Judul: Analisis Tingkat Kepuasan Konsumen Terhadap Jasa Pelayanan Clappertaart Huizekota Bogor
Abstrak: Pada tahun 2010 sampai 2014 jumlah restoran di Kota Bogor berkembang dengan pesat. Clappertaart Huize adalah salah satu restoran yang cukup terkenal di Kota Bogor yang menawarkan konsep snack bar dan restoran menjadi satu menawarkan berbagai macam produk dan fasilitas sebagai keunikan dan daya tarik konsumen.Tujuan dari penelitian ini adalah mempelajari kepuasan konsumen terhadap produk dan jasa yang ditawarkan oleh Clappertaart Huize. Data dikumpulkan dari 100 responden yang dipilih secara sengaja.Respon konsumen mencakup harapan dan kinerja produk dan jasa restoran diukur dengan skala Likert. Data dianalisis dengan menggunakan metode Importance Performance Analysis (IPA) diagram, Customer Satisfaction Index(CSI) dan Chi Square. Hasil menunjukkan bahwa konsumen merasa puas terhadap atribut produk daripada atribut jasa restoran Clappertaart Huize. Kesimpulannya adalah bahwa restoran Clappertaart Huize telah berhasil memuaskan konsumen.
Keyword: kepuasan konsumen, restoran, tingkat kepentingan, tingkat kinerja

Judul: Proses Pengambilan Keputusan Pembelian dan Tingkat Kepuasan Konsumen Klappertaart Huize Bogor-Jawa Barat
Abstrak: Klappertaart Huize is a restaurants that offers Holland snack with the main menu of klappertaart. Klappertaart Huize Restaurant is located at Jalan Pangrango number 25 Bogor. This research is aimed to analyze the characteristic of consumer, decision making process of purchasing and consumer’s satisfaction level of Klappertaart Huize. According to research finding, the majority consumers of Klappertaart Huize are 17 – 26 years old of aged female, lived in Jakarta, undergraduate student, unmarried, and having monthly incomes of Rp 2 500 000 – Rp 5 000 000. Overall, according to Customer Satisfaction Index (CSI) it is obtained 73,97 percent of value meaning that consumer has already satisfied with the restaurant’s performance. Importance Performance Analysis (IPA) shows that some attributes requiring consideration of performance refinement is such as taste variation of klappertaart, the price of klappertaart, the waiters’ hospitality and courtesy, the waiters’ proactive, the waiters’ knowledge and ability, and detail information of list of menu.
Keyword: Bogor Agricultural University (IPB), custumers’satisfaction, Klappertaart Huize, customer characteristic, Consumer behavior

Judul: Dynamical System of Hepatitis B in Three Groups with Vaccination
Abstrak: The aim of this study is to modify the hepatitis B transmission model in three age groups involving vaccination from the model conducted by Zhoe and Zhang.The method used is to analyze the stability of the fixed point and its basic reproduction number (R_0). Performed stability analysis and numerical simulation to see population dynamics. Next, a sensitivity analysis of the parameters was carried out to see its effect on R_0. From the analysis obtained two fixed points, namely non-endemic and endemic fixed points. Non-endemic fixed points are locally asymptotically stable if R_0 <1 Meanwhile, the endemic fixed point is locally asymptotically stable if R_0 > 1. Hepatitis vaccination affects the number of susceptible population, because the more successful the vaccination, the smaller the number of susceptible populations so that the smaller the population will be infected.
Keyword: Dynamic, Hepatitis B, Vaccine, Mathematical model