Judul: Identifikasi Plat Nomor Dengan Principal Component Analysis Menggunakan Metode Jaringan Syaraf Tiruan Propagasi Balik
Abstrak: Along with the very development of digital image processing technologies makes identification of motor vehicle plate image into one of the computer techniques which is often developed. Referring to the previous research done by Lesmana (2012), the research used the image centroid and zone (ICZ) to recognize vehicle plates that canreduce plates into the average with 82.50%. Data plate which is used in this research is plates on motor vehicles in Baranangsiang IPB taken by amobile phone camera with a resolution 5 megapixel (MP). In this research, the best accuracy is 40.99% smaller than the previous research. It can be concluded that the reduction by Principal Component Analysis (PCA) is not very good for image processing on vehicle number plates.
Keyword: Bogor Agricultural University (IPB), Number Plate, Backpropagation, Neural Network

Judul: Identifikasi Karakter Plat nomor Kendaraan Menggunakan Ekstraksi Fitur ICZ dan ZCZ Dengan Metode Klasifikasi K-NN
Abstrak: Plat nomor merupakan kode unik yang terdiri dari susunan huruf dan nomor. Setiap kendaraan memiliki satu plat nomor yang dijadikan sebagai kode identitas dari kendaraan itu sendiri. Karena plat nomor bersifat unik sehingga sering digunakan untuk keperluan pencatatan seperti di area parkir. Untuk memudahkan pencatatan plat maka dibuatlah identifikasi karakter plat nomor kendaraan secara otomatis yang menggunakan input berupa gambar plat nomor. Klasifikasi K-NN dan ekstraksi ciri ICZ dan ZCZ digunakan dalam identifikasi karakter. Ekstraksi ciri ICZ dan ZCZ mendapatkan ciri dengan menghitung koordinat centroid dan membagi citra ke dalam n zona yang sama besar kemudian menghitung rata-rata jarak centroid terhadap keseluruhan piksel. Akurasi identifikasi per karakter yang dihasilkan dengan menggunakan zona berjumlah 14 dan ektraksi ciri ICZ adalah 97.00% sedangkan akurasi dengan menggunakan ektraksi ciri ICZ+ZCZ adalah 98.17%. Akurasi indentifikasi per plat nomor kendaraan menggunakan ekstraksi ciri ICZ+ZCZ tanpa toleransi kesalahan adalah72.31% dan 89.23% untuk toleransi kesalahan sebanyak 1
Keyword: Bogor Agricultural University, Institut Pertanian Bogor, IPB

Judul: Mercury Toxicity and It’s Effect on Histopathology Change of Nile Tilapia (Oreochromis niloticus).
Abstrak: Nile tilapia (Oreochromis niloticus) is one of fish species that oportunity to contaminated with mercury. The effects of pollutants can damage living organisms organs and can cause death. The effects caused mercury had acute or chronic character. The aims of this study are to determine threshold and acute toxicity of mercury chloride (HgCl2) of Nile tilapia (Oreochromis niloticus), to assess the effect of mercury chloride (HgCl2) on several biometric parameters (survival, growth rate of average daily weighted, liver condition, bile and reproductive variability of Nile tilapia (Oreochromis niloticus), assess the level of damage to the histological structure of the gills, liver and kidney of Nile tilapia (Oreochromis niloticus) caused mercury chloride (HgCl2) exposure. This study was conducted from February to June 2013. Nile Tilapia (Oreochromis niloticus) were used in this study were female with average weight 20 grams or 11-13 cm length range. Toxicant materials used in this study was mercury chloride (HgCl2). Fish were reared in each aquarium 60x40x30 containing 48 liters of water. This study consists of three stages: a preliminary test, acute test, and sub-chronic test. To determine the changes in biometric condition of tilapia approximated by measuring the survival rate (SR), the growth rate of average daily weight , the content of mercury in the fish organs, hepatosomatic index (HSI), the relative bile volume (VER), gonadal soamtic index (IKG), fecundity and oocit diameter, tissue damage caused by mercury in fish organs by making histological preparations stained with hematoxylin and eosin. The median lethal concentration (96 hr, LC50) of Mercury Chloride was calculated as 1,64 mgL--1.The survival rate was highest in the control treatment (46,67 %) . Mercury chloride with concentration 0.196 mgL--1 show significant effect to changes HSI and relative bile volume, and oocyte diameter of Nile tilapia (p < 0,05). Mercury chloride with a concentration of 0,164 mgL-1 and 0,196 mgL-1 have not a significant effect on the growth rate of weight, gonadal somatic index and fecundity of Nile tilapia (p > 0,05). Mercury chloride cause damage to gills (hyperplasia, hypertrophy, proliferation and neukrosis), liver (hyperplasia, hemorhage, shrinkage of hepatocytes, proliferation and neukrosis) and kidney (hyperplasia, hemorrhage, shrinkage of the glomerulus, proliferation and neukrosis).
Keyword: Nile tilapia, Hepatosomatic indexs (HSI), histopathology