Judul: Produktivitas Pendederan Ikan Pink Tail Characin Ukuran ¾ inci dengan Sistem Pergantian Air Setiap Hari
Abstrak: The study was aimed to determine the water exchange proportion to achieve optimalize seed productivity of pink tail characin fish rearing. The average size of fish was 2.37 cm or weight of 0.03 ± 0.01 g/fish. The fish were reared at density of 2 fish/L in each aquariums at volume of 100 liters. The treatments consisted of exchange water at proportion of 25%, 50%, 75%, and 100% per day with 3 replicates. The results showed the highest survival rate, average length and daily growth rate of 75% exchange water treatment that were 99.83±0.29%, 2.75±0.02 cm, and 3.98±0.12% respectively. The highest length coefficient of diversity, feed efficiency and economic benefit were obtained by daily exchange water at proportion of 75% these were 4.79±0.19%, 12.12±0.19% and Rp 985 417.- respectively. The optimal rearing productivity of ornamental fish pink tail characin size ¾ inch was in the 75% of daily water exchange proportion.
Keyword: water exchanges, stocking density, seed productivity, Pink tail characin

Judul: Produksi Pendederan Ikan Ctenopoma Ctenopoma acutirostre Pada Padat Tebar Berbeda Dan Pergantian Air 30%.
Abstrak: This study aimed to determine the optimal stocking density on fish nursery ctenopoma at size of 2 cm and 30% water changes every day. The treatment in the study was 4 levels of fish stocking densities, ie 2, 4, 6 and 8 fish/liter and quality of the culture media was maintained by replacing the water as much as 30%. Fish reared in 12 aquariums filled with 10.5 liters of fresh water respectivelly and as long 40 days period. The average length of fish seed used was 2.18±0.18 cm. During the rearing, the fish fed with tubificid worm in the morning, noon and night. The results showed that the difference of the treatment did not affect the survival and the coefficient of variance, however increasing the stocking density flollowed by lowering the growth rate, and the feed efficiency. Considering economic value, the highest rearing productivity was achieved by stocking density of 6 fish/liter.
Keyword: Ctenopoma, Production, Stocking density, Water exchange

Judul: Pencarian Masjid Terdekat dengan Location Based Service (LBS) pada Android
Abstrak: When in a trip, a Muslim who wants to pray in the mosque timely, need the nearest mosque information. Such information can be provided through location based services (LBS). LBS consists of application components, component acquisition positions, mobile device, telecommunication networks, and service server. This research has successfully developed Android application that is able to provide the nearest mosque’s information and the mosque’s route on Google Maps. The application uses the acquisition component positioning using assisted global positioning system (A-GPS) in mobile devices. The mobile device used is a smart phone with Android operating system. Then, the telecommunications network uses global system for mobile communications (GSM) network or code division multiple access network (CDMA) network. Service server as content provider on the application is available through three Google API services: Google Maps API as the provider of maps, Google Place API as provider of mosque data, and Google Direction API as provider route to the mosque with the driving mode.
Keyword: