Judul: Aplikasi Augmented Reality Penunjuk Ruangan Kampus Institut Pertanian Bogor
Abstrak: Aplikasi navigasi dapat membantu seseorang untuk mencapai tujuannya dengan lebih cepat dan efisien. Pada umumnya, navigasi menggunakan GPS sebagai alat bantunya. Akan tetapi, GPS seringkali tidak berfungsi dengan baik pada kondisi dalam ruangan terutama pada lokasi kampus IPB yang memiliki banyak ruangan. Tujuan dari penelitian ini adalah untuk membuat prototipe aplikasi Augmented Reality (AR). Aplikasi dibuat menggunakan Vuforia SDK. Interaksi AR yang digunakan pada aplikasi ini menggunakan image target sebagai penanda suatu lokasi sehingga pengguna aplikasi lebih mudah mendapatkan informasi lokasi ruangan. Dari hasil evaluasi pengguna didapatkan 108 dari 180 jawaban responden menyatakan bahwa aplikasi ini memenuhi user expectation sebagai aplikasi AR.
Keyword: Augmented Reality, Image target, Vuforia, Interaksi, Navigasi, Protipe aplikasi, Desain, Vufaria SDK

Judul: Rekayasa Augmented Reality Mobile Campus Tour Institut Pertanian Bogor
Abstrak: Navigation is a complex problem that requires a set of skills and tools. Because of the complexity, a navigator will be more focused on the process and tools rather than their surrounding. This problem can be solved using augmented reality (AR), a derivation of virtual reality which augments real world with virtual objects. With AR, we can mark a real world location using virtual markers and put relevant information, which is automatically processed by a computer, of that location. This will simplify and reduce the effort of navigation process. Today, many smartphones have enough computing power to run an augmented reality application. This research presents a prototype of augmented reality mobile campus tour in Bogor Agricultural University on Android smartphone. The application is able to give the user estimated bearing and distance of the locations relative to user’s current location. Distance and bearing are computed using Haversine formula to reduce the computation process. To reduce noise in accelerometer and magnetometer values, exponential smoothing is used with accelerometer smoothing factor = 0.2 and magnetometer smoothing factor = 0.5.
Keyword: 

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.
Keyword: