Judul: Gender relation and fertility In Neglasari Village, Jasinga Sub-District, Bogor Regency, West Java Province
Abstrak: Fertility is not merely a biological or demographical issue. Since it is embedded to social relation of human being, it is closely related to their desire and values. Seeing fertility beyond numbers will be useful to explore the desire of each actor, how do they relate to each other and with the community, values and other sociological and psychological aspect embedded in the activity. This research tries to explore the way the relation between gender and fertility work, especially since there is no generic theory has been built on the ground of this subject. The research employed qualitative method to explore and gain understanding on how the women relate to other actor. Taking advantage from previous researches, the framework is built on Mason and Smith (2003) women autonomy aspect, desired fertility and Bongaarts (1982) proximate determinant concept. Proximate determinants are employed to link the gap between social-economic and biological variables, as there is an undeniable fact that fertility is the result of a biological activity. Result of the research shows that although the value in the community as a traditional Islamic community suggests high number of fertility, women in this study area to some extent able to manage their control over fertility. The control is operated through desired fertility and the proximate determinants, i.e. using of contraception and postponing age of marriage which are affected by women autonomy and power aspects as proposed by Mason and Smith (2003). The referred women autonomy and power aspects are women’s economic decision-making power, their family size decision-making power, their physical freedom of movement, community-level gender attitude measures, and their space in household decision-making. The conclusion of study shows that in the area studied, using of contraception is more likely to affect actual fertility than postponing age of marriage.
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Judul: Faktor-Faktor Sosial Ekonomi yang Mempengaruhi Fertilitas Perempuan dengan Lama Perkawinan di Bawah 10 Tahun di Provinsi Jawa Barat
Abstrak: The high rate of population growth is the main problem faced by the development of developing countries, including Indonesia. Population explosion occurred mainly due to a decreased level of mortality (death) while the population fertility rates can not be well controlled. The purpose of this study was to determine the socio economics factors that affect fertility (births) in the Province of West Java. Information factors can be used as one tool in population control considerations. This study used the data of National Socio economic Survey of West Java Province in 2011. Response variable in this study is the number of biological children born alive, whisch is continuous, so that the proper analysis is a regression tree with CART algorithm. Regression tree in urban produce 6 end nodes with the most effective explanatory variable is the contraception status, husband’s education, expenditure per capita per month, and the use of toilet. Regression tree in rural produce 5 end nodes with the most effective explanatory variable is the status of the use of family planning, expenditure per capita per month, and the use of toilet.
Keyword: regression tree, fertility, CART

Judul: Hydroxyapatite-Chitosan Composite Coating on Stainless Steel 316 to Improve Corrosion Resistance
Abstrak: Metals that were used in bone implantation should have good corrosion resistance that were not easily corroded when implanted into the body. Metal corrosion resistance of stainless steel 316 can be enhanced through the metal coating by hydroxyapatite-chitosan composite with composition ratio of hydroxyapatite (gram) and chitosan 3% (mL) 0.2:0, 0.2:0.1, 0.2:0.5, 0.2:1.0, and 0.2:1.5. Besides improving the corrosion resistance of metal, the presence of chitosan also maintain the position of hydroxyapatite on metal surfaces. Corrosion resistance increases with increasing amount of chitosan added and the best composition of hydroxyapatite-chitosan composite was 0.2:1.0.
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