Judul: Studi Patologi Kerang Hijau (Perna viridis) asal Muara Kamal, Teluk Jakarta
Abstrak: Green mussel (Perna viridis) is a filter feeder organism that is abundant in nature and have a long life span. The mussel have become a biologic indicator for environmental contamination. Pathological conditions caused by environmental contaminants and infections can be observed by staining the tissue section. The aim of this study was to observe histopathological finding of green mussel cultured at Muara Kamal, Jakarta Bay. Twenty one green mussels of various size and age were observed. The lesions found were degenerative lesions such as pigmentation and loss of epithelial cilia. These lesions were considered due to low heavy metals contamination since the measurement of Hg, Pb, and Cd level still in the normal range. Hemocytes infiltration observed in some tissue were thought as body defense reaction. The protozoan Nematopsis spp. infection were detected in gills lumina, connective tissue of mantle and within digestive tract.
Keyword: Bogor Agricultural University (IPB), Perna viridis, histopathology, green mussel

Judul: Studi Morfometrik Perna Viridis Linnaeus 1758 di Muara Angke dan Pelabuhanratu
Abstrak: The water in North Jakarta is polluted water. This pollution affect the life of biotic in the water. Green mussel (Perna viridis) is one species that can live in that polluted water. Environment affect green mussel’s growth. The objective of present study is to compare the growth pattern and morphometric of Perna viridis in polluted area (Muara Angke) and less polluted area (Pelabuhanratu). This study used graphic analyse method to see the connection between each parameter. The results of this study proves there is morphometric difference in shell length with average for Muara Angke and Pelabuhanratu with value 54.14 mm and 49.94 mm, shell width with average for Muara Angke and Pelabuhanratu with value 25.86 mm and 24.77 mm , shell height with average for Muara Angke and Pelabuhanratu with value 17.5 mm and 14.74 mm , shell weight with average for Muara Angke and Pelabuhanratu with value 4.78 g and 3.52 g , shell length and shell weight ratio with average for Muara Angke and Pelabuhanratu with value 13.28 and 15.41 , shell length and shell width ratio with average for Muara Angke and Pelabuhanratu with value 2.11 and 2.02 , shell length and shell height ratio with average for Muara Angke and Pelabuhanratu with value 3.33 and 3.4, shell width and shell height ratio with average for Muara Angke and Pelabuhanratu with value 1.59 and 1.7, and condition index of Perna viridis with average for Muara Angke and Pelabuhanratu with value 12.14 and 12.98.
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Judul: Aproksimasi Fungsi Sinus dan Kosinus sebagai Kombinasi Linear dari Fungsi Eksponensial
Abstrak: Salah satu gagasan yang menarik dalam matematika adalah aproksimasi suatu fungsi oleh fungsi lain. Sebagai contoh, fungsi polinom dapat diaproksimasi menggunakan deret Taylor atau fungsi persamaan diferensial dapat diaproksimasi menggunakan deret Fourier. Adapun fungsi yang dapat mengaproksimasi fungsi lain salah satunya adalah fungsi eksponensial. Kemungkinan mengaproksimasi fungsi dengan kombinasi linear dari fungsi eksponensial dari bentuk eˣ, e²ˣ, ... dianggap sebagai perkembangan sejajar dengan gagasan Deret Taylor yang mengaproksimasi fungsi dengan kombinasi linear dari segi fungsi kuadrat. Fungsi sin x dan cos x digunakan sebagai target untuk menilai seberapa baik aproksimasi yang dilakukan oleh fungsi yang diberikan. Aproksimasi fungsi sinus dan kosinus menggunakan hampiran Taylor lebih akurat dibandingkan dengan aproksimasi menggunakan fungsi eksponensial.
Keyword: Aprosimaksi eksponensial, aproksimasi fungsi, aprosimaksi Taylor, fungsi eksponensial