Judul: Implementasi Algoritme Fonetik untuk Koreksi Ejaan Bahasa Indonesia
Abstrak: A technique to obtain documents containing information in accordance with a user’s requirements is necessary for an information retrieval system. This research compared the performance of four phonetic algorithms: Soundex, Phonix, Metaphone, and Caverphone. This research used a database derived from KBBI 2005. The accuracy of Soundex, Phonix, Metaphone, and Caverphone is 92%, 78%, 77%, and 75%, respectively. However, Soundex and Phonix suggested twice as many words as Metaphone and Caverphone
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Judul: Metode Pencarian dan Temu-Kembali Nama Berdasarkan Kesamaan Fonetik
Abstrak: Sistem temu-kembali informasi membandingkan query pengguna pada dokmnen-dokumen yang disimpan dalam berkas basis data. Beberapa pendekatan pembentukan turunan query telab dikembangkan untuk mengatasi ketidak jelasan akar kata yang akan dicari, salab satunya adalah dengan ukuran kesamaan fonetik. Ada beberapa algoritme dengan menggunakan pendekatan ini, yaitu Soundex dan Phonix yang dikembangkan berdasarkan kesamaan bunyi dalarn bahasa Inggris. Pada penelitian ini akan dibuktikan bahwa algoritme Phonix4 dan PhonixE memiliki kinerja yang lebih baik bila dibandingkan dengan algoritme Phonix8 dan Soundex. Hal ini terjadi karena kesederbanaan algoritme Phonix4 dan PhonixE, dimana kode filtering yang dibentuk tidak terlalu panjang dan penggolongan konsonan yang tidak terlalu sedikit. Akibatnya nilai precision menjadi tinggi, sedangkan tingkat recall-nya rendah. Selain kode yang biasa dipakai pada metode lainnya, PhonixE juga mempunyai kode untuk bunyi akhir sebanyak empat karakter. Tingkat recall yang dapat dipakai pada sistem temu-kembali informasi dengan metode Soundex dan Phonix8 adalab 0.2, sedangkan pada metode Phonix4 dan PhonixE adalah 0.1. AIgoritme Soundex dan Phonix walaupun dikembangkan untuk bahasa Inggris, temyata dapat bekerja dengan baik pada bahasa Indonesia. Hal tersebut karena bahasa Inggris dan Indonesia menggolongkan konsonan-konsonannya dengan keistimewaan-keistimewaan yang sarna.
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Judul: Hybrid solar cells of ZnO nanoparticles/chlorophyll was modified metal ions (Zn2+ and Cu2+ )
Abstrak: Zinc Oxide (ZnO) is a n-type semiconductor with a wide the energy band (Band Gap) is 3.37 eV at room temperature and 3.34 eV at low temperature with a large exiton binding energy is 60 meV. ZnO has been synthesized by hydrothermal method, resulting in a decrease in particle size over the duration of the hydrothermal changes. Crystallographic structure of ZnO were characterized using XRD, has shown the characteristic pattern of a hexagonal wurtzite structure, the crystallite size increases to changes in particle size. Changes in particle size has also led to a change in the absorption peak of ZnO as has been demonstrated posted under test using the optical properties of UV-Vis spectrophotometer. Changes of this uptake has also led to changes in the energy band gap, which increases its band gap energy of the particle size. In electronic applications, especially in solar cells. Chlorophyll is considered less effective, because of their very nature are easily degraded as a result of several reactions which are acid, lighting and temperature. The results of the stability test using a halogen lamp 34 W/m2 for 5 hours, that the substitution of chlorophyll with metal ions Zn2+ and Cu2+ has been shown to form more stable than natural chlorophyll. The characterization of the optical properties, the combination of ZnO / chlorophyll in the form of hybrid films has led to a shift in the absorption region of ZnO becomes more widely from the UV to Visible. ZnO/chlorophyll has absorption range of 350-515 nm, ZnO / Zn-feofitin 332-401 nm and 332-632 nm for Cu-feofitin. The combination of ZnO/chlorophyll and CuSCN as a solid electrolite in hybrid solar cell, a modified chlorophyll with metal ions Zn2+ and Cu2+ has been shown to form a more stable I-V curve. It is characterized by its fill factor value greater than natural chlorophyll. Nevertheless, solar cells with natural chlorophyll has been able to produce higher efficiency values of chlorophyll were substituted.
Keyword: Hydrothermal, ZnO/Chlorophyll modified, Hybrid Solar Cell