Judul: Asupan Vitamin A, Status Vitamin A, dan Status Gizi Anak SD di Kecamatan Leuwiliang, Kabupaten Bogor
Abstrak: Growth in human life is influenced by various factors, one of them is nutrient intake. Nutrient intake still a problem that affects the quality of human resources. The objective of this research was to study the intake of vitamin A, vitamin A status, and nutritional status of primary school children in Leuwiliang Sub-District, Bogor Regency. There were 31 children grade 2 and 3 in SD Angsana I and II Cibeber Village selected by purposive sampling technique. The results showed that more than half of the children had medium sufficient levels of vitamin A (54.8 %) with mean value levels of vitamin A 112.3%. Generally, they had normal nutritional status (93.5%). More than half of children had low vitamin A status (58.1%) with mean value retinol serum is 10.7 μg/dl . The result also found that relationship between the level of adequacy of energy and protein with nutritional status of the children were not significant (p>0.05). The relationship between intake of vitamin A to vitamin A status also showed no significant relationship (p>0.05). It was presumably due to the presence of other factors (reserves of vitamin A in the liver). There was no significant relationship between vitamin A status and nutritional status (p>0.05). It was presumably due to the presence of other factors (food consumption, socio-economic and disease factors) affected nutritinal status.
Keyword: school-age children vitamin A consumption, energy and protein consumption

Judul: Tingkat Konsumsi Zat Gizi, Status Vitamin A dan Status Gizi Anak Sekolah Dasar Setelah Mendapatkan Intervensi Sayuran Sumber Vitamin A (Studi Perbandingan di Desa Karangtengah dan Ciheulang Tonggoh, Kecamatan Cibadak, Kabypaten Sukabumi, Jabar)
Abstrak: Tujuan penelitian ini adalah untuk mengetahsi tingkat pendidikan formal orangtua, pendapatan keluarga, besar keluarga dan pola konsumsi pangan keluarga; membandingkan tingkat konsumsi energi, protein dan vitamin A serta status gizi dan status vitamin A antara anak yang telah mendapatkan intervensi dengan yang tidak mendapatkan intervensi; mengetahui hubungan tingkat konsumsi energi, protein, vitamin A, dan status gizi anak dengan tingkat pendidikan formal ibu, pendapatan keluarga dan besar keluarga; serta mengetahui hubungan status vitamin A anak dengan status gizinya. Penelitian ini dilaksanakan di SD Karangtengah V dan Karanghilir yang terletak di Desa Karangtengah, dan SD Karangtengah I1 dan VIII di Desa Ciheulang Tonggoh, Kecamatan Cibadak, Kabupaten Sukabumi; selama tiga bulan, dari bulan Agustus sampai Oktober 1992. Contoh diambil secara purposive dari anak kelas 3,4 dan 5 yang berstatus gizi kurang dan tidak menderita penyakit menahun, yaitu sebanyak 38 anak yang telah mendapatkan intervensi juice wortel (kelompok intervensi yang terletak di Desa Karangtengah) dan 41 anak yang tidak mendapat intervensi (kelompok kontrol yang terletak di Desa Ciheulang Tonggoh).
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Judul: Bifurkasi Hopf pada Model Siklus Bisnis Kaldor Kalecki tanpa dan dengan Waktu Tunda
Abstrak: Business cycle model is one of dynamical system models in economic. One of the business cycles model is Kaldor-Kalecki model. Kaldor-Kalecki business cycle model that is written in delayed defferential equations, is a business cycle model that involves gross product and capital stock of a company. In this paper Kaldor-Kalecki business cycle model is analyzed using both nondelay and delay in time of capital stock. By Taylor expansion for the time delayed model, an analysis of stability around the fixed points has been done. Furthermore, by using Hopf bifurcation theorem, it can be shown that there exists periodic orbits and limit cycle. In the nondelayed model, changing the parameter of goods market could lead to the occurrence of Hopf bifurcation and the existence of limit cycle. Similarly, for the delayed model, it has been shown that changing the time delay parameter may result in the occurrence of Hopf bifurcation and limit cycle.
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