Judul: Understanding Customer Insight by Segmenting, Profiling, and Churn Analysis in Mobile Telecommunication
Abstrak: As the telecommunication industry has rapidly developed, it may cause tighter competition among providers. Accurate customer analysis such segmentation, profiling, and churn analysis are the appropriate tools to encounter this challenge. Providers compete fiercely to each other in acquiring new subscribers and retaining the existing ones to raise profitability. To gain high value customer, providers need to know well about their customers; what they wants and what they needs. So that it is necessary to classify subscribers in several segments and profile them according to desirable criteria. Moreover, provider also has to recognize the predominant factors influence customer churn. Conventional statistical methods such Logistic Regression is very successful in predicting customer into churner or non-churner. Furthermore it is needed to accommodate changes of customer characteristics by forecasting the time of ‘churner’ predicted churn using survival analysis. It is possible to diagnose and repair the root causes of customer resignation and dissatisfaction based on logistic regression and survival analysis.
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Judul: Desain Model Prediksi Churn Pelanggan Menggunakan Predictive Analytics Untuk Toko Kopi Modern
Abstrak: In today's competitive world, moving toward customer-oriented markets with increased access to customer's transaction data, identifying a loyal customer, predicting customer attrition, and estimating their lifetime value makes crucial. Since knowledge of customer value provides targeted data for personalized markets, implementing a customer relationship management strategy helps a company identify, segment customers, and create long-term relationships. As a result, they can maintain loyalty and minimize attrition. The goals of this research are: (1) to model a new business process, (2) to predict the customer churn using data mining tools based on CRM, (3) to recommend a fit strategy to prevent churn and maintain the loyalty, and (4) to evaluate the result from customer churn prediction. We used the customer's past transaction data, and it had 8 attributes: customer number, name, gender, handphone number, quantity, recent visit, total spending, and frequent visit. The result was that this system had three stakeholders: customer, management staff, and management staff internal. We conducted the surveys to all the registered customers to get the satisfaction data and continued by RFM analysis, CLV, and clustering based on the customer's past transaction. The result obtained from RFM, CLV, and Clustering predicts the churn using decision tree analysis. As the final result of this research, we obtained 31 rules with 86% accuracy in the model. The marketing strategies are then designed to prevent churn and maintain loyalty.
Keyword: customer relationship management, churn prediction, RFM, CLV analysis, decision tree analysis

Judul: Penapisan Hepadnavirus Secara Serologik Dan Molekuler Pada Monyet Ekor Panjang (Macaca Fascicularis) Di Habitat Ex-Situ
Abstrak: Penemuan infeksi virus hepatitis B (VHB) monyet ekor panjang (Macaca fascicularis) di Pulau Mauritius pada tahun 2013 merupakan temuan baru yang menunjukan bahwa penyakit ini dapat menginfeksi jenis satwa primata dari famili Cercopithecidae. Temuan tersebut hanya dilaporkan pada M. fascicularis yang berada di benua Afrika, sehingga menjadi alasan dilakukannya investigasi pada M. fascicularis asal Indonesia. Untuk mendapatkan gambaran keadaan tersebut, sampel darah M. fascicularis diambil dari berbagai lokasi habitat ex-situ. Uji penapisan terhadap antigen permukaan virus hepatitis B (Hepatitis B surface antigen, HBsAg) dilakukan pada 95 sampel plasma dan serum M. fascicularis yang berasal dari penangkaran, pusat penyelamatan satwa, dan topeng monyet. Upaya pemeriksaan DNA VHB dilakukan pada sampel yang menunjukan hasil seropositif terhadap HBsAg. Uji penapisan menunjukan bahwa sebanyak 11 dari 95 (11.6%) sampel reaktif terhadap HBsAg. Antigen permukaan virus hepatitis B lebih banyak ditemukan pada monyet di pusat penyelamatan satwa dan topeng monyet (55%) dibandingkan dengan satwa penangkaran (45%). Hasil seropositif HBsAg pada sampel M. fascicularis yang diperiksa dengan teknik ELISA menggunakan kit HBsAg manusia mengindikasikan adanya kemiripan protein antigen permukaan VHB manusia dengan yang ditemukan pada M. fascicularis, karena antibodi monoklonal yang digunakan dalam uji ELISA pada penelitian ini bersifat spesifik mengikat HBsAg manusia. Meskipun uji PCR terhadap sampel tersebut tidak menunjukkan adanya DNA VHB, hasil seropositif HBsAg mengindikasikan bahwa M. fascicularis dapat terinfeksi VHB atau virus yang mirip VHB secara alami.
Keyword: virus hepatitis B, monyet ekor panjang, habitat ex-situ