Judul: Analisis Saluran dan Marjin Pemasaran Ikan Koi di Kecamatan Cisaat, Kabupaten Sukabumi
Abstrak: Kecamatan Cisaat memiliki potensi alam cukup baik memproduksi ikan koi. Namun, belum dioptimalkan sehingga produksi grade unggul (A dan B) masih rendah. Perbedaan harga jual sesuai grade menimbulkan dugaan adanya gap antara pembudidaya dan konsumen akhir sehingga perolehan keuntungan dalam sistem pemasaran ikan koi tidak setara. Penelitian ini bertujuan: 1) Menganalisis lembaga, fungsi dan saluran pemasaran yang terjadi dalam sistem pemasaran ikan koi dan mengestimasi nilai marjin pemasaran, farmer’s share dan net B/C, 2) Mengkaji efisiensi pemasaran. Analisis kualitatif untuk mengetahui fungsi dan sistem pemasaran ikan koi, kuantitatif untuk menghitung marjin pemasaran, farmer’s share dan net B/C. Hasil menunjukkan, empat lembaga pemasaran terlibat, setiap lembaga melakukan ketiga fungsi pemasaran dengan aktivitas berbeda-beda serta terdapat enam saluran pemasaran. Marjin pemasaran terbesar grade A dan B pada saluran V, farmer’s share terbesar diperoleh saluran VI, nilai net B/C terbesar pada saluran V. Saluran pemasaran paling efisien adalah saluran VI karena memenuhi seluruh indikator efisiensi pemasaran.
Keyword: farmer’s share, ikan koi, Kecamatan Cisaat, marjin pemasaran, saluran pemasaran.

Judul: Analisis Saluran Pemasaran Ikan Koi di Kecamatan Cisaat, Kabupaten Sukabumi, Jawa Barat
Abstrak: Berkembangnya permintaan masyarakat akan Ikan Koi, berkembang pula budidaya Ikan Koi. Petani ikan di Kecamatan Cisaat juga mulai membudidayakan Ikan Koi selain membudidayakan ikan konsumsi seperti Ikan Ni!a dan Ikan Mas. Petani Ikan Koi juga merupakan petani Ikan Nila, sehingga petani membudidayakan dua jenis ikan yang memberikan keuntungan yang berbeda. Ikan Koi yang dihasilkan oleh petani agar sampai kepada tang an konsumen membutuhkan lel11baga pel11asaran yang akan mel11bentuk suatu saluran pel11asaran Ikan Koi.
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Judul: Model’s Dynamics for Lymphocytes Recovery on the HIV presence with Protease Inhibitor Therapy.
Abstrak: HIV is a member of retrovirus that especially attacks lymphocytes or white blood cells, known as CD4+ T cells. New T cells created from sources within the body such as the thymus and by proliferation of existing T cells. In this paper, influence of protease inhibitor therapy in HIV dynamics will be analyzed. The influence can be categoried in three models, which are model HIV without drug therapy, model HIV with protease inhibitor and model T cell recovery. In the models, three parameters which are uninfected cells population, infected cells population and virus population are studied. From HIV without drug therapy model it is obtained two types fixed point which are uninfected fixed point and infected fixed point. The stability of fixed point depends on basic reproduction number which is influenceed by the total number of virus produced by a cell during its lifetime. From HIV with protease inhibitor therapy model it is obtained two type fixed points. The stability of fixed point depends on basic reproduction number. Other than influenceed by the total number of virus produced by a cell during its lifetime, basic reproduction number of this model also affected by the effectiveness of a protease inhibitor. Basic reproduction number of this model is smaller than that of model HIV without drug therapy. In the model T cell recovery, new T cells created only from sources within the body, and T cells can be invulnerable to HIV infection after the therapy. From the model it is obtained only one fixed point that is uninfected fixed point. The stability of fixed point depends on basic reproduction number. The total number of virus produced by a cell during its lifetime and the effectiveness of a protease inhibitor determine the basic reproduction number. Basic reproduction number of this model is smallest than that of other models.
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