Judul: Dampak Kehadiran Ritel Modern terhadap Profitabilitas Pedagang Pasar Tradisional di Provinsi DKI Jakarta
Abstrak: The aims of this research are to analyze the impact of modern retail on the profitability level of traditional market traders in DKI Jakarta. The research was conducted on the three traditional markets in DKI Jakarta, which are Jembatan Besi Market and Menteng Pulo Market as treatment markets (traditional market which is close to the modern retail), Lenteng Agung Market as control market (traditional markets which is far from modern retail). This research uses t-test, chi-square test and ordinal logistic regression. The existence of modern retail affect the profit of traditional market traders changes in DKI Jakarta. The closer distance the traditional market to the modern retail, the more chance of traditional market traders to decrease their profit
Keyword: t-test, chi-square test, ordinal logistic regression, profit, performance, characteristics

Judul: Dampak Perkembangan Toko Modern Terhadap Kinerja Pedagang Produk Pertanian Pada Pasar Tradisional di Kota Bekasi
Abstrak: Modern stores have been present in major cities in Indonesia since last three decades. With the rapid growth of the ritail sector, in 1998, Indonesia made a deal with the IMF that foreign ritelers can freely invest in Indonesia. This has led to the perception that traditional markets are the real victims of the ritail sector competition which leads to reduced consumer due to modern shops can provide advantages that can not be provided by traditional markets such as convenience, product quality and safety. Traditional market traders who sell the majority of agricultural products are in danger because these commodities are also a large part of product line supermarkets and hipermarkets. This study aimed to analyze changes of agricultural products trader performance in traditional markets as the growing number of modern stores in Bekasi and the factors that influence changes of revenue and profits traders of agricultural products. Results of paired t-test showed that there are a change in their respective markets of the variables revenue, profit, operating hours, circulation of goods, number of buyers, the number of customers and the number of employees experiencing. At the revenue variable, real influential factors are a gender dummy, education level, number of kiosk, spacious kiosk, main commodity is rice dummy and main commodity is fresh fruits and vegetables dummy. At the profit variable, real influential factors are a gender dummy, level of education, trading experience, number of kiosk, spacious kiosk and location dummy.
Keyword: Multiple Regression, paired t-test, Modern Stores, Traditional Market, Traders

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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