Judul: Pendeteksian Kata dengan MFCC sebagai Ekstraksi Ciri dan Codebook sebagai Pengenalan Pola
Abstrak: Word detection is the process of identifying words spoken by someone. It is useful for communication between computers and humans. MFCC technique was used to extract features from voice signal and compare it to the sound signal in the database. Codebook is the process of producing small characteristic vectors was used to match unknown words to words in the database. The purpose of this research was to quantify detection accuracy of spoken words and compare 16 codewords and 32 codewords. The experiment produced an average detection accuracy of 98%. We conclude that detection using MFCC and codebook can achieve good performance. And the performance of the 16 codewords is better than 32 codewords for word detection.
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Judul: Identifikasi Pembicara dengan MFCC sebagai Ekstraksi Ciri dan Codebook untuk Pengenalan Pola
Abstrak: Setiap orang mempunyai karakteristik suara yang berbeda-beda. Penelitian ini mengembangkan pembicara sistem yang menggunakan suara manusia sebagai fiturnya. Model ini menggunakan metode yang bergantung pada teks. Pembicara identifikasi memiliki masalah kompleks yang disebabkan oleh frasa yang salah diucapkan atau salah dibaca, mikrofon yang berbeda penempatan, gangguan latar belakang, ketidaksesuaian saluran, keadaan emosi ekstrem, penyakit, penuaan, mimikri oleh manusia dan tape recorder. Langkah pertama untuk mengembangkan sistem pengenalan pembicara adalah mengumpulkan data suara dari 10 pembicara (5 wanita dan 5 pria). Selanjutnya data suara diolah melalui proses standarisasi, diam penghapusan, penghilangan noise, ekstraksi fitur MFCC, pemodelan dan penggunaan pengenalan pola Buku Kode. Penelitian ini menghasilkan akurasi lebih dari 95% pada data suara asli. Akurasi terbaik diperoleh pada data latih : data uji proporsi 60% : 40% dengan nilai 97,92%. Untuk data dengan tambahan Noise 20dB dan noise 15dB masing-masing menghasilkan nilai akurasi sebesar 36,53% dan 24,72%. Menambahkan Kebisingan proses canceling (NC) sebelum ekstraksi fitur pada pengujian data menghasilkan penurunan sebesar 1,25% akurasi pada data asli, peningkatan akurasi data sebesar 10,28% dengan tambahan noise sebesar 20dB dan peningkatan akurasi data sebesar 16,25% dengan tambahan noise sebesar 15dB. Untuk penelitian lebih lanjut, seseorang dapat mencoba berbagai nilai untuk masukan NC dan MFCC atau mencari nilai lain. metode terkait untuk menangani masalah gangguan.
Keyword: Speaker identification, MFCC, Noise canceling, K-Means clustering, Codebook

Judul: In vitro propagation and micro bulb induction of shallot
Abstrak: Shallot growers use harvested bulbs as propagules for the next planting. The use of the bulbs may cause degenerative diseases. Therefore, propagation system of shallot must be sought. A series of experiments were conducted in the Department of Agronomy and Horticulture IPB and the University of Queensland from May 2007 to July 2011. The first objective in this experiment was to determine the effect of explant storage duration on in vitro shoot multiplication of shallot. The experimental results showed storage length affected the growth of culture. Twomonth stored bulbs gave the best results on the number of micro shoots, number of leaves and roots and less vitrification. Four-week-old shoots were the best used for micro-propagules in shallot micro bulb induction. The objective of the second experiment was to determine the effect of temperature on the formation of shallot micro bulbs. It was shown that room temperature influenced the number of micro bulb, bulb base diameter, the widest diameter, ratio of the widest diameter and the base diameter of shallot micro bulb (Dt / Dp), root length, shoot length, number of leaves, number of senescing leaf. Temperature of 30/27 °C was better than 20/17 oC in accelerating the process of micro-bulb formation and increased the size of shallot micro bulbs. The objective of the third experiment was to determine the effect of sucrose and paclobutrazol on micro bulb induction. No interaction between sucrose and paclobutrazol was shown. Sucrose affected plant height, number of senescing leaf, root number, root length, the weight of plantlets and micro bulb widest diameter. Sucrose concentration of 90 g L-1 was the best in inducing shallot micro bulbs. Paclobutrazol significantly affected plant height, number of senescing leaf, number and length of roots. Paclobutrazol at level 10 mg L-1 inhibited plant height, leaf number and root length. Paclobutrazol 0.1-10 mg L-1 shortened root length. Paclobutrazol at concentration of 1 and 10 mg L-1 produced an abnormal form of micro bulb. The objective of the fourth experiment was to determine the success of shallot shoot and micro bulb acclimatization. At this stage of acclimatization, micro bulbs could be successfully grown for 3 weeks after acclimatization. Micro bulb was better in acclimatization than rooted plantlet. Plants may be transplanted to the field at 2 weeks after acclimatization. It is concluded that bulb stored for two months was the best for shoot multiplication. Media MS+vit B5 and 90 g L-1 sucrose at 30 oC was the best for bulb induction. Paclobutrazol should not be used for bulb induction. Bulb was better acclimatized than planlet. The media for acclimatization was green leaf compost and husk charcoal.
Keyword: Allium ascalonicum L, micro bulb, explant age, room temperature, paclobutrazol