Judul: Estimasi Kerugian Ekonomi Pembudidaya KJA dan Strategi Pengelolaan Akibat Pencemaran Air di Danau Maninjau Kabupaten Agam
Abstrak: Kerusakan sumberdaya air pada Danau Maninjau membuat masyarakat sekitar danau rugi dan beralih matapencaharian. Kajian ini bertujuan untuk (1) Mengidentifikasi persepsi rumah tangga pembudidaya KJA terhadap pemanfaatan sumberdaya air Danau Maninjau; (2) Mengestimasi kerugian ekonomi yang dirasakan oleh rumah tangga pembudidaya KJA; (3) Merekomendasikan strategi pengelolaan Danau Maninjau agar berkelanjutan. Penelitian ini menggunakan metode Skala Likert, Loss of Income, Replacement Cost, Loss of Productivity, dan Multicriteria Policy (Multipol). Hasil penelitian ini yaitu (1) Rumah tangga pembudidaya KJA memiliki persepsi yang netral atau ragu – ragu terhadap pemanfaatan sumberdaya air Danau Maninjau; (2) Total nilai kerugian ekonomi pembudidaya KJA sebesar Rp. 95.579.522.540 per tahun; (3) Strategi pengelolaan yang optimal untuk Danau Maninjau antara lain, kebijakan kelestarian dapat diimplementasikan melalui program produk, diklat, dan rule untuk skenario berbasis pemerintah. Program monitoring dapat diimplementasikan pada kebijakan revitalisasi, multifungsi, dan wisata budaya. Kebijakan revitalisasi strategi untuk skenario berbasis pemerintah, sementara kebijakan multifungsi dan kebijakan wisata budaya merupakan strategi untuk skenario berbasis pemerintah dan masyarakat. Program zonasi wilayah, peningkatan infrastruktur, teamwork, dan clearing dapat diimplementasikan pada kebijakan produksi ikan berkelanjutan untuk skenario berbasis pemerintah dan masyarakat., Damage of water resource at Maninjau Lake have been making the communities around lake losses and switch them livelihoods. The aims of this study are (1) Identify the perception of floating net cages (KJA) fish farmers on the use of water resource in Maninjau Lake; (2) Estimate of Economic Loss by floating net cages (KJA) fish farmers; (3) Recommendation management strategy for sustainability in Maninjau Lake. To answer this study, the methods used are Likert Scale Analysis, Loss of Income, Replacement Cost, Loss of Productivity, and Multicriteria Policy (MULTIPOL). The results of this study are (1) Floating net cages (KJA) fish farmers have a neutral or hesitant perception on the use of water resource in Maninjau Lake; (2) Economic loss estimation of floating net cages (KJA) Cultivator is IDR 95.579.522.540/year; (3) The optimal management strategy for Maninjau Lake are preservation policy can implemented by product, training, and rule action for government’s scenario. Monitoring action can implemented by revitalization, multifunction, and agriculture tour policy’s. Revitalization policy for government’s scenario, while multifunction policy and agriculture tour policy for government collaboration society scenario. Zoning region, infrastructure raising, teamwork, and clearing can implemented by fish production’s sustainability policy, and this policy for government collaboration society scenario.
Keyword: economic loss, floating net cages, maninjau lake, Multipol, polution

Judul: Economic assessment and management policy of lake resources sustainability (Case study in Maninjau Lake of West Sumatera)
Abstrak: Maninjau Lake that lays in the Tanjung Raya district, Agam Regency, West Sumatra Province, has potential in nature resources and environment that can be used for supporting the economic in this regency. The economic function i.e as water sources for irrigation, fisheries ( Catch and mariculture), Local or international tourism, domestic needs, and as an electrics generator that produce energy 205 MW annualy. The objectives of this research are : (1) Knowing total economics value of Maninjau Lake utility, (2) Knowing perception of society around the lake on Maninjau lake utility, (3) Formulating policy to preserve Nature resoure functions that be conected to Maninjau Lake utility. This research shown Total Economic Value of Maninjau Lake amount Rp 350,921,949,238, This value consist direct use value (DUV) Rp. 339,527,739,838,-, indirect use value (IUV) Rp 5,121,289,600,-, option value (OV) Rp 3,237,103,800 and non use value (NUV) Rp. 3,035,816,000,-. The result of Analysis public perception about the existence of the Maninjau lake varies greatly. This variation relate to the characteristics of the communities. Characteristics of the communities that have a significant relationship with the perception, namely: age, educational level, and type of the work. Bureau of Maninjau Lake Territory Management (BPKDM), Nagari Government and Central Government as the key variable that influenced another lower level institution in the hierarchy below. Sub elements that have high moving power to the successful management of natural resources and environment of Maninjau lake are understanding values about the lake to the public society, biodiversity maintenance, maintenance of hydrological and ecological functions, and maintaining Environmental Hygiene. Strong driving for the successful management program of Maninjau Lake are increasing knowledge and awarness public about the Lake, expanding alternative economic opportunity and increasing income of society around the Maninjau lake, increasing participation of society on the management of lake and making good management strategy for a fishery with society and empowerman organizational management of the lake. The ultimate obstacle are the low understanding about the values of the lake as the God creation that needs conservation sustainability, less coordinations among instantional on the management maninjau lake, The low active of public role in conserving the lake,yet of collective willingness on lake maintaining, unclear about responsibility of lake property, and not active monitoring of changes about lake water quality.
Keyword: Economic assessment, total economic value, management policy, Danau Maninjau, Sumatera Barat

Judul: Photosensor producing based on ferroelectric material of Ba0,5Sr0,5TiO3 doped by Ferrium Oxide (Fe2O3) on a P-Type Silicon Substate Si (100) applied as a digital camera with a single pixel image sensor
Abstrak: Thin film Ba0,5Sr0,5TiO3 (BST) doped with Fe2O3 was grown on p-type silicon substrate (100) using chemical solution deposition (CSD). It used the solvent 2-methoxyethanol with annealing temperature of 850°C and the doping treatment Fe2O3 of 2.5, 5, 7.5, 10 % of the mass formed BST. Pure BST had the highest absorption of 600 nm of light wavelength. Additions Fe2O3 moves highest absorption in the range of 560 nm. Fe2O3 addition was strengthening thin film sensitivity to the effects of light. In general, doping Fe2O3 10% was result the best absorbance and current-voltage of BST thin film. Electrical properties of thin films BST include dielectric, photoconductivity, and dissipation energy. Based on the current-voltage (I-V) analysis, pure BST and doped BST showed photodiode properties. Dielectric values obtained in the range from 23.32 to 243. Based on electrical conductivity data and energy dissipation, BST thin films have shown photodiode characteristics and are therefore suitable as light sensors. The image sensor in a digital camera is also a light sensor. This BST thin film has been scientifically proven to be a light sensor and also it can be applied as an image sensor. This is a novelty image sensor based on thin film Ba0.5Sr0.5TiO3.
Keyword: barium strontium titanate, thin film, photodiode, image sensor, digital camera