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: 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: Thermal Characteristics and Dynamics of Tropical Cyclone over Western North Pacific Ocean: A Case Study of Typhoon Songda (Chedeng) 2011
Abstrak: The frequent occasion of Tropical Cyclone (TC) over Western North Pacific (WNP) Ocean lies from 10˚N to 26˚N and 121˚E to 170˚E. Sources of TC development come from warm ocean temperature where latent heat is released during condensation processes and subsequently concentrated in the boundary layer. Relative humidity at 850-700 hPa is responsible to produce the most intense storm. Meanwhile, weak vertical wind shear between 850-200 hPa is one of the dynamical factors that lead to the development of TC. Pressure level of 850-200 hPa is chosen to minimize the thermodynamic effect in the lower troposphere. Typhoon Songda (Chedeng in the Philippines) or TSC lasted from May 18th to 30th, 2011 and strengthened into powerful Super Typhoon stage between May 24th and 27th. Long curving track and the exhibition of all sequences of TC life cycle, TSC is then considered as an ideal case of TC. The objective of the study with case of TSC is to investigate the role of thermal characteristics and dynamics on TC intensity. The research is carried out by using Advanced Research of Weather Research and Forecasting model (WRF ARW model) version 3.3. Two domains are employed in the model. The first domain situate from 02˚N to 40˚N and 118˚E to 149˚E and cover spatial resolution () of 33.1 km. The second domain situate from 09˚N to 27˚N and 119˚E to 132˚E with of 11 km. Timestep of the model () is 120 seconds. The model is supported by the following physical parameterization, i.e., Yonsei University Scheme (YSU) in the boundary layer, Kain-Fritsch scheme (KF) in the cumulus, and WRF Single-Moment 3-class scheme in the microphysics. Initial meteorological condition prior to the formation of the cyclone is generated using WRF ARW standard-release model. Sensitivity of the model output is obtained from a selected single-parameter change scenarios, namely, 10 % to 20 % decrease and increase of wind shear initial data at 850-200 hPa, and by 10 % to 20 % decrease of relative humidity initial data at 850-700 hPa. The result showed that the negative correlations between wind shear and intensity are found in wind shear scenarios. Wind shears of 10 ms-1 which lead to strengthening of the wind intensity in the early period of Typhoon development are found in wind shear scenarios. The effect of wind shear changes on wind intensity is statistically significant in the 20 % wind shear scenarios. During mature stage, weak wind intensity occurred when wind shear increase as given in the WRF standard-release and the 20 % decreasing scenario. Different situation is found in the 20 % increasing scenario where wind shear tend to weak and lead to strong wind intensity at this stage. Meanwhile, the reduction of moisture supply at 850-700 hPa resulting from 20 % decreasing relative humidity play a major role in the weakening of wind intensity and reduces mechanical energy of the cycle process as much as 300 J kg-1.
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