Judul: Studi Pemilihan Jenis Tanaman Pada Kebun-Talun Di Desa Muaraclkadu dan Desa Sirnagalih, Kecamatan Sindangbarang, Kabupaten Cianjur
Abstrak: Pemilihan jenis tanaman dalam sistem pengelolaan kebun-talun merupakan pengambilan keputusan untuk menentukan jenis tanaman yang akan dibudidayakan oleh petani. Kegiatan ini biasanya dilakukan pada awal pengelolaan kebun-talun dan dipengaruhi oleh berbagai aspek yang melekat pada pilihan jenis tanaman. Penelitian ini bertujuan untuk menguraikan pengambilan keputusan yang dilakukan oleh petani kebun-talun, mengapa petani memilih suatu jenis tanaman tertentu dan bukan jenis tanaman yang lain. Penelitian dilaksanakan pada bulan Februari-Maret dan Juni 2004 dengan mengambil tempat di Desa Muaracikadu dan Desa Sirnagalih, Kecamatan Sindangbarang, Kabupaten Cianjur, Provinsi Jawa Barat. Pemilihan lokasi penelitian dilakukan secara sengaja (purposive) dengan pertimbangan di kedua desa ini telah terbentuk sistem pengelolaan kebun-talun yang berlangsung secara turun-temurun.
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Judul: Kajian Pengambilan Keputusan Pemilihan Jenis Pohon dalam Pengelolaan Hutan Rakyat (Kasus di Desa Bojonggedang, Kecamatan Rancah, Kabupaten Ciamis)
Abstrak: The development and management of community forests in fact now is facing some problems. One of them is related to the selection of seed. The seeds that farmers can get, have modest quality. On the other hand, the choice of good quality tree is determined by the quality of the good seed. In addition to seed selection in community forest management, we should also consider how the farmers run their community forests, therefore this study aims are: 1) to explain the conditions of community forest management at the study site, and 2) to describe the considerations of the tree species which planted by farmers. This study takes place at Bojonggedang Village, Rancah Sub District, Ciamis Regency. The method for selecting respondents is purposive sampling method, with total respondents are 30 peoples. The results of this study indicate that the process of forest management by farmers are: 1) preparation of land, 2) planting, and 3) maintenance with undetermined frequency. Farmers are not doing harvesting activities by themself, they submitted on middlemen for both logging and timber transportation. Processing of forest products by farmers only for personal consumption, not for sale. Economic consideration is a primary consideration in determining the type of tree seed that will be planted. It can be seen from the factor type of seed that produce faster; easier access to markets; and the stability of the selling price of these types.
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Judul: The Dynamic of HIV Virus Infection as a Result of Protease Inhibitor Therapy.
Abstrak: Acquired immunodeficiency syndrome (AIDS) is defined as symptoms of deterioration human immune system caused by human immunodeficiency virus (HIV). The virus damages the leucocytes; therefore, once a person infected by the HIV, his/her immune system will be paralyzed and eventually will not be able to survive from any disease. HIV is transmitted in many ways, such as having unsafe sex, using unsterilized syringe, blood transfusion, and many more. So far, there has not been discovered yet a way or a medicine that can totally cure this disease. However, reverse transcriptase inhibitor therapy, protease inhibitor, or combination of those two can decline the growth of virus inside the body of the infected person. Therefore, the immune system will be enhanced back to normal phase. In this paper, will analyze the effect of protease inhibitor therapy on the dynamics of virus inside the blood with different value of effectiveness. There are two mathematical models of protease inhibitor therapy to consider, i.e. perfect and imperfect protease inhibitor. The perfect protease inhibitor therapy hinders the virus to grow well and not to infect healthy leucocytes. On the other hand, the imperfect one cannot completely detained the virus growth.
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