Judul: Simulasi efek disipasi terhadap perambatan pulsa berdurasi orde femtodetik dalam serat optik
Abstrak: ... Efek yang ditimbulkan dari dua suku pertama telah diteliti sebelumnya, dan memperlihatkan terjadinya efek gelombang kejut ke kiri untuk penambahan suku SRS, dan efek gelombang kejut ke kanan untuk penambahan suku SS. Untuk memperlihatkan efek yang ditimbulkan oleh suku TOD dan Disipasi digunakan penyelesaian numerik dengan metode beda hingga Classical Explicit. Hasil yang diperoleh memperlihatkan bahwa suku TOD menyebabkan terjadinya efek dispersi, sedangkan suku disipasi menyebabkan terjadinya efek disipasi. Program dibuat dalam bentuk simulasi sehingga efek masing-masing suku dapat dilihat perubahannya tiap waktu.
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Judul: Studi Perambatan Gelombang Elektromagnetik dalam Kristal Fotonik 2D dengan Defek Menggunakan Metode Finite Difference Frequency Domain (FDFD).
Abstrak: Simulasi numerik dalam dua dimensi kristal fotonik dianalisis dengan menggunakan metode FDFD. Dimana dalam metode ini menggunakan hampiran selisih pusat pada persamaan Maxwell untuk menempatkan medan (listrikmagnet) dan material pada titik diskrit di dalam grid Yee, penurunan matriks gelombang persamaan Maxwell diperlukan untuk kemudian diselesaikan menggunakan persamaan linear  Ax  b untuk menghitung medan listrik-magnet dalam matriks kolom. Digunakan PML sebagai peluruh konduktifitas listrikmagnet untuk melemahkan gelombang datang yang memasuki tepi wilayah komputasi. Kristal fotonik dapat dimisalkan sebagai kisi periodik dari material dielektrik yang menghasilkan fenomena pita terlarang. Hasil didapatkan dari simulasi FDFD dibandingkan dengan literatur dengan sedikit selisih sekitar 0.056. Selisih yang kecil ini dapat ditafsirkan metode ini cukup baik untuk menganalis fenomena pita terlarang. Penyisipan defek dari kristal fotonik akan menghasilkan mode cacat lokal atau photonic pass band (PPB), hasil menunjukan PPB bergantung pada vektor sudut datang, permitivitas dan lebar struktur cacat.
Keyword: FDFD, Kristal Fotonik, Persamaan Linear, PPB, Pita Terlarang

Judul: Kandungan Mineral Kalakai (Stenochlaena Palustris) yang Tumbuh pada Jenis Tanah Berbeda serta Dimasak dengan Cara Berbeda
Abstrak: Kalakai (Stenochlaena palustris) is one of the local vegetables commonly available in the Palangkaraya. Previous research states that kalakai has a relatively high content of nutrients like beta carotene, folic acid, as well as some important minerals. Local communities (Dayak people) in Central Kalimantan and surrounding used to consume kalakai, especially mothers after child-birth.Kalakai has been recognized as an important vegetable to boost milk supplies for mothers who are breast-feeding. Kalakai was unique, because it can grow on various soil types, even on nutrient-poor soil. Therefore, this research aims to determine the effect of different types of soil on the mineral content of kalakai, and influence of processing on the mineral content. The sampling was conducted at five sites with different soil. They are peaty soil, sulphate acid soils, quartz sand soil, and alluvial soil in January and February. All of the samples were given four different treatments, boiling, frying, steaming and fresh (no treatment). Samples were analyzed moisture, ash, and minerals. Analysis of mineral content using Atomic Absorption Spectrophotometer (AAS) Perkin Elmer 1100B. The type of soil affect the content of minerals in the tip of kalakai leaf. It which grown on peaty soil containing a rather high of mineral Mg, Ca, Zn, Mn, which continuously reach to 5160, 6399, 134.6, 158 ppm, while Fe, Cu, and Al with a low successive level of 117.2, 4.5, 20.5 ppm. The pH of peaty soil in this study was 6.08, allegedly still quite a lot of minerals which can be absorbed by plants. Kalakai which grown on acid-suphate soil contains high Fe and Al i.e. 336.4 and 76.4 ppm. The high micro-mineral Al and Fe in acid-sulphate soils due to soil pH is low. Kalakai grown on quartz sand soil containing high minerals Ca, Cu, and Al, namely 6299, 25.1, and 58.1 ppm, respectively, while other minerals such as Mg, Fe, Zn, and Mn were low, it implies in the amount of 4598, 65, 86.8, and 65.9 ppm, respectively. Kalakai grown on alluvial soil is found that the content of Cu quite high, i.e. 7.26 ppm, whereas Fe, Mn, and Al content were low respectively 52, 63.4, and 5.3 ppm. Relatively low mineral content on kalakai of quartz sand and alluvial soil allegedly because of the low element nutrients contained in these soil types. Results of analysis of total mineral or ash content in various ways of cooking show that kalakai has a different total mineral content. Total minerals from the lowest to the highest were kalakai cooked by boiling, frying, steaming and fresh or without treatment of cooking. Cooking process give an effect to mineral content of kalakai. The process of boiling is the highest role in decreasing Mg (21-68%), Cu (11-60%), Ca (39%) and Mn (8- 38%). Other minerals such as Zn and Fe decreased by frying in the amount of 14-37% and 9-43%, respectively. The whole minerals, except Cu, still in the recommended daily intake limit, if assumed that one portion of kalakai is 50 gram dry basis.
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