Judul: Uji Usability dengan Metode Cognitive Walkthrough pada Aplikasi Herbal Medicine Systems.
Abstrak: Herbal Medicine Systems merupakan aplikasi mobile berplatform Android yang dikembangkan sebagai ensiklopedia Jamu dan Kampo. Keterlibatan pengguna dalam mengevaluasi aplikasi melalui pengujian usability menjadi sangat penting guna melihat kemudahan pengguna dalam menggunakan aplikasi. Penelitian ini dilakukan untuk menganalisis antarmuka aplikasi mobile Herbal Medicine Systems menggunakan metode Cognitive Walkthrough.. Pengujian usability pada aplikasi Herbal Medicine Systems dilakukan terhadap lima responden. Responden dipilih dengan teknik Purposive Sampling dari mahasiswa Departemen Ilmu Komputer FMIPA IPB dan masyarakat peminum jamu. Hasil evaluasi menunjukkan waktu tercepat yang diperlukan responden untuk menyelesaikan 10 skenario tugas adalah 344 detik. Peresentase skenario tugas yang dapat diselesaikan responden bernilai 98%, sehingga dapat dikatakan bahwa aplikasi mobile sudah baik digunkan untuk mencari informasi jamu dan kampo. Walaupun demikian perlu perbaikan seperti penambahan pilihan bahasa dan perlu adanya fitur registrasi sebelum pengguna aplikasi melakukan penambahan data di menu Databases.
Keyword: herbal medicine systems, usability, cognitive walkthrough

Judul: Pengujian Usability pada Ijah-Webserver dengan Menggunakan Metode Cognitive Walkthrough.
Abstrak: Indonesia Jamu Herbs Webserver (Ijah-Webserver) adalah perangkat lunak aplikasi berbasis web yang memberikan kemudahan untuk mendapatkan informasi konektivitas antara senyawa bioaktif dari suatu tanaman dengan protein. Ijah- Webserver selalu mengalami perkembangan. Pengembangan Ijah-Webserver perlu memperhatikan aspek usability. Pengujian usability bertujuan untuk menentukan apakah Ijah-Webserver bermanfaat, diterima pengguna dan bertahan lama dalam penggunaannya. Penelitian ini melakukan usability testing pada Ijah- Webserver dengan menggunakan metode Cognitive Walkthrough yaitu metode berbasis skenario tugas. Usability testing mencangkup dua komponen yaitu efektivitas dan efisiensi. Berdasarkan hasil analisis usability testing ditemukan hal-hal yang menyebabkan rendahnya usabilitas antarmuka Ijah-Webserver yaitu kurangnya informasi cara menggunakan Ijah-Webserver, penempatan menu/button yang kurang tepat dan keluaran yang masih sulit dibaca. Rekomendasi perbaikan antarmuka Ijah-Webserver berdasarkan hasil analisis yaitu menampilkan pedoman atau petunjuk cara menggunakan Ijah-Webserver, merubah letak menu/button agar mudah ditemukan pengguna dan merubah hasil keluaran serta format unduhan.
Keyword: Cognitive Walkthrough, Ijah-Webserver, Usability Testing

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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