Judul: Penerapan SOM untuk Pengenalan Nada pada Angklung Modern
Abstrak: Angklung is an Indonesian cultural heritage from West Java and has been developed following the development of modern music. The purpose of this research is to recognize the tone of angklung by using self-organizing maps (SOM) and mel-frequency cepstrum coefficients (MFCC) feature extraction. The used data were 300 tones of angklung that were played by staccato of 12 diatonic tones, each tone by 25 voices. Tones data were recorded for 3 seconds with some staccato in play. The initial process was making the data into one staccato tone, normalized, and then its characteristics were extracted with 26 cepstral coefficients MFCC. Distribution of training and test data was conducted randomly by the composition of 19 training data and 5 test data for each tone. This research conducted three repetitions on radius 0, 1, and 2 with training data, test data and learning rate of 10 parameter values at different SOM in each of their repetition. The result shows that the best accuracy obtained was 98.33% at a radius of 1 in repetition 1 and 3, as well as at a radius of 2 in repetition 1 with a common learning rate in both radius, 0.0090
Keyword: SOM, MFCC, diatonic tones, clustering, angklung

Judul: Application of LVQ using K-means initializations for guitar tone chord recognition with MFCC feature extraction
Abstrak: Manusia dapat mengenali suara melalui proses yang dilakukan secara berulang-ulang. Namun, tidak banyak orang yang mampu mengenali suara chord gitar. Penelitian ini bertujuan untuk membuat suatu sistem pengenalan chord gitar menggunakan metode LVQ sebagai pengenalan pola dan MFCC sebagai ekstraksi ciri. Bobot awal yang digunakan pada metode LVQ diperoleh dengan menginisialisasi K-means. Data yang digunakan sebanyak 8640 data suara gitar dengan 24 jumlah chord. Masing-masing data terdiri atas 2 chord yang akan diuji secara terpisah. Parameter LVQ yang digunakan adalah learning rate 0.002, epoh 100, dan penurunan learning rate 0.9. Parameter yang digunakan dalam proses MFCC adalah time frame, overlap, jumlah koefisien cepstral dan jumlah cluster. Hasil percobaan menunjukkan bahwa akurasi maksimum yang diperoleh adalah 83.65% pada time frame 30 ms, overlap 0.4, koefisien cepstral 26, dan jumlah cluster 100., Humans can recognize the sound through a process that is done repeatedly. However, not many people are able to identify the sound of guitar chords. This study used LVQ as pattern recognition and MFCC as feature extraction. Initial weights were initialited by K-means clustering. A collection of 8640 sound data were used with 24 guitar chords. Each data consist of two chords that were tested separately. The parameters used in the process LVQ were 0.002 learning rate, 100 epoch, and 0.9 learning rate decrease. The parameters used in the process of MFCC were the time frame, overlap, the number of cepstral coefficient and the number of clusters. The experimental results showed that the maximum accuracy of 83.65% was obtained with 30 ms time frame, 0.4 overlap, 26 cepstral coefficients, and 100 clusters.
Keyword: chord gitar, Learning Vector Quantization (LVQ), Mel Frequency Cepstral Coefficients (MFCC)

Judul: Penyakit transmissible gastroenteritas oleh virus corona pada babi
Abstrak: Trasnmissible Gastroenteritis pada babi oleh virus merupakan penyakit infeksius yang ditemukan pertama kali oleh Doyle dan Hutchings tahun 1946 di Indiana USA. Sehubungan dengan tingginya mortalitas akibat pe- nyakit TGE pada anak-anak babi serta kerugian yang beru- pa penurunan berat badan secara drastis pada babi yang dewasa, maka perlu kiranya penyakit ini diperhitungkan bagi suatu usaha peternakan. Walaupun di Indonesia be- lum dilaporkan kejadian penyakit tersebut, tetapi kita perlu waspada terhadap kemungkinan masuknya penyakit bersama dengan babi-babi import yang banyak dijumpai di- peternakan besar di Indonesia. ...
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