Judul: Peringkasan Dokumen Bahasa Indonesia Menggunakan Metode K-Means.
Abstrak: Membaca dokumen yang memiliki teks yang sangat panjang merupakan kegiatan yang menghabiskan banyak waktu. Perlu dilakukan peringkasan terhadap dokumen teks yang besar agar meringankan beban pengguna untuk tidak membaca dokumen secara keseluruhan. Penelitian ini mengusulkan untuk pembuatan peringkasan dokumen otomatis menggunakan fitur kata dan metode KMeans. Ringkasan dokumen otomatis dapat digunakan untuk mendapatkan ringkasan teks dengan cepat sehingga memudahkan pengguna untuk mendapatkan informasi utama dari sebuah dokumen. Penelitian ini melakukan peringkasan dokumen dengan menggunakan fitur kata dan metode k-means. Hasil penelitian yang telah dilakukan menghasilkan rata-rata akurasi 58.51%, recall 22.06%, precision 43.84%, dan f-measure 27.88%.
Keyword: fitur kata, k-means, peringkasan dokumen

Judul: Peringkasan dokumen bahasa Indonesia menggunakan metode Maximum Marginal Relevance
Abstrak: Ringkasan dokumen diperlukan untuk memudahkan memahami informasi berukuran besar dengan cepat. Peringkasan dokumen otomatis merupakan solusi untuk mendapatkan ringkasan dokumen dengan cepat. Penelitian ini mengusulkan untuk membuat peringkasan dokumen otomatis menggunakan metode Maximum Marginal Relevance (MMR) dan fitur kata untuk dokumen skripsi. Metode ini menggabungkan relevansi antara kalimat dengan query dan kalimat dengan kalimat yang telah terpilih sebagai ringkasan. Hasil penelitian yang telah dilakukan menghasilkan rata-rata akurasi 60.67%, recall 24.50%, precision 48.46%, dan F-1 30.88%.
Keyword: Maximum Marginal Relevance, MMR, text summarization, word features

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