Judul: Analisis land rent pemanfaatan lahan tambak di wilayah pesisir kabupaten Serang provinsi Banten
Abstrak: Pond fisheries is an activity whereby coastal land is used as the major of income for Serang Coastal Community. Tirtayasa Zona lies north of Serang Region and is established as the centre for pond fisheries. The major activity there, is the culture of milk fish (Bandeng). This research aim to identify the characteristic of milk fish culture, measure the land rent based on factor of fertility and distance, and to measure the effect of exogenous variabel changes to the land rent. The result shows that Subdistrict Pontang has the highest productivity and either highest production cost, while Subdistrict Tanara has the longest distance from the market. Based on Ricardian land rent concept, Subdistrict Pontang has the highest land rent that is Rp 1.571.237,00 while Subdis trict Tirtayasa assess land rent equal to Rp 1.327.500,00 and Subdistrict Tanara has the lowest land rent, that is Rp 513.000,00. Using multiple regresion analysis, obtained an equation that expressing the correllation between land rent with factor of productivity and distance. The equation shows, that productivity has a positif correllation with land rent, while distance has a negatif corellation with land rent. Result of optimalization analysis from the activity of Milk Fish culture in each subdistrict, shows that activity of Milk Fish culture practiced by farmers in Zona Tirtayasa almost reaching optimal condition. The result of sensitivity analysis , suggests that the increase of oil prices reduces the value of land rent and the magnitude of change in value of land rent is affected by the distance of the pond location from the market.
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Judul: Analisis Nilai Land Rent dan Optimalisasi Pemanfaatan Lahan Tambak Bandeng di Kelurahan Marunda, Jakarta Utara
Abstrak: The purposes of this research were to identified the production of bandeng fishpond activity, estimates the land rent value based from water source, and optimization activity from bandeng fishpond in Kelurahan Marunda. The method used this research were descriptive analysis, land rent value analysis, optimization analysis and sensitivity analysis. The result shows that the input of fishpond bandeng production in every unit is the land, seed, labor, manure, pest control, vitamin, feed, and water use. The land rent value of the fishpond bandeng at BKT water user is Rp 2.093.961,52 per ha. While land rent value at sea water user is Rp 1.039.702,06 per ha. The analysis informs that the unit of analysis of BKT water user has a surplus of land larger than the unit of analysis of sea water users. This illustrates that land use activities from milkfish ponds in the unit of analysis of BKT water users is more efficient aspects of selling power output and fertility of the land. In addition, this study also analyzed the optimization of production inputs to construct the objective function to maximize the value of rents. This is to determine the efficient level of milkfish ponds at Marunda in economically. Optimization and sensitivity analysis results indicate that the use of optimal inputs and rising prices give a positive land value, so that the activity is feasible
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Judul: Perbandingan Algoritma Message Digest 5 (MD5) Dan Secure Hash Algorithm 1 (Shai) Untuk Autentikasi Pesan
Abstrak: Seiring dcngan meningkatnya penggunaan internet sebagai media pertukaran pcsan. metodc pcngamanan pcsan menjadi sangat penting. Nilai suatu pesan yang ingin dijaga keutuhan atnu intcgritasnya menycbabkan pesan tcrscbut hanya baleh dimodifikasi olch pihak yang bcrhak. Namun pada rcalitanya, pesan tersebut akan mendapat ancaman dari scorang penyusup. Bentuk ancaman terjadi apabiJa pcnyusup dcngan suatu cara. dapat mengubah isi pesan terscbut untuk bcrbagai kepcntingan. Apabila isi pesan telah bcrubah dad bentuk aslinya, maka pesan terscbut dikatakan sudah tidak aulcnlik (asli) Iagi. Snatn metodc yang efektif untuk mcnguji kcautentikan suatll pesan digllnakan tcknik kriptografi. Pada kal)'a ilmiah ini akan dibahas algoritma Message Digest 5 (MDS) dan Secure !-lash Algorithm (SHAI) untuk autentikasi pesan.
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