Judul: Sistem sosial ekologi tambak dan sawah di wilayah pesisir kabupaten Karawang
Abstrak: Kedudukan manusia sebagai anggota dari suatu sistem sosial budaya dan sebagai salah satu komponen biologis dani biosfer menempatkan manusia pada kedudukan yang unik di alam. Manusia di satu sudut dapat dipandang sebagai penyebab dari timbulnya berbagai masalah lingkungan hidup, tapi di sudut lain juga dapat berlaku sebagai pengendali lingkungannya. Manusia memasuki suatu sistem ekologi tertentu tidaklah semata-mata hanya sebagai suatu organisme yang mempunyai hubungan fisik dengan organisme yang lain, tetapi ia juga membawa kebudayaan, suatu fak- tor yang mempengaruhi dan dipengaruhi oleh seluruh total. jaringan kehidupan (Steward, 1955; dalam Rappaport, 1971).. Adanya kebudayaan ini memungkinkan manusia memiliki lenturan ekologis yang lebih tinggi dibandingkan dengan. organisme lainnya. Sebagai akibat faktor keturunan kendala-kendala biologis dalam memperoleh dan dan memproses bahan makanan, suatu organisme tertentu hanya dapat ber- peran pada satu atau beberapa ekosistem saja. dst ...
Keyword: Coastal area;, Social-ecology;, Social system;, Bogor Agricultural University;

Judul: Studi Faktor-Faktor Sosial Ekologi dalam Pengelolaan Ekosistem Mangrove Berbasis Masyarakat (Studi Kasus Desa Kartika Jaya dan Desa Wonosari Kecamatan Patebon, Kabupaten Kendal, Provinsi Jawa Tengah)
Abstrak: This study was conducted to determine the typology of mangrove and links between social conditions and community participation in mangrove ecosystem in the conservation area of Kartika Jaya and Wonosari village, District Patebon, Kendal. This research has been conducted with direct observation in the field and interviews with 30 persons in every village. The result from observation of ecological mangrove condition show that typology of mangrove in both area are dominated by Avicennia marina with good condition, mangrove density range is about 1067-1178 ind/ha and 1622-2000 ind/ha in accordance with the Decree of the State Minister for the Environment No. 201 Year 2004. Analysis of Principal Component Analysis (PCA) results that the social factors affecting the conservation in Kartika Jaya villages are community participation in mangrove planting, knowledge about the function of mangrove ecosystems, the distance to the ecosystem, and type of job. While the determined social factors in Desa Wonosari are community participation in mangrove planting as well, knowledge about functions and types of mangrove, the abrasion experience, and home distance.
Keyword: Bogor Agricultural University (IPB), society, ecology, social

Judul: Separation of Neodymium from U3Si2/Al Fuel Plate for Burn-Up Determination
Abstrak: Neodymium is a common fission product produced in nuclear fission reactions. Neodymium in this study was chosen as a burn-up indicator for U3Si2/Al fuel element plates because the neodymium isotope is a stable fission product with a fairly high yield. Some procedures were carried out to separate neodymium, starting with the separation of cesium isotopes (137Cs, 134Cs) through the precipitation method, then separation of uranium isotopes (235U, 238U) and plutonium isotopes (239Pu, 238Pu) with Dowex 1x8 ion exchange resin, and separation of neodymium (Nd), samarium (Sm), as well as cerium (Ce) with Dowex 1x4 ion exchange resin. The Cs recovery reached 99.95%. The U and Pu isotopes resulting from the separation are subjected to an electrodeposition process and the weight of each isotope can be measured with an alpha spectrometer. The separation results of Nd from Sm and Ce have been proven using an XRF spectrometer. The neodymium isotopes separation was corrected using the standard addition method, and an average total Nd content of 2.4 ppm was obtained in the PEB U3Si2/Al bottom solution. It is hoped that this separation method can be applied in determining burn-up of nuclear fuel.
Keyword: neodymium, burn-up indicator, U3Si2/Al fuel plate