Judul: Penggerombolan Dua Tahap Ikan Tembang (Sardinella fimbriata) di Perairan Teluk Banten
Abstrak: Sardinella fimbriata as known as Ikan Tembang is the common resources of PPN Karangantu, Banten. Ikan Tembang become prior target catches by Karangantu’s fishermen because of the high demand. Sampling in May to August 2012 had been done to evaluate morphological characteristics of fish. This study aims to clustering Ikan Tembang in Teluk Banten using two step cluster method and identifying the morphological characteristics in that clusters. Identifying the character of fish is used to know the right fish to catch without examining the development of gonad maturity. The morphological characteristics of Ikan Tembang are measured by categorical and continuous scale. The number of observation is 760. There are three optimum clusters which clustered by length, weight and gonad maturity (TKG) of Ikan Tembang. The right fish to catch based on TKG is the thrid cluster, the ready to spawn phase and already to spawn phase. Third cluster marked by 150.35 mm avarage length and 42.72 grams avarage weight. There are 70% overfishing samples that clustered in first cluster and second cluster.
Keyword: mixed measurement scales, two step cluster.

Judul: Kajian Stok Sumberdaya Ikan Tembang (Sardinella fimbriata Valenciennes, 1847) di Perairan Teluk Banten yang Didaratkan di PPN Karangantu, Banten
Abstrak: Sardinella fimbriata atau fringescale sardine atau ikan tembang menjadi salah satu sumberdaya ikan yang dimanfaatkan. Hasil tangkapan ikan tembang di PPN Karangantu, Banten menurun dari tahun ke tahun. Oleh karena itu diduga ikan tembang di perairan Teluk Banten telah mengalami eksploitasi berlebih. Tujuan penelitian ini adalah untuk mengetahui status ikan tembang melalui beberapa parameter dinamika populasi ikan agar dapat dijadikan pertimbangan dalam pengelolaan sumberdaya ikan tembang. Pola pertumbuhan ikan tembang di Teluk Banten bersifat allometrik positif. Hasil pemisahan kelompok umur menggunakan metode NORMSEP menunjukkan ikan tembang terdiri dari dua kelompok umur dengan L∞189.0675 mm untuk ikan betina dan 191.6537 mm untuk ikan jantan. Laju eksploitasi (E) mengindikasikan bahwa sumberdaya ikan tembang telah mengalami eksploitasi berlebih. Dugaan pertama kali ikan tembang matang gonad adalah 161 mm. Informasi ini dapat di jadikan dasar alternatif pengelolaan yakni pengaturan penangkapan yang ukurannya lebih dari 161 mm agar ikan-ikan tersebut dapat memijah setidaknya satu kali agar lestari dan berkelanjutan.
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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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