Judul: Aplikasi Pencari SPBU Terdekat di Area Bogor dengan Location Based Service Berbasis GPS pada Android
Abstrak: Nowadays mobile phones are not only used as a means of communication, but also by taking advantage of some features such as the global positioning system (GPS), a mobile phone can be used as a navigational tool from user position to object around the user. Gas station is one of the point of interest (POI), because its location is very useful especially for motorists. This study aimed to build an application of location based services (LBS) in the Bogor area, to display the gas station on the map, to determine the nearest gas station that is located around the user and to display the route to the gas station. The application is built for the Android smartphone, with Java programming language, SQLite as the database storage, GPS to obtain the user's position and Google Maps as the map viewer. From the test conducted, this system has been able to work well and produce correct output.
Keyword: Android, location, LBS, GPS, gas station

Judul: Aplikasi Pencari Fasilitas Umum Terdekat Di Area Bogor Dengan Location Based Service Berbasis Geotagging Pada Android
Abstrak: Kota Bogor merupakan salah satu kota wisata yang paling banyak dikunjungi oleh wisatawan lokal dan internasional. Sebagai kota wisata, Bogor memiliki berbagai fasilitas umum seperti SPBU, masjid, dan ATM yang dibutuhkan oleh wisatawan. Penelitian ini mengembangkan aplikasi pencari fasilitas umum di area Kota Bogor pada telepon pintar dengan sistem operasi Android. Pengguna Android yang memiliki fitur Global Positioning System (GPS) dapat menemukan lokasi fasilitas umum terdekat dengan teknologi Location Based Service (LBS). Aplikasi dikembangkan pada sisi klien dan server menggunakan DBMS SQLite dan MySQL serta bahasa pemrograman Java dan PHP. Pengguna dapat berbagi informasi lokasi fasilitas umum dengan teknologi geotagging yang terdapat pada telepon pintar. Penelitian dilakukan dalam beberapa tahapan, mulai dari analisis, desain sistem, implementasi dan pengujian. Pengujian sistem dilakukan dengan menggunakan metode black-box dan evaluasi usability. Evaluasi usability dilakukan pada 6 responden, dengan 5 aspek usability. Evaluasi usability pada sistem menghasilkan nilai 85.2%. Hasil pengujian yang dilakukan, aplikasi ini sudah mampu bekerja dengan baik dan menghasilkan keluaran sesuai dengan ke-5 aspek usability.
Keyword: Android, geotagging, GPS, LBS, lokasi terdekat, fasilitas umum

Judul: Mercury Toxicity and It’s Effect on Histopathology Change of Nile Tilapia (Oreochromis niloticus).
Abstrak: Nile tilapia (Oreochromis niloticus) is one of fish species that oportunity to contaminated with mercury. The effects of pollutants can damage living organisms organs and can cause death. The effects caused mercury had acute or chronic character. The aims of this study are to determine threshold and acute toxicity of mercury chloride (HgCl2) of Nile tilapia (Oreochromis niloticus), to assess the effect of mercury chloride (HgCl2) on several biometric parameters (survival, growth rate of average daily weighted, liver condition, bile and reproductive variability of Nile tilapia (Oreochromis niloticus), assess the level of damage to the histological structure of the gills, liver and kidney of Nile tilapia (Oreochromis niloticus) caused mercury chloride (HgCl2) exposure. This study was conducted from February to June 2013. Nile Tilapia (Oreochromis niloticus) were used in this study were female with average weight 20 grams or 11-13 cm length range. Toxicant materials used in this study was mercury chloride (HgCl2). Fish were reared in each aquarium 60x40x30 containing 48 liters of water. This study consists of three stages: a preliminary test, acute test, and sub-chronic test. To determine the changes in biometric condition of tilapia approximated by measuring the survival rate (SR), the growth rate of average daily weight , the content of mercury in the fish organs, hepatosomatic index (HSI), the relative bile volume (VER), gonadal soamtic index (IKG), fecundity and oocit diameter, tissue damage caused by mercury in fish organs by making histological preparations stained with hematoxylin and eosin. The median lethal concentration (96 hr, LC50) of Mercury Chloride was calculated as 1,64 mgL--1.The survival rate was highest in the control treatment (46,67 %) . Mercury chloride with concentration 0.196 mgL--1 show significant effect to changes HSI and relative bile volume, and oocyte diameter of Nile tilapia (p < 0,05). Mercury chloride with a concentration of 0,164 mgL-1 and 0,196 mgL-1 have not a significant effect on the growth rate of weight, gonadal somatic index and fecundity of Nile tilapia (p > 0,05). Mercury chloride cause damage to gills (hyperplasia, hypertrophy, proliferation and neukrosis), liver (hyperplasia, hemorhage, shrinkage of hepatocytes, proliferation and neukrosis) and kidney (hyperplasia, hemorrhage, shrinkage of the glomerulus, proliferation and neukrosis).
Keyword: Nile tilapia, Hepatosomatic indexs (HSI), histopathology