Judul: Peningkatan Umur Simpan Tempe Bacem dengan Metode Vakum pada Beberapa Kondisi Penyimpanan
Abstrak: Tempe bacem is a kind of tempe product that has spicy and sweet taste. The shelf life of this product is very short. The objective of this research was to increase tempe bacem’s shelf life by vacuum and non-vacuum packaging that stored in different conditions. Tempe that used in this research was in round form with 5 cm of diameters and 1 cm of thick. Tempe bacem was processed by selected formula, packaged by vacuum and non-vacuum and then stored in room condition (26-300C) and refrigerator condition (100C). Total protein in this product was 33.7% (db), fat 0.9% (db), ash 3.0% (db), carbohydrate 66% (db), while antioxidant capacity was 194.65 mgAEAC/100 g tempe. The pH value in tempe bacem was 5.7, lightness 35.9, hardness 2848.5 gram force, total TPC 1.8x103 CFU/g and total koliform <3.0 MPN/g. The shelf life of tempe bacem that packaged by non-vacuum method in room condition was 2 days, and in refrigerator condition was 6 days. The shelf life of tempe bacem that packaged by vacuum method in room condition was 3 days and in refrigerator condition was 18 days.
Keyword: Bogor Agricultural University (IPB), tempe bacem, shelf life, vacuum packaging

Judul: Mempelajari Keawetan Tempe Pasteurisasi Dalam Kemasan Vakum HDPE dan Alumunium Foil
Abstrak: Tempe is very perishable food at room temperature. Several techniques used to process tempe for its preservation have been developed. These processing techniques include drying, frying, and canning have been used to achieve long shelf life of tempe, with the significant loss of tempe’s freshness. The objective of this research was to evaluate the effect of pasteurization process, as a milder heat treatment, in combination with vacuum packaging on extending shelf life of tempe. Using a target microbe of nonproteolytic C. botulinum with z value of 7.2 oC and D85 of 0.28 minutes, the extent of pasteurization process was based on the heat penetration data and calculated as Pv = P85 (z=7.2). Our result indicated that 6D reduction of C. botulinum was easily achieved at all temperatures of pasteurization. Futhermore, from several combinations of time and temperature studied, the optimum pasteurization value resulted in maximum shelf life of pasteurized tempe. The optimum pasteurization values of tempe vacuum packed in HDPE and stored at 5, 15, and 20 oC were 35.05, 35.36 and 33.30 minutes. The associated maximum shelf life of the tempe were 24, 16, and 13 days. For tempe vacuum packed in aluminium foil and stored at 5, 15, and 20 oC, the optimum pasteurization values were 37.04, 35.44, and. 42.47 minutes. These optimum pasteurization values resulted in shelf life of 25, 17, and 12 days. Therefore, the longest shelf life of 25 days was obtained from P85 (z=7.2) of 37 minutes by using aluminium foil packaging and stored at 5 oC. The anomaly observations, in which the shelf life was not proportional to the pasteurization value, was interesting and thought to be associated with complex microbiological nature of tempe as fermented soyfood.
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Judul: Identifikasi Karakter Pada Plat Nomor Kendaraan Menggunakan Ekstraksi Fitur ICZ dan ZCZ dengan Metode Klasifikasi K-NN
Abstrak: License plate is a unique code consisting of letters and numbers arrangement. Each vehicle has a license plate that serve as the identity code of the vehicle itself. Since license plates are unique, it often used for recording, such as in the parking area. The character identification characters on the license plates are made automatically using the input in the form of license plate images to facilitate the recording process. K-NN classification and feature extraction ICZ and ZCZ used in the identification of character identification. ICZ and ZCZ feature extraction obtain features by computing the character centroids and divide the image into n equal zones then computing the average distance from the character centroid to every pixel in the image. The character identification accuracy using 14 zones and ICZ are 97.00% while using ICZ+ZCZ feature extraction are 98.17%. The license plate identification accuracy using feature extraction plates ICZ+ZCZ are 72.31% for zero tolerance and 89.23% for one fault tolerance.
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