Judul: Analisis Atribut Mutu pada Produk Bubur Instan dalam Kemasan Menggunakan Klasifikasi Caswell
Abstrak: Frekuensi konsumsi makanan instan oleh masyarakat Indonesia cukup tinggi. Angka konsumsi bubur instan di Indonesia sempat melonjak tinggi pada tahun 2011 – 2015. Akan tetapi seiring berjalannya waktu angka konsumsi bubur instan semakin menurun, padahal bubur instan dapat menjadi salah satu alternatif pengganti sarapan untuk menjaga angka sarapan di Indonesia. Perlu dilakukan analisis atribut mutu bubur instan kemasan yang sesuai dengan preferensi konsumen agar industri bubur instan dapat mengembangkan produknya dengan tepat. Penelitian ini bertujuan mengetahui atribut mutu dominan pada bubur instan kemasan menggunakan klasifikasi Caswell dan mengetahui faktor-faktor yang secara signifikan memengaruhi penilaian konsumen terhadapat atribut mutu bubur instan kemasan. Pengambilan data dilakukan dengan menyebar kuesioner online dengan teknik pengambilan sampel convenience sampling. Data diolah dengan analisis crosstab, analisis korelasi, analisis faktor, uji Kruskal-Wallis, dan uji lanjut multiple Dunn menggunakan bantuan SPSS. Atribut mutu dominan bubur instan adalah sensori, sertifikasi, dan keamanan pangan. Usia konsumen secara signifikan memengaruhi penilaian terhadap atribut mutu kandungan gizi, sensori, dan proses pada bubur instan. Bubur instan kemasan sachet plastik merupakan jenis yang paling sering dikonsumsi. Akan tetapi bubur instan kemasan cup plastik memiliki penilaian atribut mutu yang lebih unggul.
Keyword: Caswell's classification, instant porridge, quality attribute

Judul: Analisis Atribut Mutu pada Produk Pangan Kemasan dan Mi Instan Menggunakan Klasifikasi Caswell
Abstrak: Packaged foods have various characters and attributes which reflect both intrinsic and extrinsic qualities. A typical packaged food may have unique and different features that can distinguish the quality. Packaged instant noodles consists of four types and each type may have different quality attributes. After assessing the important quality attributes in packaged foods, four types of instant noodles were determined their dominant quality attributes. The objectives of this study were to determine the dominant quality attributes in packaged foods and instant noodles, including the influence of economic and socio-demographic factors on choosing food quality attributes. The study was conducted by using online survey. Result indicated that certification and food safety was assessed as dominant quality attributes in packaged foods. NADFC and Halal certification were the important certifications desired by respondents. On food safety attribute, they were especially concerned about the use of food additives in packaged foods. Others Caswell’s quality attributes such as functional properties, taste, composition integrity, material’s origin, and organic nature were also analysed as important quality attributes in packaged food product. Although certification was the most important quality attribute, combination of intrinsic attibutes had great effect in forming whole packaged food quality. There were weak relationships between age, education, and income level towards the importance level of food safety, sensory, price, and manufacturer attributes. Regarding instant noodles, average ranking of attributes of regular instant noodle are higher on nut
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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