Judul: Mempelajari Perubahan Sifat Fisikokimia dan Laju Penetrasi Garam Pada Fillet Ikan Tongkol (Euthynus affinis) Setelah Disimpan Beku
Abstrak: Tujuan penelitian ini adalah untuk mempelajari per- ubahan sifat fisikokimia ikan tongkol (Euthynnus affinis) akibat perendaman dalam larutan garam (NaCl) 3 persen se- lama dua menit dan lama penyimpanan beku (satu, dua dan ti- ga bulan); serta dipelajari laju penetrasi NaCl ke dalam fillet ikan tongkol akibat perendaman dalam larutan NaCl 3 persen selama dua menit, lama penyimpanan beku (satu, dua dan tiga bulan) dan perendaman dalam larutan NaCl (15, 20 dan 25 persen) selama 10 menit. Hasil pengamatan menunjukkan adanya perubahan sifat fisikokimia ikan selama penyimpanan beku. Kadar SSP (salt soluble protein), WHC (water holding capacity) dan nilai pH. ikan mengalami penurunan. Penurunan kadar SSP dan WHC. terutama terjadi setelah penyimpanan beku ikan satu, dua dan tiga bulan; sedangkan penurunan nilai pH terjadi ter- utama setelah ikan disimpan beku satu dan dua bulan. Kadar air ikan beku setelah dithawing mengalami penurunan yang sangat kecil. Perendaman dalam larutan NaCl 3 persen selama dua me- nit sebelum ikan dibekukan, dapat menghambat penurunan WHC ...
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Judul: Perubahan Struktur Jaringan, Drip loss, dan Profil Asam Amino Filet Ikan Tongkol (Euthynnus affinis) Akibat Penyimpanan Beku
Abstrak: Ikan tongkol (Euthynnus affinis) merupakan komoditas perikanan yang paling banyak jumlahnya di Indonesia. Penyimpanan beku pada filet ikan tongkol dapat menyebabkan kerusakan jaringan daging dan perubahan nilai gizi. Tujuan penelitian ini adalah menentukan perubahan yang terjadi pada jaringan daging ikan, komposisi kimia, nilai drip loss, dan profil asam amino filet ikan tongkol akibat pembekuan. Penyimpanan beku dilakukan pada suhu -20±2 °C selama 2 bulan menggunakan freezer. Pengamatan dilakukan setiap sebulan sekali. Setelah penyimpanan beku 2 bulan, komposisi proksimat berupa kadar abu, lemak, protein, protein larut air (PLA), protein larut garam (PLG) menurun akibat pembekuan kecuali kadar air. Total profil asam amino menurun dari 32.97% menjadi 17.04% dan nilai drip loss meningkat dari 9.00±0.67% menjadi 17.25±0.58% setelah penyimpanan beku 2 bulan. Penyimpanan beku menyebabkan perubahan struktur jaringan daging filet ikan tongkol. Kerusakan terjadi pada miomer yang mulai terlihat jelas pada penyimpanan beku bulan kedua.
Keyword: drip loss, filet, penyimpanan beku

Judul: Development of Face Recognition Model using Bi-2DPCA and Support Vector Machine
Abstrak: The human face is always used in the application of access control systems, identity authentication systems, surveillance systems and security systems. Some researh on face recognition has been proposed with a variety of methods, such as Eigen Faces, Fisher’s Linear Discriminant, Bayesian Networks, Neural Networks,Hidden Markov Model, and so on. But all the above mentioned methods have limitations, such as dealing with the size of the image and lighting and learning time are too long. In a study to obtain an alternative method for face recognition, Le TH and Bui L (2011) conducted research model of face recognition with Two- DimensionalPrincipal Component Analysis (2DPCA) and Support Vector Machine (SVM) using AT&T face image data. The results of these studies that the accuracy of face recognition use 2DPCA and SVM was 97.3% and PCA-SVM was 95.2%. Then in 2010, Bi-2DPCA uses as alternative method of face recognition performed by Yang J et al. (2010). In a study comparing methods of Bi-2DPCA, 2DPCA and PCA. The conclusion that the use of Bi-2DPCA generating and computational accuracy was better than 2DPCA and PCA Based on research conducted by Le TH and Bui L (2011) and Yang J et al. (2010), conducted research for the development of models of face recognition using dimension reduction technique Bi-2DPCA and Support Vector Machine (SVM) as pattern recognition. 1DPCA and 2DPCA dimension reduction technique are used as comparison measure dimensions and computing time than using Bi-2DPCA technique. To help SVM in recognizing human faces, SVM use linear, polynomial and radial basis function (RBF) kernel function. When using RBF kernel, used for the RBF kernel, the parameter for sigma is 2-15 up to 23 and the value of C starting from 2-5 up to 214 which have been used in a study conducted by Le TH and Bui L (2011). Facial image data used are taken from the ORL Face Database AT&T Laboratory, which contain 40 faces, each face with 10 images, and total of image 400 pieces. Validation is done by Leave-One-Out (LOO) cross validation, so that for each pair of extraction and classifier method is 10 trials. One against all method used to help SVM in classifying the ORL face data consists of 40 classes, to reduce the computational time. From the results of tests on 36 models of face recognition , Bi-2DPCA85% with the help of a linear kernel generates the highest level of face recognition accuracy of 94.25 %, and the lowest accuracy rate of 24.50 % was obtained with 1DPCA-kernel polynomial ordo 3 . While the lowest computational time of 15.34 seconds when component is used by 85 % computation time and a maximum of 252.68 seconds when component is 95 %. There are several things that could be concluded that: pattern accuracy on each kernel feature extraction are the same. This means that there is no relationship between the feature extraction used by the kernel to the SVM. The second is, in this study SVM cannot classify large dimension data. From the results of tests on 36 models of face recognition, Bi2DPCA85% with the help
Keyword: Face Recognition, Principle Component Analysis, Kernel, Support Vector Machine, Leave-one Out Cross Validation