Judul: Pengaruh Electronic Word of Mouth, Perceived Quality, dan Brand Image terhadap Keputusan Pembelian Smartphone
Abstrak: Persaingan bisnis di industri smartphone yang kompetitif menuntut produsen untuk selalu memenangkan keputusan pembelian konsumen. Beberapa faktor yang dapat berpengaruh terhadap keputusan pembelian adalah faktor budaya, faktor sosial, faktor pribadi, faktor psikologis dan faktor situasional. Penelitian ini bertujuan untuk melihat pengaruh electronic word of mouth, perceived quality, dan brand image terhadap keputusan pembelian smartphone. Metode pengambilan responden menggunakan purposive sampling dengan jumlah 170 orang data dikumpulkan melalui pengisian kuesioner secara online. Analisis data menggunakan Partial Least Square-Structural Equation Model (PLS-SEM). Hasil penelitian menunjukkan bahwa electronic word of mouth, perceived quality, dan brand image berpengaruh positif dan signifikan terhadap keputusan pembelian dan brand image memiliki pengaruh terbesar terhadap keputusan pembelian. Upaya yang dapat dilakukan perusahaan smartphone untuk dapat bersaing di industri adalah menjaga perceived quality dengan menyesuaikan espektasi konsumen terhadap produk yang dikeluarkan, mengelola reputasi secara proaktif dengan menggunakan electronic word of mouth, secara aktif mengelola brand image yang baik melalui kampanye pemasaran, dan menggunakan influencer marketing.
Keyword: brand image, electronic word of mouth, keputusan pembelian, perceived quality, PLS-SEM

Judul: Pengaruh Persepsi Konsumen terhadap Keputusan Pembelian Smartphone Samsung Android di Kota Bogor
Abstrak: Penggunaan ponsel di Indonesia terus mengalami peningkatan. Perusahaan harus mampu bersaing dari segi persepsi konsumen khusunya harga, kualitas, citra merek, dan promosi penjualan. Tujuan penelitian ini adalah untuk mengidentifikasi karakteristik responden, menganalisis persepsi konsumen, dan mengkaji pengaruh persepsi konsumen terkait harga, kualitas, citra merek, dan promosi penjualan terhadap pengambilan keputusan pembelian smartphone Samsung android. Metode penelitian yang digunakan adalah analisis regresi linear berganda untuk mengetahui apakah setiap faktor dapat memberikan pengaruh yang signifikan terhadap pembelian. Hasil Uji F menunjukkan bahwa persepsi konsumen (harga, kualitas, citra merek, dan promosi penjualan) secara simultan mempengaruhi keputusan pembelian smartphone Samsung android. Hasil uji t menunjukkan bahwa citra merek (sig 0.157) tidak berpengaruh nyata terhadap keputusan pembelian. Harga (sig 0.006), kualitas (sig 0.000), dan promosi penjualan (sig 0.000) memiliki pengaruh positif dan signifikan terhadap pengambilan keputusan pembelian smartphone Samsung android.
Keyword: keputusan pembelian, persepsi konsumen, regresi linier berganda, Samsung

Judul: Development of DNA Vaccine Encoding Glycoprotein of Koi Herpes Virus Using Local Isolate.
Abstrak: The aim of this research was to develop DNA vaccine of Koi Herpesvirus in carp. Glycoprotein gene originated from ORF 25 KHV virus that is 1.8 kbp in size, is a potential gene in DNA vaccine construction. The sequencing and similarity analysis of the gene using BLAST software showed that this gene is a GP25 gene and was found to be very similar (99%) to GP25 of KHV virus from the USA and Israel. When this GP25 gene was ligated with pGEMT Easy (pT, 3 kbp in size) vector, plasmid size was increasing up to 5 kb. Following this, a digestion of pT-GP25 plasmid using Sal I enzyme was applied resulted in a GP25 fragment (1.8 kbp). Subsequently, pAct-D6 with a size of 8.5 kbp was also cut using the same enzyme to eleminate a D6 gene with a size of 1.6 kbp. GP25 gene was then ligated with pAct resulted a pAct-GP25 plasmid with a size of 8.8 kbp. As there was only one restriction site applied, ligation can be occurred in two different directions. Thus, in order to determine the plasmid with the desired direction PCR analysis was carried out, and plasmid with the right direction was the one that sized approximately 2.1 kbp (no. 6, 17 and 20). High level of GFP gene expression was detected in all tissues analyzed, i.e. kidney, gil, spleen, and muscle 24 hours after injection which indicated that β-actin promoter of Japanese medaka could be active in common carp. Although not as high as on 24 hours, expression was still detected until day 7 and disappeared after day 28 post injection indicating that pAct-GFP can be remained and β-actin promoter of Japanese medaka can be active in muscle, gills and kidney at least a week after injection. The result of RT-PCR analysis on pAct-GP25 injected common carp showed that GP25 gene expression can be detected 14 days after injection in all tissues observed. The expression level differences between GFP and GP25 genes possibly related to the primer sensitivity on annealing process to cDNA template and the size of PCR targeted DNA fragment, as smaller PCR targeted product will be easier to be amplified than a bigger one. The length of PCR targeted DNA with GP25 primer was 1.8 kbp whereas GFP gene was 0.6 kbp.The challenge test on common carp results showed that all unvaccinated and negative control (not infected with KHV) was alive until the end of the experiment. Whereas, the survival of fish vaccinated with a dose of 12.5 was ranged from 60.9 and 96.7%. In relation to the activity of β-actin promoter that was used in this DNA vaccine, gene expression was occured 24 hours after vaccination and remained until 2 weeks. The control fish that was not injected by GP25 showed no GP25 expression either in the observed tissues or organs and resulted in a lower survival, i.e. 23.3%. The challenge test results has indicated that the fish vaccinated with GP25 at doses of 7.5 and 12.5 μg/100μL were able to produce KHV glycoprotein in their body which would be
Keyword: