Judul: Perancangan User Experience Aplikasi Belibun Menggunakan Metode Lean UX
Abstrak: Adanya oknum tengkulak mengakibatkan harga hasil panen petani menjadi lebih rendah dibanding harga pasar. Aplikasi Belibun dirancang untuk menjual hasil panennya kepada konsumen tanpa perantara tengkulak. Dalam membangun aplikasi Belibun, aspek pengalaman pengguna diperhatikan agar petani dan konsumen dapat menggunakan aplikasi dengan mudah. Metode yang digunakan dalam membangun pengalaman pengguna aplikasi Belibun adalah lean UX dengan 2 kali pengulangan. Hasil uji pengguna dievaluasi menggunakan teknik cognitive walkthrough. Pada tahap uji pengguna iterasi pertama dilakukan kepada 2 orang yang berprofesi sebagai petani dan diperoleh tingkat keberhasilan prototipe aplikasi Belibun sebesar 63%. Pada tahap uji pengguna iterasi kedua dilakukan kepada 5 orang pengguna dan diperoleh tingkat keberhasilan prototipe aplikasi Belibun sebesar 75%.
Keyword: Belibun, pengalaman pengguna, perangkat bergerak, petani

Judul: Perancangan User Experience Aplikasi Buku Kerja Mandor Perkebunan Menggunakan Metode Lean UX
Abstrak: Mandor perusahaan perkebunan besar bertanggung jawab untuk melaporkan seluruh aktivitas yang dilakukan anggota timnya berdasarkan dokumen rencana kerja setiap harinya. Kendala yang muncul di lapangan adalah mandor hanya dapat melaporkan seluruh aktivitas harian melalui komputer yang tersedia di kantor setelah kembali dari lahan perkebunan. Kendala tersebut dapat diatasi dengan mengembangkan satu aplikasi Android untuk membantu para mandor melakukan pencatatan aktivitas perkebunan anggota timnya tanpa perlu kembali ke kantor. Tujuan penelitian ini adalah merancang user experience aplikasi Buku Kerja Mandor yang memenuhi kebutuhan. Penelitian ini dibuat menggunakan metode Lean UX sebanyak 2 iterasi yang masing-masing iterasinya terdiri atas 4 tahap yaitu declare assumptions, create a Minimum Viable Product, run an experiment, dan feedback and research. Hasil dari penelitian ini berupa prototipe aplikasi Buku Kerja Mandor hingga tahap medium-fidelity. Prototipe yang telah diuji kepada 5 partisipan mendapatkan nilai success rate sebesar 86.67% pada iterasi pertama dan 87.50% pada iterasi kedua.
Keyword: Buku Kerja Mandor, Lean UX, perkebunan, task reminder, user experience

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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