Judul: Faktor-faktor yang Memengaruhi Keputusan Pembelian Roti Merek Sari Roti (Studi Kasus Mahasiswa S1 Institut Pertanian Bogor)
Abstrak: Sari Roti is a bakery product which has many types and flavours produced by Nippon Indosari Corpindo. The purpose of this research is to describe and analyze the factors that influence purchasing decision of Sari Roti brand on BAU’s undergraduate students as consumers. The product’s attributes that are considered in validity and reliability test comprise price, variant, raw material quality, accesibility, product information, “halal” label, texture, taste, brand, expired date information, colour and its flavour. Meanwhile personal influences covered age, gender, pocket money monthly and the credit taken. Descriptive analysis, Fishbein Multi-attribute Attitude Model and Rank Spearman test from one hundred respondents shows that in general five stages of purchasing decision was passed and make expired date clarity into the most important consideration of attributes. Overall, students’s attitude toward Sari Roti brand is positive.
Keyword: Sari Roti brand, influences, decision, attributes

Judul: Faktor-Faktor yang Memengaruhi Keputusan Mahasiswa dalam Membeli Produk Roti Berlabel Halal LPPOM MUI
Abstrak: Roti merupakan salah satu jenis makanan yang menggunakan bahan tambahan makanan sangat kompleks sehingga berpeluang besar masuknya bahan haram ke dalam produk roti. Bahan tambahan makanan yang diharamkan diantaranya margarin dan flavor dari lemak babi, cokelat dari pankreas babi, rhum dari alkohol (khamr), kuas dari kulit babi, dan lisetin pada terigu dari rambut manusia. Angka konsumsi produk roti di Indonesia berdasarkan data statistik Kementerian Pertanian cukup tinggi. Namun, dibandingkan dengan jumlah produsen roti yang belum berlabel halal, jumlah produsen roti yang berlabel halal masih tergolong sedikit. Hasil penelitian dengan metode regresi logistik menunjukkan terdapat empat variabel yang signifikan berpengaruh positif terhadap keputusan mahasiswa dalam membeli roti berlabel halal, diantaranya pengetahuan mengenai makanan halal, pengetahuan mengenai kehalalan roti, loyalitas terhadap label halal, dan pemasukan. Hasil studi menunjukkan pengetahuan mengenai makanan halal, citra LPPOM MUI, kesadaran akan kesehatan, aksesibilitas, dan loyalitas terhadap label halal responden berada pada kategori baik, sedangkan pengetahuan mengenai kehalalan roti responden berada pada kategori kurang baik
Keyword: bakery products, buying decision, halal label, logistic regression method, LPPOM MUI, student

Judul: Mathematical model of Hematopoietic Stem Cell in Chronic Myelogenous Leukemia with and without Therapy
Abstrak: Leukemia or blood cancer is a diverse group of neoplastic disease, characterized by the multiplication of abnormal leukocytes or malignant transformation of blood-forming cells in bone marrow and lymphoid tissues. One of the most common types of leukemia is Chronic Myelogenous Leukemia (CML), which is usually diagnosed by the presence of certain chromosomal abnormalities, the so-called Philadelphia chromosome (Ph). One of the treatments of CML is Granulocyte Colony-Stimulating Factor (G-CSF). In this paper, we discuss two Hematopoietic Stem Cell (HSC) models, i.e. HSC without treatment and HSC with G-CSF treatment. The model of HSC without treatment included three equations representing the dynamics of HSC, leukocyte and platelet. Whereas, the model of HSC with G-CSF treatment includes the previous three equations and adds two more equations representing G-CSF injection and G-CSF circulation. The stability behavior of the system approaching the equilibrium points in the simulation study is carried out using Mathematica 7.0. The simulation results show that the G-CSF treatment can successfully decrease the number of HSC, which means reducing the CML.
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