Judul: Analisis Manfaat Sosial Ekonomi Ruang Terbuka Hijau pada Normalisasi Waduk Ria Rio Jakarta
Abstrak: Increasing flood disaster in DKI Jakarta makes the government do some efforts to increase the quality of a reservoir and its environment through reservoir normalization program. The specific objective of this study is to identify the public perception towards the normalization of Ria Rio Reservoir and the socio economic benefits of it, estimate the number of willingness to pay of people around the Ria Rio Reservoir toward the effort of preservation of the open green space around it, and identify factors that affect the value of the willingness to pay of the community toward preservation efforts of the open green space around the Ria Rio Reservoir. The results of this study indicate that people's perception of each indicator to the development of open green space around the Ria Rio Reservoir is well worth. Socio-economic benefits of the normalization of Ria Rio Reservoir which has been enjoyed by society is the park can be used as a recreation area, the park become public sports facilities, they get entertainment by fishing in the reservoir, nearby the reservoir becomes strategic for selling things as many visitors and gain employment as sweepers and garbage collectors. The average yield of willingness to pay of 61 respondents who are willing to pay is IDR 44.836,07 per month per person. Factors that affect the 10% significance level were gender, age, income level, education level, residence status, and length of stay.
Keyword: willingness to pay, socio economic benefit, reservoir, open green space, normalization

Judul: Analisis kerugian ekonomi dan kesediaan membayar masyarakat dalam upaya perbaikan lingkungan perumahan (Studi kasus Perumahan Dosen IKIP, RW 02, Kelurahan Jatikramat, Kecamatan Jatiasih, Kota Bekasi)
Abstrak: RW 02 IKIP Lecture’s Housing Complex in one of the housing areas in Jatiasih District that has been affected by flood. As flood water had brought loss to the society, it takes effort to restore the residential neighborhood, to minimize the effect of flood in the future. The purposes of this study are to identify the characteristic of respondents, to estimate the economic loss, to estimate willingness to pay for environmental improvement, and to identify the factors that influence willingness to pay for the environmental improvement. This study used four methods of analyses, namely: (1) descriptive analysis, (2) damage assessment analysis, (3) willingness to pay analysis, and (4) multiple linear regression analysis. The result showed that the impact of flood in RW 02 IKIP Lecture’s Housing Complex are the disruption of activity, public health, income losses, the damage on houses and household furniture also the decreasing of housing environmental condition. Total estimated of economic loss of the society in RW 02 IKIP Lecture’s Housing Complex by flood in January to February period 2014 was as much as IDRRp1,055,129,468.20. The mean value of willingness to pay for 95 respondents, who are willing to pay for environmental improvement is IDR26,736.84 per month per household. Factors that influence the willingness to pay were education, family dependent, income, housing status, and flood elevation.
Keyword: Bogor Agricultural University (IPB), willingness to pay, flood, environmental improvement, economic loss, Bekasi

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.
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