasi pada tutup stup berlapis seng untuk meningkatkan produktivitas propolis. Tiga ukuran ventilasi tutup stup yaitu P1 (0 cm2), P2 (50 cm2), dan P3 (100 cm2) yang digunakan sebagai perlakuan untuk diterapkan pada 15 koloni lebah madu A. mellifera dalam sebuah penelitian menggunakan metode Rancangan Acak Lengkap (RAL) dengan 5 ulangan. Hasil penelitian menunjukkan bahwa ukuran ventilasi tidak berpengaruh nyata terhadap produksi propolis, madu, maupun susut koloni dengan rataan berturut-turut 15.53±3.78 g, 2 974.87±1 397.88 g, dan 6 592.78±3 408.17 ekor. Produktivitas propolis berbanding lurus dengan peningkatan suhu di dalam sarang dan penurunan koloni lebah. Sebaliknya, produksi propolis berbanding terbalik dengan produksi madu.
Keyword: Apis mellifera, propolis, ventilasi sarang

Judul: Aktivitas Terbang dan Produktivitas Lebah Trigona laeviceps pada Bahan Stup Kayu Sengon dan Kayu Lapis (Plywood)
Abstrak: Trigona laeviceps is one of stingless bees species which produce propolis and its productivity influenced by flight activity of the workers. This study aimed to obtain stup material place Trigona hive which may improve the weight of bees colony and increase production of propolis. The weight gain of colony was counted every week while propolis+bee pollen and honey was measured at the end of the study. Temperature, internal temperature, relative humidity, light intensity and wind speed were also measured. Daily flight activity of Trigona for obtain pollen/resin and nectar/water on sengon stup was very significantly higher (p<0.01) compared to the bees kept in plywood stup (80.40±41.40 vs 42.33±21.90 bees/day). The light intensity affect the daily flight activity (R2=78.3% in sengon stup and R2= 85.6% in stup plywood). Colony weight gain on sengon stup was significantly higher (p<0.05) as compared to those on plywood stup (23.70 vs -−8.44 g/week). Whereas the production of propolis+bee pollen and honey were not significantly different (24.77 and 19.66 vs 19.92 and 17.61 g/8 weeks).
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Judul: Feature Extraction Based on Color, Shape and Texture for Animal Image Retrieval.
Abstrak: The differences in color, shape, and texture characteristics between each animal cause difficulties in animal image retrieval. Therefore, specified technique is needed to obtain pattern from each animal’s feature so that image retrieval might works properly. One of the techniques to obtain the pattern done by feature extraction. This research tries to develop image extraction method in Content Based Image Retrieval approach by using three image visual features (color, shape, texture). In this research, Fuzzy Color Histogram (FCH) for color feature extraction is used through computing the membership function using Cauchy function. In FCH, one color may belong to two bins histogram or more with different membership functions. Then, shape feature is extracted using edge direction histogram, where each image is processed using Sobel edge detection, and then the direction is mapped into a defined bin histogram. For texture feature extraction, the process uses co-occurrence matrix with computing the values of energy, moment, entropy, maximum probability, contrast, correlation and homogeneity. Similarity value between image query and images in database is computed based on its features, those are color, shape, texture, and its combination. Recall and precision value resulted in this research shows the largest average precision value is obtained from searching process using index combination (color, shape, texture) of feature extraction. Keywords: feature extraction, Fuzzy Color Histogram, edge direction histogram, co-occurrence matrix
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