Judul: The Study of The Development and The Role of Horticulture Agribusiness On Regional Economy in Karo Regency, North Sumatra Province
Abstrak: Agribusiness is a system consist of up stream, on farm, downstream, and supporting subsystem. The better linkages between agribusiness systems, the greater role of agribusiness system in the regional economy. These linkages result in rotation of added value, thus providing a multiplier effect on the regional economy. The purpose of the study are (1) to describe the development of the agribusiness sub-system of horticulture, (2) to evaluate the condition and completeness of the settlements systems and agribusiness system (3) to evaluate the structure of supply chain in horticulture agribusiness system, and (4) to analyze the role of horticulture agribusiness system in regional economy of Karo Regency. Horticulture sector has a stronger linkage with up-stream sectors than down-stream sector. Horticulture sector has significant Direct Backward Linkage with manufacturing Industry. Although the contribution to the formation of GDP and total output are not significant, but the sector has good role in a multiplier effect. Horticulture processing industry and its supporting infrastructure were not available in Simpang Empat, Tiga Panah and Barus Jahe. The post harvest infrastructure are still limited. The small scale farmers and farmers enterprises did not have power to access them. The lock of post –harvest infrastructure has implied to the low bargaining position of farmers in trade. The tecgnique used in this study were including description of the agribusiness system, infrastructure analysis (scalogram), margin supply chain analysis, and input-output analysis. Up-stream and on farm agribusiness subsystems were developed than downstream subsystem. The development of the up-stream subsystem was identified based on the acces of farmers to obtain the primary inputs of agricultural production. Downstream subsystem have not been developed yet. This was reinforced by the lowest of margin trade which was obtained by farmer, than any other elements in trade.
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Judul: System design of agro-estate for horticulture with integrated regional approach
Abstrak: The effort to fasten the economy growth of developing countries is directed to create an integrated zone that will motivate export, invite investors, and be a catalyst of a continuous, growing and developing region. Empowering of the society as the ultimate goal of development will be achieved through increasing the production of horticulture farm, so that farmer got better income and a real value-added from the agro-industry process. The increase of the horticulture farm production would support agro-industry by supplying raw material in a certain price and timely volume, synchronizing agriculture and agro-industry, increasing value-added, and efficiency of the total process of agriculture development zone.
Keyword: Agro estate, Local specific competitive product, Horticulture, Shallot, Soft System Methodology, Value chain, Tata ruang, Tata guna lahan, Kawasan pertanian terpadu

Judul: Pembuatan Film Tipis Lithium Niobat (LiNbO3) Menggunakan Metode Chemical Solution Deposition (CSD) dengan Variasi Kecepatan Putar (Rpm).
Abstrak: Film tipis merupakan salah satu aspek yang mendapat perhatian sangat besar dalam bidang material, karena film tipis merupakan material menarik yang memiliki sifat optik yang sangat tergantung pada konstanta dielektrik, indeks bias, dan energi gap. Lithium Niobat (LiNbO3 ) dapat digunakan sebagai pelapis pada film tipis karena memiliki sifat piezoelektrik, electrooptical, pyroelectrical dan photorefractive yang sangat baik. Film tipis Lithium Niobat (LiNbO3 ) ditumbuhkan menggunakan metode Chemical Solution Deposition (CSD) dengan variasi kecepatan 3500 rpm, 5000 rpm, 6500 rpm, dan 8000 rpm. Metode ini memiliki keunggulan dapat mengontrol stokiometri film tipis dengan kualitas yang baik, prosedur yang mudah dan membutukan biaya yang relatif murah. Energi band gap yang dihasilkan dari film tipis Lithium Niobat (LiNbO3) berkisar antara rentang 2.1 eV – 2.8 eV dengan indeks bias berada pada rentang 2.18-3.2. Film tipis LiNbO3 memiliki parameter kisi a=b=5.54Ǻ dan c = 16.35 Ǻ. Struktur morfologi film tipis adalah permukaan yang homogen dan ukuran kristal berada pada rentang 0.417 μm – 0.680 μm.
Keyword: film tipis, sifat optik, litium niobat, chemical solution deposition, kecepatan putar