Judul: Uji aktivitas antibakteri simplisia daun mikania (Mikania micrantha) terhadap Salmonella, Escherichia coli, dan Staphylococcus aureus
Abstrak: Mikania micrantha atau yang dikenal juga dengan nama mikania adalah suatu tumbuhan yang tumbuh merambat dengan cepat. Di Tapanuli Selatan, Sumatera Utara, tumbuhan ini digunakan untuk mengobati luka pendarahan pada kulit. Di Kuantan Singingi, Riau, tumbuhan ini digunakan untuk menangani ulser, abses, skabies, dan penyakit kulit lainnya. Tujuan penelitian ini adalah untuk menguji aktivitas antibakteri simplisia daun mikania (Mikania micrantha) terhadap Salmonella, E. coli, dan S. aureus. Metode uji yang digunakan dalam penelitian ini adalah metode difusi agar dan metode sumur. Ada 5 jenis larutan simplisia daun mikania yang dibedakan berdasarkan tingkat konsentrasinya, yaitu 25%, 12,50%, 6,25%, 3,12%, dan 1,56%. Uji aktivitas antibakteri yang menggunakan metode difusi cakram dan metode sumur menunjukkan bahwa simplisia daun mikania tidak dapat menghambat pertumbuhan Salmonella dan E. coli, namun dapat menghambat pertumbuhan S. aureus. Hasil pengujian aktivitas antibakteri menunjukkan bahwa larutan simplisia daun mikania yang paling efektif menghambat pertumbuhan S. aureus adalah pada konsentrasi 25%.
Keyword: Bogor Agricultural University, Institut Pertanian Bogor, IPB, Antibacterial activity test, Escherichia coli, Mikania micrantha, Salmonella, Staphylococcus aureus

Judul: Efektivitas Antimikroba Ekstrak Daun Sembung Rambat (Mikania micrantha H.B.K.) terhadap Bakteri Gram Positif yang Resisten Penisilin
Abstrak: The used of antibiotic which is uncontroled has lead to the emergence of resistant bacteria, such as penicillin-resistant bacteria. Therefore, many research in finding new antimicrobial drugs are barely needed to be conducted. One of the potential herbs is Mikania micrantha known as sembung rambat in Indonesia, an invasive alien species. The aim of this research was to showed effectivity of crude ethanolic extract of Mikania micrantha leaveas in inhibiting the growth of penicillin G resistent positive Gram bacteria. The crude ethanolic extract of Mikania micrantha leaves was tested penicillin G-resistant positive-Gram bacteria. The method used for in vitro effectivity test in this research was well diffusion agar method in various concentrations. The results obtained that crude ethanolic extract of Mikania micrantha leaveas showed effectivity in inhibiting the growth of penicillin G resistent positive Gram bacteria and the effective concentration is 80% (g / ml).
Keyword: penicillin-resistant bacteria, Bogor Agricultural University (IPB), Mikania micrantha, Antimicrobial

Judul: Graphology Analysis Based on Letter a and t Using Perceptron.
Abstrak: Graphology or handwriting analysis is a method of identifying, analyzing, evaluating, and understanding personality through the strokes and patterns revealed by handwriting. A person who can analyze handwriting is called a graphologist. A graphologists can be subjective in their assesments different graphologist can have different analysis of the same handwriting. Therefore, a computer technology may help to minimize the subjectivity. This research used perceptron to analyze personality based on handwriting. Perceptron is one method of neural network. This research analyze two letters to letter a and t image. Letter a are represented by 135 images, consisting of 81 images as training data and 54 images as testing data. There are 150 images used for t images, consisting of 90 images as training data and 60 images as testing data.There are 5 experiments consisting of 2 experiments for letter a and 3 experiments for letter t. The result is the character of each class letter a and t where each parameters there are 3 classes. The accuracy of letter t and letter a was 55% and 88.89% respectively.
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