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: Alokasi Optimal Pemanfaatan dan Nilai Land Rent Sumberdaya Tambak di Kecamatan Tanah Merah Kabupaten Indragiri Hilir Provinsi Riau
Abstrak: The aims of this research are to analyse the optimal allocation rate of resources utilization of pond culture, to estimate and to analyse land rent value of prawn pond culture and to estimate affect of change in exogeneous variable on the land rent value. Finding of the research shows that economic value of prawn pond culture of 92 ha in Tanjung Pasir Village, is estimated to be Rp163.862.746,11 per year and a total of 76 ha in Tanjung Baru Village is Rp6.191.627,23 per year. Based on Ricardian land rent concept, Tanjung Baru Village has land rent value of Rp1.560.182,00 per ha, while Tanjung Pasir Village has about Rp1.065.431,00 per ha. Multiple regression model, applied for this research indicates that there is a corelation between land rent value and productivity factors and distance. The model has also shows that factor productivity has a positive correlation to the land rent value, while distance has a negative correlation to the land rent value. It is also indicated that Tanjung Baru Village has reached almost an optimal condition. The finding of sentivity analysis shows that the increase of oil price and urea fertilize reduced the value of land rent and the magnitude of change in the value of land rent be affected by the factor of fertility rate and the distance of the pond location from the existing local spot market.
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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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