Judul: Analisis Sentimen Body Shaming pada Kolom Komentar Instagram Berbahasa Indonesia dengan Metode Naive Bayes
Abstrak: Instagram merupakan media sosial yang berfungsi untuk berbagi foto maupun video kepada sesama penggunanya. Kurangnya pengetahuan etika dalam bermedia sosial memunculkan permasalahan salah satunya adalah tindak body shaming. Informasi yang terkandung dalam suatu komentar didapatkan dengan cara melakukan analisis sentimen menggunakan metode Naïve Bayes. Data yang digunakan dalam penelitian ini sebanyak 9287 data komentar yang diambil menggunakan API Instagram dengan pembagian data 80 % data latih dan 20% data uji. Penelitian ini bertujuan untuk mengklasifikasikan komentar yang merupakan tindak body shaming atau bukan body shaming. Penerapan metode Naïve Bayes pada data komentar Instagram menghasilkan nilai akurasi sebesar 97.78%., Instagram is a social media platform that accommodates photo and videos sharing among its users. The lack of ethical knowledge in social media raises problems, one of which is comments that contain the acts of body shaming. The information contained in a comment is obtained by conducting a sentiment analysis using the Naïve Bayes method. The amount of data used in this study were 9287 comments, taken using the Instagram API with the distribution of 80% training data and 20% testing data. This study aims to classify comments that fall into the category of acts of body shaming and not body shaming. The application of the Naive Bayes method on Instagram comment data produces an accuracy value of 97.78%.
Keyword: Body Shaming, Instagram, Sentiment analysis, Naive bayes

Judul: Analisis sentimen data twitter menggunakan naive bayes dengan negation handling pada data twitter bahasa Indonesia
Abstrak: Penelitian ini melakukan klasifikasi sentimen dalam 3 jenis yaitu positif, negatif dan netral menggunakan metode klasifikasi Multinomial Naïve Bayes. Analisis sentimen dalam penelitian ini menggunakan data Twitter Bahasa Indonesia dengan data seimbang. Negation Handling memiliki peran untuk menambah akurasi dari klasifikasi. Penelitian awal menunjukkan hasil akurasi Naïve Bayes sebesar 71.07% dan dengan menggunakan Negation handling sebesar 71.48%. Ini menunjukkan bahwa dengan Negation Handling terjadi peningkatkan akurasi sebesar 0.41%. Hasil akurasi belum menunjukkan hasil yang baik, maka dilakukan pelabelan ulang dengan dengan bantuan clustering untuk melihat pengelompokan datanya. Setelah mengalami pelabelan ulang, akurasi yang didapatkan dengan Naïve Bayes adalah sebesar 90.07% dan dengan menggunakan Negation Handling sebesar 92.71%. Negation Handling meningkatkan akurasi sebesar 2.64%.
Keyword: analisis sentimen, klasifikasi, naïve bayes, Negation Handling, twitter

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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