Judul: Efektivitas Media Sosial Instagram sebagai Media Promosi Batik Solo “Inasinul”
Abstrak: Instagram as a social media is used by Batik “Inasinul” to promote their product. The purpose of this study was to analyze the effectiveness of promotional products Batik "Inasinul" via instagram. Another aim is to analyze the factors related promotional effectiveness batik "Inasinul". This study uses a survey supported by quantitative data and qualitative form of an online questionnaire in the form of interviews with business owners as an informant. The results showed that social media instagram effective in stimulating attention, increase knowledge of the respondent will be marketed products, and changing attitudes of respondents from the stage of attention to the stage of interest . In addition, factors associated with the effectiveness of the promotion through the stages of attention, interest, desire, and action that promotional activities conducted via instagram and psychological factors consumers Batik "Inasinul"
Keyword: Bogor Agricultural University, effectiveness, promotion, social media, instagram

Judul: Efektivitas Instagram sebagai Media Promosi Produk Olahan Pertanian Serambi Botani.
Abstrak: Produk olahan pertanian yang sebagian besar beroperasi di pedesaan dan berupa sektor usaha kecil biasanya membuat promosi melalui media konvensional seperti brosur, poster, booklet dan lainnya sudah tidak efektif. Penjualan secara konvensional mulai banyak ditinggalkan karena munculnya inovasi dalam teknologi informasi dan komunikasi dimana pembelian barang atau jasa dapat dilakukan melalui internet salah satunya media sosial instagram. Tujuan penelitian adalah menghasilkan analisis efektivitas instagram sebagai media promosi, menganalisis hubungan karakteristik followers dengan tingkat keterdedahan media sosial serta menganalisis hubungan tingkat keterdedahan media sosial dengan efektivitas instagram sebagai media promosi. Penelitian menggunakan metode survei dengan data kuantitatif berupa kuesioner online yang didukung oleh data kualitatif berupa wawancara mendalam dengan satu orang admin instagram Serambi Botani sebagai informan. Jumlah responden dalam penelitian adalah 40 orang. Hasil penelitian menunjukkan bahwa instagram efektif dalam meningkatkan pengetahuan (aspek kognitif) responden terkait produk olahan pertanian Serambi Botani.
Keyword: efektivitas media sosial, instagram, karakteristik, keterdedahan media sosial, produk olahan pertanian

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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