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: Comparison of HIV Model with and without Time Delay
Abstrak: Acquired immunodeficiency syndrome (AIDS) is the reduction of the human immune system. AIDS is caused by human immunodeficiency virus (HIV). No medicine has been found for this desease until recently. An AIDS therapy is usually performed with highly active antiretroviral therapy, namely reverse transcriptase inhibitors, protease inhibitors and combination of both. Various models have been developed to explain the immune system of patients with AIDS, namely the HIV, response and the time delay model. This paper discusses the comparison between the dynamics of the HIV virus, the dynamic response of protease inhibitors and dynamics of time delay. The dynamics model of HIV is influenced by the level of white blood cells produced and the rate of its death. Dynamics of protease inhibitors on the response and the time delay model is influenced by the death rate of infected white blood cells and the failure rate of treatment.
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