Judul: Antioxidant Activity dan Chemical Properties of Pasteurized Milk with the Addition of Lemongrass Powder (Cymbopogon citratus)
Abstrak: Public awareness about the safety of food additives has led to an increase in demand for safer sources of natural antioxidants. This study aimed to analyze the chemical properties and antioxidant activity of pasteurized milk with the addition of lemongrass powder. Lemongrass powder was added to the milk pasteurization process at levels of 0%, 1.5%, 2.0% and 2.5%. This study used a complete randomized design and the data were analyzed by variety analysis. The results showed that the addition of lemongrass powder increased inhibitory activity against 2,2-diphenyl-1-picrylhydrazyl, antioxidant capacity, protein content, and lactose of pasteurized milk. Pasteurized milk plus 2.5% lemongrass powder shows the best formula based on increased antioxidant activity, antioxidant capacity, protein content, and lactose., Kesadaran masyarakat tentang keamanan bahan tambahan pangan menyebabkan permintaan sumber antioksidan alami yang lebih aman meningkat. Penelitian ini bertujuan untuk menganalisis sifat kimia dan aktivitas antioksidan susu pasteurisasi dengan penambahan bubuk serai. Bubuk serai ditambahkan pada proses pasteurisasi susu dengan taraf 0%, 1,5%, 2,0% dan 2,5%. Penelitian ini menggunakan rancangan acak lengkap dan data dianalisis dengan analisis ragam. Hasil penelitian menunjukkan bahwa penambahan bubuk serai meningkatkan aktivitas penghambatan terhadap 2,2-diphenyl-1-picrylhydrazyl, kapasitas antioksidan, kadar protein, dan laktosa susu pasteurisasi. Susu pasteurisasi yang ditambah 2,5% bubuk serai menunjukkan formula terbaik berdasarkan peningkatan aktivitas antioksidan, kapasitas antioksidan, kadar protein, dan laktosa.
Keyword: antioxidant, lemongrass, pasteurized milk

Judul: Aktivitas Antioksidan dan Karakteristik Kimia Susu Pasteuriasi dengan Penambahan Bubuk Kapulaga Jawa (Amomum compactum)
Abstrak: Kecenderungan gaya hidup sehat telah memotivasi masyarakat untuk mengonsumsi produk pangan yang memiliki dampak positif bagi kesehatan. Penambahan kapulaga jawa pada susu pasteurisasi diharapkan akan meningkatkan nilai fungsional susu yang bermanfaat bagi kesehatan. Penelitian ini bertujuan menganalisis karakteristik kimia dan aktivitas antioksidan susu pasteurisasi dengan penambahan bubuk kapulaga jawa sebesar 0,5%, 1%, dan 1,5%. Penelitian dilakukan menggunakan Rancangan Acak Lengkap (RAL) dengan satu faktor. Data yang diperoleh dianalisis menggunakan ANOVA. Hasil penelitian dengan penambahan bubuk kapulaga jawa 1,5% menunjukkan perbedaan nyata (P<0,05) pada aktivitas antioksidan, kapasitas antioksidan serta kadar protein. Susu pasteurisasi dengan penambahan bubuk kapulaga jawa sebesar 1,5% memperoleh hasil terbaik untuk analisis karakteristik kimia dan aktivitas antioksidan dikarenakan memiliki kadar protein dan aktivitas antioksidan yang tinggi dibandingkan dengan perlakuan lain, yaitu protein (4,98%), aktivitas antioksidan (24,27%) dan kapasitas antioksidan (125,90 mg EVC 100 g-1).
Keyword: Antioxidant, Javanese cardamom, Pasteurized milk

Judul: 3D model reconstruction using aerial photo to measure object height
Abstrak: 3D reconstruction, especially for height extraction, using digital aerial photos taken from a non-metric camera and Unmanned Aerial Vehicle (UAV) is a challenging study. The purposes of the study are to determine the factors affect the accuracy of an object’s height reveal from a 3D model and establish procedures to deliver the optimal result. Two or more overlapping aerial photos can be constructed into the 3D model by applying the principles of collinearity and epipolar geometry using 3D reconstruction algorithm. Due to the instability of non-metric digital camera, the camera must be calibrated before 3D reconstruction is processed, in that way the quality of spatial extraction can be then measured. The study is conducted using 24 megapixels resolution Sony NEX7 digital camera and Hexacopter UAV. UAV was flown to a height of 50 m, 60 m and 70 m and placed at a certain position in order to get some height variations of camera. Camera Calibration Toolbox is utilized to calculate intrinsik parameters of the camera and a specific program is developed using MATLAB in order to build the 3D model and to obtain the object’s height. The result validation is done by comparing the height from 3D model with that one measured using Electronic Total Station. The accuracy of the object’s height up to 1 mm successfully achieved, with the largest height prediction error reaches 15.2 cm at 70 m flying height above ground level and average percentage error 4.07 for 20 objects.
Keyword: 3D reconstruction, collinearity, epipolar geometry, UAV