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: Aspek Reproduksi Ikan Tembang (Sardinella fimbriata Cuvier dan Valenciennes 1847) di Perairan Teluk Banten.
Abstrak: Fringescale sardinella (Sardinella fimbriata) has an important economic value and high levels of utilization. Indicated the availability of S. fimbriata decline in reproduction studies Karangantu so necessary for further management. The research was conducted in May-August 2012. Based on this research, it is known reproductive pattern S. fimbriata from Banten Bay. Total number of fish taken during the study were 765 individuals. Results showed that the sex ratio of male and female Fringescale sardinella unbalanced (0,7:1) with Chi-square test. Condition factor S. fimbriata ranged from 0,9248 to 5,8707. Fringescale sardinella female mature more rapidly than male fish gonads with mature gonads were first size of 179,4 mm (female) and 192,4 mm (male). Peak spawning season of Fringescale sardinella in Banten Bay waters allegedly occurred in May and late August. Reproductive potential of S. fimbriata high at 9 691-173 335 eggs. Egg diameter of S. fimbriata ranged from 0,0250 to 0,6250 mm with the spread mode from two types of spawning peaks with partial (partial spawner).
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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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