Judul: Curahan kerja, kontribusi anggota keluarga dalam pendapatan rumahtangga dan pola pengeluaran nelayan tradisional di Kabupaten Brebes Jawa Tengah
Abstrak: A number of studies on fishermen’s lives generally focus on poverty and economic uncertainty as a result of living difficulties faced by fishermen and their families. At present, most households do not have only one income source but several sources. In other words, they do diversified jobs or have various income sources. However, the problem is that the opportunity cost or any possible activities the fishermen can do when they do not catch fish is very low and they tend to do the activities although they are not profitable and efficient. The objectives of this research were to analyze the factors that affect the allocation of working time among the households of traditional fishermen who use payang as a catching tool and to examine the factors that influence their income and expenditure. This study used cross sectional data. The model built in this study was intended to be able to identify the economic behaviors among the households of traditional fishermen in Brebes Regency, Central Java, based on the existing data and the results of previous studies with the support of relevant theories.
Keyword: 

Judul: Analisis curahan kerja dan kontribusi penerimaan keluarga nelayan dalam kegiatan ekonomi di desa pantai: studi kasus di desa Pasir Baru, Kecamatan Cisolok Kabupaten Sukabumi
Abstrak: Tujuan dari penelitian ini ditekankan pada upaya menganalisis curahan kerja anggota keluarga dalam kegiatan melaut dan non keluarga melaut, terhadap kontribusi pendapatan anggota pendapatan total serta faktor-faktor yang mempengaruhi keputusan keluarga dalam kegiatan pro- duksi, bekerja dan konsumsi. Faktor-faktor yang mempengaruhi perilaku rumahtangga nelayan dalam kegiatan produksi, bekerja dan konsumsi dianalisis secara simultan dengan menggunakan model ekono- metrika. Model tersebut dikenal dengan "Agricultural Household Model" (Singh et all, 1986) yang diturunkan dari teori perilaku ekonomi keluarga. Model yang digunakan dalam penelitian ini berdasarkan pada rumusan Bagi dan Singh (1978), dengan memasukan peubah yang relevan dengan kegiatan ekonomi di desa pantai, dst
Keyword: Employment, Income, Fisherman's income

Judul: Synthesis of Apatite - Chitosan Composite Using Duck Eggshell and Chitosan with Temperature and pH Control
Abstrak: Composite of apatite-chitosan was prepared by using chitosan as polymer matrix. Calcium phosphate was prepared from CaO and (NH4)2HPO4, which the ratio Ca : P had to be 1.67. Chitosan is produced by deacetilase from biopolymer chitin. Duck eggshell (95% CaCO3) as starting material was converted to be calcium oxide (CaO) through calcinations with temperature 1000oC for 5 hours. In-situ and ex-situ methods were prepared from apatite and chitosan (dissolved with acetate acid 2%). Calcium phosphate prepared for bone implantation, but it is too fragile and brittle to be implant into the body. So addition of chitosan can decrease crystalinity and increase mechanic characteristic (tougher). Composite apatite-chitosan was resulted by fast precipitation. Fast precipitation was held in a breaker glass with nitrogen atmosphere, under controlled temperature at 37oC and pH 7, in order to increase amount of hydroxyapatite. Precipitation with CaO which was dropped by (NH4)2HPO4. Hydroxyapatite and chitosan were appearing at samples with in-situ and ex-situ methods which indicating by peak matching of XRD (closed lattice parameter, crystal size), overlapping at FTIR spectra and supporting by SEM picture (homogenous and agglomerated particle). However, it still needs further research to examine biocompatibility osteoconductive degree of sample by in-vivo and in-vitro test.
Keyword: