Judul: Analisis Jejaring Sosial Bagi Penyuluh Pertanian Dengan Menggunakan Metode R4 Framework
Abstrak: Pemilihan fitur pada jejaring sosial untuk sasaran pengguna yang spesifik memerlukan analisis yang cukup kompleks. Pada penelitian ini, fokus penelitian diarahkan kepada penyuluh pertanian, dengan tujuan untuk mengembangkan jejaring sosial sesuai dengan kriteria kebutuhan penyuluh. Kompleksitas penelitian dibatasi dengan menggunakan metode suatu framework holistik yaitu R4 Framework serta Lean and Mean Methodology. Data yang digunakan berasal dari data online serta offline, data online diperoleh dari berbagai situs jejaring sosial untuk pertanian, sedangkan untuk data offline diperoleh dari wawancara terhadap penyuluh pertanian. Hasil analisis didapatkan sebanyak 15 kelompok fitur, dengan rincian 8 aktivitas sosial dan 7 aktivitas non-sosial. Dari kelompok fitur tersebut kemudian dipilih berdasarkan kebutuhan yang menurut pengguna paling penting, setelah diurutkan didapatkan 6 fitur aktivitas sosial dan 2 fitur aktivitas non-sosial. Kemudian fitur-fitur tersebut dibuat procedural task, hasil analisis menghasilkan 8 task dengan pengefisienan sebanyak 5 task dan 3 task baru dihasilkan dari perbandingan social web yang ada.
Keyword: penyuluh pertanian, jejaring sosial, r4 framework, lean and mean

Judul: Analisis Jejaring Sosial untuk Orang dengan Penyakit Systemic Lupus Erythematosus Menggunakan R4 Framework
Abstrak: Choosing components of a social network for a specific and vague user target is a complex task. This study is focused on analyzing daily life components of people with Systemic Lupus Erythematosus (SLE). The aim of this study is to provide a guideline for developing a social network for people with SLE. This study uses Lean and Mean method complementing with R4 framework as a specific conceptual social web development framework. The guideline which has been made then compared to the popular social network, Facebook, to measure its implementation potential. It summarizes the potential with percentage of 78% for nine privacy and policy set, 33% for three unique user aspects, and 55% for ten objects with its 88 features. To accurate the estimations, the multi-criteria component object are analyzed using the Analytic Hierarchy Process by 9.38% of consistency ratio. It prioritizes the three most important objects needed by people with SLE such as medicine corner by 17.8%, spaces 15%, and medical history 13.7%.
Keyword: Bogor Agricultural University (IPB), systemic lupus erythematosus, social network, r4 framework, analytic hierarchy process

Judul: Enhancement of photon absorbtion on BaxSr1-xTiO3 thin films semiconductor using photonic crystals.
Abstrak: In this research, has been conducted BaxSr1-xTiO3 (BST) thin films manufacturing for mole fraction x = 0.25, 0.35, 0.45, and 0.55; and concentration of 1 molar using chemical solution depositon (CSD) method. The materials, which are used in this research, are barium acetate [Ba(CH3COO)2, 99%], strontium acetate [Sr(CH3COO)2, 99%], titanium isopropoxide [Ti(C12O4H28), 97.999%], gallium trioxide [Ga2O3], 2-methoxyethanol [H3COOCH2CH2OH, 99%] and 1 x 1 cm of transparent conductive oxide (TCO) glass as substrate. Two BST thin films are made that for BST thin films which are doped by 10% galium (BGST) as p-type layer and pure BST solution as n-type. BST solution is made by reacting barium acetate [Ba(CH3COO)2, 99%], strontium acetate [Sr(CH3COO)2, 99%] and titanium isopropoxide [Ti(C12O4H28)] into 2-methoxyethanol solvent [H3COOCH2CH2OH, 99%] in accordance with mass gram for each x value. While, BGST solution is made in the same way as BST solution, plus adding gallium at 10% of the mass of BST. Once all materials are reacted, then vibrated using ultrasonic for 90 minutes, and followed by coating BGST / BST on the TCO substrate. Once the layer is formed, then annealed for 15 hours at temperature of 500 °C with increasing rate of 1.67 oC/minute. Characterizations of BST thin films with or without photonic crystals include the absorbance and transmittance in the visible light spectrum, as well as the electrical photoconductivity characterizations. From BST thin films without photonic crystals indicate that our thin films have light absorption area on almost the entire range of the visible light spectrum even to the infrared range with absorption value over than 67.6%, in addition, it can be seen that the maximum absorbance of BST thin films for all mole fractions lie in blue to green light spectrum region, 457 nm ≤ λ ≤ 570 nm and the minimum in yellow to red light spectrum region, 570 nm ≤ λ ≤ 678 nm. The largest absorbance is found at x = 0.25 with average absorbance value of 92.04% and maximum and minimum absorbance peaks at wavelength of 500.89 and 657.72 nm, respectively. At x = 0.35, average absorbance value decreased to 83.55% with maximum and minimum peaks at 505.73 and 613.68 nm, respectively. Then increased to 91.16% at x = 0.45 with maximum and minimum peaks at 506.04 and 618.56 nm, respectively. At x = 0.55, average absorbance value decreased to 80.12% with maximum and minimum peaks at 507.85 and 608.79 nm, respectively. Moreover, it can be seen that the addition of barium mole fraction leads to wider maximum absorbance or minimum transmittance peaks and narrower minimum absorbance or maximum transmittance peaks in the same range of the green and blue & red light spectrums, respectively. BST thin films with photonic crystals show increasing in absorption for all x values in the range of 3.04 into 13.33%. At x = 0.25, average absorbance percentage increased 3.96% from 92.4 into 95.68%, for x = 0.35 average percentage increased 7.07% into 89.45 from 83.55%. Furthermore, average absorbance of BST thin films at x = 0.45 increased 3.04% from 91.16 into 93.93% and x = 0.55 has
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